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[tor-commits] [tor/maint-0.3.5] Merge remote-tracking branch 'tor-github/pr/726' into maint-0.3.5
commit cb084de5e5dddee69abd55e3f4ed3a5ce9ebc9a2
Merge: 2ae67fee4 1b9e77349
Author: teor <teor@xxxxxxxxxxxxxx>
Date: Fri Apr 19 11:51:05 2019 +1000
Merge remote-tracking branch 'tor-github/pr/726' into maint-0.3.5
changes/bug13221 | 5 +++++
src/app/config/config.c | 8 ++++----
2 files changed, 9 insertions(+), 4 deletions(-)
diff --cc src/app/config/config.c
index e06c77e43,000000000..2a504d306
mode 100644,000000..100644
--- a/src/app/config/config.c
+++ b/src/app/config/config.c
@@@ -1,8507 -1,0 +1,8507 @@@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2019, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file config.c
+ * \brief Code to interpret the user's configuration of Tor.
+ *
+ * This module handles torrc configuration file, including parsing it,
+ * combining it with torrc.defaults and the command line, allowing
+ * user changes to it (via editing and SIGHUP or via the control port),
+ * writing it back to disk (because of SAVECONF from the control port),
+ * and -- most importantly, acting on it.
+ *
+ * The module additionally has some tools for manipulating and
+ * inspecting values that are calculated as a result of the
+ * configured options.
+ *
+ * <h3>How to add new options</h3>
+ *
+ * To add new items to the torrc, there are a minimum of three places to edit:
+ * <ul>
+ * <li>The or_options_t structure in or.h, where the options are stored.
+ * <li>The option_vars_ array below in this module, which configures
+ * the names of the torrc options, their types, their multiplicities,
+ * and their mappings to fields in or_options_t.
+ * <li>The manual in doc/tor.1.txt, to document what the new option
+ * is, and how it works.
+ * </ul>
+ *
+ * Additionally, you might need to edit these places too:
+ * <ul>
+ * <li>options_validate() below, in case you want to reject some possible
+ * values of the new configuration option.
+ * <li>options_transition_allowed() below, in case you need to
+ * forbid some or all changes in the option while Tor is
+ * running.
+ * <li>options_transition_affects_workers(), in case changes in the option
+ * might require Tor to relaunch or reconfigure its worker threads.
+ * <li>options_transition_affects_descriptor(), in case changes in the
+ * option might require a Tor relay to build and publish a new server
+ * descriptor.
+ * <li>options_act() and/or options_act_reversible(), in case there's some
+ * action that needs to be taken immediately based on the option's
+ * value.
+ * </ul>
+ *
+ * <h3>Changing the value of an option</h3>
+ *
+ * Because of the SAVECONF command from the control port, it's a bad
+ * idea to change the value of any user-configured option in the
+ * or_options_t. If you want to sometimes do this anyway, we recommend
+ * that you create a secondary field in or_options_t; that you have the
+ * user option linked only to the secondary field; that you use the
+ * secondary field to initialize the one that Tor actually looks at; and that
+ * you use the one Tor looks as the one that you modify.
+ **/
+
+#define CONFIG_PRIVATE
+#include "core/or/or.h"
+#include "app/config/config.h"
+#include "app/config/confparse.h"
+#include "app/config/statefile.h"
+#include "app/main/main.h"
+#include "core/mainloop/connection.h"
+#include "core/mainloop/cpuworker.h"
+#include "core/mainloop/mainloop.h"
+#include "core/mainloop/netstatus.h"
+#include "core/or/channel.h"
+#include "core/or/circuitbuild.h"
+#include "core/or/circuitlist.h"
+#include "core/or/circuitmux.h"
+#include "core/or/circuitmux_ewma.h"
+#include "core/or/circuitstats.h"
+#include "core/or/connection_edge.h"
+#include "core/or/connection_or.h"
+#include "core/or/dos.h"
+#include "core/or/policies.h"
+#include "core/or/relay.h"
+#include "core/or/scheduler.h"
+#include "feature/client/addressmap.h"
+#include "feature/client/bridges.h"
+#include "feature/client/entrynodes.h"
+#include "feature/client/transports.h"
+#include "feature/control/control.h"
+#include "feature/dirauth/bwauth.h"
+#include "feature/dirauth/guardfraction.h"
+#include "feature/dircache/consdiffmgr.h"
+#include "feature/dircache/dirserv.h"
+#include "feature/dircommon/voting_schedule.h"
+#include "feature/hibernate/hibernate.h"
+#include "feature/hs/hs_config.h"
+#include "feature/nodelist/dirlist.h"
+#include "feature/nodelist/networkstatus.h"
+#include "feature/nodelist/nickname.h"
+#include "feature/nodelist/nodelist.h"
+#include "feature/nodelist/routerlist.h"
+#include "feature/nodelist/routerset.h"
+#include "feature/relay/dns.h"
+#include "feature/relay/ext_orport.h"
+#include "feature/relay/routermode.h"
+#include "feature/rend/rendclient.h"
+#include "feature/rend/rendservice.h"
+#include "lib/geoip/geoip.h"
+#include "feature/stats/geoip_stats.h"
+#include "feature/stats/predict_ports.h"
+#include "feature/stats/rephist.h"
+#include "lib/compress/compress.h"
+#include "lib/crypt_ops/crypto_init.h"
+#include "lib/crypt_ops/crypto_rand.h"
+#include "lib/crypt_ops/crypto_util.h"
+#include "lib/encoding/confline.h"
+#include "lib/log/git_revision.h"
+#include "lib/net/resolve.h"
+#include "lib/sandbox/sandbox.h"
+
+#ifdef ENABLE_NSS
+#include "lib/crypt_ops/crypto_nss_mgt.h"
+#else
+#include "lib/crypt_ops/crypto_openssl_mgt.h"
+#endif
+
+#ifdef _WIN32
+#include <shlobj.h>
+#endif
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "lib/meminfo/meminfo.h"
+#include "lib/osinfo/uname.h"
+#include "lib/process/daemon.h"
+#include "lib/process/pidfile.h"
+#include "lib/process/restrict.h"
+#include "lib/process/setuid.h"
+#include "lib/process/subprocess.h"
+#include "lib/net/gethostname.h"
+#include "lib/thread/numcpus.h"
+
+#include "lib/encoding/keyval.h"
+#include "lib/fs/conffile.h"
+#include "lib/evloop/procmon.h"
+
+#include "feature/dirauth/dirvote.h"
+#include "feature/dirauth/recommend_pkg.h"
+#include "feature/dirauth/authmode.h"
+
+#include "core/or/connection_st.h"
+#include "core/or/port_cfg_st.h"
+
+#ifdef HAVE_SYSTEMD
+# if defined(__COVERITY__) && !defined(__INCLUDE_LEVEL__)
+/* Systemd's use of gcc's __INCLUDE_LEVEL__ extension macro appears to confuse
+ * Coverity. Here's a kludge to unconfuse it.
+ */
+# define __INCLUDE_LEVEL__ 2
+#endif /* defined(__COVERITY__) && !defined(__INCLUDE_LEVEL__) */
+#include <systemd/sd-daemon.h>
+#endif /* defined(HAVE_SYSTEMD) */
+
+/* Prefix used to indicate a Unix socket in a FooPort configuration. */
+static const char unix_socket_prefix[] = "unix:";
+/* Prefix used to indicate a Unix socket with spaces in it, in a FooPort
+ * configuration. */
+static const char unix_q_socket_prefix[] = "unix:\"";
+
+/* limits for TCP send and recv buffer size used for constrained sockets */
+#define MIN_CONSTRAINED_TCP_BUFFER 2048
+#define MAX_CONSTRAINED_TCP_BUFFER 262144 /* 256k */
+
+/** macro to help with the bulk rename of *DownloadSchedule to
+ * *DowloadInitialDelay . */
+#define DOWNLOAD_SCHEDULE(name) \
+ { #name "DownloadSchedule", #name "DownloadInitialDelay", 0, 1 }
+
+/** A list of abbreviations and aliases to map command-line options, obsolete
+ * option names, or alternative option names, to their current values. */
+static config_abbrev_t option_abbrevs_[] = {
+ PLURAL(AuthDirBadDirCC),
+ PLURAL(AuthDirBadExitCC),
+ PLURAL(AuthDirInvalidCC),
+ PLURAL(AuthDirRejectCC),
+ PLURAL(EntryNode),
+ PLURAL(ExcludeNode),
+ PLURAL(FirewallPort),
+ PLURAL(LongLivedPort),
+ PLURAL(HiddenServiceNode),
+ PLURAL(HiddenServiceExcludeNode),
+ PLURAL(NumCPU),
+ PLURAL(RendNode),
+ PLURAL(RecommendedPackage),
+ PLURAL(RendExcludeNode),
+ PLURAL(StrictEntryNode),
+ PLURAL(StrictExitNode),
+ PLURAL(StrictNode),
+ { "l", "Log", 1, 0},
+ { "AllowUnverifiedNodes", "AllowInvalidNodes", 0, 0},
+ { "AutomapHostSuffixes", "AutomapHostsSuffixes", 0, 0},
+ { "AutomapHostOnResolve", "AutomapHostsOnResolve", 0, 0},
+ { "BandwidthRateBytes", "BandwidthRate", 0, 0},
+ { "BandwidthBurstBytes", "BandwidthBurst", 0, 0},
+ { "DirFetchPostPeriod", "StatusFetchPeriod", 0, 0},
+ { "DirServer", "DirAuthority", 0, 0}, /* XXXX later, make this warn? */
+ { "MaxConn", "ConnLimit", 0, 1},
+ { "MaxMemInCellQueues", "MaxMemInQueues", 0, 0},
+ { "ORBindAddress", "ORListenAddress", 0, 0},
+ { "DirBindAddress", "DirListenAddress", 0, 0},
+ { "SocksBindAddress", "SocksListenAddress", 0, 0},
+ { "UseHelperNodes", "UseEntryGuards", 0, 0},
+ { "NumHelperNodes", "NumEntryGuards", 0, 0},
+ { "UseEntryNodes", "UseEntryGuards", 0, 0},
+ { "NumEntryNodes", "NumEntryGuards", 0, 0},
+ { "ResolvConf", "ServerDNSResolvConfFile", 0, 1},
+ { "SearchDomains", "ServerDNSSearchDomains", 0, 1},
+ { "ServerDNSAllowBrokenResolvConf", "ServerDNSAllowBrokenConfig", 0, 0},
+ { "PreferTunnelledDirConns", "PreferTunneledDirConns", 0, 0},
+ { "BridgeAuthoritativeDirectory", "BridgeAuthoritativeDir", 0, 0},
+ { "HashedControlPassword", "__HashedControlSessionPassword", 1, 0},
+ { "VirtualAddrNetwork", "VirtualAddrNetworkIPv4", 0, 0},
+ { "SocksSocketsGroupWritable", "UnixSocksGroupWritable", 0, 1},
+ { "_HSLayer2Nodes", "HSLayer2Nodes", 0, 1 },
+ { "_HSLayer3Nodes", "HSLayer3Nodes", 0, 1 },
+
+ DOWNLOAD_SCHEDULE(ClientBootstrapConsensusAuthority),
+ DOWNLOAD_SCHEDULE(ClientBootstrapConsensusAuthorityOnly),
+ DOWNLOAD_SCHEDULE(ClientBootstrapConsensusFallback),
+ DOWNLOAD_SCHEDULE(TestingBridge),
+ DOWNLOAD_SCHEDULE(TestingBridgeBootstrap),
+ DOWNLOAD_SCHEDULE(TestingClient),
+ DOWNLOAD_SCHEDULE(TestingClientConsensus),
+ DOWNLOAD_SCHEDULE(TestingServer),
+ DOWNLOAD_SCHEDULE(TestingServerConsensus),
+
+ { NULL, NULL, 0, 0},
+};
+
+/** dummy instance of or_options_t, used for type-checking its
+ * members with CONF_CHECK_VAR_TYPE. */
+DUMMY_TYPECHECK_INSTANCE(or_options_t);
+
+/** An entry for config_vars: "The option <b>name</b> has type
+ * CONFIG_TYPE_<b>conftype</b>, and corresponds to
+ * or_options_t.<b>member</b>"
+ */
+#define VAR(name,conftype,member,initvalue) \
+ { name, CONFIG_TYPE_ ## conftype, offsetof(or_options_t, member), \
+ initvalue CONF_TEST_MEMBERS(or_options_t, conftype, member) }
+/** As VAR, but the option name and member name are the same. */
+#define V(member,conftype,initvalue) \
+ VAR(#member, conftype, member, initvalue)
+/** An entry for config_vars: "The option <b>name</b> is obsolete." */
+#ifdef TOR_UNIT_TESTS
+#define OBSOLETE(name) { name, CONFIG_TYPE_OBSOLETE, 0, NULL, {.INT=NULL} }
+#else
+#define OBSOLETE(name) { name, CONFIG_TYPE_OBSOLETE, 0, NULL }
+#endif
+
+/**
+ * Macro to declare *Port options. Each one comes in three entries.
+ * For example, most users should use "SocksPort" to configure the
+ * socks port, but TorBrowser wants to use __SocksPort so that it
+ * isn't stored by SAVECONF. The SocksPortLines virtual option is
+ * used to query both options from the controller.
+ */
+#define VPORT(member) \
+ VAR(#member "Lines", LINELIST_V, member ## _lines, NULL), \
+ VAR(#member, LINELIST_S, member ## _lines, NULL), \
+ VAR("__" #member, LINELIST_S, member ## _lines, NULL)
+
+/** UINT64_MAX as a decimal string */
+#define UINT64_MAX_STRING "18446744073709551615"
+
+/** Array of configuration options. Until we disallow nonstandard
+ * abbreviations, order is significant, since the first matching option will
+ * be chosen first.
+ */
+static config_var_t option_vars_[] = {
+ V(AccountingMax, MEMUNIT, "0 bytes"),
+ VAR("AccountingRule", STRING, AccountingRule_option, "max"),
+ V(AccountingStart, STRING, NULL),
+ V(Address, STRING, NULL),
+ OBSOLETE("AllowDotExit"),
+ OBSOLETE("AllowInvalidNodes"),
+ V(AllowNonRFC953Hostnames, BOOL, "0"),
+ OBSOLETE("AllowSingleHopCircuits"),
+ OBSOLETE("AllowSingleHopExits"),
+ V(AlternateBridgeAuthority, LINELIST, NULL),
+ V(AlternateDirAuthority, LINELIST, NULL),
+ OBSOLETE("AlternateHSAuthority"),
+ V(AssumeReachable, BOOL, "0"),
+ OBSOLETE("AuthDirBadDir"),
+ OBSOLETE("AuthDirBadDirCCs"),
+ V(AuthDirBadExit, LINELIST, NULL),
+ V(AuthDirBadExitCCs, CSV, ""),
+ V(AuthDirInvalid, LINELIST, NULL),
+ V(AuthDirInvalidCCs, CSV, ""),
+ V(AuthDirFastGuarantee, MEMUNIT, "100 KB"),
+ V(AuthDirGuardBWGuarantee, MEMUNIT, "2 MB"),
+ V(AuthDirPinKeys, BOOL, "1"),
+ V(AuthDirReject, LINELIST, NULL),
+ V(AuthDirRejectCCs, CSV, ""),
+ OBSOLETE("AuthDirRejectUnlisted"),
+ OBSOLETE("AuthDirListBadDirs"),
+ V(AuthDirListBadExits, BOOL, "0"),
+ V(AuthDirMaxServersPerAddr, UINT, "2"),
+ OBSOLETE("AuthDirMaxServersPerAuthAddr"),
+ V(AuthDirHasIPv6Connectivity, BOOL, "0"),
+ VAR("AuthoritativeDirectory", BOOL, AuthoritativeDir, "0"),
+ V(AutomapHostsOnResolve, BOOL, "0"),
+ V(AutomapHostsSuffixes, CSV, ".onion,.exit"),
+ V(AvoidDiskWrites, BOOL, "0"),
+ V(BandwidthBurst, MEMUNIT, "1 GB"),
+ V(BandwidthRate, MEMUNIT, "1 GB"),
+ V(BridgeAuthoritativeDir, BOOL, "0"),
+ VAR("Bridge", LINELIST, Bridges, NULL),
+ V(BridgePassword, STRING, NULL),
+ V(BridgeRecordUsageByCountry, BOOL, "1"),
+ V(BridgeRelay, BOOL, "0"),
+ V(BridgeDistribution, STRING, NULL),
+ VAR("CacheDirectory", FILENAME, CacheDirectory_option, NULL),
+ V(CacheDirectoryGroupReadable, AUTOBOOL, "auto"),
+ V(CellStatistics, BOOL, "0"),
+ V(PaddingStatistics, BOOL, "1"),
+ V(LearnCircuitBuildTimeout, BOOL, "1"),
+ V(CircuitBuildTimeout, INTERVAL, "0"),
+ OBSOLETE("CircuitIdleTimeout"),
+ V(CircuitsAvailableTimeout, INTERVAL, "0"),
+ V(CircuitStreamTimeout, INTERVAL, "0"),
+ V(CircuitPriorityHalflife, DOUBLE, "-1.0"), /*negative:'Use default'*/
+ V(ClientDNSRejectInternalAddresses, BOOL,"1"),
+ V(ClientOnly, BOOL, "0"),
+ V(ClientPreferIPv6ORPort, AUTOBOOL, "auto"),
+ V(ClientPreferIPv6DirPort, AUTOBOOL, "auto"),
+ V(ClientRejectInternalAddresses, BOOL, "1"),
+ V(ClientTransportPlugin, LINELIST, NULL),
+ V(ClientUseIPv6, BOOL, "0"),
+ V(ClientUseIPv4, BOOL, "1"),
+ V(ConsensusParams, STRING, NULL),
+ V(ConnLimit, UINT, "1000"),
+ V(ConnDirectionStatistics, BOOL, "0"),
+ V(ConstrainedSockets, BOOL, "0"),
+ V(ConstrainedSockSize, MEMUNIT, "8192"),
+ V(ContactInfo, STRING, NULL),
+ OBSOLETE("ControlListenAddress"),
+ VPORT(ControlPort),
+ V(ControlPortFileGroupReadable,BOOL, "0"),
+ V(ControlPortWriteToFile, FILENAME, NULL),
+ V(ControlSocket, LINELIST, NULL),
+ V(ControlSocketsGroupWritable, BOOL, "0"),
+ V(UnixSocksGroupWritable, BOOL, "0"),
+ V(CookieAuthentication, BOOL, "0"),
+ V(CookieAuthFileGroupReadable, BOOL, "0"),
+ V(CookieAuthFile, STRING, NULL),
+ V(CountPrivateBandwidth, BOOL, "0"),
+ VAR("DataDirectory", FILENAME, DataDirectory_option, NULL),
+ V(DataDirectoryGroupReadable, BOOL, "0"),
+ V(DisableOOSCheck, BOOL, "1"),
+ V(DisableNetwork, BOOL, "0"),
+ V(DirAllowPrivateAddresses, BOOL, "0"),
+ V(TestingAuthDirTimeToLearnReachability, INTERVAL, "30 minutes"),
+ OBSOLETE("DirListenAddress"),
+ V(DirPolicy, LINELIST, NULL),
+ VPORT(DirPort),
+ V(DirPortFrontPage, FILENAME, NULL),
+ VAR("DirReqStatistics", BOOL, DirReqStatistics_option, "1"),
+ VAR("DirAuthority", LINELIST, DirAuthorities, NULL),
+ V(DirCache, BOOL, "1"),
+ /* A DirAuthorityFallbackRate of 0.1 means that 0.5% of clients try an
+ * authority when all fallbacks are up, and 2% try an authority when 25% of
+ * fallbacks are down. (We rebuild the list when 25% of fallbacks are down).
+ *
+ * We want to reduce load on authorities, but keep these two figures within
+ * an order of magnitude, so there isn't too much load shifting to
+ * authorities when fallbacks go down. */
+ V(DirAuthorityFallbackRate, DOUBLE, "0.1"),
+ V(DisableAllSwap, BOOL, "0"),
+ V(DisableDebuggerAttachment, BOOL, "1"),
+ OBSOLETE("DisableIOCP"),
+ OBSOLETE("DisableV2DirectoryInfo_"),
+ OBSOLETE("DynamicDHGroups"),
+ VPORT(DNSPort),
+ OBSOLETE("DNSListenAddress"),
+ /* DoS circuit creation options. */
+ V(DoSCircuitCreationEnabled, AUTOBOOL, "auto"),
+ V(DoSCircuitCreationMinConnections, UINT, "0"),
+ V(DoSCircuitCreationRate, UINT, "0"),
+ V(DoSCircuitCreationBurst, UINT, "0"),
+ V(DoSCircuitCreationDefenseType, INT, "0"),
+ V(DoSCircuitCreationDefenseTimePeriod, INTERVAL, "0"),
+ /* DoS connection options. */
+ V(DoSConnectionEnabled, AUTOBOOL, "auto"),
+ V(DoSConnectionMaxConcurrentCount, UINT, "0"),
+ V(DoSConnectionDefenseType, INT, "0"),
+ /* DoS single hop client options. */
+ V(DoSRefuseSingleHopClientRendezvous, AUTOBOOL, "auto"),
+ V(DownloadExtraInfo, BOOL, "0"),
+ V(TestingEnableConnBwEvent, BOOL, "0"),
+ V(TestingEnableCellStatsEvent, BOOL, "0"),
+ OBSOLETE("TestingEnableTbEmptyEvent"),
+ V(EnforceDistinctSubnets, BOOL, "1"),
+ V(EntryNodes, ROUTERSET, NULL),
+ V(EntryStatistics, BOOL, "0"),
+ V(TestingEstimatedDescriptorPropagationTime, INTERVAL, "10 minutes"),
+ V(ExcludeNodes, ROUTERSET, NULL),
+ V(ExcludeExitNodes, ROUTERSET, NULL),
+ OBSOLETE("ExcludeSingleHopRelays"),
+ V(ExitNodes, ROUTERSET, NULL),
+ V(ExitPolicy, LINELIST, NULL),
+ V(ExitPolicyRejectPrivate, BOOL, "1"),
+ V(ExitPolicyRejectLocalInterfaces, BOOL, "0"),
+ V(ExitPortStatistics, BOOL, "0"),
+ V(ExtendAllowPrivateAddresses, BOOL, "0"),
+ V(ExitRelay, AUTOBOOL, "auto"),
+ VPORT(ExtORPort),
+ V(ExtORPortCookieAuthFile, STRING, NULL),
+ V(ExtORPortCookieAuthFileGroupReadable, BOOL, "0"),
+ V(ExtraInfoStatistics, BOOL, "1"),
+ V(ExtendByEd25519ID, AUTOBOOL, "auto"),
+ V(FallbackDir, LINELIST, NULL),
+
+ V(UseDefaultFallbackDirs, BOOL, "1"),
+
+ OBSOLETE("FallbackNetworkstatusFile"),
+ V(FascistFirewall, BOOL, "0"),
+ V(FirewallPorts, CSV, ""),
+ OBSOLETE("FastFirstHopPK"),
+ V(FetchDirInfoEarly, BOOL, "0"),
+ V(FetchDirInfoExtraEarly, BOOL, "0"),
+ V(FetchServerDescriptors, BOOL, "1"),
+ V(FetchHidServDescriptors, BOOL, "1"),
+ V(FetchUselessDescriptors, BOOL, "0"),
+ OBSOLETE("FetchV2Networkstatus"),
+ V(GeoIPExcludeUnknown, AUTOBOOL, "auto"),
+#ifdef _WIN32
+ V(GeoIPFile, FILENAME, "<default>"),
+ V(GeoIPv6File, FILENAME, "<default>"),
+#else
+ V(GeoIPFile, FILENAME,
+ SHARE_DATADIR PATH_SEPARATOR "tor" PATH_SEPARATOR "geoip"),
+ V(GeoIPv6File, FILENAME,
+ SHARE_DATADIR PATH_SEPARATOR "tor" PATH_SEPARATOR "geoip6"),
+#endif /* defined(_WIN32) */
+ OBSOLETE("Group"),
+ V(GuardLifetime, INTERVAL, "0 minutes"),
+ V(HardwareAccel, BOOL, "0"),
+ V(HeartbeatPeriod, INTERVAL, "6 hours"),
+ V(MainloopStats, BOOL, "0"),
+ V(AccelName, STRING, NULL),
+ V(AccelDir, FILENAME, NULL),
+ V(HashedControlPassword, LINELIST, NULL),
+ OBSOLETE("HidServDirectoryV2"),
+ VAR("HiddenServiceDir", LINELIST_S, RendConfigLines, NULL),
+ VAR("HiddenServiceDirGroupReadable", LINELIST_S, RendConfigLines, NULL),
+ VAR("HiddenServiceOptions",LINELIST_V, RendConfigLines, NULL),
+ VAR("HiddenServicePort", LINELIST_S, RendConfigLines, NULL),
+ VAR("HiddenServiceVersion",LINELIST_S, RendConfigLines, NULL),
+ VAR("HiddenServiceAuthorizeClient",LINELIST_S,RendConfigLines, NULL),
+ VAR("HiddenServiceAllowUnknownPorts",LINELIST_S, RendConfigLines, NULL),
+ VAR("HiddenServiceMaxStreams",LINELIST_S, RendConfigLines, NULL),
+ VAR("HiddenServiceMaxStreamsCloseCircuit",LINELIST_S, RendConfigLines, NULL),
+ VAR("HiddenServiceNumIntroductionPoints", LINELIST_S, RendConfigLines, NULL),
+ VAR("HiddenServiceExportCircuitID", LINELIST_S, RendConfigLines, NULL),
+ VAR("HiddenServiceStatistics", BOOL, HiddenServiceStatistics_option, "1"),
+ V(HidServAuth, LINELIST, NULL),
+ V(ClientOnionAuthDir, FILENAME, NULL),
+ OBSOLETE("CloseHSClientCircuitsImmediatelyOnTimeout"),
+ OBSOLETE("CloseHSServiceRendCircuitsImmediatelyOnTimeout"),
+ V(HiddenServiceSingleHopMode, BOOL, "0"),
+ V(HiddenServiceNonAnonymousMode,BOOL, "0"),
+ V(HTTPProxy, STRING, NULL),
+ V(HTTPProxyAuthenticator, STRING, NULL),
+ V(HTTPSProxy, STRING, NULL),
+ V(HTTPSProxyAuthenticator, STRING, NULL),
+ VPORT(HTTPTunnelPort),
+ V(IPv6Exit, BOOL, "0"),
+ VAR("ServerTransportPlugin", LINELIST, ServerTransportPlugin, NULL),
+ V(ServerTransportListenAddr, LINELIST, NULL),
+ V(ServerTransportOptions, LINELIST, NULL),
+ V(SigningKeyLifetime, INTERVAL, "30 days"),
+ V(Socks4Proxy, STRING, NULL),
+ V(Socks5Proxy, STRING, NULL),
+ V(Socks5ProxyUsername, STRING, NULL),
+ V(Socks5ProxyPassword, STRING, NULL),
+ VAR("KeyDirectory", FILENAME, KeyDirectory_option, NULL),
+ V(KeyDirectoryGroupReadable, BOOL, "0"),
+ VAR("HSLayer2Nodes", ROUTERSET, HSLayer2Nodes, NULL),
+ VAR("HSLayer3Nodes", ROUTERSET, HSLayer3Nodes, NULL),
+ V(KeepalivePeriod, INTERVAL, "5 minutes"),
+ V(KeepBindCapabilities, AUTOBOOL, "auto"),
+ VAR("Log", LINELIST, Logs, NULL),
+ V(LogMessageDomains, BOOL, "0"),
+ V(LogTimeGranularity, MSEC_INTERVAL, "1 second"),
+ V(TruncateLogFile, BOOL, "0"),
+ V(SyslogIdentityTag, STRING, NULL),
+ V(AndroidIdentityTag, STRING, NULL),
+ V(LongLivedPorts, CSV,
+ "21,22,706,1863,5050,5190,5222,5223,6523,6667,6697,8300"),
+ VAR("MapAddress", LINELIST, AddressMap, NULL),
+ V(MaxAdvertisedBandwidth, MEMUNIT, "1 GB"),
+ V(MaxCircuitDirtiness, INTERVAL, "10 minutes"),
+ V(MaxClientCircuitsPending, UINT, "32"),
+ V(MaxConsensusAgeForDiffs, INTERVAL, "0 seconds"),
+ VAR("MaxMemInQueues", MEMUNIT, MaxMemInQueues_raw, "0"),
+ OBSOLETE("MaxOnionsPending"),
+ V(MaxOnionQueueDelay, MSEC_INTERVAL, "1750 msec"),
+ V(MaxUnparseableDescSizeToLog, MEMUNIT, "10 MB"),
+ V(MinMeasuredBWsForAuthToIgnoreAdvertised, INT, "500"),
+ VAR("MyFamily", LINELIST, MyFamily_lines, NULL),
+ V(NewCircuitPeriod, INTERVAL, "30 seconds"),
+ OBSOLETE("NamingAuthoritativeDirectory"),
+ OBSOLETE("NATDListenAddress"),
+ VPORT(NATDPort),
+ V(Nickname, STRING, NULL),
+ OBSOLETE("PredictedPortsRelevanceTime"),
+ OBSOLETE("WarnUnsafeSocks"),
+ VAR("NodeFamily", LINELIST, NodeFamilies, NULL),
+ V(NoExec, BOOL, "0"),
+ V(NumCPUs, UINT, "0"),
+ V(NumDirectoryGuards, UINT, "0"),
+ V(NumEntryGuards, UINT, "0"),
+ V(NumPrimaryGuards, UINT, "0"),
+ V(OfflineMasterKey, BOOL, "0"),
+ OBSOLETE("ORListenAddress"),
+ VPORT(ORPort),
+ V(OutboundBindAddress, LINELIST, NULL),
+ V(OutboundBindAddressOR, LINELIST, NULL),
+ V(OutboundBindAddressExit, LINELIST, NULL),
+
+ OBSOLETE("PathBiasDisableRate"),
+ V(PathBiasCircThreshold, INT, "-1"),
+ V(PathBiasNoticeRate, DOUBLE, "-1"),
+ V(PathBiasWarnRate, DOUBLE, "-1"),
+ V(PathBiasExtremeRate, DOUBLE, "-1"),
+ V(PathBiasScaleThreshold, INT, "-1"),
+ OBSOLETE("PathBiasScaleFactor"),
+ OBSOLETE("PathBiasMultFactor"),
+ V(PathBiasDropGuards, AUTOBOOL, "0"),
+ OBSOLETE("PathBiasUseCloseCounts"),
+
+ V(PathBiasUseThreshold, INT, "-1"),
+ V(PathBiasNoticeUseRate, DOUBLE, "-1"),
+ V(PathBiasExtremeUseRate, DOUBLE, "-1"),
+ V(PathBiasScaleUseThreshold, INT, "-1"),
+
+ V(PathsNeededToBuildCircuits, DOUBLE, "-1"),
+ V(PerConnBWBurst, MEMUNIT, "0"),
+ V(PerConnBWRate, MEMUNIT, "0"),
+ V(PidFile, STRING, NULL),
+ V(TestingTorNetwork, BOOL, "0"),
+ V(TestingMinExitFlagThreshold, MEMUNIT, "0"),
+ V(TestingMinFastFlagThreshold, MEMUNIT, "0"),
+
+ V(TestingLinkCertLifetime, INTERVAL, "2 days"),
+ V(TestingAuthKeyLifetime, INTERVAL, "2 days"),
+ V(TestingLinkKeySlop, INTERVAL, "3 hours"),
+ V(TestingAuthKeySlop, INTERVAL, "3 hours"),
+ V(TestingSigningKeySlop, INTERVAL, "1 day"),
+
+ V(OptimisticData, AUTOBOOL, "auto"),
+ OBSOLETE("PortForwarding"),
+ OBSOLETE("PortForwardingHelper"),
+ OBSOLETE("PreferTunneledDirConns"),
+ V(ProtocolWarnings, BOOL, "0"),
+ V(PublishServerDescriptor, CSV, "1"),
+ V(PublishHidServDescriptors, BOOL, "1"),
+ V(ReachableAddresses, LINELIST, NULL),
+ V(ReachableDirAddresses, LINELIST, NULL),
+ V(ReachableORAddresses, LINELIST, NULL),
+ V(RecommendedVersions, LINELIST, NULL),
+ V(RecommendedClientVersions, LINELIST, NULL),
+ V(RecommendedServerVersions, LINELIST, NULL),
+ V(RecommendedPackages, LINELIST, NULL),
+ V(ReducedConnectionPadding, BOOL, "0"),
+ V(ConnectionPadding, AUTOBOOL, "auto"),
+ V(RefuseUnknownExits, AUTOBOOL, "auto"),
+ V(RejectPlaintextPorts, CSV, ""),
+ V(RelayBandwidthBurst, MEMUNIT, "0"),
+ V(RelayBandwidthRate, MEMUNIT, "0"),
+ V(RendPostPeriod, INTERVAL, "1 hour"),
+ V(RephistTrackTime, INTERVAL, "24 hours"),
+ V(RunAsDaemon, BOOL, "0"),
+ V(ReducedExitPolicy, BOOL, "0"),
+ OBSOLETE("RunTesting"), // currently unused
+ V(Sandbox, BOOL, "0"),
+ V(SafeLogging, STRING, "1"),
+ V(SafeSocks, BOOL, "0"),
+ V(ServerDNSAllowBrokenConfig, BOOL, "1"),
+ V(ServerDNSAllowNonRFC953Hostnames, BOOL,"0"),
+ V(ServerDNSDetectHijacking, BOOL, "1"),
+ V(ServerDNSRandomizeCase, BOOL, "1"),
+ V(ServerDNSResolvConfFile, STRING, NULL),
+ V(ServerDNSSearchDomains, BOOL, "0"),
+ V(ServerDNSTestAddresses, CSV,
+ "www.google.com,www.mit.edu,www.yahoo.com,www.slashdot.org"),
+ OBSOLETE("SchedulerLowWaterMark__"),
+ OBSOLETE("SchedulerHighWaterMark__"),
+ OBSOLETE("SchedulerMaxFlushCells__"),
+ V(KISTSchedRunInterval, MSEC_INTERVAL, "0 msec"),
+ V(KISTSockBufSizeFactor, DOUBLE, "1.0"),
+ V(Schedulers, CSV, "KIST,KISTLite,Vanilla"),
+ V(ShutdownWaitLength, INTERVAL, "30 seconds"),
+ OBSOLETE("SocksListenAddress"),
+ V(SocksPolicy, LINELIST, NULL),
+ VPORT(SocksPort),
+ V(SocksTimeout, INTERVAL, "2 minutes"),
+ V(SSLKeyLifetime, INTERVAL, "0"),
+ OBSOLETE("StrictEntryNodes"),
+ OBSOLETE("StrictExitNodes"),
+ V(StrictNodes, BOOL, "0"),
+ OBSOLETE("Support022HiddenServices"),
+ V(TestSocks, BOOL, "0"),
+ V(TokenBucketRefillInterval, MSEC_INTERVAL, "100 msec"),
+ OBSOLETE("Tor2webMode"),
+ OBSOLETE("Tor2webRendezvousPoints"),
+ OBSOLETE("TLSECGroup"),
+ V(TrackHostExits, CSV, NULL),
+ V(TrackHostExitsExpire, INTERVAL, "30 minutes"),
+ OBSOLETE("TransListenAddress"),
+ VPORT(TransPort),
+ V(TransProxyType, STRING, "default"),
+ OBSOLETE("TunnelDirConns"),
+ V(UpdateBridgesFromAuthority, BOOL, "0"),
+ V(UseBridges, BOOL, "0"),
+ VAR("UseEntryGuards", BOOL, UseEntryGuards_option, "1"),
+ OBSOLETE("UseEntryGuardsAsDirGuards"),
+ V(UseGuardFraction, AUTOBOOL, "auto"),
+ V(UseMicrodescriptors, AUTOBOOL, "auto"),
+ OBSOLETE("UseNTorHandshake"),
+ V(User, STRING, NULL),
+ OBSOLETE("UserspaceIOCPBuffers"),
+ V(AuthDirSharedRandomness, BOOL, "1"),
+ V(AuthDirTestEd25519LinkKeys, BOOL, "1"),
+ OBSOLETE("V1AuthoritativeDirectory"),
+ OBSOLETE("V2AuthoritativeDirectory"),
+ VAR("V3AuthoritativeDirectory",BOOL, V3AuthoritativeDir, "0"),
+ V(TestingV3AuthInitialVotingInterval, INTERVAL, "30 minutes"),
+ V(TestingV3AuthInitialVoteDelay, INTERVAL, "5 minutes"),
+ V(TestingV3AuthInitialDistDelay, INTERVAL, "5 minutes"),
+ V(TestingV3AuthVotingStartOffset, INTERVAL, "0"),
+ V(V3AuthVotingInterval, INTERVAL, "1 hour"),
+ V(V3AuthVoteDelay, INTERVAL, "5 minutes"),
+ V(V3AuthDistDelay, INTERVAL, "5 minutes"),
+ V(V3AuthNIntervalsValid, UINT, "3"),
+ V(V3AuthUseLegacyKey, BOOL, "0"),
+ V(V3BandwidthsFile, FILENAME, NULL),
+ V(GuardfractionFile, FILENAME, NULL),
+ VAR("VersioningAuthoritativeDirectory",BOOL,VersioningAuthoritativeDir, "0"),
+ OBSOLETE("VoteOnHidServDirectoriesV2"),
+ V(VirtualAddrNetworkIPv4, STRING, "127.192.0.0/10"),
+ V(VirtualAddrNetworkIPv6, STRING, "[FE80::]/10"),
+ V(WarnPlaintextPorts, CSV, "23,109,110,143"),
+ OBSOLETE("UseFilteringSSLBufferevents"),
+ OBSOLETE("__UseFilteringSSLBufferevents"),
+ VAR("__ReloadTorrcOnSIGHUP", BOOL, ReloadTorrcOnSIGHUP, "1"),
+ VAR("__AllDirActionsPrivate", BOOL, AllDirActionsPrivate, "0"),
+ VAR("__DisablePredictedCircuits",BOOL,DisablePredictedCircuits, "0"),
+ VAR("__DisableSignalHandlers", BOOL, DisableSignalHandlers, "0"),
+ VAR("__LeaveStreamsUnattached",BOOL, LeaveStreamsUnattached, "0"),
+ VAR("__HashedControlSessionPassword", LINELIST, HashedControlSessionPassword,
+ NULL),
+ VAR("__OwningControllerProcess",STRING,OwningControllerProcess, NULL),
+ VAR("__OwningControllerFD", UINT64, OwningControllerFD, UINT64_MAX_STRING),
+ V(MinUptimeHidServDirectoryV2, INTERVAL, "96 hours"),
+ V(TestingServerDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(TestingClientDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(TestingServerConsensusDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(TestingClientConsensusDownloadInitialDelay, CSV_INTERVAL, "0"),
+ /* With the ClientBootstrapConsensus*Download* below:
+ * Clients with only authorities will try:
+ * - at least 3 authorities over 10 seconds, then exponentially backoff,
+ * with the next attempt 3-21 seconds later,
+ * Clients with authorities and fallbacks will try:
+ * - at least 2 authorities and 4 fallbacks over 21 seconds, then
+ * exponentially backoff, with the next attempts 4-33 seconds later,
+ * Clients will also retry when an application request arrives.
+ * After a number of failed requests, clients retry every 3 days + 1 hour.
+ *
+ * Clients used to try 2 authorities over 10 seconds, then wait for
+ * 60 minutes or an application request.
+ *
+ * When clients have authorities and fallbacks available, they use these
+ * schedules: (we stagger the times to avoid thundering herds) */
+ V(ClientBootstrapConsensusAuthorityDownloadInitialDelay, CSV_INTERVAL, "6"),
+ V(ClientBootstrapConsensusFallbackDownloadInitialDelay, CSV_INTERVAL, "0"),
+ /* When clients only have authorities available, they use this schedule: */
+ V(ClientBootstrapConsensusAuthorityOnlyDownloadInitialDelay, CSV_INTERVAL,
+ "0"),
+ /* We don't want to overwhelm slow networks (or mirrors whose replies are
+ * blocked), but we also don't want to fail if only some mirrors are
+ * blackholed. Clients will try 3 directories simultaneously.
+ * (Relays never use simultaneous connections.) */
+ V(ClientBootstrapConsensusMaxInProgressTries, UINT, "3"),
+ /* When a client has any running bridges, check each bridge occasionally,
+ * whether or not that bridge is actually up. */
+ V(TestingBridgeDownloadInitialDelay, CSV_INTERVAL,"10800"),
+ /* When a client is just starting, or has no running bridges, check each
+ * bridge a few times quickly, and then try again later. These schedules
+ * are much longer than the other schedules, because we try each and every
+ * configured bridge with this schedule. */
+ V(TestingBridgeBootstrapDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(TestingClientMaxIntervalWithoutRequest, INTERVAL, "10 minutes"),
+ V(TestingDirConnectionMaxStall, INTERVAL, "5 minutes"),
+ OBSOLETE("TestingConsensusMaxDownloadTries"),
+ OBSOLETE("ClientBootstrapConsensusMaxDownloadTries"),
+ OBSOLETE("ClientBootstrapConsensusAuthorityOnlyMaxDownloadTries"),
+ OBSOLETE("TestingDescriptorMaxDownloadTries"),
+ OBSOLETE("TestingMicrodescMaxDownloadTries"),
+ OBSOLETE("TestingCertMaxDownloadTries"),
+ V(TestingDirAuthVoteExit, ROUTERSET, NULL),
+ V(TestingDirAuthVoteExitIsStrict, BOOL, "0"),
+ V(TestingDirAuthVoteGuard, ROUTERSET, NULL),
+ V(TestingDirAuthVoteGuardIsStrict, BOOL, "0"),
+ V(TestingDirAuthVoteHSDir, ROUTERSET, NULL),
+ V(TestingDirAuthVoteHSDirIsStrict, BOOL, "0"),
+ VAR("___UsingTestNetworkDefaults", BOOL, UsingTestNetworkDefaults_, "0"),
+
+ END_OF_CONFIG_VARS
+};
+
+/** Override default values with these if the user sets the TestingTorNetwork
+ * option. */
+static const config_var_t testing_tor_network_defaults[] = {
+ V(DirAllowPrivateAddresses, BOOL, "1"),
+ V(EnforceDistinctSubnets, BOOL, "0"),
+ V(AssumeReachable, BOOL, "1"),
+ V(AuthDirMaxServersPerAddr, UINT, "0"),
+ V(ClientBootstrapConsensusAuthorityDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(ClientBootstrapConsensusFallbackDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(ClientBootstrapConsensusAuthorityOnlyDownloadInitialDelay, CSV_INTERVAL,
+ "0"),
+ V(ClientDNSRejectInternalAddresses, BOOL,"0"),
+ V(ClientRejectInternalAddresses, BOOL, "0"),
+ V(CountPrivateBandwidth, BOOL, "1"),
+ V(ExitPolicyRejectPrivate, BOOL, "0"),
+ V(ExtendAllowPrivateAddresses, BOOL, "1"),
+ V(V3AuthVotingInterval, INTERVAL, "5 minutes"),
+ V(V3AuthVoteDelay, INTERVAL, "20 seconds"),
+ V(V3AuthDistDelay, INTERVAL, "20 seconds"),
+ V(TestingV3AuthInitialVotingInterval, INTERVAL, "150 seconds"),
+ V(TestingV3AuthInitialVoteDelay, INTERVAL, "20 seconds"),
+ V(TestingV3AuthInitialDistDelay, INTERVAL, "20 seconds"),
+ V(TestingAuthDirTimeToLearnReachability, INTERVAL, "0 minutes"),
+ V(TestingEstimatedDescriptorPropagationTime, INTERVAL, "0 minutes"),
+ V(MinUptimeHidServDirectoryV2, INTERVAL, "0 minutes"),
+ V(TestingServerDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(TestingClientDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(TestingServerConsensusDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(TestingClientConsensusDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(TestingBridgeDownloadInitialDelay, CSV_INTERVAL, "10"),
+ V(TestingBridgeBootstrapDownloadInitialDelay, CSV_INTERVAL, "0"),
+ V(TestingClientMaxIntervalWithoutRequest, INTERVAL, "5 seconds"),
+ V(TestingDirConnectionMaxStall, INTERVAL, "30 seconds"),
+ V(TestingEnableConnBwEvent, BOOL, "1"),
+ V(TestingEnableCellStatsEvent, BOOL, "1"),
+ VAR("___UsingTestNetworkDefaults", BOOL, UsingTestNetworkDefaults_, "1"),
+ V(RendPostPeriod, INTERVAL, "2 minutes"),
+
+ END_OF_CONFIG_VARS
+};
+
+#undef VAR
+#undef V
+#undef OBSOLETE
+
+static const config_deprecation_t option_deprecation_notes_[] = {
+ /* Deprecated since 0.3.2.0-alpha. */
+ { "HTTPProxy", "It only applies to direct unencrypted HTTP connections "
+ "to your directory server, which your Tor probably wasn't using." },
+ { "HTTPProxyAuthenticator", "HTTPProxy is deprecated in favor of HTTPSProxy "
+ "which should be used with HTTPSProxyAuthenticator." },
+ /* End of options deprecated since 0.3.2.1-alpha */
+
+ /* Options deprecated since 0.3.2.2-alpha */
+ { "ReachableDirAddresses", "It has no effect on relays, and has had no "
+ "effect on clients since 0.2.8." },
+ { "ClientPreferIPv6DirPort", "It has no effect on relays, and has had no "
+ "effect on clients since 0.2.8." },
+ /* End of options deprecated since 0.3.2.2-alpha. */
+
+ { NULL, NULL }
+};
+
+#ifdef _WIN32
+static char *get_windows_conf_root(void);
+#endif
+static int options_act_reversible(const or_options_t *old_options, char **msg);
+static int options_transition_allowed(const or_options_t *old,
+ const or_options_t *new,
+ char **msg);
+static int options_transition_affects_workers(
+ const or_options_t *old_options, const or_options_t *new_options);
+static int options_transition_affects_descriptor(
+ const or_options_t *old_options, const or_options_t *new_options);
+static int options_transition_affects_dirauth_timing(
+ const or_options_t *old_options, const or_options_t *new_options);
+static int normalize_nickname_list(config_line_t **normalized_out,
+ const config_line_t *lst, const char *name,
+ char **msg);
+static char *get_bindaddr_from_transport_listen_line(const char *line,
+ const char *transport);
+static int parse_ports(or_options_t *options, int validate_only,
+ char **msg_out, int *n_ports_out,
+ int *world_writable_control_socket);
+static int check_server_ports(const smartlist_t *ports,
+ const or_options_t *options,
+ int *num_low_ports_out);
+static int validate_data_directories(or_options_t *options);
+static int write_configuration_file(const char *fname,
+ const or_options_t *options);
+static int options_init_logs(const or_options_t *old_options,
+ or_options_t *options, int validate_only);
+
+static void init_libevent(const or_options_t *options);
+static int opt_streq(const char *s1, const char *s2);
+static int parse_outbound_addresses(or_options_t *options, int validate_only,
+ char **msg);
+static void config_maybe_load_geoip_files_(const or_options_t *options,
+ const or_options_t *old_options);
+static int options_validate_cb(void *old_options, void *options,
+ void *default_options,
+ int from_setconf, char **msg);
+static void options_free_cb(void *options);
+static void cleanup_protocol_warning_severity_level(void);
+static void set_protocol_warning_severity_level(int warning_severity);
+
+/** Magic value for or_options_t. */
+#define OR_OPTIONS_MAGIC 9090909
+
+/** Configuration format for or_options_t. */
+STATIC config_format_t options_format = {
+ sizeof(or_options_t),
+ OR_OPTIONS_MAGIC,
+ offsetof(or_options_t, magic_),
+ option_abbrevs_,
+ option_deprecation_notes_,
+ option_vars_,
+ options_validate_cb,
+ options_free_cb,
+ NULL
+};
+
+/*
+ * Functions to read and write the global options pointer.
+ */
+
+/** Command-line and config-file options. */
+static or_options_t *global_options = NULL;
+/** The fallback options_t object; this is where we look for options not
+ * in torrc before we fall back to Tor's defaults. */
+static or_options_t *global_default_options = NULL;
+/** Name of most recently read torrc file. */
+static char *torrc_fname = NULL;
+/** Name of the most recently read torrc-defaults file.*/
+static char *torrc_defaults_fname = NULL;
+/** Configuration options set by command line. */
+static config_line_t *global_cmdline_options = NULL;
+/** Non-configuration options set by the command line */
+static config_line_t *global_cmdline_only_options = NULL;
+/** Boolean: Have we parsed the command line? */
+static int have_parsed_cmdline = 0;
+/** Contents of most recently read DirPortFrontPage file. */
+static char *global_dirfrontpagecontents = NULL;
+/** List of port_cfg_t for all configured ports. */
+static smartlist_t *configured_ports = NULL;
+/** True iff we're currently validating options, and any calls to
+ * get_options() are likely to be bugs. */
+static int in_option_validation = 0;
+/* True iff we've initialized libevent */
+static int libevent_initialized = 0;
+
+/** Return the contents of our frontpage string, or NULL if not configured. */
+MOCK_IMPL(const char*,
+get_dirportfrontpage, (void))
+{
+ return global_dirfrontpagecontents;
+}
+
+/** Returns the currently configured options. */
+MOCK_IMPL(or_options_t *,
+get_options_mutable, (void))
+{
+ tor_assert(global_options);
+ tor_assert_nonfatal(! in_option_validation);
+ return global_options;
+}
+
+/** Returns the currently configured options */
+MOCK_IMPL(const or_options_t *,
+get_options,(void))
+{
+ return get_options_mutable();
+}
+
+/** Change the current global options to contain <b>new_val</b> instead of
+ * their current value; take action based on the new value; free the old value
+ * as necessary. Returns 0 on success, -1 on failure.
+ */
+int
+set_options(or_options_t *new_val, char **msg)
+{
+ int i;
+ smartlist_t *elements;
+ config_line_t *line;
+ or_options_t *old_options = global_options;
+ global_options = new_val;
+ /* Note that we pass the *old* options below, for comparison. It
+ * pulls the new options directly out of global_options. */
+ if (options_act_reversible(old_options, msg)<0) {
+ tor_assert(*msg);
+ global_options = old_options;
+ return -1;
+ }
+ if (options_act(old_options) < 0) { /* acting on the options failed. die. */
+ if (! tor_event_loop_shutdown_is_pending()) {
+ log_err(LD_BUG,
+ "Acting on config options left us in a broken state. Dying.");
+ tor_shutdown_event_loop_and_exit(1);
+ }
+ global_options = old_options;
+ return -1;
+ }
+ /* Issues a CONF_CHANGED event to notify controller of the change. If Tor is
+ * just starting up then the old_options will be undefined. */
+ if (old_options && old_options != global_options) {
+ elements = smartlist_new();
+ for (i=0; options_format.vars[i].name; ++i) {
+ const config_var_t *var = &options_format.vars[i];
+ const char *var_name = var->name;
+ if (var->type == CONFIG_TYPE_LINELIST_S ||
+ var->type == CONFIG_TYPE_OBSOLETE) {
+ continue;
+ }
+ if (!config_is_same(&options_format, new_val, old_options, var_name)) {
+ line = config_get_assigned_option(&options_format, new_val,
+ var_name, 1);
+
+ if (line) {
+ config_line_t *next;
+ for (; line; line = next) {
+ next = line->next;
+ smartlist_add(elements, line->key);
+ smartlist_add(elements, line->value);
+ tor_free(line);
+ }
+ } else {
+ smartlist_add_strdup(elements, options_format.vars[i].name);
+ smartlist_add(elements, NULL);
+ }
+ }
+ }
+ control_event_conf_changed(elements);
+ SMARTLIST_FOREACH(elements, char *, cp, tor_free(cp));
+ smartlist_free(elements);
+ }
+
+ if (old_options != global_options) {
+ or_options_free(old_options);
+ /* If we are here it means we've successfully applied the new options and
+ * that the global options have been changed to the new values. We'll
+ * check if we need to remove or add periodic events. */
+ periodic_events_on_new_options(global_options);
+ }
+
+ return 0;
+}
+
+/** The version of this Tor process, as parsed. */
+static char *the_tor_version = NULL;
+/** A shorter version of this Tor process's version, for export in our router
+ * descriptor. (Does not include the git version, if any.) */
+static char *the_short_tor_version = NULL;
+
+/** Return the current Tor version. */
+const char *
+get_version(void)
+{
+ if (the_tor_version == NULL) {
+ if (strlen(tor_git_revision)) {
+ tor_asprintf(&the_tor_version, "%s (git-%s)", get_short_version(),
+ tor_git_revision);
+ } else {
+ the_tor_version = tor_strdup(get_short_version());
+ }
+ }
+ return the_tor_version;
+}
+
+/** Return the current Tor version, without any git tag. */
+const char *
+get_short_version(void)
+{
+
+ if (the_short_tor_version == NULL) {
+#ifdef TOR_BUILD_TAG
+ tor_asprintf(&the_short_tor_version, "%s (%s)", VERSION, TOR_BUILD_TAG);
+#else
+ the_short_tor_version = tor_strdup(VERSION);
+#endif
+ }
+ return the_short_tor_version;
+}
+
+/** Release additional memory allocated in options
+ */
+STATIC void
+or_options_free_(or_options_t *options)
+{
+ if (!options)
+ return;
+
+ routerset_free(options->ExcludeExitNodesUnion_);
+ if (options->NodeFamilySets) {
+ SMARTLIST_FOREACH(options->NodeFamilySets, routerset_t *,
+ rs, routerset_free(rs));
+ smartlist_free(options->NodeFamilySets);
+ }
+ if (options->SchedulerTypes_) {
+ SMARTLIST_FOREACH(options->SchedulerTypes_, int *, i, tor_free(i));
+ smartlist_free(options->SchedulerTypes_);
+ }
+ if (options->FilesOpenedByIncludes) {
+ SMARTLIST_FOREACH(options->FilesOpenedByIncludes, char *, f, tor_free(f));
+ smartlist_free(options->FilesOpenedByIncludes);
+ }
+ tor_free(options->DataDirectory);
+ tor_free(options->CacheDirectory);
+ tor_free(options->KeyDirectory);
+ tor_free(options->BridgePassword_AuthDigest_);
+ tor_free(options->command_arg);
+ tor_free(options->master_key_fname);
+ config_free_lines(options->MyFamily);
+ config_free(&options_format, options);
+}
+
+/** Release all memory and resources held by global configuration structures.
+ */
+void
+config_free_all(void)
+{
+ or_options_free(global_options);
+ global_options = NULL;
+ or_options_free(global_default_options);
+ global_default_options = NULL;
+
+ config_free_lines(global_cmdline_options);
+ global_cmdline_options = NULL;
+
+ config_free_lines(global_cmdline_only_options);
+ global_cmdline_only_options = NULL;
+
+ if (configured_ports) {
+ SMARTLIST_FOREACH(configured_ports,
+ port_cfg_t *, p, port_cfg_free(p));
+ smartlist_free(configured_ports);
+ configured_ports = NULL;
+ }
+
+ tor_free(torrc_fname);
+ tor_free(torrc_defaults_fname);
+ tor_free(global_dirfrontpagecontents);
+
+ tor_free(the_short_tor_version);
+ tor_free(the_tor_version);
+
+ cleanup_protocol_warning_severity_level();
+
+ have_parsed_cmdline = 0;
+ libevent_initialized = 0;
+}
+
+/** Make <b>address</b> -- a piece of information related to our operation as
+ * a client -- safe to log according to the settings in options->SafeLogging,
+ * and return it.
+ *
+ * (We return "[scrubbed]" if SafeLogging is "1", and address otherwise.)
+ */
+const char *
+safe_str_client_opts(const or_options_t *options, const char *address)
+{
+ tor_assert(address);
+ if (!options) {
+ options = get_options();
+ }
+
+ if (options->SafeLogging_ == SAFELOG_SCRUB_ALL)
+ return "[scrubbed]";
+ else
+ return address;
+}
+
+/** Make <b>address</b> -- a piece of information of unspecified sensitivity
+ * -- safe to log according to the settings in options->SafeLogging, and
+ * return it.
+ *
+ * (We return "[scrubbed]" if SafeLogging is anything besides "0", and address
+ * otherwise.)
+ */
+const char *
+safe_str_opts(const or_options_t *options, const char *address)
+{
+ tor_assert(address);
+ if (!options) {
+ options = get_options();
+ }
+
+ if (options->SafeLogging_ != SAFELOG_SCRUB_NONE)
+ return "[scrubbed]";
+ else
+ return address;
+}
+
+/** Equivalent to escaped(safe_str_client(address)). See reentrancy note on
+ * escaped(): don't use this outside the main thread, or twice in the same
+ * log statement. */
+const char *
+escaped_safe_str_client(const char *address)
+{
+ if (get_options()->SafeLogging_ == SAFELOG_SCRUB_ALL)
+ return "[scrubbed]";
+ else
+ return escaped(address);
+}
+
+/** Equivalent to escaped(safe_str(address)). See reentrancy note on
+ * escaped(): don't use this outside the main thread, or twice in the same
+ * log statement. */
+const char *
+escaped_safe_str(const char *address)
+{
+ if (get_options()->SafeLogging_ != SAFELOG_SCRUB_NONE)
+ return "[scrubbed]";
+ else
+ return escaped(address);
+}
+
+/**
+ * The severity level that should be used for warnings of severity
+ * LOG_PROTOCOL_WARN.
+ *
+ * We keep this outside the options, and we use an atomic_counter_t, in case
+ * one thread needs to use LOG_PROTOCOL_WARN while an option transition is
+ * happening in the main thread.
+ */
+static atomic_counter_t protocol_warning_severity_level;
+
+/** Return the severity level that should be used for warnings of severity
+ * LOG_PROTOCOL_WARN. */
+int
+get_protocol_warning_severity_level(void)
+{
+ return (int) atomic_counter_get(&protocol_warning_severity_level);
+}
+
+/** Set the protocol warning severity level to <b>severity</b>. */
+static void
+set_protocol_warning_severity_level(int warning_severity)
+{
+ atomic_counter_exchange(&protocol_warning_severity_level,
+ warning_severity);
+}
+
+/**
+ * Initialize the log warning severity level for protocol warnings. Call
+ * only once at startup.
+ */
+void
+init_protocol_warning_severity_level(void)
+{
+ atomic_counter_init(&protocol_warning_severity_level);
+ set_protocol_warning_severity_level(LOG_WARN);
+}
+
+/**
+ * Tear down protocol_warning_severity_level.
+ */
+static void
+cleanup_protocol_warning_severity_level(void)
+{
+ atomic_counter_destroy(&protocol_warning_severity_level);
+}
+
+/** List of default directory authorities */
+
+static const char *default_authorities[] = {
+#include "auth_dirs.inc"
+ NULL
+};
+
+/** List of fallback directory authorities. The list is generated by opt-in of
+ * relays that meet certain stability criteria.
+ */
+static const char *default_fallbacks[] = {
+#include "fallback_dirs.inc"
+ NULL
+};
+
+/** Add the default directory authorities directly into the trusted dir list,
+ * but only add them insofar as they share bits with <b>type</b>.
+ * Each authority's bits are restricted to the bits shared with <b>type</b>.
+ * If <b>type</b> is ALL_DIRINFO or NO_DIRINFO (zero), add all authorities. */
+STATIC void
+add_default_trusted_dir_authorities(dirinfo_type_t type)
+{
+ int i;
+ for (i=0; default_authorities[i]; i++) {
+ if (parse_dir_authority_line(default_authorities[i], type, 0)<0) {
+ log_err(LD_BUG, "Couldn't parse internal DirAuthority line %s",
+ default_authorities[i]);
+ }
+ }
+}
+
+/** Add the default fallback directory servers into the fallback directory
+ * server list. */
+MOCK_IMPL(void,
+add_default_fallback_dir_servers,(void))
+{
+ int i;
+ for (i=0; default_fallbacks[i]; i++) {
+ if (parse_dir_fallback_line(default_fallbacks[i], 0)<0) {
+ log_err(LD_BUG, "Couldn't parse internal FallbackDir line %s",
+ default_fallbacks[i]);
+ }
+ }
+}
+
+/** Look at all the config options for using alternate directory
+ * authorities, and make sure none of them are broken. Also, warn the
+ * user if we changed any dangerous ones.
+ */
+static int
+validate_dir_servers(or_options_t *options, or_options_t *old_options)
+{
+ config_line_t *cl;
+
+ if (options->DirAuthorities &&
+ (options->AlternateDirAuthority || options->AlternateBridgeAuthority)) {
+ log_warn(LD_CONFIG,
+ "You cannot set both DirAuthority and Alternate*Authority.");
+ return -1;
+ }
+
+ /* do we want to complain to the user about being partitionable? */
+ if ((options->DirAuthorities &&
+ (!old_options ||
+ !config_lines_eq(options->DirAuthorities,
+ old_options->DirAuthorities))) ||
+ (options->AlternateDirAuthority &&
+ (!old_options ||
+ !config_lines_eq(options->AlternateDirAuthority,
+ old_options->AlternateDirAuthority)))) {
+ log_warn(LD_CONFIG,
+ "You have used DirAuthority or AlternateDirAuthority to "
+ "specify alternate directory authorities in "
+ "your configuration. This is potentially dangerous: it can "
+ "make you look different from all other Tor users, and hurt "
+ "your anonymity. Even if you've specified the same "
+ "authorities as Tor uses by default, the defaults could "
+ "change in the future. Be sure you know what you're doing.");
+ }
+
+ /* Now go through the four ways you can configure an alternate
+ * set of directory authorities, and make sure none are broken. */
+ for (cl = options->DirAuthorities; cl; cl = cl->next)
+ if (parse_dir_authority_line(cl->value, NO_DIRINFO, 1)<0)
+ return -1;
+ for (cl = options->AlternateBridgeAuthority; cl; cl = cl->next)
+ if (parse_dir_authority_line(cl->value, NO_DIRINFO, 1)<0)
+ return -1;
+ for (cl = options->AlternateDirAuthority; cl; cl = cl->next)
+ if (parse_dir_authority_line(cl->value, NO_DIRINFO, 1)<0)
+ return -1;
+ for (cl = options->FallbackDir; cl; cl = cl->next)
+ if (parse_dir_fallback_line(cl->value, 1)<0)
+ return -1;
+ return 0;
+}
+
+/** Look at all the config options and assign new dir authorities
+ * as appropriate.
+ */
+int
+consider_adding_dir_servers(const or_options_t *options,
+ const or_options_t *old_options)
+{
+ config_line_t *cl;
+ int need_to_update =
+ !smartlist_len(router_get_trusted_dir_servers()) ||
+ !smartlist_len(router_get_fallback_dir_servers()) || !old_options ||
+ !config_lines_eq(options->DirAuthorities, old_options->DirAuthorities) ||
+ !config_lines_eq(options->FallbackDir, old_options->FallbackDir) ||
+ (options->UseDefaultFallbackDirs != old_options->UseDefaultFallbackDirs) ||
+ !config_lines_eq(options->AlternateBridgeAuthority,
+ old_options->AlternateBridgeAuthority) ||
+ !config_lines_eq(options->AlternateDirAuthority,
+ old_options->AlternateDirAuthority);
+
+ if (!need_to_update)
+ return 0; /* all done */
+
+ /* "You cannot set both DirAuthority and Alternate*Authority."
+ * Checking that this restriction holds allows us to simplify
+ * the unit tests. */
+ tor_assert(!(options->DirAuthorities &&
+ (options->AlternateDirAuthority
+ || options->AlternateBridgeAuthority)));
+
+ /* Start from a clean slate. */
+ clear_dir_servers();
+
+ if (!options->DirAuthorities) {
+ /* then we may want some of the defaults */
+ dirinfo_type_t type = NO_DIRINFO;
+ if (!options->AlternateBridgeAuthority) {
+ type |= BRIDGE_DIRINFO;
+ }
+ if (!options->AlternateDirAuthority) {
+ type |= V3_DIRINFO | EXTRAINFO_DIRINFO | MICRODESC_DIRINFO;
+ /* Only add the default fallback directories when the DirAuthorities,
+ * AlternateDirAuthority, and FallbackDir directory config options
+ * are set to their defaults, and when UseDefaultFallbackDirs is 1. */
+ if (!options->FallbackDir && options->UseDefaultFallbackDirs) {
+ add_default_fallback_dir_servers();
+ }
+ }
+ /* if type == NO_DIRINFO, we don't want to add any of the
+ * default authorities, because we've replaced them all */
+ if (type != NO_DIRINFO)
+ add_default_trusted_dir_authorities(type);
+ }
+
+ for (cl = options->DirAuthorities; cl; cl = cl->next)
+ if (parse_dir_authority_line(cl->value, NO_DIRINFO, 0)<0)
+ return -1;
+ for (cl = options->AlternateBridgeAuthority; cl; cl = cl->next)
+ if (parse_dir_authority_line(cl->value, NO_DIRINFO, 0)<0)
+ return -1;
+ for (cl = options->AlternateDirAuthority; cl; cl = cl->next)
+ if (parse_dir_authority_line(cl->value, NO_DIRINFO, 0)<0)
+ return -1;
+ for (cl = options->FallbackDir; cl; cl = cl->next)
+ if (parse_dir_fallback_line(cl->value, 0)<0)
+ return -1;
+ return 0;
+}
+
+/**
+ * Make sure that <b>directory</b> exists, with appropriate ownership and
+ * permissions (as modified by <b>group_readable</b>). If <b>create</b>,
+ * create the directory if it is missing. Return 0 on success.
+ * On failure, return -1 and set *<b>msg_out</b>.
+ */
+static int
+check_and_create_data_directory(int create,
+ const char *directory,
+ int group_readable,
+ const char *owner,
+ char **msg_out)
+{
+ cpd_check_t cpd_opts = create ? CPD_CREATE : CPD_CHECK;
+ if (group_readable)
+ cpd_opts |= CPD_GROUP_READ;
+ if (check_private_dir(directory,
+ cpd_opts,
+ owner) < 0) {
+ tor_asprintf(msg_out,
+ "Couldn't %s private data directory \"%s\"",
+ create ? "create" : "access",
+ directory);
+ return -1;
+ }
+
+#ifndef _WIN32
+ if (group_readable) {
+ /* Only new dirs created get new opts, also enforce group read. */
+ if (chmod(directory, 0750)) {
+ log_warn(LD_FS,"Unable to make %s group-readable: %s",
+ directory, strerror(errno));
+ }
+ }
+#endif /* !defined(_WIN32) */
+
+ return 0;
+}
+
+/**
+ * Ensure that our keys directory exists, with appropriate permissions.
+ * Return 0 on success, -1 on failure.
+ */
+int
+create_keys_directory(const or_options_t *options)
+{
+ /* Make sure DataDirectory exists, and is private. */
+ cpd_check_t cpd_opts = CPD_CREATE;
+ if (options->DataDirectoryGroupReadable)
+ cpd_opts |= CPD_GROUP_READ;
+ if (check_private_dir(options->DataDirectory, cpd_opts, options->User)) {
+ log_err(LD_OR, "Can't create/check datadirectory %s",
+ options->DataDirectory);
+ return -1;
+ }
+
+ /* Check the key directory. */
+ if (check_private_dir(options->KeyDirectory, CPD_CREATE, options->User)) {
+ return -1;
+ }
+ return 0;
+}
+
+/* Helps determine flags to pass to switch_id. */
+static int have_low_ports = -1;
+
+/** Fetch the active option list, and take actions based on it. All of the
+ * things we do should survive being done repeatedly. If present,
+ * <b>old_options</b> contains the previous value of the options.
+ *
+ * Return 0 if all goes well, return -1 if things went badly.
+ */
+static int
+options_act_reversible(const or_options_t *old_options, char **msg)
+{
+ smartlist_t *new_listeners = smartlist_new();
+ or_options_t *options = get_options_mutable();
+ int running_tor = options->command == CMD_RUN_TOR;
+ int set_conn_limit = 0;
+ int r = -1;
+ int logs_marked = 0, logs_initialized = 0;
+ int old_min_log_level = get_min_log_level();
+
+ /* Daemonize _first_, since we only want to open most of this stuff in
+ * the subprocess. Libevent bases can't be reliably inherited across
+ * processes. */
+ if (running_tor && options->RunAsDaemon) {
+ if (! start_daemon_has_been_called())
+ crypto_prefork();
+ /* No need to roll back, since you can't change the value. */
+ if (start_daemon())
+ crypto_postfork();
+ }
+
+#ifdef HAVE_SYSTEMD
+ /* Our PID may have changed, inform supervisor */
+ sd_notifyf(0, "MAINPID=%ld\n", (long int)getpid());
+#endif
+
+#ifndef HAVE_SYS_UN_H
+ if (options->ControlSocket || options->ControlSocketsGroupWritable) {
+ *msg = tor_strdup("Unix domain sockets (ControlSocket) not supported "
+ "on this OS/with this build.");
+ goto rollback;
+ }
+#else /* !(!defined(HAVE_SYS_UN_H)) */
+ if (options->ControlSocketsGroupWritable && !options->ControlSocket) {
+ *msg = tor_strdup("Setting ControlSocketGroupWritable without setting"
+ "a ControlSocket makes no sense.");
+ goto rollback;
+ }
+#endif /* !defined(HAVE_SYS_UN_H) */
+
+ if (running_tor) {
+ int n_ports=0;
+ /* We need to set the connection limit before we can open the listeners. */
+ if (! sandbox_is_active()) {
+ if (set_max_file_descriptors((unsigned)options->ConnLimit,
+ &options->ConnLimit_) < 0) {
+ *msg = tor_strdup("Problem with ConnLimit value. "
+ "See logs for details.");
+ goto rollback;
+ }
+ set_conn_limit = 1;
+ } else {
+ tor_assert(old_options);
+ options->ConnLimit_ = old_options->ConnLimit_;
+ }
+
+ /* Set up libevent. (We need to do this before we can register the
+ * listeners as listeners.) */
+ if (running_tor && !libevent_initialized) {
+ init_libevent(options);
+ libevent_initialized = 1;
+
+ /* This has to come up after libevent is initialized. */
+ control_initialize_event_queue();
+
+ /*
+ * Initialize the scheduler - this has to come after
+ * options_init_from_torrc() sets up libevent - why yes, that seems
+ * completely sensible to hide the libevent setup in the option parsing
+ * code! It also needs to happen before init_keys(), so it needs to
+ * happen here too. How yucky. */
+ scheduler_init();
+ }
+
+ /* Adjust the port configuration so we can launch listeners. */
+ if (parse_ports(options, 0, msg, &n_ports, NULL)) {
+ if (!*msg)
+ *msg = tor_strdup("Unexpected problem parsing port config");
+ goto rollback;
+ }
+
+ /* Set the hibernation state appropriately.*/
+ consider_hibernation(time(NULL));
+
+ /* Launch the listeners. (We do this before we setuid, so we can bind to
+ * ports under 1024.) We don't want to rebind if we're hibernating or
+ * shutting down. If networking is disabled, this will close all but the
+ * control listeners, but disable those. */
+ if (!we_are_hibernating()) {
+ if (retry_all_listeners(new_listeners, options->DisableNetwork) < 0) {
+ *msg = tor_strdup("Failed to bind one of the listener ports.");
+ goto rollback;
+ }
+ }
+ if (options->DisableNetwork) {
+ /* Aggressively close non-controller stuff, NOW */
+ log_notice(LD_NET, "DisableNetwork is set. Tor will not make or accept "
+ "non-control network connections. Shutting down all existing "
+ "connections.");
+ connection_mark_all_noncontrol_connections();
+ /* We can't complete circuits until the network is re-enabled. */
+ note_that_we_maybe_cant_complete_circuits();
+ }
+ }
+
+#if defined(HAVE_NET_IF_H) && defined(HAVE_NET_PFVAR_H)
+ /* Open /dev/pf before dropping privileges. */
+ if (options->TransPort_set &&
+ options->TransProxyType_parsed == TPT_DEFAULT) {
+ if (get_pf_socket() < 0) {
+ *msg = tor_strdup("Unable to open /dev/pf for transparent proxy.");
+ goto rollback;
+ }
+ }
+#endif /* defined(HAVE_NET_IF_H) && defined(HAVE_NET_PFVAR_H) */
+
+ /* Attempt to lock all current and future memory with mlockall() only once */
+ if (options->DisableAllSwap) {
+ if (tor_mlockall() == -1) {
+ *msg = tor_strdup("DisableAllSwap failure. Do you have proper "
+ "permissions?");
+ goto done;
+ }
+ }
+
+ /* Setuid/setgid as appropriate */
+ if (options->User) {
+ tor_assert(have_low_ports != -1);
+ unsigned switch_id_flags = 0;
+ if (options->KeepBindCapabilities == 1) {
+ switch_id_flags |= SWITCH_ID_KEEP_BINDLOW;
+ switch_id_flags |= SWITCH_ID_WARN_IF_NO_CAPS;
+ }
+ if (options->KeepBindCapabilities == -1 && have_low_ports) {
+ switch_id_flags |= SWITCH_ID_KEEP_BINDLOW;
+ }
+ if (switch_id(options->User, switch_id_flags) != 0) {
+ /* No need to roll back, since you can't change the value. */
+ *msg = tor_strdup("Problem with User value. See logs for details.");
+ goto done;
+ }
+ }
+
+ /* Ensure data directory is private; create if possible. */
+ /* It's okay to do this in "options_act_reversible()" even though it isn't
+ * actually reversible, since you can't change the DataDirectory while
+ * Tor is running. */
+ if (check_and_create_data_directory(running_tor /* create */,
+ options->DataDirectory,
+ options->DataDirectoryGroupReadable,
+ options->User,
+ msg) < 0) {
+ goto done;
+ }
+ if (check_and_create_data_directory(running_tor /* create */,
+ options->KeyDirectory,
+ options->KeyDirectoryGroupReadable,
+ options->User,
+ msg) < 0) {
+ goto done;
+ }
+
+ /* We need to handle the group-readable flag for the cache directory
+ * specially, since the directory defaults to being the same as the
+ * DataDirectory. */
+ int cache_dir_group_readable;
+ if (options->CacheDirectoryGroupReadable != -1) {
+ /* If the user specified a value, use their setting */
+ cache_dir_group_readable = options->CacheDirectoryGroupReadable;
+ } else if (!strcmp(options->CacheDirectory, options->DataDirectory)) {
+ /* If the user left the value as "auto", and the cache is the same as the
+ * datadirectory, use the datadirectory setting.
+ */
+ cache_dir_group_readable = options->DataDirectoryGroupReadable;
+ } else {
+ /* Otherwise, "auto" means "not group readable". */
+ cache_dir_group_readable = 0;
+ }
+ if (check_and_create_data_directory(running_tor /* create */,
+ options->CacheDirectory,
+ cache_dir_group_readable,
+ options->User,
+ msg) < 0) {
+ goto done;
+ }
+
+ /* Bail out at this point if we're not going to be a client or server:
+ * we don't run Tor itself. */
+ if (!running_tor)
+ goto commit;
+
+ mark_logs_temp(); /* Close current logs once new logs are open. */
+ logs_marked = 1;
+ /* Configure the tor_log(s) */
+ if (options_init_logs(old_options, options, 0)<0) {
+ *msg = tor_strdup("Failed to init Log options. See logs for details.");
+ goto rollback;
+ }
+ logs_initialized = 1;
+
+ commit:
+ r = 0;
+ if (logs_marked) {
+ log_severity_list_t *severity =
+ tor_malloc_zero(sizeof(log_severity_list_t));
+ close_temp_logs();
+ add_callback_log(severity, control_event_logmsg);
+ logs_set_pending_callback_callback(control_event_logmsg_pending);
+ control_adjust_event_log_severity();
+ tor_free(severity);
+ tor_log_update_sigsafe_err_fds();
+ }
+ if (logs_initialized) {
+ flush_log_messages_from_startup();
+ }
+
+ {
+ const char *badness = NULL;
+ int bad_safelog = 0, bad_severity = 0, new_badness = 0;
+ if (options->SafeLogging_ != SAFELOG_SCRUB_ALL) {
+ bad_safelog = 1;
+ if (!old_options || old_options->SafeLogging_ != options->SafeLogging_)
+ new_badness = 1;
+ }
+ if (get_min_log_level() >= LOG_INFO) {
+ bad_severity = 1;
+ if (get_min_log_level() != old_min_log_level)
+ new_badness = 1;
+ }
+ if (bad_safelog && bad_severity)
+ badness = "you disabled SafeLogging, and "
+ "you're logging more than \"notice\"";
+ else if (bad_safelog)
+ badness = "you disabled SafeLogging";
+ else
+ badness = "you're logging more than \"notice\"";
+ if (new_badness)
+ log_warn(LD_GENERAL, "Your log may contain sensitive information - %s. "
+ "Don't log unless it serves an important reason. "
+ "Overwrite the log afterwards.", badness);
+ }
+
+ if (set_conn_limit) {
+ /*
+ * If we adjusted the conn limit, recompute the OOS threshold too
+ *
+ * How many possible sockets to keep in reserve? If we have lots of
+ * possible sockets, keep this below a limit and set ConnLimit_high_thresh
+ * very close to ConnLimit_, but if ConnLimit_ is low, shrink it in
+ * proportion.
+ *
+ * Somewhat arbitrarily, set socks_in_reserve to 5% of ConnLimit_, but
+ * cap it at 64.
+ */
+ int socks_in_reserve = options->ConnLimit_ / 20;
+ if (socks_in_reserve > 64) socks_in_reserve = 64;
+
+ options->ConnLimit_high_thresh = options->ConnLimit_ - socks_in_reserve;
+ options->ConnLimit_low_thresh = (options->ConnLimit_ / 4) * 3;
+ log_info(LD_GENERAL,
+ "Recomputed OOS thresholds: ConnLimit %d, ConnLimit_ %d, "
+ "ConnLimit_high_thresh %d, ConnLimit_low_thresh %d",
+ options->ConnLimit, options->ConnLimit_,
+ options->ConnLimit_high_thresh,
+ options->ConnLimit_low_thresh);
+
+ /* Give the OOS handler a chance with the new thresholds */
+ connection_check_oos(get_n_open_sockets(), 0);
+ }
+
+ goto done;
+
+ rollback:
+ r = -1;
+ tor_assert(*msg);
+
+ if (logs_marked) {
+ rollback_log_changes();
+ control_adjust_event_log_severity();
+ }
+
+ if (set_conn_limit && old_options)
+ set_max_file_descriptors((unsigned)old_options->ConnLimit,
+ &options->ConnLimit_);
+
+ SMARTLIST_FOREACH(new_listeners, connection_t *, conn,
+ {
+ log_notice(LD_NET, "Closing partially-constructed %s on %s:%d",
+ conn_type_to_string(conn->type), conn->address, conn->port);
+ connection_close_immediate(conn);
+ connection_mark_for_close(conn);
+ });
+
+ done:
+ smartlist_free(new_listeners);
+ return r;
+}
+
+/** If we need to have a GEOIP ip-to-country map to run with our configured
+ * options, return 1 and set *<b>reason_out</b> to a description of why. */
+int
+options_need_geoip_info(const or_options_t *options, const char **reason_out)
+{
+ int bridge_usage = should_record_bridge_info(options);
+ int routerset_usage =
+ routerset_needs_geoip(options->EntryNodes) ||
+ routerset_needs_geoip(options->ExitNodes) ||
+ routerset_needs_geoip(options->ExcludeExitNodes) ||
+ routerset_needs_geoip(options->ExcludeNodes) ||
+ routerset_needs_geoip(options->HSLayer2Nodes) ||
+ routerset_needs_geoip(options->HSLayer3Nodes);
+
+ if (routerset_usage && reason_out) {
+ *reason_out = "We've been configured to use (or avoid) nodes in certain "
+ "countries, and we need GEOIP information to figure out which ones they "
+ "are.";
+ } else if (bridge_usage && reason_out) {
+ *reason_out = "We've been configured to see which countries can access "
+ "us as a bridge, and we need GEOIP information to tell which countries "
+ "clients are in.";
+ }
+ return bridge_usage || routerset_usage;
+}
+
+/** Return the bandwidthrate that we are going to report to the authorities
+ * based on the config options. */
+uint32_t
+get_effective_bwrate(const or_options_t *options)
+{
+ uint64_t bw = options->BandwidthRate;
+ if (bw > options->MaxAdvertisedBandwidth)
+ bw = options->MaxAdvertisedBandwidth;
+ if (options->RelayBandwidthRate > 0 && bw > options->RelayBandwidthRate)
+ bw = options->RelayBandwidthRate;
+ /* ensure_bandwidth_cap() makes sure that this cast can't overflow. */
+ return (uint32_t)bw;
+}
+
+/** Return the bandwidthburst that we are going to report to the authorities
+ * based on the config options. */
+uint32_t
+get_effective_bwburst(const or_options_t *options)
+{
+ uint64_t bw = options->BandwidthBurst;
+ if (options->RelayBandwidthBurst > 0 && bw > options->RelayBandwidthBurst)
+ bw = options->RelayBandwidthBurst;
+ /* ensure_bandwidth_cap() makes sure that this cast can't overflow. */
+ return (uint32_t)bw;
+}
+
+/* Used in the various options_transition_affects* functions. */
+#define YES_IF_CHANGED_BOOL(opt) \
+ if (!CFG_EQ_BOOL(old_options, new_options, opt)) return 1;
+#define YES_IF_CHANGED_INT(opt) \
+ if (!CFG_EQ_INT(old_options, new_options, opt)) return 1;
+#define YES_IF_CHANGED_STRING(opt) \
+ if (!CFG_EQ_STRING(old_options, new_options, opt)) return 1;
+#define YES_IF_CHANGED_LINELIST(opt) \
+ if (!CFG_EQ_LINELIST(old_options, new_options, opt)) return 1;
+#define YES_IF_CHANGED_SMARTLIST(opt) \
+ if (!CFG_EQ_SMARTLIST(old_options, new_options, opt)) return 1;
+#define YES_IF_CHANGED_ROUTERSET(opt) \
+ if (!CFG_EQ_ROUTERSET(old_options, new_options, opt)) return 1;
+
+/**
+ * Return true if changing the configuration from <b>old</b> to <b>new</b>
+ * affects the guard subsystem.
+ */
+static int
+options_transition_affects_guards(const or_options_t *old_options,
+ const or_options_t *new_options)
+{
+ /* NOTE: Make sure this function stays in sync with
+ * node_passes_guard_filter */
+ tor_assert(old_options);
+ tor_assert(new_options);
+
+ YES_IF_CHANGED_BOOL(UseEntryGuards);
+ YES_IF_CHANGED_BOOL(UseBridges);
+ YES_IF_CHANGED_BOOL(ClientUseIPv4);
+ YES_IF_CHANGED_BOOL(ClientUseIPv6);
+ YES_IF_CHANGED_BOOL(FascistFirewall);
+ YES_IF_CHANGED_ROUTERSET(ExcludeNodes);
+ YES_IF_CHANGED_ROUTERSET(EntryNodes);
+ YES_IF_CHANGED_SMARTLIST(FirewallPorts);
+ YES_IF_CHANGED_LINELIST(Bridges);
+ YES_IF_CHANGED_LINELIST(ReachableORAddresses);
+ YES_IF_CHANGED_LINELIST(ReachableDirAddresses);
+
+ return 0;
+}
+
+/**
+ * Return true if changing the configuration from <b>old</b> to <b>new</b>
+ * affects the timing of the voting subsystem
+ */
+static int
+options_transition_affects_dirauth_timing(const or_options_t *old_options,
+ const or_options_t *new_options)
+{
+ tor_assert(old_options);
+ tor_assert(new_options);
+
+ if (authdir_mode_v3(old_options) != authdir_mode_v3(new_options))
+ return 1;
+ if (! authdir_mode_v3(new_options))
+ return 0;
+ YES_IF_CHANGED_INT(V3AuthVotingInterval);
+ YES_IF_CHANGED_INT(V3AuthVoteDelay);
+ YES_IF_CHANGED_INT(V3AuthDistDelay);
+ YES_IF_CHANGED_INT(TestingV3AuthInitialVotingInterval);
+ YES_IF_CHANGED_INT(TestingV3AuthInitialVoteDelay);
+ YES_IF_CHANGED_INT(TestingV3AuthInitialDistDelay);
+ YES_IF_CHANGED_INT(TestingV3AuthVotingStartOffset);
+
+ return 0;
+}
+
+/** Fetch the active option list, and take actions based on it. All of the
+ * things we do should survive being done repeatedly. If present,
+ * <b>old_options</b> contains the previous value of the options.
+ *
+ * Return 0 if all goes well, return -1 if it's time to die.
+ *
+ * Note: We haven't moved all the "act on new configuration" logic
+ * here yet. Some is still in do_hup() and other places.
+ */
+STATIC int
+options_act(const or_options_t *old_options)
+{
+ config_line_t *cl;
+ or_options_t *options = get_options_mutable();
+ int running_tor = options->command == CMD_RUN_TOR;
+ char *msg=NULL;
+ const int transition_affects_workers =
+ old_options && options_transition_affects_workers(old_options, options);
+ const int transition_affects_guards =
+ old_options && options_transition_affects_guards(old_options, options);
+
+ if (options->NoExec || options->Sandbox) {
+ tor_disable_spawning_background_processes();
+ }
+
+ /* disable ptrace and later, other basic debugging techniques */
+ {
+ /* Remember if we already disabled debugger attachment */
+ static int disabled_debugger_attach = 0;
+ /* Remember if we already warned about being configured not to disable
+ * debugger attachment */
+ static int warned_debugger_attach = 0;
+ /* Don't disable debugger attachment when we're running the unit tests. */
+ if (options->DisableDebuggerAttachment && !disabled_debugger_attach &&
+ running_tor) {
+ int ok = tor_disable_debugger_attach();
+ /* LCOV_EXCL_START the warned_debugger_attach is 0 can't reach inside. */
+ if (warned_debugger_attach && ok == 1) {
+ log_notice(LD_CONFIG, "Disabled attaching debuggers for unprivileged "
+ "users.");
+ }
+ /* LCOV_EXCL_STOP */
+ disabled_debugger_attach = (ok == 1);
+ } else if (!options->DisableDebuggerAttachment &&
+ !warned_debugger_attach) {
+ log_notice(LD_CONFIG, "Not disabling debugger attaching for "
+ "unprivileged users.");
+ warned_debugger_attach = 1;
+ }
+ }
+
+ /* Write control ports to disk as appropriate */
+ control_ports_write_to_file();
+
+ if (running_tor && !have_lockfile()) {
+ if (try_locking(options, 1) < 0)
+ return -1;
+ }
+
+ {
+ int warning_severity = options->ProtocolWarnings ? LOG_WARN : LOG_INFO;
+ set_protocol_warning_severity_level(warning_severity);
+ }
+
+ if (consider_adding_dir_servers(options, old_options) < 0) {
+ // XXXX This should get validated earlier, and committed here, to
+ // XXXX lower opportunities for reaching an error case.
+ return -1;
+ }
+
+ if (rend_non_anonymous_mode_enabled(options)) {
+ log_warn(LD_GENERAL, "This copy of Tor was compiled or configured to run "
+ "in a non-anonymous mode. It will provide NO ANONYMITY.");
+ }
+
+ /* If we are a bridge with a pluggable transport proxy but no
+ Extended ORPort, inform the user that they are missing out. */
+ if (server_mode(options) && options->ServerTransportPlugin &&
+ !options->ExtORPort_lines) {
+ log_notice(LD_CONFIG, "We use pluggable transports but the Extended "
+ "ORPort is disabled. Tor and your pluggable transports proxy "
+ "communicate with each other via the Extended ORPort so it "
+ "is suggested you enable it: it will also allow your Bridge "
+ "to collect statistics about its clients that use pluggable "
+ "transports. Please enable it using the ExtORPort torrc option "
+ "(e.g. set 'ExtORPort auto').");
+ }
+
+ if (options->Bridges) {
+ mark_bridge_list();
+ for (cl = options->Bridges; cl; cl = cl->next) {
+ bridge_line_t *bridge_line = parse_bridge_line(cl->value);
+ if (!bridge_line) {
+ // LCOV_EXCL_START
+ log_warn(LD_BUG,
+ "Previously validated Bridge line could not be added!");
+ return -1;
+ // LCOV_EXCL_STOP
+ }
+ bridge_add_from_config(bridge_line);
+ }
+ sweep_bridge_list();
+ }
+
+ if (running_tor && hs_config_service_all(options, 0)<0) {
+ // LCOV_EXCL_START
+ log_warn(LD_BUG,
+ "Previously validated hidden services line could not be added!");
+ return -1;
+ // LCOV_EXCL_STOP
+ }
+
+ if (running_tor && hs_config_client_auth_all(options, 0) < 0) {
+ // LCOV_EXCL_START
+ log_warn(LD_BUG, "Previously validated client authorization for "
+ "hidden services could not be added!");
+ return -1;
+ // LCOV_EXCL_STOP
+ }
+
+ if (running_tor && !old_options &&
+ options->OwningControllerFD != UINT64_MAX) {
+ const unsigned ctrl_flags =
+ CC_LOCAL_FD_IS_OWNER |
+ CC_LOCAL_FD_IS_AUTHENTICATED;
+ tor_socket_t ctrl_sock = (tor_socket_t)options->OwningControllerFD;
+ if (control_connection_add_local_fd(ctrl_sock, ctrl_flags) < 0) {
+ log_warn(LD_CONFIG, "Could not add local controller connection with "
+ "given FD.");
+ return -1;
+ }
+ }
+
+ /* Load state */
+ if (! or_state_loaded() && running_tor) {
+ if (or_state_load())
+ return -1;
+ rep_hist_load_mtbf_data(time(NULL));
+ }
+
+ /* If we have an ExtORPort, initialize its auth cookie. */
+ if (running_tor &&
+ init_ext_or_cookie_authentication(!!options->ExtORPort_lines) < 0) {
+ log_warn(LD_CONFIG,"Error creating Extended ORPort cookie file.");
+ return -1;
+ }
+
+ mark_transport_list();
+ pt_prepare_proxy_list_for_config_read();
+ if (!options->DisableNetwork) {
+ if (options->ClientTransportPlugin) {
+ for (cl = options->ClientTransportPlugin; cl; cl = cl->next) {
+ if (parse_transport_line(options, cl->value, 0, 0) < 0) {
+ // LCOV_EXCL_START
+ log_warn(LD_BUG,
+ "Previously validated ClientTransportPlugin line "
+ "could not be added!");
+ return -1;
+ // LCOV_EXCL_STOP
+ }
+ }
+ }
+
+ if (options->ServerTransportPlugin && server_mode(options)) {
+ for (cl = options->ServerTransportPlugin; cl; cl = cl->next) {
+ if (parse_transport_line(options, cl->value, 0, 1) < 0) {
+ // LCOV_EXCL_START
+ log_warn(LD_BUG,
+ "Previously validated ServerTransportPlugin line "
+ "could not be added!");
+ return -1;
+ // LCOV_EXCL_STOP
+ }
+ }
+ }
+ }
+ sweep_transport_list();
+ sweep_proxy_list();
+
+ /* Start the PT proxy configuration. By doing this configuration
+ here, we also figure out which proxies need to be restarted and
+ which not. */
+ if (pt_proxies_configuration_pending() && !net_is_disabled())
+ pt_configure_remaining_proxies();
+
+ /* Bail out at this point if we're not going to be a client or server:
+ * we want to not fork, and to log stuff to stderr. */
+ if (!running_tor)
+ return 0;
+
+ /* Finish backgrounding the process */
+ if (options->RunAsDaemon) {
+ /* We may be calling this for the n'th time (on SIGHUP), but it's safe. */
+ finish_daemon(options->DataDirectory);
+ }
+
+ /* See whether we need to enable/disable our once-a-second timer. */
+ reschedule_per_second_timer();
+
+ /* We want to reinit keys as needed before we do much of anything else:
+ keys are important, and other things can depend on them. */
+ if (transition_affects_workers ||
+ (options->V3AuthoritativeDir && (!old_options ||
+ !old_options->V3AuthoritativeDir))) {
+ if (init_keys() < 0) {
+ log_warn(LD_BUG,"Error initializing keys; exiting");
+ return -1;
+ }
+ }
+
+ /* Write our PID to the PID file. If we do not have write permissions we
+ * will log a warning and exit. */
+ if (options->PidFile && !sandbox_is_active()) {
+ if (write_pidfile(options->PidFile) < 0) {
+ log_err(LD_CONFIG, "Unable to write PIDFile %s",
+ escaped(options->PidFile));
+ return -1;
+ }
+ }
+
+ /* Register addressmap directives */
+ config_register_addressmaps(options);
+ parse_virtual_addr_network(options->VirtualAddrNetworkIPv4, AF_INET,0,NULL);
+ parse_virtual_addr_network(options->VirtualAddrNetworkIPv6, AF_INET6,0,NULL);
+
+ /* Update address policies. */
+ if (policies_parse_from_options(options) < 0) {
+ /* This should be impossible, but let's be sure. */
+ log_warn(LD_BUG,"Error parsing already-validated policy options.");
+ return -1;
+ }
+
+ if (server_mode(options)) {
+ static int cdm_initialized = 0;
+ if (cdm_initialized == 0) {
+ cdm_initialized = 1;
+ consdiffmgr_configure(NULL);
+ consdiffmgr_validate();
+ }
+ }
+
+ if (init_control_cookie_authentication(options->CookieAuthentication) < 0) {
+ log_warn(LD_CONFIG,"Error creating control cookie authentication file.");
+ return -1;
+ }
+
+ monitor_owning_controller_process(options->OwningControllerProcess);
+
+ /* reload keys as needed for rendezvous services. */
+ if (hs_service_load_all_keys() < 0) {
+ log_warn(LD_GENERAL,"Error loading rendezvous service keys");
+ return -1;
+ }
+
+ /* Inform the scheduler subsystem that a configuration changed happened. It
+ * might be a change of scheduler or parameter. */
+ scheduler_conf_changed();
+
+ /* Set up accounting */
+ if (accounting_parse_options(options, 0)<0) {
+ // LCOV_EXCL_START
+ log_warn(LD_BUG,"Error in previously validated accounting options");
+ return -1;
+ // LCOV_EXCL_STOP
+ }
+ if (accounting_is_enabled(options))
+ configure_accounting(time(NULL));
+
+ /* Change the cell EWMA settings */
+ cmux_ewma_set_options(options, networkstatus_get_latest_consensus());
+
+ /* Update the BridgePassword's hashed version as needed. We store this as a
+ * digest so that we can do side-channel-proof comparisons on it.
+ */
+ if (options->BridgePassword) {
+ char *http_authenticator;
+ http_authenticator = alloc_http_authenticator(options->BridgePassword);
+ if (!http_authenticator) {
+ // XXXX This should get validated in options_validate().
+ log_warn(LD_BUG, "Unable to allocate HTTP authenticator. Not setting "
+ "BridgePassword.");
+ return -1;
+ }
+ options->BridgePassword_AuthDigest_ = tor_malloc(DIGEST256_LEN);
+ crypto_digest256(options->BridgePassword_AuthDigest_,
+ http_authenticator, strlen(http_authenticator),
+ DIGEST_SHA256);
+ tor_free(http_authenticator);
+ }
+
+ if (parse_outbound_addresses(options, 0, &msg) < 0) {
+ // LCOV_EXCL_START
+ log_warn(LD_BUG, "Failed parsing previously validated outbound "
+ "bind addresses: %s", msg);
+ tor_free(msg);
+ return -1;
+ // LCOV_EXCL_STOP
+ }
+
+ config_maybe_load_geoip_files_(options, old_options);
+
+ if (geoip_is_loaded(AF_INET) && options->GeoIPExcludeUnknown) {
+ /* ExcludeUnknown is true or "auto" */
+ const int is_auto = options->GeoIPExcludeUnknown == -1;
+ int changed;
+
+ changed = routerset_add_unknown_ccs(&options->ExcludeNodes, is_auto);
+ changed += routerset_add_unknown_ccs(&options->ExcludeExitNodes, is_auto);
+
+ if (changed)
+ routerset_add_unknown_ccs(&options->ExcludeExitNodesUnion_, is_auto);
+ }
+
+ /* Check for transitions that need action. */
+ if (old_options) {
+ int revise_trackexithosts = 0;
+ int revise_automap_entries = 0;
+ int abandon_circuits = 0;
+ if ((options->UseEntryGuards && !old_options->UseEntryGuards) ||
+ options->UseBridges != old_options->UseBridges ||
+ (options->UseBridges &&
+ !config_lines_eq(options->Bridges, old_options->Bridges)) ||
+ !routerset_equal(old_options->ExcludeNodes,options->ExcludeNodes) ||
+ !routerset_equal(old_options->ExcludeExitNodes,
+ options->ExcludeExitNodes) ||
+ !routerset_equal(old_options->EntryNodes, options->EntryNodes) ||
+ !routerset_equal(old_options->ExitNodes, options->ExitNodes) ||
+ !routerset_equal(old_options->HSLayer2Nodes,
+ options->HSLayer2Nodes) ||
+ !routerset_equal(old_options->HSLayer3Nodes,
+ options->HSLayer3Nodes) ||
+ options->StrictNodes != old_options->StrictNodes) {
+ log_info(LD_CIRC,
+ "Changed to using entry guards or bridges, or changed "
+ "preferred or excluded node lists. "
+ "Abandoning previous circuits.");
+ abandon_circuits = 1;
+ }
+
+ if (transition_affects_guards) {
+ if (guards_update_all()) {
+ abandon_circuits = 1;
+ }
+ }
+
+ if (abandon_circuits) {
+ circuit_mark_all_unused_circs();
+ circuit_mark_all_dirty_circs_as_unusable();
+ revise_trackexithosts = 1;
+ }
+
+ if (!smartlist_strings_eq(old_options->TrackHostExits,
+ options->TrackHostExits))
+ revise_trackexithosts = 1;
+
+ if (revise_trackexithosts)
+ addressmap_clear_excluded_trackexithosts(options);
+
+ if (!options->AutomapHostsOnResolve &&
+ old_options->AutomapHostsOnResolve) {
+ revise_automap_entries = 1;
+ } else {
+ if (!smartlist_strings_eq(old_options->AutomapHostsSuffixes,
+ options->AutomapHostsSuffixes))
+ revise_automap_entries = 1;
+ else if (!opt_streq(old_options->VirtualAddrNetworkIPv4,
+ options->VirtualAddrNetworkIPv4) ||
+ !opt_streq(old_options->VirtualAddrNetworkIPv6,
+ options->VirtualAddrNetworkIPv6))
+ revise_automap_entries = 1;
+ }
+
+ if (revise_automap_entries)
+ addressmap_clear_invalid_automaps(options);
+
+/* How long should we delay counting bridge stats after becoming a bridge?
+ * We use this so we don't count clients who used our bridge thinking it is
+ * a relay. If you change this, don't forget to change the log message
+ * below. It's 4 hours (the time it takes to stop being used by clients)
+ * plus some extra time for clock skew. */
+#define RELAY_BRIDGE_STATS_DELAY (6 * 60 * 60)
+
+ if (! bool_eq(options->BridgeRelay, old_options->BridgeRelay)) {
+ int was_relay = 0;
+ if (options->BridgeRelay) {
+ time_t int_start = time(NULL);
+ if (config_lines_eq(old_options->ORPort_lines,options->ORPort_lines)) {
+ int_start += RELAY_BRIDGE_STATS_DELAY;
+ was_relay = 1;
+ }
+ geoip_bridge_stats_init(int_start);
+ log_info(LD_CONFIG, "We are acting as a bridge now. Starting new "
+ "GeoIP stats interval%s.", was_relay ? " in 6 "
+ "hours from now" : "");
+ } else {
+ geoip_bridge_stats_term();
+ log_info(LD_GENERAL, "We are no longer acting as a bridge. "
+ "Forgetting GeoIP stats.");
+ }
+ }
+
+ if (transition_affects_workers) {
+ log_info(LD_GENERAL,
+ "Worker-related options changed. Rotating workers.");
+ const int server_mode_turned_on =
+ server_mode(options) && !server_mode(old_options);
+ const int dir_server_mode_turned_on =
+ dir_server_mode(options) && !dir_server_mode(old_options);
+
+ if (server_mode_turned_on || dir_server_mode_turned_on) {
+ cpu_init();
+ }
+
+ if (server_mode_turned_on) {
+ ip_address_changed(0);
+ if (have_completed_a_circuit() || !any_predicted_circuits(time(NULL)))
+ inform_testing_reachability();
+ }
+ cpuworkers_rotate_keyinfo();
+ if (dns_reset())
+ return -1;
+ } else {
+ if (dns_reset())
+ return -1;
+ }
+
+ if (options->PerConnBWRate != old_options->PerConnBWRate ||
+ options->PerConnBWBurst != old_options->PerConnBWBurst)
+ connection_or_update_token_buckets(get_connection_array(), options);
+
+ if (options->BandwidthRate != old_options->BandwidthRate ||
+ options->BandwidthBurst != old_options->BandwidthBurst ||
+ options->RelayBandwidthRate != old_options->RelayBandwidthRate ||
+ options->RelayBandwidthBurst != old_options->RelayBandwidthBurst)
+ connection_bucket_adjust(options);
+
+ if (options->MainloopStats != old_options->MainloopStats) {
+ reset_main_loop_counters();
+ }
+ }
+
+ /* Only collect directory-request statistics on relays and bridges. */
+ options->DirReqStatistics = options->DirReqStatistics_option &&
+ server_mode(options);
+ options->HiddenServiceStatistics =
+ options->HiddenServiceStatistics_option && server_mode(options);
+
+ if (options->CellStatistics || options->DirReqStatistics ||
+ options->EntryStatistics || options->ExitPortStatistics ||
+ options->ConnDirectionStatistics ||
+ options->HiddenServiceStatistics ||
+ options->BridgeAuthoritativeDir) {
+ time_t now = time(NULL);
+ int print_notice = 0;
+
+ /* Only collect other relay-only statistics on relays. */
+ if (!public_server_mode(options)) {
+ options->CellStatistics = 0;
+ options->EntryStatistics = 0;
+ options->ConnDirectionStatistics = 0;
+ options->ExitPortStatistics = 0;
+ }
+
+ if ((!old_options || !old_options->CellStatistics) &&
+ options->CellStatistics) {
+ rep_hist_buffer_stats_init(now);
+ print_notice = 1;
+ }
+ if ((!old_options || !old_options->DirReqStatistics) &&
+ options->DirReqStatistics) {
+ if (geoip_is_loaded(AF_INET)) {
+ geoip_dirreq_stats_init(now);
+ print_notice = 1;
+ } else {
+ /* disable statistics collection since we have no geoip file */
+ options->DirReqStatistics = 0;
+ if (options->ORPort_set)
+ log_notice(LD_CONFIG, "Configured to measure directory request "
+ "statistics, but no GeoIP database found. "
+ "Please specify a GeoIP database using the "
+ "GeoIPFile option.");
+ }
+ }
+ if ((!old_options || !old_options->EntryStatistics) &&
+ options->EntryStatistics && !should_record_bridge_info(options)) {
+ /* If we get here, we've started recording bridge info when we didn't
+ * do so before. Note that "should_record_bridge_info()" will
+ * always be false at this point, because of the earlier block
+ * that cleared EntryStatistics when public_server_mode() was false.
+ * We're leaving it in as defensive programming. */
+ if (geoip_is_loaded(AF_INET) || geoip_is_loaded(AF_INET6)) {
+ geoip_entry_stats_init(now);
+ print_notice = 1;
+ } else {
+ options->EntryStatistics = 0;
+ log_notice(LD_CONFIG, "Configured to measure entry node "
+ "statistics, but no GeoIP database found. "
+ "Please specify a GeoIP database using the "
+ "GeoIPFile option.");
+ }
+ }
+ if ((!old_options || !old_options->ExitPortStatistics) &&
+ options->ExitPortStatistics) {
+ rep_hist_exit_stats_init(now);
+ print_notice = 1;
+ }
+ if ((!old_options || !old_options->ConnDirectionStatistics) &&
+ options->ConnDirectionStatistics) {
+ rep_hist_conn_stats_init(now);
+ }
+ if ((!old_options || !old_options->HiddenServiceStatistics) &&
+ options->HiddenServiceStatistics) {
+ log_info(LD_CONFIG, "Configured to measure hidden service statistics.");
+ rep_hist_hs_stats_init(now);
+ }
+ if ((!old_options || !old_options->BridgeAuthoritativeDir) &&
+ options->BridgeAuthoritativeDir) {
+ rep_hist_desc_stats_init(now);
+ print_notice = 1;
+ }
+ if (print_notice)
+ log_notice(LD_CONFIG, "Configured to measure statistics. Look for "
+ "the *-stats files that will first be written to the "
+ "data directory in 24 hours from now.");
+ }
+
+ /* If we used to have statistics enabled but we just disabled them,
+ stop gathering them. */
+ if (old_options && old_options->CellStatistics &&
+ !options->CellStatistics)
+ rep_hist_buffer_stats_term();
+ if (old_options && old_options->DirReqStatistics &&
+ !options->DirReqStatistics)
+ geoip_dirreq_stats_term();
+ if (old_options && old_options->EntryStatistics &&
+ !options->EntryStatistics)
+ geoip_entry_stats_term();
+ if (old_options && old_options->HiddenServiceStatistics &&
+ !options->HiddenServiceStatistics)
+ rep_hist_hs_stats_term();
+ if (old_options && old_options->ExitPortStatistics &&
+ !options->ExitPortStatistics)
+ rep_hist_exit_stats_term();
+ if (old_options && old_options->ConnDirectionStatistics &&
+ !options->ConnDirectionStatistics)
+ rep_hist_conn_stats_term();
+ if (old_options && old_options->BridgeAuthoritativeDir &&
+ !options->BridgeAuthoritativeDir)
+ rep_hist_desc_stats_term();
+
+ /* Since our options changed, we might need to regenerate and upload our
+ * server descriptor.
+ */
+ if (!old_options ||
+ options_transition_affects_descriptor(old_options, options))
+ mark_my_descriptor_dirty("config change");
+
+ /* We may need to reschedule some directory stuff if our status changed. */
+ if (old_options) {
+ if (options_transition_affects_dirauth_timing(old_options, options)) {
+ voting_schedule_recalculate_timing(options, time(NULL));
+ reschedule_dirvote(options);
+ }
+ if (!bool_eq(directory_fetches_dir_info_early(options),
+ directory_fetches_dir_info_early(old_options)) ||
+ !bool_eq(directory_fetches_dir_info_later(options),
+ directory_fetches_dir_info_later(old_options))) {
+ /* Make sure update_router_have_minimum_dir_info() gets called. */
+ router_dir_info_changed();
+ /* We might need to download a new consensus status later or sooner than
+ * we had expected. */
+ update_consensus_networkstatus_fetch_time(time(NULL));
+ }
+ }
+
+ /* DoS mitigation subsystem only applies to public relay. */
+ if (public_server_mode(options)) {
+ /* If we are configured as a relay, initialize the subsystem. Even on HUP,
+ * this is safe to call as it will load data from the current options
+ * or/and the consensus. */
+ dos_init();
+ } else if (old_options && public_server_mode(old_options)) {
+ /* Going from relay to non relay, clean it up. */
+ dos_free_all();
+ }
+
+ /* Load the webpage we're going to serve every time someone asks for '/' on
+ our DirPort. */
+ tor_free(global_dirfrontpagecontents);
+ if (options->DirPortFrontPage) {
+ global_dirfrontpagecontents =
+ read_file_to_str(options->DirPortFrontPage, 0, NULL);
+ if (!global_dirfrontpagecontents) {
+ log_warn(LD_CONFIG,
+ "DirPortFrontPage file '%s' not found. Continuing anyway.",
+ options->DirPortFrontPage);
+ }
+ }
+
+ return 0;
+}
+
+typedef enum {
+ TAKES_NO_ARGUMENT = 0,
+ ARGUMENT_NECESSARY = 1,
+ ARGUMENT_OPTIONAL = 2
+} takes_argument_t;
+
+static const struct {
+ const char *name;
+ takes_argument_t takes_argument;
+} CMDLINE_ONLY_OPTIONS[] = {
+ { "-f", ARGUMENT_NECESSARY },
+ { "--allow-missing-torrc", TAKES_NO_ARGUMENT },
+ { "--defaults-torrc", ARGUMENT_NECESSARY },
+ { "--hash-password", ARGUMENT_NECESSARY },
+ { "--dump-config", ARGUMENT_OPTIONAL },
+ { "--list-fingerprint", TAKES_NO_ARGUMENT },
+ { "--keygen", TAKES_NO_ARGUMENT },
+ { "--key-expiration", ARGUMENT_OPTIONAL },
+ { "--newpass", TAKES_NO_ARGUMENT },
+ { "--no-passphrase", TAKES_NO_ARGUMENT },
+ { "--passphrase-fd", ARGUMENT_NECESSARY },
+ { "--verify-config", TAKES_NO_ARGUMENT },
+ { "--ignore-missing-torrc", TAKES_NO_ARGUMENT },
+ { "--quiet", TAKES_NO_ARGUMENT },
+ { "--hush", TAKES_NO_ARGUMENT },
+ { "--version", TAKES_NO_ARGUMENT },
+ { "--library-versions", TAKES_NO_ARGUMENT },
+ { "-h", TAKES_NO_ARGUMENT },
+ { "--help", TAKES_NO_ARGUMENT },
+ { "--list-torrc-options", TAKES_NO_ARGUMENT },
+ { "--list-deprecated-options",TAKES_NO_ARGUMENT },
+ { "--nt-service", TAKES_NO_ARGUMENT },
+ { "-nt-service", TAKES_NO_ARGUMENT },
+ { NULL, 0 },
+};
+
+/** Helper: Read a list of configuration options from the command line. If
+ * successful, or if ignore_errors is set, put them in *<b>result</b>, put the
+ * commandline-only options in *<b>cmdline_result</b>, and return 0;
+ * otherwise, return -1 and leave *<b>result</b> and <b>cmdline_result</b>
+ * alone. */
+int
+config_parse_commandline(int argc, char **argv, int ignore_errors,
+ config_line_t **result,
+ config_line_t **cmdline_result)
+{
+ config_line_t *param = NULL;
+
+ config_line_t *front = NULL;
+ config_line_t **new = &front;
+
+ config_line_t *front_cmdline = NULL;
+ config_line_t **new_cmdline = &front_cmdline;
+
+ char *s, *arg;
+ int i = 1;
+
+ while (i < argc) {
+ unsigned command = CONFIG_LINE_NORMAL;
+ takes_argument_t want_arg = ARGUMENT_NECESSARY;
+ int is_cmdline = 0;
+ int j;
+
+ for (j = 0; CMDLINE_ONLY_OPTIONS[j].name != NULL; ++j) {
+ if (!strcmp(argv[i], CMDLINE_ONLY_OPTIONS[j].name)) {
+ is_cmdline = 1;
+ want_arg = CMDLINE_ONLY_OPTIONS[j].takes_argument;
+ break;
+ }
+ }
+
+ s = argv[i];
+
+ /* Each keyword may be prefixed with one or two dashes. */
+ if (*s == '-')
+ s++;
+ if (*s == '-')
+ s++;
+ /* Figure out the command, if any. */
+ if (*s == '+') {
+ s++;
+ command = CONFIG_LINE_APPEND;
+ } else if (*s == '/') {
+ s++;
+ command = CONFIG_LINE_CLEAR;
+ /* A 'clear' command has no argument. */
+ want_arg = 0;
+ }
+
+ const int is_last = (i == argc-1);
+
+ if (want_arg == ARGUMENT_NECESSARY && is_last) {
+ if (ignore_errors) {
+ arg = tor_strdup("");
+ } else {
+ log_warn(LD_CONFIG,"Command-line option '%s' with no value. Failing.",
+ argv[i]);
+ config_free_lines(front);
+ config_free_lines(front_cmdline);
+ return -1;
+ }
+ } else if (want_arg == ARGUMENT_OPTIONAL && is_last) {
+ arg = tor_strdup("");
+ } else {
+ arg = (want_arg != TAKES_NO_ARGUMENT) ? tor_strdup(argv[i+1]) :
+ tor_strdup("");
+ }
+
+ param = tor_malloc_zero(sizeof(config_line_t));
+ param->key = is_cmdline ? tor_strdup(argv[i]) :
+ tor_strdup(config_expand_abbrev(&options_format, s, 1, 1));
+ param->value = arg;
+ param->command = command;
+ param->next = NULL;
+ log_debug(LD_CONFIG, "command line: parsed keyword '%s', value '%s'",
+ param->key, param->value);
+
+ if (is_cmdline) {
+ *new_cmdline = param;
+ new_cmdline = &((*new_cmdline)->next);
+ } else {
+ *new = param;
+ new = &((*new)->next);
+ }
+
+ i += want_arg ? 2 : 1;
+ }
+ *cmdline_result = front_cmdline;
+ *result = front;
+ return 0;
+}
+
+/** Return true iff key is a valid configuration option. */
+int
+option_is_recognized(const char *key)
+{
+ const config_var_t *var = config_find_option(&options_format, key);
+ return (var != NULL);
+}
+
+/** Return the canonical name of a configuration option, or NULL
+ * if no such option exists. */
+const char *
+option_get_canonical_name(const char *key)
+{
+ const config_var_t *var = config_find_option(&options_format, key);
+ return var ? var->name : NULL;
+}
+
+/** Return a canonical list of the options assigned for key.
+ */
+config_line_t *
+option_get_assignment(const or_options_t *options, const char *key)
+{
+ return config_get_assigned_option(&options_format, options, key, 1);
+}
+
+/** Try assigning <b>list</b> to the global options. You do this by duping
+ * options, assigning list to the new one, then validating it. If it's
+ * ok, then throw out the old one and stick with the new one. Else,
+ * revert to old and return failure. Return SETOPT_OK on success, or
+ * a setopt_err_t on failure.
+ *
+ * If not success, point *<b>msg</b> to a newly allocated string describing
+ * what went wrong.
+ */
+setopt_err_t
+options_trial_assign(config_line_t *list, unsigned flags, char **msg)
+{
+ int r;
+ or_options_t *trial_options = config_dup(&options_format, get_options());
+
+ if ((r=config_assign(&options_format, trial_options,
+ list, flags, msg)) < 0) {
+ or_options_free(trial_options);
+ return r;
+ }
+
+ setopt_err_t rv;
+ or_options_t *cur_options = get_options_mutable();
+
+ in_option_validation = 1;
+
+ if (options_validate(cur_options, trial_options,
+ global_default_options, 1, msg) < 0) {
+ or_options_free(trial_options);
+ rv = SETOPT_ERR_PARSE; /*XXX make this a separate return value. */
+ goto done;
+ }
+
+ if (options_transition_allowed(cur_options, trial_options, msg) < 0) {
+ or_options_free(trial_options);
+ rv = SETOPT_ERR_TRANSITION;
+ goto done;
+ }
+ in_option_validation = 0;
+
+ if (set_options(trial_options, msg)<0) {
+ or_options_free(trial_options);
+ rv = SETOPT_ERR_SETTING;
+ goto done;
+ }
+
+ /* we liked it. put it in place. */
+ rv = SETOPT_OK;
+ done:
+ in_option_validation = 0;
+ return rv;
+}
+
+/** Print a usage message for tor. */
+static void
+print_usage(void)
+{
+ printf(
+"Copyright (c) 2001-2004, Roger Dingledine\n"
+"Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson\n"
+"Copyright (c) 2007-2019, The Tor Project, Inc.\n\n"
+"tor -f <torrc> [args]\n"
+"See man page for options, or https://www.torproject.org/ for "
+"documentation.\n");
+}
+
+/** Print all non-obsolete torrc options. */
+static void
+list_torrc_options(void)
+{
+ int i;
+ for (i = 0; option_vars_[i].name; ++i) {
+ const config_var_t *var = &option_vars_[i];
+ if (var->type == CONFIG_TYPE_OBSOLETE ||
+ var->type == CONFIG_TYPE_LINELIST_V)
+ continue;
+ printf("%s\n", var->name);
+ }
+}
+
+/** Print all deprecated but non-obsolete torrc options. */
+static void
+list_deprecated_options(void)
+{
+ const config_deprecation_t *d;
+ for (d = option_deprecation_notes_; d->name; ++d) {
+ printf("%s\n", d->name);
+ }
+}
+
+/** Last value actually set by resolve_my_address. */
+static uint32_t last_resolved_addr = 0;
+
+/** Accessor for last_resolved_addr from outside this file. */
+uint32_t
+get_last_resolved_addr(void)
+{
+ return last_resolved_addr;
+}
+
+/** Reset last_resolved_addr from outside this file. */
+void
+reset_last_resolved_addr(void)
+{
+ last_resolved_addr = 0;
+}
+
+/* Return true if <b>options</b> is using the default authorities, and false
+ * if any authority-related option has been overridden. */
+int
+using_default_dir_authorities(const or_options_t *options)
+{
+ return (!options->DirAuthorities && !options->AlternateDirAuthority);
+}
+
+/**
+ * Attempt getting our non-local (as judged by tor_addr_is_internal()
+ * function) IP address using following techniques, listed in
+ * order from best (most desirable, try first) to worst (least
+ * desirable, try if everything else fails).
+ *
+ * First, attempt using <b>options-\>Address</b> to get our
+ * non-local IP address.
+ *
+ * If <b>options-\>Address</b> represents a non-local IP address,
+ * consider it ours.
+ *
+ * If <b>options-\>Address</b> is a DNS name that resolves to
+ * a non-local IP address, consider this IP address ours.
+ *
+ * If <b>options-\>Address</b> is NULL, fall back to getting local
+ * hostname and using it in above-described ways to try and
+ * get our IP address.
+ *
+ * In case local hostname cannot be resolved to a non-local IP
+ * address, try getting an IP address of network interface
+ * in hopes it will be non-local one.
+ *
+ * Fail if one or more of the following is true:
+ * - DNS name in <b>options-\>Address</b> cannot be resolved.
+ * - <b>options-\>Address</b> is a local host address.
+ * - Attempt at getting local hostname fails.
+ * - Attempt at getting network interface address fails.
+ *
+ * Return 0 if all is well, or -1 if we can't find a suitable
+ * public IP address.
+ *
+ * If we are returning 0:
+ * - Put our public IP address (in host order) into *<b>addr_out</b>.
+ * - If <b>method_out</b> is non-NULL, set *<b>method_out</b> to a static
+ * string describing how we arrived at our answer.
+ * - "CONFIGURED" - parsed from IP address string in
+ * <b>options-\>Address</b>
+ * - "RESOLVED" - resolved from DNS name in <b>options-\>Address</b>
+ * - "GETHOSTNAME" - resolved from a local hostname.
+ * - "INTERFACE" - retrieved from a network interface.
+ * - If <b>hostname_out</b> is non-NULL, and we resolved a hostname to
+ * get our address, set *<b>hostname_out</b> to a newly allocated string
+ * holding that hostname. (If we didn't get our address by resolving a
+ * hostname, set *<b>hostname_out</b> to NULL.)
+ *
+ * XXXX ipv6
+ */
+int
+resolve_my_address(int warn_severity, const or_options_t *options,
+ uint32_t *addr_out,
+ const char **method_out, char **hostname_out)
+{
+ struct in_addr in;
+ uint32_t addr; /* host order */
+ char hostname[256];
+ const char *method_used;
+ const char *hostname_used;
+ int explicit_ip=1;
+ int explicit_hostname=1;
+ int from_interface=0;
+ char *addr_string = NULL;
+ const char *address = options->Address;
+ int notice_severity = warn_severity <= LOG_NOTICE ?
+ LOG_NOTICE : warn_severity;
+
+ tor_addr_t myaddr;
+ tor_assert(addr_out);
+
+ /*
+ * Step one: Fill in 'hostname' to be our best guess.
+ */
+
+ if (address && *address) {
+ strlcpy(hostname, address, sizeof(hostname));
+ } else { /* then we need to guess our address */
+ explicit_ip = 0; /* it's implicit */
+ explicit_hostname = 0; /* it's implicit */
+
+ if (tor_gethostname(hostname, sizeof(hostname)) < 0) {
+ log_fn(warn_severity, LD_NET,"Error obtaining local hostname");
+ return -1;
+ }
+ log_debug(LD_CONFIG, "Guessed local host name as '%s'", hostname);
+ }
+
+ /*
+ * Step two: Now that we know 'hostname', parse it or resolve it. If
+ * it doesn't parse or resolve, look at the interface address. Set 'addr'
+ * to be our (host-order) 32-bit answer.
+ */
+
+ if (tor_inet_aton(hostname, &in) == 0) {
+ /* then we have to resolve it */
+ explicit_ip = 0;
+ if (tor_lookup_hostname(hostname, &addr)) { /* failed to resolve */
+ uint32_t interface_ip; /* host order */
+
+ if (explicit_hostname) {
+ log_fn(warn_severity, LD_CONFIG,
+ "Could not resolve local Address '%s'. Failing.", hostname);
+ return -1;
+ }
+ log_fn(notice_severity, LD_CONFIG,
+ "Could not resolve guessed local hostname '%s'. "
+ "Trying something else.", hostname);
+ if (get_interface_address(warn_severity, &interface_ip)) {
+ log_fn(warn_severity, LD_CONFIG,
+ "Could not get local interface IP address. Failing.");
+ return -1;
+ }
+ from_interface = 1;
+ addr = interface_ip;
+ log_fn(notice_severity, LD_CONFIG, "Learned IP address '%s' for "
+ "local interface. Using that.", fmt_addr32(addr));
+ strlcpy(hostname, "<guessed from interfaces>", sizeof(hostname));
+ } else { /* resolved hostname into addr */
+ tor_addr_from_ipv4h(&myaddr, addr);
+
+ if (!explicit_hostname &&
+ tor_addr_is_internal(&myaddr, 0)) {
+ tor_addr_t interface_ip;
+
+ log_fn(notice_severity, LD_CONFIG, "Guessed local hostname '%s' "
+ "resolves to a private IP address (%s). Trying something "
+ "else.", hostname, fmt_addr32(addr));
+
+ if (get_interface_address6(warn_severity, AF_INET, &interface_ip)<0) {
+ log_fn(warn_severity, LD_CONFIG,
+ "Could not get local interface IP address. Too bad.");
+ } else if (tor_addr_is_internal(&interface_ip, 0)) {
+ log_fn(notice_severity, LD_CONFIG,
+ "Interface IP address '%s' is a private address too. "
+ "Ignoring.", fmt_addr(&interface_ip));
+ } else {
+ from_interface = 1;
+ addr = tor_addr_to_ipv4h(&interface_ip);
+ log_fn(notice_severity, LD_CONFIG,
+ "Learned IP address '%s' for local interface."
+ " Using that.", fmt_addr32(addr));
+ strlcpy(hostname, "<guessed from interfaces>", sizeof(hostname));
+ }
+ }
+ }
+ } else {
+ addr = ntohl(in.s_addr); /* set addr so that addr_string is not
+ * illformed */
+ }
+
+ /*
+ * Step three: Check whether 'addr' is an internal IP address, and error
+ * out if it is and we don't want that.
+ */
+
+ tor_addr_from_ipv4h(&myaddr,addr);
+
+ addr_string = tor_dup_ip(addr);
+ if (tor_addr_is_internal(&myaddr, 0)) {
+ /* make sure we're ok with publishing an internal IP */
+ if (using_default_dir_authorities(options)) {
+ /* if they are using the default authorities, disallow internal IPs
+ * always. */
+ log_fn(warn_severity, LD_CONFIG,
+ "Address '%s' resolves to private IP address '%s'. "
+ "Tor servers that use the default DirAuthorities must have "
+ "public IP addresses.", hostname, addr_string);
+ tor_free(addr_string);
+ return -1;
+ }
+ if (!explicit_ip) {
+ /* even if they've set their own authorities, require an explicit IP if
+ * they're using an internal address. */
+ log_fn(warn_severity, LD_CONFIG, "Address '%s' resolves to private "
+ "IP address '%s'. Please set the Address config option to be "
+ "the IP address you want to use.", hostname, addr_string);
+ tor_free(addr_string);
+ return -1;
+ }
+ }
+
+ /*
+ * Step four: We have a winner! 'addr' is our answer for sure, and
+ * 'addr_string' is its string form. Fill out the various fields to
+ * say how we decided it.
+ */
+
+ log_debug(LD_CONFIG, "Resolved Address to '%s'.", addr_string);
+
+ if (explicit_ip) {
+ method_used = "CONFIGURED";
+ hostname_used = NULL;
+ } else if (explicit_hostname) {
+ method_used = "RESOLVED";
+ hostname_used = hostname;
+ } else if (from_interface) {
+ method_used = "INTERFACE";
+ hostname_used = NULL;
+ } else {
+ method_used = "GETHOSTNAME";
+ hostname_used = hostname;
+ }
+
+ *addr_out = addr;
+ if (method_out)
+ *method_out = method_used;
+ if (hostname_out)
+ *hostname_out = hostname_used ? tor_strdup(hostname_used) : NULL;
+
+ /*
+ * Step five: Check if the answer has changed since last time (or if
+ * there was no last time), and if so call various functions to keep
+ * us up-to-date.
+ */
+
+ if (last_resolved_addr && last_resolved_addr != *addr_out) {
+ /* Leave this as a notice, regardless of the requested severity,
+ * at least until dynamic IP address support becomes bulletproof. */
+ log_notice(LD_NET,
+ "Your IP address seems to have changed to %s "
+ "(METHOD=%s%s%s). Updating.",
+ addr_string, method_used,
+ hostname_used ? " HOSTNAME=" : "",
+ hostname_used ? hostname_used : "");
+ ip_address_changed(0);
+ }
+
+ if (last_resolved_addr != *addr_out) {
+ control_event_server_status(LOG_NOTICE,
+ "EXTERNAL_ADDRESS ADDRESS=%s METHOD=%s%s%s",
+ addr_string, method_used,
+ hostname_used ? " HOSTNAME=" : "",
+ hostname_used ? hostname_used : "");
+ }
+ last_resolved_addr = *addr_out;
+
+ /*
+ * And finally, clean up and return success.
+ */
+
+ tor_free(addr_string);
+ return 0;
+}
+
+/** Return true iff <b>addr</b> is judged to be on the same network as us, or
+ * on a private network.
+ */
+MOCK_IMPL(int,
+is_local_addr, (const tor_addr_t *addr))
+{
+ if (tor_addr_is_internal(addr, 0))
+ return 1;
+ /* Check whether ip is on the same /24 as we are. */
+ if (get_options()->EnforceDistinctSubnets == 0)
+ return 0;
+ if (tor_addr_family(addr) == AF_INET) {
+ uint32_t ip = tor_addr_to_ipv4h(addr);
+
+ /* It's possible that this next check will hit before the first time
+ * resolve_my_address actually succeeds. (For clients, it is likely that
+ * resolve_my_address will never be called at all). In those cases,
+ * last_resolved_addr will be 0, and so checking to see whether ip is on
+ * the same /24 as last_resolved_addr will be the same as checking whether
+ * it was on net 0, which is already done by tor_addr_is_internal.
+ */
+ if ((last_resolved_addr & (uint32_t)0xffffff00ul)
+ == (ip & (uint32_t)0xffffff00ul))
+ return 1;
+ }
+ return 0;
+}
+
+/** Return a new empty or_options_t. Used for testing. */
+or_options_t *
+options_new(void)
+{
+ return config_new(&options_format);
+}
+
+/** Set <b>options</b> to hold reasonable defaults for most options.
+ * Each option defaults to zero. */
+void
+options_init(or_options_t *options)
+{
+ config_init(&options_format, options);
+}
+
+/** Return a string containing a possible configuration file that would give
+ * the configuration in <b>options</b>. If <b>minimal</b> is true, do not
+ * include options that are the same as Tor's defaults.
+ */
+char *
+options_dump(const or_options_t *options, int how_to_dump)
+{
+ const or_options_t *use_defaults;
+ int minimal;
+ switch (how_to_dump) {
+ case OPTIONS_DUMP_MINIMAL:
+ use_defaults = global_default_options;
+ minimal = 1;
+ break;
+ case OPTIONS_DUMP_DEFAULTS:
+ use_defaults = NULL;
+ minimal = 1;
+ break;
+ case OPTIONS_DUMP_ALL:
+ use_defaults = NULL;
+ minimal = 0;
+ break;
+ default:
+ log_warn(LD_BUG, "Bogus value for how_to_dump==%d", how_to_dump);
+ return NULL;
+ }
+
+ return config_dump(&options_format, use_defaults, options, minimal, 0);
+}
+
+/** Return 0 if every element of sl is a string holding a decimal
+ * representation of a port number, or if sl is NULL.
+ * Otherwise set *msg and return -1. */
+static int
+validate_ports_csv(smartlist_t *sl, const char *name, char **msg)
+{
+ int i;
+ tor_assert(name);
+
+ if (!sl)
+ return 0;
+
+ SMARTLIST_FOREACH(sl, const char *, cp,
+ {
+ i = atoi(cp);
+ if (i < 1 || i > 65535) {
+ tor_asprintf(msg, "Port '%s' out of range in %s", cp, name);
+ return -1;
+ }
+ });
+ return 0;
+}
+
+/** If <b>value</b> exceeds ROUTER_MAX_DECLARED_BANDWIDTH, write
+ * a complaint into *<b>msg</b> using string <b>desc</b>, and return -1.
+ * Else return 0.
+ */
+static int
+ensure_bandwidth_cap(uint64_t *value, const char *desc, char **msg)
+{
+ if (*value > ROUTER_MAX_DECLARED_BANDWIDTH) {
+ /* This handles an understandable special case where somebody says "2gb"
+ * whereas our actual maximum is 2gb-1 (INT_MAX) */
+ --*value;
+ }
+ if (*value > ROUTER_MAX_DECLARED_BANDWIDTH) {
+ tor_asprintf(msg, "%s (%"PRIu64") must be at most %d",
+ desc, (*value),
+ ROUTER_MAX_DECLARED_BANDWIDTH);
+ return -1;
+ }
+ return 0;
+}
+
+/** Parse an authority type from <b>options</b>-\>PublishServerDescriptor
+ * and write it to <b>options</b>-\>PublishServerDescriptor_. Treat "1"
+ * as "v3" unless BridgeRelay is 1, in which case treat it as "bridge".
+ * Treat "0" as "".
+ * Return 0 on success or -1 if not a recognized authority type (in which
+ * case the value of PublishServerDescriptor_ is undefined). */
+static int
+compute_publishserverdescriptor(or_options_t *options)
+{
+ smartlist_t *list = options->PublishServerDescriptor;
+ dirinfo_type_t *auth = &options->PublishServerDescriptor_;
+ *auth = NO_DIRINFO;
+ if (!list) /* empty list, answer is none */
+ return 0;
+ SMARTLIST_FOREACH_BEGIN(list, const char *, string) {
+ if (!strcasecmp(string, "v1"))
+ log_warn(LD_CONFIG, "PublishServerDescriptor v1 has no effect, because "
+ "there are no v1 directory authorities anymore.");
+ else if (!strcmp(string, "1"))
+ if (options->BridgeRelay)
+ *auth |= BRIDGE_DIRINFO;
+ else
+ *auth |= V3_DIRINFO;
+ else if (!strcasecmp(string, "v2"))
+ log_warn(LD_CONFIG, "PublishServerDescriptor v2 has no effect, because "
+ "there are no v2 directory authorities anymore.");
+ else if (!strcasecmp(string, "v3"))
+ *auth |= V3_DIRINFO;
+ else if (!strcasecmp(string, "bridge"))
+ *auth |= BRIDGE_DIRINFO;
+ else if (!strcasecmp(string, "hidserv"))
+ log_warn(LD_CONFIG,
+ "PublishServerDescriptor hidserv is invalid. See "
+ "PublishHidServDescriptors.");
+ else if (!strcasecmp(string, "") || !strcmp(string, "0"))
+ /* no authority */;
+ else
+ return -1;
+ } SMARTLIST_FOREACH_END(string);
+ return 0;
+}
+
+/** Lowest allowable value for RendPostPeriod; if this is too low, hidden
+ * services can overload the directory system. */
+#define MIN_REND_POST_PERIOD (10*60)
+#define MIN_REND_POST_PERIOD_TESTING (5)
+
+/** Highest allowable value for CircuitsAvailableTimeout.
+ * If this is too large, client connections will stay open for too long,
+ * incurring extra padding overhead. */
+#define MAX_CIRCS_AVAILABLE_TIME (24*60*60)
+
+/** Highest allowable value for RendPostPeriod. */
+#define MAX_DIR_PERIOD ((7*24*60*60)/2)
+
+/** Lowest allowable value for MaxCircuitDirtiness; if this is too low, Tor
+ * will generate too many circuits and potentially overload the network. */
+#define MIN_MAX_CIRCUIT_DIRTINESS 10
+
+/** Highest allowable value for MaxCircuitDirtiness: prevents time_t
+ * overflows. */
+#define MAX_MAX_CIRCUIT_DIRTINESS (30*24*60*60)
+
+/** Lowest allowable value for CircuitStreamTimeout; if this is too low, Tor
+ * will generate too many circuits and potentially overload the network. */
+#define MIN_CIRCUIT_STREAM_TIMEOUT 10
+
+/** Lowest recommended value for CircuitBuildTimeout; if it is set too low
+ * and LearnCircuitBuildTimeout is off, the failure rate for circuit
+ * construction may be very high. In that case, if it is set below this
+ * threshold emit a warning.
+ * */
+#define RECOMMENDED_MIN_CIRCUIT_BUILD_TIMEOUT (10)
+
+static int
+options_validate_cb(void *old_options, void *options, void *default_options,
+ int from_setconf, char **msg)
+{
+ in_option_validation = 1;
+ int rv = options_validate(old_options, options, default_options,
+ from_setconf, msg);
+ in_option_validation = 0;
+ return rv;
+}
+
+/** Callback to free an or_options_t */
+static void
+options_free_cb(void *options)
+{
+ or_options_free_(options);
+}
+
+#define REJECT(arg) \
+ STMT_BEGIN *msg = tor_strdup(arg); return -1; STMT_END
+#if defined(__GNUC__) && __GNUC__ <= 3
+#define COMPLAIN(args...) \
+ STMT_BEGIN log_warn(LD_CONFIG, args); STMT_END
+#else
+#define COMPLAIN(args, ...) \
+ STMT_BEGIN log_warn(LD_CONFIG, args, ##__VA_ARGS__); STMT_END
+#endif /* defined(__GNUC__) && __GNUC__ <= 3 */
+
+/** Log a warning message iff <b>filepath</b> is not absolute.
+ * Warning message must contain option name <b>option</b> and
+ * an absolute path that <b>filepath</b> will resolve to.
+ *
+ * In case <b>filepath</b> is absolute, do nothing.
+ *
+ * Return 1 if there were relative paths; 0 otherwise.
+ */
+static int
+warn_if_option_path_is_relative(const char *option,
+ char *filepath)
+{
+ if (filepath && path_is_relative(filepath)) {
+ char *abs_path = make_path_absolute(filepath);
+ COMPLAIN("Path for %s (%s) is relative and will resolve to %s."
+ " Is this what you wanted?", option, filepath, abs_path);
+ tor_free(abs_path);
+ return 1;
+ }
+ return 0;
+}
+
+/** Scan <b>options</b> for occurrences of relative file/directory
+ * path and log a warning whenever it is found.
+ *
+ * Return 1 if there were relative paths; 0 otherwise.
+ */
+static int
+warn_about_relative_paths(or_options_t *options)
+{
+ tor_assert(options);
+ int n = 0;
+
+ n += warn_if_option_path_is_relative("CookieAuthFile",
+ options->CookieAuthFile);
+ n += warn_if_option_path_is_relative("ExtORPortCookieAuthFile",
+ options->ExtORPortCookieAuthFile);
+ n += warn_if_option_path_is_relative("DirPortFrontPage",
+ options->DirPortFrontPage);
+ n += warn_if_option_path_is_relative("V3BandwidthsFile",
+ options->V3BandwidthsFile);
+ n += warn_if_option_path_is_relative("ControlPortWriteToFile",
+ options->ControlPortWriteToFile);
+ n += warn_if_option_path_is_relative("GeoIPFile",options->GeoIPFile);
+ n += warn_if_option_path_is_relative("GeoIPv6File",options->GeoIPv6File);
+ n += warn_if_option_path_is_relative("Log",options->DebugLogFile);
+ n += warn_if_option_path_is_relative("AccelDir",options->AccelDir);
+ n += warn_if_option_path_is_relative("DataDirectory",options->DataDirectory);
+ n += warn_if_option_path_is_relative("PidFile",options->PidFile);
+ n += warn_if_option_path_is_relative("ClientOnionAuthDir",
+ options->ClientOnionAuthDir);
+
+ for (config_line_t *hs_line = options->RendConfigLines; hs_line;
+ hs_line = hs_line->next) {
+ if (!strcasecmp(hs_line->key, "HiddenServiceDir"))
+ n += warn_if_option_path_is_relative("HiddenServiceDir",hs_line->value);
+ }
+ return n != 0;
+}
+
+/* Validate options related to the scheduler. From the Schedulers list, the
+ * SchedulerTypes_ list is created with int values so once we select the
+ * scheduler, which can happen anytime at runtime, we don't have to parse
+ * strings and thus be quick.
+ *
+ * Return 0 on success else -1 and msg is set with an error message. */
+static int
+options_validate_scheduler(or_options_t *options, char **msg)
+{
+ tor_assert(options);
+ tor_assert(msg);
+
+ if (!options->Schedulers || smartlist_len(options->Schedulers) == 0) {
+ REJECT("Empty Schedulers list. Either remove the option so the defaults "
+ "can be used or set at least one value.");
+ }
+ /* Ok, we do have scheduler types, validate them. */
+ options->SchedulerTypes_ = smartlist_new();
+ SMARTLIST_FOREACH_BEGIN(options->Schedulers, const char *, type) {
+ int *sched_type;
+ if (!strcasecmp("KISTLite", type)) {
+ sched_type = tor_malloc_zero(sizeof(int));
+ *sched_type = SCHEDULER_KIST_LITE;
+ smartlist_add(options->SchedulerTypes_, sched_type);
+ } else if (!strcasecmp("KIST", type)) {
+ sched_type = tor_malloc_zero(sizeof(int));
+ *sched_type = SCHEDULER_KIST;
+ smartlist_add(options->SchedulerTypes_, sched_type);
+ } else if (!strcasecmp("Vanilla", type)) {
+ sched_type = tor_malloc_zero(sizeof(int));
+ *sched_type = SCHEDULER_VANILLA;
+ smartlist_add(options->SchedulerTypes_, sched_type);
+ } else {
+ tor_asprintf(msg, "Unknown type %s in option Schedulers. "
+ "Possible values are KIST, KISTLite and Vanilla.",
+ escaped(type));
+ return -1;
+ }
+ } SMARTLIST_FOREACH_END(type);
+
+ if (options->KISTSockBufSizeFactor < 0) {
+ REJECT("KISTSockBufSizeFactor must be at least 0");
+ }
+
+ /* Don't need to validate that the Interval is less than anything because
+ * zero is valid and all negative values are valid. */
+ if (options->KISTSchedRunInterval > KIST_SCHED_RUN_INTERVAL_MAX) {
+ tor_asprintf(msg, "KISTSchedRunInterval must not be more than %d (ms)",
+ KIST_SCHED_RUN_INTERVAL_MAX);
+ return -1;
+ }
+
+ return 0;
+}
+
+/* Validate options related to single onion services.
+ * Modifies some options that are incompatible with single onion services.
+ * On failure returns -1, and sets *msg to an error string.
+ * Returns 0 on success. */
+STATIC int
+options_validate_single_onion(or_options_t *options, char **msg)
+{
+ /* The two single onion service options must have matching values. */
+ if (options->HiddenServiceSingleHopMode &&
+ !options->HiddenServiceNonAnonymousMode) {
+ REJECT("HiddenServiceSingleHopMode does not provide any server anonymity. "
+ "It must be used with HiddenServiceNonAnonymousMode set to 1.");
+ }
+ if (options->HiddenServiceNonAnonymousMode &&
+ !options->HiddenServiceSingleHopMode) {
+ REJECT("HiddenServiceNonAnonymousMode does not provide any server "
+ "anonymity. It must be used with HiddenServiceSingleHopMode set to "
+ "1.");
+ }
+
+ /* Now that we've checked that the two options are consistent, we can safely
+ * call the rend_service_* functions that abstract these options. */
+
+ /* If you run an anonymous client with an active Single Onion service, the
+ * client loses anonymity. */
+ const int client_port_set = (options->SocksPort_set ||
+ options->TransPort_set ||
+ options->NATDPort_set ||
+ options->DNSPort_set ||
+ options->HTTPTunnelPort_set);
+ if (rend_service_non_anonymous_mode_enabled(options) && client_port_set) {
+ REJECT("HiddenServiceNonAnonymousMode is incompatible with using Tor as "
+ "an anonymous client. Please set Socks/Trans/NATD/DNSPort to 0, or "
+ "revert HiddenServiceNonAnonymousMode to 0.");
+ }
+
+ if (rend_service_allow_non_anonymous_connection(options)
+ && options->UseEntryGuards) {
+ /* Single Onion services only use entry guards when uploading descriptors;
+ * all other connections are one-hop. Further, Single Onions causes the
+ * hidden service code to do things which break the path bias
+ * detector, and it's far easier to turn off entry guards (and
+ * thus the path bias detector with it) than to figure out how to
+ * make path bias compatible with single onions.
+ */
+ log_notice(LD_CONFIG,
+ "HiddenServiceSingleHopMode is enabled; disabling "
+ "UseEntryGuards.");
+ options->UseEntryGuards = 0;
+ }
+
+ return 0;
+}
+
+/** Return 0 if every setting in <b>options</b> is reasonable, is a
+ * permissible transition from <b>old_options</b>, and none of the
+ * testing-only settings differ from <b>default_options</b> unless in
+ * testing mode. Else return -1. Should have no side effects, except for
+ * normalizing the contents of <b>options</b>.
+ *
+ * On error, tor_strdup an error explanation into *<b>msg</b>.
+ *
+ * XXX
+ * If <b>from_setconf</b>, we were called by the controller, and our
+ * Log line should stay empty. If it's 0, then give us a default log
+ * if there are no logs defined.
+ */
+STATIC int
+options_validate(or_options_t *old_options, or_options_t *options,
+ or_options_t *default_options, int from_setconf, char **msg)
+{
+ config_line_t *cl;
+ const char *uname = get_uname();
+ int n_ports=0;
+ int world_writable_control_socket=0;
+
+ tor_assert(msg);
+ *msg = NULL;
+
+ if (parse_ports(options, 1, msg, &n_ports,
+ &world_writable_control_socket) < 0)
+ return -1;
+
+ /* Set UseEntryGuards from the configured value, before we check it below.
+ * We change UseEntryGuards when it's incompatible with other options,
+ * but leave UseEntryGuards_option with the original value.
+ * Always use the value of UseEntryGuards, not UseEntryGuards_option. */
+ options->UseEntryGuards = options->UseEntryGuards_option;
+
+ if (server_mode(options) &&
+ (!strcmpstart(uname, "Windows 95") ||
+ !strcmpstart(uname, "Windows 98") ||
+ !strcmpstart(uname, "Windows Me"))) {
+ log_warn(LD_CONFIG, "Tor is running as a server, but you are "
+ "running %s; this probably won't work. See "
+ "https://www.torproject.org/docs/faq.html#BestOSForRelay "
+ "for details.", uname);
+ }
+
+ if (parse_outbound_addresses(options, 1, msg) < 0)
+ return -1;
+
+ if (validate_data_directories(options)<0)
+ REJECT("Invalid DataDirectory");
+
+ /* need to check for relative paths after we populate
+ * options->DataDirectory (just above). */
+ if (warn_about_relative_paths(options) && options->RunAsDaemon) {
+ REJECT("You have specified at least one relative path (see above) "
+ "with the RunAsDaemon option. RunAsDaemon is not compatible "
+ "with relative paths.");
+ }
+
+ if (options->Nickname == NULL) {
+ if (server_mode(options)) {
+ options->Nickname = tor_strdup(UNNAMED_ROUTER_NICKNAME);
+ }
+ } else {
+ if (!is_legal_nickname(options->Nickname)) {
+ tor_asprintf(msg,
+ "Nickname '%s', nicknames must be between 1 and 19 characters "
+ "inclusive, and must contain only the characters [a-zA-Z0-9].",
+ options->Nickname);
+ return -1;
+ }
+ }
+
+ if (server_mode(options) && !options->ContactInfo)
+ log_notice(LD_CONFIG, "Your ContactInfo config option is not set. "
+ "Please consider setting it, so we can contact you if your server is "
+ "misconfigured or something else goes wrong.");
+ const char *ContactInfo = options->ContactInfo;
+ if (ContactInfo && !string_is_utf8(ContactInfo, strlen(ContactInfo)))
+ REJECT("ContactInfo config option must be UTF-8.");
+
+ /* Special case on first boot if no Log options are given. */
+ if (!options->Logs && !options->RunAsDaemon && !from_setconf) {
+ if (quiet_level == 0)
+ config_line_append(&options->Logs, "Log", "notice stdout");
+ else if (quiet_level == 1)
+ config_line_append(&options->Logs, "Log", "warn stdout");
+ }
+
+ /* Validate the tor_log(s) */
+ if (options_init_logs(old_options, options, 1)<0)
+ REJECT("Failed to validate Log options. See logs for details.");
+
+ if (authdir_mode(options)) {
+ /* confirm that our address isn't broken, so we can complain now */
+ uint32_t tmp;
+ if (resolve_my_address(LOG_WARN, options, &tmp, NULL, NULL) < 0)
+ REJECT("Failed to resolve/guess local address. See logs for details.");
+ }
+
+ if (server_mode(options) && options->RendConfigLines)
+ log_warn(LD_CONFIG,
+ "Tor is currently configured as a relay and a hidden service. "
+ "That's not very secure: you should probably run your hidden service "
+ "in a separate Tor process, at least -- see "
+ "https://trac.torproject.org/8742";);
+
+ /* XXXX require that the only port not be DirPort? */
+ /* XXXX require that at least one port be listened-upon. */
+ if (n_ports == 0 && !options->RendConfigLines)
+ log_warn(LD_CONFIG,
+ "SocksPort, TransPort, NATDPort, DNSPort, and ORPort are all "
+ "undefined, and there aren't any hidden services configured. "
+ "Tor will still run, but probably won't do anything.");
+
+ options->TransProxyType_parsed = TPT_DEFAULT;
+#ifdef USE_TRANSPARENT
+ if (options->TransProxyType) {
+ if (!strcasecmp(options->TransProxyType, "default")) {
+ options->TransProxyType_parsed = TPT_DEFAULT;
+ } else if (!strcasecmp(options->TransProxyType, "pf-divert")) {
+#if !defined(OpenBSD) && !defined( DARWIN )
+ /* Later versions of OS X have pf */
+ REJECT("pf-divert is a OpenBSD-specific "
+ "and OS X/Darwin-specific feature.");
+#else
+ options->TransProxyType_parsed = TPT_PF_DIVERT;
+#endif /* !defined(OpenBSD) && !defined( DARWIN ) */
+ } else if (!strcasecmp(options->TransProxyType, "tproxy")) {
+#if !defined(__linux__)
+ REJECT("TPROXY is a Linux-specific feature.");
+#else
+ options->TransProxyType_parsed = TPT_TPROXY;
+#endif
+ } else if (!strcasecmp(options->TransProxyType, "ipfw")) {
+#ifndef KERNEL_MAY_SUPPORT_IPFW
+ /* Earlier versions of OS X have ipfw */
+ REJECT("ipfw is a FreeBSD-specific "
+ "and OS X/Darwin-specific feature.");
+#else
+ options->TransProxyType_parsed = TPT_IPFW;
+#endif /* !defined(KERNEL_MAY_SUPPORT_IPFW) */
+ } else {
+ REJECT("Unrecognized value for TransProxyType");
+ }
+
+ if (strcasecmp(options->TransProxyType, "default") &&
+ !options->TransPort_set) {
+ REJECT("Cannot use TransProxyType without any valid TransPort.");
+ }
+ }
+#else /* !(defined(USE_TRANSPARENT)) */
+ if (options->TransPort_set)
+ REJECT("TransPort is disabled in this build.");
+#endif /* defined(USE_TRANSPARENT) */
+
+ if (options->TokenBucketRefillInterval <= 0
+ || options->TokenBucketRefillInterval > 1000) {
+ REJECT("TokenBucketRefillInterval must be between 1 and 1000 inclusive.");
+ }
+
+ if (options->ExcludeExitNodes || options->ExcludeNodes) {
+ options->ExcludeExitNodesUnion_ = routerset_new();
+ routerset_union(options->ExcludeExitNodesUnion_,options->ExcludeExitNodes);
+ routerset_union(options->ExcludeExitNodesUnion_,options->ExcludeNodes);
+ }
+
+ if (options->NodeFamilies) {
+ options->NodeFamilySets = smartlist_new();
+ for (cl = options->NodeFamilies; cl; cl = cl->next) {
+ routerset_t *rs = routerset_new();
+ if (routerset_parse(rs, cl->value, cl->key) == 0) {
+ smartlist_add(options->NodeFamilySets, rs);
+ } else {
+ routerset_free(rs);
+ }
+ }
+ }
+
+ if (options->ExcludeNodes && options->StrictNodes) {
+ COMPLAIN("You have asked to exclude certain relays from all positions "
+ "in your circuits. Expect hidden services and other Tor "
+ "features to be broken in unpredictable ways.");
+ }
+
+ for (cl = options->RecommendedPackages; cl; cl = cl->next) {
+ if (! validate_recommended_package_line(cl->value)) {
+ log_warn(LD_CONFIG, "Invalid RecommendedPackage line %s will be ignored",
+ escaped(cl->value));
+ }
+ }
+
+ if (options->AuthoritativeDir) {
+ if (!options->ContactInfo && !options->TestingTorNetwork)
+ REJECT("Authoritative directory servers must set ContactInfo");
+ if (!options->RecommendedClientVersions)
+ options->RecommendedClientVersions =
+ config_lines_dup(options->RecommendedVersions);
+ if (!options->RecommendedServerVersions)
+ options->RecommendedServerVersions =
+ config_lines_dup(options->RecommendedVersions);
+ if (options->VersioningAuthoritativeDir &&
+ (!options->RecommendedClientVersions ||
+ !options->RecommendedServerVersions))
+ REJECT("Versioning authoritative dir servers must set "
+ "Recommended*Versions.");
+
+#ifdef HAVE_MODULE_DIRAUTH
+ char *t;
+ /* Call these functions to produce warnings only. */
+ t = format_recommended_version_list(options->RecommendedClientVersions, 1);
+ tor_free(t);
+ t = format_recommended_version_list(options->RecommendedServerVersions, 1);
+ tor_free(t);
+#endif
+
+ if (options->UseEntryGuards) {
+ log_info(LD_CONFIG, "Authoritative directory servers can't set "
+ "UseEntryGuards. Disabling.");
+ options->UseEntryGuards = 0;
+ }
+ if (!options->DownloadExtraInfo && authdir_mode_v3(options)) {
+ log_info(LD_CONFIG, "Authoritative directories always try to download "
+ "extra-info documents. Setting DownloadExtraInfo.");
+ options->DownloadExtraInfo = 1;
+ }
+ if (!(options->BridgeAuthoritativeDir ||
+ options->V3AuthoritativeDir))
+ REJECT("AuthoritativeDir is set, but none of "
+ "(Bridge/V3)AuthoritativeDir is set.");
+ /* If we have a v3bandwidthsfile and it's broken, complain on startup */
+ if (options->V3BandwidthsFile && !old_options) {
+ dirserv_read_measured_bandwidths(options->V3BandwidthsFile, NULL, NULL);
+ }
+ /* same for guardfraction file */
+ if (options->GuardfractionFile && !old_options) {
+ dirserv_read_guardfraction_file(options->GuardfractionFile, NULL);
+ }
+ }
+
+ if (options->AuthoritativeDir && !options->DirPort_set)
+ REJECT("Running as authoritative directory, but no DirPort set.");
+
+ if (options->AuthoritativeDir && !options->ORPort_set)
+ REJECT("Running as authoritative directory, but no ORPort set.");
+
+ if (options->AuthoritativeDir && options->ClientOnly)
+ REJECT("Running as authoritative directory, but ClientOnly also set.");
+
+ if (options->FetchDirInfoExtraEarly && !options->FetchDirInfoEarly)
+ REJECT("FetchDirInfoExtraEarly requires that you also set "
+ "FetchDirInfoEarly");
+
+ if (options->ConnLimit <= 0) {
+ tor_asprintf(msg,
+ "ConnLimit must be greater than 0, but was set to %d",
+ options->ConnLimit);
+ return -1;
+ }
+
+ if (options->PathsNeededToBuildCircuits >= 0.0) {
+ if (options->PathsNeededToBuildCircuits < 0.25) {
+ log_warn(LD_CONFIG, "PathsNeededToBuildCircuits is too low. Increasing "
+ "to 0.25");
+ options->PathsNeededToBuildCircuits = 0.25;
+ } else if (options->PathsNeededToBuildCircuits > 0.95) {
+ log_warn(LD_CONFIG, "PathsNeededToBuildCircuits is too high. Decreasing "
+ "to 0.95");
+ options->PathsNeededToBuildCircuits = 0.95;
+ }
+ }
+
+ if (options->MaxClientCircuitsPending <= 0 ||
+ options->MaxClientCircuitsPending > MAX_MAX_CLIENT_CIRCUITS_PENDING) {
+ tor_asprintf(msg,
+ "MaxClientCircuitsPending must be between 1 and %d, but "
+ "was set to %d", MAX_MAX_CLIENT_CIRCUITS_PENDING,
+ options->MaxClientCircuitsPending);
+ return -1;
+ }
+
+ if (validate_ports_csv(options->FirewallPorts, "FirewallPorts", msg) < 0)
+ return -1;
+
+ if (validate_ports_csv(options->LongLivedPorts, "LongLivedPorts", msg) < 0)
+ return -1;
+
+ if (validate_ports_csv(options->RejectPlaintextPorts,
+ "RejectPlaintextPorts", msg) < 0)
+ return -1;
+
+ if (validate_ports_csv(options->WarnPlaintextPorts,
+ "WarnPlaintextPorts", msg) < 0)
+ return -1;
+
+ if (options->FascistFirewall && !options->ReachableAddresses) {
+ if (options->FirewallPorts && smartlist_len(options->FirewallPorts)) {
+ /* We already have firewall ports set, so migrate them to
+ * ReachableAddresses, which will set ReachableORAddresses and
+ * ReachableDirAddresses if they aren't set explicitly. */
+ smartlist_t *instead = smartlist_new();
+ config_line_t *new_line = tor_malloc_zero(sizeof(config_line_t));
+ new_line->key = tor_strdup("ReachableAddresses");
+ /* If we're configured with the old format, we need to prepend some
+ * open ports. */
+ SMARTLIST_FOREACH(options->FirewallPorts, const char *, portno,
+ {
+ int p = atoi(portno);
+ if (p<0) continue;
+ smartlist_add_asprintf(instead, "*:%d", p);
+ });
+ new_line->value = smartlist_join_strings(instead,",",0,NULL);
+ /* These have been deprecated since 0.1.1.5-alpha-cvs */
+ log_notice(LD_CONFIG,
+ "Converting FascistFirewall and FirewallPorts "
+ "config options to new format: \"ReachableAddresses %s\"",
+ new_line->value);
+ options->ReachableAddresses = new_line;
+ SMARTLIST_FOREACH(instead, char *, cp, tor_free(cp));
+ smartlist_free(instead);
+ } else {
+ /* We do not have FirewallPorts set, so add 80 to
+ * ReachableDirAddresses, and 443 to ReachableORAddresses. */
+ if (!options->ReachableDirAddresses) {
+ config_line_t *new_line = tor_malloc_zero(sizeof(config_line_t));
+ new_line->key = tor_strdup("ReachableDirAddresses");
+ new_line->value = tor_strdup("*:80");
+ options->ReachableDirAddresses = new_line;
+ log_notice(LD_CONFIG, "Converting FascistFirewall config option "
+ "to new format: \"ReachableDirAddresses *:80\"");
+ }
+ if (!options->ReachableORAddresses) {
+ config_line_t *new_line = tor_malloc_zero(sizeof(config_line_t));
+ new_line->key = tor_strdup("ReachableORAddresses");
+ new_line->value = tor_strdup("*:443");
+ options->ReachableORAddresses = new_line;
+ log_notice(LD_CONFIG, "Converting FascistFirewall config option "
+ "to new format: \"ReachableORAddresses *:443\"");
+ }
+ }
+ }
+
+ if ((options->ReachableAddresses ||
+ options->ReachableORAddresses ||
+ options->ReachableDirAddresses ||
+ options->ClientUseIPv4 == 0) &&
+ server_mode(options))
+ REJECT("Servers must be able to freely connect to the rest "
+ "of the Internet, so they must not set Reachable*Addresses "
+ "or FascistFirewall or FirewallPorts or ClientUseIPv4 0.");
+
+ if (options->UseBridges &&
+ server_mode(options))
+ REJECT("Servers must be able to freely connect to the rest "
+ "of the Internet, so they must not set UseBridges.");
+
+ /* If both of these are set, we'll end up with funny behavior where we
+ * demand enough entrynodes be up and running else we won't build
+ * circuits, yet we never actually use them. */
+ if (options->UseBridges && options->EntryNodes)
+ REJECT("You cannot set both UseBridges and EntryNodes.");
+
+ /* If we have UseBridges as 1 and UseEntryGuards as 0, we end up bypassing
+ * the use of bridges */
+ if (options->UseBridges && !options->UseEntryGuards)
+ REJECT("Setting UseBridges requires also setting UseEntryGuards.");
+
+ options->MaxMemInQueues =
+ compute_real_max_mem_in_queues(options->MaxMemInQueues_raw,
+ server_mode(options));
+ options->MaxMemInQueues_low_threshold = (options->MaxMemInQueues / 4) * 3;
+
+ if (!options->SafeLogging ||
+ !strcasecmp(options->SafeLogging, "0")) {
+ options->SafeLogging_ = SAFELOG_SCRUB_NONE;
+ } else if (!strcasecmp(options->SafeLogging, "relay")) {
+ options->SafeLogging_ = SAFELOG_SCRUB_RELAY;
+ } else if (!strcasecmp(options->SafeLogging, "1")) {
+ options->SafeLogging_ = SAFELOG_SCRUB_ALL;
+ } else {
+ tor_asprintf(msg,
+ "Unrecognized value '%s' in SafeLogging",
+ escaped(options->SafeLogging));
+ return -1;
+ }
+
+ if (compute_publishserverdescriptor(options) < 0) {
+ tor_asprintf(msg, "Unrecognized value in PublishServerDescriptor");
+ return -1;
+ }
+
+ if ((options->BridgeRelay
+ || options->PublishServerDescriptor_ & BRIDGE_DIRINFO)
+ && (options->PublishServerDescriptor_ & V3_DIRINFO)) {
+ REJECT("Bridges are not supposed to publish router descriptors to the "
+ "directory authorities. Please correct your "
+ "PublishServerDescriptor line.");
+ }
+
+ if (options->BridgeRelay && options->DirPort_set) {
+ log_warn(LD_CONFIG, "Can't set a DirPort on a bridge relay; disabling "
+ "DirPort");
+ config_free_lines(options->DirPort_lines);
+ options->DirPort_lines = NULL;
+ options->DirPort_set = 0;
+ }
+
+ if (server_mode(options) && options->ConnectionPadding != -1) {
+ REJECT("Relays must use 'auto' for the ConnectionPadding setting.");
+ }
+
+ if (server_mode(options) && options->ReducedConnectionPadding != 0) {
+ REJECT("Relays cannot set ReducedConnectionPadding. ");
+ }
+
+ if (options->BridgeDistribution) {
+ if (!options->BridgeRelay) {
+ REJECT("You set BridgeDistribution, but you didn't set BridgeRelay!");
+ }
+ if (check_bridge_distribution_setting(options->BridgeDistribution) < 0) {
+ REJECT("Invalid BridgeDistribution value.");
+ }
+ }
+
+ if (options->MinUptimeHidServDirectoryV2 < 0) {
+ log_warn(LD_CONFIG, "MinUptimeHidServDirectoryV2 option must be at "
+ "least 0 seconds. Changing to 0.");
+ options->MinUptimeHidServDirectoryV2 = 0;
+ }
+
+ const int min_rendpostperiod =
+ options->TestingTorNetwork ?
+ MIN_REND_POST_PERIOD_TESTING : MIN_REND_POST_PERIOD;
+ if (options->RendPostPeriod < min_rendpostperiod) {
+ log_warn(LD_CONFIG, "RendPostPeriod option is too short; "
+ "raising to %d seconds.", min_rendpostperiod);
+ options->RendPostPeriod = min_rendpostperiod;
+ }
+
+ if (options->RendPostPeriod > MAX_DIR_PERIOD) {
+ log_warn(LD_CONFIG, "RendPostPeriod is too large; clipping to %ds.",
+ MAX_DIR_PERIOD);
+ options->RendPostPeriod = MAX_DIR_PERIOD;
+ }
+
+ /* Check the Single Onion Service options */
+ if (options_validate_single_onion(options, msg) < 0)
+ return -1;
+
+ if (options->CircuitsAvailableTimeout > MAX_CIRCS_AVAILABLE_TIME) {
+ // options_t is immutable for new code (the above code is older),
+ // so just make the user fix the value themselves rather than
+ // silently keep a shadow value lower than what they asked for.
+ REJECT("CircuitsAvailableTimeout is too large. Max is 24 hours.");
+ }
+
+ if (options->EntryNodes && !options->UseEntryGuards) {
+ REJECT("If EntryNodes is set, UseEntryGuards must be enabled.");
+ }
+
+ if (!(options->UseEntryGuards) &&
+ (options->RendConfigLines != NULL) &&
+ !rend_service_allow_non_anonymous_connection(options)) {
+ log_warn(LD_CONFIG,
+ "UseEntryGuards is disabled, but you have configured one or more "
+ "hidden services on this Tor instance. Your hidden services "
+ "will be very easy to locate using a well-known attack -- see "
+ "http://freehaven.net/anonbib/#hs-attack06 for details.");
+ }
+
+ if (options->NumPrimaryGuards && options->NumEntryGuards &&
+ options->NumEntryGuards > options->NumPrimaryGuards) {
+ REJECT("NumEntryGuards must not be greater than NumPrimaryGuards.");
+ }
+
+ if (options->EntryNodes &&
+ routerset_is_list(options->EntryNodes) &&
+ (routerset_len(options->EntryNodes) == 1) &&
+ (options->RendConfigLines != NULL)) {
+ tor_asprintf(msg,
+ "You have one single EntryNodes and at least one hidden service "
+ "configured. This is bad because it's very easy to locate your "
+ "entry guard which can then lead to the deanonymization of your "
+ "hidden service -- for more details, see "
+ "https://trac.torproject.org/projects/tor/ticket/14917. "
+ "For this reason, the use of one EntryNodes with an hidden "
+ "service is prohibited until a better solution is found.");
+ return -1;
+ }
+
+ /* Inform the hidden service operator that pinning EntryNodes can possibly
+ * be harmful for the service anonymity. */
+ if (options->EntryNodes &&
+ routerset_is_list(options->EntryNodes) &&
+ (options->RendConfigLines != NULL)) {
+ log_warn(LD_CONFIG,
+ "EntryNodes is set with multiple entries and at least one "
+ "hidden service is configured. Pinning entry nodes can possibly "
+ "be harmful to the service anonymity. Because of this, we "
+ "recommend you either don't do that or make sure you know what "
+ "you are doing. For more details, please look at "
+ "https://trac.torproject.org/projects/tor/ticket/21155.";);
+ }
+
+ /* Single Onion Services: non-anonymous hidden services */
+ if (rend_service_non_anonymous_mode_enabled(options)) {
+ log_warn(LD_CONFIG,
+ "HiddenServiceNonAnonymousMode is set. Every hidden service on "
+ "this tor instance is NON-ANONYMOUS. If "
+ "the HiddenServiceNonAnonymousMode option is changed, Tor will "
+ "refuse to launch hidden services from the same directories, to "
+ "protect your anonymity against config errors. This setting is "
+ "for experimental use only.");
+ }
+
+ if (!options->LearnCircuitBuildTimeout && options->CircuitBuildTimeout &&
+ options->CircuitBuildTimeout < RECOMMENDED_MIN_CIRCUIT_BUILD_TIMEOUT) {
+ log_warn(LD_CONFIG,
+ "CircuitBuildTimeout is shorter (%d seconds) than the recommended "
+ "minimum (%d seconds), and LearnCircuitBuildTimeout is disabled. "
+ "If tor isn't working, raise this value or enable "
+ "LearnCircuitBuildTimeout.",
+ options->CircuitBuildTimeout,
+ RECOMMENDED_MIN_CIRCUIT_BUILD_TIMEOUT );
+ } else if (!options->LearnCircuitBuildTimeout &&
+ !options->CircuitBuildTimeout) {
+ int severity = LOG_NOTICE;
+ /* Be a little quieter if we've deliberately disabled
+ * LearnCircuitBuildTimeout. */
+ if (circuit_build_times_disabled_(options, 1)) {
+ severity = LOG_INFO;
+ }
+ log_fn(severity, LD_CONFIG, "You disabled LearnCircuitBuildTimeout, but "
+ "didn't specify a CircuitBuildTimeout. I'll pick a plausible "
+ "default.");
+ }
+
+ if (options->PathBiasNoticeRate > 1.0) {
+ tor_asprintf(msg,
+ "PathBiasNoticeRate is too high. "
+ "It must be between 0 and 1.0");
+ return -1;
+ }
+ if (options->PathBiasWarnRate > 1.0) {
+ tor_asprintf(msg,
+ "PathBiasWarnRate is too high. "
+ "It must be between 0 and 1.0");
+ return -1;
+ }
+ if (options->PathBiasExtremeRate > 1.0) {
+ tor_asprintf(msg,
+ "PathBiasExtremeRate is too high. "
+ "It must be between 0 and 1.0");
+ return -1;
+ }
+ if (options->PathBiasNoticeUseRate > 1.0) {
+ tor_asprintf(msg,
+ "PathBiasNoticeUseRate is too high. "
+ "It must be between 0 and 1.0");
+ return -1;
+ }
+ if (options->PathBiasExtremeUseRate > 1.0) {
+ tor_asprintf(msg,
+ "PathBiasExtremeUseRate is too high. "
+ "It must be between 0 and 1.0");
+ return -1;
+ }
+
+ if (options->MaxCircuitDirtiness < MIN_MAX_CIRCUIT_DIRTINESS) {
+ log_warn(LD_CONFIG, "MaxCircuitDirtiness option is too short; "
+ "raising to %d seconds.", MIN_MAX_CIRCUIT_DIRTINESS);
+ options->MaxCircuitDirtiness = MIN_MAX_CIRCUIT_DIRTINESS;
+ }
+
+ if (options->MaxCircuitDirtiness > MAX_MAX_CIRCUIT_DIRTINESS) {
+ log_warn(LD_CONFIG, "MaxCircuitDirtiness option is too high; "
+ "setting to %d days.", MAX_MAX_CIRCUIT_DIRTINESS/86400);
+ options->MaxCircuitDirtiness = MAX_MAX_CIRCUIT_DIRTINESS;
+ }
+
+ if (options->CircuitStreamTimeout &&
+ options->CircuitStreamTimeout < MIN_CIRCUIT_STREAM_TIMEOUT) {
+ log_warn(LD_CONFIG, "CircuitStreamTimeout option is too short; "
+ "raising to %d seconds.", MIN_CIRCUIT_STREAM_TIMEOUT);
+ options->CircuitStreamTimeout = MIN_CIRCUIT_STREAM_TIMEOUT;
+ }
+
+ if (options->HeartbeatPeriod &&
+ options->HeartbeatPeriod < MIN_HEARTBEAT_PERIOD) {
+ log_warn(LD_CONFIG, "HeartbeatPeriod option is too short; "
+ "raising to %d seconds.", MIN_HEARTBEAT_PERIOD);
+ options->HeartbeatPeriod = MIN_HEARTBEAT_PERIOD;
+ }
+
+ if (options->KeepalivePeriod < 1)
+ REJECT("KeepalivePeriod option must be positive.");
+
+ if (ensure_bandwidth_cap(&options->BandwidthRate,
+ "BandwidthRate", msg) < 0)
+ return -1;
+ if (ensure_bandwidth_cap(&options->BandwidthBurst,
+ "BandwidthBurst", msg) < 0)
+ return -1;
+ if (ensure_bandwidth_cap(&options->MaxAdvertisedBandwidth,
+ "MaxAdvertisedBandwidth", msg) < 0)
+ return -1;
+ if (ensure_bandwidth_cap(&options->RelayBandwidthRate,
+ "RelayBandwidthRate", msg) < 0)
+ return -1;
+ if (ensure_bandwidth_cap(&options->RelayBandwidthBurst,
+ "RelayBandwidthBurst", msg) < 0)
+ return -1;
+ if (ensure_bandwidth_cap(&options->PerConnBWRate,
+ "PerConnBWRate", msg) < 0)
+ return -1;
+ if (ensure_bandwidth_cap(&options->PerConnBWBurst,
+ "PerConnBWBurst", msg) < 0)
+ return -1;
+ if (ensure_bandwidth_cap(&options->AuthDirFastGuarantee,
+ "AuthDirFastGuarantee", msg) < 0)
+ return -1;
+ if (ensure_bandwidth_cap(&options->AuthDirGuardBWGuarantee,
+ "AuthDirGuardBWGuarantee", msg) < 0)
+ return -1;
+
+ if (options->RelayBandwidthRate && !options->RelayBandwidthBurst)
+ options->RelayBandwidthBurst = options->RelayBandwidthRate;
+ if (options->RelayBandwidthBurst && !options->RelayBandwidthRate)
+ options->RelayBandwidthRate = options->RelayBandwidthBurst;
+
+ if (server_mode(options)) {
+ const unsigned required_min_bw =
+ public_server_mode(options) ?
+ RELAY_REQUIRED_MIN_BANDWIDTH : BRIDGE_REQUIRED_MIN_BANDWIDTH;
+ const char * const optbridge =
+ public_server_mode(options) ? "" : "bridge ";
+ if (options->BandwidthRate < required_min_bw) {
+ tor_asprintf(msg,
+ "BandwidthRate is set to %d bytes/second. "
+ "For %sservers, it must be at least %u.",
+ (int)options->BandwidthRate, optbridge,
+ required_min_bw);
+ return -1;
+ } else if (options->MaxAdvertisedBandwidth <
+ required_min_bw/2) {
+ tor_asprintf(msg,
+ "MaxAdvertisedBandwidth is set to %d bytes/second. "
+ "For %sservers, it must be at least %u.",
+ (int)options->MaxAdvertisedBandwidth, optbridge,
+ required_min_bw/2);
+ return -1;
+ }
+ if (options->RelayBandwidthRate &&
+ options->RelayBandwidthRate < required_min_bw) {
+ tor_asprintf(msg,
+ "RelayBandwidthRate is set to %d bytes/second. "
+ "For %sservers, it must be at least %u.",
+ (int)options->RelayBandwidthRate, optbridge,
+ required_min_bw);
+ return -1;
+ }
+ }
+
+ if (options->RelayBandwidthRate > options->RelayBandwidthBurst)
+ REJECT("RelayBandwidthBurst must be at least equal "
+ "to RelayBandwidthRate.");
+
+ if (options->BandwidthRate > options->BandwidthBurst)
+ REJECT("BandwidthBurst must be at least equal to BandwidthRate.");
+
+ /* if they set relaybandwidth* really high but left bandwidth*
+ * at the default, raise the defaults. */
+ if (options->RelayBandwidthRate > options->BandwidthRate)
+ options->BandwidthRate = options->RelayBandwidthRate;
+ if (options->RelayBandwidthBurst > options->BandwidthBurst)
+ options->BandwidthBurst = options->RelayBandwidthBurst;
+
+ if (accounting_parse_options(options, 1)<0)
+ REJECT("Failed to parse accounting options. See logs for details.");
+
+ if (options->AccountingMax) {
+ if (options->RendConfigLines && server_mode(options)) {
+ log_warn(LD_CONFIG, "Using accounting with a hidden service and an "
+ "ORPort is risky: your hidden service(s) and your public "
+ "address will all turn off at the same time, which may alert "
+ "observers that they are being run by the same party.");
+ } else if (config_count_key(options->RendConfigLines,
+ "HiddenServiceDir") > 1) {
+ log_warn(LD_CONFIG, "Using accounting with multiple hidden services is "
+ "risky: they will all turn off at the same time, which may "
+ "alert observers that they are being run by the same party.");
+ }
+ }
+
+ options->AccountingRule = ACCT_MAX;
+ if (options->AccountingRule_option) {
+ if (!strcmp(options->AccountingRule_option, "sum"))
+ options->AccountingRule = ACCT_SUM;
+ else if (!strcmp(options->AccountingRule_option, "max"))
+ options->AccountingRule = ACCT_MAX;
+ else if (!strcmp(options->AccountingRule_option, "in"))
+ options->AccountingRule = ACCT_IN;
+ else if (!strcmp(options->AccountingRule_option, "out"))
+ options->AccountingRule = ACCT_OUT;
+ else
+ REJECT("AccountingRule must be 'sum', 'max', 'in', or 'out'");
+ }
+
+ if (options->DirPort_set && !options->DirCache) {
+ REJECT("DirPort configured but DirCache disabled. DirPort requires "
+ "DirCache.");
+ }
+
+ if (options->BridgeRelay && !options->DirCache) {
+ REJECT("We're a bridge but DirCache is disabled. BridgeRelay requires "
+ "DirCache.");
+ }
+
+ if (server_mode(options)) {
+ char *dircache_msg = NULL;
+ if (have_enough_mem_for_dircache(options, 0, &dircache_msg)) {
+ log_warn(LD_CONFIG, "%s", dircache_msg);
+ tor_free(dircache_msg);
+ }
+ }
+
+ if (options->HTTPProxy) { /* parse it now */
+ if (tor_addr_port_lookup(options->HTTPProxy,
+ &options->HTTPProxyAddr, &options->HTTPProxyPort) < 0)
+ REJECT("HTTPProxy failed to parse or resolve. Please fix.");
+ if (options->HTTPProxyPort == 0) { /* give it a default */
+ options->HTTPProxyPort = 80;
+ }
+ }
+
+ if (options->HTTPProxyAuthenticator) {
+ if (strlen(options->HTTPProxyAuthenticator) >= 512)
+ REJECT("HTTPProxyAuthenticator is too long (>= 512 chars).");
+ }
+
+ if (options->HTTPSProxy) { /* parse it now */
+ if (tor_addr_port_lookup(options->HTTPSProxy,
+ &options->HTTPSProxyAddr, &options->HTTPSProxyPort) <0)
+ REJECT("HTTPSProxy failed to parse or resolve. Please fix.");
+ if (options->HTTPSProxyPort == 0) { /* give it a default */
+ options->HTTPSProxyPort = 443;
+ }
+ }
+
+ if (options->HTTPSProxyAuthenticator) {
+ if (strlen(options->HTTPSProxyAuthenticator) >= 512)
+ REJECT("HTTPSProxyAuthenticator is too long (>= 512 chars).");
+ }
+
+ if (options->Socks4Proxy) { /* parse it now */
+ if (tor_addr_port_lookup(options->Socks4Proxy,
+ &options->Socks4ProxyAddr,
+ &options->Socks4ProxyPort) <0)
+ REJECT("Socks4Proxy failed to parse or resolve. Please fix.");
+ if (options->Socks4ProxyPort == 0) { /* give it a default */
+ options->Socks4ProxyPort = 1080;
+ }
+ }
+
+ if (options->Socks5Proxy) { /* parse it now */
+ if (tor_addr_port_lookup(options->Socks5Proxy,
+ &options->Socks5ProxyAddr,
+ &options->Socks5ProxyPort) <0)
+ REJECT("Socks5Proxy failed to parse or resolve. Please fix.");
+ if (options->Socks5ProxyPort == 0) { /* give it a default */
+ options->Socks5ProxyPort = 1080;
+ }
+ }
+
+ /* Check if more than one exclusive proxy type has been enabled. */
+ if (!!options->Socks4Proxy + !!options->Socks5Proxy +
+ !!options->HTTPSProxy > 1)
+ REJECT("You have configured more than one proxy type. "
+ "(Socks4Proxy|Socks5Proxy|HTTPSProxy)");
+
+ /* Check if the proxies will give surprising behavior. */
+ if (options->HTTPProxy && !(options->Socks4Proxy ||
+ options->Socks5Proxy ||
+ options->HTTPSProxy)) {
+ log_warn(LD_CONFIG, "HTTPProxy configured, but no SOCKS proxy or "
+ "HTTPS proxy configured. Watch out: this configuration will "
+ "proxy unencrypted directory connections only.");
+ }
+
+ if (options->Socks5ProxyUsername) {
+ size_t len;
+
+ len = strlen(options->Socks5ProxyUsername);
+ if (len < 1 || len > MAX_SOCKS5_AUTH_FIELD_SIZE)
+ REJECT("Socks5ProxyUsername must be between 1 and 255 characters.");
+
+ if (!options->Socks5ProxyPassword)
+ REJECT("Socks5ProxyPassword must be included with Socks5ProxyUsername.");
+
+ len = strlen(options->Socks5ProxyPassword);
+ if (len < 1 || len > MAX_SOCKS5_AUTH_FIELD_SIZE)
+ REJECT("Socks5ProxyPassword must be between 1 and 255 characters.");
+ } else if (options->Socks5ProxyPassword)
+ REJECT("Socks5ProxyPassword must be included with Socks5ProxyUsername.");
+
+ if (options->HashedControlPassword) {
+ smartlist_t *sl = decode_hashed_passwords(options->HashedControlPassword);
+ if (!sl) {
+ REJECT("Bad HashedControlPassword: wrong length or bad encoding");
+ } else {
+ SMARTLIST_FOREACH(sl, char*, cp, tor_free(cp));
+ smartlist_free(sl);
+ }
+ }
+
+ if (options->HashedControlSessionPassword) {
+ smartlist_t *sl = decode_hashed_passwords(
+ options->HashedControlSessionPassword);
+ if (!sl) {
+ REJECT("Bad HashedControlSessionPassword: wrong length or bad encoding");
+ } else {
+ SMARTLIST_FOREACH(sl, char*, cp, tor_free(cp));
+ smartlist_free(sl);
+ }
+ }
+
+ if (options->OwningControllerProcess) {
+ const char *validate_pspec_msg = NULL;
+ if (tor_validate_process_specifier(options->OwningControllerProcess,
+ &validate_pspec_msg)) {
+ tor_asprintf(msg, "Bad OwningControllerProcess: %s",
+ validate_pspec_msg);
+ return -1;
+ }
+ }
+
+ if ((options->ControlPort_set || world_writable_control_socket) &&
+ !options->HashedControlPassword &&
+ !options->HashedControlSessionPassword &&
+ !options->CookieAuthentication) {
+ log_warn(LD_CONFIG, "Control%s is %s, but no authentication method "
+ "has been configured. This means that any program on your "
+ "computer can reconfigure your Tor. That's bad! You should "
+ "upgrade your Tor controller as soon as possible.",
+ options->ControlPort_set ? "Port" : "Socket",
+ options->ControlPort_set ? "open" : "world writable");
+ }
+
+ if (options->CookieAuthFileGroupReadable && !options->CookieAuthFile) {
+ log_warn(LD_CONFIG, "CookieAuthFileGroupReadable is set, but will have "
+ "no effect: you must specify an explicit CookieAuthFile to "
+ "have it group-readable.");
+ }
+
+ if (options->MyFamily_lines && options->BridgeRelay) {
+ log_warn(LD_CONFIG, "Listing a family for a bridge relay is not "
+ "supported: it can reveal bridge fingerprints to censors. "
+ "You should also make sure you aren't listing this bridge's "
+ "fingerprint in any other MyFamily.");
+ }
+ if (normalize_nickname_list(&options->MyFamily,
+ options->MyFamily_lines, "MyFamily", msg))
+ return -1;
+ for (cl = options->NodeFamilies; cl; cl = cl->next) {
+ routerset_t *rs = routerset_new();
+ if (routerset_parse(rs, cl->value, cl->key)) {
+ routerset_free(rs);
+ return -1;
+ }
+ routerset_free(rs);
+ }
+
+ if (validate_addr_policies(options, msg) < 0)
+ return -1;
+
+ /* If FallbackDir is set, we don't UseDefaultFallbackDirs */
+ if (options->UseDefaultFallbackDirs && options->FallbackDir) {
+ log_info(LD_CONFIG, "You have set UseDefaultFallbackDirs 1 and "
+ "FallbackDir(s). Ignoring UseDefaultFallbackDirs, and "
+ "using the FallbackDir(s) you have set.");
+ }
+
+ if (validate_dir_servers(options, old_options) < 0)
+ REJECT("Directory authority/fallback line did not parse. See logs "
+ "for details.");
+
+ if (options->UseBridges && !options->Bridges)
+ REJECT("If you set UseBridges, you must specify at least one bridge.");
+
+ for (cl = options->Bridges; cl; cl = cl->next) {
+ bridge_line_t *bridge_line = parse_bridge_line(cl->value);
+ if (!bridge_line)
+ REJECT("Bridge line did not parse. See logs for details.");
+ bridge_line_free(bridge_line);
+ }
+
+ for (cl = options->ClientTransportPlugin; cl; cl = cl->next) {
+ if (parse_transport_line(options, cl->value, 1, 0) < 0)
+ REJECT("Invalid client transport line. See logs for details.");
+ }
+
+ for (cl = options->ServerTransportPlugin; cl; cl = cl->next) {
+ if (parse_transport_line(options, cl->value, 1, 1) < 0)
+ REJECT("Invalid server transport line. See logs for details.");
+ }
+
+ if (options->ServerTransportPlugin && !server_mode(options)) {
+ log_notice(LD_GENERAL, "Tor is not configured as a relay but you specified"
+ " a ServerTransportPlugin line (%s). The ServerTransportPlugin "
+ "line will be ignored.",
+ escaped(options->ServerTransportPlugin->value));
+ }
+
+ for (cl = options->ServerTransportListenAddr; cl; cl = cl->next) {
+ /** If get_bindaddr_from_transport_listen_line() fails with
+ 'transport' being NULL, it means that something went wrong
+ while parsing the ServerTransportListenAddr line. */
+ char *bindaddr = get_bindaddr_from_transport_listen_line(cl->value, NULL);
+ if (!bindaddr)
+ REJECT("ServerTransportListenAddr did not parse. See logs for details.");
+ tor_free(bindaddr);
+ }
+
+ if (options->ServerTransportListenAddr && !options->ServerTransportPlugin) {
+ log_notice(LD_GENERAL, "You need at least a single managed-proxy to "
+ "specify a transport listen address. The "
+ "ServerTransportListenAddr line will be ignored.");
+ }
+
+ for (cl = options->ServerTransportOptions; cl; cl = cl->next) {
+ /** If get_options_from_transport_options_line() fails with
+ 'transport' being NULL, it means that something went wrong
+ while parsing the ServerTransportOptions line. */
+ smartlist_t *options_sl =
+ get_options_from_transport_options_line(cl->value, NULL);
+ if (!options_sl)
+ REJECT("ServerTransportOptions did not parse. See logs for details.");
+
+ SMARTLIST_FOREACH(options_sl, char *, cp, tor_free(cp));
+ smartlist_free(options_sl);
+ }
+
+ if (options->ConstrainedSockets) {
+ /* If the user wants to constrain socket buffer use, make sure the desired
+ * limit is between MIN|MAX_TCPSOCK_BUFFER in k increments. */
+ if (options->ConstrainedSockSize < MIN_CONSTRAINED_TCP_BUFFER ||
+ options->ConstrainedSockSize > MAX_CONSTRAINED_TCP_BUFFER ||
+ options->ConstrainedSockSize % 1024) {
+ tor_asprintf(msg,
+ "ConstrainedSockSize is invalid. Must be a value between %d and %d "
+ "in 1024 byte increments.",
+ MIN_CONSTRAINED_TCP_BUFFER, MAX_CONSTRAINED_TCP_BUFFER);
+ return -1;
+ }
+ if (options->DirPort_set) {
+ /* Providing cached directory entries while system TCP buffers are scarce
+ * will exacerbate the socket errors. Suggest that this be disabled. */
+ COMPLAIN("You have requested constrained socket buffers while also "
+ "serving directory entries via DirPort. It is strongly "
+ "suggested that you disable serving directory requests when "
+ "system TCP buffer resources are scarce.");
+ }
+ }
+
+ if (options->V3AuthVoteDelay + options->V3AuthDistDelay >=
+ options->V3AuthVotingInterval/2) {
+ /*
+ This doesn't work, but it seems like it should:
+ what code is preventing the interval being less than twice the lead-up?
+ if (options->TestingTorNetwork) {
+ if (options->V3AuthVoteDelay + options->V3AuthDistDelay >=
+ options->V3AuthVotingInterval) {
+ REJECT("V3AuthVoteDelay plus V3AuthDistDelay must be less than "
+ "V3AuthVotingInterval");
+ } else {
+ COMPLAIN("V3AuthVoteDelay plus V3AuthDistDelay is more than half "
+ "V3AuthVotingInterval. This may lead to "
+ "consensus instability, particularly if clocks drift.");
+ }
+ } else {
+ */
+ REJECT("V3AuthVoteDelay plus V3AuthDistDelay must be less than half "
+ "V3AuthVotingInterval");
+ /*
+ }
+ */
+ }
+
+ if (options->V3AuthVoteDelay < MIN_VOTE_SECONDS) {
+ if (options->TestingTorNetwork) {
+ if (options->V3AuthVoteDelay < MIN_VOTE_SECONDS_TESTING) {
+ REJECT("V3AuthVoteDelay is way too low.");
+ } else {
+ COMPLAIN("V3AuthVoteDelay is very low. "
+ "This may lead to failure to vote for a consensus.");
+ }
+ } else {
+ REJECT("V3AuthVoteDelay is way too low.");
+ }
+ }
+
+ if (options->V3AuthDistDelay < MIN_DIST_SECONDS) {
+ if (options->TestingTorNetwork) {
+ if (options->V3AuthDistDelay < MIN_DIST_SECONDS_TESTING) {
+ REJECT("V3AuthDistDelay is way too low.");
+ } else {
+ COMPLAIN("V3AuthDistDelay is very low. "
+ "This may lead to missing votes in a consensus.");
+ }
+ } else {
+ REJECT("V3AuthDistDelay is way too low.");
+ }
+ }
+
+ if (options->V3AuthNIntervalsValid < 2)
+ REJECT("V3AuthNIntervalsValid must be at least 2.");
+
+ if (options->V3AuthVotingInterval < MIN_VOTE_INTERVAL) {
+ if (options->TestingTorNetwork) {
+ if (options->V3AuthVotingInterval < MIN_VOTE_INTERVAL_TESTING) {
+ REJECT("V3AuthVotingInterval is insanely low.");
+ } else {
+ COMPLAIN("V3AuthVotingInterval is very low. "
+ "This may lead to failure to synchronise for a consensus.");
+ }
+ } else {
+ REJECT("V3AuthVotingInterval is insanely low.");
+ }
+ } else if (options->V3AuthVotingInterval > 24*60*60) {
+ REJECT("V3AuthVotingInterval is insanely high.");
+ } else if (((24*60*60) % options->V3AuthVotingInterval) != 0) {
+ COMPLAIN("V3AuthVotingInterval does not divide evenly into 24 hours.");
+ }
+
+ if (hs_config_service_all(options, 1) < 0)
+ REJECT("Failed to configure rendezvous options. See logs for details.");
+
+ /* Parse client-side authorization for hidden services. */
+ if (hs_config_client_auth_all(options, 1) < 0)
+ REJECT("Failed to configure client authorization for hidden services. "
+ "See logs for details.");
+
+ if (parse_virtual_addr_network(options->VirtualAddrNetworkIPv4,
+ AF_INET, 1, msg)<0)
+ return -1;
+ if (parse_virtual_addr_network(options->VirtualAddrNetworkIPv6,
+ AF_INET6, 1, msg)<0)
+ return -1;
+
+ if (options->TestingTorNetwork &&
+ !(options->DirAuthorities ||
+ (options->AlternateDirAuthority &&
+ options->AlternateBridgeAuthority))) {
+ REJECT("TestingTorNetwork may only be configured in combination with "
+ "a non-default set of DirAuthority or both of "
+ "AlternateDirAuthority and AlternateBridgeAuthority configured.");
+ }
+
+#define CHECK_DEFAULT(arg) \
+ STMT_BEGIN \
+ if (!options->TestingTorNetwork && \
+ !options->UsingTestNetworkDefaults_ && \
+ !config_is_same(&options_format,options, \
+ default_options,#arg)) { \
+ REJECT(#arg " may only be changed in testing Tor " \
+ "networks!"); \
+ } STMT_END
+ CHECK_DEFAULT(TestingV3AuthInitialVotingInterval);
+ CHECK_DEFAULT(TestingV3AuthInitialVoteDelay);
+ CHECK_DEFAULT(TestingV3AuthInitialDistDelay);
+ CHECK_DEFAULT(TestingV3AuthVotingStartOffset);
+ CHECK_DEFAULT(TestingAuthDirTimeToLearnReachability);
+ CHECK_DEFAULT(TestingEstimatedDescriptorPropagationTime);
+ CHECK_DEFAULT(TestingServerDownloadInitialDelay);
+ CHECK_DEFAULT(TestingClientDownloadInitialDelay);
+ CHECK_DEFAULT(TestingServerConsensusDownloadInitialDelay);
+ CHECK_DEFAULT(TestingClientConsensusDownloadInitialDelay);
+ CHECK_DEFAULT(TestingBridgeDownloadInitialDelay);
+ CHECK_DEFAULT(TestingBridgeBootstrapDownloadInitialDelay);
+ CHECK_DEFAULT(TestingClientMaxIntervalWithoutRequest);
+ CHECK_DEFAULT(TestingDirConnectionMaxStall);
+ CHECK_DEFAULT(TestingAuthKeyLifetime);
+ CHECK_DEFAULT(TestingLinkCertLifetime);
+ CHECK_DEFAULT(TestingSigningKeySlop);
+ CHECK_DEFAULT(TestingAuthKeySlop);
+ CHECK_DEFAULT(TestingLinkKeySlop);
+#undef CHECK_DEFAULT
+
+ if (!options->ClientDNSRejectInternalAddresses &&
+ !(options->DirAuthorities ||
+ (options->AlternateDirAuthority && options->AlternateBridgeAuthority)))
+ REJECT("ClientDNSRejectInternalAddresses used for default network.");
+ if (options->SigningKeyLifetime < options->TestingSigningKeySlop*2)
+ REJECT("SigningKeyLifetime is too short.");
+ if (options->TestingLinkCertLifetime < options->TestingAuthKeySlop*2)
+ REJECT("LinkCertLifetime is too short.");
+ if (options->TestingAuthKeyLifetime < options->TestingLinkKeySlop*2)
+ REJECT("TestingAuthKeyLifetime is too short.");
+
+ if (options->TestingV3AuthInitialVotingInterval
+ < MIN_VOTE_INTERVAL_TESTING_INITIAL) {
+ REJECT("TestingV3AuthInitialVotingInterval is insanely low.");
+ } else if (((30*60) % options->TestingV3AuthInitialVotingInterval) != 0) {
+ REJECT("TestingV3AuthInitialVotingInterval does not divide evenly into "
+ "30 minutes.");
+ }
+
+ if (options->TestingV3AuthInitialVoteDelay < MIN_VOTE_SECONDS_TESTING) {
+ REJECT("TestingV3AuthInitialVoteDelay is way too low.");
+ }
+
+ if (options->TestingV3AuthInitialDistDelay < MIN_DIST_SECONDS_TESTING) {
+ REJECT("TestingV3AuthInitialDistDelay is way too low.");
+ }
+
+ if (options->TestingV3AuthInitialVoteDelay +
+ options->TestingV3AuthInitialDistDelay >=
+ options->TestingV3AuthInitialVotingInterval) {
+ REJECT("TestingV3AuthInitialVoteDelay plus TestingV3AuthInitialDistDelay "
+ "must be less than TestingV3AuthInitialVotingInterval");
+ }
+
+ if (options->TestingV3AuthVotingStartOffset >
+ MIN(options->TestingV3AuthInitialVotingInterval,
+ options->V3AuthVotingInterval)) {
+ REJECT("TestingV3AuthVotingStartOffset is higher than the voting "
+ "interval.");
+ } else if (options->TestingV3AuthVotingStartOffset < 0) {
+ REJECT("TestingV3AuthVotingStartOffset must be non-negative.");
+ }
+
+ if (options->TestingAuthDirTimeToLearnReachability < 0) {
+ REJECT("TestingAuthDirTimeToLearnReachability must be non-negative.");
+ } else if (options->TestingAuthDirTimeToLearnReachability > 2*60*60) {
+ COMPLAIN("TestingAuthDirTimeToLearnReachability is insanely high.");
+ }
+
+ if (options->TestingEstimatedDescriptorPropagationTime < 0) {
+ REJECT("TestingEstimatedDescriptorPropagationTime must be non-negative.");
+ } else if (options->TestingEstimatedDescriptorPropagationTime > 60*60) {
+ COMPLAIN("TestingEstimatedDescriptorPropagationTime is insanely high.");
+ }
+
+ if (options->TestingClientMaxIntervalWithoutRequest < 1) {
+ REJECT("TestingClientMaxIntervalWithoutRequest is way too low.");
+ } else if (options->TestingClientMaxIntervalWithoutRequest > 3600) {
+ COMPLAIN("TestingClientMaxIntervalWithoutRequest is insanely high.");
+ }
+
+ if (options->TestingDirConnectionMaxStall < 5) {
+ REJECT("TestingDirConnectionMaxStall is way too low.");
+ } else if (options->TestingDirConnectionMaxStall > 3600) {
+ COMPLAIN("TestingDirConnectionMaxStall is insanely high.");
+ }
+
+ if (options->ClientBootstrapConsensusMaxInProgressTries < 1) {
+ REJECT("ClientBootstrapConsensusMaxInProgressTries must be greater "
+ "than 0.");
+ } else if (options->ClientBootstrapConsensusMaxInProgressTries
+ > 100) {
+ COMPLAIN("ClientBootstrapConsensusMaxInProgressTries is insanely "
+ "high.");
+ }
+
+ if (options->TestingEnableConnBwEvent &&
+ !options->TestingTorNetwork && !options->UsingTestNetworkDefaults_) {
+ REJECT("TestingEnableConnBwEvent may only be changed in testing "
+ "Tor networks!");
+ }
+
+ if (options->TestingEnableCellStatsEvent &&
+ !options->TestingTorNetwork && !options->UsingTestNetworkDefaults_) {
+ REJECT("TestingEnableCellStatsEvent may only be changed in testing "
+ "Tor networks!");
+ }
+
+ if (options->TestingTorNetwork) {
+ log_warn(LD_CONFIG, "TestingTorNetwork is set. This will make your node "
+ "almost unusable in the public Tor network, and is "
+ "therefore only advised if you are building a "
+ "testing Tor network!");
+ }
+
+ if (options->AccelName && !options->HardwareAccel)
+ options->HardwareAccel = 1;
+ if (options->AccelDir && !options->AccelName)
+ REJECT("Can't use hardware crypto accelerator dir without engine name.");
+
+ if (options->PublishServerDescriptor)
+ SMARTLIST_FOREACH(options->PublishServerDescriptor, const char *, pubdes, {
+ if (!strcmp(pubdes, "1") || !strcmp(pubdes, "0"))
+ if (smartlist_len(options->PublishServerDescriptor) > 1) {
+ COMPLAIN("You have passed a list of multiple arguments to the "
+ "PublishServerDescriptor option that includes 0 or 1. "
+ "0 or 1 should only be used as the sole argument. "
+ "This configuration will be rejected in a future release.");
+ break;
+ }
+ });
+
+ if (options->BridgeRelay == 1 && ! options->ORPort_set)
+ REJECT("BridgeRelay is 1, ORPort is not set. This is an invalid "
+ "combination.");
+
+ if (options_validate_scheduler(options, msg) < 0) {
+ return -1;
+ }
+
+ return 0;
+}
+
+#undef REJECT
+#undef COMPLAIN
+
+/* Given the value that the user has set for MaxMemInQueues, compute the
+ * actual maximum value. We clip this value if it's too low, and autodetect
+ * it if it's set to 0. */
+STATIC uint64_t
+compute_real_max_mem_in_queues(const uint64_t val, int log_guess)
+{
+ uint64_t result;
+
+ if (val == 0) {
+#define ONE_GIGABYTE (UINT64_C(1) << 30)
+#define ONE_MEGABYTE (UINT64_C(1) << 20)
+ /* The user didn't pick a memory limit. Choose a very large one
+ * that is still smaller than the system memory */
+ static int notice_sent = 0;
+ size_t ram = 0;
+ if (get_total_system_memory(&ram) < 0) {
+ /* We couldn't determine our total system memory! */
+#if SIZEOF_VOID_P >= 8
+ /* 64-bit system. Let's hope for 8 GB. */
+ result = 8 * ONE_GIGABYTE;
+#else
+ /* (presumably) 32-bit system. Let's hope for 1 GB. */
+ result = ONE_GIGABYTE;
+#endif /* SIZEOF_VOID_P >= 8 */
+ } else {
+ /* We detected the amount of memory available. */
+ uint64_t avail = 0;
+
+#if SIZEOF_SIZE_T > 4
+/* On a 64-bit platform, we consider 8GB "very large". */
+#define RAM_IS_VERY_LARGE(x) ((x) >= (8 * ONE_GIGABYTE))
+#else
+/* On a 32-bit platform, we can't have 8GB of ram. */
+#define RAM_IS_VERY_LARGE(x) (0)
+#endif
+
+ if (RAM_IS_VERY_LARGE(ram)) {
+ /* If we have 8 GB, or more, RAM available, we set the MaxMemInQueues
+ * to 0.4 * RAM. The idea behind this value is that the amount of RAM
+ * is more than enough for a single relay and should allow the relay
+ * operator to run two relays if they have additional bandwidth
+ * available.
+ */
+ avail = (ram / 5) * 2;
+ } else {
+ /* If we have less than 8 GB of RAM available, we use the "old" default
+ * for MaxMemInQueues of 0.75 * RAM.
+ */
+ avail = (ram / 4) * 3;
+ }
+
+ /* Make sure it's in range from 0.25 GB to 8 GB for 64-bit and 0.25 to 2
+ * GB for 32-bit. */
+ if (avail > MAX_DEFAULT_MEMORY_QUEUE_SIZE) {
+ /* If you want to use more than this much RAM, you need to configure
+ it yourself */
+ result = MAX_DEFAULT_MEMORY_QUEUE_SIZE;
+ } else if (avail < ONE_GIGABYTE / 4) {
+ result = ONE_GIGABYTE / 4;
+ } else {
+ result = avail;
+ }
+ }
+ if (log_guess && ! notice_sent) {
+ log_notice(LD_CONFIG, "%sMaxMemInQueues is set to %"PRIu64" MB. "
+ "You can override this by setting MaxMemInQueues by hand.",
+ ram ? "Based on detected system memory, " : "",
+ (result / ONE_MEGABYTE));
+ notice_sent = 1;
+ }
+ return result;
+ } else if (val < ONE_GIGABYTE / 4) {
+ log_warn(LD_CONFIG, "MaxMemInQueues must be at least 256 MB for now. "
+ "Ideally, have it as large as you can afford.");
+ return ONE_GIGABYTE / 4;
+ } else {
+ /* The value was fine all along */
+ return val;
+ }
+}
+
+/* If we have less than 300 MB suggest disabling dircache */
+#define DIRCACHE_MIN_MEM_MB 300
+#define DIRCACHE_MIN_MEM_BYTES (DIRCACHE_MIN_MEM_MB*ONE_MEGABYTE)
+#define STRINGIFY(val) #val
+
+/** Create a warning message for emitting if we are a dircache but may not have
+ * enough system memory, or if we are not a dircache but probably should be.
+ * Return -1 when a message is returned in *msg*, else return 0. */
+STATIC int
+have_enough_mem_for_dircache(const or_options_t *options, size_t total_mem,
+ char **msg)
+{
+ *msg = NULL;
+ /* XXX We should possibly be looking at MaxMemInQueues here
+ * unconditionally. Or we should believe total_mem unconditionally. */
+ if (total_mem == 0) {
+ if (get_total_system_memory(&total_mem) < 0) {
+ total_mem = options->MaxMemInQueues >= SIZE_MAX ?
+ SIZE_MAX : (size_t)options->MaxMemInQueues;
+ }
+ }
+ if (options->DirCache) {
+ if (total_mem < DIRCACHE_MIN_MEM_BYTES) {
+ if (options->BridgeRelay) {
+ tor_asprintf(msg, "Running a Bridge with less than %d MB of memory "
+ "is not recommended.", DIRCACHE_MIN_MEM_MB);
+ } else {
+ tor_asprintf(msg, "Being a directory cache (default) with less than "
+ "%d MB of memory is not recommended and may consume "
+ "most of the available resources. Consider disabling "
+ "this functionality by setting the DirCache option "
+ "to 0.", DIRCACHE_MIN_MEM_MB);
+ }
+ }
+ } else {
+ if (total_mem >= DIRCACHE_MIN_MEM_BYTES) {
+ *msg = tor_strdup("DirCache is disabled and we are configured as a "
+ "relay. We will not become a Guard.");
+ }
+ }
+ return *msg == NULL ? 0 : -1;
+}
+#undef STRINGIFY
+
+/** Helper: return true iff s1 and s2 are both NULL, or both non-NULL
+ * equal strings. */
+static int
+opt_streq(const char *s1, const char *s2)
+{
+ return 0 == strcmp_opt(s1, s2);
+}
+
+/** Check if any of the previous options have changed but aren't allowed to. */
+static int
+options_transition_allowed(const or_options_t *old,
+ const or_options_t *new_val,
+ char **msg)
+{
+ if (!old)
+ return 0;
+
+#define BAD_CHANGE_TO(opt, how) do { \
+ *msg = tor_strdup("While Tor is running"how", changing " #opt \
+ " is not allowed"); \
+ return -1; \
+ } while (0)
+
+#define NO_CHANGE_BOOL(opt) \
+ if (! CFG_EQ_BOOL(old, new_val, opt)) BAD_CHANGE_TO(opt,"")
+#define NO_CHANGE_INT(opt) \
+ if (! CFG_EQ_INT(old, new_val, opt)) BAD_CHANGE_TO(opt,"")
+#define NO_CHANGE_STRING(opt) \
+ if (! CFG_EQ_STRING(old, new_val, opt)) BAD_CHANGE_TO(opt,"")
+
+ NO_CHANGE_STRING(PidFile);
+ NO_CHANGE_BOOL(RunAsDaemon);
+ NO_CHANGE_BOOL(Sandbox);
+ NO_CHANGE_STRING(DataDirectory);
+ NO_CHANGE_STRING(KeyDirectory);
+ NO_CHANGE_STRING(CacheDirectory);
+ NO_CHANGE_STRING(User);
+ NO_CHANGE_BOOL(KeepBindCapabilities);
+ NO_CHANGE_STRING(SyslogIdentityTag);
+ NO_CHANGE_STRING(AndroidIdentityTag);
+ NO_CHANGE_BOOL(HardwareAccel);
+ NO_CHANGE_STRING(AccelName);
+ NO_CHANGE_STRING(AccelDir);
+ NO_CHANGE_BOOL(TestingTorNetwork);
+ NO_CHANGE_BOOL(DisableAllSwap);
+ NO_CHANGE_INT(TokenBucketRefillInterval);
+ NO_CHANGE_BOOL(HiddenServiceSingleHopMode);
+ NO_CHANGE_BOOL(HiddenServiceNonAnonymousMode);
+ NO_CHANGE_BOOL(DisableDebuggerAttachment);
+ NO_CHANGE_BOOL(NoExec);
+ NO_CHANGE_INT(OwningControllerFD);
+ NO_CHANGE_BOOL(DisableSignalHandlers);
+
+ if (sandbox_is_active()) {
+#define SB_NOCHANGE_STR(opt) \
+ if (! CFG_EQ_STRING(old, new_val, opt)) \
+ BAD_CHANGE_TO(opt," with Sandbox active")
+#define SB_NOCHANGE_LINELIST(opt) \
+ if (! CFG_EQ_LINELIST(old, new_val, opt)) \
+ BAD_CHANGE_TO(opt," with Sandbox active")
+#define SB_NOCHANGE_INT(opt) \
+ if (! CFG_EQ_INT(old, new_val, opt)) \
+ BAD_CHANGE_TO(opt," with Sandbox active")
+
+ SB_NOCHANGE_STR(Address);
+ SB_NOCHANGE_STR(ServerDNSResolvConfFile);
+ SB_NOCHANGE_STR(DirPortFrontPage);
+ SB_NOCHANGE_STR(CookieAuthFile);
+ SB_NOCHANGE_STR(ExtORPortCookieAuthFile);
+ SB_NOCHANGE_LINELIST(Logs);
+ SB_NOCHANGE_INT(ConnLimit);
+
+ if (server_mode(old) != server_mode(new_val)) {
+ *msg = tor_strdup("Can't start/stop being a server while "
+ "Sandbox is active");
+ return -1;
+ }
+ }
+
+#undef SB_NOCHANGE_LINELIST
+#undef SB_NOCHANGE_STR
+#undef SB_NOCHANGE_INT
+#undef BAD_CHANGE_TO
+#undef NO_CHANGE_BOOL
+#undef NO_CHANGE_INT
+#undef NO_CHANGE_STRING
+ return 0;
+}
+
+/** Return 1 if any change from <b>old_options</b> to <b>new_options</b>
+ * will require us to rotate the CPU and DNS workers; else return 0. */
+static int
+options_transition_affects_workers(const or_options_t *old_options,
+ const or_options_t *new_options)
+{
+ YES_IF_CHANGED_STRING(DataDirectory);
+ YES_IF_CHANGED_INT(NumCPUs);
+ YES_IF_CHANGED_LINELIST(ORPort_lines);
+ YES_IF_CHANGED_BOOL(ServerDNSSearchDomains);
+ YES_IF_CHANGED_BOOL(SafeLogging_);
+ YES_IF_CHANGED_BOOL(ClientOnly);
+ YES_IF_CHANGED_BOOL(LogMessageDomains);
+ YES_IF_CHANGED_LINELIST(Logs);
+
+ if (server_mode(old_options) != server_mode(new_options) ||
+ public_server_mode(old_options) != public_server_mode(new_options) ||
+ dir_server_mode(old_options) != dir_server_mode(new_options))
+ return 1;
+
+ /* Nothing that changed matters. */
+ return 0;
+}
+
+/** Return 1 if any change from <b>old_options</b> to <b>new_options</b>
+ * will require us to generate a new descriptor; else return 0. */
+static int
+options_transition_affects_descriptor(const or_options_t *old_options,
+ const or_options_t *new_options)
+{
+ /* XXX We can be smarter here. If your DirPort isn't being
+ * published and you just turned it off, no need to republish. Etc. */
+
+ YES_IF_CHANGED_STRING(DataDirectory);
+ YES_IF_CHANGED_STRING(Nickname);
+ YES_IF_CHANGED_STRING(Address);
+ YES_IF_CHANGED_LINELIST(ExitPolicy);
+ YES_IF_CHANGED_BOOL(ExitRelay);
+ YES_IF_CHANGED_BOOL(ExitPolicyRejectPrivate);
+ YES_IF_CHANGED_BOOL(ExitPolicyRejectLocalInterfaces);
+ YES_IF_CHANGED_BOOL(IPv6Exit);
+ YES_IF_CHANGED_LINELIST(ORPort_lines);
+ YES_IF_CHANGED_LINELIST(DirPort_lines);
+ YES_IF_CHANGED_LINELIST(DirPort_lines);
+ YES_IF_CHANGED_BOOL(ClientOnly);
+ YES_IF_CHANGED_BOOL(DisableNetwork);
+ YES_IF_CHANGED_BOOL(PublishServerDescriptor_);
+ YES_IF_CHANGED_STRING(ContactInfo);
+ YES_IF_CHANGED_STRING(BridgeDistribution);
+ YES_IF_CHANGED_LINELIST(MyFamily);
+ YES_IF_CHANGED_STRING(AccountingStart);
+ YES_IF_CHANGED_INT(AccountingMax);
+ YES_IF_CHANGED_INT(AccountingRule);
+ YES_IF_CHANGED_BOOL(DirCache);
+ YES_IF_CHANGED_BOOL(AssumeReachable);
+
+ if (get_effective_bwrate(old_options) != get_effective_bwrate(new_options) ||
+ get_effective_bwburst(old_options) !=
+ get_effective_bwburst(new_options) ||
+ public_server_mode(old_options) != public_server_mode(new_options))
+ return 1;
+
+ return 0;
+}
+
+#ifdef _WIN32
+/** Return the directory on windows where we expect to find our application
+ * data. */
+static char *
+get_windows_conf_root(void)
+{
+ static int is_set = 0;
+ static char path[MAX_PATH*2+1];
+ TCHAR tpath[MAX_PATH] = {0};
+
+ LPITEMIDLIST idl;
+ IMalloc *m;
+ HRESULT result;
+
+ if (is_set)
+ return path;
+
+ /* Find X:\documents and settings\username\application data\ .
+ * We would use SHGetSpecialFolder path, but that wasn't added until IE4.
+ */
+#ifdef ENABLE_LOCAL_APPDATA
+#define APPDATA_PATH CSIDL_LOCAL_APPDATA
+#else
+#define APPDATA_PATH CSIDL_APPDATA
+#endif
+ if (!SUCCEEDED(SHGetSpecialFolderLocation(NULL, APPDATA_PATH, &idl))) {
+ getcwd(path,MAX_PATH);
+ is_set = 1;
+ log_warn(LD_CONFIG,
+ "I couldn't find your application data folder: are you "
+ "running an ancient version of Windows 95? Defaulting to \"%s\"",
+ path);
+ return path;
+ }
+ /* Convert the path from an "ID List" (whatever that is!) to a path. */
+ result = SHGetPathFromIDList(idl, tpath);
+#ifdef UNICODE
+ wcstombs(path,tpath,sizeof(path));
+ path[sizeof(path)-1] = '\0';
+#else
+ strlcpy(path,tpath,sizeof(path));
+#endif /* defined(UNICODE) */
+
+ /* Now we need to free the memory that the path-idl was stored in. In
+ * typical Windows fashion, we can't just call 'free()' on it. */
+ SHGetMalloc(&m);
+ if (m) {
+ m->lpVtbl->Free(m, idl);
+ m->lpVtbl->Release(m);
+ }
+ if (!SUCCEEDED(result)) {
+ return NULL;
+ }
+ strlcat(path,"\\tor",MAX_PATH);
+ is_set = 1;
+ return path;
+}
+#endif /* defined(_WIN32) */
+
+/** Return the default location for our torrc file (if <b>defaults_file</b> is
+ * false), or for the torrc-defaults file (if <b>defaults_file</b> is true). */
+static const char *
+get_default_conf_file(int defaults_file)
+{
+#ifdef DISABLE_SYSTEM_TORRC
+ (void) defaults_file;
+ return NULL;
+#elif defined(_WIN32)
+ if (defaults_file) {
+ static char defaults_path[MAX_PATH+1];
+ tor_snprintf(defaults_path, MAX_PATH, "%s\\torrc-defaults",
+ get_windows_conf_root());
+ return defaults_path;
+ } else {
+ static char path[MAX_PATH+1];
+ tor_snprintf(path, MAX_PATH, "%s\\torrc",
+ get_windows_conf_root());
+ return path;
+ }
+#else
+ return defaults_file ? CONFDIR "/torrc-defaults" : CONFDIR "/torrc";
+#endif /* defined(DISABLE_SYSTEM_TORRC) || ... */
+}
+
+/** Verify whether lst is a list of strings containing valid-looking
+ * comma-separated nicknames, or NULL. Will normalise <b>lst</b> to prefix '$'
+ * to any nickname or fingerprint that needs it. Also splits comma-separated
+ * list elements into multiple elements. Return 0 on success.
+ * Warn and return -1 on failure.
+ */
+static int
+normalize_nickname_list(config_line_t **normalized_out,
+ const config_line_t *lst, const char *name,
+ char **msg)
+{
+ if (!lst)
+ return 0;
+
+ config_line_t *new_nicknames = NULL;
+ config_line_t **new_nicknames_next = &new_nicknames;
+
+ const config_line_t *cl;
+ for (cl = lst; cl; cl = cl->next) {
+ const char *line = cl->value;
+ if (!line)
+ continue;
+
+ int valid_line = 1;
+ smartlist_t *sl = smartlist_new();
+ smartlist_split_string(sl, line, ",",
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK|SPLIT_STRIP_SPACE, 0);
+ SMARTLIST_FOREACH_BEGIN(sl, char *, s)
+ {
+ char *normalized = NULL;
+ if (!is_legal_nickname_or_hexdigest(s)) {
+ // check if first char is dollar
+ if (s[0] != '$') {
+ // Try again but with a dollar symbol prepended
+ char *prepended;
+ tor_asprintf(&prepended, "$%s", s);
+
+ if (is_legal_nickname_or_hexdigest(prepended)) {
+ // The nickname is valid when it's prepended, set it as the
+ // normalized version
+ normalized = prepended;
+ } else {
+ // Still not valid, free and fallback to error message
+ tor_free(prepended);
+ }
+ }
+
+ if (!normalized) {
+ tor_asprintf(msg, "Invalid nickname '%s' in %s line", s, name);
+ valid_line = 0;
+ break;
+ }
+ } else {
+ normalized = tor_strdup(s);
+ }
+
+ config_line_t *next = tor_malloc_zero(sizeof(*next));
+ next->key = tor_strdup(cl->key);
+ next->value = normalized;
+ next->next = NULL;
+
+ *new_nicknames_next = next;
+ new_nicknames_next = &next->next;
+ } SMARTLIST_FOREACH_END(s);
+
+ SMARTLIST_FOREACH(sl, char *, s, tor_free(s));
+ smartlist_free(sl);
+
+ if (!valid_line) {
+ config_free_lines(new_nicknames);
+ return -1;
+ }
+ }
+
+ *normalized_out = new_nicknames;
+
+ return 0;
+}
+
+/** Learn config file name from command line arguments, or use the default.
+ *
+ * If <b>defaults_file</b> is true, we're looking for torrc-defaults;
+ * otherwise, we're looking for the regular torrc_file.
+ *
+ * Set *<b>using_default_fname</b> to true if we're using the default
+ * configuration file name; or false if we've set it from the command line.
+ *
+ * Set *<b>ignore_missing_torrc</b> to true if we should ignore the resulting
+ * filename if it doesn't exist.
+ */
+static char *
+find_torrc_filename(config_line_t *cmd_arg,
+ int defaults_file,
+ int *using_default_fname, int *ignore_missing_torrc)
+{
+ char *fname=NULL;
+ config_line_t *p_index;
+ const char *fname_opt = defaults_file ? "--defaults-torrc" : "-f";
+ const char *ignore_opt = defaults_file ? NULL : "--ignore-missing-torrc";
+
+ if (defaults_file)
+ *ignore_missing_torrc = 1;
+
+ for (p_index = cmd_arg; p_index; p_index = p_index->next) {
+ if (!strcmp(p_index->key, fname_opt)) {
+ if (fname) {
+ log_warn(LD_CONFIG, "Duplicate %s options on command line.",
+ fname_opt);
+ tor_free(fname);
+ }
+ fname = expand_filename(p_index->value);
+
+ {
+ char *absfname;
+ absfname = make_path_absolute(fname);
+ tor_free(fname);
+ fname = absfname;
+ }
+
+ *using_default_fname = 0;
+ } else if (ignore_opt && !strcmp(p_index->key,ignore_opt)) {
+ *ignore_missing_torrc = 1;
+ }
+ }
+
+ if (*using_default_fname) {
+ /* didn't find one, try CONFDIR */
+ const char *dflt = get_default_conf_file(defaults_file);
+ file_status_t st = file_status(dflt);
+ if (dflt && (st == FN_FILE || st == FN_EMPTY)) {
+ fname = tor_strdup(dflt);
+ } else {
+#ifndef _WIN32
+ char *fn = NULL;
+ if (!defaults_file) {
+ fn = expand_filename("~/.torrc");
+ }
+ if (fn) {
+ file_status_t hmst = file_status(fn);
+ if (hmst == FN_FILE || hmst == FN_EMPTY || dflt == NULL) {
+ fname = fn;
+ } else {
+ tor_free(fn);
+ fname = tor_strdup(dflt);
+ }
+ } else {
+ fname = dflt ? tor_strdup(dflt) : NULL;
+ }
+#else /* !(!defined(_WIN32)) */
+ fname = dflt ? tor_strdup(dflt) : NULL;
+#endif /* !defined(_WIN32) */
+ }
+ }
+ return fname;
+}
+
+/** Read the torrc from standard input and return it as a string.
+ * Upon failure, return NULL.
+ */
+static char *
+load_torrc_from_stdin(void)
+{
+ size_t sz_out;
+
+ return read_file_to_str_until_eof(STDIN_FILENO,SIZE_MAX,&sz_out);
+}
+
+/** Load a configuration file from disk, setting torrc_fname or
+ * torrc_defaults_fname if successful.
+ *
+ * If <b>defaults_file</b> is true, load torrc-defaults; otherwise load torrc.
+ *
+ * Return the contents of the file on success, and NULL on failure.
+ */
+static char *
+load_torrc_from_disk(config_line_t *cmd_arg, int defaults_file)
+{
+ char *fname=NULL;
+ char *cf = NULL;
+ int using_default_torrc = 1;
+ int ignore_missing_torrc = 0;
+ char **fname_var = defaults_file ? &torrc_defaults_fname : &torrc_fname;
+
+ if (*fname_var == NULL) {
+ fname = find_torrc_filename(cmd_arg, defaults_file,
+ &using_default_torrc, &ignore_missing_torrc);
+ tor_free(*fname_var);
+ *fname_var = fname;
+ } else {
+ fname = *fname_var;
+ }
+ log_debug(LD_CONFIG, "Opening config file \"%s\"", fname?fname:"<NULL>");
+
+ /* Open config file */
+ file_status_t st = fname ? file_status(fname) : FN_EMPTY;
+ if (fname == NULL ||
+ !(st == FN_FILE || st == FN_EMPTY) ||
+ !(cf = read_file_to_str(fname,0,NULL))) {
+ if (using_default_torrc == 1 || ignore_missing_torrc) {
+ if (!defaults_file)
+ log_notice(LD_CONFIG, "Configuration file \"%s\" not present, "
+ "using reasonable defaults.", fname);
+ tor_free(fname); /* sets fname to NULL */
+ *fname_var = NULL;
+ cf = tor_strdup("");
+ } else {
+ log_warn(LD_CONFIG,
+ "Unable to open configuration file \"%s\".", fname);
+ goto err;
+ }
+ } else {
+ log_notice(LD_CONFIG, "Read configuration file \"%s\".", fname);
+ }
+
+ return cf;
+ err:
+ tor_free(fname);
+ *fname_var = NULL;
+ return NULL;
+}
+
+/** Read a configuration file into <b>options</b>, finding the configuration
+ * file location based on the command line. After loading the file
+ * call options_init_from_string() to load the config.
+ * Return 0 if success, -1 if failure, and 1 if we succeeded but should exit
+ * anyway. */
+int
+options_init_from_torrc(int argc, char **argv)
+{
+ char *cf=NULL, *cf_defaults=NULL;
+ int command;
+ int retval = -1;
+ char *command_arg = NULL;
+ char *errmsg=NULL;
+ config_line_t *p_index = NULL;
+ config_line_t *cmdline_only_options = NULL;
+
+ /* Go through command-line variables */
+ if (! have_parsed_cmdline) {
+ /* Or we could redo the list every time we pass this place.
+ * It does not really matter */
+ if (config_parse_commandline(argc, argv, 0, &global_cmdline_options,
+ &global_cmdline_only_options) < 0) {
+ goto err;
+ }
+ have_parsed_cmdline = 1;
+ }
+ cmdline_only_options = global_cmdline_only_options;
+
+ if (config_line_find(cmdline_only_options, "-h") ||
+ config_line_find(cmdline_only_options, "--help")) {
+ print_usage();
+ return 1;
+ }
+ if (config_line_find(cmdline_only_options, "--list-torrc-options")) {
+ /* For validating whether we've documented everything. */
+ list_torrc_options();
+ return 1;
+ }
+ if (config_line_find(cmdline_only_options, "--list-deprecated-options")) {
+ /* For validating whether what we have deprecated really exists. */
+ list_deprecated_options();
+ return 1;
+ }
+
+ if (config_line_find(cmdline_only_options, "--version")) {
+ printf("Tor version %s.\n",get_version());
+ return 1;
+ }
+
+ if (config_line_find(cmdline_only_options, "--library-versions")) {
+ printf("Tor version %s. \n", get_version());
+ printf("Library versions\tCompiled\t\tRuntime\n");
+ printf("Libevent\t\t%-15s\t\t%s\n",
+ tor_libevent_get_header_version_str(),
+ tor_libevent_get_version_str());
+#ifdef ENABLE_OPENSSL
+ printf("OpenSSL \t\t%-15s\t\t%s\n",
+ crypto_openssl_get_header_version_str(),
+ crypto_openssl_get_version_str());
+#endif
+#ifdef ENABLE_NSS
+ printf("NSS \t\t%-15s\t\t%s\n",
+ crypto_nss_get_header_version_str(),
+ crypto_nss_get_version_str());
+#endif
+ if (tor_compress_supports_method(ZLIB_METHOD)) {
+ printf("Zlib \t\t%-15s\t\t%s\n",
+ tor_compress_version_str(ZLIB_METHOD),
+ tor_compress_header_version_str(ZLIB_METHOD));
+ }
+ if (tor_compress_supports_method(LZMA_METHOD)) {
+ printf("Liblzma \t\t%-15s\t\t%s\n",
+ tor_compress_version_str(LZMA_METHOD),
+ tor_compress_header_version_str(LZMA_METHOD));
+ }
+ if (tor_compress_supports_method(ZSTD_METHOD)) {
+ printf("Libzstd \t\t%-15s\t\t%s\n",
+ tor_compress_version_str(ZSTD_METHOD),
+ tor_compress_header_version_str(ZSTD_METHOD));
+ }
+ //TODO: Hex versions?
+ return 1;
+ }
+
+ command = CMD_RUN_TOR;
+ for (p_index = cmdline_only_options; p_index; p_index = p_index->next) {
+ if (!strcmp(p_index->key,"--keygen")) {
+ command = CMD_KEYGEN;
+ } else if (!strcmp(p_index->key, "--key-expiration")) {
+ command = CMD_KEY_EXPIRATION;
+ command_arg = p_index->value;
+ } else if (!strcmp(p_index->key,"--list-fingerprint")) {
+ command = CMD_LIST_FINGERPRINT;
+ } else if (!strcmp(p_index->key, "--hash-password")) {
+ command = CMD_HASH_PASSWORD;
+ command_arg = p_index->value;
+ } else if (!strcmp(p_index->key, "--dump-config")) {
+ command = CMD_DUMP_CONFIG;
+ command_arg = p_index->value;
+ } else if (!strcmp(p_index->key, "--verify-config")) {
+ command = CMD_VERIFY_CONFIG;
+ }
+ }
+
+ if (command == CMD_HASH_PASSWORD) {
+ cf_defaults = tor_strdup("");
+ cf = tor_strdup("");
+ } else {
+ cf_defaults = load_torrc_from_disk(cmdline_only_options, 1);
+
+ const config_line_t *f_line = config_line_find(cmdline_only_options,
+ "-f");
+
+ const int read_torrc_from_stdin =
+ (f_line != NULL && strcmp(f_line->value, "-") == 0);
+
+ if (read_torrc_from_stdin) {
+ cf = load_torrc_from_stdin();
+ } else {
+ cf = load_torrc_from_disk(cmdline_only_options, 0);
+ }
+
+ if (!cf) {
+ if (config_line_find(cmdline_only_options, "--allow-missing-torrc")) {
+ cf = tor_strdup("");
+ } else {
+ goto err;
+ }
+ }
+ }
+
+ retval = options_init_from_string(cf_defaults, cf, command, command_arg,
+ &errmsg);
+
+ if (retval < 0)
+ goto err;
+
+ if (config_line_find(cmdline_only_options, "--no-passphrase")) {
+ if (command == CMD_KEYGEN) {
+ get_options_mutable()->keygen_force_passphrase = FORCE_PASSPHRASE_OFF;
+ } else {
+ log_err(LD_CONFIG, "--no-passphrase specified without --keygen!");
+ retval = -1;
+ goto err;
+ }
+ }
+
+ if (config_line_find(cmdline_only_options, "--newpass")) {
+ if (command == CMD_KEYGEN) {
+ get_options_mutable()->change_key_passphrase = 1;
+ } else {
+ log_err(LD_CONFIG, "--newpass specified without --keygen!");
+ retval = -1;
+ goto err;
+ }
+ }
+
+ {
+ const config_line_t *fd_line = config_line_find(cmdline_only_options,
+ "--passphrase-fd");
+ if (fd_line) {
+ if (get_options()->keygen_force_passphrase == FORCE_PASSPHRASE_OFF) {
+ log_err(LD_CONFIG, "--no-passphrase specified with --passphrase-fd!");
+ retval = -1;
+ goto err;
+ } else if (command != CMD_KEYGEN) {
+ log_err(LD_CONFIG, "--passphrase-fd specified without --keygen!");
+ retval = -1;
+ goto err;
+ } else {
+ const char *v = fd_line->value;
+ int ok = 1;
+ long fd = tor_parse_long(v, 10, 0, INT_MAX, &ok, NULL);
+ if (fd < 0 || ok == 0) {
+ log_err(LD_CONFIG, "Invalid --passphrase-fd value %s", escaped(v));
+ retval = -1;
+ goto err;
+ }
+ get_options_mutable()->keygen_passphrase_fd = (int)fd;
+ get_options_mutable()->use_keygen_passphrase_fd = 1;
+ get_options_mutable()->keygen_force_passphrase = FORCE_PASSPHRASE_ON;
+ }
+ }
+ }
+
+ {
+ const config_line_t *key_line = config_line_find(cmdline_only_options,
+ "--master-key");
+ if (key_line) {
+ if (command != CMD_KEYGEN) {
+ log_err(LD_CONFIG, "--master-key without --keygen!");
+ retval = -1;
+ goto err;
+ } else {
+ get_options_mutable()->master_key_fname = tor_strdup(key_line->value);
+ }
+ }
+ }
+
+ err:
+
+ tor_free(cf);
+ tor_free(cf_defaults);
+ if (errmsg) {
+ log_warn(LD_CONFIG,"%s", errmsg);
+ tor_free(errmsg);
+ }
+ return retval < 0 ? -1 : 0;
+}
+
+/** Load the options from the configuration in <b>cf</b>, validate
+ * them for consistency and take actions based on them.
+ *
+ * Return 0 if success, negative on error:
+ * * -1 for general errors.
+ * * -2 for failure to parse/validate,
+ * * -3 for transition not allowed
+ * * -4 for error while setting the new options
+ */
+setopt_err_t
+options_init_from_string(const char *cf_defaults, const char *cf,
+ int command, const char *command_arg,
+ char **msg)
+{
+ or_options_t *oldoptions, *newoptions, *newdefaultoptions=NULL;
+ config_line_t *cl;
+ int retval;
+ setopt_err_t err = SETOPT_ERR_MISC;
+ int cf_has_include = 0;
+ tor_assert(msg);
+
+ oldoptions = global_options; /* get_options unfortunately asserts if
+ this is the first time we run*/
+
+ newoptions = tor_malloc_zero(sizeof(or_options_t));
+ newoptions->magic_ = OR_OPTIONS_MAGIC;
+ options_init(newoptions);
+ newoptions->command = command;
+ newoptions->command_arg = command_arg ? tor_strdup(command_arg) : NULL;
+
+ smartlist_t *opened_files = smartlist_new();
+ for (int i = 0; i < 2; ++i) {
+ const char *body = i==0 ? cf_defaults : cf;
+ if (!body)
+ continue;
+
+ /* get config lines, assign them */
+ retval = config_get_lines_include(body, &cl, 1,
+ body == cf ? &cf_has_include : NULL,
+ opened_files);
+ if (retval < 0) {
+ err = SETOPT_ERR_PARSE;
+ goto err;
+ }
+ retval = config_assign(&options_format, newoptions, cl,
+ CAL_WARN_DEPRECATIONS, msg);
+ config_free_lines(cl);
+ if (retval < 0) {
+ err = SETOPT_ERR_PARSE;
+ goto err;
+ }
+ if (i==0)
+ newdefaultoptions = config_dup(&options_format, newoptions);
+ }
+
+ if (newdefaultoptions == NULL) {
+ newdefaultoptions = config_dup(&options_format, global_default_options);
+ }
+
+ /* Go through command-line variables too */
+ retval = config_assign(&options_format, newoptions,
+ global_cmdline_options, CAL_WARN_DEPRECATIONS, msg);
+ if (retval < 0) {
+ err = SETOPT_ERR_PARSE;
+ goto err;
+ }
+
+ newoptions->IncludeUsed = cf_has_include;
+ newoptions->FilesOpenedByIncludes = opened_files;
+
+ /* If this is a testing network configuration, change defaults
+ * for a list of dependent config options, re-initialize newoptions
+ * with the new defaults, and assign all options to it second time. */
+ if (newoptions->TestingTorNetwork) {
+ /* XXXX this is a bit of a kludge. perhaps there's a better way to do
+ * this? We could, for example, make the parsing algorithm do two passes
+ * over the configuration. If it finds any "suite" options like
+ * TestingTorNetwork, it could change the defaults before its second pass.
+ * Not urgent so long as this seems to work, but at any sign of trouble,
+ * let's clean it up. -NM */
+
+ /* Change defaults. */
+ for (int i = 0; testing_tor_network_defaults[i].name; ++i) {
+ const config_var_t *new_var = &testing_tor_network_defaults[i];
+ config_var_t *old_var =
+ config_find_option_mutable(&options_format, new_var->name);
+ tor_assert(new_var);
+ tor_assert(old_var);
+ old_var->initvalue = new_var->initvalue;
+
+ if ((config_find_deprecation(&options_format, new_var->name))) {
+ log_warn(LD_GENERAL, "Testing options override the deprecated "
+ "option %s. Is that intentional?",
+ new_var->name);
+ }
+ }
+
+ /* Clear newoptions and re-initialize them with new defaults. */
+ or_options_free(newoptions);
+ or_options_free(newdefaultoptions);
+ newdefaultoptions = NULL;
+ newoptions = tor_malloc_zero(sizeof(or_options_t));
+ newoptions->magic_ = OR_OPTIONS_MAGIC;
+ options_init(newoptions);
+ newoptions->command = command;
+ newoptions->command_arg = command_arg ? tor_strdup(command_arg) : NULL;
+
+ /* Assign all options a second time. */
+ opened_files = smartlist_new();
+ for (int i = 0; i < 2; ++i) {
+ const char *body = i==0 ? cf_defaults : cf;
+ if (!body)
+ continue;
+
+ /* get config lines, assign them */
+ retval = config_get_lines_include(body, &cl, 1,
+ body == cf ? &cf_has_include : NULL,
+ opened_files);
+ if (retval < 0) {
+ err = SETOPT_ERR_PARSE;
+ goto err;
+ }
+ retval = config_assign(&options_format, newoptions, cl, 0, msg);
+ config_free_lines(cl);
+ if (retval < 0) {
+ err = SETOPT_ERR_PARSE;
+ goto err;
+ }
+ if (i==0)
+ newdefaultoptions = config_dup(&options_format, newoptions);
+ }
+ /* Assign command-line variables a second time too */
+ retval = config_assign(&options_format, newoptions,
+ global_cmdline_options, 0, msg);
+ if (retval < 0) {
+ err = SETOPT_ERR_PARSE;
+ goto err;
+ }
+ }
+
+ newoptions->IncludeUsed = cf_has_include;
+ in_option_validation = 1;
+ newoptions->FilesOpenedByIncludes = opened_files;
+
+ /* Validate newoptions */
+ if (options_validate(oldoptions, newoptions, newdefaultoptions,
+ 0, msg) < 0) {
+ err = SETOPT_ERR_PARSE; /*XXX make this a separate return value.*/
+ goto err;
+ }
+
+ if (options_transition_allowed(oldoptions, newoptions, msg) < 0) {
+ err = SETOPT_ERR_TRANSITION;
+ goto err;
+ }
+ in_option_validation = 0;
+
+ if (set_options(newoptions, msg)) {
+ err = SETOPT_ERR_SETTING;
+ goto err; /* frees and replaces old options */
+ }
+
+ or_options_free(global_default_options);
+ global_default_options = newdefaultoptions;
+
+ return SETOPT_OK;
+
+ err:
+ in_option_validation = 0;
+ if (opened_files) {
+ SMARTLIST_FOREACH(opened_files, char *, f, tor_free(f));
+ smartlist_free(opened_files);
+ }
+ // may have been set to opened_files, avoid double free
+ newoptions->FilesOpenedByIncludes = NULL;
+ or_options_free(newoptions);
+ or_options_free(newdefaultoptions);
+ if (*msg) {
+ char *old_msg = *msg;
+ tor_asprintf(msg, "Failed to parse/validate config: %s", old_msg);
+ tor_free(old_msg);
+ }
+ return err;
+}
+
+/** Return the location for our configuration file. May return NULL.
+ */
+const char *
+get_torrc_fname(int defaults_fname)
+{
+ const char *fname = defaults_fname ? torrc_defaults_fname : torrc_fname;
+
+ if (fname)
+ return fname;
+ else
+ return get_default_conf_file(defaults_fname);
+}
+
+/** Adjust the address map based on the MapAddress elements in the
+ * configuration <b>options</b>
+ */
+void
+config_register_addressmaps(const or_options_t *options)
+{
+ smartlist_t *elts;
+ config_line_t *opt;
+ const char *from, *to, *msg;
+
+ addressmap_clear_configured();
+ elts = smartlist_new();
+ for (opt = options->AddressMap; opt; opt = opt->next) {
+ smartlist_split_string(elts, opt->value, NULL,
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 2);
+ if (smartlist_len(elts) < 2) {
+ log_warn(LD_CONFIG,"MapAddress '%s' has too few arguments. Ignoring.",
+ opt->value);
+ goto cleanup;
+ }
+
+ from = smartlist_get(elts,0);
+ to = smartlist_get(elts,1);
+
+ if (to[0] == '.' || from[0] == '.') {
+ log_warn(LD_CONFIG,"MapAddress '%s' is ambiguous - address starts with a"
+ "'.'. Ignoring.",opt->value);
+ goto cleanup;
+ }
+
+ if (addressmap_register_auto(from, to, 0, ADDRMAPSRC_TORRC, &msg) < 0) {
+ log_warn(LD_CONFIG,"MapAddress '%s' failed: %s. Ignoring.", opt->value,
+ msg);
+ goto cleanup;
+ }
+
+ if (smartlist_len(elts) > 2)
+ log_warn(LD_CONFIG,"Ignoring extra arguments to MapAddress.");
+
+ cleanup:
+ SMARTLIST_FOREACH(elts, char*, cp, tor_free(cp));
+ smartlist_clear(elts);
+ }
+ smartlist_free(elts);
+}
+
+/** As addressmap_register(), but detect the wildcarded status of "from" and
+ * "to", and do not steal a reference to <b>to</b>. */
+/* XXXX move to connection_edge.c */
+int
+addressmap_register_auto(const char *from, const char *to,
+ time_t expires,
+ addressmap_entry_source_t addrmap_source,
+ const char **msg)
+{
+ int from_wildcard = 0, to_wildcard = 0;
+
+ *msg = "whoops, forgot the error message";
+
+ if (!strcmp(to, "*") || !strcmp(from, "*")) {
+ *msg = "can't remap from or to *";
+ return -1;
+ }
+ /* Detect asterisks in expressions of type: '*.example.com' */
+ if (!strncmp(from,"*.",2)) {
+ from += 2;
+ from_wildcard = 1;
+ }
+ if (!strncmp(to,"*.",2)) {
+ to += 2;
+ to_wildcard = 1;
+ }
+
+ if (to_wildcard && !from_wildcard) {
+ *msg = "can only use wildcard (i.e. '*.') if 'from' address "
+ "uses wildcard also";
+ return -1;
+ }
+
+ if (address_is_invalid_destination(to, 1)) {
+ *msg = "destination is invalid";
+ return -1;
+ }
+
+ addressmap_register(from, tor_strdup(to), expires, addrmap_source,
+ from_wildcard, to_wildcard);
+
+ return 0;
+}
+
+/**
+ * As add_file_log, but open the file as appropriate.
+ */
+STATIC int
+open_and_add_file_log(const log_severity_list_t *severity,
+ const char *filename, int truncate_log)
+{
+ int open_flags = O_WRONLY|O_CREAT;
+ open_flags |= truncate_log ? O_TRUNC : O_APPEND;
+
+ int fd = tor_open_cloexec(filename, open_flags, 0640);
+ if (fd < 0)
+ return -1;
+
+ return add_file_log(severity, filename, fd);
+}
+
+/**
+ * Initialize the logs based on the configuration file.
+ */
+static int
+options_init_logs(const or_options_t *old_options, or_options_t *options,
+ int validate_only)
+{
+ config_line_t *opt;
+ int ok;
+ smartlist_t *elts;
+ int run_as_daemon =
+#ifdef _WIN32
+ 0;
+#else
+ options->RunAsDaemon;
+#endif
+
+ if (options->LogTimeGranularity <= 0) {
+ log_warn(LD_CONFIG, "Log time granularity '%d' has to be positive.",
+ options->LogTimeGranularity);
+ return -1;
+ } else if (1000 % options->LogTimeGranularity != 0 &&
+ options->LogTimeGranularity % 1000 != 0) {
+ int granularity = options->LogTimeGranularity;
+ if (granularity < 40) {
+ do granularity++;
+ while (1000 % granularity != 0);
+ } else if (granularity < 1000) {
+ granularity = 1000 / granularity;
+ while (1000 % granularity != 0)
+ granularity--;
+ granularity = 1000 / granularity;
+ } else {
+ granularity = 1000 * ((granularity / 1000) + 1);
+ }
+ log_warn(LD_CONFIG, "Log time granularity '%d' has to be either a "
+ "divisor or a multiple of 1 second. Changing to "
+ "'%d'.",
+ options->LogTimeGranularity, granularity);
+ if (!validate_only)
+ set_log_time_granularity(granularity);
+ } else {
+ if (!validate_only)
+ set_log_time_granularity(options->LogTimeGranularity);
+ }
+
+ ok = 1;
+ elts = smartlist_new();
+
+ for (opt = options->Logs; opt; opt = opt->next) {
+ log_severity_list_t *severity;
+ const char *cfg = opt->value;
+ severity = tor_malloc_zero(sizeof(log_severity_list_t));
+ if (parse_log_severity_config(&cfg, severity) < 0) {
+ log_warn(LD_CONFIG, "Couldn't parse log levels in Log option 'Log %s'",
+ opt->value);
+ ok = 0; goto cleanup;
+ }
+
+ smartlist_split_string(elts, cfg, NULL,
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 2);
+
+ if (smartlist_len(elts) == 0)
+ smartlist_add_strdup(elts, "stdout");
+
+ if (smartlist_len(elts) == 1 &&
+ (!strcasecmp(smartlist_get(elts,0), "stdout") ||
+ !strcasecmp(smartlist_get(elts,0), "stderr"))) {
+ int err = smartlist_len(elts) &&
+ !strcasecmp(smartlist_get(elts,0), "stderr");
+ if (!validate_only) {
+ if (run_as_daemon) {
+ log_warn(LD_CONFIG,
+ "Can't log to %s with RunAsDaemon set; skipping stdout",
+ err?"stderr":"stdout");
+ } else {
+ add_stream_log(severity, err?"<stderr>":"<stdout>",
+ fileno(err?stderr:stdout));
+ }
+ }
+ goto cleanup;
+ }
+ if (smartlist_len(elts) == 1) {
+ if (!strcasecmp(smartlist_get(elts,0), "syslog")) {
+#ifdef HAVE_SYSLOG_H
+ if (!validate_only) {
+ add_syslog_log(severity, options->SyslogIdentityTag);
+ }
+#else
+ log_warn(LD_CONFIG, "Syslog is not supported on this system. Sorry.");
+#endif /* defined(HAVE_SYSLOG_H) */
+ goto cleanup;
+ }
+
+ if (!strcasecmp(smartlist_get(elts, 0), "android")) {
+#ifdef HAVE_ANDROID_LOG_H
+ if (!validate_only) {
+ add_android_log(severity, options->AndroidIdentityTag);
+ }
+#else
+ log_warn(LD_CONFIG, "Android logging is not supported"
+ " on this system. Sorry.");
+#endif // HAVE_ANDROID_LOG_H.
+ goto cleanup;
+ }
+ }
+
+ if (smartlist_len(elts) == 2 &&
+ !strcasecmp(smartlist_get(elts,0), "file")) {
+ if (!validate_only) {
+ char *fname = expand_filename(smartlist_get(elts, 1));
+ /* Truncate if TruncateLogFile is set and we haven't seen this option
+ line before. */
+ int truncate_log = 0;
+ if (options->TruncateLogFile) {
+ truncate_log = 1;
+ if (old_options) {
+ config_line_t *opt2;
+ for (opt2 = old_options->Logs; opt2; opt2 = opt2->next)
+ if (!strcmp(opt->value, opt2->value)) {
+ truncate_log = 0;
+ break;
+ }
+ }
+ }
+ if (open_and_add_file_log(severity, fname, truncate_log) < 0) {
+ log_warn(LD_CONFIG, "Couldn't open file for 'Log %s': %s",
+ opt->value, strerror(errno));
+ ok = 0;
+ }
+ tor_free(fname);
+ }
+ goto cleanup;
+ }
+
+ log_warn(LD_CONFIG, "Bad syntax on file Log option 'Log %s'",
+ opt->value);
+ ok = 0; goto cleanup;
+
+ cleanup:
+ SMARTLIST_FOREACH(elts, char*, cp, tor_free(cp));
+ smartlist_clear(elts);
+ tor_free(severity);
+ }
+ smartlist_free(elts);
+
+ if (ok && !validate_only)
+ logs_set_domain_logging(options->LogMessageDomains);
+
+ return ok?0:-1;
+}
+
+/** Given a smartlist of SOCKS arguments to be passed to a transport
+ * proxy in <b>args</b>, validate them and return -1 if they are
+ * corrupted. Return 0 if they seem OK. */
+static int
+validate_transport_socks_arguments(const smartlist_t *args)
+{
+ char *socks_string = NULL;
+ size_t socks_string_len;
+
+ tor_assert(args);
+ tor_assert(smartlist_len(args) > 0);
+
+ SMARTLIST_FOREACH_BEGIN(args, const char *, s) {
+ if (!string_is_key_value(LOG_WARN, s)) { /* items should be k=v items */
+ log_warn(LD_CONFIG, "'%s' is not a k=v item.", s);
+ return -1;
+ }
+ } SMARTLIST_FOREACH_END(s);
+
+ socks_string = pt_stringify_socks_args(args);
+ if (!socks_string)
+ return -1;
+
+ socks_string_len = strlen(socks_string);
+ tor_free(socks_string);
+
+ if (socks_string_len > MAX_SOCKS5_AUTH_SIZE_TOTAL) {
+ log_warn(LD_CONFIG, "SOCKS arguments can't be more than %u bytes (%lu).",
+ MAX_SOCKS5_AUTH_SIZE_TOTAL,
+ (unsigned long) socks_string_len);
+ return -1;
+ }
+
+ return 0;
+}
+
+/** Deallocate a bridge_line_t structure. */
+/* private */ void
+bridge_line_free_(bridge_line_t *bridge_line)
+{
+ if (!bridge_line)
+ return;
+
+ if (bridge_line->socks_args) {
+ SMARTLIST_FOREACH(bridge_line->socks_args, char*, s, tor_free(s));
+ smartlist_free(bridge_line->socks_args);
+ }
+ tor_free(bridge_line->transport_name);
+ tor_free(bridge_line);
+}
+
+/** Parse the contents of a string, <b>line</b>, containing a Bridge line,
+ * into a bridge_line_t.
+ *
+ * Validates that the IP:PORT, fingerprint, and SOCKS arguments (given to the
+ * Pluggable Transport, if a one was specified) are well-formed.
+ *
+ * Returns NULL If the Bridge line could not be validated, and returns a
+ * bridge_line_t containing the parsed information otherwise.
+ *
+ * Bridge line format:
+ * Bridge [transport] IP:PORT [id-fingerprint] [k=v] [k=v] ...
+ */
+/* private */ bridge_line_t *
+parse_bridge_line(const char *line)
+{
+ smartlist_t *items = NULL;
+ char *addrport=NULL, *fingerprint=NULL;
+ char *field=NULL;
+ bridge_line_t *bridge_line = tor_malloc_zero(sizeof(bridge_line_t));
+
+ items = smartlist_new();
+ smartlist_split_string(items, line, NULL,
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, -1);
+ if (smartlist_len(items) < 1) {
+ log_warn(LD_CONFIG, "Too few arguments to Bridge line.");
+ goto err;
+ }
+
+ /* first field is either a transport name or addrport */
+ field = smartlist_get(items, 0);
+ smartlist_del_keeporder(items, 0);
+
+ if (string_is_C_identifier(field)) {
+ /* It's a transport name. */
+ bridge_line->transport_name = field;
+ if (smartlist_len(items) < 1) {
+ log_warn(LD_CONFIG, "Too few items to Bridge line.");
+ goto err;
+ }
+ addrport = smartlist_get(items, 0); /* Next field is addrport then. */
+ smartlist_del_keeporder(items, 0);
+ } else {
+ addrport = field;
+ }
+
+ if (tor_addr_port_parse(LOG_INFO, addrport,
+ &bridge_line->addr, &bridge_line->port, 443)<0) {
+ log_warn(LD_CONFIG, "Error parsing Bridge address '%s'", addrport);
+ goto err;
+ }
+
+ /* If transports are enabled, next field could be a fingerprint or a
+ socks argument. If transports are disabled, next field must be
+ a fingerprint. */
+ if (smartlist_len(items)) {
+ if (bridge_line->transport_name) { /* transports enabled: */
+ field = smartlist_get(items, 0);
+ smartlist_del_keeporder(items, 0);
+
+ /* If it's a key=value pair, then it's a SOCKS argument for the
+ transport proxy... */
+ if (string_is_key_value(LOG_DEBUG, field)) {
+ bridge_line->socks_args = smartlist_new();
+ smartlist_add(bridge_line->socks_args, field);
+ } else { /* ...otherwise, it's the bridge fingerprint. */
+ fingerprint = field;
+ }
+
+ } else { /* transports disabled: */
+ fingerprint = smartlist_join_strings(items, "", 0, NULL);
+ }
+ }
+
+ /* Handle fingerprint, if it was provided. */
+ if (fingerprint) {
+ if (strlen(fingerprint) != HEX_DIGEST_LEN) {
+ log_warn(LD_CONFIG, "Key digest for Bridge is wrong length.");
+ goto err;
+ }
+ if (base16_decode(bridge_line->digest, DIGEST_LEN,
+ fingerprint, HEX_DIGEST_LEN) != DIGEST_LEN) {
+ log_warn(LD_CONFIG, "Unable to decode Bridge key digest.");
+ goto err;
+ }
+ }
+
+ /* If we are using transports, any remaining items in the smartlist
+ should be k=v values. */
+ if (bridge_line->transport_name && smartlist_len(items)) {
+ if (!bridge_line->socks_args)
+ bridge_line->socks_args = smartlist_new();
+
+ /* append remaining items of 'items' to 'socks_args' */
+ smartlist_add_all(bridge_line->socks_args, items);
+ smartlist_clear(items);
+
+ tor_assert(smartlist_len(bridge_line->socks_args) > 0);
+ }
+
+ if (bridge_line->socks_args) {
+ if (validate_transport_socks_arguments(bridge_line->socks_args) < 0)
+ goto err;
+ }
+
+ goto done;
+
+ err:
+ bridge_line_free(bridge_line);
+ bridge_line = NULL;
+
+ done:
+ SMARTLIST_FOREACH(items, char*, s, tor_free(s));
+ smartlist_free(items);
+ tor_free(addrport);
+ tor_free(fingerprint);
+
+ return bridge_line;
+}
+
+/** Read the contents of a ClientTransportPlugin or ServerTransportPlugin
+ * line from <b>line</b>, depending on the value of <b>server</b>. Return 0
+ * if the line is well-formed, and -1 if it isn't.
+ *
+ * If <b>validate_only</b> is 0, the line is well-formed, and the transport is
+ * needed by some bridge:
+ * - If it's an external proxy line, add the transport described in the line to
+ * our internal transport list.
+ * - If it's a managed proxy line, launch the managed proxy.
+ */
+
+STATIC int
+parse_transport_line(const or_options_t *options,
+ const char *line, int validate_only,
+ int server)
+{
+
+ smartlist_t *items = NULL;
+ int r;
+ const char *transports = NULL;
+ smartlist_t *transport_list = NULL;
+ char *type = NULL;
+ char *addrport = NULL;
+ tor_addr_t addr;
+ uint16_t port = 0;
+ int socks_ver = PROXY_NONE;
+
+ /* managed proxy options */
+ int is_managed = 0;
+ char **proxy_argv = NULL;
+ char **tmp = NULL;
+ int proxy_argc, i;
+ int is_useless_proxy = 1;
+
+ int line_length;
+
+ /* Split the line into space-separated tokens */
+ items = smartlist_new();
+ smartlist_split_string(items, line, NULL,
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, -1);
+ line_length = smartlist_len(items);
+
+ if (line_length < 3) {
+ log_warn(LD_CONFIG,
+ "Too few arguments on %sTransportPlugin line.",
+ server ? "Server" : "Client");
+ goto err;
+ }
+
+ /* Get the first line element, split it to commas into
+ transport_list (in case it's multiple transports) and validate
+ the transport names. */
+ transports = smartlist_get(items, 0);
+ transport_list = smartlist_new();
+ smartlist_split_string(transport_list, transports, ",",
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
+ SMARTLIST_FOREACH_BEGIN(transport_list, const char *, transport_name) {
+ /* validate transport names */
+ if (!string_is_C_identifier(transport_name)) {
+ log_warn(LD_CONFIG, "Transport name is not a C identifier (%s).",
+ transport_name);
+ goto err;
+ }
+
+ /* see if we actually need the transports provided by this proxy */
+ if (!validate_only && transport_is_needed(transport_name))
+ is_useless_proxy = 0;
+ } SMARTLIST_FOREACH_END(transport_name);
+
+ type = smartlist_get(items, 1);
+ if (!strcmp(type, "exec")) {
+ is_managed = 1;
+ } else if (server && !strcmp(type, "proxy")) {
+ /* 'proxy' syntax only with ServerTransportPlugin */
+ is_managed = 0;
+ } else if (!server && !strcmp(type, "socks4")) {
+ /* 'socks4' syntax only with ClientTransportPlugin */
+ is_managed = 0;
+ socks_ver = PROXY_SOCKS4;
+ } else if (!server && !strcmp(type, "socks5")) {
+ /* 'socks5' syntax only with ClientTransportPlugin */
+ is_managed = 0;
+ socks_ver = PROXY_SOCKS5;
+ } else {
+ log_warn(LD_CONFIG,
+ "Strange %sTransportPlugin type '%s'",
+ server ? "Server" : "Client", type);
+ goto err;
+ }
+
+ if (is_managed && options->Sandbox) {
+ log_warn(LD_CONFIG,
+ "Managed proxies are not compatible with Sandbox mode."
+ "(%sTransportPlugin line was %s)",
+ server ? "Server" : "Client", escaped(line));
+ goto err;
+ }
+
+ if (is_managed && options->NoExec) {
+ log_warn(LD_CONFIG,
+ "Managed proxies are not compatible with NoExec mode; ignoring."
+ "(%sTransportPlugin line was %s)",
+ server ? "Server" : "Client", escaped(line));
+ r = 0;
+ goto done;
+ }
+
+ if (is_managed) {
+ /* managed */
+
+ if (!server && !validate_only && is_useless_proxy) {
+ log_info(LD_GENERAL,
+ "Pluggable transport proxy (%s) does not provide "
+ "any needed transports and will not be launched.",
+ line);
+ }
+
+ /*
+ * If we are not just validating, use the rest of the line as the
+ * argv of the proxy to be launched. Also, make sure that we are
+ * only launching proxies that contribute useful transports.
+ */
+
+ if (!validate_only && (server || !is_useless_proxy)) {
+ proxy_argc = line_length - 2;
+ tor_assert(proxy_argc > 0);
+ proxy_argv = tor_calloc((proxy_argc + 1), sizeof(char *));
+ tmp = proxy_argv;
+
+ for (i = 0; i < proxy_argc; i++) {
+ /* store arguments */
+ *tmp++ = smartlist_get(items, 2);
+ smartlist_del_keeporder(items, 2);
+ }
+ *tmp = NULL; /* terminated with NULL, just like execve() likes it */
+
+ /* kickstart the thing */
+ if (server) {
+ pt_kickstart_server_proxy(transport_list, proxy_argv);
+ } else {
+ pt_kickstart_client_proxy(transport_list, proxy_argv);
+ }
+ }
+ } else {
+ /* external */
+
+ /* ClientTransportPlugins connecting through a proxy is managed only. */
+ if (!server && (options->Socks4Proxy || options->Socks5Proxy ||
+ options->HTTPSProxy)) {
+ log_warn(LD_CONFIG, "You have configured an external proxy with another "
+ "proxy type. (Socks4Proxy|Socks5Proxy|HTTPSProxy)");
+ goto err;
+ }
+
+ if (smartlist_len(transport_list) != 1) {
+ log_warn(LD_CONFIG,
+ "You can't have an external proxy with more than "
+ "one transport.");
+ goto err;
+ }
+
+ addrport = smartlist_get(items, 2);
+
+ if (tor_addr_port_lookup(addrport, &addr, &port) < 0) {
+ log_warn(LD_CONFIG,
+ "Error parsing transport address '%s'", addrport);
+ goto err;
+ }
+
+ if (!port) {
+ log_warn(LD_CONFIG,
+ "Transport address '%s' has no port.", addrport);
+ goto err;
+ }
+
+ if (!validate_only) {
+ log_info(LD_DIR, "%s '%s' at %s.",
+ server ? "Server transport" : "Transport",
+ transports, fmt_addrport(&addr, port));
+
+ if (!server) {
+ transport_add_from_config(&addr, port,
+ smartlist_get(transport_list, 0),
+ socks_ver);
+ }
+ }
+ }
+
+ r = 0;
+ goto done;
+
+ err:
+ r = -1;
+
+ done:
+ SMARTLIST_FOREACH(items, char*, s, tor_free(s));
+ smartlist_free(items);
+ if (transport_list) {
+ SMARTLIST_FOREACH(transport_list, char*, s, tor_free(s));
+ smartlist_free(transport_list);
+ }
+
+ return r;
+}
+
+/** Given a ServerTransportListenAddr <b>line</b>, return its
+ * <address:port> string. Return NULL if the line was not
+ * well-formed.
+ *
+ * If <b>transport</b> is set, return NULL if the line is not
+ * referring to <b>transport</b>.
+ *
+ * The returned string is allocated on the heap and it's the
+ * responsibility of the caller to free it. */
+static char *
+get_bindaddr_from_transport_listen_line(const char *line,const char *transport)
+{
+ smartlist_t *items = NULL;
+ const char *parsed_transport = NULL;
+ char *addrport = NULL;
+ tor_addr_t addr;
+ uint16_t port = 0;
+
+ items = smartlist_new();
+ smartlist_split_string(items, line, NULL,
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, -1);
+
+ if (smartlist_len(items) < 2) {
+ log_warn(LD_CONFIG,"Too few arguments on ServerTransportListenAddr line.");
+ goto err;
+ }
+
+ parsed_transport = smartlist_get(items, 0);
+ addrport = tor_strdup(smartlist_get(items, 1));
+
+ /* If 'transport' is given, check if it matches the one on the line */
+ if (transport && strcmp(transport, parsed_transport))
+ goto err;
+
+ /* Validate addrport */
+ if (tor_addr_port_parse(LOG_WARN, addrport, &addr, &port, -1)<0) {
+ log_warn(LD_CONFIG, "Error parsing ServerTransportListenAddr "
+ "address '%s'", addrport);
+ goto err;
+ }
+
+ goto done;
+
+ err:
+ tor_free(addrport);
+ addrport = NULL;
+
+ done:
+ SMARTLIST_FOREACH(items, char*, s, tor_free(s));
+ smartlist_free(items);
+
+ return addrport;
+}
+
+/** Given a ServerTransportOptions <b>line</b>, return a smartlist
+ * with the options. Return NULL if the line was not well-formed.
+ *
+ * If <b>transport</b> is set, return NULL if the line is not
+ * referring to <b>transport</b>.
+ *
+ * The returned smartlist and its strings are allocated on the heap
+ * and it's the responsibility of the caller to free it. */
+smartlist_t *
+get_options_from_transport_options_line(const char *line,const char *transport)
+{
+ smartlist_t *items = smartlist_new();
+ smartlist_t *options = smartlist_new();
+ const char *parsed_transport = NULL;
+
+ smartlist_split_string(items, line, NULL,
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, -1);
+
+ if (smartlist_len(items) < 2) {
+ log_warn(LD_CONFIG,"Too few arguments on ServerTransportOptions line.");
+ goto err;
+ }
+
+ parsed_transport = smartlist_get(items, 0);
+ /* If 'transport' is given, check if it matches the one on the line */
+ if (transport && strcmp(transport, parsed_transport))
+ goto err;
+
+ SMARTLIST_FOREACH_BEGIN(items, const char *, option) {
+ if (option_sl_idx == 0) /* skip the transport field (first field)*/
+ continue;
+
+ /* validate that it's a k=v value */
+ if (!string_is_key_value(LOG_WARN, option)) {
+ log_warn(LD_CONFIG, "%s is not a k=v value.", escaped(option));
+ goto err;
+ }
+
+ /* add it to the options smartlist */
+ smartlist_add_strdup(options, option);
+ log_debug(LD_CONFIG, "Added %s to the list of options", escaped(option));
+ } SMARTLIST_FOREACH_END(option);
+
+ goto done;
+
+ err:
+ SMARTLIST_FOREACH(options, char*, s, tor_free(s));
+ smartlist_free(options);
+ options = NULL;
+
+ done:
+ SMARTLIST_FOREACH(items, char*, s, tor_free(s));
+ smartlist_free(items);
+
+ return options;
+}
+
+/** Given the name of a pluggable transport in <b>transport</b>, check
+ * the configuration file to see if the user has explicitly asked for
+ * it to listen on a specific port. Return a <address:port> string if
+ * so, otherwise NULL. */
+char *
+get_transport_bindaddr_from_config(const char *transport)
+{
+ config_line_t *cl;
+ const or_options_t *options = get_options();
+
+ for (cl = options->ServerTransportListenAddr; cl; cl = cl->next) {
+ char *bindaddr =
+ get_bindaddr_from_transport_listen_line(cl->value, transport);
+ if (bindaddr)
+ return bindaddr;
+ }
+
+ return NULL;
+}
+
+/** Given the name of a pluggable transport in <b>transport</b>, check
+ * the configuration file to see if the user has asked us to pass any
+ * parameters to the pluggable transport. Return a smartlist
+ * containing the parameters, otherwise NULL. */
+smartlist_t *
+get_options_for_server_transport(const char *transport)
+{
+ config_line_t *cl;
+ const or_options_t *options = get_options();
+
+ for (cl = options->ServerTransportOptions; cl; cl = cl->next) {
+ smartlist_t *options_sl =
+ get_options_from_transport_options_line(cl->value, transport);
+ if (options_sl)
+ return options_sl;
+ }
+
+ return NULL;
+}
+
+/** Read the contents of a DirAuthority line from <b>line</b>. If
+ * <b>validate_only</b> is 0, and the line is well-formed, and it
+ * shares any bits with <b>required_type</b> or <b>required_type</b>
+ * is NO_DIRINFO (zero), then add the dirserver described in the line
+ * (minus whatever bits it's missing) as a valid authority.
+ * Return 0 on success or filtering out by type,
+ * or -1 if the line isn't well-formed or if we can't add it. */
+STATIC int
+parse_dir_authority_line(const char *line, dirinfo_type_t required_type,
+ int validate_only)
+{
+ smartlist_t *items = NULL;
+ int r;
+ char *addrport=NULL, *address=NULL, *nickname=NULL, *fingerprint=NULL;
+ tor_addr_port_t ipv6_addrport, *ipv6_addrport_ptr = NULL;
+ uint16_t dir_port = 0, or_port = 0;
+ char digest[DIGEST_LEN];
+ char v3_digest[DIGEST_LEN];
+ dirinfo_type_t type = 0;
+ double weight = 1.0;
+
+ memset(v3_digest, 0, sizeof(v3_digest));
+
+ items = smartlist_new();
+ smartlist_split_string(items, line, NULL,
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, -1);
+ if (smartlist_len(items) < 1) {
+ log_warn(LD_CONFIG, "No arguments on DirAuthority line.");
+ goto err;
+ }
+
+ if (is_legal_nickname(smartlist_get(items, 0))) {
+ nickname = smartlist_get(items, 0);
+ smartlist_del_keeporder(items, 0);
+ }
+
+ while (smartlist_len(items)) {
+ char *flag = smartlist_get(items, 0);
+ if (TOR_ISDIGIT(flag[0]))
+ break;
+ if (!strcasecmp(flag, "hs") ||
+ !strcasecmp(flag, "no-hs")) {
+ log_warn(LD_CONFIG, "The DirAuthority options 'hs' and 'no-hs' are "
+ "obsolete; you don't need them any more.");
+ } else if (!strcasecmp(flag, "bridge")) {
+ type |= BRIDGE_DIRINFO;
+ } else if (!strcasecmp(flag, "no-v2")) {
+ /* obsolete, but may still be contained in DirAuthority lines generated
+ by various tools */;
+ } else if (!strcasecmpstart(flag, "orport=")) {
+ int ok;
+ char *portstring = flag + strlen("orport=");
+ or_port = (uint16_t) tor_parse_long(portstring, 10, 1, 65535, &ok, NULL);
+ if (!ok)
+ log_warn(LD_CONFIG, "Invalid orport '%s' on DirAuthority line.",
+ portstring);
+ } else if (!strcmpstart(flag, "weight=")) {
+ int ok;
+ const char *wstring = flag + strlen("weight=");
+ weight = tor_parse_double(wstring, 0, (double)UINT64_MAX, &ok, NULL);
+ if (!ok) {
+ log_warn(LD_CONFIG, "Invalid weight '%s' on DirAuthority line.",flag);
+ weight=1.0;
+ }
+ } else if (!strcasecmpstart(flag, "v3ident=")) {
+ char *idstr = flag + strlen("v3ident=");
+ if (strlen(idstr) != HEX_DIGEST_LEN ||
+ base16_decode(v3_digest, DIGEST_LEN,
+ idstr, HEX_DIGEST_LEN) != DIGEST_LEN) {
+ log_warn(LD_CONFIG, "Bad v3 identity digest '%s' on DirAuthority line",
+ flag);
+ } else {
+ type |= V3_DIRINFO|EXTRAINFO_DIRINFO|MICRODESC_DIRINFO;
+ }
+ } else if (!strcasecmpstart(flag, "ipv6=")) {
+ if (ipv6_addrport_ptr) {
+ log_warn(LD_CONFIG, "Redundant ipv6 addr/port on DirAuthority line");
+ } else {
+ if (tor_addr_port_parse(LOG_WARN, flag+strlen("ipv6="),
+ &ipv6_addrport.addr, &ipv6_addrport.port,
+ -1) < 0
+ || tor_addr_family(&ipv6_addrport.addr) != AF_INET6) {
+ log_warn(LD_CONFIG, "Bad ipv6 addr/port %s on DirAuthority line",
+ escaped(flag));
+ goto err;
+ }
+ ipv6_addrport_ptr = &ipv6_addrport;
+ }
+ } else {
+ log_warn(LD_CONFIG, "Unrecognized flag '%s' on DirAuthority line",
+ flag);
+ }
+ tor_free(flag);
+ smartlist_del_keeporder(items, 0);
+ }
+
+ if (smartlist_len(items) < 2) {
+ log_warn(LD_CONFIG, "Too few arguments to DirAuthority line.");
+ goto err;
+ }
+ addrport = smartlist_get(items, 0);
+ smartlist_del_keeporder(items, 0);
+
+ if (tor_addr_port_split(LOG_WARN, addrport, &address, &dir_port) < 0) {
+ log_warn(LD_CONFIG, "Error parsing DirAuthority address '%s'.", addrport);
+ goto err;
+ }
+
+ if (!string_is_valid_ipv4_address(address)) {
+ log_warn(LD_CONFIG, "Error parsing DirAuthority address '%s' "
+ "(invalid IPv4 address)", address);
+ goto err;
+ }
+
+ if (!dir_port) {
+ log_warn(LD_CONFIG, "Missing port in DirAuthority address '%s'",addrport);
+ goto err;
+ }
+
+ fingerprint = smartlist_join_strings(items, "", 0, NULL);
+ if (strlen(fingerprint) != HEX_DIGEST_LEN) {
+ log_warn(LD_CONFIG, "Key digest '%s' for DirAuthority is wrong length %d.",
+ fingerprint, (int)strlen(fingerprint));
+ goto err;
+ }
+ if (base16_decode(digest, DIGEST_LEN,
+ fingerprint, HEX_DIGEST_LEN) != DIGEST_LEN) {
+ log_warn(LD_CONFIG, "Unable to decode DirAuthority key digest.");
+ goto err;
+ }
+
+ if (!validate_only && (!required_type || required_type & type)) {
+ dir_server_t *ds;
+ if (required_type)
+ type &= required_type; /* pare down what we think of them as an
+ * authority for. */
+ log_debug(LD_DIR, "Trusted %d dirserver at %s:%d (%s)", (int)type,
+ address, (int)dir_port, (char*)smartlist_get(items,0));
+ if (!(ds = trusted_dir_server_new(nickname, address, dir_port, or_port,
+ ipv6_addrport_ptr,
+ digest, v3_digest, type, weight)))
+ goto err;
+ dir_server_add(ds);
+ }
+
+ r = 0;
+ goto done;
+
+ err:
+ r = -1;
+
+ done:
+ SMARTLIST_FOREACH(items, char*, s, tor_free(s));
+ smartlist_free(items);
+ tor_free(addrport);
+ tor_free(address);
+ tor_free(nickname);
+ tor_free(fingerprint);
+ return r;
+}
+
+/** Read the contents of a FallbackDir line from <b>line</b>. If
+ * <b>validate_only</b> is 0, and the line is well-formed, then add the
+ * dirserver described in the line as a fallback directory. Return 0 on
+ * success, or -1 if the line isn't well-formed or if we can't add it. */
+int
+parse_dir_fallback_line(const char *line,
+ int validate_only)
+{
+ int r = -1;
+ smartlist_t *items = smartlist_new(), *positional = smartlist_new();
+ int orport = -1;
+ uint16_t dirport;
+ tor_addr_t addr;
+ int ok;
+ char id[DIGEST_LEN];
+ char *address=NULL;
+ tor_addr_port_t ipv6_addrport, *ipv6_addrport_ptr = NULL;
+ double weight=1.0;
+
+ memset(id, 0, sizeof(id));
+ smartlist_split_string(items, line, NULL,
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, -1);
+ SMARTLIST_FOREACH_BEGIN(items, const char *, cp) {
+ const char *eq = strchr(cp, '=');
+ ok = 1;
+ if (! eq) {
+ smartlist_add(positional, (char*)cp);
+ continue;
+ }
+ if (!strcmpstart(cp, "orport=")) {
+ orport = (int)tor_parse_long(cp+strlen("orport="), 10,
+ 1, 65535, &ok, NULL);
+ } else if (!strcmpstart(cp, "id=")) {
+ ok = base16_decode(id, DIGEST_LEN, cp+strlen("id="),
+ strlen(cp)-strlen("id=")) == DIGEST_LEN;
+ } else if (!strcasecmpstart(cp, "ipv6=")) {
+ if (ipv6_addrport_ptr) {
+ log_warn(LD_CONFIG, "Redundant ipv6 addr/port on FallbackDir line");
+ } else {
+ if (tor_addr_port_parse(LOG_WARN, cp+strlen("ipv6="),
+ &ipv6_addrport.addr, &ipv6_addrport.port,
+ -1) < 0
+ || tor_addr_family(&ipv6_addrport.addr) != AF_INET6) {
+ log_warn(LD_CONFIG, "Bad ipv6 addr/port %s on FallbackDir line",
+ escaped(cp));
+ goto end;
+ }
+ ipv6_addrport_ptr = &ipv6_addrport;
+ }
+ } else if (!strcmpstart(cp, "weight=")) {
+ int num_ok;
+ const char *wstring = cp + strlen("weight=");
+ weight = tor_parse_double(wstring, 0, (double)UINT64_MAX, &num_ok, NULL);
+ if (!num_ok) {
+ log_warn(LD_CONFIG, "Invalid weight '%s' on FallbackDir line.", cp);
+ weight=1.0;
+ }
+ }
+
+ if (!ok) {
+ log_warn(LD_CONFIG, "Bad FallbackDir option %s", escaped(cp));
+ goto end;
+ }
+ } SMARTLIST_FOREACH_END(cp);
+
+ if (smartlist_len(positional) != 1) {
+ log_warn(LD_CONFIG, "Couldn't parse FallbackDir line %s", escaped(line));
+ goto end;
+ }
+
+ if (tor_digest_is_zero(id)) {
+ log_warn(LD_CONFIG, "Missing identity on FallbackDir line");
+ goto end;
+ }
+
+ if (orport <= 0) {
+ log_warn(LD_CONFIG, "Missing orport on FallbackDir line");
+ goto end;
+ }
+
+ if (tor_addr_port_split(LOG_INFO, smartlist_get(positional, 0),
+ &address, &dirport) < 0 ||
+ tor_addr_parse(&addr, address)<0) {
+ log_warn(LD_CONFIG, "Couldn't parse address:port %s on FallbackDir line",
+ (const char*)smartlist_get(positional, 0));
+ goto end;
+ }
+
+ if (!validate_only) {
+ dir_server_t *ds;
+ ds = fallback_dir_server_new(&addr, dirport, orport, ipv6_addrport_ptr,
+ id, weight);
+ if (!ds) {
+ log_warn(LD_CONFIG, "Couldn't create FallbackDir %s", escaped(line));
+ goto end;
+ }
+ dir_server_add(ds);
+ }
+
+ r = 0;
+
+ end:
+ SMARTLIST_FOREACH(items, char *, cp, tor_free(cp));
+ smartlist_free(items);
+ smartlist_free(positional);
+ tor_free(address);
+ return r;
+}
+
+/** Allocate and return a new port_cfg_t with reasonable defaults. */
+STATIC port_cfg_t *
+port_cfg_new(size_t namelen)
+{
+ tor_assert(namelen <= SIZE_T_CEILING - sizeof(port_cfg_t) - 1);
+ port_cfg_t *cfg = tor_malloc_zero(sizeof(port_cfg_t) + namelen + 1);
+ cfg->entry_cfg.ipv4_traffic = 1;
+ cfg->entry_cfg.ipv6_traffic = 1;
+ cfg->entry_cfg.dns_request = 1;
+ cfg->entry_cfg.onion_traffic = 1;
+ cfg->entry_cfg.prefer_ipv6_virtaddr = 1;
+ return cfg;
+}
+
+/** Free all storage held in <b>port</b> */
+STATIC void
+port_cfg_free_(port_cfg_t *port)
+{
+ tor_free(port);
+}
+
+/** Warn for every port in <b>ports</b> of type <b>listener_type</b> that is
+ * on a publicly routable address. */
+static void
+warn_nonlocal_client_ports(const smartlist_t *ports,
+ const char *portname,
+ const int listener_type)
+{
+ SMARTLIST_FOREACH_BEGIN(ports, const port_cfg_t *, port) {
+ if (port->type != listener_type)
+ continue;
+ if (port->is_unix_addr) {
+ /* Unix sockets aren't accessible over a network. */
+ } else if (!tor_addr_is_internal(&port->addr, 1)) {
+ log_warn(LD_CONFIG, "You specified a public address '%s' for %sPort. "
+ "Other people on the Internet might find your computer and "
+ "use it as an open proxy. Please don't allow this unless you "
+ "have a good reason.",
+ fmt_addrport(&port->addr, port->port), portname);
+ } else if (!tor_addr_is_loopback(&port->addr)) {
+ log_notice(LD_CONFIG, "You configured a non-loopback address '%s' "
+ "for %sPort. This allows everybody on your local network to "
+ "use your machine as a proxy. Make sure this is what you "
+ "wanted.",
+ fmt_addrport(&port->addr, port->port), portname);
+ }
+ } SMARTLIST_FOREACH_END(port);
+}
+
+/** Warn for every Extended ORPort port in <b>ports</b> that is on a
+ * publicly routable address. */
+static void
+warn_nonlocal_ext_orports(const smartlist_t *ports, const char *portname)
+{
+ SMARTLIST_FOREACH_BEGIN(ports, const port_cfg_t *, port) {
+ if (port->type != CONN_TYPE_EXT_OR_LISTENER)
+ continue;
+ if (port->is_unix_addr)
+ continue;
+ /* XXX maybe warn even if address is RFC1918? */
+ if (!tor_addr_is_internal(&port->addr, 1)) {
+ log_warn(LD_CONFIG, "You specified a public address '%s' for %sPort. "
+ "This is not advised; this address is supposed to only be "
+ "exposed on localhost so that your pluggable transport "
+ "proxies can connect to it.",
+ fmt_addrport(&port->addr, port->port), portname);
+ }
+ } SMARTLIST_FOREACH_END(port);
+}
+
+/** Given a list of port_cfg_t in <b>ports</b>, warn if any controller port
+ * there is listening on any non-loopback address. If <b>forbid_nonlocal</b>
+ * is true, then emit a stronger warning and remove the port from the list.
+ */
+static void
+warn_nonlocal_controller_ports(smartlist_t *ports, unsigned forbid_nonlocal)
+{
+ int warned = 0;
+ SMARTLIST_FOREACH_BEGIN(ports, port_cfg_t *, port) {
+ if (port->type != CONN_TYPE_CONTROL_LISTENER)
+ continue;
+ if (port->is_unix_addr)
+ continue;
+ if (!tor_addr_is_loopback(&port->addr)) {
+ if (forbid_nonlocal) {
+ if (!warned)
+ log_warn(LD_CONFIG,
+ "You have a ControlPort set to accept "
+ "unauthenticated connections from a non-local address. "
+ "This means that programs not running on your computer "
+ "can reconfigure your Tor, without even having to guess a "
+ "password. That's so bad that I'm closing your ControlPort "
+ "for you. If you need to control your Tor remotely, try "
+ "enabling authentication and using a tool like stunnel or "
+ "ssh to encrypt remote access.");
+ warned = 1;
+ port_cfg_free(port);
+ SMARTLIST_DEL_CURRENT(ports, port);
+ } else {
+ log_warn(LD_CONFIG, "You have a ControlPort set to accept "
+ "connections from a non-local address. This means that "
+ "programs not running on your computer can reconfigure your "
+ "Tor. That's pretty bad, since the controller "
+ "protocol isn't encrypted! Maybe you should just listen on "
+ "127.0.0.1 and use a tool like stunnel or ssh to encrypt "
+ "remote connections to your control port.");
+ return; /* No point in checking the rest */
+ }
+ }
+ } SMARTLIST_FOREACH_END(port);
+}
+
+/**
+ * Take a string (<b>line</b>) that begins with either an address:port, a
+ * port, or an AF_UNIX address, optionally quoted, prefixed with
+ * "unix:". Parse that line, and on success, set <b>addrport_out</b> to a new
+ * string containing the beginning portion (without prefix). Iff there was a
+ * unix: prefix, set <b>is_unix_out</b> to true. On success, also set
+ * <b>rest_out</b> to point to the part of the line after the address portion.
+ *
+ * Return 0 on success, -1 on failure.
+ */
+int
+port_cfg_line_extract_addrport(const char *line,
+ char **addrport_out,
+ int *is_unix_out,
+ const char **rest_out)
+{
+ tor_assert(line);
+ tor_assert(addrport_out);
+ tor_assert(is_unix_out);
+ tor_assert(rest_out);
+
+ line = eat_whitespace(line);
+
+ if (!strcmpstart(line, unix_q_socket_prefix)) {
+ // It starts with unix:"
+ size_t sz;
+ *is_unix_out = 1;
+ *addrport_out = NULL;
+ line += strlen(unix_socket_prefix); /*No q: Keep the quote */
+ *rest_out = unescape_string(line, addrport_out, &sz);
+ if (!*rest_out || (*addrport_out && sz != strlen(*addrport_out))) {
+ tor_free(*addrport_out);
+ return -1;
+ }
+ *rest_out = eat_whitespace(*rest_out);
+ return 0;
+ } else {
+ // Is there a unix: prefix?
+ if (!strcmpstart(line, unix_socket_prefix)) {
+ line += strlen(unix_socket_prefix);
+ *is_unix_out = 1;
+ } else {
+ *is_unix_out = 0;
+ }
+
+ const char *end = find_whitespace(line);
+ if (BUG(!end)) {
+ end = strchr(line, '\0'); // LCOV_EXCL_LINE -- this can't be NULL
+ }
+ tor_assert(end && end >= line);
+ *addrport_out = tor_strndup(line, end - line);
+ *rest_out = eat_whitespace(end);
+ return 0;
+ }
+}
+
+static void
+warn_client_dns_cache(const char *option, int disabling)
+{
+ if (disabling)
+ return;
+
+ warn_deprecated_option(option,
+ "Client-side DNS cacheing enables a wide variety of route-"
+ "capture attacks. If a single bad exit node lies to you about "
+ "an IP address, cacheing that address would make you visit "
+ "an address of the attacker's choice every time you connected "
+ "to your destination.");
+}
+
+/**
+ * Validate the configured bridge distribution method from a BridgeDistribution
+ * config line.
+ *
+ * The input <b>bd</b>, is a string taken from the BridgeDistribution config
+ * line (if present). If the option wasn't set, return 0 immediately. The
+ * BridgeDistribution option is then validated. Currently valid, recognised
+ * options are:
+ *
+ * - "none"
+ * - "any"
+ * - "https"
+ * - "email"
+ * - "moat"
+ * - "hyphae"
+ *
+ * If the option string is unrecognised, a warning will be logged and 0 is
+ * returned. If the option string contains an invalid character, -1 is
+ * returned.
+ **/
+STATIC int
+check_bridge_distribution_setting(const char *bd)
+{
+ if (bd == NULL)
+ return 0;
+
+ const char *RECOGNIZED[] = {
+ "none", "any", "https", "email", "moat", "hyphae"
+ };
+ unsigned i;
+ for (i = 0; i < ARRAY_LENGTH(RECOGNIZED); ++i) {
+ if (!strcmp(bd, RECOGNIZED[i]))
+ return 0;
+ }
+
+ const char *cp = bd;
+ // Method = (KeywordChar | "_") +
+ while (TOR_ISALNUM(*cp) || *cp == '-' || *cp == '_')
+ ++cp;
+
+ if (*cp == 0) {
+ log_warn(LD_CONFIG, "Unrecognized BridgeDistribution value %s. I'll "
+ "assume you know what you are doing...", escaped(bd));
+ return 0; // we reached the end of the string; all is well
+ } else {
+ return -1; // we found a bad character in the string.
+ }
+}
+
+/**
+ * Parse port configuration for a single port type.
+ *
+ * Read entries of the "FooPort" type from the list <b>ports</b>. Syntax is
+ * that FooPort can have any number of entries of the format
+ * "[Address:][Port] IsolationOptions".
+ *
+ * In log messages, describe the port type as <b>portname</b>.
+ *
+ * If no address is specified, default to <b>defaultaddr</b>. If no
+ * FooPort is given, default to defaultport (if 0, there is no default).
+ *
+ * If CL_PORT_NO_STREAM_OPTIONS is set in <b>flags</b>, do not allow stream
+ * isolation options in the FooPort entries.
+ *
+ * If CL_PORT_WARN_NONLOCAL is set in <b>flags</b>, warn if any of the
+ * ports are not on a local address. If CL_PORT_FORBID_NONLOCAL is set,
+ * this is a control port with no password set: don't even allow it.
+ *
+ * If CL_PORT_SERVER_OPTIONS is set in <b>flags</b>, do not allow stream
+ * isolation options in the FooPort entries; instead allow the
+ * server-port option set.
+ *
+ * If CL_PORT_TAKES_HOSTNAMES is set in <b>flags</b>, allow the options
+ * {No,}IPv{4,6}Traffic.
+ *
+ * On success, if <b>out</b> is given, add a new port_cfg_t entry to
+ * <b>out</b> for every port that the client should listen on. Return 0
+ * on success, -1 on failure.
+ */
+STATIC int
+parse_port_config(smartlist_t *out,
+ const config_line_t *ports,
+ const char *portname,
+ int listener_type,
+ const char *defaultaddr,
+ int defaultport,
+ const unsigned flags)
+{
+ smartlist_t *elts;
+ int retval = -1;
+ const unsigned is_control = (listener_type == CONN_TYPE_CONTROL_LISTENER);
+ const unsigned is_ext_orport = (listener_type == CONN_TYPE_EXT_OR_LISTENER);
+ const unsigned allow_no_stream_options = flags & CL_PORT_NO_STREAM_OPTIONS;
+ const unsigned use_server_options = flags & CL_PORT_SERVER_OPTIONS;
+ const unsigned warn_nonlocal = flags & CL_PORT_WARN_NONLOCAL;
+ const unsigned forbid_nonlocal = flags & CL_PORT_FORBID_NONLOCAL;
+ const unsigned default_to_group_writable =
+ flags & CL_PORT_DFLT_GROUP_WRITABLE;
+ const unsigned takes_hostnames = flags & CL_PORT_TAKES_HOSTNAMES;
+ const unsigned is_unix_socket = flags & CL_PORT_IS_UNIXSOCKET;
+ int got_zero_port=0, got_nonzero_port=0;
+ char *unix_socket_path = NULL;
+
+ /* If there's no FooPort, then maybe make a default one. */
+ if (! ports) {
+ if (defaultport && defaultaddr && out) {
+ port_cfg_t *cfg = port_cfg_new(is_unix_socket ? strlen(defaultaddr) : 0);
+ cfg->type = listener_type;
+ if (is_unix_socket) {
+ tor_addr_make_unspec(&cfg->addr);
+ memcpy(cfg->unix_addr, defaultaddr, strlen(defaultaddr) + 1);
+ cfg->is_unix_addr = 1;
+ } else {
+ cfg->port = defaultport;
+ tor_addr_parse(&cfg->addr, defaultaddr);
+ }
+ cfg->entry_cfg.session_group = SESSION_GROUP_UNSET;
+ cfg->entry_cfg.isolation_flags = ISO_DEFAULT;
+ smartlist_add(out, cfg);
+ }
+ return 0;
+ }
+
+ /* At last we can actually parse the FooPort lines. The syntax is:
+ * [Addr:](Port|auto) [Options].*/
+ elts = smartlist_new();
+ char *addrport = NULL;
+
+ for (; ports; ports = ports->next) {
+ tor_addr_t addr;
+ tor_addr_make_unspec(&addr);
+
+ int port;
+ int sessiongroup = SESSION_GROUP_UNSET;
+ unsigned isolation = ISO_DEFAULT;
+ int prefer_no_auth = 0;
+ int socks_iso_keep_alive = 0;
+
+ uint16_t ptmp=0;
+ int ok;
+ /* This must be kept in sync with port_cfg_new's defaults */
+ int no_listen = 0, no_advertise = 0, all_addrs = 0,
+ bind_ipv4_only = 0, bind_ipv6_only = 0,
+ ipv4_traffic = 1, ipv6_traffic = 1, prefer_ipv6 = 0, dns_request = 1,
+ onion_traffic = 1,
+ cache_ipv4 = 0, use_cached_ipv4 = 0,
+ cache_ipv6 = 0, use_cached_ipv6 = 0,
+ prefer_ipv6_automap = 1, world_writable = 0, group_writable = 0,
+ relax_dirmode_check = 0,
+ has_used_unix_socket_only_option = 0;
+
+ int is_unix_tagged_addr = 0;
+ const char *rest_of_line = NULL;
+ if (port_cfg_line_extract_addrport(ports->value,
+ &addrport, &is_unix_tagged_addr, &rest_of_line)<0) {
+ log_warn(LD_CONFIG, "Invalid %sPort line with unparsable address",
+ portname);
+ goto err;
+ }
+ if (strlen(addrport) == 0) {
+ log_warn(LD_CONFIG, "Invalid %sPort line with no address", portname);
+ goto err;
+ }
+
+ /* Split the remainder... */
+ smartlist_split_string(elts, rest_of_line, NULL,
+ SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
+
+ /* Let's start to check if it's a Unix socket path. */
+ if (is_unix_tagged_addr) {
+#ifndef HAVE_SYS_UN_H
+ log_warn(LD_CONFIG, "Unix sockets not supported on this system.");
+ goto err;
+#endif
+ unix_socket_path = addrport;
+ addrport = NULL;
+ }
+
+ if (unix_socket_path &&
+ ! conn_listener_type_supports_af_unix(listener_type)) {
+ log_warn(LD_CONFIG, "%sPort does not support unix sockets", portname);
+ goto err;
+ }
+
+ if (unix_socket_path) {
+ port = 1;
+ } else if (is_unix_socket) {
+ if (BUG(!addrport))
+ goto err; // LCOV_EXCL_LINE unreachable, but coverity can't tell that
+ unix_socket_path = tor_strdup(addrport);
+ if (!strcmp(addrport, "0"))
+ port = 0;
+ else
+ port = 1;
+ } else if (!strcasecmp(addrport, "auto")) {
+ port = CFG_AUTO_PORT;
+ int af = tor_addr_parse(&addr, defaultaddr);
+ tor_assert(af >= 0);
+ } else if (!strcasecmpend(addrport, ":auto")) {
+ char *addrtmp = tor_strndup(addrport, strlen(addrport)-5);
+ port = CFG_AUTO_PORT;
+ if (tor_addr_port_lookup(addrtmp, &addr, &ptmp)<0 || ptmp) {
+ log_warn(LD_CONFIG, "Invalid address '%s' for %sPort",
+ escaped(addrport), portname);
+ tor_free(addrtmp);
+ goto err;
+ }
+ tor_free(addrtmp);
+ } else {
+ /* Try parsing integer port before address, because, who knows?
+ "9050" might be a valid address. */
+ port = (int) tor_parse_long(addrport, 10, 0, 65535, &ok, NULL);
+ if (ok) {
+ int af = tor_addr_parse(&addr, defaultaddr);
+ tor_assert(af >= 0);
+ } else if (tor_addr_port_lookup(addrport, &addr, &ptmp) == 0) {
+ if (ptmp == 0) {
+ log_warn(LD_CONFIG, "%sPort line has address but no port", portname);
+ goto err;
+ }
+ port = ptmp;
+ } else {
+ log_warn(LD_CONFIG, "Couldn't parse address %s for %sPort",
+ escaped(addrport), portname);
+ goto err;
+ }
+ }
+
+ if (unix_socket_path && default_to_group_writable)
+ group_writable = 1;
+
+ /* Now parse the rest of the options, if any. */
+ if (use_server_options) {
+ /* This is a server port; parse advertising options */
+ SMARTLIST_FOREACH_BEGIN(elts, char *, elt) {
+ if (!strcasecmp(elt, "NoAdvertise")) {
+ no_advertise = 1;
+ } else if (!strcasecmp(elt, "NoListen")) {
+ no_listen = 1;
+#if 0
+ /* not implemented yet. */
+ } else if (!strcasecmp(elt, "AllAddrs")) {
+
+ all_addrs = 1;
+#endif /* 0 */
+ } else if (!strcasecmp(elt, "IPv4Only")) {
+ bind_ipv4_only = 1;
+ } else if (!strcasecmp(elt, "IPv6Only")) {
+ bind_ipv6_only = 1;
+ } else {
+ log_warn(LD_CONFIG, "Unrecognized %sPort option '%s'",
+ portname, escaped(elt));
+ }
+ } SMARTLIST_FOREACH_END(elt);
+
+ if (no_advertise && no_listen) {
+ log_warn(LD_CONFIG, "Tried to set both NoListen and NoAdvertise "
+ "on %sPort line '%s'",
+ portname, escaped(ports->value));
+ goto err;
+ }
+ if (bind_ipv4_only && bind_ipv6_only) {
+ log_warn(LD_CONFIG, "Tried to set both IPv4Only and IPv6Only "
+ "on %sPort line '%s'",
+ portname, escaped(ports->value));
+ goto err;
+ }
- if (bind_ipv4_only && tor_addr_family(&addr) == AF_INET6) {
- log_warn(LD_CONFIG, "Could not interpret %sPort address as IPv6",
++ if (bind_ipv4_only && tor_addr_family(&addr) != AF_INET) {
++ log_warn(LD_CONFIG, "Could not interpret %sPort address as IPv4",
+ portname);
+ goto err;
+ }
- if (bind_ipv6_only && tor_addr_family(&addr) == AF_INET) {
- log_warn(LD_CONFIG, "Could not interpret %sPort address as IPv4",
++ if (bind_ipv6_only && tor_addr_family(&addr) != AF_INET6) {
++ log_warn(LD_CONFIG, "Could not interpret %sPort address as IPv6",
+ portname);
+ goto err;
+ }
+ } else {
+ /* This is a client port; parse isolation options */
+ SMARTLIST_FOREACH_BEGIN(elts, char *, elt) {
+ int no = 0, isoflag = 0;
+ const char *elt_orig = elt;
+
+ if (!strcasecmpstart(elt, "SessionGroup=")) {
+ int group = (int)tor_parse_long(elt+strlen("SessionGroup="),
+ 10, 0, INT_MAX, &ok, NULL);
+ if (!ok || !allow_no_stream_options) {
+ log_warn(LD_CONFIG, "Invalid %sPort option '%s'",
+ portname, escaped(elt));
+ goto err;
+ }
+ if (sessiongroup >= 0) {
+ log_warn(LD_CONFIG, "Multiple SessionGroup options on %sPort",
+ portname);
+ goto err;
+ }
+ sessiongroup = group;
+ continue;
+ }
+
+ if (!strcasecmpstart(elt, "No")) {
+ no = 1;
+ elt += 2;
+ }
+
+ if (!strcasecmp(elt, "GroupWritable")) {
+ group_writable = !no;
+ has_used_unix_socket_only_option = 1;
+ continue;
+ } else if (!strcasecmp(elt, "WorldWritable")) {
+ world_writable = !no;
+ has_used_unix_socket_only_option = 1;
+ continue;
+ } else if (!strcasecmp(elt, "RelaxDirModeCheck")) {
+ relax_dirmode_check = !no;
+ has_used_unix_socket_only_option = 1;
+ continue;
+ }
+
+ if (allow_no_stream_options) {
+ log_warn(LD_CONFIG, "Unrecognized %sPort option '%s'",
+ portname, escaped(elt));
+ continue;
+ }
+
+ if (takes_hostnames) {
+ if (!strcasecmp(elt, "IPv4Traffic")) {
+ ipv4_traffic = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "IPv6Traffic")) {
+ ipv6_traffic = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "PreferIPv6")) {
+ prefer_ipv6 = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "DNSRequest")) {
+ dns_request = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "OnionTraffic")) {
+ onion_traffic = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "OnionTrafficOnly")) {
+ /* Only connect to .onion addresses. Equivalent to
+ * NoDNSRequest, NoIPv4Traffic, NoIPv6Traffic. The option
+ * NoOnionTrafficOnly is not supported, it's too confusing. */
+ if (no) {
+ log_warn(LD_CONFIG, "Unsupported %sPort option 'No%s'. Use "
+ "DNSRequest, IPv4Traffic, and/or IPv6Traffic instead.",
+ portname, escaped(elt));
+ } else {
+ ipv4_traffic = ipv6_traffic = dns_request = 0;
+ }
+ continue;
+ }
+ }
+ if (!strcasecmp(elt, "CacheIPv4DNS")) {
+ warn_client_dns_cache(elt, no); // since 0.2.9.2-alpha
+ cache_ipv4 = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "CacheIPv6DNS")) {
+ warn_client_dns_cache(elt, no); // since 0.2.9.2-alpha
+ cache_ipv6 = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "CacheDNS")) {
+ warn_client_dns_cache(elt, no); // since 0.2.9.2-alpha
+ cache_ipv4 = cache_ipv6 = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "UseIPv4Cache")) {
+ warn_client_dns_cache(elt, no); // since 0.2.9.2-alpha
+ use_cached_ipv4 = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "UseIPv6Cache")) {
+ warn_client_dns_cache(elt, no); // since 0.2.9.2-alpha
+ use_cached_ipv6 = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "UseDNSCache")) {
+ warn_client_dns_cache(elt, no); // since 0.2.9.2-alpha
+ use_cached_ipv4 = use_cached_ipv6 = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "PreferIPv6Automap")) {
+ prefer_ipv6_automap = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "PreferSOCKSNoAuth")) {
+ prefer_no_auth = ! no;
+ continue;
+ } else if (!strcasecmp(elt, "KeepAliveIsolateSOCKSAuth")) {
+ socks_iso_keep_alive = ! no;
+ continue;
+ }
+
+ if (!strcasecmpend(elt, "s"))
+ elt[strlen(elt)-1] = '\0'; /* kill plurals. */
+
+ if (!strcasecmp(elt, "IsolateDestPort")) {
+ isoflag = ISO_DESTPORT;
+ } else if (!strcasecmp(elt, "IsolateDestAddr")) {
+ isoflag = ISO_DESTADDR;
+ } else if (!strcasecmp(elt, "IsolateSOCKSAuth")) {
+ isoflag = ISO_SOCKSAUTH;
+ } else if (!strcasecmp(elt, "IsolateClientProtocol")) {
+ isoflag = ISO_CLIENTPROTO;
+ } else if (!strcasecmp(elt, "IsolateClientAddr")) {
+ isoflag = ISO_CLIENTADDR;
+ } else {
+ log_warn(LD_CONFIG, "Unrecognized %sPort option '%s'",
+ portname, escaped(elt_orig));
+ }
+
+ if (no) {
+ isolation &= ~isoflag;
+ } else {
+ isolation |= isoflag;
+ }
+ } SMARTLIST_FOREACH_END(elt);
+ }
+
+ if (port)
+ got_nonzero_port = 1;
+ else
+ got_zero_port = 1;
+
+ if (dns_request == 0 && listener_type == CONN_TYPE_AP_DNS_LISTENER) {
+ log_warn(LD_CONFIG, "You have a %sPort entry with DNS disabled; that "
+ "won't work.", portname);
+ goto err;
+ }
+
+ if (ipv4_traffic == 0 && ipv6_traffic == 0 && onion_traffic == 0
+ && listener_type != CONN_TYPE_AP_DNS_LISTENER) {
+ log_warn(LD_CONFIG, "You have a %sPort entry with all of IPv4 and "
+ "IPv6 and .onion disabled; that won't work.", portname);
+ goto err;
+ }
+
+ if (dns_request == 1 && ipv4_traffic == 0 && ipv6_traffic == 0
+ && listener_type != CONN_TYPE_AP_DNS_LISTENER) {
+ log_warn(LD_CONFIG, "You have a %sPort entry with DNSRequest enabled, "
+ "but IPv4 and IPv6 disabled; DNS-based sites won't work.",
+ portname);
+ goto err;
+ }
+
+ if ( has_used_unix_socket_only_option && ! unix_socket_path) {
+ log_warn(LD_CONFIG, "You have a %sPort entry with GroupWritable, "
+ "WorldWritable, or RelaxDirModeCheck, but it is not a "
+ "unix socket.", portname);
+ goto err;
+ }
+
+ if (!(isolation & ISO_SOCKSAUTH) && socks_iso_keep_alive) {
+ log_warn(LD_CONFIG, "You have a %sPort entry with both "
+ "NoIsolateSOCKSAuth and KeepAliveIsolateSOCKSAuth set.",
+ portname);
+ goto err;
+ }
+
+ if (unix_socket_path && (isolation & ISO_CLIENTADDR)) {
+ /* `IsolateClientAddr` is nonsensical in the context of AF_LOCAL.
+ * just silently remove the isolation flag.
+ */
+ isolation &= ~ISO_CLIENTADDR;
+ }
+
+ if (out && port) {
+ size_t namelen = unix_socket_path ? strlen(unix_socket_path) : 0;
+ port_cfg_t *cfg = port_cfg_new(namelen);
+ if (unix_socket_path) {
+ tor_addr_make_unspec(&cfg->addr);
+ memcpy(cfg->unix_addr, unix_socket_path, namelen + 1);
+ cfg->is_unix_addr = 1;
+ tor_free(unix_socket_path);
+ } else {
+ tor_addr_copy(&cfg->addr, &addr);
+ cfg->port = port;
+ }
+ cfg->type = listener_type;
+ cfg->is_world_writable = world_writable;
+ cfg->is_group_writable = group_writable;
+ cfg->relax_dirmode_check = relax_dirmode_check;
+ cfg->entry_cfg.isolation_flags = isolation;
+ cfg->entry_cfg.session_group = sessiongroup;
+ cfg->server_cfg.no_advertise = no_advertise;
+ cfg->server_cfg.no_listen = no_listen;
+ cfg->server_cfg.all_addrs = all_addrs;
+ cfg->server_cfg.bind_ipv4_only = bind_ipv4_only;
+ cfg->server_cfg.bind_ipv6_only = bind_ipv6_only;
+ cfg->entry_cfg.ipv4_traffic = ipv4_traffic;
+ cfg->entry_cfg.ipv6_traffic = ipv6_traffic;
+ cfg->entry_cfg.prefer_ipv6 = prefer_ipv6;
+ cfg->entry_cfg.dns_request = dns_request;
+ cfg->entry_cfg.onion_traffic = onion_traffic;
+ cfg->entry_cfg.cache_ipv4_answers = cache_ipv4;
+ cfg->entry_cfg.cache_ipv6_answers = cache_ipv6;
+ cfg->entry_cfg.use_cached_ipv4_answers = use_cached_ipv4;
+ cfg->entry_cfg.use_cached_ipv6_answers = use_cached_ipv6;
+ cfg->entry_cfg.prefer_ipv6_virtaddr = prefer_ipv6_automap;
+ cfg->entry_cfg.socks_prefer_no_auth = prefer_no_auth;
+ if (! (isolation & ISO_SOCKSAUTH))
+ cfg->entry_cfg.socks_prefer_no_auth = 1;
+ cfg->entry_cfg.socks_iso_keep_alive = socks_iso_keep_alive;
+
+ smartlist_add(out, cfg);
+ }
+ SMARTLIST_FOREACH(elts, char *, cp, tor_free(cp));
+ smartlist_clear(elts);
+ tor_free(addrport);
+ tor_free(unix_socket_path);
+ }
+
+ if (warn_nonlocal && out) {
+ if (is_control)
+ warn_nonlocal_controller_ports(out, forbid_nonlocal);
+ else if (is_ext_orport)
+ warn_nonlocal_ext_orports(out, portname);
+ else
+ warn_nonlocal_client_ports(out, portname, listener_type);
+ }
+
+ if (got_zero_port && got_nonzero_port) {
+ log_warn(LD_CONFIG, "You specified a nonzero %sPort along with '%sPort 0' "
+ "in the same configuration. Did you mean to disable %sPort or "
+ "not?", portname, portname, portname);
+ goto err;
+ }
+
+ retval = 0;
+ err:
+ SMARTLIST_FOREACH(elts, char *, cp, tor_free(cp));
+ smartlist_free(elts);
+ tor_free(unix_socket_path);
+ tor_free(addrport);
+ return retval;
+}
+
+/** Return the number of ports which are actually going to listen with type
+ * <b>listenertype</b>. Do not count no_listen ports. Only count unix
+ * sockets if count_sockets is true. */
+static int
+count_real_listeners(const smartlist_t *ports, int listenertype,
+ int count_sockets)
+{
+ int n = 0;
+ SMARTLIST_FOREACH_BEGIN(ports, port_cfg_t *, port) {
+ if (port->server_cfg.no_listen)
+ continue;
+ if (!count_sockets && port->is_unix_addr)
+ continue;
+ if (port->type != listenertype)
+ continue;
+ ++n;
+ } SMARTLIST_FOREACH_END(port);
+ return n;
+}
+
+/** Parse all ports from <b>options</b>. On success, set *<b>n_ports_out</b>
+ * to the number of ports that are listed, update the *Port_set values in
+ * <b>options</b>, and return 0. On failure, set *<b>msg</b> to a
+ * description of the problem and return -1.
+ *
+ * If <b>validate_only</b> is false, set configured_client_ports to the
+ * new list of ports parsed from <b>options</b>.
+ **/
+static int
+parse_ports(or_options_t *options, int validate_only,
+ char **msg, int *n_ports_out,
+ int *world_writable_control_socket)
+{
+ smartlist_t *ports;
+ int retval = -1;
+
+ ports = smartlist_new();
+
+ *n_ports_out = 0;
+
+ const unsigned gw_flag = options->UnixSocksGroupWritable ?
+ CL_PORT_DFLT_GROUP_WRITABLE : 0;
+ if (parse_port_config(ports,
+ options->SocksPort_lines,
+ "Socks", CONN_TYPE_AP_LISTENER,
+ "127.0.0.1", 9050,
+ ((validate_only ? 0 : CL_PORT_WARN_NONLOCAL)
+ | CL_PORT_TAKES_HOSTNAMES | gw_flag)) < 0) {
+ *msg = tor_strdup("Invalid SocksPort configuration");
+ goto err;
+ }
+ if (parse_port_config(ports,
+ options->DNSPort_lines,
+ "DNS", CONN_TYPE_AP_DNS_LISTENER,
+ "127.0.0.1", 0,
+ CL_PORT_WARN_NONLOCAL|CL_PORT_TAKES_HOSTNAMES) < 0) {
+ *msg = tor_strdup("Invalid DNSPort configuration");
+ goto err;
+ }
+ if (parse_port_config(ports,
+ options->TransPort_lines,
+ "Trans", CONN_TYPE_AP_TRANS_LISTENER,
+ "127.0.0.1", 0,
+ CL_PORT_WARN_NONLOCAL) < 0) {
+ *msg = tor_strdup("Invalid TransPort configuration");
+ goto err;
+ }
+ if (parse_port_config(ports,
+ options->NATDPort_lines,
+ "NATD", CONN_TYPE_AP_NATD_LISTENER,
+ "127.0.0.1", 0,
+ CL_PORT_WARN_NONLOCAL) < 0) {
+ *msg = tor_strdup("Invalid NatdPort configuration");
+ goto err;
+ }
+ if (parse_port_config(ports,
+ options->HTTPTunnelPort_lines,
+ "HTTP Tunnel", CONN_TYPE_AP_HTTP_CONNECT_LISTENER,
+ "127.0.0.1", 0,
+ ((validate_only ? 0 : CL_PORT_WARN_NONLOCAL)
+ | CL_PORT_TAKES_HOSTNAMES | gw_flag)) < 0) {
+ *msg = tor_strdup("Invalid HTTPTunnelPort configuration");
+ goto err;
+ }
+ {
+ unsigned control_port_flags = CL_PORT_NO_STREAM_OPTIONS |
+ CL_PORT_WARN_NONLOCAL;
+ const int any_passwords = (options->HashedControlPassword ||
+ options->HashedControlSessionPassword ||
+ options->CookieAuthentication);
+ if (! any_passwords)
+ control_port_flags |= CL_PORT_FORBID_NONLOCAL;
+ if (options->ControlSocketsGroupWritable)
+ control_port_flags |= CL_PORT_DFLT_GROUP_WRITABLE;
+
+ if (parse_port_config(ports,
+ options->ControlPort_lines,
+ "Control", CONN_TYPE_CONTROL_LISTENER,
+ "127.0.0.1", 0,
+ control_port_flags) < 0) {
+ *msg = tor_strdup("Invalid ControlPort configuration");
+ goto err;
+ }
+
+ if (parse_port_config(ports, options->ControlSocket,
+ "ControlSocket",
+ CONN_TYPE_CONTROL_LISTENER, NULL, 0,
+ control_port_flags | CL_PORT_IS_UNIXSOCKET) < 0) {
+ *msg = tor_strdup("Invalid ControlSocket configuration");
+ goto err;
+ }
+ }
+ if (! options->ClientOnly) {
+ if (parse_port_config(ports,
+ options->ORPort_lines,
+ "OR", CONN_TYPE_OR_LISTENER,
+ "0.0.0.0", 0,
+ CL_PORT_SERVER_OPTIONS) < 0) {
+ *msg = tor_strdup("Invalid ORPort configuration");
+ goto err;
+ }
+ if (parse_port_config(ports,
+ options->ExtORPort_lines,
+ "ExtOR", CONN_TYPE_EXT_OR_LISTENER,
+ "127.0.0.1", 0,
+ CL_PORT_SERVER_OPTIONS|CL_PORT_WARN_NONLOCAL) < 0) {
+ *msg = tor_strdup("Invalid ExtORPort configuration");
+ goto err;
+ }
+ if (parse_port_config(ports,
+ options->DirPort_lines,
+ "Dir", CONN_TYPE_DIR_LISTENER,
+ "0.0.0.0", 0,
+ CL_PORT_SERVER_OPTIONS) < 0) {
+ *msg = tor_strdup("Invalid DirPort configuration");
+ goto err;
+ }
+ }
+
+ int n_low_ports = 0;
+ if (check_server_ports(ports, options, &n_low_ports) < 0) {
+ *msg = tor_strdup("Misconfigured server ports");
+ goto err;
+ }
+ if (have_low_ports < 0)
+ have_low_ports = (n_low_ports > 0);
+
+ *n_ports_out = smartlist_len(ports);
+
+ retval = 0;
+
+ /* Update the *Port_set options. The !! here is to force a boolean out of
+ an integer. */
+ options->ORPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_OR_LISTENER, 0);
+ options->SocksPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_AP_LISTENER, 1);
+ options->TransPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_AP_TRANS_LISTENER, 1);
+ options->NATDPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_AP_NATD_LISTENER, 1);
+ options->HTTPTunnelPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_AP_HTTP_CONNECT_LISTENER, 1);
+ /* Use options->ControlSocket to test if a control socket is set */
+ options->ControlPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_CONTROL_LISTENER, 0);
+ options->DirPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_DIR_LISTENER, 0);
+ options->DNSPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_AP_DNS_LISTENER, 1);
+ options->ExtORPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_EXT_OR_LISTENER, 0);
+
+ if (world_writable_control_socket) {
+ SMARTLIST_FOREACH(ports, port_cfg_t *, p,
+ if (p->type == CONN_TYPE_CONTROL_LISTENER &&
+ p->is_unix_addr &&
+ p->is_world_writable) {
+ *world_writable_control_socket = 1;
+ break;
+ });
+ }
+
+ if (!validate_only) {
+ if (configured_ports) {
+ SMARTLIST_FOREACH(configured_ports,
+ port_cfg_t *, p, port_cfg_free(p));
+ smartlist_free(configured_ports);
+ }
+ configured_ports = ports;
+ ports = NULL; /* prevent free below. */
+ }
+
+ err:
+ if (ports) {
+ SMARTLIST_FOREACH(ports, port_cfg_t *, p, port_cfg_free(p));
+ smartlist_free(ports);
+ }
+ return retval;
+}
+
+/* Does port bind to IPv4? */
+static int
+port_binds_ipv4(const port_cfg_t *port)
+{
+ return tor_addr_family(&port->addr) == AF_INET ||
+ (tor_addr_family(&port->addr) == AF_UNSPEC
+ && !port->server_cfg.bind_ipv6_only);
+}
+
+/* Does port bind to IPv6? */
+static int
+port_binds_ipv6(const port_cfg_t *port)
+{
+ return tor_addr_family(&port->addr) == AF_INET6 ||
+ (tor_addr_family(&port->addr) == AF_UNSPEC
+ && !port->server_cfg.bind_ipv4_only);
+}
+
+/** Given a list of <b>port_cfg_t</b> in <b>ports</b>, check them for internal
+ * consistency and warn as appropriate. Set *<b>n_low_ports_out</b> to the
+ * number of sub-1024 ports we will be binding. */
+static int
+check_server_ports(const smartlist_t *ports,
+ const or_options_t *options,
+ int *n_low_ports_out)
+{
+ int n_orport_advertised = 0;
+ int n_orport_advertised_ipv4 = 0;
+ int n_orport_listeners = 0;
+ int n_dirport_advertised = 0;
+ int n_dirport_listeners = 0;
+ int n_low_port = 0;
+ int r = 0;
+
+ SMARTLIST_FOREACH_BEGIN(ports, const port_cfg_t *, port) {
+ if (port->type == CONN_TYPE_DIR_LISTENER) {
+ if (! port->server_cfg.no_advertise)
+ ++n_dirport_advertised;
+ if (! port->server_cfg.no_listen)
+ ++n_dirport_listeners;
+ } else if (port->type == CONN_TYPE_OR_LISTENER) {
+ if (! port->server_cfg.no_advertise) {
+ ++n_orport_advertised;
+ if (port_binds_ipv4(port))
+ ++n_orport_advertised_ipv4;
+ }
+ if (! port->server_cfg.no_listen)
+ ++n_orport_listeners;
+ } else {
+ continue;
+ }
+#ifndef _WIN32
+ if (!port->server_cfg.no_listen && port->port < 1024)
+ ++n_low_port;
+#endif
+ } SMARTLIST_FOREACH_END(port);
+
+ if (n_orport_advertised && !n_orport_listeners) {
+ log_warn(LD_CONFIG, "We are advertising an ORPort, but not actually "
+ "listening on one.");
+ r = -1;
+ }
+ if (n_orport_listeners && !n_orport_advertised) {
+ log_warn(LD_CONFIG, "We are listening on an ORPort, but not advertising "
+ "any ORPorts. This will keep us from building a %s "
+ "descriptor, and make us impossible to use.",
+ options->BridgeRelay ? "bridge" : "router");
+ r = -1;
+ }
+ if (n_dirport_advertised && !n_dirport_listeners) {
+ log_warn(LD_CONFIG, "We are advertising a DirPort, but not actually "
+ "listening on one.");
+ r = -1;
+ }
+ if (n_dirport_advertised > 1) {
+ log_warn(LD_CONFIG, "Can't advertise more than one DirPort.");
+ r = -1;
+ }
+ if (n_orport_advertised && !n_orport_advertised_ipv4 &&
+ !options->BridgeRelay) {
+ log_warn(LD_CONFIG, "Configured public relay to listen only on an IPv6 "
+ "address. Tor needs to listen on an IPv4 address too.");
+ r = -1;
+ }
+
+ if (n_low_port && options->AccountingMax &&
+ (!have_capability_support() || options->KeepBindCapabilities == 0)) {
+ const char *extra = "";
+ if (options->KeepBindCapabilities == 0 && have_capability_support())
+ extra = ", and you have disabled KeepBindCapabilities.";
+ log_warn(LD_CONFIG,
+ "You have set AccountingMax to use hibernation. You have also "
+ "chosen a low DirPort or OrPort%s."
+ "This combination can make Tor stop "
+ "working when it tries to re-attach the port after a period of "
+ "hibernation. Please choose a different port or turn off "
+ "hibernation unless you know this combination will work on your "
+ "platform.", extra);
+ }
+
+ if (n_low_ports_out)
+ *n_low_ports_out = n_low_port;
+
+ return r;
+}
+
+/** Return a list of port_cfg_t for client ports parsed from the
+ * options. */
+MOCK_IMPL(const smartlist_t *,
+get_configured_ports,(void))
+{
+ if (!configured_ports)
+ configured_ports = smartlist_new();
+ return configured_ports;
+}
+
+/** Return an address:port string representation of the address
+ * where the first <b>listener_type</b> listener waits for
+ * connections. Return NULL if we couldn't find a listener. The
+ * string is allocated on the heap and it's the responsibility of the
+ * caller to free it after use.
+ *
+ * This function is meant to be used by the pluggable transport proxy
+ * spawning code, please make sure that it fits your purposes before
+ * using it. */
+char *
+get_first_listener_addrport_string(int listener_type)
+{
+ static const char *ipv4_localhost = "127.0.0.1";
+ static const char *ipv6_localhost = "[::1]";
+ const char *address;
+ uint16_t port;
+ char *string = NULL;
+
+ if (!configured_ports)
+ return NULL;
+
+ SMARTLIST_FOREACH_BEGIN(configured_ports, const port_cfg_t *, cfg) {
+ if (cfg->server_cfg.no_listen)
+ continue;
+
+ if (cfg->type == listener_type &&
+ tor_addr_family(&cfg->addr) != AF_UNSPEC) {
+
+ /* We found the first listener of the type we are interested in! */
+
+ /* If a listener is listening on INADDR_ANY, assume that it's
+ also listening on 127.0.0.1, and point the transport proxy
+ there: */
+ if (tor_addr_is_null(&cfg->addr))
+ address = tor_addr_is_v4(&cfg->addr) ? ipv4_localhost : ipv6_localhost;
+ else
+ address = fmt_and_decorate_addr(&cfg->addr);
+
+ /* If a listener is configured with port 'auto', we are forced
+ to iterate all listener connections and find out in which
+ port it ended up listening: */
+ if (cfg->port == CFG_AUTO_PORT) {
+ port = router_get_active_listener_port_by_type_af(listener_type,
+ tor_addr_family(&cfg->addr));
+ if (!port)
+ return NULL;
+ } else {
+ port = cfg->port;
+ }
+
+ tor_asprintf(&string, "%s:%u", address, port);
+
+ return string;
+ }
+
+ } SMARTLIST_FOREACH_END(cfg);
+
+ return NULL;
+}
+
+/** Return the first advertised port of type <b>listener_type</b> in
+ * <b>address_family</b>. Returns 0 when no port is found, and when passed
+ * AF_UNSPEC. */
+int
+get_first_advertised_port_by_type_af(int listener_type, int address_family)
+{
+ if (address_family == AF_UNSPEC)
+ return 0;
+
+ const smartlist_t *conf_ports = get_configured_ports();
+ SMARTLIST_FOREACH_BEGIN(conf_ports, const port_cfg_t *, cfg) {
+ if (cfg->type == listener_type &&
+ !cfg->server_cfg.no_advertise) {
+ if ((address_family == AF_INET && port_binds_ipv4(cfg)) ||
+ (address_family == AF_INET6 && port_binds_ipv6(cfg))) {
+ return cfg->port;
+ }
+ }
+ } SMARTLIST_FOREACH_END(cfg);
+ return 0;
+}
+
+/** Return the first advertised address of type <b>listener_type</b> in
+ * <b>address_family</b>. Returns NULL if there is no advertised address,
+ * and when passed AF_UNSPEC. */
+const tor_addr_t *
+get_first_advertised_addr_by_type_af(int listener_type, int address_family)
+{
+ if (address_family == AF_UNSPEC)
+ return NULL;
+ if (!configured_ports)
+ return NULL;
+ SMARTLIST_FOREACH_BEGIN(configured_ports, const port_cfg_t *, cfg) {
+ if (cfg->type == listener_type &&
+ !cfg->server_cfg.no_advertise) {
+ if ((address_family == AF_INET && port_binds_ipv4(cfg)) ||
+ (address_family == AF_INET6 && port_binds_ipv6(cfg))) {
+ return &cfg->addr;
+ }
+ }
+ } SMARTLIST_FOREACH_END(cfg);
+ return NULL;
+}
+
+/** Return 1 if a port exists of type <b>listener_type</b> on <b>addr</b> and
+ * <b>port</b>. If <b>check_wildcard</b> is true, INADDR[6]_ANY and AF_UNSPEC
+ * addresses match any address of the appropriate family; and port -1 matches
+ * any port.
+ * To match auto ports, pass CFG_PORT_AUTO. (Does not match on the actual
+ * automatically chosen listener ports.) */
+int
+port_exists_by_type_addr_port(int listener_type, const tor_addr_t *addr,
+ int port, int check_wildcard)
+{
+ if (!configured_ports || !addr)
+ return 0;
+ SMARTLIST_FOREACH_BEGIN(configured_ports, const port_cfg_t *, cfg) {
+ if (cfg->type == listener_type) {
+ if (cfg->port == port || (check_wildcard && port == -1)) {
+ /* Exact match */
+ if (tor_addr_eq(&cfg->addr, addr)) {
+ return 1;
+ }
+ /* Skip wildcard matches if we're not doing them */
+ if (!check_wildcard) {
+ continue;
+ }
+ /* Wildcard matches IPv4 */
+ const int cfg_v4 = port_binds_ipv4(cfg);
+ const int cfg_any_v4 = tor_addr_is_null(&cfg->addr) && cfg_v4;
+ const int addr_v4 = tor_addr_family(addr) == AF_INET ||
+ tor_addr_family(addr) == AF_UNSPEC;
+ const int addr_any_v4 = tor_addr_is_null(&cfg->addr) && addr_v4;
+ if ((cfg_any_v4 && addr_v4) || (cfg_v4 && addr_any_v4)) {
+ return 1;
+ }
+ /* Wildcard matches IPv6 */
+ const int cfg_v6 = port_binds_ipv6(cfg);
+ const int cfg_any_v6 = tor_addr_is_null(&cfg->addr) && cfg_v6;
+ const int addr_v6 = tor_addr_family(addr) == AF_INET6 ||
+ tor_addr_family(addr) == AF_UNSPEC;
+ const int addr_any_v6 = tor_addr_is_null(&cfg->addr) && addr_v6;
+ if ((cfg_any_v6 && addr_v6) || (cfg_v6 && addr_any_v6)) {
+ return 1;
+ }
+ }
+ }
+ } SMARTLIST_FOREACH_END(cfg);
+ return 0;
+}
+
+/* Like port_exists_by_type_addr_port, but accepts a host-order IPv4 address
+ * instead. */
+int
+port_exists_by_type_addr32h_port(int listener_type, uint32_t addr_ipv4h,
+ int port, int check_wildcard)
+{
+ tor_addr_t ipv4;
+ tor_addr_from_ipv4h(&ipv4, addr_ipv4h);
+ return port_exists_by_type_addr_port(listener_type, &ipv4, port,
+ check_wildcard);
+}
+
+/** Allocate and return a good value for the DataDirectory based on
+ * <b>val</b>, which may be NULL. Return NULL on failure. */
+static char *
+get_data_directory(const char *val)
+{
+#ifdef _WIN32
+ if (val) {
+ return tor_strdup(val);
+ } else {
+ return tor_strdup(get_windows_conf_root());
+ }
+#else /* !(defined(_WIN32)) */
+ const char *d = val;
+ if (!d)
+ d = "~/.tor";
+
+ if (!strcmpstart(d, "~/")) {
+ char *fn = expand_filename(d);
+ if (!fn) {
+ log_warn(LD_CONFIG,"Failed to expand filename \"%s\".", d);
+ return NULL;
+ }
+ if (!val && !strcmp(fn,"/.tor")) {
+ /* If our homedir is /, we probably don't want to use it. */
+ /* Default to LOCALSTATEDIR/tor which is probably closer to what we
+ * want. */
+ log_warn(LD_CONFIG,
+ "Default DataDirectory is \"~/.tor\". This expands to "
+ "\"%s\", which is probably not what you want. Using "
+ "\"%s"PATH_SEPARATOR"tor\" instead", fn, LOCALSTATEDIR);
+ tor_free(fn);
+ fn = tor_strdup(LOCALSTATEDIR PATH_SEPARATOR "tor");
+ }
+ return fn;
+ }
+ return tor_strdup(d);
+#endif /* defined(_WIN32) */
+}
+
+/** Check and normalize the values of options->{Key,Data,Cache}Directory;
+ * return 0 if it is sane, -1 otherwise. */
+static int
+validate_data_directories(or_options_t *options)
+{
+ tor_free(options->DataDirectory);
+ options->DataDirectory = get_data_directory(options->DataDirectory_option);
+ if (!options->DataDirectory)
+ return -1;
+ if (strlen(options->DataDirectory) > (512-128)) {
+ log_warn(LD_CONFIG, "DataDirectory is too long.");
+ return -1;
+ }
+
+ tor_free(options->KeyDirectory);
+ if (options->KeyDirectory_option) {
+ options->KeyDirectory = get_data_directory(options->KeyDirectory_option);
+ if (!options->KeyDirectory)
+ return -1;
+ } else {
+ /* Default to the data directory's keys subdir */
+ tor_asprintf(&options->KeyDirectory, "%s"PATH_SEPARATOR"keys",
+ options->DataDirectory);
+ }
+
+ tor_free(options->CacheDirectory);
+ if (options->CacheDirectory_option) {
+ options->CacheDirectory = get_data_directory(
+ options->CacheDirectory_option);
+ if (!options->CacheDirectory)
+ return -1;
+ } else {
+ /* Default to the data directory. */
+ options->CacheDirectory = tor_strdup(options->DataDirectory);
+ }
+
+ return 0;
+}
+
+/** This string must remain the same forevermore. It is how we
+ * recognize that the torrc file doesn't need to be backed up. */
+#define GENERATED_FILE_PREFIX "# This file was generated by Tor; " \
+ "if you edit it, comments will not be preserved"
+/** This string can change; it tries to give the reader an idea
+ * that editing this file by hand is not a good plan. */
+#define GENERATED_FILE_COMMENT "# The old torrc file was renamed " \
+ "to torrc.orig.1 or similar, and Tor will ignore it"
+
+/** Save a configuration file for the configuration in <b>options</b>
+ * into the file <b>fname</b>. If the file already exists, and
+ * doesn't begin with GENERATED_FILE_PREFIX, rename it. Otherwise
+ * replace it. Return 0 on success, -1 on failure. */
+static int
+write_configuration_file(const char *fname, const or_options_t *options)
+{
+ char *old_val=NULL, *new_val=NULL, *new_conf=NULL;
+ int rename_old = 0, r;
+
+ if (!fname)
+ return -1;
+
+ switch (file_status(fname)) {
+ /* create backups of old config files, even if they're empty */
+ case FN_FILE:
+ case FN_EMPTY:
+ old_val = read_file_to_str(fname, 0, NULL);
+ if (!old_val || strcmpstart(old_val, GENERATED_FILE_PREFIX)) {
+ rename_old = 1;
+ }
+ tor_free(old_val);
+ break;
+ case FN_NOENT:
+ break;
+ case FN_ERROR:
+ case FN_DIR:
+ default:
+ log_warn(LD_CONFIG,
+ "Config file \"%s\" is not a file? Failing.", fname);
+ return -1;
+ }
+
+ if (!(new_conf = options_dump(options, OPTIONS_DUMP_MINIMAL))) {
+ log_warn(LD_BUG, "Couldn't get configuration string");
+ goto err;
+ }
+
+ tor_asprintf(&new_val, "%s\n%s\n\n%s",
+ GENERATED_FILE_PREFIX, GENERATED_FILE_COMMENT, new_conf);
+
+ if (rename_old) {
+ int i = 1;
+ char *fn_tmp = NULL;
+ while (1) {
+ tor_asprintf(&fn_tmp, "%s.orig.%d", fname, i);
+ if (file_status(fn_tmp) == FN_NOENT)
+ break;
+ tor_free(fn_tmp);
+ ++i;
+ }
+ log_notice(LD_CONFIG, "Renaming old configuration file to \"%s\"", fn_tmp);
+ if (tor_rename(fname, fn_tmp) < 0) {//XXXX sandbox doesn't allow
+ log_warn(LD_FS,
+ "Couldn't rename configuration file \"%s\" to \"%s\": %s",
+ fname, fn_tmp, strerror(errno));
+ tor_free(fn_tmp);
+ goto err;
+ }
+ tor_free(fn_tmp);
+ }
+
+ if (write_str_to_file(fname, new_val, 0) < 0)
+ goto err;
+
+ r = 0;
+ goto done;
+ err:
+ r = -1;
+ done:
+ tor_free(new_val);
+ tor_free(new_conf);
+ return r;
+}
+
+/**
+ * Save the current configuration file value to disk. Return 0 on
+ * success, -1 on failure.
+ **/
+int
+options_save_current(void)
+{
+ /* This fails if we can't write to our configuration file.
+ *
+ * If we try falling back to datadirectory or something, we have a better
+ * chance of saving the configuration, but a better chance of doing
+ * something the user never expected. */
+ return write_configuration_file(get_torrc_fname(0), get_options());
+}
+
+/** Return the number of cpus configured in <b>options</b>. If we are
+ * told to auto-detect the number of cpus, return the auto-detected number. */
+int
+get_num_cpus(const or_options_t *options)
+{
+ if (options->NumCPUs == 0) {
+ int n = compute_num_cpus();
+ return (n >= 1) ? n : 1;
+ } else {
+ return options->NumCPUs;
+ }
+}
+
+/**
+ * Initialize the libevent library.
+ */
+static void
+init_libevent(const or_options_t *options)
+{
+ tor_libevent_cfg cfg;
+
+ tor_assert(options);
+
+ configure_libevent_logging();
+ /* If the kernel complains that some method (say, epoll) doesn't
+ * exist, we don't care about it, since libevent will cope.
+ */
+ suppress_libevent_log_msg("Function not implemented");
+
+ memset(&cfg, 0, sizeof(cfg));
+ cfg.num_cpus = get_num_cpus(options);
+ cfg.msec_per_tick = options->TokenBucketRefillInterval;
+
+ tor_libevent_initialize(&cfg);
+
+ suppress_libevent_log_msg(NULL);
+}
+
+/** Return a newly allocated string holding a filename relative to the
+ * directory in <b>options</b> specified by <b>roottype</b>.
+ * If <b>sub1</b> is present, it is the first path component after
+ * the data directory. If <b>sub2</b> is also present, it is the second path
+ * component after the data directory. If <b>suffix</b> is present, it
+ * is appended to the filename.
+ *
+ * Note: Consider using macros in config.h that wrap this function;
+ * you should probably never need to call it as-is.
+ */
+MOCK_IMPL(char *,
+options_get_dir_fname2_suffix,(const or_options_t *options,
+ directory_root_t roottype,
+ const char *sub1, const char *sub2,
+ const char *suffix))
+{
+ tor_assert(options);
+
+ const char *rootdir = NULL;
+ switch (roottype) {
+ case DIRROOT_DATADIR:
+ rootdir = options->DataDirectory;
+ break;
+ case DIRROOT_CACHEDIR:
+ rootdir = options->CacheDirectory;
+ break;
+ case DIRROOT_KEYDIR:
+ rootdir = options->KeyDirectory;
+ break;
+ default:
+ tor_assert_unreached();
+ break;
+ }
+ tor_assert(rootdir);
+
+ if (!suffix)
+ suffix = "";
+
+ char *fname = NULL;
+
+ if (sub1 == NULL) {
+ tor_asprintf(&fname, "%s%s", rootdir, suffix);
+ tor_assert(!sub2); /* If sub2 is present, sub1 must be present. */
+ } else if (sub2 == NULL) {
+ tor_asprintf(&fname, "%s"PATH_SEPARATOR"%s%s", rootdir, sub1, suffix);
+ } else {
+ tor_asprintf(&fname, "%s"PATH_SEPARATOR"%s"PATH_SEPARATOR"%s%s",
+ rootdir, sub1, sub2, suffix);
+ }
+
+ return fname;
+}
+
+/** Check wether the data directory has a private subdirectory
+ * <b>subdir</b>. If not, try to create it. Return 0 on success,
+ * -1 otherwise. */
+int
+check_or_create_data_subdir(const char *subdir)
+{
+ char *statsdir = get_datadir_fname(subdir);
+ int return_val = 0;
+
+ if (check_private_dir(statsdir, CPD_CREATE, get_options()->User) < 0) {
+ log_warn(LD_HIST, "Unable to create %s/ directory!", subdir);
+ return_val = -1;
+ }
+ tor_free(statsdir);
+ return return_val;
+}
+
+/** Create a file named <b>fname</b> with contents <b>str</b> in the
+ * subdirectory <b>subdir</b> of the data directory. <b>descr</b>
+ * should be a short description of the file's content and will be
+ * used for the warning message, if it's present and the write process
+ * fails. Return 0 on success, -1 otherwise.*/
+int
+write_to_data_subdir(const char* subdir, const char* fname,
+ const char* str, const char* descr)
+{
+ char *filename = get_datadir_fname2(subdir, fname);
+ int return_val = 0;
+
+ if (write_str_to_file(filename, str, 0) < 0) {
+ log_warn(LD_HIST, "Unable to write %s to disk!", descr ? descr : fname);
+ return_val = -1;
+ }
+ tor_free(filename);
+ return return_val;
+}
+
+/** Return a smartlist of ports that must be forwarded by
+ * tor-fw-helper. The smartlist contains the ports in a string format
+ * that is understandable by tor-fw-helper. */
+smartlist_t *
+get_list_of_ports_to_forward(void)
+{
+ smartlist_t *ports_to_forward = smartlist_new();
+ int port = 0;
+
+ /** XXX TODO tor-fw-helper does not support forwarding ports to
+ other hosts than the local one. If the user is binding to a
+ different IP address, tor-fw-helper won't work. */
+ port = router_get_advertised_or_port(get_options()); /* Get ORPort */
+ if (port)
+ smartlist_add_asprintf(ports_to_forward, "%d:%d", port, port);
+
+ port = router_get_advertised_dir_port(get_options(), 0); /* Get DirPort */
+ if (port)
+ smartlist_add_asprintf(ports_to_forward, "%d:%d", port, port);
+
+ /* Get ports of transport proxies */
+ {
+ smartlist_t *transport_ports = get_transport_proxy_ports();
+ if (transport_ports) {
+ smartlist_add_all(ports_to_forward, transport_ports);
+ smartlist_free(transport_ports);
+ }
+ }
+
+ if (!smartlist_len(ports_to_forward)) {
+ smartlist_free(ports_to_forward);
+ ports_to_forward = NULL;
+ }
+
+ return ports_to_forward;
+}
+
+/** Helper to implement GETINFO functions about configuration variables (not
+ * their values). Given a "config/names" question, set *<b>answer</b> to a
+ * new string describing the supported configuration variables and their
+ * types. */
+int
+getinfo_helper_config(control_connection_t *conn,
+ const char *question, char **answer,
+ const char **errmsg)
+{
+ (void) conn;
+ (void) errmsg;
+ if (!strcmp(question, "config/names")) {
+ smartlist_t *sl = smartlist_new();
+ int i;
+ for (i = 0; option_vars_[i].name; ++i) {
+ const config_var_t *var = &option_vars_[i];
+ const char *type;
+ /* don't tell controller about triple-underscore options */
+ if (!strncmp(option_vars_[i].name, "___", 3))
+ continue;
+ switch (var->type) {
+ case CONFIG_TYPE_STRING: type = "String"; break;
+ case CONFIG_TYPE_FILENAME: type = "Filename"; break;
+ case CONFIG_TYPE_UINT: type = "Integer"; break;
+ case CONFIG_TYPE_UINT64: type = "Integer"; break;
+ case CONFIG_TYPE_INT: type = "SignedInteger"; break;
+ case CONFIG_TYPE_PORT: type = "Port"; break;
+ case CONFIG_TYPE_INTERVAL: type = "TimeInterval"; break;
+ case CONFIG_TYPE_MSEC_INTERVAL: type = "TimeMsecInterval"; break;
+ case CONFIG_TYPE_MEMUNIT: type = "DataSize"; break;
+ case CONFIG_TYPE_DOUBLE: type = "Float"; break;
+ case CONFIG_TYPE_BOOL: type = "Boolean"; break;
+ case CONFIG_TYPE_AUTOBOOL: type = "Boolean+Auto"; break;
+ case CONFIG_TYPE_ISOTIME: type = "Time"; break;
+ case CONFIG_TYPE_ROUTERSET: type = "RouterList"; break;
+ case CONFIG_TYPE_CSV: type = "CommaList"; break;
+ /* This type accepts more inputs than TimeInterval, but it ignores
+ * everything after the first entry, so we may as well pretend
+ * it's a TimeInterval. */
+ case CONFIG_TYPE_CSV_INTERVAL: type = "TimeInterval"; break;
+ case CONFIG_TYPE_LINELIST: type = "LineList"; break;
+ case CONFIG_TYPE_LINELIST_S: type = "Dependent"; break;
+ case CONFIG_TYPE_LINELIST_V: type = "Virtual"; break;
+ default:
+ case CONFIG_TYPE_OBSOLETE:
+ type = NULL; break;
+ }
+ if (!type)
+ continue;
+ smartlist_add_asprintf(sl, "%s %s\n",var->name,type);
+ }
+ *answer = smartlist_join_strings(sl, "", 0, NULL);
+ SMARTLIST_FOREACH(sl, char *, c, tor_free(c));
+ smartlist_free(sl);
+ } else if (!strcmp(question, "config/defaults")) {
+ smartlist_t *sl = smartlist_new();
+ int dirauth_lines_seen = 0, fallback_lines_seen = 0;
+ for (int i = 0; option_vars_[i].name; ++i) {
+ const config_var_t *var = &option_vars_[i];
+ if (var->initvalue != NULL) {
+ if (strcmp(option_vars_[i].name, "DirAuthority") == 0) {
+ /*
+ * Count dirauth lines we have a default for; we'll use the
+ * count later to decide whether to add the defaults manually
+ */
+ ++dirauth_lines_seen;
+ }
+ if (strcmp(option_vars_[i].name, "FallbackDir") == 0) {
+ /*
+ * Similarly count fallback lines, so that we can decided later
+ * to add the defaults manually.
+ */
+ ++fallback_lines_seen;
+ }
+ char *val = esc_for_log(var->initvalue);
+ smartlist_add_asprintf(sl, "%s %s\n",var->name,val);
+ tor_free(val);
+ }
+ }
+
+ if (dirauth_lines_seen == 0) {
+ /*
+ * We didn't see any directory authorities with default values,
+ * so add the list of default authorities manually.
+ */
+
+ /*
+ * default_authorities is defined earlier in this file and
+ * is a const char ** NULL-terminated array of dirauth config
+ * lines.
+ */
+ for (const char **i = default_authorities; *i != NULL; ++i) {
+ char *val = esc_for_log(*i);
+ smartlist_add_asprintf(sl, "DirAuthority %s\n", val);
+ tor_free(val);
+ }
+ }
+
+ if (fallback_lines_seen == 0 &&
+ get_options()->UseDefaultFallbackDirs == 1) {
+ /*
+ * We didn't see any explicitly configured fallback mirrors,
+ * so add the defaults to the list manually.
+ *
+ * default_fallbacks is included earlier in this file and
+ * is a const char ** NULL-terminated array of fallback config lines.
+ */
+ const char **i;
+
+ for (i = default_fallbacks; *i != NULL; ++i) {
+ char *val = esc_for_log(*i);
+ smartlist_add_asprintf(sl, "FallbackDir %s\n", val);
+ tor_free(val);
+ }
+ }
+
+ *answer = smartlist_join_strings(sl, "", 0, NULL);
+ SMARTLIST_FOREACH(sl, char *, c, tor_free(c));
+ smartlist_free(sl);
+ }
+ return 0;
+}
+
+/* Check whether an address has already been set against the options
+ * depending on address family and destination type. Any exsting
+ * value will lead to a fail, even if it is the same value. If not
+ * set and not only validating, copy it into this location too.
+ * Returns 0 on success or -1 if this address is already set.
+ */
+static int
+verify_and_store_outbound_address(sa_family_t family, tor_addr_t *addr,
+ outbound_addr_t type, or_options_t *options, int validate_only)
+{
+ if (type>=OUTBOUND_ADDR_MAX || (family!=AF_INET && family!=AF_INET6)) {
+ return -1;
+ }
+ int fam_index=0;
+ if (family==AF_INET6) {
+ fam_index=1;
+ }
+ tor_addr_t *dest=&options->OutboundBindAddresses[type][fam_index];
+ if (!tor_addr_is_null(dest)) {
+ return -1;
+ }
+ if (!validate_only) {
+ tor_addr_copy(dest, addr);
+ }
+ return 0;
+}
+
+/* Parse a list of address lines for a specific destination type.
+ * Will store them into the options if not validate_only. If a
+ * problem occurs, a suitable error message is store in msg.
+ * Returns 0 on success or -1 if any address is already set.
+ */
+static int
+parse_outbound_address_lines(const config_line_t *lines, outbound_addr_t type,
+ or_options_t *options, int validate_only, char **msg)
+{
+ tor_addr_t addr;
+ sa_family_t family;
+ while (lines) {
+ family = tor_addr_parse(&addr, lines->value);
+ if (verify_and_store_outbound_address(family, &addr, type,
+ options, validate_only)) {
+ if (msg)
+ tor_asprintf(msg, "Multiple%s%s outbound bind addresses "
+ "configured: %s",
+ family==AF_INET?" IPv4":(family==AF_INET6?" IPv6":""),
+ type==OUTBOUND_ADDR_OR?" OR":
+ (type==OUTBOUND_ADDR_EXIT?" exit":""), lines->value);
+ return -1;
+ }
+ lines = lines->next;
+ }
+ return 0;
+}
+
+/** Parse outbound bind address option lines. If <b>validate_only</b>
+ * is not 0 update OutboundBindAddresses in <b>options</b>.
+ * Only one address can be set for any of these values.
+ * On failure, set <b>msg</b> (if provided) to a newly allocated string
+ * containing a description of the problem and return -1.
+ */
+static int
+parse_outbound_addresses(or_options_t *options, int validate_only, char **msg)
+{
+ if (!validate_only) {
+ memset(&options->OutboundBindAddresses, 0,
+ sizeof(options->OutboundBindAddresses));
+ }
+
+ if (parse_outbound_address_lines(options->OutboundBindAddress,
+ OUTBOUND_ADDR_EXIT_AND_OR, options,
+ validate_only, msg) < 0) {
+ goto err;
+ }
+
+ if (parse_outbound_address_lines(options->OutboundBindAddressOR,
+ OUTBOUND_ADDR_OR, options, validate_only,
+ msg) < 0) {
+ goto err;
+ }
+
+ if (parse_outbound_address_lines(options->OutboundBindAddressExit,
+ OUTBOUND_ADDR_EXIT, options, validate_only,
+ msg) < 0) {
+ goto err;
+ }
+
+ return 0;
+ err:
+ return -1;
+}
+
+/** Load one of the geoip files, <a>family</a> determining which
+ * one. <a>default_fname</a> is used if on Windows and
+ * <a>fname</a> equals "<default>". */
+static void
+config_load_geoip_file_(sa_family_t family,
+ const char *fname,
+ const char *default_fname)
+{
+ const or_options_t *options = get_options();
+ const char *msg = "";
+ int severity = options_need_geoip_info(options, &msg) ? LOG_WARN : LOG_INFO;
+ int r;
+
+#ifdef _WIN32
+ char *free_fname = NULL; /* Used to hold any temporary-allocated value */
+ /* XXXX Don't use this "<default>" junk; make our filename options
+ * understand prefixes somehow. -NM */
+ if (!strcmp(fname, "<default>")) {
+ const char *conf_root = get_windows_conf_root();
+ tor_asprintf(&free_fname, "%s\\%s", conf_root, default_fname);
+ fname = free_fname;
+ }
+ r = geoip_load_file(family, fname, severity);
+ tor_free(free_fname);
+#else /* !(defined(_WIN32)) */
+ (void)default_fname;
+ r = geoip_load_file(family, fname, severity);
+#endif /* defined(_WIN32) */
+
+ if (r < 0 && severity == LOG_WARN) {
+ log_warn(LD_GENERAL, "%s", msg);
+ }
+}
+
+/** Load geoip files for IPv4 and IPv6 if <a>options</a> and
+ * <a>old_options</a> indicate we should. */
+static void
+config_maybe_load_geoip_files_(const or_options_t *options,
+ const or_options_t *old_options)
+{
+ /* XXXX Reload GeoIPFile on SIGHUP. -NM */
+
+ if (options->GeoIPFile &&
+ ((!old_options || !opt_streq(old_options->GeoIPFile,
+ options->GeoIPFile))
+ || !geoip_is_loaded(AF_INET))) {
+ config_load_geoip_file_(AF_INET, options->GeoIPFile, "geoip");
+ /* Okay, now we need to maybe change our mind about what is in
+ * which country. We do this for IPv4 only since that's what we
+ * store in node->country. */
+ refresh_all_country_info();
+ }
+ if (options->GeoIPv6File &&
+ ((!old_options || !opt_streq(old_options->GeoIPv6File,
+ options->GeoIPv6File))
+ || !geoip_is_loaded(AF_INET6))) {
+ config_load_geoip_file_(AF_INET6, options->GeoIPv6File, "geoip6");
+ }
+}
+
+/** Initialize cookie authentication (used so far by the ControlPort
+ * and Extended ORPort).
+ *
+ * Allocate memory and create a cookie (of length <b>cookie_len</b>)
+ * in <b>cookie_out</b>.
+ * Then write it down to <b>fname</b> and prepend it with <b>header</b>.
+ *
+ * If <b>group_readable</b> is set, set <b>fname</b> to be readable
+ * by the default GID.
+ *
+ * If the whole procedure was successful, set
+ * <b>cookie_is_set_out</b> to True. */
+int
+init_cookie_authentication(const char *fname, const char *header,
+ int cookie_len, int group_readable,
+ uint8_t **cookie_out, int *cookie_is_set_out)
+{
+ char cookie_file_str_len = strlen(header) + cookie_len;
+ char *cookie_file_str = tor_malloc(cookie_file_str_len);
+ int retval = -1;
+
+ /* We don't want to generate a new cookie every time we call
+ * options_act(). One should be enough. */
+ if (*cookie_is_set_out) {
+ retval = 0; /* we are all set */
+ goto done;
+ }
+
+ /* If we've already set the cookie, free it before re-setting
+ it. This can happen if we previously generated a cookie, but
+ couldn't write it to a disk. */
+ if (*cookie_out)
+ tor_free(*cookie_out);
+
+ /* Generate the cookie */
+ *cookie_out = tor_malloc(cookie_len);
+ crypto_rand((char *)*cookie_out, cookie_len);
+
+ /* Create the string that should be written on the file. */
+ memcpy(cookie_file_str, header, strlen(header));
+ memcpy(cookie_file_str+strlen(header), *cookie_out, cookie_len);
+ if (write_bytes_to_file(fname, cookie_file_str, cookie_file_str_len, 1)) {
+ log_warn(LD_FS,"Error writing auth cookie to %s.", escaped(fname));
+ goto done;
+ }
+
+#ifndef _WIN32
+ if (group_readable) {
+ if (chmod(fname, 0640)) {
+ log_warn(LD_FS,"Unable to make %s group-readable.", escaped(fname));
+ }
+ }
+#else /* !(!defined(_WIN32)) */
+ (void) group_readable;
+#endif /* !defined(_WIN32) */
+
+ /* Success! */
+ log_info(LD_GENERAL, "Generated auth cookie file in '%s'.", escaped(fname));
+ *cookie_is_set_out = 1;
+ retval = 0;
+
+ done:
+ memwipe(cookie_file_str, 0, cookie_file_str_len);
+ tor_free(cookie_file_str);
+ return retval;
+}
+
+/**
+ * Return true if any option is set in <b>options</b> to make us behave
+ * as a client.
+ */
+int
+options_any_client_port_set(const or_options_t *options)
+{
+ return (options->SocksPort_set ||
+ options->TransPort_set ||
+ options->NATDPort_set ||
+ options->DNSPort_set ||
+ options->HTTPTunnelPort_set);
+}
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