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[tor-commits] [tor/maint-0.4.6] relay: Emit log warning if Address is internal and can't be used



commit 6281c90885b09d3c5faad51cbb4cee686a4bb8ff
Author: David Goulet <dgoulet@xxxxxxxxxxxxxx>
Date:   Thu Mar 25 10:15:50 2021 -0400

    relay: Emit log warning if Address is internal and can't be used
    
    Signed-off-by: David Goulet <dgoulet@xxxxxxxxxxxxxx>
---
 changes/ticket40290           |  3 +++
 src/app/config/resolve_addr.c | 12 ++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/changes/ticket40290 b/changes/ticket40290
new file mode 100644
index 0000000000..3d3a64be93
--- /dev/null
+++ b/changes/ticket40290
@@ -0,0 +1,3 @@
+  o Minor bugfix (logging, relay):
+    - Emit a warning if an Address is found to be internal and tor can't use it.
+      Fixes bug 40290; bugfix on 0.4.5.1-alpha.
diff --git a/src/app/config/resolve_addr.c b/src/app/config/resolve_addr.c
index 43a3eb39de..09d4b800f6 100644
--- a/src/app/config/resolve_addr.c
+++ b/src/app/config/resolve_addr.c
@@ -343,6 +343,18 @@ get_address_from_config(const or_options_t *options, int warn_severity,
      * used, custom authorities must be defined else it is a fatal error.
      * Furthermore, if the Address was resolved to an internal interface, we
      * stop immediately. */
+    if (ret == ERR_ADDRESS_IS_INTERNAL) {
+      static bool logged_once = false;
+      if (!logged_once) {
+        log_warn(LD_CONFIG, "Address set with an internal address. Tor will "
+                            "not work unless custom directory authorities "
+                            "are defined (AlternateDirAuthority). It is also "
+                            "possible to use an internal address if "
+                            "PublishServerDescriptor is set to 0 and "
+                            "AssumeReachable(IPv6) to 1.");
+        logged_once = true;
+      }
+    }
     tor_free(*hostname_out);
     return FN_RET_BAIL;
   }



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