[tor-commits] [tor/master] Add regression test for ClientAutoIPv6ORPort

[nickm@xxxxxxxxxxxxxx]

commit ad031b64ce355ac3af15adb716a4322858dce4a8
Author: Neel Chauhan <neel@xxxxxxxxx>
Date:   Tue Oct 16 20:14:27 2018 -0400

    Add regression test for ClientAutoIPv6ORPort
---
 src/core/or/policies.c |  4 ++--
 src/core/or/policies.h |  1 +
 src/test/test_policy.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+), 2 deletions(-)

diff --git a/src/core/or/policies.c b/src/core/or/policies.c
index 6da369bf3..c630c2fbd 100644
--- a/src/core/or/policies.c
+++ b/src/core/or/policies.c
@@ -491,8 +491,8 @@ fascist_firewall_prefer_ipv6_impl(const or_options_t *options)
 
 /* Choose whether we prefer IPv4 or IPv6 by randomly choosing an address
  * family. Return 0 for IPv4, and 1 for IPv6. */
-static int
-fascist_firewall_rand_prefer_ipv6_addr(void)
+MOCK_IMPL(int,
+fascist_firewall_rand_prefer_ipv6_addr, (void))
 {
   /* TODO: Check for failures, and infer our preference based on this. */
   return crypto_rand_int(2);
diff --git a/src/core/or/policies.h b/src/core/or/policies.h
index 7da3ba031..0c64ecf37 100644
--- a/src/core/or/policies.h
+++ b/src/core/or/policies.h
@@ -70,6 +70,7 @@ typedef struct short_policy_t {
 int firewall_is_fascist_or(void);
 int firewall_is_fascist_dir(void);
 int fascist_firewall_use_ipv6(const or_options_t *options);
+MOCK_DECL(int, fascist_firewall_rand_prefer_ipv6_addr, (void));
 int fascist_firewall_prefer_ipv6_orport(const or_options_t *options);
 int fascist_firewall_prefer_ipv6_dirport(const or_options_t *options);
 
diff --git a/src/test/test_policy.c b/src/test/test_policy.c
index 6a07e5b1f..cc9023d6a 100644
--- a/src/test/test_policy.c
+++ b/src/test/test_policy.c
@@ -2023,6 +2023,20 @@ test_policies_fascist_firewall_allows_address(void *arg)
                            expect_ap); \
   STMT_END
 
+/** Mock the preferred address function to return zero (prefer IPv4). */
+static int
+mock_fascist_firewall_rand_prefer_ipv6_addr_use_ipv4(void)
+{
+  return 0;
+}
+
+/** Mock the preferred address function to return one (prefer IPv6). */
+static int
+mock_fascist_firewall_rand_prefer_ipv6_addr_use_ipv6(void)
+{
+  return 1;
+}
+
 /** Run unit tests for fascist_firewall_choose_address */
 static void
 test_policies_fascist_firewall_choose_address(void *arg)
@@ -2421,6 +2435,42 @@ test_policies_fascist_firewall_choose_address(void *arg)
   CHECK_CHOSEN_ADDR_RN(fake_rs, fake_node, FIREWALL_DIR_CONNECTION, 1, 1,
                        ipv4_dir_ap);
 
+  /* Test ClientAutoIPv6ORPort and pretend we prefer IPv4. */
+  memset(&mock_options, 0, sizeof(or_options_t));
+  mock_options.ClientAutoIPv6ORPort = 1;
+  mock_options.ClientUseIPv4 = 1;
+  mock_options.ClientUseIPv6 = 1;
+  MOCK(fascist_firewall_rand_prefer_ipv6_addr,
+       mock_fascist_firewall_rand_prefer_ipv6_addr_use_ipv4);
+  /* Simulate the initialisation of fake_node.ipv6_preferred */
+  fake_node.ipv6_preferred = fascist_firewall_prefer_ipv6_orport(
+                                                                &mock_options);
+
+  CHECK_CHOSEN_ADDR_RN(fake_rs, fake_node, FIREWALL_OR_CONNECTION, 0, 1,
+                       ipv4_or_ap);
+  CHECK_CHOSEN_ADDR_RN(fake_rs, fake_node, FIREWALL_OR_CONNECTION, 1, 1,
+                       ipv4_or_ap);
+
+  UNMOCK(fascist_firewall_rand_prefer_ipv6_addr);
+
+  /* Test ClientAutoIPv6ORPort and pretend we prefer IPv6. */
+  memset(&mock_options, 0, sizeof(or_options_t));
+  mock_options.ClientAutoIPv6ORPort = 1;
+  mock_options.ClientUseIPv4 = 1;
+  mock_options.ClientUseIPv6 = 1;
+  MOCK(fascist_firewall_rand_prefer_ipv6_addr,
+       mock_fascist_firewall_rand_prefer_ipv6_addr_use_ipv6);
+  /* Simulate the initialisation of fake_node.ipv6_preferred */
+  fake_node.ipv6_preferred = fascist_firewall_prefer_ipv6_orport(
+                                                                &mock_options);
+
+  CHECK_CHOSEN_ADDR_RN(fake_rs, fake_node, FIREWALL_OR_CONNECTION, 0, 1,
+                       ipv6_or_ap);
+  CHECK_CHOSEN_ADDR_RN(fake_rs, fake_node, FIREWALL_OR_CONNECTION, 1, 1,
+                       ipv6_or_ap);
+
+  UNMOCK(fascist_firewall_rand_prefer_ipv6_addr);
+
  done:
   UNMOCK(get_options);
 }



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