[tor-commits] [tor/master] Add IPv6 support to compare_to_addr_to_node_policy

[nickm at torproject.org]

commit b35a0d113233fa29439500555201b85c1dec64b1
Author: Nick Mathewson <nickm at torproject.org>
Date:   Wed Oct 24 23:05:44 2012 -0400

    Add IPv6 support to compare_to_addr_to_node_policy
---
 src/or/policies.c |   19 ++++++++++++++++---
 src/or/router.c   |   19 +++++++++++++++++++
 2 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/src/or/policies.c b/src/or/policies.c
index 8367446..16b3e4f 100644
--- a/src/or/policies.c
+++ b/src/or/policies.c
@@ -1616,16 +1616,29 @@ compare_tor_addr_to_node_policy(const tor_addr_t *addr, uint16_t port,
   if (node->rejects_all)
     return ADDR_POLICY_REJECTED;
 
-  if (node->ri)
+  if (addr && tor_addr_family(addr) == AF_INET6) {
+    const short_policy_t *p = NULL;
+    if (node->ri)
+      p = node->ri->ipv6_exit_policy;
+    else if (node->md)
+      p = node->md->ipv6_exit_policy;
+    if (p)
+      return compare_tor_addr_to_short_policy(addr, port, p);
+    else
+      return ADDR_POLICY_REJECTED;
+  }
+
+  if (node->ri) {
     return compare_tor_addr_to_addr_policy(addr, port, node->ri->exit_policy);
-  else if (node->md) {
+  } else if (node->md) {
     if (node->md->exit_policy == NULL)
       return ADDR_POLICY_REJECTED;
     else
       return compare_tor_addr_to_short_policy(addr, port,
                                               node->md->exit_policy);
-  } else
+  } else {
     return ADDR_POLICY_PROBABLY_REJECTED;
+  }
 }
 
 /** Implementation for GETINFO control command: knows the answer for questions
diff --git a/src/or/router.c b/src/or/router.c
index efe24d7..cdd33bb 100644
--- a/src/or/router.c
+++ b/src/or/router.c
@@ -1609,6 +1609,11 @@ router_rebuild_descriptor(int force)
   }
   ri->policy_is_reject_star =
     policy_is_reject_star(ri->exit_policy);
+#if 0
+  /* XXXX024 Don't actually enable this code until exiting to an IPv6
+   * address works. */
+  ri->ipv6_exit_policy = policy_summarize(&ri->exit_policy, AF_INET6);
+#endif
 
 #if 0
   /* XXXX NM NM I belive this is safe to remove */
@@ -2150,6 +2155,20 @@ router_dump_router_to_string(char *s, size_t maxlen, routerinfo_t *router,
     }
   }
 
+  if (router->ipv6_exit_policy) {
+    char *p6 = write_short_policy(router->ipv6_exit_policy);
+    if (p6 && strcmp(p6, "reject 1-65535")) {
+      result = tor_snprintf(s+written, maxlen-written,
+                            "ipv6-policy %s\n", p6);
+      if (result<0) {
+        log_warn(LD_BUG,"Descriptor printf of policy ran out of room");
+        return -1;
+      }
+      written += result;
+    }
+    tor_free(p6);
+  }
+
   if (written + DIROBJ_MAX_SIG_LEN > maxlen) {
     /* Not enough room for signature. */
     log_warn(LD_BUG,"not enough room left in descriptor for signature!");