Merge branch 'maint-0.2.4' into release-0.2.4

changes/bug9309

@@ -0,0 +1,6 @@
+  o Minor bugfixes:
+    - When evaluating whether to use a connection that we haven't
+      decided is canonical using a recent link protocol version,
+      decide that it's canonical only if it used address _does_
+      match the desired address. Fixes bug 9309; bugfix on
+      0.2.4.4-alpha. Reported by skruffy.

changes/bug9337

@@ -0,0 +1,4 @@
+  o Major bugfixes (DNS):
+    - Avoid an assertion failure when processing DNS replies without the
+      answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
+

src/or/channel.c

@@ -3037,7 +3037,7 @@ channel_get_for_extend(const char *digest,
     if (chan->state != CHANNEL_STATE_OPEN) {
       /* If the address matches, don't launch a new connection for this
        * circuit. */
-      if (!channel_matches_target_addr_for_extend(chan, target_addr))
+      if (channel_matches_target_addr_for_extend(chan, target_addr))
         ++n_inprogress_goodaddr;
       continue;
     }
@@ -4053,7 +4053,7 @@ channel_matches_extend_info(channel_t *chan, extend_info_t *extend_info)
 }
 
 /**
- * Check if a channel matches a given target address
+ * Check if a channel matches a given target address; return true iff we do.
  *
  * This function calls into the lower layer and asks if this channel thinks
  * it matches a given target address for circuit extension purposes.

src/or/channeltls.c

@@ -546,7 +546,7 @@ channel_tls_matches_extend_info_method(channel_t *chan,
 }
 
 /**
- * Check if we match a target address
+ * Check if we match a target address; return true iff we do.
  *
  * This implements the matches_target method for channel_tls t_; the upper
  * layer wants to know if this channel matches a target address when extending
@@ -563,8 +563,7 @@ channel_tls_matches_target_method(channel_t *chan,
   tor_assert(target);
   tor_assert(tlschan->conn);
 
-  return tor_addr_compare(&(tlschan->conn->real_addr),
-                          target, CMP_EXACT);
+  return tor_addr_eq(&(tlschan->conn->real_addr), target);
 }
 
 /**

src/or/dns.c

@@ -437,8 +437,8 @@ cached_resolve_add_answer(cached_resolve_t *resolve,
     if (resolve->res_status_ipv4 != RES_STATUS_INFLIGHT)
       return;
 
-    if (dns_result == DNS_ERR_NONE && answer_addr) {
-      tor_assert(tor_addr_family(answer_addr) == AF_INET);
+    if (dns_result == DNS_ERR_NONE && answer_addr &&
+        tor_addr_family(answer_addr) == AF_INET) {
       resolve->result_ipv4.addr_ipv4 = tor_addr_to_ipv4h(answer_addr);
       resolve->res_status_ipv4 = RES_STATUS_DONE_OK;
     } else {
@@ -450,8 +450,8 @@ cached_resolve_add_answer(cached_resolve_t *resolve,
     if (resolve->res_status_ipv6 != RES_STATUS_INFLIGHT)
       return;
 
-    if (dns_result == DNS_ERR_NONE && answer_addr) {
-      tor_assert(tor_addr_family(answer_addr) == AF_INET6);
+    if (dns_result == DNS_ERR_NONE && answer_addr &&
+        tor_addr_family(answer_addr) == AF_INET6) {
       memcpy(&resolve->result_ipv6.addr_ipv6,
              tor_addr_to_in6(answer_addr),
              sizeof(struct in6_addr));