[tor-commits] [tor/maint-0.3.2] Rewrite bridge addresses earlier

[nickm at torproject.org]

commit 9b60acd4d4ee451fd961b1f03ae46eee960c72ee
Author: Taylor Yu <catalyst at torproject.org>
Date:   Thu Sep 28 17:15:47 2017 -0500

    Rewrite bridge addresses earlier
    
    Call rewrite_node_address_for_bridge() in
    launch_direct_bridge_descriptor_fetch() in case there's an existing
    node_t for it.
---
 changes/bug20532 | 4 ++++
 src/or/bridges.c | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/changes/bug20532 b/changes/bug20532
new file mode 100644
index 000000000..7c190ea03
--- /dev/null
+++ b/changes/bug20532
@@ -0,0 +1,4 @@
+  o Minor bugfixes (bridges):
+    - Overwrite the bridge address earlier in the process of directly
+      retrieving its descriptor, to make sure we reach it on the configured
+      address.  Fixes bug 20532; bugfix on 0.2.0.10-alpha.
diff --git a/src/or/bridges.c b/src/or/bridges.c
index 0818fb081..0bcc3eeb4 100644
--- a/src/or/bridges.c
+++ b/src/or/bridges.c
@@ -54,6 +54,8 @@ struct bridge_info_t {
 };
 
 static void bridge_free(bridge_info_t *bridge);
+static void rewrite_node_address_for_bridge(const bridge_info_t *bridge,
+                                            node_t *node);
 
 /** A list of configured bridges. Whenever we actually get a descriptor
  * for one, we add it as an entry guard.  Note that the order of bridges
@@ -571,6 +573,12 @@ launch_direct_bridge_descriptor_fetch(bridge_info_t *bridge)
     return;
   }
 
+  /* If we already have a node_t for this bridge, rewrite its address now. */
+  node_t *node = node_get_mutable_by_id(bridge->identity);
+  if (node) {
+    rewrite_node_address_for_bridge(bridge, node);
+  }
+
   tor_addr_port_t bridge_addrport;
   memcpy(&bridge_addrport.addr, &bridge->addr, sizeof(tor_addr_t));
   bridge_addrport.port = bridge->port;