From a335b43a6719e02f135415a1c9ef860d80a4bdac Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Wed, 18 Mar 2009 19:30:30 +0000
Subject: [PATCH] If we have a routerstatus but no routerinfo to name a router,
 use the routerstatus instead when generating circuit events.  Also refactor a
 little.

svn:r19078
---
 ChangeLog             |  6 ++++++
 src/or/circuitbuild.c | 18 ++++++++++--------
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 7f6315020f..d003e273d1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -13,6 +13,12 @@ Changes in version 0.2.1.14-??? - 2009-03-??
     - Avoid double-free on list of successfully uploaded hidden
       service discriptors.  Fix for bug 948.  Bugfix on 0.2.1.6-alpha.
 
+  o Minor features (controller):
+    - Try harder to look up nicknames for routers on a circuit when
+      generating circuit events with verbose nicknames.  (Previously, we
+      would look in the router descriptors we had for nicknames, but not
+      in the consensus.)  Partial fix for bug 941.
+
 
 Changes in version 0.2.1.13-alpha - 2009-03-09
   Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
diff --git a/src/or/circuitbuild.c b/src/or/circuitbuild.c
index 1cda8e870d..9e2f826c42 100644
--- a/src/or/circuitbuild.c
+++ b/src/or/circuitbuild.c
@@ -133,39 +133,41 @@ circuit_list_path_impl(origin_circuit_t *circ, int verbose, int verbose_names)
   hop = circ->cpath;
   do {
     routerinfo_t *ri;
+    routerstatus_t *rs;
     char *elt;
+    const char *id;
     if (!hop)
       break;
+    id = hop->extend_info->identity_digest;
     if (!verbose && hop->state != CPATH_STATE_OPEN)
       break;
     if (!hop->extend_info)
       break;
     if (verbose_names) {
       elt = tor_malloc(MAX_VERBOSE_NICKNAME_LEN+1);
-      if ((ri = router_get_by_digest(hop->extend_info->identity_digest))) {
+      if ((ri = router_get_by_digest(id))) {
         router_get_verbose_nickname(elt, ri);
+      } else if ((rs = router_get_consensus_status_by_id(id))) {
+        routerstatus_get_verbose_nickname(elt, rs);
       } else if (hop->extend_info->nickname &&
                  is_legal_nickname(hop->extend_info->nickname)) {
         elt[0] = '$';
-        base16_encode(elt+1, HEX_DIGEST_LEN+1,
-                      hop->extend_info->identity_digest, DIGEST_LEN);
+        base16_encode(elt+1, HEX_DIGEST_LEN+1, id, DIGEST_LEN);
         elt[HEX_DIGEST_LEN+1]= '~';
         strlcpy(elt+HEX_DIGEST_LEN+2,
                 hop->extend_info->nickname, MAX_NICKNAME_LEN+1);
       } else {
         elt[0] = '$';
-        base16_encode(elt+1, HEX_DIGEST_LEN+1,
-                      hop->extend_info->identity_digest, DIGEST_LEN);
+        base16_encode(elt+1, HEX_DIGEST_LEN+1, id, DIGEST_LEN);
       }
     } else { /* ! verbose_names */
-      if ((ri = router_get_by_digest(hop->extend_info->identity_digest)) &&
+      if ((ri = router_get_by_digest(id)) &&
           ri->is_named) {
         elt = tor_strdup(hop->extend_info->nickname);
       } else {
         elt = tor_malloc(HEX_DIGEST_LEN+2);
         elt[0] = '$';
-        base16_encode(elt+1, HEX_DIGEST_LEN+1,
-                      hop->extend_info->identity_digest, DIGEST_LEN);
+        base16_encode(elt+1, HEX_DIGEST_LEN+1, id, DIGEST_LEN);
       }
     }
     tor_assert(elt);