From eaad3ab395c8da0cc5c8cbe3e51109f181891216 Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Thu, 24 Apr 2008 15:39:10 +0000
Subject: Spec compliance: sort id fingerprints in consensus get requests

svn:r14450
---
 src/or/directory.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/or/directory.c b/src/or/directory.c
index 135ba54da..fd2e215df 100644
--- a/src/or/directory.c
+++ b/src/or/directory.c
@@ -773,6 +773,17 @@ connection_dir_is_encrypted(dir_connection_t *conn)
   return TO_CONN(conn)->linked;
 }
 
+/** Helper for sorting
+ *
+ * sort strings alphabetically
+ */
+static int
+_compare_strs(const void **a, const void **b)
+{
+  const char *s1 = *a, *s2 = *b;
+  return strcmp(s1, s2);
+}
+
 /** Return the URL we should use for a consensus download.
  *
  * This url depends on whether or not the server we go to
@@ -801,6 +812,7 @@ directory_get_consensus_url(int supports_conditional_consensus)
                       ds->digest, CONDITIONAL_CONSENSUS_FPR_LEN);
         smartlist_add(authority_digets, hex);
       });
+    smartlist_sort(authority_digets, _compare_strs);
     authority_id_list = smartlist_join_strings(authority_digets,
                                                "+", 0, NULL);
 
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