From 3664c3d63e45d1f3ad18b4ba5c08d2ef65fd3f85 Mon Sep 17 00:00:00 2001
From: russell <russell@f38db490-d61c-443f-a65b-d21fe96a405b>
Date: Fri, 4 Sep 2009 13:56:09 +0000
Subject: Merged revisions 216368 via svnmerge from
 https://origsvn.digium.com/svn/asterisk/trunk

........
  r216368 | russell | 2009-09-04 08:14:25 -0500 (Fri, 04 Sep 2009) | 12 lines

  Do not treat every SIP peer as if they were configured with insecure=port.

  There was a problem in the function responsible for doing peer matching by
  IP address and port number such that during the second pass for checking for
  a peer configured with insecure=port, it would end up treating every peer as
  if it had been configured that way.  These changes fix the logic in the peer
  IP and port comparison callback to handle insecure=port checking properly.

  This problem was introduced when SIP peers were converted to astobj2.  Many
  thanks to dvossel for noticing this while working on another peer matching
  issue.
........


git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.6.1@216434 f38db490-d61c-443f-a65b-d21fe96a405b
---
 channels/chan_sip.c | 33 +++++++++++++++++++++++++--------
 1 file changed, 25 insertions(+), 8 deletions(-)

(limited to 'channels')

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index c03477466..418336d19 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -1699,6 +1699,19 @@ static int peer_iphash_cb(const void *obj, const int flags)
 }
 
 /*!
+ * Match Peers by IP and Port number.
+ *
+ * This function has two modes.
+ *  - If the peer arg does not have INSECURE_PORT set, then we will only return
+ *    a match for a peer that matches both the IP and port.
+ *  - If the peer arg does have the INSECURE_PORT flag set, then we will only
+ *    return a match for a peer that matches the IP and has insecure=port
+ *    in its configuration.
+ *
+ * This callback will be used twice when doing peer matching.  There is a first
+ * pass for full IP+port matching, and a second pass in case there is a match
+ * that meets the insecure=port criteria.
+ *
  * \note the peer's addr struct provides to fields combined to make a key: the sin_addr.s_addr and sin_port fields.
  */
 static int peer_ipcmp_cb(void *obj, void *arg, int flags)
@@ -1706,18 +1719,22 @@ static int peer_ipcmp_cb(void *obj, void *arg, int flags)
 	struct sip_peer *peer = obj, *peer2 = arg;
 
 	if (peer->addr.sin_addr.s_addr != peer2->addr.sin_addr.s_addr) {
+		/* IP doesn't match */
 		return 0;
 	}
-	
-	if (!ast_test_flag(&peer->flags[0], SIP_INSECURE_PORT) && !ast_test_flag(&peer2->flags[0], SIP_INSECURE_PORT)) {
-		if (peer->addr.sin_port == peer2->addr.sin_port) {
-			return CMP_MATCH | CMP_STOP;
-		} else {
-			return 0;
-		}
+
+	/* We matched the IP, now check the port if appropriate. */
+
+	if (ast_test_flag(&peer2->flags[0], SIP_INSECURE_PORT)) {
+		/* We are allowing match without port for peers configured that
+		 * way in this pass through the peers. */
+		return ast_test_flag(&peer->flags[0], SIP_INSECURE_PORT) ?
+				(CMP_MATCH | CMP_STOP) : 0;
 	}
 
-	return CMP_MATCH | CMP_STOP;
+	/* Only return a match if the port matches, as well. */
+
+	return peer->addr.sin_port == peer2->addr.sin_port ? (CMP_MATCH | CMP_STOP) : 0;
 }
 
 /*!
-- 
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