We don't handle 4XX responses to BYE well. According to

section 15 of RFC 3261, we should terminate a dialog if we
receive a 481 or 408 in response to our BYE. Since I am aware
of at least one phone manufacturer who may sometimes send a 
404 as well, I am being liberal and saying that any 4XX response
to a BYE should result in a terminated dialog.


(closes issue #12994)
Reported by: pabelanger
Patches:
      12994.patch uploaded by putnopvut (license 60)

Closes AST-129



git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.4@158071 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 14 insertions, 0 deletions

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index a9422d081..0afe2d596 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -12869,6 +12869,20 @@ static void handle_response(struct sip_pvt *p, int resp, char *rest, struct sip_
 		gettag(req, "To", tag, sizeof(tag));
 		ast_string_field_set(p, theirtag, tag);
 	}
+
+	/* RFC 3261 Section 15 specifies that if we receive a 408 or 481
+	 * in response to a BYE, then we should end the current dialog
+	 * and session. There is no mention in the spec of other 4XX responses,
+	 * but it is known that at least one phone manufacturer potentially
+	 * will send a 404 in response to a BYE, so we'll be liberal in what
+	 * we accept and end the dialog and session if we receive any 4XX 
+	 * response to a BYE.
+	 */
+	if (resp >= 400 && resp < 500 && sipmethod == SIP_BYE) {
+		ast_set_flag(&p->flags[0], SIP_NEEDDESTROY);
+		return;
+	}
+
 	if (p->relatedpeer && p->method == SIP_OPTIONS) {
 		/* We don't really care what the response is, just that it replied back. 
 		   Well, as long as it's not a 100 response...  since we might