Add check_via calls to more request handlers

INFO, NOTIFY, OPTIONS, REFER, and MESSAGE requests
were not checking the topmost Via to determine where
to send the response. Adding check_via calls to those
request handlers solves this.

(closes issue #13071)
Reported by: baron
Patches:
      check_via.patch uploaded by baron (license 531)
Tested by: baron


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@168128 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -11332,6 +11332,7 @@ static void handle_request_info(struct sip_pvt *p, struct sip_request *req)
 	unsigned int event;
 	const char *c = get_header(req, "Content-Type");
 
+	check_via(p, req);
 	/* Need to check the media/type */
 	if (!strcasecmp(c, "application/dtmf-relay") ||
 	    !strcasecmp(c, "application/vnd.nortelnetworks.digits")) {
@@ -13580,6 +13581,7 @@ static int handle_request_notify(struct sip_pvt *p, struct sip_request *req, str
 	char *eventid = NULL;
 	char *sep;
 
+	check_via(p, req);
 	if( (sep = strchr(event, ';')) ) {	/* XXX bug here - overwriting string ? */
 		*sep++ = '\0';
 		eventid = sep;
@@ -13707,7 +13709,7 @@ static int handle_request_options(struct sip_pvt *p, struct sip_request *req)
 {
 	int res;
 
-
+	check_via(p, req);
 	/* XXX Should we authenticate OPTIONS? XXX */
 
 	if (p->lastinvite) {
@@ -14903,6 +14905,7 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
 
 	int res = 0;
 
+	check_via(p, req);
 	if (ast_test_flag(req, SIP_PKT_DEBUG))
 		ast_verbose("Call %s got a SIP call transfer from %s: (REFER)!\n", p->callid, ast_test_flag(&p->flags[0], SIP_OUTGOING) ? "callee" : "caller");
 
@@ -15353,6 +15356,7 @@ static int handle_request_bye(struct sip_pvt *p, struct sip_request *req)
 static int handle_request_message(struct sip_pvt *p, struct sip_request *req)
 {
 	if (!ast_test_flag(req, SIP_PKT_IGNORE)) {
+		check_via(p, req);
 		if (ast_test_flag(req, SIP_PKT_DEBUG))
 			ast_verbose("Receiving message!\n");
 		receive_message(p, req);