Merged revisions 57477 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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r57477 | file | 2007-03-02 12:06:52 -0500 (Fri, 02 Mar 2007) | 10 lines

Merged revisions 57475 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/branches/1.2

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r57475 | file | 2007-03-02 12:02:46 -0500 (Fri, 02 Mar 2007) | 2 lines

If a SIP message comes in and goes to a method handler that requires additional values that may not be present then send back an error.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@57478 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -15324,6 +15324,12 @@ static int handle_request(struct sip_pvt *p, struct sip_request *req, struct soc
 		}
 	}
 
+	if (!e && (p->method == SIP_INVITE || p->method == SIP_SUBSCRIBE || p->method == SIP_REGISTER || p->method == SIP_NOTIFY)) {
+		transmit_response(p, "503 Server error", req);
+		sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
+		return -1;
+	}
+
 	/* Handle various incoming SIP methods in requests */
 	switch (p->method) {
 	case SIP_OPTIONS: