[SR-Users] random incorrect method parsing

[Vasiliy Ganchev]

Hi Daniel!

Thank you for the suggestion, after the deep investigation, looks like the
root of the problem found:

when device send TCP ACK (before INVITE), in this packet is incapsulated
"VSS-Monitoring ethernet trailer, Source Port: 0", example in file in
attachment. 
Looks like kamailio parse it, and add the received /0 to the beginning of
following SIP request (INVITE), as a result - incorrect Method parsing and
400 error.

The way to solve current problem, is to modify the check below:
--- parser/msg_parser.c	(revision xxxxx)
+++ parser/msg_parser.c	(working copy)
@@ -607,7 +607,7 @@
 	hdr_flags_t flags;

 	/* eat crlf from the beginning */
-	for (tmp=buf; (*tmp=='\n' || *tmp=='\r')&&
+	for (tmp=buf; (*tmp=='\n' || *tmp=='\r' || *tmp=='\0')&&
 			tmp-buf < len ; tmp++);

Do we need such change in kamailio? 

Cheers! issued_packet_with_extra_0.pcap
<http://sip-router.1086192.n5.nabble.com/file/n143771/issued_packet_with_extra_0.pcap>  



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