[SR-Users] Broken Via/reply-matching for natping OPTION

[Andreas Granig]

Hi,

When kamailio-3.1 sends OPTIONS for natping, the Via branch is wrong, e.g:

OPTIONS sip:192.168.51.1:5060 SIP/2.0.
Via: SIP/2.0/UDP 127.0.0.1:5062;branch=0.
Route: <something>

Should be branch=z9hG4bK<something> instead of branch=0, right? When a
reply comes back, like this...

SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 127.0.0.1:5062;branch=0;rport=5062.
From: sip:pinger@<something>

... then kamailio logs this:

INFO: <core> [forward.c:786]: broken reply to forward - no 2nd via

The full debug log looks like this:

DEBUG: <core> [parser_helpers.c:196]: path for branch:
'<sip:lb at 127.0.0.1:5060;lr;received=sip:192.168.51.1:5060>'
DEBUG: <core> [parser/msg_parser.c:640]: SIP Reply  (status):
DEBUG: <core> [parser/msg_parser.c:642]:  version: <SIP/2.0>
DEBUG: <core> [parser/msg_parser.c:644]:  status:  <100>
DEBUG: <core> [parser/msg_parser.c:646]:  reason:  <Trying>
DEBUG: <core> [parser/parse_via.c:1287]: Found param type 232, <branch>
= <0>; state=6
DEBUG: <core> [parser/parse_via.c:1287]: Found param type 235, <rport> =
<5062>; state=16
DEBUG: <core> [parser/parse_via.c:2300]: end of header reached, state=5
DEBUG: <core> [parser/msg_parser.c:515]: parse_headers: Via found, flags=2
DEBUG: <core> [parser/msg_parser.c:517]: parse_headers: this is the
first via
DEBUG: <core> [receive.c:145]: After parse_msg...
DEBUG: tm [t_lookup.c:1081]: DEBUG: t_check_msg: msg id=1 global id=0 T
start=0xffffffffffffffff
DEBUG: <core> [parser/parse_to.c:803]: end of header reached, state=9
DEBUG: <core> [parser/msg_parser.c:187]: DEBUG: get_hdr_field: <To>
[23]; uri=[sip:192.168.51.1:5060]
DEBUG: <core> [parser/msg_parser.c:189]: DEBUG: to body
[sip:192.168.51.1:5060#015#012]
DEBUG: <core> [parser/msg_parser.c:167]: get_hdr_field: cseq <CSeq>: <1>
<OPTIONS>
DEBUG: tm [t_lookup.c:1055]: DEBUG: t_reply_matching: failure to match a
transaction
DEBUG: tm [t_lookup.c:1150]: DEBUG: t_check_msg: msg id=1 global id=1 T
end=(nil)
DEBUG: <core> [parser/msg_parser.c:201]: DEBUG: get_hdr_body :
content_length=0
DEBUG: <core> [parser/msg_parser.c:103]: found end of header
INFO: <core> [forward.c:786]: broken reply to forward - no 2nd via
DEBUG: <core> [usr_avp.c:646]: DEBUG:destroy_avp_list: destroying list (nil)

Thanks,
Andreas





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