There is an old issue in the OpenSIPS which may result in SDP containing mismatching protocols, when processing rtpproxy_offer() on a IPv6 message with default flags. This has been revealed by the new version of the voiptests

00:00:03.089/GLOBAL/alice_ua: SENDING message to [::1]:5060:
INVITE sip:bob_6@[::1]:5060 SIP/2.0
v: SIP/2.0/UDP [::1]:5061;branch=z9hG4bKfffb7b9e25497c853146ea72a3399f5c;rport
Max-Forwards: 70
f: "Alice Smith" sip:alice_6_ipv6@[::1];tag=628b36c02f1d1d5a7b4305c050a3feb6
t: sip:bob_6@[::1]
i: 759e9723cfa1bc5c9c294b2a6c816e77@184.71.172.86
CSeq: 200 INVITE
m: Anonymous sip:alice_6_ipv6@[::1]:5061
Expires: 300
User-Agent: Sippy
cisco-GUID: 3824430197-1272056386-4229849152-47475815
h323-conf-id: 3824430197-1272056386-4229849152-47475815
c: application/sdp
l: 409

v=0
o=- 986474003697 986474003697 IN IP6 ::1
s=-
c=IN IP6 2001:0:0:0:7c1:0:52b8:0
t=0 0
m=audio 40534 RTP/AVP 18 0 2 4 8 96 97 98 101
a=rtpmap:18 G729a/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:4 G723/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:96 G726-40/8000
a=rtpmap:97 G726-24/8000
a=rtpmap:98 G726-16/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:30
a=sendrecv

00:00:03.090/GLOBAL/bob_ua: RECEIVED message from [::1]:5060:
INVITE sip:bob_6@[::1]:5062 SIP/2.0
Record-Route: sip:[0:0:0:0:0:0:0:1];lr;ftag=628b36c02f1d1d5a7b4305c050a3feb6
Via: SIP/2.0/UDP [0:0:0:0:0:0:0:1]:5060;branch=z9hG4bKddc6.7a0c3345.0
v: SIP/2.0/UDP [::1]:5061;received=0:0:0:0:0:0:0:1;branch=z9hG4bKfffb7b9e25497c853146ea72a3399f5c;rport=5061
Max-Forwards: 69
f: "Alice Smith" sip:alice_6_ipv6@[::1];tag=628b36c02f1d1d5a7b4305c050a3feb6
t: sip:bob_6@[::1]
i: 759e9723cfa1bc5c9c294b2a6c816e77@184.71.172.86
CSeq: 200 INVITE
m: Anonymous sip:alice_6_ipv6@[::1]:5061
Expires: 300
User-Agent: Sippy
cisco-GUID: 3824430197-1272056386-4229849152-47475815
h323-conf-id: 3824430197-1272056386-4229849152-47475815
c: application/sdp
Content-Length: 419

v=0
o=- 986474003697 986474003697 IN IP6 ::1
s=-
c=IN IP4 0:0:0:0:0:0:0:1
t=0 0
m=audio 12260 RTP/AVP 18 0 2 4 8 96 97 98 101
a=rtpmap:18 G729a/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:4 G723/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:96 G726-40/8000
a=rtpmap:97 G726-24/8000
a=rtpmap:98 G726-16/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:30
a=sendrecv
a=nortpproxy:yes

You can view, comment on, or merge this pull request online at:

  https://github.com/kamailio/kamailio/pull/523

Commit Summary

• Fix IPv6 handling with the default setup. With the current code,

File Changes

• M modules/rtpproxy/rtpproxy.c (74)

Patch Links:

• https://github.com/kamailio/kamailio/pull/523.patch
• https://github.com/kamailio/kamailio/pull/523.diff

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