15 Dec
2014
15 Dec
'14
11:25 p.m.
Good evening,
During pre-production testing, we discovered quite odd IPv6 socket
issues. Problems arise when a SIP dialog is initiated from within
Kamailio (e.g. a SIP INVITE message).
Using ngrep, it seems very odd IPv6 sockets are opened, for example:
U 2001:beef:34a:10::234:5060 ->
2001:beef:285:1::3:5060 1573541542@0:1440
U 2001:beef:34a:10::234 -> 2001:beef:285:1::3 +1573541542@1448:17
Obviously the "1573541542@0:1440" part is bogus, I expect output similar to:
U 2001:beef:34a:10::234:5060 ->
2001:beef:285:1::3:5060
INVITE sip:s@[2001:beef:285:1::3]:5060 SIP/2.0.
When I do a REGISTER from UA using IPv6, the dialog (and return packets)
seem completely normal.
Using IPv4, there's no problem at all.
It seems the socket problems are triggered when:
1. Using the topoh module.
2. When altering From: headers e.g. using uac_replace_from().
When topoh is disabled and no headers are altered, IPv6 works as good as
IPv4.
We could reproduce the problem using Kamailio 4.1.4, 4.1.5 and 4.2.0 on
Debian (64-bit).
Please advice what to do.
Thanks in advance!
Best regards,
Kees