[OpenSIPS-Users] forward retransmition of "200 OK" if no ACK

Iñaki Baz Castillo ibc at aliax.net
Wed Jun 30 01:25:44 CEST 2010

2010/6/29 Julien Chavanton <jc at atlastelecom.com>:
> Will opensips forward retransmition of "200 OK" if no ACK is received after
> a while ?
> According to sip_trace only the first "200 OK" is forwarded

Do a flow capture using "ngrep -Wbyline -t -q port 5060" (or getting a
pcap file) so you'll get real information about which responses are
being retransmitted.
Also, note that 200 OK is a end-to-end response rather than a
hop-by-hop response (like [3456]XX responses) so the proxy MUST NOT
retransmit it. It's a task of the UAS the retransmission of the 200
until it receives the ACK.

Iñaki Baz Castillo
<ibc at aliax.net>

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