[OpenSIPS-Users] strange behavior with TCP reply port

Liviu Chircu liviu at opensips.org
Mon Aug 16 20:06:15 EST 2021

On 11.08.2021 22:01, Jeff Pyle wrote:
> the sl_send_reply() function opens a new TCP socket to the UAC on the 
> IP:port listed in the original message's Contact, rather than sending 
> the 100 on the existing socket (using the ephemeral port)

Hi, Jeff!

Just to frame the problem better: are you sure the reply's target 
IP:port is equal to the request's Contact header and not the topmost Via 
header?  Maybe a /force_rport()/ before calling /sl_send_reply()/ is 
everything that's needed here.  *fingers crossed*


Liviu Chircu
www.twitter.com/liviuchircu | www.opensips-solutions.com
OpenSIPS Summit 2021 Distributed | www.opensips.org/events

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