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Re: TCP/TLS support in current (>5.0) eXosip releases

From: David Sugar
Subject: Re: TCP/TLS support in current (>5.0) eXosip releases
Date: Wed, 23 Feb 2022 09:27:46 -0500
User-agent: Evolution 3.36.5-0ubuntu1

I think I figured it out.  TCP mode is only usable in client mode currently. I was expecting to see a bound tcp listener because I used eXosip_listen_addr(), but apparently that is not true anymore.

SipWitchQt actually had a hard requirement for a bound TCP listener, but I already vendor eXosip2 in it, so I can have that locally build with ENABLE_MAIN_SOCKET. Most of my more recent stuff actually does not, so until I noticed there was no bound socket, I did not even realize this change :). For example, in coventry, I want to do upstream/trunking as sip tcp, but even there I only look like a client registering to an upstream provider.

On Wed, 2022-02-23 at 08:48 -0500, David Sugar wrote:
There is a define now in the eXosip2 sources, "ENABLE_MAIN_SOCKET".  There did not seem to be any configure option for doing this at build time.  It also appears that support for TCP/TLS sip is effectively dead thru eXosip_listen_addr as the socket is never bound nor listen() called unless this is set.  This define also touches epoll behavior a small bit in eXtl_udp.c.

Is this safe to enable/inject at build time?  How else would one even get a working tcp sip service again without it? Should this be a configure option? I know I used to be able to use tcp with eXosip2 in earlier (?4.0?) releases and it worked back then, with some interesting limitations related to connection reuse.

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