here in my office i've got the problem with sipxtapi that the firewall was removing the nat port mapping after around 30 seconds - and sipxtapi didn't sended a keepalive message. So after about 30 seconds my sip client got marked unreachable by the sip server - because of the missing port mapping...

So i took a look into the code - and foudn the the sipUdpServer do support Sip Pings (OPTIONS or PING) - but this feature is not enabled (i don't know why).

So i now fixed some minor problem with this function - and did enabled the Sip Ping feature so that it can get used within a sipxtapi call.

Attached is a zip file with two patches for sipXtackLib and sipXcallLib with the necessary changes.

Also included are some other minor fixes - and changes i have done - you can find them also as issues here.

Btw. Someone mentioned that i will need a disclaimer so that patches can find their way into the lib - where can i fill out the disclaimer ?