writing SIP using LwIP stack

Hi everybody,

I'm working on a project using LwIP:

i want to develop a sip client that i'm gonna use it to develop a VOIP application.

Please, i need to know, if someone else have worked in the same project.

I need help or guide to know how to develop or to adapt a minimalistic sip client stack to work using the lwIP TCP/IP stack:confused: .