I am building an RTC iOS app client. I am using the google WebRTC iOS library. However, since WebRTC doesn't implement signalling I am searching for an easy way to implement a SIP stack at the signalling layer. I tried Pjsip but it didn't work: First, I followed this Pjsip guide Integrating Third Party Media Stack into PJSUA-LIB but I didn't know how to proceed, especially that both projects have a big overlap (both implements NAT traversal and SDP). Also, the Pjsip is in C, WebRTC is in Obj-c and the whole app will be in Swift. Second, I created two separate projects, one for Pjsip and one for WebRTC and both ran successfully on iOS. Then I tried to combine the two projects in one as a first step, but it turned out that both projects use libsrtp but different versions of it, the thing which caused conflicts and compiling errors. I am not sure if Pjsip is really what I need, especially that WebRTC already has all the features I need except for SIP signalling. I would be thankful if anyone can guide me to how to proceed with Pjsip or give me another open-source easy to use SIP library. Thanks.

Reputation: 79

Implementing SIP for WebRTC on iOS

I am building an RTC iOS app client. I am using the google WebRTC iOS library. However, since WebRTC doesn't implement signalling I am searching for an easy way to implement a SIP stack at the signalling layer. I tried Pjsip but it didn't work:

First, I followed this Pjsip guide Integrating Third Party Media Stack into PJSUA-LIB but I didn't know how to proceed, especially that both projects have a big overlap (both implements NAT traversal and SDP). Also, the Pjsip is in C, WebRTC is in Obj-c and the whole app will be in Swift.
Second, I created two separate projects, one for Pjsip and one for WebRTC and both ran successfully on iOS. Then I tried to combine the two projects in one as a first step, but it turned out that both projects use libsrtp but different versions of it, the thing which caused conflicts and compiling errors.

I am not sure if Pjsip is really what I need, especially that WebRTC already has all the features I need except for SIP signalling. I would be thankful if anyone can guide me to how to proceed with Pjsip or give me another open-source easy to use SIP library.

Thanks.

Upvotes: 6