NoSIP plugin: Fixed SRTP-SDES for "process" request and session update

[ihusejnovic]

Hi,
As I promised in my previous pull request here is the fix for SRTP-SDES in the NoSIP plugin.

Two issues are fixed:

• SRTP-SDES for session update. It's the same fix applied in the SIP plugin.
• "srtp" property was ignored for "process" requests. For example, if you send a "process" request with "srtp" set to “sdes_mandatory” and SDP that doesn’t contain any crypto attributes, although it should fail, it would be processed.

Also, I updated the demo page for NoSIP plugin for easier testing session update and SRTP-SDES.

p.s. I hope I will not promise a new fix in this pull request :)

[lminiero]

Thanks a lot, this is really appreciated! I'll try to test this later today but from a quick glance this looks great, and much more work than I expected it to be.

p.s. I hope I will not promise a new fix in this pull request :)

Hahaha, hope you didn't really feel compelled to do it! You're doing a lot for the project, and your contributions are always appreciated 🙂

[lminiero]

Looks good! I was a bit confused during the demo at first, because disabling video only hid the local one but not the remote one: then I remembered how I wrote my own demo, and that the remove video is actually coming from the callee, that is indeed still sending video... I verified through webrtc-internals that renegotiation seems to be happening correctly ✌️

Merging 👍