Alexey Rybalko writes:
There is no such attribute in SDP payload from the latest Mozilla (v.29).
v=0 o=Mozilla-SIPUA-29.0 371 0 IN IP4 0.0.0.0 s=SIP Call t=0 0 a=ice-ufrag:083b4837 a=ice-pwd:dac461d48770be5e1dae6c450e144bf3 a=fingerprint:sha-256 C3:AA:DB:75:D7:60:FC:B6:94:A7:81:4F:74:A2:FF:44:4B:17:AE:D3:64:37:37:D1:AC:1A:F5:D4:86:1E:4F:7A m=audio 52775 RTP/SAVPF 109 0 8 101 c=IN IP4 192.168.0.101 a=rtpmap:109 opus/48000/2 a=ptime:20 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=sendrecv a=setup:actpass a=candidate:0 1 UDP 2130444543 192.168.0.101 52775 typ host a=candidate:0 2 UDP 2130444542 192.168.0.101 63139 typ host a=rtcp-mux
there *is* a=setup:actpass in above.
-- juha
Can you check if the original offer contains an "a=setup:actpass" attribute? I remember Firefox having a problem with this in some version. This attribute is required for DTLS-SRTP and Firefox was not sending it. It's fixed in later versions.