Hello guys,

I have this setup:

Zoiper-->Kamailio->fs->kamailio->webrtc client(s)

Whenever webrtc clients call each other, calls are ok.

But when the zoiper (regular sip/tcp) calls, the browsers complaint about:

"no ice-ufrag" (firefox) or 

"Failed to set remote offer sdp: Called with SDP without DTLS fingerprint." (Chrome).

I am setting the sdp in freeswitch as:

      <action application="set" data="proxy_media=false"/>

      <action application="set" data="bypass_media=false"/>

      <action application="export" data="zrtp_secure_media=false"/>

      <action application="export" data="nolocal:rtp_secure_media=true"/>

and the actual sdp is:

v=0

o=FreeSWITCH 1499354716 1499354717 IN IP4 1.2.3.4

s=FreeSWITCH

c=IN IP4 1.2.3.4

t=0 0

m=audio 40954 RTP/SAVP 8 101 13

a=rtpmap:8 PCMA/8000

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-16

a=rtpmap:13 CN/8000

a=crypto:1 AEAD_AES_256_GCM_8 inline:9XidL0Z5VYb0L5CegRZaYVrVfjA0ImWgu5WyLK0vtg60RTk6Koe8c0sRkjU

a=crypto:2 AEAD_AES_128_GCM_8 inline:fLKE1lxhRoVw+D5NVoKFFw06I0Xok/9KbRystQ

a=crypto:3 AES_CM_256_HMAC_SHA1_80 inline:w/yDN+ETPuCOiOIxjFLRjbFbDxp2xaxhXz4QVwBXWxJw/GigOURGw8EMv9fVUg

a=crypto:4 AES_CM_192_HMAC_SHA1_80 inline:evU8MzAtiSHwKb95s4V9IAMpmok06kW9ZGDgH3/Lc3ZytVn2SR4

a=crypto:5 AES_CM_128_HMAC_SHA1_80 inline:KKDkT0DssohSeKFsX6tbixRhwYdiIhE6r3u5CCVA

a=crypto:6 AES_CM_256_HMAC_SHA1_32 inline:D3JgGuOlIxXfHGdqf7lKWqNDAIiJrbOqOKb+erlhPQtBKF4wzomjbN0sBIiE4w

a=crypto:7 AES_CM_192_HMAC_SHA1_32 inline:c12ebWWzZ1cqZN0v5C5uYzdvtfnw6AARU3+jGA0WzTSDlDd20vI

a=crypto:8 AES_CM_128_HMAC_SHA1_32 inline:nPZku7S6hlz2OPAff8T9I8sNFzuZziNg64KuvfNS

a=crypto:9 AES_CM_128_NULL_AUTH inline:9MNdj7xaingoGY14NUg8iS3dhTqD0XW8FAOLNtmP

a=ptime:20

a=nortpproxy:yes

I'm pretty new to the webrtc stuff, so any help is greatly appreciated!

Thanks!

David Villasmil

email: david.villasmil.work@gmail.com

phone: +34669448337

ᐧ