[SR-Users] Issues with Yealink SDP and sdp_with_transport()

[Alberto Sagredo]

Im using if(sdp_with_transport("RTP/SAVP")) to detect with endpoint is send
SAVP or not to divert to and rtp proxy or rtpengine, as you know rtpproxy
supports recording and rtpengine does not yet.

So when using  if(sdp_with_transport("RTP/SAVP")) with Grandstream Phones
all worked fine, but when configuring Optional or Compulsory SRTP in
Yealink it seems to do not detect


i have seen that crypto lines are not in the final SDP but do not know if
thats the reason

Did you have a similar issue with Yealink?

If i could get traces in anyway to help let me know.


BR


Alberto


INVITE sip:212 at 10.0.1.34:15060 SIP/2.0.

Record-Route: <sip:x.x.x.x:8002;r2=on;lr=on;ftag=1072578853;nat=yes>.

Record-Route:
<sip:x.x.x.x:8001;transport=tls;r2=on;lr=on;ftag=1072578853;nat=yes>.

Via: SIP/2.0/UDP
x.x.x.x.:8002;branch=z9hG4bK24c2.948e5074172530002b3bfb131ba51de6.0;i=1.

Via: SIP/2.0/TLS 10.0.1.111:11891
;received=83.x.x.x;rport=11891;branch=z9hG4bK456460360.

From: "214" <sip:214 at 1x.x.x.x:8001>;tag=1072578853.

To: <sip:212 at x.x.x.x:8001>.

Call-ID: 0_1310998066 at 10.0.1.111.

CSeq: 2 INVITE.

Contact: <sip:214 at 83.x.x.x:11891;transport=TLS>.

Content-Type: application/sdp.

Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, REGISTER,
SUBSCRIBE, REFER, PUBLISH, UPDATE, MESSAGE.

Max-Forwards: 69.

User-Agent: Yealink SIP-T21P_E2 52.80.0.3.

Allow-Events: talk,hold,conference,refer,check-sync.

Content-Length:   553.

.

v=0.

o=- 20143 20143 IN IP4 x.x.x.x.

s=SDP data.

c=IN IP4 x.x.x.x

t=0 0.

m=audio 8530 RTP/AVP 0 8 18 101.

a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:N2RjYzlhMjNmMzAwMDU5YzU2YjQ4ZTU1ODE4MzNm.

a=crypto:2 AES_CM_128_HMAC_SHA1_32
inline:NWQwYzgzMzhlYmU1OGY2NThmMzk2NjYwMTllZWI3.

a=crypto:3 F8_128_HMAC_SHA1_80
inline:YjEyN2M5Nzk4YzRmZDQ5ZTYxZGUzNTI3Yzg1YTgw.

a=rtpmap:0 PCMU/8000.

a=rtpmap:8 PCMA/8000.

a=rtpmap:18 G729/8000.

a=fmtp:18 annexb=no.

a=rtpmap:101 telephone-event/8000.

a=fmtp:101 0-15.

a=ptime:20.

a=sendrecv.

a=nortpproxy:yes
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