[OpenSIPS-Users] Double SDP

[Dragomir Haralambiev]

Hello,

I try setup Opensips to make local calls using device with encryption.

In this example, it is not known UA 2 whether it supported (RTP/SAVP).
UA 1 (RTP/AVP) ----> Opensips+Rtpengine -----> UA 2

1. I try to make call with:
rtpengine_offer("RTP/AVP replace-session-connection replace-origin
ICE=remove");

2. If UA 2 is not supported RTP/AVP (use encryption always) return 488 (Not
Acceptable Media).

failure_route[local] {

  if (t_check_status("488")) {
     rtpengine_delete();
     rtpengine_offer("RTP/SAVP replace-session-connection replace-origin
ICE=remove");
     t_on_failure("local");
    t_relay();
    exit;
   };
}
This is  INVITE from Opensips to UA 2.
The Session Description Protocol contains two parts. One with RTP/AVP and
the other with RTP/SAVP.
Is this correct?

INVITE
.........................................
v=0
o=- 13211994121466145 1 IN IP4 84.21.15.45
s=X-Lite release 5.6.1 stamp 99142
c=IN IP4 84.21.15.45
t=0 0
m=audio 51334 RTP/AVP 8 0 101
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=rtcp:51335
v=0
o=- 13211994121466145 1 IN IP4 84.21.15.45
s=X-Lite release 5.6.1 stamp 99142
c=IN IP4 84.21.15.45
t=0 0
m=audio 51334 RTP/SAVP 8 0 101
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=rtcp:51335
a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:BQZW8OxjNdLM/Py8clP7nGLRPUXSDNTIhGS84YoN
a=crypto:2 AES_CM_128_HMAC_SHA1_32
inline:eC/i/z6ll3sZL/rhqfFcqK+q/atpInrBV+WBl921
a=crypto:3 AES_192_CM_HMAC_SHA1_80
inline:1Zz46W/M4YkZOWSebTcZwlZspR7t3n5e0NLx36DLREpyrFzYj7I
a=crypto:4 AES_192_CM_HMAC_SHA1_32
inline:43+DC+ZYBHrRWweVfJjP/U/3PFxd0QIyi5XHq7Oq8nnKS2w9lpQ
a=crypto:5 AES_256_CM_HMAC_SHA1_80
inline:HVjfOVa4qezhGqdKYOxD3KiZFllBUA6G7NCnnESuYHoy8Ha+pTQi57H0knlobg
a=crypto:6 AES_256_CM_HMAC_SHA1_32
inline:YbVeh5vrcQbMPKY9g13QCEBD7KZsin2wXWjQA+mEKfL0T8uMKE0+Dn2comPzmA
a=crypto:7 F8_128_HMAC_SHA1_80
inline:lLQrgIsJWoTb37NCXKJrB88aSBX3/ETWFyPSnOu1
a=crypto:8 F8_128_HMAC_SHA1_32
inline:+LuITZ9LDvcQUv2O7t9FBztNUOkHhgpmj91w2c6w
a=crypto:9 NULL_HMAC_SHA1_80 inline:y+3sqIOeZXDPG0mhYsz234s7Jrq3EOblQWT5bc0w
a=crypto:10 NULL_HMAC_SHA1_32
inline:6oMnVQvKFtJeQnHyyCY6ECDLwIjgn3kGyxYPm+nT
a=setup:actpass
a=fingerprint:sha-1
A2:EF:11:86:E9:68:C9:8F:D6:86:33:07:BF:D1:6C:DD:6B:D8:FB:C3



The problem is that I get a one-way voice.

Best regards,
Dragomir
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