Hello,

I noticed that when i do calls behind NAT i'm getting this error when i call fix_nated_sdp() :

"nathelper [nathelper.c:1659]: replace_sdp_ip(): can't extract 'a=rtcp' IP from the SDP"

As far as i can see, all the ips on SDP are correctly replaced to a public IP, so i don't understand the origin of this error.

This is the SDP received by Kamailio :

Session Description Protocol

Session Description Protocol Version (v): 0

Owner/Creator, Session Id (o): - 3421914885 1 IN IP4 192.168.24.89

Session Name (s): SIPPER for PhonerLite

Connection Information (c): IN IP4 192.168.24.89

Time Description, active time (t): 0 0

Media Description, name and address (m): audio 5062 RTP/AVP 107 8 0 2 3 97 110 111 9 18 11 118 101

Media Attribute (a): rtpmap:107 opus/48000/2

Media Attribute (a): rtpmap:8 PCMA/8000

Media Attribute (a): rtpmap:0 PCMU/8000

Media Attribute (a): rtpmap:2 G726-32/8000

Media Attribute (a): rtpmap:3 GSM/8000

Media Attribute (a): rtpmap:97 iLBC/8000

Media Attribute (a): rtpmap:110 speex/8000

Media Attribute (a): rtpmap:111 speex/16000

Media Attribute (a): rtpmap:9 G722/8000

Media Attribute (a): rtpmap:18 G729/8000

Media Attribute (a): fmtp:18 annexb=yes

Media Attribute (a): rtpmap:11 L16/44100

Media Attribute (a): rtpmap:118 L16/16000

Media Attribute (a): rtpmap:101 telephone-event/8000

Media Attribute (a): fmtp:101 0-16

Media Attribute (a): ssrc:2716178988

Media Attribute (a): sendrecv

And this is the SDP sent by Kamailio after NAT being treated :