[SR-Users] force_rtp_proxy/rtpproxy_offer/answer not replacing ip addr.

Wed Jul 6 10:16:42 CEST 2011

Hi,

Note:
The methods of rtpproxy-module will only replace the IP, if the
Kamailio can access the RTPProxy.

How is your RTPProxy connected to your Kamailio? Socket or TCP? Do you
have the Kamailio FIFO enabeld?
If you have the fifo enabled, you should check the following:

kamctl fifo nh_show_rtpp

You should see, that the Kamailio is connected to the RTPProxy. If no,
then that is your problem.
If the RTPProxy is connected and is listening on the TCP socket, then
you can do an ngrep to see the communication between Kamailio and
RTPProxy, which might help you further with your investigation.

Carsten

2011/7/6 MingHon <gminghon at gmail.com>:
> Hi Carsten,
> no is not about just rewriting the SDP.
> i need my UACs media to relay on my rtpproxy
> currently my UACs are sending the media to a private ip.
> my rtpproxy is in behind nat and UACs behind another nat.
>
> On Wed, Jul 6, 2011 at 3:15 PM, Carsten Bock <carsten at ng-voice.com> wrote:
>>
>> Hi MingHon,
>>
>> what do you want to achieve? If it is only about rewritibng the SDP,
>> then this will help you:
>>
>> fix_nated_sdp("10", "<your-ip-here>");
>> => 0x02 rewrite media IP address (c=) with the provided IP address
>> => 0x08 rewrite IP from origin description (o=) with the provided IP
>> address
>>
>> Kind regards,
>> Carsten
>>
>> 2011/7/6 MingHon <gminghon at gmail.com>:
>> > hello List,
>> > anyone could give some hints??
>> > im still unable to rewrite the sdp body.
>> > hope to hear from you all.
>> > thanks
>> > --
>> > Regards,
>> >
>> > MingHon
>> >
>> >
>> > On Tue, Jul 5, 2011 at 3:49 PM, MingHon <gminghon at gmail.com> wrote:
>> >>
>> >> Hi List,
>> >> im facing an issue that my kamailio proxy did not replace the ip
>> >> address
>> >> in the invite and 200OK sdp body.
>> >> my rtpproxy is running: rtpproxy -l 192.168.1.3 -u:*:7722 -u user
>> >> my kamailio is listening on 192.168.1.3, also
>> >> define: advertised_address="175.136.223.112"; & advertised_port=5060;
>> >> and my asterisk is on 192.168.1.23.
>> >> sip signalling and rtp port forwarded to kamailio.
>> >> uacs from another nat register successfully.
>> >> if i put 2 lines of force_rtp_proxy("fcow","175.136.223.112");
>> >> i will get double ip addr in c and o but kamailio ignore my ip addr.
>> >> example i will get
>> >> c=IN IP4 192.168.1.3192.168.1.3
>> >> here is part of my simple script.
>> >> hope you can help.
>> >> thank you very much.
>> >> ---------------cfg-------------------
>> >> route[RTPPROXY] {
>> >> #!ifdef WITH_NAT
>> >> if (is_method("BYE")) {
>> >> unforce_rtp_proxy();
>> >> } else if (is_method("INVITE")){
>> >> force_rtp_proxy("fcow","175.136.223.112");
>> >> #force_rtp_proxy("fcow","175.136.223.112");
>> >> xlog("L_INFO","offer");
>> >> }
>> >> if (!has_totag()) add_rr_param(";nat=yes");
>> >> #!endif
>> >> return;
>> >> }
>> >> --------------------------------------
>> >> and here is the wireshark for uac INVITE and OK.
>> >> -----------INVITE-----------------
>> >> ve0
>> >> EE;p9INVITE sip:102 at 192.168.2.132:5062 SIP/2.0
>> >> Record-Route: <sip:192.168.1.3;lr=on;ftag=as032358a3;nat=yes>
>> >> Via: SIP/2.0/UDP 192.168.1.3;branch=z9hG4bK09d5.c5e9e8d2.0
>> >> Via: SIP/2.0/UDP 192.168.1.23:5080;branch=z9hG4bK71c27189;rport=5080
>> >> Max-Forwards: 69
>> >> From: "101" <sip:102 at aextddns.dyndns.info>;tag=as032358a3
>> >> To: <sip:102 at 192.168.1.3:5060>
>> >> Contact: <sip:102 at 192.168.1.23:5080>
>> >> Call-ID: 416f6e09674ae9671bb7144a1cb11137 at aextddns.dyndns.info
>> >> CSeq: 102 INVITE
>> >> User-Agent: Asterisk PBX 1.6.2.18
>> >> Date: Tue, 05 Jul 2011 07:20:53 GMT
>> >> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>> >> INFO
>> >> Supported: replaces, timer
>> >> Content-Type: application/sdp
>> >> Content-Length: 327
>> >> v=0
>> >> o=root 1639709788 1639709788 IN IP4 192.168.1.3
>> >> s=Asterisk PBX 1.6.2.18
>> >> c=IN IP4 192.168.1.3
>> >> t=0 0
>> >> m=audio 10072 RTP/AVP 0 3 8 101
>> >> a=rtpmap:0 PCMU/8000
>> >> a=rtpmap:3 GSM/8000
>> >> a=rtpmap:8 PCMA/8000
>> >> a=rtpmap:101 telephone-event/8000
>> >> a=fmtp:101 0-16
>> >> a=silenceSupp:off - - - -
>> >> a=ptime:20
>> >> a=sendrecv
>> >> a=nortpproxy:yes
>> >> -----------200OK---------------
>> >> e90
>> >> ElE;pX4tSIP/2.0 200 OK
>> >> Via: SIP/2.0/UDP
>> >>
>> >> 192.168.2.200:5062;rport=2788;received=175.138.21.31;branch=z9hG4bK2086380416
>> >> Record-Route: <sip:192.168.1.3;lr=on;ftag=1796959074;nat=yes>
>> >> From: "101" <sip:101 at aextddns.dyndns.info>;tag=1796959074
>> >> To: <sip:102 at aextddns.dyndns.info>;tag=as2e4c0125
>> >> Call-ID: 1985782590 at 192.168.2.200
>> >> CSeq: 21 INVITE
>> >> Server: Asterisk PBX 1.6.2.18
>> >> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>> >> INFO
>> >> Supported: replaces, timer
>> >> Contact: <sip:102 at 192.168.1.23:5080>
>> >> Content-Type: application/sdp
>> >> Content-Length: 286
>> >> v=0
>> >> o=root 403900934 403900934 IN IP4 192.168.1.23
>> >> s=Asterisk PBX 1.6.2.18
>> >> c=IN IP4 192.168.1.23
>> >> t=0 0
>> >> m=audio 14420 RTP/AVP 0 8 101
>> >> a=rtpmap:0 PCMU/8000
>> >> a=rtpmap:8 PCMA/8000
>> >> a=rtpmap:101 telephone-event/8000
>> >> a=fmtp:101 0-16
>> >> a=silenceSupp:off - - - -
>> >> a=ptime:20
>> >> a=sendrecv
>> >> ------------------------------------
>> >> My kamailio log.
>> >> -----------LOG------------------
>> >> DEBUG: rtpproxy [rtpproxy_funcs.c:148]: type <application/sdp> found
>> >> valid
>> >> DEBUG: rtpproxy [rtpproxy.c:2188]: proxy reply: 10070 192.168.1.3
>> >> INFO: <script>: offer
>> >> -------------------------------------
>> >> double force_rtp_proxy
>> >> --------kamailio -> asterisk [INVITE]---------
>> >> Pyi-}E7V@:#pINVITE sip:102 at aextddns.dyndns.info SIP/2.0
>> >> Record-Route: <sip:192.168.1.3;lr=on;ftag=640933430;nat=yes>
>> >> Via: SIP/2.0/UDP 192.168.1.3;branch=z9hG4bK89a5.53e9f766.0
>> >> Via: SIP/2.0/UDP
>> >>
>> >> 192.168.2.200:5062;rport=2788;received=175.138.21.31;branch=z9hG4bK1673765648
>> >> From: "101" <sip:101 at aextddns.dyndns.info>;tag=640933430
>> >> To: <sip:102 at aextddns.dyndns.info>
>> >> Call-ID: 1909950509 at 192.168.2.200
>> >> CSeq: 21 INVITE
>> >> Contact: <sip:101 at 175.138.21.31:2788>
>> >> Content-Type: application/sdp
>> >> Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY,
>> >> REGISTER,
>> >> SUBSCRIBE, REFER, PUBLISH, UPDATE, MESSAGE
>> >> Max-Forwards: 69
>> >> User-Agent: T20 9.41.0.80
>> >> Allow-Events: talk,hold,conference,refer,check-sync
>> >> Content-Length: 334
>> >> v=0
>> >> o=20073 20073 IN IP4 192.168.1.3192.168.1.3
>> >> s=SDP data
>> >> c=IN IP4 192.168.1.3192.168.1.3
>> >> t=0 0
>> >> m=audio 1006410064 RTP/AVP 0 8 18 9 101
>> >> a=rtpmap:0 PCMU/8000
>> >> a=rtpmap:8 PCMA/8000
>> >> a=rtpmap:18 G729/8000
>> >> a=rtpmap:9 G722/8000
>> >> a=fmtp:101 0-15
>> >> a=rtpmap:101 telephone-event/8000
>> >> a=sendrecv
>> >> a=nortpproxy:yes
>> >> a=nortpproxy:yes
>> >> -----------LOG------------------
>> >> DEBUG: rtpproxy [rtpproxy_funcs.c:148]: type <application/sdp> found
>> >> valid
>> >> DEBUG: rtpproxy [rtpproxy.c:2188]: proxy reply: 10068 192.168.1.3
>> >> DEBUG: rtpproxy [rtpproxy_funcs.c:148]: type <application/sdp> found
>> >> valid
>> >> DEBUG: rtpproxy [rtpproxy.c:2188]: proxy reply: 10068 192.168.1.3
>> >> INFO: <script>: offer
>> >> -----------LOG------------------
>> >>
>> >> --
>> >> Regards,
>> >>
>> >> MingHon
>>
>>
>>
>> --
>> Carsten Bock
>> http://www.ng-voice.com
>> mailto:carsten at ng-voice.com
>>
>> Schomburgstr. 80
>> 22767 Hamburg
>> Germany
>>
>> Mobile +49 179 2021244
>> Office +49 40 34927219
>> Fax +49 40 34927220
>
>
>
> --
> Regards,
>
> MingHon
>

-- 
Carsten Bock
http://www.ng-voice.com
mailto:carsten at ng-voice.com

Schomburgstr. 80
22767 Hamburg
Germany

Mobile +49 179 2021244
Office +49 40 34927219
Fax +49 40 34927220

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