6 Feb
2014
6 Feb
'14
3:43 p.m.
Hey,
What mediaproxy-ng can do (which other RTP proxies don't do) is
translate RTP/AVP (from regular SIP endpoints) to and from RTP/SAVPF
(encrypted RTP from WebRTC), which is what people usually use it for.
Assuming that ICE does its job correctly, two WebRTC endpoints should be
able to communicate directly with each other (without RTP proxy), even
if a firewall is involved. But I understand that in some cases even ICE
might fail.
There's two things I see wrong with the resulting SDP body, both related
to the last stable version of MP-NG not supporting BUNDLE. If you could
try adding an SDP rewrite rule to your kamailio config to remove the
a=group:... line. If that doesn't work, also try disabling video when
making the call.
Alternatively, you can try building MP-NG from this branch:
https://github.com/sipwise/mediaproxy-ng/tree/rfuchs/3.0
This is currently under heavy development, but it should support BUNDLE
just enough to make this work.
cheers
On 02/05/14 11:23, Mihai Marin wrote:
Hello,
I'm trying the simplest case first. I don't understand why you are
saying that most of the people don't use mediaproxy-ng
for WebRTC to WebRTC calls. If my firewall is a restrictive one I need
to use turn server and mediaproxy-ng can do turn too? Probably I'm not
seeing the big picture.
Regarding the problem with Incompatible SDP I have attached the SDP
before mp-ng and after:
BEFORE mediaproxy-ng magic:
14(21473) DEBUG: websocket [ws_frame.c:650]: ws_frame_receive(): Rx SIP
message:
INVITE sip:bob@93.187.138.214 <mailto:sip%3Abob@93.187.138.214> SIP/2.0
Via: SIP/2.0/WS an6ikqlgivd7.invalid;branch=z9hG4bK5845620
Max-Forwards: 69
To: <sip:bob@93.187.138.214 <mailto:sip%3Abob@93.187.138.214>>
From: "Alice Test" <sip:alice@93.187.138.214
<mailto:sip%3Aalice@93.187.138.214>>;tag=dt8iuu64l9
Call-ID: bmaapitncfv1jnijrbcf
CSeq: 7318 INVITE
Contact: <sip:sbt6u2o1@an6ikqlgivd7.invalid;transport=ws;ob>
Allow: ACK,CANCEL,BYE,OPTIONS,INVITE
Content-Type: application/sdp
Supported: path, outbound, gruu
User-Agent: JsSIP 0.3.0
Content-Length: 2967
v=0
o=- 1167703101330838157 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE audio video
a=msid-semantic: WMS 3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
m=audio 9496 RTP/SAVPF 111 103 0 8 106 105 13 126
c=IN IP4 213.233.85.51
a=rtcp:9496 IN IP4 213.233.85.51
a=candidate:3511930567 1 udp 2113937151 10.93.108.223 53310 typ host
generation 0
a=candidate:3511930567 2 udp 2113937151 10.93.108.223 53310 typ host
generation 0
a=candidate:2681221687 1 tcp 1509957375 10.93.108.223 0 typ host
generation 0
a=candidate:2681221687 2 tcp 1509957375 10.93.108.223 0 typ host
generation 0
a=candidate:1343998067 1 udp 1845501695 213.233.85.51 9496 typ srflx
raddr 10.93.108.223 rport 53310 generation 0
a=candidate:1343998067 2 udp 1845501695 213.233.85.51 9496 typ srflx
raddr 10.93.108.223 rport 53310 generation 0
a=ice-ufrag:gNml+vA5NqfaRg0w
a=ice-pwd:dQJW2XWJ+g6gTIujfT819g2d
a=ice-options:google-ice
a=mid:audio
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=sendrecv
a=rtcp-mux
a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:uWFSQ5+41i2e12WFnGJKCfe+kuudHy0NurAaT8or
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10
a=rtpmap:103 ISAC/16000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:106 CN/32000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:126 telephone-event/8000
a=maxptime:60
a=ssrc:231261060 cname:aZBL5jB9VQtchKUh
a=ssrc:231261060 msid:3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
e8c9eb9c-916e-4c30-884f-fd602b2d8c90
a=ssrc:231261060 mslabel:3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
a=ssrc:231261060 label:e8c9eb9c-916e-4c30-884f-fd602b2d8c90
m=video 9496 RTP/SAVPF 100 116 117
c=IN IP4 213.233.85.51
a=rtcp:9496 IN IP4 213.233.85.51
a=candidate:3511930567 1 udp 2113937151 10.93.108.223 53310 typ host
generation 0
a=candidate:3511930567 2 udp 2113937151 10.93.108.223 53310 typ host
generation 0
a=candidate:2681221687 1 tcp 1509957375 10.93.108.223 0 typ host
generation 0
a=candidate:2681221687 2 tcp 1509957375 10.93.108.223 0 typ host
generation 0
a=candidate:1343998067 1 udp 1845501695 213.233.85.51 9496 typ srflx
raddr 10.93.108.223 rport 53310 generation 0
a=candidate:1343998067 2 udp 1845501695 213.233.85.51 9496 typ srflx
raddr 10.93.108.223 rport 53310 generation 0
a=ice-ufrag:gNml+vA5NqfaRg0w
a=ice-pwd:dQJW2XWJ+g6gTIujfT819g2d
a=ice-options:google-ice
a=mid:video
a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
a=sendrecv
a=rtcp-mux
a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:uWFSQ5+41i2e12WFnGJKCfe+kuudHy0NurAaT8or
a=rtpmap:100 VP8/90000
a=rtcp-fb:100 ccm fir
a=rtcp-fb:100 nack
a=rtcp-fb:100 goog-remb
a=rtpmap:116 red/90000
a=rtpmap:117 ulpfec/90000
a=ssrc:3207772497 cname:aZBL5jB9VQtchKUh
a=ssrc:3207772497 msid:3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
ec757148-040c-479f-adbe-f6bac271fbd6
a=ssrc:3207772497 mslabel:3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
a=ssrc:3207772497 label:ec757148-040c-479f-adbe-f6bac271fbd6
AFTER mediaproxy-ng magic:
14(21473) DEBUG: rtpproxy-ng [rtpproxy.c:1333]: rtpp_function_call():
proxy reply: d3:sdp3046:
v=0
o=- 1167703101330838157 2 IN IP4 93.187.138.214
s=-
t=0 0
a=group:BUNDLE audio video
a=msid-semantic: WMS 3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
m=audio 30408 RTP/SAVPF 111 103 0 8 106 105 13 126
c=IN IP4 93.187.138.214
a=candidate:3511930567 1 udp 2113937151 10.93.108.223 53310 typ host
generation 0
a=candidate:3511930567 2 udp 2113937151 10.93.108.223 53310 typ host
generation 0
a=candidate:2681221687 1 tcp 1509957375 10.93.108.223 0 typ host
generation 0
a=candidate:2681221687 2 tcp 1509957375 10.93.108.223 0 typ host
generation 0
a=candidate:1343998067 1 udp 1845501695 213.233.85.51 9496 typ srflx
raddr 10.93.108.223 rport 53310 generation 0
a=candidate:1343998067 2 udp 1845501695 213.233.85.51 9496 typ srflx
raddr 10.93.108.223 rport 53310 generation 0
a=ice-ufrag:gNml+vA5NqfaRg0w
a=ice-pwd:dQJW2XWJ+g6gTIujfT819g2d
a=ice-options:google-ice
a=mid:audio
a=sendrecv
a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:uWFSQ5+41i2e12WFnGJKCfe+kuudHy0NurAaT8or
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10
a=rtpmap:103 ISAC/16000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:106 CN/32000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:126 telephone-event/8000
a=maxptime:60
a=ssrc:231261060 cname:aZBL5jB9VQtchKUh
a=ssrc:231261060 msid:3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
e8c9eb9c-916e-4c30-884f-fd602b2d8c90
a=ssrc:231261060 mslabel:3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
a=ssrc:231261060 label:e8c9eb9c-916e-4c30-884f-fd602b2d8c90
a=rtcp:30409
a=candidate:8JGnwCAu0icAoJnr 1 UDP 2130706432 93.187.138.214 30408 typ host
a=candidate:8JGnwCAu0icAoJnr 2 UDP 2130706431 93.187.138.214 30409 typ host
m=video 30408 RTP/SAVPF 100 116 117
c=IN IP4 93.187.138.214
a=candidate:3511930567 1 udp 2113937151 10.93.108.223 53310 typ host
generation 0
a=candidate:3511930567 2 udp 2113937151 10.93.108.223 53310 typ host
generation 0
a=candidate:2681221687 1 tcp 1509957375 10.93.108.223 0 typ host
generation 0
a=candidate:2681221687 2 tcp 1509957375 10.93.108.223 0 typ host
generation 0
a=candidate:1343998067 1 udp 1845501695 213.233.85.51 9496 typ srflx
raddr 10.93.108.223 rport 53310 generation 0
a=candidate:1343998067 2 udp 1845501695 213.233.85.51 9496 typ srflx
raddr 10.93.108.223 rport 53310 generation 0
a=ice-ufrag:gNml+vA5NqfaRg0w
a=ice-pwd:dQJW2XWJ+g6gTIujfT819g2d
a=ice-options:google-ice
a=mid:video
a=sendrecv
a=crypto:1 AES_CM_128_HMAC_SHA1_80
inline:uWFSQ5+41i2e12WFnGJKCfe+kuudHy0NurAaT8or
a=rtpmap:100 VP8/90000
a=rtcp-fb:100 ccm fir
a=rtcp-fb:100 nack
a=rtcp-fb:100 goog-remb
a=rtpmap:116 red/90000
a=rtpmap:117 ulpfec/90000
a=ssrc:3207772497 cname:aZBL5jB9VQtchKUh
a=ssrc:3207772497 msid:3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
ec757148-040c-479f-adbe-f6bac271fbd6
a=ssrc:3207772497 mslabel:3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
a=ssrc:3207772497 label:ec757148-040c-479f-adbe-f6bac271fbd6
a=rtcp:30409
a=candidate:8JGnwCAu0icAoJnr 1 UDP 2130706432 93.187.138.214 30408 typ host
a=candidate:8JGnwCAu0icAoJnr 2 UDP 2130706431 93.187.138.214 30409 typ host
Between them, I have some strange logs in kamailio:
14(21473) ERROR: *** cfgtrace:
c=[/usr/local/etc/kamailio/kamailio-test-media.cfg] l=878 a=25
n=rtpproxy_manage
14(21473) DEBUG: <core> [parser/sdp/sdp_helpr_funcs.c:565]:
extract_mediaip(): located IP address [127.0.0.1] in `o=' field
14(21473) DEBUG: <core> [parser/sdp/sdp_helpr_funcs.c:565]:
extract_mediaip(): located IP address [213.233.85.51] in `c=' field
14(21473) DEBUG: <core> [parser/sdp/sdp.c:574]: parse_sdp_session():
ignoring unknown type in a= line: `a=ice-ufrag:gNml+vA5NqfaRg0w
a=ice-pwd:dQJW2XWJ+g6gTIujfT819g2d
a=ice-options:google-ice
a=mid:audio
...............................................................
14(21473) DEBUG: <core> [parser/sdp/sdp.c:574]: parse_sdp_session():
ignoring unknown type in a= line: `a=ssrc:3207772497
label:ec757148-040c-479f-adbe-f6bac271fbd6
'
14(21473) DEBUG: rtpproxy-ng [rtpproxy_funcs.c:148]:
check_content_type(): type <application/sdp> found valid
14(21473) DEBUG: rtpproxy-ng [rtpproxy.c:1333]: rtpp_function_call():
proxy reply: d3:sdp3046:v=0
o=- 1167703101330838157 2 IN IP4 93.187.138.214
s=-
t=0 0
a=group:BUNDLE audio video
a=msid-semantic: WMS 3G8DreUBMks5DpcqNiiE5jXIC4GzIwfd7CUv
Thank you very much for your help and for spending time debugging this
error.
Best regards,
Mihai M
On Wed, Feb 5, 2014 at 5:41 PM, Richard Fuchs <rfuchs(a)sipwise.com
<mailto:rfuchs@sipwise.com>> wrote:
Hey,
If you're trying to connect two WebRTC endpoints with each, you don't
need any of mediaproxy-ng's magic to get it working. All the previous
replies were assuming that you were trying to connect a WebRTC endpoint
with a non-WebRTC one, which is usually what people are trying to do.
In your case, the flags "froc" in either direction should be sufficient
to get the job done. If it still doesn't work, can you please post the
rejected SDP body as it appears both on the sender's side and on the
receiver's side (i.e. both before and after it went through MP-NG).
cheers
On 02/05/14 05:17, Mihai Marin wrote:
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
Hello,
Thank you for your detailed explication but I miss some information or
I'm unable to understand it properly. What I'm trying to do is to use
mediaproxy-ng as a turn server between 2 WebRTC endpoints (when at
least
one is behind restrictive firewall). Trying to
replicate what you
explained on my needs I tried:
$avp(rtpproxy_offer_flags) = "froc+SP";
$avp(rtpproxy_answer_flags) = "froc-SP";
But, unfortunately, I have the same error. Sorry if the solution is
obvious but I can't find it.
Thank you.
Best regards,
Mihai M
On Tue, Feb 4, 2014 at 10:45 PM, Muhammad Shahzad
<shaheryarkh(a)gmail.com
<mailto:shaheryarkh@gmail.com>
<mailto:shaheryarkh@gmail.com
<mailto:shaheryarkh@gmail.com>>> wrote:
There are several problems that need to be addressed in your
kamailio.cfg but let me try to focus only on mediaprxoy-ng
related ones.
First instead of engaging mediaproxy in failure route, engage it
main route or branch route. Why wait for failure when we know call
will fail anyway if you try to call webrtc to sip or vice versa.
Secondly you need to keep track of connection type of both caller
and callee and set appropriate mediaproxy-ng flags according
to call
direction, e.g. call from webrtc to sip, or
sip to webrtc or
webrtc
to webrtc or sip to sip, each type of call
needs different set of
flags for both rtpproxy_offer and rtpproxy_answer.
How you do this, is pretty simple, to detect if caller is webrtc
endpoint you can use,
if ($avp(mline) =~ "SAVPF") {
# caller is a webrtc endpoint
};
To check if callee is a webrtc endpoint, you can use,
if ($(ru{uri.param,transport}) =~ "ws") {
# callee is a webrtc endpoint
};
For testing purpose, i recommend you only use mediaproxy-ng for
bridging webrtc to sip or vice versa calls, i.e. if both endpoints
are using same transport (e.g. sip to sip or webrtc to webrtc
calls)
then don't use mediaproxy-ng at all and
allow endpoints to
establish
media directly (that would work out the box
at least for webrtc to
webrtc calls).
Finally use correct flags for each type of call (i recommend doing
it in branch route), for example,
For WebRTC to SIP call use flags (case-sensitive),
$avp(rtpproxy_offer_flags) = "froc-sp";
$avp(rtpproxy_answer_flags) = "froc+SP";
rtpproxy_offer($avp(rtpproxy_offer_flags));
For SIP to WebRTC call use flags (case-sensitive),
$avp(rtpproxy_offer_flags) = "froc+SP";
$avp(rtpproxy_answer_flags) = "froc-sp";
rtpproxy_offer($avp(rtpproxy_offer_flags));
Then in reply route,
rtpproxy_answer($avp(rtpproxy_answer_flags));
Remember, currently mediaproxy-ng does NOT support SRTP/DTLS,
which
is required by firefox, so as result your
webrtc endpoint MUST be
running on Chrome.
Hope this helps.
Thank you.
On Tue, Feb 4, 2014 at 3:28 PM, Mihai Marin
<marinmihai(a)gmail.com
<mailto:marinmihai@gmail.com>
<mailto:marinmihai@gmail.com
<mailto:marinmihai@gmail.com>>>
wrote:
Hello,
Thank you for your support.
Yes, I have the same error without video enabled. I have
attached the logs from jssip (with and without video support)
and logs from kamailio when trying a call with video support
enabled. The kamailio.cfg used is the same from my
previous mail.
I also tried with sipml5 and I have the same behavior.
I'm stuck on this error and I think I'm looking in the wrong
direction.
Thank you.
Best regards,
Mihai M
On Tue, Feb 4, 2014 at 2:49 PM, Andrew Pogrebennyk
<apogrebennyk(a)sipwise.com
<mailto:apogrebennyk@sipwise.com>
<mailto:apogrebennyk@sipwise.com
<mailto:apogrebennyk@sipwise.com>>> wrote:
Hi,
could you please post also your Chrome js developer log?
Does the problem exist if you start the jssip clients
without video support?
Andrew
On 02/03/2014 12:00 PM, Mihai Marin wrote:
<mailto:sr-users@lists.sip-router.org>
Hello,
Another weekend struggling to make a call from jssip to
another jssip
behind firewall and I still receive 488 - Not
Acceptable
Here. I tried
all the ideas that I had/received without any
success -
including catch
488 and re-invite.
[...]
What do I miss from my configuration?
Thank you.
Best regards,
Mihai M
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