From carlos.ruizdiaz@gmail.com Wed Aug  8 20:53:02 2012
From: Carlos Ruiz =?utf-8?q?D=C3=ADaz?= <carlos.ruizdiaz@gmail.com>
To: sr-dev@lists.kamailio.org
Subject: Re: [sr-dev] Websocket testing
Date: Wed, 08 Aug 2012 14:52:57 -0400
Message-ID:
 <CA+3gBc=+FCv_7cGgwVSfFZPobaLc4QgLwqLJFWUEFGT=sPCBgA@mail.gmail.com>
In-Reply-To: <4156be7f95d3d01f3a220bebf7febf58.squirrel@crocodile-rcs.com>
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Thank you for your time Peter.

I'll setup a VM with Windows to continue with my tests and I'll come back
later with more feedback.

Regards.

Carlos.

On Wed, Aug 8, 2012 at 12:22 PM, Peter Dunkley <
peter.dunkley(a)crocodile-rcs.com> wrote:

> Hi,
>
> I have added some comments in-line below.
>
> Regards,
>
> Peter
>
> > 1. After setting up the proxy ip:port in the call.htm file (of sipml5) to
> > *
> > 127.0.0.1:5060* the client started to work but kamailio script refused
> to
> > establish my connection because the following condition was not
> satisfied:
> >
> >
> > *if ($Rp !=3D MY_WS_PORT && $Rp !=3D MY_WSS_PORT) {*
> > *                xlog("L_WARN", "HTTP request received on $Rp\n");*
> > *                xhttp_reply("403", "Forbidden", "", "");*
> > *                exit;*
> > *}*
> >
> > *MY_WS_PORT* and *MY_WSS_PORT *are set to 80 and 443 respectively, as the
> > default config example of websocket module says so.
> >
> > Then, I decided to change the ip:port to *127.0.0.1:80*, always in the
> > call.htm file and afterwards the condition was satisfied but sipml5 dies
> > with
> >
> >  SIP stack start: proxy=3D'127.0.0.1:80', realm=3D'<sip:127.0.0.1>',
> > impi=3D'2000', impu=3D'<sip:2000(a)127.0.0.1>'
> > tsk_utils.js:97<
> http://127.0.0.1/sipml5/src/tinySAK/src/tsk_utils.js?svn=3D5>
> >  Connecting to 'ws://127.0.0.1:80'
> > tsk_utils.js:97<
> http://127.0.0.1/sipml5/src/tinySAK/src/tsk_utils.js?svn=3D5>
> >  Stack starting
> > tsk_utils.js:97<
> http://127.0.0.1/sipml5/src/tinySAK/src/tsk_utils.js?svn=3D5>
> >  Unexpected response code: 200 :1 <http://127.0.0.1/>
> >  __tsip_transport_ws_onerror
> > tsk_utils.js:97<
> http://127.0.0.1/sipml5/src/tinySAK/src/tsk_utils.js?svn=3D5>
> >  __tsip_transport_ws_onclose
> > tsk_utils.js:97<
> http://127.0.0.1/sipml5/src/tinySAK/src/tsk_utils.js?svn=3D5>
> >  Failed to connet to the server
> >
> > Finally, I ended up commenting the condition block and restored the
> > original values of ip:port to *127.0.0.1:5060* .
> >
> > Having done that, I tried again and another error was thrown but this
> > time,
> > in the next condition block: * if ($hdr(Host) =3D=3D $null ||
> > !is_myself($hdr(Host))) *
> >
> > <script>: WebSocket
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <script>:
> > Host:
> > 127.0.0.1:5060
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <script>:
> >  Origin: http://127.0.0.1
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <core>
> > [socket_info.c:589]: grep_sock_info - checking if host=3D=3Dus: 14=3D=3D9=
 && [
> > 127.0.0.1:5060] =3D=3D [127.0.0.1]
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <core>
> > [socket_info.c:589]: grep_sock_info - checking if host=3D=3Dus: 14=3D=3D9=
 && [
> > 127.0.0.1:5060] =3D=3D [127.0.0.2]
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <core>
> > [socket_info.c:589]: grep_sock_info - checking if host=3D=3Dus: 14=3D=3D1=
3 && [
> > 127.0.0.1:5060] =3D=3D [192.168.10.95]
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <core>
> > [socket_info.c:589]: grep_sock_info - checking if host=3D=3Dus: 14=3D=3D1=
3 && [
> > 127.0.0.1:5060] =3D=3D [192.168.10.55]
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <core>
> > [socket_info.c:589]: grep_sock_info - checking if host=3D=3Dus: 14=3D=3D9=
 && [
> > 127.0.0.1:5060] =3D=3D [127.0.0.1]
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <core>
> > [socket_info.c:589]: grep_sock_info - checking if host=3D=3Dus: 14=3D=3D9=
 && [
> > 127.0.0.1:5060] =3D=3D [127.0.0.2]
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <core>
> > [socket_info.c:589]: grep_sock_info - checking if host=3D=3Dus: 14=3D=3D1=
3 && [
> > 127.0.0.1:5060] =3D=3D [192.168.10.95]
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <core>
> > [socket_info.c:589]: grep_sock_info - checking if host=3D=3Dus: 14=3D=3D1=
3 && [
> > 127.0.0.1:5060] =3D=3D [192.168.10.55]
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: DEBUG: <core>
> > [forward.c:462]: *check_self: host !=3D me*
> > Aug  8 11:30:53 carlosrdcnx-laptop kamailio[16238]: WARNING: <script>:
> Bad
> > host 127.0.0.1:5060
> >
> > I commented the block too and only then sipml5 was able to register
> > itself.
> >
> > What am I doing wrong here?
> >
>
> When I tested this I was hosting sipml5 on a web-server on a separate
> machine from Kamailio, and my web-browser was on a separate machine from
> both Kamailio and the web-server.  The example configuration works for
> that scenario (which is likely to be the way it would be deployed in a
> real system).  I suspect that the Kamailio listen directives (or something
> else related) aren't set-up quite right for your environment.
>
> Host: is a required header when establishing a WebSocket connection.  The
> Host: header added by the client should indicate the name of the server
> the client is trying to connect to as indicated in the WebSocket URI (so
> if you put an IP address in the URI that will be in the Host: header, if
> you put a hostname in the URI then it will be in the Host: header).  The
> WebSocket server (in this case Kamailio) should check that this header
> matches what it believes it's externally visible name is before accepting
> the connection.
>
> This check needs to be performed in kamailio.cfg instead of the WebSocket
> module in order for the check to be flexible.  The check in the example
> kamailio.cfg is:
> - Making sure the Host: header is present
> - Making sure the name in the Host: header is an IP address (as defined in
> the listen directives) or alias (for example a domain name) that the
> Kamailio instance believes it is authoritative for.
>
> As the WebSocket stack in a web-browser will add the Host: header
> automatically, any problem with this suggests that the WebSocket URI set
> in sipml5 and the listen/alias directives in kamailio.cfg don't match -
> which would be consistent with the first part your connection
> establishment problem too.
>
> I would suggest that you should re-instate these lines as, by commenting
> them out (rather than fixing the underlying problems in the test set-up),
> you may be moving the issues down-stream.
>
> > 2. I registered a legacy softphone (twinkle) to attempt to initiate a
> call
> > in both ways, but the was something wrong with the signaling, probably
> > some
> > frame decoding garbage in the buffer of the SIP message. Perhaps these
> > bytes are part of the frame control header but since I haven't read the
> > RFC
> > (yet) I am mentioning it anyway.
> >
> > tcp_send: buf=3D*#012=EF=BF=BD~#003=EF=BF=BD*INVITE
> > sip:2000(a)df7jal23ls0d.invalid;transport=3Dws
> > SIP/2.0#015#012Record-Route:
> > <sip:127.0.0.1;transport=3Dws;r2=3Don;lr=3Don>#015#012Record-Route:
> > <sip:127.0.0.1;r2=3Don;lr=3Don>#015#012Via: SIP/2.0/WS
> >
>  127.0.0.1;branch=3Dz9hG4bK90a8.b1a7035e13ed19880dd12a1f4c86adbb.0#015#012V=
ia:
> > SIP/2.0/UDP
> > 127.0.0.1:5062;rport=3D5062;branch=3Dz9hG4bKimixlbyp#015#012Max-Forwards:
> > 69#015#012To: <sip:2000(a)127.0.0.1>#015#012From: "1000"
> > <sip:1000(a)127.0.0.1>;tag=3Dlrtfz#015#012Call-ID:
> > gxsqobolphfchfq(a)carlosrdcnx-laptop.site#015#012CSeq: 654
> > INVITE#015#012Contact: <sip:1000(a)127.0.0.1:5062>#015#012Content-Type:
> > application/sdp#015#012Allow:
> >
> INVITE,ACK,BYE,CANCEL,OPTIONS,PRACK,REFER,NOTIFY,SUBSCRIBE,INFO,MESSAGE#015=
#012Supported:
> > replaces,norefersub,100rel#015#012User-Agent:
> > Twinkle/1.4.2#015#012Content-Length:
> > 302#015#012#015#012v=3D0#015#012o=3Dtwinkle 391470222 1383232165 IN IP4
> > 127.0.0.1#015#012s=3D-#015#012c=3DIN IP4 127.0.0.1#015#012t=3D0
> 0#015#012m=3Daudio
> > 8008 RTP/AVP 98 97 8 0 3 101#015#012a=3Drtpmap:98
> > speex/16000#015#012a=3Drtpmap:97 speex/8000#015#012a=3Drtpmap:8
> > PCMA/8000#015#012a=3Drtpmap:0 PCMU/8000#015#012a=3Drtpmap:3
> > GSM/8000#015#012a=3Drtpmap:101 telephone-event/8000#015#012a=3Dfmtp:101
> > 0-15#015#012a=3Dptime:20#015#012
> >
>
> That INVITE is for a call towards sipml5 on a WebSocket connection.  So
> this isn't a SIP message over TCP, it is a SIP message over WebSockets
> over TCP - and those are not the same thing.  The stuff at the start of
> the TCP buffer is the WebSocket framing and it is meant to be there.
>
> The WebSocket framing will not be present on the connection to Twinkle.
>
> > 3. Does Twinkle support the minimum media requirements for testing? If
> > not,
> > what (Linux) softphone is suitable for this purpose?
> >
>
> When using an up-to-date Google Chrome you need to use a client that
> supports RTP/SAVPF.  Boghe (from Doubango) is a Windows client that
> supports this.  I don't know which (if any) Linux clients support this
> feature.
>
> --
> Peter Dunkley
> Technical Director
> Crocodile RCS Ltd
>
>
> _______________________________________________
> sr-dev mailing list
> sr-dev(a)lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
>



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--===============1978706181==--