[asterisk-users] SIP Simple support on Asterisk 11

[Eloi Bail]

Hi,

Thanks a lot for this detailed answer :

- I managed to have it working disabling auth message request
: auth_message_requests = no in sip.conf
- pedantic=no does not resolve the issue
- reenabling  auth_message_requests = yes and removing pedantic option,
your patch in chan_sip resolves the issues !

As it looks like pidgin has an issue, I guess that we can use it as a
workaround.

I would like know to enable presence notification between each users. To
fulfill it, I am using
http://asteriskdocs.org/en/3rd_Edition/asterisk-book-html-chunk/DeviceStates_id265377.html

Am I doing it in a good way ?

Thanks !

Eloi


On Wed, Jun 19, 2013 at 12:11 PM, Matthew J. Roth <mroth at imminc.com> wrote:

> Eloi Bail wrote:
> >
> > I am trying to enable SIP SIMPLE communication in my test environment.
> >
> > I have the following env :
> >
> > - one server (192.168.50.126) with Asterisk 11
> > - 2 clients using pidgin : demo-bob and demo-alice on my 192.168.50.143
> >
> > I successfully had a phone call between clients.
> >
> > I used the following link to enable SIMPLE messaging between my clients :
> >
> http://highsecurity.blogspot.ca/2012/03/asterisk-10-110-sms-messaging-or-sip.html
> >
> > Both users managed to register.
> >
> > Adding verbose on the server, I have the following traces when I send the
> > message "MESSAGE FROM ALICE TO BOB" from "demo-alice" to "demo-bob"
> >
> > http://paste.fedoraproject.org/19489/37158861/
> >
> > As you can see I succeed to have the message sent from alice to Asterisk.
> >
> > When the server is trying to transmitting, I see a 401 error message.
> > According to this post (
> http://forums.digium.com/viewtopic.php?f=1&t=72814 )
> > the first 401 should be normal as authentication is requested.
> >
> > Afterwards the server emit 202 message.
> >
> > But "demo-bob" never receives a message.
> > I ran wireshark on server and client. It confirms that no message is
> sent from
> > Asterisk to "demo-bob".
> >
> > Could you please give me advice ?
> >
> > Here are my extensions.conf and sip.conf according to the link I
> mentioned.
> > http://paste.fedoraproject.org/19626/16493741/
> >
> > http://paste.fedoraproject.org/19627/49423137/
>
>
> Eloi,
>
> The trace shows that the initial MESSAGE from Alice does not include an
> Authorization header so Asterisk responds with a 401 Unauthorized.  Alice
> then
> replies with a MESSAGE with an Authorization header, but reuses the same
> CSeq
> header (CSeq: 6 MESSAGE) which causes Asterisk to ignore it as a
> retransmit:
>
> > [Jun 18 16:49:35] DEBUG[16266] chan_sip.c: Ignoring SIP message because
> of
> > retransmit (MESSAGE Seqno 6, ours 6)
>
> I believe this is a bug in Pidgin because RFC 3261 [1] states:
>
>    CSeq or Command Sequence contains an integer and a method name.  The
>    CSeq number is incremented for each new request within a dialog and
>    is a traditional sequence number.
>    ...
>    Requests within a dialog MUST contain strictly monotonically
>    increasing and contiguous CSeq sequence numbers (increasing-by-one)
>    in each direction (excepting ACK and CANCEL of course, whose numbers
>    equal the requests being acknowledged or cancelled).
>
> However, there is also a similar issue [2] that can be worked around by
> setting
> "pedantic=no" in sip.conf.  If that doesn't work, you can give the
> following
> (untested) patch to chan_sip.c a try:
>
>
> ================================================================================
> --- chan_sip.c.orig     2013-06-19 11:44:38.000000000 -0400
> +++ chan_sip.c  2013-06-19 11:47:22.000000000 -0400
> @@ -28078,6 +28078,7 @@
>         } else if (p->icseq &&
>                    p->icseq == seqno &&
>                    req->method != SIP_ACK &&
> +                  p->method != SIP_MESSAGE &&
>                    (p->method != SIP_CANCEL || p->alreadygone)) {
>                 /* ignore means "don't do anything with it" but still have
> to
>                    respond appropriately.  We do this if we receive a
> repeat of
>
> ================================================================================
>
> Good luck and please let the list know how this works out.
>
> [1] http://www.ietf.org/rfc/rfc3261.txt
> [2] https://issues.asterisk.org/jira/browse/ASTERISK-19139
>
> Regards,
>
> Matthew Roth
> InterMedia Marketing Solutions
> Software Engineer and Systems Developer
>
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