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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>I have tested how I can control a SIP-phone receiving
a call to go off-hook. This is possible by sending a NOTIFY with the SIP Event-header
set to talk.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>My problem is that the NOTIFY message does not
include exactly the same SIP To-header information as the FS received as a
RINGING response to the INVITE: The tag from the RINGING response, which the
phone adds to the SIP To-header, is not included in the NOTIFY. Snom-phones -
and possibly other SIP phones as well, uses this tag in the SIP To-header to pinpoint
the exact call to be answered.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>The information is actually present before the NOTIFY
is sent. I have tested it in the dialplan using the info application just
before firing off the sendevent NOTIFY.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Is there any reason for this behaviour, which I
should be aware of before dabbling with the code?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>I have checked the mod_sofia.c code and have found
the code which sends the NOTIFY (with the uuid, event and message type as input
parameters):<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'>if (uuid
&& ct && es) {<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'> switch_core_session_t
*session;<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'> private_object_t
*tech_pvt;<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'>
//Jon changed:
SIPTAG_SUBSCRIPTION_STATE_STR("terminated;reason=noresource") to
SIPTAG_SUBSCRIPTION_STATE_STR("active")<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'> if
((session = switch_core_session_locate(uuid))) {<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'> if
((tech_pvt = switch_core_session_get_private(session))) {<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'> nua_notify(tech_pvt->nh,<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'>
NUTAG_NEWSUB(1), SIPTAG_SUBSCRIPTION_STATE_STR("active"),<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'>
SIPTAG_EVENT_STR(es), SIPTAG_CONTENT_TYPE_STR(ct), TAG_IF(!zstr(body),
SIPTAG_PAYLOAD_STR(body)), TAG_END());<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'> }<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'> switch_core_session_rwunlock(session);<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=1 face="Courier New"><span
lang=EN-GB style='font-size:9.0pt;font-family:"Courier New"'> }<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 face="Courier New"><span lang=EN-GB
style='font-size:9.0pt;font-family:"Courier New"'>}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>But in order to change the behaviour, I may need to
look somewhere else. Some hints as to where to look would be appreciated!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Regards Jon<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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