[OpenSIPS-Users] Feature request - RFC 3994 and RFC 5438 support for instant messaging

Bogdan-Andrei Iancu bogdan at opensips.org
Wed May 13 08:29:26 UTC 2026 

Could you send me the SIP message as pcap?

Regards,

Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
   https://www.opensips-solutions.com
   https://www.siphub.com


On 5/12/26 17:52, Robert Dyck wrote:
>
> Experimenting - Try to expose for example state.
>
>
>  $xml(bla) = $rb(application/im-iscomposing+xml);
>  xlog("$xml(bla/isComposing/state)\n");
>
>
> *NOTICE:If content-type is message/cpim don't store it*
>
> DBG:core:parse_headers_aux: flags=ffffffffffffffff
>
> DBG:core:decode_mime_type: Decoding MIME type 
> for:[message/cpim]DBG:core:pv_get_msg_body: --------mime is <196863>, 
> idx=0DBG:core:pv_get_msg_body: Index too big [0], 
> body_part=(nil)*ERROR:xml:pv_set_xml: Uninitialized xml object: 
> bla**ERROR:core:do_assign: setting PV failed**ERROR:core:do_assign: 
> error at /usr/local/etc/opensips/opensips.cfg:670*
>
> DBG:xml:pv_get_xml: Unknown object <bla>
> *NOTICE:<null>*
>
> The second content-type is invisible to opensips.
>
>
> I don't think opensips knows about mime message/cpim.
>
> Some functions, for instance handle_publish assume that the start of 
> the body is also the start of xml. With message/cpim that is not the case.
>
>
> Here is the part of MESSAGE that is of interest.
>
>
> Content-Encoding: deflate
>
> Content-Type: message/cpim
>
> Content-Length: 249
>
> Priority: non-urgent
>
> Expires: 0
>
> User-Agent: Linphone-Desktop/6.2.0-beta.19+1d6910749 (silver.mylan) 
> fedora/44 Qt/6.9.1 LinphoneSDK/5.5.0-beta-84-g7a481f7e71
>
> Message Body
>
> From: <sip:8 at 192.168.1.2>\r\n
>
> To: <sip:9 at 192.168.1.2>\r\n
>
> DateTime: 2026-05-04T16:46:24Z\r\n
>
> \r\n
>
> Content-Type: application/im-iscomposing+xml\r\n
>
> Content-Length: 207\r\n
>
> \r\n
>
> <?xml version="1.0" encoding="UTF-8" standalone="no" ?><isComposing 
> xmlns="urn:ietf:params:xml:ns:im-iscomposing"><state>active</state><contenttype>text/plain</contenttype><refresh>60</refresh></isComposing>
>
>
> message/cpim enforces this format for the body.
>
>
> On Tuesday, May 12, 2026 2:49:49 a.m. Pacific Daylight Time you wrote:
>
> > IF you have a multi-part body, shouldn't this do the trick:
>
> >
>
> > $xml(bla) = $rb(application/im-iscomposing+xml);
>
> >
>
> > [1] https://opensips.org/Documentation/Script-CoreVar-3-6#rb
>
> >
>
> >
>
> > Regards,
>
> >
>
> > Bogdan-Andrei Iancu
>
> >
>
> > OpenSIPS Founder and Developer
>
> > https://www.opensips-solutions.com
>
> > https://www.siphub.com
>
> >
>
> > On 5/11/26 18:40, Robert Dyck wrote:
>
> > > I don't think that $xml() can be made to work. The first parameter for
>
> > > $xml() is the name of an xml object. This would work for the xml we
>
> > > create ourself with xml module. How would we extract an xml and 
> name it.
>
> > >
>
> > > I thought about using the content type as a filter. This was 
> problematic
>
> > > because MESSAGE ( RFC 3248 page mode ) allows SIP headers in the 
> body. We
>
> > > receive two Content-Type headers. I tried using $cT[index] but the 
> second
>
> > > Content-Type is never found. Using any index always just returns 
> the first
>
> > > instance.
>
> > >
>
> > > I tried using sipmsgops has_body_part( mime ). This doesn't work 
> for the
>
> > > same reason filtering the content type didn't work. This function uses
>
> > > the content type as the first step in its filter. It will never find
>
> > > "Content-Type: application/im-iscomposing+xml".
>
> > >
>
> > > I can keep the xml from being stored in the silo by filtering on
>
> > > "Content-Type message/cpim" but I am not happy with it. It is not
>
> > > specific enough and may cause issues.
>
> > >
>
> > > On Thursday, May 7, 2026 1:36:49 a.m. Pacific Daylight Time you wrote:
>
> > >> if you have $xml(bla) = "....some xml....";
>
> > >>
>
> > >> Try like $xml(bla/isComposing.attr/xmlns)
>
> > >>
>
> > >> Regards,
>
> > >>
>
> > >> Bogdan-Andrei Iancu
>
> > >>
>
> > >> OpenSIPS Founder and Developer
>
> > >>
>
> > >> https://www.opensips-solutions.com
>
> > >> https://www.siphub.com
>
> > >>
>
> > >> On 5/6/26 22:19, Robert Dyck wrote:
>
> > >>> I am trying to understand $xml() and added some logging to the 
> script.
>
> > >>>
>
> > >>> I know the contents of the xml doc.
>
> > >>>
>
> > >>> <?xml version="1.0" encoding="UTF-8" standalone="no" ?>
>
> > >>>
>
> > >>> <isComposing xmlns="urn:ietf:params:xml:ns:im-iscomposing">
>
> > >>>
>
> > >>> <state>active</state>
>
> > >>>
>
> > >>> <contenttype>text/plain</contenttype>
>
> > >>>
>
> > >>> <refresh>60</refresh>
>
> > >>>
>
> > >>>   </isComposing>'
>
> > >>>
>
> > >>> Using statements such as "xlog("xlm is $xml(?xml/isComposing)\n");"
>
> > >>>
>
> > >>> I get DBG:xml:pv_get_xml: Unknown object <?xml>
>
> > >>> The same if I ignore the version element and try "isComposing".
>
> > >>>
>
> > >>> It says Unknown object <isComposing>
>
> > >>>
>
> > >>>
>
> > >>> Printing the entire $xml doesn't work.
>
> > >>>
>
> > >>> BG:core:parse_headers_aux: flags=ffffffffffffffff
>
> > >>> [266B blob data]
>
> > >>>
>
> > >>> On Wednesday, May 6, 2026 1:08:11 a.m. Pacific Daylight Time you 
> wrote:
>
> > >>>> According to the grammar [1], you have access to the attributes:
>
> > >>>>
>
> > >>>>
>
> > >>>>
>
> > >>>> access = .val | .attr/string | .attr/$var
>
> > >>>>
>
> > >>>>
>
> > >>>>
>
> > >>>> An example:
>
> > >>>>
>
> > >>>>
>
> > >>>>
>
> > >>>> $xml(my_doc/doc/list.attr/sort) = "asc";              # add
>
> > >>>
>
> > >>> attribute "sort"
>
> > >>>
>
> > >>>> to list node
>
> > >>>>
>
> > >>>>
>
> > >>>>
>
> > >>>>
>
> > >>>>
>
> > >>>> [1] https://opensips.org/docs/modules/3.6.x/xml.html#pv_xml
>
> > >>>>
>
> > >>>>
>
> > >>>>
>
> > >>>> Bogdan-Andrei Iancu
>
> > >>>>
>
> > >>>>
>
> > >>>>
>
> > >>>> OpenSIPS Founder and Developer
>
> > >>>>
>
> > >>>> https://www.opensips-solutions.com
>
> > >>>>
>
> > >>>> https://www.siphub.com
>
> > >>>>
>
> > >>>> On 5/4/26 17:31, Robert Dyck wrote:
>
> > >>>>> Yes.
>
> > >>>>>
>
> > >>>>> Or perhaps just detect the the presence of xlm. It should not go
>
> > >>>
>
> > >>> into the
>
> > >>>
>
> > >>>>> silo.
>
> > >>>>>
>
> > >>>>> On Monday, May 4, 2026 6:48:50 a.m. Pacific Daylight Time you 
> wrote:
>
> > >>>>>> You mean the xmlns attribute of the isComposing node ?
>
> > >>>>>>
>
> > >>>>>>
>
> > >>>>>>
>
> > >>>>>> Regards,
>
> > >>>>>>
>
> > >>>>>>
>
> > >>>>>>
>
> > >>>>>> Bogdan-Andrei Iancu
>
> > >>>>>>
>
> > >>>>>>
>
> > >>>>>>
>
> > >>>>>> OpenSIPS Founder and Developer
>
> > >>>>>>
>
> > >>>>>>
>
> > >>>>>>
>
> > >>>>>> https://www.opensips-solutions.com
>
> > >>>>>>
>
> > >>>>>> https://www.siphub.com
>
> > >>>>>>
>
> > >>>>>> On 4/27/26 19:21, Robert Dyck wrote:
>
> > >>>>>>> I have looked at the module and it is not clear to me how 
> one would
>
> > >>>>>>>
>
> > >>>>>>> extract the name space from the xml.
>
> > >>>>>>>
>
> > >>>>>>>
>
> > >>>>>>>
>
> > >>>>>>>
>
> > >>>>>>>
>
> > >>>>>>> <?xml version="1.0" encoding="UTF-8" standalone="no" ?>
>
> > >>>>>>>
>
> > >>>>>>> <isComposing xmlns="urn:ietf:params:xml:ns:im-iscomposing">
>
> > >>>>>>>
>
> > >>>>>>> <state>active</state>
>
> > >>>>>>>
>
> > >>>>>>> <contenttype>text/plain</contenttype>
>
> > >>>>>>>
>
> > >>>>>>> <refresh>60</refresh>
>
> > >>>>>>>
>
> > >>>>>>> </isComposing>'
>
> > >>>>>>>
>
> > >>>>>>> _______________________________________________
>
> > >>>>>>>>>
>
> > >>>>>>>>> Users mailing list
>
> > >>>>>>>>>
>
> > >>>>>>>>>
>
> > >>>>>>>>>
>
> > >>>>>>>>> Users at lists.opensips.org
>
> > >>>>>>>>>
>
> > >>>>>>>>>
>
> > >>>>>>>>>
>
> > >>>>>>>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
> > >>>>>>>
>
> > >>>>>>> On Monday, April 27, 2026 7:31:14 a.m. Pacific Daylight Time you
>
> > >>>
>
> > >>> wrote:
>
> > >>>>>>>> Robert,
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>> Check thishttps://opensips.org/docs/modules/3.6.x/xml.html
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>> Regards,
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>> Bogdan-Andrei Iancu
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>> OpenSIPS Founder and Developer
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>> https://www.opensips-solutions.com
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>>
>
> > >>>>>>>> https://www.siphub.com
>
>
>
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