[OpenSIPS-Users] Extract value from SIP Content?
Paul Smith
Paul.Smith at ClarityTele.com
Wed Sep 29 11:42:38 CEST 2010
Hi Bogdan,
Thanks for all the support, should I raise a bug report somewhere?
Paul.
Bogdan-Andrei Iancu wrote:
> Hi Paul,
>
> Paul Smith wrote:
>
>> Hi Bogdan,
>> There is something else going on. I tried the match you suggested and
>> see the same result as previously in my log:
>> extracted character: 1 : #012Duration=160
>>
>> In my substitution I am appending " : " to \2, and in my resulting
>> $avp(s:dtmf) I see the string is made up of \2 + " : " + \3. Why is \3
>> in there at all?
>>
>>
> hmm....good question....it shouldn't be there....
>
>> Is this something to do with search across lines and the #015#012
>> characters.... Still confused.
>>
>> Als0 [0-9] does not match * or # which are also passed as DTMF
>> Signals... but I'll work that out if I can get it extract a digit properly.
>>
>>
> well, make it [\#\*0-9] to include the 2 chars also.... :)
>
> Regards,
> Bogdan
>
>> Regards,
>> Paul
>>
>> Bogdan-Andrei Iancu wrote:
>>
>>
>>> Hi Paul,
>>>
>>> the subst is too permissive and the string to the end is matched by the
>>> second token.
>>>
>>> try:
>>>
>>> avp_subst("$avp(s:msg)/$avp(s:dtmf)/g","/(^.*Signal=)([0-9]+)(.*$)/\2 : /");
>>>
>>> Regards,
>>> bogdan
>>>
>>> Paul Smith wrote:
>>>
>>>
>>>
>>>> Sorry I replied to "Opensips Cluster thread"... obviously this is unrelated!
>>>>
>>>> I have made a little more progress but the avp_subst is still not
>>>> behaving as I expect.
>>>>
>>>> if I use the following code:
>>>> # look for "Signal=" and append following character to collected dtmfs
>>>> $avp(s:msg)=$rb;
>>>> avp_subst("$avp(s:msg)/$avp(s:dtmf)/g","/(^.*Signal=)(.)(.*$)/\2 : /");
>>>> xlog("Got an info packet with message buffer : $mb\n\n extracted
>>>> character: $avp(s:dtmf)");
>>>>
>>>> I get:
>>>> extracted character: * : #012Duration=160
>>>>
>>>> Why is mys avp(s:dtmf) still getting appended with "#012Duration=160" ?
>>>> I just want to get the matched character \2.
>>>>
>>>>
>>>> Thanks
>>>>
>>>> paul
>>>>
>>>>
>>>>
>>>> =======================================
>>>> original post:
>>>>
>>>> Hi,
>>>> I am sure this is trivial... but I'm getting lost again.
>>>>
>>>> I would like to extract and log a value from the Content of a SIP INFO
>>>> message... for example during a call I can send DTMF as SIP-INFO
>>>> messages, how can I extract the value of the key pressed from the
>>>> message? The relevant bit of the message if "1" is pressed I see a SIP
>>>> INFO with content including "Signal=1."
>>>>
>>>> I tried:
>>>> $avp(s:msg)=$mb;
>>>> avp_subst("$avp(s:msg)/$avp(s:dtmf)/g","/(^.*Signal)(=.)(.*$)/\2/g");
>>>> xlog("Got an info packet with message buffer : $mb\n\n extracted
>>>> character: $avp(s:dtmf)");
>>>>
>>>> and that yielded:
>>>> Got an info packet with message buffer : INFO
>>>> sip:600 at 192.168.4.129:5060;nat=yes SIP/2.0#015#012Via: SIP/2.0/UDP
>>>> y.y.y.y:56709;branch=z9hG4bK-mpz3k73e2wsm;rport#015#012Route:
>>>> <sip:x.x.x.x;r2=on;lr=on;did=1db.36f29f36>#015#012Route:
>>>> <sip:212.108.76.52;r2=on;lr=on;did=1db.36f29f36>#015#012From: "101"
>>>> <sip:101 at my.realm.com>;tag=89sal3htwp#015#012To:
>>>> <sip:*600 at my.realm.com>;tag=as01c3f123#015#012Call-ID:
>>>> 3c2b6cf968d0-cxl5nzv16j4m#015#012CSeq: 3 INFO#015#012Max-Forwards:
>>>> 69#015#012Contact:
>>>> <sip:101 at y.y.y.y:56709>;reg-id=1#015#012User-Agent:
>>>> snom360/7.3.30#015#012Content-Type:
>>>> application/dtmf-relay#015#012Content-Length:
>>>> 22#015#012#015#012Signal=7#015#012Duration=160#012#012
>>>>
>>>> extracted character: INFO sip:600 at 192.168.4.129:5060;nat=yes
>>>> SIP/2.0#015#012Via: SIP/2.0/UDP
>>>> y.y.y.y:56709;branch=z9hG4bK-mpz3k73e2wsm;rport#015#012Route:
>>>> <sip:x.x.x.x;r2=on;lr=on;did=1db.36f29f36>#015#012Route:
>>>> <sip:212.108.76.52;r2=on;lr=on;did=1db.36f29f36>#015#012From: "101"
>>>> <sip:101 at my.realm.com>;tag=89sal3htwp#015#012To:
>>>> <sip:*600 at my.realm.com>;tag=as01c3f123#015#012Call-ID:
>>>> 3c2b6cf968d0-cxl5nzv16j4m#015#012CSeq: 3 INFO#015#012Max-Forwards:
>>>> 69#015#012Contact:
>>>> <sip:101 at y.y.y.y:56709>;reg-id=1#015#012User-Agent:
>>>> snom360/7.3.30#015#012Content-Type:
>>>> application/dtmf-relay#015#012Content-Length:
>>>> 22#015#012#015#012=7#012Duration=160
>>>>
>>>>
>>>>
>>>> The ngrep of a SIP INFO for a DTMF tone looks like:
>>>> U y.y.y.y:54762 -> x.x.x.x:5060
>>>> INFO sip:600 at 192.168.4.129:5060;nat=yes SIP/2.0.
>>>> Via: SIP/2.0/UDP y.y.y.y:57439;branch=z9hG4bK-v8mow8y2kfhc;rport.
>>>> Route: <sip:x.x.x.x;r2=on;lr=on;did=2f.eef579c3>.
>>>> Route: <sip:212.108.76.52;r2=on;lr=on;did=2f.eef579c3>.
>>>> From: "101" <sip:101 at my.realm.com>;tag=6hud1tlbxx.
>>>> To: <sip:*600 at my.realm.com>;tag=as0e050d3f.
>>>> Call-ID: 3c2b80578888-2z8ol0vc5860.
>>>> CSeq: 3 INFO.
>>>> Max-Forwards: 70.
>>>> Contact: <sip:101 at y.y.y.y:57439>;reg-id=1.
>>>> User-Agent: snom360/7.3.30.
>>>> Content-Type: application/dtmf-relay.
>>>> Content-Length: 22.
>>>> .
>>>> Signal=1.
>>>> Duration=160
>>>> #
>>>> U x.x.x.x:5060 -> y.y.y.y:54762
>>>> SIP/2.0 200 OK.
>>>> Via: SIP/2.0/UDP
>>>> y.y.y.y:57439;received=y.y.y.y;branch=z9hG4bK-v8mow8y2kfhc;rport=54762.
>>>> From: "101" <sip:101 at my.realm.com>;tag=6hud1tlbxx.
>>>> To: <sip:*600 at my.realm.com>;tag=as0e050d3f.
>>>> Call-ID: 3c2b80578888-2z8ol0vc5860.
>>>> CSeq: 3 INFO.
>>>> Server: Asterisk PBX 1.6.2.9.
>>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO.
>>>> Supported: replaces, timer.
>>>> Content-Length: 0.
>>>> .
>>>>
>>>>
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>>>>
>>>>
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>>>>
>>>>
>>>>
>>>
>>>
>>>
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>
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