[OpenSIPS-Users] Extract value from SIP Content?

[Paul Smith]

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?

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.

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.
>>   .
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.opensips.org
>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.opensips.org
>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>
>>   
>>     
>
>
>