[fpc-pascal] Help Reading SIP Messages.

[ik]

Hello,

SIP first of all uses UDP most of the times (and rarely TCP) .
It only create a tunnel that other protocols such as RDP and SDP are going
inside.

Can you explain a bit more what exactly do you wish to implement (i'm not
sure that I understand) ?

Ido

http://ik.homelinux.org/


On Tue, Jan 5, 2010 at 15:08, lloyd thomas <lloydie.t at googlemail.com> wrote:

> Please forgive my ignorance regarding the project I am about to embark on.
> Need some advice on Lnet and capturing SIP RTP data to file. In the first
> instance I just need to work with the sip messages. I believe the SIP
> messages are similar to HTTP. I am using wireshark to understand how the SIP
> messages are processed, but I am not sure how to capture and read each frame
> (wireshark speak) using Lnet.
>
> (FYI:
> http://en.wikipedia.org/wiki/Session_Initiation_Protocol#SIP_network_elements
> )
>
> For instance the following is from frame 12 (935 bytes)
>
> ----------------------------------------------------------------------------------------------
> INVITE sip:1002 at 192.168.91.200 <sip%3A1002 at 192.168.91.200> SIP/2.0
> Via:SIP/2.0/UDP 192.168.91.190:5060;rport;branch=z9hG4bK83570061
> From:"Lloyd" <sip:1000 at 192.168.91.200 <sip%3A1000 at 192.168.91.200>
> >;tag=4b428357-2fa-1ec5d4e
> To:<sip:1002 at 192.168.91.200 <sip%3A1002 at 192.168.91.200>>
> Contact:"Lloyd" <sip:1000 at 192.168.91.190:5060;transport=UDP>
> Call-ID:83570000-4ce59f27 at 192.168.91.200<Call-ID%3A83570000-4ce59f27 at 192.168.91.200>
> Subject:sip phone call
> CSeq:2112045024 INVITE
> User-Agent:Mitel-5212-SIP-Phone 07.02.00.04 08000F24BEE5
> Allow:INVITE,ACK,CANCEL,BYE,OPTIONS,REFER,NOTIFY,PRACK,UPDATE
> Allow-Events:talk,hold,conference
> Supported:timer,100rel,replaces
> Session-Expires: 1800
> Min-SE: 90
> Max-Forwards:70
> Content-Type:application/sdp
> Content-Length:247
>
> v=0
> o=1000 1262650963 1262650962 IN IP4 192.168.91.190
> s=SIP Call
> c=IN IP4 192.168.91.190
> t=0 0
> a=sendrecv
> m=audio 20036 RTP/AVP 0 8 18 96
> a=rtpmap:0 PCMU/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:18 G729/8000
> a=rtpmap:96 telephone-event/8000
>
> -----------------------------------------------------------------------------------------------
>
> I get a response from the sip server on frame 13 (371 bytes)
>
> ----------------------------------------------------------------------------------------------
> SIP/2.0 100 Trying
> Via: SIP/2.0/UDP 192.168.91.190:5060;rport=5060;branch=z9hG4bK83570061
> From: "Lloyd" <sip:1000 at 192.168.91.200 <sip%3A1000 at 192.168.91.200>
> >;tag=4b428357-2fa-1ec5d4e
> To: <sip:1002 at 192.168.91.200 <sip%3A1002 at 192.168.91.200>>
> Call-ID: 83570000-4ce59f27 at 192.168.91.200
> CSeq: 2112045024 INVITE
> User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-15355M
> Content-Length: 0
>
> -----------------------------------------------------------------------------------------------
>
>
>
>
> _______________________________________________
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> http://lists.freepascal.org/mailman/listinfo/fpc-pascal
>
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