[sr-dev] [tracker] Task opened: SDP parsing when dealing with multi-part bodies

sip-router admin at sip-router.org
Mon May 17 17:06:10 CEST 2010


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A new Flyspray task has been opened.  Details are below. 

User who did this - Pascal Maugeri (pmaugeri) 

Attached to Project - sip-router
Summary - SDP parsing when dealing with multi-part bodies
Task Type - Bug Report
Category - Core
Status - Assigned
Assigned To - Andrei Pelinescu-Onciul
Operating System - All
Severity - Low
Priority - Normal
Reported Version - Development
Due in Version - Undecided
Due Date - Undecided
Details - I got the following error when dealing with SIP INVITE with multi-part when the client is behind NAT:

May 12 15:27:04 test /usr/sbin/kamailio[1792]: ERROR: nathelper [nathelper.c:2954]: can't extract body from the message

The SIP INVITE message looks like:

INVITE sip:toto at test.net SIP/2.0
[...]
Content-Type: multipart/mixed;boundary=gnkr
Content-Length: 659

--gnkr
Content-Type: application/sdp
Content-Length: 330

v=0
o=pascal 1273565967736 1273565967737 IN IP4 10.1.1.226
[...]

It looks the Content-length within the multi-part is not accepted.

I fixed it changing the source code of parser/sdp/sdp_helpr_funcs.c, in get_sdp_hdr_field() function:

        switch(hdr->type){
                case HDR_CONTENTTYPE_T:
                case HDR_CONTENTDISPOSITION_T:
 
replaced with:

        switch(hdr->type){
                case HDR_CONTENTTYPE_T:
                case HDR_CONTENTDISPOSITION_T:
                case HDR_CONTENTLENGTH_T:
 
(I'm using kamailio 3.0.1)

Cheers
Pascal

More information can be found at the following URL:
http://sip-router.org/tracker/index.php?do=details&task_id=73

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