asterisk users - Jun 2004 - current code release & chan_sip problem/question rport

Updated to the latest code release of * today.  After compiling and reinstalling
the SIP dialout connections through our media gateway stopped working.   
Finally tracked down the issue.  In chan_sip.c in transmit_invite there was
;rport added to the INVITE via line of the msg:

snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP
%s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport,
p->branch);

The old code did not have that ;rport, it ends with the branch .    Can anyone
explain what that does?   I have taken it out, recompiled and can now make
outbound calls again.

Todd

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Modified Files:
chan_sip.c 
Log Message:
Enable support for RFC3581 (bug #1862)


bkw

  ----- Original Message ----- 
  From: Todd Graham 
  To: asterisk-users@lists.digium.com 
  Sent: Friday, June 18, 2004 11:05 PM
  Subject: [Asterisk-Users] current code release & chan_sip problem/question
rport


  Updated to the latest code release of * today.  After compiling and
reinstalling the SIP dialout connections through our media gateway stopped
working.    Finally tracked down the issue.  In chan_sip.c in transmit_invite
there was ;rport added to the INVITE via line of the msg:

  snprintf(p->via, sizeof(p->via), "SIP/2.0/UDP
%s:%d;branch=z9hG4bK%08x;rport", inet_ntoa(p->ourip), ourport,
p->branch);

  The old code did not have that ;rport, it ends with the branch .    Can anyone
explain what that does?   I have taken it out, recompiled and can now make
outbound calls again.

  Todd

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Thanks Brian.   Makes sense now.   I guess I need to forward this extension
info on to our media gateway vendor to get them to include in their SIP
stack.

Todd

----- Original Message ----- 
From: Brian K. West
To: asterisk-users@lists.digium.com
Sent: Friday, June 18, 2004 9:09 PM
Subject: Re: [Asterisk-Users] current code release & chan_sip
problem/question rport


Modified Files:
chan_sip.c
Log Message:
Enable support for RFC3581 (bug #1862)


bkw