asterisk users - Nov 2006 - Set port to which Asterisk should send its answer

Hi,

I'm sending the following message from port X to port 5060 of another box
running Asterisk, and it is answering back to port X from port 5060.
Shouldn't Asterisk use the Via header to find out where to answer, and in
this case send its answer to port 4000?

OPTIONS sip:192.168.0.103 SIP/2.0\r\n
Via: SIP/2.0/UDP 192.168.1.130:4000;branch=0.0\r\n
CSeq: 4711 OPTIONS\r\n\r\n

Thanks,

Andre

 
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nat=yes might cause this, since with NAT we cannot trust the IP or the 
port that is in the data part of the packet.

Andre Kirchner wrote:
> I'm sending the following message from port X to port 5060 of another
box running Asterisk, and it is answering back to port X from port 5060.
Shouldn't Asterisk use the Via header to find out where to answer, and in
this case send its answer to port 4000?
> 
> OPTIONS sip:192.168.0.103 SIP/2.0\r\n
> Via: SIP/2.0/UDP 192.168.1.130:4000;branch=0.0\r\n
> CSeq: 4711 OPTIONS\r\n\r\n

I am new to the Asterisk code, but it looks it the response to OPTIONS is
always sent to the IP address and UDP port that the request was received
from.  Also, it looks like Asterisk doesn't deal well the VIA header anyway.
In chan_sip.c it looks like to gives-up if the VIA contains
"SIP/2.0/UDP":

 

                if (strcasecmp(via, "SIP/2.0/UDP")) {

                        ast_log(LOG_WARNING, "Don't know how to respond
via
'%s'\n", via);

                        return -1;

                }

 

Check you log and see if the warning message is there.

 

Ron

 

 

  _____  

From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Andre Kirchner
Sent: Wednesday, November 15, 2006 1:16 PM
To: asterisk-users@lists.digium.com
Subject: [asterisk-users] Set port to which Asterisk should send its answer

 

Hi,

I'm sending the following message from port X to port 5060 of another box
running Asterisk, and it is answering back to port X from port 5060.
Shouldn't Asterisk use the Via header to find out where to answer, and in
this case send its answer to port 4000?

OPTIONS sip:192.168.0.103 SIP/2.0\r\n
Via: SIP/2.0/UDP 192.168.1.130:4000;branch=0.0\r\n
CSeq: 4711 OPTIONS\r\n\r\n

Thanks,

Andre

  

  _____  

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<http://us.rd.yahoo.com/evt=42297/*http:/advision.webevents.yahoo.com/mailbe
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Whoops, sorry - it only handles "SIP/2.0/UDP"; which is what is
expected,
but it seems like it only checks for the VIA header for REGISTER, INVITE,
CANCEL, BYE, and SUBSCRIBE requests.

 

 

Ron

 

 

  _____  

From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Andre Kirchner
Sent: Wednesday, November 15, 2006 1:16 PM
To: asterisk-users@lists.digium.com
Subject: [asterisk-users] Set port to which Asterisk should send its answer

 

Hi,

I'm sending the following message from port X to port 5060 of another box
running Asterisk, and it is answering back to port X from port 5060.
Shouldn't Asterisk use the Via header to find out where to answer, and in
this case send its answer to port 4000?

OPTIONS sip:192.168.0.103 SIP/2.0\r\n
Via: SIP/2.0/UDP 192.168.1.130:4000;branch=0.0\r\n
CSeq: 4711 OPTIONS\r\n\r\n

Thanks,

Andre

  

  _____  

Everyone is raving about the
<http://us.rd.yahoo.com/evt=42297/*http:/advision.webevents.yahoo.com/mailbe
ta>  all-new Yahoo! Mail beta.

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