On 24/07/2014 17:26, Daniel-Constantin Mierla wrote:
checking docs, it seems like that. I will have to look at the code and
eventually make an option without parameter. Otherwise, like it is
not, the parameter forces an outbound proxy to be used for forwarding.
I guess that makes sense for setting $ds to replicate the message and
explains the behaviour I was seeing both branches going to $ds which was
set in t_replicate uri param.
You sent me the sip trace and you can see there that two register
requests are sent out, both to the address in the parameter of the
t_replicate(), but one has the address from append_branch() in r-uri.
So the forking was done.
Maybe you can try with a look via kamailio itself:
$ru = uri1;
append_branch("uri2");
t_replicate("sip:kamailioip:kamailioport");
Then you see that is coming with src_ip==myself and simply do
t_relay() and the r-uri should point to where it needs to be forwarded.
Can you forsee any issues with using 2 forward requests instead of
t_replicate. the only difference i can see in the message is that the
second forward adds a duplicate (expected behaviour) via address (i
presume because the message already had a via added in the previous
forward. So what I was thinking was, something like this:
on registrar 1:
save("location")
forward(BACKUP_REGISTRAR_2);
forward(BACKUP_REGISTRAR_3);
then on the 2nd registrar something like this:
if ( src_ip == BACKUP_REGISTRAR_1 || src_ip == BACKUP_REGISTRAR_3 ) {
save("location","0x02");
exit;
};
I use 0x02 flag so that save does not send reply because forward above
is stateless.
A 'kamctl ul show <contact>' seems to look the same accross the 3
registrars when testing.
The only thing I can think of is if kamailio is really busy and does not
get to process the message, because forward is stateless, it wont
re-transmit a couple times to relay the message.
I guess, it would be nice if t_replicate accepted a couple of uri to
replicate to then for each uri set $ds to uri an send message, however,
I'm not sure if that is even feasable :)
Thanks
Bruce
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