[OpenSIPS-Users] 404 automatic failover
Pacho Baratta [fabbricadigitale]
P.Baratta at fabbricadigitale.it
Mon Oct 12 18:03:58 CEST 2009
As I said, I'm really a newbie. So I tried to modify the default routing logic, but no success.
Can you please tell me what's wrong with this?
Thanks all, pacho
####### Routing Logic ########
# main request routing logic
route{
if (!mf_process_maxfwd_header("10")) {
sl_send_reply("483","Too Many Hops");
exit;
}
if (has_totag()) {
# sequential request withing a dialog should
# take the path determined by record-routing
if (loose_route()) {
if (is_method("BYE")) {
setflag(1); # do accounting ...
setflag(3); # ... even if the transaction fails
} else if (is_method("INVITE")) {
# even if in most of the cases is useless, do RR for
# re-INVITEs alos, as some buggy clients do change route set
# during the dialog.
record_route();
}
# route it out to whatever destination was set by loose_route()
# in $du (destination URI).
route(1);
} else {
/* uncomment the following lines if you want to enable presence */
##if (is_method("SUBSCRIBE") && $rd == "your.server.ip.address") {
## # in-dialog subscribe requests
## route(2);
## exit;
##}
if ( is_method("ACK") ) {
if ( t_check_trans() ) {
# non loose-route, but stateful ACK; must be an ACK after
# a 487 or e.g. 404 from upstream server
t_relay();
exit;
} else {
# ACK without matching transaction ->
# ignore and discard
exit;
}
}
sl_send_reply("404","Not here");
}
exit;
}
#initial requests
# CANCEL processing
if (is_method("CANCEL"))
{
if (t_check_trans())
t_relay();
exit;
}
t_check_trans();
# authenticate if from local subscriber (uncomment to enable auth)
# authenticate all initial non-REGISTER request that pretend to be
# generated by local subscriber (domain from FROM URI is local)
##if (!(method=="REGISTER") && from_uri==myself) /*no multidomain version*/
##if (!(method=="REGISTER") && is_from_local()) /*multidomain version*/
##{
## if (!proxy_authorize("", "subscriber")) {
## proxy_challenge("", "0");
## exit;
## }
## if (!check_from()) {
## sl_send_reply("403","Forbidden auth ID");
## exit;
## }
##
## consume_credentials();
## # caller authenticated
##}
# preloaded route checking
if (loose_route()) {
xlog("L_ERR",
"Attempt to route with preloaded Route's [$fu/$tu/$ru/$ci]");
if (!is_method("ACK"))
sl_send_reply("403","Preload Route denied");
exit;
}
# record routing
if (!is_method("REGISTER|MESSAGE"))
record_route();
# account only INVITEs
if (is_method("INVITE")) {
#######################################
if(uri=~"^sip:*@*") {
rewritehostport("172.30.1.110:5060");
}
######################################
setflag(1); # do accounting
}
if (!uri==myself)
## replace with following line if multi-domain support is used
##if (!is_uri_host_local())
{
append_hf("P-hint: outbound\r\n");
# if you have some interdomain connections via TLS
##if($rd=="tls_domain1.net") {
## t_relay("tls:domain1.net");
## exit;
##} else if($rd=="tls_domain2.net") {
## t_relay("tls:domain2.net");
## exit;
##}
route(1);
}
# requests for my domain
## uncomment this if you want to enable presence server
## and comment the next 'if' block
## NOTE: uncomment also the definition of route[2] from below
##if( is_method("PUBLISH|SUBSCRIBE"))
## route(2);
if (is_method("PUBLISH"))
{
sl_send_reply("503", "Service Unavailable");
exit;
}
if (is_method("REGISTER"))
{
# authenticate the REGISTER requests (uncomment to enable auth)
##if (!www_authorize("", "subscriber"))
##{
## www_challenge("", "0");
## exit;
##}
##
##if (!check_to())
##{
## sl_send_reply("403","Forbidden auth ID");
## exit;
##}
##
##if (!check_to())
##{
## sl_send_reply("403","Forbidden auth ID");
## exit;
##}
if (!save("location"))
sl_reply_error();
exit;
}
if ($rU==NULL) {
# request with no Username in RURI
sl_send_reply("484","Address Incomplete");
exit;
}
# apply DB based aliases (uncomment to enable)
##alias_db_lookup("dbaliases");
if (!lookup("location")) {
switch ($retcode) {
case -1:
case -3:
t_newtran();
t_reply("404", "Not Found");
exit;
case -2:
sl_send_reply("405", "Method Not Allowed");
exit;
}
}
# when routing via usrloc, log the missed calls also
setflag(2);
route(1);
}
route[1] {
# for INVITEs enable some additional helper routes
if (is_method("INVITE")) {
t_on_branch("2");
t_on_reply("2");
t_on_failure("1");
}
if (!t_relay()) {
sl_reply_error();
};
exit;
}
# Presence route
/* uncomment the whole following route for enabling presence
NOTE: do not forget to enable the call of this route from the main
route */
##route[2]
##{
## if (!t_newtran())
## {
## sl_reply_error();
## exit;
## };
##
## if(is_method("PUBLISH"))
## {
## handle_publish();
## t_release();
## }
## else
## if( is_method("SUBSCRIBE"))
## {
## handle_subscribe();
## t_release();
## }
##
## exit;
##}
branch_route[2] {
xlog("new branch at $ru\n");
}
onreply_route[2] {
xlog("incoming reply\n");
}
failure_route[1] {
if (t_was_cancelled()) {
exit;
}
# uncomment the following lines if you want to block client
# redirect based on 3xx replies.
##if (t_check_status("3[0-9][0-9]")) {
##t_reply("404","Not found");
## exit;
##}
# uncomment the following lines if you want to redirect the failed
# calls to a different new destination
if (t_check_status("400|486|408")) {
sethostport("172.30.7.54:5060");
## # do not set the missed call flag again
xlog("L_ERR",
"Attempt to route with preloaded Route's [$fu/$tu/$ru/$ci]");
# t_relay();
}
}
fabbricadigitale srl
Pacho Baratta | Senior Systems Engineer
Tecnhology Engineering
-----------------------------
Via A.Volta, 3 - 26041 - Casalmaggiore - CR
Phone +39 0375 284600
Fax +39 02 57760002
mailto:p.baratta at fabbricadigitale.it
www.fabbricadigitale.it<http://www.fabbricadigitale.it/>
From: users-bounces at lists.opensips.org [mailto:users-bounces at lists.opensips.org] On Behalf Of Brett Nemeroff
Sent: lunedì 12 ottobre 2009 17:13
To: OpenSIPS users mailling list
Subject: Re: [OpenSIPS-Users] 404 automatic failover
This is not the right way to do it.
just set the initial hostport, then arm the failure route:
t_on_failure("1");
then t_relay() like normal.
Then setup a failure route:
failure_route[1] {
}
and perform your t_check_status and rewrite etc in there (perform a second rewritehostport) then t_relay again..
This is pretty basic scripting stuff.. I'd encourage you to go over the examples.
-Brett
On Mon, Oct 12, 2009 at 10:03 AM, Pacho Baratta [fabbricadigitale] <P.Baratta at fabbricadigitale.it<mailto:P.Baratta at fabbricadigitale.it>> wrote:
Hi all, i need some help with an issue. i'm quite a newbie, so be patien, please. i need to redirect all calss to a different gateway when the 1st returns a sip404.
my route is like this: if (is_method("INVITE")) {
if(uri=~"^sip:@") {
rewritehostport("172.30.1.110:5060<http://172.30.1.110:5060>");
#
if (tcheckstatus("404")) { sethostport("192.168.2.100:5060<http://192.168.2.100:5060>");
t_relay();
}
#
route(1);
}
but this doesn't seem to work.
can yoi suggest me the right way to do it?
thanks, Pacho
fabbricadigitale srl
Pacho Baratta | Senior Systems Engineer
Tecnhology Engineering
-----------------------------
Via A.Volta, 3 - 26041 - Casalmaggiore - CR
Phone +39 0375 284600
Fax +39 02 57760002
mailto:p.baratta at fabbricadigitale.it
www.fabbricadigitale.it<http://www.fabbricadigitale.it/>
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