Hello,
I'm trying to adapt my current Opensips 1.5 installation to use drouting such
that a call will try the least cost route first, and if that gateway is not
available, then it will fail over to the next gateway in the list. I've already
set up Opensips-CP and have made the necessary database modifications, as well
as added the proper loadmodule and modparam blocks for drouting.so, but I'm not
sure how to proceed in the opensips.cfg, and I haven't been able to find any
tutorials that cover this. If someone could point me in the right direction of
a good tutorial, or make recommendations about my opensips.cfg file (routing
portion included below) I would appreciate it.
Thank you!
Justin
########################################################################
# Request route 'main'
########################################################################
route[0]
{
$avp(s:billing_party) = $Au;
$avp(s:can_uri) = $ru;
$avp(s:secs)="7";
xlog("L_INFO", "New request - M=$rm RURI=$ru F=$fu T=$tu IP=$si
ID=$ci\n");
force_rport();
if(msg:len > max_len)
{
xlog("L_INFO", "Message too big - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
sl_send_reply("513", "Message Too Big");
exit;
}
if (!mf_process_maxfwd_header("10"))
{
xlog("L_INFO", "Too many hops - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
sl_send_reply("483", "Too Many Hops");
exit;
}
if(!is_method("REGISTER"))
{
if(nat_uac_test("19"))
{
record_route(";nat=yes");
}
else
{
record_route();
}
}
if(is_method("CANCEL") || is_method("BYE"))
{
#Account BYE transactions
sleep("$avp(s:secs)");
xlog("L_INFO", "SENT TO RADIUS ACCOUNTING");
$avp(s:billing_party) = $Au;
$avp(s:sip_proxy_ip)="38.110.28.140";
$avp(s:can_uri) = $ru;
setflag(25);
setflag(26);
#end_media_session();
}
if(loose_route())
{
if (is_method("BYE")) {
$avp(s:billing_party) = $Au;
$avp(s:can_uri) = $ru;
$avp(s:sip_proxy_ip)="38.110.28.140";
setflag(25);
setflag(26);
}
if(!has_totag())
{
xlog("L_INFO", "Initial loose-routing rejected - M=$rm
RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
sl_send_reply("403", "Initial Loose-Routing Rejected");
exit;
}
if(nat_uac_test("19") || search("^Route:.*;nat=yes"))
{
fix_nated_contact();
setbflag(6);
}
route(3);
}
if(is_method("REGISTER"))
{
route(2);
}
if(is_method("INVITE"))
{
engage_media_proxy();
# Canonical URI
$avp(s:can_uri) = $ru;
$avp(s:billing_party) = $Au;
$avp(s:sip_proxy_ip)="38.110.28.140";
setflag(25);
setflag(26);
setflag(4);
route(4);
}
if(is_method("CANCEL") || is_method("ACK"))
{
# Canonical URI
$avp(s:can_uri) = $ru;
$avp(s:billing_party) = $Au;
$avp(s:sip_proxy_ip)="38.110.28.140";
setflag(25);
setflag(26);
route(8);
}
$avp(s:can_uri) = $ru;
$avp(s:billing_party) = $Au;
$avp(s:sip_proxy_ip)="38.110.28.140";
setflag(25);
setflag(26);
route(9);
}
########################################################################
# Request route 'stop-media-proxy'
########################################################################
route[1]
{
if(isflagset(22))
{
#end_media_session();
}
}
########################################################################
# Request route 'base-route-register'
########################################################################
route[2]
{
sl_send_reply("100", "Trying");
if(!www_authorize("", "subscriber"))
{
xlog("L_INFO", "Register authentication failed - M=$rm RURI=$ru
F=$fu T=$tu IP=$si ID=$ci\n");
www_challenge("", "0");
exit;
}
if(!check_to())
{
xlog("L_INFO", "Spoofed To-URI detected - M=$rm RURI=$ru F=$fu
T=$tu IP=$si ID=$ci\n");
sl_send_reply("403", "Spoofed To-URI Detected");
exit;
}
consume_credentials();
if(!search("^Contact:[ ]*\*") && nat_uac_test("19"))
{
fix_nated_register();
setbflag(6);
}
if(!save("location"))
{
xlog("L_ERR", "Saving contact failed - M=$rm RURI=$ru F=$fu
T=$tu IP=$si ID=$ci\n");
sl_reply_error();
exit;
}
xlog("L_INFO", "Registration successful - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
exit;
}
########################################################################
# Request route 'base-outbound'
########################################################################
route[3]
{
if(isbflagset(6))
{
if(!isflagset(22) && !search("^Content-Length:[ ]*0"))
{
setflag(22);
#use_media_proxy();
}
t_on_reply("2");
}
else
{
t_on_reply("1");
}
if(!isflagset(21))
{
t_on_failure("2");
}
if(isflagset(29))
{
append_branch();
}
if(is_present_hf("Proxy-Authorization"))
{
consume_credentials();
}
xlog("L_INFO", "Request leaving server, D-URI='$du' - M=$rm RURI=$ru
F=$fu T=$tu IP=$si ID=$ci\n");
# no 100 (we already sent it) and no DNS blacklisting
if(!t_relay("0x05"))
{
sl_reply_error();
if(is_method("INVITE") && isbflagset(6))
{
#end_media_session();
}
}
exit;
}
########################################################################
# Request route 'base-route-invite'
########################################################################
route[4]
{
sl_send_reply("100", "Trying");
if(from_gw())
{
xlog("L_INFO", "Call from PSTN' - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
setflag(23);
}
else
{
if(allow_trusted())
{
xlog("L_INFO", "Call from trusted peer - M=$rm RURI=$ru
F=$fu T=$tu IP=$si ID=$ci\n");
if(!is_domain_local("$rd"))
{
xlog("L_INFO", "Rejecting peering attempt with
non-local request domain - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
sl_send_reply("403", "Relaying Denied");
exit;
}
setflag(23);
}
else
{
if(!proxy_authorize("", "subscriber"))
{
xlog("L_INFO", "Proxy authentication failed -
M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
proxy_challenge("", "0");
exit;
}
# if(!check_from())
# {
# xlog("L_INFO", "Spoofed From-URI detected -
M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
# sl_send_reply("403", "Spoofed From-URI
Detected");
# exit;
# }
}
}
if(nat_uac_test("19"))
{
fix_nated_contact();
setbflag(6);
}
route(5);
}
########################################################################
# Request route 'invite-find-callee'
########################################################################
route[5]
{
if(alias_db_lookup("dbaliases"))
{
xlog("L_INFO", "Callee was aliased - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
}
if(!is_domain_local("$rd"))
{
setflag(20);
route(7);
}
if(does_uri_exist())
{
xlog("L_INFO", "Callee is local - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
route(6);
}
else
{
xlog("L_INFO", "Callee is not local - M=$rm RURI=$ru F=$fu
T=$tu IP=$si ID=$ci\n");
route(7);
}
exit;
}
########################################################################
# Request route 'invite-to-internal'
########################################################################
route[6]
{
if(!lookup("location"))
{
xlog("L_INFO", "Local user offline - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
sl_send_reply("404", "User Offline");
}
else
{
xlog("L_INFO", "Local user online - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
route(3);
}
exit;
}
########################################################################
# Request route 'invite-to-external'
########################################################################
route[7]
{
if(isflagset(20))
{
xlog("L_INFO", "Call to foreign domain - M=$rm RURI=$ru F=$fu
T=$tu IP=$si ID=$ci\n");
route(3);
exit;
}
if(!isflagset(23))
{
# don't allow calls relaying from PSTN to PSTN, if not
explicitely forwarded
if(uri =~ "^sip:[0-9]+@")
{
# only route numeric users to PSTN
if(!load_gws())
{
xlog("L_ERR", "Error loading PSTN gateways -
M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
sl_send_reply("503", "PSTN Termination
Currently Unavailable");
exit;
}
if(!next_gw())
{
xlog("L_ERR", "No PSTN gateways available -
M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
sl_send_reply("503", "PSTN Termination
Currently Unavailable");
exit;
}
setflag(21);
t_on_failure("1");
route(3);
}
}
xlog("L_INFO", "Call to unknown user - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
sl_send_reply("404", "User Not Found");
exit;
}
########################################################################
# Request route 'base-route-local'
########################################################################
route[8]
{
t_on_reply("1");
if(t_check_trans())
{
xlog("L_INFO", "Request leaving server - M=$rm RURI=$ru F=$fu
T=$tu IP=$si ID=$ci\n");
if(!t_relay())
{
sl_reply_error();
}
}
else
{
xlog("L_INFO", "Dropping mis-routed request - M=$rm RURI=$ru
F=$fu T=$tu IP=$si ID=$ci\n");
}
exit;
}
########################################################################
# Request route 'base-route-generic'
########################################################################
route[9]
{
xlog("L_INFO", "Method not supported - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
sl_send_reply("501", "Method Not Supported Here");
exit;
}
########################################################################
# Request route 'base-filter-failover'
########################################################################
route[10]
{
if(!t_check_status("408|500|503"))
{
xlog("L_INFO", "No failover routing needed for this response
code - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
route(1);
exit;
}
}
########################################################################
# Reply route 'base-standard-reply'
########################################################################
onreply_route[1]
{
xlog("L_INFO", "Reply - S=$rs D=$rr F=$fu T=$tu IP=$si ID=$ci\n");
exit;
}
########################################################################
# Reply route 'base-nat-reply'
########################################################################
onreply_route[2]
{
xlog("L_INFO", "NAT-Reply - S=$rs D=$rr F=$fu T=$tu IP=$si ID=$ci\n");
if(nat_uac_test("1"))
{
fix_nated_contact();
}
if(isbflagset(6) && status=~"(180)|(183)|2[0-9][0-9]")
{
if(!search("^Content-Length:[ ]*0"))
{
#use_media_proxy();
}
}
exit;
}
########################################################################
# Failure route 'pstn-failover'
########################################################################
failure_route[1]
{
xlog("L_INFO", "Failure route for PSTN entered - M=$rm RURI=$ru F=$fu
T=$tu IP=$si ID=$ci\n");
route(10);
if(!next_gw())
{
xlog("L_ERR", "Failed to select next PSTN gateway - M=$rm
RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
route(1);
exit;
}
t_on_failure("1");
route(3);
}
########################################################################
# Failure route 'base-standard-failure'
########################################################################
failure_route[2]
{
route(10);
route(1);
}
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