#
# OpenSIPS residential configuration script
#     by OpenSIPS Solutions <team@opensips-solutions.com>
#
# This script was generated via "make menuconfig", from
#   the "Residential" scenario.
# You can enable / disable more features / functionalities by
#   re-generating the scenario with different options.#
#
# Please refer to the Core CookBook at:
#      https://opensips.org/Resources/DocsCookbooks
# for a explanation of possible statements, functions and parameters.
#


####### Global Parameters #########

/* uncomment the following lines to enable debugging */
#debug_mode=yes

log_level=3
xlog_level=3
log_stderror=yes
log_stdout=yes
log_facility=LOG_LOCAL0

udp_workers=4

/* uncomment the next line to enable the auto temporary blacklisting of 
   not available destinations (default disabled) */
#disable_dns_blacklist=no

/* uncomment the next line to enable IPv6 lookup after IPv4 dns
   lookup failures (default disabled) */
#dns_try_ipv6=yes


socket=udp:ICSCF_IP:4060
socket=tcp:ICSCF_IP:4060

alias="icscf.IMS_DOMAIN"

#set module path
mpath="/usr/lib/x86_64-linux-gnu/opensips/modules"

####### Modules Section ########
####### http module ######
loadmodule "httpd.so"

modparam("httpd", "ip", "ICSCF_IP")
modparam("httpd", "port", 8080)


#### SIGNALING module
loadmodule "signaling.so"

#### StateLess module
loadmodule "sl.so"

#### Transaction Module
loadmodule "tm.so"
modparam("tm", "fr_timeout", 5)
modparam("tm", "fr_inv_timeout", 30)
modparam("tm", "restart_fr_on_each_reply", 0)
modparam("tm", "onreply_avp_mode", 1)

#### Record Route Module
loadmodule "rr.so"
/* do not append from tag to the RR (no need for this script) */
modparam("rr", "append_fromtag", 0)

#### MAX ForWarD module
loadmodule "maxfwd.so"

#### SIP MSG OPerationS module
loadmodule "sipmsgops.so"

#### FIFO Management Interface
loadmodule "mi_fifo.so"
modparam("mi_fifo", "fifo_name", "/run/opensips/opensips_fifo")
modparam("mi_fifo", "fifo_mode", 0666)

#### USeR LOCation module
loadmodule "usrloc.so"
modparam("usrloc", "nat_bflag", "NAT")
modparam("usrloc", "working_mode_preset", "single-instance-no-db")

#### REGISTRAR module
loadmodule "registrar.so"
modparam("registrar", "tcp_persistent_flag", "TCP_PERSISTENT")
/* uncomment the next line not to allow more than 10 contacts per AOR */
#modparam("registrar", "max_contacts", 10)

#### ACCounting module
loadmodule "acc.so"
/* what special events should be accounted ? */
modparam("acc", "early_media", 0)
modparam("acc", "report_cancels", 0)
/* by default we do not adjust the direct of the sequential requests.
   if you enable this parameter, be sure to enable "append_fromtag"
   in "rr" module */
modparam("acc", "detect_direction", 0)

loadmodule "proto_udp.so"
loadmodule "proto_tcp.so"

#### aaa_diameter module
loadmodule "aaa_diameter.so"
modparam("aaa_diameter", "fd_log_level", 1) # max amount of logging, quite annoying
modparam("aaa_diameter", "realm", "IMS_DOMAIN")
modparam("aaa_diameter", "peer_identity", "hss")
modparam("aaa_diameter", "aaa_url",
	"diameter:/etc/opensips/freeDiameter.conf;extra-avps-file:/etc/opensips/icscf.dictionary")

#### JSON module
loadmodule "json.so"



####### Routing Logic ########

# main request routing logic

route{
	xlog("L_INFO", "[$ci] Start route time [$Tf] method ($rm) r-uri ($ru) \n");

	if (!mf_process_maxfwd_header(10)) {
		send_reply(483,"Too Many Hops");
		exit;
	}

	if (has_totag()) {

		# handle hop-by-hop ACK (no routing required)
		if ( is_method("ACK") && t_check_trans() ) {
			t_relay();
			exit;
		}

		# sequential request within a dialog should
		# take the path determined by record-routing
		if ( !loose_route() ) {
			# we do record-routing for all our traffic, so we should not
			# receive any sequential requests without Route hdr.
			send_reply(404,"Not here");
			exit;
		}

		if (is_method("BYE")) {
			# do accounting even if the transaction fails
			do_accounting("log","failed");
		}

		# route it out to whatever destination was set by loose_route()
		# in $du (destination URI).
		route(relay);
		exit;
	}

	# CANCEL processing
	if (is_method("CANCEL")) {
		if (t_check_trans())
			t_relay();
		exit;
	}

	# absorb retransmissions, but do not create transaction
	t_check_trans();

	if (is_method("REGISTER")) {
		xlog("L_INFO", "[$ci] Received REGISTER for $tu - doing UAR\n");

		$var(payload) = "[
			{ \"Session-Id\": \"icscf.IMS_DOMAIN;"+$Ts+"."+$Tsm+";"+$pp+"\" },
			{ \"Origin-Host\": \"icscf.IMS_DOMAIN\" },
			{ \"Origin-Realm\": \"IMS_DOMAIN\" },
			{ \"Destination-Realm\": \"IMS_DOMAIN\" },
			{ \"Vendor-Specific-Application-Id\": [{\"Vendor-Id\": 10415},
				{\"Auth-Application-Id\": 16777216}]},
			{ \"Auth-Session-State\": 1 },
			{ \"User-Name\": \""+$fU+"@"+$fd+"\" },
			{ \"Public-Identity\": \""+$fu+"\" },
			{ \"Visited-Network-Identifier\": \"IMS_DOMAIN\" }
		]";

		$var(rc) = dm_send_request(16777216, 300, $var(payload), $var(rpl_avps));
		xlog("[$ci] UAA rc: $var(rc), UAA AVPs: $var(rpl_avps)\n");

		$var(server_name) = NULL;
		$json(rpl_avps) := $var(rpl_avps);
		for ($var(item) in $(json(rpl_avps)[*])) {
			$json(item) := $var(item);
			for ($var(key) in $(json(item.keys)[*])) {
				if ($var(key) == "Server-Name") {
					$var(server_name) = $json(item/$var(key));
					break;
				}
			}
			if ($var(server_name) != NULL)
				break;
		}

		if ($var(server_name) == NULL) {
			xlog("L_ERR", "[$ci] No server available!\n");
			send_reply(503,"Not available");
			exit;
		}

		# relay to S-CSCF
		xlog("L_INFO", "[$ci] using S-CSCF $var(server_name)\n");
		$ru = $var(server_name);

		route(relay);
		exit;
	}

	send_reply(503,"Not Implemented");
	exit;
}


route[relay] {
	if (!t_relay()) {
		send_reply(500,"Internal Error");
	}
	exit;
}