# Load required modules
loadmodule "tm.so"
loadmodule "sl.so"
loadmodule "rr.so"
loadmodule "maxfwd.so"
loadmodule "textops.so"
loadmodule "rtpengine.so"
loadmodule "dispatcher.so"
loadmodule "nathelper.so"
loadmodule "ctl"
loadmodule "pv"
loadmodule "db_mysql.so"
loadmodule "uac.so"
loadmodule "xlog.so"
loadmodule "tmx"
loadmodule "siputils"
loadmodule "sanity"
loadmodule "acc"

# Global parameters
cfgengine "native"
fork=yes
children=4
log_facility=LOG_LOCAL0
# RTPProxy settings
modparam("rtpengine", "rtpengine_sock", "udp:127.0.0.1:2223")
# Dispatcher settings
modparam("dispatcher", "list_file", "/etc/kamailio/dispatcher.list")
# KAMCTL config
modparam("ctl", "binrpc", "/var/run/kamailio/kamailio_ctl")
# UAC settings
modparam("uac","reg_contact_addr", "10.0.5.7:5060")
modparam("uac","reg_db_url", "mysql://kamailio:kamailiow@localhost/kamailio")
modparam("uac","auth_username_avp","$avp(auser)")
modparam("uac","auth_password_avp","$avp(apass)")
modparam("uac","auth_realm_avp","$avp(arealm)")

# TM settings
modparam("tm", "auto_inv_100_reason", "Trying")

/* Main SIP request routing logic
 * - processing of any incoming SIP request starts with this route
 * - note: this is the same as route { ... } */
request_route {
	# per request initial checks
	route(REQINIT);

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

	# handle retransmissions
	if (!is_method("ACK")) {
		if(t_precheck_trans()) {
			t_check_trans();
			exit;
		}
		t_check_trans();
	}

	# handle requests within SIP dialogs
	route(WITHINDLG);

	### only initial requests (no To tag)

	# record routing for dialog forming requests (in case they are routed)
	# - remove preloaded route headers
	remove_hf("Route");
	if (is_method("INVITE|SUBSCRIBE")) {
		record_route();
	}

	if ($rU==$null) {
		# request with no Username in RURI
		sl_send_reply("484", "Address Incomplete");
		exit;
	}
	# Force RTPENGINE
	    if (is_method("INVITE")) {
        rtpengine_manage("replace-origin replace-session-connection force-relay");
	}
	# update $du to set the destination address for proxying
	if ($siz=="10.0.5.7") {
		xlog("Incomming call from SIP provider");
		$du = "sip:" + "10.0.5.4";
	} else {
		xlog("Incomming call from Customer PBX");
		$du = "sip:" + "10.0.5.7";
	}
	route(RELAY);
	exit;
}

# Wrapper for relaying requests
route[RELAY] {

	# enable additional event routes for forwarded requests
	# - serial forking, RTP relaying handling, a.s.o.
	if (is_method("INVITE|BYE|SUBSCRIBE|UPDATE")) {
		if(!t_is_set("branch_route")) t_on_branch("MANAGE_BRANCH");
	}
	if (is_method("INVITE|SUBSCRIBE|UPDATE")) {
		if(!t_is_set("onreply_route")) t_on_reply("MANAGE_REPLY");
	}
	if (is_method("INVITE")) {
		if(!t_is_set("failure_route")) t_on_failure("MANAGE_FAILURE");
	}
	t_on_failure("TRUNKAUTH");
	t_relay();
	exit;
}

# TRUNK AUTH ROUTE
failure_route[TRUNKAUTH] {
    xlog("trunk auth");
    if (t_is_canceled()) {
        exit;
    }
	xlog("Checking status code");
    if(t_check_status("401|407")) {
	xlog("status code is valid auth challenge");
        $avp(auser) = "kam";
        $avp(apass) = "kam";
        uac_auth();
	xlog("after uac_auth");
        t_relay();
        exit;
    }
}

# Per SIP request initial checks
route[REQINIT] {
	if($ua =~ "friendly-scanner|sipcli|VaxSIPUserAgent") {
		# silent drop for scanners - uncomment next line if want to reply
		# sl_send_reply("200", "OK");
		exit;
	}

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

	if(is_method("OPTIONS") && uri==myself && $rU==$null) {
		sl_send_reply("200", "Keepalive");
		exit;
	}

	if(!sanity_check("1511", "7")) {
		xlog("Malformed SIP message from $si:$sp\n");
		exit;
	}
}

# Handle requests within SIP dialogs
route[WITHINDLG] {
	if (!has_totag()) return;

	# sequential request within a dialog should
	# take the path determined by record-routing
	if (loose_route()) {
		if (is_method("BYE")) {
		rtpengine_delete();
		route(RELAY);
		exit;
		} else if ( is_method("NOTIFY") ) {
			# Add Record-Route for in-dialog NOTIFY as per RFC 6665.
			record_route();
		}
		route(RELAY);
		exit;
	}

	if ( is_method("ACK") ) {
		if ( t_check_trans() ) {
			# no loose-route, but stateful ACK;
			# must be an ACK after a 487
			# or e.g. 404 from upstream server
			route(RELAY);
			exit;
		} else {
			# ACK without matching transaction ... ignore and discard
			exit;
		}
	}
	sl_send_reply("404", "Not here");
	exit;
}

# Manage outgoing branches
branch_route[MANAGE_BRANCH] {
	xdbg("new branch [$T_branch_idx] to $ru\n");
}

# Manage incoming replies
onreply_route[MANAGE_REPLY] {
    if (is_method("INVITE")) {
        # Force RTP relay on reply
        rtpengine_manage("force-relay");
	xdbg("incoming reply\n");
	}
}

# Manage failure routing cases
failure_route[MANAGE_FAILURE] {
	if (t_is_canceled()) exit;
}