xmpp Module

This module is a gateway between Kamailio and a XMPP/Jabber server. It enables the exchange of instant messages between SIP clients and XMPP(jabber) clients.

The module can be used in two different modes:

In the component mode, you need a local XMPP server (recommended Jabberd2). The XMPP module will connect by using TCP/IP connection to the local jabber server. The documentation and the source for Jabberd server are located at the following link: http://jabberd.jabberstudio.org/2/#download

After you have a running XMPP server, what you need to do is set the following parameters in the Kamailio configuration file:

 	 ### ---8<--- cut here ---8<--- ###
	if ($rd =="sip-xmpp.kamailio.org") {
		if (!t_newtran()) {
			sl_reply_error();
	...........	

A use case, for the component-mode, would look like this:

In the XMPP stand-alone server mode, the XMPP module is a minimal XMPP/Jabber server. In this mode, another Jabber server is not needed. The gateway will connect to other XMPP servers basaed on the JID domain and by using the standardized XMPP S2S protocol.

If you want to change to server-mode, you have to change the "backend" parameter, as shown in the Exported Parameters section, from "component" to "server".

A use case, for the server-mode, would look like this:

Unless 'gwmap' parameter is set, in both modes (server or component), the destination address must have the same pattern:

“sip:username<delim>jabber_server@gateway_domain”

From a jabber client's point of view, the destination will look like:

“sip_username<delim>sip_domain@xmpp_domain”

'delim' is a character that can be set via 'domain_separator' parameter.

If 'gwmap' parameter is used, then the addresses are not enconding the domains in the username part. They are going to be straight 'username@domain' always.

Next is presented a sample configuration file one can use to implement a standalone SIP-to-XMPP gateway. You can run an instance of Kamailio on a separate machine or on different port with the following config, and have the main SIP server configured to forward all SIP requests for XMPP world to it.

....
#
# $Id$
#
# simple quick-start config script for XMPP GW
#
# make sure in your main SIP server that you send
# only the adequate SIP MESSAGES to XMPP GW
#
#
# ----------- global configuration parameters ------------------------

debug=9            # debug level (cmd line: -dddddddddd)
fork=no
log_stderror=yes    # (cmd line: -E)

/* Uncomment these lines to enter debugging mode 
fork=no
log_stderror=yes
*/

check_via=no	# (cmd. line: -v)
dns=no          # (cmd. line: -r)
rev_dns=no      # (cmd. line: -R)
children=4

listen=udp:10.10.10.10:5076
alias=sip-xmpp.kamailio.org

# ------------------ module loading ----------------------------------

mpath="/usr/local/lib/kamailio/modules/"
loadmodule "sl.so"
loadmodule "tm.so"
loadmodule "rr.so"
loadmodule "maxfwd.so"
loadmodule "textops.so"
loadmodule "mi_fifo.so"


# XMPP
loadmodule "xmpp.so"

modparam("xmpp", "domain_separator", "*")
modparam("xmpp", "gateway_domain", "sip-xmpp.kamailio.org")
modparam("xmpp", "xmpp_domain", "xmpp-sip.kamailio.org")
modparam("xmpp", "xmpp_host", "xmpp.kamailio.org")

modparam("xmpp", "backend", "server")
# modparam("xmpp", "backend", "component")

# ----------------- setting module-specific parameters ---------------

# -- mi_fifo params --

modparam("mi_fifo", "fifo_name", "/tmp/kamailio_fifo_xmpp")

# -- usrloc params --

# -- rr params --
# add value to ;lr param to make some broken UAs happy
modparam("rr", "enable_full_lr", 1)

# -------------------------  request routing logic -------------------

# main routing logic

route{

	# initial sanity checks -- messages with
	# max_forwards==0, or excessively long requests
	if (!mf_process_maxfwd_header("10")) {
		sl_send_reply("483","Too Many Hops");
		exit;
	};

	if (msg:len >=  2048 ) {
		sl_send_reply("513", "Message too big");
		exit;
	};

	### absorb retransmissions ###
	if (!t_newtran()) {
		sl_reply_error();
		return;
	}
	if (method == "MESSAGE") {
		log("*** xmpp-handled MESSAGE message.\n");
		if (xmpp_send_message()) {
			t_reply("200", "Accepted");
		} else {
			t_reply("404", "Not found");
		}
		return;
	}
		
	log("*** xmpp: unhandled message type\n");
	t_reply("503", "Service unavailable");
	return;
}


....