# OpenSIPS SIP-XMPP Gateway

debug=3
log_stderror=no
log_facility=LOG_LOCAL0

fork=yes
children=4

listen=udp:10.10.10.10:5060
alias="sip.domain.com"

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

mpath="/usr/local/lib/opensips/modules/"

loadmodule "db_mysql.so"
loadmodule "textops.so"
loadmodule "maxfwd.so"
loadmodule "rr.so"
loadmodule "sl.so"
loadmodule "tm.so"
loadmodule "signaling.so"
loadmodule "usrloc.so"
loadmodule "registrar.so"
loadmodule "mi_fifo.so"
loadmodule "uri.so"

loadmodule "xmpp.so"
loadmodule "pua.so"
loadmodule "pua_xmpp.so"
loadmodule "presence.so"
loadmodule "presence_xml.so"

# ----------------- setting module-specific parameters ---------------
modparam("usrloc|presence|presence_xml|pua", "db_url",  "mysql://opensips:opensipsrw@localhost/opensips")
modparam("presence|pua_xmpp", "server_address", "sip:sa@10.10.10.10:5060")
modparam("presence_xml", "force_active", 1)
modparam("pua_xmpp", "presence_server", "sip:sa@10.10.10.10:5060")

modparam("xmpp", "xmpp_domain", "sip.domain.com")  # the name that OpenSIPS will register with as a component to the jabber server
modparam("xmpp", "xmpp_host", "xmpp.domain.com")   # the location of the jabber server
modparam("xmpp", "sip_domain", "sip.domain.com")   # the domain of the sip users visible to the xmpp users 
modparam("xmpp", "backend", "component")
modparam("xmpp", "outbound_proxy", "sip:10.10.10.10:5060")

modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
modparam("usrloc", "db_mode", 2)

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|NOTIFY")) {
            ##  # 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 (!db_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;
    }
  
    # handle initial presence messages
    if(uri==myself || uri=~"sip:.+gmail.com" || uri=~"sip:.+@xmpp.domain.com") # detect if it's for an XMPP user
    {
        if( is_method("PUBLISH|SUBSCRIBE"))
            route(2);
    };

    # handle xmpp messages
    if(is_method("MESSAGE") && (uri=~"sip:.+gmail.com" || uri=~"sip:.+@xmpp.domain.com"))
    {
        if(!t_newtran())
        {
            sl_reply_error();
            exit;
        }
        if (xmpp_send_message()) {
            t_reply("200", "Accepted");
        } else {
            t_reply("404", "Not found");
        }
        exit;
    };

    # record routing
    if (!is_method("REGISTER|MESSAGE"))
        record_route();

    # account only INVITEs
    if (is_method("INVITE")) {
        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

    if (is_method("REGISTER"))
    {
        # authenticate the REGISTER requests (uncomment to enable auth)
        ##if (!www_authorize("", "subscriber"))
        ##{
        ##  www_challenge("", "0");
        ##  exit;
        ##}
        ##
        ##if (!db_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");

    # do lookup with method filtering
    if (!lookup("location","m")) {
        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] {
    # send it out now; use stateful forwarding as it works reliably
    # even for UDP2TCP

    if (!t_relay()) {
        sl_reply_error();
    };
    exit;
}

route[2] {
    # create new transaction to catch retransmissions
    if(!t_newtran())
    {
        sl_reply_error();
        exit;
    }

    # if it is Notify - for xmpp gateway
    if( is_method("NOTIFY"))
    {
        t_reply("200", "OK");
        pua_xmpp_notify();
        exit;
    }

    # handle presence specific messages
    if(is_method("PUBLISH"))
    {
        handle_publish();
    }
    else
    if(is_method("SUBSCRIBE"))
    {
        handle_subscribe();
        if($hdr(Event)== "presence" && (uri=~"sip:.+gmail.com" || uri=~"sip:.+@xmpp.domain.com") )
            pua_xmpp_req_winfo("$ruri", "$hdr(Expires)");
    }
    exit;
}