[OpenSIPS-Users] OpenSIPS mhomed

[Yuri Kirsanov]

Hi community,

I have following setup:

Public IP (eth0) < OpenSIPS > Private IP (eth1) <------> Private IP (eth0)
Asterisk.

I'm trying to relay all the initial packets received by OpenSIPS to
Asterisk, so I record-route initial packets and process all responses using
loose routing. OpenSIPS is restricted to use only two UDP IP addresses -
private & public ones. It all works fine on SIP layer, I do understand that
I also need RTP proxy, but at this stage I've got strange problem - with
mhomed=1 in configuration file OpenSIPS still sends packets using public IP
address, while Contact, To and Via fields are set correctly, to private IP
address of OpenSIPS. I have tried to use force_send_socket but without any
luck. Could you please help me with this configuration? At least - why does
OpenSIPS uses public IP? Thanks!

Here's my configuration:

####### Global Parameters #########
log_facility=LOG_LOCAL4
fork=yes
children=4
debug=9
disable_tcp=yes
auto_aliases=no
mhomed=1
port=5066
listen=udp:XXX.XXX.XXX.XXX:5066
listen=udp:10.22.10.254:5068

####### Modules Section ########

#set module path
mpath="/opt/opensips/lib64/opensips/modules/"

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

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

# ----- mi_fifo params -----
modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")

# ----- rr params -----
# add value to ;lr param to cope with most of the UAs
modparam("rr", "enable_full_lr", 1)
modparam("rr", "append_fromtag", 1)

# ----- uri params -----
modparam("uri", "use_uri_table", 0)

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

# main request routing logic

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 {
                         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();

        # 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;
        }

        record_route();
        route(1);
}


route[1] {
        rewritehostport("10.22.10.1:6000");
        force_send_socket(10.22.10.254);
        if (!t_relay()) {
                sl_reply_error();
        };
        exit;
}
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