debug=3
log_stderror=yes
log_facility=LOG_LOCAL0

fork=yes
children=4
disable_tcp=yes
auto_aliases=no
sip_warning=yes

listen=udp:EXTERNAL_IP:5060
listen=udp:INTERNAL_IP:5060

mhomed=1


group=nobody
user=nobody

server_header="SBC"
server_signature = off
user_agent_header="User-Agent: SBC"

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

#set module path
mpath="/zxa/server/opensips/lib/modules/"

loadmodule "db_text.so"
loadmodule "signaling.so"
loadmodule "sl.so"
loadmodule "tm.so"
loadmodule "rr.so"
loadmodule "maxfwd.so"
loadmodule "textops.so"
loadmodule "mi_fifo.so"
loadmodule "usrloc.so"
loadmodule "acc.so"
loadmodule "uri.so"
loadmodule "rtpproxy.so"
loadmodule "nat_traversal.so"
loadmodule "nathelper.so"
#loadmodule "userblacklist.so"


modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
#modparam("permissions", "default_allow_file", "/zxa/server/opensips/config/permissions.allow")
modparam("nat_traversal", "keepalive_state_file", "/zxa/server/opensips/config/nat_keepalive_state")
modparam("rr", "append_fromtag", 0)
modparam("uri", "use_uri_table", 0)
modparam("rtpproxy","rtpproxy_sock", "udp:127.0.0.1:7980")
modparam("usrloc", "db_mode", 0)

modparam("acc", "log_level", 2)
modparam("acc", "log_flag", 2)
modparam("acc", "log_facility", "LOG_LOCAL0")
modparam("acc", "report_cancels", 1)
modparam("acc", "detect_direction", 0)
modparam("acc", "failed_transaction_flag", 4)
modparam("acc", "service_type", 15)



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

# main request routing logic

route{

   xlog("=== TOP ===\n");
   xlog("%%%% tu= $tu | fu= $fu | od= $od | ReceivedINT: $Ri | SourceIP: $si %%%\n");

   #if (!check_address("1","$si","$sp","$proto"))
   #{
   #   xlog("=== ACCESS FAILED ===\n");
   #   xlog("=== $si| $sp | $proto ===\n");
   #   sl_send_reply("403","Forbidden A");
   #   exit;
   #}

   if (!mf_process_maxfwd_header("10"))
   {
      xlog("=== TOO MANY HOPS ===\n");
      sl_send_reply("483","Too Many Hops");
      exit;
   }

   #---- NAT Detection ----#
   force_rport();
   if (nat_uac_test("18")) && !($od =~ "^10\.*") {
      xlog("***** NAT YES *****\n");
      fix_nated_contact();
      xlog("fix sdp\n");
      fix_nated_sdp("8","EXTERNAL_IP");
      setflag(5);
   }

   #CANCEL processing
   if (is_method("CANCEL"))
   {
      xlog("=== CANCEL ===\n");
      if (t_check_trans())
      t_relay();
      exit;
   }

   if (is_method("PUBLISH"))
   {
      sl_send_reply("503", "Service Unavailable");
   exit;
   }

   if (has_totag())
   {
      xlog("=== HAS TO TAG ===\n");

      if (loose_route())
      {

         xlog("=== HAS LOOSE ===\n");

         if (is_method("BYE"))
         {
            xlog("=== LOOSE BYE ===\n");
            setflag(1); # Accounting bye

         } else if (is_method("INVITE")) {

            xlog("=== RE-INVITE LOOSE ===\n");

            if( $od =~ "^10\.*")
            {
               xlog("^^^^ DEST INTERNAL ^^^^\n");
               $avp(gw_attrs) = "internal";
            }
            record_route();
         }

         xlog("In loouse going to Route 1\n");
         route(1);

      } else {

         if ( is_method("ACK") )
         {
            xlog("=== LOOSE ELSE ACK ===\n");

            if ( t_check_trans() )
            {
               t_relay();
               exit;
            } else {
               xlog("=== LOOSE Discard ACK ===\n");
               exit;
            }
         }

         sl_send_reply("404","Not here");
      }

      exit;
   }

   t_check_trans();

   if (loose_route())
   {
      xlog("L_ERR","Attempt to route with preloaded Route's [$fu/$tu/$ru/$ci]\n");

      if (!is_method("ACK"))
      {
         sl_send_reply("403","Preload Route denied");
         exit;
      }
   }

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



   if ($rU==NULL)
   {
      # request with no Username in RURI
      sl_send_reply("484","Address Incomplete");
      exit;
   }

   if (is_method("INVITE") && (!has_totag()) )
   {
      xlog("((((((((( NEW CALL ))))))))))\n");



      route(1);

      send_reply("420", "Invalid Extension");
      exit;
   }
}

route[1] {

    rewritehostport("OUTBOUNT SIP");

   #---- RTP Proxy handling ---#
   xlog("=== ROUTE 1 ===\n");


   if (isflagset(5)){
      search_append('Contact:.*sip:[^>[:cntrl:]]*', ';nat=yes');
   }

   if (subst_uri('/(sip:.*);nat=yes/\1/')){
      setbflag(6);
   }

   if (is_method("BYE|CANCEL"))
   {
      unforce_rtp_proxy();
   }

   if (has_body("application/sdp"))
   {

      if ( $avp(gw_attrs) != "internal" )
      {
         append_hf("P-hint: EI \r\n");
         rtpproxy_offer("EI","EXTERNAL_IP");
      } else {
         append_hf("P-hint: IE \r\n");
         rtpproxy_offer("IE","INTERNAL_IP");
      }
   }
   force_send_socket("EXTERNAL_IP");
   t_on_branch("1");
   t_on_reply("1");
   t_on_failure("1");

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

   exit;

}

branch_route[1] {

   xlog("new branch at $ru\n");
}

onreply_route[1] {

   xlog("=== ON REPLY ROUTE 2 rs= $rs | fu= $fu | od= $od | si= $si | Ri= $Ri ===\n");


   if ( status=~"(180)|(183)|(2[0-9][0-9])" )
   {

      if ($Ri == "INTERNAL_IP")
      {
         append_hf("P-hint: RR EI \r\n");
         rtpproxy_answer("EI","EXTERNAL_IP");
      } else {
         append_hf("P-hint: RR IE \r\n");
         rtpproxy_answer("IE","INTERNAL_IP");
      }
   }

   if (isbflagset(6)) {
      fix_nated_contact();
   }
}

failure_route[1] {
   xlog("=== FAIL ROUTE 2 ===\n");

   unforce_rtp_proxy();

   if (t_was_cancelled())
   {
      exit;
   }

}