Hi,

 

I started working on IPv4/IPv6 Translation issue in Kamailio by using rtpproxy as Media relay last year in my Bachelor-project.

I solved the trouble with Translation between IPv4 and IPv6 clients, where IPv4 client used public IPv4 address. Now I am working on the issue, where

IPv4 client uses private IPv4 (is behind NAT in local network), so I have to provide IPv4/v6 and NAT for all messages in one call. 

 

My topology consists of:

Kamailio 3.3.4 - SIPproxy (supports IPv4/IPv6, public IPv4 and IPv6 addresses) - makes NAT translation, works as SIPoutbound proxy and communicates with rtpproxy (v1.2.1), 

Kamailio 3.3.4 - SIPprotocol GW (== SIP bridge) - translates IPv4 messages to IPv6 (and IPv6 to IPv4), uses other rtpproxy, has public IPv4 and IPv6 addresses

+ only IPv4 and only IPv6 clients (Linphone v3.5.2)

 

I assume, that both (IPv4 and IPv6) clients are in the same SIP domain.

I solve IPv4-IPv6 translation so, that each message from IPv6 client goes to SIP proxy and (if needed) is forwarded to SIP Protocol GW. Translated medssage is then forwarded back to SIP proxy and from that to callee.                                       

 

Here i have some problems:

-1.) IPv6 client doesnt respond to invites from IPv4 client. The messages are ignored at IPv6 client.

 

-2.) Rtpproxy on the machine with SIP protocol gateway (which provides IPv4/v6 translation) removes session earlier than I need (usually after 30 seconds of call) and the result is call break.

this issue doesnt appear for rtpproxy on SIP proxy. I dont know what causes this behavior, if it is only in some parameters, witch i have to set, or it is bug in rtpproxy or .... 

 

Here I get config files of topology entities:

 

-----------------------------------------------------------------------------------------------------------------------------

config file for SIP proxy:

----------------------------------------------------------------------------------------------------------------------------- 

#!KAMAILIO

# Konfiguracny subor pre SIP Proxy Server IPv4/IPv6 pre konkretnu domenu ip02.sip.uniza.sk

#

#!ifdef ACCDB_COMMENT

  ALTER TABLE acc ADD COLUMN src_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN src_domain VARCHAR(128) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN src_ip varchar(64) NOT NULL default '';

  ALTER TABLE acc ADD COLUMN dst_ouser VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN dst_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN dst_domain VARCHAR(128) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN src_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN src_domain VARCHAR(128) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN src_ip varchar(64) NOT NULL default '';

  ALTER TABLE missed_calls ADD COLUMN dst_ouser VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN dst_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN dst_domain VARCHAR(128) NOT NULL DEFAULT '';

#!endif

 

####### Defined Values #########

#!define WITH_MYSQL

#!define WITH_AUTH

#!define WITH_USERLOCDB

#!define WITH_ALIASDB

#!define WITH_NAT

 

#>>

#!define WITH_IPV6

#!define WITH_V4V6

 

#!ifdef WITH_V4V6

#!define BRIDGE_IP4 "158.193.139.207"

#!define BRIDGE_IP6 "[2001:4118:300:122:a00:27ff:fe60:83c]"

#!endif

#<<

 

#!define ADDR_IP4 158.193.139.46

 

#!ifdef WITH_IPV6

#!define ADDR_IP6 [2001:4118:300:122:444a:3fff:fecc:61a0] 

#!endif

 

# *** Value defines - IDs used later in config

#!ifdef WITH_MYSQL

# - database URL - used to connect to database server by modules such

#       as: auth_db, acc, usrloc, a.s.o.

#!define DBURL "mysql://openser:openserrw@localhost/openser"

#!endif

#!ifdef WITH_MULTIDOMAIN

# - the value for 'use_domain' parameters

#!define MULTIDOMAIN 1

#!else

#!define MULTIDOMAIN 0

#!endif

 

# - flags

#   FLT_ - per transaction (message) flags

# FLB_ - per branch flags

#!define FLT_ACC 1

#!define FLT_ACCMISSED 2

#!define FLT_ACCFAILED 3

#!define FLT_NATS 5

 

#!define FLB_NATB 1 

#!define FLB_NATSIPPING 2

 

#>>

#!define FLB_IPV6 6

#!define FLB_V4V6 7

#<<

####### Global Parameters #########

 

#!ifdef WITH_DEBUG

debug=4

log_stderror=yes

#!else

debug=2

log_stderror=no

#!endif

 

memdbg=5

memlog=5

 

log_facility=LOG_LOCAL0

 

fork=yes

children=4

 

/* uncomment the next line to disable TCP (default on) */

#disable_tcp=yes

 

/* uncomment the next line to disable the auto discovery of local aliases

   based on reverse DNS on IPs (default on) */

#auto_aliases=no

 

/* add local domain aliases */

alias="ip02.sip.uniza.sk"

alias="[2001:4118:300:122:444a:3fff:fecc:61a0]" 

alias="158.193.139.46"

 

#!ifdef WITH_IPV6

listen=udp:158.193.139.46:5060

listen=udp:[2001:4118:300:122:444a:3fff:fecc:61a0]:5060

listen=tcp:158.193.139.46:5060

listen=tcp:[2001:4118:300:122:444a:3fff:fecc:61a0]:5060

 

#!else

/* uncomment and configure the following line if you want Kamailio to 

   bind on a specific interface/port/proto (default bind on all available) */

#listen=udp:10.0.0.10:5060

#!endif

 

/* port to listen to

 * - can be specified more than once if needed to listen on many ports */

port=5060

 

#!ifdef WITH_TLS

enable_tls=yes

#!endif

 

# life time of TCP connection when there is no traffic

# - a bit higher than registration expires to cope with UA behind NAT

tcp_connection_lifetime=3605

 

####### Custom Parameters #########

 

# These parameters can be modified runtime via RPC interface

# - see the documentation of 'cfg_rpc' module.

#

# Format: group.id = value 'desc' description

# Access: $sel(cfg_get.group.id) or @cfg_get.group.id

#

 

#!ifdef WITH_PSTN

# PSTN GW Routing

#

# - pstn.gw_ip: valid IP or hostname as string value, example:

# pstn.gw_ip = "10.0.0.101" desc "My PSTN GW Address"

#

# - by default is empty to avoid misrouting

pstn.gw_ip = "" desc "PSTN GW Address"

#!endif

 

#!ifdef WITH_VOICEMAIL

# VoiceMail Routing on offline, busy or no answer

#

# - by default Voicemail server IP is empty to avoid misrouting

voicemail.srv_ip = "" desc ""

voicemail.srv_port = "" desc ""

#!endif

 

#>>

#!ifdef WITH_V4V6

bridge.srv_ip4 = "" desc "SIPv64 PGW IPv4 Address"

bridge.srv_ip6 = "" desc "SIPv64 PGW IPv6 Address"

#!endif

#<<

 

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

 

# set paths to location of modules (to sources or installation folders)

#!ifdef WITH_SRCPATH

mpath="modules_k:modules"

#!else

mpath="/usr/lib/kamailio/modules_k/:/usr/lib/kamailio/modules/"

#!endif

 

#!ifdef WITH_MYSQL

loadmodule "db_mysql.so"

#!endif

 

loadmodule "mi_fifo.so"

loadmodule "kex.so"

loadmodule "tm.so"

loadmodule "tmx.so"

loadmodule "sl.so"

loadmodule "rr.so"

loadmodule "pv.so"

loadmodule "maxfwd.so"

loadmodule "usrloc.so"

loadmodule "registrar.so"

loadmodule "textops.so"

loadmodule "siputils.so"

loadmodule "xlog.so"

loadmodule "sanity.so"

loadmodule "ctl.so"

loadmodule "cfg_rpc.so"

loadmodule "mi_rpc.so"

loadmodule "acc.so"

 

#>>

#!ifdef WITH_V4V6

loadmodule "ipops.so"

loadmodule "exec.so"

#!endif

#<<

 

#!ifdef WITH_AUTH

loadmodule "auth.so"

loadmodule "auth_db.so"

 

#!ifdef WITH_IPAUTH

loadmodule "permissions.so"

#!endif

#!endif

 

#!ifdef WITH_ALIASDB

loadmodule "alias_db.so"

#!endif

 

#!ifdef WITH_SPEEDDIAL

loadmodule "speeddial.so"

#!endif

 

#!ifdef WITH_MULTIDOMAIN

loadmodule "domain.so"

#!endif

 

#!ifdef WITH_PRESENCE

loadmodule "presence.so"

loadmodule "presence_xml.so"

#!endif

 

#!ifdef WITH_NAT

loadmodule "nathelper.so"

loadmodule "rtpproxy.so"

#!endif

 

#!ifdef WITH_TLS

loadmodule "tls.so"

#!endif

 

#!ifdef WITH_ANTIFLOOD

loadmodule "htable.so"

loadmodule "pike.so"

#!endif

 

#!ifdef WITH_XMLRPC

loadmodule "xmlrpc.so"

#!endif

 

#!ifdef WITH_DEBUG

loadmodule "debugger.so"

#!endif

 

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

 

#>>

# ----- xlog params -----

modparam("xlog", "prefix", "ProxyLog: ")

#<<

 

# ----- mi_fifo params -----

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

 

 

# ----- tm params -----

# auto-discard branches from previous serial forking leg

modparam("tm", "failure_reply_mode", 3)

# default retransmission timeout: 30sec

modparam("tm", "fr_timer", 30000)

# default invite retransmission timeout after 1xx: 120sec

modparam("tm", "fr_inv_timer", 120000)

 

 

# ----- rr params -----

# add value to ;lr param to cope with most of the UAs

modparam("rr", "enable_full_lr", 1)

# do not append from tag to the RR (no need for this script)

modparam("rr", "append_fromtag", 0)

 

 

# ----- registrar params -----

modparam("registrar", "method_filtering", 1)

/* uncomment the next line to disable parallel forking via location */

# modparam("registrar", "append_branches", 0)

/* uncomment the next line not to allow more than 10 contacts per AOR */

#modparam("registrar", "max_contacts", 10)

# max value for expires of registrations

modparam("registrar", "max_expires", 3600)

# set it to 1 to enable GRUU

modparam("registrar", "gruu_enabled", 0)

 

 

# ----- acc params -----

/* what special events should be accounted ? */

modparam("acc", "early_media", 0)

modparam("acc", "report_ack", 0)

modparam("acc", "report_cancels", 0)

/* by default ww do not adjust the direct of the sequential requests.

   if you enable this parameter, be sure the enable "append_fromtag"

   in "rr" module */

modparam("acc", "detect_direction", 0)

/* account triggers (flags) */

modparam("acc", "log_flag", FLT_ACC)

modparam("acc", "log_missed_flag", FLT_ACCMISSED)

modparam("acc", "log_extra", 

"src_user=$fU;src_domain=$fd;src_ip=$si;"

"dst_ouser=$tU;dst_user=$rU;dst_domain=$rd")

modparam("acc", "failed_transaction_flag", FLT_ACCFAILED)

/* enhanced DB accounting */

#!ifdef WITH_ACCDB

modparam("acc", "db_flag", FLT_ACC)

modparam("acc", "db_missed_flag", FLT_ACCMISSED)

modparam("acc", "db_url", DBURL)

modparam("acc", "db_extra",

"src_user=$fU;src_domain=$fd;src_ip=$si;"

"dst_ouser=$tU;dst_user=$rU;dst_domain=$rd")

#!endif

 

 

# ----- usrloc params -----

/* enable DB persistency for location entries */

#!ifdef WITH_USRLOCDB

modparam("usrloc", "db_url", DBURL)

modparam("usrloc", "db_mode", 2)

modparam("usrloc", "use_domain", MULTIDOMAIN)

#!endif

 

 

# ----- auth_db params -----

#!ifdef WITH_AUTH

modparam("auth_db", "db_url", DBURL)

modparam("auth_db", "calculate_ha1", yes)

modparam("auth_db", "password_column", "password")

modparam("auth_db", "load_credentials", "")

modparam("auth_db", "use_domain", MULTIDOMAIN)

 

# ----- permissions params -----

#!ifdef WITH_IPAUTH

modparam("permissions", "db_url", DBURL)

modparam("permissions", "db_mode", 1)

#!endif

 

#!endif

 

 

# ----- alias_db params -----

#!ifdef WITH_ALIASDB

modparam("alias_db", "db_url", DBURL)

modparam("alias_db", "use_domain", MULTIDOMAIN)

#!endif

 

 

# ----- speedial params -----

#!ifdef WITH_SPEEDDIAL

modparam("speeddial", "db_url", DBURL)

modparam("speeddial", "use_domain", MULTIDOMAIN)

#!endif

 

 

# ----- domain params -----

#!ifdef WITH_MULTIDOMAIN

modparam("domain", "db_url", DBURL)

# register callback to match myself condition with domains list

modparam("domain", "register_myself", 1)

#!endif

 

 

#!ifdef WITH_PRESENCE

# ----- presence params -----

modparam("presence", "db_url", DBURL)

modparam("presence", "db_update_period", 20)

 

# ----- presence_xml params -----

modparam("presence_xml", "db_url", DBURL)

modparam("presence_xml", "force_active", 0)

#!endif

 

#!ifdef WITH_XCAPSRV

# ----- xcap_server params -----

modparam("xcap_server", "db_url", DBURL)

#!endif

 

#!ifdef WITH_NAT

# ----- rtpproxy params -----

modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:22222")

 

# ----- nathelper params -----

modparam("nathelper", "natping_interval", 30)

modparam("nathelper", "ping_nated_only", 1)

modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)

modparam("nathelper", "sipping_from", "sip:pinger@ip02.sip.uniza.sk")

 

# params needed for NAT traversal in other modules

modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)")

modparam("usrloc", "nat_bflag", FLB_NATB)

#!endif

 

 

#!ifdef WITH_TLS

# ----- tls params -----

modparam("tls", "config", "/etc/kamailio/tls.cfg")

#!endif

 

#!ifdef WITH_ANTIFLOOD

# ----- pike params -----

modparam("pike", "sampling_time_unit", 2)

modparam("pike", "reqs_density_per_unit", 16)

modparam("pike", "remove_latency", 4)

 

# ----- htable params -----

# ip ban htable with autoexpire after 5 minutes

modparam("htable", "htable", "ipban=>size=8;autoexpire=300;")

#!endif

 

#!ifdef WITH_XMLRPC

# ----- xmlrpc params -----

modparam("xmlrpc", "route", "XMLRPC");

modparam("xmlrpc", "url_match", "^/RPC")

#!endif

 

#!ifdef WITH_DEBUG

# ----- debugger params -----

modparam("debugger", "cfgtrace", 1)

#!endif

 

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

 

 

# 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);

 

# NAT detection

route(NATDETECT);

 

# CANCEL processing

if (is_method("CANCEL"))

{

if (t_check_trans())

t_relay();

exit;

}

 

# handle requests within SIP dialogs

route(WITHINDLG);

 

### only initial requests (no To tag)

 

t_check_trans();

 

# authentication

route(AUTH);

 

# 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();

 

# account only INVITEs

if (is_method("INVITE"))

{

setflag(FLT_ACC); # do accounting

}

 

# dispatch requests to foreign domains

route(SIPOUT);

 

### requests for my local domains

 

# handle presence related requests

route(PRESENCE);

 

# handle registrations

route(REGISTRAR);

 

if ($rU==$null)

{

# request with no Username in RURI

sl_send_reply("484","Address Incomplete");

exit;

}

 

# dispatch destinations to PSTN

route(PSTN);

 

# user location service

route(LOCATION);

 

route(RELAY);

}

 

#>>

route[INDOMAIN]{

#!ifdef WITH_V4V6

## if calle in local domain and V4/V6 translation needed ->

## -> rewrite IP in SIP URI back to other version of SIP domain IP

if(!has_totag() && isbflagset(FLB_V4V6) && lookup('location')){

xlog("L_INFO","URI domain before change: $rd\n");

if(af == INET){

$ru="sip:" + $rU + "@" + "[2001:4118:300:122:444a:3fff:fecc:61a0]"+":"+$rp;

}else{

$ru="sip:" + $rU + "@" + "158.193.139.46" + ":"+$rp;

}

xlog("L_INFO","Request URI after rewrite: $ru\n");

}

#!endif

return;

}

#<<

 

#>>

route[FROMBRIDGE]{

if($si==BRIDGE_IP6 || $si==BRIDGE_IP4){

return 1;

}

return -1;

}

 

route[TOBRIDGE]{

#!ifdef WITH_V4V6

if(isbflagset(FLB_V4V6)){

if(af == INET6){

if(!t_relay(BRIDGE_IP6,"5060")) sl_reply_error(); 

exit;

}else{

if(!t_relay(BRIDGE_IP4,"5060")) sl_reply_error(); 

exit;

}

}

#!endif

return;

}

 

route[IPV4V6] {

#!ifdef WITH_V4V6

if (!has_totag()){ 

if (to_uri!=myself){

if(from_uri==myself){

# SIP message goes from local domain out

if(is_ip($rd)){

# target domain defined with IP address

if((af==INET && is_ipv6_reference($rd)) || (af==INET6 && is_ipv4($rd))) {

setbflag(FLB_V4V6);

}

} else {

# target domain in R-URI defined with domain name - DNS used

# launch script, which returns list of IP addresses of all SIP servers, which provide that service in R-URI

# IP addresses saved in $avp(i:1), $avp(i:2), ...

 

exec_avp("/etc/kamailio/test.sh _sip._'$rP'.'$rd'.");

if($avp(i:1) != "Unknown"){

$var(i) = 1;

$var(bridge) = "yes";

while ($avp($var(i)) != 0){

if((af==INET && is_ipv4($avp($var(i)))) || (af==INET6 && is_ipv6($avp($var(i))))) {

# if exists IP with the same AF than AF of sender --> bridge isnt needed

$var(bridge) = "no";

break;

}

$var(i) = $var(i)+1;

}

xlog("L_INFO","BRIDGE > $var(bridge)");

if($var(bridge) == "yes") {

setbflag(FLB_V4V6);

}

}

}

} else {

# message is only going throught SIP server

return;

}

} else {

if(af==INET6 && !isbflagset(FLB_IPV6)){

setbflag(FLB_V4V6);

} else {

if(af==INET && isbflagset(FLB_IPV6)) {

setbflag(FLB_V4V6);

}

}

}

}

#!endif

return;

}

#<<

 

route[RELAY] {

 

# enable additional event routes for forwarded requests

# - serial forking, RTP relaying handling, a.s.o.

if (is_method("INVITE|SUBSCRIBE")) {

t_on_branch("MANAGE_BRANCH");

t_on_reply("MANAGE_REPLY");

}

if (is_method("INVITE")) {

t_on_failure("MANAGE_FAILURE");

}

 

route(IPV4V6);

route(INDOMAIN);

route(TOBRIDGE);

 

if (!t_relay()) {

sl_reply_error();

}

exit;

}

 

# Per SIP request initial checks

route[REQINIT] {

#!ifdef WITH_ANTIFLOOD

# flood dection from same IP and traffic ban for a while

# be sure you exclude checking trusted peers, such as pstn gateways

# - local host excluded (e.g., loop to self)

if(src_ip!=myself)

{

if($sht(ipban=>$si)!=$null)

{

# ip is already blocked

xdbg("request from blocked IP - $rm from $fu (IP:$si:$sp)\n");

exit;

}

if (!pike_check_req())

{

xlog("L_ALERT","ALERT: pike blocking $rm from $fu (IP:$si:$sp)\n");

$sht(ipban=>$si) = 1;

exit;

}

}

#!endif

 

if (!mf_process_maxfwd_header("10")) {

sl_send_reply("483","Too Many Hops");

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()) {

# sequential request withing a dialog should

# take the path determined by record-routing

if (loose_route()) {

route(DLGURI);

if (is_method("BYE")) {

setflag(FLT_ACC); # do accounting ...

setflag(FLT_ACCFAILED); # ... even if the transaction fails

}

else if ( is_method("ACK") ) {

# ACK is forwarded statelessy

route(NATMANAGE);

}

else if ( is_method("NOTIFY") ) {

# Add Record-Route for in-dialog NOTIFY as per RFC 6665.

record_route();

}

route(RELAY);

} else {

if (is_method("SUBSCRIBE") && uri == myself) {

# in-dialog subscribe requests

route(PRESENCE);

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

t_relay();

exit;

} else {

# ACK without matching transaction ... ignore and discard

exit;

}

}

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

}

exit;

}

}

 

# Handle SIP registrations

route[REGISTRAR] {

if (is_method("REGISTER"))

{

if(isflagset(FLT_NATS))

{

setbflag(FLB_NATB);

# uncomment next line to do SIP NAT pinging 

# setbflag(FLB_NATSIPPING);

}

if(af==INET6)

setbflag(FLB_IPV6);

if (!save("location"))

sl_reply_error();

 

exit;

}

}

 

# USER location service

route[LOCATION] {

 

#!ifdef WITH_SPEEDIAL

# search for short dialing - 2-digit extension

if($rU=~"^[0-9][0-9]$")

if(sd_lookup("speed_dial"))

route(SIPOUT);

#!endif

 

#!ifdef WITH_ALIASDB

# search in DB-based aliases

if(alias_db_lookup("dbaliases"))

route(SIPOUT);

#!endif

 

$avp(oexten) = $rU;

if (!lookup("location")) {

$var(rc) = $rc;

t_newtran();

switch ($var(rc)) {

case -1:

case -3:

send_reply("404", "Not Found");

exit;

case -2:

send_reply("405", "Method Not Allowed");

exit;

}

}

 

# when routing via usrloc, log the missed calls also

if (is_method("INVITE"))

{

setflag(FLT_ACCMISSED);

}

}

 

# Presence server route

route[PRESENCE] {

if(!is_method("PUBLISH|SUBSCRIBE"))

return;

 

#!ifdef WITH_PRESENCE

if (!t_newtran())

{

sl_reply_error();

exit;

};

 

if(is_method("PUBLISH"))

{

handle_publish();

t_release();

}

else

if( is_method("SUBSCRIBE"))

{

handle_subscribe();

t_release();

}

exit;

#!endif

 

# if presence enabled, this part will not be executed

if (is_method("PUBLISH") || $rU==$null)

{

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

exit;

}

return;

}

 

# Authentication route

route[AUTH] {

#!ifdef WITH_AUTH

 

#!ifdef WITH_V4V6

# messages from SIP Bridge without authentication

if(route(FROMBRIDGE))

return;

#!endif

 

#!ifdef WITH_IPAUTH

if((!is_method("REGISTER")) && allow_source_address())

{

# source IP allowed

return;

}

#!endif

 

if (is_method("REGISTER") || from_uri==myself)

{

# authenticate requests

if (!auth_check("$fd", "subscriber", "1")) {

auth_challenge("$fd", "0");

exit;

}

# user authenticated - remove auth header

if(!is_method("REGISTER|PUBLISH"))

consume_credentials();

}

# if caller is not local subscriber, then check if it calls

# a local destination, otherwise deny, not an open relay here

if (from_uri!=myself && uri!=myself)

{

sl_send_reply("403","Not relaying");

exit;

}

 

#!endif

return;

}

 

# Caller NAT detection route

route[NATDETECT] {

# if from IPv6, NAT not needed

if(af==INET6)   

return;

#!ifdef WITH_NAT

force_rport();

if (nat_uac_test("19")) {

if (is_method("REGISTER")) {

fix_nated_register();

} else {

add_contact_alias();

}

setflag(FLT_NATS);

}

#!endif

return;

}

 

# RTPProxy control

route[NATMANAGE] {

#!ifdef WITH_NAT

if(af==INET6)

return;

 

if (is_request()) {

if(has_totag()) {

if(check_route_param("nat=yes")) {

setbflag(FLB_NATB);

}

}

}

if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB)))

return;

 

rtpproxy_manage("froc");

 

if (is_request()) {

if (!has_totag()) {

add_rr_param(";nat=yes");

}

}

if (is_reply()) {

if(isbflagset(FLB_NATB)) {

add_contact_alias();

}

}

#!endif

return;

}

 

# URI update for dialog requests

route[DLGURI] {

#!ifdef WITH_NAT

if(!isdsturiset()) {

handle_ruri_alias();

}

#!endif

return;

}

 

# Routing to foreign domains

route[SIPOUT] {

if (!uri==myself)

{

append_hf("P-hint: outbound\r\n");

route(RELAY);

}

}

 

# PSTN GW routing

route[PSTN] {

#!ifdef WITH_PSTN

# check if PSTN GW IP is defined

if (strempty($sel(cfg_get.pstn.gw_ip))) {

xlog("SCRIPT: PSTN rotuing enabled but pstn.gw_ip not defined\n");

return;

}

 

# route to PSTN dialed numbers starting with '+' or '00'

#     (international format)

# - update the condition to match your dialing rules for PSTN routing

if(!($rU=~"^(\+|00)[1-9][0-9]{3,20}$"))

return;

 

# only local users allowed to call

if(from_uri!=myself) {

sl_send_reply("403", "Not Allowed");

exit;

}

 

$ru = "sip:" + $rU + "@" + $sel(cfg_get.pstn.gw_ip);

 

route(RELAY);

exit;

#!endif

 

return;

}

 

# XMLRPC routing

#!ifdef WITH_XMLRPC

route[XMLRPC] {

# allow XMLRPC from localhost

if ((method=="POST" || method=="GET")

&& (src_ip==127.0.0.1)) {

# close connection only for xmlrpclib user agents (there is a bug in

# xmlrpclib: it waits for EOF before interpreting the response).

if ($hdr(User-Agent) =~ "xmlrpclib")

set_reply_close();

set_reply_no_connect();

dispatch_rpc();

exit;

}

send_reply("403", "Forbidden");

exit;

}

#!endif

 

# route to voicemail server

route[TOVOICEMAIL] {

#!ifdef WITH_VOICEMAIL

if(!is_method("INVITE"))

return;

 

# check if VoiceMail server IP is defined

if (strempty($sel(cfg_get.voicemail.srv_ip))) {

xlog("SCRIPT: VoiceMail rotuing enabled but IP not defined\n");

return;

}

if($avp(oexten)==$null)

return;

 

$ru = "sip:" + "vmbox-" + $avp(oexten) + "@" + $sel(cfg_get.voicemail.srv_ip)

+ ":" + $sel(cfg_get.voicemail.srv_port);

route(RELAY);

exit;

#!endif

 

return;

}

 

# manage outgoing branches

branch_route[MANAGE_BRANCH] {

xdbg("new branch [$T_branch_idx] to $ru\n");

route(IPV4V6);

route(NATMANAGE);

}

 

# manage incoming replies

onreply_route[MANAGE_REPLY] {

xdbg("incoming reply\n");

if(status=~"[12][0-9][0-9]")

route(NATMANAGE);

}

 

# manage failure routing cases

failure_route[MANAGE_FAILURE] {

route(NATMANAGE);

 

if (t_is_canceled()) {

exit;

}

 

#!ifdef WITH_BLOCK3XX

# block call redirect based on 3xx replies.

if (t_check_status("3[0-9][0-9]")) {

t_reply("404","Not found");

exit;

}

#!endif

 

#!ifdef WITH_VOICEMAIL

# serial forking

# - route to voicemail on busy or no answer (timeout)

if (t_check_status("486|408")) {

route(TOVOICEMAIL);

exit;

}

#!endif

}

------------------------------------------------------------------------------------------------------------

 config file for SIP protocol GW == SIP bridge

------------------------------------------------------------------------------------------------------------

 #!KAMAILIO

#

# Kamailio (OpenSER) SIP Server v3.2 - default configuration script

#     - web: http://www.kamailio.org

#     - git: http://sip-router.org

#

# Direct your questions about this file to: <sr-users@lists.sip-router.org>

#

# Refer to the Core CookBook at http://www.kamailio.org/dokuwiki/doku.php

# for an explanation of possible statements, functions and parameters.

#

# Several features can be enabled using '#!define WITH_FEATURE' directives:

#

# *** To run in debug mode: 

#     - define WITH_DEBUG

#

# *** To enable mysql: 

#     - define WITH_MYSQL

#

# *** To enable authentication execute:

#     - enable mysql

#     - define WITH_AUTH

#     - add users using 'kamctl'

#

# *** To enable IP authentication execute:

#     - enable mysql

#     - enable authentication

#     - define WITH_IPAUTH

#     - add IP addresses with group id '1' to 'address' table

#

# *** To enable persistent user location execute:

#     - enable mysql

#     - define WITH_USRLOCDB

#

# *** To enable presence server execute:

#     - enable mysql

#     - define WITH_PRESENCE

#

# *** To enable nat traversal execute:

#     - define WITH_NAT

#     - install RTPProxy: http://www.rtpproxy.org

#     - start RTPProxy:

#        rtpproxy -l _your_public_ip_ -s udp:localhost:7722

#

# *** To enable PSTN gateway routing execute:

#     - define WITH_PSTN

#     - set the value of pstn.gw_ip

#     - check route[PSTN] for regexp routing condition

#

# *** To enable database aliases lookup execute:

#     - enable mysql

#     - define WITH_ALIASDB

#

# *** To enable speed dial lookup execute:

#     - enable mysql

#     - define WITH_SPEEDDIAL

#

# *** To enable multi-domain support execute:

#     - enable mysql

#     - define WITH_MULTIDOMAIN

#

# *** To enable TLS support execute:

#     - adjust CFGDIR/tls.cfg as needed

#     - define WITH_TLS

#

# *** To enable XMLRPC support execute:

#     - define WITH_XMLRPC

#     - adjust route[XMLRPC] for access policy

#

# *** To enable anti-flood detection execute:

#     - adjust pike and htable=>ipban settings as needed (default is

#       block if more than 16 requests in 2 seconds and ban for 300 seconds)

#     - define WITH_ANTIFLOOD

#

# *** To block 3XX redirect replies execute:

#     - define WITH_BLOCK3XX

#

# *** To enable VoiceMail routing execute:

#     - define WITH_VOICEMAIL

#     - set the value of voicemail.srv_ip

#     - adjust the value of voicemail.srv_port

#

# *** To enhance accounting execute:

#     - enable mysql

#     - define WITH_ACCDB

#     - add following columns to database

#!ifdef ACCDB_COMMENT

  ALTER TABLE acc ADD COLUMN src_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN src_domain VARCHAR(128) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN src_ip varchar(64) NOT NULL default '';

  ALTER TABLE acc ADD COLUMN dst_ouser VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN dst_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN dst_domain VARCHAR(128) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN src_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN src_domain VARCHAR(128) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN src_ip varchar(64) NOT NULL default '';

  ALTER TABLE missed_calls ADD COLUMN dst_ouser VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN dst_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN dst_domain VARCHAR(128) NOT NULL DEFAULT '';

#!endif

 

####### Defined Values #########

#!define WITH_IPV6

#!define WITH_NAT

#!define WITH_V4V6

#!define WITH_BRIDGE

 

#!define ADDR_IP4 158.193.139.207

 

#!ifdef WITH_IPV6

#!define ADDR_IP6 [2001:4118:300:122:a00:27ff:fe60:83c]

#!endif

 

# *** Value defines - IDs used later in config

#!ifdef WITH_MYSQL

# - database URL - used to connect to database server by modules such

#       as: auth_db, acc, usrloc, a.s.o.

#!define DBURL "mysql://openser:openserrw@localhost/kamailio"

#!endif

#!ifdef WITH_MULTIDOMAIN

# - the value for 'use_domain' parameters

#!define MULTIDOMAIN 1

#!else

#!define MULTIDOMAIN 0

#!endif

 

# - flags

#   FLT_ - per transaction (message) flags

# FLB_ - per branch flags

#!define FLT_ACC 1

#!define FLT_ACCMISSED 2

#!define FLT_ACCFAILED 3

#!define FLT_NATS 5

 

#!define FLB_NATB 1

#!define FLB_NATSIPPING 2

#!define FLB_V4V6 6 

####### Global Parameters #########

 

# DNS parametre

use_dns_cache=on

#dns_try_ipv6=yes

 

#!ifdef WITH_DEBUG

debug=4

log_stderror=yes

#!else

debug=2

log_stderror=no

#!endif

 

memdbg=5

memlog=5

 

log_facility=LOG_LOCAL0

 

fork=yes

children=4

 

/* uncomment the next line to disable TCP (default on) */

#disable_tcp=yes

 

/* uncomment the next line to disable the auto discovery of local aliases

   based on reverse DNS on IPs (default on) */

#auto_aliases=no

 

/* add local domain aliases */

alias="bridge.local"

alias="[2001:4118:300:122:a00:27ff:fe60:83c]"

alias="158.193.139.207"

 

#!ifdef WITH_IPV6

listen=ADDR_IP4

listen=ADDR_IP6

#!else

/* uncomment and configure the following line if you want Kamailio to 

   bind on a specific interface/port/proto (default bind on all available) */

#listen=udp:10.0.0.10:5060

#!endif

 

/* port to listen to

 * - can be specified more than once if needed to listen on many ports */

port=5060

 

#!ifdef WITH_TLS

enable_tls=yes

#!endif

 

# life time of TCP connection when there is no traffic

# - a bit higher than registration expires to cope with UA behind NAT

tcp_connection_lifetime=3605

 

####### Custom Parameters #########

 

# These parameters can be modified runtime via RPC interface

# - see the documentation of 'cfg_rpc' module.

#

# Format: group.id = value 'desc' description

# Access: $sel(cfg_get.group.id) or @cfg_get.group.id

#

 

#!ifdef WITH_PSTN

# PSTN GW Routing

#

# - pstn.gw_ip: valid IP or hostname as string value, example:

# pstn.gw_ip = "10.0.0.101" desc "My PSTN GW Address"

#

# - by default is empty to avoid misrouting

pstn.gw_ip = "" desc "PSTN GW Address"

#!endif

 

#!ifdef WITH_VOICEMAIL

# VoiceMail Routing on offline, busy or no answer

#

# - by default Voicemail server IP is empty to avoid misrouting

voicemail.srv_ip = "" desc "VoiceMail IP Address"

voicemail.srv_port = "5060" desc "VoiceMail Port"

#!endif

 

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

 

# set paths to location of modules (to sources or installation folders)

#!ifdef WITH_SRCPATH

mpath="modules_k:modules"

#!else

mpath="/usr/lib/kamailio/modules_k/:/usr/lib/kamailio/modules/"

#!endif

 

#!ifdef WITH_MYSQL

loadmodule "db_mysql.so"

#!endif

 

loadmodule "mi_fifo.so"

loadmodule "kex.so"

loadmodule "tm.so"

loadmodule "tmx.so"

loadmodule "sl.so"

loadmodule "rr.so"

loadmodule "pv.so"

loadmodule "maxfwd.so"

loadmodule "usrloc.so"

loadmodule "registrar.so"

loadmodule "textops.so"

loadmodule "siputils.so"

loadmodule "xlog.so"

loadmodule "sanity.so"

loadmodule "ctl.so"

loadmodule "cfg_rpc.so"

loadmodule "mi_rpc.so"

loadmodule "acc.so"

 

#!ifdef WITH_V4V6

loadmodule "ipops.so"

loadmodule "exec.so"

#!endif

 

#!ifdef WITH_AUTH

loadmodule "auth.so"

loadmodule "auth_db.so"

#!ifdef WITH_IPAUTH

loadmodule "permissions.so"

#!endif

#!endif

 

#!ifdef WITH_ALIASDB

loadmodule "alias_db.so"

#!endif

 

#!ifdef WITH_SPEEDDIAL

loadmodule "speeddial.so"

#!endif

 

#!ifdef WITH_MULTIDOMAIN

loadmodule "domain.so"

#!endif

 

#!ifdef WITH_PRESENCE

loadmodule "presence.so"

loadmodule "presence_xml.so"

#!endif

 

#!ifdef WITH_NAT

loadmodule "nathelper.so"

loadmodule "rtpproxy.so"

#!endif

 

#!ifdef WITH_TLS

loadmodule "tls.so"

#!endif

 

#!ifdef WITH_ANTIFLOOD

loadmodule "htable.so"

loadmodule "pike.so"

#!endif

 

#!ifdef WITH_XMLRPC

loadmodule "xmlrpc.so"

#!endif

 

#!ifdef WITH_DEBUG

loadmodule "debugger.so"

#!endif

 

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

 

 

# ----- mi_fifo params -----

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

 

 

# ----- tm params -----

# auto-discard branches from previous serial forking leg

modparam("tm", "failure_reply_mode", 3)

# default retransmission timeout: 30sec

modparam("tm", "fr_timer", 30000)

# default invite retransmission timeout after 1xx: 120sec

modparam("tm", "fr_inv_timer", 120000)

 

 

# ----- rr params -----

# add value to ;lr param to cope with most of the UAs

modparam("rr", "enable_full_lr", 1)

# do not append from tag to the RR (no need for this script)

modparam("rr", "append_fromtag", 0)

 

 

# ----- registrar params -----

modparam("registrar", "method_filtering", 1)

/* uncomment the next line to disable parallel forking via location */

# modparam("registrar", "append_branches", 0)

/* uncomment the next line not to allow more than 10 contacts per AOR */

#modparam("registrar", "max_contacts", 10)

# max value for expires of registrations

modparam("registrar", "max_expires", 3600)

 

 

# ----- acc params -----

/* what special events should be accounted ? */

modparam("acc", "early_media", 0)

modparam("acc", "report_ack", 0)

modparam("acc", "report_cancels", 0)

/* by default ww do not adjust the direct of the sequential requests.

   if you enable this parameter, be sure the enable "append_fromtag"

   in "rr" module */

modparam("acc", "detect_direction", 0)

/* account triggers (flags) */

modparam("acc", "log_flag", FLT_ACC)

modparam("acc", "log_missed_flag", FLT_ACCMISSED)

modparam("acc", "log_extra", 

"src_user=$fU;src_domain=$fd;src_ip=$si;"

"dst_ouser=$tU;dst_user=$rU;dst_domain=$rd")

modparam("acc", "failed_transaction_flag", FLT_ACCFAILED)

/* enhanced DB accounting */

#!ifdef WITH_ACCDB

modparam("acc", "db_flag", FLT_ACC)

modparam("acc", "db_missed_flag", FLT_ACCMISSED)

modparam("acc", "db_url", DBURL)

modparam("acc", "db_extra",

"src_user=$fU;src_domain=$fd;src_ip=$si;"

"dst_ouser=$tU;dst_user=$rU;dst_domain=$rd")

#!endif

 

 

# ----- usrloc params -----

/* enable DB persistency for location entries */

#!ifdef WITH_USRLOCDB

modparam("usrloc", "db_url", DBURL)

modparam("usrloc", "db_mode", 2)

modparam("usrloc", "use_domain", MULTIDOMAIN)

#!endif

 

 

# ----- auth_db params -----

#!ifdef WITH_AUTH

modparam("auth_db", "db_url", DBURL)

modparam("auth_db", "calculate_ha1", yes)

modparam("auth_db", "password_column", "password")

modparam("auth_db", "load_credentials", "")

modparam("auth_db", "use_domain", MULTIDOMAIN)

 

# ----- permissions params -----

#!ifdef WITH_IPAUTH

modparam("permissions", "db_url", DBURL)

modparam("permissions", "db_mode", 1)

#!endif

 

#!endif

 

 

# ----- alias_db params -----

#!ifdef WITH_ALIASDB

modparam("alias_db", "db_url", DBURL)

modparam("alias_db", "use_domain", MULTIDOMAIN)

#!endif

 

 

# ----- speedial params -----

#!ifdef WITH_SPEEDDIAL

modparam("speeddial", "db_url", DBURL)

modparam("speeddial", "use_domain", MULTIDOMAIN)

#!endif

 

 

# ----- domain params -----

#!ifdef WITH_MULTIDOMAIN

modparam("domain", "db_url", DBURL)

# use caching

modparam("domain", "db_mode", 1)

# register callback to match myself condition with domains list

modparam("domain", "register_myself", 1)

#!endif

 

 

#!ifdef WITH_PRESENCE

# ----- presence params -----

modparam("presence", "db_url", DBURL)

 

# ----- presence_xml params -----

modparam("presence_xml", "db_url", DBURL)

modparam("presence_xml", "force_active", 1)

#!endif

 

 

#!ifdef WITH_NAT

# ----- rtpproxy params -----

modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:22222")

#modparam("rtpproxy", "rtpproxy_sock", "unix:/var/run/rtpproxy/rtpproxy.sock")

# ----- nathelper params -----

modparam("nathelper", "natping_interval", 30)

modparam("nathelper", "ping_nated_only", 1)

modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)

modparam("nathelper", "sipping_from", "sip:pinger@kamailio.org")

 

# params needed for NAT traversal in other modules

modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)")

modparam("usrloc", "nat_bflag", FLB_NATB)

#!endif

 

 

#!ifdef WITH_TLS

# ----- tls params -----

modparam("tls", "config", "/etc/kamailio/tls.cfg")

#!endif

 

#!ifdef WITH_ANTIFLOOD

# ----- pike params -----

modparam("pike", "sampling_time_unit", 2)

modparam("pike", "reqs_density_per_unit", 16)

modparam("pike", "remove_latency", 4)

 

# ----- htable params -----

# ip ban htable with autoexpire after 5 minutes

modparam("htable", "htable", "ipban=>size=8;autoexpire=300;")

#!endif

 

#!ifdef WITH_XMLRPC

# ----- xmlrpc params -----

modparam("xmlrpc", "route", "XMLRPC");

modparam("xmlrpc", "url_match", "^/RPC")

#!endif

 

#!ifdef WITH_DEBUG

# ----- debugger params -----

modparam("debugger", "cfgtrace", 1)

#!endif

 

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

 

 

# 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(BRIDGE);

 

route(REQINIT);

 

# NAT detection

route(NATDETECT);

 

# handle requests within SIP dialogs

route(WITHINDLG);

 

### only initial requests (no To tag)

 

# CANCEL processing

if (is_method("CANCEL"))

{

if (t_check_trans())

t_relay();

exit;

}

 

t_check_trans();

 

# authentication

route(AUTH);

 

# 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();

 

# account only INVITEs

if (is_method("INVITE"))

{

setflag(FLT_ACC); # do accounting

}

 

# dispatch requests to foreign domains

route(SIPOUT);

 

### requests for my local domains

 

# handle presence related requests

route(PRESENCE);

 

# handle registrations

route(REGISTRAR);

 

if ($rU==$null)

{

# request with no Username in RURI

sl_send_reply("484","Address Incomplete");

exit;

}

 

# dispatch destinations to PSTN

route(PSTN);

 

# user location service

route(LOCATION);

 

route(RELAY);

}

 

route[BRIDGE]{

#!ifdef WITH_BRIDGE

if(to_uri!=myself && from_uri!=myself){

# message goes only throught this server - BRIDGE

# => translation provided

setbflag(FLB_V4V6);

}

#!endif

return;

}

 

route[RELAY] {

 

# enable additional event routes for forwarded requests

# - serial forking, RTP relaying handling, a.s.o.

if (is_method("INVITE|SUBSCRIBE")) {

t_on_branch("MANAGE_BRANCH");

t_on_reply("MANAGE_REPLY");

}

if (is_method("INVITE")) {

t_on_failure("MANAGE_FAILURE");

}

 

if (!t_relay()) {

sl_reply_error();

}

exit;

}

 

# Per SIP request initial checks

route[REQINIT] {

#!ifdef WITH_ANTIFLOOD

# flood dection from same IP and traffic ban for a while

# be sure you exclude checking trusted peers, such as pstn gateways

# - local host excluded (e.g., loop to self)

if(src_ip!=myself)

{

if($sht(ipban=>$si)!=$null)

{

# ip is already blocked

xdbg("request from blocked IP - $rm from $fu (IP:$si:$sp)\n");

exit;

}

if (!pike_check_req())

{

xlog("L_ALERT","ALERT: pike blocking $rm from $fu (IP:$si:$sp)\n");

$sht(ipban=>$si) = 1;

exit;

}

}

#!endif

 

if (!mf_process_maxfwd_header("10")) {

sl_send_reply("483","Too Many Hops");

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()) {

# sequential request withing a dialog should

# take the path determined by record-routing

if (loose_route()) {

if (is_method("BYE")) {

setflag(FLT_ACC); # do accounting ...

setflag(FLT_ACCFAILED); # ... even if the transaction fails

}

if ( is_method("ACK") ) {

# ACK is forwarded statelessy

route(NATMANAGE);

}

route(RELAY);

} else {

if (is_method("SUBSCRIBE") && uri == myself) {

# in-dialog subscribe requests

route(PRESENCE);

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

t_relay();

exit;

} else {

# ACK without matching transaction ... ignore and discard

exit;

}

}

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

}

exit;

}

}

 

# Handle SIP registrations

route[REGISTRAR] {

if (is_method("REGISTER"))

{

if(isflagset(FLT_NATS))

{

setbflag(FLB_NATB);

# uncomment next line to do SIP NAT pinging 

## setbflag(FLB_NATSIPPING);

}

if (!save("location"))

sl_reply_error();

 

exit;

}

}

 

# USER location service

route[LOCATION] {

 

#!ifdef WITH_SPEEDIAL

# search for short dialing - 2-digit extension

if($rU=~"^[0-9][0-9]$")

if(sd_lookup("speed_dial"))

route(SIPOUT);

#!endif

 

#!ifdef WITH_ALIASDB

# search in DB-based aliases

if(alias_db_lookup("dbaliases"))

route(SIPOUT);

#!endif

 

$avp(oexten) = $rU;

if (!lookup("location")) {

$var(rc) = $rc;

route(TOVOICEMAIL);

t_newtran();

switch ($var(rc)) {

case -1:

case -3:

send_reply("404", "Not Found");

exit;

case -2:

send_reply("405", "Method Not Allowed");

exit;

}

}

 

# when routing via usrloc, log the missed calls also

if (is_method("INVITE"))

{

setflag(FLT_ACCMISSED);

}

}

 

# Presence server route

route[PRESENCE] {

if(!is_method("PUBLISH|SUBSCRIBE"))

return;

 

#!ifdef WITH_PRESENCE

if (!t_newtran())

{

sl_reply_error();

exit;

};

 

if(is_method("PUBLISH"))

{

handle_publish();

t_release();

}

else

if( is_method("SUBSCRIBE"))

{

handle_subscribe();

t_release();

}

exit;

#!endif

 

# if presence enabled, this part will not be executed

if (is_method("PUBLISH") || $rU==$null)

{

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

exit;

}

return;

}

 

# Authentication route

route[AUTH] {

#!ifdef WITH_AUTH

if (is_method("REGISTER"))

{

# authenticate the REGISTER requests (uncomment to enable auth)

if (!www_authorize("$td", "subscriber"))

{

www_challenge("$td", "0");

exit;

}

 

if ($au!=$tU)

{

sl_send_reply("403","Forbidden auth ID");

exit;

}

} else {

 

#!ifdef WITH_IPAUTH

if(allow_source_address())

{

# source IP allowed

return;

}

#!endif

 

# authenticate if from local subscriber

if (from_uri==myself)

{

if (!proxy_authorize("$fd", "subscriber")) {

proxy_challenge("$fd", "0");

exit;

}

if (is_method("PUBLISH"))

{

if ($au!=$fU || $au!=$tU) {

sl_send_reply("403","Forbidden auth ID");

exit;

}

if ($au!=$rU) {

sl_send_reply("403","Forbidden R-URI");

exit;

}

#!ifdef WITH_MULTIDOMAIN

if ($fd!=$rd) {

sl_send_reply("403","Forbidden R-URI domain");

exit;

}

#!endif

} else {

if ($au!=$fU) {

sl_send_reply("403","Forbidden auth ID");

exit;

}

}

 

consume_credentials();

# caller authenticated

} else {

# caller is not local subscriber, then check if it calls

# a local destination, otherwise deny, not an open relay here

if (!uri==myself)

{

sl_send_reply("403","Not relaying");

exit;

}

}

}

#!endif

return;

}

 

# Caller NAT detection route

route[NATDETECT] {

# if from IPv6, NAT not needed

if(af==INET6)   

return;

#!ifdef WITH_NAT

force_rport();

if (nat_uac_test("19")) {

if (is_method("REGISTER")) {

fix_nated_register();

} else {

fix_nated_contact();

}

setflag(FLT_NATS);

}

#!endif

return;

}

 

# RTPProxy control

route[NATMANAGE] {

#!ifdef WITH_NAT

if (is_request()) {

if(has_totag()) {

if(check_route_param("nat=yes")) {

setbflag(FLB_NATB);

}else {

if(check_route_param("nat=v46")) {

setbflag(FLB_V4V6);

}

}

}

}

 

if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB)|| isbflagset(FLB_V4V6)))   

return;

 

#rtpproxy_manage();

if(isbflagset(FLB_V4V6)) {

if(af==INET6) {

rtpproxy_manage("FAEI");

} else {

rtpproxy_manage("FAIE");

}

} else {

if(af==INET6) {

# zroj aj ciel su IPV6

rtpproxy_manage("FAEE");

} else {

# zdroj aj ciel su IPV4

rtpproxy_manage("FAII");

}

}

if (is_request()) {

if (!has_totag()) {

if(isbflagset(FLB_V4V6)) {

add_rr_param(";nat=v46");

} else {

add_rr_param(";nat=yes");

}

}

}

if (is_reply()) {

if(isbflagset(FLB_NATB)) {

if(af==INET) {

fix_nated_contact();

}

}

}

#!endif

return;

}

 

# Routing to foreign domains

route[SIPOUT] {

if (!uri==myself)

{

append_hf("P-hint: outbound\r\n");

route(RELAY);

}

}

 

# PSTN GW routing

route[PSTN] {

#!ifdef WITH_PSTN

# check if PSTN GW IP is defined

if (strempty($sel(cfg_get.pstn.gw_ip))) {

xlog("SCRIPT: PSTN rotuing enabled but pstn.gw_ip not defined\n");

return;

}

 

# route to PSTN dialed numbers starting with '+' or '00'

#     (international format)

# - update the condition to match your dialing rules for PSTN routing

if(!($rU=~"^(\+|00)[1-9][0-9]{3,20}$"))

return;

 

# only local users allowed to call

if(from_uri!=myself) {

sl_send_reply("403", "Not Allowed");

exit;

}

 

$ru = "sip:" + $rU + "@" + $sel(cfg_get.pstn.gw_ip);

 

route(RELAY);

exit;

#!endif

 

return;

}

 

# XMLRPC routing

#!ifdef WITH_XMLRPC

route[XMLRPC] {

# allow XMLRPC from localhost

if ((method=="POST" || method=="GET")

&& (src_ip==127.0.0.1)) {

# close connection only for xmlrpclib user agents (there is a bug in

# xmlrpclib: it waits for EOF before interpreting the response).

if ($hdr(User-Agent) =~ "xmlrpclib")

set_reply_close();

set_reply_no_connect();

dispatch_rpc();

exit;

}

send_reply("403", "Forbidden");

exit;

}

#!endif

 

# route to voicemail server

route[TOVOICEMAIL] {

#!ifdef WITH_VOICEMAIL

if(!is_method("INVITE"))

return;

 

# check if VoiceMail server IP is defined

if (strempty($sel(cfg_get.voicemail.srv_ip))) {

xlog("SCRIPT: VoiceMail rotuing enabled but IP not defined\n");

return;

}

if($avp(oexten)==$null)

return;

 

$ru = "sip:" + $avp(oexten) + "@" + $sel(cfg_get.voicemail.srv_ip)

+ $sel(cfg_get.voicemail.srv_port);

route(RELAY);

exit;

#!endif

 

return;

}

 

# manage outgoing branches

branch_route[MANAGE_BRANCH] {

xdbg("new branch [$T_branch_idx] to $ru\n");

route(NATMANAGE);

}

 

# manage incoming replies

onreply_route[MANAGE_REPLY] {

xdbg("incoming reply\n");

if(status=~"[12][0-9][0-9]")

route(NATMANAGE);

}

 

# manage failure routing cases

failure_route[MANAGE_FAILURE] {

route(NATMANAGE);

 

if (t_is_canceled()) {

exit;

}

 

#!ifdef WITH_BLOCK3XX

# block call redirect based on 3xx replies.

if (t_check_status("3[0-9][0-9]")) {

t_reply("404","Not found");

exit;

}

#!endif

 

#!ifdef WITH_VOICEMAIL

# serial forking

# - route to voicemail on busy or no answer (timeout)

if (t_check_status("486|408")) {

route(TOVOICEMAIL);

exit;

}

#!endif

}

----------------------------------------------------------------------------------------------
Here some information from logging:
from rtpproxy, wich translates SIP messages between IPv4 and IPv6
-----------------------------------------------------------------------------------------------
Apr 11 10:12:51 bridge rtpproxy[1103]: INFO:handle_command: new session 4817, tag 12674;1 requested, type strong
Apr 11 10:12:51 bridge rtpproxy[1103]: INFO:handle_command: new session on a port 36792 created, tag 12674;1
Apr 11 10:12:51 bridge rtpproxy[1103]: INFO:handle_command: pre-filling caller's address with 2001:4118:300:122:c41b:584d:c288:90f6:7078
Apr 11 10:12:51 bridge rtpproxy[1103]: INFO:handle_command: adding strong flag to existing session, new=1/0/0
Apr 11 10:12:51 bridge rtpproxy[1103]: INFO:handle_command: lookup on ports 36792/0, session timer restarted
Apr 11 10:12:51 bridge rtpproxy[1103]: INFO:handle_command: adding strong flag to existing session, new=1/0/0
Apr 11 10:12:51 bridge rtpproxy[1103]: INFO:handle_command: lookup on ports 36792/0, session timer restarted
Apr 11 10:12:53 bridge rtpproxy[1103]: INFO:handle_command: lookup on ports 36792/52592, session timer restarted
Apr 11 10:12:53 bridge rtpproxy[1103]: INFO:handle_command: pre-filling callee's address with 158.193.139.46:36258
>>>Apr 11 10:13:21 bridge rtpproxy[1103]: INFO:handle_delete: forcefully deleting session 1 on ports 36792/52592
Apr 11 10:13:21 bridge rtpproxy[1103]: INFO:remove_session: RTP stats: 215 in from callee, 214 in from caller, 429 relayed, 0 dropped
Apr 11 10:13:21 bridge rtpproxy[1103]: INFO:remove_session: RTCP stats: 0 in from callee, 1 in from caller, 1 relayed, 0 dropped
Apr 11 10:13:21 bridge rtpproxy[1103]: INFO:remove_session: session on ports 36792/52592 is cleaned up
Apr 11 10:13:21 bridge rtpproxy[1103]: INFO:handle_command: delete request failed: session 4817, tags 12674/NONE not found

------------------------------------------------------------------------------------------------

My problem is related to the line with >>>

 

If somebody has experience with this kind of problem, i will be very thankful for help.

 

Jakub Hrabovsky

(sorry for my english grammar)