[SR-Users] No audio when connect from public network but it works for lan users

Amit Patkar amit at avhan.com
Sun Jan 4 13:22:14 CET 2015


Please check sip.conf. You need to enable NAT options. Asterisk need to publish public IP in SDP for RTP traffic to reach your network. Asterisk need to differentiate local clients and external clients. localnet and externip parameters should be configured correctly. 

Regards,
Amit Patkar

On January 4, 2015 5:53:53 AM IST, CK Lee <ckleea at gmail.com> wrote:
>I am new to Kamailio after starting to play around for 3 weeks.
>
>Before Kamailio, I used asterisk and it works quite well in my network
>which has 2 public IP addresses and 10+ wired and wireless users. The
>asterisk listens to only one IP which my netgear router port forward
>the
>necessary sip and rdp ports to the asterisk.
>
>My interest is to use Kamailio as SIP proxy to sit in front of the
>asterisk. I follow the tutorial here -
>http://kb.asipto.com/asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb
>
>I use debian wheezy and kamailio is installed from the repository with
>version 4.2.1
>
>Everything works for my lan subscribers. However, when I am outside the
>lan, I can register  but do not the incoming packets at my sip client.
>
>What I observe is two strange behaviours
>1. in asterisk, the kamailio peer has to use "sip.example.org or its
>public
>IP" in the host name field, otherwise it is not online
>2. in looking at the log, I found the sip client peer is registered at
>my
>lan address i.e. 192.168.118.xx instead of a public IP when I directly
>login to asterisk.
>
>I add on rtproxy but not succeed with error as force_rtp_proxy_body:
>incorrect port 0 in reply from rtpproxy
>
>Below is my kamailio.cfg
>
>Help is appreciated.
>--------------------------------------
>#!KAMAILIO
>
>
>
>#
># Kamailio (OpenSER) SIP Server v4.0 - default configuration script
>#     - web: http://www.kamailio.org
>#     - git: http://sip-router.org
>#
># Direct your questions about this file to:
><sr-users at 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_MYSQL
>#!define WITH_AUTH
>#!define WITH_USRLOCDB
>#!define WITH_ASTERISK
>#!define WITH_NAT
>#!define WITH_TLS
>
>#!define ADDR_IPV4 192.168.118.30
>
># *** 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://kamailio:kamailiorw@localhost/kamailio"
>#!ifdef WITH_ASTERISK
>#!define DBASTURL "mysql://user:password@localhost/asterisk"
>#!endif
>#!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 6
>#!define FLB_NATSIPPING 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="sip.example.org"
>
>/* 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:192.168.118.30:5060
>listen=tls:192.168.118.30:5061
>
>/* 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
>
>#!ifdef WITH_XCAPSRV
>tcp_accept_no_cl=yes
>#!endif
>
>
>
>tcp_connection_lifetime=3604
>tcp_accept_no_cl=yes
>tcp_rd_buf_size=16384
>
># 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
>
>
>#!ifdef WITH_ASTERISK
>asterisk.bindip = "192.168.118.30" desc "Asterisk IP Address"
>asterisk.bindport = "15066" desc "Asterisk Port"
>kamailio.bindip = "192.168.118.30" desc "Kamailio IP Address"
>kamailio.bindport = "5060" desc "Kamailio 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/i386-linux-gnu/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"
>loadmodule "outbound.so"
>
>#!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
>
>#!ifdef WITH_ASTERISK
>loadmodule "uac.so"
>#!endif
>
># ----------------- setting module-specific parameters ---------------
>
>modparam("ctl", "user", "kamailio")
>
># ----- 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)
>#!ifdef WITH_ASTERISK
>modparam("rr", "append_fromtag", 1)
>#!else
>modparam("rr", "append_fromtag", 0)
>#!endif
>
># ----- 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", "calculate_ha1", yes)
>modparam("auth_db", "load_credentials", "")
>
>#!ifdef WITH_ASTERISK
>modparam("auth_db", "user_column", "name")
>modparam("auth_db", "password_column", "sippasswd")
>modparam("auth_db", "db_url", DBASTURL)
>modparam("auth_db", "version_table", 0)
>#!else
>modparam("auth_db", "db_url", DBURL)
>modparam("auth_db", "password_column", "password")
>modparam("auth_db", "use_domain", MULTIDOMAIN)
>#!endif
>
># ----- 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)
>
># ----- 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 at 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(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[RELAY] {
>
>#!ifdef WITH_NAT
>        if (check_route_param("nat=yes")) {
>                setbflag(FLB_NATB);
>        }
>        if (isflagset(FLT_NATS) || isbflagset(FLB_NATB)) {
>                route(RTPPROXY);
>        }
>#!endif
>
>    # 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;
>}
>
>
># RTPProxy control
>route[RTPPROXY] {
>#!ifdef WITH_NAT
>        if (is_method("BYE")) {
>                unforce_rtp_proxy();
>        } else if (is_method("INVITE")){
>                rtpproxy_offer();
>        }
>        if (!has_totag()) add_rr_param(";nat=yes");
>#!endif
>        return;
>}
>
>
># 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();
>
>#!ifdef WITH_ASTERISK
>        route(REGFWD);
>#!endif
>
>        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
>
>#!ifdef WITH_ASTERISK
>    if(is_method("INVITE") && (!route(FROMASTERISK))) {
>        # if new call from out there - send to Asterisk
>        # - non-INVITE request are routed directly by Kamailio
>        # - traffic from Asterisk is routed also directy by Kamailio
>        route(TOASTERISK);
>        exit;
>    }
>#!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] {
>
>    # 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;
>    }
>
>#!ifdef WITH_AUTH
>
>#!ifdef WITH_ASTERISK
>    # do not auth traffic from Asterisk - trusted!
>    if(route(FROMASTERISK))
>        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
>#!ifdef WITH_ASTERISK
>        if (!auth_check("$fd", "sipusers", "1")) {
>#!else
>        if (!auth_check("$fd", "subscriber", "1")) {
>#!endif
>            auth_challenge("$fd", "0");
>            exit;
>        }
>        # user authenticated - remove auth header
>        if(!is_method("REGISTER|PUBLISH"))
>            consume_credentials();
>    }
>#!endif
>    return;
>}
>
># Caller NAT detection route
>route[NATDETECT] {
>#!ifdef WITH_NAT
>    force_rport();
>    if (nat_uac_test("19")) {
>        if (is_method("REGISTER")) {
>            fix_nated_register();
>        } else {
>            fix_nated_contact();
>        }
>        setflag(FLT_NATS);
>    }
>#!endif
>    return;
>}
>
># RTPProxy control
>route[NATMANAGE] {
>#!ifdef WITH_NAT
>    if (is_request()) {
>        if(has_totag()) {
>            if(check_route_param("nat=yes")) {
>                setbflag(FLB_NATB);
>            }
>        }
>    }
>    if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB)))
>        return;
>
>    rtpproxy_manage();
>
>    if (is_request()) {
>        if (!has_totag()) {
>            add_rr_param(";nat=yes");
>        }
>    }
>    if (is_reply()) {
>        if(isbflagset(FLB_NATB)) {
>            fix_nated_contact();
>        }
>    }
>#!endif
>    return;
>}
>
># Routing to foreign domains
>route[SIPOUT] {
>    if (!uri==myself)
>    {
>        append_hf("P-hint: outbound\r\n");
>        route(RELAY);
>    }
>}
>
># PSTN GW routing
>route[PSTN] {
>#!ifdef WITH_PSTN
>    # check if PSTN GW IP is defined
>    if (strempty($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 $ru\n");
>    route(NATMANAGE);
>}
>
># manage incoming replies
>onreply_route[MANAGE_REPLY] {
>    xdbg("incoming reply\n");
>    if(status=~"[12][0-9][0-9]")
>        route(NATMANAGE);
>}
>
># manage failure routing cases
>failure_route[MANAGE_FAILURE] {
>    route(NATMANAGE);
>
>    if (t_is_canceled()) {
>        exit;
>    }
>
>#!ifdef WITH_BLOCK3XX
>    # block call redirect based on 3xx replies.
>    if (t_check_status("3[0-9][0-9]")) {
>        t_reply("404","Not found");
>        exit;
>    }
>#!endif
>
>#!ifdef WITH_VOICEMAIL
>    # serial forking
>    # - route to voicemail on busy or no answer (timeout)
>    if (t_check_status("486|408")) {
>        route(TOVOICEMAIL);
>        exit;
>    }
>#!endif
>}
>
>#!ifdef WITH_ASTERISK
># Test if coming from Asterisk
>route[FROMASTERISK] {
>    if($si==$sel(cfg_get.asterisk.bindip)
>            && $sp==$sel(cfg_get.asterisk.bindport))
>        return 1;
>    return -1;
>}
>
># Send to Asterisk
>route[TOASTERISK] {
>    $du = "sip:" + $sel(cfg_get.asterisk.bindip) + ":"
>            + $sel(cfg_get.asterisk.bindport);
>    route(RELAY);
>    exit;
>}
>
># Forward REGISTER to Asterisk
>route[REGFWD] {
>    if(!is_method("REGISTER"))
>    {
>        return;
>    }
>    $var(rip) = $sel(cfg_get.asterisk.bindip);
>    $uac_req(method)="REGISTER";
>    $uac_req(ruri)="sip:" + $var(rip) + ":" +
>$sel(cfg_get.asterisk.bindport);
>    $uac_req(furi)="sip:" + $au + "@" + $var(rip);
>    $uac_req(turi)="sip:" + $au + "@" + $var(rip);
>    $uac_req(hdrs)="Contact: <sip:" + $au + "@"
>                + $sel(cfg_get.kamailio.bindip)
>                + ":" + $sel(cfg_get.kamailio.bindport) + ">\r\n";
>    if($sel(contact.expires) != $null)
>        $uac_req(hdrs)= $uac_req(hdrs) + "Expires: " +
>$sel(contact.expires) + "\r\n";
>    else
>        $uac_req(hdrs)= $uac_req(hdrs) + "Expires: " + $hdr(Expires) +
>"\r\n";
>    uac_req_send();
>}
>#!endif
>
>
>------------------------------------------------------------------------
>
>_______________________________________________
>SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>sr-users at lists.sip-router.org
>http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
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