[SR-Users] Call Routing Not working
Daniel-Constantin Mierla
miconda at gmail.com
Fri Jan 7 10:42:35 CET 2011
On 12/30/10 6:42 PM, Tim King wrote:
> Below is my current code and my calls are just getting 100 trying --
> your call is important to us even between to locally registered
> extension. Any guidance as to how to simplify troubleshooting this
> routing?
100 trying is send automatically by t_relay(). If you want to skip that,
see the tm module parameters and functions.
The 100 is intended to stop retransmissions from sender and it is
recommended to have.
Cheers,
Daniel
>
>
> ####### Routing Logic ########
>
>
> # Main SIP request routing logic
> # - processing of any incoming SIP request starts with this route
> route {
>
> # per request initial checks
> route(REQINIT);
>
> # NAT detection
> route(NAT);
>
> # 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;
> }
>
>
> #!ifdef WITH_FREESWITCH
> # save callee ID
> $avp(callee) = $rU;
> route(FSDISPATCH);
> #!endif
>
> # user location service
> route(LOCATION);
>
> route(RELAY);
> }
>
>
> route[RELAY] {
> #!ifdef WITH_NAT
> if (check_route_param("nat=yes")) {
> setbflag(FLB_NATB);
> }
> if (isflagset(FLT_NATS) || isbflagset(FLB_NATB)) {
> route(RTPPROXY);
> }
> #!endif
>
> #!ifdef WITH_CFGSAMPLES
> /* example how to enable some additional event routes */
> if (is_method("INVITE")) {
> #t_on_branch("BRANCH_ONE");
> t_on_reply("REPLY_ONE");
> t_on_failure("FAIL_ONE");
> }
> #!endif
>
> if (!t_relay()) {
> sl_reply_error();
> }
> exit;
> }
>
> # Per SIP request initial checks
> route[REQINIT] {
> #!ifdef WITH_ANTIFLOOD
> # flood dection from same IP and traffic ban for a while
> # be sure you exclude checking trusted peers, such as pstn
> gateways
> # - local host excluded (e.g., loop to self)
> if(src_ip!=myself)
> {
> if($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
> }
> 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_ALIASDB
> # search in DB-based aliases
> alias_db_lookup("dbaliases");
> #!endif
>
> if (!lookup("location")) {
> switch ($rc) {
> 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
> 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_FREESWITCH
> if(route(FSINBOUND))
> return;
> #!endif
>
> #!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 ($au!=$tU) {
> sl_send_reply("403","Forbidden
> auth ID");
> exit;
> }
> } 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[NAT] {
> #!ifdef WITH_NAT
> force_rport();
> if (nat_uac_test("19")) {
> if (method=="REGISTER") {
> fix_nated_register();
> } else {
> fix_nated_contact();
> }
> setflag(FLT_NATS);
> }
> #!endif
> return;
> }
>
> # RTPProxy control
> route[RTPPROXY] {
> #!ifdef WITH_NAT
> if (is_method("BYE")) {
> unforce_rtp_proxy();
> } else if (is_method("INVITE")){
> force_rtp_proxy();
> }
> if (!has_totag()) add_rr_param(";nat=yes");
> #!endif
> return;
> }
>
> # Routing to foreign domains
> route[SIPOUT] {
> if (!uri==myself)
> {
> append_hf("P-hint: outbound\r\n");
> route(RELAY);
> }
> }
>
>
> #!ifdef WITH_FREESWITCH
> # FreeSWITCH routing blocks
> route[FSINBOUND] {
> if($si== $sel(cfg_get.freeswitch.bindip)
> && $sp==$sel(cfg_get.freeswitch.bindport))
> return 1;
> return -1;
> }
>
> route[FSDISPATCH] {
> if(!is_method("INVITE"))
> return;
> if(route(FSINBOUND))
> return;
>
> # dial number selection
> switch($rU) {
> case /"^41$":
> # 41 - voicebox menu
> # allow only authenticated users
> if($au==$null)
> {
> sl_send_reply("403", "Not allowed");
> exit;
> }
> $rU = "vm-" + $au;
> break;
> case /"^441[0-9][0-9]$":
> # starting with 44 folowed by 1XY - direct
> call to voice box
> strip(2);
> route(FSVBOX);
> break;
> case /"^433[01][0-9][0-9]$":
> # starting with 433 folowed by (0|1)XY -
> conference
> strip(2);
> break;
> case /"^45[0-9]+$":
> strip(2);
> break;
> default:
> # offline - send to voicebox
> if (!registered("location"))
> {
> route(FSVBOX);
> exit;
> }
> # online - do bridging
> prefix("kb-");
> if(is_method("INVITE"))
> {
> # in case of failure - re-route to
> FreeSWITCH VoiceMail
> t_on_failure("FAIL_FSVBOX");
> }
> }
> route(FSRELAY);
> exit;
> }
>
> route[FSVBOX] {
> if(!($rU=~"^1[0-9][0-9]+$"))
> return;
> prefix("vb-");
> route(FSRELAY);
> }
>
> # Send to FreeSWITCH
> route[FSRELAY] {
> $du = "sip:" + $sel(cfg_get.freeswitch.bindip) + ":"
> + $sel(cfg_get.freeswitch.bindport);
> if($var(newbranch)==1)
> {
> append_branch();
> $var(newbranch) = 0;
> }
> route(RELAY);
> exit;
> }
>
> #!endif
>
>
> #!ifdef WITH_FREESWITCH
> failure_route[FAIL_FSVBOX] {
> #!ifdef WITH_NAT
> if (is_method("INVITE")
> && (isbflagset(FLB_NATB) || isflagset(FLT_NATS))) {
> unforce_rtp_proxy();
> }
> #!endif
>
> if (t_is_canceled()) {
> exit;
> }
>
> if (t_check_status("486|408")) {
> # re-route to FreeSWITCH VoiceMail
> $rU = $avp(callee);
> $var(newbranch) = 1;
> route(FSVBOX);
> }
> }
> #!endif
>
> # sample config file for dispatcher module
>
> #!ifdef WITH_DISPATCHER
>
> modparam("dispatcher", "db_url",
> "mysql://openser:password@localhost/openser")
>
> route{
> if ( !mf_process_maxfwd_header("10") )
> {
> sl_send_reply("483","To Many Hops");
> drop();
> };
>
> ds_select_dst("1", "0");
>
> forward();
> # t_relay();
> }
> #!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
--
Daniel-Constantin Mierla
Kamailio (OpenSER) Advanced Training
Jan 24-26, 2011, Irvine, CA, USA
http://www.asipto.com
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