Hello,

have a look at
http://www.voice-system.ro/docs/avpops/ar01s08.html#ex_serial_forking

the example is pretty similar with what you want to achieve.

Cheers,
Daniel


On 04/20/06 22:08, Jayesh Nambiar wrote:
> Hi all,
> I am trying to implement simple call forwarding in my script. The
> problem is when the call is forwarded to a another registered user and
> if the user is not in the location table, the message is correctly
> returned as "User Not Found".
> But if the user is present in the location table, the call does not
> get forwarded and invite comes to the same number again. This happens
> when the call is forwarded on no answer. I try to do serial forking
> using avp_pushto() but it does'nt seem to work.
> Can someone please help me out. The blind forwarding works perfectly.
> Here is my script:
>
> debug=3
> fork=yes
> log_stderror=no
> listen=202.XX.61.XX # INSERT YOUR IP ADDRESS HERE
> port=5060
> children=4
> dns=no
> rev_dns=no
> fifo="/tmp/openser_fifo"
> fifo_db_url="mysql://openser:openserrw@localhost/openser"
> loadmodule "/usr/local/lib/openser/modules/mysql.so"
> loadmodule "/usr/local/lib/openser/modules/sl.so"
> loadmodule "/usr/local/lib/openser/modules/tm.so"
> loadmodule "/usr/local/lib/openser/modules/rr.so"
> loadmodule "/usr/local/lib/openser/modules/maxfwd.so"
> loadmodule "/usr/local/lib/openser/modules/usrloc.so"
> loadmodule "/usr/local/lib/openser/modules/registrar.so"
> loadmodule "/usr/local/lib/openser/modules/auth.so"
> loadmodule "/usr/local/lib/openser/modules/auth_db.so"
> loadmodule "/usr/local/lib/openser/modules/uri.so"
> loadmodule "/usr/local/lib/openser/modules/uri_db.so"
> loadmodule "/usr/local/lib/openser/modules/mediaproxy.so"
> loadmodule "/usr/local/lib/openser/modules/nathelper.so"
> loadmodule "/usr/local/lib/openser/modules/textops.so"
> loadmodule "/usr/local/lib/openser/modules/avpops.so"
> loadmodule "/usr/local/lib/openser/modules/domain.so"
> loadmodule "/usr/local/lib/openser/modules/permissions.so"
> modparam("auth_db|permissions|uri_db|usrloc",
> "db_url", "mysql://openser:openserrw@localhost/openser")
> modparam("auth_db", "calculate_ha1", 1)
> modparam("auth_db", "password_column", "password")
> modparam("nathelper", "rtpproxy_disable", 1)
> modparam("nathelper", "natping_interval", 0)
> modparam("mediaproxy","natping_interval", 30)
> modparam("mediaproxy","mediaproxy_socket", "/var/run/mediaproxy.sock")
> modparam("mediaproxy","sip_asymmetrics","/usr/local/etc/ser/sip-clients")
> modparam("mediaproxy","rtp_asymmetrics","/usr/local/etc/ser/rtp-clients")
> modparam("usrloc", "db_mode", 2)
> modparam("usrloc", "use_domain", 1)
> modparam("registrar", "nat_flag", 6)
> modparam("registrar", "use_domain", 1)
> modparam("rr", "enable_full_lr", 1)
> modparam("tm", "fr_inv_timer", 27)
> modparam("tm", "fr_inv_timer_avp", "inv_timeout")
> modparam("permissions", "db_mode", 1)
> modparam("permissions", "trusted_table", "trusted")
> modparam("avpops", "avp_url",
> "mysql://openser:openserrw@localhost/openser")
> modparam("avpops", "avp_table", "usr_preferences")
> route {
> # -----------------------------------------------------------------
> # Sanity Check Section
> # -----------------------------------------------------------------
> if (!mf_process_maxfwd_header("10")) {
> sl_send_reply("483", "Too Many Hops");
> return;
> };
> if (msg:len > max_len) {
> sl_send_reply("513", "Message Overflow");
> return;
> };
> # -----------------------------------------------------------------
> # Record Route Section
> # -----------------------------------------------------------------
> if (method=="INVITE" && client_nat_test("3")) {
> # INSERT YOUR IP ADDRESS HERE
> record_route_preset("202.XX.61.XX:5060;nat=yes");
> } else if (method!="REGISTER") {
> record_route();
> };
> # -----------------------------------------------------------------
> # Call Tear Down Section
> # -----------------------------------------------------------------
> if (method=="BYE" || method=="CANCEL") {
> end_media_session();
> };
> # -----------------------------------------------------------------
> # Loose Route Section
> # -----------------------------------------------------------------
> if (loose_route()) {
> if (has_totag() && (method=="INVITE" || method=="ACK")) {
> if (client_nat_test("3")||search("^Route:.*;nat=yes")){
> setflag(6);
> use_media_proxy();
> };
> };
> route(1);
> return;
> };
> # -----------------------------------------------------------------
> # Call Type Processing Section
> # -----------------------------------------------------------------
> if (!is_uri_host_local()) {
> if (is_from_local() || allow_trusted()) {
> route(4);
> route(1);
> } else {
> sl_send_reply("403", "Forbidden");
> };
> return;
> };
> if (method=="CANCEL") {
> route(1);
> return;
> } else if (method=="INVITE") {
> route(3);
> return;
> } else if (method=="REGISTER") {
> route(2);
> return;
> };
> lookup("aliases");
> if (uri!=myself) {
> route(4);
> route(1);
> return;
> };
> if (!lookup("location")) {
> sl_send_reply("404", "User Not Found");
> return;
> };
> route(1);
> }
> route[1] {
> # -----------------------------------------------------------------
> # Default Message Handler
> # -----------------------------------------------------------------
> t_on_reply("1");
> if (!t_relay()) {
> if (method=="INVITE" || method=="ACK") {
> end_media_session();
> };
> sl_reply_error();
> };
> }
> route[2] {
> # -----------------------------------------------------------------
> # REGISTER Message Handler
> # -----------------------------------------------------------------
> sl_send_reply("100", "Trying");
> if (!search("^Contact:[ ]*\*") && client_nat_test("7")) {
> setflag(6);
> fix_nated_register();
> force_rport();
> };
> if (!www_authorize("","subscriber")) {
> www_challenge("","0");
> return;
> };
> if (!check_to()) {
> sl_send_reply("401", "Unauthorized");
> return;
> };
> consume_credentials();
> if (!save("location")) {
> sl_reply_error();
> };
> }
> route[3] {
> # -----------------------------------------------------------------
> # INVITE Message Handler
> # -----------------------------------------------------------------
> if (!allow_trusted()) {
> if (!proxy_authorize("","subscriber")) {
> proxy_challenge("","0");
> return;
> } else if (!check_from()) {
> sl_send_reply("403", "Use From=ID");
> return;
> };
> consume_credentials();
> };
> if (client_nat_test("3")) {
> setflag(7);
> force_rport();
> fix_nated_contact();
> };
> if (uri=~"^sip:1[0-9]{10}@") {
> strip(1);
> };
> lookup("aliases");
> if (uri!=myself) {
> route(4);
> route(1);
> return;
> };
> if (uri=~"^sip:011[0-9]*@") {
> route(4);
> route(5);
> return;
> };
> if (avp_db_load("$ruri/username", "$avp(s:callfwd)")) {
> setflag(22);
> avp_pushto("$ruri", "$avp(s:callfwd)");
> route(6);
> return;
> };
> if (!lookup("location")) {
> /*if (uri=~"^sip:[0-9]{10}@") {
> route(4);
> route(5);
> return;
> };*/
> sl_send_reply("404", "User Not Found");
> return;
> };
> if (avp_db_load("$ruri/username", "$avp(s:fwdbusy)")) {
> if (!avp_check("$avp(s:fwdbusy)", "eq/$ruri/i")) {
> setflag(26);
> };
> };
> if (avp_db_load("$ruri/username", "$avp(s:fwdnoanswer)")) {
> if (!avp_check("$avp(s:fwdnoanswer)", "eq/$ruri/i")) {
> setflag(27);
> };
> };
> t_on_failure("1");
> route(4);
> route(1);
> }
> route[4] {
> # -----------------------------------------------------------------
> # NAT Traversal Section
> # -----------------------------------------------------------------
> if (isflagset(6) || isflagset(7)) {
> if (!isflagset(8)) {
> setflag(8);
> use_media_proxy();
> };
> };
> }
> route[5] {
> # -----------------------------------------------------------------
> # PSTN Handler
> # -----------------------------------------------------------------
> rewritehost("216.168.162.97"); # INSERT YOUR PSTN GATEWAY IP ADDRESS
> avp_write("i:45", "$avp(s:inv_timeout)");
> t_on_failure("1");
> route(4);
> route(1);
> }
> route[6] {
> #
> ------------------------------------------------------------------------
> # Call Forwarding Reply Route Handler
> #
> # This must be done as a route block because sl_send_reply() cannot be
> # called from the failure_route block
> #
> ------------------------------------------------------------------------
> if (uri=~"^sip:1[0-9]{10}@") {
> strip(1);
> };
> lookup("aliases");
> if (!isflagset(22)) {
> append_branch();
> };
>
> if (uri!=myself) {
> route(4);
> route(1);
> return;
> };
> if (uri=~"^sip:011[0-9]*@") {
> route(4);
> route(5);
> return;
> };
> if (!lookup("location")) {
> /*if (uri=~"^sip:[0-9]{10}@") {
> route(4);
> route(1);
> return;
> };*/
> sl_send_reply("404", "User Not Found");
> return;
> };
> route(4);
> route(1);
> }
> onreply_route[1] {
> if ((isflagset(6) || isflagset(7)) &&
> (status=~"(180)|(183)|2[0-9][0-9]")) {
> if (!search("^Content-Length:[ ]*0")) {
> use_media_proxy();
> };
> };
> if (client_nat_test("1")) {
> fix_nated_contact();
> };
> }
> failure_route[1] {
> if (t_check_status("487")) {
> return;
> };
> if (isflagset(26) && t_check_status("486")) {
> if (avp_pushto("$ruri", "$avp(s:fwdbusy)")) {
> avp_delete("$avp(s:fwdbusy)");
> resetflag(26);
> route(6);
> return;
> };
> };
> if (isflagset(27) && t_check_status("408")) {
> if (avp_pushto("$ruri", "$avp(s:fwdnoanswer)")) {
> avp_delete("$avp(s:fwdnoanswer)");
> resetflag(27);
> route(6);
> return;
> };
> };
> end_media_session();
> }
>
>
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