![Push notifications
!15
Config
# Handle SIP registrations
route[REGISTRAR] {
if (!is_method("REGISTER"))
return;
!
if(isflagset(FLT_NATS))
{
setbflag(FLB_NATB);
# uncomment next line to do SIP NAT pinging
## setbflag(FLB_NATSIPPING);
}
if (!save("location"))
sl_reply_error();
!
route(PUSHJOIN);
exit;
}
!
!
!](https://image.slidesharecdn.com/c2egg6c2q4arztkraeex-signature-19d6e55773ce3cf11c8d11ec71e562686c1e280e5ea082c7f46c7e4be041f079-poli-140817123246-phpapp02/85/Aynchronous-Processing-in-Kamailio-Configuration-File-15-320.jpg)
![Push notifications
!16
Config
# do the PUSH notification
route[SENDPUSH] {
$var(luaret) = 0;
!
if(lua_runstring(“do_push([[$hdr(X-VxTo)]], [[$tU]], [[$hdr(X-VxFrom)]], [[$fU]], [[$ci]])")<0)
{
send_reply("501", "No link to destination");
exit;
}
if($var(luaret)!=1)
{
send_reply("501", "Unknown destination");
exit;
}
send_reply("110", "Push sent");
}
!
!
!](https://image.slidesharecdn.com/c2egg6c2q4arztkraeex-signature-19d6e55773ce3cf11c8d11ec71e562686c1e280e5ea082c7f46c7e4be041f079-poli-140817123246-phpapp02/85/Aynchronous-Processing-in-Kamailio-Configuration-File-16-320.jpg)
![Push notifications
!17
Config
# do push in async mode
route[PUSHASYNC] {
if (!is_method("INVITE"))
return;
!
if(registered("location"))
return;
!
route(SENDPUSH);
!
if(!t_suspend())
{
xlog("failed suspending trasaction [$T(id_index):$T(id_label)]n");
send_reply("501", "Unknown destination");
exit;
}
xdbg("suspended transaction [$T(id_index):$T(id_label)] $fU => $rUn");
$sht(vtp=>join::$rU) = "" + $T(id_index) + ":" + $T(id_label);
xdbg("htale key value [$sht(vtp=>join::$rU)]n");
exit;
}
!
!](https://image.slidesharecdn.com/c2egg6c2q4arztkraeex-signature-19d6e55773ce3cf11c8d11ec71e562686c1e280e5ea082c7f46c7e4be041f079-poli-140817123246-phpapp02/85/Aynchronous-Processing-in-Kamailio-Configuration-File-17-320.jpg)
![Push notifications
!18
Config
# join pending INVITE with the incoming REGISTER
route[PUSHJOIN] {
if (!is_method("REGISTER"))
return;
$var(hjoin) = 0;
lock("$tU");
$var(hjoin) = $sht(vtp=>join::$tU);
$sht(vtp=>join::$tU) = $null;
unlock("$tU");
if($var(hjoin)==0)
return;
$var(id_index) = $(var(hjoin){s.select,0,:}{s.int});
$var(id_label) = $(var(hjoin){s.select,1,:}{s.int});
xdbg("resuming trasaction [$var(id_index):$var(id_label)] $tU ($var(hjoin))n");
t_continue("$var(id_index)", "$var(id_label)", "LOCATION");
}
!](https://image.slidesharecdn.com/c2egg6c2q4arztkraeex-signature-19d6e55773ce3cf11c8d11ec71e562686c1e280e5ea082c7f46c7e4be041f079-poli-140817123246-phpapp02/85/Aynchronous-Processing-in-Kamailio-Configuration-File-18-320.jpg)
![!21
Proxy Server Config
onreply_route[ACC] {
if(status!="200")
return;
$uac_req(method)="ACCOUNTING";
$uac_req(ruri)="sip:store@accounting.kamailio.org;transport=sctp";
$uac_req(furi)="sip:server@server1.kamailio.org";
$uac_req(hdrs)="Content-Type: text/accounting-csvrn";
pv_printf(“$uac_req(body)”, "$TS,$ci,$ft,$tt,$T_req($fu),$T_req($ru)");
uac_send_req();
}](https://image.slidesharecdn.com/c2egg6c2q4arztkraeex-signature-19d6e55773ce3cf11c8d11ec71e562686c1e280e5ea082c7f46c7e4be041f079-poli-140817123246-phpapp02/85/Aynchronous-Processing-in-Kamailio-Configuration-File-21-320.jpg)
![!26
SIPWEET
Config
!
# Twitter routing
route[SIPWEET] {
# consume tweeties
while(mq_fetch("sipweet"))
{
xlog("Tweeting to $mqk(sipweet) [[$mqv(sipweet)]]n");
!
# get twitter user
sql_query("ca",
"select twuser from sipweetusers where sipuser='$mqk(sipweet)'",
"ra");
if($dbr(ra=>rows)>0)
{
$var(twuser) = $dbr(ra=>[0,0]);
$var(twmsg) = $mqv(sipweet);
if(!lua_runstring("sipweetdm([[$var(twuser)]], [[$var(twmsg)]])"))
{
xdbg("failed to send dm to: $mqk(sipweet) - $var(twuser)!n");
}
}
}
}](https://image.slidesharecdn.com/c2egg6c2q4arztkraeex-signature-19d6e55773ce3cf11c8d11ec71e562686c1e280e5ea082c7f46c7e4be041f079-poli-140817123246-phpapp02/85/Aynchronous-Processing-in-Kamailio-Configuration-File-26-320.jpg)
![!27
SIPWEET
Config
!
# Twitees queuing
route[TWQUEUE] {
if(!is_method("INVITE"))
return;
mq_add("sipweet", "$rU", "Missed call from $fU ($Tf)");
}
!
route {
...
if(!lookup(“location”)) {
route(TWQUEUE);
t_newtran();
t_reply("404", "Not Found");
exit;
}
...
}](https://image.slidesharecdn.com/c2egg6c2q4arztkraeex-signature-19d6e55773ce3cf11c8d11ec71e562686c1e280e5ea082c7f46c7e4be041f079-poli-140817123246-phpapp02/85/Aynchronous-Processing-in-Kamailio-Configuration-File-27-320.jpg)
Aynchronous Processing in Kamailio Configuration File
- 1. Kamailio SIP Server async processing in config ! ! www.kamailio.org Daniel-Constantin Mierla Co-Founder Kamailio @miconda ! www.asipto.com
- 2. !2 What’s the issue? avoid blocking operations ! !
- 3. !3 The benefit? ! ! increase the performance
- 4. !4 Performance? ! not an issue for kamailio ! ! ! thank you! ! Questions?
- 5. !5 But then … • Interaction with database • sometimes you must wait • sometimes is not that real-time critical ! • DNS • dns is down, internet is down ! • Interaction with other external systems • rating engine - billing systems
- 7. !7 Application design ! multi-process application ! not multi-threading ! dedicated processes for " main attendant " tcp attendant " sip tcp receivers " sip udp receivers " sip sctp receivers " control interface " FIFO receiver " DATAGRAM/UDP receiver " XMLRPC receiver " timers " main timers (sip retransmissions) " dedicated timers " custom timers " special handling " custom processing
- 8. !8 Blocking task delegation to another process INVITE X REQUEST IN INVITE X PROCESSING FORWARD INVITE X READ SIP MESSAGE READ SIP MESSAGE read from message queue KAMAILIOPROCESSA KAMAILIOPROCESSB blocking task process task read from message queue process task message queue
- 9. !9 USERS USERS sip routing node Blocking task delegation to another instance dedicated processing node sip sip sip
- 11. !11 Cases ! ! Impacting SIP routing ! • need to wait for async task to finish • suspend sip message processing • handle other SIP messages • when async task done, resume processing of suspended message ! No impact on SIP routing ! • unrelated event • can be pushed out of SIP handling process and that’s a;; !
- 12. !12 • TMX • suspend-resume transaction • UAC • send custom messages from kamailio config • ASYNC • asynchronous execution of routing blocks • asynchronous sleep • MQUEUE • internal message queue • RTIMER • create custom processes that can react on timer • JSONRPC-C • send json-rpc commands and process responses asynchronously • EVAPI • publishing event messages via tcp and process responses asynchronously evapi_relay(“{ "event": "test",n "data": { "fU": "$fU" }n}");
- 13. Send push notifications ! - suspend invite - resume on registration -
- 14. Push notifications !14 Config # ----- htable params ----- modparam("htable", "db_url", DBURL) modparam("htable", "htable", "vtp=>size=10;autoexpire=120;dbtable=htable;dbmode=1") modparam("htable", "htable",“a=>size=6;") ! request_route { … # send the push route(PUSHAYASYNC); ! # user location service route(LOCATION); } ! !
- 15. Push notifications !15 Config # Handle SIP registrations route[REGISTRAR] { if (!is_method("REGISTER")) return; ! if(isflagset(FLT_NATS)) { setbflag(FLB_NATB); # uncomment next line to do SIP NAT pinging ## setbflag(FLB_NATSIPPING); } if (!save("location")) sl_reply_error(); ! route(PUSHJOIN); exit; } ! ! !
- 16. Push notifications !16 Config # do the PUSH notification route[SENDPUSH] { $var(luaret) = 0; ! if(lua_runstring(“do_push([[$hdr(X-VxTo)]], [[$tU]], [[$hdr(X-VxFrom)]], [[$fU]], [[$ci]])")<0) { send_reply("501", "No link to destination"); exit; } if($var(luaret)!=1) { send_reply("501", "Unknown destination"); exit; } send_reply("110", "Push sent"); } ! ! !
- 17. Push notifications !17 Config # do push in async mode route[PUSHASYNC] { if (!is_method("INVITE")) return; ! if(registered("location")) return; ! route(SENDPUSH); ! if(!t_suspend()) { xlog("failed suspending trasaction [$T(id_index):$T(id_label)]n"); send_reply("501", "Unknown destination"); exit; } xdbg("suspended transaction [$T(id_index):$T(id_label)] $fU => $rUn"); $sht(vtp=>join::$rU) = "" + $T(id_index) + ":" + $T(id_label); xdbg("htale key value [$sht(vtp=>join::$rU)]n"); exit; } ! !
- 18. Push notifications !18 Config # join pending INVITE with the incoming REGISTER route[PUSHJOIN] { if (!is_method("REGISTER")) return; $var(hjoin) = 0; lock("$tU"); $var(hjoin) = $sht(vtp=>join::$tU); $sht(vtp=>join::$tU) = $null; unlock("$tU"); if($var(hjoin)==0) return; $var(id_index) = $(var(hjoin){s.select,0,:}{s.int}); $var(id_label) = $(var(hjoin){s.select,1,:}{s.int}); xdbg("resuming trasaction [$var(id_index):$var(id_label)] $tU ($var(hjoin))n"); t_continue("$var(id_index)", "$var(id_label)", "LOCATION"); } !
- 21. !21 Proxy Server Config onreply_route[ACC] { if(status!="200") return; $uac_req(method)="ACCOUNTING"; $uac_req(ruri)="sip:[email protected];transport=sctp"; $uac_req(furi)="sip:[email protected]"; $uac_req(hdrs)="Content-Type: text/accounting-csvrn"; pv_printf(“$uac_req(body)”, "$TS,$ci,$ft,$tt,$T_req($fu),$T_req($ru)"); uac_send_req(); }
- 22. !22 Acc Server Config request_route { if(method=="ACCOUNTING" && $rU="store") { sql_query("ca", "insert into accounting (timeval,callid,ftag,ttag,src,dst) values ('$(rb{s.select,0,,})', '$(rb{s.select,1,,})', '$(rb{s.select,2,,})', '$(rb{s.select,3,,})', '$(rb{s.select,4,,})', '$(rb{s.select,5,,})' )", "ra"); send_reply("200", "Stored"); } }
- 23. !23 SIPWEET
- 24. !24 SIPWEET Design ! • Lua twitter library • Twitter operation is an HTTP request • can take some time to be processed • we cannot afford that when processing SIP signaling • solution: use asynchronous processing • config file message queue • dedicated process for twitter operations • Kamailio modules • app_lua • mqueue • rtimer • sqlops Sample implementation • notification of a missed call • use of Twitter direct message
- 25. !25 SIPWEET Config ! loadmodule "app_lua.so" loadmodule "rtimer.so" loadmodule "sqlops.so" loadmodule “mqueue.so” ! # ----- app_lua ----- modparam("app_lua", "load", "/usr/local/etc/kamailio/lua/sipweet.lua") ! # ----- rtimer ----- modparam("rtimer", "timer", "name=sipweet;interval=10;mode=1;") modparam("rtimer", "exec", "timer=sipweet;route=SIPWEET;") ! # ----- sqlops ----- modparam("sqlops","sqlcon", "ca=>mysql://openser:openserrw@localhost/openser") ! # ----- mqueue ----- modparam("mqueue", "mqueue", "name=sipweet")
- 26. !26 SIPWEET Config ! # Twitter routing route[SIPWEET] { # consume tweeties while(mq_fetch("sipweet")) { xlog("Tweeting to $mqk(sipweet) [[$mqv(sipweet)]]n"); ! # get twitter user sql_query("ca", "select twuser from sipweetusers where sipuser='$mqk(sipweet)'", "ra"); if($dbr(ra=>rows)>0) { $var(twuser) = $dbr(ra=>[0,0]); $var(twmsg) = $mqv(sipweet); if(!lua_runstring("sipweetdm([[$var(twuser)]], [[$var(twmsg)]])")) { xdbg("failed to send dm to: $mqk(sipweet) - $var(twuser)!n"); } } } }
- 27. !27 SIPWEET Config ! # Twitees queuing route[TWQUEUE] { if(!is_method("INVITE")) return; mq_add("sipweet", "$rU", "Missed call from $fU ($Tf)"); } ! route { ... if(!lookup(“location”)) { route(TWQUEUE); t_newtran(); t_reply("404", "Not Found"); exit; } ... }
- 28. !28 SIPWEET Database table ! CREATE TABLE `sipweetusers` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `twuser` varchar(64) NOT NULL, `sipuser` varchar(64) NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY (`twuser`), UNIQUE KEY (`sipuser`) ); mysql> select * from sipweetusers; +----+---------+---------+ | id | twuser | sipuser | +----+---------+---------+ | 1 | miconda | 101 | +----+---------+---------+
- 29. !29 SIPWEET Lua script ! -- SIPweet ! -- loading module require("twitter") ! local initialized = 0 local mytw ! function sipweetinit() if initialized == 0 then mytw = twitter.client("Consumer Key", "Consumer Secret", "OAuth Token", "OAuth Token Secret"); initialized = 1 end end ! function sipweetdm(userid, message) sipweetinit() mytw:sendMessage{ user = userid, text = message } end
- 30. !30 SIPWEET ! ! And the messages goes ... ! • nice and quick to the twitter client !