All, The Kamailio-Asterisk integration that is described here asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb [Asipto - SIP and VoIP Knowledge Base Site] is limited to Asterisk servers with a fixed IP address. The reason is that Kamailio identifies and authorizes traffic from Asterisk based on the source IP address. Attached is a patch to kamailio.cfg that adds support for dynamic Asterisk hosts. It introduces the option to define a fully-qualified domain name instead of the IP address to identify the Asterisk server. The host name can be dynamically updated to always point at the (changing) IP address of the Asterisk server. Defining WITH_ASTERISK_FQDN enables the new option. When WITH_ASTERISK_FQDN is set, Kamailio will perform a DNS search on the host name in the asterisk.bindhost variable. It will authorize incoming traffic if it originates from one of the IP addresses the DNS lookup returns (and matches the asterisk.bindport variable as before). Furthermore, the patch introduce the option to automatically set the IP address of the server that Kamailio is running on. This does away with the need to properly define kamailio.bindip on every server that the configuration is running on. This option is enabled by defining WITH_AUTOIP. With the suggested changes I have been able to successfully run an Asterisk server in my home, having a dynamic public IP address and connecting to the Kamailio proxy on a VPS server with a static IP addres. Please let me know if you have any comments or suggestions. Kind regards,Rudy Eschauzier.
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--- kamailio.cfg-AST-ORG 2015-07-25 11:56:38.517743705 +0200 +++ kamailio.cfg 2015-08-16 18:11:31.709043036 +0200 @@ -1,9 +1,14 @@ #!KAMAILIO # #!define WITH_MYSQL -# #!define WITH_AUTH +#!define WITH_AUTH # #!define WITH_USRLOCDB -# #!define WITH_ASTERISK +#!define WITH_ASTERISK +#!define WITH_ASTERISK_FQDN +#!define WITH_AUTOIP +# #!define WITH_DEBUG +#!define WITH_NAT +#!define WITH_TEXTDB # # Kamailio (OpenSER) SIP Server v4.0 - default configuration script @@ -23,6 +28,9 @@ # *** To enable mysql: # - define WITH_MYSQL # +# *** To use text database backend: +# - define WITH_TEXTDB +# # *** To enable authentication execute: # - enable mysql # - define WITH_AUTH @@ -47,6 +55,7 @@ # - install RTPProxy: http://www.rtpproxy.org # - start RTPProxy: # rtpproxy -l _your_public_ip_ -s udp:localhost:7722 +# - option for NAT SIP OPTIONS keepalives: WITH_NATSIPPING # # *** To enable PSTN gateway routing execute: # - define WITH_PSTN @@ -86,6 +95,14 @@ # - set the value of voicemail.srv_ip # - adjust the value of voicemail.srv_port # +# *** To enable Asterisk hostname lookup execute (for dynamic IPs): +# - define WITH_ASTERISK_FQDN +# - set the value of asterisk.bindhost +# +# *** To enable automatically looking up Kamailio server IP: +# - define WITH_AUTOIP +# - set the value of kamailio.bindport +# # *** To enhance accounting execute: # - enable mysql # - define WITH_ACCDB @@ -116,6 +133,12 @@ #!define DBASTURL "mysql://asterisk:asterisk_password@localhost/asterisk" #!endif #!endif +#!ifdef WITH_TEXTDB +#!define DBURL "text:///etc/kamailio/dbtext" +#!ifdef WITH_ASTERISK +#!define DBASTURL "text:///etc/kamailio/dbtext" +#!endif +#!endif #!ifdef WITH_MULTIDOMAIN # - the value for 'use_domain' parameters #!define MULTIDOMAIN 1 @@ -135,7 +158,7 @@ #!define FLB_NATSIPPING 7 ####### Global Parameters ######### - + #!ifdef WITH_DEBUG debug=4 log_stderror=yes @@ -143,7 +166,7 @@ debug=2 log_stderror=no #!endif - + memdbg=5 memlog=5 @@ -205,26 +228,35 @@ voicemail.srv_port = "5060" desc "VoiceMail Port" #!endif - #!ifdef WITH_ASTERISK -asterisk.bindip = "192.168.178.25" desc "Asterisk IP Address" -asterisk.bindport = "5080" desc "Asterisk Port" -kamailio.bindip = "192.168.178.25" desc "Kamailio IP Address" +asterisk.bindip = "XX.XX.XX.XX" desc "Asterisk IP Address" +# asterisk.bindport = "5080" desc "Asterisk Port" +asterisk.bindport = "5060" desc "Asterisk Port" +kamailio.bindip = "XX.XX.XX.XX" desc "Kamailio IP Address" kamailio.bindport = "5060" desc "Kamailio Port" #!endif - + +#!ifdef WITH_ASTERISK_FQDN +asterisk.bindhost = "ddns.example.com" desc "Asterisk Host Name" +#!endif + ####### Modules Section ######## # set paths to location of modules (to sources or installation folders) #!ifdef WITH_SRCPATH mpath="modules_k:modules" #!else -mpath="/usr/local/lib/kamailio/modules_k/:/usr/local/lib/kamailio/modules/" +mpath="usr/lib64/kamailio/modules/:/usr/local/lib/kamailio/modules_k/:/usr/local/lib/kamailio/modules/" #!endif #!ifdef WITH_MYSQL loadmodule "db_mysql.so" #!endif + +#!ifdef WITH_TEXTDB +loadmodule "db_text.so" +#modparam("db_text", "db_mode", 1) +#!endif loadmodule "mi_fifo.so" loadmodule "kex.so" @@ -291,10 +323,14 @@ #!ifdef WITH_DEBUG loadmodule "debugger.so" #!endif - + #!ifdef WITH_ASTERISK loadmodule "uac.so" +loadmodule "ipops.so" #!endif + +modparam("ctl", "user", "kamailio") +modparam("ctl", "group", "kamailio") # ----------------- setting module-specific parameters --------------- @@ -543,7 +579,6 @@ route[RELAY] { - # enable additional event routes for forwarded requests # - serial forking, RTP relaying handling, a.s.o. if (is_method("INVITE|SUBSCRIBE")) { @@ -641,12 +676,14 @@ if(isflagset(FLT_NATS)) { setbflag(FLB_NATB); - # uncomment next line to do SIP NAT pinging - ## setbflag(FLB_NATSIPPING); +#!ifdef WITH_NATSIPPING + # do SIP NAT pinging + setbflag(FLB_NATSIPPING); +#!endif } if (!save("location")) sl_reply_error(); - + #!ifdef WITH_ASTERISK route(REGFWD); #!endif @@ -953,16 +990,49 @@ #!ifdef WITH_ASTERISK # Test if coming from Asterisk route[FROMASTERISK] { +#!ifdef WITH_ASTERISK_FQDN + if ($sp!=$sel(cfg_get.asterisk.bindport)) + return -1; + + if(dns_query($sel(cfg_get.asterisk.bindhost), "dns")) + { + xdbg(" number of addresses: $dns(dns=>count)\n"); + $var(r) = 0; + $var(i) = 0; + while($var(i)<$dns(dns=>count) && !$var(r)) + { + xdbg(" #[$var(i)] type ($dns(dns=>type[$var(i)]))" + " addr [$dns(dns=>addr[$var(i)])]\n"); + $var(r)=$si==$dns(dns=>addr[$var(i)]); + $var(i) = $var(i) + 1; + } + xdbg("Result: $var(r)"); + if ($var(r)) + return 1; + return -1; + } + else + { + xlog("L_ERROR","Host lookup $sel(cfg_get.asterisk.bindhost) failed"); + return -1; + } +#!else if($si==$sel(cfg_get.asterisk.bindip) && $sp==$sel(cfg_get.asterisk.bindport)) return 1; return -1; +#!endif } # Send to Asterisk route[TOASTERISK] { +#!ifdef WITH_ASTERISK_FQDN + $du = "sip:" + $sel(cfg_get.asterisk.bindhost) + ":" + + $sel(cfg_get.asterisk.bindport); +#!else $du = "sip:" + $sel(cfg_get.asterisk.bindip) + ":" + $sel(cfg_get.asterisk.bindport); +#!endif route(RELAY); exit; } @@ -973,14 +1043,25 @@ { return; } +#!ifdef WITH_ASTERISK_FQDN + $var(rip) = $sel(cfg_get.asterisk.bindhost); +#!else $var(rip) = $sel(cfg_get.asterisk.bindip); +#!endif $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 + "@" +#!ifdef WITH_AUTOIP + xdbg("IP address of server: $HN(i)"); + $uac_req(hdrs)="Contact: <sip:" + $au + "@" + + $HN(i) + + ":" + $sel(cfg_get.kamailio.bindport) + ">\r\n"; +#!else + $uac_req(hdrs)="Contact: <sip:" + $au + "@" + $sel(cfg_get.kamailio.bindip) + ":" + $sel(cfg_get.kamailio.bindport) + ">\r\n"; +#!endif if($sel(contact.expires) != $null) $uac_req(hdrs)= $uac_req(hdrs) + "Expires: " + $sel(contact.expires) + "\r\n"; else
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