Kamailio是一个开源的SIP服务器，原名OpenSER
Kamailio is an Open Source, GPL2, SIP Server Routing Platform. It is written in C for Linux/Unix plaforms and focuses on performance, flexibility and security.
On Nov 04, 2008, Kamailio and SIP Express Router have started the SIP Router Project.
Kamailio 诞生于 2005 年 7 月，它是从德国 FhG FOKUS 研究所主导的 SIP Express Router(SER) 项目组分裂出来的。新项目建立的目标是创建一个开放的开发环境，以建立一个强大的可扩展的开源 SIP 服务器。Kamailio 是个纯粹的 SIP 服务器，它可以作为 PROXY、注册服务器、重定向服务器，也可作为简单的 PRESENCE 服务器。
Web links
Home page with new project name: http://www.kamailio.org
Home page with old project name: http://www.openser-project.org
SourceForge.net Project page: http://sourceforge.net/projects/openser/
Features
SIP proxy/registrar/redirect server (RFC3261, RFC3263)
UDP/TCP/TLS/SCTP support
Transactional stateful proxy
Modular architecture
Programmable configuration file
ENUM support
Call Processing Language (CPL)
Gateway to sms or xmpp
Authentication, authorization and accounting via Radius or database
NAT traversal system
Least cost routing
Load balancing
Carrier routing
Multiple database backends: MySQL, Postgres, Oracle, BDB or flat files
SIMPLE Presence Server (IETF SIMPLE extensions - rich presence)
Dialog Info Presence - SLA/BLA
XCAP and RLS
Presence User Agent
Dialog Stateful Proxy
Instant Messaging
Offline message storage
Instant messaging conferencing
SNMP support
Perl Programming Interface
Java SIP Servlet Application server
Over 80 modules (extensions)
Documentation
Main Documentation Page - http://www.kamailio.org/docs/
Dokuwiki Page - http://www.kamailio.org/dokuwiki/
我们使用Kamailio主要用在SIP dispatcher server，即SIP redirect server 安装及配置手册如下
一．安装 1．依赖包： libmysqlclient & libz (zlib) ：mysql DB support (the db_mysql module) Shared libraries
MySQL-shared-5.1.32-0.glibc23.i386.rpm
MySQL-devel-community-5.1.32-0.rhel5.i386.rpm
libxml2：cpl-c (Call Processing Language) or the presence modules (presence and pua*) libperl：perl scripting from you config file (perl module) 2．源代码安装 make，make modules，make install 或者make all，make install 参考： 3．启动：kamctl start 4．重启：kamctl restart 5．监控服务状态：kamctl moni 6．MySQL配置： 1）安装： edit Makefile.var files to include the MySQL module vim Makefile.vars Uncomment the next line in the file: MODS_MYSQL=on cp /usr/local/lib/mysql/libmysqlclient.so.16 /usr/lib
Edit now /usr/local/etc/kamailio/kamctlrc and add: DBENGINE=MYSQL SIP_DOMAIN=pryko.com 6.1 创建数据库：kamdbctl create 6.2管理员登录：user ‘admin’ with password ‘ openserrw ‘ 6.3 添加用户：kamctl add 6.4 默认值：database url, users and passwords - DEFAULT_DB_URL=”mysql://opensips:opensipsrw@localhost/opensips” - r/w user: openser; passwd: openserrw - r/o user: openserro; passwd: openserro
二．配置 1．配置文件 kamailio.cfg /usr/local/etc/kamailio/kamailio.cfg 2．配置文件 kamctlrc /usr/local/etc/kamailio/kamctlrc
三．脚本 参考文档： Kamailio Wiki http://www.kamailio.com/dokuwiki Cookbooks and Reference http://www.kamailio.com/dokuwiki/doku.php/core-cookbook:1.5.x Kamalio 1.5.x Module Functions Index http://www.kamailio.com/dokuwiki/doku.php/modules:1.5.x:index-functions
四．负载均衡Load Balancing 参考：http://www.kamailio.org/dokuwiki/doku.php/asterisk:load-balancing-and-ha 4.1配置文件 kamailio.cfg loadmodule(“dispatcher.so”) modparam(“dispatcher”, “list_file”, “/usr/local/etc/kamailio/dispatcher.list”) modparam(“dispatcher”, “force_dst”, 1) 4.2 —dispatcher.list----文件
1 sip:221.5.152.171:5060 1 sip:221.5.152.170:5060 4.3 kamctl命令：kamctl dispatcher show -- command ‘dispatcher’ - manage dispatcher Examples: dispatcher addgw 1 sip:1.2.3.1:5050 1 ‘outbound gateway’ dispatcher addgw 2 sip:1.2.3.4:5050 3 ‘’ * dispatcher rmgw 4 dispatcher show ..................... show dispatcher gateways dispatcher reload ................... reload dispatcher gateways dispatcher dump ..................... show in memory dispatcher gateways dispatcher addgw .......................... add gateway dispatcher rmgw................ delete gateway
查看载入的配置：kamctl dispatcher dump 修改后重新载入配置：kamctl dispatcher reload
如需使用，需安装MySQL-client-community-5.1.32-0.rhel5.i386.rpm 否则报错：ERROR: This command requires a database engine - none was loaded
五．与Asterisk对接负载均衡 注意事项：sip.conf 注释如下行 ;canreinvite=no ; Asterisk by default tries to redirect
Asterisk#1 10.10.10.56 配置sip.conf [5000] type=friend ;username=5000 secret=5000_phone2 callerid=5000 qualify=yes ; Qualify peer is no more than 2000 ms away nat=no ; This phone is natted host=dynamic ; This device registers with us ;canreinvite=no ; Asterisk by default tries to redirect 配置extension.conf [default] exten => 6000,1,Dial(SIP/6000@10.10.10.57,60) exten => 5000,1,Dial(SIP/5000,60)
Asterisk#2 10.10.10.57 配置sip.conf [6000] type=friend ;username=6000 secret=6000_phone2 callerid=6000 qualify=yes ; Qualify peer is no more than 2000 ms away nat=no ; This phone is natted host=dynamic ; This device registers with us ;canreinvite=no ; Asterisk by default tries to redirect 配置extension.conf [default] exten => 6000,1,Dial(SIP/6000,60) exten => 5000,1,Dial(SIP/5000@10.10.10.136,60)
Kamailio 10.10.10.136 配置kamailio.cfg … loadmodule “dispatcher.so” modparam(“dispatcher”, “list_file”, “/usr/local/etc/kamailio/dispatcher.list”) … route{ if ( !mf_process_maxfwd_header(“10”) ) { sl_send_reply(“483”,”To Many Hops”); drop(); }; ds_select_dst(“1”, “0”); forward(); } 配置dispatcher.list
1 sip:10.10.10.56:5060
测试 ： 登录10.10.10.57上的6000，登录10.10.10.56上的5000 从6000呼叫5000，会呼叫10.10.10.136上的5000，10.136重定向到10.56
六．按号码段重定向网关 配置kamailio.cfg 使用正则表达式 route{ if (!mf_process_maxfwd_header(“10”)) { sl_send_reply(“483”,”Too Many Hops”); exit; } if (uri=~”^sip:5[0-9]+@10.10.10.136$”) { if (is_method(“INVITE”)) { ds_select_dst(“1”, “0”); forward(); exit; } } if (uri=~”^sip:8[0-9]+@10.10.10.136$”) { if (is_method(“INVITE”)) { ds_select_dst(“2”, “0”); forward(); exit; } } sl_send_reply(“404”,”Not here”); exit; } 配置dispatcher.list
1 sip:10.10.10.56:5060 #1 2 sip:10.10.10.54:5060
测试 ： 登录10.10.10.57上的6000，登录10.10.10.56上的5000 从6000呼叫5000，会呼叫10.10.10.136上的5000，10.136重定向到10.56 从6000呼叫8002，会呼叫10.10.10.136上的8002，10.136重定向到10.54
