webrtc（2）：Centos6 安装 stun/turn服务

本文的原文连接是: http://blog.csdn.net/freewebsys/article/details/47109183 未经博主允许不得转载。

1，关于stun和turn

STUN（Simple Traversal of UDP over NATs，NAT 的UDP简单穿越）是一种网络协议，它允许位于NAT（或多重NAT）后的客户端找出自己的公网地址，查出自己位于哪种类型的NAT之后以及NAT为某一个本地端口所绑定的Internet端端口。这些信息被用来在两个同时处于NAT 路由器之后的主机之间建立UDP通信。该协议由RFC 3489定义。目前RFC 3489协议已被RFC 5389协议所取代，新的协议中，将STUN定义为一个协助穿越NAT的工具，并不独立提供穿越的解决方案。它还有升级版本RFC 7350，目前正在完善中。
http://baike.baidu.com/view/884586.htm

TURN的全称为Traversal Using Relay NAT，即通过Relay方式穿越NAT，TURN应用模型通过分配TURNServer的地址和端口作为客户端对外的接受地址和端口，即私网用户发出的报文都要经过TURNServer进行Relay转发。
http://baike.baidu.com/subview/351571/10359693.htm

2，安装

参考：
http://www.hankcs.com/program/network/compile-rfc5766-turn-server-to-build-turn-server.html

代码下载：
https://github.com/coturn/rfc5766-turn-server/releases
下载最新的tar.gz包。rfc5766-turn-server-3.2.5.9.tar.gz

安装依赖环境

##ssl 需要yum安装
yum install openssl openssl-libs libevent libevent-devel

如果还是报错，就手动安装libevent。

centos Libevent2 development libraries are not installed properly in required location

下载：http://libevent.org/ 官网，下载
https://sourceforge.net/projects/levent/files/libevent/libevent-2.0/libevent-2.0.22-stable.tar.gz
然后解压缩编译安装即可

编译turn-server

tar -zxvf rfc5766-turn-server-3.2.5.9.tar.gz
cd rfc5766-turn-server-3.2.5.9
./configure 
make
make install

configure成功：

more is /usr/bin/more
install is /usr/bin/install
pkill is /usr/bin/pkill
Use TMP dir /var/tmp
Compiler: cc
Do not use -lsocket
Do not use -lwldap32
Do not use -lwldap64
Do not use -lintl
Sockets code is fine: no sin_len field present
Ignore IP_RECVERR
Crypto SSL lib found.
SSL lib found.
Libevent2 development found.
Libevent2 runtime found.
Libevent2 openssl found.
Libevent2 pthreads found.

POSTGRESQL DEVELOPMENT LIBRARY (libpq.a) AND/OR HEADER (libpq-fe.h)
        ARE NOT INSTALLED PROPERLY ON THIS SYSTEM.
        THAT'S OK BUT THE TURN SERVER IS BUILDING WITHOUT POSTGRESQL DATABASE SUPPORT.


MYSQL DEVELOPMENT LIBRARY (libmysqlclient) AND/OR HEADER (mysql.h)
        ARE NOT INSTALLED PROPERLY ON THIS SYSTEM.
        THAT'S OK BUT THE TURN SERVER IS BUILDING WITHOUT MYSQL DATABASE SUPPORT.


HIREDIS DEVELOPMENT LIBRARY (libhiredis.*) AND/OR HEADERS (hiredis/*.h)
        ARE NOT INSTALLED PROPERLY ON THIS SYSTEM.
        THAT'S OK BUT THE TURN SERVER IS BUILDING WITHOUT REDIS SUPPORT.

PREFIX=/usr/local OSLIBS= -L/usr/local/lib/ -L/usr/local/lib/ -L/usr/local/lib64/ -L/usr/local/lib64/ -lrt -pthread -lcrypto -lssl -levent_core -levent_openssl -levent_pthreads  -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib64/ -Wl,-rpath,/usr/local/lib64/ -Wl,-rpath,/usr/lib64/mysql -Wl,-rpath,/usr/local/lib DBLIBS= OSCFLAGS=-g  -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include  -DTURN_HAS_DAEMON    -DINSTALL_PREFIX=/usr/local DBCFLAGS=

只是说没有数据库支持的库，暂时不需要。

安装之后说明：

1) If you system supports automatic start-up system daemon services, 
the, to enable the turnserver as an automatically started system 
service, you have to:

        a) Create and edit /etc/turnserver.conf or 
        /usr/local/etc/turnserver.conf . 
        Use /usr/local/etc/turnserver.conf.default as an example.

        b) For user accounts settings, if using the turnserver 
        with authentication: create and edit /etc/turnuserdb.conf 
        file, or set up PostgreSQL or MySQL or Redis database for user accounts.
        Use /usr/local/etc/turnuserdb.conf.default as example for flat file DB,
        or use /usr/local/share/turnserver/schema.sql as SQL database schema,
        or use /usr/local/share/turnserver/schema.userdb.redis as Redis
        database schema description and/or /usr/local/share/turnserver/schema.stats.redis
        as Redis status & statistics database schema description.

        c) add whatever is necessary to enable start-up daemon for the /usr/local/bin/turnserver.

2) If you do not want the turnserver to be a system service, 
   then you can start/stop it "manually", using the "turnserver" 
   executable with appropriate options (see the documentation).

3) To create database schema, use schema in file /usr/local/share/turnserver/schema.sql.

4) For additional information, run:

   $ man turnserver
   $ man turnadmin
   $ man turnutils

在根目录创建一个user.db文件
使用turnserver启动：

turnserver --userdb /root/turnuser.db 
里面是webrtc用户名密码：
webrtc:secret

3，页面调用

https://github.com/EricssonResearch/openwebrtc-examples/tree/master/web
安装node参考之前文章：
http://blog.csdn.net/freewebsys/article/details/46649667#t1

修改main.js

// must use 'url' here since Firefox doesn't understand 'urls'
var configuration = {
  "iceServers": [
  {
    "url": "stun:mmt-stun.verkstad.net"
  },
  {
    "url": "turn:mmt-turn.verkstad.net",
    "username": "webrtc",
    "credential": "secret"
  }
  ]
};

将stun服务器和turn服务器替换。

4，总结