wifidog 是一种开源的用来做无线认证的协议，集成到路由器或者网关中，对于连接到路由器或者网关的设备，使其先登录云端认证服务器，然后通过认证才能上网。比如在星巴克上网，浏览器会先弹出一个广告页面，我们输入手机号，获取验证码，然后就可以上网了。
wifidog 官方网站给出了下载路径：
openwrt wifidog 及auth server：http://dev.wifidog.org/wiki/Download
wifidog 及auth server 源码下载及安装：http://dev.wifidog.org/wiki/doc
wifidog 编译编译教程 http://www.wifidog.pro/2015/03/20/Ubuntu%E4%B8%8B%E7%BC%96%E8%AF%91WifiDog%E7%A8%8B%E5%BA%8F.html
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安装了wifidog 的linux系统，在启动wifidog之后，可能会爆错误："wifidog auth server is not set", 在wifidog的源码conf.c中找到：
static void
config_notnull(const void *parm, const char *parmname)
{
if (parm == NULL) {
debug(LOG_ERR, "%s is not set", parmname);
missing_parms = 1;
}
}
这个函数在调用：
void
config_validate(void)
{
config_notnull(config.gw_interface, "GatewayInterface");
config_notnull(config.auth_servers, "AuthServer");
if (missing_parms) {
debug(LOG_ERR, "Configuration is not complete, exiting...");
exit(-1);
}
}
而config_validate是在gataway.c的main里被调用：
config_init();
parse_commandline(argc, argv);
/* Initialize the config */
config_read(config->configfile);
config_validate();
整个config 设置的流程就是，先把默认值设置给全局变量config，然后将wifidog 的命令行参数传给config，然后是读wifidog的配置文件设置config，最后检查config参数是否有效，只要检查gateway interface和AuthServer。
在config_init中gw_interface和auth_servers初始化为NULL，也就是没有值；在命令行里也没有支持gw_interface和auth_servers的命令参数，所以我们可以通过修改wifidog.conf 的配置来最简单的解决上述问题。
GatewayInterface eth0
AuthServer {
Hostname 192.168.33.131
SSLAvailable no
Path /
}
另外我们也可以通过给wifidog 添加命令行参数来实现，这里就不详述了。
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openwrt 安装 wifidog
1.ssh到路由器：ssh username@ip
2.opkg update
3.opkg install wifidog
4.配置：vi /etc/wifidog.conf
5.设置开机启动：/etc/init.d/wifidog enable
6.启用:/etc/init.d/wifidog start
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Install prerequisites
Before we install anything lets be sure we have access to internet and that our apt database is updated
apt-get update
The authentification server require apache and php (we install the latest version)
apt-get install apache2 php5
Database server install
It also require a database server. PostgreSQL 8.1 is available. 8.1 is harder to configure but faster on current computer.
apt-get install postgresql-8.1
Configure PostgreSQL 8.1
If you selected postgresql-8.1, it will crash at install. You must configure postgresql.conf before being able to launch the services.
nano /etc/postgresql/8.1/main/postgresql.conf
This isn't a good security setting, you should make sure to configure the whole thing later on! Right now, you need, at least to change:
#listen_addresses='localhost'
SSL = true
for:
listen_addresse='*'
SSL = false
Install prerequisites - step2
We also need some specifics librairies
apt-get install xml-core gettext mcrypt libapache2-mod-php5 php5-cgi
apt-get install php5-mcrypt php5-mhash php5-pgsql php-pear php5-xmlrpc php5-curl
if you are using a current/2011 debian/ubuntu, you have to enable long variable names in suhosin - otherwise php will not work as expected:
vi /etc/php5/apache2/conf.d/suhosin.ini
-> add: suhosin.post.max_name_length = 100
-> add: suhosin.request.max_varname_length = 100
To get the latest version of wifidog-auth we will need subversion:
apt-get install subversion
If you want multi-locales support, you will have to install that packages (or configure every one of them).
apt-get install locales-all
Some more libs
pear install XML_RPC
cd /tmp
wget http://ovh.dl.sourceforge.net/sourceforge/phlickr/Phlickr-0.2.5.tgz
pear install Phlickr-0.2.5.tgz
rm Phlickr-0.2.5.tgz
Some stuff that isn't needed for the install, but still nice to have on a server (and which won't be install by default). If you don't what these are, you might not need them ;-) Openssh-server will allow you to launch command remotly, very useful for the third screen of install.php
apt-get install openssh-server less
Install the auth server
svn checkout https://dev.wifidog.org/svn/trunk/wifidog-auth
mv wifidog-auth/ /var/www/
Apache 2 configuration file
We need to change the document root. We take for granted that this server will be of no other "web" use... if it is, guess you'll have to learn how to configure apache2.
nano /etc/apache2/sites-available/default
and change (at the fifth line):
DocumentRoot /var/www/
to:
DocumentRoot /var/www/wifidog-auth/wifidog
remove the rewrite rule around line 17
restart apache2:
cd /etc/init.d/
./apache2 restart
Configure locale in wifidog.conf
If you have installed locales-all and you want to keep the "French" default portal page, this step isn't needed. In other cases: you will have to change the file config.php
nano /var/www/wifidog-auth/wifidog/config.php
on line 208 (ctrl+w+enter, ctrl+t+enter, 208) remplace
define('DEFAULT_LANG', 'fr_CA');
by:
define('DEFAULT_LANG', 'en_US');
Configure mail server
You need to have a valid mailer in order to mail account confirmation!
Installing postfix
apt-get install postfix
Select the "internet site with smart host" configuration option and answer the next series of questions.
Configure the auth server
Go to http://your-domaine.com/install.php and follow the instructions. You can follow the following walk-though, under the install step: auth-server. It isn't updated though. Or you can follow the onscreen introduction ;-)
They will ask to :
1) First screen
create a wifidog user in postgres
su - postgres
createuser wifidog --pwprompt
IF you have PostgreSQL 8.1 : answer no to the three questions
create a database owned by this new user
createdb wifidog --encoding=UTF-8 --owner=wifidog
you must then
cat /tmp/dog_cookie.txt
and click next in your browser (it will ask for the password in dog_cookie.txt)
2) Second screen: Verification of the installed software. If you followed this guide, you have everything install (except Radius support).
3) Third screen:
You will have to copy-paste the big serie of command, click refresh and next. The easiest way of doing that is if you have a ssh connection to your box (this is why I proposed openssh-server package earlier)
4) Fourth screen You may need to install Smarty. Let it do that. NEXT.
Click install for simplepie, (you may need to do this manually in your ssh session by changing /branches/ to /releases/ in the failed command from your web console session as the svn repo has changed structure at simplepie.org), then click NEXT.
Click install for feedpressreview, then next.
Click NEXT when asked to install Phlickr (it is already installed, even if the system doesn't see it).
5) Fill out your db information..
Remove installation files
Of course, the only one that should have access to the install.php file is you. You will need to move the file "install.php" out of public sight.
1) Go to your wifidog directory (/var/www/wifidog-auth/wifidog in our case).
cd /var/www/wifidog-auth/wifidog
2) Move "install.php" file to the parent directory which is not visible to the public:
mv install.php ../install.php
note that you can move it wherever you want, but make sure it's not public.
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