修改pam_mysql的源代码,让他支持ipv6. - XiZi's Blog

修改pam_mysql的源代码,让他支持ipv6.

Xizi posted @ 2009年5月26日 07:08 in IPv6 with tags ubuntu IPv6 Pam_mysql , 3014 阅读

      配置了vsftp+pam_mysql+mysql的虚拟用户管理系统。但学校的ipv6网络,人家用ipv6访问的时候不能准确记录其ip地址。遂down了pam_mysql的源代码,改之。基于尽量少的改动原有文件的原则。添加了部分代码。现在ok了。下面给大家说说具体修改过程。

1.    当然是下载源代码了。

           在你能有写权限的目录,比如 /home/you/ 建立工作目录如:mysql-pam  并进入

mkdir pam-mysql
cd pam-mysql
apt-get source libpam-mysql

将会得到以下文件

ado@www:~/mysql-pam$ ls
pam-mysql-0.6.2            pam-mysql_0.6.2-1.dsc
pam-mysql_0.6.2-1.diff.gz  pam-mysql_0.6.2.orig.tar.gz
 

 2.    修改pam_mysql.c

ado@www:~/mysql-pam$ cd pam-mysql-0.6.2/
ado@www:~/mysql-pam/pam-mysql-0.6.2$ vim pam_mysql.c
 

 

第1753行,原文件为:

        if (NULL == (remote_host = xcalloc(16, sizeof(char)))) {
                syslog(LOG_AUTHPRIV | LOG_CRIT, PAM_MYSQL_LOG_PREFIX "allocation failure at " __FILE__ ":%d", __LINE__);
                return PAM_MYSQL_ERR_ALLOC;
        }
 

修改为:

        if (NULL == (remote_host = xcalloc(255, sizeof(char)))) {
                syslog(LOG_AUTHPRIV | LOG_CRIT, PAM_MYSQL_LOG_PREFIX "allocation failure at " __FILE__ ":%d", __LINE__);
                return PAM_MYSQL_ERR_ALLOC;
        }
 

 

给remote_host变量足够的存储空间。

 

从1752行开始田间如下能容:

                sprintf(remote_host,"%s","unknown");
                struct sockaddr_in6 client_address;
                int salen6=sizeof(client_address);
                 if (!getpeername(0, (struct sockaddr *) &client_address, &salen6))
                {
                        char inet[64]="no ip is 2001:0da8:a800:0000:0000:0000:0000:0000 has nothing to do";
                        inet_ntop(AF_INET6,&(client_address.sin6_addr),inet,strlen(inet));
                        sprintf(remote_host,"%s",inet);
                }
                //strcpy(remote_host, "(unknown)");注释掉原来的操作
               //下面的代码不变

3. 好了,重新编译吧

./configure  !如果提示找不到什么“mysql_config”就安装这个包"libmysqlclient15-dev"

make

sudo make install

# 默认会安装到 /usr/lib/security/里面。
# 建个软连接

ln -s /usr/lib/security/pam_mysql.so /lib/security/pam_mysql.so

 

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In order to support ipv6 with pam_mysql, you will need to modify the source code to include the appropriate IPv6 libraries and functions. Additionally, you will need to add support for IPv6 addresses in the pam_mysql configuration file. With these changes in place, pam_mysql when international travel resume will be able to authenticate users with IPv6 addresses.


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