pppd拨号创建新的plugin定制自己的拨号软件

最新推荐文章于 2019-12-19 15:40:58 发布

原创

最新推荐文章于 2019-12-19 15:40:58 发布 · 4k 阅读

2 ·

CC 4.0 BY-SA版权

文章标签：

#hook #HOOK #Hook #linux #Linux #LINUX #pppd

本文介绍了如何通过创建pppd插件来定制拨号行为，以适应特定需求，如处理加密密码。插件可以添加额外选项，设置hook函数以改变pppd的行为，例如在PAP认证过程中实现不同的密码处理逻辑。通过插件，用户可以更方便地使用加密过的电信密码进行拨号上网。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

The idea of plugins is to provide a way for people to customize the behaviour of pppd without having to either apply local patches to each version or get their patches accepted into the standard distribution.

A plugin is a standard shared library object, typically with a name ending in .so. They are loaded using the standard dlopen() library
call, so plugins are only supported on systems which support shared libraries and the dlopen call. At present pppd is compiled with
plugin support only under Linux and Solaris.

Using gcc under Linux, a plugin called `xyz' could be compiled and linked with the following commands:

gcc -c -O xyz.c

gcc -shared -o xyz.so xyz.o

Plugins can access global variables within pppd, so it is useful for them to #include "pppd.h" from the pppd source directory.

Plugins can affect the behaviour of pppd in at least three ways:
1. They can add extra options which pppd will then recognize. This is done by calling the add_options() procedure with a pointer to an array of option_t structures. The last entry in the array must have its name field