是否有任何可用的 C 库包含 ifconfig 的 API? [英] is there any C library available that contains APIs for ifconfig?

问题描述

我想设置 MTU 或获取一些设备详细信息，但我不想使用系统(ifconfig ...").

I want to set the MTU in or to get some device details, but I don't want to use system("ifconfig ...").

有没有办法在 C 中做到这一点?有些像 libifconfig.so?

Is there any way to do it in C? Some like libifconfig.so?

MTU的源代码可以找到这里.

The source code of MTU can be found here.

但我现在真的没有太多时间.如何获取所有可用接口的名称(我的系统中有很多)

But I really don't too much time right now. How can I get the name of ALL the available interfaces (I have plenty in my system)

推荐答案

可以通过ioctl来完成.请参阅 netdevice(7).我猜 SIOCGIFMTU 和 SIOCSIFMTU 是你要找的.我不知道它是否是标准的，如果您需要支持其他 Unix，请更新您的问题.

It can be done with ioctl. See netdevice(7). I'm guessing SIOCGIFMTU and SIOCSIFMTU are what you're looking for. I don't know if it's standard, update your question if you need to support other Unixes.

编辑

在您的机器上获取接口(未经测试):

To get the interfaces on your machine (untested):

int sock;
struct ifconf *conf;

sock = socket(AF_INET, SOCK_STREAM, 0);
ioctl(sock, SIOCGIFCONF , (char*) conf);

不要马虎，不要忘记检查返回值.我不在这里检查它们，因为我不在乎；你可能会.

Don't be sloppy and don't forget to check the return values. I don't check them here because I don't care; you probably do.

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