我的代码

https://github.com/liuqun/demo-linux-tun-virtual-netcard/blob/master/demo-1-ioctl/src/main.c

代码片段1

以下代码节选自"openV屁N"的源码tun.c文件:

openV屁N封装了一组读写函数如下:

open_tun(dev_name, dev_type, dev_node, tuntap上下文)打开Tun虚拟网卡

close_tun(tuntap上下文)

n_bytes = write_tun(tuntap上下文, buf, len)

n_bytes = read_tun(tuntap上下文, buf, len)

int write_tun(struct tuntap *tt, uint8_t *buf, int len)

{

return write(tt->fd, buf, len);

}

int read_tun(struct tuntap *tt, uint8_t *buf, int len)

{

return read(tt->fd, buf, len);

}

void open_tun(const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt)

{

struct ifreq ifr;

/*

* We handle --dev null specially, we do not open /dev/null for this.

*/

if (tt->type == D