利用ioctl(获取无线速率

其实对于自己装了网卡驱动的来说，应该从最根本的驱动中获取速率。

但是用ioctl()也可以，其实实现和iwconfig命令相同。

仅仅获取速率这部分：

#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <string.h>
#include “wireless_copy.h”
#define dvname “ath0”
int get_rate(int sock, struct iwreq* wrq,__s32 rate);
int main()
{
    struct iwreq wrq;
    int sock;
    char gInterfaceName[16];
    __s32 rate;
    memset(gInterfaceName, 0, sizeof(gInterfaceName));
    strcat(gInterfaceName,dvname);
    sock = socket(AF_INET, SOCK_DGRAM, 0);
        if (sock < 0)
        {
            printf(“Error Creating Socket for ioctl/n”);
            return 0;
        }
    memset(&wrq, 0, sizeof(wrq));
    strncpy(wrq.ifr_name, gInterfaceName, IFNAMSIZ);
    get_rate(sock, &wrq,rate);
    printf(“/nrate:%dM/n/n”,wrq.u.bitrate.value/1000000);
    return 0;
}
int get_rate(int sock, struct iwreq* wrq,__s32 rate)
{
    if(ioctl(sock, SIOCGIWRATE, wrq) < 0)
    {
        perror(“Ioctl error”);
        return(0);
    }
    return 1;
}