wireless_ioc.c

/**
 * program to demonstrate wireless ioctl
 */

#include <stdint.h>
#include <stdio.h>
#include <math.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <linux/wireless.h>

int main()
{
    int sock;

    sock = socket(AF_INET, SOCK_DGRAM, 0);
    if (sock < 0) {
        return -1;
    }

    struct iwreq req;

    memset(&req, 0, sizeof(req));
    strcpy(req.ifr_ifrn.ifrn_name, "wlxd0374533247a");
    int ret;

    ret = ioctl(sock, SIOCGIWNAME, &req);
    if (ret < 0) {
        return -1;
    }

    printf("name: %s\n", req.u.name);

    memset(&req, 0, sizeof(req));
    strcpy(req.ifr_ifrn.ifrn_name, "wlxd0374533247a");
    char id[255];

    req.u.essid.pointer = id;
    req.u.essid.length = 255;
    ret = ioctl(sock, SIOCGIWESSID, &req);
    if (ret < 0) {
        perror("ioctl");
        return -1;
    }

    printf("essid: %s\n", req.u.essid.pointer);

    memset(&req, 0, sizeof(req));
    strcpy(req.ifr_ifrn.ifrn_name, "wlxd0374533247a");
    ret = ioctl(sock, SIOCGIWFREQ, &req);
    if (ret < 0) {
        perror("ioctl");
        return -1;
    }

    printf("freq %f\n", ((double)req.u.freq.m ) / 1000000000);

    memset(&req, 0, sizeof(req));
    strcpy(req.ifr_name, "wlxd0374533247a");
    ret = ioctl(sock, SIOCGIWRATE, &req);
    if (ret < 0) {
        perror("ioctl");
        return -1;
    }

    printf("rate %f\n", req.u.bitrate.value / 1000000.0);

    memset(&req, 0, sizeof(req));
    strncpy(req.ifr_name, "wlxd0374533247a", IFNAMSIZ);
    ret = ioctl(sock, SIOCGIWAP, &req);
    if (ret < 0) {
        perror("ioctl");
        return -1;
    }

    uint8_t *apmac = req.u.ap_addr.sa_data;

    printf("apmac %02x:%02x:%02x:%02x:%02x:%02x\n",
                    apmac[0], apmac[1], apmac[2], apmac[3], apmac[4], apmac[5]);
    memset(&req, 0, sizeof(req));
    strncpy(req.ifr_name, "wlxd0374533247a", IFNAMSIZ);
    char nickname[256];
    req.u.essid.pointer = nickname;
    req.u.essid.length = sizeof(nickname);
    ret = ioctl(sock, SIOCGIWNICKN, &req);
    if (ret < 0) {
        perror("ioctl");
        return -1;
    }

    printf("nickname %s\n", nickname);

    close(sock);
}