[C/C++] 網路IP和MAC位置

說明:
網路IP和MAC位置

Code:

#include <stdio.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/netdevice.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <unistd.h>
#include <string.h>

#define BOOL                    int
#define TRUE                    0
#define FALSE                   -1
#define MAX_LONG_LENGTH         1024
#define MAX_SHORT_LENGTH        128

BOOL get_mac_address_fun(char *name, char *mac)
{
    BOOL ret = FALSE;
    struct ifreq s;
    BOOL fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);

    strcpy(s.ifr_name, name);
    if (0 == ioctl(fd, SIOCGIFHWADDR, &s)) 
    {
        sprintf(mac, "%02x-%02x-%02x-%02x-%02x-%02x",
        (unsigned char) s.ifr_addr.sa_data[0],
        (unsigned char) s.ifr_addr.sa_data[1],
        (unsigned char) s.ifr_addr.sa_data[2],
        (unsigned char) s.ifr_addr.sa_data[3],
        (unsigned char) s.ifr_addr.sa_data[4],
        (unsigned char) s.ifr_addr.sa_data[5]);
        ret = TRUE;
    }

    return ret;
}

BOOL get_ip_address_fun(char *name, char *ip)
{
    int fd;
    BOOL ret = FALSE;
    struct ifreq ifr;
    
    fd = socket(AF_INET, SOCK_DGRAM, 0);
    if (fd)
    {
        ifr.ifr_addr.sa_family = AF_INET;
        strncpy(ifr.ifr_name, name, IFNAMSIZ-1);
        ioctl(fd, SIOCGIFADDR, &ifr);
        strcpy(ip, inet_ntoa(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr));
        close(fd);
        ret = TRUE;
    }
    
    return ret;
}

int main(int argc, char *argv[])
{
    char ip[MAX_SHORT_LENGTH];
    char mac[MAX_SHORT_LENGTH];
    
    get_ip_address_fun("eth0", ip);        
    get_mac_address_fun("eth0", mac);
    
    printf("ip : %s, mac : %s\n", ip, mac);

    return 0;
}

Result:

ip : 192.168.1.100, mac : 00-00-00-55-55-55