根据网卡获取MAC地址-白红宇

The mac address or the hardware address or the ethernet address of an interface is a 48 bit number that looks like this : 00:1c:c0:f8:79:ee

The mac address of an interface can be found given its name. The function to use is ioctl.

                               
#include <stdio.h>    //printf
#include <string.h>   //strncpy
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>   //ifreq
#include <unistd.h>   //close
int
main()
{ 
    
int
fd;
    
struct
ifreq ifr;
    
char
*iface = 
"eth0"
;
    
unsigned 
char
*mac;
    
    
fd = socket(AF_INET, SOCK_DGRAM, 0);
    
ifr.ifr_addr.sa_family = AF_INET;
    
strncpy
(ifr.ifr_name , iface , IFNAMSIZ-1);
    
ioctl(fd, SIOCGIFHWADDR, &ifr);
    
close(fd);
    
    
mac = (unsigned 
char
*)ifr.ifr_hwaddr.sa_data;
    
    
//display mac address
    
printf
(
"Mac : %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n"
, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
    
return
0;
}
          
        

Output

                      1            $ gcc interface_mac.c && ./a.out           
         
                      2            Mac : 00:1c:c0:f8:79:ee

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本文转自被遗忘的博客园博客，原文链接：http://www.cnblogs.com/rollenholt/archive/2012/07/11/2586151.html，如需转载请自行联系原作者