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  • 根据网卡获取MAC地址

    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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  • 原文地址:https://www.cnblogs.com/rollenholt/p/2586151.html
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