网络编程 UDP 改变网卡的硬件地址

在程序里动态改变网卡的硬件地址

1,取得网卡的硬件地址

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h> int main(){
int fd;
ifreq ifr; fd = socket(AF_INET, SOCK_DGRAM, 0);
strncpy(ifr.ifr_name, "enp0s3", IFNAMSIZ - 1);
if(ioctl(fd, SIOCGIFHWADDR, &ifr) != 0){
perror("ioctl");
return 1;
}
close(fd); printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
(unsigned char)ifr.ifr_hwaddr.sa_data[0],
(unsigned char)ifr.ifr_hwaddr.sa_data[1],
(unsigned char)ifr.ifr_hwaddr.sa_data[2],
(unsigned char)ifr.ifr_hwaddr.sa_data[3],
(unsigned char)ifr.ifr_hwaddr.sa_data[4],
(unsigned char)ifr.ifr_hwaddr.sa_data[5]);
}

github源代码

2,改变网卡的硬件地址

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <net/if_arp.h> int main(){
int fd;
ifreq ifr; fd = socket(AF_INET, SOCK_DGRAM, 0); ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER; ifr.ifr_hwaddr.sa_data[0] = 0xAA;
ifr.ifr_hwaddr.sa_data[1] = 0xBB;
ifr.ifr_hwaddr.sa_data[2] = 0xCC;
ifr.ifr_hwaddr.sa_data[3] = 0xDD;
ifr.ifr_hwaddr.sa_data[4] = 0xEE;
ifr.ifr_hwaddr.sa_data[5] = 0xFF; strncpy(ifr.ifr_name, "enp0s3", IFNAMSIZ - 1);
if(ioctl(fd, SIOCSIFHWADDR, &ifr) != 0){
perror("ioctl");
return 1;
}
}

github源代码

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05-07 12:00