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代码如下:

/*************************************************************************

 > File Name: wake_up.c

 > Author: wz

 > Created Time: Fri 15 Nov 2013 03:42:47 PM CST

************************************************************************/

#include

#include

#include

#include

#include

#include

#include<sys/ioctl.h>

void get_mac(char *argv,unsigned char *save_mac)

{

 int j = 0;

int num_x = 0,num_d,first = 1;

 while(*argv != 0)

 {

  if(*argv != 🙂

  {

   if(isdigit(*argv) && first)

   {

num_x = (*argv – 0)*16;

    first = 0;

    argv++;

    continue;

   }

   if(first && isalpha(*argv))

   {

    num_x = (10+(*argv – a))*16;

    first = 0;

argv++;

    continue;

   }

   if(!first && isdigit(*argv))

   {

    num_x = num_x+(*argv – 0);

    first = 1;

    argv++;

    continue;

   }

if(!first && isalpha(*argv))

   {

    num_x = num_x + (10 + (*argv – a));

    first = 1;

    argv++;

    continue;

   }

  }

  else

  {

save_mac[j] = num_x;

   num_x = 0;

   argv++;

   j++;

  }

 }

 save_mac[j] = num_x;

}

int main(int argc,char *argv[])

{

int sockfd,i,j,on = 1,n;

 unsigned char packet[120];

 unsigned char save_mac[120];

 struct sockaddr_in to;

if(argc < 2)

 {

  fprintf(stderr,”用法：程序名 + 目标主机物理地址”);

  return 1;

 }

 get_mac(argv[1],save_mac);

 //构建magic数据包

for(i = 0; i < 6; i++)

 {

  packet[i] = 0xff;

 }

 for(i = 1; i < 17; i++)

 {

  memcpy(packet+i*6,save_mac,6);

 }

sockfd = socket(AF_INET,SOCK_DGRAM,0);

 setsockopt(sockfd,SOL_SOCKET,SO_BROADCAST,&on,sizeof(on));

 if(socket < 0)

 {

fprintf(stderr,”套接字创建错误n”);

  return 1;

 }

 memset((void *)&to,0,sizeof(to));

 to.sin_family = AF_INET;

to.sin_port = htons(30000);

 to.sin_addr.s_addr = inet_addr(“125.217.40.255”);

n = sendto(sockfd,packet,sizeof(packet),0,(struct sockaddr *)&to,sizeof(to));

 if(n <= 0)

 {

  fprintf(stderr,”发送失败！n”);

  return 1;

 }

 else

 {

printf(“发送成功.n”);

 }

 close(sockfd);

 return 0;

 

}