ios 实现局域网远程开机的代码

#include <stdio.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>

NSString*macStr=@"36:b2:47:f4:f4:d3";

   /*--去除字符串中的 :---*/
   NSArray *macArr = [macStr componentsSeparatedByString:@":"];
    NSMutableArray*arr=[macArr mutableCopy];
   //修改一下格式
    for (int i=0; i<arr.count; i++) {
        NSString*string22=[NSString stringWithFormat:@"0x%@",arr[i]];
        arr[i]=string22;
    }
  //目的主机mac地址
   unsigned char mac[6];
  //转成char字符型
  for(int i=0;i<arr.count;++i){
        const char *ptr2 = [arr[i] cStringUsingEncoding:NSASCIIStringEncoding];
        int ptr3;
        sscanf(ptr2, "%x",&ptr3);
        mac[i]=ptr3;
    }

NSString*string=@"255.255.255.255"；
const char *ptr = [string cStringUsingEncoding:NSASCIIStringEncoding];

unsigned char packet[102];
    struct sockaddr_in addr;
    int sockfd, i,j, on = 1;
    
    
    for(i=0;i<6;i++){
        packet[i] = 0xFF;
    }
    
    for(i=1;i<17;i++){
        for(j=0;j<6;j++){
            packet[i*6+j] = mac[j];
        }
    }

   //UDP
    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    //广播
    setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST,&on, sizeof(on));
    if(sockfd < 0){
        exit(0);
    }
    memset((void*)&addr, 0, sizeof(addr));
    addr.sin_family = AF_INET;
    addr.sin_port = htons(10000);
    addr.sin_addr.s_addr = inet_addr(ptr);//广播地址
    
     sendto(sockfd, packet, sizeof(packet), 0, (struct sockaddr *)&addr,     sizeof(addr));
     close(sockfd);