考试网 >> IT认证 >> 微软 >> MCSE指导 >> 微软ping命令的源代码

发布时间：2006-06-28 06:09     点击：

sizeof(timeout));

if(bread == SOCKET_ERROR) {

fprintf(stderr,"failed to set send timeout: %d\n",WSAGetLastError());

ExitProcess(STATUS_FAILED);

}

memset(&dest,0,sizeof(dest));

hp = gethostbyname(argv[1]);

if (!hp){

addr = inet_addr(argv[1]);

}

if ((!hp) && (addr == INADDR_NONE) ) {

fprintf(stderr,"Unable to resolve %s\n",argv[1]);

ExitProcess(STATUS_FAILED);

}

if (hp != NULL)

memcpy(&(dest.sin_addr),hp->h_addr,hp->h_length);

else

dest.sin_addr.s_addr = addr;

if (hp)

dest.sin_family = hp->h_addrtype;

else

dest.sin_family = AF_INET;

dest_ip = inet_ntoa(dest.sin_addr);

if (argc >2) {

datasize = atoi(argv[2]);

if (datasize == 0)

datasize = DEF_PACKET_SIZE;

}

else

datasize = DEF_PACKET_SIZE;

datasize += sizeof(IcmpHeader);

icmp_data = xmalloc(MAX_PACKET);

recvbuf = xmalloc(MAX_PACKET);

if (!icmp_data) {

fprintf(stderr,"HeapAlloc failed %d\n",GetLastError());

ExitProcess(STATUS_FAILED);

}

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