Tcp編程代碼//#include<Windows.h>#include<stdio.h>#include<WinSock2.h>#pragmacomment(lib,"Ws2_32.lib")#define BUF_SIZE64voidmain(){WSADATAwsd;SOCKETsClient;SOCKET sServer;charbuf[BUF_SIZE];intretVal;if(WSAStartup(MAKEWORD(2,2),&wsd)){printf("WSAStartupfailed!\n");return;}sServer=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);if(INVALID_SOCKET==sServer){printf("socketfailed!\n");WSACleanup();return;}SOCKADDR_IN addrServ;addrServ.sin_family=AF_INET;addrServ.sin_port=htons(4999);addrServ.sin_addr.S_un.S_addr=INADDR_ANY;if(retVal==SOCKET_ERROR){printf("bindfailed!\n");closesocket(sServer);WSACleanup();return;}retVal=listen(sServer,1);if(SOCKET_ERROR==retVal){printf("listenfailed\n");closesocket(sServer);WSACleanup();return;}SOCKADDR_IN adddClient;intaddrClentLen=sizeof(adddClient);sClient=accept(sServer,(sockaddrFAR*)&adddClient,&addrClentLen);if(SOCKET_ERROR==sClient){printf("acceptfailed!\n");closesocket(sServer);WSACleanup();return;}ZeroMemory(buf,56);retVal=recv(sClient,buf,56,0);if(SOCKET_ERROR==retVal){printf("recvfailed\n");closesocket(sClient);closesocket(sServer);WSACleanup();return;}printf("%s",buf);closesocket(sServer);closesocket(sClient);WSACleanup();system("pause");}Ping實現(xiàn)代碼#include<stdio.h>#include<WS2tcpip.h>#include<WinSock2.h>#include"ping.h"#pragma voidmain(){charszDestip[]="10.15.72.27";SOCKETsRaw=::socket(AF_INET,SOCK_RAW,IPPROTO_ICMP);SetTimeOut(sRaw,1000,TRUE);SOCKADDR_INdest;dest.sin_family=AF_INET;dest.sin_port=htons(0);dest.sin_addr.S_un.S_addr=inet_addr(szDestip);charbuff[sizeof(ICMP_HDR)+32];ICMP_HDR*pIcmp=(ICMP_HDR*)buff;pIcmp->icmp_type=8;pIcmp->icmp_code=0;pIcmp->icmp_checksum=0;pIcmp->icmp_sequence=0;memset(&buff[sizeof(ICMP_HDR)],'E',32);USHORTnSeq=0;charrecvBuf[1024]={0};SOCKADDR_INfrom;intnLen=sizeof(from);while(TRUE){staticintnCount=0;intnRet;if(nCount++==4){break;}pIcmp->icmp_checksum=0;pIcmp->icmp_timestamp=::GetTickCount();pIcmp->icmp_sequence=nSeq++;pIcmp->icmp_checksum=checksum((USHORT*)buff,sizeof(ICMP_HDR)+32);if(nRet==SOCKET_ERROR){printf("sendto()failed:%d\n",::WSAGetLastError());return;}if(nRet==SOCKET_ERROR){if(::WSAGetLastError()==WSAETIMEDOUT){printf("timeout\n");continue;}printf("recvform()failed:%d\n",::WSAGetLastError());return;}intnTick=::GetTickCount();if(nRet<sizeof(IPHeader)+sizeof(ICMP_HDR)){printf("Toofewbytesfrom%s\n",::inet_ntoa(from.sin_addr));}ICMP_HDR*pRecvIcmp=(ICMP_HDR*)(recvBuf+sizeof(IPHeader));if(pRecvIcmp->icmp_type!=0){printf("nonechotype%drecvd\n",pRecvIcmp->icmp_type);return;}if(pRecvIcmp->icmp_id!=::GetCurrentProcessId()){printf("someoneelse'spacket!");return;}printf("%dbytesfrom%s:",nRet,inet_ntoa(from.sin_addr));pri