TCP Socket编程 C/C 实现 （Windows Platform SDK）

Server端:

#pragma comment(lib, "ws2_32.lib")#include #include void main(){ //版本协商 WORD wVersionRequested; WSADATA wsaData; int err;  wVersionRequested = MAKEWORD(1,1); //0x0101 err = WSAStartup(wVersionRequested,&wsaData); if(err!=0) {  return; }  if(LOBYTE(wsaData.wVersion)!=1 || HIBYTE(wsaData.wVersion)!=1)   //wsaData.wVersion!=0x0101 {  WSACleanup();  return; } //创建Socket SOCKET sockSvr = socket(AF_INET,SOCK_STREAM,0); //创建IP地址和端口 SOCKADDR_IN addrSvr; addrSvr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); addrSvr.sin_family = AF_INET; addrSvr.sin_port = htons(6000); //绑定端口监听 bind(sockSvr,(SOCKADDR*)&addrSvr,sizeof(SOCKADDR)); listen(sockSvr,5);  sockaddr_in addrClient; int len = sizeof(sockaddr); while(true) {  //阻塞方法，获得一个客户Socket连接  SOCKET sockConn = accept(sockSvr,(sockaddr*)&addrClient,&len);  char sendbuffer[128];  sprintf(sendbuffer,"Welcom %s!",inet_ntoa(addrClient.sin_addr));  //向客户Socket发送数据  send(sockConn,sendbuffer,strlen(sendbuffer)+1,0);  char recvbuffer[128];  //从客户Soc接受数据  recv(sockConn,recvbuffer,128,0);  printf("%s/n",recvbuffer);  //关闭Socket  closesocket(sockConn); } closesocket(sockSvr); //释放Winsock资源 WSACleanup();}

Client端:

#pragma comment (lib,"ws2_32.lib")#include #include void main(){ //版本协商 WORD wVersionRequested; WSADATA wsaData; int err;  wVersionRequested = MAKEWORD(1,1); //0x0101 err = WSAStartup(wVersionRequested,&wsaData); if(err!=0) {  return; }  if(LOBYTE(wsaData.wVersion)!=1 || HIBYTE(wsaData.wVersion)!=1)   //wsaData.wVersion!=0x0101 {  WSACleanup();  return; } //创建连向服务器的套接字 SOCKET sock = socket(AF_INET,SOCK_STREAM,0); //创建地址信息 SOCKADDR_IN hostAddr; hostAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); hostAddr.sin_family = AF_INET; hostAddr.sin_port = htons(6000); //连接服务器 connect(sock,(sockaddr*)&hostAddr,sizeof(sockaddr));  char revBuf[128]; //从服务器获得数据 recv(sock,revBuf,128,0); printf("%s/n",revBuf); //向服务器发送数据 send(sock,"Hello Host!",12,0); closesocket(sock);}