vc socket

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link上 wsock32.lib

1.TCP服务器端:#include <Winsock2.h>#include <stdio.h>void main(){ WORD wVersionRequested; WSADATA wsaData; int err;  wVersionRequested = MAKEWORD( 1, 1 );  err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) {  return; }  if ( LOBYTE( wsaData.wVersion ) != 1 ||        HIBYTE( wsaData.wVersion ) != 1 ) {  WSACleanup( );  return;  } SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY); addrSrv.sin_family=AF_INET; addrSrv.sin_port=htons(6000); bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); listen(sockSrv,5); SOCKADDR_IN addrClient; int len=sizeof(SOCKADDR); while(1) {  SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);  char sendBuf[100];  sprintf(sendBuf,"Welcome %s to http://www.sunxin.org",   inet_ntoa(addrClient.sin_addr));  send(sockConn,sendBuf,strlen(sendBuf)+1,0);  char recvBuf[100];  recv(sockConn,recvBuf,100,0);  printf("%s/n",recvBuf);  closesocket(sockConn); }}2.TCP客户端：#include <Winsock2.h>#include <stdio.h>void main(){ WORD wVersionRequested; WSADATA wsaData; int err;  wVersionRequested = MAKEWORD( 1, 1 );  err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) {  return; }  if ( LOBYTE( wsaData.wVersion ) != 1 ||        HIBYTE( wsaData.wVersion ) != 1 ) {  WSACleanup( );  return;  } SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1"); addrSrv.sin_family=AF_INET; addrSrv.sin_port=htons(6000); connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); char recvBuf[100]; recv(sockClient,recvBuf,100,0); printf("%s/n",recvBuf); send(sockClient,"This is lisi",strlen("This is lisi")+1,0); closesocket(sockClient); WSACleanup();}3.UDP服务器端#include <Winsock2.h>#include <stdio.h>void main(){ WORD wVersionRequested; WSADATA wsaData; int err;  wVersionRequested = MAKEWORD( 1, 1 );  err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) {  return; }  if ( LOBYTE( wsaData.wVersion ) != 1 ||        HIBYTE( wsaData.wVersion ) != 1 ) {  WSACleanup( );  return;  } SOCKET sockSrv=socket(AF_INET,SOCK_DGRAM,0); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY); addrSrv.sin_family=AF_INET; addrSrv.sin_port=htons(6000); bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); SOCKADDR_IN addrClient; int len=sizeof(SOCKADDR); char recvBuf[100]; recvfrom(sockSrv,recvBuf,100,0,(SOCKADDR*)&addrClient,&len); printf("%s/n",recvBuf); closesocket(sockSrv); WSACleanup();}4.UDP客户端#include <Winsock2.h>#include <stdio.h>void main(){ WORD wVersionRequested; WSADATA wsaData; int err;  wVersionRequested = MAKEWORD( 1, 1 );  err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) {  return; }  if ( LOBYTE( wsaData.wVersion ) != 1 ||        HIBYTE( wsaData.wVersion ) != 1 ) {  WSACleanup( );  return;  } SOCKET sockClient=socket(AF_INET,SOCK_DGRAM,0); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1"); addrSrv.sin_family=AF_INET; addrSrv.sin_port=htons(6000); sendto(sockClient,"Hello",strlen("Hello")+1,0,  (SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); closesocket(sockClient); WSACleanup();}

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