UDP通信服务器和客户端 VC++.doc

UDP通信服务器和客户端 VC+服务器端：/ udpserver.cpp : 定义控制台应用程序的入口点。/#include stdafx.h#include winsock2.h#define BUF_ZIZE 64#include using namespace std;#pragma comment(lib,ws2_32.lib)int _tmain(int argc, _TCHAR* argv) WSADATA wsd; SOCKET sServer; SOCKET sClient; SOCKADDR_IN addrServ; SOCKADDR_IN addrClient; char bufBUF_ZIZE; int retVal; /初始化套接字动态库 if(WSAStartup(MAKEWORD(2,2),&wsd) != 0) coutWSAStartup errorendl; return 1; /创建套接字 sServer = socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP); if(INVALID_SOCKET = sServer) coutsocket errorendl; WSACleanup(); return -1; /创建客户端套接字 sClient = socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP); if(INVALID_SOCKET = sClient) coutClient socket failedendl; WSACleanup(); return -1; /服务器套接字 addrServ.sin_addr.s_addr = INADDR_ANY; addrServ.sin_port = htons(4999); addrServ.sin_family = AF_INET; /绑定套接字 retVal = bind(sServer,(LPSOCKADDR)&addrServ,sizeof(SOCKADDR_IN); if(retVal = SOCKET_ERROR) coutbind erroeendl; WSACleanup(); return -1; int len = sizeof(SOCKADDR); /开始等待客户端发来消息 recvfrom(sServer,buf,BUF_ZIZE,0,(SOCKADDR*)&addrClient,&len); coutbufendl; addrClient.sin_family = AF_INET; addrClient.sin_addr.s_addr = inet_addr(127.0.0.1); addrClient.sin_port = htons(short)4999); /发送给客户端 ZeroMemory(buf,BUF_ZIZE); strcpy(buf,知道了); sendto(sClient,buf,BUF_ZIZE,0,(SOCKADDR*)&addrClient,sizeof(SOCKADDR); system(pause); closesocket(sServer); WSACleanup(); return 0;客户端：/ udpclient.cpp : 定义控制台应用程序的入口点。/#include stdafx.h#define BUF_SIZE 64#include winsock2.h#pragma comment(lib,ws2_32.lib)#includeusing namespace std;int _tmain(int argc, _TCHAR* argv) WSADATA wsd; SOCKET sHost; SOCKET sClient; SOCKADDR_IN servAddr; char bufBUF_SIZE; char cufBUF_SIZE; int retVal; /初始化套接字动态库 if(WSAStartup(MAKEWORD(2,2), &wsd) != 0) coutWSAStartup failedendl; return -1; /创建套接字 sHost = socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP); if(INVALID_SOCKET = sHost) coutsocket failedendl; WSACleanup(); return -1; /创建客户端套接字 sClient = socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP); if(INVALID_SOCKET = sClient) coutClient socket failedendl; WSACleanup(); return -1; /设置服务器地址 servAddr.sin_family = AF_INET; servAddr.sin_addr.s_addr = inet_addr(127.0.0.1); servAddr.sin_port = htons(short)4999); int nServAddlen = sizeof(servAddr); /发消息送到服务器 ZeroMemory(buf,BUF_SIZE); strcpy(buf,快了); sendto(sHost,buf,BUF_SIZE,0,(SOCKADDR*)&servAddr,sizeof(SOCKADDR); int len = sizeof(SOCKADDR); /开始等待服务端发来消息 ZeroMemory(cuf,BUF_SIZE); recvfrom(sCl