windows和linux中UDP编程

//servser.cpp

;char* GetTime();int main(){WSADATA wsaData;WORD Ret;if ((Ret = WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)){cout << “WSAStartup() Error Whit:” << Ret << endl;WSACleanup();return -1;}//统一版本类型。SOCKET sockSer, sockCli;sockSer = socket(AF_INET,SOCK_DGRAM,0);SOCKADDR_IN addrSer, addrCli;memset(&addrSer,0,sizeof(addrSer));memset(&addrCli,0,sizeof(addrCli));addrSer.sin_family = AF_INET;addrSer.sin_port = htons(PORT);addrSer.sin_addr.S_un.S_addr = inet_addr(IP);int len = sizeof(SOCKADDR);bind(sockSer,(SOCKADDR*)&addrSer,len);char serbuff[255];//不需要监听连接。while (1){recvfrom(sockSer,serbuff,sizeof(serbuff),0,(SOCKADDR*)&addrCli,&len);cout << serbuff << endl;sendto(sockSer, GetTime(), 30, 0, (SOCKADDR*)&addrCli, len);}WSACleanup();closesocket(sockSer);closesocket(sockCli);return 0;}char* GetTime(){char buff[255];SYSTEMTIME sys;GetLocalTime(&sys);//初始化本地时间。sprintf(buff,”%d:%d:%d:%d:%d:%d”,sys.wYear,sys.wMonth,sys.wDay,sys.wHour,sys.wMinute,sys.wSecond);return buff;};#pragma comment(lib,”ws2_32.lib”)int main(){DWORD Ret;WSAData wsaData;if ((Ret = WSAStartup(MAKEWORD(2, 2), &wsaData)) != 0){cout <<“WSAStartup() Error Wiht : “<< Ret << endl;WSACleanup();return -1;}SOCKET sockCli = socket(AF_INET,SOCK_DGRAM,0);SOCKADDR_IN addrSer;addrSer.sin_family = AF_INET;addrSer.sin_port = htons(PORT);addrSer.sin_addr.S_un.S_addr = inet_addr(IP);int len = sizeof(addrSer);const char timebuff[] = “times”;char serbuff[255];connect(sockCli,(SOCKADDR*)&addrSer,len);while (1){sendto(sockCli,timebuff,strlen(timebuff)+1,0,(SOCKADDR*)&addrSer,len);recvfrom(sockCli,serbuff,sizeof(serbuff),0,(SOCKADDR*)&addrSer,&len);cout <<timebuff<<serbuff << endl;Sleep(2000);}return 0;}

//linux: //ser.cpp

;int main(){int sockSer = socket(AF_INET,SOCK_DGRAM,0);sockaddr_in addrSer,addrCli;addrSer.sin_family = AF_INET;addrSer.sin_port = htons(PORT);addrSer.sin_addr.s_addr = inet_addr(IP);socklen_t len=sizeof(sockaddr);bind(sockSer,(sockaddr*)&addrSer,len);char serbuff[255]=”!Hello !I am server!”;char clibuff[255];while(1){recvfrom(sockSer,clibuff,sizeof(clibuff),0,(sockaddr*)&addrSer,&len);cout<<“CLient Say:”<<clibuff<<endl;sendto(sockSer,serbuff,strlen(serbuff)+1,0,(sockaddr*)&addrSer,len);}return 0;}

//cli.cpp

;int main(){int sockCli = socket(AF_INET,SOCK_DGRAM,0);sockaddr_in addrSer;addrSer.sin_family = AF_INET;addrSer.sin_port = htons(PORT);addrSer.sin_addr.s_addr = inet_addr(IP);socklen_t len = sizeof(sockaddr);char clibuff[]=”hello! I am client!”;char serbuff[255];while(1){sendto(sockCli,clibuff,strlen(clibuff)+1,0,(sockaddr*)&addrSer,len);recvfrom(sockCli,serbuff,sizeof(serbuff),0,(sockaddr*)&addrSer,&len);cout<<“Server Say:>”<<serbuff<<endl;sleep(2);}return 0;}

，玩坏了可以选择重来，