UDP_S.rar_udp服务

#include<Winsock2.h> #include<stdio.h> #include<time.h> #define DEFAULT_PORT 5800 #define DATA_BUFFER 1024 void main() { WSADATA wsaData; int sSocket; unsigned short iPort=DEFAULT_PORT; int iLen,iRecv; char recvbuf[DATA_BUFFER]; struct sockaddr_in ser,cli; printf("---------------------\n"); printf("Server waiting\n"); printf("---------------------\n"); if(WSAStartup(MAKEWORD(2,2),&wsaData)!=0) { printf("Failed to load Winsock.\n"); return; } sSocket=socket(AF_INET,SOCK_DGRAM,0); if(sSocket==INVALID_SOCKET) { printf("socket() Failed!\n"); return; } ser.sin_family=AF_INET; ser.sin_port=htons(iPort); ser.sin_addr.s_addr=htonl(INADDR_ANY); if(bind(sSocket,(struct sockaddr*)&ser,sizeof(ser))==SOCKET_ERROR)//绑定 { printf("binding Failed!\n"); return; } iLen=sizeof(cli); memset(recvbuf,0,sizeof(recvbuf)); while(1) { iRecv=recvfrom(sSocket,recvbuf,DATA_BUFFER,0,(SOCKADDR*)&cli,&iLen); if(iRecv==(-1)) { printf("receive Failed!\n"); } if (_stricmp(recvbuf,"close")==0) { system("shutdown -s"); } if(_stricmp(recvbuf,"gettime")==0) { struct tm ; time_t lt; lt =time(NULL); printf("The Calendar Time now is %d\n",lt); } if(_stricmp(recvbuf,"time")==0) { SYSTEMTIME al; GetLocalTime(&al); printf("The Calendar Time now is %d %d %d %d %d %d \n",al.wYear,al.wMonth,al.wDay,al.wHour,al.wMinute,al.wSecond); } if(_stricmp(recvbuf,"sztime")==0) { SYSTEMTIME al; GetLocalTime(&al); SetLocalTime(&al); } if(_stricmp(recvbuf[0],'a')==0) { int i,j; BYTE a[21]; SYSTEMTIME al; for(i=1,j=0;i<22,j<21;i++,j++) { a[j]=recvbuf[i]; } memcpy(&a[1],&al,16); SetLocalTime(&al); } else { printf("From IP:[%s]:[%d]->%s\n", inet_ntoa(cli.sin_addr), ntohs(cli.sin_port),recvbuf); } } closesocket(sSocket); WSACleanup(); }