date time server&client

windows date time server:

#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <sstream>

using namespace std;

#pragma comment(lib,"Ws2_32.lib")

#define IP_ADDRESS "210.47.24.11"
#define PORT 13

int main()
{
       WSADATA Ws;
       SOCKET ServerSocket, CientSocket;
       struct sockaddr_in LocalAddr, ClientAddr;
       int Ret = 0;
       int AddrLen = 0;
       HANDLE hThread = NULL;

      //Init Windows Socket
      if ( WSAStartup(MAKEWORD(2,2), &Ws) != 0 )
      {
          cout<<"Init Windows Socket Failed::"<<GetLastError()<<endl;
          return -1;
      }

       //Create Socket
       ServerSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
      if ( ServerSocket == INVALID_SOCKET )
      {
          cout<<"Create Socket Failed::"<<GetLastError()<<endl;
          return -1;
      }

      LocalAddr.sin_family = AF_INET;
      LocalAddr.sin_addr.s_addr = inet_addr(IP_ADDRESS);
      LocalAddr.sin_port = htons(PORT);
      memset(LocalAddr.sin_zero, 0x00, 8);

      //Bind Socket
      Ret = bind(ServerSocket, (struct sockaddr*)&LocalAddr, sizeof(LocalAddr));
      if ( Ret != 0 )
      {
          cout<<"Bind Socket Failed::"<<GetLastError()<<endl;
          return -1;
     }

     Ret = listen(ServerSocket, PORT);
     if ( Ret != 0 )
     {
         cout<<"listen Socket Failed::"<<GetLastError()<<endl;
         return -1;
     }
     cout<<"server startup"<<endl;
     AddrLen = sizeof(ClientAddr);
     CientSocket = accept(ServerSocket, (struct sockaddr*)&ClientAddr, &AddrLen);
     if ( CientSocket == INVALID_SOCKET )
     {
         cout<<"Accept Failed::"<<GetLastError()<<endl;
     }

     cout<<"client connect::"<<inet_ntoa(ClientAddr.sin_addr)<<":"<<ClientAddr.sin_port<<endl;

     stringstream ss;
     string str;
     SYSTEMTIME systime;
     GetLocalTime(&systime);
     ss<<systime.wYear<<"-"<<systime.wMonth<<"-"<<systime.wDay<<" "<<systime.wHour<<":"<<systime.wMinute<<":"<<systime.wSecond;
     str=ss.str();

    // cout<<str<<endl;
     const char *buf = str.c_str();
//     cout<<systime.wYear<<"-"<<systime.wMonth<<"-"<<systime.wDay<<" "<<systime.wHour<<":"<<systime.wMinute<<":"<<systime.wSecond<<endl;
     send(CientSocket,buf,strlen(buf)+1,0);
     closesocket(ServerSocket);
     closesocket(CientSocket);
     WSACleanup();

     system("pause");
    return 1;
}

linux get date time client:

#include<netinet/in.h>
#include<stdlib.h>
#include<stdio.h>
#include<errno.h>
#include<stdarg.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<sys/un.h>
#define MAXLINE 4096

int main(int argc, char **argv)
{
int sockfd,n;
char recvline[MAXLINE+1];
struct sockaddr_in servaddr;

if(argc!=2)
    printf("usage:a.out);

if((sockfd=socket(AF_INET,SOCK_STREAM,0))<0)
    printf("socket error");
bzero(&servaddr,sizeof(servaddr));
servaddr.sin_family=AF_INET;
servaddr.sin_port = htons(13);
if(inet_pton(AF_INET,argv[1],&servaddr.sin_addr)<=0)
    printf("inet_pton error for %s",argv[1]);

if(connect(sockfd,(struct sockaddr *)&servaddr,sizeof(servaddr))<0)
    printf("fconnect error");
while((n=read(sockfd,recvline,MAXLINE))>0)
{
    recvline[n]=0;
if(fputs(recvline,stdout)==EOF)
    printf("fputs error");
    printf("\n");
}
if(n<0) printf("read error");
    exit(0);
}