base/services/tcpsvcs/echo.c

   1 /*
   2  * PROJECT:     ReactOS simple TCP/IP services
   3  * LICENSE:     GPL - See COPYING in the top level directory
   4  * FILE:        /base/services/tcpsvcs/echo.c
   5  * PURPOSE:     Returns whatever input the client sends
   6  * COPYRIGHT:   Copyright 2005 - 2008 Ged Murphy <gedmurphy@reactos.org>
   7  *
   8  */
   9
  10 #include "tcpsvcs.h"
  11
  12 #define RECV_BUF 1024
  13
  14 static BOOL
  15 EchoIncomingPackets(SOCKET sock)
  16 {
  17     CHAR readBuffer[RECV_BUF];
  18     TCHAR logBuf[256];
  19     INT totalSentBytes;
  20     INT readBytes;
  21     INT retVal;
  22
  23     do
  24     {
  25         readBytes = recv(sock, readBuffer, RECV_BUF, 0);
  26         if (readBytes > 0)
  27         {
  28             _stprintf(logBuf, _T("Received %d bytes from client"), readBytes);
  29             LogEvent(logBuf, 0, 0, LOG_FILE);
  30
  31             totalSentBytes = 0;
  32             while (!bShutdown && totalSentBytes < readBytes)
  33             {
  34                 retVal = send(sock, readBuffer + totalSentBytes, readBytes - totalSentBytes, 0);
  35                 if (retVal > 0)
  36                 {
  37                     _stprintf(logBuf, _T("Sent %d bytes back to client"), retVal);
  38                     LogEvent(logBuf, 0, 0, LOG_FILE);
  39                     totalSentBytes += retVal;
  40                 }
  41                 else if (retVal == SOCKET_ERROR)
  42                 {
  43                     LogEvent(_T("Echo: socket error"), WSAGetLastError(), 0, LOG_ERROR);
  44                     return FALSE;
  45                 }
  46                 else
  47                 {
  48                     /* Client closed connection before we could reply to
  49                        all the data it sent, so quit early. */
  50                     LogEvent(_T("Peer unexpectedly dropped connection!"), 0, 0, LOG_FILE);
  51                     return FALSE;
  52                 }
  53             }
  54         }
  55         else if (readBytes == SOCKET_ERROR)
  56         {
  57             LogEvent(_T("Echo: socket error"), WSAGetLastError(), 0, LOG_ERROR);
  58             return FALSE;
  59         }
  60     } while ((readBytes != 0) && (!bShutdown));
  61
  62     if (!bShutdown)
  63         LogEvent(_T("Echo: Connection closed by peer"), 0, 0, LOG_FILE);
  64
  65     return TRUE;
  66 }
  67
  68 DWORD WINAPI
  69 EchoHandler(VOID* sock_)
  70 {
  71     DWORD retVal = 0;
  72     SOCKET sock = (SOCKET)sock_;
  73
  74     if (!EchoIncomingPackets(sock))
  75     {
  76         LogEvent(_T("Echo: EchoIncomingPackets failed"), 0, 0, LOG_FILE);
  77         retVal = 1;
  78     }
  79
  80     LogEvent(_T("Echo: Shutting connection down"), 0, 0, LOG_FILE);
  81
  82     if (ShutdownConnection(sock, TRUE))
  83     {
  84         LogEvent(_T("Echo: Connection is down"), 0, 0, LOG_FILE);
  85     }
  86     else
  87     {
  88         LogEvent(_T("Echo: Connection shutdown failed"), 0, 0, LOG_FILE);
  89         retVal = 1;
  90     }
  91
  92     LogEvent(_T("Echo: Terminating thread"), 0, 0, LOG_FILE);
  93     ExitThread(retVal);
  94 }