TestSerialChars.c

 
#include <stdio.h>
#include <sys/stat.h>
 
#ifndef _WIN32
#include <termios.h>
#endif
 
#include <winpr/comm.h>
#include <winpr/crt.h>
 
#include "../comm.h"
 
static BOOL test_SerCxSys(HANDLE hComm)
{
  DCB dcb = { 0 };
  UCHAR XonChar = 0;
  UCHAR XoffChar = 0;
 
  struct termios currentTermios = { 0 };
 
  if (tcgetattr(((WINPR_COMM*)hComm)->fd, &currentTermios) < 0)
  {
    (void)fprintf(stderr, "tcgetattr failure.\n");
    return FALSE;
  }
 
  dcb.DCBlength = sizeof(DCB);
  if (!GetCommState(hComm, &dcb))
  {
    (void)fprintf(stderr, "GetCommState failure, GetLastError(): 0x%08x\n", GetLastError());
    return FALSE;
  }
 
  if ((dcb.XonChar == '\0') || (dcb.XoffChar == '\0'))
  {
    (void)fprintf(stderr, "test_SerCxSys failure, expected XonChar and XoffChar to be set\n");
    return FALSE;
  }
 
  /* retrieve Xon/Xoff chars */
  if ((dcb.XonChar != currentTermios.c_cc[VSTART]) ||
      (dcb.XoffChar != currentTermios.c_cc[VSTOP]))
  {
    (void)fprintf(stderr, "test_SerCxSys failure, could not retrieve XonChar and XoffChar\n");
    return FALSE;
  }
 
  /* swap XonChar/XoffChar */
 
  XonChar = dcb.XonChar;
  XoffChar = dcb.XoffChar;
  dcb.XonChar = XoffChar;
  dcb.XoffChar = XonChar;
  if (!SetCommState(hComm, &dcb))
  {
    (void)fprintf(stderr, "SetCommState failure, GetLastError(): 0x%08x\n", GetLastError());
    return FALSE;
  }
 
  ZeroMemory(&dcb, sizeof(DCB));
  dcb.DCBlength = sizeof(DCB);
  if (!GetCommState(hComm, &dcb))
  {
    (void)fprintf(stderr, "GetCommState failure, GetLastError(): 0x%08x\n", GetLastError());
    return FALSE;
  }
 
  if ((dcb.XonChar != XoffChar) || (dcb.XoffChar != XonChar))
  {
    (void)fprintf(stderr, "test_SerCxSys, expected XonChar and XoffChar to be swapped\n");
    return FALSE;
  }
 
  /* same XonChar / XoffChar */
  dcb.XonChar = dcb.XoffChar;
  if (SetCommState(hComm, &dcb))
  {
    (void)fprintf(stderr,
                  "test_SerCxSys failure, SetCommState() was supposed to failed because "
                  "XonChar and XoffChar are the same\n");
    return FALSE;
  }
  if (GetLastError() != ERROR_INVALID_PARAMETER)
  {
    (void)fprintf(stderr, "test_SerCxSys failure, SetCommState() was supposed to failed with "
                          "GetLastError()=ERROR_INVALID_PARAMETER\n");
    return FALSE;
  }
 
  return TRUE;
}
 
static BOOL test_SerCx2Sys(HANDLE hComm)
{
  DCB dcb = { 0 };
 
  dcb.DCBlength = sizeof(DCB);
  if (!GetCommState(hComm, &dcb))
  {
    (void)fprintf(stderr, "GetCommState failure; GetLastError(): %08x\n", GetLastError());
    return FALSE;
  }
 
  if ((dcb.ErrorChar != '\0') || (dcb.EofChar != '\0') || (dcb.EvtChar != '\0') ||
      (dcb.XonChar != '\0') || (dcb.XoffChar != '\0'))
  {
    (void)fprintf(stderr, "test_SerCx2Sys failure, expected all characters to be: '\\0'\n");
    return FALSE;
  }
 
  return TRUE;
}
 
int TestSerialChars(int argc, char* argv[])
{
  struct stat statbuf = { 0 };
  BOOL result = 0;
  HANDLE hComm = NULL;
 
  if (stat("/dev/ttyS0", &statbuf) < 0)
  {
    (void)fprintf(stderr, "/dev/ttyS0 not available, making the test to succeed though\n");
    return EXIT_SUCCESS;
  }
 
  result = DefineCommDevice("COM1", "/dev/ttyS0");
  if (!result)
  {
    (void)fprintf(stderr, "DefineCommDevice failure: 0x%x\n", GetLastError());
    return EXIT_FAILURE;
  }
 
  hComm = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
  if (hComm == INVALID_HANDLE_VALUE)
  {
    (void)fprintf(stderr, "CreateFileA failure: 0x%x\n", GetLastError());
    return EXIT_FAILURE;
  }
 
  _comm_setServerSerialDriver(hComm, SerialDriverSerCxSys);
  if (!test_SerCxSys(hComm))
  {
    (void)fprintf(stderr, "test_SerCxSys failure\n");
    return EXIT_FAILURE;
  }
 
  _comm_setServerSerialDriver(hComm, SerialDriverSerCx2Sys);
  if (!test_SerCx2Sys(hComm))
  {
    (void)fprintf(stderr, "test_SerCxSys failure\n");
    return EXIT_FAILURE;
  }
 
  if (!CloseHandle(hComm))
  {
    (void)fprintf(stderr, "CloseHandle failure, GetLastError()=%08x\n", GetLastError());
    return EXIT_FAILURE;
  }
 
  return EXIT_SUCCESS;
}