text: /*
   *  COPYRIGHT (c) 1989-2012.
   *  On-Line Applications Research Corporation (OAR).
   *
   *  The license and distribution terms for this file may be
   *  found in the file LICENSE in this distribution or at
   *  http://www.rtems.org/license/LICENSE.
   */
  
  #ifdef HAVE_CONFIG_H
  #include "config.h"
  #endif
  
  #include <tmacros.h>
  #include <termios.h>
  #include <rtems/termiostypes.h>
  #include <rtems/dumpbuf.h>
  
  /* forward declarations to avoid warnings */
  void ppp_test_driver_set_rx(const char *expected, size_t len);
  void pppasyncattach(void);
  int  pppopen(struct rtems_termios_tty *tty);
  int  pppclose(struct rtems_termios_tty *tty);
  int  pppread(struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args);
  int  pppwrite(struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args);
  int  pppioctl(struct rtems_termios_tty *tty, rtems_libio_ioctl_args_t *args);
  int  pppinput(int c, struct rtems_termios_tty *tty);
  int  pppstart(struct rtems_termios_tty *tp);
  
  /*
   * Define the PPP line discipline.
   */
  
  static struct rtems_termios_linesw pppdisc = {
    pppopen, pppclose, pppread, pppwrite,
    pppinput, pppstart, pppioctl, NULL
  };
  
  const char *RXExpected;
  size_t      RXLength;
  
  void ppp_test_driver_set_rx( const char *expected, size_t len )
  {
    RXExpected = expected;
    RXLength   = len;
  }
  
  void pppasyncattach(void)
  {
    rtems_termios_linesw[PPPDISC] = pppdisc;
  }
  
  int  pppopen(struct rtems_termios_tty *tty)
  {
    puts( "pppopen called" );
    return 0;
  }
  
  int  pppclose(struct rtems_termios_tty *tty)
  {
    puts( "pppclose called" );
    return 0;
  }
  
  int  pppread(struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args)
  {
    puts( "pppread called" );
    
    rtems_termios_enqueue_raw_characters( tty, (char *)RXExpected, RXLength );
    
    RXExpected = NULL;
    RXLength = 0;
    return 0;
  }
  
  int  pppwrite(struct rtems_termios_tty *tty, rtems_libio_rw_args_t *rw_args)
  {
    int                           maximum    = rw_args->count;
    char                         *out_buffer = rw_args->buffer; 
  
    printf( "pppwrite called - %d bytes\n", maximum );
    rtems_print_buffer( (unsigned char *) out_buffer, maximum );
    rw_args->bytes_moved = maximum;
    rtems_termios_dequeue_characters( tty, 1 );
    return 0;
  }
  
  int  pppioctl(struct rtems_termios_tty *tty, rtems_libio_ioctl_args_t *args)
  {
    puts( "pppioctl called" );
    return 0;
  }
  
  int  pppinput(int c, struct rtems_termios_tty *tty)
  {
    printf( "pppinput called - with (%c)\n", c );
    return 0;
  }
  
  int  pppstart(struct rtems_termios_tty *tp)
  {
    puts( "pppstart called" );
    return 0;
  }
  
  
  