text: /*
   * WPA Supplicant - Windows/NDIS driver interface - event processing
   * Copyright (c) 2004-2005, Jouni Malinen <j@w1.fi>
   *
   * This software may be distributed under the terms of the BSD license.
   * See README for more details.
   */
  
  #include "includes.h"
  
  #include "common.h"
  #include "driver.h"
  #include "eloop.h"
  
  /* Keep this event processing in a separate file and without WinPcap headers to
   * avoid conflicts with some of the header files. */
  struct _ADAPTER;
  typedef struct _ADAPTER * LPADAPTER;
  #include "driver_ndis.h"
  
  
  void wpa_driver_ndis_event_connect(struct wpa_driver_ndis_data *drv);
  void wpa_driver_ndis_event_disconnect(struct wpa_driver_ndis_data *drv);
  void wpa_driver_ndis_event_media_specific(struct wpa_driver_ndis_data *drv,
  					  const u8 *data, size_t data_len);
  void wpa_driver_ndis_event_adapter_arrival(struct wpa_driver_ndis_data *drv);
  void wpa_driver_ndis_event_adapter_removal(struct wpa_driver_ndis_data *drv);
  
  
  enum event_types { EVENT_CONNECT, EVENT_DISCONNECT,
  		   EVENT_MEDIA_SPECIFIC, EVENT_ADAPTER_ARRIVAL,
  		   EVENT_ADAPTER_REMOVAL };
  
  /* Event data:
   * enum event_types (as int, i.e., 4 octets)
   * data length (2 octets (big endian), optional)
   * data (variable len, optional)
   */
  
  
  static void wpa_driver_ndis_event_process(struct wpa_driver_ndis_data *drv,
  					  u8 *buf, size_t len)
  {
  	u8 *pos, *data = NULL;
  	enum event_types type;
  	size_t data_len = 0;
  
  	wpa_hexdump(MSG_MSGDUMP, "NDIS: received event data", buf, len);
  	if (len < sizeof(int))
  		return;
  	type = *((int *) buf);
  	pos = buf + sizeof(int);
  	wpa_printf(MSG_DEBUG, "NDIS: event - type %d", type);
  
  	if (buf + len - pos > 2) {
  		data_len = (int) *pos++ << 8;
  		data_len += *pos++;
  		if (data_len > (size_t) (buf + len - pos)) {
  			wpa_printf(MSG_DEBUG, "NDIS: event data overflow");
  			return;
  		}
  		data = pos;
  		wpa_hexdump(MSG_MSGDUMP, "NDIS: event data", data, data_len);
  	}
  
  	switch (type) {
  	case EVENT_CONNECT:
  		wpa_driver_ndis_event_connect(drv);
  		break;
  	case EVENT_DISCONNECT:
  		wpa_driver_ndis_event_disconnect(drv);
  		break;
  	case EVENT_MEDIA_SPECIFIC:
  		wpa_driver_ndis_event_media_specific(drv, data, data_len);
  		break;
  	case EVENT_ADAPTER_ARRIVAL:
  		wpa_driver_ndis_event_adapter_arrival(drv);
  		break;
  	case EVENT_ADAPTER_REMOVAL:
  		wpa_driver_ndis_event_adapter_removal(drv);
  		break;
  	}
  }
  
  
  void wpa_driver_ndis_event_pipe_cb(void *eloop_data, void *user_data)
  {
  	struct wpa_driver_ndis_data *drv = eloop_data;
  	u8 buf[512];
  	DWORD len;
  
  	ResetEvent(drv->event_avail);
  	if (ReadFile(drv->events_pipe, buf, sizeof(buf), &len, NULL))
  		wpa_driver_ndis_event_process(drv, buf, len);
  	else {
  		wpa_printf(MSG_DEBUG, "%s: ReadFile() failed: %d", __func__,
  			   (int) GetLastError());
  	}
  }
  