1/*
2 * WPA Supplicant - Windows/NDIS driver interface - event processing
3 * Copyright (c) 2004-2005, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "includes.h"
10
11#include "common.h"
12#include "driver.h"
13#include "eloop.h"
14
15/* Keep this event processing in a separate file and without WinPcap headers to
16 * avoid conflicts with some of the header files. */
17struct _ADAPTER;
18typedef struct _ADAPTER * LPADAPTER;
19#include "driver_ndis.h"
20
21
22void wpa_driver_ndis_event_connect(struct wpa_driver_ndis_data *drv);
23void wpa_driver_ndis_event_disconnect(struct wpa_driver_ndis_data *drv);
24void wpa_driver_ndis_event_media_specific(struct wpa_driver_ndis_data *drv,
25					  const u8 *data, size_t data_len);
26void wpa_driver_ndis_event_adapter_arrival(struct wpa_driver_ndis_data *drv);
27void wpa_driver_ndis_event_adapter_removal(struct wpa_driver_ndis_data *drv);
28
29
30enum event_types { EVENT_CONNECT, EVENT_DISCONNECT,
31		   EVENT_MEDIA_SPECIFIC, EVENT_ADAPTER_ARRIVAL,
32		   EVENT_ADAPTER_REMOVAL };
33
34/* Event data:
35 * enum event_types (as int, i.e., 4 octets)
36 * data length (2 octets (big endian), optional)
37 * data (variable len, optional)
38 */
39
40
41static void wpa_driver_ndis_event_process(struct wpa_driver_ndis_data *drv,
42					  u8 *buf, size_t len)
43{
44	u8 *pos, *data = NULL;
45	enum event_types type;
46	size_t data_len = 0;
47
48	wpa_hexdump(MSG_MSGDUMP, "NDIS: received event data", buf, len);
49	if (len < sizeof(int))
50		return;
51	type = *((int *) buf);
52	pos = buf + sizeof(int);
53	wpa_printf(MSG_DEBUG, "NDIS: event - type %d", type);
54
55	if (buf + len - pos > 2) {
56		data_len = (int) *pos++ << 8;
57		data_len += *pos++;
58		if (data_len > (size_t) (buf + len - pos)) {
59			wpa_printf(MSG_DEBUG, "NDIS: event data overflow");
60			return;
61		}
62		data = pos;
63		wpa_hexdump(MSG_MSGDUMP, "NDIS: event data", data, data_len);
64	}
65
66	switch (type) {
67	case EVENT_CONNECT:
68		wpa_driver_ndis_event_connect(drv);
69		break;
70	case EVENT_DISCONNECT:
71		wpa_driver_ndis_event_disconnect(drv);
72		break;
73	case EVENT_MEDIA_SPECIFIC:
74		wpa_driver_ndis_event_media_specific(drv, data, data_len);
75		break;
76	case EVENT_ADAPTER_ARRIVAL:
77		wpa_driver_ndis_event_adapter_arrival(drv);
78		break;
79	case EVENT_ADAPTER_REMOVAL:
80		wpa_driver_ndis_event_adapter_removal(drv);
81		break;
82	}
83}
84
85
86void wpa_driver_ndis_event_pipe_cb(void *eloop_data, void *user_data)
87{
88	struct wpa_driver_ndis_data *drv = eloop_data;
89	u8 buf[512];
90	DWORD len;
91
92	ResetEvent(drv->event_avail);
93	if (ReadFile(drv->events_pipe, buf, sizeof(buf), &len, NULL))
94		wpa_driver_ndis_event_process(drv, buf, len);
95	else {
96		wpa_printf(MSG_DEBUG, "%s: ReadFile() failed: %d", __func__,
97			   (int) GetLastError());
98	}
99}
100