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. */
17 struct _ADAPTER;
18 typedef struct _ADAPTER * LPADAPTER;
19 #include "driver_ndis.h"
20
21
22 void wpa_driver_ndis_event_connect(struct wpa_driver_ndis_data *drv);
23 void wpa_driver_ndis_event_disconnect(struct wpa_driver_ndis_data *drv);
24 void wpa_driver_ndis_event_media_specific(struct wpa_driver_ndis_data *drv,
25 const u8 *data, size_t data_len);
26 void wpa_driver_ndis_event_adapter_arrival(struct wpa_driver_ndis_data *drv);
27 void wpa_driver_ndis_event_adapter_removal(struct wpa_driver_ndis_data *drv);
28
29
30 enum 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
wpa_driver_ndis_event_process(struct wpa_driver_ndis_data * drv,u8 * buf,size_t len)41 static 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
wpa_driver_ndis_event_pipe_cb(void * eloop_data,void * user_data)86 void 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
