1 /* 2 * WPA Supplicant - Windows/NDIS driver interface - event processing 3 * Copyright (c) 2004-2005, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #include "includes.h" 16 17 #include "common.h" 18 #include "driver.h" 19 #include "eloop.h" 20 21 /* Keep this event processing in a separate file and without WinPcap headers to 22 * avoid conflicts with some of the header files. */ 23 struct _ADAPTER; 24 typedef struct _ADAPTER * LPADAPTER; 25 #include "driver_ndis.h" 26 27 28 void wpa_driver_ndis_event_connect(struct wpa_driver_ndis_data *drv); 29 void wpa_driver_ndis_event_disconnect(struct wpa_driver_ndis_data *drv); 30 void wpa_driver_ndis_event_media_specific(struct wpa_driver_ndis_data *drv, 31 const u8 *data, size_t data_len); 32 void wpa_driver_ndis_event_adapter_arrival(struct wpa_driver_ndis_data *drv); 33 void wpa_driver_ndis_event_adapter_removal(struct wpa_driver_ndis_data *drv); 34 35 36 enum event_types { EVENT_CONNECT, EVENT_DISCONNECT, 37 EVENT_MEDIA_SPECIFIC, EVENT_ADAPTER_ARRIVAL, 38 EVENT_ADAPTER_REMOVAL }; 39 40 /* Event data: 41 * enum event_types (as int, i.e., 4 octets) 42 * data length (2 octets (big endian), optional) 43 * data (variable len, optional) 44 */ 45 46 47 static void wpa_driver_ndis_event_process(struct wpa_driver_ndis_data *drv, 48 u8 *buf, size_t len) 49 { 50 u8 *pos, *data = NULL; 51 enum event_types type; 52 size_t data_len = 0; 53 54 wpa_hexdump(MSG_MSGDUMP, "NDIS: received event data", buf, len); 55 if (len < sizeof(int)) 56 return; 57 type = *((int *) buf); 58 pos = buf + sizeof(int); 59 wpa_printf(MSG_DEBUG, "NDIS: event - type %d", type); 60 61 if (buf + len - pos > 2) { 62 data_len = (int) *pos++ << 8; 63 data_len += *pos++; 64 if (data_len > (size_t) (buf + len - pos)) { 65 wpa_printf(MSG_DEBUG, "NDIS: event data overflow"); 66 return; 67 } 68 data = pos; 69 wpa_hexdump(MSG_MSGDUMP, "NDIS: event data", data, data_len); 70 } 71 72 switch (type) { 73 case EVENT_CONNECT: 74 wpa_driver_ndis_event_connect(drv); 75 break; 76 case EVENT_DISCONNECT: 77 wpa_driver_ndis_event_disconnect(drv); 78 break; 79 case EVENT_MEDIA_SPECIFIC: 80 wpa_driver_ndis_event_media_specific(drv, data, data_len); 81 break; 82 case EVENT_ADAPTER_ARRIVAL: 83 wpa_driver_ndis_event_adapter_arrival(drv); 84 break; 85 case EVENT_ADAPTER_REMOVAL: 86 wpa_driver_ndis_event_adapter_removal(drv); 87 break; 88 } 89 } 90 91 92 void wpa_driver_ndis_event_pipe_cb(void *eloop_data, void *user_data) 93 { 94 struct wpa_driver_ndis_data *drv = eloop_data; 95 u8 buf[512]; 96 DWORD len; 97 98 ResetEvent(drv->event_avail); 99 if (ReadFile(drv->events_pipe, buf, sizeof(buf), &len, NULL)) 100 wpa_driver_ndis_event_process(drv, buf, len); 101 else { 102 wpa_printf(MSG_DEBUG, "%s: ReadFile() failed: %d", __func__, 103 (int) GetLastError()); 104 } 105 } 106