1 /* 2 * WPA Supplicant - Windows/NDIS driver interface - event processing 3 * Copyright (c) 2004-2005, Jouni Malinen <j (at) 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 "wpa_supplicant.h" 20 #include "l2_packet.h" 21 #include "eloop.h" 22 #include "wpa.h" 23 24 /* Keep this event processing in a separate file and without WinPcap headers to 25 * avoid conflicts with some of the header files. */ 26 struct _ADAPTER; 27 typedef struct _ADAPTER * LPADAPTER; 28 #include "driver_ndis.h" 29 30 31 void wpa_driver_ndis_event_connect(struct wpa_driver_ndis_data *drv); 32 void wpa_driver_ndis_event_disconnect(struct wpa_driver_ndis_data *drv); 33 void wpa_driver_ndis_event_media_specific(struct wpa_driver_ndis_data *drv, 34 const u8 *data, size_t data_len); 35 void wpa_driver_ndis_event_adapter_arrival(struct wpa_driver_ndis_data *drv); 36 void wpa_driver_ndis_event_adapter_removal(struct wpa_driver_ndis_data *drv); 37 38 39 enum event_types { EVENT_CONNECT, EVENT_DISCONNECT, 40 EVENT_MEDIA_SPECIFIC, EVENT_ADAPTER_ARRIVAL, 41 EVENT_ADAPTER_REMOVAL }; 42 43 /* Event data: 44 * enum event_types (as int, i.e., 4 octets) 45 * data length (2 octets (big endian), optional) 46 * data (variable len, optional) 47 */ 48 49 50 static void wpa_driver_ndis_event_process(struct wpa_driver_ndis_data *drv, 51 u8 *buf, size_t len) 52 { 53 u8 *pos, *data = NULL; 54 enum event_types type; 55 size_t data_len = 0; 56 57 wpa_hexdump(MSG_MSGDUMP, "NDIS: received event data", buf, len); 58 if (len < sizeof(int)) 59 return; 60 type = *((int *) buf); 61 pos = buf + sizeof(int); 62 wpa_printf(MSG_DEBUG, "NDIS: event - type %d", type); 63 64 if (buf + len - pos > 2) { 65 data_len = (int) *pos++ << 8; 66 data_len += *pos++; 67 if (data_len > (size_t) (buf + len - pos)) { 68 wpa_printf(MSG_DEBUG, "NDIS: event data overflow"); 69 return; 70 } 71 data = pos; 72 wpa_hexdump(MSG_MSGDUMP, "NDIS: event data", data, data_len); 73 } 74 75 switch (type) { 76 case EVENT_CONNECT: 77 wpa_driver_ndis_event_connect(drv); 78 break; 79 case EVENT_DISCONNECT: 80 wpa_driver_ndis_event_disconnect(drv); 81 break; 82 case EVENT_MEDIA_SPECIFIC: 83 wpa_driver_ndis_event_media_specific(drv, data, data_len); 84 break; 85 case EVENT_ADAPTER_ARRIVAL: 86 wpa_driver_ndis_event_adapter_arrival(drv); 87 break; 88 case EVENT_ADAPTER_REMOVAL: 89 wpa_driver_ndis_event_adapter_removal(drv); 90 break; 91 } 92 } 93 94 95 void wpa_driver_ndis_event_pipe_cb(void *eloop_data, void *user_data) 96 { 97 struct wpa_driver_ndis_data *drv = eloop_data; 98 u8 buf[512]; 99 DWORD len; 100 101 ResetEvent(drv->event_avail); 102 if (ReadFile(drv->events_pipe, buf, sizeof(buf), &len, NULL)) 103 wpa_driver_ndis_event_process(drv, buf, len); 104 else { 105 wpa_printf(MSG_DEBUG, "%s: ReadFile() failed: %d", __func__, 106 (int) GetLastError()); 107 } 108 } 109
