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 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 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