597 строки
16 KiB
C
597 строки
16 KiB
C
/*
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* IEEE 802.11 defines
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*
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* Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
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* <jkmaline@cc.hut.fi>
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* Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
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* Copyright (c) 2005, Devicescape Software, Inc.
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* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef IEEE80211_H
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#define IEEE80211_H
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#include <linux/types.h>
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#include <asm/byteorder.h>
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#define FCS_LEN 4
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#define IEEE80211_FCTL_VERS 0x0003
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#define IEEE80211_FCTL_FTYPE 0x000c
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#define IEEE80211_FCTL_STYPE 0x00f0
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#define IEEE80211_FCTL_TODS 0x0100
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#define IEEE80211_FCTL_FROMDS 0x0200
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#define IEEE80211_FCTL_MOREFRAGS 0x0400
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#define IEEE80211_FCTL_RETRY 0x0800
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#define IEEE80211_FCTL_PM 0x1000
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#define IEEE80211_FCTL_MOREDATA 0x2000
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#define IEEE80211_FCTL_PROTECTED 0x4000
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#define IEEE80211_FCTL_ORDER 0x8000
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#define IEEE80211_SCTL_FRAG 0x000F
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#define IEEE80211_SCTL_SEQ 0xFFF0
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#define IEEE80211_FTYPE_MGMT 0x0000
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#define IEEE80211_FTYPE_CTL 0x0004
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#define IEEE80211_FTYPE_DATA 0x0008
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/* management */
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#define IEEE80211_STYPE_ASSOC_REQ 0x0000
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#define IEEE80211_STYPE_ASSOC_RESP 0x0010
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#define IEEE80211_STYPE_REASSOC_REQ 0x0020
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#define IEEE80211_STYPE_REASSOC_RESP 0x0030
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#define IEEE80211_STYPE_PROBE_REQ 0x0040
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#define IEEE80211_STYPE_PROBE_RESP 0x0050
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#define IEEE80211_STYPE_BEACON 0x0080
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#define IEEE80211_STYPE_ATIM 0x0090
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#define IEEE80211_STYPE_DISASSOC 0x00A0
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#define IEEE80211_STYPE_AUTH 0x00B0
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#define IEEE80211_STYPE_DEAUTH 0x00C0
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#define IEEE80211_STYPE_ACTION 0x00D0
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/* control */
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#define IEEE80211_STYPE_BACK_REQ 0x0080
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#define IEEE80211_STYPE_BACK 0x0090
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#define IEEE80211_STYPE_PSPOLL 0x00A0
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#define IEEE80211_STYPE_RTS 0x00B0
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#define IEEE80211_STYPE_CTS 0x00C0
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#define IEEE80211_STYPE_ACK 0x00D0
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#define IEEE80211_STYPE_CFEND 0x00E0
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#define IEEE80211_STYPE_CFENDACK 0x00F0
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/* data */
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#define IEEE80211_STYPE_DATA 0x0000
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#define IEEE80211_STYPE_DATA_CFACK 0x0010
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#define IEEE80211_STYPE_DATA_CFPOLL 0x0020
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#define IEEE80211_STYPE_DATA_CFACKPOLL 0x0030
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#define IEEE80211_STYPE_NULLFUNC 0x0040
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#define IEEE80211_STYPE_CFACK 0x0050
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#define IEEE80211_STYPE_CFPOLL 0x0060
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#define IEEE80211_STYPE_CFACKPOLL 0x0070
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#define IEEE80211_STYPE_QOS_DATA 0x0080
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#define IEEE80211_STYPE_QOS_DATA_CFACK 0x0090
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#define IEEE80211_STYPE_QOS_DATA_CFPOLL 0x00A0
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#define IEEE80211_STYPE_QOS_DATA_CFACKPOLL 0x00B0
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#define IEEE80211_STYPE_QOS_NULLFUNC 0x00C0
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#define IEEE80211_STYPE_QOS_CFACK 0x00D0
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#define IEEE80211_STYPE_QOS_CFPOLL 0x00E0
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#define IEEE80211_STYPE_QOS_CFACKPOLL 0x00F0
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/* miscellaneous IEEE 802.11 constants */
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#define IEEE80211_MAX_FRAG_THRESHOLD 2352
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#define IEEE80211_MAX_RTS_THRESHOLD 2353
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#define IEEE80211_MAX_AID 2007
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#define IEEE80211_MAX_TIM_LEN 251
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/* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
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6.2.1.1.2.
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802.11e clarifies the figure in section 7.1.2. The frame body is
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up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */
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#define IEEE80211_MAX_DATA_LEN 2304
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/* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
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#define IEEE80211_MAX_FRAME_LEN 2352
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#define IEEE80211_MAX_SSID_LEN 32
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#define IEEE80211_MAX_MESH_ID_LEN 32
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struct ieee80211_hdr {
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__le16 frame_control;
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__le16 duration_id;
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u8 addr1[6];
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u8 addr2[6];
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u8 addr3[6];
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__le16 seq_ctrl;
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u8 addr4[6];
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} __attribute__ ((packed));
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struct ieee80211s_hdr {
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u8 flags;
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u8 ttl;
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u8 seqnum[3];
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u8 eaddr1[6];
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u8 eaddr2[6];
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u8 eaddr3[6];
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} __attribute__ ((packed));
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struct ieee80211_mgmt {
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__le16 frame_control;
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__le16 duration;
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u8 da[6];
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u8 sa[6];
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u8 bssid[6];
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__le16 seq_ctrl;
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union {
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struct {
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__le16 auth_alg;
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__le16 auth_transaction;
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__le16 status_code;
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/* possibly followed by Challenge text */
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u8 variable[0];
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} __attribute__ ((packed)) auth;
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struct {
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__le16 reason_code;
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} __attribute__ ((packed)) deauth;
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struct {
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__le16 capab_info;
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__le16 listen_interval;
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/* followed by SSID and Supported rates */
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u8 variable[0];
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} __attribute__ ((packed)) assoc_req;
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struct {
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__le16 capab_info;
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__le16 status_code;
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__le16 aid;
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/* followed by Supported rates */
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u8 variable[0];
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} __attribute__ ((packed)) assoc_resp, reassoc_resp;
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struct {
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__le16 capab_info;
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__le16 listen_interval;
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u8 current_ap[6];
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/* followed by SSID and Supported rates */
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u8 variable[0];
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} __attribute__ ((packed)) reassoc_req;
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struct {
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__le16 reason_code;
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} __attribute__ ((packed)) disassoc;
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struct {
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__le64 timestamp;
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__le16 beacon_int;
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__le16 capab_info;
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/* followed by some of SSID, Supported rates,
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* FH Params, DS Params, CF Params, IBSS Params, TIM */
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u8 variable[0];
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} __attribute__ ((packed)) beacon;
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struct {
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/* only variable items: SSID, Supported rates */
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u8 variable[0];
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} __attribute__ ((packed)) probe_req;
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struct {
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__le64 timestamp;
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__le16 beacon_int;
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__le16 capab_info;
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/* followed by some of SSID, Supported rates,
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* FH Params, DS Params, CF Params, IBSS Params */
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u8 variable[0];
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} __attribute__ ((packed)) probe_resp;
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struct {
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u8 category;
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union {
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struct {
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u8 action_code;
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u8 dialog_token;
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u8 status_code;
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u8 variable[0];
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} __attribute__ ((packed)) wme_action;
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struct{
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u8 action_code;
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u8 element_id;
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u8 length;
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u8 switch_mode;
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u8 new_chan;
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u8 switch_count;
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} __attribute__((packed)) chan_switch;
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struct{
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u8 action_code;
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u8 dialog_token;
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__le16 capab;
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__le16 timeout;
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__le16 start_seq_num;
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} __attribute__((packed)) addba_req;
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struct{
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u8 action_code;
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u8 dialog_token;
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__le16 status;
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__le16 capab;
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__le16 timeout;
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} __attribute__((packed)) addba_resp;
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struct{
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u8 action_code;
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__le16 params;
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__le16 reason_code;
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} __attribute__((packed)) delba;
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struct{
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u8 action_code;
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/* capab_info for open and confirm,
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* reason for close
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*/
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__le16 aux;
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/* Followed in plink_confirm by status
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* code, AID and supported rates,
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* and directly by supported rates in
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* plink_open and plink_close
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*/
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u8 variable[0];
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} __attribute__((packed)) plink_action;
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struct{
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u8 action_code;
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u8 variable[0];
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} __attribute__((packed)) mesh_action;
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} u;
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} __attribute__ ((packed)) action;
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} u;
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} __attribute__ ((packed));
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/* Control frames */
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struct ieee80211_rts {
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__le16 frame_control;
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__le16 duration;
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u8 ra[6];
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u8 ta[6];
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} __attribute__ ((packed));
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struct ieee80211_cts {
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__le16 frame_control;
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__le16 duration;
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u8 ra[6];
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} __attribute__ ((packed));
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/**
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* struct ieee80211_bar - HT Block Ack Request
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*
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* This structure refers to "HT BlockAckReq" as
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* described in 802.11n draft section 7.2.1.7.1
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*/
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struct ieee80211_bar {
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__le16 frame_control;
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__le16 duration;
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__u8 ra[6];
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__u8 ta[6];
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__le16 control;
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__le16 start_seq_num;
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} __attribute__((packed));
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/**
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* struct ieee80211_ht_cap - HT capabilities
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*
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* This structure refers to "HT capabilities element" as
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* described in 802.11n draft section 7.3.2.52
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*/
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struct ieee80211_ht_cap {
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__le16 cap_info;
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u8 ampdu_params_info;
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u8 supp_mcs_set[16];
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__le16 extended_ht_cap_info;
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__le32 tx_BF_cap_info;
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u8 antenna_selection_info;
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} __attribute__ ((packed));
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/**
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* struct ieee80211_ht_cap - HT additional information
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*
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* This structure refers to "HT information element" as
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* described in 802.11n draft section 7.3.2.53
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*/
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struct ieee80211_ht_addt_info {
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u8 control_chan;
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u8 ht_param;
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__le16 operation_mode;
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__le16 stbc_param;
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u8 basic_set[16];
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} __attribute__ ((packed));
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/* 802.11n HT capabilities masks */
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#define IEEE80211_HT_CAP_SUP_WIDTH 0x0002
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#define IEEE80211_HT_CAP_MIMO_PS 0x000C
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#define IEEE80211_HT_CAP_GRN_FLD 0x0010
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#define IEEE80211_HT_CAP_SGI_20 0x0020
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#define IEEE80211_HT_CAP_SGI_40 0x0040
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#define IEEE80211_HT_CAP_DELAY_BA 0x0400
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#define IEEE80211_HT_CAP_MAX_AMSDU 0x0800
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#define IEEE80211_HT_CAP_AMPDU_FACTOR 0x03
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#define IEEE80211_HT_CAP_AMPDU_DENSITY 0x1C
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/* 802.11n HT IE masks */
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#define IEEE80211_HT_IE_CHA_SEC_OFFSET 0x03
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#define IEEE80211_HT_IE_CHA_WIDTH 0x04
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#define IEEE80211_HT_IE_HT_PROTECTION 0x0003
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#define IEEE80211_HT_IE_NON_GF_STA_PRSNT 0x0004
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#define IEEE80211_HT_IE_NON_HT_STA_PRSNT 0x0010
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/* MIMO Power Save Modes */
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#define WLAN_HT_CAP_MIMO_PS_STATIC 0
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#define WLAN_HT_CAP_MIMO_PS_DYNAMIC 1
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#define WLAN_HT_CAP_MIMO_PS_INVALID 2
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#define WLAN_HT_CAP_MIMO_PS_DISABLED 3
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/* Authentication algorithms */
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#define WLAN_AUTH_OPEN 0
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#define WLAN_AUTH_SHARED_KEY 1
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#define WLAN_AUTH_FAST_BSS_TRANSITION 2
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#define WLAN_AUTH_LEAP 128
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#define WLAN_AUTH_CHALLENGE_LEN 128
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#define WLAN_CAPABILITY_ESS (1<<0)
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#define WLAN_CAPABILITY_IBSS (1<<1)
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#define WLAN_CAPABILITY_CF_POLLABLE (1<<2)
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#define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
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#define WLAN_CAPABILITY_PRIVACY (1<<4)
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#define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
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#define WLAN_CAPABILITY_PBCC (1<<6)
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#define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
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/* 802.11h */
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#define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8)
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#define WLAN_CAPABILITY_QOS (1<<9)
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#define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
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#define WLAN_CAPABILITY_DSSS_OFDM (1<<13)
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/* 802.11g ERP information element */
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#define WLAN_ERP_NON_ERP_PRESENT (1<<0)
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#define WLAN_ERP_USE_PROTECTION (1<<1)
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#define WLAN_ERP_BARKER_PREAMBLE (1<<2)
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/* WLAN_ERP_BARKER_PREAMBLE values */
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enum {
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WLAN_ERP_PREAMBLE_SHORT = 0,
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WLAN_ERP_PREAMBLE_LONG = 1,
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};
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/* Status codes */
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enum ieee80211_statuscode {
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WLAN_STATUS_SUCCESS = 0,
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WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
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WLAN_STATUS_CAPS_UNSUPPORTED = 10,
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WLAN_STATUS_REASSOC_NO_ASSOC = 11,
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WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
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WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
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WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
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WLAN_STATUS_CHALLENGE_FAIL = 15,
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WLAN_STATUS_AUTH_TIMEOUT = 16,
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WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
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WLAN_STATUS_ASSOC_DENIED_RATES = 18,
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/* 802.11b */
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WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
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WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
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WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
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/* 802.11h */
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WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
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WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
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WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
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/* 802.11g */
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WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
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WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
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/* 802.11i */
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WLAN_STATUS_INVALID_IE = 40,
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WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
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WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
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WLAN_STATUS_INVALID_AKMP = 43,
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WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
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WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
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WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
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/* 802.11e */
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WLAN_STATUS_UNSPECIFIED_QOS = 32,
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WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
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WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
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WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
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WLAN_STATUS_REQUEST_DECLINED = 37,
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WLAN_STATUS_INVALID_QOS_PARAM = 38,
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WLAN_STATUS_CHANGE_TSPEC = 39,
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WLAN_STATUS_WAIT_TS_DELAY = 47,
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WLAN_STATUS_NO_DIRECT_LINK = 48,
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WLAN_STATUS_STA_NOT_PRESENT = 49,
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WLAN_STATUS_STA_NOT_QSTA = 50,
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};
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/* Reason codes */
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enum ieee80211_reasoncode {
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WLAN_REASON_UNSPECIFIED = 1,
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WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
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WLAN_REASON_DEAUTH_LEAVING = 3,
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WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
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WLAN_REASON_DISASSOC_AP_BUSY = 5,
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WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
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WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
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WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
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WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
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/* 802.11h */
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WLAN_REASON_DISASSOC_BAD_POWER = 10,
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WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
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/* 802.11i */
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WLAN_REASON_INVALID_IE = 13,
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WLAN_REASON_MIC_FAILURE = 14,
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WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
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WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
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WLAN_REASON_IE_DIFFERENT = 17,
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WLAN_REASON_INVALID_GROUP_CIPHER = 18,
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WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
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WLAN_REASON_INVALID_AKMP = 20,
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WLAN_REASON_UNSUPP_RSN_VERSION = 21,
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WLAN_REASON_INVALID_RSN_IE_CAP = 22,
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WLAN_REASON_IEEE8021X_FAILED = 23,
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WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
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/* 802.11e */
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WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
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WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
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WLAN_REASON_DISASSOC_LOW_ACK = 34,
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WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
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WLAN_REASON_QSTA_LEAVE_QBSS = 36,
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WLAN_REASON_QSTA_NOT_USE = 37,
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WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
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WLAN_REASON_QSTA_TIMEOUT = 39,
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WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
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};
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/* Information Element IDs */
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enum ieee80211_eid {
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WLAN_EID_SSID = 0,
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WLAN_EID_SUPP_RATES = 1,
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WLAN_EID_FH_PARAMS = 2,
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WLAN_EID_DS_PARAMS = 3,
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WLAN_EID_CF_PARAMS = 4,
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WLAN_EID_TIM = 5,
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WLAN_EID_IBSS_PARAMS = 6,
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WLAN_EID_CHALLENGE = 16,
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/* 802.11d */
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WLAN_EID_COUNTRY = 7,
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WLAN_EID_HP_PARAMS = 8,
|
|
WLAN_EID_HP_TABLE = 9,
|
|
WLAN_EID_REQUEST = 10,
|
|
/* 802.11e */
|
|
WLAN_EID_QBSS_LOAD = 11,
|
|
WLAN_EID_EDCA_PARAM_SET = 12,
|
|
WLAN_EID_TSPEC = 13,
|
|
WLAN_EID_TCLAS = 14,
|
|
WLAN_EID_SCHEDULE = 15,
|
|
WLAN_EID_TS_DELAY = 43,
|
|
WLAN_EID_TCLAS_PROCESSING = 44,
|
|
WLAN_EID_QOS_CAPA = 46,
|
|
/* 802.11s */
|
|
WLAN_EID_MESH_CONFIG = 36, /* Pending IEEE 802.11 ANA approval */
|
|
WLAN_EID_MESH_ID = 37, /* Pending IEEE 802.11 ANA approval */
|
|
WLAN_EID_PEER_LINK = 40, /* Pending IEEE 802.11 ANA approval */
|
|
WLAN_EID_PREQ = 53, /* Pending IEEE 802.11 ANA approval */
|
|
WLAN_EID_PREP = 54, /* Pending IEEE 802.11 ANA approval */
|
|
WLAN_EID_PERR = 55, /* Pending IEEE 802.11 ANA approval */
|
|
/* 802.11h */
|
|
WLAN_EID_PWR_CONSTRAINT = 32,
|
|
WLAN_EID_PWR_CAPABILITY = 33,
|
|
WLAN_EID_TPC_REQUEST = 34,
|
|
WLAN_EID_TPC_REPORT = 35,
|
|
WLAN_EID_SUPPORTED_CHANNELS = 36,
|
|
WLAN_EID_CHANNEL_SWITCH = 37,
|
|
WLAN_EID_MEASURE_REQUEST = 38,
|
|
WLAN_EID_MEASURE_REPORT = 39,
|
|
WLAN_EID_QUIET = 40,
|
|
WLAN_EID_IBSS_DFS = 41,
|
|
/* 802.11g */
|
|
WLAN_EID_ERP_INFO = 42,
|
|
WLAN_EID_EXT_SUPP_RATES = 50,
|
|
/* 802.11n */
|
|
WLAN_EID_HT_CAPABILITY = 45,
|
|
WLAN_EID_HT_EXTRA_INFO = 61,
|
|
/* 802.11i */
|
|
WLAN_EID_RSN = 48,
|
|
WLAN_EID_WPA = 221,
|
|
WLAN_EID_GENERIC = 221,
|
|
WLAN_EID_VENDOR_SPECIFIC = 221,
|
|
WLAN_EID_QOS_PARAMETER = 222
|
|
};
|
|
|
|
/* Action category code */
|
|
enum ieee80211_category {
|
|
WLAN_CATEGORY_SPECTRUM_MGMT = 0,
|
|
WLAN_CATEGORY_QOS = 1,
|
|
WLAN_CATEGORY_DLS = 2,
|
|
WLAN_CATEGORY_BACK = 3,
|
|
WLAN_CATEGORY_WMM = 17,
|
|
};
|
|
|
|
/* BACK action code */
|
|
enum ieee80211_back_actioncode {
|
|
WLAN_ACTION_ADDBA_REQ = 0,
|
|
WLAN_ACTION_ADDBA_RESP = 1,
|
|
WLAN_ACTION_DELBA = 2,
|
|
};
|
|
|
|
/* BACK (block-ack) parties */
|
|
enum ieee80211_back_parties {
|
|
WLAN_BACK_RECIPIENT = 0,
|
|
WLAN_BACK_INITIATOR = 1,
|
|
WLAN_BACK_TIMER = 2,
|
|
};
|
|
|
|
/* A-MSDU 802.11n */
|
|
#define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080
|
|
|
|
/* cipher suite selectors */
|
|
#define WLAN_CIPHER_SUITE_USE_GROUP 0x000FAC00
|
|
#define WLAN_CIPHER_SUITE_WEP40 0x000FAC01
|
|
#define WLAN_CIPHER_SUITE_TKIP 0x000FAC02
|
|
/* reserved: 0x000FAC03 */
|
|
#define WLAN_CIPHER_SUITE_CCMP 0x000FAC04
|
|
#define WLAN_CIPHER_SUITE_WEP104 0x000FAC05
|
|
|
|
#define WLAN_MAX_KEY_LEN 32
|
|
|
|
/**
|
|
* ieee80211_get_SA - get pointer to SA
|
|
*
|
|
* Given an 802.11 frame, this function returns the offset
|
|
* to the source address (SA). It does not verify that the
|
|
* header is long enough to contain the address, and the
|
|
* header must be long enough to contain the frame control
|
|
* field.
|
|
*
|
|
* @hdr: the frame
|
|
*/
|
|
static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
|
|
{
|
|
u8 *raw = (u8 *) hdr;
|
|
u8 tofrom = (*(raw+1)) & 3; /* get the TODS and FROMDS bits */
|
|
|
|
switch (tofrom) {
|
|
case 2:
|
|
return hdr->addr3;
|
|
case 3:
|
|
return hdr->addr4;
|
|
}
|
|
return hdr->addr2;
|
|
}
|
|
|
|
/**
|
|
* ieee80211_get_DA - get pointer to DA
|
|
*
|
|
* Given an 802.11 frame, this function returns the offset
|
|
* to the destination address (DA). It does not verify that
|
|
* the header is long enough to contain the address, and the
|
|
* header must be long enough to contain the frame control
|
|
* field.
|
|
*
|
|
* @hdr: the frame
|
|
*/
|
|
static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
|
|
{
|
|
u8 *raw = (u8 *) hdr;
|
|
u8 to_ds = (*(raw+1)) & 1; /* get the TODS bit */
|
|
|
|
if (to_ds)
|
|
return hdr->addr3;
|
|
return hdr->addr1;
|
|
}
|
|
|
|
/**
|
|
* ieee80211_get_morefrag - determine whether the MOREFRAGS bit is set
|
|
*
|
|
* This function determines whether the "more fragments" bit is set
|
|
* in the frame.
|
|
*
|
|
* @hdr: the frame
|
|
*/
|
|
static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr)
|
|
{
|
|
return (le16_to_cpu(hdr->frame_control) &
|
|
IEEE80211_FCTL_MOREFRAGS) != 0;
|
|
}
|
|
|
|
#endif /* IEEE80211_H */
|