edcdf8b21a
This patch follows the 11n spec in separation between Tx and Rx MCS capabilities. Up until now, when configuring the HT possible set of Tx MCS only Rx MCS were considered, assuming they are the same as the Tx MCS. This patch fixed this by looking at low level driver Tx capabilities. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
615 lines
17 KiB
C
615 lines
17 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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__le32 seqnum;
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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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/* 802.11n HT capability AMPDU settings */
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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 capability MSC set */
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#define IEEE80211_SUPP_MCS_SET_UEQM 4
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#define IEEE80211_HT_CAP_MAX_STREAMS 4
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#define IEEE80211_SUPP_MCS_SET_LEN 10
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/* maximum streams the spec allows */
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#define IEEE80211_HT_CAP_MCS_TX_DEFINED 0x01
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#define IEEE80211_HT_CAP_MCS_TX_RX_DIFF 0x02
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#define IEEE80211_HT_CAP_MCS_TX_STREAMS 0x0C
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#define IEEE80211_HT_CAP_MCS_TX_UEQM 0x10
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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,
|
|
WLAN_REASON_QSTA_NOT_USE = 37,
|
|
WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
|
|
WLAN_REASON_QSTA_TIMEOUT = 39,
|
|
WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
|
|
};
|
|
|
|
|
|
/* Information Element IDs */
|
|
enum ieee80211_eid {
|
|
WLAN_EID_SSID = 0,
|
|
WLAN_EID_SUPP_RATES = 1,
|
|
WLAN_EID_FH_PARAMS = 2,
|
|
WLAN_EID_DS_PARAMS = 3,
|
|
WLAN_EID_CF_PARAMS = 4,
|
|
WLAN_EID_TIM = 5,
|
|
WLAN_EID_IBSS_PARAMS = 6,
|
|
WLAN_EID_CHALLENGE = 16,
|
|
/* 802.11d */
|
|
WLAN_EID_COUNTRY = 7,
|
|
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
|
|
*
|
|
* All mesh EID numbers are pending IEEE 802.11 ANA approval.
|
|
* The numbers have been incremented from those suggested in
|
|
* 802.11s/D2.0 so that MESH_CONFIG does not conflict with
|
|
* EXT_SUPP_RATES.
|
|
*/
|
|
WLAN_EID_MESH_CONFIG = 51,
|
|
WLAN_EID_MESH_ID = 52,
|
|
WLAN_EID_PEER_LINK = 55,
|
|
WLAN_EID_PREQ = 68,
|
|
WLAN_EID_PREP = 69,
|
|
WLAN_EID_PERR = 70,
|
|
/* 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)
|
|
{
|
|
__le16 fc = hdr->frame_control;
|
|
fc &= cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
|
|
|
|
switch (fc) {
|
|
case __constant_cpu_to_le16(IEEE80211_FCTL_FROMDS):
|
|
return hdr->addr3;
|
|
case __constant_cpu_to_le16(IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS):
|
|
return hdr->addr4;
|
|
default:
|
|
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)
|
|
{
|
|
__le16 fc = hdr->frame_control;
|
|
fc &= cpu_to_le16(IEEE80211_FCTL_TODS);
|
|
|
|
if (fc)
|
|
return hdr->addr3;
|
|
else
|
|
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)
|
|
{
|
|
__le16 fc = hdr->frame_control;
|
|
return !!(fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS));
|
|
}
|
|
|
|
#endif /* IEEE80211_H */
|