cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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p80211hdr.h (7011B)


      1/* SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) */
      2/*
      3 *
      4 * Macros, types, and functions for handling 802.11 MAC headers
      5 *
      6 * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
      7 * --------------------------------------------------------------------
      8 *
      9 * linux-wlan
     10 *
     11 *   The contents of this file are subject to the Mozilla Public
     12 *   License Version 1.1 (the "License"); you may not use this file
     13 *   except in compliance with the License. You may obtain a copy of
     14 *   the License at http://www.mozilla.org/MPL/
     15 *
     16 *   Software distributed under the License is distributed on an "AS
     17 *   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
     18 *   implied. See the License for the specific language governing
     19 *   rights and limitations under the License.
     20 *
     21 *   Alternatively, the contents of this file may be used under the
     22 *   terms of the GNU Public License version 2 (the "GPL"), in which
     23 *   case the provisions of the GPL are applicable instead of the
     24 *   above.  If you wish to allow the use of your version of this file
     25 *   only under the terms of the GPL and not to allow others to use
     26 *   your version of this file under the MPL, indicate your decision
     27 *   by deleting the provisions above and replace them with the notice
     28 *   and other provisions required by the GPL.  If you do not delete
     29 *   the provisions above, a recipient may use your version of this
     30 *   file under either the MPL or the GPL.
     31 *
     32 * --------------------------------------------------------------------
     33 *
     34 * Inquiries regarding the linux-wlan Open Source project can be
     35 * made directly to:
     36 *
     37 * AbsoluteValue Systems Inc.
     38 * info@linux-wlan.com
     39 * http://www.linux-wlan.com
     40 *
     41 * --------------------------------------------------------------------
     42 *
     43 * Portions of the development of this software were funded by
     44 * Intersil Corporation as part of PRISM(R) chipset product development.
     45 *
     46 * --------------------------------------------------------------------
     47 *
     48 * This file declares the constants and types used in the interface
     49 * between a wlan driver and the user mode utilities.
     50 *
     51 * Note:
     52 *  - Constant values are always in HOST byte order.  To assign
     53 *    values to multi-byte fields they _must_ be converted to
     54 *    ieee byte order.  To retrieve multi-byte values from incoming
     55 *    frames, they must be converted to host order.
     56 *
     57 * All functions declared here are implemented in p80211.c
     58 * --------------------------------------------------------------------
     59 */
     60
     61#ifndef _P80211HDR_H
     62#define _P80211HDR_H
     63
     64#include <linux/if_ether.h>
     65
     66/*--- Sizes -----------------------------------------------*/
     67#define WLAN_CRC_LEN			4
     68#define WLAN_BSSID_LEN			6
     69#define WLAN_HDR_A3_LEN			24
     70#define WLAN_HDR_A4_LEN			30
     71#define WLAN_SSID_MAXLEN		32
     72#define WLAN_DATA_MAXLEN		2312
     73#define WLAN_WEP_IV_LEN			4
     74#define WLAN_WEP_ICV_LEN		4
     75
     76/*--- Frame Control Field -------------------------------------*/
     77/* Frame Types */
     78#define WLAN_FTYPE_MGMT			0x00
     79#define WLAN_FTYPE_CTL			0x01
     80#define WLAN_FTYPE_DATA			0x02
     81
     82/* Frame subtypes */
     83/* Management */
     84#define WLAN_FSTYPE_ASSOCREQ		0x00
     85#define WLAN_FSTYPE_ASSOCRESP		0x01
     86#define WLAN_FSTYPE_REASSOCREQ		0x02
     87#define WLAN_FSTYPE_REASSOCRESP		0x03
     88#define WLAN_FSTYPE_PROBEREQ		0x04
     89#define WLAN_FSTYPE_PROBERESP		0x05
     90#define WLAN_FSTYPE_BEACON		0x08
     91#define WLAN_FSTYPE_ATIM		0x09
     92#define WLAN_FSTYPE_DISASSOC		0x0a
     93#define WLAN_FSTYPE_AUTHEN		0x0b
     94#define WLAN_FSTYPE_DEAUTHEN		0x0c
     95
     96/* Control */
     97#define WLAN_FSTYPE_BLOCKACKREQ		0x8
     98#define WLAN_FSTYPE_BLOCKACK		0x9
     99#define WLAN_FSTYPE_PSPOLL		0x0a
    100#define WLAN_FSTYPE_RTS			0x0b
    101#define WLAN_FSTYPE_CTS			0x0c
    102#define WLAN_FSTYPE_ACK			0x0d
    103#define WLAN_FSTYPE_CFEND		0x0e
    104#define WLAN_FSTYPE_CFENDCFACK		0x0f
    105
    106/* Data */
    107#define WLAN_FSTYPE_DATAONLY		0x00
    108#define WLAN_FSTYPE_DATA_CFACK		0x01
    109#define WLAN_FSTYPE_DATA_CFPOLL		0x02
    110#define WLAN_FSTYPE_DATA_CFACK_CFPOLL	0x03
    111#define WLAN_FSTYPE_NULL		0x04
    112#define WLAN_FSTYPE_CFACK		0x05
    113#define WLAN_FSTYPE_CFPOLL		0x06
    114#define WLAN_FSTYPE_CFACK_CFPOLL	0x07
    115
    116/*--- FC Macros ----------------------------------------------*/
    117/* Macros to get/set the bitfields of the Frame Control Field */
    118/*  GET_FC_??? - takes the host byte-order value of an FC     */
    119/*               and retrieves the value of one of the        */
    120/*               bitfields and moves that value so its lsb is */
    121/*               in bit 0.                                    */
    122/*  SET_FC_??? - takes a host order value for one of the FC   */
    123/*               bitfields and moves it to the proper bit     */
    124/*               location for ORing into a host order FC.     */
    125/*               To send the FC produced from SET_FC_???,     */
    126/*               one must put the bytes in IEEE order.        */
    127/*  e.g.                                                      */
    128/*     printf("the frame subtype is %x",                      */
    129/*                 GET_FC_FTYPE( ieee2host( rx.fc )))         */
    130/*                                                            */
    131/*     tx.fc = host2ieee( SET_FC_FTYPE(WLAN_FTYP_CTL) |       */
    132/*                        SET_FC_FSTYPE(WLAN_FSTYPE_RTS) );   */
    133/*------------------------------------------------------------*/
    134
    135#define WLAN_GET_FC_FTYPE(n)	((((u16)(n)) & GENMASK(3, 2)) >> 2)
    136#define WLAN_GET_FC_FSTYPE(n)	((((u16)(n)) & GENMASK(7, 4)) >> 4)
    137#define WLAN_GET_FC_TODS(n)	((((u16)(n)) & (BIT(8))) >> 8)
    138#define WLAN_GET_FC_FROMDS(n)	((((u16)(n)) & (BIT(9))) >> 9)
    139#define WLAN_GET_FC_ISWEP(n)	((((u16)(n)) & (BIT(14))) >> 14)
    140
    141#define WLAN_SET_FC_FTYPE(n)	(((u16)(n)) << 2)
    142#define WLAN_SET_FC_FSTYPE(n)	(((u16)(n)) << 4)
    143#define WLAN_SET_FC_TODS(n)	(((u16)(n)) << 8)
    144#define WLAN_SET_FC_FROMDS(n)	(((u16)(n)) << 9)
    145#define WLAN_SET_FC_ISWEP(n)	(((u16)(n)) << 14)
    146
    147#define DOT11_RATE5_ISBASIC_GET(r)     (((u8)(r)) & BIT(7))
    148
    149/* Generic 802.11 Header types */
    150
    151struct p80211_hdr {
    152	__le16	frame_control;
    153	u16	duration_id;
    154	u8	address1[ETH_ALEN];
    155	u8	address2[ETH_ALEN];
    156	u8	address3[ETH_ALEN];
    157	u16	sequence_control;
    158	u8	address4[ETH_ALEN];
    159} __packed;
    160
    161/* Frame and header length macros */
    162
    163static inline u16 wlan_ctl_framelen(u16 fstype)
    164{
    165	switch (fstype)	{
    166	case WLAN_FSTYPE_BLOCKACKREQ:
    167		return 24;
    168	case WLAN_FSTYPE_BLOCKACK:
    169		return 152;
    170	case WLAN_FSTYPE_PSPOLL:
    171	case WLAN_FSTYPE_RTS:
    172	case WLAN_FSTYPE_CFEND:
    173	case WLAN_FSTYPE_CFENDCFACK:
    174		return 20;
    175	case WLAN_FSTYPE_CTS:
    176	case WLAN_FSTYPE_ACK:
    177		return 14;
    178	default:
    179		return 4;
    180	}
    181}
    182
    183#define WLAN_FCS_LEN			4
    184
    185/* ftcl in HOST order */
    186static inline u16 p80211_headerlen(u16 fctl)
    187{
    188	u16 hdrlen = 0;
    189
    190	switch (WLAN_GET_FC_FTYPE(fctl)) {
    191	case WLAN_FTYPE_MGMT:
    192		hdrlen = WLAN_HDR_A3_LEN;
    193		break;
    194	case WLAN_FTYPE_DATA:
    195		hdrlen = WLAN_HDR_A3_LEN;
    196		if (WLAN_GET_FC_TODS(fctl) && WLAN_GET_FC_FROMDS(fctl))
    197			hdrlen += ETH_ALEN;
    198		break;
    199	case WLAN_FTYPE_CTL:
    200		hdrlen = wlan_ctl_framelen(WLAN_GET_FC_FSTYPE(fctl)) -
    201		    WLAN_FCS_LEN;
    202		break;
    203	default:
    204		hdrlen = WLAN_HDR_A3_LEN;
    205	}
    206
    207	return hdrlen;
    208}
    209
    210#endif /* _P80211HDR_H */