diff options
Diffstat (limited to 'drivers/staging/wlan-ng/p80211hdr.h')
| -rw-r--r-- | drivers/staging/wlan-ng/p80211hdr.h | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/drivers/staging/wlan-ng/p80211hdr.h b/drivers/staging/wlan-ng/p80211hdr.h new file mode 100644 index 000000000..93195a4c5 --- /dev/null +++ b/drivers/staging/wlan-ng/p80211hdr.h @@ -0,0 +1,210 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) */ +/* + * + * Macros, types, and functions for handling 802.11 MAC headers + * + * Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved. + * -------------------------------------------------------------------- + * + * linux-wlan + * + * The contents of this file are subject to the Mozilla Public + * License Version 1.1 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS + * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or + * implied. See the License for the specific language governing + * rights and limitations under the License. + * + * Alternatively, the contents of this file may be used under the + * terms of the GNU Public License version 2 (the "GPL"), in which + * case the provisions of the GPL are applicable instead of the + * above. If you wish to allow the use of your version of this file + * only under the terms of the GPL and not to allow others to use + * your version of this file under the MPL, indicate your decision + * by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL. If you do not delete + * the provisions above, a recipient may use your version of this + * file under either the MPL or the GPL. + * + * -------------------------------------------------------------------- + * + * Inquiries regarding the linux-wlan Open Source project can be + * made directly to: + * + * AbsoluteValue Systems Inc. + * info@linux-wlan.com + * http://www.linux-wlan.com + * + * -------------------------------------------------------------------- + * + * Portions of the development of this software were funded by + * Intersil Corporation as part of PRISM(R) chipset product development. + * + * -------------------------------------------------------------------- + * + * This file declares the constants and types used in the interface + * between a wlan driver and the user mode utilities. + * + * Note: + * - Constant values are always in HOST byte order. To assign + * values to multi-byte fields they _must_ be converted to + * ieee byte order. To retrieve multi-byte values from incoming + * frames, they must be converted to host order. + * + * All functions declared here are implemented in p80211.c + * -------------------------------------------------------------------- + */ + +#ifndef _P80211HDR_H +#define _P80211HDR_H + +#include <linux/if_ether.h> + +/*--- Sizes -----------------------------------------------*/ +#define WLAN_CRC_LEN 4 +#define WLAN_BSSID_LEN 6 +#define WLAN_HDR_A3_LEN 24 +#define WLAN_HDR_A4_LEN 30 +#define WLAN_SSID_MAXLEN 32 +#define WLAN_DATA_MAXLEN 2312 +#define WLAN_WEP_IV_LEN 4 +#define WLAN_WEP_ICV_LEN 4 + +/*--- Frame Control Field -------------------------------------*/ +/* Frame Types */ +#define WLAN_FTYPE_MGMT 0x00 +#define WLAN_FTYPE_CTL 0x01 +#define WLAN_FTYPE_DATA 0x02 + +/* Frame subtypes */ +/* Management */ +#define WLAN_FSTYPE_ASSOCREQ 0x00 +#define WLAN_FSTYPE_ASSOCRESP 0x01 +#define WLAN_FSTYPE_REASSOCREQ 0x02 +#define WLAN_FSTYPE_REASSOCRESP 0x03 +#define WLAN_FSTYPE_PROBEREQ 0x04 +#define WLAN_FSTYPE_PROBERESP 0x05 +#define WLAN_FSTYPE_BEACON 0x08 +#define WLAN_FSTYPE_ATIM 0x09 +#define WLAN_FSTYPE_DISASSOC 0x0a +#define WLAN_FSTYPE_AUTHEN 0x0b +#define WLAN_FSTYPE_DEAUTHEN 0x0c + +/* Control */ +#define WLAN_FSTYPE_BLOCKACKREQ 0x8 +#define WLAN_FSTYPE_BLOCKACK 0x9 +#define WLAN_FSTYPE_PSPOLL 0x0a +#define WLAN_FSTYPE_RTS 0x0b +#define WLAN_FSTYPE_CTS 0x0c +#define WLAN_FSTYPE_ACK 0x0d +#define WLAN_FSTYPE_CFEND 0x0e +#define WLAN_FSTYPE_CFENDCFACK 0x0f + +/* Data */ +#define WLAN_FSTYPE_DATAONLY 0x00 +#define WLAN_FSTYPE_DATA_CFACK 0x01 +#define WLAN_FSTYPE_DATA_CFPOLL 0x02 +#define WLAN_FSTYPE_DATA_CFACK_CFPOLL 0x03 +#define WLAN_FSTYPE_NULL 0x04 +#define WLAN_FSTYPE_CFACK 0x05 +#define WLAN_FSTYPE_CFPOLL 0x06 +#define WLAN_FSTYPE_CFACK_CFPOLL 0x07 + +/*--- FC Macros ----------------------------------------------*/ +/* Macros to get/set the bitfields of the Frame Control Field */ +/* GET_FC_??? - takes the host byte-order value of an FC */ +/* and retrieves the value of one of the */ +/* bitfields and moves that value so its lsb is */ +/* in bit 0. */ +/* SET_FC_??? - takes a host order value for one of the FC */ +/* bitfields and moves it to the proper bit */ +/* location for ORing into a host order FC. */ +/* To send the FC produced from SET_FC_???, */ +/* one must put the bytes in IEEE order. */ +/* e.g. */ +/* printf("the frame subtype is %x", */ +/* GET_FC_FTYPE( ieee2host( rx.fc ))) */ +/* */ +/* tx.fc = host2ieee( SET_FC_FTYPE(WLAN_FTYP_CTL) | */ +/* SET_FC_FSTYPE(WLAN_FSTYPE_RTS) ); */ +/*------------------------------------------------------------*/ + +#define WLAN_GET_FC_FTYPE(n) ((((u16)(n)) & GENMASK(3, 2)) >> 2) +#define WLAN_GET_FC_FSTYPE(n) ((((u16)(n)) & GENMASK(7, 4)) >> 4) +#define WLAN_GET_FC_TODS(n) ((((u16)(n)) & (BIT(8))) >> 8) +#define WLAN_GET_FC_FROMDS(n) ((((u16)(n)) & (BIT(9))) >> 9) +#define WLAN_GET_FC_ISWEP(n) ((((u16)(n)) & (BIT(14))) >> 14) + +#define WLAN_SET_FC_FTYPE(n) (((u16)(n)) << 2) +#define WLAN_SET_FC_FSTYPE(n) (((u16)(n)) << 4) +#define WLAN_SET_FC_TODS(n) (((u16)(n)) << 8) +#define WLAN_SET_FC_FROMDS(n) (((u16)(n)) << 9) +#define WLAN_SET_FC_ISWEP(n) (((u16)(n)) << 14) + +#define DOT11_RATE5_ISBASIC_GET(r) (((u8)(r)) & BIT(7)) + +/* Generic 802.11 Header types */ + +struct p80211_hdr { + __le16 frame_control; + u16 duration_id; + u8 address1[ETH_ALEN]; + u8 address2[ETH_ALEN]; + u8 address3[ETH_ALEN]; + u16 sequence_control; + u8 address4[ETH_ALEN]; +} __packed; + +/* Frame and header length macros */ + +static inline u16 wlan_ctl_framelen(u16 fstype) +{ + switch (fstype) { + case WLAN_FSTYPE_BLOCKACKREQ: + return 24; + case WLAN_FSTYPE_BLOCKACK: + return 152; + case WLAN_FSTYPE_PSPOLL: + case WLAN_FSTYPE_RTS: + case WLAN_FSTYPE_CFEND: + case WLAN_FSTYPE_CFENDCFACK: + return 20; + case WLAN_FSTYPE_CTS: + case WLAN_FSTYPE_ACK: + return 14; + default: + return 4; + } +} + +#define WLAN_FCS_LEN 4 + +/* ftcl in HOST order */ +static inline u16 p80211_headerlen(u16 fctl) +{ + u16 hdrlen = 0; + + switch (WLAN_GET_FC_FTYPE(fctl)) { + case WLAN_FTYPE_MGMT: + hdrlen = WLAN_HDR_A3_LEN; + break; + case WLAN_FTYPE_DATA: + hdrlen = WLAN_HDR_A3_LEN; + if (WLAN_GET_FC_TODS(fctl) && WLAN_GET_FC_FROMDS(fctl)) + hdrlen += ETH_ALEN; + break; + case WLAN_FTYPE_CTL: + hdrlen = wlan_ctl_framelen(WLAN_GET_FC_FSTYPE(fctl)) - + WLAN_FCS_LEN; + break; + default: + hdrlen = WLAN_HDR_A3_LEN; + } + + return hdrlen; +} + +#endif /* _P80211HDR_H */ |