| /* p80211hdr.h |
| * |
| * 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 |
| |
| /*================================================================*/ |
| /* System Includes */ |
| |
| /*================================================================*/ |
| /* Project Includes */ |
| |
| #ifndef _WLAN_COMPAT_H |
| #include "wlan_compat.h" |
| #endif |
| |
| |
| /*================================================================*/ |
| /* Constants */ |
| |
| /*--- Sizes -----------------------------------------------*/ |
| #define WLAN_ADDR_LEN 6 |
| #define WLAN_CRC_LEN 4 |
| #define WLAN_BSSID_LEN 6 |
| #define WLAN_BSS_TS_LEN 8 |
| #define WLAN_HDR_A3_LEN 24 |
| #define WLAN_HDR_A4_LEN 30 |
| #define WLAN_SSID_MAXLEN 32 |
| #define WLAN_DATA_MAXLEN 2312 |
| #define WLAN_A3FR_MAXLEN (WLAN_HDR_A3_LEN + WLAN_DATA_MAXLEN + WLAN_CRC_LEN) |
| #define WLAN_A4FR_MAXLEN (WLAN_HDR_A4_LEN + WLAN_DATA_MAXLEN + WLAN_CRC_LEN) |
| #define WLAN_BEACON_FR_MAXLEN (WLAN_HDR_A3_LEN + 334) |
| #define WLAN_ATIM_FR_MAXLEN (WLAN_HDR_A3_LEN + 0) |
| #define WLAN_DISASSOC_FR_MAXLEN (WLAN_HDR_A3_LEN + 2) |
| #define WLAN_ASSOCREQ_FR_MAXLEN (WLAN_HDR_A3_LEN + 48) |
| #define WLAN_ASSOCRESP_FR_MAXLEN (WLAN_HDR_A3_LEN + 16) |
| #define WLAN_REASSOCREQ_FR_MAXLEN (WLAN_HDR_A3_LEN + 54) |
| #define WLAN_REASSOCRESP_FR_MAXLEN (WLAN_HDR_A3_LEN + 16) |
| #define WLAN_PROBEREQ_FR_MAXLEN (WLAN_HDR_A3_LEN + 44) |
| #define WLAN_PROBERESP_FR_MAXLEN (WLAN_HDR_A3_LEN + 78) |
| #define WLAN_AUTHEN_FR_MAXLEN (WLAN_HDR_A3_LEN + 261) |
| #define WLAN_DEAUTHEN_FR_MAXLEN (WLAN_HDR_A3_LEN + 2) |
| #define WLAN_WEP_NKEYS 4 |
| #define WLAN_WEP_MAXKEYLEN 13 |
| #define WLAN_CHALLENGE_IE_LEN 130 |
| #define WLAN_CHALLENGE_LEN 128 |
| #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 |
| |
| |
| /*================================================================*/ |
| /* Macros */ |
| |
| /*--- 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_PVER(n) (((UINT16)(n)) & (BIT0 | BIT1)) |
| #define WLAN_GET_FC_FTYPE(n) ((((UINT16)(n)) & (BIT2 | BIT3)) >> 2) |
| #define WLAN_GET_FC_FSTYPE(n) ((((UINT16)(n)) & (BIT4|BIT5|BIT6|BIT7)) >> 4) |
| #define WLAN_GET_FC_TODS(n) ((((UINT16)(n)) & (BIT8)) >> 8) |
| #define WLAN_GET_FC_FROMDS(n) ((((UINT16)(n)) & (BIT9)) >> 9) |
| #define WLAN_GET_FC_MOREFRAG(n) ((((UINT16)(n)) & (BIT10)) >> 10) |
| #define WLAN_GET_FC_RETRY(n) ((((UINT16)(n)) & (BIT11)) >> 11) |
| #define WLAN_GET_FC_PWRMGT(n) ((((UINT16)(n)) & (BIT12)) >> 12) |
| #define WLAN_GET_FC_MOREDATA(n) ((((UINT16)(n)) & (BIT13)) >> 13) |
| #define WLAN_GET_FC_ISWEP(n) ((((UINT16)(n)) & (BIT14)) >> 14) |
| #define WLAN_GET_FC_ORDER(n) ((((UINT16)(n)) & (BIT15)) >> 15) |
| |
| #define WLAN_SET_FC_PVER(n) ((UINT16)(n)) |
| #define WLAN_SET_FC_FTYPE(n) (((UINT16)(n)) << 2) |
| #define WLAN_SET_FC_FSTYPE(n) (((UINT16)(n)) << 4) |
| #define WLAN_SET_FC_TODS(n) (((UINT16)(n)) << 8) |
| #define WLAN_SET_FC_FROMDS(n) (((UINT16)(n)) << 9) |
| #define WLAN_SET_FC_MOREFRAG(n) (((UINT16)(n)) << 10) |
| #define WLAN_SET_FC_RETRY(n) (((UINT16)(n)) << 11) |
| #define WLAN_SET_FC_PWRMGT(n) (((UINT16)(n)) << 12) |
| #define WLAN_SET_FC_MOREDATA(n) (((UINT16)(n)) << 13) |
| #define WLAN_SET_FC_ISWEP(n) (((UINT16)(n)) << 14) |
| #define WLAN_SET_FC_ORDER(n) (((UINT16)(n)) << 15) |
| |
| /*--- Duration Macros ----------------------------------------*/ |
| /* Macros to get/set the bitfields of the Duration Field */ |
| /* - the duration value is only valid when bit15 is zero */ |
| /* - the firmware handles these values, so I'm not going */ |
| /* these macros right now. */ |
| /*------------------------------------------------------------*/ |
| |
| /*--- Sequence Control Macros -------------------------------*/ |
| /* Macros to get/set the bitfields of the Sequence Control */ |
| /* Field. */ |
| /*------------------------------------------------------------*/ |
| #define WLAN_GET_SEQ_FRGNUM(n) (((UINT16)(n)) & (BIT0|BIT1|BIT2|BIT3)) |
| #define WLAN_GET_SEQ_SEQNUM(n) ((((UINT16)(n)) & (~(BIT0|BIT1|BIT2|BIT3))) >> 4) |
| |
| /*--- Data ptr macro -----------------------------------------*/ |
| /* Creates a UINT8* to the data portion of a frame */ |
| /* Assumes you're passing in a ptr to the beginning of the hdr*/ |
| /*------------------------------------------------------------*/ |
| #define WLAN_HDR_A3_DATAP(p) (((UINT8*)(p)) + WLAN_HDR_A3_LEN) |
| #define WLAN_HDR_A4_DATAP(p) (((UINT8*)(p)) + WLAN_HDR_A4_LEN) |
| |
| #define DOT11_RATE5_ISBASIC_GET(r) (((UINT8)(r)) & BIT7) |
| |
| /*================================================================*/ |
| /* Types */ |
| |
| /* BSS Timestamp */ |
| typedef UINT8 wlan_bss_ts_t[WLAN_BSS_TS_LEN]; |
| |
| /* Generic 802.11 Header types */ |
| |
| typedef struct p80211_hdr_a3 |
| { |
| UINT16 fc; |
| UINT16 dur; |
| UINT8 a1[WLAN_ADDR_LEN]; |
| UINT8 a2[WLAN_ADDR_LEN]; |
| UINT8 a3[WLAN_ADDR_LEN]; |
| UINT16 seq; |
| } __WLAN_ATTRIB_PACK__ p80211_hdr_a3_t; |
| |
| typedef struct p80211_hdr_a4 |
| { |
| UINT16 fc; |
| UINT16 dur; |
| UINT8 a1[WLAN_ADDR_LEN]; |
| UINT8 a2[WLAN_ADDR_LEN]; |
| UINT8 a3[WLAN_ADDR_LEN]; |
| UINT16 seq; |
| UINT8 a4[WLAN_ADDR_LEN]; |
| } __WLAN_ATTRIB_PACK__ p80211_hdr_a4_t; |
| |
| typedef union p80211_hdr |
| { |
| p80211_hdr_a3_t a3; |
| p80211_hdr_a4_t a4; |
| } __WLAN_ATTRIB_PACK__ p80211_hdr_t; |
| |
| |
| /*================================================================*/ |
| /* Extern Declarations */ |
| |
| |
| /*================================================================*/ |
| /* Function Declarations */ |
| |
| /* Frame and header lenght macros */ |
| |
| #define WLAN_CTL_FRAMELEN(fstype) (\ |
| (fstype) == WLAN_FSTYPE_BLOCKACKREQ ? 24 : \ |
| (fstype) == WLAN_FSTYPE_BLOCKACK ? 152 : \ |
| (fstype) == WLAN_FSTYPE_PSPOLL ? 20 : \ |
| (fstype) == WLAN_FSTYPE_RTS ? 20 : \ |
| (fstype) == WLAN_FSTYPE_CTS ? 14 : \ |
| (fstype) == WLAN_FSTYPE_ACK ? 14 : \ |
| (fstype) == WLAN_FSTYPE_CFEND ? 20 : \ |
| (fstype) == WLAN_FSTYPE_CFENDCFACK ? 20 : 4) |
| |
| #define WLAN_FCS_LEN 4 |
| |
| /* ftcl in HOST order */ |
| inline static UINT16 p80211_headerlen(UINT16 fctl) |
| { |
| UINT16 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 += WLAN_ADDR_LEN; |
| } |
| 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 */ |
