include/net/ieee80211.h

   1 /*
   2  * Merged with mainline ieee80211.h in Aug 2004.  Original ieee802_11
   3  * remains copyright by the original authors
   4  *
   5  * Portions of the merged code are based on Host AP (software wireless
   6  * LAN access point) driver for Intersil Prism2/2.5/3.
   7  *
   8  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   9  * <jkmaline@cc.hut.fi>
  10  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
  11  *
  12  * Adaption to a generic IEEE 802.11 stack by James Ketrenos
  13  * <jketreno@linux.intel.com>
  14  * Copyright (c) 2004, Intel Corporation
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License version 2 as
  18  * published by the Free Software Foundation. See README and COPYING for
  19  * more details.
  20  */
  21 #ifndef IEEE80211_H
  22 #define IEEE80211_H
  23 #include <linux/if_ether.h>     /* ETH_ALEN */
  24 #include <linux/kernel.h>       /* ARRAY_SIZE */
  25 #include <linux/wireless.h>
  26
  27 #define IEEE80211_DATA_LEN              2304
  28 /* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
  29    6.2.1.1.2.
  30
  31    The figure in section 7.1.2 suggests a body size of up to 2312
  32    bytes is allowed, which is a bit confusing, I suspect this
  33    represents the 2304 bytes of real data, plus a possible 8 bytes of
  34    WEP IV and ICV. (this interpretation suggested by Ramiro Barreiro) */
  35
  36 #define IEEE80211_HLEN                  30
  37 #define IEEE80211_FRAME_LEN             (IEEE80211_DATA_LEN + IEEE80211_HLEN)
  38
  39 struct ieee80211_hdr {
  40         __le16 frame_ctl;
  41         __le16 duration_id;
  42         u8 addr1[ETH_ALEN];
  43         u8 addr2[ETH_ALEN];
  44         u8 addr3[ETH_ALEN];
  45         __le16 seq_ctl;
  46         u8 addr4[ETH_ALEN];
  47 } __attribute__ ((packed));
  48
  49 struct ieee80211_hdr_3addr {
  50         __le16 frame_ctl;
  51         __le16 duration_id;
  52         u8 addr1[ETH_ALEN];
  53         u8 addr2[ETH_ALEN];
  54         u8 addr3[ETH_ALEN];
  55         __le16 seq_ctl;
  56 } __attribute__ ((packed));
  57
  58 #define IEEE80211_1ADDR_LEN 10
  59 #define IEEE80211_2ADDR_LEN 16
  60 #define IEEE80211_3ADDR_LEN 24
  61 #define IEEE80211_4ADDR_LEN 30
  62 #define IEEE80211_FCS_LEN    4
  63
  64 #define MIN_FRAG_THRESHOLD     256U
  65 #define MAX_FRAG_THRESHOLD     2346U
  66
  67 /* Frame control field constants */
  68 #define IEEE80211_FCTL_VERS             0x0003
  69 #define IEEE80211_FCTL_FTYPE            0x000c
  70 #define IEEE80211_FCTL_STYPE            0x00f0
  71 #define IEEE80211_FCTL_TODS             0x0100
  72 #define IEEE80211_FCTL_FROMDS           0x0200
  73 #define IEEE80211_FCTL_MOREFRAGS        0x0400
  74 #define IEEE80211_FCTL_RETRY            0x0800
  75 #define IEEE80211_FCTL_PM               0x1000
  76 #define IEEE80211_FCTL_MOREDATA         0x2000
  77 #define IEEE80211_FCTL_PROTECTED        0x4000
  78 #define IEEE80211_FCTL_ORDER            0x8000
  79
  80 #define IEEE80211_FTYPE_MGMT            0x0000
  81 #define IEEE80211_FTYPE_CTL             0x0004
  82 #define IEEE80211_FTYPE_DATA            0x0008
  83
  84 /* management */
  85 #define IEEE80211_STYPE_ASSOC_REQ       0x0000
  86 #define IEEE80211_STYPE_ASSOC_RESP      0x0010
  87 #define IEEE80211_STYPE_REASSOC_REQ     0x0020
  88 #define IEEE80211_STYPE_REASSOC_RESP    0x0030
  89 #define IEEE80211_STYPE_PROBE_REQ       0x0040
  90 #define IEEE80211_STYPE_PROBE_RESP      0x0050
  91 #define IEEE80211_STYPE_BEACON          0x0080
  92 #define IEEE80211_STYPE_ATIM            0x0090
  93 #define IEEE80211_STYPE_DISASSOC        0x00A0
  94 #define IEEE80211_STYPE_AUTH            0x00B0
  95 #define IEEE80211_STYPE_DEAUTH          0x00C0
  96 #define IEEE80211_STYPE_ACTION          0x00D0
  97
  98 /* control */
  99 #define IEEE80211_STYPE_PSPOLL          0x00A0
 100 #define IEEE80211_STYPE_RTS             0x00B0
 101 #define IEEE80211_STYPE_CTS             0x00C0
 102 #define IEEE80211_STYPE_ACK             0x00D0
 103 #define IEEE80211_STYPE_CFEND           0x00E0
 104 #define IEEE80211_STYPE_CFENDACK        0x00F0
 105
 106 /* data */
 107 #define IEEE80211_STYPE_DATA            0x0000
 108 #define IEEE80211_STYPE_DATA_CFACK      0x0010
 109 #define IEEE80211_STYPE_DATA_CFPOLL     0x0020
 110 #define IEEE80211_STYPE_DATA_CFACKPOLL  0x0030
 111 #define IEEE80211_STYPE_NULLFUNC        0x0040
 112 #define IEEE80211_STYPE_CFACK           0x0050
 113 #define IEEE80211_STYPE_CFPOLL          0x0060
 114 #define IEEE80211_STYPE_CFACKPOLL       0x0070
 115
 116 #define IEEE80211_SCTL_FRAG             0x000F
 117 #define IEEE80211_SCTL_SEQ              0xFFF0
 118
 119 /* debug macros */
 120
 121 #ifdef CONFIG_IEEE80211_DEBUG
 122 extern u32 ieee80211_debug_level;
 123 #define IEEE80211_DEBUG(level, fmt, args...) \
 124 do { if (ieee80211_debug_level & (level)) \
 125   printk(KERN_DEBUG "ieee80211: %c %s " fmt, \
 126          in_interrupt() ? 'I' : 'U', __FUNCTION__ , ## args); } while (0)
 127 #else
 128 #define IEEE80211_DEBUG(level, fmt, args...) do {} while (0)
 129 #endif                          /* CONFIG_IEEE80211_DEBUG */
 130
 131 /* debug macros not dependent on CONFIG_IEEE80211_DEBUG */
 132
 133 #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
 134 #define MAC_ARG(x) ((u8*)(x))[0],((u8*)(x))[1],((u8*)(x))[2],((u8*)(x))[3],((u8*)(x))[4],((u8*)(x))[5]
 135
 136 /* escape_essid() is intended to be used in debug (and possibly error)
 137  * messages. It should never be used for passing essid to user space. */
 138 const char *escape_essid(const char *essid, u8 essid_len);
 139
 140 /*
 141  * To use the debug system:
 142  *
 143  * If you are defining a new debug classification, simply add it to the #define
 144  * list here in the form of:
 145  *
 146  * #define IEEE80211_DL_xxxx VALUE
 147  *
 148  * shifting value to the left one bit from the previous entry.  xxxx should be
 149  * the name of the classification (for example, WEP)
 150  *
 151  * You then need to either add a IEEE80211_xxxx_DEBUG() macro definition for your
 152  * classification, or use IEEE80211_DEBUG(IEEE80211_DL_xxxx, ...) whenever you want
 153  * to send output to that classification.
 154  *
 155  * To add your debug level to the list of levels seen when you perform
 156  *
 157  * % cat /proc/net/ieee80211/debug_level
 158  *
 159  * you simply need to add your entry to the ieee80211_debug_level array.
 160  *
 161  * If you do not see debug_level in /proc/net/ieee80211 then you do not have
 162  * CONFIG_IEEE80211_DEBUG defined in your kernel configuration
 163  *
 164  */
 165
 166 #define IEEE80211_DL_INFO          (1<<0)
 167 #define IEEE80211_DL_WX            (1<<1)
 168 #define IEEE80211_DL_SCAN          (1<<2)
 169 #define IEEE80211_DL_STATE         (1<<3)
 170 #define IEEE80211_DL_MGMT          (1<<4)
 171 #define IEEE80211_DL_FRAG          (1<<5)
 172 #define IEEE80211_DL_DROP          (1<<7)
 173
 174 #define IEEE80211_DL_TX            (1<<8)
 175 #define IEEE80211_DL_RX            (1<<9)
 176
 177 #define IEEE80211_ERROR(f, a...) printk(KERN_ERR "ieee80211: " f, ## a)
 178 #define IEEE80211_WARNING(f, a...) printk(KERN_WARNING "ieee80211: " f, ## a)
 179 #define IEEE80211_DEBUG_INFO(f, a...)   IEEE80211_DEBUG(IEEE80211_DL_INFO, f, ## a)
 180
 181 #define IEEE80211_DEBUG_WX(f, a...)     IEEE80211_DEBUG(IEEE80211_DL_WX, f, ## a)
 182 #define IEEE80211_DEBUG_SCAN(f, a...)   IEEE80211_DEBUG(IEEE80211_DL_SCAN, f, ## a)
 183 #define IEEE80211_DEBUG_STATE(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_STATE, f, ## a)
 184 #define IEEE80211_DEBUG_MGMT(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_MGMT, f, ## a)
 185 #define IEEE80211_DEBUG_FRAG(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_FRAG, f, ## a)
 186 #define IEEE80211_DEBUG_DROP(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_DROP, f, ## a)
 187 #define IEEE80211_DEBUG_TX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_TX, f, ## a)
 188 #define IEEE80211_DEBUG_RX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_RX, f, ## a)
 189 #include <linux/netdevice.h>
 190 #include <linux/wireless.h>
 191 #include <linux/if_arp.h>       /* ARPHRD_ETHER */
 192
 193 #ifndef WIRELESS_SPY
 194 #define WIRELESS_SPY            /* enable iwspy support */
 195 #endif
 196 #include <net/iw_handler.h>     /* new driver API */
 197
 198 #ifndef ETH_P_PAE
 199 #define ETH_P_PAE 0x888E        /* Port Access Entity (IEEE 802.1X) */
 200 #endif                          /* ETH_P_PAE */
 201
 202 #define ETH_P_PREAUTH 0x88C7    /* IEEE 802.11i pre-authentication */
 203
 204 #ifndef ETH_P_80211_RAW
 205 #define ETH_P_80211_RAW (ETH_P_ECONET + 1)
 206 #endif
 207
 208 /* IEEE 802.11 defines */
 209
 210 #define P80211_OUI_LEN 3
 211
 212 struct ieee80211_snap_hdr {
 213
 214         u8 dsap;                /* always 0xAA */
 215         u8 ssap;                /* always 0xAA */
 216         u8 ctrl;                /* always 0x03 */
 217         u8 oui[P80211_OUI_LEN]; /* organizational universal id */
 218
 219 } __attribute__ ((packed));
 220
 221 #define SNAP_SIZE sizeof(struct ieee80211_snap_hdr)
 222
 223 #define WLAN_FC_GET_VERS(fc) ((fc) & IEEE80211_FCTL_VERS)
 224 #define WLAN_FC_GET_TYPE(fc) ((fc) & IEEE80211_FCTL_FTYPE)
 225 #define WLAN_FC_GET_STYPE(fc) ((fc) & IEEE80211_FCTL_STYPE)
 226
 227 #define WLAN_GET_SEQ_FRAG(seq) ((seq) & IEEE80211_SCTL_FRAG)
 228 #define WLAN_GET_SEQ_SEQ(seq)  ((seq) & IEEE80211_SCTL_SEQ)
 229
 230 /* Authentication algorithms */
 231 #define WLAN_AUTH_OPEN 0
 232 #define WLAN_AUTH_SHARED_KEY 1
 233
 234 #define WLAN_AUTH_CHALLENGE_LEN 128
 235
 236 #define WLAN_CAPABILITY_ESS (1<<0)
 237 #define WLAN_CAPABILITY_IBSS (1<<1)
 238 #define WLAN_CAPABILITY_CF_POLLABLE (1<<2)
 239 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
 240 #define WLAN_CAPABILITY_PRIVACY (1<<4)
 241 #define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
 242 #define WLAN_CAPABILITY_PBCC (1<<6)
 243 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
 244 #define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8)
 245 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
 246 #define WLAN_CAPABILITY_OSSS_OFDM (1<<13)
 247
 248 /* Status codes */
 249 enum ieee80211_statuscode {
 250         WLAN_STATUS_SUCCESS = 0,
 251         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
 252         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
 253         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
 254         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
 255         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
 256         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
 257         WLAN_STATUS_CHALLENGE_FAIL = 15,
 258         WLAN_STATUS_AUTH_TIMEOUT = 16,
 259         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
 260         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
 261         /* 802.11b */
 262         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
 263         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
 264         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
 265         /* 802.11h */
 266         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
 267         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
 268         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
 269         /* 802.11g */
 270         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
 271         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
 272         /* 802.11i */
 273         WLAN_STATUS_INVALID_IE = 40,
 274         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
 275         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
 276         WLAN_STATUS_INVALID_AKMP = 43,
 277         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
 278         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
 279         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
 280 };
 281
 282 /* Reason codes */
 283 enum ieee80211_reasoncode {
 284         WLAN_REASON_UNSPECIFIED = 1,
 285         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
 286         WLAN_REASON_DEAUTH_LEAVING = 3,
 287         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
 288         WLAN_REASON_DISASSOC_AP_BUSY = 5,
 289         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
 290         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
 291         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
 292         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
 293         /* 802.11h */
 294         WLAN_REASON_DISASSOC_BAD_POWER = 10,
 295         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
 296         /* 802.11i */
 297         WLAN_REASON_INVALID_IE = 13,
 298         WLAN_REASON_MIC_FAILURE = 14,
 299         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
 300         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
 301         WLAN_REASON_IE_DIFFERENT = 17,
 302         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
 303         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
 304         WLAN_REASON_INVALID_AKMP = 20,
 305         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
 306         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
 307         WLAN_REASON_IEEE8021X_FAILED = 23,
 308         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
 309 };
 310
 311 #define IEEE80211_STATMASK_SIGNAL (1<<0)
 312 #define IEEE80211_STATMASK_RSSI (1<<1)
 313 #define IEEE80211_STATMASK_NOISE (1<<2)
 314 #define IEEE80211_STATMASK_RATE (1<<3)
 315 #define IEEE80211_STATMASK_WEMASK 0x7
 316
 317 #define IEEE80211_CCK_MODULATION    (1<<0)
 318 #define IEEE80211_OFDM_MODULATION   (1<<1)
 319
 320 #define IEEE80211_24GHZ_BAND     (1<<0)
 321 #define IEEE80211_52GHZ_BAND     (1<<1)
 322
 323 #define IEEE80211_CCK_RATE_1MB                  0x02
 324 #define IEEE80211_CCK_RATE_2MB                  0x04
 325 #define IEEE80211_CCK_RATE_5MB                  0x0B
 326 #define IEEE80211_CCK_RATE_11MB                 0x16
 327 #define IEEE80211_OFDM_RATE_6MB                 0x0C
 328 #define IEEE80211_OFDM_RATE_9MB                 0x12
 329 #define IEEE80211_OFDM_RATE_12MB                0x18
 330 #define IEEE80211_OFDM_RATE_18MB                0x24
 331 #define IEEE80211_OFDM_RATE_24MB                0x30
 332 #define IEEE80211_OFDM_RATE_36MB                0x48
 333 #define IEEE80211_OFDM_RATE_48MB                0x60
 334 #define IEEE80211_OFDM_RATE_54MB                0x6C
 335 #define IEEE80211_BASIC_RATE_MASK               0x80
 336
 337 #define IEEE80211_CCK_RATE_1MB_MASK             (1<<0)
 338 #define IEEE80211_CCK_RATE_2MB_MASK             (1<<1)
 339 #define IEEE80211_CCK_RATE_5MB_MASK             (1<<2)
 340 #define IEEE80211_CCK_RATE_11MB_MASK            (1<<3)
 341 #define IEEE80211_OFDM_RATE_6MB_MASK            (1<<4)
 342 #define IEEE80211_OFDM_RATE_9MB_MASK            (1<<5)
 343 #define IEEE80211_OFDM_RATE_12MB_MASK           (1<<6)
 344 #define IEEE80211_OFDM_RATE_18MB_MASK           (1<<7)
 345 #define IEEE80211_OFDM_RATE_24MB_MASK           (1<<8)
 346 #define IEEE80211_OFDM_RATE_36MB_MASK           (1<<9)
 347 #define IEEE80211_OFDM_RATE_48MB_MASK           (1<<10)
 348 #define IEEE80211_OFDM_RATE_54MB_MASK           (1<<11)
 349
 350 #define IEEE80211_CCK_RATES_MASK                0x0000000F
 351 #define IEEE80211_CCK_BASIC_RATES_MASK  (IEEE80211_CCK_RATE_1MB_MASK | \
 352         IEEE80211_CCK_RATE_2MB_MASK)
 353 #define IEEE80211_CCK_DEFAULT_RATES_MASK        (IEEE80211_CCK_BASIC_RATES_MASK | \
 354         IEEE80211_CCK_RATE_5MB_MASK | \
 355         IEEE80211_CCK_RATE_11MB_MASK)
 356
 357 #define IEEE80211_OFDM_RATES_MASK               0x00000FF0
 358 #define IEEE80211_OFDM_BASIC_RATES_MASK (IEEE80211_OFDM_RATE_6MB_MASK | \
 359         IEEE80211_OFDM_RATE_12MB_MASK | \
 360         IEEE80211_OFDM_RATE_24MB_MASK)
 361 #define IEEE80211_OFDM_DEFAULT_RATES_MASK       (IEEE80211_OFDM_BASIC_RATES_MASK | \
 362         IEEE80211_OFDM_RATE_9MB_MASK  | \
 363         IEEE80211_OFDM_RATE_18MB_MASK | \
 364         IEEE80211_OFDM_RATE_36MB_MASK | \
 365         IEEE80211_OFDM_RATE_48MB_MASK | \
 366         IEEE80211_OFDM_RATE_54MB_MASK)
 367 #define IEEE80211_DEFAULT_RATES_MASK (IEEE80211_OFDM_DEFAULT_RATES_MASK | \
 368                                 IEEE80211_CCK_DEFAULT_RATES_MASK)
 369
 370 #define IEEE80211_NUM_OFDM_RATES            8
 371 #define IEEE80211_NUM_CCK_RATES             4
 372 #define IEEE80211_OFDM_SHIFT_MASK_A         4
 373
 374 /* NOTE: This data is for statistical purposes; not all hardware provides this
 375  *       information for frames received.  Not setting these will not cause
 376  *       any adverse affects. */
 377 struct ieee80211_rx_stats {
 378         u32 mac_time;
 379         s8 rssi;
 380         u8 signal;
 381         u8 noise;
 382         u16 rate;               /* in 100 kbps */
 383         u8 received_channel;
 384         u8 control;
 385         u8 mask;
 386         u8 freq;
 387         u16 len;
 388 };
 389
 390 /* IEEE 802.11 requires that STA supports concurrent reception of at least
 391  * three fragmented frames. This define can be increased to support more
 392  * concurrent frames, but it should be noted that each entry can consume about
 393  * 2 kB of RAM and increasing cache size will slow down frame reassembly. */
 394 #define IEEE80211_FRAG_CACHE_LEN 4
 395
 396 struct ieee80211_frag_entry {
 397         unsigned long first_frag_time;
 398         unsigned int seq;
 399         unsigned int last_frag;
 400         struct sk_buff *skb;
 401         u8 src_addr[ETH_ALEN];
 402         u8 dst_addr[ETH_ALEN];
 403 };
 404
 405 struct ieee80211_stats {
 406         unsigned int tx_unicast_frames;
 407         unsigned int tx_multicast_frames;
 408         unsigned int tx_fragments;
 409         unsigned int tx_unicast_octets;
 410         unsigned int tx_multicast_octets;
 411         unsigned int tx_deferred_transmissions;
 412         unsigned int tx_single_retry_frames;
 413         unsigned int tx_multiple_retry_frames;
 414         unsigned int tx_retry_limit_exceeded;
 415         unsigned int tx_discards;
 416         unsigned int rx_unicast_frames;
 417         unsigned int rx_multicast_frames;
 418         unsigned int rx_fragments;
 419         unsigned int rx_unicast_octets;
 420         unsigned int rx_multicast_octets;
 421         unsigned int rx_fcs_errors;
 422         unsigned int rx_discards_no_buffer;
 423         unsigned int tx_discards_wrong_sa;
 424         unsigned int rx_discards_undecryptable;
 425         unsigned int rx_message_in_msg_fragments;
 426         unsigned int rx_message_in_bad_msg_fragments;
 427 };
 428
 429 struct ieee80211_device;
 430
 431 #include "ieee80211_crypt.h"
 432
 433 #define SEC_KEY_1               (1<<0)
 434 #define SEC_KEY_2               (1<<1)
 435 #define SEC_KEY_3               (1<<2)
 436 #define SEC_KEY_4               (1<<3)
 437 #define SEC_ACTIVE_KEY          (1<<4)
 438 #define SEC_AUTH_MODE           (1<<5)
 439 #define SEC_UNICAST_GROUP       (1<<6)
 440 #define SEC_LEVEL               (1<<7)
 441 #define SEC_ENABLED             (1<<8)
 442 #define SEC_ENCRYPT             (1<<9)
 443
 444 #define SEC_LEVEL_0             0       /* None */
 445 #define SEC_LEVEL_1             1       /* WEP 40 and 104 bit */
 446 #define SEC_LEVEL_2             2       /* Level 1 + TKIP */
 447 #define SEC_LEVEL_2_CKIP        3       /* Level 1 + CKIP */
 448 #define SEC_LEVEL_3             4       /* Level 2 + CCMP */
 449
 450 #define WEP_KEYS                4
 451 #define WEP_KEY_LEN             13
 452 #define SCM_KEY_LEN             32
 453 #define SCM_TEMPORAL_KEY_LENGTH 16
 454
 455 struct ieee80211_security {
 456         u16 active_key:2,
 457             enabled:1,
 458             auth_mode:2, auth_algo:4, unicast_uses_group:1, encrypt:1;
 459         u8 key_sizes[WEP_KEYS];
 460         u8 keys[WEP_KEYS][SCM_KEY_LEN];
 461         u8 level;
 462         u16 flags;
 463 } __attribute__ ((packed));
 464
 465 /*
 466
 467  802.11 data frame from AP
 468
 469       ,-------------------------------------------------------------------.
 470 Bytes |  2   |  2   |    6    |    6    |    6    |  2   | 0..2312 |   4  |
 471       |------|------|---------|---------|---------|------|---------|------|
 472 Desc. | ctrl | dura |  DA/RA  |   TA    |    SA   | Sequ |  frame  |  fcs |
 473       |      | tion | (BSSID) |         |         | ence |  data   |      |
 474       `-------------------------------------------------------------------'
 475
 476 Total: 28-2340 bytes
 477
 478 */
 479
 480 #define BEACON_PROBE_SSID_ID_POSITION 12
 481
 482 /* Management Frame Information Element Types */
 483 enum ieee80211_mfie {
 484         MFIE_TYPE_SSID = 0,
 485         MFIE_TYPE_RATES = 1,
 486         MFIE_TYPE_FH_SET = 2,
 487         MFIE_TYPE_DS_SET = 3,
 488         MFIE_TYPE_CF_SET = 4,
 489         MFIE_TYPE_TIM = 5,
 490         MFIE_TYPE_IBSS_SET = 6,
 491         MFIE_TYPE_COUNTRY = 7,
 492         MFIE_TYPE_HOP_PARAMS = 8,
 493         MFIE_TYPE_HOP_TABLE = 9,
 494         MFIE_TYPE_REQUEST = 10,
 495         MFIE_TYPE_CHALLENGE = 16,
 496         MFIE_TYPE_POWER_CONSTRAINT = 32,
 497         MFIE_TYPE_POWER_CAPABILITY = 33,
 498         MFIE_TYPE_TPC_REQUEST = 34,
 499         MFIE_TYPE_TPC_REPORT = 35,
 500         MFIE_TYPE_SUPP_CHANNELS = 36,
 501         MFIE_TYPE_CSA = 37,
 502         MFIE_TYPE_MEASURE_REQUEST = 38,
 503         MFIE_TYPE_MEASURE_REPORT = 39,
 504         MFIE_TYPE_QUIET = 40,
 505         MFIE_TYPE_IBSS_DFS = 41,
 506         MFIE_TYPE_ERP_INFO = 42,
 507         MFIE_TYPE_RSN = 48,
 508         MFIE_TYPE_RATES_EX = 50,
 509         MFIE_TYPE_GENERIC = 221,
 510 };
 511
 512 struct ieee80211_info_element {
 513         u8 id;
 514         u8 len;
 515         u8 data[0];
 516 } __attribute__ ((packed));
 517
 518 /*
 519  * These are the data types that can make up management packets
 520  *
 521         u16 auth_algorithm;
 522         u16 auth_sequence;
 523         u16 beacon_interval;
 524         u16 capability;
 525         u8 current_ap[ETH_ALEN];
 526         u16 listen_interval;
 527         struct {
 528                 u16 association_id:14, reserved:2;
 529         } __attribute__ ((packed));
 530         u32 time_stamp[2];
 531         u16 reason;
 532         u16 status;
 533 */
 534
 535 struct ieee80211_authentication {
 536         struct ieee80211_hdr_3addr header;
 537         __le16 algorithm;
 538         __le16 transaction;
 539         __le16 status;
 540         struct ieee80211_info_element info_element[0];
 541 } __attribute__ ((packed));
 542
 543 struct ieee80211_probe_response {
 544         struct ieee80211_hdr_3addr header;
 545         u32 time_stamp[2];
 546         __le16 beacon_interval;
 547         __le16 capability;
 548         struct ieee80211_info_element info_element[0];
 549 } __attribute__ ((packed));
 550
 551 struct ieee80211_assoc_request_frame {
 552         __le16 capability;
 553         __le16 listen_interval;
 554         u8 current_ap[ETH_ALEN];
 555         struct ieee80211_info_element info_element[0];
 556 } __attribute__ ((packed));
 557
 558 struct ieee80211_assoc_response_frame {
 559         struct ieee80211_hdr_3addr header;
 560         __le16 capability;
 561         __le16 status;
 562         __le16 aid;
 563         struct ieee80211_info_element info_element[0];  /* supported rates */
 564 } __attribute__ ((packed));
 565
 566 struct ieee80211_txb {
 567         u8 nr_frags;
 568         u8 encrypted;
 569         u16 reserved;
 570         u16 frag_size;
 571         u16 payload_size;
 572         struct sk_buff *fragments[0];
 573 };
 574
 575 /* SWEEP TABLE ENTRIES NUMBER */
 576 #define MAX_SWEEP_TAB_ENTRIES             42
 577 #define MAX_SWEEP_TAB_ENTRIES_PER_PACKET  7
 578 /* MAX_RATES_LENGTH needs to be 12.  The spec says 8, and many APs
 579  * only use 8, and then use extended rates for the remaining supported
 580  * rates.  Other APs, however, stick all of their supported rates on the
 581  * main rates information element... */
 582 #define MAX_RATES_LENGTH                  ((u8)12)
 583 #define MAX_RATES_EX_LENGTH               ((u8)16)
 584 #define MAX_NETWORK_COUNT                  128
 585
 586 #define CRC_LENGTH                 4U
 587
 588 #define MAX_WPA_IE_LEN 64
 589
 590 #define NETWORK_EMPTY_ESSID (1<<0)
 591 #define NETWORK_HAS_OFDM    (1<<1)
 592 #define NETWORK_HAS_CCK     (1<<2)
 593
 594 struct ieee80211_network {
 595         /* These entries are used to identify a unique network */
 596         u8 bssid[ETH_ALEN];
 597         u8 channel;
 598         /* Ensure null-terminated for any debug msgs */
 599         u8 ssid[IW_ESSID_MAX_SIZE + 1];
 600         u8 ssid_len;
 601
 602         /* These are network statistics */
 603         struct ieee80211_rx_stats stats;
 604         u16 capability;
 605         u8 rates[MAX_RATES_LENGTH];
 606         u8 rates_len;
 607         u8 rates_ex[MAX_RATES_EX_LENGTH];
 608         u8 rates_ex_len;
 609         unsigned long last_scanned;
 610         u8 mode;
 611         u8 flags;
 612         u32 last_associate;
 613         u32 time_stamp[2];
 614         u16 beacon_interval;
 615         u16 listen_interval;
 616         u16 atim_window;
 617         u8 wpa_ie[MAX_WPA_IE_LEN];
 618         size_t wpa_ie_len;
 619         u8 rsn_ie[MAX_WPA_IE_LEN];
 620         size_t rsn_ie_len;
 621         struct list_head list;
 622 };
 623
 624 enum ieee80211_state {
 625         IEEE80211_UNINITIALIZED = 0,
 626         IEEE80211_INITIALIZED,
 627         IEEE80211_ASSOCIATING,
 628         IEEE80211_ASSOCIATED,
 629         IEEE80211_AUTHENTICATING,
 630         IEEE80211_AUTHENTICATED,
 631         IEEE80211_SHUTDOWN
 632 };
 633
 634 #define DEFAULT_MAX_SCAN_AGE (15 * HZ)
 635 #define DEFAULT_FTS 2346
 636
 637 #define CFG_IEEE80211_RESERVE_FCS (1<<0)
 638 #define CFG_IEEE80211_COMPUTE_FCS (1<<1)
 639
 640 struct ieee80211_device {
 641         struct net_device *dev;
 642         struct ieee80211_security sec;
 643
 644         /* Bookkeeping structures */
 645         struct net_device_stats stats;
 646         struct ieee80211_stats ieee_stats;
 647
 648         /* Probe / Beacon management */
 649         struct list_head network_free_list;
 650         struct list_head network_list;
 651         struct ieee80211_network *networks;
 652         int scans;
 653         int scan_age;
 654
 655         int iw_mode;            /* operating mode (IW_MODE_*) */
 656         struct iw_spy_data spy_data;    /* iwspy support */
 657
 658         spinlock_t lock;
 659
 660         int tx_headroom;        /* Set to size of any additional room needed at front
 661                                  * of allocated Tx SKBs */
 662         u32 config;
 663
 664         /* WEP and other encryption related settings at the device level */
 665         int open_wep;           /* Set to 1 to allow unencrypted frames */
 666
 667         int reset_on_keychange; /* Set to 1 if the HW needs to be reset on
 668                                  * WEP key changes */
 669
 670         /* If the host performs {en,de}cryption, then set to 1 */
 671         int host_encrypt;
 672         int host_decrypt;
 673         int ieee802_1x;         /* is IEEE 802.1X used */
 674
 675         /* WPA data */
 676         int wpa_enabled;
 677         int drop_unencrypted;
 678         int tkip_countermeasures;
 679         int privacy_invoked;
 680         size_t wpa_ie_len;
 681         u8 *wpa_ie;
 682
 683         struct list_head crypt_deinit_list;
 684         struct ieee80211_crypt_data *crypt[WEP_KEYS];
 685         int tx_keyidx;          /* default TX key index (crypt[tx_keyidx]) */
 686         struct timer_list crypt_deinit_timer;
 687         int crypt_quiesced;
 688
 689         int bcrx_sta_key;       /* use individual keys to override default keys even
 690                                  * with RX of broad/multicast frames */
 691
 692         /* Fragmentation structures */
 693         struct ieee80211_frag_entry frag_cache[IEEE80211_FRAG_CACHE_LEN];
 694         unsigned int frag_next_idx;
 695         u16 fts;                /* Fragmentation Threshold */
 696
 697         /* Association info */
 698         u8 bssid[ETH_ALEN];
 699
 700         enum ieee80211_state state;
 701
 702         int mode;               /* A, B, G */
 703         int modulation;         /* CCK, OFDM */
 704         int freq_band;          /* 2.4Ghz, 5.2Ghz, Mixed */
 705         int abg_true;           /* ABG flag              */
 706
 707         int perfect_rssi;
 708         int worst_rssi;
 709
 710         /* Callback functions */
 711         void (*set_security) (struct net_device * dev,
 712                               struct ieee80211_security * sec);
 713         int (*hard_start_xmit) (struct ieee80211_txb * txb,
 714                                 struct net_device * dev);
 715         int (*reset_port) (struct net_device * dev);
 716
 717         /* This must be the last item so that it points to the data
 718          * allocated beyond this structure by alloc_ieee80211 */
 719         u8 priv[0];
 720 };
 721
 722 #define IEEE_A            (1<<0)
 723 #define IEEE_B            (1<<1)
 724 #define IEEE_G            (1<<2)
 725 #define IEEE_MODE_MASK    (IEEE_A|IEEE_B|IEEE_G)
 726
 727 extern inline void *ieee80211_priv(struct net_device *dev)
 728 {
 729         return ((struct ieee80211_device *)netdev_priv(dev))->priv;
 730 }
 731
 732 extern inline int ieee80211_is_empty_essid(const char *essid, int essid_len)
 733 {
 734         /* Single white space is for Linksys APs */
 735         if (essid_len == 1 && essid[0] == ' ')
 736                 return 1;
 737
 738         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 739         while (essid_len) {
 740                 essid_len--;
 741                 if (essid[essid_len] != '\0')
 742                         return 0;
 743         }
 744
 745         return 1;
 746 }
 747
 748 extern inline int ieee80211_is_valid_mode(struct ieee80211_device *ieee,
 749                                           int mode)
 750 {
 751         /*
 752          * It is possible for both access points and our device to support
 753          * combinations of modes, so as long as there is one valid combination
 754          * of ap/device supported modes, then return success
 755          *
 756          */
 757         if ((mode & IEEE_A) &&
 758             (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
 759             (ieee->freq_band & IEEE80211_52GHZ_BAND))
 760                 return 1;
 761
 762         if ((mode & IEEE_G) &&
 763             (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
 764             (ieee->freq_band & IEEE80211_24GHZ_BAND))
 765                 return 1;
 766
 767         if ((mode & IEEE_B) &&
 768             (ieee->modulation & IEEE80211_CCK_MODULATION) &&
 769             (ieee->freq_band & IEEE80211_24GHZ_BAND))
 770                 return 1;
 771
 772         return 0;
 773 }
 774
 775 extern inline int ieee80211_get_hdrlen(u16 fc)
 776 {
 777         int hdrlen = IEEE80211_3ADDR_LEN;
 778
 779         switch (WLAN_FC_GET_TYPE(fc)) {
 780         case IEEE80211_FTYPE_DATA:
 781                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 782                         hdrlen = IEEE80211_4ADDR_LEN;
 783                 break;
 784         case IEEE80211_FTYPE_CTL:
 785                 switch (WLAN_FC_GET_STYPE(fc)) {
 786                 case IEEE80211_STYPE_CTS:
 787                 case IEEE80211_STYPE_ACK:
 788                         hdrlen = IEEE80211_1ADDR_LEN;
 789                         break;
 790                 default:
 791                         hdrlen = IEEE80211_2ADDR_LEN;
 792                         break;
 793                 }
 794                 break;
 795         }
 796
 797         return hdrlen;
 798 }
 799
 800 /* ieee80211.c */
 801 extern void free_ieee80211(struct net_device *dev);
 802 extern struct net_device *alloc_ieee80211(int sizeof_priv);
 803
 804 extern int ieee80211_set_encryption(struct ieee80211_device *ieee);
 805
 806 /* ieee80211_tx.c */
 807 extern int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev);
 808 extern void ieee80211_txb_free(struct ieee80211_txb *);
 809
 810 /* ieee80211_rx.c */
 811 extern int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 812                         struct ieee80211_rx_stats *rx_stats);
 813 extern void ieee80211_rx_mgt(struct ieee80211_device *ieee,
 814                              struct ieee80211_hdr *header,
 815                              struct ieee80211_rx_stats *stats);
 816
 817 /* ieee80211_wx.c */
 818 extern int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
 819                                  struct iw_request_info *info,
 820                                  union iwreq_data *wrqu, char *key);
 821 extern int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 822                                    struct iw_request_info *info,
 823                                    union iwreq_data *wrqu, char *key);
 824 extern int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
 825                                    struct iw_request_info *info,
 826                                    union iwreq_data *wrqu, char *key);
 827
 828 extern inline void ieee80211_increment_scans(struct ieee80211_device *ieee)
 829 {
 830         ieee->scans++;
 831 }
 832
 833 extern inline int ieee80211_get_scans(struct ieee80211_device *ieee)
 834 {
 835         return ieee->scans;
 836 }
 837
 838 #endif                          /* IEEE80211_H */