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_1ADDR_LEN 10
  37 #define IEEE80211_2ADDR_LEN 16
  38 #define IEEE80211_3ADDR_LEN 24
  39 #define IEEE80211_4ADDR_LEN 30
  40 #define IEEE80211_FCS_LEN    4
  41 #define IEEE80211_HLEN                  (IEEE80211_4ADDR_LEN)
  42 #define IEEE80211_FRAME_LEN             (IEEE80211_DATA_LEN + IEEE80211_HLEN)
  43
  44 #define MIN_FRAG_THRESHOLD     256U
  45 #define MAX_FRAG_THRESHOLD     2346U
  46
  47 /* Frame control field constants */
  48 #define IEEE80211_FCTL_VERS             0x0003
  49 #define IEEE80211_FCTL_FTYPE            0x000c
  50 #define IEEE80211_FCTL_STYPE            0x00f0
  51 #define IEEE80211_FCTL_TODS             0x0100
  52 #define IEEE80211_FCTL_FROMDS           0x0200
  53 #define IEEE80211_FCTL_MOREFRAGS        0x0400
  54 #define IEEE80211_FCTL_RETRY            0x0800
  55 #define IEEE80211_FCTL_PM               0x1000
  56 #define IEEE80211_FCTL_MOREDATA         0x2000
  57 #define IEEE80211_FCTL_PROTECTED        0x4000
  58 #define IEEE80211_FCTL_ORDER            0x8000
  59
  60 #define IEEE80211_FTYPE_MGMT            0x0000
  61 #define IEEE80211_FTYPE_CTL             0x0004
  62 #define IEEE80211_FTYPE_DATA            0x0008
  63
  64 /* management */
  65 #define IEEE80211_STYPE_ASSOC_REQ       0x0000
  66 #define IEEE80211_STYPE_ASSOC_RESP      0x0010
  67 #define IEEE80211_STYPE_REASSOC_REQ     0x0020
  68 #define IEEE80211_STYPE_REASSOC_RESP    0x0030
  69 #define IEEE80211_STYPE_PROBE_REQ       0x0040
  70 #define IEEE80211_STYPE_PROBE_RESP      0x0050
  71 #define IEEE80211_STYPE_BEACON          0x0080
  72 #define IEEE80211_STYPE_ATIM            0x0090
  73 #define IEEE80211_STYPE_DISASSOC        0x00A0
  74 #define IEEE80211_STYPE_AUTH            0x00B0
  75 #define IEEE80211_STYPE_DEAUTH          0x00C0
  76 #define IEEE80211_STYPE_ACTION          0x00D0
  77
  78 /* control */
  79 #define IEEE80211_STYPE_PSPOLL          0x00A0
  80 #define IEEE80211_STYPE_RTS             0x00B0
  81 #define IEEE80211_STYPE_CTS             0x00C0
  82 #define IEEE80211_STYPE_ACK             0x00D0
  83 #define IEEE80211_STYPE_CFEND           0x00E0
  84 #define IEEE80211_STYPE_CFENDACK        0x00F0
  85
  86 /* data */
  87 #define IEEE80211_STYPE_DATA            0x0000
  88 #define IEEE80211_STYPE_DATA_CFACK      0x0010
  89 #define IEEE80211_STYPE_DATA_CFPOLL     0x0020
  90 #define IEEE80211_STYPE_DATA_CFACKPOLL  0x0030
  91 #define IEEE80211_STYPE_NULLFUNC        0x0040
  92 #define IEEE80211_STYPE_CFACK           0x0050
  93 #define IEEE80211_STYPE_CFPOLL          0x0060
  94 #define IEEE80211_STYPE_CFACKPOLL       0x0070
  95
  96 #define IEEE80211_SCTL_FRAG             0x000F
  97 #define IEEE80211_SCTL_SEQ              0xFFF0
  98
  99 /* debug macros */
 100
 101 #ifdef CONFIG_IEEE80211_DEBUG
 102 extern u32 ieee80211_debug_level;
 103 #define IEEE80211_DEBUG(level, fmt, args...) \
 104 do { if (ieee80211_debug_level & (level)) \
 105   printk(KERN_DEBUG "ieee80211: %c %s " fmt, \
 106          in_interrupt() ? 'I' : 'U', __FUNCTION__ , ## args); } while (0)
 107 #else
 108 #define IEEE80211_DEBUG(level, fmt, args...) do {} while (0)
 109 #endif                          /* CONFIG_IEEE80211_DEBUG */
 110
 111 /* debug macros not dependent on CONFIG_IEEE80211_DEBUG */
 112
 113 #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
 114 #define MAC_ARG(x) ((u8*)(x))[0],((u8*)(x))[1],((u8*)(x))[2],((u8*)(x))[3],((u8*)(x))[4],((u8*)(x))[5]
 115
 116 /* escape_essid() is intended to be used in debug (and possibly error)
 117  * messages. It should never be used for passing essid to user space. */
 118 const char *escape_essid(const char *essid, u8 essid_len);
 119
 120 /*
 121  * To use the debug system:
 122  *
 123  * If you are defining a new debug classification, simply add it to the #define
 124  * list here in the form of:
 125  *
 126  * #define IEEE80211_DL_xxxx VALUE
 127  *
 128  * shifting value to the left one bit from the previous entry.  xxxx should be
 129  * the name of the classification (for example, WEP)
 130  *
 131  * You then need to either add a IEEE80211_xxxx_DEBUG() macro definition for your
 132  * classification, or use IEEE80211_DEBUG(IEEE80211_DL_xxxx, ...) whenever you want
 133  * to send output to that classification.
 134  *
 135  * To add your debug level to the list of levels seen when you perform
 136  *
 137  * % cat /proc/net/ieee80211/debug_level
 138  *
 139  * you simply need to add your entry to the ieee80211_debug_level array.
 140  *
 141  * If you do not see debug_level in /proc/net/ieee80211 then you do not have
 142  * CONFIG_IEEE80211_DEBUG defined in your kernel configuration
 143  *
 144  */
 145
 146 #define IEEE80211_DL_INFO          (1<<0)
 147 #define IEEE80211_DL_WX            (1<<1)
 148 #define IEEE80211_DL_SCAN          (1<<2)
 149 #define IEEE80211_DL_STATE         (1<<3)
 150 #define IEEE80211_DL_MGMT          (1<<4)
 151 #define IEEE80211_DL_FRAG          (1<<5)
 152 #define IEEE80211_DL_DROP          (1<<7)
 153
 154 #define IEEE80211_DL_TX            (1<<8)
 155 #define IEEE80211_DL_RX            (1<<9)
 156
 157 #define IEEE80211_ERROR(f, a...) printk(KERN_ERR "ieee80211: " f, ## a)
 158 #define IEEE80211_WARNING(f, a...) printk(KERN_WARNING "ieee80211: " f, ## a)
 159 #define IEEE80211_DEBUG_INFO(f, a...)   IEEE80211_DEBUG(IEEE80211_DL_INFO, f, ## a)
 160
 161 #define IEEE80211_DEBUG_WX(f, a...)     IEEE80211_DEBUG(IEEE80211_DL_WX, f, ## a)
 162 #define IEEE80211_DEBUG_SCAN(f, a...)   IEEE80211_DEBUG(IEEE80211_DL_SCAN, f, ## a)
 163 #define IEEE80211_DEBUG_STATE(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_STATE, f, ## a)
 164 #define IEEE80211_DEBUG_MGMT(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_MGMT, f, ## a)
 165 #define IEEE80211_DEBUG_FRAG(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_FRAG, f, ## a)
 166 #define IEEE80211_DEBUG_DROP(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_DROP, f, ## a)
 167 #define IEEE80211_DEBUG_TX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_TX, f, ## a)
 168 #define IEEE80211_DEBUG_RX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_RX, f, ## a)
 169 #include <linux/netdevice.h>
 170 #include <linux/wireless.h>
 171 #include <linux/if_arp.h>       /* ARPHRD_ETHER */
 172
 173 #ifndef WIRELESS_SPY
 174 #define WIRELESS_SPY            /* enable iwspy support */
 175 #endif
 176 #include <net/iw_handler.h>     /* new driver API */
 177
 178 #ifndef ETH_P_PAE
 179 #define ETH_P_PAE 0x888E        /* Port Access Entity (IEEE 802.1X) */
 180 #endif                          /* ETH_P_PAE */
 181
 182 #define ETH_P_PREAUTH 0x88C7    /* IEEE 802.11i pre-authentication */
 183
 184 #ifndef ETH_P_80211_RAW
 185 #define ETH_P_80211_RAW (ETH_P_ECONET + 1)
 186 #endif
 187
 188 /* IEEE 802.11 defines */
 189
 190 #define P80211_OUI_LEN 3
 191
 192 struct ieee80211_snap_hdr {
 193
 194         u8 dsap;                /* always 0xAA */
 195         u8 ssap;                /* always 0xAA */
 196         u8 ctrl;                /* always 0x03 */
 197         u8 oui[P80211_OUI_LEN]; /* organizational universal id */
 198
 199 } __attribute__ ((packed));
 200
 201 #define SNAP_SIZE sizeof(struct ieee80211_snap_hdr)
 202
 203 #define WLAN_FC_GET_VERS(fc) ((fc) & IEEE80211_FCTL_VERS)
 204 #define WLAN_FC_GET_TYPE(fc) ((fc) & IEEE80211_FCTL_FTYPE)
 205 #define WLAN_FC_GET_STYPE(fc) ((fc) & IEEE80211_FCTL_STYPE)
 206
 207 #define WLAN_GET_SEQ_FRAG(seq) ((seq) & IEEE80211_SCTL_FRAG)
 208 #define WLAN_GET_SEQ_SEQ(seq)  ((seq) & IEEE80211_SCTL_SEQ)
 209
 210 /* Authentication algorithms */
 211 #define WLAN_AUTH_OPEN 0
 212 #define WLAN_AUTH_SHARED_KEY 1
 213
 214 #define WLAN_AUTH_CHALLENGE_LEN 128
 215
 216 #define WLAN_CAPABILITY_ESS (1<<0)
 217 #define WLAN_CAPABILITY_IBSS (1<<1)
 218 #define WLAN_CAPABILITY_CF_POLLABLE (1<<2)
 219 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
 220 #define WLAN_CAPABILITY_PRIVACY (1<<4)
 221 #define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
 222 #define WLAN_CAPABILITY_PBCC (1<<6)
 223 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
 224 #define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8)
 225 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
 226 #define WLAN_CAPABILITY_OSSS_OFDM (1<<13)
 227
 228 /* Status codes */
 229 enum ieee80211_statuscode {
 230         WLAN_STATUS_SUCCESS = 0,
 231         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
 232         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
 233         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
 234         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
 235         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
 236         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
 237         WLAN_STATUS_CHALLENGE_FAIL = 15,
 238         WLAN_STATUS_AUTH_TIMEOUT = 16,
 239         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
 240         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
 241         /* 802.11b */
 242         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
 243         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
 244         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
 245         /* 802.11h */
 246         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
 247         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
 248         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
 249         /* 802.11g */
 250         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
 251         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
 252         /* 802.11i */
 253         WLAN_STATUS_INVALID_IE = 40,
 254         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
 255         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
 256         WLAN_STATUS_INVALID_AKMP = 43,
 257         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
 258         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
 259         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
 260 };
 261
 262 /* Reason codes */
 263 enum ieee80211_reasoncode {
 264         WLAN_REASON_UNSPECIFIED = 1,
 265         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
 266         WLAN_REASON_DEAUTH_LEAVING = 3,
 267         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
 268         WLAN_REASON_DISASSOC_AP_BUSY = 5,
 269         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
 270         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
 271         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
 272         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
 273         /* 802.11h */
 274         WLAN_REASON_DISASSOC_BAD_POWER = 10,
 275         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
 276         /* 802.11i */
 277         WLAN_REASON_INVALID_IE = 13,
 278         WLAN_REASON_MIC_FAILURE = 14,
 279         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
 280         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
 281         WLAN_REASON_IE_DIFFERENT = 17,
 282         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
 283         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
 284         WLAN_REASON_INVALID_AKMP = 20,
 285         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
 286         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
 287         WLAN_REASON_IEEE8021X_FAILED = 23,
 288         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
 289 };
 290
 291 #define IEEE80211_STATMASK_SIGNAL (1<<0)
 292 #define IEEE80211_STATMASK_RSSI (1<<1)
 293 #define IEEE80211_STATMASK_NOISE (1<<2)
 294 #define IEEE80211_STATMASK_RATE (1<<3)
 295 #define IEEE80211_STATMASK_WEMASK 0x7
 296
 297 #define IEEE80211_CCK_MODULATION    (1<<0)
 298 #define IEEE80211_OFDM_MODULATION   (1<<1)
 299
 300 #define IEEE80211_24GHZ_BAND     (1<<0)
 301 #define IEEE80211_52GHZ_BAND     (1<<1)
 302
 303 #define IEEE80211_CCK_RATE_1MB                  0x02
 304 #define IEEE80211_CCK_RATE_2MB                  0x04
 305 #define IEEE80211_CCK_RATE_5MB                  0x0B
 306 #define IEEE80211_CCK_RATE_11MB                 0x16
 307 #define IEEE80211_OFDM_RATE_6MB                 0x0C
 308 #define IEEE80211_OFDM_RATE_9MB                 0x12
 309 #define IEEE80211_OFDM_RATE_12MB                0x18
 310 #define IEEE80211_OFDM_RATE_18MB                0x24
 311 #define IEEE80211_OFDM_RATE_24MB                0x30
 312 #define IEEE80211_OFDM_RATE_36MB                0x48
 313 #define IEEE80211_OFDM_RATE_48MB                0x60
 314 #define IEEE80211_OFDM_RATE_54MB                0x6C
 315 #define IEEE80211_BASIC_RATE_MASK               0x80
 316
 317 #define IEEE80211_CCK_RATE_1MB_MASK             (1<<0)
 318 #define IEEE80211_CCK_RATE_2MB_MASK             (1<<1)
 319 #define IEEE80211_CCK_RATE_5MB_MASK             (1<<2)
 320 #define IEEE80211_CCK_RATE_11MB_MASK            (1<<3)
 321 #define IEEE80211_OFDM_RATE_6MB_MASK            (1<<4)
 322 #define IEEE80211_OFDM_RATE_9MB_MASK            (1<<5)
 323 #define IEEE80211_OFDM_RATE_12MB_MASK           (1<<6)
 324 #define IEEE80211_OFDM_RATE_18MB_MASK           (1<<7)
 325 #define IEEE80211_OFDM_RATE_24MB_MASK           (1<<8)
 326 #define IEEE80211_OFDM_RATE_36MB_MASK           (1<<9)
 327 #define IEEE80211_OFDM_RATE_48MB_MASK           (1<<10)
 328 #define IEEE80211_OFDM_RATE_54MB_MASK           (1<<11)
 329
 330 #define IEEE80211_CCK_RATES_MASK                0x0000000F
 331 #define IEEE80211_CCK_BASIC_RATES_MASK  (IEEE80211_CCK_RATE_1MB_MASK | \
 332         IEEE80211_CCK_RATE_2MB_MASK)
 333 #define IEEE80211_CCK_DEFAULT_RATES_MASK        (IEEE80211_CCK_BASIC_RATES_MASK | \
 334         IEEE80211_CCK_RATE_5MB_MASK | \
 335         IEEE80211_CCK_RATE_11MB_MASK)
 336
 337 #define IEEE80211_OFDM_RATES_MASK               0x00000FF0
 338 #define IEEE80211_OFDM_BASIC_RATES_MASK (IEEE80211_OFDM_RATE_6MB_MASK | \
 339         IEEE80211_OFDM_RATE_12MB_MASK | \
 340         IEEE80211_OFDM_RATE_24MB_MASK)
 341 #define IEEE80211_OFDM_DEFAULT_RATES_MASK       (IEEE80211_OFDM_BASIC_RATES_MASK | \
 342         IEEE80211_OFDM_RATE_9MB_MASK  | \
 343         IEEE80211_OFDM_RATE_18MB_MASK | \
 344         IEEE80211_OFDM_RATE_36MB_MASK | \
 345         IEEE80211_OFDM_RATE_48MB_MASK | \
 346         IEEE80211_OFDM_RATE_54MB_MASK)
 347 #define IEEE80211_DEFAULT_RATES_MASK (IEEE80211_OFDM_DEFAULT_RATES_MASK | \
 348                                 IEEE80211_CCK_DEFAULT_RATES_MASK)
 349
 350 #define IEEE80211_NUM_OFDM_RATES            8
 351 #define IEEE80211_NUM_CCK_RATES             4
 352 #define IEEE80211_OFDM_SHIFT_MASK_A         4
 353
 354 /* NOTE: This data is for statistical purposes; not all hardware provides this
 355  *       information for frames received.  Not setting these will not cause
 356  *       any adverse affects. */
 357 struct ieee80211_rx_stats {
 358         u32 mac_time;
 359         s8 rssi;
 360         u8 signal;
 361         u8 noise;
 362         u16 rate;               /* in 100 kbps */
 363         u8 received_channel;
 364         u8 control;
 365         u8 mask;
 366         u8 freq;
 367         u16 len;
 368 };
 369
 370 /* IEEE 802.11 requires that STA supports concurrent reception of at least
 371  * three fragmented frames. This define can be increased to support more
 372  * concurrent frames, but it should be noted that each entry can consume about
 373  * 2 kB of RAM and increasing cache size will slow down frame reassembly. */
 374 #define IEEE80211_FRAG_CACHE_LEN 4
 375
 376 struct ieee80211_frag_entry {
 377         unsigned long first_frag_time;
 378         unsigned int seq;
 379         unsigned int last_frag;
 380         struct sk_buff *skb;
 381         u8 src_addr[ETH_ALEN];
 382         u8 dst_addr[ETH_ALEN];
 383 };
 384
 385 struct ieee80211_stats {
 386         unsigned int tx_unicast_frames;
 387         unsigned int tx_multicast_frames;
 388         unsigned int tx_fragments;
 389         unsigned int tx_unicast_octets;
 390         unsigned int tx_multicast_octets;
 391         unsigned int tx_deferred_transmissions;
 392         unsigned int tx_single_retry_frames;
 393         unsigned int tx_multiple_retry_frames;
 394         unsigned int tx_retry_limit_exceeded;
 395         unsigned int tx_discards;
 396         unsigned int rx_unicast_frames;
 397         unsigned int rx_multicast_frames;
 398         unsigned int rx_fragments;
 399         unsigned int rx_unicast_octets;
 400         unsigned int rx_multicast_octets;
 401         unsigned int rx_fcs_errors;
 402         unsigned int rx_discards_no_buffer;
 403         unsigned int tx_discards_wrong_sa;
 404         unsigned int rx_discards_undecryptable;
 405         unsigned int rx_message_in_msg_fragments;
 406         unsigned int rx_message_in_bad_msg_fragments;
 407 };
 408
 409 struct ieee80211_device;
 410
 411 #include "ieee80211_crypt.h"
 412
 413 #define SEC_KEY_1               (1<<0)
 414 #define SEC_KEY_2               (1<<1)
 415 #define SEC_KEY_3               (1<<2)
 416 #define SEC_KEY_4               (1<<3)
 417 #define SEC_ACTIVE_KEY          (1<<4)
 418 #define SEC_AUTH_MODE           (1<<5)
 419 #define SEC_UNICAST_GROUP       (1<<6)
 420 #define SEC_LEVEL               (1<<7)
 421 #define SEC_ENABLED             (1<<8)
 422 #define SEC_ENCRYPT             (1<<9)
 423
 424 #define SEC_LEVEL_0             0       /* None */
 425 #define SEC_LEVEL_1             1       /* WEP 40 and 104 bit */
 426 #define SEC_LEVEL_2             2       /* Level 1 + TKIP */
 427 #define SEC_LEVEL_2_CKIP        3       /* Level 1 + CKIP */
 428 #define SEC_LEVEL_3             4       /* Level 2 + CCMP */
 429
 430 #define SEC_ALG_NONE            0
 431 #define SEC_ALG_WEP             1
 432 #define SEC_ALG_TKIP            2
 433 #define SEC_ALG_CCMP            3
 434
 435 #define WEP_KEYS                4
 436 #define WEP_KEY_LEN             13
 437 #define SCM_KEY_LEN             32
 438 #define SCM_TEMPORAL_KEY_LENGTH 16
 439
 440 struct ieee80211_security {
 441         u16 active_key:2,
 442             enabled:1,
 443             auth_mode:2, auth_algo:4, unicast_uses_group:1, encrypt:1;
 444         u8 encode_alg[WEP_KEYS];
 445         u8 key_sizes[WEP_KEYS];
 446         u8 keys[WEP_KEYS][SCM_KEY_LEN];
 447         u8 level;
 448         u16 flags;
 449 } __attribute__ ((packed));
 450
 451 /*
 452
 453  802.11 data frame from AP
 454
 455       ,-------------------------------------------------------------------.
 456 Bytes |  2   |  2   |    6    |    6    |    6    |  2   | 0..2312 |   4  |
 457       |------|------|---------|---------|---------|------|---------|------|
 458 Desc. | ctrl | dura |  DA/RA  |   TA    |    SA   | Sequ |  frame  |  fcs |
 459       |      | tion | (BSSID) |         |         | ence |  data   |      |
 460       `-------------------------------------------------------------------'
 461
 462 Total: 28-2340 bytes
 463
 464 */
 465
 466 #define BEACON_PROBE_SSID_ID_POSITION 12
 467
 468 /* Management Frame Information Element Types */
 469 enum ieee80211_mfie {
 470         MFIE_TYPE_SSID = 0,
 471         MFIE_TYPE_RATES = 1,
 472         MFIE_TYPE_FH_SET = 2,
 473         MFIE_TYPE_DS_SET = 3,
 474         MFIE_TYPE_CF_SET = 4,
 475         MFIE_TYPE_TIM = 5,
 476         MFIE_TYPE_IBSS_SET = 6,
 477         MFIE_TYPE_COUNTRY = 7,
 478         MFIE_TYPE_HOP_PARAMS = 8,
 479         MFIE_TYPE_HOP_TABLE = 9,
 480         MFIE_TYPE_REQUEST = 10,
 481         MFIE_TYPE_CHALLENGE = 16,
 482         MFIE_TYPE_POWER_CONSTRAINT = 32,
 483         MFIE_TYPE_POWER_CAPABILITY = 33,
 484         MFIE_TYPE_TPC_REQUEST = 34,
 485         MFIE_TYPE_TPC_REPORT = 35,
 486         MFIE_TYPE_SUPP_CHANNELS = 36,
 487         MFIE_TYPE_CSA = 37,
 488         MFIE_TYPE_MEASURE_REQUEST = 38,
 489         MFIE_TYPE_MEASURE_REPORT = 39,
 490         MFIE_TYPE_QUIET = 40,
 491         MFIE_TYPE_IBSS_DFS = 41,
 492         MFIE_TYPE_ERP_INFO = 42,
 493         MFIE_TYPE_RSN = 48,
 494         MFIE_TYPE_RATES_EX = 50,
 495         MFIE_TYPE_GENERIC = 221,
 496 };
 497
 498 /* Minimal header; can be used for passing 802.11 frames with sufficient
 499  * information to determine what type of underlying data type is actually
 500  * stored in the data. */
 501 struct ieee80211_hdr {
 502         u16 frame_ctl;
 503         u16 duration_id;
 504         u8 payload[0];
 505 } __attribute__ ((packed));
 506
 507 struct ieee80211_hdr_1addr {
 508         u16 frame_ctl;
 509         u16 duration_id;
 510         u8 addr1[ETH_ALEN];
 511         u8 payload[0];
 512 } __attribute__ ((packed));
 513
 514 struct ieee80211_hdr_2addr {
 515         u16 frame_ctl;
 516         u16 duration_id;
 517         u8 addr1[ETH_ALEN];
 518         u8 addr2[ETH_ALEN];
 519         u8 payload[0];
 520 } __attribute__ ((packed));
 521
 522 struct ieee80211_hdr_3addr {
 523         u16 frame_ctl;
 524         u16 duration_id;
 525         u8 addr1[ETH_ALEN];
 526         u8 addr2[ETH_ALEN];
 527         u8 addr3[ETH_ALEN];
 528         u16 seq_ctl;
 529         u8 payload[0];
 530 } __attribute__ ((packed));
 531
 532 struct ieee80211_hdr_4addr {
 533         u16 frame_ctl;
 534         u16 duration_id;
 535         u8 addr1[ETH_ALEN];
 536         u8 addr2[ETH_ALEN];
 537         u8 addr3[ETH_ALEN];
 538         u16 seq_ctl;
 539         u8 addr4[ETH_ALEN];
 540         u8 payload[0];
 541 } __attribute__ ((packed));
 542
 543 struct ieee80211_info_element {
 544         u8 id;
 545         u8 len;
 546         u8 data[0];
 547 } __attribute__ ((packed));
 548
 549 /*
 550  * These are the data types that can make up management packets
 551  *
 552         u16 auth_algorithm;
 553         u16 auth_sequence;
 554         u16 beacon_interval;
 555         u16 capability;
 556         u8 current_ap[ETH_ALEN];
 557         u16 listen_interval;
 558         struct {
 559                 u16 association_id:14, reserved:2;
 560         } __attribute__ ((packed));
 561         u32 time_stamp[2];
 562         u16 reason;
 563         u16 status;
 564 */
 565
 566 struct ieee80211_auth {
 567         struct ieee80211_hdr_3addr header;
 568         __le16 algorithm;
 569         __le16 transaction;
 570         __le16 status;
 571         struct ieee80211_info_element info_element[0];
 572 } __attribute__ ((packed));
 573
 574 struct ieee80211_disassoc {
 575         struct ieee80211_hdr_3addr header;
 576         u16 reason_code;
 577         struct ieee80211_info_element info_element[0];
 578 } __attribute__ ((packed));
 579
 580 struct ieee80211_probe_request {
 581         struct ieee80211_hdr_3addr header;
 582         struct ieee80211_info_element info_element[0];
 583 } __attribute__ ((packed));
 584
 585 struct ieee80211_probe_response {
 586         struct ieee80211_hdr_3addr header;
 587         u32 time_stamp[2];
 588         __le16 beacon_interval;
 589         __le16 capability;
 590         struct ieee80211_info_element info_element[0];
 591 } __attribute__ ((packed));
 592
 593 /* Alias beacon for probe_response */
 594 #define ieee80211_beacon ieee80211_probe_response
 595
 596 struct ieee80211_assoc_request {
 597         struct ieee80211_hdr_3addr header;
 598         u16 capability;
 599         u16 listen_interval;
 600         struct ieee80211_info_element info_element[0];
 601 } __attribute__ ((packed));
 602
 603 struct ieee80211_reassoc_request {
 604         struct ieee80211_hdr_3addr header;
 605         __le16 capability;
 606         __le16 listen_interval;
 607         u8 current_ap[ETH_ALEN];
 608         struct ieee80211_info_element info_element[0];
 609 } __attribute__ ((packed));
 610
 611 struct ieee80211_assoc_response {
 612         struct ieee80211_hdr_3addr header;
 613         __le16 capability;
 614         __le16 status;
 615         __le16 aid;
 616         struct ieee80211_info_element info_element[0];  /* supported rates */
 617 } __attribute__ ((packed));
 618
 619 struct ieee80211_txb {
 620         u8 nr_frags;
 621         u8 encrypted;
 622         u8 rts_included;
 623         u8 reserved;
 624         u16 frag_size;
 625         u16 payload_size;
 626         struct sk_buff *fragments[0];
 627 };
 628
 629 /* SWEEP TABLE ENTRIES NUMBER */
 630 #define MAX_SWEEP_TAB_ENTRIES             42
 631 #define MAX_SWEEP_TAB_ENTRIES_PER_PACKET  7
 632 /* MAX_RATES_LENGTH needs to be 12.  The spec says 8, and many APs
 633  * only use 8, and then use extended rates for the remaining supported
 634  * rates.  Other APs, however, stick all of their supported rates on the
 635  * main rates information element... */
 636 #define MAX_RATES_LENGTH                  ((u8)12)
 637 #define MAX_RATES_EX_LENGTH               ((u8)16)
 638 #define MAX_NETWORK_COUNT                  128
 639
 640 #define CRC_LENGTH                 4U
 641
 642 #define MAX_WPA_IE_LEN 64
 643
 644 #define NETWORK_EMPTY_ESSID (1<<0)
 645 #define NETWORK_HAS_OFDM    (1<<1)
 646 #define NETWORK_HAS_CCK     (1<<2)
 647
 648 struct ieee80211_network {
 649         /* These entries are used to identify a unique network */
 650         u8 bssid[ETH_ALEN];
 651         u8 channel;
 652         /* Ensure null-terminated for any debug msgs */
 653         u8 ssid[IW_ESSID_MAX_SIZE + 1];
 654         u8 ssid_len;
 655
 656         /* These are network statistics */
 657         struct ieee80211_rx_stats stats;
 658         u16 capability;
 659         u8 rates[MAX_RATES_LENGTH];
 660         u8 rates_len;
 661         u8 rates_ex[MAX_RATES_EX_LENGTH];
 662         u8 rates_ex_len;
 663         unsigned long last_scanned;
 664         u8 mode;
 665         u8 flags;
 666         u32 last_associate;
 667         u32 time_stamp[2];
 668         u16 beacon_interval;
 669         u16 listen_interval;
 670         u16 atim_window;
 671         u8 wpa_ie[MAX_WPA_IE_LEN];
 672         size_t wpa_ie_len;
 673         u8 rsn_ie[MAX_WPA_IE_LEN];
 674         size_t rsn_ie_len;
 675         struct list_head list;
 676 };
 677
 678 enum ieee80211_state {
 679         IEEE80211_UNINITIALIZED = 0,
 680         IEEE80211_INITIALIZED,
 681         IEEE80211_ASSOCIATING,
 682         IEEE80211_ASSOCIATED,
 683         IEEE80211_AUTHENTICATING,
 684         IEEE80211_AUTHENTICATED,
 685         IEEE80211_SHUTDOWN
 686 };
 687
 688 #define DEFAULT_MAX_SCAN_AGE (15 * HZ)
 689 #define DEFAULT_FTS 2346
 690
 691 #define CFG_IEEE80211_RESERVE_FCS (1<<0)
 692 #define CFG_IEEE80211_COMPUTE_FCS (1<<1)
 693 #define CFG_IEEE80211_RTS (1<<2)
 694
 695 struct ieee80211_device {
 696         struct net_device *dev;
 697         struct ieee80211_security sec;
 698
 699         /* Bookkeeping structures */
 700         struct net_device_stats stats;
 701         struct ieee80211_stats ieee_stats;
 702
 703         /* Probe / Beacon management */
 704         struct list_head network_free_list;
 705         struct list_head network_list;
 706         struct ieee80211_network *networks;
 707         int scans;
 708         int scan_age;
 709
 710         int iw_mode;            /* operating mode (IW_MODE_*) */
 711         struct iw_spy_data spy_data;    /* iwspy support */
 712
 713         spinlock_t lock;
 714
 715         int tx_headroom;        /* Set to size of any additional room needed at front
 716                                  * of allocated Tx SKBs */
 717         u32 config;
 718
 719         /* WEP and other encryption related settings at the device level */
 720         int open_wep;           /* Set to 1 to allow unencrypted frames */
 721
 722         int reset_on_keychange; /* Set to 1 if the HW needs to be reset on
 723                                  * WEP key changes */
 724
 725         /* If the host performs {en,de}cryption, then set to 1 */
 726         int host_encrypt;
 727         int host_decrypt;
 728         int ieee802_1x;         /* is IEEE 802.1X used */
 729
 730         /* WPA data */
 731         int wpa_enabled;
 732         int drop_unencrypted;
 733         int tkip_countermeasures;
 734         int privacy_invoked;
 735         size_t wpa_ie_len;
 736         u8 *wpa_ie;
 737
 738         struct list_head crypt_deinit_list;
 739         struct ieee80211_crypt_data *crypt[WEP_KEYS];
 740         int tx_keyidx;          /* default TX key index (crypt[tx_keyidx]) */
 741         struct timer_list crypt_deinit_timer;
 742         int crypt_quiesced;
 743
 744         int bcrx_sta_key;       /* use individual keys to override default keys even
 745                                  * with RX of broad/multicast frames */
 746
 747         /* Fragmentation structures */
 748         struct ieee80211_frag_entry frag_cache[IEEE80211_FRAG_CACHE_LEN];
 749         unsigned int frag_next_idx;
 750         u16 fts;                /* Fragmentation Threshold */
 751         u16 rts;                /* RTS threshold */
 752
 753         /* Association info */
 754         u8 bssid[ETH_ALEN];
 755
 756         enum ieee80211_state state;
 757
 758         int mode;               /* A, B, G */
 759         int modulation;         /* CCK, OFDM */
 760         int freq_band;          /* 2.4Ghz, 5.2Ghz, Mixed */
 761         int abg_true;           /* ABG flag              */
 762
 763         int perfect_rssi;
 764         int worst_rssi;
 765
 766         /* Callback functions */
 767         void (*set_security) (struct net_device * dev,
 768                               struct ieee80211_security * sec);
 769         int (*hard_start_xmit) (struct ieee80211_txb * txb,
 770                                 struct net_device * dev);
 771         int (*reset_port) (struct net_device * dev);
 772
 773         /* This must be the last item so that it points to the data
 774          * allocated beyond this structure by alloc_ieee80211 */
 775         u8 priv[0];
 776 };
 777
 778 #define IEEE_A            (1<<0)
 779 #define IEEE_B            (1<<1)
 780 #define IEEE_G            (1<<2)
 781 #define IEEE_MODE_MASK    (IEEE_A|IEEE_B|IEEE_G)
 782
 783 extern inline void *ieee80211_priv(struct net_device *dev)
 784 {
 785         return ((struct ieee80211_device *)netdev_priv(dev))->priv;
 786 }
 787
 788 extern inline int ieee80211_is_empty_essid(const char *essid, int essid_len)
 789 {
 790         /* Single white space is for Linksys APs */
 791         if (essid_len == 1 && essid[0] == ' ')
 792                 return 1;
 793
 794         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 795         while (essid_len) {
 796                 essid_len--;
 797                 if (essid[essid_len] != '\0')
 798                         return 0;
 799         }
 800
 801         return 1;
 802 }
 803
 804 extern inline int ieee80211_is_valid_mode(struct ieee80211_device *ieee,
 805                                           int mode)
 806 {
 807         /*
 808          * It is possible for both access points and our device to support
 809          * combinations of modes, so as long as there is one valid combination
 810          * of ap/device supported modes, then return success
 811          *
 812          */
 813         if ((mode & IEEE_A) &&
 814             (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
 815             (ieee->freq_band & IEEE80211_52GHZ_BAND))
 816                 return 1;
 817
 818         if ((mode & IEEE_G) &&
 819             (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
 820             (ieee->freq_band & IEEE80211_24GHZ_BAND))
 821                 return 1;
 822
 823         if ((mode & IEEE_B) &&
 824             (ieee->modulation & IEEE80211_CCK_MODULATION) &&
 825             (ieee->freq_band & IEEE80211_24GHZ_BAND))
 826                 return 1;
 827
 828         return 0;
 829 }
 830
 831 extern inline int ieee80211_get_hdrlen(u16 fc)
 832 {
 833         int hdrlen = IEEE80211_3ADDR_LEN;
 834
 835         switch (WLAN_FC_GET_TYPE(fc)) {
 836         case IEEE80211_FTYPE_DATA:
 837                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 838                         hdrlen = IEEE80211_4ADDR_LEN;
 839                 break;
 840         case IEEE80211_FTYPE_CTL:
 841                 switch (WLAN_FC_GET_STYPE(fc)) {
 842                 case IEEE80211_STYPE_CTS:
 843                 case IEEE80211_STYPE_ACK:
 844                         hdrlen = IEEE80211_1ADDR_LEN;
 845                         break;
 846                 default:
 847                         hdrlen = IEEE80211_2ADDR_LEN;
 848                         break;
 849                 }
 850                 break;
 851         }
 852
 853         return hdrlen;
 854 }
 855
 856 extern inline u8 *ieee80211_get_payload(struct ieee80211_hdr *hdr)
 857 {
 858         switch (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl))) {
 859         case IEEE80211_1ADDR_LEN:
 860                 return ((struct ieee80211_hdr_1addr *)hdr)->payload;
 861         case IEEE80211_2ADDR_LEN:
 862                 return ((struct ieee80211_hdr_2addr *)hdr)->payload;
 863         case IEEE80211_3ADDR_LEN:
 864                 return ((struct ieee80211_hdr_3addr *)hdr)->payload;
 865         case IEEE80211_4ADDR_LEN:
 866                 return ((struct ieee80211_hdr_4addr *)hdr)->payload;
 867         }
 868
 869 }
 870
 871 /* ieee80211.c */
 872 extern void free_ieee80211(struct net_device *dev);
 873 extern struct net_device *alloc_ieee80211(int sizeof_priv);
 874
 875 extern int ieee80211_set_encryption(struct ieee80211_device *ieee);
 876
 877 /* ieee80211_tx.c */
 878 extern int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev);
 879 extern void ieee80211_txb_free(struct ieee80211_txb *);
 880
 881 /* ieee80211_rx.c */
 882 extern int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 883                         struct ieee80211_rx_stats *rx_stats);
 884 extern void ieee80211_rx_mgt(struct ieee80211_device *ieee,
 885                              struct ieee80211_hdr_4addr *header,
 886                              struct ieee80211_rx_stats *stats);
 887
 888 /* ieee80211_wx.c */
 889 extern int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
 890                                  struct iw_request_info *info,
 891                                  union iwreq_data *wrqu, char *key);
 892 extern int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 893                                    struct iw_request_info *info,
 894                                    union iwreq_data *wrqu, char *key);
 895 extern int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
 896                                    struct iw_request_info *info,
 897                                    union iwreq_data *wrqu, char *key);
 898 #if WIRELESS_EXT > 17
 899 extern int ieee80211_wx_set_encodeext(struct ieee80211_device *ieee,
 900                                       struct iw_request_info *info,
 901                                       union iwreq_data *wrqu, char *extra);
 902 extern int ieee80211_wx_get_encodeext(struct ieee80211_device *ieee,
 903                                       struct iw_request_info *info,
 904                                       union iwreq_data *wrqu, char *extra);
 905 #endif
 906
 907 extern inline void ieee80211_increment_scans(struct ieee80211_device *ieee)
 908 {
 909         ieee->scans++;
 910 }
 911
 912 extern inline int ieee80211_get_scans(struct ieee80211_device *ieee)
 913 {
 914         return ieee->scans;
 915 }
 916
 917 #endif                          /* IEEE80211_H */