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
  37 #define IEEE80211_HLEN                  30
  38 #define IEEE80211_FRAME_LEN             (IEEE80211_DATA_LEN + IEEE80211_HLEN)
  39
  40 struct ieee80211_hdr {
  41         __le16 frame_ctl;
  42         __le16 duration_id;
  43         u8 addr1[ETH_ALEN];
  44         u8 addr2[ETH_ALEN];
  45         u8 addr3[ETH_ALEN];
  46         __le16 seq_ctl;
  47         u8 addr4[ETH_ALEN];
  48 } __attribute__ ((packed));
  49
  50 struct ieee80211_hdr_3addr {
  51         __le16 frame_ctl;
  52         __le16 duration_id;
  53         u8 addr1[ETH_ALEN];
  54         u8 addr2[ETH_ALEN];
  55         u8 addr3[ETH_ALEN];
  56         __le16 seq_ctl;
  57 } __attribute__ ((packed));
  58
  59 #define IEEE80211_1ADDR_LEN 10
  60 #define IEEE80211_2ADDR_LEN 16
  61 #define IEEE80211_3ADDR_LEN 24
  62 #define IEEE80211_4ADDR_LEN 30
  63 #define IEEE80211_FCS_LEN    4
  64
  65 #define MIN_FRAG_THRESHOLD     256U
  66 #define MAX_FRAG_THRESHOLD     2346U
  67
  68 /* Frame control field constants */
  69 #define IEEE80211_FCTL_VERS             0x0003
  70 #define IEEE80211_FCTL_FTYPE            0x000c
  71 #define IEEE80211_FCTL_STYPE            0x00f0
  72 #define IEEE80211_FCTL_TODS             0x0100
  73 #define IEEE80211_FCTL_FROMDS           0x0200
  74 #define IEEE80211_FCTL_MOREFRAGS        0x0400
  75 #define IEEE80211_FCTL_RETRY            0x0800
  76 #define IEEE80211_FCTL_PM               0x1000
  77 #define IEEE80211_FCTL_MOREDATA         0x2000
  78 #define IEEE80211_FCTL_PROTECTED        0x4000
  79 #define IEEE80211_FCTL_ORDER            0x8000
  80
  81 #define IEEE80211_FTYPE_MGMT            0x0000
  82 #define IEEE80211_FTYPE_CTL             0x0004
  83 #define IEEE80211_FTYPE_DATA            0x0008
  84
  85 /* management */
  86 #define IEEE80211_STYPE_ASSOC_REQ       0x0000
  87 #define IEEE80211_STYPE_ASSOC_RESP      0x0010
  88 #define IEEE80211_STYPE_REASSOC_REQ     0x0020
  89 #define IEEE80211_STYPE_REASSOC_RESP    0x0030
  90 #define IEEE80211_STYPE_PROBE_REQ       0x0040
  91 #define IEEE80211_STYPE_PROBE_RESP      0x0050
  92 #define IEEE80211_STYPE_BEACON          0x0080
  93 #define IEEE80211_STYPE_ATIM            0x0090
  94 #define IEEE80211_STYPE_DISASSOC        0x00A0
  95 #define IEEE80211_STYPE_AUTH            0x00B0
  96 #define IEEE80211_STYPE_DEAUTH          0x00C0
  97 #define IEEE80211_STYPE_ACTION          0x00D0
  98
  99 /* control */
 100 #define IEEE80211_STYPE_PSPOLL          0x00A0
 101 #define IEEE80211_STYPE_RTS             0x00B0
 102 #define IEEE80211_STYPE_CTS             0x00C0
 103 #define IEEE80211_STYPE_ACK             0x00D0
 104 #define IEEE80211_STYPE_CFEND           0x00E0
 105 #define IEEE80211_STYPE_CFENDACK        0x00F0
 106
 107 /* data */
 108 #define IEEE80211_STYPE_DATA            0x0000
 109 #define IEEE80211_STYPE_DATA_CFACK      0x0010
 110 #define IEEE80211_STYPE_DATA_CFPOLL     0x0020
 111 #define IEEE80211_STYPE_DATA_CFACKPOLL  0x0030
 112 #define IEEE80211_STYPE_NULLFUNC        0x0040
 113 #define IEEE80211_STYPE_CFACK           0x0050
 114 #define IEEE80211_STYPE_CFPOLL          0x0060
 115 #define IEEE80211_STYPE_CFACKPOLL       0x0070
 116
 117 #define IEEE80211_SCTL_FRAG             0x000F
 118 #define IEEE80211_SCTL_SEQ              0xFFF0
 119
 120
 121 /* debug macros */
 122
 123 #ifdef CONFIG_IEEE80211_DEBUG
 124 extern u32 ieee80211_debug_level;
 125 #define IEEE80211_DEBUG(level, fmt, args...) \
 126 do { if (ieee80211_debug_level & (level)) \
 127   printk(KERN_DEBUG "ieee80211: %c %s " fmt, \
 128          in_interrupt() ? 'I' : 'U', __FUNCTION__ , ## args); } while (0)
 129 #else
 130 #define IEEE80211_DEBUG(level, fmt, args...) do {} while (0)
 131 #endif  /* CONFIG_IEEE80211_DEBUG */
 132
 133
 134 /* debug macros not dependent on CONFIG_IEEE80211_DEBUG */
 135
 136 #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
 137 #define MAC_ARG(x) ((u8*)(x))[0],((u8*)(x))[1],((u8*)(x))[2],((u8*)(x))[3],((u8*)(x))[4],((u8*)(x))[5]
 138
 139 /* escape_essid() is intended to be used in debug (and possibly error)
 140  * messages. It should never be used for passing essid to user space. */
 141 const char *escape_essid(const char *essid, u8 essid_len);
 142
 143
 144 /*
 145  * To use the debug system:
 146  *
 147  * If you are defining a new debug classification, simply add it to the #define
 148  * list here in the form of:
 149  *
 150  * #define IEEE80211_DL_xxxx VALUE
 151  *
 152  * shifting value to the left one bit from the previous entry.  xxxx should be
 153  * the name of the classification (for example, WEP)
 154  *
 155  * You then need to either add a IEEE80211_xxxx_DEBUG() macro definition for your
 156  * classification, or use IEEE80211_DEBUG(IEEE80211_DL_xxxx, ...) whenever you want
 157  * to send output to that classification.
 158  *
 159  * To add your debug level to the list of levels seen when you perform
 160  *
 161  * % cat /proc/net/ieee80211/debug_level
 162  *
 163  * you simply need to add your entry to the ieee80211_debug_level array.
 164  *
 165  * If you do not see debug_level in /proc/net/ieee80211 then you do not have
 166  * CONFIG_IEEE80211_DEBUG defined in your kernel configuration
 167  *
 168  */
 169
 170 #define IEEE80211_DL_INFO          (1<<0)
 171 #define IEEE80211_DL_WX            (1<<1)
 172 #define IEEE80211_DL_SCAN          (1<<2)
 173 #define IEEE80211_DL_STATE         (1<<3)
 174 #define IEEE80211_DL_MGMT          (1<<4)
 175 #define IEEE80211_DL_FRAG          (1<<5)
 176 #define IEEE80211_DL_DROP          (1<<7)
 177
 178 #define IEEE80211_DL_TX            (1<<8)
 179 #define IEEE80211_DL_RX            (1<<9)
 180
 181 #define IEEE80211_ERROR(f, a...) printk(KERN_ERR "ieee80211: " f, ## a)
 182 #define IEEE80211_WARNING(f, a...) printk(KERN_WARNING "ieee80211: " f, ## a)
 183 #define IEEE80211_DEBUG_INFO(f, a...)   IEEE80211_DEBUG(IEEE80211_DL_INFO, f, ## a)
 184
 185 #define IEEE80211_DEBUG_WX(f, a...)     IEEE80211_DEBUG(IEEE80211_DL_WX, f, ## a)
 186 #define IEEE80211_DEBUG_SCAN(f, a...)   IEEE80211_DEBUG(IEEE80211_DL_SCAN, f, ## a)
 187 #define IEEE80211_DEBUG_STATE(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_STATE, f, ## a)
 188 #define IEEE80211_DEBUG_MGMT(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_MGMT, f, ## a)
 189 #define IEEE80211_DEBUG_FRAG(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_FRAG, f, ## a)
 190 #define IEEE80211_DEBUG_DROP(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_DROP, f, ## a)
 191 #define IEEE80211_DEBUG_TX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_TX, f, ## a)
 192 #define IEEE80211_DEBUG_RX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_RX, f, ## a)
 193 #include <linux/netdevice.h>
 194 #include <linux/wireless.h>
 195 #include <linux/if_arp.h> /* ARPHRD_ETHER */
 196
 197 #ifndef WIRELESS_SPY
 198 #define WIRELESS_SPY            /* enable iwspy support */
 199 #endif
 200 #include <net/iw_handler.h>     /* new driver API */
 201
 202 #ifndef ETH_P_PAE
 203 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
 204 #endif /* ETH_P_PAE */
 205
 206 #define ETH_P_PREAUTH 0x88C7 /* IEEE 802.11i pre-authentication */
 207
 208 #ifndef ETH_P_80211_RAW
 209 #define ETH_P_80211_RAW (ETH_P_ECONET + 1)
 210 #endif
 211
 212 /* IEEE 802.11 defines */
 213
 214 #define P80211_OUI_LEN 3
 215
 216 struct ieee80211_snap_hdr {
 217
 218         u8    dsap;   /* always 0xAA */
 219         u8    ssap;   /* always 0xAA */
 220         u8    ctrl;   /* always 0x03 */
 221         u8    oui[P80211_OUI_LEN];    /* organizational universal id */
 222
 223 } __attribute__ ((packed));
 224
 225 #define SNAP_SIZE sizeof(struct ieee80211_snap_hdr)
 226
 227 #define WLAN_FC_GET_VERS(fc) ((fc) & IEEE80211_FCTL_VERS)
 228 #define WLAN_FC_GET_TYPE(fc) ((fc) & IEEE80211_FCTL_FTYPE)
 229 #define WLAN_FC_GET_STYPE(fc) ((fc) & IEEE80211_FCTL_STYPE)
 230
 231 #define WLAN_GET_SEQ_FRAG(seq) ((seq) & IEEE80211_SCTL_FRAG)
 232 #define WLAN_GET_SEQ_SEQ(seq)  ((seq) & IEEE80211_SCTL_SEQ)
 233
 234 /* Authentication algorithms */
 235 #define WLAN_AUTH_OPEN 0
 236 #define WLAN_AUTH_SHARED_KEY 1
 237
 238 #define WLAN_AUTH_CHALLENGE_LEN 128
 239
 240 #define WLAN_CAPABILITY_ESS (1<<0)
 241 #define WLAN_CAPABILITY_IBSS (1<<1)
 242 #define WLAN_CAPABILITY_CF_POLLABLE (1<<2)
 243 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
 244 #define WLAN_CAPABILITY_PRIVACY (1<<4)
 245 #define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
 246 #define WLAN_CAPABILITY_PBCC (1<<6)
 247 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
 248 #define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8)
 249 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
 250 #define WLAN_CAPABILITY_OSSS_OFDM (1<<13)
 251
 252 /* Status codes */
 253 enum ieee80211_statuscode {
 254         WLAN_STATUS_SUCCESS = 0,
 255         WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
 256         WLAN_STATUS_CAPS_UNSUPPORTED = 10,
 257         WLAN_STATUS_REASSOC_NO_ASSOC = 11,
 258         WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
 259         WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
 260         WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
 261         WLAN_STATUS_CHALLENGE_FAIL = 15,
 262         WLAN_STATUS_AUTH_TIMEOUT = 16,
 263         WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
 264         WLAN_STATUS_ASSOC_DENIED_RATES = 18,
 265         /* 802.11b */
 266         WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
 267         WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
 268         WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
 269         /* 802.11h */
 270         WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
 271         WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
 272         WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
 273         /* 802.11g */
 274         WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
 275         WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
 276         /* 802.11i */
 277         WLAN_STATUS_INVALID_IE = 40,
 278         WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
 279         WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
 280         WLAN_STATUS_INVALID_AKMP = 43,
 281         WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
 282         WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
 283         WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
 284 };
 285
 286 /* Reason codes */
 287 enum ieee80211_reasoncode {
 288         WLAN_REASON_UNSPECIFIED = 1,
 289         WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
 290         WLAN_REASON_DEAUTH_LEAVING = 3,
 291         WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
 292         WLAN_REASON_DISASSOC_AP_BUSY = 5,
 293         WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
 294         WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
 295         WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
 296         WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
 297         /* 802.11h */
 298         WLAN_REASON_DISASSOC_BAD_POWER = 10,
 299         WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
 300         /* 802.11i */
 301         WLAN_REASON_INVALID_IE = 13,
 302         WLAN_REASON_MIC_FAILURE = 14,
 303         WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
 304         WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
 305         WLAN_REASON_IE_DIFFERENT = 17,
 306         WLAN_REASON_INVALID_GROUP_CIPHER = 18,
 307         WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
 308         WLAN_REASON_INVALID_AKMP = 20,
 309         WLAN_REASON_UNSUPP_RSN_VERSION = 21,
 310         WLAN_REASON_INVALID_RSN_IE_CAP = 22,
 311         WLAN_REASON_IEEE8021X_FAILED = 23,
 312         WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
 313 };
 314
 315
 316 #define IEEE80211_STATMASK_SIGNAL (1<<0)
 317 #define IEEE80211_STATMASK_RSSI (1<<1)
 318 #define IEEE80211_STATMASK_NOISE (1<<2)
 319 #define IEEE80211_STATMASK_RATE (1<<3)
 320 #define IEEE80211_STATMASK_WEMASK 0x7
 321
 322
 323 #define IEEE80211_CCK_MODULATION    (1<<0)
 324 #define IEEE80211_OFDM_MODULATION   (1<<1)
 325
 326 #define IEEE80211_24GHZ_BAND     (1<<0)
 327 #define IEEE80211_52GHZ_BAND     (1<<1)
 328
 329 #define IEEE80211_CCK_RATE_1MB                  0x02
 330 #define IEEE80211_CCK_RATE_2MB                  0x04
 331 #define IEEE80211_CCK_RATE_5MB                  0x0B
 332 #define IEEE80211_CCK_RATE_11MB                 0x16
 333 #define IEEE80211_OFDM_RATE_6MB                 0x0C
 334 #define IEEE80211_OFDM_RATE_9MB                 0x12
 335 #define IEEE80211_OFDM_RATE_12MB                0x18
 336 #define IEEE80211_OFDM_RATE_18MB                0x24
 337 #define IEEE80211_OFDM_RATE_24MB                0x30
 338 #define IEEE80211_OFDM_RATE_36MB                0x48
 339 #define IEEE80211_OFDM_RATE_48MB                0x60
 340 #define IEEE80211_OFDM_RATE_54MB                0x6C
 341 #define IEEE80211_BASIC_RATE_MASK               0x80
 342
 343 #define IEEE80211_CCK_RATE_1MB_MASK             (1<<0)
 344 #define IEEE80211_CCK_RATE_2MB_MASK             (1<<1)
 345 #define IEEE80211_CCK_RATE_5MB_MASK             (1<<2)
 346 #define IEEE80211_CCK_RATE_11MB_MASK            (1<<3)
 347 #define IEEE80211_OFDM_RATE_6MB_MASK            (1<<4)
 348 #define IEEE80211_OFDM_RATE_9MB_MASK            (1<<5)
 349 #define IEEE80211_OFDM_RATE_12MB_MASK           (1<<6)
 350 #define IEEE80211_OFDM_RATE_18MB_MASK           (1<<7)
 351 #define IEEE80211_OFDM_RATE_24MB_MASK           (1<<8)
 352 #define IEEE80211_OFDM_RATE_36MB_MASK           (1<<9)
 353 #define IEEE80211_OFDM_RATE_48MB_MASK           (1<<10)
 354 #define IEEE80211_OFDM_RATE_54MB_MASK           (1<<11)
 355
 356 #define IEEE80211_CCK_RATES_MASK                0x0000000F
 357 #define IEEE80211_CCK_BASIC_RATES_MASK  (IEEE80211_CCK_RATE_1MB_MASK | \
 358         IEEE80211_CCK_RATE_2MB_MASK)
 359 #define IEEE80211_CCK_DEFAULT_RATES_MASK        (IEEE80211_CCK_BASIC_RATES_MASK | \
 360         IEEE80211_CCK_RATE_5MB_MASK | \
 361         IEEE80211_CCK_RATE_11MB_MASK)
 362
 363 #define IEEE80211_OFDM_RATES_MASK               0x00000FF0
 364 #define IEEE80211_OFDM_BASIC_RATES_MASK (IEEE80211_OFDM_RATE_6MB_MASK | \
 365         IEEE80211_OFDM_RATE_12MB_MASK | \
 366         IEEE80211_OFDM_RATE_24MB_MASK)
 367 #define IEEE80211_OFDM_DEFAULT_RATES_MASK       (IEEE80211_OFDM_BASIC_RATES_MASK | \
 368         IEEE80211_OFDM_RATE_9MB_MASK  | \
 369         IEEE80211_OFDM_RATE_18MB_MASK | \
 370         IEEE80211_OFDM_RATE_36MB_MASK | \
 371         IEEE80211_OFDM_RATE_48MB_MASK | \
 372         IEEE80211_OFDM_RATE_54MB_MASK)
 373 #define IEEE80211_DEFAULT_RATES_MASK (IEEE80211_OFDM_DEFAULT_RATES_MASK | \
 374                                 IEEE80211_CCK_DEFAULT_RATES_MASK)
 375
 376 #define IEEE80211_NUM_OFDM_RATES            8
 377 #define IEEE80211_NUM_CCK_RATES             4
 378 #define IEEE80211_OFDM_SHIFT_MASK_A         4
 379
 380
 381
 382
 383 /* NOTE: This data is for statistical purposes; not all hardware provides this
 384  *       information for frames received.  Not setting these will not cause
 385  *       any adverse affects. */
 386 struct ieee80211_rx_stats {
 387         u32 mac_time;
 388         s8 rssi;
 389         u8 signal;
 390         u8 noise;
 391         u16 rate; /* in 100 kbps */
 392         u8 received_channel;
 393         u8 control;
 394         u8 mask;
 395         u8 freq;
 396         u16 len;
 397 };
 398
 399 /* IEEE 802.11 requires that STA supports concurrent reception of at least
 400  * three fragmented frames. This define can be increased to support more
 401  * concurrent frames, but it should be noted that each entry can consume about
 402  * 2 kB of RAM and increasing cache size will slow down frame reassembly. */
 403 #define IEEE80211_FRAG_CACHE_LEN 4
 404
 405 struct ieee80211_frag_entry {
 406         unsigned long first_frag_time;
 407         unsigned int seq;
 408         unsigned int last_frag;
 409         struct sk_buff *skb;
 410         u8 src_addr[ETH_ALEN];
 411         u8 dst_addr[ETH_ALEN];
 412 };
 413
 414 struct ieee80211_stats {
 415         unsigned int tx_unicast_frames;
 416         unsigned int tx_multicast_frames;
 417         unsigned int tx_fragments;
 418         unsigned int tx_unicast_octets;
 419         unsigned int tx_multicast_octets;
 420         unsigned int tx_deferred_transmissions;
 421         unsigned int tx_single_retry_frames;
 422         unsigned int tx_multiple_retry_frames;
 423         unsigned int tx_retry_limit_exceeded;
 424         unsigned int tx_discards;
 425         unsigned int rx_unicast_frames;
 426         unsigned int rx_multicast_frames;
 427         unsigned int rx_fragments;
 428         unsigned int rx_unicast_octets;
 429         unsigned int rx_multicast_octets;
 430         unsigned int rx_fcs_errors;
 431         unsigned int rx_discards_no_buffer;
 432         unsigned int tx_discards_wrong_sa;
 433         unsigned int rx_discards_undecryptable;
 434         unsigned int rx_message_in_msg_fragments;
 435         unsigned int rx_message_in_bad_msg_fragments;
 436 };
 437
 438 struct ieee80211_device;
 439
 440 #include "ieee80211_crypt.h"
 441
 442 #define SEC_KEY_1         (1<<0)
 443 #define SEC_KEY_2         (1<<1)
 444 #define SEC_KEY_3         (1<<2)
 445 #define SEC_KEY_4         (1<<3)
 446 #define SEC_ACTIVE_KEY    (1<<4)
 447 #define SEC_AUTH_MODE     (1<<5)
 448 #define SEC_UNICAST_GROUP (1<<6)
 449 #define SEC_LEVEL         (1<<7)
 450 #define SEC_ENABLED       (1<<8)
 451
 452 #define SEC_LEVEL_0      0 /* None */
 453 #define SEC_LEVEL_1      1 /* WEP 40 and 104 bit */
 454 #define SEC_LEVEL_2      2 /* Level 1 + TKIP */
 455 #define SEC_LEVEL_2_CKIP 3 /* Level 1 + CKIP */
 456 #define SEC_LEVEL_3      4 /* Level 2 + CCMP */
 457
 458 #define WEP_KEYS 4
 459 #define WEP_KEY_LEN 13
 460
 461 struct ieee80211_security {
 462         u16 active_key:2,
 463             enabled:1,
 464             auth_mode:2,
 465             auth_algo:4,
 466             unicast_uses_group:1;
 467         u8 key_sizes[WEP_KEYS];
 468         u8 keys[WEP_KEYS][WEP_KEY_LEN];
 469         u8 level;
 470         u16 flags;
 471 } __attribute__ ((packed));
 472
 473
 474 /*
 475
 476  802.11 data frame from AP
 477
 478       ,-------------------------------------------------------------------.
 479 Bytes |  2   |  2   |    6    |    6    |    6    |  2   | 0..2312 |   4  |
 480       |------|------|---------|---------|---------|------|---------|------|
 481 Desc. | ctrl | dura |  DA/RA  |   TA    |    SA   | Sequ |  frame  |  fcs |
 482       |      | tion | (BSSID) |         |         | ence |  data   |      |
 483       `-------------------------------------------------------------------'
 484
 485 Total: 28-2340 bytes
 486
 487 */
 488
 489 #define BEACON_PROBE_SSID_ID_POSITION 12
 490
 491 /* Management Frame Information Element Types */
 492 enum ieee80211_mfie {
 493         MFIE_TYPE_SSID = 0,
 494         MFIE_TYPE_RATES = 1,
 495         MFIE_TYPE_FH_SET = 2,
 496         MFIE_TYPE_DS_SET = 3,
 497         MFIE_TYPE_CF_SET =  4,
 498         MFIE_TYPE_TIM = 5,
 499         MFIE_TYPE_IBSS_SET = 6,
 500         MFIE_TYPE_COUNTRY = 7,
 501         MFIE_TYPE_HOP_PARAMS = 8,
 502         MFIE_TYPE_HOP_TABLE = 9,
 503         MFIE_TYPE_REQUEST = 10,
 504         MFIE_TYPE_CHALLENGE = 16,
 505         MFIE_TYPE_POWER_CONSTRAINT = 32,
 506         MFIE_TYPE_POWER_CAPABILITY = 33,
 507         MFIE_TYPE_TPC_REQUEST = 34,
 508         MFIE_TYPE_TPC_REPORT = 35,
 509         MFIE_TYPE_SUPP_CHANNELS = 36,
 510         MFIE_TYPE_CSA = 37,
 511         MFIE_TYPE_MEASURE_REQUEST = 38,
 512         MFIE_TYPE_MEASURE_REPORT = 39,
 513         MFIE_TYPE_QUIET = 40,
 514         MFIE_TYPE_IBSS_DFS = 41,
 515         MFIE_TYPE_ERP_INFO = 42,
 516         MFIE_TYPE_RSN = 48,
 517         MFIE_TYPE_RATES_EX = 50,
 518         MFIE_TYPE_GENERIC = 221,
 519 };
 520
 521 struct ieee80211_info_element_hdr {
 522         u8 id;
 523         u8 len;
 524 } __attribute__ ((packed));
 525
 526 struct ieee80211_info_element {
 527         u8 id;
 528         u8 len;
 529         u8 data[0];
 530 } __attribute__ ((packed));
 531
 532 /*
 533  * These are the data types that can make up management packets
 534  *
 535         u16 auth_algorithm;
 536         u16 auth_sequence;
 537         u16 beacon_interval;
 538         u16 capability;
 539         u8 current_ap[ETH_ALEN];
 540         u16 listen_interval;
 541         struct {
 542                 u16 association_id:14, reserved:2;
 543         } __attribute__ ((packed));
 544         u32 time_stamp[2];
 545         u16 reason;
 546         u16 status;
 547 */
 548
 549 struct ieee80211_authentication {
 550         struct ieee80211_hdr_3addr header;
 551         __le16 algorithm;
 552         __le16 transaction;
 553         __le16 status;
 554         struct ieee80211_info_element info_element;
 555 } __attribute__ ((packed));
 556
 557
 558 struct ieee80211_probe_response {
 559         struct ieee80211_hdr_3addr header;
 560         u32 time_stamp[2];
 561         __le16 beacon_interval;
 562         __le16 capability;
 563         struct ieee80211_info_element info_element;
 564 } __attribute__ ((packed));
 565
 566 struct ieee80211_assoc_request_frame {
 567         __le16 capability;
 568         __le16 listen_interval;
 569         u8 current_ap[ETH_ALEN];
 570         struct ieee80211_info_element info_element;
 571 } __attribute__ ((packed));
 572
 573 struct ieee80211_assoc_response_frame {
 574         struct ieee80211_hdr_3addr header;
 575         __le16 capability;
 576         __le16 status;
 577         __le16 aid;
 578         struct ieee80211_info_element info_element; /* supported rates */
 579 } __attribute__ ((packed));
 580
 581
 582 struct ieee80211_txb {
 583         u8 nr_frags;
 584         u8 encrypted;
 585         u16 reserved;
 586         u16 frag_size;
 587         u16 payload_size;
 588         struct sk_buff *fragments[0];
 589 };
 590
 591
 592 /* SWEEP TABLE ENTRIES NUMBER */
 593 #define MAX_SWEEP_TAB_ENTRIES             42
 594 #define MAX_SWEEP_TAB_ENTRIES_PER_PACKET  7
 595 /* MAX_RATES_LENGTH needs to be 12.  The spec says 8, and many APs
 596  * only use 8, and then use extended rates for the remaining supported
 597  * rates.  Other APs, however, stick all of their supported rates on the
 598  * main rates information element... */
 599 #define MAX_RATES_LENGTH                  ((u8)12)
 600 #define MAX_RATES_EX_LENGTH               ((u8)16)
 601 #define MAX_NETWORK_COUNT                  128
 602
 603 #define CRC_LENGTH                 4U
 604
 605 #define MAX_WPA_IE_LEN 64
 606
 607 #define NETWORK_EMPTY_ESSID (1<<0)
 608 #define NETWORK_HAS_OFDM    (1<<1)
 609 #define NETWORK_HAS_CCK     (1<<2)
 610
 611 struct ieee80211_network {
 612         /* These entries are used to identify a unique network */
 613         u8 bssid[ETH_ALEN];
 614         u8 channel;
 615         /* Ensure null-terminated for any debug msgs */
 616         u8 ssid[IW_ESSID_MAX_SIZE + 1];
 617         u8 ssid_len;
 618
 619         /* These are network statistics */
 620         struct ieee80211_rx_stats stats;
 621         u16 capability;
 622         u8 rates[MAX_RATES_LENGTH];
 623         u8 rates_len;
 624         u8 rates_ex[MAX_RATES_EX_LENGTH];
 625         u8 rates_ex_len;
 626         unsigned long last_scanned;
 627         u8 mode;
 628         u8 flags;
 629         u32 last_associate;
 630         u32 time_stamp[2];
 631         u16 beacon_interval;
 632         u16 listen_interval;
 633         u16 atim_window;
 634         u8 wpa_ie[MAX_WPA_IE_LEN];
 635         size_t wpa_ie_len;
 636         u8 rsn_ie[MAX_WPA_IE_LEN];
 637         size_t rsn_ie_len;
 638         struct list_head list;
 639 };
 640
 641 enum ieee80211_state {
 642         IEEE80211_UNINITIALIZED = 0,
 643         IEEE80211_INITIALIZED,
 644         IEEE80211_ASSOCIATING,
 645         IEEE80211_ASSOCIATED,
 646         IEEE80211_AUTHENTICATING,
 647         IEEE80211_AUTHENTICATED,
 648         IEEE80211_SHUTDOWN
 649 };
 650
 651 #define DEFAULT_MAX_SCAN_AGE (15 * HZ)
 652 #define DEFAULT_FTS 2346
 653
 654
 655 #define CFG_IEEE80211_RESERVE_FCS (1<<0)
 656 #define CFG_IEEE80211_COMPUTE_FCS (1<<1)
 657
 658 struct ieee80211_device {
 659         struct net_device *dev;
 660
 661         /* Bookkeeping structures */
 662         struct net_device_stats stats;
 663         struct ieee80211_stats ieee_stats;
 664
 665         /* Probe / Beacon management */
 666         struct list_head network_free_list;
 667         struct list_head network_list;
 668         struct ieee80211_network *networks;
 669         int scans;
 670         int scan_age;
 671
 672         int iw_mode; /* operating mode (IW_MODE_*) */
 673
 674         spinlock_t lock;
 675
 676         int tx_headroom; /* Set to size of any additional room needed at front
 677                           * of allocated Tx SKBs */
 678         u32 config;
 679
 680         /* WEP and other encryption related settings at the device level */
 681         int open_wep; /* Set to 1 to allow unencrypted frames */
 682
 683         int reset_on_keychange; /* Set to 1 if the HW needs to be reset on
 684                                  * WEP key changes */
 685
 686         /* If the host performs {en,de}cryption, then set to 1 */
 687         int host_encrypt;
 688         int host_decrypt;
 689         int ieee802_1x; /* is IEEE 802.1X used */
 690
 691         /* WPA data */
 692         int wpa_enabled;
 693         int drop_unencrypted;
 694         int tkip_countermeasures;
 695         int privacy_invoked;
 696         size_t wpa_ie_len;
 697         u8 *wpa_ie;
 698
 699         struct list_head crypt_deinit_list;
 700         struct ieee80211_crypt_data *crypt[WEP_KEYS];
 701         int tx_keyidx; /* default TX key index (crypt[tx_keyidx]) */
 702         struct timer_list crypt_deinit_timer;
 703
 704         int bcrx_sta_key; /* use individual keys to override default keys even
 705                            * with RX of broad/multicast frames */
 706
 707         /* Fragmentation structures */
 708         struct ieee80211_frag_entry frag_cache[IEEE80211_FRAG_CACHE_LEN];
 709         unsigned int frag_next_idx;
 710         u16 fts; /* Fragmentation Threshold */
 711
 712         /* Association info */
 713         u8 bssid[ETH_ALEN];
 714
 715         enum ieee80211_state state;
 716
 717         int mode;       /* A, B, G */
 718         int modulation; /* CCK, OFDM */
 719         int freq_band;  /* 2.4Ghz, 5.2Ghz, Mixed */
 720         int abg_ture;   /* ABG flag              */
 721
 722         /* Callback functions */
 723         void (*set_security)(struct net_device *dev,
 724                              struct ieee80211_security *sec);
 725         int (*hard_start_xmit)(struct ieee80211_txb *txb,
 726                                struct net_device *dev);
 727         int (*reset_port)(struct net_device *dev);
 728
 729         /* This must be the last item so that it points to the data
 730          * allocated beyond this structure by alloc_ieee80211 */
 731         u8 priv[0];
 732 };
 733
 734 #define IEEE_A            (1<<0)
 735 #define IEEE_B            (1<<1)
 736 #define IEEE_G            (1<<2)
 737 #define IEEE_MODE_MASK    (IEEE_A|IEEE_B|IEEE_G)
 738
 739 extern inline void *ieee80211_priv(struct net_device *dev)
 740 {
 741         return ((struct ieee80211_device *)netdev_priv(dev))->priv;
 742 }
 743
 744 extern inline int ieee80211_is_empty_essid(const char *essid, int essid_len)
 745 {
 746         /* Single white space is for Linksys APs */
 747         if (essid_len == 1 && essid[0] == ' ')
 748                 return 1;
 749
 750         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 751         while (essid_len) {
 752                 essid_len--;
 753                 if (essid[essid_len] != '\0')
 754                         return 0;
 755         }
 756
 757         return 1;
 758 }
 759
 760 extern inline int ieee80211_is_valid_mode(struct ieee80211_device *ieee, int mode)
 761 {
 762         /*
 763          * It is possible for both access points and our device to support
 764          * combinations of modes, so as long as there is one valid combination
 765          * of ap/device supported modes, then return success
 766          *
 767          */
 768         if ((mode & IEEE_A) &&
 769             (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
 770             (ieee->freq_band & IEEE80211_52GHZ_BAND))
 771                 return 1;
 772
 773         if ((mode & IEEE_G) &&
 774             (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
 775             (ieee->freq_band & IEEE80211_24GHZ_BAND))
 776                 return 1;
 777
 778         if ((mode & IEEE_B) &&
 779             (ieee->modulation & IEEE80211_CCK_MODULATION) &&
 780             (ieee->freq_band & IEEE80211_24GHZ_BAND))
 781                 return 1;
 782
 783         return 0;
 784 }
 785
 786 extern inline int ieee80211_get_hdrlen(u16 fc)
 787 {
 788         int hdrlen = IEEE80211_3ADDR_LEN;
 789
 790         switch (WLAN_FC_GET_TYPE(fc)) {
 791         case IEEE80211_FTYPE_DATA:
 792                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 793                         hdrlen = IEEE80211_4ADDR_LEN;
 794                 break;
 795         case IEEE80211_FTYPE_CTL:
 796                 switch (WLAN_FC_GET_STYPE(fc)) {
 797                 case IEEE80211_STYPE_CTS:
 798                 case IEEE80211_STYPE_ACK:
 799                         hdrlen = IEEE80211_1ADDR_LEN;
 800                         break;
 801                 default:
 802                         hdrlen = IEEE80211_2ADDR_LEN;
 803                         break;
 804                 }
 805                 break;
 806         }
 807
 808         return hdrlen;
 809 }
 810
 811
 812
 813 /* ieee80211.c */
 814 extern void free_ieee80211(struct net_device *dev);
 815 extern struct net_device *alloc_ieee80211(int sizeof_priv);
 816
 817 extern int ieee80211_set_encryption(struct ieee80211_device *ieee);
 818
 819 /* ieee80211_tx.c */
 820 extern int ieee80211_xmit(struct sk_buff *skb,
 821                           struct net_device *dev);
 822 extern void ieee80211_txb_free(struct ieee80211_txb *);
 823
 824
 825 /* ieee80211_rx.c */
 826 extern int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 827                         struct ieee80211_rx_stats *rx_stats);
 828 extern void ieee80211_rx_mgt(struct ieee80211_device *ieee,
 829                              struct ieee80211_hdr *header,
 830                              struct ieee80211_rx_stats *stats);
 831
 832 /* ieee80211_wx.c */
 833 extern int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
 834                                  struct iw_request_info *info,
 835                                  union iwreq_data *wrqu, char *key);
 836 extern int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 837                                    struct iw_request_info *info,
 838                                    union iwreq_data *wrqu, char *key);
 839 extern int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
 840                                    struct iw_request_info *info,
 841                                    union iwreq_data *wrqu, char *key);
 842
 843
 844 extern inline void ieee80211_increment_scans(struct ieee80211_device *ieee)
 845 {
 846         ieee->scans++;
 847 }
 848
 849 extern inline int ieee80211_get_scans(struct ieee80211_device *ieee)
 850 {
 851         return ieee->scans;
 852 }
 853
 854
 855 #endif /* IEEE80211_H */