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 #if WIRELESS_EXT < 17
  28 #define IW_QUAL_QUAL_INVALID   0x10
  29 #define IW_QUAL_LEVEL_INVALID  0x20
  30 #define IW_QUAL_NOISE_INVALID  0x40
  31 #define IW_QUAL_QUAL_UPDATED   0x1
  32 #define IW_QUAL_LEVEL_UPDATED  0x2
  33 #define IW_QUAL_NOISE_UPDATED  0x4
  34 #endif
  35
  36 #define IEEE80211_DATA_LEN              2304
  37 /* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
  38    6.2.1.1.2.
  39
  40    The figure in section 7.1.2 suggests a body size of up to 2312
  41    bytes is allowed, which is a bit confusing, I suspect this
  42    represents the 2304 bytes of real data, plus a possible 8 bytes of
  43    WEP IV and ICV. (this interpretation suggested by Ramiro Barreiro) */
  44
  45
  46 #define IEEE80211_HLEN                  30
  47 #define IEEE80211_FRAME_LEN             (IEEE80211_DATA_LEN + IEEE80211_HLEN)
  48
  49 struct ieee80211_hdr {
  50         u16 frame_ctl;
  51         u16 duration_id;
  52         u8 addr1[ETH_ALEN];
  53         u8 addr2[ETH_ALEN];
  54         u8 addr3[ETH_ALEN];
  55         u16 seq_ctl;
  56         u8 addr4[ETH_ALEN];
  57 } __attribute__ ((packed));
  58
  59 struct ieee80211_hdr_3addr {
  60         u16 frame_ctl;
  61         u16 duration_id;
  62         u8 addr1[ETH_ALEN];
  63         u8 addr2[ETH_ALEN];
  64         u8 addr3[ETH_ALEN];
  65         u16 seq_ctl;
  66 } __attribute__ ((packed));
  67
  68 enum eap_type {
  69         EAP_PACKET = 0,
  70         EAPOL_START,
  71         EAPOL_LOGOFF,
  72         EAPOL_KEY,
  73         EAPOL_ENCAP_ASF_ALERT
  74 };
  75
  76 static const char *eap_types[] = {
  77         [EAP_PACKET]            = "EAP-Packet",
  78         [EAPOL_START]           = "EAPOL-Start",
  79         [EAPOL_LOGOFF]          = "EAPOL-Logoff",
  80         [EAPOL_KEY]             = "EAPOL-Key",
  81         [EAPOL_ENCAP_ASF_ALERT] = "EAPOL-Encap-ASF-Alert"
  82 };
  83
  84 static inline const char *eap_get_type(int type)
  85 {
  86         return (type >= ARRAY_SIZE(eap_types)) ? "Unknown" : eap_types[type];
  87 }
  88
  89 struct eapol {
  90         u8 snap[6];
  91         u16 ethertype;
  92         u8 version;
  93         u8 type;
  94         u16 length;
  95 } __attribute__ ((packed));
  96
  97 #define IEEE80211_1ADDR_LEN 10
  98 #define IEEE80211_2ADDR_LEN 16
  99 #define IEEE80211_3ADDR_LEN 24
 100 #define IEEE80211_4ADDR_LEN 30
 101 #define IEEE80211_FCS_LEN    4
 102
 103 #define MIN_FRAG_THRESHOLD     256U
 104 #define MAX_FRAG_THRESHOLD     2346U
 105
 106 /* Frame control field constants */
 107 #define IEEE80211_FCTL_VERS             0x0003
 108 #define IEEE80211_FCTL_FTYPE            0x000c
 109 #define IEEE80211_FCTL_STYPE            0x00f0
 110 #define IEEE80211_FCTL_TODS             0x0100
 111 #define IEEE80211_FCTL_FROMDS           0x0200
 112 #define IEEE80211_FCTL_MOREFRAGS        0x0400
 113 #define IEEE80211_FCTL_RETRY            0x0800
 114 #define IEEE80211_FCTL_PM               0x1000
 115 #define IEEE80211_FCTL_MOREDATA 0x2000
 116 #define IEEE80211_FCTL_WEP              0x4000
 117 #define IEEE80211_FCTL_ORDER            0x8000
 118
 119 #define IEEE80211_FTYPE_MGMT            0x0000
 120 #define IEEE80211_FTYPE_CTL             0x0004
 121 #define IEEE80211_FTYPE_DATA            0x0008
 122
 123 /* management */
 124 #define IEEE80211_STYPE_ASSOC_REQ       0x0000
 125 #define IEEE80211_STYPE_ASSOC_RESP      0x0010
 126 #define IEEE80211_STYPE_REASSOC_REQ     0x0020
 127 #define IEEE80211_STYPE_REASSOC_RESP    0x0030
 128 #define IEEE80211_STYPE_PROBE_REQ       0x0040
 129 #define IEEE80211_STYPE_PROBE_RESP      0x0050
 130 #define IEEE80211_STYPE_BEACON          0x0080
 131 #define IEEE80211_STYPE_ATIM            0x0090
 132 #define IEEE80211_STYPE_DISASSOC        0x00A0
 133 #define IEEE80211_STYPE_AUTH            0x00B0
 134 #define IEEE80211_STYPE_DEAUTH          0x00C0
 135
 136 /* control */
 137 #define IEEE80211_STYPE_PSPOLL          0x00A0
 138 #define IEEE80211_STYPE_RTS             0x00B0
 139 #define IEEE80211_STYPE_CTS             0x00C0
 140 #define IEEE80211_STYPE_ACK             0x00D0
 141 #define IEEE80211_STYPE_CFEND           0x00E0
 142 #define IEEE80211_STYPE_CFENDACK        0x00F0
 143
 144 /* data */
 145 #define IEEE80211_STYPE_DATA            0x0000
 146 #define IEEE80211_STYPE_DATA_CFACK      0x0010
 147 #define IEEE80211_STYPE_DATA_CFPOLL     0x0020
 148 #define IEEE80211_STYPE_DATA_CFACKPOLL  0x0030
 149 #define IEEE80211_STYPE_NULLFUNC        0x0040
 150 #define IEEE80211_STYPE_CFACK           0x0050
 151 #define IEEE80211_STYPE_CFPOLL          0x0060
 152 #define IEEE80211_STYPE_CFACKPOLL       0x0070
 153
 154 #define IEEE80211_SCTL_FRAG             0x000F
 155 #define IEEE80211_SCTL_SEQ              0xFFF0
 156
 157
 158 /* debug macros */
 159
 160 #ifdef CONFIG_IEEE80211_DEBUG
 161 extern u32 ieee80211_debug_level;
 162 #define IEEE80211_DEBUG(level, fmt, args...) \
 163 do { if (ieee80211_debug_level & (level)) \
 164   printk(KERN_DEBUG "ieee80211: %c %s " fmt, \
 165          in_interrupt() ? 'I' : 'U', __FUNCTION__ , ## args); } while (0)
 166 #else
 167 #define IEEE80211_DEBUG(level, fmt, args...) do {} while (0)
 168 #endif  /* CONFIG_IEEE80211_DEBUG */
 169
 170 /*
 171  * To use the debug system;
 172  *
 173  * If you are defining a new debug classification, simply add it to the #define
 174  * list here in the form of:
 175  *
 176  * #define IEEE80211_DL_xxxx VALUE
 177  *
 178  * shifting value to the left one bit from the previous entry.  xxxx should be
 179  * the name of the classification (for example, WEP)
 180  *
 181  * You then need to either add a IEEE80211_xxxx_DEBUG() macro definition for your
 182  * classification, or use IEEE80211_DEBUG(IEEE80211_DL_xxxx, ...) whenever you want
 183  * to send output to that classification.
 184  *
 185  * To add your debug level to the list of levels seen when you perform
 186  *
 187  * % cat /proc/net/ipw/debug_level
 188  *
 189  * you simply need to add your entry to the ipw_debug_levels array.
 190  *
 191  * If you do not see debug_level in /proc/net/ipw then you do not have
 192  * CONFIG_IEEE80211_DEBUG defined in your kernel configuration
 193  *
 194  */
 195
 196 #define IEEE80211_DL_INFO          (1<<0)
 197 #define IEEE80211_DL_WX            (1<<1)
 198 #define IEEE80211_DL_SCAN          (1<<2)
 199 #define IEEE80211_DL_STATE         (1<<3)
 200 #define IEEE80211_DL_MGMT          (1<<4)
 201 #define IEEE80211_DL_FRAG          (1<<5)
 202 #define IEEE80211_DL_EAP           (1<<6)
 203 #define IEEE80211_DL_DROP          (1<<7)
 204
 205 #define IEEE80211_DL_TX            (1<<8)
 206 #define IEEE80211_DL_RX            (1<<9)
 207
 208 #define IEEE80211_ERROR(f, a...) printk(KERN_ERR "ieee80211: " f, ## a)
 209 #define IEEE80211_WARNING(f, a...) printk(KERN_WARNING "ieee80211: " f, ## a)
 210 #define IEEE80211_DEBUG_INFO(f, a...)   IEEE80211_DEBUG(IEEE80211_DL_INFO, f, ## a)
 211
 212 #define IEEE80211_DEBUG_WX(f, a...)     IEEE80211_DEBUG(IEEE80211_DL_WX, f, ## a)
 213 #define IEEE80211_DEBUG_SCAN(f, a...)   IEEE80211_DEBUG(IEEE80211_DL_SCAN, f, ## a)
 214 #define IEEE80211_DEBUG_STATE(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_STATE, f, ## a)
 215 #define IEEE80211_DEBUG_MGMT(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_MGMT, f, ## a)
 216 #define IEEE80211_DEBUG_FRAG(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_FRAG, f, ## a)
 217 #define IEEE80211_DEBUG_EAP(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_EAP, f, ## a)
 218 #define IEEE80211_DEBUG_DROP(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_DROP, f, ## a)
 219 #define IEEE80211_DEBUG_TX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_TX, f, ## a)
 220 #define IEEE80211_DEBUG_RX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_RX, f, ## a)
 221 #include <linux/netdevice.h>
 222 #include <linux/wireless.h>
 223 #include <linux/if_arp.h> /* ARPHRD_ETHER */
 224
 225 #ifndef WIRELESS_SPY
 226 #define WIRELESS_SPY            // enable iwspy support
 227 #endif
 228 #include <net/iw_handler.h>     // new driver API
 229
 230 #ifndef ETH_P_PAE
 231 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
 232 #endif /* ETH_P_PAE */
 233
 234 #define ETH_P_PREAUTH 0x88C7 /* IEEE 802.11i pre-authentication */
 235
 236 #ifndef ETH_P_80211_RAW
 237 #define ETH_P_80211_RAW (ETH_P_ECONET + 1)
 238 #endif
 239
 240 /* IEEE 802.11 defines */
 241
 242 #define P80211_OUI_LEN 3
 243
 244 struct ieee80211_snap_hdr {
 245
 246         u8    dsap;   /* always 0xAA */
 247         u8    ssap;   /* always 0xAA */
 248         u8    ctrl;   /* always 0x03 */
 249         u8    oui[P80211_OUI_LEN];    /* organizational universal id */
 250
 251 } __attribute__ ((packed));
 252
 253 #define SNAP_SIZE sizeof(struct ieee80211_snap_hdr)
 254
 255 #define WLAN_FC_GET_TYPE(fc) ((fc) & IEEE80211_FCTL_FTYPE)
 256 #define WLAN_FC_GET_STYPE(fc) ((fc) & IEEE80211_FCTL_STYPE)
 257
 258 #define WLAN_GET_SEQ_FRAG(seq) ((seq) & IEEE80211_SCTL_FRAG)
 259 #define WLAN_GET_SEQ_SEQ(seq)  ((seq) & IEEE80211_SCTL_SEQ)
 260
 261 /* Authentication algorithms */
 262 #define WLAN_AUTH_OPEN 0
 263 #define WLAN_AUTH_SHARED_KEY 1
 264
 265 #define WLAN_AUTH_CHALLENGE_LEN 128
 266
 267 #define WLAN_CAPABILITY_ESS (1<<0)
 268 #define WLAN_CAPABILITY_BSS WLAN_CAPABILITY_ESS
 269 #define WLAN_CAPABILITY_IBSS (1<<1)
 270 #define WLAN_CAPABILITY_CF_POLLABLE (1<<2)
 271 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
 272 #define WLAN_CAPABILITY_PRIVACY (1<<4)
 273 #define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
 274 #define WLAN_CAPABILITY_PBCC (1<<6)
 275 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
 276
 277 /* Status codes */
 278 #define WLAN_STATUS_SUCCESS 0
 279 #define WLAN_STATUS_UNSPECIFIED_FAILURE 1
 280 #define WLAN_STATUS_CAPS_UNSUPPORTED 10
 281 #define WLAN_STATUS_REASSOC_NO_ASSOC 11
 282 #define WLAN_STATUS_ASSOC_DENIED_UNSPEC 12
 283 #define WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG 13
 284 #define WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION 14
 285 #define WLAN_STATUS_CHALLENGE_FAIL 15
 286 #define WLAN_STATUS_AUTH_TIMEOUT 16
 287 #define WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA 17
 288 #define WLAN_STATUS_ASSOC_DENIED_RATES 18
 289 /* 802.11b */
 290 #define WLAN_STATUS_ASSOC_DENIED_NOSHORT 19
 291 #define WLAN_STATUS_ASSOC_DENIED_NOPBCC 20
 292 #define WLAN_STATUS_ASSOC_DENIED_NOAGILITY 21
 293
 294 /* Reason codes */
 295 #define WLAN_REASON_UNSPECIFIED 1
 296 #define WLAN_REASON_PREV_AUTH_NOT_VALID 2
 297 #define WLAN_REASON_DEAUTH_LEAVING 3
 298 #define WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY 4
 299 #define WLAN_REASON_DISASSOC_AP_BUSY 5
 300 #define WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA 6
 301 #define WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA 7
 302 #define WLAN_REASON_DISASSOC_STA_HAS_LEFT 8
 303 #define WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH 9
 304
 305
 306 #define IEEE80211_STATMASK_SIGNAL (1<<0)
 307 #define IEEE80211_STATMASK_RSSI (1<<1)
 308 #define IEEE80211_STATMASK_NOISE (1<<2)
 309 #define IEEE80211_STATMASK_RATE (1<<3)
 310 #define IEEE80211_STATMASK_WEMASK 0x7
 311
 312
 313 #define IEEE80211_CCK_MODULATION    (1<<0)
 314 #define IEEE80211_OFDM_MODULATION   (1<<1)
 315
 316 #define IEEE80211_24GHZ_BAND     (1<<0)
 317 #define IEEE80211_52GHZ_BAND     (1<<1)
 318
 319 #define IEEE80211_CCK_RATE_1MB                  0x02
 320 #define IEEE80211_CCK_RATE_2MB                  0x04
 321 #define IEEE80211_CCK_RATE_5MB                  0x0B
 322 #define IEEE80211_CCK_RATE_11MB                 0x16
 323 #define IEEE80211_OFDM_RATE_6MB                 0x0C
 324 #define IEEE80211_OFDM_RATE_9MB                 0x12
 325 #define IEEE80211_OFDM_RATE_12MB                0x18
 326 #define IEEE80211_OFDM_RATE_18MB                0x24
 327 #define IEEE80211_OFDM_RATE_24MB                0x30
 328 #define IEEE80211_OFDM_RATE_36MB                0x48
 329 #define IEEE80211_OFDM_RATE_48MB                0x60
 330 #define IEEE80211_OFDM_RATE_54MB                0x6C
 331 #define IEEE80211_BASIC_RATE_MASK               0x80
 332
 333 #define IEEE80211_CCK_RATE_1MB_MASK             (1<<0)
 334 #define IEEE80211_CCK_RATE_2MB_MASK             (1<<1)
 335 #define IEEE80211_CCK_RATE_5MB_MASK             (1<<2)
 336 #define IEEE80211_CCK_RATE_11MB_MASK            (1<<3)
 337 #define IEEE80211_OFDM_RATE_6MB_MASK            (1<<4)
 338 #define IEEE80211_OFDM_RATE_9MB_MASK            (1<<5)
 339 #define IEEE80211_OFDM_RATE_12MB_MASK           (1<<6)
 340 #define IEEE80211_OFDM_RATE_18MB_MASK           (1<<7)
 341 #define IEEE80211_OFDM_RATE_24MB_MASK           (1<<8)
 342 #define IEEE80211_OFDM_RATE_36MB_MASK           (1<<9)
 343 #define IEEE80211_OFDM_RATE_48MB_MASK           (1<<10)
 344 #define IEEE80211_OFDM_RATE_54MB_MASK           (1<<11)
 345
 346 #define IEEE80211_CCK_RATES_MASK                0x0000000F
 347 #define IEEE80211_CCK_BASIC_RATES_MASK  (IEEE80211_CCK_RATE_1MB_MASK | \
 348         IEEE80211_CCK_RATE_2MB_MASK)
 349 #define IEEE80211_CCK_DEFAULT_RATES_MASK        (IEEE80211_CCK_BASIC_RATES_MASK | \
 350         IEEE80211_CCK_RATE_5MB_MASK | \
 351         IEEE80211_CCK_RATE_11MB_MASK)
 352
 353 #define IEEE80211_OFDM_RATES_MASK               0x00000FF0
 354 #define IEEE80211_OFDM_BASIC_RATES_MASK (IEEE80211_OFDM_RATE_6MB_MASK | \
 355         IEEE80211_OFDM_RATE_12MB_MASK | \
 356         IEEE80211_OFDM_RATE_24MB_MASK)
 357 #define IEEE80211_OFDM_DEFAULT_RATES_MASK       (IEEE80211_OFDM_BASIC_RATES_MASK | \
 358         IEEE80211_OFDM_RATE_9MB_MASK  | \
 359         IEEE80211_OFDM_RATE_18MB_MASK | \
 360         IEEE80211_OFDM_RATE_36MB_MASK | \
 361         IEEE80211_OFDM_RATE_48MB_MASK | \
 362         IEEE80211_OFDM_RATE_54MB_MASK)
 363 #define IEEE80211_DEFAULT_RATES_MASK (IEEE80211_OFDM_DEFAULT_RATES_MASK | \
 364                                 IEEE80211_CCK_DEFAULT_RATES_MASK)
 365
 366 #define IEEE80211_NUM_OFDM_RATES            8
 367 #define IEEE80211_NUM_CCK_RATES             4
 368 #define IEEE80211_OFDM_SHIFT_MASK_A         4
 369
 370
 371
 372
 373 /* NOTE: This data is for statistical purposes; not all hardware provides this
 374  *       information for frames received.  Not setting these will not cause
 375  *       any adverse affects. */
 376 struct ieee80211_rx_stats {
 377         u32 mac_time;
 378         s8 rssi;
 379         u8 signal;
 380         u8 noise;
 381         u16 rate; /* in 100 kbps */
 382         u8 received_channel;
 383         u8 control;
 384         u8 mask;
 385         u8 freq;
 386         u16 len;
 387 };
 388
 389 /* IEEE 802.11 requires that STA supports concurrent reception of at least
 390  * three fragmented frames. This define can be increased to support more
 391  * concurrent frames, but it should be noted that each entry can consume about
 392  * 2 kB of RAM and increasing cache size will slow down frame reassembly. */
 393 #define IEEE80211_FRAG_CACHE_LEN 4
 394
 395 struct ieee80211_frag_entry {
 396         unsigned long first_frag_time;
 397         unsigned int seq;
 398         unsigned int last_frag;
 399         struct sk_buff *skb;
 400         u8 src_addr[ETH_ALEN];
 401         u8 dst_addr[ETH_ALEN];
 402 };
 403
 404 struct ieee80211_stats {
 405         unsigned int tx_unicast_frames;
 406         unsigned int tx_multicast_frames;
 407         unsigned int tx_fragments;
 408         unsigned int tx_unicast_octets;
 409         unsigned int tx_multicast_octets;
 410         unsigned int tx_deferred_transmissions;
 411         unsigned int tx_single_retry_frames;
 412         unsigned int tx_multiple_retry_frames;
 413         unsigned int tx_retry_limit_exceeded;
 414         unsigned int tx_discards;
 415         unsigned int rx_unicast_frames;
 416         unsigned int rx_multicast_frames;
 417         unsigned int rx_fragments;
 418         unsigned int rx_unicast_octets;
 419         unsigned int rx_multicast_octets;
 420         unsigned int rx_fcs_errors;
 421         unsigned int rx_discards_no_buffer;
 422         unsigned int tx_discards_wrong_sa;
 423         unsigned int rx_discards_undecryptable;
 424         unsigned int rx_message_in_msg_fragments;
 425         unsigned int rx_message_in_bad_msg_fragments;
 426 };
 427
 428 struct ieee80211_device;
 429
 430 #include "ieee80211_crypt.h"
 431
 432 #define SEC_KEY_1         (1<<0)
 433 #define SEC_KEY_2         (1<<1)
 434 #define SEC_KEY_3         (1<<2)
 435 #define SEC_KEY_4         (1<<3)
 436 #define SEC_ACTIVE_KEY    (1<<4)
 437 #define SEC_AUTH_MODE     (1<<5)
 438 #define SEC_UNICAST_GROUP (1<<6)
 439 #define SEC_LEVEL         (1<<7)
 440 #define SEC_ENABLED       (1<<8)
 441
 442 #define SEC_LEVEL_0      0 /* None */
 443 #define SEC_LEVEL_1      1 /* WEP 40 and 104 bit */
 444 #define SEC_LEVEL_2      2 /* Level 1 + TKIP */
 445 #define SEC_LEVEL_2_CKIP 3 /* Level 1 + CKIP */
 446 #define SEC_LEVEL_3      4 /* Level 2 + CCMP */
 447
 448 #define WEP_KEYS 4
 449 #define WEP_KEY_LEN 13
 450
 451 struct ieee80211_security {
 452         u16 active_key:2,
 453             enabled:1,
 454             auth_mode:2,
 455             auth_algo:4,
 456             unicast_uses_group:1;
 457         u8 key_sizes[WEP_KEYS];
 458         u8 keys[WEP_KEYS][WEP_KEY_LEN];
 459         u8 level;
 460         u16 flags;
 461 } __attribute__ ((packed));
 462
 463
 464 /*
 465
 466  802.11 data frame from AP
 467
 468       ,-------------------------------------------------------------------.
 469 Bytes |  2   |  2   |    6    |    6    |    6    |  2   | 0..2312 |   4  |
 470       |------|------|---------|---------|---------|------|---------|------|
 471 Desc. | ctrl | dura |  DA/RA  |   TA    |    SA   | Sequ |  frame  |  fcs |
 472       |      | tion | (BSSID) |         |         | ence |  data   |      |
 473       `-------------------------------------------------------------------'
 474
 475 Total: 28-2340 bytes
 476
 477 */
 478
 479 #define BEACON_PROBE_SSID_ID_POSITION 12
 480
 481 /* Management Frame Information Element Types */
 482 #define MFIE_TYPE_SSID       0
 483 #define MFIE_TYPE_RATES      1
 484 #define MFIE_TYPE_FH_SET     2
 485 #define MFIE_TYPE_DS_SET     3
 486 #define MFIE_TYPE_CF_SET     4
 487 #define MFIE_TYPE_TIM        5
 488 #define MFIE_TYPE_IBSS_SET   6
 489 #define MFIE_TYPE_CHALLENGE  16
 490 #define MFIE_TYPE_RSN        48
 491 #define MFIE_TYPE_RATES_EX   50
 492 #define MFIE_TYPE_GENERIC    221
 493
 494 struct ieee80211_info_element_hdr {
 495         u8 id;
 496         u8 len;
 497 } __attribute__ ((packed));
 498
 499 struct ieee80211_info_element {
 500         u8 id;
 501         u8 len;
 502         u8 data[0];
 503 } __attribute__ ((packed));
 504
 505 /*
 506  * These are the data types that can make up management packets
 507  *
 508         u16 auth_algorithm;
 509         u16 auth_sequence;
 510         u16 beacon_interval;
 511         u16 capability;
 512         u8 current_ap[ETH_ALEN];
 513         u16 listen_interval;
 514         struct {
 515                 u16 association_id:14, reserved:2;
 516         } __attribute__ ((packed));
 517         u32 time_stamp[2];
 518         u16 reason;
 519         u16 status;
 520 */
 521
 522 struct ieee80211_authentication {
 523         struct ieee80211_hdr_3addr header;
 524         u16 algorithm;
 525         u16 transaction;
 526         u16 status;
 527         struct ieee80211_info_element info_element;
 528 } __attribute__ ((packed));
 529
 530
 531 struct ieee80211_probe_response {
 532         struct ieee80211_hdr_3addr header;
 533         u32 time_stamp[2];
 534         u16 beacon_interval;
 535         u16 capability;
 536         struct ieee80211_info_element info_element;
 537 } __attribute__ ((packed));
 538
 539 struct ieee80211_assoc_request_frame {
 540         u16 capability;
 541         u16 listen_interval;
 542         u8 current_ap[ETH_ALEN];
 543         struct ieee80211_info_element info_element;
 544 } __attribute__ ((packed));
 545
 546 struct ieee80211_assoc_response_frame {
 547         struct ieee80211_hdr_3addr header;
 548         u16 capability;
 549         u16 status;
 550         u16 aid;
 551         struct ieee80211_info_element info_element; /* supported rates */
 552 } __attribute__ ((packed));
 553
 554
 555 struct ieee80211_txb {
 556         u8 nr_frags;
 557         u8 encrypted;
 558         u16 reserved;
 559         u16 frag_size;
 560         u16 payload_size;
 561         struct sk_buff *fragments[0];
 562 };
 563
 564
 565 /* SWEEP TABLE ENTRIES NUMBER*/
 566 #define MAX_SWEEP_TAB_ENTRIES             42
 567 #define MAX_SWEEP_TAB_ENTRIES_PER_PACKET  7
 568 /* MAX_RATES_LENGTH needs to be 12.  The spec says 8, and many APs
 569  * only use 8, and then use extended rates for the remaining supported
 570  * rates.  Other APs, however, stick all of their supported rates on the
 571  * main rates information element... */
 572 #define MAX_RATES_LENGTH                  ((u8)12)
 573 #define MAX_RATES_EX_LENGTH               ((u8)16)
 574 #define MAX_NETWORK_COUNT                  128
 575
 576 #define CRC_LENGTH                 4U
 577
 578 #define MAX_WPA_IE_LEN 64
 579
 580 #define NETWORK_EMPTY_ESSID (1<<0)
 581 #define NETWORK_HAS_OFDM    (1<<1)
 582 #define NETWORK_HAS_CCK     (1<<2)
 583
 584 struct ieee80211_network {
 585         /* These entries are used to identify a unique network */
 586         u8 bssid[ETH_ALEN];
 587         u8 channel;
 588         /* Ensure null-terminated for any debug msgs */
 589         u8 ssid[IW_ESSID_MAX_SIZE + 1];
 590         u8 ssid_len;
 591
 592         /* These are network statistics */
 593         struct ieee80211_rx_stats stats;
 594         u16 capability;
 595         u8 rates[MAX_RATES_LENGTH];
 596         u8 rates_len;
 597         u8 rates_ex[MAX_RATES_EX_LENGTH];
 598         u8 rates_ex_len;
 599         unsigned long last_scanned;
 600         u8 mode;
 601         u8 flags;
 602         u32 last_associate;
 603         u32 time_stamp[2];
 604         u16 beacon_interval;
 605         u16 listen_interval;
 606         u16 atim_window;
 607         u8 wpa_ie[MAX_WPA_IE_LEN];
 608         size_t wpa_ie_len;
 609         u8 rsn_ie[MAX_WPA_IE_LEN];
 610         size_t rsn_ie_len;
 611         struct list_head list;
 612 };
 613
 614 enum ieee80211_state {
 615         IEEE80211_UNINITIALIZED = 0,
 616         IEEE80211_INITIALIZED,
 617         IEEE80211_ASSOCIATING,
 618         IEEE80211_ASSOCIATED,
 619         IEEE80211_AUTHENTICATING,
 620         IEEE80211_AUTHENTICATED,
 621         IEEE80211_SHUTDOWN
 622 };
 623
 624 #define DEFAULT_MAX_SCAN_AGE (15 * HZ)
 625 #define DEFAULT_FTS 2346
 626 #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
 627 #define MAC_ARG(x) ((u8*)(x))[0],((u8*)(x))[1],((u8*)(x))[2],((u8*)(x))[3],((u8*)(x))[4],((u8*)(x))[5]
 628
 629
 630 #define CFG_IEEE80211_RESERVE_FCS (1<<0)
 631 #define CFG_IEEE80211_COMPUTE_FCS (1<<1)
 632
 633 struct ieee80211_device {
 634         struct net_device *dev;
 635
 636         /* Bookkeeping structures */
 637         struct net_device_stats stats;
 638         struct ieee80211_stats ieee_stats;
 639
 640         /* Probe / Beacon management */
 641         struct list_head network_free_list;
 642         struct list_head network_list;
 643         struct ieee80211_network *networks;
 644         int scans;
 645         int scan_age;
 646
 647         int iw_mode; /* operating mode (IW_MODE_*) */
 648
 649         spinlock_t lock;
 650
 651         int tx_headroom; /* Set to size of any additional room needed at front
 652                           * of allocated Tx SKBs */
 653         u32 config;
 654
 655         /* WEP and other encryption related settings at the device level */
 656         int open_wep; /* Set to 1 to allow unencrypted frames */
 657
 658         int reset_on_keychange; /* Set to 1 if the HW needs to be reset on
 659                                  * WEP key changes */
 660
 661         /* If the host performs {en,de}cryption, then set to 1 */
 662         int host_encrypt;
 663         int host_decrypt;
 664         int ieee802_1x; /* is IEEE 802.1X used */
 665
 666         /* WPA data */
 667         int wpa_enabled;
 668         int drop_unencrypted;
 669         int tkip_countermeasures;
 670         int privacy_invoked;
 671         size_t wpa_ie_len;
 672         u8 *wpa_ie;
 673
 674         struct list_head crypt_deinit_list;
 675         struct ieee80211_crypt_data *crypt[WEP_KEYS];
 676         int tx_keyidx; /* default TX key index (crypt[tx_keyidx]) */
 677         struct timer_list crypt_deinit_timer;
 678
 679         int bcrx_sta_key; /* use individual keys to override default keys even
 680                            * with RX of broad/multicast frames */
 681
 682         /* Fragmentation structures */
 683         struct ieee80211_frag_entry frag_cache[IEEE80211_FRAG_CACHE_LEN];
 684         unsigned int frag_next_idx;
 685         u16 fts; /* Fragmentation Threshold */
 686
 687         /* Association info */
 688         u8 bssid[ETH_ALEN];
 689
 690         enum ieee80211_state state;
 691
 692         int mode;       /* A, B, G */
 693         int modulation; /* CCK, OFDM */
 694         int freq_band;  /* 2.4Ghz, 5.2Ghz, Mixed */
 695         int abg_ture;   /* ABG flag              */
 696
 697         /* Callback functions */
 698         void (*set_security)(struct net_device *dev,
 699                              struct ieee80211_security *sec);
 700         int (*hard_start_xmit)(struct ieee80211_txb *txb,
 701                                struct net_device *dev);
 702         int (*reset_port)(struct net_device *dev);
 703
 704         /* This must be the last item so that it points to the data
 705          * allocated beyond this structure by alloc_ieee80211 */
 706         u8 priv[0];
 707 };
 708
 709 #define IEEE_A            (1<<0)
 710 #define IEEE_B            (1<<1)
 711 #define IEEE_G            (1<<2)
 712 #define IEEE_MODE_MASK    (IEEE_A|IEEE_B|IEEE_G)
 713
 714 extern inline void *ieee80211_priv(struct net_device *dev)
 715 {
 716         return ((struct ieee80211_device *)netdev_priv(dev))->priv;
 717 }
 718
 719 extern inline int ieee80211_is_empty_essid(const char *essid, int essid_len)
 720 {
 721         /* Single white space is for Linksys APs */
 722         if (essid_len == 1 && essid[0] == ' ')
 723                 return 1;
 724
 725         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 726         while (essid_len) {
 727                 essid_len--;
 728                 if (essid[essid_len] != '\0')
 729                         return 0;
 730         }
 731
 732         return 1;
 733 }
 734
 735 extern inline int ieee80211_is_valid_mode(struct ieee80211_device *ieee, int mode)
 736 {
 737         /*
 738          * It is possible for both access points and our device to support
 739          * combinations of modes, so as long as there is one valid combination
 740          * of ap/device supported modes, then return success
 741          *
 742          */
 743         if ((mode & IEEE_A) &&
 744             (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
 745             (ieee->freq_band & IEEE80211_52GHZ_BAND))
 746                 return 1;
 747
 748         if ((mode & IEEE_G) &&
 749             (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
 750             (ieee->freq_band & IEEE80211_24GHZ_BAND))
 751                 return 1;
 752
 753         if ((mode & IEEE_B) &&
 754             (ieee->modulation & IEEE80211_CCK_MODULATION) &&
 755             (ieee->freq_band & IEEE80211_24GHZ_BAND))
 756                 return 1;
 757
 758         return 0;
 759 }
 760
 761 extern inline int ieee80211_get_hdrlen(u16 fc)
 762 {
 763         int hdrlen = IEEE80211_3ADDR_LEN;
 764
 765         switch (WLAN_FC_GET_TYPE(fc)) {
 766         case IEEE80211_FTYPE_DATA:
 767                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 768                         hdrlen = IEEE80211_4ADDR_LEN;
 769                 break;
 770         case IEEE80211_FTYPE_CTL:
 771                 switch (WLAN_FC_GET_STYPE(fc)) {
 772                 case IEEE80211_STYPE_CTS:
 773                 case IEEE80211_STYPE_ACK:
 774                         hdrlen = IEEE80211_1ADDR_LEN;
 775                         break;
 776                 default:
 777                         hdrlen = IEEE80211_2ADDR_LEN;
 778                         break;
 779                 }
 780                 break;
 781         }
 782
 783         return hdrlen;
 784 }
 785
 786
 787
 788 /* ieee80211.c */
 789 extern void free_ieee80211(struct net_device *dev);
 790 extern struct net_device *alloc_ieee80211(int sizeof_priv);
 791
 792 extern int ieee80211_set_encryption(struct ieee80211_device *ieee);
 793
 794 /* ieee80211_tx.c */
 795
 796
 797 extern int ieee80211_xmit(struct sk_buff *skb,
 798                           struct net_device *dev);
 799 extern void ieee80211_txb_free(struct ieee80211_txb *);
 800
 801
 802 /* ieee80211_rx.c */
 803 extern int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 804                         struct ieee80211_rx_stats *rx_stats);
 805 extern void ieee80211_rx_mgt(struct ieee80211_device *ieee,
 806                              struct ieee80211_hdr *header,
 807                              struct ieee80211_rx_stats *stats);
 808
 809 /* iee80211_wx.c */
 810 extern int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
 811                                  struct iw_request_info *info,
 812                                  union iwreq_data *wrqu, char *key);
 813 extern int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 814                                    struct iw_request_info *info,
 815                                    union iwreq_data *wrqu, char *key);
 816 extern int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
 817                                    struct iw_request_info *info,
 818                                    union iwreq_data *wrqu, char *key);
 819
 820
 821 extern inline void ieee80211_increment_scans(struct ieee80211_device *ieee)
 822 {
 823         ieee->scans++;
 824 }
 825
 826 extern inline int ieee80211_get_scans(struct ieee80211_device *ieee)
 827 {
 828         return ieee->scans;
 829 }
 830
 831 static inline const char *escape_essid(const char *essid, u8 essid_len) {
 832         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 833         const char *s = essid;
 834         char *d = escaped;
 835
 836         if (ieee80211_is_empty_essid(essid, essid_len)) {
 837                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 838                 return escaped;
 839         }
 840
 841         essid_len = min(essid_len, (u8)IW_ESSID_MAX_SIZE);
 842         while (essid_len--) {
 843                 if (*s == '\0') {
 844                         *d++ = '\\';
 845                         *d++ = '0';
 846                         s++;
 847                 } else {
 848                         *d++ = *s++;
 849                 }
 850         }
 851         *d = '\0';
 852         return escaped;
 853 }
 854 #endif /* IEEE80211_H */