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_PROTECTED        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 #define IEEE80211_STYPE_ACTION          0x00D0
 136
 137 /* control */
 138 #define IEEE80211_STYPE_PSPOLL          0x00A0
 139 #define IEEE80211_STYPE_RTS             0x00B0
 140 #define IEEE80211_STYPE_CTS             0x00C0
 141 #define IEEE80211_STYPE_ACK             0x00D0
 142 #define IEEE80211_STYPE_CFEND           0x00E0
 143 #define IEEE80211_STYPE_CFENDACK        0x00F0
 144
 145 /* data */
 146 #define IEEE80211_STYPE_DATA            0x0000
 147 #define IEEE80211_STYPE_DATA_CFACK      0x0010
 148 #define IEEE80211_STYPE_DATA_CFPOLL     0x0020
 149 #define IEEE80211_STYPE_DATA_CFACKPOLL  0x0030
 150 #define IEEE80211_STYPE_NULLFUNC        0x0040
 151 #define IEEE80211_STYPE_CFACK           0x0050
 152 #define IEEE80211_STYPE_CFPOLL          0x0060
 153 #define IEEE80211_STYPE_CFACKPOLL       0x0070
 154
 155 #define IEEE80211_SCTL_FRAG             0x000F
 156 #define IEEE80211_SCTL_SEQ              0xFFF0
 157
 158
 159 /* debug macros */
 160
 161 #ifdef CONFIG_IEEE80211_DEBUG
 162 extern u32 ieee80211_debug_level;
 163 #define IEEE80211_DEBUG(level, fmt, args...) \
 164 do { if (ieee80211_debug_level & (level)) \
 165   printk(KERN_DEBUG "ieee80211: %c %s " fmt, \
 166          in_interrupt() ? 'I' : 'U', __FUNCTION__ , ## args); } while (0)
 167 #else
 168 #define IEEE80211_DEBUG(level, fmt, args...) do {} while (0)
 169 #endif  /* CONFIG_IEEE80211_DEBUG */
 170
 171
 172 /* debug macros not dependent on CONFIG_IEEE80211_DEBUG */
 173
 174 #define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
 175 #define MAC_ARG(x) ((u8*)(x))[0],((u8*)(x))[1],((u8*)(x))[2],((u8*)(x))[3],((u8*)(x))[4],((u8*)(x))[5]
 176
 177 /* escape_essid() is intended to be used in debug (and possibly error)
 178  * messages. It should never be used for passing essid to user space. */
 179 const char *escape_essid(const char *essid, u8 essid_len);
 180
 181
 182 /*
 183  * To use the debug system:
 184  *
 185  * If you are defining a new debug classification, simply add it to the #define
 186  * list here in the form of:
 187  *
 188  * #define IEEE80211_DL_xxxx VALUE
 189  *
 190  * shifting value to the left one bit from the previous entry.  xxxx should be
 191  * the name of the classification (for example, WEP)
 192  *
 193  * You then need to either add a IEEE80211_xxxx_DEBUG() macro definition for your
 194  * classification, or use IEEE80211_DEBUG(IEEE80211_DL_xxxx, ...) whenever you want
 195  * to send output to that classification.
 196  *
 197  * To add your debug level to the list of levels seen when you perform
 198  *
 199  * % cat /proc/net/ipw/debug_level
 200  *
 201  * you simply need to add your entry to the ipw_debug_levels array.
 202  *
 203  * If you do not see debug_level in /proc/net/ipw then you do not have
 204  * CONFIG_IEEE80211_DEBUG defined in your kernel configuration
 205  *
 206  */
 207
 208 #define IEEE80211_DL_INFO          (1<<0)
 209 #define IEEE80211_DL_WX            (1<<1)
 210 #define IEEE80211_DL_SCAN          (1<<2)
 211 #define IEEE80211_DL_STATE         (1<<3)
 212 #define IEEE80211_DL_MGMT          (1<<4)
 213 #define IEEE80211_DL_FRAG          (1<<5)
 214 #define IEEE80211_DL_EAP           (1<<6)
 215 #define IEEE80211_DL_DROP          (1<<7)
 216
 217 #define IEEE80211_DL_TX            (1<<8)
 218 #define IEEE80211_DL_RX            (1<<9)
 219
 220 #define IEEE80211_ERROR(f, a...) printk(KERN_ERR "ieee80211: " f, ## a)
 221 #define IEEE80211_WARNING(f, a...) printk(KERN_WARNING "ieee80211: " f, ## a)
 222 #define IEEE80211_DEBUG_INFO(f, a...)   IEEE80211_DEBUG(IEEE80211_DL_INFO, f, ## a)
 223
 224 #define IEEE80211_DEBUG_WX(f, a...)     IEEE80211_DEBUG(IEEE80211_DL_WX, f, ## a)
 225 #define IEEE80211_DEBUG_SCAN(f, a...)   IEEE80211_DEBUG(IEEE80211_DL_SCAN, f, ## a)
 226 #define IEEE80211_DEBUG_STATE(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_STATE, f, ## a)
 227 #define IEEE80211_DEBUG_MGMT(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_MGMT, f, ## a)
 228 #define IEEE80211_DEBUG_FRAG(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_FRAG, f, ## a)
 229 #define IEEE80211_DEBUG_EAP(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_EAP, f, ## a)
 230 #define IEEE80211_DEBUG_DROP(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_DROP, f, ## a)
 231 #define IEEE80211_DEBUG_TX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_TX, f, ## a)
 232 #define IEEE80211_DEBUG_RX(f, a...)  IEEE80211_DEBUG(IEEE80211_DL_RX, f, ## a)
 233 #include <linux/netdevice.h>
 234 #include <linux/wireless.h>
 235 #include <linux/if_arp.h> /* ARPHRD_ETHER */
 236
 237 #ifndef WIRELESS_SPY
 238 #define WIRELESS_SPY            // enable iwspy support
 239 #endif
 240 #include <net/iw_handler.h>     // new driver API
 241
 242 #ifndef ETH_P_PAE
 243 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
 244 #endif /* ETH_P_PAE */
 245
 246 #define ETH_P_PREAUTH 0x88C7 /* IEEE 802.11i pre-authentication */
 247
 248 #ifndef ETH_P_80211_RAW
 249 #define ETH_P_80211_RAW (ETH_P_ECONET + 1)
 250 #endif
 251
 252 /* IEEE 802.11 defines */
 253
 254 #define P80211_OUI_LEN 3
 255
 256 struct ieee80211_snap_hdr {
 257
 258         u8    dsap;   /* always 0xAA */
 259         u8    ssap;   /* always 0xAA */
 260         u8    ctrl;   /* always 0x03 */
 261         u8    oui[P80211_OUI_LEN];    /* organizational universal id */
 262
 263 } __attribute__ ((packed));
 264
 265 #define SNAP_SIZE sizeof(struct ieee80211_snap_hdr)
 266
 267 #define WLAN_FC_GET_VERS(fc) ((fc) & IEEE80211_FCTL_VERS)
 268 #define WLAN_FC_GET_TYPE(fc) ((fc) & IEEE80211_FCTL_FTYPE)
 269 #define WLAN_FC_GET_STYPE(fc) ((fc) & IEEE80211_FCTL_STYPE)
 270
 271 #define WLAN_GET_SEQ_FRAG(seq) ((seq) & IEEE80211_SCTL_FRAG)
 272 #define WLAN_GET_SEQ_SEQ(seq)  ((seq) & IEEE80211_SCTL_SEQ)
 273
 274 /* Authentication algorithms */
 275 #define WLAN_AUTH_OPEN 0
 276 #define WLAN_AUTH_SHARED_KEY 1
 277
 278 #define WLAN_AUTH_CHALLENGE_LEN 128
 279
 280 #define WLAN_CAPABILITY_ESS (1<<0)
 281 #define WLAN_CAPABILITY_IBSS (1<<1)
 282 #define WLAN_CAPABILITY_CF_POLLABLE (1<<2)
 283 #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
 284 #define WLAN_CAPABILITY_PRIVACY (1<<4)
 285 #define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
 286 #define WLAN_CAPABILITY_PBCC (1<<6)
 287 #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
 288 #define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8)
 289 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
 290 #define WLAN_CAPABILITY_OSSS_OFDM (1<<13)
 291
 292 /* Status codes */
 293 #define WLAN_STATUS_SUCCESS 0
 294 #define WLAN_STATUS_UNSPECIFIED_FAILURE 1
 295 #define WLAN_STATUS_CAPS_UNSUPPORTED 10
 296 #define WLAN_STATUS_REASSOC_NO_ASSOC 11
 297 #define WLAN_STATUS_ASSOC_DENIED_UNSPEC 12
 298 #define WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG 13
 299 #define WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION 14
 300 #define WLAN_STATUS_CHALLENGE_FAIL 15
 301 #define WLAN_STATUS_AUTH_TIMEOUT 16
 302 #define WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA 17
 303 #define WLAN_STATUS_ASSOC_DENIED_RATES 18
 304 /* 802.11b */
 305 #define WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE 19
 306 #define WLAN_STATUS_ASSOC_DENIED_NOPBCC 20
 307 #define WLAN_STATUS_ASSOC_DENIED_NOAGILITY 21
 308 /* 802.11h */
 309 #define WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM 22
 310 #define WLAN_STATUS_ASSOC_REJECTED_BAD_POWER 23
 311 #define WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN 24
 312 /* 802.11g */
 313 #define WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME 25
 314 #define WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM 26
 315 /* 802.11i */
 316 #define WLAN_STATUS_INVALID_IE 40
 317 #define WLAN_STATUS_INVALID_GROUP_CIPHER 41
 318 #define WLAN_STATUS_INVALID_PAIRWISE_CIPHER 42
 319 #define WLAN_STATUS_INVALID_AKMP 43
 320 #define WLAN_STATUS_UNSUPP_RSN_VERSION 44
 321 #define WLAN_STATUS_INVALID_RSN_IE_CAP 45
 322 #define WLAN_STATUS_CIPHER_SUITE_REJECTED 46
 323
 324 /* Reason codes */
 325 #define WLAN_REASON_UNSPECIFIED 1
 326 #define WLAN_REASON_PREV_AUTH_NOT_VALID 2
 327 #define WLAN_REASON_DEAUTH_LEAVING 3
 328 #define WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY 4
 329 #define WLAN_REASON_DISASSOC_AP_BUSY 5
 330 #define WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA 6
 331 #define WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA 7
 332 #define WLAN_REASON_DISASSOC_STA_HAS_LEFT 8
 333 #define WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH 9
 334 /* 802.11h */
 335 #define WLAN_REASON_DISASSOC_BAD_POWER 10
 336 #define WLAN_REASON_DISASSOC_BAD_SUPP_CHAN 11
 337 /* 802.11i */
 338 #define WLAN_REASON_INVALID_IE 13
 339 #define WLAN_REASON_MIC_FAILURE 14
 340 #define WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT 15
 341 #define WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT 16
 342 #define WLAN_REASON_IE_DIFFERENT 17
 343 #define WLAN_REASON_INVALID_GROUP_CIPHER 18
 344 #define WLAN_REASON_INVALID_PAIRWISE_CIPHER 19
 345 #define WLAN_REASON_INVALID_AKMP 20
 346 #define WLAN_REASON_UNSUPP_RSN_VERSION 21
 347 #define WLAN_REASON_INVALID_RSN_IE_CAP 22
 348 #define WLAN_REASON_IEEE8021X_FAILED 23
 349 #define WLAN_REASON_CIPHER_SUITE_REJECTED 24
 350
 351
 352 #define IEEE80211_STATMASK_SIGNAL (1<<0)
 353 #define IEEE80211_STATMASK_RSSI (1<<1)
 354 #define IEEE80211_STATMASK_NOISE (1<<2)
 355 #define IEEE80211_STATMASK_RATE (1<<3)
 356 #define IEEE80211_STATMASK_WEMASK 0x7
 357
 358
 359 #define IEEE80211_CCK_MODULATION    (1<<0)
 360 #define IEEE80211_OFDM_MODULATION   (1<<1)
 361
 362 #define IEEE80211_24GHZ_BAND     (1<<0)
 363 #define IEEE80211_52GHZ_BAND     (1<<1)
 364
 365 #define IEEE80211_CCK_RATE_1MB                  0x02
 366 #define IEEE80211_CCK_RATE_2MB                  0x04
 367 #define IEEE80211_CCK_RATE_5MB                  0x0B
 368 #define IEEE80211_CCK_RATE_11MB                 0x16
 369 #define IEEE80211_OFDM_RATE_6MB                 0x0C
 370 #define IEEE80211_OFDM_RATE_9MB                 0x12
 371 #define IEEE80211_OFDM_RATE_12MB                0x18
 372 #define IEEE80211_OFDM_RATE_18MB                0x24
 373 #define IEEE80211_OFDM_RATE_24MB                0x30
 374 #define IEEE80211_OFDM_RATE_36MB                0x48
 375 #define IEEE80211_OFDM_RATE_48MB                0x60
 376 #define IEEE80211_OFDM_RATE_54MB                0x6C
 377 #define IEEE80211_BASIC_RATE_MASK               0x80
 378
 379 #define IEEE80211_CCK_RATE_1MB_MASK             (1<<0)
 380 #define IEEE80211_CCK_RATE_2MB_MASK             (1<<1)
 381 #define IEEE80211_CCK_RATE_5MB_MASK             (1<<2)
 382 #define IEEE80211_CCK_RATE_11MB_MASK            (1<<3)
 383 #define IEEE80211_OFDM_RATE_6MB_MASK            (1<<4)
 384 #define IEEE80211_OFDM_RATE_9MB_MASK            (1<<5)
 385 #define IEEE80211_OFDM_RATE_12MB_MASK           (1<<6)
 386 #define IEEE80211_OFDM_RATE_18MB_MASK           (1<<7)
 387 #define IEEE80211_OFDM_RATE_24MB_MASK           (1<<8)
 388 #define IEEE80211_OFDM_RATE_36MB_MASK           (1<<9)
 389 #define IEEE80211_OFDM_RATE_48MB_MASK           (1<<10)
 390 #define IEEE80211_OFDM_RATE_54MB_MASK           (1<<11)
 391
 392 #define IEEE80211_CCK_RATES_MASK                0x0000000F
 393 #define IEEE80211_CCK_BASIC_RATES_MASK  (IEEE80211_CCK_RATE_1MB_MASK | \
 394         IEEE80211_CCK_RATE_2MB_MASK)
 395 #define IEEE80211_CCK_DEFAULT_RATES_MASK        (IEEE80211_CCK_BASIC_RATES_MASK | \
 396         IEEE80211_CCK_RATE_5MB_MASK | \
 397         IEEE80211_CCK_RATE_11MB_MASK)
 398
 399 #define IEEE80211_OFDM_RATES_MASK               0x00000FF0
 400 #define IEEE80211_OFDM_BASIC_RATES_MASK (IEEE80211_OFDM_RATE_6MB_MASK | \
 401         IEEE80211_OFDM_RATE_12MB_MASK | \
 402         IEEE80211_OFDM_RATE_24MB_MASK)
 403 #define IEEE80211_OFDM_DEFAULT_RATES_MASK       (IEEE80211_OFDM_BASIC_RATES_MASK | \
 404         IEEE80211_OFDM_RATE_9MB_MASK  | \
 405         IEEE80211_OFDM_RATE_18MB_MASK | \
 406         IEEE80211_OFDM_RATE_36MB_MASK | \
 407         IEEE80211_OFDM_RATE_48MB_MASK | \
 408         IEEE80211_OFDM_RATE_54MB_MASK)
 409 #define IEEE80211_DEFAULT_RATES_MASK (IEEE80211_OFDM_DEFAULT_RATES_MASK | \
 410                                 IEEE80211_CCK_DEFAULT_RATES_MASK)
 411
 412 #define IEEE80211_NUM_OFDM_RATES            8
 413 #define IEEE80211_NUM_CCK_RATES             4
 414 #define IEEE80211_OFDM_SHIFT_MASK_A         4
 415
 416
 417
 418
 419 /* NOTE: This data is for statistical purposes; not all hardware provides this
 420  *       information for frames received.  Not setting these will not cause
 421  *       any adverse affects. */
 422 struct ieee80211_rx_stats {
 423         u32 mac_time;
 424         s8 rssi;
 425         u8 signal;
 426         u8 noise;
 427         u16 rate; /* in 100 kbps */
 428         u8 received_channel;
 429         u8 control;
 430         u8 mask;
 431         u8 freq;
 432         u16 len;
 433 };
 434
 435 /* IEEE 802.11 requires that STA supports concurrent reception of at least
 436  * three fragmented frames. This define can be increased to support more
 437  * concurrent frames, but it should be noted that each entry can consume about
 438  * 2 kB of RAM and increasing cache size will slow down frame reassembly. */
 439 #define IEEE80211_FRAG_CACHE_LEN 4
 440
 441 struct ieee80211_frag_entry {
 442         unsigned long first_frag_time;
 443         unsigned int seq;
 444         unsigned int last_frag;
 445         struct sk_buff *skb;
 446         u8 src_addr[ETH_ALEN];
 447         u8 dst_addr[ETH_ALEN];
 448 };
 449
 450 struct ieee80211_stats {
 451         unsigned int tx_unicast_frames;
 452         unsigned int tx_multicast_frames;
 453         unsigned int tx_fragments;
 454         unsigned int tx_unicast_octets;
 455         unsigned int tx_multicast_octets;
 456         unsigned int tx_deferred_transmissions;
 457         unsigned int tx_single_retry_frames;
 458         unsigned int tx_multiple_retry_frames;
 459         unsigned int tx_retry_limit_exceeded;
 460         unsigned int tx_discards;
 461         unsigned int rx_unicast_frames;
 462         unsigned int rx_multicast_frames;
 463         unsigned int rx_fragments;
 464         unsigned int rx_unicast_octets;
 465         unsigned int rx_multicast_octets;
 466         unsigned int rx_fcs_errors;
 467         unsigned int rx_discards_no_buffer;
 468         unsigned int tx_discards_wrong_sa;
 469         unsigned int rx_discards_undecryptable;
 470         unsigned int rx_message_in_msg_fragments;
 471         unsigned int rx_message_in_bad_msg_fragments;
 472 };
 473
 474 struct ieee80211_device;
 475
 476 #include "ieee80211_crypt.h"
 477
 478 #define SEC_KEY_1         (1<<0)
 479 #define SEC_KEY_2         (1<<1)
 480 #define SEC_KEY_3         (1<<2)
 481 #define SEC_KEY_4         (1<<3)
 482 #define SEC_ACTIVE_KEY    (1<<4)
 483 #define SEC_AUTH_MODE     (1<<5)
 484 #define SEC_UNICAST_GROUP (1<<6)
 485 #define SEC_LEVEL         (1<<7)
 486 #define SEC_ENABLED       (1<<8)
 487
 488 #define SEC_LEVEL_0      0 /* None */
 489 #define SEC_LEVEL_1      1 /* WEP 40 and 104 bit */
 490 #define SEC_LEVEL_2      2 /* Level 1 + TKIP */
 491 #define SEC_LEVEL_2_CKIP 3 /* Level 1 + CKIP */
 492 #define SEC_LEVEL_3      4 /* Level 2 + CCMP */
 493
 494 #define WEP_KEYS 4
 495 #define WEP_KEY_LEN 13
 496
 497 struct ieee80211_security {
 498         u16 active_key:2,
 499             enabled:1,
 500             auth_mode:2,
 501             auth_algo:4,
 502             unicast_uses_group:1;
 503         u8 key_sizes[WEP_KEYS];
 504         u8 keys[WEP_KEYS][WEP_KEY_LEN];
 505         u8 level;
 506         u16 flags;
 507 } __attribute__ ((packed));
 508
 509
 510 /*
 511
 512  802.11 data frame from AP
 513
 514       ,-------------------------------------------------------------------.
 515 Bytes |  2   |  2   |    6    |    6    |    6    |  2   | 0..2312 |   4  |
 516       |------|------|---------|---------|---------|------|---------|------|
 517 Desc. | ctrl | dura |  DA/RA  |   TA    |    SA   | Sequ |  frame  |  fcs |
 518       |      | tion | (BSSID) |         |         | ence |  data   |      |
 519       `-------------------------------------------------------------------'
 520
 521 Total: 28-2340 bytes
 522
 523 */
 524
 525 #define BEACON_PROBE_SSID_ID_POSITION 12
 526
 527 /* Management Frame Information Element Types */
 528 #define MFIE_TYPE_SSID              0
 529 #define MFIE_TYPE_RATES             1
 530 #define MFIE_TYPE_FH_SET            2
 531 #define MFIE_TYPE_DS_SET            3
 532 #define MFIE_TYPE_CF_SET            4
 533 #define MFIE_TYPE_TIM               5
 534 #define MFIE_TYPE_IBSS_SET          6
 535 #define MFIE_TYPE_COUNTRY           7
 536 #define MFIE_TYPE_HOP_PARAMS        8
 537 #define MFIE_TYPE_HOP_TABLE         9
 538 #define MFIE_TYPE_REQUEST           10
 539 #define MFIE_TYPE_CHALLENGE         16
 540 #define MFIE_TYPE_POWER_CONSTRAINT  32
 541 #define MFIE_TYPE_POWER_CAPABILITY  33
 542 #define MFIE_TYPE_TPC_REQUEST       34
 543 #define MFIE_TYPE_TPC_REPORT        35
 544 #define MFIE_TYPE_SUPP_CHANNELS     36
 545 #define MFIE_TYPE_CSA               37
 546 #define MFIE_TYPE_MEASURE_REQUEST   38
 547 #define MFIE_TYPE_MEASURE_REPORT    39
 548 #define MFIE_TYPE_QUIET             40
 549 #define MFIE_TYPE_IBSS_DFS          41
 550 #define MFIE_TYPE_ERP_INFO          42
 551 #define MFIE_TYPE_RSN               48
 552 #define MFIE_TYPE_RATES_EX          50
 553 #define MFIE_TYPE_GENERIC           221
 554
 555 struct ieee80211_info_element_hdr {
 556         u8 id;
 557         u8 len;
 558 } __attribute__ ((packed));
 559
 560 struct ieee80211_info_element {
 561         u8 id;
 562         u8 len;
 563         u8 data[0];
 564 } __attribute__ ((packed));
 565
 566 /*
 567  * These are the data types that can make up management packets
 568  *
 569         u16 auth_algorithm;
 570         u16 auth_sequence;
 571         u16 beacon_interval;
 572         u16 capability;
 573         u8 current_ap[ETH_ALEN];
 574         u16 listen_interval;
 575         struct {
 576                 u16 association_id:14, reserved:2;
 577         } __attribute__ ((packed));
 578         u32 time_stamp[2];
 579         u16 reason;
 580         u16 status;
 581 */
 582
 583 struct ieee80211_authentication {
 584         struct ieee80211_hdr_3addr header;
 585         u16 algorithm;
 586         u16 transaction;
 587         u16 status;
 588         struct ieee80211_info_element info_element;
 589 } __attribute__ ((packed));
 590
 591
 592 struct ieee80211_probe_response {
 593         struct ieee80211_hdr_3addr header;
 594         u32 time_stamp[2];
 595         u16 beacon_interval;
 596         u16 capability;
 597         struct ieee80211_info_element info_element;
 598 } __attribute__ ((packed));
 599
 600 struct ieee80211_assoc_request_frame {
 601         u16 capability;
 602         u16 listen_interval;
 603         u8 current_ap[ETH_ALEN];
 604         struct ieee80211_info_element info_element;
 605 } __attribute__ ((packed));
 606
 607 struct ieee80211_assoc_response_frame {
 608         struct ieee80211_hdr_3addr header;
 609         u16 capability;
 610         u16 status;
 611         u16 aid;
 612         struct ieee80211_info_element info_element; /* supported rates */
 613 } __attribute__ ((packed));
 614
 615
 616 struct ieee80211_txb {
 617         u8 nr_frags;
 618         u8 encrypted;
 619         u16 reserved;
 620         u16 frag_size;
 621         u16 payload_size;
 622         struct sk_buff *fragments[0];
 623 };
 624
 625
 626 /* SWEEP TABLE ENTRIES NUMBER*/
 627 #define MAX_SWEEP_TAB_ENTRIES             42
 628 #define MAX_SWEEP_TAB_ENTRIES_PER_PACKET  7
 629 /* MAX_RATES_LENGTH needs to be 12.  The spec says 8, and many APs
 630  * only use 8, and then use extended rates for the remaining supported
 631  * rates.  Other APs, however, stick all of their supported rates on the
 632  * main rates information element... */
 633 #define MAX_RATES_LENGTH                  ((u8)12)
 634 #define MAX_RATES_EX_LENGTH               ((u8)16)
 635 #define MAX_NETWORK_COUNT                  128
 636
 637 #define CRC_LENGTH                 4U
 638
 639 #define MAX_WPA_IE_LEN 64
 640
 641 #define NETWORK_EMPTY_ESSID (1<<0)
 642 #define NETWORK_HAS_OFDM    (1<<1)
 643 #define NETWORK_HAS_CCK     (1<<2)
 644
 645 struct ieee80211_network {
 646         /* These entries are used to identify a unique network */
 647         u8 bssid[ETH_ALEN];
 648         u8 channel;
 649         /* Ensure null-terminated for any debug msgs */
 650         u8 ssid[IW_ESSID_MAX_SIZE + 1];
 651         u8 ssid_len;
 652
 653         /* These are network statistics */
 654         struct ieee80211_rx_stats stats;
 655         u16 capability;
 656         u8 rates[MAX_RATES_LENGTH];
 657         u8 rates_len;
 658         u8 rates_ex[MAX_RATES_EX_LENGTH];
 659         u8 rates_ex_len;
 660         unsigned long last_scanned;
 661         u8 mode;
 662         u8 flags;
 663         u32 last_associate;
 664         u32 time_stamp[2];
 665         u16 beacon_interval;
 666         u16 listen_interval;
 667         u16 atim_window;
 668         u8 wpa_ie[MAX_WPA_IE_LEN];
 669         size_t wpa_ie_len;
 670         u8 rsn_ie[MAX_WPA_IE_LEN];
 671         size_t rsn_ie_len;
 672         struct list_head list;
 673 };
 674
 675 enum ieee80211_state {
 676         IEEE80211_UNINITIALIZED = 0,
 677         IEEE80211_INITIALIZED,
 678         IEEE80211_ASSOCIATING,
 679         IEEE80211_ASSOCIATED,
 680         IEEE80211_AUTHENTICATING,
 681         IEEE80211_AUTHENTICATED,
 682         IEEE80211_SHUTDOWN
 683 };
 684
 685 #define DEFAULT_MAX_SCAN_AGE (15 * HZ)
 686 #define DEFAULT_FTS 2346
 687
 688
 689 #define CFG_IEEE80211_RESERVE_FCS (1<<0)
 690 #define CFG_IEEE80211_COMPUTE_FCS (1<<1)
 691
 692 struct ieee80211_device {
 693         struct net_device *dev;
 694
 695         /* Bookkeeping structures */
 696         struct net_device_stats stats;
 697         struct ieee80211_stats ieee_stats;
 698
 699         /* Probe / Beacon management */
 700         struct list_head network_free_list;
 701         struct list_head network_list;
 702         struct ieee80211_network *networks;
 703         int scans;
 704         int scan_age;
 705
 706         int iw_mode; /* operating mode (IW_MODE_*) */
 707
 708         spinlock_t lock;
 709
 710         int tx_headroom; /* Set to size of any additional room needed at front
 711                           * of allocated Tx SKBs */
 712         u32 config;
 713
 714         /* WEP and other encryption related settings at the device level */
 715         int open_wep; /* Set to 1 to allow unencrypted frames */
 716
 717         int reset_on_keychange; /* Set to 1 if the HW needs to be reset on
 718                                  * WEP key changes */
 719
 720         /* If the host performs {en,de}cryption, then set to 1 */
 721         int host_encrypt;
 722         int host_decrypt;
 723         int ieee802_1x; /* is IEEE 802.1X used */
 724
 725         /* WPA data */
 726         int wpa_enabled;
 727         int drop_unencrypted;
 728         int tkip_countermeasures;
 729         int privacy_invoked;
 730         size_t wpa_ie_len;
 731         u8 *wpa_ie;
 732
 733         struct list_head crypt_deinit_list;
 734         struct ieee80211_crypt_data *crypt[WEP_KEYS];
 735         int tx_keyidx; /* default TX key index (crypt[tx_keyidx]) */
 736         struct timer_list crypt_deinit_timer;
 737
 738         int bcrx_sta_key; /* use individual keys to override default keys even
 739                            * with RX of broad/multicast frames */
 740
 741         /* Fragmentation structures */
 742         struct ieee80211_frag_entry frag_cache[IEEE80211_FRAG_CACHE_LEN];
 743         unsigned int frag_next_idx;
 744         u16 fts; /* Fragmentation Threshold */
 745
 746         /* Association info */
 747         u8 bssid[ETH_ALEN];
 748
 749         enum ieee80211_state state;
 750
 751         int mode;       /* A, B, G */
 752         int modulation; /* CCK, OFDM */
 753         int freq_band;  /* 2.4Ghz, 5.2Ghz, Mixed */
 754         int abg_ture;   /* ABG flag              */
 755
 756         /* Callback functions */
 757         void (*set_security)(struct net_device *dev,
 758                              struct ieee80211_security *sec);
 759         int (*hard_start_xmit)(struct ieee80211_txb *txb,
 760                                struct net_device *dev);
 761         int (*reset_port)(struct net_device *dev);
 762
 763         /* This must be the last item so that it points to the data
 764          * allocated beyond this structure by alloc_ieee80211 */
 765         u8 priv[0];
 766 };
 767
 768 #define IEEE_A            (1<<0)
 769 #define IEEE_B            (1<<1)
 770 #define IEEE_G            (1<<2)
 771 #define IEEE_MODE_MASK    (IEEE_A|IEEE_B|IEEE_G)
 772
 773 extern inline void *ieee80211_priv(struct net_device *dev)
 774 {
 775         return ((struct ieee80211_device *)netdev_priv(dev))->priv;
 776 }
 777
 778 extern inline int ieee80211_is_empty_essid(const char *essid, int essid_len)
 779 {
 780         /* Single white space is for Linksys APs */
 781         if (essid_len == 1 && essid[0] == ' ')
 782                 return 1;
 783
 784         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 785         while (essid_len) {
 786                 essid_len--;
 787                 if (essid[essid_len] != '\0')
 788                         return 0;
 789         }
 790
 791         return 1;
 792 }
 793
 794 extern inline int ieee80211_is_valid_mode(struct ieee80211_device *ieee, int mode)
 795 {
 796         /*
 797          * It is possible for both access points and our device to support
 798          * combinations of modes, so as long as there is one valid combination
 799          * of ap/device supported modes, then return success
 800          *
 801          */
 802         if ((mode & IEEE_A) &&
 803             (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
 804             (ieee->freq_band & IEEE80211_52GHZ_BAND))
 805                 return 1;
 806
 807         if ((mode & IEEE_G) &&
 808             (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
 809             (ieee->freq_band & IEEE80211_24GHZ_BAND))
 810                 return 1;
 811
 812         if ((mode & IEEE_B) &&
 813             (ieee->modulation & IEEE80211_CCK_MODULATION) &&
 814             (ieee->freq_band & IEEE80211_24GHZ_BAND))
 815                 return 1;
 816
 817         return 0;
 818 }
 819
 820 extern inline int ieee80211_get_hdrlen(u16 fc)
 821 {
 822         int hdrlen = IEEE80211_3ADDR_LEN;
 823
 824         switch (WLAN_FC_GET_TYPE(fc)) {
 825         case IEEE80211_FTYPE_DATA:
 826                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 827                         hdrlen = IEEE80211_4ADDR_LEN;
 828                 break;
 829         case IEEE80211_FTYPE_CTL:
 830                 switch (WLAN_FC_GET_STYPE(fc)) {
 831                 case IEEE80211_STYPE_CTS:
 832                 case IEEE80211_STYPE_ACK:
 833                         hdrlen = IEEE80211_1ADDR_LEN;
 834                         break;
 835                 default:
 836                         hdrlen = IEEE80211_2ADDR_LEN;
 837                         break;
 838                 }
 839                 break;
 840         }
 841
 842         return hdrlen;
 843 }
 844
 845
 846
 847 /* ieee80211.c */
 848 extern void free_ieee80211(struct net_device *dev);
 849 extern struct net_device *alloc_ieee80211(int sizeof_priv);
 850
 851 extern int ieee80211_set_encryption(struct ieee80211_device *ieee);
 852
 853 /* ieee80211_tx.c */
 854
 855
 856 extern int ieee80211_xmit(struct sk_buff *skb,
 857                           struct net_device *dev);
 858 extern void ieee80211_txb_free(struct ieee80211_txb *);
 859
 860
 861 /* ieee80211_rx.c */
 862 extern int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 863                         struct ieee80211_rx_stats *rx_stats);
 864 extern void ieee80211_rx_mgt(struct ieee80211_device *ieee,
 865                              struct ieee80211_hdr *header,
 866                              struct ieee80211_rx_stats *stats);
 867
 868 /* iee80211_wx.c */
 869 extern int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
 870                                  struct iw_request_info *info,
 871                                  union iwreq_data *wrqu, char *key);
 872 extern int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 873                                    struct iw_request_info *info,
 874                                    union iwreq_data *wrqu, char *key);
 875 extern int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
 876                                    struct iw_request_info *info,
 877                                    union iwreq_data *wrqu, char *key);
 878
 879
 880 extern inline void ieee80211_increment_scans(struct ieee80211_device *ieee)
 881 {
 882         ieee->scans++;
 883 }
 884
 885 extern inline int ieee80211_get_scans(struct ieee80211_device *ieee)
 886 {
 887         return ieee->scans;
 888 }
 889
 890
 891 #endif /* IEEE80211_H */