contrib/hostapd-0.5.8/ieee802_11.h

   1 /*
   2  * hostapd / IEEE 802.11 Management
   3  * Copyright (c) 2002-2006, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #ifndef IEEE802_11_H
  16 #define IEEE802_11_H
  17
  18 /* IEEE 802.11 defines */
  19
  20 #define WLAN_FC_PVER (BIT(1) | BIT(0))
  21 #define WLAN_FC_TODS BIT(8)
  22 #define WLAN_FC_FROMDS BIT(9)
  23 #define WLAN_FC_MOREFRAG BIT(10)
  24 #define WLAN_FC_RETRY BIT(11)
  25 #define WLAN_FC_PWRMGT BIT(12)
  26 #define WLAN_FC_MOREDATA BIT(13)
  27 #define WLAN_FC_ISWEP BIT(14)
  28 #define WLAN_FC_ORDER BIT(15)
  29
  30 #define WLAN_FC_GET_TYPE(fc) (((fc) & (BIT(3) | BIT(2))) >> 2)
  31 #define WLAN_FC_GET_STYPE(fc) \
  32         (((fc) & (BIT(7) | BIT(6) | BIT(5) | BIT(4))) >> 4)
  33
  34 #define WLAN_GET_SEQ_FRAG(seq) ((seq) & (BIT(3) | BIT(2) | BIT(1) | BIT(0)))
  35 #define WLAN_GET_SEQ_SEQ(seq) \
  36         (((seq) & (~(BIT(3) | BIT(2) | BIT(1) | BIT(0)))) >> 4)
  37
  38 #define WLAN_FC_TYPE_MGMT 0
  39 #define WLAN_FC_TYPE_CTRL 1
  40 #define WLAN_FC_TYPE_DATA 2
  41
  42 /* management */
  43 #define WLAN_FC_STYPE_ASSOC_REQ 0
  44 #define WLAN_FC_STYPE_ASSOC_RESP 1
  45 #define WLAN_FC_STYPE_REASSOC_REQ 2
  46 #define WLAN_FC_STYPE_REASSOC_RESP 3
  47 #define WLAN_FC_STYPE_PROBE_REQ 4
  48 #define WLAN_FC_STYPE_PROBE_RESP 5
  49 #define WLAN_FC_STYPE_BEACON 8
  50 #define WLAN_FC_STYPE_ATIM 9
  51 #define WLAN_FC_STYPE_DISASSOC 10
  52 #define WLAN_FC_STYPE_AUTH 11
  53 #define WLAN_FC_STYPE_DEAUTH 12
  54 #define WLAN_FC_STYPE_ACTION 13
  55
  56 /* control */
  57 #define WLAN_FC_STYPE_PSPOLL 10
  58 #define WLAN_FC_STYPE_RTS 11
  59 #define WLAN_FC_STYPE_CTS 12
  60 #define WLAN_FC_STYPE_ACK 13
  61 #define WLAN_FC_STYPE_CFEND 14
  62 #define WLAN_FC_STYPE_CFENDACK 15
  63
  64 /* data */
  65 #define WLAN_FC_STYPE_DATA 0
  66 #define WLAN_FC_STYPE_DATA_CFACK 1
  67 #define WLAN_FC_STYPE_DATA_CFPOLL 2
  68 #define WLAN_FC_STYPE_DATA_CFACKPOLL 3
  69 #define WLAN_FC_STYPE_NULLFUNC 4
  70 #define WLAN_FC_STYPE_CFACK 5
  71 #define WLAN_FC_STYPE_CFPOLL 6
  72 #define WLAN_FC_STYPE_CFACKPOLL 7
  73 #define WLAN_FC_STYPE_QOS_DATA 8
  74
  75 /* Authentication algorithms */
  76 #define WLAN_AUTH_OPEN 0
  77 #define WLAN_AUTH_SHARED_KEY 1
  78
  79 #define WLAN_AUTH_CHALLENGE_LEN 128
  80
  81 #define WLAN_CAPABILITY_ESS BIT(0)
  82 #define WLAN_CAPABILITY_IBSS BIT(1)
  83 #define WLAN_CAPABILITY_CF_POLLABLE BIT(2)
  84 #define WLAN_CAPABILITY_CF_POLL_REQUEST BIT(3)
  85 #define WLAN_CAPABILITY_PRIVACY BIT(4)
  86 #define WLAN_CAPABILITY_SHORT_PREAMBLE BIT(5)
  87 #define WLAN_CAPABILITY_PBCC BIT(6)
  88 #define WLAN_CAPABILITY_CHANNEL_AGILITY BIT(7)
  89 #define WLAN_CAPABILITY_SPECTRUM_MGMT BIT(8)
  90 #define WLAN_CAPABILITY_SHORT_SLOT_TIME BIT(10)
  91 #define WLAN_CAPABILITY_DSSS_OFDM BIT(13)
  92
  93 /* Status codes */
  94 #define WLAN_STATUS_SUCCESS 0
  95 #define WLAN_STATUS_UNSPECIFIED_FAILURE 1
  96 #define WLAN_STATUS_CAPS_UNSUPPORTED 10
  97 #define WLAN_STATUS_REASSOC_NO_ASSOC 11
  98 #define WLAN_STATUS_ASSOC_DENIED_UNSPEC 12
  99 #define WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG 13
 100 #define WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION 14
 101 #define WLAN_STATUS_CHALLENGE_FAIL 15
 102 #define WLAN_STATUS_AUTH_TIMEOUT 16
 103 #define WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA 17
 104 #define WLAN_STATUS_ASSOC_DENIED_RATES 18
 105 /* IEEE 802.11b */
 106 #define WLAN_STATUS_ASSOC_DENIED_NOSHORT 19
 107 #define WLAN_STATUS_ASSOC_DENIED_NOPBCC 20
 108 #define WLAN_STATUS_ASSOC_DENIED_NOAGILITY 21
 109 /* IEEE 802.11h */
 110 #define WLAN_STATUS_SPEC_MGMT_REQUIRED 22
 111 #define WLAN_STATUS_PWR_CAPABILITY_NOT_VALID 23
 112 #define WLAN_STATUS_SUPPORTED_CHANNEL_NOT_VALID 24
 113 /* IEEE 802.11i */
 114 #define WLAN_STATUS_INVALID_IE 40
 115 #define WLAN_STATUS_GROUP_CIPHER_NOT_VALID 41
 116 #define WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID 42
 117 #define WLAN_STATUS_AKMP_NOT_VALID 43
 118 #define WLAN_STATUS_UNSUPPORTED_RSN_IE_VERSION 44
 119 #define WLAN_STATUS_INVALID_RSN_IE_CAPAB 45
 120 #define WLAN_STATUS_CIPHER_REJECTED_PER_POLICY 46
 121
 122 /* Reason codes */
 123 #define WLAN_REASON_UNSPECIFIED 1
 124 #define WLAN_REASON_PREV_AUTH_NOT_VALID 2
 125 #define WLAN_REASON_DEAUTH_LEAVING 3
 126 #define WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY 4
 127 #define WLAN_REASON_DISASSOC_AP_BUSY 5
 128 #define WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA 6
 129 #define WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA 7
 130 #define WLAN_REASON_DISASSOC_STA_HAS_LEFT 8
 131 #define WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH 9
 132 /* IEEE 802.11i */
 133 #define WLAN_REASON_INVALID_IE 13
 134 #define WLAN_REASON_MICHAEL_MIC_FAILURE 14
 135 #define WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT 15
 136 #define WLAN_REASON_GROUP_KEY_UPDATE_TIMEOUT 16
 137 #define WLAN_REASON_IE_IN_4WAY_DIFFERS 17
 138 #define WLAN_REASON_GROUP_CIPHER_NOT_VALID 18
 139 #define WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID 19
 140 #define WLAN_REASON_AKMP_NOT_VALID 20
 141 #define WLAN_REASON_UNSUPPORTED_RSN_IE_VERSION 21
 142 #define WLAN_REASON_INVALID_RSN_IE_CAPAB 22
 143 #define WLAN_REASON_IEEE_802_1X_AUTH_FAILED 23
 144 #define WLAN_REASON_CIPHER_SUITE_REJECTED 24
 145
 146
 147 /* Information Element IDs */
 148 #define WLAN_EID_SSID 0
 149 #define WLAN_EID_SUPP_RATES 1
 150 #define WLAN_EID_FH_PARAMS 2
 151 #define WLAN_EID_DS_PARAMS 3
 152 #define WLAN_EID_CF_PARAMS 4
 153 #define WLAN_EID_TIM 5
 154 #define WLAN_EID_IBSS_PARAMS 6
 155 #define WLAN_EID_COUNTRY 7
 156 #define WLAN_EID_CHALLENGE 16
 157 /* EIDs defined by IEEE 802.11h - START */
 158 #define WLAN_EID_PWR_CONSTRAINT 32
 159 #define WLAN_EID_PWR_CAPABILITY 33
 160 #define WLAN_EID_TPC_REQUEST 34
 161 #define WLAN_EID_TPC_REPORT 35
 162 #define WLAN_EID_SUPPORTED_CHANNELS 36
 163 #define WLAN_EID_CHANNEL_SWITCH 37
 164 #define WLAN_EID_MEASURE_REQUEST 38
 165 #define WLAN_EID_MEASURE_REPORT 39
 166 #define WLAN_EID_QUITE 40
 167 #define WLAN_EID_IBSS_DFS 41
 168 /* EIDs defined by IEEE 802.11h - END */
 169 #define WLAN_EID_ERP_INFO 42
 170 #define WLAN_EID_RSN 48
 171 #define WLAN_EID_EXT_SUPP_RATES 50
 172 #define WLAN_EID_GENERIC 221
 173 #define WLAN_EID_VENDOR_SPECIFIC 221
 174
 175
 176 struct ieee80211_mgmt {
 177         u16 frame_control;
 178         u16 duration;
 179         u8 da[6];
 180         u8 sa[6];
 181         u8 bssid[6];
 182         u16 seq_ctrl;
 183         union {
 184                 struct {
 185                         u16 auth_alg;
 186                         u16 auth_transaction;
 187                         u16 status_code;
 188                         /* possibly followed by Challenge text */
 189                         u8 variable[0];
 190                 } __attribute__ ((packed)) auth;
 191                 struct {
 192                         u16 reason_code;
 193                 } __attribute__ ((packed)) deauth;
 194                 struct {
 195                         u16 capab_info;
 196                         u16 listen_interval;
 197                         /* followed by SSID and Supported rates */
 198                         u8 variable[0];
 199                 } __attribute__ ((packed)) assoc_req;
 200                 struct {
 201                         u16 capab_info;
 202                         u16 status_code;
 203                         u16 aid;
 204                         /* followed by Supported rates */
 205                         u8 variable[0];
 206                 } __attribute__ ((packed)) assoc_resp, reassoc_resp;
 207                 struct {
 208                         u16 capab_info;
 209                         u16 listen_interval;
 210                         u8 current_ap[6];
 211                         /* followed by SSID and Supported rates */
 212                         u8 variable[0];
 213                 } __attribute__ ((packed)) reassoc_req;
 214                 struct {
 215                         u16 reason_code;
 216                 } __attribute__ ((packed)) disassoc;
 217                 struct {
 218                         /* only variable items: SSID, Supported rates */
 219                         u8 variable[0];
 220                 } __attribute__ ((packed)) probe_req;
 221                 struct {
 222                         u8 timestamp[8];
 223                         u16 beacon_int;
 224                         u16 capab_info;
 225                         /* followed by some of SSID, Supported rates,
 226                          * FH Params, DS Params, CF Params, IBSS Params */
 227                         u8 variable[0];
 228                 } __attribute__ ((packed)) probe_resp;
 229                 struct {
 230                         u8 timestamp[8];
 231                         u16 beacon_int;
 232                         u16 capab_info;
 233                         /* followed by some of SSID, Supported rates,
 234                          * FH Params, DS Params, CF Params, IBSS Params, TIM */
 235                         u8 variable[0];
 236                 } __attribute__ ((packed)) beacon;
 237                 struct {
 238                         u8 category;
 239                         union {
 240                                 struct {
 241                                         u8 action_code;
 242                                         u8 dialog_token;
 243                                         u8 status_code;
 244                                         u8 variable[0];
 245                                 } __attribute__ ((packed)) wme_action;
 246                                 struct{
 247                                         u8 action_code;
 248                                         u8 element_id;
 249                                         u8 length;
 250                                         u8 switch_mode;
 251                                         u8 new_chan;
 252                                         u8 switch_count;
 253                                 } __attribute__ ((packed)) chan_switch;
 254                         } u;
 255                 } __attribute__ ((packed)) action;
 256         } u;
 257 } __attribute__ ((packed));
 258
 259
 260 #define ERP_INFO_NON_ERP_PRESENT BIT(0)
 261 #define ERP_INFO_USE_PROTECTION BIT(1)
 262 #define ERP_INFO_BARKER_PREAMBLE_MODE BIT(2)
 263
 264 /* Parsed Information Elements */
 265 struct ieee802_11_elems {
 266         u8 *ssid;
 267         u8 ssid_len;
 268         u8 *supp_rates;
 269         u8 supp_rates_len;
 270         u8 *fh_params;
 271         u8 fh_params_len;
 272         u8 *ds_params;
 273         u8 ds_params_len;
 274         u8 *cf_params;
 275         u8 cf_params_len;
 276         u8 *tim;
 277         u8 tim_len;
 278         u8 *ibss_params;
 279         u8 ibss_params_len;
 280         u8 *challenge;
 281         u8 challenge_len;
 282         u8 *erp_info;
 283         u8 erp_info_len;
 284         u8 *ext_supp_rates;
 285         u8 ext_supp_rates_len;
 286         u8 *wpa_ie;
 287         u8 wpa_ie_len;
 288         u8 *rsn_ie;
 289         u8 rsn_ie_len;
 290         u8 *wme;
 291         u8 wme_len;
 292         u8 *wme_tspec;
 293         u8 wme_tspec_len;
 294         u8 *power_cap;
 295         u8 power_cap_len;
 296         u8 *supp_channels;
 297         u8 supp_channels_len;
 298 };
 299
 300 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
 301
 302
 303 struct hostapd_frame_info {
 304         u32 phytype;
 305         u32 channel;
 306         u32 datarate;
 307         u32 ssi_signal;
 308
 309         unsigned int passive_scan:1;
 310 };
 311
 312
 313 void ieee802_11_send_deauth(struct hostapd_data *hapd, u8 *addr, u16 reason);
 314 void ieee802_11_mgmt(struct hostapd_data *hapd, u8 *buf, size_t len,
 315                      u16 stype, struct hostapd_frame_info *fi);
 316 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, u8 *buf, size_t len,
 317                         u16 stype, int ok);
 318 ParseRes ieee802_11_parse_elems(struct hostapd_data *hapd, u8 *start,
 319                                 size_t len,
 320                                 struct ieee802_11_elems *elems,
 321                                 int show_errors);
 322 void ieee802_11_print_ssid(const u8 *ssid, u8 len);
 323 void ieee80211_michael_mic_failure(struct hostapd_data *hapd, const u8 *addr,
 324                                    int local);
 325 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen);
 326 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
 327                            char *buf, size_t buflen);
 328 u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
 329                            int probe);
 330 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid);
 331 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid);
 332
 333 #endif /* IEEE802_11_H */