/* * IEEE 802.11 defines * * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen * * Copyright (c) 2002-2003, Jouni Malinen * Copyright (c) 2005, Devicescape Software, Inc. * Copyright (c) 2006, Michael Wu * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef IEEE80211_H #define IEEE80211_H #include #include #define FCS_LEN 4 #define IEEE80211_FCTL_VERS 0x0003 #define IEEE80211_FCTL_FTYPE 0x000c #define IEEE80211_FCTL_STYPE 0x00f0 #define IEEE80211_FCTL_TODS 0x0100 #define IEEE80211_FCTL_FROMDS 0x0200 #define IEEE80211_FCTL_MOREFRAGS 0x0400 #define IEEE80211_FCTL_RETRY 0x0800 #define IEEE80211_FCTL_PM 0x1000 #define IEEE80211_FCTL_MOREDATA 0x2000 #define IEEE80211_FCTL_PROTECTED 0x4000 #define IEEE80211_FCTL_ORDER 0x8000 #define IEEE80211_SCTL_FRAG 0x000F #define IEEE80211_SCTL_SEQ 0xFFF0 #define IEEE80211_FTYPE_MGMT 0x0000 #define IEEE80211_FTYPE_CTL 0x0004 #define IEEE80211_FTYPE_DATA 0x0008 /* management */ #define IEEE80211_STYPE_ASSOC_REQ 0x0000 #define IEEE80211_STYPE_ASSOC_RESP 0x0010 #define IEEE80211_STYPE_REASSOC_REQ 0x0020 #define IEEE80211_STYPE_REASSOC_RESP 0x0030 #define IEEE80211_STYPE_PROBE_REQ 0x0040 #define IEEE80211_STYPE_PROBE_RESP 0x0050 #define IEEE80211_STYPE_BEACON 0x0080 #define IEEE80211_STYPE_ATIM 0x0090 #define IEEE80211_STYPE_DISASSOC 0x00A0 #define IEEE80211_STYPE_AUTH 0x00B0 #define IEEE80211_STYPE_DEAUTH 0x00C0 #define IEEE80211_STYPE_ACTION 0x00D0 /* control */ #define IEEE80211_STYPE_BACK_REQ 0x0080 #define IEEE80211_STYPE_BACK 0x0090 #define IEEE80211_STYPE_PSPOLL 0x00A0 #define IEEE80211_STYPE_RTS 0x00B0 #define IEEE80211_STYPE_CTS 0x00C0 #define IEEE80211_STYPE_ACK 0x00D0 #define IEEE80211_STYPE_CFEND 0x00E0 #define IEEE80211_STYPE_CFENDACK 0x00F0 /* data */ #define IEEE80211_STYPE_DATA 0x0000 #define IEEE80211_STYPE_DATA_CFACK 0x0010 #define IEEE80211_STYPE_DATA_CFPOLL 0x0020 #define IEEE80211_STYPE_DATA_CFACKPOLL 0x0030 #define IEEE80211_STYPE_NULLFUNC 0x0040 #define IEEE80211_STYPE_CFACK 0x0050 #define IEEE80211_STYPE_CFPOLL 0x0060 #define IEEE80211_STYPE_CFACKPOLL 0x0070 #define IEEE80211_STYPE_QOS_DATA 0x0080 #define IEEE80211_STYPE_QOS_DATA_CFACK 0x0090 #define IEEE80211_STYPE_QOS_DATA_CFPOLL 0x00A0 #define IEEE80211_STYPE_QOS_DATA_CFACKPOLL 0x00B0 #define IEEE80211_STYPE_QOS_NULLFUNC 0x00C0 #define IEEE80211_STYPE_QOS_CFACK 0x00D0 #define IEEE80211_STYPE_QOS_CFPOLL 0x00E0 #define IEEE80211_STYPE_QOS_CFACKPOLL 0x00F0 /* miscellaneous IEEE 802.11 constants */ #define IEEE80211_MAX_FRAG_THRESHOLD 2352 #define IEEE80211_MAX_RTS_THRESHOLD 2353 #define IEEE80211_MAX_AID 2007 #define IEEE80211_MAX_TIM_LEN 251 /* Maximum size for the MA-UNITDATA primitive, 802.11 standard section 6.2.1.1.2. 802.11e clarifies the figure in section 7.1.2. The frame body is up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */ #define IEEE80211_MAX_DATA_LEN 2304 /* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */ #define IEEE80211_MAX_FRAME_LEN 2352 #define IEEE80211_MAX_SSID_LEN 32 #define IEEE80211_MAX_MESH_ID_LEN 32 struct ieee80211_hdr { __le16 frame_control; __le16 duration_id; u8 addr1[6]; u8 addr2[6]; u8 addr3[6]; __le16 seq_ctrl; u8 addr4[6]; } __attribute__ ((packed)); struct ieee80211s_hdr { u8 flags; u8 ttl; __le32 seqnum; u8 eaddr1[6]; u8 eaddr2[6]; u8 eaddr3[6]; } __attribute__ ((packed)); struct ieee80211_mgmt { __le16 frame_control; __le16 duration; u8 da[6]; u8 sa[6]; u8 bssid[6]; __le16 seq_ctrl; union { struct { __le16 auth_alg; __le16 auth_transaction; __le16 status_code; /* possibly followed by Challenge text */ u8 variable[0]; } __attribute__ ((packed)) auth; struct { __le16 reason_code; } __attribute__ ((packed)) deauth; struct { __le16 capab_info; __le16 listen_interval; /* followed by SSID and Supported rates */ u8 variable[0]; } __attribute__ ((packed)) assoc_req; struct { __le16 capab_info; __le16 status_code; __le16 aid; /* followed by Supported rates */ u8 variable[0]; } __attribute__ ((packed)) assoc_resp, reassoc_resp; struct { __le16 capab_info; __le16 listen_interval; u8 current_ap[6]; /* followed by SSID and Supported rates */ u8 variable[0]; } __attribute__ ((packed)) reassoc_req; struct { __le16 reason_code; } __attribute__ ((packed)) disassoc; struct { __le64 timestamp; __le16 beacon_int; __le16 capab_info; /* followed by some of SSID, Supported rates, * FH Params, DS Params, CF Params, IBSS Params, TIM */ u8 variable[0]; } __attribute__ ((packed)) beacon; struct { /* only variable items: SSID, Supported rates */ u8 variable[0]; } __attribute__ ((packed)) probe_req; struct { __le64 timestamp; __le16 beacon_int; __le16 capab_info; /* followed by some of SSID, Supported rates, * FH Params, DS Params, CF Params, IBSS Params */ u8 variable[0]; } __attribute__ ((packed)) probe_resp; struct { u8 category; union { struct { u8 action_code; u8 dialog_token; u8 status_code; u8 variable[0]; } __attribute__ ((packed)) wme_action; struct{ u8 action_code; u8 element_id; u8 length; u8 switch_mode; u8 new_chan; u8 switch_count; } __attribute__((packed)) chan_switch; struct{ u8 action_code; u8 dialog_token; __le16 capab; __le16 timeout; __le16 start_seq_num; } __attribute__((packed)) addba_req; struct{ u8 action_code; u8 dialog_token; __le16 status; __le16 capab; __le16 timeout; } __attribute__((packed)) addba_resp; struct{ u8 action_code; __le16 params; __le16 reason_code; } __attribute__((packed)) delba; struct{ u8 action_code; /* capab_info for open and confirm, * reason for close */ __le16 aux; /* Followed in plink_confirm by status * code, AID and supported rates, * and directly by supported rates in * plink_open and plink_close */ u8 variable[0]; } __attribute__((packed)) plink_action; struct{ u8 action_code; u8 variable[0]; } __attribute__((packed)) mesh_action; } u; } __attribute__ ((packed)) action; } u; } __attribute__ ((packed)); /* Control frames */ struct ieee80211_rts { __le16 frame_control; __le16 duration; u8 ra[6]; u8 ta[6]; } __attribute__ ((packed)); struct ieee80211_cts { __le16 frame_control; __le16 duration; u8 ra[6]; } __attribute__ ((packed)); /** * struct ieee80211_bar - HT Block Ack Request * * This structure refers to "HT BlockAckReq" as * described in 802.11n draft section 7.2.1.7.1 */ struct ieee80211_bar { __le16 frame_control; __le16 duration; __u8 ra[6]; __u8 ta[6]; __le16 control; __le16 start_seq_num; } __attribute__((packed)); /** * struct ieee80211_ht_cap - HT capabilities * * This structure refers to "HT capabilities element" as * described in 802.11n draft section 7.3.2.52 */ struct ieee80211_ht_cap { __le16 cap_info; u8 ampdu_params_info; u8 supp_mcs_set[16]; __le16 extended_ht_cap_info; __le32 tx_BF_cap_info; u8 antenna_selection_info; } __attribute__ ((packed)); /** * struct ieee80211_ht_cap - HT additional information * * This structure refers to "HT information element" as * described in 802.11n draft section 7.3.2.53 */ struct ieee80211_ht_addt_info { u8 control_chan; u8 ht_param; __le16 operation_mode; __le16 stbc_param; u8 basic_set[16]; } __attribute__ ((packed)); /* 802.11n HT capabilities masks */ #define IEEE80211_HT_CAP_SUP_WIDTH 0x0002 #define IEEE80211_HT_CAP_MIMO_PS 0x000C #define IEEE80211_HT_CAP_GRN_FLD 0x0010 #define IEEE80211_HT_CAP_SGI_20 0x0020 #define IEEE80211_HT_CAP_SGI_40 0x0040 #define IEEE80211_HT_CAP_DELAY_BA 0x0400 #define IEEE80211_HT_CAP_MAX_AMSDU 0x0800 #define IEEE80211_HT_CAP_AMPDU_FACTOR 0x03 #define IEEE80211_HT_CAP_AMPDU_DENSITY 0x1C /* 802.11n HT IE masks */ #define IEEE80211_HT_IE_CHA_SEC_OFFSET 0x03 #define IEEE80211_HT_IE_CHA_WIDTH 0x04 #define IEEE80211_HT_IE_HT_PROTECTION 0x0003 #define IEEE80211_HT_IE_NON_GF_STA_PRSNT 0x0004 #define IEEE80211_HT_IE_NON_HT_STA_PRSNT 0x0010 /* MIMO Power Save Modes */ #define WLAN_HT_CAP_MIMO_PS_STATIC 0 #define WLAN_HT_CAP_MIMO_PS_DYNAMIC 1 #define WLAN_HT_CAP_MIMO_PS_INVALID 2 #define WLAN_HT_CAP_MIMO_PS_DISABLED 3 /* Authentication algorithms */ #define WLAN_AUTH_OPEN 0 #define WLAN_AUTH_SHARED_KEY 1 #define WLAN_AUTH_FAST_BSS_TRANSITION 2 #define WLAN_AUTH_LEAP 128 #define WLAN_AUTH_CHALLENGE_LEN 128 #define WLAN_CAPABILITY_ESS (1<<0) #define WLAN_CAPABILITY_IBSS (1<<1) #define WLAN_CAPABILITY_CF_POLLABLE (1<<2) #define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3) #define WLAN_CAPABILITY_PRIVACY (1<<4) #define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5) #define WLAN_CAPABILITY_PBCC (1<<6) #define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7) /* 802.11h */ #define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8) #define WLAN_CAPABILITY_QOS (1<<9) #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10) #define WLAN_CAPABILITY_DSSS_OFDM (1<<13) /* 802.11g ERP information element */ #define WLAN_ERP_NON_ERP_PRESENT (1<<0) #define WLAN_ERP_USE_PROTECTION (1<<1) #define WLAN_ERP_BARKER_PREAMBLE (1<<2) /* WLAN_ERP_BARKER_PREAMBLE values */ enum { WLAN_ERP_PREAMBLE_SHORT = 0, WLAN_ERP_PREAMBLE_LONG = 1, }; /* Status codes */ enum ieee80211_statuscode { WLAN_STATUS_SUCCESS = 0, WLAN_STATUS_UNSPECIFIED_FAILURE = 1, WLAN_STATUS_CAPS_UNSUPPORTED = 10, WLAN_STATUS_REASSOC_NO_ASSOC = 11, WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12, WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13, WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14, WLAN_STATUS_CHALLENGE_FAIL = 15, WLAN_STATUS_AUTH_TIMEOUT = 16, WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17, WLAN_STATUS_ASSOC_DENIED_RATES = 18, /* 802.11b */ WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19, WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20, WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21, /* 802.11h */ WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22, WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23, WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24, /* 802.11g */ WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25, WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26, /* 802.11i */ WLAN_STATUS_INVALID_IE = 40, WLAN_STATUS_INVALID_GROUP_CIPHER = 41, WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42, WLAN_STATUS_INVALID_AKMP = 43, WLAN_STATUS_UNSUPP_RSN_VERSION = 44, WLAN_STATUS_INVALID_RSN_IE_CAP = 45, WLAN_STATUS_CIPHER_SUITE_REJECTED = 46, /* 802.11e */ WLAN_STATUS_UNSPECIFIED_QOS = 32, WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33, WLAN_STATUS_ASSOC_DENIED_LOWACK = 34, WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35, WLAN_STATUS_REQUEST_DECLINED = 37, WLAN_STATUS_INVALID_QOS_PARAM = 38, WLAN_STATUS_CHANGE_TSPEC = 39, WLAN_STATUS_WAIT_TS_DELAY = 47, WLAN_STATUS_NO_DIRECT_LINK = 48, WLAN_STATUS_STA_NOT_PRESENT = 49, WLAN_STATUS_STA_NOT_QSTA = 50, }; /* Reason codes */ enum ieee80211_reasoncode { WLAN_REASON_UNSPECIFIED = 1, WLAN_REASON_PREV_AUTH_NOT_VALID = 2, WLAN_REASON_DEAUTH_LEAVING = 3, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4, WLAN_REASON_DISASSOC_AP_BUSY = 5, WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7, WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8, WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9, /* 802.11h */ WLAN_REASON_DISASSOC_BAD_POWER = 10, WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11, /* 802.11i */ WLAN_REASON_INVALID_IE = 13, WLAN_REASON_MIC_FAILURE = 14, WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15, WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16, WLAN_REASON_IE_DIFFERENT = 17, WLAN_REASON_INVALID_GROUP_CIPHER = 18, WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19, WLAN_REASON_INVALID_AKMP = 20, WLAN_REASON_UNSUPP_RSN_VERSION = 21, WLAN_REASON_INVALID_RSN_IE_CAP = 22, WLAN_REASON_IEEE8021X_FAILED = 23, WLAN_REASON_CIPHER_SUITE_REJECTED = 24, /* 802.11e */ WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32, WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33, WLAN_REASON_DISASSOC_LOW_ACK = 34, WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35, WLAN_REASON_QSTA_LEAVE_QBSS = 36, WLAN_REASON_QSTA_NOT_USE = 37, WLAN_REASON_QSTA_REQUIRE_SETUP = 38, WLAN_REASON_QSTA_TIMEOUT = 39, WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45, }; /* Information Element IDs */ enum ieee80211_eid { WLAN_EID_SSID = 0, WLAN_EID_SUPP_RATES = 1, WLAN_EID_FH_PARAMS = 2, WLAN_EID_DS_PARAMS = 3, WLAN_EID_CF_PARAMS = 4, WLAN_EID_TIM = 5, WLAN_EID_IBSS_PARAMS = 6, WLAN_EID_CHALLENGE = 16, /* 802.11d */ WLAN_EID_COUNTRY = 7, WLAN_EID_HP_PARAMS = 8, WLAN_EID_HP_TABLE = 9, WLAN_EID_REQUEST = 10, /* 802.11e */ WLAN_EID_QBSS_LOAD = 11, WLAN_EID_EDCA_PARAM_SET = 12, WLAN_EID_TSPEC = 13, WLAN_EID_TCLAS = 14, WLAN_EID_SCHEDULE = 15, WLAN_EID_TS_DELAY = 43, WLAN_EID_TCLAS_PROCESSING = 44, WLAN_EID_QOS_CAPA = 46, /* 802.11s * * All mesh EID numbers are pending IEEE 802.11 ANA approval. * The numbers have been incremented from those suggested in * 802.11s/D2.0 so that MESH_CONFIG does not conflict with * EXT_SUPP_RATES. */ WLAN_EID_MESH_CONFIG = 51, WLAN_EID_MESH_ID = 52, WLAN_EID_PEER_LINK = 55, WLAN_EID_PREQ = 68, WLAN_EID_PREP = 69, WLAN_EID_PERR = 70, /* 802.11h */ WLAN_EID_PWR_CONSTRAINT = 32, WLAN_EID_PWR_CAPABILITY = 33, WLAN_EID_TPC_REQUEST = 34, WLAN_EID_TPC_REPORT = 35, WLAN_EID_SUPPORTED_CHANNELS = 36, WLAN_EID_CHANNEL_SWITCH = 37, WLAN_EID_MEASURE_REQUEST = 38, WLAN_EID_MEASURE_REPORT = 39, WLAN_EID_QUIET = 40, WLAN_EID_IBSS_DFS = 41, /* 802.11g */ WLAN_EID_ERP_INFO = 42, WLAN_EID_EXT_SUPP_RATES = 50, /* 802.11n */ WLAN_EID_HT_CAPABILITY = 45, WLAN_EID_HT_EXTRA_INFO = 61, /* 802.11i */ WLAN_EID_RSN = 48, WLAN_EID_WPA = 221, WLAN_EID_GENERIC = 221, WLAN_EID_VENDOR_SPECIFIC = 221, WLAN_EID_QOS_PARAMETER = 222 }; /* Action category code */ enum ieee80211_category { WLAN_CATEGORY_SPECTRUM_MGMT = 0, WLAN_CATEGORY_QOS = 1, WLAN_CATEGORY_DLS = 2, WLAN_CATEGORY_BACK = 3, WLAN_CATEGORY_WMM = 17, }; /* BACK action code */ enum ieee80211_back_actioncode { WLAN_ACTION_ADDBA_REQ = 0, WLAN_ACTION_ADDBA_RESP = 1, WLAN_ACTION_DELBA = 2, }; /* BACK (block-ack) parties */ enum ieee80211_back_parties { WLAN_BACK_RECIPIENT = 0, WLAN_BACK_INITIATOR = 1, WLAN_BACK_TIMER = 2, }; /* A-MSDU 802.11n */ #define IEEE80211_QOS_CONTROL_A_MSDU_PRESENT 0x0080 /* cipher suite selectors */ #define WLAN_CIPHER_SUITE_USE_GROUP 0x000FAC00 #define WLAN_CIPHER_SUITE_WEP40 0x000FAC01 #define WLAN_CIPHER_SUITE_TKIP 0x000FAC02 /* reserved: 0x000FAC03 */ #define WLAN_CIPHER_SUITE_CCMP 0x000FAC04 #define WLAN_CIPHER_SUITE_WEP104 0x000FAC05 #define WLAN_MAX_KEY_LEN 32 /** * ieee80211_get_SA - get pointer to SA * * Given an 802.11 frame, this function returns the offset * to the source address (SA). It does not verify that the * header is long enough to contain the address, and the * header must be long enough to contain the frame control * field. * * @hdr: the frame */ static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr) { __le16 fc = hdr->frame_control; fc &= cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS); switch (fc) { case __constant_cpu_to_le16(IEEE80211_FCTL_FROMDS): return hdr->addr3; case __constant_cpu_to_le16(IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS): return hdr->addr4; default: return hdr->addr2; } } /** * ieee80211_get_DA - get pointer to DA * * Given an 802.11 frame, this function returns the offset * to the destination address (DA). It does not verify that * the header is long enough to contain the address, and the * header must be long enough to contain the frame control * field. * * @hdr: the frame */ static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr) { __le16 fc = hdr->frame_control; fc &= cpu_to_le16(IEEE80211_FCTL_TODS); if (fc) return hdr->addr3; else return hdr->addr1; } /** * ieee80211_get_morefrag - determine whether the MOREFRAGS bit is set * * This function determines whether the "more fragments" bit is set * in the frame. * * @hdr: the frame */ static inline int ieee80211_get_morefrag(struct ieee80211_hdr *hdr) { __le16 fc = hdr->frame_control; return !!(fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)); } #endif /* IEEE80211_H */