334 lines
9.3 KiB
C
334 lines
9.3 KiB
C
/*
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* hostapd / IEEE 802.11 Management
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* Copyright (c) 2002-2006, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#ifndef IEEE802_11_H
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#define IEEE802_11_H
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/* IEEE 802.11 defines */
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#define WLAN_FC_PVER (BIT(1) | BIT(0))
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#define WLAN_FC_TODS BIT(8)
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#define WLAN_FC_FROMDS BIT(9)
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#define WLAN_FC_MOREFRAG BIT(10)
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#define WLAN_FC_RETRY BIT(11)
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#define WLAN_FC_PWRMGT BIT(12)
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#define WLAN_FC_MOREDATA BIT(13)
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#define WLAN_FC_ISWEP BIT(14)
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#define WLAN_FC_ORDER BIT(15)
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#define WLAN_FC_GET_TYPE(fc) (((fc) & (BIT(3) | BIT(2))) >> 2)
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#define WLAN_FC_GET_STYPE(fc) \
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(((fc) & (BIT(7) | BIT(6) | BIT(5) | BIT(4))) >> 4)
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#define WLAN_GET_SEQ_FRAG(seq) ((seq) & (BIT(3) | BIT(2) | BIT(1) | BIT(0)))
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#define WLAN_GET_SEQ_SEQ(seq) \
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(((seq) & (~(BIT(3) | BIT(2) | BIT(1) | BIT(0)))) >> 4)
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#define WLAN_FC_TYPE_MGMT 0
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#define WLAN_FC_TYPE_CTRL 1
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#define WLAN_FC_TYPE_DATA 2
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/* management */
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#define WLAN_FC_STYPE_ASSOC_REQ 0
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#define WLAN_FC_STYPE_ASSOC_RESP 1
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#define WLAN_FC_STYPE_REASSOC_REQ 2
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#define WLAN_FC_STYPE_REASSOC_RESP 3
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#define WLAN_FC_STYPE_PROBE_REQ 4
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#define WLAN_FC_STYPE_PROBE_RESP 5
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#define WLAN_FC_STYPE_BEACON 8
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#define WLAN_FC_STYPE_ATIM 9
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#define WLAN_FC_STYPE_DISASSOC 10
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#define WLAN_FC_STYPE_AUTH 11
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#define WLAN_FC_STYPE_DEAUTH 12
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#define WLAN_FC_STYPE_ACTION 13
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/* control */
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#define WLAN_FC_STYPE_PSPOLL 10
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#define WLAN_FC_STYPE_RTS 11
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#define WLAN_FC_STYPE_CTS 12
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#define WLAN_FC_STYPE_ACK 13
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#define WLAN_FC_STYPE_CFEND 14
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#define WLAN_FC_STYPE_CFENDACK 15
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/* data */
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#define WLAN_FC_STYPE_DATA 0
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#define WLAN_FC_STYPE_DATA_CFACK 1
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#define WLAN_FC_STYPE_DATA_CFPOLL 2
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#define WLAN_FC_STYPE_DATA_CFACKPOLL 3
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#define WLAN_FC_STYPE_NULLFUNC 4
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#define WLAN_FC_STYPE_CFACK 5
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#define WLAN_FC_STYPE_CFPOLL 6
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#define WLAN_FC_STYPE_CFACKPOLL 7
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#define WLAN_FC_STYPE_QOS_DATA 8
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/* Authentication algorithms */
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#define WLAN_AUTH_OPEN 0
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#define WLAN_AUTH_SHARED_KEY 1
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#define WLAN_AUTH_CHALLENGE_LEN 128
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#define WLAN_CAPABILITY_ESS BIT(0)
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#define WLAN_CAPABILITY_IBSS BIT(1)
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#define WLAN_CAPABILITY_CF_POLLABLE BIT(2)
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#define WLAN_CAPABILITY_CF_POLL_REQUEST BIT(3)
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#define WLAN_CAPABILITY_PRIVACY BIT(4)
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#define WLAN_CAPABILITY_SHORT_PREAMBLE BIT(5)
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#define WLAN_CAPABILITY_PBCC BIT(6)
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#define WLAN_CAPABILITY_CHANNEL_AGILITY BIT(7)
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#define WLAN_CAPABILITY_SPECTRUM_MGMT BIT(8)
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#define WLAN_CAPABILITY_SHORT_SLOT_TIME BIT(10)
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#define WLAN_CAPABILITY_DSSS_OFDM BIT(13)
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/* Status codes */
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#define WLAN_STATUS_SUCCESS 0
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#define WLAN_STATUS_UNSPECIFIED_FAILURE 1
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#define WLAN_STATUS_CAPS_UNSUPPORTED 10
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#define WLAN_STATUS_REASSOC_NO_ASSOC 11
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#define WLAN_STATUS_ASSOC_DENIED_UNSPEC 12
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#define WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG 13
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#define WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION 14
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#define WLAN_STATUS_CHALLENGE_FAIL 15
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#define WLAN_STATUS_AUTH_TIMEOUT 16
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#define WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA 17
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#define WLAN_STATUS_ASSOC_DENIED_RATES 18
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/* IEEE 802.11b */
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#define WLAN_STATUS_ASSOC_DENIED_NOSHORT 19
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#define WLAN_STATUS_ASSOC_DENIED_NOPBCC 20
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#define WLAN_STATUS_ASSOC_DENIED_NOAGILITY 21
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/* IEEE 802.11h */
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#define WLAN_STATUS_SPEC_MGMT_REQUIRED 22
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#define WLAN_STATUS_PWR_CAPABILITY_NOT_VALID 23
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#define WLAN_STATUS_SUPPORTED_CHANNEL_NOT_VALID 24
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/* IEEE 802.11i */
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#define WLAN_STATUS_INVALID_IE 40
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#define WLAN_STATUS_GROUP_CIPHER_NOT_VALID 41
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#define WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID 42
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#define WLAN_STATUS_AKMP_NOT_VALID 43
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#define WLAN_STATUS_UNSUPPORTED_RSN_IE_VERSION 44
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#define WLAN_STATUS_INVALID_RSN_IE_CAPAB 45
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#define WLAN_STATUS_CIPHER_REJECTED_PER_POLICY 46
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/* Reason codes */
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#define WLAN_REASON_UNSPECIFIED 1
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#define WLAN_REASON_PREV_AUTH_NOT_VALID 2
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#define WLAN_REASON_DEAUTH_LEAVING 3
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#define WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY 4
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#define WLAN_REASON_DISASSOC_AP_BUSY 5
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#define WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA 6
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#define WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA 7
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#define WLAN_REASON_DISASSOC_STA_HAS_LEFT 8
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#define WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH 9
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/* IEEE 802.11i */
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#define WLAN_REASON_INVALID_IE 13
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#define WLAN_REASON_MICHAEL_MIC_FAILURE 14
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#define WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT 15
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#define WLAN_REASON_GROUP_KEY_UPDATE_TIMEOUT 16
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#define WLAN_REASON_IE_IN_4WAY_DIFFERS 17
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#define WLAN_REASON_GROUP_CIPHER_NOT_VALID 18
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#define WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID 19
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#define WLAN_REASON_AKMP_NOT_VALID 20
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#define WLAN_REASON_UNSUPPORTED_RSN_IE_VERSION 21
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#define WLAN_REASON_INVALID_RSN_IE_CAPAB 22
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#define WLAN_REASON_IEEE_802_1X_AUTH_FAILED 23
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#define WLAN_REASON_CIPHER_SUITE_REJECTED 24
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/* Information Element IDs */
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#define WLAN_EID_SSID 0
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#define WLAN_EID_SUPP_RATES 1
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#define WLAN_EID_FH_PARAMS 2
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#define WLAN_EID_DS_PARAMS 3
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#define WLAN_EID_CF_PARAMS 4
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#define WLAN_EID_TIM 5
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#define WLAN_EID_IBSS_PARAMS 6
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#define WLAN_EID_COUNTRY 7
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#define WLAN_EID_CHALLENGE 16
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/* EIDs defined by IEEE 802.11h - START */
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#define WLAN_EID_PWR_CONSTRAINT 32
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#define WLAN_EID_PWR_CAPABILITY 33
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#define WLAN_EID_TPC_REQUEST 34
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#define WLAN_EID_TPC_REPORT 35
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#define WLAN_EID_SUPPORTED_CHANNELS 36
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#define WLAN_EID_CHANNEL_SWITCH 37
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#define WLAN_EID_MEASURE_REQUEST 38
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#define WLAN_EID_MEASURE_REPORT 39
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#define WLAN_EID_QUITE 40
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#define WLAN_EID_IBSS_DFS 41
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/* EIDs defined by IEEE 802.11h - END */
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#define WLAN_EID_ERP_INFO 42
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#define WLAN_EID_RSN 48
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#define WLAN_EID_EXT_SUPP_RATES 50
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#define WLAN_EID_GENERIC 221
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#define WLAN_EID_VENDOR_SPECIFIC 221
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struct ieee80211_mgmt {
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u16 frame_control;
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u16 duration;
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u8 da[6];
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u8 sa[6];
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u8 bssid[6];
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u16 seq_ctrl;
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union {
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struct {
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u16 auth_alg;
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u16 auth_transaction;
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u16 status_code;
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/* possibly followed by Challenge text */
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u8 variable[0];
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} __attribute__ ((packed)) auth;
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struct {
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u16 reason_code;
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} __attribute__ ((packed)) deauth;
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struct {
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u16 capab_info;
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u16 listen_interval;
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/* followed by SSID and Supported rates */
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u8 variable[0];
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} __attribute__ ((packed)) assoc_req;
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struct {
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u16 capab_info;
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u16 status_code;
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u16 aid;
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/* followed by Supported rates */
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u8 variable[0];
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} __attribute__ ((packed)) assoc_resp, reassoc_resp;
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struct {
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u16 capab_info;
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u16 listen_interval;
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u8 current_ap[6];
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/* followed by SSID and Supported rates */
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u8 variable[0];
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} __attribute__ ((packed)) reassoc_req;
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struct {
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u16 reason_code;
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} __attribute__ ((packed)) disassoc;
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struct {
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/* only variable items: SSID, Supported rates */
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u8 variable[0];
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} __attribute__ ((packed)) probe_req;
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struct {
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u8 timestamp[8];
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u16 beacon_int;
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u16 capab_info;
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/* followed by some of SSID, Supported rates,
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* FH Params, DS Params, CF Params, IBSS Params */
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u8 variable[0];
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} __attribute__ ((packed)) probe_resp;
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struct {
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u8 timestamp[8];
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u16 beacon_int;
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u16 capab_info;
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/* followed by some of SSID, Supported rates,
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* FH Params, DS Params, CF Params, IBSS Params, TIM */
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u8 variable[0];
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} __attribute__ ((packed)) beacon;
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struct {
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u8 category;
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union {
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struct {
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u8 action_code;
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u8 dialog_token;
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u8 status_code;
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u8 variable[0];
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} __attribute__ ((packed)) wme_action;
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struct{
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u8 action_code;
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u8 element_id;
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u8 length;
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u8 switch_mode;
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u8 new_chan;
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u8 switch_count;
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} __attribute__ ((packed)) chan_switch;
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} u;
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} __attribute__ ((packed)) action;
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} u;
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} __attribute__ ((packed));
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#define ERP_INFO_NON_ERP_PRESENT BIT(0)
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#define ERP_INFO_USE_PROTECTION BIT(1)
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#define ERP_INFO_BARKER_PREAMBLE_MODE BIT(2)
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/* Parsed Information Elements */
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struct ieee802_11_elems {
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u8 *ssid;
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u8 ssid_len;
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u8 *supp_rates;
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u8 supp_rates_len;
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u8 *fh_params;
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u8 fh_params_len;
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u8 *ds_params;
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u8 ds_params_len;
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u8 *cf_params;
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u8 cf_params_len;
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u8 *tim;
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u8 tim_len;
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u8 *ibss_params;
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u8 ibss_params_len;
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u8 *challenge;
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u8 challenge_len;
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u8 *erp_info;
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u8 erp_info_len;
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u8 *ext_supp_rates;
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u8 ext_supp_rates_len;
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u8 *wpa_ie;
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u8 wpa_ie_len;
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u8 *rsn_ie;
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u8 rsn_ie_len;
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u8 *wme;
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u8 wme_len;
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u8 *wme_tspec;
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u8 wme_tspec_len;
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u8 *power_cap;
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u8 power_cap_len;
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u8 *supp_channels;
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u8 supp_channels_len;
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};
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typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
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struct hostapd_frame_info {
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u32 phytype;
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u32 channel;
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u32 datarate;
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u32 ssi_signal;
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unsigned int passive_scan:1;
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};
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void ieee802_11_send_deauth(struct hostapd_data *hapd, u8 *addr, u16 reason);
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void ieee802_11_mgmt(struct hostapd_data *hapd, u8 *buf, size_t len,
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u16 stype, struct hostapd_frame_info *fi);
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void ieee802_11_mgmt_cb(struct hostapd_data *hapd, u8 *buf, size_t len,
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u16 stype, int ok);
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ParseRes ieee802_11_parse_elems(struct hostapd_data *hapd, u8 *start,
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size_t len,
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struct ieee802_11_elems *elems,
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int show_errors);
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void ieee802_11_print_ssid(const u8 *ssid, u8 len);
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void ieee80211_michael_mic_failure(struct hostapd_data *hapd, const u8 *addr,
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int local);
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int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen);
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int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
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char *buf, size_t buflen);
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u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
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int probe);
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u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid);
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u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid);
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#endif /* IEEE802_11_H */
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