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iwd/src/ie.h
Andrew Zaborowski 9ceca7a521 ie: Parse GTK and IGTK subelements in FTE 
Parse the contents of the GTK and IGTK subelements in an FT IE instead
of working with buffers containing the whole subelement.  Some more
validation of the subelement contents.  Drop support for GTK / IGTK when
building the FTE (unused).
2017-02-01 10:02:14 -06:00

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/*
*
* Wireless daemon for Linux
*
* Copyright (C) 2013-2014 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdbool.h>
#include <stddef.h>
/*
* Information elements, IEEE Std 802.11 ch. 8.4.2
*/
enum ie_type {
IE_TYPE_SSID = 0,
IE_TYPE_SUPPORTED_RATES = 1,
IE_TYPE_FH_PARAMETER_SET = 2,
IE_TYPE_DSSS_PARAMETER_SET = 3,
IE_TYPE_CF_PARAMETER_SET = 4,
IE_TYPE_TIM = 5,
IE_TYPE_IBSS_PARAMETER_SET = 6,
IE_TYPE_COUNTRY = 7,
IE_TYPE_HOPPING_PATTERN_PARAMETERS = 8,
IE_TYPE_HOPPING_PATTERN_TABLE = 9,
IE_TYPE_REQUEST = 10,
IE_TYPE_BSS_LOAD = 11,
IE_TYPE_EDCA_PARAMETER_SET = 12,
IE_TYPE_TSPEC = 13,
IE_TYPE_TCLAS = 14,
IE_TYPE_SCHEDULE = 15,
IE_TYPE_CHALLENGE_TEXT = 16,
/* Reserved 17 - 31 */
IE_TYPE_POWER_CONSTRAINT = 32,
IE_TYPE_POWER_CAPABILITY = 33,
IE_TYPE_TPC_REQUEST = 34,
IE_TYPE_TPC_REPORT = 35,
IE_TYPE_SUPPORTED_CHANNELS = 36,
IE_TYPE_CHANNEL_SWITCH_ANNOUNCEMENT = 37,
IE_TYPE_MEASUREMENT_REQUEST = 38,
IE_TYPE_MEASUREMENT_REPORT = 39,
IE_TYPE_QUIET = 40,
IE_TYPE_IBSS_DFS = 41,
IE_TYPE_ERP = 42,
IE_TYPE_TS_DELAY = 43,
IE_TYPE_TCLAS_PROCESSING = 44,
IE_TYPE_HT_CAPABILITIES = 45,
IE_TYPE_QOS_CAPABILITY = 46,
/* Reserved 47 */
IE_TYPE_RSN = 48,
/* Reserved 49 */
IE_TYPE_EXTENDED_SUPPORTED_RATES = 50,
IE_TYPE_AP_CHANNEL_REPORT = 51,
IE_TYPE_NEIGHBOR_REPORT = 52,
IE_TYPE_RCPI = 53,
IE_TYPE_MOBILITY_DOMAIN = 54,
IE_TYPE_FAST_BSS_TRANSITION = 55,
IE_TYPE_TIMEOUT_INTERVAL = 56,
IE_TYPE_RIC_DATA = 57,
IE_TYPE_DSE_REGISTERED_LOCATION = 58,
IE_TYPE_SUPPORTED_OPERATING_CLASSES = 59,
IE_TYPE_EXTENDED_CHANNEL_SWITCH_ANNOUNCEMENT = 60,
IE_TYPE_HT_OPERATION = 61,
IE_TYPE_SECONDARY_CHANNEL_OFFSET = 62,
IE_TYPE_BSS_AVERAGE_ACCESS_DELAY = 63,
IE_TYPE_ANTENNA = 64,
IE_TYPE_RSNI = 65,
IE_TYPE_MEASUREMENT_PILOT_TRANSMISSION = 66,
IE_TYPE_BSS_AVAILABLE_ADMISSION_CAPACITY = 67,
IE_TYPE_BSS_AC_ACCESS_DELAY = 68,
IE_TYPE_TIME_ADVERTISEMENT = 69,
IE_TYPE_RM_ENABLED_CAPABILITIES = 70,
IE_TYPE_MULTIPLE_BSSID = 71,
IE_TYPE_BSS_COEXISTENCE = 72,
IE_TYPE_BSS_INTOLERANT_CHANNEL_REPORT = 73,
IE_TYPE_OVERLAPPING_BSS_SCAN_PARAMETERS = 74,
IE_TYPE_RIC_DESCRIPTOR = 75,
IE_TYPE_MANAGEMENT_MIC = 76,
IE_TYPE_EVENT_REQUEST = 78,
IE_TYPE_EVENT_REPORT = 79,
IE_TYPE_DIAGNOSTIC_REQUEST = 80,
IE_TYPE_DIAGNOSTIC_REPORT = 81,
IE_TYPE_LOCATION_PARAMETERS = 82,
IE_TYPE_NONTRANSMITTED_BSSID_CAPABILITY = 83,
IE_TYPE_SSID_LIST = 84,
IE_TYPE_MULTIPLE_BSSID_INDEX = 85,
IE_TYPE_FMS_DESCRIPTOR = 86,
IE_TYPE_FMS_REQUEST = 87,
IE_TYPE_FMS_RESPONSE = 88,
IE_TYPE_QOS_TRAFFIC_CAPABILITY = 89,
IE_TYPE_BSS_MAX_IDLE_PERIOD = 90,
IE_TYPE_TFS_REQUEST = 91,
IE_TYPE_TFS_RESPONSE = 92,
IE_TYPE_WNM_SLEEP_MODE = 93,
IE_TYPE_TIM_BROADCAST_REQUEST = 94,
IE_TYPE_TIM_BROADCAST_RESPONSE = 95,
IE_TYPE_COLLOCATED_INTERFERENCE_REPORT = 96,
IE_TYPE_CHANNEL_USAGE = 97,
IE_TYPE_TIME_ZONE = 98,
IE_TYPE_DMS_REQUEST = 99,
IE_TYPE_DMS_RESPONSE = 100,
IE_TYPE_LINK_IDENTIFIER = 101,
IE_TYPE_WAKEUP_SCHEDULE = 102,
IE_TYPE_CHANNEL_SWITCH_TIMING = 104,
IE_TYPE_PTI_CONTROL = 105,
IE_TYPE_TPU_BUFFER_STATUS = 106,
IE_TYPE_INTERWORKING = 107,
IE_TYPE_ADVERTISEMENT_PROTOCOL = 108,
IE_TYPE_EXPEDITED_BANDWIDTH_REQUEST = 109,
IE_TYPE_QOS_MAP_SET = 110,
IE_TYPE_ROAMING_CONSORTIUM = 111,
IE_TYPE_EMERGENCY_ALERT_IDENTIFIER = 112,
IE_TYPE_MESH_CONFIGURATION = 113,
IE_TYPE_MESH_ID = 114,
IE_TYPE_MESH_LINK_METRIC_REPORT = 115,
IE_TYPE_CONGESTION_NOTIFICATION = 116,
IE_TYPE_MESH_PEERING_MANAGEMENT = 117,
IE_TYPE_MESH_CHANNEL_SWITCH_PARAMETERS = 118,
IE_TYPE_MESH_AWAKE_WINDOW = 119,
IE_TYPE_BEACON_TIMING = 120,
IE_TYPE_MCCAOP_SETUP_REQUEST = 121,
IE_TYPE_MCCAOP_SETUP_REPLY = 122,
IE_TYPE_MCCAOP_ADVERTISEMENT = 123,
IE_TYPE_MCCAOP_TEARDOWN = 124,
IE_TYPE_GANN = 125,
IE_TYPE_RANN = 126,
IE_TYPE_EXTENDED_CAPABILITIES = 127,
/* Reserved 128 - 129 */
IE_TYPE_PREQ = 130,
IE_TYPE_PREP = 131,
IE_TYPE_PERR = 132,
/* Reserved 133 - 136 */
IE_TYPE_PXU = 137,
IE_TYPE_PXUC = 138,
IE_TYPE_AUTHENTICATED_MESH_PEERING_EXCHANGE = 139,
IE_TYPE_MIC = 140,
IE_TYPE_DESTINATION_URI = 141,
IE_TYPE_U_APSD_COEXISTENCE = 142,
/* Reserved 143 - 173 */
IE_TYPE_MCCAOP_ADVERTISEMENT_OVERVIEW = 174,
/* Reserved 175 - 220 */
IE_TYPE_VENDOR_SPECIFIC = 221,
/* Reserved 222 - 255 */
};
enum ie_rsn_cipher_suite {
IE_RSN_CIPHER_SUITE_USE_GROUP_CIPHER = 0x0001,
IE_RSN_CIPHER_SUITE_WEP40 = 0x0002,
IE_RSN_CIPHER_SUITE_TKIP = 0x0004,
IE_RSN_CIPHER_SUITE_CCMP = 0x0008,
IE_RSN_CIPHER_SUITE_WEP104 = 0x0010,
IE_RSN_CIPHER_SUITE_BIP = 0x0020,
IE_RSN_CIPHER_SUITE_NO_GROUP_TRAFFIC = 0x0040,
};
enum ie_rsn_akm_suite {
IE_RSN_AKM_SUITE_8021X = 0x0001,
IE_RSN_AKM_SUITE_PSK = 0x0002,
IE_RSN_AKM_SUITE_FT_OVER_8021X = 0x0004,
IE_RSN_AKM_SUITE_FT_USING_PSK = 0x0008,
IE_RSN_AKM_SUITE_8021X_SHA256 = 0x0010,
IE_RSN_AKM_SUITE_PSK_SHA256 = 0x0020,
IE_RSN_AKM_SUITE_TDLS = 0x0040,
IE_RSN_AKM_SUITE_SAE_SHA256 = 0x0080,
IE_RSN_AKM_SUITE_FT_OVER_SAE_SHA256 = 0x0100,
};
struct ie_tlv_iter {
unsigned int max;
unsigned int pos;
const unsigned char *tlv;
unsigned int tag;
unsigned int len;
const unsigned char *data;
};
#define MAX_BUILDER_SIZE (8 * 1024)
struct ie_tlv_builder {
unsigned char buf[MAX_BUILDER_SIZE];
unsigned int max;
unsigned int pos;
unsigned char *tlv;
struct ie_tlv_builder *parent;
unsigned int tag;
unsigned int len;
};
struct ie_rsn_info {
enum ie_rsn_cipher_suite group_cipher;
uint16_t pairwise_ciphers;
uint16_t akm_suites;
bool preauthentication:1;
bool no_pairwise:1;
uint8_t ptksa_replay_counter:2;
uint8_t gtksa_replay_counter:2;
bool mfpr:1;
bool mfpc:1;
bool peerkey_enabled:1;
bool spp_a_msdu_capable:1;
bool spp_a_msdu_required:1;
bool pbac:1;
bool extended_key_id:1;
uint8_t num_pmkids;
const uint8_t *pmkids;
enum ie_rsn_cipher_suite group_management_cipher;
};
/* See chapter 8.4.1.4 for capability details */
enum ie_bss_capability {
IE_BSS_CAP_ESS = 0x0001,
IE_BSS_CAP_IBSS = 0x0002,
IE_BSS_CAP_PRIVACY = 0x0010,
};
struct ie_ft_info {
uint8_t mic_element_count;
uint8_t mic[16];
uint8_t anonce[32];
uint8_t snonce[32];
uint8_t r0khid[48];
size_t r0khid_len;
uint8_t r1khid[6];
bool r1khid_present:1;
uint8_t gtk_key_id;
uint8_t gtk_len;
uint8_t gtk_rsc[8];
uint8_t gtk[40];
uint16_t igtk_key_id;
uint8_t igtk_ipn[6];
uint8_t igtk_len;
uint8_t igtk[24];
};
/* See chapter 8.4.2.47 for radio measurement capability details */
enum ie_rm_capability {
IE_RM_CAP_NEIGHBOR_REPORT = 0x0002,
};
struct ie_neighbor_report_info {
uint8_t addr[6];
uint8_t reachable;
bool spectrum_mgmt : 1;
bool qos : 1;
bool apsd : 1;
bool rm : 1;
bool delayed_block_ack : 1;
bool immediate_block_ack : 1;
bool security : 1;
bool key_scope : 1;
bool md : 1;
bool ht : 1;
uint8_t oper_class;
uint8_t channel_num;
uint8_t phy_type;
uint8_t bss_transition_pref;
bool bss_transition_pref_present : 1;
};
void ie_tlv_iter_init(struct ie_tlv_iter *iter, const unsigned char *tlv,
unsigned int len);
void ie_tlv_iter_recurse(struct ie_tlv_iter *iter,
struct ie_tlv_iter *recurse);
bool ie_tlv_iter_next(struct ie_tlv_iter *iter);
static inline unsigned int ie_tlv_iter_get_tag(struct ie_tlv_iter *iter)
{
return iter->tag;
}
static inline unsigned int ie_tlv_iter_get_length(struct ie_tlv_iter *iter)
{
return iter->len;
}
static inline const unsigned char *ie_tlv_iter_get_data(
struct ie_tlv_iter *iter)
{
return iter->data;
}
void *ie_tlv_extract_wsc_payload(const uint8_t *ies, size_t len,
ssize_t *out_len);
void *ie_tlv_encapsulate_wsc_payload(const uint8_t *data, size_t len,
size_t *out_len);
bool ie_tlv_builder_init(struct ie_tlv_builder *builder);
bool ie_tlv_builder_set_length(struct ie_tlv_builder *builder,
unsigned int new_len);
bool ie_tlv_builder_next(struct ie_tlv_builder *builder, unsigned int new_tag);
unsigned char *ie_tlv_builder_get_data(struct ie_tlv_builder *builder);
bool ie_tlv_builder_recurse(struct ie_tlv_builder *builder,
struct ie_tlv_builder *recurse);
void ie_tlv_builder_finalize(struct ie_tlv_builder *builder,
unsigned int *out_len);
uint32_t ie_rsn_cipher_suite_to_cipher(enum ie_rsn_cipher_suite suite);
int ie_parse_rsne(struct ie_tlv_iter *iter, struct ie_rsn_info *info);
int ie_parse_rsne_from_data(const uint8_t *data, size_t len,
struct ie_rsn_info *info);
bool ie_build_rsne(const struct ie_rsn_info *info, uint8_t *to);
int ie_parse_wpa(struct ie_tlv_iter *iter, struct ie_rsn_info *out_info);
int ie_parse_wpa_from_data(const uint8_t *data, size_t len,
struct ie_rsn_info *info);
bool is_ie_wpa_ie(const uint8_t *data, uint8_t len);
bool ie_build_wpa(const struct ie_rsn_info *info, uint8_t *to);
int ie_parse_bss_load(struct ie_tlv_iter *iter, uint16_t *out_sta_count,
uint8_t *out_channel_utilization,
uint16_t *out_admission_capacity);
int ie_parse_bss_load_from_data(const uint8_t *data, uint8_t len,
uint16_t *out_sta_count,
uint8_t *out_channel_utilization,
uint16_t *out_admission_capacity);
int ie_parse_supported_rates(struct ie_tlv_iter *iter,
struct l_uintset **set);
int ie_parse_supported_rates_from_data(const uint8_t *data, uint8_t len,
struct l_uintset **set);
int ie_parse_mobility_domain(struct ie_tlv_iter *iter, uint16_t *mdid,
bool *ft_over_ds, bool *resource_req);
int ie_parse_mobility_domain_from_data(const uint8_t *data, uint8_t len,
uint16_t *mdid,
bool *ft_over_ds, bool *resource_req);
bool ie_build_mobility_domain(uint16_t mdid, bool ft_over_ds,
bool resource_req, uint8_t *to);
int ie_parse_fast_bss_transition(struct ie_tlv_iter *iter,
struct ie_ft_info *info);
int ie_parse_fast_bss_transition_from_data(const uint8_t *data, uint8_t len,
struct ie_ft_info *info);
bool ie_build_fast_bss_transition(const struct ie_ft_info *info, uint8_t *to);
int ie_parse_neighbor_report(struct ie_tlv_iter *iter,
struct ie_neighbor_report_info *info);
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