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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* IEEE 802.11 mesh definitions
*
* Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
* <jkmaline@cc.hut.fi>
* Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
* Copyright (c) 2005, Devicescape Software, Inc.
* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
* Copyright (c) 2013 - 2014 Intel Mobile Communications GmbH
* Copyright (c) 2016 - 2017 Intel Deutschland GmbH
* Copyright (c) 2018 - 2025 Intel Corporation
*/
#ifndef LINUX_IEEE80211_MESH_H
#define LINUX_IEEE80211_MESH_H
#include <linux/types.h>
#include <linux/if_ether.h>
#define IEEE80211_MAX_MESH_ID_LEN 32
struct ieee80211s_hdr {
u8 flags;
u8 ttl;
__le32 seqnum;
u8 eaddr1[ETH_ALEN];
u8 eaddr2[ETH_ALEN];
} __packed __aligned(2);
/* Mesh flags */
#define MESH_FLAGS_AE_A4 0x1
#define MESH_FLAGS_AE_A5_A6 0x2
#define MESH_FLAGS_AE 0x3
#define MESH_FLAGS_PS_DEEP 0x4
/**
* enum ieee80211_preq_flags - mesh PREQ element flags
*
* @IEEE80211_PREQ_PROACTIVE_PREP_FLAG: proactive PREP subfield
*/
enum ieee80211_preq_flags {
IEEE80211_PREQ_PROACTIVE_PREP_FLAG = 1<<2,
};
/**
* enum ieee80211_preq_target_flags - mesh PREQ element per target flags
*
* @IEEE80211_PREQ_TO_FLAG: target only subfield
* @IEEE80211_PREQ_USN_FLAG: unknown target HWMP sequence number subfield
*/
enum ieee80211_preq_target_flags {
IEEE80211_PREQ_TO_FLAG = 1<<0,
IEEE80211_PREQ_USN_FLAG = 1<<2,
};
/**
* struct ieee80211_mesh_chansw_params_ie - mesh channel switch parameters IE
* @mesh_ttl: Time To Live
* @mesh_flags: Flags
* @mesh_reason: Reason Code
* @mesh_pre_value: Precedence Value
*
* This structure represents the payload of the "Mesh Channel Switch
* Parameters element" as described in IEEE Std 802.11-2020 section
* 9.4.2.102.
*/
struct ieee80211_mesh_chansw_params_ie {
u8 mesh_ttl;
u8 mesh_flags;
__le16 mesh_reason;
__le16 mesh_pre_value;
} __packed;
/**
* struct ieee80211_meshconf_ie - Mesh Configuration element
* @meshconf_psel: Active Path Selection Protocol Identifier
* @meshconf_pmetric: Active Path Selection Metric Identifier
* @meshconf_congest: Congestion Control Mode Identifier
* @meshconf_synch: Synchronization Method Identifier
* @meshconf_auth: Authentication Protocol Identifier
* @meshconf_form: Mesh Formation Info
* @meshconf_cap: Mesh Capability (see &enum mesh_config_capab_flags)
*
* This structure represents the payload of the "Mesh Configuration
* element" as described in IEEE Std 802.11-2020 section 9.4.2.97.
*/
struct ieee80211_meshconf_ie {
u8 meshconf_psel;
u8 meshconf_pmetric;
u8 meshconf_congest;
u8 meshconf_synch;
u8 meshconf_auth;
u8 meshconf_form;
u8 meshconf_cap;
} __packed;
/**
* enum mesh_config_capab_flags - Mesh Configuration IE capability field flags
*
* @IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS: STA is willing to establish
* additional mesh peerings with other mesh STAs
* @IEEE80211_MESHCONF_CAPAB_FORWARDING: the STA forwards MSDUs
* @IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING: TBTT adjustment procedure
* is ongoing
* @IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL: STA is in deep sleep mode or has
* neighbors in deep sleep mode
*
* Enumerates the "Mesh Capability" as described in IEEE Std
* 802.11-2020 section 9.4.2.97.7.
*/
enum mesh_config_capab_flags {
IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS = 0x01,
IEEE80211_MESHCONF_CAPAB_FORWARDING = 0x08,
IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING = 0x20,
IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL = 0x40,
};
#define IEEE80211_MESHCONF_FORM_CONNECTED_TO_GATE 0x1
/*
* mesh channel switch parameters element's flag indicator
*
*/
#define WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT BIT(0)
#define WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR BIT(1)
#define WLAN_EID_CHAN_SWITCH_PARAM_REASON BIT(2)
/**
* struct ieee80211_rann_ie - RANN (root announcement) element
* @rann_flags: Flags
* @rann_hopcount: Hop Count
* @rann_ttl: Element TTL
* @rann_addr: Root Mesh STA Address
* @rann_seq: HWMP Sequence Number
* @rann_interval: Interval
* @rann_metric: Metric
*
* This structure represents the payload of the "RANN element" as
* described in IEEE Std 802.11-2020 section 9.4.2.111.
*/
struct ieee80211_rann_ie {
u8 rann_flags;
u8 rann_hopcount;
u8 rann_ttl;
u8 rann_addr[ETH_ALEN];
__le32 rann_seq;
__le32 rann_interval;
__le32 rann_metric;
} __packed;
enum ieee80211_rann_flags {
RANN_FLAG_IS_GATE = 1 << 0,
};
/* Mesh action codes */
enum ieee80211_mesh_actioncode {
WLAN_MESH_ACTION_LINK_METRIC_REPORT,
WLAN_MESH_ACTION_HWMP_PATH_SELECTION,
WLAN_MESH_ACTION_GATE_ANNOUNCEMENT,
WLAN_MESH_ACTION_CONGESTION_CONTROL_NOTIFICATION,
WLAN_MESH_ACTION_MCCA_SETUP_REQUEST,
WLAN_MESH_ACTION_MCCA_SETUP_REPLY,
WLAN_MESH_ACTION_MCCA_ADVERTISEMENT_REQUEST,
WLAN_MESH_ACTION_MCCA_ADVERTISEMENT,
WLAN_MESH_ACTION_MCCA_TEARDOWN,
WLAN_MESH_ACTION_TBTT_ADJUSTMENT_REQUEST,
WLAN_MESH_ACTION_TBTT_ADJUSTMENT_RESPONSE,
};
/**
* enum ieee80211_mesh_sync_method - mesh synchronization method identifier
*
* @IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET: the default synchronization method
* @IEEE80211_SYNC_METHOD_VENDOR: a vendor specific synchronization method
* that will be specified in a vendor specific information element
*/
enum ieee80211_mesh_sync_method {
IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET = 1,
IEEE80211_SYNC_METHOD_VENDOR = 255,
};
/**
* enum ieee80211_mesh_path_protocol - mesh path selection protocol identifier
*
* @IEEE80211_PATH_PROTOCOL_HWMP: the default path selection protocol
* @IEEE80211_PATH_PROTOCOL_VENDOR: a vendor specific protocol that will
* be specified in a vendor specific information element
*/
enum ieee80211_mesh_path_protocol {
IEEE80211_PATH_PROTOCOL_HWMP = 1,
IEEE80211_PATH_PROTOCOL_VENDOR = 255,
};
/**
* enum ieee80211_mesh_path_metric - mesh path selection metric identifier
*
* @IEEE80211_PATH_METRIC_AIRTIME: the default path selection metric
* @IEEE80211_PATH_METRIC_VENDOR: a vendor specific metric that will be
* specified in a vendor specific information element
*/
enum ieee80211_mesh_path_metric {
IEEE80211_PATH_METRIC_AIRTIME = 1,
IEEE80211_PATH_METRIC_VENDOR = 255,
};
/**
* enum ieee80211_root_mode_identifier - root mesh STA mode identifier
*
* These attribute are used by dot11MeshHWMPRootMode to set root mesh STA mode
*
* @IEEE80211_ROOTMODE_NO_ROOT: the mesh STA is not a root mesh STA (default)
* @IEEE80211_ROOTMODE_ROOT: the mesh STA is a root mesh STA if greater than
* this value
* @IEEE80211_PROACTIVE_PREQ_NO_PREP: the mesh STA is a root mesh STA supports
* the proactive PREQ with proactive PREP subfield set to 0
* @IEEE80211_PROACTIVE_PREQ_WITH_PREP: the mesh STA is a root mesh STA
* supports the proactive PREQ with proactive PREP subfield set to 1
* @IEEE80211_PROACTIVE_RANN: the mesh STA is a root mesh STA supports
* the proactive RANN
*/
enum ieee80211_root_mode_identifier {
IEEE80211_ROOTMODE_NO_ROOT = 0,
IEEE80211_ROOTMODE_ROOT = 1,
IEEE80211_PROACTIVE_PREQ_NO_PREP = 2,
IEEE80211_PROACTIVE_PREQ_WITH_PREP = 3,
IEEE80211_PROACTIVE_RANN = 4,
};
#endif /* LINUX_IEEE80211_MESH_H */
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