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38cb87ee47
Make wmm_rule be part of the reg_rule structure. This simplifies the
code a lot at the cost of having bigger memory usage. However in most
cases we have only few reg_rule's and when we do have many like in
iwlwifi we do not save memory as it allocates a separate wmm_rule for
each channel anyway.
This also fixes a bug reported in various places where somewhere the
pointers were corrupted and we ended up doing a null-dereference.
Fixes: 230ebaa189 ("cfg80211: read wmm rules from regulatory database")
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
[rephrase commit message slightly]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
256 lines
11 KiB
C
256 lines
11 KiB
C
#ifndef __NET_REGULATORY_H
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#define __NET_REGULATORY_H
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/*
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* regulatory support structures
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*
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* Copyright 2008-2009 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
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* Copyright (C) 2018 Intel Corporation
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/rcupdate.h>
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/**
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* enum environment_cap - Environment parsed from country IE
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* @ENVIRON_ANY: indicates country IE applies to both indoor and
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* outdoor operation.
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* @ENVIRON_INDOOR: indicates country IE applies only to indoor operation
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* @ENVIRON_OUTDOOR: indicates country IE applies only to outdoor operation
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*/
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enum environment_cap {
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ENVIRON_ANY,
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ENVIRON_INDOOR,
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ENVIRON_OUTDOOR,
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};
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/**
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* struct regulatory_request - used to keep track of regulatory requests
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*
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* @rcu_head: RCU head struct used to free the request
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* @wiphy_idx: this is set if this request's initiator is
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* %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This
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* can be used by the wireless core to deal with conflicts
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* and potentially inform users of which devices specifically
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* cased the conflicts.
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* @initiator: indicates who sent this request, could be any of
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* of those set in nl80211_reg_initiator (%NL80211_REGDOM_SET_BY_*)
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* @alpha2: the ISO / IEC 3166 alpha2 country code of the requested
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* regulatory domain. We have a few special codes:
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* 00 - World regulatory domain
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* 99 - built by driver but a specific alpha2 cannot be determined
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* 98 - result of an intersection between two regulatory domains
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* 97 - regulatory domain has not yet been configured
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* @dfs_region: If CRDA responded with a regulatory domain that requires
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* DFS master operation on a known DFS region (NL80211_DFS_*),
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* dfs_region represents that region. Drivers can use this and the
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* @alpha2 to adjust their device's DFS parameters as required.
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* @user_reg_hint_type: if the @initiator was of type
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* %NL80211_REGDOM_SET_BY_USER, this classifies the type
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* of hint passed. This could be any of the %NL80211_USER_REG_HINT_*
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* types.
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* @intersect: indicates whether the wireless core should intersect
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* the requested regulatory domain with the presently set regulatory
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* domain.
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* @processed: indicates whether or not this requests has already been
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* processed. When the last request is processed it means that the
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* currently regulatory domain set on cfg80211 is updated from
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* CRDA and can be used by other regulatory requests. When a
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* the last request is not yet processed we must yield until it
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* is processed before processing any new requests.
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* @country_ie_checksum: checksum of the last processed and accepted
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* country IE
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* @country_ie_env: lets us know if the AP is telling us we are outdoor,
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* indoor, or if it doesn't matter
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* @list: used to insert into the reg_requests_list linked list
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*/
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struct regulatory_request {
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struct rcu_head rcu_head;
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int wiphy_idx;
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enum nl80211_reg_initiator initiator;
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enum nl80211_user_reg_hint_type user_reg_hint_type;
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char alpha2[3];
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enum nl80211_dfs_regions dfs_region;
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bool intersect;
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bool processed;
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enum environment_cap country_ie_env;
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struct list_head list;
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};
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/**
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* enum ieee80211_regulatory_flags - device regulatory flags
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*
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* @REGULATORY_CUSTOM_REG: tells us the driver for this device
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* has its own custom regulatory domain and cannot identify the
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* ISO / IEC 3166 alpha2 it belongs to. When this is enabled
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* we will disregard the first regulatory hint (when the
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* initiator is %REGDOM_SET_BY_CORE). Drivers that use
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* wiphy_apply_custom_regulatory() should have this flag set
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* or the regulatory core will set it for the wiphy.
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* If you use regulatory_hint() *after* using
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* wiphy_apply_custom_regulatory() the wireless core will
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* clear the REGULATORY_CUSTOM_REG for your wiphy as it would be
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* implied that the device somehow gained knowledge of its region.
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* @REGULATORY_STRICT_REG: tells us that the wiphy for this device
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* has regulatory domain that it wishes to be considered as the
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* superset for regulatory rules. After this device gets its regulatory
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* domain programmed further regulatory hints shall only be considered
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* for this device to enhance regulatory compliance, forcing the
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* device to only possibly use subsets of the original regulatory
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* rules. For example if channel 13 and 14 are disabled by this
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* device's regulatory domain no user specified regulatory hint which
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* has these channels enabled would enable them for this wiphy,
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* the device's original regulatory domain will be trusted as the
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* base. You can program the superset of regulatory rules for this
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* wiphy with regulatory_hint() for cards programmed with an
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* ISO3166-alpha2 country code. wiphys that use regulatory_hint()
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* will have their wiphy->regd programmed once the regulatory
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* domain is set, and all other regulatory hints will be ignored
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* until their own regulatory domain gets programmed.
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* @REGULATORY_DISABLE_BEACON_HINTS: enable this if your driver needs to
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* ensure that passive scan flags and beaconing flags may not be lifted by
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* cfg80211 due to regulatory beacon hints. For more information on beacon
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* hints read the documenation for regulatory_hint_found_beacon()
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* @REGULATORY_COUNTRY_IE_FOLLOW_POWER: for devices that have a preference
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* that even though they may have programmed their own custom power
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* setting prior to wiphy registration, they want to ensure their channel
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* power settings are updated for this connection with the power settings
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* derived from the regulatory domain. The regulatory domain used will be
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* based on the ISO3166-alpha2 from country IE provided through
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* regulatory_hint_country_ie()
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* @REGULATORY_COUNTRY_IE_IGNORE: for devices that have a preference to ignore
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* all country IE information processed by the regulatory core. This will
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* override %REGULATORY_COUNTRY_IE_FOLLOW_POWER as all country IEs will
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* be ignored.
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* @REGULATORY_ENABLE_RELAX_NO_IR: for devices that wish to allow the
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* NO_IR relaxation, which enables transmissions on channels on which
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* otherwise initiating radiation is not allowed. This will enable the
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* relaxations enabled under the CFG80211_REG_RELAX_NO_IR configuration
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* option
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* @REGULATORY_IGNORE_STALE_KICKOFF: the regulatory core will _not_ make sure
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* all interfaces on this wiphy reside on allowed channels. If this flag
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* is not set, upon a regdomain change, the interfaces are given a grace
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* period (currently 60 seconds) to disconnect or move to an allowed
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* channel. Interfaces on forbidden channels are forcibly disconnected.
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* Currently these types of interfaces are supported for enforcement:
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* NL80211_IFTYPE_ADHOC, NL80211_IFTYPE_STATION, NL80211_IFTYPE_AP,
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* NL80211_IFTYPE_AP_VLAN, NL80211_IFTYPE_MONITOR,
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* NL80211_IFTYPE_P2P_CLIENT, NL80211_IFTYPE_P2P_GO,
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* NL80211_IFTYPE_P2P_DEVICE. The flag will be set by default if a device
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* includes any modes unsupported for enforcement checking.
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* @REGULATORY_WIPHY_SELF_MANAGED: for devices that employ wiphy-specific
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* regdom management. These devices will ignore all regdom changes not
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* originating from their own wiphy.
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* A self-managed wiphys only employs regulatory information obtained from
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* the FW and driver and does not use other cfg80211 sources like
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* beacon-hints, country-code IEs and hints from other devices on the same
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* system. Conversely, a self-managed wiphy does not share its regulatory
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* hints with other devices in the system. If a system contains several
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* devices, one or more of which are self-managed, there might be
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* contradictory regulatory settings between them. Usage of flag is
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* generally discouraged. Only use it if the FW/driver is incompatible
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* with non-locally originated hints.
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* This flag is incompatible with the flags: %REGULATORY_CUSTOM_REG,
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* %REGULATORY_STRICT_REG, %REGULATORY_COUNTRY_IE_FOLLOW_POWER,
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* %REGULATORY_COUNTRY_IE_IGNORE and %REGULATORY_DISABLE_BEACON_HINTS.
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* Mixing any of the above flags with this flag will result in a failure
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* to register the wiphy. This flag implies
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* %REGULATORY_DISABLE_BEACON_HINTS and %REGULATORY_COUNTRY_IE_IGNORE.
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*/
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enum ieee80211_regulatory_flags {
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REGULATORY_CUSTOM_REG = BIT(0),
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REGULATORY_STRICT_REG = BIT(1),
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REGULATORY_DISABLE_BEACON_HINTS = BIT(2),
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REGULATORY_COUNTRY_IE_FOLLOW_POWER = BIT(3),
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REGULATORY_COUNTRY_IE_IGNORE = BIT(4),
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REGULATORY_ENABLE_RELAX_NO_IR = BIT(5),
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REGULATORY_IGNORE_STALE_KICKOFF = BIT(6),
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REGULATORY_WIPHY_SELF_MANAGED = BIT(7),
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};
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struct ieee80211_freq_range {
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u32 start_freq_khz;
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u32 end_freq_khz;
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u32 max_bandwidth_khz;
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};
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struct ieee80211_power_rule {
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u32 max_antenna_gain;
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u32 max_eirp;
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};
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/**
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* struct ieee80211_wmm_ac - used to store per ac wmm regulatory limitation
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*
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* The information provided in this structure is required for QoS
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* transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
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*
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* @cw_min: minimum contention window [a value of the form
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* 2^n-1 in the range 1..32767]
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* @cw_max: maximum contention window [like @cw_min]
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* @cot: maximum burst time in units of 32 usecs, 0 meaning disabled
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* @aifsn: arbitration interframe space [0..255]
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*
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*/
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struct ieee80211_wmm_ac {
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u16 cw_min;
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u16 cw_max;
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u16 cot;
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u8 aifsn;
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};
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struct ieee80211_wmm_rule {
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struct ieee80211_wmm_ac client[IEEE80211_NUM_ACS];
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struct ieee80211_wmm_ac ap[IEEE80211_NUM_ACS];
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};
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struct ieee80211_reg_rule {
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struct ieee80211_freq_range freq_range;
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struct ieee80211_power_rule power_rule;
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struct ieee80211_wmm_rule wmm_rule;
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u32 flags;
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u32 dfs_cac_ms;
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bool has_wmm;
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};
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struct ieee80211_regdomain {
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struct rcu_head rcu_head;
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u32 n_reg_rules;
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char alpha2[3];
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enum nl80211_dfs_regions dfs_region;
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struct ieee80211_reg_rule reg_rules[];
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};
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#define MHZ_TO_KHZ(freq) ((freq) * 1000)
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#define KHZ_TO_MHZ(freq) ((freq) / 1000)
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#define DBI_TO_MBI(gain) ((gain) * 100)
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#define MBI_TO_DBI(gain) ((gain) / 100)
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#define DBM_TO_MBM(gain) ((gain) * 100)
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#define MBM_TO_DBM(gain) ((gain) / 100)
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#define REG_RULE_EXT(start, end, bw, gain, eirp, dfs_cac, reg_flags) \
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{ \
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.freq_range.start_freq_khz = MHZ_TO_KHZ(start), \
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.freq_range.end_freq_khz = MHZ_TO_KHZ(end), \
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.freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw), \
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.power_rule.max_antenna_gain = DBI_TO_MBI(gain), \
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.power_rule.max_eirp = DBM_TO_MBM(eirp), \
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.flags = reg_flags, \
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.dfs_cac_ms = dfs_cac, \
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}
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#define REG_RULE(start, end, bw, gain, eirp, reg_flags) \
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REG_RULE_EXT(start, end, bw, gain, eirp, 0, reg_flags)
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#endif
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