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5cc58a9ecf
Currently, wmediumd requires each used MAC address to be configured as a station in the virtual air, but that doesn't make sense as any station could have multiple MAC addresses, and even have randomized ones in scanning, etc. Add some code here to tell wmediumd of used MAC addresses, binding them to the hardware address. Combined with a wmediumd patch that makes it track the addresses this allows configuring just the radio address (42:00:00:00:nn:00 unless the radio was manually created) in wmediumd as a station, and all addresses that the station uses are added/removed dynamically. Tested with random scan, which without this and the corresponding wmediumd change doesn't get anything through as the sender doesn't exist as far as wmediumd is concerned (it's random). Link: https://lore.kernel.org/r/20200323162358.b397b1a1acef.Ice0536e34e5d96c51f97c374ea8af9551347c7e8@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
278 lines
9.9 KiB
C
278 lines
9.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
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* Copyright (c) 2008, Jouni Malinen <j@w1.fi>
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* Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
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* Copyright (C) 2020 Intel Corporation
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*/
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#ifndef __MAC80211_HWSIM_H
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#define __MAC80211_HWSIM_H
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/**
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* enum hwsim_tx_control_flags - flags to describe transmission info/status
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*
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* These flags are used to give the wmediumd extra information in order to
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* modify its behavior for each frame
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*
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* @HWSIM_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame.
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* @HWSIM_TX_CTL_NO_ACK: tell the wmediumd not to wait for an ack
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* @HWSIM_TX_STAT_ACK: Frame was acknowledged
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*
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*/
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enum hwsim_tx_control_flags {
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HWSIM_TX_CTL_REQ_TX_STATUS = BIT(0),
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HWSIM_TX_CTL_NO_ACK = BIT(1),
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HWSIM_TX_STAT_ACK = BIT(2),
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};
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/**
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* DOC: Frame transmission/registration support
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*
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* Frame transmission and registration support exists to allow userspace
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* entities such as wmediumd to receive and process all broadcasted
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* frames from a mac80211_hwsim radio device.
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*
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* This allow user space applications to decide if the frame should be
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* dropped or not and implement a wireless medium simulator at user space.
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*
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* Registration is done by sending a register message to the driver and
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* will be automatically unregistered if the user application doesn't
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* responds to sent frames.
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* Once registered the user application has to take responsibility of
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* broadcasting the frames to all listening mac80211_hwsim radio
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* interfaces.
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*
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* For more technical details, see the corresponding command descriptions
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* below.
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*/
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/**
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* enum hwsim_commands - supported hwsim commands
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*
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* @HWSIM_CMD_UNSPEC: unspecified command to catch errors
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*
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* @HWSIM_CMD_REGISTER: request to register and received all broadcasted
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* frames by any mac80211_hwsim radio device.
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* @HWSIM_CMD_FRAME: send/receive a broadcasted frame from/to kernel/user
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* space, uses:
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* %HWSIM_ATTR_ADDR_TRANSMITTER, %HWSIM_ATTR_ADDR_RECEIVER,
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* %HWSIM_ATTR_FRAME, %HWSIM_ATTR_FLAGS, %HWSIM_ATTR_RX_RATE,
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* %HWSIM_ATTR_SIGNAL, %HWSIM_ATTR_COOKIE, %HWSIM_ATTR_FREQ (optional)
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* @HWSIM_CMD_TX_INFO_FRAME: Transmission info report from user space to
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* kernel, uses:
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* %HWSIM_ATTR_ADDR_TRANSMITTER, %HWSIM_ATTR_FLAGS,
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* %HWSIM_ATTR_TX_INFO, %WSIM_ATTR_TX_INFO_FLAGS,
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* %HWSIM_ATTR_SIGNAL, %HWSIM_ATTR_COOKIE
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* @HWSIM_CMD_NEW_RADIO: create a new radio with the given parameters,
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* returns the radio ID (>= 0) or negative on errors, if successful
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* then multicast the result, uses optional parameter:
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* %HWSIM_ATTR_REG_STRICT_REG, %HWSIM_ATTR_SUPPORT_P2P_DEVICE,
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* %HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE, %HWSIM_ATTR_CHANNELS,
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* %HWSIM_ATTR_NO_VIF, %HWSIM_ATTR_RADIO_NAME, %HWSIM_ATTR_USE_CHANCTX,
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* %HWSIM_ATTR_REG_HINT_ALPHA2, %HWSIM_ATTR_REG_CUSTOM_REG,
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* %HWSIM_ATTR_PERM_ADDR
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* @HWSIM_CMD_DEL_RADIO: destroy a radio, reply is multicasted
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* @HWSIM_CMD_GET_RADIO: fetch information about existing radios, uses:
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* %HWSIM_ATTR_RADIO_ID
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* @HWSIM_CMD_ADD_MAC_ADDR: add a receive MAC address (given in the
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* %HWSIM_ATTR_ADDR_RECEIVER attribute) to a device identified by
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* %HWSIM_ATTR_ADDR_TRANSMITTER. This lets wmediumd forward frames
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* to this receiver address for a given station.
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* @HWSIM_CMD_DEL_MAC_ADDR: remove the MAC address again, the attributes
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* are the same as to @HWSIM_CMD_ADD_MAC_ADDR.
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* @__HWSIM_CMD_MAX: enum limit
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*/
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enum {
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HWSIM_CMD_UNSPEC,
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HWSIM_CMD_REGISTER,
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HWSIM_CMD_FRAME,
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HWSIM_CMD_TX_INFO_FRAME,
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HWSIM_CMD_NEW_RADIO,
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HWSIM_CMD_DEL_RADIO,
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HWSIM_CMD_GET_RADIO,
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HWSIM_CMD_ADD_MAC_ADDR,
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HWSIM_CMD_DEL_MAC_ADDR,
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__HWSIM_CMD_MAX,
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};
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#define HWSIM_CMD_MAX (_HWSIM_CMD_MAX - 1)
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#define HWSIM_CMD_CREATE_RADIO HWSIM_CMD_NEW_RADIO
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#define HWSIM_CMD_DESTROY_RADIO HWSIM_CMD_DEL_RADIO
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/**
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* enum hwsim_attrs - hwsim netlink attributes
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*
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* @HWSIM_ATTR_UNSPEC: unspecified attribute to catch errors
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*
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* @HWSIM_ATTR_ADDR_RECEIVER: MAC address of the radio device that
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* the frame is broadcasted to
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* @HWSIM_ATTR_ADDR_TRANSMITTER: MAC address of the radio device that
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* the frame was broadcasted from
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* @HWSIM_ATTR_FRAME: Data array
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* @HWSIM_ATTR_FLAGS: mac80211 transmission flags, used to process
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properly the frame at user space
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* @HWSIM_ATTR_RX_RATE: estimated rx rate index for this frame at user
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space
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* @HWSIM_ATTR_SIGNAL: estimated RX signal for this frame at user
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space
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* @HWSIM_ATTR_TX_INFO: ieee80211_tx_rate array
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* @HWSIM_ATTR_COOKIE: sk_buff cookie to identify the frame
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* @HWSIM_ATTR_CHANNELS: u32 attribute used with the %HWSIM_CMD_CREATE_RADIO
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* command giving the number of channels supported by the new radio
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* @HWSIM_ATTR_RADIO_ID: u32 attribute used with %HWSIM_CMD_DESTROY_RADIO
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* only to destroy a radio
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* @HWSIM_ATTR_REG_HINT_ALPHA2: alpha2 for regulatoro driver hint
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* (nla string, length 2)
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* @HWSIM_ATTR_REG_CUSTOM_REG: custom regulatory domain index (u32 attribute)
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* @HWSIM_ATTR_REG_STRICT_REG: request REGULATORY_STRICT_REG (flag attribute)
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* @HWSIM_ATTR_SUPPORT_P2P_DEVICE: support P2P Device virtual interface (flag)
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* @HWSIM_ATTR_USE_CHANCTX: used with the %HWSIM_CMD_CREATE_RADIO
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* command to force use of channel contexts even when only a
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* single channel is supported
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* @HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE: used with the %HWSIM_CMD_CREATE_RADIO
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* command to force radio removal when process that created the radio dies
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* @HWSIM_ATTR_RADIO_NAME: Name of radio, e.g. phy666
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* @HWSIM_ATTR_NO_VIF: Do not create vif (wlanX) when creating radio.
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* @HWSIM_ATTR_FREQ: Frequency at which packet is transmitted or received.
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* @HWSIM_ATTR_TX_INFO_FLAGS: additional flags for corresponding
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* rates of %HWSIM_ATTR_TX_INFO
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* @HWSIM_ATTR_PERM_ADDR: permanent mac address of new radio
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* @HWSIM_ATTR_IFTYPE_SUPPORT: u32 attribute of supported interface types bits
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* @HWSIM_ATTR_CIPHER_SUPPORT: u32 array of supported cipher types
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* @__HWSIM_ATTR_MAX: enum limit
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*/
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enum {
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HWSIM_ATTR_UNSPEC,
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HWSIM_ATTR_ADDR_RECEIVER,
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HWSIM_ATTR_ADDR_TRANSMITTER,
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HWSIM_ATTR_FRAME,
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HWSIM_ATTR_FLAGS,
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HWSIM_ATTR_RX_RATE,
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HWSIM_ATTR_SIGNAL,
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HWSIM_ATTR_TX_INFO,
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HWSIM_ATTR_COOKIE,
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HWSIM_ATTR_CHANNELS,
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HWSIM_ATTR_RADIO_ID,
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HWSIM_ATTR_REG_HINT_ALPHA2,
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HWSIM_ATTR_REG_CUSTOM_REG,
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HWSIM_ATTR_REG_STRICT_REG,
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HWSIM_ATTR_SUPPORT_P2P_DEVICE,
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HWSIM_ATTR_USE_CHANCTX,
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HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE,
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HWSIM_ATTR_RADIO_NAME,
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HWSIM_ATTR_NO_VIF,
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HWSIM_ATTR_FREQ,
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HWSIM_ATTR_PAD,
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HWSIM_ATTR_TX_INFO_FLAGS,
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HWSIM_ATTR_PERM_ADDR,
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HWSIM_ATTR_IFTYPE_SUPPORT,
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HWSIM_ATTR_CIPHER_SUPPORT,
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__HWSIM_ATTR_MAX,
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};
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#define HWSIM_ATTR_MAX (__HWSIM_ATTR_MAX - 1)
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/**
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* struct hwsim_tx_rate - rate selection/status
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*
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* @idx: rate index to attempt to send with
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* @count: number of tries in this rate before going to the next rate
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*
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* A value of -1 for @idx indicates an invalid rate and, if used
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* in an array of retry rates, that no more rates should be tried.
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*
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* When used for transmit status reporting, the driver should
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* always report the rate and number of retries used.
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*
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*/
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struct hwsim_tx_rate {
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s8 idx;
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u8 count;
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} __packed;
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/**
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* enum hwsim_tx_rate_flags - per-rate flags set by the rate control algorithm.
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* Inspired by structure mac80211_rate_control_flags. New flags may be
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* appended, but old flags not deleted, to keep compatibility for
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* userspace.
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*
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* These flags are set by the Rate control algorithm for each rate during tx,
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* in the @flags member of struct ieee80211_tx_rate.
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*
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* @MAC80211_HWSIM_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate.
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* @MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required.
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* This is set if the current BSS requires ERP protection.
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* @MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE: Use short preamble.
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* @MAC80211_HWSIM_TX_RC_MCS: HT rate.
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* @MAC80211_HWSIM_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is
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* split into a higher 4 bits (Nss) and lower 4 bits (MCS number)
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* @MAC80211_HWSIM_TX_RC_GREEN_FIELD: Indicates whether this rate should be used
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* in Greenfield mode.
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* @MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be
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* 40 MHz.
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* @MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission
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* @MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission
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* (80+80 isn't supported yet)
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* @MAC80211_HWSIM_TX_RC_DUP_DATA: The frame should be transmitted on both of
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* the adjacent 20 MHz channels, if the current channel type is
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* NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS.
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* @MAC80211_HWSIM_TX_RC_SHORT_GI: Short Guard interval should be used for this
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* rate.
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*/
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enum hwsim_tx_rate_flags {
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MAC80211_HWSIM_TX_RC_USE_RTS_CTS = BIT(0),
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MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT = BIT(1),
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MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE = BIT(2),
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/* rate index is an HT/VHT MCS instead of an index */
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MAC80211_HWSIM_TX_RC_MCS = BIT(3),
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MAC80211_HWSIM_TX_RC_GREEN_FIELD = BIT(4),
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MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH = BIT(5),
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MAC80211_HWSIM_TX_RC_DUP_DATA = BIT(6),
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MAC80211_HWSIM_TX_RC_SHORT_GI = BIT(7),
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MAC80211_HWSIM_TX_RC_VHT_MCS = BIT(8),
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MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH = BIT(9),
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MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH = BIT(10),
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};
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/**
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* struct hwsim_tx_rate - rate selection/status
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*
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* @idx: rate index to attempt to send with
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* @count: number of tries in this rate before going to the next rate
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*
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* A value of -1 for @idx indicates an invalid rate and, if used
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* in an array of retry rates, that no more rates should be tried.
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*
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* When used for transmit status reporting, the driver should
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* always report the rate and number of retries used.
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*
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*/
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struct hwsim_tx_rate_flag {
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s8 idx;
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u16 flags;
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} __packed;
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/**
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* DOC: Frame transmission support over virtio
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*
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* Frame transmission is also supported over virtio to allow communication
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* with external entities.
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*/
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/**
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* enum hwsim_vqs - queues for virtio frame transmission
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*
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* @HWSIM_VQ_TX: send frames to external entity
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* @HWSIM_VQ_RX: receive frames and transmission info reports
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* @HWSIM_NUM_VQS: enum limit
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*/
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enum {
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HWSIM_VQ_TX,
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HWSIM_VQ_RX,
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HWSIM_NUM_VQS,
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};
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#endif /* __MAC80211_HWSIM_H */
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