/*
 * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
 * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
 * Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __MAC80211_HWSIM_H
#define __MAC80211_HWSIM_H

/**
 * enum hwsim_tx_control_flags - flags to describe transmission info/status
 *
 * These flags are used to give the wmediumd extra information in order to
 * modify its behavior for each frame
 *
 * @HWSIM_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame.
 * @HWSIM_TX_CTL_NO_ACK: tell the wmediumd not to wait for an ack
 * @HWSIM_TX_STAT_ACK: Frame was acknowledged
 *
 */
enum hwsim_tx_control_flags {
	HWSIM_TX_CTL_REQ_TX_STATUS		= BIT(0),
	HWSIM_TX_CTL_NO_ACK			= BIT(1),
	HWSIM_TX_STAT_ACK			= BIT(2),
};

/**
 * DOC: Frame transmission/registration support
 *
 * Frame transmission and registration support exists to allow userspace
 * entities such as wmediumd to receive and process all broadcasted
 * frames from a mac80211_hwsim radio device.
 *
 * This allow user space applications to decide if the frame should be
 * dropped or not and implement a wireless medium simulator at user space.
 *
 * Registration is done by sending a register message to the driver and
 * will be automatically unregistered if the user application doesn't
 * responds to sent frames.
 * Once registered the user application has to take responsibility of
 * broadcasting the frames to all listening mac80211_hwsim radio
 * interfaces.
 *
 * For more technical details, see the corresponding command descriptions
 * below.
 */

/**
 * enum hwsim_commands - supported hwsim commands
 *
 * @HWSIM_CMD_UNSPEC: unspecified command to catch errors
 *
 * @HWSIM_CMD_REGISTER: request to register and received all broadcasted
 *	frames by any mac80211_hwsim radio device.
 * @HWSIM_CMD_FRAME: send/receive a broadcasted frame from/to kernel/user
 * space, uses:
 *	%HWSIM_ATTR_ADDR_TRANSMITTER, %HWSIM_ATTR_ADDR_RECEIVER,
 *	%HWSIM_ATTR_FRAME, %HWSIM_ATTR_FLAGS, %HWSIM_ATTR_RX_RATE,
 *	%HWSIM_ATTR_SIGNAL, %HWSIM_ATTR_COOKIE
 * @HWSIM_CMD_TX_INFO_FRAME: Transmission info report from user space to
 * kernel, uses:
 *	%HWSIM_ATTR_ADDR_TRANSMITTER, %HWSIM_ATTR_FLAGS,
 *	%HWSIM_ATTR_TX_INFO, %HWSIM_ATTR_SIGNAL, %HWSIM_ATTR_COOKIE
 * @__HWSIM_CMD_MAX: enum limit
 */
enum {
	HWSIM_CMD_UNSPEC,
	HWSIM_CMD_REGISTER,
	HWSIM_CMD_FRAME,
	HWSIM_CMD_TX_INFO_FRAME,
	__HWSIM_CMD_MAX,
};
#define HWSIM_CMD_MAX (_HWSIM_CMD_MAX - 1)

/**
 * enum hwsim_attrs - hwsim netlink attributes
 *
 * @HWSIM_ATTR_UNSPEC: unspecified attribute to catch errors
 *
 * @HWSIM_ATTR_ADDR_RECEIVER: MAC address of the radio device that
 *	the frame is broadcasted to
 * @HWSIM_ATTR_ADDR_TRANSMITTER: MAC address of the radio device that
 *	the frame was broadcasted from
 * @HWSIM_ATTR_FRAME: Data array
 * @HWSIM_ATTR_FLAGS: mac80211 transmission flags, used to process
	properly the frame at user space
 * @HWSIM_ATTR_RX_RATE: estimated rx rate index for this frame at user
	space
 * @HWSIM_ATTR_SIGNAL: estimated RX signal for this frame at user
	space
 * @HWSIM_ATTR_TX_INFO: ieee80211_tx_rate array
 * @HWSIM_ATTR_COOKIE: sk_buff cookie to identify the frame
 * @__HWSIM_ATTR_MAX: enum limit
 */


enum {
	HWSIM_ATTR_UNSPEC,
	HWSIM_ATTR_ADDR_RECEIVER,
	HWSIM_ATTR_ADDR_TRANSMITTER,
	HWSIM_ATTR_FRAME,
	HWSIM_ATTR_FLAGS,
	HWSIM_ATTR_RX_RATE,
	HWSIM_ATTR_SIGNAL,
	HWSIM_ATTR_TX_INFO,
	HWSIM_ATTR_COOKIE,
	__HWSIM_ATTR_MAX,
};
#define HWSIM_ATTR_MAX (__HWSIM_ATTR_MAX - 1)

/**
 * struct hwsim_tx_rate - rate selection/status
 *
 * @idx: rate index to attempt to send with
 * @count: number of tries in this rate before going to the next rate
 *
 * A value of -1 for @idx indicates an invalid rate and, if used
 * in an array of retry rates, that no more rates should be tried.
 *
 * When used for transmit status reporting, the driver should
 * always report the rate and number of retries used.
 *
 */
struct hwsim_tx_rate {
	s8 idx;
	u8 count;
} __packed;

#endif /* __MAC80211_HWSIM_H */