844580ff63
There is a bug where a device with index 6 would write out of bounds in the array of paired devices. This patch fixes that problem. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com> Reviewed-by: Olivier Gay <ogay@logitech.com> Signed-off-by: Nestor Lopez Casado <nlopezcasad@logitech.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
#ifndef __HID_LOGITECH_DJ_H
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#define __HID_LOGITECH_DJ_H
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/*
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* HID driver for Logitech Unifying receivers
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*
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* Copyright (c) 2011 Logitech
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/kfifo.h>
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#define DJ_MAX_PAIRED_DEVICES 6
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#define DJ_MAX_NUMBER_NOTIFICATIONS 8
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#define DJ_DEVICE_INDEX_MIN 1
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#define DJ_DEVICE_INDEX_MAX 6
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#define DJREPORT_SHORT_LENGTH 15
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#define DJREPORT_LONG_LENGTH 32
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#define REPORT_ID_DJ_SHORT 0x20
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#define REPORT_ID_DJ_LONG 0x21
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#define REPORT_TYPE_RFREPORT_FIRST 0x01
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#define REPORT_TYPE_RFREPORT_LAST 0x1F
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/* Command Switch to DJ mode */
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#define REPORT_TYPE_CMD_SWITCH 0x80
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#define CMD_SWITCH_PARAM_DEVBITFIELD 0x00
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#define CMD_SWITCH_PARAM_TIMEOUT_SECONDS 0x01
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#define TIMEOUT_NO_KEEPALIVE 0x00
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/* Command to Get the list of Paired devices */
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#define REPORT_TYPE_CMD_GET_PAIRED_DEVICES 0x81
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/* Device Paired Notification */
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#define REPORT_TYPE_NOTIF_DEVICE_PAIRED 0x41
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#define SPFUNCTION_MORE_NOTIF_EXPECTED 0x01
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#define SPFUNCTION_DEVICE_LIST_EMPTY 0x02
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#define DEVICE_PAIRED_PARAM_SPFUNCTION 0x00
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#define DEVICE_PAIRED_PARAM_EQUAD_ID_LSB 0x01
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#define DEVICE_PAIRED_PARAM_EQUAD_ID_MSB 0x02
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#define DEVICE_PAIRED_RF_REPORT_TYPE 0x03
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/* Device Un-Paired Notification */
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#define REPORT_TYPE_NOTIF_DEVICE_UNPAIRED 0x40
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/* Connection Status Notification */
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#define REPORT_TYPE_NOTIF_CONNECTION_STATUS 0x42
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#define CONNECTION_STATUS_PARAM_STATUS 0x00
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#define STATUS_LINKLOSS 0x01
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/* Error Notification */
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#define REPORT_TYPE_NOTIF_ERROR 0x7F
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#define NOTIF_ERROR_PARAM_ETYPE 0x00
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#define ETYPE_KEEPALIVE_TIMEOUT 0x01
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/* supported DJ HID && RF report types */
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#define REPORT_TYPE_KEYBOARD 0x01
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#define REPORT_TYPE_MOUSE 0x02
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#define REPORT_TYPE_CONSUMER_CONTROL 0x03
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#define REPORT_TYPE_SYSTEM_CONTROL 0x04
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#define REPORT_TYPE_MEDIA_CENTER 0x08
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#define REPORT_TYPE_LEDS 0x0E
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/* RF Report types bitfield */
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#define STD_KEYBOARD 0x00000002
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#define STD_MOUSE 0x00000004
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#define MULTIMEDIA 0x00000008
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#define POWER_KEYS 0x00000010
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#define MEDIA_CENTER 0x00000100
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#define KBD_LEDS 0x00004000
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struct dj_report {
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u8 report_id;
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u8 device_index;
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u8 report_type;
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u8 report_params[DJREPORT_SHORT_LENGTH - 3];
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};
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struct dj_receiver_dev {
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struct hid_device *hdev;
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struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES +
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DJ_DEVICE_INDEX_MIN];
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struct work_struct work;
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struct kfifo notif_fifo;
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spinlock_t lock;
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};
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struct dj_device {
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struct hid_device *hdev;
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struct dj_receiver_dev *dj_receiver_dev;
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u32 reports_supported;
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u8 device_index;
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};
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/**
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* is_dj_device - know if the given dj_device is not the receiver.
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* @dj_dev: the dj device to test
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*
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* This macro tests if a struct dj_device pointer is a device created
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* by the bus enumarator.
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*/
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#define is_dj_device(dj_dev) \
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(&(dj_dev)->dj_receiver_dev->hdev->dev == (dj_dev)->hdev->dev.parent)
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#endif
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