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// Copyright © 2006-2010 Travis Robinson. All rights reserved.
//
// website: http://sourceforge.net/projects/libusbdotnet
// e-mail: libusbdotnet@gmail.com
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. or
// visit www.gnu.org.
//
//
using System;
using System.IO;
using System.Text.RegularExpressions;
using LibUsbDotNet.Descriptors;
namespace LibUsbDotNet.DeviceNotify.Linux
{
public partial class LinuxDeviceNotifier
{
private static Regex _RegParseDeviceInterface;
private static string DeviceIntefaceMatchExpression = "usbdev(?<BusNumber>[0-9]+)\\.(?<DeviceAddress>[0-9]+)$";
private readonly string mDevDir;
private FileSystemWatcher mUsbFS;
private static Regex RegParseDeviceInterface
{
get
{
if (ReferenceEquals(_RegParseDeviceInterface, null))
{
_RegParseDeviceInterface = new Regex(DeviceIntefaceMatchExpression,
RegexOptions.Compiled | RegexOptions.ExplicitCapture | RegexOptions.CultureInvariant |
RegexOptions.Singleline);
}
return _RegParseDeviceInterface;
}
}
private static bool IsDeviceEnterface(string name, out byte busNumber, out byte deviceAddress)
{
busNumber = 0;
deviceAddress = 0;
Match match = RegParseDeviceInterface.Match(name);
if (match.Success)
{
try
{
busNumber = byte.Parse(match.Groups["BusNumber"].Value);
deviceAddress = byte.Parse(match.Groups["DeviceAddress"].Value);
return true;
}
catch
{
return false;
}
}
return false;
}
private static bool ReadFileDescriptor(string fullPath, out byte[] deviceDescriptorBytes)
{
try
{
FileStream f = File.Open(fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
deviceDescriptorBytes = new byte[UsbDeviceDescriptor.Size];
int iRead = f.Read(deviceDescriptorBytes, 0, UsbDeviceDescriptor.Size);
f.Close();
return iRead == UsbDeviceDescriptor.Size;
}
catch
{
deviceDescriptorBytes = null;
return false;
}
}
private void StartDevDirectoryMonitor()
{
if (!ReferenceEquals(mUsbFS, null)) return;
BuildDevList();
mUsbFS = new FileSystemWatcher(mDevDir);
mUsbFS.IncludeSubdirectories = false;
mUsbFS.Created += FileAdded;
mUsbFS.Deleted += FileRemoved;
mUsbFS.EnableRaisingEvents = true;
}
private void BuildDevList()
{
mLinuxDevItemList.Clear();
string[] deviceInterfaceFiles = Directory.GetFiles(mDevDir, "usbdev*", SearchOption.TopDirectoryOnly);
foreach (string deviceInterfaceFile in deviceInterfaceFiles)
{
byte busNumber;
byte deviceAddress;
string deviceFileName = Path.GetFileName(deviceInterfaceFile);
if (IsDeviceEnterface(deviceFileName, out busNumber, out deviceAddress))
{
byte[] descriptorBytes;
if (ReadFileDescriptor(deviceInterfaceFile, out descriptorBytes))
{
LinuxDevItem addedItem = new LinuxDevItem(deviceFileName, busNumber, deviceAddress, descriptorBytes);
mLinuxDevItemList.Add(addedItem);
}
}
}
//Console.WriteLine("LinuxDeviceNotifier:BuildDevList Count:{0}",mLinuxDevItemList.Count);
}
private void FileRemoved(object sender, FileSystemEventArgs e)
{
byte busNumber;
byte deviceAddress;
if (IsDeviceEnterface(e.Name, out busNumber, out deviceAddress))
{
LinuxDevItem foundLinuxDevItem;
if ((foundLinuxDevItem = mLinuxDevItemList.FindByName(e.Name)) == null) throw new Exception("FileRemoved:Invalid LinuxDevItem");
//Console.WriteLine("Removed Vid:{0:X4} Pid:{1:X4}", foundLinuxDevItem.DeviceDescriptor.VendorID, foundLinuxDevItem.DeviceDescriptor.ProductID);
//////////////////////
// TODO:DEVICE REMOVAL
//////////////////////
mLinuxDevItemList.Remove(foundLinuxDevItem);
EventHandler<DeviceNotifyEventArgs> deviceNotify = OnDeviceNotify;
if (!ReferenceEquals(deviceNotify, null))
{
deviceNotify(this, new LinuxDeviceNotifyEventArgs(foundLinuxDevItem, DeviceType.DeviceInterface, EventType.DeviceRemoveComplete));
}
}
}
private void FileAdded(object sender, FileSystemEventArgs e)
{
byte busNumber;
byte deviceAddress;
if (IsDeviceEnterface(e.Name, out busNumber, out deviceAddress))
{
byte[] descriptorBytes;
if (ReadFileDescriptor(e.FullPath, out descriptorBytes))
{
LinuxDevItem addedItem = new LinuxDevItem(e.Name, busNumber, deviceAddress, descriptorBytes);
if (mLinuxDevItemList.FindByName(e.Name) != null) throw new Exception("FileAdded:Invalid LinuxDevItem");
mLinuxDevItemList.Add(addedItem);
//Console.WriteLine("Added Vid:{0:X4} Pid:{1:X4}", addedItem.DeviceDescriptor.VendorID, addedItem.DeviceDescriptor.ProductID);
//////////////////////
// TODO:DEVICE ARRIVAL
//////////////////////
EventHandler<DeviceNotifyEventArgs> deviceNotify = OnDeviceNotify;
if (!ReferenceEquals(deviceNotify, null))
{
deviceNotify(this, new LinuxDeviceNotifyEventArgs(addedItem, DeviceType.DeviceInterface, EventType.DeviceArrival));
}
}
}
}
private void StopDevDirectoryMonitor()
{
if (!ReferenceEquals(mUsbFS, null))
{
mUsbFS.EnableRaisingEvents = false;
mUsbFS.Created -= FileAdded;
mUsbFS.Deleted -= FileRemoved;
mUsbFS.Dispose();
mUsbFS = null;
}
}
}
}
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