merge common implementations and server implementations

Emby.Server.Implementations/IO/SharpCifs/Netbios/Lmhosts.cs

@@ -0,0 +1,202 @@
+// This code is derived from jcifs smb client library <jcifs at samba dot org>
+// Ported by J. Arturo <webmaster at komodosoft dot net>
+//  
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// 
+// This library 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
+// Lesser General Public License for more details.
+// 
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+using System.IO;
+using SharpCifs.Smb;
+using SharpCifs.Util;
+using SharpCifs.Util.Sharpen;
+
+namespace SharpCifs.Netbios
+{
+	public class Lmhosts
+	{
+		private static readonly string Filename = Config.GetProperty("jcifs.netbios.lmhosts"
+			);
+
+		private static readonly Hashtable Tab = new Hashtable();
+
+		private static long _lastModified = 1L;
+
+		private static int _alt;
+
+		private static LogStream _log = LogStream.GetInstance();
+
+		/// <summary>
+		/// This is really just for
+		/// <see cref="SharpCifs.UniAddress">Jcifs.UniAddress</see>
+		/// . It does
+		/// not throw an
+		/// <see cref="UnknownHostException">Sharpen.UnknownHostException</see>
+		/// because this
+		/// is queried frequently and exceptions would be rather costly to
+		/// throw on a regular basis here.
+		/// </summary>
+		public static NbtAddress GetByName(string host)
+		{
+			lock (typeof(Lmhosts))
+			{
+				return GetByName(new Name(host, 0x20, null));
+			}
+		}
+
+		internal static NbtAddress GetByName(Name name)
+		{
+			lock (typeof(Lmhosts))
+			{
+				NbtAddress result = null;
+				try
+				{
+					if (Filename != null)
+					{
+						FilePath f = new FilePath(Filename);
+						long lm;
+						if ((lm = f.LastModified()) > _lastModified)
+						{
+							_lastModified = lm;
+							Tab.Clear();
+							_alt = 0;
+							
+							//path -> fileStream
+							//Populate(new FileReader(f));
+                            Populate(new FileReader(new FileStream(f, FileMode.Open)));
+						}
+						result = (NbtAddress)Tab[name];
+					}
+				}
+				catch (FileNotFoundException fnfe)
+				{
+					if (_log.Level > 1)
+					{
+						_log.WriteLine("lmhosts file: " + Filename);
+						Runtime.PrintStackTrace(fnfe, _log);
+					}
+				}
+				catch (IOException ioe)
+				{
+					if (_log.Level > 0)
+					{
+						Runtime.PrintStackTrace(ioe, _log);
+					}
+				}
+				return result;
+			}
+		}
+
+		/// <exception cref="System.IO.IOException"></exception>
+		internal static void Populate(StreamReader r)
+		{
+			string line;
+            BufferedReader br = new BufferedReader((InputStreamReader)r);
+			while ((line = br.ReadLine()) != null)
+			{
+				line = line.ToUpper().Trim();
+				if (line.Length == 0)
+				{
+				}
+				else
+				{
+					if (line[0] == '#')
+					{
+						if (line.StartsWith("#INCLUDE "))
+						{
+							line = Runtime.Substring(line, line.IndexOf('\\'));
+							string url = "smb:" + line.Replace('\\', '/');
+							if (_alt > 0)
+							{
+								try
+								{
+									Populate(new InputStreamReader(new SmbFileInputStream(url)));
+								}
+								catch (IOException ioe)
+								{
+									_log.WriteLine("lmhosts URL: " + url);
+									Runtime.PrintStackTrace(ioe, _log);
+									continue;
+								}
+								_alt--;
+								while ((line = br.ReadLine()) != null)
+								{
+									line = line.ToUpper().Trim();
+									if (line.StartsWith("#END_ALTERNATE"))
+									{
+										break;
+									}
+								}
+							}
+							else
+							{
+								Populate(new InputStreamReader(new SmbFileInputStream(url)));
+							}
+						}
+						else
+						{
+							if (line.StartsWith("#BEGIN_ALTERNATE"))
+							{
+								_alt++;
+							}
+							else
+							{
+								if (line.StartsWith("#END_ALTERNATE") && _alt > 0)
+								{
+									_alt--;
+									throw new IOException("no lmhosts alternate includes loaded");
+								}
+							}
+						}
+					}
+					else
+					{
+						if (char.IsDigit(line[0]))
+						{
+							char[] data = line.ToCharArray();
+							int ip;
+							int i;
+							int j;
+							Name name;
+							NbtAddress addr;
+							char c;
+							c = '.';
+							ip = i = 0;
+							for (; i < data.Length && c == '.'; i++)
+							{
+								int b = unchecked(0x00);
+								for (; i < data.Length && (c = data[i]) >= 48 && c <= 57; i++)
+								{
+									b = b * 10 + c - '0';
+								}
+								ip = (ip << 8) + b;
+							}
+							while (i < data.Length && char.IsWhiteSpace(data[i]))
+							{
+								i++;
+							}
+							j = i;
+							while (j < data.Length && char.IsWhiteSpace(data[j]) == false)
+							{
+								j++;
+							}
+							name = new Name(Runtime.Substring(line, i, j), unchecked(0x20), null
+								);
+							addr = new NbtAddress(name, ip, false, NbtAddress.BNode, false, false, true, true
+								, NbtAddress.UnknownMacAddress);
+							Tab.Put(name, addr);
+						}
+					}
+				}
+			}
+		}
+	}
+}