diff options
Diffstat (limited to 'Emby.Server.Implementations/IO/SharpCifs/Netbios/Lmhosts.cs')
| -rw-r--r-- | Emby.Server.Implementations/IO/SharpCifs/Netbios/Lmhosts.cs | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/Emby.Server.Implementations/IO/SharpCifs/Netbios/Lmhosts.cs b/Emby.Server.Implementations/IO/SharpCifs/Netbios/Lmhosts.cs new file mode 100644 index 000000000..c94d0a260 --- /dev/null +++ b/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); + } + } + } + } + } + } +} |