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592 lines
15 KiB
592 lines
15 KiB
// This code is derived from jcifs smb client library <jcifs at samba dot org>
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// Ported by J. Arturo <webmaster at komodosoft dot net>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; 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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using System;
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using System.IO;
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using System.Linq;
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using System.Net;
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using SharpCifs.Netbios;
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using SharpCifs.Util;
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using SharpCifs.Util.Sharpen;
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using Extensions = SharpCifs.Util.Sharpen.Extensions;
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namespace SharpCifs
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{
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/// <summary>
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/// <p>Under normal conditions it is not necessary to use
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/// this class to use jCIFS properly.
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/// </summary>
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/// <remarks>
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/// <p>Under normal conditions it is not necessary to use
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/// this class to use jCIFS properly. Name resolusion is
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/// handled internally to the <code>jcifs.smb</code> package.
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/// <p>
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/// This class is a wrapper for both
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/// <see cref="Jcifs.Netbios.NbtAddress">Jcifs.Netbios.NbtAddress</see>
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/// and
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/// <see cref="System.Net.IPAddress">System.Net.IPAddress</see>
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/// . The name resolution mechanisms
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/// used will systematically query all available configured resolution
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/// services including WINS, broadcasts, DNS, and LMHOSTS. See
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/// <a href="../../resolver.html">Setting Name Resolution Properties</a>
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/// and the <code>jcifs.resolveOrder</code> property. Changing
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/// jCIFS name resolution properties can greatly affect the behavior of
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/// the client and may be necessary for proper operation.
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/// <p>
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/// This class should be used in favor of <tt>InetAddress</tt> to resolve
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/// hostnames on LANs and WANs that support a mixture of NetBIOS/WINS and
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/// DNS resolvable hosts.
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/// </remarks>
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public class UniAddress
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{
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private const int ResolverWins = 0;
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private const int ResolverBcast = 1;
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private const int ResolverDns = 2;
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private const int ResolverLmhosts = 3;
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private static int[] _resolveOrder;
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private static IPAddress _baddr;
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private static LogStream _log = LogStream.GetInstance();
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static UniAddress()
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{
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string ro = Config.GetProperty("jcifs.resolveOrder");
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IPAddress nbns = NbtAddress.GetWinsAddress();
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try
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{
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_baddr = Config.GetInetAddress("jcifs.netbios.baddr", Extensions.GetAddressByName
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("255.255.255.255"));
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}
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catch (UnknownHostException)
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{
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}
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if (string.IsNullOrEmpty(ro))
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{
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if (nbns == null)
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{
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_resolveOrder = new int[3];
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_resolveOrder[0] = ResolverLmhosts;
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_resolveOrder[1] = ResolverDns;
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_resolveOrder[2] = ResolverBcast;
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}
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else
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{
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_resolveOrder = new int[4];
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_resolveOrder[0] = ResolverLmhosts;
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_resolveOrder[1] = ResolverWins;
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_resolveOrder[2] = ResolverDns;
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_resolveOrder[3] = ResolverBcast;
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}
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}
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else
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{
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int[] tmp = new int[4];
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StringTokenizer st = new StringTokenizer(ro, ",");
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int i = 0;
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while (st.HasMoreTokens())
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{
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string s = st.NextToken().Trim();
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if (Runtime.EqualsIgnoreCase(s, "LMHOSTS"))
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{
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tmp[i++] = ResolverLmhosts;
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}
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else
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{
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if (Runtime.EqualsIgnoreCase(s, "WINS"))
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{
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if (nbns == null)
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{
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if (_log.Level > 1)
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{
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_log.WriteLine("UniAddress resolveOrder specifies WINS however the " + "jcifs.netbios.wins property has not been set"
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);
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}
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continue;
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}
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tmp[i++] = ResolverWins;
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}
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else
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{
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if (Runtime.EqualsIgnoreCase(s, "BCAST"))
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{
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tmp[i++] = ResolverBcast;
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}
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else
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{
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if (Runtime.EqualsIgnoreCase(s, "DNS"))
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{
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tmp[i++] = ResolverDns;
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}
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else
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{
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if (_log.Level > 1)
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{
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_log.WriteLine("unknown resolver method: " + s);
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}
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}
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}
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}
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}
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}
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_resolveOrder = new int[i];
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Array.Copy(tmp, 0, _resolveOrder, 0, i);
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}
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}
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internal class Sem
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{
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internal Sem(int count)
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{
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this.Count = count;
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}
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internal int Count;
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}
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internal class QueryThread : Thread
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{
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internal Sem Sem;
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internal string Host;
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internal string Scope;
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internal int Type;
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internal NbtAddress[] Ans;
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internal IPAddress Svr;
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internal UnknownHostException Uhe;
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internal QueryThread(Sem sem, string host, int type, string scope, IPAddress
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svr) : base("JCIFS-QueryThread: " + host)
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{
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this.Sem = sem;
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this.Host = host;
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this.Type = type;
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this.Scope = scope;
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this.Svr = svr;
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}
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public override void Run()
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{
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try
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{
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//Ans = new [] { NbtAddress.GetByName(Host, Type, Scope, Svr) };
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Ans = NbtAddress.GetAllByName(Host, Type, Scope, Svr);
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}
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catch (UnknownHostException uhe)
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{
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this.Uhe = uhe;
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}
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catch (Exception ex)
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{
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Uhe = new UnknownHostException(ex.Message);
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}
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finally
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{
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lock (Sem)
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{
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Sem.Count--;
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Runtime.Notify(Sem);
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}
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}
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}
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}
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/// <exception cref="UnknownHostException"></exception>
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internal static NbtAddress[] LookupServerOrWorkgroup(string name, IPAddress svr)
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{
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Sem sem = new Sem(2);
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int type = NbtAddress.IsWins(svr) ? unchecked(0x1b) : unchecked(0x1d);
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QueryThread q1X = new QueryThread(sem, name, type, null, svr
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);
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QueryThread q20 = new QueryThread(sem, name, unchecked(0x20), null, svr);
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q1X.SetDaemon(true);
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q20.SetDaemon(true);
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try
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{
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lock (sem)
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{
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q1X.Start();
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q20.Start();
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while (sem.Count > 0 && q1X.Ans == null && q20.Ans == null)
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{
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Runtime.Wait(sem);
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}
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}
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}
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catch (Exception)
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{
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throw new UnknownHostException(name);
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}
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if (q1X.Ans != null)
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{
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return q1X.Ans;
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}
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if (q20.Ans != null)
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{
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return q20.Ans;
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}
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throw q1X.Uhe;
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}
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/// <summary>Determines the address of a host given it's host name.</summary>
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/// <remarks>
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/// Determines the address of a host given it's host name. The name can be a
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/// machine name like "jcifs.samba.org", or an IP address like "192.168.1.15".
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/// </remarks>
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/// <param name="hostname">NetBIOS or DNS hostname to resolve</param>
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/// <exception cref="UnknownHostException">if there is an error resolving the name
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/// </exception>
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public static UniAddress GetByName(string hostname)
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{
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return GetByName(hostname, false);
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}
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internal static bool IsDotQuadIp(string hostname)
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{
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if (char.IsDigit(hostname[0]))
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{
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int i;
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int len;
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int dots;
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char[] data;
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i = dots = 0;
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len = hostname.Length;
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data = hostname.ToCharArray();
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while (i < len && char.IsDigit(data[i++]))
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{
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if (i == len && dots == 3)
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{
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// probably an IP address
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return true;
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}
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if (i < len && data[i] == '.')
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{
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dots++;
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i++;
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}
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}
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}
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return false;
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}
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internal static bool IsAllDigits(string hostname)
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{
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for (int i = 0; i < hostname.Length; i++)
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{
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if (char.IsDigit(hostname[i]) == false)
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{
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return false;
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}
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}
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return true;
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}
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/// <summary>Lookup <tt>hostname</tt> and return it's <tt>UniAddress</tt>.</summary>
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/// <remarks>
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/// Lookup <tt>hostname</tt> and return it's <tt>UniAddress</tt>. If the
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/// <tt>possibleNTDomainOrWorkgroup</tt> parameter is <tt>true</tt> an
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/// addtional name query will be performed to locate a master browser.
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/// </remarks>
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/// <exception cref="UnknownHostException"></exception>
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public static UniAddress GetByName(string hostname, bool possibleNtDomainOrWorkgroup
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)
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{
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UniAddress[] addrs = GetAllByName(hostname, possibleNtDomainOrWorkgroup
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);
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return addrs[0];
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}
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/// <exception cref="UnknownHostException"></exception>
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public static UniAddress[] GetAllByName(string hostname, bool possibleNtDomainOrWorkgroup
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)
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{
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object addr;
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int i;
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if (string.IsNullOrEmpty(hostname))
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{
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throw new UnknownHostException();
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}
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if (IsDotQuadIp(hostname))
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{
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UniAddress[] addrs = new UniAddress[1];
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addrs[0] = new UniAddress(NbtAddress.GetByName(hostname));
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return addrs;
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}
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for (i = 0; i < _resolveOrder.Length; i++)
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{
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try
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{
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switch (_resolveOrder[i])
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{
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case ResolverLmhosts:
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{
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if ((addr = Lmhosts.GetByName(hostname)) == null)
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{
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continue;
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}
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break;
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}
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case ResolverWins:
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{
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if (hostname == NbtAddress.MasterBrowserName || hostname.Length > 15)
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{
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// invalid netbios name
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continue;
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}
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if (possibleNtDomainOrWorkgroup)
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{
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addr = LookupServerOrWorkgroup(hostname, NbtAddress.GetWinsAddress());
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}
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else
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{
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addr = NbtAddress.GetByName(hostname, unchecked(0x20), null, NbtAddress.GetWinsAddress
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());
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}
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break;
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}
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case ResolverBcast:
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{
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if (hostname.Length > 15)
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{
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// invalid netbios name
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continue;
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}
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try
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{
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if (possibleNtDomainOrWorkgroup)
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{
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NbtAddress[] iaddrs = LookupServerOrWorkgroup(hostname, _baddr);
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UniAddress[] addrs = new UniAddress[iaddrs.Length];
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for (int ii = 0; ii < iaddrs.Length; ii++)
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{
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addrs[ii] = new UniAddress(iaddrs[ii]);
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}
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return addrs;
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}
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else
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{
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addr = NbtAddress.GetByName(hostname, unchecked(0x20), null, _baddr);
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}
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}
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catch (Exception ex)
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{
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if (i == _resolveOrder.Length - 1)
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{
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throw ex;
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}
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else
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{
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continue;
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}
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}
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break;
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}
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case ResolverDns:
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{
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if (IsAllDigits(hostname))
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{
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throw new UnknownHostException(hostname);
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}
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IPAddress[] iaddrs = Extensions.GetAddressesByName(hostname);
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if (iaddrs == null || iaddrs.Length == 0)
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{
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continue;
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}
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return iaddrs.Select(iaddr => new UniAddress(iaddr)).ToArray();
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}
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default:
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{
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// Success
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throw new UnknownHostException(hostname);
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}
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}
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UniAddress[] addrs1 = new UniAddress[1];
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addrs1[0] = new UniAddress(addr);
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return addrs1;
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}
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catch (IOException)
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{
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}
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}
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// Success
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// Failure
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throw new UnknownHostException(hostname);
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}
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internal object Addr;
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internal string CalledName;
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/// <summary>
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/// Create a <tt>UniAddress</tt> by wrapping an <tt>InetAddress</tt> or
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/// <tt>NbtAddress</tt>.
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/// </summary>
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/// <remarks>
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/// Create a <tt>UniAddress</tt> by wrapping an <tt>InetAddress</tt> or
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/// <tt>NbtAddress</tt>.
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/// </remarks>
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public UniAddress(object addr)
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{
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if (addr == null)
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{
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throw new ArgumentException();
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}
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this.Addr = addr;
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}
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/// <summary>Return the IP address of this address as a 32 bit integer.</summary>
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/// <remarks>Return the IP address of this address as a 32 bit integer.</remarks>
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public override int GetHashCode()
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{
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return Addr.GetHashCode();
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}
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/// <summary>Compare two addresses for equality.</summary>
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/// <remarks>
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/// Compare two addresses for equality. Two <tt>UniAddress</tt>s are equal
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/// if they are both <tt>UniAddress</tt>' and refer to the same IP address.
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/// </remarks>
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public override bool Equals(object obj)
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{
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return obj is UniAddress && Addr.Equals(((UniAddress)obj).Addr);
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}
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/// <summary>Guess first called name to try for session establishment.</summary>
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/// <remarks>
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/// Guess first called name to try for session establishment. This
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/// method is used exclusively by the <tt>jcifs.smb</tt> package.
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/// </remarks>
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public virtual string FirstCalledName()
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{
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if (Addr is NbtAddress)
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{
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return ((NbtAddress)Addr).FirstCalledName();
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}
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CalledName = ((IPAddress) Addr).GetHostAddress();
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if (IsDotQuadIp(CalledName))
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{
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CalledName = NbtAddress.SmbserverName;
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}
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else
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{
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int i = CalledName.IndexOf('.');
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if (i > 1 && i < 15)
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{
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CalledName = Runtime.Substring(CalledName, 0, i).ToUpper();
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}
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else
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{
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if (CalledName.Length > 15)
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{
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CalledName = NbtAddress.SmbserverName;
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}
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else
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{
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CalledName = CalledName.ToUpper();
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}
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}
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}
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return CalledName;
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}
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/// <summary>Guess next called name to try for session establishment.</summary>
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/// <remarks>
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/// Guess next called name to try for session establishment. This
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/// method is used exclusively by the <tt>jcifs.smb</tt> package.
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/// </remarks>
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public virtual string NextCalledName()
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{
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if (Addr is NbtAddress)
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{
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return ((NbtAddress)Addr).NextCalledName();
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}
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if (CalledName != NbtAddress.SmbserverName)
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{
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CalledName = NbtAddress.SmbserverName;
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return CalledName;
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}
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return null;
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}
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/// <summary>Return the underlying <tt>NbtAddress</tt> or <tt>InetAddress</tt>.</summary>
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/// <remarks>Return the underlying <tt>NbtAddress</tt> or <tt>InetAddress</tt>.</remarks>
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public virtual object GetAddress()
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{
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return Addr;
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}
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/// <summary>Return the hostname of this address such as "MYCOMPUTER".</summary>
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/// <remarks>Return the hostname of this address such as "MYCOMPUTER".</remarks>
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public virtual string GetHostName()
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{
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if (Addr is NbtAddress)
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{
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return ((NbtAddress)Addr).GetHostName();
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}
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return ((IPAddress) Addr).GetHostAddress();
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}
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/// <summary>Return the IP address as text such as "192.168.1.15".</summary>
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/// <remarks>Return the IP address as text such as "192.168.1.15".</remarks>
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public virtual string GetHostAddress()
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{
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if (Addr is NbtAddress)
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{
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return ((NbtAddress)Addr).GetHostAddress();
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}
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return ((IPAddress)Addr).GetHostAddress();
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}
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public virtual IPAddress GetHostIpAddress()
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{
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return (IPAddress) Addr;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Return the a text representation of this address such as
|
|
/// <tt>MYCOMPUTER/192.168.1.15</tt>.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// Return the a text representation of this address such as
|
|
/// <tt>MYCOMPUTER/192.168.1.15</tt>.
|
|
/// </remarks>
|
|
public override string ToString()
|
|
{
|
|
return Addr.ToString();
|
|
}
|
|
}
|
|
}
|