mcs/class/System/System.Net/EndPointManager.cs

   1 //
   2 // System.Net.EndPointManager
   3 //
   4 // Author:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //
   7 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if SECURITY_DEP
  30
  31 using System.Collections;
  32 using System.Collections.Generic;
  33 namespace System.Net {
  34         sealed class EndPointManager
  35         {
  36                 // Dictionary<IPAddress, Dictionary<int, EndPointListener>>
  37                 static Hashtable ip_to_endpoints = new Hashtable ();
  38
  39                 private EndPointManager ()
  40                 {
  41                 }
  42
  43                 public static void AddListener (HttpListener listener)
  44                 {
  45                         ArrayList added = new ArrayList ();
  46                         try {
  47                                 lock (ip_to_endpoints) {
  48                                         foreach (string prefix in listener.Prefixes) {
  49                                                 AddPrefixInternal (prefix, listener);
  50                                                 added.Add (prefix);
  51                                         }
  52                                 }
  53                         } catch {
  54                                 foreach (string prefix in added) {
  55                                         RemovePrefix (prefix, listener);
  56                                 }
  57                                 throw;
  58                         }
  59                 }
  60
  61                 public static void AddPrefix (string prefix, HttpListener listener)
  62                 {
  63                         lock (ip_to_endpoints) {
  64                                 AddPrefixInternal (prefix, listener);
  65                         }
  66                 }
  67
  68                 static void AddPrefixInternal (string p, HttpListener listener)
  69                 {
  70                         ListenerPrefix lp = new ListenerPrefix (p);
  71                         if (lp.Path.IndexOf ('%') != -1)
  72                                 throw new HttpListenerException (400, "Invalid path.");
  73
  74                         if (lp.Path.IndexOf ("//", StringComparison.Ordinal) != -1) // TODO: Code?
  75                                 throw new HttpListenerException (400, "Invalid path.");
  76
  77                         // listens on all the interfaces if host name cannot be parsed by IPAddress.
  78                         EndPointListener epl = GetEPListener (lp.Host, lp.Port, listener, lp.Secure);
  79                         epl.AddPrefix (lp, listener);
  80                 }
  81
  82                 static EndPointListener GetEPListener (string host, int port, HttpListener listener, bool secure)
  83                 {
  84                         IPAddress addr;
  85                         if (host == "*")
  86                                 addr = IPAddress.Any;
  87                         else if (IPAddress.TryParse(host, out addr) == false){
  88                                 try {
  89                                         IPHostEntry iphost = Dns.GetHostByName(host);
  90                                         if (iphost != null)
  91                                                 addr = iphost.AddressList[0];
  92                                         else
  93                                                 addr = IPAddress.Any;
  94                                 } catch {
  95                                         addr = IPAddress.Any;
  96                                 }
  97                         }
  98                         Hashtable p = null;  // Dictionary<int, EndPointListener>
  99                         if (ip_to_endpoints.ContainsKey (addr)) {
 100                                 p = (Hashtable) ip_to_endpoints [addr];
 101                         } else {
 102                                 p = new Hashtable ();
 103                                 ip_to_endpoints [addr] = p;
 104                         }
 105
 106                         EndPointListener epl = null;
 107                         if (p.ContainsKey (port)) {
 108                                 epl = (EndPointListener) p [port];
 109                         } else {
 110                                 epl = new EndPointListener (listener, addr, port, secure);
 111                                 p [port] = epl;
 112                         }
 113
 114                         return epl;
 115                 }
 116
 117                 public static void RemoveEndPoint (EndPointListener epl, IPEndPoint ep)
 118                 {
 119                         lock (ip_to_endpoints) {
 120                                 // Dictionary<int, EndPointListener> p
 121                                 Hashtable p = null;
 122                                 p = (Hashtable) ip_to_endpoints [ep.Address];
 123                                 p.Remove (ep.Port);
 124                                 if (p.Count == 0) {
 125                                         ip_to_endpoints.Remove (ep.Address);
 126                                 }
 127                                 epl.Close ();
 128                         }
 129                 }
 130
 131                 public static void RemoveListener (HttpListener listener)
 132                 {
 133                         lock (ip_to_endpoints) {
 134                                 foreach (string prefix in listener.Prefixes) {
 135                                         RemovePrefixInternal (prefix, listener);
 136                                 }
 137                         }
 138                 }
 139
 140                 public static void RemovePrefix (string prefix, HttpListener listener)
 141                 {
 142                         lock (ip_to_endpoints) {
 143                                 RemovePrefixInternal (prefix, listener);
 144                         }
 145                 }
 146
 147                 static void RemovePrefixInternal (string prefix, HttpListener listener)
 148                 {
 149                         ListenerPrefix lp = new ListenerPrefix (prefix);
 150                         if (lp.Path.IndexOf ('%') != -1)
 151                                 return;
 152
 153                         if (lp.Path.IndexOf ("//", StringComparison.Ordinal) != -1)
 154                                 return;
 155
 156                         EndPointListener epl = GetEPListener (lp.Host, lp.Port, listener, lp.Secure);
 157                         epl.RemovePrefix (lp, listener);
 158                 }
 159         }
 160 }
 161 #endif
 162