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//
// System.Net.EndPointListener
//
// Author:
// Gonzalo Paniagua Javier (gonzalo@novell.com)
//
// Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if NET_2_0 && SECURITY_DEP
using System.IO;
using System.Net.Sockets;
using System.Collections;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Threading;
using Mono.Security.Authenticode;
namespace System.Net {
sealed class EndPointListener
{
IPEndPoint endpoint;
Socket sock;
Hashtable prefixes; // Dictionary <ListenerPrefix, HttpListener>
ArrayList unhandled; // List<ListenerPrefix> unhandled; host = '*'
ArrayList all; // List<ListenerPrefix> all; host = '+'
X509Certificate2 cert;
AsymmetricAlgorithm key;
bool secure;
Hashtable unregistered;
public EndPointListener (IPAddress addr, int port, bool secure)
{
if (secure) {
this.secure = secure;
LoadCertificateAndKey (addr, port);
}
endpoint = new IPEndPoint (addr, port);
sock = new Socket (addr.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
sock.Bind (endpoint);
sock.Listen (500);
SocketAsyncEventArgs args = new SocketAsyncEventArgs ();
args.UserToken = this;
args.Completed += OnAccept;
sock.AcceptAsync (args);
prefixes = new Hashtable ();
unregistered = Hashtable.Synchronized (new Hashtable ());
}
void LoadCertificateAndKey (IPAddress addr, int port)
{
// Actually load the certificate
try {
string dirname = Environment.GetFolderPath (Environment.SpecialFolder.ApplicationData);
string path = Path.Combine (dirname, ".mono");
path = Path.Combine (path, "httplistener");
string cert_file = Path.Combine (path, String.Format ("{0}.cer", port));
string pvk_file = Path.Combine (path, String.Format ("{0}.pvk", port));
cert = new X509Certificate2 (cert_file);
key = PrivateKey.CreateFromFile (pvk_file).RSA;
} catch {
// ignore errors
}
}
static void OnAccept (object sender, EventArgs e)
{
SocketAsyncEventArgs args = (SocketAsyncEventArgs) e;
EndPointListener epl = (EndPointListener) args.UserToken;
Socket accepted = null;
if (args.SocketError == SocketError.Success) {
accepted = args.AcceptSocket;
args.AcceptSocket = null;
}
try {
if (epl.sock != null)
epl.sock.AcceptAsync (args);
} catch {
if (accepted != null) {
try {
accepted.Close ();
} catch {}
accepted = null;
}
}
if (accepted == null)
return;
if (epl.secure && (epl.cert == null || epl.key == null)) {
accepted.Close ();
return;
}
HttpConnection conn = new HttpConnection (accepted, epl, epl.secure, epl.cert, epl.key);
epl.unregistered [conn] = conn;
conn.BeginReadRequest ();
}
internal void RemoveConnection (HttpConnection conn)
{
unregistered.Remove (conn);
}
public bool BindContext (HttpListenerContext context)
{
HttpListenerRequest req = context.Request;
ListenerPrefix prefix;
HttpListener listener = SearchListener (req.Url, out prefix);
if (listener == null)
return false;
context.Listener = listener;
context.Connection.Prefix = prefix;
return true;
}
public void UnbindContext (HttpListenerContext context)
{
if (context == null || context.Request == null)
return;
context.Listener.UnregisterContext (context);
}
HttpListener SearchListener (Uri uri, out ListenerPrefix prefix)
{
prefix = null;
if (uri == null)
return null;
string host = uri.Host;
int port = uri.Port;
string path = HttpUtility.UrlDecode (uri.AbsolutePath);
string path_slash = path [path.Length - 1] == '/' ? path : path + "/";
HttpListener best_match = null;
int best_length = -1;
if (host != null && host != "") {
Hashtable p_ro = prefixes;
foreach (ListenerPrefix p in p_ro.Keys) {
string ppath = p.Path;
if (ppath.Length < best_length)
continue;
if (p.Host != host || p.Port != port)
continue;
if (path.StartsWith (ppath) || path_slash.StartsWith (ppath)) {
best_length = ppath.Length;
best_match = (HttpListener) p_ro [p];
prefix = p;
}
}
if (best_length != -1)
return best_match;
}
ArrayList list = unhandled;
best_match = MatchFromList (host, path, list, out prefix);
if (best_match != null)
return best_match;
list = all;
best_match = MatchFromList (host, path, list, out prefix);
if (best_match != null)
return best_match;
return null;
}
HttpListener MatchFromList (string host, string path, ArrayList list, out ListenerPrefix prefix)
{
prefix = null;
if (list == null)
return null;
HttpListener best_match = null;
int best_length = -1;
foreach (ListenerPrefix p in list) {
string ppath = p.Path;
if (ppath.Length < best_length)
continue;
if (path.StartsWith (ppath)) {
best_length = ppath.Length;
best_match = p.Listener;
prefix = p;
}
}
return best_match;
}
void AddSpecial (ArrayList coll, ListenerPrefix prefix)
{
if (coll == null)
return;
foreach (ListenerPrefix p in coll) {
if (p.Path == prefix.Path) //TODO: code
throw new HttpListenerException (400, "Prefix already in use.");
}
coll.Add (prefix);
}
bool RemoveSpecial (ArrayList coll, ListenerPrefix prefix)
{
if (coll == null)
return false;
int c = coll.Count;
for (int i = 0; i < c; i++) {
ListenerPrefix p = (ListenerPrefix) coll [i];
if (p.Path == prefix.Path) {
coll.RemoveAt (i);
return true;
}
}
return false;
}
void CheckIfRemove ()
{
if (prefixes.Count > 0)
return;
ArrayList list = unhandled;
if (list != null && list.Count > 0)
return;
list = all;
if (list != null && list.Count > 0)
return;
EndPointManager.RemoveEndPoint (this, endpoint);
}
public void Close ()
{
sock.Close ();
lock (unregistered.SyncRoot) {
foreach (HttpConnection c in unregistered.Keys)
c.Close (true);
unregistered.Clear ();
}
}
public void AddPrefix (ListenerPrefix prefix, HttpListener listener)
{
ArrayList current;
ArrayList future;
if (prefix.Host == "*") {
do {
current = unhandled;
future = (current != null) ? (ArrayList) current.Clone () : new ArrayList ();
prefix.Listener = listener;
AddSpecial (future, prefix);
} while (Interlocked.CompareExchange (ref unhandled, future, current) != current);
return;
}
if (prefix.Host == "+") {
do {
current = all;
future = (current != null) ? (ArrayList) current.Clone () : new ArrayList ();
prefix.Listener = listener;
AddSpecial (future, prefix);
} while (Interlocked.CompareExchange (ref all, future, current) != current);
return;
}
Hashtable prefs, p2;
do {
prefs = prefixes;
if (prefs.ContainsKey (prefix)) {
HttpListener other = (HttpListener) prefs [prefix];
if (other != listener) // TODO: code.
throw new HttpListenerException (400, "There's another listener for " + prefix);
return;
}
p2 = (Hashtable) prefs.Clone ();
p2 [prefix] = listener;
} while (Interlocked.CompareExchange (ref prefixes, p2, prefs) != prefs);
}
public void RemovePrefix (ListenerPrefix prefix, HttpListener listener)
{
ArrayList current;
ArrayList future;
if (prefix.Host == "*") {
do {
current = unhandled;
future = (current != null) ? (ArrayList) current.Clone () : new ArrayList ();
if (!RemoveSpecial (future, prefix))
break; // Prefix not found
} while (Interlocked.CompareExchange (ref unhandled, future, current) != current);
CheckIfRemove ();
return;
}
if (prefix.Host == "+") {
do {
current = all;
future = (current != null) ? (ArrayList) current.Clone () : new ArrayList ();
if (!RemoveSpecial (future, prefix))
break; // Prefix not found
} while (Interlocked.CompareExchange (ref all, future, current) != current);
CheckIfRemove ();
return;
}
Hashtable prefs, p2;
do {
prefs = prefixes;
if (!prefs.ContainsKey (prefix))
break;
p2 = (Hashtable) prefs.Clone ();
p2.Remove (prefix);
} while (Interlocked.CompareExchange (ref prefixes, p2, prefs) != prefs);
CheckIfRemove ();
}
}
}
#endif
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