internal byte[] TakeEntity()
{
byte[] bytes;
if (this.iEntityBodyOffset < 0)
{
throw new InvalidDataException("Request Entity Body Offset must not be negative");
}
long num = this.m_requestData.Length - this.iEntityBodyOffset;
long num2 = this._calculateExpectedEntityTransferSize();
if (num > num2)
{
//KProxyApplication.Log.LogFormat("HTTP Pipelining Client detected; excess data on client socket for session #{0}.", new object[] { this.m_session.id });
try
{
bytes = new byte[num - num2];
this.m_requestData.Position = this.iEntityBodyOffset + num2;
this.m_requestData.Read(bytes, 0, bytes.Length);
}
catch (OutOfMemoryException exception)
{
KProxyApplication.ReportException(exception, "HTTP Request Pipeline Too Large");
bytes = Encoding.ASCII.GetBytes("Kavprot Proxy: Out of memory");
this.m_session.PoisonClientPipe();
return(new byte[0]);
}
this.pipeClient.putBackSomeBytes(bytes);
num = num2;
}
if ((num != num2) && (num < num2))
{
KProxyApplication.HandleHTTPError(this.m_session, SessionFlags.ProtocolViolationInRequest, true, true, string.Format("Content-Length mismatch: Request Header indicated {0:N0} bytes, but client sent {1:N0} bytes.", num2, num));
}
try
{
bytes = new byte[num];
this.m_requestData.Position = this.iEntityBodyOffset;
this.m_requestData.Read(bytes, 0, bytes.Length);
}
catch (OutOfMemoryException exception2)
{
KProxyApplication.ReportException(exception2, "HTTP Request Too Large");
bytes = Encoding.ASCII.GetBytes("Kavprot Proxy: Out of memory");
this.m_session.PoisonClientPipe();
}
this._freeRequestData();
return(bytes);
}
private void _NotifyThreadExecute(object objThreadState)
{
PrefChangeEventArgs e = (PrefChangeEventArgs)objThreadState;
string prefName = e.PrefName;
List <EventHandler <PrefChangeEventArgs> > list = null;
try
{
GetReaderLock(this._RWLockWatchers);
try
{
foreach (PrefWatcher watcher in this._listWatchers)
{
if (prefName.StartsWith(watcher.sPrefixToWatch, StringComparison.Ordinal))
{
if (list == null)
{
list = new List <EventHandler <PrefChangeEventArgs> >();
}
list.Add(watcher.fnToNotify);
}
}
}
finally
{
FreeReaderLock(this._RWLockWatchers);
}
if (list != null)
{
foreach (EventHandler <PrefChangeEventArgs> handler in list)
{
try
{
handler(this, e);
}
catch (Exception exception)
{
KProxyApplication.ReportException(exception);
}
}
}
}
catch (Exception exception2)
{
KProxyApplication.ReportException(exception2);
}
}
internal static bool exportRootToDesktop()
{
try
{
byte[] bytes = getRootCertBytes();
if (bytes != null)
{
File.WriteAllBytes(Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) + @"\ASRoot.cer", bytes);
return(true);
}
}
catch (Exception exception)
{
KProxyApplication.ReportException(exception);
return(false);
}
return(false);
}
internal byte[] TakeEntity()
{
byte[] bytes;
try
{
bytes = new byte[this.m_responseData.Length - this.iEntityBodyOffset];
this.m_responseData.Position = this.iEntityBodyOffset;
this.m_responseData.Read(bytes, 0, bytes.Length);
}
catch (OutOfMemoryException exception)
{
KProxyApplication.ReportException(exception, "HTTP Response Too Large");
bytes = Encoding.ASCII.GetBytes("Kavprot Proxy: Out of memory");
this.m_session.PoisonServerPipe();
}
this.FreeResponseDataBuffer();
return(bytes);
}
private void NetworkChange_NetworkAddressChanged(object sender, EventArgs e)
{
try
{
DNSResolver.ClearCache();
//KProxyApplication.Log.LogString("NetworkAddressChanged.");
if (this.oAutoProxy != null)
{
this.oAutoProxy.iAutoProxySuccessCount = 0;
}
if ((KPCONFIG.bForwardToGateway && (this.piPrior != null)) && this.piPrior.bUseManualProxies)
{
this._DetermineGatewayIPEndPoints();
}
}
catch (Exception exception)
{
KProxyApplication.ReportException(exception);
}
}
private void RunTunnel()
{
if (KProxyApplication.oProxy != null)
{
try
{
IPEndPoint ipepForwardHTTPS = null;
if (this._mySession.oFlags["x-overrideGateway"] != null)
{
if (string.Equals("DIRECT", this._mySession.oFlags["x-overrideGateway"], StringComparison.OrdinalIgnoreCase))
{
this._mySession.bypassGateway = true;
}
else
{
ipepForwardHTTPS = Utilities.IPEndPointFromHostPortString(this._mySession.oFlags["x-overrideGateway"]);
}
}
else if (!this._mySession.bypassGateway)
{
int tickCount = Environment.TickCount;
ipepForwardHTTPS = KProxyApplication.oProxy.FindGatewayForOrigin("https", this._mySession.oFlags["x-overrideHost"] ?? this._mySession.PathAndQuery);
this._mySession.Timers.GatewayDeterminationTime = Environment.TickCount - tickCount;
}
if (ipepForwardHTTPS != null)
{
this.TunnelToGateway(ipepForwardHTTPS);
}
else
{
this.TunnelDirectly();
}
}
catch (Exception exception)
{
KProxyApplication.ReportException(exception, "Uncaught Exception in Tunnel; Session #" + this._mySession.id.ToString());
}
}
}
internal ServerPipe DequeuePipe(string sPoolKey, int iPID, int HackiForSession)
{
Queue <ServerPipe> queue;
ServerPipe pipe;
Queue <ServerPipe> queue2;
if (!KPCONFIG.bReuseServerSockets)
{
return(null);
}
lock (this.thePool)
{
if ((((iPID == 0) || !this.thePool.TryGetValue(string.Format("PID{0}*{1}", iPID, sPoolKey), out queue)) || (queue.Count < 1)) && (!this.thePool.TryGetValue(sPoolKey, out queue) || (queue.Count < 1)))
{
return(null);
}
}
Monitor.Enter(queue2 = queue);
try
{
if (queue.Count == 0)
{
return(null);
}
pipe = queue.Dequeue();
}
catch (Exception exception)
{
KProxyApplication.ReportException(exception);
return(null);
}
finally
{
Monitor.Exit(queue2);
}
return(pipe);
}
internal bool ReadRequest()
{
if (this.m_requestData != null)
{
KProxyApplication.ReportException(new InvalidOperationException("ReadRequest called after requestData was null'd."));
return(false);
}
if (this.pipeClient == null)
{
KProxyApplication.ReportException(new InvalidOperationException("ReadRequest called after pipeClient was null'd."));
return(false);
}
this.m_requestData = new MemoryStream(0x1000);
this.pipeClient.IncrementUse(0);
this.m_session.SetBitFlag(SessionFlags.ClientPipeReused, this.pipeClient.iUseCount > 1);
this.pipeClient.setReceiveTimeout();
int iMaxByteCount = 0;
bool flag = false;
bool flag2 = false;
byte[] arrBuffer = new byte[_cbClientReadBuffer];
do
{
try
{
iMaxByteCount = this.pipeClient.Receive(arrBuffer);
}
catch (Exception exception)
{
KProxyApplication.DebugSpew("ReadRequest Failure: " + exception.Message);
flag = true;
}
if (iMaxByteCount <= 0)
{
flag2 = true;
KProxyApplication.DebugSpew("ReadRequest read 0 bytes!!!!!");
}
else
{
if (KPCONFIG.bDebugSpew)
{
KProxyApplication.DebugSpew("READ FROM: " + this.pipeClient.ToString() + ":\n" + Utilities.ByteArrayToHexView(arrBuffer, 0x20, iMaxByteCount));
}
if (this.m_requestData.Length == 0L)
{
this.m_session.Timers.ClientBeginRequest = DateTime.Now;
int index = 0;
while ((index < iMaxByteCount) && ((arrBuffer[index] == 13) || (arrBuffer[index] == 10)))
{
index++;
}
this.m_requestData.Write(arrBuffer, index, iMaxByteCount - index);
}
else
{
this.m_requestData.Write(arrBuffer, 0, iMaxByteCount);
}
}
}while ((!flag2 && !flag) && !this.isRequestComplete());
arrBuffer = null;
if (flag || (this.m_requestData.Length == 0L))
{
if ((this.pipeClient.iUseCount < 2) || (this.pipeClient.bIsSecured && (this.pipeClient.iUseCount < 3)))
{
//KProxyApplication.Log.LogFormat("[Kavprot Proxy] Failed to read {0} request from ({1}) new client socket, port {2}.", new object[] { this.pipeClient.bIsSecured ? "HTTPS" : "HTTP", this.m_session.oFlags["X-ProcessInfo"], this.m_session.oFlags["X-CLIENTPORT"] });
}
this._freeRequestData();
return(false);
}
if ((this.m_headers == null) || (this.m_session.state >= SessionStates.Done))
{
this._freeRequestData();
return(false);
}
if ("CONNECT" == this.m_headers.HTTPMethod)
{
this.m_session.isTunnel = true;
this.m_sHostFromURI = this.m_session.PathAndQuery;
}
if (this.m_sHostFromURI != null)
{
if (this.m_headers.Exists("Host") && !Utilities.areOriginsEquivalent(this.m_sHostFromURI, this.m_headers["Host"], (this.m_session.isTunnel || this.m_session.isHTTPS) ? 0x1bb : (this.m_session.isFTP ? 0x15 : 80)))
{
this.m_session.oFlags["X-Original-Host"] = this.m_headers["Host"];
this.m_headers["Host"] = this.m_sHostFromURI;
}
else if (!this.m_headers.Exists("Host"))
{
if (this.m_headers.HTTPVersion.Equals("HTTP/1.1", StringComparison.OrdinalIgnoreCase))
{
this.m_session.oFlags["X-Original-Host"] = string.Empty;
}
this.m_headers["Host"] = this.m_sHostFromURI;
}
this.m_sHostFromURI = null;
}
if (!this.m_headers.Exists("Host"))
{
this._freeRequestData();
return(false);
}
return(true);
}
internal bool Start(int iPort, bool bAllowRemote)
{
if (KPCONFIG.bIsViewOnly)
{
return(false);
}
bool flag = false;
try
{
flag = (bAllowRemote && KPCONFIG.bEnableIPv6) && Socket.OSSupportsIPv6;
}
catch (Exception exception)
{
KProxyApplication.DoNotifyUser(string.Concat(new object[] { "A Microsoft .NET configuration file (listed below) is corrupt and contains invalid data. You can often correct this error by installing updates from WindowsUpdate and/or reinstalling the .NET Framework.\n\n", exception.Message, "\nSource: ", exception.Source, "\n", exception.StackTrace, "\n\n", exception.InnerException, "\nKProxy v", Application.ProductVersion, (8 == IntPtr.Size) ? " (x64) " : " (x86) ", " [.NET ", Environment.Version, " on ", Environment.OSVersion.VersionString, "] " }), ".NET Configuration Error", MessageBoxIcon.Hand);
this.oAcceptor = null;
return(false);
}
try
{
if (flag)
{
this.oAcceptor = new Socket(AddressFamily.InterNetworkV6, SocketType.Stream, ProtocolType.Tcp);
if (Environment.OSVersion.Version.Major > 5)
{
this.oAcceptor.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.PacketInformation | SocketOptionName.KeepAlive, 0);
}
}
else
{
this.oAcceptor = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
}
if (KPCONFIG.ForceExclusivePort)
{
this.oAcceptor.ExclusiveAddressUse = true;
}
if (bAllowRemote)
{
if (flag)
{
this.oAcceptor.Bind(new IPEndPoint(IPAddress.IPv6Any, iPort));
}
else
{
this.oAcceptor.Bind(new IPEndPoint(IPAddress.Any, iPort));
}
}
else
{
this.oAcceptor.Bind(new IPEndPoint(IPAddress.Loopback, iPort));
}
this.oAcceptor.Listen(50);
}
catch (SocketException exception2)
{
string str = string.Empty;
string sTitle = "KProxy Cannot Listen";
switch (exception2.ErrorCode)
{
case 0x273f:
case 0x2741:
if (flag)
{
str = "\nThis often means that you've enabled IPv6 support inside Tools > Kavprot Proxy Options, but your computer has IPv6 disabled.";
}
break;
case 0x2740:
case 0x271d:
str = "\nThis is usually due to another service running on this port. Run NETSTAT -A at a command prompt.\nIf you don't want to stop using the other program, simply change the port used by KProxy.\nClick Tools > KProxy Options > Connections, select a new port, and restart KProxy.";
sTitle = "Kavprot Proxy Port in Use";
break;
}
this.oAcceptor = null;
KProxyApplication.DoNotifyUser(string.Format("Unable to bind to port [Localhost:{0}]. ErrorCode: {1}.\n{2}\n\n{3}\n\n{4}", new object[] { KPCONFIG.ListenPort, exception2.ErrorCode, str, exception2.ToString(), string.Concat(new object[] { "KProxy v", Application.ProductVersion, " [.NET ", Environment.Version, " on ", Environment.OSVersion.VersionString, "]" }) }), sTitle, MessageBoxIcon.Hand);
return(false);
}
catch (Exception exception3)
{
this.oAcceptor = null;
KProxyApplication.ReportException(exception3);
return(false);
}
try
{
this.oAcceptor.BeginAccept(new AsyncCallback(this.AcceptConnection), null);
}
catch (Exception exception4)
{
this.oAcceptor = null;
//KProxyApplication.Log.LogFormat("Kavprot Proxy BeginAccept() Exception: {0}", new object[] { exception4.Message });
return(false);
}
return(true);
}
internal bool ReadResponse()
{
int iMaxByteCount = 0;
bool flag = false;
bool flag2 = false;
bool flag3 = false;
byte[] arrBuffer = new byte[_cbServerReadBuffer];
do
{
try
{
iMaxByteCount = this.pipeServer.Receive(arrBuffer);
if (0L == this.m_session.Timers.ServerBeginResponse.Ticks)
{
this.m_session.Timers.ServerBeginResponse = DateTime.Now;
}
if (iMaxByteCount <= 0)
{
flag = true;
KProxyApplication.DoReadResponseBuffer(this.m_session, arrBuffer, 0);
}
else
{
if (KPCONFIG.bDebugSpew)
{
KProxyApplication.DebugSpew(Utilities.ByteArrayToHexView(arrBuffer, 0x20, iMaxByteCount));
}
if (!KProxyApplication.DoReadResponseBuffer(this.m_session, arrBuffer, iMaxByteCount))
{
flag2 = true;
}
this.m_responseData.Write(arrBuffer, 0, iMaxByteCount);
this.m_responseTotalDataCount += iMaxByteCount;
if ((this.m_inHeaders == null) && this.GetHeaders())
{
this.m_session.Timers.KProxyGotResponseHeaders = DateTime.Now;
if ((this.m_session.state == SessionStates.Aborted) && this.m_session.isAnyFlagSet(SessionFlags.ProtocolViolationInResponse))
{
return(false);
}
KProxyApplication.DoResponseHeadersAvailable(this.m_session);
if (KPCONFIG.bStreamAudioVideo)
{
string str = this.m_inHeaders["Content-Type"];
if ((str.StartsWith("video/", StringComparison.OrdinalIgnoreCase) || str.StartsWith("audio/", StringComparison.OrdinalIgnoreCase)) || str.StartsWith("application/x-mms-framed", StringComparison.OrdinalIgnoreCase))
{
this.m_session.bBufferResponse = false;
}
}
if (!this.m_session.bBufferResponse)
{
this.m_session.bBufferResponse = this.m_session.HTTPMethodIs("CONNECT");
}
if (!this.m_session.bBufferResponse && (this.m_session.oRequest.pipeClient == null))
{
this.m_session.bBufferResponse = true;
}
if ((!this.m_session.bBufferResponse && ((0x191 == this.m_inHeaders.HTTPResponseCode) || (0x197 == this.m_inHeaders.HTTPResponseCode))) && this.m_session.oFlags.ContainsKey("x-AutoAuth"))
{
this.m_session.bBufferResponse = true;
}
this.m_session.SetBitFlag(SessionFlags.ResponseStreamed, !this.m_session.bBufferResponse);
if (!this.m_session.bBufferResponse)
{
if (this.m_session.oFlags.ContainsKey("response-trickle-delay"))
{
int num2 = int.Parse(this.m_session.oFlags["response-trickle-delay"]);
this.m_session.oRequest.pipeClient.TransmitDelay = num2;
}
if (this.m_session.oFlags.ContainsKey("log-drop-response-body") || KProxyApplication.Prefs.GetBoolPref("KProxy.network.streaming.ForgetStreamedData", false))
{
flag3 = true;
}
}
}
if ((this.m_inHeaders != null) && this.m_session.isFlagSet(SessionFlags.ResponseStreamed))
{
this.LeakResponseBytes();
if (flag3)
{
this.m_session.SetBitFlag(SessionFlags.ResponseBodyDropped, true);
if (this._lngLastChunkInfoOffset > -1L)
{
this.ReleaseStreamedChunkedData();
}
else if (this.m_inHeaders.ExistsAndContains("Transfer-Encoding", "chunked"))
{
this.ReleaseStreamedChunkedData();
}
else
{
this.ReleaseStreamedData();
}
}
}
}
}
catch (Exception exception)
{
flag2 = true;
if (exception is OperationCanceledException)
{
this.m_session.state = SessionStates.Aborted;
}
else if (exception is OutOfMemoryException)
{
KProxyApplication.ReportException(exception);
this.m_session.state = SessionStates.Aborted;
}
else
{
}
}
}while ((!flag && !flag2) && ((this.m_inHeaders == null) || !this.isResponseBodyComplete()));
this.m_session.Timers.ServerDoneResponse = DateTime.Now;
if (this.m_session.isFlagSet(SessionFlags.ResponseStreamed))
{
this.m_session.Timers.ClientDoneResponse = this.m_session.Timers.ServerDoneResponse;
}
if ((this.m_responseTotalDataCount == 0L) && (this.m_inHeaders == null))
{
flag2 = true;
}
arrBuffer = null;
if (flag2)
{
this.m_responseData.Dispose();
this.m_responseData = null;
return(false);
}
if (this.m_inHeaders == null)
{
KProxyApplication.HandleHTTPError(this.m_session, SessionFlags.ProtocolViolationInResponse, true, true, "The Server did not return properly formatted HTTP Headers. Maybe missing altogether (e.g. HTTP/0.9), maybe only \\r\\r instead of \\r\\n\\r\\n?\n");
this.m_session.SetBitFlag(SessionFlags.ResponseStreamed, false);
this.m_inHeaders = new HTTPResponseHeaders(KPCONFIG.oHeaderEncoding);
this.m_inHeaders.HTTPVersion = "HTTP/1.0";
this.m_inHeaders.HTTPResponseCode = 200;
this.m_inHeaders.HTTPResponseStatus = "200 This buggy server did not return headers";
this.iEntityBodyOffset = 0;
return(true);
}
return(true);
}
public bool GetFromWinINET(string sConnectionName)
{
this.Clear();
try
{
INTERNET_PER_CONN_OPTION_LIST structure = new INTERNET_PER_CONN_OPTION_LIST();
INTERNET_PER_CONN_OPTION[] internet_per_conn_optionArray = new INTERNET_PER_CONN_OPTION[5];
if (sConnectionName == "DefaultLAN")
{
sConnectionName = null;
}
structure.Connection = sConnectionName;
structure.OptionCount = internet_per_conn_optionArray.Length;
structure.OptionError = 0;
internet_per_conn_optionArray[0] = new INTERNET_PER_CONN_OPTION();
internet_per_conn_optionArray[0].dwOption = 1;
internet_per_conn_optionArray[1] = new INTERNET_PER_CONN_OPTION();
internet_per_conn_optionArray[1].dwOption = 2;
internet_per_conn_optionArray[2] = new INTERNET_PER_CONN_OPTION();
internet_per_conn_optionArray[2].dwOption = 3;
internet_per_conn_optionArray[3] = new INTERNET_PER_CONN_OPTION();
internet_per_conn_optionArray[3].dwOption = 4;
internet_per_conn_optionArray[4] = new INTERNET_PER_CONN_OPTION();
internet_per_conn_optionArray[4].dwOption = 10;
int cb = 0;
for (int i = 0; i < internet_per_conn_optionArray.Length; i++)
{
cb += Marshal.SizeOf(internet_per_conn_optionArray[i]);
}
IntPtr ptr = Marshal.AllocCoTaskMem(cb);
IntPtr ptr2 = ptr;
for (int j = 0; j < internet_per_conn_optionArray.Length; j++)
{
Marshal.StructureToPtr(internet_per_conn_optionArray[j], ptr2, false);
ptr2 = (IntPtr)(((long)ptr2) + Marshal.SizeOf(internet_per_conn_optionArray[j]));
}
structure.pOptions = ptr;
structure.Size = Marshal.SizeOf(structure);
int size = structure.Size;
bool flag = InternetQueryOptionList(IntPtr.Zero, 0x4b, ref structure, ref size);
int num5 = Marshal.GetLastWin32Error();
if (!flag && (0x57 == num5))
{
internet_per_conn_optionArray[4].dwOption = 5;
ptr2 = ptr;
for (int k = 0; k < internet_per_conn_optionArray.Length; k++)
{
Marshal.StructureToPtr(internet_per_conn_optionArray[k], ptr2, false);
ptr2 = (IntPtr)(((long)ptr2) + Marshal.SizeOf(internet_per_conn_optionArray[k]));
}
structure.pOptions = ptr;
structure.Size = Marshal.SizeOf(structure);
size = structure.Size;
flag = InternetQueryOptionList(IntPtr.Zero, 0x4b, ref structure, ref size);
num5 = Marshal.GetLastWin32Error();
}
if (flag)
{
ptr2 = ptr;
for (int m = 0; m < internet_per_conn_optionArray.Length; m++)
{
Marshal.PtrToStructure(ptr2, internet_per_conn_optionArray[m]);
ptr2 = (IntPtr)(((long)ptr2) + Marshal.SizeOf(internet_per_conn_optionArray[m]));
}
this._bDirect = 1 == (internet_per_conn_optionArray[0].Value.dwValue & 1);
this._bUseConfigScript = 4 == (internet_per_conn_optionArray[0].Value.dwValue & 4);
this._bAutoDetect = 8 == (internet_per_conn_optionArray[0].Value.dwValue & 8);
this._bProxiesSpecified = 2 == (internet_per_conn_optionArray[0].Value.dwValue & 2);
if (internet_per_conn_optionArray[4].dwOption == 10)
{
this._bAutoDetectWasUserSet = 8 == (internet_per_conn_optionArray[4].Value.dwValue & 8);
}
else
{
this._bAutoDetectWasUserSet = this._bAutoDetect && (1 == (internet_per_conn_optionArray[4].Value.dwValue & 1));
}
this._sScriptURL = Marshal.PtrToStringAnsi(internet_per_conn_optionArray[3].Value.pszValue);
Utilities.GlobalFree(internet_per_conn_optionArray[3].Value.pszValue);
if (internet_per_conn_optionArray[1].Value.pszValue != IntPtr.Zero)
{
string sProxyString = Marshal.PtrToStringAnsi(internet_per_conn_optionArray[1].Value.pszValue);
Utilities.GlobalFree(internet_per_conn_optionArray[1].Value.pszValue);
this.InitializeFromProxyString(sProxyString);
}
if (internet_per_conn_optionArray[2].Value.pszValue != IntPtr.Zero)
{
this._sHostsThatBypass = Marshal.PtrToStringAnsi(internet_per_conn_optionArray[2].Value.pszValue);
Utilities.GlobalFree(internet_per_conn_optionArray[2].Value.pszValue);
this._bBypassIntranetHosts = this._sHostsThatBypass.Contains("<local>");
}
}
Marshal.FreeCoTaskMem(ptr);
return(flag);
}
catch (Exception exception)
{
KProxyApplication.ReportException(exception, "Unable to get proxy information for " + (sConnectionName ?? "DefaultLAN"));
return(false);
}
}