Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / ManagedLibraries / Remoting / Channels / IPC / IpcManager.cs / 1305376 / IpcManager.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //========================================================================== // File: IpcHandler.cs // Author: [....]@Microsoft.com // Summary: Class for managing a socket connection. // //========================================================================= using System; using System.IO; using System.Runtime.Remoting.Messaging; using System.Runtime.InteropServices; using System.Text; using System.Threading; using System.Runtime.Remoting.Channels.Tcp; using System.Globalization; namespace System.Runtime.Remoting.Channels.Ipc { internal class IpcServerHandler : TcpSocketHandler { // The stream to manage incoming request data private Stream _stream = null; protected Stream _requestStream = null; // NamePipe associated with this manager protected IpcPort _port; private RequestQueue _requestQueue; bool _bOneWayRequest; int _contentLength; internal IpcServerHandler(IpcPort port, RequestQueue requestQueue, Stream stream) : base (null, requestQueue, stream) { _requestQueue = requestQueue; _port = port; _stream = stream; } internal Stream GetRequestStream() { _requestStream = new TcpFixedLengthReadingStream(this, _contentLength); return _requestStream; } internal IpcPort Port { get { return _port; } } internal ITransportHeaders ReadHeaders() { BaseTransportHeaders headers = new BaseTransportHeaders(); UInt16 operation; ReadVersionAndOperation(out operation); if (operation == TcpOperations.OneWayRequest) { _bOneWayRequest = true; } bool bChunked = false; // content length must come next (may be chunked or a specific length) ReadContentLength(out bChunked, out _contentLength); // read to end of headers ReadToEndOfHeaders(headers); return headers; } protected new void ReadToEndOfHeaders(BaseTransportHeaders headers) { bool bError = false; String statusPhrase = null; UInt16 headerType = ReadUInt16(); while (headerType != TcpHeaders.EndOfHeaders) { if (headerType == TcpHeaders.Custom) { String headerName = ReadCountedString(); String headerValue = ReadCountedString(); headers[headerName] = headerValue; } else if (headerType == TcpHeaders.RequestUri) { ReadAndVerifyHeaderFormat("RequestUri", TcpHeaderFormat.CountedString); // read uri (and make sure that no channel specific data is present) String uri = ReadCountedString(); String channelURI; String objectURI; channelURI = IpcChannelHelper.ParseURL(uri, out objectURI); if (channelURI == null) objectURI = uri; headers.RequestUri = objectURI; } else if (headerType == TcpHeaders.StatusCode) { ReadAndVerifyHeaderFormat("StatusCode", TcpHeaderFormat.UInt16); UInt16 statusCode = ReadUInt16(); // We'll throw an exception here if there was an error. If an error // occurs above the transport level, the status code will still be // success here. if (statusCode != TcpStatusCode.Success) bError = true; } else if (headerType == TcpHeaders.StatusPhrase) { ReadAndVerifyHeaderFormat("StatusPhrase", TcpHeaderFormat.CountedString); statusPhrase = ReadCountedString(); } else if (headerType == TcpHeaders.ContentType) { ReadAndVerifyHeaderFormat("Content-Type", TcpHeaderFormat.CountedString); String contentType = ReadCountedString(); headers.ContentType = contentType; } else { // unknown header: Read header format and ignore rest of data byte headerFormat = (byte)ReadByte(); switch (headerFormat) { case TcpHeaderFormat.Void: break; case TcpHeaderFormat.CountedString: ReadCountedString(); break; case TcpHeaderFormat.Byte: ReadByte(); break; case TcpHeaderFormat.UInt16: ReadUInt16(); break; case TcpHeaderFormat.Int32: ReadInt32(); break; default: { // unknown format throw new RemotingException( String.Format( CultureInfo.CurrentCulture, CoreChannel.GetResourceString("Remoting_Tcp_UnknownHeaderType"), headerType, headerFormat)); } } // switch (format) } // read next header token headerType = ReadUInt16(); } // loop until end of headers // if an error occurred, throw an exception if (bError) { if (statusPhrase == null) statusPhrase = ""; throw new RemotingException( String.Format( CultureInfo.CurrentCulture, CoreChannel.GetResourceString("Remoting_Tcp_GenericServerError"), statusPhrase)); } } // ReadToEndOfHeaders private void ReadAndVerifyHeaderFormat(String headerName, byte expectedFormat) { byte headerFormat = (byte)ReadByte(); if (headerFormat != expectedFormat) { throw new RemotingException( String.Format( CultureInfo.CurrentCulture, CoreChannel.GetResourceString("Remoting_Tcp_IncorrectHeaderFormat"), expectedFormat, headerName)); } } // ReadAndVerifyHeaderFormat // Prepare for reading a new request off of the same socket protected override void PrepareForNewMessage() { } // PrepareForNewRequest protected override void SendErrorMessageIfPossible(Exception e) { // bail out if the original request was OneWay (means the client doesn't even // want or expect to receive responses or error messages) if (_bOneWayRequest) return; // build up headers and send ChunkedMemoryStream headerStream = new ChunkedMemoryStream(CoreChannel.BufferPool); // output preamble and version WritePreambleAndVersion(headerStream); // output opcode WriteUInt16(TcpOperations.Reply, headerStream); // output content length delimiter (0-length stream) WriteUInt16(TcpContentDelimiter.ContentLength, headerStream); WriteInt32(0, headerStream); // output status code and reason WriteUInt16(TcpHeaders.StatusCode, headerStream); WriteByte(TcpHeaderFormat.UInt16, headerStream); WriteUInt16(TcpStatusCode.GenericError, headerStream); // we purposely don't include the stack trace to avoid giving // out too much information for security purposes. WriteUInt16(TcpHeaders.StatusPhrase, headerStream); WriteByte(TcpHeaderFormat.CountedString, headerStream); WriteCountedString(e.ToString(), headerStream); // indicate that we are about to close the connection WriteUInt16(TcpHeaders.CloseConnection, headerStream); WriteByte(TcpHeaderFormat.Void, headerStream); // end of headers WriteUInt16(TcpHeaders.EndOfHeaders, headerStream); headerStream.WriteTo(NetStream); headerStream.Close(); } internal void SendResponse(ITransportHeaders headers, Stream contentStream) { // bail out if the original request was OneWay (means the client doesn't even // want or expect to receive responses or error messages) if (_bOneWayRequest) return; // build up headers and send ChunkedMemoryStream headerStream = new ChunkedMemoryStream(CoreChannel.BufferPool); // output preamble and version WritePreambleAndVersion(headerStream); // output opcode WriteUInt16(TcpOperations.Reply, headerStream); // output content length delimiter WriteUInt16(TcpContentDelimiter.ContentLength, headerStream); WriteInt32((int)contentStream.Length, headerStream); // No status code header is needed because if we're in this code path // the data transfer succeeded as far as the transport protocol is // concerned (and the success status code is optional). WriteHeaders(headers, headerStream); headerStream.WriteTo(NetStream); headerStream.Close(); StreamHelper.CopyStream(contentStream, NetStream); contentStream.Close(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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