251 lines
9.5 KiB
C++
251 lines
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_net_TLSFilterTransaction_h
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#define mozilla_net_TLSFilterTransaction_h
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#include "mozilla/Attributes.h"
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#include "mozilla/UniquePtr.h"
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#include "nsAHttpTransaction.h"
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#include "nsIAsyncInputStream.h"
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#include "nsIAsyncOutputStream.h"
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#include "nsISocketTransport.h"
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#include "nsITimer.h"
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#include "NullHttpTransaction.h"
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#include "mozilla/TimeStamp.h"
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#include "prio.h"
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// a TLSFilterTransaction wraps another nsAHttpTransaction but
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// applies a encode/decode filter of TLS onto the ReadSegments
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// and WriteSegments data. It is not used for basic https://
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// but it is used for supplemental TLS tunnels - such as those
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// needed by CONNECT tunnels in HTTP/2 or even CONNECT tunnels when
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// the underlying proxy connection is already running TLS
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//
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// HTTP/2 CONNECT tunnels cannot use pushed IO layers because of
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// the multiplexing involved on the base stream. i.e. the base stream
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// once it is decrypted may have parts that are encrypted with a
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// variety of keys, or none at all
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/* ************************************************************************
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The input path of http over a spdy CONNECT tunnel once it is established as a stream
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note the "real http transaction" can be either a http/1 transaction or another spdy session
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inside the tunnel.
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nsHttpConnection::OnInputStreamReady (real socket)
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nsHttpConnection::OnSocketReadable()
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SpdySession::WriteSegment()
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SpdyStream::WriteSegment (tunnel stream)
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SpdyConnectTransaction::WriteSegment
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SpdyStream::OnWriteSegment(tunnel stream)
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SpdySession::OnWriteSegment()
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SpdySession::NetworkRead()
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nsHttpConnection::OnWriteSegment (real socket)
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realSocketIn->Read() return data from network
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now pop the stack back up to SpdyConnectTransaction::WriteSegment, the data
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that has been read is stored mInputData
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SpdyConnectTransaction.mTunneledConn::OnInputStreamReady(mTunnelStreamIn)
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SpdyConnectTransaction.mTunneledConn::OnSocketReadable()
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TLSFilterTransaction::WriteSegment()
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nsHttpTransaction::WriteSegment(real http transaction)
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TLSFilterTransaction::OnWriteSegment() removes tls on way back up stack
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SpdyConnectTransaction.mTunneledConn::OnWriteSegment()
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SpdyConnectTransaction.mTunneledConn.mTunnelStreamIn->Read() // gets data from mInputData
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The output path works similarly:
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nsHttpConnection::OnOutputStreamReady (real socket)
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nsHttpConnection::OnSocketWritable()
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SpdySession::ReadSegments (locates tunnel)
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SpdyStream::ReadSegments (tunnel stream)
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SpdyConnectTransaction::ReadSegments()
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SpdyConnectTransaction.mTunneledConn::OnOutputStreamReady (tunnel connection)
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SpdyConnectTransaction.mTunneledConn::OnSocketWritable (tunnel connection)
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TLSFilterTransaction::ReadSegment()
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nsHttpTransaction::ReadSegment (real http transaction generates plaintext on way down)
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TLSFilterTransaction::OnReadSegment (BUF and LEN gets encrypted here on way down)
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SpdyConnectTransaction.mTunneledConn::OnReadSegment (BUF and LEN) (tunnel connection)
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SpdyConnectTransaction.mTunneledConn.mTunnelStreamOut->Write(BUF, LEN) .. get stored in mOutputData
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Now pop the stack back up to SpdyConnectTransaction::ReadSegment(), where it has
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the encrypted text available in mOutputData
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SpdyStream->OnReadSegment(BUF,LEN) from mOutputData. Tunnel stream
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SpdySession->OnReadSegment() // encrypted data gets put in a data frame
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nsHttpConnection->OnReadSegment()
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realSocketOut->write() writes data to network
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**************************************************************************/
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struct PRSocketOptionData;
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namespace mozilla { namespace net {
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class nsHttpRequestHead;
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class NullHttpTransaction;
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class TLSFilterTransaction;
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class NudgeTunnelCallback : public nsISupports
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{
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public:
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virtual void OnTunnelNudged(TLSFilterTransaction *) = 0;
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};
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#define NS_DECL_NUDGETUNNELCALLBACK void OnTunnelNudged(TLSFilterTransaction *) override;
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class TLSFilterTransaction final
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: public nsAHttpTransaction
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, public nsAHttpSegmentReader
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, public nsAHttpSegmentWriter
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, public nsITimerCallback
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{
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~TLSFilterTransaction();
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSAHTTPTRANSACTION
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NS_DECL_NSAHTTPSEGMENTREADER
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NS_DECL_NSAHTTPSEGMENTWRITER
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NS_DECL_NSITIMERCALLBACK
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TLSFilterTransaction(nsAHttpTransaction *aWrappedTransaction,
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const char *tlsHost, int32_t tlsPort,
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nsAHttpSegmentReader *reader,
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nsAHttpSegmentWriter *writer);
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const nsAHttpTransaction *Transaction() const { return mTransaction.get(); }
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nsresult CommitToSegmentSize(uint32_t size, bool forceCommitment) override;
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nsresult GetTransactionSecurityInfo(nsISupports **) override;
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nsresult NudgeTunnel(NudgeTunnelCallback *callback);
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nsresult SetProxiedTransaction(nsAHttpTransaction *aTrans);
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void newIODriver(nsIAsyncInputStream *aSocketIn,
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nsIAsyncOutputStream *aSocketOut,
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nsIAsyncInputStream **outSocketIn,
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nsIAsyncOutputStream **outSocketOut);
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// nsAHttpTransaction overloads
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nsHttpPipeline *QueryPipeline() override;
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bool IsNullTransaction() override;
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NullHttpTransaction *QueryNullTransaction() override;
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nsHttpTransaction *QueryHttpTransaction() override;
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SpdyConnectTransaction *QuerySpdyConnectTransaction() override;
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private:
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nsresult StartTimerCallback();
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void Cleanup();
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int32_t FilterOutput(const char *aBuf, int32_t aAmount);
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int32_t FilterInput(char *aBuf, int32_t aAmount);
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static PRStatus GetPeerName(PRFileDesc *fd, PRNetAddr*addr);
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static PRStatus GetSocketOption(PRFileDesc *fd, PRSocketOptionData *data);
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static PRStatus SetSocketOption(PRFileDesc *fd, const PRSocketOptionData *data);
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static int32_t FilterWrite(PRFileDesc *fd, const void *buf, int32_t amount);
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static int32_t FilterRead(PRFileDesc *fd, void *buf, int32_t amount);
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static int32_t FilterSend(PRFileDesc *fd, const void *buf, int32_t amount, int flags,
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PRIntervalTime timeout);
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static int32_t FilterRecv(PRFileDesc *fd, void *buf, int32_t amount, int flags,
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PRIntervalTime timeout);
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static PRStatus FilterClose(PRFileDesc *fd);
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private:
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RefPtr<nsAHttpTransaction> mTransaction;
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nsCOMPtr<nsISupports> mSecInfo;
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nsCOMPtr<nsITimer> mTimer;
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RefPtr<NudgeTunnelCallback> mNudgeCallback;
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// buffered network output, after encryption
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UniquePtr<char[]> mEncryptedText;
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uint32_t mEncryptedTextUsed;
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uint32_t mEncryptedTextSize;
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PRFileDesc *mFD;
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nsAHttpSegmentReader *mSegmentReader;
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nsAHttpSegmentWriter *mSegmentWriter;
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nsresult mFilterReadCode;
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bool mForce;
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bool mReadSegmentBlocked;
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uint32_t mNudgeCounter;
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};
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class SocketTransportShim;
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class InputStreamShim;
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class OutputStreamShim;
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class nsHttpConnection;
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class SpdyConnectTransaction final : public NullHttpTransaction
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{
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public:
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SpdyConnectTransaction(nsHttpConnectionInfo *ci,
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nsIInterfaceRequestor *callbacks,
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uint32_t caps,
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nsHttpTransaction *trans,
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nsAHttpConnection *session);
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~SpdyConnectTransaction();
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SpdyConnectTransaction *QuerySpdyConnectTransaction() override { return this; }
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// A transaction is forced into plaintext when it is intended to be used as a CONNECT
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// tunnel but the setup fails. The plaintext only carries the CONNECT error.
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void ForcePlainText();
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void MapStreamToHttpConnection(nsISocketTransport *aTransport,
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nsHttpConnectionInfo *aConnInfo);
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nsresult ReadSegments(nsAHttpSegmentReader *reader,
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uint32_t count, uint32_t *countRead) override final;
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nsresult WriteSegments(nsAHttpSegmentWriter *writer,
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uint32_t count, uint32_t *countWritten) override final;
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nsHttpRequestHead *RequestHead() override final;
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void Close(nsresult reason) override final;
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// ConnectedReadyForInput() tests whether the spdy connect transaction is attached to
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// an nsHttpConnection that can properly deal with flow control, etc..
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bool ConnectedReadyForInput();
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private:
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friend class InputStreamShim;
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friend class OutputStreamShim;
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nsresult Flush(uint32_t count, uint32_t *countRead);
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void CreateShimError(nsresult code);
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nsCString mConnectString;
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uint32_t mConnectStringOffset;
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nsAHttpConnection *mSession;
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nsAHttpSegmentReader *mSegmentReader;
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UniquePtr<char[]> mInputData;
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uint32_t mInputDataSize;
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uint32_t mInputDataUsed;
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uint32_t mInputDataOffset;
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UniquePtr<char[]> mOutputData;
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uint32_t mOutputDataSize;
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uint32_t mOutputDataUsed;
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uint32_t mOutputDataOffset;
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bool mForcePlainText;
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TimeStamp mTimestampSyn;
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RefPtr<nsHttpConnectionInfo> mConnInfo;
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// mTunneledConn, mTunnelTransport, mTunnelStreamIn, mTunnelStreamOut
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// are the connectors to the "real" http connection. They are created
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// together when the tunnel setup is complete and a static reference is held
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// for the lifetime of the tunnel.
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RefPtr<nsHttpConnection> mTunneledConn;
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RefPtr<SocketTransportShim> mTunnelTransport;
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RefPtr<InputStreamShim> mTunnelStreamIn;
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RefPtr<OutputStreamShim> mTunnelStreamOut;
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RefPtr<nsHttpTransaction> mDrivingTransaction;
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};
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} // namespace net
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} // namespace mozilla
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#endif // mozilla_net_TLSFilterTransaction_h
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