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