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|
// **********************************************************************
//
// Copyright (c) 2003-2007 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#include <IceSSL/TransceiverI.h>
#include <IceSSL/Instance.h>
#include <IceSSL/Util.h>
#include <Ice/Communicator.h>
#include <Ice/LoggerUtil.h>
#include <Ice/Stats.h>
#include <Ice/Buffer.h>
#include <Ice/Network.h>
#include <Ice/LocalException.h>
#include <openssl/err.h>
using namespace std;
using namespace Ice;
using namespace IceSSL;
SOCKET
IceSSL::TransceiverI::fd()
{
assert(_fd != INVALID_SOCKET);
return _fd;
}
void
IceSSL::TransceiverI::close()
{
if(_instance->networkTraceLevel() >= 1)
{
Trace out(_logger, _instance->networkTraceCategory());
out << "closing ssl connection\n" << toString();
}
shutdown();
//
// Only one thread calls close(), so synchronization is not necessary here.
//
SSL_free(_ssl);
_ssl = 0;
assert(_fd != INVALID_SOCKET);
_fd = INVALID_SOCKET;
}
void
IceSSL::TransceiverI::shutdownWrite()
{
if(_instance->networkTraceLevel() >= 2)
{
Trace out(_logger, _instance->networkTraceCategory());
out << "shutting down ssl connection for writing\n" << toString();
}
shutdown();
assert(_fd != INVALID_SOCKET);
IceInternal::shutdownSocketWrite(_fd);
}
void
IceSSL::TransceiverI::shutdownReadWrite()
{
if(_instance->networkTraceLevel() >= 2)
{
Trace out(_logger, _instance->networkTraceCategory());
out << "shutting down ssl connection for reading and writing\n" << toString();
}
shutdown();
assert(_fd != INVALID_SOCKET);
IceInternal::shutdownSocketReadWrite(_fd);
}
void
IceSSL::TransceiverI::write(IceInternal::Buffer& buf, int timeout)
{
// Its impossible for the packetSize to be more than an Int.
int packetSize = static_cast<int>(buf.b.end() - buf.i);
#ifdef _WIN32
//
// Limit packet size to avoid performance problems on WIN32
//
if(packetSize > _maxPacketSize)
{
packetSize = _maxPacketSize;
}
#endif
while(buf.i != buf.b.end())
{
ERR_clear_error(); // Clear any spurious errors.
assert(_fd != INVALID_SOCKET);
int ret, err;
bool wantRead, wantWrite;
{
IceUtil::Mutex::Lock sync(_sslMutex);
ret = SSL_write(_ssl, reinterpret_cast<const void*>(&*buf.i), packetSize);
err = SSL_get_error(_ssl, ret);
wantRead = SSL_want_read(_ssl);
wantWrite = SSL_want_write(_ssl);
}
if(ret <= 0)
{
switch(err)
{
case SSL_ERROR_NONE:
assert(false);
break;
case SSL_ERROR_ZERO_RETURN:
{
ConnectionLostException ex(__FILE__, __LINE__);
ex.error = IceInternal::getSocketErrno();
throw ex;
}
case SSL_ERROR_WANT_READ:
{
if(!selectRead(_fd, timeout))
{
throw TimeoutException(__FILE__, __LINE__);
}
continue;
}
case SSL_ERROR_WANT_WRITE:
{
if(!selectWrite(_fd, timeout))
{
throw TimeoutException(__FILE__, __LINE__);
}
continue;
}
case SSL_ERROR_SYSCALL:
{
if(ret == -1)
{
if(IceInternal::interrupted())
{
continue;
}
if(IceInternal::noBuffers() && packetSize > 1024)
{
packetSize /= 2;
continue;
}
if(IceInternal::wouldBlock())
{
if(wantRead)
{
if(!selectRead(_fd, timeout))
{
throw TimeoutException(__FILE__, __LINE__);
}
}
else if(wantWrite)
{
if(!selectWrite(_fd, timeout))
{
throw TimeoutException(__FILE__, __LINE__);
}
}
continue;
}
if(IceInternal::connectionLost())
{
ConnectionLostException ex(__FILE__, __LINE__);
ex.error = IceInternal::getSocketErrno();
throw ex;
}
}
if(ret == 0)
{
ConnectionLostException ex(__FILE__, __LINE__);
ex.error = 0;
throw ex;
}
SocketException ex(__FILE__, __LINE__);
ex.error = IceInternal::getSocketErrno();
throw ex;
}
case SSL_ERROR_SSL:
{
ProtocolException ex(__FILE__, __LINE__);
ex.reason = "SSL protocol error during write:\n" + _instance->sslErrors();
throw ex;
}
}
}
if(_instance->networkTraceLevel() >= 3)
{
Trace out(_logger, _instance->networkTraceCategory());
out << "sent " << ret << " of " << packetSize << " bytes via ssl\n" << toString();
}
if(_stats)
{
_stats->bytesSent(type(), static_cast<Int>(ret));
}
buf.i += ret;
if(packetSize > buf.b.end() - buf.i)
{
packetSize = static_cast<int>(buf.b.end() - buf.i);
}
}
}
void
IceSSL::TransceiverI::read(IceInternal::Buffer& buf, int timeout)
{
// It's impossible for the packetSize to be more than an Int.
int packetSize = static_cast<int>(buf.b.end() - buf.i);
while(buf.i != buf.b.end())
{
ERR_clear_error(); // Clear any spurious errors.
assert(_fd != INVALID_SOCKET);
int ret, err;
bool wantRead, wantWrite;
{
IceUtil::Mutex::Lock sync(_sslMutex);
ret = SSL_read(_ssl, reinterpret_cast<void*>(&*buf.i), packetSize);
err = SSL_get_error(_ssl, ret);
wantRead = SSL_want_read(_ssl);
wantWrite = SSL_want_write(_ssl);
}
if(ret <= 0)
{
switch(err)
{
case SSL_ERROR_NONE:
assert(false);
break;
case SSL_ERROR_ZERO_RETURN:
{
//
// If the connection is lost when reading data, we shut
// down the write end of the socket. This helps to unblock
// threads that are stuck in send() or select() while
// sending data. Note: I don't really understand why
// send() or select() sometimes don't detect a connection
// loss. Therefore this helper to make them detect it.
//
//assert(_fd != INVALID_SOCKET);
//shutdownSocketReadWrite(_fd);
ConnectionLostException ex(__FILE__, __LINE__);
ex.error = 0;
throw ex;
}
case SSL_ERROR_WANT_READ:
{
if(!selectRead(_fd, timeout))
{
throw TimeoutException(__FILE__, __LINE__);
}
continue;
}
case SSL_ERROR_WANT_WRITE:
{
if(!selectWrite(_fd, timeout))
{
throw TimeoutException(__FILE__, __LINE__);
}
continue;
}
case SSL_ERROR_SYSCALL:
{
if(ret == -1)
{
if(IceInternal::interrupted())
{
continue;
}
if(IceInternal::noBuffers() && packetSize > 1024)
{
packetSize /= 2;
continue;
}
if(IceInternal::wouldBlock())
{
if(wantRead)
{
if(!selectRead(_fd, timeout))
{
throw TimeoutException(__FILE__, __LINE__);
}
}
else if(wantWrite)
{
if(!selectWrite(_fd, timeout))
{
throw TimeoutException(__FILE__, __LINE__);
}
}
continue;
}
if(IceInternal::connectionLost())
{
//
// See the commment above about shutting down the
// socket if the connection is lost while reading
// data.
//
//assert(_fd != INVALID_SOCKET);
//shutdownSocketReadWrite(_fd);
ConnectionLostException ex(__FILE__, __LINE__);
ex.error = IceInternal::getSocketErrno();
throw ex;
}
}
if(ret == 0)
{
ConnectionLostException ex(__FILE__, __LINE__);
ex.error = 0;
throw ex;
}
SocketException ex(__FILE__, __LINE__);
ex.error = IceInternal::getSocketErrno();
throw ex;
}
case SSL_ERROR_SSL:
{
//
// Forcefully closing a connection can result in SSL_read reporting
// "decryption failed or bad record mac". We trap that error and
// treat it as the loss of a connection.
//
// NOTE: We have to compare the reason string instead
// of the error codes because the error code values
// changed between OpenSSL 0.9.7i and 0.9.7j and
// between OpenSSL 0.9.8a and 0.9.8b...
//
//unsigned long e = ERR_peek_error();
//if(ERR_GET_LIB(e) == ERR_LIB_SSL && ERR_GET_REASON(e) == SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC)
//
unsigned long e = ERR_peek_error();
if(ERR_GET_LIB(e) == ERR_LIB_SSL &&
strcmp(ERR_reason_error_string(e), "decryption failed or bad record mac") == 0)
{
ConnectionLostException ex(__FILE__, __LINE__);
ex.error = 0;
throw ex;
}
else
{
ProtocolException ex(__FILE__, __LINE__);
ex.reason = "SSL protocol error during read:\n" + _instance->sslErrors();
throw ex;
}
}
}
}
if(_instance->networkTraceLevel() >= 3)
{
Trace out(_logger, _instance->networkTraceCategory());
out << "received " << ret << " of " << packetSize << " bytes via ssl\n" << toString();
}
if(_stats)
{
_stats->bytesReceived(type(), static_cast<Int>(ret));
}
buf.i += ret;
if(packetSize > buf.b.end() - buf.i)
{
packetSize = static_cast<int>(buf.b.end() - buf.i);
}
}
}
string
IceSSL::TransceiverI::type() const
{
return "ssl";
}
string
IceSSL::TransceiverI::toString() const
{
return _desc;
}
void
IceSSL::TransceiverI::initialize(int timeout)
{
if(_incoming)
{
// TODO: The timeout is 0 when called by the thread pool.
// Make this configurable?
if(timeout == 0)
{
timeout = -1;
}
do
{
//
// Only one thread calls initialize(), so synchronization is not necessary here.
//
int ret = SSL_accept(_ssl);
switch(SSL_get_error(_ssl, ret))
{
case SSL_ERROR_NONE:
assert(SSL_is_init_finished(_ssl));
break;
case SSL_ERROR_ZERO_RETURN:
{
ConnectionLostException ex(__FILE__, __LINE__);
ex.error = IceInternal::getSocketErrno();
throw ex;
}
case SSL_ERROR_WANT_READ:
{
if(!selectRead(_fd, timeout))
{
throw ConnectTimeoutException(__FILE__, __LINE__);
}
break;
}
case SSL_ERROR_WANT_WRITE:
{
if(!selectWrite(_fd, timeout))
{
throw ConnectTimeoutException(__FILE__, __LINE__);
}
break;
}
case SSL_ERROR_SYSCALL:
{
if(ret == -1)
{
if(IceInternal::interrupted())
{
break;
}
if(IceInternal::wouldBlock())
{
if(SSL_want_read(_ssl))
{
if(!selectRead(_fd, timeout))
{
throw ConnectTimeoutException(__FILE__, __LINE__);
}
}
else if(SSL_want_write(_ssl))
{
if(!selectWrite(_fd, timeout))
{
throw ConnectTimeoutException(__FILE__, __LINE__);
}
}
break;
}
if(IceInternal::connectionLost())
{
ConnectionLostException ex(__FILE__, __LINE__);
ex.error = IceInternal::getSocketErrno();
throw ex;
}
}
if(ret == 0)
{
ConnectionLostException ex(__FILE__, __LINE__);
ex.error = 0;
throw ex;
}
SocketException ex(__FILE__, __LINE__);
ex.error = IceInternal::getSocketErrno();
throw ex;
}
case SSL_ERROR_SSL:
{
struct sockaddr_in remoteAddr;
string desc;
if(IceInternal::fdToRemoteAddress(_fd, remoteAddr))
{
desc = IceInternal::addrToString(remoteAddr);
}
ProtocolException ex(__FILE__, __LINE__);
ex.reason = "SSL error occurred for new incoming connection:\nremote address = " + desc + "\n" +
_instance->sslErrors();
throw ex;
}
}
}
while(!SSL_is_init_finished(_ssl));
_instance->verifyPeer(_ssl, _fd, "", _adapterName, true);
if(_instance->networkTraceLevel() >= 1)
{
Trace out(_logger, _instance->networkTraceCategory());
out << "accepted ssl connection\n" << IceInternal::fdToString(_fd);
}
if(_instance->securityTraceLevel() >= 1)
{
_instance->traceConnection(_ssl, true);
}
}
}
void
IceSSL::TransceiverI::checkSendSize(const IceInternal::Buffer& buf, size_t messageSizeMax)
{
if(buf.b.size() > messageSizeMax)
{
throw MemoryLimitException(__FILE__, __LINE__);
}
}
ConnectionInfo
IceSSL::TransceiverI::getConnectionInfo() const
{
//
// This can only be called on an open transceiver.
//
assert(_fd != INVALID_SOCKET);
return populateConnectionInfo(_ssl, _fd, _adapterName, _incoming);
}
IceSSL::TransceiverI::TransceiverI(const InstancePtr& instance, SSL* ssl, SOCKET fd,
bool incoming, const string& adapterName) :
_instance(instance),
_logger(instance->communicator()->getLogger()),
_stats(instance->communicator()->getStats()),
_ssl(ssl),
_fd(fd),
_adapterName(adapterName),
_incoming(incoming),
_desc(IceInternal::fdToString(fd))
{
#ifdef _WIN32
//
// On Windows, limiting the buffer size is important to prevent
// poor throughput performances when transfering large amount of
// data. See Microsoft KB article KB823764.
//
_maxPacketSize = IceInternal::getSendBufferSize(_fd) / 2;
if(_maxPacketSize < 512)
{
_maxPacketSize = 0;
}
#endif
}
IceSSL::TransceiverI::~TransceiverI()
{
assert(_fd == INVALID_SOCKET);
}
void
IceSSL::TransceiverI::shutdown()
{
IceUtil::Mutex::Lock sync(_sslMutex);
int err = SSL_shutdown(_ssl);
//
// Call it one more time if it returned 0.
//
if(err == 0)
{
SSL_shutdown(_ssl);
}
}
|
