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#ifndef _sys_ssl_SslIO
#define _sys_ssl_SslIO
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "qpid/sys/DispatchHandle.h"
#include "qpid/sys/SecuritySettings.h"
#include <boost/function.hpp>
#include <boost/shared_array.hpp>
#include <deque>
namespace qpid {
namespace sys {
class Socket;
namespace ssl {
class SslSocket;
/*
* Asynchronous ssl acceptor: accepts connections then does a callback
* with the accepted fd
*/
template <class T>
class SslAcceptorTmpl {
public:
typedef boost::function1<void, const Socket&> Callback;
private:
Callback acceptedCallback;
qpid::sys::DispatchHandle handle;
const T& socket;
public:
SslAcceptorTmpl(const T& s, Callback callback);
~SslAcceptorTmpl();
void start(qpid::sys::Poller::shared_ptr poller);
private:
void readable(qpid::sys::DispatchHandle& handle);
};
/*
* Asynchronous ssl connector: starts the process of initiating a
* connection and invokes a callback when completed or failed.
*/
class SslConnector : private qpid::sys::DispatchHandle {
public:
typedef boost::function1<void, const SslSocket&> ConnectedCallback;
typedef boost::function2<void, int, std::string> FailedCallback;
private:
ConnectedCallback connCallback;
FailedCallback failCallback;
const SslSocket& socket;
public:
SslConnector(const SslSocket& socket,
Poller::shared_ptr poller,
std::string hostname,
std::string port,
ConnectedCallback connCb,
FailedCallback failCb = 0);
private:
void connComplete(DispatchHandle& handle);
void failure(int, std::string);
};
struct SslIOBufferBase {
char* bytes;
int32_t byteCount;
int32_t dataStart;
int32_t dataCount;
SslIOBufferBase(char* const b, const int32_t s) :
bytes(b),
byteCount(s),
dataStart(0),
dataCount(0)
{}
virtual ~SslIOBufferBase()
{}
};
/*
* Asychronous reader/writer:
* Reader accepts buffers to read into; reads into the provided buffers
* and then does a callback with the buffer and amount read. Optionally it can callback
* when there is something to read but no buffer to read it into.
*
* Writer accepts a buffer and queues it for writing; can also be given
* a callback for when writing is "idle" (ie fd is writable, but nothing to write)
*
* The class is implemented in terms of DispatchHandle to allow it to be deleted by deleting
* the contained DispatchHandle
*/
class SslIO : private qpid::sys::DispatchHandle {
public:
typedef SslIOBufferBase BufferBase;
typedef boost::function2<void, SslIO&, BufferBase*> ReadCallback;
typedef boost::function1<void, SslIO&> EofCallback;
typedef boost::function1<void, SslIO&> DisconnectCallback;
typedef boost::function2<void, SslIO&, const SslSocket&> ClosedCallback;
typedef boost::function1<void, SslIO&> BuffersEmptyCallback;
typedef boost::function1<void, SslIO&> IdleCallback;
typedef boost::function1<void, SslIO&> RequestCallback;
SslIO(const SslSocket& s,
ReadCallback rCb, EofCallback eofCb, DisconnectCallback disCb,
ClosedCallback cCb = 0, BuffersEmptyCallback eCb = 0, IdleCallback iCb = 0);
private:
ReadCallback readCallback;
EofCallback eofCallback;
DisconnectCallback disCallback;
ClosedCallback closedCallback;
BuffersEmptyCallback emptyCallback;
IdleCallback idleCallback;
const SslSocket& socket;
std::deque<BufferBase*> bufferQueue;
std::deque<BufferBase*> writeQueue;
std::vector<BufferBase> buffers;
boost::shared_array<char> bufferMemory;
bool queuedClose;
/**
* This flag is used to detect and handle concurrency between
* calls to notifyPendingWrite() (which can be made from any thread) and
* the execution of the writeable() method (which is always on the
* thread processing this handle.
*/
volatile bool writePending;
public:
/*
* Size of IO buffers - this is the maximum possible frame size + 1
*/
const static uint32_t MaxBufferSize = 65536;
/*
* Number of IO buffers allocated - I think the code can only use 2 -
* 1 for reading and 1 for writing, allocate 4 for safety
*/
const static uint32_t BufferCount = 4;
void queueForDeletion();
void start(qpid::sys::Poller::shared_ptr poller);
void createBuffers(uint32_t size = MaxBufferSize);
void queueReadBuffer(BufferBase* buff);
void unread(BufferBase* buff);
void queueWrite(BufferBase* buff);
void notifyPendingWrite();
void queueWriteClose();
bool writeQueueEmpty() { return writeQueue.empty(); }
void requestCallback(RequestCallback);
BufferBase* getQueuedBuffer();
qpid::sys::SecuritySettings getSecuritySettings();
private:
~SslIO();
void readable(qpid::sys::DispatchHandle& handle);
void writeable(qpid::sys::DispatchHandle& handle);
void disconnected(qpid::sys::DispatchHandle& handle);
void requestedCall(RequestCallback);
void close(qpid::sys::DispatchHandle& handle);
};
}}}
#endif // _sys_ssl_SslIO
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