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/*
* Copyright (C) 2001-2012 Jacek Sieka, arnetheduck on gmail point com
* Copyright (C) 2009-2019 EiskaltDC++ developers
* Copyright (C) 2019 Boris Pek <tehnick-8@yandex.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include <deque>
#include <memory>
#include "typedefs.h"
#include "BufferedSocketListener.h"
#include "Semaphore.h"
#include "Thread.h"
#include "Speaker.h"
#include "Socket.h"
#include "Util.h"
#include "Atomic.h"
namespace dcpp {
using std::deque;
using std::function;
using std::pair;
using std::unique_ptr;
class BufferedSocket : public Speaker<BufferedSocketListener>, private Thread {
public:
enum Modes {
MODE_LINE,
MODE_ZPIPE,
MODE_DATA
};
enum NatRoles {
NAT_NONE,
NAT_CLIENT,
NAT_SERVER
};
/**
* BufferedSocket factory, each BufferedSocket may only be used to create one connection
* @param sep Line separator
* @return An unconnected socket
*/
static BufferedSocket* getSocket(char sep) {
return new BufferedSocket(sep);
}
static void putSocket(BufferedSocket* aSock) {
if(aSock) {
aSock->removeListeners();
aSock->shutdown();
}
}
static void waitShutdown() {
while(sockets > 0)
Thread::sleep(100);
}
void accept(const Socket& srv, bool secure, bool allowUntrusted);
void connect(const string& aAddress, const string& aPort, bool secure, bool allowUntrusted, bool proxy, Socket::Protocol proto, const string& expKP = Util::emptyString);
void connect(const string& aAddress, const string& aPort, const string& localPort, NatRoles natRole, bool secure, bool allowUntrusted, bool proxy, Socket::Protocol proto, const string& expKP = Util::emptyString);
/** Sets data mode for aBytes bytes. Must be called within onLine. */
void setDataMode(int64_t aBytes = -1) { mode = MODE_DATA; dataBytes = aBytes; }
/**
* Rollback is an ugly hack to solve problems with compressed transfers where not all data received
* should be treated as data.
* Must be called from within onData.
*/
void setLineMode(size_t aRollback) { setMode (MODE_LINE, aRollback);}
void setMode(Modes mode, size_t aRollback = 0);
Modes getMode() const { return mode; }
const string& getIp() const { return sock->getIp(); }
bool isConnected() const { return sock->isConnected(); }
bool isSecure() const { return sock->isSecure(); }
bool isTrusted() const { return sock->isTrusted(); }
string getCipherName() const { return sock->getCipherName(); }
vector<uint8_t> getKeyprint() const { return sock->getKeyprint(); }
void write(const string& aData) { write(aData.data(), aData.length()); }
void write(const char* aBuf, size_t aLen) noexcept;
/** Send the file f over this socket. */
void transmitFile(InputStream* f) { Lock l(cs); addTask(SEND_FILE, new SendFileInfo(f)); }
/** Send an updated signal to all listeners */
void updated() { Lock l(cs); addTask(UPDATED, 0); }
void disconnect(bool graceless = false) noexcept { Lock l(cs); if(graceless) disconnecting = true; addTask(DISCONNECT, 0); }
string getLocalIp() const { return sock->getLocalIp(); }
string getLocalPort() const { return sock->getLocalPort(); }
GETSET(char, separator, Separator)
private:
enum Tasks {
CONNECT,
DISCONNECT,
SEND_DATA,
SEND_FILE,
SHUTDOWN,
ACCEPTED,
UPDATED
};
enum State {
STARTING, // Waiting for CONNECT/ACCEPTED/SHUTDOWN
RUNNING,
FAILED
};
struct TaskData {
virtual ~TaskData() { }
};
struct ConnectInfo : public TaskData {
ConnectInfo(const string& addr_,
const string& port_,
const string& localPort_,
const NatRoles natRole_,
const bool proxy_) :
addr(addr_),
port(port_),
localPort(localPort_),
natRole(natRole_),
proxy(proxy_)
{ }
string addr;
string port;
string localPort;
NatRoles natRole;
bool proxy;
};
struct SendFileInfo : public TaskData {
SendFileInfo(InputStream* stream_) : stream(stream_) { }
InputStream* stream;
};
BufferedSocket(char aSeparator);
virtual ~BufferedSocket();
CriticalSection cs;
Semaphore taskSem;
deque<pair<Tasks, unique_ptr<TaskData> > > tasks;
Modes mode;
unique_ptr<UnZFilter> filterIn;
int64_t dataBytes;
size_t rollback;
string line;
ByteVector inbuf;
ByteVector writeBuf;
ByteVector sendBuf;
unique_ptr<Socket> sock;
State state;
bool disconnecting;
virtual int run();
void threadConnect(const string& aAddr, const string& aPort, const string& localPort, NatRoles natRole, bool proxy);
void threadAccept();
void threadRead();
void threadSendFile(InputStream* is);
void threadSendData();
void fail(const string& aError);
static Atomic<long,memory_ordering_strong> sockets;
bool checkEvents();
void checkSocket();
void setSocket(unique_ptr<Socket> s);
void shutdown();
void addTask(Tasks task, TaskData* data);
};
} // namespace dcpp
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