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#ifndef CRYPTOPP_SOCKETFT_H
#define CRYPTOPP_SOCKETFT_H
#include "config.h"
#if !defined(NO_OS_DEPENDENCE) && defined(SOCKETS_AVAILABLE)
#include "cryptlib.h"
#include "network.h"
#include "queue.h"
#ifdef USE_WINDOWS_STYLE_SOCKETS
# if defined(_WINSOCKAPI_) && !defined(_WINSOCK2API_)
# error Winsock 1 is not supported by this library. Please include this file or winsock2.h before windows.h.
# endif
#include <winsock2.h>
#include <ws2tcpip.h>
#include "winpipes.h"
#else
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#endif
NAMESPACE_BEGIN(CryptoPP)
#ifdef USE_WINDOWS_STYLE_SOCKETS
typedef ::SOCKET socket_t;
#else
typedef int socket_t;
const socket_t INVALID_SOCKET = -1;
// cygwin 1.1.4 doesn't have SHUT_RD
const int SD_RECEIVE = 0;
const int SD_SEND = 1;
const int SD_BOTH = 2;
const int SOCKET_ERROR = -1;
#endif
#ifndef socklen_t
typedef TYPE_OF_SOCKLEN_T socklen_t; // see config.h
#endif
/// wrapper for Windows or Berkeley Sockets
class Socket
{
public:
/// exception thrown by Socket class
class Err : public OS_Error
{
public:
Err(socket_t s, const std::string& operation, int error);
socket_t GetSocket() const {return m_s;}
private:
socket_t m_s;
};
Socket(socket_t s = INVALID_SOCKET, bool own=false) : m_s(s), m_own(own) {}
Socket(const Socket &s) : m_s(s.m_s), m_own(false) {}
virtual ~Socket();
bool GetOwnership() const {return m_own;}
void SetOwnership(bool own) {m_own = own;}
operator socket_t() {return m_s;}
socket_t GetSocket() const {return m_s;}
void AttachSocket(socket_t s, bool own=false);
socket_t DetachSocket();
void CloseSocket();
void Create(int nType = SOCK_STREAM);
void Bind(unsigned int port, const char *addr=NULLPTR);
void Bind(const sockaddr* psa, socklen_t saLen);
void Listen(int backlog = SOMAXCONN);
// the next three functions return false if the socket is in nonblocking mode
// and the operation cannot be completed immediately
bool Connect(const char *addr, unsigned int port);
bool Connect(const sockaddr* psa, socklen_t saLen);
bool Accept(Socket& s, sockaddr *psa=NULLPTR, socklen_t *psaLen=NULLPTR);
void GetSockName(sockaddr *psa, socklen_t *psaLen);
void GetPeerName(sockaddr *psa, socklen_t *psaLen);
unsigned int Send(const byte* buf, size_t bufLen, int flags=0);
unsigned int Receive(byte* buf, size_t bufLen, int flags=0);
void ShutDown(int how = SD_SEND);
void IOCtl(long cmd, unsigned long *argp);
bool SendReady(const timeval *timeout);
bool ReceiveReady(const timeval *timeout);
virtual void HandleError(const char *operation) const;
void CheckAndHandleError_int(const char *operation, int result) const
{if (result == SOCKET_ERROR) HandleError(operation);}
void CheckAndHandleError(const char *operation, socket_t result) const
{if (result == static_cast<socket_t>(SOCKET_ERROR)) HandleError(operation);}
#ifdef USE_WINDOWS_STYLE_SOCKETS
void CheckAndHandleError(const char *operation, BOOL result) const
{if (!result) HandleError(operation);}
void CheckAndHandleError(const char *operation, bool result) const
{if (!result) HandleError(operation);}
#endif
/// look up the port number given its name, returns 0 if not found
static unsigned int PortNameToNumber(const char *name, const char *protocol="tcp");
/// start Windows Sockets 2
static void StartSockets();
/// calls WSACleanup for Windows Sockets
static void ShutdownSockets();
/// returns errno or WSAGetLastError
static int GetLastError();
/// sets errno or calls WSASetLastError
static void SetLastError(int errorCode);
protected:
virtual void SocketChanged() {}
socket_t m_s;
bool m_own;
};
class SocketsInitializer
{
public:
SocketsInitializer() {Socket::StartSockets();}
~SocketsInitializer() {try {Socket::ShutdownSockets();} catch (const Exception&) {CRYPTOPP_ASSERT(0);}}
};
class SocketReceiver : public NetworkReceiver
{
public:
SocketReceiver(Socket &s);
#ifdef USE_BERKELEY_STYLE_SOCKETS
bool MustWaitToReceive() {return true;}
#else
~SocketReceiver();
bool MustWaitForResult() {return true;}
#endif
bool Receive(byte* buf, size_t bufLen);
unsigned int GetReceiveResult();
bool EofReceived() const {return m_eofReceived;}
unsigned int GetMaxWaitObjectCount() const {return 1;}
void GetWaitObjects(WaitObjectContainer &container, CallStack const& callStack);
private:
Socket &m_s;
#ifdef USE_WINDOWS_STYLE_SOCKETS
WindowsHandle m_event;
OVERLAPPED m_overlapped;
DWORD m_lastResult;
bool m_resultPending;
#else
unsigned int m_lastResult;
#endif
bool m_eofReceived;
};
class SocketSender : public NetworkSender
{
public:
SocketSender(Socket &s);
#ifdef USE_BERKELEY_STYLE_SOCKETS
bool MustWaitToSend() {return true;}
#else
~SocketSender();
bool MustWaitForResult() {return true;}
bool MustWaitForEof() { return true; }
bool EofSent();
#endif
void Send(const byte* buf, size_t bufLen);
unsigned int GetSendResult();
void SendEof();
unsigned int GetMaxWaitObjectCount() const {return 1;}
void GetWaitObjects(WaitObjectContainer &container, CallStack const& callStack);
private:
Socket &m_s;
#ifdef USE_WINDOWS_STYLE_SOCKETS
WindowsHandle m_event;
OVERLAPPED m_overlapped;
DWORD m_lastResult;
bool m_resultPending;
#else
unsigned int m_lastResult;
#endif
};
/// socket-based implementation of NetworkSource
class SocketSource : public NetworkSource, public Socket
{
public:
SocketSource(socket_t s = INVALID_SOCKET, bool pumpAll = false, BufferedTransformation *attachment = NULLPTR)
: NetworkSource(attachment), Socket(s), m_receiver(*this)
{
if (pumpAll)
PumpAll();
}
private:
NetworkReceiver & AccessReceiver() {return m_receiver;}
SocketReceiver m_receiver;
};
/// socket-based implementation of NetworkSink
class SocketSink : public NetworkSink, public Socket
{
public:
SocketSink(socket_t s=INVALID_SOCKET, unsigned int maxBufferSize=0, unsigned int autoFlushBound=16*1024)
: NetworkSink(maxBufferSize, autoFlushBound), Socket(s), m_sender(*this) {}
void SendEof() {ShutDown(SD_SEND);}
private:
NetworkSender & AccessSender() {return m_sender;}
SocketSender m_sender;
};
NAMESPACE_END
#endif // SOCKETS_AVAILABLE
#endif // CRYPTOPP_SOCKETFT_H
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