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435 lines
14 KiB
C++
435 lines
14 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/socket.h
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// Purpose: Socket handling classes
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// Authors: Guilhem Lavaux, Guillermo Rodriguez Garcia
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// Modified by:
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// Created: April 1997
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// Copyright: (c) Guilhem Lavaux
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_SOCKET_H_
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#define _WX_SOCKET_H_
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#include "wx/defs.h"
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#if wxUSE_SOCKETS
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// ---------------------------------------------------------------------------
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// wxSocket headers
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// ---------------------------------------------------------------------------
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#include "wx/event.h"
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#include "wx/sckaddr.h"
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#include "wx/list.h"
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class wxSocketImpl;
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// ------------------------------------------------------------------------
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// Types and constants
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// ------------------------------------------------------------------------
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// Define the type of native sockets.
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#if defined(__WINDOWS__)
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// Although socket descriptors are still 32 bit values, even under Win64,
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// the socket type is 64 bit there.
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typedef wxUIntPtr wxSOCKET_T;
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#else
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typedef int wxSOCKET_T;
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#endif
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// Types of different socket notifications or events.
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//
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// NB: the values here should be consecutive and start with 0 as they are
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// used to construct the wxSOCKET_XXX_FLAG bit mask values below
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enum wxSocketNotify
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{
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wxSOCKET_INPUT,
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wxSOCKET_OUTPUT,
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wxSOCKET_CONNECTION,
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wxSOCKET_LOST
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};
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enum
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{
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wxSOCKET_INPUT_FLAG = 1 << wxSOCKET_INPUT,
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wxSOCKET_OUTPUT_FLAG = 1 << wxSOCKET_OUTPUT,
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wxSOCKET_CONNECTION_FLAG = 1 << wxSOCKET_CONNECTION,
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wxSOCKET_LOST_FLAG = 1 << wxSOCKET_LOST
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};
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// this is a combination of the bit masks defined above
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typedef int wxSocketEventFlags;
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enum wxSocketError
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{
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wxSOCKET_NOERROR = 0,
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wxSOCKET_INVOP,
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wxSOCKET_IOERR,
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wxSOCKET_INVADDR,
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wxSOCKET_INVSOCK,
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wxSOCKET_NOHOST,
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wxSOCKET_INVPORT,
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wxSOCKET_WOULDBLOCK,
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wxSOCKET_TIMEDOUT,
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wxSOCKET_MEMERR,
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wxSOCKET_OPTERR
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};
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// socket options/flags bit masks
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enum
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{
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wxSOCKET_NONE = 0x0000,
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wxSOCKET_NOWAIT_READ = 0x0001,
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wxSOCKET_NOWAIT_WRITE = 0x0002,
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wxSOCKET_NOWAIT = wxSOCKET_NOWAIT_READ | wxSOCKET_NOWAIT_WRITE,
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wxSOCKET_WAITALL_READ = 0x0004,
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wxSOCKET_WAITALL_WRITE = 0x0008,
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wxSOCKET_WAITALL = wxSOCKET_WAITALL_READ | wxSOCKET_WAITALL_WRITE,
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wxSOCKET_BLOCK = 0x0010,
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wxSOCKET_REUSEADDR = 0x0020,
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wxSOCKET_BROADCAST = 0x0040,
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wxSOCKET_NOBIND = 0x0080
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};
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typedef int wxSocketFlags;
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// socket kind values (badly defined, don't use)
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enum wxSocketType
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{
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wxSOCKET_UNINIT,
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wxSOCKET_CLIENT,
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wxSOCKET_SERVER,
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wxSOCKET_BASE,
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wxSOCKET_DATAGRAM
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};
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// event
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class WXDLLIMPEXP_FWD_NET wxSocketEvent;
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wxDECLARE_EXPORTED_EVENT(WXDLLIMPEXP_NET, wxEVT_SOCKET, wxSocketEvent);
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// --------------------------------------------------------------------------
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// wxSocketBase
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// --------------------------------------------------------------------------
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class WXDLLIMPEXP_NET wxSocketBase : public wxObject
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{
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public:
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// Public interface
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// ----------------
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// ctors and dtors
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wxSocketBase();
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wxSocketBase(wxSocketFlags flags, wxSocketType type);
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virtual ~wxSocketBase();
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void Init();
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bool Destroy();
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// state
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bool Ok() const { return IsOk(); }
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bool IsOk() const { return m_impl != NULL; }
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bool Error() const { return LastError() != wxSOCKET_NOERROR; }
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bool IsClosed() const { return m_closed; }
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bool IsConnected() const { return m_connected; }
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bool IsData() { return WaitForRead(0, 0); }
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bool IsDisconnected() const { return !IsConnected(); }
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wxUint32 LastCount() const { return m_lcount; }
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wxUint32 LastReadCount() const { return m_lcount_read; }
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wxUint32 LastWriteCount() const { return m_lcount_write; }
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wxSocketError LastError() const;
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void SaveState();
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void RestoreState();
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// addresses
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virtual bool GetLocal(wxSockAddress& addr_man) const;
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virtual bool GetPeer(wxSockAddress& addr_man) const;
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virtual bool SetLocal(const wxIPV4address& local);
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// base IO
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virtual bool Close();
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void ShutdownOutput();
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wxSocketBase& Discard();
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wxSocketBase& Peek(void* buffer, wxUint32 nbytes);
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wxSocketBase& Read(void* buffer, wxUint32 nbytes);
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wxSocketBase& ReadMsg(void *buffer, wxUint32 nbytes);
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wxSocketBase& Unread(const void *buffer, wxUint32 nbytes);
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wxSocketBase& Write(const void *buffer, wxUint32 nbytes);
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wxSocketBase& WriteMsg(const void *buffer, wxUint32 nbytes);
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// all Wait() functions wait until their condition is satisfied or the
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// timeout expires; if seconds == -1 (default) then m_timeout value is used
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//
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// it is also possible to call InterruptWait() to cancel any current Wait()
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// wait for anything at all to happen with this socket
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bool Wait(long seconds = -1, long milliseconds = 0);
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// wait until we can read from or write to the socket without blocking
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// (notice that this does not mean that the operation will succeed but only
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// that it will return immediately)
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bool WaitForRead(long seconds = -1, long milliseconds = 0);
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bool WaitForWrite(long seconds = -1, long milliseconds = 0);
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// wait until the connection is terminated
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bool WaitForLost(long seconds = -1, long milliseconds = 0);
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void InterruptWait() { m_interrupt = true; }
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wxSocketFlags GetFlags() const { return m_flags; }
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void SetFlags(wxSocketFlags flags);
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virtual void SetTimeout(long seconds);
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long GetTimeout() const { return m_timeout; }
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bool GetOption(int level, int optname, void *optval, int *optlen);
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bool SetOption(int level, int optname, const void *optval, int optlen);
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wxUint32 GetLastIOSize() const { return m_lcount; }
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wxUint32 GetLastIOReadSize() const { return m_lcount_read; }
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wxUint32 GetLastIOWriteSize() const { return m_lcount_write; }
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// event handling
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void *GetClientData() const { return m_clientData; }
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void SetClientData(void *data) { m_clientData = data; }
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void SetEventHandler(wxEvtHandler& handler, int id = wxID_ANY);
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void SetNotify(wxSocketEventFlags flags);
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void Notify(bool notify);
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// Get the underlying socket descriptor.
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wxSOCKET_T GetSocket() const;
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// initialize/shutdown the sockets (done automatically so there is no need
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// to call these functions usually)
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//
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// should always be called from the main thread only so one of the cases
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// where they should indeed be called explicitly is when the first wxSocket
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// object in the application is created in a different thread
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static bool Initialize();
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static void Shutdown();
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// check if wxSocket had been already initialized
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//
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// notice that this function should be only called from the main thread as
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// otherwise it is inherently unsafe because Initialize/Shutdown() may be
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// called concurrently with it in the main thread
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static bool IsInitialized();
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// Implementation from now on
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// --------------------------
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// do not use, should be private (called from wxSocketImpl only)
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void OnRequest(wxSocketNotify notify);
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// do not use, not documented nor supported
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bool IsNoWait() const { return ((m_flags & wxSOCKET_NOWAIT) != 0); }
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wxSocketType GetType() const { return m_type; }
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private:
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friend class wxSocketClient;
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friend class wxSocketServer;
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friend class wxDatagramSocket;
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// low level IO
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wxUint32 DoRead(void* buffer, wxUint32 nbytes);
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wxUint32 DoWrite(const void *buffer, wxUint32 nbytes);
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// wait until the given flags are set for this socket or the given timeout
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// (or m_timeout) expires
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//
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// notice that wxSOCKET_LOST_FLAG is always taken into account and the
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// function returns -1 if the connection was lost; otherwise it returns
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// true if any of the events specified by flags argument happened or false
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// if the timeout expired
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int DoWait(long timeout, wxSocketEventFlags flags);
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// a helper calling DoWait() using the same convention as the public
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// WaitForXXX() functions use, i.e. use our timeout if seconds == -1 or the
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// specified timeout otherwise
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int DoWait(long seconds, long milliseconds, wxSocketEventFlags flags);
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// another helper calling DoWait() using our m_timeout
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int DoWaitWithTimeout(wxSocketEventFlags flags)
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{
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return DoWait(m_timeout*1000, flags);
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}
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// pushback buffer
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void Pushback(const void *buffer, wxUint32 size);
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wxUint32 GetPushback(void *buffer, wxUint32 size, bool peek);
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// store the given error as the LastError()
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void SetError(wxSocketError error);
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private:
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// socket
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wxSocketImpl *m_impl; // port-specific implementation
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wxSocketType m_type; // wxSocket type
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// state
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wxSocketFlags m_flags; // wxSocket flags
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bool m_connected; // connected?
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bool m_establishing; // establishing connection?
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bool m_reading; // busy reading?
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bool m_writing; // busy writing?
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bool m_closed; // was the other end closed?
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wxUint32 m_lcount; // last IO transaction size
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wxUint32 m_lcount_read; // last IO transaction size of Read() direction.
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wxUint32 m_lcount_write; // last IO transaction size of Write() direction.
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unsigned long m_timeout; // IO timeout value in seconds
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// (TODO: remove, wxSocketImpl has it too)
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wxList m_states; // stack of states (TODO: remove!)
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bool m_interrupt; // interrupt ongoing wait operations?
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bool m_beingDeleted; // marked for delayed deletion?
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wxIPV4address m_localAddress; // bind to local address?
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// pushback buffer
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void *m_unread; // pushback buffer
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wxUint32 m_unrd_size; // pushback buffer size
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wxUint32 m_unrd_cur; // pushback pointer (index into buffer)
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// events
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int m_id; // socket id
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wxEvtHandler *m_handler; // event handler
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void *m_clientData; // client data for events
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bool m_notify; // notify events to users?
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wxSocketEventFlags m_eventmask; // which events to notify?
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wxSocketEventFlags m_eventsgot; // collects events received in OnRequest()
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friend class wxSocketReadGuard;
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friend class wxSocketWriteGuard;
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wxDECLARE_NO_COPY_CLASS(wxSocketBase);
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DECLARE_CLASS(wxSocketBase)
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};
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// --------------------------------------------------------------------------
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// wxSocketServer
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// --------------------------------------------------------------------------
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class WXDLLIMPEXP_NET wxSocketServer : public wxSocketBase
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{
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public:
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wxSocketServer(const wxSockAddress& addr,
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wxSocketFlags flags = wxSOCKET_NONE);
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wxSocketBase* Accept(bool wait = true);
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bool AcceptWith(wxSocketBase& socket, bool wait = true);
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bool WaitForAccept(long seconds = -1, long milliseconds = 0);
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wxDECLARE_NO_COPY_CLASS(wxSocketServer);
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DECLARE_CLASS(wxSocketServer)
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};
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// --------------------------------------------------------------------------
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// wxSocketClient
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// --------------------------------------------------------------------------
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class WXDLLIMPEXP_NET wxSocketClient : public wxSocketBase
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{
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public:
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wxSocketClient(wxSocketFlags flags = wxSOCKET_NONE);
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virtual bool Connect(const wxSockAddress& addr, bool wait = true);
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bool Connect(const wxSockAddress& addr,
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const wxSockAddress& local,
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bool wait = true);
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bool WaitOnConnect(long seconds = -1, long milliseconds = 0);
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// Sets initial socket buffer sizes using the SO_SNDBUF and SO_RCVBUF
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// options before calling connect (either one can be -1 to leave it
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// unchanged)
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void SetInitialSocketBuffers(int recv, int send)
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{
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m_initialRecvBufferSize = recv;
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m_initialSendBufferSize = send;
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}
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private:
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virtual bool DoConnect(const wxSockAddress& addr,
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const wxSockAddress* local,
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bool wait = true);
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// buffer sizes, -1 if unset and defaults should be used
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int m_initialRecvBufferSize;
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int m_initialSendBufferSize;
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wxDECLARE_NO_COPY_CLASS(wxSocketClient);
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DECLARE_CLASS(wxSocketClient)
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};
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// --------------------------------------------------------------------------
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// wxDatagramSocket
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// --------------------------------------------------------------------------
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// WARNING: still in alpha stage
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class WXDLLIMPEXP_NET wxDatagramSocket : public wxSocketBase
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{
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public:
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wxDatagramSocket(const wxSockAddress& addr,
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wxSocketFlags flags = wxSOCKET_NONE);
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wxDatagramSocket& RecvFrom(wxSockAddress& addr,
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void *buf,
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wxUint32 nBytes);
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wxDatagramSocket& SendTo(const wxSockAddress& addr,
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const void* buf,
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wxUint32 nBytes);
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/* TODO:
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bool Connect(wxSockAddress& addr);
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*/
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private:
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wxDECLARE_NO_COPY_CLASS(wxDatagramSocket);
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DECLARE_CLASS(wxDatagramSocket)
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};
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// --------------------------------------------------------------------------
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// wxSocketEvent
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// --------------------------------------------------------------------------
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class WXDLLIMPEXP_NET wxSocketEvent : public wxEvent
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{
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public:
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wxSocketEvent(int id = 0)
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: wxEvent(id, wxEVT_SOCKET)
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{
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}
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wxSocketNotify GetSocketEvent() const { return m_event; }
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wxSocketBase *GetSocket() const
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{ return (wxSocketBase *) GetEventObject(); }
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void *GetClientData() const { return m_clientData; }
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virtual wxEvent *Clone() const { return new wxSocketEvent(*this); }
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virtual wxEventCategory GetEventCategory() const { return wxEVT_CATEGORY_SOCKET; }
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public:
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wxSocketNotify m_event;
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void *m_clientData;
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DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxSocketEvent)
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};
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typedef void (wxEvtHandler::*wxSocketEventFunction)(wxSocketEvent&);
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#define wxSocketEventHandler(func) \
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wxEVENT_HANDLER_CAST(wxSocketEventFunction, func)
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#define EVT_SOCKET(id, func) \
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wx__DECLARE_EVT1(wxEVT_SOCKET, id, wxSocketEventHandler(func))
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#endif // wxUSE_SOCKETS
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#endif // _WX_SOCKET_H_
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