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socket.cpp
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2002-07-30
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/////////////////////////////////////////////////////////////////////////////
// Name: socket.cpp
// Purpose: Socket handler classes
// Authors: Guilhem Lavaux, Guillermo Rodriguez Garcia
// Created: April 1997
// Copyright: (C) 1999-1997, Guilhem Lavaux
// (C) 2000-1999, Guillermo Rodriguez Garcia
// RCS_ID: $Id: socket.cpp,v 1.105 2002/07/29 04:13:24 RL Exp $
// License: see wxWindows license
/////////////////////////////////////////////////////////////////////////////
// ==========================================================================
// Declarations
// ==========================================================================
#ifdef __GNUG__
#pragma implementation "socket.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_SOCKETS
#include "wx/app.h"
#include "wx/defs.h"
#include "wx/object.h"
#include "wx/string.h"
#include "wx/timer.h"
#include "wx/utils.h"
#include "wx/module.h"
#include "wx/log.h"
#include "wx/intl.h"
#include "wx/event.h"
#if wxUSE_GUI
#include "wx/gdicmn.h" // for wxPendingDelete
#endif // wxUSE_GUI
#include "wx/sckaddr.h"
#include "wx/socket.h"
// --------------------------------------------------------------------------
// macros and constants
// --------------------------------------------------------------------------
// discard buffer
#define MAX_DISCARD_SIZE (10 * 1024)
// what to do within waits: in wxBase we don't do anything as we don't have
// the event loop anyhow (for now). In GUI apps we have 2 cases: from the main
// thread itself we have to call wxYield() to let the events (including the
// GUI events and the low-level (not wxWindows) events from GSocket) be
// processed. From another thread it is enough to just call wxThread::Yield()
// which will give away the rest of our time slice: the explanation is that
// the events will be processed by the main thread anyhow, without calling
// wxYield(), but we don't want to eat the CPU time uselessly while sitting
// in the loop waiting for the data
#if wxUSE_GUI
#if wxUSE_THREADS
#define PROCESS_EVENTS() \
{ \
if ( wxThread::IsMain() ) \
wxYield(); \
else \
wxThread::Yield(); \
}
#else // !wxUSE_THREADS
#define PROCESS_EVENTS() wxYield()
#endif // wxUSE_THREADS/!wxUSE_THREADS
#else // !wxUSE_GUI
#define PROCESS_EVENTS()
#endif // wxUSE_GUI/!wxUSE_GUI
#define wxTRACE_Socket _T("wxSocket")
// --------------------------------------------------------------------------
// wxWin macros
// --------------------------------------------------------------------------
IMPLEMENT_CLASS(wxSocketBase, wxObject)
IMPLEMENT_CLASS(wxSocketServer, wxSocketBase)
IMPLEMENT_CLASS(wxSocketClient, wxSocketBase)
IMPLEMENT_CLASS(wxDatagramSocket, wxSocketBase)
IMPLEMENT_DYNAMIC_CLASS(wxSocketEvent, wxEvent)
// --------------------------------------------------------------------------
// private classes
// --------------------------------------------------------------------------
class wxSocketState : public wxObject
{
public:
wxSocketFlags m_flags;
wxSocketEventFlags m_eventmask;
bool m_notify;
void *m_clientData;
#if WXWIN_COMPATIBILITY
wxSocketBase::wxSockCbk m_cbk;
char *m_cdata;
#endif // WXWIN_COMPATIBILITY
public:
wxSocketState() : wxObject() {}
};
// ==========================================================================
// wxSocketBase
// ==========================================================================
// --------------------------------------------------------------------------
// Initialization and shutdown
// --------------------------------------------------------------------------
// FIXME-MT: all this is MT-unsafe, of course, we should protect all accesses
// to m_countInit with a crit section
size_t wxSocketBase::m_countInit = 0;
bool wxSocketBase::IsInitialized()
{
return m_countInit > 0;
}
bool wxSocketBase::Initialize()
{
if ( !m_countInit++ )
{
if ( !GSocket_Init() )
{
m_countInit--;
return FALSE;
}
}
return TRUE;
}
void wxSocketBase::Shutdown()
{
// we should be initialized
wxASSERT_MSG( m_countInit, _T("extra call to Shutdown()") );
if ( !--m_countInit )
{
GSocket_Cleanup();
}
}
// --------------------------------------------------------------------------
// Ctor and dtor
// --------------------------------------------------------------------------
void wxSocketBase::Init()
{
m_socket = NULL;
m_type = wxSOCKET_UNINIT;
// state
m_flags = 0;
m_connected =
m_establishing =
m_reading =
m_writing =
m_error = FALSE;
m_lcount = 0;
m_timeout = 600;
m_beingDeleted = FALSE;
// pushback buffer
m_unread = NULL;
m_unrd_size = 0;
m_unrd_cur = 0;
// events
m_id = -1;
m_handler = NULL;
m_clientData = NULL;
m_notify = FALSE;
m_eventmask = 0;
#if WXWIN_COMPATIBILITY
m_cbk = NULL;
m_cdata = NULL;
#endif // WXWIN_COMPATIBILITY
if ( !IsInitialized() )
{
// this Initialize() will be undone by wxSocketModule::OnExit(), all the
// other calls to it should be matched by a call to Shutdown()
Initialize();
}
}
wxSocketBase::wxSocketBase()
{
Init();
}
wxSocketBase::wxSocketBase(wxSocketFlags flags, wxSocketType type)
{
Init();
m_flags = flags;
m_type = type;
}
wxSocketBase::~wxSocketBase()
{
// Just in case the app called Destroy() *and* then deleted
// the socket immediately: don't leave dangling pointers.
#if wxUSE_GUI
wxPendingDelete.DeleteObject(this);
#endif
// Shutdown and close the socket
if (!m_beingDeleted)
Close();
// Destroy the GSocket object
if (m_socket)
GSocket_destroy(m_socket);
// Free the pushback buffer
if (m_unread)
free(m_unread);
}
bool wxSocketBase::Destroy()
{
// Delayed destruction: the socket will be deleted during the next
// idle loop iteration. This ensures that all pending events have
// been processed.
m_beingDeleted = TRUE;
// Shutdown and close the socket
Close();
// Supress events from now on
Notify(FALSE);
#if wxUSE_GUI
if ( !wxPendingDelete.Member(this) )
wxPendingDelete.Append(this);
#else
delete this;
#endif
return TRUE;
}
// --------------------------------------------------------------------------
// Basic IO calls
// --------------------------------------------------------------------------
// The following IO operations update m_error and m_lcount:
// {Read, Write, ReadMsg, WriteMsg, Peek, Unread, Discard}
//
// TODO: Should Connect, Accept and AcceptWith update m_error?
bool wxSocketBase::Close()
{
// Interrupt pending waits
InterruptWait();
if (m_socket)
{
// Disable callbacks
GSocket_UnsetCallback(m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG);
// Shutdown the connection
GSocket_Shutdown(m_socket);
}
m_connected = FALSE;
m_establishing = FALSE;
return TRUE;
}
wxSocketBase& wxSocketBase::Read(void* buffer, wxUint32 nbytes)
{
// Mask read events
m_reading = TRUE;
m_lcount = _Read(buffer, nbytes);
// If in wxSOCKET_WAITALL mode, all bytes should have been read.
if (m_flags & wxSOCKET_WAITALL)
m_error = (m_lcount != nbytes);
else
m_error = (m_lcount == 0);
// Allow read events from now on
m_reading = FALSE;
return *this;
}
wxUint32 wxSocketBase::_Read(void* buffer, wxUint32 nbytes)
{
int total;
int ret = 1;
// Try the pushback buffer first
total = GetPushback(buffer, nbytes, FALSE);
nbytes -= total;
buffer = (char *)buffer + total;
// Return now in one of the following cases:
// - the socket is invalid,
// - we got all the data,
// - we got *some* data and we are not using wxSOCKET_WAITALL.
if ( !m_socket ||
!nbytes ||
((total != 0) && !(m_flags & wxSOCKET_WAITALL)) )
return total;
// Possible combinations (they are checked in this order)
// wxSOCKET_NOWAIT
// wxSOCKET_WAITALL (with or without wxSOCKET_BLOCK)
// wxSOCKET_BLOCK
// wxSOCKET_NONE
//
if (m_flags & wxSOCKET_NOWAIT)
{
GSocket_SetNonBlocking(m_socket, 1);
ret = GSocket_Read(m_socket, (char *)buffer, nbytes);
GSocket_SetNonBlocking(m_socket, 0);
if (ret > 0)
total += ret;
}
else
{
bool more = TRUE;
while (more)
{
if ( !(m_flags & wxSOCKET_BLOCK) && !WaitForRead() )
break;
ret = GSocket_Read(m_socket, (char *)buffer, nbytes);
if (ret > 0)
{
total += ret;
nbytes -= ret;
buffer = (char *)buffer + ret;
}
// If we got here and wxSOCKET_WAITALL is not set, we can leave
// now. Otherwise, wait until we recv all the data or until there
// is an error.
//
more = (ret > 0 && nbytes > 0 && (m_flags & wxSOCKET_WAITALL));
}
}
return total;
}
wxSocketBase& wxSocketBase::ReadMsg(void* buffer, wxUint32 nbytes)
{
wxUint32 len, len2, sig, total;
bool error;
int old_flags;
struct
{
unsigned char sig[4];
unsigned char len[4];
} msg;
// Mask read events
m_reading = TRUE;
total = 0;
error = TRUE;
old_flags = m_flags;
SetFlags((m_flags & wxSOCKET_BLOCK) | wxSOCKET_WAITALL);
if (_Read(&msg, sizeof(msg)) != sizeof(msg))
goto exit;
sig = (wxUint32)msg.sig[0];
sig |= (wxUint32)(msg.sig[1] << 8);
sig |= (wxUint32)(msg.sig[2] << 16);
sig |= (wxUint32)(msg.sig[3] << 24);
if (sig != 0xfeeddead)
{
wxLogWarning(_("wxSocket: invalid signature in ReadMsg."));
goto exit;
}
len = (wxUint32)msg.len[0];
len |= (wxUint32)(msg.len[1] << 8);
len |= (wxUint32)(msg.len[2] << 16);
len |= (wxUint32)(msg.len[3] << 24);
if (len > nbytes)
{
len2 = len - nbytes;
len = nbytes;
}
else
len2 = 0;
// Don't attemp to read if the msg was zero bytes long.
if (len)
{
total = _Read(buffer, len);
if (total != len)
goto exit;
}
if (len2)
{
char *discard_buffer = new char[MAX_DISCARD_SIZE];
long discard_len;
// NOTE: discarded bytes don't add to m_lcount.
do
{
discard_len = ((len2 > MAX_DISCARD_SIZE)? MAX_DISCARD_SIZE : len2);
discard_len = _Read(discard_buffer, (wxUint32)discard_len);
len2 -= (wxUint32)discard_len;
}
while ((discard_len > 0) && len2);
delete [] discard_buffer;
if (len2 != 0)
goto exit;
}
if (_Read(&msg, sizeof(msg)) != sizeof(msg))
goto exit;
sig = (wxUint32)msg.sig[0];
sig |= (wxUint32)(msg.sig[1] << 8);
sig |= (wxUint32)(msg.sig[2] << 16);
sig |= (wxUint32)(msg.sig[3] << 24);
if (sig != 0xdeadfeed)
{
wxLogWarning(_("wxSocket: invalid signature in ReadMsg."));
goto exit;
}
// everything was OK
error = FALSE;
exit:
m_error = error;
m_lcount = total;
m_reading = FALSE;
SetFlags(old_flags);
return *this;
}
wxSocketBase& wxSocketBase::Peek(void* buffer, wxUint32 nbytes)
{
// Mask read events
m_reading = TRUE;
m_lcount = _Read(buffer, nbytes);
Pushback(buffer, m_lcount);
// If in wxSOCKET_WAITALL mode, all bytes should have been read.
if (m_flags & wxSOCKET_WAITALL)
m_error = (m_lcount != nbytes);
else
m_error = (m_lcount == 0);
// Allow read events again
m_reading = FALSE;
return *this;
}
wxSocketBase& wxSocketBase::Write(const void *buffer, wxUint32 nbytes)
{
// Mask write events
m_writing = TRUE;
m_lcount = _Write(buffer, nbytes);
// If in wxSOCKET_WAITALL mode, all bytes should have been written.
if (m_flags & wxSOCKET_WAITALL)
m_error = (m_lcount != nbytes);
else
m_error = (m_lcount == 0);
// Allow write events again
m_writing = FALSE;
return *this;
}
wxUint32 wxSocketBase::_Write(const void *buffer, wxUint32 nbytes)
{
wxUint32 total = 0;
int ret = 1;
// If the socket is invalid or parameters are ill, return immediately
if (!m_socket || !buffer || !nbytes)
return 0;
// Possible combinations (they are checked in this order)
// wxSOCKET_NOWAIT
// wxSOCKET_WAITALL (with or without wxSOCKET_BLOCK)
// wxSOCKET_BLOCK
// wxSOCKET_NONE
//
if (m_flags & wxSOCKET_NOWAIT)
{
GSocket_SetNonBlocking(m_socket, 1);
ret = GSocket_Write(m_socket, (const char *)buffer, nbytes);
GSocket_SetNonBlocking(m_socket, 0);
if (ret > 0)
total = ret;
}
else
{
bool more = TRUE;
while (more)
{
if ( !(m_flags & wxSOCKET_BLOCK) && !WaitForWrite() )
break;
ret = GSocket_Write(m_socket, (const char *)buffer, nbytes);
if (ret > 0)
{
total += ret;
nbytes -= ret;
buffer = (const char *)buffer + ret;
}
// If we got here and wxSOCKET_WAITALL is not set, we can leave
// now. Otherwise, wait until we send all the data or until there
// is an error.
//
more = (ret > 0 && nbytes > 0 && (m_flags & wxSOCKET_WAITALL));
}
}
return total;
}
wxSocketBase& wxSocketBase::WriteMsg(const void *buffer, wxUint32 nbytes)
{
wxUint32 total;
bool error;
int old_flags;
struct
{
unsigned char sig[4];
unsigned char len[4];
} msg;
// Mask write events
m_writing = TRUE;
error = TRUE;
total = 0;
old_flags = m_flags;
SetFlags((m_flags & wxSOCKET_BLOCK) | wxSOCKET_WAITALL);
msg.sig[0] = (unsigned char) 0xad;
msg.sig[1] = (unsigned char) 0xde;
msg.sig[2] = (unsigned char) 0xed;
msg.sig[3] = (unsigned char) 0xfe;
msg.len[0] = (unsigned char) (nbytes & 0xff);
msg.len[1] = (unsigned char) ((nbytes >> 8) & 0xff);
msg.len[2] = (unsigned char) ((nbytes >> 16) & 0xff);
msg.len[3] = (unsigned char) ((nbytes >> 24) & 0xff);
if (_Write(&msg, sizeof(msg)) < sizeof(msg))
goto exit;
total = _Write(buffer, nbytes);
if (total < nbytes)
goto exit;
msg.sig[0] = (unsigned char) 0xed;
msg.sig[1] = (unsigned char) 0xfe;
msg.sig[2] = (unsigned char) 0xad;
msg.sig[3] = (unsigned char) 0xde;
msg.len[0] = msg.len[1] = msg.len[2] = msg.len[3] = (char) 0;
if ((_Write(&msg, sizeof(msg))) < sizeof(msg))
goto exit;
// everything was OK
error = FALSE;
exit:
m_error = error;
m_lcount = total;
m_writing = FALSE;
return *this;
}
wxSocketBase& wxSocketBase::Unread(const void *buffer, wxUint32 nbytes)
{
if (nbytes != 0)
Pushback(buffer, nbytes);
m_error = FALSE;
m_lcount = nbytes;
return *this;
}
wxSocketBase& wxSocketBase::Discard()
{
int old_flags;
char *buffer = new char[MAX_DISCARD_SIZE];
wxUint32 ret;
wxUint32 total = 0;
// Mask read events
m_reading = TRUE;
old_flags = m_flags;
SetFlags(wxSOCKET_NOWAIT);
do
{
ret = _Read(buffer, MAX_DISCARD_SIZE);
total += ret;
}
while (ret == MAX_DISCARD_SIZE);
delete[] buffer;
m_lcount = total;
m_error = FALSE;
// Allow read events again
m_reading = FALSE;
return *this;
}
// --------------------------------------------------------------------------
// Wait functions
// --------------------------------------------------------------------------
// All Wait functions poll the socket using GSocket_Select() to
// check for the specified combination of conditions, until one
// of these conditions become true, an error occurs, or the
// timeout elapses. The polling loop calls PROCESS_EVENTS(), so
// this won't block the GUI.
bool wxSocketBase::_Wait(long seconds,
long milliseconds,
wxSocketEventFlags flags)
{
GSocketEventFlags result;
long timeout;
// Set this to TRUE to interrupt ongoing waits
m_interrupt = FALSE;
// Check for valid socket
if (!m_socket)
return FALSE;
// Check for valid timeout value.
if (seconds != -1)
timeout = seconds * 1000 + milliseconds;
else
timeout = m_timeout * 1000;
// Wait in an active polling loop.
//
// NOTE: We duplicate some of the code in OnRequest, but this doesn't
// hurt. It has to be here because the (GSocket) event might arrive
// a bit delayed, and it has to be in OnRequest as well because we
// don't know whether the Wait functions are being used.
//
// Do this at least once (important if timeout == 0, when
// we are just polling). Also, if just polling, do not yield.
wxStopWatch chrono;
bool done = FALSE;
while (!done)
{
result = GSocket_Select(m_socket, flags | GSOCK_LOST_FLAG);
// Incoming connection (server) or connection established (client)
if (result & GSOCK_CONNECTION_FLAG)
{
m_connected = TRUE;
m_establishing = FALSE;
return TRUE;
}
// Data available or output buffer ready
if ((result & GSOCK_INPUT_FLAG) || (result & GSOCK_OUTPUT_FLAG))
{
return TRUE;
}
// Connection lost
if (result & GSOCK_LOST_FLAG)
{
m_connected = FALSE;
m_establishing = FALSE;
return (flags & GSOCK_LOST_FLAG) != 0;
}
// Wait more?
if ((!timeout) || (chrono.Time() > timeout) || (m_interrupt))
done = TRUE;
else
PROCESS_EVENTS();
}
return FALSE;
}
bool wxSocketBase::Wait(long seconds, long milliseconds)
{
return _Wait(seconds, milliseconds, GSOCK_INPUT_FLAG |
GSOCK_OUTPUT_FLAG |
GSOCK_CONNECTION_FLAG |
GSOCK_LOST_FLAG);
}
bool wxSocketBase::WaitForRead(long seconds, long milliseconds)
{
// Check pushback buffer before entering _Wait
if (m_unread)
return TRUE;
// Note that GSOCK_INPUT_LOST has to be explicitly passed to
// _Wait becuase of the semantics of WaitForRead: a return
// value of TRUE means that a GSocket_Read call will return
// immediately, not that there is actually data to read.
return _Wait(seconds, milliseconds, GSOCK_INPUT_FLAG |
GSOCK_LOST_FLAG);
}
bool wxSocketBase::WaitForWrite(long seconds, long milliseconds)
{
return _Wait(seconds, milliseconds, GSOCK_OUTPUT_FLAG);
}
bool wxSocketBase::WaitForLost(long seconds, long milliseconds)
{
return _Wait(seconds, milliseconds, GSOCK_LOST_FLAG);
}
// --------------------------------------------------------------------------
// Miscellaneous
// --------------------------------------------------------------------------
//
// Get local or peer address
//
bool wxSocketBase::GetPeer(wxSockAddress& addr_man) const
{
GAddress *peer;
if (!m_socket)
return FALSE;
peer = GSocket_GetPeer(m_socket);
// copying a null address would just trigger an assert anyway
if (!peer)
return FALSE;
addr_man.SetAddress(peer);
GAddress_destroy(peer);
return TRUE;
}
bool wxSocketBase::GetLocal(wxSockAddress& addr_man) const
{
GAddress *local;
if (!m_socket)
return FALSE;
local = GSocket_GetLocal(m_socket);
addr_man.SetAddress(local);
GAddress_destroy(local);
return TRUE;
}
//
// Save and restore socket state
//
void wxSocketBase::SaveState()
{
wxSocketState *state;
state = new wxSocketState();
state->m_flags = m_flags;
state->m_notify = m_notify;
state->m_eventmask = m_eventmask;
state->m_clientData = m_clientData;
#if WXWIN_COMPATIBILITY
state->m_cbk = m_cbk;
state->m_cdata = m_cdata;
#endif // WXWIN_COMPATIBILITY
m_states.Append(state);
}
void wxSocketBase::RestoreState()
{
wxNode *node;
wxSocketState *state;
node = m_states.Last();
if (!node)
return;
state = (wxSocketState *)node->Data();
m_flags = state->m_flags;
m_notify = state->m_notify;
m_eventmask = state->m_eventmask;
m_clientData = state->m_clientData;
#if WXWIN_COMPATIBILITY
m_cbk = state->m_cbk;
m_cdata = state->m_cdata;
#endif // WXWIN_COMPATIBILITY
delete node;
delete state;
}
//
// Timeout and flags
//
void wxSocketBase::SetTimeout(long seconds)
{
m_timeout = seconds;
if (m_socket)
GSocket_SetTimeout(m_socket, m_timeout * 1000);
}
void wxSocketBase::SetFlags(wxSocketFlags flags)
{
m_flags = flags;
}
// --------------------------------------------------------------------------
// Callbacks (now obsolete - use events instead)
// --------------------------------------------------------------------------
#if WXWIN_COMPATIBILITY
wxSocketBase::wxSockCbk wxSocketBase::Callback(wxSockCbk cbk_)
{
wxSockCbk old_cbk = cbk_;
m_cbk = cbk_;
return old_cbk;
}
char *wxSocketBase::CallbackData(char *data)
{
char *old_data = m_cdata;
m_cdata = data;
return old_data;
}
#endif // WXWIN_COMPATIBILITY
// --------------------------------------------------------------------------
// Event handling
// --------------------------------------------------------------------------
// A note on how events are processed, which is probably the most
// difficult thing to get working right while keeping the same API
// and functionality for all platforms.
//
// When GSocket detects an event, it calls wx_socket_callback, which in
// turn just calls wxSocketBase::OnRequest in the corresponding wxSocket
// object. OnRequest does some housekeeping, and if the event is to be
// propagated to the user, it creates a new wxSocketEvent object and
// posts it. The event is not processed immediately, but delayed with
// AddPendingEvent instead. This is necessary in order to decouple the
// event processing from wx_socket_callback; otherwise, subsequent IO
// calls made from the user event handler would fail, as gtk callbacks
// are not reentrant.
//
// Note that, unlike events, user callbacks (now deprecated) are _not_
// decoupled from wx_socket_callback and thus they suffer from a variety
// of problems. Avoid them where possible and use events instead.
extern "C"
void LINKAGEMODE wx_socket_callback(GSocket * WXUNUSED(socket),
GSocketEvent notification,
char *cdata)
{
wxSocketBase *sckobj = (wxSocketBase *)cdata;
sckobj->OnRequest((wxSocketNotify) notification);
}
void wxSocketBase::OnRequest(wxSocketNotify notification)
{
// NOTE: We duplicate some of the code in _Wait, but this doesn't
// hurt. It has to be here because the (GSocket) event might arrive
// a bit delayed, and it has to be in _Wait as well because we don't
// know whether the Wait functions are being used.
switch(notification)
{
case wxSOCKET_CONNECTION:
m_establishing = FALSE;
m_connected = TRUE;
break;
// If we are in the middle of a R/W operation, do not
// propagate events to users. Also, filter 'late' events
// which are no longer valid.
case wxSOCKET_INPUT:
if (m_reading || !GSocket_Select(m_socket, GSOCK_INPUT_FLAG))
return;
break;
case wxSOCKET_OUTPUT:
if (m_writing || !GSocket_Select(m_socket, GSOCK_OUTPUT_FLAG))
return;
break;
case wxSOCKET_LOST:
m_connected = FALSE;
m_establishing = FALSE;
break;
default:
break;
}
// Schedule the event
wxSocketEventFlags flag = 0;
switch (notification)
{
case GSOCK_INPUT: flag = GSOCK_INPUT_FLAG; break;
case GSOCK_OUTPUT: flag = GSOCK_OUTPUT_FLAG; break;
case GSOCK_CONNECTION: flag = GSOCK_CONNECTION_FLAG; break;
case GSOCK_LOST: flag = GSOCK_LOST_FLAG; break;
default:
wxLogWarning(_("wxSocket: unknown event!."));
return;
}
if (((m_eventmask & flag) == flag) && m_notify)
{
if (m_handler)
{
wxSocketEvent event(m_id);
event.m_event = notification;
event.m_clientData = m_clientData;
event.SetEventObject(this);
m_handler->AddPendingEvent(event);
}
#if WXWIN_COMPATIBILITY
if (m_cbk)
m_cbk(*this, notification, m_cdata);
#endif // WXWIN_COMPATIBILITY
}
}
void wxSocketBase::Notify(bool notify)
{
m_notify = notify;
}
void wxSocketBase::SetNotify(wxSocketEventFlags flags)
{
m_eventmask = flags;
}
void wxSocketBase::SetEventHandler(wxEvtHandler& handler, int id)
{
m_handler = &handler;
m_id = id;
}
// --------------------------------------------------------------------------
// Pushback buffer
// --------------------------------------------------------------------------
void wxSocketBase::Pushback(const void *buffer, wxUint32 size)
{
if (!size) return;
if (m_unread == NULL)
m_unread = malloc(size);
else
{
void *tmp;
tmp = malloc(m_unrd_size + size);
memcpy((char *)tmp + size, m_unread, m_unrd_size);
free(m_unread);
m_unread = tmp;
}
m_unrd_size += size;
memcpy(m_unread, buffer, size);
}
wxUint32 wxSocketBase::GetPushback(void *buffer, wxUint32 size, bool peek)
{
if (!m_unrd_size)
return 0;
if (size > (m_unrd_size-m_unrd_cur))
size = m_unrd_size-m_unrd_cur;
memcpy(buffer, (char *)m_unread + m_unrd_cur, size);
if (!peek)
{
m_unrd_cur += size;
if (m_unrd_size == m_unrd_cur)
{
free(m_unread);
m_unread = NULL;
m_unrd_size = 0;
m_unrd_cur = 0;
}
}
return size;
}
// ==========================================================================
// wxSocketServer
// ==========================================================================
// --------------------------------------------------------------------------
// Ctor
// --------------------------------------------------------------------------
wxSocketServer::wxSocketServer(wxSockAddress& addr_man,
wxSocketFlags flags)
: wxSocketBase(flags, wxSOCKET_SERVER)
{
wxLogTrace( wxTRACE_Socket, _T("Opening wxSocketServer") );
m_socket = GSocket_new();
if (!m_socket)
{
wxLogTrace( wxTRACE_Socket, _T("*** GSocket_new failed") );
return;
}
// Setup the socket as server
GSocket_SetLocal(m_socket, addr_man.GetAddress());
if (GSocket_SetServer(m_socket) != GSOCK_NOERROR)
{
GSocket_destroy(m_socket);
m_socket = NULL;
wxLogTrace( wxTRACE_Socket, _T("*** GSocket_SetServer failed") );
return;
}
GSocket_SetTimeout(m_socket, m_timeout * 1000);
GSocket_SetCallback(m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG,
wx_socket_callback, (char *)this);
}
// --------------------------------------------------------------------------
// Accept
// --------------------------------------------------------------------------
bool wxSocketServer::AcceptWith(wxSocketBase& sock, bool wait)
{
GSocket *child_socket;
if (!m_socket)
return FALSE;
// If wait == FALSE, then the call should be nonblocking.
// When we are finished, we put the socket to blocking mode
// again.
if (!wait)
GSocket_SetNonBlocking(m_socket, 1);
child_socket = GSocket_WaitConnection(m_socket);
if (!wait)
GSocket_SetNonBlocking(m_socket, 0);
if (!child_socket)
return FALSE;
sock.m_type = wxSOCKET_BASE;
sock.m_socket = child_socket;
sock.m_connected = TRUE;
GSocket_SetTimeout(sock.m_socket, sock.m_timeout * 1000);
GSocket_SetCallback(sock.m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG,
wx_socket_callback, (char *)&sock);
return TRUE;
}
wxSocketBase *wxSocketServer::Accept(bool wait)
{
wxSocketBase* sock = new wxSocketBase();
sock->SetFlags(m_flags);
if (!AcceptWith(*sock, wait))
{
sock->Destroy();
sock = NULL;
}
return sock;
}
bool wxSocketServer::WaitForAccept(long seconds, long milliseconds)
{
return _Wait(seconds, milliseconds, GSOCK_CONNECTION_FLAG);
}
// ==========================================================================
// wxSocketClient
// ==========================================================================
// --------------------------------------------------------------------------
// Ctor and dtor
// --------------------------------------------------------------------------
wxSocketClient::wxSocketClient(wxSocketFlags flags)
: wxSocketBase(flags, wxSOCKET_CLIENT)
{
}
wxSocketClient::~wxSocketClient()
{
}
// --------------------------------------------------------------------------
// Connect
// --------------------------------------------------------------------------
bool wxSocketClient::Connect(wxSockAddress& addr_man, bool wait)
{
GSocketError err;
if (m_socket)
{
// Shutdown and destroy the socket
Close();
GSocket_destroy(m_socket);
}
m_socket = GSocket_new();
m_connected = FALSE;
m_establishing = FALSE;
if (!m_socket)
return FALSE;
GSocket_SetTimeout(m_socket, m_timeout * 1000);
GSocket_SetCallback(m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG,
wx_socket_callback, (char *)this);
// If wait == FALSE, then the call should be nonblocking.
// When we are finished, we put the socket to blocking mode
// again.
if (!wait)
GSocket_SetNonBlocking(m_socket, 1);
GSocket_SetPeer(m_socket, addr_man.GetAddress());
err = GSocket_Connect(m_socket, GSOCK_STREAMED);
if (!wait)
GSocket_SetNonBlocking(m_socket, 0);
if (err != GSOCK_NOERROR)
{
if (err == GSOCK_WOULDBLOCK)
m_establishing = TRUE;
return FALSE;
}
m_connected = TRUE;
return TRUE;
}
bool wxSocketClient::WaitOnConnect(long seconds, long milliseconds)
{
if (m_connected) // Already connected
return TRUE;
if (!m_establishing || !m_socket) // No connection in progress
return FALSE;
return _Wait(seconds, milliseconds, GSOCK_CONNECTION_FLAG |
GSOCK_LOST_FLAG);
}
// ==========================================================================
// wxDatagramSocket
// ==========================================================================
/* NOTE: experimental stuff - might change */
wxDatagramSocket::wxDatagramSocket( wxSockAddress& addr,
wxSocketFlags flags )
: wxSocketBase( flags, wxSOCKET_DATAGRAM )
{
// Create the socket
m_socket = GSocket_new();
if(!m_socket)
return;
// Setup the socket as non connection oriented
GSocket_SetLocal(m_socket, addr.GetAddress());
if( GSocket_SetNonOriented(m_socket) != GSOCK_NOERROR )
{
GSocket_destroy(m_socket);
m_socket = NULL;
return;
}
// Initialize all stuff
m_connected = FALSE;
m_establishing = FALSE;
GSocket_SetTimeout( m_socket, m_timeout );
GSocket_SetCallback( m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG,
wx_socket_callback, (char*)this );
}
wxDatagramSocket& wxDatagramSocket::RecvFrom( wxSockAddress& addr,
void* buf,
wxUint32 nBytes )
{
Read(buf, nBytes);
GetPeer(addr);
return (*this);
}
wxDatagramSocket& wxDatagramSocket::SendTo( wxSockAddress& addr,
const void* buf,
wxUint32 nBytes )
{
GSocket_SetPeer(m_socket, addr.GetAddress());
Write(buf, nBytes);
return (*this);
}
// ==========================================================================
// wxSocketModule
// ==========================================================================
class WXDLLEXPORT wxSocketModule : public wxModule
{
public:
virtual bool OnInit()
{
// wxSocketBase will call GSocket_Init() itself when/if needed
return TRUE;
}
virtual void OnExit()
{
if ( wxSocketBase::IsInitialized() )
wxSocketBase::Shutdown();
}
private:
DECLARE_DYNAMIC_CLASS(wxSocketModule)
};
IMPLEMENT_DYNAMIC_CLASS(wxSocketModule, wxModule)
#endif
// wxUSE_SOCKETS
// vi:sts=4:sw=4:et