/////////////////////////////////////////////////////////////////////////////
-// Name: socket.cpp
+// Name: src/common/socket.cpp
// Purpose: Socket handler classes
// Authors: Guilhem Lavaux, Guillermo Rodriguez Garcia
// Created: April 1997
-// Updated: September 1999
-// Copyright: (C) 1999, 1998, 1997, Guilhem Lavaux
-// (C) 1999, Guillermo Rodriguez Garcia
+// Copyright: (C) 1999-1997, Guilhem Lavaux
+// (C) 1999-2000, Guillermo Rodriguez Garcia
+// (C) 2008 Vadim Zeitlin
// RCS_ID: $Id$
-// License: see wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "socket.h"
-#endif
+// ==========================================================================
+// Declarations
+// ==========================================================================
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
#if wxUSE_SOCKETS
-/////////////////////////////////////////////////////////////////////////////
-// wxWindows headers
-/////////////////////////////////////////////////////////////////////////////
-#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 <stdlib.h>
-#include <string.h>
-#include <ctype.h>
+#include "wx/socket.h"
-/////////////////////////////////////////////////////////////////////////////
-// wxSocket headers
-/////////////////////////////////////////////////////////////////////////////
+#ifndef WX_PRECOMP
+ #include "wx/object.h"
+ #include "wx/string.h"
+ #include "wx/intl.h"
+ #include "wx/log.h"
+ #include "wx/event.h"
+ #include "wx/app.h"
+ #include "wx/utils.h"
+ #include "wx/timer.h"
+ #include "wx/module.h"
+#endif
+
+#include "wx/apptrait.h"
#include "wx/sckaddr.h"
-#include "wx/socket.h"
+#include "wx/stopwatch.h"
+#include "wx/thread.h"
+#include "wx/evtloop.h"
+#include "wx/link.h"
+
+#include "wx/private/fd.h"
+#include "wx/private/socket.h"
+
+#ifdef __UNIX__
+ #include <errno.h>
+#endif
+
+// we use MSG_NOSIGNAL to avoid getting SIGPIPE when sending data to a remote
+// host which closed the connection if it is available, otherwise we rely on
+// SO_NOSIGPIPE existency
+//
+// this should cover all the current Unix systems (Windows never sends any
+// signals anyhow) but if we find one that has neither we should explicitly
+// ignore SIGPIPE for it
+// OpenVMS has neither MSG_NOSIGNAL nor SO_NOSIGPIPE. However the socket sample
+// seems to work. Not sure if problems will show up on OpenVMS using sockets.
+#ifdef MSG_NOSIGNAL
+ #define wxSOCKET_MSG_NOSIGNAL MSG_NOSIGNAL
+#else // MSG_NOSIGNAL not available (BSD including OS X)
+ // next best possibility is to use SO_NOSIGPIPE socket option, this covers
+ // BSD systems (including OS X) -- but if we don't have it neither (AIX and
+ // old HP-UX do not), we have to fall back to the old way of simply
+ // disabling SIGPIPE temporarily, so define a class to do it in a safe way
+ #if defined(__UNIX__) && !defined(SO_NOSIGPIPE)
+ extern "C" { typedef void (*wxSigHandler_t)(int); }
+ namespace
+ {
+ class IgnoreSignal
+ {
+ public:
+ // ctor disables the given signal
+ IgnoreSignal(int sig)
+ : m_handler(signal(sig, SIG_IGN)),
+ m_sig(sig)
+ {
+ }
+
+ // dtor restores the old handler
+ ~IgnoreSignal()
+ {
+ signal(m_sig, m_handler);
+ }
+
+ private:
+ const wxSigHandler_t m_handler;
+ const int m_sig;
+
+ wxDECLARE_NO_COPY_CLASS(IgnoreSignal);
+ };
+ } // anonymous namespace
+
+ #define wxNEEDS_IGNORE_SIGPIPE
+ #endif // Unix without SO_NOSIGPIPE
+
+ #define wxSOCKET_MSG_NOSIGNAL 0
+#endif
+
+// DLL options compatibility check:
+#include "wx/build.h"
+WX_CHECK_BUILD_OPTIONS("wxNet")
+
+// --------------------------------------------------------------------------
+// macros and constants
+// --------------------------------------------------------------------------
+
+// event
+wxDEFINE_EVENT(wxEVT_SOCKET, wxSocketEvent);
+
+// discard buffer
+#define MAX_DISCARD_SIZE (10 * 1024)
+
+#define wxTRACE_Socket wxT("wxSocket")
+
+// --------------------------------------------------------------------------
+// wxWin macros
+// --------------------------------------------------------------------------
-// --------------------------------------------------------------
-// ClassInfos
-// --------------------------------------------------------------
-#if !USE_SHARED_LIBRARY
IMPLEMENT_CLASS(wxSocketBase, wxObject)
IMPLEMENT_CLASS(wxSocketServer, wxSocketBase)
IMPLEMENT_CLASS(wxSocketClient, wxSocketBase)
+IMPLEMENT_CLASS(wxDatagramSocket, wxSocketBase)
IMPLEMENT_DYNAMIC_CLASS(wxSocketEvent, wxEvent)
-#endif
+
+// ----------------------------------------------------------------------------
+// private functions
+// ----------------------------------------------------------------------------
+
+namespace
+{
+
+void SetTimeValFromMS(timeval& tv, unsigned long ms)
+{
+ tv.tv_sec = (ms / 1000);
+ tv.tv_usec = (ms % 1000) * 1000;
+}
+
+} // anonymous namespace
+
+// --------------------------------------------------------------------------
+// private classes
+// --------------------------------------------------------------------------
class wxSocketState : public wxObject
{
public:
- bool notify_state;
- GSocketEventFlags evt_notify_state;
- wxSocketBase::wxSockFlags socket_flags;
- wxSocketBase::wxSockCbk c_callback;
- char *c_callback_data;
+ wxSocketFlags m_flags;
+ wxSocketEventFlags m_eventmask;
+ bool m_notify;
+ void *m_clientData;
public:
- wxSocketState() : wxObject() {}
+ wxSocketState() : wxObject() {}
+
+ wxDECLARE_NO_COPY_CLASS(wxSocketState);
+};
+
+// wxSocketWaitModeChanger: temporarily change the socket flags affecting its
+// wait mode
+class wxSocketWaitModeChanger
+{
+public:
+ // temporarily set the flags to include the flag value which may be either
+ // wxSOCKET_NOWAIT or wxSOCKET_WAITALL
+ wxSocketWaitModeChanger(wxSocketBase *socket, int flag)
+ : m_socket(socket),
+ m_oldflags(socket->GetFlags())
+
+ {
+ // We can be passed only wxSOCKET_WAITALL{_READ,_WRITE} or
+ // wxSOCKET_NOWAIT{_READ,_WRITE} normally.
+ wxASSERT_MSG( !(flag & wxSOCKET_WAITALL) || !(flag & wxSOCKET_NOWAIT),
+ "not a wait flag" );
+
+ // preserve wxSOCKET_BLOCK value when switching to wxSOCKET_WAITALL
+ // mode but not when switching to wxSOCKET_NOWAIT as the latter is
+ // incompatible with wxSOCKET_BLOCK
+ if ( flag != wxSOCKET_NOWAIT )
+ flag |= m_oldflags & wxSOCKET_BLOCK;
+
+ socket->SetFlags(flag);
+ }
+
+ ~wxSocketWaitModeChanger()
+ {
+ m_socket->SetFlags(m_oldflags);
+ }
+
+private:
+ wxSocketBase * const m_socket;
+ const int m_oldflags;
+
+ wxDECLARE_NO_COPY_CLASS(wxSocketWaitModeChanger);
};
-// --------------------------------------------------------------
-// wxSocketBase ctor and dtor
-// --------------------------------------------------------------
+// wxSocketRead/WriteGuard are instantiated before starting reading
+// from/writing to the socket
+class wxSocketReadGuard
+{
+public:
+ wxSocketReadGuard(wxSocketBase *socket)
+ : m_socket(socket)
+ {
+ wxASSERT_MSG( !m_socket->m_reading, "read reentrancy?" );
+
+ m_socket->m_reading = true;
+ }
+
+ ~wxSocketReadGuard()
+ {
+ m_socket->m_reading = false;
+
+ // connection could have been lost while reading, in this case calling
+ // ReenableEvents() would assert and is not necessary anyhow
+ wxSocketImpl * const impl = m_socket->m_impl;
+ if ( impl && impl->m_fd != INVALID_SOCKET )
+ impl->ReenableEvents(wxSOCKET_INPUT_FLAG);
+ }
+
+private:
+ wxSocketBase * const m_socket;
+
+ wxDECLARE_NO_COPY_CLASS(wxSocketReadGuard);
+};
-wxSocketBase::wxSocketBase(wxSocketBase::wxSockFlags _flags,
- wxSocketBase::wxSockType _type) :
- wxEvtHandler(),
- m_socket(NULL), m_flags(_flags), m_type(_type),
- m_neededreq(0),
- m_lcount(0), m_timeout(600),
- m_unread(NULL), m_unrd_size(0), m_unrd_cur(0),
- m_cbk(NULL), m_cdata(NULL),
- m_connected(FALSE), m_establishing(FALSE),
- m_notify_state(FALSE), m_id(-1),
- m_defering(NO_DEFER), m_error(FALSE),
- m_states()
+class wxSocketWriteGuard
{
+public:
+ wxSocketWriteGuard(wxSocketBase *socket)
+ : m_socket(socket)
+ {
+ wxASSERT_MSG( !m_socket->m_writing, "write reentrancy?" );
+
+ m_socket->m_writing = true;
+ }
+
+ ~wxSocketWriteGuard()
+ {
+ m_socket->m_writing = false;
+
+ wxSocketImpl * const impl = m_socket->m_impl;
+ if ( impl && impl->m_fd != INVALID_SOCKET )
+ impl->ReenableEvents(wxSOCKET_OUTPUT_FLAG);
+ }
+
+private:
+ wxSocketBase * const m_socket;
+
+ wxDECLARE_NO_COPY_CLASS(wxSocketWriteGuard);
+};
+
+// ============================================================================
+// wxSocketManager
+// ============================================================================
+
+wxSocketManager *wxSocketManager::ms_manager = NULL;
+
+/* static */
+void wxSocketManager::Set(wxSocketManager *manager)
+{
+ wxASSERT_MSG( !ms_manager, "too late to set manager now" );
+
+ ms_manager = manager;
}
-wxSocketBase::wxSocketBase() :
- wxEvtHandler(),
- m_socket(NULL), m_flags(WAITALL | SPEED), m_type(SOCK_UNINIT),
- m_neededreq(0),
- m_lcount(0), m_timeout(600),
- m_unread(NULL), m_unrd_size(0), m_unrd_cur(0),
- m_cbk(NULL), m_cdata(NULL),
- m_connected(FALSE), m_establishing(FALSE),
- m_notify_state(FALSE), m_id(-1),
- m_defering(NO_DEFER), m_error(FALSE),
- m_states()
+/* static */
+void wxSocketManager::Init()
{
+ wxASSERT_MSG( !ms_manager, "shouldn't be initialized twice" );
+
+ /*
+ Details: Initialize() creates a hidden window as a sink for socket
+ events, such as 'read completed'. wxMSW has only one message loop
+ for the main thread. If Initialize is called in a secondary thread,
+ the socket window will be created for the secondary thread, but
+ since there is no message loop on this thread, it will never
+ receive events and all socket operations will time out.
+ BTW, the main thread must not be stopped using sleep or block
+ on a semaphore (a bad idea in any case) or socket operations
+ will time out.
+
+ On the Mac side, Initialize() stores a pointer to the CFRunLoop for
+ the main thread. Because secondary threads do not have run loops,
+ adding event notifications to the "Current" loop would have no
+ effect at all, events would never fire.
+ */
+ wxASSERT_MSG( wxIsMainThread(),
+ "sockets must be initialized from the main thread" );
+
+ wxAppConsole * const app = wxAppConsole::GetInstance();
+ wxCHECK_RET( app, "sockets can't be initialized without wxApp" );
+
+ ms_manager = app->GetTraits()->GetSocketManager();
}
-wxSocketBase::~wxSocketBase()
+// ==========================================================================
+// wxSocketImpl
+// ==========================================================================
+
+wxSocketImpl::wxSocketImpl(wxSocketBase& wxsocket)
+ : m_wxsocket(&wxsocket)
{
- if (m_unread)
- free(m_unread);
+ m_fd = INVALID_SOCKET;
+ m_error = wxSOCKET_NOERROR;
+ m_server = false;
+ m_stream = true;
+
+ SetTimeout(wxsocket.GetTimeout() * 1000);
+
+ m_establishing = false;
+ m_reusable = false;
+ m_broadcast = false;
+ m_dobind = true;
+ m_initialRecvBufferSize = -1;
+ m_initialSendBufferSize = -1;
+}
- // Shutdown and close the socket
- Close();
+wxSocketImpl::~wxSocketImpl()
+{
+ if ( m_fd != INVALID_SOCKET )
+ Shutdown();
+}
- // Destroy the GSocket object
- if (m_socket)
- GSocket_destroy(m_socket);
+bool wxSocketImpl::PreCreateCheck(const wxSockAddressImpl& addr)
+{
+ if ( m_fd != INVALID_SOCKET )
+ {
+ m_error = wxSOCKET_INVSOCK;
+ return false;
+ }
+
+ if ( !addr.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return false;
+ }
+
+ return true;
}
-bool wxSocketBase::Close()
+void wxSocketImpl::PostCreation()
{
- if (m_socket)
- {
- // Disable callbacks
- GSocket_UnsetCallback(m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
- GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG);
+ // FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option
+#ifdef SO_NOSIGPIPE
+ EnableSocketOption(SO_NOSIGPIPE);
+#endif
+
+ if ( m_reusable )
+ EnableSocketOption(SO_REUSEADDR);
+
+ if ( m_broadcast )
+ {
+ wxASSERT_MSG( !m_stream, "broadcasting is for datagram sockets only" );
- // Shutdown the connection
- GSocket_Shutdown(m_socket);
- m_connected = FALSE;
- m_establishing = FALSE;
- }
+ EnableSocketOption(SO_BROADCAST);
+ }
+
+ if ( m_initialRecvBufferSize >= 0 )
+ SetSocketOption(SO_RCVBUF, m_initialRecvBufferSize);
+ if ( m_initialSendBufferSize >= 0 )
+ SetSocketOption(SO_SNDBUF, m_initialSendBufferSize);
- return TRUE;
+ // we always put our sockets in unblocked mode and handle blocking
+ // ourselves in DoRead/Write() if wxSOCKET_WAITALL is specified
+ UnblockAndRegisterWithEventLoop();
}
-// --------------------------------------------------------------
-// wxSocketBase basic IO operations
-// --------------------------------------------------------------
+wxSocketError wxSocketImpl::UpdateLocalAddress()
+{
+ if ( !m_local.IsOk() )
+ {
+ // ensure that we have a valid object using the correct family: correct
+ // being the same one as our peer uses as we have no other way to
+ // determine it
+ m_local.Create(m_peer.GetFamily());
+ }
-// GRG: I have made some changes to wxSocket internal event
-// system; now, all events (INPUT, OUTPUT, CONNECTION, LOST)
-// are always internally monitored; but users will only be
-// notified of these events they are interested in. So we
-// no longer have to change the event mask with SetNotify()
-// in internal functions like DeferRead, DeferWrite, and
-// the like. This solves a lot of problems.
+ WX_SOCKLEN_T lenAddr = m_local.GetLen();
+ if ( getsockname(m_fd, m_local.GetWritableAddr(), &lenAddr) != 0 )
+ {
+ Close();
+ m_error = wxSOCKET_IOERR;
+ return m_error;
+ }
-// GRG: I added m_error handling to IO operations. Now,
-// wxSocketBase::Error() correctly indicates if the last
-// operation from {Read, Write, ReadMsg, WriteMsg, Peek,
-// Unread, Discard} failed. Note that now, every function
-// that updates m_lcount, also updates m_error. While I
-// was at it, also fixed an UGLY bug in ReadMsg.
+ return wxSOCKET_NOERROR;
+}
-class _wxSocketInternalTimer: public wxTimer
+wxSocketError wxSocketImpl::CreateServer()
{
-public:
- int *m_state;
- unsigned long m_new_val;
+ if ( !PreCreateCheck(m_local) )
+ return m_error;
- void Notify()
- {
- *m_state = m_new_val; // Change the value
- }
-};
+ m_server = true;
+ m_stream = true;
+
+ // do create the socket
+ m_fd = socket(m_local.GetFamily(), SOCK_STREAM, 0);
-int wxSocketBase::DeferRead(char *buffer, wxUint32 nbytes)
+ if ( m_fd == INVALID_SOCKET )
+ {
+ m_error = wxSOCKET_IOERR;
+ return wxSOCKET_IOERR;
+ }
+
+ PostCreation();
+
+ // and then bind to and listen on it
+ //
+ // FIXME: should we test for m_dobind here?
+ if ( bind(m_fd, m_local.GetAddr(), m_local.GetLen()) != 0 )
+ m_error = wxSOCKET_IOERR;
+
+ if ( IsOk() )
+ {
+ if ( listen(m_fd, 5) != 0 )
+ m_error = wxSOCKET_IOERR;
+ }
+
+ if ( !IsOk() )
+ {
+ Close();
+ return m_error;
+ }
+
+ // finally retrieve the address we effectively bound to
+ return UpdateLocalAddress();
+}
+
+wxSocketError wxSocketImpl::CreateClient(bool wait)
{
- // Timer for timeout
- _wxSocketInternalTimer timer;
+ if ( !PreCreateCheck(m_peer) )
+ return m_error;
+
+ m_fd = socket(m_peer.GetFamily(), SOCK_STREAM, 0);
+
+ if ( m_fd == INVALID_SOCKET )
+ {
+ m_error = wxSOCKET_IOERR;
+ return wxSOCKET_IOERR;
+ }
+
+ PostCreation();
+
+ // If a local address has been set, then bind to it before calling connect
+ if ( m_local.IsOk() )
+ {
+ if ( bind(m_fd, m_local.GetAddr(), m_local.GetLen()) != 0 )
+ {
+ Close();
+ m_error = wxSOCKET_IOERR;
+ return m_error;
+ }
+ }
- wxASSERT(m_defering == NO_DEFER);
+ // Do connect now
+ int rc = connect(m_fd, m_peer.GetAddr(), m_peer.GetLen());
+ if ( rc == SOCKET_ERROR )
+ {
+ wxSocketError err = GetLastError();
+ if ( err == wxSOCKET_WOULDBLOCK )
+ {
+ m_establishing = true;
+
+ // block waiting for connection if we should (otherwise just return
+ // wxSOCKET_WOULDBLOCK to the caller)
+ if ( wait )
+ {
+ err = SelectWithTimeout(wxSOCKET_CONNECTION_FLAG)
+ ? wxSOCKET_NOERROR
+ : wxSOCKET_TIMEDOUT;
+ m_establishing = false;
+ }
+ }
+
+ m_error = err;
+ }
+ else // connected
+ {
+ m_error = wxSOCKET_NOERROR;
+ }
- // Set the defering mode to READ.
- m_defering = DEFER_READ;
+ return m_error;
+}
- // Set the current buffer.
- m_defer_buffer = buffer;
- m_defer_nbytes = nbytes;
- m_defer_timer = &timer;
- timer.m_state = (int *)&m_defer_buffer;
- timer.m_new_val = 0;
+wxSocketError wxSocketImpl::CreateUDP()
+{
+ if ( !PreCreateCheck(m_local) )
+ return m_error;
- timer.Start(m_timeout * 1000, FALSE);
+ m_stream = false;
+ m_server = false;
- // If the socket is readable, call DoDefer for the first time
- if (GSocket_Select(m_socket, GSOCK_INPUT_FLAG))
- DoDefer();
+ m_fd = socket(m_local.GetFamily(), SOCK_DGRAM, 0);
- // Wait for buffer completion.
- while (m_defer_buffer != NULL)
- wxYield();
+ if ( m_fd == INVALID_SOCKET )
+ {
+ m_error = wxSOCKET_IOERR;
+ return wxSOCKET_IOERR;
+ }
- timer.Stop();
+ PostCreation();
- // Disable defering mode.
- m_defering = NO_DEFER;
- m_defer_timer = NULL;
+ if ( m_dobind )
+ {
+ if ( bind(m_fd, m_local.GetAddr(), m_local.GetLen()) != 0 )
+ {
+ Close();
+ m_error = wxSOCKET_IOERR;
+ return m_error;
+ }
+
+ return UpdateLocalAddress();
+ }
- // Return the number of bytes read from the socket.
- return nbytes-m_defer_nbytes;
+ return wxSOCKET_NOERROR;
}
-wxSocketBase& wxSocketBase::Read(char* buffer, wxUint32 nbytes)
+wxSocketImpl *wxSocketImpl::Accept(wxSocketBase& wxsocket)
{
- int ret = 1;
+ wxSockAddressStorage from;
+ WX_SOCKLEN_T fromlen = sizeof(from);
+ const wxSOCKET_T fd = accept(m_fd, &from.addr, &fromlen);
- m_error = FALSE;
+ // accepting is similar to reading in the sense that it resets "ready for
+ // read" flag on the socket
+ ReenableEvents(wxSOCKET_INPUT_FLAG);
- // we try this even if the connection has already been closed.
- m_lcount = GetPushback(buffer, nbytes, FALSE);
- nbytes -= m_lcount;
- buffer += m_lcount;
+ if ( fd == INVALID_SOCKET )
+ return NULL;
- if (!m_connected || !m_socket)
- {
- // if no data retrieved AND not connected, it is an error.
- if (!m_lcount)
- m_error = TRUE;
+ wxSocketManager * const manager = wxSocketManager::Get();
+ if ( !manager )
+ return NULL;
- return *this;
- }
+ wxSocketImpl * const sock = manager->CreateSocket(wxsocket);
+ if ( !sock )
+ return NULL;
- // If we have got the whole needed buffer, return immediately
- if (!nbytes)
- return *this;
+ sock->m_fd = fd;
+ sock->m_peer = wxSockAddressImpl(from.addr, fromlen);
- // Possible combinations (they are checked in this order)
- // NOWAIT
- // SPEED | WAITALL
- // SPEED
- // WAITALL
- // NONE
- //
- if (m_flags & NOWAIT) // NOWAIT
- {
- GSocket_SetNonBlocking(m_socket, TRUE);
- ret = GSocket_Read(m_socket, buffer, nbytes);
- GSocket_SetNonBlocking(m_socket, FALSE);
-
- if (ret > 0)
- m_lcount += ret;
- }
- else if (m_flags & SPEED & WAITALL) // SPEED, WAITALL
- {
- while (ret > 0 && nbytes > 0)
- {
- ret = GSocket_Read(m_socket, buffer, nbytes);
- m_lcount += ret;
- buffer += ret;
- nbytes -= ret;
- }
- // In case the last call was an error ...
- if (ret < 0)
- m_lcount ++;
- }
- else if (m_flags & SPEED) // SPEED, !WAITALL
- {
- ret = GSocket_Read(m_socket, buffer, nbytes);
-
- if (ret > 0)
- m_lcount += ret;
- }
- else // NONE or WAITALL
- {
- ret = DeferRead(buffer, nbytes);
-
- if (ret > 0)
- m_lcount += ret;
- }
-
- // If we have read some data, then it is not an error, even
- // when in WAITALL mode, the last low-level IO call might
- // have failed.
- if (!m_lcount)
- m_error = TRUE;
-
- return *this;
-}
-
-wxSocketBase& wxSocketBase::ReadMsg(char* buffer, wxUint32 nbytes)
-{
-#define MAX_BUFSIZE (10 * 1024)
-
- int old_flags;
- unsigned long len, len2, sig;
- struct
- {
- char sig[4];
- char len[4];
- } msg;
-
- // sig should be an explicit 32-bit unsigned integer; I've seen
- // compilers in which wxUint32 was actually a 16-bit unsigned integer
-
- old_flags = m_flags;
- SetFlags(old_flags | WAITALL);
-
- Read((char *)&msg, sizeof(msg));
- if (m_lcount != sizeof(msg))
- {
- SetFlags(old_flags);
- m_error = TRUE;
- return *this;
- }
-
- sig = msg.sig[0] & 0xff;
- sig |= (wxUint32)(msg.sig[1] & 0xff) << 8;
- sig |= (wxUint32)(msg.sig[2] & 0xff) << 16;
- sig |= (wxUint32)(msg.sig[3] & 0xff) << 24;
-
- if (sig != 0xfeeddead)
- {
- wxLogDebug(_T("Warning: invalid signature returned to ReadMsg\n"));
- SetFlags(old_flags);
- m_error = TRUE;
- return *this;
- }
-
- len = msg.len[0] & 0xff;
- len |= (wxUint32)(msg.len[1] & 0xff) << 8;
- len |= (wxUint32)(msg.len[2] & 0xff) << 16;
- len |= (wxUint32)(msg.len[3] & 0xff) << 24;
-
- if (len > nbytes)
- {
- len2 = len - nbytes;
- len = nbytes;
- }
- else
- len2 = 0;
-
- // The "len &&" in the following statements is necessary so
- // that we don't attempt to read (and possibly hang the system)
- // if the message was zero bytes long
- if (len && Read(buffer, len).LastCount() != len)
- {
- SetFlags(old_flags);
- m_error = TRUE;
- return *this;
- }
- if (len2)
- {
- char *discard_buffer = new char[MAX_BUFSIZE];
- long discard_len;
+ sock->UnblockAndRegisterWithEventLoop();
- do
+ return sock;
+}
+
+
+void wxSocketImpl::Close()
+{
+ if ( m_fd != INVALID_SOCKET )
{
- discard_len = ((len2 > MAX_BUFSIZE)? MAX_BUFSIZE : len2);
- discard_len = Read(discard_buffer, discard_len).LastCount();
- len2 -= discard_len;
+ DoClose();
+ m_fd = INVALID_SOCKET;
}
- while ((discard_len > 0) && len2);
-
- delete [] discard_buffer;
+}
- if (len2 != 0)
+void wxSocketImpl::Shutdown()
+{
+ if ( m_fd != INVALID_SOCKET )
{
- SetFlags(old_flags);
- m_error = TRUE;
- return *this;
+ shutdown(m_fd, 1 /* SD_SEND */);
+ Close();
}
- }
- if (Read((char *)&msg, sizeof(msg)).LastCount() != sizeof(msg))
- {
- SetFlags(old_flags);
- m_error = TRUE;
- return *this;
- }
+}
- sig = msg.sig[0] & 0xff;
- sig |= (wxUint32)(msg.sig[1] & 0xff) << 8;
- sig |= (wxUint32)(msg.sig[2] & 0xff) << 16;
- sig |= (wxUint32)(msg.sig[3] & 0xff) << 24;
+/*
+ * Sets the timeout for blocking calls. Time is expressed in
+ * milliseconds.
+ */
+void wxSocketImpl::SetTimeout(unsigned long millis)
+{
+ SetTimeValFromMS(m_timeout, millis);
+}
- if (sig != 0xdeadfeed)
- {
- m_error = TRUE;
- wxLogDebug(_T("Warning: invalid signature returned to ReadMsg\n"));
- }
+void wxSocketImpl::NotifyOnStateChange(wxSocketNotify event)
+{
+ m_wxsocket->OnRequest(event);
+}
- SetFlags(old_flags);
- return *this;
+/* Address handling */
+wxSocketError wxSocketImpl::SetLocal(const wxSockAddressImpl& local)
+{
+ /* the socket must be initialized, or it must be a server */
+ if (m_fd != INVALID_SOCKET && !m_server)
+ {
+ m_error = wxSOCKET_INVSOCK;
+ return wxSOCKET_INVSOCK;
+ }
-#undef MAX_BUFSIZE
+ if ( !local.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return wxSOCKET_INVADDR;
+ }
+
+ m_local = local;
+
+ return wxSOCKET_NOERROR;
}
-wxSocketBase& wxSocketBase::Peek(char* buffer, wxUint32 nbytes)
+wxSocketError wxSocketImpl::SetPeer(const wxSockAddressImpl& peer)
{
- Read(buffer, nbytes);
- CreatePushbackAfter(buffer, nbytes);
+ if ( !peer.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return wxSOCKET_INVADDR;
+ }
+
+ m_peer = peer;
- return *this;
+ return wxSOCKET_NOERROR;
}
-int wxSocketBase::DeferWrite(const char *buffer, wxUint32 nbytes)
+const wxSockAddressImpl& wxSocketImpl::GetLocal()
{
- // Timer for timeout
- _wxSocketInternalTimer timer;
+ if ( !m_local.IsOk() )
+ UpdateLocalAddress();
- wxASSERT(m_defering == NO_DEFER);
+ return m_local;
+}
- m_defering = DEFER_WRITE;
+// ----------------------------------------------------------------------------
+// wxSocketImpl IO
+// ----------------------------------------------------------------------------
+
+// this macro wraps the given expression (normally a syscall) in a loop which
+// ignores any interruptions, i.e. reevaluates it again if it failed and errno
+// is EINTR
+#ifdef __UNIX__
+ #define DO_WHILE_EINTR( rc, syscall ) \
+ do { \
+ rc = (syscall); \
+ } \
+ while ( rc == -1 && errno == EINTR )
+#else
+ #define DO_WHILE_EINTR( rc, syscall ) rc = (syscall)
+#endif
- // Set the current buffer
- m_defer_buffer = (char *)buffer;
- m_defer_nbytes = nbytes;
- m_defer_timer = &timer;
+int wxSocketImpl::RecvStream(void *buffer, int size)
+{
+ int ret;
+ DO_WHILE_EINTR( ret, recv(m_fd, static_cast<char *>(buffer), size, 0) );
- // Start timer
- timer.m_state = (int *)&m_defer_buffer;
- timer.m_new_val = 0;
+ if ( !ret )
+ {
+ // receiving 0 bytes for a TCP socket indicates that the connection was
+ // closed by peer so shut down our end as well (for UDP sockets empty
+ // datagrams are also possible)
+ m_establishing = false;
+ NotifyOnStateChange(wxSOCKET_LOST);
- timer.Start(m_timeout * 1000, FALSE);
+ Shutdown();
- // If the socket is writable, call DoDefer for the first time
- if (GSocket_Select(m_socket, GSOCK_OUTPUT_FLAG))
- DoDefer();
+ // do not return an error in this case however
+ }
- // Wait for buffer completion.
- while (m_defer_buffer != NULL)
- wxYield();
+ return ret;
+}
- // Stop timer
- m_defer_timer = NULL;
- timer.Stop();
+int wxSocketImpl::SendStream(const void *buffer, int size)
+{
+#ifdef wxNEEDS_IGNORE_SIGPIPE
+ IgnoreSignal ignore(SIGPIPE);
+#endif
- m_defering = NO_DEFER;
+ int ret;
+ DO_WHILE_EINTR( ret, send(m_fd, static_cast<const char *>(buffer), size,
+ wxSOCKET_MSG_NOSIGNAL) );
- return nbytes-m_defer_nbytes;
+ return ret;
}
-wxSocketBase& wxSocketBase::Write(const char *buffer, wxUint32 nbytes)
+int wxSocketImpl::RecvDgram(void *buffer, int size)
{
- int ret = 1;
+ wxSockAddressStorage from;
+ WX_SOCKLEN_T fromlen = sizeof(from);
- m_lcount = 0;
- m_error = FALSE;
+ int ret;
+ DO_WHILE_EINTR( ret, recvfrom(m_fd, static_cast<char *>(buffer), size,
+ 0, &from.addr, &fromlen) );
- if (!m_connected || !m_socket)
- {
- m_error = TRUE;
- return *this;
- }
-
- // Possible combinations (they are checked in this order)
- // NOWAIT
- // SPEED | WAITALL
- // SPEED
- // WAITALL
- // NONE
- //
- if (m_flags & NOWAIT) // NOWAIT
- {
- GSocket_SetNonBlocking(m_socket, TRUE);
- ret = GSocket_Write(m_socket, buffer, nbytes);
- GSocket_SetNonBlocking(m_socket, FALSE);
-
- if (ret > 0)
- m_lcount += ret;
- }
- else if (m_flags & SPEED & WAITALL) // SPEED, WAITALL
- {
- while (ret > 0 && nbytes > 0)
- {
- ret = GSocket_Write(m_socket, buffer, nbytes);
- m_lcount += ret;
- buffer += ret;
- nbytes -= ret;
- }
- // In case the last call was an error ...
- if (ret < 0)
- m_lcount ++;
- }
- else if (m_flags & SPEED) // SPEED, !WAITALL
- {
- ret = GSocket_Write(m_socket, buffer, nbytes);
-
- if (ret > 0)
- m_lcount += ret;
- }
- else // NONE or WAITALL
- {
- ret = DeferWrite(buffer, nbytes);
-
- if (ret > 0)
- m_lcount += ret;
- }
-
- // If we have written some data, then it is not an error,
- // even when in WAITALL mode, the last low-level IO call
- // might have failed.
- if (!m_lcount)
- m_error = TRUE;
-
- return *this;
-}
-
-wxSocketBase& wxSocketBase::WriteMsg(const char *buffer, wxUint32 nbytes)
-{
- int old_flags;
- struct {
- char sig[4];
- char len[4];
- } msg;
-
- // warning about 'cast truncates constant value'
-#ifdef __VISUALC__
- #pragma warning(disable: 4310)
-#endif // __VISUALC__
-
- msg.sig[0] = (char) 0xad;
- msg.sig[1] = (char) 0xde;
- msg.sig[2] = (char) 0xed;
- msg.sig[3] = (char) 0xfe;
-
- msg.len[0] = (char) nbytes & 0xff;
- msg.len[1] = (char) (nbytes >> 8) & 0xff;
- msg.len[2] = (char) (nbytes >> 16) & 0xff;
- msg.len[3] = (char) (nbytes >> 24) & 0xff;
-
- old_flags = m_flags;
- SetFlags(old_flags | WAITALL);
-
- if (Write((char *)&msg, sizeof(msg)).LastCount() < sizeof(msg))
- {
- SetFlags(old_flags);
- m_error = TRUE;
- return *this;
- }
- if (Write(buffer, nbytes).LastCount() < nbytes)
- {
- SetFlags(old_flags);
- m_error = TRUE;
- return *this;
- }
+ if ( ret == SOCKET_ERROR )
+ return SOCKET_ERROR;
- msg.sig[0] = (char) 0xed;
- msg.sig[1] = (char) 0xfe;
- msg.sig[2] = (char) 0xad;
- msg.sig[3] = (char) 0xde;
- msg.len[0] = msg.len[1] = msg.len[2] = msg.len[3] = (char) 0;
+ m_peer = wxSockAddressImpl(from.addr, fromlen);
+ if ( !m_peer.IsOk() )
+ return -1;
+
+ return ret;
+}
- if (Write((char *)&msg, sizeof(msg)).LastCount() < sizeof(msg))
- m_error = TRUE;
+int wxSocketImpl::SendDgram(const void *buffer, int size)
+{
+ if ( !m_peer.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return -1;
+ }
- SetFlags(old_flags);
- return *this;
+ int ret;
+ DO_WHILE_EINTR( ret, sendto(m_fd, static_cast<const char *>(buffer), size,
+ 0, m_peer.GetAddr(), m_peer.GetLen()) );
-#ifdef __VISUALC__
- #pragma warning(default: 4310)
-#endif // __VISUALC__
+ return ret;
}
-wxSocketBase& wxSocketBase::Unread(const char *buffer, wxUint32 nbytes)
+int wxSocketImpl::Read(void *buffer, int size)
{
- m_error = FALSE;
- m_lcount = 0;
+ // server sockets can't be used for IO, only to accept new connections
+ if ( m_fd == INVALID_SOCKET || m_server )
+ {
+ m_error = wxSOCKET_INVSOCK;
+ return -1;
+ }
- if (nbytes != 0)
- {
- CreatePushbackAfter(buffer, nbytes);
- m_lcount = nbytes;
- }
- return *this;
+ int ret = m_stream ? RecvStream(buffer, size)
+ : RecvDgram(buffer, size);
+
+ m_error = ret == SOCKET_ERROR ? GetLastError() : wxSOCKET_NOERROR;
+
+ return ret;
}
-bool wxSocketBase::IsData() const
+int wxSocketImpl::Write(const void *buffer, int size)
{
- if (!m_socket)
- return FALSE;
+ if ( m_fd == INVALID_SOCKET || m_server )
+ {
+ m_error = wxSOCKET_INVSOCK;
+ return -1;
+ }
+
+ int ret = m_stream ? SendStream(buffer, size)
+ : SendDgram(buffer, size);
- return (GSocket_Select(m_socket, GSOCK_INPUT_FLAG));
+ m_error = ret == SOCKET_ERROR ? GetLastError() : wxSOCKET_NOERROR;
+
+ return ret;
}
-// GRG: DoDefer() no longer needs to know which event occured,
-// because this was only used to catch LOST events and set
-// m_defer_buffer = NULL; this is done in OnRequest() now.
+// ==========================================================================
+// wxSocketBase
+// ==========================================================================
+
+// --------------------------------------------------------------------------
+// Initialization and shutdown
+// --------------------------------------------------------------------------
-void wxSocketBase::DoDefer()
+namespace
{
- int ret;
- if (!m_defer_buffer)
- return;
+// counts the number of calls to Initialize() minus the number of calls to
+// Shutdown(): we don't really need it any more but it was documented that
+// Shutdown() must be called the same number of times as Initialize() and using
+// a counter helps us to check it
+int gs_socketInitCount = 0;
- switch (m_defering)
- {
- case DEFER_READ:
- ret = GSocket_Read(m_socket, m_defer_buffer, m_defer_nbytes);
- break;
- case DEFER_WRITE:
- ret = GSocket_Write(m_socket, m_defer_buffer, m_defer_nbytes);
- break;
- default:
- ret = -1;
- break;
- }
+} // anonymous namespace
- if (ret >= 0)
- m_defer_nbytes -= ret;
+bool wxSocketBase::IsInitialized()
+{
+ wxASSERT_MSG( wxIsMainThread(), "unsafe to call from other threads" );
- // If we are waiting for all bytes to be acquired, keep the defering
- // mode enabled.
- if ((m_flags & WAITALL) == 0 || m_defer_nbytes == 0 || ret < 0)
- {
- m_defer_buffer = NULL;
- }
- else
- {
- m_defer_buffer += ret;
- m_defer_timer->Start(m_timeout * 1000, FALSE);
- }
+ return gs_socketInitCount != 0;
}
-void wxSocketBase::Discard()
+bool wxSocketBase::Initialize()
{
-#define MAX_BUFSIZE (10*1024)
+ wxCHECK_MSG( wxIsMainThread(), false,
+ "must be called from the main thread" );
+
+ if ( !gs_socketInitCount )
+ {
+ wxSocketManager * const manager = wxSocketManager::Get();
+ if ( !manager || !manager->OnInit() )
+ return false;
+ }
- char *my_data = new char[MAX_BUFSIZE];
- wxUint32 recv_size = MAX_BUFSIZE;
- wxUint32 total = 0;
+ gs_socketInitCount++;
- SaveState();
- SetFlags(NOWAIT); // GRG: SPEED was not needed here!
+ return true;
+}
- while (recv_size == MAX_BUFSIZE)
- {
- recv_size = Read(my_data, MAX_BUFSIZE).LastCount();
- total += recv_size;
- }
+void wxSocketBase::Shutdown()
+{
+ wxCHECK_RET( wxIsMainThread(), "must be called from the main thread" );
- RestoreState();
- delete [] my_data;
+ wxCHECK_RET( gs_socketInitCount > 0, "too many calls to Shutdown()" );
- m_lcount = total;
- m_error = FALSE;
+ if ( !--gs_socketInitCount )
+ {
+ wxSocketManager * const manager = wxSocketManager::Get();
+ wxCHECK_RET( manager, "should have a socket manager" );
-#undef MAX_BUFSIZE
+ manager->OnExit();
+ }
}
-// --------------------------------------------------------------
-// wxSocketBase get local or peer addresses
-// --------------------------------------------------------------
+// --------------------------------------------------------------------------
+// Ctor and dtor
+// --------------------------------------------------------------------------
+
+void wxSocketBase::Init()
+{
+ m_impl = NULL;
+ m_type = wxSOCKET_UNINIT;
+
+ // state
+ m_flags = 0;
+ m_connected =
+ m_establishing =
+ m_reading =
+ m_writing =
+ m_closed = false;
+ m_lcount = 0;
+ m_lcount_read = 0;
+ m_lcount_write = 0;
+ m_timeout = 600;
+ m_beingDeleted = false;
+
+ // pushback buffer
+ m_unread = NULL;
+ m_unrd_size = 0;
+ m_unrd_cur = 0;
+
+ // events
+ m_id = wxID_ANY;
+ m_handler = NULL;
+ m_clientData = NULL;
+ m_notify = false;
+ m_eventmask =
+ m_eventsgot = 0;
+
+ // when we create the first socket in the main thread we initialize the
+ // OS-dependent socket stuff: notice that this means that the user code
+ // needs to call wxSocket::Initialize() itself if the first socket it
+ // creates is not created in the main thread
+ if ( wxIsMainThread() )
+ {
+ if ( !Initialize() )
+ {
+ wxLogError(_("Cannot initialize sockets"));
+ }
+ }
+}
+
+wxSocketBase::wxSocketBase()
+{
+ Init();
+}
-bool wxSocketBase::GetPeer(wxSockAddress& addr_man) const
+wxSocketBase::wxSocketBase(wxSocketFlags flags, wxSocketType type)
{
- GAddress *peer;
+ Init();
- if (!m_socket)
- return FALSE;
+ SetFlags(flags);
- peer = GSocket_GetPeer(m_socket);
- addr_man.SetAddress(peer);
- GAddress_destroy(peer);
+ m_type = type;
+}
+
+wxSocketBase::~wxSocketBase()
+{
+ // Shutdown and close the socket
+ if (!m_beingDeleted)
+ Close();
- return TRUE;
+ // Destroy the implementation object
+ delete m_impl;
+
+ // Free the pushback buffer
+ free(m_unread);
}
-bool wxSocketBase::GetLocal(wxSockAddress& addr_man) const
+bool wxSocketBase::Destroy()
{
- GAddress *local;
+ // 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;
- if (!m_socket)
- return FALSE;
+ // Shutdown and close the socket
+ Close();
- local = GSocket_GetLocal(m_socket);
- addr_man.SetAddress(local);
- GAddress_destroy(local);
+ // Suppress events from now on
+ Notify(false);
- return TRUE;
+ // Schedule this object for deletion instead of destroying it right now if
+ // it can have other events pending for it and we have a way to do it.
+ //
+ // Notice that sockets used in other threads won't have any events for them
+ // and we shouldn't use delayed destruction mechanism for them as it's not
+ // MT-safe.
+ if ( wxIsMainThread() && wxTheApp )
+ {
+ wxTheApp->ScheduleForDestruction(this);
+ }
+ else // no app
+ {
+ // in wxBase we might have no app object at all, don't leak memory
+ delete this;
+ }
+
+ return true;
}
-// --------------------------------------------------------------
-// wxSocketBase save and restore socket state
-// --------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// simple accessors
+// ----------------------------------------------------------------------------
-void wxSocketBase::SaveState()
+void wxSocketBase::SetError(wxSocketError error)
+{
+ m_impl->m_error = error;
+}
+
+wxSocketError wxSocketBase::LastError() const
{
- wxSocketState *state;
+ return m_impl->GetError();
+}
+
+// --------------------------------------------------------------------------
+// Basic IO calls
+// --------------------------------------------------------------------------
- state = new wxSocketState();
+// The following IO operations update m_lcount:
+// {Read, Write, ReadMsg, WriteMsg, Peek, Unread, Discard}
+bool wxSocketBase::Close()
+{
+ // Interrupt pending waits
+ InterruptWait();
- state->notify_state = m_notify_state;
- state->evt_notify_state = m_neededreq;
- state->socket_flags = m_flags;
- state->c_callback = m_cbk;
- state->c_callback_data = m_cdata;
+ ShutdownOutput();
- m_states.Append(state);
+ m_connected = false;
+ m_establishing = false;
+ return true;
}
-void wxSocketBase::RestoreState()
+void wxSocketBase::ShutdownOutput()
{
- wxNode *node;
- wxSocketState *state;
+ if ( m_impl )
+ m_impl->Shutdown();
+}
+
+wxSocketBase& wxSocketBase::Read(void* buffer, wxUint32 nbytes)
+{
+ wxSocketReadGuard read(this);
- node = m_states.Last();
- if (!node)
- return;
+ m_lcount_read = DoRead(buffer, nbytes);
+ m_lcount = m_lcount_read;
- state = (wxSocketState *)node->Data();
+ return *this;
+}
+
+wxUint32 wxSocketBase::DoRead(void* buffer_, wxUint32 nbytes)
+{
+ wxCHECK_MSG( m_impl, 0, "socket must be valid" );
- SetFlags(state->socket_flags);
- m_neededreq = state->evt_notify_state;
- m_cbk = state->c_callback;
- m_cdata = state->c_callback_data;
- Notify(state->notify_state);
+ // We use pointer arithmetic here which doesn't work with void pointers.
+ char *buffer = static_cast<char *>(buffer_);
+ wxCHECK_MSG( buffer, 0, "NULL buffer" );
- delete node;
- delete state;
+ // Try the push back buffer first, even before checking whether the socket
+ // is valid to allow reading previously pushed back data from an already
+ // closed socket.
+ wxUint32 total = GetPushback(buffer, nbytes, false);
+ nbytes -= total;
+ buffer += total;
+
+ while ( nbytes )
+ {
+ // our socket is non-blocking so Read() will return immediately if
+ // there is nothing to read yet and it's more efficient to try it first
+ // before entering DoWait() which is going to start dispatching GUI
+ // events and, even more importantly, we must do this under Windows
+ // where we're not going to get notifications about socket being ready
+ // for reading before we read all the existing data from it
+ const int ret = !m_impl->m_stream || m_connected
+ ? m_impl->Read(buffer, nbytes)
+ : 0;
+ if ( ret == -1 )
+ {
+ if ( m_impl->GetLastError() == wxSOCKET_WOULDBLOCK )
+ {
+ // if we don't want to wait, just return immediately
+ if ( m_flags & wxSOCKET_NOWAIT_READ )
+ {
+ // this shouldn't be counted as an error in this case
+ SetError(wxSOCKET_NOERROR);
+ break;
+ }
+
+ // otherwise wait until the socket becomes ready for reading or
+ // an error occurs on it
+ if ( !DoWaitWithTimeout(wxSOCKET_INPUT_FLAG) )
+ {
+ // and exit if the timeout elapsed before it did
+ SetError(wxSOCKET_TIMEDOUT);
+ break;
+ }
+
+ // retry reading
+ continue;
+ }
+ else // "real" error
+ {
+ SetError(wxSOCKET_IOERR);
+ break;
+ }
+ }
+ else if ( ret == 0 )
+ {
+ // for connection-oriented (e.g. TCP) sockets we can only read
+ // 0 bytes if the other end has been closed, and for connectionless
+ // ones (UDP) this flag doesn't make sense anyhow so we can set it
+ // to true too without doing any harm
+ m_closed = true;
+
+ // we're not going to read anything else and so if we haven't read
+ // anything (or not everything in wxSOCKET_WAITALL case) already,
+ // signal an error
+ if ( (m_flags & wxSOCKET_WAITALL_READ) || !total )
+ SetError(wxSOCKET_IOERR);
+ break;
+ }
+
+ total += ret;
+
+ // if we are happy to read something and not the entire nbytes bytes,
+ // then we're done
+ if ( !(m_flags & wxSOCKET_WAITALL_READ) )
+ break;
+
+ nbytes -= ret;
+ buffer += ret;
+ }
+
+ return total;
}
+wxSocketBase& wxSocketBase::ReadMsg(void* buffer, wxUint32 nbytes)
+{
+ struct
+ {
+ unsigned char sig[4];
+ unsigned char len[4];
+ } msg;
+
+ wxSocketReadGuard read(this);
+
+ wxSocketWaitModeChanger changeFlags(this, wxSOCKET_WAITALL_READ);
-// --------------------------------------------------------------
-// wxSocketBase Wait functions
-// --------------------------------------------------------------
+ bool ok = false;
+ if ( DoRead(&msg, sizeof(msg)) == sizeof(msg) )
+ {
+ wxUint32 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 )
+ {
+ wxUint32 len = (wxUint32)msg.len[0];
+ len |= (wxUint32)(msg.len[1] << 8);
+ len |= (wxUint32)(msg.len[2] << 16);
+ len |= (wxUint32)(msg.len[3] << 24);
+
+ wxUint32 len2;
+ if (len > nbytes)
+ {
+ len2 = len - nbytes;
+ len = nbytes;
+ }
+ else
+ len2 = 0;
+
+ // Don't attempt to read if the msg was zero bytes long.
+ m_lcount_read = len ? DoRead(buffer, len) : 0;
+ m_lcount = m_lcount_read;
+
+ if ( len2 )
+ {
+ char discard_buffer[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 = DoRead(discard_buffer, (wxUint32)discard_len);
+ len2 -= (wxUint32)discard_len;
+ }
+ while ((discard_len > 0) && len2);
+ }
+
+ if ( !len2 && DoRead(&msg, sizeof(msg)) == sizeof(msg) )
+ {
+ 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 )
+ ok = true;
+ }
+ }
+ }
-// GRG: I have completely rewritten this family of functions
-// so that they don't depend on event notifications; instead,
-// they poll the socket, using GSocket_Select(), to check for
-// the specified combination of event flags, until an event
-// occurs or until the timeout ellapses. The polling loop
-// calls wxYield(), so this won't block the GUI.
+ if ( !ok )
+ SetError(wxSOCKET_IOERR);
+
+ return *this;
+}
-bool wxSocketBase::_Wait(long seconds, long milliseconds, wxSocketEventFlags flags)
+wxSocketBase& wxSocketBase::Peek(void* buffer, wxUint32 nbytes)
{
- GSocketEventFlags result;
- _wxSocketInternalTimer timer;
- long timeout;
- int state = -1;
+ wxSocketReadGuard read(this);
- // Check for valid socket
- if (!m_socket)
- return FALSE;
+ // Peek() should never block
+ wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT);
- // If it is not a server, it must be connected or establishing connection
- if ((m_type != SOCK_SERVER) && (!m_connected && !m_establishing))
- return FALSE;
+ m_lcount = DoRead(buffer, nbytes);
- // Check for valid timeout value
- if (seconds != -1)
- timeout = seconds * 1000 + milliseconds;
- else
- timeout = m_timeout * 1000;
+ Pushback(buffer, m_lcount);
- // Activate timer
- timer.m_state = &state;
- timer.m_new_val = 0;
- timer.Start(timeout, TRUE);
+ return *this;
+}
- // Active polling (without using events)
- //
- // NOTE: this duplicates some of the code in OnRequest (lost
- // connection and connection establishment handling) but this
- // doesn't hurt. It has to be here because the event might
- // be a bit delayed, and it has to be in OnRequest as well
- // because maybe the WaitXXX functions are not being used.
- //
- while (state == -1)
- {
- result = GSocket_Select(m_socket, flags | GSOCK_LOST_FLAG);
+wxSocketBase& wxSocketBase::Write(const void *buffer, wxUint32 nbytes)
+{
+ wxSocketWriteGuard write(this);
- // Connection lost
- if (result & GSOCK_LOST_FLAG)
+ m_lcount_write = DoWrite(buffer, nbytes);
+ m_lcount = m_lcount_write;
+
+ return *this;
+}
+
+// This function is a mirror image of DoRead() except that it doesn't use the
+// push back buffer and doesn't treat 0 return value specially (normally this
+// shouldn't happen at all here), so please see comments there for explanations
+wxUint32 wxSocketBase::DoWrite(const void *buffer_, wxUint32 nbytes)
+{
+ wxCHECK_MSG( m_impl, 0, "socket must be valid" );
+
+ const char *buffer = static_cast<const char *>(buffer_);
+ wxCHECK_MSG( buffer, 0, "NULL buffer" );
+
+ wxUint32 total = 0;
+ while ( nbytes )
{
- timer.Stop();
- m_defer_buffer = NULL;
- Close();
- return TRUE;
+ if ( m_impl->m_stream && !m_connected )
+ {
+ if ( (m_flags & wxSOCKET_WAITALL_WRITE) || !total )
+ SetError(wxSOCKET_IOERR);
+ break;
+ }
+
+ const int ret = m_impl->Write(buffer, nbytes);
+ if ( ret == -1 )
+ {
+ if ( m_impl->GetLastError() == wxSOCKET_WOULDBLOCK )
+ {
+ if ( m_flags & wxSOCKET_NOWAIT_WRITE )
+ break;
+
+ if ( !DoWaitWithTimeout(wxSOCKET_OUTPUT_FLAG) )
+ {
+ SetError(wxSOCKET_TIMEDOUT);
+ break;
+ }
+
+ continue;
+ }
+ else // "real" error
+ {
+ SetError(wxSOCKET_IOERR);
+ break;
+ }
+ }
+
+ total += ret;
+
+ if ( !(m_flags & wxSOCKET_WAITALL_WRITE) )
+ break;
+
+ nbytes -= ret;
+ buffer += ret;
}
- // Incoming connection (server) or connection established (client)
- if (result & GSOCK_CONNECTION_FLAG)
+ return total;
+}
+
+wxSocketBase& wxSocketBase::WriteMsg(const void *buffer, wxUint32 nbytes)
+{
+ struct
{
- timer.Stop();
- m_connected = TRUE;
- m_establishing = FALSE;
- return TRUE;
- }
+ unsigned char sig[4];
+ unsigned char len[4];
+ } msg;
+
+ wxSocketWriteGuard write(this);
+
+ wxSocketWaitModeChanger changeFlags(this, wxSOCKET_WAITALL_WRITE);
+
+ 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 we are in the middle of a deferred R/W, ignore these.
- if ((result & GSOCK_INPUT_FLAG) || (result & GSOCK_OUTPUT_FLAG))
+ bool ok = false;
+ if ( DoWrite(&msg, sizeof(msg)) == sizeof(msg) )
{
- if (m_defer_buffer == NULL)
- {
- timer.Stop();
- return TRUE;
- }
+ m_lcount_write = DoWrite(buffer, nbytes);
+ m_lcount = m_lcount_write;
+ if ( m_lcount_write == nbytes )
+ {
+ 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 ( DoWrite(&msg, sizeof(msg)) == sizeof(msg))
+ ok = true;
+ }
}
- wxYield();
- }
+ if ( !ok )
+ SetError(wxSOCKET_IOERR);
- timer.Stop();
- return FALSE;
+ return *this;
}
-bool wxSocketBase::Wait(long seconds, long milliseconds)
+wxSocketBase& wxSocketBase::Unread(const void *buffer, wxUint32 nbytes)
{
- return _Wait(seconds, milliseconds, GSOCK_INPUT_FLAG |
- GSOCK_OUTPUT_FLAG |
- GSOCK_CONNECTION_FLAG |
- GSOCK_LOST_FLAG);
+ if (nbytes != 0)
+ Pushback(buffer, nbytes);
+
+ SetError(wxSOCKET_NOERROR);
+ m_lcount = nbytes;
+
+ return *this;
}
-bool wxSocketBase::WaitForRead(long seconds, long milliseconds)
+wxSocketBase& wxSocketBase::Discard()
{
- return _Wait(seconds, milliseconds, GSOCK_INPUT_FLAG);
+ char *buffer = new char[MAX_DISCARD_SIZE];
+ wxUint32 ret;
+ wxUint32 total = 0;
+
+ wxSocketReadGuard read(this);
+
+ wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT);
+
+ do
+ {
+ ret = DoRead(buffer, MAX_DISCARD_SIZE);
+ total += ret;
+ }
+ while (ret == MAX_DISCARD_SIZE);
+
+ delete[] buffer;
+ m_lcount = total;
+ SetError(wxSOCKET_NOERROR);
+
+ return *this;
}
-bool wxSocketBase::WaitForWrite(long seconds, long milliseconds)
+// --------------------------------------------------------------------------
+// Wait functions
+// --------------------------------------------------------------------------
+
+/*
+ This function will check for the events specified in the flags parameter,
+ and it will return a mask indicating which operations can be performed.
+ */
+wxSocketEventFlags wxSocketImpl::Select(wxSocketEventFlags flags,
+ const timeval *timeout)
{
- return _Wait(seconds, milliseconds, GSOCK_OUTPUT_FLAG);
+ if ( m_fd == INVALID_SOCKET )
+ return (wxSOCKET_LOST_FLAG & flags);
+
+ struct timeval tv;
+ if ( timeout )
+ tv = *timeout;
+ else
+ tv.tv_sec = tv.tv_usec = 0;
+
+ // prepare the FD sets, passing NULL for the one(s) we don't use
+ fd_set
+ readfds, *preadfds = NULL,
+ writefds, *pwritefds = NULL,
+ exceptfds; // always want to know about errors
+
+ if ( flags & wxSOCKET_INPUT_FLAG )
+ preadfds = &readfds;
+
+ if ( flags & wxSOCKET_OUTPUT_FLAG )
+ pwritefds = &writefds;
+
+ // When using non-blocking connect() the client socket becomes connected
+ // (successfully or not) when it becomes writable but when using
+ // non-blocking accept() the server socket becomes connected when it
+ // becomes readable.
+ if ( flags & wxSOCKET_CONNECTION_FLAG )
+ {
+ if ( m_server )
+ preadfds = &readfds;
+ else
+ pwritefds = &writefds;
+ }
+
+ if ( preadfds )
+ {
+ wxFD_ZERO(preadfds);
+ wxFD_SET(m_fd, preadfds);
+ }
+
+ if ( pwritefds )
+ {
+ wxFD_ZERO(pwritefds);
+ wxFD_SET(m_fd, pwritefds);
+ }
+
+ wxFD_ZERO(&exceptfds);
+ wxFD_SET(m_fd, &exceptfds);
+
+ const int rc = select(m_fd + 1, preadfds, pwritefds, &exceptfds, &tv);
+
+ // check for errors first
+ if ( rc == -1 || wxFD_ISSET(m_fd, &exceptfds) )
+ {
+ m_establishing = false;
+
+ return wxSOCKET_LOST_FLAG & flags;
+ }
+
+ if ( rc == 0 )
+ return 0;
+
+ wxASSERT_MSG( rc == 1, "unexpected select() return value" );
+
+ wxSocketEventFlags detected = 0;
+ if ( preadfds && wxFD_ISSET(m_fd, preadfds) )
+ detected |= wxSOCKET_INPUT_FLAG;
+
+ if ( pwritefds && wxFD_ISSET(m_fd, pwritefds) )
+ {
+ // check for the case of non-blocking connect()
+ if ( m_establishing && !m_server )
+ {
+ int error;
+ SOCKOPTLEN_T len = sizeof(error);
+ m_establishing = false;
+ getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
+
+ if ( error )
+ detected = wxSOCKET_LOST_FLAG;
+ else
+ detected |= wxSOCKET_CONNECTION_FLAG;
+ }
+ else // not called to get non-blocking connect() status
+ {
+ detected |= wxSOCKET_OUTPUT_FLAG;
+ }
+ }
+
+ return detected & flags;
}
-bool wxSocketBase::WaitForLost(long seconds, long milliseconds)
+int
+wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags)
{
- return _Wait(seconds, milliseconds, GSOCK_LOST_FLAG);
+ // Use either the provided timeout or the default timeout value associated
+ // with this socket.
+ //
+ // TODO: allow waiting forever, see #9443
+ const long timeout = seconds == -1 ? m_timeout * 1000
+ : seconds * 1000 + milliseconds;
+
+ return DoWait(timeout, flags);
}
-void wxSocketBase::SetTimeout(long seconds)
+int
+wxSocketBase::DoWait(long timeout, wxSocketEventFlags flags)
{
- m_timeout = seconds;
+ wxCHECK_MSG( m_impl, -1, "can't wait on invalid socket" );
- if (m_socket)
- GSocket_SetTimeout(m_socket, m_timeout);
-}
+ // we're never going to become ready in a TCP client if we're not connected
+ // any more (OTOH a server can call this to precisely wait for a connection
+ // so do wait for it in this case and UDP client is never "connected")
+ if ( !m_impl->IsServer() &&
+ m_impl->m_stream && !m_connected && !m_establishing )
+ return -1;
+
+ // This can be set to true from Interrupt() to exit this function a.s.a.p.
+ m_interrupt = false;
-// --------------------------------------------------------------
-// wxSocketBase flags
-// --------------------------------------------------------------
-void wxSocketBase::SetFlags(wxSockFlags _flags)
+ const wxMilliClock_t timeEnd = wxGetLocalTimeMillis() + timeout;
+
+ // Get the active event loop which we'll use for the message dispatching
+ // when running in the main thread unless this was explicitly disabled by
+ // setting wxSOCKET_BLOCK flag
+ wxEventLoopBase *eventLoop;
+ if ( !(m_flags & wxSOCKET_BLOCK) && wxIsMainThread() )
+ {
+ eventLoop = wxEventLoop::GetActive();
+ }
+ else // in worker thread
+ {
+ // We never dispatch messages from threads other than the main one.
+ eventLoop = NULL;
+ }
+
+ // Make sure the events we're interested in are enabled before waiting for
+ // them: this is really necessary here as otherwise this could happen:
+ // 1. DoRead(wxSOCKET_WAITALL) is called
+ // 2. There is nothing to read so DoWait(wxSOCKET_INPUT_FLAG) is called
+ // 3. Some, but not all data appears, wxSocketImplUnix::OnReadWaiting()
+ // is called and wxSOCKET_INPUT_FLAG events are disabled in it
+ // 4. Because of wxSOCKET_WAITALL we call DoWait() again but the events
+ // are still disabled and we block forever
+ //
+ // More elegant solution would be nice but for now simply re-enabling the
+ // events here will do
+ m_impl->ReenableEvents(flags & (wxSOCKET_INPUT_FLAG | wxSOCKET_OUTPUT_FLAG));
+
+
+ // Wait until we receive the event we're waiting for or the timeout expires
+ // (but note that we always execute the loop at least once, even if timeout
+ // is 0 as this is used for polling)
+ int rc = 0;
+ for ( bool firstTime = true; !m_interrupt; firstTime = false )
+ {
+ long timeLeft = wxMilliClockToLong(timeEnd - wxGetLocalTimeMillis());
+ if ( timeLeft < 0 )
+ {
+ if ( !firstTime )
+ break; // timed out
+
+ timeLeft = 0;
+ }
+
+ wxSocketEventFlags events;
+ if ( eventLoop )
+ {
+ // reset them before starting to wait
+ m_eventsgot = 0;
+
+ eventLoop->DispatchTimeout(timeLeft);
+
+ events = m_eventsgot;
+ }
+ else // no event loop or waiting in another thread
+ {
+ // as explained below, we should always check for wxSOCKET_LOST_FLAG
+ timeval tv;
+ SetTimeValFromMS(tv, timeLeft);
+ events = m_impl->Select(flags | wxSOCKET_LOST_FLAG, &tv);
+ }
+
+ // always check for wxSOCKET_LOST_FLAG, even if flags doesn't include
+ // it, as continuing to wait for anything else after getting it is
+ // pointless
+ if ( events & wxSOCKET_LOST_FLAG )
+ {
+ m_connected = false;
+ m_establishing = false;
+ rc = -1;
+ break;
+ }
+
+ // otherwise mask out the bits we're not interested in
+ events &= flags;
+
+ // Incoming connection (server) or connection established (client)?
+ if ( events & wxSOCKET_CONNECTION_FLAG )
+ {
+ m_connected = true;
+ m_establishing = false;
+ rc = true;
+ break;
+ }
+
+ // Data available or output buffer ready?
+ if ( (events & wxSOCKET_INPUT_FLAG) || (events & wxSOCKET_OUTPUT_FLAG) )
+ {
+ rc = true;
+ break;
+ }
+ }
+
+ return rc;
+}
+
+bool wxSocketBase::Wait(long seconds, long milliseconds)
{
- m_flags = _flags;
+ return DoWait(seconds, milliseconds,
+ wxSOCKET_INPUT_FLAG |
+ wxSOCKET_OUTPUT_FLAG |
+ wxSOCKET_CONNECTION_FLAG) != 0;
}
-
-wxSocketBase::wxSockFlags wxSocketBase::GetFlags() const
+
+bool wxSocketBase::WaitForRead(long seconds, long milliseconds)
{
- return m_flags;
+ // Check pushback buffer before entering DoWait
+ if ( m_unread )
+ return true;
+
+ // Check if the socket is not already ready for input, if it is, there is
+ // no need to start waiting for it (worse, we'll actually never get a
+ // notification about the socket becoming ready if it is already under
+ // Windows)
+ if ( m_impl->Select(wxSOCKET_INPUT_FLAG) )
+ return true;
+
+ return DoWait(seconds, milliseconds, wxSOCKET_INPUT_FLAG) != 0;
}
-// --------------------------------------------------------------
-// wxSocketBase callback management
-// --------------------------------------------------------------
-wxSocketBase::wxSockCbk wxSocketBase::Callback(wxSockCbk cbk_)
+bool wxSocketBase::WaitForWrite(long seconds, long milliseconds)
{
- wxSockCbk old_cbk = cbk_;
+ if ( m_impl->Select(wxSOCKET_OUTPUT_FLAG) )
+ return true;
- m_cbk = cbk_;
- return old_cbk;
+ return DoWait(seconds, milliseconds, wxSOCKET_OUTPUT_FLAG) != 0;
}
-char *wxSocketBase::CallbackData(char *data)
+bool wxSocketBase::WaitForLost(long seconds, long milliseconds)
{
- char *old_data = m_cdata;
-
- m_cdata = data;
- return old_data;
+ return DoWait(seconds, milliseconds, wxSOCKET_LOST_FLAG) == -1;
}
-// --------------------------------------------------------------
-// wxSocketBase automatic notifier
-// --------------------------------------------------------------
+// --------------------------------------------------------------------------
+// Miscellaneous
+// --------------------------------------------------------------------------
+
+//
+// Get local or peer address
+//
-static void LINKAGEMODE wx_socket_callback(GSocket * WXUNUSED(socket),
- GSocketEvent event, char *cdata)
+bool wxSocketBase::GetPeer(wxSockAddress& addr) const
{
- wxSocketBase *sckobj = (wxSocketBase *)cdata;
+ wxCHECK_MSG( m_impl, false, "invalid socket" );
+
+ const wxSockAddressImpl& peer = m_impl->GetPeer();
+ if ( !peer.IsOk() )
+ return false;
- sckobj->OnRequest((wxSocketNotify)event);
+ addr.SetAddress(peer);
+
+ return true;
}
-wxSocketEventFlags wxSocketBase::EventToNotify(wxSocketNotify evt)
+bool wxSocketBase::GetLocal(wxSockAddress& addr) const
{
- switch (evt)
- {
- case GSOCK_INPUT: return GSOCK_INPUT_FLAG;
- case GSOCK_OUTPUT: return GSOCK_OUTPUT_FLAG;
- case GSOCK_CONNECTION: return GSOCK_CONNECTION_FLAG;
- case GSOCK_LOST: return GSOCK_LOST_FLAG;
- }
- return 0;
+ wxCHECK_MSG( m_impl, false, "invalid socket" );
+
+ const wxSockAddressImpl& local = m_impl->GetLocal();
+ if ( !local.IsOk() )
+ return false;
+
+ addr.SetAddress(local);
+
+ return true;
}
-void wxSocketBase::SetNotify(wxSocketEventFlags flags)
+//
+// Save and restore socket state
+//
+
+void wxSocketBase::SaveState()
{
- m_neededreq = flags;
+ 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;
+
+ m_states.Append(state);
}
-void wxSocketBase::Notify(bool notify)
+void wxSocketBase::RestoreState()
{
- m_notify_state = notify;
-}
-
-void wxSocketBase::OnRequest(wxSocketNotify req_evt)
-{
- wxSocketEvent event(m_id);
- wxSocketEventFlags flag = EventToNotify(req_evt);
-
- // NOTE: this duplicates some of the code in _Wait (lost
- // connection and connection establishment handling) but
- // this doesn't hurt. It has to be here because maybe the
- // WaitXXX are not being used, and it has to be in _Wait
- // as well because the event might be a bit delayed.
- //
- switch(req_evt)
- {
- case wxSOCKET_CONNECTION:
- m_establishing = FALSE;
- m_connected = TRUE;
- break;
- case wxSOCKET_LOST:
- m_defer_buffer = NULL;
- Close();
- break;
- case wxSOCKET_INPUT:
- case wxSOCKET_OUTPUT:
- if (m_defer_buffer)
- {
- // GRG: DoDefer() no longer needs to know which
- // event occured, because this was only used to
- // catch LOST events and set m_defer_buffer to
- // NULL, and this is done in OnRequest() now.
- DoDefer();
- // Do not notify to user
+ wxList::compatibility_iterator node;
+ wxSocketState *state;
+
+ node = m_states.GetLast();
+ if (!node)
return;
- }
- break;
- }
- if (((m_neededreq & flag) == flag) && m_notify_state)
- {
- event.m_socket = this;
- event.m_skevt = req_evt;
- ProcessEvent(event);
- OldOnNotify(req_evt);
+ state = (wxSocketState *)node->GetData();
- if (m_cbk)
- m_cbk(*this, req_evt, m_cdata);
- }
+ m_flags = state->m_flags;
+ m_notify = state->m_notify;
+ m_eventmask = state->m_eventmask;
+ m_clientData = state->m_clientData;
+
+ m_states.Erase(node);
+ delete state;
}
-void wxSocketBase::OldOnNotify(wxSocketNotify WXUNUSED(evt))
+//
+// Timeout and flags
+//
+
+void wxSocketBase::SetTimeout(long seconds)
{
-}
+ m_timeout = seconds;
-// --------------------------------------------------------------
-// wxSocketBase set event handler
-// --------------------------------------------------------------
+ if (m_impl)
+ m_impl->SetTimeout(m_timeout * 1000);
+}
-void wxSocketBase::SetEventHandler(wxEvtHandler& h_evt, int id)
+void wxSocketBase::SetFlags(wxSocketFlags flags)
{
- SetNextHandler(&h_evt);
- m_id = id;
+ // Do some sanity checking on the flags used: not all values can be used
+ // together.
+ wxASSERT_MSG( !(flags & wxSOCKET_NOWAIT) ||
+ !(flags & (wxSOCKET_WAITALL | wxSOCKET_BLOCK)),
+ "Using wxSOCKET_WAITALL or wxSOCKET_BLOCK with "
+ "wxSOCKET_NOWAIT doesn't make sense" );
+
+ m_flags = flags;
}
-// --------------------------------------------------------------
-// wxSocketBase pushback library
-// --------------------------------------------------------------
-void wxSocketBase::CreatePushbackAfter(const char *buffer, wxUint32 size)
+// --------------------------------------------------------------------------
+// Event handling
+// --------------------------------------------------------------------------
+
+void wxSocketBase::OnRequest(wxSocketNotify notification)
{
- char *curr_pos;
+ wxSocketEventFlags flag = 0;
+ switch ( notification )
+ {
+ case wxSOCKET_INPUT:
+ flag = wxSOCKET_INPUT_FLAG;
+ break;
+
+ case wxSOCKET_OUTPUT:
+ flag = wxSOCKET_OUTPUT_FLAG;
+ break;
+
+ case wxSOCKET_CONNECTION:
+ flag = wxSOCKET_CONNECTION_FLAG;
- if (m_unread != NULL)
- m_unread = (char *) realloc(m_unread, m_unrd_size+size);
- else
- m_unread = (char *) malloc(size);
+ // we're now successfully connected
+ m_connected = true;
+ m_establishing = false;
- curr_pos = m_unread + m_unrd_size;
+ // error was previously set to wxSOCKET_WOULDBLOCK, but this is not
+ // the case any longer
+ SetError(wxSOCKET_NOERROR);
+ break;
- memcpy(curr_pos, buffer, size);
- m_unrd_size += size;
+ case wxSOCKET_LOST:
+ flag = wxSOCKET_LOST_FLAG;
+
+ // if we lost the connection the socket is now closed and not
+ // connected any more
+ m_connected = false;
+ m_closed = true;
+ break;
+
+ default:
+ wxFAIL_MSG( "unknown wxSocket notification" );
+ }
+
+ // remember the events which were generated for this socket, we're going to
+ // use this in DoWait()
+ m_eventsgot |= flag;
+
+ // send the wx event if enabled and we're interested in it
+ if ( m_notify && (m_eventmask & flag) && m_handler )
+ {
+ // don't generate the events when we're inside DoWait() called from our
+ // own code as we are going to consume the data that has just become
+ // available ourselves and the user code won't see it at all
+ if ( (notification == wxSOCKET_INPUT && m_reading) ||
+ (notification == wxSOCKET_OUTPUT && m_writing) )
+ {
+ return;
+ }
+
+ wxSocketEvent event(m_id);
+ event.m_event = notification;
+ event.m_clientData = m_clientData;
+ event.SetEventObject(this);
+
+ m_handler->AddPendingEvent(event);
+ }
}
-void wxSocketBase::CreatePushbackBefore(const char *buffer, wxUint32 size)
+void wxSocketBase::Notify(bool notify)
{
- if (m_unread == NULL)
- m_unread = (char *)malloc(size);
- else {
- char *tmp;
+ m_notify = notify;
+}
- tmp = (char *)malloc(m_unrd_size + size);
- memcpy(tmp+size, m_unread, m_unrd_size);
- free(m_unread);
+void wxSocketBase::SetNotify(wxSocketEventFlags flags)
+{
+ m_eventmask = flags;
+}
+
+void wxSocketBase::SetEventHandler(wxEvtHandler& handler, int id)
+{
+ m_handler = &handler;
+ m_id = id;
+}
+
+// --------------------------------------------------------------------------
+// Pushback buffer
+// --------------------------------------------------------------------------
- m_unread = tmp;
- }
+void wxSocketBase::Pushback(const void *buffer, wxUint32 size)
+{
+ if (!size) return;
+
+ if (m_unread == NULL)
+ m_unread = malloc(size);
+ else
+ {
+ void *tmp;
- m_unrd_size += size;
+ tmp = malloc(m_unrd_size + size);
+ memcpy((char *)tmp + size, m_unread, m_unrd_size);
+ free(m_unread);
- memcpy(m_unread, buffer, size);
+ m_unread = tmp;
+ }
+
+ m_unrd_size += size;
+
+ memcpy(m_unread, buffer, size);
}
-wxUint32 wxSocketBase::GetPushback(char *buffer, wxUint32 size, bool peek)
+wxUint32 wxSocketBase::GetPushback(void *buffer, wxUint32 size, bool peek)
{
- if (!m_unrd_size)
- return 0;
+ wxCHECK_MSG( buffer, 0, "NULL buffer" );
+
+ if (!m_unrd_size)
+ return 0;
+
+ if (size > (m_unrd_size-m_unrd_cur))
+ size = m_unrd_size-m_unrd_cur;
- if (size > (m_unrd_size-m_unrd_cur))
- size = m_unrd_size-m_unrd_cur;
- memcpy(buffer, (m_unread+m_unrd_cur), size);
+ 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;
+ 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;
+ return size;
}
-// --------------------------------------------------------------
+
+// ==========================================================================
// wxSocketServer
-// --------------------------------------------------------------
+// ==========================================================================
-// --------------------------------------------------------------
-// wxSocketServer ctor and dtor
-// --------------------------------------------------------------
+// --------------------------------------------------------------------------
+// Ctor
+// --------------------------------------------------------------------------
-wxSocketServer::wxSocketServer(wxSockAddress& addr_man,
- wxSockFlags flags) :
- wxSocketBase(flags, SOCK_SERVER)
+wxSocketServer::wxSocketServer(const wxSockAddress& addr,
+ wxSocketFlags flags)
+ : wxSocketBase(flags, wxSOCKET_SERVER)
{
- // Create the socket
- m_socket = GSocket_new();
+ wxLogTrace( wxTRACE_Socket, wxT("Opening wxSocketServer") );
+
+ wxSocketManager * const manager = wxSocketManager::Get();
+ m_impl = manager ? manager->CreateSocket(*this) : NULL;
- if (!m_socket)
- return;
+ if (!m_impl)
+ {
+ wxLogTrace( wxTRACE_Socket, wxT("*** Failed to create m_impl") );
+ 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;
- return;
- }
+ // Setup the socket as server
+ m_impl->SetLocal(addr.GetAddress());
- 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);
+ if (GetFlags() & wxSOCKET_REUSEADDR) {
+ m_impl->SetReusable();
+ }
+ if (GetFlags() & wxSOCKET_BROADCAST) {
+ m_impl->SetBroadcast();
+ }
+ if (GetFlags() & wxSOCKET_NOBIND) {
+ m_impl->DontDoBind();
+ }
+ if (m_impl->CreateServer() != wxSOCKET_NOERROR)
+ {
+ wxDELETE(m_impl);
+
+ wxLogTrace( wxTRACE_Socket, wxT("*** CreateServer() failed") );
+ return;
+ }
+
+ // Notice that we need a cast as wxSOCKET_T is 64 bit under Win64 and that
+ // the cast is safe because a wxSOCKET_T is a handle and so limited to 32
+ // (or, actually, even 24) bit values anyhow.
+ wxLogTrace( wxTRACE_Socket, wxT("wxSocketServer on fd %u"),
+ static_cast<unsigned>(m_impl->m_fd) );
}
-// --------------------------------------------------------------
-// wxSocketServer Accept
-// --------------------------------------------------------------
+// --------------------------------------------------------------------------
+// Accept
+// --------------------------------------------------------------------------
bool wxSocketServer::AcceptWith(wxSocketBase& sock, bool wait)
{
- GSocket *child_socket;
+ if ( !m_impl || (m_impl->m_fd == INVALID_SOCKET) || !m_impl->IsServer() )
+ {
+ wxFAIL_MSG( "can only be called for a valid server socket" );
- if (!m_socket)
- return FALSE;
+ SetError(wxSOCKET_INVSOCK);
- // GRG: If wait == FALSE, then the call should be nonblocking.
- // When we are finished, we put the socket to blocking mode
- // again.
+ return false;
+ }
- if (!wait)
- GSocket_SetNonBlocking(m_socket, TRUE);
+ if ( wait )
+ {
+ // wait until we get a connection
+ if ( !m_impl->SelectWithTimeout(wxSOCKET_INPUT_FLAG) )
+ {
+ SetError(wxSOCKET_TIMEDOUT);
- child_socket = GSocket_WaitConnection(m_socket);
+ return false;
+ }
+ }
- if (!wait)
- GSocket_SetNonBlocking(m_socket, FALSE);
+ sock.m_impl = m_impl->Accept(sock);
- // GRG: this was not being handled!
- if (child_socket == NULL)
- return FALSE;
+ if ( !sock.m_impl )
+ {
+ SetError(m_impl->GetLastError());
- sock.m_type = SOCK_INTERNAL;
- sock.m_socket = child_socket;
- sock.m_connected = TRUE;
+ return false;
+ }
- GSocket_SetTimeout(sock.m_socket, sock.m_timeout);
- GSocket_SetCallback(sock.m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
- GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG,
- wx_socket_callback, (char *)&sock);
+ sock.m_type = wxSOCKET_BASE;
+ sock.m_connected = true;
- return TRUE;
+ return true;
}
wxSocketBase *wxSocketServer::Accept(bool wait)
{
- wxSocketBase* sock = new wxSocketBase();
+ wxSocketBase* sock = new wxSocketBase();
- sock->SetFlags((wxSockFlags)m_flags);
+ sock->SetFlags(m_flags);
- if (!AcceptWith(*sock, wait))
- return NULL;
+ if (!AcceptWith(*sock, wait))
+ {
+ sock->Destroy();
+ sock = NULL;
+ }
- return sock;
+ return sock;
}
bool wxSocketServer::WaitForAccept(long seconds, long milliseconds)
{
- return _Wait(seconds, milliseconds, GSOCK_CONNECTION_FLAG);
+ return DoWait(seconds, milliseconds, wxSOCKET_CONNECTION_FLAG) == 1;
}
-// --------------------------------------------------------------
-// wxSocketClient
-// --------------------------------------------------------------
+wxSOCKET_T wxSocketBase::GetSocket() const
+{
+ wxASSERT_MSG( m_impl, wxS("Socket not initialised") );
+
+ return m_impl->m_fd;
+}
+
+
+bool wxSocketBase::GetOption(int level, int optname, void *optval, int *optlen)
+{
+ wxASSERT_MSG( m_impl, wxT("Socket not initialised") );
-// --------------------------------------------------------------
-// wxSocketClient ctor and dtor
-// --------------------------------------------------------------
+ SOCKOPTLEN_T lenreal = *optlen;
+ if ( getsockopt(m_impl->m_fd, level, optname,
+ static_cast<char *>(optval), &lenreal) != 0 )
+ return false;
-wxSocketClient::wxSocketClient(wxSockFlags _flags) :
- wxSocketBase(_flags, SOCK_CLIENT)
+ *optlen = lenreal;
+
+ return true;
+}
+
+bool
+wxSocketBase::SetOption(int level, int optname, const void *optval, int optlen)
{
+ wxASSERT_MSG( m_impl, wxT("Socket not initialised") );
+
+ return setsockopt(m_impl->m_fd, level, optname,
+ static_cast<const char *>(optval), optlen) == 0;
}
-wxSocketClient::~wxSocketClient()
+bool wxSocketBase::SetLocal(const wxIPV4address& local)
{
+ m_localAddress = local;
+
+ return true;
}
-// --------------------------------------------------------------
-// wxSocketClient Connect functions
-// --------------------------------------------------------------
-bool wxSocketClient::Connect(wxSockAddress& addr_man, bool wait)
+// ==========================================================================
+// wxSocketClient
+// ==========================================================================
+
+// --------------------------------------------------------------------------
+// Ctor and dtor
+// --------------------------------------------------------------------------
+
+wxSocketClient::wxSocketClient(wxSocketFlags flags)
+ : wxSocketBase(flags, wxSOCKET_CLIENT)
{
- GSocketError err;
+ m_initialRecvBufferSize =
+ m_initialSendBufferSize = -1;
+}
- if (IsConnected())
- Close();
+// --------------------------------------------------------------------------
+// Connect
+// --------------------------------------------------------------------------
+
+bool wxSocketClient::DoConnect(const wxSockAddress& remote,
+ const wxSockAddress* local,
+ bool wait)
+{
+ if ( m_impl )
+ {
+ // Shutdown and destroy the old socket
+ Close();
+ delete m_impl;
+ }
+
+ m_connected = false;
+ m_establishing = false;
- // This should never happen.
- if (m_socket)
- GSocket_destroy(m_socket);
+ // Create and set up the new one
+ wxSocketManager * const manager = wxSocketManager::Get();
+ m_impl = manager ? manager->CreateSocket(*this) : NULL;
+ if ( !m_impl )
+ return false;
- // Initialize all socket stuff ...
- m_socket = GSocket_new();
- m_connected = FALSE;
- m_establishing = FALSE;
+ // Reuse makes sense for clients too, if we are trying to rebind to the same port
+ if (GetFlags() & wxSOCKET_REUSEADDR)
+ m_impl->SetReusable();
+ if (GetFlags() & wxSOCKET_BROADCAST)
+ m_impl->SetBroadcast();
+ if (GetFlags() & wxSOCKET_NOBIND)
+ m_impl->DontDoBind();
- if (!m_socket)
- return FALSE;
+ // Bind to the local IP address and port, when provided or if one had been
+ // set before
+ if ( !local && m_localAddress.GetAddress().IsOk() )
+ local = &m_localAddress;
- GSocket_SetTimeout(m_socket, m_timeout);
+ if ( local )
+ m_impl->SetLocal(local->GetAddress());
- // GRG: If wait == FALSE, then the call should be nonblocking.
- // When we are finished, we put the socket to blocking mode
- // again.
+ m_impl->SetInitialSocketBuffers(m_initialRecvBufferSize, m_initialSendBufferSize);
- if (!wait)
- GSocket_SetNonBlocking(m_socket, TRUE);
+ m_impl->SetPeer(remote.GetAddress());
- GSocket_SetPeer(m_socket, addr_man.GetAddress());
- err = GSocket_Connect(m_socket, GSOCK_STREAMED);
- GSocket_SetCallback(m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
- GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG,
- wx_socket_callback, (char *)this);
+ // Finally do create the socket and connect to the peer
+ const wxSocketError err = m_impl->CreateClient(wait);
- if (!wait)
- GSocket_SetNonBlocking(m_socket, FALSE);
+ if ( err != wxSOCKET_NOERROR )
+ {
+ if ( err == wxSOCKET_WOULDBLOCK )
+ {
+ wxASSERT_MSG( !wait, "shouldn't get this for blocking connect" );
- if (err != GSOCK_NOERROR)
- {
- if (err == GSOCK_WOULDBLOCK)
- m_establishing = TRUE;
+ m_establishing = true;
+ }
- return FALSE;
- }
+ return false;
+ }
- m_connected = TRUE;
- return TRUE;
+ m_connected = true;
+ return true;
+}
+
+bool wxSocketClient::Connect(const wxSockAddress& remote, bool wait)
+{
+ return DoConnect(remote, NULL, wait);
+}
+
+bool wxSocketClient::Connect(const wxSockAddress& remote,
+ const wxSockAddress& local,
+ bool wait)
+{
+ return DoConnect(remote, &local, wait);
}
bool wxSocketClient::WaitOnConnect(long seconds, long milliseconds)
{
- if (m_connected) // Already connected
- return TRUE;
+ if ( m_connected )
+ {
+ // this happens if the initial attempt to connect succeeded without
+ // blocking
+ return true;
+ }
- if (!m_establishing || !m_socket) // No connection in progress
- return FALSE;
+ wxCHECK_MSG( m_establishing && m_impl, false,
+ "No connection establishment attempt in progress" );
- return _Wait(seconds, milliseconds, GSOCK_CONNECTION_FLAG);
+ // notice that we return true even if DoWait() returned -1, i.e. if an
+ // error occurred and connection was lost: this is intentional as we should
+ // return false only if timeout expired without anything happening
+ return DoWait(seconds, milliseconds, wxSOCKET_CONNECTION_FLAG) != 0;
}
-// --------------------------------------------------------------
-// wxSocketEvent
-// --------------------------------------------------------------
+// ==========================================================================
+// wxDatagramSocket
+// ==========================================================================
-wxSocketEvent::wxSocketEvent(int id)
- : wxEvent(id)
+wxDatagramSocket::wxDatagramSocket( const wxSockAddress& addr,
+ wxSocketFlags flags )
+ : wxSocketBase( flags, wxSOCKET_DATAGRAM )
{
- wxEventType type = (wxEventType)wxEVT_SOCKET;
+ // Create the socket
+ wxSocketManager * const manager = wxSocketManager::Get();
+ m_impl = manager ? manager->CreateSocket(*this) : NULL;
+
+ if (!m_impl)
+ return;
+
+ // Setup the socket as non connection oriented
+ m_impl->SetLocal(addr.GetAddress());
+ if (flags & wxSOCKET_REUSEADDR)
+ {
+ m_impl->SetReusable();
+ }
+ if (GetFlags() & wxSOCKET_BROADCAST)
+ {
+ m_impl->SetBroadcast();
+ }
+ if (GetFlags() & wxSOCKET_NOBIND)
+ {
+ m_impl->DontDoBind();
+ }
- SetEventType(type);
+ if ( m_impl->CreateUDP() != wxSOCKET_NOERROR )
+ {
+ wxDELETE(m_impl);
+ return;
+ }
+
+ // Initialize all stuff
+ m_connected = false;
+ m_establishing = false;
}
-void wxSocketEvent::CopyObject(wxObject& obj_d) const
+wxDatagramSocket& wxDatagramSocket::RecvFrom( wxSockAddress& addr,
+ void* buf,
+ wxUint32 nBytes )
{
- wxSocketEvent *event = (wxSocketEvent *)&obj_d;
+ Read(buf, nBytes);
+ GetPeer(addr);
+ return (*this);
+}
- wxEvent::CopyObject(obj_d);
+wxDatagramSocket& wxDatagramSocket::SendTo( const wxSockAddress& addr,
+ const void* buf,
+ wxUint32 nBytes )
+{
+ wxASSERT_MSG( m_impl, wxT("Socket not initialised") );
- event->m_skevt = m_skevt;
- event->m_socket = m_socket;
+ m_impl->SetPeer(addr.GetAddress());
+ Write(buf, nBytes);
+ return (*this);
}
-// --------------------------------------------------------------------------
+// ==========================================================================
// wxSocketModule
-// --------------------------------------------------------------------------
-class WXDLLEXPORT wxSocketModule: public wxModule {
- DECLARE_DYNAMIC_CLASS(wxSocketModule)
- public:
- bool OnInit() {
- return GSocket_Init();
- }
- void OnExit() {
- GSocket_Cleanup();
- }
+// ==========================================================================
+
+class wxSocketModule : public wxModule
+{
+public:
+ virtual bool OnInit()
+ {
+ // wxSocketBase will call Initialize() itself only if sockets are
+ // really used, don't do it from here
+ return true;
+ }
+
+ virtual void OnExit()
+ {
+ if ( wxSocketBase::IsInitialized() )
+ wxSocketBase::Shutdown();
+ }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxSocketModule)
};
IMPLEMENT_DYNAMIC_CLASS(wxSocketModule, wxModule)
+#if defined(wxUSE_SELECT_DISPATCHER) && wxUSE_SELECT_DISPATCHER
+// NOTE: we need to force linking against socketiohandler.cpp otherwise in
+// static builds of wxWidgets the ManagerSetter::ManagerSetter ctor
+// contained there wouldn't be ever called
+wxFORCE_LINK_MODULE( socketiohandler )
+#endif
+
+// same for ManagerSetter in the MSW file
+#ifdef __WINDOWS__
+ wxFORCE_LINK_MODULE( mswsocket )
#endif
- // wxUSE_SOCKETS
+
+// and for OSXManagerSetter in the OS X one
+#ifdef __WXOSX__
+ wxFORCE_LINK_MODULE( osxsocket )
+#endif
+
+#endif // wxUSE_SOCKETS
projects / wxWidgets.git / blobdiff