// Authors: Guilhem Lavaux, Guillermo Rodriguez Garcia
// Created: April 1997
// Copyright: (C) 1999-1997, Guilhem Lavaux
-// (C) 2000-1999, Guillermo Rodriguez Garcia
+// (C) 1999-2000, Guillermo Rodriguez Garcia
+// (C) 2008 Vadim Zeitlin
// RCS_ID: $Id$
-// License: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ==========================================================================
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
#if wxUSE_SOCKETS
-#include "wx/app.h"
-#include "wx/apptrait.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"
+#include "wx/socket.h"
+
+#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/datetime.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"
// macros and constants
// --------------------------------------------------------------------------
+// event
+wxDEFINE_EVENT(wxEVT_SOCKET, wxSocketEvent);
+
// discard buffer
#define MAX_DISCARD_SIZE (10 * 1024)
-// what to do within waits: 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 wxWidgets) 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_THREADS
- #define PROCESS_EVENTS() \
- { \
- if ( wxThread::IsMain() ) \
- wxYield(); \
- else \
- wxThread::Yield(); \
- }
-#else // !wxUSE_THREADS
- #define PROCESS_EVENTS() wxYield()
-#endif // wxUSE_THREADS/!wxUSE_THREADS
-
-#define wxTRACE_Socket _T("wxSocket")
+#define wxTRACE_Socket wxT("wxSocket")
// --------------------------------------------------------------------------
// wxWin macros
IMPLEMENT_CLASS(wxDatagramSocket, wxSocketBase)
IMPLEMENT_DYNAMIC_CLASS(wxSocketEvent, wxEvent)
+// ----------------------------------------------------------------------------
+// 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:
- wxSocketFlags m_flags;
- wxSocketEventFlags m_eventmask;
- bool m_notify;
- void *m_clientData;
+ wxSocketFlags m_flags;
+ wxSocketEventFlags m_eventmask;
+ bool m_notify;
+ void *m_clientData;
+
+public:
+ wxSocketState() : wxObject() {}
+ wxDECLARE_NO_COPY_CLASS(wxSocketState);
+};
+
+// wxSocketWaitModeChanger: temporarily change the socket flags affecting its
+// wait mode
+class wxSocketWaitModeChanger
+{
public:
- wxSocketState() : wxObject() {}
+ // 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())
+
+ {
+ 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);
+};
+
+// 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);
+};
+
+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);
+ }
- DECLARE_NO_COPY_CLASS(wxSocketState)
+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;
+}
+
+/* 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();
+}
+
+// ==========================================================================
+// wxSocketImpl
+// ==========================================================================
+
+wxSocketImpl::wxSocketImpl(wxSocketBase& wxsocket)
+ : m_wxsocket(&wxsocket)
+{
+ 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;
+}
+
+wxSocketImpl::~wxSocketImpl()
+{
+ if ( m_fd != INVALID_SOCKET )
+ Shutdown();
+}
+
+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;
+}
+
+void wxSocketImpl::PostCreation()
+{
+ // 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" );
+
+ EnableSocketOption(SO_BROADCAST);
+ }
+
+ if ( m_initialRecvBufferSize >= 0 )
+ SetSocketOption(SO_RCVBUF, m_initialRecvBufferSize);
+ if ( m_initialSendBufferSize >= 0 )
+ SetSocketOption(SO_SNDBUF, m_initialSendBufferSize);
+
+ // we always put our sockets in unblocked mode and handle blocking
+ // ourselves in DoRead/Write() if wxSOCKET_WAITALL is specified
+ UnblockAndRegisterWithEventLoop();
+}
+
+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());
+ }
+
+ WX_SOCKLEN_T lenAddr = m_local.GetLen();
+ if ( getsockname(m_fd, m_local.GetWritableAddr(), &lenAddr) != 0 )
+ {
+ Close();
+ m_error = wxSOCKET_IOERR;
+ return m_error;
+ }
+
+ return wxSOCKET_NOERROR;
+}
+
+wxSocketError wxSocketImpl::CreateServer()
+{
+ if ( !PreCreateCheck(m_local) )
+ return m_error;
+
+ m_server = true;
+ m_stream = true;
+
+ // do create the socket
+ m_fd = socket(m_local.GetFamily(), SOCK_STREAM, 0);
+
+ 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)
+{
+ 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;
+ }
+ }
+
+ // 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;
+ }
+
+ return m_error;
+}
+
+
+wxSocketError wxSocketImpl::CreateUDP()
+{
+ if ( !PreCreateCheck(m_local) )
+ return m_error;
+
+ m_stream = false;
+ m_server = false;
+
+ m_fd = socket(m_local.GetFamily(), SOCK_DGRAM, 0);
+
+ if ( m_fd == INVALID_SOCKET )
+ {
+ m_error = wxSOCKET_IOERR;
+ return wxSOCKET_IOERR;
+ }
+
+ PostCreation();
+
+ 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 wxSOCKET_NOERROR;
+}
+
+wxSocketImpl *wxSocketImpl::Accept(wxSocketBase& wxsocket)
+{
+ wxSockAddressStorage from;
+ WX_SOCKLEN_T fromlen = sizeof(from);
+ const SOCKET fd = accept(m_fd, &from.addr, &fromlen);
+
+ // accepting is similar to reading in the sense that it resets "ready for
+ // read" flag on the socket
+ ReenableEvents(wxSOCKET_INPUT_FLAG);
+
+ if ( fd == INVALID_SOCKET )
+ return NULL;
+
+ wxSocketManager * const manager = wxSocketManager::Get();
+ if ( !manager )
+ return NULL;
+
+ wxSocketImpl * const sock = manager->CreateSocket(wxsocket);
+ if ( !sock )
+ return NULL;
+
+ sock->m_fd = fd;
+ sock->m_peer = wxSockAddressImpl(from.addr, fromlen);
+
+ sock->UnblockAndRegisterWithEventLoop();
+
+ return sock;
+}
+
+
+void wxSocketImpl::Close()
+{
+ if ( m_fd != INVALID_SOCKET )
+ {
+ DoClose();
+ m_fd = INVALID_SOCKET;
+ }
+}
+
+void wxSocketImpl::Shutdown()
+{
+ if ( m_fd != INVALID_SOCKET )
+ {
+ shutdown(m_fd, 1 /* SD_SEND */);
+ Close();
+ }
+}
+
+/*
+ * Sets the timeout for blocking calls. Time is expressed in
+ * milliseconds.
+ */
+void wxSocketImpl::SetTimeout(unsigned long millis)
+{
+ SetTimeValFromMS(m_timeout, millis);
+}
+
+void wxSocketImpl::NotifyOnStateChange(wxSocketNotify event)
+{
+ m_wxsocket->OnRequest(event);
+}
+
+/* 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;
+ }
+
+ if ( !local.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return wxSOCKET_INVADDR;
+ }
+
+ m_local = local;
+
+ return wxSOCKET_NOERROR;
+}
+
+wxSocketError wxSocketImpl::SetPeer(const wxSockAddressImpl& peer)
+{
+ if ( !peer.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return wxSOCKET_INVADDR;
+ }
+
+ m_peer = peer;
+
+ return wxSOCKET_NOERROR;
+}
+
+const wxSockAddressImpl& wxSocketImpl::GetLocal()
+{
+ if ( !m_local.IsOk() )
+ UpdateLocalAddress();
+
+ return m_local;
+}
+
+// ----------------------------------------------------------------------------
+// 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
+
+int wxSocketImpl::RecvStream(void *buffer, int size)
+{
+ int ret;
+ DO_WHILE_EINTR( ret, recv(m_fd, static_cast<char *>(buffer), size, 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);
+
+ Shutdown();
+
+ // do not return an error in this case however
+ }
+
+ return ret;
+}
+
+int wxSocketImpl::SendStream(const void *buffer, int size)
+{
+#ifdef wxNEEDS_IGNORE_SIGPIPE
+ IgnoreSignal ignore(SIGPIPE);
+#endif
+
+ int ret;
+ DO_WHILE_EINTR( ret, send(m_fd, static_cast<const char *>(buffer), size,
+ wxSOCKET_MSG_NOSIGNAL) );
+
+ return ret;
+}
+
+int wxSocketImpl::RecvDgram(void *buffer, int size)
+{
+ wxSockAddressStorage from;
+ WX_SOCKLEN_T fromlen = sizeof(from);
+
+ int ret;
+ DO_WHILE_EINTR( ret, recvfrom(m_fd, static_cast<char *>(buffer), size,
+ 0, &from.addr, &fromlen) );
+
+ if ( ret == SOCKET_ERROR )
+ return SOCKET_ERROR;
+
+ m_peer = wxSockAddressImpl(from.addr, fromlen);
+ if ( !m_peer.IsOk() )
+ return -1;
+
+ return ret;
+}
+
+int wxSocketImpl::SendDgram(const void *buffer, int size)
+{
+ if ( !m_peer.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return -1;
+ }
+
+ int ret;
+ DO_WHILE_EINTR( ret, sendto(m_fd, static_cast<const char *>(buffer), size,
+ 0, m_peer.GetAddr(), m_peer.GetLen()) );
+
+ return ret;
+}
+
+int wxSocketImpl::Read(void *buffer, int size)
+{
+ // 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;
+ }
+
+ int ret = m_stream ? RecvStream(buffer, size)
+ : RecvDgram(buffer, size);
+
+ m_error = ret == SOCKET_ERROR ? GetLastError() : wxSOCKET_NOERROR;
+
+ return ret;
+}
+
+int wxSocketImpl::Write(const void *buffer, int size)
+{
+ if ( m_fd == INVALID_SOCKET || m_server )
+ {
+ m_error = wxSOCKET_INVSOCK;
+ return -1;
+ }
+
+ int ret = m_stream ? SendStream(buffer, size)
+ : SendDgram(buffer, size);
+
+ m_error = ret == SOCKET_ERROR ? GetLastError() : wxSOCKET_NOERROR;
+
+ return ret;
+}
+
// ==========================================================================
// 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;
+namespace
+{
+
+// 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;
+
+} // anonymous namespace
bool wxSocketBase::IsInitialized()
{
- return m_countInit > 0;
+ wxASSERT_MSG( wxIsMainThread(), "unsafe to call from other threads" );
+
+ return gs_socketInitCount != 0;
}
bool wxSocketBase::Initialize()
{
- if ( !m_countInit++ )
- {
- /*
- 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(),
- wxT("Call wxSocketBase::Initialize() from the main thread first!"));
-
- wxAppTraits *traits = wxAppConsole::GetInstance() ?
- wxAppConsole::GetInstance()->GetTraits() : NULL;
- GSocketGUIFunctionsTable *functions =
- traits ? traits->GetSocketGUIFunctionsTable() : NULL;
- GSocket_SetGUIFunctions(functions);
-
- if ( !GSocket_Init() )
- {
- m_countInit--;
+ 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;
- }
}
+ gs_socketInitCount++;
+
return true;
}
void wxSocketBase::Shutdown()
{
- // we should be initialized
- wxASSERT_MSG( m_countInit, _T("extra call to Shutdown()") );
- if ( --m_countInit == 0 )
+ wxCHECK_RET( wxIsMainThread(), "must be called from the main thread" );
+
+ wxCHECK_RET( gs_socketInitCount > 0, "too many calls to Shutdown()" );
+
+ if ( !--gs_socketInitCount )
{
- GSocket_Cleanup();
+ wxSocketManager * const manager = wxSocketManager::Get();
+ wxCHECK_RET( manager, "should have a socket manager" );
+
+ manager->OnExit();
}
}
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 = wxID_ANY;
- m_handler = NULL;
- m_clientData = NULL;
- m_notify = false;
- m_eventmask = 0;
-
- 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();
- }
+ 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_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();
+ Init();
}
wxSocketBase::wxSocketBase(wxSocketFlags flags, wxSocketType type)
{
- Init();
+ Init();
- m_flags = flags;
- m_type = type;
+ SetFlags(flags);
+
+ m_type = type;
}
wxSocketBase::~wxSocketBase()
{
- // Just in case the app called Destroy() *and* then deleted
- // the socket immediately: don't leave dangling pointers.
- wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
- if ( traits )
- traits->RemoveFromPendingDelete(this);
+ // Shutdown and close the socket
+ if (!m_beingDeleted)
+ Close();
- // Shutdown and close the socket
- if (!m_beingDeleted)
- Close();
+ // Destroy the implementation object
+ delete m_impl;
- // Destroy the GSocket object
- if (m_socket)
- delete m_socket;
-
- // Free the pushback buffer
- if (m_unread)
+ // Free the pushback buffer
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;
+ // 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();
+
+ // Suppress events from now on
+ Notify(false);
+
+ // Schedule this object for deletion instead of destroying it right now if
+ // possible as we may have other events pending for it
+ if ( wxTheApp )
+ {
+ wxTheApp->ScheduleForDestruction(this);
+ }
+ else // no app
+ {
+ // in wxBase we might have no app object at all, don't leak memory
+ delete this;
+ }
- // Shutdown and close the socket
- Close();
+ return true;
+}
- // Supress events from now on
- Notify(false);
+// ----------------------------------------------------------------------------
+// simple accessors
+// ----------------------------------------------------------------------------
- // schedule this object for deletion
- wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
- if ( traits )
- {
- // let the traits object decide what to do with us
- traits->ScheduleForDestroy(this);
- }
- else // no app or no traits
- {
- // in wxBase we might have no app object at all, don't leak memory
- delete this;
- }
+void wxSocketBase::SetError(wxSocketError error)
+{
+ m_impl->m_error = error;
+}
- return true;
+wxSocketError wxSocketBase::LastError() const
+{
+ return m_impl->GetError();
}
// --------------------------------------------------------------------------
// Basic IO calls
// --------------------------------------------------------------------------
-// The following IO operations update m_error and m_lcount:
+// The following IO operations update 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();
+ // Interrupt pending waits
+ InterruptWait();
- if (m_socket)
- {
- // Disable callbacks
- m_socket->UnsetCallback(GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
- GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG);
+ ShutdownOutput();
- // Shutdown the connection
- m_socket->Shutdown();
- }
+ m_connected = false;
+ m_establishing = false;
+ return true;
+}
- m_connected = false;
- m_establishing = false;
- return true;
+void wxSocketBase::ShutdownOutput()
+{
+ if ( m_impl )
+ m_impl->Shutdown();
}
wxSocketBase& wxSocketBase::Read(void* buffer, wxUint32 nbytes)
{
- // Mask read events
- m_reading = true;
-
- m_lcount = _Read(buffer, nbytes);
+ wxSocketReadGuard read(this);
- // 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);
+ m_lcount = DoRead(buffer, nbytes);
- // Allow read events from now on
- m_reading = false;
-
- return *this;
+ return *this;
}
-wxUint32 wxSocketBase::_Read(void* buffer, wxUint32 nbytes)
+wxUint32 wxSocketBase::DoRead(void* buffer_, wxUint32 nbytes)
{
- int total;
+ wxCHECK_MSG( m_impl, 0, "socket must be valid" );
- // Try the pushback buffer first
- total = GetPushback(buffer, nbytes, false);
- nbytes -= total;
- buffer = (char *)buffer + total;
+ // We use pointer arithmetic here which doesn't work with void pointers.
+ char *buffer = static_cast<char *>(buffer_);
+ wxCHECK_MSG( buffer, 0, "NULL buffer" );
- // 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;
+ // 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;
- // Possible combinations (they are checked in this order)
- // wxSOCKET_NOWAIT
- // wxSOCKET_WAITALL (with or without wxSOCKET_BLOCK)
- // wxSOCKET_BLOCK
- // wxSOCKET_NONE
- //
- int ret;
- if (m_flags & wxSOCKET_NOWAIT)
- {
- m_socket->SetNonBlocking(1);
- ret = m_socket->Read((char *)buffer, nbytes);
- m_socket->SetNonBlocking(0);
-
- if (ret > 0)
- total += ret;
- }
- else
- {
- bool more = true;
-
- while (more)
- {
- if ( !(m_flags & wxSOCKET_BLOCK) && !WaitForRead() )
- break;
-
- ret = m_socket->Read((char *)buffer, nbytes);
-
- if (ret > 0)
- {
- total += ret;
- nbytes -= ret;
- buffer = (char *)buffer + ret;
- }
+ 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 )
+ {
+ // 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) || !total )
+ SetError(wxSOCKET_IOERR);
+ break;
+ }
+
+ total += 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));
+ // if we are happy to read something and not the entire nbytes bytes,
+ // then we're done
+ if ( !(m_flags & wxSOCKET_WAITALL) )
+ break;
+
+ nbytes -= ret;
+ buffer += ret;
}
- }
- return total;
+ 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
+ struct
{
- 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;
+ unsigned char sig[4];
+ unsigned char len[4];
+ } msg;
- if (len2 != 0)
- goto exit;
- }
- if (_Read(&msg, sizeof(msg)) != sizeof(msg))
- goto exit;
+ wxSocketReadGuard read(this);
- sig = (wxUint32)msg.sig[0];
- sig |= (wxUint32)(msg.sig[1] << 8);
- sig |= (wxUint32)(msg.sig[2] << 16);
- sig |= (wxUint32)(msg.sig[3] << 24);
+ wxSocketWaitModeChanger changeFlags(this, wxSOCKET_WAITALL);
- if (sig != 0xdeadfeed)
- {
- wxLogWarning(_("wxSocket: invalid signature in ReadMsg."));
- goto exit;
- }
+ 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);
- // everything was OK
- error = false;
+ 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 = len ? DoRead(buffer, len) : 0;
+
+ 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;
+ }
+ }
+ }
-exit:
- m_error = error;
- m_lcount = total;
- m_reading = false;
- SetFlags(old_flags);
+ if ( !ok )
+ SetError(wxSOCKET_IOERR);
- return *this;
+ return *this;
}
wxSocketBase& wxSocketBase::Peek(void* buffer, wxUint32 nbytes)
{
- // Mask read events
- m_reading = true;
+ wxSocketReadGuard read(this);
- m_lcount = _Read(buffer, nbytes);
- Pushback(buffer, m_lcount);
+ // Peek() should never block
+ wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT);
- // 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);
+ m_lcount = DoRead(buffer, nbytes);
- // Allow read events again
- m_reading = false;
+ Pushback(buffer, m_lcount);
- return *this;
+ 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);
+ wxSocketWriteGuard write(this);
- // Allow write events again
- m_writing = false;
+ m_lcount = DoWrite(buffer, nbytes);
- return *this;
+ return *this;
}
-wxUint32 wxSocketBase::_Write(const void *buffer, wxUint32 nbytes)
+// 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)
{
- wxUint32 total = 0;
+ wxCHECK_MSG( m_impl, 0, "socket must be valid" );
- // If the socket is invalid or parameters are ill, return immediately
- if (!m_socket || !buffer || !nbytes)
- return 0;
+ const char *buffer = static_cast<const char *>(buffer_);
+ wxCHECK_MSG( buffer, 0, "NULL buffer" );
- // Possible combinations (they are checked in this order)
- // wxSOCKET_NOWAIT
- // wxSOCKET_WAITALL (with or without wxSOCKET_BLOCK)
- // wxSOCKET_BLOCK
- // wxSOCKET_NONE
- //
- int ret;
- if (m_flags & wxSOCKET_NOWAIT)
- {
- m_socket->SetNonBlocking(1);
- ret = m_socket->Write((const char *)buffer, nbytes);
- m_socket->SetNonBlocking(0);
+ wxUint32 total = 0;
+ while ( nbytes )
+ {
+ if ( m_impl->m_stream && !m_connected )
+ {
+ if ( (m_flags & wxSOCKET_WAITALL) || !total )
+ SetError(wxSOCKET_IOERR);
+ break;
+ }
- if (ret > 0)
- total = ret;
- }
- else
- {
- bool more = true;
+ const int ret = m_impl->Write(buffer, nbytes);
+ if ( ret == -1 )
+ {
+ if ( m_impl->GetLastError() == wxSOCKET_WOULDBLOCK )
+ {
+ if ( m_flags & wxSOCKET_NOWAIT )
+ break;
+
+ if ( !DoWaitWithTimeout(wxSOCKET_OUTPUT_FLAG) )
+ {
+ SetError(wxSOCKET_TIMEDOUT);
+ break;
+ }
+
+ continue;
+ }
+ else // "real" error
+ {
+ SetError(wxSOCKET_IOERR);
+ break;
+ }
+ }
- while (more)
- {
- if ( !(m_flags & wxSOCKET_BLOCK) && !WaitForWrite() )
- break;
+ total += ret;
- ret = m_socket->Write((const char *)buffer, nbytes);
+ if ( !(m_flags & wxSOCKET_WAITALL) )
+ break;
- 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));
+ buffer += ret;
}
- }
- return total;
+ return total;
}
wxSocketBase& wxSocketBase::WriteMsg(const void *buffer, wxUint32 nbytes)
{
- wxUint32 total;
- bool error;
- struct
- {
- unsigned char sig[4];
- unsigned char len[4];
- } msg;
-
- // Mask write events
- m_writing = true;
-
- error = true;
- total = 0;
- 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;
+ struct
+ {
+ unsigned char sig[4];
+ unsigned char len[4];
+ } msg;
- total = _Write(buffer, nbytes);
+ wxSocketWriteGuard write(this);
- if (total < nbytes)
- goto exit;
+ wxSocketWaitModeChanger changeFlags(this, wxSOCKET_WAITALL);
- 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;
+ msg.sig[0] = (unsigned char) 0xad;
+ msg.sig[1] = (unsigned char) 0xde;
+ msg.sig[2] = (unsigned char) 0xed;
+ msg.sig[3] = (unsigned char) 0xfe;
- if ((_Write(&msg, sizeof(msg))) < sizeof(msg))
- goto exit;
+ 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);
- // everything was OK
- error = false;
+ bool ok = false;
+ if ( DoWrite(&msg, sizeof(msg)) == sizeof(msg) )
+ {
+ m_lcount = DoWrite(buffer, nbytes);
+ if ( m_lcount == 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;
+ }
+ }
-exit:
- m_error = error;
- m_lcount = total;
- m_writing = false;
+ if ( !ok )
+ SetError(wxSOCKET_IOERR);
- return *this;
+ return *this;
}
wxSocketBase& wxSocketBase::Unread(const void *buffer, wxUint32 nbytes)
{
- if (nbytes != 0)
- Pushback(buffer, nbytes);
+ if (nbytes != 0)
+ Pushback(buffer, nbytes);
- m_error = false;
- m_lcount = nbytes;
+ SetError(wxSOCKET_NOERROR);
+ m_lcount = nbytes;
- return *this;
+ return *this;
}
wxSocketBase& wxSocketBase::Discard()
{
- char *buffer = new char[MAX_DISCARD_SIZE];
- wxUint32 ret;
- wxUint32 total = 0;
+ char *buffer = new char[MAX_DISCARD_SIZE];
+ wxUint32 ret;
+ wxUint32 total = 0;
- // Mask read events
- m_reading = true;
+ wxSocketReadGuard read(this);
- SetFlags(wxSOCKET_NOWAIT);
+ wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT);
- do
- {
- ret = _Read(buffer, MAX_DISCARD_SIZE);
- total += ret;
- }
- while (ret == MAX_DISCARD_SIZE);
-
- delete[] buffer;
- m_lcount = total;
- m_error = false;
+ do
+ {
+ ret = DoRead(buffer, MAX_DISCARD_SIZE);
+ total += ret;
+ }
+ while (ret == MAX_DISCARD_SIZE);
- // Allow read events again
- m_reading = false;
+ delete[] buffer;
+ m_lcount = total;
+ SetError(wxSOCKET_NOERROR);
- return *this;
+ 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;
-
- bool has_event_loop = wxTheApp ? (wxTheApp->GetTraits() ? true : false) : false;
-
- // 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.
-
- wxDateTime current_time = wxDateTime::UNow();
- unsigned int time_limit = (current_time.GetTicks() * 1000) + current_time.GetMillisecond() + timeout;
- bool done = false;
- bool valid_result = false;
-
- if (!has_event_loop)
- {
- // This is used to avoid a busy loop on wxBase - having a select
- // timeout of 50 ms per iteration should be enough.
- if (timeout > 50)
- m_socket->SetTimeout(50);
+/*
+ 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)
+{
+ if ( m_fd == INVALID_SOCKET )
+ return (wxSOCKET_LOST_FLAG & flags);
+
+ struct timeval tv;
+ if ( timeout )
+ tv = *timeout;
else
- m_socket->SetTimeout(timeout);
- }
+ tv.tv_sec = tv.tv_usec = 0;
- while (!done)
- {
- result = m_socket->Select(flags | GSOCK_LOST_FLAG);
+ // 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
- // Incoming connection (server) or connection established (client)
- if (result & GSOCK_CONNECTION_FLAG)
+ 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 )
{
- m_connected = true;
- m_establishing = false;
- valid_result = true;
- break;
+ if ( m_server )
+ preadfds = &readfds;
+ else
+ pwritefds = &writefds;
}
- // Data available or output buffer ready
- if ((result & GSOCK_INPUT_FLAG) || (result & GSOCK_OUTPUT_FLAG))
+ if ( preadfds )
{
- valid_result = true;
- break;
+ wxFD_ZERO(preadfds);
+ wxFD_SET(m_fd, preadfds);
}
- // Connection lost
- if (result & GSOCK_LOST_FLAG)
+ if ( pwritefds )
{
- m_connected = false;
- m_establishing = false;
- valid_result = ((flags & GSOCK_LOST_FLAG) != 0);
- break;
+ wxFD_ZERO(pwritefds);
+ wxFD_SET(m_fd, pwritefds);
}
- // Wait more?
- current_time = wxDateTime::UNow();
- int time_left = time_limit - ((current_time.GetTicks() * 1000) + current_time.GetMillisecond());
- if ((!timeout) || (time_left <= 0) || (m_interrupt))
- done = true;
- else
+ 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) )
{
- if (has_event_loop)
- {
- PROCESS_EVENTS();
- }
- else
- {
- // If there's less than 50 ms left, just call select with that timeout.
- if (time_left < 50)
- m_socket->SetTimeout(time_left);
- }
+ m_establishing = false;
+
+ return wxSOCKET_LOST_FLAG & flags;
}
- }
- // Set timeout back to original value (we overwrote it for polling)
- if (!has_event_loop)
- m_socket->SetTimeout(m_timeout*1000);
+ 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;
- return valid_result;
+ 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;
+}
+
+int
+wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags)
+{
+ // 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);
+}
+
+int
+wxSocketBase::DoWait(long timeout, wxSocketEventFlags flags)
+{
+ wxCHECK_MSG( m_impl, -1, "can't wait on invalid socket" );
+
+ // 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;
+
+
+ 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)
{
- return _Wait(seconds, milliseconds, GSOCK_INPUT_FLAG |
- GSOCK_OUTPUT_FLAG |
- GSOCK_CONNECTION_FLAG |
- GSOCK_LOST_FLAG);
+ return DoWait(seconds, milliseconds,
+ wxSOCKET_INPUT_FLAG |
+ wxSOCKET_OUTPUT_FLAG |
+ wxSOCKET_CONNECTION_FLAG) != 0;
}
bool wxSocketBase::WaitForRead(long seconds, long milliseconds)
{
- // Check pushback buffer before entering _Wait
- if (m_unread)
- return true;
+ // Check pushback buffer before entering DoWait
+ if ( m_unread )
+ return true;
- // Note that GSOCK_INPUT_LOST has to be explicitly passed to
- // _Wait because 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.
+ // 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 _Wait(seconds, milliseconds, GSOCK_INPUT_FLAG |
- GSOCK_LOST_FLAG);
+ return DoWait(seconds, milliseconds, wxSOCKET_INPUT_FLAG) != 0;
}
bool wxSocketBase::WaitForWrite(long seconds, long milliseconds)
{
- return _Wait(seconds, milliseconds, GSOCK_OUTPUT_FLAG);
+ if ( m_impl->Select(wxSOCKET_OUTPUT_FLAG) )
+ return true;
+
+ return DoWait(seconds, milliseconds, wxSOCKET_OUTPUT_FLAG) != 0;
}
bool wxSocketBase::WaitForLost(long seconds, long milliseconds)
{
- return _Wait(seconds, milliseconds, GSOCK_LOST_FLAG);
+ return DoWait(seconds, milliseconds, wxSOCKET_LOST_FLAG) == -1;
}
// --------------------------------------------------------------------------
// Get local or peer address
//
-bool wxSocketBase::GetPeer(wxSockAddress& addr_man) const
+bool wxSocketBase::GetPeer(wxSockAddress& addr) const
{
- GAddress *peer;
+ wxCHECK_MSG( m_impl, false, "invalid socket" );
- if (!m_socket)
- return false;
-
- peer = m_socket->GetPeer();
-
- // copying a null address would just trigger an assert anyway
-
- if (!peer)
- return false;
+ const wxSockAddressImpl& peer = m_impl->GetPeer();
+ if ( !peer.IsOk() )
+ return false;
- addr_man.SetAddress(peer);
- GAddress_destroy(peer);
+ addr.SetAddress(peer);
- return true;
+ return true;
}
-bool wxSocketBase::GetLocal(wxSockAddress& addr_man) const
+bool wxSocketBase::GetLocal(wxSockAddress& addr) const
{
- GAddress *local;
+ wxCHECK_MSG( m_impl, false, "invalid socket" );
- if (!m_socket)
+ const wxSockAddressImpl& local = m_impl->GetLocal();
+ if ( !local.IsOk() )
return false;
- local = m_socket->GetLocal();
- addr_man.SetAddress(local);
- GAddress_destroy(local);
+ addr.SetAddress(local);
return true;
}
{
m_timeout = seconds;
- if (m_socket)
- m_socket->SetTimeout(m_timeout * 1000);
+ if (m_impl)
+ m_impl->SetTimeout(m_timeout * 1000);
}
void wxSocketBase::SetFlags(wxSocketFlags flags)
{
+ // 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;
}
// 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.
+ wxSocketEventFlags flag = 0;
+ switch ( notification )
+ {
+ case wxSOCKET_INPUT:
+ flag = wxSOCKET_INPUT_FLAG;
+ break;
- switch(notification)
- {
- case wxSOCKET_CONNECTION:
- m_establishing = false;
- m_connected = true;
- break;
+ case wxSOCKET_OUTPUT:
+ flag = wxSOCKET_OUTPUT_FLAG;
+ 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_CONNECTION:
+ flag = wxSOCKET_CONNECTION_FLAG;
- case wxSOCKET_INPUT:
- if (m_reading || !m_socket->Select(GSOCK_INPUT_FLAG))
- return;
- break;
+ // we're now successfully connected
+ m_connected = true;
+ m_establishing = false;
- case wxSOCKET_OUTPUT:
- if (m_writing || !m_socket->Select(GSOCK_OUTPUT_FLAG))
- return;
- break;
+ // error was previously set to wxSOCKET_WOULDBLOCK, but this is not
+ // the case any longer
+ SetError(wxSOCKET_NOERROR);
+ break;
- case wxSOCKET_LOST:
- m_connected = false;
- m_establishing = false;
- break;
+ case wxSOCKET_LOST:
+ flag = wxSOCKET_LOST_FLAG;
- default:
- break;
- }
+ // if we lost the connection the socket is now closed and not
+ // connected any more
+ m_connected = false;
+ m_closed = true;
+ break;
- // Schedule the event
+ default:
+ wxFAIL_MSG( "unknown wxSocket notification" );
+ }
- wxSocketEventFlags flag = 0;
- wxUnusedVar(flag);
- 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;
- }
+ // remember the events which were generated for this socket, we're going to
+ // use this in DoWait()
+ m_eventsgot |= flag;
- if (((m_eventmask & flag) == flag) && m_notify)
- {
- if (m_handler)
+ // send the wx event if enabled and we're interested in it
+ if ( m_notify && (m_eventmask & flag) && m_handler )
{
- wxSocketEvent event(m_id);
- event.m_event = notification;
- event.m_clientData = m_clientData;
- event.SetEventObject(this);
+ // 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);
+ m_handler->AddPendingEvent(event);
}
- }
}
void wxSocketBase::Notify(bool notify)
void wxSocketBase::Pushback(const void *buffer, wxUint32 size)
{
- if (!size) return;
+ if (!size) return;
- if (m_unread == NULL)
- m_unread = malloc(size);
- else
- {
- void *tmp;
+ 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);
+ tmp = malloc(m_unrd_size + size);
+ memcpy((char *)tmp + size, m_unread, m_unrd_size);
+ free(m_unread);
- m_unread = tmp;
- }
+ m_unread = tmp;
+ }
- m_unrd_size += size;
+ m_unrd_size += size;
- memcpy(m_unread, buffer, size);
+ memcpy(m_unread, buffer, size);
}
wxUint32 wxSocketBase::GetPushback(void *buffer, wxUint32 size, bool peek)
{
- if (!m_unrd_size)
- return 0;
+ wxCHECK_MSG( buffer, 0, "NULL buffer" );
- if (size > (m_unrd_size-m_unrd_cur))
- size = m_unrd_size-m_unrd_cur;
+ if (!m_unrd_size)
+ return 0;
- memcpy(buffer, (char *)m_unread + m_unrd_cur, size);
+ if (size > (m_unrd_size-m_unrd_cur))
+ size = m_unrd_size-m_unrd_cur;
- if (!peek)
- {
- m_unrd_cur += size;
- if (m_unrd_size == m_unrd_cur)
+ memcpy(buffer, (char *)m_unread + m_unrd_cur, size);
+
+ if (!peek)
{
- free(m_unread);
- m_unread = NULL;
- m_unrd_size = 0;
- m_unrd_cur = 0;
+ 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;
}
// Ctor
// --------------------------------------------------------------------------
-wxSocketServer::wxSocketServer(const wxSockAddress& addr_man,
+wxSocketServer::wxSocketServer(const wxSockAddress& addr,
wxSocketFlags flags)
: wxSocketBase(flags, wxSOCKET_SERVER)
{
- wxLogTrace( wxTRACE_Socket, _T("Opening wxSocketServer") );
+ wxLogTrace( wxTRACE_Socket, wxT("Opening wxSocketServer") );
- m_socket = GSocket_new();
+ wxSocketManager * const manager = wxSocketManager::Get();
+ m_impl = manager ? manager->CreateSocket(*this) : NULL;
- if (!m_socket)
+ if (!m_impl)
{
- wxLogTrace( wxTRACE_Socket, _T("*** GSocket_new failed") );
+ wxLogTrace( wxTRACE_Socket, wxT("*** Failed to create m_impl") );
return;
}
- // Setup the socket as server
-
- m_socket->SetLocal(addr_man.GetAddress());
+ // Setup the socket as server
+ m_impl->SetLocal(addr.GetAddress());
if (GetFlags() & wxSOCKET_REUSEADDR) {
- m_socket->SetReusable();
+ m_impl->SetReusable();
+ }
+ if (GetFlags() & wxSOCKET_BROADCAST) {
+ m_impl->SetBroadcast();
+ }
+ if (GetFlags() & wxSOCKET_NOBIND) {
+ m_impl->DontDoBind();
}
- if (m_socket->SetServer() != GSOCK_NOERROR)
+ if (m_impl->CreateServer() != wxSOCKET_NOERROR)
{
- delete m_socket;
- m_socket = NULL;
+ wxDELETE(m_impl);
- wxLogTrace( wxTRACE_Socket, _T("*** GSocket_SetServer failed") );
+ wxLogTrace( wxTRACE_Socket, wxT("*** CreateServer() failed") );
return;
}
- m_socket->SetTimeout(m_timeout * 1000);
- m_socket->SetCallback(GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
- GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG,
- wx_socket_callback, (char *)this);
+ wxLogTrace( wxTRACE_Socket, wxT("wxSocketServer on fd %d"), m_impl->m_fd );
}
// --------------------------------------------------------------------------
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);
- // 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)
- m_socket->SetNonBlocking(1);
+ if ( wait )
+ {
+ // wait until we get a connection
+ if ( !m_impl->SelectWithTimeout(wxSOCKET_INPUT_FLAG) )
+ {
+ SetError(wxSOCKET_TIMEDOUT);
- child_socket = m_socket->WaitConnection();
+ return false;
+ }
+ }
- if (!wait)
- m_socket->SetNonBlocking(0);
+ sock.m_impl = m_impl->Accept(sock);
- if (!child_socket)
- return false;
+ if ( !sock.m_impl )
+ {
+ SetError(m_impl->GetLastError());
- sock.m_type = wxSOCKET_BASE;
- sock.m_socket = child_socket;
- sock.m_connected = true;
+ return false;
+ }
- sock.m_socket->SetTimeout(sock.m_timeout * 1000);
- sock.m_socket->SetCallback(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(m_flags);
+ sock->SetFlags(m_flags);
- if (!AcceptWith(*sock, wait))
- {
- sock->Destroy();
- sock = 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;
}
bool wxSocketBase::GetOption(int level, int optname, void *optval, int *optlen)
{
- wxASSERT_MSG( m_socket, _T("Socket not initialised") );
+ wxASSERT_MSG( m_impl, wxT("Socket not initialised") );
- if (m_socket->GetSockOpt(level, optname, optval, optlen)
- != GSOCK_NOERROR)
- {
+ SOCKOPTLEN_T lenreal = *optlen;
+ if ( getsockopt(m_impl->m_fd, level, optname,
+ static_cast<char *>(optval), &lenreal) != 0 )
return false;
- }
+
+ *optlen = lenreal;
+
return true;
}
-bool wxSocketBase::SetOption(int level, int optname, const void *optval,
- int optlen)
+bool
+wxSocketBase::SetOption(int level, int optname, const void *optval, int optlen)
{
- wxASSERT_MSG( m_socket, _T("Socket not initialised") );
-
- if (m_socket->SetSockOpt(level, optname, optval, optlen)
- != GSOCK_NOERROR)
- {
- return false;
- }
- return true;
+ wxASSERT_MSG( m_impl, wxT("Socket not initialised") );
+
+ return setsockopt(m_impl->m_fd, level, optname,
+ static_cast<const char *>(optval), optlen) == 0;
}
-bool wxSocketBase::SetLocal(wxIPV4address& local)
+bool wxSocketBase::SetLocal(const wxIPV4address& local)
{
- GAddress* la = local.GetAddress();
-
- // If the address is valid, save it for use when we call Connect
- if (la && la->m_addr)
- {
m_localAddress = local;
return true;
- }
-
- return false;
}
// ==========================================================================
wxSocketClient::wxSocketClient(wxSocketFlags flags)
: wxSocketBase(flags, wxSOCKET_CLIENT)
{
-}
-
-wxSocketClient::~wxSocketClient()
-{
+ m_initialRecvBufferSize =
+ m_initialSendBufferSize = -1;
}
// --------------------------------------------------------------------------
// Connect
// --------------------------------------------------------------------------
-bool wxSocketClient::DoConnect(wxSockAddress& addr_man, wxSockAddress* local, bool wait)
+bool wxSocketClient::DoConnect(const wxSockAddress& remote,
+ const wxSockAddress* local,
+ bool wait)
{
- GSocketError err;
-
- if (m_socket)
- {
- // Shutdown and destroy the socket
- Close();
- delete m_socket;
- }
-
- m_socket = GSocket_new();
- m_connected = false;
- m_establishing = false;
-
- if (!m_socket)
- return false;
+ if ( m_impl )
+ {
+ // Shutdown and destroy the old socket
+ Close();
+ delete m_impl;
+ }
- m_socket->SetTimeout(m_timeout * 1000);
- m_socket->SetCallback(GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
- GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG,
- wx_socket_callback, (char *)this);
+ m_connected = false;
+ m_establishing = false;
- // If wait == false, then the call should be nonblocking.
- // When we are finished, we put the socket to blocking mode
- // again.
+ // Create and set up the new one
+ wxSocketManager * const manager = wxSocketManager::Get();
+ m_impl = manager ? manager->CreateSocket(*this) : NULL;
+ if ( !m_impl )
+ return false;
- if (!wait)
- m_socket->SetNonBlocking(1);
+ // 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();
- // Reuse makes sense for clients too, if we are trying to rebind to the same port
- if (GetFlags() & wxSOCKET_REUSEADDR)
- {
- m_socket->SetReusable();
- }
+ // 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;
- // If no local address was passed and one has been set, use the one that was Set
- if (!local && m_localAddress.GetAddress())
- {
- local = &m_localAddress;
- }
+ if ( local )
+ m_impl->SetLocal(local->GetAddress());
- // Bind to the local IP address and port, when provided
- if (local)
- {
- GAddress* la = local->GetAddress();
+ m_impl->SetInitialSocketBuffers(m_initialRecvBufferSize, m_initialSendBufferSize);
- if (la && la->m_addr)
- m_socket->SetLocal(la);
- }
+ m_impl->SetPeer(remote.GetAddress());
- m_socket->SetPeer(addr_man.GetAddress());
- err = m_socket->Connect(GSOCK_STREAMED);
+ // Finally do create the socket and connect to the peer
+ const wxSocketError err = m_impl->CreateClient(wait);
- if (!wait)
- m_socket->SetNonBlocking(0);
+ 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(wxSockAddress& addr_man, bool wait)
+bool wxSocketClient::Connect(const wxSockAddress& remote, bool wait)
{
- return (DoConnect(addr_man, NULL, wait));
+ return DoConnect(remote, NULL, wait);
}
-bool wxSocketClient::Connect(wxSockAddress& addr_man, wxSockAddress& local, bool wait)
+bool wxSocketClient::Connect(const wxSockAddress& remote,
+ const wxSockAddress& local,
+ bool wait)
{
- return (DoConnect(addr_man, &local, wait));
+ return DoConnect(remote, &local, wait);
}
bool wxSocketClient::WaitOnConnect(long seconds, long milliseconds)
{
- if (m_connected) // Already connected
+ 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 |
- GSOCK_LOST_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;
}
// ==========================================================================
// wxDatagramSocket
// ==========================================================================
-/* NOTE: experimental stuff - might change */
-
wxDatagramSocket::wxDatagramSocket( const wxSockAddress& addr,
wxSocketFlags flags )
: wxSocketBase( flags, wxSOCKET_DATAGRAM )
{
// Create the socket
- m_socket = GSocket_new();
+ wxSocketManager * const manager = wxSocketManager::Get();
+ m_impl = manager ? manager->CreateSocket(*this) : NULL;
- if(!m_socket)
- {
- wxFAIL_MSG( _T("datagram socket not new'd") );
+ if (!m_impl)
return;
- }
+
// Setup the socket as non connection oriented
- m_socket->SetLocal(addr.GetAddress());
- if( m_socket->SetNonOriented() != GSOCK_NOERROR )
+ m_impl->SetLocal(addr.GetAddress());
+ if (flags & wxSOCKET_REUSEADDR)
+ {
+ m_impl->SetReusable();
+ }
+ if (GetFlags() & wxSOCKET_BROADCAST)
{
- delete m_socket;
- m_socket = NULL;
+ m_impl->SetBroadcast();
+ }
+ if (GetFlags() & wxSOCKET_NOBIND)
+ {
+ m_impl->DontDoBind();
+ }
+
+ if ( m_impl->CreateUDP() != wxSOCKET_NOERROR )
+ {
+ wxDELETE(m_impl);
return;
}
// Initialize all stuff
m_connected = false;
m_establishing = false;
- m_socket->SetTimeout( m_timeout );
- m_socket->SetCallback( GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
- GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG,
- wx_socket_callback, (char*)this );
}
wxDatagramSocket& wxDatagramSocket::RecvFrom( wxSockAddress& addr,
const void* buf,
wxUint32 nBytes )
{
- wxASSERT_MSG( m_socket, _T("Socket not initialised") );
-
- m_socket->SetPeer(addr.GetAddress());
+ wxASSERT_MSG( m_impl, wxT("Socket not initialised") );
+
+ m_impl->SetPeer(addr.GetAddress());
Write(buf, nBytes);
return (*this);
}
public:
virtual bool OnInit()
{
- // wxSocketBase will call GSocket_Init() itself when/if needed
+ // wxSocketBase will call Initialize() itself only if sockets are
+ // really used, don't do it from here
return true;
}
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 __WXMSW__
+ 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