X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2ecf902bc836f2808444b34eff48cdb12f289460..55129143a164e44f832c7438c79310ebe26675d5:/src/common/socket.cpp diff --git a/src/common/socket.cpp b/src/common/socket.cpp index f4f42cc31f..228fe79a28 100644 --- a/src/common/socket.cpp +++ b/src/common/socket.cpp @@ -1,46 +1,105 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: socket.cpp +// Name: src/common/socket.cpp // Purpose: Socket handler classes // Authors: Guilhem Lavaux, Guillermo Rodriguez Garcia // Created: April 1997 // Copyright: (C) 1999-1997, Guilhem Lavaux -// (C) 2000-1999, Guillermo Rodriguez Garcia +// (C) 1999-2000, Guillermo Rodriguez Garcia +// (C) 2008 Vadim Zeitlin // RCS_ID: $Id$ -// License: see wxWindows licence +// License: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ========================================================================== // Declarations // ========================================================================== -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -#pragma implementation "socket.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif #if wxUSE_SOCKETS -#include "wx/app.h" -#include "wx/apptrait.h" -#include "wx/defs.h" -#include "wx/object.h" -#include "wx/string.h" -#include "wx/timer.h" -#include "wx/utils.h" -#include "wx/module.h" -#include "wx/log.h" -#include "wx/intl.h" -#include "wx/event.h" +#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/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 +#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" @@ -50,29 +109,13 @@ WX_CHECK_BUILD_OPTIONS("wxNet") // 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 @@ -84,6 +127,21 @@ IMPLEMENT_CLASS(wxSocketClient, wxSocketBase) 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 // -------------------------------------------------------------------------- @@ -91,17 +149,599 @@ IMPLEMENT_DYNAMIC_CLASS(wxSocketEvent, wxEvent) 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: + // 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: - wxSocketState() : wxObject() {} + 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; - DECLARE_NO_COPY_CLASS(wxSocketState) + 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); + } + +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(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(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(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(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 // ========================================================================== @@ -110,62 +750,53 @@ public: // 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 ) + 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(); } } @@ -175,614 +806,715 @@ void wxSocketBase::Shutdown() 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(); + + SetFlags(flags); - m_flags = flags; - m_type = type; + 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 GSocket object - if (m_socket) - delete m_socket; + // Destroy the implementation object + delete m_impl; - // 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(); + // 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; + } + + 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); - - // 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); + wxSocketReadGuard read(this); - // Allow read events from now on - m_reading = false; + m_lcount = DoRead(buffer, nbytes); - 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(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 ) + 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(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) +/* + 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) { - GSocketEventFlags result; - long timeout; - - // Set this to true to interrupt ongoing waits - m_interrupt = false; + if ( m_fd == INVALID_SOCKET ) + return (wxSOCKET_LOST_FLAG & flags); - // Check for valid socket - if (!m_socket) - return false; + struct timeval tv; + if ( timeout ) + tv = *timeout; + else + tv.tv_sec = tv.tv_usec = 0; - // Check for valid timeout value. - if (seconds != -1) - timeout = seconds * 1000 + milliseconds; - else - timeout = m_timeout * 1000; + // 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 !defined(wxUSE_GUI) || !wxUSE_GUI - m_socket->SetTimeout(timeout); -#endif + if ( flags & wxSOCKET_INPUT_FLAG ) + { + preadfds = &readfds; + wxFD_ZERO(preadfds); + wxFD_SET(m_fd, preadfds); + } - // 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. + // when using non-blocking connect() the socket becomes connected + // (successfully or not) when it becomes writable + if ( flags & (wxSOCKET_OUTPUT_FLAG | wxSOCKET_CONNECTION_FLAG) ) + { + pwritefds = &writefds; + wxFD_ZERO(pwritefds); + wxFD_SET(m_fd, pwritefds); + } - wxStopWatch chrono; - bool done = false; + wxFD_ZERO(&exceptfds); + wxFD_SET(m_fd, &exceptfds); - while (!done) - { - result = m_socket->Select(flags | GSOCK_LOST_FLAG); + const int rc = select(m_fd + 1, preadfds, pwritefds, &exceptfds, &tv); - // Incoming connection (server) or connection established (client) - if (result & GSOCK_CONNECTION_FLAG) + // check for errors first + if ( rc == -1 || wxFD_ISSET(m_fd, &exceptfds) ) { - m_connected = true; - m_establishing = false; - return true; + m_establishing = false; + + return wxSOCKET_LOST_FLAG & flags; } - // Data available or output buffer ready - if ((result & GSOCK_INPUT_FLAG) || (result & GSOCK_OUTPUT_FLAG)) + 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) ) { - return true; + // 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; + } } - // Connection lost - if (result & GSOCK_LOST_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 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) + if ( !m_impl->IsServer() && !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 { - m_connected = false; - m_establishing = false; - return (flags & GSOCK_LOST_FLAG) != 0; + // We never dispatch messages from threads other than the main one. + eventLoop = NULL; } - // Wait more? - if ((!timeout) || (chrono.Time() > timeout) || (m_interrupt)) - done = true; - else - PROCESS_EVENTS(); - } + // 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 - return false; + 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 becuase of the semantics of WaitForRead: a return - // value of true means that a GSocket_Read call will return - // immediately, not that there is actually data to read. + // 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; } // -------------------------------------------------------------------------- @@ -793,38 +1525,30 @@ bool wxSocketBase::WaitForLost(long seconds, long milliseconds) // 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) - return false; + 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; + return true; } // @@ -833,36 +1557,36 @@ bool wxSocketBase::GetLocal(wxSockAddress& addr_man) const void wxSocketBase::SaveState() { - wxSocketState *state; + wxSocketState *state; - state = new wxSocketState(); + state = new wxSocketState(); - state->m_flags = m_flags; - state->m_notify = m_notify; - state->m_eventmask = m_eventmask; - state->m_clientData = m_clientData; + state->m_flags = m_flags; + state->m_notify = m_notify; + state->m_eventmask = m_eventmask; + state->m_clientData = m_clientData; - m_states.Append(state); + m_states.Append(state); } void wxSocketBase::RestoreState() { - wxList::compatibility_iterator node; - wxSocketState *state; + wxList::compatibility_iterator node; + wxSocketState *state; - node = m_states.GetLast(); - if (!node) - return; + node = m_states.GetLast(); + if (!node) + return; - state = (wxSocketState *)node->GetData(); + state = (wxSocketState *)node->GetData(); - m_flags = state->m_flags; - m_notify = state->m_notify; - m_eventmask = state->m_eventmask; - m_clientData = state->m_clientData; + 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; + m_states.Erase(node); + delete state; } // @@ -871,15 +1595,22 @@ void wxSocketBase::RestoreState() void wxSocketBase::SetTimeout(long seconds) { - m_timeout = seconds; + 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) { - m_flags = 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; } @@ -887,114 +1618,83 @@ void wxSocketBase::SetFlags(wxSocketFlags 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) { - m_notify = notify; + m_notify = notify; } void wxSocketBase::SetNotify(wxSocketEventFlags flags) { - m_eventmask = flags; + m_eventmask = flags; } void wxSocketBase::SetEventHandler(wxEvtHandler& handler, int id) { - m_handler = &handler; - m_id = id; + m_handler = &handler; + m_id = id; } // -------------------------------------------------------------------------- @@ -1003,49 +1703,51 @@ void wxSocketBase::SetEventHandler(wxEvtHandler& handler, int id) 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; } @@ -1057,41 +1759,44 @@ wxUint32 wxSocketBase::GetPushback(void *buffer, wxUint32 size, bool peek) // Ctor // -------------------------------------------------------------------------- -wxSocketServer::wxSocketServer(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; + delete m_impl; + m_impl = NULL; - 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 ); } // -------------------------------------------------------------------------- @@ -1100,76 +1805,88 @@ wxSocketServer::wxSocketServer(wxSockAddress& addr_man, 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) { - if (m_socket->GetSockOpt(level, optname, optval, optlen) - != GSOCK_NOERROR) - { + wxASSERT_MSG( m_impl, wxT("Socket not initialised") ); + + SOCKOPTLEN_T lenreal = *optlen; + if ( getsockopt(m_impl->m_fd, level, optname, + static_cast(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) { - if (m_socket->SetSockOpt(level, optname, optval, optlen) - != GSOCK_NOERROR) - { - return false; - } + wxASSERT_MSG( m_impl, wxT("Socket not initialised") ); + + return setsockopt(m_impl->m_fd, level, optname, + static_cast(optval), optlen) == 0; +} + +bool wxSocketBase::SetLocal(const wxIPV4address& local) +{ + m_localAddress = local; + return true; } @@ -1184,111 +1901,143 @@ bool wxSocketBase::SetOption(int level, int optname, const void *optval, wxSocketClient::wxSocketClient(wxSocketFlags flags) : wxSocketBase(flags, wxSOCKET_CLIENT) { -} - -wxSocketClient::~wxSocketClient() -{ + m_initialRecvBufferSize = + m_initialSendBufferSize = -1; } // -------------------------------------------------------------------------- // Connect // -------------------------------------------------------------------------- -bool wxSocketClient::Connect(wxSockAddress& addr_man, bool wait) +bool wxSocketClient::DoConnect(const wxSockAddress& remote, + const wxSockAddress* local, + bool wait) { - GSocketError err; + if ( m_impl ) + { + // Shutdown and destroy the old socket + Close(); + delete m_impl; + } - if (m_socket) - { - // Shutdown and destroy the socket - Close(); - delete m_socket; - } + m_connected = false; + m_establishing = false; - m_socket = GSocket_new(); - m_connected = false; - m_establishing = false; + // 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 (!m_socket) - return 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(); - 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); + // 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 wait == false, then the call should be nonblocking. - // When we are finished, we put the socket to blocking mode - // again. + if ( local ) + m_impl->SetLocal(local->GetAddress()); - if (!wait) - m_socket->SetNonBlocking(1); + m_impl->SetInitialSocketBuffers(m_initialRecvBufferSize, m_initialSendBufferSize); - m_socket->SetPeer(addr_man.GetAddress()); - err = m_socket->Connect(GSOCK_STREAMED); + m_impl->SetPeer(remote.GetAddress()); - if (!wait) - m_socket->SetNonBlocking(0); + // Finally do create the socket and connect to the peer + const wxSocketError err = m_impl->CreateClient(wait); - if (err != GSOCK_NOERROR) - { - if (err == GSOCK_WOULDBLOCK) - m_establishing = true; + if ( err != wxSOCKET_NOERROR ) + { + if ( err == wxSOCKET_WOULDBLOCK ) + { + wxASSERT_MSG( !wait, "shouldn't get this for blocking connect" ); - return false; - } + m_establishing = true; + } - m_connected = true; - return true; + return false; + } + + 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 | - 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( wxSockAddress& addr, +wxDatagramSocket::wxDatagramSocket( const wxSockAddress& addr, wxSocketFlags flags ) : wxSocketBase( flags, wxSOCKET_DATAGRAM ) { - // Create the socket - m_socket = GSocket_new(); - - if(!m_socket) - { - wxASSERT_MSG( 0, _T("datagram socket not new'd") ); - return; - } - // Setup the socket as non connection oriented - m_socket->SetLocal(addr.GetAddress()); - if( m_socket->SetNonOriented() != GSOCK_NOERROR ) - { - delete m_socket; - m_socket = NULL; - 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 ); + // 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(); + } + + if ( m_impl->CreateUDP() != wxSOCKET_NOERROR ) + { + delete m_impl; + m_impl = NULL; + return; + } + + // Initialize all stuff + m_connected = false; + m_establishing = false; } wxDatagramSocket& wxDatagramSocket::RecvFrom( wxSockAddress& addr, @@ -1300,11 +2049,13 @@ wxDatagramSocket& wxDatagramSocket::RecvFrom( wxSockAddress& addr, return (*this); } -wxDatagramSocket& wxDatagramSocket::SendTo( wxSockAddress& addr, +wxDatagramSocket& wxDatagramSocket::SendTo( const wxSockAddress& addr, const void* buf, wxUint32 nBytes ) { - m_socket->SetPeer(addr.GetAddress()); + wxASSERT_MSG( m_impl, wxT("Socket not initialised") ); + + m_impl->SetPeer(addr.GetAddress()); Write(buf, nBytes); return (*this); } @@ -1318,7 +2069,8 @@ class wxSocketModule : public wxModule 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; } @@ -1334,7 +2086,21 @@ private: 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 + +// and for OSXManagerSetter in the OS X one +#ifdef __WXOSX__ + wxFORCE_LINK_MODULE( osxsocket ) #endif - // wxUSE_SOCKETS -// vi:sts=4:sw=4:et +#endif // wxUSE_SOCKETS