X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4f61df823f1c16f7678be5a67f1fa4e29d90c5ff..81533a3af6ed598c32a35e1c1c2b60f4908f5541:/src/common/socket.cpp diff --git a/src/common/socket.cpp b/src/common/socket.cpp index aba83174a4..228fe79a28 100644 --- a/src/common/socket.cpp +++ b/src/common/socket.cpp @@ -63,10 +63,40 @@ #ifdef MSG_NOSIGNAL #define wxSOCKET_MSG_NOSIGNAL MSG_NOSIGNAL #else // MSG_NOSIGNAL not available (BSD including OS X) - #if defined(__UNIX__) && !defined(SO_NOSIGPIPE) && !defined( __VMS ) - #error "Writing to socket could generate unhandled SIGPIPE." - #error "Please post information about your system to wx-dev." - #endif + // 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 @@ -85,7 +115,7 @@ wxDEFINE_EVENT(wxEVT_SOCKET, wxSocketEvent); // discard buffer #define MAX_DISCARD_SIZE (10 * 1024) -#define wxTRACE_Socket _T("wxSocket") +#define wxTRACE_Socket wxT("wxSocket") // -------------------------------------------------------------------------- // wxWin macros @@ -127,7 +157,7 @@ public: public: wxSocketState() : wxObject() {} - DECLARE_NO_COPY_CLASS(wxSocketState) + wxDECLARE_NO_COPY_CLASS(wxSocketState); }; // wxSocketWaitModeChanger: temporarily change the socket flags affecting its @@ -163,7 +193,7 @@ private: wxSocketBase * const m_socket; const int m_oldflags; - DECLARE_NO_COPY_CLASS(wxSocketWaitModeChanger) + wxDECLARE_NO_COPY_CLASS(wxSocketWaitModeChanger); }; // wxSocketRead/WriteGuard are instantiated before starting reading @@ -183,13 +213,17 @@ public: { m_socket->m_reading = false; - m_socket->m_impl->ReenableEvents(wxSOCKET_INPUT_FLAG); + // 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(wxSocketReadGuard) + wxDECLARE_NO_COPY_CLASS(wxSocketReadGuard); }; class wxSocketWriteGuard @@ -201,19 +235,21 @@ public: wxASSERT_MSG( !m_socket->m_writing, "write reentrancy?" ); m_socket->m_writing = true; - - m_socket->m_impl->ReenableEvents(wxSOCKET_OUTPUT_FLAG); } ~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; - DECLARE_NO_COPY_CLASS(wxSocketWriteGuard) + wxDECLARE_NO_COPY_CLASS(wxSocketWriteGuard); }; // ============================================================================ @@ -334,6 +370,14 @@ void wxSocketImpl::PostCreation() 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 ) { @@ -489,7 +533,14 @@ wxSocketImpl *wxSocketImpl::Accept(wxSocketBase& wxsocket) if ( fd == INVALID_SOCKET ) return NULL; - wxSocketImpl * const sock = Create(wxsocket); + 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); @@ -613,6 +664,10 @@ int wxSocketImpl::RecvStream(void *buffer, int size) 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) ); @@ -695,36 +750,48 @@ int wxSocketImpl::Write(const void *buffer, int size) // 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++ ) + wxCHECK_MSG( wxIsMainThread(), false, + "must be called from the main thread" ); + + if ( !gs_socketInitCount ) { wxSocketManager * const manager = wxSocketManager::Get(); if ( !manager || !manager->OnInit() ) - { - m_countInit--; - return false; - } } + gs_socketInitCount++; + return true; } void wxSocketBase::Shutdown() { - // we should be initialized - wxASSERT_MSG( m_countInit > 0, _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 ) { wxSocketManager * const manager = wxSocketManager::Get(); wxCHECK_RET( manager, "should have a socket manager" ); @@ -766,12 +833,16 @@ void wxSocketBase::Init() m_eventmask = m_eventsgot = 0; - if ( !IsInitialized() ) + // 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() ) { - // this Initialize() will be undone by wxSocketModule::OnExit(), all - // the other calls to it should be matched by a call to Shutdown() - if (!Initialize()) - wxLogError("Cannot initialize wxSocketBase"); + if ( !Initialize() ) + { + wxLogError(_("Cannot initialize sockets")); + } } } @@ -791,12 +862,6 @@ wxSocketBase::wxSocketBase(wxSocketFlags flags, wxSocketType 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(); @@ -805,8 +870,7 @@ wxSocketBase::~wxSocketBase() delete m_impl; // Free the pushback buffer - if (m_unread) - free(m_unread); + free(m_unread); } bool wxSocketBase::Destroy() @@ -822,14 +886,13 @@ bool wxSocketBase::Destroy() // Suppress events from now on Notify(false); - // schedule this object for deletion - wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL; - if ( traits ) + // Schedule this object for deletion instead of destroying it right now if + // possible as we may have other events pending for it + if ( wxTheApp ) { - // let the traits object decide what to do with us - traits->ScheduleForDestroy(this); + wxTheApp->ScheduleForDestruction(this); } - else // no app or no traits + else // no app { // in wxBase we might have no app object at all, don't leak memory delete this; @@ -908,7 +971,9 @@ wxUint32 wxSocketBase::DoRead(void* buffer_, wxUint32 nbytes) // 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_connected ? m_impl->Read(buffer, nbytes) : 0; + const int ret = !m_impl->m_stream || m_connected + ? m_impl->Read(buffer, nbytes) + : 0; if ( ret == -1 ) { if ( m_impl->GetLastError() == wxSOCKET_WOULDBLOCK ) @@ -1044,6 +1109,9 @@ wxSocketBase& wxSocketBase::Peek(void* buffer, wxUint32 nbytes) { wxSocketReadGuard read(this); + // Peek() should never block + wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT); + m_lcount = DoRead(buffer, nbytes); Pushback(buffer, m_lcount); @@ -1073,7 +1141,7 @@ wxUint32 wxSocketBase::DoWrite(const void *buffer_, wxUint32 nbytes) wxUint32 total = 0; while ( nbytes ) { - if ( !m_connected ) + if ( m_impl->m_stream && !m_connected ) { if ( (m_flags & wxSOCKET_WAITALL) || !total ) SetError(wxSOCKET_IOERR); @@ -1304,8 +1372,10 @@ wxSocketBase::DoWait(long timeout, wxSocketEventFlags flags) { wxCHECK_MSG( m_impl, -1, "can't wait on invalid socket" ); - // we're never going to become ready if we're not connected (any more) - if ( !m_connected && !m_establishing ) + // 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. @@ -1328,6 +1398,20 @@ wxSocketBase::DoWait(long timeout, wxSocketEventFlags flags) 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) @@ -1549,20 +1633,29 @@ void wxSocketBase::OnRequest(wxSocketNotify notification) case wxSOCKET_CONNECTION: flag = wxSOCKET_CONNECTION_FLAG; + + // we're now successfully connected + m_connected = true; + m_establishing = false; + + // error was previously set to wxSOCKET_WOULDBLOCK, but this is not + // the case any longer + SetError(wxSOCKET_NOERROR); break; case wxSOCKET_LOST: flag = wxSOCKET_LOST_FLAG; + + // if we lost the connection the socket is now closed and not + // connected any more + m_connected = false; + m_closed = true; break; default: wxFAIL_MSG( "unknown wxSocket notification" ); } - // if we lost the connection the socket is now closed - if ( notification == wxSOCKET_LOST ) - m_closed = true; - // remember the events which were generated for this socket, we're going to // use this in DoWait() m_eventsgot |= flag; @@ -1670,13 +1763,14 @@ wxSocketServer::wxSocketServer(const wxSockAddress& addr, wxSocketFlags flags) : wxSocketBase(flags, wxSOCKET_SERVER) { - wxLogTrace( wxTRACE_Socket, _T("Opening wxSocketServer") ); + wxLogTrace( wxTRACE_Socket, wxT("Opening wxSocketServer") ); - m_impl = wxSocketImpl::Create(*this); + wxSocketManager * const manager = wxSocketManager::Get(); + m_impl = manager ? manager->CreateSocket(*this) : NULL; if (!m_impl) { - wxLogTrace( wxTRACE_Socket, _T("*** Failed to create m_impl") ); + wxLogTrace( wxTRACE_Socket, wxT("*** Failed to create m_impl") ); return; } @@ -1698,11 +1792,11 @@ wxSocketServer::wxSocketServer(const wxSockAddress& addr, delete m_impl; m_impl = NULL; - wxLogTrace( wxTRACE_Socket, _T("*** CreateServer() failed") ); + wxLogTrace( wxTRACE_Socket, wxT("*** CreateServer() failed") ); return; } - wxLogTrace( wxTRACE_Socket, _T("wxSocketServer on fd %d"), m_impl->m_fd ); + wxLogTrace( wxTRACE_Socket, wxT("wxSocketServer on fd %d"), m_impl->m_fd ); } // -------------------------------------------------------------------------- @@ -1768,7 +1862,7 @@ bool wxSocketServer::WaitForAccept(long seconds, long milliseconds) bool wxSocketBase::GetOption(int level, int optname, void *optval, int *optlen) { - wxASSERT_MSG( m_impl, _T("Socket not initialised") ); + wxASSERT_MSG( m_impl, wxT("Socket not initialised") ); SOCKOPTLEN_T lenreal = *optlen; if ( getsockopt(m_impl->m_fd, level, optname, @@ -1783,7 +1877,7 @@ bool wxSocketBase::GetOption(int level, int optname, void *optval, int *optlen) bool wxSocketBase::SetOption(int level, int optname, const void *optval, int optlen) { - wxASSERT_MSG( m_impl, _T("Socket not initialised") ); + wxASSERT_MSG( m_impl, wxT("Socket not initialised") ); return setsockopt(m_impl->m_fd, level, optname, static_cast(optval), optlen) == 0; @@ -1830,7 +1924,8 @@ bool wxSocketClient::DoConnect(const wxSockAddress& remote, m_establishing = false; // Create and set up the new one - m_impl = wxSocketImpl::Create(*this); + wxSocketManager * const manager = wxSocketManager::Get(); + m_impl = manager ? manager->CreateSocket(*this) : NULL; if ( !m_impl ) return false; @@ -1912,7 +2007,8 @@ wxDatagramSocket::wxDatagramSocket( const wxSockAddress& addr, : wxSocketBase( flags, wxSOCKET_DATAGRAM ) { // Create the socket - m_impl = wxSocketImpl::Create(*this); + wxSocketManager * const manager = wxSocketManager::Get(); + m_impl = manager ? manager->CreateSocket(*this) : NULL; if (!m_impl) return; @@ -1957,7 +2053,7 @@ wxDatagramSocket& wxDatagramSocket::SendTo( const wxSockAddress& addr, const void* buf, wxUint32 nBytes ) { - wxASSERT_MSG( m_impl, _T("Socket not initialised") ); + wxASSERT_MSG( m_impl, wxT("Socket not initialised") ); m_impl->SetPeer(addr.GetAddress()); Write(buf, nBytes); @@ -1997,4 +2093,14 @@ IMPLEMENT_DYNAMIC_CLASS(wxSocketModule, wxModule) 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 + #endif // wxUSE_SOCKETS