X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/60ee01727442e8b364825cd965a3e06c21f07833..bfad4a154618ba95472ccb6ebdd3aa9829c0ecd8:/src/common/socket.cpp diff --git a/src/common/socket.cpp b/src/common/socket.cpp index d2ea4f5009..d17ce8f2ed 100644 --- a/src/common/socket.cpp +++ b/src/common/socket.cpp @@ -4,7 +4,8 @@ // 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 ///////////////////////////////////////////////////////////////////////////// @@ -42,6 +43,9 @@ #include "wx/thread.h" #include "wx/evtloop.h" +#include "wx/private/fd.h" +#include "wx/private/socket.h" + // DLL options compatibility check: #include "wx/build.h" WX_CHECK_BUILD_OPTIONS("wxNet") @@ -83,14 +87,39 @@ public: DECLARE_NO_COPY_CLASS(wxSocketState) }; +// Conditionally make the socket non-blocking for the lifetime of this object. +class wxSocketUnblocker +{ +public: + wxSocketUnblocker(wxSocketImpl *socket, bool unblock = true) + : m_impl(socket), + m_unblock(unblock) + { + if ( m_unblock ) + m_impl->SetNonBlocking(true); + } + + ~wxSocketUnblocker() + { + if ( m_unblock ) + m_impl->SetNonBlocking(false); + } + +private: + wxSocketImpl * const m_impl; + bool m_unblock; + + DECLARE_NO_COPY_CLASS(wxSocketUnblocker) +}; + // ============================================================================ -// GSocketManager +// wxSocketManager // ============================================================================ -GSocketManager *GSocketManager::ms_manager = NULL; +wxSocketManager *wxSocketManager::ms_manager = NULL; /* static */ -void GSocketManager::Set(GSocketManager *manager) +void wxSocketManager::Set(wxSocketManager *manager) { wxASSERT_MSG( !ms_manager, "too late to set manager now" ); @@ -98,7 +127,7 @@ void GSocketManager::Set(GSocketManager *manager) } /* static */ -void GSocketManager::Init() +void wxSocketManager::Init() { wxASSERT_MSG( !ms_manager, "shouldn't be initialized twice" ); @@ -127,6 +156,353 @@ void GSocketManager::Init() ms_manager = app->GetTraits()->GetSocketManager(); } +// ========================================================================== +// wxSocketImpl +// ========================================================================== + +wxSocketImpl::wxSocketImpl(wxSocketBase& wxsocket) + : m_wxsocket(&wxsocket) +{ + m_fd = INVALID_SOCKET; + m_detected = 0; + m_local = NULL; + m_peer = NULL; + m_error = wxSOCKET_NOERROR; + m_server = false; + m_stream = true; + m_non_blocking = false; + + 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(); + + if (m_local) + GAddress_destroy(m_local); + + if (m_peer) + GAddress_destroy(m_peer); +} + +bool wxSocketImpl::PreCreateCheck(GAddress *addr) +{ + if ( m_fd != INVALID_SOCKET ) + { + m_error = wxSOCKET_INVSOCK; + return false; + } + + if ( !addr || !addr->m_addr ) + { + 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); + + // FIXME: shouldn't we check for m_non_blocking here? as it is now, all our + // sockets are non-blocking + UnblockAndRegisterWithEventLoop(); +} + +wxSocketError wxSocketImpl::UpdateLocalAddress() +{ + WX_SOCKLEN_T lenAddr; + if ( getsockname(m_fd, m_local->m_addr, &lenAddr) != 0 ) + { + Close(); + m_error = wxSOCKET_IOERR; + return m_error; + } + + m_local->m_len = lenAddr; + + 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->m_realfamily, 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->m_addr, m_local->m_len) != 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() +{ + if ( !PreCreateCheck(m_peer) ) + return m_error; + + m_fd = socket(m_peer->m_realfamily, 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 && m_local->m_addr ) + { + if ( bind(m_fd, m_local->m_addr, m_local->m_len) != 0 ) + { + Close(); + m_error = wxSOCKET_IOERR; + return m_error; + } + } + + // Connect to the peer and handle the EWOULDBLOCK return value in + // platform-specific code + return DoHandleConnect(connect(m_fd, m_peer->m_addr, m_peer->m_len)); +} + + +wxSocketError wxSocketImpl::CreateUDP() +{ + if ( !PreCreateCheck(m_local) ) + return m_error; + + m_stream = false; + m_server = false; + + m_fd = socket(m_local->m_realfamily, 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->m_addr, m_local->m_len) != 0 ) + { + Close(); + m_error = wxSOCKET_IOERR; + return m_error; + } + + return UpdateLocalAddress(); + } + + return wxSOCKET_NOERROR; +} + + +void wxSocketImpl::Close() +{ + if ( m_fd != INVALID_SOCKET ) + { + DoClose(); + m_fd = INVALID_SOCKET; + } +} + +/* + * Disallow further read/write operations on this socket, close + * the fd and disable all callbacks. + */ +void wxSocketImpl::Shutdown() +{ + if ( m_fd != INVALID_SOCKET ) + { + shutdown(m_fd, 1 /* SD_SEND */); + Close(); + } + + m_detected = wxSOCKET_LOST_FLAG; +} + +/* + * Sets the timeout for blocking calls. Time is expressed in + * milliseconds. + */ +void wxSocketImpl::SetTimeout(unsigned long millis) +{ + m_timeout.tv_sec = (millis / 1000); + m_timeout.tv_usec = (millis % 1000) * 1000; +} + +void wxSocketImpl::NotifyOnStateChange(wxSocketNotify event) +{ + m_wxsocket->OnRequest(event); +} + +/* Address handling */ + +/* + * Set or get the local or peer address for this socket. The 'set' + * functions return wxSOCKET_NOERROR on success, an error code otherwise. + * The 'get' functions return a pointer to a GAddress object on success, + * or NULL otherwise, in which case they set the error code of the + * corresponding socket. + * + * Error codes: + * wxSOCKET_INVSOCK - the socket is not valid. + * wxSOCKET_INVADDR - the address is not valid. + */ +wxSocketError wxSocketImpl::SetLocal(GAddress *address) +{ + /* 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; + } + + /* check address */ + if (address == NULL || address->m_family == wxSOCKET_NOFAMILY) + { + m_error = wxSOCKET_INVADDR; + return wxSOCKET_INVADDR; + } + + if (m_local) + GAddress_destroy(m_local); + + m_local = GAddress_copy(address); + + return wxSOCKET_NOERROR; +} + +wxSocketError wxSocketImpl::SetPeer(GAddress *address) +{ + /* check address */ + if (address == NULL || address->m_family == wxSOCKET_NOFAMILY) + { + m_error = wxSOCKET_INVADDR; + return wxSOCKET_INVADDR; + } + + if (m_peer) + GAddress_destroy(m_peer); + + m_peer = GAddress_copy(address); + + return wxSOCKET_NOERROR; +} + +GAddress *wxSocketImpl::GetLocal() +{ + GAddress *address; + wxSockAddr addr; + WX_SOCKLEN_T size = sizeof(addr); + wxSocketError err; + + /* try to get it from the m_local var first */ + if (m_local) + return GAddress_copy(m_local); + + /* else, if the socket is initialized, try getsockname */ + if (m_fd == INVALID_SOCKET) + { + m_error = wxSOCKET_INVSOCK; + return NULL; + } + + if (getsockname(m_fd, (sockaddr*)&addr, &size) == SOCKET_ERROR) + { + m_error = wxSOCKET_IOERR; + return NULL; + } + + /* got a valid address from getsockname, create a GAddress object */ + if ((address = GAddress_new()) == NULL) + { + m_error = wxSOCKET_MEMERR; + return NULL; + } + + if ((err = _GAddress_translate_from(address, (sockaddr*)&addr, size)) != wxSOCKET_NOERROR) + { + GAddress_destroy(address); + m_error = err; + return NULL; + } + + return address; +} + +GAddress *wxSocketImpl::GetPeer() +{ + /* try to get it from the m_peer var */ + if (m_peer) + return GAddress_copy(m_peer); + + return NULL; +} + // ========================================================================== // wxSocketBase // ========================================================================== @@ -148,7 +524,8 @@ bool wxSocketBase::Initialize() { if ( !m_countInit++ ) { - if ( !GSocket_Init() ) + wxSocketManager * const manager = wxSocketManager::Get(); + if ( !manager || !manager->OnInit() ) { m_countInit--; @@ -165,7 +542,10 @@ void wxSocketBase::Shutdown() wxASSERT_MSG( m_countInit > 0, _T("extra call to Shutdown()") ); if ( --m_countInit == 0 ) { - GSocket_Cleanup(); + wxSocketManager * const manager = wxSocketManager::Get(); + wxCHECK_RET( manager, "should have a socket manager" ); + + manager->OnExit(); } } @@ -175,7 +555,7 @@ void wxSocketBase::Shutdown() void wxSocketBase::Init() { - m_socket = NULL; + m_impl = NULL; m_type = wxSOCKET_UNINIT; // state @@ -219,8 +599,9 @@ wxSocketBase::wxSocketBase(wxSocketFlags flags, wxSocketType type) { Init(); - m_flags = flags; - m_type = type; + SetFlags(flags); + + m_type = type; } wxSocketBase::~wxSocketBase() @@ -235,9 +616,8 @@ wxSocketBase::~wxSocketBase() 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) @@ -273,6 +653,15 @@ bool wxSocketBase::Destroy() return true; } +// ---------------------------------------------------------------------------- +// simply accessors +// ---------------------------------------------------------------------------- + +wxSocketError wxSocketBase::LastError() const +{ + return m_impl->GetError(); +} + // -------------------------------------------------------------------------- // Basic IO calls // -------------------------------------------------------------------------- @@ -287,19 +676,8 @@ bool wxSocketBase::Close() // Interrupt pending waits InterruptWait(); - if (m_socket) - { - // Disable callbacks - m_socket->UnsetCallback( - GSOCK_INPUT_FLAG | - GSOCK_OUTPUT_FLAG | - GSOCK_LOST_FLAG | - GSOCK_CONNECTION_FLAG - ); - - // Shutdown the connection - m_socket->Shutdown(); - } + if (m_impl) + m_impl->Shutdown(); m_connected = false; m_establishing = false; @@ -311,7 +689,7 @@ wxSocketBase& wxSocketBase::Read(void* buffer, wxUint32 nbytes) // Mask read events m_reading = true; - m_lcount = _Read(buffer, nbytes); + m_lcount = DoRead(buffer, nbytes); // If in wxSOCKET_WAITALL mode, all bytes should have been read. if (m_flags & wxSOCKET_WAITALL) @@ -325,37 +703,31 @@ wxSocketBase& wxSocketBase::Read(void* buffer, wxUint32 nbytes) return *this; } -wxUint32 wxSocketBase::_Read(void* buffer_, wxUint32 nbytes) +wxUint32 wxSocketBase::DoRead(void* buffer_, wxUint32 nbytes) { - char *buffer = (char *)buffer_; + // We use pointer arithmetic here which doesn't work with void pointers. + char *buffer = static_cast(buffer_); - int total; - - // Try the pushback buffer first - total = GetPushback(buffer, nbytes, false); + // 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 = (char *)buffer + total; + buffer += total; - // Return now in one of the following cases: - // - the socket is invalid, - // - we got all the data - if ( !m_socket || - !nbytes ) + // If it's indeed closed or if read everything, there is nothing more to do. + if ( !m_impl || !nbytes ) return 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(buffer, nbytes); - m_socket->SetNonBlocking(0); + wxCHECK_MSG( buffer, 0, "NULL buffer" ); + + // wxSOCKET_NOWAIT overrides all the other flags and means that we are + // polling the socket and don't block at all. + if ( m_flags & wxSOCKET_NOWAIT ) + { + wxSocketUnblocker unblock(m_impl); + int ret = m_impl->Read(buffer, nbytes); if ( ret < 0 ) return 0; @@ -365,11 +737,13 @@ wxUint32 wxSocketBase::_Read(void* buffer_, wxUint32 nbytes) { for ( ;; ) { - // dispatch events unless disabled + // Wait until socket becomes ready for reading dispatching the GUI + // events in the meanwhile unless wxSOCKET_BLOCK was explicitly + // specified to disable this. if ( !(m_flags & wxSOCKET_BLOCK) && !WaitForRead() ) break; - ret = m_socket->Read(buffer, nbytes); + const int ret = m_impl->Read(buffer, nbytes); if ( ret == 0 ) { // for connection-oriented (e.g. TCP) sockets we can only read @@ -388,18 +762,18 @@ wxUint32 wxSocketBase::_Read(void* buffer_, wxUint32 nbytes) total += ret; - // if wxSOCKET_WAITALL is not set, we can leave now as we did read - // something + // If wxSOCKET_WAITALL is not set, we can leave now as we did read + // something and we don't need to wait for all nbytes bytes to be + // read. if ( !(m_flags & wxSOCKET_WAITALL) ) break; - // otherwise check if read the maximal requested amount of data + // Otherwise continue reading until we do read everything. nbytes -= ret; if ( !nbytes ) break; - // we didn't, so continue reading - buffer = (char *)buffer + ret; + buffer += ret; } } @@ -425,7 +799,7 @@ wxSocketBase& wxSocketBase::ReadMsg(void* buffer, wxUint32 nbytes) old_flags = m_flags; SetFlags((m_flags & wxSOCKET_BLOCK) | wxSOCKET_WAITALL); - if (_Read(&msg, sizeof(msg)) != sizeof(msg)) + if (DoRead(&msg, sizeof(msg)) != sizeof(msg)) goto exit; sig = (wxUint32)msg.sig[0]; @@ -455,7 +829,7 @@ wxSocketBase& wxSocketBase::ReadMsg(void* buffer, wxUint32 nbytes) // Don't attempt to read if the msg was zero bytes long. if (len) { - total = _Read(buffer, len); + total = DoRead(buffer, len); if (total != len) goto exit; @@ -470,7 +844,7 @@ wxSocketBase& wxSocketBase::ReadMsg(void* buffer, wxUint32 nbytes) do { discard_len = ((len2 > MAX_DISCARD_SIZE)? MAX_DISCARD_SIZE : len2); - discard_len = _Read(discard_buffer, (wxUint32)discard_len); + discard_len = DoRead(discard_buffer, (wxUint32)discard_len); len2 -= (wxUint32)discard_len; } while ((discard_len > 0) && len2); @@ -480,7 +854,7 @@ wxSocketBase& wxSocketBase::ReadMsg(void* buffer, wxUint32 nbytes) if (len2 != 0) goto exit; } - if (_Read(&msg, sizeof(msg)) != sizeof(msg)) + if (DoRead(&msg, sizeof(msg)) != sizeof(msg)) goto exit; sig = (wxUint32)msg.sig[0]; @@ -511,7 +885,7 @@ wxSocketBase& wxSocketBase::Peek(void* buffer, wxUint32 nbytes) // Mask read events m_reading = true; - m_lcount = _Read(buffer, nbytes); + m_lcount = DoRead(buffer, nbytes); Pushback(buffer, m_lcount); // If in wxSOCKET_WAITALL mode, all bytes should have been read. @@ -531,7 +905,7 @@ wxSocketBase& wxSocketBase::Write(const void *buffer, wxUint32 nbytes) // Mask write events m_writing = true; - m_lcount = _Write(buffer, nbytes); + m_lcount = DoWrite(buffer, nbytes); // If in wxSOCKET_WAITALL mode, all bytes should have been written. if (m_flags & wxSOCKET_WAITALL) @@ -545,31 +919,25 @@ wxSocketBase& wxSocketBase::Write(const void *buffer, wxUint32 nbytes) 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, please see comments there +wxUint32 wxSocketBase::DoWrite(const void *buffer_, wxUint32 nbytes) { - const char *buffer = (const char *)buffer_; - - wxUint32 total = 0; + const char *buffer = static_cast(buffer_); - // If the socket is invalid or parameters are ill, return immediately - if (!m_socket || !buffer || !nbytes) + // Return if there is nothing to read or the socket is (already?) closed. + if ( !m_impl || !nbytes ) return 0; - // 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(buffer, nbytes); - m_socket->SetNonBlocking(0); + wxCHECK_MSG( buffer, 0, "NULL buffer" ); - if (ret > 0) - total = ret; + wxUint32 total = 0; + if ( m_flags & wxSOCKET_NOWAIT ) + { + wxSocketUnblocker unblock(m_impl); + const int ret = m_impl->Write(buffer, nbytes); + if ( ret > 0 ) + total += ret; } else // blocking socket { @@ -578,9 +946,7 @@ wxUint32 wxSocketBase::_Write(const void *buffer_, wxUint32 nbytes) if ( !(m_flags & wxSOCKET_BLOCK) && !WaitForWrite() ) break; - ret = m_socket->Write(buffer, nbytes); - - // see comments for similar logic for ret handling in _Read() + const int ret = m_impl->Write(buffer, nbytes); if ( ret == 0 ) { m_closed = true; @@ -588,9 +954,7 @@ wxUint32 wxSocketBase::_Write(const void *buffer_, wxUint32 nbytes) } if ( ret < 0 ) - { return 0; - } total += ret; if ( !(m_flags & wxSOCKET_WAITALL) ) @@ -600,7 +964,7 @@ wxUint32 wxSocketBase::_Write(const void *buffer_, wxUint32 nbytes) if ( !nbytes ) break; - buffer = (const char *)buffer + ret; + buffer += ret; } } @@ -634,10 +998,10 @@ wxSocketBase& wxSocketBase::WriteMsg(const void *buffer, wxUint32 nbytes) msg.len[2] = (unsigned char) ((nbytes >> 16) & 0xff); msg.len[3] = (unsigned char) ((nbytes >> 24) & 0xff); - if (_Write(&msg, sizeof(msg)) < sizeof(msg)) + if (DoWrite(&msg, sizeof(msg)) < sizeof(msg)) goto exit; - total = _Write(buffer, nbytes); + total = DoWrite(buffer, nbytes); if (total < nbytes) goto exit; @@ -651,7 +1015,7 @@ wxSocketBase& wxSocketBase::WriteMsg(const void *buffer, wxUint32 nbytes) msg.len[2] = msg.len[3] = (char) 0; - if ((_Write(&msg, sizeof(msg))) < sizeof(msg)) + if ((DoWrite(&msg, sizeof(msg))) < sizeof(msg)) goto exit; // everything was OK @@ -689,7 +1053,7 @@ wxSocketBase& wxSocketBase::Discard() do { - ret = _Read(buffer, MAX_DISCARD_SIZE); + ret = DoRead(buffer, MAX_DISCARD_SIZE); total += ret; } while (ret == MAX_DISCARD_SIZE); @@ -708,7 +1072,113 @@ wxSocketBase& wxSocketBase::Discard() // Wait functions // -------------------------------------------------------------------------- -// All Wait functions poll the socket using GSocket_Select() to +/* + * Polls the socket to determine its status. This function will + * check for the events specified in the 'flags' parameter, and + * it will return a mask indicating which operations can be + * performed. This function won't block, regardless of the + * mode (blocking | nonblocking) of the socket. + */ +wxSocketEventFlags wxSocketImpl::Select(wxSocketEventFlags flags) +{ + assert(this); + + wxSocketEventFlags result = 0; + fd_set readfds; + fd_set writefds; + fd_set exceptfds; + struct timeval tv; + + if (m_fd == -1) + return (wxSOCKET_LOST_FLAG & flags); + + /* Do not use a static struct, Linux can garble it */ + tv.tv_sec = 0; + tv.tv_usec = 0; + + wxFD_ZERO(&readfds); + wxFD_ZERO(&writefds); + wxFD_ZERO(&exceptfds); + wxFD_SET(m_fd, &readfds); + if (flags & wxSOCKET_OUTPUT_FLAG || flags & wxSOCKET_CONNECTION_FLAG) + wxFD_SET(m_fd, &writefds); + wxFD_SET(m_fd, &exceptfds); + + /* Check 'sticky' CONNECTION flag first */ + result |= wxSOCKET_CONNECTION_FLAG & m_detected; + + /* If we have already detected a LOST event, then don't try + * to do any further processing. + */ + if ((m_detected & wxSOCKET_LOST_FLAG) != 0) + { + m_establishing = false; + return (wxSOCKET_LOST_FLAG & flags); + } + + /* Try select now */ + if (select(m_fd + 1, &readfds, &writefds, &exceptfds, &tv) < 0) + { + /* What to do here? */ + return (result & flags); + } + + /* Check for exceptions and errors */ + if (wxFD_ISSET(m_fd, &exceptfds)) + { + m_establishing = false; + m_detected = wxSOCKET_LOST_FLAG; + + /* LOST event: Abort any further processing */ + return (wxSOCKET_LOST_FLAG & flags); + } + + /* Check for readability */ + if (wxFD_ISSET(m_fd, &readfds)) + { + result |= wxSOCKET_INPUT_FLAG; + + if (m_server && m_stream) + { + /* This is a TCP server socket that detected a connection. + While the INPUT_FLAG is also set, it doesn't matter on + this kind of sockets, as we can only Accept() from them. */ + m_detected |= wxSOCKET_CONNECTION_FLAG; + } + } + + /* Check for writability */ + if (wxFD_ISSET(m_fd, &writefds)) + { + 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) + { + m_detected = wxSOCKET_LOST_FLAG; + + /* LOST event: Abort any further processing */ + return (wxSOCKET_LOST_FLAG & flags); + } + else + { + m_detected |= wxSOCKET_CONNECTION_FLAG; + } + } + else + { + result |= wxSOCKET_OUTPUT_FLAG; + } + } + + return (result | m_detected) & flags; +} + +// All Wait functions poll the socket using 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 runs the event loop so that @@ -717,7 +1187,7 @@ wxSocketBase& wxSocketBase::Discard() bool wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags) { - wxCHECK_MSG( m_socket, false, "can't wait on invalid socket" ); + wxCHECK_MSG( m_impl, false, "can't wait on invalid socket" ); // This can be set to true from Interrupt() to exit this function a.s.a.p. m_interrupt = false; @@ -737,11 +1207,6 @@ wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags) if ( wxIsMainThread() ) { eventLoop = wxEventLoop::GetActive(); - -#ifdef __WXMSW__ - wxASSERT_MSG( eventLoop, - "Sockets won't work without a running event loop" ); -#endif // __WXMSW__ } else // in worker thread { @@ -755,13 +1220,13 @@ wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags) for ( ;; ) { // We always stop waiting when the connection is lost as it doesn't - // make sense to continue further, even if GSOCK_LOST_FLAG is not + // make sense to continue further, even if wxSOCKET_LOST_FLAG is not // specified in flags to wait for. - const GSocketEventFlags - result = m_socket->Select(flags | GSOCK_LOST_FLAG); + const wxSocketEventFlags + result = m_impl->Select(flags | wxSOCKET_LOST_FLAG); // Incoming connection (server) or connection established (client)? - if ( result & GSOCK_CONNECTION_FLAG ) + if ( result & wxSOCKET_CONNECTION_FLAG ) { m_connected = true; m_establishing = false; @@ -770,18 +1235,18 @@ wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags) } // Data available or output buffer ready? - if ( (result & GSOCK_INPUT_FLAG) || (result & GSOCK_OUTPUT_FLAG) ) + if ( (result & wxSOCKET_INPUT_FLAG) || (result & wxSOCKET_OUTPUT_FLAG) ) { gotEvent = true; break; } // Connection lost - if ( result & GSOCK_LOST_FLAG ) + if ( result & wxSOCKET_LOST_FLAG ) { m_connected = false; m_establishing = false; - if ( flags & GSOCK_LOST_FLAG ) + if ( flags & wxSOCKET_LOST_FLAG ) gotEvent = true; break; } @@ -796,10 +1261,9 @@ wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags) if ( eventLoop ) { - // Dispatch the events when we run in the main thread and have an - // active event loop: without this sockets don't work at all under - // MSW as socket flags are only updated when socket messages are - // processed. + // This function is only called if wxSOCKET_BLOCK flag was not used + // and so we should dispatch the events if there is an event loop + // capable of doing it. if ( eventLoop->Pending() ) eventLoop->Dispatch(); } @@ -819,10 +1283,10 @@ wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags) bool wxSocketBase::Wait(long seconds, long milliseconds) { return DoWait(seconds, milliseconds, - GSOCK_INPUT_FLAG | - GSOCK_OUTPUT_FLAG | - GSOCK_CONNECTION_FLAG | - GSOCK_LOST_FLAG + wxSOCKET_INPUT_FLAG | + wxSOCKET_OUTPUT_FLAG | + wxSOCKET_CONNECTION_FLAG | + wxSOCKET_LOST_FLAG ); } @@ -832,22 +1296,22 @@ bool wxSocketBase::WaitForRead(long seconds, long milliseconds) if ( m_unread ) return true; - // Note that GSOCK_INPUT_LOST has to be explicitly passed to DoWait + // Note that wxSOCKET_INPUT_LOST has to be explicitly passed to DoWait // because of the semantics of WaitForRead: a return value of true means - // that a GSocket_Read call will return immediately, not that there is + // that a Read call will return immediately, not that there is // actually data to read. - return DoWait(seconds, milliseconds, GSOCK_INPUT_FLAG | GSOCK_LOST_FLAG); + return DoWait(seconds, milliseconds, wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG); } bool wxSocketBase::WaitForWrite(long seconds, long milliseconds) { - return DoWait(seconds, milliseconds, GSOCK_OUTPUT_FLAG | GSOCK_LOST_FLAG); + return DoWait(seconds, milliseconds, wxSOCKET_OUTPUT_FLAG | wxSOCKET_LOST_FLAG); } bool wxSocketBase::WaitForLost(long seconds, long milliseconds) { - return DoWait(seconds, milliseconds, GSOCK_LOST_FLAG); + return DoWait(seconds, milliseconds, wxSOCKET_LOST_FLAG); } // -------------------------------------------------------------------------- @@ -862,10 +1326,10 @@ bool wxSocketBase::GetPeer(wxSockAddress& addr_man) const { GAddress *peer; - if (!m_socket) + if (!m_impl) return false; - peer = m_socket->GetPeer(); + peer = m_impl->GetPeer(); // copying a null address would just trigger an assert anyway @@ -882,10 +1346,10 @@ bool wxSocketBase::GetLocal(wxSockAddress& addr_man) const { GAddress *local; - if (!m_socket) + if (!m_impl) return false; - local = m_socket->GetLocal(); + local = m_impl->GetLocal(); addr_man.SetAddress(local); GAddress_destroy(local); @@ -938,12 +1402,19 @@ void wxSocketBase::SetTimeout(long 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) { + // 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; } @@ -952,34 +1423,6 @@ 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) { switch(notification) @@ -994,12 +1437,12 @@ void wxSocketBase::OnRequest(wxSocketNotify notification) // which are no longer valid. case wxSOCKET_INPUT: - if (m_reading || !m_socket->Select(GSOCK_INPUT_FLAG)) + if (m_reading || !m_impl->Select(wxSOCKET_INPUT_FLAG)) return; break; case wxSOCKET_OUTPUT: - if (m_writing || !m_socket->Select(GSOCK_OUTPUT_FLAG)) + if (m_writing || !m_impl->Select(wxSOCKET_OUTPUT_FLAG)) return; break; @@ -1007,6 +1450,10 @@ void wxSocketBase::OnRequest(wxSocketNotify notification) m_connected = false; m_establishing = false; break; + + case wxSOCKET_MAX_EVENT: + wxFAIL_MSG( "unexpected notification" ); + return; } // Schedule the event @@ -1015,10 +1462,10 @@ void wxSocketBase::OnRequest(wxSocketNotify notification) 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; + case wxSOCKET_INPUT: flag = wxSOCKET_INPUT_FLAG; break; + case wxSOCKET_OUTPUT: flag = wxSOCKET_OUTPUT_FLAG; break; + case wxSOCKET_CONNECTION: flag = wxSOCKET_CONNECTION_FLAG; break; + case wxSOCKET_LOST: flag = wxSOCKET_LOST_FLAG; break; default: wxLogWarning(_("wxSocket: unknown event!.")); return; @@ -1041,8 +1488,8 @@ void wxSocketBase::OnRequest(wxSocketNotify notification) void wxSocketBase::Notify(bool notify) { m_notify = notify; - if (m_socket) - m_socket->Notify(notify); + if (m_impl) + m_impl->Notify(notify); } void wxSocketBase::SetNotify(wxSocketEventFlags flags) @@ -1084,6 +1531,8 @@ void wxSocketBase::Pushback(const void *buffer, wxUint32 size) wxUint32 wxSocketBase::GetPushback(void *buffer, wxUint32 size, bool peek) { + wxCHECK_MSG( buffer, 0, "NULL buffer" ); + if (!m_unrd_size) return 0; @@ -1122,43 +1571,38 @@ wxSocketServer::wxSocketServer(const wxSockAddress& addr_man, { wxLogTrace( wxTRACE_Socket, _T("Opening wxSocketServer") ); - m_socket = GSocket_new(); + m_impl = wxSocketImpl::Create(*this); - if (!m_socket) + if (!m_impl) { - wxLogTrace( wxTRACE_Socket, _T("*** GSocket_new failed") ); + wxLogTrace( wxTRACE_Socket, _T("*** Failed to create m_impl") ); return; } // Setup the socket as server - m_socket->Notify(m_notify); - m_socket->SetLocal(addr_man.GetAddress()); + m_impl->Notify(m_notify); + m_impl->SetLocal(addr_man.GetAddress()); if (GetFlags() & wxSOCKET_REUSEADDR) { - m_socket->SetReusable(); + m_impl->SetReusable(); } if (GetFlags() & wxSOCKET_BROADCAST) { - m_socket->SetBroadcast(); + m_impl->SetBroadcast(); } if (GetFlags() & wxSOCKET_NOBIND) { - m_socket->DontDoBind(); + 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, _T("*** 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, _T("wxSocketServer on fd %d"), m_socket->m_fd ); + wxLogTrace( wxTRACE_Socket, _T("wxSocketServer on fd %d"), m_impl->m_fd ); } // -------------------------------------------------------------------------- @@ -1167,35 +1611,21 @@ wxSocketServer::wxSocketServer(const wxSockAddress& addr_man, bool wxSocketServer::AcceptWith(wxSocketBase& sock, bool wait) { - GSocket *child_socket; - - if (!m_socket) + if (!m_impl) return false; // If wait == false, then the call should be nonblocking. // When we are finished, we put the socket to blocking mode // again. + wxSocketUnblocker unblock(m_impl, !wait); + sock.m_impl = m_impl->WaitConnection(sock); - if (!wait) - m_socket->SetNonBlocking(1); - - child_socket = m_socket->WaitConnection(); - - if (!wait) - m_socket->SetNonBlocking(0); - - if (!child_socket) + if ( !sock.m_impl ) return false; sock.m_type = wxSOCKET_BASE; - sock.m_socket = child_socket; sock.m_connected = true; - 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); - return true; } @@ -1216,32 +1646,30 @@ wxSocketBase *wxSocketServer::Accept(bool wait) bool wxSocketServer::WaitForAccept(long seconds, long milliseconds) { - return DoWait(seconds, milliseconds, GSOCK_CONNECTION_FLAG); + return DoWait(seconds, milliseconds, wxSOCKET_CONNECTION_FLAG); } bool wxSocketBase::GetOption(int level, int optname, void *optval, int *optlen) { - wxASSERT_MSG( m_socket, _T("Socket not initialised") ); + wxASSERT_MSG( m_impl, _T("Socket not initialised") ); - if (m_socket->GetSockOpt(level, optname, optval, optlen) - != GSOCK_NOERROR) - { + SOCKOPTLEN_T lenreal; + 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) { - wxASSERT_MSG( m_socket, _T("Socket not initialised") ); + wxASSERT_MSG( m_impl, _T("Socket not initialised") ); - if (m_socket->SetSockOpt(level, optname, optval, optlen) - != GSOCK_NOERROR) - { - return false; - } - return true; + return setsockopt(m_impl->m_fd, level, optname, + static_cast(optval), optlen) == 0; } bool wxSocketBase::SetLocal(const wxIPV4address& local) @@ -1286,50 +1714,36 @@ bool wxSocketClient::DoConnect(const wxSockAddress& addr_man, const wxSockAddress* local, bool wait) { - GSocketError err; - - if (m_socket) + if (m_impl) { // Shutdown and destroy the socket Close(); - delete m_socket; + delete m_impl; } - m_socket = GSocket_new(); + m_impl = wxSocketImpl::Create(*this); m_connected = false; m_establishing = false; - if (!m_socket) + if (!m_impl) return false; - 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 - ); - // If wait == false, then the call should be nonblocking. When we are // finished, we put the socket to blocking mode again. - - if (!wait) - m_socket->SetNonBlocking(1); + wxSocketUnblocker unblock(m_impl, !wait); // Reuse makes sense for clients too, if we are trying to rebind to the same port if (GetFlags() & wxSOCKET_REUSEADDR) { - m_socket->SetReusable(); + m_impl->SetReusable(); } if (GetFlags() & wxSOCKET_BROADCAST) { - m_socket->SetBroadcast(); + m_impl->SetBroadcast(); } if (GetFlags() & wxSOCKET_NOBIND) { - m_socket->DontDoBind(); + m_impl->DontDoBind(); } // If no local address was passed and one has been set, use the one that was Set @@ -1344,25 +1758,20 @@ bool wxSocketClient::DoConnect(const wxSockAddress& addr_man, GAddress* la = local->GetAddress(); if (la && la->m_addr) - m_socket->SetLocal(la); + m_impl->SetLocal(la); } -#if defined(__WXMSW__) || defined(__WXGTK__) - m_socket->SetInitialSocketBuffers(m_initialRecvBufferSize, m_initialSendBufferSize); -#endif + m_impl->SetInitialSocketBuffers(m_initialRecvBufferSize, m_initialSendBufferSize); - m_socket->SetPeer(addr_man.GetAddress()); - err = m_socket->Connect(GSOCK_STREAMED); + m_impl->SetPeer(addr_man.GetAddress()); + const wxSocketError err = m_impl->CreateClient(); - //this will register for callbacks - must be called after m_socket->m_fd was initialized - m_socket->Notify(m_notify); + //this will register for callbacks - must be called after m_impl->m_fd was initialized + m_impl->Notify(m_notify); - if (!wait) - m_socket->SetNonBlocking(0); - - if (err != GSOCK_NOERROR) + if (err != wxSOCKET_NOERROR) { - if (err == GSOCK_WOULDBLOCK) + if (err == wxSOCKET_WOULDBLOCK) m_establishing = true; return false; @@ -1393,64 +1802,57 @@ bool wxSocketClient::WaitOnConnect(long seconds, long milliseconds) return true; } - wxCHECK_MSG( m_establishing && m_socket, false, + wxCHECK_MSG( m_establishing && m_impl, false, "No connection establishment attempt in progress" ); - // we must specify GSOCK_LOST_FLAG here explicitly because we must return + // we must specify wxSOCKET_LOST_FLAG here explicitly because we must return // true if the connection establishment process is finished, whether it is // over because we successfully connected or because we were not able to // connect return DoWait(seconds, milliseconds, - GSOCK_CONNECTION_FLAG | GSOCK_LOST_FLAG); + wxSOCKET_CONNECTION_FLAG | wxSOCKET_LOST_FLAG); } // ========================================================================== // wxDatagramSocket // ========================================================================== -/* NOTE: experimental stuff - might change */ - wxDatagramSocket::wxDatagramSocket( const wxSockAddress& addr, wxSocketFlags flags ) : wxSocketBase( flags, wxSOCKET_DATAGRAM ) { // Create the socket - m_socket = GSocket_new(); + m_impl = wxSocketImpl::Create(*this); - if (!m_socket) - { - wxFAIL_MSG( _T("datagram socket not new'd") ); + if (!m_impl) return; - } - m_socket->Notify(m_notify); + + m_impl->Notify(m_notify); // Setup the socket as non connection oriented - m_socket->SetLocal(addr.GetAddress()); + m_impl->SetLocal(addr.GetAddress()); if (flags & wxSOCKET_REUSEADDR) { - m_socket->SetReusable(); + m_impl->SetReusable(); } if (GetFlags() & wxSOCKET_BROADCAST) { - m_socket->SetBroadcast(); + m_impl->SetBroadcast(); } if (GetFlags() & wxSOCKET_NOBIND) { - m_socket->DontDoBind(); + m_impl->DontDoBind(); } - if ( m_socket->SetNonOriented() != GSOCK_NOERROR ) + + if ( m_impl->CreateUDP() != wxSOCKET_NOERROR ) { - delete m_socket; - m_socket = NULL; + delete m_impl; + m_impl = 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 ); } wxDatagramSocket& wxDatagramSocket::RecvFrom( wxSockAddress& addr, @@ -1466,9 +1868,9 @@ wxDatagramSocket& wxDatagramSocket::SendTo( const wxSockAddress& addr, const void* buf, wxUint32 nBytes ) { - wxASSERT_MSG( m_socket, _T("Socket not initialised") ); + wxASSERT_MSG( m_impl, _T("Socket not initialised") ); - m_socket->SetPeer(addr.GetAddress()); + m_impl->SetPeer(addr.GetAddress()); Write(buf, nBytes); return (*this); } @@ -1482,7 +1884,8 @@ 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; }