X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/17aa2bec08161588a3f9d348f13543a7420a4fc4..c13d6ac1ea199d1e3908d40d129e2fd5a4d82df7:/src/common/socket.cpp diff --git a/src/common/socket.cpp b/src/common/socket.cpp index 26bfa784b5..36a9dc1090 100644 --- a/src/common/socket.cpp +++ b/src/common/socket.cpp @@ -1,1171 +1,2123 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: socket.cpp +// Name: src/common/socket.cpp // Purpose: Socket handler classes // Authors: Guilhem Lavaux, Guillermo Rodriguez Garcia // Created: April 1997 -// Updated: July 1999 -// Copyright: (C) 1999, 1998, 1997, Guilhem Lavaux +// Copyright: (C) 1999-1997, Guilhem Lavaux +// (C) 1999-2000, Guillermo Rodriguez Garcia +// (C) 2008 Vadim Zeitlin // RCS_ID: $Id$ -// License: see wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "socket.h" -#endif +// ========================================================================== +// Declarations +// ========================================================================== // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif #if wxUSE_SOCKETS -///////////////////////////////////////////////////////////////////////////// -// wxWindows headers -///////////////////////////////////////////////////////////////////////////// -#include "wx/defs.h" -#include "wx/object.h" -#include "wx/string.h" -#include "wx/timer.h" -#include "wx/utils.h" -#include "wx/module.h" -#include "wx/log.h" - -#include -#include -#include +#include "wx/socket.h" -///////////////////////////////////////////////////////////////////////////// -// wxSocket headers -///////////////////////////////////////////////////////////////////////////// +#ifndef WX_PRECOMP + #include "wx/object.h" + #include "wx/string.h" + #include "wx/intl.h" + #include "wx/log.h" + #include "wx/event.h" + #include "wx/app.h" + #include "wx/utils.h" + #include "wx/timer.h" + #include "wx/module.h" +#endif + +#include "wx/apptrait.h" #include "wx/sckaddr.h" -#include "wx/socket.h" +#include "wx/stopwatch.h" +#include "wx/thread.h" +#include "wx/evtloop.h" +#include "wx/link.h" + +#include "wx/private/fd.h" +#include "wx/private/socket.h" + +#ifdef __UNIX__ + #include +#endif + +// we use MSG_NOSIGNAL to avoid getting SIGPIPE when sending data to a remote +// host which closed the connection if it is available, otherwise we rely on +// SO_NOSIGPIPE existency +// +// this should cover all the current Unix systems (Windows never sends any +// signals anyhow) but if we find one that has neither we should explicitly +// ignore SIGPIPE for it +// OpenVMS has neither MSG_NOSIGNAL nor SO_NOSIGPIPE. However the socket sample +// seems to work. Not sure if problems will show up on OpenVMS using sockets. +#ifdef MSG_NOSIGNAL + #define wxSOCKET_MSG_NOSIGNAL MSG_NOSIGNAL +#else // MSG_NOSIGNAL not available (BSD including OS X) + // next best possibility is to use SO_NOSIGPIPE socket option, this covers + // BSD systems (including OS X) -- but if we don't have it neither (AIX and + // old HP-UX do not), we have to fall back to the old way of simply + // disabling SIGPIPE temporarily, so define a class to do it in a safe way + #if defined(__UNIX__) && !defined(SO_NOSIGPIPE) + extern "C" { typedef void (*wxSigHandler_t)(int); } + namespace + { + class IgnoreSignal + { + public: + // ctor disables the given signal + IgnoreSignal(int sig) + : m_handler(signal(sig, SIG_IGN)), + m_sig(sig) + { + } + + // dtor restores the old handler + ~IgnoreSignal() + { + signal(m_sig, m_handler); + } + + private: + const wxSigHandler_t m_handler; + const int m_sig; + + wxDECLARE_NO_COPY_CLASS(IgnoreSignal); + }; + } // anonymous namespace + + #define wxNEEDS_IGNORE_SIGPIPE + #endif // Unix without SO_NOSIGPIPE + + #define wxSOCKET_MSG_NOSIGNAL 0 +#endif + +// DLL options compatibility check: +#include "wx/build.h" +WX_CHECK_BUILD_OPTIONS("wxNet") + +// -------------------------------------------------------------------------- +// macros and constants +// -------------------------------------------------------------------------- + +// event +wxDEFINE_EVENT(wxEVT_SOCKET, wxSocketEvent); + +// discard buffer +#define MAX_DISCARD_SIZE (10 * 1024) + +#define wxTRACE_Socket wxT("wxSocket") + +// -------------------------------------------------------------------------- +// wxWin macros +// -------------------------------------------------------------------------- -// -------------------------------------------------------------- -// ClassInfos -// -------------------------------------------------------------- -#if !USE_SHARED_LIBRARY IMPLEMENT_CLASS(wxSocketBase, wxObject) IMPLEMENT_CLASS(wxSocketServer, wxSocketBase) IMPLEMENT_CLASS(wxSocketClient, wxSocketBase) +IMPLEMENT_CLASS(wxDatagramSocket, wxSocketBase) IMPLEMENT_DYNAMIC_CLASS(wxSocketEvent, wxEvent) -#endif + +// ---------------------------------------------------------------------------- +// private functions +// ---------------------------------------------------------------------------- + +namespace +{ + +void SetTimeValFromMS(timeval& tv, unsigned long ms) +{ + tv.tv_sec = (ms / 1000); + tv.tv_usec = (ms % 1000) * 1000; +} + +} // anonymous namespace + +// -------------------------------------------------------------------------- +// private classes +// -------------------------------------------------------------------------- class wxSocketState : public wxObject { public: - bool notify_state; - GSocketEventFlags evt_notify_state; - wxSocketBase::wxSockFlags socket_flags; - wxSocketBase::wxSockCbk c_callback; - char *c_callback_data; + wxSocketFlags m_flags; + wxSocketEventFlags m_eventmask; + bool m_notify; + void *m_clientData; + +public: + wxSocketState() : wxObject() {} + + 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: + wxSocketReadGuard(wxSocketBase *socket) + : m_socket(socket) + { + wxASSERT_MSG( !m_socket->m_reading, "read reentrancy?" ); + + m_socket->m_reading = true; + } + + ~wxSocketReadGuard() + { + m_socket->m_reading = false; + + // connection could have been lost while reading, in this case calling + // ReenableEvents() would assert and is not necessary anyhow + wxSocketImpl * const impl = m_socket->m_impl; + if ( impl && impl->m_fd != INVALID_SOCKET ) + impl->ReenableEvents(wxSOCKET_INPUT_FLAG); + } + +private: + wxSocketBase * const m_socket; + wxDECLARE_NO_COPY_CLASS(wxSocketReadGuard); +}; + +class wxSocketWriteGuard +{ public: - wxSocketState() : wxObject() {} + 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); }; -// -------------------------------------------------------------- -// wxSocketBase ctor and dtor -// -------------------------------------------------------------- +// ============================================================================ +// wxSocketManager +// ============================================================================ -wxSocketBase::wxSocketBase(wxSocketBase::wxSockFlags _flags, - wxSocketBase::wxSockType _type) : - wxEvtHandler(), - m_socket(NULL), m_flags(_flags), m_type(_type), - m_neededreq(0), - m_lcount(0), m_timeout(600), - m_unread(NULL), m_unrd_size(0), m_unrd_cur(0), - m_cbk(NULL), m_cdata(NULL), - m_connected(FALSE), m_establishing(FALSE), - m_notify_state(FALSE), m_id(-1), - m_defering(NO_DEFER), m_error(FALSE), - m_states() +wxSocketManager *wxSocketManager::ms_manager = NULL; + +/* static */ +void wxSocketManager::Set(wxSocketManager *manager) { + wxASSERT_MSG( !ms_manager, "too late to set manager now" ); + + ms_manager = manager; } -wxSocketBase::wxSocketBase() : - wxEvtHandler(), - m_socket(NULL), m_flags(WAITALL | SPEED), m_type(SOCK_UNINIT), - m_neededreq(0), - m_lcount(0), m_timeout(600), - m_unread(NULL), m_unrd_size(0), m_unrd_cur(0), - m_cbk(NULL), m_cdata(NULL), - m_connected(FALSE), m_establishing(FALSE), - m_notify_state(FALSE), m_id(-1), - m_defering(NO_DEFER), m_error(FALSE), - m_states() +/* static */ +void wxSocketManager::Init() { + wxASSERT_MSG( !ms_manager, "shouldn't be initialized twice" ); + + /* + Details: Initialize() creates a hidden window as a sink for socket + events, such as 'read completed'. wxMSW has only one message loop + for the main thread. If Initialize is called in a secondary thread, + the socket window will be created for the secondary thread, but + since there is no message loop on this thread, it will never + receive events and all socket operations will time out. + BTW, the main thread must not be stopped using sleep or block + on a semaphore (a bad idea in any case) or socket operations + will time out. + + On the Mac side, Initialize() stores a pointer to the CFRunLoop for + the main thread. Because secondary threads do not have run loops, + adding event notifications to the "Current" loop would have no + effect at all, events would never fire. + */ + wxASSERT_MSG( wxIsMainThread(), + "sockets must be initialized from the main thread" ); + + wxAppConsole * const app = wxAppConsole::GetInstance(); + wxCHECK_RET( app, "sockets can't be initialized without wxApp" ); + + ms_manager = app->GetTraits()->GetSocketManager(); } -wxSocketBase::~wxSocketBase() +// ========================================================================== +// wxSocketImpl +// ========================================================================== + +wxSocketImpl::wxSocketImpl(wxSocketBase& wxsocket) + : m_wxsocket(&wxsocket) { - if (m_unread) - free(m_unread); + m_fd = INVALID_SOCKET; + m_error = wxSOCKET_NOERROR; + m_server = false; + m_stream = true; + + SetTimeout(wxsocket.GetTimeout() * 1000); + + m_establishing = false; + m_reusable = false; + m_broadcast = false; + m_dobind = true; + m_initialRecvBufferSize = -1; + m_initialSendBufferSize = -1; +} - // Shutdown and close the socket - Close(); +wxSocketImpl::~wxSocketImpl() +{ + if ( m_fd != INVALID_SOCKET ) + Shutdown(); +} + +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; + } - // Destroy the GSocket object - if (m_socket) - GSocket_destroy(m_socket); + return true; } -bool wxSocketBase::Close() +void wxSocketImpl::PostCreation() { - if (m_socket) - { - // Disable callbacks - GSocket_UnsetCallback(m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG | - GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG); + // FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option +#ifdef SO_NOSIGPIPE + EnableSocketOption(SO_NOSIGPIPE); +#endif + + if ( m_reusable ) + EnableSocketOption(SO_REUSEADDR); + + if ( m_broadcast ) + { + wxASSERT_MSG( !m_stream, "broadcasting is for datagram sockets only" ); + + EnableSocketOption(SO_BROADCAST); + } - // Shutdown the connection - GSocket_Shutdown(m_socket); - m_connected = FALSE; - m_establishing = FALSE; - } + if ( m_initialRecvBufferSize >= 0 ) + SetSocketOption(SO_RCVBUF, m_initialRecvBufferSize); + if ( m_initialSendBufferSize >= 0 ) + SetSocketOption(SO_SNDBUF, m_initialSendBufferSize); - return TRUE; + // we always put our sockets in unblocked mode and handle blocking + // ourselves in DoRead/Write() if wxSOCKET_WAITALL is specified + UnblockAndRegisterWithEventLoop(); } -// -------------------------------------------------------------- -// wxSocketBase basic IO operations -// -------------------------------------------------------------- +wxSocketError wxSocketImpl::UpdateLocalAddress() +{ + if ( !m_local.IsOk() ) + { + // ensure that we have a valid object using the correct family: correct + // being the same one as our peer uses as we have no other way to + // determine it + m_local.Create(m_peer.GetFamily()); + } -// GRG: I have made some changes to wxSocket internal event -// system; now, all events (INPUT, OUTPUT, CONNECTION, LOST) -// are always internally monitored; but users will only be -// notified of these events they are interested in. So we -// no longer have to change the event mask with SetNotify() -// in internal functions like DeferRead, DeferWrite, and -// the like. This solves a lot of problems. + WX_SOCKLEN_T lenAddr = m_local.GetLen(); + if ( getsockname(m_fd, m_local.GetWritableAddr(), &lenAddr) != 0 ) + { + Close(); + m_error = wxSOCKET_IOERR; + return m_error; + } -// GRG: I added m_error handling to IO operations. Now, -// wxSocketBase::Error() correctly indicates if the last -// operation from {Read, Write, ReadMsg, WriteMsg, Peek, -// Unread, Discard} failed. Note that now, every function -// that updates m_lcount, also updates m_error. While I -// was at it, also fixed an UGLY bug in ReadMsg. + return wxSOCKET_NOERROR; +} -class _wxSocketInternalTimer: public wxTimer +wxSocketError wxSocketImpl::CreateServer() { -public: - int *m_state; - unsigned long m_new_val; + if ( !PreCreateCheck(m_local) ) + return m_error; - void Notify() - { - *m_state = m_new_val; // Change the value - } -}; + m_server = true; + m_stream = true; -int wxSocketBase::DeferRead(char *buffer, wxUint32 nbytes) + // 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) { - // Timer for timeout - _wxSocketInternalTimer timer; + if ( !PreCreateCheck(m_peer) ) + return m_error; - wxASSERT(m_defering == NO_DEFER); + m_fd = socket(m_peer.GetFamily(), SOCK_STREAM, 0); - // Set the defering mode to READ. - m_defering = DEFER_READ; + 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; + } - // Set the current buffer. - m_defer_buffer = buffer; - m_defer_nbytes = nbytes; - m_defer_timer = &timer; + return m_error; +} - timer.m_state = (int *)&m_defer_buffer; - timer.m_new_val = 0; - timer.Start(m_timeout * 1000, FALSE); +wxSocketError wxSocketImpl::CreateUDP() +{ + if ( !PreCreateCheck(m_local) ) + return m_error; - // If the socket is readable, call DoDefer for the first time - if (GSocket_Select(m_socket, GSOCK_INPUT_FLAG)) - DoDefer(); + m_stream = false; + m_server = false; - // Wait for buffer completion. - while (m_defer_buffer != NULL) - wxYield(); + m_fd = socket(m_local.GetFamily(), SOCK_DGRAM, 0); - timer.Stop(); + if ( m_fd == INVALID_SOCKET ) + { + m_error = wxSOCKET_IOERR; + return wxSOCKET_IOERR; + } - // Disable defering mode. - m_defering = NO_DEFER; - m_defer_timer = NULL; + PostCreation(); - // Return the number of bytes read from the socket. - return nbytes-m_defer_nbytes; + 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; } -wxSocketBase& wxSocketBase::Read(char* buffer, wxUint32 nbytes) +wxSocketImpl *wxSocketImpl::Accept(wxSocketBase& wxsocket) { - int ret = 1; + wxSockAddressStorage from; + WX_SOCKLEN_T fromlen = sizeof(from); + const SOCKET fd = accept(m_fd, &from.addr, &fromlen); - m_error = FALSE; + // accepting is similar to reading in the sense that it resets "ready for + // read" flag on the socket + ReenableEvents(wxSOCKET_INPUT_FLAG); - // we try this even if the connection has already been closed. - m_lcount = GetPushback(buffer, nbytes, FALSE); - nbytes -= m_lcount; - buffer += m_lcount; + if ( fd == INVALID_SOCKET ) + return NULL; - if (!m_connected || !m_socket) - { - // if no data retrieved AND not connected, it is an error. - if (!m_lcount) - m_error = TRUE; + wxSocketManager * const manager = wxSocketManager::Get(); + if ( !manager ) + return NULL; - return *this; - } + wxSocketImpl * const sock = manager->CreateSocket(wxsocket); + if ( !sock ) + return NULL; - // If we have got the whole needed buffer, return immediately - if (!nbytes) - { - return *this; - } - - if (m_flags & SPEED & WAITALL) // SPEED && WAITALL - { - while (ret > 0 && nbytes > 0) - { - ret = GSocket_Read(m_socket, buffer, nbytes); - m_lcount += ret; - buffer += ret; - nbytes -= ret; - } - // In case the last call was an error ... - if (ret < 0) - m_lcount ++; - } - else if (m_flags & SPEED) // SPEED && !WAITALL - { - ret = GSocket_Read(m_socket, buffer, nbytes); - - if (ret > 0) - m_lcount += ret; - } - else // !SPEED - { - ret = DeferRead(buffer, nbytes); - - if (ret > 0) - m_lcount += ret; - } - - // If we have read some data, then it is not an error, even - // when in WAITALL mode, the last low-level IO call might - // have failed. - if (!m_lcount) - m_error = TRUE; - - return *this; -} - -wxSocketBase& wxSocketBase::ReadMsg(char* buffer, wxUint32 nbytes) -{ -#define MAX_BUFSIZE (10 * 1024) - - int old_flags; - unsigned long len, len2, sig; - struct - { - char sig[4]; - char len[4]; - } msg; - - // sig should be an explicit 32-bit unsigned integer; I've seen - // compilers in which wxUint32 was actually a 16-bit unsigned integer - - old_flags = m_flags; - SetFlags(WAITALL | SPEED); - - Read((char *)&msg, sizeof(msg)); - if (m_lcount != sizeof(msg)) - { - SetFlags(old_flags); - m_error = TRUE; - return *this; - } - - sig = msg.sig[0] & 0xff; - sig |= (wxUint32)(msg.sig[1] & 0xff) << 8; - sig |= (wxUint32)(msg.sig[2] & 0xff) << 16; - sig |= (wxUint32)(msg.sig[3] & 0xff) << 24; - - if (sig != 0xfeeddead) - { - wxLogDebug(_T("Warning: invalid signature returned to ReadMsg\n")); - SetFlags(old_flags); - m_error = TRUE; - return *this; - } - - len = msg.len[0] & 0xff; - len |= (wxUint32)(msg.len[1] & 0xff) << 8; - len |= (wxUint32)(msg.len[2] & 0xff) << 16; - len |= (wxUint32)(msg.len[3] & 0xff) << 24; - - if (len > nbytes) - { - len2 = len - nbytes; - len = nbytes; - } - else - len2 = 0; - - // The "len &&" in the following statements is necessary so - // that we don't attempt to read (and possibly hang the system) - // if the message was zero bytes long - if (len && Read(buffer, len).LastCount() != len) - { - SetFlags(old_flags); - m_error = TRUE; - return *this; - } - if (len2) - { - char *discard_buffer = new char[MAX_BUFSIZE]; - long discard_len; + sock->m_fd = fd; + sock->m_peer = wxSockAddressImpl(from.addr, fromlen); - do + sock->UnblockAndRegisterWithEventLoop(); + + return sock; +} + + +void wxSocketImpl::Close() +{ + if ( m_fd != INVALID_SOCKET ) { - discard_len = ((len2 > MAX_BUFSIZE)? MAX_BUFSIZE : len2); - discard_len = Read(discard_buffer, discard_len).LastCount(); - len2 -= discard_len; + DoClose(); + m_fd = INVALID_SOCKET; } - while ((discard_len > 0) && len2); - - delete [] discard_buffer; +} - if (len2 != 0) +void wxSocketImpl::Shutdown() +{ + if ( m_fd != INVALID_SOCKET ) { - SetFlags(old_flags); - m_error = TRUE; - return *this; + shutdown(m_fd, 1 /* SD_SEND */); + Close(); } - } - if (Read((char *)&msg, sizeof(msg)).LastCount() != sizeof(msg)) - { - SetFlags(old_flags); - m_error = TRUE; - return *this; - } +} - sig = msg.sig[0] & 0xff; - sig |= (wxUint32)(msg.sig[1] & 0xff) << 8; - sig |= (wxUint32)(msg.sig[2] & 0xff) << 16; - sig |= (wxUint32)(msg.sig[3] & 0xff) << 24; +/* + * Sets the timeout for blocking calls. Time is expressed in + * milliseconds. + */ +void wxSocketImpl::SetTimeout(unsigned long millis) +{ + SetTimeValFromMS(m_timeout, millis); +} - if (sig != 0xdeadfeed) - { - m_error = TRUE; - wxLogDebug(_T("Warning: invalid signature returned to ReadMsg\n")); - } +void wxSocketImpl::NotifyOnStateChange(wxSocketNotify event) +{ + m_wxsocket->OnRequest(event); +} - SetFlags(old_flags); - return *this; +/* Address handling */ +wxSocketError wxSocketImpl::SetLocal(const wxSockAddressImpl& local) +{ + /* the socket must be initialized, or it must be a server */ + if (m_fd != INVALID_SOCKET && !m_server) + { + m_error = wxSOCKET_INVSOCK; + return wxSOCKET_INVSOCK; + } + + if ( !local.IsOk() ) + { + m_error = wxSOCKET_INVADDR; + return wxSOCKET_INVADDR; + } -#undef MAX_BUFSIZE + m_local = local; + + return wxSOCKET_NOERROR; } -wxSocketBase& wxSocketBase::Peek(char* buffer, wxUint32 nbytes) +wxSocketError wxSocketImpl::SetPeer(const wxSockAddressImpl& peer) { - Read(buffer, nbytes); - CreatePushbackAfter(buffer, nbytes); + if ( !peer.IsOk() ) + { + m_error = wxSOCKET_INVADDR; + return wxSOCKET_INVADDR; + } - return *this; + m_peer = peer; + + return wxSOCKET_NOERROR; } -int wxSocketBase::DeferWrite(const char *buffer, wxUint32 nbytes) +const wxSockAddressImpl& wxSocketImpl::GetLocal() { - // Timer for timeout - _wxSocketInternalTimer timer; + if ( !m_local.IsOk() ) + UpdateLocalAddress(); - wxASSERT(m_defering == NO_DEFER); + return m_local; +} - m_defering = DEFER_WRITE; +// ---------------------------------------------------------------------------- +// wxSocketImpl IO +// ---------------------------------------------------------------------------- + +// this macro wraps the given expression (normally a syscall) in a loop which +// ignores any interruptions, i.e. reevaluates it again if it failed and errno +// is EINTR +#ifdef __UNIX__ + #define DO_WHILE_EINTR( rc, syscall ) \ + do { \ + rc = (syscall); \ + } \ + while ( rc == -1 && errno == EINTR ) +#else + #define DO_WHILE_EINTR( rc, syscall ) rc = (syscall) +#endif - // Set the current buffer - m_defer_buffer = (char *)buffer; - m_defer_nbytes = nbytes; - m_defer_timer = &timer; +int wxSocketImpl::RecvStream(void *buffer, int size) +{ + int ret; + DO_WHILE_EINTR( ret, recv(m_fd, static_cast(buffer), size, 0) ); - // Start timer - timer.m_state = (int *)&m_defer_buffer; - timer.m_new_val = 0; + if ( !ret ) + { + // receiving 0 bytes for a TCP socket indicates that the connection was + // closed by peer so shut down our end as well (for UDP sockets empty + // datagrams are also possible) + m_establishing = false; + NotifyOnStateChange(wxSOCKET_LOST); - timer.Start(m_timeout * 1000, FALSE); + Shutdown(); - // If the socket is writable, call DoDefer for the first time - if (GSocket_Select(m_socket, GSOCK_OUTPUT_FLAG)) - DoDefer(); + // do not return an error in this case however + } - // Wait for buffer completion. - while (m_defer_buffer != NULL) - wxYield(); + return ret; +} - // Stop timer - m_defer_timer = NULL; - timer.Stop(); +int wxSocketImpl::SendStream(const void *buffer, int size) +{ +#ifdef wxNEEDS_IGNORE_SIGPIPE + IgnoreSignal ignore(SIGPIPE); +#endif - m_defering = NO_DEFER; + int ret; + DO_WHILE_EINTR( ret, send(m_fd, static_cast(buffer), size, + wxSOCKET_MSG_NOSIGNAL) ); - return nbytes-m_defer_nbytes; + return ret; } -wxSocketBase& wxSocketBase::Write(const char *buffer, wxUint32 nbytes) +int wxSocketImpl::RecvDgram(void *buffer, int size) { - int ret = 1; + wxSockAddressStorage from; + WX_SOCKLEN_T fromlen = sizeof(from); - m_lcount = 0; - m_error = FALSE; + int ret; + DO_WHILE_EINTR( ret, recvfrom(m_fd, static_cast(buffer), size, + 0, &from.addr, &fromlen) ); - if (!m_connected || !m_socket) - { - m_error = TRUE; - return *this; - } - - if (m_flags & SPEED & WAITALL) // SPEED && WAITALL - { - while (ret > 0 && nbytes > 0) - { - ret = GSocket_Write(m_socket, buffer, nbytes); - m_lcount += ret; - buffer += ret; - nbytes -= ret; - } - // In case the last call was an error ... - if (ret < 0) - m_lcount ++; - } - else if (m_flags & SPEED) // SPEED && !WAITALL - { - ret = GSocket_Write(m_socket, buffer, nbytes); - - if (ret > 0) - m_lcount += ret; - } - else // !SPEED - { - ret = DeferWrite(buffer, nbytes); - - if (ret > 0) - m_lcount += ret; - } - - // If we have written some data, then it is not an error, - // even when in WAITALL mode, the last low-level IO call - // might have failed. - if (!m_lcount) - m_error = TRUE; - - return *this; -} - -wxSocketBase& wxSocketBase::WriteMsg(const char *buffer, wxUint32 nbytes) -{ - int old_flags; - struct { - char sig[4]; - char len[4]; - } msg; - - // warning about 'cast truncates constant value' -#ifdef __VISUALC__ - #pragma warning(disable: 4310) -#endif // __VISUALC__ - - msg.sig[0] = (char) 0xad; - msg.sig[1] = (char) 0xde; - msg.sig[2] = (char) 0xed; - msg.sig[3] = (char) 0xfe; - - msg.len[0] = (char) nbytes & 0xff; - msg.len[1] = (char) (nbytes >> 8) & 0xff; - msg.len[2] = (char) (nbytes >> 16) & 0xff; - msg.len[3] = (char) (nbytes >> 24) & 0xff; - - // GRG: We need WAITALL | SPEED - old_flags = m_flags; - SetFlags(WAITALL | SPEED); - - if (Write((char *)&msg, sizeof(msg)).LastCount() < sizeof(msg)) - { - SetFlags(old_flags); - m_error = TRUE; - return *this; - } - if (Write(buffer, nbytes).LastCount() < nbytes) - { - SetFlags(old_flags); - m_error = TRUE; - return *this; - } + if ( ret == SOCKET_ERROR ) + return SOCKET_ERROR; - msg.sig[0] = (char) 0xed; - msg.sig[1] = (char) 0xfe; - msg.sig[2] = (char) 0xad; - msg.sig[3] = (char) 0xde; - msg.len[0] = msg.len[1] = msg.len[2] = msg.len[3] = (char) 0; + m_peer = wxSockAddressImpl(from.addr, fromlen); + if ( !m_peer.IsOk() ) + return -1; - if (Write((char *)&msg, sizeof(msg)).LastCount() < sizeof(msg)) - m_error = TRUE; + return ret; +} - SetFlags(old_flags); - return *this; +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()) ); -#ifdef __VISUALC__ - #pragma warning(default: 4310) -#endif // __VISUALC__ + return ret; } -wxSocketBase& wxSocketBase::Unread(const char *buffer, wxUint32 nbytes) +int wxSocketImpl::Read(void *buffer, int size) { - m_error = FALSE; - m_lcount = 0; + // server sockets can't be used for IO, only to accept new connections + if ( m_fd == INVALID_SOCKET || m_server ) + { + m_error = wxSOCKET_INVSOCK; + return -1; + } - if (nbytes != 0) - { - CreatePushbackAfter(buffer, nbytes); - m_lcount = nbytes; - } - return *this; + int ret = m_stream ? RecvStream(buffer, size) + : RecvDgram(buffer, size); + + m_error = ret == SOCKET_ERROR ? GetLastError() : wxSOCKET_NOERROR; + + return ret; } -bool wxSocketBase::IsData() const +int wxSocketImpl::Write(const void *buffer, int size) { - if (!m_socket) - return FALSE; + if ( m_fd == INVALID_SOCKET || m_server ) + { + m_error = wxSOCKET_INVSOCK; + return -1; + } + + int ret = m_stream ? SendStream(buffer, size) + : SendDgram(buffer, size); - return (GSocket_Select(m_socket, GSOCK_INPUT_FLAG)); + m_error = ret == SOCKET_ERROR ? GetLastError() : wxSOCKET_NOERROR; + + return ret; } -// GRG: DoDefer() no longer needs to know which event occured, -// because this was only used to catch LOST events and set -// m_defer_buffer = NULL; this is done in OnRequest() now. +// ========================================================================== +// wxSocketBase +// ========================================================================== -void wxSocketBase::DoDefer() +// -------------------------------------------------------------------------- +// Initialization and shutdown +// -------------------------------------------------------------------------- + +namespace { - int ret; - if (!m_defer_buffer) - return; +// counts the number of calls to Initialize() minus the number of calls to +// Shutdown(): we don't really need it any more but it was documented that +// Shutdown() must be called the same number of times as Initialize() and using +// a counter helps us to check it +int gs_socketInitCount = 0; - switch (m_defering) - { - case DEFER_READ: - ret = GSocket_Read(m_socket, m_defer_buffer, m_defer_nbytes); - break; - case DEFER_WRITE: - ret = GSocket_Write(m_socket, m_defer_buffer, m_defer_nbytes); - break; - default: - ret = -1; - break; - } +} // anonymous namespace - if (ret >= 0) - m_defer_nbytes -= ret; +bool wxSocketBase::IsInitialized() +{ + wxASSERT_MSG( wxIsMainThread(), "unsafe to call from other threads" ); - // If we are waiting for all bytes to be acquired, keep the defering - // mode enabled. - if ((m_flags & WAITALL) == 0 || m_defer_nbytes == 0 || ret < 0) - { - m_defer_buffer = NULL; - } - else - { - m_defer_buffer += ret; - m_defer_timer->Start(m_timeout * 1000, FALSE); - } + return gs_socketInitCount != 0; } -void wxSocketBase::Discard() +bool wxSocketBase::Initialize() { -#define MAX_BUFSIZE (10*1024) + wxCHECK_MSG( wxIsMainThread(), false, + "must be called from the main thread" ); - char *my_data = new char[MAX_BUFSIZE]; - wxUint32 recv_size = MAX_BUFSIZE; - wxUint32 total = 0; + if ( !gs_socketInitCount ) + { + wxSocketManager * const manager = wxSocketManager::Get(); + if ( !manager || !manager->OnInit() ) + return false; + } - SaveState(); - SetFlags(NOWAIT); // GRG: SPEED was not needed here! + gs_socketInitCount++; + + return true; +} - while (recv_size == MAX_BUFSIZE) - { - recv_size = Read(my_data, MAX_BUFSIZE).LastCount(); - total += recv_size; - } +void wxSocketBase::Shutdown() +{ + wxCHECK_RET( wxIsMainThread(), "must be called from the main thread" ); - RestoreState(); - delete [] my_data; + wxCHECK_RET( gs_socketInitCount > 0, "too many calls to Shutdown()" ); - m_lcount = total; - m_error = FALSE; + if ( !--gs_socketInitCount ) + { + wxSocketManager * const manager = wxSocketManager::Get(); + wxCHECK_RET( manager, "should have a socket manager" ); -#undef MAX_BUFSIZE + manager->OnExit(); + } +} + +// -------------------------------------------------------------------------- +// Ctor and dtor +// -------------------------------------------------------------------------- + +void wxSocketBase::Init() +{ + m_impl = NULL; + m_type = wxSOCKET_UNINIT; + + // state + m_flags = 0; + m_connected = + m_establishing = + m_reading = + m_writing = + m_closed = false; + m_lcount = 0; + m_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 get local or peer addresses -// -------------------------------------------------------------- +wxSocketBase::wxSocketBase() +{ + Init(); +} -bool wxSocketBase::GetPeer(wxSockAddress& addr_man) const +wxSocketBase::wxSocketBase(wxSocketFlags flags, wxSocketType type) { - GAddress *peer; + Init(); + + SetFlags(flags); + + m_type = type; +} - if (!m_socket) - return FALSE; +wxSocketBase::~wxSocketBase() +{ + // Shutdown and close the socket + if (!m_beingDeleted) + Close(); - peer = GSocket_GetPeer(m_socket); - addr_man.SetAddress(peer); - GAddress_destroy(peer); + // Destroy the implementation object + delete m_impl; - return TRUE; + // Free the pushback buffer + free(m_unread); } -bool wxSocketBase::GetLocal(wxSockAddress& addr_man) const +bool wxSocketBase::Destroy() { - GAddress *local; + // Delayed destruction: the socket will be deleted during the next idle + // loop iteration. This ensures that all pending events have been + // processed. + m_beingDeleted = true; - if (!m_socket) - return FALSE; + // Shutdown and close the socket + Close(); - local = GSocket_GetLocal(m_socket); - addr_man.SetAddress(local); - GAddress_destroy(local); + // Suppress events from now on + Notify(false); - return TRUE; + // Schedule this object for deletion instead of destroying it right now if + // 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; } -// -------------------------------------------------------------- -// wxSocketBase save and restore socket state -// -------------------------------------------------------------- +// ---------------------------------------------------------------------------- +// simple accessors +// ---------------------------------------------------------------------------- -void wxSocketBase::SaveState() +void wxSocketBase::SetError(wxSocketError error) { - wxSocketState *state; + m_impl->m_error = error; +} + +wxSocketError wxSocketBase::LastError() const +{ + return m_impl->GetError(); +} - state = new wxSocketState(); +// -------------------------------------------------------------------------- +// Basic IO calls +// -------------------------------------------------------------------------- - state->notify_state = m_notify_state; - state->evt_notify_state = m_neededreq; - state->socket_flags = m_flags; - state->c_callback = m_cbk; - state->c_callback_data = m_cdata; +// The following IO operations update m_lcount: +// {Read, Write, ReadMsg, WriteMsg, Peek, Unread, Discard} +bool wxSocketBase::Close() +{ + // Interrupt pending waits + InterruptWait(); - m_states.Append(state); + ShutdownOutput(); + + m_connected = false; + m_establishing = false; + return true; } -void wxSocketBase::RestoreState() +void wxSocketBase::ShutdownOutput() { - wxNode *node; - wxSocketState *state; - - node = m_states.Last(); - if (!node) - return; + if ( m_impl ) + m_impl->Shutdown(); +} - state = (wxSocketState *)node->Data(); +wxSocketBase& wxSocketBase::Read(void* buffer, wxUint32 nbytes) +{ + wxSocketReadGuard read(this); - SetFlags(state->socket_flags); - m_neededreq = state->evt_notify_state; - m_cbk = state->c_callback; - m_cdata = state->c_callback_data; - Notify(state->notify_state); + m_lcount = DoRead(buffer, nbytes); - delete node; - delete state; + return *this; } +wxUint32 wxSocketBase::DoRead(void* buffer_, wxUint32 nbytes) +{ + wxCHECK_MSG( m_impl, 0, "socket must be valid" ); + + // We use pointer arithmetic here which doesn't work with void pointers. + char *buffer = static_cast(buffer_); + wxCHECK_MSG( buffer, 0, "NULL buffer" ); + + // 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; -// -------------------------------------------------------------- -// wxSocketBase Wait functions -// -------------------------------------------------------------- + while ( nbytes ) + { + // our socket is non-blocking so Read() will return immediately if + // there is nothing to read yet and it's more efficient to try it first + // before entering DoWait() which is going to start dispatching GUI + // events and, even more importantly, we must do this under Windows + // where we're not going to get notifications about socket being ready + // for reading before we read all the existing data from it + const int ret = !m_impl->m_stream || m_connected + ? m_impl->Read(buffer, nbytes) + : 0; + if ( ret == -1 ) + { + if ( m_impl->GetLastError() == wxSOCKET_WOULDBLOCK ) + { + // if we don't want to wait, just return immediately + if ( m_flags & wxSOCKET_NOWAIT ) + { + // this shouldn't be counted as an error in this case + SetError(wxSOCKET_NOERROR); + break; + } + + // otherwise wait until the socket becomes ready for reading or + // an error occurs on it + if ( !DoWaitWithTimeout(wxSOCKET_INPUT_FLAG) ) + { + // and exit if the timeout elapsed before it did + SetError(wxSOCKET_TIMEDOUT); + break; + } + + // retry reading + continue; + } + else // "real" error + { + SetError(wxSOCKET_IOERR); + break; + } + } + else if ( ret == 0 ) + { + // for connection-oriented (e.g. TCP) sockets we can only read + // 0 bytes if the other end has been closed, and for connectionless + // ones (UDP) this flag doesn't make sense anyhow so we can set it + // to true too without doing any harm + m_closed = true; + + // we're not going to read anything else and so if we haven't read + // anything (or not everything in wxSOCKET_WAITALL case) already, + // signal an error + if ( (m_flags & wxSOCKET_WAITALL) || !total ) + SetError(wxSOCKET_IOERR); + break; + } + + total += ret; + + // if we 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; + } -// GRG: I have completely rewritten this family of functions -// so that they don't depend on event notifications; instead, -// they poll the socket, using GSocket_Select(), to check for -// the specified combination of event flags, until an event -// occurs or until the timeout ellapses. The polling loop -// calls wxYield(), so this won't block the GUI. + return total; +} -bool wxSocketBase::_Wait(long seconds, long milliseconds, wxSocketEventFlags flags) +wxSocketBase& wxSocketBase::ReadMsg(void* buffer, wxUint32 nbytes) { - GSocketEventFlags result; - _wxSocketInternalTimer timer; - long timeout; - int state = -1; + struct + { + unsigned char sig[4]; + unsigned char len[4]; + } msg; + + wxSocketReadGuard read(this); + + wxSocketWaitModeChanger changeFlags(this, wxSOCKET_WAITALL); - // Check for valid socket - if ((!m_connected && !m_establishing) || !m_socket) - return FALSE; + bool ok = false; + if ( DoRead(&msg, sizeof(msg)) == sizeof(msg) ) + { + wxUint32 sig = (wxUint32)msg.sig[0]; + sig |= (wxUint32)(msg.sig[1] << 8); + sig |= (wxUint32)(msg.sig[2] << 16); + sig |= (wxUint32)(msg.sig[3] << 24); + + if ( sig == 0xfeeddead ) + { + wxUint32 len = (wxUint32)msg.len[0]; + len |= (wxUint32)(msg.len[1] << 8); + len |= (wxUint32)(msg.len[2] << 16); + len |= (wxUint32)(msg.len[3] << 24); + + wxUint32 len2; + if (len > nbytes) + { + len2 = len - nbytes; + len = nbytes; + } + else + len2 = 0; + + // Don't attempt to read if the msg was zero bytes long. + m_lcount = 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; + } + } + } - // Check for valid timeout value - if (seconds != -1) - timeout = seconds * 1000 + milliseconds; - else - timeout = m_timeout * 1000; + if ( !ok ) + SetError(wxSOCKET_IOERR); + + return *this; +} - // Activate timer - timer.m_state = &state; - timer.m_new_val = 0; - timer.Start(timeout, TRUE); +wxSocketBase& wxSocketBase::Peek(void* buffer, wxUint32 nbytes) +{ + wxSocketReadGuard read(this); - // Active polling (without using events) - result = GSocket_Select(m_socket, flags); + // Peek() should never block + wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT); - while ((result == 0) && (state == -1)) - { - wxYield(); - result = GSocket_Select(m_socket, flags); - } + m_lcount = DoRead(buffer, nbytes); - timer.Stop(); + Pushback(buffer, m_lcount); - return (result != 0); + return *this; } -bool wxSocketBase::Wait(long seconds, long milliseconds) +wxSocketBase& wxSocketBase::Write(const void *buffer, wxUint32 nbytes) { - return _Wait(seconds, milliseconds, GSOCK_INPUT_FLAG | - GSOCK_OUTPUT_FLAG | - GSOCK_CONNECTION_FLAG | - GSOCK_LOST_FLAG); + wxSocketWriteGuard write(this); + + m_lcount = DoWrite(buffer, nbytes); + + return *this; } -bool wxSocketBase::WaitForRead(long seconds, long milliseconds) +// 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) { - return _Wait(seconds, milliseconds, GSOCK_INPUT_FLAG | GSOCK_LOST_FLAG); + wxCHECK_MSG( m_impl, 0, "socket must be valid" ); + + const char *buffer = static_cast(buffer_); + wxCHECK_MSG( buffer, 0, "NULL buffer" ); + + wxUint32 total = 0; + while ( nbytes ) + { + if ( m_impl->m_stream && !m_connected ) + { + if ( (m_flags & wxSOCKET_WAITALL) || !total ) + SetError(wxSOCKET_IOERR); + break; + } + + const int ret = m_impl->Write(buffer, nbytes); + if ( ret == -1 ) + { + if ( m_impl->GetLastError() == wxSOCKET_WOULDBLOCK ) + { + if ( m_flags & wxSOCKET_NOWAIT ) + break; + + if ( !DoWaitWithTimeout(wxSOCKET_OUTPUT_FLAG) ) + { + SetError(wxSOCKET_TIMEDOUT); + break; + } + + continue; + } + else // "real" error + { + SetError(wxSOCKET_IOERR); + break; + } + } + + total += ret; + + if ( !(m_flags & wxSOCKET_WAITALL) ) + break; + + nbytes -= ret; + buffer += ret; + } + + return total; } -bool wxSocketBase::WaitForWrite(long seconds, long milliseconds) +wxSocketBase& wxSocketBase::WriteMsg(const void *buffer, wxUint32 nbytes) { - return _Wait(seconds, milliseconds, GSOCK_OUTPUT_FLAG | GSOCK_LOST_FLAG); + struct + { + unsigned char sig[4]; + unsigned char len[4]; + } msg; + + wxSocketWriteGuard write(this); + + wxSocketWaitModeChanger changeFlags(this, 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); + + 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; + } + } + + if ( !ok ) + SetError(wxSOCKET_IOERR); + + return *this; } -bool wxSocketBase::WaitForLost(long seconds, long milliseconds) +wxSocketBase& wxSocketBase::Unread(const void *buffer, wxUint32 nbytes) { - return _Wait(seconds, milliseconds, GSOCK_LOST_FLAG); + if (nbytes != 0) + Pushback(buffer, nbytes); + + SetError(wxSOCKET_NOERROR); + m_lcount = nbytes; + + return *this; } -void wxSocketBase::SetTimeout(long seconds) +wxSocketBase& wxSocketBase::Discard() { - m_timeout = seconds; + char *buffer = new char[MAX_DISCARD_SIZE]; + wxUint32 ret; + wxUint32 total = 0; + + wxSocketReadGuard read(this); + + wxSocketWaitModeChanger changeFlags(this, wxSOCKET_NOWAIT); + + do + { + ret = DoRead(buffer, MAX_DISCARD_SIZE); + total += ret; + } + while (ret == MAX_DISCARD_SIZE); + + delete[] buffer; + m_lcount = total; + SetError(wxSOCKET_NOERROR); - if (m_socket) - GSocket_SetTimeout(m_socket, m_timeout); + return *this; } -// -------------------------------------------------------------- -// wxSocketBase flags -// -------------------------------------------------------------- +// -------------------------------------------------------------------------- +// Wait functions +// -------------------------------------------------------------------------- -void wxSocketBase::SetFlags(wxSockFlags _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) { - m_flags = _flags; + if ( m_fd == INVALID_SOCKET ) + return (wxSOCKET_LOST_FLAG & flags); + + struct timeval tv; + if ( timeout ) + tv = *timeout; + else + tv.tv_sec = tv.tv_usec = 0; + + // prepare the FD sets, passing NULL for the one(s) we don't use + fd_set + readfds, *preadfds = NULL, + writefds, *pwritefds = NULL, + exceptfds; // always want to know about errors + + if ( flags & wxSOCKET_INPUT_FLAG ) + preadfds = &readfds; + + if ( flags & wxSOCKET_OUTPUT_FLAG ) + pwritefds = &writefds; + + // When using non-blocking connect() the client socket becomes connected + // (successfully or not) when it becomes writable but when using + // non-blocking accept() the server socket becomes connected when it + // becomes readable. + if ( flags & wxSOCKET_CONNECTION_FLAG ) + { + if ( m_server ) + preadfds = &readfds; + else + pwritefds = &writefds; + } + + if ( preadfds ) + { + wxFD_ZERO(preadfds); + wxFD_SET(m_fd, preadfds); + } + + if ( pwritefds ) + { + wxFD_ZERO(pwritefds); + wxFD_SET(m_fd, pwritefds); + } + + wxFD_ZERO(&exceptfds); + wxFD_SET(m_fd, &exceptfds); + + const int rc = select(m_fd + 1, preadfds, pwritefds, &exceptfds, &tv); + + // check for errors first + if ( rc == -1 || wxFD_ISSET(m_fd, &exceptfds) ) + { + m_establishing = false; + + return wxSOCKET_LOST_FLAG & flags; + } + + if ( rc == 0 ) + return 0; + + wxASSERT_MSG( rc == 1, "unexpected select() return value" ); + + wxSocketEventFlags detected = 0; + if ( preadfds && wxFD_ISSET(m_fd, preadfds) ) + detected |= wxSOCKET_INPUT_FLAG; + + if ( pwritefds && wxFD_ISSET(m_fd, pwritefds) ) + { + // check for the case of non-blocking connect() + if ( m_establishing && !m_server ) + { + int error; + SOCKOPTLEN_T len = sizeof(error); + m_establishing = false; + getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len); + + if ( error ) + detected = wxSOCKET_LOST_FLAG; + else + detected |= wxSOCKET_CONNECTION_FLAG; + } + else // not called to get non-blocking connect() status + { + detected |= wxSOCKET_OUTPUT_FLAG; + } + } + + return detected & flags; } -wxSocketBase::wxSockFlags wxSocketBase::GetFlags() const +int +wxSocketBase::DoWait(long seconds, long milliseconds, wxSocketEventFlags flags) { - return m_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); } -// -------------------------------------------------------------- -// wxSocketBase callback management -// -------------------------------------------------------------- +int +wxSocketBase::DoWait(long timeout, wxSocketEventFlags flags) +{ + wxCHECK_MSG( m_impl, -1, "can't wait on invalid socket" ); + + // we're never going to become ready in a TCP client if we're not connected + // any more (OTOH a server can call this to precisely wait for a connection + // so do wait for it in this case and UDP client is never "connected") + if ( !m_impl->IsServer() && + m_impl->m_stream && !m_connected && !m_establishing ) + return -1; + + // This can be set to true from Interrupt() to exit this function a.s.a.p. + m_interrupt = false; -wxSocketBase::wxSockCbk wxSocketBase::Callback(wxSockCbk cbk_) + + const wxMilliClock_t timeEnd = wxGetLocalTimeMillis() + timeout; + + // Get the active event loop which we'll use for the message dispatching + // when running in the main thread unless this was explicitly disabled by + // setting wxSOCKET_BLOCK flag + wxEventLoopBase *eventLoop; + if ( !(m_flags & wxSOCKET_BLOCK) && wxIsMainThread() ) + { + eventLoop = wxEventLoop::GetActive(); + } + else // in worker thread + { + // We never dispatch messages from threads other than the main one. + eventLoop = NULL; + } + + // Make sure the events we're interested in are enabled before waiting for + // them: this is really necessary here as otherwise this could happen: + // 1. DoRead(wxSOCKET_WAITALL) is called + // 2. There is nothing to read so DoWait(wxSOCKET_INPUT_FLAG) is called + // 3. Some, but not all data appears, wxSocketImplUnix::OnReadWaiting() + // is called and wxSOCKET_INPUT_FLAG events are disabled in it + // 4. Because of wxSOCKET_WAITALL we call DoWait() again but the events + // are still disabled and we block forever + // + // More elegant solution would be nice but for now simply re-enabling the + // events here will do + m_impl->ReenableEvents(flags & (wxSOCKET_INPUT_FLAG | wxSOCKET_OUTPUT_FLAG)); + + + // Wait until we receive the event we're waiting for or the timeout expires + // (but note that we always execute the loop at least once, even if timeout + // is 0 as this is used for polling) + int rc = 0; + for ( bool firstTime = true; !m_interrupt; firstTime = false ) + { + long timeLeft = wxMilliClockToLong(timeEnd - wxGetLocalTimeMillis()); + if ( timeLeft < 0 ) + { + if ( !firstTime ) + break; // timed out + + timeLeft = 0; + } + + wxSocketEventFlags events; + if ( eventLoop ) + { + // reset them before starting to wait + m_eventsgot = 0; + + eventLoop->DispatchTimeout(timeLeft); + + events = m_eventsgot; + } + else // no event loop or waiting in another thread + { + // as explained below, we should always check for wxSOCKET_LOST_FLAG + timeval tv; + SetTimeValFromMS(tv, timeLeft); + events = m_impl->Select(flags | wxSOCKET_LOST_FLAG, &tv); + } + + // always check for wxSOCKET_LOST_FLAG, even if flags doesn't include + // it, as continuing to wait for anything else after getting it is + // pointless + if ( events & wxSOCKET_LOST_FLAG ) + { + m_connected = false; + m_establishing = false; + rc = -1; + break; + } + + // otherwise mask out the bits we're not interested in + events &= flags; + + // Incoming connection (server) or connection established (client)? + if ( events & wxSOCKET_CONNECTION_FLAG ) + { + m_connected = true; + m_establishing = false; + rc = true; + break; + } + + // Data available or output buffer ready? + if ( (events & wxSOCKET_INPUT_FLAG) || (events & wxSOCKET_OUTPUT_FLAG) ) + { + rc = true; + break; + } + } + + return rc; +} + +bool wxSocketBase::Wait(long seconds, long milliseconds) { - wxSockCbk old_cbk = cbk_; + return DoWait(seconds, milliseconds, + wxSOCKET_INPUT_FLAG | + wxSOCKET_OUTPUT_FLAG | + wxSOCKET_CONNECTION_FLAG) != 0; +} - m_cbk = cbk_; - return old_cbk; +bool wxSocketBase::WaitForRead(long seconds, long milliseconds) +{ + // Check pushback buffer before entering DoWait + if ( m_unread ) + return true; + + // Check if the socket is not already ready for input, if it is, there is + // no need to start waiting for it (worse, we'll actually never get a + // notification about the socket becoming ready if it is already under + // Windows) + if ( m_impl->Select(wxSOCKET_INPUT_FLAG) ) + return true; + + return DoWait(seconds, milliseconds, wxSOCKET_INPUT_FLAG) != 0; } -char *wxSocketBase::CallbackData(char *data) + +bool wxSocketBase::WaitForWrite(long seconds, long milliseconds) { - char *old_data = m_cdata; + if ( m_impl->Select(wxSOCKET_OUTPUT_FLAG) ) + return true; - m_cdata = data; - return old_data; + return DoWait(seconds, milliseconds, wxSOCKET_OUTPUT_FLAG) != 0; } -// -------------------------------------------------------------- -// wxSocketBase automatic notifier -// -------------------------------------------------------------- +bool wxSocketBase::WaitForLost(long seconds, long milliseconds) +{ + return DoWait(seconds, milliseconds, wxSOCKET_LOST_FLAG) == -1; +} -static void wx_socket_callback(GSocket *socket, GSocketEvent event, char *cdata) +// -------------------------------------------------------------------------- +// Miscellaneous +// -------------------------------------------------------------------------- + +// +// Get local or peer address +// + +bool wxSocketBase::GetPeer(wxSockAddress& addr) const { - wxSocketBase *sckobj = (wxSocketBase *)cdata; + wxCHECK_MSG( m_impl, false, "invalid socket" ); + + const wxSockAddressImpl& peer = m_impl->GetPeer(); + if ( !peer.IsOk() ) + return false; + + addr.SetAddress(peer); - sckobj->OnRequest((wxSocketNotify)event); + return true; } -wxSocketEventFlags wxSocketBase::EventToNotify(wxSocketNotify evt) +bool wxSocketBase::GetLocal(wxSockAddress& addr) const { - switch (evt) - { - case GSOCK_INPUT: return GSOCK_INPUT_FLAG; - case GSOCK_OUTPUT: return GSOCK_OUTPUT_FLAG; - case GSOCK_CONNECTION: return GSOCK_CONNECTION_FLAG; - case GSOCK_LOST: return GSOCK_LOST_FLAG; - } - return 0; + wxCHECK_MSG( m_impl, false, "invalid socket" ); + + const wxSockAddressImpl& local = m_impl->GetLocal(); + if ( !local.IsOk() ) + return false; + + addr.SetAddress(local); + + return true; } -void wxSocketBase::SetNotify(wxSocketEventFlags flags) +// +// Save and restore socket state +// + +void wxSocketBase::SaveState() { - m_neededreq = flags; + wxSocketState *state; + + state = new wxSocketState(); + + state->m_flags = m_flags; + state->m_notify = m_notify; + state->m_eventmask = m_eventmask; + state->m_clientData = m_clientData; + + m_states.Append(state); } -void wxSocketBase::Notify(bool notify) +void wxSocketBase::RestoreState() { - m_notify_state = notify; -} - -void wxSocketBase::OnRequest(wxSocketNotify req_evt) -{ - wxSocketEvent event(m_id); - wxSocketEventFlags flag = EventToNotify(req_evt); - - switch(req_evt) - { - case wxSOCKET_CONNECTION: - m_establishing = FALSE; - m_connected = TRUE; - break; - case wxSOCKET_LOST: - m_defer_buffer = NULL; - Close(); - break; - case wxSOCKET_INPUT: - case wxSOCKET_OUTPUT: - if (m_defer_buffer) - { - // GRG: DoDefer() no longer needs to know which - // event occured, because this was only used to - // catch LOST events and set m_defer_buffer to - // NULL, and this is done in OnRequest() now. - DoDefer(); - // Do not notify to user + wxList::compatibility_iterator node; + wxSocketState *state; + + node = m_states.GetLast(); + if (!node) return; - } - break; - } - if (((m_neededreq & flag) == flag) && m_notify_state) - { - event.m_socket = this; - event.m_skevt = req_evt; - ProcessEvent(event); - OldOnNotify(req_evt); + state = (wxSocketState *)node->GetData(); + + m_flags = state->m_flags; + m_notify = state->m_notify; + m_eventmask = state->m_eventmask; + m_clientData = state->m_clientData; - if (m_cbk) - m_cbk(*this, req_evt, m_cdata); - } + m_states.Erase(node); + delete state; } -void wxSocketBase::OldOnNotify(wxSocketNotify evt) +// +// Timeout and flags +// + +void wxSocketBase::SetTimeout(long seconds) { -} + m_timeout = seconds; -// -------------------------------------------------------------- -// wxSocketBase set event handler -// -------------------------------------------------------------- + if (m_impl) + m_impl->SetTimeout(m_timeout * 1000); +} -void wxSocketBase::SetEventHandler(wxEvtHandler& h_evt, int id) +void wxSocketBase::SetFlags(wxSocketFlags flags) { - SetNextHandler(&h_evt); - m_id = id; + // Do some sanity checking on the flags used: not all values can be used + // together. + wxASSERT_MSG( !(flags & wxSOCKET_NOWAIT) || + !(flags & (wxSOCKET_WAITALL | wxSOCKET_BLOCK)), + "Using wxSOCKET_WAITALL or wxSOCKET_BLOCK with " + "wxSOCKET_NOWAIT doesn't make sense" ); + + m_flags = flags; } -// -------------------------------------------------------------- -// wxSocketBase pushback library -// -------------------------------------------------------------- -void wxSocketBase::CreatePushbackAfter(const char *buffer, wxUint32 size) +// -------------------------------------------------------------------------- +// Event handling +// -------------------------------------------------------------------------- + +void wxSocketBase::OnRequest(wxSocketNotify notification) { - char *curr_pos; + wxSocketEventFlags flag = 0; + switch ( notification ) + { + case wxSOCKET_INPUT: + flag = wxSOCKET_INPUT_FLAG; + break; + + case wxSOCKET_OUTPUT: + flag = wxSOCKET_OUTPUT_FLAG; + break; + + case wxSOCKET_CONNECTION: + flag = wxSOCKET_CONNECTION_FLAG; + + // 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 (m_unread != NULL) - m_unread = (char *) realloc(m_unread, m_unrd_size+size); - else - m_unread = (char *) malloc(size); + // if we lost the connection the socket is now closed and not + // connected any more + m_connected = false; + m_closed = true; + break; - curr_pos = m_unread + m_unrd_size; + default: + wxFAIL_MSG( "unknown wxSocket notification" ); + } + + // remember the events which were generated for this socket, we're going to + // use this in DoWait() + m_eventsgot |= flag; - memcpy(curr_pos, buffer, size); - m_unrd_size += size; + // send the wx event if enabled and we're interested in it + if ( m_notify && (m_eventmask & flag) && m_handler ) + { + // don't generate the events when we're inside DoWait() called from our + // own code as we are going to consume the data that has just become + // available ourselves and the user code won't see it at all + if ( (notification == wxSOCKET_INPUT && m_reading) || + (notification == wxSOCKET_OUTPUT && m_writing) ) + { + return; + } + + wxSocketEvent event(m_id); + event.m_event = notification; + event.m_clientData = m_clientData; + event.SetEventObject(this); + + m_handler->AddPendingEvent(event); + } } -void wxSocketBase::CreatePushbackBefore(const char *buffer, wxUint32 size) +void wxSocketBase::Notify(bool notify) { - if (m_unread == NULL) - m_unread = (char *)malloc(size); - else { - char *tmp; + m_notify = notify; +} - tmp = (char *)malloc(m_unrd_size + size); - memcpy(tmp+size, m_unread, m_unrd_size); - free(m_unread); +void wxSocketBase::SetNotify(wxSocketEventFlags flags) +{ + m_eventmask = flags; +} + +void wxSocketBase::SetEventHandler(wxEvtHandler& handler, int id) +{ + m_handler = &handler; + m_id = id; +} - m_unread = tmp; - } +// -------------------------------------------------------------------------- +// Pushback buffer +// -------------------------------------------------------------------------- - m_unrd_size += size; +void wxSocketBase::Pushback(const void *buffer, wxUint32 size) +{ + if (!size) return; - memcpy(m_unread, buffer, size); + 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); + + m_unread = tmp; + } + + m_unrd_size += size; + + memcpy(m_unread, buffer, size); } -wxUint32 wxSocketBase::GetPushback(char *buffer, wxUint32 size, bool peek) +wxUint32 wxSocketBase::GetPushback(void *buffer, wxUint32 size, bool peek) { - if (!m_unrd_size) - return 0; + wxCHECK_MSG( buffer, 0, "NULL buffer" ); + + if (!m_unrd_size) + return 0; - if (size > (m_unrd_size-m_unrd_cur)) - size = m_unrd_size-m_unrd_cur; - memcpy(buffer, (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) { - free(m_unread); - m_unread = NULL; - m_unrd_size = 0; - m_unrd_cur = 0; + memcpy(buffer, (char *)m_unread + m_unrd_cur, size); + + if (!peek) + { + m_unrd_cur += size; + if (m_unrd_size == m_unrd_cur) + { + free(m_unread); + m_unread = NULL; + m_unrd_size = 0; + m_unrd_cur = 0; + } } - } - return size; + return size; } -// -------------------------------------------------------------- + +// ========================================================================== // wxSocketServer -// -------------------------------------------------------------- +// ========================================================================== -// -------------------------------------------------------------- -// wxSocketServer ctor and dtor -// -------------------------------------------------------------- +// -------------------------------------------------------------------------- +// Ctor +// -------------------------------------------------------------------------- -wxSocketServer::wxSocketServer(wxSockAddress& addr_man, - wxSockFlags flags) : - wxSocketBase(flags, SOCK_SERVER) +wxSocketServer::wxSocketServer(const wxSockAddress& addr, + wxSocketFlags flags) + : wxSocketBase(flags, wxSOCKET_SERVER) { - // Create the socket - m_socket = GSocket_new(); + wxLogTrace( wxTRACE_Socket, wxT("Opening wxSocketServer") ); - if (!m_socket) - return; + wxSocketManager * const manager = wxSocketManager::Get(); + m_impl = manager ? manager->CreateSocket(*this) : NULL; - // Setup the socket as server - GSocket_SetLocal(m_socket, addr_man.GetAddress()); - if (GSocket_SetServer(m_socket) != GSOCK_NOERROR) - { - GSocket_destroy(m_socket); - m_socket = NULL; - return; - } + if (!m_impl) + { + wxLogTrace( wxTRACE_Socket, wxT("*** Failed to create m_impl") ); + return; + } + + // Setup the socket as server + m_impl->SetLocal(addr.GetAddress()); + + if (GetFlags() & wxSOCKET_REUSEADDR) { + m_impl->SetReusable(); + } + if (GetFlags() & wxSOCKET_BROADCAST) { + m_impl->SetBroadcast(); + } + if (GetFlags() & wxSOCKET_NOBIND) { + m_impl->DontDoBind(); + } + + if (m_impl->CreateServer() != wxSOCKET_NOERROR) + { + wxDELETE(m_impl); - GSocket_SetTimeout(m_socket, m_timeout); - GSocket_SetCallback(m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG | - GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG, - wx_socket_callback, (char *)this); + wxLogTrace( wxTRACE_Socket, wxT("*** CreateServer() failed") ); + return; + } + wxLogTrace( wxTRACE_Socket, wxT("wxSocketServer on fd %d"), m_impl->m_fd ); } -// -------------------------------------------------------------- -// wxSocketServer Accept -// -------------------------------------------------------------- +// -------------------------------------------------------------------------- +// Accept +// -------------------------------------------------------------------------- bool wxSocketServer::AcceptWith(wxSocketBase& sock, bool wait) { - GSocket *child_socket; + if ( !m_impl || (m_impl->m_fd == INVALID_SOCKET) || !m_impl->IsServer() ) + { + wxFAIL_MSG( "can only be called for a valid server socket" ); - if (!m_socket) - return FALSE; + SetError(wxSOCKET_INVSOCK); - // GRG: If wait == FALSE, then the call should be nonblocking. - // When we are finished, we put the socket to blocking mode - // again. + return false; + } - if (!wait) - GSocket_SetNonBlocking(m_socket, TRUE); + if ( wait ) + { + // wait until we get a connection + if ( !m_impl->SelectWithTimeout(wxSOCKET_INPUT_FLAG) ) + { + SetError(wxSOCKET_TIMEDOUT); - child_socket = GSocket_WaitConnection(m_socket); + return false; + } + } - if (!wait) - GSocket_SetNonBlocking(m_socket, FALSE); + sock.m_impl = m_impl->Accept(sock); - // GRG: this was not being handled! - if (child_socket == NULL) - return FALSE; + if ( !sock.m_impl ) + { + SetError(m_impl->GetLastError()); - sock.m_type = SOCK_INTERNAL; - sock.m_socket = child_socket; - sock.m_connected = TRUE; + return false; + } - GSocket_SetTimeout(sock.m_socket, sock.m_timeout); - GSocket_SetCallback(sock.m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG | - GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG, - wx_socket_callback, (char *)&sock); + sock.m_type = wxSOCKET_BASE; + sock.m_connected = true; - return TRUE; + return true; } wxSocketBase *wxSocketServer::Accept(bool wait) { - wxSocketBase* sock = new wxSocketBase(); + wxSocketBase* sock = new wxSocketBase(); - sock->SetFlags((wxSockFlags)m_flags); + sock->SetFlags(m_flags); - if (!AcceptWith(*sock, wait)) - return NULL; + if (!AcceptWith(*sock, wait)) + { + sock->Destroy(); + sock = NULL; + } - return sock; + return sock; } bool wxSocketServer::WaitForAccept(long seconds, long milliseconds) { - return _Wait(seconds, milliseconds, GSOCK_CONNECTION_FLAG | GSOCK_LOST_FLAG); + return DoWait(seconds, milliseconds, wxSOCKET_CONNECTION_FLAG) == 1; } -// -------------------------------------------------------------- -// wxSocketClient -// -------------------------------------------------------------- +bool wxSocketBase::GetOption(int level, int optname, void *optval, int *optlen) +{ + 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; -// -------------------------------------------------------------- -// wxSocketClient ctor and dtor -// -------------------------------------------------------------- + *optlen = lenreal; -wxSocketClient::wxSocketClient(wxSockFlags _flags) : - wxSocketBase(_flags, SOCK_CLIENT) + return true; +} + +bool +wxSocketBase::SetOption(int level, int optname, const void *optval, int optlen) { + wxASSERT_MSG( m_impl, wxT("Socket not initialised") ); + + return setsockopt(m_impl->m_fd, level, optname, + static_cast(optval), optlen) == 0; } -wxSocketClient::~wxSocketClient() +bool wxSocketBase::SetLocal(const wxIPV4address& local) { + m_localAddress = local; + + return true; } -// -------------------------------------------------------------- -// wxSocketClient Connect functions -// -------------------------------------------------------------- -bool wxSocketClient::Connect(wxSockAddress& addr_man, bool wait) +// ========================================================================== +// wxSocketClient +// ========================================================================== + +// -------------------------------------------------------------------------- +// Ctor and dtor +// -------------------------------------------------------------------------- + +wxSocketClient::wxSocketClient(wxSocketFlags flags) + : wxSocketBase(flags, wxSOCKET_CLIENT) { - GSocketError err; + m_initialRecvBufferSize = + m_initialSendBufferSize = -1; +} - if (IsConnected()) - Close(); +// -------------------------------------------------------------------------- +// Connect +// -------------------------------------------------------------------------- + +bool wxSocketClient::DoConnect(const wxSockAddress& remote, + const wxSockAddress* local, + bool wait) +{ + if ( m_impl ) + { + // Shutdown and destroy the old socket + Close(); + delete m_impl; + } - // This should never happen. - if (m_socket) - GSocket_destroy(m_socket); + m_connected = false; + m_establishing = false; - // Initialize all socket stuff ... - 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(); - GSocket_SetTimeout(m_socket, m_timeout); + // 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; - // GRG: 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) - GSocket_SetNonBlocking(m_socket, TRUE); + m_impl->SetInitialSocketBuffers(m_initialRecvBufferSize, m_initialSendBufferSize); - GSocket_SetPeer(m_socket, addr_man.GetAddress()); - err = GSocket_Connect(m_socket, GSOCK_STREAMED); - GSocket_SetCallback(m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG | - GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG, - wx_socket_callback, (char *)this); + m_impl->SetPeer(remote.GetAddress()); - if (!wait) - GSocket_SetNonBlocking(m_socket, FALSE); + // Finally do create the socket and connect to the peer + const wxSocketError err = m_impl->CreateClient(wait); + + if ( err != wxSOCKET_NOERROR ) + { + if ( err == wxSOCKET_WOULDBLOCK ) + { + wxASSERT_MSG( !wait, "shouldn't get this for blocking connect" ); - if (err != GSOCK_NOERROR) - { - if (err == GSOCK_WOULDBLOCK) - m_establishing = TRUE; + m_establishing = true; + } - return FALSE; - } + return false; + } - m_connected = TRUE; - return TRUE; + m_connected = true; + return true; } -bool wxSocketClient::WaitOnConnect(long seconds, long milliseconds) +bool wxSocketClient::Connect(const wxSockAddress& remote, bool wait) { - bool ret; + return DoConnect(remote, NULL, wait); +} - if (m_connected) // Already connected - return TRUE; +bool wxSocketClient::Connect(const wxSockAddress& remote, + const wxSockAddress& local, + bool wait) +{ + return DoConnect(remote, &local, wait); +} - if (!m_establishing || !m_socket) // No connection in progress - return FALSE; +bool wxSocketClient::WaitOnConnect(long seconds, long milliseconds) +{ + if ( m_connected ) + { + // this happens if the initial attempt to connect succeeded without + // blocking + return true; + } - ret = _Wait(seconds, milliseconds, GSOCK_CONNECTION_FLAG | GSOCK_LOST_FLAG); + wxCHECK_MSG( m_establishing && m_impl, false, + "No connection establishment attempt in progress" ); - // GRG: m_connected and m_establishing will be updated in - // OnRequest(), but we do it here anyway because sometimes - // the event might be a bit delayed, and if that happens, - // when WaitOnConnect() returns, m_connected will still be - // FALSE. We have to do it as well in OnRequest because - // maybe WaitOnConnect() is not being used... + // 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; +} - if (ret) - { - m_connected = GSocket_Select(m_socket, GSOCK_CONNECTION_FLAG); - m_establishing = FALSE; - } +// ========================================================================== +// wxDatagramSocket +// ========================================================================== - return m_connected; -} +wxDatagramSocket::wxDatagramSocket( const wxSockAddress& addr, + wxSocketFlags flags ) + : wxSocketBase( flags, wxSOCKET_DATAGRAM ) +{ + // Create the socket + wxSocketManager * const manager = wxSocketManager::Get(); + m_impl = manager ? manager->CreateSocket(*this) : NULL; + if (!m_impl) + return; -// -------------------------------------------------------------- -// wxSocketEvent -// -------------------------------------------------------------- + // 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(); + } -wxSocketEvent::wxSocketEvent(int id) - : wxEvent(id) -{ - wxEventType type = (wxEventType)wxEVT_SOCKET; + if ( m_impl->CreateUDP() != wxSOCKET_NOERROR ) + { + wxDELETE(m_impl); + return; + } - SetEventType(type); + // Initialize all stuff + m_connected = false; + m_establishing = false; } -void wxSocketEvent::CopyObject(wxObject& obj_d) const +wxDatagramSocket& wxDatagramSocket::RecvFrom( wxSockAddress& addr, + void* buf, + wxUint32 nBytes ) { - wxSocketEvent *event = (wxSocketEvent *)&obj_d; + Read(buf, nBytes); + GetPeer(addr); + return (*this); +} - wxEvent::CopyObject(obj_d); +wxDatagramSocket& wxDatagramSocket::SendTo( const wxSockAddress& addr, + const void* buf, + wxUint32 nBytes ) +{ + wxASSERT_MSG( m_impl, wxT("Socket not initialised") ); - event->m_skevt = m_skevt; - event->m_socket = m_socket; + m_impl->SetPeer(addr.GetAddress()); + Write(buf, nBytes); + return (*this); } -// -------------------------------------------------------------------------- +// ========================================================================== // wxSocketModule -// -------------------------------------------------------------------------- -class WXDLLEXPORT wxSocketModule: public wxModule { - DECLARE_DYNAMIC_CLASS(wxSocketModule) - public: - bool OnInit() { - return GSocket_Init(); - } - void OnExit() { - GSocket_Cleanup(); - } +// ========================================================================== + +class wxSocketModule : public wxModule +{ +public: + virtual bool OnInit() + { + // wxSocketBase will call Initialize() itself only if sockets are + // really used, don't do it from here + return true; + } + + virtual void OnExit() + { + if ( wxSocketBase::IsInitialized() ) + wxSocketBase::Shutdown(); + } + +private: + DECLARE_DYNAMIC_CLASS(wxSocketModule) }; IMPLEMENT_DYNAMIC_CLASS(wxSocketModule, wxModule) +#if defined(wxUSE_SELECT_DISPATCHER) && wxUSE_SELECT_DISPATCHER +// NOTE: we need to force linking against socketiohandler.cpp otherwise in +// static builds of wxWidgets the ManagerSetter::ManagerSetter ctor +// contained there wouldn't be ever called +wxFORCE_LINK_MODULE( socketiohandler ) +#endif + +// same for ManagerSetter in the MSW file +#ifdef __WXMSW__ + wxFORCE_LINK_MODULE( mswsocket ) #endif - // wxUSE_SOCKETS + +// and for OSXManagerSetter in the OS X one +#ifdef __WXOSX__ + wxFORCE_LINK_MODULE( osxsocket ) +#endif + +#endif // wxUSE_SOCKETS