X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/6e31e940637b08f56e23321b4b6df8e52fe31ca3..77c8efc8c37da6d6a5e2e8022d21d1cd7d76371d:/src/common/sckipc.cpp?ds=sidebyside diff --git a/src/common/sckipc.cpp b/src/common/sckipc.cpp index 5652d901cc..0b5b834536 100644 --- a/src/common/sckipc.cpp +++ b/src/common/sckipc.cpp @@ -1,523 +1,932 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: sckipc.cpp +// Name: src/common/sckipc.cpp // Purpose: Interprocess communication implementation (wxSocket version) -// Author: Julian Smart, Guilhem Lavaux +// Author: Julian Smart // Modified by: Guilhem Lavaux (big rewrite) May 1997, 1998 +// Guillermo Rodriguez (updated for wxSocket v2) Jan 2000 +// (callbacks deprecated) Mar 2000 +// Vadim Zeitlin (added support for Unix sockets) Apr 2002 +// (use buffering, many fixes/cleanup) Oct 2008 // Created: 1993 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart 1993, Guilhem Lavaux 1997, 1998 -// Licence: wxWindows license +// Copyright: (c) Julian Smart 1993 +// (c) Guilhem Lavaux 1997, 1998 +// (c) 2000 Guillermo Rodriguez +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "sckipc.h" -#endif +// ========================================================================== +// declarations +// ========================================================================== + +// -------------------------------------------------------------------------- +// headers +// -------------------------------------------------------------------------- // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif -#if wxUSE_SOCKETS +#if wxUSE_SOCKETS && wxUSE_IPC && wxUSE_STREAMS + +#include "wx/sckipc.h" #ifndef WX_PRECOMP + #include "wx/log.h" + #include "wx/event.h" + #include "wx/module.h" #endif #include #include +#include #include "wx/socket.h" -#include "wx/sckipc.h" -#ifdef __BORLANDC__ -#pragma hdrstop +// -------------------------------------------------------------------------- +// macros and constants +// -------------------------------------------------------------------------- + +namespace +{ + +// Message codes (don't change them to avoid breaking the existing code using +// wxIPC protocol!) +enum IPCCode +{ + IPC_EXECUTE = 1, + IPC_REQUEST = 2, + IPC_POKE = 3, + IPC_ADVISE_START = 4, + IPC_ADVISE_REQUEST = 5, + IPC_ADVISE = 6, + IPC_ADVISE_STOP = 7, + IPC_REQUEST_REPLY = 8, + IPC_FAIL = 9, + IPC_CONNECT = 10, + IPC_DISCONNECT = 11, + IPC_MAX +}; + +} // anonymous namespace + +// headers needed for umask() +#ifdef __UNIX_LIKE__ + #include + #include +#endif // __UNIX_LIKE__ + +// ---------------------------------------------------------------------------- +// private functions +// ---------------------------------------------------------------------------- + +// get the address object for the given server name, the caller must delete it +static wxSockAddress * +GetAddressFromName(const wxString& serverName, + const wxString& host = wxEmptyString) +{ + // we always use INET sockets under non-Unix systems +#if defined(__UNIX__) && !defined(__WINDOWS__) && !defined(__WINE__) + // under Unix, if the server name looks like a path, create a AF_UNIX + // socket instead of AF_INET one + if ( serverName.Find(wxT('/')) != wxNOT_FOUND ) + { + wxUNIXaddress *addr = new wxUNIXaddress; + addr->Filename(serverName); + + return addr; + } +#endif // Unix/!Unix + { + wxIPV4address *addr = new wxIPV4address; + addr->Service(serverName); + if ( !host.empty() ) + { + addr->Hostname(host); + } + + return addr; + } +} + +// -------------------------------------------------------------------------- +// wxTCPEventHandler stuff (private class) +// -------------------------------------------------------------------------- + +class wxTCPEventHandler : public wxEvtHandler +{ +public: + wxTCPEventHandler() : wxEvtHandler() { } + + void Client_OnRequest(wxSocketEvent& event); + void Server_OnRequest(wxSocketEvent& event); + +private: + void HandleDisconnect(wxTCPConnection *connection); + + DECLARE_EVENT_TABLE() + wxDECLARE_NO_COPY_CLASS(wxTCPEventHandler); +}; + +enum +{ + _CLIENT_ONREQUEST_ID = 1000, + _SERVER_ONREQUEST_ID +}; + +// -------------------------------------------------------------------------- +// wxTCPEventHandlerModule (private class) +// -------------------------------------------------------------------------- + +class wxTCPEventHandlerModule : public wxModule +{ +public: + wxTCPEventHandlerModule() : wxModule() { } + + // get the global wxTCPEventHandler creating it if necessary + static wxTCPEventHandler& GetHandler() + { + if ( !ms_handler ) + ms_handler = new wxTCPEventHandler; + + return *ms_handler; + } + + // as ms_handler is initialized on demand, don't do anything in OnInit() + virtual bool OnInit() { return true; } + virtual void OnExit() { wxDELETE(ms_handler); } + +private: + static wxTCPEventHandler *ms_handler; + + DECLARE_DYNAMIC_CLASS(wxTCPEventHandlerModule) + wxDECLARE_NO_COPY_CLASS(wxTCPEventHandlerModule); +}; + +IMPLEMENT_DYNAMIC_CLASS(wxTCPEventHandlerModule, wxModule) + +wxTCPEventHandler *wxTCPEventHandlerModule::ms_handler = NULL; + +// -------------------------------------------------------------------------- +// wxIPCSocketStreams +// -------------------------------------------------------------------------- + +#define USE_BUFFER + +// this class contains the various (related) streams used by wxTCPConnection +// and also provides a way to read from the socket stream directly +// +// for writing to the stream use the IPCOutput class below +class wxIPCSocketStreams +{ +public: + // ctor initializes all the streams on top of the given socket + // + // note that we use a bigger than default buffer size which matches the + // typical Ethernet MTU (minus TCP header overhead) + wxIPCSocketStreams(wxSocketBase& sock) + : m_socketStream(sock), +#ifdef USE_BUFFER + m_bufferedOut(m_socketStream, 1448), +#else + m_bufferedOut(m_socketStream), #endif + m_dataIn(m_socketStream), + m_dataOut(m_bufferedOut) + { + } -#if !USE_SHARED_LIBRARY -IMPLEMENT_DYNAMIC_CLASS(wxTCPServer, wxServerBase) -IMPLEMENT_DYNAMIC_CLASS(wxTCPClient, wxClientBase) -IMPLEMENT_DYNAMIC_CLASS(wxTCPConnection, wxConnectionBase) + // expose the IO methods needed by IPC code (notice that writing is only + // done via IPCOutput) + + // flush output + void Flush() + { +#ifdef USE_BUFFER + m_bufferedOut.Sync(); #endif + } -// It seems to be already defined somewhere in the Xt includes. -#ifndef __XT__ -// Message codes -enum { - IPC_EXECUTE = 1, - IPC_REQUEST, - IPC_POKE, - IPC_ADVISE_START, - IPC_ADVISE_REQUEST, - IPC_ADVISE, - IPC_ADVISE_STOP, - IPC_REQUEST_REPLY, - IPC_FAIL, - IPC_CONNECT, - IPC_DISCONNECT -}; + // simple wrappers around the functions with the same name in + // wxDataInputStream + wxUint8 Read8() + { + Flush(); + return m_dataIn.Read8(); + } + + wxUint32 Read32() + { + Flush(); + return m_dataIn.Read32(); + } + + wxString ReadString() + { + Flush(); + return m_dataIn.ReadString(); + } + + // read arbitrary (size-prepended) data + // + // connection parameter is needed to call its GetBufferAtLeast() method + void *ReadData(wxConnectionBase *conn, size_t *size) + { + Flush(); + + wxCHECK_MSG( conn, NULL, "NULL connection parameter" ); + wxCHECK_MSG( size, NULL, "NULL size parameter" ); + + *size = Read32(); + + void * const data = conn->GetBufferAtLeast(*size); + wxCHECK_MSG( data, NULL, "IPC buffer allocation failed" ); + + m_socketStream.Read(data, *size); + + return data; + } + + // same as above but for data preceded by the format + void * + ReadFormatData(wxConnectionBase *conn, wxIPCFormat *format, size_t *size) + { + wxCHECK_MSG( format, NULL, "NULL format parameter" ); + + *format = static_cast(Read8()); + + return ReadData(conn, size); + } + + + // these methods are only used by IPCOutput and not directly + wxDataOutputStream& GetDataOut() { return m_dataOut; } + wxOutputStream& GetUnformattedOut() { return m_bufferedOut; } + +private: + // this is the low-level underlying stream using the connection socket + wxSocketStream m_socketStream; + + // the buffered stream is used to avoid writing all pieces of an IPC + // request to the socket one by one but to instead do it all at once when + // we're done with it +#ifdef USE_BUFFER + wxBufferedOutputStream m_bufferedOut; +#else + wxOutputStream& m_bufferedOut; #endif -void Server_OnRequest(wxSocketServer& server, - wxSocketNotify evt, - char *cdata); -void Client_OnRequest(wxSocketBase& sock, - wxSocketNotify evt, - char *cdata); + // finally the data streams are used to be able to write typed data into + // the above streams easily + wxDataInputStream m_dataIn; + wxDataOutputStream m_dataOut; -// --------------------------------------------------------------------------- -// wxTCPClient -// --------------------------------------------------------------------------- + wxDECLARE_NO_COPY_CLASS(wxIPCSocketStreams); +}; -wxTCPClient::wxTCPClient () - : wxClientBase() +namespace { -} -wxTCPClient::~wxTCPClient () +// an object of this class should be instantiated on the stack to write to the +// underlying socket stream +// +// this class is intentionally separated from wxIPCSocketStreams to ensure that +// Flush() is always called +class IPCOutput +{ +public: + // construct an object associated with the given streams (which must have + // life time greater than ours as we keep a reference to it) + IPCOutput(wxIPCSocketStreams *streams) + : m_streams(*streams) + { + wxASSERT_MSG( streams, "NULL streams pointer" ); + } + + // dtor calls Flush() really sending the IPC data to the network + ~IPCOutput() { m_streams.Flush(); } + + + // write a byte + void Write8(wxUint8 i) + { + m_streams.GetDataOut().Write8(i); + } + + // write the reply code and a string + void Write(IPCCode code, const wxString& str) + { + Write8(code); + m_streams.GetDataOut().WriteString(str); + } + + // write the reply code, a string and a format in this order + void Write(IPCCode code, const wxString& str, wxIPCFormat format) + { + Write(code, str); + Write8(format); + } + + // write arbitrary data + void WriteData(const void *data, size_t size) + { + m_streams.GetDataOut().Write32(size); + m_streams.GetUnformattedOut().Write(data, size); + } + + +private: + wxIPCSocketStreams& m_streams; + + wxDECLARE_NO_COPY_CLASS(IPCOutput); +}; + +} // anonymous namespace + +// ========================================================================== +// implementation +// ========================================================================== + +IMPLEMENT_DYNAMIC_CLASS(wxTCPServer, wxServerBase) +IMPLEMENT_DYNAMIC_CLASS(wxTCPClient, wxClientBase) +IMPLEMENT_CLASS(wxTCPConnection, wxConnectionBase) + +// -------------------------------------------------------------------------- +// wxTCPClient +// -------------------------------------------------------------------------- + +wxTCPClient::wxTCPClient() + : wxClientBase() { } bool wxTCPClient::ValidHost(const wxString& host) { - wxIPV4address addr; + wxIPV4address addr; - return addr.Hostname(host); + return addr.Hostname(host); } -wxConnectionBase *wxTCPClient::MakeConnection (const wxString& host, - const wxString& server_name, - const wxString& topic) +wxConnectionBase *wxTCPClient::MakeConnection(const wxString& host, + const wxString& serverName, + const wxString& topic) { - wxIPV4address addr; - wxSocketClient *client = new wxSocketClient(); - wxSocketStream *stream = new wxSocketStream(*client); - wxDataInputStream data_is(*stream); - wxDataOutputStream data_os(*stream); - - client->SetNotify(wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG); - addr.Service(server_name); - addr.Hostname(host); - - if (!client->Connect(addr)) { - delete client; - return NULL; - } - client->Notify(FALSE); - - // Send topic name, and enquire whether this has succeeded - unsigned char msg; - - data_os.Write8(IPC_CONNECT); - data_os.WriteString(topic); - - msg = data_is.Read8(); - - // OK! Confirmation. - if (msg == IPC_CONNECT) { - wxTCPConnection *connection = (wxTCPConnection *)OnMakeConnection (); - if (connection) { - if (!connection->IsKindOf(CLASSINFO(wxTCPConnection))) { - delete connection; + wxSockAddress *addr = GetAddressFromName(serverName, host); + if ( !addr ) return NULL; - } - connection->m_topic = topic; - client->Callback(Client_OnRequest); - client->CallbackData((char *)connection); - client->Notify(TRUE); - return connection; - } else { - delete client; - return NULL; + + wxSocketClient * const client = new wxSocketClient(wxSOCKET_WAITALL); + wxIPCSocketStreams * const streams = new wxIPCSocketStreams(*client); + + bool ok = client->Connect(*addr); + delete addr; + + if ( ok ) + { + // Send topic name, and enquire whether this has succeeded + IPCOutput(streams).Write(IPC_CONNECT, topic); + + unsigned char msg = streams->Read8(); + + // OK! Confirmation. + if (msg == IPC_CONNECT) + { + wxTCPConnection * + connection = (wxTCPConnection *)OnMakeConnection (); + + if (connection) + { + if (wxDynamicCast(connection, wxTCPConnection)) + { + connection->m_topic = topic; + connection->m_sock = client; + connection->m_streams = streams; + client->SetEventHandler(wxTCPEventHandlerModule::GetHandler(), + _CLIENT_ONREQUEST_ID); + client->SetClientData(connection); + client->SetNotify(wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG); + client->Notify(true); + return connection; + } + else + { + delete connection; + // and fall through to delete everything else + } + } + } } - } else { - delete client; + + // Something went wrong, delete everything + delete streams; + client->Destroy(); + return NULL; - } - return NULL; } wxConnectionBase *wxTCPClient::OnMakeConnection() { - return new wxTCPConnection; + return new wxTCPConnection(); } -// --------------------------------------------------------------------------- +// -------------------------------------------------------------------------- // wxTCPServer -// --------------------------------------------------------------------------- +// -------------------------------------------------------------------------- -wxTCPServer::wxTCPServer () - : wxServerBase() +wxTCPServer::wxTCPServer() + : wxServerBase() { + m_server = NULL; } -bool wxTCPServer::Create(const wxString& server_name) +bool wxTCPServer::Create(const wxString& serverName) { - wxIPV4address addr; - wxSocketServer *server; + // Destroy previous server, if any + if (m_server) + { + m_server->SetClientData(NULL); + m_server->Destroy(); + m_server = NULL; + } - addr.Service(server_name); + wxSockAddress *addr = GetAddressFromName(serverName); + if ( !addr ) + return false; + +#ifdef __UNIX_LIKE__ + mode_t umaskOld; + if ( addr->Type() == wxSockAddress::UNIX ) + { + // ensure that the file doesn't exist as otherwise calling socket() + // would fail + int rc = remove(serverName.fn_str()); + if ( rc < 0 && errno != ENOENT ) + { + delete addr; + + return false; + } + + // also set the umask to prevent the others from reading our file + umaskOld = umask(077); + } + else + { + // unused anyhow but shut down the compiler warnings + umaskOld = 0; + } +#endif // __UNIX_LIKE__ + + // Create a socket listening on the specified port (reusing it to allow + // restarting the server listening on the same port as was used by the + // previous instance of this server) + m_server = new wxSocketServer(*addr, wxSOCKET_WAITALL | wxSOCKET_REUSEADDR); + +#ifdef __UNIX_LIKE__ + if ( addr->Type() == wxSockAddress::UNIX ) + { + // restore the umask + umask(umaskOld); - // Create a socket listening on specified port - server = new wxSocketServer(addr); - server->Callback((wxSocketBase::wxSockCbk)Server_OnRequest); - server->SetNotify(wxSOCKET_CONNECTION_FLAG); + // save the file name to remove it later + m_filename = serverName; + } +#endif // __UNIX_LIKE__ + + delete addr; + + if (!m_server->IsOk()) + { + m_server->Destroy(); + m_server = NULL; + + return false; + } - server->CallbackData((char *)this); + m_server->SetEventHandler(wxTCPEventHandlerModule::GetHandler(), + _SERVER_ONREQUEST_ID); + m_server->SetClientData(this); + m_server->SetNotify(wxSOCKET_CONNECTION_FLAG); + m_server->Notify(true); - return TRUE; + return true; } wxTCPServer::~wxTCPServer() { + if ( m_server ) + { + m_server->SetClientData(NULL); + m_server->Destroy(); + } + +#ifdef __UNIX_LIKE__ + if ( !m_filename.empty() ) + { + if ( remove(m_filename.fn_str()) != 0 ) + { + wxLogDebug(wxT("Stale AF_UNIX file '%s' left."), m_filename.c_str()); + } + } +#endif // __UNIX_LIKE__ } -wxConnectionBase *wxTCPServer::OnAcceptConnection( const wxString& WXUNUSED(topic) ) +wxConnectionBase * +wxTCPServer::OnAcceptConnection(const wxString& WXUNUSED(topic)) { - return new wxTCPConnection(); + return new wxTCPConnection(); } -// --------------------------------------------------------------------------- +// -------------------------------------------------------------------------- // wxTCPConnection -// --------------------------------------------------------------------------- +// -------------------------------------------------------------------------- -wxTCPConnection::wxTCPConnection () - : wxConnectionBase(), - m_sock(NULL), m_sockstrm(NULL), m_codeci(NULL), m_codeco(NULL) +void wxTCPConnection::Init() { + m_sock = NULL; + m_streams = NULL; } -wxTCPConnection::wxTCPConnection(char * WXUNUSED(buffer), int WXUNUSED(size)) +wxTCPConnection::~wxTCPConnection() { -} + Disconnect(); -wxTCPConnection::~wxTCPConnection () -{ - wxDELETE(m_sock); - wxDELETE(m_codeci); - wxDELETE(m_codeco); - wxDELETE(m_sockstrm); + if ( m_sock ) + { + m_sock->SetClientData(NULL); + m_sock->Destroy(); + } + + delete m_streams; } void wxTCPConnection::Compress(bool WXUNUSED(on)) { - // Use wxLZWStream + // TODO } // Calls that CLIENT can make. -bool wxTCPConnection::Disconnect () +bool wxTCPConnection::Disconnect() { - // Send the the disconnect message to the peer. - m_codeco->Write8(IPC_DISCONNECT); - m_sock->Close(); + if ( !GetConnected() ) + return true; + + // Send the disconnect message to the peer. + IPCOutput(m_streams).Write8(IPC_DISCONNECT); + + if ( m_sock ) + { + m_sock->Notify(false); + m_sock->Close(); + } - return TRUE; + SetConnected(false); + + return true; } -bool wxTCPConnection::Execute (wxChar *data, int size, wxIPCFormat format) +bool wxTCPConnection::DoExecute(const void *data, + size_t size, + wxIPCFormat format) { - if (!m_sock->IsConnected()) - return FALSE; - - // Prepare EXECUTE message - m_codeco->Write8(IPC_EXECUTE); - m_codeco->Write8(format); - if (size < 0) - m_codeco->WriteString(data); - else { - m_codeco->Write32(size); - m_sockstrm->Write(data, size); - } - - return TRUE; + if ( !m_sock->IsConnected() ) + return false; + + // Prepare EXECUTE message + IPCOutput out(m_streams); + out.Write8(IPC_EXECUTE); + out.Write8(format); + + out.WriteData(data, size); + + return true; } -char *wxTCPConnection::Request (const wxString& item, int *size, wxIPCFormat format) +const void *wxTCPConnection::Request(const wxString& item, + size_t *size, + wxIPCFormat format) { - if (!m_sock->IsConnected()) - return NULL; + if ( !m_sock->IsConnected() ) + return NULL; - m_codeco->Write8(IPC_REQUEST); - m_codeco->WriteString(item); - m_codeco->Write8(format); + IPCOutput(m_streams).Write(IPC_REQUEST, item, format); - // If Unpack doesn't initialize it. - int ret; + const int ret = m_streams->Read8(); + if ( ret != IPC_REQUEST_REPLY ) + return NULL; - ret = m_codeci->Read8(); - if (ret == IPC_FAIL) - return NULL; - else { - size_t s; - char *data = NULL; - - s = m_codeci->Read32(); - data = new char[s]; - m_sockstrm->Read(data, s); - - if (size) - *size = s; - return data; - } + // ReadData() needs a non-NULL size pointer but the client code can call us + // with NULL pointer (this makes sense if it knows that it always works + // with NUL-terminated strings) + size_t sizeFallback; + return m_streams->ReadData(this, size ? size : &sizeFallback); } -bool wxTCPConnection::Poke (const wxString& item, wxChar *data, int size, wxIPCFormat format) +bool wxTCPConnection::DoPoke(const wxString& item, + const void *data, + size_t size, + wxIPCFormat format) { - if (!m_sock->IsConnected()) - return FALSE; - - m_codeco->Write8(IPC_POKE); - m_codeco->WriteString(item); - m_codeco->Write8(format); - if (size < 0) - m_codeco->WriteString(data); - else { - m_codeco->Write32(size); - m_sockstrm->Write(data, size); - } - - return TRUE; + if ( !m_sock->IsConnected() ) + return false; + + IPCOutput out(m_streams); + out.Write(IPC_POKE, item, format); + out.WriteData(data, size); + + return true; } -bool wxTCPConnection::StartAdvise (const wxString& item) +bool wxTCPConnection::StartAdvise(const wxString& item) { - int ret; - - if (!m_sock->IsConnected()) - return FALSE; + if ( !m_sock->IsConnected() ) + return false; - m_codeco->Write8(IPC_ADVISE_START); - m_codeco->WriteString(item); + IPCOutput(m_streams).Write(IPC_ADVISE_START, item); - ret = m_codeci->Read8(); + const int ret = m_streams->Read8(); - if (ret != IPC_FAIL) - return TRUE; - else - return FALSE; + return ret == IPC_ADVISE_START; } bool wxTCPConnection::StopAdvise (const wxString& item) { - int msg; + if ( !m_sock->IsConnected() ) + return false; - if (!m_sock->IsConnected()) - return FALSE; + IPCOutput(m_streams).Write(IPC_ADVISE_STOP, item); - m_codeco->Write8(IPC_ADVISE_STOP); - m_codeco->WriteString(item); + const int ret = m_streams->Read8(); - msg = m_codeci->Read8(); - - if (msg != IPC_FAIL) - return TRUE; - else - return FALSE; + return ret == IPC_ADVISE_STOP; } // Calls that SERVER can make -bool wxTCPConnection::Advise (const wxString& item, - wxChar *data, int size, wxIPCFormat format) +bool wxTCPConnection::DoAdvise(const wxString& item, + const void *data, + size_t size, + wxIPCFormat format) { - if (!m_sock->IsConnected()) - return FALSE; - - m_codeco->Write8(IPC_ADVISE); - m_codeco->WriteString(item); - m_codeco->Write8(format); - if (size < 0) - m_codeco->WriteString(data); - else { - m_codeco->Write32(size); - m_sockstrm->Write(data, size); - } - - return TRUE; + if ( !m_sock->IsConnected() ) + return false; + + IPCOutput out(m_streams); + out.Write(IPC_ADVISE, item, format); + out.WriteData(data, size); + + return true; } -void Client_OnRequest(wxSocketBase& sock, wxSocketNotify evt, - char *cdata) +// -------------------------------------------------------------------------- +// wxTCPEventHandler (private class) +// -------------------------------------------------------------------------- + +BEGIN_EVENT_TABLE(wxTCPEventHandler, wxEvtHandler) + EVT_SOCKET(_CLIENT_ONREQUEST_ID, wxTCPEventHandler::Client_OnRequest) + EVT_SOCKET(_SERVER_ONREQUEST_ID, wxTCPEventHandler::Server_OnRequest) +END_EVENT_TABLE() + +void wxTCPEventHandler::HandleDisconnect(wxTCPConnection *connection) { - int msg = 0; - wxTCPConnection *connection = (wxTCPConnection *)cdata; - wxDataInputStream *codeci; - wxDataOutputStream *codeco; - wxSocketStream *sockstrm; - wxString topic_name = connection->m_topic; - wxString item; - - // The socket handler signals us that we lost the connection: destroy all. - if (evt == wxSOCKET_LOST) { - sock.Close(); - connection->OnDisconnect(); - return; - } - - // Receive message number. - codeci = connection->m_codeci; - codeco = connection->m_codeco; - sockstrm = connection->m_sockstrm; - msg = codeci->Read8(); - - switch (msg) { - case IPC_EXECUTE: { - char *data; - size_t size; - wxIPCFormat format; - - format = (wxIPCFormat)codeci->Read8(); - size = codeci->Read32(); - data = new char[size]; - sockstrm->Read(data, size); - - connection->OnExecute (topic_name, data, size, format); - - delete [] data; - break; - } - case IPC_ADVISE: { - char *data; - size_t size; - wxIPCFormat format; - - item = codeci->ReadString(); - format = (wxIPCFormat)codeci->Read8(); - size = codeci->Read32(); - data = new char[size]; - sockstrm->Read(data, size); - - connection->OnAdvise (topic_name, item, data, size, format); - - delete [] data; - break; - } - case IPC_ADVISE_START: { - item = codeci->ReadString(); - - bool ok = connection->OnStartAdvise (topic_name, item); - if (ok) - codeco->Write8(IPC_ADVISE_START); - else - codeco->Write8(IPC_FAIL); + // connection was closed (either gracefully or not): destroy everything + connection->m_sock->Notify(false); + connection->m_sock->Close(); - break; - } - case IPC_ADVISE_STOP: { - item = codeci->ReadString(); + // don't leave references to this soon-to-be-dangling connection in the + // socket as it won't be destroyed immediately as its destruction will be + // delayed in case there are more events pending for it + connection->m_sock->SetClientData(NULL); - bool ok = connection->OnStopAdvise (topic_name, item); - if (ok) - codeco->Write8(IPC_ADVISE_STOP); - else - codeco->Write8(IPC_FAIL); - - break; - } - case IPC_POKE: { - wxIPCFormat format; - size_t size; - wxChar *data; - - item = codeci->ReadString(); - format = (wxIPCFormat)codeci->Read8(); - size = codeci->Read32(); - data = new wxChar[size]; - sockstrm->Read(data, size); - - connection->OnPoke (topic_name, item, data, size, format); - - delete [] data; - - break; - } - case IPC_REQUEST: { - wxIPCFormat format; - - item = codeci->ReadString(); - format = (wxIPCFormat)codeci->Read8(); - - int user_size = -1; - char *user_data = connection->OnRequest (topic_name, item, &user_size, format); - - if (user_data) { - codeco->Write8(IPC_REQUEST_REPLY); - if (user_size != -1) { - codeco->Write32(user_size); - sockstrm->Write(user_data, user_size); - } else - codeco->WriteString(user_data); - } else - codeco->Write8(IPC_FAIL); - - break; - } - case IPC_DISCONNECT: { - sock.Close(); + connection->SetConnected(false); connection->OnDisconnect(); - break; - } - default: - codeco->Write8(IPC_FAIL); - break; - } } -void Server_OnRequest(wxSocketServer& server, - wxSocketNotify evt, char *cdata) +void wxTCPEventHandler::Client_OnRequest(wxSocketEvent &event) { - wxTCPServer *ipcserv = (wxTCPServer *)cdata; - wxSocketStream *stream; - wxDataInputStream *codeci; - wxDataOutputStream *codeco; - - if (evt != wxSOCKET_CONNECTION) - return; - - /* Accept the connection, getting a new socket */ - wxSocketBase *sock = server.Accept(); - sock->Notify(FALSE); - sock->SetNotify(wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG); - - stream = new wxSocketStream(*sock); - codeci = new wxDataInputStream(*stream); - codeco = new wxDataOutputStream(*stream); - - if (!sock->Ok()) - return; - - int msg; - msg = codeci->Read8(); - - if (msg == IPC_CONNECT) { - wxString topic_name; - topic_name = codeci->ReadString(); - - /* Register new socket with the notifier */ - wxTCPConnection *new_connection = - (wxTCPConnection *)ipcserv->OnAcceptConnection (topic_name); - if (new_connection) { - if (!new_connection->IsKindOf(CLASSINFO(wxTCPConnection))) { - delete new_connection; - codeco->Write8(IPC_FAIL); + wxSocketBase *sock = event.GetSocket(); + if (!sock) return; - } - // Acknowledge success - codeco->Write8(IPC_CONNECT); - - new_connection->m_topic = topic_name; - new_connection->m_sockstrm = stream; - new_connection->m_codeci = codeci; - new_connection->m_codeco = codeco; - sock->Callback(Client_OnRequest); - sock->CallbackData((char *)new_connection); - sock->Notify(TRUE); - } else { - // Send failure message - codeco->Write8(IPC_FAIL); + + wxSocketNotify evt = event.GetSocketEvent(); + wxTCPConnection * const + connection = static_cast(sock->GetClientData()); + + // This socket is being deleted; skip this event + if (!connection) + return; + + if ( evt == wxSOCKET_LOST ) + { + HandleDisconnect(connection); + return; + } + + // Receive message number. + wxIPCSocketStreams * const streams = connection->m_streams; + + const wxString topic = connection->m_topic; + wxString item; + + bool error = false; + + const int msg = streams->Read8(); + switch ( msg ) + { + case IPC_EXECUTE: + { + wxIPCFormat format; + size_t size wxDUMMY_INITIALIZE(0); + void * const + data = streams->ReadFormatData(connection, &format, &size); + if ( data ) + connection->OnExecute(topic, data, size, format); + else + error = true; + } + break; + + case IPC_ADVISE: + { + item = streams->ReadString(); + + wxIPCFormat format; + size_t size wxDUMMY_INITIALIZE(0); + void * const + data = streams->ReadFormatData(connection, &format, &size); + + if ( data ) + connection->OnAdvise(topic, item, data, size, format); + else + error = true; + } + break; + + case IPC_ADVISE_START: + { + item = streams->ReadString(); + + IPCOutput(streams).Write8(connection->OnStartAdvise(topic, item) + ? IPC_ADVISE_START + : IPC_FAIL); + } + break; + + case IPC_ADVISE_STOP: + { + item = streams->ReadString(); + + IPCOutput(streams).Write8(connection->OnStopAdvise(topic, item) + ? IPC_ADVISE_STOP + : IPC_FAIL); + } + break; + + case IPC_POKE: + { + item = streams->ReadString(); + wxIPCFormat format = (wxIPCFormat)streams->Read8(); + + size_t size wxDUMMY_INITIALIZE(0); + void * const data = streams->ReadData(connection, &size); + + if ( data ) + connection->OnPoke(topic, item, data, size, format); + else + error = true; + } + break; + + case IPC_REQUEST: + { + item = streams->ReadString(); + + wxIPCFormat format = (wxIPCFormat)streams->Read8(); + + size_t user_size = wxNO_LEN; + const void *user_data = connection->OnRequest(topic, + item, + &user_size, + format); + + if ( !user_data ) + { + IPCOutput(streams).Write8(IPC_FAIL); + break; + } + + IPCOutput out(streams); + out.Write8(IPC_REQUEST_REPLY); + + if ( user_size == wxNO_LEN ) + { + switch ( format ) + { + case wxIPC_TEXT: + case wxIPC_UTF8TEXT: + user_size = strlen((const char *)user_data) + 1; // includes final NUL + break; + case wxIPC_UNICODETEXT: + user_size = (wcslen((const wchar_t *)user_data) + 1) * sizeof(wchar_t); // includes final NUL + break; + default: + user_size = 0; + } + } + + out.WriteData(user_data, user_size); + } + break; + + case IPC_DISCONNECT: + HandleDisconnect(connection); + break; + + case IPC_FAIL: + wxLogDebug("Unexpected IPC_FAIL received"); + error = true; + break; + + default: + wxLogDebug("Unknown message code %d received.", msg); + error = true; + break; } - } + + if ( error ) + IPCOutput(streams).Write8(IPC_FAIL); } -#endif - // wxUSE_SOCKETS +void wxTCPEventHandler::Server_OnRequest(wxSocketEvent &event) +{ + wxSocketServer *server = (wxSocketServer *) event.GetSocket(); + if (!server) + return; + wxTCPServer *ipcserv = (wxTCPServer *) server->GetClientData(); + + // This socket is being deleted; skip this event + if (!ipcserv) + return; + + if (event.GetSocketEvent() != wxSOCKET_CONNECTION) + return; + + // Accept the connection, getting a new socket + wxSocketBase *sock = server->Accept(); + if (!sock) + return; + if (!sock->IsOk()) + { + sock->Destroy(); + return; + } + + wxIPCSocketStreams *streams = new wxIPCSocketStreams(*sock); + + { + IPCOutput out(streams); + + const int msg = streams->Read8(); + if ( msg == IPC_CONNECT ) + { + const wxString topic = streams->ReadString(); + + wxTCPConnection *new_connection = + (wxTCPConnection *)ipcserv->OnAcceptConnection (topic); + + if (new_connection) + { + if (wxDynamicCast(new_connection, wxTCPConnection)) + { + // Acknowledge success + out.Write8(IPC_CONNECT); + + new_connection->m_sock = sock; + new_connection->m_streams = streams; + new_connection->m_topic = topic; + sock->SetEventHandler(wxTCPEventHandlerModule::GetHandler(), + _CLIENT_ONREQUEST_ID); + sock->SetClientData(new_connection); + sock->SetNotify(wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG); + sock->Notify(true); + return; + } + else + { + delete new_connection; + // and fall through to delete everything else + } + } + } + + // Something went wrong, send failure message and delete everything + out.Write8(IPC_FAIL); + } // IPCOutput object is destroyed here, before destroying stream + + delete streams; + sock->Destroy(); +} + +#endif // wxUSE_SOCKETS && wxUSE_IPC && wxUSE_STREAMS