/////////////////////////////////////////////////////////////////////////////
-// 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 <guille@iies.es>
+// 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 <stdlib.h>
#include <stdio.h>
+#include <errno.h>
#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 <sys/types.h>
+ #include <sys/stat.h>
+#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<wxIPCFormat>(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,
- GSocketEvent evt,
- char *cdata);
-void Client_OnRequest(wxSocketBase& sock,
- GSocketEvent 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 (void)
- : wxClientBase()
+namespace
{
-}
-wxTCPClient::~wxTCPClient (void)
+// 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(GSOCK_INPUT_FLAG | GSOCK_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 (void)
- : 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(GSOCK_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(void)
+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 (void)
- : 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 *buffer, int size)
+wxTCPConnection::~wxTCPConnection()
{
-}
+ Disconnect();
-wxTCPConnection::~wxTCPConnection (void)
-{
- 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 (void)
+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, GSocketEvent 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 == GSOCK_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,
- GSocketEvent evt, char *cdata)
+void wxTCPEventHandler::Client_OnRequest(wxSocketEvent &event)
{
- wxTCPServer *ipcserv = (wxTCPServer *)cdata;
- wxSocketStream *stream;
- wxDataInputStream *codeci;
- wxDataOutputStream *codeco;
-
- if (evt != GSOCK_CONNECTION)
- return;
-
- /* Accept the connection, getting a new socket */
- wxSocketBase *sock = server.Accept();
- sock->Notify(FALSE);
- sock->SetNotify(GSOCK_INPUT_FLAG | GSOCK_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<wxTCPConnection *>(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
projects / wxWidgets.git / blobdiff