sckipc.cpp

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  if ( !GetConnected() )
      return true;
  // Send the the disconnect message to the peer.
  m_codeco->Write8(IPC_DISCONNECT);
  m_sock->Notify(false);
  m_sock->Close();
  SetConnected(false);

  return true;
}

bool wxTCPConnection::Execute(const wxChar *data, int size, wxIPCFormat format)
{
  if (!m_sock->IsConnected())
    return false;

  // Prepare EXECUTE message
  m_codeco->Write8(IPC_EXECUTE);
  m_codeco->Write8(format);

  if (size < 0)
    size = (wxStrlen(data) + 1) * sizeof(wxChar);    // includes final NUL

  m_codeco->Write32(size);
  m_sockstrm->Write(data, size);

  return true;
}

wxChar *wxTCPConnection::Request (const wxString& item, int *size, wxIPCFormat format)
{
  if (!m_sock->IsConnected())
    return NULL;

  m_codeco->Write8(IPC_REQUEST);
  m_codeco->WriteString(item);
  m_codeco->Write8(format);

  // If Unpack doesn't initialize it.
  int ret;

  ret = m_codeci->Read8();
  if (ret == IPC_FAIL)
    return NULL;
  else
  {
    size_t s;

    s = m_codeci->Read32();
    wxChar *data = GetBufferAtLeast( s );
    wxASSERT_MSG(data != NULL,
                 _T("Buffer too small in wxTCPConnection::Request") );
    m_sockstrm->Read(data, s);

    if (size)
      *size = s;
    return data;
  }
}

bool wxTCPConnection::Poke (const wxString& item, wxChar *data, int 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)
    size = (wxStrlen(data) + 1) * sizeof(wxChar);    // includes final NUL

  m_codeco->Write32(size);
  m_sockstrm->Write(data, size);

  return true;
}

bool wxTCPConnection::StartAdvise (const wxString& item)
{
  int ret;

  if (!m_sock->IsConnected())
    return false;

  m_codeco->Write8(IPC_ADVISE_START);
  m_codeco->WriteString(item);

  ret = m_codeci->Read8();

  if (ret != IPC_FAIL)
    return true;
  else
    return false;
}

bool wxTCPConnection::StopAdvise (const wxString& item)
{
  int msg;

  if (!m_sock->IsConnected())
    return false;

  m_codeco->Write8(IPC_ADVISE_STOP);
  m_codeco->WriteString(item);

  msg = m_codeci->Read8();

  if (msg != IPC_FAIL)
    return true;
  else
    return false;
}

// Calls that SERVER can make
bool wxTCPConnection::Advise (const wxString& item,
                              wxChar *data, int 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)
    size = (wxStrlen(data) + 1) * sizeof(wxChar);    // includes final NUL

  m_codeco->Write32(size);
  m_sockstrm->Write(data, size);

  return true;
}

// --------------------------------------------------------------------------
// 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::Client_OnRequest(wxSocketEvent &event)
{
  wxSocketBase *sock = event.GetSocket();
  wxSocketNotify evt = event.GetSocketEvent();
  wxTCPConnection *connection = (wxTCPConnection *)(sock->GetClientData());

  // This socket is being deleted; skip this event
  if (!connection)
    return;

  wxDataInputStream *codeci;
  wxDataOutputStream *codeco;
  wxSocketStream *sockstrm;
  wxString topic_name = connection->m_topic;
  wxString item;

  // We lost the connection: destroy everything
  if (evt == wxSOCKET_LOST)
  {
    sock->Notify(false);
    sock->Close();
    connection->OnDisconnect();
    return;
  }

  // Receive message number.
  codeci = connection->m_codeci;
  codeco = connection->m_codeco;
  sockstrm = connection->m_sockstrm;
  int msg = codeci->Read8();

  switch (msg)
  {
  case IPC_EXECUTE:
  {
    wxChar *data;
    size_t size;
    wxIPCFormat format;

    format = (wxIPCFormat)codeci->Read8();
    size = codeci->Read32();
    data = connection->GetBufferAtLeast( size );
    wxASSERT_MSG(data != NULL,
                 _T("Buffer too small in wxTCPEventHandler::Client_OnRequest") );
    sockstrm->Read(data, size);

    connection->OnExecute (topic_name, data, size, format);

    break;
  }
  case IPC_ADVISE:
  {
    wxChar *data;
    size_t size;
    wxIPCFormat format;

    item = codeci->ReadString();
    format = (wxIPCFormat)codeci->Read8();
    size = codeci->Read32();
    data = connection->GetBufferAtLeast( size );
    wxASSERT_MSG(data != NULL,
                 _T("Buffer too small in wxTCPEventHandler::Client_OnRequest") );
    sockstrm->Read(data, size);

    connection->OnAdvise (topic_name, item, data, size, format);

    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);

    break;
  }
  case IPC_ADVISE_STOP:
  {
    item = codeci->ReadString();

    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 = connection->GetBufferAtLeast( size );
    wxASSERT_MSG(data != NULL,
                 _T("Buffer too small in wxTCPEventHandler::Client_OnRequest") );
    sockstrm->Read(data, size);

    connection->OnPoke (topic_name, item, data, size, format);

    break;
  }
  case IPC_REQUEST:
  {
    wxIPCFormat format;

    item = codeci->ReadString();
    format = (wxIPCFormat)codeci->Read8();

    int user_size = -1;
    wxChar *user_data = connection->OnRequest (topic_name, item, &user_size, format);

    if (user_data)
    {
      codeco->Write8(IPC_REQUEST_REPLY);

      if (user_size == -1)
        user_size = (wxStrlen(user_data) + 1) * sizeof(wxChar);    // includes final NUL

      codeco->Write32(user_size);
      sockstrm->Write(user_data, user_size);
    }
    else
      codeco->Write8(IPC_FAIL);

    break;
  }
  case IPC_DISCONNECT:
  {
    sock->Notify(false);
    sock->Close();
    connection->SetConnected(false);
    connection->OnDisconnect();
    break;
  }
  default:
    codeco->Write8(IPC_FAIL);
    break;
  }
}

void wxTCPEventHandler::Server_OnRequest(wxSocketEvent &event)
{
  wxSocketServer *server = (wxSocketServer *) event.GetSocket();
  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->Ok())
  {
    sock->Destroy();
    return;
  }

  wxSocketStream *stream     = new wxSocketStream(*sock);
  wxDataInputStream *codeci  = new wxDataInputStream(*stream);
  wxDataOutputStream *codeco = new wxDataOutputStream(*stream);

  int msg;
  msg = codeci->Read8();

  if (msg == IPC_CONNECT)
  {
    wxString topic_name;
    topic_name = codeci->ReadString();

    wxTCPConnection *new_connection =
         (wxTCPConnection *)ipcserv->OnAcceptConnection (topic_name);

    if (new_connection)
    {
      if (new_connection->IsKindOf(CLASSINFO(wxTCPConnection)))
      {
        // Acknowledge success
        codeco->Write8(IPC_CONNECT);
        new_connection->m_topic = topic_name;
        new_connection->m_sock = sock;
        new_connection->m_sockstrm = stream;
        new_connection->m_codeci = codeci;
        new_connection->m_codeco = codeco;
        sock->SetEventHandler(*gs_handler, _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
  codeco->Write8(IPC_FAIL);

  delete codeco;
  delete codeci;
  delete stream;
  sock->Destroy();
}

// --------------------------------------------------------------------------
// wxTCPEventHandlerModule (private class)
// --------------------------------------------------------------------------

class wxTCPEventHandlerModule: public wxModule
{
  DECLARE_DYNAMIC_CLASS(wxTCPEventHandlerModule)

public:
  bool OnInit() { gs_handler = new wxTCPEventHandler(); return true; }
  void OnExit() { wxDELETE(gs_handler); }
};

IMPLEMENT_DYNAMIC_CLASS(wxTCPEventHandlerModule, wxModule)


#endif
    // wxUSE_SOCKETS && wxUSE_IPC