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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2014 Jean-Pierre Charras, jp.charras at wanadoo.fr
* Copyright (C) 2014 KiCad Developers, see CHANGELOG.TXT for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @file eda_dde.cpp
*/
#include <fctsys.h>
#include <eda_dde.h>
#include <draw_frame.h>
#include <id.h>
#include <common.h>
#include <macros.h>
static const wxString HOSTNAME( wxT( "localhost" ) );
// buffer for read and write data in socket connections
#define IPC_BUF_SIZE 4096
static char client_ipc_buffer[IPC_BUF_SIZE];
static wxSocketServer* server;
/**********************************/
/* Routines related to the server */
/**********************************/
/* Function to initialize a server socket
*/
wxSocketServer* CreateServer( wxWindow* window, int service, bool local )
{
wxIPV4address addr;
// Set the port number
addr.Service( service );
// Listen on localhost only if requested
if( local )
addr.Hostname( HOSTNAME );
server = new wxSocketServer( addr );
if( server )
{
server->SetNotify( wxSOCKET_CONNECTION_FLAG );
server->SetEventHandler( *window, ID_EDA_SOCKET_EVENT_SERV );
server->Notify( true );
}
return server;
}
/* Function called on every client request.
*/
void EDA_DRAW_FRAME::OnSockRequest( wxSocketEvent& evt )
{
size_t len;
wxSocketBase* sock = evt.GetSocket();
switch( evt.GetSocketEvent() )
{
case wxSOCKET_INPUT:
sock->Read( client_ipc_buffer, 1 );
if( sock->LastCount() == 0 )
break; // No data, occurs on opening connection
sock->Read( client_ipc_buffer + 1, IPC_BUF_SIZE - 2 );
len = 1 + sock->LastCount();
client_ipc_buffer[len] = 0;
ExecuteRemoteCommand( client_ipc_buffer );
break;
case wxSOCKET_LOST:
return;
break;
default:
wxPrintf( wxT( "EDA_DRAW_FRAME::OnSockRequest() error: Invalid event !" ) );
break;
}
}
/* Function called when a connection is requested by a client.
*/
void EDA_DRAW_FRAME::OnSockRequestServer( wxSocketEvent& evt )
{
wxSocketBase* sock2;
wxSocketServer* server = (wxSocketServer*) evt.GetSocket();
sock2 = server->Accept();
if( sock2 == NULL )
return;
sock2->Notify( true );
sock2->SetEventHandler( *this, ID_EDA_SOCKET_EVENT );
sock2->SetNotify( wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG );
}
/**********************************/
/* Routines related to the CLIENT */
/**********************************/
/* Used by a client to sent (by a socket connection) a data to a server.
* - Open a Socket Client connection
* - Send the buffer cmdline
* - Close the socket connection
*
* service is the service number for the TC/IP connection
*/
bool SendCommand( int service, const char* cmdline )
{
wxSocketClient* sock_client;
bool success = false;
wxIPV4address addr;
// Create a connexion
addr.Hostname( HOSTNAME );
addr.Service( service );
// Mini-tutorial for Connect() :-)
// (JP CHARRAS Note: see wxWidgets: sockets/client.cpp sample)
// ---------------------------
//
// There are two ways to use Connect(): blocking and non-blocking,
// depending on the value passed as the 'wait' (2nd) parameter.
//
// Connect(addr, true) will wait until the connection completes,
// returning true on success and false on failure. This call blocks
// the GUI (this might be changed in future releases to honor the
// wxSOCKET_BLOCK flag).
//
// Connect(addr, false) will issue a nonblocking connection request
// and return immediately. If the return value is true, then the
// connection has been already successfully established. If it is
// false, you must wait for the request to complete, either with
// WaitOnConnect() or by watching wxSOCKET_CONNECTION / LOST
// events (please read the documentation).
//
// WaitOnConnect() itself never blocks the GUI (this might change
// in the future to honor the wxSOCKET_BLOCK flag). This call will
// return false on timeout, or true if the connection request
// completes, which in turn might mean:
//
// a) That the connection was successfully established
// b) That the connection request failed (for example, because
// it was refused by the peer.
//
// Use IsConnected() to distinguish between these two.
//
// So, in a brief, you should do one of the following things:
//
// For blocking Connect:
//
// bool success = client->Connect(addr, true);
//
// For nonblocking Connect:
//
// client->Connect(addr, false);
//
// bool waitmore = true;
// while (! client->WaitOnConnect(seconds, millis) && waitmore )
// {
// // possibly give some feedback to the user,
// // update waitmore if needed.
// }
// bool success = client->IsConnected();
//
// And that's all :-)
sock_client = new wxSocketClient();
sock_client->SetTimeout( 2 ); // Time out in Seconds
sock_client->Connect( addr, false );
sock_client->WaitOnConnect( 0, 100 );
if( sock_client->Ok() && sock_client->IsConnected() )
{
success = true;
sock_client->SetFlags( wxSOCKET_NOWAIT /*wxSOCKET_WAITALL*/ );
sock_client->Write( cmdline, strlen( cmdline ) );
}
sock_client->Close();
sock_client->Destroy();
return success;
}
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