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/*-*-c++-*-
* $Id$
*
* This file is part of plptools.
*
* Copyright (C) 1999 Philip Proudman <philip.proudman@btinternet.com>
* Copyright (C) 1999-2001 Fritz Elfert <felfert@to.com>
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stream.h>
#include <stdio.h>
#include <string.h>
#include <malloc.h>
#include "socketchan.h"
#include "ncp.h"
#include <ppsocket.h>
socketChan:: socketChan(ppsocket * _skt, ncp * _ncpController):
channel(_ncpController)
{
skt = _skt;
registerName = 0;
connectTry = 0;
connected = false;
}
socketChan::~socketChan()
{
skt->closeSocket();
delete skt;
if (registerName)
free(registerName);
}
void socketChan::
ncpDataCallback(bufferStore & a)
{
if (registerName != 0) {
skt->sendBufferStore(a);
} else
cerr << "socketchan: Connect without name!!!\n";
}
char *socketChan::
getNcpRegisterName()
{
return registerName;
}
// NCP Command processing
bool socketChan::
ncpCommand(bufferStore & a)
{
cerr << "socketChan:: received NCP command (" << a << ")" << endl;
// str is guaranteed to begin with NCP$, and all NCP commands are
// greater than or equal to 8 characters in length.
const char *str = a.getString();
// unsigned long len = a.getLen();
bool ok = false;
if (!strncmp(str+4, "INFO", 4)) {
// Send information discovered during the receipt of the
// NCON_MSG_NCP_INFO message.
a.init();
switch (ncpProtocolVersion()) {
case PV_SERIES_3:
a.addStringT("Series 3");
break;
case PV_SERIES_5:
a.addStringT("Series 5");
break;
default:
cerr << "ncpd: protocol version not known" << endl;
a.addStringT("Unknown!");
break;
}
skt->sendBufferStore(a);
ok = true;
} else if (!strncmp(str+4, "CONN", 4)) {
// Connect to a channel that was placed in 'pending' mode, by
// checking the channel table against the ID...
// DO ME LATER
ok = true;
} else if (!strncmp(str+4, "CHAL", 4)) {
// Challenge
// The idea is that the channel stays in 'secure' mode until a
// valid RESP is received
// DO ME LATER
ok = true;
} else if (!strncmp(str+4, "RESP", 4)) {
// Reponse - here is the plaintext as sent in the CHAL - the
// channel will only open up if this matches what ncpd has for
// the encrypted plaintext.
// DO ME LATER
ok = true;
}
return ok;
}
void socketChan::
ncpConnectAck()
{
bufferStore a;
a.addStringT("Ok");
skt->sendBufferStore(a);
connected = true;
connectTry = 3;
}
void socketChan::
ncpConnectTerminate()
{
connectTry = 0;
skt->closeSocket();
terminateWhenAsked();
}
void socketChan::
ncpRegisterAck()
{
connectTry++;
ncpConnect();
}
void socketChan::
ncpConnectNak()
{
if (!registerName || (connectTry > 1))
ncpConnectTerminate();
else {
connectTry++;
tryStamp = time(0);
ncpRegister();
}
}
void socketChan::
socketPoll()
{
int res;
if (registerName == 0) {
bufferStore a;
res = skt->getBufferStore(a, false);
switch (res) {
case 1:
// A client has connected, and is announcing who it
// is... e.g. "SYS$RFSV.*"
//
// An NCP Channel can be in 'Control' or 'Data' mode.
// Initially, it is in 'Control' mode, and can accept
// certain commands.
//
// When a command is received that ncpd does not
// understand, this is assumed to be a request to
// connect to the remote service of that name, and enter
// 'data' mode.
//
// Later, there might be an explicit command to enter
// 'data' mode, and also a challenge-response protocol
// before any connection can be made.
//
// All commands begin with "NCP$".
// There is a magic process name called "NCP$INFO.*"
// which is announced by the rfsvfactory. This causes a
// response to be issued containing the NCP version
// number. The rfsvfactory will create the correct type
// of RFSV protocol handler, which will then announce
// itself. So, first time in here, we might get the
// NCP$INFO.*
if (a.getLen() > 8 && !strncmp(a.getString(), "NCP$", 4)) {
if (!ncpCommand(a))
cerr << "ncpd: command " << a << " unrecognized."
<< endl;
return;
}
// This isn't a command, it's a remote process. Connect.
registerName = strdup(a.getString());
connectTry++;
// If this is SYS$RFSV, we immediately connect. In all
// other cases, we first perform a registration. Connect
// is then triggered by RegisterAck and uses the name
// we received from the Psion.
tryStamp = time(0);
if (strncmp(registerName, "SYS$RFSV", 8) == 0)
ncpConnect();
else
ncpRegister();
break;
case -1:
ncpConnectTerminate();
break;
}
} else if (connected) {
bufferStore a;
res = skt->getBufferStore(a, false);
if (res == -1) {
ncpDisconnect();
skt->closeSocket();
} else if (res == 1) {
ncpSend(a);
}
} else if (time(0) > (tryStamp + 15))
terminateWhenAsked();
}
bool socketChan::
isConnected()
const {
return connected;
}
/*
* Local variables:
* c-basic-offset: 4
* End:
*/
|
