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// $Id$
//
// PLP - An implementation of the PSION link protocol
//
// Copyright (C) 1999 Philip Proudman
// Modifications for plptools:
// Copyright (C) 1999 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
//
// e-mail philip.proudman@btinternet.com
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string>
#include <stream.h>
#include <stdlib.h>
#include <signal.h>
#include <errno.h>
#include "ncp.h"
#include "bufferstore.h"
#include "ppsocket.h"
#include "socketchan.h"
#include "iowatch.h"
#include "linkchan.h"
#include "link.h"
#include "packet.h"
#include "log.h"
static bool verbose = false;
static bool active = true;
static RETSIGTYPE
term_handler(int)
{
cout << "Got SIGTERM" << endl;
signal(SIGTERM, term_handler);
active = false;
};
static RETSIGTYPE
int_handler(int)
{
cout << "Got SIGINT" << endl;
signal(SIGINT, int_handler);
active = false;
};
void
checkForNewSocketConnection(ppsocket & skt, int &numScp, socketChan ** scp, ncp * a, IOWatch &iow)
{
string peer;
ppsocket *next = skt.accept(&peer);
if (next != NULL) {
// New connect
if (verbose)
cout << "New socket connection from " << peer << endl;
if ((numScp == 7) || (!a->gotLinkChannel())) {
bufferStore a;
// Give the client time to send it's version request.
next->dataToGet(1,0);
next->getBufferStore(a, false);
a.init();
a.addStringT("No Psion Connected\n");
next->sendBufferStore(a);
next->closeSocket();
} else
scp[numScp++] = new socketChan(next, a);
}
}
void
pollSocketConnections(int &numScp, socketChan ** scp)
{
for (int i = 0; i < numScp; i++) {
scp[i]->socketPoll();
if (scp[i]->terminate()) {
// Requested channel termination
delete scp[i];
numScp--;
for (int j = i; j < numScp; j++)
scp[j] = scp[j + 1];
i--;
}
}
}
void
usage()
{
cerr << "Usage : ncpd [-V] [-v logclass] [-d] [-e] [-p <port>] [-s <device>] [-b <baudrate>]\n";
exit(1);
}
int
main(int argc, char **argv)
{
ppsocket skt;
IOWatch iow;
int pid;
bool dofork = true;
bool autoexit = false;
int sockNum = DPORT;
int baudRate = DSPEED;
const char *serialDevice = NULL;
short int nverbose = 0;
short int pverbose = 0;
short int lverbose = 0;
struct servent *se = getservbyname("psion", "tcp");
endservent();
if (se != 0L)
sockNum = ntohs(se->s_port);
// Command line parameter processing
for (int i = 1; i < argc; i++) {
if (!strcmp(argv[i], "-p") && i + 1 < argc) {
sockNum = atoi(argv[++i]);
} else if (!strcmp(argv[i], "-s") && i + 1 < argc) {
serialDevice = argv[++i];
} else if (!strcmp(argv[i], "-v") && i + 1 < argc) {
i++;
if (!strcmp(argv[i], "nl"))
nverbose |= NCP_DEBUG_LOG;
if (!strcmp(argv[i], "nd"))
nverbose |= NCP_DEBUG_DUMP;
if (!strcmp(argv[i], "ll"))
lverbose |= LNK_DEBUG_LOG;
if (!strcmp(argv[i], "ld"))
lverbose |= LNK_DEBUG_DUMP;
if (!strcmp(argv[i], "pl"))
pverbose |= PKT_DEBUG_LOG;
if (!strcmp(argv[i], "pd"))
pverbose |= PKT_DEBUG_DUMP;
if (!strcmp(argv[i], "ph"))
pverbose |= PKT_DEBUG_HANDSHAKE;
if (!strcmp(argv[i], "m"))
verbose = true;
if (!strcmp(argv[i], "all")) {
nverbose = NCP_DEBUG_LOG | NCP_DEBUG_DUMP;
lverbose = LNK_DEBUG_LOG | LNK_DEBUG_DUMP;
pverbose = PKT_DEBUG_LOG | PKT_DEBUG_DUMP |
PKT_DEBUG_HANDSHAKE;
verbose = true;
}
} else if (!strcmp(argv[i], "-b") && i + 1 < argc) {
baudRate = atoi(argv[++i]);
} else if (!strcmp(argv[i], "-d")) {
dofork = 0;
} else if (!strcmp(argv[i], "-e")) {
autoexit = true;
} else if (!strcmp(argv[i], "-V")) {
cout << "ncpd version " << VERSION << endl;
exit(0);
} else
usage();
}
if (serialDevice == NULL) {
// If started with -e, assume being started from mgetty and
// use the tty opened by mgetty instead of the builtin default.
if (autoexit)
serialDevice = ttyname(0);
else
serialDevice = DDEV;
}
if (dofork)
pid = fork();
else
pid = 0;
switch (pid) {
case 0:
signal(SIGTERM, term_handler);
signal(SIGINT, int_handler);
skt.setWatch(&iow);
if (!skt.listen("127.0.0.1", sockNum))
cerr << "listen on port " << sockNum << ": " << strerror(errno) << endl;
else {
if (dofork || autoexit) {
logbuf dlog(LOG_DEBUG);
logbuf elog(LOG_ERR);
ostream lout(&dlog);
ostream lerr(&elog);
cout = lout;
cerr = lerr;
openlog("ncpd", LOG_CONS|LOG_PID, LOG_DAEMON);
syslog(LOG_INFO,
"daemon started. Listening at 127.0.0.1:%d, using device %s\n",
sockNum, serialDevice);
}
ncp *a = new ncp(serialDevice, baudRate, iow);
int numScp = 0;
socketChan *scp[MAX_CHANNEL+1];
a->setVerbose(nverbose);
a->setLinkVerbose(lverbose);
a->setPktVerbose(pverbose);
while (active) {
// sockets
pollSocketConnections(numScp, scp);
checkForNewSocketConnection(skt, numScp, scp, a, iow);
// psion
a->poll();
if (a->stuffToSend())
iow.watch(0, 100000);
else
iow.watch(1, 0);
if (a->hasFailed()) {
if (autoexit)
break;
iow.watch(5, 0);
if (verbose)
cout << "ncp: restarting\n";
a->reset();
}
}
delete a;
}
skt.closeSocket();
break;
case -1:
cerr << "fork: " << strerror(errno) << endl;
break;
default:
exit(0);
}
}
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