aboutsummaryrefslogtreecommitdiffstats
path: root/ncpd/main.cc
blob: 7f2ff3e5b6c5eb7667fd651d857a91fc27b6a99e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
/*-*-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 <stdio.h>
#include <string>
#include <stream.h>
#include <stdlib.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <pthread.h>
#include <plpintl.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"

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <getopt.h>

using namespace std;

static bool verbose = false;
static bool active = true;
static bool autoexit = false;

static ncp *theNCP = NULL;
static IOWatch iow;
static IOWatch accept_iow;
static ppsocket skt;
static int numScp = 0;
static socketChan *scp[257]; // MAX_CHANNELS_PSION + 1


logbuf ilog(LOG_INFO, STDOUT_FILENO);
logbuf dlog(LOG_DEBUG, STDOUT_FILENO);
logbuf elog(LOG_ERR, STDERR_FILENO);
ostream linf(&ilog);
ostream lout(&dlog);
ostream lerr(&elog);

static RETSIGTYPE
term_handler(int)
{
    linf << _("Got SIGTERM") << endl;
    signal(SIGTERM, term_handler);
    active = false;
};

static RETSIGTYPE
int_handler(int)
{
    linf << _("Got SIGINT") << endl;
    signal(SIGINT, int_handler);
    active = false;
};

void
checkForNewSocketConnection()
{
    string peer;
    if (accept_iow.watch(5,0) <= 0) {
	return;
    }
    ppsocket *next = skt.accept(&peer, &iow);
    if (next != NULL) {
	next->setWatch(&iow);
	// New connect
	if (verbose)
	    lout << "New socket connection from " << peer << endl;
	if ((numScp >= theNCP->maxLinks()) || (!theNCP->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);
	    delete next;
	    if (verbose)
		lout << "rejected" << endl;
	} else
	    scp[numScp++] = new socketChan(next, theNCP);
    }
}

void *
pollSocketConnections(void *)
{
    while (active) {
        iow.watch(0, 10000);
        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--;
	    }
        }
    }
    return NULL;
}

static void
help()
{
    cout << _(
	"Usage: ncpd [OPTIONS]...\n"
	"\n"
	"Supported options:\n"
	"\n"
        " -d, --dontfork          Run in foreground don't fork\n"
	" -h, --help              Display this text.\n"
	" -V, --version           Print version and exit.\n"
	" -e, --autoexit          Exit after device is disconnected.\n"
	" -v, --verbose=LOGCLASS  Enable logging of LOGCLASS events\n"
	"                         Valid log classes are:\n"
	"                           m   - main program\n"
	"                           nl  - NCP protocol log\n"
	"                           nd  - NCP protocol data dump\n"
	"                           ll  - PLP protocol log\n"
	"                           ld  - PLP protocol data dump\n"
	"                           pl  - physical I/O log\n"
	"                           ph  - physical I/O handshake\n"
	"                           pd  - physical I/O data dump\n"
	"                           all - All of the above\n"
	" -s, --serial=DEV        Use serial device DEV.\n"
	" -b, --baudrate=RATE     Set serial speed to BAUD.\n"
	);
    cout <<
#if DSPEED > 0
#define SPEEDSTR(x) #x
	_("                         Default: ") << DSPEED << ".\n";
#else
    _("                         Default: Autocycle 115.2k, 57.6k 38.4k, 19.2k\n");
#endif
    cout << _(
	" -p, --port=[HOST:]PORT  Listen on host HOST, port PORT.\n"
	"                         Default for HOST: 127.0.0.1\n"
	"                         Default for PORT: "
	) << DPORT << "\n\n";
}

static void
usage() {
    cerr << _("Try `ncpd --help' for more information") << endl;
}

static struct option opts[] = {
    {"dontfork",   no_argument,       0, 'd'},
    {"autoexit",   no_argument,       0, 'e'},
    {"help",       no_argument,       0, 'h'},
    {"version",    no_argument,       0, 'V'},
    {"verbose",    required_argument, 0, 'v'},
    {"port",       required_argument, 0, 'p'},
    {"serial",     required_argument, 0, 's'},
    {"baudrate",   required_argument, 0, 'b'},
    {NULL,         0,                 0,  0 }
};

static void
parse_destination(const char *arg, const char **host, int *port)
{
    if (!arg)
	return;
    // We don't want to modify argv, therefore copy it first ...
    char *argcpy = strdup(arg);
    char *pp = strchr(argcpy, ':');

    if (pp) {
	// host.domain:400
	// 10.0.0.1:400
	*pp ++= '\0';
	*host = argcpy;
    } else {
	// 400
	// host.domain
	// host
	// 10.0.0.1
	if (strchr(argcpy, '.') || !isdigit(argcpy[0])) {
	    *host = argcpy;
	    pp = 0L;
	} else
	    pp = argcpy;
    }
    if (pp)
	*port = atoi(pp);
}

static void *
link_thread(void *arg)
{
    while (active) {
        // psion
        iow.watch(1, 0);
        if (theNCP->hasFailed()) {
            if (autoexit) {
		active = false;
                break;
	    }
            iow.watch(5, 0);
            if (verbose)
                lout << "ncp: restarting\n";
            theNCP->reset();
        }
    }
    return NULL;
}

int
main(int argc, char **argv)
{
    int pid;
    bool dofork = true;

    int sockNum = DPORT;
    int baudRate = DSPEED;
    const char *host = "127.0.0.1";
    const char *serialDevice = NULL;
    unsigned short nverbose = 0;

    struct servent *se = getservbyname("psion", "tcp");
    dlog.setOn(false);
    elog.setOn(false);
    endservent();
    if (se != 0L)
	sockNum = ntohs(se->s_port);

    while (1) {
	int c = getopt_long(argc, argv, "hdeVb:s:p:v:", opts, NULL);
	if (c == -1)
	    break;
	switch (c) {
	    case '?':
		usage();
		return -1;
	    case 'V':
		cout << _("ncpd Version ") << VERSION << endl;
		return 0;
	    case 'h':
		help();
		return 0;
	    case 'v':
		if (!strcmp(optarg, "nl"))
		    nverbose |= NCP_DEBUG_LOG;
		if (!strcmp(optarg, "nd"))
		    nverbose |= NCP_DEBUG_DUMP;
		if (!strcmp(optarg, "ll"))
		    nverbose |= LNK_DEBUG_LOG;
		if (!strcmp(optarg, "ld"))
		    nverbose |= LNK_DEBUG_DUMP;
		if (!strcmp(optarg, "pl"))
		    nverbose |= PKT_DEBUG_LOG;
		if (!strcmp(optarg, "pd"))
		    nverbose |= PKT_DEBUG_DUMP;
		if (!strcmp(optarg, "ph"))
		    nverbose |= PKT_DEBUG_HANDSHAKE;
		if (!strcmp(optarg, "m"))
		    verbose = true;
		if (!strcmp(optarg, "all")) {
		    nverbose = NCP_DEBUG_LOG | NCP_DEBUG_DUMP |
			LNK_DEBUG_LOG | LNK_DEBUG_DUMP |
			PKT_DEBUG_LOG | PKT_DEBUG_DUMP | PKT_DEBUG_HANDSHAKE;
		    verbose = true;
		}
		break;
	    case 'd':
		dofork = 0;
		break;
	    case 'e':
		autoexit = true;
		break;
	    case 'b':
		if (!strcmp(optarg, "auto"))
		    baudRate = -1;
		else
		    baudRate = atoi(optarg);
		break;
	    case 's':
		serialDevice = optarg;
		break;
	    case 'p':
		parse_destination(optarg, &host, &sockNum);
		break;
	}
    }
    if (optind < argc) {
	usage();
	return -1;
    }

    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(&accept_iow);
	    if (!skt.listen(host, sockNum))
		cerr << "listen on " << host << ":" << sockNum << ": "
		     << strerror(errno) << endl;
	    else {
		if (dofork || autoexit) {
		    openlog("ncpd", LOG_CONS|LOG_PID, LOG_DAEMON);
		    dlog.setOn(true);
		    elog.setOn(true);
		    ilog.setOn(true);
		    linf << _("daemon started. Listening at ") << host << ":"
			 << sockNum << _(" using device ") << serialDevice
			 << endl;
		    setsid();
		    chdir("/");
		    int devnull =
			open("/dev/null", O_RDWR, 0);
		    if (devnull != -1) {
			dup2(devnull, STDIN_FILENO);
			dup2(devnull, STDOUT_FILENO);
			dup2(devnull, STDERR_FILENO);
			if (devnull > 2)
			    close(devnull);
		    }
		}
		memset(scp, 0, sizeof(scp));
		theNCP = new ncp(serialDevice, baudRate, nverbose);
		if (!theNCP) {
		    lerr << "Could not create NCP object" << endl;
		    exit(-1);
		}
		pthread_t thr_a, thr_b;
		if (pthread_create(&thr_a, NULL, link_thread, NULL) != 0) {
		    lerr << "Could not create Link thread" << endl;
		    exit(-1);
		}
		if (pthread_create(&thr_a, NULL,
				   pollSocketConnections, NULL) != 0) {
		    lerr << "Could not create Socket thread" << endl;
		    exit(-1);
		}
		while (active)
		    checkForNewSocketConnection();
		linf << _("terminating") << endl;
		void *ret;
		pthread_join(thr_a, &ret);
		pthread_join(thr_b, &ret);
		delete theNCP;
	    }
	    skt.closeSocket();
	    break;
	case -1:
	    lerr << "fork: " << strerror(errno) << endl;
	    break;
	default:
	    exit(0);
    }
}

/*
 * Local variables:
 * c-basic-offset: 4
 * End:
 */