hmland: don't impersonate HM-CFG-LAN by default.
[hmcfgusb] / hmland.c
1 /* HM-CFG-LAN emulation for HM-CFG-USB
2 *
3 * Copyright (c) 2013-15 Michael Gernoth <michael@gernoth.net>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to
7 * deal in the Software without restriction, including without limitation the
8 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
9 * sell copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <unistd.h>
27 #include <stdint.h>
28 #include <stdarg.h>
29 #include <string.h>
30 #include <strings.h>
31 #include <poll.h>
32 #include <signal.h>
33 #include <errno.h>
34 #include <sys/types.h>
35 #include <sys/socket.h>
36 #include <sys/stat.h>
37 #include <fcntl.h>
38 #include <time.h>
39 #include <netinet/in.h>
40 #include <arpa/inet.h>
41 #include <libusb-1.0/libusb.h>
42
43 #include "version.h"
44 #include "hexdump.h"
45 #include "hmcfgusb.h"
46
47 #define PID_FILE "/var/run/hmland.pid"
48
49 #define DEFAULT_REBOOT_SECONDS 86400
50 #define LAN_READ_CHUNK_SIZE 2048
51 /* Don't allow remote clients to consume all of our memory */
52 #define LAN_MAX_LINE_LENGTH 4096
53 #define LAN_MAX_BUF_LENGTH 1048576
54
55 extern char *optarg;
56
57 static int impersonate_hmlanif = 0;
58 static int debug = 0;
59 static int verbose = 0;
60 static FILE *logfile = NULL;
61 static int reboot_seconds = 0;
62 static int reboot_at_hour = -1;
63 static int reboot_at_minute = -1;
64 static int reboot_set = 0;
65 static uint8_t *lan_read_buf = NULL;
66 static int lan_read_buflen = 0;
67
68 struct queued_rx {
69 char *rx;
70 int len;
71 struct queued_rx *next;
72 };
73
74 static struct queued_rx *qrx = NULL;
75 static int wait_for_h = 0;
76
77 #define FLAG_LENGTH_BYTE (1<<0)
78 #define FLAG_FORMAT_HEX (1<<1)
79 #define FLAG_COMMA_BEFORE (1<<2)
80 #define FLAG_COMMA_AFTER (1<<3)
81 #define FLAG_NL (1<<4)
82 #define FLAG_IGNORE_COMMAS (1<<5)
83
84 #define CHECK_SPACE(x) if ((*outpos + x) > outend) { fprintf(stderr, "Not enough space!\n"); return 0; }
85 #define CHECK_AVAIL(x) if ((*inpos + x) > inend) { fprintf(stderr, "Not enough input available!\n"); return 0; }
86
87 static void print_timestamp(FILE *f)
88 {
89 struct timeval tv;
90 struct tm *tmp;
91 char ts[32];
92
93 gettimeofday(&tv, NULL);
94 tmp = localtime(&tv.tv_sec);
95 memset(ts, 0, sizeof(ts));
96 strftime(ts, sizeof(ts)-1, "%Y-%m-%d %H:%M:%S", tmp);
97 fprintf(f, "%s.%06ld: ", ts, tv.tv_usec);
98 }
99
100 static void write_log(char *buf, int len, char *fmt, ...)
101 {
102 va_list ap;
103 int i;
104
105 if ((!logfile) && (!verbose))
106 return;
107
108 if (logfile)
109 print_timestamp(logfile);
110 if (verbose)
111 print_timestamp(stdout);
112
113 if (fmt) {
114 if (logfile) {
115 va_start(ap, fmt);
116 vfprintf(logfile, fmt, ap);
117 va_end(ap);
118 }
119 if (verbose) {
120 va_start(ap, fmt);
121 vprintf(fmt, ap);
122 va_end(ap);
123 }
124 }
125
126 if (buf && len) {
127 for (i = 0; i < len; i++) {
128 if (logfile)
129 fprintf(logfile, "%c", buf[i]);
130 if (verbose)
131 printf("%c", buf[i]);
132 }
133 if (logfile)
134 fprintf(logfile, "\n");
135 if (verbose)
136 printf("\n");
137 }
138 if (logfile)
139 fflush(logfile);
140 }
141
142 static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int len, int flags)
143 {
144 const uint8_t nibble[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
145 'A', 'B', 'C', 'D', 'E', 'F'};
146 uint8_t *buf_out = *outpos;
147 uint8_t *outend = *outpos + outlen;
148 uint8_t *inend = *inpos + inlen;
149 int i;
150
151 if (flags & FLAG_COMMA_BEFORE) {
152 CHECK_SPACE(1);
153 **outpos=',';
154 *outpos += 1;
155 }
156
157 if (flags & FLAG_LENGTH_BYTE) {
158 CHECK_AVAIL(1);
159 len = **inpos;
160 *inpos += 1;
161 }
162
163 if (flags & FLAG_FORMAT_HEX) {
164 CHECK_AVAIL(len);
165 CHECK_SPACE(len*2);
166 for (i = 0; i < len; i++) {
167 **outpos = nibble[((**inpos) & 0xf0) >> 4];
168 *outpos += 1;
169 **outpos = nibble[((**inpos) & 0xf)];
170 *inpos += 1; *outpos += 1;
171 }
172 } else {
173 CHECK_AVAIL(len);
174 CHECK_SPACE(len);
175 memcpy(*outpos, *inpos, len);
176 *outpos += len;
177 *inpos += len;
178 }
179
180 if (flags & FLAG_COMMA_AFTER) {
181 CHECK_SPACE(1);
182 **outpos=',';
183 *outpos += 1;
184 }
185
186 if (flags & FLAG_NL) {
187 CHECK_SPACE(2);
188 **outpos='\r';
189 *outpos += 1;
190 **outpos='\n';
191 *outpos += 1;
192 }
193
194 return *outpos - buf_out;
195 }
196
197 static uint8_t ascii_to_nibble(uint8_t a)
198 {
199 uint8_t c = 0x00;
200
201 if ((a >= '0') && (a <= '9')) {
202 c = a - '0';
203 } else if ((a >= 'A') && (a <= 'F')) {
204 c = (a - 'A') + 10;
205 } else if ((a >= 'a') && (a <= 'f')) {
206 c = (a - 'a') + 10;
207 }
208
209 return c;
210 }
211
212 static int parse_part_in(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int flags)
213 {
214 uint8_t *buf_out = *outpos;
215 uint8_t *outend = *outpos + outlen;
216 uint8_t *inend = *inpos + inlen;
217
218 if (flags & FLAG_LENGTH_BYTE) {
219 int len = 0;
220 uint8_t *ip;
221
222 ip = *inpos;
223 while(ip < inend) {
224 if (*ip == ',') {
225 ip++;
226 if (!(flags & FLAG_IGNORE_COMMAS))
227 break;
228
229 continue;
230 }
231 len++;
232 ip++;
233 }
234 CHECK_SPACE(1);
235 **outpos = (len / 2);
236 *outpos += 1;
237 }
238
239 while(*inpos < inend) {
240 if (**inpos == ',') {
241 *inpos += 1;
242 if (!(flags & FLAG_IGNORE_COMMAS))
243 break;
244
245 continue;
246 }
247
248 CHECK_SPACE(1);
249 CHECK_AVAIL(2);
250
251 **outpos = ascii_to_nibble(**inpos) << 4;
252 *inpos += 1;
253 **outpos |= ascii_to_nibble(**inpos);
254 *inpos += 1; *outpos += 1;
255 }
256
257 return *outpos - buf_out;
258 }
259
260 static int hmlan_format_out(uint8_t *buf, int buf_len, void *data)
261 {
262 uint8_t out[1024];
263 uint8_t *outpos;
264 uint8_t *inpos;
265 uint16_t version;
266 int fd = *((int*)data);
267 int w;
268
269 if (buf_len < 1)
270 return 1;
271
272 memset(out, 0, sizeof(out));
273 outpos = out;
274 inpos = buf;
275
276 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
277 switch(buf[0]) {
278 case 'H':
279 if (impersonate_hmlanif) {
280 buf[5] = 'L';
281 buf[6] = 'A';
282 buf[7] = 'N';
283 }
284 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE);
285 version = inpos[0] << 8;
286 version |= inpos[1];
287 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
288 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE);
289 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
290 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
291 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
292 if (version < 0x03c7) {
293 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
294 } else {
295 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
296 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
297 }
298
299 if (!reboot_set) {
300 int new_reboot_seconds;
301
302 if (version < 0x03c7) {
303 new_reboot_seconds = DEFAULT_REBOOT_SECONDS;
304 } else {
305 new_reboot_seconds = 0;
306 }
307
308 if (verbose && new_reboot_seconds && (reboot_seconds != new_reboot_seconds))
309 printf("Rebooting in %u seconds due to old firmware (0.%d)\n",
310 new_reboot_seconds, version);
311
312 reboot_seconds = new_reboot_seconds;
313 }
314
315 break;
316 case 'E':
317 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
318 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
319 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
320 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
321 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
322 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE | FLAG_NL);
323
324 break;
325 case 'R':
326 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
327 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
328 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
329 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
330 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
331 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE | FLAG_NL);
332
333 break;
334 case 'I':
335 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
336 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
337 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
338 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
339
340 break;
341 case 'G':
342 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_NL);
343
344 break;
345 default:
346 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX | FLAG_NL);
347 hexdump(buf, buf_len, "Unknown> ");
348 break;
349 }
350
351 /* Queue packet until first respone to 'K' is received */
352 if (wait_for_h && buf[0] != 'H') {
353 struct queued_rx **rxp = &qrx;
354
355 while (*rxp)
356 rxp = &((*rxp)->next);
357
358 *rxp = malloc(sizeof(struct queued_rx));
359 if (!*rxp) {
360 perror("malloc");
361 return 0;
362 }
363
364 memset(*rxp, 0, sizeof(struct queued_rx));
365 (*rxp)->len = outpos-out;
366 (*rxp)->rx = malloc((*rxp)->len);
367 if (!(*rxp)->rx) {
368 perror("malloc");
369 return 0;
370 }
371 memset((*rxp)->rx, 0, (*rxp)->len);
372 memcpy((*rxp)->rx, out, (*rxp)->len);
373
374 return 1;
375 }
376
377 write_log((char*)out, outpos-out-2, "LAN < ");
378
379 w = write(fd, out, outpos-out);
380 if (w <= 0) {
381 perror("write");
382 return 0;
383 }
384
385 /* Send all queued packets */
386 if (wait_for_h) {
387 struct queued_rx *curr_rx = qrx;
388 struct queued_rx *last_rx;
389
390 while (curr_rx) {
391 write_log(curr_rx->rx, curr_rx->len-2, "LAN < ");
392
393 w = write(fd, curr_rx->rx, curr_rx->len);
394 if (w <= 0) {
395 perror("write");
396 }
397 last_rx = curr_rx;
398 curr_rx = curr_rx->next;
399
400 free(last_rx->rx);
401 free(last_rx);
402 }
403
404 qrx = NULL;
405
406 wait_for_h = 0;
407 }
408
409 return 1;
410 }
411
412 static int hmlan_parse_one(uint8_t *cmd, int last, void *data)
413 {
414 struct hmcfgusb_dev *dev = data;
415 uint8_t out[0x40]; //FIXME!!!
416 uint8_t *outpos;
417 uint8_t *inpos = cmd;
418
419 outpos = out;
420
421 if (last == 0)
422 return 1;
423
424 write_log((char*)cmd, last, "LAN > ");
425
426 memset(out, 0, sizeof(out));
427 *outpos++ = *inpos++;
428
429 switch(*cmd) {
430 case 'S':
431 parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
432 parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
433 parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
434 parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
435 parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
436 parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
437 break;
438 case 'Y':
439 parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
440 parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
441 parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
442 break;
443 default:
444 parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
445 break;
446 }
447
448 hmcfgusb_send(dev, out, sizeof(out), 1);
449
450 return 1;
451 }
452
453 static int hmlan_parse_in(int fd, void *data)
454 {
455 uint8_t *newbuf;
456 int r;
457 int i;
458
459 newbuf = realloc(lan_read_buf, lan_read_buflen + LAN_READ_CHUNK_SIZE);
460 if (!newbuf) {
461 perror("realloc");
462 return 0;
463 }
464 lan_read_buf = newbuf;
465 r = read(fd, lan_read_buf + lan_read_buflen, LAN_READ_CHUNK_SIZE);
466 if (r > 0) {
467 lan_read_buflen += r;
468 if (lan_read_buflen > LAN_MAX_BUF_LENGTH) {
469 if (verbose)
470 printf("Our buffer is bigger than %d bytes (%d bytes), closing connection!\n", LAN_MAX_BUF_LENGTH, lan_read_buflen);
471 return -1;
472 }
473 while(lan_read_buflen > 0) {
474 int found = 0;
475
476 for (i = 0; i < lan_read_buflen; i++) {
477 if ((lan_read_buf[i] == '\r') || (lan_read_buf[i] == '\n')) {
478 if (i > 0)
479 hmlan_parse_one(lan_read_buf, i, data);
480 memmove(lan_read_buf, lan_read_buf + i + 1, lan_read_buflen - (i + 1));
481 lan_read_buflen -= (i + 1);
482 found = 1;
483 break;
484 }
485 if (i > LAN_MAX_LINE_LENGTH) {
486 if (verbose)
487 printf("Client sent more than %d bytes without newline, closing connection!\n", LAN_MAX_LINE_LENGTH);
488 return -1;
489 }
490 }
491 if (!found)
492 break;
493 newbuf = realloc(lan_read_buf, lan_read_buflen);
494 if (lan_read_buflen && !newbuf) {
495 perror("realloc");
496 return 0;
497 }
498 lan_read_buf = newbuf;
499 }
500 } else if (r < 0) {
501 if (errno != ECONNRESET)
502 perror("read");
503 return r;
504 } else {
505 return 0;
506 }
507
508 return 1;
509 }
510
511 static int comm(int fd_in, int fd_out, int master_socket, int flags)
512 {
513 struct hmcfgusb_dev *dev;
514 uint8_t out[0x40]; //FIXME!!!
515 int quit = 0;
516
517 hmcfgusb_set_debug(debug);
518
519 dev = hmcfgusb_init(hmlan_format_out, &fd_out);
520 if (!dev) {
521 fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
522 return 0;
523 }
524
525 if (dev->bootloader) {
526 if (verbose)
527 printf("HM-CFG-USB in bootloader mode, restarting in normal mode...\n");
528
529 hmcfgusb_leave_bootloader(dev);
530
531 hmcfgusb_close(dev);
532 sleep(1);
533 return 0;
534 }
535
536 if ((reboot_at_hour != -1) && (reboot_at_minute != -1)) {
537 struct tm *tm_s;
538 time_t tm;
539
540 tm = time(NULL);
541 tm_s = localtime(&tm);
542 if (tm_s == NULL) {
543 perror("localtime");
544 return 0;
545 }
546
547 tm_s->tm_hour = reboot_at_hour;
548 tm_s->tm_min = reboot_at_minute;
549 tm_s->tm_sec = 0;
550
551 tm = mktime(tm_s);
552 reboot_seconds = tm - dev->opened_at;
553
554 while (reboot_seconds <= 0)
555 reboot_seconds += 86400;
556 }
557
558 if (verbose && reboot_seconds)
559 printf("Rebooting in %u seconds\n", reboot_seconds);
560
561
562 if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
563 fprintf(stderr, "Can't add client to pollfd!\n");
564 hmcfgusb_close(dev);
565 return 0;
566 }
567
568 if (master_socket >= 0) {
569 if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
570 fprintf(stderr, "Can't add master_socket to pollfd!\n");
571 hmcfgusb_close(dev);
572 return 0;
573 }
574 }
575
576 memset(out, 0, sizeof(out));
577 out[0] = 'K';
578 wait_for_h = 1;
579 hmcfgusb_send_null_frame(dev, 1);
580 hmcfgusb_send(dev, out, sizeof(out), 1);
581
582 while(!quit) {
583 int fd;
584
585 fd = hmcfgusb_poll(dev, 1000); /* Wakeup device/bus at least once a second */
586 if (fd >= 0) {
587 if (fd == master_socket) {
588 int client;
589
590 client = accept(master_socket, NULL, 0);
591 if (client >= 0) {
592 shutdown(client, SHUT_RDWR);
593 close(client);
594 }
595 } else {
596 if (hmlan_parse_in(fd, dev) <= 0) {
597 quit = 1;
598 }
599 }
600 } else if (fd == -1) {
601 if (errno) {
602 if (errno != ETIMEDOUT) {
603 perror("hmcfgusb_poll");
604 quit = 1;
605 } else {
606 /* periodically wakeup the device */
607 hmcfgusb_send_null_frame(dev, 1);
608 if (wait_for_h) {
609 memset(out, 0, sizeof(out));
610 out[0] = 'K';
611 hmcfgusb_send(dev, out, sizeof(out), 1);
612 }
613 }
614 }
615 }
616
617 if (reboot_seconds && ((dev->opened_at + reboot_seconds) <= time(NULL))) {
618 if (verbose) {
619 printf("HM-CFG-USB running since %lu seconds, rebooting now...\n",
620 time(NULL) - dev->opened_at);
621 }
622 hmcfgusb_enter_bootloader(dev);
623 }
624 }
625
626 hmcfgusb_close(dev);
627 return 1;
628 }
629
630 void sigterm_handler(int sig)
631 {
632 if (unlink(PID_FILE) == -1)
633 perror("Can't remove PID file");
634
635 exit(EXIT_SUCCESS);
636 }
637
638 #define FLAG_DAEMON (1 << 0)
639 #define FLAG_PID_FILE (1 << 1)
640
641 static int socket_server(char *iface, int port, int flags)
642 {
643 struct sigaction sact;
644 struct sockaddr_in sin;
645 int sock;
646 int n;
647 pid_t pid;
648
649 if (flags & FLAG_DAEMON) {
650 FILE *pidfile = NULL;
651
652 if (flags & FLAG_PID_FILE) {
653 int fd;
654
655 fd = open(PID_FILE, O_CREAT | O_EXCL | O_WRONLY, 0644);
656 if (fd == -1) {
657 if (errno == EEXIST) {
658 pid_t old_pid;
659 pidfile = fopen(PID_FILE, "r");
660 if (!pidfile) {
661 perror("PID file " PID_FILE " already exists, already running?");
662 exit(EXIT_FAILURE);
663 }
664
665 if (fscanf(pidfile, "%u", &old_pid) != 1) {
666 fclose(pidfile);
667 fprintf(stderr, "Can't read old PID from " PID_FILE ", already running?\n");
668 exit(EXIT_FAILURE);
669 }
670
671 fclose(pidfile);
672
673 fprintf(stderr, "Already running with PID %u according to " PID_FILE "!\n", old_pid);
674 exit(EXIT_FAILURE);
675 }
676 perror("Can't create PID file " PID_FILE);
677 exit(EXIT_FAILURE);
678 }
679
680 pidfile = fdopen(fd, "w");
681 if (!pidfile) {
682 perror("Can't reopen PID file fd");
683 exit(EXIT_FAILURE);
684 }
685
686 memset(&sact, 0, sizeof(sact));
687 sact.sa_handler = sigterm_handler;
688
689 if (sigaction(SIGTERM, &sact, NULL) == -1) {
690 perror("sigaction(SIGTERM)");
691 exit(EXIT_FAILURE);
692 }
693 }
694
695 pid = fork();
696 if (pid > 0) {
697 if (pidfile) {
698 fprintf(pidfile, "%u\n", pid);
699 fclose(pidfile);
700 }
701
702 printf("Daemon with PID %u started!\n", pid);
703 exit(EXIT_SUCCESS);
704 } else if (pid < 0) {
705 perror("fork");
706 exit(EXIT_FAILURE);
707 }
708
709 if (pidfile)
710 fclose(pidfile);
711 }
712
713 memset(&sact, 0, sizeof(sact));
714 sact.sa_handler = SIG_IGN;
715
716 if (sigaction(SIGPIPE, &sact, NULL) == -1) {
717 perror("sigaction(SIGPIPE)");
718 exit(EXIT_FAILURE);
719 }
720
721 sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
722 if (sock == -1) {
723 perror("Can't open socket");
724 return EXIT_FAILURE;
725 }
726
727 n = 1;
728 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
729 perror("Can't set socket options");
730 return EXIT_FAILURE;
731 }
732
733 memset(&sin, 0, sizeof(sin));
734 sin.sin_family = AF_INET;
735 sin.sin_port = htons(port);
736 if (!iface) {
737 sin.sin_addr.s_addr = htonl(INADDR_ANY);
738 } else {
739 if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) {
740 fprintf(stderr, "Can't convert IP %s, aborting!\n", iface);
741 return EXIT_FAILURE;
742 }
743 }
744
745 if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
746 perror("Can't bind socket");
747 return EXIT_FAILURE;
748 }
749
750 if (listen(sock, 1) == -1) {
751 perror("Can't listen on socket");
752 return EXIT_FAILURE;
753 }
754
755 while(1) {
756 struct sockaddr_in csin;
757 socklen_t csinlen;
758 int client;
759 in_addr_t client_addr;
760
761 memset(&csin, 0, sizeof(csin));
762 csinlen = sizeof(csin);
763 client = accept(sock, (struct sockaddr*)&csin, &csinlen);
764 if (client == -1) {
765 perror("Couldn't accept client");
766 continue;
767 }
768
769 /* FIXME: getnameinfo... */
770 client_addr = ntohl(csin.sin_addr.s_addr);
771
772 write_log(NULL, 0, "Client %d.%d.%d.%d connected!\n",
773 (client_addr & 0xff000000) >> 24,
774 (client_addr & 0x00ff0000) >> 16,
775 (client_addr & 0x0000ff00) >> 8,
776 (client_addr & 0x000000ff));
777
778 comm(client, client, sock, flags);
779
780 shutdown(client, SHUT_RDWR);
781 close(client);
782
783 if (lan_read_buf)
784 free(lan_read_buf);
785 lan_read_buf = NULL;
786 lan_read_buflen = 0;
787
788 write_log(NULL, 0, "Connection to %d.%d.%d.%d closed!\n",
789 (client_addr & 0xff000000) >> 24,
790 (client_addr & 0x00ff0000) >> 16,
791 (client_addr & 0x0000ff00) >> 8,
792 (client_addr & 0x000000ff));
793 sleep(1);
794 }
795
796 return EXIT_SUCCESS;
797 }
798
799 static int interactive_server(int flags)
800 {
801 if (!comm(STDIN_FILENO, STDOUT_FILENO, -1, flags))
802 return EXIT_FAILURE;
803
804 return EXIT_SUCCESS;
805 }
806
807 void hmlan_syntax(char *prog)
808 {
809 fprintf(stderr, "Syntax: %s options\n\n", prog);
810 fprintf(stderr, "Possible options:\n");
811 fprintf(stderr, "\t-D\t\tdebug mode\n");
812 fprintf(stderr, "\t-d\t\tdaemon mode\n");
813 fprintf(stderr, "\t-h\t\tthis help\n");
814 fprintf(stderr, "\t-I\t\tpretend to be HM-LAN-IF for compatibility with client-software (previous default)\n");
815 fprintf(stderr, "\t-i\t\tinteractive mode (connect HM-CFG-USB to terminal)\n");
816 fprintf(stderr, "\t-l ip\t\tlisten on given IP address only (for example 127.0.0.1)\n");
817 fprintf(stderr, "\t-L logfile\tlog network-communication to logfile\n");
818 fprintf(stderr, "\t-P\t\tcreate PID file " PID_FILE " in daemon mode\n");
819 fprintf(stderr, "\t-p n\t\tlisten on port n (default: 1000)\n");
820 fprintf(stderr, "\t-r n\t\treboot HM-CFG-USB after n seconds (0: no reboot, default: %u if FW < 0.967, 0 otherwise)\n", DEFAULT_REBOOT_SECONDS);
821 fprintf(stderr, "\t hh:mm\treboot HM-CFG-USB daily at hh:mm\n");
822 fprintf(stderr, "\t-v\t\tverbose mode\n");
823 fprintf(stderr, "\t-V\t\tshow version (" VERSION ")\n");
824
825 }
826
827 int main(int argc, char **argv)
828 {
829 int port = 1000;
830 char *iface = NULL;
831 int interactive = 0;
832 int flags = 0;
833 char *ep;
834 int opt;
835
836 while((opt = getopt(argc, argv, "DdhIiPp:Rr:l:L:vV")) != -1) {
837 switch (opt) {
838 case 'D':
839 debug = 1;
840 verbose = 1;
841 break;
842 case 'd':
843 flags |= FLAG_DAEMON;
844 break;
845 case 'I':
846 impersonate_hmlanif = 1;
847 break;
848 case 'i':
849 interactive = 1;
850 break;
851 case 'P':
852 flags |= FLAG_PID_FILE;
853 break;
854 case 'p':
855 port = strtoul(optarg, &ep, 10);
856 if (*ep != '\0') {
857 fprintf(stderr, "Can't parse port!\n");
858 exit(EXIT_FAILURE);
859 }
860 break;
861 case 'R':
862 fprintf(stderr, "-R is no longer needed (1s wakeup is default)\n");
863 break;
864 case 'r':
865 reboot_seconds = strtoul(optarg, &ep, 10);
866 if (*ep != '\0') {
867 if (*ep == ':') {
868 reboot_at_hour = reboot_seconds;
869 ep++;
870 reboot_at_minute = strtoul(ep, &ep, 10);
871 if (*ep != '\0') {
872 fprintf(stderr, "Can't parse reboot-time!\n");
873 exit(EXIT_FAILURE);
874 }
875
876 reboot_seconds = 0;
877 } else {
878 fprintf(stderr, "Can't parse reboot-timeout!\n");
879 exit(EXIT_FAILURE);
880 }
881 }
882 reboot_set = 1;
883 break;
884 case 'l':
885 iface = optarg;
886 break;
887 case 'L':
888 logfile = fopen(optarg, "a");
889 if (!logfile) {
890 perror("fopen(logfile)");
891 exit(EXIT_FAILURE);
892 }
893 break;
894 case 'v':
895 verbose = 1;
896 break;
897 case 'V':
898 printf("hmland " VERSION "\n");
899 printf("Copyright (c) 2013-15 Michael Gernoth\n\n");
900 exit(EXIT_SUCCESS);
901 case 'h':
902 case ':':
903 case '?':
904 default:
905 hmlan_syntax(argv[0]);
906 exit(EXIT_FAILURE);
907 break;
908 }
909 }
910
911 if (interactive) {
912 return interactive_server(flags);
913 } else {
914 return socket_server(iface, port, flags);
915 }
916 }
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