git.zerfleddert.de Git - hmcfgusb/blob - 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                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 293                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 294
 295                         if (!reboot_set) {
 296                                 int new_reboot_seconds;
 297
 298                                 if (version < 0x03c7) {
 299                                         new_reboot_seconds = DEFAULT_REBOOT_SECONDS;
 300                                 } else {
 301                                         new_reboot_seconds = 0;
 302                                 }
 303
 304                                 if (verbose && new_reboot_seconds && (reboot_seconds != new_reboot_seconds))
 305                                         printf("Rebooting in %u seconds due to old firmware (0.%d)\n",
 306                                                 new_reboot_seconds, version);
 307
 308                                 reboot_seconds = new_reboot_seconds;
 309                         }
 310
 311                         break;
 312                 case 'E':
 313                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
 314                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 315                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 316                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 317                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 318                         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);
 319
 320                         break;
 321                 case 'R':
 322                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
 323                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 324                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 325                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 326                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 327                         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);
 328
 329                         break;
 330                 case 'I':
 331                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
 332                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 333                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 334                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 335
 336                         break;
 337                 case 'G':
 338                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_NL);
 339
 340                         break;
 341                 default:
 342                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX | FLAG_NL);
 343                         hexdump(buf, buf_len, "Unknown> ");
 344                         break;
 345         }
 346
 347         /* Queue packet until first respone to 'K' is received */
 348         if (wait_for_h && buf[0] != 'H') {
 349                 struct queued_rx **rxp = &qrx;
 350
 351                 while (*rxp)
 352                         rxp = &((*rxp)->next);
 353
 354                 *rxp = malloc(sizeof(struct queued_rx));
 355                 if (!*rxp) {
 356                         perror("malloc");
 357                         return 0;
 358                 }
 359
 360                 memset(*rxp, 0, sizeof(struct queued_rx));
 361                 (*rxp)->len = outpos-out;
 362                 (*rxp)->rx = malloc((*rxp)->len);
 363                 if (!(*rxp)->rx) {
 364                         perror("malloc");
 365                         return 0;
 366                 }
 367                 memset((*rxp)->rx, 0, (*rxp)->len);
 368                 memcpy((*rxp)->rx, out, (*rxp)->len);
 369
 370                 return 1;
 371         }
 372
 373         write_log((char*)out, outpos-out-2, "LAN < ");
 374
 375         w = write(fd, out, outpos-out);
 376         if (w <= 0) {
 377                 perror("write");
 378                 return 0;
 379         }
 380
 381         /* Send all queued packets */
 382         if (wait_for_h) {
 383                 struct queued_rx *curr_rx = qrx;
 384                 struct queued_rx *last_rx;
 385
 386                 while (curr_rx) {
 387                         write_log(curr_rx->rx, curr_rx->len-2, "LAN < ");
 388
 389                         w = write(fd, curr_rx->rx, curr_rx->len);
 390                         if (w <= 0) {
 391                                 perror("write");
 392                         }
 393                         last_rx = curr_rx;
 394                         curr_rx = curr_rx->next;
 395
 396                         free(last_rx->rx);
 397                         free(last_rx);
 398                 }
 399
 400                 qrx = NULL;
 401
 402                 wait_for_h = 0;
 403         }
 404
 405         return 1;
 406 }
 407
 408 static int hmlan_parse_one(uint8_t *cmd, int last, void *data)
 409 {
 410         struct hmcfgusb_dev *dev = data;
 411         uint8_t out[0x40]; //FIXME!!!
 412         uint8_t *outpos;
 413         uint8_t *inpos = cmd;
 414
 415         outpos = out;
 416
 417         if (last == 0)
 418                 return 1;
 419
 420         write_log((char*)cmd, last,  "LAN > ");
 421
 422         memset(out, 0, sizeof(out));
 423         *outpos++ = *inpos++;
 424
 425         switch(*cmd) {
 426                 case 'S':
 427                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
 428                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
 429                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
 430                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
 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)), FLAG_LENGTH_BYTE);
 433                         break;
 434                 case 'Y':
 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)), 0);
 437                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
 438                         break;
 439                 default:
 440                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
 441                         break;
 442         }
 443
 444         hmcfgusb_send(dev, out, sizeof(out), 1);
 445
 446         return 1;
 447 }
 448
 449 static int hmlan_parse_in(int fd, void *data)
 450 {
 451         uint8_t *newbuf;
 452         int r;
 453         int i;
 454
 455         newbuf = realloc(lan_read_buf, lan_read_buflen + LAN_READ_CHUNK_SIZE);
 456         if (!newbuf) {
 457                 perror("realloc");
 458                 return 0;
 459         }
 460         lan_read_buf = newbuf;
 461         r = read(fd, lan_read_buf + lan_read_buflen, LAN_READ_CHUNK_SIZE);
 462         if (r > 0) {
 463                 lan_read_buflen += r;
 464                 if (lan_read_buflen > LAN_MAX_BUF_LENGTH) {
 465                         if (verbose)
 466                                 printf("Our buffer is bigger than %d bytes (%d bytes), closing connection!\n", LAN_MAX_BUF_LENGTH, lan_read_buflen);
 467                         return -1;
 468                 }
 469                 while(lan_read_buflen > 0) {
 470                         int found = 0;
 471
 472                         for (i = 0; i < lan_read_buflen; i++) {
 473                                 if ((lan_read_buf[i] == '\r') || (lan_read_buf[i] == '\n')) {
 474                                         if (i > 0)
 475                                                 hmlan_parse_one(lan_read_buf, i, data);
 476                                         memmove(lan_read_buf, lan_read_buf + i + 1, lan_read_buflen - (i + 1));
 477                                         lan_read_buflen -= (i + 1);
 478                                         found = 1;
 479                                         break;
 480                                 }
 481                                 if (i > LAN_MAX_LINE_LENGTH) {
 482                                         if (verbose)
 483                                                 printf("Client sent more than %d bytes without newline, closing connection!\n", LAN_MAX_LINE_LENGTH);
 484                                         return -1;
 485                                 }
 486                         }
 487                         if (!found)
 488                                 break;
 489                         newbuf = realloc(lan_read_buf, lan_read_buflen);
 490                         if (lan_read_buflen && !newbuf) {
 491                                 perror("realloc");
 492                                 return 0;
 493                         }
 494                         lan_read_buf = newbuf;
 495                 }
 496         } else if (r < 0) {
 497                 if (errno != ECONNRESET)
 498                         perror("read");
 499                 return r;
 500         } else {
 501                 return 0;
 502         }
 503
 504         return 1;
 505 }
 506
 507 static int comm(int fd_in, int fd_out, int master_socket, int flags)
 508 {
 509         struct hmcfgusb_dev *dev;
 510         uint8_t out[0x40]; //FIXME!!!
 511         int quit = 0;
 512
 513         hmcfgusb_set_debug(debug);
 514
 515         dev = hmcfgusb_init(hmlan_format_out, &fd_out);
 516         if (!dev) {
 517                 fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
 518                 return 0;
 519         }
 520
 521         if (dev->bootloader) {
 522                 if (verbose)
 523                         printf("HM-CFG-USB in bootloader mode, restarting in normal mode...\n");
 524
 525                 hmcfgusb_leave_bootloader(dev);
 526
 527                 hmcfgusb_close(dev);
 528                 sleep(1);
 529                 return 0;
 530         }
 531
 532         if ((reboot_at_hour != -1) && (reboot_at_minute != -1)) {
 533                 struct tm *tm_s;
 534                 time_t tm;
 535
 536                 tm = time(NULL);
 537                 tm_s = localtime(&tm);
 538                 if (tm_s == NULL) {
 539                         perror("localtime");
 540                         return 0;
 541                 }
 542
 543                 tm_s->tm_hour = reboot_at_hour;
 544                 tm_s->tm_min = reboot_at_minute;
 545                 tm_s->tm_sec = 0;
 546
 547                 tm = mktime(tm_s);
 548                 reboot_seconds = tm - dev->opened_at;
 549
 550                 while (reboot_seconds <= 0)
 551                         reboot_seconds += 86400;
 552         }
 553
 554         if (verbose && reboot_seconds)
 555                 printf("Rebooting in %u seconds\n", reboot_seconds);
 556
 557
 558         if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
 559                 fprintf(stderr, "Can't add client to pollfd!\n");
 560                 hmcfgusb_close(dev);
 561                 return 0;
 562         }
 563
 564         if (master_socket >= 0) {
 565                 if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
 566                         fprintf(stderr, "Can't add master_socket to pollfd!\n");
 567                         hmcfgusb_close(dev);
 568                         return 0;
 569                 }
 570         }
 571
 572         memset(out, 0, sizeof(out));
 573         out[0] = 'K';
 574         wait_for_h = 1;
 575         hmcfgusb_send_null_frame(dev, 1);
 576         hmcfgusb_send(dev, out, sizeof(out), 1);
 577
 578         while(!quit) {
 579                 int fd;
 580
 581                 fd = hmcfgusb_poll(dev, 1000);  /* Wakeup device/bus at least once a second */
 582                 if (fd >= 0) {
 583                         if (fd == master_socket) {
 584                                 int client;
 585
 586                                 client = accept(master_socket, NULL, 0);
 587                                 if (client >= 0) {
 588                                         shutdown(client, SHUT_RDWR);
 589                                         close(client);
 590                                 }
 591                         } else {
 592                                 if (hmlan_parse_in(fd, dev) <= 0) {
 593                                         quit = 1;
 594                                 }
 595                         }
 596                 } else if (fd == -1) {
 597                         if (errno) {
 598                                 if (errno != ETIMEDOUT) {
 599                                         perror("hmcfgusb_poll");
 600                                         quit = 1;
 601                                 } else {
 602                                         /* periodically wakeup the device */
 603                                         hmcfgusb_send_null_frame(dev, 1);
 604                                         if (wait_for_h) {
 605                                                 memset(out, 0, sizeof(out));
 606                                                 out[0] = 'K';
 607                                                 hmcfgusb_send(dev, out, sizeof(out), 1);
 608                                         }
 609                                 }
 610                         }
 611                 }
 612
 613                 if (reboot_seconds && ((dev->opened_at + reboot_seconds) <= time(NULL))) {
 614                         if (verbose) {
 615                                 printf("HM-CFG-USB running since %lu seconds, rebooting now...\n",
 616                                         time(NULL) - dev->opened_at);
 617                         }
 618                         hmcfgusb_enter_bootloader(dev);
 619                 }
 620         }
 621
 622         hmcfgusb_close(dev);
 623         return 1;
 624 }
 625
 626 void sigterm_handler(int sig)
 627 {
 628         if (unlink(PID_FILE) == -1)
 629                 perror("Can't remove PID file");
 630
 631         exit(EXIT_SUCCESS);
 632 }
 633
 634 #define FLAG_DAEMON     (1 << 0)
 635 #define FLAG_PID_FILE   (1 << 1)
 636
 637 static int socket_server(char *iface, int port, int flags)
 638 {
 639         struct sigaction sact;
 640         struct sockaddr_in sin;
 641         int sock;
 642         int n;
 643         pid_t pid;
 644
 645         if (flags & FLAG_DAEMON) {
 646                 FILE *pidfile = NULL;
 647
 648                 if (flags & FLAG_PID_FILE) {
 649                         int fd;
 650
 651                         fd = open(PID_FILE, O_CREAT | O_EXCL | O_WRONLY, 0644);
 652                         if (fd == -1) {
 653                                 if (errno == EEXIST) {
 654                                         pid_t old_pid;
 655                                         pidfile = fopen(PID_FILE, "r");
 656                                         if (!pidfile) {
 657                                                 perror("PID file " PID_FILE " already exists, already running?");
 658                                                 exit(EXIT_FAILURE);
 659                                         }
 660
 661                                         if (fscanf(pidfile, "%u", &old_pid) != 1) {
 662                                                 fclose(pidfile);
 663                                                 fprintf(stderr, "Can't read old PID from " PID_FILE ", already running?\n");
 664                                                 exit(EXIT_FAILURE);
 665                                         }
 666
 667                                         fclose(pidfile);
 668
 669                                         fprintf(stderr, "Already running with PID %u according to " PID_FILE "!\n", old_pid);
 670                                         exit(EXIT_FAILURE);
 671                                 }
 672                                 perror("Can't create PID file " PID_FILE);
 673                                 exit(EXIT_FAILURE);
 674                         }
 675
 676                         pidfile = fdopen(fd, "w");
 677                         if (!pidfile) {
 678                                 perror("Can't reopen PID file fd");
 679                                 exit(EXIT_FAILURE);
 680                         }
 681
 682                         memset(&sact, 0, sizeof(sact));
 683                         sact.sa_handler = sigterm_handler;
 684
 685                         if (sigaction(SIGTERM, &sact, NULL) == -1) {
 686                                 perror("sigaction(SIGTERM)");
 687                                 exit(EXIT_FAILURE);
 688                         }
 689                 }
 690
 691                 pid = fork();
 692                 if (pid > 0) {
 693                         if (pidfile) {
 694                                 fprintf(pidfile, "%u\n", pid);
 695                                 fclose(pidfile);
 696                         }
 697
 698                         printf("Daemon with PID %u started!\n", pid);
 699                         exit(EXIT_SUCCESS);
 700                 } else if (pid < 0) {
 701                         perror("fork");
 702                         exit(EXIT_FAILURE);
 703                 }
 704
 705                 if (pidfile)
 706                         fclose(pidfile);
 707         }
 708
 709         memset(&sact, 0, sizeof(sact));
 710         sact.sa_handler = SIG_IGN;
 711
 712         if (sigaction(SIGPIPE, &sact, NULL) == -1) {
 713                 perror("sigaction(SIGPIPE)");
 714                 exit(EXIT_FAILURE);
 715         }
 716
 717         impersonate_hmlanif = 1;
 718
 719         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 720         if (sock == -1) {
 721                 perror("Can't open socket");
 722                 return EXIT_FAILURE;
 723         }
 724
 725         n = 1;
 726         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
 727                 perror("Can't set socket options");
 728                 return EXIT_FAILURE;
 729         }
 730
 731         memset(&sin, 0, sizeof(sin));
 732         sin.sin_family = AF_INET;
 733         sin.sin_port = htons(port);
 734         if (!iface) {
 735                 sin.sin_addr.s_addr = htonl(INADDR_ANY);
 736         } else {
 737                 if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) {
 738                         fprintf(stderr, "Can't convert IP %s, aborting!\n", iface);
 739                         return EXIT_FAILURE;
 740                 }
 741         }
 742
 743         if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
 744                 perror("Can't bind socket");
 745                 return EXIT_FAILURE;
 746         }
 747
 748         if (listen(sock, 1) == -1) {
 749                 perror("Can't listen on socket");
 750                 return EXIT_FAILURE;
 751         }
 752
 753         while(1) {
 754                 struct sockaddr_in csin;
 755                 socklen_t csinlen;
 756                 int client;
 757                 in_addr_t client_addr;
 758
 759                 memset(&csin, 0, sizeof(csin));
 760                 csinlen = sizeof(csin);
 761                 client = accept(sock, (struct sockaddr*)&csin, &csinlen);
 762                 if (client == -1) {
 763                         perror("Couldn't accept client");
 764                         continue;
 765                 }
 766
 767                 /* FIXME: getnameinfo... */
 768                 client_addr = ntohl(csin.sin_addr.s_addr);
 769
 770                 write_log(NULL, 0, "Client %d.%d.%d.%d connected!\n",
 771                                 (client_addr & 0xff000000) >> 24,
 772                                 (client_addr & 0x00ff0000) >> 16,
 773                                 (client_addr & 0x0000ff00) >> 8,
 774                                 (client_addr & 0x000000ff));
 775
 776                 comm(client, client, sock, flags);
 777
 778                 shutdown(client, SHUT_RDWR);
 779                 close(client);
 780
 781                 if (lan_read_buf)
 782                         free(lan_read_buf);
 783                 lan_read_buf = NULL;
 784                 lan_read_buflen = 0;
 785
 786                 write_log(NULL, 0, "Connection to %d.%d.%d.%d closed!\n",
 787                                 (client_addr & 0xff000000) >> 24,
 788                                 (client_addr & 0x00ff0000) >> 16,
 789                                 (client_addr & 0x0000ff00) >> 8,
 790                                 (client_addr & 0x000000ff));
 791                 sleep(1);
 792         }
 793
 794         return EXIT_SUCCESS;
 795 }
 796
 797 static int interactive_server(int flags)
 798 {
 799         if (!comm(STDIN_FILENO, STDOUT_FILENO, -1, flags))
 800                 return EXIT_FAILURE;
 801
 802         return EXIT_SUCCESS;
 803 }
 804
 805 void hmlan_syntax(char *prog)
 806 {
 807         fprintf(stderr, "Syntax: %s options\n\n", prog);
 808         fprintf(stderr, "Possible options:\n");
 809         fprintf(stderr, "\t-D\t\tdebug mode\n");
 810         fprintf(stderr, "\t-d\t\tdaemon mode\n");
 811         fprintf(stderr, "\t-h\t\tthis help\n");
 812         fprintf(stderr, "\t-i\t\tinteractive mode (connect HM-CFG-USB to terminal)\n");
 813         fprintf(stderr, "\t-l ip\t\tlisten on given IP address only (for example 127.0.0.1)\n");
 814         fprintf(stderr, "\t-L logfile\tlog network-communication to logfile\n");
 815         fprintf(stderr, "\t-P\t\tcreate PID file " PID_FILE " in daemon mode\n");
 816         fprintf(stderr, "\t-p n\t\tlisten on port n (default: 1000)\n");
 817         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);
 818         fprintf(stderr, "\t   hh:mm\treboot HM-CFG-USB daily at hh:mm\n");
 819         fprintf(stderr, "\t-v\t\tverbose mode\n");
 820         fprintf(stderr, "\t-V\t\tshow version (" VERSION ")\n");
 821
 822 }
 823
 824 int main(int argc, char **argv)
 825 {
 826         int port = 1000;
 827         char *iface = NULL;
 828         int interactive = 0;
 829         int flags = 0;
 830         char *ep;
 831         int opt;
 832
 833         while((opt = getopt(argc, argv, "DdhiPp:Rr:l:L:vV")) != -1) {
 834                 switch (opt) {
 835                         case 'D':
 836                                 debug = 1;
 837                                 verbose = 1;
 838                                 break;
 839                         case 'd':
 840                                 flags |= FLAG_DAEMON;
 841                                 break;
 842                         case 'i':
 843                                 interactive = 1;
 844                                 break;
 845                         case 'P':
 846                                 flags |= FLAG_PID_FILE;
 847                                 break;
 848                         case 'p':
 849                                 port = strtoul(optarg, &ep, 10);
 850                                 if (*ep != '\0') {
 851                                         fprintf(stderr, "Can't parse port!\n");
 852                                         exit(EXIT_FAILURE);
 853                                 }
 854                                 break;
 855                         case 'R':
 856                                 fprintf(stderr, "-R is no longer needed (1s wakeup is default)\n");
 857                                 break;
 858                         case 'r':
 859                                 reboot_seconds = strtoul(optarg, &ep, 10);
 860                                 if (*ep != '\0') {
 861                                         if (*ep == ':') {
 862                                                 reboot_at_hour = reboot_seconds;
 863                                                 ep++;
 864                                                 reboot_at_minute = strtoul(ep, &ep, 10);
 865                                                 if (*ep != '\0') {
 866                                                         fprintf(stderr, "Can't parse reboot-time!\n");
 867                                                         exit(EXIT_FAILURE);
 868                                                 }
 869
 870                                                 reboot_seconds = 0;
 871                                         } else {
 872                                                 fprintf(stderr, "Can't parse reboot-timeout!\n");
 873                                                 exit(EXIT_FAILURE);
 874                                         }
 875                                 }
 876                                 reboot_set = 1;
 877                                 break;
 878                         case 'l':
 879                                 iface = optarg;
 880                                 break;
 881                         case 'L':
 882                                 logfile = fopen(optarg, "a");
 883                                 if (!logfile) {
 884                                         perror("fopen(logfile)");
 885                                         exit(EXIT_FAILURE);
 886                                 }
 887                                 break;
 888                         case 'v':
 889                                 verbose = 1;
 890                                 break;
 891                         case 'V':
 892                                 printf("hmland " VERSION "\n");
 893                                 printf("Copyright (c) 2013 Michael Gernoth\n\n");
 894                                 exit(EXIT_SUCCESS);
 895                         case 'h':
 896                         case ':':
 897                         case '?':
 898                         default:
 899                                 hmlan_syntax(argv[0]);
 900                                 exit(EXIT_FAILURE);
 901                                 break;
 902                 }
 903         }
 904
 905         if (interactive) {
 906                 return interactive_server(flags);
 907         } else {
 908                 return socket_server(iface, port, flags);
 909         }
 910 }