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                         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 }