cvs.zerfleddert.de Git - hmcfgusb/blob - hmland.c

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