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