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 #pragma GCC diagnostic push
 120 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
 121                         vfprintf(logfile, fmt, ap);
 122 #pragma GCC diagnostic pop
 123                         va_end(ap);
 124                 }
 125                 if (verbose) {
 126                         va_start(ap, fmt);
 127 #pragma GCC diagnostic push
 128 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
 129                         vprintf(fmt, ap);
 130 #pragma GCC diagnostic pop
 131                         va_end(ap);
 132                 }
 133         }
 134
 135         if (buf && len) {
 136                 for (i = 0; i < len; i++) {
 137                         if (logfile)
 138                                 fprintf(logfile, "%c", buf[i]);
 139                         if (verbose)
 140                                 printf("%c", buf[i]);
 141                 }
 142                 if (logfile)
 143                         fprintf(logfile, "\n");
 144                 if (verbose)
 145                         printf("\n");
 146         }
 147         if (logfile)
 148                 fflush(logfile);
 149 }
 150
 151 static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, size_t len, int flags)
 152 {
 153         uint8_t *buf_out = *outpos;
 154         uint8_t *outend = *outpos + outlen;
 155         uint8_t *inend = *inpos + inlen;
 156         size_t i;
 157
 158         if (flags & FLAG_COMMA_BEFORE) {
 159                 CHECK_SPACE(1);
 160                 **outpos=',';
 161                 *outpos += 1;
 162         }
 163
 164         if (flags & FLAG_LENGTH_BYTE) {
 165                 CHECK_AVAIL(1);
 166                 len = **inpos;
 167                 *inpos += 1;
 168         }
 169
 170         if (flags & FLAG_FORMAT_HEX) {
 171                 CHECK_AVAIL(len);
 172                 CHECK_SPACE(len*2);
 173                 for (i = 0; i < len; i++) {
 174                         **outpos = nibble_to_ascii(((**inpos) & 0xf0) >> 4);
 175                         *outpos += 1;
 176                         **outpos = nibble_to_ascii(((**inpos) & 0xf));
 177                         *inpos += 1; *outpos += 1;
 178                 }
 179         } else {
 180                 CHECK_AVAIL(len);
 181                 CHECK_SPACE(len);
 182                 memcpy(*outpos, *inpos, len);
 183                 *outpos += len;
 184                 *inpos += len;
 185         }
 186
 187         if (flags & FLAG_COMMA_AFTER) {
 188                 CHECK_SPACE(1);
 189                 **outpos=',';
 190                 *outpos += 1;
 191         }
 192
 193         if (flags & FLAG_NL) {
 194                 CHECK_SPACE(2);
 195                 **outpos='\r';
 196                 *outpos += 1;
 197                 **outpos='\n';
 198                 *outpos += 1;
 199         }
 200
 201         return *outpos - buf_out;
 202 }
 203
 204 static int parse_part_in(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int flags)
 205 {
 206         uint8_t *buf_out = *outpos;
 207         uint8_t *outend = *outpos + outlen;
 208         uint8_t *inend = *inpos + inlen;
 209
 210         if (flags & FLAG_LENGTH_BYTE) {
 211                 size_t len = 0;
 212                 uint8_t *ip;
 213
 214                 ip = *inpos;
 215                 while(ip < inend) {
 216                         if (*ip == ',') {
 217                                 ip++;
 218                                 if (!(flags & FLAG_IGNORE_COMMAS))
 219                                         break;
 220
 221                                 continue;
 222                         }
 223                         len++;
 224                         ip++;
 225                 }
 226                 CHECK_SPACE(1);
 227                 **outpos = (len / 2);
 228                 *outpos += 1;
 229         }
 230
 231         while(*inpos < inend) {
 232                 if (**inpos == ',') {
 233                         *inpos += 1;
 234                         if (!(flags & FLAG_IGNORE_COMMAS))
 235                                 break;
 236
 237                         continue;
 238                 }
 239
 240                 CHECK_SPACE(1);
 241                 CHECK_AVAIL(2);
 242
 243                 **outpos = ascii_to_nibble(**inpos) << 4;
 244                 *inpos += 1;
 245                 **outpos |= ascii_to_nibble(**inpos);
 246                 *inpos += 1; *outpos += 1;
 247         }
 248
 249         return *outpos - buf_out;
 250 }
 251
 252 static int hmlan_format_out(uint8_t *buf, int buf_len, void *data)
 253 {
 254         uint8_t out[1024];
 255         uint8_t *outpos;
 256         uint8_t *inpos;
 257         uint16_t version;
 258         int fd = *((int*)data);
 259         int w;
 260
 261         if (buf_len < 1)
 262                 return 1;
 263
 264         memset(out, 0, sizeof(out));
 265         outpos = out;
 266         inpos = buf;
 267
 268         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
 269         switch(buf[0]) {
 270                 case 'H':
 271                         if (impersonate_hmlanif) {
 272                                 buf[5] = 'L';
 273                                 buf[6] = 'A';
 274                                 buf[7] = 'N';
 275                         }
 276                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE);
 277                         version = inpos[0] << 8;
 278                         version |= inpos[1];
 279                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 280                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE);
 281                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 282                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 283                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 284                         if (version < 0x03c7) {
 285                                 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 286                         } else {
 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)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 289                         }
 290
 291                         if (!reboot_set) {
 292                                 int new_reboot_seconds;
 293
 294                                 if (version < 0x03c7) {
 295                                         new_reboot_seconds = DEFAULT_REBOOT_SECONDS;
 296                                 } else {
 297                                         new_reboot_seconds = 0;
 298                                 }
 299
 300                                 if (verbose && new_reboot_seconds && (reboot_seconds != new_reboot_seconds))
 301                                         printf("Rebooting in %u seconds due to old firmware (0.%d)\n",
 302                                                 new_reboot_seconds, version);
 303
 304                                 reboot_seconds = new_reboot_seconds;
 305                         }
 306
 307                         break;
 308                 case 'E':
 309                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
 310                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 311                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 312                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 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)), 0, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE | FLAG_NL);
 315
 316                         break;
 317                 case 'R':
 318                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
 319                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 320                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 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)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 323                         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);
 324
 325                         break;
 326                 case 'I':
 327                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
 328                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 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)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 331
 332                         break;
 333                 case 'G':
 334                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_NL);
 335
 336                         break;
 337                 default:
 338                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX | FLAG_NL);
 339                         hexdump(buf, buf_len, "Unknown> ");
 340                         break;
 341         }
 342
 343         /* Queue packet until first respone to 'K' is received */
 344         if (wait_for_h && buf[0] != 'H') {
 345                 struct queued_rx **rxp = &qrx;
 346
 347                 while (*rxp)
 348                         rxp = &((*rxp)->next);
 349
 350                 *rxp = malloc(sizeof(struct queued_rx));
 351                 if (!*rxp) {
 352                         perror("malloc");
 353                         return 0;
 354                 }
 355
 356                 memset(*rxp, 0, sizeof(struct queued_rx));
 357                 (*rxp)->len = outpos-out;
 358                 (*rxp)->rx = malloc((*rxp)->len);
 359                 if (!(*rxp)->rx) {
 360                         perror("malloc");
 361                         return 0;
 362                 }
 363                 memset((*rxp)->rx, 0, (*rxp)->len);
 364                 memcpy((*rxp)->rx, out, (*rxp)->len);
 365
 366                 return 1;
 367         }
 368
 369         write_log((char*)out, outpos-out-2, "LAN < ");
 370
 371         w = write(fd, out, outpos-out);
 372         if (w <= 0) {
 373                 perror("write");
 374                 return 0;
 375         }
 376
 377         /* Send all queued packets */
 378         if (wait_for_h) {
 379                 struct queued_rx *curr_rx = qrx;
 380                 struct queued_rx *last_rx;
 381
 382                 while (curr_rx) {
 383                         write_log(curr_rx->rx, curr_rx->len-2, "LAN < ");
 384
 385                         w = write(fd, curr_rx->rx, curr_rx->len);
 386                         if (w <= 0) {
 387                                 perror("write");
 388                         }
 389                         last_rx = curr_rx;
 390                         curr_rx = curr_rx->next;
 391
 392                         free(last_rx->rx);
 393                         free(last_rx);
 394                 }
 395
 396                 qrx = NULL;
 397
 398                 wait_for_h = 0;
 399         }
 400
 401         return 1;
 402 }
 403
 404 static int hmlan_parse_one(uint8_t *cmd, int last, void *data)
 405 {
 406         struct hmcfgusb_dev *dev = data;
 407         uint8_t out[0x40]; //FIXME!!!
 408         uint8_t *outpos;
 409         uint8_t *inpos = cmd;
 410
 411         outpos = out;
 412
 413         if (last == 0)
 414                 return 1;
 415
 416         write_log((char*)cmd, last,  "LAN > ");
 417
 418         memset(out, 0, sizeof(out));
 419         *outpos++ = *inpos++;
 420
 421         switch(*cmd) {
 422                 case 'S':
 423                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
 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)), 0);
 427                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
 428                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
 429                         break;
 430                 case 'Y':
 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                 case '+':
 436                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
 437                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
 438                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0);
 439                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
 440                         // Fallthrough to default expected, no break here
 441                 default:
 442                         parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
 443                         break;
 444         }
 445
 446         hmcfgusb_send(dev, out, sizeof(out), 1);
 447
 448         return 1;
 449 }
 450
 451 static int hmlan_parse_in(int fd, void *data)
 452 {
 453         uint8_t *newbuf;
 454         int r;
 455         int i;
 456
 457         newbuf = realloc(lan_read_buf, lan_read_buflen + LAN_READ_CHUNK_SIZE);
 458         if (!newbuf) {
 459                 perror("realloc");
 460                 return 0;
 461         }
 462         lan_read_buf = newbuf;
 463         r = read(fd, lan_read_buf + lan_read_buflen, LAN_READ_CHUNK_SIZE);
 464         if (r > 0) {
 465                 lan_read_buflen += r;
 466                 if (lan_read_buflen > LAN_MAX_BUF_LENGTH) {
 467                         if (verbose)
 468                                 printf("Our buffer is bigger than %d bytes (%d bytes), closing connection!\n", LAN_MAX_BUF_LENGTH, lan_read_buflen);
 469                         return -1;
 470                 }
 471                 while(lan_read_buflen > 0) {
 472                         int found = 0;
 473
 474                         for (i = 0; i < lan_read_buflen; i++) {
 475                                 if ((lan_read_buf[i] == '\r') || (lan_read_buf[i] == '\n')) {
 476                                         if (i > 0)
 477                                                 hmlan_parse_one(lan_read_buf, i, data);
 478                                         memmove(lan_read_buf, lan_read_buf + i + 1, lan_read_buflen - (i + 1));
 479                                         lan_read_buflen -= (i + 1);
 480                                         found = 1;
 481                                         break;
 482                                 }
 483                                 if (i > LAN_MAX_LINE_LENGTH) {
 484                                         if (verbose)
 485                                                 printf("Client sent more than %d bytes without newline, closing connection!\n", LAN_MAX_LINE_LENGTH);
 486                                         return -1;
 487                                 }
 488                         }
 489                         if (!found)
 490                                 break;
 491                         newbuf = realloc(lan_read_buf, lan_read_buflen);
 492                         if (lan_read_buflen && !newbuf) {
 493                                 perror("realloc");
 494                                 return 0;
 495                         }
 496                         lan_read_buf = newbuf;
 497                 }
 498         } else if (r < 0) {
 499                 if (errno != ECONNRESET)
 500                         perror("read");
 501                 return r;
 502         } else {
 503                 return 0;
 504         }
 505
 506         return 1;
 507 }
 508
 509 static int comm(int fd_in, int fd_out, int master_socket, int flags)
 510 {
 511         struct hmcfgusb_dev *dev;
 512         uint8_t out[0x40]; //FIXME!!!
 513         int quit = 0;
 514
 515         hmcfgusb_set_debug(debug);
 516
 517         dev = hmcfgusb_init(hmlan_format_out, &fd_out, serial);
 518         if (!dev) {
 519                 fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
 520                 return 0;
 521         }
 522
 523         if (dev->bootloader) {
 524                 if (verbose)
 525                         printf("HM-CFG-USB in bootloader mode, restarting in normal mode...\n");
 526
 527                 hmcfgusb_leave_bootloader(dev);
 528
 529                 hmcfgusb_close(dev);
 530                 sleep(1);
 531                 return 0;
 532         }
 533
 534         if ((reboot_at_hour != -1) && (reboot_at_minute != -1)) {
 535                 struct tm *tm_s;
 536                 time_t tm;
 537
 538                 tm = time(NULL);
 539                 tm_s = localtime(&tm);
 540                 if (tm_s == NULL) {
 541                         perror("localtime");
 542                         return 0;
 543                 }
 544
 545                 tm_s->tm_hour = reboot_at_hour;
 546                 tm_s->tm_min = reboot_at_minute;
 547                 tm_s->tm_sec = 0;
 548
 549                 tm = mktime(tm_s);
 550                 reboot_seconds = tm - dev->opened_at;
 551
 552                 while (reboot_seconds <= 0)
 553                         reboot_seconds += 86400;
 554         }
 555
 556         if (verbose && reboot_seconds)
 557                 printf("Rebooting in %u seconds\n", reboot_seconds);
 558
 559
 560         if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
 561                 fprintf(stderr, "Can't add client to pollfd!\n");
 562                 hmcfgusb_close(dev);
 563                 return 0;
 564         }
 565
 566         if (master_socket >= 0) {
 567                 if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
 568                         fprintf(stderr, "Can't add master_socket to pollfd!\n");
 569                         hmcfgusb_close(dev);
 570                         return 0;
 571                 }
 572         }
 573
 574         memset(out, 0, sizeof(out));
 575         out[0] = 'K';
 576         wait_for_h = 1;
 577         hmcfgusb_send_null_frame(dev, 1);
 578         hmcfgusb_send(dev, out, sizeof(out), 1);
 579
 580         while(!quit) {
 581                 int fd;
 582
 583                 fd = hmcfgusb_poll(dev, POLL_TIMEOUT_MS);
 584                 if (fd >= 0) {
 585                         if (fd == master_socket) {
 586                                 int client;
 587
 588                                 client = accept(master_socket, NULL, 0);
 589                                 if (client >= 0) {
 590                                         shutdown(client, SHUT_RDWR);
 591                                         close(client);
 592                                 }
 593                         } else {
 594                                 if (hmlan_parse_in(fd, dev) <= 0) {
 595                                         quit = 1;
 596                                 }
 597                         }
 598                 } else if (fd == -1) {
 599                         if (errno) {
 600                                 if (errno != ETIMEDOUT) {
 601                                         perror("hmcfgusb_poll");
 602                                         quit = 1;
 603                                 } else {
 604                                         /* periodically wakeup the device */
 605                                         hmcfgusb_send_null_frame(dev, 1);
 606                                         if (wait_for_h) {
 607                                                 memset(out, 0, sizeof(out));
 608                                                 out[0] = 'K';
 609                                                 hmcfgusb_send(dev, out, sizeof(out), 1);
 610                                         }
 611                                 }
 612                         }
 613                 }
 614
 615                 if (reboot_seconds && ((dev->opened_at + reboot_seconds) <= time(NULL))) {
 616                         if (verbose) {
 617                                 printf("HM-CFG-USB running since %lu seconds, rebooting now...\n",
 618                                         time(NULL) - dev->opened_at);
 619                         }
 620                         hmcfgusb_enter_bootloader(dev);
 621                 }
 622         }
 623
 624         hmcfgusb_close(dev);
 625         return 1;
 626 }
 627
 628 void sigterm_handler(int sig)
 629 {
 630         if (unlink(PID_FILE) == -1)
 631                 perror("Can't remove PID file");
 632
 633         exit(EXIT_SUCCESS);
 634 }
 635
 636 #define FLAG_DAEMON     (1 << 0)
 637 #define FLAG_PID_FILE   (1 << 1)
 638
 639 static int socket_server(char *iface, int port, int flags)
 640 {
 641         struct sigaction sact;
 642         struct sockaddr_in sin;
 643         int sock;
 644         int n;
 645         pid_t pid;
 646
 647         if (flags & FLAG_DAEMON) {
 648                 FILE *pidfile = NULL;
 649
 650                 if (flags & FLAG_PID_FILE) {
 651                         int fd;
 652
 653                         fd = open(PID_FILE, O_CREAT | O_EXCL | O_WRONLY, 0644);
 654                         if (fd == -1) {
 655                                 if (errno == EEXIST) {
 656                                         pid_t old_pid;
 657                                         pidfile = fopen(PID_FILE, "r");
 658                                         if (!pidfile) {
 659                                                 perror("PID file " PID_FILE " already exists, already running?");
 660                                                 exit(EXIT_FAILURE);
 661                                         }
 662
 663                                         if (fscanf(pidfile, "%d", &old_pid) != 1) {
 664                                                 fclose(pidfile);
 665                                                 fprintf(stderr, "Can't read old PID from " PID_FILE ", already running?\n");
 666                                                 exit(EXIT_FAILURE);
 667                                         }
 668
 669                                         fclose(pidfile);
 670
 671                                         fprintf(stderr, "Already running with PID %u according to " PID_FILE "!\n", old_pid);
 672                                         exit(EXIT_FAILURE);
 673                                 }
 674                                 perror("Can't create PID file " PID_FILE);
 675                                 exit(EXIT_FAILURE);
 676                         }
 677
 678                         pidfile = fdopen(fd, "w");
 679                         if (!pidfile) {
 680                                 perror("Can't reopen PID file fd");
 681                                 exit(EXIT_FAILURE);
 682                         }
 683
 684                         memset(&sact, 0, sizeof(sact));
 685                         sact.sa_handler = sigterm_handler;
 686
 687                         if (sigaction(SIGTERM, &sact, NULL) == -1) {
 688                                 perror("sigaction(SIGTERM)");
 689                                 exit(EXIT_FAILURE);
 690                         }
 691                 }
 692
 693                 pid = fork();
 694                 if (pid > 0) {
 695                         if (pidfile) {
 696                                 fprintf(pidfile, "%u\n", pid);
 697                                 fclose(pidfile);
 698                         }
 699
 700                         printf("Daemon with PID %u started!\n", pid);
 701                         exit(EXIT_SUCCESS);
 702                 } else if (pid < 0) {
 703                         perror("fork");
 704                         exit(EXIT_FAILURE);
 705                 }
 706
 707                 if (pidfile)
 708                         fclose(pidfile);
 709         }
 710
 711         memset(&sact, 0, sizeof(sact));
 712         sact.sa_handler = SIG_IGN;
 713
 714         if (sigaction(SIGPIPE, &sact, NULL) == -1) {
 715                 perror("sigaction(SIGPIPE)");
 716                 exit(EXIT_FAILURE);
 717         }
 718
 719         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 720         if (sock == -1) {
 721                 perror("Can't open socket");
 722                 return EXIT_FAILURE;
 723         }
 724
 725         n = 1;
 726         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
 727                 perror("Can't set socket options");
 728                 return EXIT_FAILURE;
 729         }
 730
 731         memset(&sin, 0, sizeof(sin));
 732         sin.sin_family = AF_INET;
 733         sin.sin_port = htons(port);
 734         if (!iface) {
 735                 sin.sin_addr.s_addr = htonl(INADDR_ANY);
 736         } else {
 737                 if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) {
 738                         fprintf(stderr, "Can't convert IP %s, aborting!\n", iface);
 739                         return EXIT_FAILURE;
 740                 }
 741         }
 742
 743         if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
 744                 perror("Can't bind socket");
 745                 return EXIT_FAILURE;
 746         }
 747
 748         if (listen(sock, 1) == -1) {
 749                 perror("Can't listen on socket");
 750                 return EXIT_FAILURE;
 751         }
 752
 753         while(1) {
 754                 struct sockaddr_in csin;
 755                 socklen_t csinlen;
 756                 int client;
 757                 in_addr_t client_addr;
 758
 759                 memset(&csin, 0, sizeof(csin));
 760                 csinlen = sizeof(csin);
 761                 client = accept(sock, (struct sockaddr*)&csin, &csinlen);
 762                 if (client == -1) {
 763                         perror("Couldn't accept client");
 764                         continue;
 765                 }
 766
 767                 /* FIXME: getnameinfo... */
 768                 client_addr = ntohl(csin.sin_addr.s_addr);
 769
 770                 write_log(NULL, 0, "Client %d.%d.%d.%d connected!\n",
 771                                 (client_addr & 0xff000000) >> 24,
 772                                 (client_addr & 0x00ff0000) >> 16,
 773                                 (client_addr & 0x0000ff00) >> 8,
 774                                 (client_addr & 0x000000ff));
 775
 776                 comm(client, client, sock, flags);
 777
 778                 shutdown(client, SHUT_RDWR);
 779                 close(client);
 780
 781                 if (lan_read_buf)
 782                         free(lan_read_buf);
 783                 lan_read_buf = NULL;
 784                 lan_read_buflen = 0;
 785
 786                 write_log(NULL, 0, "Connection to %d.%d.%d.%d closed!\n",
 787                                 (client_addr & 0xff000000) >> 24,
 788                                 (client_addr & 0x00ff0000) >> 16,
 789                                 (client_addr & 0x0000ff00) >> 8,
 790                                 (client_addr & 0x000000ff));
 791                 sleep(1);
 792         }
 793
 794         return EXIT_SUCCESS;
 795 }
 796
 797 static int interactive_server(int flags)
 798 {
 799         if (!comm(STDIN_FILENO, STDOUT_FILENO, -1, flags))
 800                 return EXIT_FAILURE;
 801
 802         return EXIT_SUCCESS;
 803 }
 804
 805 void hmlan_syntax(char *prog)
 806 {
 807         fprintf(stderr, "Syntax: %s options\n\n", prog);
 808         fprintf(stderr, "Possible options:\n");
 809         fprintf(stderr, "\t-D\t\tdebug mode\n");
 810         fprintf(stderr, "\t-d\t\tdaemon mode\n");
 811         fprintf(stderr, "\t-h\t\tthis help\n");
 812         fprintf(stderr, "\t-I\t\tpretend to be HM-LAN-IF for compatibility with client-software (previous default)\n");
 813         fprintf(stderr, "\t-i\t\tinteractive mode (connect HM-CFG-USB to terminal)\n");
 814         fprintf(stderr, "\t-l ip\t\tlisten on given IP address only (for example 127.0.0.1)\n");
 815         fprintf(stderr, "\t-L logfile\tlog network-communication to logfile\n");
 816         fprintf(stderr, "\t-P\t\tcreate PID file " PID_FILE " in daemon mode\n");
 817         fprintf(stderr, "\t-p n\t\tlisten on port n (default: 1000)\n");
 818         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);
 819         fprintf(stderr, "\t   hh:mm\treboot HM-CFG-USB daily at hh:mm\n");
 820         fprintf(stderr, "\t-S serial\tuse HM-CFG-USB with given serial (for multiple hmland instances)\n");
 821         fprintf(stderr, "\t-v\t\tverbose mode\n");
 822         fprintf(stderr, "\t-V\t\tshow version (" VERSION ")\n");
 823
 824 }
 825
 826 int main(int argc, char **argv)
 827 {
 828         int port = 1000;
 829         char *iface = NULL;
 830         int interactive = 0;
 831         int flags = 0;
 832         char *ep;
 833         int opt;
 834
 835         while((opt = getopt(argc, argv, "DdhIiPp:Rr:l:L:S:vV")) != -1) {
 836                 switch (opt) {
 837                         case 'D':
 838                                 debug = 1;
 839                                 verbose = 1;
 840                                 break;
 841                         case 'd':
 842                                 flags |= FLAG_DAEMON;
 843                                 break;
 844                         case 'I':
 845                                 impersonate_hmlanif = 1;
 846                                 break;
 847                         case 'i':
 848                                 interactive = 1;
 849                                 break;
 850                         case 'P':
 851                                 flags |= FLAG_PID_FILE;
 852                                 break;
 853                         case 'p':
 854                                 port = strtoul(optarg, &ep, 10);
 855                                 if (*ep != '\0') {
 856                                         fprintf(stderr, "Can't parse port!\n");
 857                                         exit(EXIT_FAILURE);
 858                                 }
 859                                 break;
 860                         case 'R':
 861                                 fprintf(stderr, "-R is no longer needed (1s wakeup is default)\n");
 862                                 break;
 863                         case 'r':
 864                                 reboot_seconds = strtoul(optarg, &ep, 10);
 865                                 if (*ep != '\0') {
 866                                         if (*ep == ':') {
 867                                                 reboot_at_hour = reboot_seconds;
 868                                                 ep++;
 869                                                 reboot_at_minute = strtoul(ep, &ep, 10);
 870                                                 if (*ep != '\0') {
 871                                                         fprintf(stderr, "Can't parse reboot-time!\n");
 872                                                         exit(EXIT_FAILURE);
 873                                                 }
 874
 875                                                 reboot_seconds = 0;
 876                                         } else {
 877                                                 fprintf(stderr, "Can't parse reboot-timeout!\n");
 878                                                 exit(EXIT_FAILURE);
 879                                         }
 880                                 }
 881                                 reboot_set = 1;
 882                                 break;
 883                         case 'l':
 884                                 iface = optarg;
 885                                 break;
 886                         case 'L':
 887                                 logfile = fopen(optarg, "a");
 888                                 if (!logfile) {
 889                                         perror("fopen(logfile)");
 890                                         exit(EXIT_FAILURE);
 891                                 }
 892                                 break;
 893                         case 'S':
 894                                 serial = optarg;
 895                                 break;
 896                         case 'v':
 897                                 verbose = 1;
 898                                 break;
 899                         case 'V':
 900                                 printf("hmland " VERSION "\n");
 901                                 printf("Copyright (c) 2013-16 Michael Gernoth\n\n");
 902                                 exit(EXIT_SUCCESS);
 903                         case 'h':
 904                         case ':':
 905                         case '?':
 906                         default:
 907                                 hmlan_syntax(argv[0]);
 908                                 exit(EXIT_FAILURE);
 909                                 break;
 910                 }
 911         }
 912
 913         if (interactive) {
 914                 return interactive_server(flags);
 915         } else {
 916                 return socket_server(iface, port, flags);
 917         }
 918 }