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

   1 /* HM-CFG-LAN emulation for HM-CFG-USB
   2  *
   3  * Copyright (c) 2013 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 <string.h>
  29 #include <strings.h>
  30 #include <poll.h>
  31 #include <signal.h>
  32 #include <errno.h>
  33 #include <sys/types.h>
  34 #include <sys/socket.h>
  35 #include <sys/stat.h>
  36 #include <fcntl.h>
  37 #include <netinet/in.h>
  38 #include <arpa/inet.h>
  39 #include <libusb-1.0/libusb.h>
  40
  41 #include "hexdump.h"
  42 #include "hmcfgusb.h"
  43
  44 #define PID_FILE "/var/run/hmland.pid"
  45
  46 extern char *optarg;
  47
  48 static int impersonate_hmlanif = 0;
  49 static int debug = 0;
  50 static int verbose = 0;
  51
  52 struct queued_rx {
  53         char *rx;
  54         int len;
  55         struct queued_rx *next;
  56 };
  57
  58 static struct queued_rx *qrx = NULL;
  59 static int wait_for_h = 0;
  60
  61 #define FLAG_LENGTH_BYTE        (1<<0)
  62 #define FLAG_FORMAT_HEX         (1<<1)
  63 #define FLAG_COMMA_BEFORE       (1<<2)
  64 #define FLAG_COMMA_AFTER        (1<<3)
  65 #define FLAG_NL                 (1<<4)
  66 #define FLAG_IGNORE_COMMAS      (1<<5)
  67
  68 #define CHECK_SPACE(x)          if ((*outpos + x) > outend) { fprintf(stderr, "Not enough space!\n"); return 0; }
  69 #define CHECK_AVAIL(x)          if ((*inpos + x) > inend) { fprintf(stderr, "Not enough input available!\n"); return 0; }
  70
  71 static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int len, int flags)
  72 {
  73         const uint8_t nibble[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
  74                 'A', 'B', 'C', 'D', 'E', 'F'};
  75         uint8_t *buf_out = *outpos;
  76         uint8_t *outend = *outpos + outlen;
  77         uint8_t *inend = *inpos + inlen;
  78         int i;
  79
  80         if (flags & FLAG_COMMA_BEFORE) {
  81                 CHECK_SPACE(1);
  82                 **outpos=',';
  83                 *outpos += 1;
  84         }
  85
  86         if (flags & FLAG_LENGTH_BYTE) {
  87                 CHECK_AVAIL(1);
  88                 len = **inpos;
  89                 *inpos += 1;
  90         }
  91
  92         if (flags & FLAG_FORMAT_HEX) {
  93                 CHECK_AVAIL(len);
  94                 CHECK_SPACE(len*2);
  95                 for (i = 0; i < len; i++) {
  96                         **outpos = nibble[((**inpos) & 0xf0) >> 4];
  97                         *outpos += 1;
  98                         **outpos = nibble[((**inpos) & 0xf)];
  99                         *inpos += 1; *outpos += 1;
 100                 }
 101         } else {
 102                 CHECK_AVAIL(len);
 103                 CHECK_SPACE(len);
 104                 memcpy(*outpos, *inpos, len);
 105                 *outpos += len;
 106                 *inpos += len;
 107         }
 108
 109         if (flags & FLAG_COMMA_AFTER) {
 110                 CHECK_SPACE(1);
 111                 **outpos=',';
 112                 *outpos += 1;
 113         }
 114
 115         if (flags & FLAG_NL) {
 116                 CHECK_SPACE(2);
 117                 **outpos='\r';
 118                 *outpos += 1;
 119                 **outpos='\n';
 120                 *outpos += 1;
 121         }
 122
 123         return *outpos - buf_out;
 124 }
 125
 126 static uint8_t ascii_to_nibble(uint8_t a)
 127 {
 128         uint8_t c = 0x00;
 129
 130         if ((a >= '0') && (a <= '9')) {
 131                 c = a - '0';
 132         } else if ((a >= 'A') && (a <= 'F')) {
 133                 c = (a - 'A') + 10;
 134         } else if ((a >= 'a') && (a <= 'f')) {
 135                 c = (a - 'a') + 10;
 136         }
 137
 138         return c;
 139 }
 140
 141 static int parse_part_in(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int flags)
 142 {
 143         uint8_t *buf_out = *outpos;
 144         uint8_t *outend = *outpos + outlen;
 145         uint8_t *inend = *inpos + inlen;
 146
 147         if (flags & FLAG_LENGTH_BYTE) {
 148                 int len = 0;
 149                 uint8_t *ip;
 150
 151                 ip = *inpos;
 152                 while(ip < inend) {
 153                         if (*ip == ',') {
 154                                 ip++;
 155                                 if (!(flags & FLAG_IGNORE_COMMAS))
 156                                         break;
 157
 158                                 continue;
 159                         }
 160                         len++;
 161                         ip++;
 162                 }
 163                 CHECK_SPACE(1);
 164                 **outpos = (len / 2);
 165                 *outpos += 1;
 166         }
 167
 168         while(*inpos < inend) {
 169                 if (**inpos == ',') {
 170                         *inpos += 1;
 171                         if (!(flags & FLAG_IGNORE_COMMAS))
 172                                 break;
 173
 174                         continue;
 175                 }
 176
 177                 CHECK_SPACE(1);
 178                 CHECK_AVAIL(2);
 179
 180                 **outpos = ascii_to_nibble(**inpos) << 4;
 181                 *inpos += 1;
 182                 **outpos |= ascii_to_nibble(**inpos);
 183                 *inpos += 1; *outpos += 1;
 184         }
 185
 186         return *outpos - buf_out;
 187 }
 188
 189 static int hmlan_format_out(uint8_t *buf, int buf_len, void *data)
 190 {
 191         uint8_t out[1024];
 192         uint8_t *outpos;
 193         uint8_t *inpos;
 194         int fd = *((int*)data);
 195         int w;
 196
 197         if (buf_len < 1)
 198                 return 1;
 199
 200         memset(out, 0, sizeof(out));
 201         outpos = out;
 202         inpos = buf;
 203
 204         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
 205         switch(buf[0]) {
 206                 case 'H':
 207                         if (impersonate_hmlanif) {
 208                                 buf[5] = 'L';
 209                                 buf[6] = 'A';
 210                                 buf[7] = 'N';
 211                         }
 212                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE);
 213                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 214                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE);
 215                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 216                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 217                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 218                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 219
 220                         break;
 221                 case 'E':
 222                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
 223                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 224                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 225                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 226                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 227                         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);
 228
 229                         break;
 230                 case 'R':
 231                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
 232                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 233                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 234                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 235                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 236                         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);
 237
 238                         break;
 239                 case 'I':
 240                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
 241                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 242                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 243                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 244
 245                         break;
 246                 default:
 247                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX | FLAG_NL);
 248                         hexdump(buf, buf_len, "Unknown> ");
 249                         break;
 250         }
 251
 252         /* Queue packet until first respone to 'K' is received */
 253         if (wait_for_h && buf[0] != 'H') {
 254                 struct queued_rx **rxp = &qrx;
 255
 256                 while (*rxp)
 257                         rxp = &((*rxp)->next);
 258
 259                 *rxp = malloc(sizeof(struct queued_rx));
 260                 if (!*rxp) {
 261                         perror("malloc");
 262                         return 0;
 263                 }
 264
 265                 memset(*rxp, 0, sizeof(struct queued_rx));
 266                 (*rxp)->len = outpos-out;
 267                 (*rxp)->rx = malloc((*rxp)->len);
 268                 if (!(*rxp)->rx) {
 269                         perror("malloc");
 270                         return 0;
 271                 }
 272                 memset((*rxp)->rx, 0, (*rxp)->len);
 273                 memcpy((*rxp)->rx, out, (*rxp)->len);
 274
 275                 return 1;
 276         }
 277
 278         if (verbose) {
 279                 int i;
 280
 281                 printf("LAN < ");
 282                 for (i = 0; i < outpos-out-2; i++)
 283                         printf("%c", out[i]);
 284                 printf("\n");
 285         }
 286
 287         w = write(fd, out, outpos-out);
 288         if (w <= 0) {
 289                 perror("write");
 290                 return 0;
 291         }
 292
 293         /* Send all queued packets */
 294         if (wait_for_h) {
 295                 struct queued_rx *curr_rx = qrx;
 296                 struct queued_rx *last_rx;
 297
 298                 while (curr_rx) {
 299                         if (verbose) {
 300                                 int i;
 301
 302                                 printf("LAN < ");
 303                                 for (i = 0; i < curr_rx->len-2; i++)
 304                                         printf("%c", curr_rx->rx[i]);
 305                                 printf("\n");
 306                         }
 307
 308                         w = write(fd, curr_rx->rx, curr_rx->len);
 309                         if (w <= 0) {
 310                                 perror("write");
 311                         }
 312                         last_rx = curr_rx;
 313                         curr_rx = curr_rx->next;
 314
 315                         free(last_rx->rx);
 316                         free(last_rx);
 317                 }
 318
 319                 qrx = NULL;
 320
 321                 wait_for_h = 0;
 322         }
 323
 324         return 1;
 325 }
 326
 327 static int hmlan_parse_in(int fd, void *data)
 328 {
 329         struct hmcfgusb_dev *dev = data;
 330         uint8_t buf[1025];
 331         uint8_t out[0x40]; //FIXME!!!
 332         uint8_t *outpos;
 333         uint8_t *inpos;
 334         int i;
 335         int last;
 336         int r;
 337
 338         memset(buf, 0, sizeof(buf));
 339
 340         r = read(fd, buf, sizeof(buf)-1);
 341         if (r > 0) {
 342                 uint8_t *inend = buf + r;
 343
 344                 inpos = buf;
 345
 346                 while (inpos < inend) {
 347                         uint8_t *instart = inpos;
 348
 349                         if ((*inpos == '\r') || (*inpos == '\n')) {
 350                                 inpos++;
 351                                 continue;
 352                         }
 353
 354                         outpos = out;
 355
 356                         last = inend - inpos;
 357
 358                         for (i = 0; i < last; i++) {
 359                                 if ((inpos[i] == '\r') || (inpos[i] == '\n')) {
 360                                         last = i;
 361                                         break;
 362                                 }
 363                         }
 364
 365                         if (last == 0)
 366                                 continue;
 367
 368                         if (verbose) {
 369                                 printf("LAN > ");
 370                                 for (i = 0; i < last; i++)
 371                                         printf("%c", instart[i]);
 372                                 printf("\n");
 373                         }
 374
 375                         memset(out, 0, sizeof(out));
 376                         *outpos++ = *inpos++;
 377
 378                         switch(*instart) {
 379                                 case 'S':
 380                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 381                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 382                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 383                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 384                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 385                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
 386                                         break;
 387                                 case 'Y':
 388                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 389                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 390                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
 391                                         break;
 392                                 default:
 393                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
 394                                         break;
 395                         }
 396
 397                         hmcfgusb_send(dev, out, sizeof(out), 1);
 398                 }
 399         } else if (r < 0) {
 400                 perror("read");
 401                 return r;
 402         } else {
 403                 return 0;
 404         }
 405
 406         return 1;
 407 }
 408
 409 static int comm(int fd_in, int fd_out, int master_socket, int flags)
 410 {
 411         struct hmcfgusb_dev *dev;
 412         uint8_t out[0x40]; //FIXME!!!
 413         int quit = 0;
 414
 415         hmcfgusb_set_debug(debug);
 416
 417         dev = hmcfgusb_init(hmlan_format_out, &fd_out);
 418         if (!dev) {
 419                 fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
 420                 return 0;
 421         }
 422
 423         if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
 424                 fprintf(stderr, "Can't add client to pollfd!\n");
 425                 hmcfgusb_close(dev);
 426                 return 0;
 427         }
 428
 429         if (master_socket >= 0) {
 430                 if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
 431                         fprintf(stderr, "Can't add master_socket to pollfd!\n");
 432                         hmcfgusb_close(dev);
 433                         return 0;
 434                 }
 435         }
 436
 437         memset(out, 0, sizeof(out));
 438         out[0] = 'K';
 439         wait_for_h = 1;
 440         hmcfgusb_send_null_frame(dev);
 441         hmcfgusb_send(dev, out, sizeof(out), 1);
 442
 443         while(!quit) {
 444                 int fd;
 445
 446                 fd = hmcfgusb_poll(dev, 1);     /* Wakeup device/bus at least once a second */
 447                 if (fd >= 0) {
 448                         if (fd == master_socket) {
 449                                 int client;
 450
 451                                 client = accept(master_socket, NULL, 0);
 452                                 if (client >= 0) {
 453                                         shutdown(client, SHUT_RDWR);
 454                                         close(client);
 455                                 }
 456                         } else {
 457                                 if (hmlan_parse_in(fd, dev) <= 0) {
 458                                         quit = 1;
 459                                 }
 460                         }
 461                 } else if (fd == -1) {
 462                         if (errno) {
 463                                 perror("hmcfgusb_poll");
 464                                 quit = 1;
 465                         } else {
 466                                 /* periodically wakeup the device */
 467                                 hmcfgusb_send_null_frame(dev);
 468                         }
 469                 }
 470         }
 471
 472         hmcfgusb_close(dev);
 473         return 1;
 474 }
 475
 476 void sigterm_handler(int sig)
 477 {
 478         if (unlink(PID_FILE) == -1)
 479                 perror("Can't remove PID file");
 480
 481         exit(EXIT_SUCCESS);
 482 }
 483
 484 #define FLAG_DAEMON     (1 << 0)
 485 #define FLAG_PID_FILE   (1 << 1)
 486
 487 static int socket_server(char *iface, int port, int flags)
 488 {
 489         struct sigaction sact;
 490         struct sockaddr_in sin;
 491         int sock;
 492         int n;
 493         pid_t pid;
 494
 495         if (flags & FLAG_DAEMON) {
 496                 FILE *pidfile = NULL;
 497
 498                 if (flags & FLAG_PID_FILE) {
 499                         int fd;
 500
 501                         fd = open(PID_FILE, O_CREAT | O_EXCL | O_WRONLY, 0644);
 502                         if (fd == -1) {
 503                                 if (errno == EEXIST) {
 504                                         pid_t old_pid;
 505                                         pidfile = fopen(PID_FILE, "r");
 506                                         if (!pidfile) {
 507                                                 perror("PID file " PID_FILE " already exists, already running?");
 508                                                 exit(EXIT_FAILURE);
 509                                         }
 510
 511                                         if (fscanf(pidfile, "%u", &old_pid) != 1) {
 512                                                 fclose(pidfile);
 513                                                 fprintf(stderr, "Can't read old PID from " PID_FILE ", already running?\n");
 514                                                 exit(EXIT_FAILURE);
 515                                         }
 516
 517                                         fclose(pidfile);
 518
 519                                         fprintf(stderr, "Already running with PID %u according to " PID_FILE "!\n", old_pid);
 520                                         exit(EXIT_FAILURE);
 521                                 }
 522                                 perror("Can't create PID file " PID_FILE);
 523                                 exit(EXIT_FAILURE);
 524                         }
 525
 526                         pidfile = fdopen(fd, "w");
 527                         if (!pidfile) {
 528                                 perror("Can't reopen PID file fd");
 529                                 exit(EXIT_FAILURE);
 530                         }
 531
 532                         memset(&sact, 0, sizeof(sact));
 533                         sact.sa_handler = sigterm_handler;
 534
 535                         if (sigaction(SIGTERM, &sact, NULL) == -1) {
 536                                 perror("sigaction(SIGTERM)");
 537                                 exit(EXIT_FAILURE);
 538                         }
 539                 }
 540
 541                 pid = fork();
 542                 if (pid > 0) {
 543                         if (pidfile) {
 544                                 fprintf(pidfile, "%u\n", pid);
 545                                 fclose(pidfile);
 546                         }
 547
 548                         printf("Daemon with PID %u started!\n", pid);
 549                         exit(EXIT_SUCCESS);
 550                 } else if (pid < 0) {
 551                         perror("fork");
 552                         exit(EXIT_FAILURE);
 553                 }
 554
 555                 if (pidfile)
 556                         fclose(pidfile);
 557         }
 558
 559         memset(&sact, 0, sizeof(sact));
 560         sact.sa_handler = SIG_IGN;
 561
 562         if (sigaction(SIGPIPE, &sact, NULL) == -1) {
 563                 perror("sigaction(SIGPIPE)");
 564                 exit(EXIT_FAILURE);
 565         }
 566
 567         impersonate_hmlanif = 1;
 568
 569         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 570         if (sock == -1) {
 571                 perror("Can't open socket");
 572                 return EXIT_FAILURE;
 573         }
 574
 575         n = 1;
 576         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
 577                 perror("Can't set socket options");
 578                 return EXIT_FAILURE;
 579         }
 580
 581         memset(&sin, 0, sizeof(sin));
 582         sin.sin_family = AF_INET;
 583         sin.sin_port = htons(port);
 584         if (!iface) {
 585                 sin.sin_addr.s_addr = htonl(INADDR_ANY);
 586         } else {
 587                 if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) {
 588                         perror("inet_ntop");
 589                         return EXIT_FAILURE;
 590                 }
 591         }
 592
 593         if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
 594                 perror("Can't bind socket");
 595                 return EXIT_FAILURE;
 596         }
 597
 598         if (listen(sock, 1) == -1) {
 599                 perror("Can't listen on socket");
 600                 return EXIT_FAILURE;
 601         }
 602
 603         while(1) {
 604                 struct sockaddr_in csin;
 605                 socklen_t csinlen;
 606                 int client;
 607                 in_addr_t client_addr;
 608
 609                 memset(&csin, 0, sizeof(csin));
 610                 csinlen = sizeof(csin);
 611                 client = accept(sock, (struct sockaddr*)&csin, &csinlen);
 612                 if (client == -1) {
 613                         perror("Couldn't accept client");
 614                         continue;
 615                 }
 616
 617                 /* FIXME: getnameinfo... */
 618                 client_addr = ntohl(csin.sin_addr.s_addr);
 619
 620                 if (verbose) {
 621                         printf("Client %d.%d.%d.%d connected!\n",
 622                                         (client_addr & 0xff000000) >> 24,
 623                                         (client_addr & 0x00ff0000) >> 16,
 624                                         (client_addr & 0x0000ff00) >> 8,
 625                                         (client_addr & 0x000000ff));
 626                 }
 627
 628                 comm(client, client, sock, flags);
 629
 630                 shutdown(client, SHUT_RDWR);
 631                 close(client);
 632
 633                 if (verbose) {
 634                         printf("Connection to %d.%d.%d.%d closed!\n",
 635                                         (client_addr & 0xff000000) >> 24,
 636                                         (client_addr & 0x00ff0000) >> 16,
 637                                         (client_addr & 0x0000ff00) >> 8,
 638                                         (client_addr & 0x000000ff));
 639                 }
 640                 sleep(1);
 641         }
 642
 643         return EXIT_SUCCESS;
 644 }
 645
 646 static int interactive_server(int flags)
 647 {
 648         if (!comm(STDIN_FILENO, STDOUT_FILENO, -1, flags))
 649                 return EXIT_FAILURE;
 650
 651         return EXIT_SUCCESS;
 652 }
 653
 654 void hmlan_syntax(char *prog)
 655 {
 656         fprintf(stderr, "Syntax: %s options\n\n", prog);
 657         fprintf(stderr, "Possible options:\n");
 658         fprintf(stderr, "\t-D\tdebug mode\n");
 659         fprintf(stderr, "\t-d\tdaemon mode\n");
 660         fprintf(stderr, "\t-h\tthis help\n");
 661         fprintf(stderr, "\t-i\tinteractive mode (connect HM-CFG-USB to terminal)\n");
 662         fprintf(stderr, "\t-l ip\tlisten on given IP address only (for example 127.0.0.1)\n");
 663         fprintf(stderr, "\t-P\tcreate PID file " PID_FILE " in daemon mode\n");
 664         fprintf(stderr, "\t-p n\tlisten on port n (default 1000)\n");
 665         fprintf(stderr, "\t-v\tverbose mode\n");
 666
 667 }
 668
 669 int main(int argc, char **argv)
 670 {
 671         int port = 1000;
 672         char *iface = NULL;
 673         int interactive = 0;
 674         int flags = 0;
 675         char *ep;
 676         int opt;
 677
 678         while((opt = getopt(argc, argv, "DdhiPp:Rl:v")) != -1) {
 679                 switch (opt) {
 680                         case 'D':
 681                                 debug = 1;
 682                                 verbose = 1;
 683                                 break;
 684                         case 'd':
 685                                 flags |= FLAG_DAEMON;
 686                                 break;
 687                         case 'i':
 688                                 interactive = 1;
 689                                 break;
 690                         case 'P':
 691                                 flags |= FLAG_PID_FILE;
 692                                 break;
 693                         case 'p':
 694                                 port = strtoul(optarg, &ep, 10);
 695                                 if (*ep != '\0') {
 696                                         fprintf(stderr, "Can't parse port!\n");
 697                                         exit(EXIT_FAILURE);
 698                                 }
 699                                 break;
 700                         case 'R':
 701                                 fprintf(stderr, "-R is no longer needed (1s wakeup is default)\n");
 702                                 break;
 703                         case 'l':
 704                                 iface = optarg;
 705                                 break;
 706                         case 'v':
 707                                 verbose = 1;
 708                                 break;
 709                         case 'h':
 710                         case ':':
 711                         case '?':
 712                         default:
 713                                 hmlan_syntax(argv[0]);
 714                                 exit(EXIT_FAILURE);
 715                                 break;
 716                 }
 717         }
 718
 719         if (interactive) {
 720                 return interactive_server(flags);
 721         } else {
 722                 return socket_server(iface, port, flags);
 723         }
 724 }