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 #define FLAG_LENGTH_BYTE        (1<<0)
  53 #define FLAG_FORMAT_HEX         (1<<1)
  54 #define FLAG_COMMA_BEFORE       (1<<2)
  55 #define FLAG_COMMA_AFTER        (1<<3)
  56 #define FLAG_NL                 (1<<4)
  57 #define FLAG_IGNORE_COMMAS      (1<<5)
  58 #define FLAG_PERIODIC_WAKEUP    (1<<6)
  59
  60 #define CHECK_SPACE(x)          if ((*outpos + x) > outend) { fprintf(stderr, "Not enough space!\n"); return 0; }
  61 #define CHECK_AVAIL(x)          if ((*inpos + x) > inend) { fprintf(stderr, "Not enough input available!\n"); return 0; }
  62
  63 static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int len, int flags)
  64 {
  65         const uint8_t nibble[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
  66                 'A', 'B', 'C', 'D', 'E', 'F'};
  67         uint8_t *buf_out = *outpos;
  68         uint8_t *outend = *outpos + outlen;
  69         uint8_t *inend = *inpos + inlen;
  70         int i;
  71
  72         if (flags & FLAG_COMMA_BEFORE) {
  73                 CHECK_SPACE(1);
  74                 **outpos=',';
  75                 *outpos += 1;
  76         }
  77
  78         if (flags & FLAG_LENGTH_BYTE) {
  79                 CHECK_AVAIL(1);
  80                 len = **inpos;
  81                 *inpos += 1;
  82         }
  83
  84         if (flags & FLAG_FORMAT_HEX) {
  85                 CHECK_AVAIL(len);
  86                 CHECK_SPACE(len*2);
  87                 for (i = 0; i < len; i++) {
  88                         **outpos = nibble[((**inpos) & 0xf0) >> 4];
  89                         *outpos += 1;
  90                         **outpos = nibble[((**inpos) & 0xf)];
  91                         *inpos += 1; *outpos += 1;
  92                 }
  93         } else {
  94                 CHECK_AVAIL(len);
  95                 CHECK_SPACE(len);
  96                 memcpy(*outpos, *inpos, len);
  97                 *outpos += len;
  98                 *inpos += len;
  99         }
 100
 101         if (flags & FLAG_COMMA_AFTER) {
 102                 CHECK_SPACE(1);
 103                 **outpos=',';
 104                 *outpos += 1;
 105         }
 106
 107         if (flags & FLAG_NL) {
 108                 CHECK_SPACE(2);
 109                 **outpos='\r';
 110                 *outpos += 1;
 111                 **outpos='\n';
 112                 *outpos += 1;
 113         }
 114
 115         return *outpos - buf_out;
 116 }
 117
 118 static uint8_t ascii_to_nibble(uint8_t a)
 119 {
 120         uint8_t c = 0x00;
 121
 122         if ((a >= '0') && (a <= '9')) {
 123                 c = a - '0';
 124         } else if ((a >= 'A') && (a <= 'F')) {
 125                 c = (a - 'A') + 10;
 126         } else if ((a >= 'a') && (a <= 'f')) {
 127                 c = (a - 'a') + 10;
 128         }
 129
 130         return c;
 131 }
 132
 133 static int parse_part_in(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int flags)
 134 {
 135         uint8_t *buf_out = *outpos;
 136         uint8_t *outend = *outpos + outlen;
 137         uint8_t *inend = *inpos + inlen;
 138
 139         if (flags & FLAG_LENGTH_BYTE) {
 140                 int len = 0;
 141                 uint8_t *ip;
 142
 143                 ip = *inpos;
 144                 while(ip < inend) {
 145                         if (*ip == ',') {
 146                                 ip++;
 147                                 if (!(flags & FLAG_IGNORE_COMMAS))
 148                                         break;
 149
 150                                 continue;
 151                         }
 152                         len++;
 153                         ip++;
 154                 }
 155                 CHECK_SPACE(1);
 156                 **outpos = (len / 2);
 157                 *outpos += 1;
 158         }
 159
 160         while(*inpos < inend) {
 161                 if (**inpos == ',') {
 162                         *inpos += 1;
 163                         if (!(flags & FLAG_IGNORE_COMMAS))
 164                                 break;
 165
 166                         continue;
 167                 }
 168
 169                 CHECK_SPACE(1);
 170                 CHECK_AVAIL(2);
 171
 172                 **outpos = ascii_to_nibble(**inpos) << 4;
 173                 *inpos += 1;
 174                 **outpos |= ascii_to_nibble(**inpos);
 175                 *inpos += 1; *outpos += 1;
 176         }
 177
 178         return *outpos - buf_out;
 179 }
 180
 181 static int hmlan_format_out(uint8_t *buf, int buf_len, void *data)
 182 {
 183         uint8_t out[1024];
 184         uint8_t *outpos;
 185         uint8_t *inpos;
 186         int fd = *((int*)data);
 187         int w;
 188
 189         if (buf_len < 1)
 190                 return 1;
 191
 192         memset(out, 0, sizeof(out));
 193         outpos = out;
 194         inpos = buf;
 195
 196         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
 197         switch(buf[0]) {
 198                 case 'H':
 199                         if (impersonate_hmlanif) {
 200                                 buf[5] = 'L';
 201                                 buf[6] = 'A';
 202                                 buf[7] = 'N';
 203                         }
 204                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE);
 205                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 206                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE);
 207                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 208                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 209                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 210                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 211
 212                         break;
 213                 case 'E':
 214                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
 215                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 216                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 217                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 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);
 219                         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);
 220
 221                         break;
 222                 case 'R':
 223                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
 224                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 225                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 226                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 227                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 228                         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);
 229
 230                         break;
 231                 case 'I':
 232                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
 233                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 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)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 236
 237                         break;
 238                 default:
 239                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX | FLAG_NL);
 240                         hexdump(buf, buf_len, "Unknown> ");
 241                         break;
 242         }
 243         if (debug)
 244                 fprintf(stderr, "LAN < %s\n", out);
 245
 246         w = write(fd, out, outpos-out);
 247         if (w <= 0) {
 248                 perror("write");
 249                 return 0;
 250         }
 251
 252         return 1;
 253 }
 254
 255 static int hmlan_parse_in(int fd, void *data)
 256 {
 257         struct hmcfgusb_dev *dev = data;
 258         uint8_t buf[1025];
 259         uint8_t out[0x40]; //FIXME!!!
 260         uint8_t *outpos;
 261         uint8_t *inpos;
 262         int i;
 263         int last;
 264         int r;
 265
 266         memset(buf, 0, sizeof(buf));
 267
 268         r = read(fd, buf, sizeof(buf)-1);
 269         if (r > 0) {
 270                 uint8_t *inend = buf + r;
 271
 272                 inpos = buf;
 273
 274                 if (debug)
 275                         fprintf(stderr, "\nLAN > %s", buf);
 276
 277                 while (inpos < inend) {
 278                         uint8_t *instart = inpos;
 279
 280                         if ((*inpos == '\r') || (*inpos == '\n')) {
 281                                 inpos++;
 282                                 continue;
 283                         }
 284
 285                         outpos = out;
 286
 287                         last = inend - inpos;
 288
 289                         for (i = 0; i < last; i++) {
 290                                 if ((inpos[i] == '\r') || (inpos[i] == '\n')) {
 291                                         last = i;
 292                                         break;
 293                                 }
 294                         }
 295
 296                         if (last == 0)
 297                                 continue;
 298
 299                         memset(out, 0, sizeof(out));
 300                         *outpos++ = *inpos++;
 301
 302                         switch(*instart) {
 303                                 case 'S':
 304                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 305                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 306                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 307                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 308                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 309                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
 310                                         break;
 311                                 default:
 312                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
 313                                         break;
 314                         }
 315
 316                         hmcfgusb_send(dev, out, sizeof(out), 1);
 317                 }
 318         } else if (r < 0) {
 319                 perror("read");
 320                 return r;
 321         } else {
 322                 return 0;
 323         }
 324
 325         return 1;
 326 }
 327
 328 static int comm(int fd_in, int fd_out, int master_socket, int flags)
 329 {
 330         struct hmcfgusb_dev *dev;
 331         uint8_t out[0x40]; //FIXME!!!
 332         int poll_timeout = 3600;
 333         int quit = 0;
 334
 335         hmcfgusb_set_debug(debug);
 336
 337         dev = hmcfgusb_init(hmlan_format_out, &fd_out);
 338         if (!dev) {
 339                 fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
 340                 return 0;
 341         }
 342
 343         if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
 344                 fprintf(stderr, "Can't add client to pollfd!\n");
 345                 hmcfgusb_close(dev);
 346                 return 0;
 347         }
 348
 349         if (master_socket >= 0) {
 350                 if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
 351                         fprintf(stderr, "Can't add master_socket to pollfd!\n");
 352                         hmcfgusb_close(dev);
 353                         return 0;
 354                 }
 355         }
 356
 357         if (flags & FLAG_PERIODIC_WAKEUP)
 358                 poll_timeout = 1;
 359
 360         memset(out, 0, sizeof(out));
 361         out[0] = 'K';
 362         hmcfgusb_send(dev, out, sizeof(out), 1);
 363
 364         while(!quit) {
 365                 int fd;
 366
 367                 fd = hmcfgusb_poll(dev, poll_timeout);
 368                 if (fd >= 0) {
 369                         if (fd == master_socket) {
 370                                 int client;
 371
 372                                 client = accept(master_socket, NULL, 0);
 373                                 if (client >= 0) {
 374                                         shutdown(client, SHUT_RDWR);
 375                                         close(client);
 376                                 }
 377                         } else {
 378                                 if (hmlan_parse_in(fd, dev) <= 0) {
 379                                         quit = 1;
 380                                 }
 381                         }
 382                 } else if (fd == -1) {
 383                         if (errno) {
 384                                 perror("hmcfgusb_poll");
 385                                 quit = 1;
 386                         } else {
 387                                 /* periodically wakeup the device */
 388                                 hmcfgusb_send_null_frame(dev);
 389                         }
 390                 }
 391         }
 392
 393         hmcfgusb_close(dev);
 394         return 1;
 395 }
 396
 397 void sigterm_handler(int sig)
 398 {
 399         if (unlink(PID_FILE) == -1)
 400                 perror("Can't remove PID file");
 401
 402         exit(EXIT_SUCCESS);
 403 }
 404
 405 #define FLAG_DAEMON     (1 << 0)
 406 #define FLAG_PID_FILE   (1 << 1)
 407
 408 static int socket_server(char *iface, int port, int flags)
 409 {
 410         struct sigaction sact;
 411         struct sockaddr_in sin;
 412         int sock;
 413         int n;
 414         pid_t pid;
 415
 416         if (flags & FLAG_DAEMON) {
 417                 FILE *pidfile = NULL;
 418
 419                 if (flags & FLAG_PID_FILE) {
 420                         int fd;
 421
 422                         fd = open(PID_FILE, O_CREAT | O_EXCL | O_WRONLY, 0644);
 423                         if (fd == -1) {
 424                                 if (errno == EEXIST) {
 425                                         pid_t old_pid;
 426                                         pidfile = fopen(PID_FILE, "r");
 427                                         if (!pidfile) {
 428                                                 perror("PID file " PID_FILE " already exists, already running?");
 429                                                 exit(EXIT_FAILURE);
 430                                         }
 431
 432                                         if (fscanf(pidfile, "%u", &old_pid) != 1) {
 433                                                 fclose(pidfile);
 434                                                 fprintf(stderr, "Can't read old PID from " PID_FILE ", already running?\n");
 435                                                 exit(EXIT_FAILURE);
 436                                         }
 437
 438                                         fclose(pidfile);
 439
 440                                         fprintf(stderr, "Already running with PID %u according to " PID_FILE "!\n", old_pid);
 441                                         exit(EXIT_FAILURE);
 442                                 }
 443                                 perror("Can't create PID file " PID_FILE);
 444                                 exit(EXIT_FAILURE);
 445                         }
 446
 447                         pidfile = fdopen(fd, "w");
 448                         if (!pidfile) {
 449                                 perror("Can't reopen PID file fd");
 450                                 exit(EXIT_FAILURE);
 451                         }
 452
 453                         memset(&sact, 0, sizeof(sact));
 454                         sact.sa_handler = sigterm_handler;
 455
 456                         if (sigaction(SIGTERM, &sact, NULL) == -1) {
 457                                 perror("sigaction(SIGTERM)");
 458                                 exit(EXIT_FAILURE);
 459                         }
 460                 }
 461
 462                 pid = fork();
 463                 if (pid > 0) {
 464                         if (pidfile) {
 465                                 fprintf(pidfile, "%u\n", pid);
 466                                 fclose(pidfile);
 467                         }
 468
 469                         printf("Daemon with PID %u started!\n", pid);
 470                         exit(EXIT_SUCCESS);
 471                 } else if (pid < 0) {
 472                         perror("fork");
 473                         exit(EXIT_FAILURE);
 474                 }
 475
 476                 if (pidfile)
 477                         fclose(pidfile);
 478         }
 479
 480         memset(&sact, 0, sizeof(sact));
 481         sact.sa_handler = SIG_IGN;
 482
 483         if (sigaction(SIGPIPE, &sact, NULL) == -1) {
 484                 perror("sigaction(SIGPIPE)");
 485                 exit(EXIT_FAILURE);
 486         }
 487
 488         impersonate_hmlanif = 1;
 489
 490         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 491         if (sock == -1) {
 492                 perror("Can't open socket");
 493                 return EXIT_FAILURE;
 494         }
 495
 496         n = 1;
 497         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
 498                 perror("Can't set socket options");
 499                 return EXIT_FAILURE;
 500         }
 501
 502         memset(&sin, 0, sizeof(sin));
 503         sin.sin_family = AF_INET;
 504         sin.sin_port = htons(port);
 505         if (!iface) {
 506                 sin.sin_addr.s_addr = htonl(INADDR_ANY);
 507         } else {
 508                 if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) {
 509                         perror("inet_ntop");
 510                         return EXIT_FAILURE;
 511                 }
 512         }
 513
 514         if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
 515                 perror("Can't bind socket");
 516                 return EXIT_FAILURE;
 517         }
 518
 519         if (listen(sock, 1) == -1) {
 520                 perror("Can't listen on socket");
 521                 return EXIT_FAILURE;
 522         }
 523
 524         while(1) {
 525                 struct sockaddr_in csin;
 526                 socklen_t csinlen;
 527                 int client;
 528                 in_addr_t client_addr;
 529
 530                 memset(&csin, 0, sizeof(csin));
 531                 csinlen = sizeof(csin);
 532                 client = accept(sock, (struct sockaddr*)&csin, &csinlen);
 533                 if (client == -1) {
 534                         perror("Couldn't accept client");
 535                         continue;
 536                 }
 537
 538                 /* FIXME: getnameinfo... */
 539                 client_addr = ntohl(csin.sin_addr.s_addr);
 540
 541                 if (verbose) {
 542                         printf("Client %d.%d.%d.%d connected!\n",
 543                                         (client_addr & 0xff000000) >> 24,
 544                                         (client_addr & 0x00ff0000) >> 16,
 545                                         (client_addr & 0x0000ff00) >> 8,
 546                                         (client_addr & 0x000000ff));
 547                 }
 548
 549                 comm(client, client, sock, flags);
 550
 551                 shutdown(client, SHUT_RDWR);
 552                 close(client);
 553
 554                 if (verbose) {
 555                         printf("Connection to %d.%d.%d.%d closed!\n",
 556                                         (client_addr & 0xff000000) >> 24,
 557                                         (client_addr & 0x00ff0000) >> 16,
 558                                         (client_addr & 0x0000ff00) >> 8,
 559                                         (client_addr & 0x000000ff));
 560                 }
 561
 562         }
 563
 564         return EXIT_SUCCESS;
 565 }
 566
 567 static int interactive_server(int flags)
 568 {
 569         if (!comm(STDIN_FILENO, STDOUT_FILENO, -1, flags))
 570                 return EXIT_FAILURE;
 571
 572         return EXIT_SUCCESS;
 573 }
 574
 575 void hmlan_syntax(char *prog)
 576 {
 577         fprintf(stderr, "Syntax: %s options\n\n", prog);
 578         fprintf(stderr, "Possible options:\n");
 579         fprintf(stderr, "\t-D\tdebug mode\n");
 580         fprintf(stderr, "\t-d\tdaemon mode\n");
 581         fprintf(stderr, "\t-h\tthis help\n");
 582         fprintf(stderr, "\t-i\tinteractive mode (connect HM-CFG-USB to terminal)\n");
 583         fprintf(stderr, "\t-l ip\tlisten on given IP address only (for example 127.0.0.1)\n");
 584         fprintf(stderr, "\t-P\tcreate PID file " PID_FILE " in daemon mode\n");
 585         fprintf(stderr, "\t-p n\tlisten on port n (default 1000)\n");
 586         fprintf(stderr, "\t-R\twakeup the device (and USB-bus) every second (fix for e.g. Raspberry Pi)\n");
 587         fprintf(stderr, "\t-v\tverbose mode\n");
 588
 589 }
 590
 591 int main(int argc, char **argv)
 592 {
 593         int port = 1000;
 594         char *iface = NULL;
 595         int interactive = 0;
 596         int flags = 0;
 597         char *ep;
 598         int opt;
 599
 600         while((opt = getopt(argc, argv, "DdhiPp:Rl:v")) != -1) {
 601                 switch (opt) {
 602                         case 'D':
 603                                 debug = 1;
 604                                 verbose = 1;
 605                                 break;
 606                         case 'd':
 607                                 flags |= FLAG_DAEMON;
 608                                 break;
 609                         case 'i':
 610                                 interactive = 1;
 611                                 break;
 612                         case 'P':
 613                                 flags |= FLAG_PID_FILE;
 614                                 break;
 615                         case 'p':
 616                                 port = strtoul(optarg, &ep, 10);
 617                                 if (*ep != '\0') {
 618                                         fprintf(stderr, "Can't parse port!\n");
 619                                         exit(EXIT_FAILURE);
 620                                 }
 621                                 break;
 622                         case 'R':
 623                                 flags |= FLAG_PERIODIC_WAKEUP;
 624                                 break;
 625                         case 'l':
 626                                 iface = optarg;
 627                                 break;
 628                         case 'v':
 629                                 verbose = 1;
 630                                 break;
 631                         case 'h':
 632                         case ':':
 633                         case '?':
 634                         default:
 635                                 hmlan_syntax(argv[0]);
 636                                 exit(EXIT_FAILURE);
 637                                 break;
 638                 }
 639         }
 640
 641         if (interactive) {
 642                 return interactive_server(flags);
 643         } else {
 644                 return socket_server(iface, port, flags);
 645         }
 646 }