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 <netinet/in.h>
  37 #include <arpa/inet.h>
  38 #include <libusb-1.0/libusb.h>
  39
  40 #include "hexdump.h"
  41 #include "hmcfgusb.h"
  42
  43 #define PID_FILE "/var/run/hmland.pid"
  44
  45 extern char *optarg;
  46
  47 static int impersonate_hmlanif = 0;
  48 static int debug = 0;
  49 static int verbose = 0;
  50
  51 #define FLAG_LENGTH_BYTE        (1<<0)
  52 #define FLAG_FORMAT_HEX         (1<<1)
  53 #define FLAG_COMMA_BEFORE       (1<<2)
  54 #define FLAG_COMMA_AFTER        (1<<3)
  55 #define FLAG_NL                 (1<<4)
  56 #define FLAG_IGNORE_COMMAS      (1<<5)
  57
  58 #define CHECK_SPACE(x)          if ((*outpos + x) > outend) { fprintf(stderr, "Not enough space!\n"); return 0; }
  59 #define CHECK_AVAIL(x)          if ((*inpos + x) > inend) { fprintf(stderr, "Not enough input available!\n"); return 0; }
  60
  61 static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int len, int flags)
  62 {
  63         const uint8_t nibble[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
  64                 'A', 'B', 'C', 'D', 'E', 'F'};
  65         uint8_t *buf_out = *outpos;
  66         uint8_t *outend = *outpos + outlen;
  67         uint8_t *inend = *inpos + inlen;
  68         int i;
  69
  70         if (flags & FLAG_COMMA_BEFORE) {
  71                 CHECK_SPACE(1);
  72                 **outpos=',';
  73                 *outpos += 1;
  74         }
  75
  76         if (flags & FLAG_LENGTH_BYTE) {
  77                 CHECK_AVAIL(1);
  78                 len = **inpos;
  79                 *inpos += 1;
  80         }
  81
  82         if (flags & FLAG_FORMAT_HEX) {
  83                 CHECK_AVAIL(len);
  84                 CHECK_SPACE(len*2);
  85                 for (i = 0; i < len; i++) {
  86                         **outpos = nibble[((**inpos) & 0xf0) >> 4];
  87                         *outpos += 1;
  88                         **outpos = nibble[((**inpos) & 0xf)];
  89                         *inpos += 1; *outpos += 1;
  90                 }
  91         } else {
  92                 CHECK_AVAIL(len);
  93                 CHECK_SPACE(len);
  94                 memcpy(*outpos, *inpos, len);
  95                 *outpos += len;
  96                 *inpos += len;
  97         }
  98
  99         if (flags & FLAG_COMMA_AFTER) {
 100                 CHECK_SPACE(1);
 101                 **outpos=',';
 102                 *outpos += 1;
 103         }
 104
 105         if (flags & FLAG_NL) {
 106                 CHECK_SPACE(2);
 107                 **outpos='\r';
 108                 *outpos += 1;
 109                 **outpos='\n';
 110                 *outpos += 1;
 111         }
 112
 113         return *outpos - buf_out;
 114 }
 115
 116 static uint8_t ascii_to_nibble(uint8_t a)
 117 {
 118         uint8_t c = 0x00;
 119
 120         if ((a >= '0') && (a <= '9')) {
 121                 c = a - '0';
 122         } else if ((a >= 'A') && (a <= 'F')) {
 123                 c = (a - 'A') + 10;
 124         } else if ((a >= 'a') && (a <= 'f')) {
 125                 c = (a - 'a') + 10;
 126         }
 127
 128         return c;
 129 }
 130
 131 static int parse_part_in(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int flags)
 132 {
 133         uint8_t *buf_out = *outpos;
 134         uint8_t *outend = *outpos + outlen;
 135         uint8_t *inend = *inpos + inlen;
 136
 137         if (flags & FLAG_LENGTH_BYTE) {
 138                 int len = 0;
 139                 uint8_t *ip;
 140
 141                 ip = *inpos;
 142                 while(ip < inend) {
 143                         if (*ip == ',') {
 144                                 ip++;
 145                                 if (!(flags & FLAG_IGNORE_COMMAS))
 146                                         break;
 147
 148                                 continue;
 149                         }
 150                         len++;
 151                         ip++;
 152                 }
 153                 CHECK_SPACE(1);
 154                 **outpos = (len / 2);
 155                 *outpos += 1;
 156         }
 157
 158         while(*inpos < inend) {
 159                 if (**inpos == ',') {
 160                         *inpos += 1;
 161                         if (!(flags & FLAG_IGNORE_COMMAS))
 162                                 break;
 163
 164                         continue;
 165                 }
 166
 167                 CHECK_SPACE(1);
 168                 CHECK_AVAIL(2);
 169
 170                 **outpos = ascii_to_nibble(**inpos) << 4;
 171                 *inpos += 1;
 172                 **outpos |= ascii_to_nibble(**inpos);
 173                 *inpos += 1; *outpos += 1;
 174         }
 175
 176         return *outpos - buf_out;
 177 }
 178
 179 static int hmlan_format_out(uint8_t *buf, int buf_len, void *data)
 180 {
 181         uint8_t out[1024];
 182         uint8_t *outpos;
 183         uint8_t *inpos;
 184         int fd = *((int*)data);
 185         int w;
 186
 187         if (buf_len < 1)
 188                 return 1;
 189
 190         memset(out, 0, sizeof(out));
 191         outpos = out;
 192         inpos = buf;
 193
 194         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
 195         switch(buf[0]) {
 196                 case 'H':
 197                         if (impersonate_hmlanif) {
 198                                 buf[5] = 'L';
 199                                 buf[6] = 'A';
 200                                 buf[7] = 'N';
 201                         }
 202                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE);
 203                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 204                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE);
 205                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 206                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 207                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 208                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 209
 210                         break;
 211                 case 'E':
 212                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
 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)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 215                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 216                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 217                         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);
 218
 219                         break;
 220                 case 'R':
 221                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
 222                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 223                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 224                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 225                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 226                         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);
 227
 228                         break;
 229                 case 'I':
 230                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
 231                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 232                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
 233                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
 234
 235                         break;
 236                 default:
 237                         format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX | FLAG_NL);
 238                         hexdump(buf, buf_len, "Unknown> ");
 239                         break;
 240         }
 241         if (debug)
 242                 fprintf(stderr, "LAN < %s\n", out);
 243
 244         w = write(fd, out, outpos-out);
 245         if (w <= 0) {
 246                 perror("write");
 247                 return 0;
 248         }
 249
 250         return 1;
 251 }
 252
 253 static int hmlan_parse_in(int fd, void *data)
 254 {
 255         struct hmcfgusb_dev *dev = data;
 256         uint8_t buf[1025];
 257         uint8_t out[0x40]; //FIXME!!!
 258         uint8_t *outpos;
 259         uint8_t *inpos;
 260         int i;
 261         int last;
 262         int r;
 263
 264         memset(buf, 0, sizeof(buf));
 265
 266         r = read(fd, buf, sizeof(buf)-1);
 267         if (r > 0) {
 268                 uint8_t *inend = buf + r;
 269
 270                 inpos = buf;
 271
 272                 if (debug)
 273                         fprintf(stderr, "\nLAN > %s", buf);
 274
 275                 while (inpos < inend) {
 276                         uint8_t *instart = inpos;
 277
 278                         if ((*inpos == '\r') || (*inpos == '\n')) {
 279                                 inpos++;
 280                                 continue;
 281                         }
 282
 283                         outpos = out;
 284
 285                         last = inend - inpos;
 286
 287                         for (i = 0; i < last; i++) {
 288                                 if ((inpos[i] == '\r') || (inpos[i] == '\n')) {
 289                                         last = i;
 290                                         break;
 291                                 }
 292                         }
 293
 294                         if (last == 0)
 295                                 continue;
 296
 297                         memset(out, 0, sizeof(out));
 298                         *outpos++ = *inpos++;
 299
 300                         switch(buf[0]) {
 301                                 case 'S':
 302                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 303                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
 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)), FLAG_LENGTH_BYTE);
 308                                         break;
 309                                 default:
 310                                         parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
 311                                         break;
 312                         }
 313
 314                         hmcfgusb_send(dev, out, sizeof(out), 1);
 315                 }
 316         } else if (r < 0) {
 317                 perror("read");
 318                 return r;
 319         } else {
 320                 return 0;
 321         }
 322
 323         return 1;
 324 }
 325
 326 static int comm(int fd_in, int fd_out, int master_socket)
 327 {
 328         struct hmcfgusb_dev *dev;
 329         int quit = 0;
 330
 331         hmcfgusb_set_debug(debug);
 332
 333         dev = hmcfgusb_init(hmlan_format_out, &fd_out);
 334         if (!dev) {
 335                 fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
 336                 return 0;
 337         }
 338
 339         if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
 340                 fprintf(stderr, "Can't add client to pollfd!\n");
 341                 hmcfgusb_close(dev);
 342                 return 0;
 343         }
 344
 345         if (master_socket >= 0) {
 346                 if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
 347                         fprintf(stderr, "Can't add master_socket to pollfd!\n");
 348                         hmcfgusb_close(dev);
 349                         return 0;
 350                 }
 351         }
 352
 353         hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);
 354
 355         while(!quit) {
 356                 int fd;
 357
 358                 fd = hmcfgusb_poll(dev, 3600);
 359                 if (fd >= 0) {
 360                         if (fd == master_socket) {
 361                                 int client;
 362
 363                                 client = accept(master_socket, NULL, 0);
 364                                 if (client >= 0) {
 365                                         shutdown(client, SHUT_RDWR);
 366                                         close(client);
 367                                 }
 368                         } else {
 369                                 if (hmlan_parse_in(fd, dev) <= 0) {
 370                                         quit = 1;
 371                                 }
 372                         }
 373                 } else if (fd == -1) {
 374                         if (errno) {
 375                                 perror("hmcfgusb_poll");
 376                                 quit = 1;
 377                         }
 378                 }
 379         }
 380
 381         hmcfgusb_close(dev);
 382         return 1;
 383 }
 384
 385 void sigterm_handler(int sig)
 386 {
 387         if (unlink(PID_FILE) == -1)
 388                 perror("Can't remove PID file");
 389
 390         exit(EXIT_SUCCESS);
 391 }
 392
 393 #define FLAG_DAEMON     (1 << 0)
 394 #define FLAG_PID_FILE   (1 << 1)
 395
 396 static int socket_server(char *iface, int port, int flags)
 397 {
 398         struct sigaction sact;
 399         struct sockaddr_in sin;
 400         int sock;
 401         int n;
 402         pid_t pid;
 403
 404         if (flags & FLAG_DAEMON) {
 405                 FILE *pidfile = NULL;
 406
 407                 if (flags & FLAG_PID_FILE) {
 408                         mode_t old_umask;
 409
 410                         old_umask = umask(022);
 411                         pidfile = fopen(PID_FILE, "w");
 412                         umask(old_umask);
 413
 414                         if (!pidfile) {
 415                                 perror("Can't create PID file " PID_FILE);
 416                                 exit(EXIT_FAILURE);
 417                         }
 418
 419                         memset(&sact, 0, sizeof(sact));
 420                         sact.sa_handler = sigterm_handler;
 421
 422                         if (sigaction(SIGTERM, &sact, NULL) == -1) {
 423                                 perror("sigaction(SIGTERM)");
 424                                 exit(EXIT_FAILURE);
 425                         }
 426                 }
 427
 428                 pid = fork();
 429                 if (pid > 0) {
 430                         if (pidfile) {
 431                                 fprintf(pidfile, "%u\n", pid);
 432                                 fclose(pidfile);
 433                         }
 434
 435                         printf("Daemon with PID %u started!\n", pid);
 436                         exit(EXIT_SUCCESS);
 437                 } else if (pid < 0) {
 438                         perror("fork");
 439                         exit(EXIT_FAILURE);
 440                 }
 441
 442                 if (pidfile)
 443                         fclose(pidfile);
 444         }
 445
 446         memset(&sact, 0, sizeof(sact));
 447         sact.sa_handler = SIG_IGN;
 448
 449         if (sigaction(SIGPIPE, &sact, NULL) == -1) {
 450                 perror("sigaction(SIGPIPE)");
 451                 exit(EXIT_FAILURE);
 452         }
 453
 454         impersonate_hmlanif = 1;
 455
 456         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 457         if (sock == -1) {
 458                 perror("Can't open socket");
 459                 return EXIT_FAILURE;
 460         }
 461
 462         n = 1;
 463         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
 464                 perror("Can't set socket options");
 465                 return EXIT_FAILURE;
 466         }
 467
 468         memset(&sin, 0, sizeof(sin));
 469         sin.sin_family = AF_INET;
 470         sin.sin_port = htons(port);
 471         if (!iface) {
 472                 sin.sin_addr.s_addr = htonl(INADDR_ANY);
 473         } else {
 474                 if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) {
 475                         perror("inet_ntop");
 476                         return EXIT_FAILURE;
 477                 }
 478         }
 479
 480         if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
 481                 perror("Can't bind socket");
 482                 return EXIT_FAILURE;
 483         }
 484
 485         if (listen(sock, 1) == -1) {
 486                 perror("Can't listen on socket");
 487                 return EXIT_FAILURE;
 488         }
 489
 490         while(1) {
 491                 struct sockaddr_in csin;
 492                 socklen_t csinlen;
 493                 int client;
 494                 in_addr_t client_addr;
 495
 496                 memset(&csin, 0, sizeof(csin));
 497                 csinlen = sizeof(csin);
 498                 client = accept(sock, (struct sockaddr*)&csin, &csinlen);
 499                 if (client == -1) {
 500                         perror("Couldn't accept client");
 501                         continue;
 502                 }
 503
 504                 /* FIXME: getnameinfo... */
 505                 client_addr = ntohl(csin.sin_addr.s_addr);
 506
 507                 if (verbose) {
 508                         printf("Client %d.%d.%d.%d connected!\n",
 509                                         (client_addr & 0xff000000) >> 24,
 510                                         (client_addr & 0x00ff0000) >> 16,
 511                                         (client_addr & 0x0000ff00) >> 8,
 512                                         (client_addr & 0x000000ff));
 513                 }
 514
 515                 comm(client, client, sock);
 516
 517                 shutdown(client, SHUT_RDWR);
 518                 close(client);
 519
 520                 if (verbose) {
 521                         printf("Connection to %d.%d.%d.%d closed!\n",
 522                                         (client_addr & 0xff000000) >> 24,
 523                                         (client_addr & 0x00ff0000) >> 16,
 524                                         (client_addr & 0x0000ff00) >> 8,
 525                                         (client_addr & 0x000000ff));
 526                 }
 527
 528         }
 529
 530         return EXIT_SUCCESS;
 531 }
 532
 533 static int interactive_server(void)
 534 {
 535         if (!comm(STDIN_FILENO, STDOUT_FILENO, -1))
 536                 return EXIT_FAILURE;
 537
 538         return EXIT_SUCCESS;
 539 }
 540
 541 void hmlan_syntax(char *prog)
 542 {
 543         fprintf(stderr, "Syntax: %s options\n\n", prog);
 544         fprintf(stderr, "Possible options:\n");
 545         fprintf(stderr, "\t-D\tdebug mode\n");
 546         fprintf(stderr, "\t-d\tdaemon mode\n");
 547         fprintf(stderr, "\t-h\tthis help\n");
 548         fprintf(stderr, "\t-i\tinteractive mode (connect HM-CFG-USB to terminal)\n");
 549         fprintf(stderr, "\t-l ip\tlisten on given IP address only (for example 127.0.0.1)\n");
 550         fprintf(stderr, "\t-P\tcreate PID file " PID_FILE " in daemon mode\n");
 551         fprintf(stderr, "\t-p n\tlisten on port n (default 1000)\n");
 552         fprintf(stderr, "\t-v\tverbose mode\n");
 553
 554 }
 555
 556 int main(int argc, char **argv)
 557 {
 558         int port = 1000;
 559         char *iface = NULL;
 560         int interactive = 0;
 561         int flags = 0;
 562         char *ep;
 563         int opt;
 564
 565         while((opt = getopt(argc, argv, "DdhiPp:l:v")) != -1) {
 566                 switch (opt) {
 567                         case 'D':
 568                                 debug = 1;
 569                                 verbose = 1;
 570                                 break;
 571                         case 'd':
 572                                 flags |= FLAG_DAEMON;
 573                                 break;
 574                         case 'i':
 575                                 interactive = 1;
 576                                 break;
 577                         case 'P':
 578                                 flags |= FLAG_PID_FILE;
 579                                 break;
 580                         case 'p':
 581                                 port = strtoul(optarg, &ep, 10);
 582                                 if (*ep != '\0') {
 583                                         fprintf(stderr, "Can't parse port!\n");
 584                                         exit(EXIT_FAILURE);
 585                                 }
 586                                 break;
 587                         case 'l':
 588                                 iface = optarg;
 589                                 break;
 590                         case 'v':
 591                                 verbose = 1;
 592                                 break;
 593                         case 'h':
 594                         case ':':
 595                         case '?':
 596                         default:
 597                                 hmlan_syntax(argv[0]);
 598                                 exit(EXIT_FAILURE);
 599                                 break;
 600                 }
 601         }
 602
 603         if (interactive) {
 604                 return interactive_server();
 605         } else {
 606                 return socket_server(iface, port, flags);
 607         }
 608 }