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