| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: unetcfg.c,v 1.2 2001/02/03 18:39:59 mdw Exp $ |
| 4 | * |
| 5 | * User-space network device support. |
| 6 | * |
| 7 | * (c) 1998 Mark Wooding |
| 8 | */ |
| 9 | |
| 10 | /*----- Licensing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This file is part of Usernet. |
| 13 | * |
| 14 | * Usernet is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or |
| 17 | * (at your option) any later version. |
| 18 | * |
| 19 | * Usernet is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with Usernet; if not, write to the Free Software Foundation, |
| 26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 27 | */ |
| 28 | |
| 29 | /*----- Revision history --------------------------------------------------* |
| 30 | * |
| 31 | * $Log: unetcfg.c,v $ |
| 32 | * Revision 1.2 2001/02/03 18:39:59 mdw |
| 33 | * Setting the maximum interface count now does the right thing. |
| 34 | * |
| 35 | * Revision 1.1 2001/01/25 22:03:39 mdw |
| 36 | * Initial check-in (somewhat belated). |
| 37 | * |
| 38 | */ |
| 39 | |
| 40 | /*----- Include files -----------------------------------------------------*/ |
| 41 | |
| 42 | #include <errno.h> |
| 43 | #include <getopt.h> |
| 44 | #include <stdarg.h> |
| 45 | #include <stdio.h> |
| 46 | #include <stdlib.h> |
| 47 | #include <string.h> |
| 48 | |
| 49 | #include <linux/if_ether.h> |
| 50 | |
| 51 | #include <sys/types.h> |
| 52 | #include <sys/time.h> |
| 53 | #include <sys/ioctl.h> |
| 54 | |
| 55 | #include <fcntl.h> |
| 56 | #include <unistd.h> |
| 57 | |
| 58 | #include "unet.h" |
| 59 | |
| 60 | /*----- Static variables --------------------------------------------------*/ |
| 61 | |
| 62 | #define VERSION "1.00" |
| 63 | #define ETH_P_HELP 0xffffu |
| 64 | |
| 65 | static const char *quis = "unetcfg"; /* My program's name */ |
| 66 | static int flags = 0; /* Various useful status flags */ |
| 67 | static const char *current = "<stdin>"; /* Current Usernet device */ |
| 68 | static int fd = 0; /* Default to @stdin@ */ |
| 69 | |
| 70 | #define f_verbose 1u |
| 71 | #define f_duff 2u |
| 72 | #define f_check 4u |
| 73 | #define f_close 8u |
| 74 | |
| 75 | /*----- Common routines ---------------------------------------------------*/ |
| 76 | |
| 77 | /* --- @die@ --- * |
| 78 | * |
| 79 | * Arguments: @const char *format@ = format string to print |
| 80 | * @...@ = values for the placeholders |
| 81 | * |
| 82 | * Returns: Doesn't |
| 83 | * |
| 84 | * Use: Reports a fatal error message. |
| 85 | */ |
| 86 | |
| 87 | static void die(const char *format, ...) |
| 88 | { |
| 89 | va_list ap; |
| 90 | va_start(ap, format); |
| 91 | fputs(quis, stderr); |
| 92 | fputs(": ", stderr); |
| 93 | vfprintf(stderr, format, ap); |
| 94 | fputc('\n', stderr); |
| 95 | va_end(ap); |
| 96 | exit(EXIT_FAILURE); |
| 97 | } |
| 98 | |
| 99 | /* --- @whiiter@ --- * |
| 100 | * |
| 101 | * Arguments: @const char *format@ = format string to print |
| 102 | * @...@ = values for the placeholders |
| 103 | * |
| 104 | * Returns: Doesn't |
| 105 | * |
| 106 | * Use: Reports a non-fatal error message. |
| 107 | */ |
| 108 | |
| 109 | static void whitter(const char *format, ...) |
| 110 | { |
| 111 | va_list ap; |
| 112 | |
| 113 | if ((flags & f_verbose) == 0) |
| 114 | return; |
| 115 | |
| 116 | va_start(ap, format); |
| 117 | fputs(quis, stderr); |
| 118 | fputs(": ", stderr); |
| 119 | vfprintf(stderr, format, ap); |
| 120 | fputc('\n', stderr); |
| 121 | va_end(ap); |
| 122 | } |
| 123 | |
| 124 | /* --- @lookup@ --- * |
| 125 | * |
| 126 | * Arguments: @void *p@ = pointer to a table |
| 127 | * @size_t sz@ = size of the table items |
| 128 | * @const char *s@ = pointer to string to match |
| 129 | * |
| 130 | * Returns: Pointer to the matching block. |
| 131 | * |
| 132 | * Use: Finds an item in a table. |
| 133 | */ |
| 134 | |
| 135 | static void *lookup(const void *p, size_t sz, const char *s) |
| 136 | { |
| 137 | const char **q = (const char **)p; |
| 138 | const void *e = 0; |
| 139 | |
| 140 | while (*q) { |
| 141 | const char *x = *q, *y = s; |
| 142 | |
| 143 | for (;;) { |
| 144 | if (!*y) { |
| 145 | if (!*x) |
| 146 | return ((void *)q); |
| 147 | if (e) |
| 148 | die("ambiguous name `%s'", s); |
| 149 | e = q; |
| 150 | break; |
| 151 | } else if (*x == *y) { |
| 152 | x++; |
| 153 | y++; |
| 154 | continue; |
| 155 | } else |
| 156 | break; |
| 157 | } |
| 158 | q = (const char **)((const char *)q + sz); |
| 159 | } |
| 160 | return ((void *)e); |
| 161 | } |
| 162 | |
| 163 | #define LOOKUP(tbl, key) lookup((tbl), sizeof((tbl)[0]), (key)) |
| 164 | |
| 165 | /* --- @check@ --- * |
| 166 | * |
| 167 | * Arguments: --- |
| 168 | * |
| 169 | * Returns: --- |
| 170 | * |
| 171 | * Use: Ensures that the current device really is a Usernet device. |
| 172 | */ |
| 173 | |
| 174 | static void check(void) |
| 175 | { |
| 176 | if (flags & f_check) |
| 177 | return; |
| 178 | if (ioctl(fd, UNIOCGINFO, 0) < 0) |
| 179 | die("file `%s' is not a Usernet device", current); |
| 180 | flags |= f_check; |
| 181 | } |
| 182 | |
| 183 | /*----- Command implementations -------------------------------------------*/ |
| 184 | |
| 185 | /* --- Forward declarations --- */ |
| 186 | |
| 187 | struct command { |
| 188 | const char *cmd; /* Command name */ |
| 189 | int minarg; /* Minimum number of args */ |
| 190 | int (*func)(char **av); /* Command handler function */ |
| 191 | const char *syn, *shelp, *vhelp; /* Short and verbose help */ |
| 192 | }; |
| 193 | |
| 194 | static struct command cmdtab[]; |
| 195 | |
| 196 | struct eth_proto { |
| 197 | const char *name; /* User-level protocol name */ |
| 198 | unsigned short proto; /* Protocol number */ |
| 199 | const char *desc; /* Readable description */ |
| 200 | }; |
| 201 | |
| 202 | static struct eth_proto eth_prototab[]; |
| 203 | |
| 204 | #define YNQ_YES 1 |
| 205 | #define YNQ_NO 0 |
| 206 | #define YNQ_QUERY (-1) |
| 207 | |
| 208 | static struct ynq { |
| 209 | const char *s; |
| 210 | int val; |
| 211 | } ynqtab[] = { |
| 212 | { "query", YNQ_QUERY }, |
| 213 | { "show", YNQ_QUERY }, |
| 214 | { "?", YNQ_QUERY }, |
| 215 | { "yes", YNQ_YES }, |
| 216 | { "on", YNQ_YES }, |
| 217 | { "no", YNQ_NO }, |
| 218 | { "off", YNQ_NO }, |
| 219 | { 0, 0 } |
| 220 | }; |
| 221 | |
| 222 | static int run(char **av); |
| 223 | |
| 224 | /* --- @ynq@ --- * |
| 225 | * |
| 226 | * Arguments: @const char *p@ = pointer to string to decode |
| 227 | * |
| 228 | * Returns: One of the @YNQ@ codes. |
| 229 | * |
| 230 | * Use: Decodes a `yes/no/query' response. |
| 231 | */ |
| 232 | |
| 233 | static int ynq(const char *p) |
| 234 | { |
| 235 | struct ynq *ynq = LOOKUP(ynqtab, p); |
| 236 | if (!ynq) |
| 237 | die("unknown setting `%s': I understand `on', `off' and `query'", p); |
| 238 | return (ynq->val); |
| 239 | } |
| 240 | |
| 241 | /* --- @cmd_help@ --- */ |
| 242 | |
| 243 | static int cmd_help(char **av) |
| 244 | { |
| 245 | struct command *c; |
| 246 | |
| 247 | if (!*av) { |
| 248 | puts("Commands provided:\n"); |
| 249 | for (c = cmdtab; c->cmd; c++) |
| 250 | printf("%-30s%s\n", c->syn, c->shelp); |
| 251 | } else if ((c = LOOKUP(cmdtab, *av)) == 0) |
| 252 | die("unknown command: `%s'", *av); |
| 253 | else { |
| 254 | fputs(c->syn, stdout); |
| 255 | fputs("\n\n", stdout); |
| 256 | fputs(c->vhelp, stdout); |
| 257 | av++; |
| 258 | } |
| 259 | return (run(av)); |
| 260 | } |
| 261 | |
| 262 | /* --- @cmd_select@ --- */ |
| 263 | |
| 264 | static int cmd_select(char **av) |
| 265 | { |
| 266 | const char *fn = *av++; |
| 267 | if (flags & f_close) { |
| 268 | close(fd); |
| 269 | whitter("closed previous device `%s'", current); |
| 270 | } |
| 271 | fd = open(fn, O_RDWR); |
| 272 | if (fd < 0) |
| 273 | die("couldn't open Usernet device `%s': %s", fn, strerror(errno)); |
| 274 | current = fn; |
| 275 | flags &= ~f_check; |
| 276 | check(); |
| 277 | whitter("opened new device: `%s'", fn); |
| 278 | flags |= f_close; |
| 279 | return (run(av)); |
| 280 | } |
| 281 | |
| 282 | /* --- @cmd_fd@ --- */ |
| 283 | |
| 284 | static int cmd_fd(char **av) |
| 285 | { |
| 286 | const char *p; |
| 287 | static char namebuf[20]; /* XXX Big enough? */ |
| 288 | |
| 289 | static struct { |
| 290 | const char *name; |
| 291 | int fd; |
| 292 | const char *desc; |
| 293 | } *fdp, fdtab[] = { |
| 294 | { "stdin", 0, "<stdin>" }, |
| 295 | { "stdout", 1, "<stdout>" }, |
| 296 | { "stderr", 2, "<stderr>" }, |
| 297 | { 0, 0, 0 } |
| 298 | }; |
| 299 | |
| 300 | if (flags & f_close) { |
| 301 | close(fd); |
| 302 | whitter("closed previous device `%s'", current); |
| 303 | } |
| 304 | |
| 305 | p = *av++; |
| 306 | if ((fdp = LOOKUP(fdtab, p)) != 0) |
| 307 | fd = fdp->fd; |
| 308 | else if (sscanf(p, "%i", &fd) < 1 || fd < 0) |
| 309 | die("bad file descriptor name: `%s'", p); |
| 310 | |
| 311 | flags &= ~f_check | f_close; |
| 312 | if (fd < 3) |
| 313 | current = fdtab[fd].desc; |
| 314 | else |
| 315 | current = namebuf, sprintf(namebuf, "<fd %i>", fd); |
| 316 | |
| 317 | check(); |
| 318 | whitter("opened device on `%s'", current); |
| 319 | |
| 320 | return (run(av)); |
| 321 | } |
| 322 | |
| 323 | /* --- @cmd_show@ --- */ |
| 324 | |
| 325 | static int cmd_show(char **av) |
| 326 | { |
| 327 | struct unet_info uni; |
| 328 | const char *af, *proto; |
| 329 | |
| 330 | /* --- Name table for address families --- */ |
| 331 | |
| 332 | static const char *aftab[] = { |
| 333 | "Unspecified", |
| 334 | "Unix file domain (!)", |
| 335 | "Internet (IPv4)", |
| 336 | "Amateur radio AX.25", |
| 337 | "Novell IPX", |
| 338 | "Appletalk", |
| 339 | "Amateur radio NetROM", |
| 340 | "Multiprotocol bridge (!)", |
| 341 | "Reserved (for ATM)", |
| 342 | "Reserved (for X.25)", |
| 343 | "Internet (IPv6)", |
| 344 | }; |
| 345 | |
| 346 | /* --- Name table for Usernet flags --- */ |
| 347 | |
| 348 | static struct { |
| 349 | const char *name; |
| 350 | unsigned int f; |
| 351 | } *flp, fltab[] = { |
| 352 | { "trans", UNIF_TRANS }, |
| 353 | /* @{ "open", UNIF_OPEN }@ -- ignore: this flag always appears on */ |
| 354 | { "debug", UNIF_DEBUG }, |
| 355 | { 0, 0 } |
| 356 | }; |
| 357 | |
| 358 | /* --- Read the attachment information --- */ |
| 359 | |
| 360 | check(); |
| 361 | if (ioctl(fd, UNIOCGINFO, &uni) < 0) |
| 362 | die("couldn't read information about attachment: %s", strerror(errno)); |
| 363 | |
| 364 | /* --- Look the address family up --- */ |
| 365 | |
| 366 | if (uni.uni_family < sizeof(aftab) / sizeof(aftab[0])) |
| 367 | af = aftab[uni.uni_family]; |
| 368 | else |
| 369 | af = "Unknown family"; |
| 370 | |
| 371 | /* --- Look the protocol up --- */ |
| 372 | |
| 373 | { |
| 374 | struct eth_proto *ep; |
| 375 | |
| 376 | proto = "unknown"; |
| 377 | for (ep = eth_prototab; ep->name; ep++) { |
| 378 | if (ep->proto == uni.uni_proto) { |
| 379 | proto = ep->desc; |
| 380 | break; |
| 381 | } |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | /* --- Display appropriate information --- */ |
| 386 | |
| 387 | printf("Interface name: %s\n", uni.uni_ifname); |
| 388 | printf("MTU: %u\n", uni.uni_mtu); |
| 389 | printf("Address family: %s\n", af); |
| 390 | printf("Protocol: %s\n", proto); |
| 391 | printf("Flags:"); |
| 392 | |
| 393 | for (flp = fltab; flp->name; flp++) { |
| 394 | if (uni.uni_flags & flp->f) { |
| 395 | putchar(' '); |
| 396 | fputs(flp->name, stdout); |
| 397 | } |
| 398 | } |
| 399 | putchar('\n'); |
| 400 | |
| 401 | /* --- Done --- */ |
| 402 | |
| 403 | return (run(av)); |
| 404 | } |
| 405 | |
| 406 | /* --- @cmd_ifname@ --- */ |
| 407 | |
| 408 | static int cmd_ifname(char **av) |
| 409 | { |
| 410 | struct unet_info uni; |
| 411 | |
| 412 | check(); |
| 413 | if (ioctl(fd, UNIOCGINFO, &uni) < 0) |
| 414 | die("couldn't read attachment information: %s", strerror(errno)); |
| 415 | puts(uni.uni_ifname); |
| 416 | return (run(av)); |
| 417 | } |
| 418 | |
| 419 | /* --- @cmd_protocol@ --- */ |
| 420 | |
| 421 | static int cmd_protocol(char **av) |
| 422 | { |
| 423 | const char *pn = *av++; |
| 424 | const struct eth_proto *ep; |
| 425 | |
| 426 | if ((ep = LOOKUP(eth_prototab, pn)) == 0) |
| 427 | die("unknown protocol name `%s'", pn); |
| 428 | |
| 429 | if (ep->proto == ETH_P_HELP) { |
| 430 | for (ep = eth_prototab; ep->name; ep++) { |
| 431 | if (ep->proto != ETH_P_HELP) |
| 432 | printf("%s -- %s\n", ep->name, ep->desc); |
| 433 | } |
| 434 | } else { |
| 435 | check(); |
| 436 | if (ioctl(fd, UNIOCSPROTO, ep->proto) < 0) |
| 437 | die("couldn't set protocol `%s': %s", ep->name, strerror(errno)); |
| 438 | whitter("set protocol `%s' for `%s'", ep->name, current); |
| 439 | } |
| 440 | |
| 441 | return (run(av)); |
| 442 | } |
| 443 | |
| 444 | /* --- @cmd_debug@ --- */ |
| 445 | |
| 446 | static int cmd_debug(char **av) |
| 447 | { |
| 448 | check(); |
| 449 | switch (ynq(*av++)) { |
| 450 | |
| 451 | case YNQ_QUERY: { |
| 452 | struct unet_info uni; |
| 453 | |
| 454 | if (ioctl(fd, UNIOCGINFO, &uni)) |
| 455 | die("error reading debug state: %s", strerror(errno)); |
| 456 | printf("debugging for `%s' is %s\n", current, |
| 457 | uni.uni_flags & UNIF_DEBUG ? "enabled" : "disabled"); |
| 458 | } break; |
| 459 | |
| 460 | case YNQ_YES: |
| 461 | if (ioctl(fd, UNIOCSDEBUG, 1) < 0) |
| 462 | die("error setting debug state: %s", strerror(errno)); |
| 463 | whitter("set debugging for `%s'", current); |
| 464 | break; |
| 465 | |
| 466 | case YNQ_NO: |
| 467 | if (ioctl(fd, UNIOCSDEBUG, 0) < 0) |
| 468 | die("error clearing debug state: %s", strerror(errno)); |
| 469 | whitter("cleared debugging for `%s'", current); |
| 470 | break; |
| 471 | } |
| 472 | |
| 473 | return (run(av)); |
| 474 | } |
| 475 | |
| 476 | /* --- @cmd_gdebug@ --- */ |
| 477 | |
| 478 | static int cmd_gdebug(char **av) |
| 479 | { |
| 480 | check(); |
| 481 | switch (ynq(*av++)) { |
| 482 | |
| 483 | case YNQ_QUERY: { |
| 484 | int i = ioctl(fd, UNIOCGGDEBUG); |
| 485 | if (i < 0) |
| 486 | die("error reading global debug state: %s", strerror(errno)); |
| 487 | else |
| 488 | printf("global debugging is %s\n", i ? "enabled" : "disabled"); |
| 489 | } break; |
| 490 | |
| 491 | case YNQ_YES: |
| 492 | if (ioctl(fd, UNIOCSGDEBUG, 1) < 0) |
| 493 | die("error setting global debug state: %s", strerror(errno)); |
| 494 | whitter("set global debugging"); |
| 495 | break; |
| 496 | |
| 497 | case YNQ_NO: |
| 498 | if (ioctl(fd, UNIOCSGDEBUG, 0) < 0) |
| 499 | die("error clearing global debug state: %s", strerror(errno)); |
| 500 | whitter("cleared global debugging"); |
| 501 | break; |
| 502 | } |
| 503 | |
| 504 | return (run(av)); |
| 505 | } |
| 506 | |
| 507 | /* --- @cmd_maxif@ --- */ |
| 508 | |
| 509 | static int cmd_maxif(char **av) |
| 510 | { |
| 511 | check(); |
| 512 | if (!*av) { |
| 513 | int i = ioctl(fd, UNIOCGMAXIF); |
| 514 | if (i < 0) |
| 515 | die("error reading maxif: %s", strerror(errno)); |
| 516 | else |
| 517 | printf("interface maximum is %d\n", i); |
| 518 | } else { |
| 519 | char *p = *av++, *q; |
| 520 | long i = strtol(p, &q, 0); |
| 521 | if (*q) |
| 522 | die("malformed integer: %s", p); |
| 523 | if (ioctl(fd, UNIOCSMAXIF, i)) |
| 524 | die("error setting maxif: %s", strerror(errno)); |
| 525 | } |
| 526 | |
| 527 | return (run(av)); |
| 528 | } |
| 529 | |
| 530 | /* --- @run@ --- * |
| 531 | * |
| 532 | * Arguments: @char **av@ = array of command line arguments |
| 533 | * |
| 534 | * Returns: Zero for success, nonzero for failure |
| 535 | * |
| 536 | * Use: Handles a sequence of commands. |
| 537 | */ |
| 538 | |
| 539 | static int run(char **av) |
| 540 | { |
| 541 | struct command *c; |
| 542 | int i; |
| 543 | |
| 544 | if (!*av) |
| 545 | return (EXIT_SUCCESS); |
| 546 | if ((c = LOOKUP(cmdtab, *av)) == 0) |
| 547 | c = &cmdtab[0]; |
| 548 | else |
| 549 | av++; |
| 550 | if (!c->func) |
| 551 | die("command `%s' not implemented", c->cmd); |
| 552 | for (i = 0; i < c->minarg; i++) { |
| 553 | if (!av[i]) |
| 554 | die("Usage: %s", c->syn); |
| 555 | } |
| 556 | return (c->func(av)); |
| 557 | } |
| 558 | |
| 559 | /* --- The command definition block --- */ |
| 560 | |
| 561 | static struct command cmdtab[] = { |
| 562 | |
| 563 | { "select", 1, cmd_select, |
| 564 | "[select] FILE", "select a Usernet device", "\ |
| 565 | Selects FILE as the current device. Each command acts only on the current\n\ |
| 566 | device. The word `select' may be omitted if desired.\n\ |
| 567 | " }, |
| 568 | |
| 569 | { |
| 570 | "fd", 1, cmd_fd, |
| 571 | "fd NUMBER", "select Usernet device from a file descriptor", "\ |
| 572 | Selects the file descriptor NUMBER as the current device. This allows\n\ |
| 573 | configuration of already existing transient attachments which would\n\ |
| 574 | otherwise be unnecessarily awkward.\n\ |
| 575 | " }, |
| 576 | |
| 577 | { "show", 0, cmd_show, |
| 578 | "show", "show status of device", "\ |
| 579 | Displays status information about the current device.\n\ |
| 580 | " }, |
| 581 | |
| 582 | { "ifname", 0, cmd_ifname, |
| 583 | "ifname", "print attached network interface name", "\ |
| 584 | Displays the name of the network interface attached to the current device.\n\ |
| 585 | This is useful in configuration scripts, for example.\n\ |
| 586 | " }, |
| 587 | |
| 588 | { "protocol", 1, cmd_protocol, |
| 589 | "protocol PROT", "selects PROT as the device's protocol", "\ |
| 590 | Sets PROT as the current device's protocol. All packets received by the\n\ |
| 591 | device are stamped with this protocol tag. To see a list of currently\n\ |
| 592 | known protocols, use the `help' protocol.\n\ |
| 593 | " }, |
| 594 | |
| 595 | { "debug", 1, cmd_debug, |
| 596 | "debug on|off|query", "set attachment debugging state", "\ |
| 597 | Set the current debugging state for the attachment. When debugging is\n\ |
| 598 | enabled, all packets flowing through the attachment are logged, along with\n\ |
| 599 | a large number of other informative messages. Note: the logs generated\n\ |
| 600 | tend to be very large, so don't flood the interface with data while\n\ |
| 601 | debugging is enabled!\n\ |
| 602 | " }, |
| 603 | |
| 604 | { "gdebug", 1, cmd_gdebug, |
| 605 | "gdebug on|off|query", "set global debugging state", "\ |
| 606 | Set the global debugging state for Usernet. This controls the emission\n\ |
| 607 | emission of various non-attachment-specific message. Also, new\n\ |
| 608 | attachments inherit their debug flags from the global flag.\n\ |
| 609 | " }, |
| 610 | |
| 611 | { "maxif", 0, cmd_maxif, |
| 612 | "maxif [MAX]", "set maximum number of interfaces allowed", "\ |
| 613 | Configures the maximum number of interfaces allowed.\n\ |
| 614 | " }, |
| 615 | |
| 616 | { "help", 0, cmd_help, |
| 617 | "help [COMMAND]", "display help about COMMAND", "\ |
| 618 | If COMMAND is given, display help about it. If no COMAMND is specified,\n\ |
| 619 | provide general help.\n\ |
| 620 | " }, |
| 621 | |
| 622 | { 0, 0, 0, 0 } |
| 623 | }; |
| 624 | |
| 625 | /* --- Protocol description table --- */ |
| 626 | |
| 627 | static struct eth_proto eth_prototab[] = { |
| 628 | { "loop", ETH_P_LOOP, "Ethernet loopback" }, |
| 629 | { "echo", ETH_P_ECHO, "Ethernet echo" }, |
| 630 | { "pup", ETH_P_PUP, "Xerox PUP" }, |
| 631 | { "ip", ETH_P_IP, "Internet IP" }, |
| 632 | { "x25", ETH_P_X25, "CCITT X.25" }, |
| 633 | { "arp", ETH_P_ARP, "Address resolution protocol" }, |
| 634 | { "bpq", ETH_P_BPQ, "G8BPQ AX.25" }, |
| 635 | { "dec", ETH_P_DEC, "DEC assigned" }, |
| 636 | { "dna-dl", ETH_P_DNA_DL, "DEC DNA dump/load" }, |
| 637 | { "dna-rcon", ETH_P_DNA_RC, "DEC DNA remote console" }, |
| 638 | { "dna-route", ETH_P_DNA_RT, "DEC DNA routing" }, |
| 639 | { "lat", ETH_P_LAT, "DEC LAT" }, |
| 640 | { "diag", ETH_P_DIAG, "DEC diagnostics" }, |
| 641 | { "cust", ETH_P_CUST, "DEC customer user" }, |
| 642 | { "sca", ETH_P_SCA, "DEC Systems Comminications " |
| 643 | "Architecture" }, |
| 644 | { "rarp", ETH_P_RARP, "Reverse address resolution" }, |
| 645 | { "atalk", ETH_P_ATALK, "Appletalk DDP" }, |
| 646 | { "aarp", ETH_P_AARP, "Appletalk AARP" }, |
| 647 | { "ipx", ETH_P_IPX, "Novell IPX" }, |
| 648 | { "ipv6", ETH_P_IPV6, "Internet IPv6" }, |
| 649 | { "help", ETH_P_HELP, "<magical help token>" }, |
| 650 | { 0, 0, 0 } |
| 651 | }; |
| 652 | |
| 653 | /*----- Informative messages ----------------------------------------------*/ |
| 654 | |
| 655 | /* --- @usage@ --- * |
| 656 | * |
| 657 | * Arguments: @FILE *fp@ = stream to write on |
| 658 | * |
| 659 | * Returns: --- |
| 660 | * |
| 661 | * Use: Displays usage information for the program. |
| 662 | */ |
| 663 | |
| 664 | static void usage(FILE *fp) |
| 665 | { |
| 666 | fprintf(fp, "Usage: %s [-v] command ...\n", quis); |
| 667 | } |
| 668 | |
| 669 | /* --- @version@ --- * |
| 670 | * |
| 671 | * Arguments: --- |
| 672 | * |
| 673 | * Returns: --- |
| 674 | * |
| 675 | * Use: Displays the system's version number. |
| 676 | */ |
| 677 | |
| 678 | static void version(void) |
| 679 | { |
| 680 | printf("%s version %s\n", quis, VERSION); |
| 681 | } |
| 682 | |
| 683 | /* --- @help@ --- * |
| 684 | * |
| 685 | * Arguments: --- |
| 686 | * |
| 687 | * Returns: Doesn't |
| 688 | * |
| 689 | * Use: Displays some help and quits. |
| 690 | */ |
| 691 | |
| 692 | static void help(void) |
| 693 | { |
| 694 | struct command *c; |
| 695 | version(); |
| 696 | putchar('\n'); |
| 697 | usage(stdout); |
| 698 | putchar('\n'); |
| 699 | puts("Commands provided:\n"); |
| 700 | for (c = cmdtab; c->cmd; c++) |
| 701 | printf("%-30s%s\n", c->syn, c->shelp); |
| 702 | exit(0); |
| 703 | } |
| 704 | |
| 705 | /* --- @main@ --- * |
| 706 | * |
| 707 | * Arguments: @int argc@ = number of command line arguments received |
| 708 | * @char *argv[]@ = pointers to the command line arguments |
| 709 | * |
| 710 | * Returns: Zero for success, nonzero for failure |
| 711 | * |
| 712 | * Use: Dumps and manipulates Usernet attachments. |
| 713 | */ |
| 714 | |
| 715 | int main(int argc, char *argv[]) |
| 716 | { |
| 717 | /* --- Set the program name properly --- */ |
| 718 | |
| 719 | if (argc >= 1) { |
| 720 | if ((quis = strrchr(argv[0], '/')) == 0) |
| 721 | quis = argv[0]; |
| 722 | else |
| 723 | quis++; |
| 724 | } |
| 725 | |
| 726 | /* --- Now start parsing options --- */ |
| 727 | |
| 728 | for (;;) { |
| 729 | int i; |
| 730 | |
| 731 | static struct option opt[] = { |
| 732 | { "help", 0, 0, 'h' }, |
| 733 | { "usage", 0, 0, 'U' }, |
| 734 | { "version", 0, 0, 'V' }, |
| 735 | { "verbose", 0, 0, 'v' }, |
| 736 | { 0, 0, 0, 0 } |
| 737 | }; |
| 738 | |
| 739 | if ((i = getopt_long(argc, argv, "hVv", opt, 0)) < 0) |
| 740 | break; |
| 741 | switch (i) { |
| 742 | case 'h': |
| 743 | help(); |
| 744 | break; |
| 745 | case 'U': |
| 746 | usage(stdout); |
| 747 | exit(0); |
| 748 | break; |
| 749 | case 'V': |
| 750 | version(); |
| 751 | break; |
| 752 | case 'v': |
| 753 | flags |= f_verbose; |
| 754 | break; |
| 755 | default: |
| 756 | flags |= f_duff; |
| 757 | break; |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | if (flags & f_duff) { |
| 762 | usage(stderr); |
| 763 | printf("(Type `%s --help' for more information.)\n", quis); |
| 764 | exit(EXIT_FAILURE); |
| 765 | } |
| 766 | |
| 767 | return (run(argv + optind)); |
| 768 | } |
| 769 | |
| 770 | /*----- That's all, folks -------------------------------------------------*/ |