Map-MBone 26.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
/* Copyright 1999 Pace Micro Technology plc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/* Mapper for connections between MRouteD multicast routers.
 * Written by Pavel Curtis <Pavel@PARC.Xerox.Com>
 *
 * mapper.c,v 3.8.4.3 1998/01/06 01:57:47 fenner Exp
 */

/*
 * Copyright (c) Xerox Corporation 1992. All rights reserved.
 *
 * License is granted to copy, to use, and to make and to use derivative
 * works for research and evaluation purposes, provided that Xerox is
 * acknowledged in all documentation pertaining to any such copy or derivative
 * work. Xerox grants no other licenses expressed or implied. The Xerox trade
 * name should not be used in any advertising without its written permission.
 *
 * XEROX CORPORATION MAKES NO REPRESENTATIONS CONCERNING EITHER THE
 * MERCHANTABILITY OF THIS SOFTWARE OR THE SUITABILITY OF THIS SOFTWARE
 * FOR ANY PARTICULAR PURPOSE.  The software is provided "as is" without
 * express or implied warranty of any kind.
 *
 * These notices must be retained in any copies of any part of this software.
 */

#ifndef lint
static const char rcsid[] =
	"$Id$";
#endif /* not lint */

#include <err.h>
#include <string.h>
ROOL's avatar
ROOL committed
45
#include <sys/types.h>
46 47 48 49 50 51 52 53 54 55 56 57
#include <netdb.h>
#include <sys/time.h>
#include "defs.h"
#include <arpa/inet.h>
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

#ifdef __riscos

58
const char *__progname = "map-mbone";
59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201
static void closesockets(void)
{
    if (igmp_socket >= 0) close(igmp_socket);
}
#endif

#define DEFAULT_TIMEOUT	2	/* How long to wait before retrying requests */
#define DEFAULT_RETRIES 1	/* How many times to ask each router */


/* All IP addresses are stored in the data structure in NET order. */

typedef struct neighbor {
    struct neighbor    *next;
    u_int32		addr;		/* IP address in NET order */
    u_char		metric;		/* TTL cost of forwarding */
    u_char		threshold;	/* TTL threshold to forward */
    u_short		flags;		/* flags on connection */
#define NF_PRESENT 0x8000	/* True if flags are meaningful */
} Neighbor;

typedef struct interface {
    struct interface *next;
    u_int32	addr;		/* IP address of the interface in NET order */
    Neighbor   *neighbors;	/* List of neighbors' IP addresses */
} Interface;

typedef struct node {
    u_int32	addr;		/* IP address of this entry in NET order */
    u_int32	version;	/* which mrouted version is running */
    int		tries;		/* How many requests sent?  -1 for aliases */
    union {
	struct node *alias;		/* If alias, to what? */
	struct interface *interfaces;	/* Else, neighbor data */
    } u;
    struct node *left, *right;
} Node;


Node   *routers = 0;
u_int32	our_addr, target_addr = 0;		/* in NET order */
int	debug = 0;
int	retries = DEFAULT_RETRIES;
int	timeout = DEFAULT_TIMEOUT;
int	show_names = TRUE;
vifi_t  numvifs;		/* to keep loader happy */
				/* (see COPY_TABLES macro called in kern.c) */

Node *			find_node __P((u_int32 addr, Node **ptr));
Interface *		find_interface __P((u_int32 addr, Node *node));
Neighbor *		find_neighbor __P((u_int32 addr, Node *node));
int			main __P((int argc, char *argv[]));
void			ask __P((u_int32 dst));
void			ask2 __P((u_int32 dst));
int			retry_requests __P((Node *node));
char *			inet_name __P((u_int32 addr));
void			print_map __P((Node *node));
char *			graph_name __P((u_int32 addr, char *buf, int len));
void			graph_edges __P((Node *node));
void			elide_aliases __P((Node *node));
void			graph_map __P((void));
int			get_number __P((int *var, int deflt, char ***pargv,
						int *pargc));
u_int32			host_addr __P((char *name));
static void		usage __P((void));


Node *find_node(addr, ptr)
    u_int32 addr;
    Node **ptr;
{
    Node *n = *ptr;

    if (!n) {
	*ptr = n = (Node *) malloc(sizeof(Node));
	n->addr = addr;
	n->version = 0;
	n->tries = 0;
	n->u.interfaces = 0;
	n->left = n->right = 0;
	return n;
    } else if (addr == n->addr)
	return n;
    else if (addr < n->addr)
	return find_node(addr, &(n->left));
    else
	return find_node(addr, &(n->right));
}


Interface *find_interface(addr, node)
    u_int32 addr;
    Node *node;
{
    Interface *ifc;

    for (ifc = node->u.interfaces; ifc; ifc = ifc->next)
	if (ifc->addr == addr)
	    return ifc;

    ifc = (Interface *) malloc(sizeof(Interface));
    ifc->addr = addr;
    ifc->next = node->u.interfaces;
    node->u.interfaces = ifc;
    ifc->neighbors = 0;

    return ifc;
}


Neighbor *find_neighbor(addr, node)
    u_int32 addr;
    Node *node;
{
    Interface *ifc;

    for (ifc = node->u.interfaces; ifc; ifc = ifc->next) {
	Neighbor *nb;

	for (nb = ifc->neighbors; nb; nb = nb->next)
	    if (nb->addr == addr)
		return nb;
    }

    return 0;
}


/*
 * Log errors and other messages to stderr, according to the severity of the
 * message and the current debug level.  For errors of severity LOG_ERR or
 * worse, terminate the program.
 */
#ifdef __STDC__
void
log(int severity, int syserr, char *format, ...)
#else
/*VARARGS3*/
void
log(severity, syserr, format, va_alist)
	int     severity, syserr;
	char   *format;
	va_dcl
Robert Sprowson's avatar
Robert Sprowson committed
202
#endif
203 204 205 206 207 208 209 210 211 212 213 214 215 216
{
	va_list ap;
	char    fmt[100];

    switch (debug) {
	case 0: if (severity > LOG_WARNING) return;
	case 1: if (severity > LOG_NOTICE ) return;
	case 2: if (severity > LOG_INFO   ) return;
	default:
	    fmt[0] = '\0';
	    if (severity == LOG_WARNING)
		strcpy(fmt, "warning - ");
	    strncat(fmt, format, sizeof(fmt)-strlen(fmt));
	    fmt[sizeof(fmt)-1]='\0';
Robert Sprowson's avatar
Robert Sprowson committed
217 218 219 220 221
#ifdef __STDC__
	    va_start(ap, format);
#else
	    va_start(ap);
#endif
222
	    vfprintf(stderr, fmt, ap);
Robert Sprowson's avatar
Robert Sprowson committed
223
	    va_end(ap);
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723
	    if (syserr == 0)
		fprintf(stderr, "\n");
#ifdef __riscos
	    else if (syserr == errno)
		fprintf(stderr, ": %s\n", _inet_err());
#else
	    else if (syserr < sys_nerr)
		fprintf(stderr, ": %s\n", sys_errlist[syserr]);
#endif
	    else
		fprintf(stderr, ": errno %d\n", syserr);
    }

    if (severity <= LOG_ERR)
	exit(1);
}


/*
 * Send a neighbors-list request.
 */
void ask(dst)
    u_int32 dst;
{
    send_igmp(our_addr, dst, IGMP_DVMRP, DVMRP_ASK_NEIGHBORS,
		htonl(MROUTED_LEVEL), 0);
}

void ask2(dst)
    u_int32 dst;
{
    send_igmp(our_addr, dst, IGMP_DVMRP, DVMRP_ASK_NEIGHBORS2,
		htonl(MROUTED_LEVEL), 0);
}


/*
 * Process an incoming group membership report.
 */
void accept_group_report(src, dst, group, r_type)
    u_int32 src, dst, group;
    int r_type;
{
    log(LOG_INFO, 0, "ignoring IGMP group membership report from %s to %s",
	inet_fmt(src, s1), inet_fmt(dst, s2));
}


/*
 * Process an incoming neighbor probe message.
 */
void accept_probe(src, dst, p, datalen, level)
    u_int32 src, dst, level;
    char *p;
    int datalen;
{
    log(LOG_INFO, 0, "ignoring DVMRP probe from %s to %s",
	inet_fmt(src, s1), inet_fmt(dst, s2));
}


/*
 * Process an incoming route report message.
 */
void accept_report(src, dst, p, datalen, level)
    u_int32 src, dst, level;
    char *p;
    int datalen;
{
    log(LOG_INFO, 0, "ignoring DVMRP routing report from %s to %s",
	inet_fmt(src, s1), inet_fmt(dst, s2));
}


/*
 * Process an incoming neighbor-list request message.
 */
void accept_neighbor_request(src, dst)
    u_int32 src, dst;
{
    if (src != our_addr)
	log(LOG_INFO, 0,
	    "ignoring spurious DVMRP neighbor request from %s to %s",
	    inet_fmt(src, s1), inet_fmt(dst, s2));
}

void accept_neighbor_request2(src, dst)
    u_int32 src, dst;
{
    if (src != our_addr)
	log(LOG_INFO, 0,
	    "ignoring spurious DVMRP neighbor request2 from %s to %s",
	    inet_fmt(src, s1), inet_fmt(dst, s2));
}


/*
 * Process an incoming neighbor-list message.
 */
void accept_neighbors(src, dst, p, datalen, level)
    u_int32 src, dst, level;
    u_char *p;
    int datalen;
{
    Node       *node = find_node(src, &routers);

    if (node->tries == 0)	/* Never heard of 'em; must have hit them at */
	node->tries = 1;	/* least once, though...*/
    else if (node->tries == -1)	/* follow alias link */
	node = node->u.alias;

#define GET_ADDR(a) (a = ((u_int32)*p++ << 24), a += ((u_int32)*p++ << 16),\
		     a += ((u_int32)*p++ << 8), a += *p++)

    /* if node is running a recent mrouted, ask for additional info */
    if (level != 0) {
	node->version = level;
	node->tries = 1;
	ask2(src);
	return;
    }

    if (debug > 3) {
	int i;

	fprintf(stderr, "    datalen = %d\n", datalen);
	for (i = 0; i < datalen; i++) {
	    if ((i & 0xF) == 0)
		fprintf(stderr, "   ");
	    fprintf(stderr, " %02x", p[i]);
	    if ((i & 0xF) == 0xF)
		fprintf(stderr, "\n");
	}
	if ((datalen & 0xF) != 0xF)
	    fprintf(stderr, "\n");
    }

    while (datalen > 0) {	/* loop through interfaces */
	u_int32		ifc_addr;
	u_char		metric, threshold, ncount;
	Node   	       *ifc_node;
	Interface      *ifc;
	Neighbor       *old_neighbors;

	if (datalen < 4 + 3) {
	    log(LOG_WARNING, 0, "received truncated interface record from %s",
		inet_fmt(src, s1));
	    return;
	}

	GET_ADDR(ifc_addr);
	ifc_addr = htonl(ifc_addr);
	metric = *p++;
	threshold = *p++;
	ncount = *p++;
	datalen -= 4 + 3;

	/* Fix up any alias information */
	ifc_node = find_node(ifc_addr, &routers);
	if (ifc_node->tries == 0) { /* new node */
	    ifc_node->tries = -1;
	    ifc_node->u.alias = node;
	} else if (ifc_node != node
		   && (ifc_node->tries > 0  ||  ifc_node->u.alias != node)) {
	    /* must merge two hosts' nodes */
	    Interface  *ifc_i, *next_ifc_i;

	    if (ifc_node->tries == -1) {
		Node *tmp = ifc_node->u.alias;

		ifc_node->u.alias = node;
		ifc_node = tmp;
	    }

	    /* Merge ifc_node (foo_i) into node (foo_n) */

	    if (ifc_node->tries > node->tries)
		node->tries = ifc_node->tries;

	    for (ifc_i = ifc_node->u.interfaces; ifc_i; ifc_i = next_ifc_i) {
		Neighbor *nb_i, *next_nb_i, *nb_n;
		Interface *ifc_n = find_interface(ifc_i->addr, node);

		old_neighbors = ifc_n->neighbors;
		for (nb_i = ifc_i->neighbors; nb_i; nb_i = next_nb_i) {
		    next_nb_i = nb_i->next;
		    for (nb_n = old_neighbors; nb_n; nb_n = nb_n->next)
			if (nb_i->addr == nb_n->addr) {
			    if (nb_i->metric != nb_n->metric
				|| nb_i->threshold != nb_n->threshold)
				log(LOG_WARNING, 0,
				    "inconsistent %s for neighbor %s of %s",
				    "metric/threshold",
				    inet_fmt(nb_i->addr, s1),
				    inet_fmt(node->addr, s2));
			    free(nb_i);
			    break;
			}
		    if (!nb_n) { /* no match for this neighbor yet */
			nb_i->next = ifc_n->neighbors;
			ifc_n->neighbors = nb_i;
		    }
		}

		next_ifc_i = ifc_i->next;
		free(ifc_i);
	    }

	    ifc_node->tries = -1;
	    ifc_node->u.alias = node;
	}

	ifc = find_interface(ifc_addr, node);
	old_neighbors = ifc->neighbors;

	/* Add the neighbors for this interface */
	while (ncount--) {
	    u_int32 	neighbor;
	    Neighbor   *nb;
	    Node       *n_node;

	    if (datalen < 4) {
		log(LOG_WARNING, 0, "received truncated neighbor list from %s",
		    inet_fmt(src, s1));
		return;
	    }

	    GET_ADDR(neighbor);
	    neighbor = htonl(neighbor);
	    datalen -= 4;

	    for (nb = old_neighbors; nb; nb = nb->next)
		if (nb->addr == neighbor) {
		    if (metric != nb->metric || threshold != nb->threshold)
			log(LOG_WARNING, 0,
			    "inconsistent %s for neighbor %s of %s",
			    "metric/threshold",
			    inet_fmt(nb->addr, s1), inet_fmt(node->addr, s2));
		    goto next_neighbor;
		}

	    nb = (Neighbor *) malloc(sizeof(Neighbor));
	    nb->next = ifc->neighbors;
	    ifc->neighbors = nb;
	    nb->addr = neighbor;
	    nb->metric = metric;
	    nb->threshold = threshold;
	    nb->flags = 0;

	    n_node = find_node(neighbor, &routers);
	    if (n_node->tries == 0  &&  !target_addr) { /* it's a new router */
		ask(neighbor);
		n_node->tries = 1;
	    }

	  next_neighbor: ;
	}
    }
}

void accept_neighbors2(src, dst, p, datalen, level)
    u_int32 src, dst, level;
    u_char *p;
    int datalen;
{
    Node       *node = find_node(src, &routers);
    u_int broken_cisco = ((level & 0xffff) == 0x020a); /* 10.2 */
    /* well, only possibly_broken_cisco, but that's too long to type. */

    if (node->tries == 0)	/* Never heard of 'em; must have hit them at */
	node->tries = 1;	/* least once, though...*/
    else if (node->tries == -1)	/* follow alias link */
	node = node->u.alias;

    while (datalen > 0) {	/* loop through interfaces */
	u_int32		ifc_addr;
	u_char		metric, threshold, ncount, flags;
	Node   	       *ifc_node;
	Interface      *ifc;
	Neighbor       *old_neighbors;

	if (datalen < 4 + 4) {
	    log(LOG_WARNING, 0, "received truncated interface record from %s",
		inet_fmt(src, s1));
	    return;
	}

	ifc_addr = *(u_int32*)p;
	p += 4;
	metric = *p++;
	threshold = *p++;
	flags = *p++;
	ncount = *p++;
	datalen -= 4 + 4;

	if (broken_cisco && ncount == 0)	/* dumb Ciscos */
		ncount = 1;
	if (broken_cisco && ncount > 15)	/* dumb Ciscos */
		ncount = ncount & 0xf;

	/* Fix up any alias information */
	ifc_node = find_node(ifc_addr, &routers);
	if (ifc_node->tries == 0) { /* new node */
	    ifc_node->tries = -1;
	    ifc_node->u.alias = node;
	} else if (ifc_node != node
		   && (ifc_node->tries > 0  ||  ifc_node->u.alias != node)) {
	    /* must merge two hosts' nodes */
	    Interface  *ifc_i, *next_ifc_i;

	    if (ifc_node->tries == -1) {
		Node *tmp = ifc_node->u.alias;

		ifc_node->u.alias = node;
		ifc_node = tmp;
	    }

	    /* Merge ifc_node (foo_i) into node (foo_n) */

	    if (ifc_node->tries > node->tries)
		node->tries = ifc_node->tries;

	    for (ifc_i = ifc_node->u.interfaces; ifc_i; ifc_i = next_ifc_i) {
		Neighbor *nb_i, *next_nb_i, *nb_n;
		Interface *ifc_n = find_interface(ifc_i->addr, node);

		old_neighbors = ifc_n->neighbors;
		for (nb_i = ifc_i->neighbors; nb_i; nb_i = next_nb_i) {
		    next_nb_i = nb_i->next;
		    for (nb_n = old_neighbors; nb_n; nb_n = nb_n->next)
			if (nb_i->addr == nb_n->addr) {
			    if (nb_i->metric != nb_n->metric
				|| nb_i->threshold != nb_i->threshold)
				log(LOG_WARNING, 0,
				    "inconsistent %s for neighbor %s of %s",
				    "metric/threshold",
				    inet_fmt(nb_i->addr, s1),
				    inet_fmt(node->addr, s2));
			    free(nb_i);
			    break;
			}
		    if (!nb_n) { /* no match for this neighbor yet */
			nb_i->next = ifc_n->neighbors;
			ifc_n->neighbors = nb_i;
		    }
		}

		next_ifc_i = ifc_i->next;
		free(ifc_i);
	    }

	    ifc_node->tries = -1;
	    ifc_node->u.alias = node;
	}

	ifc = find_interface(ifc_addr, node);
	old_neighbors = ifc->neighbors;

	/* Add the neighbors for this interface */
	while (ncount-- && datalen > 0) {
	    u_int32 	neighbor;
	    Neighbor   *nb;
	    Node       *n_node;

	    if (datalen < 4) {
		log(LOG_WARNING, 0, "received truncated neighbor list from %s",
		    inet_fmt(src, s1));
		return;
	    }

	    neighbor = *(u_int32*)p;
	    p += 4;
	    datalen -= 4;
	    if (neighbor == 0)
		/* make leaf nets point to themselves */
		neighbor = ifc_addr;

	    for (nb = old_neighbors; nb; nb = nb->next)
		if (nb->addr == neighbor) {
		    if (metric != nb->metric || threshold != nb->threshold)
			log(LOG_WARNING, 0,
			    "inconsistent %s for neighbor %s of %s",
			    "metric/threshold",
			    inet_fmt(nb->addr, s1), inet_fmt(node->addr, s2));
		    goto next_neighbor;
		}

	    nb = (Neighbor *) malloc(sizeof(Neighbor));
	    nb->next = ifc->neighbors;
	    ifc->neighbors = nb;
	    nb->addr = neighbor;
	    nb->metric = metric;
	    nb->threshold = threshold;
	    nb->flags = flags | NF_PRESENT;

	    n_node = find_node(neighbor, &routers);
	    if (n_node->tries == 0  &&  !target_addr) { /* it's a new router */
		ask(neighbor);
		n_node->tries = 1;
	    }

	  next_neighbor: ;
	}
    }
}


void check_vif_state()
{
    log(LOG_NOTICE, 0, "network marked down...");
}


int retry_requests(node)
    Node *node;
{
    int	result;

    if (node) {
	result = retry_requests(node->left);
	if (node->tries > 0  &&  node->tries < retries) {
	    if (node->version)
		ask2(node->addr);
	    else
		ask(node->addr);
	    node->tries++;
	    result = 1;
	}
	return retry_requests(node->right) || result;
    } else
	return 0;
}


char *inet_name(addr)
    u_int32 addr;
{
    struct hostent *e;

    e = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET);

    return e ? e->h_name : 0;
}


void print_map(node)
    Node *node;
{
    if (node) {
	char *name, *addr;

	print_map(node->left);

	addr = inet_fmt(node->addr, s1);
	if (!target_addr
	    || (node->tries >= 0 && node->u.interfaces)
	    || (node->tries == -1
		&& node->u.alias->tries >= 0
		&& node->u.alias->u.interfaces)) {
	    if (show_names && (name = inet_name(node->addr)))
		printf("%s (%s):", addr, name);
	    else
		printf("%s:", addr);
	    if (node->tries < 0)
		printf(" alias for %s\n\n", inet_fmt(node->u.alias->addr, s1));
	    else if (!node->u.interfaces)
		printf(" no response to query\n\n");
	    else {
		Interface *ifc;

		if (node->version)
		    printf(" <v%d.%d>", node->version & 0xff,
					(node->version >> 8) & 0xff);
		printf("\n");
		for (ifc = node->u.interfaces; ifc; ifc = ifc->next) {
		    Neighbor *nb;
		    char *ifc_name = inet_fmt(ifc->addr, s1);
		    int ifc_len = strlen(ifc_name);
		    int count = 0;

		    printf("    %s:", ifc_name);
		    for (nb = ifc->neighbors; nb; nb = nb->next) {
			if (count > 0)
			    printf("%*s", ifc_len + 5, "");
			printf("  %s", inet_fmt(nb->addr, s1));
			if (show_names  &&  (name = inet_name(nb->addr)))
			    printf(" (%s)", name);
			printf(" [%d/%d", nb->metric, nb->threshold);
			if (nb->flags) {
			    u_short flags = nb->flags;
			    if (flags & DVMRP_NF_TUNNEL)
				    printf("/tunnel");
			    if (flags & DVMRP_NF_SRCRT)
				    printf("/srcrt");
			    if (flags & DVMRP_NF_QUERIER)
				    printf("/querier");
			    if (flags & DVMRP_NF_DISABLED)
				    printf("/disabled");
			    if (flags & DVMRP_NF_DOWN)
				    printf("/down");
724 725
			    if (flags & DVMRP_NF_LEAF)
				    printf("/leaf");
726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771
			}
                        printf("]\n");
			count++;
		    }
		}
		printf("\n");
	    }
	}
	print_map(node->right);
    }
}


char *graph_name(addr, buf, len)
    u_int32 addr;
    char *buf;
    int len;
{
    char *name;

    if (len < sizeof("255.255.255.255")) {
	fprintf(stderr,
"Buffer too small in graph_name, provided %d bytes, but needed %d.\n",
	    len, sizeof("255.255.255.255"));
	return NULL;
    }
    if (show_names  &&  (name = inet_name(addr))) {
	strncpy(buf, name, len - 1);
	buf[len - 1] = '\0';
    } else
	inet_fmt(addr, buf);

    return buf;
}


void graph_edges(node)
    Node *node;
{
    Interface *ifc;
    Neighbor *nb;
    char name[100];

    if (node) {
	graph_edges(node->left);
	if (node->tries >= 0) {
772 773 774 775 776 777 778 779 780 781
#ifdef GRAPHLET
	    printf("  node [\n"
	           "    id %d\n"
	           "    graphics [\n"
	           "      x %d0.0\n"
	           "      y %d0.0\n"
	           "    ]\n"
	           "    label \"%s%s\"\n"
	           "  ]\n",
#else
782
	    printf("  %d {$ NP %d0 %d0 $} \"%s%s\" \n",
783
#endif
784 785 786 787 788 789 790 791 792 793 794 795 796 797 798
		   (int) node->addr,
		   node->addr & 0xFF, (node->addr >> 8) & 0xFF,
		   graph_name(node->addr, name, sizeof(name)),
		   node->u.interfaces ? "" : "*");
	    for (ifc = node->u.interfaces; ifc; ifc = ifc->next)
		for (nb = ifc->neighbors; nb; nb = nb->next) {
		    Node *nb_node = find_node(nb->addr, &routers);
		    Neighbor *nb2;

		    if (nb_node->tries < 0)
			nb_node = nb_node->u.alias;

		    if (node != nb_node &&
			(!(nb2 = find_neighbor(node->addr, nb_node))
			 || node->addr < nb_node->addr)) {
799 800 801 802 803 804 805 806
#ifdef GRAPHLET
			printf("  edge [\n"
			       "    source %d\n"
			       "    target %d\n"
			       "    label \"%d/%d",
			       node->addr, nb_node->addr,
			       nb->metric, nb->threshold);
#else
807 808
			printf("    %d \"%d/%d",
			       nb_node->addr, nb->metric, nb->threshold);
809
#endif
810 811 812 813 814 815 816 817
			if (nb2 && (nb2->metric != nb->metric
				    || nb2->threshold != nb->threshold))
			    printf(",%d/%d", nb2->metric, nb2->threshold);
			if (nb->flags & NF_PRESENT)
			    printf("%s%s",
				   nb->flags & DVMRP_NF_SRCRT ? "" :
				   nb->flags & DVMRP_NF_TUNNEL ? "E" : "P",
				   nb->flags & DVMRP_NF_DOWN ? "D" : "");
818 819 820 821
#ifdef GRAPHLET
			printf("\"\n"
			       "  ]\n");
#else
822
			printf("\"\n");
823
#endif
824 825
		    }
		}
826
#ifndef GRAPHLET
827
	    printf("    ;\n");
828
#endif
829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863
	}
	graph_edges(node->right);
    }
}

void elide_aliases(node)
    Node *node;
{
    if (node) {
	elide_aliases(node->left);
	if (node->tries >= 0) {
	    Interface *ifc;

	    for (ifc = node->u.interfaces; ifc; ifc = ifc->next) {
		Neighbor *nb;

		for (nb = ifc->neighbors; nb; nb = nb->next) {
		    Node *nb_node = find_node(nb->addr, &routers);

		    if (nb_node->tries < 0)
			nb->addr = nb_node->u.alias->addr;
		}
	    }
	}
	elide_aliases(node->right);
    }
}

void graph_map()
{
    time_t now = time(0);
    char *nowstr = ctime(&now);

    nowstr[24] = '\0';		/* Kill the newline at the end */
    elide_aliases(routers);
864 865 866 867 868
#ifdef GRAPHLET
    printf("graph [\n"
           "  label \"Multicast Router Connectivity: %s\"\n",
	   nowstr);
#else
869 870
    printf("GRAPH \"Multicast Router Connectivity: %s\" = UNDIRECTED\n",
	   nowstr);
871
#endif
872
    graph_edges(routers);
873 874 875
#ifdef GRAPHLET
    printf("]\n");
#else
876
    printf("END\n");
877
#endif
878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067
}


int get_number(var, deflt, pargv, pargc)
    int *var, *pargc, deflt;
    char ***pargv;
{
    if ((*pargv)[0][2] == '\0') { /* Get the value from the next argument */
	if (*pargc > 1  &&  isdigit((*pargv)[1][0])) {
	    (*pargv)++, (*pargc)--;
	    *var = atoi((*pargv)[0]);
	    return 1;
	} else if (deflt >= 0) {
	    *var = deflt;
	    return 1;
	} else
	    return 0;
    } else {			/* Get value from the rest of this argument */
	if (isdigit((*pargv)[0][2])) {
	    *var = atoi((*pargv)[0] + 2);
	    return 1;
	} else {
	    return 0;
	}
    }
}


u_int32 host_addr(name)
    char *name;
{
    struct hostent *e = gethostbyname(name);
    int addr;

    if (e && e->h_length == sizeof(addr))
	memcpy(&addr, e->h_addr_list[0], e->h_length);
    else {
	addr = inet_addr(name);
	if (addr == -1)
	    addr = 0;
    }

    return addr;
}


int main(argc, argv)
    int argc;
    char *argv[];
{
    int flood = FALSE, graph = FALSE;

#ifdef __riscos
    atexit(closesockets);
#else
    if (geteuid() != 0)
	errx(1, "must be root");
#endif

    init_igmp();
    setuid(getuid());

    setlinebuf(stderr);

    argv++, argc--;
    while (argc > 0 && argv[0][0] == '-') {
	switch (argv[0][1]) {
	  case 'd':
	    if (!get_number(&debug, DEFAULT_DEBUG, &argv, &argc))
		usage();
	    break;
	  case 'f':
	    flood = TRUE;
	    break;
	  case 'g':
	    graph = TRUE;
	    break;
	  case 'n':
	    show_names = FALSE;
	    break;
	  case 'r':
	    if (!get_number(&retries, -1, &argv, &argc))
		usage();
	    break;
	  case 't':
	    if (!get_number(&timeout, -1, &argv, &argc))
		usage();
	    break;
	  default:
	    usage();
	}
	argv++, argc--;
    }

    if (argc > 1) {
	usage();
    } else if (argc == 1 && !(target_addr = host_addr(argv[0])))
	errx(2, "unknown host: %s", argv[0]);

    if (debug)
	fprintf(stderr, "Debug level %u\n", debug);

    {				/* Find a good local address for us. */
	int udp;
	struct sockaddr_in addr;
	int addrlen = sizeof(addr);

	addr.sin_family = AF_INET;
#ifdef HAVE_SA_LEN
	addr.sin_len = sizeof addr;
#endif
	addr.sin_addr.s_addr = dvmrp_group;
	addr.sin_port = htons(2000); /* any port over 1024 will do... */
	if ((udp = socket(AF_INET, SOCK_DGRAM, 0)) < 0
	    || connect(udp, (struct sockaddr *) &addr, sizeof(addr)) < 0
	    || getsockname(udp, (struct sockaddr *) &addr, &addrlen) < 0)
#ifdef __riscos
	{
	    if (udp >= 0) close(udp);
	    err(-1, "determining local address");
	}
#else
	    err(-1, "determining local address");
#endif
	close(udp);
	our_addr = addr.sin_addr.s_addr;
    }

    /* Send initial seed message to all local routers */
    ask(target_addr ? target_addr : allhosts_group);

    if (target_addr) {
	Node *n = find_node(target_addr, &routers);

	n->tries = 1;

	if (flood)
	    target_addr = 0;
    }

    /* Main receive loop */
    for(;;) {
	fd_set		fds;
	struct timeval 	tv;
	int 		count, recvlen, dummy = 0;

	FD_ZERO(&fds);
	FD_SET(igmp_socket, &fds);

	tv.tv_sec = timeout;
	tv.tv_usec = 0;

	count = select(igmp_socket + 1, &fds, 0, 0, &tv);

	if (count < 0) {
	    if (errno != EINTR)
		warn("select");
	    continue;
	} else if (count == 0) {
	    log(LOG_DEBUG, 0, "Timed out receiving neighbor lists");
	    if (retry_requests(routers))
		continue;
	    else
		break;
	}

	recvlen = recvfrom(igmp_socket, recv_buf, RECV_BUF_SIZE,
			   0, NULL, &dummy);
	if (recvlen >= 0)
	    accept_igmp(recvlen);
	else if (errno != EINTR)
	    warn("recvfrom");
    }

    printf("\n");

    if (graph)
	graph_map();
    else {
	if (!target_addr)
	    printf("Multicast Router Connectivity:\n\n");
	print_map(routers);
    }

    exit(0);
}

static void
usage()
{
1068 1069 1070 1071 1072 1073 1074 1075 1076
	fprintf(stderr, "Usage:   map-mbone [-f] [-g] [-n] [-t <timeout>] [-r <retries>]\n");
	fprintf(stderr, "                   [-d [debug-level]] [router]\n");
	fprintf(stderr, "         attempts to display all multicast reachable from a router\n");
	fprintf(stderr, "Options: -f  enable flooding option to perform a recursive search\n");
	fprintf(stderr, "         -g  set graphing in GraphEd format\n");
	fprintf(stderr, "         -n  do not attempt to lookup names using DNS\n");
	fprintf(stderr, "         -t  set the retry timeout (default 2s)\n");
	fprintf(stderr, "         -r  set the neighbour retry limit (default 1)\n");
	fprintf(stderr, "         -d  sets the debug level (default 0)\n");
1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
	exit(1);
}

/* dummies */
void accept_prune(src, dst, p, datalen)
	u_int32 src, dst;
	char *p;
	int datalen;
{
}
void accept_graft(src, dst, p, datalen)
	u_int32 src, dst;
	char *p;
	int datalen;
{
}
void accept_g_ack(src, dst, p, datalen)
	u_int32 src, dst;
	char *p;
	int datalen;
{
}
void add_table_entry(origin, mcastgrp)
	u_int32 origin, mcastgrp;
{
}
void accept_leave_message(src, dst, group)
	u_int32 src, dst, group;
{
}
void accept_mtrace(src, dst, group, data, no, datalen)
	u_int32 src, dst, group;
	char *data;
	u_int no;
	int datalen;
{
}
void accept_membership_query(src, dst, group, tmo)
	u_int32 src, dst, group;
	int tmo;
{
}
void accept_info_request(src, dst, p, datalen)
	u_int32 src, dst;
	u_char *p;
	int datalen;
{
}
void accept_info_reply(src, dst, p, datalen)
	u_int32 src, dst;
	u_char *p;
	int datalen;
{
}