genreport.c 41.6 KB
Newer Older
Mark Andrews's avatar
Mark Andrews committed
1 2 3 4 5 6 7 8
/*
 * Copyright (C) 2016  Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

Mark Andrews's avatar
Mark Andrews committed
9
#include <stdio.h>
Mark Andrews's avatar
Mark Andrews committed
10 11 12 13
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

Mark Andrews's avatar
Mark Andrews committed
14 15 16 17 18 19 20
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/time.h>
21 22
#include <sys/ioctl.h>
#include <sys/uio.h>
Mark Andrews's avatar
Mark Andrews committed
23 24

#include <errno.h>
25
#include <netdb.h>
Mark Andrews's avatar
Mark Andrews committed
26
#include <resolv.h>
Mark Andrews's avatar
Mark Andrews committed
27

28
#define ns_t_rrsig 46
Mark Andrews's avatar
Mark Andrews committed
29 30
#define ns_t_dnskey 48

31
static int eof = 0;
Mark Andrews's avatar
Mark Andrews committed
32 33
static int maxfd = -1;
static fd_set rfds, wfds;
34 35
static int outstanding;
static int maxoutstanding = 100;
Mark Andrews's avatar
Mark Andrews committed
36 37 38 39 40 41

static void(*rhandlers[FD_SETSIZE])(int);
static void(*whandlers[FD_SETSIZE])(int);

static int udp4 = -1;
static int udp6 = -1;
42

43
static int debug = 0;
44
static int what = 0;
45 46 47

static union res_sockaddr_union servers[10];
static int nservers = 0;
Mark Andrews's avatar
Mark Andrews committed
48

Mark Andrews's avatar
Mark Andrews committed
49 50 51
/*
 * Doubly linked list macros.
 */
Mark Andrews's avatar
Mark Andrews committed
52 53 54 55 56 57 58
#define APPEND(list, item, link) do { \
	if ((list).tail) \
		(list).tail->link.next = (item); \
	else \
		(list).head = (item); \
	(item)->link.prev = list.tail; \
	(item)->link.next = NULL; \
59
	(item)->link.linked = 1; \
Mark Andrews's avatar
Mark Andrews committed
60 61 62 63 64 65 66 67 68 69 70 71 72
	(list).tail = (item); \
} while (0)

#define UNLINK(list, item, link) do { \
	if ((item)->link.next) \
		(item)->link.next->link.prev = (item)->link.prev; \
	else \
		list.tail = (item)->link.prev; \
	if ((item)->link.prev) \
		(item)->link.prev->link.next = (item)->link.next; \
	else \
		list.head = (item)->link.next; \
	(item)->link.next = (item)->link.prev = NULL; \
73
	(item)->link.linked = 0; \
Mark Andrews's avatar
Mark Andrews committed
74 75 76 77
} while (0)

#define NEXT(item, link) (item)->link.next
#define PREV(item, link) (item)->link.next
78
#define LINKED(item, link) (item)->link.linked
Mark Andrews's avatar
Mark Andrews committed
79 80 81 82

#define HEAD(list) (list).head
#define TAIL(list) (list).tail

Mark Andrews's avatar
Mark Andrews committed
83 84 85
/*
 * Test groupings
 */
86 87 88 89
#define EDNS 0x0
#define COMM 0x1
#define FULL 0x2

Mark Andrews's avatar
Mark Andrews committed
90
static struct {
Mark Andrews's avatar
Mark Andrews committed
91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108
	const char *name;		/* test nmemonic */
	unsigned int what;		/* select what test to make / report */
	unsigned short rdlen;		/* edns rdata length */
	const char *rdata;		/* edns rdata */
	unsigned short udpsize;		/* edns UDP size (0 == no EDNS) */
	unsigned short flags;		/* edns flags to be set */
	unsigned short version;		/* edns version */
	unsigned int tcp;		/* use tcp */
	unsigned int ignore;		/* ignore tc in response */
	unsigned int tc;		/* set tc in request */
	unsigned int rd;		/* set rd in request */
	unsigned int ra;		/* set ra in request */
	unsigned int cd;		/* set cd in request */
	unsigned int ad;		/* set ad  in request */
	unsigned int aa;		/* set aa in request */
	unsigned int z;			/* set z in request */
	unsigned int opcode;		/* use opcode for request */
	unsigned short type;		/* query type code */
109
} opts[] = {
110 111 112 113 114 115 116 117 118 119 120 121
	{ "dns",       EDNS,  0, "",    0, 0x0000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "edns",      EDNS,  0, "", 4096, 0x0000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "edns1",     EDNS,  0, "", 4096, 0x0000, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "edns@512",  EDNS,  0, "",  512, 0x0000, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_dnskey },
	{ "ednsopt",   EDNS,  4, "\x00\x64\x00",
			             4096, 0x0000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "edns1opt",  EDNS,  4, "\x00\x64\x00",
			             4096, 0x0000, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "do",        EDNS,  4, "\0\144\0",
			             4096, 0x8000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "ednsflags", EDNS,  0, "", 4096, 0x0080, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "optlist",   EDNS,  4 + 8 + 4 + 12,
122 123 124 125
	  "\x00\x03\x00\x00" 		     /* NSID */
	  "\x00\x08\x00\x04\x00\x01\x00\x00" /* ECS */
	  "\x00\x09\x00\x00" 		     /* EXPIRE */
	  "\x00\x0a\x00\x08\x01\x02\x03\x04\x05\x06\x07\x08",	/* COOKIE */
126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
	                             4096, 0x0000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "bind11",    COMM, 12,
	  "\x00\x0a\x00\x08\x01\x02\x03\x04\x05\x06\x07\x08",
	                             4096, 0x8000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "dig11",     COMM, 12, "\x00\x0a\x00\x08\x01\x02\x03\x04\x05\x06\x07\x08",
	                             4096, 0x0000, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0,  0, ns_t_soa },
	{ "zflag",     FULL,  0, "",    0, 0x0000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,  0, ns_t_soa },
	{ "aa",        FULL,  0, "",    0, 0x0000, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0,  0, ns_t_soa },
	{ "ad",        FULL,  0, "",    0, 0x0000, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,  0, ns_t_soa },
	{ "cd",        FULL,  0, "",    0, 0x0000, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,  0, ns_t_soa },
	{ "ra",        FULL,  0, "",    0, 0x0000, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,  0, ns_t_soa },
	{ "rd",        FULL,  0, "",    0, 0x0000, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "tc",        FULL,  0, "",    0, 0x0000, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "opcode",    FULL,  0, "",    0, 0x0000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 15, 0 },
	{ "opcodeflg", FULL,  0, "",    0, 0x0000, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 15, 0 },
	{ "type666",   FULL,  0, "",    0, 0x0000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,  0, 666 },
	{ "tcp",       FULL,  0, "",    0, 0x0000, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_soa },
	{ "ednstcp",   EDNS,  0, "",  512, 0x8000, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,  0, ns_t_dnskey }
144 145
};

Mark Andrews's avatar
Mark Andrews committed
146 147 148
/*
 * Summary structure where results from multiple lookups are recorded.
 */
149 150 151 152
struct summary {
	char zone[1024];
	char ns[1024];
	struct sockaddr_storage storage;
Mark Andrews's avatar
Mark Andrews committed
153
	int tests;			/* number of outstanding tests */
154
	int done;
Mark Andrews's avatar
Mark Andrews committed
155 156 157 158 159 160 161 162
	int type;			/* recursive query lookup type */
	int nodataa;			/* recursive query got nodata */
	int nodataaaaa;			/* recursive query got nodata */
	int nxdomain;			/* recursive query got nxdomain */
	int nxdomaina;			/* recursive query got nxdomain */
	int nxdomainaaaa;		/* recursive query got nxdomain */
	int seenrrsig;			/* a rrsig was seen in "do" test */
	struct summary *xlink;		/* cross link of recursive A/AAAA */
163 164 165
	char results[sizeof(opts)/sizeof(opts[0])][100];
};

Mark Andrews's avatar
Mark Andrews committed
166 167 168 169
struct workitem {
	struct {
		struct workitem *next;
		struct workitem *prev;
170 171
		int linked;
	} link, clink, rlink, idlink;
Mark Andrews's avatar
Mark Andrews committed
172 173
	unsigned short id;
	struct timeval when;
174
	int type;
Mark Andrews's avatar
Mark Andrews committed
175 176 177
	int test;			/* test number / server number */
	int sends;			/* number of times this UDP request
					 * has been sent */
Mark Andrews's avatar
Mark Andrews committed
178 179
	int buflen;
	int tcpfd;
Mark Andrews's avatar
Mark Andrews committed
180 181
	int outstanding;		/* outstanding has been set */
	int havelen;			/* readlen is tcp message length */
182 183
	int readlen;
	int read;
Mark Andrews's avatar
Mark Andrews committed
184
	unsigned char buf[512];
185 186 187
	unsigned char tcpbuf[0x10000];
	char result[100];
	struct summary *summary;
Mark Andrews's avatar
Mark Andrews committed
188 189
};

190
/*
Mark Andrews's avatar
Mark Andrews committed
191
 * Work queues:
192 193 194
 *	'work' udp qeries;
 *	'connecting' tcp qeries;
 *	'reading' tcp qeries;
Mark Andrews's avatar
Mark Andrews committed
195 196 197
 *
 * Outstanding queries by qid.
 *	'ids'
198
 */
Mark Andrews's avatar
Mark Andrews committed
199 200 201
static struct {
	struct workitem *head;
	struct workitem *tail;
202
} work, connecting, reading, ids[0x10000];
Mark Andrews's avatar
Mark Andrews committed
203

204 205
static void
connecttoserver(struct workitem *item);
Mark Andrews's avatar
Mark Andrews committed
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235

static int
storage_equal(struct sockaddr_storage *s1, struct sockaddr_storage *s2) {
	struct sockaddr_in *sin1, *sin2;
	struct sockaddr_in6 *sin61, *sin62;

	if (s1->ss_len != s2->ss_len || s1->ss_family != s2->ss_family)
		return (0);

	switch (s1->ss_family) {
	case AF_INET:
		sin1 = (struct sockaddr_in *)s1;
		sin2 = (struct sockaddr_in *)s2;
			
		if (sin1->sin_port != sin2->sin_port ||
		    sin1->sin_addr.s_addr != sin2->sin_addr.s_addr)
			return (0);
		return (1);
	case AF_INET6:
		sin61 = (struct sockaddr_in6 *)s1;
		sin62 = (struct sockaddr_in6 *)s2;

		if (sin61->sin6_port != sin62->sin6_port ||
		    memcmp(&sin61->sin6_addr, &sin62->sin6_addr, 16) != 0)
			return (0);
		return (1);
	}
	return (0);
}

Mark Andrews's avatar
Mark Andrews committed
236 237 238
/*
 * Check if it is safe to use this id to this address.
 */
Mark Andrews's avatar
Mark Andrews committed
239 240 241 242 243 244
static int
checkid(struct sockaddr_storage *storage, int id) {
	struct workitem *item;

	item = HEAD(ids[id]);
	while (item != NULL &&
245
	       !storage_equal(storage, &item->summary->storage))
Mark Andrews's avatar
Mark Andrews committed
246 247 248 249
		item = NEXT(item, idlink);
	return ((item == NULL) ? 1 : 0);
}

Mark Andrews's avatar
Mark Andrews committed
250 251 252
/*
 * Generate a report line.
 */
253 254 255 256 257 258 259 260 261 262 263 264 265
static void
report(struct summary *summary) {
	struct sockaddr_in *s = (struct sockaddr_in *)&summary->storage;
	struct sockaddr_in6 *s6 = (struct sockaddr_in6 *)&summary->storage;;
	char addrbuf[64];
	void *addr;
	unsigned int i;
	int x;

	summary->tests--;
	if (summary->tests)
		return;

Mark Andrews's avatar
Mark Andrews committed
266 267 268 269
	/*
	 * If we are cross linked record the lookup details on the other
	 * structure.
	 */
270
	if (summary->xlink) {
Mark Andrews's avatar
Mark Andrews committed
271
		if (summary->nodataa) {
272
			summary->xlink->nodataa = 1;
Mark Andrews's avatar
Mark Andrews committed
273 274 275 276 277 278 279
			summary->done = 1;
		}
		if (summary->nodataaaaa) {
			summary->xlink->nodataaaaa = 1;
			summary->done = 1;
		}
		if (summary->nxdomaina) {
280
			summary->xlink->nxdomaina = 1;
Mark Andrews's avatar
Mark Andrews committed
281 282 283
			summary->done = 1;
		}
		if (summary->nxdomainaaaa) {
284
			summary->xlink->nxdomainaaaa = 1;
Mark Andrews's avatar
Mark Andrews committed
285 286 287 288 289
			summary->done = 1;
		}
		/*
		 * Remove the cross link.
		 */
290 291
		summary->xlink->xlink = NULL;
		summary->xlink = NULL;
Mark Andrews's avatar
Mark Andrews committed
292 293 294 295
		if (summary->done) {
			free(summary);
			return;
		}
296 297 298
	}

	if ((summary->type == ns_t_a || summary->type == ns_t_aaaa) &&
Mark Andrews's avatar
Mark Andrews committed
299
	    summary->nodataa && summary->nodataaaaa) {
300 301 302 303 304
		printf("%s. %s: no address records found\n",
		       summary->zone, summary->ns);
		free(summary);
		return;
	}
305

306 307 308 309 310 311 312 313
	if ((summary->type == ns_t_a || summary->type == ns_t_aaaa) &&
	    summary->nxdomaina && summary->nxdomainaaaa) {
		printf("%s. %s: no address records found (NXDOMAIN)\n",
		       summary->zone, summary->ns);
		free(summary);
		return;
	}

Mark Andrews's avatar
Mark Andrews committed
314
	if (summary->done || summary->nodataa || summary->nodataaaaa) {
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
		free(summary);
		return;
	}
	
	if (summary->type != 0 && summary->nxdomain) {
		if (summary->type == ns_t_ns) {
			printf("%s.: NS nxdomain\n", summary->zone);
			free(summary);
			return;
		}
		printf("%s. %s:", summary->zone, summary->ns);
		if (summary->type == ns_t_a) printf(" A");
		if (summary->type == ns_t_aaaa) printf(" AAAA");
		printf(" nxdomain\n");
		free(summary);
		return;
	}
	if (summary->type == ns_t_a) {
		printf("%s. %s:", summary->zone, summary->ns);
		printf(" A lookup failed\n");
		free(summary);
		return;
	}
	if (summary->type == ns_t_aaaa) {
		printf("%s. %s:", summary->zone, summary->ns);
		printf(" AAAA lookup failed\n");
		free(summary);
		return;
	}
	if (summary->type == ns_t_ns) {
		printf("%s. %s:", summary->zone, summary->ns);
		printf(" NS lookup failed\n");
		free(summary);
		return;
	}
350 351 352 353 354 355 356 357 358 359 360 361 362

	switch (summary->storage.ss_family) {
	case AF_INET: addr = &s->sin_addr; break;
	case AF_INET6: addr = &s6->sin6_addr; break;
	default: addr = NULL; break;
	}
	
	if (addr == NULL)
		strlcpy(addrbuf, "<unknown>", sizeof(addrbuf));
	else
		inet_ntop(summary->storage.ss_family, addr,
			  addrbuf, sizeof(addrbuf));

363 364 365
	x = -1;
	printf("%s. @%s (%s.):", summary->zone, addrbuf, summary->ns);
	for (i = 0; i < sizeof(opts)/sizeof(opts[0]); i++) {
366 367
		if (opts[i].what != 0 && (opts[i].what & what) == 0)
			continue;
368
		if (summary->results[i][0] == 0)
369
			strlcpy(summary->results[i], "skipped", 100);
370 371 372 373 374 375 376 377 378 379 380 381 382
		if (strcmp(opts[i].name, "do") == 0)
			x = i;
		if (strcmp(opts[i].name, "ednstcp") == 0 && x != -1) {
			printf(" signed=%s", summary->results[x]);
			if (summary->seenrrsig)
				printf(",yes");
		}
		printf(" %s=%s", opts[i].name, summary->results[i]);
	}
	printf("\n");
	free(summary);
}

Mark Andrews's avatar
Mark Andrews committed
383 384 385
/*
 * Free a work item and unlink.
 */
386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408
static void
freeitem(struct workitem * item) {
	report(item->summary);
	if (item->tcpfd != 0) {
		FD_CLR(item->tcpfd, &rfds);
		FD_CLR(item->tcpfd, &wfds);
		rhandlers[item->tcpfd] = NULL;
		whandlers[item->tcpfd] = NULL;
		close(item->tcpfd);
	}
	if (item->outstanding)
		outstanding--;
	if (LINKED(item, link))
		UNLINK(work, item, link);
	if (LINKED(item, rlink))
		UNLINK(reading, item, rlink);
	if (LINKED(item, clink))
		UNLINK(connecting, item, clink);
	if (LINKED(item, idlink))
		UNLINK(ids[item->id], item, idlink);
	free(item);
}

Mark Andrews's avatar
Mark Andrews committed
409 410 411
/*
 * Add a tag to the report.
 */
412 413 414
static void
addtag(struct workitem *item, char *tag) {
	char *result = item->summary->results[item->test];
415 416
	if (result[0]) strlcat(result, ",", 100);
	strlcat(result, tag, 100);
417 418
}

Mark Andrews's avatar
Mark Andrews committed
419 420 421
/*
 * Resend a UDP request.
 */
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
static void
resend(struct workitem *item) {
	int n, fd = -1;

	switch (item->summary->storage.ss_family) {
	case AF_INET:
		fd = udp4;
		break;
	case AF_INET6:
		fd = udp6;
		break;
	}

	if (fd == -1) {
		addtag(item, "skipped");
		freeitem(item);
		return;
	}

	if (outstanding > maxoutstanding) {
		gettimeofday(&item->when, NULL);
		item->when.tv_sec += 1;
		UNLINK(work, item, link);
		APPEND(work, item, link);
		return;
	}

	n = sendto(fd, item->buf, item->buflen, 0,
		   (struct sockaddr *)&item->summary->storage,
		   item->summary->storage.ss_len);
	if (n > 0) {
		if (debug)
			printf("resend %s rdlen=%u udpsize=%u flags=%04x "
			       "version=%u tcp=%u ignore=%u id=%u\n",
			       opts[item->test].name, opts[item->test].rdlen,
			       opts[item->test].udpsize, opts[item->test].flags,
			       opts[item->test].version, opts[item->test].tcp,
			       opts[item->test].ignore, item->id);
		if (!item->outstanding++)
			outstanding++;
		gettimeofday(&item->when, NULL);
		item->when.tv_sec += 1;
		item->sends++;
		UNLINK(work, item, link);
		APPEND(work, item, link);
	} else {
		addtag(item, "failed");
		freeitem(item);
	}
}

Mark Andrews's avatar
Mark Andrews committed
473 474 475
/*
 * Start a individual test.
 */
Mark Andrews's avatar
Mark Andrews committed
476 477 478 479
static void
dotest(struct workitem *item) {
	unsigned char *cp;
	unsigned int ttl;
Mark Andrews's avatar
Mark Andrews committed
480
	int n, fd, id, tries = 0, opcode;
Mark Andrews's avatar
Mark Andrews committed
481

482
	switch (item->summary->storage.ss_family) {
Mark Andrews's avatar
Mark Andrews committed
483 484 485 486 487 488 489 490 491
	case AF_INET:
		fd = udp4;
		break;
	case AF_INET6:
		fd = udp6;
		break;
	}

	if (fd == -1) {
492 493
		addtag(item, "skipped");
		freeitem(item);
Mark Andrews's avatar
Mark Andrews committed
494 495
		return;
	}
Mark Andrews's avatar
Mark Andrews committed
496

Mark Andrews's avatar
Mark Andrews committed
497 498 499 500
	/*
	 * res_mkquery only really knows about QUERY but it is useful
	 * for initalising the header when the opcode isn't QUERY.
	 */
Mark Andrews's avatar
Mark Andrews committed
501 502 503 504 505 506 507 508
	opcode = opts[item->test].opcode;
	switch (opcode) {
	case 0: break;
	default:
		opcode = ns_o_query;
	}

	n = res_mkquery(opcode, item->summary->zone, ns_c_in,
509 510
			opts[item->test].type, NULL, 0, NULL,
			item->buf, sizeof(item->buf));
Mark Andrews's avatar
Mark Andrews committed
511 512 513 514 515 516 517 518
	/* fixup opcode? */
	if (n > 0 && opts[item->test].opcode != opcode) {
		item->buf[2] &= 0x17;
		item->buf[2] |= (opts[item->test].opcode & 0x0f) << 3;
		/* Zero question section. */
		if (opts[item->test].opcode == 15)
			item->buf[4] = item->buf[5] = 0;
	}
Mark Andrews's avatar
Mark Andrews committed
519 520 521 522

	/*
	 * Set DNS flags as specified by test.
	 */
523 524
	if (opts[item->test].tc)
		item->buf[2] |= 0x2;	/* set tc */
Mark Andrews's avatar
Mark Andrews committed
525 526 527 528
	if (opts[item->test].rd)
		item->buf[2] |= 0x1;	/* set rd */
	else
		item->buf[2] &= ~0x1;	/* clear rd */
529 530 531 532 533 534 535 536
	if (opts[item->test].ra)
		item->buf[3] |= 0x80;	/* set ra */
	if (opts[item->test].z)
		item->buf[3] |= 0x40;	/* set z */
	if (opts[item->test].ad)
		item->buf[3] |= 0x20;	/* set ad */
	if (opts[item->test].cd)
		item->buf[3] |= 0x10;	/* set cd */
Mark Andrews's avatar
Mark Andrews committed
537
		
538 539
	if (n > 0) {
		char name[1024];
Mark Andrews's avatar
Mark Andrews committed
540 541 542
		/*
		 * Make zone canonical.
		 */
543 544
		dn_expand(item->buf, item->buf + n, item->buf + 12,
			  name, sizeof(name));
545 546
		strlcpy(item->summary->zone, name,
			sizeof(item->summary->zone));
547 548
	}
	
Mark Andrews's avatar
Mark Andrews committed
549 550 551 552 553
	/*
	 * Add OPT record if required by test.
	 */
	if (n > 0 && opts[item->test].udpsize > 0 &&
	    11 + opts[item->test].rdlen < 512 - n) {
Mark Andrews's avatar
Mark Andrews committed
554
		cp = item->buf + n;
555 556 557 558 559 560 561 562 563 564 565
		*cp++ = 0;				/* name */
		ns_put16(ns_t_opt, cp);			/* type */
		cp += 2;
		ns_put16(opts[item->test].udpsize, cp);	/* class */
		cp += 2;
		ttl = (opts[item->test].version << 16) |
		      opts[item->test].flags;
		ns_put32(ttl, cp);			/* ttl */
		cp += 4;
		ns_put16(opts[item->test].rdlen, cp);	/* rdlen */
		cp += 2;
Mark Andrews's avatar
Mark Andrews committed
566 567
		memcpy(cp, opts[item->test].rdata, opts[item->test].rdlen);
		cp += opts[item->test].rdlen;
568 569
		item->buf[11] = 1;			/* adcount */
		n = cp - item->buf;			/* total length */
Mark Andrews's avatar
Mark Andrews committed
570 571 572
	}

	if (n > 0) {
Mark Andrews's avatar
Mark Andrews committed
573 574 575
		/*
		 * Adjust id if it clashes with a outstanding request.
		 */
Mark Andrews's avatar
Mark Andrews committed
576 577
		id = item->buf[0] << 8 | item->buf[1];

578 579
		while (!checkid(&item->summary->storage, id) &&
		       tries++ < 0xffff)
Mark Andrews's avatar
Mark Andrews committed
580 581 582
			id = (id + 1) & 0xffff;
		
		if (tries == 0xffff) {
583 584
			addtag(item, "skipped");
			freeitem(item);
Mark Andrews's avatar
Mark Andrews committed
585 586
			return;
		}
587
 
Mark Andrews's avatar
Mark Andrews committed
588 589 590 591 592
		item->buf[0] = id >> 8;
		item->buf[1] = id & 0xff;
		item->id = id;
		item->buflen = n;

593 594 595 596 597
		if (opts[item->test].tcp) {
			connecttoserver(item);
			return;
		}

Mark Andrews's avatar
Mark Andrews committed
598 599 600
		/*
		 * If there is too much outstanding work queue this item.
		 */
601 602 603 604 605 606 607 608
		if (outstanding > maxoutstanding) {
			gettimeofday(&item->when, NULL);
			item->when.tv_sec += 1;
			APPEND(work, item, link);
			APPEND(ids[item->id], item, idlink);
			return;
		}

Mark Andrews's avatar
Mark Andrews committed
609
		n = sendto(fd, item->buf, item->buflen, 0,
610 611
			   (struct sockaddr *)&item->summary->storage,
			   item->summary->storage.ss_len);
Mark Andrews's avatar
Mark Andrews committed
612 613 614
	}

	if (n > 0) {
615 616 617 618 619 620 621 622 623
		if (debug)
			printf("%s rdlen=%u udpsize=%u flags=%04x version=%u "
			       "tcp=%u ignore=%u id=%u\n",
			       opts[item->test].name, opts[item->test].rdlen,
			       opts[item->test].udpsize, opts[item->test].flags,
			       opts[item->test].version, opts[item->test].tcp,
			       opts[item->test].ignore, item->id);
		if (!item->outstanding++)
			outstanding++;
Mark Andrews's avatar
Mark Andrews committed
624
		gettimeofday(&item->when, NULL);
625
		item->when.tv_sec += 1;
Mark Andrews's avatar
Mark Andrews committed
626 627 628
		item->sends = 1;
		APPEND(work, item, link);
		APPEND(ids[item->id], item, idlink);
629 630 631 632
	} else {
		addtag(item, "failed");
		freeitem(item);
	}
Mark Andrews's avatar
Mark Andrews committed
633 634
}

Mark Andrews's avatar
Mark Andrews committed
635 636 637
/*
 * Start a series of tests.
 */
Mark Andrews's avatar
Mark Andrews committed
638 639 640
static void
check(char *zone, char *ns, char *address) {
	size_t i;
Mark Andrews's avatar
Mark Andrews committed
641
	int fd;
Mark Andrews's avatar
Mark Andrews committed
642 643 644
	struct in_addr addr;
	struct in6_addr addr6;
	struct sockaddr_storage storage;
645
	struct summary *summary;
Mark Andrews's avatar
Mark Andrews committed
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667
	
	memset(&storage, 0, sizeof(storage));
	if (inet_pton(AF_INET6, address, &addr6) == 1) {
		struct sockaddr_in6 *s = (struct sockaddr_in6 *)&storage;
		s->sin6_len = sizeof(struct sockaddr_in6);
		s->sin6_family = AF_INET6;
		s->sin6_port = htons(53);
		s->sin6_addr = addr6;
		fd = udp6;
	} else if (inet_pton(AF_INET, address, &addr) == 1) {
		struct sockaddr_in *s = (struct sockaddr_in *)&storage;
		s->sin_len = sizeof(struct sockaddr_in);
		s->sin_family = AF_INET;
		s->sin_port = htons(53);
		s->sin_addr = addr;
		fd = udp4;
	} else
		return;

	if (fd == -1)
		return;

668 669 670
	summary = calloc(1, sizeof(*summary));
	if (summary == NULL)
		return;
Mark Andrews's avatar
Mark Andrews committed
671

672
	summary->storage = storage;
Mark Andrews's avatar
Mark Andrews committed
673

674 675 676
	ns_makecanon(zone, summary->zone, sizeof(summary->zone));
	i = strlen(summary->zone);
	if (i) summary->zone[i-1] = 0;
Mark Andrews's avatar
Mark Andrews committed
677

678 679 680
	ns_makecanon(ns, summary->ns, sizeof(summary->ns));
	i = strlen(summary->ns);
	if (i) summary->ns[i-1] = 0;
Mark Andrews's avatar
Mark Andrews committed
681

Mark Andrews's avatar
Mark Andrews committed
682
	for (i = 0; i < sizeof(opts)/sizeof(opts[0]); i++) {
Mark Andrews's avatar
style  
Mark Andrews committed
683
		struct workitem *item;
684 685
		if (opts[i].what != 0 && (opts[i].what & what) == 0)
			continue;
Mark Andrews's avatar
Mark Andrews committed
686

Mark Andrews's avatar
style  
Mark Andrews committed
687
		item = calloc(1, sizeof(*item));
688 689 690
		if (item == NULL) {
			summary->tests++;
			report(summary);
Mark Andrews's avatar
Mark Andrews committed
691
			break;
692
		}
Mark Andrews's avatar
Mark Andrews committed
693

694 695
		summary->tests++;
		item->summary = summary;
Mark Andrews's avatar
Mark Andrews committed
696 697 698 699 700
		item->test = i;
		dotest(item);
	}
}

701 702 703
static char *
rcodetext(int code) {
	static char buf[64];
Mark Andrews's avatar
Mark Andrews committed
704

705 706 707 708 709 710 711 712 713 714 715 716 717 718 719
	switch(code) {
	case 0: return("noerror");
	case 1: return("formerr");
	case 2: return("servfail");
	case 3: return("nxdomain");
	case 4: return("notimpl");
	case 5: return("refused");
	case 6: return("yxdomain");
	case 7: return("yxrrset");
	case 8: return("nxrrset");
	case 9: return("notauth");
	case 10: return("notzone");
	case 16: return("badvers");
	case 23: return("badcookie");
	default:
Mark Andrews's avatar
Mark Andrews committed
720
		snprintf(buf, sizeof(buf), "rcode%u", code);
721 722 723 724
		return (buf);
	}
}

Mark Andrews's avatar
Mark Andrews committed
725 726 727
/*
 * Start a lookup using the recursive server(s).
 */
728 729 730 731 732 733 734 735
static void
dolookup(struct workitem *item, int type) {
	char name[1024];
	int n, fd = -1;

	item->summary->tests++;
	item->summary->type = item->type = type;

736
 again:
737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753
	if (servers[item->test].sin.sin_family == AF_INET)
		memcpy(&item->summary->storage, &servers[item->test].sin,
		       sizeof(servers[item->test].sin));
	else
		memcpy(&item->summary->storage, &servers[0].sin6,
		       sizeof(servers[item->test].sin6));

	switch (item->summary->storage.ss_family) {
	case AF_INET:
		fd = udp4;
		break;
	case AF_INET6:
		fd = udp6;
		break;
	}

	if (fd == -1) {
754 755
		if (++item->test < nservers)
			goto again;
756 757 758 759 760 761 762 763 764 765 766 767 768 769
		addtag(item, "skipped");
		freeitem(item);
		return;
	}
	
	if (type == ns_t_ns)
		n = res_mkquery(ns_o_query, item->summary->zone, ns_c_in,
				type, NULL, 0, NULL,
				item->buf, sizeof(item->buf));
	else
		n = res_mkquery(ns_o_query, item->summary->ns, ns_c_in,
				type, NULL, 0, NULL,
				item->buf, sizeof(item->buf));
	if (n > 0) {
Mark Andrews's avatar
Mark Andrews committed
770
		int id, tries = 0;
771

Mark Andrews's avatar
Mark Andrews committed
772 773 774
		/*
		 * Make name canonical.
		 */
775
		dn_expand(item->buf, item->buf + n, item->buf + 12,
Mark Andrews's avatar
Mark Andrews committed
776 777 778 779
			  name, sizeof(name));

		switch (type) {
		case ns_t_ns:
780 781
			strlcpy(item->summary->zone, name,
				sizeof(item->summary->zone));
Mark Andrews's avatar
Mark Andrews committed
782 783 784
			break;
		case ns_t_a:
		case ns_t_aaaa:
785 786
			strlcpy(item->summary->ns, name,
				sizeof(item->summary->zone));
Mark Andrews's avatar
Mark Andrews committed
787 788 789 790 791
			break;
		}

		item->buf[2] |= 0x1;	/* set rd */
		id = item->buf[0] << 8 | item->buf[1];
792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813

		while (!checkid(&item->summary->storage, id) &&
		       tries++ < 0xffff)
			id = (id + 1) & 0xffff;
		
		if (tries == 0xffff) {
			addtag(item, "skipped");
			freeitem(item);
			return;
		}

		item->buf[0] = id >> 8;
		item->buf[1] = id & 0xff;
		item->id = id;
		item->buflen = n;
		if (outstanding > maxoutstanding) {
			gettimeofday(&item->when, NULL);
			item->when.tv_sec += 1;
			APPEND(work, item, link);
			APPEND(ids[item->id], item, idlink);
			return;
		}
Mark Andrews's avatar
Mark Andrews committed
814

815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834
		n = sendto(fd, item->buf, item->buflen, 0,
			   (struct sockaddr *)&item->summary->storage,
			   item->summary->storage.ss_len);
	}
	if (n > 0) {
		if (debug)
			printf("lookup %u id=%u\n", item->type, item->id);
		if (!item->outstanding++)
			outstanding++;
		gettimeofday(&item->when, NULL);
		item->when.tv_sec += 1;
		item->sends++;
		APPEND(work, item, link);
		APPEND(ids[item->id], item, idlink);
	} else {
		addtag(item, "skipped");
		freeitem(item);
	}
}

Mark Andrews's avatar
Mark Andrews committed
835 836 837
/*
 * Start a A lookup.
 */
838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864
static struct summary *
lookupa(char *zone, char *ns) {
	struct summary *summary;
	struct workitem *item;
	unsigned int i;

	summary = calloc(1, sizeof(*summary));
	if (summary == NULL)
		return (NULL);

	ns_makecanon(zone, summary->zone, sizeof(summary->zone));
	i = strlen(summary->zone);
	if (i) summary->zone[i-1] = 0;

	ns_makecanon(ns, summary->ns, sizeof(summary->ns));
	i = strlen(summary->ns);
	if (i) summary->ns[i-1] = 0;

	item = calloc(1, sizeof(*item));
	if (item == NULL)
		free(summary);

	item->summary = summary;
	dolookup(item, ns_t_a);
	return (summary);
}

Mark Andrews's avatar
Mark Andrews committed
865 866 867
/*
 * Start a AAAA lookup.
 */
868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894
static struct summary *
lookupaaaa(char *zone, char *ns) {
	struct summary *summary;
	struct workitem *item;
	unsigned int i;

	summary = calloc(1, sizeof(*summary));
	if (summary == NULL)
		return (NULL);

	ns_makecanon(zone, summary->zone, sizeof(summary->zone));
	i = strlen(summary->zone);
	if (i) summary->zone[i-1] = 0;

	ns_makecanon(ns, summary->ns, sizeof(summary->ns));
	i = strlen(summary->ns);
	if (i) summary->ns[i-1] = 0;

	item = calloc(1, sizeof(*item));
	if (item == NULL)
		free(summary);

	item->summary = summary;
	dolookup(item, ns_t_aaaa);
	return (summary);
}

Mark Andrews's avatar
Mark Andrews committed
895 896 897
/*
 * Start a NS lookup.
 */
898 899 900 901 902 903 904 905 906
static void
lookupns(char *zone) {
	struct summary *summary;
	struct workitem *item;
	unsigned int i;

	summary = calloc(1, sizeof(*summary));
	if (summary == NULL)
		return;
Mark Andrews's avatar
Mark Andrews committed
907 908 909 910

	ns_makecanon(zone, summary->zone, sizeof(summary->zone));
	i = strlen(summary->zone);
	if (i) summary->zone[i-1] = 0;
911 912 913 914 915 916 917 918 919

	item = calloc(1, sizeof(*item));
	if (item == NULL)
		free(summary);

	item->summary = summary;
	dolookup(item, ns_t_ns);
}

Mark Andrews's avatar
Mark Andrews committed
920 921 922
/*
 * Process a recieved response.
 */
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
static void
process(struct workitem *item, unsigned char *buf, int n) {
	char name[1024], ns[1024];
	unsigned int i, id, qr, aa, tc, rd, ra, z, ad, cd;
	unsigned int qrcount, ancount, aucount, adcount;
	unsigned int opcode, rcode;
	unsigned int type, ednssize = 0, class, ednsttl = 0, ttl, rdlen;
	unsigned char *cp, *eom; 	
	int seenopt = 0, seensoa = 0, seenrrsig = 0;
	int seennsid = 0, seenecs = 0, seenexpire = 0, seencookie = 0;
	int seenecho = 0;
	char addrbuf[64];
	int ok = 1;

	/* process message header */

	id = buf[0] << 8| buf[1];
	qr = (buf[2] >> 7) & 0x1;
	opcode = (buf[2] >> 3) & 0xf;
	aa = (buf[2] >> 2) & 0x1;
	tc = (buf[2] >> 1) & 0x1;
	rd = buf[2] & 0x1;
	ra = (buf[3] >> 7) & 0x1;
	z = (buf[3] >> 6) & 0x1;
	ad = (buf[3] >> 5) & 0x1;
	cd = (buf[3] >> 4) & 0x1;
	rcode = buf[3] & 0xf;
	qrcount = buf[4] << 8 | buf[5];
	ancount = buf[6] << 8 | buf[7];
	aucount = buf[8] << 8 | buf[9];
	adcount = buf[10] << 8 | buf[11];

Mark Andrews's avatar
Mark Andrews committed
955 956
	if (tc && item->tcpfd == 0 &&
	    (item->summary->type || !opts[item->test].ignore)) {
957 958 959 960 961 962 963 964 965
		if (LINKED(item, link))
			UNLINK(work, item, link);
		connecttoserver(item);
		return;
	}

	/* process message body */

	if (item->type == ns_t_a || item->type == ns_t_aaaa)
966
		strlcpy(ns, item->summary->ns, sizeof(ns));
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

	cp = buf + 12;
	eom = buf + n;
	for (i = 0; i < qrcount; i++) {
		n = dn_expand(buf, eom, cp, name, sizeof(name));
		if (n < 0 || (eom - cp) < n)
			goto err;
		cp += n;
		if ((eom - cp) < 4)
			goto err;
		type = ns_get16(cp);
		cp += 2;
		class = ns_get16(cp);
		cp += 2;
		if (debug)
			printf("QR: %s./%u/%u\n", name, type, class);

		/*
		 * No address / NS records?
		 */
		if (item->type == ns_t_a && type == ns_t_a &&
		    strcasecmp(item->summary->ns, name) == 0 &&
		    rcode == 0 && ancount == 0) {
			item->summary->nodataa = 1;
		}
		if (item->type == ns_t_aaaa && type == ns_t_aaaa &&
		    strcasecmp(item->summary->ns, name) == 0 &&
		    rcode == 0 && ancount == 0) {
Mark Andrews's avatar
Mark Andrews committed
995
			item->summary->nodataaaaa = 1;
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
		}
		if (item->type == ns_t_ns && type == ns_t_ns &&
		    strcasecmp(item->summary->zone, name) == 0 &&
		    rcode == 0 && ancount == 0)
			item->summary->done = 1;

		/*
		 * NXDOMAIN?
		 */
		if (item->type == ns_t_a && type == ns_t_a &&
		    strcasecmp(item->summary->ns, name) == 0 &&
		    rcode == 3 && ancount == 0)
			item->summary->nxdomaina = 1;
		if (item->type == ns_t_aaaa && type == ns_t_aaaa &&
		    strcasecmp(item->summary->ns, name) == 0 &&
		    rcode == 3 && ancount == 0)
			item->summary->nxdomainaaaa = 1;
		if (item->type == ns_t_ns && type == ns_t_ns &&
		    strcasecmp(item->summary->zone, name) == 0 &&
		    rcode == 3 && ancount == 0)
			item->summary->nxdomain = 1;
	}

	for (i = 0; i < ancount; i++) {
		n = dn_expand(buf, eom, cp, name, sizeof(name));
		if (n < 0 || (eom - cp) < n)
			goto err;
		cp += n;
		if ((eom - cp) < 8)
			goto err;
		type = ns_get16(cp);
		cp += 2;
		class = ns_get16(cp);
		cp += 2;
		ttl = ns_get32(cp);
		cp += 4;
		rdlen = ns_get16(cp);
		cp += 2;
		if ((eom - cp) < rdlen)
			goto err;
		if ((item->type == ns_t_a || item->type == ns_t_aaaa) &&
		    type == ns_t_cname && strcasecmp(ns, name) == 0) {
			n = dn_expand(buf, eom, cp, ns, sizeof(ns));
			if (n != rdlen)
				goto err;
		}
		if (item->type == ns_t_a && type == ns_t_a &&
		    strcasecmp(ns, name) == 0)
		{
			if (rdlen != 4)
				goto err;
			inet_ntop(AF_INET, cp, addrbuf, sizeof(addrbuf));
			check(item->summary->zone, item->summary->ns, addrbuf);
			item->summary->done = 1;
		}
		if (item->type == ns_t_aaaa && type == ns_t_aaaa &&
		    strcasecmp(ns, name) == 0)
		{
			if (rdlen != 16)
				goto err;
			inet_ntop(AF_INET6, cp, addrbuf, sizeof(addrbuf));
			check(item->summary->zone, item->summary->ns, addrbuf);
			item->summary->done = 1;
		}
		if (item->type == ns_t_ns && type == ns_t_ns &&
		    strcasecmp(item->summary->zone, name) == 0)
		{
			struct summary *summarya, *summaryaaaa;
			n = dn_expand(buf, eom, cp, ns, sizeof(ns));
			if (n != rdlen)
				goto err;
			item->summary->done = 1;
Mark Andrews's avatar
Mark Andrews committed
1068 1069 1070 1071
			/*
			 * Cross link A/AAAA lookups so that we can generate
			 * a single NXDOMAIN / no address report.
			 */
1072 1073 1074 1075 1076 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 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168
			summarya = lookupa(item->summary->zone, ns);
			summaryaaaa = lookupaaaa(item->summary->zone, ns);
			if (summarya && summaryaaaa) {
				summarya->xlink = summaryaaaa;
				summaryaaaa->xlink = summarya;
			}
		}
		cp += rdlen;
		if (type == ns_t_soa &&
		    strcasecmp(item->summary->zone, name) == 0)
			seensoa = 1;
		else if (type == ns_t_soa)
		    printf("%s %s\n", item->summary->zone, name);
		if (type == ns_t_rrsig)
			seenrrsig = 1;
		if (debug)
			printf("AN: %s./%u/%u/%u/%u\n",
			       name, type, class, ttl, rdlen);
	}

	for (i = 0; i < aucount; i++) {
		n = dn_expand(buf, eom, cp, name, sizeof(name));
		if (n < 0 || (eom - cp) < n)
			goto err;
		cp += n;
		if ((eom - cp) < 8)
			goto err;
		type = ns_get16(cp);
		cp += 2;
		class = ns_get16(cp);
		cp += 2;
		ttl = ns_get32(cp);
		cp += 4;
		rdlen = ns_get16(cp);
		cp += 2;
		if ((eom - cp) < rdlen)
			goto err;
		cp += rdlen;
		if (debug)
			printf("AU: %s./%u/%u/%u/%u\n",
			       name, type, class, ttl, rdlen);
	}

	for (i = 0; i < adcount; i++) {
		n = dn_expand(buf, eom, cp, name, sizeof(name));
		if (n < 0 || (eom - cp) < n)
			goto err;
		cp += n;
		if ((eom - cp) < 8)
			goto err;
		type = ns_get16(cp);
		cp += 2;
		class = ns_get16(cp);
		cp += 2;
		ttl = ns_get32(cp);
		cp += 4;
		rdlen = ns_get16(cp);
		cp += 2;
		if ((eom - cp) < rdlen)
			goto err;
		if (type == ns_t_opt && !seenopt) {
			unsigned char *options;
			ednsttl = ttl;
			ednssize = class;
			seenopt = 1;
			options = cp;
			while (((cp + rdlen) - options) >= 4) {
				unsigned int code, optlen;
				code = ns_get16(options);
				options += 2;
				optlen = ns_get16(options);
				options += 2;
				if (code == 3 && optlen > 0)
					seennsid = 1;
				if (code == 8)
					seenecs = 1;
				if (code == 9 && optlen == 4)
					seenexpire = 1;
				if (code == 10 && optlen >= 16 && optlen <= 24)
					seencookie = 1;
				if (code == 100)
					seenecho = 1;
				options += optlen;
			}
			if (options != (cp + rdlen))
				goto err;
		}
		cp += rdlen;
		if (debug)
			printf("AD: %s./%u/%u/%u/%u\n",
			       name, type, class, ttl, rdlen);
	}
	if (cp != eom)
		goto err;

	rcode += (ednsttl & 0xff000000) >> 20;

1169 1170 1171 1172 1173 1174
	if (debug) {
		const char *testname;
		if (item->summary->type == 0)
			testname = opts[item->test].name;
		else
			testname = "";
1175 1176 1177 1178 1179
		printf("id=%-5u %-9s opcode=%u rcode=%u aa=%u tc=%u rd=%u "
		       "ra=%u z=%u ad=%u cd=%u qrcount=%u ancount=%u "
		       "aucount=%u adcount=%u\n"
		       "\tseensoa=%u seenrrsig=%u seenopt=%u "
		       "seennsid=%u seenecs=%u seenexpire=%u seencookie=%u\n",
1180
		       id, testname, opcode, rcode,
1181 1182 1183 1184
		       aa, tc, rd, ra, z, ad, cd,
		       qrcount, ancount, aucount, adcount,
		       seensoa, seenrrsig, seenopt,
		       seennsid, seenecs, seenexpire, seencookie);
1185
	}
Mark Andrews's avatar
Mark Andrews committed
1186 1187 1188 1189 1190 1191 1192 1193

	if (item->summary->type)
		goto done;

	if (opts[item->test].version == 0) {
		if (opts[item->test].opcode == 0 && rcode != 0)
			addtag(item, rcodetext(rcode)), ok = 0;
		if (opts[item->test].opcode != 0 && rcode != 4)
1194
			addtag(item, rcodetext(rcode)), ok = 0;
Mark Andrews's avatar
Mark Andrews committed
1195
	}
1196 1197 1198 1199 1200
	if (opts[item->test].version != 0)
		if (rcode != 16) /* badvers */
			addtag(item, rcodetext(rcode)), ok = 0;
	if ((ednsttl & 0xff0000) != 0)
		addtag(item, "badversion"), ok = 0;
Mark Andrews's avatar
Mark Andrews committed
1201 1202 1203 1204
	if (!seenopt && opts[item->test].udpsize)
		addtag(item, "noopt"), ok = 0;
	if (seenopt && opts[item->test].udpsize == 0)
		addtag(item, "opt"), ok = 0;
1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215
	if (opts[item->test].type == ns_t_soa)
		if (opts[item->test].version == 0 &&
		    !opts[item->test].ignore && !seensoa)
			addtag(item, "nosoa"), ok = 0;
	if (opts[item->test].type == ns_t_soa)
		if (opts[item->test].version != 0 && seensoa)
			addtag(item, "soa"), ok = 0;
	if (seenecho)
		addtag(item, "echoed"), ok = 0;
	if ((ednsttl & 0x8000) == 0 && seenrrsig)
		addtag(item, "nodo"), ok = 0;
Mark Andrews's avatar
Mark Andrews committed
1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234
	if (!aa && opts[item->test].version == 0 &&
	    opts[item->test].opcode == 0)
		addtag(item, "noaa"), ok = 0;
	if (aa && opts[item->test].opcode != 0)
		addtag(item, "aa"), ok = 0;
	if (ra && opts[item->test].opcode)
		addtag(item, "ra"), ok = 0;
	if (rd &&
	    (opts[item->test].opcode || !opts[item->test].rd))
		addtag(item, "rd"), ok = 0;
	if (!rd && opts[item->test].rd)
		addtag(item, "nord"), ok = 0;
	if (ad &&
	    (opts[item->test].opcode || !opts[item->test].ad))
		addtag(item, "ad"), ok = 0;
	if (cd)
		addtag(item, "cd"), ok = 0;
	if (z)
		addtag(item, "z"), ok = 0;
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256
	if ((ednsttl & 0x7fff) != 0)
		addtag(item, "mbz"), ok = 0;
	if (seenrrsig)
		item->summary->seenrrsig = 1;
	if (ok)
		addtag(item, "ok");
	if (seennsid)
		addtag(item, "nsid");
	if (seenexpire)
		addtag(item, "expire");
	if (seencookie)
		addtag(item, "cookie");
	if (seenecs)
		addtag(item, "subnet");
		
	goto done;
 err:
	addtag(item, "malformed");
 done:
	freeitem(item);
}

Mark Andrews's avatar
Mark Andrews committed
1257 1258 1259
/*
 * Read a TCP response.
 */
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300
static void
tcpread(int fd) {
	struct workitem *item;
	int n;

	item = HEAD(reading);
	while (item && item->tcpfd != fd)
		item = NEXT(item, rlink);
	if (item == NULL)
		return;
 again:
	n = read(fd, item->tcpbuf + item->read, item->readlen - item->read);
	if (n == 0) {
		addtag(item, "eof");
		freeitem(item);
		return;
	}
	if (n < 0 && (errno == EAGAIN || errno == EINTR))
		return;
	if (n < 0) {
		if (errno == ECONNRESET)
			addtag(item, "reset");
		else if (errno == EPIPE)
			addtag(item, "pipe");
		else 
			addtag(item, "read");
		freeitem(item);
		return;
	} 
	item->read += n;
	if (item->read == item->readlen) {
		if (!item->havelen) {
			item->readlen = item->tcpbuf[0] << 8 | item->tcpbuf[1];
			item->havelen = 1;
			item->read = 0;
			goto again;
		}
		process(item, item->tcpbuf, item->readlen);
	}
}

Mark Andrews's avatar
Mark Andrews committed
1301 1302 1303
/*
 * Send the TCP request and start the read process.
 */
1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334
static void
startread(struct workitem *item) {
	struct iovec iov[2];
	int iovcnt = 2;
	unsigned char buf[2];
	int n;

	FD_SET(item->tcpfd, &rfds);
	if (item->tcpfd > maxfd)
		maxfd = item->tcpfd;
	rhandlers[item->tcpfd] = tcpread;
	gettimeofday(&item->when, NULL);
	item->when.tv_sec += 10;
	APPEND(reading, item, rlink);
	item->havelen = 0;
	item->readlen = 2;
	item->read = 0;

	buf[0] = item->buflen>>8;
	buf[1] = item->buflen&0xff;
	iov[0].iov_base = &buf;
	iov[0].iov_len = 2;
	iov[1].iov_base = &item->buf;
	iov[1].iov_len = item->buflen;
	n = writev(item->tcpfd, iov, iovcnt);
	if (n != 2 + item->buflen) {
		addtag(item, "writev");
		freeitem(item);
	}
}

Mark Andrews's avatar
Mark Andrews committed
1335 1336 1337
/*
 * Check if the connect succeeded and start perform a TCP request if it has.
 */
1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349
static void
connectdone(int fd) {
	struct workitem *item;
	socklen_t optlen;
	int cc;

	item = HEAD(connecting);
	while (item && item->tcpfd != fd)
		item = NEXT(item, clink);
	if (item == NULL)
		return;

1350 1351 1352
	optlen = sizeof(cc);
	if (getsockopt(item->tcpfd, SOL_SOCKET, SO_ERROR,
		       (void *)&cc, (void *)&optlen) < 0)
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369
		cc = errno;
	if (cc != 0) {
		if (cc == ECONNRESET)
			addtag(item, "reset");
		else if (cc == ECONNREFUSED)
			addtag(item, "connection-refused");
		else
			addtag(item, "failed");
		freeitem(item);
		return;
	}
	UNLINK(connecting, item, clink);
	FD_CLR(item->tcpfd, &wfds);
	whandlers[item->tcpfd] = NULL;
	startread(item);
}

Mark Andrews's avatar
Mark Andrews committed
1370 1371 1372
/*
 * Connect to a server over TCP.
 */
1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383
static void
connecttoserver(struct workitem *item) {
	int fd, n, on = 1;

	fd = socket(item->summary->storage.ss_family,
		    SOCK_STREAM, IPPROTO_TCP);
	if (fd == -1) {
		addtag(item, "failed");
		freeitem(item);
		return;
	}
Mark Andrews's avatar
Mark Andrews committed
1384 1385 1386 1387

	/*
	 * Make the socket non blocking.
	 */
1388 1389 1390 1391 1392 1393 1394
	n = ioctl(fd, FIONBIO, (void *)&on);
	if (n == -1) {
		close(fd);
		addtag(item, "failed");
		freeitem(item);
		return;
	}
Mark Andrews's avatar
Mark Andrews committed
1395 1396 1397 1398

	/*
	 * Don't generate a SIG_PIPE if there is a I/O error on this socket.
	 */
1399 1400 1401 1402 1403 1404 1405
	n = setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&on, sizeof(on));
	if (n == -1) {
		close(fd);
		addtag(item, "failed");
		freeitem(item);
		return;
	}
Mark Andrews's avatar
Mark Andrews committed
1406 1407 1408 1409

	/*
	 * Start the actual connect.
	 */
1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441
	n = connect(fd, (struct sockaddr *)&item->summary->storage,
		    item->summary->storage.ss_len);
	if (n == -1 && errno == EINPROGRESS) {
		if (!item->outstanding++)
			outstanding++;
		item->tcpfd = fd;
		whandlers[fd] = connectdone;
		FD_SET(fd, &wfds);
		if (fd > maxfd)
			maxfd = fd;
		gettimeofday(&item->when, NULL);
		item->when.tv_sec += 60;
		APPEND(connecting, item, clink);
		return;
	} 
	if (n == -1) {
		if (errno == ECONNRESET)
			addtag(item, "reset");
		else if (errno == ECONNREFUSED)
			addtag(item, "connection-refused");
		else
			addtag(item, "failed");
		close(fd);
		freeitem(item);
		return;
	}
	if (!item->outstanding++)
		outstanding++;
	item->tcpfd = fd;
	startread(item);
}

Mark Andrews's avatar
Mark Andrews committed
1442 1443 1444
/*
 * Read zone [server [address]]
 */
Mark Andrews's avatar
Mark Andrews committed
1445 1446
static void
readstdin(int fd) {
1447
	char line[4096];
Mark Andrews's avatar
Mark Andrews committed
1448 1449 1450 1451 1452
	char zone[1204];
	char ns[1204];
	char address[1204];
	int n;

Mark Andrews's avatar
Mark Andrews committed
1453 1454 1455
	/*
	 * Too much outstanding work then wait to be called again.
	 */
1456 1457 1458 1459
	if (outstanding > maxoutstanding / 2)
		return;

	if (fgets(line, sizeof(line), stdin) == NULL) {
Mark Andrews's avatar
Mark Andrews committed
1460 1461 1462 1463 1464 1465 1466 1467
		eof = 1;
		FD_CLR(0, &rfds);
		for (fd = maxfd; fd >= 0; fd--) {
			if (FD_ISSET(fd, &rfds) || FD_ISSET(fd, &wfds)) {
				break;
			}
		}
		maxfd = fd;
1468 1469 1470 1471 1472 1473 1474
		return;
	}
	n = sscanf(line, "%1024s%1024s%1024s", zone, ns, address);
	if (n == 3)
		check(zone, ns, address);
	if (n == 2) {
		struct summary *summarya, *summaryaaaa;
Mark Andrews's avatar
Mark Andrews committed
1475 1476 1477 1478 1479

		/*
		 * Cross link A/AAAA lookups so that we can generate
		 * a single NXDOMAIN / no address report.
		 */
1480 1481 1482 1483 1484 1485
		summarya = lookupa(zone, ns);
		summaryaaaa = lookupaaaa(zone, ns);
		if (summarya && summaryaaaa) {
			summarya->xlink = summaryaaaa;
			summaryaaaa->xlink = summarya;
		}
Mark Andrews's avatar
Mark Andrews committed
1486
	}
1487 1488
	if (n == 1)
		lookupns(zone);
Mark Andrews's avatar
Mark Andrews committed
1489 1490 1491 1492 1493 1494 1495 1496
}

static void
udpread(int fd) {
	struct workitem *item;
	struct sockaddr_storage storage;
	socklen_t len = sizeof(storage);
	unsigned char buf[4096];
1497 1498 1499
	int n;
	unsigned int id, qr;

Mark Andrews's avatar
Mark Andrews committed
1500 1501
	n = recvfrom(fd, buf, sizeof(buf), 0,
		     (struct sockaddr *)&storage, &len);
1502 1503 1504 1505 1506 1507 1508
	if (n < 12)
		return;

	qr = (buf[2] & 0x80) != 0;
	if (!qr)
		return;

Mark Andrews's avatar
Mark Andrews committed
1509 1510 1511
	id = buf[0] << 8| buf[1];
	item = HEAD(ids[id]);
	while (item != NULL &&
1512
	       !storage_equal(&storage, &item->summary->storage))
Mark Andrews's avatar
Mark Andrews committed
1513 1514 1515 1516 1517 1518
		item = NEXT(item, idlink);

	/* Late response? */
	if (item == NULL)
		return;

1519
	process(item, buf, n);
Mark Andrews's avatar
Mark Andrews committed
1520 1521
}

1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573
static void
nextserver(struct workitem *item) {
	struct sockaddr_storage storage;
	int id, tries;
	
 again:
	if (++item->test > nservers) {
		addtag(item, "timeout");
		freeitem(item);
		return;
	}

	switch(servers[item->test].sin.sin_family) {
	case AF_INET:
		if (udp4 == -1)
			goto again;
		memcpy(&storage, &servers[item->test].sin,
		       sizeof(servers[item->test].sin));
		break;
	case AF_INET6:
		if (udp6 == -1)
			goto again;
		memcpy(&storage, &servers[0].sin6,
		       sizeof(servers[item->test].sin6));
		break;
	default:
		goto again;
	}

	/*
	 * Find a new query id if required.
	 */
	id = item->id;
	tries = 0;
	while (!checkid(&storage, id) && tries++ < 0xffff)
		id = (id + 1) & 0xffff;
	if (tries == 0xffff) 
		goto again;

	if (id != item->id) {
		UNLINK(ids[item->id], item, idlink);
		item->buf[0] = id >> 8;
		item->buf[1] = id & 0xff;
		item->id = id;
		APPEND(ids[item->id], item, idlink);
	}

	item->summary->storage = storage;
	item->sends = 0;
	resend(item);
}

1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
static void
addserver(const char *hostname) {
	int n;
	struct addrinfo hints, *res, *res0;
	
	if (nservers < 10) {
		memset(&hints, 0, sizeof(hints));
		hints.ai_family = PF_UNSPEC;
		hints.ai_socktype = SOCK_DGRAM;
		hints.ai_protocol = IPPROTO_UDP;
		hints.ai_flags = AI_ADDRCONFIG | AI_NUMERICSERV;
		if (getaddrinfo(hostname, "53", &hints, &res) == 0) {
			res0 = res;
			while (res && nservers < 10) {
				memcpy(&servers[nservers++].sin,
				       res->ai_addr, res->ai_addrlen);
				res = res->ai_next;
			}
			freeaddrinfo(res0);
		}
	}
}

Mark Andrews's avatar
Mark Andrews committed
1597
int
1598
main(int argc, char **argv) {
Mark Andrews's avatar
Mark Andrews committed
1599
	struct timeval now, to, *tpo = NULL;
1600
	struct workitem *item = NULL, *citem, *ritem;
Mark Andrews's avatar
Mark Andrews committed
1601 1602 1603 1604 1605 1606
	fd_set myrfds, mywfds;
	int n;
	int fd;
	int nfds = 0;
	int done = 0;

1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617
	while ((n = getopt(argc, argv, "cdfs:")) != -1) {
		switch (n) {
		case 'c': what |= COMM; break;
		case 'd': debug = 1; break;
		case 'f': what |= FULL; break;
		case 's': addserver(optarg); break;
		default:
			printf("usage: genreport [-c|-d|-f] [-s address]\n");
			exit(0);
		}
	}
1618

Mark Andrews's avatar
Mark Andrews committed
1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641
	FD_ZERO(&rfds);
	FD_ZERO(&wfds);

	FD_SET(0, &rfds);
	maxfd = 0;
	rhandlers[0] = readstdin;

	udp4 = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if (udp4 >= 0) {
		FD_SET(udp4, &rfds);
		if (udp4 > maxfd)
			maxfd = udp4;
		rhandlers[udp4] = udpread;
	}

	udp6 = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);
	if (udp6 >= 0) {
		FD_SET(udp6, &rfds);
		if (udp6 > maxfd)
			maxfd = udp6;
		rhandlers[udp6] = udpread;
	}

Mark Andrews's avatar
Mark Andrews committed
1642 1643 1644 1645 1646 1647
	res_init();

	/*
	 * If we haven't been given recursive servers to use the
	 * get the system's default servers.
	 */
1648 1649 1650
	if (!nservers) 
		nservers = res_getservers(&_res, servers,
					  sizeof(servers)/sizeof(servers[0]));
1651

Mark Andrews's avatar
Mark Andrews committed
1652 1653 1654
	/*
	 * Main work loop.
	 */
Mark Andrews's avatar
Mark Andrews committed
1655 1656 1657 1658 1659
	do {
		FD_COPY(&rfds, &myrfds);
		FD_COPY(&wfds, &mywfds);
		nfds = maxfd + 1;
		if (item) {
1660
			to.tv_sec = item->when.tv_sec - now.tv_sec;
Mark Andrews's avatar
Mark Andrews committed
1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672
			to.tv_usec = item->when.tv_usec - now.tv_usec;
			if (to.tv_usec < 0) {
				to.tv_usec += 1000000;
				to.tv_sec -= 1;
			}
			if (to.tv_sec < 0) {
				to.tv_sec = 0;
				to.tv_usec = 0;
			}
			tpo = &to;
		} else
			tpo = NULL;
Mark Andrews's avatar
Mark Andrews committed
1673 1674 1675 1676

		/*
		 * Too much outstanding work stop looking for more.
		 */
1677 1678
		if (outstanding > maxoutstanding/2)
			FD_CLR(0, &myrfds);
Mark Andrews's avatar
Mark Andrews committed
1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689
		n = select(nfds, &myrfds, &mywfds, NULL, tpo);
		if (n > 0) {
			for (fd = 0; fd <= maxfd; fd++) {
				if (FD_ISSET(fd, &myrfds) &&
				    rhandlers[fd] != NULL) 
					(*rhandlers[fd])(fd);
				if (FD_ISSET(fd, &mywfds) &&
				    whandlers[fd] != NULL) 
					(*whandlers[fd])(fd);
			}
		}
Mark Andrews's avatar
Mark Andrews committed
1690 1691 1692 1693 1694

		/*
		 * Find the next item that needs to be handled on the
		 * three work queues.  Also timeout / resend if approriate.
		 */
Mark Andrews's avatar
Mark Andrews committed
1695
		item = HEAD(work);
1696 1697 1698
		ritem = HEAD(reading);
		citem = HEAD(connecting);
		if (item || citem || ritem)
Mark Andrews's avatar
Mark Andrews committed
1699
			gettimeofday(&now, NULL);
Mark Andrews's avatar
Mark Andrews committed
1700 1701 1702 1703

		/*
		 * UDP work queue.
		 */
Mark Andrews's avatar
Mark Andrews committed
1704
		while (item) {
1705 1706
			if (item->when.tv_sec > now.tv_sec ||
			    (item->when.tv_sec == now.tv_sec &&
Mark Andrews's avatar
Mark Andrews committed
1707 1708 1709 1710
			     item->when.tv_usec > now.tv_usec))
				break;
			if (item->sends < 3) {
				resend(item);
Mark Andrews's avatar