xref: /freebsd/lib/libpfctl/libpfctl.c (revision 5fb307d29b364982acbde82cbf77db3cae486f8c)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2021 Rubicon Communications, LLC (Netgate)
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  *
11  *    - Redistributions of source code must retain the above copyright
12  *      notice, this list of conditions and the following disclaimer.
13  *    - Redistributions in binary form must reproduce the above
14  *      copyright notice, this list of conditions and the following
15  *      disclaimer in the documentation and/or other materials provided
16  *      with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
26  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
28  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 #include <sys/cdefs.h>
33 
34 #include <sys/ioctl.h>
35 #include <sys/nv.h>
36 #include <sys/queue.h>
37 #include <sys/types.h>
38 
39 #include <net/if.h>
40 #include <net/pfvar.h>
41 #include <netinet/in.h>
42 
43 #include <netpfil/pf/pf_nl.h>
44 #include <netlink/netlink.h>
45 #include <netlink/netlink_generic.h>
46 #include <netlink/netlink_snl.h>
47 #include <netlink/netlink_snl_generic.h>
48 #include <netlink/netlink_snl_route.h>
49 
50 #include <assert.h>
51 #include <err.h>
52 #include <errno.h>
53 #include <stdlib.h>
54 #include <string.h>
55 
56 #include "libpfctl.h"
57 
58 const char* PFCTL_SYNCOOKIES_MODE_NAMES[] = {
59 	"never",
60 	"always",
61 	"adaptive"
62 };
63 
64 static int	_pfctl_clear_states(int , const struct pfctl_kill *,
65 		    unsigned int *, uint64_t);
66 
67 static int
68 pfctl_do_ioctl(int dev, uint cmd, size_t size, nvlist_t **nvl)
69 {
70 	struct pfioc_nv nv;
71 	void *data;
72 	size_t nvlen;
73 	int ret;
74 
75 	data = nvlist_pack(*nvl, &nvlen);
76 	if (nvlen > size)
77 		size = nvlen;
78 
79 retry:
80 	nv.data = malloc(size);
81 	if (nv.data == NULL) {
82 		ret = ENOMEM;
83 		goto out;
84 	}
85 
86 	memcpy(nv.data, data, nvlen);
87 
88 	nv.len = nvlen;
89 	nv.size = size;
90 
91 	ret = ioctl(dev, cmd, &nv);
92 	if (ret == -1 && errno == ENOSPC) {
93 		size *= 2;
94 		free(nv.data);
95 		goto retry;
96 	}
97 
98 	nvlist_destroy(*nvl);
99 	*nvl = NULL;
100 
101 	if (ret == 0) {
102 		*nvl = nvlist_unpack(nv.data, nv.len, 0);
103 		if (*nvl == NULL) {
104 			ret = EIO;
105 			goto out;
106 		}
107 	} else {
108 		ret = errno;
109 	}
110 
111 out:
112 	free(data);
113 	free(nv.data);
114 
115 	return (ret);
116 }
117 
118 static void
119 pf_nvuint_8_array(const nvlist_t *nvl, const char *name, size_t maxelems,
120     uint8_t *numbers, size_t *nelems)
121 {
122 	const uint64_t *tmp;
123 	size_t elems;
124 
125 	tmp = nvlist_get_number_array(nvl, name, &elems);
126 	assert(elems <= maxelems);
127 
128 	for (size_t i = 0; i < elems; i++)
129 		numbers[i] = tmp[i];
130 
131 	if (nelems)
132 		*nelems = elems;
133 }
134 
135 static void
136 pf_nvuint_16_array(const nvlist_t *nvl, const char *name, size_t maxelems,
137     uint16_t *numbers, size_t *nelems)
138 {
139 	const uint64_t *tmp;
140 	size_t elems;
141 
142 	tmp = nvlist_get_number_array(nvl, name, &elems);
143 	assert(elems <= maxelems);
144 
145 	for (size_t i = 0; i < elems; i++)
146 		numbers[i] = tmp[i];
147 
148 	if (nelems)
149 		*nelems = elems;
150 }
151 
152 static void
153 pf_nvuint_32_array(const nvlist_t *nvl, const char *name, size_t maxelems,
154     uint32_t *numbers, size_t *nelems)
155 {
156 	const uint64_t *tmp;
157 	size_t elems;
158 
159 	tmp = nvlist_get_number_array(nvl, name, &elems);
160 
161 	for (size_t i = 0; i < elems && i < maxelems; i++)
162 		numbers[i] = tmp[i];
163 
164 	if (nelems)
165 		*nelems = elems;
166 }
167 
168 static void
169 pf_nvuint_64_array(const nvlist_t *nvl, const char *name, size_t maxelems,
170     uint64_t *numbers, size_t *nelems)
171 {
172 	const uint64_t *tmp;
173 	size_t elems;
174 
175 	tmp = nvlist_get_number_array(nvl, name, &elems);
176 	assert(elems <= maxelems);
177 
178 	for (size_t i = 0; i < elems; i++)
179 		numbers[i] = tmp[i];
180 
181 	if (nelems)
182 		*nelems = elems;
183 }
184 
185 int
186 pfctl_startstop(int start)
187 {
188 	struct snl_state ss = {};
189 	struct snl_errmsg_data e = {};
190 	struct snl_writer nw;
191 	struct nlmsghdr *hdr;
192 	uint32_t seq_id;
193 	int family_id;
194 
195 	snl_init(&ss, NETLINK_GENERIC);
196 	family_id = snl_get_genl_family(&ss, PFNL_FAMILY_NAME);
197 	if (family_id == 0)
198 		return (ENOTSUP);
199 
200 	snl_init_writer(&ss, &nw);
201 	hdr = snl_create_genl_msg_request(&nw, family_id,
202 	    start ? PFNL_CMD_START : PFNL_CMD_STOP);
203 
204 	hdr = snl_finalize_msg(&nw);
205 	if (hdr == NULL)
206 		return (ENOMEM);
207 	seq_id = hdr->nlmsg_seq;
208 
209 	snl_send_message(&ss, hdr);
210 
211 	while ((hdr = snl_read_reply_multi(&ss, seq_id, &e)) != NULL) {
212 	}
213 
214 	return (e.error);
215 }
216 
217 static void
218 _pfctl_get_status_counters(const nvlist_t *nvl,
219     struct pfctl_status_counters *counters)
220 {
221 	const uint64_t		*ids, *counts;
222 	const char *const	*names;
223 	size_t id_len, counter_len, names_len;
224 
225 	ids = nvlist_get_number_array(nvl, "ids", &id_len);
226 	counts = nvlist_get_number_array(nvl, "counters", &counter_len);
227 	names = nvlist_get_string_array(nvl, "names", &names_len);
228 	assert(id_len == counter_len);
229 	assert(counter_len == names_len);
230 
231 	TAILQ_INIT(counters);
232 
233 	for (size_t i = 0; i < id_len; i++) {
234 		struct pfctl_status_counter *c;
235 
236 		c = malloc(sizeof(*c));
237 		if (c == NULL)
238 			continue;
239 
240 		c->id = ids[i];
241 		c->counter = counts[i];
242 		c->name = strdup(names[i]);
243 
244 		TAILQ_INSERT_TAIL(counters, c, entry);
245 	}
246 }
247 
248 struct pfctl_status *
249 pfctl_get_status(int dev)
250 {
251 	struct pfctl_status	*status;
252 	nvlist_t	*nvl;
253 	size_t		 len;
254 	const void	*chksum;
255 
256 	status = calloc(1, sizeof(*status));
257 	if (status == NULL)
258 		return (NULL);
259 
260 	nvl = nvlist_create(0);
261 
262 	if (pfctl_do_ioctl(dev, DIOCGETSTATUSNV, 4096, &nvl)) {
263 		nvlist_destroy(nvl);
264 		free(status);
265 		return (NULL);
266 	}
267 
268 	status->running = nvlist_get_bool(nvl, "running");
269 	status->since = nvlist_get_number(nvl, "since");
270 	status->debug = nvlist_get_number(nvl, "debug");
271 	status->hostid = ntohl(nvlist_get_number(nvl, "hostid"));
272 	status->states = nvlist_get_number(nvl, "states");
273 	status->src_nodes = nvlist_get_number(nvl, "src_nodes");
274 	status->syncookies_active = nvlist_get_bool(nvl, "syncookies_active");
275 	status->reass = nvlist_get_number(nvl, "reass");
276 
277 	strlcpy(status->ifname, nvlist_get_string(nvl, "ifname"),
278 	    IFNAMSIZ);
279 	chksum = nvlist_get_binary(nvl, "chksum", &len);
280 	assert(len == PF_MD5_DIGEST_LENGTH);
281 	memcpy(status->pf_chksum, chksum, len);
282 
283 	_pfctl_get_status_counters(nvlist_get_nvlist(nvl, "counters"),
284 	    &status->counters);
285 	_pfctl_get_status_counters(nvlist_get_nvlist(nvl, "lcounters"),
286 	    &status->lcounters);
287 	_pfctl_get_status_counters(nvlist_get_nvlist(nvl, "fcounters"),
288 	    &status->fcounters);
289 	_pfctl_get_status_counters(nvlist_get_nvlist(nvl, "scounters"),
290 	    &status->scounters);
291 
292 	pf_nvuint_64_array(nvl, "pcounters", 2 * 2 * 3,
293 	    (uint64_t *)status->pcounters, NULL);
294 	pf_nvuint_64_array(nvl, "bcounters", 2 * 2,
295 	    (uint64_t *)status->bcounters, NULL);
296 
297 	nvlist_destroy(nvl);
298 
299 	return (status);
300 }
301 
302 static uint64_t
303 _pfctl_status_counter(struct pfctl_status_counters *counters, uint64_t id)
304 {
305 	struct pfctl_status_counter *c;
306 
307 	TAILQ_FOREACH(c, counters, entry) {
308 		if (c->id == id)
309 			return (c->counter);
310 	}
311 
312 	return (0);
313 }
314 
315 uint64_t
316 pfctl_status_counter(struct pfctl_status *status, int id)
317 {
318 	return (_pfctl_status_counter(&status->counters, id));
319 }
320 
321 uint64_t
322 pfctl_status_lcounter(struct pfctl_status *status, int id)
323 {
324 	return (_pfctl_status_counter(&status->lcounters, id));
325 }
326 
327 uint64_t
328 pfctl_status_fcounter(struct pfctl_status *status, int id)
329 {
330 	return (_pfctl_status_counter(&status->fcounters, id));
331 }
332 
333 uint64_t
334 pfctl_status_scounter(struct pfctl_status *status, int id)
335 {
336 	return (_pfctl_status_counter(&status->scounters, id));
337 }
338 
339 void
340 pfctl_free_status(struct pfctl_status *status)
341 {
342 	struct pfctl_status_counter *c, *tmp;
343 
344 	if (status == NULL)
345 		return;
346 
347 	TAILQ_FOREACH_SAFE(c, &status->counters, entry, tmp) {
348 		free(c->name);
349 		free(c);
350 	}
351 	TAILQ_FOREACH_SAFE(c, &status->lcounters, entry, tmp) {
352 		free(c->name);
353 		free(c);
354 	}
355 	TAILQ_FOREACH_SAFE(c, &status->fcounters, entry, tmp) {
356 		free(c->name);
357 		free(c);
358 	}
359 	TAILQ_FOREACH_SAFE(c, &status->scounters, entry, tmp) {
360 		free(c->name);
361 		free(c);
362 	}
363 
364 	free(status);
365 }
366 
367 static void
368 pfctl_nv_add_addr(nvlist_t *nvparent, const char *name,
369     const struct pf_addr *addr)
370 {
371 	nvlist_t *nvl = nvlist_create(0);
372 
373 	nvlist_add_binary(nvl, "addr", addr, sizeof(*addr));
374 
375 	nvlist_add_nvlist(nvparent, name, nvl);
376 	nvlist_destroy(nvl);
377 }
378 
379 static void
380 pf_nvaddr_to_addr(const nvlist_t *nvl, struct pf_addr *addr)
381 {
382 	size_t len;
383 	const void *data;
384 
385 	data = nvlist_get_binary(nvl, "addr", &len);
386 	assert(len == sizeof(struct pf_addr));
387 	memcpy(addr, data, len);
388 }
389 
390 static void
391 pfctl_nv_add_addr_wrap(nvlist_t *nvparent, const char *name,
392     const struct pf_addr_wrap *addr)
393 {
394 	nvlist_t *nvl = nvlist_create(0);
395 
396 	nvlist_add_number(nvl, "type", addr->type);
397 	nvlist_add_number(nvl, "iflags", addr->iflags);
398 	if (addr->type == PF_ADDR_DYNIFTL)
399 		nvlist_add_string(nvl, "ifname", addr->v.ifname);
400 	if (addr->type == PF_ADDR_TABLE)
401 		nvlist_add_string(nvl, "tblname", addr->v.tblname);
402 	pfctl_nv_add_addr(nvl, "addr", &addr->v.a.addr);
403 	pfctl_nv_add_addr(nvl, "mask", &addr->v.a.mask);
404 
405 	nvlist_add_nvlist(nvparent, name, nvl);
406 	nvlist_destroy(nvl);
407 }
408 
409 static void
410 pf_nvaddr_wrap_to_addr_wrap(const nvlist_t *nvl, struct pf_addr_wrap *addr)
411 {
412 	bzero(addr, sizeof(*addr));
413 
414 	addr->type = nvlist_get_number(nvl, "type");
415 	addr->iflags = nvlist_get_number(nvl, "iflags");
416 	if (addr->type == PF_ADDR_DYNIFTL) {
417 		strlcpy(addr->v.ifname, nvlist_get_string(nvl, "ifname"),
418 		    IFNAMSIZ);
419 		addr->p.dyncnt = nvlist_get_number(nvl, "dyncnt");
420 	}
421 	if (addr->type == PF_ADDR_TABLE) {
422 		strlcpy(addr->v.tblname, nvlist_get_string(nvl, "tblname"),
423 		    PF_TABLE_NAME_SIZE);
424 		addr->p.tblcnt = nvlist_get_number(nvl, "tblcnt");
425 	}
426 
427 	pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "addr"), &addr->v.a.addr);
428 	pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "mask"), &addr->v.a.mask);
429 }
430 
431 static void
432 pfctl_nv_add_rule_addr(nvlist_t *nvparent, const char *name,
433     const struct pf_rule_addr *addr)
434 {
435 	uint64_t ports[2];
436 	nvlist_t *nvl = nvlist_create(0);
437 
438 	pfctl_nv_add_addr_wrap(nvl, "addr", &addr->addr);
439 	ports[0] = addr->port[0];
440 	ports[1] = addr->port[1];
441 	nvlist_add_number_array(nvl, "port", ports, 2);
442 	nvlist_add_number(nvl, "neg", addr->neg);
443 	nvlist_add_number(nvl, "port_op", addr->port_op);
444 
445 	nvlist_add_nvlist(nvparent, name, nvl);
446 	nvlist_destroy(nvl);
447 }
448 
449 static void
450 pf_nvrule_addr_to_rule_addr(const nvlist_t *nvl, struct pf_rule_addr *addr)
451 {
452 	pf_nvaddr_wrap_to_addr_wrap(nvlist_get_nvlist(nvl, "addr"), &addr->addr);
453 
454 	pf_nvuint_16_array(nvl, "port", 2, addr->port, NULL);
455 	addr->neg = nvlist_get_number(nvl, "neg");
456 	addr->port_op = nvlist_get_number(nvl, "port_op");
457 }
458 
459 static void
460 pf_nvmape_to_mape(const nvlist_t *nvl, struct pf_mape_portset *mape)
461 {
462 	mape->offset = nvlist_get_number(nvl, "offset");
463 	mape->psidlen = nvlist_get_number(nvl, "psidlen");
464 	mape->psid = nvlist_get_number(nvl, "psid");
465 }
466 
467 static void
468 pf_nvpool_to_pool(const nvlist_t *nvl, struct pfctl_pool *pool)
469 {
470 	size_t len;
471 	const void *data;
472 
473 	data = nvlist_get_binary(nvl, "key", &len);
474 	assert(len == sizeof(pool->key));
475 	memcpy(&pool->key, data, len);
476 
477 	pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "counter"), &pool->counter);
478 
479 	pool->tblidx = nvlist_get_number(nvl, "tblidx");
480 	pf_nvuint_16_array(nvl, "proxy_port", 2, pool->proxy_port, NULL);
481 	pool->opts = nvlist_get_number(nvl, "opts");
482 
483 	if (nvlist_exists_nvlist(nvl, "mape"))
484 		pf_nvmape_to_mape(nvlist_get_nvlist(nvl, "mape"), &pool->mape);
485 }
486 
487 static void
488 pf_nvrule_uid_to_rule_uid(const nvlist_t *nvl, struct pf_rule_uid *uid)
489 {
490 	pf_nvuint_32_array(nvl, "uid", 2, uid->uid, NULL);
491 	uid->op = nvlist_get_number(nvl, "op");
492 }
493 
494 static void
495 pf_nvdivert_to_divert(const nvlist_t *nvl, struct pfctl_rule *rule)
496 {
497 	pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "addr"), &rule->divert.addr);
498 	rule->divert.port = nvlist_get_number(nvl, "port");
499 }
500 
501 static void
502 pf_nvrule_to_rule(const nvlist_t *nvl, struct pfctl_rule *rule)
503 {
504 	const uint64_t *skip;
505 	const char *const *labels;
506 	size_t skipcount, labelcount;
507 
508 	rule->nr = nvlist_get_number(nvl, "nr");
509 
510 	pf_nvrule_addr_to_rule_addr(nvlist_get_nvlist(nvl, "src"), &rule->src);
511 	pf_nvrule_addr_to_rule_addr(nvlist_get_nvlist(nvl, "dst"), &rule->dst);
512 
513 	skip = nvlist_get_number_array(nvl, "skip", &skipcount);
514 	assert(skip);
515 	assert(skipcount == PF_SKIP_COUNT);
516 	for (int i = 0; i < PF_SKIP_COUNT; i++)
517 		rule->skip[i].nr = skip[i];
518 
519 	labels = nvlist_get_string_array(nvl, "labels", &labelcount);
520 	assert(labelcount <= PF_RULE_MAX_LABEL_COUNT);
521 	for (size_t i = 0; i < labelcount; i++)
522 		strlcpy(rule->label[i], labels[i], PF_RULE_LABEL_SIZE);
523 	rule->ridentifier = nvlist_get_number(nvl, "ridentifier");
524 	strlcpy(rule->ifname, nvlist_get_string(nvl, "ifname"), IFNAMSIZ);
525 	strlcpy(rule->qname, nvlist_get_string(nvl, "qname"), PF_QNAME_SIZE);
526 	strlcpy(rule->pqname, nvlist_get_string(nvl, "pqname"), PF_QNAME_SIZE);
527 	strlcpy(rule->tagname, nvlist_get_string(nvl, "tagname"),
528 	    PF_TAG_NAME_SIZE);
529 	strlcpy(rule->match_tagname, nvlist_get_string(nvl, "match_tagname"),
530 	    PF_TAG_NAME_SIZE);
531 
532 	strlcpy(rule->overload_tblname, nvlist_get_string(nvl, "overload_tblname"),
533 	    PF_TABLE_NAME_SIZE);
534 
535 	pf_nvpool_to_pool(nvlist_get_nvlist(nvl, "rpool"), &rule->rpool);
536 
537 	rule->evaluations = nvlist_get_number(nvl, "evaluations");
538 	pf_nvuint_64_array(nvl, "packets", 2, rule->packets, NULL);
539 	pf_nvuint_64_array(nvl, "bytes", 2, rule->bytes, NULL);
540 
541 	if (nvlist_exists_number(nvl, "timestamp")) {
542 		rule->last_active_timestamp = nvlist_get_number(nvl, "timestamp");
543 	}
544 
545 	rule->os_fingerprint = nvlist_get_number(nvl, "os_fingerprint");
546 
547 	rule->rtableid = nvlist_get_number(nvl, "rtableid");
548 	pf_nvuint_32_array(nvl, "timeout", PFTM_MAX, rule->timeout, NULL);
549 	rule->max_states = nvlist_get_number(nvl, "max_states");
550 	rule->max_src_nodes = nvlist_get_number(nvl, "max_src_nodes");
551 	rule->max_src_states = nvlist_get_number(nvl, "max_src_states");
552 	rule->max_src_conn = nvlist_get_number(nvl, "max_src_conn");
553 	rule->max_src_conn_rate.limit =
554 	    nvlist_get_number(nvl, "max_src_conn_rate.limit");
555 	rule->max_src_conn_rate.seconds =
556 	    nvlist_get_number(nvl, "max_src_conn_rate.seconds");
557 	rule->qid = nvlist_get_number(nvl, "qid");
558 	rule->pqid = nvlist_get_number(nvl, "pqid");
559 	rule->dnpipe = nvlist_get_number(nvl, "dnpipe");
560 	rule->dnrpipe = nvlist_get_number(nvl, "dnrpipe");
561 	rule->free_flags = nvlist_get_number(nvl, "dnflags");
562 	rule->prob = nvlist_get_number(nvl, "prob");
563 	rule->cuid = nvlist_get_number(nvl, "cuid");
564 	rule->cpid = nvlist_get_number(nvl, "cpid");
565 
566 	rule->return_icmp = nvlist_get_number(nvl, "return_icmp");
567 	rule->return_icmp6 = nvlist_get_number(nvl, "return_icmp6");
568 	rule->max_mss = nvlist_get_number(nvl, "max_mss");
569 	rule->scrub_flags = nvlist_get_number(nvl, "scrub_flags");
570 
571 	pf_nvrule_uid_to_rule_uid(nvlist_get_nvlist(nvl, "uid"), &rule->uid);
572 	pf_nvrule_uid_to_rule_uid(nvlist_get_nvlist(nvl, "gid"),
573 	    (struct pf_rule_uid *)&rule->gid);
574 
575 	rule->rule_flag = nvlist_get_number(nvl, "rule_flag");
576 	rule->action = nvlist_get_number(nvl, "action");
577 	rule->direction = nvlist_get_number(nvl, "direction");
578 	rule->log = nvlist_get_number(nvl, "log");
579 	rule->logif = nvlist_get_number(nvl, "logif");
580 	rule->quick = nvlist_get_number(nvl, "quick");
581 	rule->ifnot = nvlist_get_number(nvl, "ifnot");
582 	rule->match_tag_not = nvlist_get_number(nvl, "match_tag_not");
583 	rule->natpass = nvlist_get_number(nvl, "natpass");
584 
585 	rule->keep_state = nvlist_get_number(nvl, "keep_state");
586 	rule->af = nvlist_get_number(nvl, "af");
587 	rule->proto = nvlist_get_number(nvl, "proto");
588 	rule->type = nvlist_get_number(nvl, "type");
589 	rule->code = nvlist_get_number(nvl, "code");
590 	rule->flags = nvlist_get_number(nvl, "flags");
591 	rule->flagset = nvlist_get_number(nvl, "flagset");
592 	rule->min_ttl = nvlist_get_number(nvl, "min_ttl");
593 	rule->allow_opts = nvlist_get_number(nvl, "allow_opts");
594 	rule->rt = nvlist_get_number(nvl, "rt");
595 	rule->return_ttl  = nvlist_get_number(nvl, "return_ttl");
596 	rule->tos = nvlist_get_number(nvl, "tos");
597 	rule->set_tos = nvlist_get_number(nvl, "set_tos");
598 	rule->anchor_relative = nvlist_get_number(nvl, "anchor_relative");
599 	rule->anchor_wildcard = nvlist_get_number(nvl, "anchor_wildcard");
600 
601 	rule->flush = nvlist_get_number(nvl, "flush");
602 	rule->prio = nvlist_get_number(nvl, "prio");
603 	pf_nvuint_8_array(nvl, "set_prio", 2, rule->set_prio, NULL);
604 
605 	pf_nvdivert_to_divert(nvlist_get_nvlist(nvl, "divert"), rule);
606 
607 	rule->states_cur = nvlist_get_number(nvl, "states_cur");
608 	rule->states_tot = nvlist_get_number(nvl, "states_tot");
609 	rule->src_nodes = nvlist_get_number(nvl, "src_nodes");
610 }
611 
612 static void
613 pfctl_nveth_addr_to_eth_addr(const nvlist_t *nvl, struct pfctl_eth_addr *addr)
614 {
615 	static const u_int8_t EMPTY_MAC[ETHER_ADDR_LEN] = { 0 };
616 	size_t len;
617 	const void *data;
618 
619 	data = nvlist_get_binary(nvl, "addr", &len);
620 	assert(len == sizeof(addr->addr));
621 	memcpy(addr->addr, data, sizeof(addr->addr));
622 
623 	data = nvlist_get_binary(nvl, "mask", &len);
624 	assert(len == sizeof(addr->mask));
625 	memcpy(addr->mask, data, sizeof(addr->mask));
626 
627 	addr->neg = nvlist_get_bool(nvl, "neg");
628 
629 	/* To make checks for 'is this address set?' easier. */
630 	addr->isset = memcmp(addr->addr, EMPTY_MAC, ETHER_ADDR_LEN) != 0;
631 }
632 
633 static nvlist_t *
634 pfctl_eth_addr_to_nveth_addr(const struct pfctl_eth_addr *addr)
635 {
636 	nvlist_t *nvl;
637 
638 	nvl = nvlist_create(0);
639 	if (nvl == NULL)
640 		return (NULL);
641 
642 	nvlist_add_bool(nvl, "neg", addr->neg);
643 	nvlist_add_binary(nvl, "addr", &addr->addr, ETHER_ADDR_LEN);
644 	nvlist_add_binary(nvl, "mask", &addr->mask, ETHER_ADDR_LEN);
645 
646 	return (nvl);
647 }
648 
649 static void
650 pfctl_nveth_rule_to_eth_rule(const nvlist_t *nvl, struct pfctl_eth_rule *rule)
651 {
652 	const char *const *labels;
653 	size_t labelcount, i;
654 
655 	rule->nr = nvlist_get_number(nvl, "nr");
656 	rule->quick = nvlist_get_bool(nvl, "quick");
657 	strlcpy(rule->ifname, nvlist_get_string(nvl, "ifname"), IFNAMSIZ);
658 	rule->ifnot = nvlist_get_bool(nvl, "ifnot");
659 	rule->direction = nvlist_get_number(nvl, "direction");
660 	rule->proto = nvlist_get_number(nvl, "proto");
661 	strlcpy(rule->match_tagname, nvlist_get_string(nvl, "match_tagname"),
662 	    PF_TAG_NAME_SIZE);
663 	rule->match_tag = nvlist_get_number(nvl, "match_tag");
664 	rule->match_tag_not = nvlist_get_bool(nvl, "match_tag_not");
665 
666 	labels = nvlist_get_string_array(nvl, "labels", &labelcount);
667 	assert(labelcount <= PF_RULE_MAX_LABEL_COUNT);
668 	for (i = 0; i < labelcount; i++)
669 		strlcpy(rule->label[i], labels[i], PF_RULE_LABEL_SIZE);
670 	rule->ridentifier = nvlist_get_number(nvl, "ridentifier");
671 
672 	pfctl_nveth_addr_to_eth_addr(nvlist_get_nvlist(nvl, "src"),
673 	    &rule->src);
674 	pfctl_nveth_addr_to_eth_addr(nvlist_get_nvlist(nvl, "dst"),
675 	    &rule->dst);
676 
677 	pf_nvrule_addr_to_rule_addr(nvlist_get_nvlist(nvl, "ipsrc"),
678 	    &rule->ipsrc);
679 	pf_nvrule_addr_to_rule_addr(nvlist_get_nvlist(nvl, "ipdst"),
680 	    &rule->ipdst);
681 
682 	rule->evaluations = nvlist_get_number(nvl, "evaluations");
683 	rule->packets[0] = nvlist_get_number(nvl, "packets-in");
684 	rule->packets[1] = nvlist_get_number(nvl, "packets-out");
685 	rule->bytes[0] = nvlist_get_number(nvl, "bytes-in");
686 	rule->bytes[1] = nvlist_get_number(nvl, "bytes-out");
687 
688 	if (nvlist_exists_number(nvl, "timestamp")) {
689 		rule->last_active_timestamp = nvlist_get_number(nvl, "timestamp");
690 	}
691 
692 	strlcpy(rule->qname, nvlist_get_string(nvl, "qname"), PF_QNAME_SIZE);
693 	strlcpy(rule->tagname, nvlist_get_string(nvl, "tagname"),
694 	    PF_TAG_NAME_SIZE);
695 
696 	rule->dnpipe = nvlist_get_number(nvl, "dnpipe");
697 	rule->dnflags = nvlist_get_number(nvl, "dnflags");
698 
699 	rule->anchor_relative = nvlist_get_number(nvl, "anchor_relative");
700 	rule->anchor_wildcard = nvlist_get_number(nvl, "anchor_wildcard");
701 
702 	strlcpy(rule->bridge_to, nvlist_get_string(nvl, "bridge_to"),
703 	    IFNAMSIZ);
704 
705 	rule->action = nvlist_get_number(nvl, "action");
706 }
707 
708 int
709 pfctl_get_eth_rulesets_info(int dev, struct pfctl_eth_rulesets_info *ri,
710     const char *path)
711 {
712 	nvlist_t *nvl;
713 	int ret;
714 
715 	bzero(ri, sizeof(*ri));
716 
717 	nvl = nvlist_create(0);
718 	nvlist_add_string(nvl, "path", path);
719 
720 	if ((ret = pfctl_do_ioctl(dev, DIOCGETETHRULESETS, 256, &nvl)) != 0)
721 		goto out;
722 
723 	ri->nr = nvlist_get_number(nvl, "nr");
724 
725 out:
726 	nvlist_destroy(nvl);
727 	return (ret);
728 }
729 
730 int
731 pfctl_get_eth_ruleset(int dev, const char *path, int nr,
732     struct pfctl_eth_ruleset_info *ri)
733 {
734 	nvlist_t *nvl;
735 	int ret;
736 
737 	bzero(ri, sizeof(*ri));
738 
739 	nvl = nvlist_create(0);
740 	nvlist_add_string(nvl, "path", path);
741 	nvlist_add_number(nvl, "nr", nr);
742 
743 	if ((ret = pfctl_do_ioctl(dev, DIOCGETETHRULESET, 1024, &nvl)) != 0)
744 		goto out;
745 
746 	ri->nr = nvlist_get_number(nvl, "nr");
747 	strlcpy(ri->path, nvlist_get_string(nvl, "path"), MAXPATHLEN);
748 	strlcpy(ri->name, nvlist_get_string(nvl, "name"),
749 	    PF_ANCHOR_NAME_SIZE);
750 
751 out:
752 	nvlist_destroy(nvl);
753 	return (ret);
754 }
755 
756 int
757 pfctl_get_eth_rules_info(int dev, struct pfctl_eth_rules_info *rules,
758     const char *path)
759 {
760 	nvlist_t *nvl;
761 	int ret;
762 
763 	bzero(rules, sizeof(*rules));
764 
765 	nvl = nvlist_create(0);
766 	nvlist_add_string(nvl, "anchor", path);
767 
768 	if ((ret = pfctl_do_ioctl(dev, DIOCGETETHRULES, 1024, &nvl)) != 0)
769 		goto out;
770 
771 	rules->nr = nvlist_get_number(nvl, "nr");
772 	rules->ticket = nvlist_get_number(nvl, "ticket");
773 
774 out:
775 	nvlist_destroy(nvl);
776 	return (ret);
777 }
778 
779 int
780 pfctl_get_eth_rule(int dev, uint32_t nr, uint32_t ticket,
781     const char *path, struct pfctl_eth_rule *rule, bool clear,
782     char *anchor_call)
783 {
784 	nvlist_t *nvl;
785 	int ret;
786 
787 	nvl = nvlist_create(0);
788 
789 	nvlist_add_string(nvl, "anchor", path);
790 	nvlist_add_number(nvl, "ticket", ticket);
791 	nvlist_add_number(nvl, "nr", nr);
792 	nvlist_add_bool(nvl, "clear", clear);
793 
794 	if ((ret = pfctl_do_ioctl(dev, DIOCGETETHRULE, 4096, &nvl)) != 0)
795 		goto out;
796 
797 	pfctl_nveth_rule_to_eth_rule(nvl, rule);
798 
799 	if (anchor_call)
800 		strlcpy(anchor_call, nvlist_get_string(nvl, "anchor_call"),
801 		    MAXPATHLEN);
802 
803 out:
804 	nvlist_destroy(nvl);
805 	return (ret);
806 }
807 
808 int
809 pfctl_add_eth_rule(int dev, const struct pfctl_eth_rule *r, const char *anchor,
810     const char *anchor_call, uint32_t ticket)
811 {
812 	struct pfioc_nv nv;
813 	nvlist_t *nvl, *addr;
814 	void *packed;
815 	int error = 0;
816 	size_t labelcount, size;
817 
818 	nvl = nvlist_create(0);
819 
820 	nvlist_add_number(nvl, "ticket", ticket);
821 	nvlist_add_string(nvl, "anchor", anchor);
822 	nvlist_add_string(nvl, "anchor_call", anchor_call);
823 
824 	nvlist_add_number(nvl, "nr", r->nr);
825 	nvlist_add_bool(nvl, "quick", r->quick);
826 	nvlist_add_string(nvl, "ifname", r->ifname);
827 	nvlist_add_bool(nvl, "ifnot", r->ifnot);
828 	nvlist_add_number(nvl, "direction", r->direction);
829 	nvlist_add_number(nvl, "proto", r->proto);
830 	nvlist_add_string(nvl, "match_tagname", r->match_tagname);
831 	nvlist_add_bool(nvl, "match_tag_not", r->match_tag_not);
832 
833 	addr = pfctl_eth_addr_to_nveth_addr(&r->src);
834 	if (addr == NULL) {
835 		nvlist_destroy(nvl);
836 		return (ENOMEM);
837 	}
838 	nvlist_add_nvlist(nvl, "src", addr);
839 	nvlist_destroy(addr);
840 
841 	addr = pfctl_eth_addr_to_nveth_addr(&r->dst);
842 	if (addr == NULL) {
843 		nvlist_destroy(nvl);
844 		return (ENOMEM);
845 	}
846 	nvlist_add_nvlist(nvl, "dst", addr);
847 	nvlist_destroy(addr);
848 
849 	pfctl_nv_add_rule_addr(nvl, "ipsrc", &r->ipsrc);
850 	pfctl_nv_add_rule_addr(nvl, "ipdst", &r->ipdst);
851 
852 	labelcount = 0;
853 	while (labelcount < PF_RULE_MAX_LABEL_COUNT &&
854 	    r->label[labelcount][0] != 0) {
855 		nvlist_append_string_array(nvl, "labels",
856 		    r->label[labelcount]);
857 		labelcount++;
858 	}
859 	nvlist_add_number(nvl, "ridentifier", r->ridentifier);
860 
861 	nvlist_add_string(nvl, "qname", r->qname);
862 	nvlist_add_string(nvl, "tagname", r->tagname);
863 	nvlist_add_number(nvl, "dnpipe", r->dnpipe);
864 	nvlist_add_number(nvl, "dnflags", r->dnflags);
865 
866 	nvlist_add_string(nvl, "bridge_to", r->bridge_to);
867 
868 	nvlist_add_number(nvl, "action", r->action);
869 
870 	packed = nvlist_pack(nvl, &size);
871 	if (packed == NULL) {
872 		nvlist_destroy(nvl);
873 		return (ENOMEM);
874 	}
875 
876 	nv.len = size;
877 	nv.size = size;
878 	nv.data = packed;
879 
880 	if (ioctl(dev, DIOCADDETHRULE, &nv) != 0)
881 		error = errno;
882 
883 	free(packed);
884 	nvlist_destroy(nvl);
885 
886 	return (error);
887 }
888 
889 static void
890 snl_add_msg_attr_addr_wrap(struct snl_writer *nw, uint32_t type, const struct pf_addr_wrap *addr)
891 {
892 	int off;
893 
894 	off = snl_add_msg_attr_nested(nw, type);
895 
896 	snl_add_msg_attr_ip6(nw, PF_AT_ADDR, &addr->v.a.addr.v6);
897 	snl_add_msg_attr_ip6(nw, PF_AT_MASK, &addr->v.a.mask.v6);
898 
899 	if (addr->type == PF_ADDR_DYNIFTL)
900 		snl_add_msg_attr_string(nw, PF_AT_IFNAME, addr->v.ifname);
901 	if (addr->type == PF_ADDR_TABLE)
902 		snl_add_msg_attr_string(nw, PF_AT_TABLENAME, addr->v.tblname);
903 	snl_add_msg_attr_u8(nw, PF_AT_TYPE, addr->type);
904 	snl_add_msg_attr_u8(nw, PF_AT_IFLAGS, addr->iflags);
905 
906 	snl_end_attr_nested(nw, off);
907 }
908 
909 static void
910 snl_add_msg_attr_rule_addr(struct snl_writer *nw, uint32_t type, const struct pf_rule_addr *addr)
911 {
912 	int off;
913 
914 	off = snl_add_msg_attr_nested(nw, type);
915 
916 	snl_add_msg_attr_addr_wrap(nw, PF_RAT_ADDR, &addr->addr);
917 	snl_add_msg_attr_u16(nw, PF_RAT_SRC_PORT, addr->port[0]);
918 	snl_add_msg_attr_u16(nw, PF_RAT_DST_PORT, addr->port[1]);
919 	snl_add_msg_attr_u8(nw, PF_RAT_NEG, addr->neg);
920 	snl_add_msg_attr_u8(nw, PF_RAT_OP, addr->port_op);
921 
922 	snl_end_attr_nested(nw, off);
923 }
924 
925 static void
926 snl_add_msg_attr_rule_labels(struct snl_writer *nw, uint32_t type, const char labels[PF_RULE_MAX_LABEL_COUNT][PF_RULE_LABEL_SIZE])
927 {
928 	int off, i = 0;
929 
930 	off = snl_add_msg_attr_nested(nw, type);
931 
932 	while (labels[i][0] != 0 &&
933 	    i < PF_RULE_MAX_LABEL_COUNT) {
934 		snl_add_msg_attr_string(nw, PF_LT_LABEL, labels[i]);
935 		i++;
936 	}
937 
938 	snl_end_attr_nested(nw, off);
939 }
940 
941 static void
942 snl_add_msg_attr_mape(struct snl_writer *nw, uint32_t type, const struct pf_mape_portset *me)
943 {
944 	int off;
945 
946 	off = snl_add_msg_attr_nested(nw, type);
947 
948 	snl_add_msg_attr_u8(nw, PF_MET_OFFSET, me->offset);
949 	snl_add_msg_attr_u8(nw, PF_MET_PSID_LEN, me->psidlen);
950 	snl_add_msg_attr_u16(nw, PF_MET_PSID, me->psid);
951 
952 	snl_end_attr_nested(nw, off);
953 }
954 
955 static void
956 snl_add_msg_attr_rpool(struct snl_writer *nw, uint32_t type, const struct pfctl_pool *pool)
957 {
958 	int off;
959 
960 	off = snl_add_msg_attr_nested(nw, type);
961 
962 	snl_add_msg_attr(nw, PF_PT_KEY, sizeof(pool->key), &pool->key);
963 	snl_add_msg_attr_ip6(nw, PF_PT_COUNTER, &pool->counter.v6);
964 	snl_add_msg_attr_u32(nw, PF_PT_TBLIDX, pool->tblidx);
965 	snl_add_msg_attr_u16(nw, PF_PT_PROXY_SRC_PORT, pool->proxy_port[0]);
966 	snl_add_msg_attr_u16(nw, PF_PT_PROXY_DST_PORT, pool->proxy_port[1]);
967 	snl_add_msg_attr_u8(nw, PF_PT_OPTS, pool->opts);
968 	snl_add_msg_attr_mape(nw, PF_PT_MAPE, &pool->mape);
969 
970 	snl_end_attr_nested(nw, off);
971 }
972 
973 static void
974 snl_add_msg_attr_timeouts(struct snl_writer *nw, uint32_t type, const uint32_t *timeouts)
975 {
976 	int off;
977 
978 	off = snl_add_msg_attr_nested(nw, type);
979 
980 	for (int i = 0; i < PFTM_MAX; i++)
981 		snl_add_msg_attr_u32(nw, PF_TT_TIMEOUT, timeouts[i]);
982 
983 	snl_end_attr_nested(nw, off);
984 }
985 
986 static void
987 snl_add_msg_attr_uid(struct snl_writer *nw, uint32_t type, const struct pf_rule_uid *uid)
988 {
989 	int off;
990 
991 	off = snl_add_msg_attr_nested(nw, type);
992 
993 	snl_add_msg_attr_u32(nw, PF_RUT_UID_LOW, uid->uid[0]);
994 	snl_add_msg_attr_u32(nw, PF_RUT_UID_HIGH, uid->uid[1]);
995 	snl_add_msg_attr_u8(nw, PF_RUT_OP, uid->op);
996 
997 	snl_end_attr_nested(nw, off);
998 }
999 
1000 static void
1001 snl_add_msg_attr_pf_rule(struct snl_writer *nw, uint32_t type, const struct pfctl_rule *r)
1002 {
1003 	int off;
1004 
1005 	off = snl_add_msg_attr_nested(nw, type);
1006 
1007 	snl_add_msg_attr_rule_addr(nw, PF_RT_SRC, &r->src);
1008 	snl_add_msg_attr_rule_addr(nw, PF_RT_DST, &r->dst);
1009 	snl_add_msg_attr_rule_labels(nw, PF_RT_LABELS, r->label);
1010 	snl_add_msg_attr_u32(nw, PF_RT_RIDENTIFIER, r->ridentifier);
1011 	snl_add_msg_attr_string(nw, PF_RT_IFNAME, r->ifname);
1012 	snl_add_msg_attr_string(nw, PF_RT_QNAME, r->qname);
1013 	snl_add_msg_attr_string(nw, PF_RT_PQNAME, r->pqname);
1014 	snl_add_msg_attr_string(nw, PF_RT_TAGNAME, r->tagname);
1015 	snl_add_msg_attr_string(nw, PF_RT_MATCH_TAGNAME, r->match_tagname);
1016 	snl_add_msg_attr_string(nw, PF_RT_OVERLOAD_TBLNAME, r->overload_tblname);
1017 	snl_add_msg_attr_rpool(nw, PF_RT_RPOOL, &r->rpool);
1018 	snl_add_msg_attr_u32(nw, PF_RT_OS_FINGERPRINT, r->os_fingerprint);
1019 	snl_add_msg_attr_u32(nw, PF_RT_RTABLEID, r->rtableid);
1020 	snl_add_msg_attr_timeouts(nw, PF_RT_TIMEOUT, r->timeout);
1021 	snl_add_msg_attr_u32(nw, PF_RT_MAX_STATES, r->max_states);
1022 	snl_add_msg_attr_u32(nw, PF_RT_MAX_SRC_NODES, r->max_src_nodes);
1023 	snl_add_msg_attr_u32(nw, PF_RT_MAX_SRC_STATES, r->max_src_states);
1024 	snl_add_msg_attr_u32(nw, PF_RT_MAX_SRC_CONN_RATE_LIMIT, r->max_src_conn_rate.limit);
1025 	snl_add_msg_attr_u32(nw, PF_RT_MAX_SRC_CONN_RATE_SECS, r->max_src_conn_rate.seconds);
1026 
1027 	snl_add_msg_attr_u16(nw, PF_RT_DNPIPE, r->dnpipe);
1028 	snl_add_msg_attr_u16(nw, PF_RT_DNRPIPE, r->dnrpipe);
1029 	snl_add_msg_attr_u32(nw, PF_RT_DNFLAGS, r->free_flags);
1030 
1031 	snl_add_msg_attr_u32(nw, PF_RT_NR, r->nr);
1032 	snl_add_msg_attr_u32(nw, PF_RT_PROB, r->prob);
1033 	snl_add_msg_attr_u32(nw, PF_RT_CUID, r->cuid);
1034 	snl_add_msg_attr_u32(nw, PF_RT_CPID, r->cpid);
1035 
1036 	snl_add_msg_attr_u16(nw, PF_RT_RETURN_ICMP, r->return_icmp);
1037 	snl_add_msg_attr_u16(nw, PF_RT_RETURN_ICMP6, r->return_icmp6);
1038 	snl_add_msg_attr_u16(nw, PF_RT_MAX_MSS, r->max_mss);
1039 	snl_add_msg_attr_u16(nw, PF_RT_SCRUB_FLAGS, r->scrub_flags);
1040 
1041 	snl_add_msg_attr_uid(nw, PF_RT_UID, &r->uid);
1042 	snl_add_msg_attr_uid(nw, PF_RT_GID, (const struct pf_rule_uid *)&r->gid);
1043 
1044 	snl_add_msg_attr_u32(nw, PF_RT_RULE_FLAG, r->rule_flag);
1045 	snl_add_msg_attr_u8(nw, PF_RT_ACTION, r->action);
1046 	snl_add_msg_attr_u8(nw, PF_RT_DIRECTION, r->direction);
1047 	snl_add_msg_attr_u8(nw, PF_RT_LOG, r->log);
1048 	snl_add_msg_attr_u8(nw, PF_RT_LOGIF, r->logif);
1049 	snl_add_msg_attr_u8(nw, PF_RT_QUICK, r->quick);
1050 	snl_add_msg_attr_u8(nw, PF_RT_IF_NOT, r->ifnot);
1051 	snl_add_msg_attr_u8(nw, PF_RT_MATCH_TAG_NOT, r->match_tag_not);
1052 	snl_add_msg_attr_u8(nw, PF_RT_NATPASS, r->natpass);
1053 	snl_add_msg_attr_u8(nw, PF_RT_KEEP_STATE, r->keep_state);
1054 	snl_add_msg_attr_u8(nw, PF_RT_AF, r->af);
1055 	snl_add_msg_attr_u8(nw, PF_RT_PROTO, r->proto);
1056 	snl_add_msg_attr_u8(nw, PF_RT_TYPE, r->type);
1057 	snl_add_msg_attr_u8(nw, PF_RT_CODE, r->code);
1058 	snl_add_msg_attr_u8(nw, PF_RT_FLAGS, r->flags);
1059 	snl_add_msg_attr_u8(nw, PF_RT_FLAGSET, r->flagset);
1060 	snl_add_msg_attr_u8(nw, PF_RT_MIN_TTL, r->min_ttl);
1061 	snl_add_msg_attr_u8(nw, PF_RT_ALLOW_OPTS, r->allow_opts);
1062 	snl_add_msg_attr_u8(nw, PF_RT_RT, r->rt);
1063 	snl_add_msg_attr_u8(nw, PF_RT_RETURN_TTL, r->return_ttl);
1064 	snl_add_msg_attr_u8(nw, PF_RT_TOS, r->tos);
1065 	snl_add_msg_attr_u8(nw, PF_RT_SET_TOS, r->set_tos);
1066 
1067 	snl_add_msg_attr_u8(nw, PF_RT_ANCHOR_RELATIVE, r->anchor_relative);
1068 	snl_add_msg_attr_u8(nw, PF_RT_ANCHOR_WILDCARD, r->anchor_wildcard);
1069 	snl_add_msg_attr_u8(nw, PF_RT_FLUSH, r->flush);
1070 	snl_add_msg_attr_u8(nw, PF_RT_PRIO, r->prio);
1071 	snl_add_msg_attr_u8(nw, PF_RT_SET_PRIO, r->set_prio[0]);
1072 	snl_add_msg_attr_u8(nw, PF_RT_SET_PRIO_REPLY, r->set_prio[1]);
1073 
1074 	snl_add_msg_attr_ip6(nw, PF_RT_DIVERT_ADDRESS, &r->divert.addr.v6);
1075 	snl_add_msg_attr_u16(nw, PF_RT_DIVERT_PORT, r->divert.port);
1076 
1077 	snl_end_attr_nested(nw, off);
1078 }
1079 
1080 int
1081 pfctl_add_rule(int dev __unused, const struct pfctl_rule *r, const char *anchor,
1082     const char *anchor_call, uint32_t ticket, uint32_t pool_ticket)
1083 {
1084 	struct snl_writer nw;
1085 	struct snl_state ss = {};
1086 	struct snl_errmsg_data e = {};
1087 	struct nlmsghdr *hdr;
1088 	uint32_t seq_id;
1089 	int family_id;
1090 
1091 	snl_init(&ss, NETLINK_GENERIC);
1092 	family_id = snl_get_genl_family(&ss, PFNL_FAMILY_NAME);
1093 	if (family_id == 0)
1094 		return (ENOTSUP);
1095 
1096 	snl_init_writer(&ss, &nw);
1097 	hdr = snl_create_genl_msg_request(&nw, family_id, PFNL_CMD_ADDRULE);
1098 	hdr->nlmsg_flags |= NLM_F_DUMP;
1099 	snl_add_msg_attr_u32(&nw, PF_ART_TICKET, ticket);
1100 	snl_add_msg_attr_u32(&nw, PF_ART_POOL_TICKET, pool_ticket);
1101 	snl_add_msg_attr_string(&nw, PF_ART_ANCHOR, anchor);
1102 	snl_add_msg_attr_string(&nw, PF_ART_ANCHOR_CALL, anchor_call);
1103 
1104 	snl_add_msg_attr_pf_rule(&nw, PF_ART_RULE, r);
1105 
1106 	if ((hdr = snl_finalize_msg(&nw)) == NULL)
1107 		return (ENXIO);
1108 
1109 	seq_id = hdr->nlmsg_seq;
1110 
1111 	if (! snl_send_message(&ss, hdr))
1112 		return (ENXIO);
1113 
1114 	while ((hdr = snl_read_reply_multi(&ss, seq_id, &e)) != NULL) {
1115 	}
1116 
1117 	return (e.error);
1118 }
1119 
1120 #define	_IN(_field)	offsetof(struct genlmsghdr, _field)
1121 #define	_OUT(_field)	offsetof(struct pfctl_rules_info, _field)
1122 static struct snl_attr_parser ap_getrules[] = {
1123 	{ .type = PF_GR_NR, .off = _OUT(nr), .cb = snl_attr_get_uint32 },
1124 	{ .type = PF_GR_TICKET, .off = _OUT(ticket), .cb = snl_attr_get_uint32 },
1125 };
1126 static struct snl_field_parser fp_getrules[] = {
1127 };
1128 #undef _IN
1129 #undef _OUT
1130 SNL_DECLARE_PARSER(getrules_parser, struct genlmsghdr, fp_getrules, ap_getrules);
1131 
1132 int
1133 pfctl_get_rules_info(int dev __unused, struct pfctl_rules_info *rules, uint32_t ruleset,
1134     const char *path)
1135 {
1136 	struct snl_state ss = {};
1137 	struct snl_errmsg_data e = {};
1138 	struct nlmsghdr *hdr;
1139 	struct snl_writer nw;
1140 	uint32_t seq_id;
1141 	int family_id;
1142 
1143 	snl_init(&ss, NETLINK_GENERIC);
1144 	family_id = snl_get_genl_family(&ss, PFNL_FAMILY_NAME);
1145 	if (family_id == 0)
1146 		return (ENOTSUP);
1147 
1148 	snl_init_writer(&ss, &nw);
1149 	hdr = snl_create_genl_msg_request(&nw, family_id, PFNL_CMD_GETRULES);
1150 	hdr->nlmsg_flags |= NLM_F_DUMP;
1151 
1152 	snl_add_msg_attr_string(&nw, PF_GR_ANCHOR, path);
1153 	snl_add_msg_attr_u8(&nw, PF_GR_ACTION, ruleset);
1154 
1155 	hdr = snl_finalize_msg(&nw);
1156 	if (hdr == NULL)
1157 		return (ENOMEM);
1158 
1159 	seq_id = hdr->nlmsg_seq;
1160 	if (! snl_send_message(&ss, hdr))
1161 		return (ENXIO);
1162 
1163 	while ((hdr = snl_read_reply_multi(&ss, seq_id, &e)) != NULL) {
1164 		if (! snl_parse_nlmsg(&ss, hdr, &getrules_parser, rules))
1165 			continue;
1166 	}
1167 
1168 	return (e.error);
1169 }
1170 
1171 int
1172 pfctl_get_rule(int dev, uint32_t nr, uint32_t ticket, const char *anchor,
1173     uint32_t ruleset, struct pfctl_rule *rule, char *anchor_call)
1174 {
1175 	return (pfctl_get_clear_rule(dev, nr, ticket, anchor, ruleset, rule,
1176 	    anchor_call, false));
1177 }
1178 
1179 int	pfctl_get_clear_rule(int dev, uint32_t nr, uint32_t ticket,
1180 	    const char *anchor, uint32_t ruleset, struct pfctl_rule *rule,
1181 	    char *anchor_call, bool clear)
1182 {
1183 	nvlist_t *nvl;
1184 	int ret;
1185 
1186 	nvl = nvlist_create(0);
1187 	if (nvl == 0)
1188 		return (ENOMEM);
1189 
1190 	nvlist_add_number(nvl, "nr", nr);
1191 	nvlist_add_number(nvl, "ticket", ticket);
1192 	nvlist_add_string(nvl, "anchor", anchor);
1193 	nvlist_add_number(nvl, "ruleset", ruleset);
1194 
1195 	if (clear)
1196 		nvlist_add_bool(nvl, "clear_counter", true);
1197 
1198 	if ((ret = pfctl_do_ioctl(dev, DIOCGETRULENV, 8192, &nvl)) != 0)
1199 		goto out;
1200 
1201 	pf_nvrule_to_rule(nvlist_get_nvlist(nvl, "rule"), rule);
1202 
1203 	if (anchor_call)
1204 		strlcpy(anchor_call, nvlist_get_string(nvl, "anchor_call"),
1205 		    MAXPATHLEN);
1206 
1207 out:
1208 	nvlist_destroy(nvl);
1209 	return (ret);
1210 }
1211 
1212 int
1213 pfctl_set_keepcounters(int dev, bool keep)
1214 {
1215 	struct pfioc_nv	 nv;
1216 	nvlist_t	*nvl;
1217 	int		 ret;
1218 
1219 	nvl = nvlist_create(0);
1220 
1221 	nvlist_add_bool(nvl, "keep_counters", keep);
1222 
1223 	nv.data = nvlist_pack(nvl, &nv.len);
1224 	nv.size = nv.len;
1225 
1226 	nvlist_destroy(nvl);
1227 
1228 	ret = ioctl(dev, DIOCKEEPCOUNTERS, &nv);
1229 
1230 	free(nv.data);
1231 	return (ret);
1232 }
1233 
1234 struct pfctl_creator {
1235 	uint32_t id;
1236 };
1237 #define	_IN(_field)	offsetof(struct genlmsghdr, _field)
1238 #define	_OUT(_field)	offsetof(struct pfctl_creator, _field)
1239 static struct snl_attr_parser ap_creators[] = {
1240 	{ .type = PF_ST_CREATORID, .off = _OUT(id), .cb = snl_attr_get_uint32 },
1241 };
1242 static struct snl_field_parser fp_creators[] = {
1243 };
1244 #undef _IN
1245 #undef _OUT
1246 SNL_DECLARE_PARSER(creator_parser, struct genlmsghdr, fp_creators, ap_creators);
1247 
1248 static int
1249 pfctl_get_creators_nl(struct snl_state *ss, uint32_t *creators, size_t *len)
1250 {
1251 
1252 	int family_id = snl_get_genl_family(ss, PFNL_FAMILY_NAME);
1253 	size_t i = 0;
1254 
1255 	struct nlmsghdr *hdr;
1256 	struct snl_writer nw;
1257 
1258 	if (family_id == 0)
1259 		return (ENOTSUP);
1260 
1261 	snl_init_writer(ss, &nw);
1262 	hdr = snl_create_genl_msg_request(&nw, family_id, PFNL_CMD_GETCREATORS);
1263 	hdr->nlmsg_flags |= NLM_F_DUMP;
1264 	hdr = snl_finalize_msg(&nw);
1265 	if (hdr == NULL)
1266 		return (ENOMEM);
1267 	uint32_t seq_id = hdr->nlmsg_seq;
1268 
1269 	snl_send_message(ss, hdr);
1270 
1271 	struct snl_errmsg_data e = {};
1272 	while ((hdr = snl_read_reply_multi(ss, seq_id, &e)) != NULL) {
1273 		struct pfctl_creator c;
1274 		bzero(&c, sizeof(c));
1275 
1276 		if (!snl_parse_nlmsg(ss, hdr, &creator_parser, &c))
1277 			continue;
1278 
1279 		creators[i] = c.id;
1280 		i++;
1281 		if (i > *len)
1282 			return (E2BIG);
1283 	}
1284 
1285 	*len = i;
1286 
1287 	return (0);
1288 }
1289 
1290 int
1291 pfctl_get_creatorids(uint32_t *creators, size_t *len)
1292 {
1293 	struct snl_state ss = {};
1294 	int error;
1295 
1296 	snl_init(&ss, NETLINK_GENERIC);
1297 	error = pfctl_get_creators_nl(&ss, creators, len);
1298 	snl_free(&ss);
1299 
1300 	return (error);
1301 
1302 }
1303 
1304 static void
1305 pfctl_nv_add_state_cmp(nvlist_t *nvl, const char *name,
1306     const struct pfctl_state_cmp *cmp)
1307 {
1308 	nvlist_t	*nv;
1309 
1310 	nv = nvlist_create(0);
1311 
1312 	nvlist_add_number(nv, "id", cmp->id);
1313 	nvlist_add_number(nv, "creatorid", htonl(cmp->creatorid));
1314 	nvlist_add_number(nv, "direction", cmp->direction);
1315 
1316 	nvlist_add_nvlist(nvl, name, nv);
1317 	nvlist_destroy(nv);
1318 }
1319 
1320 static inline bool
1321 snl_attr_get_pfaddr(struct snl_state *ss __unused, struct nlattr *nla,
1322     const void *arg __unused, void *target)
1323 {
1324 	memcpy(target, NLA_DATA(nla), NLA_DATA_LEN(nla));
1325 	return (true);
1326 }
1327 
1328 static inline bool
1329 snl_attr_store_ifname(struct snl_state *ss __unused, struct nlattr *nla,
1330     const void *arg __unused, void *target)
1331 {
1332 	size_t maxlen = NLA_DATA_LEN(nla);
1333 
1334 	if (strnlen((char *)NLA_DATA(nla), maxlen) < maxlen) {
1335 		strlcpy(target, (char *)NLA_DATA(nla), maxlen);
1336 		return (true);
1337 	}
1338 	return (false);
1339 }
1340 
1341 #define	_OUT(_field)	offsetof(struct pfctl_state_peer, _field)
1342 static const struct snl_attr_parser nla_p_speer[] = {
1343 	{ .type = PF_STP_SEQLO, .off = _OUT(seqlo), .cb = snl_attr_get_uint32 },
1344 	{ .type = PF_STP_SEQHI, .off = _OUT(seqhi), .cb = snl_attr_get_uint32 },
1345 	{ .type = PF_STP_SEQDIFF, .off = _OUT(seqdiff), .cb = snl_attr_get_uint32 },
1346 	{ .type = PF_STP_STATE, .off = _OUT(state), .cb = snl_attr_get_uint8 },
1347 	{ .type = PF_STP_WSCALE, .off = _OUT(wscale), .cb = snl_attr_get_uint8 },
1348 };
1349 SNL_DECLARE_ATTR_PARSER(speer_parser, nla_p_speer);
1350 #undef _OUT
1351 
1352 #define	_OUT(_field)	offsetof(struct pf_state_key_export, _field)
1353 static const struct snl_attr_parser nla_p_skey[] = {
1354 	{ .type = PF_STK_ADDR0, .off = _OUT(addr[0]), .cb = snl_attr_get_pfaddr },
1355 	{ .type = PF_STK_ADDR1, .off = _OUT(addr[1]), .cb = snl_attr_get_pfaddr },
1356 	{ .type = PF_STK_PORT0, .off = _OUT(port[0]), .cb = snl_attr_get_uint16 },
1357 	{ .type = PF_STK_PORT1, .off = _OUT(port[1]), .cb = snl_attr_get_uint16 },
1358 };
1359 SNL_DECLARE_ATTR_PARSER(skey_parser, nla_p_skey);
1360 #undef _OUT
1361 
1362 #define	_IN(_field)	offsetof(struct genlmsghdr, _field)
1363 #define	_OUT(_field)	offsetof(struct pfctl_state, _field)
1364 static struct snl_attr_parser ap_state[] = {
1365 	{ .type = PF_ST_ID, .off = _OUT(id), .cb = snl_attr_get_uint64 },
1366 	{ .type = PF_ST_CREATORID, .off = _OUT(creatorid), .cb = snl_attr_get_uint32 },
1367 	{ .type = PF_ST_IFNAME, .off = _OUT(ifname), .cb = snl_attr_store_ifname },
1368 	{ .type = PF_ST_ORIG_IFNAME, .off = _OUT(orig_ifname), .cb = snl_attr_store_ifname },
1369 	{ .type = PF_ST_KEY_WIRE, .off = _OUT(key[0]), .arg = &skey_parser, .cb = snl_attr_get_nested },
1370 	{ .type = PF_ST_KEY_STACK, .off = _OUT(key[1]), .arg = &skey_parser, .cb = snl_attr_get_nested },
1371 	{ .type = PF_ST_PEER_SRC, .off = _OUT(src), .arg = &speer_parser, .cb = snl_attr_get_nested },
1372 	{ .type = PF_ST_PEER_DST, .off = _OUT(dst), .arg = &speer_parser, .cb = snl_attr_get_nested },
1373 	{ .type = PF_ST_RT_ADDR, .off = _OUT(rt_addr), .cb = snl_attr_get_pfaddr },
1374 	{ .type = PF_ST_RULE, .off = _OUT(rule), .cb = snl_attr_get_uint32 },
1375 	{ .type = PF_ST_ANCHOR, .off = _OUT(anchor), .cb = snl_attr_get_uint32 },
1376 	{ .type = PF_ST_NAT_RULE, .off = _OUT(nat_rule), .cb = snl_attr_get_uint32 },
1377 	{ .type = PF_ST_CREATION, .off = _OUT(creation), .cb = snl_attr_get_uint32 },
1378 	{ .type = PF_ST_EXPIRE, .off = _OUT(expire), .cb = snl_attr_get_uint32 },
1379 	{ .type = PF_ST_PACKETS0, .off = _OUT(packets[0]), .cb = snl_attr_get_uint64 },
1380 	{ .type = PF_ST_PACKETS1, .off = _OUT(packets[1]), .cb = snl_attr_get_uint64 },
1381 	{ .type = PF_ST_BYTES0, .off = _OUT(bytes[0]), .cb = snl_attr_get_uint64 },
1382 	{ .type = PF_ST_BYTES1, .off = _OUT(bytes[1]), .cb = snl_attr_get_uint64 },
1383 	{ .type = PF_ST_AF, .off = _OUT(key[0].af), .cb = snl_attr_get_uint8 },
1384 	{ .type = PF_ST_PROTO, .off = _OUT(key[0].proto), .cb = snl_attr_get_uint8 },
1385 	{ .type = PF_ST_DIRECTION, .off = _OUT(direction), .cb = snl_attr_get_uint8 },
1386 	{ .type = PF_ST_LOG, .off = _OUT(log), .cb = snl_attr_get_uint8 },
1387 	{ .type = PF_ST_STATE_FLAGS, .off = _OUT(state_flags), .cb = snl_attr_get_uint16 },
1388 	{ .type = PF_ST_SYNC_FLAGS, .off = _OUT(sync_flags), .cb = snl_attr_get_uint8 },
1389 };
1390 static struct snl_field_parser fp_state[] = {
1391 };
1392 #undef _IN
1393 #undef _OUT
1394 SNL_DECLARE_PARSER(state_parser, struct genlmsghdr, fp_state, ap_state);
1395 
1396 static const struct snl_hdr_parser *all_parsers[] = {
1397 	&state_parser, &skey_parser, &speer_parser,
1398 	&creator_parser, &getrules_parser
1399 };
1400 
1401 static int
1402 pfctl_get_states_nl(struct pfctl_state_filter *filter, struct snl_state *ss, pfctl_get_state_fn f, void *arg)
1403 {
1404 	SNL_VERIFY_PARSERS(all_parsers);
1405 	int family_id = snl_get_genl_family(ss, PFNL_FAMILY_NAME);
1406 	int ret;
1407 
1408 	struct nlmsghdr *hdr;
1409 	struct snl_writer nw;
1410 
1411 	if (family_id == 0)
1412 		return (ENOTSUP);
1413 
1414 	snl_init_writer(ss, &nw);
1415 	hdr = snl_create_genl_msg_request(&nw, family_id, PFNL_CMD_GETSTATES);
1416 	hdr->nlmsg_flags |= NLM_F_DUMP;
1417 	snl_add_msg_attr_string(&nw, PF_ST_IFNAME, filter->ifname);
1418 	snl_add_msg_attr_u16(&nw, PF_ST_PROTO, filter->proto);
1419 	snl_add_msg_attr_u8(&nw, PF_ST_AF, filter->af);
1420 	snl_add_msg_attr_ip6(&nw, PF_ST_FILTER_ADDR, &filter->addr.v6);
1421 	snl_add_msg_attr_ip6(&nw, PF_ST_FILTER_MASK, &filter->mask.v6);
1422 
1423 	hdr = snl_finalize_msg(&nw);
1424 	if (hdr == NULL)
1425 		return (ENOMEM);
1426 
1427 	uint32_t seq_id = hdr->nlmsg_seq;
1428 
1429 	snl_send_message(ss, hdr);
1430 
1431 	struct snl_errmsg_data e = {};
1432 	while ((hdr = snl_read_reply_multi(ss, seq_id, &e)) != NULL) {
1433 		struct pfctl_state s;
1434 		bzero(&s, sizeof(s));
1435 		if (!snl_parse_nlmsg(ss, hdr, &state_parser, &s))
1436 			continue;
1437 
1438 		s.key[1].af = s.key[0].af;
1439 		s.key[1].proto = s.key[0].proto;
1440 
1441 		ret = f(&s, arg);
1442 		if (ret != 0)
1443 			return (ret);
1444 	}
1445 
1446 	return (0);
1447 }
1448 
1449 int
1450 pfctl_get_states_iter(pfctl_get_state_fn f, void *arg)
1451 {
1452 	struct pfctl_state_filter filter = {};
1453 	return (pfctl_get_filtered_states_iter(&filter, f, arg));
1454 }
1455 
1456 int
1457 pfctl_get_filtered_states_iter(struct pfctl_state_filter *filter, pfctl_get_state_fn f, void *arg)
1458 {
1459 	struct snl_state ss = {};
1460 	int error;
1461 
1462 	snl_init(&ss, NETLINK_GENERIC);
1463 	error = pfctl_get_states_nl(filter, &ss, f, arg);
1464 	snl_free(&ss);
1465 
1466 	return (error);
1467 }
1468 
1469 static int
1470 pfctl_append_states(struct pfctl_state *s, void *arg)
1471 {
1472 	struct pfctl_state *new;
1473 	struct pfctl_states *states = (struct pfctl_states *)arg;
1474 
1475 	new = malloc(sizeof(*s));
1476 	if (new == NULL)
1477 		return (ENOMEM);
1478 
1479 	memcpy(new, s, sizeof(*s));
1480 
1481 	TAILQ_INSERT_TAIL(&states->states, new, entry);
1482 
1483 	return (0);
1484 }
1485 
1486 int
1487 pfctl_get_states(int dev __unused, struct pfctl_states *states)
1488 {
1489 	int ret;
1490 
1491 	bzero(states, sizeof(*states));
1492 	TAILQ_INIT(&states->states);
1493 
1494 	ret = pfctl_get_states_iter(pfctl_append_states, states);
1495 	if (ret != 0) {
1496 		pfctl_free_states(states);
1497 		return (ret);
1498 	}
1499 
1500 	return (0);
1501 }
1502 
1503 void
1504 pfctl_free_states(struct pfctl_states *states)
1505 {
1506 	struct pfctl_state *s, *tmp;
1507 
1508 	TAILQ_FOREACH_SAFE(s, &states->states, entry, tmp) {
1509 		free(s);
1510 	}
1511 
1512 	bzero(states, sizeof(*states));
1513 }
1514 
1515 static int
1516 _pfctl_clear_states(int dev, const struct pfctl_kill *kill,
1517     unsigned int *killed, uint64_t ioctlval)
1518 {
1519 	nvlist_t	*nvl;
1520 	int		 ret;
1521 
1522 	nvl = nvlist_create(0);
1523 
1524 	pfctl_nv_add_state_cmp(nvl, "cmp", &kill->cmp);
1525 	nvlist_add_number(nvl, "af", kill->af);
1526 	nvlist_add_number(nvl, "proto", kill->proto);
1527 	pfctl_nv_add_rule_addr(nvl, "src", &kill->src);
1528 	pfctl_nv_add_rule_addr(nvl, "dst", &kill->dst);
1529 	pfctl_nv_add_rule_addr(nvl, "rt_addr", &kill->rt_addr);
1530 	nvlist_add_string(nvl, "ifname", kill->ifname);
1531 	nvlist_add_string(nvl, "label", kill->label);
1532 	nvlist_add_bool(nvl, "kill_match", kill->kill_match);
1533 	nvlist_add_bool(nvl, "nat", kill->nat);
1534 
1535 	if ((ret = pfctl_do_ioctl(dev, ioctlval, 1024, &nvl)) != 0)
1536 		goto out;
1537 
1538 	if (killed)
1539 		*killed = nvlist_get_number(nvl, "killed");
1540 
1541 out:
1542 	nvlist_destroy(nvl);
1543 	return (ret);
1544 }
1545 
1546 int
1547 pfctl_clear_states(int dev, const struct pfctl_kill *kill,
1548     unsigned int *killed)
1549 {
1550 	return (_pfctl_clear_states(dev, kill, killed, DIOCCLRSTATESNV));
1551 }
1552 
1553 int
1554 pfctl_kill_states(int dev, const struct pfctl_kill *kill, unsigned int *killed)
1555 {
1556 	return (_pfctl_clear_states(dev, kill, killed, DIOCKILLSTATESNV));
1557 }
1558 
1559 int
1560 pfctl_clear_rules(int dev, const char *anchorname)
1561 {
1562 	struct pfioc_trans trans;
1563 	struct pfioc_trans_e transe[2];
1564 	int ret;
1565 
1566 	bzero(&trans, sizeof(trans));
1567 	bzero(&transe, sizeof(transe));
1568 
1569 	transe[0].rs_num = PF_RULESET_SCRUB;
1570 	if (strlcpy(transe[0].anchor, anchorname, sizeof(transe[0].anchor))
1571 	    >= sizeof(transe[0].anchor))
1572 		return (E2BIG);
1573 
1574 	transe[1].rs_num = PF_RULESET_FILTER;
1575 	if (strlcpy(transe[1].anchor, anchorname, sizeof(transe[1].anchor))
1576 	    >= sizeof(transe[1].anchor))
1577 		return (E2BIG);
1578 
1579 	trans.size = 2;
1580 	trans.esize = sizeof(transe[0]);
1581 	trans.array = transe;
1582 
1583 	ret = ioctl(dev, DIOCXBEGIN, &trans);
1584 	if (ret != 0)
1585 		return (ret);
1586 	return ioctl(dev, DIOCXCOMMIT, &trans);
1587 }
1588 
1589 int
1590 pfctl_clear_nat(int dev, const char *anchorname)
1591 {
1592 	struct pfioc_trans trans;
1593 	struct pfioc_trans_e transe[3];
1594 	int ret;
1595 
1596 	bzero(&trans, sizeof(trans));
1597 	bzero(&transe, sizeof(transe));
1598 
1599 	transe[0].rs_num = PF_RULESET_NAT;
1600 	if (strlcpy(transe[0].anchor, anchorname, sizeof(transe[0].anchor))
1601 	    >= sizeof(transe[0].anchor))
1602 		return (E2BIG);
1603 
1604 	transe[1].rs_num = PF_RULESET_BINAT;
1605 	if (strlcpy(transe[1].anchor, anchorname, sizeof(transe[1].anchor))
1606 	    >= sizeof(transe[0].anchor))
1607 		return (E2BIG);
1608 
1609 	transe[2].rs_num = PF_RULESET_RDR;
1610 	if (strlcpy(transe[2].anchor, anchorname, sizeof(transe[2].anchor))
1611 	    >= sizeof(transe[2].anchor))
1612 		return (E2BIG);
1613 
1614 	trans.size = 3;
1615 	trans.esize = sizeof(transe[0]);
1616 	trans.array = transe;
1617 
1618 	ret = ioctl(dev, DIOCXBEGIN, &trans);
1619 	if (ret != 0)
1620 		return (ret);
1621 	return ioctl(dev, DIOCXCOMMIT, &trans);
1622 }
1623 int
1624 pfctl_clear_eth_rules(int dev, const char *anchorname)
1625 {
1626 	struct pfioc_trans trans;
1627 	struct pfioc_trans_e transe;
1628 	int ret;
1629 
1630 	bzero(&trans, sizeof(trans));
1631 	bzero(&transe, sizeof(transe));
1632 
1633 	transe.rs_num = PF_RULESET_ETH;
1634 	if (strlcpy(transe.anchor, anchorname, sizeof(transe.anchor))
1635 	    >= sizeof(transe.anchor))
1636 		return (E2BIG);
1637 
1638 	trans.size = 1;
1639 	trans.esize = sizeof(transe);
1640 	trans.array = &transe;
1641 
1642 	ret = ioctl(dev, DIOCXBEGIN, &trans);
1643 	if (ret != 0)
1644 		return (ret);
1645 	return ioctl(dev, DIOCXCOMMIT, &trans);
1646 }
1647 
1648 static int
1649 pfctl_get_limit(int dev, const int index, uint *limit)
1650 {
1651 	struct pfioc_limit pl;
1652 
1653 	bzero(&pl, sizeof(pl));
1654 	pl.index = index;
1655 
1656 	if (ioctl(dev, DIOCGETLIMIT, &pl) == -1)
1657 		return (errno);
1658 
1659 	*limit = pl.limit;
1660 
1661 	return (0);
1662 }
1663 
1664 int
1665 pfctl_set_syncookies(int dev, const struct pfctl_syncookies *s)
1666 {
1667 	struct pfioc_nv	 nv;
1668 	nvlist_t	*nvl;
1669 	int		 ret;
1670 	uint		 state_limit;
1671 	uint64_t	 lim, hi, lo;
1672 
1673 	ret = pfctl_get_limit(dev, PF_LIMIT_STATES, &state_limit);
1674 	if (ret != 0)
1675 		return (ret);
1676 
1677 	lim = state_limit;
1678 	hi = lim * s->highwater / 100;
1679 	lo = lim * s->lowwater / 100;
1680 
1681 	if (lo == hi)
1682 		hi++;
1683 
1684 	nvl = nvlist_create(0);
1685 
1686 	nvlist_add_bool(nvl, "enabled", s->mode != PFCTL_SYNCOOKIES_NEVER);
1687 	nvlist_add_bool(nvl, "adaptive", s->mode == PFCTL_SYNCOOKIES_ADAPTIVE);
1688 	nvlist_add_number(nvl, "highwater", hi);
1689 	nvlist_add_number(nvl, "lowwater", lo);
1690 
1691 	nv.data = nvlist_pack(nvl, &nv.len);
1692 	nv.size = nv.len;
1693 	nvlist_destroy(nvl);
1694 	nvl = NULL;
1695 
1696 	ret = ioctl(dev, DIOCSETSYNCOOKIES, &nv);
1697 
1698 	free(nv.data);
1699 	return (ret);
1700 }
1701 
1702 int
1703 pfctl_get_syncookies(int dev, struct pfctl_syncookies *s)
1704 {
1705 	nvlist_t	*nvl;
1706 	int		 ret;
1707 	uint		 state_limit;
1708 	bool		 enabled, adaptive;
1709 
1710 	ret = pfctl_get_limit(dev, PF_LIMIT_STATES, &state_limit);
1711 	if (ret != 0)
1712 		return (ret);
1713 
1714 	bzero(s, sizeof(*s));
1715 
1716 	nvl = nvlist_create(0);
1717 
1718 	if ((ret = pfctl_do_ioctl(dev, DIOCGETSYNCOOKIES, 256, &nvl)) != 0) {
1719 		ret = errno;
1720 		goto out;
1721 	}
1722 
1723 	enabled = nvlist_get_bool(nvl, "enabled");
1724 	adaptive = nvlist_get_bool(nvl, "adaptive");
1725 
1726 	if (enabled) {
1727 		if (adaptive)
1728 			s->mode = PFCTL_SYNCOOKIES_ADAPTIVE;
1729 		else
1730 			s->mode = PFCTL_SYNCOOKIES_ALWAYS;
1731 	} else {
1732 		s->mode = PFCTL_SYNCOOKIES_NEVER;
1733 	}
1734 
1735 	s->highwater = nvlist_get_number(nvl, "highwater") * 100 / state_limit;
1736 	s->lowwater = nvlist_get_number(nvl, "lowwater") * 100 / state_limit;
1737 	s->halfopen_states = nvlist_get_number(nvl, "halfopen_states");
1738 
1739 out:
1740 	nvlist_destroy(nvl);
1741 	return (ret);
1742 }
1743 
1744 int
1745 pfctl_table_add_addrs(int dev, struct pfr_table *tbl, struct pfr_addr
1746     *addr, int size, int *nadd, int flags)
1747 {
1748 	struct pfioc_table io;
1749 
1750 	if (tbl == NULL || size < 0 || (size && addr == NULL)) {
1751 		return (EINVAL);
1752 	}
1753 	bzero(&io, sizeof io);
1754 	io.pfrio_flags = flags;
1755 	io.pfrio_table = *tbl;
1756 	io.pfrio_buffer = addr;
1757 	io.pfrio_esize = sizeof(*addr);
1758 	io.pfrio_size = size;
1759 
1760 	if (ioctl(dev, DIOCRADDADDRS, &io))
1761 		return (errno);
1762 	if (nadd != NULL)
1763 		*nadd = io.pfrio_nadd;
1764 	return (0);
1765 }
1766 
1767 int
1768 pfctl_table_del_addrs(int dev, struct pfr_table *tbl, struct pfr_addr
1769     *addr, int size, int *ndel, int flags)
1770 {
1771 	struct pfioc_table io;
1772 
1773 	if (tbl == NULL || size < 0 || (size && addr == NULL)) {
1774 		return (EINVAL);
1775 	}
1776 	bzero(&io, sizeof io);
1777 	io.pfrio_flags = flags;
1778 	io.pfrio_table = *tbl;
1779 	io.pfrio_buffer = addr;
1780 	io.pfrio_esize = sizeof(*addr);
1781 	io.pfrio_size = size;
1782 
1783 	if (ioctl(dev, DIOCRDELADDRS, &io))
1784 		return (errno);
1785 	if (ndel != NULL)
1786 		*ndel = io.pfrio_ndel;
1787 	return (0);
1788 }
1789 
1790 int
1791 pfctl_table_set_addrs(int dev, struct pfr_table *tbl, struct pfr_addr
1792     *addr, int size, int *size2, int *nadd, int *ndel, int *nchange, int flags)
1793 {
1794 	struct pfioc_table io;
1795 
1796 	if (tbl == NULL || size < 0 || (size && addr == NULL)) {
1797 		return (EINVAL);
1798 	}
1799 	bzero(&io, sizeof io);
1800 	io.pfrio_flags = flags;
1801 	io.pfrio_table = *tbl;
1802 	io.pfrio_buffer = addr;
1803 	io.pfrio_esize = sizeof(*addr);
1804 	io.pfrio_size = size;
1805 	io.pfrio_size2 = (size2 != NULL) ? *size2 : 0;
1806 	if (ioctl(dev, DIOCRSETADDRS, &io))
1807 		return (-1);
1808 	if (nadd != NULL)
1809 		*nadd = io.pfrio_nadd;
1810 	if (ndel != NULL)
1811 		*ndel = io.pfrio_ndel;
1812 	if (nchange != NULL)
1813 		*nchange = io.pfrio_nchange;
1814 	if (size2 != NULL)
1815 		*size2 = io.pfrio_size2;
1816 	return (0);
1817 }
1818 
1819 int pfctl_table_get_addrs(int dev, struct pfr_table *tbl, struct pfr_addr *addr,
1820     int *size, int flags)
1821 {
1822 	struct pfioc_table io;
1823 
1824 	if (tbl == NULL || size == NULL || *size < 0 ||
1825 	    (*size && addr == NULL)) {
1826 		return (EINVAL);
1827 	}
1828 	bzero(&io, sizeof io);
1829 	io.pfrio_flags = flags;
1830 	io.pfrio_table = *tbl;
1831 	io.pfrio_buffer = addr;
1832 	io.pfrio_esize = sizeof(*addr);
1833 	io.pfrio_size = *size;
1834 	if (ioctl(dev, DIOCRGETADDRS, &io))
1835 		return (-1);
1836 	*size = io.pfrio_size;
1837 	return (0);
1838 }
1839