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 * $FreeBSD$ 32 */ 33 34 #include <sys/cdefs.h> 35 36 #include <sys/ioctl.h> 37 #include <sys/nv.h> 38 #include <sys/queue.h> 39 #include <sys/types.h> 40 41 #include <net/if.h> 42 #include <net/pfvar.h> 43 #include <netinet/in.h> 44 45 #include <assert.h> 46 #include <err.h> 47 #include <errno.h> 48 #include <stdlib.h> 49 #include <string.h> 50 51 #include "libpfctl.h" 52 53 static void 54 pf_nvuint_8_array(const nvlist_t *nvl, const char *name, size_t maxelems, 55 u_int8_t *numbers, size_t *nelems) 56 { 57 const uint64_t *tmp; 58 size_t elems; 59 60 tmp = nvlist_get_number_array(nvl, name, &elems); 61 assert(elems <= maxelems); 62 63 for (size_t i = 0; i < elems; i++) 64 numbers[i] = tmp[i]; 65 66 if (nelems) 67 *nelems = elems; 68 } 69 70 static void 71 pf_nvuint_16_array(const nvlist_t *nvl, const char *name, size_t maxelems, 72 u_int16_t *numbers, size_t *nelems) 73 { 74 const uint64_t *tmp; 75 size_t elems; 76 77 tmp = nvlist_get_number_array(nvl, name, &elems); 78 assert(elems <= maxelems); 79 80 for (size_t i = 0; i < elems; i++) 81 numbers[i] = tmp[i]; 82 83 if (nelems) 84 *nelems = elems; 85 } 86 87 static void 88 pf_nvuint_32_array(const nvlist_t *nvl, const char *name, size_t maxelems, 89 u_int32_t *numbers, size_t *nelems) 90 { 91 const uint64_t *tmp; 92 size_t elems; 93 94 tmp = nvlist_get_number_array(nvl, name, &elems); 95 assert(elems <= maxelems); 96 97 for (size_t i = 0; i < elems; i++) 98 numbers[i] = tmp[i]; 99 100 if (nelems) 101 *nelems = elems; 102 } 103 104 static void 105 pf_nvuint_64_array(const nvlist_t *nvl, const char *name, size_t maxelems, 106 u_int64_t *numbers, size_t *nelems) 107 { 108 const uint64_t *tmp; 109 size_t elems; 110 111 tmp = nvlist_get_number_array(nvl, name, &elems); 112 assert(elems <= maxelems); 113 114 for (size_t i = 0; i < elems; i++) 115 numbers[i] = tmp[i]; 116 117 if (nelems) 118 *nelems = elems; 119 } 120 121 static void 122 pfctl_nv_add_addr(nvlist_t *nvparent, const char *name, 123 const struct pf_addr *addr) 124 { 125 nvlist_t *nvl = nvlist_create(0); 126 127 nvlist_add_binary(nvl, "addr", addr, sizeof(*addr)); 128 129 nvlist_add_nvlist(nvparent, name, nvl); 130 } 131 132 static void 133 pf_nvaddr_to_addr(const nvlist_t *nvl, struct pf_addr *addr) 134 { 135 size_t len; 136 const void *data; 137 138 data = nvlist_get_binary(nvl, "addr", &len); 139 assert(len == sizeof(struct pf_addr)); 140 memcpy(addr, data, len); 141 } 142 143 static void 144 pfctl_nv_add_addr_wrap(nvlist_t *nvparent, const char *name, 145 const struct pf_addr_wrap *addr) 146 { 147 nvlist_t *nvl = nvlist_create(0); 148 149 nvlist_add_number(nvl, "type", addr->type); 150 nvlist_add_number(nvl, "iflags", addr->iflags); 151 if (addr->type == PF_ADDR_DYNIFTL) 152 nvlist_add_string(nvl, "ifname", addr->v.ifname); 153 if (addr->type == PF_ADDR_TABLE) 154 nvlist_add_string(nvl, "tblname", addr->v.tblname); 155 pfctl_nv_add_addr(nvl, "addr", &addr->v.a.addr); 156 pfctl_nv_add_addr(nvl, "mask", &addr->v.a.mask); 157 158 nvlist_add_nvlist(nvparent, name, nvl); 159 } 160 161 static void 162 pf_nvaddr_wrap_to_addr_wrap(const nvlist_t *nvl, struct pf_addr_wrap *addr) 163 { 164 addr->type = nvlist_get_number(nvl, "type"); 165 addr->iflags = nvlist_get_number(nvl, "iflags"); 166 if (addr->type == PF_ADDR_DYNIFTL) 167 strlcpy(addr->v.ifname, nvlist_get_string(nvl, "ifname"), 168 IFNAMSIZ); 169 if (addr->type == PF_ADDR_TABLE) 170 strlcpy(addr->v.tblname, nvlist_get_string(nvl, "tblname"), 171 PF_TABLE_NAME_SIZE); 172 173 pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "addr"), &addr->v.a.addr); 174 pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "mask"), &addr->v.a.mask); 175 } 176 177 static void 178 pfctl_nv_add_rule_addr(nvlist_t *nvparent, const char *name, 179 const struct pf_rule_addr *addr) 180 { 181 u_int64_t ports[2]; 182 nvlist_t *nvl = nvlist_create(0); 183 184 pfctl_nv_add_addr_wrap(nvl, "addr", &addr->addr); 185 ports[0] = addr->port[0]; 186 ports[1] = addr->port[1]; 187 nvlist_add_number_array(nvl, "port", ports, 2); 188 nvlist_add_number(nvl, "neg", addr->neg); 189 nvlist_add_number(nvl, "port_op", addr->port_op); 190 191 nvlist_add_nvlist(nvparent, name, nvl); 192 } 193 194 static void 195 pf_nvrule_addr_to_rule_addr(const nvlist_t *nvl, struct pf_rule_addr *addr) 196 { 197 pf_nvaddr_wrap_to_addr_wrap(nvlist_get_nvlist(nvl, "addr"), &addr->addr); 198 199 pf_nvuint_16_array(nvl, "port", 2, addr->port, NULL); 200 addr->neg = nvlist_get_number(nvl, "neg"); 201 addr->port_op = nvlist_get_number(nvl, "port_op"); 202 } 203 204 static void 205 pfctl_nv_add_pool(nvlist_t *nvparent, const char *name, 206 const struct pfctl_pool *pool) 207 { 208 u_int64_t ports[2]; 209 nvlist_t *nvl = nvlist_create(0); 210 211 nvlist_add_binary(nvl, "key", &pool->key, sizeof(pool->key)); 212 pfctl_nv_add_addr(nvl, "counter", &pool->counter); 213 nvlist_add_number(nvl, "tblidx", pool->tblidx); 214 215 ports[0] = pool->proxy_port[0]; 216 ports[1] = pool->proxy_port[1]; 217 nvlist_add_number_array(nvl, "proxy_port", ports, 2); 218 nvlist_add_number(nvl, "opts", pool->opts); 219 220 nvlist_add_nvlist(nvparent, name, nvl); 221 } 222 223 static void 224 pf_nvpool_to_pool(const nvlist_t *nvl, struct pfctl_pool *pool) 225 { 226 size_t len; 227 const void *data; 228 229 data = nvlist_get_binary(nvl, "key", &len); 230 assert(len == sizeof(pool->key)); 231 memcpy(&pool->key, data, len); 232 233 pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "counter"), &pool->counter); 234 235 pool->tblidx = nvlist_get_number(nvl, "tblidx"); 236 pf_nvuint_16_array(nvl, "proxy_port", 2, pool->proxy_port, NULL); 237 pool->opts = nvlist_get_number(nvl, "opts"); 238 } 239 240 static void 241 pfctl_nv_add_uid(nvlist_t *nvparent, const char *name, 242 const struct pf_rule_uid *uid) 243 { 244 u_int64_t uids[2]; 245 nvlist_t *nvl = nvlist_create(0); 246 247 uids[0] = uid->uid[0]; 248 uids[1] = uid->uid[1]; 249 nvlist_add_number_array(nvl, "uid", uids, 2); 250 nvlist_add_number(nvl, "op", uid->op); 251 252 nvlist_add_nvlist(nvparent, name, nvl); 253 } 254 255 static void 256 pf_nvrule_uid_to_rule_uid(const nvlist_t *nvl, struct pf_rule_uid *uid) 257 { 258 pf_nvuint_32_array(nvl, "uid", 2, uid->uid, NULL); 259 uid->op = nvlist_get_number(nvl, "op"); 260 } 261 262 static void 263 pfctl_nv_add_divert(nvlist_t *nvparent, const char *name, 264 const struct pfctl_rule *r) 265 { 266 nvlist_t *nvl = nvlist_create(0); 267 268 pfctl_nv_add_addr(nvl, "addr", &r->divert.addr); 269 nvlist_add_number(nvl, "port", r->divert.port); 270 271 nvlist_add_nvlist(nvparent, name, nvl); 272 } 273 274 static void 275 pf_nvdivert_to_divert(const nvlist_t *nvl, struct pfctl_rule *rule) 276 { 277 pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "addr"), &rule->divert.addr); 278 rule->divert.port = nvlist_get_number(nvl, "port"); 279 } 280 281 static void 282 pf_nvrule_to_rule(const nvlist_t *nvl, struct pfctl_rule *rule) 283 { 284 const uint64_t *skip; 285 const char *const *labels; 286 size_t skipcount, labelcount; 287 288 rule->nr = nvlist_get_number(nvl, "nr"); 289 290 pf_nvrule_addr_to_rule_addr(nvlist_get_nvlist(nvl, "src"), &rule->src); 291 pf_nvrule_addr_to_rule_addr(nvlist_get_nvlist(nvl, "dst"), &rule->dst); 292 293 skip = nvlist_get_number_array(nvl, "skip", &skipcount); 294 assert(skip); 295 assert(skipcount == PF_SKIP_COUNT); 296 for (int i = 0; i < PF_SKIP_COUNT; i++) 297 rule->skip[i].nr = skip[i]; 298 299 labels = nvlist_get_string_array(nvl, "labels", &labelcount); 300 assert(labelcount <= PF_RULE_MAX_LABEL_COUNT); 301 for (size_t i = 0; i < labelcount; i++) 302 strlcpy(rule->label[i], labels[i], PF_RULE_LABEL_SIZE); 303 strlcpy(rule->ifname, nvlist_get_string(nvl, "ifname"), IFNAMSIZ); 304 strlcpy(rule->qname, nvlist_get_string(nvl, "qname"), PF_QNAME_SIZE); 305 strlcpy(rule->pqname, nvlist_get_string(nvl, "pqname"), PF_QNAME_SIZE); 306 strlcpy(rule->tagname, nvlist_get_string(nvl, "tagname"), 307 PF_TAG_NAME_SIZE); 308 strlcpy(rule->match_tagname, nvlist_get_string(nvl, "match_tagname"), 309 PF_TAG_NAME_SIZE); 310 311 strlcpy(rule->overload_tblname, nvlist_get_string(nvl, "overload_tblname"), 312 PF_TABLE_NAME_SIZE); 313 314 pf_nvpool_to_pool(nvlist_get_nvlist(nvl, "rpool"), &rule->rpool); 315 316 rule->evaluations = nvlist_get_number(nvl, "evaluations"); 317 pf_nvuint_64_array(nvl, "packets", 2, rule->packets, NULL); 318 pf_nvuint_64_array(nvl, "bytes", 2, rule->bytes, NULL); 319 320 rule->os_fingerprint = nvlist_get_number(nvl, "os_fingerprint"); 321 322 rule->rtableid = nvlist_get_number(nvl, "rtableid"); 323 pf_nvuint_32_array(nvl, "timeout", PFTM_MAX, rule->timeout, NULL); 324 rule->max_states = nvlist_get_number(nvl, "max_states"); 325 rule->max_src_nodes = nvlist_get_number(nvl, "max_src_nodes"); 326 rule->max_src_states = nvlist_get_number(nvl, "max_src_states"); 327 rule->max_src_conn = nvlist_get_number(nvl, "max_src_conn"); 328 rule->max_src_conn_rate.limit = 329 nvlist_get_number(nvl, "max_src_conn_rate.limit"); 330 rule->max_src_conn_rate.seconds = 331 nvlist_get_number(nvl, "max_src_conn_rate.seconds"); 332 rule->qid = nvlist_get_number(nvl, "qid"); 333 rule->pqid = nvlist_get_number(nvl, "pqid"); 334 rule->prob = nvlist_get_number(nvl, "prob"); 335 rule->cuid = nvlist_get_number(nvl, "cuid"); 336 rule->cpid = nvlist_get_number(nvl, "cpid"); 337 338 rule->return_icmp = nvlist_get_number(nvl, "return_icmp"); 339 rule->return_icmp6 = nvlist_get_number(nvl, "return_icmp6"); 340 rule->max_mss = nvlist_get_number(nvl, "max_mss"); 341 rule->scrub_flags = nvlist_get_number(nvl, "scrub_flags"); 342 343 pf_nvrule_uid_to_rule_uid(nvlist_get_nvlist(nvl, "uid"), &rule->uid); 344 pf_nvrule_uid_to_rule_uid(nvlist_get_nvlist(nvl, "gid"), 345 (struct pf_rule_uid *)&rule->gid); 346 347 rule->rule_flag = nvlist_get_number(nvl, "rule_flag"); 348 rule->action = nvlist_get_number(nvl, "action"); 349 rule->direction = nvlist_get_number(nvl, "direction"); 350 rule->log = nvlist_get_number(nvl, "log"); 351 rule->logif = nvlist_get_number(nvl, "logif"); 352 rule->quick = nvlist_get_number(nvl, "quick"); 353 rule->ifnot = nvlist_get_number(nvl, "ifnot"); 354 rule->match_tag_not = nvlist_get_number(nvl, "match_tag_not"); 355 rule->natpass = nvlist_get_number(nvl, "natpass"); 356 357 rule->keep_state = nvlist_get_number(nvl, "keep_state"); 358 rule->af = nvlist_get_number(nvl, "af"); 359 rule->proto = nvlist_get_number(nvl, "proto"); 360 rule->type = nvlist_get_number(nvl, "type"); 361 rule->code = nvlist_get_number(nvl, "code"); 362 rule->flags = nvlist_get_number(nvl, "flags"); 363 rule->flagset = nvlist_get_number(nvl, "flagset"); 364 rule->min_ttl = nvlist_get_number(nvl, "min_ttl"); 365 rule->allow_opts = nvlist_get_number(nvl, "allow_opts"); 366 rule->rt = nvlist_get_number(nvl, "rt"); 367 rule->return_ttl = nvlist_get_number(nvl, "return_ttl"); 368 rule->tos = nvlist_get_number(nvl, "tos"); 369 rule->set_tos = nvlist_get_number(nvl, "set_tos"); 370 rule->anchor_relative = nvlist_get_number(nvl, "anchor_relative"); 371 rule->anchor_wildcard = nvlist_get_number(nvl, "anchor_wildcard"); 372 373 rule->flush = nvlist_get_number(nvl, "flush"); 374 rule->prio = nvlist_get_number(nvl, "prio"); 375 pf_nvuint_8_array(nvl, "set_prio", 2, rule->set_prio, NULL); 376 377 pf_nvdivert_to_divert(nvlist_get_nvlist(nvl, "divert"), rule); 378 379 rule->states_cur = nvlist_get_number(nvl, "states_cur"); 380 rule->states_tot = nvlist_get_number(nvl, "states_tot"); 381 rule->src_nodes = nvlist_get_number(nvl, "src_nodes"); 382 } 383 384 int 385 pfctl_add_rule(int dev, const struct pfctl_rule *r, const char *anchor, 386 const char *anchor_call, u_int32_t ticket, u_int32_t pool_ticket) 387 { 388 struct pfioc_nv nv; 389 u_int64_t timeouts[PFTM_MAX]; 390 u_int64_t set_prio[2]; 391 nvlist_t *nvl, *nvlr; 392 size_t labelcount; 393 int ret; 394 395 nvl = nvlist_create(0); 396 nvlr = nvlist_create(0); 397 398 nvlist_add_number(nvl, "ticket", ticket); 399 nvlist_add_number(nvl, "pool_ticket", pool_ticket); 400 nvlist_add_string(nvl, "anchor", anchor); 401 nvlist_add_string(nvl, "anchor_call", anchor_call); 402 403 nvlist_add_number(nvlr, "nr", r->nr); 404 pfctl_nv_add_rule_addr(nvlr, "src", &r->src); 405 pfctl_nv_add_rule_addr(nvlr, "dst", &r->dst); 406 407 labelcount = 0; 408 while (r->label[labelcount][0] != 0 && 409 labelcount < PF_RULE_MAX_LABEL_COUNT) { 410 nvlist_append_string_array(nvlr, "labels", 411 r->label[labelcount]); 412 labelcount++; 413 } 414 415 nvlist_add_string(nvlr, "ifname", r->ifname); 416 nvlist_add_string(nvlr, "qname", r->qname); 417 nvlist_add_string(nvlr, "pqname", r->pqname); 418 nvlist_add_string(nvlr, "tagname", r->tagname); 419 nvlist_add_string(nvlr, "match_tagname", r->match_tagname); 420 nvlist_add_string(nvlr, "overload_tblname", r->overload_tblname); 421 422 pfctl_nv_add_pool(nvlr, "rpool", &r->rpool); 423 424 nvlist_add_number(nvlr, "os_fingerprint", r->os_fingerprint); 425 426 nvlist_add_number(nvlr, "rtableid", r->rtableid); 427 for (int i = 0; i < PFTM_MAX; i++) 428 timeouts[i] = r->timeout[i]; 429 nvlist_add_number_array(nvlr, "timeout", timeouts, PFTM_MAX); 430 nvlist_add_number(nvlr, "max_states", r->max_states); 431 nvlist_add_number(nvlr, "max_src_nodes", r->max_src_nodes); 432 nvlist_add_number(nvlr, "max_src_states", r->max_src_states); 433 nvlist_add_number(nvlr, "max_src_conn", r->max_src_conn); 434 nvlist_add_number(nvlr, "max_src_conn_rate.limit", 435 r->max_src_conn_rate.limit); 436 nvlist_add_number(nvlr, "max_src_conn_rate.seconds", 437 r->max_src_conn_rate.seconds); 438 nvlist_add_number(nvlr, "prob", r->prob); 439 nvlist_add_number(nvlr, "cuid", r->cuid); 440 nvlist_add_number(nvlr, "cpid", r->cpid); 441 442 nvlist_add_number(nvlr, "return_icmp", r->return_icmp); 443 nvlist_add_number(nvlr, "return_icmp6", r->return_icmp6); 444 445 nvlist_add_number(nvlr, "max_mss", r->max_mss); 446 nvlist_add_number(nvlr, "scrub_flags", r->scrub_flags); 447 448 pfctl_nv_add_uid(nvlr, "uid", &r->uid); 449 pfctl_nv_add_uid(nvlr, "gid", (const struct pf_rule_uid *)&r->gid); 450 451 nvlist_add_number(nvlr, "rule_flag", r->rule_flag); 452 nvlist_add_number(nvlr, "action", r->action); 453 nvlist_add_number(nvlr, "direction", r->direction); 454 nvlist_add_number(nvlr, "log", r->log); 455 nvlist_add_number(nvlr, "logif", r->logif); 456 nvlist_add_number(nvlr, "quick", r->quick); 457 nvlist_add_number(nvlr, "ifnot", r->ifnot); 458 nvlist_add_number(nvlr, "match_tag_not", r->match_tag_not); 459 nvlist_add_number(nvlr, "natpass", r->natpass); 460 461 nvlist_add_number(nvlr, "keep_state", r->keep_state); 462 nvlist_add_number(nvlr, "af", r->af); 463 nvlist_add_number(nvlr, "proto", r->proto); 464 nvlist_add_number(nvlr, "type", r->type); 465 nvlist_add_number(nvlr, "code", r->code); 466 nvlist_add_number(nvlr, "flags", r->flags); 467 nvlist_add_number(nvlr, "flagset", r->flagset); 468 nvlist_add_number(nvlr, "min_ttl", r->min_ttl); 469 nvlist_add_number(nvlr, "allow_opts", r->allow_opts); 470 nvlist_add_number(nvlr, "rt", r->rt); 471 nvlist_add_number(nvlr, "return_ttl", r->return_ttl); 472 nvlist_add_number(nvlr, "tos", r->tos); 473 nvlist_add_number(nvlr, "set_tos", r->set_tos); 474 nvlist_add_number(nvlr, "anchor_relative", r->anchor_relative); 475 nvlist_add_number(nvlr, "anchor_wildcard", r->anchor_wildcard); 476 477 nvlist_add_number(nvlr, "flush", r->flush); 478 479 nvlist_add_number(nvlr, "prio", r->prio); 480 set_prio[0] = r->set_prio[0]; 481 set_prio[1] = r->set_prio[1]; 482 nvlist_add_number_array(nvlr, "set_prio", set_prio, 2); 483 484 pfctl_nv_add_divert(nvlr, "divert", r); 485 486 nvlist_add_nvlist(nvl, "rule", nvlr); 487 488 /* Now do the call. */ 489 nv.data = nvlist_pack(nvl, &nv.len); 490 nv.size = nv.len; 491 492 ret = ioctl(dev, DIOCADDRULENV, &nv); 493 494 free(nv.data); 495 nvlist_destroy(nvl); 496 497 return (ret); 498 } 499 500 int 501 pfctl_get_rule(int dev, u_int32_t nr, u_int32_t ticket, const char *anchor, 502 u_int32_t ruleset, struct pfctl_rule *rule, char *anchor_call) 503 { 504 return (pfctl_get_clear_rule(dev, nr, ticket, anchor, ruleset, rule, 505 anchor_call, false)); 506 } 507 508 int pfctl_get_clear_rule(int dev, u_int32_t nr, u_int32_t ticket, 509 const char *anchor, u_int32_t ruleset, struct pfctl_rule *rule, 510 char *anchor_call, bool clear) 511 { 512 struct pfioc_nv nv; 513 nvlist_t *nvl; 514 void *nvlpacked; 515 int ret; 516 517 nvl = nvlist_create(0); 518 if (nvl == 0) 519 return (ENOMEM); 520 521 nvlist_add_number(nvl, "nr", nr); 522 nvlist_add_number(nvl, "ticket", ticket); 523 nvlist_add_string(nvl, "anchor", anchor); 524 nvlist_add_number(nvl, "ruleset", ruleset); 525 526 if (clear) 527 nvlist_add_bool(nvl, "clear_counter", true); 528 529 nvlpacked = nvlist_pack(nvl, &nv.len); 530 if (nvlpacked == NULL) { 531 nvlist_destroy(nvl); 532 return (ENOMEM); 533 } 534 nv.data = malloc(8182); 535 nv.size = 8192; 536 assert(nv.len <= nv.size); 537 memcpy(nv.data, nvlpacked, nv.len); 538 nvlist_destroy(nvl); 539 nvl = NULL; 540 free(nvlpacked); 541 542 ret = ioctl(dev, DIOCGETRULENV, &nv); 543 if (ret != 0) { 544 free(nv.data); 545 return (ret); 546 } 547 548 nvl = nvlist_unpack(nv.data, nv.len, 0); 549 if (nvl == NULL) { 550 free(nv.data); 551 return (EIO); 552 } 553 554 pf_nvrule_to_rule(nvlist_get_nvlist(nvl, "rule"), rule); 555 556 if (anchor_call) 557 strlcpy(anchor_call, nvlist_get_string(nvl, "anchor_call"), 558 MAXPATHLEN); 559 560 free(nv.data); 561 nvlist_destroy(nvl); 562 563 return (0); 564 } 565