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 const char* PFCTL_SYNCOOKIES_MODE_NAMES[] = { 54 "never", 55 "always", 56 "adaptive" 57 }; 58 59 static int _pfctl_clear_states(int , const struct pfctl_kill *, 60 unsigned int *, uint64_t); 61 62 static void 63 pf_nvuint_8_array(const nvlist_t *nvl, const char *name, size_t maxelems, 64 u_int8_t *numbers, size_t *nelems) 65 { 66 const uint64_t *tmp; 67 size_t elems; 68 69 tmp = nvlist_get_number_array(nvl, name, &elems); 70 assert(elems <= maxelems); 71 72 for (size_t i = 0; i < elems; i++) 73 numbers[i] = tmp[i]; 74 75 if (nelems) 76 *nelems = elems; 77 } 78 79 static void 80 pf_nvuint_16_array(const nvlist_t *nvl, const char *name, size_t maxelems, 81 u_int16_t *numbers, size_t *nelems) 82 { 83 const uint64_t *tmp; 84 size_t elems; 85 86 tmp = nvlist_get_number_array(nvl, name, &elems); 87 assert(elems <= maxelems); 88 89 for (size_t i = 0; i < elems; i++) 90 numbers[i] = tmp[i]; 91 92 if (nelems) 93 *nelems = elems; 94 } 95 96 static void 97 pf_nvuint_32_array(const nvlist_t *nvl, const char *name, size_t maxelems, 98 u_int32_t *numbers, size_t *nelems) 99 { 100 const uint64_t *tmp; 101 size_t elems; 102 103 tmp = nvlist_get_number_array(nvl, name, &elems); 104 assert(elems <= maxelems); 105 106 for (size_t i = 0; i < elems; i++) 107 numbers[i] = tmp[i]; 108 109 if (nelems) 110 *nelems = elems; 111 } 112 113 static void 114 pf_nvuint_64_array(const nvlist_t *nvl, const char *name, size_t maxelems, 115 u_int64_t *numbers, size_t *nelems) 116 { 117 const uint64_t *tmp; 118 size_t elems; 119 120 tmp = nvlist_get_number_array(nvl, name, &elems); 121 assert(elems <= maxelems); 122 123 for (size_t i = 0; i < elems; i++) 124 numbers[i] = tmp[i]; 125 126 if (nelems) 127 *nelems = elems; 128 } 129 130 static void 131 _pfctl_get_status_counters(const nvlist_t *nvl, 132 struct pfctl_status_counters *counters) 133 { 134 const uint64_t *ids, *counts; 135 const char *const *names; 136 size_t id_len, counter_len, names_len; 137 138 ids = nvlist_get_number_array(nvl, "ids", &id_len); 139 counts = nvlist_get_number_array(nvl, "counters", &counter_len); 140 names = nvlist_get_string_array(nvl, "names", &names_len); 141 assert(id_len == counter_len); 142 assert(counter_len == names_len); 143 144 TAILQ_INIT(counters); 145 146 for (size_t i = 0; i < id_len; i++) { 147 struct pfctl_status_counter *c; 148 149 c = malloc(sizeof(*c)); 150 151 c->id = ids[i]; 152 c->counter = counts[i]; 153 c->name = strdup(names[i]); 154 155 TAILQ_INSERT_TAIL(counters, c, entry); 156 } 157 } 158 159 struct pfctl_status * 160 pfctl_get_status(int dev) 161 { 162 struct pfioc_nv nv; 163 struct pfctl_status *status; 164 nvlist_t *nvl; 165 size_t len; 166 const void *chksum; 167 168 status = calloc(1, sizeof(*status)); 169 if (status == NULL) 170 return (NULL); 171 172 nv.data = malloc(4096); 173 nv.len = nv.size = 4096; 174 175 if (ioctl(dev, DIOCGETSTATUSNV, &nv)) { 176 free(nv.data); 177 free(status); 178 return (NULL); 179 } 180 181 nvl = nvlist_unpack(nv.data, nv.len, 0); 182 free(nv.data); 183 if (nvl == NULL) { 184 free(status); 185 return (NULL); 186 } 187 188 status->running = nvlist_get_bool(nvl, "running"); 189 status->since = nvlist_get_number(nvl, "since"); 190 status->debug = nvlist_get_number(nvl, "debug"); 191 status->hostid = nvlist_get_number(nvl, "hostid"); 192 status->states = nvlist_get_number(nvl, "states"); 193 status->src_nodes = nvlist_get_number(nvl, "src_nodes"); 194 195 strlcpy(status->ifname, nvlist_get_string(nvl, "ifname"), 196 IFNAMSIZ); 197 chksum = nvlist_get_binary(nvl, "chksum", &len); 198 assert(len == PF_MD5_DIGEST_LENGTH); 199 memcpy(status->pf_chksum, chksum, len); 200 201 _pfctl_get_status_counters(nvlist_get_nvlist(nvl, "counters"), 202 &status->counters); 203 _pfctl_get_status_counters(nvlist_get_nvlist(nvl, "lcounters"), 204 &status->lcounters); 205 _pfctl_get_status_counters(nvlist_get_nvlist(nvl, "fcounters"), 206 &status->fcounters); 207 _pfctl_get_status_counters(nvlist_get_nvlist(nvl, "scounters"), 208 &status->scounters); 209 210 pf_nvuint_64_array(nvl, "pcounters", 2 * 2 * 3, 211 (uint64_t *)status->pcounters, NULL); 212 pf_nvuint_64_array(nvl, "bcounters", 2 * 2, 213 (uint64_t *)status->bcounters, NULL); 214 215 nvlist_destroy(nvl); 216 217 return (status); 218 } 219 220 void 221 pfctl_free_status(struct pfctl_status *status) 222 { 223 struct pfctl_status_counter *c, *tmp; 224 225 TAILQ_FOREACH_SAFE(c, &status->counters, entry, tmp) { 226 free(c->name); 227 free(c); 228 } 229 TAILQ_FOREACH_SAFE(c, &status->lcounters, entry, tmp) { 230 free(c->name); 231 free(c); 232 } 233 TAILQ_FOREACH_SAFE(c, &status->fcounters, entry, tmp) { 234 free(c->name); 235 free(c); 236 } 237 TAILQ_FOREACH_SAFE(c, &status->scounters, entry, tmp) { 238 free(c->name); 239 free(c); 240 } 241 242 free(status); 243 } 244 245 static void 246 pfctl_nv_add_addr(nvlist_t *nvparent, const char *name, 247 const struct pf_addr *addr) 248 { 249 nvlist_t *nvl = nvlist_create(0); 250 251 nvlist_add_binary(nvl, "addr", addr, sizeof(*addr)); 252 253 nvlist_add_nvlist(nvparent, name, nvl); 254 nvlist_destroy(nvl); 255 } 256 257 static void 258 pf_nvaddr_to_addr(const nvlist_t *nvl, struct pf_addr *addr) 259 { 260 size_t len; 261 const void *data; 262 263 data = nvlist_get_binary(nvl, "addr", &len); 264 assert(len == sizeof(struct pf_addr)); 265 memcpy(addr, data, len); 266 } 267 268 static void 269 pfctl_nv_add_addr_wrap(nvlist_t *nvparent, const char *name, 270 const struct pf_addr_wrap *addr) 271 { 272 nvlist_t *nvl = nvlist_create(0); 273 274 nvlist_add_number(nvl, "type", addr->type); 275 nvlist_add_number(nvl, "iflags", addr->iflags); 276 if (addr->type == PF_ADDR_DYNIFTL) 277 nvlist_add_string(nvl, "ifname", addr->v.ifname); 278 if (addr->type == PF_ADDR_TABLE) 279 nvlist_add_string(nvl, "tblname", addr->v.tblname); 280 pfctl_nv_add_addr(nvl, "addr", &addr->v.a.addr); 281 pfctl_nv_add_addr(nvl, "mask", &addr->v.a.mask); 282 283 nvlist_add_nvlist(nvparent, name, nvl); 284 nvlist_destroy(nvl); 285 } 286 287 static void 288 pf_nvaddr_wrap_to_addr_wrap(const nvlist_t *nvl, struct pf_addr_wrap *addr) 289 { 290 addr->type = nvlist_get_number(nvl, "type"); 291 addr->iflags = nvlist_get_number(nvl, "iflags"); 292 if (addr->type == PF_ADDR_DYNIFTL) 293 strlcpy(addr->v.ifname, nvlist_get_string(nvl, "ifname"), 294 IFNAMSIZ); 295 if (addr->type == PF_ADDR_TABLE) 296 strlcpy(addr->v.tblname, nvlist_get_string(nvl, "tblname"), 297 PF_TABLE_NAME_SIZE); 298 299 pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "addr"), &addr->v.a.addr); 300 pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "mask"), &addr->v.a.mask); 301 } 302 303 static void 304 pfctl_nv_add_rule_addr(nvlist_t *nvparent, const char *name, 305 const struct pf_rule_addr *addr) 306 { 307 u_int64_t ports[2]; 308 nvlist_t *nvl = nvlist_create(0); 309 310 pfctl_nv_add_addr_wrap(nvl, "addr", &addr->addr); 311 ports[0] = addr->port[0]; 312 ports[1] = addr->port[1]; 313 nvlist_add_number_array(nvl, "port", ports, 2); 314 nvlist_add_number(nvl, "neg", addr->neg); 315 nvlist_add_number(nvl, "port_op", addr->port_op); 316 317 nvlist_add_nvlist(nvparent, name, nvl); 318 nvlist_destroy(nvl); 319 } 320 321 static void 322 pf_nvrule_addr_to_rule_addr(const nvlist_t *nvl, struct pf_rule_addr *addr) 323 { 324 pf_nvaddr_wrap_to_addr_wrap(nvlist_get_nvlist(nvl, "addr"), &addr->addr); 325 326 pf_nvuint_16_array(nvl, "port", 2, addr->port, NULL); 327 addr->neg = nvlist_get_number(nvl, "neg"); 328 addr->port_op = nvlist_get_number(nvl, "port_op"); 329 } 330 331 static void 332 pfctl_nv_add_mape(nvlist_t *nvparent, const char *name, 333 const struct pf_mape_portset *mape) 334 { 335 nvlist_t *nvl = nvlist_create(0); 336 337 nvlist_add_number(nvl, "offset", mape->offset); 338 nvlist_add_number(nvl, "psidlen", mape->psidlen); 339 nvlist_add_number(nvl, "psid", mape->psid); 340 nvlist_add_nvlist(nvparent, name, nvl); 341 nvlist_destroy(nvl); 342 } 343 344 static void 345 pfctl_nv_add_pool(nvlist_t *nvparent, const char *name, 346 const struct pfctl_pool *pool) 347 { 348 u_int64_t ports[2]; 349 nvlist_t *nvl = nvlist_create(0); 350 351 nvlist_add_binary(nvl, "key", &pool->key, sizeof(pool->key)); 352 pfctl_nv_add_addr(nvl, "counter", &pool->counter); 353 nvlist_add_number(nvl, "tblidx", pool->tblidx); 354 355 ports[0] = pool->proxy_port[0]; 356 ports[1] = pool->proxy_port[1]; 357 nvlist_add_number_array(nvl, "proxy_port", ports, 2); 358 nvlist_add_number(nvl, "opts", pool->opts); 359 pfctl_nv_add_mape(nvl, "mape", &pool->mape); 360 361 nvlist_add_nvlist(nvparent, name, nvl); 362 nvlist_destroy(nvl); 363 } 364 365 static void 366 pf_nvmape_to_mape(const nvlist_t *nvl, struct pf_mape_portset *mape) 367 { 368 mape->offset = nvlist_get_number(nvl, "offset"); 369 mape->psidlen = nvlist_get_number(nvl, "psidlen"); 370 mape->psid = nvlist_get_number(nvl, "psid"); 371 } 372 373 static void 374 pf_nvpool_to_pool(const nvlist_t *nvl, struct pfctl_pool *pool) 375 { 376 size_t len; 377 const void *data; 378 379 data = nvlist_get_binary(nvl, "key", &len); 380 assert(len == sizeof(pool->key)); 381 memcpy(&pool->key, data, len); 382 383 pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "counter"), &pool->counter); 384 385 pool->tblidx = nvlist_get_number(nvl, "tblidx"); 386 pf_nvuint_16_array(nvl, "proxy_port", 2, pool->proxy_port, NULL); 387 pool->opts = nvlist_get_number(nvl, "opts"); 388 389 if (nvlist_exists_nvlist(nvl, "mape")) 390 pf_nvmape_to_mape(nvlist_get_nvlist(nvl, "mape"), &pool->mape); 391 } 392 393 static void 394 pfctl_nv_add_uid(nvlist_t *nvparent, const char *name, 395 const struct pf_rule_uid *uid) 396 { 397 u_int64_t uids[2]; 398 nvlist_t *nvl = nvlist_create(0); 399 400 uids[0] = uid->uid[0]; 401 uids[1] = uid->uid[1]; 402 nvlist_add_number_array(nvl, "uid", uids, 2); 403 nvlist_add_number(nvl, "op", uid->op); 404 405 nvlist_add_nvlist(nvparent, name, nvl); 406 nvlist_destroy(nvl); 407 } 408 409 static void 410 pf_nvrule_uid_to_rule_uid(const nvlist_t *nvl, struct pf_rule_uid *uid) 411 { 412 pf_nvuint_32_array(nvl, "uid", 2, uid->uid, NULL); 413 uid->op = nvlist_get_number(nvl, "op"); 414 } 415 416 static void 417 pfctl_nv_add_divert(nvlist_t *nvparent, const char *name, 418 const struct pfctl_rule *r) 419 { 420 nvlist_t *nvl = nvlist_create(0); 421 422 pfctl_nv_add_addr(nvl, "addr", &r->divert.addr); 423 nvlist_add_number(nvl, "port", r->divert.port); 424 425 nvlist_add_nvlist(nvparent, name, nvl); 426 nvlist_destroy(nvl); 427 } 428 429 static void 430 pf_nvdivert_to_divert(const nvlist_t *nvl, struct pfctl_rule *rule) 431 { 432 pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "addr"), &rule->divert.addr); 433 rule->divert.port = nvlist_get_number(nvl, "port"); 434 } 435 436 static void 437 pf_nvrule_to_rule(const nvlist_t *nvl, struct pfctl_rule *rule) 438 { 439 const uint64_t *skip; 440 const char *const *labels; 441 size_t skipcount, labelcount; 442 443 rule->nr = nvlist_get_number(nvl, "nr"); 444 445 pf_nvrule_addr_to_rule_addr(nvlist_get_nvlist(nvl, "src"), &rule->src); 446 pf_nvrule_addr_to_rule_addr(nvlist_get_nvlist(nvl, "dst"), &rule->dst); 447 448 skip = nvlist_get_number_array(nvl, "skip", &skipcount); 449 assert(skip); 450 assert(skipcount == PF_SKIP_COUNT); 451 for (int i = 0; i < PF_SKIP_COUNT; i++) 452 rule->skip[i].nr = skip[i]; 453 454 labels = nvlist_get_string_array(nvl, "labels", &labelcount); 455 assert(labelcount <= PF_RULE_MAX_LABEL_COUNT); 456 for (size_t i = 0; i < labelcount; i++) 457 strlcpy(rule->label[i], labels[i], PF_RULE_LABEL_SIZE); 458 strlcpy(rule->ifname, nvlist_get_string(nvl, "ifname"), IFNAMSIZ); 459 strlcpy(rule->qname, nvlist_get_string(nvl, "qname"), PF_QNAME_SIZE); 460 strlcpy(rule->pqname, nvlist_get_string(nvl, "pqname"), PF_QNAME_SIZE); 461 strlcpy(rule->tagname, nvlist_get_string(nvl, "tagname"), 462 PF_TAG_NAME_SIZE); 463 strlcpy(rule->match_tagname, nvlist_get_string(nvl, "match_tagname"), 464 PF_TAG_NAME_SIZE); 465 466 strlcpy(rule->overload_tblname, nvlist_get_string(nvl, "overload_tblname"), 467 PF_TABLE_NAME_SIZE); 468 469 pf_nvpool_to_pool(nvlist_get_nvlist(nvl, "rpool"), &rule->rpool); 470 471 rule->evaluations = nvlist_get_number(nvl, "evaluations"); 472 pf_nvuint_64_array(nvl, "packets", 2, rule->packets, NULL); 473 pf_nvuint_64_array(nvl, "bytes", 2, rule->bytes, NULL); 474 475 rule->os_fingerprint = nvlist_get_number(nvl, "os_fingerprint"); 476 477 rule->rtableid = nvlist_get_number(nvl, "rtableid"); 478 pf_nvuint_32_array(nvl, "timeout", PFTM_MAX, rule->timeout, NULL); 479 rule->max_states = nvlist_get_number(nvl, "max_states"); 480 rule->max_src_nodes = nvlist_get_number(nvl, "max_src_nodes"); 481 rule->max_src_states = nvlist_get_number(nvl, "max_src_states"); 482 rule->max_src_conn = nvlist_get_number(nvl, "max_src_conn"); 483 rule->max_src_conn_rate.limit = 484 nvlist_get_number(nvl, "max_src_conn_rate.limit"); 485 rule->max_src_conn_rate.seconds = 486 nvlist_get_number(nvl, "max_src_conn_rate.seconds"); 487 rule->qid = nvlist_get_number(nvl, "qid"); 488 rule->pqid = nvlist_get_number(nvl, "pqid"); 489 rule->prob = nvlist_get_number(nvl, "prob"); 490 rule->cuid = nvlist_get_number(nvl, "cuid"); 491 rule->cpid = nvlist_get_number(nvl, "cpid"); 492 493 rule->return_icmp = nvlist_get_number(nvl, "return_icmp"); 494 rule->return_icmp6 = nvlist_get_number(nvl, "return_icmp6"); 495 rule->max_mss = nvlist_get_number(nvl, "max_mss"); 496 rule->scrub_flags = nvlist_get_number(nvl, "scrub_flags"); 497 498 pf_nvrule_uid_to_rule_uid(nvlist_get_nvlist(nvl, "uid"), &rule->uid); 499 pf_nvrule_uid_to_rule_uid(nvlist_get_nvlist(nvl, "gid"), 500 (struct pf_rule_uid *)&rule->gid); 501 502 rule->rule_flag = nvlist_get_number(nvl, "rule_flag"); 503 rule->action = nvlist_get_number(nvl, "action"); 504 rule->direction = nvlist_get_number(nvl, "direction"); 505 rule->log = nvlist_get_number(nvl, "log"); 506 rule->logif = nvlist_get_number(nvl, "logif"); 507 rule->quick = nvlist_get_number(nvl, "quick"); 508 rule->ifnot = nvlist_get_number(nvl, "ifnot"); 509 rule->match_tag_not = nvlist_get_number(nvl, "match_tag_not"); 510 rule->natpass = nvlist_get_number(nvl, "natpass"); 511 512 rule->keep_state = nvlist_get_number(nvl, "keep_state"); 513 rule->af = nvlist_get_number(nvl, "af"); 514 rule->proto = nvlist_get_number(nvl, "proto"); 515 rule->type = nvlist_get_number(nvl, "type"); 516 rule->code = nvlist_get_number(nvl, "code"); 517 rule->flags = nvlist_get_number(nvl, "flags"); 518 rule->flagset = nvlist_get_number(nvl, "flagset"); 519 rule->min_ttl = nvlist_get_number(nvl, "min_ttl"); 520 rule->allow_opts = nvlist_get_number(nvl, "allow_opts"); 521 rule->rt = nvlist_get_number(nvl, "rt"); 522 rule->return_ttl = nvlist_get_number(nvl, "return_ttl"); 523 rule->tos = nvlist_get_number(nvl, "tos"); 524 rule->set_tos = nvlist_get_number(nvl, "set_tos"); 525 rule->anchor_relative = nvlist_get_number(nvl, "anchor_relative"); 526 rule->anchor_wildcard = nvlist_get_number(nvl, "anchor_wildcard"); 527 528 rule->flush = nvlist_get_number(nvl, "flush"); 529 rule->prio = nvlist_get_number(nvl, "prio"); 530 pf_nvuint_8_array(nvl, "set_prio", 2, rule->set_prio, NULL); 531 532 pf_nvdivert_to_divert(nvlist_get_nvlist(nvl, "divert"), rule); 533 534 rule->states_cur = nvlist_get_number(nvl, "states_cur"); 535 rule->states_tot = nvlist_get_number(nvl, "states_tot"); 536 rule->src_nodes = nvlist_get_number(nvl, "src_nodes"); 537 } 538 539 int 540 pfctl_add_rule(int dev, const struct pfctl_rule *r, const char *anchor, 541 const char *anchor_call, u_int32_t ticket, u_int32_t pool_ticket) 542 { 543 struct pfioc_nv nv; 544 u_int64_t timeouts[PFTM_MAX]; 545 u_int64_t set_prio[2]; 546 nvlist_t *nvl, *nvlr; 547 size_t labelcount; 548 int ret; 549 550 nvl = nvlist_create(0); 551 nvlr = nvlist_create(0); 552 553 nvlist_add_number(nvl, "ticket", ticket); 554 nvlist_add_number(nvl, "pool_ticket", pool_ticket); 555 nvlist_add_string(nvl, "anchor", anchor); 556 nvlist_add_string(nvl, "anchor_call", anchor_call); 557 558 nvlist_add_number(nvlr, "nr", r->nr); 559 pfctl_nv_add_rule_addr(nvlr, "src", &r->src); 560 pfctl_nv_add_rule_addr(nvlr, "dst", &r->dst); 561 562 labelcount = 0; 563 while (r->label[labelcount][0] != 0 && 564 labelcount < PF_RULE_MAX_LABEL_COUNT) { 565 nvlist_append_string_array(nvlr, "labels", 566 r->label[labelcount]); 567 labelcount++; 568 } 569 570 nvlist_add_string(nvlr, "ifname", r->ifname); 571 nvlist_add_string(nvlr, "qname", r->qname); 572 nvlist_add_string(nvlr, "pqname", r->pqname); 573 nvlist_add_string(nvlr, "tagname", r->tagname); 574 nvlist_add_string(nvlr, "match_tagname", r->match_tagname); 575 nvlist_add_string(nvlr, "overload_tblname", r->overload_tblname); 576 577 pfctl_nv_add_pool(nvlr, "rpool", &r->rpool); 578 579 nvlist_add_number(nvlr, "os_fingerprint", r->os_fingerprint); 580 581 nvlist_add_number(nvlr, "rtableid", r->rtableid); 582 for (int i = 0; i < PFTM_MAX; i++) 583 timeouts[i] = r->timeout[i]; 584 nvlist_add_number_array(nvlr, "timeout", timeouts, PFTM_MAX); 585 nvlist_add_number(nvlr, "max_states", r->max_states); 586 nvlist_add_number(nvlr, "max_src_nodes", r->max_src_nodes); 587 nvlist_add_number(nvlr, "max_src_states", r->max_src_states); 588 nvlist_add_number(nvlr, "max_src_conn", r->max_src_conn); 589 nvlist_add_number(nvlr, "max_src_conn_rate.limit", 590 r->max_src_conn_rate.limit); 591 nvlist_add_number(nvlr, "max_src_conn_rate.seconds", 592 r->max_src_conn_rate.seconds); 593 nvlist_add_number(nvlr, "prob", r->prob); 594 nvlist_add_number(nvlr, "cuid", r->cuid); 595 nvlist_add_number(nvlr, "cpid", r->cpid); 596 597 nvlist_add_number(nvlr, "return_icmp", r->return_icmp); 598 nvlist_add_number(nvlr, "return_icmp6", r->return_icmp6); 599 600 nvlist_add_number(nvlr, "max_mss", r->max_mss); 601 nvlist_add_number(nvlr, "scrub_flags", r->scrub_flags); 602 603 pfctl_nv_add_uid(nvlr, "uid", &r->uid); 604 pfctl_nv_add_uid(nvlr, "gid", (const struct pf_rule_uid *)&r->gid); 605 606 nvlist_add_number(nvlr, "rule_flag", r->rule_flag); 607 nvlist_add_number(nvlr, "action", r->action); 608 nvlist_add_number(nvlr, "direction", r->direction); 609 nvlist_add_number(nvlr, "log", r->log); 610 nvlist_add_number(nvlr, "logif", r->logif); 611 nvlist_add_number(nvlr, "quick", r->quick); 612 nvlist_add_number(nvlr, "ifnot", r->ifnot); 613 nvlist_add_number(nvlr, "match_tag_not", r->match_tag_not); 614 nvlist_add_number(nvlr, "natpass", r->natpass); 615 616 nvlist_add_number(nvlr, "keep_state", r->keep_state); 617 nvlist_add_number(nvlr, "af", r->af); 618 nvlist_add_number(nvlr, "proto", r->proto); 619 nvlist_add_number(nvlr, "type", r->type); 620 nvlist_add_number(nvlr, "code", r->code); 621 nvlist_add_number(nvlr, "flags", r->flags); 622 nvlist_add_number(nvlr, "flagset", r->flagset); 623 nvlist_add_number(nvlr, "min_ttl", r->min_ttl); 624 nvlist_add_number(nvlr, "allow_opts", r->allow_opts); 625 nvlist_add_number(nvlr, "rt", r->rt); 626 nvlist_add_number(nvlr, "return_ttl", r->return_ttl); 627 nvlist_add_number(nvlr, "tos", r->tos); 628 nvlist_add_number(nvlr, "set_tos", r->set_tos); 629 nvlist_add_number(nvlr, "anchor_relative", r->anchor_relative); 630 nvlist_add_number(nvlr, "anchor_wildcard", r->anchor_wildcard); 631 632 nvlist_add_number(nvlr, "flush", r->flush); 633 634 nvlist_add_number(nvlr, "prio", r->prio); 635 set_prio[0] = r->set_prio[0]; 636 set_prio[1] = r->set_prio[1]; 637 nvlist_add_number_array(nvlr, "set_prio", set_prio, 2); 638 639 pfctl_nv_add_divert(nvlr, "divert", r); 640 641 nvlist_add_nvlist(nvl, "rule", nvlr); 642 nvlist_destroy(nvlr); 643 644 /* Now do the call. */ 645 nv.data = nvlist_pack(nvl, &nv.len); 646 nv.size = nv.len; 647 648 ret = ioctl(dev, DIOCADDRULENV, &nv); 649 650 free(nv.data); 651 nvlist_destroy(nvl); 652 653 return (ret); 654 } 655 656 int 657 pfctl_get_rule(int dev, u_int32_t nr, u_int32_t ticket, const char *anchor, 658 u_int32_t ruleset, struct pfctl_rule *rule, char *anchor_call) 659 { 660 return (pfctl_get_clear_rule(dev, nr, ticket, anchor, ruleset, rule, 661 anchor_call, false)); 662 } 663 664 int pfctl_get_clear_rule(int dev, u_int32_t nr, u_int32_t ticket, 665 const char *anchor, u_int32_t ruleset, struct pfctl_rule *rule, 666 char *anchor_call, bool clear) 667 { 668 struct pfioc_nv nv; 669 nvlist_t *nvl; 670 void *nvlpacked; 671 int ret; 672 673 nvl = nvlist_create(0); 674 if (nvl == 0) 675 return (ENOMEM); 676 677 nvlist_add_number(nvl, "nr", nr); 678 nvlist_add_number(nvl, "ticket", ticket); 679 nvlist_add_string(nvl, "anchor", anchor); 680 nvlist_add_number(nvl, "ruleset", ruleset); 681 682 if (clear) 683 nvlist_add_bool(nvl, "clear_counter", true); 684 685 nvlpacked = nvlist_pack(nvl, &nv.len); 686 if (nvlpacked == NULL) { 687 nvlist_destroy(nvl); 688 return (ENOMEM); 689 } 690 nv.data = malloc(8182); 691 nv.size = 8192; 692 assert(nv.len <= nv.size); 693 memcpy(nv.data, nvlpacked, nv.len); 694 nvlist_destroy(nvl); 695 nvl = NULL; 696 free(nvlpacked); 697 698 ret = ioctl(dev, DIOCGETRULENV, &nv); 699 if (ret != 0) { 700 free(nv.data); 701 return (ret); 702 } 703 704 nvl = nvlist_unpack(nv.data, nv.len, 0); 705 if (nvl == NULL) { 706 free(nv.data); 707 return (EIO); 708 } 709 710 pf_nvrule_to_rule(nvlist_get_nvlist(nvl, "rule"), rule); 711 712 if (anchor_call) 713 strlcpy(anchor_call, nvlist_get_string(nvl, "anchor_call"), 714 MAXPATHLEN); 715 716 free(nv.data); 717 nvlist_destroy(nvl); 718 719 return (0); 720 } 721 722 int 723 pfctl_set_keepcounters(int dev, bool keep) 724 { 725 struct pfioc_nv nv; 726 nvlist_t *nvl; 727 int ret; 728 729 nvl = nvlist_create(0); 730 731 nvlist_add_bool(nvl, "keep_counters", keep); 732 733 nv.data = nvlist_pack(nvl, &nv.len); 734 nv.size = nv.len; 735 736 nvlist_destroy(nvl); 737 738 ret = ioctl(dev, DIOCKEEPCOUNTERS, &nv); 739 740 free(nv.data); 741 return (ret); 742 } 743 744 static void 745 pfctl_nv_add_state_cmp(nvlist_t *nvl, const char *name, 746 const struct pfctl_state_cmp *cmp) 747 { 748 nvlist_t *nv; 749 750 nv = nvlist_create(0); 751 752 nvlist_add_number(nv, "id", cmp->id); 753 nvlist_add_number(nv, "creatorid", cmp->creatorid); 754 nvlist_add_number(nv, "direction", cmp->direction); 755 756 nvlist_add_nvlist(nvl, name, nv); 757 nvlist_destroy(nv); 758 } 759 760 static void 761 pf_state_key_export_to_state_key(struct pfctl_state_key *ps, 762 const struct pf_state_key_export *s) 763 { 764 bcopy(s->addr, ps->addr, sizeof(ps->addr[0]) * 2); 765 ps->port[0] = s->port[0]; 766 ps->port[1] = s->port[1]; 767 } 768 769 static void 770 pf_state_peer_export_to_state_peer(struct pfctl_state_peer *ps, 771 const struct pf_state_peer_export *s) 772 { 773 /* Ignore scrub. */ 774 ps->seqlo = s->seqlo; 775 ps->seqhi = s->seqhi; 776 ps->seqdiff = s->seqdiff; 777 /* Ignore max_win & mss */ 778 ps->state = s->state; 779 ps->wscale = s->wscale; 780 } 781 782 static void 783 pf_state_export_to_state(struct pfctl_state *ps, const struct pf_state_export *s) 784 { 785 assert(s->version >= PF_STATE_VERSION); 786 787 ps->id = s->id; 788 strlcpy(ps->ifname, s->ifname, sizeof(ps->ifname)); 789 strlcpy(ps->orig_ifname, s->orig_ifname, sizeof(ps->orig_ifname)); 790 pf_state_key_export_to_state_key(&ps->key[0], &s->key[0]); 791 pf_state_key_export_to_state_key(&ps->key[1], &s->key[1]); 792 pf_state_peer_export_to_state_peer(&ps->src, &s->src); 793 pf_state_peer_export_to_state_peer(&ps->dst, &s->dst); 794 bcopy(&s->rt_addr, &ps->rt_addr, sizeof(ps->rt_addr)); 795 ps->rule = ntohl(s->rule); 796 ps->anchor = ntohl(s->anchor); 797 ps->nat_rule = ntohl(s->nat_rule); 798 ps->creation = ntohl(s->creation); 799 ps->expire = ntohl(s->expire); 800 ps->packets[0] = s->packets[0]; 801 ps->packets[1] = s->packets[1]; 802 ps->bytes[0] = s->bytes[0]; 803 ps->bytes[1] = s->bytes[1]; 804 ps->creatorid = s->creatorid; 805 ps->key[0].proto = s->proto; 806 ps->key[1].proto = s->proto; 807 ps->key[0].af = s->af; 808 ps->key[1].af = s->af; 809 ps->direction = s->direction; 810 ps->state_flags = s->state_flags; 811 ps->sync_flags = s->sync_flags; 812 } 813 814 int 815 pfctl_get_states(int dev, struct pfctl_states *states) 816 { 817 struct pfioc_states_v2 ps; 818 struct pf_state_export *p; 819 char *inbuf = NULL, *newinbuf = NULL; 820 unsigned int len = 0; 821 int i, error; 822 823 bzero(&ps, sizeof(ps)); 824 ps.ps_req_version = PF_STATE_VERSION; 825 826 bzero(states, sizeof(*states)); 827 TAILQ_INIT(&states->states); 828 829 for (;;) { 830 ps.ps_len = len; 831 if (len) { 832 newinbuf = realloc(inbuf, len); 833 if (newinbuf == NULL) 834 return (ENOMEM); 835 ps.ps_buf = inbuf = newinbuf; 836 } 837 if ((error = ioctl(dev, DIOCGETSTATESV2, &ps)) < 0) { 838 free(inbuf); 839 return (error); 840 } 841 if (ps.ps_len + sizeof(struct pfioc_states_v2) < len) 842 break; 843 if (len == 0 && ps.ps_len == 0) 844 goto out; 845 if (len == 0 && ps.ps_len != 0) 846 len = ps.ps_len; 847 if (ps.ps_len == 0) 848 goto out; /* no states */ 849 len *= 2; 850 } 851 p = ps.ps_states; 852 853 for (i = 0; i < ps.ps_len; i += sizeof(*p), p++) { 854 struct pfctl_state *s = malloc(sizeof(*s)); 855 if (s == NULL) { 856 pfctl_free_states(states); 857 error = ENOMEM; 858 goto out; 859 } 860 861 pf_state_export_to_state(s, p); 862 TAILQ_INSERT_TAIL(&states->states, s, entry); 863 } 864 865 out: 866 free(inbuf); 867 return (error); 868 } 869 870 void 871 pfctl_free_states(struct pfctl_states *states) 872 { 873 struct pfctl_state *s, *tmp; 874 875 TAILQ_FOREACH_SAFE(s, &states->states, entry, tmp) { 876 free(s); 877 } 878 879 bzero(states, sizeof(*states)); 880 } 881 882 static int 883 _pfctl_clear_states(int dev, const struct pfctl_kill *kill, 884 unsigned int *killed, uint64_t ioctlval) 885 { 886 struct pfioc_nv nv; 887 nvlist_t *nvl; 888 int ret; 889 890 nvl = nvlist_create(0); 891 892 pfctl_nv_add_state_cmp(nvl, "cmp", &kill->cmp); 893 nvlist_add_number(nvl, "af", kill->af); 894 nvlist_add_number(nvl, "proto", kill->proto); 895 pfctl_nv_add_rule_addr(nvl, "src", &kill->src); 896 pfctl_nv_add_rule_addr(nvl, "dst", &kill->dst); 897 pfctl_nv_add_rule_addr(nvl, "rt_addr", &kill->rt_addr); 898 nvlist_add_string(nvl, "ifname", kill->ifname); 899 nvlist_add_string(nvl, "label", kill->label); 900 nvlist_add_bool(nvl, "kill_match", kill->kill_match); 901 902 nv.data = nvlist_pack(nvl, &nv.len); 903 nv.size = nv.len; 904 nvlist_destroy(nvl); 905 nvl = NULL; 906 907 ret = ioctl(dev, ioctlval, &nv); 908 if (ret != 0) { 909 free(nv.data); 910 return (ret); 911 } 912 913 nvl = nvlist_unpack(nv.data, nv.len, 0); 914 if (nvl == NULL) { 915 free(nv.data); 916 return (EIO); 917 } 918 919 if (killed) 920 *killed = nvlist_get_number(nvl, "killed"); 921 922 nvlist_destroy(nvl); 923 free(nv.data); 924 925 return (ret); 926 } 927 928 int 929 pfctl_clear_states(int dev, const struct pfctl_kill *kill, 930 unsigned int *killed) 931 { 932 return (_pfctl_clear_states(dev, kill, killed, DIOCCLRSTATESNV)); 933 } 934 935 int 936 pfctl_kill_states(int dev, const struct pfctl_kill *kill, unsigned int *killed) 937 { 938 return (_pfctl_clear_states(dev, kill, killed, DIOCKILLSTATESNV)); 939 } 940 941 static int 942 pfctl_get_limit(int dev, const int index, u_int *limit) 943 { 944 struct pfioc_limit pl; 945 946 bzero(&pl, sizeof(pl)); 947 pl.index = index; 948 949 if (ioctl(dev, DIOCGETLIMIT, &pl) == -1) 950 return (errno); 951 952 *limit = pl.limit; 953 954 return (0); 955 } 956 957 int 958 pfctl_set_syncookies(int dev, const struct pfctl_syncookies *s) 959 { 960 struct pfioc_nv nv; 961 nvlist_t *nvl; 962 int ret; 963 u_int state_limit; 964 965 ret = pfctl_get_limit(dev, PF_LIMIT_STATES, &state_limit); 966 if (ret != 0) 967 return (ret); 968 969 nvl = nvlist_create(0); 970 971 nvlist_add_bool(nvl, "enabled", s->mode != PFCTL_SYNCOOKIES_NEVER); 972 nvlist_add_bool(nvl, "adaptive", s->mode == PFCTL_SYNCOOKIES_ADAPTIVE); 973 nvlist_add_number(nvl, "highwater", state_limit * s->highwater / 100); 974 nvlist_add_number(nvl, "lowwater", state_limit * s->lowwater / 100); 975 976 nv.data = nvlist_pack(nvl, &nv.len); 977 nv.size = nv.len; 978 nvlist_destroy(nvl); 979 nvl = NULL; 980 981 ret = ioctl(dev, DIOCSETSYNCOOKIES, &nv); 982 983 free(nv.data); 984 return (ret); 985 } 986 987 int 988 pfctl_get_syncookies(int dev, struct pfctl_syncookies *s) 989 { 990 struct pfioc_nv nv; 991 nvlist_t *nvl; 992 int ret; 993 u_int state_limit; 994 bool enabled, adaptive; 995 996 ret = pfctl_get_limit(dev, PF_LIMIT_STATES, &state_limit); 997 if (ret != 0) 998 return (ret); 999 1000 bzero(s, sizeof(*s)); 1001 1002 nv.data = malloc(256); 1003 nv.len = nv.size = 256; 1004 1005 if (ioctl(dev, DIOCGETSYNCOOKIES, &nv)) { 1006 free(nv.data); 1007 return (errno); 1008 } 1009 1010 nvl = nvlist_unpack(nv.data, nv.len, 0); 1011 free(nv.data); 1012 if (nvl == NULL) { 1013 return (EIO); 1014 } 1015 1016 enabled = nvlist_get_bool(nvl, "enabled"); 1017 adaptive = nvlist_get_bool(nvl, "adaptive"); 1018 1019 if (enabled) { 1020 if (adaptive) 1021 s->mode = PFCTL_SYNCOOKIES_ADAPTIVE; 1022 else 1023 s->mode = PFCTL_SYNCOOKIES_ALWAYS; 1024 } else { 1025 s->mode = PFCTL_SYNCOOKIES_NEVER; 1026 } 1027 1028 s->highwater = nvlist_get_number(nvl, "highwater") * 100 / state_limit; 1029 s->lowwater = nvlist_get_number(nvl, "lowwater") * 100 / state_limit; 1030 1031 nvlist_destroy(nvl); 1032 1033 return (0); 1034 } 1035