1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net> 4 * Copyright (c) 2016 Pablo Neira Ayuso <pablo@netfilter.org> 5 * 6 * Development of this code funded by Astaro AG (http://www.astaro.com/) 7 */ 8 9 #include <linux/kernel.h> 10 #include <linux/init.h> 11 #include <linux/module.h> 12 #include <linux/netlink.h> 13 #include <linux/netfilter.h> 14 #include <linux/netfilter/nf_tables.h> 15 #include <net/netfilter/nf_tables.h> 16 #include <net/netfilter/nf_conntrack.h> 17 #include <net/netfilter/nf_conntrack_acct.h> 18 #include <net/netfilter/nf_conntrack_tuple.h> 19 #include <net/netfilter/nf_conntrack_helper.h> 20 #include <net/netfilter/nf_conntrack_ecache.h> 21 #include <net/netfilter/nf_conntrack_labels.h> 22 #include <net/netfilter/nf_conntrack_timeout.h> 23 #include <net/netfilter/nf_conntrack_l4proto.h> 24 #include <net/netfilter/nf_conntrack_expect.h> 25 26 struct nft_ct { 27 enum nft_ct_keys key:8; 28 enum ip_conntrack_dir dir:8; 29 union { 30 enum nft_registers dreg:8; 31 enum nft_registers sreg:8; 32 }; 33 }; 34 35 struct nft_ct_helper_obj { 36 struct nf_conntrack_helper *helper4; 37 struct nf_conntrack_helper *helper6; 38 u8 l4proto; 39 }; 40 41 #ifdef CONFIG_NF_CONNTRACK_ZONES 42 static DEFINE_PER_CPU(struct nf_conn *, nft_ct_pcpu_template); 43 static unsigned int nft_ct_pcpu_template_refcnt __read_mostly; 44 #endif 45 46 static u64 nft_ct_get_eval_counter(const struct nf_conn_counter *c, 47 enum nft_ct_keys k, 48 enum ip_conntrack_dir d) 49 { 50 if (d < IP_CT_DIR_MAX) 51 return k == NFT_CT_BYTES ? atomic64_read(&c[d].bytes) : 52 atomic64_read(&c[d].packets); 53 54 return nft_ct_get_eval_counter(c, k, IP_CT_DIR_ORIGINAL) + 55 nft_ct_get_eval_counter(c, k, IP_CT_DIR_REPLY); 56 } 57 58 static void nft_ct_get_eval(const struct nft_expr *expr, 59 struct nft_regs *regs, 60 const struct nft_pktinfo *pkt) 61 { 62 const struct nft_ct *priv = nft_expr_priv(expr); 63 u32 *dest = ®s->data[priv->dreg]; 64 enum ip_conntrack_info ctinfo; 65 const struct nf_conn *ct; 66 const struct nf_conn_help *help; 67 const struct nf_conntrack_tuple *tuple; 68 const struct nf_conntrack_helper *helper; 69 unsigned int state; 70 71 ct = nf_ct_get(pkt->skb, &ctinfo); 72 73 switch (priv->key) { 74 case NFT_CT_STATE: 75 if (ct) 76 state = NF_CT_STATE_BIT(ctinfo); 77 else if (ctinfo == IP_CT_UNTRACKED) 78 state = NF_CT_STATE_UNTRACKED_BIT; 79 else 80 state = NF_CT_STATE_INVALID_BIT; 81 *dest = state; 82 return; 83 default: 84 break; 85 } 86 87 if (ct == NULL) 88 goto err; 89 90 switch (priv->key) { 91 case NFT_CT_DIRECTION: 92 nft_reg_store8(dest, CTINFO2DIR(ctinfo)); 93 return; 94 case NFT_CT_STATUS: 95 *dest = ct->status; 96 return; 97 #ifdef CONFIG_NF_CONNTRACK_MARK 98 case NFT_CT_MARK: 99 *dest = ct->mark; 100 return; 101 #endif 102 #ifdef CONFIG_NF_CONNTRACK_SECMARK 103 case NFT_CT_SECMARK: 104 *dest = ct->secmark; 105 return; 106 #endif 107 case NFT_CT_EXPIRATION: 108 *dest = jiffies_to_msecs(nf_ct_expires(ct)); 109 return; 110 case NFT_CT_HELPER: 111 if (ct->master == NULL) 112 goto err; 113 help = nfct_help(ct->master); 114 if (help == NULL) 115 goto err; 116 helper = rcu_dereference(help->helper); 117 if (helper == NULL) 118 goto err; 119 strncpy((char *)dest, helper->name, NF_CT_HELPER_NAME_LEN); 120 return; 121 #ifdef CONFIG_NF_CONNTRACK_LABELS 122 case NFT_CT_LABELS: { 123 struct nf_conn_labels *labels = nf_ct_labels_find(ct); 124 125 if (labels) 126 memcpy(dest, labels->bits, NF_CT_LABELS_MAX_SIZE); 127 else 128 memset(dest, 0, NF_CT_LABELS_MAX_SIZE); 129 return; 130 } 131 #endif 132 case NFT_CT_BYTES: 133 case NFT_CT_PKTS: { 134 const struct nf_conn_acct *acct = nf_conn_acct_find(ct); 135 u64 count = 0; 136 137 if (acct) 138 count = nft_ct_get_eval_counter(acct->counter, 139 priv->key, priv->dir); 140 memcpy(dest, &count, sizeof(count)); 141 return; 142 } 143 case NFT_CT_AVGPKT: { 144 const struct nf_conn_acct *acct = nf_conn_acct_find(ct); 145 u64 avgcnt = 0, bcnt = 0, pcnt = 0; 146 147 if (acct) { 148 pcnt = nft_ct_get_eval_counter(acct->counter, 149 NFT_CT_PKTS, priv->dir); 150 bcnt = nft_ct_get_eval_counter(acct->counter, 151 NFT_CT_BYTES, priv->dir); 152 if (pcnt != 0) 153 avgcnt = div64_u64(bcnt, pcnt); 154 } 155 156 memcpy(dest, &avgcnt, sizeof(avgcnt)); 157 return; 158 } 159 case NFT_CT_L3PROTOCOL: 160 nft_reg_store8(dest, nf_ct_l3num(ct)); 161 return; 162 case NFT_CT_PROTOCOL: 163 nft_reg_store8(dest, nf_ct_protonum(ct)); 164 return; 165 #ifdef CONFIG_NF_CONNTRACK_ZONES 166 case NFT_CT_ZONE: { 167 const struct nf_conntrack_zone *zone = nf_ct_zone(ct); 168 u16 zoneid; 169 170 if (priv->dir < IP_CT_DIR_MAX) 171 zoneid = nf_ct_zone_id(zone, priv->dir); 172 else 173 zoneid = zone->id; 174 175 nft_reg_store16(dest, zoneid); 176 return; 177 } 178 #endif 179 case NFT_CT_ID: 180 *dest = nf_ct_get_id(ct); 181 return; 182 default: 183 break; 184 } 185 186 tuple = &ct->tuplehash[priv->dir].tuple; 187 switch (priv->key) { 188 case NFT_CT_SRC: 189 memcpy(dest, tuple->src.u3.all, 190 nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16); 191 return; 192 case NFT_CT_DST: 193 memcpy(dest, tuple->dst.u3.all, 194 nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16); 195 return; 196 case NFT_CT_PROTO_SRC: 197 nft_reg_store16(dest, (__force u16)tuple->src.u.all); 198 return; 199 case NFT_CT_PROTO_DST: 200 nft_reg_store16(dest, (__force u16)tuple->dst.u.all); 201 return; 202 case NFT_CT_SRC_IP: 203 if (nf_ct_l3num(ct) != NFPROTO_IPV4) 204 goto err; 205 *dest = tuple->src.u3.ip; 206 return; 207 case NFT_CT_DST_IP: 208 if (nf_ct_l3num(ct) != NFPROTO_IPV4) 209 goto err; 210 *dest = tuple->dst.u3.ip; 211 return; 212 case NFT_CT_SRC_IP6: 213 if (nf_ct_l3num(ct) != NFPROTO_IPV6) 214 goto err; 215 memcpy(dest, tuple->src.u3.ip6, sizeof(struct in6_addr)); 216 return; 217 case NFT_CT_DST_IP6: 218 if (nf_ct_l3num(ct) != NFPROTO_IPV6) 219 goto err; 220 memcpy(dest, tuple->dst.u3.ip6, sizeof(struct in6_addr)); 221 return; 222 default: 223 break; 224 } 225 return; 226 err: 227 regs->verdict.code = NFT_BREAK; 228 } 229 230 #ifdef CONFIG_NF_CONNTRACK_ZONES 231 static void nft_ct_set_zone_eval(const struct nft_expr *expr, 232 struct nft_regs *regs, 233 const struct nft_pktinfo *pkt) 234 { 235 struct nf_conntrack_zone zone = { .dir = NF_CT_DEFAULT_ZONE_DIR }; 236 const struct nft_ct *priv = nft_expr_priv(expr); 237 struct sk_buff *skb = pkt->skb; 238 enum ip_conntrack_info ctinfo; 239 u16 value = nft_reg_load16(®s->data[priv->sreg]); 240 struct nf_conn *ct; 241 242 ct = nf_ct_get(skb, &ctinfo); 243 if (ct) /* already tracked */ 244 return; 245 246 zone.id = value; 247 248 switch (priv->dir) { 249 case IP_CT_DIR_ORIGINAL: 250 zone.dir = NF_CT_ZONE_DIR_ORIG; 251 break; 252 case IP_CT_DIR_REPLY: 253 zone.dir = NF_CT_ZONE_DIR_REPL; 254 break; 255 default: 256 break; 257 } 258 259 ct = this_cpu_read(nft_ct_pcpu_template); 260 261 if (likely(atomic_read(&ct->ct_general.use) == 1)) { 262 nf_ct_zone_add(ct, &zone); 263 } else { 264 /* previous skb got queued to userspace */ 265 ct = nf_ct_tmpl_alloc(nft_net(pkt), &zone, GFP_ATOMIC); 266 if (!ct) { 267 regs->verdict.code = NF_DROP; 268 return; 269 } 270 } 271 272 atomic_inc(&ct->ct_general.use); 273 nf_ct_set(skb, ct, IP_CT_NEW); 274 } 275 #endif 276 277 static void nft_ct_set_eval(const struct nft_expr *expr, 278 struct nft_regs *regs, 279 const struct nft_pktinfo *pkt) 280 { 281 const struct nft_ct *priv = nft_expr_priv(expr); 282 struct sk_buff *skb = pkt->skb; 283 #if defined(CONFIG_NF_CONNTRACK_MARK) || defined(CONFIG_NF_CONNTRACK_SECMARK) 284 u32 value = regs->data[priv->sreg]; 285 #endif 286 enum ip_conntrack_info ctinfo; 287 struct nf_conn *ct; 288 289 ct = nf_ct_get(skb, &ctinfo); 290 if (ct == NULL || nf_ct_is_template(ct)) 291 return; 292 293 switch (priv->key) { 294 #ifdef CONFIG_NF_CONNTRACK_MARK 295 case NFT_CT_MARK: 296 if (ct->mark != value) { 297 ct->mark = value; 298 nf_conntrack_event_cache(IPCT_MARK, ct); 299 } 300 break; 301 #endif 302 #ifdef CONFIG_NF_CONNTRACK_SECMARK 303 case NFT_CT_SECMARK: 304 if (ct->secmark != value) { 305 ct->secmark = value; 306 nf_conntrack_event_cache(IPCT_SECMARK, ct); 307 } 308 break; 309 #endif 310 #ifdef CONFIG_NF_CONNTRACK_LABELS 311 case NFT_CT_LABELS: 312 nf_connlabels_replace(ct, 313 ®s->data[priv->sreg], 314 ®s->data[priv->sreg], 315 NF_CT_LABELS_MAX_SIZE / sizeof(u32)); 316 break; 317 #endif 318 #ifdef CONFIG_NF_CONNTRACK_EVENTS 319 case NFT_CT_EVENTMASK: { 320 struct nf_conntrack_ecache *e = nf_ct_ecache_find(ct); 321 u32 ctmask = regs->data[priv->sreg]; 322 323 if (e) { 324 if (e->ctmask != ctmask) 325 e->ctmask = ctmask; 326 break; 327 } 328 329 if (ctmask && !nf_ct_is_confirmed(ct)) 330 nf_ct_ecache_ext_add(ct, ctmask, 0, GFP_ATOMIC); 331 break; 332 } 333 #endif 334 default: 335 break; 336 } 337 } 338 339 static const struct nla_policy nft_ct_policy[NFTA_CT_MAX + 1] = { 340 [NFTA_CT_DREG] = { .type = NLA_U32 }, 341 [NFTA_CT_KEY] = { .type = NLA_U32 }, 342 [NFTA_CT_DIRECTION] = { .type = NLA_U8 }, 343 [NFTA_CT_SREG] = { .type = NLA_U32 }, 344 }; 345 346 #ifdef CONFIG_NF_CONNTRACK_ZONES 347 static void nft_ct_tmpl_put_pcpu(void) 348 { 349 struct nf_conn *ct; 350 int cpu; 351 352 for_each_possible_cpu(cpu) { 353 ct = per_cpu(nft_ct_pcpu_template, cpu); 354 if (!ct) 355 break; 356 nf_ct_put(ct); 357 per_cpu(nft_ct_pcpu_template, cpu) = NULL; 358 } 359 } 360 361 static bool nft_ct_tmpl_alloc_pcpu(void) 362 { 363 struct nf_conntrack_zone zone = { .id = 0 }; 364 struct nf_conn *tmp; 365 int cpu; 366 367 if (nft_ct_pcpu_template_refcnt) 368 return true; 369 370 for_each_possible_cpu(cpu) { 371 tmp = nf_ct_tmpl_alloc(&init_net, &zone, GFP_KERNEL); 372 if (!tmp) { 373 nft_ct_tmpl_put_pcpu(); 374 return false; 375 } 376 377 atomic_set(&tmp->ct_general.use, 1); 378 per_cpu(nft_ct_pcpu_template, cpu) = tmp; 379 } 380 381 return true; 382 } 383 #endif 384 385 static int nft_ct_get_init(const struct nft_ctx *ctx, 386 const struct nft_expr *expr, 387 const struct nlattr * const tb[]) 388 { 389 struct nft_ct *priv = nft_expr_priv(expr); 390 unsigned int len; 391 int err; 392 393 priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY])); 394 priv->dir = IP_CT_DIR_MAX; 395 switch (priv->key) { 396 case NFT_CT_DIRECTION: 397 if (tb[NFTA_CT_DIRECTION] != NULL) 398 return -EINVAL; 399 len = sizeof(u8); 400 break; 401 case NFT_CT_STATE: 402 case NFT_CT_STATUS: 403 #ifdef CONFIG_NF_CONNTRACK_MARK 404 case NFT_CT_MARK: 405 #endif 406 #ifdef CONFIG_NF_CONNTRACK_SECMARK 407 case NFT_CT_SECMARK: 408 #endif 409 case NFT_CT_EXPIRATION: 410 if (tb[NFTA_CT_DIRECTION] != NULL) 411 return -EINVAL; 412 len = sizeof(u32); 413 break; 414 #ifdef CONFIG_NF_CONNTRACK_LABELS 415 case NFT_CT_LABELS: 416 if (tb[NFTA_CT_DIRECTION] != NULL) 417 return -EINVAL; 418 len = NF_CT_LABELS_MAX_SIZE; 419 break; 420 #endif 421 case NFT_CT_HELPER: 422 if (tb[NFTA_CT_DIRECTION] != NULL) 423 return -EINVAL; 424 len = NF_CT_HELPER_NAME_LEN; 425 break; 426 427 case NFT_CT_L3PROTOCOL: 428 case NFT_CT_PROTOCOL: 429 /* For compatibility, do not report error if NFTA_CT_DIRECTION 430 * attribute is specified. 431 */ 432 len = sizeof(u8); 433 break; 434 case NFT_CT_SRC: 435 case NFT_CT_DST: 436 if (tb[NFTA_CT_DIRECTION] == NULL) 437 return -EINVAL; 438 439 switch (ctx->family) { 440 case NFPROTO_IPV4: 441 len = sizeof_field(struct nf_conntrack_tuple, 442 src.u3.ip); 443 break; 444 case NFPROTO_IPV6: 445 case NFPROTO_INET: 446 len = sizeof_field(struct nf_conntrack_tuple, 447 src.u3.ip6); 448 break; 449 default: 450 return -EAFNOSUPPORT; 451 } 452 break; 453 case NFT_CT_SRC_IP: 454 case NFT_CT_DST_IP: 455 if (tb[NFTA_CT_DIRECTION] == NULL) 456 return -EINVAL; 457 458 len = sizeof_field(struct nf_conntrack_tuple, src.u3.ip); 459 break; 460 case NFT_CT_SRC_IP6: 461 case NFT_CT_DST_IP6: 462 if (tb[NFTA_CT_DIRECTION] == NULL) 463 return -EINVAL; 464 465 len = sizeof_field(struct nf_conntrack_tuple, src.u3.ip6); 466 break; 467 case NFT_CT_PROTO_SRC: 468 case NFT_CT_PROTO_DST: 469 if (tb[NFTA_CT_DIRECTION] == NULL) 470 return -EINVAL; 471 len = sizeof_field(struct nf_conntrack_tuple, src.u.all); 472 break; 473 case NFT_CT_BYTES: 474 case NFT_CT_PKTS: 475 case NFT_CT_AVGPKT: 476 len = sizeof(u64); 477 break; 478 #ifdef CONFIG_NF_CONNTRACK_ZONES 479 case NFT_CT_ZONE: 480 len = sizeof(u16); 481 break; 482 #endif 483 case NFT_CT_ID: 484 len = sizeof(u32); 485 break; 486 default: 487 return -EOPNOTSUPP; 488 } 489 490 if (tb[NFTA_CT_DIRECTION] != NULL) { 491 priv->dir = nla_get_u8(tb[NFTA_CT_DIRECTION]); 492 switch (priv->dir) { 493 case IP_CT_DIR_ORIGINAL: 494 case IP_CT_DIR_REPLY: 495 break; 496 default: 497 return -EINVAL; 498 } 499 } 500 501 priv->dreg = nft_parse_register(tb[NFTA_CT_DREG]); 502 err = nft_validate_register_store(ctx, priv->dreg, NULL, 503 NFT_DATA_VALUE, len); 504 if (err < 0) 505 return err; 506 507 err = nf_ct_netns_get(ctx->net, ctx->family); 508 if (err < 0) 509 return err; 510 511 if (priv->key == NFT_CT_BYTES || 512 priv->key == NFT_CT_PKTS || 513 priv->key == NFT_CT_AVGPKT) 514 nf_ct_set_acct(ctx->net, true); 515 516 return 0; 517 } 518 519 static void __nft_ct_set_destroy(const struct nft_ctx *ctx, struct nft_ct *priv) 520 { 521 switch (priv->key) { 522 #ifdef CONFIG_NF_CONNTRACK_LABELS 523 case NFT_CT_LABELS: 524 nf_connlabels_put(ctx->net); 525 break; 526 #endif 527 #ifdef CONFIG_NF_CONNTRACK_ZONES 528 case NFT_CT_ZONE: 529 if (--nft_ct_pcpu_template_refcnt == 0) 530 nft_ct_tmpl_put_pcpu(); 531 #endif 532 default: 533 break; 534 } 535 } 536 537 static int nft_ct_set_init(const struct nft_ctx *ctx, 538 const struct nft_expr *expr, 539 const struct nlattr * const tb[]) 540 { 541 struct nft_ct *priv = nft_expr_priv(expr); 542 unsigned int len; 543 int err; 544 545 priv->dir = IP_CT_DIR_MAX; 546 priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY])); 547 switch (priv->key) { 548 #ifdef CONFIG_NF_CONNTRACK_MARK 549 case NFT_CT_MARK: 550 if (tb[NFTA_CT_DIRECTION]) 551 return -EINVAL; 552 len = sizeof_field(struct nf_conn, mark); 553 break; 554 #endif 555 #ifdef CONFIG_NF_CONNTRACK_LABELS 556 case NFT_CT_LABELS: 557 if (tb[NFTA_CT_DIRECTION]) 558 return -EINVAL; 559 len = NF_CT_LABELS_MAX_SIZE; 560 err = nf_connlabels_get(ctx->net, (len * BITS_PER_BYTE) - 1); 561 if (err) 562 return err; 563 break; 564 #endif 565 #ifdef CONFIG_NF_CONNTRACK_ZONES 566 case NFT_CT_ZONE: 567 if (!nft_ct_tmpl_alloc_pcpu()) 568 return -ENOMEM; 569 nft_ct_pcpu_template_refcnt++; 570 len = sizeof(u16); 571 break; 572 #endif 573 #ifdef CONFIG_NF_CONNTRACK_EVENTS 574 case NFT_CT_EVENTMASK: 575 if (tb[NFTA_CT_DIRECTION]) 576 return -EINVAL; 577 len = sizeof(u32); 578 break; 579 #endif 580 #ifdef CONFIG_NF_CONNTRACK_SECMARK 581 case NFT_CT_SECMARK: 582 if (tb[NFTA_CT_DIRECTION]) 583 return -EINVAL; 584 len = sizeof(u32); 585 break; 586 #endif 587 default: 588 return -EOPNOTSUPP; 589 } 590 591 if (tb[NFTA_CT_DIRECTION]) { 592 priv->dir = nla_get_u8(tb[NFTA_CT_DIRECTION]); 593 switch (priv->dir) { 594 case IP_CT_DIR_ORIGINAL: 595 case IP_CT_DIR_REPLY: 596 break; 597 default: 598 err = -EINVAL; 599 goto err1; 600 } 601 } 602 603 priv->sreg = nft_parse_register(tb[NFTA_CT_SREG]); 604 err = nft_validate_register_load(priv->sreg, len); 605 if (err < 0) 606 goto err1; 607 608 err = nf_ct_netns_get(ctx->net, ctx->family); 609 if (err < 0) 610 goto err1; 611 612 return 0; 613 614 err1: 615 __nft_ct_set_destroy(ctx, priv); 616 return err; 617 } 618 619 static void nft_ct_get_destroy(const struct nft_ctx *ctx, 620 const struct nft_expr *expr) 621 { 622 nf_ct_netns_put(ctx->net, ctx->family); 623 } 624 625 static void nft_ct_set_destroy(const struct nft_ctx *ctx, 626 const struct nft_expr *expr) 627 { 628 struct nft_ct *priv = nft_expr_priv(expr); 629 630 __nft_ct_set_destroy(ctx, priv); 631 nf_ct_netns_put(ctx->net, ctx->family); 632 } 633 634 static int nft_ct_get_dump(struct sk_buff *skb, const struct nft_expr *expr) 635 { 636 const struct nft_ct *priv = nft_expr_priv(expr); 637 638 if (nft_dump_register(skb, NFTA_CT_DREG, priv->dreg)) 639 goto nla_put_failure; 640 if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key))) 641 goto nla_put_failure; 642 643 switch (priv->key) { 644 case NFT_CT_SRC: 645 case NFT_CT_DST: 646 case NFT_CT_SRC_IP: 647 case NFT_CT_DST_IP: 648 case NFT_CT_SRC_IP6: 649 case NFT_CT_DST_IP6: 650 case NFT_CT_PROTO_SRC: 651 case NFT_CT_PROTO_DST: 652 if (nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir)) 653 goto nla_put_failure; 654 break; 655 case NFT_CT_BYTES: 656 case NFT_CT_PKTS: 657 case NFT_CT_AVGPKT: 658 case NFT_CT_ZONE: 659 if (priv->dir < IP_CT_DIR_MAX && 660 nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir)) 661 goto nla_put_failure; 662 break; 663 default: 664 break; 665 } 666 667 return 0; 668 669 nla_put_failure: 670 return -1; 671 } 672 673 static int nft_ct_set_dump(struct sk_buff *skb, const struct nft_expr *expr) 674 { 675 const struct nft_ct *priv = nft_expr_priv(expr); 676 677 if (nft_dump_register(skb, NFTA_CT_SREG, priv->sreg)) 678 goto nla_put_failure; 679 if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key))) 680 goto nla_put_failure; 681 682 switch (priv->key) { 683 case NFT_CT_ZONE: 684 if (priv->dir < IP_CT_DIR_MAX && 685 nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir)) 686 goto nla_put_failure; 687 break; 688 default: 689 break; 690 } 691 692 return 0; 693 694 nla_put_failure: 695 return -1; 696 } 697 698 static struct nft_expr_type nft_ct_type; 699 static const struct nft_expr_ops nft_ct_get_ops = { 700 .type = &nft_ct_type, 701 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)), 702 .eval = nft_ct_get_eval, 703 .init = nft_ct_get_init, 704 .destroy = nft_ct_get_destroy, 705 .dump = nft_ct_get_dump, 706 }; 707 708 static const struct nft_expr_ops nft_ct_set_ops = { 709 .type = &nft_ct_type, 710 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)), 711 .eval = nft_ct_set_eval, 712 .init = nft_ct_set_init, 713 .destroy = nft_ct_set_destroy, 714 .dump = nft_ct_set_dump, 715 }; 716 717 #ifdef CONFIG_NF_CONNTRACK_ZONES 718 static const struct nft_expr_ops nft_ct_set_zone_ops = { 719 .type = &nft_ct_type, 720 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)), 721 .eval = nft_ct_set_zone_eval, 722 .init = nft_ct_set_init, 723 .destroy = nft_ct_set_destroy, 724 .dump = nft_ct_set_dump, 725 }; 726 #endif 727 728 static const struct nft_expr_ops * 729 nft_ct_select_ops(const struct nft_ctx *ctx, 730 const struct nlattr * const tb[]) 731 { 732 if (tb[NFTA_CT_KEY] == NULL) 733 return ERR_PTR(-EINVAL); 734 735 if (tb[NFTA_CT_DREG] && tb[NFTA_CT_SREG]) 736 return ERR_PTR(-EINVAL); 737 738 if (tb[NFTA_CT_DREG]) 739 return &nft_ct_get_ops; 740 741 if (tb[NFTA_CT_SREG]) { 742 #ifdef CONFIG_NF_CONNTRACK_ZONES 743 if (nla_get_be32(tb[NFTA_CT_KEY]) == htonl(NFT_CT_ZONE)) 744 return &nft_ct_set_zone_ops; 745 #endif 746 return &nft_ct_set_ops; 747 } 748 749 return ERR_PTR(-EINVAL); 750 } 751 752 static struct nft_expr_type nft_ct_type __read_mostly = { 753 .name = "ct", 754 .select_ops = nft_ct_select_ops, 755 .policy = nft_ct_policy, 756 .maxattr = NFTA_CT_MAX, 757 .owner = THIS_MODULE, 758 }; 759 760 static void nft_notrack_eval(const struct nft_expr *expr, 761 struct nft_regs *regs, 762 const struct nft_pktinfo *pkt) 763 { 764 struct sk_buff *skb = pkt->skb; 765 enum ip_conntrack_info ctinfo; 766 struct nf_conn *ct; 767 768 ct = nf_ct_get(pkt->skb, &ctinfo); 769 /* Previously seen (loopback or untracked)? Ignore. */ 770 if (ct || ctinfo == IP_CT_UNTRACKED) 771 return; 772 773 nf_ct_set(skb, ct, IP_CT_UNTRACKED); 774 } 775 776 static struct nft_expr_type nft_notrack_type; 777 static const struct nft_expr_ops nft_notrack_ops = { 778 .type = &nft_notrack_type, 779 .size = NFT_EXPR_SIZE(0), 780 .eval = nft_notrack_eval, 781 }; 782 783 static struct nft_expr_type nft_notrack_type __read_mostly = { 784 .name = "notrack", 785 .ops = &nft_notrack_ops, 786 .owner = THIS_MODULE, 787 }; 788 789 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 790 static int 791 nft_ct_timeout_parse_policy(void *timeouts, 792 const struct nf_conntrack_l4proto *l4proto, 793 struct net *net, const struct nlattr *attr) 794 { 795 struct nlattr **tb; 796 int ret = 0; 797 798 tb = kcalloc(l4proto->ctnl_timeout.nlattr_max + 1, sizeof(*tb), 799 GFP_KERNEL); 800 801 if (!tb) 802 return -ENOMEM; 803 804 ret = nla_parse_nested_deprecated(tb, 805 l4proto->ctnl_timeout.nlattr_max, 806 attr, 807 l4proto->ctnl_timeout.nla_policy, 808 NULL); 809 if (ret < 0) 810 goto err; 811 812 ret = l4proto->ctnl_timeout.nlattr_to_obj(tb, net, timeouts); 813 814 err: 815 kfree(tb); 816 return ret; 817 } 818 819 struct nft_ct_timeout_obj { 820 struct nf_ct_timeout *timeout; 821 u8 l4proto; 822 }; 823 824 static void nft_ct_timeout_obj_eval(struct nft_object *obj, 825 struct nft_regs *regs, 826 const struct nft_pktinfo *pkt) 827 { 828 const struct nft_ct_timeout_obj *priv = nft_obj_data(obj); 829 struct nf_conn *ct = (struct nf_conn *)skb_nfct(pkt->skb); 830 struct nf_conn_timeout *timeout; 831 const unsigned int *values; 832 833 if (priv->l4proto != pkt->tprot) 834 return; 835 836 if (!ct || nf_ct_is_template(ct) || nf_ct_is_confirmed(ct)) 837 return; 838 839 timeout = nf_ct_timeout_find(ct); 840 if (!timeout) { 841 timeout = nf_ct_timeout_ext_add(ct, priv->timeout, GFP_ATOMIC); 842 if (!timeout) { 843 regs->verdict.code = NF_DROP; 844 return; 845 } 846 } 847 848 rcu_assign_pointer(timeout->timeout, priv->timeout); 849 850 /* adjust the timeout as per 'new' state. ct is unconfirmed, 851 * so the current timestamp must not be added. 852 */ 853 values = nf_ct_timeout_data(timeout); 854 if (values) 855 nf_ct_refresh(ct, pkt->skb, values[0]); 856 } 857 858 static int nft_ct_timeout_obj_init(const struct nft_ctx *ctx, 859 const struct nlattr * const tb[], 860 struct nft_object *obj) 861 { 862 struct nft_ct_timeout_obj *priv = nft_obj_data(obj); 863 const struct nf_conntrack_l4proto *l4proto; 864 struct nf_ct_timeout *timeout; 865 int l3num = ctx->family; 866 __u8 l4num; 867 int ret; 868 869 if (!tb[NFTA_CT_TIMEOUT_L4PROTO] || 870 !tb[NFTA_CT_TIMEOUT_DATA]) 871 return -EINVAL; 872 873 if (tb[NFTA_CT_TIMEOUT_L3PROTO]) 874 l3num = ntohs(nla_get_be16(tb[NFTA_CT_TIMEOUT_L3PROTO])); 875 876 l4num = nla_get_u8(tb[NFTA_CT_TIMEOUT_L4PROTO]); 877 priv->l4proto = l4num; 878 879 l4proto = nf_ct_l4proto_find(l4num); 880 881 if (l4proto->l4proto != l4num) { 882 ret = -EOPNOTSUPP; 883 goto err_proto_put; 884 } 885 886 timeout = kzalloc(sizeof(struct nf_ct_timeout) + 887 l4proto->ctnl_timeout.obj_size, GFP_KERNEL); 888 if (timeout == NULL) { 889 ret = -ENOMEM; 890 goto err_proto_put; 891 } 892 893 ret = nft_ct_timeout_parse_policy(&timeout->data, l4proto, ctx->net, 894 tb[NFTA_CT_TIMEOUT_DATA]); 895 if (ret < 0) 896 goto err_free_timeout; 897 898 timeout->l3num = l3num; 899 timeout->l4proto = l4proto; 900 901 ret = nf_ct_netns_get(ctx->net, ctx->family); 902 if (ret < 0) 903 goto err_free_timeout; 904 905 priv->timeout = timeout; 906 return 0; 907 908 err_free_timeout: 909 kfree(timeout); 910 err_proto_put: 911 return ret; 912 } 913 914 static void nft_ct_timeout_obj_destroy(const struct nft_ctx *ctx, 915 struct nft_object *obj) 916 { 917 struct nft_ct_timeout_obj *priv = nft_obj_data(obj); 918 struct nf_ct_timeout *timeout = priv->timeout; 919 920 nf_ct_untimeout(ctx->net, timeout); 921 nf_ct_netns_put(ctx->net, ctx->family); 922 kfree(priv->timeout); 923 } 924 925 static int nft_ct_timeout_obj_dump(struct sk_buff *skb, 926 struct nft_object *obj, bool reset) 927 { 928 const struct nft_ct_timeout_obj *priv = nft_obj_data(obj); 929 const struct nf_ct_timeout *timeout = priv->timeout; 930 struct nlattr *nest_params; 931 int ret; 932 933 if (nla_put_u8(skb, NFTA_CT_TIMEOUT_L4PROTO, timeout->l4proto->l4proto) || 934 nla_put_be16(skb, NFTA_CT_TIMEOUT_L3PROTO, htons(timeout->l3num))) 935 return -1; 936 937 nest_params = nla_nest_start(skb, NFTA_CT_TIMEOUT_DATA); 938 if (!nest_params) 939 return -1; 940 941 ret = timeout->l4proto->ctnl_timeout.obj_to_nlattr(skb, &timeout->data); 942 if (ret < 0) 943 return -1; 944 nla_nest_end(skb, nest_params); 945 return 0; 946 } 947 948 static const struct nla_policy nft_ct_timeout_policy[NFTA_CT_TIMEOUT_MAX + 1] = { 949 [NFTA_CT_TIMEOUT_L3PROTO] = {.type = NLA_U16 }, 950 [NFTA_CT_TIMEOUT_L4PROTO] = {.type = NLA_U8 }, 951 [NFTA_CT_TIMEOUT_DATA] = {.type = NLA_NESTED }, 952 }; 953 954 static struct nft_object_type nft_ct_timeout_obj_type; 955 956 static const struct nft_object_ops nft_ct_timeout_obj_ops = { 957 .type = &nft_ct_timeout_obj_type, 958 .size = sizeof(struct nft_ct_timeout_obj), 959 .eval = nft_ct_timeout_obj_eval, 960 .init = nft_ct_timeout_obj_init, 961 .destroy = nft_ct_timeout_obj_destroy, 962 .dump = nft_ct_timeout_obj_dump, 963 }; 964 965 static struct nft_object_type nft_ct_timeout_obj_type __read_mostly = { 966 .type = NFT_OBJECT_CT_TIMEOUT, 967 .ops = &nft_ct_timeout_obj_ops, 968 .maxattr = NFTA_CT_TIMEOUT_MAX, 969 .policy = nft_ct_timeout_policy, 970 .owner = THIS_MODULE, 971 }; 972 #endif /* CONFIG_NF_CONNTRACK_TIMEOUT */ 973 974 static int nft_ct_helper_obj_init(const struct nft_ctx *ctx, 975 const struct nlattr * const tb[], 976 struct nft_object *obj) 977 { 978 struct nft_ct_helper_obj *priv = nft_obj_data(obj); 979 struct nf_conntrack_helper *help4, *help6; 980 char name[NF_CT_HELPER_NAME_LEN]; 981 int family = ctx->family; 982 int err; 983 984 if (!tb[NFTA_CT_HELPER_NAME] || !tb[NFTA_CT_HELPER_L4PROTO]) 985 return -EINVAL; 986 987 priv->l4proto = nla_get_u8(tb[NFTA_CT_HELPER_L4PROTO]); 988 if (!priv->l4proto) 989 return -ENOENT; 990 991 nla_strscpy(name, tb[NFTA_CT_HELPER_NAME], sizeof(name)); 992 993 if (tb[NFTA_CT_HELPER_L3PROTO]) 994 family = ntohs(nla_get_be16(tb[NFTA_CT_HELPER_L3PROTO])); 995 996 help4 = NULL; 997 help6 = NULL; 998 999 switch (family) { 1000 case NFPROTO_IPV4: 1001 if (ctx->family == NFPROTO_IPV6) 1002 return -EINVAL; 1003 1004 help4 = nf_conntrack_helper_try_module_get(name, family, 1005 priv->l4proto); 1006 break; 1007 case NFPROTO_IPV6: 1008 if (ctx->family == NFPROTO_IPV4) 1009 return -EINVAL; 1010 1011 help6 = nf_conntrack_helper_try_module_get(name, family, 1012 priv->l4proto); 1013 break; 1014 case NFPROTO_NETDEV: 1015 case NFPROTO_BRIDGE: 1016 case NFPROTO_INET: 1017 help4 = nf_conntrack_helper_try_module_get(name, NFPROTO_IPV4, 1018 priv->l4proto); 1019 help6 = nf_conntrack_helper_try_module_get(name, NFPROTO_IPV6, 1020 priv->l4proto); 1021 break; 1022 default: 1023 return -EAFNOSUPPORT; 1024 } 1025 1026 /* && is intentional; only error if INET found neither ipv4 or ipv6 */ 1027 if (!help4 && !help6) 1028 return -ENOENT; 1029 1030 priv->helper4 = help4; 1031 priv->helper6 = help6; 1032 1033 err = nf_ct_netns_get(ctx->net, ctx->family); 1034 if (err < 0) 1035 goto err_put_helper; 1036 1037 return 0; 1038 1039 err_put_helper: 1040 if (priv->helper4) 1041 nf_conntrack_helper_put(priv->helper4); 1042 if (priv->helper6) 1043 nf_conntrack_helper_put(priv->helper6); 1044 return err; 1045 } 1046 1047 static void nft_ct_helper_obj_destroy(const struct nft_ctx *ctx, 1048 struct nft_object *obj) 1049 { 1050 struct nft_ct_helper_obj *priv = nft_obj_data(obj); 1051 1052 if (priv->helper4) 1053 nf_conntrack_helper_put(priv->helper4); 1054 if (priv->helper6) 1055 nf_conntrack_helper_put(priv->helper6); 1056 1057 nf_ct_netns_put(ctx->net, ctx->family); 1058 } 1059 1060 static void nft_ct_helper_obj_eval(struct nft_object *obj, 1061 struct nft_regs *regs, 1062 const struct nft_pktinfo *pkt) 1063 { 1064 const struct nft_ct_helper_obj *priv = nft_obj_data(obj); 1065 struct nf_conn *ct = (struct nf_conn *)skb_nfct(pkt->skb); 1066 struct nf_conntrack_helper *to_assign = NULL; 1067 struct nf_conn_help *help; 1068 1069 if (!ct || 1070 nf_ct_is_confirmed(ct) || 1071 nf_ct_is_template(ct) || 1072 priv->l4proto != nf_ct_protonum(ct)) 1073 return; 1074 1075 switch (nf_ct_l3num(ct)) { 1076 case NFPROTO_IPV4: 1077 to_assign = priv->helper4; 1078 break; 1079 case NFPROTO_IPV6: 1080 to_assign = priv->helper6; 1081 break; 1082 default: 1083 WARN_ON_ONCE(1); 1084 return; 1085 } 1086 1087 if (!to_assign) 1088 return; 1089 1090 if (test_bit(IPS_HELPER_BIT, &ct->status)) 1091 return; 1092 1093 help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); 1094 if (help) { 1095 rcu_assign_pointer(help->helper, to_assign); 1096 set_bit(IPS_HELPER_BIT, &ct->status); 1097 } 1098 } 1099 1100 static int nft_ct_helper_obj_dump(struct sk_buff *skb, 1101 struct nft_object *obj, bool reset) 1102 { 1103 const struct nft_ct_helper_obj *priv = nft_obj_data(obj); 1104 const struct nf_conntrack_helper *helper; 1105 u16 family; 1106 1107 if (priv->helper4 && priv->helper6) { 1108 family = NFPROTO_INET; 1109 helper = priv->helper4; 1110 } else if (priv->helper6) { 1111 family = NFPROTO_IPV6; 1112 helper = priv->helper6; 1113 } else { 1114 family = NFPROTO_IPV4; 1115 helper = priv->helper4; 1116 } 1117 1118 if (nla_put_string(skb, NFTA_CT_HELPER_NAME, helper->name)) 1119 return -1; 1120 1121 if (nla_put_u8(skb, NFTA_CT_HELPER_L4PROTO, priv->l4proto)) 1122 return -1; 1123 1124 if (nla_put_be16(skb, NFTA_CT_HELPER_L3PROTO, htons(family))) 1125 return -1; 1126 1127 return 0; 1128 } 1129 1130 static const struct nla_policy nft_ct_helper_policy[NFTA_CT_HELPER_MAX + 1] = { 1131 [NFTA_CT_HELPER_NAME] = { .type = NLA_STRING, 1132 .len = NF_CT_HELPER_NAME_LEN - 1 }, 1133 [NFTA_CT_HELPER_L3PROTO] = { .type = NLA_U16 }, 1134 [NFTA_CT_HELPER_L4PROTO] = { .type = NLA_U8 }, 1135 }; 1136 1137 static struct nft_object_type nft_ct_helper_obj_type; 1138 static const struct nft_object_ops nft_ct_helper_obj_ops = { 1139 .type = &nft_ct_helper_obj_type, 1140 .size = sizeof(struct nft_ct_helper_obj), 1141 .eval = nft_ct_helper_obj_eval, 1142 .init = nft_ct_helper_obj_init, 1143 .destroy = nft_ct_helper_obj_destroy, 1144 .dump = nft_ct_helper_obj_dump, 1145 }; 1146 1147 static struct nft_object_type nft_ct_helper_obj_type __read_mostly = { 1148 .type = NFT_OBJECT_CT_HELPER, 1149 .ops = &nft_ct_helper_obj_ops, 1150 .maxattr = NFTA_CT_HELPER_MAX, 1151 .policy = nft_ct_helper_policy, 1152 .owner = THIS_MODULE, 1153 }; 1154 1155 struct nft_ct_expect_obj { 1156 u16 l3num; 1157 __be16 dport; 1158 u8 l4proto; 1159 u8 size; 1160 u32 timeout; 1161 }; 1162 1163 static int nft_ct_expect_obj_init(const struct nft_ctx *ctx, 1164 const struct nlattr * const tb[], 1165 struct nft_object *obj) 1166 { 1167 struct nft_ct_expect_obj *priv = nft_obj_data(obj); 1168 1169 if (!tb[NFTA_CT_EXPECT_L4PROTO] || 1170 !tb[NFTA_CT_EXPECT_DPORT] || 1171 !tb[NFTA_CT_EXPECT_TIMEOUT] || 1172 !tb[NFTA_CT_EXPECT_SIZE]) 1173 return -EINVAL; 1174 1175 priv->l3num = ctx->family; 1176 if (tb[NFTA_CT_EXPECT_L3PROTO]) 1177 priv->l3num = ntohs(nla_get_be16(tb[NFTA_CT_EXPECT_L3PROTO])); 1178 1179 priv->l4proto = nla_get_u8(tb[NFTA_CT_EXPECT_L4PROTO]); 1180 priv->dport = nla_get_be16(tb[NFTA_CT_EXPECT_DPORT]); 1181 priv->timeout = nla_get_u32(tb[NFTA_CT_EXPECT_TIMEOUT]); 1182 priv->size = nla_get_u8(tb[NFTA_CT_EXPECT_SIZE]); 1183 1184 return nf_ct_netns_get(ctx->net, ctx->family); 1185 } 1186 1187 static void nft_ct_expect_obj_destroy(const struct nft_ctx *ctx, 1188 struct nft_object *obj) 1189 { 1190 nf_ct_netns_put(ctx->net, ctx->family); 1191 } 1192 1193 static int nft_ct_expect_obj_dump(struct sk_buff *skb, 1194 struct nft_object *obj, bool reset) 1195 { 1196 const struct nft_ct_expect_obj *priv = nft_obj_data(obj); 1197 1198 if (nla_put_be16(skb, NFTA_CT_EXPECT_L3PROTO, htons(priv->l3num)) || 1199 nla_put_u8(skb, NFTA_CT_EXPECT_L4PROTO, priv->l4proto) || 1200 nla_put_be16(skb, NFTA_CT_EXPECT_DPORT, priv->dport) || 1201 nla_put_u32(skb, NFTA_CT_EXPECT_TIMEOUT, priv->timeout) || 1202 nla_put_u8(skb, NFTA_CT_EXPECT_SIZE, priv->size)) 1203 return -1; 1204 1205 return 0; 1206 } 1207 1208 static void nft_ct_expect_obj_eval(struct nft_object *obj, 1209 struct nft_regs *regs, 1210 const struct nft_pktinfo *pkt) 1211 { 1212 const struct nft_ct_expect_obj *priv = nft_obj_data(obj); 1213 struct nf_conntrack_expect *exp; 1214 enum ip_conntrack_info ctinfo; 1215 struct nf_conn_help *help; 1216 enum ip_conntrack_dir dir; 1217 u16 l3num = priv->l3num; 1218 struct nf_conn *ct; 1219 1220 ct = nf_ct_get(pkt->skb, &ctinfo); 1221 if (!ct || ctinfo == IP_CT_UNTRACKED) { 1222 regs->verdict.code = NFT_BREAK; 1223 return; 1224 } 1225 dir = CTINFO2DIR(ctinfo); 1226 1227 help = nfct_help(ct); 1228 if (!help) 1229 help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); 1230 if (!help) { 1231 regs->verdict.code = NF_DROP; 1232 return; 1233 } 1234 1235 if (help->expecting[NF_CT_EXPECT_CLASS_DEFAULT] >= priv->size) { 1236 regs->verdict.code = NFT_BREAK; 1237 return; 1238 } 1239 if (l3num == NFPROTO_INET) 1240 l3num = nf_ct_l3num(ct); 1241 1242 exp = nf_ct_expect_alloc(ct); 1243 if (exp == NULL) { 1244 regs->verdict.code = NF_DROP; 1245 return; 1246 } 1247 nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, l3num, 1248 &ct->tuplehash[!dir].tuple.src.u3, 1249 &ct->tuplehash[!dir].tuple.dst.u3, 1250 priv->l4proto, NULL, &priv->dport); 1251 exp->timeout.expires = jiffies + priv->timeout * HZ; 1252 1253 if (nf_ct_expect_related(exp, 0) != 0) 1254 regs->verdict.code = NF_DROP; 1255 } 1256 1257 static const struct nla_policy nft_ct_expect_policy[NFTA_CT_EXPECT_MAX + 1] = { 1258 [NFTA_CT_EXPECT_L3PROTO] = { .type = NLA_U16 }, 1259 [NFTA_CT_EXPECT_L4PROTO] = { .type = NLA_U8 }, 1260 [NFTA_CT_EXPECT_DPORT] = { .type = NLA_U16 }, 1261 [NFTA_CT_EXPECT_TIMEOUT] = { .type = NLA_U32 }, 1262 [NFTA_CT_EXPECT_SIZE] = { .type = NLA_U8 }, 1263 }; 1264 1265 static struct nft_object_type nft_ct_expect_obj_type; 1266 1267 static const struct nft_object_ops nft_ct_expect_obj_ops = { 1268 .type = &nft_ct_expect_obj_type, 1269 .size = sizeof(struct nft_ct_expect_obj), 1270 .eval = nft_ct_expect_obj_eval, 1271 .init = nft_ct_expect_obj_init, 1272 .destroy = nft_ct_expect_obj_destroy, 1273 .dump = nft_ct_expect_obj_dump, 1274 }; 1275 1276 static struct nft_object_type nft_ct_expect_obj_type __read_mostly = { 1277 .type = NFT_OBJECT_CT_EXPECT, 1278 .ops = &nft_ct_expect_obj_ops, 1279 .maxattr = NFTA_CT_EXPECT_MAX, 1280 .policy = nft_ct_expect_policy, 1281 .owner = THIS_MODULE, 1282 }; 1283 1284 static int __init nft_ct_module_init(void) 1285 { 1286 int err; 1287 1288 BUILD_BUG_ON(NF_CT_LABELS_MAX_SIZE > NFT_REG_SIZE); 1289 1290 err = nft_register_expr(&nft_ct_type); 1291 if (err < 0) 1292 return err; 1293 1294 err = nft_register_expr(&nft_notrack_type); 1295 if (err < 0) 1296 goto err1; 1297 1298 err = nft_register_obj(&nft_ct_helper_obj_type); 1299 if (err < 0) 1300 goto err2; 1301 1302 err = nft_register_obj(&nft_ct_expect_obj_type); 1303 if (err < 0) 1304 goto err3; 1305 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 1306 err = nft_register_obj(&nft_ct_timeout_obj_type); 1307 if (err < 0) 1308 goto err4; 1309 #endif 1310 return 0; 1311 1312 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 1313 err4: 1314 nft_unregister_obj(&nft_ct_expect_obj_type); 1315 #endif 1316 err3: 1317 nft_unregister_obj(&nft_ct_helper_obj_type); 1318 err2: 1319 nft_unregister_expr(&nft_notrack_type); 1320 err1: 1321 nft_unregister_expr(&nft_ct_type); 1322 return err; 1323 } 1324 1325 static void __exit nft_ct_module_exit(void) 1326 { 1327 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 1328 nft_unregister_obj(&nft_ct_timeout_obj_type); 1329 #endif 1330 nft_unregister_obj(&nft_ct_expect_obj_type); 1331 nft_unregister_obj(&nft_ct_helper_obj_type); 1332 nft_unregister_expr(&nft_notrack_type); 1333 nft_unregister_expr(&nft_ct_type); 1334 } 1335 1336 module_init(nft_ct_module_init); 1337 module_exit(nft_ct_module_exit); 1338 1339 MODULE_LICENSE("GPL"); 1340 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); 1341 MODULE_ALIAS_NFT_EXPR("ct"); 1342 MODULE_ALIAS_NFT_EXPR("notrack"); 1343 MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_HELPER); 1344 MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_TIMEOUT); 1345 MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_EXPECT); 1346 MODULE_DESCRIPTION("Netfilter nf_tables conntrack module"); 1347