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 u8 dreg; 31 u8 sreg; 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 static DEFINE_MUTEX(nft_ct_pcpu_mutex); 45 #endif 46 47 static u64 nft_ct_get_eval_counter(const struct nf_conn_counter *c, 48 enum nft_ct_keys k, 49 enum ip_conntrack_dir d) 50 { 51 if (d < IP_CT_DIR_MAX) 52 return k == NFT_CT_BYTES ? atomic64_read(&c[d].bytes) : 53 atomic64_read(&c[d].packets); 54 55 return nft_ct_get_eval_counter(c, k, IP_CT_DIR_ORIGINAL) + 56 nft_ct_get_eval_counter(c, k, IP_CT_DIR_REPLY); 57 } 58 59 static void nft_ct_get_eval(const struct nft_expr *expr, 60 struct nft_regs *regs, 61 const struct nft_pktinfo *pkt) 62 { 63 const struct nft_ct *priv = nft_expr_priv(expr); 64 u32 *dest = ®s->data[priv->dreg]; 65 enum ip_conntrack_info ctinfo; 66 const struct nf_conn *ct; 67 const struct nf_conn_help *help; 68 const struct nf_conntrack_tuple *tuple; 69 const struct nf_conntrack_helper *helper; 70 unsigned int state; 71 72 ct = nf_ct_get(pkt->skb, &ctinfo); 73 74 switch (priv->key) { 75 case NFT_CT_STATE: 76 if (ct) 77 state = NF_CT_STATE_BIT(ctinfo); 78 else if (ctinfo == IP_CT_UNTRACKED) 79 state = NF_CT_STATE_UNTRACKED_BIT; 80 else 81 state = NF_CT_STATE_INVALID_BIT; 82 *dest = state; 83 return; 84 default: 85 break; 86 } 87 88 if (ct == NULL) 89 goto err; 90 91 switch (priv->key) { 92 case NFT_CT_DIRECTION: 93 nft_reg_store8(dest, CTINFO2DIR(ctinfo)); 94 return; 95 case NFT_CT_STATUS: 96 *dest = ct->status; 97 return; 98 #ifdef CONFIG_NF_CONNTRACK_MARK 99 case NFT_CT_MARK: 100 *dest = ct->mark; 101 return; 102 #endif 103 #ifdef CONFIG_NF_CONNTRACK_SECMARK 104 case NFT_CT_SECMARK: 105 *dest = ct->secmark; 106 return; 107 #endif 108 case NFT_CT_EXPIRATION: 109 *dest = jiffies_to_msecs(nf_ct_expires(ct)); 110 return; 111 case NFT_CT_HELPER: 112 if (ct->master == NULL) 113 goto err; 114 help = nfct_help(ct->master); 115 if (help == NULL) 116 goto err; 117 helper = rcu_dereference(help->helper); 118 if (helper == NULL) 119 goto err; 120 strncpy((char *)dest, helper->name, NF_CT_HELPER_NAME_LEN); 121 return; 122 #ifdef CONFIG_NF_CONNTRACK_LABELS 123 case NFT_CT_LABELS: { 124 struct nf_conn_labels *labels = nf_ct_labels_find(ct); 125 126 if (labels) 127 memcpy(dest, labels->bits, NF_CT_LABELS_MAX_SIZE); 128 else 129 memset(dest, 0, NF_CT_LABELS_MAX_SIZE); 130 return; 131 } 132 #endif 133 case NFT_CT_BYTES: 134 case NFT_CT_PKTS: { 135 const struct nf_conn_acct *acct = nf_conn_acct_find(ct); 136 u64 count = 0; 137 138 if (acct) 139 count = nft_ct_get_eval_counter(acct->counter, 140 priv->key, priv->dir); 141 memcpy(dest, &count, sizeof(count)); 142 return; 143 } 144 case NFT_CT_AVGPKT: { 145 const struct nf_conn_acct *acct = nf_conn_acct_find(ct); 146 u64 avgcnt = 0, bcnt = 0, pcnt = 0; 147 148 if (acct) { 149 pcnt = nft_ct_get_eval_counter(acct->counter, 150 NFT_CT_PKTS, priv->dir); 151 bcnt = nft_ct_get_eval_counter(acct->counter, 152 NFT_CT_BYTES, priv->dir); 153 if (pcnt != 0) 154 avgcnt = div64_u64(bcnt, pcnt); 155 } 156 157 memcpy(dest, &avgcnt, sizeof(avgcnt)); 158 return; 159 } 160 case NFT_CT_L3PROTOCOL: 161 nft_reg_store8(dest, nf_ct_l3num(ct)); 162 return; 163 case NFT_CT_PROTOCOL: 164 nft_reg_store8(dest, nf_ct_protonum(ct)); 165 return; 166 #ifdef CONFIG_NF_CONNTRACK_ZONES 167 case NFT_CT_ZONE: { 168 const struct nf_conntrack_zone *zone = nf_ct_zone(ct); 169 u16 zoneid; 170 171 if (priv->dir < IP_CT_DIR_MAX) 172 zoneid = nf_ct_zone_id(zone, priv->dir); 173 else 174 zoneid = zone->id; 175 176 nft_reg_store16(dest, zoneid); 177 return; 178 } 179 #endif 180 case NFT_CT_ID: 181 *dest = nf_ct_get_id(ct); 182 return; 183 default: 184 break; 185 } 186 187 tuple = &ct->tuplehash[priv->dir].tuple; 188 switch (priv->key) { 189 case NFT_CT_SRC: 190 memcpy(dest, tuple->src.u3.all, 191 nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16); 192 return; 193 case NFT_CT_DST: 194 memcpy(dest, tuple->dst.u3.all, 195 nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16); 196 return; 197 case NFT_CT_PROTO_SRC: 198 nft_reg_store16(dest, (__force u16)tuple->src.u.all); 199 return; 200 case NFT_CT_PROTO_DST: 201 nft_reg_store16(dest, (__force u16)tuple->dst.u.all); 202 return; 203 case NFT_CT_SRC_IP: 204 if (nf_ct_l3num(ct) != NFPROTO_IPV4) 205 goto err; 206 *dest = tuple->src.u3.ip; 207 return; 208 case NFT_CT_DST_IP: 209 if (nf_ct_l3num(ct) != NFPROTO_IPV4) 210 goto err; 211 *dest = tuple->dst.u3.ip; 212 return; 213 case NFT_CT_SRC_IP6: 214 if (nf_ct_l3num(ct) != NFPROTO_IPV6) 215 goto err; 216 memcpy(dest, tuple->src.u3.ip6, sizeof(struct in6_addr)); 217 return; 218 case NFT_CT_DST_IP6: 219 if (nf_ct_l3num(ct) != NFPROTO_IPV6) 220 goto err; 221 memcpy(dest, tuple->dst.u3.ip6, sizeof(struct in6_addr)); 222 return; 223 default: 224 break; 225 } 226 return; 227 err: 228 regs->verdict.code = NFT_BREAK; 229 } 230 231 #ifdef CONFIG_NF_CONNTRACK_ZONES 232 static void nft_ct_set_zone_eval(const struct nft_expr *expr, 233 struct nft_regs *regs, 234 const struct nft_pktinfo *pkt) 235 { 236 struct nf_conntrack_zone zone = { .dir = NF_CT_DEFAULT_ZONE_DIR }; 237 const struct nft_ct *priv = nft_expr_priv(expr); 238 struct sk_buff *skb = pkt->skb; 239 enum ip_conntrack_info ctinfo; 240 u16 value = nft_reg_load16(®s->data[priv->sreg]); 241 struct nf_conn *ct; 242 243 ct = nf_ct_get(skb, &ctinfo); 244 if (ct) /* already tracked */ 245 return; 246 247 zone.id = value; 248 249 switch (priv->dir) { 250 case IP_CT_DIR_ORIGINAL: 251 zone.dir = NF_CT_ZONE_DIR_ORIG; 252 break; 253 case IP_CT_DIR_REPLY: 254 zone.dir = NF_CT_ZONE_DIR_REPL; 255 break; 256 default: 257 break; 258 } 259 260 ct = this_cpu_read(nft_ct_pcpu_template); 261 262 if (likely(refcount_read(&ct->ct_general.use) == 1)) { 263 nf_ct_zone_add(ct, &zone); 264 } else { 265 /* previous skb got queued to userspace */ 266 ct = nf_ct_tmpl_alloc(nft_net(pkt), &zone, GFP_ATOMIC); 267 if (!ct) { 268 regs->verdict.code = NF_DROP; 269 return; 270 } 271 } 272 273 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 per_cpu(nft_ct_pcpu_template, cpu) = tmp; 378 } 379 380 return true; 381 } 382 #endif 383 384 static int nft_ct_get_init(const struct nft_ctx *ctx, 385 const struct nft_expr *expr, 386 const struct nlattr * const tb[]) 387 { 388 struct nft_ct *priv = nft_expr_priv(expr); 389 unsigned int len; 390 int err; 391 392 priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY])); 393 priv->dir = IP_CT_DIR_MAX; 394 switch (priv->key) { 395 case NFT_CT_DIRECTION: 396 if (tb[NFTA_CT_DIRECTION] != NULL) 397 return -EINVAL; 398 len = sizeof(u8); 399 break; 400 case NFT_CT_STATE: 401 case NFT_CT_STATUS: 402 #ifdef CONFIG_NF_CONNTRACK_MARK 403 case NFT_CT_MARK: 404 #endif 405 #ifdef CONFIG_NF_CONNTRACK_SECMARK 406 case NFT_CT_SECMARK: 407 #endif 408 case NFT_CT_EXPIRATION: 409 if (tb[NFTA_CT_DIRECTION] != NULL) 410 return -EINVAL; 411 len = sizeof(u32); 412 break; 413 #ifdef CONFIG_NF_CONNTRACK_LABELS 414 case NFT_CT_LABELS: 415 if (tb[NFTA_CT_DIRECTION] != NULL) 416 return -EINVAL; 417 len = NF_CT_LABELS_MAX_SIZE; 418 break; 419 #endif 420 case NFT_CT_HELPER: 421 if (tb[NFTA_CT_DIRECTION] != NULL) 422 return -EINVAL; 423 len = NF_CT_HELPER_NAME_LEN; 424 break; 425 426 case NFT_CT_L3PROTOCOL: 427 case NFT_CT_PROTOCOL: 428 /* For compatibility, do not report error if NFTA_CT_DIRECTION 429 * attribute is specified. 430 */ 431 len = sizeof(u8); 432 break; 433 case NFT_CT_SRC: 434 case NFT_CT_DST: 435 if (tb[NFTA_CT_DIRECTION] == NULL) 436 return -EINVAL; 437 438 switch (ctx->family) { 439 case NFPROTO_IPV4: 440 len = sizeof_field(struct nf_conntrack_tuple, 441 src.u3.ip); 442 break; 443 case NFPROTO_IPV6: 444 case NFPROTO_INET: 445 len = sizeof_field(struct nf_conntrack_tuple, 446 src.u3.ip6); 447 break; 448 default: 449 return -EAFNOSUPPORT; 450 } 451 break; 452 case NFT_CT_SRC_IP: 453 case NFT_CT_DST_IP: 454 if (tb[NFTA_CT_DIRECTION] == NULL) 455 return -EINVAL; 456 457 len = sizeof_field(struct nf_conntrack_tuple, src.u3.ip); 458 break; 459 case NFT_CT_SRC_IP6: 460 case NFT_CT_DST_IP6: 461 if (tb[NFTA_CT_DIRECTION] == NULL) 462 return -EINVAL; 463 464 len = sizeof_field(struct nf_conntrack_tuple, src.u3.ip6); 465 break; 466 case NFT_CT_PROTO_SRC: 467 case NFT_CT_PROTO_DST: 468 if (tb[NFTA_CT_DIRECTION] == NULL) 469 return -EINVAL; 470 len = sizeof_field(struct nf_conntrack_tuple, src.u.all); 471 break; 472 case NFT_CT_BYTES: 473 case NFT_CT_PKTS: 474 case NFT_CT_AVGPKT: 475 len = sizeof(u64); 476 break; 477 #ifdef CONFIG_NF_CONNTRACK_ZONES 478 case NFT_CT_ZONE: 479 len = sizeof(u16); 480 break; 481 #endif 482 case NFT_CT_ID: 483 len = sizeof(u32); 484 break; 485 default: 486 return -EOPNOTSUPP; 487 } 488 489 if (tb[NFTA_CT_DIRECTION] != NULL) { 490 priv->dir = nla_get_u8(tb[NFTA_CT_DIRECTION]); 491 switch (priv->dir) { 492 case IP_CT_DIR_ORIGINAL: 493 case IP_CT_DIR_REPLY: 494 break; 495 default: 496 return -EINVAL; 497 } 498 } 499 500 err = nft_parse_register_store(ctx, tb[NFTA_CT_DREG], &priv->dreg, NULL, 501 NFT_DATA_VALUE, len); 502 if (err < 0) 503 return err; 504 505 err = nf_ct_netns_get(ctx->net, ctx->family); 506 if (err < 0) 507 return err; 508 509 if (priv->key == NFT_CT_BYTES || 510 priv->key == NFT_CT_PKTS || 511 priv->key == NFT_CT_AVGPKT) 512 nf_ct_set_acct(ctx->net, true); 513 514 return 0; 515 } 516 517 static void __nft_ct_set_destroy(const struct nft_ctx *ctx, struct nft_ct *priv) 518 { 519 switch (priv->key) { 520 #ifdef CONFIG_NF_CONNTRACK_LABELS 521 case NFT_CT_LABELS: 522 nf_connlabels_put(ctx->net); 523 break; 524 #endif 525 #ifdef CONFIG_NF_CONNTRACK_ZONES 526 case NFT_CT_ZONE: 527 mutex_lock(&nft_ct_pcpu_mutex); 528 if (--nft_ct_pcpu_template_refcnt == 0) 529 nft_ct_tmpl_put_pcpu(); 530 mutex_unlock(&nft_ct_pcpu_mutex); 531 break; 532 #endif 533 default: 534 break; 535 } 536 } 537 538 static int nft_ct_set_init(const struct nft_ctx *ctx, 539 const struct nft_expr *expr, 540 const struct nlattr * const tb[]) 541 { 542 struct nft_ct *priv = nft_expr_priv(expr); 543 unsigned int len; 544 int err; 545 546 priv->dir = IP_CT_DIR_MAX; 547 priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY])); 548 switch (priv->key) { 549 #ifdef CONFIG_NF_CONNTRACK_MARK 550 case NFT_CT_MARK: 551 if (tb[NFTA_CT_DIRECTION]) 552 return -EINVAL; 553 len = sizeof_field(struct nf_conn, mark); 554 break; 555 #endif 556 #ifdef CONFIG_NF_CONNTRACK_LABELS 557 case NFT_CT_LABELS: 558 if (tb[NFTA_CT_DIRECTION]) 559 return -EINVAL; 560 len = NF_CT_LABELS_MAX_SIZE; 561 err = nf_connlabels_get(ctx->net, (len * BITS_PER_BYTE) - 1); 562 if (err) 563 return err; 564 break; 565 #endif 566 #ifdef CONFIG_NF_CONNTRACK_ZONES 567 case NFT_CT_ZONE: 568 mutex_lock(&nft_ct_pcpu_mutex); 569 if (!nft_ct_tmpl_alloc_pcpu()) { 570 mutex_unlock(&nft_ct_pcpu_mutex); 571 return -ENOMEM; 572 } 573 nft_ct_pcpu_template_refcnt++; 574 mutex_unlock(&nft_ct_pcpu_mutex); 575 len = sizeof(u16); 576 break; 577 #endif 578 #ifdef CONFIG_NF_CONNTRACK_EVENTS 579 case NFT_CT_EVENTMASK: 580 if (tb[NFTA_CT_DIRECTION]) 581 return -EINVAL; 582 len = sizeof(u32); 583 break; 584 #endif 585 #ifdef CONFIG_NF_CONNTRACK_SECMARK 586 case NFT_CT_SECMARK: 587 if (tb[NFTA_CT_DIRECTION]) 588 return -EINVAL; 589 len = sizeof(u32); 590 break; 591 #endif 592 default: 593 return -EOPNOTSUPP; 594 } 595 596 if (tb[NFTA_CT_DIRECTION]) { 597 priv->dir = nla_get_u8(tb[NFTA_CT_DIRECTION]); 598 switch (priv->dir) { 599 case IP_CT_DIR_ORIGINAL: 600 case IP_CT_DIR_REPLY: 601 break; 602 default: 603 err = -EINVAL; 604 goto err1; 605 } 606 } 607 608 err = nft_parse_register_load(tb[NFTA_CT_SREG], &priv->sreg, len); 609 if (err < 0) 610 goto err1; 611 612 err = nf_ct_netns_get(ctx->net, ctx->family); 613 if (err < 0) 614 goto err1; 615 616 return 0; 617 618 err1: 619 __nft_ct_set_destroy(ctx, priv); 620 return err; 621 } 622 623 static void nft_ct_get_destroy(const struct nft_ctx *ctx, 624 const struct nft_expr *expr) 625 { 626 nf_ct_netns_put(ctx->net, ctx->family); 627 } 628 629 static void nft_ct_set_destroy(const struct nft_ctx *ctx, 630 const struct nft_expr *expr) 631 { 632 struct nft_ct *priv = nft_expr_priv(expr); 633 634 __nft_ct_set_destroy(ctx, priv); 635 nf_ct_netns_put(ctx->net, ctx->family); 636 } 637 638 static int nft_ct_get_dump(struct sk_buff *skb, const struct nft_expr *expr) 639 { 640 const struct nft_ct *priv = nft_expr_priv(expr); 641 642 if (nft_dump_register(skb, NFTA_CT_DREG, priv->dreg)) 643 goto nla_put_failure; 644 if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key))) 645 goto nla_put_failure; 646 647 switch (priv->key) { 648 case NFT_CT_SRC: 649 case NFT_CT_DST: 650 case NFT_CT_SRC_IP: 651 case NFT_CT_DST_IP: 652 case NFT_CT_SRC_IP6: 653 case NFT_CT_DST_IP6: 654 case NFT_CT_PROTO_SRC: 655 case NFT_CT_PROTO_DST: 656 if (nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir)) 657 goto nla_put_failure; 658 break; 659 case NFT_CT_BYTES: 660 case NFT_CT_PKTS: 661 case NFT_CT_AVGPKT: 662 case NFT_CT_ZONE: 663 if (priv->dir < IP_CT_DIR_MAX && 664 nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir)) 665 goto nla_put_failure; 666 break; 667 default: 668 break; 669 } 670 671 return 0; 672 673 nla_put_failure: 674 return -1; 675 } 676 677 static int nft_ct_set_dump(struct sk_buff *skb, const struct nft_expr *expr) 678 { 679 const struct nft_ct *priv = nft_expr_priv(expr); 680 681 if (nft_dump_register(skb, NFTA_CT_SREG, priv->sreg)) 682 goto nla_put_failure; 683 if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key))) 684 goto nla_put_failure; 685 686 switch (priv->key) { 687 case NFT_CT_ZONE: 688 if (priv->dir < IP_CT_DIR_MAX && 689 nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir)) 690 goto nla_put_failure; 691 break; 692 default: 693 break; 694 } 695 696 return 0; 697 698 nla_put_failure: 699 return -1; 700 } 701 702 static struct nft_expr_type nft_ct_type; 703 static const struct nft_expr_ops nft_ct_get_ops = { 704 .type = &nft_ct_type, 705 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)), 706 .eval = nft_ct_get_eval, 707 .init = nft_ct_get_init, 708 .destroy = nft_ct_get_destroy, 709 .dump = nft_ct_get_dump, 710 }; 711 712 static const struct nft_expr_ops nft_ct_set_ops = { 713 .type = &nft_ct_type, 714 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)), 715 .eval = nft_ct_set_eval, 716 .init = nft_ct_set_init, 717 .destroy = nft_ct_set_destroy, 718 .dump = nft_ct_set_dump, 719 }; 720 721 #ifdef CONFIG_NF_CONNTRACK_ZONES 722 static const struct nft_expr_ops nft_ct_set_zone_ops = { 723 .type = &nft_ct_type, 724 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)), 725 .eval = nft_ct_set_zone_eval, 726 .init = nft_ct_set_init, 727 .destroy = nft_ct_set_destroy, 728 .dump = nft_ct_set_dump, 729 }; 730 #endif 731 732 static const struct nft_expr_ops * 733 nft_ct_select_ops(const struct nft_ctx *ctx, 734 const struct nlattr * const tb[]) 735 { 736 if (tb[NFTA_CT_KEY] == NULL) 737 return ERR_PTR(-EINVAL); 738 739 if (tb[NFTA_CT_DREG] && tb[NFTA_CT_SREG]) 740 return ERR_PTR(-EINVAL); 741 742 if (tb[NFTA_CT_DREG]) 743 return &nft_ct_get_ops; 744 745 if (tb[NFTA_CT_SREG]) { 746 #ifdef CONFIG_NF_CONNTRACK_ZONES 747 if (nla_get_be32(tb[NFTA_CT_KEY]) == htonl(NFT_CT_ZONE)) 748 return &nft_ct_set_zone_ops; 749 #endif 750 return &nft_ct_set_ops; 751 } 752 753 return ERR_PTR(-EINVAL); 754 } 755 756 static struct nft_expr_type nft_ct_type __read_mostly = { 757 .name = "ct", 758 .select_ops = nft_ct_select_ops, 759 .policy = nft_ct_policy, 760 .maxattr = NFTA_CT_MAX, 761 .owner = THIS_MODULE, 762 }; 763 764 static void nft_notrack_eval(const struct nft_expr *expr, 765 struct nft_regs *regs, 766 const struct nft_pktinfo *pkt) 767 { 768 struct sk_buff *skb = pkt->skb; 769 enum ip_conntrack_info ctinfo; 770 struct nf_conn *ct; 771 772 ct = nf_ct_get(pkt->skb, &ctinfo); 773 /* Previously seen (loopback or untracked)? Ignore. */ 774 if (ct || ctinfo == IP_CT_UNTRACKED) 775 return; 776 777 nf_ct_set(skb, ct, IP_CT_UNTRACKED); 778 } 779 780 static struct nft_expr_type nft_notrack_type; 781 static const struct nft_expr_ops nft_notrack_ops = { 782 .type = &nft_notrack_type, 783 .size = NFT_EXPR_SIZE(0), 784 .eval = nft_notrack_eval, 785 }; 786 787 static struct nft_expr_type nft_notrack_type __read_mostly = { 788 .name = "notrack", 789 .ops = &nft_notrack_ops, 790 .owner = THIS_MODULE, 791 }; 792 793 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 794 static int 795 nft_ct_timeout_parse_policy(void *timeouts, 796 const struct nf_conntrack_l4proto *l4proto, 797 struct net *net, const struct nlattr *attr) 798 { 799 struct nlattr **tb; 800 int ret = 0; 801 802 tb = kcalloc(l4proto->ctnl_timeout.nlattr_max + 1, sizeof(*tb), 803 GFP_KERNEL); 804 805 if (!tb) 806 return -ENOMEM; 807 808 ret = nla_parse_nested_deprecated(tb, 809 l4proto->ctnl_timeout.nlattr_max, 810 attr, 811 l4proto->ctnl_timeout.nla_policy, 812 NULL); 813 if (ret < 0) 814 goto err; 815 816 ret = l4proto->ctnl_timeout.nlattr_to_obj(tb, net, timeouts); 817 818 err: 819 kfree(tb); 820 return ret; 821 } 822 823 struct nft_ct_timeout_obj { 824 struct nf_ct_timeout *timeout; 825 u8 l4proto; 826 }; 827 828 static void nft_ct_timeout_obj_eval(struct nft_object *obj, 829 struct nft_regs *regs, 830 const struct nft_pktinfo *pkt) 831 { 832 const struct nft_ct_timeout_obj *priv = nft_obj_data(obj); 833 struct nf_conn *ct = (struct nf_conn *)skb_nfct(pkt->skb); 834 struct nf_conn_timeout *timeout; 835 const unsigned int *values; 836 837 if (priv->l4proto != pkt->tprot) 838 return; 839 840 if (!ct || nf_ct_is_template(ct) || nf_ct_is_confirmed(ct)) 841 return; 842 843 timeout = nf_ct_timeout_find(ct); 844 if (!timeout) { 845 timeout = nf_ct_timeout_ext_add(ct, priv->timeout, GFP_ATOMIC); 846 if (!timeout) { 847 regs->verdict.code = NF_DROP; 848 return; 849 } 850 } 851 852 rcu_assign_pointer(timeout->timeout, priv->timeout); 853 854 /* adjust the timeout as per 'new' state. ct is unconfirmed, 855 * so the current timestamp must not be added. 856 */ 857 values = nf_ct_timeout_data(timeout); 858 if (values) 859 nf_ct_refresh(ct, pkt->skb, values[0]); 860 } 861 862 static int nft_ct_timeout_obj_init(const struct nft_ctx *ctx, 863 const struct nlattr * const tb[], 864 struct nft_object *obj) 865 { 866 struct nft_ct_timeout_obj *priv = nft_obj_data(obj); 867 const struct nf_conntrack_l4proto *l4proto; 868 struct nf_ct_timeout *timeout; 869 int l3num = ctx->family; 870 __u8 l4num; 871 int ret; 872 873 if (!tb[NFTA_CT_TIMEOUT_L4PROTO] || 874 !tb[NFTA_CT_TIMEOUT_DATA]) 875 return -EINVAL; 876 877 if (tb[NFTA_CT_TIMEOUT_L3PROTO]) 878 l3num = ntohs(nla_get_be16(tb[NFTA_CT_TIMEOUT_L3PROTO])); 879 880 l4num = nla_get_u8(tb[NFTA_CT_TIMEOUT_L4PROTO]); 881 priv->l4proto = l4num; 882 883 l4proto = nf_ct_l4proto_find(l4num); 884 885 if (l4proto->l4proto != l4num) { 886 ret = -EOPNOTSUPP; 887 goto err_proto_put; 888 } 889 890 timeout = kzalloc(sizeof(struct nf_ct_timeout) + 891 l4proto->ctnl_timeout.obj_size, GFP_KERNEL); 892 if (timeout == NULL) { 893 ret = -ENOMEM; 894 goto err_proto_put; 895 } 896 897 ret = nft_ct_timeout_parse_policy(&timeout->data, l4proto, ctx->net, 898 tb[NFTA_CT_TIMEOUT_DATA]); 899 if (ret < 0) 900 goto err_free_timeout; 901 902 timeout->l3num = l3num; 903 timeout->l4proto = l4proto; 904 905 ret = nf_ct_netns_get(ctx->net, ctx->family); 906 if (ret < 0) 907 goto err_free_timeout; 908 909 priv->timeout = timeout; 910 return 0; 911 912 err_free_timeout: 913 kfree(timeout); 914 err_proto_put: 915 return ret; 916 } 917 918 static void nft_ct_timeout_obj_destroy(const struct nft_ctx *ctx, 919 struct nft_object *obj) 920 { 921 struct nft_ct_timeout_obj *priv = nft_obj_data(obj); 922 struct nf_ct_timeout *timeout = priv->timeout; 923 924 nf_ct_untimeout(ctx->net, timeout); 925 nf_ct_netns_put(ctx->net, ctx->family); 926 kfree(priv->timeout); 927 } 928 929 static int nft_ct_timeout_obj_dump(struct sk_buff *skb, 930 struct nft_object *obj, bool reset) 931 { 932 const struct nft_ct_timeout_obj *priv = nft_obj_data(obj); 933 const struct nf_ct_timeout *timeout = priv->timeout; 934 struct nlattr *nest_params; 935 int ret; 936 937 if (nla_put_u8(skb, NFTA_CT_TIMEOUT_L4PROTO, timeout->l4proto->l4proto) || 938 nla_put_be16(skb, NFTA_CT_TIMEOUT_L3PROTO, htons(timeout->l3num))) 939 return -1; 940 941 nest_params = nla_nest_start(skb, NFTA_CT_TIMEOUT_DATA); 942 if (!nest_params) 943 return -1; 944 945 ret = timeout->l4proto->ctnl_timeout.obj_to_nlattr(skb, &timeout->data); 946 if (ret < 0) 947 return -1; 948 nla_nest_end(skb, nest_params); 949 return 0; 950 } 951 952 static const struct nla_policy nft_ct_timeout_policy[NFTA_CT_TIMEOUT_MAX + 1] = { 953 [NFTA_CT_TIMEOUT_L3PROTO] = {.type = NLA_U16 }, 954 [NFTA_CT_TIMEOUT_L4PROTO] = {.type = NLA_U8 }, 955 [NFTA_CT_TIMEOUT_DATA] = {.type = NLA_NESTED }, 956 }; 957 958 static struct nft_object_type nft_ct_timeout_obj_type; 959 960 static const struct nft_object_ops nft_ct_timeout_obj_ops = { 961 .type = &nft_ct_timeout_obj_type, 962 .size = sizeof(struct nft_ct_timeout_obj), 963 .eval = nft_ct_timeout_obj_eval, 964 .init = nft_ct_timeout_obj_init, 965 .destroy = nft_ct_timeout_obj_destroy, 966 .dump = nft_ct_timeout_obj_dump, 967 }; 968 969 static struct nft_object_type nft_ct_timeout_obj_type __read_mostly = { 970 .type = NFT_OBJECT_CT_TIMEOUT, 971 .ops = &nft_ct_timeout_obj_ops, 972 .maxattr = NFTA_CT_TIMEOUT_MAX, 973 .policy = nft_ct_timeout_policy, 974 .owner = THIS_MODULE, 975 }; 976 #endif /* CONFIG_NF_CONNTRACK_TIMEOUT */ 977 978 static int nft_ct_helper_obj_init(const struct nft_ctx *ctx, 979 const struct nlattr * const tb[], 980 struct nft_object *obj) 981 { 982 struct nft_ct_helper_obj *priv = nft_obj_data(obj); 983 struct nf_conntrack_helper *help4, *help6; 984 char name[NF_CT_HELPER_NAME_LEN]; 985 int family = ctx->family; 986 int err; 987 988 if (!tb[NFTA_CT_HELPER_NAME] || !tb[NFTA_CT_HELPER_L4PROTO]) 989 return -EINVAL; 990 991 priv->l4proto = nla_get_u8(tb[NFTA_CT_HELPER_L4PROTO]); 992 if (!priv->l4proto) 993 return -ENOENT; 994 995 nla_strscpy(name, tb[NFTA_CT_HELPER_NAME], sizeof(name)); 996 997 if (tb[NFTA_CT_HELPER_L3PROTO]) 998 family = ntohs(nla_get_be16(tb[NFTA_CT_HELPER_L3PROTO])); 999 1000 help4 = NULL; 1001 help6 = NULL; 1002 1003 switch (family) { 1004 case NFPROTO_IPV4: 1005 if (ctx->family == NFPROTO_IPV6) 1006 return -EINVAL; 1007 1008 help4 = nf_conntrack_helper_try_module_get(name, family, 1009 priv->l4proto); 1010 break; 1011 case NFPROTO_IPV6: 1012 if (ctx->family == NFPROTO_IPV4) 1013 return -EINVAL; 1014 1015 help6 = nf_conntrack_helper_try_module_get(name, family, 1016 priv->l4proto); 1017 break; 1018 case NFPROTO_NETDEV: 1019 case NFPROTO_BRIDGE: 1020 case NFPROTO_INET: 1021 help4 = nf_conntrack_helper_try_module_get(name, NFPROTO_IPV4, 1022 priv->l4proto); 1023 help6 = nf_conntrack_helper_try_module_get(name, NFPROTO_IPV6, 1024 priv->l4proto); 1025 break; 1026 default: 1027 return -EAFNOSUPPORT; 1028 } 1029 1030 /* && is intentional; only error if INET found neither ipv4 or ipv6 */ 1031 if (!help4 && !help6) 1032 return -ENOENT; 1033 1034 priv->helper4 = help4; 1035 priv->helper6 = help6; 1036 1037 err = nf_ct_netns_get(ctx->net, ctx->family); 1038 if (err < 0) 1039 goto err_put_helper; 1040 1041 return 0; 1042 1043 err_put_helper: 1044 if (priv->helper4) 1045 nf_conntrack_helper_put(priv->helper4); 1046 if (priv->helper6) 1047 nf_conntrack_helper_put(priv->helper6); 1048 return err; 1049 } 1050 1051 static void nft_ct_helper_obj_destroy(const struct nft_ctx *ctx, 1052 struct nft_object *obj) 1053 { 1054 struct nft_ct_helper_obj *priv = nft_obj_data(obj); 1055 1056 if (priv->helper4) 1057 nf_conntrack_helper_put(priv->helper4); 1058 if (priv->helper6) 1059 nf_conntrack_helper_put(priv->helper6); 1060 1061 nf_ct_netns_put(ctx->net, ctx->family); 1062 } 1063 1064 static void nft_ct_helper_obj_eval(struct nft_object *obj, 1065 struct nft_regs *regs, 1066 const struct nft_pktinfo *pkt) 1067 { 1068 const struct nft_ct_helper_obj *priv = nft_obj_data(obj); 1069 struct nf_conn *ct = (struct nf_conn *)skb_nfct(pkt->skb); 1070 struct nf_conntrack_helper *to_assign = NULL; 1071 struct nf_conn_help *help; 1072 1073 if (!ct || 1074 nf_ct_is_confirmed(ct) || 1075 nf_ct_is_template(ct) || 1076 priv->l4proto != nf_ct_protonum(ct)) 1077 return; 1078 1079 switch (nf_ct_l3num(ct)) { 1080 case NFPROTO_IPV4: 1081 to_assign = priv->helper4; 1082 break; 1083 case NFPROTO_IPV6: 1084 to_assign = priv->helper6; 1085 break; 1086 default: 1087 WARN_ON_ONCE(1); 1088 return; 1089 } 1090 1091 if (!to_assign) 1092 return; 1093 1094 if (test_bit(IPS_HELPER_BIT, &ct->status)) 1095 return; 1096 1097 help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); 1098 if (help) { 1099 rcu_assign_pointer(help->helper, to_assign); 1100 set_bit(IPS_HELPER_BIT, &ct->status); 1101 } 1102 } 1103 1104 static int nft_ct_helper_obj_dump(struct sk_buff *skb, 1105 struct nft_object *obj, bool reset) 1106 { 1107 const struct nft_ct_helper_obj *priv = nft_obj_data(obj); 1108 const struct nf_conntrack_helper *helper; 1109 u16 family; 1110 1111 if (priv->helper4 && priv->helper6) { 1112 family = NFPROTO_INET; 1113 helper = priv->helper4; 1114 } else if (priv->helper6) { 1115 family = NFPROTO_IPV6; 1116 helper = priv->helper6; 1117 } else { 1118 family = NFPROTO_IPV4; 1119 helper = priv->helper4; 1120 } 1121 1122 if (nla_put_string(skb, NFTA_CT_HELPER_NAME, helper->name)) 1123 return -1; 1124 1125 if (nla_put_u8(skb, NFTA_CT_HELPER_L4PROTO, priv->l4proto)) 1126 return -1; 1127 1128 if (nla_put_be16(skb, NFTA_CT_HELPER_L3PROTO, htons(family))) 1129 return -1; 1130 1131 return 0; 1132 } 1133 1134 static const struct nla_policy nft_ct_helper_policy[NFTA_CT_HELPER_MAX + 1] = { 1135 [NFTA_CT_HELPER_NAME] = { .type = NLA_STRING, 1136 .len = NF_CT_HELPER_NAME_LEN - 1 }, 1137 [NFTA_CT_HELPER_L3PROTO] = { .type = NLA_U16 }, 1138 [NFTA_CT_HELPER_L4PROTO] = { .type = NLA_U8 }, 1139 }; 1140 1141 static struct nft_object_type nft_ct_helper_obj_type; 1142 static const struct nft_object_ops nft_ct_helper_obj_ops = { 1143 .type = &nft_ct_helper_obj_type, 1144 .size = sizeof(struct nft_ct_helper_obj), 1145 .eval = nft_ct_helper_obj_eval, 1146 .init = nft_ct_helper_obj_init, 1147 .destroy = nft_ct_helper_obj_destroy, 1148 .dump = nft_ct_helper_obj_dump, 1149 }; 1150 1151 static struct nft_object_type nft_ct_helper_obj_type __read_mostly = { 1152 .type = NFT_OBJECT_CT_HELPER, 1153 .ops = &nft_ct_helper_obj_ops, 1154 .maxattr = NFTA_CT_HELPER_MAX, 1155 .policy = nft_ct_helper_policy, 1156 .owner = THIS_MODULE, 1157 }; 1158 1159 struct nft_ct_expect_obj { 1160 u16 l3num; 1161 __be16 dport; 1162 u8 l4proto; 1163 u8 size; 1164 u32 timeout; 1165 }; 1166 1167 static int nft_ct_expect_obj_init(const struct nft_ctx *ctx, 1168 const struct nlattr * const tb[], 1169 struct nft_object *obj) 1170 { 1171 struct nft_ct_expect_obj *priv = nft_obj_data(obj); 1172 1173 if (!tb[NFTA_CT_EXPECT_L4PROTO] || 1174 !tb[NFTA_CT_EXPECT_DPORT] || 1175 !tb[NFTA_CT_EXPECT_TIMEOUT] || 1176 !tb[NFTA_CT_EXPECT_SIZE]) 1177 return -EINVAL; 1178 1179 priv->l3num = ctx->family; 1180 if (tb[NFTA_CT_EXPECT_L3PROTO]) 1181 priv->l3num = ntohs(nla_get_be16(tb[NFTA_CT_EXPECT_L3PROTO])); 1182 1183 priv->l4proto = nla_get_u8(tb[NFTA_CT_EXPECT_L4PROTO]); 1184 priv->dport = nla_get_be16(tb[NFTA_CT_EXPECT_DPORT]); 1185 priv->timeout = nla_get_u32(tb[NFTA_CT_EXPECT_TIMEOUT]); 1186 priv->size = nla_get_u8(tb[NFTA_CT_EXPECT_SIZE]); 1187 1188 return nf_ct_netns_get(ctx->net, ctx->family); 1189 } 1190 1191 static void nft_ct_expect_obj_destroy(const struct nft_ctx *ctx, 1192 struct nft_object *obj) 1193 { 1194 nf_ct_netns_put(ctx->net, ctx->family); 1195 } 1196 1197 static int nft_ct_expect_obj_dump(struct sk_buff *skb, 1198 struct nft_object *obj, bool reset) 1199 { 1200 const struct nft_ct_expect_obj *priv = nft_obj_data(obj); 1201 1202 if (nla_put_be16(skb, NFTA_CT_EXPECT_L3PROTO, htons(priv->l3num)) || 1203 nla_put_u8(skb, NFTA_CT_EXPECT_L4PROTO, priv->l4proto) || 1204 nla_put_be16(skb, NFTA_CT_EXPECT_DPORT, priv->dport) || 1205 nla_put_u32(skb, NFTA_CT_EXPECT_TIMEOUT, priv->timeout) || 1206 nla_put_u8(skb, NFTA_CT_EXPECT_SIZE, priv->size)) 1207 return -1; 1208 1209 return 0; 1210 } 1211 1212 static void nft_ct_expect_obj_eval(struct nft_object *obj, 1213 struct nft_regs *regs, 1214 const struct nft_pktinfo *pkt) 1215 { 1216 const struct nft_ct_expect_obj *priv = nft_obj_data(obj); 1217 struct nf_conntrack_expect *exp; 1218 enum ip_conntrack_info ctinfo; 1219 struct nf_conn_help *help; 1220 enum ip_conntrack_dir dir; 1221 u16 l3num = priv->l3num; 1222 struct nf_conn *ct; 1223 1224 ct = nf_ct_get(pkt->skb, &ctinfo); 1225 if (!ct || nf_ct_is_confirmed(ct) || nf_ct_is_template(ct)) { 1226 regs->verdict.code = NFT_BREAK; 1227 return; 1228 } 1229 dir = CTINFO2DIR(ctinfo); 1230 1231 help = nfct_help(ct); 1232 if (!help) 1233 help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); 1234 if (!help) { 1235 regs->verdict.code = NF_DROP; 1236 return; 1237 } 1238 1239 if (help->expecting[NF_CT_EXPECT_CLASS_DEFAULT] >= priv->size) { 1240 regs->verdict.code = NFT_BREAK; 1241 return; 1242 } 1243 if (l3num == NFPROTO_INET) 1244 l3num = nf_ct_l3num(ct); 1245 1246 exp = nf_ct_expect_alloc(ct); 1247 if (exp == NULL) { 1248 regs->verdict.code = NF_DROP; 1249 return; 1250 } 1251 nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, l3num, 1252 &ct->tuplehash[!dir].tuple.src.u3, 1253 &ct->tuplehash[!dir].tuple.dst.u3, 1254 priv->l4proto, NULL, &priv->dport); 1255 exp->timeout.expires = jiffies + priv->timeout * HZ; 1256 1257 if (nf_ct_expect_related(exp, 0) != 0) 1258 regs->verdict.code = NF_DROP; 1259 } 1260 1261 static const struct nla_policy nft_ct_expect_policy[NFTA_CT_EXPECT_MAX + 1] = { 1262 [NFTA_CT_EXPECT_L3PROTO] = { .type = NLA_U16 }, 1263 [NFTA_CT_EXPECT_L4PROTO] = { .type = NLA_U8 }, 1264 [NFTA_CT_EXPECT_DPORT] = { .type = NLA_U16 }, 1265 [NFTA_CT_EXPECT_TIMEOUT] = { .type = NLA_U32 }, 1266 [NFTA_CT_EXPECT_SIZE] = { .type = NLA_U8 }, 1267 }; 1268 1269 static struct nft_object_type nft_ct_expect_obj_type; 1270 1271 static const struct nft_object_ops nft_ct_expect_obj_ops = { 1272 .type = &nft_ct_expect_obj_type, 1273 .size = sizeof(struct nft_ct_expect_obj), 1274 .eval = nft_ct_expect_obj_eval, 1275 .init = nft_ct_expect_obj_init, 1276 .destroy = nft_ct_expect_obj_destroy, 1277 .dump = nft_ct_expect_obj_dump, 1278 }; 1279 1280 static struct nft_object_type nft_ct_expect_obj_type __read_mostly = { 1281 .type = NFT_OBJECT_CT_EXPECT, 1282 .ops = &nft_ct_expect_obj_ops, 1283 .maxattr = NFTA_CT_EXPECT_MAX, 1284 .policy = nft_ct_expect_policy, 1285 .owner = THIS_MODULE, 1286 }; 1287 1288 static int __init nft_ct_module_init(void) 1289 { 1290 int err; 1291 1292 BUILD_BUG_ON(NF_CT_LABELS_MAX_SIZE > NFT_REG_SIZE); 1293 1294 err = nft_register_expr(&nft_ct_type); 1295 if (err < 0) 1296 return err; 1297 1298 err = nft_register_expr(&nft_notrack_type); 1299 if (err < 0) 1300 goto err1; 1301 1302 err = nft_register_obj(&nft_ct_helper_obj_type); 1303 if (err < 0) 1304 goto err2; 1305 1306 err = nft_register_obj(&nft_ct_expect_obj_type); 1307 if (err < 0) 1308 goto err3; 1309 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 1310 err = nft_register_obj(&nft_ct_timeout_obj_type); 1311 if (err < 0) 1312 goto err4; 1313 #endif 1314 return 0; 1315 1316 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 1317 err4: 1318 nft_unregister_obj(&nft_ct_expect_obj_type); 1319 #endif 1320 err3: 1321 nft_unregister_obj(&nft_ct_helper_obj_type); 1322 err2: 1323 nft_unregister_expr(&nft_notrack_type); 1324 err1: 1325 nft_unregister_expr(&nft_ct_type); 1326 return err; 1327 } 1328 1329 static void __exit nft_ct_module_exit(void) 1330 { 1331 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 1332 nft_unregister_obj(&nft_ct_timeout_obj_type); 1333 #endif 1334 nft_unregister_obj(&nft_ct_expect_obj_type); 1335 nft_unregister_obj(&nft_ct_helper_obj_type); 1336 nft_unregister_expr(&nft_notrack_type); 1337 nft_unregister_expr(&nft_ct_type); 1338 } 1339 1340 module_init(nft_ct_module_init); 1341 module_exit(nft_ct_module_exit); 1342 1343 MODULE_LICENSE("GPL"); 1344 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); 1345 MODULE_ALIAS_NFT_EXPR("ct"); 1346 MODULE_ALIAS_NFT_EXPR("notrack"); 1347 MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_HELPER); 1348 MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_TIMEOUT); 1349 MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_EXPECT); 1350 MODULE_DESCRIPTION("Netfilter nf_tables conntrack module"); 1351