1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * inet_diag.c Module for monitoring INET transport protocols sockets. 4 * 5 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/module.h> 10 #include <linux/types.h> 11 #include <linux/fcntl.h> 12 #include <linux/random.h> 13 #include <linux/slab.h> 14 #include <linux/cache.h> 15 #include <linux/init.h> 16 #include <linux/time.h> 17 18 #include <net/icmp.h> 19 #include <net/tcp.h> 20 #include <net/ipv6.h> 21 #include <net/inet_common.h> 22 #include <net/inet_connection_sock.h> 23 #include <net/inet_hashtables.h> 24 #include <net/inet_timewait_sock.h> 25 #include <net/inet6_hashtables.h> 26 #include <net/bpf_sk_storage.h> 27 #include <net/netlink.h> 28 29 #include <linux/inet.h> 30 #include <linux/stddef.h> 31 32 #include <linux/inet_diag.h> 33 #include <linux/sock_diag.h> 34 35 static const struct inet_diag_handler **inet_diag_table; 36 37 struct inet_diag_entry { 38 const __be32 *saddr; 39 const __be32 *daddr; 40 u16 sport; 41 u16 dport; 42 u16 family; 43 u16 userlocks; 44 u32 ifindex; 45 u32 mark; 46 }; 47 48 static DEFINE_MUTEX(inet_diag_table_mutex); 49 50 static const struct inet_diag_handler *inet_diag_lock_handler(int proto) 51 { 52 if (!inet_diag_table[proto]) 53 sock_load_diag_module(AF_INET, proto); 54 55 mutex_lock(&inet_diag_table_mutex); 56 if (!inet_diag_table[proto]) 57 return ERR_PTR(-ENOENT); 58 59 return inet_diag_table[proto]; 60 } 61 62 static void inet_diag_unlock_handler(const struct inet_diag_handler *handler) 63 { 64 mutex_unlock(&inet_diag_table_mutex); 65 } 66 67 void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk) 68 { 69 r->idiag_family = sk->sk_family; 70 71 r->id.idiag_sport = htons(sk->sk_num); 72 r->id.idiag_dport = sk->sk_dport; 73 r->id.idiag_if = sk->sk_bound_dev_if; 74 sock_diag_save_cookie(sk, r->id.idiag_cookie); 75 76 #if IS_ENABLED(CONFIG_IPV6) 77 if (sk->sk_family == AF_INET6) { 78 *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr; 79 *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr; 80 } else 81 #endif 82 { 83 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); 84 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); 85 86 r->id.idiag_src[0] = sk->sk_rcv_saddr; 87 r->id.idiag_dst[0] = sk->sk_daddr; 88 } 89 } 90 EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill); 91 92 static size_t inet_sk_attr_size(struct sock *sk, 93 const struct inet_diag_req_v2 *req, 94 bool net_admin) 95 { 96 const struct inet_diag_handler *handler; 97 size_t aux = 0; 98 99 handler = inet_diag_table[req->sdiag_protocol]; 100 if (handler && handler->idiag_get_aux_size) 101 aux = handler->idiag_get_aux_size(sk, net_admin); 102 103 return nla_total_size(sizeof(struct tcp_info)) 104 + nla_total_size(sizeof(struct inet_diag_msg)) 105 + inet_diag_msg_attrs_size() 106 + nla_total_size(sizeof(struct inet_diag_meminfo)) 107 + nla_total_size(SK_MEMINFO_VARS * sizeof(u32)) 108 + nla_total_size(TCP_CA_NAME_MAX) 109 + nla_total_size(sizeof(struct tcpvegas_info)) 110 + aux 111 + 64; 112 } 113 114 int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb, 115 struct inet_diag_msg *r, int ext, 116 struct user_namespace *user_ns, 117 bool net_admin) 118 { 119 const struct inet_sock *inet = inet_sk(sk); 120 121 if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) 122 goto errout; 123 124 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, 125 * hence this needs to be included regardless of socket family. 126 */ 127 if (ext & (1 << (INET_DIAG_TOS - 1))) 128 if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) 129 goto errout; 130 131 #if IS_ENABLED(CONFIG_IPV6) 132 if (r->idiag_family == AF_INET6) { 133 if (ext & (1 << (INET_DIAG_TCLASS - 1))) 134 if (nla_put_u8(skb, INET_DIAG_TCLASS, 135 inet6_sk(sk)->tclass) < 0) 136 goto errout; 137 138 if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && 139 nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk))) 140 goto errout; 141 } 142 #endif 143 144 if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, sk->sk_mark)) 145 goto errout; 146 147 if (ext & (1 << (INET_DIAG_CLASS_ID - 1)) || 148 ext & (1 << (INET_DIAG_TCLASS - 1))) { 149 u32 classid = 0; 150 151 #ifdef CONFIG_SOCK_CGROUP_DATA 152 classid = sock_cgroup_classid(&sk->sk_cgrp_data); 153 #endif 154 /* Fallback to socket priority if class id isn't set. 155 * Classful qdiscs use it as direct reference to class. 156 * For cgroup2 classid is always zero. 157 */ 158 if (!classid) 159 classid = sk->sk_priority; 160 161 if (nla_put_u32(skb, INET_DIAG_CLASS_ID, classid)) 162 goto errout; 163 } 164 165 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); 166 r->idiag_inode = sock_i_ino(sk); 167 168 return 0; 169 errout: 170 return 1; 171 } 172 EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill); 173 174 #define MAX_DUMP_ALLOC_SIZE (KMALLOC_MAX_SIZE - SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) 175 176 int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, 177 struct sk_buff *skb, struct netlink_callback *cb, 178 const struct inet_diag_req_v2 *req, 179 u16 nlmsg_flags, bool net_admin) 180 { 181 const struct tcp_congestion_ops *ca_ops; 182 const struct inet_diag_handler *handler; 183 struct inet_diag_dump_data *cb_data; 184 int ext = req->idiag_ext; 185 struct inet_diag_msg *r; 186 struct nlmsghdr *nlh; 187 struct nlattr *attr; 188 void *info = NULL; 189 190 cb_data = cb->data; 191 handler = inet_diag_table[req->sdiag_protocol]; 192 BUG_ON(!handler); 193 194 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 195 cb->nlh->nlmsg_type, sizeof(*r), nlmsg_flags); 196 if (!nlh) 197 return -EMSGSIZE; 198 199 r = nlmsg_data(nlh); 200 BUG_ON(!sk_fullsock(sk)); 201 202 inet_diag_msg_common_fill(r, sk); 203 r->idiag_state = sk->sk_state; 204 r->idiag_timer = 0; 205 r->idiag_retrans = 0; 206 207 if (inet_diag_msg_attrs_fill(sk, skb, r, ext, 208 sk_user_ns(NETLINK_CB(cb->skb).sk), 209 net_admin)) 210 goto errout; 211 212 if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { 213 struct inet_diag_meminfo minfo = { 214 .idiag_rmem = sk_rmem_alloc_get(sk), 215 .idiag_wmem = READ_ONCE(sk->sk_wmem_queued), 216 .idiag_fmem = sk->sk_forward_alloc, 217 .idiag_tmem = sk_wmem_alloc_get(sk), 218 }; 219 220 if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) 221 goto errout; 222 } 223 224 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) 225 if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) 226 goto errout; 227 228 /* 229 * RAW sockets might have user-defined protocols assigned, 230 * so report the one supplied on socket creation. 231 */ 232 if (sk->sk_type == SOCK_RAW) { 233 if (nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol)) 234 goto errout; 235 } 236 237 if (!icsk) { 238 handler->idiag_get_info(sk, r, NULL); 239 goto out; 240 } 241 242 if (icsk->icsk_pending == ICSK_TIME_RETRANS || 243 icsk->icsk_pending == ICSK_TIME_REO_TIMEOUT || 244 icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { 245 r->idiag_timer = 1; 246 r->idiag_retrans = icsk->icsk_retransmits; 247 r->idiag_expires = 248 jiffies_delta_to_msecs(icsk->icsk_timeout - jiffies); 249 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { 250 r->idiag_timer = 4; 251 r->idiag_retrans = icsk->icsk_probes_out; 252 r->idiag_expires = 253 jiffies_delta_to_msecs(icsk->icsk_timeout - jiffies); 254 } else if (timer_pending(&sk->sk_timer)) { 255 r->idiag_timer = 2; 256 r->idiag_retrans = icsk->icsk_probes_out; 257 r->idiag_expires = 258 jiffies_delta_to_msecs(sk->sk_timer.expires - jiffies); 259 } else { 260 r->idiag_timer = 0; 261 r->idiag_expires = 0; 262 } 263 264 if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) { 265 attr = nla_reserve_64bit(skb, INET_DIAG_INFO, 266 handler->idiag_info_size, 267 INET_DIAG_PAD); 268 if (!attr) 269 goto errout; 270 271 info = nla_data(attr); 272 } 273 274 if (ext & (1 << (INET_DIAG_CONG - 1))) { 275 int err = 0; 276 277 rcu_read_lock(); 278 ca_ops = READ_ONCE(icsk->icsk_ca_ops); 279 if (ca_ops) 280 err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name); 281 rcu_read_unlock(); 282 if (err < 0) 283 goto errout; 284 } 285 286 handler->idiag_get_info(sk, r, info); 287 288 if (ext & (1 << (INET_DIAG_INFO - 1)) && handler->idiag_get_aux) 289 if (handler->idiag_get_aux(sk, net_admin, skb) < 0) 290 goto errout; 291 292 if (sk->sk_state < TCP_TIME_WAIT) { 293 union tcp_cc_info info; 294 size_t sz = 0; 295 int attr; 296 297 rcu_read_lock(); 298 ca_ops = READ_ONCE(icsk->icsk_ca_ops); 299 if (ca_ops && ca_ops->get_info) 300 sz = ca_ops->get_info(sk, ext, &attr, &info); 301 rcu_read_unlock(); 302 if (sz && nla_put(skb, attr, sz, &info) < 0) 303 goto errout; 304 } 305 306 /* Keep it at the end for potential retry with a larger skb, 307 * or else do best-effort fitting, which is only done for the 308 * first_nlmsg. 309 */ 310 if (cb_data->bpf_stg_diag) { 311 bool first_nlmsg = ((unsigned char *)nlh == skb->data); 312 unsigned int prev_min_dump_alloc; 313 unsigned int total_nla_size = 0; 314 unsigned int msg_len; 315 int err; 316 317 msg_len = skb_tail_pointer(skb) - (unsigned char *)nlh; 318 err = bpf_sk_storage_diag_put(cb_data->bpf_stg_diag, sk, skb, 319 INET_DIAG_SK_BPF_STORAGES, 320 &total_nla_size); 321 322 if (!err) 323 goto out; 324 325 total_nla_size += msg_len; 326 prev_min_dump_alloc = cb->min_dump_alloc; 327 if (total_nla_size > prev_min_dump_alloc) 328 cb->min_dump_alloc = min_t(u32, total_nla_size, 329 MAX_DUMP_ALLOC_SIZE); 330 331 if (!first_nlmsg) 332 goto errout; 333 334 if (cb->min_dump_alloc > prev_min_dump_alloc) 335 /* Retry with pskb_expand_head() with 336 * __GFP_DIRECT_RECLAIM 337 */ 338 goto errout; 339 340 WARN_ON_ONCE(total_nla_size <= prev_min_dump_alloc); 341 342 /* Send what we have for this sk 343 * and move on to the next sk in the following 344 * dump() 345 */ 346 } 347 348 out: 349 nlmsg_end(skb, nlh); 350 return 0; 351 352 errout: 353 nlmsg_cancel(skb, nlh); 354 return -EMSGSIZE; 355 } 356 EXPORT_SYMBOL_GPL(inet_sk_diag_fill); 357 358 static int inet_twsk_diag_fill(struct sock *sk, 359 struct sk_buff *skb, 360 struct netlink_callback *cb, 361 u16 nlmsg_flags) 362 { 363 struct inet_timewait_sock *tw = inet_twsk(sk); 364 struct inet_diag_msg *r; 365 struct nlmsghdr *nlh; 366 long tmo; 367 368 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, 369 cb->nlh->nlmsg_seq, cb->nlh->nlmsg_type, 370 sizeof(*r), nlmsg_flags); 371 if (!nlh) 372 return -EMSGSIZE; 373 374 r = nlmsg_data(nlh); 375 BUG_ON(tw->tw_state != TCP_TIME_WAIT); 376 377 inet_diag_msg_common_fill(r, sk); 378 r->idiag_retrans = 0; 379 380 r->idiag_state = tw->tw_substate; 381 r->idiag_timer = 3; 382 tmo = tw->tw_timer.expires - jiffies; 383 r->idiag_expires = jiffies_delta_to_msecs(tmo); 384 r->idiag_rqueue = 0; 385 r->idiag_wqueue = 0; 386 r->idiag_uid = 0; 387 r->idiag_inode = 0; 388 389 nlmsg_end(skb, nlh); 390 return 0; 391 } 392 393 static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb, 394 struct netlink_callback *cb, 395 u16 nlmsg_flags, bool net_admin) 396 { 397 struct request_sock *reqsk = inet_reqsk(sk); 398 struct inet_diag_msg *r; 399 struct nlmsghdr *nlh; 400 long tmo; 401 402 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 403 cb->nlh->nlmsg_type, sizeof(*r), nlmsg_flags); 404 if (!nlh) 405 return -EMSGSIZE; 406 407 r = nlmsg_data(nlh); 408 inet_diag_msg_common_fill(r, sk); 409 r->idiag_state = TCP_SYN_RECV; 410 r->idiag_timer = 1; 411 r->idiag_retrans = reqsk->num_retrans; 412 413 BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) != 414 offsetof(struct sock, sk_cookie)); 415 416 tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies; 417 r->idiag_expires = jiffies_delta_to_msecs(tmo); 418 r->idiag_rqueue = 0; 419 r->idiag_wqueue = 0; 420 r->idiag_uid = 0; 421 r->idiag_inode = 0; 422 423 if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, 424 inet_rsk(reqsk)->ir_mark)) 425 return -EMSGSIZE; 426 427 nlmsg_end(skb, nlh); 428 return 0; 429 } 430 431 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, 432 struct netlink_callback *cb, 433 const struct inet_diag_req_v2 *r, 434 u16 nlmsg_flags, bool net_admin) 435 { 436 if (sk->sk_state == TCP_TIME_WAIT) 437 return inet_twsk_diag_fill(sk, skb, cb, nlmsg_flags); 438 439 if (sk->sk_state == TCP_NEW_SYN_RECV) 440 return inet_req_diag_fill(sk, skb, cb, nlmsg_flags, net_admin); 441 442 return inet_sk_diag_fill(sk, inet_csk(sk), skb, cb, r, nlmsg_flags, 443 net_admin); 444 } 445 446 struct sock *inet_diag_find_one_icsk(struct net *net, 447 struct inet_hashinfo *hashinfo, 448 const struct inet_diag_req_v2 *req) 449 { 450 struct sock *sk; 451 452 rcu_read_lock(); 453 if (req->sdiag_family == AF_INET) 454 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0], 455 req->id.idiag_dport, req->id.idiag_src[0], 456 req->id.idiag_sport, req->id.idiag_if); 457 #if IS_ENABLED(CONFIG_IPV6) 458 else if (req->sdiag_family == AF_INET6) { 459 if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) && 460 ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src)) 461 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3], 462 req->id.idiag_dport, req->id.idiag_src[3], 463 req->id.idiag_sport, req->id.idiag_if); 464 else 465 sk = inet6_lookup(net, hashinfo, NULL, 0, 466 (struct in6_addr *)req->id.idiag_dst, 467 req->id.idiag_dport, 468 (struct in6_addr *)req->id.idiag_src, 469 req->id.idiag_sport, 470 req->id.idiag_if); 471 } 472 #endif 473 else { 474 rcu_read_unlock(); 475 return ERR_PTR(-EINVAL); 476 } 477 rcu_read_unlock(); 478 if (!sk) 479 return ERR_PTR(-ENOENT); 480 481 if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) { 482 sock_gen_put(sk); 483 return ERR_PTR(-ENOENT); 484 } 485 486 return sk; 487 } 488 EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk); 489 490 int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, 491 struct netlink_callback *cb, 492 const struct inet_diag_req_v2 *req) 493 { 494 struct sk_buff *in_skb = cb->skb; 495 bool net_admin = netlink_net_capable(in_skb, CAP_NET_ADMIN); 496 struct net *net = sock_net(in_skb->sk); 497 struct sk_buff *rep; 498 struct sock *sk; 499 int err; 500 501 sk = inet_diag_find_one_icsk(net, hashinfo, req); 502 if (IS_ERR(sk)) 503 return PTR_ERR(sk); 504 505 rep = nlmsg_new(inet_sk_attr_size(sk, req, net_admin), GFP_KERNEL); 506 if (!rep) { 507 err = -ENOMEM; 508 goto out; 509 } 510 511 err = sk_diag_fill(sk, rep, cb, req, 0, net_admin); 512 if (err < 0) { 513 WARN_ON(err == -EMSGSIZE); 514 nlmsg_free(rep); 515 goto out; 516 } 517 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, 518 MSG_DONTWAIT); 519 if (err > 0) 520 err = 0; 521 522 out: 523 if (sk) 524 sock_gen_put(sk); 525 526 return err; 527 } 528 EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); 529 530 static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb, 531 const struct nlmsghdr *nlh, 532 const struct inet_diag_req_v2 *req) 533 { 534 const struct inet_diag_handler *handler; 535 int err; 536 537 handler = inet_diag_lock_handler(req->sdiag_protocol); 538 if (IS_ERR(handler)) { 539 err = PTR_ERR(handler); 540 } else if (cmd == SOCK_DIAG_BY_FAMILY) { 541 struct inet_diag_dump_data empty_dump_data = {}; 542 struct netlink_callback cb = { 543 .nlh = nlh, 544 .skb = in_skb, 545 .data = &empty_dump_data, 546 }; 547 err = handler->dump_one(&cb, req); 548 } else if (cmd == SOCK_DESTROY && handler->destroy) { 549 err = handler->destroy(in_skb, req); 550 } else { 551 err = -EOPNOTSUPP; 552 } 553 inet_diag_unlock_handler(handler); 554 555 return err; 556 } 557 558 static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) 559 { 560 int words = bits >> 5; 561 562 bits &= 0x1f; 563 564 if (words) { 565 if (memcmp(a1, a2, words << 2)) 566 return 0; 567 } 568 if (bits) { 569 __be32 w1, w2; 570 __be32 mask; 571 572 w1 = a1[words]; 573 w2 = a2[words]; 574 575 mask = htonl((0xffffffff) << (32 - bits)); 576 577 if ((w1 ^ w2) & mask) 578 return 0; 579 } 580 581 return 1; 582 } 583 584 static int inet_diag_bc_run(const struct nlattr *_bc, 585 const struct inet_diag_entry *entry) 586 { 587 const void *bc = nla_data(_bc); 588 int len = nla_len(_bc); 589 590 while (len > 0) { 591 int yes = 1; 592 const struct inet_diag_bc_op *op = bc; 593 594 switch (op->code) { 595 case INET_DIAG_BC_NOP: 596 break; 597 case INET_DIAG_BC_JMP: 598 yes = 0; 599 break; 600 case INET_DIAG_BC_S_EQ: 601 yes = entry->sport == op[1].no; 602 break; 603 case INET_DIAG_BC_S_GE: 604 yes = entry->sport >= op[1].no; 605 break; 606 case INET_DIAG_BC_S_LE: 607 yes = entry->sport <= op[1].no; 608 break; 609 case INET_DIAG_BC_D_EQ: 610 yes = entry->dport == op[1].no; 611 break; 612 case INET_DIAG_BC_D_GE: 613 yes = entry->dport >= op[1].no; 614 break; 615 case INET_DIAG_BC_D_LE: 616 yes = entry->dport <= op[1].no; 617 break; 618 case INET_DIAG_BC_AUTO: 619 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); 620 break; 621 case INET_DIAG_BC_S_COND: 622 case INET_DIAG_BC_D_COND: { 623 const struct inet_diag_hostcond *cond; 624 const __be32 *addr; 625 626 cond = (const struct inet_diag_hostcond *)(op + 1); 627 if (cond->port != -1 && 628 cond->port != (op->code == INET_DIAG_BC_S_COND ? 629 entry->sport : entry->dport)) { 630 yes = 0; 631 break; 632 } 633 634 if (op->code == INET_DIAG_BC_S_COND) 635 addr = entry->saddr; 636 else 637 addr = entry->daddr; 638 639 if (cond->family != AF_UNSPEC && 640 cond->family != entry->family) { 641 if (entry->family == AF_INET6 && 642 cond->family == AF_INET) { 643 if (addr[0] == 0 && addr[1] == 0 && 644 addr[2] == htonl(0xffff) && 645 bitstring_match(addr + 3, 646 cond->addr, 647 cond->prefix_len)) 648 break; 649 } 650 yes = 0; 651 break; 652 } 653 654 if (cond->prefix_len == 0) 655 break; 656 if (bitstring_match(addr, cond->addr, 657 cond->prefix_len)) 658 break; 659 yes = 0; 660 break; 661 } 662 case INET_DIAG_BC_DEV_COND: { 663 u32 ifindex; 664 665 ifindex = *((const u32 *)(op + 1)); 666 if (ifindex != entry->ifindex) 667 yes = 0; 668 break; 669 } 670 case INET_DIAG_BC_MARK_COND: { 671 struct inet_diag_markcond *cond; 672 673 cond = (struct inet_diag_markcond *)(op + 1); 674 if ((entry->mark & cond->mask) != cond->mark) 675 yes = 0; 676 break; 677 } 678 } 679 680 if (yes) { 681 len -= op->yes; 682 bc += op->yes; 683 } else { 684 len -= op->no; 685 bc += op->no; 686 } 687 } 688 return len == 0; 689 } 690 691 /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV) 692 */ 693 static void entry_fill_addrs(struct inet_diag_entry *entry, 694 const struct sock *sk) 695 { 696 #if IS_ENABLED(CONFIG_IPV6) 697 if (sk->sk_family == AF_INET6) { 698 entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32; 699 entry->daddr = sk->sk_v6_daddr.s6_addr32; 700 } else 701 #endif 702 { 703 entry->saddr = &sk->sk_rcv_saddr; 704 entry->daddr = &sk->sk_daddr; 705 } 706 } 707 708 int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) 709 { 710 struct inet_sock *inet = inet_sk(sk); 711 struct inet_diag_entry entry; 712 713 if (!bc) 714 return 1; 715 716 entry.family = sk->sk_family; 717 entry_fill_addrs(&entry, sk); 718 entry.sport = inet->inet_num; 719 entry.dport = ntohs(inet->inet_dport); 720 entry.ifindex = sk->sk_bound_dev_if; 721 entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0; 722 if (sk_fullsock(sk)) 723 entry.mark = sk->sk_mark; 724 else if (sk->sk_state == TCP_NEW_SYN_RECV) 725 entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark; 726 else 727 entry.mark = 0; 728 729 return inet_diag_bc_run(bc, &entry); 730 } 731 EXPORT_SYMBOL_GPL(inet_diag_bc_sk); 732 733 static int valid_cc(const void *bc, int len, int cc) 734 { 735 while (len >= 0) { 736 const struct inet_diag_bc_op *op = bc; 737 738 if (cc > len) 739 return 0; 740 if (cc == len) 741 return 1; 742 if (op->yes < 4 || op->yes & 3) 743 return 0; 744 len -= op->yes; 745 bc += op->yes; 746 } 747 return 0; 748 } 749 750 /* data is u32 ifindex */ 751 static bool valid_devcond(const struct inet_diag_bc_op *op, int len, 752 int *min_len) 753 { 754 /* Check ifindex space. */ 755 *min_len += sizeof(u32); 756 if (len < *min_len) 757 return false; 758 759 return true; 760 } 761 /* Validate an inet_diag_hostcond. */ 762 static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, 763 int *min_len) 764 { 765 struct inet_diag_hostcond *cond; 766 int addr_len; 767 768 /* Check hostcond space. */ 769 *min_len += sizeof(struct inet_diag_hostcond); 770 if (len < *min_len) 771 return false; 772 cond = (struct inet_diag_hostcond *)(op + 1); 773 774 /* Check address family and address length. */ 775 switch (cond->family) { 776 case AF_UNSPEC: 777 addr_len = 0; 778 break; 779 case AF_INET: 780 addr_len = sizeof(struct in_addr); 781 break; 782 case AF_INET6: 783 addr_len = sizeof(struct in6_addr); 784 break; 785 default: 786 return false; 787 } 788 *min_len += addr_len; 789 if (len < *min_len) 790 return false; 791 792 /* Check prefix length (in bits) vs address length (in bytes). */ 793 if (cond->prefix_len > 8 * addr_len) 794 return false; 795 796 return true; 797 } 798 799 /* Validate a port comparison operator. */ 800 static bool valid_port_comparison(const struct inet_diag_bc_op *op, 801 int len, int *min_len) 802 { 803 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ 804 *min_len += sizeof(struct inet_diag_bc_op); 805 if (len < *min_len) 806 return false; 807 return true; 808 } 809 810 static bool valid_markcond(const struct inet_diag_bc_op *op, int len, 811 int *min_len) 812 { 813 *min_len += sizeof(struct inet_diag_markcond); 814 return len >= *min_len; 815 } 816 817 static int inet_diag_bc_audit(const struct nlattr *attr, 818 const struct sk_buff *skb) 819 { 820 bool net_admin = netlink_net_capable(skb, CAP_NET_ADMIN); 821 const void *bytecode, *bc; 822 int bytecode_len, len; 823 824 if (!attr || nla_len(attr) < sizeof(struct inet_diag_bc_op)) 825 return -EINVAL; 826 827 bytecode = bc = nla_data(attr); 828 len = bytecode_len = nla_len(attr); 829 830 while (len > 0) { 831 int min_len = sizeof(struct inet_diag_bc_op); 832 const struct inet_diag_bc_op *op = bc; 833 834 switch (op->code) { 835 case INET_DIAG_BC_S_COND: 836 case INET_DIAG_BC_D_COND: 837 if (!valid_hostcond(bc, len, &min_len)) 838 return -EINVAL; 839 break; 840 case INET_DIAG_BC_DEV_COND: 841 if (!valid_devcond(bc, len, &min_len)) 842 return -EINVAL; 843 break; 844 case INET_DIAG_BC_S_EQ: 845 case INET_DIAG_BC_S_GE: 846 case INET_DIAG_BC_S_LE: 847 case INET_DIAG_BC_D_EQ: 848 case INET_DIAG_BC_D_GE: 849 case INET_DIAG_BC_D_LE: 850 if (!valid_port_comparison(bc, len, &min_len)) 851 return -EINVAL; 852 break; 853 case INET_DIAG_BC_MARK_COND: 854 if (!net_admin) 855 return -EPERM; 856 if (!valid_markcond(bc, len, &min_len)) 857 return -EINVAL; 858 break; 859 case INET_DIAG_BC_AUTO: 860 case INET_DIAG_BC_JMP: 861 case INET_DIAG_BC_NOP: 862 break; 863 default: 864 return -EINVAL; 865 } 866 867 if (op->code != INET_DIAG_BC_NOP) { 868 if (op->no < min_len || op->no > len + 4 || op->no & 3) 869 return -EINVAL; 870 if (op->no < len && 871 !valid_cc(bytecode, bytecode_len, len - op->no)) 872 return -EINVAL; 873 } 874 875 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) 876 return -EINVAL; 877 bc += op->yes; 878 len -= op->yes; 879 } 880 return len == 0 ? 0 : -EINVAL; 881 } 882 883 static void twsk_build_assert(void) 884 { 885 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) != 886 offsetof(struct sock, sk_family)); 887 888 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) != 889 offsetof(struct inet_sock, inet_num)); 890 891 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) != 892 offsetof(struct inet_sock, inet_dport)); 893 894 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) != 895 offsetof(struct inet_sock, inet_rcv_saddr)); 896 897 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) != 898 offsetof(struct inet_sock, inet_daddr)); 899 900 #if IS_ENABLED(CONFIG_IPV6) 901 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) != 902 offsetof(struct sock, sk_v6_rcv_saddr)); 903 904 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) != 905 offsetof(struct sock, sk_v6_daddr)); 906 #endif 907 } 908 909 void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, 910 struct netlink_callback *cb, 911 const struct inet_diag_req_v2 *r) 912 { 913 bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN); 914 struct inet_diag_dump_data *cb_data = cb->data; 915 struct net *net = sock_net(skb->sk); 916 u32 idiag_states = r->idiag_states; 917 int i, num, s_i, s_num; 918 struct nlattr *bc; 919 struct sock *sk; 920 921 bc = cb_data->inet_diag_nla_bc; 922 if (idiag_states & TCPF_SYN_RECV) 923 idiag_states |= TCPF_NEW_SYN_RECV; 924 s_i = cb->args[1]; 925 s_num = num = cb->args[2]; 926 927 if (cb->args[0] == 0) { 928 if (!(idiag_states & TCPF_LISTEN) || r->id.idiag_dport) 929 goto skip_listen_ht; 930 931 for (i = s_i; i < INET_LHTABLE_SIZE; i++) { 932 struct inet_listen_hashbucket *ilb; 933 struct hlist_nulls_node *node; 934 935 num = 0; 936 ilb = &hashinfo->listening_hash[i]; 937 spin_lock(&ilb->lock); 938 sk_nulls_for_each(sk, node, &ilb->nulls_head) { 939 struct inet_sock *inet = inet_sk(sk); 940 941 if (!net_eq(sock_net(sk), net)) 942 continue; 943 944 if (num < s_num) { 945 num++; 946 continue; 947 } 948 949 if (r->sdiag_family != AF_UNSPEC && 950 sk->sk_family != r->sdiag_family) 951 goto next_listen; 952 953 if (r->id.idiag_sport != inet->inet_sport && 954 r->id.idiag_sport) 955 goto next_listen; 956 957 if (!inet_diag_bc_sk(bc, sk)) 958 goto next_listen; 959 960 if (inet_sk_diag_fill(sk, inet_csk(sk), skb, 961 cb, r, NLM_F_MULTI, 962 net_admin) < 0) { 963 spin_unlock(&ilb->lock); 964 goto done; 965 } 966 967 next_listen: 968 ++num; 969 } 970 spin_unlock(&ilb->lock); 971 972 s_num = 0; 973 } 974 skip_listen_ht: 975 cb->args[0] = 1; 976 s_i = num = s_num = 0; 977 } 978 979 if (!(idiag_states & ~TCPF_LISTEN)) 980 goto out; 981 982 #define SKARR_SZ 16 983 for (i = s_i; i <= hashinfo->ehash_mask; i++) { 984 struct inet_ehash_bucket *head = &hashinfo->ehash[i]; 985 spinlock_t *lock = inet_ehash_lockp(hashinfo, i); 986 struct hlist_nulls_node *node; 987 struct sock *sk_arr[SKARR_SZ]; 988 int num_arr[SKARR_SZ]; 989 int idx, accum, res; 990 991 if (hlist_nulls_empty(&head->chain)) 992 continue; 993 994 if (i > s_i) 995 s_num = 0; 996 997 next_chunk: 998 num = 0; 999 accum = 0; 1000 spin_lock_bh(lock); 1001 sk_nulls_for_each(sk, node, &head->chain) { 1002 int state; 1003 1004 if (!net_eq(sock_net(sk), net)) 1005 continue; 1006 if (num < s_num) 1007 goto next_normal; 1008 state = (sk->sk_state == TCP_TIME_WAIT) ? 1009 inet_twsk(sk)->tw_substate : sk->sk_state; 1010 if (!(idiag_states & (1 << state))) 1011 goto next_normal; 1012 if (r->sdiag_family != AF_UNSPEC && 1013 sk->sk_family != r->sdiag_family) 1014 goto next_normal; 1015 if (r->id.idiag_sport != htons(sk->sk_num) && 1016 r->id.idiag_sport) 1017 goto next_normal; 1018 if (r->id.idiag_dport != sk->sk_dport && 1019 r->id.idiag_dport) 1020 goto next_normal; 1021 twsk_build_assert(); 1022 1023 if (!inet_diag_bc_sk(bc, sk)) 1024 goto next_normal; 1025 1026 if (!refcount_inc_not_zero(&sk->sk_refcnt)) 1027 goto next_normal; 1028 1029 num_arr[accum] = num; 1030 sk_arr[accum] = sk; 1031 if (++accum == SKARR_SZ) 1032 break; 1033 next_normal: 1034 ++num; 1035 } 1036 spin_unlock_bh(lock); 1037 res = 0; 1038 for (idx = 0; idx < accum; idx++) { 1039 if (res >= 0) { 1040 res = sk_diag_fill(sk_arr[idx], skb, cb, r, 1041 NLM_F_MULTI, net_admin); 1042 if (res < 0) 1043 num = num_arr[idx]; 1044 } 1045 sock_gen_put(sk_arr[idx]); 1046 } 1047 if (res < 0) 1048 break; 1049 cond_resched(); 1050 if (accum == SKARR_SZ) { 1051 s_num = num + 1; 1052 goto next_chunk; 1053 } 1054 } 1055 1056 done: 1057 cb->args[1] = i; 1058 cb->args[2] = num; 1059 out: 1060 ; 1061 } 1062 EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); 1063 1064 static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, 1065 const struct inet_diag_req_v2 *r) 1066 { 1067 const struct inet_diag_handler *handler; 1068 u32 prev_min_dump_alloc; 1069 int err = 0; 1070 1071 again: 1072 prev_min_dump_alloc = cb->min_dump_alloc; 1073 handler = inet_diag_lock_handler(r->sdiag_protocol); 1074 if (!IS_ERR(handler)) 1075 handler->dump(skb, cb, r); 1076 else 1077 err = PTR_ERR(handler); 1078 inet_diag_unlock_handler(handler); 1079 1080 /* The skb is not large enough to fit one sk info and 1081 * inet_sk_diag_fill() has requested for a larger skb. 1082 */ 1083 if (!skb->len && cb->min_dump_alloc > prev_min_dump_alloc) { 1084 err = pskb_expand_head(skb, 0, cb->min_dump_alloc, GFP_KERNEL); 1085 if (!err) 1086 goto again; 1087 } 1088 1089 return err ? : skb->len; 1090 } 1091 1092 static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) 1093 { 1094 return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh)); 1095 } 1096 1097 static int __inet_diag_dump_start(struct netlink_callback *cb, int hdrlen) 1098 { 1099 const struct nlmsghdr *nlh = cb->nlh; 1100 struct inet_diag_dump_data *cb_data; 1101 struct sk_buff *skb = cb->skb; 1102 struct nlattr *nla; 1103 int rem, err; 1104 1105 cb_data = kzalloc(sizeof(*cb_data), GFP_KERNEL); 1106 if (!cb_data) 1107 return -ENOMEM; 1108 1109 nla_for_each_attr(nla, nlmsg_attrdata(nlh, hdrlen), 1110 nlmsg_attrlen(nlh, hdrlen), rem) { 1111 int type = nla_type(nla); 1112 1113 if (type < __INET_DIAG_REQ_MAX) 1114 cb_data->req_nlas[type] = nla; 1115 } 1116 1117 nla = cb_data->inet_diag_nla_bc; 1118 if (nla) { 1119 err = inet_diag_bc_audit(nla, skb); 1120 if (err) { 1121 kfree(cb_data); 1122 return err; 1123 } 1124 } 1125 1126 nla = cb_data->inet_diag_nla_bpf_stgs; 1127 if (nla) { 1128 struct bpf_sk_storage_diag *bpf_stg_diag; 1129 1130 bpf_stg_diag = bpf_sk_storage_diag_alloc(nla); 1131 if (IS_ERR(bpf_stg_diag)) { 1132 kfree(cb_data); 1133 return PTR_ERR(bpf_stg_diag); 1134 } 1135 cb_data->bpf_stg_diag = bpf_stg_diag; 1136 } 1137 1138 cb->data = cb_data; 1139 return 0; 1140 } 1141 1142 static int inet_diag_dump_start(struct netlink_callback *cb) 1143 { 1144 return __inet_diag_dump_start(cb, sizeof(struct inet_diag_req_v2)); 1145 } 1146 1147 static int inet_diag_dump_start_compat(struct netlink_callback *cb) 1148 { 1149 return __inet_diag_dump_start(cb, sizeof(struct inet_diag_req)); 1150 } 1151 1152 static int inet_diag_dump_done(struct netlink_callback *cb) 1153 { 1154 struct inet_diag_dump_data *cb_data = cb->data; 1155 1156 bpf_sk_storage_diag_free(cb_data->bpf_stg_diag); 1157 kfree(cb->data); 1158 1159 return 0; 1160 } 1161 1162 static int inet_diag_type2proto(int type) 1163 { 1164 switch (type) { 1165 case TCPDIAG_GETSOCK: 1166 return IPPROTO_TCP; 1167 case DCCPDIAG_GETSOCK: 1168 return IPPROTO_DCCP; 1169 default: 1170 return 0; 1171 } 1172 } 1173 1174 static int inet_diag_dump_compat(struct sk_buff *skb, 1175 struct netlink_callback *cb) 1176 { 1177 struct inet_diag_req *rc = nlmsg_data(cb->nlh); 1178 struct inet_diag_req_v2 req; 1179 1180 req.sdiag_family = AF_UNSPEC; /* compatibility */ 1181 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); 1182 req.idiag_ext = rc->idiag_ext; 1183 req.idiag_states = rc->idiag_states; 1184 req.id = rc->id; 1185 1186 return __inet_diag_dump(skb, cb, &req); 1187 } 1188 1189 static int inet_diag_get_exact_compat(struct sk_buff *in_skb, 1190 const struct nlmsghdr *nlh) 1191 { 1192 struct inet_diag_req *rc = nlmsg_data(nlh); 1193 struct inet_diag_req_v2 req; 1194 1195 req.sdiag_family = rc->idiag_family; 1196 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); 1197 req.idiag_ext = rc->idiag_ext; 1198 req.idiag_states = rc->idiag_states; 1199 req.id = rc->id; 1200 1201 return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req); 1202 } 1203 1204 static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) 1205 { 1206 int hdrlen = sizeof(struct inet_diag_req); 1207 struct net *net = sock_net(skb->sk); 1208 1209 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || 1210 nlmsg_len(nlh) < hdrlen) 1211 return -EINVAL; 1212 1213 if (nlh->nlmsg_flags & NLM_F_DUMP) { 1214 struct netlink_dump_control c = { 1215 .start = inet_diag_dump_start_compat, 1216 .done = inet_diag_dump_done, 1217 .dump = inet_diag_dump_compat, 1218 }; 1219 return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); 1220 } 1221 1222 return inet_diag_get_exact_compat(skb, nlh); 1223 } 1224 1225 static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h) 1226 { 1227 int hdrlen = sizeof(struct inet_diag_req_v2); 1228 struct net *net = sock_net(skb->sk); 1229 1230 if (nlmsg_len(h) < hdrlen) 1231 return -EINVAL; 1232 1233 if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY && 1234 h->nlmsg_flags & NLM_F_DUMP) { 1235 struct netlink_dump_control c = { 1236 .start = inet_diag_dump_start, 1237 .done = inet_diag_dump_done, 1238 .dump = inet_diag_dump, 1239 }; 1240 return netlink_dump_start(net->diag_nlsk, skb, h, &c); 1241 } 1242 1243 return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h)); 1244 } 1245 1246 static 1247 int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk) 1248 { 1249 const struct inet_diag_handler *handler; 1250 struct nlmsghdr *nlh; 1251 struct nlattr *attr; 1252 struct inet_diag_msg *r; 1253 void *info = NULL; 1254 int err = 0; 1255 1256 nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0); 1257 if (!nlh) 1258 return -ENOMEM; 1259 1260 r = nlmsg_data(nlh); 1261 memset(r, 0, sizeof(*r)); 1262 inet_diag_msg_common_fill(r, sk); 1263 if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM) 1264 r->id.idiag_sport = inet_sk(sk)->inet_sport; 1265 r->idiag_state = sk->sk_state; 1266 1267 if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) { 1268 nlmsg_cancel(skb, nlh); 1269 return err; 1270 } 1271 1272 handler = inet_diag_lock_handler(sk->sk_protocol); 1273 if (IS_ERR(handler)) { 1274 inet_diag_unlock_handler(handler); 1275 nlmsg_cancel(skb, nlh); 1276 return PTR_ERR(handler); 1277 } 1278 1279 attr = handler->idiag_info_size 1280 ? nla_reserve_64bit(skb, INET_DIAG_INFO, 1281 handler->idiag_info_size, 1282 INET_DIAG_PAD) 1283 : NULL; 1284 if (attr) 1285 info = nla_data(attr); 1286 1287 handler->idiag_get_info(sk, r, info); 1288 inet_diag_unlock_handler(handler); 1289 1290 nlmsg_end(skb, nlh); 1291 return 0; 1292 } 1293 1294 static const struct sock_diag_handler inet_diag_handler = { 1295 .family = AF_INET, 1296 .dump = inet_diag_handler_cmd, 1297 .get_info = inet_diag_handler_get_info, 1298 .destroy = inet_diag_handler_cmd, 1299 }; 1300 1301 static const struct sock_diag_handler inet6_diag_handler = { 1302 .family = AF_INET6, 1303 .dump = inet_diag_handler_cmd, 1304 .get_info = inet_diag_handler_get_info, 1305 .destroy = inet_diag_handler_cmd, 1306 }; 1307 1308 int inet_diag_register(const struct inet_diag_handler *h) 1309 { 1310 const __u16 type = h->idiag_type; 1311 int err = -EINVAL; 1312 1313 if (type >= IPPROTO_MAX) 1314 goto out; 1315 1316 mutex_lock(&inet_diag_table_mutex); 1317 err = -EEXIST; 1318 if (!inet_diag_table[type]) { 1319 inet_diag_table[type] = h; 1320 err = 0; 1321 } 1322 mutex_unlock(&inet_diag_table_mutex); 1323 out: 1324 return err; 1325 } 1326 EXPORT_SYMBOL_GPL(inet_diag_register); 1327 1328 void inet_diag_unregister(const struct inet_diag_handler *h) 1329 { 1330 const __u16 type = h->idiag_type; 1331 1332 if (type >= IPPROTO_MAX) 1333 return; 1334 1335 mutex_lock(&inet_diag_table_mutex); 1336 inet_diag_table[type] = NULL; 1337 mutex_unlock(&inet_diag_table_mutex); 1338 } 1339 EXPORT_SYMBOL_GPL(inet_diag_unregister); 1340 1341 static int __init inet_diag_init(void) 1342 { 1343 const int inet_diag_table_size = (IPPROTO_MAX * 1344 sizeof(struct inet_diag_handler *)); 1345 int err = -ENOMEM; 1346 1347 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); 1348 if (!inet_diag_table) 1349 goto out; 1350 1351 err = sock_diag_register(&inet_diag_handler); 1352 if (err) 1353 goto out_free_nl; 1354 1355 err = sock_diag_register(&inet6_diag_handler); 1356 if (err) 1357 goto out_free_inet; 1358 1359 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); 1360 out: 1361 return err; 1362 1363 out_free_inet: 1364 sock_diag_unregister(&inet_diag_handler); 1365 out_free_nl: 1366 kfree(inet_diag_table); 1367 goto out; 1368 } 1369 1370 static void __exit inet_diag_exit(void) 1371 { 1372 sock_diag_unregister(&inet6_diag_handler); 1373 sock_diag_unregister(&inet_diag_handler); 1374 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); 1375 kfree(inet_diag_table); 1376 } 1377 1378 module_init(inet_diag_init); 1379 module_exit(inet_diag_exit); 1380 MODULE_LICENSE("GPL"); 1381 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); 1382 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); 1383