net/ipv4/inet_diag.c

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