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                 return -EMSGSIZE;
 360
 361         nlmsg_end(skb, nlh);
 362         return 0;
 363 }
 364
 365 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
 366                         const struct inet_diag_req_v2 *r,
 367                         struct user_namespace *user_ns,
 368                         u32 portid, u32 seq, u16 nlmsg_flags,
 369                         const struct nlmsghdr *unlh, bool net_admin)
 370 {
 371         if (sk->sk_state == TCP_TIME_WAIT)
 372                 return inet_twsk_diag_fill(sk, skb, portid, seq,
 373                                            nlmsg_flags, unlh);
 374
 375         if (sk->sk_state == TCP_NEW_SYN_RECV)
 376                 return inet_req_diag_fill(sk, skb, portid, seq,
 377                                           nlmsg_flags, unlh, net_admin);
 378
 379         return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq,
 380                                   nlmsg_flags, unlh, net_admin);
 381 }
 382
 383 struct sock *inet_diag_find_one_icsk(struct net *net,
 384                                      struct inet_hashinfo *hashinfo,
 385                                      const struct inet_diag_req_v2 *req)
 386 {
 387         struct sock *sk;
 388
 389         rcu_read_lock();
 390         if (req->sdiag_family == AF_INET)
 391                 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0],
 392                                  req->id.idiag_dport, req->id.idiag_src[0],
 393                                  req->id.idiag_sport, req->id.idiag_if);
 394 #if IS_ENABLED(CONFIG_IPV6)
 395         else if (req->sdiag_family == AF_INET6) {
 396                 if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) &&
 397                     ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src))
 398                         sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3],
 399                                          req->id.idiag_dport, req->id.idiag_src[3],
 400                                          req->id.idiag_sport, req->id.idiag_if);
 401                 else
 402                         sk = inet6_lookup(net, hashinfo, NULL, 0,
 403                                           (struct in6_addr *)req->id.idiag_dst,
 404                                           req->id.idiag_dport,
 405                                           (struct in6_addr *)req->id.idiag_src,
 406                                           req->id.idiag_sport,
 407                                           req->id.idiag_if);
 408         }
 409 #endif
 410         else {
 411                 rcu_read_unlock();
 412                 return ERR_PTR(-EINVAL);
 413         }
 414         rcu_read_unlock();
 415         if (!sk)
 416                 return ERR_PTR(-ENOENT);
 417
 418         if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) {
 419                 sock_gen_put(sk);
 420                 return ERR_PTR(-ENOENT);
 421         }
 422
 423         return sk;
 424 }
 425 EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk);
 426
 427 int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
 428                             struct sk_buff *in_skb,
 429                             const struct nlmsghdr *nlh,
 430                             const struct inet_diag_req_v2 *req)
 431 {
 432         struct net *net = sock_net(in_skb->sk);
 433         struct sk_buff *rep;
 434         struct sock *sk;
 435         int err;
 436
 437         sk = inet_diag_find_one_icsk(net, hashinfo, req);
 438         if (IS_ERR(sk))
 439                 return PTR_ERR(sk);
 440
 441         rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL);
 442         if (!rep) {
 443                 err = -ENOMEM;
 444                 goto out;
 445         }
 446
 447         err = sk_diag_fill(sk, rep, req,
 448                            sk_user_ns(NETLINK_CB(in_skb).sk),
 449                            NETLINK_CB(in_skb).portid,
 450                            nlh->nlmsg_seq, 0, nlh,
 451                            netlink_net_capable(in_skb, CAP_NET_ADMIN));
 452         if (err < 0) {
 453                 WARN_ON(err == -EMSGSIZE);
 454                 nlmsg_free(rep);
 455                 goto out;
 456         }
 457         err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
 458                               MSG_DONTWAIT);
 459         if (err > 0)
 460                 err = 0;
 461
 462 out:
 463         if (sk)
 464                 sock_gen_put(sk);
 465
 466         return err;
 467 }
 468 EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
 469
 470 static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb,
 471                                const struct nlmsghdr *nlh,
 472                                const struct inet_diag_req_v2 *req)
 473 {
 474         const struct inet_diag_handler *handler;
 475         int err;
 476
 477         handler = inet_diag_lock_handler(req->sdiag_protocol);
 478         if (IS_ERR(handler))
 479                 err = PTR_ERR(handler);
 480         else if (cmd == SOCK_DIAG_BY_FAMILY)
 481                 err = handler->dump_one(in_skb, nlh, req);
 482         else if (cmd == SOCK_DESTROY && handler->destroy)
 483                 err = handler->destroy(in_skb, req);
 484         else
 485                 err = -EOPNOTSUPP;
 486         inet_diag_unlock_handler(handler);
 487
 488         return err;
 489 }
 490
 491 static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
 492 {
 493         int words = bits >> 5;
 494
 495         bits &= 0x1f;
 496
 497         if (words) {
 498                 if (memcmp(a1, a2, words << 2))
 499                         return 0;
 500         }
 501         if (bits) {
 502                 __be32 w1, w2;
 503                 __be32 mask;
 504
 505                 w1 = a1[words];
 506                 w2 = a2[words];
 507
 508                 mask = htonl((0xffffffff) << (32 - bits));
 509
 510                 if ((w1 ^ w2) & mask)
 511                         return 0;
 512         }
 513
 514         return 1;
 515 }
 516
 517 static int inet_diag_bc_run(const struct nlattr *_bc,
 518                             const struct inet_diag_entry *entry)
 519 {
 520         const void *bc = nla_data(_bc);
 521         int len = nla_len(_bc);
 522
 523         while (len > 0) {
 524                 int yes = 1;
 525                 const struct inet_diag_bc_op *op = bc;
 526
 527                 switch (op->code) {
 528                 case INET_DIAG_BC_NOP:
 529                         break;
 530                 case INET_DIAG_BC_JMP:
 531                         yes = 0;
 532                         break;
 533                 case INET_DIAG_BC_S_GE:
 534                         yes = entry->sport >= op[1].no;
 535                         break;
 536                 case INET_DIAG_BC_S_LE:
 537                         yes = entry->sport <= op[1].no;
 538                         break;
 539                 case INET_DIAG_BC_D_GE:
 540                         yes = entry->dport >= op[1].no;
 541                         break;
 542                 case INET_DIAG_BC_D_LE:
 543                         yes = entry->dport <= op[1].no;
 544                         break;
 545                 case INET_DIAG_BC_AUTO:
 546                         yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
 547                         break;
 548                 case INET_DIAG_BC_S_COND:
 549                 case INET_DIAG_BC_D_COND: {
 550                         const struct inet_diag_hostcond *cond;
 551                         const __be32 *addr;
 552
 553                         cond = (const struct inet_diag_hostcond *)(op + 1);
 554                         if (cond->port != -1 &&
 555                             cond->port != (op->code == INET_DIAG_BC_S_COND ?
 556                                              entry->sport : entry->dport)) {
 557                                 yes = 0;
 558                                 break;
 559                         }
 560
 561                         if (op->code == INET_DIAG_BC_S_COND)
 562                                 addr = entry->saddr;
 563                         else
 564                                 addr = entry->daddr;
 565
 566                         if (cond->family != AF_UNSPEC &&
 567                             cond->family != entry->family) {
 568                                 if (entry->family == AF_INET6 &&
 569                                     cond->family == AF_INET) {
 570                                         if (addr[0] == 0 && addr[1] == 0 &&
 571                                             addr[2] == htonl(0xffff) &&
 572                                             bitstring_match(addr + 3,
 573                                                             cond->addr,
 574                                                             cond->prefix_len))
 575                                                 break;
 576                                 }
 577                                 yes = 0;
 578                                 break;
 579                         }
 580
 581                         if (cond->prefix_len == 0)
 582                                 break;
 583                         if (bitstring_match(addr, cond->addr,
 584                                             cond->prefix_len))
 585                                 break;
 586                         yes = 0;
 587                         break;
 588                 }
 589                 case INET_DIAG_BC_DEV_COND: {
 590                         u32 ifindex;
 591
 592                         ifindex = *((const u32 *)(op + 1));
 593                         if (ifindex != entry->ifindex)
 594                                 yes = 0;
 595                         break;
 596                 }
 597                 case INET_DIAG_BC_MARK_COND: {
 598                         struct inet_diag_markcond *cond;
 599
 600                         cond = (struct inet_diag_markcond *)(op + 1);
 601                         if ((entry->mark & cond->mask) != cond->mark)
 602                                 yes = 0;
 603                         break;
 604                 }
 605                 }
 606
 607                 if (yes) {
 608                         len -= op->yes;
 609                         bc += op->yes;
 610                 } else {
 611                         len -= op->no;
 612                         bc += op->no;
 613                 }
 614         }
 615         return len == 0;
 616 }
 617
 618 /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV)
 619  */
 620 static void entry_fill_addrs(struct inet_diag_entry *entry,
 621                              const struct sock *sk)
 622 {
 623 #if IS_ENABLED(CONFIG_IPV6)
 624         if (sk->sk_family == AF_INET6) {
 625                 entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32;
 626                 entry->daddr = sk->sk_v6_daddr.s6_addr32;
 627         } else
 628 #endif
 629         {
 630                 entry->saddr = &sk->sk_rcv_saddr;
 631                 entry->daddr = &sk->sk_daddr;
 632         }
 633 }
 634
 635 int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
 636 {
 637         struct inet_sock *inet = inet_sk(sk);
 638         struct inet_diag_entry entry;
 639
 640         if (!bc)
 641                 return 1;
 642
 643         entry.family = sk->sk_family;
 644         entry_fill_addrs(&entry, sk);
 645         entry.sport = inet->inet_num;
 646         entry.dport = ntohs(inet->inet_dport);
 647         entry.ifindex = sk->sk_bound_dev_if;
 648         entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0;
 649         if (sk_fullsock(sk))
 650                 entry.mark = sk->sk_mark;
 651         else if (sk->sk_state == TCP_NEW_SYN_RECV)
 652                 entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark;
 653         else
 654                 entry.mark = 0;
 655
 656         return inet_diag_bc_run(bc, &entry);
 657 }
 658 EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
 659
 660 static int valid_cc(const void *bc, int len, int cc)
 661 {
 662         while (len >= 0) {
 663                 const struct inet_diag_bc_op *op = bc;
 664
 665                 if (cc > len)
 666                         return 0;
 667                 if (cc == len)
 668                         return 1;
 669                 if (op->yes < 4 || op->yes & 3)
 670                         return 0;
 671                 len -= op->yes;
 672                 bc  += op->yes;
 673         }
 674         return 0;
 675 }
 676
 677 /* data is u32 ifindex */
 678 static bool valid_devcond(const struct inet_diag_bc_op *op, int len,
 679                           int *min_len)
 680 {
 681         /* Check ifindex space. */
 682         *min_len += sizeof(u32);
 683         if (len < *min_len)
 684                 return false;
 685
 686         return true;
 687 }
 688 /* Validate an inet_diag_hostcond. */
 689 static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
 690                            int *min_len)
 691 {
 692         struct inet_diag_hostcond *cond;
 693         int addr_len;
 694
 695         /* Check hostcond space. */
 696         *min_len += sizeof(struct inet_diag_hostcond);
 697         if (len < *min_len)
 698                 return false;
 699         cond = (struct inet_diag_hostcond *)(op + 1);
 700
 701         /* Check address family and address length. */
 702         switch (cond->family) {
 703         case AF_UNSPEC:
 704                 addr_len = 0;
 705                 break;
 706         case AF_INET:
 707                 addr_len = sizeof(struct in_addr);
 708                 break;
 709         case AF_INET6:
 710                 addr_len = sizeof(struct in6_addr);
 711                 break;
 712         default:
 713                 return false;
 714         }
 715         *min_len += addr_len;
 716         if (len < *min_len)
 717                 return false;
 718
 719         /* Check prefix length (in bits) vs address length (in bytes). */
 720         if (cond->prefix_len > 8 * addr_len)
 721                 return false;
 722
 723         return true;
 724 }
 725
 726 /* Validate a port comparison operator. */
 727 static bool valid_port_comparison(const struct inet_diag_bc_op *op,
 728                                   int len, int *min_len)
 729 {
 730         /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
 731         *min_len += sizeof(struct inet_diag_bc_op);
 732         if (len < *min_len)
 733                 return false;
 734         return true;
 735 }
 736
 737 static bool valid_markcond(const struct inet_diag_bc_op *op, int len,
 738                            int *min_len)
 739 {
 740         *min_len += sizeof(struct inet_diag_markcond);
 741         return len >= *min_len;
 742 }
 743
 744 static int inet_diag_bc_audit(const struct nlattr *attr,
 745                               const struct sk_buff *skb)
 746 {
 747         bool net_admin = netlink_net_capable(skb, CAP_NET_ADMIN);
 748         const void *bytecode, *bc;
 749         int bytecode_len, len;
 750
 751         if (!attr || nla_len(attr) < sizeof(struct inet_diag_bc_op))
 752                 return -EINVAL;
 753
 754         bytecode = bc = nla_data(attr);
 755         len = bytecode_len = nla_len(attr);
 756
 757         while (len > 0) {
 758                 int min_len = sizeof(struct inet_diag_bc_op);
 759                 const struct inet_diag_bc_op *op = bc;
 760
 761                 switch (op->code) {
 762                 case INET_DIAG_BC_S_COND:
 763                 case INET_DIAG_BC_D_COND:
 764                         if (!valid_hostcond(bc, len, &min_len))
 765                                 return -EINVAL;
 766                         break;
 767                 case INET_DIAG_BC_DEV_COND:
 768                         if (!valid_devcond(bc, len, &min_len))
 769                                 return -EINVAL;
 770                         break;
 771                 case INET_DIAG_BC_S_GE:
 772                 case INET_DIAG_BC_S_LE:
 773                 case INET_DIAG_BC_D_GE:
 774                 case INET_DIAG_BC_D_LE:
 775                         if (!valid_port_comparison(bc, len, &min_len))
 776                                 return -EINVAL;
 777                         break;
 778                 case INET_DIAG_BC_MARK_COND:
 779                         if (!net_admin)
 780                                 return -EPERM;
 781                         if (!valid_markcond(bc, len, &min_len))
 782                                 return -EINVAL;
 783                         break;
 784                 case INET_DIAG_BC_AUTO:
 785                 case INET_DIAG_BC_JMP:
 786                 case INET_DIAG_BC_NOP:
 787                         break;
 788                 default:
 789                         return -EINVAL;
 790                 }
 791
 792                 if (op->code != INET_DIAG_BC_NOP) {
 793                         if (op->no < min_len || op->no > len + 4 || op->no & 3)
 794                                 return -EINVAL;
 795                         if (op->no < len &&
 796                             !valid_cc(bytecode, bytecode_len, len - op->no))
 797                                 return -EINVAL;
 798                 }
 799
 800                 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
 801                         return -EINVAL;
 802                 bc  += op->yes;
 803                 len -= op->yes;
 804         }
 805         return len == 0 ? 0 : -EINVAL;
 806 }
 807
 808 static int inet_csk_diag_dump(struct sock *sk,
 809                               struct sk_buff *skb,
 810                               struct netlink_callback *cb,
 811                               const struct inet_diag_req_v2 *r,
 812                               const struct nlattr *bc,
 813                               bool net_admin)
 814 {
 815         if (!inet_diag_bc_sk(bc, sk))
 816                 return 0;
 817
 818         return inet_csk_diag_fill(sk, skb, r,
 819                                   sk_user_ns(NETLINK_CB(cb->skb).sk),
 820                                   NETLINK_CB(cb->skb).portid,
 821                                   cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh,
 822                                   net_admin);
 823 }
 824
 825 static void twsk_build_assert(void)
 826 {
 827         BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) !=
 828                      offsetof(struct sock, sk_family));
 829
 830         BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) !=
 831                      offsetof(struct inet_sock, inet_num));
 832
 833         BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) !=
 834                      offsetof(struct inet_sock, inet_dport));
 835
 836         BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) !=
 837                      offsetof(struct inet_sock, inet_rcv_saddr));
 838
 839         BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) !=
 840                      offsetof(struct inet_sock, inet_daddr));
 841
 842 #if IS_ENABLED(CONFIG_IPV6)
 843         BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) !=
 844                      offsetof(struct sock, sk_v6_rcv_saddr));
 845
 846         BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) !=
 847                      offsetof(struct sock, sk_v6_daddr));
 848 #endif
 849 }
 850
 851 void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
 852                          struct netlink_callback *cb,
 853                          const struct inet_diag_req_v2 *r, struct nlattr *bc)
 854 {
 855         struct net *net = sock_net(skb->sk);
 856         int i, num, s_i, s_num;
 857         u32 idiag_states = r->idiag_states;
 858         bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN);
 859
 860         if (idiag_states & TCPF_SYN_RECV)
 861                 idiag_states |= TCPF_NEW_SYN_RECV;
 862         s_i = cb->args[1];
 863         s_num = num = cb->args[2];
 864
 865         if (cb->args[0] == 0) {
 866                 if (!(idiag_states & TCPF_LISTEN))
 867                         goto skip_listen_ht;
 868
 869                 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
 870                         struct inet_listen_hashbucket *ilb;
 871                         struct sock *sk;
 872
 873                         num = 0;
 874                         ilb = &hashinfo->listening_hash[i];
 875                         spin_lock_bh(&ilb->lock);
 876                         sk_for_each(sk, &ilb->head) {
 877                                 struct inet_sock *inet = inet_sk(sk);
 878
 879                                 if (!net_eq(sock_net(sk), net))
 880                                         continue;
 881
 882                                 if (num < s_num) {
 883                                         num++;
 884                                         continue;
 885                                 }
 886
 887                                 if (r->sdiag_family != AF_UNSPEC &&
 888                                     sk->sk_family != r->sdiag_family)
 889                                         goto next_listen;
 890
 891                                 if (r->id.idiag_sport != inet->inet_sport &&
 892                                     r->id.idiag_sport)
 893                                         goto next_listen;
 894
 895                                 if (r->id.idiag_dport ||
 896                                     cb->args[3] > 0)
 897                                         goto next_listen;
 898
 899                                 if (inet_csk_diag_dump(sk, skb, cb, r,
 900                                                        bc, net_admin) < 0) {
 901                                         spin_unlock_bh(&ilb->lock);
 902                                         goto done;
 903                                 }
 904
 905 next_listen:
 906                                 cb->args[3] = 0;
 907                                 cb->args[4] = 0;
 908                                 ++num;
 909                         }
 910                         spin_unlock_bh(&ilb->lock);
 911
 912                         s_num = 0;
 913                         cb->args[3] = 0;
 914                         cb->args[4] = 0;
 915                 }
 916 skip_listen_ht:
 917                 cb->args[0] = 1;
 918                 s_i = num = s_num = 0;
 919         }
 920
 921         if (!(idiag_states & ~TCPF_LISTEN))
 922                 goto out;
 923
 924         for (i = s_i; i <= hashinfo->ehash_mask; i++) {
 925                 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
 926                 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
 927                 struct hlist_nulls_node *node;
 928                 struct sock *sk;
 929
 930                 num = 0;
 931
 932                 if (hlist_nulls_empty(&head->chain))
 933                         continue;
 934
 935                 if (i > s_i)
 936                         s_num = 0;
 937
 938                 spin_lock_bh(lock);
 939                 sk_nulls_for_each(sk, node, &head->chain) {
 940                         int state, res;
 941
 942                         if (!net_eq(sock_net(sk), net))
 943                                 continue;
 944                         if (num < s_num)
 945                                 goto next_normal;
 946                         state = (sk->sk_state == TCP_TIME_WAIT) ?
 947                                 inet_twsk(sk)->tw_substate : sk->sk_state;
 948                         if (!(idiag_states & (1 << state)))
 949                                 goto next_normal;
 950                         if (r->sdiag_family != AF_UNSPEC &&
 951                             sk->sk_family != r->sdiag_family)
 952                                 goto next_normal;
 953                         if (r->id.idiag_sport != htons(sk->sk_num) &&
 954                             r->id.idiag_sport)
 955                                 goto next_normal;
 956                         if (r->id.idiag_dport != sk->sk_dport &&
 957                             r->id.idiag_dport)
 958                                 goto next_normal;
 959                         twsk_build_assert();
 960
 961                         if (!inet_diag_bc_sk(bc, sk))
 962                                 goto next_normal;
 963
 964                         res = sk_diag_fill(sk, skb, r,
 965                                            sk_user_ns(NETLINK_CB(cb->skb).sk),
 966                                            NETLINK_CB(cb->skb).portid,
 967                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
 968                                            cb->nlh, net_admin);
 969                         if (res < 0) {
 970                                 spin_unlock_bh(lock);
 971                                 goto done;
 972                         }
 973 next_normal:
 974                         ++num;
 975                 }
 976
 977                 spin_unlock_bh(lock);
 978                 cond_resched();
 979         }
 980
 981 done:
 982         cb->args[1] = i;
 983         cb->args[2] = num;
 984 out:
 985         ;
 986 }
 987 EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
 988
 989 static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
 990                             const struct inet_diag_req_v2 *r,
 991                             struct nlattr *bc)
 992 {
 993         const struct inet_diag_handler *handler;
 994         int err = 0;
 995
 996         handler = inet_diag_lock_handler(r->sdiag_protocol);
 997         if (!IS_ERR(handler))
 998                 handler->dump(skb, cb, r, bc);
 999         else
1000                 err = PTR_ERR(handler);
1001         inet_diag_unlock_handler(handler);
1002
1003         return err ? : skb->len;
1004 }
1005
1006 static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
1007 {
1008         int hdrlen = sizeof(struct inet_diag_req_v2);
1009         struct nlattr *bc = NULL;
1010
1011         if (nlmsg_attrlen(cb->nlh, hdrlen))
1012                 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1013
1014         return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc);
1015 }
1016
1017 static int inet_diag_type2proto(int type)
1018 {
1019         switch (type) {
1020         case TCPDIAG_GETSOCK:
1021                 return IPPROTO_TCP;
1022         case DCCPDIAG_GETSOCK:
1023                 return IPPROTO_DCCP;
1024         default:
1025                 return 0;
1026         }
1027 }
1028
1029 static int inet_diag_dump_compat(struct sk_buff *skb,
1030                                  struct netlink_callback *cb)
1031 {
1032         struct inet_diag_req *rc = nlmsg_data(cb->nlh);
1033         int hdrlen = sizeof(struct inet_diag_req);
1034         struct inet_diag_req_v2 req;
1035         struct nlattr *bc = NULL;
1036
1037         req.sdiag_family = AF_UNSPEC; /* compatibility */
1038         req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
1039         req.idiag_ext = rc->idiag_ext;
1040         req.idiag_states = rc->idiag_states;
1041         req.id = rc->id;
1042
1043         if (nlmsg_attrlen(cb->nlh, hdrlen))
1044                 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1045
1046         return __inet_diag_dump(skb, cb, &req, bc);
1047 }
1048
1049 static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
1050                                       const struct nlmsghdr *nlh)
1051 {
1052         struct inet_diag_req *rc = nlmsg_data(nlh);
1053         struct inet_diag_req_v2 req;
1054
1055         req.sdiag_family = rc->idiag_family;
1056         req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
1057         req.idiag_ext = rc->idiag_ext;
1058         req.idiag_states = rc->idiag_states;
1059         req.id = rc->id;
1060
1061         return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req);
1062 }
1063
1064 static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
1065 {
1066         int hdrlen = sizeof(struct inet_diag_req);
1067         struct net *net = sock_net(skb->sk);
1068
1069         if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
1070             nlmsg_len(nlh) < hdrlen)
1071                 return -EINVAL;
1072
1073         if (nlh->nlmsg_flags & NLM_F_DUMP) {
1074                 if (nlmsg_attrlen(nlh, hdrlen)) {
1075                         struct nlattr *attr;
1076                         int err;
1077
1078                         attr = nlmsg_find_attr(nlh, hdrlen,
1079                                                INET_DIAG_REQ_BYTECODE);
1080                         err = inet_diag_bc_audit(attr, skb);
1081                         if (err)
1082                                 return err;
1083                 }
1084                 {
1085                         struct netlink_dump_control c = {
1086                                 .dump = inet_diag_dump_compat,
1087                         };
1088                         return netlink_dump_start(net->diag_nlsk, skb, nlh, &c);
1089                 }
1090         }
1091
1092         return inet_diag_get_exact_compat(skb, nlh);
1093 }
1094
1095 static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h)
1096 {
1097         int hdrlen = sizeof(struct inet_diag_req_v2);
1098         struct net *net = sock_net(skb->sk);
1099
1100         if (nlmsg_len(h) < hdrlen)
1101                 return -EINVAL;
1102
1103         if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
1104             h->nlmsg_flags & NLM_F_DUMP) {
1105                 if (nlmsg_attrlen(h, hdrlen)) {
1106                         struct nlattr *attr;
1107                         int err;
1108
1109                         attr = nlmsg_find_attr(h, hdrlen,
1110                                                INET_DIAG_REQ_BYTECODE);
1111                         err = inet_diag_bc_audit(attr, skb);
1112                         if (err)
1113                                 return err;
1114                 }
1115                 {
1116                         struct netlink_dump_control c = {
1117                                 .dump = inet_diag_dump,
1118                         };
1119                         return netlink_dump_start(net->diag_nlsk, skb, h, &c);
1120                 }
1121         }
1122
1123         return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h));
1124 }
1125
1126 static
1127 int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk)
1128 {
1129         const struct inet_diag_handler *handler;
1130         struct nlmsghdr *nlh;
1131         struct nlattr *attr;
1132         struct inet_diag_msg *r;
1133         void *info = NULL;
1134         int err = 0;
1135
1136         nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0);
1137         if (!nlh)
1138                 return -ENOMEM;
1139
1140         r = nlmsg_data(nlh);
1141         memset(r, 0, sizeof(*r));
1142         inet_diag_msg_common_fill(r, sk);
1143         if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM)
1144                 r->id.idiag_sport = inet_sk(sk)->inet_sport;
1145         r->idiag_state = sk->sk_state;
1146
1147         if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) {
1148                 nlmsg_cancel(skb, nlh);
1149                 return err;
1150         }
1151
1152         handler = inet_diag_lock_handler(sk->sk_protocol);
1153         if (IS_ERR(handler)) {
1154                 inet_diag_unlock_handler(handler);
1155                 nlmsg_cancel(skb, nlh);
1156                 return PTR_ERR(handler);
1157         }
1158
1159         attr = handler->idiag_info_size
1160                 ? nla_reserve_64bit(skb, INET_DIAG_INFO,
1161                                     handler->idiag_info_size,
1162                                     INET_DIAG_PAD)
1163                 : NULL;
1164         if (attr)
1165                 info = nla_data(attr);
1166
1167         handler->idiag_get_info(sk, r, info);
1168         inet_diag_unlock_handler(handler);
1169
1170         nlmsg_end(skb, nlh);
1171         return 0;
1172 }
1173
1174 static const struct sock_diag_handler inet_diag_handler = {
1175         .family = AF_INET,
1176         .dump = inet_diag_handler_cmd,
1177         .get_info = inet_diag_handler_get_info,
1178         .destroy = inet_diag_handler_cmd,
1179 };
1180
1181 static const struct sock_diag_handler inet6_diag_handler = {
1182         .family = AF_INET6,
1183         .dump = inet_diag_handler_cmd,
1184         .get_info = inet_diag_handler_get_info,
1185         .destroy = inet_diag_handler_cmd,
1186 };
1187
1188 int inet_diag_register(const struct inet_diag_handler *h)
1189 {
1190         const __u16 type = h->idiag_type;
1191         int err = -EINVAL;
1192
1193         if (type >= IPPROTO_MAX)
1194                 goto out;
1195
1196         mutex_lock(&inet_diag_table_mutex);
1197         err = -EEXIST;
1198         if (!inet_diag_table[type]) {
1199                 inet_diag_table[type] = h;
1200                 err = 0;
1201         }
1202         mutex_unlock(&inet_diag_table_mutex);
1203 out:
1204         return err;
1205 }
1206 EXPORT_SYMBOL_GPL(inet_diag_register);
1207
1208 void inet_diag_unregister(const struct inet_diag_handler *h)
1209 {
1210         const __u16 type = h->idiag_type;
1211
1212         if (type >= IPPROTO_MAX)
1213                 return;
1214
1215         mutex_lock(&inet_diag_table_mutex);
1216         inet_diag_table[type] = NULL;
1217         mutex_unlock(&inet_diag_table_mutex);
1218 }
1219 EXPORT_SYMBOL_GPL(inet_diag_unregister);
1220
1221 static int __init inet_diag_init(void)
1222 {
1223         const int inet_diag_table_size = (IPPROTO_MAX *
1224                                           sizeof(struct inet_diag_handler *));
1225         int err = -ENOMEM;
1226
1227         inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
1228         if (!inet_diag_table)
1229                 goto out;
1230
1231         err = sock_diag_register(&inet_diag_handler);
1232         if (err)
1233                 goto out_free_nl;
1234
1235         err = sock_diag_register(&inet6_diag_handler);
1236         if (err)
1237                 goto out_free_inet;
1238
1239         sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
1240 out:
1241         return err;
1242
1243 out_free_inet:
1244         sock_diag_unregister(&inet_diag_handler);
1245 out_free_nl:
1246         kfree(inet_diag_table);
1247         goto out;
1248 }
1249
1250 static void __exit inet_diag_exit(void)
1251 {
1252         sock_diag_unregister(&inet6_diag_handler);
1253         sock_diag_unregister(&inet_diag_handler);
1254         sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
1255         kfree(inet_diag_table);
1256 }
1257
1258 module_init(inet_diag_init);
1259 module_exit(inet_diag_exit);
1260 MODULE_LICENSE("GPL");
1261 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
1262 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);