net/ipv6/af_inet6.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *      PF_INET6 socket protocol family
   4  *      Linux INET6 implementation
   5  *
   6  *      Authors:
   7  *      Pedro Roque             <roque@di.fc.ul.pt>
   8  *
   9  *      Adapted from linux/net/ipv4/af_inet.c
  10  *
  11  *      Fixes:
  12  *      piggy, Karl Knutson     :       Socket protocol table
  13  *      Hideaki YOSHIFUJI       :       sin6_scope_id support
  14  *      Arnaldo Melo            :       check proc_net_create return, cleanups
  15  */
  16
  17 #define pr_fmt(fmt) "IPv6: " fmt
  18
  19 #include <linux/module.h>
  20 #include <linux/capability.h>
  21 #include <linux/errno.h>
  22 #include <linux/types.h>
  23 #include <linux/socket.h>
  24 #include <linux/in.h>
  25 #include <linux/kernel.h>
  26 #include <linux/timer.h>
  27 #include <linux/string.h>
  28 #include <linux/sockios.h>
  29 #include <linux/net.h>
  30 #include <linux/fcntl.h>
  31 #include <linux/mm.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/proc_fs.h>
  34 #include <linux/stat.h>
  35 #include <linux/init.h>
  36 #include <linux/slab.h>
  37
  38 #include <linux/inet.h>
  39 #include <linux/netdevice.h>
  40 #include <linux/icmpv6.h>
  41 #include <linux/netfilter_ipv6.h>
  42
  43 #include <net/ip.h>
  44 #include <net/ipv6.h>
  45 #include <net/udp.h>
  46 #include <net/udplite.h>
  47 #include <net/tcp.h>
  48 #include <net/ping.h>
  49 #include <net/protocol.h>
  50 #include <net/inet_common.h>
  51 #include <net/route.h>
  52 #include <net/transp_v6.h>
  53 #include <net/ip6_route.h>
  54 #include <net/addrconf.h>
  55 #include <net/ipv6_stubs.h>
  56 #include <net/ndisc.h>
  57 #ifdef CONFIG_IPV6_TUNNEL
  58 #include <net/ip6_tunnel.h>
  59 #endif
  60 #include <net/calipso.h>
  61 #include <net/seg6.h>
  62 #include <net/rpl.h>
  63 #include <net/compat.h>
  64 #include <net/xfrm.h>
  65
  66 #include <linux/uaccess.h>
  67 #include <linux/mroute6.h>
  68
  69 #include "ip6_offload.h"
  70
  71 MODULE_AUTHOR("Cast of dozens");
  72 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
  73 MODULE_LICENSE("GPL");
  74
  75 /* The inetsw6 table contains everything that inet6_create needs to
  76  * build a new socket.
  77  */
  78 static struct list_head inetsw6[SOCK_MAX];
  79 static DEFINE_SPINLOCK(inetsw6_lock);
  80
  81 struct ipv6_params ipv6_defaults = {
  82         .disable_ipv6 = 0,
  83         .autoconf = 1,
  84 };
  85
  86 static int disable_ipv6_mod;
  87
  88 module_param_named(disable, disable_ipv6_mod, int, 0444);
  89 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
  90
  91 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
  92 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
  93
  94 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
  95 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
  96
  97 bool ipv6_mod_enabled(void)
  98 {
  99         return disable_ipv6_mod == 0;
 100 }
 101 EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
 102
 103 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
 104 {
 105         const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
 106
 107         return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
 108 }
 109
 110 void inet6_sock_destruct(struct sock *sk)
 111 {
 112         inet6_cleanup_sock(sk);
 113         inet_sock_destruct(sk);
 114 }
 115 EXPORT_SYMBOL_GPL(inet6_sock_destruct);
 116
 117 static int inet6_create(struct net *net, struct socket *sock, int protocol,
 118                         int kern)
 119 {
 120         struct inet_sock *inet;
 121         struct ipv6_pinfo *np;
 122         struct sock *sk;
 123         struct inet_protosw *answer;
 124         struct proto *answer_prot;
 125         unsigned char answer_flags;
 126         int try_loading_module = 0;
 127         int err;
 128
 129         if (protocol < 0 || protocol >= IPPROTO_MAX)
 130                 return -EINVAL;
 131
 132         /* Look for the requested type/protocol pair. */
 133 lookup_protocol:
 134         err = -ESOCKTNOSUPPORT;
 135         rcu_read_lock();
 136         list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
 137
 138                 err = 0;
 139                 /* Check the non-wild match. */
 140                 if (protocol == answer->protocol) {
 141                         if (protocol != IPPROTO_IP)
 142                                 break;
 143                 } else {
 144                         /* Check for the two wild cases. */
 145                         if (IPPROTO_IP == protocol) {
 146                                 protocol = answer->protocol;
 147                                 break;
 148                         }
 149                         if (IPPROTO_IP == answer->protocol)
 150                                 break;
 151                 }
 152                 err = -EPROTONOSUPPORT;
 153         }
 154
 155         if (err) {
 156                 if (try_loading_module < 2) {
 157                         rcu_read_unlock();
 158                         /*
 159                          * Be more specific, e.g. net-pf-10-proto-132-type-1
 160                          * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
 161                          */
 162                         if (++try_loading_module == 1)
 163                                 request_module("net-pf-%d-proto-%d-type-%d",
 164                                                 PF_INET6, protocol, sock->type);
 165                         /*
 166                          * Fall back to generic, e.g. net-pf-10-proto-132
 167                          * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
 168                          */
 169                         else
 170                                 request_module("net-pf-%d-proto-%d",
 171                                                 PF_INET6, protocol);
 172                         goto lookup_protocol;
 173                 } else
 174                         goto out_rcu_unlock;
 175         }
 176
 177         err = -EPERM;
 178         if (sock->type == SOCK_RAW && !kern &&
 179             !ns_capable(net->user_ns, CAP_NET_RAW))
 180                 goto out_rcu_unlock;
 181
 182         sock->ops = answer->ops;
 183         answer_prot = answer->prot;
 184         answer_flags = answer->flags;
 185         rcu_read_unlock();
 186
 187         WARN_ON(!answer_prot->slab);
 188
 189         err = -ENOBUFS;
 190         sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
 191         if (!sk)
 192                 goto out;
 193
 194         sock_init_data(sock, sk);
 195
 196         err = 0;
 197         if (INET_PROTOSW_REUSE & answer_flags)
 198                 sk->sk_reuse = SK_CAN_REUSE;
 199
 200         if (INET_PROTOSW_ICSK & answer_flags)
 201                 inet_init_csk_locks(sk);
 202
 203         inet = inet_sk(sk);
 204         inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
 205
 206         if (SOCK_RAW == sock->type) {
 207                 inet->inet_num = protocol;
 208                 if (IPPROTO_RAW == protocol)
 209                         inet->hdrincl = 1;
 210         }
 211
 212         sk->sk_destruct         = inet6_sock_destruct;
 213         sk->sk_family           = PF_INET6;
 214         sk->sk_protocol         = protocol;
 215
 216         sk->sk_backlog_rcv      = answer->prot->backlog_rcv;
 217
 218         inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
 219         np->hop_limit   = -1;
 220         np->mcast_hops  = IPV6_DEFAULT_MCASTHOPS;
 221         np->mc_loop     = 1;
 222         np->mc_all      = 1;
 223         np->pmtudisc    = IPV6_PMTUDISC_WANT;
 224         np->repflow     = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
 225         sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
 226
 227         /* Init the ipv4 part of the socket since we can have sockets
 228          * using v6 API for ipv4.
 229          */
 230         inet->uc_ttl    = -1;
 231
 232         inet->mc_loop   = 1;
 233         inet->mc_ttl    = 1;
 234         inet->mc_index  = 0;
 235         inet->mc_list   = NULL;
 236         inet->rcv_tos   = 0;
 237
 238         if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
 239                 inet->pmtudisc = IP_PMTUDISC_DONT;
 240         else
 241                 inet->pmtudisc = IP_PMTUDISC_WANT;
 242         /*
 243          * Increment only the relevant sk_prot->socks debug field, this changes
 244          * the previous behaviour of incrementing both the equivalent to
 245          * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
 246          *
 247          * This allows better debug granularity as we'll know exactly how many
 248          * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
 249          * transport protocol socks. -acme
 250          */
 251         sk_refcnt_debug_inc(sk);
 252
 253         if (inet->inet_num) {
 254                 /* It assumes that any protocol which allows
 255                  * the user to assign a number at socket
 256                  * creation time automatically shares.
 257                  */
 258                 inet->inet_sport = htons(inet->inet_num);
 259                 err = sk->sk_prot->hash(sk);
 260                 if (err) {
 261                         sk_common_release(sk);
 262                         goto out;
 263                 }
 264         }
 265         if (sk->sk_prot->init) {
 266                 err = sk->sk_prot->init(sk);
 267                 if (err) {
 268                         sk_common_release(sk);
 269                         goto out;
 270                 }
 271         }
 272
 273         if (!kern) {
 274                 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
 275                 if (err) {
 276                         sk_common_release(sk);
 277                         goto out;
 278                 }
 279         }
 280 out:
 281         return err;
 282 out_rcu_unlock:
 283         rcu_read_unlock();
 284         goto out;
 285 }
 286
 287 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
 288                         u32 flags)
 289 {
 290         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
 291         struct inet_sock *inet = inet_sk(sk);
 292         struct ipv6_pinfo *np = inet6_sk(sk);
 293         struct net *net = sock_net(sk);
 294         __be32 v4addr = 0;
 295         unsigned short snum;
 296         bool saved_ipv6only;
 297         int addr_type = 0;
 298         int err = 0;
 299
 300         if (addr->sin6_family != AF_INET6)
 301                 return -EAFNOSUPPORT;
 302
 303         addr_type = ipv6_addr_type(&addr->sin6_addr);
 304         if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
 305                 return -EINVAL;
 306
 307         snum = ntohs(addr->sin6_port);
 308         if (snum && inet_port_requires_bind_service(net, snum) &&
 309             !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
 310                 return -EACCES;
 311
 312         if (flags & BIND_WITH_LOCK)
 313                 lock_sock(sk);
 314
 315         /* Check these errors (active socket, double bind). */
 316         if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
 317                 err = -EINVAL;
 318                 goto out;
 319         }
 320
 321         /* Check if the address belongs to the host. */
 322         if (addr_type == IPV6_ADDR_MAPPED) {
 323                 struct net_device *dev = NULL;
 324                 int chk_addr_ret;
 325
 326                 /* Binding to v4-mapped address on a v6-only socket
 327                  * makes no sense
 328                  */
 329                 if (sk->sk_ipv6only) {
 330                         err = -EINVAL;
 331                         goto out;
 332                 }
 333
 334                 rcu_read_lock();
 335                 if (sk->sk_bound_dev_if) {
 336                         dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
 337                         if (!dev) {
 338                                 err = -ENODEV;
 339                                 goto out_unlock;
 340                         }
 341                 }
 342
 343                 /* Reproduce AF_INET checks to make the bindings consistent */
 344                 v4addr = addr->sin6_addr.s6_addr32[3];
 345                 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
 346                 rcu_read_unlock();
 347
 348                 if (!inet_can_nonlocal_bind(net, inet) &&
 349                     v4addr != htonl(INADDR_ANY) &&
 350                     chk_addr_ret != RTN_LOCAL &&
 351                     chk_addr_ret != RTN_MULTICAST &&
 352                     chk_addr_ret != RTN_BROADCAST) {
 353                         err = -EADDRNOTAVAIL;
 354                         goto out;
 355                 }
 356         } else {
 357                 if (addr_type != IPV6_ADDR_ANY) {
 358                         struct net_device *dev = NULL;
 359
 360                         rcu_read_lock();
 361                         if (__ipv6_addr_needs_scope_id(addr_type)) {
 362                                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 363                                     addr->sin6_scope_id) {
 364                                         /* Override any existing binding, if another one
 365                                          * is supplied by user.
 366                                          */
 367                                         sk->sk_bound_dev_if = addr->sin6_scope_id;
 368                                 }
 369
 370                                 /* Binding to link-local address requires an interface */
 371                                 if (!sk->sk_bound_dev_if) {
 372                                         err = -EINVAL;
 373                                         goto out_unlock;
 374                                 }
 375                         }
 376
 377                         if (sk->sk_bound_dev_if) {
 378                                 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
 379                                 if (!dev) {
 380                                         err = -ENODEV;
 381                                         goto out_unlock;
 382                                 }
 383                         }
 384
 385                         /* ipv4 addr of the socket is invalid.  Only the
 386                          * unspecified and mapped address have a v4 equivalent.
 387                          */
 388                         v4addr = LOOPBACK4_IPV6;
 389                         if (!(addr_type & IPV6_ADDR_MULTICAST)) {
 390                                 if (!ipv6_can_nonlocal_bind(net, inet) &&
 391                                     !ipv6_chk_addr(net, &addr->sin6_addr,
 392                                                    dev, 0)) {
 393                                         err = -EADDRNOTAVAIL;
 394                                         goto out_unlock;
 395                                 }
 396                         }
 397                         rcu_read_unlock();
 398                 }
 399         }
 400
 401         inet->inet_rcv_saddr = v4addr;
 402         inet->inet_saddr = v4addr;
 403
 404         sk->sk_v6_rcv_saddr = addr->sin6_addr;
 405
 406         if (!(addr_type & IPV6_ADDR_MULTICAST))
 407                 np->saddr = addr->sin6_addr;
 408
 409         saved_ipv6only = sk->sk_ipv6only;
 410         if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
 411                 sk->sk_ipv6only = 1;
 412
 413         /* Make sure we are allowed to bind here. */
 414         if (snum || !(inet->bind_address_no_port ||
 415                       (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
 416                 if (sk->sk_prot->get_port(sk, snum)) {
 417                         sk->sk_ipv6only = saved_ipv6only;
 418                         inet_reset_saddr(sk);
 419                         err = -EADDRINUSE;
 420                         goto out;
 421                 }
 422                 if (!(flags & BIND_FROM_BPF)) {
 423                         err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
 424                         if (err) {
 425                                 sk->sk_ipv6only = saved_ipv6only;
 426                                 inet_reset_saddr(sk);
 427                                 goto out;
 428                         }
 429                 }
 430         }
 431
 432         if (addr_type != IPV6_ADDR_ANY)
 433                 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
 434         if (snum)
 435                 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
 436         inet->inet_sport = htons(inet->inet_num);
 437         inet->inet_dport = 0;
 438         inet->inet_daddr = 0;
 439 out:
 440         if (flags & BIND_WITH_LOCK)
 441                 release_sock(sk);
 442         return err;
 443 out_unlock:
 444         rcu_read_unlock();
 445         goto out;
 446 }
 447
 448 /* bind for INET6 API */
 449 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 450 {
 451         struct sock *sk = sock->sk;
 452         int err = 0;
 453
 454         /* If the socket has its own bind function then use it. */
 455         if (sk->sk_prot->bind)
 456                 return sk->sk_prot->bind(sk, uaddr, addr_len);
 457
 458         if (addr_len < SIN6_LEN_RFC2133)
 459                 return -EINVAL;
 460
 461         /* BPF prog is run before any checks are done so that if the prog
 462          * changes context in a wrong way it will be caught.
 463          */
 464         err = BPF_CGROUP_RUN_PROG_INET6_BIND(sk, uaddr);
 465         if (err)
 466                 return err;
 467
 468         return __inet6_bind(sk, uaddr, addr_len, BIND_WITH_LOCK);
 469 }
 470 EXPORT_SYMBOL(inet6_bind);
 471
 472 int inet6_release(struct socket *sock)
 473 {
 474         struct sock *sk = sock->sk;
 475
 476         if (!sk)
 477                 return -EINVAL;
 478
 479         /* Free mc lists */
 480         ipv6_sock_mc_close(sk);
 481
 482         /* Free ac lists */
 483         ipv6_sock_ac_close(sk);
 484
 485         return inet_release(sock);
 486 }
 487 EXPORT_SYMBOL(inet6_release);
 488
 489 void inet6_destroy_sock(struct sock *sk)
 490 {
 491         struct ipv6_pinfo *np = inet6_sk(sk);
 492         struct sk_buff *skb;
 493         struct ipv6_txoptions *opt;
 494
 495         /* Release rx options */
 496
 497         skb = xchg(&np->pktoptions, NULL);
 498         kfree_skb(skb);
 499
 500         skb = xchg(&np->rxpmtu, NULL);
 501         kfree_skb(skb);
 502
 503         /* Free flowlabels */
 504         fl6_free_socklist(sk);
 505
 506         /* Free tx options */
 507
 508         opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
 509         if (opt) {
 510                 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
 511                 txopt_put(opt);
 512         }
 513 }
 514 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
 515
 516 void inet6_cleanup_sock(struct sock *sk)
 517 {
 518         inet6_destroy_sock(sk);
 519 }
 520 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
 521
 522 /*
 523  *      This does both peername and sockname.
 524  */
 525 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
 526                   int peer)
 527 {
 528         struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
 529         struct sock *sk = sock->sk;
 530         struct inet_sock *inet = inet_sk(sk);
 531         struct ipv6_pinfo *np = inet6_sk(sk);
 532
 533         sin->sin6_family = AF_INET6;
 534         sin->sin6_flowinfo = 0;
 535         sin->sin6_scope_id = 0;
 536         if (peer) {
 537                 if (!inet->inet_dport)
 538                         return -ENOTCONN;
 539                 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
 540                     peer == 1)
 541                         return -ENOTCONN;
 542                 sin->sin6_port = inet->inet_dport;
 543                 sin->sin6_addr = sk->sk_v6_daddr;
 544                 if (np->sndflow)
 545                         sin->sin6_flowinfo = np->flow_label;
 546         } else {
 547                 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
 548                         sin->sin6_addr = np->saddr;
 549                 else
 550                         sin->sin6_addr = sk->sk_v6_rcv_saddr;
 551                 sin->sin6_port = inet->inet_sport;
 552         }
 553         if (cgroup_bpf_enabled)
 554                 BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin,
 555                                             peer ? BPF_CGROUP_INET6_GETPEERNAME :
 556                                                    BPF_CGROUP_INET6_GETSOCKNAME,
 557                                             NULL);
 558         sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
 559                                                  sk->sk_bound_dev_if);
 560         return sizeof(*sin);
 561 }
 562 EXPORT_SYMBOL(inet6_getname);
 563
 564 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 565 {
 566         void __user *argp = (void __user *)arg;
 567         struct sock *sk = sock->sk;
 568         struct net *net = sock_net(sk);
 569
 570         switch (cmd) {
 571         case SIOCADDRT:
 572         case SIOCDELRT: {
 573                 struct in6_rtmsg rtmsg;
 574
 575                 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
 576                         return -EFAULT;
 577                 return ipv6_route_ioctl(net, cmd, &rtmsg);
 578         }
 579         case SIOCSIFADDR:
 580                 return addrconf_add_ifaddr(net, argp);
 581         case SIOCDIFADDR:
 582                 return addrconf_del_ifaddr(net, argp);
 583         case SIOCSIFDSTADDR:
 584                 return addrconf_set_dstaddr(net, argp);
 585         default:
 586                 if (!sk->sk_prot->ioctl)
 587                         return -ENOIOCTLCMD;
 588                 return sk->sk_prot->ioctl(sk, cmd, arg);
 589         }
 590         /*NOTREACHED*/
 591         return 0;
 592 }
 593 EXPORT_SYMBOL(inet6_ioctl);
 594
 595 #ifdef CONFIG_COMPAT
 596 struct compat_in6_rtmsg {
 597         struct in6_addr         rtmsg_dst;
 598         struct in6_addr         rtmsg_src;
 599         struct in6_addr         rtmsg_gateway;
 600         u32                     rtmsg_type;
 601         u16                     rtmsg_dst_len;
 602         u16                     rtmsg_src_len;
 603         u32                     rtmsg_metric;
 604         u32                     rtmsg_info;
 605         u32                     rtmsg_flags;
 606         s32                     rtmsg_ifindex;
 607 };
 608
 609 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
 610                 struct compat_in6_rtmsg __user *ur)
 611 {
 612         struct in6_rtmsg rt;
 613
 614         if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
 615                         3 * sizeof(struct in6_addr)) ||
 616             get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
 617             get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
 618             get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
 619             get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
 620             get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
 621             get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
 622             get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
 623                 return -EFAULT;
 624
 625
 626         return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
 627 }
 628
 629 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 630 {
 631         void __user *argp = compat_ptr(arg);
 632         struct sock *sk = sock->sk;
 633
 634         switch (cmd) {
 635         case SIOCADDRT:
 636         case SIOCDELRT:
 637                 return inet6_compat_routing_ioctl(sk, cmd, argp);
 638         default:
 639                 return -ENOIOCTLCMD;
 640         }
 641 }
 642 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
 643 #endif /* CONFIG_COMPAT */
 644
 645 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
 646                                             size_t));
 647 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
 648 {
 649         struct sock *sk = sock->sk;
 650
 651         if (unlikely(inet_send_prepare(sk)))
 652                 return -EAGAIN;
 653
 654         return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
 655                                sk, msg, size);
 656 }
 657
 658 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
 659                                             size_t, int, int, int *));
 660 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
 661                   int flags)
 662 {
 663         struct sock *sk = sock->sk;
 664         int addr_len = 0;
 665         int err;
 666
 667         if (likely(!(flags & MSG_ERRQUEUE)))
 668                 sock_rps_record_flow(sk);
 669
 670         err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
 671                               sk, msg, size, flags & MSG_DONTWAIT,
 672                               flags & ~MSG_DONTWAIT, &addr_len);
 673         if (err >= 0)
 674                 msg->msg_namelen = addr_len;
 675         return err;
 676 }
 677
 678 const struct proto_ops inet6_stream_ops = {
 679         .family            = PF_INET6,
 680         .owner             = THIS_MODULE,
 681         .release           = inet6_release,
 682         .bind              = inet6_bind,
 683         .connect           = inet_stream_connect,       /* ok           */
 684         .socketpair        = sock_no_socketpair,        /* a do nothing */
 685         .accept            = inet_accept,               /* ok           */
 686         .getname           = inet6_getname,
 687         .poll              = tcp_poll,                  /* ok           */
 688         .ioctl             = inet6_ioctl,               /* must change  */
 689         .gettstamp         = sock_gettstamp,
 690         .listen            = inet_listen,               /* ok           */
 691         .shutdown          = inet_shutdown,             /* ok           */
 692         .setsockopt        = sock_common_setsockopt,    /* ok           */
 693         .getsockopt        = sock_common_getsockopt,    /* ok           */
 694         .sendmsg           = inet6_sendmsg,             /* retpoline's sake */
 695         .recvmsg           = inet6_recvmsg,             /* retpoline's sake */
 696 #ifdef CONFIG_MMU
 697         .mmap              = tcp_mmap,
 698 #endif
 699         .sendpage          = inet_sendpage,
 700         .sendmsg_locked    = tcp_sendmsg_locked,
 701         .sendpage_locked   = tcp_sendpage_locked,
 702         .splice_read       = tcp_splice_read,
 703         .read_sock         = tcp_read_sock,
 704         .peek_len          = tcp_peek_len,
 705 #ifdef CONFIG_COMPAT
 706         .compat_ioctl      = inet6_compat_ioctl,
 707 #endif
 708         .set_rcvlowat      = tcp_set_rcvlowat,
 709 };
 710
 711 const struct proto_ops inet6_dgram_ops = {
 712         .family            = PF_INET6,
 713         .owner             = THIS_MODULE,
 714         .release           = inet6_release,
 715         .bind              = inet6_bind,
 716         .connect           = inet_dgram_connect,        /* ok           */
 717         .socketpair        = sock_no_socketpair,        /* a do nothing */
 718         .accept            = sock_no_accept,            /* a do nothing */
 719         .getname           = inet6_getname,
 720         .poll              = udp_poll,                  /* ok           */
 721         .ioctl             = inet6_ioctl,               /* must change  */
 722         .gettstamp         = sock_gettstamp,
 723         .listen            = sock_no_listen,            /* ok           */
 724         .shutdown          = inet_shutdown,             /* ok           */
 725         .setsockopt        = sock_common_setsockopt,    /* ok           */
 726         .getsockopt        = sock_common_getsockopt,    /* ok           */
 727         .sendmsg           = inet6_sendmsg,             /* retpoline's sake */
 728         .recvmsg           = inet6_recvmsg,             /* retpoline's sake */
 729         .mmap              = sock_no_mmap,
 730         .sendpage          = sock_no_sendpage,
 731         .set_peek_off      = sk_set_peek_off,
 732 #ifdef CONFIG_COMPAT
 733         .compat_ioctl      = inet6_compat_ioctl,
 734 #endif
 735 };
 736
 737 static const struct net_proto_family inet6_family_ops = {
 738         .family = PF_INET6,
 739         .create = inet6_create,
 740         .owner  = THIS_MODULE,
 741 };
 742
 743 int inet6_register_protosw(struct inet_protosw *p)
 744 {
 745         struct list_head *lh;
 746         struct inet_protosw *answer;
 747         struct list_head *last_perm;
 748         int protocol = p->protocol;
 749         int ret;
 750
 751         spin_lock_bh(&inetsw6_lock);
 752
 753         ret = -EINVAL;
 754         if (p->type >= SOCK_MAX)
 755                 goto out_illegal;
 756
 757         /* If we are trying to override a permanent protocol, bail. */
 758         answer = NULL;
 759         ret = -EPERM;
 760         last_perm = &inetsw6[p->type];
 761         list_for_each(lh, &inetsw6[p->type]) {
 762                 answer = list_entry(lh, struct inet_protosw, list);
 763
 764                 /* Check only the non-wild match. */
 765                 if (INET_PROTOSW_PERMANENT & answer->flags) {
 766                         if (protocol == answer->protocol)
 767                                 break;
 768                         last_perm = lh;
 769                 }
 770
 771                 answer = NULL;
 772         }
 773         if (answer)
 774                 goto out_permanent;
 775
 776         /* Add the new entry after the last permanent entry if any, so that
 777          * the new entry does not override a permanent entry when matched with
 778          * a wild-card protocol. But it is allowed to override any existing
 779          * non-permanent entry.  This means that when we remove this entry, the
 780          * system automatically returns to the old behavior.
 781          */
 782         list_add_rcu(&p->list, last_perm);
 783         ret = 0;
 784 out:
 785         spin_unlock_bh(&inetsw6_lock);
 786         return ret;
 787
 788 out_permanent:
 789         pr_err("Attempt to override permanent protocol %d\n", protocol);
 790         goto out;
 791
 792 out_illegal:
 793         pr_err("Ignoring attempt to register invalid socket type %d\n",
 794                p->type);
 795         goto out;
 796 }
 797 EXPORT_SYMBOL(inet6_register_protosw);
 798
 799 void
 800 inet6_unregister_protosw(struct inet_protosw *p)
 801 {
 802         if (INET_PROTOSW_PERMANENT & p->flags) {
 803                 pr_err("Attempt to unregister permanent protocol %d\n",
 804                        p->protocol);
 805         } else {
 806                 spin_lock_bh(&inetsw6_lock);
 807                 list_del_rcu(&p->list);
 808                 spin_unlock_bh(&inetsw6_lock);
 809
 810                 synchronize_net();
 811         }
 812 }
 813 EXPORT_SYMBOL(inet6_unregister_protosw);
 814
 815 int inet6_sk_rebuild_header(struct sock *sk)
 816 {
 817         struct ipv6_pinfo *np = inet6_sk(sk);
 818         struct dst_entry *dst;
 819
 820         dst = __sk_dst_check(sk, np->dst_cookie);
 821
 822         if (!dst) {
 823                 struct inet_sock *inet = inet_sk(sk);
 824                 struct in6_addr *final_p, final;
 825                 struct flowi6 fl6;
 826
 827                 memset(&fl6, 0, sizeof(fl6));
 828                 fl6.flowi6_proto = sk->sk_protocol;
 829                 fl6.daddr = sk->sk_v6_daddr;
 830                 fl6.saddr = np->saddr;
 831                 fl6.flowlabel = np->flow_label;
 832                 fl6.flowi6_oif = sk->sk_bound_dev_if;
 833                 fl6.flowi6_mark = sk->sk_mark;
 834                 fl6.fl6_dport = inet->inet_dport;
 835                 fl6.fl6_sport = inet->inet_sport;
 836                 fl6.flowi6_uid = sk->sk_uid;
 837                 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
 838
 839                 rcu_read_lock();
 840                 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
 841                                          &final);
 842                 rcu_read_unlock();
 843
 844                 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
 845                 if (IS_ERR(dst)) {
 846                         sk->sk_route_caps = 0;
 847                         sk->sk_err_soft = -PTR_ERR(dst);
 848                         return PTR_ERR(dst);
 849                 }
 850
 851                 ip6_dst_store(sk, dst, NULL, NULL);
 852         }
 853
 854         return 0;
 855 }
 856 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
 857
 858 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
 859                        const struct inet6_skb_parm *opt)
 860 {
 861         const struct ipv6_pinfo *np = inet6_sk(sk);
 862
 863         if (np->rxopt.all) {
 864                 if (((opt->flags & IP6SKB_HOPBYHOP) &&
 865                      (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
 866                     (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
 867                      np->rxopt.bits.rxflow) ||
 868                     (opt->srcrt && (np->rxopt.bits.srcrt ||
 869                      np->rxopt.bits.osrcrt)) ||
 870                     ((opt->dst1 || opt->dst0) &&
 871                      (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
 872                         return true;
 873         }
 874         return false;
 875 }
 876 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
 877
 878 static struct packet_type ipv6_packet_type __read_mostly = {
 879         .type = cpu_to_be16(ETH_P_IPV6),
 880         .func = ipv6_rcv,
 881         .list_func = ipv6_list_rcv,
 882 };
 883
 884 static int __init ipv6_packet_init(void)
 885 {
 886         dev_add_pack(&ipv6_packet_type);
 887         return 0;
 888 }
 889
 890 static void ipv6_packet_cleanup(void)
 891 {
 892         dev_remove_pack(&ipv6_packet_type);
 893 }
 894
 895 static int __net_init ipv6_init_mibs(struct net *net)
 896 {
 897         int i;
 898
 899         net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
 900         if (!net->mib.udp_stats_in6)
 901                 return -ENOMEM;
 902         net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
 903         if (!net->mib.udplite_stats_in6)
 904                 goto err_udplite_mib;
 905         net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
 906         if (!net->mib.ipv6_statistics)
 907                 goto err_ip_mib;
 908
 909         for_each_possible_cpu(i) {
 910                 struct ipstats_mib *af_inet6_stats;
 911                 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
 912                 u64_stats_init(&af_inet6_stats->syncp);
 913         }
 914
 915
 916         net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
 917         if (!net->mib.icmpv6_statistics)
 918                 goto err_icmp_mib;
 919         net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
 920                                                 GFP_KERNEL);
 921         if (!net->mib.icmpv6msg_statistics)
 922                 goto err_icmpmsg_mib;
 923         return 0;
 924
 925 err_icmpmsg_mib:
 926         free_percpu(net->mib.icmpv6_statistics);
 927 err_icmp_mib:
 928         free_percpu(net->mib.ipv6_statistics);
 929 err_ip_mib:
 930         free_percpu(net->mib.udplite_stats_in6);
 931 err_udplite_mib:
 932         free_percpu(net->mib.udp_stats_in6);
 933         return -ENOMEM;
 934 }
 935
 936 static void ipv6_cleanup_mibs(struct net *net)
 937 {
 938         free_percpu(net->mib.udp_stats_in6);
 939         free_percpu(net->mib.udplite_stats_in6);
 940         free_percpu(net->mib.ipv6_statistics);
 941         free_percpu(net->mib.icmpv6_statistics);
 942         kfree(net->mib.icmpv6msg_statistics);
 943 }
 944
 945 static int __net_init inet6_net_init(struct net *net)
 946 {
 947         int err = 0;
 948
 949         net->ipv6.sysctl.bindv6only = 0;
 950         net->ipv6.sysctl.icmpv6_time = 1*HZ;
 951         net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
 952         net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
 953         net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
 954
 955         /* By default, rate limit error messages.
 956          * Except for pmtu discovery, it would break it.
 957          * proc_do_large_bitmap needs pointer to the bitmap.
 958          */
 959         bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
 960         bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
 961         net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
 962
 963         net->ipv6.sysctl.flowlabel_consistency = 1;
 964         net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
 965         net->ipv6.sysctl.idgen_retries = 3;
 966         net->ipv6.sysctl.idgen_delay = 1 * HZ;
 967         net->ipv6.sysctl.flowlabel_state_ranges = 0;
 968         net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
 969         net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
 970         net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
 971         net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
 972         atomic_set(&net->ipv6.fib6_sernum, 1);
 973
 974         err = ipv6_init_mibs(net);
 975         if (err)
 976                 return err;
 977 #ifdef CONFIG_PROC_FS
 978         err = udp6_proc_init(net);
 979         if (err)
 980                 goto out;
 981         err = tcp6_proc_init(net);
 982         if (err)
 983                 goto proc_tcp6_fail;
 984         err = ac6_proc_init(net);
 985         if (err)
 986                 goto proc_ac6_fail;
 987 #endif
 988         return err;
 989
 990 #ifdef CONFIG_PROC_FS
 991 proc_ac6_fail:
 992         tcp6_proc_exit(net);
 993 proc_tcp6_fail:
 994         udp6_proc_exit(net);
 995 out:
 996         ipv6_cleanup_mibs(net);
 997         return err;
 998 #endif
 999 }
1000
1001 static void __net_exit inet6_net_exit(struct net *net)
1002 {
1003 #ifdef CONFIG_PROC_FS
1004         udp6_proc_exit(net);
1005         tcp6_proc_exit(net);
1006         ac6_proc_exit(net);
1007 #endif
1008         ipv6_cleanup_mibs(net);
1009 }
1010
1011 static struct pernet_operations inet6_net_ops = {
1012         .init = inet6_net_init,
1013         .exit = inet6_net_exit,
1014 };
1015
1016 static int ipv6_route_input(struct sk_buff *skb)
1017 {
1018         ip6_route_input(skb);
1019         return skb_dst(skb)->error;
1020 }
1021
1022 static const struct ipv6_stub ipv6_stub_impl = {
1023         .ipv6_sock_mc_join = ipv6_sock_mc_join,
1024         .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1025         .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1026         .ipv6_route_input  = ipv6_route_input,
1027         .fib6_get_table    = fib6_get_table,
1028         .fib6_table_lookup = fib6_table_lookup,
1029         .fib6_lookup       = fib6_lookup,
1030         .fib6_select_path  = fib6_select_path,
1031         .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1032         .fib6_nh_init      = fib6_nh_init,
1033         .fib6_nh_release   = fib6_nh_release,
1034         .fib6_nh_release_dsts = fib6_nh_release_dsts,
1035         .fib6_update_sernum = fib6_update_sernum_stub,
1036         .fib6_rt_update    = fib6_rt_update,
1037         .ip6_del_rt        = ip6_del_rt,
1038         .udpv6_encap_enable = udpv6_encap_enable,
1039         .ndisc_send_na = ndisc_send_na,
1040 #if IS_ENABLED(CONFIG_XFRM)
1041         .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1042         .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1043         .xfrm6_rcv_encap = xfrm6_rcv_encap,
1044 #endif
1045         .nd_tbl = &nd_tbl,
1046         .ipv6_fragment = ip6_fragment,
1047 };
1048
1049 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1050         .inet6_bind = __inet6_bind,
1051         .udp6_lib_lookup = __udp6_lib_lookup,
1052 };
1053
1054 static int __init inet6_init(void)
1055 {
1056         struct list_head *r;
1057         int err = 0;
1058
1059         sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1060
1061         /* Register the socket-side information for inet6_create.  */
1062         for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1063                 INIT_LIST_HEAD(r);
1064
1065         if (disable_ipv6_mod) {
1066                 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1067                 goto out;
1068         }
1069
1070         err = proto_register(&tcpv6_prot, 1);
1071         if (err)
1072                 goto out;
1073
1074         err = proto_register(&udpv6_prot, 1);
1075         if (err)
1076                 goto out_unregister_tcp_proto;
1077
1078         err = proto_register(&udplitev6_prot, 1);
1079         if (err)
1080                 goto out_unregister_udp_proto;
1081
1082         err = proto_register(&rawv6_prot, 1);
1083         if (err)
1084                 goto out_unregister_udplite_proto;
1085
1086         err = proto_register(&pingv6_prot, 1);
1087         if (err)
1088                 goto out_unregister_raw_proto;
1089
1090         /* We MUST register RAW sockets before we create the ICMP6,
1091          * IGMP6, or NDISC control sockets.
1092          */
1093         err = rawv6_init();
1094         if (err)
1095                 goto out_unregister_ping_proto;
1096
1097         /* Register the family here so that the init calls below will
1098          * be able to create sockets. (?? is this dangerous ??)
1099          */
1100         err = sock_register(&inet6_family_ops);
1101         if (err)
1102                 goto out_sock_register_fail;
1103
1104         /*
1105          *      ipngwg API draft makes clear that the correct semantics
1106          *      for TCP and UDP is to consider one TCP and UDP instance
1107          *      in a host available by both INET and INET6 APIs and
1108          *      able to communicate via both network protocols.
1109          */
1110
1111         err = register_pernet_subsys(&inet6_net_ops);
1112         if (err)
1113                 goto register_pernet_fail;
1114         err = ip6_mr_init();
1115         if (err)
1116                 goto ipmr_fail;
1117         err = icmpv6_init();
1118         if (err)
1119                 goto icmp_fail;
1120         err = ndisc_init();
1121         if (err)
1122                 goto ndisc_fail;
1123         err = igmp6_init();
1124         if (err)
1125                 goto igmp_fail;
1126
1127         err = ipv6_netfilter_init();
1128         if (err)
1129                 goto netfilter_fail;
1130         /* Create /proc/foo6 entries. */
1131 #ifdef CONFIG_PROC_FS
1132         err = -ENOMEM;
1133         if (raw6_proc_init())
1134                 goto proc_raw6_fail;
1135         if (udplite6_proc_init())
1136                 goto proc_udplite6_fail;
1137         if (ipv6_misc_proc_init())
1138                 goto proc_misc6_fail;
1139         if (if6_proc_init())
1140                 goto proc_if6_fail;
1141 #endif
1142         err = ip6_route_init();
1143         if (err)
1144                 goto ip6_route_fail;
1145         err = ndisc_late_init();
1146         if (err)
1147                 goto ndisc_late_fail;
1148         err = ip6_flowlabel_init();
1149         if (err)
1150                 goto ip6_flowlabel_fail;
1151         err = ipv6_anycast_init();
1152         if (err)
1153                 goto ipv6_anycast_fail;
1154         err = addrconf_init();
1155         if (err)
1156                 goto addrconf_fail;
1157
1158         /* Init v6 extension headers. */
1159         err = ipv6_exthdrs_init();
1160         if (err)
1161                 goto ipv6_exthdrs_fail;
1162
1163         err = ipv6_frag_init();
1164         if (err)
1165                 goto ipv6_frag_fail;
1166
1167         /* Init v6 transport protocols. */
1168         err = udpv6_init();
1169         if (err)
1170                 goto udpv6_fail;
1171
1172         err = udplitev6_init();
1173         if (err)
1174                 goto udplitev6_fail;
1175
1176         err = udpv6_offload_init();
1177         if (err)
1178                 goto udpv6_offload_fail;
1179
1180         err = tcpv6_init();
1181         if (err)
1182                 goto tcpv6_fail;
1183
1184         err = ipv6_packet_init();
1185         if (err)
1186                 goto ipv6_packet_fail;
1187
1188         err = pingv6_init();
1189         if (err)
1190                 goto pingv6_fail;
1191
1192         err = calipso_init();
1193         if (err)
1194                 goto calipso_fail;
1195
1196         err = seg6_init();
1197         if (err)
1198                 goto seg6_fail;
1199
1200         err = rpl_init();
1201         if (err)
1202                 goto rpl_fail;
1203
1204         err = igmp6_late_init();
1205         if (err)
1206                 goto igmp6_late_err;
1207
1208 #ifdef CONFIG_SYSCTL
1209         err = ipv6_sysctl_register();
1210         if (err)
1211                 goto sysctl_fail;
1212 #endif
1213
1214         /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1215         wmb();
1216         ipv6_stub = &ipv6_stub_impl;
1217         ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1218 out:
1219         return err;
1220
1221 #ifdef CONFIG_SYSCTL
1222 sysctl_fail:
1223         igmp6_late_cleanup();
1224 #endif
1225 igmp6_late_err:
1226         rpl_exit();
1227 rpl_fail:
1228         seg6_exit();
1229 seg6_fail:
1230         calipso_exit();
1231 calipso_fail:
1232         pingv6_exit();
1233 pingv6_fail:
1234         ipv6_packet_cleanup();
1235 ipv6_packet_fail:
1236         tcpv6_exit();
1237 tcpv6_fail:
1238         udpv6_offload_exit();
1239 udpv6_offload_fail:
1240         udplitev6_exit();
1241 udplitev6_fail:
1242         udpv6_exit();
1243 udpv6_fail:
1244         ipv6_frag_exit();
1245 ipv6_frag_fail:
1246         ipv6_exthdrs_exit();
1247 ipv6_exthdrs_fail:
1248         addrconf_cleanup();
1249 addrconf_fail:
1250         ipv6_anycast_cleanup();
1251 ipv6_anycast_fail:
1252         ip6_flowlabel_cleanup();
1253 ip6_flowlabel_fail:
1254         ndisc_late_cleanup();
1255 ndisc_late_fail:
1256         ip6_route_cleanup();
1257 ip6_route_fail:
1258 #ifdef CONFIG_PROC_FS
1259         if6_proc_exit();
1260 proc_if6_fail:
1261         ipv6_misc_proc_exit();
1262 proc_misc6_fail:
1263         udplite6_proc_exit();
1264 proc_udplite6_fail:
1265         raw6_proc_exit();
1266 proc_raw6_fail:
1267 #endif
1268         ipv6_netfilter_fini();
1269 netfilter_fail:
1270         igmp6_cleanup();
1271 igmp_fail:
1272         ndisc_cleanup();
1273 ndisc_fail:
1274         icmpv6_cleanup();
1275 icmp_fail:
1276         ip6_mr_cleanup();
1277 ipmr_fail:
1278         unregister_pernet_subsys(&inet6_net_ops);
1279 register_pernet_fail:
1280         sock_unregister(PF_INET6);
1281         rtnl_unregister_all(PF_INET6);
1282 out_sock_register_fail:
1283         rawv6_exit();
1284 out_unregister_ping_proto:
1285         proto_unregister(&pingv6_prot);
1286 out_unregister_raw_proto:
1287         proto_unregister(&rawv6_prot);
1288 out_unregister_udplite_proto:
1289         proto_unregister(&udplitev6_prot);
1290 out_unregister_udp_proto:
1291         proto_unregister(&udpv6_prot);
1292 out_unregister_tcp_proto:
1293         proto_unregister(&tcpv6_prot);
1294         goto out;
1295 }
1296 module_init(inet6_init);
1297
1298 MODULE_ALIAS_NETPROTO(PF_INET6);