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 #include <net/ioam6.h> 66 #include <net/rawv6.h> 67 #include <net/rps.h> 68 69 #include <linux/uaccess.h> 70 #include <linux/mroute6.h> 71 72 #include "ip6_offload.h" 73 74 MODULE_AUTHOR("Cast of dozens"); 75 MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); 76 MODULE_LICENSE("GPL"); 77 78 /* The inetsw6 table contains everything that inet6_create needs to 79 * build a new socket. 80 */ 81 static struct list_head inetsw6[SOCK_MAX]; 82 static DEFINE_SPINLOCK(inetsw6_lock); 83 84 struct ipv6_params ipv6_defaults = { 85 .disable_ipv6 = 0, 86 .autoconf = 1, 87 }; 88 89 static int disable_ipv6_mod; 90 91 module_param_named(disable, disable_ipv6_mod, int, 0444); 92 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional"); 93 94 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444); 95 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces"); 96 97 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444); 98 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces"); 99 100 bool ipv6_mod_enabled(void) 101 { 102 return disable_ipv6_mod == 0; 103 } 104 EXPORT_SYMBOL_GPL(ipv6_mod_enabled); 105 106 static struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) 107 { 108 const int offset = sk->sk_prot->ipv6_pinfo_offset; 109 110 return (struct ipv6_pinfo *)(((u8 *)sk) + offset); 111 } 112 113 void inet6_sock_destruct(struct sock *sk) 114 { 115 inet6_cleanup_sock(sk); 116 inet_sock_destruct(sk); 117 } 118 EXPORT_SYMBOL_GPL(inet6_sock_destruct); 119 120 static int inet6_create(struct net *net, struct socket *sock, int protocol, 121 int kern) 122 { 123 struct inet_sock *inet; 124 struct ipv6_pinfo *np; 125 struct sock *sk; 126 struct inet_protosw *answer; 127 struct proto *answer_prot; 128 unsigned char answer_flags; 129 int try_loading_module = 0; 130 int err; 131 132 if (protocol < 0 || protocol >= IPPROTO_MAX) 133 return -EINVAL; 134 135 /* Look for the requested type/protocol pair. */ 136 lookup_protocol: 137 err = -ESOCKTNOSUPPORT; 138 rcu_read_lock(); 139 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { 140 141 err = 0; 142 /* Check the non-wild match. */ 143 if (protocol == answer->protocol) { 144 if (protocol != IPPROTO_IP) 145 break; 146 } else { 147 /* Check for the two wild cases. */ 148 if (IPPROTO_IP == protocol) { 149 protocol = answer->protocol; 150 break; 151 } 152 if (IPPROTO_IP == answer->protocol) 153 break; 154 } 155 err = -EPROTONOSUPPORT; 156 } 157 158 if (err) { 159 if (try_loading_module < 2) { 160 rcu_read_unlock(); 161 /* 162 * Be more specific, e.g. net-pf-10-proto-132-type-1 163 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) 164 */ 165 if (++try_loading_module == 1) 166 request_module("net-pf-%d-proto-%d-type-%d", 167 PF_INET6, protocol, sock->type); 168 /* 169 * Fall back to generic, e.g. net-pf-10-proto-132 170 * (net-pf-PF_INET6-proto-IPPROTO_SCTP) 171 */ 172 else 173 request_module("net-pf-%d-proto-%d", 174 PF_INET6, protocol); 175 goto lookup_protocol; 176 } else 177 goto out_rcu_unlock; 178 } 179 180 err = -EPERM; 181 if (sock->type == SOCK_RAW && !kern && 182 !ns_capable(net->user_ns, CAP_NET_RAW)) 183 goto out_rcu_unlock; 184 185 sock->ops = answer->ops; 186 answer_prot = answer->prot; 187 answer_flags = answer->flags; 188 rcu_read_unlock(); 189 190 WARN_ON(!answer_prot->slab); 191 192 err = -ENOBUFS; 193 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern); 194 if (!sk) 195 goto out; 196 197 sock_init_data(sock, sk); 198 199 err = 0; 200 if (INET_PROTOSW_REUSE & answer_flags) 201 sk->sk_reuse = SK_CAN_REUSE; 202 203 if (INET_PROTOSW_ICSK & answer_flags) 204 inet_init_csk_locks(sk); 205 206 inet = inet_sk(sk); 207 inet_assign_bit(IS_ICSK, sk, INET_PROTOSW_ICSK & answer_flags); 208 209 if (SOCK_RAW == sock->type) { 210 inet->inet_num = protocol; 211 if (IPPROTO_RAW == protocol) 212 inet_set_bit(HDRINCL, sk); 213 } 214 215 sk->sk_destruct = inet6_sock_destruct; 216 sk->sk_family = PF_INET6; 217 sk->sk_protocol = protocol; 218 219 sk->sk_backlog_rcv = answer->prot->backlog_rcv; 220 221 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); 222 np->hop_limit = -1; 223 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; 224 inet6_set_bit(MC6_LOOP, sk); 225 inet6_set_bit(MC6_ALL, sk); 226 np->pmtudisc = IPV6_PMTUDISC_WANT; 227 inet6_assign_bit(REPFLOW, sk, net->ipv6.sysctl.flowlabel_reflect & 228 FLOWLABEL_REFLECT_ESTABLISHED); 229 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only; 230 sk->sk_txrehash = READ_ONCE(net->core.sysctl_txrehash); 231 232 /* Init the ipv4 part of the socket since we can have sockets 233 * using v6 API for ipv4. 234 */ 235 inet->uc_ttl = -1; 236 237 inet_set_bit(MC_LOOP, sk); 238 inet->mc_ttl = 1; 239 inet->mc_index = 0; 240 RCU_INIT_POINTER(inet->mc_list, NULL); 241 inet->rcv_tos = 0; 242 243 if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc)) 244 inet->pmtudisc = IP_PMTUDISC_DONT; 245 else 246 inet->pmtudisc = IP_PMTUDISC_WANT; 247 248 if (inet->inet_num) { 249 /* It assumes that any protocol which allows 250 * the user to assign a number at socket 251 * creation time automatically shares. 252 */ 253 inet->inet_sport = htons(inet->inet_num); 254 err = sk->sk_prot->hash(sk); 255 if (err) 256 goto out_sk_release; 257 } 258 if (sk->sk_prot->init) { 259 err = sk->sk_prot->init(sk); 260 if (err) 261 goto out_sk_release; 262 } 263 264 if (!kern) { 265 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk); 266 if (err) 267 goto out_sk_release; 268 } 269 out: 270 return err; 271 out_rcu_unlock: 272 rcu_read_unlock(); 273 goto out; 274 out_sk_release: 275 sk_common_release(sk); 276 sock->sk = NULL; 277 goto out; 278 } 279 280 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len, 281 u32 flags) 282 { 283 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr; 284 struct inet_sock *inet = inet_sk(sk); 285 struct ipv6_pinfo *np = inet6_sk(sk); 286 struct net *net = sock_net(sk); 287 __be32 v4addr = 0; 288 unsigned short snum; 289 bool saved_ipv6only; 290 int addr_type = 0; 291 int err = 0; 292 293 if (addr->sin6_family != AF_INET6) 294 return -EAFNOSUPPORT; 295 296 addr_type = ipv6_addr_type(&addr->sin6_addr); 297 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM) 298 return -EINVAL; 299 300 snum = ntohs(addr->sin6_port); 301 if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) && 302 snum && inet_port_requires_bind_service(net, snum) && 303 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) 304 return -EACCES; 305 306 if (flags & BIND_WITH_LOCK) 307 lock_sock(sk); 308 309 /* Check these errors (active socket, double bind). */ 310 if (sk->sk_state != TCP_CLOSE || inet->inet_num) { 311 err = -EINVAL; 312 goto out; 313 } 314 315 /* Check if the address belongs to the host. */ 316 if (addr_type == IPV6_ADDR_MAPPED) { 317 struct net_device *dev = NULL; 318 int chk_addr_ret; 319 320 /* Binding to v4-mapped address on a v6-only socket 321 * makes no sense 322 */ 323 if (ipv6_only_sock(sk)) { 324 err = -EINVAL; 325 goto out; 326 } 327 328 rcu_read_lock(); 329 if (sk->sk_bound_dev_if) { 330 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); 331 if (!dev) { 332 err = -ENODEV; 333 goto out_unlock; 334 } 335 } 336 337 /* Reproduce AF_INET checks to make the bindings consistent */ 338 v4addr = addr->sin6_addr.s6_addr32[3]; 339 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr); 340 rcu_read_unlock(); 341 342 if (!inet_addr_valid_or_nonlocal(net, inet, v4addr, 343 chk_addr_ret)) { 344 err = -EADDRNOTAVAIL; 345 goto out; 346 } 347 } else { 348 if (addr_type != IPV6_ADDR_ANY) { 349 struct net_device *dev = NULL; 350 351 rcu_read_lock(); 352 if (__ipv6_addr_needs_scope_id(addr_type)) { 353 if (addr_len >= sizeof(struct sockaddr_in6) && 354 addr->sin6_scope_id) { 355 /* Override any existing binding, if another one 356 * is supplied by user. 357 */ 358 sk->sk_bound_dev_if = addr->sin6_scope_id; 359 } 360 361 /* Binding to link-local address requires an interface */ 362 if (!sk->sk_bound_dev_if) { 363 err = -EINVAL; 364 goto out_unlock; 365 } 366 } 367 368 if (sk->sk_bound_dev_if) { 369 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); 370 if (!dev) { 371 err = -ENODEV; 372 goto out_unlock; 373 } 374 } 375 376 /* ipv4 addr of the socket is invalid. Only the 377 * unspecified and mapped address have a v4 equivalent. 378 */ 379 v4addr = LOOPBACK4_IPV6; 380 if (!(addr_type & IPV6_ADDR_MULTICAST)) { 381 if (!ipv6_can_nonlocal_bind(net, inet) && 382 !ipv6_chk_addr(net, &addr->sin6_addr, 383 dev, 0)) { 384 err = -EADDRNOTAVAIL; 385 goto out_unlock; 386 } 387 } 388 rcu_read_unlock(); 389 } 390 } 391 392 inet->inet_rcv_saddr = v4addr; 393 inet->inet_saddr = v4addr; 394 395 sk->sk_v6_rcv_saddr = addr->sin6_addr; 396 397 if (!(addr_type & IPV6_ADDR_MULTICAST)) 398 np->saddr = addr->sin6_addr; 399 400 saved_ipv6only = sk->sk_ipv6only; 401 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED) 402 sk->sk_ipv6only = 1; 403 404 /* Make sure we are allowed to bind here. */ 405 if (snum || !(inet_test_bit(BIND_ADDRESS_NO_PORT, sk) || 406 (flags & BIND_FORCE_ADDRESS_NO_PORT))) { 407 err = sk->sk_prot->get_port(sk, snum); 408 if (err) { 409 sk->sk_ipv6only = saved_ipv6only; 410 inet_reset_saddr(sk); 411 goto out; 412 } 413 if (!(flags & BIND_FROM_BPF)) { 414 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk); 415 if (err) { 416 sk->sk_ipv6only = saved_ipv6only; 417 inet_reset_saddr(sk); 418 if (sk->sk_prot->put_port) 419 sk->sk_prot->put_port(sk); 420 goto out; 421 } 422 } 423 } 424 425 if (addr_type != IPV6_ADDR_ANY) 426 sk->sk_userlocks |= SOCK_BINDADDR_LOCK; 427 if (snum) 428 sk->sk_userlocks |= SOCK_BINDPORT_LOCK; 429 inet->inet_sport = htons(inet->inet_num); 430 inet->inet_dport = 0; 431 inet->inet_daddr = 0; 432 out: 433 if (flags & BIND_WITH_LOCK) 434 release_sock(sk); 435 return err; 436 out_unlock: 437 rcu_read_unlock(); 438 goto out; 439 } 440 441 int inet6_bind_sk(struct sock *sk, struct sockaddr *uaddr, int addr_len) 442 { 443 u32 flags = BIND_WITH_LOCK; 444 const struct proto *prot; 445 int err = 0; 446 447 /* IPV6_ADDRFORM can change sk->sk_prot under us. */ 448 prot = READ_ONCE(sk->sk_prot); 449 /* If the socket has its own bind function then use it. */ 450 if (prot->bind) 451 return prot->bind(sk, uaddr, addr_len); 452 453 if (addr_len < SIN6_LEN_RFC2133) 454 return -EINVAL; 455 456 /* BPF prog is run before any checks are done so that if the prog 457 * changes context in a wrong way it will be caught. 458 */ 459 err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, &addr_len, 460 CGROUP_INET6_BIND, &flags); 461 if (err) 462 return err; 463 464 return __inet6_bind(sk, uaddr, addr_len, flags); 465 } 466 467 /* bind for INET6 API */ 468 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 469 { 470 return inet6_bind_sk(sock->sk, uaddr, addr_len); 471 } 472 EXPORT_SYMBOL(inet6_bind); 473 474 int inet6_release(struct socket *sock) 475 { 476 struct sock *sk = sock->sk; 477 478 if (!sk) 479 return -EINVAL; 480 481 /* Free mc lists */ 482 ipv6_sock_mc_close(sk); 483 484 /* Free ac lists */ 485 ipv6_sock_ac_close(sk); 486 487 return inet_release(sock); 488 } 489 EXPORT_SYMBOL(inet6_release); 490 491 void inet6_cleanup_sock(struct sock *sk) 492 { 493 struct ipv6_pinfo *np = inet6_sk(sk); 494 struct sk_buff *skb; 495 struct ipv6_txoptions *opt; 496 497 /* Release rx options */ 498 499 skb = xchg(&np->pktoptions, NULL); 500 kfree_skb(skb); 501 502 skb = xchg(&np->rxpmtu, NULL); 503 kfree_skb(skb); 504 505 /* Free flowlabels */ 506 fl6_free_socklist(sk); 507 508 /* Free tx options */ 509 510 opt = unrcu_pointer(xchg(&np->opt, NULL)); 511 if (opt) { 512 atomic_sub(opt->tot_len, &sk->sk_omem_alloc); 513 txopt_put(opt); 514 } 515 } 516 EXPORT_SYMBOL_GPL(inet6_cleanup_sock); 517 518 /* 519 * This does both peername and sockname. 520 */ 521 int inet6_getname(struct socket *sock, struct sockaddr *uaddr, 522 int peer) 523 { 524 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr; 525 int sin_addr_len = sizeof(*sin); 526 struct sock *sk = sock->sk; 527 struct inet_sock *inet = inet_sk(sk); 528 struct ipv6_pinfo *np = inet6_sk(sk); 529 530 sin->sin6_family = AF_INET6; 531 sin->sin6_flowinfo = 0; 532 sin->sin6_scope_id = 0; 533 lock_sock(sk); 534 if (peer) { 535 if (!inet->inet_dport || 536 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && 537 peer == 1)) { 538 release_sock(sk); 539 return -ENOTCONN; 540 } 541 sin->sin6_port = inet->inet_dport; 542 sin->sin6_addr = sk->sk_v6_daddr; 543 if (inet6_test_bit(SNDFLOW, sk)) 544 sin->sin6_flowinfo = np->flow_label; 545 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len, 546 CGROUP_INET6_GETPEERNAME); 547 } else { 548 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) 549 sin->sin6_addr = np->saddr; 550 else 551 sin->sin6_addr = sk->sk_v6_rcv_saddr; 552 sin->sin6_port = inet->inet_sport; 553 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len, 554 CGROUP_INET6_GETSOCKNAME); 555 } 556 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr, 557 sk->sk_bound_dev_if); 558 release_sock(sk); 559 return sin_addr_len; 560 } 561 EXPORT_SYMBOL(inet6_getname); 562 563 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 564 { 565 void __user *argp = (void __user *)arg; 566 struct sock *sk = sock->sk; 567 struct net *net = sock_net(sk); 568 const struct proto *prot; 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 /* IPV6_ADDRFORM can change sk->sk_prot under us. */ 587 prot = READ_ONCE(sk->sk_prot); 588 if (!prot->ioctl) 589 return -ENOIOCTLCMD; 590 return sk_ioctl(sk, cmd, (void __user *)arg); 591 } 592 /*NOTREACHED*/ 593 return 0; 594 } 595 EXPORT_SYMBOL(inet6_ioctl); 596 597 #ifdef CONFIG_COMPAT 598 struct compat_in6_rtmsg { 599 struct in6_addr rtmsg_dst; 600 struct in6_addr rtmsg_src; 601 struct in6_addr rtmsg_gateway; 602 u32 rtmsg_type; 603 u16 rtmsg_dst_len; 604 u16 rtmsg_src_len; 605 u32 rtmsg_metric; 606 u32 rtmsg_info; 607 u32 rtmsg_flags; 608 s32 rtmsg_ifindex; 609 }; 610 611 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd, 612 struct compat_in6_rtmsg __user *ur) 613 { 614 struct in6_rtmsg rt; 615 616 if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst, 617 3 * sizeof(struct in6_addr)) || 618 get_user(rt.rtmsg_type, &ur->rtmsg_type) || 619 get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) || 620 get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) || 621 get_user(rt.rtmsg_metric, &ur->rtmsg_metric) || 622 get_user(rt.rtmsg_info, &ur->rtmsg_info) || 623 get_user(rt.rtmsg_flags, &ur->rtmsg_flags) || 624 get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex)) 625 return -EFAULT; 626 627 628 return ipv6_route_ioctl(sock_net(sk), cmd, &rt); 629 } 630 631 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 632 { 633 void __user *argp = compat_ptr(arg); 634 struct sock *sk = sock->sk; 635 636 switch (cmd) { 637 case SIOCADDRT: 638 case SIOCDELRT: 639 return inet6_compat_routing_ioctl(sk, cmd, argp); 640 default: 641 return -ENOIOCTLCMD; 642 } 643 } 644 EXPORT_SYMBOL_GPL(inet6_compat_ioctl); 645 #endif /* CONFIG_COMPAT */ 646 647 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *, 648 size_t)); 649 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) 650 { 651 struct sock *sk = sock->sk; 652 const struct proto *prot; 653 654 if (unlikely(inet_send_prepare(sk))) 655 return -EAGAIN; 656 657 /* IPV6_ADDRFORM can change sk->sk_prot under us. */ 658 prot = READ_ONCE(sk->sk_prot); 659 return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg, 660 sk, msg, size); 661 } 662 663 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *, 664 size_t, int, int *)); 665 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, 666 int flags) 667 { 668 struct sock *sk = sock->sk; 669 const struct proto *prot; 670 int addr_len = 0; 671 int err; 672 673 if (likely(!(flags & MSG_ERRQUEUE))) 674 sock_rps_record_flow(sk); 675 676 /* IPV6_ADDRFORM can change sk->sk_prot under us. */ 677 prot = READ_ONCE(sk->sk_prot); 678 err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg, 679 sk, msg, size, flags, &addr_len); 680 if (err >= 0) 681 msg->msg_namelen = addr_len; 682 return err; 683 } 684 685 const struct proto_ops inet6_stream_ops = { 686 .family = PF_INET6, 687 .owner = THIS_MODULE, 688 .release = inet6_release, 689 .bind = inet6_bind, 690 .connect = inet_stream_connect, /* ok */ 691 .socketpair = sock_no_socketpair, /* a do nothing */ 692 .accept = inet_accept, /* ok */ 693 .getname = inet6_getname, 694 .poll = tcp_poll, /* ok */ 695 .ioctl = inet6_ioctl, /* must change */ 696 .gettstamp = sock_gettstamp, 697 .listen = inet_listen, /* ok */ 698 .shutdown = inet_shutdown, /* ok */ 699 .setsockopt = sock_common_setsockopt, /* ok */ 700 .getsockopt = sock_common_getsockopt, /* ok */ 701 .sendmsg = inet6_sendmsg, /* retpoline's sake */ 702 .recvmsg = inet6_recvmsg, /* retpoline's sake */ 703 #ifdef CONFIG_MMU 704 .mmap = tcp_mmap, 705 #endif 706 .splice_eof = inet_splice_eof, 707 .sendmsg_locked = tcp_sendmsg_locked, 708 .splice_read = tcp_splice_read, 709 .set_peek_off = sk_set_peek_off, 710 .read_sock = tcp_read_sock, 711 .read_skb = tcp_read_skb, 712 .peek_len = tcp_peek_len, 713 #ifdef CONFIG_COMPAT 714 .compat_ioctl = inet6_compat_ioctl, 715 #endif 716 .set_rcvlowat = tcp_set_rcvlowat, 717 }; 718 719 const struct proto_ops inet6_dgram_ops = { 720 .family = PF_INET6, 721 .owner = THIS_MODULE, 722 .release = inet6_release, 723 .bind = inet6_bind, 724 .connect = inet_dgram_connect, /* ok */ 725 .socketpair = sock_no_socketpair, /* a do nothing */ 726 .accept = sock_no_accept, /* a do nothing */ 727 .getname = inet6_getname, 728 .poll = udp_poll, /* ok */ 729 .ioctl = inet6_ioctl, /* must change */ 730 .gettstamp = sock_gettstamp, 731 .listen = sock_no_listen, /* ok */ 732 .shutdown = inet_shutdown, /* ok */ 733 .setsockopt = sock_common_setsockopt, /* ok */ 734 .getsockopt = sock_common_getsockopt, /* ok */ 735 .sendmsg = inet6_sendmsg, /* retpoline's sake */ 736 .recvmsg = inet6_recvmsg, /* retpoline's sake */ 737 .read_skb = udp_read_skb, 738 .mmap = sock_no_mmap, 739 .set_peek_off = udp_set_peek_off, 740 #ifdef CONFIG_COMPAT 741 .compat_ioctl = inet6_compat_ioctl, 742 #endif 743 }; 744 745 static const struct net_proto_family inet6_family_ops = { 746 .family = PF_INET6, 747 .create = inet6_create, 748 .owner = THIS_MODULE, 749 }; 750 751 int inet6_register_protosw(struct inet_protosw *p) 752 { 753 struct list_head *lh; 754 struct inet_protosw *answer; 755 struct list_head *last_perm; 756 int protocol = p->protocol; 757 int ret; 758 759 spin_lock_bh(&inetsw6_lock); 760 761 ret = -EINVAL; 762 if (p->type >= SOCK_MAX) 763 goto out_illegal; 764 765 /* If we are trying to override a permanent protocol, bail. */ 766 answer = NULL; 767 ret = -EPERM; 768 last_perm = &inetsw6[p->type]; 769 list_for_each(lh, &inetsw6[p->type]) { 770 answer = list_entry(lh, struct inet_protosw, list); 771 772 /* Check only the non-wild match. */ 773 if (INET_PROTOSW_PERMANENT & answer->flags) { 774 if (protocol == answer->protocol) 775 break; 776 last_perm = lh; 777 } 778 779 answer = NULL; 780 } 781 if (answer) 782 goto out_permanent; 783 784 /* Add the new entry after the last permanent entry if any, so that 785 * the new entry does not override a permanent entry when matched with 786 * a wild-card protocol. But it is allowed to override any existing 787 * non-permanent entry. This means that when we remove this entry, the 788 * system automatically returns to the old behavior. 789 */ 790 list_add_rcu(&p->list, last_perm); 791 ret = 0; 792 out: 793 spin_unlock_bh(&inetsw6_lock); 794 return ret; 795 796 out_permanent: 797 pr_err("Attempt to override permanent protocol %d\n", protocol); 798 goto out; 799 800 out_illegal: 801 pr_err("Ignoring attempt to register invalid socket type %d\n", 802 p->type); 803 goto out; 804 } 805 EXPORT_SYMBOL(inet6_register_protosw); 806 807 void 808 inet6_unregister_protosw(struct inet_protosw *p) 809 { 810 if (INET_PROTOSW_PERMANENT & p->flags) { 811 pr_err("Attempt to unregister permanent protocol %d\n", 812 p->protocol); 813 } else { 814 spin_lock_bh(&inetsw6_lock); 815 list_del_rcu(&p->list); 816 spin_unlock_bh(&inetsw6_lock); 817 818 synchronize_net(); 819 } 820 } 821 EXPORT_SYMBOL(inet6_unregister_protosw); 822 823 int inet6_sk_rebuild_header(struct sock *sk) 824 { 825 struct ipv6_pinfo *np = inet6_sk(sk); 826 struct dst_entry *dst; 827 828 dst = __sk_dst_check(sk, np->dst_cookie); 829 830 if (!dst) { 831 struct inet_sock *inet = inet_sk(sk); 832 struct in6_addr *final_p, final; 833 struct flowi6 fl6; 834 835 memset(&fl6, 0, sizeof(fl6)); 836 fl6.flowi6_proto = sk->sk_protocol; 837 fl6.daddr = sk->sk_v6_daddr; 838 fl6.saddr = np->saddr; 839 fl6.flowlabel = np->flow_label; 840 fl6.flowi6_oif = sk->sk_bound_dev_if; 841 fl6.flowi6_mark = sk->sk_mark; 842 fl6.fl6_dport = inet->inet_dport; 843 fl6.fl6_sport = inet->inet_sport; 844 fl6.flowi6_uid = sk->sk_uid; 845 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6)); 846 847 rcu_read_lock(); 848 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt), 849 &final); 850 rcu_read_unlock(); 851 852 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p); 853 if (IS_ERR(dst)) { 854 sk->sk_route_caps = 0; 855 WRITE_ONCE(sk->sk_err_soft, -PTR_ERR(dst)); 856 return PTR_ERR(dst); 857 } 858 859 ip6_dst_store(sk, dst, NULL, NULL); 860 } 861 862 return 0; 863 } 864 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); 865 866 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, 867 const struct inet6_skb_parm *opt) 868 { 869 const struct ipv6_pinfo *np = inet6_sk(sk); 870 871 if (np->rxopt.all) { 872 if (((opt->flags & IP6SKB_HOPBYHOP) && 873 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) || 874 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) && 875 np->rxopt.bits.rxflow) || 876 (opt->srcrt && (np->rxopt.bits.srcrt || 877 np->rxopt.bits.osrcrt)) || 878 ((opt->dst1 || opt->dst0) && 879 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) 880 return true; 881 } 882 return false; 883 } 884 885 static struct packet_type ipv6_packet_type __read_mostly = { 886 .type = cpu_to_be16(ETH_P_IPV6), 887 .func = ipv6_rcv, 888 .list_func = ipv6_list_rcv, 889 }; 890 891 static int __init ipv6_packet_init(void) 892 { 893 dev_add_pack(&ipv6_packet_type); 894 return 0; 895 } 896 897 static void ipv6_packet_cleanup(void) 898 { 899 dev_remove_pack(&ipv6_packet_type); 900 } 901 902 static int __net_init ipv6_init_mibs(struct net *net) 903 { 904 int i; 905 906 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib); 907 if (!net->mib.udp_stats_in6) 908 return -ENOMEM; 909 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib); 910 if (!net->mib.udplite_stats_in6) 911 goto err_udplite_mib; 912 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib); 913 if (!net->mib.ipv6_statistics) 914 goto err_ip_mib; 915 916 for_each_possible_cpu(i) { 917 struct ipstats_mib *af_inet6_stats; 918 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i); 919 u64_stats_init(&af_inet6_stats->syncp); 920 } 921 922 923 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib); 924 if (!net->mib.icmpv6_statistics) 925 goto err_icmp_mib; 926 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib), 927 GFP_KERNEL); 928 if (!net->mib.icmpv6msg_statistics) 929 goto err_icmpmsg_mib; 930 return 0; 931 932 err_icmpmsg_mib: 933 free_percpu(net->mib.icmpv6_statistics); 934 err_icmp_mib: 935 free_percpu(net->mib.ipv6_statistics); 936 err_ip_mib: 937 free_percpu(net->mib.udplite_stats_in6); 938 err_udplite_mib: 939 free_percpu(net->mib.udp_stats_in6); 940 return -ENOMEM; 941 } 942 943 static void ipv6_cleanup_mibs(struct net *net) 944 { 945 free_percpu(net->mib.udp_stats_in6); 946 free_percpu(net->mib.udplite_stats_in6); 947 free_percpu(net->mib.ipv6_statistics); 948 free_percpu(net->mib.icmpv6_statistics); 949 kfree(net->mib.icmpv6msg_statistics); 950 } 951 952 static int __net_init inet6_net_init(struct net *net) 953 { 954 int err = 0; 955 956 net->ipv6.sysctl.bindv6only = 0; 957 net->ipv6.sysctl.icmpv6_time = 1*HZ; 958 net->ipv6.sysctl.icmpv6_echo_ignore_all = 0; 959 net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0; 960 net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0; 961 net->ipv6.sysctl.icmpv6_error_anycast_as_unicast = 0; 962 963 /* By default, rate limit error messages. 964 * Except for pmtu discovery, it would break it. 965 * proc_do_large_bitmap needs pointer to the bitmap. 966 */ 967 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1); 968 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1); 969 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask; 970 971 net->ipv6.sysctl.flowlabel_consistency = 1; 972 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS; 973 net->ipv6.sysctl.idgen_retries = 3; 974 net->ipv6.sysctl.idgen_delay = 1 * HZ; 975 net->ipv6.sysctl.flowlabel_state_ranges = 0; 976 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT; 977 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT; 978 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN; 979 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN; 980 net->ipv6.sysctl.fib_notify_on_flag_change = 0; 981 atomic_set(&net->ipv6.fib6_sernum, 1); 982 983 net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID; 984 net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE; 985 986 err = ipv6_init_mibs(net); 987 if (err) 988 return err; 989 #ifdef CONFIG_PROC_FS 990 err = udp6_proc_init(net); 991 if (err) 992 goto out; 993 err = tcp6_proc_init(net); 994 if (err) 995 goto proc_tcp6_fail; 996 err = ac6_proc_init(net); 997 if (err) 998 goto proc_ac6_fail; 999 #endif 1000 return err; 1001 1002 #ifdef CONFIG_PROC_FS 1003 proc_ac6_fail: 1004 tcp6_proc_exit(net); 1005 proc_tcp6_fail: 1006 udp6_proc_exit(net); 1007 out: 1008 ipv6_cleanup_mibs(net); 1009 return err; 1010 #endif 1011 } 1012 1013 static void __net_exit inet6_net_exit(struct net *net) 1014 { 1015 #ifdef CONFIG_PROC_FS 1016 udp6_proc_exit(net); 1017 tcp6_proc_exit(net); 1018 ac6_proc_exit(net); 1019 #endif 1020 ipv6_cleanup_mibs(net); 1021 } 1022 1023 static struct pernet_operations inet6_net_ops = { 1024 .init = inet6_net_init, 1025 .exit = inet6_net_exit, 1026 }; 1027 1028 static int ipv6_route_input(struct sk_buff *skb) 1029 { 1030 ip6_route_input(skb); 1031 return skb_dst(skb)->error; 1032 } 1033 1034 static const struct ipv6_stub ipv6_stub_impl = { 1035 .ipv6_sock_mc_join = ipv6_sock_mc_join, 1036 .ipv6_sock_mc_drop = ipv6_sock_mc_drop, 1037 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow, 1038 .ipv6_route_input = ipv6_route_input, 1039 .fib6_get_table = fib6_get_table, 1040 .fib6_table_lookup = fib6_table_lookup, 1041 .fib6_lookup = fib6_lookup, 1042 .fib6_select_path = fib6_select_path, 1043 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6, 1044 .fib6_nh_init = fib6_nh_init, 1045 .fib6_nh_release = fib6_nh_release, 1046 .fib6_nh_release_dsts = fib6_nh_release_dsts, 1047 .fib6_update_sernum = fib6_update_sernum_stub, 1048 .fib6_rt_update = fib6_rt_update, 1049 .ip6_del_rt = ip6_del_rt, 1050 .udpv6_encap_enable = udpv6_encap_enable, 1051 .ndisc_send_na = ndisc_send_na, 1052 #if IS_ENABLED(CONFIG_XFRM) 1053 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu, 1054 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv, 1055 .xfrm6_gro_udp_encap_rcv = xfrm6_gro_udp_encap_rcv, 1056 .xfrm6_rcv_encap = xfrm6_rcv_encap, 1057 #endif 1058 .nd_tbl = &nd_tbl, 1059 .ipv6_fragment = ip6_fragment, 1060 .ipv6_dev_find = ipv6_dev_find, 1061 .ip6_xmit = ip6_xmit, 1062 }; 1063 1064 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = { 1065 .inet6_bind = __inet6_bind, 1066 .udp6_lib_lookup = __udp6_lib_lookup, 1067 .ipv6_setsockopt = do_ipv6_setsockopt, 1068 .ipv6_getsockopt = do_ipv6_getsockopt, 1069 .ipv6_dev_get_saddr = ipv6_dev_get_saddr, 1070 }; 1071 1072 static int __init inet6_init(void) 1073 { 1074 struct list_head *r; 1075 int err = 0; 1076 1077 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm)); 1078 1079 /* Register the socket-side information for inet6_create. */ 1080 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) 1081 INIT_LIST_HEAD(r); 1082 1083 raw_hashinfo_init(&raw_v6_hashinfo); 1084 1085 if (disable_ipv6_mod) { 1086 pr_info("Loaded, but administratively disabled, reboot required to enable\n"); 1087 goto out; 1088 } 1089 1090 err = proto_register(&tcpv6_prot, 1); 1091 if (err) 1092 goto out; 1093 1094 err = proto_register(&udpv6_prot, 1); 1095 if (err) 1096 goto out_unregister_tcp_proto; 1097 1098 err = proto_register(&udplitev6_prot, 1); 1099 if (err) 1100 goto out_unregister_udp_proto; 1101 1102 err = proto_register(&rawv6_prot, 1); 1103 if (err) 1104 goto out_unregister_udplite_proto; 1105 1106 err = proto_register(&pingv6_prot, 1); 1107 if (err) 1108 goto out_unregister_raw_proto; 1109 1110 /* We MUST register RAW sockets before we create the ICMP6, 1111 * IGMP6, or NDISC control sockets. 1112 */ 1113 err = rawv6_init(); 1114 if (err) 1115 goto out_unregister_ping_proto; 1116 1117 /* Register the family here so that the init calls below will 1118 * be able to create sockets. (?? is this dangerous ??) 1119 */ 1120 err = sock_register(&inet6_family_ops); 1121 if (err) 1122 goto out_sock_register_fail; 1123 1124 /* 1125 * ipngwg API draft makes clear that the correct semantics 1126 * for TCP and UDP is to consider one TCP and UDP instance 1127 * in a host available by both INET and INET6 APIs and 1128 * able to communicate via both network protocols. 1129 */ 1130 1131 err = register_pernet_subsys(&inet6_net_ops); 1132 if (err) 1133 goto register_pernet_fail; 1134 err = ip6_mr_init(); 1135 if (err) 1136 goto ipmr_fail; 1137 err = icmpv6_init(); 1138 if (err) 1139 goto icmp_fail; 1140 err = ndisc_init(); 1141 if (err) 1142 goto ndisc_fail; 1143 err = igmp6_init(); 1144 if (err) 1145 goto igmp_fail; 1146 1147 err = ipv6_netfilter_init(); 1148 if (err) 1149 goto netfilter_fail; 1150 /* Create /proc/foo6 entries. */ 1151 #ifdef CONFIG_PROC_FS 1152 err = -ENOMEM; 1153 if (raw6_proc_init()) 1154 goto proc_raw6_fail; 1155 if (udplite6_proc_init()) 1156 goto proc_udplite6_fail; 1157 if (ipv6_misc_proc_init()) 1158 goto proc_misc6_fail; 1159 if (if6_proc_init()) 1160 goto proc_if6_fail; 1161 #endif 1162 err = ip6_route_init(); 1163 if (err) 1164 goto ip6_route_fail; 1165 err = ndisc_late_init(); 1166 if (err) 1167 goto ndisc_late_fail; 1168 err = ip6_flowlabel_init(); 1169 if (err) 1170 goto ip6_flowlabel_fail; 1171 err = ipv6_anycast_init(); 1172 if (err) 1173 goto ipv6_anycast_fail; 1174 err = addrconf_init(); 1175 if (err) 1176 goto addrconf_fail; 1177 1178 /* Init v6 extension headers. */ 1179 err = ipv6_exthdrs_init(); 1180 if (err) 1181 goto ipv6_exthdrs_fail; 1182 1183 err = ipv6_frag_init(); 1184 if (err) 1185 goto ipv6_frag_fail; 1186 1187 /* Init v6 transport protocols. */ 1188 err = udpv6_init(); 1189 if (err) 1190 goto udpv6_fail; 1191 1192 err = udplitev6_init(); 1193 if (err) 1194 goto udplitev6_fail; 1195 1196 err = udpv6_offload_init(); 1197 if (err) 1198 goto udpv6_offload_fail; 1199 1200 err = tcpv6_init(); 1201 if (err) 1202 goto tcpv6_fail; 1203 1204 err = ipv6_packet_init(); 1205 if (err) 1206 goto ipv6_packet_fail; 1207 1208 err = pingv6_init(); 1209 if (err) 1210 goto pingv6_fail; 1211 1212 err = calipso_init(); 1213 if (err) 1214 goto calipso_fail; 1215 1216 err = seg6_init(); 1217 if (err) 1218 goto seg6_fail; 1219 1220 err = rpl_init(); 1221 if (err) 1222 goto rpl_fail; 1223 1224 err = ioam6_init(); 1225 if (err) 1226 goto ioam6_fail; 1227 1228 err = igmp6_late_init(); 1229 if (err) 1230 goto igmp6_late_err; 1231 1232 #ifdef CONFIG_SYSCTL 1233 err = ipv6_sysctl_register(); 1234 if (err) 1235 goto sysctl_fail; 1236 #endif 1237 1238 /* ensure that ipv6 stubs are visible only after ipv6 is ready */ 1239 wmb(); 1240 ipv6_stub = &ipv6_stub_impl; 1241 ipv6_bpf_stub = &ipv6_bpf_stub_impl; 1242 out: 1243 return err; 1244 1245 #ifdef CONFIG_SYSCTL 1246 sysctl_fail: 1247 igmp6_late_cleanup(); 1248 #endif 1249 igmp6_late_err: 1250 ioam6_exit(); 1251 ioam6_fail: 1252 rpl_exit(); 1253 rpl_fail: 1254 seg6_exit(); 1255 seg6_fail: 1256 calipso_exit(); 1257 calipso_fail: 1258 pingv6_exit(); 1259 pingv6_fail: 1260 ipv6_packet_cleanup(); 1261 ipv6_packet_fail: 1262 tcpv6_exit(); 1263 tcpv6_fail: 1264 udpv6_offload_exit(); 1265 udpv6_offload_fail: 1266 udplitev6_exit(); 1267 udplitev6_fail: 1268 udpv6_exit(); 1269 udpv6_fail: 1270 ipv6_frag_exit(); 1271 ipv6_frag_fail: 1272 ipv6_exthdrs_exit(); 1273 ipv6_exthdrs_fail: 1274 addrconf_cleanup(); 1275 addrconf_fail: 1276 ipv6_anycast_cleanup(); 1277 ipv6_anycast_fail: 1278 ip6_flowlabel_cleanup(); 1279 ip6_flowlabel_fail: 1280 ndisc_late_cleanup(); 1281 ndisc_late_fail: 1282 ip6_route_cleanup(); 1283 ip6_route_fail: 1284 #ifdef CONFIG_PROC_FS 1285 if6_proc_exit(); 1286 proc_if6_fail: 1287 ipv6_misc_proc_exit(); 1288 proc_misc6_fail: 1289 udplite6_proc_exit(); 1290 proc_udplite6_fail: 1291 raw6_proc_exit(); 1292 proc_raw6_fail: 1293 #endif 1294 ipv6_netfilter_fini(); 1295 netfilter_fail: 1296 igmp6_cleanup(); 1297 igmp_fail: 1298 ndisc_cleanup(); 1299 ndisc_fail: 1300 icmpv6_cleanup(); 1301 icmp_fail: 1302 ip6_mr_cleanup(); 1303 ipmr_fail: 1304 unregister_pernet_subsys(&inet6_net_ops); 1305 register_pernet_fail: 1306 sock_unregister(PF_INET6); 1307 rtnl_unregister_all(PF_INET6); 1308 out_sock_register_fail: 1309 rawv6_exit(); 1310 out_unregister_ping_proto: 1311 proto_unregister(&pingv6_prot); 1312 out_unregister_raw_proto: 1313 proto_unregister(&rawv6_prot); 1314 out_unregister_udplite_proto: 1315 proto_unregister(&udplitev6_prot); 1316 out_unregister_udp_proto: 1317 proto_unregister(&udpv6_prot); 1318 out_unregister_tcp_proto: 1319 proto_unregister(&tcpv6_prot); 1320 goto out; 1321 } 1322 module_init(inet6_init); 1323 1324 MODULE_ALIAS_NETPROTO(PF_INET6); 1325