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 sk_common_release(sk); 257 goto out; 258 } 259 } 260 if (sk->sk_prot->init) { 261 err = sk->sk_prot->init(sk); 262 if (err) { 263 sk_common_release(sk); 264 goto out; 265 } 266 } 267 268 if (!kern) { 269 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk); 270 if (err) { 271 sk_common_release(sk); 272 goto out; 273 } 274 } 275 out: 276 return err; 277 out_rcu_unlock: 278 rcu_read_unlock(); 279 goto out; 280 } 281 282 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len, 283 u32 flags) 284 { 285 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr; 286 struct inet_sock *inet = inet_sk(sk); 287 struct ipv6_pinfo *np = inet6_sk(sk); 288 struct net *net = sock_net(sk); 289 __be32 v4addr = 0; 290 unsigned short snum; 291 bool saved_ipv6only; 292 int addr_type = 0; 293 int err = 0; 294 295 if (addr->sin6_family != AF_INET6) 296 return -EAFNOSUPPORT; 297 298 addr_type = ipv6_addr_type(&addr->sin6_addr); 299 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM) 300 return -EINVAL; 301 302 snum = ntohs(addr->sin6_port); 303 if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) && 304 snum && inet_port_requires_bind_service(net, snum) && 305 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) 306 return -EACCES; 307 308 if (flags & BIND_WITH_LOCK) 309 lock_sock(sk); 310 311 /* Check these errors (active socket, double bind). */ 312 if (sk->sk_state != TCP_CLOSE || inet->inet_num) { 313 err = -EINVAL; 314 goto out; 315 } 316 317 /* Check if the address belongs to the host. */ 318 if (addr_type == IPV6_ADDR_MAPPED) { 319 struct net_device *dev = NULL; 320 int chk_addr_ret; 321 322 /* Binding to v4-mapped address on a v6-only socket 323 * makes no sense 324 */ 325 if (ipv6_only_sock(sk)) { 326 err = -EINVAL; 327 goto out; 328 } 329 330 rcu_read_lock(); 331 if (sk->sk_bound_dev_if) { 332 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); 333 if (!dev) { 334 err = -ENODEV; 335 goto out_unlock; 336 } 337 } 338 339 /* Reproduce AF_INET checks to make the bindings consistent */ 340 v4addr = addr->sin6_addr.s6_addr32[3]; 341 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr); 342 rcu_read_unlock(); 343 344 if (!inet_addr_valid_or_nonlocal(net, inet, v4addr, 345 chk_addr_ret)) { 346 err = -EADDRNOTAVAIL; 347 goto out; 348 } 349 } else { 350 if (addr_type != IPV6_ADDR_ANY) { 351 struct net_device *dev = NULL; 352 353 rcu_read_lock(); 354 if (__ipv6_addr_needs_scope_id(addr_type)) { 355 if (addr_len >= sizeof(struct sockaddr_in6) && 356 addr->sin6_scope_id) { 357 /* Override any existing binding, if another one 358 * is supplied by user. 359 */ 360 sk->sk_bound_dev_if = addr->sin6_scope_id; 361 } 362 363 /* Binding to link-local address requires an interface */ 364 if (!sk->sk_bound_dev_if) { 365 err = -EINVAL; 366 goto out_unlock; 367 } 368 } 369 370 if (sk->sk_bound_dev_if) { 371 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); 372 if (!dev) { 373 err = -ENODEV; 374 goto out_unlock; 375 } 376 } 377 378 /* ipv4 addr of the socket is invalid. Only the 379 * unspecified and mapped address have a v4 equivalent. 380 */ 381 v4addr = LOOPBACK4_IPV6; 382 if (!(addr_type & IPV6_ADDR_MULTICAST)) { 383 if (!ipv6_can_nonlocal_bind(net, inet) && 384 !ipv6_chk_addr(net, &addr->sin6_addr, 385 dev, 0)) { 386 err = -EADDRNOTAVAIL; 387 goto out_unlock; 388 } 389 } 390 rcu_read_unlock(); 391 } 392 } 393 394 inet->inet_rcv_saddr = v4addr; 395 inet->inet_saddr = v4addr; 396 397 sk->sk_v6_rcv_saddr = addr->sin6_addr; 398 399 if (!(addr_type & IPV6_ADDR_MULTICAST)) 400 np->saddr = addr->sin6_addr; 401 402 saved_ipv6only = sk->sk_ipv6only; 403 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED) 404 sk->sk_ipv6only = 1; 405 406 /* Make sure we are allowed to bind here. */ 407 if (snum || !(inet_test_bit(BIND_ADDRESS_NO_PORT, sk) || 408 (flags & BIND_FORCE_ADDRESS_NO_PORT))) { 409 err = sk->sk_prot->get_port(sk, snum); 410 if (err) { 411 sk->sk_ipv6only = saved_ipv6only; 412 inet_reset_saddr(sk); 413 goto out; 414 } 415 if (!(flags & BIND_FROM_BPF)) { 416 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk); 417 if (err) { 418 sk->sk_ipv6only = saved_ipv6only; 419 inet_reset_saddr(sk); 420 if (sk->sk_prot->put_port) 421 sk->sk_prot->put_port(sk); 422 goto out; 423 } 424 } 425 } 426 427 if (addr_type != IPV6_ADDR_ANY) 428 sk->sk_userlocks |= SOCK_BINDADDR_LOCK; 429 if (snum) 430 sk->sk_userlocks |= SOCK_BINDPORT_LOCK; 431 inet->inet_sport = htons(inet->inet_num); 432 inet->inet_dport = 0; 433 inet->inet_daddr = 0; 434 out: 435 if (flags & BIND_WITH_LOCK) 436 release_sock(sk); 437 return err; 438 out_unlock: 439 rcu_read_unlock(); 440 goto out; 441 } 442 443 int inet6_bind_sk(struct sock *sk, struct sockaddr *uaddr, int addr_len) 444 { 445 u32 flags = BIND_WITH_LOCK; 446 const struct proto *prot; 447 int err = 0; 448 449 /* IPV6_ADDRFORM can change sk->sk_prot under us. */ 450 prot = READ_ONCE(sk->sk_prot); 451 /* If the socket has its own bind function then use it. */ 452 if (prot->bind) 453 return prot->bind(sk, uaddr, addr_len); 454 455 if (addr_len < SIN6_LEN_RFC2133) 456 return -EINVAL; 457 458 /* BPF prog is run before any checks are done so that if the prog 459 * changes context in a wrong way it will be caught. 460 */ 461 err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, &addr_len, 462 CGROUP_INET6_BIND, &flags); 463 if (err) 464 return err; 465 466 return __inet6_bind(sk, uaddr, addr_len, flags); 467 } 468 469 /* bind for INET6 API */ 470 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 471 { 472 return inet6_bind_sk(sock->sk, uaddr, addr_len); 473 } 474 EXPORT_SYMBOL(inet6_bind); 475 476 int inet6_release(struct socket *sock) 477 { 478 struct sock *sk = sock->sk; 479 480 if (!sk) 481 return -EINVAL; 482 483 /* Free mc lists */ 484 ipv6_sock_mc_close(sk); 485 486 /* Free ac lists */ 487 ipv6_sock_ac_close(sk); 488 489 return inet_release(sock); 490 } 491 EXPORT_SYMBOL(inet6_release); 492 493 void inet6_cleanup_sock(struct sock *sk) 494 { 495 struct ipv6_pinfo *np = inet6_sk(sk); 496 struct sk_buff *skb; 497 struct ipv6_txoptions *opt; 498 499 /* Release rx options */ 500 501 skb = xchg(&np->pktoptions, NULL); 502 kfree_skb(skb); 503 504 skb = xchg(&np->rxpmtu, NULL); 505 kfree_skb(skb); 506 507 /* Free flowlabels */ 508 fl6_free_socklist(sk); 509 510 /* Free tx options */ 511 512 opt = unrcu_pointer(xchg(&np->opt, NULL)); 513 if (opt) { 514 atomic_sub(opt->tot_len, &sk->sk_omem_alloc); 515 txopt_put(opt); 516 } 517 } 518 EXPORT_SYMBOL_GPL(inet6_cleanup_sock); 519 520 /* 521 * This does both peername and sockname. 522 */ 523 int inet6_getname(struct socket *sock, struct sockaddr *uaddr, 524 int peer) 525 { 526 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr; 527 int sin_addr_len = sizeof(*sin); 528 struct sock *sk = sock->sk; 529 struct inet_sock *inet = inet_sk(sk); 530 struct ipv6_pinfo *np = inet6_sk(sk); 531 532 sin->sin6_family = AF_INET6; 533 sin->sin6_flowinfo = 0; 534 sin->sin6_scope_id = 0; 535 lock_sock(sk); 536 if (peer) { 537 if (!inet->inet_dport || 538 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && 539 peer == 1)) { 540 release_sock(sk); 541 return -ENOTCONN; 542 } 543 sin->sin6_port = inet->inet_dport; 544 sin->sin6_addr = sk->sk_v6_daddr; 545 if (inet6_test_bit(SNDFLOW, sk)) 546 sin->sin6_flowinfo = np->flow_label; 547 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len, 548 CGROUP_INET6_GETPEERNAME); 549 } else { 550 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) 551 sin->sin6_addr = np->saddr; 552 else 553 sin->sin6_addr = sk->sk_v6_rcv_saddr; 554 sin->sin6_port = inet->inet_sport; 555 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len, 556 CGROUP_INET6_GETSOCKNAME); 557 } 558 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr, 559 sk->sk_bound_dev_if); 560 release_sock(sk); 561 return sin_addr_len; 562 } 563 EXPORT_SYMBOL(inet6_getname); 564 565 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 566 { 567 void __user *argp = (void __user *)arg; 568 struct sock *sk = sock->sk; 569 struct net *net = sock_net(sk); 570 const struct proto *prot; 571 572 switch (cmd) { 573 case SIOCADDRT: 574 case SIOCDELRT: { 575 struct in6_rtmsg rtmsg; 576 577 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg))) 578 return -EFAULT; 579 return ipv6_route_ioctl(net, cmd, &rtmsg); 580 } 581 case SIOCSIFADDR: 582 return addrconf_add_ifaddr(net, argp); 583 case SIOCDIFADDR: 584 return addrconf_del_ifaddr(net, argp); 585 case SIOCSIFDSTADDR: 586 return addrconf_set_dstaddr(net, argp); 587 default: 588 /* IPV6_ADDRFORM can change sk->sk_prot under us. */ 589 prot = READ_ONCE(sk->sk_prot); 590 if (!prot->ioctl) 591 return -ENOIOCTLCMD; 592 return sk_ioctl(sk, cmd, (void __user *)arg); 593 } 594 /*NOTREACHED*/ 595 return 0; 596 } 597 EXPORT_SYMBOL(inet6_ioctl); 598 599 #ifdef CONFIG_COMPAT 600 struct compat_in6_rtmsg { 601 struct in6_addr rtmsg_dst; 602 struct in6_addr rtmsg_src; 603 struct in6_addr rtmsg_gateway; 604 u32 rtmsg_type; 605 u16 rtmsg_dst_len; 606 u16 rtmsg_src_len; 607 u32 rtmsg_metric; 608 u32 rtmsg_info; 609 u32 rtmsg_flags; 610 s32 rtmsg_ifindex; 611 }; 612 613 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd, 614 struct compat_in6_rtmsg __user *ur) 615 { 616 struct in6_rtmsg rt; 617 618 if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst, 619 3 * sizeof(struct in6_addr)) || 620 get_user(rt.rtmsg_type, &ur->rtmsg_type) || 621 get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) || 622 get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) || 623 get_user(rt.rtmsg_metric, &ur->rtmsg_metric) || 624 get_user(rt.rtmsg_info, &ur->rtmsg_info) || 625 get_user(rt.rtmsg_flags, &ur->rtmsg_flags) || 626 get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex)) 627 return -EFAULT; 628 629 630 return ipv6_route_ioctl(sock_net(sk), cmd, &rt); 631 } 632 633 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 634 { 635 void __user *argp = compat_ptr(arg); 636 struct sock *sk = sock->sk; 637 638 switch (cmd) { 639 case SIOCADDRT: 640 case SIOCDELRT: 641 return inet6_compat_routing_ioctl(sk, cmd, argp); 642 default: 643 return -ENOIOCTLCMD; 644 } 645 } 646 EXPORT_SYMBOL_GPL(inet6_compat_ioctl); 647 #endif /* CONFIG_COMPAT */ 648 649 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *, 650 size_t)); 651 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) 652 { 653 struct sock *sk = sock->sk; 654 const struct proto *prot; 655 656 if (unlikely(inet_send_prepare(sk))) 657 return -EAGAIN; 658 659 /* IPV6_ADDRFORM can change sk->sk_prot under us. */ 660 prot = READ_ONCE(sk->sk_prot); 661 return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg, 662 sk, msg, size); 663 } 664 665 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *, 666 size_t, int, int *)); 667 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, 668 int flags) 669 { 670 struct sock *sk = sock->sk; 671 const struct proto *prot; 672 int addr_len = 0; 673 int err; 674 675 if (likely(!(flags & MSG_ERRQUEUE))) 676 sock_rps_record_flow(sk); 677 678 /* IPV6_ADDRFORM can change sk->sk_prot under us. */ 679 prot = READ_ONCE(sk->sk_prot); 680 err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg, 681 sk, msg, size, flags, &addr_len); 682 if (err >= 0) 683 msg->msg_namelen = addr_len; 684 return err; 685 } 686 687 const struct proto_ops inet6_stream_ops = { 688 .family = PF_INET6, 689 .owner = THIS_MODULE, 690 .release = inet6_release, 691 .bind = inet6_bind, 692 .connect = inet_stream_connect, /* ok */ 693 .socketpair = sock_no_socketpair, /* a do nothing */ 694 .accept = inet_accept, /* ok */ 695 .getname = inet6_getname, 696 .poll = tcp_poll, /* ok */ 697 .ioctl = inet6_ioctl, /* must change */ 698 .gettstamp = sock_gettstamp, 699 .listen = inet_listen, /* ok */ 700 .shutdown = inet_shutdown, /* ok */ 701 .setsockopt = sock_common_setsockopt, /* ok */ 702 .getsockopt = sock_common_getsockopt, /* ok */ 703 .sendmsg = inet6_sendmsg, /* retpoline's sake */ 704 .recvmsg = inet6_recvmsg, /* retpoline's sake */ 705 #ifdef CONFIG_MMU 706 .mmap = tcp_mmap, 707 #endif 708 .splice_eof = inet_splice_eof, 709 .sendmsg_locked = tcp_sendmsg_locked, 710 .splice_read = tcp_splice_read, 711 .read_sock = tcp_read_sock, 712 .read_skb = tcp_read_skb, 713 .peek_len = tcp_peek_len, 714 #ifdef CONFIG_COMPAT 715 .compat_ioctl = inet6_compat_ioctl, 716 #endif 717 .set_rcvlowat = tcp_set_rcvlowat, 718 }; 719 720 const struct proto_ops inet6_dgram_ops = { 721 .family = PF_INET6, 722 .owner = THIS_MODULE, 723 .release = inet6_release, 724 .bind = inet6_bind, 725 .connect = inet_dgram_connect, /* ok */ 726 .socketpair = sock_no_socketpair, /* a do nothing */ 727 .accept = sock_no_accept, /* a do nothing */ 728 .getname = inet6_getname, 729 .poll = udp_poll, /* ok */ 730 .ioctl = inet6_ioctl, /* must change */ 731 .gettstamp = sock_gettstamp, 732 .listen = sock_no_listen, /* ok */ 733 .shutdown = inet_shutdown, /* ok */ 734 .setsockopt = sock_common_setsockopt, /* ok */ 735 .getsockopt = sock_common_getsockopt, /* ok */ 736 .sendmsg = inet6_sendmsg, /* retpoline's sake */ 737 .recvmsg = inet6_recvmsg, /* retpoline's sake */ 738 .read_skb = udp_read_skb, 739 .mmap = sock_no_mmap, 740 .set_peek_off = udp_set_peek_off, 741 #ifdef CONFIG_COMPAT 742 .compat_ioctl = inet6_compat_ioctl, 743 #endif 744 }; 745 746 static const struct net_proto_family inet6_family_ops = { 747 .family = PF_INET6, 748 .create = inet6_create, 749 .owner = THIS_MODULE, 750 }; 751 752 int inet6_register_protosw(struct inet_protosw *p) 753 { 754 struct list_head *lh; 755 struct inet_protosw *answer; 756 struct list_head *last_perm; 757 int protocol = p->protocol; 758 int ret; 759 760 spin_lock_bh(&inetsw6_lock); 761 762 ret = -EINVAL; 763 if (p->type >= SOCK_MAX) 764 goto out_illegal; 765 766 /* If we are trying to override a permanent protocol, bail. */ 767 answer = NULL; 768 ret = -EPERM; 769 last_perm = &inetsw6[p->type]; 770 list_for_each(lh, &inetsw6[p->type]) { 771 answer = list_entry(lh, struct inet_protosw, list); 772 773 /* Check only the non-wild match. */ 774 if (INET_PROTOSW_PERMANENT & answer->flags) { 775 if (protocol == answer->protocol) 776 break; 777 last_perm = lh; 778 } 779 780 answer = NULL; 781 } 782 if (answer) 783 goto out_permanent; 784 785 /* Add the new entry after the last permanent entry if any, so that 786 * the new entry does not override a permanent entry when matched with 787 * a wild-card protocol. But it is allowed to override any existing 788 * non-permanent entry. This means that when we remove this entry, the 789 * system automatically returns to the old behavior. 790 */ 791 list_add_rcu(&p->list, last_perm); 792 ret = 0; 793 out: 794 spin_unlock_bh(&inetsw6_lock); 795 return ret; 796 797 out_permanent: 798 pr_err("Attempt to override permanent protocol %d\n", protocol); 799 goto out; 800 801 out_illegal: 802 pr_err("Ignoring attempt to register invalid socket type %d\n", 803 p->type); 804 goto out; 805 } 806 EXPORT_SYMBOL(inet6_register_protosw); 807 808 void 809 inet6_unregister_protosw(struct inet_protosw *p) 810 { 811 if (INET_PROTOSW_PERMANENT & p->flags) { 812 pr_err("Attempt to unregister permanent protocol %d\n", 813 p->protocol); 814 } else { 815 spin_lock_bh(&inetsw6_lock); 816 list_del_rcu(&p->list); 817 spin_unlock_bh(&inetsw6_lock); 818 819 synchronize_net(); 820 } 821 } 822 EXPORT_SYMBOL(inet6_unregister_protosw); 823 824 int inet6_sk_rebuild_header(struct sock *sk) 825 { 826 struct ipv6_pinfo *np = inet6_sk(sk); 827 struct dst_entry *dst; 828 829 dst = __sk_dst_check(sk, np->dst_cookie); 830 831 if (!dst) { 832 struct inet_sock *inet = inet_sk(sk); 833 struct in6_addr *final_p, final; 834 struct flowi6 fl6; 835 836 memset(&fl6, 0, sizeof(fl6)); 837 fl6.flowi6_proto = sk->sk_protocol; 838 fl6.daddr = sk->sk_v6_daddr; 839 fl6.saddr = np->saddr; 840 fl6.flowlabel = np->flow_label; 841 fl6.flowi6_oif = sk->sk_bound_dev_if; 842 fl6.flowi6_mark = sk->sk_mark; 843 fl6.fl6_dport = inet->inet_dport; 844 fl6.fl6_sport = inet->inet_sport; 845 fl6.flowi6_uid = sk->sk_uid; 846 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6)); 847 848 rcu_read_lock(); 849 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt), 850 &final); 851 rcu_read_unlock(); 852 853 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p); 854 if (IS_ERR(dst)) { 855 sk->sk_route_caps = 0; 856 WRITE_ONCE(sk->sk_err_soft, -PTR_ERR(dst)); 857 return PTR_ERR(dst); 858 } 859 860 ip6_dst_store(sk, dst, NULL, NULL); 861 } 862 863 return 0; 864 } 865 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); 866 867 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, 868 const struct inet6_skb_parm *opt) 869 { 870 const struct ipv6_pinfo *np = inet6_sk(sk); 871 872 if (np->rxopt.all) { 873 if (((opt->flags & IP6SKB_HOPBYHOP) && 874 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) || 875 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) && 876 np->rxopt.bits.rxflow) || 877 (opt->srcrt && (np->rxopt.bits.srcrt || 878 np->rxopt.bits.osrcrt)) || 879 ((opt->dst1 || opt->dst0) && 880 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) 881 return true; 882 } 883 return false; 884 } 885 EXPORT_SYMBOL_GPL(ipv6_opt_accepted); 886 887 static struct packet_type ipv6_packet_type __read_mostly = { 888 .type = cpu_to_be16(ETH_P_IPV6), 889 .func = ipv6_rcv, 890 .list_func = ipv6_list_rcv, 891 }; 892 893 static int __init ipv6_packet_init(void) 894 { 895 dev_add_pack(&ipv6_packet_type); 896 return 0; 897 } 898 899 static void ipv6_packet_cleanup(void) 900 { 901 dev_remove_pack(&ipv6_packet_type); 902 } 903 904 static int __net_init ipv6_init_mibs(struct net *net) 905 { 906 int i; 907 908 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib); 909 if (!net->mib.udp_stats_in6) 910 return -ENOMEM; 911 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib); 912 if (!net->mib.udplite_stats_in6) 913 goto err_udplite_mib; 914 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib); 915 if (!net->mib.ipv6_statistics) 916 goto err_ip_mib; 917 918 for_each_possible_cpu(i) { 919 struct ipstats_mib *af_inet6_stats; 920 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i); 921 u64_stats_init(&af_inet6_stats->syncp); 922 } 923 924 925 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib); 926 if (!net->mib.icmpv6_statistics) 927 goto err_icmp_mib; 928 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib), 929 GFP_KERNEL); 930 if (!net->mib.icmpv6msg_statistics) 931 goto err_icmpmsg_mib; 932 return 0; 933 934 err_icmpmsg_mib: 935 free_percpu(net->mib.icmpv6_statistics); 936 err_icmp_mib: 937 free_percpu(net->mib.ipv6_statistics); 938 err_ip_mib: 939 free_percpu(net->mib.udplite_stats_in6); 940 err_udplite_mib: 941 free_percpu(net->mib.udp_stats_in6); 942 return -ENOMEM; 943 } 944 945 static void ipv6_cleanup_mibs(struct net *net) 946 { 947 free_percpu(net->mib.udp_stats_in6); 948 free_percpu(net->mib.udplite_stats_in6); 949 free_percpu(net->mib.ipv6_statistics); 950 free_percpu(net->mib.icmpv6_statistics); 951 kfree(net->mib.icmpv6msg_statistics); 952 } 953 954 static int __net_init inet6_net_init(struct net *net) 955 { 956 int err = 0; 957 958 net->ipv6.sysctl.bindv6only = 0; 959 net->ipv6.sysctl.icmpv6_time = 1*HZ; 960 net->ipv6.sysctl.icmpv6_echo_ignore_all = 0; 961 net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0; 962 net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0; 963 net->ipv6.sysctl.icmpv6_error_anycast_as_unicast = 0; 964 965 /* By default, rate limit error messages. 966 * Except for pmtu discovery, it would break it. 967 * proc_do_large_bitmap needs pointer to the bitmap. 968 */ 969 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1); 970 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1); 971 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask; 972 973 net->ipv6.sysctl.flowlabel_consistency = 1; 974 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS; 975 net->ipv6.sysctl.idgen_retries = 3; 976 net->ipv6.sysctl.idgen_delay = 1 * HZ; 977 net->ipv6.sysctl.flowlabel_state_ranges = 0; 978 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT; 979 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT; 980 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN; 981 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN; 982 net->ipv6.sysctl.fib_notify_on_flag_change = 0; 983 atomic_set(&net->ipv6.fib6_sernum, 1); 984 985 net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID; 986 net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE; 987 988 err = ipv6_init_mibs(net); 989 if (err) 990 return err; 991 #ifdef CONFIG_PROC_FS 992 err = udp6_proc_init(net); 993 if (err) 994 goto out; 995 err = tcp6_proc_init(net); 996 if (err) 997 goto proc_tcp6_fail; 998 err = ac6_proc_init(net); 999 if (err) 1000 goto proc_ac6_fail; 1001 #endif 1002 return err; 1003 1004 #ifdef CONFIG_PROC_FS 1005 proc_ac6_fail: 1006 tcp6_proc_exit(net); 1007 proc_tcp6_fail: 1008 udp6_proc_exit(net); 1009 out: 1010 ipv6_cleanup_mibs(net); 1011 return err; 1012 #endif 1013 } 1014 1015 static void __net_exit inet6_net_exit(struct net *net) 1016 { 1017 #ifdef CONFIG_PROC_FS 1018 udp6_proc_exit(net); 1019 tcp6_proc_exit(net); 1020 ac6_proc_exit(net); 1021 #endif 1022 ipv6_cleanup_mibs(net); 1023 } 1024 1025 static struct pernet_operations inet6_net_ops = { 1026 .init = inet6_net_init, 1027 .exit = inet6_net_exit, 1028 }; 1029 1030 static int ipv6_route_input(struct sk_buff *skb) 1031 { 1032 ip6_route_input(skb); 1033 return skb_dst(skb)->error; 1034 } 1035 1036 static const struct ipv6_stub ipv6_stub_impl = { 1037 .ipv6_sock_mc_join = ipv6_sock_mc_join, 1038 .ipv6_sock_mc_drop = ipv6_sock_mc_drop, 1039 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow, 1040 .ipv6_route_input = ipv6_route_input, 1041 .fib6_get_table = fib6_get_table, 1042 .fib6_table_lookup = fib6_table_lookup, 1043 .fib6_lookup = fib6_lookup, 1044 .fib6_select_path = fib6_select_path, 1045 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6, 1046 .fib6_nh_init = fib6_nh_init, 1047 .fib6_nh_release = fib6_nh_release, 1048 .fib6_nh_release_dsts = fib6_nh_release_dsts, 1049 .fib6_update_sernum = fib6_update_sernum_stub, 1050 .fib6_rt_update = fib6_rt_update, 1051 .ip6_del_rt = ip6_del_rt, 1052 .udpv6_encap_enable = udpv6_encap_enable, 1053 .ndisc_send_na = ndisc_send_na, 1054 #if IS_ENABLED(CONFIG_XFRM) 1055 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu, 1056 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv, 1057 .xfrm6_gro_udp_encap_rcv = xfrm6_gro_udp_encap_rcv, 1058 .xfrm6_rcv_encap = xfrm6_rcv_encap, 1059 #endif 1060 .nd_tbl = &nd_tbl, 1061 .ipv6_fragment = ip6_fragment, 1062 .ipv6_dev_find = ipv6_dev_find, 1063 .ip6_xmit = ip6_xmit, 1064 }; 1065 1066 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = { 1067 .inet6_bind = __inet6_bind, 1068 .udp6_lib_lookup = __udp6_lib_lookup, 1069 .ipv6_setsockopt = do_ipv6_setsockopt, 1070 .ipv6_getsockopt = do_ipv6_getsockopt, 1071 .ipv6_dev_get_saddr = ipv6_dev_get_saddr, 1072 }; 1073 1074 static int __init inet6_init(void) 1075 { 1076 struct list_head *r; 1077 int err = 0; 1078 1079 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm)); 1080 1081 /* Register the socket-side information for inet6_create. */ 1082 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) 1083 INIT_LIST_HEAD(r); 1084 1085 raw_hashinfo_init(&raw_v6_hashinfo); 1086 1087 if (disable_ipv6_mod) { 1088 pr_info("Loaded, but administratively disabled, reboot required to enable\n"); 1089 goto out; 1090 } 1091 1092 err = proto_register(&tcpv6_prot, 1); 1093 if (err) 1094 goto out; 1095 1096 err = proto_register(&udpv6_prot, 1); 1097 if (err) 1098 goto out_unregister_tcp_proto; 1099 1100 err = proto_register(&udplitev6_prot, 1); 1101 if (err) 1102 goto out_unregister_udp_proto; 1103 1104 err = proto_register(&rawv6_prot, 1); 1105 if (err) 1106 goto out_unregister_udplite_proto; 1107 1108 err = proto_register(&pingv6_prot, 1); 1109 if (err) 1110 goto out_unregister_raw_proto; 1111 1112 /* We MUST register RAW sockets before we create the ICMP6, 1113 * IGMP6, or NDISC control sockets. 1114 */ 1115 err = rawv6_init(); 1116 if (err) 1117 goto out_unregister_ping_proto; 1118 1119 /* Register the family here so that the init calls below will 1120 * be able to create sockets. (?? is this dangerous ??) 1121 */ 1122 err = sock_register(&inet6_family_ops); 1123 if (err) 1124 goto out_sock_register_fail; 1125 1126 /* 1127 * ipngwg API draft makes clear that the correct semantics 1128 * for TCP and UDP is to consider one TCP and UDP instance 1129 * in a host available by both INET and INET6 APIs and 1130 * able to communicate via both network protocols. 1131 */ 1132 1133 err = register_pernet_subsys(&inet6_net_ops); 1134 if (err) 1135 goto register_pernet_fail; 1136 err = ip6_mr_init(); 1137 if (err) 1138 goto ipmr_fail; 1139 err = icmpv6_init(); 1140 if (err) 1141 goto icmp_fail; 1142 err = ndisc_init(); 1143 if (err) 1144 goto ndisc_fail; 1145 err = igmp6_init(); 1146 if (err) 1147 goto igmp_fail; 1148 1149 err = ipv6_netfilter_init(); 1150 if (err) 1151 goto netfilter_fail; 1152 /* Create /proc/foo6 entries. */ 1153 #ifdef CONFIG_PROC_FS 1154 err = -ENOMEM; 1155 if (raw6_proc_init()) 1156 goto proc_raw6_fail; 1157 if (udplite6_proc_init()) 1158 goto proc_udplite6_fail; 1159 if (ipv6_misc_proc_init()) 1160 goto proc_misc6_fail; 1161 if (if6_proc_init()) 1162 goto proc_if6_fail; 1163 #endif 1164 err = ip6_route_init(); 1165 if (err) 1166 goto ip6_route_fail; 1167 err = ndisc_late_init(); 1168 if (err) 1169 goto ndisc_late_fail; 1170 err = ip6_flowlabel_init(); 1171 if (err) 1172 goto ip6_flowlabel_fail; 1173 err = ipv6_anycast_init(); 1174 if (err) 1175 goto ipv6_anycast_fail; 1176 err = addrconf_init(); 1177 if (err) 1178 goto addrconf_fail; 1179 1180 /* Init v6 extension headers. */ 1181 err = ipv6_exthdrs_init(); 1182 if (err) 1183 goto ipv6_exthdrs_fail; 1184 1185 err = ipv6_frag_init(); 1186 if (err) 1187 goto ipv6_frag_fail; 1188 1189 /* Init v6 transport protocols. */ 1190 err = udpv6_init(); 1191 if (err) 1192 goto udpv6_fail; 1193 1194 err = udplitev6_init(); 1195 if (err) 1196 goto udplitev6_fail; 1197 1198 err = udpv6_offload_init(); 1199 if (err) 1200 goto udpv6_offload_fail; 1201 1202 err = tcpv6_init(); 1203 if (err) 1204 goto tcpv6_fail; 1205 1206 err = ipv6_packet_init(); 1207 if (err) 1208 goto ipv6_packet_fail; 1209 1210 err = pingv6_init(); 1211 if (err) 1212 goto pingv6_fail; 1213 1214 err = calipso_init(); 1215 if (err) 1216 goto calipso_fail; 1217 1218 err = seg6_init(); 1219 if (err) 1220 goto seg6_fail; 1221 1222 err = rpl_init(); 1223 if (err) 1224 goto rpl_fail; 1225 1226 err = ioam6_init(); 1227 if (err) 1228 goto ioam6_fail; 1229 1230 err = igmp6_late_init(); 1231 if (err) 1232 goto igmp6_late_err; 1233 1234 #ifdef CONFIG_SYSCTL 1235 err = ipv6_sysctl_register(); 1236 if (err) 1237 goto sysctl_fail; 1238 #endif 1239 1240 /* ensure that ipv6 stubs are visible only after ipv6 is ready */ 1241 wmb(); 1242 ipv6_stub = &ipv6_stub_impl; 1243 ipv6_bpf_stub = &ipv6_bpf_stub_impl; 1244 out: 1245 return err; 1246 1247 #ifdef CONFIG_SYSCTL 1248 sysctl_fail: 1249 igmp6_late_cleanup(); 1250 #endif 1251 igmp6_late_err: 1252 ioam6_exit(); 1253 ioam6_fail: 1254 rpl_exit(); 1255 rpl_fail: 1256 seg6_exit(); 1257 seg6_fail: 1258 calipso_exit(); 1259 calipso_fail: 1260 pingv6_exit(); 1261 pingv6_fail: 1262 ipv6_packet_cleanup(); 1263 ipv6_packet_fail: 1264 tcpv6_exit(); 1265 tcpv6_fail: 1266 udpv6_offload_exit(); 1267 udpv6_offload_fail: 1268 udplitev6_exit(); 1269 udplitev6_fail: 1270 udpv6_exit(); 1271 udpv6_fail: 1272 ipv6_frag_exit(); 1273 ipv6_frag_fail: 1274 ipv6_exthdrs_exit(); 1275 ipv6_exthdrs_fail: 1276 addrconf_cleanup(); 1277 addrconf_fail: 1278 ipv6_anycast_cleanup(); 1279 ipv6_anycast_fail: 1280 ip6_flowlabel_cleanup(); 1281 ip6_flowlabel_fail: 1282 ndisc_late_cleanup(); 1283 ndisc_late_fail: 1284 ip6_route_cleanup(); 1285 ip6_route_fail: 1286 #ifdef CONFIG_PROC_FS 1287 if6_proc_exit(); 1288 proc_if6_fail: 1289 ipv6_misc_proc_exit(); 1290 proc_misc6_fail: 1291 udplite6_proc_exit(); 1292 proc_udplite6_fail: 1293 raw6_proc_exit(); 1294 proc_raw6_fail: 1295 #endif 1296 ipv6_netfilter_fini(); 1297 netfilter_fail: 1298 igmp6_cleanup(); 1299 igmp_fail: 1300 ndisc_cleanup(); 1301 ndisc_fail: 1302 icmpv6_cleanup(); 1303 icmp_fail: 1304 ip6_mr_cleanup(); 1305 ipmr_fail: 1306 unregister_pernet_subsys(&inet6_net_ops); 1307 register_pernet_fail: 1308 sock_unregister(PF_INET6); 1309 rtnl_unregister_all(PF_INET6); 1310 out_sock_register_fail: 1311 rawv6_exit(); 1312 out_unregister_ping_proto: 1313 proto_unregister(&pingv6_prot); 1314 out_unregister_raw_proto: 1315 proto_unregister(&rawv6_prot); 1316 out_unregister_udplite_proto: 1317 proto_unregister(&udplitev6_prot); 1318 out_unregister_udp_proto: 1319 proto_unregister(&udpv6_prot); 1320 out_unregister_tcp_proto: 1321 proto_unregister(&tcpv6_prot); 1322 goto out; 1323 } 1324 module_init(inet6_init); 1325 1326 MODULE_ALIAS_NETPROTO(PF_INET6); 1327