1 /* 2 * PF_INET6 socket protocol family 3 * Linux INET6 implementation 4 * 5 * Authors: 6 * Pedro Roque <roque@di.fc.ul.pt> 7 * 8 * Adapted from linux/net/ipv4/af_inet.c 9 * 10 * $Id: af_inet6.c,v 1.66 2002/02/01 22:01:04 davem Exp $ 11 * 12 * Fixes: 13 * piggy, Karl Knutson : Socket protocol table 14 * Hideaki YOSHIFUJI : sin6_scope_id support 15 * Arnaldo Melo : check proc_net_create return, cleanups 16 * 17 * This program is free software; you can redistribute it and/or 18 * modify it under the terms of the GNU General Public License 19 * as published by the Free Software Foundation; either version 20 * 2 of the License, or (at your option) any later version. 21 */ 22 23 24 #include <linux/module.h> 25 #include <linux/config.h> 26 #include <linux/errno.h> 27 #include <linux/types.h> 28 #include <linux/socket.h> 29 #include <linux/in.h> 30 #include <linux/kernel.h> 31 #include <linux/sched.h> 32 #include <linux/timer.h> 33 #include <linux/string.h> 34 #include <linux/sockios.h> 35 #include <linux/net.h> 36 #include <linux/fcntl.h> 37 #include <linux/mm.h> 38 #include <linux/interrupt.h> 39 #include <linux/proc_fs.h> 40 #include <linux/stat.h> 41 #include <linux/init.h> 42 43 #include <linux/inet.h> 44 #include <linux/netdevice.h> 45 #include <linux/icmpv6.h> 46 #include <linux/smp_lock.h> 47 #include <linux/netfilter_ipv6.h> 48 49 #include <net/ip.h> 50 #include <net/ipv6.h> 51 #include <net/udp.h> 52 #include <net/tcp.h> 53 #include <net/ipip.h> 54 #include <net/protocol.h> 55 #include <net/inet_common.h> 56 #include <net/transp_v6.h> 57 #include <net/ip6_route.h> 58 #include <net/addrconf.h> 59 #ifdef CONFIG_IPV6_TUNNEL 60 #include <net/ip6_tunnel.h> 61 #endif 62 63 #include <asm/uaccess.h> 64 #include <asm/system.h> 65 66 MODULE_AUTHOR("Cast of dozens"); 67 MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); 68 MODULE_LICENSE("GPL"); 69 70 int sysctl_ipv6_bindv6only; 71 72 /* The inetsw table contains everything that inet_create needs to 73 * build a new socket. 74 */ 75 static struct list_head inetsw6[SOCK_MAX]; 76 static DEFINE_SPINLOCK(inetsw6_lock); 77 78 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) 79 { 80 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); 81 82 return (struct ipv6_pinfo *)(((u8 *)sk) + offset); 83 } 84 85 static int inet6_create(struct socket *sock, int protocol) 86 { 87 struct inet_sock *inet; 88 struct ipv6_pinfo *np; 89 struct sock *sk; 90 struct list_head *p; 91 struct inet_protosw *answer; 92 struct proto *answer_prot; 93 unsigned char answer_flags; 94 char answer_no_check; 95 int rc; 96 97 /* Look for the requested type/protocol pair. */ 98 answer = NULL; 99 rcu_read_lock(); 100 list_for_each_rcu(p, &inetsw6[sock->type]) { 101 answer = list_entry(p, struct inet_protosw, list); 102 103 /* Check the non-wild match. */ 104 if (protocol == answer->protocol) { 105 if (protocol != IPPROTO_IP) 106 break; 107 } else { 108 /* Check for the two wild cases. */ 109 if (IPPROTO_IP == protocol) { 110 protocol = answer->protocol; 111 break; 112 } 113 if (IPPROTO_IP == answer->protocol) 114 break; 115 } 116 answer = NULL; 117 } 118 119 rc = -ESOCKTNOSUPPORT; 120 if (!answer) 121 goto out_rcu_unlock; 122 rc = -EPERM; 123 if (answer->capability > 0 && !capable(answer->capability)) 124 goto out_rcu_unlock; 125 rc = -EPROTONOSUPPORT; 126 if (!protocol) 127 goto out_rcu_unlock; 128 129 sock->ops = answer->ops; 130 131 answer_prot = answer->prot; 132 answer_no_check = answer->no_check; 133 answer_flags = answer->flags; 134 rcu_read_unlock(); 135 136 BUG_TRAP(answer_prot->slab != NULL); 137 138 rc = -ENOBUFS; 139 sk = sk_alloc(PF_INET6, GFP_KERNEL, answer_prot, 1); 140 if (sk == NULL) 141 goto out; 142 143 sock_init_data(sock, sk); 144 145 rc = 0; 146 sk->sk_no_check = answer_no_check; 147 if (INET_PROTOSW_REUSE & answer_flags) 148 sk->sk_reuse = 1; 149 150 inet = inet_sk(sk); 151 152 if (SOCK_RAW == sock->type) { 153 inet->num = protocol; 154 if (IPPROTO_RAW == protocol) 155 inet->hdrincl = 1; 156 } 157 158 sk->sk_destruct = inet_sock_destruct; 159 sk->sk_family = PF_INET6; 160 sk->sk_protocol = protocol; 161 162 sk->sk_backlog_rcv = answer->prot->backlog_rcv; 163 164 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); 165 np->hop_limit = -1; 166 np->mcast_hops = -1; 167 np->mc_loop = 1; 168 np->pmtudisc = IPV6_PMTUDISC_WANT; 169 np->ipv6only = sysctl_ipv6_bindv6only; 170 171 /* Init the ipv4 part of the socket since we can have sockets 172 * using v6 API for ipv4. 173 */ 174 inet->uc_ttl = -1; 175 176 inet->mc_loop = 1; 177 inet->mc_ttl = 1; 178 inet->mc_index = 0; 179 inet->mc_list = NULL; 180 181 if (ipv4_config.no_pmtu_disc) 182 inet->pmtudisc = IP_PMTUDISC_DONT; 183 else 184 inet->pmtudisc = IP_PMTUDISC_WANT; 185 /* 186 * Increment only the relevant sk_prot->socks debug field, this changes 187 * the previous behaviour of incrementing both the equivalent to 188 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. 189 * 190 * This allows better debug granularity as we'll know exactly how many 191 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 192 * transport protocol socks. -acme 193 */ 194 sk_refcnt_debug_inc(sk); 195 196 if (inet->num) { 197 /* It assumes that any protocol which allows 198 * the user to assign a number at socket 199 * creation time automatically shares. 200 */ 201 inet->sport = ntohs(inet->num); 202 sk->sk_prot->hash(sk); 203 } 204 if (sk->sk_prot->init) { 205 rc = sk->sk_prot->init(sk); 206 if (rc) { 207 sk_common_release(sk); 208 goto out; 209 } 210 } 211 out: 212 return rc; 213 out_rcu_unlock: 214 rcu_read_unlock(); 215 goto out; 216 } 217 218 219 /* bind for INET6 API */ 220 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 221 { 222 struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr; 223 struct sock *sk = sock->sk; 224 struct inet_sock *inet = inet_sk(sk); 225 struct ipv6_pinfo *np = inet6_sk(sk); 226 __u32 v4addr = 0; 227 unsigned short snum; 228 int addr_type = 0; 229 int err = 0; 230 231 /* If the socket has its own bind function then use it. */ 232 if (sk->sk_prot->bind) 233 return sk->sk_prot->bind(sk, uaddr, addr_len); 234 235 if (addr_len < SIN6_LEN_RFC2133) 236 return -EINVAL; 237 addr_type = ipv6_addr_type(&addr->sin6_addr); 238 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) 239 return -EINVAL; 240 241 snum = ntohs(addr->sin6_port); 242 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 243 return -EACCES; 244 245 lock_sock(sk); 246 247 /* Check these errors (active socket, double bind). */ 248 if (sk->sk_state != TCP_CLOSE || inet->num) { 249 err = -EINVAL; 250 goto out; 251 } 252 253 /* Check if the address belongs to the host. */ 254 if (addr_type == IPV6_ADDR_MAPPED) { 255 v4addr = addr->sin6_addr.s6_addr32[3]; 256 if (inet_addr_type(v4addr) != RTN_LOCAL) { 257 err = -EADDRNOTAVAIL; 258 goto out; 259 } 260 } else { 261 if (addr_type != IPV6_ADDR_ANY) { 262 struct net_device *dev = NULL; 263 264 if (addr_type & IPV6_ADDR_LINKLOCAL) { 265 if (addr_len >= sizeof(struct sockaddr_in6) && 266 addr->sin6_scope_id) { 267 /* Override any existing binding, if another one 268 * is supplied by user. 269 */ 270 sk->sk_bound_dev_if = addr->sin6_scope_id; 271 } 272 273 /* Binding to link-local address requires an interface */ 274 if (!sk->sk_bound_dev_if) { 275 err = -EINVAL; 276 goto out; 277 } 278 dev = dev_get_by_index(sk->sk_bound_dev_if); 279 if (!dev) { 280 err = -ENODEV; 281 goto out; 282 } 283 } 284 285 /* ipv4 addr of the socket is invalid. Only the 286 * unspecified and mapped address have a v4 equivalent. 287 */ 288 v4addr = LOOPBACK4_IPV6; 289 if (!(addr_type & IPV6_ADDR_MULTICAST)) { 290 if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { 291 if (dev) 292 dev_put(dev); 293 err = -EADDRNOTAVAIL; 294 goto out; 295 } 296 } 297 if (dev) 298 dev_put(dev); 299 } 300 } 301 302 inet->rcv_saddr = v4addr; 303 inet->saddr = v4addr; 304 305 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); 306 307 if (!(addr_type & IPV6_ADDR_MULTICAST)) 308 ipv6_addr_copy(&np->saddr, &addr->sin6_addr); 309 310 /* Make sure we are allowed to bind here. */ 311 if (sk->sk_prot->get_port(sk, snum)) { 312 inet_reset_saddr(sk); 313 err = -EADDRINUSE; 314 goto out; 315 } 316 317 if (addr_type != IPV6_ADDR_ANY) 318 sk->sk_userlocks |= SOCK_BINDADDR_LOCK; 319 if (snum) 320 sk->sk_userlocks |= SOCK_BINDPORT_LOCK; 321 inet->sport = ntohs(inet->num); 322 inet->dport = 0; 323 inet->daddr = 0; 324 out: 325 release_sock(sk); 326 return err; 327 } 328 329 int inet6_release(struct socket *sock) 330 { 331 struct sock *sk = sock->sk; 332 333 if (sk == NULL) 334 return -EINVAL; 335 336 /* Free mc lists */ 337 ipv6_sock_mc_close(sk); 338 339 /* Free ac lists */ 340 ipv6_sock_ac_close(sk); 341 342 return inet_release(sock); 343 } 344 345 int inet6_destroy_sock(struct sock *sk) 346 { 347 struct ipv6_pinfo *np = inet6_sk(sk); 348 struct sk_buff *skb; 349 struct ipv6_txoptions *opt; 350 351 /* 352 * Release destination entry 353 */ 354 355 sk_dst_reset(sk); 356 357 /* Release rx options */ 358 359 if ((skb = xchg(&np->pktoptions, NULL)) != NULL) 360 kfree_skb(skb); 361 362 /* Free flowlabels */ 363 fl6_free_socklist(sk); 364 365 /* Free tx options */ 366 367 if ((opt = xchg(&np->opt, NULL)) != NULL) 368 sock_kfree_s(sk, opt, opt->tot_len); 369 370 return 0; 371 } 372 373 /* 374 * This does both peername and sockname. 375 */ 376 377 int inet6_getname(struct socket *sock, struct sockaddr *uaddr, 378 int *uaddr_len, int peer) 379 { 380 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr; 381 struct sock *sk = sock->sk; 382 struct inet_sock *inet = inet_sk(sk); 383 struct ipv6_pinfo *np = inet6_sk(sk); 384 385 sin->sin6_family = AF_INET6; 386 sin->sin6_flowinfo = 0; 387 sin->sin6_scope_id = 0; 388 if (peer) { 389 if (!inet->dport) 390 return -ENOTCONN; 391 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && 392 peer == 1) 393 return -ENOTCONN; 394 sin->sin6_port = inet->dport; 395 ipv6_addr_copy(&sin->sin6_addr, &np->daddr); 396 if (np->sndflow) 397 sin->sin6_flowinfo = np->flow_label; 398 } else { 399 if (ipv6_addr_any(&np->rcv_saddr)) 400 ipv6_addr_copy(&sin->sin6_addr, &np->saddr); 401 else 402 ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr); 403 404 sin->sin6_port = inet->sport; 405 } 406 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) 407 sin->sin6_scope_id = sk->sk_bound_dev_if; 408 *uaddr_len = sizeof(*sin); 409 return(0); 410 } 411 412 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 413 { 414 struct sock *sk = sock->sk; 415 int err = -EINVAL; 416 417 switch(cmd) 418 { 419 case SIOCGSTAMP: 420 return sock_get_timestamp(sk, (struct timeval __user *)arg); 421 422 case SIOCADDRT: 423 case SIOCDELRT: 424 425 return(ipv6_route_ioctl(cmd,(void __user *)arg)); 426 427 case SIOCSIFADDR: 428 return addrconf_add_ifaddr((void __user *) arg); 429 case SIOCDIFADDR: 430 return addrconf_del_ifaddr((void __user *) arg); 431 case SIOCSIFDSTADDR: 432 return addrconf_set_dstaddr((void __user *) arg); 433 default: 434 if (!sk->sk_prot->ioctl || 435 (err = sk->sk_prot->ioctl(sk, cmd, arg)) == -ENOIOCTLCMD) 436 return(dev_ioctl(cmd,(void __user *) arg)); 437 return err; 438 } 439 /*NOTREACHED*/ 440 return(0); 441 } 442 443 struct proto_ops inet6_stream_ops = { 444 .family = PF_INET6, 445 .owner = THIS_MODULE, 446 .release = inet6_release, 447 .bind = inet6_bind, 448 .connect = inet_stream_connect, /* ok */ 449 .socketpair = sock_no_socketpair, /* a do nothing */ 450 .accept = inet_accept, /* ok */ 451 .getname = inet6_getname, 452 .poll = tcp_poll, /* ok */ 453 .ioctl = inet6_ioctl, /* must change */ 454 .listen = inet_listen, /* ok */ 455 .shutdown = inet_shutdown, /* ok */ 456 .setsockopt = sock_common_setsockopt, /* ok */ 457 .getsockopt = sock_common_getsockopt, /* ok */ 458 .sendmsg = inet_sendmsg, /* ok */ 459 .recvmsg = sock_common_recvmsg, /* ok */ 460 .mmap = sock_no_mmap, 461 .sendpage = tcp_sendpage 462 }; 463 464 struct proto_ops inet6_dgram_ops = { 465 .family = PF_INET6, 466 .owner = THIS_MODULE, 467 .release = inet6_release, 468 .bind = inet6_bind, 469 .connect = inet_dgram_connect, /* ok */ 470 .socketpair = sock_no_socketpair, /* a do nothing */ 471 .accept = sock_no_accept, /* a do nothing */ 472 .getname = inet6_getname, 473 .poll = udp_poll, /* ok */ 474 .ioctl = inet6_ioctl, /* must change */ 475 .listen = sock_no_listen, /* ok */ 476 .shutdown = inet_shutdown, /* ok */ 477 .setsockopt = sock_common_setsockopt, /* ok */ 478 .getsockopt = sock_common_getsockopt, /* ok */ 479 .sendmsg = inet_sendmsg, /* ok */ 480 .recvmsg = sock_common_recvmsg, /* ok */ 481 .mmap = sock_no_mmap, 482 .sendpage = sock_no_sendpage, 483 }; 484 485 static struct net_proto_family inet6_family_ops = { 486 .family = PF_INET6, 487 .create = inet6_create, 488 .owner = THIS_MODULE, 489 }; 490 491 /* Same as inet6_dgram_ops, sans udp_poll. */ 492 static struct proto_ops inet6_sockraw_ops = { 493 .family = PF_INET6, 494 .owner = THIS_MODULE, 495 .release = inet6_release, 496 .bind = inet6_bind, 497 .connect = inet_dgram_connect, /* ok */ 498 .socketpair = sock_no_socketpair, /* a do nothing */ 499 .accept = sock_no_accept, /* a do nothing */ 500 .getname = inet6_getname, 501 .poll = datagram_poll, /* ok */ 502 .ioctl = inet6_ioctl, /* must change */ 503 .listen = sock_no_listen, /* ok */ 504 .shutdown = inet_shutdown, /* ok */ 505 .setsockopt = sock_common_setsockopt, /* ok */ 506 .getsockopt = sock_common_getsockopt, /* ok */ 507 .sendmsg = inet_sendmsg, /* ok */ 508 .recvmsg = sock_common_recvmsg, /* ok */ 509 .mmap = sock_no_mmap, 510 .sendpage = sock_no_sendpage, 511 }; 512 513 static struct inet_protosw rawv6_protosw = { 514 .type = SOCK_RAW, 515 .protocol = IPPROTO_IP, /* wild card */ 516 .prot = &rawv6_prot, 517 .ops = &inet6_sockraw_ops, 518 .capability = CAP_NET_RAW, 519 .no_check = UDP_CSUM_DEFAULT, 520 .flags = INET_PROTOSW_REUSE, 521 }; 522 523 void 524 inet6_register_protosw(struct inet_protosw *p) 525 { 526 struct list_head *lh; 527 struct inet_protosw *answer; 528 int protocol = p->protocol; 529 struct list_head *last_perm; 530 531 spin_lock_bh(&inetsw6_lock); 532 533 if (p->type >= SOCK_MAX) 534 goto out_illegal; 535 536 /* If we are trying to override a permanent protocol, bail. */ 537 answer = NULL; 538 last_perm = &inetsw6[p->type]; 539 list_for_each(lh, &inetsw6[p->type]) { 540 answer = list_entry(lh, struct inet_protosw, list); 541 542 /* Check only the non-wild match. */ 543 if (INET_PROTOSW_PERMANENT & answer->flags) { 544 if (protocol == answer->protocol) 545 break; 546 last_perm = lh; 547 } 548 549 answer = NULL; 550 } 551 if (answer) 552 goto out_permanent; 553 554 /* Add the new entry after the last permanent entry if any, so that 555 * the new entry does not override a permanent entry when matched with 556 * a wild-card protocol. But it is allowed to override any existing 557 * non-permanent entry. This means that when we remove this entry, the 558 * system automatically returns to the old behavior. 559 */ 560 list_add_rcu(&p->list, last_perm); 561 out: 562 spin_unlock_bh(&inetsw6_lock); 563 return; 564 565 out_permanent: 566 printk(KERN_ERR "Attempt to override permanent protocol %d.\n", 567 protocol); 568 goto out; 569 570 out_illegal: 571 printk(KERN_ERR 572 "Ignoring attempt to register invalid socket type %d.\n", 573 p->type); 574 goto out; 575 } 576 577 void 578 inet6_unregister_protosw(struct inet_protosw *p) 579 { 580 if (INET_PROTOSW_PERMANENT & p->flags) { 581 printk(KERN_ERR 582 "Attempt to unregister permanent protocol %d.\n", 583 p->protocol); 584 } else { 585 spin_lock_bh(&inetsw6_lock); 586 list_del_rcu(&p->list); 587 spin_unlock_bh(&inetsw6_lock); 588 589 synchronize_net(); 590 } 591 } 592 593 int 594 snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign) 595 { 596 if (ptr == NULL) 597 return -EINVAL; 598 599 ptr[0] = __alloc_percpu(mibsize, mibalign); 600 if (!ptr[0]) 601 goto err0; 602 603 ptr[1] = __alloc_percpu(mibsize, mibalign); 604 if (!ptr[1]) 605 goto err1; 606 607 return 0; 608 609 err1: 610 free_percpu(ptr[0]); 611 ptr[0] = NULL; 612 err0: 613 return -ENOMEM; 614 } 615 616 void 617 snmp6_mib_free(void *ptr[2]) 618 { 619 if (ptr == NULL) 620 return; 621 if (ptr[0]) 622 free_percpu(ptr[0]); 623 if (ptr[1]) 624 free_percpu(ptr[1]); 625 ptr[0] = ptr[1] = NULL; 626 } 627 628 static int __init init_ipv6_mibs(void) 629 { 630 if (snmp6_mib_init((void **)ipv6_statistics, sizeof (struct ipstats_mib), 631 __alignof__(struct ipstats_mib)) < 0) 632 goto err_ip_mib; 633 if (snmp6_mib_init((void **)icmpv6_statistics, sizeof (struct icmpv6_mib), 634 __alignof__(struct icmpv6_mib)) < 0) 635 goto err_icmp_mib; 636 if (snmp6_mib_init((void **)udp_stats_in6, sizeof (struct udp_mib), 637 __alignof__(struct udp_mib)) < 0) 638 goto err_udp_mib; 639 return 0; 640 641 err_udp_mib: 642 snmp6_mib_free((void **)icmpv6_statistics); 643 err_icmp_mib: 644 snmp6_mib_free((void **)ipv6_statistics); 645 err_ip_mib: 646 return -ENOMEM; 647 648 } 649 650 static void cleanup_ipv6_mibs(void) 651 { 652 snmp6_mib_free((void **)ipv6_statistics); 653 snmp6_mib_free((void **)icmpv6_statistics); 654 snmp6_mib_free((void **)udp_stats_in6); 655 } 656 657 static int __init inet6_init(void) 658 { 659 struct sk_buff *dummy_skb; 660 struct list_head *r; 661 int err; 662 663 #ifdef MODULE 664 #if 0 /* FIXME --RR */ 665 if (!mod_member_present(&__this_module, can_unload)) 666 return -EINVAL; 667 668 __this_module.can_unload = &ipv6_unload; 669 #endif 670 #endif 671 672 if (sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)) { 673 printk(KERN_CRIT "inet6_proto_init: size fault\n"); 674 return -EINVAL; 675 } 676 677 err = proto_register(&tcpv6_prot, 1); 678 if (err) 679 goto out; 680 681 err = proto_register(&udpv6_prot, 1); 682 if (err) 683 goto out_unregister_tcp_proto; 684 685 err = proto_register(&rawv6_prot, 1); 686 if (err) 687 goto out_unregister_udp_proto; 688 689 690 /* Register the socket-side information for inet6_create. */ 691 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) 692 INIT_LIST_HEAD(r); 693 694 /* We MUST register RAW sockets before we create the ICMP6, 695 * IGMP6, or NDISC control sockets. 696 */ 697 inet6_register_protosw(&rawv6_protosw); 698 699 /* Register the family here so that the init calls below will 700 * be able to create sockets. (?? is this dangerous ??) 701 */ 702 (void) sock_register(&inet6_family_ops); 703 704 /* Initialise ipv6 mibs */ 705 err = init_ipv6_mibs(); 706 if (err) 707 goto out_unregister_raw_proto; 708 709 /* 710 * ipngwg API draft makes clear that the correct semantics 711 * for TCP and UDP is to consider one TCP and UDP instance 712 * in a host availiable by both INET and INET6 APIs and 713 * able to communicate via both network protocols. 714 */ 715 716 #ifdef CONFIG_SYSCTL 717 ipv6_sysctl_register(); 718 #endif 719 err = icmpv6_init(&inet6_family_ops); 720 if (err) 721 goto icmp_fail; 722 err = ndisc_init(&inet6_family_ops); 723 if (err) 724 goto ndisc_fail; 725 err = igmp6_init(&inet6_family_ops); 726 if (err) 727 goto igmp_fail; 728 err = ipv6_netfilter_init(); 729 if (err) 730 goto netfilter_fail; 731 /* Create /proc/foo6 entries. */ 732 #ifdef CONFIG_PROC_FS 733 err = -ENOMEM; 734 if (raw6_proc_init()) 735 goto proc_raw6_fail; 736 if (tcp6_proc_init()) 737 goto proc_tcp6_fail; 738 if (udp6_proc_init()) 739 goto proc_udp6_fail; 740 if (ipv6_misc_proc_init()) 741 goto proc_misc6_fail; 742 743 if (ac6_proc_init()) 744 goto proc_anycast6_fail; 745 if (if6_proc_init()) 746 goto proc_if6_fail; 747 #endif 748 ip6_route_init(); 749 ip6_flowlabel_init(); 750 err = addrconf_init(); 751 if (err) 752 goto addrconf_fail; 753 sit_init(); 754 755 /* Init v6 extension headers. */ 756 ipv6_rthdr_init(); 757 ipv6_frag_init(); 758 ipv6_nodata_init(); 759 ipv6_destopt_init(); 760 761 /* Init v6 transport protocols. */ 762 udpv6_init(); 763 tcpv6_init(); 764 765 ipv6_packet_init(); 766 err = 0; 767 out: 768 return err; 769 770 addrconf_fail: 771 ip6_flowlabel_cleanup(); 772 ip6_route_cleanup(); 773 #ifdef CONFIG_PROC_FS 774 if6_proc_exit(); 775 proc_if6_fail: 776 ac6_proc_exit(); 777 proc_anycast6_fail: 778 ipv6_misc_proc_exit(); 779 proc_misc6_fail: 780 udp6_proc_exit(); 781 proc_udp6_fail: 782 tcp6_proc_exit(); 783 proc_tcp6_fail: 784 raw6_proc_exit(); 785 proc_raw6_fail: 786 #endif 787 ipv6_netfilter_fini(); 788 netfilter_fail: 789 igmp6_cleanup(); 790 igmp_fail: 791 ndisc_cleanup(); 792 ndisc_fail: 793 icmpv6_cleanup(); 794 icmp_fail: 795 #ifdef CONFIG_SYSCTL 796 ipv6_sysctl_unregister(); 797 #endif 798 cleanup_ipv6_mibs(); 799 out_unregister_raw_proto: 800 proto_unregister(&rawv6_prot); 801 out_unregister_udp_proto: 802 proto_unregister(&udpv6_prot); 803 out_unregister_tcp_proto: 804 proto_unregister(&tcpv6_prot); 805 goto out; 806 } 807 module_init(inet6_init); 808 809 static void __exit inet6_exit(void) 810 { 811 /* First of all disallow new sockets creation. */ 812 sock_unregister(PF_INET6); 813 #ifdef CONFIG_PROC_FS 814 if6_proc_exit(); 815 ac6_proc_exit(); 816 ipv6_misc_proc_exit(); 817 udp6_proc_exit(); 818 tcp6_proc_exit(); 819 raw6_proc_exit(); 820 #endif 821 /* Cleanup code parts. */ 822 sit_cleanup(); 823 ip6_flowlabel_cleanup(); 824 addrconf_cleanup(); 825 ip6_route_cleanup(); 826 ipv6_packet_cleanup(); 827 igmp6_cleanup(); 828 ipv6_netfilter_fini(); 829 ndisc_cleanup(); 830 icmpv6_cleanup(); 831 #ifdef CONFIG_SYSCTL 832 ipv6_sysctl_unregister(); 833 #endif 834 cleanup_ipv6_mibs(); 835 proto_unregister(&rawv6_prot); 836 proto_unregister(&udpv6_prot); 837 proto_unregister(&tcpv6_prot); 838 } 839 module_exit(inet6_exit); 840 841 MODULE_ALIAS_NETPROTO(PF_INET6); 842