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/major.h> 32 #include <linux/sched.h> 33 #include <linux/timer.h> 34 #include <linux/string.h> 35 #include <linux/sockios.h> 36 #include <linux/net.h> 37 #include <linux/fcntl.h> 38 #include <linux/mm.h> 39 #include <linux/interrupt.h> 40 #include <linux/proc_fs.h> 41 #include <linux/stat.h> 42 #include <linux/init.h> 43 44 #include <linux/inet.h> 45 #include <linux/netdevice.h> 46 #include <linux/icmpv6.h> 47 #include <linux/smp_lock.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 /* IPv6 procfs goodies... */ 71 72 #ifdef CONFIG_PROC_FS 73 extern int raw6_proc_init(void); 74 extern void raw6_proc_exit(void); 75 extern int tcp6_proc_init(void); 76 extern void tcp6_proc_exit(void); 77 extern int udp6_proc_init(void); 78 extern void udp6_proc_exit(void); 79 extern int ipv6_misc_proc_init(void); 80 extern void ipv6_misc_proc_exit(void); 81 extern int ac6_proc_init(void); 82 extern void ac6_proc_exit(void); 83 extern int if6_proc_init(void); 84 extern void if6_proc_exit(void); 85 #endif 86 87 int sysctl_ipv6_bindv6only; 88 89 #ifdef INET_REFCNT_DEBUG 90 atomic_t inet6_sock_nr; 91 #endif 92 93 /* The inetsw table contains everything that inet_create needs to 94 * build a new socket. 95 */ 96 static struct list_head inetsw6[SOCK_MAX]; 97 static DEFINE_SPINLOCK(inetsw6_lock); 98 99 static void inet6_sock_destruct(struct sock *sk) 100 { 101 inet_sock_destruct(sk); 102 103 #ifdef INET_REFCNT_DEBUG 104 atomic_dec(&inet6_sock_nr); 105 #endif 106 } 107 108 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) 109 { 110 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); 111 112 return (struct ipv6_pinfo *)(((u8 *)sk) + offset); 113 } 114 115 static int inet6_create(struct socket *sock, int protocol) 116 { 117 struct inet_sock *inet; 118 struct ipv6_pinfo *np; 119 struct sock *sk; 120 struct list_head *p; 121 struct inet_protosw *answer; 122 struct proto *answer_prot; 123 unsigned char answer_flags; 124 char answer_no_check; 125 int rc; 126 127 /* Look for the requested type/protocol pair. */ 128 answer = NULL; 129 rcu_read_lock(); 130 list_for_each_rcu(p, &inetsw6[sock->type]) { 131 answer = list_entry(p, struct inet_protosw, list); 132 133 /* Check the non-wild match. */ 134 if (protocol == answer->protocol) { 135 if (protocol != IPPROTO_IP) 136 break; 137 } else { 138 /* Check for the two wild cases. */ 139 if (IPPROTO_IP == protocol) { 140 protocol = answer->protocol; 141 break; 142 } 143 if (IPPROTO_IP == answer->protocol) 144 break; 145 } 146 answer = NULL; 147 } 148 149 rc = -ESOCKTNOSUPPORT; 150 if (!answer) 151 goto out_rcu_unlock; 152 rc = -EPERM; 153 if (answer->capability > 0 && !capable(answer->capability)) 154 goto out_rcu_unlock; 155 rc = -EPROTONOSUPPORT; 156 if (!protocol) 157 goto out_rcu_unlock; 158 159 sock->ops = answer->ops; 160 161 answer_prot = answer->prot; 162 answer_no_check = answer->no_check; 163 answer_flags = answer->flags; 164 rcu_read_unlock(); 165 166 BUG_TRAP(answer_prot->slab != NULL); 167 168 rc = -ENOBUFS; 169 sk = sk_alloc(PF_INET6, GFP_KERNEL, answer_prot, 1); 170 if (sk == NULL) 171 goto out; 172 173 sock_init_data(sock, sk); 174 175 rc = 0; 176 sk->sk_no_check = answer_no_check; 177 if (INET_PROTOSW_REUSE & answer_flags) 178 sk->sk_reuse = 1; 179 180 inet = inet_sk(sk); 181 182 if (SOCK_RAW == sock->type) { 183 inet->num = protocol; 184 if (IPPROTO_RAW == protocol) 185 inet->hdrincl = 1; 186 } 187 188 sk->sk_destruct = inet6_sock_destruct; 189 sk->sk_family = PF_INET6; 190 sk->sk_protocol = protocol; 191 192 sk->sk_backlog_rcv = answer->prot->backlog_rcv; 193 194 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); 195 np->hop_limit = -1; 196 np->mcast_hops = -1; 197 np->mc_loop = 1; 198 np->pmtudisc = IPV6_PMTUDISC_WANT; 199 np->ipv6only = sysctl_ipv6_bindv6only; 200 201 /* Init the ipv4 part of the socket since we can have sockets 202 * using v6 API for ipv4. 203 */ 204 inet->uc_ttl = -1; 205 206 inet->mc_loop = 1; 207 inet->mc_ttl = 1; 208 inet->mc_index = 0; 209 inet->mc_list = NULL; 210 211 if (ipv4_config.no_pmtu_disc) 212 inet->pmtudisc = IP_PMTUDISC_DONT; 213 else 214 inet->pmtudisc = IP_PMTUDISC_WANT; 215 216 217 #ifdef INET_REFCNT_DEBUG 218 atomic_inc(&inet6_sock_nr); 219 atomic_inc(&inet_sock_nr); 220 #endif 221 if (inet->num) { 222 /* It assumes that any protocol which allows 223 * the user to assign a number at socket 224 * creation time automatically shares. 225 */ 226 inet->sport = ntohs(inet->num); 227 sk->sk_prot->hash(sk); 228 } 229 if (sk->sk_prot->init) { 230 rc = sk->sk_prot->init(sk); 231 if (rc) { 232 sk_common_release(sk); 233 goto out; 234 } 235 } 236 out: 237 return rc; 238 out_rcu_unlock: 239 rcu_read_unlock(); 240 goto out; 241 } 242 243 244 /* bind for INET6 API */ 245 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 246 { 247 struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr; 248 struct sock *sk = sock->sk; 249 struct inet_sock *inet = inet_sk(sk); 250 struct ipv6_pinfo *np = inet6_sk(sk); 251 __u32 v4addr = 0; 252 unsigned short snum; 253 int addr_type = 0; 254 int err = 0; 255 256 /* If the socket has its own bind function then use it. */ 257 if (sk->sk_prot->bind) 258 return sk->sk_prot->bind(sk, uaddr, addr_len); 259 260 if (addr_len < SIN6_LEN_RFC2133) 261 return -EINVAL; 262 addr_type = ipv6_addr_type(&addr->sin6_addr); 263 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) 264 return -EINVAL; 265 266 snum = ntohs(addr->sin6_port); 267 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 268 return -EACCES; 269 270 lock_sock(sk); 271 272 /* Check these errors (active socket, double bind). */ 273 if (sk->sk_state != TCP_CLOSE || inet->num) { 274 err = -EINVAL; 275 goto out; 276 } 277 278 /* Check if the address belongs to the host. */ 279 if (addr_type == IPV6_ADDR_MAPPED) { 280 v4addr = addr->sin6_addr.s6_addr32[3]; 281 if (inet_addr_type(v4addr) != RTN_LOCAL) { 282 err = -EADDRNOTAVAIL; 283 goto out; 284 } 285 } else { 286 if (addr_type != IPV6_ADDR_ANY) { 287 struct net_device *dev = NULL; 288 289 if (addr_type & IPV6_ADDR_LINKLOCAL) { 290 if (addr_len >= sizeof(struct sockaddr_in6) && 291 addr->sin6_scope_id) { 292 /* Override any existing binding, if another one 293 * is supplied by user. 294 */ 295 sk->sk_bound_dev_if = addr->sin6_scope_id; 296 } 297 298 /* Binding to link-local address requires an interface */ 299 if (!sk->sk_bound_dev_if) { 300 err = -EINVAL; 301 goto out; 302 } 303 dev = dev_get_by_index(sk->sk_bound_dev_if); 304 if (!dev) { 305 err = -ENODEV; 306 goto out; 307 } 308 } 309 310 /* ipv4 addr of the socket is invalid. Only the 311 * unspecified and mapped address have a v4 equivalent. 312 */ 313 v4addr = LOOPBACK4_IPV6; 314 if (!(addr_type & IPV6_ADDR_MULTICAST)) { 315 if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { 316 if (dev) 317 dev_put(dev); 318 err = -EADDRNOTAVAIL; 319 goto out; 320 } 321 } 322 if (dev) 323 dev_put(dev); 324 } 325 } 326 327 inet->rcv_saddr = v4addr; 328 inet->saddr = v4addr; 329 330 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); 331 332 if (!(addr_type & IPV6_ADDR_MULTICAST)) 333 ipv6_addr_copy(&np->saddr, &addr->sin6_addr); 334 335 /* Make sure we are allowed to bind here. */ 336 if (sk->sk_prot->get_port(sk, snum)) { 337 inet_reset_saddr(sk); 338 err = -EADDRINUSE; 339 goto out; 340 } 341 342 if (addr_type != IPV6_ADDR_ANY) 343 sk->sk_userlocks |= SOCK_BINDADDR_LOCK; 344 if (snum) 345 sk->sk_userlocks |= SOCK_BINDPORT_LOCK; 346 inet->sport = ntohs(inet->num); 347 inet->dport = 0; 348 inet->daddr = 0; 349 out: 350 release_sock(sk); 351 return err; 352 } 353 354 int inet6_release(struct socket *sock) 355 { 356 struct sock *sk = sock->sk; 357 358 if (sk == NULL) 359 return -EINVAL; 360 361 /* Free mc lists */ 362 ipv6_sock_mc_close(sk); 363 364 /* Free ac lists */ 365 ipv6_sock_ac_close(sk); 366 367 return inet_release(sock); 368 } 369 370 int inet6_destroy_sock(struct sock *sk) 371 { 372 struct ipv6_pinfo *np = inet6_sk(sk); 373 struct sk_buff *skb; 374 struct ipv6_txoptions *opt; 375 376 /* 377 * Release destination entry 378 */ 379 380 sk_dst_reset(sk); 381 382 /* Release rx options */ 383 384 if ((skb = xchg(&np->pktoptions, NULL)) != NULL) 385 kfree_skb(skb); 386 387 /* Free flowlabels */ 388 fl6_free_socklist(sk); 389 390 /* Free tx options */ 391 392 if ((opt = xchg(&np->opt, NULL)) != NULL) 393 sock_kfree_s(sk, opt, opt->tot_len); 394 395 return 0; 396 } 397 398 /* 399 * This does both peername and sockname. 400 */ 401 402 int inet6_getname(struct socket *sock, struct sockaddr *uaddr, 403 int *uaddr_len, int peer) 404 { 405 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr; 406 struct sock *sk = sock->sk; 407 struct inet_sock *inet = inet_sk(sk); 408 struct ipv6_pinfo *np = inet6_sk(sk); 409 410 sin->sin6_family = AF_INET6; 411 sin->sin6_flowinfo = 0; 412 sin->sin6_scope_id = 0; 413 if (peer) { 414 if (!inet->dport) 415 return -ENOTCONN; 416 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && 417 peer == 1) 418 return -ENOTCONN; 419 sin->sin6_port = inet->dport; 420 ipv6_addr_copy(&sin->sin6_addr, &np->daddr); 421 if (np->sndflow) 422 sin->sin6_flowinfo = np->flow_label; 423 } else { 424 if (ipv6_addr_any(&np->rcv_saddr)) 425 ipv6_addr_copy(&sin->sin6_addr, &np->saddr); 426 else 427 ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr); 428 429 sin->sin6_port = inet->sport; 430 } 431 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) 432 sin->sin6_scope_id = sk->sk_bound_dev_if; 433 *uaddr_len = sizeof(*sin); 434 return(0); 435 } 436 437 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 438 { 439 struct sock *sk = sock->sk; 440 int err = -EINVAL; 441 442 switch(cmd) 443 { 444 case SIOCGSTAMP: 445 return sock_get_timestamp(sk, (struct timeval __user *)arg); 446 447 case SIOCADDRT: 448 case SIOCDELRT: 449 450 return(ipv6_route_ioctl(cmd,(void __user *)arg)); 451 452 case SIOCSIFADDR: 453 return addrconf_add_ifaddr((void __user *) arg); 454 case SIOCDIFADDR: 455 return addrconf_del_ifaddr((void __user *) arg); 456 case SIOCSIFDSTADDR: 457 return addrconf_set_dstaddr((void __user *) arg); 458 default: 459 if (!sk->sk_prot->ioctl || 460 (err = sk->sk_prot->ioctl(sk, cmd, arg)) == -ENOIOCTLCMD) 461 return(dev_ioctl(cmd,(void __user *) arg)); 462 return err; 463 } 464 /*NOTREACHED*/ 465 return(0); 466 } 467 468 struct proto_ops inet6_stream_ops = { 469 .family = PF_INET6, 470 .owner = THIS_MODULE, 471 .release = inet6_release, 472 .bind = inet6_bind, 473 .connect = inet_stream_connect, /* ok */ 474 .socketpair = sock_no_socketpair, /* a do nothing */ 475 .accept = inet_accept, /* ok */ 476 .getname = inet6_getname, 477 .poll = tcp_poll, /* ok */ 478 .ioctl = inet6_ioctl, /* must change */ 479 .listen = inet_listen, /* ok */ 480 .shutdown = inet_shutdown, /* ok */ 481 .setsockopt = sock_common_setsockopt, /* ok */ 482 .getsockopt = sock_common_getsockopt, /* ok */ 483 .sendmsg = inet_sendmsg, /* ok */ 484 .recvmsg = sock_common_recvmsg, /* ok */ 485 .mmap = sock_no_mmap, 486 .sendpage = tcp_sendpage 487 }; 488 489 struct proto_ops inet6_dgram_ops = { 490 .family = PF_INET6, 491 .owner = THIS_MODULE, 492 .release = inet6_release, 493 .bind = inet6_bind, 494 .connect = inet_dgram_connect, /* ok */ 495 .socketpair = sock_no_socketpair, /* a do nothing */ 496 .accept = sock_no_accept, /* a do nothing */ 497 .getname = inet6_getname, 498 .poll = udp_poll, /* ok */ 499 .ioctl = inet6_ioctl, /* must change */ 500 .listen = sock_no_listen, /* ok */ 501 .shutdown = inet_shutdown, /* ok */ 502 .setsockopt = sock_common_setsockopt, /* ok */ 503 .getsockopt = sock_common_getsockopt, /* ok */ 504 .sendmsg = inet_sendmsg, /* ok */ 505 .recvmsg = sock_common_recvmsg, /* ok */ 506 .mmap = sock_no_mmap, 507 .sendpage = sock_no_sendpage, 508 }; 509 510 static struct net_proto_family inet6_family_ops = { 511 .family = PF_INET6, 512 .create = inet6_create, 513 .owner = THIS_MODULE, 514 }; 515 516 #ifdef CONFIG_SYSCTL 517 extern void ipv6_sysctl_register(void); 518 extern void ipv6_sysctl_unregister(void); 519 #endif 520 521 /* Same as inet6_dgram_ops, sans udp_poll. */ 522 static struct proto_ops inet6_sockraw_ops = { 523 .family = PF_INET6, 524 .owner = THIS_MODULE, 525 .release = inet6_release, 526 .bind = inet6_bind, 527 .connect = inet_dgram_connect, /* ok */ 528 .socketpair = sock_no_socketpair, /* a do nothing */ 529 .accept = sock_no_accept, /* a do nothing */ 530 .getname = inet6_getname, 531 .poll = datagram_poll, /* ok */ 532 .ioctl = inet6_ioctl, /* must change */ 533 .listen = sock_no_listen, /* ok */ 534 .shutdown = inet_shutdown, /* ok */ 535 .setsockopt = sock_common_setsockopt, /* ok */ 536 .getsockopt = sock_common_getsockopt, /* ok */ 537 .sendmsg = inet_sendmsg, /* ok */ 538 .recvmsg = sock_common_recvmsg, /* ok */ 539 .mmap = sock_no_mmap, 540 .sendpage = sock_no_sendpage, 541 }; 542 543 static struct inet_protosw rawv6_protosw = { 544 .type = SOCK_RAW, 545 .protocol = IPPROTO_IP, /* wild card */ 546 .prot = &rawv6_prot, 547 .ops = &inet6_sockraw_ops, 548 .capability = CAP_NET_RAW, 549 .no_check = UDP_CSUM_DEFAULT, 550 .flags = INET_PROTOSW_REUSE, 551 }; 552 553 void 554 inet6_register_protosw(struct inet_protosw *p) 555 { 556 struct list_head *lh; 557 struct inet_protosw *answer; 558 int protocol = p->protocol; 559 struct list_head *last_perm; 560 561 spin_lock_bh(&inetsw6_lock); 562 563 if (p->type >= SOCK_MAX) 564 goto out_illegal; 565 566 /* If we are trying to override a permanent protocol, bail. */ 567 answer = NULL; 568 last_perm = &inetsw6[p->type]; 569 list_for_each(lh, &inetsw6[p->type]) { 570 answer = list_entry(lh, struct inet_protosw, list); 571 572 /* Check only the non-wild match. */ 573 if (INET_PROTOSW_PERMANENT & answer->flags) { 574 if (protocol == answer->protocol) 575 break; 576 last_perm = lh; 577 } 578 579 answer = NULL; 580 } 581 if (answer) 582 goto out_permanent; 583 584 /* Add the new entry after the last permanent entry if any, so that 585 * the new entry does not override a permanent entry when matched with 586 * a wild-card protocol. But it is allowed to override any existing 587 * non-permanent entry. This means that when we remove this entry, the 588 * system automatically returns to the old behavior. 589 */ 590 list_add_rcu(&p->list, last_perm); 591 out: 592 spin_unlock_bh(&inetsw6_lock); 593 return; 594 595 out_permanent: 596 printk(KERN_ERR "Attempt to override permanent protocol %d.\n", 597 protocol); 598 goto out; 599 600 out_illegal: 601 printk(KERN_ERR 602 "Ignoring attempt to register invalid socket type %d.\n", 603 p->type); 604 goto out; 605 } 606 607 void 608 inet6_unregister_protosw(struct inet_protosw *p) 609 { 610 if (INET_PROTOSW_PERMANENT & p->flags) { 611 printk(KERN_ERR 612 "Attempt to unregister permanent protocol %d.\n", 613 p->protocol); 614 } else { 615 spin_lock_bh(&inetsw6_lock); 616 list_del_rcu(&p->list); 617 spin_unlock_bh(&inetsw6_lock); 618 619 synchronize_net(); 620 } 621 } 622 623 int 624 snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign) 625 { 626 if (ptr == NULL) 627 return -EINVAL; 628 629 ptr[0] = __alloc_percpu(mibsize, mibalign); 630 if (!ptr[0]) 631 goto err0; 632 633 ptr[1] = __alloc_percpu(mibsize, mibalign); 634 if (!ptr[1]) 635 goto err1; 636 637 return 0; 638 639 err1: 640 free_percpu(ptr[0]); 641 ptr[0] = NULL; 642 err0: 643 return -ENOMEM; 644 } 645 646 void 647 snmp6_mib_free(void *ptr[2]) 648 { 649 if (ptr == NULL) 650 return; 651 if (ptr[0]) 652 free_percpu(ptr[0]); 653 if (ptr[1]) 654 free_percpu(ptr[1]); 655 ptr[0] = ptr[1] = NULL; 656 } 657 658 static int __init init_ipv6_mibs(void) 659 { 660 if (snmp6_mib_init((void **)ipv6_statistics, sizeof (struct ipstats_mib), 661 __alignof__(struct ipstats_mib)) < 0) 662 goto err_ip_mib; 663 if (snmp6_mib_init((void **)icmpv6_statistics, sizeof (struct icmpv6_mib), 664 __alignof__(struct icmpv6_mib)) < 0) 665 goto err_icmp_mib; 666 if (snmp6_mib_init((void **)udp_stats_in6, sizeof (struct udp_mib), 667 __alignof__(struct udp_mib)) < 0) 668 goto err_udp_mib; 669 return 0; 670 671 err_udp_mib: 672 snmp6_mib_free((void **)icmpv6_statistics); 673 err_icmp_mib: 674 snmp6_mib_free((void **)ipv6_statistics); 675 err_ip_mib: 676 return -ENOMEM; 677 678 } 679 680 static void cleanup_ipv6_mibs(void) 681 { 682 snmp6_mib_free((void **)ipv6_statistics); 683 snmp6_mib_free((void **)icmpv6_statistics); 684 snmp6_mib_free((void **)udp_stats_in6); 685 } 686 687 extern int ipv6_misc_proc_init(void); 688 689 static int __init inet6_init(void) 690 { 691 struct sk_buff *dummy_skb; 692 struct list_head *r; 693 int err; 694 695 #ifdef MODULE 696 #if 0 /* FIXME --RR */ 697 if (!mod_member_present(&__this_module, can_unload)) 698 return -EINVAL; 699 700 __this_module.can_unload = &ipv6_unload; 701 #endif 702 #endif 703 704 if (sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)) { 705 printk(KERN_CRIT "inet6_proto_init: size fault\n"); 706 return -EINVAL; 707 } 708 709 err = proto_register(&tcpv6_prot, 1); 710 if (err) 711 goto out; 712 713 err = proto_register(&udpv6_prot, 1); 714 if (err) 715 goto out_unregister_tcp_proto; 716 717 err = proto_register(&rawv6_prot, 1); 718 if (err) 719 goto out_unregister_udp_proto; 720 721 722 /* Register the socket-side information for inet6_create. */ 723 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) 724 INIT_LIST_HEAD(r); 725 726 /* We MUST register RAW sockets before we create the ICMP6, 727 * IGMP6, or NDISC control sockets. 728 */ 729 inet6_register_protosw(&rawv6_protosw); 730 731 /* Register the family here so that the init calls below will 732 * be able to create sockets. (?? is this dangerous ??) 733 */ 734 (void) sock_register(&inet6_family_ops); 735 736 /* Initialise ipv6 mibs */ 737 err = init_ipv6_mibs(); 738 if (err) 739 goto out_unregister_raw_proto; 740 741 /* 742 * ipngwg API draft makes clear that the correct semantics 743 * for TCP and UDP is to consider one TCP and UDP instance 744 * in a host availiable by both INET and INET6 APIs and 745 * able to communicate via both network protocols. 746 */ 747 748 #ifdef CONFIG_SYSCTL 749 ipv6_sysctl_register(); 750 #endif 751 err = icmpv6_init(&inet6_family_ops); 752 if (err) 753 goto icmp_fail; 754 err = ndisc_init(&inet6_family_ops); 755 if (err) 756 goto ndisc_fail; 757 err = igmp6_init(&inet6_family_ops); 758 if (err) 759 goto igmp_fail; 760 /* Create /proc/foo6 entries. */ 761 #ifdef CONFIG_PROC_FS 762 err = -ENOMEM; 763 if (raw6_proc_init()) 764 goto proc_raw6_fail; 765 if (tcp6_proc_init()) 766 goto proc_tcp6_fail; 767 if (udp6_proc_init()) 768 goto proc_udp6_fail; 769 if (ipv6_misc_proc_init()) 770 goto proc_misc6_fail; 771 772 if (ac6_proc_init()) 773 goto proc_anycast6_fail; 774 if (if6_proc_init()) 775 goto proc_if6_fail; 776 #endif 777 ipv6_packet_init(); 778 ip6_route_init(); 779 ip6_flowlabel_init(); 780 err = addrconf_init(); 781 if (err) 782 goto addrconf_fail; 783 sit_init(); 784 785 /* Init v6 extension headers. */ 786 ipv6_rthdr_init(); 787 ipv6_frag_init(); 788 ipv6_nodata_init(); 789 ipv6_destopt_init(); 790 791 /* Init v6 transport protocols. */ 792 udpv6_init(); 793 tcpv6_init(); 794 err = 0; 795 out: 796 return err; 797 798 addrconf_fail: 799 ip6_flowlabel_cleanup(); 800 ip6_route_cleanup(); 801 ipv6_packet_cleanup(); 802 #ifdef CONFIG_PROC_FS 803 if6_proc_exit(); 804 proc_if6_fail: 805 ac6_proc_exit(); 806 proc_anycast6_fail: 807 ipv6_misc_proc_exit(); 808 proc_misc6_fail: 809 udp6_proc_exit(); 810 proc_udp6_fail: 811 tcp6_proc_exit(); 812 proc_tcp6_fail: 813 raw6_proc_exit(); 814 proc_raw6_fail: 815 #endif 816 igmp6_cleanup(); 817 igmp_fail: 818 ndisc_cleanup(); 819 ndisc_fail: 820 icmpv6_cleanup(); 821 icmp_fail: 822 #ifdef CONFIG_SYSCTL 823 ipv6_sysctl_unregister(); 824 #endif 825 cleanup_ipv6_mibs(); 826 out_unregister_raw_proto: 827 proto_unregister(&rawv6_prot); 828 out_unregister_udp_proto: 829 proto_unregister(&udpv6_prot); 830 out_unregister_tcp_proto: 831 proto_unregister(&tcpv6_prot); 832 goto out; 833 } 834 module_init(inet6_init); 835 836 static void __exit inet6_exit(void) 837 { 838 /* First of all disallow new sockets creation. */ 839 sock_unregister(PF_INET6); 840 #ifdef CONFIG_PROC_FS 841 if6_proc_exit(); 842 ac6_proc_exit(); 843 ipv6_misc_proc_exit(); 844 udp6_proc_exit(); 845 tcp6_proc_exit(); 846 raw6_proc_exit(); 847 #endif 848 /* Cleanup code parts. */ 849 sit_cleanup(); 850 ip6_flowlabel_cleanup(); 851 addrconf_cleanup(); 852 ip6_route_cleanup(); 853 ipv6_packet_cleanup(); 854 igmp6_cleanup(); 855 ndisc_cleanup(); 856 icmpv6_cleanup(); 857 #ifdef CONFIG_SYSCTL 858 ipv6_sysctl_unregister(); 859 #endif 860 cleanup_ipv6_mibs(); 861 proto_unregister(&rawv6_prot); 862 proto_unregister(&udpv6_prot); 863 proto_unregister(&tcpv6_prot); 864 } 865 module_exit(inet6_exit); 866 867 MODULE_ALIAS_NETPROTO(PF_INET6); 868