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[NETLINK]: Add properly module refcounting for kernel netlink sockets.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv6 / af_inet6.c
CommitLineData
1da177e4
LT		 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>
1da177e4
LT		 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
48#include <net/ip.h>
49#include <net/ipv6.h>
50#include <net/udp.h>
51#include <net/tcp.h>
52#include <net/ipip.h>
53#include <net/protocol.h>
54#include <net/inet_common.h>
55#include <net/transp_v6.h>
56#include <net/ip6_route.h>
57#include <net/addrconf.h>
58#ifdef CONFIG_IPV6_TUNNEL
59#include <net/ip6_tunnel.h>
60#endif
61
62#include <asm/uaccess.h>
63#include <asm/system.h>
64
65MODULE_AUTHOR("Cast of dozens");
66MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
67MODULE_LICENSE("GPL");
68
69/* IPv6 procfs goodies... */
70
71#ifdef CONFIG_PROC_FS
72extern int raw6_proc_init(void);
73extern void raw6_proc_exit(void);
74extern int tcp6_proc_init(void);
75extern void tcp6_proc_exit(void);
76extern int udp6_proc_init(void);
77extern void udp6_proc_exit(void);
78extern int ipv6_misc_proc_init(void);
79extern void ipv6_misc_proc_exit(void);
80extern int ac6_proc_init(void);
81extern void ac6_proc_exit(void);
82extern int if6_proc_init(void);
83extern void if6_proc_exit(void);
84#endif
85
86int sysctl_ipv6_bindv6only;
87
88#ifdef INET_REFCNT_DEBUG
89atomic_t inet6_sock_nr;
edec231a 90EXPORT_SYMBOL(inet6_sock_nr);
1da177e4
LT		 91#endif
92
93/* The inetsw table contains everything that inet_create needs to
94 * build a new socket.
95 */
96static struct list_head inetsw6[SOCK_MAX];
97static DEFINE_SPINLOCK(inetsw6_lock);
98
99static 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
108static __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
115static 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 }
236out:
237 return rc;
238out_rcu_unlock:
239 rcu_read_unlock();
240 goto out;
241}
242
243
244/* bind for INET6 API */
245int 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;
349out:
350 release_sock(sk);
351 return err;
352}
353
354int 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
370int 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
402int 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
437int 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
468struct 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
489struct 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
510static 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
517extern void ipv6_sysctl_register(void);
518extern void ipv6_sysctl_unregister(void);
519#endif
520
521/* Same as inet6_dgram_ops, sans udp_poll. */
522static 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
543static 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
553void
554inet6_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);
591out:
592 spin_unlock_bh(&inetsw6_lock);
593 return;
594
595out_permanent:
596 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
597 protocol);
598 goto out;
599
600out_illegal:
601 printk(KERN_ERR
602 "Ignoring attempt to register invalid socket type %d.\n",
603 p->type);
604 goto out;
605}
606
607void
608inet6_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
623int
624snmp6_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
639err1:
640 free_percpu(ptr[0]);
641 ptr[0] = NULL;
642err0:
643 return -ENOMEM;
644}
645
646void
647snmp6_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
658static 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
671err_udp_mib:
672 snmp6_mib_free((void **)icmpv6_statistics);
673err_icmp_mib:
674 snmp6_mib_free((void **)ipv6_statistics);
675err_ip_mib:
676 return -ENOMEM;
677
678}
679
680static 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
687extern int ipv6_misc_proc_init(void);
688
689static 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
1da177e4
LT		 777 ip6_route_init();
778 ip6_flowlabel_init();
779 err = addrconf_init();
780 if (err)
781 goto addrconf_fail;
782 sit_init();
783
784 /* Init v6 extension headers. */
785 ipv6_rthdr_init();
786 ipv6_frag_init();
787 ipv6_nodata_init();
788 ipv6_destopt_init();
789
790 /* Init v6 transport protocols. */
791 udpv6_init();
792 tcpv6_init();
e2ed4052
HX		 793
794 ipv6_packet_init();
1da177e4
LT		 795 err = 0;
796out:
797 return err;
798
799addrconf_fail:
800 ip6_flowlabel_cleanup();
801 ip6_route_cleanup();
1da177e4
LT		 802#ifdef CONFIG_PROC_FS
803 if6_proc_exit();
804proc_if6_fail:
805 ac6_proc_exit();
806proc_anycast6_fail:
807 ipv6_misc_proc_exit();
808proc_misc6_fail:
809 udp6_proc_exit();
810proc_udp6_fail:
811 tcp6_proc_exit();
812proc_tcp6_fail:
813 raw6_proc_exit();
814proc_raw6_fail:
815#endif
816 igmp6_cleanup();
817igmp_fail:
818 ndisc_cleanup();
819ndisc_fail:
820 icmpv6_cleanup();
821icmp_fail:
822#ifdef CONFIG_SYSCTL
823 ipv6_sysctl_unregister();
824#endif
825 cleanup_ipv6_mibs();
826out_unregister_raw_proto:
827 proto_unregister(&rawv6_prot);
828out_unregister_udp_proto:
829 proto_unregister(&udpv6_prot);
830out_unregister_tcp_proto:
831 proto_unregister(&tcpv6_prot);
832 goto out;
833}
834module_init(inet6_init);
835
836static 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}
865module_exit(inet6_exit);
866
867MODULE_ALIAS_NETPROTO(PF_INET6);
kernel source for telekom puls (alcatel/mediatek)