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x86: add PAGE_KERNEL_EXEC_NOCACHE
[wrt350n-kernel.git] / net / ipv6 / af_inet6.c
blobbddac0e8780f948f75b8de3d4fdb25e280080a2b
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/capability.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/timer.h>
32 #include <linux/string.h>
33 #include <linux/sockios.h>
34 #include <linux/net.h>
35 #include <linux/fcntl.h>
36 #include <linux/mm.h>
37 #include <linux/interrupt.h>
38 #include <linux/proc_fs.h>
39 #include <linux/stat.h>
40 #include <linux/init.h>
41
42 #include <linux/inet.h>
43 #include <linux/netdevice.h>
44 #include <linux/icmpv6.h>
45 #include <linux/netfilter_ipv6.h>
46
47 #include <net/ip.h>
48 #include <net/ipv6.h>
49 #include <net/udp.h>
50 #include <net/udplite.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
65 MODULE_AUTHOR("Cast of dozens");
66 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
67 MODULE_LICENSE("GPL");
68
69 /* The inetsw6 table contains everything that inet6_create needs to
70 * build a new socket.
71 */
72 static struct list_head inetsw6[SOCK_MAX];
73 static DEFINE_SPINLOCK(inetsw6_lock);
74
75 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
76 {
77 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
78
79 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
80 }
81
82 static int inet6_create(struct net *net, struct socket *sock, int protocol)
83 {
84 struct inet_sock *inet;
85 struct ipv6_pinfo *np;
86 struct sock *sk;
87 struct list_head *p;
88 struct inet_protosw *answer;
89 struct proto *answer_prot;
90 unsigned char answer_flags;
91 char answer_no_check;
92 int try_loading_module = 0;
93 int err;
94
95 if (net != &init_net)
96 return -EAFNOSUPPORT;
97
98 if (sock->type != SOCK_RAW &&
99 sock->type != SOCK_DGRAM &&
100 !inet_ehash_secret)
101 build_ehash_secret();
102
103 /* Look for the requested type/protocol pair. */
104 answer = NULL;
105 lookup_protocol:
106 err = -ESOCKTNOSUPPORT;
107 rcu_read_lock();
108 list_for_each_rcu(p, &inetsw6[sock->type]) {
109 answer = list_entry(p, struct inet_protosw, list);
110
111 /* Check the non-wild match. */
112 if (protocol == answer->protocol) {
113 if (protocol != IPPROTO_IP)
114 break;
115 } else {
116 /* Check for the two wild cases. */
117 if (IPPROTO_IP == protocol) {
118 protocol = answer->protocol;
119 break;
120 }
121 if (IPPROTO_IP == answer->protocol)
122 break;
123 }
124 err = -EPROTONOSUPPORT;
125 answer = NULL;
126 }
127
128 if (!answer) {
129 if (try_loading_module < 2) {
130 rcu_read_unlock();
131 /*
132 * Be more specific, e.g. net-pf-10-proto-132-type-1
133 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
134 */
135 if (++try_loading_module == 1)
136 request_module("net-pf-%d-proto-%d-type-%d",
137 PF_INET6, protocol, sock->type);
138 /*
139 * Fall back to generic, e.g. net-pf-10-proto-132
140 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
141 */
142 else
143 request_module("net-pf-%d-proto-%d",
144 PF_INET6, protocol);
145 goto lookup_protocol;
146 } else
147 goto out_rcu_unlock;
148 }
149
150 err = -EPERM;
151 if (answer->capability > 0 && !capable(answer->capability))
152 goto out_rcu_unlock;
153
154 sock->ops = answer->ops;
155 answer_prot = answer->prot;
156 answer_no_check = answer->no_check;
157 answer_flags = answer->flags;
158 rcu_read_unlock();
159
160 BUG_TRAP(answer_prot->slab != NULL);
161
162 err = -ENOBUFS;
163 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
164 if (sk == NULL)
165 goto out;
166
167 sock_init_data(sock, sk);
168
169 err = 0;
170 sk->sk_no_check = answer_no_check;
171 if (INET_PROTOSW_REUSE & answer_flags)
172 sk->sk_reuse = 1;
173
174 inet = inet_sk(sk);
175 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
176
177 if (SOCK_RAW == sock->type) {
178 inet->num = protocol;
179 if (IPPROTO_RAW == protocol)
180 inet->hdrincl = 1;
181 }
182
183 sk->sk_destruct = inet_sock_destruct;
184 sk->sk_family = PF_INET6;
185 sk->sk_protocol = protocol;
186
187 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
188
189 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
190 np->hop_limit = -1;
191 np->mcast_hops = -1;
192 np->mc_loop = 1;
193 np->pmtudisc = IPV6_PMTUDISC_WANT;
194 np->ipv6only = init_net.ipv6.sysctl.bindv6only;
195
196 /* Init the ipv4 part of the socket since we can have sockets
197 * using v6 API for ipv4.
198 */
199 inet->uc_ttl = -1;
200
201 inet->mc_loop = 1;
202 inet->mc_ttl = 1;
203 inet->mc_index = 0;
204 inet->mc_list = NULL;
205
206 if (ipv4_config.no_pmtu_disc)
207 inet->pmtudisc = IP_PMTUDISC_DONT;
208 else
209 inet->pmtudisc = IP_PMTUDISC_WANT;
210 /*
211 * Increment only the relevant sk_prot->socks debug field, this changes
212 * the previous behaviour of incrementing both the equivalent to
213 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
214 *
215 * This allows better debug granularity as we'll know exactly how many
216 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
217 * transport protocol socks. -acme
218 */
219 sk_refcnt_debug_inc(sk);
220
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 = htons(inet->num);
227 sk->sk_prot->hash(sk);
228 }
229 if (sk->sk_prot->init) {
230 err = sk->sk_prot->init(sk);
231 if (err) {
232 sk_common_release(sk);
233 goto out;
234 }
235 }
236 out:
237 return err;
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 __be32 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(&init_net, 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(&init_net, 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(&init_net, &addr->sin6_addr,
316 dev, 0)) {
317 if (dev)
318 dev_put(dev);
319 err = -EADDRNOTAVAIL;
320 goto out;
321 }
322 }
323 if (dev)
324 dev_put(dev);
325 }
326 }
327
328 inet->rcv_saddr = v4addr;
329 inet->saddr = v4addr;
330
331 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
332
333 if (!(addr_type & IPV6_ADDR_MULTICAST))
334 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
335
336 /* Make sure we are allowed to bind here. */
337 if (sk->sk_prot->get_port(sk, snum)) {
338 inet_reset_saddr(sk);
339 err = -EADDRINUSE;
340 goto out;
341 }
342
343 if (addr_type != IPV6_ADDR_ANY)
344 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
345 if (snum)
346 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
347 inet->sport = htons(inet->num);
348 inet->dport = 0;
349 inet->daddr = 0;
350 out:
351 release_sock(sk);
352 return err;
353 }
354
355 EXPORT_SYMBOL(inet6_bind);
356
357 int inet6_release(struct socket *sock)
358 {
359 struct sock *sk = sock->sk;
360
361 if (sk == NULL)
362 return -EINVAL;
363
364 /* Free mc lists */
365 ipv6_sock_mc_close(sk);
366
367 /* Free ac lists */
368 ipv6_sock_ac_close(sk);
369
370 return inet_release(sock);
371 }
372
373 EXPORT_SYMBOL(inet6_release);
374
375 int inet6_destroy_sock(struct sock *sk)
376 {
377 struct ipv6_pinfo *np = inet6_sk(sk);
378 struct sk_buff *skb;
379 struct ipv6_txoptions *opt;
380
381 /* Release rx options */
382
383 if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
384 kfree_skb(skb);
385
386 /* Free flowlabels */
387 fl6_free_socklist(sk);
388
389 /* Free tx options */
390
391 if ((opt = xchg(&np->opt, NULL)) != NULL)
392 sock_kfree_s(sk, opt, opt->tot_len);
393
394 return 0;
395 }
396
397 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
398
399 /*
400 * This does both peername and sockname.
401 */
402
403 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
404 int *uaddr_len, int peer)
405 {
406 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
407 struct sock *sk = sock->sk;
408 struct inet_sock *inet = inet_sk(sk);
409 struct ipv6_pinfo *np = inet6_sk(sk);
410
411 sin->sin6_family = AF_INET6;
412 sin->sin6_flowinfo = 0;
413 sin->sin6_scope_id = 0;
414 if (peer) {
415 if (!inet->dport)
416 return -ENOTCONN;
417 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
418 peer == 1)
419 return -ENOTCONN;
420 sin->sin6_port = inet->dport;
421 ipv6_addr_copy(&sin->sin6_addr, &np->daddr);
422 if (np->sndflow)
423 sin->sin6_flowinfo = np->flow_label;
424 } else {
425 if (ipv6_addr_any(&np->rcv_saddr))
426 ipv6_addr_copy(&sin->sin6_addr, &np->saddr);
427 else
428 ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr);
429
430 sin->sin6_port = inet->sport;
431 }
432 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
433 sin->sin6_scope_id = sk->sk_bound_dev_if;
434 *uaddr_len = sizeof(*sin);
435 return(0);
436 }
437
438 EXPORT_SYMBOL(inet6_getname);
439
440 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
441 {
442 struct sock *sk = sock->sk;
443
444 switch(cmd)
445 {
446 case SIOCGSTAMP:
447 return sock_get_timestamp(sk, (struct timeval __user *)arg);
448
449 case SIOCGSTAMPNS:
450 return sock_get_timestampns(sk, (struct timespec __user *)arg);
451
452 case SIOCADDRT:
453 case SIOCDELRT:
454
455 return(ipv6_route_ioctl(cmd,(void __user *)arg));
456
457 case SIOCSIFADDR:
458 return addrconf_add_ifaddr((void __user *) arg);
459 case SIOCDIFADDR:
460 return addrconf_del_ifaddr((void __user *) arg);
461 case SIOCSIFDSTADDR:
462 return addrconf_set_dstaddr((void __user *) arg);
463 default:
464 if (!sk->sk_prot->ioctl)
465 return -ENOIOCTLCMD;
466 return sk->sk_prot->ioctl(sk, cmd, arg);
467 }
468 /*NOTREACHED*/
469 return(0);
470 }
471
472 EXPORT_SYMBOL(inet6_ioctl);
473
474 const struct proto_ops inet6_stream_ops = {
475 .family = PF_INET6,
476 .owner = THIS_MODULE,
477 .release = inet6_release,
478 .bind = inet6_bind,
479 .connect = inet_stream_connect, /* ok */
480 .socketpair = sock_no_socketpair, /* a do nothing */
481 .accept = inet_accept, /* ok */
482 .getname = inet6_getname,
483 .poll = tcp_poll, /* ok */
484 .ioctl = inet6_ioctl, /* must change */
485 .listen = inet_listen, /* ok */
486 .shutdown = inet_shutdown, /* ok */
487 .setsockopt = sock_common_setsockopt, /* ok */
488 .getsockopt = sock_common_getsockopt, /* ok */
489 .sendmsg = tcp_sendmsg, /* ok */
490 .recvmsg = sock_common_recvmsg, /* ok */
491 .mmap = sock_no_mmap,
492 .sendpage = tcp_sendpage,
493 .splice_read = tcp_splice_read,
494 #ifdef CONFIG_COMPAT
495 .compat_setsockopt = compat_sock_common_setsockopt,
496 .compat_getsockopt = compat_sock_common_getsockopt,
497 #endif
498 };
499
500 const struct proto_ops inet6_dgram_ops = {
501 .family = PF_INET6,
502 .owner = THIS_MODULE,
503 .release = inet6_release,
504 .bind = inet6_bind,
505 .connect = inet_dgram_connect, /* ok */
506 .socketpair = sock_no_socketpair, /* a do nothing */
507 .accept = sock_no_accept, /* a do nothing */
508 .getname = inet6_getname,
509 .poll = udp_poll, /* ok */
510 .ioctl = inet6_ioctl, /* must change */
511 .listen = sock_no_listen, /* ok */
512 .shutdown = inet_shutdown, /* ok */
513 .setsockopt = sock_common_setsockopt, /* ok */
514 .getsockopt = sock_common_getsockopt, /* ok */
515 .sendmsg = inet_sendmsg, /* ok */
516 .recvmsg = sock_common_recvmsg, /* ok */
517 .mmap = sock_no_mmap,
518 .sendpage = sock_no_sendpage,
519 #ifdef CONFIG_COMPAT
520 .compat_setsockopt = compat_sock_common_setsockopt,
521 .compat_getsockopt = compat_sock_common_getsockopt,
522 #endif
523 };
524
525 static struct net_proto_family inet6_family_ops = {
526 .family = PF_INET6,
527 .create = inet6_create,
528 .owner = THIS_MODULE,
529 };
530
531 int inet6_register_protosw(struct inet_protosw *p)
532 {
533 struct list_head *lh;
534 struct inet_protosw *answer;
535 struct list_head *last_perm;
536 int protocol = p->protocol;
537 int ret;
538
539 spin_lock_bh(&inetsw6_lock);
540
541 ret = -EINVAL;
542 if (p->type >= SOCK_MAX)
543 goto out_illegal;
544
545 /* If we are trying to override a permanent protocol, bail. */
546 answer = NULL;
547 ret = -EPERM;
548 last_perm = &inetsw6[p->type];
549 list_for_each(lh, &inetsw6[p->type]) {
550 answer = list_entry(lh, struct inet_protosw, list);
551
552 /* Check only the non-wild match. */
553 if (INET_PROTOSW_PERMANENT & answer->flags) {
554 if (protocol == answer->protocol)
555 break;
556 last_perm = lh;
557 }
558
559 answer = NULL;
560 }
561 if (answer)
562 goto out_permanent;
563
564 /* Add the new entry after the last permanent entry if any, so that
565 * the new entry does not override a permanent entry when matched with
566 * a wild-card protocol. But it is allowed to override any existing
567 * non-permanent entry. This means that when we remove this entry, the
568 * system automatically returns to the old behavior.
569 */
570 list_add_rcu(&p->list, last_perm);
571 ret = 0;
572 out:
573 spin_unlock_bh(&inetsw6_lock);
574 return ret;
575
576 out_permanent:
577 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
578 protocol);
579 goto out;
580
581 out_illegal:
582 printk(KERN_ERR
583 "Ignoring attempt to register invalid socket type %d.\n",
584 p->type);
585 goto out;
586 }
587
588 EXPORT_SYMBOL(inet6_register_protosw);
589
590 void
591 inet6_unregister_protosw(struct inet_protosw *p)
592 {
593 if (INET_PROTOSW_PERMANENT & p->flags) {
594 printk(KERN_ERR
595 "Attempt to unregister permanent protocol %d.\n",
596 p->protocol);
597 } else {
598 spin_lock_bh(&inetsw6_lock);
599 list_del_rcu(&p->list);
600 spin_unlock_bh(&inetsw6_lock);
601
602 synchronize_net();
603 }
604 }
605
606 EXPORT_SYMBOL(inet6_unregister_protosw);
607
608 int inet6_sk_rebuild_header(struct sock *sk)
609 {
610 int err;
611 struct dst_entry *dst;
612 struct ipv6_pinfo *np = inet6_sk(sk);
613
614 dst = __sk_dst_check(sk, np->dst_cookie);
615
616 if (dst == NULL) {
617 struct inet_sock *inet = inet_sk(sk);
618 struct in6_addr *final_p = NULL, final;
619 struct flowi fl;
620
621 memset(&fl, 0, sizeof(fl));
622 fl.proto = sk->sk_protocol;
623 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
624 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
625 fl.fl6_flowlabel = np->flow_label;
626 fl.oif = sk->sk_bound_dev_if;
627 fl.fl_ip_dport = inet->dport;
628 fl.fl_ip_sport = inet->sport;
629 security_sk_classify_flow(sk, &fl);
630
631 if (np->opt && np->opt->srcrt) {
632 struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
633 ipv6_addr_copy(&final, &fl.fl6_dst);
634 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
635 final_p = &final;
636 }
637
638 err = ip6_dst_lookup(sk, &dst, &fl);
639 if (err) {
640 sk->sk_route_caps = 0;
641 return err;
642 }
643 if (final_p)
644 ipv6_addr_copy(&fl.fl6_dst, final_p);
645
646 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
647 sk->sk_err_soft = -err;
648 return err;
649 }
650
651 __ip6_dst_store(sk, dst, NULL, NULL);
652 }
653
654 return 0;
655 }
656
657 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
658
659 int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
660 {
661 struct ipv6_pinfo *np = inet6_sk(sk);
662 struct inet6_skb_parm *opt = IP6CB(skb);
663
664 if (np->rxopt.all) {
665 if ((opt->hop && (np->rxopt.bits.hopopts ||
666 np->rxopt.bits.ohopopts)) ||
667 ((IPV6_FLOWINFO_MASK &
668 *(__be32 *)skb_network_header(skb)) &&
669 np->rxopt.bits.rxflow) ||
670 (opt->srcrt && (np->rxopt.bits.srcrt ||
671 np->rxopt.bits.osrcrt)) ||
672 ((opt->dst1 || opt->dst0) &&
673 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
674 return 1;
675 }
676 return 0;
677 }
678
679 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
680
681 static int __init init_ipv6_mibs(void)
682 {
683 if (snmp_mib_init((void **)ipv6_statistics,
684 sizeof(struct ipstats_mib)) < 0)
685 goto err_ip_mib;
686 if (snmp_mib_init((void **)icmpv6_statistics,
687 sizeof(struct icmpv6_mib)) < 0)
688 goto err_icmp_mib;
689 if (snmp_mib_init((void **)icmpv6msg_statistics,
690 sizeof(struct icmpv6msg_mib)) < 0)
691 goto err_icmpmsg_mib;
692 if (snmp_mib_init((void **)udp_stats_in6, sizeof (struct udp_mib)) < 0)
693 goto err_udp_mib;
694 if (snmp_mib_init((void **)udplite_stats_in6,
695 sizeof (struct udp_mib)) < 0)
696 goto err_udplite_mib;
697 return 0;
698
699 err_udplite_mib:
700 snmp_mib_free((void **)udp_stats_in6);
701 err_udp_mib:
702 snmp_mib_free((void **)icmpv6msg_statistics);
703 err_icmpmsg_mib:
704 snmp_mib_free((void **)icmpv6_statistics);
705 err_icmp_mib:
706 snmp_mib_free((void **)ipv6_statistics);
707 err_ip_mib:
708 return -ENOMEM;
709
710 }
711
712 static void cleanup_ipv6_mibs(void)
713 {
714 snmp_mib_free((void **)ipv6_statistics);
715 snmp_mib_free((void **)icmpv6_statistics);
716 snmp_mib_free((void **)icmpv6msg_statistics);
717 snmp_mib_free((void **)udp_stats_in6);
718 snmp_mib_free((void **)udplite_stats_in6);
719 }
720
721 static int inet6_net_init(struct net *net)
722 {
723 net->ipv6.sysctl.bindv6only = 0;
724 net->ipv6.sysctl.flush_delay = 0;
725 net->ipv6.sysctl.ip6_rt_max_size = 4096;
726 net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2;
727 net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ;
728 net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ;
729 net->ipv6.sysctl.ip6_rt_gc_elasticity = 9;
730 net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ;
731 net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40;
732 net->ipv6.sysctl.icmpv6_time = 1*HZ;
733
734 return 0;
735 }
736
737 static void inet6_net_exit(struct net *net)
738 {
739 return;
740 }
741
742 static struct pernet_operations inet6_net_ops = {
743 .init = inet6_net_init,
744 .exit = inet6_net_exit,
745 };
746
747 static int __init inet6_init(void)
748 {
749 struct sk_buff *dummy_skb;
750 struct list_head *r;
751 int err;
752
753 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
754
755 #ifdef MODULE
756 #if 0 /* FIXME --RR */
757 if (!mod_member_present(&__this_module, can_unload))
758 return -EINVAL;
759
760 __this_module.can_unload = &ipv6_unload;
761 #endif
762 #endif
763 err = proto_register(&tcpv6_prot, 1);
764 if (err)
765 goto out;
766
767 err = proto_register(&udpv6_prot, 1);
768 if (err)
769 goto out_unregister_tcp_proto;
770
771 err = proto_register(&udplitev6_prot, 1);
772 if (err)
773 goto out_unregister_udp_proto;
774
775 err = proto_register(&rawv6_prot, 1);
776 if (err)
777 goto out_unregister_udplite_proto;
778
779
780 /* Register the socket-side information for inet6_create. */
781 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
782 INIT_LIST_HEAD(r);
783
784 /* We MUST register RAW sockets before we create the ICMP6,
785 * IGMP6, or NDISC control sockets.
786 */
787 err = rawv6_init();
788 if (err)
789 goto out_unregister_raw_proto;
790
791 /* Register the family here so that the init calls below will
792 * be able to create sockets. (?? is this dangerous ??)
793 */
794 err = sock_register(&inet6_family_ops);
795 if (err)
796 goto out_sock_register_fail;
797
798 /* Initialise ipv6 mibs */
799 err = init_ipv6_mibs();
800 if (err)
801 goto out_unregister_sock;
802
803 /*
804 * ipngwg API draft makes clear that the correct semantics
805 * for TCP and UDP is to consider one TCP and UDP instance
806 * in a host availiable by both INET and INET6 APIs and
807 * able to communicate via both network protocols.
808 */
809
810 err = register_pernet_subsys(&inet6_net_ops);
811 if (err)
812 goto register_pernet_fail;
813
814 #ifdef CONFIG_SYSCTL
815 err = ipv6_sysctl_register();
816 if (err)
817 goto sysctl_fail;
818 #endif
819 err = icmpv6_init(&inet6_family_ops);
820 if (err)
821 goto icmp_fail;
822 err = ndisc_init(&inet6_family_ops);
823 if (err)
824 goto ndisc_fail;
825 err = igmp6_init(&inet6_family_ops);
826 if (err)
827 goto igmp_fail;
828 err = ipv6_netfilter_init();
829 if (err)
830 goto netfilter_fail;
831 /* Create /proc/foo6 entries. */
832 #ifdef CONFIG_PROC_FS
833 err = -ENOMEM;
834 if (raw6_proc_init())
835 goto proc_raw6_fail;
836 if (tcp6_proc_init())
837 goto proc_tcp6_fail;
838 if (udp6_proc_init())
839 goto proc_udp6_fail;
840 if (udplite6_proc_init())
841 goto proc_udplite6_fail;
842 if (ipv6_misc_proc_init())
843 goto proc_misc6_fail;
844
845 if (ac6_proc_init())
846 goto proc_anycast6_fail;
847 if (if6_proc_init())
848 goto proc_if6_fail;
849 #endif
850 err = ip6_route_init();
851 if (err)
852 goto ip6_route_fail;
853 err = ip6_flowlabel_init();
854 if (err)
855 goto ip6_flowlabel_fail;
856 err = addrconf_init();
857 if (err)
858 goto addrconf_fail;
859
860 /* Init v6 extension headers. */
861 err = ipv6_exthdrs_init();
862 if (err)
863 goto ipv6_exthdrs_fail;
864
865 err = ipv6_frag_init();
866 if (err)
867 goto ipv6_frag_fail;
868
869 /* Init v6 transport protocols. */
870 err = udpv6_init();
871 if (err)
872 goto udpv6_fail;
873
874 err = udplitev6_init();
875 if (err)
876 goto udplitev6_fail;
877
878 err = tcpv6_init();
879 if (err)
880 goto tcpv6_fail;
881
882 err = ipv6_packet_init();
883 if (err)
884 goto ipv6_packet_fail;
885 out:
886 return err;
887
888 ipv6_packet_fail:
889 tcpv6_exit();
890 tcpv6_fail:
891 udplitev6_exit();
892 udplitev6_fail:
893 udpv6_exit();
894 udpv6_fail:
895 ipv6_frag_exit();
896 ipv6_frag_fail:
897 ipv6_exthdrs_exit();
898 ipv6_exthdrs_fail:
899 addrconf_cleanup();
900 addrconf_fail:
901 ip6_flowlabel_cleanup();
902 ip6_flowlabel_fail:
903 ip6_route_cleanup();
904 ip6_route_fail:
905 #ifdef CONFIG_PROC_FS
906 if6_proc_exit();
907 proc_if6_fail:
908 ac6_proc_exit();
909 proc_anycast6_fail:
910 ipv6_misc_proc_exit();
911 proc_misc6_fail:
912 udplite6_proc_exit();
913 proc_udplite6_fail:
914 udp6_proc_exit();
915 proc_udp6_fail:
916 tcp6_proc_exit();
917 proc_tcp6_fail:
918 raw6_proc_exit();
919 proc_raw6_fail:
920 #endif
921 ipv6_netfilter_fini();
922 netfilter_fail:
923 igmp6_cleanup();
924 igmp_fail:
925 ndisc_cleanup();
926 ndisc_fail:
927 icmpv6_cleanup();
928 icmp_fail:
929 #ifdef CONFIG_SYSCTL
930 ipv6_sysctl_unregister();
931 sysctl_fail:
932 #endif
933 unregister_pernet_subsys(&inet6_net_ops);
934 register_pernet_fail:
935 cleanup_ipv6_mibs();
936 out_unregister_sock:
937 sock_unregister(PF_INET6);
938 rtnl_unregister_all(PF_INET6);
939 out_sock_register_fail:
940 rawv6_exit();
941 out_unregister_raw_proto:
942 proto_unregister(&rawv6_prot);
943 out_unregister_udplite_proto:
944 proto_unregister(&udplitev6_prot);
945 out_unregister_udp_proto:
946 proto_unregister(&udpv6_prot);
947 out_unregister_tcp_proto:
948 proto_unregister(&tcpv6_prot);
949 goto out;
950 }
951 module_init(inet6_init);
952
953 static void __exit inet6_exit(void)
954 {
955 /* First of all disallow new sockets creation. */
956 sock_unregister(PF_INET6);
957 /* Disallow any further netlink messages */
958 rtnl_unregister_all(PF_INET6);
959
960 udpv6_exit();
961 udplitev6_exit();
962 tcpv6_exit();
963
964 /* Cleanup code parts. */
965 ipv6_packet_cleanup();
966 ipv6_frag_exit();
967 ipv6_exthdrs_exit();
968 addrconf_cleanup();
969 ip6_flowlabel_cleanup();
970 ip6_route_cleanup();
971 #ifdef CONFIG_PROC_FS
972
973 /* Cleanup code parts. */
974 if6_proc_exit();
975 ac6_proc_exit();
976 ipv6_misc_proc_exit();
977 udplite6_proc_exit();
978 udp6_proc_exit();
979 tcp6_proc_exit();
980 raw6_proc_exit();
981 #endif
982 ipv6_netfilter_fini();
983 igmp6_cleanup();
984 ndisc_cleanup();
985 icmpv6_cleanup();
986 rawv6_exit();
987 #ifdef CONFIG_SYSCTL
988 ipv6_sysctl_unregister();
989 #endif
990 unregister_pernet_subsys(&inet6_net_ops);
991 cleanup_ipv6_mibs();
992 proto_unregister(&rawv6_prot);
993 proto_unregister(&udplitev6_prot);
994 proto_unregister(&udpv6_prot);
995 proto_unregister(&tcpv6_prot);
996 }
997 module_exit(inet6_exit);
998
999 MODULE_ALIAS_NETPROTO(PF_INET6);
WRT350N Kernel Patches