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a944f1313c5fd6c04d4962c9ed59d4d29bb82db8
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv6 / af_inet6.c
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 * Fixes:
11 * piggy, Karl Knutson : Socket protocol table
12 * Hideaki YOSHIFUJI : sin6_scope_id support
13 * Arnaldo Melo : check proc_net_create return, cleanups
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20
21 #define pr_fmt(fmt) "IPv6: " fmt
22
23 #include <linux/module.h>
24 #include <linux/capability.h>
25 #include <linux/errno.h>
26 #include <linux/types.h>
27 #include <linux/socket.h>
28 #include <linux/in.h>
29 #include <linux/kernel.h>
30 #include <linux/timer.h>
31 #include <linux/string.h>
32 #include <linux/sockios.h>
33 #include <linux/net.h>
34 #include <linux/fcntl.h>
35 #include <linux/mm.h>
36 #include <linux/interrupt.h>
37 #include <linux/proc_fs.h>
38 #include <linux/stat.h>
39 #include <linux/init.h>
40 #include <linux/slab.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/protocol.h>
53 #include <net/inet_common.h>
54 #include <net/route.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 <linux/mroute6.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 struct ipv6_params ipv6_defaults = {
76 .disable_ipv6 = 0,
77 .autoconf = 1,
78 };
79
80 static int disable_ipv6_mod;
81
82 module_param_named(disable, disable_ipv6_mod, int, 0444);
83 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
84
85 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
86 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
87
88 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
89 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
90
91 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
92 {
93 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
94
95 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
96 }
97
98 static int inet6_create(struct net *net, struct socket *sock, int protocol,
99 int kern)
100 {
101 struct inet_sock *inet;
102 struct ipv6_pinfo *np;
103 struct sock *sk;
104 struct inet_protosw *answer;
105 struct proto *answer_prot;
106 unsigned char answer_flags;
107 char answer_no_check;
108 int try_loading_module = 0;
109 int err;
110
111 if (sock->type != SOCK_RAW &&
112 sock->type != SOCK_DGRAM &&
113 !inet_ehash_secret)
114 build_ehash_secret();
115
116 if (protocol < 0 || protocol >= IPPROTO_MAX)
117 return -EINVAL;
118
119 /* Look for the requested type/protocol pair. */
120 lookup_protocol:
121 err = -ESOCKTNOSUPPORT;
122 rcu_read_lock();
123 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
124
125 err = 0;
126 /* Check the non-wild match. */
127 if (protocol == answer->protocol) {
128 if (protocol != IPPROTO_IP)
129 break;
130 } else {
131 /* Check for the two wild cases. */
132 if (IPPROTO_IP == protocol) {
133 protocol = answer->protocol;
134 break;
135 }
136 if (IPPROTO_IP == answer->protocol)
137 break;
138 }
139 err = -EPROTONOSUPPORT;
140 }
141
142 if (err) {
143 if (try_loading_module < 2) {
144 rcu_read_unlock();
145 /*
146 * Be more specific, e.g. net-pf-10-proto-132-type-1
147 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
148 */
149 if (++try_loading_module == 1)
150 request_module("net-pf-%d-proto-%d-type-%d",
151 PF_INET6, protocol, sock->type);
152 /*
153 * Fall back to generic, e.g. net-pf-10-proto-132
154 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
155 */
156 else
157 request_module("net-pf-%d-proto-%d",
158 PF_INET6, protocol);
159 goto lookup_protocol;
160 } else
161 goto out_rcu_unlock;
162 }
163
164 err = -EPERM;
165 if (sock->type == SOCK_RAW && !kern &&
166 !ns_capable(net->user_ns, CAP_NET_RAW))
167 goto out_rcu_unlock;
168
169 sock->ops = answer->ops;
170 answer_prot = answer->prot;
171 answer_no_check = answer->no_check;
172 answer_flags = answer->flags;
173 rcu_read_unlock();
174
175 WARN_ON(answer_prot->slab == NULL);
176
177 err = -ENOBUFS;
178 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
179 if (sk == NULL)
180 goto out;
181
182 sock_init_data(sock, sk);
183
184 err = 0;
185 sk->sk_no_check = answer_no_check;
186 if (INET_PROTOSW_REUSE & answer_flags)
187 sk->sk_reuse = SK_CAN_REUSE;
188
189 inet = inet_sk(sk);
190 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
191
192 if (SOCK_RAW == sock->type) {
193 inet->inet_num = protocol;
194 if (IPPROTO_RAW == protocol)
195 inet->hdrincl = 1;
196 }
197
198 sk->sk_destruct = inet_sock_destruct;
199 sk->sk_family = PF_INET6;
200 sk->sk_protocol = protocol;
201
202 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
203
204 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
205 np->hop_limit = -1;
206 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
207 np->mc_loop = 1;
208 np->pmtudisc = IPV6_PMTUDISC_WANT;
209 np->ipv6only = net->ipv6.sysctl.bindv6only;
210
211 /* Init the ipv4 part of the socket since we can have sockets
212 * using v6 API for ipv4.
213 */
214 inet->uc_ttl = -1;
215
216 inet->mc_loop = 1;
217 inet->mc_ttl = 1;
218 inet->mc_index = 0;
219 inet->mc_list = NULL;
220 inet->rcv_tos = 0;
221
222 if (ipv4_config.no_pmtu_disc)
223 inet->pmtudisc = IP_PMTUDISC_DONT;
224 else
225 inet->pmtudisc = IP_PMTUDISC_WANT;
226 /*
227 * Increment only the relevant sk_prot->socks debug field, this changes
228 * the previous behaviour of incrementing both the equivalent to
229 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
230 *
231 * This allows better debug granularity as we'll know exactly how many
232 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
233 * transport protocol socks. -acme
234 */
235 sk_refcnt_debug_inc(sk);
236
237 if (inet->inet_num) {
238 /* It assumes that any protocol which allows
239 * the user to assign a number at socket
240 * creation time automatically shares.
241 */
242 inet->inet_sport = htons(inet->inet_num);
243 sk->sk_prot->hash(sk);
244 }
245 if (sk->sk_prot->init) {
246 err = sk->sk_prot->init(sk);
247 if (err) {
248 sk_common_release(sk);
249 goto out;
250 }
251 }
252 out:
253 return err;
254 out_rcu_unlock:
255 rcu_read_unlock();
256 goto out;
257 }
258
259
260 /* bind for INET6 API */
261 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
262 {
263 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
264 struct sock *sk = sock->sk;
265 struct inet_sock *inet = inet_sk(sk);
266 struct ipv6_pinfo *np = inet6_sk(sk);
267 struct net *net = sock_net(sk);
268 __be32 v4addr = 0;
269 unsigned short snum;
270 int addr_type = 0;
271 int err = 0;
272
273 /* If the socket has its own bind function then use it. */
274 if (sk->sk_prot->bind)
275 return sk->sk_prot->bind(sk, uaddr, addr_len);
276
277 if (addr_len < SIN6_LEN_RFC2133)
278 return -EINVAL;
279
280 if (addr->sin6_family != AF_INET6)
281 return -EAFNOSUPPORT;
282
283 addr_type = ipv6_addr_type(&addr->sin6_addr);
284 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
285 return -EINVAL;
286
287 snum = ntohs(addr->sin6_port);
288 if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
289 return -EACCES;
290
291 lock_sock(sk);
292
293 /* Check these errors (active socket, double bind). */
294 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
295 err = -EINVAL;
296 goto out;
297 }
298
299 /* Check if the address belongs to the host. */
300 if (addr_type == IPV6_ADDR_MAPPED) {
301 int chk_addr_ret;
302
303 /* Binding to v4-mapped address on a v6-only socket
304 * makes no sense
305 */
306 if (np->ipv6only) {
307 err = -EINVAL;
308 goto out;
309 }
310
311 /* Reproduce AF_INET checks to make the bindings consistent */
312 v4addr = addr->sin6_addr.s6_addr32[3];
313 chk_addr_ret = inet_addr_type(net, v4addr);
314 if (!sysctl_ip_nonlocal_bind &&
315 !(inet->freebind || inet->transparent) &&
316 v4addr != htonl(INADDR_ANY) &&
317 chk_addr_ret != RTN_LOCAL &&
318 chk_addr_ret != RTN_MULTICAST &&
319 chk_addr_ret != RTN_BROADCAST) {
320 err = -EADDRNOTAVAIL;
321 goto out;
322 }
323 } else {
324 if (addr_type != IPV6_ADDR_ANY) {
325 struct net_device *dev = NULL;
326
327 rcu_read_lock();
328 if (__ipv6_addr_needs_scope_id(addr_type)) {
329 if (addr_len >= sizeof(struct sockaddr_in6) &&
330 addr->sin6_scope_id) {
331 /* Override any existing binding, if another one
332 * is supplied by user.
333 */
334 sk->sk_bound_dev_if = addr->sin6_scope_id;
335 }
336
337 /* Binding to link-local address requires an interface */
338 if (!sk->sk_bound_dev_if) {
339 err = -EINVAL;
340 goto out_unlock;
341 }
342 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
343 if (!dev) {
344 err = -ENODEV;
345 goto out_unlock;
346 }
347 }
348
349 /* ipv4 addr of the socket is invalid. Only the
350 * unspecified and mapped address have a v4 equivalent.
351 */
352 v4addr = LOOPBACK4_IPV6;
353 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
354 if (!(inet->freebind || inet->transparent) &&
355 !ipv6_chk_addr(net, &addr->sin6_addr,
356 dev, 0)) {
357 err = -EADDRNOTAVAIL;
358 goto out_unlock;
359 }
360 }
361 rcu_read_unlock();
362 }
363 }
364
365 inet->inet_rcv_saddr = v4addr;
366 inet->inet_saddr = v4addr;
367
368 np->rcv_saddr = addr->sin6_addr;
369
370 if (!(addr_type & IPV6_ADDR_MULTICAST))
371 np->saddr = addr->sin6_addr;
372
373 /* Make sure we are allowed to bind here. */
374 if (sk->sk_prot->get_port(sk, snum)) {
375 inet_reset_saddr(sk);
376 err = -EADDRINUSE;
377 goto out;
378 }
379
380 if (addr_type != IPV6_ADDR_ANY) {
381 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
382 if (addr_type != IPV6_ADDR_MAPPED)
383 np->ipv6only = 1;
384 }
385 if (snum)
386 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
387 inet->inet_sport = htons(inet->inet_num);
388 inet->inet_dport = 0;
389 inet->inet_daddr = 0;
390 out:
391 release_sock(sk);
392 return err;
393 out_unlock:
394 rcu_read_unlock();
395 goto out;
396 }
397 EXPORT_SYMBOL(inet6_bind);
398
399 int inet6_release(struct socket *sock)
400 {
401 struct sock *sk = sock->sk;
402
403 if (sk == NULL)
404 return -EINVAL;
405
406 /* Free mc lists */
407 ipv6_sock_mc_close(sk);
408
409 /* Free ac lists */
410 ipv6_sock_ac_close(sk);
411
412 return inet_release(sock);
413 }
414 EXPORT_SYMBOL(inet6_release);
415
416 void inet6_destroy_sock(struct sock *sk)
417 {
418 struct ipv6_pinfo *np = inet6_sk(sk);
419 struct sk_buff *skb;
420 struct ipv6_txoptions *opt;
421
422 /* Release rx options */
423
424 skb = xchg(&np->pktoptions, NULL);
425 if (skb != NULL)
426 kfree_skb(skb);
427
428 skb = xchg(&np->rxpmtu, NULL);
429 if (skb != NULL)
430 kfree_skb(skb);
431
432 /* Free flowlabels */
433 fl6_free_socklist(sk);
434
435 /* Free tx options */
436
437 opt = xchg(&np->opt, NULL);
438 if (opt != NULL)
439 sock_kfree_s(sk, opt, opt->tot_len);
440 }
441 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
442
443 /*
444 * This does both peername and sockname.
445 */
446
447 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
448 int *uaddr_len, int peer)
449 {
450 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
451 struct sock *sk = sock->sk;
452 struct inet_sock *inet = inet_sk(sk);
453 struct ipv6_pinfo *np = inet6_sk(sk);
454
455 sin->sin6_family = AF_INET6;
456 sin->sin6_flowinfo = 0;
457 sin->sin6_scope_id = 0;
458 if (peer) {
459 if (!inet->inet_dport)
460 return -ENOTCONN;
461 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
462 peer == 1)
463 return -ENOTCONN;
464 sin->sin6_port = inet->inet_dport;
465 sin->sin6_addr = np->daddr;
466 if (np->sndflow)
467 sin->sin6_flowinfo = np->flow_label;
468 } else {
469 if (ipv6_addr_any(&np->rcv_saddr))
470 sin->sin6_addr = np->saddr;
471 else
472 sin->sin6_addr = np->rcv_saddr;
473
474 sin->sin6_port = inet->inet_sport;
475 }
476 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
477 sk->sk_bound_dev_if);
478 *uaddr_len = sizeof(*sin);
479 return 0;
480 }
481 EXPORT_SYMBOL(inet6_getname);
482
483 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
484 {
485 struct sock *sk = sock->sk;
486 struct net *net = sock_net(sk);
487
488 switch (cmd) {
489 case SIOCGSTAMP:
490 return sock_get_timestamp(sk, (struct timeval __user *)arg);
491
492 case SIOCGSTAMPNS:
493 return sock_get_timestampns(sk, (struct timespec __user *)arg);
494
495 case SIOCADDRT:
496 case SIOCDELRT:
497
498 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
499
500 case SIOCSIFADDR:
501 return addrconf_add_ifaddr(net, (void __user *) arg);
502 case SIOCDIFADDR:
503 return addrconf_del_ifaddr(net, (void __user *) arg);
504 case SIOCSIFDSTADDR:
505 return addrconf_set_dstaddr(net, (void __user *) arg);
506 default:
507 if (!sk->sk_prot->ioctl)
508 return -ENOIOCTLCMD;
509 return sk->sk_prot->ioctl(sk, cmd, arg);
510 }
511 /*NOTREACHED*/
512 return 0;
513 }
514 EXPORT_SYMBOL(inet6_ioctl);
515
516 const struct proto_ops inet6_stream_ops = {
517 .family = PF_INET6,
518 .owner = THIS_MODULE,
519 .release = inet6_release,
520 .bind = inet6_bind,
521 .connect = inet_stream_connect, /* ok */
522 .socketpair = sock_no_socketpair, /* a do nothing */
523 .accept = inet_accept, /* ok */
524 .getname = inet6_getname,
525 .poll = tcp_poll, /* ok */
526 .ioctl = inet6_ioctl, /* must change */
527 .listen = inet_listen, /* ok */
528 .shutdown = inet_shutdown, /* ok */
529 .setsockopt = sock_common_setsockopt, /* ok */
530 .getsockopt = sock_common_getsockopt, /* ok */
531 .sendmsg = inet_sendmsg, /* ok */
532 .recvmsg = inet_recvmsg, /* ok */
533 .mmap = sock_no_mmap,
534 .sendpage = inet_sendpage,
535 .splice_read = tcp_splice_read,
536 #ifdef CONFIG_COMPAT
537 .compat_setsockopt = compat_sock_common_setsockopt,
538 .compat_getsockopt = compat_sock_common_getsockopt,
539 #endif
540 };
541
542 const struct proto_ops inet6_dgram_ops = {
543 .family = PF_INET6,
544 .owner = THIS_MODULE,
545 .release = inet6_release,
546 .bind = inet6_bind,
547 .connect = inet_dgram_connect, /* ok */
548 .socketpair = sock_no_socketpair, /* a do nothing */
549 .accept = sock_no_accept, /* a do nothing */
550 .getname = inet6_getname,
551 .poll = udp_poll, /* ok */
552 .ioctl = inet6_ioctl, /* must change */
553 .listen = sock_no_listen, /* ok */
554 .shutdown = inet_shutdown, /* ok */
555 .setsockopt = sock_common_setsockopt, /* ok */
556 .getsockopt = sock_common_getsockopt, /* ok */
557 .sendmsg = inet_sendmsg, /* ok */
558 .recvmsg = inet_recvmsg, /* ok */
559 .mmap = sock_no_mmap,
560 .sendpage = sock_no_sendpage,
561 #ifdef CONFIG_COMPAT
562 .compat_setsockopt = compat_sock_common_setsockopt,
563 .compat_getsockopt = compat_sock_common_getsockopt,
564 #endif
565 };
566
567 static const struct net_proto_family inet6_family_ops = {
568 .family = PF_INET6,
569 .create = inet6_create,
570 .owner = THIS_MODULE,
571 };
572
573 int inet6_register_protosw(struct inet_protosw *p)
574 {
575 struct list_head *lh;
576 struct inet_protosw *answer;
577 struct list_head *last_perm;
578 int protocol = p->protocol;
579 int ret;
580
581 spin_lock_bh(&inetsw6_lock);
582
583 ret = -EINVAL;
584 if (p->type >= SOCK_MAX)
585 goto out_illegal;
586
587 /* If we are trying to override a permanent protocol, bail. */
588 answer = NULL;
589 ret = -EPERM;
590 last_perm = &inetsw6[p->type];
591 list_for_each(lh, &inetsw6[p->type]) {
592 answer = list_entry(lh, struct inet_protosw, list);
593
594 /* Check only the non-wild match. */
595 if (INET_PROTOSW_PERMANENT & answer->flags) {
596 if (protocol == answer->protocol)
597 break;
598 last_perm = lh;
599 }
600
601 answer = NULL;
602 }
603 if (answer)
604 goto out_permanent;
605
606 /* Add the new entry after the last permanent entry if any, so that
607 * the new entry does not override a permanent entry when matched with
608 * a wild-card protocol. But it is allowed to override any existing
609 * non-permanent entry. This means that when we remove this entry, the
610 * system automatically returns to the old behavior.
611 */
612 list_add_rcu(&p->list, last_perm);
613 ret = 0;
614 out:
615 spin_unlock_bh(&inetsw6_lock);
616 return ret;
617
618 out_permanent:
619 pr_err("Attempt to override permanent protocol %d\n", protocol);
620 goto out;
621
622 out_illegal:
623 pr_err("Ignoring attempt to register invalid socket type %d\n",
624 p->type);
625 goto out;
626 }
627 EXPORT_SYMBOL(inet6_register_protosw);
628
629 void
630 inet6_unregister_protosw(struct inet_protosw *p)
631 {
632 if (INET_PROTOSW_PERMANENT & p->flags) {
633 pr_err("Attempt to unregister permanent protocol %d\n",
634 p->protocol);
635 } else {
636 spin_lock_bh(&inetsw6_lock);
637 list_del_rcu(&p->list);
638 spin_unlock_bh(&inetsw6_lock);
639
640 synchronize_net();
641 }
642 }
643 EXPORT_SYMBOL(inet6_unregister_protosw);
644
645 int inet6_sk_rebuild_header(struct sock *sk)
646 {
647 struct ipv6_pinfo *np = inet6_sk(sk);
648 struct dst_entry *dst;
649
650 dst = __sk_dst_check(sk, np->dst_cookie);
651
652 if (dst == NULL) {
653 struct inet_sock *inet = inet_sk(sk);
654 struct in6_addr *final_p, final;
655 struct flowi6 fl6;
656
657 memset(&fl6, 0, sizeof(fl6));
658 fl6.flowi6_proto = sk->sk_protocol;
659 fl6.daddr = np->daddr;
660 fl6.saddr = np->saddr;
661 fl6.flowlabel = np->flow_label;
662 fl6.flowi6_oif = sk->sk_bound_dev_if;
663 fl6.flowi6_mark = sk->sk_mark;
664 fl6.fl6_dport = inet->inet_dport;
665 fl6.fl6_sport = inet->inet_sport;
666 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
667
668 final_p = fl6_update_dst(&fl6, np->opt, &final);
669
670 dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
671 if (IS_ERR(dst)) {
672 sk->sk_route_caps = 0;
673 sk->sk_err_soft = -PTR_ERR(dst);
674 return PTR_ERR(dst);
675 }
676
677 __ip6_dst_store(sk, dst, NULL, NULL);
678 }
679
680 return 0;
681 }
682 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
683
684 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb)
685 {
686 const struct ipv6_pinfo *np = inet6_sk(sk);
687 const struct inet6_skb_parm *opt = IP6CB(skb);
688
689 if (np->rxopt.all) {
690 if ((opt->hop && (np->rxopt.bits.hopopts ||
691 np->rxopt.bits.ohopopts)) ||
692 ((IPV6_FLOWINFO_MASK &
693 *(__be32 *)skb_network_header(skb)) &&
694 np->rxopt.bits.rxflow) ||
695 (opt->srcrt && (np->rxopt.bits.srcrt ||
696 np->rxopt.bits.osrcrt)) ||
697 ((opt->dst1 || opt->dst0) &&
698 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
699 return true;
700 }
701 return false;
702 }
703 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
704
705 static struct packet_type ipv6_packet_type __read_mostly = {
706 .type = cpu_to_be16(ETH_P_IPV6),
707 .func = ipv6_rcv,
708 };
709
710 static int __init ipv6_packet_init(void)
711 {
712 dev_add_pack(&ipv6_packet_type);
713 return 0;
714 }
715
716 static void ipv6_packet_cleanup(void)
717 {
718 dev_remove_pack(&ipv6_packet_type);
719 }
720
721 static int __net_init ipv6_init_mibs(struct net *net)
722 {
723 if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6,
724 sizeof(struct udp_mib),
725 __alignof__(struct udp_mib)) < 0)
726 return -ENOMEM;
727 if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6,
728 sizeof(struct udp_mib),
729 __alignof__(struct udp_mib)) < 0)
730 goto err_udplite_mib;
731 if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics,
732 sizeof(struct ipstats_mib),
733 __alignof__(struct ipstats_mib)) < 0)
734 goto err_ip_mib;
735 if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics,
736 sizeof(struct icmpv6_mib),
737 __alignof__(struct icmpv6_mib)) < 0)
738 goto err_icmp_mib;
739 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
740 GFP_KERNEL);
741 if (!net->mib.icmpv6msg_statistics)
742 goto err_icmpmsg_mib;
743 return 0;
744
745 err_icmpmsg_mib:
746 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
747 err_icmp_mib:
748 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
749 err_ip_mib:
750 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
751 err_udplite_mib:
752 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
753 return -ENOMEM;
754 }
755
756 static void ipv6_cleanup_mibs(struct net *net)
757 {
758 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
759 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
760 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
761 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
762 kfree(net->mib.icmpv6msg_statistics);
763 }
764
765 static int __net_init inet6_net_init(struct net *net)
766 {
767 int err = 0;
768
769 net->ipv6.sysctl.bindv6only = 0;
770 net->ipv6.sysctl.icmpv6_time = 1*HZ;
771
772 err = ipv6_init_mibs(net);
773 if (err)
774 return err;
775 #ifdef CONFIG_PROC_FS
776 err = udp6_proc_init(net);
777 if (err)
778 goto out;
779 err = tcp6_proc_init(net);
780 if (err)
781 goto proc_tcp6_fail;
782 err = ac6_proc_init(net);
783 if (err)
784 goto proc_ac6_fail;
785 #endif
786 return err;
787
788 #ifdef CONFIG_PROC_FS
789 proc_ac6_fail:
790 tcp6_proc_exit(net);
791 proc_tcp6_fail:
792 udp6_proc_exit(net);
793 out:
794 ipv6_cleanup_mibs(net);
795 return err;
796 #endif
797 }
798
799 static void __net_exit inet6_net_exit(struct net *net)
800 {
801 #ifdef CONFIG_PROC_FS
802 udp6_proc_exit(net);
803 tcp6_proc_exit(net);
804 ac6_proc_exit(net);
805 #endif
806 ipv6_cleanup_mibs(net);
807 }
808
809 static struct pernet_operations inet6_net_ops = {
810 .init = inet6_net_init,
811 .exit = inet6_net_exit,
812 };
813
814 static int __init inet6_init(void)
815 {
816 struct list_head *r;
817 int err = 0;
818
819 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb));
820
821 /* Register the socket-side information for inet6_create. */
822 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
823 INIT_LIST_HEAD(r);
824
825 if (disable_ipv6_mod) {
826 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
827 goto out;
828 }
829
830 err = proto_register(&tcpv6_prot, 1);
831 if (err)
832 goto out;
833
834 err = proto_register(&udpv6_prot, 1);
835 if (err)
836 goto out_unregister_tcp_proto;
837
838 err = proto_register(&udplitev6_prot, 1);
839 if (err)
840 goto out_unregister_udp_proto;
841
842 err = proto_register(&rawv6_prot, 1);
843 if (err)
844 goto out_unregister_udplite_proto;
845
846
847 /* We MUST register RAW sockets before we create the ICMP6,
848 * IGMP6, or NDISC control sockets.
849 */
850 err = rawv6_init();
851 if (err)
852 goto out_unregister_raw_proto;
853
854 /* Register the family here so that the init calls below will
855 * be able to create sockets. (?? is this dangerous ??)
856 */
857 err = sock_register(&inet6_family_ops);
858 if (err)
859 goto out_sock_register_fail;
860
861 tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem;
862
863 /*
864 * ipngwg API draft makes clear that the correct semantics
865 * for TCP and UDP is to consider one TCP and UDP instance
866 * in a host available by both INET and INET6 APIs and
867 * able to communicate via both network protocols.
868 */
869
870 err = register_pernet_subsys(&inet6_net_ops);
871 if (err)
872 goto register_pernet_fail;
873 err = icmpv6_init();
874 if (err)
875 goto icmp_fail;
876 err = ip6_mr_init();
877 if (err)
878 goto ipmr_fail;
879 err = ndisc_init();
880 if (err)
881 goto ndisc_fail;
882 err = igmp6_init();
883 if (err)
884 goto igmp_fail;
885 err = ipv6_netfilter_init();
886 if (err)
887 goto netfilter_fail;
888 /* Create /proc/foo6 entries. */
889 #ifdef CONFIG_PROC_FS
890 err = -ENOMEM;
891 if (raw6_proc_init())
892 goto proc_raw6_fail;
893 if (udplite6_proc_init())
894 goto proc_udplite6_fail;
895 if (ipv6_misc_proc_init())
896 goto proc_misc6_fail;
897 if (if6_proc_init())
898 goto proc_if6_fail;
899 #endif
900 err = ip6_route_init();
901 if (err)
902 goto ip6_route_fail;
903 err = ip6_flowlabel_init();
904 if (err)
905 goto ip6_flowlabel_fail;
906 err = addrconf_init();
907 if (err)
908 goto addrconf_fail;
909
910 /* Init v6 extension headers. */
911 err = ipv6_exthdrs_init();
912 if (err)
913 goto ipv6_exthdrs_fail;
914
915 err = ipv6_frag_init();
916 if (err)
917 goto ipv6_frag_fail;
918
919 /* Init v6 transport protocols. */
920 err = udpv6_init();
921 if (err)
922 goto udpv6_fail;
923
924 err = udplitev6_init();
925 if (err)
926 goto udplitev6_fail;
927
928 err = tcpv6_init();
929 if (err)
930 goto tcpv6_fail;
931
932 err = ipv6_packet_init();
933 if (err)
934 goto ipv6_packet_fail;
935
936 #ifdef CONFIG_SYSCTL
937 err = ipv6_sysctl_register();
938 if (err)
939 goto sysctl_fail;
940 #endif
941 out:
942 return err;
943
944 #ifdef CONFIG_SYSCTL
945 sysctl_fail:
946 ipv6_packet_cleanup();
947 #endif
948 ipv6_packet_fail:
949 tcpv6_exit();
950 tcpv6_fail:
951 udplitev6_exit();
952 udplitev6_fail:
953 udpv6_exit();
954 udpv6_fail:
955 ipv6_frag_exit();
956 ipv6_frag_fail:
957 ipv6_exthdrs_exit();
958 ipv6_exthdrs_fail:
959 addrconf_cleanup();
960 addrconf_fail:
961 ip6_flowlabel_cleanup();
962 ip6_flowlabel_fail:
963 ip6_route_cleanup();
964 ip6_route_fail:
965 #ifdef CONFIG_PROC_FS
966 if6_proc_exit();
967 proc_if6_fail:
968 ipv6_misc_proc_exit();
969 proc_misc6_fail:
970 udplite6_proc_exit();
971 proc_udplite6_fail:
972 raw6_proc_exit();
973 proc_raw6_fail:
974 #endif
975 ipv6_netfilter_fini();
976 netfilter_fail:
977 igmp6_cleanup();
978 igmp_fail:
979 ndisc_cleanup();
980 ndisc_fail:
981 ip6_mr_cleanup();
982 ipmr_fail:
983 icmpv6_cleanup();
984 icmp_fail:
985 unregister_pernet_subsys(&inet6_net_ops);
986 register_pernet_fail:
987 sock_unregister(PF_INET6);
988 rtnl_unregister_all(PF_INET6);
989 out_sock_register_fail:
990 rawv6_exit();
991 out_unregister_raw_proto:
992 proto_unregister(&rawv6_prot);
993 out_unregister_udplite_proto:
994 proto_unregister(&udplitev6_prot);
995 out_unregister_udp_proto:
996 proto_unregister(&udpv6_prot);
997 out_unregister_tcp_proto:
998 proto_unregister(&tcpv6_prot);
999 goto out;
1000 }
1001 module_init(inet6_init);
1002
1003 static void __exit inet6_exit(void)
1004 {
1005 if (disable_ipv6_mod)
1006 return;
1007
1008 /* First of all disallow new sockets creation. */
1009 sock_unregister(PF_INET6);
1010 /* Disallow any further netlink messages */
1011 rtnl_unregister_all(PF_INET6);
1012
1013 udpv6_exit();
1014 udplitev6_exit();
1015 tcpv6_exit();
1016
1017 /* Cleanup code parts. */
1018 ipv6_packet_cleanup();
1019 ipv6_frag_exit();
1020 ipv6_exthdrs_exit();
1021 addrconf_cleanup();
1022 ip6_flowlabel_cleanup();
1023 ip6_route_cleanup();
1024 #ifdef CONFIG_PROC_FS
1025
1026 /* Cleanup code parts. */
1027 if6_proc_exit();
1028 ipv6_misc_proc_exit();
1029 udplite6_proc_exit();
1030 raw6_proc_exit();
1031 #endif
1032 ipv6_netfilter_fini();
1033 igmp6_cleanup();
1034 ndisc_cleanup();
1035 ip6_mr_cleanup();
1036 icmpv6_cleanup();
1037 rawv6_exit();
1038
1039 unregister_pernet_subsys(&inet6_net_ops);
1040 proto_unregister(&rawv6_prot);
1041 proto_unregister(&udplitev6_prot);
1042 proto_unregister(&udpv6_prot);
1043 proto_unregister(&tcpv6_prot);
1044
1045 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1046 }
1047 module_exit(inet6_exit);
1048
1049 MODULE_ALIAS_NETPROTO(PF_INET6);
kernel source for telekom puls (alcatel/mediatek)