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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * PF_INET6 socket protocol family | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * |
8 | * Adapted from linux/net/ipv4/af_inet.c | |
9 | * | |
1da177e4 LT |
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 | ||
22 | #include <linux/module.h> | |
4fc268d2 | 23 | #include <linux/capability.h> |
1da177e4 LT |
24 | #include <linux/errno.h> |
25 | #include <linux/types.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/in.h> | |
28 | #include <linux/kernel.h> | |
1da177e4 LT |
29 | #include <linux/timer.h> |
30 | #include <linux/string.h> | |
31 | #include <linux/sockios.h> | |
32 | #include <linux/net.h> | |
33 | #include <linux/fcntl.h> | |
34 | #include <linux/mm.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/proc_fs.h> | |
37 | #include <linux/stat.h> | |
38 | #include <linux/init.h> | |
39 | ||
40 | #include <linux/inet.h> | |
41 | #include <linux/netdevice.h> | |
42 | #include <linux/icmpv6.h> | |
2cc7d573 | 43 | #include <linux/netfilter_ipv6.h> |
1da177e4 LT |
44 | |
45 | #include <net/ip.h> | |
46 | #include <net/ipv6.h> | |
47 | #include <net/udp.h> | |
ba4e58ec | 48 | #include <net/udplite.h> |
1da177e4 LT |
49 | #include <net/tcp.h> |
50 | #include <net/ipip.h> | |
51 | #include <net/protocol.h> | |
52 | #include <net/inet_common.h> | |
1668e010 | 53 | #include <net/route.h> |
1da177e4 LT |
54 | #include <net/transp_v6.h> |
55 | #include <net/ip6_route.h> | |
56 | #include <net/addrconf.h> | |
57 | #ifdef CONFIG_IPV6_TUNNEL | |
58 | #include <net/ip6_tunnel.h> | |
59 | #endif | |
60 | ||
61 | #include <asm/uaccess.h> | |
62 | #include <asm/system.h> | |
7bc570c8 | 63 | #include <linux/mroute6.h> |
1da177e4 LT |
64 | |
65 | MODULE_AUTHOR("Cast of dozens"); | |
66 | MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); | |
67 | MODULE_LICENSE("GPL"); | |
68 | ||
f1267347 | 69 | /* The inetsw6 table contains everything that inet6_create needs to |
1da177e4 LT |
70 | * build a new socket. |
71 | */ | |
72 | static struct list_head inetsw6[SOCK_MAX]; | |
73 | static DEFINE_SPINLOCK(inetsw6_lock); | |
74 | ||
fe7ca2e1 BH |
75 | static int disable_ipv6 = 0; |
76 | module_param_named(disable, disable_ipv6, int, 0); | |
77 | MODULE_PARM_DESC(disable, "Disable IPv6 such that it is non-functional"); | |
78 | ||
1da177e4 LT |
79 | static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) |
80 | { | |
81 | const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); | |
82 | ||
83 | return (struct ipv6_pinfo *)(((u8 *)sk) + offset); | |
84 | } | |
85 | ||
1b8d7ae4 | 86 | static int inet6_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
87 | { |
88 | struct inet_sock *inet; | |
89 | struct ipv6_pinfo *np; | |
90 | struct sock *sk; | |
1da177e4 LT |
91 | struct inet_protosw *answer; |
92 | struct proto *answer_prot; | |
93 | unsigned char answer_flags; | |
94 | char answer_no_check; | |
af1afe86 YH |
95 | int try_loading_module = 0; |
96 | int err; | |
1da177e4 | 97 | |
b3da2cf3 DM |
98 | if (sock->type != SOCK_RAW && |
99 | sock->type != SOCK_DGRAM && | |
100 | !inet_ehash_secret) | |
101 | build_ehash_secret(); | |
102 | ||
1da177e4 | 103 | /* Look for the requested type/protocol pair. */ |
af1afe86 YH |
104 | lookup_protocol: |
105 | err = -ESOCKTNOSUPPORT; | |
1da177e4 | 106 | rcu_read_lock(); |
696adfe8 | 107 | list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { |
1da177e4 | 108 | |
696adfe8 | 109 | err = 0; |
1da177e4 LT |
110 | /* Check the non-wild match. */ |
111 | if (protocol == answer->protocol) { | |
112 | if (protocol != IPPROTO_IP) | |
113 | break; | |
114 | } else { | |
115 | /* Check for the two wild cases. */ | |
116 | if (IPPROTO_IP == protocol) { | |
117 | protocol = answer->protocol; | |
118 | break; | |
119 | } | |
120 | if (IPPROTO_IP == answer->protocol) | |
121 | break; | |
122 | } | |
af1afe86 | 123 | err = -EPROTONOSUPPORT; |
1da177e4 LT |
124 | } |
125 | ||
696adfe8 | 126 | if (err) { |
af1afe86 YH |
127 | if (try_loading_module < 2) { |
128 | rcu_read_unlock(); | |
129 | /* | |
130 | * Be more specific, e.g. net-pf-10-proto-132-type-1 | |
131 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) | |
132 | */ | |
133 | if (++try_loading_module == 1) | |
134 | request_module("net-pf-%d-proto-%d-type-%d", | |
135 | PF_INET6, protocol, sock->type); | |
136 | /* | |
137 | * Fall back to generic, e.g. net-pf-10-proto-132 | |
138 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP) | |
139 | */ | |
140 | else | |
141 | request_module("net-pf-%d-proto-%d", | |
142 | PF_INET6, protocol); | |
143 | goto lookup_protocol; | |
144 | } else | |
145 | goto out_rcu_unlock; | |
146 | } | |
147 | ||
148 | err = -EPERM; | |
1da177e4 LT |
149 | if (answer->capability > 0 && !capable(answer->capability)) |
150 | goto out_rcu_unlock; | |
1da177e4 LT |
151 | |
152 | sock->ops = answer->ops; | |
1da177e4 LT |
153 | answer_prot = answer->prot; |
154 | answer_no_check = answer->no_check; | |
155 | answer_flags = answer->flags; | |
156 | rcu_read_unlock(); | |
157 | ||
547b792c | 158 | WARN_ON(answer_prot->slab == NULL); |
1da177e4 | 159 | |
af1afe86 | 160 | err = -ENOBUFS; |
6257ff21 | 161 | sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot); |
1da177e4 LT |
162 | if (sk == NULL) |
163 | goto out; | |
164 | ||
165 | sock_init_data(sock, sk); | |
166 | ||
af1afe86 | 167 | err = 0; |
1da177e4 LT |
168 | sk->sk_no_check = answer_no_check; |
169 | if (INET_PROTOSW_REUSE & answer_flags) | |
170 | sk->sk_reuse = 1; | |
171 | ||
172 | inet = inet_sk(sk); | |
469de9b9 | 173 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
1da177e4 LT |
174 | |
175 | if (SOCK_RAW == sock->type) { | |
176 | inet->num = protocol; | |
177 | if (IPPROTO_RAW == protocol) | |
178 | inet->hdrincl = 1; | |
179 | } | |
180 | ||
e6848976 | 181 | sk->sk_destruct = inet_sock_destruct; |
1da177e4 LT |
182 | sk->sk_family = PF_INET6; |
183 | sk->sk_protocol = protocol; | |
184 | ||
185 | sk->sk_backlog_rcv = answer->prot->backlog_rcv; | |
186 | ||
187 | inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); | |
188 | np->hop_limit = -1; | |
189 | np->mcast_hops = -1; | |
190 | np->mc_loop = 1; | |
191 | np->pmtudisc = IPV6_PMTUDISC_WANT; | |
2e761e05 | 192 | np->ipv6only = net->ipv6.sysctl.bindv6only; |
1ab1457c | 193 | |
1da177e4 LT |
194 | /* Init the ipv4 part of the socket since we can have sockets |
195 | * using v6 API for ipv4. | |
196 | */ | |
197 | inet->uc_ttl = -1; | |
198 | ||
199 | inet->mc_loop = 1; | |
200 | inet->mc_ttl = 1; | |
201 | inet->mc_index = 0; | |
202 | inet->mc_list = NULL; | |
203 | ||
204 | if (ipv4_config.no_pmtu_disc) | |
205 | inet->pmtudisc = IP_PMTUDISC_DONT; | |
206 | else | |
207 | inet->pmtudisc = IP_PMTUDISC_WANT; | |
1ab1457c | 208 | /* |
e6848976 ACM |
209 | * Increment only the relevant sk_prot->socks debug field, this changes |
210 | * the previous behaviour of incrementing both the equivalent to | |
211 | * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. | |
212 | * | |
213 | * This allows better debug granularity as we'll know exactly how many | |
214 | * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 | |
215 | * transport protocol socks. -acme | |
216 | */ | |
217 | sk_refcnt_debug_inc(sk); | |
1da177e4 | 218 | |
1da177e4 LT |
219 | if (inet->num) { |
220 | /* It assumes that any protocol which allows | |
221 | * the user to assign a number at socket | |
222 | * creation time automatically shares. | |
223 | */ | |
e69a4adc | 224 | inet->sport = htons(inet->num); |
1da177e4 LT |
225 | sk->sk_prot->hash(sk); |
226 | } | |
227 | if (sk->sk_prot->init) { | |
af1afe86 YH |
228 | err = sk->sk_prot->init(sk); |
229 | if (err) { | |
1da177e4 LT |
230 | sk_common_release(sk); |
231 | goto out; | |
232 | } | |
233 | } | |
234 | out: | |
af1afe86 | 235 | return err; |
1da177e4 LT |
236 | out_rcu_unlock: |
237 | rcu_read_unlock(); | |
238 | goto out; | |
239 | } | |
240 | ||
241 | ||
242 | /* bind for INET6 API */ | |
243 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
244 | { | |
245 | struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr; | |
246 | struct sock *sk = sock->sk; | |
247 | struct inet_sock *inet = inet_sk(sk); | |
248 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 249 | struct net *net = sock_net(sk); |
fd683222 | 250 | __be32 v4addr = 0; |
1da177e4 LT |
251 | unsigned short snum; |
252 | int addr_type = 0; | |
253 | int err = 0; | |
254 | ||
255 | /* If the socket has its own bind function then use it. */ | |
256 | if (sk->sk_prot->bind) | |
257 | return sk->sk_prot->bind(sk, uaddr, addr_len); | |
258 | ||
259 | if (addr_len < SIN6_LEN_RFC2133) | |
260 | return -EINVAL; | |
261 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
262 | if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) | |
263 | return -EINVAL; | |
264 | ||
265 | snum = ntohs(addr->sin6_port); | |
266 | if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
267 | return -EACCES; | |
268 | ||
269 | lock_sock(sk); | |
270 | ||
271 | /* Check these errors (active socket, double bind). */ | |
272 | if (sk->sk_state != TCP_CLOSE || inet->num) { | |
273 | err = -EINVAL; | |
274 | goto out; | |
275 | } | |
276 | ||
277 | /* Check if the address belongs to the host. */ | |
278 | if (addr_type == IPV6_ADDR_MAPPED) { | |
783ed5a7 VY |
279 | /* Binding to v4-mapped address on a v6-only socket |
280 | * makes no sense | |
281 | */ | |
282 | if (np->ipv6only) { | |
283 | err = -EINVAL; | |
284 | goto out; | |
285 | } | |
1da177e4 | 286 | v4addr = addr->sin6_addr.s6_addr32[3]; |
075de939 | 287 | if (inet_addr_type(net, v4addr) != RTN_LOCAL) { |
1da177e4 LT |
288 | err = -EADDRNOTAVAIL; |
289 | goto out; | |
290 | } | |
291 | } else { | |
292 | if (addr_type != IPV6_ADDR_ANY) { | |
293 | struct net_device *dev = NULL; | |
294 | ||
295 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
296 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
297 | addr->sin6_scope_id) { | |
298 | /* Override any existing binding, if another one | |
299 | * is supplied by user. | |
300 | */ | |
301 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
302 | } | |
1ab1457c | 303 | |
1da177e4 LT |
304 | /* Binding to link-local address requires an interface */ |
305 | if (!sk->sk_bound_dev_if) { | |
306 | err = -EINVAL; | |
307 | goto out; | |
308 | } | |
075de939 | 309 | dev = dev_get_by_index(net, sk->sk_bound_dev_if); |
1da177e4 LT |
310 | if (!dev) { |
311 | err = -ENODEV; | |
312 | goto out; | |
313 | } | |
314 | } | |
315 | ||
316 | /* ipv4 addr of the socket is invalid. Only the | |
317 | * unspecified and mapped address have a v4 equivalent. | |
318 | */ | |
319 | v4addr = LOOPBACK4_IPV6; | |
320 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
075de939 | 321 | if (!ipv6_chk_addr(net, &addr->sin6_addr, |
bfeade08 | 322 | dev, 0)) { |
1da177e4 LT |
323 | if (dev) |
324 | dev_put(dev); | |
325 | err = -EADDRNOTAVAIL; | |
326 | goto out; | |
327 | } | |
328 | } | |
329 | if (dev) | |
330 | dev_put(dev); | |
331 | } | |
332 | } | |
333 | ||
334 | inet->rcv_saddr = v4addr; | |
335 | inet->saddr = v4addr; | |
336 | ||
337 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
1ab1457c | 338 | |
1da177e4 LT |
339 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
340 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
341 | ||
342 | /* Make sure we are allowed to bind here. */ | |
343 | if (sk->sk_prot->get_port(sk, snum)) { | |
344 | inet_reset_saddr(sk); | |
345 | err = -EADDRINUSE; | |
346 | goto out; | |
347 | } | |
348 | ||
349 | if (addr_type != IPV6_ADDR_ANY) | |
350 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; | |
351 | if (snum) | |
352 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
e69a4adc | 353 | inet->sport = htons(inet->num); |
1da177e4 LT |
354 | inet->dport = 0; |
355 | inet->daddr = 0; | |
356 | out: | |
357 | release_sock(sk); | |
358 | return err; | |
359 | } | |
360 | ||
7159039a YH |
361 | EXPORT_SYMBOL(inet6_bind); |
362 | ||
1da177e4 LT |
363 | int inet6_release(struct socket *sock) |
364 | { | |
365 | struct sock *sk = sock->sk; | |
366 | ||
367 | if (sk == NULL) | |
368 | return -EINVAL; | |
369 | ||
370 | /* Free mc lists */ | |
371 | ipv6_sock_mc_close(sk); | |
372 | ||
373 | /* Free ac lists */ | |
374 | ipv6_sock_ac_close(sk); | |
375 | ||
376 | return inet_release(sock); | |
377 | } | |
378 | ||
7159039a YH |
379 | EXPORT_SYMBOL(inet6_release); |
380 | ||
7d06b2e0 | 381 | void inet6_destroy_sock(struct sock *sk) |
1da177e4 LT |
382 | { |
383 | struct ipv6_pinfo *np = inet6_sk(sk); | |
384 | struct sk_buff *skb; | |
385 | struct ipv6_txoptions *opt; | |
386 | ||
1da177e4 LT |
387 | /* Release rx options */ |
388 | ||
389 | if ((skb = xchg(&np->pktoptions, NULL)) != NULL) | |
390 | kfree_skb(skb); | |
391 | ||
392 | /* Free flowlabels */ | |
393 | fl6_free_socklist(sk); | |
394 | ||
395 | /* Free tx options */ | |
396 | ||
397 | if ((opt = xchg(&np->opt, NULL)) != NULL) | |
398 | sock_kfree_s(sk, opt, opt->tot_len); | |
1da177e4 LT |
399 | } |
400 | ||
3cf3dc6c ACM |
401 | EXPORT_SYMBOL_GPL(inet6_destroy_sock); |
402 | ||
1da177e4 LT |
403 | /* |
404 | * This does both peername and sockname. | |
405 | */ | |
1ab1457c | 406 | |
1da177e4 LT |
407 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
408 | int *uaddr_len, int peer) | |
409 | { | |
410 | struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr; | |
411 | struct sock *sk = sock->sk; | |
412 | struct inet_sock *inet = inet_sk(sk); | |
413 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1ab1457c | 414 | |
1da177e4 LT |
415 | sin->sin6_family = AF_INET6; |
416 | sin->sin6_flowinfo = 0; | |
417 | sin->sin6_scope_id = 0; | |
418 | if (peer) { | |
419 | if (!inet->dport) | |
420 | return -ENOTCONN; | |
421 | if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && | |
422 | peer == 1) | |
423 | return -ENOTCONN; | |
424 | sin->sin6_port = inet->dport; | |
425 | ipv6_addr_copy(&sin->sin6_addr, &np->daddr); | |
426 | if (np->sndflow) | |
427 | sin->sin6_flowinfo = np->flow_label; | |
428 | } else { | |
429 | if (ipv6_addr_any(&np->rcv_saddr)) | |
430 | ipv6_addr_copy(&sin->sin6_addr, &np->saddr); | |
431 | else | |
432 | ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr); | |
433 | ||
434 | sin->sin6_port = inet->sport; | |
435 | } | |
436 | if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
437 | sin->sin6_scope_id = sk->sk_bound_dev_if; | |
438 | *uaddr_len = sizeof(*sin); | |
439 | return(0); | |
440 | } | |
441 | ||
7159039a YH |
442 | EXPORT_SYMBOL(inet6_getname); |
443 | ||
1da177e4 LT |
444 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
445 | { | |
446 | struct sock *sk = sock->sk; | |
3b1e0a65 | 447 | struct net *net = sock_net(sk); |
1da177e4 | 448 | |
1ab1457c | 449 | switch(cmd) |
1da177e4 LT |
450 | { |
451 | case SIOCGSTAMP: | |
452 | return sock_get_timestamp(sk, (struct timeval __user *)arg); | |
453 | ||
ae40eb1e ED |
454 | case SIOCGSTAMPNS: |
455 | return sock_get_timestampns(sk, (struct timespec __user *)arg); | |
456 | ||
1da177e4 LT |
457 | case SIOCADDRT: |
458 | case SIOCDELRT: | |
1ab1457c | 459 | |
5578689a | 460 | return(ipv6_route_ioctl(net, cmd, (void __user *)arg)); |
1da177e4 LT |
461 | |
462 | case SIOCSIFADDR: | |
af284937 | 463 | return addrconf_add_ifaddr(net, (void __user *) arg); |
1da177e4 | 464 | case SIOCDIFADDR: |
af284937 | 465 | return addrconf_del_ifaddr(net, (void __user *) arg); |
1da177e4 | 466 | case SIOCSIFDSTADDR: |
af284937 | 467 | return addrconf_set_dstaddr(net, (void __user *) arg); |
1da177e4 | 468 | default: |
b5e5fa5e CH |
469 | if (!sk->sk_prot->ioctl) |
470 | return -ENOIOCTLCMD; | |
471 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
1da177e4 LT |
472 | } |
473 | /*NOTREACHED*/ | |
474 | return(0); | |
475 | } | |
476 | ||
7159039a YH |
477 | EXPORT_SYMBOL(inet6_ioctl); |
478 | ||
90ddc4f0 | 479 | const struct proto_ops inet6_stream_ops = { |
543d9cfe ACM |
480 | .family = PF_INET6, |
481 | .owner = THIS_MODULE, | |
482 | .release = inet6_release, | |
483 | .bind = inet6_bind, | |
484 | .connect = inet_stream_connect, /* ok */ | |
485 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
486 | .accept = inet_accept, /* ok */ | |
487 | .getname = inet6_getname, | |
488 | .poll = tcp_poll, /* ok */ | |
489 | .ioctl = inet6_ioctl, /* must change */ | |
490 | .listen = inet_listen, /* ok */ | |
491 | .shutdown = inet_shutdown, /* ok */ | |
492 | .setsockopt = sock_common_setsockopt, /* ok */ | |
493 | .getsockopt = sock_common_getsockopt, /* ok */ | |
3516ffb0 | 494 | .sendmsg = tcp_sendmsg, /* ok */ |
543d9cfe ACM |
495 | .recvmsg = sock_common_recvmsg, /* ok */ |
496 | .mmap = sock_no_mmap, | |
497 | .sendpage = tcp_sendpage, | |
a0974dd3 | 498 | .splice_read = tcp_splice_read, |
3fdadf7d | 499 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
500 | .compat_setsockopt = compat_sock_common_setsockopt, |
501 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 502 | #endif |
1da177e4 LT |
503 | }; |
504 | ||
90ddc4f0 | 505 | const struct proto_ops inet6_dgram_ops = { |
543d9cfe ACM |
506 | .family = PF_INET6, |
507 | .owner = THIS_MODULE, | |
508 | .release = inet6_release, | |
509 | .bind = inet6_bind, | |
510 | .connect = inet_dgram_connect, /* ok */ | |
511 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
512 | .accept = sock_no_accept, /* a do nothing */ | |
513 | .getname = inet6_getname, | |
514 | .poll = udp_poll, /* ok */ | |
515 | .ioctl = inet6_ioctl, /* must change */ | |
516 | .listen = sock_no_listen, /* ok */ | |
517 | .shutdown = inet_shutdown, /* ok */ | |
518 | .setsockopt = sock_common_setsockopt, /* ok */ | |
519 | .getsockopt = sock_common_getsockopt, /* ok */ | |
520 | .sendmsg = inet_sendmsg, /* ok */ | |
521 | .recvmsg = sock_common_recvmsg, /* ok */ | |
522 | .mmap = sock_no_mmap, | |
523 | .sendpage = sock_no_sendpage, | |
3fdadf7d | 524 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
525 | .compat_setsockopt = compat_sock_common_setsockopt, |
526 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 527 | #endif |
1da177e4 LT |
528 | }; |
529 | ||
530 | static struct net_proto_family inet6_family_ops = { | |
531 | .family = PF_INET6, | |
532 | .create = inet6_create, | |
533 | .owner = THIS_MODULE, | |
534 | }; | |
535 | ||
87c3efbf | 536 | int inet6_register_protosw(struct inet_protosw *p) |
1da177e4 LT |
537 | { |
538 | struct list_head *lh; | |
539 | struct inet_protosw *answer; | |
1da177e4 | 540 | struct list_head *last_perm; |
87c3efbf DL |
541 | int protocol = p->protocol; |
542 | int ret; | |
1da177e4 LT |
543 | |
544 | spin_lock_bh(&inetsw6_lock); | |
545 | ||
87c3efbf | 546 | ret = -EINVAL; |
1da177e4 LT |
547 | if (p->type >= SOCK_MAX) |
548 | goto out_illegal; | |
549 | ||
550 | /* If we are trying to override a permanent protocol, bail. */ | |
551 | answer = NULL; | |
87c3efbf | 552 | ret = -EPERM; |
1da177e4 LT |
553 | last_perm = &inetsw6[p->type]; |
554 | list_for_each(lh, &inetsw6[p->type]) { | |
555 | answer = list_entry(lh, struct inet_protosw, list); | |
556 | ||
557 | /* Check only the non-wild match. */ | |
558 | if (INET_PROTOSW_PERMANENT & answer->flags) { | |
559 | if (protocol == answer->protocol) | |
560 | break; | |
561 | last_perm = lh; | |
562 | } | |
563 | ||
564 | answer = NULL; | |
565 | } | |
566 | if (answer) | |
567 | goto out_permanent; | |
568 | ||
569 | /* Add the new entry after the last permanent entry if any, so that | |
570 | * the new entry does not override a permanent entry when matched with | |
571 | * a wild-card protocol. But it is allowed to override any existing | |
1ab1457c | 572 | * non-permanent entry. This means that when we remove this entry, the |
1da177e4 LT |
573 | * system automatically returns to the old behavior. |
574 | */ | |
575 | list_add_rcu(&p->list, last_perm); | |
87c3efbf | 576 | ret = 0; |
1da177e4 LT |
577 | out: |
578 | spin_unlock_bh(&inetsw6_lock); | |
87c3efbf | 579 | return ret; |
1da177e4 LT |
580 | |
581 | out_permanent: | |
582 | printk(KERN_ERR "Attempt to override permanent protocol %d.\n", | |
583 | protocol); | |
584 | goto out; | |
585 | ||
586 | out_illegal: | |
587 | printk(KERN_ERR | |
588 | "Ignoring attempt to register invalid socket type %d.\n", | |
589 | p->type); | |
590 | goto out; | |
591 | } | |
592 | ||
7159039a YH |
593 | EXPORT_SYMBOL(inet6_register_protosw); |
594 | ||
1da177e4 LT |
595 | void |
596 | inet6_unregister_protosw(struct inet_protosw *p) | |
597 | { | |
598 | if (INET_PROTOSW_PERMANENT & p->flags) { | |
599 | printk(KERN_ERR | |
600 | "Attempt to unregister permanent protocol %d.\n", | |
601 | p->protocol); | |
602 | } else { | |
603 | spin_lock_bh(&inetsw6_lock); | |
604 | list_del_rcu(&p->list); | |
605 | spin_unlock_bh(&inetsw6_lock); | |
606 | ||
607 | synchronize_net(); | |
608 | } | |
609 | } | |
610 | ||
7159039a YH |
611 | EXPORT_SYMBOL(inet6_unregister_protosw); |
612 | ||
b9750ce1 ACM |
613 | int inet6_sk_rebuild_header(struct sock *sk) |
614 | { | |
615 | int err; | |
616 | struct dst_entry *dst; | |
617 | struct ipv6_pinfo *np = inet6_sk(sk); | |
618 | ||
619 | dst = __sk_dst_check(sk, np->dst_cookie); | |
620 | ||
621 | if (dst == NULL) { | |
622 | struct inet_sock *inet = inet_sk(sk); | |
623 | struct in6_addr *final_p = NULL, final; | |
624 | struct flowi fl; | |
625 | ||
626 | memset(&fl, 0, sizeof(fl)); | |
627 | fl.proto = sk->sk_protocol; | |
628 | ipv6_addr_copy(&fl.fl6_dst, &np->daddr); | |
629 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
630 | fl.fl6_flowlabel = np->flow_label; | |
631 | fl.oif = sk->sk_bound_dev_if; | |
632 | fl.fl_ip_dport = inet->dport; | |
633 | fl.fl_ip_sport = inet->sport; | |
beb8d13b | 634 | security_sk_classify_flow(sk, &fl); |
b9750ce1 ACM |
635 | |
636 | if (np->opt && np->opt->srcrt) { | |
637 | struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; | |
638 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
639 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
640 | final_p = &final; | |
641 | } | |
642 | ||
643 | err = ip6_dst_lookup(sk, &dst, &fl); | |
644 | if (err) { | |
645 | sk->sk_route_caps = 0; | |
646 | return err; | |
647 | } | |
648 | if (final_p) | |
649 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
650 | ||
52479b62 | 651 | if ((err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0) { |
b9750ce1 ACM |
652 | sk->sk_err_soft = -err; |
653 | return err; | |
654 | } | |
655 | ||
8e1ef0a9 | 656 | __ip6_dst_store(sk, dst, NULL, NULL); |
b9750ce1 ACM |
657 | } |
658 | ||
659 | return 0; | |
660 | } | |
661 | ||
662 | EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); | |
663 | ||
399c07de ACM |
664 | int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb) |
665 | { | |
666 | struct ipv6_pinfo *np = inet6_sk(sk); | |
667 | struct inet6_skb_parm *opt = IP6CB(skb); | |
668 | ||
669 | if (np->rxopt.all) { | |
670 | if ((opt->hop && (np->rxopt.bits.hopopts || | |
671 | np->rxopt.bits.ohopopts)) || | |
d56f90a7 ACM |
672 | ((IPV6_FLOWINFO_MASK & |
673 | *(__be32 *)skb_network_header(skb)) && | |
399c07de ACM |
674 | np->rxopt.bits.rxflow) || |
675 | (opt->srcrt && (np->rxopt.bits.srcrt || | |
676 | np->rxopt.bits.osrcrt)) || | |
677 | ((opt->dst1 || opt->dst0) && | |
678 | (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) | |
679 | return 1; | |
680 | } | |
681 | return 0; | |
682 | } | |
683 | ||
684 | EXPORT_SYMBOL_GPL(ipv6_opt_accepted); | |
685 | ||
787e9208 | 686 | static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto) |
662397fd YH |
687 | { |
688 | struct inet6_protocol *ops = NULL; | |
689 | ||
690 | for (;;) { | |
691 | struct ipv6_opt_hdr *opth; | |
692 | int len; | |
693 | ||
694 | if (proto != NEXTHDR_HOP) { | |
695 | ops = rcu_dereference(inet6_protos[proto]); | |
696 | ||
697 | if (unlikely(!ops)) | |
698 | break; | |
699 | ||
700 | if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) | |
701 | break; | |
702 | } | |
703 | ||
704 | if (unlikely(!pskb_may_pull(skb, 8))) | |
705 | break; | |
706 | ||
707 | opth = (void *)skb->data; | |
708 | len = ipv6_optlen(opth); | |
709 | ||
710 | if (unlikely(!pskb_may_pull(skb, len))) | |
711 | break; | |
712 | ||
713 | proto = opth->nexthdr; | |
714 | __skb_pull(skb, len); | |
715 | } | |
716 | ||
787e9208 | 717 | return proto; |
662397fd YH |
718 | } |
719 | ||
720 | static int ipv6_gso_send_check(struct sk_buff *skb) | |
721 | { | |
722 | struct ipv6hdr *ipv6h; | |
723 | struct inet6_protocol *ops; | |
724 | int err = -EINVAL; | |
725 | ||
726 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
727 | goto out; | |
728 | ||
729 | ipv6h = ipv6_hdr(skb); | |
730 | __skb_pull(skb, sizeof(*ipv6h)); | |
731 | err = -EPROTONOSUPPORT; | |
732 | ||
733 | rcu_read_lock(); | |
787e9208 HX |
734 | ops = rcu_dereference(inet6_protos[ |
735 | ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); | |
736 | ||
662397fd YH |
737 | if (likely(ops && ops->gso_send_check)) { |
738 | skb_reset_transport_header(skb); | |
739 | err = ops->gso_send_check(skb); | |
740 | } | |
741 | rcu_read_unlock(); | |
742 | ||
743 | out: | |
744 | return err; | |
745 | } | |
746 | ||
747 | static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features) | |
748 | { | |
749 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
750 | struct ipv6hdr *ipv6h; | |
751 | struct inet6_protocol *ops; | |
752 | ||
753 | if (!(features & NETIF_F_V6_CSUM)) | |
754 | features &= ~NETIF_F_SG; | |
755 | ||
756 | if (unlikely(skb_shinfo(skb)->gso_type & | |
757 | ~(SKB_GSO_UDP | | |
758 | SKB_GSO_DODGY | | |
759 | SKB_GSO_TCP_ECN | | |
760 | SKB_GSO_TCPV6 | | |
761 | 0))) | |
762 | goto out; | |
763 | ||
764 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
765 | goto out; | |
766 | ||
767 | ipv6h = ipv6_hdr(skb); | |
768 | __skb_pull(skb, sizeof(*ipv6h)); | |
769 | segs = ERR_PTR(-EPROTONOSUPPORT); | |
770 | ||
771 | rcu_read_lock(); | |
787e9208 HX |
772 | ops = rcu_dereference(inet6_protos[ |
773 | ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); | |
774 | ||
662397fd YH |
775 | if (likely(ops && ops->gso_segment)) { |
776 | skb_reset_transport_header(skb); | |
777 | segs = ops->gso_segment(skb, features); | |
778 | } | |
779 | rcu_read_unlock(); | |
780 | ||
781 | if (unlikely(IS_ERR(segs))) | |
782 | goto out; | |
783 | ||
784 | for (skb = segs; skb; skb = skb->next) { | |
785 | ipv6h = ipv6_hdr(skb); | |
786 | ipv6h->payload_len = htons(skb->len - skb->mac_len - | |
787 | sizeof(*ipv6h)); | |
788 | } | |
789 | ||
790 | out: | |
791 | return segs; | |
792 | } | |
793 | ||
787e9208 HX |
794 | struct ipv6_gro_cb { |
795 | struct napi_gro_cb napi; | |
796 | int proto; | |
797 | }; | |
798 | ||
799 | #define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb) | |
800 | ||
801 | static struct sk_buff **ipv6_gro_receive(struct sk_buff **head, | |
802 | struct sk_buff *skb) | |
803 | { | |
804 | struct inet6_protocol *ops; | |
805 | struct sk_buff **pp = NULL; | |
806 | struct sk_buff *p; | |
807 | struct ipv6hdr *iph; | |
808 | unsigned int nlen; | |
809 | int flush = 1; | |
810 | int proto; | |
ebad18e9 | 811 | __wsum csum; |
787e9208 | 812 | |
86911732 HX |
813 | iph = skb_gro_header(skb, sizeof(*iph)); |
814 | if (unlikely(!iph)) | |
787e9208 HX |
815 | goto out; |
816 | ||
86911732 HX |
817 | skb_gro_pull(skb, sizeof(*iph)); |
818 | skb_set_transport_header(skb, skb_gro_offset(skb)); | |
787e9208 | 819 | |
86911732 | 820 | flush += ntohs(iph->payload_len) != skb_gro_len(skb); |
787e9208 HX |
821 | |
822 | rcu_read_lock(); | |
86911732 | 823 | proto = iph->nexthdr; |
787e9208 | 824 | ops = rcu_dereference(inet6_protos[proto]); |
86911732 HX |
825 | if (!ops || !ops->gro_receive) { |
826 | __pskb_pull(skb, skb_gro_offset(skb)); | |
827 | proto = ipv6_gso_pull_exthdrs(skb, proto); | |
828 | skb_gro_pull(skb, -skb_transport_offset(skb)); | |
829 | skb_reset_transport_header(skb); | |
830 | __skb_push(skb, skb_gro_offset(skb)); | |
831 | ||
832 | if (!ops || !ops->gro_receive) | |
833 | goto out_unlock; | |
834 | ||
835 | iph = ipv6_hdr(skb); | |
836 | } | |
837 | ||
838 | IPV6_GRO_CB(skb)->proto = proto; | |
787e9208 HX |
839 | |
840 | flush--; | |
787e9208 HX |
841 | nlen = skb_network_header_len(skb); |
842 | ||
843 | for (p = *head; p; p = p->next) { | |
844 | struct ipv6hdr *iph2; | |
845 | ||
846 | if (!NAPI_GRO_CB(p)->same_flow) | |
847 | continue; | |
848 | ||
849 | iph2 = ipv6_hdr(p); | |
850 | ||
851 | /* All fields must match except length. */ | |
852 | if (nlen != skb_network_header_len(p) || | |
853 | memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) || | |
854 | memcmp(&iph->nexthdr, &iph2->nexthdr, | |
855 | nlen - offsetof(struct ipv6hdr, nexthdr))) { | |
856 | NAPI_GRO_CB(p)->same_flow = 0; | |
857 | continue; | |
858 | } | |
859 | ||
860 | NAPI_GRO_CB(p)->flush |= flush; | |
861 | } | |
862 | ||
863 | NAPI_GRO_CB(skb)->flush |= flush; | |
864 | ||
ebad18e9 HX |
865 | csum = skb->csum; |
866 | skb_postpull_rcsum(skb, iph, skb_network_header_len(skb)); | |
867 | ||
787e9208 HX |
868 | pp = ops->gro_receive(head, skb); |
869 | ||
ebad18e9 HX |
870 | skb->csum = csum; |
871 | ||
787e9208 HX |
872 | out_unlock: |
873 | rcu_read_unlock(); | |
874 | ||
875 | out: | |
876 | NAPI_GRO_CB(skb)->flush |= flush; | |
877 | ||
878 | return pp; | |
879 | } | |
880 | ||
881 | static int ipv6_gro_complete(struct sk_buff *skb) | |
882 | { | |
883 | struct inet6_protocol *ops; | |
884 | struct ipv6hdr *iph = ipv6_hdr(skb); | |
885 | int err = -ENOSYS; | |
886 | ||
887 | iph->payload_len = htons(skb->len - skb_network_offset(skb) - | |
888 | sizeof(*iph)); | |
889 | ||
890 | rcu_read_lock(); | |
891 | ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]); | |
892 | if (WARN_ON(!ops || !ops->gro_complete)) | |
893 | goto out_unlock; | |
894 | ||
895 | err = ops->gro_complete(skb); | |
896 | ||
897 | out_unlock: | |
898 | rcu_read_unlock(); | |
899 | ||
900 | return err; | |
901 | } | |
902 | ||
7546dd97 | 903 | static struct packet_type ipv6_packet_type __read_mostly = { |
09640e63 | 904 | .type = cpu_to_be16(ETH_P_IPV6), |
662397fd YH |
905 | .func = ipv6_rcv, |
906 | .gso_send_check = ipv6_gso_send_check, | |
907 | .gso_segment = ipv6_gso_segment, | |
787e9208 HX |
908 | .gro_receive = ipv6_gro_receive, |
909 | .gro_complete = ipv6_gro_complete, | |
662397fd YH |
910 | }; |
911 | ||
912 | static int __init ipv6_packet_init(void) | |
913 | { | |
914 | dev_add_pack(&ipv6_packet_type); | |
915 | return 0; | |
916 | } | |
917 | ||
918 | static void ipv6_packet_cleanup(void) | |
919 | { | |
920 | dev_remove_pack(&ipv6_packet_type); | |
921 | } | |
922 | ||
e43291cb DL |
923 | static int __net_init ipv6_init_mibs(struct net *net) |
924 | { | |
0c7ed677 DL |
925 | if (snmp_mib_init((void **)net->mib.udp_stats_in6, |
926 | sizeof (struct udp_mib)) < 0) | |
927 | return -ENOMEM; | |
be713a44 DL |
928 | if (snmp_mib_init((void **)net->mib.udplite_stats_in6, |
929 | sizeof (struct udp_mib)) < 0) | |
930 | goto err_udplite_mib; | |
9261e537 DL |
931 | if (snmp_mib_init((void **)net->mib.ipv6_statistics, |
932 | sizeof(struct ipstats_mib)) < 0) | |
933 | goto err_ip_mib; | |
934 | if (snmp_mib_init((void **)net->mib.icmpv6_statistics, | |
935 | sizeof(struct icmpv6_mib)) < 0) | |
936 | goto err_icmp_mib; | |
937 | if (snmp_mib_init((void **)net->mib.icmpv6msg_statistics, | |
938 | sizeof(struct icmpv6msg_mib)) < 0) | |
939 | goto err_icmpmsg_mib; | |
e43291cb | 940 | return 0; |
be713a44 | 941 | |
9261e537 DL |
942 | err_icmpmsg_mib: |
943 | snmp_mib_free((void **)net->mib.icmpv6_statistics); | |
944 | err_icmp_mib: | |
945 | snmp_mib_free((void **)net->mib.ipv6_statistics); | |
946 | err_ip_mib: | |
947 | snmp_mib_free((void **)net->mib.udplite_stats_in6); | |
be713a44 DL |
948 | err_udplite_mib: |
949 | snmp_mib_free((void **)net->mib.udp_stats_in6); | |
950 | return -ENOMEM; | |
e43291cb DL |
951 | } |
952 | ||
953 | static void __net_exit ipv6_cleanup_mibs(struct net *net) | |
954 | { | |
0c7ed677 | 955 | snmp_mib_free((void **)net->mib.udp_stats_in6); |
be713a44 | 956 | snmp_mib_free((void **)net->mib.udplite_stats_in6); |
9261e537 DL |
957 | snmp_mib_free((void **)net->mib.ipv6_statistics); |
958 | snmp_mib_free((void **)net->mib.icmpv6_statistics); | |
959 | snmp_mib_free((void **)net->mib.icmpv6msg_statistics); | |
e43291cb DL |
960 | } |
961 | ||
e7dc8494 | 962 | static int __net_init inet6_net_init(struct net *net) |
81c1c178 | 963 | { |
0c96d8c5 DL |
964 | int err = 0; |
965 | ||
99bc9c4e | 966 | net->ipv6.sysctl.bindv6only = 0; |
41a76906 | 967 | net->ipv6.sysctl.icmpv6_time = 1*HZ; |
e71e0349 | 968 | |
e43291cb DL |
969 | err = ipv6_init_mibs(net); |
970 | if (err) | |
971 | return err; | |
0c96d8c5 DL |
972 | #ifdef CONFIG_PROC_FS |
973 | err = udp6_proc_init(net); | |
974 | if (err) | |
975 | goto out; | |
6f8b13bc DL |
976 | err = tcp6_proc_init(net); |
977 | if (err) | |
978 | goto proc_tcp6_fail; | |
6ab57e7e DL |
979 | err = ac6_proc_init(net); |
980 | if (err) | |
981 | goto proc_ac6_fail; | |
0c96d8c5 DL |
982 | #endif |
983 | return err; | |
6f8b13bc DL |
984 | |
985 | #ifdef CONFIG_PROC_FS | |
6ab57e7e DL |
986 | proc_ac6_fail: |
987 | tcp6_proc_exit(net); | |
6f8b13bc DL |
988 | proc_tcp6_fail: |
989 | udp6_proc_exit(net); | |
e43291cb DL |
990 | out: |
991 | ipv6_cleanup_mibs(net); | |
992 | return err; | |
6f8b13bc | 993 | #endif |
81c1c178 DL |
994 | } |
995 | ||
996 | static void inet6_net_exit(struct net *net) | |
997 | { | |
0c96d8c5 DL |
998 | #ifdef CONFIG_PROC_FS |
999 | udp6_proc_exit(net); | |
6f8b13bc | 1000 | tcp6_proc_exit(net); |
6ab57e7e | 1001 | ac6_proc_exit(net); |
0c96d8c5 | 1002 | #endif |
e43291cb | 1003 | ipv6_cleanup_mibs(net); |
81c1c178 DL |
1004 | } |
1005 | ||
1006 | static struct pernet_operations inet6_net_ops = { | |
1007 | .init = inet6_net_init, | |
1008 | .exit = inet6_net_exit, | |
1009 | }; | |
1010 | ||
1da177e4 LT |
1011 | static int __init inet6_init(void) |
1012 | { | |
1013 | struct sk_buff *dummy_skb; | |
1ab1457c | 1014 | struct list_head *r; |
fe7ca2e1 | 1015 | int err = 0; |
1da177e4 | 1016 | |
ef047f5e YH |
1017 | BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)); |
1018 | ||
fe7ca2e1 BH |
1019 | /* Register the socket-side information for inet6_create. */ |
1020 | for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) | |
1021 | INIT_LIST_HEAD(r); | |
1022 | ||
1023 | if (disable_ipv6) { | |
1024 | printk(KERN_INFO | |
1025 | "IPv6: Loaded, but administratively disabled, " | |
1026 | "reboot required to enable\n"); | |
1027 | goto out; | |
1028 | } | |
1029 | ||
1da177e4 LT |
1030 | err = proto_register(&tcpv6_prot, 1); |
1031 | if (err) | |
1032 | goto out; | |
1033 | ||
1034 | err = proto_register(&udpv6_prot, 1); | |
1035 | if (err) | |
1036 | goto out_unregister_tcp_proto; | |
1037 | ||
ba4e58ec | 1038 | err = proto_register(&udplitev6_prot, 1); |
1da177e4 LT |
1039 | if (err) |
1040 | goto out_unregister_udp_proto; | |
1041 | ||
ba4e58ec GR |
1042 | err = proto_register(&rawv6_prot, 1); |
1043 | if (err) | |
1044 | goto out_unregister_udplite_proto; | |
1045 | ||
1da177e4 | 1046 | |
1da177e4 LT |
1047 | /* We MUST register RAW sockets before we create the ICMP6, |
1048 | * IGMP6, or NDISC control sockets. | |
1049 | */ | |
7f4e4868 DL |
1050 | err = rawv6_init(); |
1051 | if (err) | |
1052 | goto out_unregister_raw_proto; | |
1da177e4 LT |
1053 | |
1054 | /* Register the family here so that the init calls below will | |
1055 | * be able to create sockets. (?? is this dangerous ??) | |
1056 | */ | |
8eb55910 DM |
1057 | err = sock_register(&inet6_family_ops); |
1058 | if (err) | |
7f4e4868 | 1059 | goto out_sock_register_fail; |
1da177e4 | 1060 | |
eeb61f71 AV |
1061 | #ifdef CONFIG_SYSCTL |
1062 | err = ipv6_static_sysctl_register(); | |
1063 | if (err) | |
1064 | goto static_sysctl_fail; | |
1065 | #endif | |
1da177e4 LT |
1066 | /* |
1067 | * ipngwg API draft makes clear that the correct semantics | |
1068 | * for TCP and UDP is to consider one TCP and UDP instance | |
1069 | * in a host availiable by both INET and INET6 APIs and | |
1070 | * able to communicate via both network protocols. | |
1071 | */ | |
1072 | ||
81c1c178 DL |
1073 | err = register_pernet_subsys(&inet6_net_ops); |
1074 | if (err) | |
1075 | goto register_pernet_fail; | |
9b0f976f | 1076 | err = icmpv6_init(); |
1da177e4 LT |
1077 | if (err) |
1078 | goto icmp_fail; | |
623d1a1a WC |
1079 | err = ip6_mr_init(); |
1080 | if (err) | |
1081 | goto ipmr_fail; | |
9b0f976f | 1082 | err = ndisc_init(); |
1da177e4 LT |
1083 | if (err) |
1084 | goto ndisc_fail; | |
9b0f976f | 1085 | err = igmp6_init(); |
1da177e4 LT |
1086 | if (err) |
1087 | goto igmp_fail; | |
2cc7d573 HW |
1088 | err = ipv6_netfilter_init(); |
1089 | if (err) | |
1090 | goto netfilter_fail; | |
1da177e4 LT |
1091 | /* Create /proc/foo6 entries. */ |
1092 | #ifdef CONFIG_PROC_FS | |
1093 | err = -ENOMEM; | |
1094 | if (raw6_proc_init()) | |
1095 | goto proc_raw6_fail; | |
ba4e58ec GR |
1096 | if (udplite6_proc_init()) |
1097 | goto proc_udplite6_fail; | |
1da177e4 LT |
1098 | if (ipv6_misc_proc_init()) |
1099 | goto proc_misc6_fail; | |
1da177e4 LT |
1100 | if (if6_proc_init()) |
1101 | goto proc_if6_fail; | |
1102 | #endif | |
e2fddf5e DL |
1103 | err = ip6_route_init(); |
1104 | if (err) | |
1105 | goto ip6_route_fail; | |
0a3e78ac DL |
1106 | err = ip6_flowlabel_init(); |
1107 | if (err) | |
1108 | goto ip6_flowlabel_fail; | |
1da177e4 LT |
1109 | err = addrconf_init(); |
1110 | if (err) | |
1111 | goto addrconf_fail; | |
1da177e4 LT |
1112 | |
1113 | /* Init v6 extension headers. */ | |
248b238d DL |
1114 | err = ipv6_exthdrs_init(); |
1115 | if (err) | |
1116 | goto ipv6_exthdrs_fail; | |
1117 | ||
853cbbaa DL |
1118 | err = ipv6_frag_init(); |
1119 | if (err) | |
1120 | goto ipv6_frag_fail; | |
1da177e4 LT |
1121 | |
1122 | /* Init v6 transport protocols. */ | |
7f4e4868 DL |
1123 | err = udpv6_init(); |
1124 | if (err) | |
1125 | goto udpv6_fail; | |
e2ed4052 | 1126 | |
7f4e4868 DL |
1127 | err = udplitev6_init(); |
1128 | if (err) | |
1129 | goto udplitev6_fail; | |
1130 | ||
1131 | err = tcpv6_init(); | |
1132 | if (err) | |
1133 | goto tcpv6_fail; | |
1134 | ||
1135 | err = ipv6_packet_init(); | |
1136 | if (err) | |
1137 | goto ipv6_packet_fail; | |
94911fe3 BT |
1138 | |
1139 | #ifdef CONFIG_SYSCTL | |
1140 | err = ipv6_sysctl_register(); | |
1141 | if (err) | |
1142 | goto sysctl_fail; | |
1143 | #endif | |
1da177e4 LT |
1144 | out: |
1145 | return err; | |
1146 | ||
94911fe3 BT |
1147 | #ifdef CONFIG_SYSCTL |
1148 | sysctl_fail: | |
1149 | ipv6_packet_cleanup(); | |
1150 | #endif | |
7f4e4868 DL |
1151 | ipv6_packet_fail: |
1152 | tcpv6_exit(); | |
1153 | tcpv6_fail: | |
1154 | udplitev6_exit(); | |
1155 | udplitev6_fail: | |
1156 | udpv6_exit(); | |
1157 | udpv6_fail: | |
1158 | ipv6_frag_exit(); | |
853cbbaa DL |
1159 | ipv6_frag_fail: |
1160 | ipv6_exthdrs_exit(); | |
248b238d DL |
1161 | ipv6_exthdrs_fail: |
1162 | addrconf_cleanup(); | |
1da177e4 LT |
1163 | addrconf_fail: |
1164 | ip6_flowlabel_cleanup(); | |
0a3e78ac | 1165 | ip6_flowlabel_fail: |
1da177e4 | 1166 | ip6_route_cleanup(); |
e2fddf5e | 1167 | ip6_route_fail: |
1da177e4 LT |
1168 | #ifdef CONFIG_PROC_FS |
1169 | if6_proc_exit(); | |
1170 | proc_if6_fail: | |
1da177e4 LT |
1171 | ipv6_misc_proc_exit(); |
1172 | proc_misc6_fail: | |
ba4e58ec GR |
1173 | udplite6_proc_exit(); |
1174 | proc_udplite6_fail: | |
1da177e4 LT |
1175 | raw6_proc_exit(); |
1176 | proc_raw6_fail: | |
1177 | #endif | |
2cc7d573 HW |
1178 | ipv6_netfilter_fini(); |
1179 | netfilter_fail: | |
1da177e4 LT |
1180 | igmp6_cleanup(); |
1181 | igmp_fail: | |
1182 | ndisc_cleanup(); | |
1183 | ndisc_fail: | |
623d1a1a WC |
1184 | ip6_mr_cleanup(); |
1185 | ipmr_fail: | |
1da177e4 LT |
1186 | icmpv6_cleanup(); |
1187 | icmp_fail: | |
81c1c178 DL |
1188 | unregister_pernet_subsys(&inet6_net_ops); |
1189 | register_pernet_fail: | |
eeb61f71 AV |
1190 | #ifdef CONFIG_SYSCTL |
1191 | ipv6_static_sysctl_unregister(); | |
1192 | static_sysctl_fail: | |
1193 | #endif | |
8eb55910 | 1194 | sock_unregister(PF_INET6); |
e2fddf5e | 1195 | rtnl_unregister_all(PF_INET6); |
7f4e4868 DL |
1196 | out_sock_register_fail: |
1197 | rawv6_exit(); | |
1da177e4 LT |
1198 | out_unregister_raw_proto: |
1199 | proto_unregister(&rawv6_prot); | |
ba4e58ec GR |
1200 | out_unregister_udplite_proto: |
1201 | proto_unregister(&udplitev6_prot); | |
1da177e4 LT |
1202 | out_unregister_udp_proto: |
1203 | proto_unregister(&udpv6_prot); | |
1204 | out_unregister_tcp_proto: | |
1205 | proto_unregister(&tcpv6_prot); | |
1206 | goto out; | |
1207 | } | |
1208 | module_init(inet6_init); | |
1209 | ||
1210 | static void __exit inet6_exit(void) | |
1211 | { | |
ff8cf9a9 JD |
1212 | if (disable_ipv6) |
1213 | return; | |
1214 | ||
1da177e4 LT |
1215 | /* First of all disallow new sockets creation. */ |
1216 | sock_unregister(PF_INET6); | |
c127ea2c TG |
1217 | /* Disallow any further netlink messages */ |
1218 | rtnl_unregister_all(PF_INET6); | |
ca17c233 | 1219 | |
94911fe3 BT |
1220 | #ifdef CONFIG_SYSCTL |
1221 | ipv6_sysctl_unregister(); | |
1222 | #endif | |
7f4e4868 DL |
1223 | udpv6_exit(); |
1224 | udplitev6_exit(); | |
1225 | tcpv6_exit(); | |
1226 | ||
ca17c233 JJ |
1227 | /* Cleanup code parts. */ |
1228 | ipv6_packet_cleanup(); | |
853cbbaa | 1229 | ipv6_frag_exit(); |
248b238d | 1230 | ipv6_exthdrs_exit(); |
ca17c233 JJ |
1231 | addrconf_cleanup(); |
1232 | ip6_flowlabel_cleanup(); | |
1233 | ip6_route_cleanup(); | |
1da177e4 | 1234 | #ifdef CONFIG_PROC_FS |
ca17c233 JJ |
1235 | |
1236 | /* Cleanup code parts. */ | |
1da177e4 | 1237 | if6_proc_exit(); |
1ab1457c | 1238 | ipv6_misc_proc_exit(); |
1ab1457c | 1239 | udplite6_proc_exit(); |
1ab1457c | 1240 | raw6_proc_exit(); |
2c8d7ca0 | 1241 | #endif |
2cc7d573 | 1242 | ipv6_netfilter_fini(); |
ca17c233 | 1243 | igmp6_cleanup(); |
1da177e4 | 1244 | ndisc_cleanup(); |
623d1a1a | 1245 | ip6_mr_cleanup(); |
1da177e4 | 1246 | icmpv6_cleanup(); |
7f4e4868 | 1247 | rawv6_exit(); |
94911fe3 | 1248 | |
81c1c178 | 1249 | unregister_pernet_subsys(&inet6_net_ops); |
eeb61f71 AV |
1250 | #ifdef CONFIG_SYSCTL |
1251 | ipv6_static_sysctl_unregister(); | |
1252 | #endif | |
1da177e4 | 1253 | proto_unregister(&rawv6_prot); |
ca17c233 | 1254 | proto_unregister(&udplitev6_prot); |
1da177e4 LT |
1255 | proto_unregister(&udpv6_prot); |
1256 | proto_unregister(&tcpv6_prot); | |
1257 | } | |
1258 | module_exit(inet6_exit); | |
1259 | ||
1260 | MODULE_ALIAS_NETPROTO(PF_INET6); |