Commit | Line | Data |
---|---|---|
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) { | |
63d9950b VY |
279 | int chk_addr_ret; |
280 | ||
783ed5a7 VY |
281 | /* Binding to v4-mapped address on a v6-only socket |
282 | * makes no sense | |
283 | */ | |
284 | if (np->ipv6only) { | |
285 | err = -EINVAL; | |
286 | goto out; | |
287 | } | |
63d9950b VY |
288 | |
289 | /* Reproduce AF_INET checks to make the bindings consitant */ | |
1da177e4 | 290 | v4addr = addr->sin6_addr.s6_addr32[3]; |
63d9950b VY |
291 | chk_addr_ret = inet_addr_type(net, v4addr); |
292 | if (!sysctl_ip_nonlocal_bind && | |
293 | !(inet->freebind || inet->transparent) && | |
294 | v4addr != htonl(INADDR_ANY) && | |
295 | chk_addr_ret != RTN_LOCAL && | |
296 | chk_addr_ret != RTN_MULTICAST && | |
297 | chk_addr_ret != RTN_BROADCAST) | |
1da177e4 | 298 | goto out; |
1da177e4 LT |
299 | } else { |
300 | if (addr_type != IPV6_ADDR_ANY) { | |
301 | struct net_device *dev = NULL; | |
302 | ||
303 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
304 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
305 | addr->sin6_scope_id) { | |
306 | /* Override any existing binding, if another one | |
307 | * is supplied by user. | |
308 | */ | |
309 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
310 | } | |
1ab1457c | 311 | |
1da177e4 LT |
312 | /* Binding to link-local address requires an interface */ |
313 | if (!sk->sk_bound_dev_if) { | |
314 | err = -EINVAL; | |
315 | goto out; | |
316 | } | |
075de939 | 317 | dev = dev_get_by_index(net, sk->sk_bound_dev_if); |
1da177e4 LT |
318 | if (!dev) { |
319 | err = -ENODEV; | |
320 | goto out; | |
321 | } | |
322 | } | |
323 | ||
324 | /* ipv4 addr of the socket is invalid. Only the | |
325 | * unspecified and mapped address have a v4 equivalent. | |
326 | */ | |
327 | v4addr = LOOPBACK4_IPV6; | |
328 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
075de939 | 329 | if (!ipv6_chk_addr(net, &addr->sin6_addr, |
bfeade08 | 330 | dev, 0)) { |
1da177e4 LT |
331 | if (dev) |
332 | dev_put(dev); | |
333 | err = -EADDRNOTAVAIL; | |
334 | goto out; | |
335 | } | |
336 | } | |
337 | if (dev) | |
338 | dev_put(dev); | |
339 | } | |
340 | } | |
341 | ||
342 | inet->rcv_saddr = v4addr; | |
343 | inet->saddr = v4addr; | |
344 | ||
345 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
1ab1457c | 346 | |
1da177e4 LT |
347 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
348 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
349 | ||
350 | /* Make sure we are allowed to bind here. */ | |
351 | if (sk->sk_prot->get_port(sk, snum)) { | |
352 | inet_reset_saddr(sk); | |
353 | err = -EADDRINUSE; | |
354 | goto out; | |
355 | } | |
356 | ||
0f8d3c7a | 357 | if (addr_type != IPV6_ADDR_ANY) { |
1da177e4 | 358 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
0f8d3c7a VY |
359 | if (addr_type != IPV6_ADDR_MAPPED) |
360 | np->ipv6only = 1; | |
361 | } | |
1da177e4 LT |
362 | if (snum) |
363 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
e69a4adc | 364 | inet->sport = htons(inet->num); |
1da177e4 LT |
365 | inet->dport = 0; |
366 | inet->daddr = 0; | |
367 | out: | |
368 | release_sock(sk); | |
369 | return err; | |
370 | } | |
371 | ||
7159039a YH |
372 | EXPORT_SYMBOL(inet6_bind); |
373 | ||
1da177e4 LT |
374 | int inet6_release(struct socket *sock) |
375 | { | |
376 | struct sock *sk = sock->sk; | |
377 | ||
378 | if (sk == NULL) | |
379 | return -EINVAL; | |
380 | ||
381 | /* Free mc lists */ | |
382 | ipv6_sock_mc_close(sk); | |
383 | ||
384 | /* Free ac lists */ | |
385 | ipv6_sock_ac_close(sk); | |
386 | ||
387 | return inet_release(sock); | |
388 | } | |
389 | ||
7159039a YH |
390 | EXPORT_SYMBOL(inet6_release); |
391 | ||
7d06b2e0 | 392 | void inet6_destroy_sock(struct sock *sk) |
1da177e4 LT |
393 | { |
394 | struct ipv6_pinfo *np = inet6_sk(sk); | |
395 | struct sk_buff *skb; | |
396 | struct ipv6_txoptions *opt; | |
397 | ||
1da177e4 LT |
398 | /* Release rx options */ |
399 | ||
400 | if ((skb = xchg(&np->pktoptions, NULL)) != NULL) | |
401 | kfree_skb(skb); | |
402 | ||
403 | /* Free flowlabels */ | |
404 | fl6_free_socklist(sk); | |
405 | ||
406 | /* Free tx options */ | |
407 | ||
408 | if ((opt = xchg(&np->opt, NULL)) != NULL) | |
409 | sock_kfree_s(sk, opt, opt->tot_len); | |
1da177e4 LT |
410 | } |
411 | ||
3cf3dc6c ACM |
412 | EXPORT_SYMBOL_GPL(inet6_destroy_sock); |
413 | ||
1da177e4 LT |
414 | /* |
415 | * This does both peername and sockname. | |
416 | */ | |
1ab1457c | 417 | |
1da177e4 LT |
418 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
419 | int *uaddr_len, int peer) | |
420 | { | |
421 | struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr; | |
422 | struct sock *sk = sock->sk; | |
423 | struct inet_sock *inet = inet_sk(sk); | |
424 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1ab1457c | 425 | |
1da177e4 LT |
426 | sin->sin6_family = AF_INET6; |
427 | sin->sin6_flowinfo = 0; | |
428 | sin->sin6_scope_id = 0; | |
429 | if (peer) { | |
430 | if (!inet->dport) | |
431 | return -ENOTCONN; | |
432 | if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && | |
433 | peer == 1) | |
434 | return -ENOTCONN; | |
435 | sin->sin6_port = inet->dport; | |
436 | ipv6_addr_copy(&sin->sin6_addr, &np->daddr); | |
437 | if (np->sndflow) | |
438 | sin->sin6_flowinfo = np->flow_label; | |
439 | } else { | |
440 | if (ipv6_addr_any(&np->rcv_saddr)) | |
441 | ipv6_addr_copy(&sin->sin6_addr, &np->saddr); | |
442 | else | |
443 | ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr); | |
444 | ||
445 | sin->sin6_port = inet->sport; | |
446 | } | |
447 | if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
448 | sin->sin6_scope_id = sk->sk_bound_dev_if; | |
449 | *uaddr_len = sizeof(*sin); | |
450 | return(0); | |
451 | } | |
452 | ||
7159039a YH |
453 | EXPORT_SYMBOL(inet6_getname); |
454 | ||
1da177e4 LT |
455 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
456 | { | |
457 | struct sock *sk = sock->sk; | |
3b1e0a65 | 458 | struct net *net = sock_net(sk); |
1da177e4 | 459 | |
1ab1457c | 460 | switch(cmd) |
1da177e4 LT |
461 | { |
462 | case SIOCGSTAMP: | |
463 | return sock_get_timestamp(sk, (struct timeval __user *)arg); | |
464 | ||
ae40eb1e ED |
465 | case SIOCGSTAMPNS: |
466 | return sock_get_timestampns(sk, (struct timespec __user *)arg); | |
467 | ||
1da177e4 LT |
468 | case SIOCADDRT: |
469 | case SIOCDELRT: | |
1ab1457c | 470 | |
5578689a | 471 | return(ipv6_route_ioctl(net, cmd, (void __user *)arg)); |
1da177e4 LT |
472 | |
473 | case SIOCSIFADDR: | |
af284937 | 474 | return addrconf_add_ifaddr(net, (void __user *) arg); |
1da177e4 | 475 | case SIOCDIFADDR: |
af284937 | 476 | return addrconf_del_ifaddr(net, (void __user *) arg); |
1da177e4 | 477 | case SIOCSIFDSTADDR: |
af284937 | 478 | return addrconf_set_dstaddr(net, (void __user *) arg); |
1da177e4 | 479 | default: |
b5e5fa5e CH |
480 | if (!sk->sk_prot->ioctl) |
481 | return -ENOIOCTLCMD; | |
482 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
1da177e4 LT |
483 | } |
484 | /*NOTREACHED*/ | |
485 | return(0); | |
486 | } | |
487 | ||
7159039a YH |
488 | EXPORT_SYMBOL(inet6_ioctl); |
489 | ||
90ddc4f0 | 490 | const struct proto_ops inet6_stream_ops = { |
543d9cfe ACM |
491 | .family = PF_INET6, |
492 | .owner = THIS_MODULE, | |
493 | .release = inet6_release, | |
494 | .bind = inet6_bind, | |
495 | .connect = inet_stream_connect, /* ok */ | |
496 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
497 | .accept = inet_accept, /* ok */ | |
498 | .getname = inet6_getname, | |
499 | .poll = tcp_poll, /* ok */ | |
500 | .ioctl = inet6_ioctl, /* must change */ | |
501 | .listen = inet_listen, /* ok */ | |
502 | .shutdown = inet_shutdown, /* ok */ | |
503 | .setsockopt = sock_common_setsockopt, /* ok */ | |
504 | .getsockopt = sock_common_getsockopt, /* ok */ | |
3516ffb0 | 505 | .sendmsg = tcp_sendmsg, /* ok */ |
543d9cfe ACM |
506 | .recvmsg = sock_common_recvmsg, /* ok */ |
507 | .mmap = sock_no_mmap, | |
508 | .sendpage = tcp_sendpage, | |
a0974dd3 | 509 | .splice_read = tcp_splice_read, |
3fdadf7d | 510 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
511 | .compat_setsockopt = compat_sock_common_setsockopt, |
512 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 513 | #endif |
1da177e4 LT |
514 | }; |
515 | ||
90ddc4f0 | 516 | const struct proto_ops inet6_dgram_ops = { |
543d9cfe ACM |
517 | .family = PF_INET6, |
518 | .owner = THIS_MODULE, | |
519 | .release = inet6_release, | |
520 | .bind = inet6_bind, | |
521 | .connect = inet_dgram_connect, /* ok */ | |
522 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
523 | .accept = sock_no_accept, /* a do nothing */ | |
524 | .getname = inet6_getname, | |
525 | .poll = udp_poll, /* ok */ | |
526 | .ioctl = inet6_ioctl, /* must change */ | |
527 | .listen = sock_no_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 = sock_common_recvmsg, /* ok */ | |
533 | .mmap = sock_no_mmap, | |
534 | .sendpage = sock_no_sendpage, | |
3fdadf7d | 535 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
536 | .compat_setsockopt = compat_sock_common_setsockopt, |
537 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 538 | #endif |
1da177e4 LT |
539 | }; |
540 | ||
541 | static struct net_proto_family inet6_family_ops = { | |
542 | .family = PF_INET6, | |
543 | .create = inet6_create, | |
544 | .owner = THIS_MODULE, | |
545 | }; | |
546 | ||
87c3efbf | 547 | int inet6_register_protosw(struct inet_protosw *p) |
1da177e4 LT |
548 | { |
549 | struct list_head *lh; | |
550 | struct inet_protosw *answer; | |
1da177e4 | 551 | struct list_head *last_perm; |
87c3efbf DL |
552 | int protocol = p->protocol; |
553 | int ret; | |
1da177e4 LT |
554 | |
555 | spin_lock_bh(&inetsw6_lock); | |
556 | ||
87c3efbf | 557 | ret = -EINVAL; |
1da177e4 LT |
558 | if (p->type >= SOCK_MAX) |
559 | goto out_illegal; | |
560 | ||
561 | /* If we are trying to override a permanent protocol, bail. */ | |
562 | answer = NULL; | |
87c3efbf | 563 | ret = -EPERM; |
1da177e4 LT |
564 | last_perm = &inetsw6[p->type]; |
565 | list_for_each(lh, &inetsw6[p->type]) { | |
566 | answer = list_entry(lh, struct inet_protosw, list); | |
567 | ||
568 | /* Check only the non-wild match. */ | |
569 | if (INET_PROTOSW_PERMANENT & answer->flags) { | |
570 | if (protocol == answer->protocol) | |
571 | break; | |
572 | last_perm = lh; | |
573 | } | |
574 | ||
575 | answer = NULL; | |
576 | } | |
577 | if (answer) | |
578 | goto out_permanent; | |
579 | ||
580 | /* Add the new entry after the last permanent entry if any, so that | |
581 | * the new entry does not override a permanent entry when matched with | |
582 | * a wild-card protocol. But it is allowed to override any existing | |
1ab1457c | 583 | * non-permanent entry. This means that when we remove this entry, the |
1da177e4 LT |
584 | * system automatically returns to the old behavior. |
585 | */ | |
586 | list_add_rcu(&p->list, last_perm); | |
87c3efbf | 587 | ret = 0; |
1da177e4 LT |
588 | out: |
589 | spin_unlock_bh(&inetsw6_lock); | |
87c3efbf | 590 | return ret; |
1da177e4 LT |
591 | |
592 | out_permanent: | |
593 | printk(KERN_ERR "Attempt to override permanent protocol %d.\n", | |
594 | protocol); | |
595 | goto out; | |
596 | ||
597 | out_illegal: | |
598 | printk(KERN_ERR | |
599 | "Ignoring attempt to register invalid socket type %d.\n", | |
600 | p->type); | |
601 | goto out; | |
602 | } | |
603 | ||
7159039a YH |
604 | EXPORT_SYMBOL(inet6_register_protosw); |
605 | ||
1da177e4 LT |
606 | void |
607 | inet6_unregister_protosw(struct inet_protosw *p) | |
608 | { | |
609 | if (INET_PROTOSW_PERMANENT & p->flags) { | |
610 | printk(KERN_ERR | |
611 | "Attempt to unregister permanent protocol %d.\n", | |
612 | p->protocol); | |
613 | } else { | |
614 | spin_lock_bh(&inetsw6_lock); | |
615 | list_del_rcu(&p->list); | |
616 | spin_unlock_bh(&inetsw6_lock); | |
617 | ||
618 | synchronize_net(); | |
619 | } | |
620 | } | |
621 | ||
7159039a YH |
622 | EXPORT_SYMBOL(inet6_unregister_protosw); |
623 | ||
b9750ce1 ACM |
624 | int inet6_sk_rebuild_header(struct sock *sk) |
625 | { | |
626 | int err; | |
627 | struct dst_entry *dst; | |
628 | struct ipv6_pinfo *np = inet6_sk(sk); | |
629 | ||
630 | dst = __sk_dst_check(sk, np->dst_cookie); | |
631 | ||
632 | if (dst == NULL) { | |
633 | struct inet_sock *inet = inet_sk(sk); | |
634 | struct in6_addr *final_p = NULL, final; | |
635 | struct flowi fl; | |
636 | ||
637 | memset(&fl, 0, sizeof(fl)); | |
638 | fl.proto = sk->sk_protocol; | |
639 | ipv6_addr_copy(&fl.fl6_dst, &np->daddr); | |
640 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
641 | fl.fl6_flowlabel = np->flow_label; | |
642 | fl.oif = sk->sk_bound_dev_if; | |
643 | fl.fl_ip_dport = inet->dport; | |
644 | fl.fl_ip_sport = inet->sport; | |
beb8d13b | 645 | security_sk_classify_flow(sk, &fl); |
b9750ce1 ACM |
646 | |
647 | if (np->opt && np->opt->srcrt) { | |
648 | struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; | |
649 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
650 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
651 | final_p = &final; | |
652 | } | |
653 | ||
654 | err = ip6_dst_lookup(sk, &dst, &fl); | |
655 | if (err) { | |
656 | sk->sk_route_caps = 0; | |
657 | return err; | |
658 | } | |
659 | if (final_p) | |
660 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
661 | ||
52479b62 | 662 | if ((err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0) { |
b9750ce1 ACM |
663 | sk->sk_err_soft = -err; |
664 | return err; | |
665 | } | |
666 | ||
8e1ef0a9 | 667 | __ip6_dst_store(sk, dst, NULL, NULL); |
b9750ce1 ACM |
668 | } |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
673 | EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); | |
674 | ||
399c07de ACM |
675 | int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb) |
676 | { | |
677 | struct ipv6_pinfo *np = inet6_sk(sk); | |
678 | struct inet6_skb_parm *opt = IP6CB(skb); | |
679 | ||
680 | if (np->rxopt.all) { | |
681 | if ((opt->hop && (np->rxopt.bits.hopopts || | |
682 | np->rxopt.bits.ohopopts)) || | |
d56f90a7 ACM |
683 | ((IPV6_FLOWINFO_MASK & |
684 | *(__be32 *)skb_network_header(skb)) && | |
399c07de ACM |
685 | np->rxopt.bits.rxflow) || |
686 | (opt->srcrt && (np->rxopt.bits.srcrt || | |
687 | np->rxopt.bits.osrcrt)) || | |
688 | ((opt->dst1 || opt->dst0) && | |
689 | (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) | |
690 | return 1; | |
691 | } | |
692 | return 0; | |
693 | } | |
694 | ||
695 | EXPORT_SYMBOL_GPL(ipv6_opt_accepted); | |
696 | ||
787e9208 | 697 | static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto) |
662397fd YH |
698 | { |
699 | struct inet6_protocol *ops = NULL; | |
700 | ||
701 | for (;;) { | |
702 | struct ipv6_opt_hdr *opth; | |
703 | int len; | |
704 | ||
705 | if (proto != NEXTHDR_HOP) { | |
706 | ops = rcu_dereference(inet6_protos[proto]); | |
707 | ||
708 | if (unlikely(!ops)) | |
709 | break; | |
710 | ||
711 | if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) | |
712 | break; | |
713 | } | |
714 | ||
715 | if (unlikely(!pskb_may_pull(skb, 8))) | |
716 | break; | |
717 | ||
718 | opth = (void *)skb->data; | |
719 | len = ipv6_optlen(opth); | |
720 | ||
721 | if (unlikely(!pskb_may_pull(skb, len))) | |
722 | break; | |
723 | ||
724 | proto = opth->nexthdr; | |
725 | __skb_pull(skb, len); | |
726 | } | |
727 | ||
787e9208 | 728 | return proto; |
662397fd YH |
729 | } |
730 | ||
731 | static int ipv6_gso_send_check(struct sk_buff *skb) | |
732 | { | |
733 | struct ipv6hdr *ipv6h; | |
734 | struct inet6_protocol *ops; | |
735 | int err = -EINVAL; | |
736 | ||
737 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
738 | goto out; | |
739 | ||
740 | ipv6h = ipv6_hdr(skb); | |
741 | __skb_pull(skb, sizeof(*ipv6h)); | |
742 | err = -EPROTONOSUPPORT; | |
743 | ||
744 | rcu_read_lock(); | |
787e9208 HX |
745 | ops = rcu_dereference(inet6_protos[ |
746 | ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); | |
747 | ||
662397fd YH |
748 | if (likely(ops && ops->gso_send_check)) { |
749 | skb_reset_transport_header(skb); | |
750 | err = ops->gso_send_check(skb); | |
751 | } | |
752 | rcu_read_unlock(); | |
753 | ||
754 | out: | |
755 | return err; | |
756 | } | |
757 | ||
758 | static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features) | |
759 | { | |
760 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
761 | struct ipv6hdr *ipv6h; | |
762 | struct inet6_protocol *ops; | |
763 | ||
764 | if (!(features & NETIF_F_V6_CSUM)) | |
765 | features &= ~NETIF_F_SG; | |
766 | ||
767 | if (unlikely(skb_shinfo(skb)->gso_type & | |
768 | ~(SKB_GSO_UDP | | |
769 | SKB_GSO_DODGY | | |
770 | SKB_GSO_TCP_ECN | | |
771 | SKB_GSO_TCPV6 | | |
772 | 0))) | |
773 | goto out; | |
774 | ||
775 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
776 | goto out; | |
777 | ||
778 | ipv6h = ipv6_hdr(skb); | |
779 | __skb_pull(skb, sizeof(*ipv6h)); | |
780 | segs = ERR_PTR(-EPROTONOSUPPORT); | |
781 | ||
782 | rcu_read_lock(); | |
787e9208 HX |
783 | ops = rcu_dereference(inet6_protos[ |
784 | ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); | |
785 | ||
662397fd YH |
786 | if (likely(ops && ops->gso_segment)) { |
787 | skb_reset_transport_header(skb); | |
788 | segs = ops->gso_segment(skb, features); | |
789 | } | |
790 | rcu_read_unlock(); | |
791 | ||
792 | if (unlikely(IS_ERR(segs))) | |
793 | goto out; | |
794 | ||
795 | for (skb = segs; skb; skb = skb->next) { | |
796 | ipv6h = ipv6_hdr(skb); | |
797 | ipv6h->payload_len = htons(skb->len - skb->mac_len - | |
798 | sizeof(*ipv6h)); | |
799 | } | |
800 | ||
801 | out: | |
802 | return segs; | |
803 | } | |
804 | ||
787e9208 HX |
805 | struct ipv6_gro_cb { |
806 | struct napi_gro_cb napi; | |
807 | int proto; | |
808 | }; | |
809 | ||
810 | #define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb) | |
811 | ||
812 | static struct sk_buff **ipv6_gro_receive(struct sk_buff **head, | |
813 | struct sk_buff *skb) | |
814 | { | |
815 | struct inet6_protocol *ops; | |
816 | struct sk_buff **pp = NULL; | |
817 | struct sk_buff *p; | |
818 | struct ipv6hdr *iph; | |
819 | unsigned int nlen; | |
820 | int flush = 1; | |
821 | int proto; | |
ebad18e9 | 822 | __wsum csum; |
787e9208 | 823 | |
86911732 HX |
824 | iph = skb_gro_header(skb, sizeof(*iph)); |
825 | if (unlikely(!iph)) | |
787e9208 HX |
826 | goto out; |
827 | ||
86911732 HX |
828 | skb_gro_pull(skb, sizeof(*iph)); |
829 | skb_set_transport_header(skb, skb_gro_offset(skb)); | |
787e9208 | 830 | |
86911732 | 831 | flush += ntohs(iph->payload_len) != skb_gro_len(skb); |
787e9208 HX |
832 | |
833 | rcu_read_lock(); | |
86911732 | 834 | proto = iph->nexthdr; |
787e9208 | 835 | ops = rcu_dereference(inet6_protos[proto]); |
86911732 HX |
836 | if (!ops || !ops->gro_receive) { |
837 | __pskb_pull(skb, skb_gro_offset(skb)); | |
838 | proto = ipv6_gso_pull_exthdrs(skb, proto); | |
839 | skb_gro_pull(skb, -skb_transport_offset(skb)); | |
840 | skb_reset_transport_header(skb); | |
841 | __skb_push(skb, skb_gro_offset(skb)); | |
842 | ||
843 | if (!ops || !ops->gro_receive) | |
844 | goto out_unlock; | |
845 | ||
846 | iph = ipv6_hdr(skb); | |
847 | } | |
848 | ||
849 | IPV6_GRO_CB(skb)->proto = proto; | |
787e9208 HX |
850 | |
851 | flush--; | |
787e9208 HX |
852 | nlen = skb_network_header_len(skb); |
853 | ||
854 | for (p = *head; p; p = p->next) { | |
855 | struct ipv6hdr *iph2; | |
856 | ||
857 | if (!NAPI_GRO_CB(p)->same_flow) | |
858 | continue; | |
859 | ||
860 | iph2 = ipv6_hdr(p); | |
861 | ||
862 | /* All fields must match except length. */ | |
863 | if (nlen != skb_network_header_len(p) || | |
864 | memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) || | |
865 | memcmp(&iph->nexthdr, &iph2->nexthdr, | |
866 | nlen - offsetof(struct ipv6hdr, nexthdr))) { | |
867 | NAPI_GRO_CB(p)->same_flow = 0; | |
868 | continue; | |
869 | } | |
870 | ||
871 | NAPI_GRO_CB(p)->flush |= flush; | |
872 | } | |
873 | ||
874 | NAPI_GRO_CB(skb)->flush |= flush; | |
875 | ||
ebad18e9 HX |
876 | csum = skb->csum; |
877 | skb_postpull_rcsum(skb, iph, skb_network_header_len(skb)); | |
878 | ||
787e9208 HX |
879 | pp = ops->gro_receive(head, skb); |
880 | ||
ebad18e9 HX |
881 | skb->csum = csum; |
882 | ||
787e9208 HX |
883 | out_unlock: |
884 | rcu_read_unlock(); | |
885 | ||
886 | out: | |
887 | NAPI_GRO_CB(skb)->flush |= flush; | |
888 | ||
889 | return pp; | |
890 | } | |
891 | ||
892 | static int ipv6_gro_complete(struct sk_buff *skb) | |
893 | { | |
894 | struct inet6_protocol *ops; | |
895 | struct ipv6hdr *iph = ipv6_hdr(skb); | |
896 | int err = -ENOSYS; | |
897 | ||
898 | iph->payload_len = htons(skb->len - skb_network_offset(skb) - | |
899 | sizeof(*iph)); | |
900 | ||
901 | rcu_read_lock(); | |
902 | ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]); | |
903 | if (WARN_ON(!ops || !ops->gro_complete)) | |
904 | goto out_unlock; | |
905 | ||
906 | err = ops->gro_complete(skb); | |
907 | ||
908 | out_unlock: | |
909 | rcu_read_unlock(); | |
910 | ||
911 | return err; | |
912 | } | |
913 | ||
7546dd97 | 914 | static struct packet_type ipv6_packet_type __read_mostly = { |
09640e63 | 915 | .type = cpu_to_be16(ETH_P_IPV6), |
662397fd YH |
916 | .func = ipv6_rcv, |
917 | .gso_send_check = ipv6_gso_send_check, | |
918 | .gso_segment = ipv6_gso_segment, | |
787e9208 HX |
919 | .gro_receive = ipv6_gro_receive, |
920 | .gro_complete = ipv6_gro_complete, | |
662397fd YH |
921 | }; |
922 | ||
923 | static int __init ipv6_packet_init(void) | |
924 | { | |
925 | dev_add_pack(&ipv6_packet_type); | |
926 | return 0; | |
927 | } | |
928 | ||
929 | static void ipv6_packet_cleanup(void) | |
930 | { | |
931 | dev_remove_pack(&ipv6_packet_type); | |
932 | } | |
933 | ||
e43291cb DL |
934 | static int __net_init ipv6_init_mibs(struct net *net) |
935 | { | |
0c7ed677 DL |
936 | if (snmp_mib_init((void **)net->mib.udp_stats_in6, |
937 | sizeof (struct udp_mib)) < 0) | |
938 | return -ENOMEM; | |
be713a44 DL |
939 | if (snmp_mib_init((void **)net->mib.udplite_stats_in6, |
940 | sizeof (struct udp_mib)) < 0) | |
941 | goto err_udplite_mib; | |
9261e537 DL |
942 | if (snmp_mib_init((void **)net->mib.ipv6_statistics, |
943 | sizeof(struct ipstats_mib)) < 0) | |
944 | goto err_ip_mib; | |
945 | if (snmp_mib_init((void **)net->mib.icmpv6_statistics, | |
946 | sizeof(struct icmpv6_mib)) < 0) | |
947 | goto err_icmp_mib; | |
948 | if (snmp_mib_init((void **)net->mib.icmpv6msg_statistics, | |
949 | sizeof(struct icmpv6msg_mib)) < 0) | |
950 | goto err_icmpmsg_mib; | |
e43291cb | 951 | return 0; |
be713a44 | 952 | |
9261e537 DL |
953 | err_icmpmsg_mib: |
954 | snmp_mib_free((void **)net->mib.icmpv6_statistics); | |
955 | err_icmp_mib: | |
956 | snmp_mib_free((void **)net->mib.ipv6_statistics); | |
957 | err_ip_mib: | |
958 | snmp_mib_free((void **)net->mib.udplite_stats_in6); | |
be713a44 DL |
959 | err_udplite_mib: |
960 | snmp_mib_free((void **)net->mib.udp_stats_in6); | |
961 | return -ENOMEM; | |
e43291cb DL |
962 | } |
963 | ||
964 | static void __net_exit ipv6_cleanup_mibs(struct net *net) | |
965 | { | |
0c7ed677 | 966 | snmp_mib_free((void **)net->mib.udp_stats_in6); |
be713a44 | 967 | snmp_mib_free((void **)net->mib.udplite_stats_in6); |
9261e537 DL |
968 | snmp_mib_free((void **)net->mib.ipv6_statistics); |
969 | snmp_mib_free((void **)net->mib.icmpv6_statistics); | |
970 | snmp_mib_free((void **)net->mib.icmpv6msg_statistics); | |
e43291cb DL |
971 | } |
972 | ||
e7dc8494 | 973 | static int __net_init inet6_net_init(struct net *net) |
81c1c178 | 974 | { |
0c96d8c5 DL |
975 | int err = 0; |
976 | ||
99bc9c4e | 977 | net->ipv6.sysctl.bindv6only = 0; |
41a76906 | 978 | net->ipv6.sysctl.icmpv6_time = 1*HZ; |
e71e0349 | 979 | |
e43291cb DL |
980 | err = ipv6_init_mibs(net); |
981 | if (err) | |
982 | return err; | |
0c96d8c5 DL |
983 | #ifdef CONFIG_PROC_FS |
984 | err = udp6_proc_init(net); | |
985 | if (err) | |
986 | goto out; | |
6f8b13bc DL |
987 | err = tcp6_proc_init(net); |
988 | if (err) | |
989 | goto proc_tcp6_fail; | |
6ab57e7e DL |
990 | err = ac6_proc_init(net); |
991 | if (err) | |
992 | goto proc_ac6_fail; | |
0c96d8c5 DL |
993 | #endif |
994 | return err; | |
6f8b13bc DL |
995 | |
996 | #ifdef CONFIG_PROC_FS | |
6ab57e7e DL |
997 | proc_ac6_fail: |
998 | tcp6_proc_exit(net); | |
6f8b13bc DL |
999 | proc_tcp6_fail: |
1000 | udp6_proc_exit(net); | |
e43291cb DL |
1001 | out: |
1002 | ipv6_cleanup_mibs(net); | |
1003 | return err; | |
6f8b13bc | 1004 | #endif |
81c1c178 DL |
1005 | } |
1006 | ||
1007 | static void inet6_net_exit(struct net *net) | |
1008 | { | |
0c96d8c5 DL |
1009 | #ifdef CONFIG_PROC_FS |
1010 | udp6_proc_exit(net); | |
6f8b13bc | 1011 | tcp6_proc_exit(net); |
6ab57e7e | 1012 | ac6_proc_exit(net); |
0c96d8c5 | 1013 | #endif |
e43291cb | 1014 | ipv6_cleanup_mibs(net); |
81c1c178 DL |
1015 | } |
1016 | ||
1017 | static struct pernet_operations inet6_net_ops = { | |
1018 | .init = inet6_net_init, | |
1019 | .exit = inet6_net_exit, | |
1020 | }; | |
1021 | ||
1da177e4 LT |
1022 | static int __init inet6_init(void) |
1023 | { | |
1024 | struct sk_buff *dummy_skb; | |
1ab1457c | 1025 | struct list_head *r; |
fe7ca2e1 | 1026 | int err = 0; |
1da177e4 | 1027 | |
ef047f5e YH |
1028 | BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)); |
1029 | ||
fe7ca2e1 BH |
1030 | /* Register the socket-side information for inet6_create. */ |
1031 | for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) | |
1032 | INIT_LIST_HEAD(r); | |
1033 | ||
1034 | if (disable_ipv6) { | |
1035 | printk(KERN_INFO | |
1036 | "IPv6: Loaded, but administratively disabled, " | |
1037 | "reboot required to enable\n"); | |
1038 | goto out; | |
1039 | } | |
1040 | ||
1da177e4 LT |
1041 | err = proto_register(&tcpv6_prot, 1); |
1042 | if (err) | |
1043 | goto out; | |
1044 | ||
1045 | err = proto_register(&udpv6_prot, 1); | |
1046 | if (err) | |
1047 | goto out_unregister_tcp_proto; | |
1048 | ||
ba4e58ec | 1049 | err = proto_register(&udplitev6_prot, 1); |
1da177e4 LT |
1050 | if (err) |
1051 | goto out_unregister_udp_proto; | |
1052 | ||
ba4e58ec GR |
1053 | err = proto_register(&rawv6_prot, 1); |
1054 | if (err) | |
1055 | goto out_unregister_udplite_proto; | |
1056 | ||
1da177e4 | 1057 | |
1da177e4 LT |
1058 | /* We MUST register RAW sockets before we create the ICMP6, |
1059 | * IGMP6, or NDISC control sockets. | |
1060 | */ | |
7f4e4868 DL |
1061 | err = rawv6_init(); |
1062 | if (err) | |
1063 | goto out_unregister_raw_proto; | |
1da177e4 LT |
1064 | |
1065 | /* Register the family here so that the init calls below will | |
1066 | * be able to create sockets. (?? is this dangerous ??) | |
1067 | */ | |
8eb55910 DM |
1068 | err = sock_register(&inet6_family_ops); |
1069 | if (err) | |
7f4e4868 | 1070 | goto out_sock_register_fail; |
1da177e4 | 1071 | |
eeb61f71 AV |
1072 | #ifdef CONFIG_SYSCTL |
1073 | err = ipv6_static_sysctl_register(); | |
1074 | if (err) | |
1075 | goto static_sysctl_fail; | |
1076 | #endif | |
1da177e4 LT |
1077 | /* |
1078 | * ipngwg API draft makes clear that the correct semantics | |
1079 | * for TCP and UDP is to consider one TCP and UDP instance | |
1080 | * in a host availiable by both INET and INET6 APIs and | |
1081 | * able to communicate via both network protocols. | |
1082 | */ | |
1083 | ||
81c1c178 DL |
1084 | err = register_pernet_subsys(&inet6_net_ops); |
1085 | if (err) | |
1086 | goto register_pernet_fail; | |
9b0f976f | 1087 | err = icmpv6_init(); |
1da177e4 LT |
1088 | if (err) |
1089 | goto icmp_fail; | |
623d1a1a WC |
1090 | err = ip6_mr_init(); |
1091 | if (err) | |
1092 | goto ipmr_fail; | |
9b0f976f | 1093 | err = ndisc_init(); |
1da177e4 LT |
1094 | if (err) |
1095 | goto ndisc_fail; | |
9b0f976f | 1096 | err = igmp6_init(); |
1da177e4 LT |
1097 | if (err) |
1098 | goto igmp_fail; | |
2cc7d573 HW |
1099 | err = ipv6_netfilter_init(); |
1100 | if (err) | |
1101 | goto netfilter_fail; | |
1da177e4 LT |
1102 | /* Create /proc/foo6 entries. */ |
1103 | #ifdef CONFIG_PROC_FS | |
1104 | err = -ENOMEM; | |
1105 | if (raw6_proc_init()) | |
1106 | goto proc_raw6_fail; | |
ba4e58ec GR |
1107 | if (udplite6_proc_init()) |
1108 | goto proc_udplite6_fail; | |
1da177e4 LT |
1109 | if (ipv6_misc_proc_init()) |
1110 | goto proc_misc6_fail; | |
1da177e4 LT |
1111 | if (if6_proc_init()) |
1112 | goto proc_if6_fail; | |
1113 | #endif | |
e2fddf5e DL |
1114 | err = ip6_route_init(); |
1115 | if (err) | |
1116 | goto ip6_route_fail; | |
0a3e78ac DL |
1117 | err = ip6_flowlabel_init(); |
1118 | if (err) | |
1119 | goto ip6_flowlabel_fail; | |
1da177e4 LT |
1120 | err = addrconf_init(); |
1121 | if (err) | |
1122 | goto addrconf_fail; | |
1da177e4 LT |
1123 | |
1124 | /* Init v6 extension headers. */ | |
248b238d DL |
1125 | err = ipv6_exthdrs_init(); |
1126 | if (err) | |
1127 | goto ipv6_exthdrs_fail; | |
1128 | ||
853cbbaa DL |
1129 | err = ipv6_frag_init(); |
1130 | if (err) | |
1131 | goto ipv6_frag_fail; | |
1da177e4 LT |
1132 | |
1133 | /* Init v6 transport protocols. */ | |
7f4e4868 DL |
1134 | err = udpv6_init(); |
1135 | if (err) | |
1136 | goto udpv6_fail; | |
e2ed4052 | 1137 | |
7f4e4868 DL |
1138 | err = udplitev6_init(); |
1139 | if (err) | |
1140 | goto udplitev6_fail; | |
1141 | ||
1142 | err = tcpv6_init(); | |
1143 | if (err) | |
1144 | goto tcpv6_fail; | |
1145 | ||
1146 | err = ipv6_packet_init(); | |
1147 | if (err) | |
1148 | goto ipv6_packet_fail; | |
94911fe3 BT |
1149 | |
1150 | #ifdef CONFIG_SYSCTL | |
1151 | err = ipv6_sysctl_register(); | |
1152 | if (err) | |
1153 | goto sysctl_fail; | |
1154 | #endif | |
1da177e4 LT |
1155 | out: |
1156 | return err; | |
1157 | ||
94911fe3 BT |
1158 | #ifdef CONFIG_SYSCTL |
1159 | sysctl_fail: | |
1160 | ipv6_packet_cleanup(); | |
1161 | #endif | |
7f4e4868 DL |
1162 | ipv6_packet_fail: |
1163 | tcpv6_exit(); | |
1164 | tcpv6_fail: | |
1165 | udplitev6_exit(); | |
1166 | udplitev6_fail: | |
1167 | udpv6_exit(); | |
1168 | udpv6_fail: | |
1169 | ipv6_frag_exit(); | |
853cbbaa DL |
1170 | ipv6_frag_fail: |
1171 | ipv6_exthdrs_exit(); | |
248b238d DL |
1172 | ipv6_exthdrs_fail: |
1173 | addrconf_cleanup(); | |
1da177e4 LT |
1174 | addrconf_fail: |
1175 | ip6_flowlabel_cleanup(); | |
0a3e78ac | 1176 | ip6_flowlabel_fail: |
1da177e4 | 1177 | ip6_route_cleanup(); |
e2fddf5e | 1178 | ip6_route_fail: |
1da177e4 LT |
1179 | #ifdef CONFIG_PROC_FS |
1180 | if6_proc_exit(); | |
1181 | proc_if6_fail: | |
1da177e4 LT |
1182 | ipv6_misc_proc_exit(); |
1183 | proc_misc6_fail: | |
ba4e58ec GR |
1184 | udplite6_proc_exit(); |
1185 | proc_udplite6_fail: | |
1da177e4 LT |
1186 | raw6_proc_exit(); |
1187 | proc_raw6_fail: | |
1188 | #endif | |
2cc7d573 HW |
1189 | ipv6_netfilter_fini(); |
1190 | netfilter_fail: | |
1da177e4 LT |
1191 | igmp6_cleanup(); |
1192 | igmp_fail: | |
1193 | ndisc_cleanup(); | |
1194 | ndisc_fail: | |
623d1a1a WC |
1195 | ip6_mr_cleanup(); |
1196 | ipmr_fail: | |
1da177e4 LT |
1197 | icmpv6_cleanup(); |
1198 | icmp_fail: | |
81c1c178 DL |
1199 | unregister_pernet_subsys(&inet6_net_ops); |
1200 | register_pernet_fail: | |
eeb61f71 AV |
1201 | #ifdef CONFIG_SYSCTL |
1202 | ipv6_static_sysctl_unregister(); | |
1203 | static_sysctl_fail: | |
1204 | #endif | |
8eb55910 | 1205 | sock_unregister(PF_INET6); |
e2fddf5e | 1206 | rtnl_unregister_all(PF_INET6); |
7f4e4868 DL |
1207 | out_sock_register_fail: |
1208 | rawv6_exit(); | |
1da177e4 LT |
1209 | out_unregister_raw_proto: |
1210 | proto_unregister(&rawv6_prot); | |
ba4e58ec GR |
1211 | out_unregister_udplite_proto: |
1212 | proto_unregister(&udplitev6_prot); | |
1da177e4 LT |
1213 | out_unregister_udp_proto: |
1214 | proto_unregister(&udpv6_prot); | |
1215 | out_unregister_tcp_proto: | |
1216 | proto_unregister(&tcpv6_prot); | |
1217 | goto out; | |
1218 | } | |
1219 | module_init(inet6_init); | |
1220 | ||
1221 | static void __exit inet6_exit(void) | |
1222 | { | |
ff8cf9a9 JD |
1223 | if (disable_ipv6) |
1224 | return; | |
1225 | ||
1da177e4 LT |
1226 | /* First of all disallow new sockets creation. */ |
1227 | sock_unregister(PF_INET6); | |
c127ea2c TG |
1228 | /* Disallow any further netlink messages */ |
1229 | rtnl_unregister_all(PF_INET6); | |
ca17c233 | 1230 | |
94911fe3 BT |
1231 | #ifdef CONFIG_SYSCTL |
1232 | ipv6_sysctl_unregister(); | |
1233 | #endif | |
7f4e4868 DL |
1234 | udpv6_exit(); |
1235 | udplitev6_exit(); | |
1236 | tcpv6_exit(); | |
1237 | ||
ca17c233 JJ |
1238 | /* Cleanup code parts. */ |
1239 | ipv6_packet_cleanup(); | |
853cbbaa | 1240 | ipv6_frag_exit(); |
248b238d | 1241 | ipv6_exthdrs_exit(); |
ca17c233 JJ |
1242 | addrconf_cleanup(); |
1243 | ip6_flowlabel_cleanup(); | |
1244 | ip6_route_cleanup(); | |
1da177e4 | 1245 | #ifdef CONFIG_PROC_FS |
ca17c233 JJ |
1246 | |
1247 | /* Cleanup code parts. */ | |
1da177e4 | 1248 | if6_proc_exit(); |
1ab1457c | 1249 | ipv6_misc_proc_exit(); |
1ab1457c | 1250 | udplite6_proc_exit(); |
1ab1457c | 1251 | raw6_proc_exit(); |
2c8d7ca0 | 1252 | #endif |
2cc7d573 | 1253 | ipv6_netfilter_fini(); |
ca17c233 | 1254 | igmp6_cleanup(); |
1da177e4 | 1255 | ndisc_cleanup(); |
623d1a1a | 1256 | ip6_mr_cleanup(); |
1da177e4 | 1257 | icmpv6_cleanup(); |
7f4e4868 | 1258 | rawv6_exit(); |
94911fe3 | 1259 | |
81c1c178 | 1260 | unregister_pernet_subsys(&inet6_net_ops); |
eeb61f71 AV |
1261 | #ifdef CONFIG_SYSCTL |
1262 | ipv6_static_sysctl_unregister(); | |
1263 | #endif | |
1da177e4 | 1264 | proto_unregister(&rawv6_prot); |
ca17c233 | 1265 | proto_unregister(&udplitev6_prot); |
1da177e4 LT |
1266 | proto_unregister(&udpv6_prot); |
1267 | proto_unregister(&tcpv6_prot); | |
1268 | } | |
1269 | module_exit(inet6_exit); | |
1270 | ||
1271 | MODULE_ALIAS_NETPROTO(PF_INET6); |