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> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 LT |
40 | |
41 | #include <linux/inet.h> | |
42 | #include <linux/netdevice.h> | |
43 | #include <linux/icmpv6.h> | |
2cc7d573 | 44 | #include <linux/netfilter_ipv6.h> |
1da177e4 LT |
45 | |
46 | #include <net/ip.h> | |
47 | #include <net/ipv6.h> | |
48 | #include <net/udp.h> | |
ba4e58ec | 49 | #include <net/udplite.h> |
1da177e4 LT |
50 | #include <net/tcp.h> |
51 | #include <net/ipip.h> | |
52 | #include <net/protocol.h> | |
53 | #include <net/inet_common.h> | |
1668e010 | 54 | #include <net/route.h> |
1da177e4 LT |
55 | #include <net/transp_v6.h> |
56 | #include <net/ip6_route.h> | |
57 | #include <net/addrconf.h> | |
58 | #ifdef CONFIG_IPV6_TUNNEL | |
59 | #include <net/ip6_tunnel.h> | |
60 | #endif | |
61 | ||
62 | #include <asm/uaccess.h> | |
63 | #include <asm/system.h> | |
7bc570c8 | 64 | #include <linux/mroute6.h> |
1da177e4 LT |
65 | |
66 | MODULE_AUTHOR("Cast of dozens"); | |
67 | MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); | |
68 | MODULE_LICENSE("GPL"); | |
69 | ||
f1267347 | 70 | /* The inetsw6 table contains everything that inet6_create needs to |
1da177e4 LT |
71 | * build a new socket. |
72 | */ | |
73 | static struct list_head inetsw6[SOCK_MAX]; | |
74 | static DEFINE_SPINLOCK(inetsw6_lock); | |
75 | ||
56d417b1 BH |
76 | struct ipv6_params ipv6_defaults = { |
77 | .disable_ipv6 = 0, | |
78 | .autoconf = 1, | |
79 | }; | |
80 | ||
81 | static int disable_ipv6_mod = 0; | |
82 | ||
83 | module_param_named(disable, disable_ipv6_mod, int, 0444); | |
84 | MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional"); | |
85 | ||
86 | module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444); | |
87 | MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces"); | |
88 | ||
89 | module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444); | |
90 | MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces"); | |
fe7ca2e1 | 91 | |
1da177e4 LT |
92 | static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) |
93 | { | |
94 | const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); | |
95 | ||
96 | return (struct ipv6_pinfo *)(((u8 *)sk) + offset); | |
97 | } | |
98 | ||
3f378b68 EP |
99 | static int inet6_create(struct net *net, struct socket *sock, int protocol, |
100 | int kern) | |
1da177e4 LT |
101 | { |
102 | struct inet_sock *inet; | |
103 | struct ipv6_pinfo *np; | |
104 | struct sock *sk; | |
1da177e4 LT |
105 | struct inet_protosw *answer; |
106 | struct proto *answer_prot; | |
107 | unsigned char answer_flags; | |
108 | char answer_no_check; | |
af1afe86 YH |
109 | int try_loading_module = 0; |
110 | int err; | |
1da177e4 | 111 | |
b3da2cf3 DM |
112 | if (sock->type != SOCK_RAW && |
113 | sock->type != SOCK_DGRAM && | |
114 | !inet_ehash_secret) | |
115 | build_ehash_secret(); | |
116 | ||
1da177e4 | 117 | /* Look for the requested type/protocol pair. */ |
af1afe86 YH |
118 | lookup_protocol: |
119 | err = -ESOCKTNOSUPPORT; | |
1da177e4 | 120 | rcu_read_lock(); |
696adfe8 | 121 | list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { |
1da177e4 | 122 | |
696adfe8 | 123 | err = 0; |
1da177e4 LT |
124 | /* Check the non-wild match. */ |
125 | if (protocol == answer->protocol) { | |
126 | if (protocol != IPPROTO_IP) | |
127 | break; | |
128 | } else { | |
129 | /* Check for the two wild cases. */ | |
130 | if (IPPROTO_IP == protocol) { | |
131 | protocol = answer->protocol; | |
132 | break; | |
133 | } | |
134 | if (IPPROTO_IP == answer->protocol) | |
135 | break; | |
136 | } | |
af1afe86 | 137 | err = -EPROTONOSUPPORT; |
1da177e4 LT |
138 | } |
139 | ||
696adfe8 | 140 | if (err) { |
af1afe86 YH |
141 | if (try_loading_module < 2) { |
142 | rcu_read_unlock(); | |
143 | /* | |
144 | * Be more specific, e.g. net-pf-10-proto-132-type-1 | |
145 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) | |
146 | */ | |
147 | if (++try_loading_module == 1) | |
148 | request_module("net-pf-%d-proto-%d-type-%d", | |
149 | PF_INET6, protocol, sock->type); | |
150 | /* | |
151 | * Fall back to generic, e.g. net-pf-10-proto-132 | |
152 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP) | |
153 | */ | |
154 | else | |
155 | request_module("net-pf-%d-proto-%d", | |
156 | PF_INET6, protocol); | |
157 | goto lookup_protocol; | |
158 | } else | |
159 | goto out_rcu_unlock; | |
160 | } | |
161 | ||
162 | err = -EPERM; | |
c84b3268 | 163 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
1da177e4 | 164 | goto out_rcu_unlock; |
1da177e4 LT |
165 | |
166 | sock->ops = answer->ops; | |
1da177e4 LT |
167 | answer_prot = answer->prot; |
168 | answer_no_check = answer->no_check; | |
169 | answer_flags = answer->flags; | |
170 | rcu_read_unlock(); | |
171 | ||
547b792c | 172 | WARN_ON(answer_prot->slab == NULL); |
1da177e4 | 173 | |
af1afe86 | 174 | err = -ENOBUFS; |
6257ff21 | 175 | sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot); |
1da177e4 LT |
176 | if (sk == NULL) |
177 | goto out; | |
178 | ||
179 | sock_init_data(sock, sk); | |
180 | ||
af1afe86 | 181 | err = 0; |
1da177e4 LT |
182 | sk->sk_no_check = answer_no_check; |
183 | if (INET_PROTOSW_REUSE & answer_flags) | |
184 | sk->sk_reuse = 1; | |
185 | ||
186 | inet = inet_sk(sk); | |
469de9b9 | 187 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
1da177e4 LT |
188 | |
189 | if (SOCK_RAW == sock->type) { | |
c720c7e8 | 190 | inet->inet_num = protocol; |
1da177e4 LT |
191 | if (IPPROTO_RAW == protocol) |
192 | inet->hdrincl = 1; | |
193 | } | |
194 | ||
e6848976 | 195 | sk->sk_destruct = inet_sock_destruct; |
1da177e4 LT |
196 | sk->sk_family = PF_INET6; |
197 | sk->sk_protocol = protocol; | |
198 | ||
199 | sk->sk_backlog_rcv = answer->prot->backlog_rcv; | |
200 | ||
201 | inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); | |
202 | np->hop_limit = -1; | |
f935aa9e | 203 | np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; |
1da177e4 LT |
204 | np->mc_loop = 1; |
205 | np->pmtudisc = IPV6_PMTUDISC_WANT; | |
2e761e05 | 206 | np->ipv6only = net->ipv6.sysctl.bindv6only; |
1ab1457c | 207 | |
1da177e4 LT |
208 | /* Init the ipv4 part of the socket since we can have sockets |
209 | * using v6 API for ipv4. | |
210 | */ | |
211 | inet->uc_ttl = -1; | |
212 | ||
213 | inet->mc_loop = 1; | |
214 | inet->mc_ttl = 1; | |
215 | inet->mc_index = 0; | |
216 | inet->mc_list = NULL; | |
4c507d28 | 217 | inet->rcv_tos = 0; |
1da177e4 LT |
218 | |
219 | if (ipv4_config.no_pmtu_disc) | |
220 | inet->pmtudisc = IP_PMTUDISC_DONT; | |
221 | else | |
222 | inet->pmtudisc = IP_PMTUDISC_WANT; | |
1ab1457c | 223 | /* |
e6848976 ACM |
224 | * Increment only the relevant sk_prot->socks debug field, this changes |
225 | * the previous behaviour of incrementing both the equivalent to | |
226 | * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. | |
227 | * | |
228 | * This allows better debug granularity as we'll know exactly how many | |
229 | * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 | |
230 | * transport protocol socks. -acme | |
231 | */ | |
232 | sk_refcnt_debug_inc(sk); | |
1da177e4 | 233 | |
c720c7e8 | 234 | if (inet->inet_num) { |
1da177e4 LT |
235 | /* It assumes that any protocol which allows |
236 | * the user to assign a number at socket | |
237 | * creation time automatically shares. | |
238 | */ | |
c720c7e8 | 239 | inet->inet_sport = htons(inet->inet_num); |
1da177e4 LT |
240 | sk->sk_prot->hash(sk); |
241 | } | |
242 | if (sk->sk_prot->init) { | |
af1afe86 YH |
243 | err = sk->sk_prot->init(sk); |
244 | if (err) { | |
1da177e4 LT |
245 | sk_common_release(sk); |
246 | goto out; | |
247 | } | |
248 | } | |
249 | out: | |
af1afe86 | 250 | return err; |
1da177e4 LT |
251 | out_rcu_unlock: |
252 | rcu_read_unlock(); | |
253 | goto out; | |
254 | } | |
255 | ||
256 | ||
257 | /* bind for INET6 API */ | |
258 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
259 | { | |
260 | struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr; | |
261 | struct sock *sk = sock->sk; | |
262 | struct inet_sock *inet = inet_sk(sk); | |
263 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 264 | struct net *net = sock_net(sk); |
fd683222 | 265 | __be32 v4addr = 0; |
1da177e4 LT |
266 | unsigned short snum; |
267 | int addr_type = 0; | |
268 | int err = 0; | |
269 | ||
270 | /* If the socket has its own bind function then use it. */ | |
271 | if (sk->sk_prot->bind) | |
272 | return sk->sk_prot->bind(sk, uaddr, addr_len); | |
273 | ||
274 | if (addr_len < SIN6_LEN_RFC2133) | |
275 | return -EINVAL; | |
5a079c30 MM |
276 | |
277 | if (addr->sin6_family != AF_INET6) | |
c349a528 | 278 | return -EAFNOSUPPORT; |
5a079c30 | 279 | |
1da177e4 LT |
280 | addr_type = ipv6_addr_type(&addr->sin6_addr); |
281 | if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) | |
282 | return -EINVAL; | |
283 | ||
284 | snum = ntohs(addr->sin6_port); | |
285 | if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
286 | return -EACCES; | |
287 | ||
288 | lock_sock(sk); | |
289 | ||
290 | /* Check these errors (active socket, double bind). */ | |
c720c7e8 | 291 | if (sk->sk_state != TCP_CLOSE || inet->inet_num) { |
1da177e4 LT |
292 | err = -EINVAL; |
293 | goto out; | |
294 | } | |
295 | ||
296 | /* Check if the address belongs to the host. */ | |
297 | if (addr_type == IPV6_ADDR_MAPPED) { | |
63d9950b VY |
298 | int chk_addr_ret; |
299 | ||
783ed5a7 VY |
300 | /* Binding to v4-mapped address on a v6-only socket |
301 | * makes no sense | |
302 | */ | |
303 | if (np->ipv6only) { | |
304 | err = -EINVAL; | |
305 | goto out; | |
306 | } | |
63d9950b | 307 | |
a34f0b31 | 308 | /* Reproduce AF_INET checks to make the bindings consistent */ |
1da177e4 | 309 | v4addr = addr->sin6_addr.s6_addr32[3]; |
63d9950b VY |
310 | chk_addr_ret = inet_addr_type(net, v4addr); |
311 | if (!sysctl_ip_nonlocal_bind && | |
312 | !(inet->freebind || inet->transparent) && | |
313 | v4addr != htonl(INADDR_ANY) && | |
314 | chk_addr_ret != RTN_LOCAL && | |
315 | chk_addr_ret != RTN_MULTICAST && | |
ca6982b8 BP |
316 | chk_addr_ret != RTN_BROADCAST) { |
317 | err = -EADDRNOTAVAIL; | |
1da177e4 | 318 | goto out; |
ca6982b8 | 319 | } |
1da177e4 LT |
320 | } else { |
321 | if (addr_type != IPV6_ADDR_ANY) { | |
322 | struct net_device *dev = NULL; | |
323 | ||
16ba5e8e | 324 | rcu_read_lock(); |
1da177e4 LT |
325 | if (addr_type & IPV6_ADDR_LINKLOCAL) { |
326 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
327 | addr->sin6_scope_id) { | |
328 | /* Override any existing binding, if another one | |
329 | * is supplied by user. | |
330 | */ | |
331 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
332 | } | |
1ab1457c | 333 | |
1da177e4 LT |
334 | /* Binding to link-local address requires an interface */ |
335 | if (!sk->sk_bound_dev_if) { | |
336 | err = -EINVAL; | |
16ba5e8e | 337 | goto out_unlock; |
1da177e4 | 338 | } |
16ba5e8e | 339 | dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); |
1da177e4 LT |
340 | if (!dev) { |
341 | err = -ENODEV; | |
16ba5e8e | 342 | goto out_unlock; |
1da177e4 LT |
343 | } |
344 | } | |
345 | ||
346 | /* ipv4 addr of the socket is invalid. Only the | |
347 | * unspecified and mapped address have a v4 equivalent. | |
348 | */ | |
349 | v4addr = LOOPBACK4_IPV6; | |
350 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
f74024d9 | 351 | if (!(inet->freebind || inet->transparent) && |
0a513f6a | 352 | !ipv6_chk_addr(net, &addr->sin6_addr, |
bfeade08 | 353 | dev, 0)) { |
1da177e4 | 354 | err = -EADDRNOTAVAIL; |
16ba5e8e | 355 | goto out_unlock; |
1da177e4 LT |
356 | } |
357 | } | |
16ba5e8e | 358 | rcu_read_unlock(); |
1da177e4 LT |
359 | } |
360 | } | |
361 | ||
c720c7e8 ED |
362 | inet->inet_rcv_saddr = v4addr; |
363 | inet->inet_saddr = v4addr; | |
1da177e4 | 364 | |
4e3fd7a0 | 365 | np->rcv_saddr = addr->sin6_addr; |
1ab1457c | 366 | |
1da177e4 | 367 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
4e3fd7a0 | 368 | np->saddr = addr->sin6_addr; |
1da177e4 LT |
369 | |
370 | /* Make sure we are allowed to bind here. */ | |
371 | if (sk->sk_prot->get_port(sk, snum)) { | |
372 | inet_reset_saddr(sk); | |
373 | err = -EADDRINUSE; | |
374 | goto out; | |
375 | } | |
376 | ||
0f8d3c7a | 377 | if (addr_type != IPV6_ADDR_ANY) { |
1da177e4 | 378 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
0f8d3c7a VY |
379 | if (addr_type != IPV6_ADDR_MAPPED) |
380 | np->ipv6only = 1; | |
381 | } | |
1da177e4 LT |
382 | if (snum) |
383 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
c720c7e8 ED |
384 | inet->inet_sport = htons(inet->inet_num); |
385 | inet->inet_dport = 0; | |
386 | inet->inet_daddr = 0; | |
1da177e4 LT |
387 | out: |
388 | release_sock(sk); | |
389 | return err; | |
16ba5e8e ED |
390 | out_unlock: |
391 | rcu_read_unlock(); | |
392 | goto out; | |
1da177e4 LT |
393 | } |
394 | ||
7159039a YH |
395 | EXPORT_SYMBOL(inet6_bind); |
396 | ||
1da177e4 LT |
397 | int inet6_release(struct socket *sock) |
398 | { | |
399 | struct sock *sk = sock->sk; | |
400 | ||
401 | if (sk == NULL) | |
402 | return -EINVAL; | |
403 | ||
404 | /* Free mc lists */ | |
405 | ipv6_sock_mc_close(sk); | |
406 | ||
407 | /* Free ac lists */ | |
408 | ipv6_sock_ac_close(sk); | |
409 | ||
410 | return inet_release(sock); | |
411 | } | |
412 | ||
7159039a YH |
413 | EXPORT_SYMBOL(inet6_release); |
414 | ||
7d06b2e0 | 415 | void inet6_destroy_sock(struct sock *sk) |
1da177e4 LT |
416 | { |
417 | struct ipv6_pinfo *np = inet6_sk(sk); | |
418 | struct sk_buff *skb; | |
419 | struct ipv6_txoptions *opt; | |
420 | ||
1da177e4 LT |
421 | /* Release rx options */ |
422 | ||
423 | if ((skb = xchg(&np->pktoptions, NULL)) != NULL) | |
424 | kfree_skb(skb); | |
4b340ae2 BH |
425 | |
426 | if ((skb = xchg(&np->rxpmtu, NULL)) != NULL) | |
427 | kfree_skb(skb); | |
1da177e4 LT |
428 | |
429 | /* Free flowlabels */ | |
430 | fl6_free_socklist(sk); | |
431 | ||
432 | /* Free tx options */ | |
433 | ||
434 | if ((opt = xchg(&np->opt, NULL)) != NULL) | |
435 | sock_kfree_s(sk, opt, opt->tot_len); | |
1da177e4 LT |
436 | } |
437 | ||
3cf3dc6c ACM |
438 | EXPORT_SYMBOL_GPL(inet6_destroy_sock); |
439 | ||
1da177e4 LT |
440 | /* |
441 | * This does both peername and sockname. | |
442 | */ | |
1ab1457c | 443 | |
1da177e4 LT |
444 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
445 | int *uaddr_len, int peer) | |
446 | { | |
447 | struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr; | |
448 | struct sock *sk = sock->sk; | |
449 | struct inet_sock *inet = inet_sk(sk); | |
450 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1ab1457c | 451 | |
1da177e4 LT |
452 | sin->sin6_family = AF_INET6; |
453 | sin->sin6_flowinfo = 0; | |
454 | sin->sin6_scope_id = 0; | |
455 | if (peer) { | |
c720c7e8 | 456 | if (!inet->inet_dport) |
1da177e4 LT |
457 | return -ENOTCONN; |
458 | if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && | |
459 | peer == 1) | |
460 | return -ENOTCONN; | |
c720c7e8 | 461 | sin->sin6_port = inet->inet_dport; |
4e3fd7a0 | 462 | sin->sin6_addr = np->daddr; |
1da177e4 LT |
463 | if (np->sndflow) |
464 | sin->sin6_flowinfo = np->flow_label; | |
465 | } else { | |
466 | if (ipv6_addr_any(&np->rcv_saddr)) | |
4e3fd7a0 | 467 | sin->sin6_addr = np->saddr; |
1da177e4 | 468 | else |
4e3fd7a0 | 469 | sin->sin6_addr = np->rcv_saddr; |
1da177e4 | 470 | |
c720c7e8 | 471 | sin->sin6_port = inet->inet_sport; |
1da177e4 LT |
472 | } |
473 | if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
474 | sin->sin6_scope_id = sk->sk_bound_dev_if; | |
475 | *uaddr_len = sizeof(*sin); | |
a02cec21 | 476 | return 0; |
1da177e4 LT |
477 | } |
478 | ||
7159039a YH |
479 | EXPORT_SYMBOL(inet6_getname); |
480 | ||
1da177e4 LT |
481 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
482 | { | |
483 | struct sock *sk = sock->sk; | |
3b1e0a65 | 484 | struct net *net = sock_net(sk); |
1da177e4 | 485 | |
1ab1457c | 486 | switch(cmd) |
1da177e4 LT |
487 | { |
488 | case SIOCGSTAMP: | |
489 | return sock_get_timestamp(sk, (struct timeval __user *)arg); | |
490 | ||
ae40eb1e ED |
491 | case SIOCGSTAMPNS: |
492 | return sock_get_timestampns(sk, (struct timespec __user *)arg); | |
493 | ||
1da177e4 LT |
494 | case SIOCADDRT: |
495 | case SIOCDELRT: | |
1ab1457c | 496 | |
a02cec21 | 497 | return ipv6_route_ioctl(net, cmd, (void __user *)arg); |
1da177e4 LT |
498 | |
499 | case SIOCSIFADDR: | |
af284937 | 500 | return addrconf_add_ifaddr(net, (void __user *) arg); |
1da177e4 | 501 | case SIOCDIFADDR: |
af284937 | 502 | return addrconf_del_ifaddr(net, (void __user *) arg); |
1da177e4 | 503 | case SIOCSIFDSTADDR: |
af284937 | 504 | return addrconf_set_dstaddr(net, (void __user *) arg); |
1da177e4 | 505 | default: |
b5e5fa5e CH |
506 | if (!sk->sk_prot->ioctl) |
507 | return -ENOIOCTLCMD; | |
508 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
1da177e4 LT |
509 | } |
510 | /*NOTREACHED*/ | |
a02cec21 | 511 | return 0; |
1da177e4 LT |
512 | } |
513 | ||
7159039a YH |
514 | EXPORT_SYMBOL(inet6_ioctl); |
515 | ||
90ddc4f0 | 516 | const struct proto_ops inet6_stream_ops = { |
543d9cfe ACM |
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 */ | |
7ba42910 CG |
531 | .sendmsg = inet_sendmsg, /* ok */ |
532 | .recvmsg = inet_recvmsg, /* ok */ | |
543d9cfe | 533 | .mmap = sock_no_mmap, |
7ba42910 | 534 | .sendpage = inet_sendpage, |
a0974dd3 | 535 | .splice_read = tcp_splice_read, |
3fdadf7d | 536 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
537 | .compat_setsockopt = compat_sock_common_setsockopt, |
538 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 539 | #endif |
1da177e4 LT |
540 | }; |
541 | ||
90ddc4f0 | 542 | const struct proto_ops inet6_dgram_ops = { |
543d9cfe ACM |
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 */ | |
7ba42910 | 558 | .recvmsg = inet_recvmsg, /* ok */ |
543d9cfe ACM |
559 | .mmap = sock_no_mmap, |
560 | .sendpage = sock_no_sendpage, | |
3fdadf7d | 561 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
562 | .compat_setsockopt = compat_sock_common_setsockopt, |
563 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 564 | #endif |
1da177e4 LT |
565 | }; |
566 | ||
ec1b4cf7 | 567 | static const struct net_proto_family inet6_family_ops = { |
1da177e4 LT |
568 | .family = PF_INET6, |
569 | .create = inet6_create, | |
570 | .owner = THIS_MODULE, | |
571 | }; | |
572 | ||
87c3efbf | 573 | int inet6_register_protosw(struct inet_protosw *p) |
1da177e4 LT |
574 | { |
575 | struct list_head *lh; | |
576 | struct inet_protosw *answer; | |
1da177e4 | 577 | struct list_head *last_perm; |
87c3efbf DL |
578 | int protocol = p->protocol; |
579 | int ret; | |
1da177e4 LT |
580 | |
581 | spin_lock_bh(&inetsw6_lock); | |
582 | ||
87c3efbf | 583 | ret = -EINVAL; |
1da177e4 LT |
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; | |
87c3efbf | 589 | ret = -EPERM; |
1da177e4 LT |
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 | |
1ab1457c | 609 | * non-permanent entry. This means that when we remove this entry, the |
1da177e4 LT |
610 | * system automatically returns to the old behavior. |
611 | */ | |
612 | list_add_rcu(&p->list, last_perm); | |
87c3efbf | 613 | ret = 0; |
1da177e4 LT |
614 | out: |
615 | spin_unlock_bh(&inetsw6_lock); | |
87c3efbf | 616 | return ret; |
1da177e4 LT |
617 | |
618 | out_permanent: | |
619 | printk(KERN_ERR "Attempt to override permanent protocol %d.\n", | |
620 | protocol); | |
621 | goto out; | |
622 | ||
623 | out_illegal: | |
624 | printk(KERN_ERR | |
625 | "Ignoring attempt to register invalid socket type %d.\n", | |
626 | p->type); | |
627 | goto out; | |
628 | } | |
629 | ||
7159039a YH |
630 | EXPORT_SYMBOL(inet6_register_protosw); |
631 | ||
1da177e4 LT |
632 | void |
633 | inet6_unregister_protosw(struct inet_protosw *p) | |
634 | { | |
635 | if (INET_PROTOSW_PERMANENT & p->flags) { | |
636 | printk(KERN_ERR | |
637 | "Attempt to unregister permanent protocol %d.\n", | |
638 | p->protocol); | |
639 | } else { | |
640 | spin_lock_bh(&inetsw6_lock); | |
641 | list_del_rcu(&p->list); | |
642 | spin_unlock_bh(&inetsw6_lock); | |
643 | ||
644 | synchronize_net(); | |
645 | } | |
646 | } | |
647 | ||
7159039a YH |
648 | EXPORT_SYMBOL(inet6_unregister_protosw); |
649 | ||
b9750ce1 ACM |
650 | int inet6_sk_rebuild_header(struct sock *sk) |
651 | { | |
b9750ce1 | 652 | struct ipv6_pinfo *np = inet6_sk(sk); |
68d0c6d3 | 653 | struct dst_entry *dst; |
b9750ce1 ACM |
654 | |
655 | dst = __sk_dst_check(sk, np->dst_cookie); | |
656 | ||
657 | if (dst == NULL) { | |
658 | struct inet_sock *inet = inet_sk(sk); | |
20c59de2 | 659 | struct in6_addr *final_p, final; |
4c9483b2 DM |
660 | struct flowi6 fl6; |
661 | ||
662 | memset(&fl6, 0, sizeof(fl6)); | |
663 | fl6.flowi6_proto = sk->sk_protocol; | |
4e3fd7a0 AD |
664 | fl6.daddr = np->daddr; |
665 | fl6.saddr = np->saddr; | |
4c9483b2 DM |
666 | fl6.flowlabel = np->flow_label; |
667 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
668 | fl6.flowi6_mark = sk->sk_mark; | |
1958b856 DM |
669 | fl6.fl6_dport = inet->inet_dport; |
670 | fl6.fl6_sport = inet->inet_sport; | |
4c9483b2 DM |
671 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
672 | ||
673 | final_p = fl6_update_dst(&fl6, np->opt, &final); | |
674 | ||
675 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false); | |
68d0c6d3 | 676 | if (IS_ERR(dst)) { |
b9750ce1 | 677 | sk->sk_route_caps = 0; |
68d0c6d3 DM |
678 | sk->sk_err_soft = -PTR_ERR(dst); |
679 | return PTR_ERR(dst); | |
b9750ce1 ACM |
680 | } |
681 | ||
8e1ef0a9 | 682 | __ip6_dst_store(sk, dst, NULL, NULL); |
b9750ce1 ACM |
683 | } |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
688 | EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); | |
689 | ||
399c07de ACM |
690 | int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb) |
691 | { | |
692 | struct ipv6_pinfo *np = inet6_sk(sk); | |
693 | struct inet6_skb_parm *opt = IP6CB(skb); | |
694 | ||
695 | if (np->rxopt.all) { | |
696 | if ((opt->hop && (np->rxopt.bits.hopopts || | |
697 | np->rxopt.bits.ohopopts)) || | |
d56f90a7 ACM |
698 | ((IPV6_FLOWINFO_MASK & |
699 | *(__be32 *)skb_network_header(skb)) && | |
399c07de ACM |
700 | np->rxopt.bits.rxflow) || |
701 | (opt->srcrt && (np->rxopt.bits.srcrt || | |
702 | np->rxopt.bits.osrcrt)) || | |
703 | ((opt->dst1 || opt->dst0) && | |
704 | (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) | |
705 | return 1; | |
706 | } | |
707 | return 0; | |
708 | } | |
709 | ||
710 | EXPORT_SYMBOL_GPL(ipv6_opt_accepted); | |
711 | ||
787e9208 | 712 | static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto) |
662397fd | 713 | { |
41135cc8 | 714 | const struct inet6_protocol *ops = NULL; |
662397fd YH |
715 | |
716 | for (;;) { | |
717 | struct ipv6_opt_hdr *opth; | |
718 | int len; | |
719 | ||
720 | if (proto != NEXTHDR_HOP) { | |
721 | ops = rcu_dereference(inet6_protos[proto]); | |
722 | ||
723 | if (unlikely(!ops)) | |
724 | break; | |
725 | ||
726 | if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) | |
727 | break; | |
728 | } | |
729 | ||
730 | if (unlikely(!pskb_may_pull(skb, 8))) | |
731 | break; | |
732 | ||
733 | opth = (void *)skb->data; | |
734 | len = ipv6_optlen(opth); | |
735 | ||
736 | if (unlikely(!pskb_may_pull(skb, len))) | |
737 | break; | |
738 | ||
739 | proto = opth->nexthdr; | |
740 | __skb_pull(skb, len); | |
741 | } | |
742 | ||
787e9208 | 743 | return proto; |
662397fd YH |
744 | } |
745 | ||
746 | static int ipv6_gso_send_check(struct sk_buff *skb) | |
747 | { | |
b71d1d42 | 748 | const struct ipv6hdr *ipv6h; |
41135cc8 | 749 | const struct inet6_protocol *ops; |
662397fd YH |
750 | int err = -EINVAL; |
751 | ||
752 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
753 | goto out; | |
754 | ||
755 | ipv6h = ipv6_hdr(skb); | |
756 | __skb_pull(skb, sizeof(*ipv6h)); | |
757 | err = -EPROTONOSUPPORT; | |
758 | ||
759 | rcu_read_lock(); | |
787e9208 HX |
760 | ops = rcu_dereference(inet6_protos[ |
761 | ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); | |
762 | ||
662397fd YH |
763 | if (likely(ops && ops->gso_send_check)) { |
764 | skb_reset_transport_header(skb); | |
765 | err = ops->gso_send_check(skb); | |
766 | } | |
767 | rcu_read_unlock(); | |
768 | ||
769 | out: | |
770 | return err; | |
771 | } | |
772 | ||
c8f44aff MM |
773 | static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, |
774 | netdev_features_t features) | |
662397fd YH |
775 | { |
776 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
777 | struct ipv6hdr *ipv6h; | |
41135cc8 | 778 | const struct inet6_protocol *ops; |
ba735425 SS |
779 | int proto; |
780 | struct frag_hdr *fptr; | |
781 | unsigned int unfrag_ip6hlen; | |
782 | u8 *prevhdr; | |
783 | int offset = 0; | |
662397fd YH |
784 | |
785 | if (!(features & NETIF_F_V6_CSUM)) | |
786 | features &= ~NETIF_F_SG; | |
787 | ||
788 | if (unlikely(skb_shinfo(skb)->gso_type & | |
789 | ~(SKB_GSO_UDP | | |
790 | SKB_GSO_DODGY | | |
791 | SKB_GSO_TCP_ECN | | |
792 | SKB_GSO_TCPV6 | | |
793 | 0))) | |
794 | goto out; | |
795 | ||
796 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
797 | goto out; | |
798 | ||
799 | ipv6h = ipv6_hdr(skb); | |
800 | __skb_pull(skb, sizeof(*ipv6h)); | |
801 | segs = ERR_PTR(-EPROTONOSUPPORT); | |
802 | ||
ba735425 | 803 | proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); |
662397fd | 804 | rcu_read_lock(); |
ba735425 | 805 | ops = rcu_dereference(inet6_protos[proto]); |
662397fd YH |
806 | if (likely(ops && ops->gso_segment)) { |
807 | skb_reset_transport_header(skb); | |
808 | segs = ops->gso_segment(skb, features); | |
809 | } | |
810 | rcu_read_unlock(); | |
811 | ||
376d940e | 812 | if (IS_ERR(segs)) |
662397fd YH |
813 | goto out; |
814 | ||
815 | for (skb = segs; skb; skb = skb->next) { | |
816 | ipv6h = ipv6_hdr(skb); | |
817 | ipv6h->payload_len = htons(skb->len - skb->mac_len - | |
818 | sizeof(*ipv6h)); | |
ba735425 SS |
819 | if (proto == IPPROTO_UDP) { |
820 | unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); | |
821 | fptr = (struct frag_hdr *)(skb_network_header(skb) + | |
822 | unfrag_ip6hlen); | |
823 | fptr->frag_off = htons(offset); | |
824 | if (skb->next != NULL) | |
825 | fptr->frag_off |= htons(IP6_MF); | |
826 | offset += (ntohs(ipv6h->payload_len) - | |
827 | sizeof(struct frag_hdr)); | |
828 | } | |
662397fd YH |
829 | } |
830 | ||
831 | out: | |
832 | return segs; | |
833 | } | |
834 | ||
787e9208 HX |
835 | struct ipv6_gro_cb { |
836 | struct napi_gro_cb napi; | |
837 | int proto; | |
838 | }; | |
839 | ||
840 | #define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb) | |
841 | ||
842 | static struct sk_buff **ipv6_gro_receive(struct sk_buff **head, | |
843 | struct sk_buff *skb) | |
844 | { | |
41135cc8 | 845 | const struct inet6_protocol *ops; |
787e9208 HX |
846 | struct sk_buff **pp = NULL; |
847 | struct sk_buff *p; | |
848 | struct ipv6hdr *iph; | |
849 | unsigned int nlen; | |
a5b1cf28 HX |
850 | unsigned int hlen; |
851 | unsigned int off; | |
787e9208 HX |
852 | int flush = 1; |
853 | int proto; | |
ebad18e9 | 854 | __wsum csum; |
787e9208 | 855 | |
a5b1cf28 HX |
856 | off = skb_gro_offset(skb); |
857 | hlen = off + sizeof(*iph); | |
858 | iph = skb_gro_header_fast(skb, off); | |
859 | if (skb_gro_header_hard(skb, hlen)) { | |
860 | iph = skb_gro_header_slow(skb, hlen, off); | |
861 | if (unlikely(!iph)) | |
862 | goto out; | |
863 | } | |
787e9208 | 864 | |
86911732 HX |
865 | skb_gro_pull(skb, sizeof(*iph)); |
866 | skb_set_transport_header(skb, skb_gro_offset(skb)); | |
787e9208 | 867 | |
86911732 | 868 | flush += ntohs(iph->payload_len) != skb_gro_len(skb); |
787e9208 HX |
869 | |
870 | rcu_read_lock(); | |
86911732 | 871 | proto = iph->nexthdr; |
787e9208 | 872 | ops = rcu_dereference(inet6_protos[proto]); |
86911732 HX |
873 | if (!ops || !ops->gro_receive) { |
874 | __pskb_pull(skb, skb_gro_offset(skb)); | |
875 | proto = ipv6_gso_pull_exthdrs(skb, proto); | |
876 | skb_gro_pull(skb, -skb_transport_offset(skb)); | |
877 | skb_reset_transport_header(skb); | |
878 | __skb_push(skb, skb_gro_offset(skb)); | |
879 | ||
cdaf5570 | 880 | ops = rcu_dereference(inet6_protos[proto]); |
86911732 HX |
881 | if (!ops || !ops->gro_receive) |
882 | goto out_unlock; | |
883 | ||
884 | iph = ipv6_hdr(skb); | |
885 | } | |
886 | ||
887 | IPV6_GRO_CB(skb)->proto = proto; | |
787e9208 HX |
888 | |
889 | flush--; | |
787e9208 HX |
890 | nlen = skb_network_header_len(skb); |
891 | ||
892 | for (p = *head; p; p = p->next) { | |
893 | struct ipv6hdr *iph2; | |
894 | ||
895 | if (!NAPI_GRO_CB(p)->same_flow) | |
896 | continue; | |
897 | ||
898 | iph2 = ipv6_hdr(p); | |
899 | ||
900 | /* All fields must match except length. */ | |
901 | if (nlen != skb_network_header_len(p) || | |
902 | memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) || | |
903 | memcmp(&iph->nexthdr, &iph2->nexthdr, | |
904 | nlen - offsetof(struct ipv6hdr, nexthdr))) { | |
905 | NAPI_GRO_CB(p)->same_flow = 0; | |
906 | continue; | |
907 | } | |
908 | ||
909 | NAPI_GRO_CB(p)->flush |= flush; | |
910 | } | |
911 | ||
912 | NAPI_GRO_CB(skb)->flush |= flush; | |
913 | ||
ebad18e9 HX |
914 | csum = skb->csum; |
915 | skb_postpull_rcsum(skb, iph, skb_network_header_len(skb)); | |
916 | ||
787e9208 HX |
917 | pp = ops->gro_receive(head, skb); |
918 | ||
ebad18e9 HX |
919 | skb->csum = csum; |
920 | ||
787e9208 HX |
921 | out_unlock: |
922 | rcu_read_unlock(); | |
923 | ||
924 | out: | |
925 | NAPI_GRO_CB(skb)->flush |= flush; | |
926 | ||
927 | return pp; | |
928 | } | |
929 | ||
930 | static int ipv6_gro_complete(struct sk_buff *skb) | |
931 | { | |
41135cc8 | 932 | const struct inet6_protocol *ops; |
787e9208 HX |
933 | struct ipv6hdr *iph = ipv6_hdr(skb); |
934 | int err = -ENOSYS; | |
935 | ||
936 | iph->payload_len = htons(skb->len - skb_network_offset(skb) - | |
937 | sizeof(*iph)); | |
938 | ||
939 | rcu_read_lock(); | |
940 | ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]); | |
941 | if (WARN_ON(!ops || !ops->gro_complete)) | |
942 | goto out_unlock; | |
943 | ||
944 | err = ops->gro_complete(skb); | |
945 | ||
946 | out_unlock: | |
947 | rcu_read_unlock(); | |
948 | ||
949 | return err; | |
950 | } | |
951 | ||
7546dd97 | 952 | static struct packet_type ipv6_packet_type __read_mostly = { |
09640e63 | 953 | .type = cpu_to_be16(ETH_P_IPV6), |
662397fd YH |
954 | .func = ipv6_rcv, |
955 | .gso_send_check = ipv6_gso_send_check, | |
956 | .gso_segment = ipv6_gso_segment, | |
787e9208 HX |
957 | .gro_receive = ipv6_gro_receive, |
958 | .gro_complete = ipv6_gro_complete, | |
662397fd YH |
959 | }; |
960 | ||
961 | static int __init ipv6_packet_init(void) | |
962 | { | |
963 | dev_add_pack(&ipv6_packet_type); | |
964 | return 0; | |
965 | } | |
966 | ||
967 | static void ipv6_packet_cleanup(void) | |
968 | { | |
969 | dev_remove_pack(&ipv6_packet_type); | |
970 | } | |
971 | ||
e43291cb DL |
972 | static int __net_init ipv6_init_mibs(struct net *net) |
973 | { | |
7d720c3e | 974 | if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6, |
1823e4c8 ED |
975 | sizeof(struct udp_mib), |
976 | __alignof__(struct udp_mib)) < 0) | |
0c7ed677 | 977 | return -ENOMEM; |
7d720c3e | 978 | if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6, |
1823e4c8 ED |
979 | sizeof(struct udp_mib), |
980 | __alignof__(struct udp_mib)) < 0) | |
be713a44 | 981 | goto err_udplite_mib; |
7d720c3e | 982 | if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics, |
1823e4c8 ED |
983 | sizeof(struct ipstats_mib), |
984 | __alignof__(struct ipstats_mib)) < 0) | |
9261e537 | 985 | goto err_ip_mib; |
7d720c3e | 986 | if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics, |
1823e4c8 ED |
987 | sizeof(struct icmpv6_mib), |
988 | __alignof__(struct icmpv6_mib)) < 0) | |
9261e537 | 989 | goto err_icmp_mib; |
2a24444f ED |
990 | net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib), |
991 | GFP_KERNEL); | |
992 | if (!net->mib.icmpv6msg_statistics) | |
9261e537 | 993 | goto err_icmpmsg_mib; |
e43291cb | 994 | return 0; |
be713a44 | 995 | |
9261e537 | 996 | err_icmpmsg_mib: |
7d720c3e | 997 | snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); |
9261e537 | 998 | err_icmp_mib: |
7d720c3e | 999 | snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); |
9261e537 | 1000 | err_ip_mib: |
7d720c3e | 1001 | snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); |
be713a44 | 1002 | err_udplite_mib: |
7d720c3e | 1003 | snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); |
be713a44 | 1004 | return -ENOMEM; |
e43291cb DL |
1005 | } |
1006 | ||
2c8c1e72 | 1007 | static void ipv6_cleanup_mibs(struct net *net) |
e43291cb | 1008 | { |
7d720c3e TH |
1009 | snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); |
1010 | snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); | |
1011 | snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); | |
1012 | snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); | |
2a24444f | 1013 | kfree(net->mib.icmpv6msg_statistics); |
e43291cb DL |
1014 | } |
1015 | ||
e7dc8494 | 1016 | static int __net_init inet6_net_init(struct net *net) |
81c1c178 | 1017 | { |
0c96d8c5 DL |
1018 | int err = 0; |
1019 | ||
99bc9c4e | 1020 | net->ipv6.sysctl.bindv6only = 0; |
41a76906 | 1021 | net->ipv6.sysctl.icmpv6_time = 1*HZ; |
e71e0349 | 1022 | |
e43291cb DL |
1023 | err = ipv6_init_mibs(net); |
1024 | if (err) | |
1025 | return err; | |
0c96d8c5 DL |
1026 | #ifdef CONFIG_PROC_FS |
1027 | err = udp6_proc_init(net); | |
1028 | if (err) | |
1029 | goto out; | |
6f8b13bc DL |
1030 | err = tcp6_proc_init(net); |
1031 | if (err) | |
1032 | goto proc_tcp6_fail; | |
6ab57e7e DL |
1033 | err = ac6_proc_init(net); |
1034 | if (err) | |
1035 | goto proc_ac6_fail; | |
0c96d8c5 DL |
1036 | #endif |
1037 | return err; | |
6f8b13bc DL |
1038 | |
1039 | #ifdef CONFIG_PROC_FS | |
6ab57e7e DL |
1040 | proc_ac6_fail: |
1041 | tcp6_proc_exit(net); | |
6f8b13bc DL |
1042 | proc_tcp6_fail: |
1043 | udp6_proc_exit(net); | |
e43291cb DL |
1044 | out: |
1045 | ipv6_cleanup_mibs(net); | |
1046 | return err; | |
6f8b13bc | 1047 | #endif |
81c1c178 DL |
1048 | } |
1049 | ||
2c8c1e72 | 1050 | static void __net_exit inet6_net_exit(struct net *net) |
81c1c178 | 1051 | { |
0c96d8c5 DL |
1052 | #ifdef CONFIG_PROC_FS |
1053 | udp6_proc_exit(net); | |
6f8b13bc | 1054 | tcp6_proc_exit(net); |
6ab57e7e | 1055 | ac6_proc_exit(net); |
0c96d8c5 | 1056 | #endif |
e43291cb | 1057 | ipv6_cleanup_mibs(net); |
81c1c178 DL |
1058 | } |
1059 | ||
1060 | static struct pernet_operations inet6_net_ops = { | |
1061 | .init = inet6_net_init, | |
1062 | .exit = inet6_net_exit, | |
1063 | }; | |
1064 | ||
1da177e4 LT |
1065 | static int __init inet6_init(void) |
1066 | { | |
1067 | struct sk_buff *dummy_skb; | |
1ab1457c | 1068 | struct list_head *r; |
fe7ca2e1 | 1069 | int err = 0; |
1da177e4 | 1070 | |
ef047f5e YH |
1071 | BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)); |
1072 | ||
fe7ca2e1 BH |
1073 | /* Register the socket-side information for inet6_create. */ |
1074 | for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) | |
1075 | INIT_LIST_HEAD(r); | |
1076 | ||
56d417b1 | 1077 | if (disable_ipv6_mod) { |
fe7ca2e1 BH |
1078 | printk(KERN_INFO |
1079 | "IPv6: Loaded, but administratively disabled, " | |
1080 | "reboot required to enable\n"); | |
1081 | goto out; | |
1082 | } | |
1083 | ||
1da177e4 LT |
1084 | err = proto_register(&tcpv6_prot, 1); |
1085 | if (err) | |
1086 | goto out; | |
1087 | ||
1088 | err = proto_register(&udpv6_prot, 1); | |
1089 | if (err) | |
1090 | goto out_unregister_tcp_proto; | |
1091 | ||
ba4e58ec | 1092 | err = proto_register(&udplitev6_prot, 1); |
1da177e4 LT |
1093 | if (err) |
1094 | goto out_unregister_udp_proto; | |
1095 | ||
ba4e58ec GR |
1096 | err = proto_register(&rawv6_prot, 1); |
1097 | if (err) | |
1098 | goto out_unregister_udplite_proto; | |
1099 | ||
1da177e4 | 1100 | |
1da177e4 LT |
1101 | /* We MUST register RAW sockets before we create the ICMP6, |
1102 | * IGMP6, or NDISC control sockets. | |
1103 | */ | |
7f4e4868 DL |
1104 | err = rawv6_init(); |
1105 | if (err) | |
1106 | goto out_unregister_raw_proto; | |
1da177e4 LT |
1107 | |
1108 | /* Register the family here so that the init calls below will | |
1109 | * be able to create sockets. (?? is this dangerous ??) | |
1110 | */ | |
8eb55910 DM |
1111 | err = sock_register(&inet6_family_ops); |
1112 | if (err) | |
7f4e4868 | 1113 | goto out_sock_register_fail; |
1da177e4 | 1114 | |
eeb61f71 AV |
1115 | #ifdef CONFIG_SYSCTL |
1116 | err = ipv6_static_sysctl_register(); | |
1117 | if (err) | |
1118 | goto static_sysctl_fail; | |
1119 | #endif | |
3dc43e3e GC |
1120 | tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem; |
1121 | ||
1da177e4 LT |
1122 | /* |
1123 | * ipngwg API draft makes clear that the correct semantics | |
1124 | * for TCP and UDP is to consider one TCP and UDP instance | |
25985edc | 1125 | * in a host available by both INET and INET6 APIs and |
1da177e4 LT |
1126 | * able to communicate via both network protocols. |
1127 | */ | |
1128 | ||
81c1c178 DL |
1129 | err = register_pernet_subsys(&inet6_net_ops); |
1130 | if (err) | |
1131 | goto register_pernet_fail; | |
9b0f976f | 1132 | err = icmpv6_init(); |
1da177e4 LT |
1133 | if (err) |
1134 | goto icmp_fail; | |
623d1a1a WC |
1135 | err = ip6_mr_init(); |
1136 | if (err) | |
1137 | goto ipmr_fail; | |
9b0f976f | 1138 | err = ndisc_init(); |
1da177e4 LT |
1139 | if (err) |
1140 | goto ndisc_fail; | |
9b0f976f | 1141 | err = igmp6_init(); |
1da177e4 LT |
1142 | if (err) |
1143 | goto igmp_fail; | |
2cc7d573 HW |
1144 | err = ipv6_netfilter_init(); |
1145 | if (err) | |
1146 | goto netfilter_fail; | |
1da177e4 LT |
1147 | /* Create /proc/foo6 entries. */ |
1148 | #ifdef CONFIG_PROC_FS | |
1149 | err = -ENOMEM; | |
1150 | if (raw6_proc_init()) | |
1151 | goto proc_raw6_fail; | |
ba4e58ec GR |
1152 | if (udplite6_proc_init()) |
1153 | goto proc_udplite6_fail; | |
1da177e4 LT |
1154 | if (ipv6_misc_proc_init()) |
1155 | goto proc_misc6_fail; | |
1da177e4 LT |
1156 | if (if6_proc_init()) |
1157 | goto proc_if6_fail; | |
1158 | #endif | |
e2fddf5e DL |
1159 | err = ip6_route_init(); |
1160 | if (err) | |
1161 | goto ip6_route_fail; | |
0a3e78ac DL |
1162 | err = ip6_flowlabel_init(); |
1163 | if (err) | |
1164 | goto ip6_flowlabel_fail; | |
1da177e4 LT |
1165 | err = addrconf_init(); |
1166 | if (err) | |
1167 | goto addrconf_fail; | |
1da177e4 LT |
1168 | |
1169 | /* Init v6 extension headers. */ | |
248b238d DL |
1170 | err = ipv6_exthdrs_init(); |
1171 | if (err) | |
1172 | goto ipv6_exthdrs_fail; | |
1173 | ||
853cbbaa DL |
1174 | err = ipv6_frag_init(); |
1175 | if (err) | |
1176 | goto ipv6_frag_fail; | |
1da177e4 LT |
1177 | |
1178 | /* Init v6 transport protocols. */ | |
7f4e4868 DL |
1179 | err = udpv6_init(); |
1180 | if (err) | |
1181 | goto udpv6_fail; | |
e2ed4052 | 1182 | |
7f4e4868 DL |
1183 | err = udplitev6_init(); |
1184 | if (err) | |
1185 | goto udplitev6_fail; | |
1186 | ||
1187 | err = tcpv6_init(); | |
1188 | if (err) | |
1189 | goto tcpv6_fail; | |
1190 | ||
1191 | err = ipv6_packet_init(); | |
1192 | if (err) | |
1193 | goto ipv6_packet_fail; | |
94911fe3 BT |
1194 | |
1195 | #ifdef CONFIG_SYSCTL | |
1196 | err = ipv6_sysctl_register(); | |
1197 | if (err) | |
1198 | goto sysctl_fail; | |
1199 | #endif | |
1da177e4 LT |
1200 | out: |
1201 | return err; | |
1202 | ||
94911fe3 BT |
1203 | #ifdef CONFIG_SYSCTL |
1204 | sysctl_fail: | |
1205 | ipv6_packet_cleanup(); | |
1206 | #endif | |
7f4e4868 DL |
1207 | ipv6_packet_fail: |
1208 | tcpv6_exit(); | |
1209 | tcpv6_fail: | |
1210 | udplitev6_exit(); | |
1211 | udplitev6_fail: | |
1212 | udpv6_exit(); | |
1213 | udpv6_fail: | |
1214 | ipv6_frag_exit(); | |
853cbbaa DL |
1215 | ipv6_frag_fail: |
1216 | ipv6_exthdrs_exit(); | |
248b238d DL |
1217 | ipv6_exthdrs_fail: |
1218 | addrconf_cleanup(); | |
1da177e4 LT |
1219 | addrconf_fail: |
1220 | ip6_flowlabel_cleanup(); | |
0a3e78ac | 1221 | ip6_flowlabel_fail: |
1da177e4 | 1222 | ip6_route_cleanup(); |
e2fddf5e | 1223 | ip6_route_fail: |
1da177e4 LT |
1224 | #ifdef CONFIG_PROC_FS |
1225 | if6_proc_exit(); | |
1226 | proc_if6_fail: | |
1da177e4 LT |
1227 | ipv6_misc_proc_exit(); |
1228 | proc_misc6_fail: | |
ba4e58ec GR |
1229 | udplite6_proc_exit(); |
1230 | proc_udplite6_fail: | |
1da177e4 LT |
1231 | raw6_proc_exit(); |
1232 | proc_raw6_fail: | |
1233 | #endif | |
2cc7d573 HW |
1234 | ipv6_netfilter_fini(); |
1235 | netfilter_fail: | |
1da177e4 LT |
1236 | igmp6_cleanup(); |
1237 | igmp_fail: | |
1238 | ndisc_cleanup(); | |
1239 | ndisc_fail: | |
623d1a1a WC |
1240 | ip6_mr_cleanup(); |
1241 | ipmr_fail: | |
1da177e4 LT |
1242 | icmpv6_cleanup(); |
1243 | icmp_fail: | |
81c1c178 DL |
1244 | unregister_pernet_subsys(&inet6_net_ops); |
1245 | register_pernet_fail: | |
eeb61f71 AV |
1246 | #ifdef CONFIG_SYSCTL |
1247 | ipv6_static_sysctl_unregister(); | |
1248 | static_sysctl_fail: | |
1249 | #endif | |
8eb55910 | 1250 | sock_unregister(PF_INET6); |
e2fddf5e | 1251 | rtnl_unregister_all(PF_INET6); |
7f4e4868 DL |
1252 | out_sock_register_fail: |
1253 | rawv6_exit(); | |
1da177e4 LT |
1254 | out_unregister_raw_proto: |
1255 | proto_unregister(&rawv6_prot); | |
ba4e58ec GR |
1256 | out_unregister_udplite_proto: |
1257 | proto_unregister(&udplitev6_prot); | |
1da177e4 LT |
1258 | out_unregister_udp_proto: |
1259 | proto_unregister(&udpv6_prot); | |
1260 | out_unregister_tcp_proto: | |
1261 | proto_unregister(&tcpv6_prot); | |
1262 | goto out; | |
1263 | } | |
1264 | module_init(inet6_init); | |
1265 | ||
1266 | static void __exit inet6_exit(void) | |
1267 | { | |
56d417b1 | 1268 | if (disable_ipv6_mod) |
ff8cf9a9 JD |
1269 | return; |
1270 | ||
1da177e4 LT |
1271 | /* First of all disallow new sockets creation. */ |
1272 | sock_unregister(PF_INET6); | |
c127ea2c TG |
1273 | /* Disallow any further netlink messages */ |
1274 | rtnl_unregister_all(PF_INET6); | |
ca17c233 | 1275 | |
94911fe3 BT |
1276 | #ifdef CONFIG_SYSCTL |
1277 | ipv6_sysctl_unregister(); | |
1278 | #endif | |
7f4e4868 DL |
1279 | udpv6_exit(); |
1280 | udplitev6_exit(); | |
1281 | tcpv6_exit(); | |
1282 | ||
ca17c233 JJ |
1283 | /* Cleanup code parts. */ |
1284 | ipv6_packet_cleanup(); | |
853cbbaa | 1285 | ipv6_frag_exit(); |
248b238d | 1286 | ipv6_exthdrs_exit(); |
ca17c233 JJ |
1287 | addrconf_cleanup(); |
1288 | ip6_flowlabel_cleanup(); | |
1289 | ip6_route_cleanup(); | |
1da177e4 | 1290 | #ifdef CONFIG_PROC_FS |
ca17c233 JJ |
1291 | |
1292 | /* Cleanup code parts. */ | |
1da177e4 | 1293 | if6_proc_exit(); |
1ab1457c | 1294 | ipv6_misc_proc_exit(); |
1ab1457c | 1295 | udplite6_proc_exit(); |
1ab1457c | 1296 | raw6_proc_exit(); |
2c8d7ca0 | 1297 | #endif |
2cc7d573 | 1298 | ipv6_netfilter_fini(); |
ca17c233 | 1299 | igmp6_cleanup(); |
1da177e4 | 1300 | ndisc_cleanup(); |
623d1a1a | 1301 | ip6_mr_cleanup(); |
1da177e4 | 1302 | icmpv6_cleanup(); |
7f4e4868 | 1303 | rawv6_exit(); |
94911fe3 | 1304 | |
81c1c178 | 1305 | unregister_pernet_subsys(&inet6_net_ops); |
eeb61f71 AV |
1306 | #ifdef CONFIG_SYSCTL |
1307 | ipv6_static_sysctl_unregister(); | |
1308 | #endif | |
1da177e4 | 1309 | proto_unregister(&rawv6_prot); |
ca17c233 | 1310 | proto_unregister(&udplitev6_prot); |
1da177e4 LT |
1311 | proto_unregister(&udpv6_prot); |
1312 | proto_unregister(&tcpv6_prot); | |
1f2ccd00 JDB |
1313 | |
1314 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ | |
1da177e4 LT |
1315 | } |
1316 | module_exit(inet6_exit); | |
1317 | ||
1318 | MODULE_ALIAS_NETPROTO(PF_INET6); |