Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * PF_INET6 socket protocol family | |
1ab1457c | 4 | * Linux INET6 implementation |
1da177e4 LT |
5 | * |
6 | * Authors: | |
1ab1457c | 7 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
8 | * |
9 | * Adapted from linux/net/ipv4/af_inet.c | |
10 | * | |
67ba4152 | 11 | * Fixes: |
1da177e4 | 12 | * piggy, Karl Knutson : Socket protocol table |
67ba4152 IM |
13 | * Hideaki YOSHIFUJI : sin6_scope_id support |
14 | * Arnaldo Melo : check proc_net_create return, cleanups | |
1da177e4 LT |
15 | */ |
16 | ||
f3213831 | 17 | #define pr_fmt(fmt) "IPv6: " fmt |
1da177e4 LT |
18 | |
19 | #include <linux/module.h> | |
4fc268d2 | 20 | #include <linux/capability.h> |
1da177e4 LT |
21 | #include <linux/errno.h> |
22 | #include <linux/types.h> | |
23 | #include <linux/socket.h> | |
24 | #include <linux/in.h> | |
25 | #include <linux/kernel.h> | |
1da177e4 LT |
26 | #include <linux/timer.h> |
27 | #include <linux/string.h> | |
28 | #include <linux/sockios.h> | |
29 | #include <linux/net.h> | |
30 | #include <linux/fcntl.h> | |
31 | #include <linux/mm.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/proc_fs.h> | |
34 | #include <linux/stat.h> | |
35 | #include <linux/init.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
1da177e4 LT |
37 | |
38 | #include <linux/inet.h> | |
39 | #include <linux/netdevice.h> | |
40 | #include <linux/icmpv6.h> | |
2cc7d573 | 41 | #include <linux/netfilter_ipv6.h> |
1da177e4 LT |
42 | |
43 | #include <net/ip.h> | |
44 | #include <net/ipv6.h> | |
45 | #include <net/udp.h> | |
ba4e58ec | 46 | #include <net/udplite.h> |
1da177e4 | 47 | #include <net/tcp.h> |
6d0bfe22 | 48 | #include <net/ping.h> |
1da177e4 LT |
49 | #include <net/protocol.h> |
50 | #include <net/inet_common.h> | |
1668e010 | 51 | #include <net/route.h> |
1da177e4 LT |
52 | #include <net/transp_v6.h> |
53 | #include <net/ip6_route.h> | |
54 | #include <net/addrconf.h> | |
3616d08b | 55 | #include <net/ipv6_stubs.h> |
f564f45c | 56 | #include <net/ndisc.h> |
1da177e4 LT |
57 | #ifdef CONFIG_IPV6_TUNNEL |
58 | #include <net/ip6_tunnel.h> | |
59 | #endif | |
cb72d382 | 60 | #include <net/calipso.h> |
915d7e5e | 61 | #include <net/seg6.h> |
1da177e4 | 62 | |
7c0f6ba6 | 63 | #include <linux/uaccess.h> |
7bc570c8 | 64 | #include <linux/mroute6.h> |
1da177e4 | 65 | |
a6024562 TH |
66 | #include "ip6_offload.h" |
67 | ||
1da177e4 LT |
68 | MODULE_AUTHOR("Cast of dozens"); |
69 | MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); | |
70 | MODULE_LICENSE("GPL"); | |
71 | ||
f1267347 | 72 | /* The inetsw6 table contains everything that inet6_create needs to |
1da177e4 LT |
73 | * build a new socket. |
74 | */ | |
75 | static struct list_head inetsw6[SOCK_MAX]; | |
76 | static DEFINE_SPINLOCK(inetsw6_lock); | |
77 | ||
56d417b1 BH |
78 | struct ipv6_params ipv6_defaults = { |
79 | .disable_ipv6 = 0, | |
80 | .autoconf = 1, | |
81 | }; | |
82 | ||
647c0c70 | 83 | static int disable_ipv6_mod; |
56d417b1 BH |
84 | |
85 | module_param_named(disable, disable_ipv6_mod, int, 0444); | |
86 | MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional"); | |
87 | ||
88 | module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444); | |
89 | MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces"); | |
90 | ||
91 | module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444); | |
92 | MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces"); | |
fe7ca2e1 | 93 | |
e4348637 DA |
94 | bool ipv6_mod_enabled(void) |
95 | { | |
96 | return disable_ipv6_mod == 0; | |
97 | } | |
98 | EXPORT_SYMBOL_GPL(ipv6_mod_enabled); | |
99 | ||
1da177e4 LT |
100 | static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) |
101 | { | |
102 | const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); | |
103 | ||
104 | return (struct ipv6_pinfo *)(((u8 *)sk) + offset); | |
105 | } | |
106 | ||
3f378b68 EP |
107 | static int inet6_create(struct net *net, struct socket *sock, int protocol, |
108 | int kern) | |
1da177e4 LT |
109 | { |
110 | struct inet_sock *inet; | |
111 | struct ipv6_pinfo *np; | |
112 | struct sock *sk; | |
1da177e4 LT |
113 | struct inet_protosw *answer; |
114 | struct proto *answer_prot; | |
115 | unsigned char answer_flags; | |
af1afe86 YH |
116 | int try_loading_module = 0; |
117 | int err; | |
1da177e4 | 118 | |
79462ad0 HFS |
119 | if (protocol < 0 || protocol >= IPPROTO_MAX) |
120 | return -EINVAL; | |
121 | ||
1da177e4 | 122 | /* Look for the requested type/protocol pair. */ |
af1afe86 YH |
123 | lookup_protocol: |
124 | err = -ESOCKTNOSUPPORT; | |
1da177e4 | 125 | rcu_read_lock(); |
696adfe8 | 126 | list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { |
1da177e4 | 127 | |
696adfe8 | 128 | err = 0; |
1da177e4 LT |
129 | /* Check the non-wild match. */ |
130 | if (protocol == answer->protocol) { | |
131 | if (protocol != IPPROTO_IP) | |
132 | break; | |
133 | } else { | |
134 | /* Check for the two wild cases. */ | |
135 | if (IPPROTO_IP == protocol) { | |
136 | protocol = answer->protocol; | |
137 | break; | |
138 | } | |
139 | if (IPPROTO_IP == answer->protocol) | |
140 | break; | |
141 | } | |
af1afe86 | 142 | err = -EPROTONOSUPPORT; |
1da177e4 LT |
143 | } |
144 | ||
696adfe8 | 145 | if (err) { |
af1afe86 YH |
146 | if (try_loading_module < 2) { |
147 | rcu_read_unlock(); | |
148 | /* | |
149 | * Be more specific, e.g. net-pf-10-proto-132-type-1 | |
150 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) | |
151 | */ | |
152 | if (++try_loading_module == 1) | |
153 | request_module("net-pf-%d-proto-%d-type-%d", | |
154 | PF_INET6, protocol, sock->type); | |
155 | /* | |
156 | * Fall back to generic, e.g. net-pf-10-proto-132 | |
157 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP) | |
158 | */ | |
159 | else | |
160 | request_module("net-pf-%d-proto-%d", | |
161 | PF_INET6, protocol); | |
162 | goto lookup_protocol; | |
163 | } else | |
164 | goto out_rcu_unlock; | |
165 | } | |
166 | ||
167 | err = -EPERM; | |
af31f412 EB |
168 | if (sock->type == SOCK_RAW && !kern && |
169 | !ns_capable(net->user_ns, CAP_NET_RAW)) | |
1da177e4 | 170 | goto out_rcu_unlock; |
1da177e4 LT |
171 | |
172 | sock->ops = answer->ops; | |
1da177e4 | 173 | answer_prot = answer->prot; |
1da177e4 LT |
174 | answer_flags = answer->flags; |
175 | rcu_read_unlock(); | |
176 | ||
63159f29 | 177 | WARN_ON(!answer_prot->slab); |
1da177e4 | 178 | |
af1afe86 | 179 | err = -ENOBUFS; |
11aa9c28 | 180 | sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern); |
63159f29 | 181 | if (!sk) |
1da177e4 LT |
182 | goto out; |
183 | ||
184 | sock_init_data(sock, sk); | |
185 | ||
af1afe86 | 186 | err = 0; |
1da177e4 | 187 | if (INET_PROTOSW_REUSE & answer_flags) |
4a17fd52 | 188 | sk->sk_reuse = SK_CAN_REUSE; |
1da177e4 LT |
189 | |
190 | inet = inet_sk(sk); | |
469de9b9 | 191 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
1da177e4 LT |
192 | |
193 | if (SOCK_RAW == sock->type) { | |
c720c7e8 | 194 | inet->inet_num = protocol; |
1da177e4 LT |
195 | if (IPPROTO_RAW == protocol) |
196 | inet->hdrincl = 1; | |
197 | } | |
198 | ||
e6848976 | 199 | sk->sk_destruct = inet_sock_destruct; |
1da177e4 LT |
200 | sk->sk_family = PF_INET6; |
201 | sk->sk_protocol = protocol; | |
202 | ||
203 | sk->sk_backlog_rcv = answer->prot->backlog_rcv; | |
204 | ||
205 | inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); | |
206 | np->hop_limit = -1; | |
f935aa9e | 207 | np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; |
1da177e4 | 208 | np->mc_loop = 1; |
15033f04 | 209 | np->mc_all = 1; |
1da177e4 | 210 | np->pmtudisc = IPV6_PMTUDISC_WANT; |
a346abe0 | 211 | np->repflow = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED; |
9fe516ba | 212 | sk->sk_ipv6only = net->ipv6.sysctl.bindv6only; |
1ab1457c | 213 | |
1da177e4 LT |
214 | /* Init the ipv4 part of the socket since we can have sockets |
215 | * using v6 API for ipv4. | |
216 | */ | |
217 | inet->uc_ttl = -1; | |
218 | ||
219 | inet->mc_loop = 1; | |
220 | inet->mc_ttl = 1; | |
221 | inet->mc_index = 0; | |
222 | inet->mc_list = NULL; | |
4c507d28 | 223 | inet->rcv_tos = 0; |
1da177e4 | 224 | |
974eda11 | 225 | if (net->ipv4.sysctl_ip_no_pmtu_disc) |
1da177e4 LT |
226 | inet->pmtudisc = IP_PMTUDISC_DONT; |
227 | else | |
228 | inet->pmtudisc = IP_PMTUDISC_WANT; | |
1ab1457c | 229 | /* |
e6848976 ACM |
230 | * Increment only the relevant sk_prot->socks debug field, this changes |
231 | * the previous behaviour of incrementing both the equivalent to | |
232 | * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. | |
233 | * | |
234 | * This allows better debug granularity as we'll know exactly how many | |
235 | * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 | |
236 | * transport protocol socks. -acme | |
237 | */ | |
238 | sk_refcnt_debug_inc(sk); | |
1da177e4 | 239 | |
c720c7e8 | 240 | if (inet->inet_num) { |
1da177e4 LT |
241 | /* It assumes that any protocol which allows |
242 | * the user to assign a number at socket | |
243 | * creation time automatically shares. | |
244 | */ | |
c720c7e8 | 245 | inet->inet_sport = htons(inet->inet_num); |
086c653f CG |
246 | err = sk->sk_prot->hash(sk); |
247 | if (err) { | |
248 | sk_common_release(sk); | |
249 | goto out; | |
250 | } | |
1da177e4 LT |
251 | } |
252 | if (sk->sk_prot->init) { | |
af1afe86 YH |
253 | err = sk->sk_prot->init(sk); |
254 | if (err) { | |
1da177e4 LT |
255 | sk_common_release(sk); |
256 | goto out; | |
257 | } | |
258 | } | |
61023658 DA |
259 | |
260 | if (!kern) { | |
261 | err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk); | |
262 | if (err) { | |
263 | sk_common_release(sk); | |
264 | goto out; | |
265 | } | |
266 | } | |
1da177e4 | 267 | out: |
af1afe86 | 268 | return err; |
1da177e4 LT |
269 | out_rcu_unlock: |
270 | rcu_read_unlock(); | |
271 | goto out; | |
272 | } | |
273 | ||
032234d8 DA |
274 | static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len, |
275 | bool force_bind_address_no_port, bool with_lock) | |
3679d585 AI |
276 | { |
277 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr; | |
278 | struct inet_sock *inet = inet_sk(sk); | |
279 | struct ipv6_pinfo *np = inet6_sk(sk); | |
280 | struct net *net = sock_net(sk); | |
281 | __be32 v4addr = 0; | |
282 | unsigned short snum; | |
283 | bool saved_ipv6only; | |
284 | int addr_type = 0; | |
285 | int err = 0; | |
286 | ||
5a079c30 | 287 | if (addr->sin6_family != AF_INET6) |
c349a528 | 288 | return -EAFNOSUPPORT; |
5a079c30 | 289 | |
1da177e4 | 290 | addr_type = ipv6_addr_type(&addr->sin6_addr); |
3679d585 | 291 | if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM) |
1da177e4 LT |
292 | return -EINVAL; |
293 | ||
294 | snum = ntohs(addr->sin6_port); | |
4548b683 KJ |
295 | if (snum && snum < inet_prot_sock(net) && |
296 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) | |
1da177e4 LT |
297 | return -EACCES; |
298 | ||
3679d585 AI |
299 | if (with_lock) |
300 | lock_sock(sk); | |
1da177e4 LT |
301 | |
302 | /* Check these errors (active socket, double bind). */ | |
c720c7e8 | 303 | if (sk->sk_state != TCP_CLOSE || inet->inet_num) { |
1da177e4 LT |
304 | err = -EINVAL; |
305 | goto out; | |
306 | } | |
307 | ||
308 | /* Check if the address belongs to the host. */ | |
309 | if (addr_type == IPV6_ADDR_MAPPED) { | |
ec90ad33 | 310 | struct net_device *dev = NULL; |
63d9950b VY |
311 | int chk_addr_ret; |
312 | ||
783ed5a7 VY |
313 | /* Binding to v4-mapped address on a v6-only socket |
314 | * makes no sense | |
315 | */ | |
9fe516ba | 316 | if (sk->sk_ipv6only) { |
783ed5a7 VY |
317 | err = -EINVAL; |
318 | goto out; | |
319 | } | |
63d9950b | 320 | |
d4a7e9bb | 321 | rcu_read_lock(); |
ec90ad33 DA |
322 | if (sk->sk_bound_dev_if) { |
323 | dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); | |
324 | if (!dev) { | |
325 | err = -ENODEV; | |
d4a7e9bb | 326 | goto out_unlock; |
ec90ad33 DA |
327 | } |
328 | } | |
329 | ||
a34f0b31 | 330 | /* Reproduce AF_INET checks to make the bindings consistent */ |
1da177e4 | 331 | v4addr = addr->sin6_addr.s6_addr32[3]; |
ec90ad33 | 332 | chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr); |
d4a7e9bb DA |
333 | rcu_read_unlock(); |
334 | ||
83ba4645 | 335 | if (!inet_can_nonlocal_bind(net, inet) && |
63d9950b VY |
336 | v4addr != htonl(INADDR_ANY) && |
337 | chk_addr_ret != RTN_LOCAL && | |
338 | chk_addr_ret != RTN_MULTICAST && | |
ca6982b8 BP |
339 | chk_addr_ret != RTN_BROADCAST) { |
340 | err = -EADDRNOTAVAIL; | |
1da177e4 | 341 | goto out; |
ca6982b8 | 342 | } |
1da177e4 LT |
343 | } else { |
344 | if (addr_type != IPV6_ADDR_ANY) { | |
345 | struct net_device *dev = NULL; | |
346 | ||
16ba5e8e | 347 | rcu_read_lock(); |
842df073 | 348 | if (__ipv6_addr_needs_scope_id(addr_type)) { |
1da177e4 LT |
349 | if (addr_len >= sizeof(struct sockaddr_in6) && |
350 | addr->sin6_scope_id) { | |
351 | /* Override any existing binding, if another one | |
352 | * is supplied by user. | |
353 | */ | |
354 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
355 | } | |
1ab1457c | 356 | |
1da177e4 LT |
357 | /* Binding to link-local address requires an interface */ |
358 | if (!sk->sk_bound_dev_if) { | |
359 | err = -EINVAL; | |
16ba5e8e | 360 | goto out_unlock; |
1da177e4 | 361 | } |
c5ee0663 DA |
362 | } |
363 | ||
364 | if (sk->sk_bound_dev_if) { | |
16ba5e8e | 365 | dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); |
1da177e4 LT |
366 | if (!dev) { |
367 | err = -ENODEV; | |
16ba5e8e | 368 | goto out_unlock; |
1da177e4 LT |
369 | } |
370 | } | |
371 | ||
372 | /* ipv4 addr of the socket is invalid. Only the | |
373 | * unspecified and mapped address have a v4 equivalent. | |
374 | */ | |
375 | v4addr = LOOPBACK4_IPV6; | |
376 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
83ba4645 | 377 | if (!ipv6_can_nonlocal_bind(net, inet) && |
0a513f6a | 378 | !ipv6_chk_addr(net, &addr->sin6_addr, |
bfeade08 | 379 | dev, 0)) { |
1da177e4 | 380 | err = -EADDRNOTAVAIL; |
16ba5e8e | 381 | goto out_unlock; |
1da177e4 LT |
382 | } |
383 | } | |
16ba5e8e | 384 | rcu_read_unlock(); |
1da177e4 LT |
385 | } |
386 | } | |
387 | ||
c720c7e8 ED |
388 | inet->inet_rcv_saddr = v4addr; |
389 | inet->inet_saddr = v4addr; | |
1da177e4 | 390 | |
efe4208f | 391 | sk->sk_v6_rcv_saddr = addr->sin6_addr; |
1ab1457c | 392 | |
1da177e4 | 393 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
4e3fd7a0 | 394 | np->saddr = addr->sin6_addr; |
1da177e4 | 395 | |
7ece54a6 MKL |
396 | saved_ipv6only = sk->sk_ipv6only; |
397 | if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED) | |
398 | sk->sk_ipv6only = 1; | |
399 | ||
1da177e4 | 400 | /* Make sure we are allowed to bind here. */ |
aac3fc32 AI |
401 | if (snum || !(inet->bind_address_no_port || |
402 | force_bind_address_no_port)) { | |
403 | if (sk->sk_prot->get_port(sk, snum)) { | |
404 | sk->sk_ipv6only = saved_ipv6only; | |
405 | inet_reset_saddr(sk); | |
406 | err = -EADDRINUSE; | |
407 | goto out; | |
408 | } | |
409 | err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk); | |
410 | if (err) { | |
411 | sk->sk_ipv6only = saved_ipv6only; | |
412 | inet_reset_saddr(sk); | |
413 | goto out; | |
414 | } | |
1da177e4 LT |
415 | } |
416 | ||
7ece54a6 | 417 | if (addr_type != IPV6_ADDR_ANY) |
1da177e4 LT |
418 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
419 | if (snum) | |
420 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
c720c7e8 ED |
421 | inet->inet_sport = htons(inet->inet_num); |
422 | inet->inet_dport = 0; | |
423 | inet->inet_daddr = 0; | |
1da177e4 | 424 | out: |
3679d585 AI |
425 | if (with_lock) |
426 | release_sock(sk); | |
1da177e4 | 427 | return err; |
16ba5e8e ED |
428 | out_unlock: |
429 | rcu_read_unlock(); | |
430 | goto out; | |
1da177e4 | 431 | } |
7159039a | 432 | |
032234d8 DA |
433 | /* bind for INET6 API */ |
434 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
435 | { | |
436 | struct sock *sk = sock->sk; | |
437 | int err = 0; | |
438 | ||
439 | /* If the socket has its own bind function then use it. */ | |
440 | if (sk->sk_prot->bind) | |
441 | return sk->sk_prot->bind(sk, uaddr, addr_len); | |
442 | ||
443 | if (addr_len < SIN6_LEN_RFC2133) | |
444 | return -EINVAL; | |
445 | ||
446 | /* BPF prog is run before any checks are done so that if the prog | |
447 | * changes context in a wrong way it will be caught. | |
448 | */ | |
449 | err = BPF_CGROUP_RUN_PROG_INET6_BIND(sk, uaddr); | |
450 | if (err) | |
451 | return err; | |
452 | ||
453 | return __inet6_bind(sk, uaddr, addr_len, false, true); | |
454 | } | |
455 | EXPORT_SYMBOL(inet6_bind); | |
456 | ||
1da177e4 LT |
457 | int inet6_release(struct socket *sock) |
458 | { | |
459 | struct sock *sk = sock->sk; | |
460 | ||
63159f29 | 461 | if (!sk) |
1da177e4 LT |
462 | return -EINVAL; |
463 | ||
464 | /* Free mc lists */ | |
465 | ipv6_sock_mc_close(sk); | |
466 | ||
467 | /* Free ac lists */ | |
468 | ipv6_sock_ac_close(sk); | |
469 | ||
470 | return inet_release(sock); | |
471 | } | |
7159039a YH |
472 | EXPORT_SYMBOL(inet6_release); |
473 | ||
7d06b2e0 | 474 | void inet6_destroy_sock(struct sock *sk) |
1da177e4 LT |
475 | { |
476 | struct ipv6_pinfo *np = inet6_sk(sk); | |
477 | struct sk_buff *skb; | |
478 | struct ipv6_txoptions *opt; | |
479 | ||
1da177e4 LT |
480 | /* Release rx options */ |
481 | ||
647c0c70 | 482 | skb = xchg(&np->pktoptions, NULL); |
f2a2f216 | 483 | kfree_skb(skb); |
4b340ae2 | 484 | |
647c0c70 | 485 | skb = xchg(&np->rxpmtu, NULL); |
f2a2f216 | 486 | kfree_skb(skb); |
1da177e4 LT |
487 | |
488 | /* Free flowlabels */ | |
489 | fl6_free_socklist(sk); | |
490 | ||
491 | /* Free tx options */ | |
492 | ||
45f6fad8 ED |
493 | opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL); |
494 | if (opt) { | |
495 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
496 | txopt_put(opt); | |
497 | } | |
1da177e4 | 498 | } |
3cf3dc6c ACM |
499 | EXPORT_SYMBOL_GPL(inet6_destroy_sock); |
500 | ||
1da177e4 LT |
501 | /* |
502 | * This does both peername and sockname. | |
503 | */ | |
1ab1457c | 504 | |
1da177e4 | 505 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
9b2c45d4 | 506 | int peer) |
1da177e4 | 507 | { |
647c0c70 | 508 | struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr; |
1da177e4 LT |
509 | struct sock *sk = sock->sk; |
510 | struct inet_sock *inet = inet_sk(sk); | |
511 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1ab1457c | 512 | |
1da177e4 LT |
513 | sin->sin6_family = AF_INET6; |
514 | sin->sin6_flowinfo = 0; | |
515 | sin->sin6_scope_id = 0; | |
516 | if (peer) { | |
c720c7e8 | 517 | if (!inet->inet_dport) |
1da177e4 LT |
518 | return -ENOTCONN; |
519 | if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && | |
520 | peer == 1) | |
521 | return -ENOTCONN; | |
c720c7e8 | 522 | sin->sin6_port = inet->inet_dport; |
efe4208f | 523 | sin->sin6_addr = sk->sk_v6_daddr; |
1da177e4 LT |
524 | if (np->sndflow) |
525 | sin->sin6_flowinfo = np->flow_label; | |
526 | } else { | |
efe4208f | 527 | if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) |
4e3fd7a0 | 528 | sin->sin6_addr = np->saddr; |
1da177e4 | 529 | else |
efe4208f | 530 | sin->sin6_addr = sk->sk_v6_rcv_saddr; |
1da177e4 | 531 | |
c720c7e8 | 532 | sin->sin6_port = inet->inet_sport; |
1da177e4 | 533 | } |
842df073 HFS |
534 | sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr, |
535 | sk->sk_bound_dev_if); | |
9b2c45d4 | 536 | return sizeof(*sin); |
1da177e4 | 537 | } |
7159039a YH |
538 | EXPORT_SYMBOL(inet6_getname); |
539 | ||
1da177e4 LT |
540 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
541 | { | |
542 | struct sock *sk = sock->sk; | |
3b1e0a65 | 543 | struct net *net = sock_net(sk); |
1da177e4 | 544 | |
647c0c70 | 545 | switch (cmd) { |
1da177e4 LT |
546 | case SIOCADDRT: |
547 | case SIOCDELRT: | |
1ab1457c | 548 | |
a02cec21 | 549 | return ipv6_route_ioctl(net, cmd, (void __user *)arg); |
1da177e4 LT |
550 | |
551 | case SIOCSIFADDR: | |
af284937 | 552 | return addrconf_add_ifaddr(net, (void __user *) arg); |
1da177e4 | 553 | case SIOCDIFADDR: |
af284937 | 554 | return addrconf_del_ifaddr(net, (void __user *) arg); |
1da177e4 | 555 | case SIOCSIFDSTADDR: |
af284937 | 556 | return addrconf_set_dstaddr(net, (void __user *) arg); |
1da177e4 | 557 | default: |
b5e5fa5e CH |
558 | if (!sk->sk_prot->ioctl) |
559 | return -ENOIOCTLCMD; | |
560 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
1da177e4 LT |
561 | } |
562 | /*NOTREACHED*/ | |
a02cec21 | 563 | return 0; |
1da177e4 | 564 | } |
7159039a YH |
565 | EXPORT_SYMBOL(inet6_ioctl); |
566 | ||
164c51fe PA |
567 | INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *, |
568 | size_t)); | |
68ab5d14 PA |
569 | int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
570 | { | |
571 | struct sock *sk = sock->sk; | |
572 | ||
573 | if (unlikely(inet_send_prepare(sk))) | |
574 | return -EAGAIN; | |
575 | ||
164c51fe PA |
576 | return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udpv6_sendmsg, |
577 | sk, msg, size); | |
68ab5d14 PA |
578 | } |
579 | ||
164c51fe PA |
580 | INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *, |
581 | size_t, int, int, int *)); | |
68ab5d14 PA |
582 | int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
583 | int flags) | |
584 | { | |
585 | struct sock *sk = sock->sk; | |
586 | int addr_len = 0; | |
587 | int err; | |
588 | ||
589 | if (likely(!(flags & MSG_ERRQUEUE))) | |
590 | sock_rps_record_flow(sk); | |
591 | ||
164c51fe PA |
592 | err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udpv6_recvmsg, |
593 | sk, msg, size, flags & MSG_DONTWAIT, | |
594 | flags & ~MSG_DONTWAIT, &addr_len); | |
68ab5d14 PA |
595 | if (err >= 0) |
596 | msg->msg_namelen = addr_len; | |
597 | return err; | |
598 | } | |
599 | ||
90ddc4f0 | 600 | const struct proto_ops inet6_stream_ops = { |
543d9cfe ACM |
601 | .family = PF_INET6, |
602 | .owner = THIS_MODULE, | |
603 | .release = inet6_release, | |
604 | .bind = inet6_bind, | |
605 | .connect = inet_stream_connect, /* ok */ | |
606 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
607 | .accept = inet_accept, /* ok */ | |
608 | .getname = inet6_getname, | |
a11e1d43 | 609 | .poll = tcp_poll, /* ok */ |
543d9cfe | 610 | .ioctl = inet6_ioctl, /* must change */ |
c7cbdbf2 | 611 | .gettstamp = sock_gettstamp, |
543d9cfe ACM |
612 | .listen = inet_listen, /* ok */ |
613 | .shutdown = inet_shutdown, /* ok */ | |
614 | .setsockopt = sock_common_setsockopt, /* ok */ | |
615 | .getsockopt = sock_common_getsockopt, /* ok */ | |
68ab5d14 PA |
616 | .sendmsg = inet6_sendmsg, /* retpoline's sake */ |
617 | .recvmsg = inet6_recvmsg, /* retpoline's sake */ | |
05255b82 | 618 | #ifdef CONFIG_MMU |
93ab6cc6 | 619 | .mmap = tcp_mmap, |
05255b82 | 620 | #endif |
7ba42910 | 621 | .sendpage = inet_sendpage, |
45f91bdc JF |
622 | .sendmsg_locked = tcp_sendmsg_locked, |
623 | .sendpage_locked = tcp_sendpage_locked, | |
a0974dd3 | 624 | .splice_read = tcp_splice_read, |
32035585 TH |
625 | .read_sock = tcp_read_sock, |
626 | .peek_len = tcp_peek_len, | |
3fdadf7d | 627 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
628 | .compat_setsockopt = compat_sock_common_setsockopt, |
629 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 630 | #endif |
d1361840 | 631 | .set_rcvlowat = tcp_set_rcvlowat, |
1da177e4 LT |
632 | }; |
633 | ||
90ddc4f0 | 634 | const struct proto_ops inet6_dgram_ops = { |
543d9cfe ACM |
635 | .family = PF_INET6, |
636 | .owner = THIS_MODULE, | |
637 | .release = inet6_release, | |
638 | .bind = inet6_bind, | |
639 | .connect = inet_dgram_connect, /* ok */ | |
640 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
641 | .accept = sock_no_accept, /* a do nothing */ | |
642 | .getname = inet6_getname, | |
a11e1d43 | 643 | .poll = udp_poll, /* ok */ |
543d9cfe | 644 | .ioctl = inet6_ioctl, /* must change */ |
c7cbdbf2 | 645 | .gettstamp = sock_gettstamp, |
543d9cfe ACM |
646 | .listen = sock_no_listen, /* ok */ |
647 | .shutdown = inet_shutdown, /* ok */ | |
648 | .setsockopt = sock_common_setsockopt, /* ok */ | |
649 | .getsockopt = sock_common_getsockopt, /* ok */ | |
68ab5d14 PA |
650 | .sendmsg = inet6_sendmsg, /* retpoline's sake */ |
651 | .recvmsg = inet6_recvmsg, /* retpoline's sake */ | |
543d9cfe ACM |
652 | .mmap = sock_no_mmap, |
653 | .sendpage = sock_no_sendpage, | |
627d2d6b | 654 | .set_peek_off = sk_set_peek_off, |
3fdadf7d | 655 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
656 | .compat_setsockopt = compat_sock_common_setsockopt, |
657 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 658 | #endif |
1da177e4 LT |
659 | }; |
660 | ||
ec1b4cf7 | 661 | static const struct net_proto_family inet6_family_ops = { |
1da177e4 LT |
662 | .family = PF_INET6, |
663 | .create = inet6_create, | |
664 | .owner = THIS_MODULE, | |
665 | }; | |
666 | ||
87c3efbf | 667 | int inet6_register_protosw(struct inet_protosw *p) |
1da177e4 LT |
668 | { |
669 | struct list_head *lh; | |
670 | struct inet_protosw *answer; | |
1da177e4 | 671 | struct list_head *last_perm; |
87c3efbf DL |
672 | int protocol = p->protocol; |
673 | int ret; | |
1da177e4 LT |
674 | |
675 | spin_lock_bh(&inetsw6_lock); | |
676 | ||
87c3efbf | 677 | ret = -EINVAL; |
1da177e4 LT |
678 | if (p->type >= SOCK_MAX) |
679 | goto out_illegal; | |
680 | ||
681 | /* If we are trying to override a permanent protocol, bail. */ | |
682 | answer = NULL; | |
87c3efbf | 683 | ret = -EPERM; |
1da177e4 LT |
684 | last_perm = &inetsw6[p->type]; |
685 | list_for_each(lh, &inetsw6[p->type]) { | |
686 | answer = list_entry(lh, struct inet_protosw, list); | |
687 | ||
688 | /* Check only the non-wild match. */ | |
689 | if (INET_PROTOSW_PERMANENT & answer->flags) { | |
690 | if (protocol == answer->protocol) | |
691 | break; | |
692 | last_perm = lh; | |
693 | } | |
694 | ||
695 | answer = NULL; | |
696 | } | |
697 | if (answer) | |
698 | goto out_permanent; | |
699 | ||
700 | /* Add the new entry after the last permanent entry if any, so that | |
701 | * the new entry does not override a permanent entry when matched with | |
702 | * a wild-card protocol. But it is allowed to override any existing | |
1ab1457c | 703 | * non-permanent entry. This means that when we remove this entry, the |
1da177e4 LT |
704 | * system automatically returns to the old behavior. |
705 | */ | |
706 | list_add_rcu(&p->list, last_perm); | |
87c3efbf | 707 | ret = 0; |
1da177e4 LT |
708 | out: |
709 | spin_unlock_bh(&inetsw6_lock); | |
87c3efbf | 710 | return ret; |
1da177e4 LT |
711 | |
712 | out_permanent: | |
f3213831 | 713 | pr_err("Attempt to override permanent protocol %d\n", protocol); |
1da177e4 LT |
714 | goto out; |
715 | ||
716 | out_illegal: | |
f3213831 | 717 | pr_err("Ignoring attempt to register invalid socket type %d\n", |
1da177e4 LT |
718 | p->type); |
719 | goto out; | |
720 | } | |
7159039a YH |
721 | EXPORT_SYMBOL(inet6_register_protosw); |
722 | ||
1da177e4 LT |
723 | void |
724 | inet6_unregister_protosw(struct inet_protosw *p) | |
725 | { | |
726 | if (INET_PROTOSW_PERMANENT & p->flags) { | |
f3213831 | 727 | pr_err("Attempt to unregister permanent protocol %d\n", |
1da177e4 LT |
728 | p->protocol); |
729 | } else { | |
730 | spin_lock_bh(&inetsw6_lock); | |
731 | list_del_rcu(&p->list); | |
732 | spin_unlock_bh(&inetsw6_lock); | |
733 | ||
734 | synchronize_net(); | |
735 | } | |
736 | } | |
7159039a YH |
737 | EXPORT_SYMBOL(inet6_unregister_protosw); |
738 | ||
b9750ce1 ACM |
739 | int inet6_sk_rebuild_header(struct sock *sk) |
740 | { | |
b9750ce1 | 741 | struct ipv6_pinfo *np = inet6_sk(sk); |
68d0c6d3 | 742 | struct dst_entry *dst; |
b9750ce1 ACM |
743 | |
744 | dst = __sk_dst_check(sk, np->dst_cookie); | |
745 | ||
63159f29 | 746 | if (!dst) { |
b9750ce1 | 747 | struct inet_sock *inet = inet_sk(sk); |
20c59de2 | 748 | struct in6_addr *final_p, final; |
4c9483b2 DM |
749 | struct flowi6 fl6; |
750 | ||
751 | memset(&fl6, 0, sizeof(fl6)); | |
752 | fl6.flowi6_proto = sk->sk_protocol; | |
efe4208f | 753 | fl6.daddr = sk->sk_v6_daddr; |
4e3fd7a0 | 754 | fl6.saddr = np->saddr; |
4c9483b2 DM |
755 | fl6.flowlabel = np->flow_label; |
756 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
757 | fl6.flowi6_mark = sk->sk_mark; | |
1958b856 DM |
758 | fl6.fl6_dport = inet->inet_dport; |
759 | fl6.fl6_sport = inet->inet_sport; | |
e2d118a1 | 760 | fl6.flowi6_uid = sk->sk_uid; |
4c9483b2 DM |
761 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
762 | ||
45f6fad8 ED |
763 | rcu_read_lock(); |
764 | final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt), | |
765 | &final); | |
766 | rcu_read_unlock(); | |
4c9483b2 | 767 | |
0e0d44ab | 768 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p); |
68d0c6d3 | 769 | if (IS_ERR(dst)) { |
b9750ce1 | 770 | sk->sk_route_caps = 0; |
68d0c6d3 DM |
771 | sk->sk_err_soft = -PTR_ERR(dst); |
772 | return PTR_ERR(dst); | |
b9750ce1 ACM |
773 | } |
774 | ||
6bd4f355 | 775 | ip6_dst_store(sk, dst, NULL, NULL); |
b9750ce1 ACM |
776 | } |
777 | ||
778 | return 0; | |
779 | } | |
b9750ce1 ACM |
780 | EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); |
781 | ||
a224772d ED |
782 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
783 | const struct inet6_skb_parm *opt) | |
399c07de | 784 | { |
92113bfd | 785 | const struct ipv6_pinfo *np = inet6_sk(sk); |
399c07de ACM |
786 | |
787 | if (np->rxopt.all) { | |
8b58a398 FW |
788 | if (((opt->flags & IP6SKB_HOPBYHOP) && |
789 | (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) || | |
ac1eabca | 790 | (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) && |
399c07de ACM |
791 | np->rxopt.bits.rxflow) || |
792 | (opt->srcrt && (np->rxopt.bits.srcrt || | |
793 | np->rxopt.bits.osrcrt)) || | |
794 | ((opt->dst1 || opt->dst0) && | |
795 | (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) | |
92113bfd | 796 | return true; |
399c07de | 797 | } |
92113bfd | 798 | return false; |
399c07de | 799 | } |
399c07de ACM |
800 | EXPORT_SYMBOL_GPL(ipv6_opt_accepted); |
801 | ||
7546dd97 | 802 | static struct packet_type ipv6_packet_type __read_mostly = { |
09640e63 | 803 | .type = cpu_to_be16(ETH_P_IPV6), |
662397fd | 804 | .func = ipv6_rcv, |
d8269e2c | 805 | .list_func = ipv6_list_rcv, |
22061d80 VY |
806 | }; |
807 | ||
662397fd YH |
808 | static int __init ipv6_packet_init(void) |
809 | { | |
810 | dev_add_pack(&ipv6_packet_type); | |
811 | return 0; | |
812 | } | |
813 | ||
814 | static void ipv6_packet_cleanup(void) | |
815 | { | |
816 | dev_remove_pack(&ipv6_packet_type); | |
817 | } | |
818 | ||
e43291cb DL |
819 | static int __net_init ipv6_init_mibs(struct net *net) |
820 | { | |
827da44c JS |
821 | int i; |
822 | ||
698365fa WC |
823 | net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib); |
824 | if (!net->mib.udp_stats_in6) | |
0c7ed677 | 825 | return -ENOMEM; |
698365fa WC |
826 | net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib); |
827 | if (!net->mib.udplite_stats_in6) | |
be713a44 | 828 | goto err_udplite_mib; |
698365fa WC |
829 | net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib); |
830 | if (!net->mib.ipv6_statistics) | |
9261e537 | 831 | goto err_ip_mib; |
827da44c JS |
832 | |
833 | for_each_possible_cpu(i) { | |
834 | struct ipstats_mib *af_inet6_stats; | |
698365fa | 835 | af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i); |
827da44c | 836 | u64_stats_init(&af_inet6_stats->syncp); |
827da44c JS |
837 | } |
838 | ||
839 | ||
698365fa WC |
840 | net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib); |
841 | if (!net->mib.icmpv6_statistics) | |
9261e537 | 842 | goto err_icmp_mib; |
2a24444f ED |
843 | net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib), |
844 | GFP_KERNEL); | |
845 | if (!net->mib.icmpv6msg_statistics) | |
9261e537 | 846 | goto err_icmpmsg_mib; |
e43291cb | 847 | return 0; |
be713a44 | 848 | |
9261e537 | 849 | err_icmpmsg_mib: |
698365fa | 850 | free_percpu(net->mib.icmpv6_statistics); |
9261e537 | 851 | err_icmp_mib: |
698365fa | 852 | free_percpu(net->mib.ipv6_statistics); |
9261e537 | 853 | err_ip_mib: |
698365fa | 854 | free_percpu(net->mib.udplite_stats_in6); |
be713a44 | 855 | err_udplite_mib: |
698365fa | 856 | free_percpu(net->mib.udp_stats_in6); |
be713a44 | 857 | return -ENOMEM; |
e43291cb DL |
858 | } |
859 | ||
2c8c1e72 | 860 | static void ipv6_cleanup_mibs(struct net *net) |
e43291cb | 861 | { |
698365fa WC |
862 | free_percpu(net->mib.udp_stats_in6); |
863 | free_percpu(net->mib.udplite_stats_in6); | |
864 | free_percpu(net->mib.ipv6_statistics); | |
865 | free_percpu(net->mib.icmpv6_statistics); | |
2a24444f | 866 | kfree(net->mib.icmpv6msg_statistics); |
e43291cb DL |
867 | } |
868 | ||
e7dc8494 | 869 | static int __net_init inet6_net_init(struct net *net) |
81c1c178 | 870 | { |
0c96d8c5 DL |
871 | int err = 0; |
872 | ||
99bc9c4e | 873 | net->ipv6.sysctl.bindv6only = 0; |
41a76906 | 874 | net->ipv6.sysctl.icmpv6_time = 1*HZ; |
e6f86b0f | 875 | net->ipv6.sysctl.icmpv6_echo_ignore_all = 0; |
03f1eccc | 876 | net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0; |
0b03a5ca | 877 | net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0; |
0bc19985 SS |
878 | |
879 | /* By default, rate limit error messages. | |
880 | * Except for pmtu discovery, it would break it. | |
881 | * proc_do_large_bitmap needs pointer to the bitmap. | |
882 | */ | |
883 | bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1); | |
884 | bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1); | |
885 | net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask; | |
886 | ||
6444f72b | 887 | net->ipv6.sysctl.flowlabel_consistency = 1; |
42240901 | 888 | net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS; |
1855b7c3 HFS |
889 | net->ipv6.sysctl.idgen_retries = 3; |
890 | net->ipv6.sysctl.idgen_delay = 1 * HZ; | |
be26849b | 891 | net->ipv6.sysctl.flowlabel_state_ranges = 0; |
47d3d7ac TH |
892 | net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT; |
893 | net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT; | |
894 | net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN; | |
895 | net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN; | |
812918c4 | 896 | atomic_set(&net->ipv6.fib6_sernum, 1); |
e71e0349 | 897 | |
e43291cb DL |
898 | err = ipv6_init_mibs(net); |
899 | if (err) | |
900 | return err; | |
0c96d8c5 DL |
901 | #ifdef CONFIG_PROC_FS |
902 | err = udp6_proc_init(net); | |
903 | if (err) | |
904 | goto out; | |
6f8b13bc DL |
905 | err = tcp6_proc_init(net); |
906 | if (err) | |
907 | goto proc_tcp6_fail; | |
6ab57e7e DL |
908 | err = ac6_proc_init(net); |
909 | if (err) | |
910 | goto proc_ac6_fail; | |
0c96d8c5 DL |
911 | #endif |
912 | return err; | |
6f8b13bc DL |
913 | |
914 | #ifdef CONFIG_PROC_FS | |
6ab57e7e DL |
915 | proc_ac6_fail: |
916 | tcp6_proc_exit(net); | |
6f8b13bc DL |
917 | proc_tcp6_fail: |
918 | udp6_proc_exit(net); | |
e43291cb DL |
919 | out: |
920 | ipv6_cleanup_mibs(net); | |
921 | return err; | |
6f8b13bc | 922 | #endif |
81c1c178 DL |
923 | } |
924 | ||
2c8c1e72 | 925 | static void __net_exit inet6_net_exit(struct net *net) |
81c1c178 | 926 | { |
0c96d8c5 DL |
927 | #ifdef CONFIG_PROC_FS |
928 | udp6_proc_exit(net); | |
6f8b13bc | 929 | tcp6_proc_exit(net); |
6ab57e7e | 930 | ac6_proc_exit(net); |
0c96d8c5 | 931 | #endif |
e43291cb | 932 | ipv6_cleanup_mibs(net); |
81c1c178 DL |
933 | } |
934 | ||
935 | static struct pernet_operations inet6_net_ops = { | |
936 | .init = inet6_net_init, | |
937 | .exit = inet6_net_exit, | |
938 | }; | |
939 | ||
9b0a6a9d PO |
940 | static int ipv6_route_input(struct sk_buff *skb) |
941 | { | |
942 | ip6_route_input(skb); | |
943 | return skb_dst(skb)->error; | |
944 | } | |
945 | ||
5f81bd2e CW |
946 | static const struct ipv6_stub ipv6_stub_impl = { |
947 | .ipv6_sock_mc_join = ipv6_sock_mc_join, | |
948 | .ipv6_sock_mc_drop = ipv6_sock_mc_drop, | |
65a2022e | 949 | .ipv6_dst_lookup = ip6_dst_lookup, |
9b0a6a9d | 950 | .ipv6_route_input = ipv6_route_input, |
65a2022e DA |
951 | .fib6_get_table = fib6_get_table, |
952 | .fib6_table_lookup = fib6_table_lookup, | |
953 | .fib6_lookup = fib6_lookup, | |
b1d40991 | 954 | .fib6_select_path = fib6_select_path, |
901731b8 | 955 | .ip6_mtu_from_fib6 = ip6_mtu_from_fib6, |
1aefd3de DA |
956 | .fib6_nh_init = fib6_nh_init, |
957 | .fib6_nh_release = fib6_nh_release, | |
cdaa16a4 | 958 | .fib6_update_sernum = fib6_update_sernum_stub, |
19a3b7ee | 959 | .fib6_rt_update = fib6_rt_update, |
68a9b13d | 960 | .ip6_del_rt = ip6_del_rt, |
5f81bd2e | 961 | .udpv6_encap_enable = udpv6_encap_enable, |
f564f45c | 962 | .ndisc_send_na = ndisc_send_na, |
e15a00aa | 963 | .nd_tbl = &nd_tbl, |
5f81bd2e CW |
964 | }; |
965 | ||
d74bad4e AI |
966 | static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = { |
967 | .inet6_bind = __inet6_bind, | |
8a615c6b | 968 | .udp6_lib_lookup = __udp6_lib_lookup, |
d74bad4e AI |
969 | }; |
970 | ||
1da177e4 LT |
971 | static int __init inet6_init(void) |
972 | { | |
1ab1457c | 973 | struct list_head *r; |
fe7ca2e1 | 974 | int err = 0; |
1da177e4 | 975 | |
b4772ef8 | 976 | sock_skb_cb_check_size(sizeof(struct inet6_skb_parm)); |
ef047f5e | 977 | |
fe7ca2e1 | 978 | /* Register the socket-side information for inet6_create. */ |
647c0c70 | 979 | for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) |
fe7ca2e1 BH |
980 | INIT_LIST_HEAD(r); |
981 | ||
56d417b1 | 982 | if (disable_ipv6_mod) { |
f3213831 | 983 | pr_info("Loaded, but administratively disabled, reboot required to enable\n"); |
fe7ca2e1 BH |
984 | goto out; |
985 | } | |
986 | ||
1da177e4 LT |
987 | err = proto_register(&tcpv6_prot, 1); |
988 | if (err) | |
989 | goto out; | |
990 | ||
991 | err = proto_register(&udpv6_prot, 1); | |
992 | if (err) | |
993 | goto out_unregister_tcp_proto; | |
994 | ||
ba4e58ec | 995 | err = proto_register(&udplitev6_prot, 1); |
1da177e4 LT |
996 | if (err) |
997 | goto out_unregister_udp_proto; | |
998 | ||
ba4e58ec GR |
999 | err = proto_register(&rawv6_prot, 1); |
1000 | if (err) | |
1001 | goto out_unregister_udplite_proto; | |
1002 | ||
6d0bfe22 LC |
1003 | err = proto_register(&pingv6_prot, 1); |
1004 | if (err) | |
a03dc36b | 1005 | goto out_unregister_raw_proto; |
1da177e4 | 1006 | |
1da177e4 LT |
1007 | /* We MUST register RAW sockets before we create the ICMP6, |
1008 | * IGMP6, or NDISC control sockets. | |
1009 | */ | |
7f4e4868 DL |
1010 | err = rawv6_init(); |
1011 | if (err) | |
a03dc36b | 1012 | goto out_unregister_ping_proto; |
1da177e4 LT |
1013 | |
1014 | /* Register the family here so that the init calls below will | |
1015 | * be able to create sockets. (?? is this dangerous ??) | |
1016 | */ | |
8eb55910 DM |
1017 | err = sock_register(&inet6_family_ops); |
1018 | if (err) | |
7f4e4868 | 1019 | goto out_sock_register_fail; |
1da177e4 | 1020 | |
1da177e4 LT |
1021 | /* |
1022 | * ipngwg API draft makes clear that the correct semantics | |
1023 | * for TCP and UDP is to consider one TCP and UDP instance | |
25985edc | 1024 | * in a host available by both INET and INET6 APIs and |
1da177e4 LT |
1025 | * able to communicate via both network protocols. |
1026 | */ | |
1027 | ||
81c1c178 DL |
1028 | err = register_pernet_subsys(&inet6_net_ops); |
1029 | if (err) | |
1030 | goto register_pernet_fail; | |
623d1a1a WC |
1031 | err = ip6_mr_init(); |
1032 | if (err) | |
1033 | goto ipmr_fail; | |
15e66807 WC |
1034 | err = icmpv6_init(); |
1035 | if (err) | |
1036 | goto icmp_fail; | |
9b0f976f | 1037 | err = ndisc_init(); |
1da177e4 LT |
1038 | if (err) |
1039 | goto ndisc_fail; | |
9b0f976f | 1040 | err = igmp6_init(); |
1da177e4 LT |
1041 | if (err) |
1042 | goto igmp_fail; | |
5f81bd2e | 1043 | |
2cc7d573 HW |
1044 | err = ipv6_netfilter_init(); |
1045 | if (err) | |
1046 | goto netfilter_fail; | |
1da177e4 LT |
1047 | /* Create /proc/foo6 entries. */ |
1048 | #ifdef CONFIG_PROC_FS | |
1049 | err = -ENOMEM; | |
1050 | if (raw6_proc_init()) | |
1051 | goto proc_raw6_fail; | |
ba4e58ec GR |
1052 | if (udplite6_proc_init()) |
1053 | goto proc_udplite6_fail; | |
1da177e4 LT |
1054 | if (ipv6_misc_proc_init()) |
1055 | goto proc_misc6_fail; | |
1da177e4 LT |
1056 | if (if6_proc_init()) |
1057 | goto proc_if6_fail; | |
1058 | #endif | |
e2fddf5e DL |
1059 | err = ip6_route_init(); |
1060 | if (err) | |
1061 | goto ip6_route_fail; | |
2c861cc6 MK |
1062 | err = ndisc_late_init(); |
1063 | if (err) | |
1064 | goto ndisc_late_fail; | |
0a3e78ac DL |
1065 | err = ip6_flowlabel_init(); |
1066 | if (err) | |
1067 | goto ip6_flowlabel_fail; | |
2384d025 JB |
1068 | err = ipv6_anycast_init(); |
1069 | if (err) | |
1070 | goto ipv6_anycast_fail; | |
1da177e4 LT |
1071 | err = addrconf_init(); |
1072 | if (err) | |
1073 | goto addrconf_fail; | |
1da177e4 LT |
1074 | |
1075 | /* Init v6 extension headers. */ | |
248b238d DL |
1076 | err = ipv6_exthdrs_init(); |
1077 | if (err) | |
1078 | goto ipv6_exthdrs_fail; | |
1079 | ||
853cbbaa DL |
1080 | err = ipv6_frag_init(); |
1081 | if (err) | |
1082 | goto ipv6_frag_fail; | |
1da177e4 LT |
1083 | |
1084 | /* Init v6 transport protocols. */ | |
7f4e4868 DL |
1085 | err = udpv6_init(); |
1086 | if (err) | |
1087 | goto udpv6_fail; | |
e2ed4052 | 1088 | |
7f4e4868 DL |
1089 | err = udplitev6_init(); |
1090 | if (err) | |
1091 | goto udplitev6_fail; | |
1092 | ||
a6024562 TH |
1093 | err = udpv6_offload_init(); |
1094 | if (err) | |
1095 | goto udpv6_offload_fail; | |
1096 | ||
7f4e4868 DL |
1097 | err = tcpv6_init(); |
1098 | if (err) | |
1099 | goto tcpv6_fail; | |
1100 | ||
1101 | err = ipv6_packet_init(); | |
1102 | if (err) | |
1103 | goto ipv6_packet_fail; | |
94911fe3 | 1104 | |
6d0bfe22 LC |
1105 | err = pingv6_init(); |
1106 | if (err) | |
1107 | goto pingv6_fail; | |
1108 | ||
cb72d382 HD |
1109 | err = calipso_init(); |
1110 | if (err) | |
1111 | goto calipso_fail; | |
1112 | ||
915d7e5e DL |
1113 | err = seg6_init(); |
1114 | if (err) | |
1115 | goto seg6_fail; | |
1116 | ||
382ed724 VY |
1117 | err = igmp6_late_init(); |
1118 | if (err) | |
1119 | goto igmp6_late_err; | |
1120 | ||
94911fe3 BT |
1121 | #ifdef CONFIG_SYSCTL |
1122 | err = ipv6_sysctl_register(); | |
1123 | if (err) | |
1124 | goto sysctl_fail; | |
1125 | #endif | |
b7d6df57 PA |
1126 | |
1127 | /* ensure that ipv6 stubs are visible only after ipv6 is ready */ | |
1128 | wmb(); | |
1129 | ipv6_stub = &ipv6_stub_impl; | |
d74bad4e | 1130 | ipv6_bpf_stub = &ipv6_bpf_stub_impl; |
1da177e4 LT |
1131 | out: |
1132 | return err; | |
1133 | ||
94911fe3 BT |
1134 | #ifdef CONFIG_SYSCTL |
1135 | sysctl_fail: | |
382ed724 | 1136 | igmp6_late_cleanup(); |
94911fe3 | 1137 | #endif |
382ed724 VY |
1138 | igmp6_late_err: |
1139 | seg6_exit(); | |
915d7e5e DL |
1140 | seg6_fail: |
1141 | calipso_exit(); | |
cb72d382 HD |
1142 | calipso_fail: |
1143 | pingv6_exit(); | |
6d0bfe22 | 1144 | pingv6_fail: |
eca42aaf | 1145 | ipv6_packet_cleanup(); |
7f4e4868 DL |
1146 | ipv6_packet_fail: |
1147 | tcpv6_exit(); | |
1148 | tcpv6_fail: | |
a6024562 TH |
1149 | udpv6_offload_exit(); |
1150 | udpv6_offload_fail: | |
7f4e4868 DL |
1151 | udplitev6_exit(); |
1152 | udplitev6_fail: | |
1153 | udpv6_exit(); | |
1154 | udpv6_fail: | |
1155 | ipv6_frag_exit(); | |
853cbbaa DL |
1156 | ipv6_frag_fail: |
1157 | ipv6_exthdrs_exit(); | |
248b238d DL |
1158 | ipv6_exthdrs_fail: |
1159 | addrconf_cleanup(); | |
1da177e4 | 1160 | addrconf_fail: |
2384d025 JB |
1161 | ipv6_anycast_cleanup(); |
1162 | ipv6_anycast_fail: | |
1da177e4 | 1163 | ip6_flowlabel_cleanup(); |
0a3e78ac | 1164 | ip6_flowlabel_fail: |
2c861cc6 MK |
1165 | ndisc_late_cleanup(); |
1166 | ndisc_late_fail: | |
1da177e4 | 1167 | ip6_route_cleanup(); |
e2fddf5e | 1168 | ip6_route_fail: |
1da177e4 LT |
1169 | #ifdef CONFIG_PROC_FS |
1170 | if6_proc_exit(); | |
1171 | proc_if6_fail: | |
1da177e4 LT |
1172 | ipv6_misc_proc_exit(); |
1173 | proc_misc6_fail: | |
ba4e58ec GR |
1174 | udplite6_proc_exit(); |
1175 | proc_udplite6_fail: | |
1da177e4 LT |
1176 | raw6_proc_exit(); |
1177 | proc_raw6_fail: | |
1178 | #endif | |
2cc7d573 HW |
1179 | ipv6_netfilter_fini(); |
1180 | netfilter_fail: | |
1da177e4 LT |
1181 | igmp6_cleanup(); |
1182 | igmp_fail: | |
1183 | ndisc_cleanup(); | |
1184 | ndisc_fail: | |
afe49de4 | 1185 | icmpv6_cleanup(); |
1da177e4 | 1186 | icmp_fail: |
afe49de4 | 1187 | ip6_mr_cleanup(); |
15e66807 | 1188 | ipmr_fail: |
afe49de4 | 1189 | unregister_pernet_subsys(&inet6_net_ops); |
81c1c178 | 1190 | register_pernet_fail: |
8eb55910 | 1191 | sock_unregister(PF_INET6); |
e2fddf5e | 1192 | rtnl_unregister_all(PF_INET6); |
7f4e4868 DL |
1193 | out_sock_register_fail: |
1194 | rawv6_exit(); | |
6d0bfe22 LC |
1195 | out_unregister_ping_proto: |
1196 | proto_unregister(&pingv6_prot); | |
1da177e4 LT |
1197 | out_unregister_raw_proto: |
1198 | proto_unregister(&rawv6_prot); | |
ba4e58ec GR |
1199 | out_unregister_udplite_proto: |
1200 | proto_unregister(&udplitev6_prot); | |
1da177e4 LT |
1201 | out_unregister_udp_proto: |
1202 | proto_unregister(&udpv6_prot); | |
1203 | out_unregister_tcp_proto: | |
1204 | proto_unregister(&tcpv6_prot); | |
1205 | goto out; | |
1206 | } | |
1207 | module_init(inet6_init); | |
1208 | ||
1da177e4 | 1209 | MODULE_ALIAS_NETPROTO(PF_INET6); |