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Commit | Line | Data |
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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> |
a7a29f9c | 62 | #include <net/rpl.h> |
3986912f | 63 | #include <net/compat.h> |
0146dca7 | 64 | #include <net/xfrm.h> |
9ee11f0f | 65 | #include <net/ioam6.h> |
1da177e4 | 66 | |
7c0f6ba6 | 67 | #include <linux/uaccess.h> |
7bc570c8 | 68 | #include <linux/mroute6.h> |
1da177e4 | 69 | |
a6024562 TH |
70 | #include "ip6_offload.h" |
71 | ||
1da177e4 LT |
72 | MODULE_AUTHOR("Cast of dozens"); |
73 | MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); | |
74 | MODULE_LICENSE("GPL"); | |
75 | ||
f1267347 | 76 | /* The inetsw6 table contains everything that inet6_create needs to |
1da177e4 LT |
77 | * build a new socket. |
78 | */ | |
79 | static struct list_head inetsw6[SOCK_MAX]; | |
80 | static DEFINE_SPINLOCK(inetsw6_lock); | |
81 | ||
56d417b1 BH |
82 | struct ipv6_params ipv6_defaults = { |
83 | .disable_ipv6 = 0, | |
84 | .autoconf = 1, | |
85 | }; | |
86 | ||
647c0c70 | 87 | static int disable_ipv6_mod; |
56d417b1 BH |
88 | |
89 | module_param_named(disable, disable_ipv6_mod, int, 0444); | |
90 | MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional"); | |
91 | ||
92 | module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444); | |
93 | MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces"); | |
94 | ||
95 | module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444); | |
96 | MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces"); | |
fe7ca2e1 | 97 | |
e4348637 DA |
98 | bool ipv6_mod_enabled(void) |
99 | { | |
100 | return disable_ipv6_mod == 0; | |
101 | } | |
102 | EXPORT_SYMBOL_GPL(ipv6_mod_enabled); | |
103 | ||
1da177e4 LT |
104 | static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) |
105 | { | |
106 | const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); | |
107 | ||
108 | return (struct ipv6_pinfo *)(((u8 *)sk) + offset); | |
109 | } | |
110 | ||
3f378b68 EP |
111 | static int inet6_create(struct net *net, struct socket *sock, int protocol, |
112 | int kern) | |
1da177e4 LT |
113 | { |
114 | struct inet_sock *inet; | |
115 | struct ipv6_pinfo *np; | |
116 | struct sock *sk; | |
1da177e4 LT |
117 | struct inet_protosw *answer; |
118 | struct proto *answer_prot; | |
119 | unsigned char answer_flags; | |
af1afe86 YH |
120 | int try_loading_module = 0; |
121 | int err; | |
1da177e4 | 122 | |
79462ad0 HFS |
123 | if (protocol < 0 || protocol >= IPPROTO_MAX) |
124 | return -EINVAL; | |
125 | ||
1da177e4 | 126 | /* Look for the requested type/protocol pair. */ |
af1afe86 YH |
127 | lookup_protocol: |
128 | err = -ESOCKTNOSUPPORT; | |
1da177e4 | 129 | rcu_read_lock(); |
696adfe8 | 130 | list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { |
1da177e4 | 131 | |
696adfe8 | 132 | err = 0; |
1da177e4 LT |
133 | /* Check the non-wild match. */ |
134 | if (protocol == answer->protocol) { | |
135 | if (protocol != IPPROTO_IP) | |
136 | break; | |
137 | } else { | |
138 | /* Check for the two wild cases. */ | |
139 | if (IPPROTO_IP == protocol) { | |
140 | protocol = answer->protocol; | |
141 | break; | |
142 | } | |
143 | if (IPPROTO_IP == answer->protocol) | |
144 | break; | |
145 | } | |
af1afe86 | 146 | err = -EPROTONOSUPPORT; |
1da177e4 LT |
147 | } |
148 | ||
696adfe8 | 149 | if (err) { |
af1afe86 YH |
150 | if (try_loading_module < 2) { |
151 | rcu_read_unlock(); | |
152 | /* | |
153 | * Be more specific, e.g. net-pf-10-proto-132-type-1 | |
154 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) | |
155 | */ | |
156 | if (++try_loading_module == 1) | |
157 | request_module("net-pf-%d-proto-%d-type-%d", | |
158 | PF_INET6, protocol, sock->type); | |
159 | /* | |
160 | * Fall back to generic, e.g. net-pf-10-proto-132 | |
161 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP) | |
162 | */ | |
163 | else | |
164 | request_module("net-pf-%d-proto-%d", | |
165 | PF_INET6, protocol); | |
166 | goto lookup_protocol; | |
167 | } else | |
168 | goto out_rcu_unlock; | |
169 | } | |
170 | ||
171 | err = -EPERM; | |
af31f412 EB |
172 | if (sock->type == SOCK_RAW && !kern && |
173 | !ns_capable(net->user_ns, CAP_NET_RAW)) | |
1da177e4 | 174 | goto out_rcu_unlock; |
1da177e4 LT |
175 | |
176 | sock->ops = answer->ops; | |
1da177e4 | 177 | answer_prot = answer->prot; |
1da177e4 LT |
178 | answer_flags = answer->flags; |
179 | rcu_read_unlock(); | |
180 | ||
63159f29 | 181 | WARN_ON(!answer_prot->slab); |
1da177e4 | 182 | |
af1afe86 | 183 | err = -ENOBUFS; |
11aa9c28 | 184 | sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern); |
63159f29 | 185 | if (!sk) |
1da177e4 LT |
186 | goto out; |
187 | ||
188 | sock_init_data(sock, sk); | |
189 | ||
af1afe86 | 190 | err = 0; |
1da177e4 | 191 | if (INET_PROTOSW_REUSE & answer_flags) |
4a17fd52 | 192 | sk->sk_reuse = SK_CAN_REUSE; |
1da177e4 LT |
193 | |
194 | inet = inet_sk(sk); | |
469de9b9 | 195 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
1da177e4 LT |
196 | |
197 | if (SOCK_RAW == sock->type) { | |
c720c7e8 | 198 | inet->inet_num = protocol; |
1da177e4 LT |
199 | if (IPPROTO_RAW == protocol) |
200 | inet->hdrincl = 1; | |
201 | } | |
202 | ||
e6848976 | 203 | sk->sk_destruct = inet_sock_destruct; |
1da177e4 LT |
204 | sk->sk_family = PF_INET6; |
205 | sk->sk_protocol = protocol; | |
206 | ||
207 | sk->sk_backlog_rcv = answer->prot->backlog_rcv; | |
208 | ||
209 | inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); | |
210 | np->hop_limit = -1; | |
f935aa9e | 211 | np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; |
1da177e4 | 212 | np->mc_loop = 1; |
15033f04 | 213 | np->mc_all = 1; |
1da177e4 | 214 | np->pmtudisc = IPV6_PMTUDISC_WANT; |
a346abe0 | 215 | np->repflow = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED; |
9fe516ba | 216 | sk->sk_ipv6only = net->ipv6.sysctl.bindv6only; |
1ab1457c | 217 | |
1da177e4 LT |
218 | /* Init the ipv4 part of the socket since we can have sockets |
219 | * using v6 API for ipv4. | |
220 | */ | |
221 | inet->uc_ttl = -1; | |
222 | ||
223 | inet->mc_loop = 1; | |
224 | inet->mc_ttl = 1; | |
225 | inet->mc_index = 0; | |
88e2ca30 | 226 | RCU_INIT_POINTER(inet->mc_list, NULL); |
4c507d28 | 227 | inet->rcv_tos = 0; |
1da177e4 | 228 | |
974eda11 | 229 | if (net->ipv4.sysctl_ip_no_pmtu_disc) |
1da177e4 LT |
230 | inet->pmtudisc = IP_PMTUDISC_DONT; |
231 | else | |
232 | inet->pmtudisc = IP_PMTUDISC_WANT; | |
1ab1457c | 233 | /* |
e6848976 ACM |
234 | * Increment only the relevant sk_prot->socks debug field, this changes |
235 | * the previous behaviour of incrementing both the equivalent to | |
236 | * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. | |
237 | * | |
238 | * This allows better debug granularity as we'll know exactly how many | |
239 | * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 | |
240 | * transport protocol socks. -acme | |
241 | */ | |
242 | sk_refcnt_debug_inc(sk); | |
1da177e4 | 243 | |
c720c7e8 | 244 | if (inet->inet_num) { |
1da177e4 LT |
245 | /* It assumes that any protocol which allows |
246 | * the user to assign a number at socket | |
247 | * creation time automatically shares. | |
248 | */ | |
c720c7e8 | 249 | inet->inet_sport = htons(inet->inet_num); |
086c653f CG |
250 | err = sk->sk_prot->hash(sk); |
251 | if (err) { | |
252 | sk_common_release(sk); | |
253 | goto out; | |
254 | } | |
1da177e4 LT |
255 | } |
256 | if (sk->sk_prot->init) { | |
af1afe86 YH |
257 | err = sk->sk_prot->init(sk); |
258 | if (err) { | |
1da177e4 LT |
259 | sk_common_release(sk); |
260 | goto out; | |
261 | } | |
262 | } | |
61023658 DA |
263 | |
264 | if (!kern) { | |
265 | err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk); | |
266 | if (err) { | |
267 | sk_common_release(sk); | |
268 | goto out; | |
269 | } | |
270 | } | |
1da177e4 | 271 | out: |
af1afe86 | 272 | return err; |
1da177e4 LT |
273 | out_rcu_unlock: |
274 | rcu_read_unlock(); | |
275 | goto out; | |
276 | } | |
277 | ||
032234d8 | 278 | static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len, |
cb0721c7 | 279 | u32 flags) |
3679d585 AI |
280 | { |
281 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr; | |
282 | struct inet_sock *inet = inet_sk(sk); | |
283 | struct ipv6_pinfo *np = inet6_sk(sk); | |
284 | struct net *net = sock_net(sk); | |
285 | __be32 v4addr = 0; | |
286 | unsigned short snum; | |
287 | bool saved_ipv6only; | |
288 | int addr_type = 0; | |
289 | int err = 0; | |
290 | ||
5a079c30 | 291 | if (addr->sin6_family != AF_INET6) |
c349a528 | 292 | return -EAFNOSUPPORT; |
5a079c30 | 293 | |
1da177e4 | 294 | addr_type = ipv6_addr_type(&addr->sin6_addr); |
3679d585 | 295 | if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM) |
1da177e4 LT |
296 | return -EINVAL; |
297 | ||
298 | snum = ntohs(addr->sin6_port); | |
77241217 SF |
299 | if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) && |
300 | snum && inet_port_requires_bind_service(net, snum) && | |
4548b683 | 301 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
1da177e4 LT |
302 | return -EACCES; |
303 | ||
cb0721c7 | 304 | if (flags & BIND_WITH_LOCK) |
3679d585 | 305 | lock_sock(sk); |
1da177e4 LT |
306 | |
307 | /* Check these errors (active socket, double bind). */ | |
c720c7e8 | 308 | if (sk->sk_state != TCP_CLOSE || inet->inet_num) { |
1da177e4 LT |
309 | err = -EINVAL; |
310 | goto out; | |
311 | } | |
312 | ||
313 | /* Check if the address belongs to the host. */ | |
314 | if (addr_type == IPV6_ADDR_MAPPED) { | |
ec90ad33 | 315 | struct net_device *dev = NULL; |
63d9950b VY |
316 | int chk_addr_ret; |
317 | ||
783ed5a7 VY |
318 | /* Binding to v4-mapped address on a v6-only socket |
319 | * makes no sense | |
320 | */ | |
9fe516ba | 321 | if (sk->sk_ipv6only) { |
783ed5a7 VY |
322 | err = -EINVAL; |
323 | goto out; | |
324 | } | |
63d9950b | 325 | |
d4a7e9bb | 326 | rcu_read_lock(); |
ec90ad33 DA |
327 | if (sk->sk_bound_dev_if) { |
328 | dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); | |
329 | if (!dev) { | |
330 | err = -ENODEV; | |
d4a7e9bb | 331 | goto out_unlock; |
ec90ad33 DA |
332 | } |
333 | } | |
334 | ||
a34f0b31 | 335 | /* Reproduce AF_INET checks to make the bindings consistent */ |
1da177e4 | 336 | v4addr = addr->sin6_addr.s6_addr32[3]; |
ec90ad33 | 337 | chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr); |
d4a7e9bb DA |
338 | rcu_read_unlock(); |
339 | ||
83ba4645 | 340 | if (!inet_can_nonlocal_bind(net, inet) && |
63d9950b VY |
341 | v4addr != htonl(INADDR_ANY) && |
342 | chk_addr_ret != RTN_LOCAL && | |
343 | chk_addr_ret != RTN_MULTICAST && | |
ca6982b8 BP |
344 | chk_addr_ret != RTN_BROADCAST) { |
345 | err = -EADDRNOTAVAIL; | |
1da177e4 | 346 | goto out; |
ca6982b8 | 347 | } |
1da177e4 LT |
348 | } else { |
349 | if (addr_type != IPV6_ADDR_ANY) { | |
350 | struct net_device *dev = NULL; | |
351 | ||
16ba5e8e | 352 | rcu_read_lock(); |
842df073 | 353 | if (__ipv6_addr_needs_scope_id(addr_type)) { |
1da177e4 LT |
354 | if (addr_len >= sizeof(struct sockaddr_in6) && |
355 | addr->sin6_scope_id) { | |
356 | /* Override any existing binding, if another one | |
357 | * is supplied by user. | |
358 | */ | |
359 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
360 | } | |
1ab1457c | 361 | |
1da177e4 LT |
362 | /* Binding to link-local address requires an interface */ |
363 | if (!sk->sk_bound_dev_if) { | |
364 | err = -EINVAL; | |
16ba5e8e | 365 | goto out_unlock; |
1da177e4 | 366 | } |
c5ee0663 DA |
367 | } |
368 | ||
369 | if (sk->sk_bound_dev_if) { | |
16ba5e8e | 370 | dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); |
1da177e4 LT |
371 | if (!dev) { |
372 | err = -ENODEV; | |
16ba5e8e | 373 | goto out_unlock; |
1da177e4 LT |
374 | } |
375 | } | |
376 | ||
377 | /* ipv4 addr of the socket is invalid. Only the | |
378 | * unspecified and mapped address have a v4 equivalent. | |
379 | */ | |
380 | v4addr = LOOPBACK4_IPV6; | |
381 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
83ba4645 | 382 | if (!ipv6_can_nonlocal_bind(net, inet) && |
0a513f6a | 383 | !ipv6_chk_addr(net, &addr->sin6_addr, |
bfeade08 | 384 | dev, 0)) { |
1da177e4 | 385 | err = -EADDRNOTAVAIL; |
16ba5e8e | 386 | goto out_unlock; |
1da177e4 LT |
387 | } |
388 | } | |
16ba5e8e | 389 | rcu_read_unlock(); |
1da177e4 LT |
390 | } |
391 | } | |
392 | ||
c720c7e8 ED |
393 | inet->inet_rcv_saddr = v4addr; |
394 | inet->inet_saddr = v4addr; | |
1da177e4 | 395 | |
efe4208f | 396 | sk->sk_v6_rcv_saddr = addr->sin6_addr; |
1ab1457c | 397 | |
1da177e4 | 398 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
4e3fd7a0 | 399 | np->saddr = addr->sin6_addr; |
1da177e4 | 400 | |
7ece54a6 MKL |
401 | saved_ipv6only = sk->sk_ipv6only; |
402 | if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED) | |
403 | sk->sk_ipv6only = 1; | |
404 | ||
1da177e4 | 405 | /* Make sure we are allowed to bind here. */ |
aac3fc32 | 406 | if (snum || !(inet->bind_address_no_port || |
cb0721c7 | 407 | (flags & BIND_FORCE_ADDRESS_NO_PORT))) { |
aac3fc32 AI |
408 | if (sk->sk_prot->get_port(sk, snum)) { |
409 | sk->sk_ipv6only = saved_ipv6only; | |
410 | inet_reset_saddr(sk); | |
411 | err = -EADDRINUSE; | |
412 | goto out; | |
413 | } | |
8086fbaf SF |
414 | if (!(flags & BIND_FROM_BPF)) { |
415 | err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk); | |
416 | if (err) { | |
417 | sk->sk_ipv6only = saved_ipv6only; | |
418 | inet_reset_saddr(sk); | |
419 | goto out; | |
420 | } | |
aac3fc32 | 421 | } |
1da177e4 LT |
422 | } |
423 | ||
7ece54a6 | 424 | if (addr_type != IPV6_ADDR_ANY) |
1da177e4 LT |
425 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
426 | if (snum) | |
427 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
c720c7e8 ED |
428 | inet->inet_sport = htons(inet->inet_num); |
429 | inet->inet_dport = 0; | |
430 | inet->inet_daddr = 0; | |
1da177e4 | 431 | out: |
cb0721c7 | 432 | if (flags & BIND_WITH_LOCK) |
3679d585 | 433 | release_sock(sk); |
1da177e4 | 434 | return err; |
16ba5e8e ED |
435 | out_unlock: |
436 | rcu_read_unlock(); | |
437 | goto out; | |
1da177e4 | 438 | } |
7159039a | 439 | |
032234d8 DA |
440 | /* bind for INET6 API */ |
441 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
442 | { | |
443 | struct sock *sk = sock->sk; | |
77241217 | 444 | u32 flags = BIND_WITH_LOCK; |
032234d8 DA |
445 | int err = 0; |
446 | ||
447 | /* If the socket has its own bind function then use it. */ | |
448 | if (sk->sk_prot->bind) | |
449 | return sk->sk_prot->bind(sk, uaddr, addr_len); | |
450 | ||
451 | if (addr_len < SIN6_LEN_RFC2133) | |
452 | return -EINVAL; | |
453 | ||
454 | /* BPF prog is run before any checks are done so that if the prog | |
455 | * changes context in a wrong way it will be caught. | |
456 | */ | |
77241217 | 457 | err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, |
6fc88c35 | 458 | CGROUP_INET6_BIND, &flags); |
032234d8 DA |
459 | if (err) |
460 | return err; | |
461 | ||
77241217 | 462 | return __inet6_bind(sk, uaddr, addr_len, flags); |
032234d8 DA |
463 | } |
464 | EXPORT_SYMBOL(inet6_bind); | |
465 | ||
1da177e4 LT |
466 | int inet6_release(struct socket *sock) |
467 | { | |
468 | struct sock *sk = sock->sk; | |
469 | ||
63159f29 | 470 | if (!sk) |
1da177e4 LT |
471 | return -EINVAL; |
472 | ||
473 | /* Free mc lists */ | |
474 | ipv6_sock_mc_close(sk); | |
475 | ||
476 | /* Free ac lists */ | |
477 | ipv6_sock_ac_close(sk); | |
478 | ||
479 | return inet_release(sock); | |
480 | } | |
7159039a YH |
481 | EXPORT_SYMBOL(inet6_release); |
482 | ||
7d06b2e0 | 483 | void inet6_destroy_sock(struct sock *sk) |
1da177e4 LT |
484 | { |
485 | struct ipv6_pinfo *np = inet6_sk(sk); | |
486 | struct sk_buff *skb; | |
487 | struct ipv6_txoptions *opt; | |
488 | ||
1da177e4 LT |
489 | /* Release rx options */ |
490 | ||
647c0c70 | 491 | skb = xchg(&np->pktoptions, NULL); |
f2a2f216 | 492 | kfree_skb(skb); |
4b340ae2 | 493 | |
647c0c70 | 494 | skb = xchg(&np->rxpmtu, NULL); |
f2a2f216 | 495 | kfree_skb(skb); |
1da177e4 LT |
496 | |
497 | /* Free flowlabels */ | |
498 | fl6_free_socklist(sk); | |
499 | ||
500 | /* Free tx options */ | |
501 | ||
45f6fad8 ED |
502 | opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL); |
503 | if (opt) { | |
504 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
505 | txopt_put(opt); | |
506 | } | |
1da177e4 | 507 | } |
3cf3dc6c ACM |
508 | EXPORT_SYMBOL_GPL(inet6_destroy_sock); |
509 | ||
1da177e4 LT |
510 | /* |
511 | * This does both peername and sockname. | |
512 | */ | |
1da177e4 | 513 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
1b66d253 | 514 | int peer) |
1da177e4 | 515 | { |
647c0c70 | 516 | struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr; |
1da177e4 LT |
517 | struct sock *sk = sock->sk; |
518 | struct inet_sock *inet = inet_sk(sk); | |
519 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1ab1457c | 520 | |
1da177e4 LT |
521 | sin->sin6_family = AF_INET6; |
522 | sin->sin6_flowinfo = 0; | |
523 | sin->sin6_scope_id = 0; | |
524 | if (peer) { | |
c720c7e8 | 525 | if (!inet->inet_dport) |
1da177e4 LT |
526 | return -ENOTCONN; |
527 | if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && | |
528 | peer == 1) | |
529 | return -ENOTCONN; | |
c720c7e8 | 530 | sin->sin6_port = inet->inet_dport; |
efe4208f | 531 | sin->sin6_addr = sk->sk_v6_daddr; |
1da177e4 LT |
532 | if (np->sndflow) |
533 | sin->sin6_flowinfo = np->flow_label; | |
a9ed15da | 534 | BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin, |
6fc88c35 | 535 | CGROUP_INET6_GETPEERNAME, |
a9ed15da | 536 | NULL); |
1da177e4 | 537 | } else { |
efe4208f | 538 | if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) |
4e3fd7a0 | 539 | sin->sin6_addr = np->saddr; |
1da177e4 | 540 | else |
efe4208f | 541 | sin->sin6_addr = sk->sk_v6_rcv_saddr; |
c720c7e8 | 542 | sin->sin6_port = inet->inet_sport; |
1b66d253 | 543 | BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin, |
6fc88c35 | 544 | CGROUP_INET6_GETSOCKNAME, |
1b66d253 | 545 | NULL); |
a9ed15da | 546 | } |
842df073 HFS |
547 | sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr, |
548 | sk->sk_bound_dev_if); | |
9b2c45d4 | 549 | return sizeof(*sin); |
1da177e4 | 550 | } |
7159039a YH |
551 | EXPORT_SYMBOL(inet6_getname); |
552 | ||
1da177e4 LT |
553 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
554 | { | |
7c1552da | 555 | void __user *argp = (void __user *)arg; |
1da177e4 | 556 | struct sock *sk = sock->sk; |
3b1e0a65 | 557 | struct net *net = sock_net(sk); |
1da177e4 | 558 | |
647c0c70 | 559 | switch (cmd) { |
1da177e4 | 560 | case SIOCADDRT: |
7c1552da CH |
561 | case SIOCDELRT: { |
562 | struct in6_rtmsg rtmsg; | |
1da177e4 | 563 | |
7c1552da CH |
564 | if (copy_from_user(&rtmsg, argp, sizeof(rtmsg))) |
565 | return -EFAULT; | |
566 | return ipv6_route_ioctl(net, cmd, &rtmsg); | |
567 | } | |
1da177e4 | 568 | case SIOCSIFADDR: |
7c1552da | 569 | return addrconf_add_ifaddr(net, argp); |
1da177e4 | 570 | case SIOCDIFADDR: |
7c1552da | 571 | return addrconf_del_ifaddr(net, argp); |
1da177e4 | 572 | case SIOCSIFDSTADDR: |
7c1552da | 573 | return addrconf_set_dstaddr(net, argp); |
1da177e4 | 574 | default: |
b5e5fa5e CH |
575 | if (!sk->sk_prot->ioctl) |
576 | return -ENOIOCTLCMD; | |
577 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
1da177e4 LT |
578 | } |
579 | /*NOTREACHED*/ | |
a02cec21 | 580 | return 0; |
1da177e4 | 581 | } |
7159039a YH |
582 | EXPORT_SYMBOL(inet6_ioctl); |
583 | ||
3986912f CH |
584 | #ifdef CONFIG_COMPAT |
585 | struct compat_in6_rtmsg { | |
586 | struct in6_addr rtmsg_dst; | |
587 | struct in6_addr rtmsg_src; | |
588 | struct in6_addr rtmsg_gateway; | |
589 | u32 rtmsg_type; | |
590 | u16 rtmsg_dst_len; | |
591 | u16 rtmsg_src_len; | |
592 | u32 rtmsg_metric; | |
593 | u32 rtmsg_info; | |
594 | u32 rtmsg_flags; | |
595 | s32 rtmsg_ifindex; | |
596 | }; | |
597 | ||
598 | static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd, | |
599 | struct compat_in6_rtmsg __user *ur) | |
600 | { | |
601 | struct in6_rtmsg rt; | |
602 | ||
603 | if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst, | |
604 | 3 * sizeof(struct in6_addr)) || | |
605 | get_user(rt.rtmsg_type, &ur->rtmsg_type) || | |
606 | get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) || | |
607 | get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) || | |
608 | get_user(rt.rtmsg_metric, &ur->rtmsg_metric) || | |
609 | get_user(rt.rtmsg_info, &ur->rtmsg_info) || | |
610 | get_user(rt.rtmsg_flags, &ur->rtmsg_flags) || | |
611 | get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex)) | |
612 | return -EFAULT; | |
613 | ||
614 | ||
615 | return ipv6_route_ioctl(sock_net(sk), cmd, &rt); | |
616 | } | |
617 | ||
618 | int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
619 | { | |
620 | void __user *argp = compat_ptr(arg); | |
621 | struct sock *sk = sock->sk; | |
622 | ||
623 | switch (cmd) { | |
624 | case SIOCADDRT: | |
625 | case SIOCDELRT: | |
626 | return inet6_compat_routing_ioctl(sk, cmd, argp); | |
627 | default: | |
628 | return -ENOIOCTLCMD; | |
629 | } | |
630 | } | |
631 | EXPORT_SYMBOL_GPL(inet6_compat_ioctl); | |
632 | #endif /* CONFIG_COMPAT */ | |
633 | ||
164c51fe PA |
634 | INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *, |
635 | size_t)); | |
68ab5d14 PA |
636 | int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
637 | { | |
638 | struct sock *sk = sock->sk; | |
639 | ||
640 | if (unlikely(inet_send_prepare(sk))) | |
641 | return -EAGAIN; | |
642 | ||
164c51fe PA |
643 | return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udpv6_sendmsg, |
644 | sk, msg, size); | |
68ab5d14 PA |
645 | } |
646 | ||
164c51fe PA |
647 | INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *, |
648 | size_t, int, int, int *)); | |
68ab5d14 PA |
649 | int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
650 | int flags) | |
651 | { | |
652 | struct sock *sk = sock->sk; | |
653 | int addr_len = 0; | |
654 | int err; | |
655 | ||
656 | if (likely(!(flags & MSG_ERRQUEUE))) | |
657 | sock_rps_record_flow(sk); | |
658 | ||
164c51fe PA |
659 | err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udpv6_recvmsg, |
660 | sk, msg, size, flags & MSG_DONTWAIT, | |
661 | flags & ~MSG_DONTWAIT, &addr_len); | |
68ab5d14 PA |
662 | if (err >= 0) |
663 | msg->msg_namelen = addr_len; | |
664 | return err; | |
665 | } | |
666 | ||
90ddc4f0 | 667 | const struct proto_ops inet6_stream_ops = { |
543d9cfe ACM |
668 | .family = PF_INET6, |
669 | .owner = THIS_MODULE, | |
670 | .release = inet6_release, | |
671 | .bind = inet6_bind, | |
672 | .connect = inet_stream_connect, /* ok */ | |
673 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
674 | .accept = inet_accept, /* ok */ | |
675 | .getname = inet6_getname, | |
a11e1d43 | 676 | .poll = tcp_poll, /* ok */ |
543d9cfe | 677 | .ioctl = inet6_ioctl, /* must change */ |
c7cbdbf2 | 678 | .gettstamp = sock_gettstamp, |
543d9cfe ACM |
679 | .listen = inet_listen, /* ok */ |
680 | .shutdown = inet_shutdown, /* ok */ | |
681 | .setsockopt = sock_common_setsockopt, /* ok */ | |
682 | .getsockopt = sock_common_getsockopt, /* ok */ | |
68ab5d14 PA |
683 | .sendmsg = inet6_sendmsg, /* retpoline's sake */ |
684 | .recvmsg = inet6_recvmsg, /* retpoline's sake */ | |
05255b82 | 685 | #ifdef CONFIG_MMU |
93ab6cc6 | 686 | .mmap = tcp_mmap, |
05255b82 | 687 | #endif |
7ba42910 | 688 | .sendpage = inet_sendpage, |
45f91bdc JF |
689 | .sendmsg_locked = tcp_sendmsg_locked, |
690 | .sendpage_locked = tcp_sendpage_locked, | |
a0974dd3 | 691 | .splice_read = tcp_splice_read, |
32035585 TH |
692 | .read_sock = tcp_read_sock, |
693 | .peek_len = tcp_peek_len, | |
3fdadf7d | 694 | #ifdef CONFIG_COMPAT |
3986912f | 695 | .compat_ioctl = inet6_compat_ioctl, |
3fdadf7d | 696 | #endif |
d1361840 | 697 | .set_rcvlowat = tcp_set_rcvlowat, |
1da177e4 LT |
698 | }; |
699 | ||
90ddc4f0 | 700 | const struct proto_ops inet6_dgram_ops = { |
543d9cfe ACM |
701 | .family = PF_INET6, |
702 | .owner = THIS_MODULE, | |
703 | .release = inet6_release, | |
704 | .bind = inet6_bind, | |
705 | .connect = inet_dgram_connect, /* ok */ | |
706 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
707 | .accept = sock_no_accept, /* a do nothing */ | |
708 | .getname = inet6_getname, | |
a11e1d43 | 709 | .poll = udp_poll, /* ok */ |
543d9cfe | 710 | .ioctl = inet6_ioctl, /* must change */ |
c7cbdbf2 | 711 | .gettstamp = sock_gettstamp, |
543d9cfe ACM |
712 | .listen = sock_no_listen, /* ok */ |
713 | .shutdown = inet_shutdown, /* ok */ | |
714 | .setsockopt = sock_common_setsockopt, /* ok */ | |
715 | .getsockopt = sock_common_getsockopt, /* ok */ | |
68ab5d14 PA |
716 | .sendmsg = inet6_sendmsg, /* retpoline's sake */ |
717 | .recvmsg = inet6_recvmsg, /* retpoline's sake */ | |
d7f57118 | 718 | .read_sock = udp_read_sock, |
543d9cfe ACM |
719 | .mmap = sock_no_mmap, |
720 | .sendpage = sock_no_sendpage, | |
627d2d6b | 721 | .set_peek_off = sk_set_peek_off, |
3fdadf7d | 722 | #ifdef CONFIG_COMPAT |
3986912f | 723 | .compat_ioctl = inet6_compat_ioctl, |
3fdadf7d | 724 | #endif |
1da177e4 LT |
725 | }; |
726 | ||
ec1b4cf7 | 727 | static const struct net_proto_family inet6_family_ops = { |
1da177e4 LT |
728 | .family = PF_INET6, |
729 | .create = inet6_create, | |
730 | .owner = THIS_MODULE, | |
731 | }; | |
732 | ||
87c3efbf | 733 | int inet6_register_protosw(struct inet_protosw *p) |
1da177e4 LT |
734 | { |
735 | struct list_head *lh; | |
736 | struct inet_protosw *answer; | |
1da177e4 | 737 | struct list_head *last_perm; |
87c3efbf DL |
738 | int protocol = p->protocol; |
739 | int ret; | |
1da177e4 LT |
740 | |
741 | spin_lock_bh(&inetsw6_lock); | |
742 | ||
87c3efbf | 743 | ret = -EINVAL; |
1da177e4 LT |
744 | if (p->type >= SOCK_MAX) |
745 | goto out_illegal; | |
746 | ||
747 | /* If we are trying to override a permanent protocol, bail. */ | |
748 | answer = NULL; | |
87c3efbf | 749 | ret = -EPERM; |
1da177e4 LT |
750 | last_perm = &inetsw6[p->type]; |
751 | list_for_each(lh, &inetsw6[p->type]) { | |
752 | answer = list_entry(lh, struct inet_protosw, list); | |
753 | ||
754 | /* Check only the non-wild match. */ | |
755 | if (INET_PROTOSW_PERMANENT & answer->flags) { | |
756 | if (protocol == answer->protocol) | |
757 | break; | |
758 | last_perm = lh; | |
759 | } | |
760 | ||
761 | answer = NULL; | |
762 | } | |
763 | if (answer) | |
764 | goto out_permanent; | |
765 | ||
766 | /* Add the new entry after the last permanent entry if any, so that | |
767 | * the new entry does not override a permanent entry when matched with | |
768 | * a wild-card protocol. But it is allowed to override any existing | |
1ab1457c | 769 | * non-permanent entry. This means that when we remove this entry, the |
1da177e4 LT |
770 | * system automatically returns to the old behavior. |
771 | */ | |
772 | list_add_rcu(&p->list, last_perm); | |
87c3efbf | 773 | ret = 0; |
1da177e4 LT |
774 | out: |
775 | spin_unlock_bh(&inetsw6_lock); | |
87c3efbf | 776 | return ret; |
1da177e4 LT |
777 | |
778 | out_permanent: | |
f3213831 | 779 | pr_err("Attempt to override permanent protocol %d\n", protocol); |
1da177e4 LT |
780 | goto out; |
781 | ||
782 | out_illegal: | |
f3213831 | 783 | pr_err("Ignoring attempt to register invalid socket type %d\n", |
1da177e4 LT |
784 | p->type); |
785 | goto out; | |
786 | } | |
7159039a YH |
787 | EXPORT_SYMBOL(inet6_register_protosw); |
788 | ||
1da177e4 LT |
789 | void |
790 | inet6_unregister_protosw(struct inet_protosw *p) | |
791 | { | |
792 | if (INET_PROTOSW_PERMANENT & p->flags) { | |
f3213831 | 793 | pr_err("Attempt to unregister permanent protocol %d\n", |
1da177e4 LT |
794 | p->protocol); |
795 | } else { | |
796 | spin_lock_bh(&inetsw6_lock); | |
797 | list_del_rcu(&p->list); | |
798 | spin_unlock_bh(&inetsw6_lock); | |
799 | ||
800 | synchronize_net(); | |
801 | } | |
802 | } | |
7159039a YH |
803 | EXPORT_SYMBOL(inet6_unregister_protosw); |
804 | ||
b9750ce1 ACM |
805 | int inet6_sk_rebuild_header(struct sock *sk) |
806 | { | |
b9750ce1 | 807 | struct ipv6_pinfo *np = inet6_sk(sk); |
68d0c6d3 | 808 | struct dst_entry *dst; |
b9750ce1 ACM |
809 | |
810 | dst = __sk_dst_check(sk, np->dst_cookie); | |
811 | ||
63159f29 | 812 | if (!dst) { |
b9750ce1 | 813 | struct inet_sock *inet = inet_sk(sk); |
20c59de2 | 814 | struct in6_addr *final_p, final; |
4c9483b2 DM |
815 | struct flowi6 fl6; |
816 | ||
817 | memset(&fl6, 0, sizeof(fl6)); | |
818 | fl6.flowi6_proto = sk->sk_protocol; | |
efe4208f | 819 | fl6.daddr = sk->sk_v6_daddr; |
4e3fd7a0 | 820 | fl6.saddr = np->saddr; |
4c9483b2 DM |
821 | fl6.flowlabel = np->flow_label; |
822 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
823 | fl6.flowi6_mark = sk->sk_mark; | |
1958b856 DM |
824 | fl6.fl6_dport = inet->inet_dport; |
825 | fl6.fl6_sport = inet->inet_sport; | |
e2d118a1 | 826 | fl6.flowi6_uid = sk->sk_uid; |
3df98d79 | 827 | security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6)); |
4c9483b2 | 828 | |
45f6fad8 ED |
829 | rcu_read_lock(); |
830 | final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt), | |
831 | &final); | |
832 | rcu_read_unlock(); | |
4c9483b2 | 833 | |
c4e85f73 | 834 | dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p); |
68d0c6d3 | 835 | if (IS_ERR(dst)) { |
b9750ce1 | 836 | sk->sk_route_caps = 0; |
68d0c6d3 DM |
837 | sk->sk_err_soft = -PTR_ERR(dst); |
838 | return PTR_ERR(dst); | |
b9750ce1 ACM |
839 | } |
840 | ||
6bd4f355 | 841 | ip6_dst_store(sk, dst, NULL, NULL); |
b9750ce1 ACM |
842 | } |
843 | ||
844 | return 0; | |
845 | } | |
b9750ce1 ACM |
846 | EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); |
847 | ||
a224772d ED |
848 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
849 | const struct inet6_skb_parm *opt) | |
399c07de | 850 | { |
92113bfd | 851 | const struct ipv6_pinfo *np = inet6_sk(sk); |
399c07de ACM |
852 | |
853 | if (np->rxopt.all) { | |
8b58a398 FW |
854 | if (((opt->flags & IP6SKB_HOPBYHOP) && |
855 | (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) || | |
ac1eabca | 856 | (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) && |
399c07de ACM |
857 | np->rxopt.bits.rxflow) || |
858 | (opt->srcrt && (np->rxopt.bits.srcrt || | |
859 | np->rxopt.bits.osrcrt)) || | |
860 | ((opt->dst1 || opt->dst0) && | |
861 | (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) | |
92113bfd | 862 | return true; |
399c07de | 863 | } |
92113bfd | 864 | return false; |
399c07de | 865 | } |
399c07de ACM |
866 | EXPORT_SYMBOL_GPL(ipv6_opt_accepted); |
867 | ||
7546dd97 | 868 | static struct packet_type ipv6_packet_type __read_mostly = { |
09640e63 | 869 | .type = cpu_to_be16(ETH_P_IPV6), |
662397fd | 870 | .func = ipv6_rcv, |
d8269e2c | 871 | .list_func = ipv6_list_rcv, |
22061d80 VY |
872 | }; |
873 | ||
662397fd YH |
874 | static int __init ipv6_packet_init(void) |
875 | { | |
876 | dev_add_pack(&ipv6_packet_type); | |
877 | return 0; | |
878 | } | |
879 | ||
880 | static void ipv6_packet_cleanup(void) | |
881 | { | |
882 | dev_remove_pack(&ipv6_packet_type); | |
883 | } | |
884 | ||
e43291cb DL |
885 | static int __net_init ipv6_init_mibs(struct net *net) |
886 | { | |
827da44c JS |
887 | int i; |
888 | ||
698365fa WC |
889 | net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib); |
890 | if (!net->mib.udp_stats_in6) | |
0c7ed677 | 891 | return -ENOMEM; |
698365fa WC |
892 | net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib); |
893 | if (!net->mib.udplite_stats_in6) | |
be713a44 | 894 | goto err_udplite_mib; |
698365fa WC |
895 | net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib); |
896 | if (!net->mib.ipv6_statistics) | |
9261e537 | 897 | goto err_ip_mib; |
827da44c JS |
898 | |
899 | for_each_possible_cpu(i) { | |
900 | struct ipstats_mib *af_inet6_stats; | |
698365fa | 901 | af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i); |
827da44c | 902 | u64_stats_init(&af_inet6_stats->syncp); |
827da44c JS |
903 | } |
904 | ||
905 | ||
698365fa WC |
906 | net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib); |
907 | if (!net->mib.icmpv6_statistics) | |
9261e537 | 908 | goto err_icmp_mib; |
2a24444f ED |
909 | net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib), |
910 | GFP_KERNEL); | |
911 | if (!net->mib.icmpv6msg_statistics) | |
9261e537 | 912 | goto err_icmpmsg_mib; |
e43291cb | 913 | return 0; |
be713a44 | 914 | |
9261e537 | 915 | err_icmpmsg_mib: |
698365fa | 916 | free_percpu(net->mib.icmpv6_statistics); |
9261e537 | 917 | err_icmp_mib: |
698365fa | 918 | free_percpu(net->mib.ipv6_statistics); |
9261e537 | 919 | err_ip_mib: |
698365fa | 920 | free_percpu(net->mib.udplite_stats_in6); |
be713a44 | 921 | err_udplite_mib: |
698365fa | 922 | free_percpu(net->mib.udp_stats_in6); |
be713a44 | 923 | return -ENOMEM; |
e43291cb DL |
924 | } |
925 | ||
2c8c1e72 | 926 | static void ipv6_cleanup_mibs(struct net *net) |
e43291cb | 927 | { |
698365fa WC |
928 | free_percpu(net->mib.udp_stats_in6); |
929 | free_percpu(net->mib.udplite_stats_in6); | |
930 | free_percpu(net->mib.ipv6_statistics); | |
931 | free_percpu(net->mib.icmpv6_statistics); | |
2a24444f | 932 | kfree(net->mib.icmpv6msg_statistics); |
e43291cb DL |
933 | } |
934 | ||
e7dc8494 | 935 | static int __net_init inet6_net_init(struct net *net) |
81c1c178 | 936 | { |
0c96d8c5 DL |
937 | int err = 0; |
938 | ||
99bc9c4e | 939 | net->ipv6.sysctl.bindv6only = 0; |
41a76906 | 940 | net->ipv6.sysctl.icmpv6_time = 1*HZ; |
e6f86b0f | 941 | net->ipv6.sysctl.icmpv6_echo_ignore_all = 0; |
03f1eccc | 942 | net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0; |
0b03a5ca | 943 | net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0; |
0bc19985 SS |
944 | |
945 | /* By default, rate limit error messages. | |
946 | * Except for pmtu discovery, it would break it. | |
947 | * proc_do_large_bitmap needs pointer to the bitmap. | |
948 | */ | |
949 | bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1); | |
950 | bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1); | |
951 | net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask; | |
952 | ||
6444f72b | 953 | net->ipv6.sysctl.flowlabel_consistency = 1; |
42240901 | 954 | net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS; |
1855b7c3 HFS |
955 | net->ipv6.sysctl.idgen_retries = 3; |
956 | net->ipv6.sysctl.idgen_delay = 1 * HZ; | |
be26849b | 957 | net->ipv6.sysctl.flowlabel_state_ranges = 0; |
47d3d7ac TH |
958 | net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT; |
959 | net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT; | |
960 | net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN; | |
961 | net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN; | |
907eea48 | 962 | net->ipv6.sysctl.fib_notify_on_flag_change = 0; |
812918c4 | 963 | atomic_set(&net->ipv6.fib6_sernum, 1); |
e71e0349 | 964 | |
9ee11f0f JI |
965 | net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID; |
966 | net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE; | |
967 | ||
e43291cb DL |
968 | err = ipv6_init_mibs(net); |
969 | if (err) | |
970 | return err; | |
0c96d8c5 DL |
971 | #ifdef CONFIG_PROC_FS |
972 | err = udp6_proc_init(net); | |
973 | if (err) | |
974 | goto out; | |
6f8b13bc DL |
975 | err = tcp6_proc_init(net); |
976 | if (err) | |
977 | goto proc_tcp6_fail; | |
6ab57e7e DL |
978 | err = ac6_proc_init(net); |
979 | if (err) | |
980 | goto proc_ac6_fail; | |
0c96d8c5 DL |
981 | #endif |
982 | return err; | |
6f8b13bc DL |
983 | |
984 | #ifdef CONFIG_PROC_FS | |
6ab57e7e DL |
985 | proc_ac6_fail: |
986 | tcp6_proc_exit(net); | |
6f8b13bc DL |
987 | proc_tcp6_fail: |
988 | udp6_proc_exit(net); | |
e43291cb DL |
989 | out: |
990 | ipv6_cleanup_mibs(net); | |
991 | return err; | |
6f8b13bc | 992 | #endif |
81c1c178 DL |
993 | } |
994 | ||
2c8c1e72 | 995 | static void __net_exit inet6_net_exit(struct net *net) |
81c1c178 | 996 | { |
0c96d8c5 DL |
997 | #ifdef CONFIG_PROC_FS |
998 | udp6_proc_exit(net); | |
6f8b13bc | 999 | tcp6_proc_exit(net); |
6ab57e7e | 1000 | ac6_proc_exit(net); |
0c96d8c5 | 1001 | #endif |
e43291cb | 1002 | ipv6_cleanup_mibs(net); |
81c1c178 DL |
1003 | } |
1004 | ||
1005 | static struct pernet_operations inet6_net_ops = { | |
1006 | .init = inet6_net_init, | |
1007 | .exit = inet6_net_exit, | |
1008 | }; | |
1009 | ||
9b0a6a9d PO |
1010 | static int ipv6_route_input(struct sk_buff *skb) |
1011 | { | |
1012 | ip6_route_input(skb); | |
1013 | return skb_dst(skb)->error; | |
1014 | } | |
1015 | ||
5f81bd2e CW |
1016 | static const struct ipv6_stub ipv6_stub_impl = { |
1017 | .ipv6_sock_mc_join = ipv6_sock_mc_join, | |
1018 | .ipv6_sock_mc_drop = ipv6_sock_mc_drop, | |
6c8991f4 | 1019 | .ipv6_dst_lookup_flow = ip6_dst_lookup_flow, |
9b0a6a9d | 1020 | .ipv6_route_input = ipv6_route_input, |
65a2022e DA |
1021 | .fib6_get_table = fib6_get_table, |
1022 | .fib6_table_lookup = fib6_table_lookup, | |
1023 | .fib6_lookup = fib6_lookup, | |
b1d40991 | 1024 | .fib6_select_path = fib6_select_path, |
901731b8 | 1025 | .ip6_mtu_from_fib6 = ip6_mtu_from_fib6, |
1aefd3de DA |
1026 | .fib6_nh_init = fib6_nh_init, |
1027 | .fib6_nh_release = fib6_nh_release, | |
cdaa16a4 | 1028 | .fib6_update_sernum = fib6_update_sernum_stub, |
19a3b7ee | 1029 | .fib6_rt_update = fib6_rt_update, |
68a9b13d | 1030 | .ip6_del_rt = ip6_del_rt, |
5f81bd2e | 1031 | .udpv6_encap_enable = udpv6_encap_enable, |
f564f45c | 1032 | .ndisc_send_na = ndisc_send_na, |
0146dca7 | 1033 | #if IS_ENABLED(CONFIG_XFRM) |
3e50ddd8 | 1034 | .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu, |
0146dca7 | 1035 | .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv, |
26333c37 | 1036 | .xfrm6_rcv_encap = xfrm6_rcv_encap, |
0146dca7 | 1037 | #endif |
e15a00aa | 1038 | .nd_tbl = &nd_tbl, |
1d97898b | 1039 | .ipv6_fragment = ip6_fragment, |
504a4011 | 1040 | .ipv6_dev_find = ipv6_dev_find, |
5f81bd2e CW |
1041 | }; |
1042 | ||
d74bad4e AI |
1043 | static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = { |
1044 | .inet6_bind = __inet6_bind, | |
8a615c6b | 1045 | .udp6_lib_lookup = __udp6_lib_lookup, |
d74bad4e AI |
1046 | }; |
1047 | ||
1da177e4 LT |
1048 | static int __init inet6_init(void) |
1049 | { | |
1ab1457c | 1050 | struct list_head *r; |
fe7ca2e1 | 1051 | int err = 0; |
1da177e4 | 1052 | |
b4772ef8 | 1053 | sock_skb_cb_check_size(sizeof(struct inet6_skb_parm)); |
ef047f5e | 1054 | |
fe7ca2e1 | 1055 | /* Register the socket-side information for inet6_create. */ |
647c0c70 | 1056 | for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) |
fe7ca2e1 BH |
1057 | INIT_LIST_HEAD(r); |
1058 | ||
56d417b1 | 1059 | if (disable_ipv6_mod) { |
f3213831 | 1060 | pr_info("Loaded, but administratively disabled, reboot required to enable\n"); |
fe7ca2e1 BH |
1061 | goto out; |
1062 | } | |
1063 | ||
1da177e4 LT |
1064 | err = proto_register(&tcpv6_prot, 1); |
1065 | if (err) | |
1066 | goto out; | |
1067 | ||
1068 | err = proto_register(&udpv6_prot, 1); | |
1069 | if (err) | |
1070 | goto out_unregister_tcp_proto; | |
1071 | ||
ba4e58ec | 1072 | err = proto_register(&udplitev6_prot, 1); |
1da177e4 LT |
1073 | if (err) |
1074 | goto out_unregister_udp_proto; | |
1075 | ||
ba4e58ec GR |
1076 | err = proto_register(&rawv6_prot, 1); |
1077 | if (err) | |
1078 | goto out_unregister_udplite_proto; | |
1079 | ||
6d0bfe22 LC |
1080 | err = proto_register(&pingv6_prot, 1); |
1081 | if (err) | |
a03dc36b | 1082 | goto out_unregister_raw_proto; |
1da177e4 | 1083 | |
1da177e4 LT |
1084 | /* We MUST register RAW sockets before we create the ICMP6, |
1085 | * IGMP6, or NDISC control sockets. | |
1086 | */ | |
7f4e4868 DL |
1087 | err = rawv6_init(); |
1088 | if (err) | |
a03dc36b | 1089 | goto out_unregister_ping_proto; |
1da177e4 LT |
1090 | |
1091 | /* Register the family here so that the init calls below will | |
1092 | * be able to create sockets. (?? is this dangerous ??) | |
1093 | */ | |
8eb55910 DM |
1094 | err = sock_register(&inet6_family_ops); |
1095 | if (err) | |
7f4e4868 | 1096 | goto out_sock_register_fail; |
1da177e4 | 1097 | |
1da177e4 LT |
1098 | /* |
1099 | * ipngwg API draft makes clear that the correct semantics | |
1100 | * for TCP and UDP is to consider one TCP and UDP instance | |
25985edc | 1101 | * in a host available by both INET and INET6 APIs and |
1da177e4 LT |
1102 | * able to communicate via both network protocols. |
1103 | */ | |
1104 | ||
81c1c178 DL |
1105 | err = register_pernet_subsys(&inet6_net_ops); |
1106 | if (err) | |
1107 | goto register_pernet_fail; | |
623d1a1a WC |
1108 | err = ip6_mr_init(); |
1109 | if (err) | |
1110 | goto ipmr_fail; | |
15e66807 WC |
1111 | err = icmpv6_init(); |
1112 | if (err) | |
1113 | goto icmp_fail; | |
9b0f976f | 1114 | err = ndisc_init(); |
1da177e4 LT |
1115 | if (err) |
1116 | goto ndisc_fail; | |
9b0f976f | 1117 | err = igmp6_init(); |
1da177e4 LT |
1118 | if (err) |
1119 | goto igmp_fail; | |
5f81bd2e | 1120 | |
2cc7d573 HW |
1121 | err = ipv6_netfilter_init(); |
1122 | if (err) | |
1123 | goto netfilter_fail; | |
1da177e4 LT |
1124 | /* Create /proc/foo6 entries. */ |
1125 | #ifdef CONFIG_PROC_FS | |
1126 | err = -ENOMEM; | |
1127 | if (raw6_proc_init()) | |
1128 | goto proc_raw6_fail; | |
ba4e58ec GR |
1129 | if (udplite6_proc_init()) |
1130 | goto proc_udplite6_fail; | |
1da177e4 LT |
1131 | if (ipv6_misc_proc_init()) |
1132 | goto proc_misc6_fail; | |
1da177e4 LT |
1133 | if (if6_proc_init()) |
1134 | goto proc_if6_fail; | |
1135 | #endif | |
e2fddf5e DL |
1136 | err = ip6_route_init(); |
1137 | if (err) | |
1138 | goto ip6_route_fail; | |
2c861cc6 MK |
1139 | err = ndisc_late_init(); |
1140 | if (err) | |
1141 | goto ndisc_late_fail; | |
0a3e78ac DL |
1142 | err = ip6_flowlabel_init(); |
1143 | if (err) | |
1144 | goto ip6_flowlabel_fail; | |
2384d025 JB |
1145 | err = ipv6_anycast_init(); |
1146 | if (err) | |
1147 | goto ipv6_anycast_fail; | |
1da177e4 LT |
1148 | err = addrconf_init(); |
1149 | if (err) | |
1150 | goto addrconf_fail; | |
1da177e4 LT |
1151 | |
1152 | /* Init v6 extension headers. */ | |
248b238d DL |
1153 | err = ipv6_exthdrs_init(); |
1154 | if (err) | |
1155 | goto ipv6_exthdrs_fail; | |
1156 | ||
853cbbaa DL |
1157 | err = ipv6_frag_init(); |
1158 | if (err) | |
1159 | goto ipv6_frag_fail; | |
1da177e4 LT |
1160 | |
1161 | /* Init v6 transport protocols. */ | |
7f4e4868 DL |
1162 | err = udpv6_init(); |
1163 | if (err) | |
1164 | goto udpv6_fail; | |
e2ed4052 | 1165 | |
7f4e4868 DL |
1166 | err = udplitev6_init(); |
1167 | if (err) | |
1168 | goto udplitev6_fail; | |
1169 | ||
a6024562 TH |
1170 | err = udpv6_offload_init(); |
1171 | if (err) | |
1172 | goto udpv6_offload_fail; | |
1173 | ||
7f4e4868 DL |
1174 | err = tcpv6_init(); |
1175 | if (err) | |
1176 | goto tcpv6_fail; | |
1177 | ||
1178 | err = ipv6_packet_init(); | |
1179 | if (err) | |
1180 | goto ipv6_packet_fail; | |
94911fe3 | 1181 | |
6d0bfe22 LC |
1182 | err = pingv6_init(); |
1183 | if (err) | |
1184 | goto pingv6_fail; | |
1185 | ||
cb72d382 HD |
1186 | err = calipso_init(); |
1187 | if (err) | |
1188 | goto calipso_fail; | |
1189 | ||
915d7e5e DL |
1190 | err = seg6_init(); |
1191 | if (err) | |
1192 | goto seg6_fail; | |
1193 | ||
a7a29f9c AA |
1194 | err = rpl_init(); |
1195 | if (err) | |
1196 | goto rpl_fail; | |
1197 | ||
9ee11f0f JI |
1198 | err = ioam6_init(); |
1199 | if (err) | |
1200 | goto ioam6_fail; | |
1201 | ||
382ed724 VY |
1202 | err = igmp6_late_init(); |
1203 | if (err) | |
1204 | goto igmp6_late_err; | |
1205 | ||
94911fe3 BT |
1206 | #ifdef CONFIG_SYSCTL |
1207 | err = ipv6_sysctl_register(); | |
1208 | if (err) | |
1209 | goto sysctl_fail; | |
1210 | #endif | |
b7d6df57 PA |
1211 | |
1212 | /* ensure that ipv6 stubs are visible only after ipv6 is ready */ | |
1213 | wmb(); | |
1214 | ipv6_stub = &ipv6_stub_impl; | |
d74bad4e | 1215 | ipv6_bpf_stub = &ipv6_bpf_stub_impl; |
1da177e4 LT |
1216 | out: |
1217 | return err; | |
1218 | ||
94911fe3 BT |
1219 | #ifdef CONFIG_SYSCTL |
1220 | sysctl_fail: | |
382ed724 | 1221 | igmp6_late_cleanup(); |
94911fe3 | 1222 | #endif |
382ed724 | 1223 | igmp6_late_err: |
9ee11f0f JI |
1224 | ioam6_exit(); |
1225 | ioam6_fail: | |
a7a29f9c AA |
1226 | rpl_exit(); |
1227 | rpl_fail: | |
382ed724 | 1228 | seg6_exit(); |
915d7e5e DL |
1229 | seg6_fail: |
1230 | calipso_exit(); | |
cb72d382 HD |
1231 | calipso_fail: |
1232 | pingv6_exit(); | |
6d0bfe22 | 1233 | pingv6_fail: |
eca42aaf | 1234 | ipv6_packet_cleanup(); |
7f4e4868 DL |
1235 | ipv6_packet_fail: |
1236 | tcpv6_exit(); | |
1237 | tcpv6_fail: | |
a6024562 TH |
1238 | udpv6_offload_exit(); |
1239 | udpv6_offload_fail: | |
7f4e4868 DL |
1240 | udplitev6_exit(); |
1241 | udplitev6_fail: | |
1242 | udpv6_exit(); | |
1243 | udpv6_fail: | |
1244 | ipv6_frag_exit(); | |
853cbbaa DL |
1245 | ipv6_frag_fail: |
1246 | ipv6_exthdrs_exit(); | |
248b238d DL |
1247 | ipv6_exthdrs_fail: |
1248 | addrconf_cleanup(); | |
1da177e4 | 1249 | addrconf_fail: |
2384d025 JB |
1250 | ipv6_anycast_cleanup(); |
1251 | ipv6_anycast_fail: | |
1da177e4 | 1252 | ip6_flowlabel_cleanup(); |
0a3e78ac | 1253 | ip6_flowlabel_fail: |
2c861cc6 MK |
1254 | ndisc_late_cleanup(); |
1255 | ndisc_late_fail: | |
1da177e4 | 1256 | ip6_route_cleanup(); |
e2fddf5e | 1257 | ip6_route_fail: |
1da177e4 LT |
1258 | #ifdef CONFIG_PROC_FS |
1259 | if6_proc_exit(); | |
1260 | proc_if6_fail: | |
1da177e4 LT |
1261 | ipv6_misc_proc_exit(); |
1262 | proc_misc6_fail: | |
ba4e58ec GR |
1263 | udplite6_proc_exit(); |
1264 | proc_udplite6_fail: | |
1da177e4 LT |
1265 | raw6_proc_exit(); |
1266 | proc_raw6_fail: | |
1267 | #endif | |
2cc7d573 HW |
1268 | ipv6_netfilter_fini(); |
1269 | netfilter_fail: | |
1da177e4 LT |
1270 | igmp6_cleanup(); |
1271 | igmp_fail: | |
1272 | ndisc_cleanup(); | |
1273 | ndisc_fail: | |
afe49de4 | 1274 | icmpv6_cleanup(); |
1da177e4 | 1275 | icmp_fail: |
afe49de4 | 1276 | ip6_mr_cleanup(); |
15e66807 | 1277 | ipmr_fail: |
afe49de4 | 1278 | unregister_pernet_subsys(&inet6_net_ops); |
81c1c178 | 1279 | register_pernet_fail: |
8eb55910 | 1280 | sock_unregister(PF_INET6); |
e2fddf5e | 1281 | rtnl_unregister_all(PF_INET6); |
7f4e4868 DL |
1282 | out_sock_register_fail: |
1283 | rawv6_exit(); | |
6d0bfe22 LC |
1284 | out_unregister_ping_proto: |
1285 | proto_unregister(&pingv6_prot); | |
1da177e4 LT |
1286 | out_unregister_raw_proto: |
1287 | proto_unregister(&rawv6_prot); | |
ba4e58ec GR |
1288 | out_unregister_udplite_proto: |
1289 | proto_unregister(&udplitev6_prot); | |
1da177e4 LT |
1290 | out_unregister_udp_proto: |
1291 | proto_unregister(&udpv6_prot); | |
1292 | out_unregister_tcp_proto: | |
1293 | proto_unregister(&tcpv6_prot); | |
1294 | goto out; | |
1295 | } | |
1296 | module_init(inet6_init); | |
1297 | ||
1da177e4 | 1298 | MODULE_ALIAS_NETPROTO(PF_INET6); |