Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * PF_INET6 socket protocol family | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * |
8 | * Adapted from linux/net/ipv4/af_inet.c | |
9 | * | |
1da177e4 LT |
10 | * Fixes: |
11 | * piggy, Karl Knutson : Socket protocol table | |
12 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
13 | * Arnaldo Melo : check proc_net_create return, cleanups | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License | |
17 | * as published by the Free Software Foundation; either version | |
18 | * 2 of the License, or (at your option) any later version. | |
19 | */ | |
20 | ||
21 | ||
22 | #include <linux/module.h> | |
4fc268d2 | 23 | #include <linux/capability.h> |
1da177e4 LT |
24 | #include <linux/errno.h> |
25 | #include <linux/types.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/in.h> | |
28 | #include <linux/kernel.h> | |
1da177e4 LT |
29 | #include <linux/timer.h> |
30 | #include <linux/string.h> | |
31 | #include <linux/sockios.h> | |
32 | #include <linux/net.h> | |
33 | #include <linux/fcntl.h> | |
34 | #include <linux/mm.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/proc_fs.h> | |
37 | #include <linux/stat.h> | |
38 | #include <linux/init.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 LT |
40 | |
41 | #include <linux/inet.h> | |
42 | #include <linux/netdevice.h> | |
43 | #include <linux/icmpv6.h> | |
2cc7d573 | 44 | #include <linux/netfilter_ipv6.h> |
1da177e4 LT |
45 | |
46 | #include <net/ip.h> | |
47 | #include <net/ipv6.h> | |
48 | #include <net/udp.h> | |
ba4e58ec | 49 | #include <net/udplite.h> |
1da177e4 LT |
50 | #include <net/tcp.h> |
51 | #include <net/ipip.h> | |
52 | #include <net/protocol.h> | |
53 | #include <net/inet_common.h> | |
1668e010 | 54 | #include <net/route.h> |
1da177e4 LT |
55 | #include <net/transp_v6.h> |
56 | #include <net/ip6_route.h> | |
57 | #include <net/addrconf.h> | |
58 | #ifdef CONFIG_IPV6_TUNNEL | |
59 | #include <net/ip6_tunnel.h> | |
60 | #endif | |
61 | ||
62 | #include <asm/uaccess.h> | |
7bc570c8 | 63 | #include <linux/mroute6.h> |
1da177e4 LT |
64 | |
65 | MODULE_AUTHOR("Cast of dozens"); | |
66 | MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); | |
67 | MODULE_LICENSE("GPL"); | |
68 | ||
f1267347 | 69 | /* The inetsw6 table contains everything that inet6_create needs to |
1da177e4 LT |
70 | * build a new socket. |
71 | */ | |
72 | static struct list_head inetsw6[SOCK_MAX]; | |
73 | static DEFINE_SPINLOCK(inetsw6_lock); | |
74 | ||
56d417b1 BH |
75 | struct ipv6_params ipv6_defaults = { |
76 | .disable_ipv6 = 0, | |
77 | .autoconf = 1, | |
78 | }; | |
79 | ||
647c0c70 | 80 | static int disable_ipv6_mod; |
56d417b1 BH |
81 | |
82 | module_param_named(disable, disable_ipv6_mod, int, 0444); | |
83 | MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional"); | |
84 | ||
85 | module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444); | |
86 | MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces"); | |
87 | ||
88 | module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444); | |
89 | MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces"); | |
fe7ca2e1 | 90 | |
1da177e4 LT |
91 | static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) |
92 | { | |
93 | const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); | |
94 | ||
95 | return (struct ipv6_pinfo *)(((u8 *)sk) + offset); | |
96 | } | |
97 | ||
3f378b68 EP |
98 | static int inet6_create(struct net *net, struct socket *sock, int protocol, |
99 | int kern) | |
1da177e4 LT |
100 | { |
101 | struct inet_sock *inet; | |
102 | struct ipv6_pinfo *np; | |
103 | struct sock *sk; | |
1da177e4 LT |
104 | struct inet_protosw *answer; |
105 | struct proto *answer_prot; | |
106 | unsigned char answer_flags; | |
107 | char answer_no_check; | |
af1afe86 YH |
108 | int try_loading_module = 0; |
109 | int err; | |
1da177e4 | 110 | |
b3da2cf3 DM |
111 | if (sock->type != SOCK_RAW && |
112 | sock->type != SOCK_DGRAM && | |
113 | !inet_ehash_secret) | |
114 | build_ehash_secret(); | |
115 | ||
1da177e4 | 116 | /* Look for the requested type/protocol pair. */ |
af1afe86 YH |
117 | lookup_protocol: |
118 | err = -ESOCKTNOSUPPORT; | |
1da177e4 | 119 | rcu_read_lock(); |
696adfe8 | 120 | list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { |
1da177e4 | 121 | |
696adfe8 | 122 | err = 0; |
1da177e4 LT |
123 | /* Check the non-wild match. */ |
124 | if (protocol == answer->protocol) { | |
125 | if (protocol != IPPROTO_IP) | |
126 | break; | |
127 | } else { | |
128 | /* Check for the two wild cases. */ | |
129 | if (IPPROTO_IP == protocol) { | |
130 | protocol = answer->protocol; | |
131 | break; | |
132 | } | |
133 | if (IPPROTO_IP == answer->protocol) | |
134 | break; | |
135 | } | |
af1afe86 | 136 | err = -EPROTONOSUPPORT; |
1da177e4 LT |
137 | } |
138 | ||
696adfe8 | 139 | if (err) { |
af1afe86 YH |
140 | if (try_loading_module < 2) { |
141 | rcu_read_unlock(); | |
142 | /* | |
143 | * Be more specific, e.g. net-pf-10-proto-132-type-1 | |
144 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) | |
145 | */ | |
146 | if (++try_loading_module == 1) | |
147 | request_module("net-pf-%d-proto-%d-type-%d", | |
148 | PF_INET6, protocol, sock->type); | |
149 | /* | |
150 | * Fall back to generic, e.g. net-pf-10-proto-132 | |
151 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP) | |
152 | */ | |
153 | else | |
154 | request_module("net-pf-%d-proto-%d", | |
155 | PF_INET6, protocol); | |
156 | goto lookup_protocol; | |
157 | } else | |
158 | goto out_rcu_unlock; | |
159 | } | |
160 | ||
161 | err = -EPERM; | |
c84b3268 | 162 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
1da177e4 | 163 | goto out_rcu_unlock; |
1da177e4 LT |
164 | |
165 | sock->ops = answer->ops; | |
1da177e4 LT |
166 | answer_prot = answer->prot; |
167 | answer_no_check = answer->no_check; | |
168 | answer_flags = answer->flags; | |
169 | rcu_read_unlock(); | |
170 | ||
547b792c | 171 | WARN_ON(answer_prot->slab == NULL); |
1da177e4 | 172 | |
af1afe86 | 173 | err = -ENOBUFS; |
6257ff21 | 174 | sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot); |
1da177e4 LT |
175 | if (sk == NULL) |
176 | goto out; | |
177 | ||
178 | sock_init_data(sock, sk); | |
179 | ||
af1afe86 | 180 | err = 0; |
1da177e4 LT |
181 | sk->sk_no_check = answer_no_check; |
182 | if (INET_PROTOSW_REUSE & answer_flags) | |
4a17fd52 | 183 | sk->sk_reuse = SK_CAN_REUSE; |
1da177e4 LT |
184 | |
185 | inet = inet_sk(sk); | |
469de9b9 | 186 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
1da177e4 LT |
187 | |
188 | if (SOCK_RAW == sock->type) { | |
c720c7e8 | 189 | inet->inet_num = protocol; |
1da177e4 LT |
190 | if (IPPROTO_RAW == protocol) |
191 | inet->hdrincl = 1; | |
192 | } | |
193 | ||
e6848976 | 194 | sk->sk_destruct = inet_sock_destruct; |
1da177e4 LT |
195 | sk->sk_family = PF_INET6; |
196 | sk->sk_protocol = protocol; | |
197 | ||
198 | sk->sk_backlog_rcv = answer->prot->backlog_rcv; | |
199 | ||
200 | inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); | |
201 | np->hop_limit = -1; | |
f935aa9e | 202 | np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; |
1da177e4 LT |
203 | np->mc_loop = 1; |
204 | np->pmtudisc = IPV6_PMTUDISC_WANT; | |
2e761e05 | 205 | np->ipv6only = net->ipv6.sysctl.bindv6only; |
1ab1457c | 206 | |
1da177e4 LT |
207 | /* Init the ipv4 part of the socket since we can have sockets |
208 | * using v6 API for ipv4. | |
209 | */ | |
210 | inet->uc_ttl = -1; | |
211 | ||
212 | inet->mc_loop = 1; | |
213 | inet->mc_ttl = 1; | |
214 | inet->mc_index = 0; | |
215 | inet->mc_list = NULL; | |
4c507d28 | 216 | inet->rcv_tos = 0; |
1da177e4 LT |
217 | |
218 | if (ipv4_config.no_pmtu_disc) | |
219 | inet->pmtudisc = IP_PMTUDISC_DONT; | |
220 | else | |
221 | inet->pmtudisc = IP_PMTUDISC_WANT; | |
1ab1457c | 222 | /* |
e6848976 ACM |
223 | * Increment only the relevant sk_prot->socks debug field, this changes |
224 | * the previous behaviour of incrementing both the equivalent to | |
225 | * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. | |
226 | * | |
227 | * This allows better debug granularity as we'll know exactly how many | |
228 | * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 | |
229 | * transport protocol socks. -acme | |
230 | */ | |
231 | sk_refcnt_debug_inc(sk); | |
1da177e4 | 232 | |
c720c7e8 | 233 | if (inet->inet_num) { |
1da177e4 LT |
234 | /* It assumes that any protocol which allows |
235 | * the user to assign a number at socket | |
236 | * creation time automatically shares. | |
237 | */ | |
c720c7e8 | 238 | inet->inet_sport = htons(inet->inet_num); |
1da177e4 LT |
239 | sk->sk_prot->hash(sk); |
240 | } | |
241 | if (sk->sk_prot->init) { | |
af1afe86 YH |
242 | err = sk->sk_prot->init(sk); |
243 | if (err) { | |
1da177e4 LT |
244 | sk_common_release(sk); |
245 | goto out; | |
246 | } | |
247 | } | |
248 | out: | |
af1afe86 | 249 | return err; |
1da177e4 LT |
250 | out_rcu_unlock: |
251 | rcu_read_unlock(); | |
252 | goto out; | |
253 | } | |
254 | ||
255 | ||
256 | /* bind for INET6 API */ | |
257 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
258 | { | |
647c0c70 | 259 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr; |
1da177e4 LT |
260 | struct sock *sk = sock->sk; |
261 | struct inet_sock *inet = inet_sk(sk); | |
262 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 263 | struct net *net = sock_net(sk); |
fd683222 | 264 | __be32 v4addr = 0; |
1da177e4 LT |
265 | unsigned short snum; |
266 | int addr_type = 0; | |
267 | int err = 0; | |
268 | ||
269 | /* If the socket has its own bind function then use it. */ | |
270 | if (sk->sk_prot->bind) | |
271 | return sk->sk_prot->bind(sk, uaddr, addr_len); | |
272 | ||
273 | if (addr_len < SIN6_LEN_RFC2133) | |
274 | return -EINVAL; | |
5a079c30 MM |
275 | |
276 | if (addr->sin6_family != AF_INET6) | |
c349a528 | 277 | return -EAFNOSUPPORT; |
5a079c30 | 278 | |
1da177e4 LT |
279 | addr_type = ipv6_addr_type(&addr->sin6_addr); |
280 | if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) | |
281 | return -EINVAL; | |
282 | ||
283 | snum = ntohs(addr->sin6_port); | |
284 | if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
285 | return -EACCES; | |
286 | ||
287 | lock_sock(sk); | |
288 | ||
289 | /* Check these errors (active socket, double bind). */ | |
c720c7e8 | 290 | if (sk->sk_state != TCP_CLOSE || inet->inet_num) { |
1da177e4 LT |
291 | err = -EINVAL; |
292 | goto out; | |
293 | } | |
294 | ||
295 | /* Check if the address belongs to the host. */ | |
296 | if (addr_type == IPV6_ADDR_MAPPED) { | |
63d9950b VY |
297 | int chk_addr_ret; |
298 | ||
783ed5a7 VY |
299 | /* Binding to v4-mapped address on a v6-only socket |
300 | * makes no sense | |
301 | */ | |
302 | if (np->ipv6only) { | |
303 | err = -EINVAL; | |
304 | goto out; | |
305 | } | |
63d9950b | 306 | |
a34f0b31 | 307 | /* Reproduce AF_INET checks to make the bindings consistent */ |
1da177e4 | 308 | v4addr = addr->sin6_addr.s6_addr32[3]; |
63d9950b VY |
309 | chk_addr_ret = inet_addr_type(net, v4addr); |
310 | if (!sysctl_ip_nonlocal_bind && | |
311 | !(inet->freebind || inet->transparent) && | |
312 | v4addr != htonl(INADDR_ANY) && | |
313 | chk_addr_ret != RTN_LOCAL && | |
314 | chk_addr_ret != RTN_MULTICAST && | |
ca6982b8 BP |
315 | chk_addr_ret != RTN_BROADCAST) { |
316 | err = -EADDRNOTAVAIL; | |
1da177e4 | 317 | goto out; |
ca6982b8 | 318 | } |
1da177e4 LT |
319 | } else { |
320 | if (addr_type != IPV6_ADDR_ANY) { | |
321 | struct net_device *dev = NULL; | |
322 | ||
16ba5e8e | 323 | rcu_read_lock(); |
1da177e4 LT |
324 | if (addr_type & IPV6_ADDR_LINKLOCAL) { |
325 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
326 | addr->sin6_scope_id) { | |
327 | /* Override any existing binding, if another one | |
328 | * is supplied by user. | |
329 | */ | |
330 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
331 | } | |
1ab1457c | 332 | |
1da177e4 LT |
333 | /* Binding to link-local address requires an interface */ |
334 | if (!sk->sk_bound_dev_if) { | |
335 | err = -EINVAL; | |
16ba5e8e | 336 | goto out_unlock; |
1da177e4 | 337 | } |
16ba5e8e | 338 | dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); |
1da177e4 LT |
339 | if (!dev) { |
340 | err = -ENODEV; | |
16ba5e8e | 341 | goto out_unlock; |
1da177e4 LT |
342 | } |
343 | } | |
344 | ||
345 | /* ipv4 addr of the socket is invalid. Only the | |
346 | * unspecified and mapped address have a v4 equivalent. | |
347 | */ | |
348 | v4addr = LOOPBACK4_IPV6; | |
349 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
f74024d9 | 350 | if (!(inet->freebind || inet->transparent) && |
0a513f6a | 351 | !ipv6_chk_addr(net, &addr->sin6_addr, |
bfeade08 | 352 | dev, 0)) { |
1da177e4 | 353 | err = -EADDRNOTAVAIL; |
16ba5e8e | 354 | goto out_unlock; |
1da177e4 LT |
355 | } |
356 | } | |
16ba5e8e | 357 | rcu_read_unlock(); |
1da177e4 LT |
358 | } |
359 | } | |
360 | ||
c720c7e8 ED |
361 | inet->inet_rcv_saddr = v4addr; |
362 | inet->inet_saddr = v4addr; | |
1da177e4 | 363 | |
4e3fd7a0 | 364 | np->rcv_saddr = addr->sin6_addr; |
1ab1457c | 365 | |
1da177e4 | 366 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
4e3fd7a0 | 367 | np->saddr = addr->sin6_addr; |
1da177e4 LT |
368 | |
369 | /* Make sure we are allowed to bind here. */ | |
370 | if (sk->sk_prot->get_port(sk, snum)) { | |
371 | inet_reset_saddr(sk); | |
372 | err = -EADDRINUSE; | |
373 | goto out; | |
374 | } | |
375 | ||
0f8d3c7a | 376 | if (addr_type != IPV6_ADDR_ANY) { |
1da177e4 | 377 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
0f8d3c7a VY |
378 | if (addr_type != IPV6_ADDR_MAPPED) |
379 | np->ipv6only = 1; | |
380 | } | |
1da177e4 LT |
381 | if (snum) |
382 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
c720c7e8 ED |
383 | inet->inet_sport = htons(inet->inet_num); |
384 | inet->inet_dport = 0; | |
385 | inet->inet_daddr = 0; | |
1da177e4 LT |
386 | out: |
387 | release_sock(sk); | |
388 | return err; | |
16ba5e8e ED |
389 | out_unlock: |
390 | rcu_read_unlock(); | |
391 | goto out; | |
1da177e4 | 392 | } |
7159039a YH |
393 | EXPORT_SYMBOL(inet6_bind); |
394 | ||
1da177e4 LT |
395 | int inet6_release(struct socket *sock) |
396 | { | |
397 | struct sock *sk = sock->sk; | |
398 | ||
399 | if (sk == NULL) | |
400 | return -EINVAL; | |
401 | ||
402 | /* Free mc lists */ | |
403 | ipv6_sock_mc_close(sk); | |
404 | ||
405 | /* Free ac lists */ | |
406 | ipv6_sock_ac_close(sk); | |
407 | ||
408 | return inet_release(sock); | |
409 | } | |
7159039a YH |
410 | EXPORT_SYMBOL(inet6_release); |
411 | ||
7d06b2e0 | 412 | void inet6_destroy_sock(struct sock *sk) |
1da177e4 LT |
413 | { |
414 | struct ipv6_pinfo *np = inet6_sk(sk); | |
415 | struct sk_buff *skb; | |
416 | struct ipv6_txoptions *opt; | |
417 | ||
1da177e4 LT |
418 | /* Release rx options */ |
419 | ||
647c0c70 EZ |
420 | skb = xchg(&np->pktoptions, NULL); |
421 | if (skb != NULL) | |
1da177e4 | 422 | kfree_skb(skb); |
4b340ae2 | 423 | |
647c0c70 EZ |
424 | skb = xchg(&np->rxpmtu, NULL); |
425 | if (skb != NULL) | |
4b340ae2 | 426 | kfree_skb(skb); |
1da177e4 LT |
427 | |
428 | /* Free flowlabels */ | |
429 | fl6_free_socklist(sk); | |
430 | ||
431 | /* Free tx options */ | |
432 | ||
647c0c70 EZ |
433 | opt = xchg(&np->opt, NULL); |
434 | if (opt != NULL) | |
1da177e4 | 435 | sock_kfree_s(sk, opt, opt->tot_len); |
1da177e4 | 436 | } |
3cf3dc6c ACM |
437 | EXPORT_SYMBOL_GPL(inet6_destroy_sock); |
438 | ||
1da177e4 LT |
439 | /* |
440 | * This does both peername and sockname. | |
441 | */ | |
1ab1457c | 442 | |
1da177e4 LT |
443 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
444 | int *uaddr_len, int peer) | |
445 | { | |
647c0c70 | 446 | struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr; |
1da177e4 LT |
447 | struct sock *sk = sock->sk; |
448 | struct inet_sock *inet = inet_sk(sk); | |
449 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1ab1457c | 450 | |
1da177e4 LT |
451 | sin->sin6_family = AF_INET6; |
452 | sin->sin6_flowinfo = 0; | |
453 | sin->sin6_scope_id = 0; | |
454 | if (peer) { | |
c720c7e8 | 455 | if (!inet->inet_dport) |
1da177e4 LT |
456 | return -ENOTCONN; |
457 | if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && | |
458 | peer == 1) | |
459 | return -ENOTCONN; | |
c720c7e8 | 460 | sin->sin6_port = inet->inet_dport; |
4e3fd7a0 | 461 | sin->sin6_addr = np->daddr; |
1da177e4 LT |
462 | if (np->sndflow) |
463 | sin->sin6_flowinfo = np->flow_label; | |
464 | } else { | |
465 | if (ipv6_addr_any(&np->rcv_saddr)) | |
4e3fd7a0 | 466 | sin->sin6_addr = np->saddr; |
1da177e4 | 467 | else |
4e3fd7a0 | 468 | sin->sin6_addr = np->rcv_saddr; |
1da177e4 | 469 | |
c720c7e8 | 470 | sin->sin6_port = inet->inet_sport; |
1da177e4 LT |
471 | } |
472 | if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
473 | sin->sin6_scope_id = sk->sk_bound_dev_if; | |
474 | *uaddr_len = sizeof(*sin); | |
a02cec21 | 475 | return 0; |
1da177e4 | 476 | } |
7159039a YH |
477 | EXPORT_SYMBOL(inet6_getname); |
478 | ||
1da177e4 LT |
479 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
480 | { | |
481 | struct sock *sk = sock->sk; | |
3b1e0a65 | 482 | struct net *net = sock_net(sk); |
1da177e4 | 483 | |
647c0c70 | 484 | switch (cmd) { |
1da177e4 LT |
485 | case SIOCGSTAMP: |
486 | return sock_get_timestamp(sk, (struct timeval __user *)arg); | |
487 | ||
ae40eb1e ED |
488 | case SIOCGSTAMPNS: |
489 | return sock_get_timestampns(sk, (struct timespec __user *)arg); | |
490 | ||
1da177e4 LT |
491 | case SIOCADDRT: |
492 | case SIOCDELRT: | |
1ab1457c | 493 | |
a02cec21 | 494 | return ipv6_route_ioctl(net, cmd, (void __user *)arg); |
1da177e4 LT |
495 | |
496 | case SIOCSIFADDR: | |
af284937 | 497 | return addrconf_add_ifaddr(net, (void __user *) arg); |
1da177e4 | 498 | case SIOCDIFADDR: |
af284937 | 499 | return addrconf_del_ifaddr(net, (void __user *) arg); |
1da177e4 | 500 | case SIOCSIFDSTADDR: |
af284937 | 501 | return addrconf_set_dstaddr(net, (void __user *) arg); |
1da177e4 | 502 | default: |
b5e5fa5e CH |
503 | if (!sk->sk_prot->ioctl) |
504 | return -ENOIOCTLCMD; | |
505 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
1da177e4 LT |
506 | } |
507 | /*NOTREACHED*/ | |
a02cec21 | 508 | return 0; |
1da177e4 | 509 | } |
7159039a YH |
510 | EXPORT_SYMBOL(inet6_ioctl); |
511 | ||
90ddc4f0 | 512 | const struct proto_ops inet6_stream_ops = { |
543d9cfe ACM |
513 | .family = PF_INET6, |
514 | .owner = THIS_MODULE, | |
515 | .release = inet6_release, | |
516 | .bind = inet6_bind, | |
517 | .connect = inet_stream_connect, /* ok */ | |
518 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
519 | .accept = inet_accept, /* ok */ | |
520 | .getname = inet6_getname, | |
521 | .poll = tcp_poll, /* ok */ | |
522 | .ioctl = inet6_ioctl, /* must change */ | |
523 | .listen = inet_listen, /* ok */ | |
524 | .shutdown = inet_shutdown, /* ok */ | |
525 | .setsockopt = sock_common_setsockopt, /* ok */ | |
526 | .getsockopt = sock_common_getsockopt, /* ok */ | |
7ba42910 CG |
527 | .sendmsg = inet_sendmsg, /* ok */ |
528 | .recvmsg = inet_recvmsg, /* ok */ | |
543d9cfe | 529 | .mmap = sock_no_mmap, |
7ba42910 | 530 | .sendpage = inet_sendpage, |
a0974dd3 | 531 | .splice_read = tcp_splice_read, |
3fdadf7d | 532 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
533 | .compat_setsockopt = compat_sock_common_setsockopt, |
534 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 535 | #endif |
1da177e4 LT |
536 | }; |
537 | ||
90ddc4f0 | 538 | const struct proto_ops inet6_dgram_ops = { |
543d9cfe ACM |
539 | .family = PF_INET6, |
540 | .owner = THIS_MODULE, | |
541 | .release = inet6_release, | |
542 | .bind = inet6_bind, | |
543 | .connect = inet_dgram_connect, /* ok */ | |
544 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
545 | .accept = sock_no_accept, /* a do nothing */ | |
546 | .getname = inet6_getname, | |
547 | .poll = udp_poll, /* ok */ | |
548 | .ioctl = inet6_ioctl, /* must change */ | |
549 | .listen = sock_no_listen, /* ok */ | |
550 | .shutdown = inet_shutdown, /* ok */ | |
551 | .setsockopt = sock_common_setsockopt, /* ok */ | |
552 | .getsockopt = sock_common_getsockopt, /* ok */ | |
553 | .sendmsg = inet_sendmsg, /* ok */ | |
7ba42910 | 554 | .recvmsg = inet_recvmsg, /* ok */ |
543d9cfe ACM |
555 | .mmap = sock_no_mmap, |
556 | .sendpage = sock_no_sendpage, | |
3fdadf7d | 557 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
558 | .compat_setsockopt = compat_sock_common_setsockopt, |
559 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 560 | #endif |
1da177e4 LT |
561 | }; |
562 | ||
ec1b4cf7 | 563 | static const struct net_proto_family inet6_family_ops = { |
1da177e4 LT |
564 | .family = PF_INET6, |
565 | .create = inet6_create, | |
566 | .owner = THIS_MODULE, | |
567 | }; | |
568 | ||
87c3efbf | 569 | int inet6_register_protosw(struct inet_protosw *p) |
1da177e4 LT |
570 | { |
571 | struct list_head *lh; | |
572 | struct inet_protosw *answer; | |
1da177e4 | 573 | struct list_head *last_perm; |
87c3efbf DL |
574 | int protocol = p->protocol; |
575 | int ret; | |
1da177e4 LT |
576 | |
577 | spin_lock_bh(&inetsw6_lock); | |
578 | ||
87c3efbf | 579 | ret = -EINVAL; |
1da177e4 LT |
580 | if (p->type >= SOCK_MAX) |
581 | goto out_illegal; | |
582 | ||
583 | /* If we are trying to override a permanent protocol, bail. */ | |
584 | answer = NULL; | |
87c3efbf | 585 | ret = -EPERM; |
1da177e4 LT |
586 | last_perm = &inetsw6[p->type]; |
587 | list_for_each(lh, &inetsw6[p->type]) { | |
588 | answer = list_entry(lh, struct inet_protosw, list); | |
589 | ||
590 | /* Check only the non-wild match. */ | |
591 | if (INET_PROTOSW_PERMANENT & answer->flags) { | |
592 | if (protocol == answer->protocol) | |
593 | break; | |
594 | last_perm = lh; | |
595 | } | |
596 | ||
597 | answer = NULL; | |
598 | } | |
599 | if (answer) | |
600 | goto out_permanent; | |
601 | ||
602 | /* Add the new entry after the last permanent entry if any, so that | |
603 | * the new entry does not override a permanent entry when matched with | |
604 | * a wild-card protocol. But it is allowed to override any existing | |
1ab1457c | 605 | * non-permanent entry. This means that when we remove this entry, the |
1da177e4 LT |
606 | * system automatically returns to the old behavior. |
607 | */ | |
608 | list_add_rcu(&p->list, last_perm); | |
87c3efbf | 609 | ret = 0; |
1da177e4 LT |
610 | out: |
611 | spin_unlock_bh(&inetsw6_lock); | |
87c3efbf | 612 | return ret; |
1da177e4 LT |
613 | |
614 | out_permanent: | |
615 | printk(KERN_ERR "Attempt to override permanent protocol %d.\n", | |
616 | protocol); | |
617 | goto out; | |
618 | ||
619 | out_illegal: | |
620 | printk(KERN_ERR | |
621 | "Ignoring attempt to register invalid socket type %d.\n", | |
622 | p->type); | |
623 | goto out; | |
624 | } | |
7159039a YH |
625 | EXPORT_SYMBOL(inet6_register_protosw); |
626 | ||
1da177e4 LT |
627 | void |
628 | inet6_unregister_protosw(struct inet_protosw *p) | |
629 | { | |
630 | if (INET_PROTOSW_PERMANENT & p->flags) { | |
631 | printk(KERN_ERR | |
632 | "Attempt to unregister permanent protocol %d.\n", | |
633 | p->protocol); | |
634 | } else { | |
635 | spin_lock_bh(&inetsw6_lock); | |
636 | list_del_rcu(&p->list); | |
637 | spin_unlock_bh(&inetsw6_lock); | |
638 | ||
639 | synchronize_net(); | |
640 | } | |
641 | } | |
7159039a YH |
642 | EXPORT_SYMBOL(inet6_unregister_protosw); |
643 | ||
b9750ce1 ACM |
644 | int inet6_sk_rebuild_header(struct sock *sk) |
645 | { | |
b9750ce1 | 646 | struct ipv6_pinfo *np = inet6_sk(sk); |
68d0c6d3 | 647 | struct dst_entry *dst; |
b9750ce1 ACM |
648 | |
649 | dst = __sk_dst_check(sk, np->dst_cookie); | |
650 | ||
651 | if (dst == NULL) { | |
652 | struct inet_sock *inet = inet_sk(sk); | |
20c59de2 | 653 | struct in6_addr *final_p, final; |
4c9483b2 DM |
654 | struct flowi6 fl6; |
655 | ||
656 | memset(&fl6, 0, sizeof(fl6)); | |
657 | fl6.flowi6_proto = sk->sk_protocol; | |
4e3fd7a0 AD |
658 | fl6.daddr = np->daddr; |
659 | fl6.saddr = np->saddr; | |
4c9483b2 DM |
660 | fl6.flowlabel = np->flow_label; |
661 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
662 | fl6.flowi6_mark = sk->sk_mark; | |
1958b856 DM |
663 | fl6.fl6_dport = inet->inet_dport; |
664 | fl6.fl6_sport = inet->inet_sport; | |
4c9483b2 DM |
665 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
666 | ||
667 | final_p = fl6_update_dst(&fl6, np->opt, &final); | |
668 | ||
669 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false); | |
68d0c6d3 | 670 | if (IS_ERR(dst)) { |
b9750ce1 | 671 | sk->sk_route_caps = 0; |
68d0c6d3 DM |
672 | sk->sk_err_soft = -PTR_ERR(dst); |
673 | return PTR_ERR(dst); | |
b9750ce1 ACM |
674 | } |
675 | ||
8e1ef0a9 | 676 | __ip6_dst_store(sk, dst, NULL, NULL); |
b9750ce1 ACM |
677 | } |
678 | ||
679 | return 0; | |
680 | } | |
b9750ce1 ACM |
681 | EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); |
682 | ||
399c07de ACM |
683 | int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb) |
684 | { | |
685 | struct ipv6_pinfo *np = inet6_sk(sk); | |
686 | struct inet6_skb_parm *opt = IP6CB(skb); | |
687 | ||
688 | if (np->rxopt.all) { | |
689 | if ((opt->hop && (np->rxopt.bits.hopopts || | |
690 | np->rxopt.bits.ohopopts)) || | |
d56f90a7 ACM |
691 | ((IPV6_FLOWINFO_MASK & |
692 | *(__be32 *)skb_network_header(skb)) && | |
399c07de ACM |
693 | np->rxopt.bits.rxflow) || |
694 | (opt->srcrt && (np->rxopt.bits.srcrt || | |
695 | np->rxopt.bits.osrcrt)) || | |
696 | ((opt->dst1 || opt->dst0) && | |
697 | (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) | |
698 | return 1; | |
699 | } | |
700 | return 0; | |
701 | } | |
399c07de ACM |
702 | EXPORT_SYMBOL_GPL(ipv6_opt_accepted); |
703 | ||
787e9208 | 704 | static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto) |
662397fd | 705 | { |
41135cc8 | 706 | const struct inet6_protocol *ops = NULL; |
662397fd YH |
707 | |
708 | for (;;) { | |
709 | struct ipv6_opt_hdr *opth; | |
710 | int len; | |
711 | ||
712 | if (proto != NEXTHDR_HOP) { | |
713 | ops = rcu_dereference(inet6_protos[proto]); | |
714 | ||
715 | if (unlikely(!ops)) | |
716 | break; | |
717 | ||
718 | if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) | |
719 | break; | |
720 | } | |
721 | ||
722 | if (unlikely(!pskb_may_pull(skb, 8))) | |
723 | break; | |
724 | ||
725 | opth = (void *)skb->data; | |
726 | len = ipv6_optlen(opth); | |
727 | ||
728 | if (unlikely(!pskb_may_pull(skb, len))) | |
729 | break; | |
730 | ||
731 | proto = opth->nexthdr; | |
732 | __skb_pull(skb, len); | |
733 | } | |
734 | ||
787e9208 | 735 | return proto; |
662397fd YH |
736 | } |
737 | ||
738 | static int ipv6_gso_send_check(struct sk_buff *skb) | |
739 | { | |
b71d1d42 | 740 | const struct ipv6hdr *ipv6h; |
41135cc8 | 741 | const struct inet6_protocol *ops; |
662397fd YH |
742 | int err = -EINVAL; |
743 | ||
744 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
745 | goto out; | |
746 | ||
747 | ipv6h = ipv6_hdr(skb); | |
748 | __skb_pull(skb, sizeof(*ipv6h)); | |
749 | err = -EPROTONOSUPPORT; | |
750 | ||
751 | rcu_read_lock(); | |
787e9208 HX |
752 | ops = rcu_dereference(inet6_protos[ |
753 | ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); | |
754 | ||
662397fd YH |
755 | if (likely(ops && ops->gso_send_check)) { |
756 | skb_reset_transport_header(skb); | |
757 | err = ops->gso_send_check(skb); | |
758 | } | |
759 | rcu_read_unlock(); | |
760 | ||
761 | out: | |
762 | return err; | |
763 | } | |
764 | ||
c8f44aff MM |
765 | static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, |
766 | netdev_features_t features) | |
662397fd YH |
767 | { |
768 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
769 | struct ipv6hdr *ipv6h; | |
41135cc8 | 770 | const struct inet6_protocol *ops; |
ba735425 SS |
771 | int proto; |
772 | struct frag_hdr *fptr; | |
773 | unsigned int unfrag_ip6hlen; | |
774 | u8 *prevhdr; | |
775 | int offset = 0; | |
662397fd YH |
776 | |
777 | if (!(features & NETIF_F_V6_CSUM)) | |
778 | features &= ~NETIF_F_SG; | |
779 | ||
780 | if (unlikely(skb_shinfo(skb)->gso_type & | |
781 | ~(SKB_GSO_UDP | | |
782 | SKB_GSO_DODGY | | |
783 | SKB_GSO_TCP_ECN | | |
784 | SKB_GSO_TCPV6 | | |
785 | 0))) | |
786 | goto out; | |
787 | ||
788 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
789 | goto out; | |
790 | ||
791 | ipv6h = ipv6_hdr(skb); | |
792 | __skb_pull(skb, sizeof(*ipv6h)); | |
793 | segs = ERR_PTR(-EPROTONOSUPPORT); | |
794 | ||
ba735425 | 795 | proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); |
662397fd | 796 | rcu_read_lock(); |
ba735425 | 797 | ops = rcu_dereference(inet6_protos[proto]); |
662397fd YH |
798 | if (likely(ops && ops->gso_segment)) { |
799 | skb_reset_transport_header(skb); | |
800 | segs = ops->gso_segment(skb, features); | |
801 | } | |
802 | rcu_read_unlock(); | |
803 | ||
376d940e | 804 | if (IS_ERR(segs)) |
662397fd YH |
805 | goto out; |
806 | ||
807 | for (skb = segs; skb; skb = skb->next) { | |
808 | ipv6h = ipv6_hdr(skb); | |
809 | ipv6h->payload_len = htons(skb->len - skb->mac_len - | |
810 | sizeof(*ipv6h)); | |
ba735425 SS |
811 | if (proto == IPPROTO_UDP) { |
812 | unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); | |
813 | fptr = (struct frag_hdr *)(skb_network_header(skb) + | |
814 | unfrag_ip6hlen); | |
815 | fptr->frag_off = htons(offset); | |
816 | if (skb->next != NULL) | |
817 | fptr->frag_off |= htons(IP6_MF); | |
818 | offset += (ntohs(ipv6h->payload_len) - | |
819 | sizeof(struct frag_hdr)); | |
820 | } | |
662397fd YH |
821 | } |
822 | ||
823 | out: | |
824 | return segs; | |
825 | } | |
826 | ||
787e9208 HX |
827 | struct ipv6_gro_cb { |
828 | struct napi_gro_cb napi; | |
829 | int proto; | |
830 | }; | |
831 | ||
832 | #define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb) | |
833 | ||
834 | static struct sk_buff **ipv6_gro_receive(struct sk_buff **head, | |
835 | struct sk_buff *skb) | |
836 | { | |
41135cc8 | 837 | const struct inet6_protocol *ops; |
787e9208 HX |
838 | struct sk_buff **pp = NULL; |
839 | struct sk_buff *p; | |
840 | struct ipv6hdr *iph; | |
841 | unsigned int nlen; | |
a5b1cf28 HX |
842 | unsigned int hlen; |
843 | unsigned int off; | |
787e9208 HX |
844 | int flush = 1; |
845 | int proto; | |
ebad18e9 | 846 | __wsum csum; |
787e9208 | 847 | |
a5b1cf28 HX |
848 | off = skb_gro_offset(skb); |
849 | hlen = off + sizeof(*iph); | |
850 | iph = skb_gro_header_fast(skb, off); | |
851 | if (skb_gro_header_hard(skb, hlen)) { | |
852 | iph = skb_gro_header_slow(skb, hlen, off); | |
853 | if (unlikely(!iph)) | |
854 | goto out; | |
855 | } | |
787e9208 | 856 | |
86911732 HX |
857 | skb_gro_pull(skb, sizeof(*iph)); |
858 | skb_set_transport_header(skb, skb_gro_offset(skb)); | |
787e9208 | 859 | |
86911732 | 860 | flush += ntohs(iph->payload_len) != skb_gro_len(skb); |
787e9208 HX |
861 | |
862 | rcu_read_lock(); | |
86911732 | 863 | proto = iph->nexthdr; |
787e9208 | 864 | ops = rcu_dereference(inet6_protos[proto]); |
86911732 HX |
865 | if (!ops || !ops->gro_receive) { |
866 | __pskb_pull(skb, skb_gro_offset(skb)); | |
867 | proto = ipv6_gso_pull_exthdrs(skb, proto); | |
868 | skb_gro_pull(skb, -skb_transport_offset(skb)); | |
869 | skb_reset_transport_header(skb); | |
870 | __skb_push(skb, skb_gro_offset(skb)); | |
871 | ||
cdaf5570 | 872 | ops = rcu_dereference(inet6_protos[proto]); |
86911732 HX |
873 | if (!ops || !ops->gro_receive) |
874 | goto out_unlock; | |
875 | ||
876 | iph = ipv6_hdr(skb); | |
877 | } | |
878 | ||
879 | IPV6_GRO_CB(skb)->proto = proto; | |
787e9208 HX |
880 | |
881 | flush--; | |
787e9208 HX |
882 | nlen = skb_network_header_len(skb); |
883 | ||
884 | for (p = *head; p; p = p->next) { | |
885 | struct ipv6hdr *iph2; | |
886 | ||
887 | if (!NAPI_GRO_CB(p)->same_flow) | |
888 | continue; | |
889 | ||
890 | iph2 = ipv6_hdr(p); | |
891 | ||
892 | /* All fields must match except length. */ | |
893 | if (nlen != skb_network_header_len(p) || | |
894 | memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) || | |
895 | memcmp(&iph->nexthdr, &iph2->nexthdr, | |
896 | nlen - offsetof(struct ipv6hdr, nexthdr))) { | |
897 | NAPI_GRO_CB(p)->same_flow = 0; | |
898 | continue; | |
899 | } | |
900 | ||
901 | NAPI_GRO_CB(p)->flush |= flush; | |
902 | } | |
903 | ||
904 | NAPI_GRO_CB(skb)->flush |= flush; | |
905 | ||
ebad18e9 HX |
906 | csum = skb->csum; |
907 | skb_postpull_rcsum(skb, iph, skb_network_header_len(skb)); | |
908 | ||
787e9208 HX |
909 | pp = ops->gro_receive(head, skb); |
910 | ||
ebad18e9 HX |
911 | skb->csum = csum; |
912 | ||
787e9208 HX |
913 | out_unlock: |
914 | rcu_read_unlock(); | |
915 | ||
916 | out: | |
917 | NAPI_GRO_CB(skb)->flush |= flush; | |
918 | ||
919 | return pp; | |
920 | } | |
921 | ||
922 | static int ipv6_gro_complete(struct sk_buff *skb) | |
923 | { | |
41135cc8 | 924 | const struct inet6_protocol *ops; |
787e9208 HX |
925 | struct ipv6hdr *iph = ipv6_hdr(skb); |
926 | int err = -ENOSYS; | |
927 | ||
928 | iph->payload_len = htons(skb->len - skb_network_offset(skb) - | |
929 | sizeof(*iph)); | |
930 | ||
931 | rcu_read_lock(); | |
932 | ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]); | |
933 | if (WARN_ON(!ops || !ops->gro_complete)) | |
934 | goto out_unlock; | |
935 | ||
936 | err = ops->gro_complete(skb); | |
937 | ||
938 | out_unlock: | |
939 | rcu_read_unlock(); | |
940 | ||
941 | return err; | |
942 | } | |
943 | ||
7546dd97 | 944 | static struct packet_type ipv6_packet_type __read_mostly = { |
09640e63 | 945 | .type = cpu_to_be16(ETH_P_IPV6), |
662397fd YH |
946 | .func = ipv6_rcv, |
947 | .gso_send_check = ipv6_gso_send_check, | |
948 | .gso_segment = ipv6_gso_segment, | |
787e9208 HX |
949 | .gro_receive = ipv6_gro_receive, |
950 | .gro_complete = ipv6_gro_complete, | |
662397fd YH |
951 | }; |
952 | ||
953 | static int __init ipv6_packet_init(void) | |
954 | { | |
955 | dev_add_pack(&ipv6_packet_type); | |
956 | return 0; | |
957 | } | |
958 | ||
959 | static void ipv6_packet_cleanup(void) | |
960 | { | |
961 | dev_remove_pack(&ipv6_packet_type); | |
962 | } | |
963 | ||
e43291cb DL |
964 | static int __net_init ipv6_init_mibs(struct net *net) |
965 | { | |
7d720c3e | 966 | if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6, |
1823e4c8 ED |
967 | sizeof(struct udp_mib), |
968 | __alignof__(struct udp_mib)) < 0) | |
0c7ed677 | 969 | return -ENOMEM; |
7d720c3e | 970 | if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6, |
1823e4c8 ED |
971 | sizeof(struct udp_mib), |
972 | __alignof__(struct udp_mib)) < 0) | |
be713a44 | 973 | goto err_udplite_mib; |
7d720c3e | 974 | if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics, |
1823e4c8 ED |
975 | sizeof(struct ipstats_mib), |
976 | __alignof__(struct ipstats_mib)) < 0) | |
9261e537 | 977 | goto err_ip_mib; |
7d720c3e | 978 | if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics, |
1823e4c8 ED |
979 | sizeof(struct icmpv6_mib), |
980 | __alignof__(struct icmpv6_mib)) < 0) | |
9261e537 | 981 | goto err_icmp_mib; |
2a24444f ED |
982 | net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib), |
983 | GFP_KERNEL); | |
984 | if (!net->mib.icmpv6msg_statistics) | |
9261e537 | 985 | goto err_icmpmsg_mib; |
e43291cb | 986 | return 0; |
be713a44 | 987 | |
9261e537 | 988 | err_icmpmsg_mib: |
7d720c3e | 989 | snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); |
9261e537 | 990 | err_icmp_mib: |
7d720c3e | 991 | snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); |
9261e537 | 992 | err_ip_mib: |
7d720c3e | 993 | snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); |
be713a44 | 994 | err_udplite_mib: |
7d720c3e | 995 | snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); |
be713a44 | 996 | return -ENOMEM; |
e43291cb DL |
997 | } |
998 | ||
2c8c1e72 | 999 | static void ipv6_cleanup_mibs(struct net *net) |
e43291cb | 1000 | { |
7d720c3e TH |
1001 | snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); |
1002 | snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); | |
1003 | snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); | |
1004 | snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); | |
2a24444f | 1005 | kfree(net->mib.icmpv6msg_statistics); |
e43291cb DL |
1006 | } |
1007 | ||
e7dc8494 | 1008 | static int __net_init inet6_net_init(struct net *net) |
81c1c178 | 1009 | { |
0c96d8c5 DL |
1010 | int err = 0; |
1011 | ||
99bc9c4e | 1012 | net->ipv6.sysctl.bindv6only = 0; |
41a76906 | 1013 | net->ipv6.sysctl.icmpv6_time = 1*HZ; |
e71e0349 | 1014 | |
e43291cb DL |
1015 | err = ipv6_init_mibs(net); |
1016 | if (err) | |
1017 | return err; | |
0c96d8c5 DL |
1018 | #ifdef CONFIG_PROC_FS |
1019 | err = udp6_proc_init(net); | |
1020 | if (err) | |
1021 | goto out; | |
6f8b13bc DL |
1022 | err = tcp6_proc_init(net); |
1023 | if (err) | |
1024 | goto proc_tcp6_fail; | |
6ab57e7e DL |
1025 | err = ac6_proc_init(net); |
1026 | if (err) | |
1027 | goto proc_ac6_fail; | |
0c96d8c5 DL |
1028 | #endif |
1029 | return err; | |
6f8b13bc DL |
1030 | |
1031 | #ifdef CONFIG_PROC_FS | |
6ab57e7e DL |
1032 | proc_ac6_fail: |
1033 | tcp6_proc_exit(net); | |
6f8b13bc DL |
1034 | proc_tcp6_fail: |
1035 | udp6_proc_exit(net); | |
e43291cb DL |
1036 | out: |
1037 | ipv6_cleanup_mibs(net); | |
1038 | return err; | |
6f8b13bc | 1039 | #endif |
81c1c178 DL |
1040 | } |
1041 | ||
2c8c1e72 | 1042 | static void __net_exit inet6_net_exit(struct net *net) |
81c1c178 | 1043 | { |
0c96d8c5 DL |
1044 | #ifdef CONFIG_PROC_FS |
1045 | udp6_proc_exit(net); | |
6f8b13bc | 1046 | tcp6_proc_exit(net); |
6ab57e7e | 1047 | ac6_proc_exit(net); |
0c96d8c5 | 1048 | #endif |
e43291cb | 1049 | ipv6_cleanup_mibs(net); |
81c1c178 DL |
1050 | } |
1051 | ||
1052 | static struct pernet_operations inet6_net_ops = { | |
1053 | .init = inet6_net_init, | |
1054 | .exit = inet6_net_exit, | |
1055 | }; | |
1056 | ||
1da177e4 LT |
1057 | static int __init inet6_init(void) |
1058 | { | |
1059 | struct sk_buff *dummy_skb; | |
1ab1457c | 1060 | struct list_head *r; |
fe7ca2e1 | 1061 | int err = 0; |
1da177e4 | 1062 | |
ef047f5e YH |
1063 | BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)); |
1064 | ||
fe7ca2e1 | 1065 | /* Register the socket-side information for inet6_create. */ |
647c0c70 | 1066 | for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) |
fe7ca2e1 BH |
1067 | INIT_LIST_HEAD(r); |
1068 | ||
56d417b1 | 1069 | if (disable_ipv6_mod) { |
fe7ca2e1 BH |
1070 | printk(KERN_INFO |
1071 | "IPv6: Loaded, but administratively disabled, " | |
1072 | "reboot required to enable\n"); | |
1073 | goto out; | |
1074 | } | |
1075 | ||
1da177e4 LT |
1076 | err = proto_register(&tcpv6_prot, 1); |
1077 | if (err) | |
1078 | goto out; | |
1079 | ||
1080 | err = proto_register(&udpv6_prot, 1); | |
1081 | if (err) | |
1082 | goto out_unregister_tcp_proto; | |
1083 | ||
ba4e58ec | 1084 | err = proto_register(&udplitev6_prot, 1); |
1da177e4 LT |
1085 | if (err) |
1086 | goto out_unregister_udp_proto; | |
1087 | ||
ba4e58ec GR |
1088 | err = proto_register(&rawv6_prot, 1); |
1089 | if (err) | |
1090 | goto out_unregister_udplite_proto; | |
1091 | ||
1da177e4 | 1092 | |
1da177e4 LT |
1093 | /* We MUST register RAW sockets before we create the ICMP6, |
1094 | * IGMP6, or NDISC control sockets. | |
1095 | */ | |
7f4e4868 DL |
1096 | err = rawv6_init(); |
1097 | if (err) | |
1098 | goto out_unregister_raw_proto; | |
1da177e4 LT |
1099 | |
1100 | /* Register the family here so that the init calls below will | |
1101 | * be able to create sockets. (?? is this dangerous ??) | |
1102 | */ | |
8eb55910 DM |
1103 | err = sock_register(&inet6_family_ops); |
1104 | if (err) | |
7f4e4868 | 1105 | goto out_sock_register_fail; |
1da177e4 | 1106 | |
3dc43e3e GC |
1107 | tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem; |
1108 | ||
1da177e4 LT |
1109 | /* |
1110 | * ipngwg API draft makes clear that the correct semantics | |
1111 | * for TCP and UDP is to consider one TCP and UDP instance | |
25985edc | 1112 | * in a host available by both INET and INET6 APIs and |
1da177e4 LT |
1113 | * able to communicate via both network protocols. |
1114 | */ | |
1115 | ||
81c1c178 DL |
1116 | err = register_pernet_subsys(&inet6_net_ops); |
1117 | if (err) | |
1118 | goto register_pernet_fail; | |
9b0f976f | 1119 | err = icmpv6_init(); |
1da177e4 LT |
1120 | if (err) |
1121 | goto icmp_fail; | |
623d1a1a WC |
1122 | err = ip6_mr_init(); |
1123 | if (err) | |
1124 | goto ipmr_fail; | |
9b0f976f | 1125 | err = ndisc_init(); |
1da177e4 LT |
1126 | if (err) |
1127 | goto ndisc_fail; | |
9b0f976f | 1128 | err = igmp6_init(); |
1da177e4 LT |
1129 | if (err) |
1130 | goto igmp_fail; | |
2cc7d573 HW |
1131 | err = ipv6_netfilter_init(); |
1132 | if (err) | |
1133 | goto netfilter_fail; | |
1da177e4 LT |
1134 | /* Create /proc/foo6 entries. */ |
1135 | #ifdef CONFIG_PROC_FS | |
1136 | err = -ENOMEM; | |
1137 | if (raw6_proc_init()) | |
1138 | goto proc_raw6_fail; | |
ba4e58ec GR |
1139 | if (udplite6_proc_init()) |
1140 | goto proc_udplite6_fail; | |
1da177e4 LT |
1141 | if (ipv6_misc_proc_init()) |
1142 | goto proc_misc6_fail; | |
1da177e4 LT |
1143 | if (if6_proc_init()) |
1144 | goto proc_if6_fail; | |
1145 | #endif | |
e2fddf5e DL |
1146 | err = ip6_route_init(); |
1147 | if (err) | |
1148 | goto ip6_route_fail; | |
0a3e78ac DL |
1149 | err = ip6_flowlabel_init(); |
1150 | if (err) | |
1151 | goto ip6_flowlabel_fail; | |
1da177e4 LT |
1152 | err = addrconf_init(); |
1153 | if (err) | |
1154 | goto addrconf_fail; | |
1da177e4 LT |
1155 | |
1156 | /* Init v6 extension headers. */ | |
248b238d DL |
1157 | err = ipv6_exthdrs_init(); |
1158 | if (err) | |
1159 | goto ipv6_exthdrs_fail; | |
1160 | ||
853cbbaa DL |
1161 | err = ipv6_frag_init(); |
1162 | if (err) | |
1163 | goto ipv6_frag_fail; | |
1da177e4 LT |
1164 | |
1165 | /* Init v6 transport protocols. */ | |
7f4e4868 DL |
1166 | err = udpv6_init(); |
1167 | if (err) | |
1168 | goto udpv6_fail; | |
e2ed4052 | 1169 | |
7f4e4868 DL |
1170 | err = udplitev6_init(); |
1171 | if (err) | |
1172 | goto udplitev6_fail; | |
1173 | ||
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 BT |
1181 | |
1182 | #ifdef CONFIG_SYSCTL | |
1183 | err = ipv6_sysctl_register(); | |
1184 | if (err) | |
1185 | goto sysctl_fail; | |
1186 | #endif | |
1da177e4 LT |
1187 | out: |
1188 | return err; | |
1189 | ||
94911fe3 BT |
1190 | #ifdef CONFIG_SYSCTL |
1191 | sysctl_fail: | |
1192 | ipv6_packet_cleanup(); | |
1193 | #endif | |
7f4e4868 DL |
1194 | ipv6_packet_fail: |
1195 | tcpv6_exit(); | |
1196 | tcpv6_fail: | |
1197 | udplitev6_exit(); | |
1198 | udplitev6_fail: | |
1199 | udpv6_exit(); | |
1200 | udpv6_fail: | |
1201 | ipv6_frag_exit(); | |
853cbbaa DL |
1202 | ipv6_frag_fail: |
1203 | ipv6_exthdrs_exit(); | |
248b238d DL |
1204 | ipv6_exthdrs_fail: |
1205 | addrconf_cleanup(); | |
1da177e4 LT |
1206 | addrconf_fail: |
1207 | ip6_flowlabel_cleanup(); | |
0a3e78ac | 1208 | ip6_flowlabel_fail: |
1da177e4 | 1209 | ip6_route_cleanup(); |
e2fddf5e | 1210 | ip6_route_fail: |
1da177e4 LT |
1211 | #ifdef CONFIG_PROC_FS |
1212 | if6_proc_exit(); | |
1213 | proc_if6_fail: | |
1da177e4 LT |
1214 | ipv6_misc_proc_exit(); |
1215 | proc_misc6_fail: | |
ba4e58ec GR |
1216 | udplite6_proc_exit(); |
1217 | proc_udplite6_fail: | |
1da177e4 LT |
1218 | raw6_proc_exit(); |
1219 | proc_raw6_fail: | |
1220 | #endif | |
2cc7d573 HW |
1221 | ipv6_netfilter_fini(); |
1222 | netfilter_fail: | |
1da177e4 LT |
1223 | igmp6_cleanup(); |
1224 | igmp_fail: | |
1225 | ndisc_cleanup(); | |
1226 | ndisc_fail: | |
623d1a1a WC |
1227 | ip6_mr_cleanup(); |
1228 | ipmr_fail: | |
1da177e4 LT |
1229 | icmpv6_cleanup(); |
1230 | icmp_fail: | |
81c1c178 DL |
1231 | unregister_pernet_subsys(&inet6_net_ops); |
1232 | register_pernet_fail: | |
8eb55910 | 1233 | sock_unregister(PF_INET6); |
e2fddf5e | 1234 | rtnl_unregister_all(PF_INET6); |
7f4e4868 DL |
1235 | out_sock_register_fail: |
1236 | rawv6_exit(); | |
1da177e4 LT |
1237 | out_unregister_raw_proto: |
1238 | proto_unregister(&rawv6_prot); | |
ba4e58ec GR |
1239 | out_unregister_udplite_proto: |
1240 | proto_unregister(&udplitev6_prot); | |
1da177e4 LT |
1241 | out_unregister_udp_proto: |
1242 | proto_unregister(&udpv6_prot); | |
1243 | out_unregister_tcp_proto: | |
1244 | proto_unregister(&tcpv6_prot); | |
1245 | goto out; | |
1246 | } | |
1247 | module_init(inet6_init); | |
1248 | ||
1249 | static void __exit inet6_exit(void) | |
1250 | { | |
56d417b1 | 1251 | if (disable_ipv6_mod) |
ff8cf9a9 JD |
1252 | return; |
1253 | ||
1da177e4 LT |
1254 | /* First of all disallow new sockets creation. */ |
1255 | sock_unregister(PF_INET6); | |
c127ea2c TG |
1256 | /* Disallow any further netlink messages */ |
1257 | rtnl_unregister_all(PF_INET6); | |
ca17c233 | 1258 | |
7f4e4868 DL |
1259 | udpv6_exit(); |
1260 | udplitev6_exit(); | |
1261 | tcpv6_exit(); | |
1262 | ||
ca17c233 JJ |
1263 | /* Cleanup code parts. */ |
1264 | ipv6_packet_cleanup(); | |
853cbbaa | 1265 | ipv6_frag_exit(); |
248b238d | 1266 | ipv6_exthdrs_exit(); |
ca17c233 JJ |
1267 | addrconf_cleanup(); |
1268 | ip6_flowlabel_cleanup(); | |
1269 | ip6_route_cleanup(); | |
1da177e4 | 1270 | #ifdef CONFIG_PROC_FS |
ca17c233 JJ |
1271 | |
1272 | /* Cleanup code parts. */ | |
1da177e4 | 1273 | if6_proc_exit(); |
1ab1457c | 1274 | ipv6_misc_proc_exit(); |
1ab1457c | 1275 | udplite6_proc_exit(); |
1ab1457c | 1276 | raw6_proc_exit(); |
2c8d7ca0 | 1277 | #endif |
2cc7d573 | 1278 | ipv6_netfilter_fini(); |
ca17c233 | 1279 | igmp6_cleanup(); |
1da177e4 | 1280 | ndisc_cleanup(); |
623d1a1a | 1281 | ip6_mr_cleanup(); |
1da177e4 | 1282 | icmpv6_cleanup(); |
7f4e4868 | 1283 | rawv6_exit(); |
94911fe3 | 1284 | |
81c1c178 | 1285 | unregister_pernet_subsys(&inet6_net_ops); |
1da177e4 | 1286 | proto_unregister(&rawv6_prot); |
ca17c233 | 1287 | proto_unregister(&udplitev6_prot); |
1da177e4 LT |
1288 | proto_unregister(&udpv6_prot); |
1289 | proto_unregister(&tcpv6_prot); | |
1f2ccd00 JDB |
1290 | |
1291 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ | |
1da177e4 LT |
1292 | } |
1293 | module_exit(inet6_exit); | |
1294 | ||
1295 | MODULE_ALIAS_NETPROTO(PF_INET6); |