Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * PF_INET6 socket protocol family | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * |
8 | * Adapted from linux/net/ipv4/af_inet.c | |
9 | * | |
1da177e4 LT |
10 | * Fixes: |
11 | * piggy, Karl Knutson : Socket protocol table | |
12 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
13 | * Arnaldo Melo : check proc_net_create return, cleanups | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License | |
17 | * as published by the Free Software Foundation; either version | |
18 | * 2 of the License, or (at your option) any later version. | |
19 | */ | |
20 | ||
21 | ||
22 | #include <linux/module.h> | |
4fc268d2 | 23 | #include <linux/capability.h> |
1da177e4 LT |
24 | #include <linux/errno.h> |
25 | #include <linux/types.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/in.h> | |
28 | #include <linux/kernel.h> | |
1da177e4 LT |
29 | #include <linux/timer.h> |
30 | #include <linux/string.h> | |
31 | #include <linux/sockios.h> | |
32 | #include <linux/net.h> | |
33 | #include <linux/fcntl.h> | |
34 | #include <linux/mm.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/proc_fs.h> | |
37 | #include <linux/stat.h> | |
38 | #include <linux/init.h> | |
39 | ||
40 | #include <linux/inet.h> | |
41 | #include <linux/netdevice.h> | |
42 | #include <linux/icmpv6.h> | |
2cc7d573 | 43 | #include <linux/netfilter_ipv6.h> |
1da177e4 LT |
44 | |
45 | #include <net/ip.h> | |
46 | #include <net/ipv6.h> | |
47 | #include <net/udp.h> | |
ba4e58ec | 48 | #include <net/udplite.h> |
1da177e4 LT |
49 | #include <net/tcp.h> |
50 | #include <net/ipip.h> | |
51 | #include <net/protocol.h> | |
52 | #include <net/inet_common.h> | |
1668e010 | 53 | #include <net/route.h> |
1da177e4 LT |
54 | #include <net/transp_v6.h> |
55 | #include <net/ip6_route.h> | |
56 | #include <net/addrconf.h> | |
57 | #ifdef CONFIG_IPV6_TUNNEL | |
58 | #include <net/ip6_tunnel.h> | |
59 | #endif | |
60 | ||
61 | #include <asm/uaccess.h> | |
62 | #include <asm/system.h> | |
7bc570c8 | 63 | #include <linux/mroute6.h> |
1da177e4 LT |
64 | |
65 | MODULE_AUTHOR("Cast of dozens"); | |
66 | MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); | |
67 | MODULE_LICENSE("GPL"); | |
68 | ||
f1267347 | 69 | /* The inetsw6 table contains everything that inet6_create needs to |
1da177e4 LT |
70 | * build a new socket. |
71 | */ | |
72 | static struct list_head inetsw6[SOCK_MAX]; | |
73 | static DEFINE_SPINLOCK(inetsw6_lock); | |
74 | ||
56d417b1 BH |
75 | struct ipv6_params ipv6_defaults = { |
76 | .disable_ipv6 = 0, | |
77 | .autoconf = 1, | |
78 | }; | |
79 | ||
80 | static int disable_ipv6_mod = 0; | |
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 | ||
1b8d7ae4 | 98 | static int inet6_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
99 | { |
100 | struct inet_sock *inet; | |
101 | struct ipv6_pinfo *np; | |
102 | struct sock *sk; | |
1da177e4 LT |
103 | struct inet_protosw *answer; |
104 | struct proto *answer_prot; | |
105 | unsigned char answer_flags; | |
106 | char answer_no_check; | |
af1afe86 YH |
107 | int try_loading_module = 0; |
108 | int err; | |
1da177e4 | 109 | |
b3da2cf3 DM |
110 | if (sock->type != SOCK_RAW && |
111 | sock->type != SOCK_DGRAM && | |
112 | !inet_ehash_secret) | |
113 | build_ehash_secret(); | |
114 | ||
1da177e4 | 115 | /* Look for the requested type/protocol pair. */ |
af1afe86 YH |
116 | lookup_protocol: |
117 | err = -ESOCKTNOSUPPORT; | |
1da177e4 | 118 | rcu_read_lock(); |
696adfe8 | 119 | list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { |
1da177e4 | 120 | |
696adfe8 | 121 | err = 0; |
1da177e4 LT |
122 | /* Check the non-wild match. */ |
123 | if (protocol == answer->protocol) { | |
124 | if (protocol != IPPROTO_IP) | |
125 | break; | |
126 | } else { | |
127 | /* Check for the two wild cases. */ | |
128 | if (IPPROTO_IP == protocol) { | |
129 | protocol = answer->protocol; | |
130 | break; | |
131 | } | |
132 | if (IPPROTO_IP == answer->protocol) | |
133 | break; | |
134 | } | |
af1afe86 | 135 | err = -EPROTONOSUPPORT; |
1da177e4 LT |
136 | } |
137 | ||
696adfe8 | 138 | if (err) { |
af1afe86 YH |
139 | if (try_loading_module < 2) { |
140 | rcu_read_unlock(); | |
141 | /* | |
142 | * Be more specific, e.g. net-pf-10-proto-132-type-1 | |
143 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) | |
144 | */ | |
145 | if (++try_loading_module == 1) | |
146 | request_module("net-pf-%d-proto-%d-type-%d", | |
147 | PF_INET6, protocol, sock->type); | |
148 | /* | |
149 | * Fall back to generic, e.g. net-pf-10-proto-132 | |
150 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP) | |
151 | */ | |
152 | else | |
153 | request_module("net-pf-%d-proto-%d", | |
154 | PF_INET6, protocol); | |
155 | goto lookup_protocol; | |
156 | } else | |
157 | goto out_rcu_unlock; | |
158 | } | |
159 | ||
160 | err = -EPERM; | |
1da177e4 LT |
161 | if (answer->capability > 0 && !capable(answer->capability)) |
162 | goto out_rcu_unlock; | |
1da177e4 LT |
163 | |
164 | sock->ops = answer->ops; | |
1da177e4 LT |
165 | answer_prot = answer->prot; |
166 | answer_no_check = answer->no_check; | |
167 | answer_flags = answer->flags; | |
168 | rcu_read_unlock(); | |
169 | ||
547b792c | 170 | WARN_ON(answer_prot->slab == NULL); |
1da177e4 | 171 | |
af1afe86 | 172 | err = -ENOBUFS; |
6257ff21 | 173 | sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot); |
1da177e4 LT |
174 | if (sk == NULL) |
175 | goto out; | |
176 | ||
177 | sock_init_data(sock, sk); | |
178 | ||
af1afe86 | 179 | err = 0; |
1da177e4 LT |
180 | sk->sk_no_check = answer_no_check; |
181 | if (INET_PROTOSW_REUSE & answer_flags) | |
182 | sk->sk_reuse = 1; | |
183 | ||
184 | inet = inet_sk(sk); | |
469de9b9 | 185 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
1da177e4 LT |
186 | |
187 | if (SOCK_RAW == sock->type) { | |
188 | inet->num = protocol; | |
189 | if (IPPROTO_RAW == protocol) | |
190 | inet->hdrincl = 1; | |
191 | } | |
192 | ||
e6848976 | 193 | sk->sk_destruct = inet_sock_destruct; |
1da177e4 LT |
194 | sk->sk_family = PF_INET6; |
195 | sk->sk_protocol = protocol; | |
196 | ||
197 | sk->sk_backlog_rcv = answer->prot->backlog_rcv; | |
198 | ||
199 | inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); | |
200 | np->hop_limit = -1; | |
201 | np->mcast_hops = -1; | |
202 | np->mc_loop = 1; | |
203 | np->pmtudisc = IPV6_PMTUDISC_WANT; | |
2e761e05 | 204 | np->ipv6only = net->ipv6.sysctl.bindv6only; |
1ab1457c | 205 | |
1da177e4 LT |
206 | /* Init the ipv4 part of the socket since we can have sockets |
207 | * using v6 API for ipv4. | |
208 | */ | |
209 | inet->uc_ttl = -1; | |
210 | ||
211 | inet->mc_loop = 1; | |
212 | inet->mc_ttl = 1; | |
213 | inet->mc_index = 0; | |
214 | inet->mc_list = NULL; | |
215 | ||
216 | if (ipv4_config.no_pmtu_disc) | |
217 | inet->pmtudisc = IP_PMTUDISC_DONT; | |
218 | else | |
219 | inet->pmtudisc = IP_PMTUDISC_WANT; | |
1ab1457c | 220 | /* |
e6848976 ACM |
221 | * Increment only the relevant sk_prot->socks debug field, this changes |
222 | * the previous behaviour of incrementing both the equivalent to | |
223 | * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. | |
224 | * | |
225 | * This allows better debug granularity as we'll know exactly how many | |
226 | * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 | |
227 | * transport protocol socks. -acme | |
228 | */ | |
229 | sk_refcnt_debug_inc(sk); | |
1da177e4 | 230 | |
1da177e4 LT |
231 | if (inet->num) { |
232 | /* It assumes that any protocol which allows | |
233 | * the user to assign a number at socket | |
234 | * creation time automatically shares. | |
235 | */ | |
e69a4adc | 236 | inet->sport = htons(inet->num); |
1da177e4 LT |
237 | sk->sk_prot->hash(sk); |
238 | } | |
239 | if (sk->sk_prot->init) { | |
af1afe86 YH |
240 | err = sk->sk_prot->init(sk); |
241 | if (err) { | |
1da177e4 LT |
242 | sk_common_release(sk); |
243 | goto out; | |
244 | } | |
245 | } | |
246 | out: | |
af1afe86 | 247 | return err; |
1da177e4 LT |
248 | out_rcu_unlock: |
249 | rcu_read_unlock(); | |
250 | goto out; | |
251 | } | |
252 | ||
253 | ||
254 | /* bind for INET6 API */ | |
255 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
256 | { | |
257 | struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr; | |
258 | struct sock *sk = sock->sk; | |
259 | struct inet_sock *inet = inet_sk(sk); | |
260 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 261 | struct net *net = sock_net(sk); |
fd683222 | 262 | __be32 v4addr = 0; |
1da177e4 LT |
263 | unsigned short snum; |
264 | int addr_type = 0; | |
265 | int err = 0; | |
266 | ||
267 | /* If the socket has its own bind function then use it. */ | |
268 | if (sk->sk_prot->bind) | |
269 | return sk->sk_prot->bind(sk, uaddr, addr_len); | |
270 | ||
271 | if (addr_len < SIN6_LEN_RFC2133) | |
272 | return -EINVAL; | |
273 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
274 | if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) | |
275 | return -EINVAL; | |
276 | ||
277 | snum = ntohs(addr->sin6_port); | |
278 | if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
279 | return -EACCES; | |
280 | ||
281 | lock_sock(sk); | |
282 | ||
283 | /* Check these errors (active socket, double bind). */ | |
284 | if (sk->sk_state != TCP_CLOSE || inet->num) { | |
285 | err = -EINVAL; | |
286 | goto out; | |
287 | } | |
288 | ||
289 | /* Check if the address belongs to the host. */ | |
290 | if (addr_type == IPV6_ADDR_MAPPED) { | |
63d9950b VY |
291 | int chk_addr_ret; |
292 | ||
783ed5a7 VY |
293 | /* Binding to v4-mapped address on a v6-only socket |
294 | * makes no sense | |
295 | */ | |
296 | if (np->ipv6only) { | |
297 | err = -EINVAL; | |
298 | goto out; | |
299 | } | |
63d9950b VY |
300 | |
301 | /* Reproduce AF_INET checks to make the bindings consitant */ | |
1da177e4 | 302 | v4addr = addr->sin6_addr.s6_addr32[3]; |
63d9950b VY |
303 | chk_addr_ret = inet_addr_type(net, v4addr); |
304 | if (!sysctl_ip_nonlocal_bind && | |
305 | !(inet->freebind || inet->transparent) && | |
306 | v4addr != htonl(INADDR_ANY) && | |
307 | chk_addr_ret != RTN_LOCAL && | |
308 | chk_addr_ret != RTN_MULTICAST && | |
ca6982b8 BP |
309 | chk_addr_ret != RTN_BROADCAST) { |
310 | err = -EADDRNOTAVAIL; | |
1da177e4 | 311 | goto out; |
ca6982b8 | 312 | } |
1da177e4 LT |
313 | } else { |
314 | if (addr_type != IPV6_ADDR_ANY) { | |
315 | struct net_device *dev = NULL; | |
316 | ||
317 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
318 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
319 | addr->sin6_scope_id) { | |
320 | /* Override any existing binding, if another one | |
321 | * is supplied by user. | |
322 | */ | |
323 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
324 | } | |
1ab1457c | 325 | |
1da177e4 LT |
326 | /* Binding to link-local address requires an interface */ |
327 | if (!sk->sk_bound_dev_if) { | |
328 | err = -EINVAL; | |
329 | goto out; | |
330 | } | |
075de939 | 331 | dev = dev_get_by_index(net, sk->sk_bound_dev_if); |
1da177e4 LT |
332 | if (!dev) { |
333 | err = -ENODEV; | |
334 | goto out; | |
335 | } | |
336 | } | |
337 | ||
338 | /* ipv4 addr of the socket is invalid. Only the | |
339 | * unspecified and mapped address have a v4 equivalent. | |
340 | */ | |
341 | v4addr = LOOPBACK4_IPV6; | |
342 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
075de939 | 343 | if (!ipv6_chk_addr(net, &addr->sin6_addr, |
bfeade08 | 344 | dev, 0)) { |
1da177e4 LT |
345 | if (dev) |
346 | dev_put(dev); | |
347 | err = -EADDRNOTAVAIL; | |
348 | goto out; | |
349 | } | |
350 | } | |
351 | if (dev) | |
352 | dev_put(dev); | |
353 | } | |
354 | } | |
355 | ||
356 | inet->rcv_saddr = v4addr; | |
357 | inet->saddr = v4addr; | |
358 | ||
359 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
1ab1457c | 360 | |
1da177e4 LT |
361 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
362 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
363 | ||
364 | /* Make sure we are allowed to bind here. */ | |
365 | if (sk->sk_prot->get_port(sk, snum)) { | |
366 | inet_reset_saddr(sk); | |
367 | err = -EADDRINUSE; | |
368 | goto out; | |
369 | } | |
370 | ||
0f8d3c7a | 371 | if (addr_type != IPV6_ADDR_ANY) { |
1da177e4 | 372 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
0f8d3c7a VY |
373 | if (addr_type != IPV6_ADDR_MAPPED) |
374 | np->ipv6only = 1; | |
375 | } | |
1da177e4 LT |
376 | if (snum) |
377 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
e69a4adc | 378 | inet->sport = htons(inet->num); |
1da177e4 LT |
379 | inet->dport = 0; |
380 | inet->daddr = 0; | |
381 | out: | |
382 | release_sock(sk); | |
383 | return err; | |
384 | } | |
385 | ||
7159039a YH |
386 | EXPORT_SYMBOL(inet6_bind); |
387 | ||
1da177e4 LT |
388 | int inet6_release(struct socket *sock) |
389 | { | |
390 | struct sock *sk = sock->sk; | |
391 | ||
392 | if (sk == NULL) | |
393 | return -EINVAL; | |
394 | ||
395 | /* Free mc lists */ | |
396 | ipv6_sock_mc_close(sk); | |
397 | ||
398 | /* Free ac lists */ | |
399 | ipv6_sock_ac_close(sk); | |
400 | ||
401 | return inet_release(sock); | |
402 | } | |
403 | ||
7159039a YH |
404 | EXPORT_SYMBOL(inet6_release); |
405 | ||
7d06b2e0 | 406 | void inet6_destroy_sock(struct sock *sk) |
1da177e4 LT |
407 | { |
408 | struct ipv6_pinfo *np = inet6_sk(sk); | |
409 | struct sk_buff *skb; | |
410 | struct ipv6_txoptions *opt; | |
411 | ||
1da177e4 LT |
412 | /* Release rx options */ |
413 | ||
414 | if ((skb = xchg(&np->pktoptions, NULL)) != NULL) | |
415 | kfree_skb(skb); | |
416 | ||
417 | /* Free flowlabels */ | |
418 | fl6_free_socklist(sk); | |
419 | ||
420 | /* Free tx options */ | |
421 | ||
422 | if ((opt = xchg(&np->opt, NULL)) != NULL) | |
423 | sock_kfree_s(sk, opt, opt->tot_len); | |
1da177e4 LT |
424 | } |
425 | ||
3cf3dc6c ACM |
426 | EXPORT_SYMBOL_GPL(inet6_destroy_sock); |
427 | ||
1da177e4 LT |
428 | /* |
429 | * This does both peername and sockname. | |
430 | */ | |
1ab1457c | 431 | |
1da177e4 LT |
432 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
433 | int *uaddr_len, int peer) | |
434 | { | |
435 | struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr; | |
436 | struct sock *sk = sock->sk; | |
437 | struct inet_sock *inet = inet_sk(sk); | |
438 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1ab1457c | 439 | |
1da177e4 LT |
440 | sin->sin6_family = AF_INET6; |
441 | sin->sin6_flowinfo = 0; | |
442 | sin->sin6_scope_id = 0; | |
443 | if (peer) { | |
444 | if (!inet->dport) | |
445 | return -ENOTCONN; | |
446 | if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && | |
447 | peer == 1) | |
448 | return -ENOTCONN; | |
449 | sin->sin6_port = inet->dport; | |
450 | ipv6_addr_copy(&sin->sin6_addr, &np->daddr); | |
451 | if (np->sndflow) | |
452 | sin->sin6_flowinfo = np->flow_label; | |
453 | } else { | |
454 | if (ipv6_addr_any(&np->rcv_saddr)) | |
455 | ipv6_addr_copy(&sin->sin6_addr, &np->saddr); | |
456 | else | |
457 | ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr); | |
458 | ||
459 | sin->sin6_port = inet->sport; | |
460 | } | |
461 | if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
462 | sin->sin6_scope_id = sk->sk_bound_dev_if; | |
463 | *uaddr_len = sizeof(*sin); | |
464 | return(0); | |
465 | } | |
466 | ||
7159039a YH |
467 | EXPORT_SYMBOL(inet6_getname); |
468 | ||
1da177e4 LT |
469 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
470 | { | |
471 | struct sock *sk = sock->sk; | |
3b1e0a65 | 472 | struct net *net = sock_net(sk); |
1da177e4 | 473 | |
1ab1457c | 474 | switch(cmd) |
1da177e4 LT |
475 | { |
476 | case SIOCGSTAMP: | |
477 | return sock_get_timestamp(sk, (struct timeval __user *)arg); | |
478 | ||
ae40eb1e ED |
479 | case SIOCGSTAMPNS: |
480 | return sock_get_timestampns(sk, (struct timespec __user *)arg); | |
481 | ||
1da177e4 LT |
482 | case SIOCADDRT: |
483 | case SIOCDELRT: | |
1ab1457c | 484 | |
5578689a | 485 | return(ipv6_route_ioctl(net, cmd, (void __user *)arg)); |
1da177e4 LT |
486 | |
487 | case SIOCSIFADDR: | |
af284937 | 488 | return addrconf_add_ifaddr(net, (void __user *) arg); |
1da177e4 | 489 | case SIOCDIFADDR: |
af284937 | 490 | return addrconf_del_ifaddr(net, (void __user *) arg); |
1da177e4 | 491 | case SIOCSIFDSTADDR: |
af284937 | 492 | return addrconf_set_dstaddr(net, (void __user *) arg); |
1da177e4 | 493 | default: |
b5e5fa5e CH |
494 | if (!sk->sk_prot->ioctl) |
495 | return -ENOIOCTLCMD; | |
496 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
1da177e4 LT |
497 | } |
498 | /*NOTREACHED*/ | |
499 | return(0); | |
500 | } | |
501 | ||
7159039a YH |
502 | EXPORT_SYMBOL(inet6_ioctl); |
503 | ||
90ddc4f0 | 504 | const struct proto_ops inet6_stream_ops = { |
543d9cfe ACM |
505 | .family = PF_INET6, |
506 | .owner = THIS_MODULE, | |
507 | .release = inet6_release, | |
508 | .bind = inet6_bind, | |
509 | .connect = inet_stream_connect, /* ok */ | |
510 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
511 | .accept = inet_accept, /* ok */ | |
512 | .getname = inet6_getname, | |
513 | .poll = tcp_poll, /* ok */ | |
514 | .ioctl = inet6_ioctl, /* must change */ | |
515 | .listen = inet_listen, /* ok */ | |
516 | .shutdown = inet_shutdown, /* ok */ | |
517 | .setsockopt = sock_common_setsockopt, /* ok */ | |
518 | .getsockopt = sock_common_getsockopt, /* ok */ | |
3516ffb0 | 519 | .sendmsg = tcp_sendmsg, /* ok */ |
543d9cfe ACM |
520 | .recvmsg = sock_common_recvmsg, /* ok */ |
521 | .mmap = sock_no_mmap, | |
522 | .sendpage = tcp_sendpage, | |
a0974dd3 | 523 | .splice_read = tcp_splice_read, |
3fdadf7d | 524 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
525 | .compat_setsockopt = compat_sock_common_setsockopt, |
526 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 527 | #endif |
1da177e4 LT |
528 | }; |
529 | ||
90ddc4f0 | 530 | const struct proto_ops inet6_dgram_ops = { |
543d9cfe ACM |
531 | .family = PF_INET6, |
532 | .owner = THIS_MODULE, | |
533 | .release = inet6_release, | |
534 | .bind = inet6_bind, | |
535 | .connect = inet_dgram_connect, /* ok */ | |
536 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
537 | .accept = sock_no_accept, /* a do nothing */ | |
538 | .getname = inet6_getname, | |
539 | .poll = udp_poll, /* ok */ | |
540 | .ioctl = inet6_ioctl, /* must change */ | |
541 | .listen = sock_no_listen, /* ok */ | |
542 | .shutdown = inet_shutdown, /* ok */ | |
543 | .setsockopt = sock_common_setsockopt, /* ok */ | |
544 | .getsockopt = sock_common_getsockopt, /* ok */ | |
545 | .sendmsg = inet_sendmsg, /* ok */ | |
546 | .recvmsg = sock_common_recvmsg, /* ok */ | |
547 | .mmap = sock_no_mmap, | |
548 | .sendpage = sock_no_sendpage, | |
3fdadf7d | 549 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
550 | .compat_setsockopt = compat_sock_common_setsockopt, |
551 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 552 | #endif |
1da177e4 LT |
553 | }; |
554 | ||
555 | static struct net_proto_family inet6_family_ops = { | |
556 | .family = PF_INET6, | |
557 | .create = inet6_create, | |
558 | .owner = THIS_MODULE, | |
559 | }; | |
560 | ||
87c3efbf | 561 | int inet6_register_protosw(struct inet_protosw *p) |
1da177e4 LT |
562 | { |
563 | struct list_head *lh; | |
564 | struct inet_protosw *answer; | |
1da177e4 | 565 | struct list_head *last_perm; |
87c3efbf DL |
566 | int protocol = p->protocol; |
567 | int ret; | |
1da177e4 LT |
568 | |
569 | spin_lock_bh(&inetsw6_lock); | |
570 | ||
87c3efbf | 571 | ret = -EINVAL; |
1da177e4 LT |
572 | if (p->type >= SOCK_MAX) |
573 | goto out_illegal; | |
574 | ||
575 | /* If we are trying to override a permanent protocol, bail. */ | |
576 | answer = NULL; | |
87c3efbf | 577 | ret = -EPERM; |
1da177e4 LT |
578 | last_perm = &inetsw6[p->type]; |
579 | list_for_each(lh, &inetsw6[p->type]) { | |
580 | answer = list_entry(lh, struct inet_protosw, list); | |
581 | ||
582 | /* Check only the non-wild match. */ | |
583 | if (INET_PROTOSW_PERMANENT & answer->flags) { | |
584 | if (protocol == answer->protocol) | |
585 | break; | |
586 | last_perm = lh; | |
587 | } | |
588 | ||
589 | answer = NULL; | |
590 | } | |
591 | if (answer) | |
592 | goto out_permanent; | |
593 | ||
594 | /* Add the new entry after the last permanent entry if any, so that | |
595 | * the new entry does not override a permanent entry when matched with | |
596 | * a wild-card protocol. But it is allowed to override any existing | |
1ab1457c | 597 | * non-permanent entry. This means that when we remove this entry, the |
1da177e4 LT |
598 | * system automatically returns to the old behavior. |
599 | */ | |
600 | list_add_rcu(&p->list, last_perm); | |
87c3efbf | 601 | ret = 0; |
1da177e4 LT |
602 | out: |
603 | spin_unlock_bh(&inetsw6_lock); | |
87c3efbf | 604 | return ret; |
1da177e4 LT |
605 | |
606 | out_permanent: | |
607 | printk(KERN_ERR "Attempt to override permanent protocol %d.\n", | |
608 | protocol); | |
609 | goto out; | |
610 | ||
611 | out_illegal: | |
612 | printk(KERN_ERR | |
613 | "Ignoring attempt to register invalid socket type %d.\n", | |
614 | p->type); | |
615 | goto out; | |
616 | } | |
617 | ||
7159039a YH |
618 | EXPORT_SYMBOL(inet6_register_protosw); |
619 | ||
1da177e4 LT |
620 | void |
621 | inet6_unregister_protosw(struct inet_protosw *p) | |
622 | { | |
623 | if (INET_PROTOSW_PERMANENT & p->flags) { | |
624 | printk(KERN_ERR | |
625 | "Attempt to unregister permanent protocol %d.\n", | |
626 | p->protocol); | |
627 | } else { | |
628 | spin_lock_bh(&inetsw6_lock); | |
629 | list_del_rcu(&p->list); | |
630 | spin_unlock_bh(&inetsw6_lock); | |
631 | ||
632 | synchronize_net(); | |
633 | } | |
634 | } | |
635 | ||
7159039a YH |
636 | EXPORT_SYMBOL(inet6_unregister_protosw); |
637 | ||
b9750ce1 ACM |
638 | int inet6_sk_rebuild_header(struct sock *sk) |
639 | { | |
640 | int err; | |
641 | struct dst_entry *dst; | |
642 | struct ipv6_pinfo *np = inet6_sk(sk); | |
643 | ||
644 | dst = __sk_dst_check(sk, np->dst_cookie); | |
645 | ||
646 | if (dst == NULL) { | |
647 | struct inet_sock *inet = inet_sk(sk); | |
648 | struct in6_addr *final_p = NULL, final; | |
649 | struct flowi fl; | |
650 | ||
651 | memset(&fl, 0, sizeof(fl)); | |
652 | fl.proto = sk->sk_protocol; | |
653 | ipv6_addr_copy(&fl.fl6_dst, &np->daddr); | |
654 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
655 | fl.fl6_flowlabel = np->flow_label; | |
656 | fl.oif = sk->sk_bound_dev_if; | |
657 | fl.fl_ip_dport = inet->dport; | |
658 | fl.fl_ip_sport = inet->sport; | |
beb8d13b | 659 | security_sk_classify_flow(sk, &fl); |
b9750ce1 ACM |
660 | |
661 | if (np->opt && np->opt->srcrt) { | |
662 | struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; | |
663 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
664 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
665 | final_p = &final; | |
666 | } | |
667 | ||
668 | err = ip6_dst_lookup(sk, &dst, &fl); | |
669 | if (err) { | |
670 | sk->sk_route_caps = 0; | |
671 | return err; | |
672 | } | |
673 | if (final_p) | |
674 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
675 | ||
52479b62 | 676 | if ((err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0) { |
b9750ce1 ACM |
677 | sk->sk_err_soft = -err; |
678 | return err; | |
679 | } | |
680 | ||
8e1ef0a9 | 681 | __ip6_dst_store(sk, dst, NULL, NULL); |
b9750ce1 ACM |
682 | } |
683 | ||
684 | return 0; | |
685 | } | |
686 | ||
687 | EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); | |
688 | ||
399c07de ACM |
689 | int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb) |
690 | { | |
691 | struct ipv6_pinfo *np = inet6_sk(sk); | |
692 | struct inet6_skb_parm *opt = IP6CB(skb); | |
693 | ||
694 | if (np->rxopt.all) { | |
695 | if ((opt->hop && (np->rxopt.bits.hopopts || | |
696 | np->rxopt.bits.ohopopts)) || | |
d56f90a7 ACM |
697 | ((IPV6_FLOWINFO_MASK & |
698 | *(__be32 *)skb_network_header(skb)) && | |
399c07de ACM |
699 | np->rxopt.bits.rxflow) || |
700 | (opt->srcrt && (np->rxopt.bits.srcrt || | |
701 | np->rxopt.bits.osrcrt)) || | |
702 | ((opt->dst1 || opt->dst0) && | |
703 | (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) | |
704 | return 1; | |
705 | } | |
706 | return 0; | |
707 | } | |
708 | ||
709 | EXPORT_SYMBOL_GPL(ipv6_opt_accepted); | |
710 | ||
787e9208 | 711 | static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto) |
662397fd | 712 | { |
41135cc8 | 713 | const struct inet6_protocol *ops = NULL; |
662397fd YH |
714 | |
715 | for (;;) { | |
716 | struct ipv6_opt_hdr *opth; | |
717 | int len; | |
718 | ||
719 | if (proto != NEXTHDR_HOP) { | |
720 | ops = rcu_dereference(inet6_protos[proto]); | |
721 | ||
722 | if (unlikely(!ops)) | |
723 | break; | |
724 | ||
725 | if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) | |
726 | break; | |
727 | } | |
728 | ||
729 | if (unlikely(!pskb_may_pull(skb, 8))) | |
730 | break; | |
731 | ||
732 | opth = (void *)skb->data; | |
733 | len = ipv6_optlen(opth); | |
734 | ||
735 | if (unlikely(!pskb_may_pull(skb, len))) | |
736 | break; | |
737 | ||
738 | proto = opth->nexthdr; | |
739 | __skb_pull(skb, len); | |
740 | } | |
741 | ||
787e9208 | 742 | return proto; |
662397fd YH |
743 | } |
744 | ||
745 | static int ipv6_gso_send_check(struct sk_buff *skb) | |
746 | { | |
747 | struct ipv6hdr *ipv6h; | |
41135cc8 | 748 | const struct inet6_protocol *ops; |
662397fd YH |
749 | int err = -EINVAL; |
750 | ||
751 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
752 | goto out; | |
753 | ||
754 | ipv6h = ipv6_hdr(skb); | |
755 | __skb_pull(skb, sizeof(*ipv6h)); | |
756 | err = -EPROTONOSUPPORT; | |
757 | ||
758 | rcu_read_lock(); | |
787e9208 HX |
759 | ops = rcu_dereference(inet6_protos[ |
760 | ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); | |
761 | ||
662397fd YH |
762 | if (likely(ops && ops->gso_send_check)) { |
763 | skb_reset_transport_header(skb); | |
764 | err = ops->gso_send_check(skb); | |
765 | } | |
766 | rcu_read_unlock(); | |
767 | ||
768 | out: | |
769 | return err; | |
770 | } | |
771 | ||
772 | static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features) | |
773 | { | |
774 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
775 | struct ipv6hdr *ipv6h; | |
41135cc8 | 776 | const struct inet6_protocol *ops; |
ba735425 SS |
777 | int proto; |
778 | struct frag_hdr *fptr; | |
779 | unsigned int unfrag_ip6hlen; | |
780 | u8 *prevhdr; | |
781 | int offset = 0; | |
662397fd YH |
782 | |
783 | if (!(features & NETIF_F_V6_CSUM)) | |
784 | features &= ~NETIF_F_SG; | |
785 | ||
786 | if (unlikely(skb_shinfo(skb)->gso_type & | |
787 | ~(SKB_GSO_UDP | | |
788 | SKB_GSO_DODGY | | |
789 | SKB_GSO_TCP_ECN | | |
790 | SKB_GSO_TCPV6 | | |
791 | 0))) | |
792 | goto out; | |
793 | ||
794 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
795 | goto out; | |
796 | ||
797 | ipv6h = ipv6_hdr(skb); | |
798 | __skb_pull(skb, sizeof(*ipv6h)); | |
799 | segs = ERR_PTR(-EPROTONOSUPPORT); | |
800 | ||
ba735425 | 801 | proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); |
662397fd | 802 | rcu_read_lock(); |
ba735425 | 803 | ops = rcu_dereference(inet6_protos[proto]); |
662397fd YH |
804 | if (likely(ops && ops->gso_segment)) { |
805 | skb_reset_transport_header(skb); | |
806 | segs = ops->gso_segment(skb, features); | |
807 | } | |
808 | rcu_read_unlock(); | |
809 | ||
810 | if (unlikely(IS_ERR(segs))) | |
811 | goto out; | |
812 | ||
813 | for (skb = segs; skb; skb = skb->next) { | |
814 | ipv6h = ipv6_hdr(skb); | |
815 | ipv6h->payload_len = htons(skb->len - skb->mac_len - | |
816 | sizeof(*ipv6h)); | |
ba735425 SS |
817 | if (proto == IPPROTO_UDP) { |
818 | unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); | |
819 | fptr = (struct frag_hdr *)(skb_network_header(skb) + | |
820 | unfrag_ip6hlen); | |
821 | fptr->frag_off = htons(offset); | |
822 | if (skb->next != NULL) | |
823 | fptr->frag_off |= htons(IP6_MF); | |
824 | offset += (ntohs(ipv6h->payload_len) - | |
825 | sizeof(struct frag_hdr)); | |
826 | } | |
662397fd YH |
827 | } |
828 | ||
829 | out: | |
830 | return segs; | |
831 | } | |
832 | ||
787e9208 HX |
833 | struct ipv6_gro_cb { |
834 | struct napi_gro_cb napi; | |
835 | int proto; | |
836 | }; | |
837 | ||
838 | #define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb) | |
839 | ||
840 | static struct sk_buff **ipv6_gro_receive(struct sk_buff **head, | |
841 | struct sk_buff *skb) | |
842 | { | |
41135cc8 | 843 | const struct inet6_protocol *ops; |
787e9208 HX |
844 | struct sk_buff **pp = NULL; |
845 | struct sk_buff *p; | |
846 | struct ipv6hdr *iph; | |
847 | unsigned int nlen; | |
a5b1cf28 HX |
848 | unsigned int hlen; |
849 | unsigned int off; | |
787e9208 HX |
850 | int flush = 1; |
851 | int proto; | |
ebad18e9 | 852 | __wsum csum; |
787e9208 | 853 | |
a5b1cf28 HX |
854 | off = skb_gro_offset(skb); |
855 | hlen = off + sizeof(*iph); | |
856 | iph = skb_gro_header_fast(skb, off); | |
857 | if (skb_gro_header_hard(skb, hlen)) { | |
858 | iph = skb_gro_header_slow(skb, hlen, off); | |
859 | if (unlikely(!iph)) | |
860 | goto out; | |
861 | } | |
787e9208 | 862 | |
86911732 HX |
863 | skb_gro_pull(skb, sizeof(*iph)); |
864 | skb_set_transport_header(skb, skb_gro_offset(skb)); | |
787e9208 | 865 | |
86911732 | 866 | flush += ntohs(iph->payload_len) != skb_gro_len(skb); |
787e9208 HX |
867 | |
868 | rcu_read_lock(); | |
86911732 | 869 | proto = iph->nexthdr; |
787e9208 | 870 | ops = rcu_dereference(inet6_protos[proto]); |
86911732 HX |
871 | if (!ops || !ops->gro_receive) { |
872 | __pskb_pull(skb, skb_gro_offset(skb)); | |
873 | proto = ipv6_gso_pull_exthdrs(skb, proto); | |
874 | skb_gro_pull(skb, -skb_transport_offset(skb)); | |
875 | skb_reset_transport_header(skb); | |
876 | __skb_push(skb, skb_gro_offset(skb)); | |
877 | ||
878 | if (!ops || !ops->gro_receive) | |
879 | goto out_unlock; | |
880 | ||
881 | iph = ipv6_hdr(skb); | |
882 | } | |
883 | ||
884 | IPV6_GRO_CB(skb)->proto = proto; | |
787e9208 HX |
885 | |
886 | flush--; | |
787e9208 HX |
887 | nlen = skb_network_header_len(skb); |
888 | ||
889 | for (p = *head; p; p = p->next) { | |
890 | struct ipv6hdr *iph2; | |
891 | ||
892 | if (!NAPI_GRO_CB(p)->same_flow) | |
893 | continue; | |
894 | ||
895 | iph2 = ipv6_hdr(p); | |
896 | ||
897 | /* All fields must match except length. */ | |
898 | if (nlen != skb_network_header_len(p) || | |
899 | memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) || | |
900 | memcmp(&iph->nexthdr, &iph2->nexthdr, | |
901 | nlen - offsetof(struct ipv6hdr, nexthdr))) { | |
902 | NAPI_GRO_CB(p)->same_flow = 0; | |
903 | continue; | |
904 | } | |
905 | ||
906 | NAPI_GRO_CB(p)->flush |= flush; | |
907 | } | |
908 | ||
909 | NAPI_GRO_CB(skb)->flush |= flush; | |
910 | ||
ebad18e9 HX |
911 | csum = skb->csum; |
912 | skb_postpull_rcsum(skb, iph, skb_network_header_len(skb)); | |
913 | ||
787e9208 HX |
914 | pp = ops->gro_receive(head, skb); |
915 | ||
ebad18e9 HX |
916 | skb->csum = csum; |
917 | ||
787e9208 HX |
918 | out_unlock: |
919 | rcu_read_unlock(); | |
920 | ||
921 | out: | |
922 | NAPI_GRO_CB(skb)->flush |= flush; | |
923 | ||
924 | return pp; | |
925 | } | |
926 | ||
927 | static int ipv6_gro_complete(struct sk_buff *skb) | |
928 | { | |
41135cc8 | 929 | const struct inet6_protocol *ops; |
787e9208 HX |
930 | struct ipv6hdr *iph = ipv6_hdr(skb); |
931 | int err = -ENOSYS; | |
932 | ||
933 | iph->payload_len = htons(skb->len - skb_network_offset(skb) - | |
934 | sizeof(*iph)); | |
935 | ||
936 | rcu_read_lock(); | |
937 | ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]); | |
938 | if (WARN_ON(!ops || !ops->gro_complete)) | |
939 | goto out_unlock; | |
940 | ||
941 | err = ops->gro_complete(skb); | |
942 | ||
943 | out_unlock: | |
944 | rcu_read_unlock(); | |
945 | ||
946 | return err; | |
947 | } | |
948 | ||
7546dd97 | 949 | static struct packet_type ipv6_packet_type __read_mostly = { |
09640e63 | 950 | .type = cpu_to_be16(ETH_P_IPV6), |
662397fd YH |
951 | .func = ipv6_rcv, |
952 | .gso_send_check = ipv6_gso_send_check, | |
953 | .gso_segment = ipv6_gso_segment, | |
787e9208 HX |
954 | .gro_receive = ipv6_gro_receive, |
955 | .gro_complete = ipv6_gro_complete, | |
662397fd YH |
956 | }; |
957 | ||
958 | static int __init ipv6_packet_init(void) | |
959 | { | |
960 | dev_add_pack(&ipv6_packet_type); | |
961 | return 0; | |
962 | } | |
963 | ||
964 | static void ipv6_packet_cleanup(void) | |
965 | { | |
966 | dev_remove_pack(&ipv6_packet_type); | |
967 | } | |
968 | ||
e43291cb DL |
969 | static int __net_init ipv6_init_mibs(struct net *net) |
970 | { | |
0c7ed677 DL |
971 | if (snmp_mib_init((void **)net->mib.udp_stats_in6, |
972 | sizeof (struct udp_mib)) < 0) | |
973 | return -ENOMEM; | |
be713a44 DL |
974 | if (snmp_mib_init((void **)net->mib.udplite_stats_in6, |
975 | sizeof (struct udp_mib)) < 0) | |
976 | goto err_udplite_mib; | |
9261e537 DL |
977 | if (snmp_mib_init((void **)net->mib.ipv6_statistics, |
978 | sizeof(struct ipstats_mib)) < 0) | |
979 | goto err_ip_mib; | |
980 | if (snmp_mib_init((void **)net->mib.icmpv6_statistics, | |
981 | sizeof(struct icmpv6_mib)) < 0) | |
982 | goto err_icmp_mib; | |
983 | if (snmp_mib_init((void **)net->mib.icmpv6msg_statistics, | |
984 | sizeof(struct icmpv6msg_mib)) < 0) | |
985 | goto err_icmpmsg_mib; | |
e43291cb | 986 | return 0; |
be713a44 | 987 | |
9261e537 DL |
988 | err_icmpmsg_mib: |
989 | snmp_mib_free((void **)net->mib.icmpv6_statistics); | |
990 | err_icmp_mib: | |
991 | snmp_mib_free((void **)net->mib.ipv6_statistics); | |
992 | err_ip_mib: | |
993 | snmp_mib_free((void **)net->mib.udplite_stats_in6); | |
be713a44 DL |
994 | err_udplite_mib: |
995 | snmp_mib_free((void **)net->mib.udp_stats_in6); | |
996 | return -ENOMEM; | |
e43291cb DL |
997 | } |
998 | ||
999 | static void __net_exit ipv6_cleanup_mibs(struct net *net) | |
1000 | { | |
0c7ed677 | 1001 | snmp_mib_free((void **)net->mib.udp_stats_in6); |
be713a44 | 1002 | snmp_mib_free((void **)net->mib.udplite_stats_in6); |
9261e537 DL |
1003 | snmp_mib_free((void **)net->mib.ipv6_statistics); |
1004 | snmp_mib_free((void **)net->mib.icmpv6_statistics); | |
1005 | snmp_mib_free((void **)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 | ||
1042 | static void inet6_net_exit(struct net *net) | |
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 BH |
1065 | /* Register the socket-side information for inet6_create. */ |
1066 | for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) | |
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 | |
eeb61f71 AV |
1107 | #ifdef CONFIG_SYSCTL |
1108 | err = ipv6_static_sysctl_register(); | |
1109 | if (err) | |
1110 | goto static_sysctl_fail; | |
1111 | #endif | |
1da177e4 LT |
1112 | /* |
1113 | * ipngwg API draft makes clear that the correct semantics | |
1114 | * for TCP and UDP is to consider one TCP and UDP instance | |
1115 | * in a host availiable by both INET and INET6 APIs and | |
1116 | * able to communicate via both network protocols. | |
1117 | */ | |
1118 | ||
81c1c178 DL |
1119 | err = register_pernet_subsys(&inet6_net_ops); |
1120 | if (err) | |
1121 | goto register_pernet_fail; | |
9b0f976f | 1122 | err = icmpv6_init(); |
1da177e4 LT |
1123 | if (err) |
1124 | goto icmp_fail; | |
623d1a1a WC |
1125 | err = ip6_mr_init(); |
1126 | if (err) | |
1127 | goto ipmr_fail; | |
9b0f976f | 1128 | err = ndisc_init(); |
1da177e4 LT |
1129 | if (err) |
1130 | goto ndisc_fail; | |
9b0f976f | 1131 | err = igmp6_init(); |
1da177e4 LT |
1132 | if (err) |
1133 | goto igmp_fail; | |
2cc7d573 HW |
1134 | err = ipv6_netfilter_init(); |
1135 | if (err) | |
1136 | goto netfilter_fail; | |
1da177e4 LT |
1137 | /* Create /proc/foo6 entries. */ |
1138 | #ifdef CONFIG_PROC_FS | |
1139 | err = -ENOMEM; | |
1140 | if (raw6_proc_init()) | |
1141 | goto proc_raw6_fail; | |
ba4e58ec GR |
1142 | if (udplite6_proc_init()) |
1143 | goto proc_udplite6_fail; | |
1da177e4 LT |
1144 | if (ipv6_misc_proc_init()) |
1145 | goto proc_misc6_fail; | |
1da177e4 LT |
1146 | if (if6_proc_init()) |
1147 | goto proc_if6_fail; | |
1148 | #endif | |
e2fddf5e DL |
1149 | err = ip6_route_init(); |
1150 | if (err) | |
1151 | goto ip6_route_fail; | |
0a3e78ac DL |
1152 | err = ip6_flowlabel_init(); |
1153 | if (err) | |
1154 | goto ip6_flowlabel_fail; | |
1da177e4 LT |
1155 | err = addrconf_init(); |
1156 | if (err) | |
1157 | goto addrconf_fail; | |
1da177e4 LT |
1158 | |
1159 | /* Init v6 extension headers. */ | |
248b238d DL |
1160 | err = ipv6_exthdrs_init(); |
1161 | if (err) | |
1162 | goto ipv6_exthdrs_fail; | |
1163 | ||
853cbbaa DL |
1164 | err = ipv6_frag_init(); |
1165 | if (err) | |
1166 | goto ipv6_frag_fail; | |
1da177e4 LT |
1167 | |
1168 | /* Init v6 transport protocols. */ | |
7f4e4868 DL |
1169 | err = udpv6_init(); |
1170 | if (err) | |
1171 | goto udpv6_fail; | |
e2ed4052 | 1172 | |
7f4e4868 DL |
1173 | err = udplitev6_init(); |
1174 | if (err) | |
1175 | goto udplitev6_fail; | |
1176 | ||
1177 | err = tcpv6_init(); | |
1178 | if (err) | |
1179 | goto tcpv6_fail; | |
1180 | ||
1181 | err = ipv6_packet_init(); | |
1182 | if (err) | |
1183 | goto ipv6_packet_fail; | |
94911fe3 BT |
1184 | |
1185 | #ifdef CONFIG_SYSCTL | |
1186 | err = ipv6_sysctl_register(); | |
1187 | if (err) | |
1188 | goto sysctl_fail; | |
1189 | #endif | |
1da177e4 LT |
1190 | out: |
1191 | return err; | |
1192 | ||
94911fe3 BT |
1193 | #ifdef CONFIG_SYSCTL |
1194 | sysctl_fail: | |
1195 | ipv6_packet_cleanup(); | |
1196 | #endif | |
7f4e4868 DL |
1197 | ipv6_packet_fail: |
1198 | tcpv6_exit(); | |
1199 | tcpv6_fail: | |
1200 | udplitev6_exit(); | |
1201 | udplitev6_fail: | |
1202 | udpv6_exit(); | |
1203 | udpv6_fail: | |
1204 | ipv6_frag_exit(); | |
853cbbaa DL |
1205 | ipv6_frag_fail: |
1206 | ipv6_exthdrs_exit(); | |
248b238d DL |
1207 | ipv6_exthdrs_fail: |
1208 | addrconf_cleanup(); | |
1da177e4 LT |
1209 | addrconf_fail: |
1210 | ip6_flowlabel_cleanup(); | |
0a3e78ac | 1211 | ip6_flowlabel_fail: |
1da177e4 | 1212 | ip6_route_cleanup(); |
e2fddf5e | 1213 | ip6_route_fail: |
1da177e4 LT |
1214 | #ifdef CONFIG_PROC_FS |
1215 | if6_proc_exit(); | |
1216 | proc_if6_fail: | |
1da177e4 LT |
1217 | ipv6_misc_proc_exit(); |
1218 | proc_misc6_fail: | |
ba4e58ec GR |
1219 | udplite6_proc_exit(); |
1220 | proc_udplite6_fail: | |
1da177e4 LT |
1221 | raw6_proc_exit(); |
1222 | proc_raw6_fail: | |
1223 | #endif | |
2cc7d573 HW |
1224 | ipv6_netfilter_fini(); |
1225 | netfilter_fail: | |
1da177e4 LT |
1226 | igmp6_cleanup(); |
1227 | igmp_fail: | |
1228 | ndisc_cleanup(); | |
1229 | ndisc_fail: | |
623d1a1a WC |
1230 | ip6_mr_cleanup(); |
1231 | ipmr_fail: | |
1da177e4 LT |
1232 | icmpv6_cleanup(); |
1233 | icmp_fail: | |
81c1c178 DL |
1234 | unregister_pernet_subsys(&inet6_net_ops); |
1235 | register_pernet_fail: | |
eeb61f71 AV |
1236 | #ifdef CONFIG_SYSCTL |
1237 | ipv6_static_sysctl_unregister(); | |
1238 | static_sysctl_fail: | |
1239 | #endif | |
8eb55910 | 1240 | sock_unregister(PF_INET6); |
e2fddf5e | 1241 | rtnl_unregister_all(PF_INET6); |
7f4e4868 DL |
1242 | out_sock_register_fail: |
1243 | rawv6_exit(); | |
1da177e4 LT |
1244 | out_unregister_raw_proto: |
1245 | proto_unregister(&rawv6_prot); | |
ba4e58ec GR |
1246 | out_unregister_udplite_proto: |
1247 | proto_unregister(&udplitev6_prot); | |
1da177e4 LT |
1248 | out_unregister_udp_proto: |
1249 | proto_unregister(&udpv6_prot); | |
1250 | out_unregister_tcp_proto: | |
1251 | proto_unregister(&tcpv6_prot); | |
1252 | goto out; | |
1253 | } | |
1254 | module_init(inet6_init); | |
1255 | ||
1256 | static void __exit inet6_exit(void) | |
1257 | { | |
56d417b1 | 1258 | if (disable_ipv6_mod) |
ff8cf9a9 JD |
1259 | return; |
1260 | ||
1da177e4 LT |
1261 | /* First of all disallow new sockets creation. */ |
1262 | sock_unregister(PF_INET6); | |
c127ea2c TG |
1263 | /* Disallow any further netlink messages */ |
1264 | rtnl_unregister_all(PF_INET6); | |
ca17c233 | 1265 | |
94911fe3 BT |
1266 | #ifdef CONFIG_SYSCTL |
1267 | ipv6_sysctl_unregister(); | |
1268 | #endif | |
7f4e4868 DL |
1269 | udpv6_exit(); |
1270 | udplitev6_exit(); | |
1271 | tcpv6_exit(); | |
1272 | ||
ca17c233 JJ |
1273 | /* Cleanup code parts. */ |
1274 | ipv6_packet_cleanup(); | |
853cbbaa | 1275 | ipv6_frag_exit(); |
248b238d | 1276 | ipv6_exthdrs_exit(); |
ca17c233 JJ |
1277 | addrconf_cleanup(); |
1278 | ip6_flowlabel_cleanup(); | |
1279 | ip6_route_cleanup(); | |
1da177e4 | 1280 | #ifdef CONFIG_PROC_FS |
ca17c233 JJ |
1281 | |
1282 | /* Cleanup code parts. */ | |
1da177e4 | 1283 | if6_proc_exit(); |
1ab1457c | 1284 | ipv6_misc_proc_exit(); |
1ab1457c | 1285 | udplite6_proc_exit(); |
1ab1457c | 1286 | raw6_proc_exit(); |
2c8d7ca0 | 1287 | #endif |
2cc7d573 | 1288 | ipv6_netfilter_fini(); |
ca17c233 | 1289 | igmp6_cleanup(); |
1da177e4 | 1290 | ndisc_cleanup(); |
623d1a1a | 1291 | ip6_mr_cleanup(); |
1da177e4 | 1292 | icmpv6_cleanup(); |
7f4e4868 | 1293 | rawv6_exit(); |
94911fe3 | 1294 | |
81c1c178 | 1295 | unregister_pernet_subsys(&inet6_net_ops); |
eeb61f71 AV |
1296 | #ifdef CONFIG_SYSCTL |
1297 | ipv6_static_sysctl_unregister(); | |
1298 | #endif | |
1da177e4 | 1299 | proto_unregister(&rawv6_prot); |
ca17c233 | 1300 | proto_unregister(&udplitev6_prot); |
1da177e4 LT |
1301 | proto_unregister(&udpv6_prot); |
1302 | proto_unregister(&tcpv6_prot); | |
1f2ccd00 JDB |
1303 | |
1304 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ | |
1da177e4 LT |
1305 | } |
1306 | module_exit(inet6_exit); | |
1307 | ||
1308 | MODULE_ALIAS_NETPROTO(PF_INET6); |