1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * PF_INET6 socket protocol family |
4 | * Linux INET6 implementation |
5 | * |
6 | * Authors: |
7 | * Pedro Roque <roque@di.fc.ul.pt> |
8 | * |
9 | * Adapted from linux/net/ipv4/af_inet.c |
10 | * |
11 | * Fixes: |
12 | * piggy, Karl Knutson : Socket protocol table |
13 | * Hideaki YOSHIFUJI : sin6_scope_id support |
14 | * Arnaldo Melo : check proc_net_create return, cleanups |
15 | */ |
16 | |
17 | #define pr_fmt(fmt) "IPv6: " fmt |
18 | |
19 | #include <linux/module.h> |
20 | #include <linux/capability.h> |
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> |
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> |
36 | #include <linux/slab.h> |
37 | |
38 | #include <linux/inet.h> |
39 | #include <linux/netdevice.h> |
40 | #include <linux/icmpv6.h> |
41 | #include <linux/netfilter_ipv6.h> |
42 | |
43 | #include <net/ip.h> |
44 | #include <net/ipv6.h> |
45 | #include <net/udp.h> |
46 | #include <net/udplite.h> |
47 | #include <net/tcp.h> |
48 | #include <net/ping.h> |
49 | #include <net/protocol.h> |
50 | #include <net/inet_common.h> |
51 | #include <net/route.h> |
52 | #include <net/transp_v6.h> |
53 | #include <net/ip6_route.h> |
54 | #include <net/addrconf.h> |
55 | #include <net/ipv6_stubs.h> |
56 | #include <net/ndisc.h> |
57 | #ifdef CONFIG_IPV6_TUNNEL |
58 | #include <net/ip6_tunnel.h> |
59 | #endif |
60 | #include <net/calipso.h> |
61 | #include <net/seg6.h> |
62 | #include <net/rpl.h> |
63 | #include <net/compat.h> |
64 | #include <net/xfrm.h> |
65 | #include <net/ioam6.h> |
66 | #include <net/rawv6.h> |
67 | |
68 | #include <linux/uaccess.h> |
69 | #include <linux/mroute6.h> |
70 | |
71 | #include "ip6_offload.h" |
72 | |
73 | MODULE_AUTHOR("Cast of dozens" ); |
74 | MODULE_DESCRIPTION("IPv6 protocol stack for Linux" ); |
75 | MODULE_LICENSE("GPL" ); |
76 | |
77 | /* The inetsw6 table contains everything that inet6_create needs to |
78 | * build a new socket. |
79 | */ |
80 | static struct list_head inetsw6[SOCK_MAX]; |
81 | static DEFINE_SPINLOCK(inetsw6_lock); |
82 | |
83 | struct ipv6_params ipv6_defaults = { |
84 | .disable_ipv6 = 0, |
85 | .autoconf = 1, |
86 | }; |
87 | |
88 | static int disable_ipv6_mod; |
89 | |
90 | module_param_named(disable, disable_ipv6_mod, int, 0444); |
91 | MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional" ); |
92 | |
93 | module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444); |
94 | MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces" ); |
95 | |
96 | module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444); |
97 | MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces" ); |
98 | |
99 | bool ipv6_mod_enabled(void) |
100 | { |
101 | return disable_ipv6_mod == 0; |
102 | } |
103 | EXPORT_SYMBOL_GPL(ipv6_mod_enabled); |
104 | |
105 | static struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) |
106 | { |
107 | const int offset = sk->sk_prot->ipv6_pinfo_offset; |
108 | |
109 | return (struct ipv6_pinfo *)(((u8 *)sk) + offset); |
110 | } |
111 | |
112 | void inet6_sock_destruct(struct sock *sk) |
113 | { |
114 | inet6_cleanup_sock(sk); |
115 | inet_sock_destruct(sk); |
116 | } |
117 | EXPORT_SYMBOL_GPL(inet6_sock_destruct); |
118 | |
119 | static int inet6_create(struct net *net, struct socket *sock, int protocol, |
120 | int kern) |
121 | { |
122 | struct inet_sock *inet; |
123 | struct ipv6_pinfo *np; |
124 | struct sock *sk; |
125 | struct inet_protosw *answer; |
126 | struct proto *answer_prot; |
127 | unsigned char answer_flags; |
128 | int try_loading_module = 0; |
129 | int err; |
130 | |
131 | if (protocol < 0 || protocol >= IPPROTO_MAX) |
132 | return -EINVAL; |
133 | |
134 | /* Look for the requested type/protocol pair. */ |
135 | lookup_protocol: |
136 | err = -ESOCKTNOSUPPORT; |
137 | rcu_read_lock(); |
138 | list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { |
139 | |
140 | err = 0; |
141 | /* Check the non-wild match. */ |
142 | if (protocol == answer->protocol) { |
143 | if (protocol != IPPROTO_IP) |
144 | break; |
145 | } else { |
146 | /* Check for the two wild cases. */ |
147 | if (IPPROTO_IP == protocol) { |
148 | protocol = answer->protocol; |
149 | break; |
150 | } |
151 | if (IPPROTO_IP == answer->protocol) |
152 | break; |
153 | } |
154 | err = -EPROTONOSUPPORT; |
155 | } |
156 | |
157 | if (err) { |
158 | if (try_loading_module < 2) { |
159 | rcu_read_unlock(); |
160 | /* |
161 | * Be more specific, e.g. net-pf-10-proto-132-type-1 |
162 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) |
163 | */ |
164 | if (++try_loading_module == 1) |
165 | request_module("net-pf-%d-proto-%d-type-%d" , |
166 | PF_INET6, protocol, sock->type); |
167 | /* |
168 | * Fall back to generic, e.g. net-pf-10-proto-132 |
169 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP) |
170 | */ |
171 | else |
172 | request_module("net-pf-%d-proto-%d" , |
173 | PF_INET6, protocol); |
174 | goto lookup_protocol; |
175 | } else |
176 | goto out_rcu_unlock; |
177 | } |
178 | |
179 | err = -EPERM; |
180 | if (sock->type == SOCK_RAW && !kern && |
181 | !ns_capable(ns: net->user_ns, CAP_NET_RAW)) |
182 | goto out_rcu_unlock; |
183 | |
184 | sock->ops = answer->ops; |
185 | answer_prot = answer->prot; |
186 | answer_flags = answer->flags; |
187 | rcu_read_unlock(); |
188 | |
189 | WARN_ON(!answer_prot->slab); |
190 | |
191 | err = -ENOBUFS; |
192 | sk = sk_alloc(net, PF_INET6, GFP_KERNEL, prot: answer_prot, kern); |
193 | if (!sk) |
194 | goto out; |
195 | |
196 | sock_init_data(sock, sk); |
197 | |
198 | err = 0; |
199 | if (INET_PROTOSW_REUSE & answer_flags) |
200 | sk->sk_reuse = SK_CAN_REUSE; |
201 | |
202 | inet = inet_sk(sk); |
203 | inet_assign_bit(IS_ICSK, sk, INET_PROTOSW_ICSK & answer_flags); |
204 | |
205 | if (SOCK_RAW == sock->type) { |
206 | inet->inet_num = protocol; |
207 | if (IPPROTO_RAW == protocol) |
208 | inet_set_bit(HDRINCL, sk); |
209 | } |
210 | |
211 | sk->sk_destruct = inet6_sock_destruct; |
212 | sk->sk_family = PF_INET6; |
213 | sk->sk_protocol = protocol; |
214 | |
215 | sk->sk_backlog_rcv = answer->prot->backlog_rcv; |
216 | |
217 | inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); |
218 | np->hop_limit = -1; |
219 | np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; |
220 | inet6_set_bit(MC6_LOOP, sk); |
221 | inet6_set_bit(MC6_ALL, sk); |
222 | np->pmtudisc = IPV6_PMTUDISC_WANT; |
223 | inet6_assign_bit(REPFLOW, sk, net->ipv6.sysctl.flowlabel_reflect & |
224 | FLOWLABEL_REFLECT_ESTABLISHED); |
225 | sk->sk_ipv6only = net->ipv6.sysctl.bindv6only; |
226 | sk->sk_txrehash = READ_ONCE(net->core.sysctl_txrehash); |
227 | |
228 | /* Init the ipv4 part of the socket since we can have sockets |
229 | * using v6 API for ipv4. |
230 | */ |
231 | inet->uc_ttl = -1; |
232 | |
233 | inet_set_bit(MC_LOOP, sk); |
234 | inet->mc_ttl = 1; |
235 | inet->mc_index = 0; |
236 | RCU_INIT_POINTER(inet->mc_list, NULL); |
237 | inet->rcv_tos = 0; |
238 | |
239 | if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc)) |
240 | inet->pmtudisc = IP_PMTUDISC_DONT; |
241 | else |
242 | inet->pmtudisc = IP_PMTUDISC_WANT; |
243 | |
244 | if (inet->inet_num) { |
245 | /* It assumes that any protocol which allows |
246 | * the user to assign a number at socket |
247 | * creation time automatically shares. |
248 | */ |
249 | inet->inet_sport = htons(inet->inet_num); |
250 | err = sk->sk_prot->hash(sk); |
251 | if (err) { |
252 | sk_common_release(sk); |
253 | goto out; |
254 | } |
255 | } |
256 | if (sk->sk_prot->init) { |
257 | err = sk->sk_prot->init(sk); |
258 | if (err) { |
259 | sk_common_release(sk); |
260 | goto out; |
261 | } |
262 | } |
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 | } |
271 | out: |
272 | return err; |
273 | out_rcu_unlock: |
274 | rcu_read_unlock(); |
275 | goto out; |
276 | } |
277 | |
278 | static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len, |
279 | u32 flags) |
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: 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 | |
291 | if (addr->sin6_family != AF_INET6) |
292 | return -EAFNOSUPPORT; |
293 | |
294 | addr_type = ipv6_addr_type(addr: &addr->sin6_addr); |
295 | if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM) |
296 | return -EINVAL; |
297 | |
298 | snum = ntohs(addr->sin6_port); |
299 | if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) && |
300 | snum && inet_port_requires_bind_service(net, port: snum) && |
301 | !ns_capable(ns: net->user_ns, CAP_NET_BIND_SERVICE)) |
302 | return -EACCES; |
303 | |
304 | if (flags & BIND_WITH_LOCK) |
305 | lock_sock(sk); |
306 | |
307 | /* Check these errors (active socket, double bind). */ |
308 | if (sk->sk_state != TCP_CLOSE || inet->inet_num) { |
309 | err = -EINVAL; |
310 | goto out; |
311 | } |
312 | |
313 | /* Check if the address belongs to the host. */ |
314 | if (addr_type == IPV6_ADDR_MAPPED) { |
315 | struct net_device *dev = NULL; |
316 | int chk_addr_ret; |
317 | |
318 | /* Binding to v4-mapped address on a v6-only socket |
319 | * makes no sense |
320 | */ |
321 | if (ipv6_only_sock(sk)) { |
322 | err = -EINVAL; |
323 | goto out; |
324 | } |
325 | |
326 | rcu_read_lock(); |
327 | if (sk->sk_bound_dev_if) { |
328 | dev = dev_get_by_index_rcu(net, ifindex: sk->sk_bound_dev_if); |
329 | if (!dev) { |
330 | err = -ENODEV; |
331 | goto out_unlock; |
332 | } |
333 | } |
334 | |
335 | /* Reproduce AF_INET checks to make the bindings consistent */ |
336 | v4addr = addr->sin6_addr.s6_addr32[3]; |
337 | chk_addr_ret = inet_addr_type_dev_table(net, dev, addr: v4addr); |
338 | rcu_read_unlock(); |
339 | |
340 | if (!inet_addr_valid_or_nonlocal(net, inet, addr: v4addr, |
341 | addr_type: chk_addr_ret)) { |
342 | err = -EADDRNOTAVAIL; |
343 | goto out; |
344 | } |
345 | } else { |
346 | if (addr_type != IPV6_ADDR_ANY) { |
347 | struct net_device *dev = NULL; |
348 | |
349 | rcu_read_lock(); |
350 | if (__ipv6_addr_needs_scope_id(type: addr_type)) { |
351 | if (addr_len >= sizeof(struct sockaddr_in6) && |
352 | addr->sin6_scope_id) { |
353 | /* Override any existing binding, if another one |
354 | * is supplied by user. |
355 | */ |
356 | sk->sk_bound_dev_if = addr->sin6_scope_id; |
357 | } |
358 | |
359 | /* Binding to link-local address requires an interface */ |
360 | if (!sk->sk_bound_dev_if) { |
361 | err = -EINVAL; |
362 | goto out_unlock; |
363 | } |
364 | } |
365 | |
366 | if (sk->sk_bound_dev_if) { |
367 | dev = dev_get_by_index_rcu(net, ifindex: sk->sk_bound_dev_if); |
368 | if (!dev) { |
369 | err = -ENODEV; |
370 | goto out_unlock; |
371 | } |
372 | } |
373 | |
374 | /* ipv4 addr of the socket is invalid. Only the |
375 | * unspecified and mapped address have a v4 equivalent. |
376 | */ |
377 | v4addr = LOOPBACK4_IPV6; |
378 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { |
379 | if (!ipv6_can_nonlocal_bind(net, inet) && |
380 | !ipv6_chk_addr(net, addr: &addr->sin6_addr, |
381 | dev, strict: 0)) { |
382 | err = -EADDRNOTAVAIL; |
383 | goto out_unlock; |
384 | } |
385 | } |
386 | rcu_read_unlock(); |
387 | } |
388 | } |
389 | |
390 | inet->inet_rcv_saddr = v4addr; |
391 | inet->inet_saddr = v4addr; |
392 | |
393 | sk->sk_v6_rcv_saddr = addr->sin6_addr; |
394 | |
395 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
396 | np->saddr = addr->sin6_addr; |
397 | |
398 | saved_ipv6only = sk->sk_ipv6only; |
399 | if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED) |
400 | sk->sk_ipv6only = 1; |
401 | |
402 | /* Make sure we are allowed to bind here. */ |
403 | if (snum || !(inet_test_bit(BIND_ADDRESS_NO_PORT, sk) || |
404 | (flags & BIND_FORCE_ADDRESS_NO_PORT))) { |
405 | err = sk->sk_prot->get_port(sk, snum); |
406 | if (err) { |
407 | sk->sk_ipv6only = saved_ipv6only; |
408 | inet_reset_saddr(sk); |
409 | goto out; |
410 | } |
411 | if (!(flags & BIND_FROM_BPF)) { |
412 | err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk); |
413 | if (err) { |
414 | sk->sk_ipv6only = saved_ipv6only; |
415 | inet_reset_saddr(sk); |
416 | if (sk->sk_prot->put_port) |
417 | sk->sk_prot->put_port(sk); |
418 | goto out; |
419 | } |
420 | } |
421 | } |
422 | |
423 | if (addr_type != IPV6_ADDR_ANY) |
424 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
425 | if (snum) |
426 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; |
427 | inet->inet_sport = htons(inet->inet_num); |
428 | inet->inet_dport = 0; |
429 | inet->inet_daddr = 0; |
430 | out: |
431 | if (flags & BIND_WITH_LOCK) |
432 | release_sock(sk); |
433 | return err; |
434 | out_unlock: |
435 | rcu_read_unlock(); |
436 | goto out; |
437 | } |
438 | |
439 | int inet6_bind_sk(struct sock *sk, struct sockaddr *uaddr, int addr_len) |
440 | { |
441 | u32 flags = BIND_WITH_LOCK; |
442 | const struct proto *prot; |
443 | int err = 0; |
444 | |
445 | /* IPV6_ADDRFORM can change sk->sk_prot under us. */ |
446 | prot = READ_ONCE(sk->sk_prot); |
447 | /* If the socket has its own bind function then use it. */ |
448 | if (prot->bind) |
449 | return 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 | */ |
457 | err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, &addr_len, |
458 | CGROUP_INET6_BIND, &flags); |
459 | if (err) |
460 | return err; |
461 | |
462 | return __inet6_bind(sk, uaddr, addr_len, flags); |
463 | } |
464 | |
465 | /* bind for INET6 API */ |
466 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
467 | { |
468 | return inet6_bind_sk(sk: sock->sk, uaddr, addr_len); |
469 | } |
470 | EXPORT_SYMBOL(inet6_bind); |
471 | |
472 | int inet6_release(struct socket *sock) |
473 | { |
474 | struct sock *sk = sock->sk; |
475 | |
476 | if (!sk) |
477 | return -EINVAL; |
478 | |
479 | /* Free mc lists */ |
480 | ipv6_sock_mc_close(sk); |
481 | |
482 | /* Free ac lists */ |
483 | ipv6_sock_ac_close(sk); |
484 | |
485 | return inet_release(sock); |
486 | } |
487 | EXPORT_SYMBOL(inet6_release); |
488 | |
489 | void inet6_cleanup_sock(struct sock *sk) |
490 | { |
491 | struct ipv6_pinfo *np = inet6_sk(sk: sk); |
492 | struct sk_buff *skb; |
493 | struct ipv6_txoptions *opt; |
494 | |
495 | /* Release rx options */ |
496 | |
497 | skb = xchg(&np->pktoptions, NULL); |
498 | kfree_skb(skb); |
499 | |
500 | skb = xchg(&np->rxpmtu, NULL); |
501 | kfree_skb(skb); |
502 | |
503 | /* Free flowlabels */ |
504 | fl6_free_socklist(sk); |
505 | |
506 | /* Free tx options */ |
507 | |
508 | opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL); |
509 | if (opt) { |
510 | atomic_sub(i: opt->tot_len, v: &sk->sk_omem_alloc); |
511 | txopt_put(opt); |
512 | } |
513 | } |
514 | EXPORT_SYMBOL_GPL(inet6_cleanup_sock); |
515 | |
516 | /* |
517 | * This does both peername and sockname. |
518 | */ |
519 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
520 | int peer) |
521 | { |
522 | struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr; |
523 | int sin_addr_len = sizeof(*sin); |
524 | struct sock *sk = sock->sk; |
525 | struct inet_sock *inet = inet_sk(sk); |
526 | struct ipv6_pinfo *np = inet6_sk(sk: sk); |
527 | |
528 | sin->sin6_family = AF_INET6; |
529 | sin->sin6_flowinfo = 0; |
530 | sin->sin6_scope_id = 0; |
531 | lock_sock(sk); |
532 | if (peer) { |
533 | if (!inet->inet_dport || |
534 | (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && |
535 | peer == 1)) { |
536 | release_sock(sk); |
537 | return -ENOTCONN; |
538 | } |
539 | sin->sin6_port = inet->inet_dport; |
540 | sin->sin6_addr = sk->sk_v6_daddr; |
541 | if (inet6_test_bit(SNDFLOW, sk)) |
542 | sin->sin6_flowinfo = np->flow_label; |
543 | BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len, |
544 | CGROUP_INET6_GETPEERNAME); |
545 | } else { |
546 | if (ipv6_addr_any(a: &sk->sk_v6_rcv_saddr)) |
547 | sin->sin6_addr = np->saddr; |
548 | else |
549 | sin->sin6_addr = sk->sk_v6_rcv_saddr; |
550 | sin->sin6_port = inet->inet_sport; |
551 | BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len, |
552 | CGROUP_INET6_GETSOCKNAME); |
553 | } |
554 | sin->sin6_scope_id = ipv6_iface_scope_id(addr: &sin->sin6_addr, |
555 | iface: sk->sk_bound_dev_if); |
556 | release_sock(sk); |
557 | return sin_addr_len; |
558 | } |
559 | EXPORT_SYMBOL(inet6_getname); |
560 | |
561 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
562 | { |
563 | void __user *argp = (void __user *)arg; |
564 | struct sock *sk = sock->sk; |
565 | struct net *net = sock_net(sk); |
566 | const struct proto *prot; |
567 | |
568 | switch (cmd) { |
569 | case SIOCADDRT: |
570 | case SIOCDELRT: { |
571 | struct in6_rtmsg rtmsg; |
572 | |
573 | if (copy_from_user(to: &rtmsg, from: argp, n: sizeof(rtmsg))) |
574 | return -EFAULT; |
575 | return ipv6_route_ioctl(net, cmd, rtmsg: &rtmsg); |
576 | } |
577 | case SIOCSIFADDR: |
578 | return addrconf_add_ifaddr(net, arg: argp); |
579 | case SIOCDIFADDR: |
580 | return addrconf_del_ifaddr(net, arg: argp); |
581 | case SIOCSIFDSTADDR: |
582 | return addrconf_set_dstaddr(net, arg: argp); |
583 | default: |
584 | /* IPV6_ADDRFORM can change sk->sk_prot under us. */ |
585 | prot = READ_ONCE(sk->sk_prot); |
586 | if (!prot->ioctl) |
587 | return -ENOIOCTLCMD; |
588 | return sk_ioctl(sk, cmd, arg: (void __user *)arg); |
589 | } |
590 | /*NOTREACHED*/ |
591 | return 0; |
592 | } |
593 | EXPORT_SYMBOL(inet6_ioctl); |
594 | |
595 | #ifdef CONFIG_COMPAT |
596 | struct compat_in6_rtmsg { |
597 | struct in6_addr rtmsg_dst; |
598 | struct in6_addr rtmsg_src; |
599 | struct in6_addr rtmsg_gateway; |
600 | u32 rtmsg_type; |
601 | u16 rtmsg_dst_len; |
602 | u16 rtmsg_src_len; |
603 | u32 rtmsg_metric; |
604 | u32 rtmsg_info; |
605 | u32 rtmsg_flags; |
606 | s32 rtmsg_ifindex; |
607 | }; |
608 | |
609 | static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd, |
610 | struct compat_in6_rtmsg __user *ur) |
611 | { |
612 | struct in6_rtmsg rt; |
613 | |
614 | if (copy_from_user(to: &rt.rtmsg_dst, from: &ur->rtmsg_dst, |
615 | n: 3 * sizeof(struct in6_addr)) || |
616 | get_user(rt.rtmsg_type, &ur->rtmsg_type) || |
617 | get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) || |
618 | get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) || |
619 | get_user(rt.rtmsg_metric, &ur->rtmsg_metric) || |
620 | get_user(rt.rtmsg_info, &ur->rtmsg_info) || |
621 | get_user(rt.rtmsg_flags, &ur->rtmsg_flags) || |
622 | get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex)) |
623 | return -EFAULT; |
624 | |
625 | |
626 | return ipv6_route_ioctl(net: sock_net(sk), cmd, rtmsg: &rt); |
627 | } |
628 | |
629 | int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
630 | { |
631 | void __user *argp = compat_ptr(uptr: arg); |
632 | struct sock *sk = sock->sk; |
633 | |
634 | switch (cmd) { |
635 | case SIOCADDRT: |
636 | case SIOCDELRT: |
637 | return inet6_compat_routing_ioctl(sk, cmd, ur: argp); |
638 | default: |
639 | return -ENOIOCTLCMD; |
640 | } |
641 | } |
642 | EXPORT_SYMBOL_GPL(inet6_compat_ioctl); |
643 | #endif /* CONFIG_COMPAT */ |
644 | |
645 | INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *, |
646 | size_t)); |
647 | int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
648 | { |
649 | struct sock *sk = sock->sk; |
650 | const struct proto *prot; |
651 | |
652 | if (unlikely(inet_send_prepare(sk))) |
653 | return -EAGAIN; |
654 | |
655 | /* IPV6_ADDRFORM can change sk->sk_prot under us. */ |
656 | prot = READ_ONCE(sk->sk_prot); |
657 | return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg, |
658 | sk, msg, size); |
659 | } |
660 | |
661 | INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *, |
662 | size_t, int, int *)); |
663 | int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
664 | int flags) |
665 | { |
666 | struct sock *sk = sock->sk; |
667 | const struct proto *prot; |
668 | int addr_len = 0; |
669 | int err; |
670 | |
671 | if (likely(!(flags & MSG_ERRQUEUE))) |
672 | sock_rps_record_flow(sk); |
673 | |
674 | /* IPV6_ADDRFORM can change sk->sk_prot under us. */ |
675 | prot = READ_ONCE(sk->sk_prot); |
676 | err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg, |
677 | sk, msg, size, flags, &addr_len); |
678 | if (err >= 0) |
679 | msg->msg_namelen = addr_len; |
680 | return err; |
681 | } |
682 | |
683 | const struct proto_ops inet6_stream_ops = { |
684 | .family = PF_INET6, |
685 | .owner = THIS_MODULE, |
686 | .release = inet6_release, |
687 | .bind = inet6_bind, |
688 | .connect = inet_stream_connect, /* ok */ |
689 | .socketpair = sock_no_socketpair, /* a do nothing */ |
690 | .accept = inet_accept, /* ok */ |
691 | .getname = inet6_getname, |
692 | .poll = tcp_poll, /* ok */ |
693 | .ioctl = inet6_ioctl, /* must change */ |
694 | .gettstamp = sock_gettstamp, |
695 | .listen = inet_listen, /* ok */ |
696 | .shutdown = inet_shutdown, /* ok */ |
697 | .setsockopt = sock_common_setsockopt, /* ok */ |
698 | .getsockopt = sock_common_getsockopt, /* ok */ |
699 | .sendmsg = inet6_sendmsg, /* retpoline's sake */ |
700 | .recvmsg = inet6_recvmsg, /* retpoline's sake */ |
701 | #ifdef CONFIG_MMU |
702 | .mmap = tcp_mmap, |
703 | #endif |
704 | .splice_eof = inet_splice_eof, |
705 | .sendmsg_locked = tcp_sendmsg_locked, |
706 | .splice_read = tcp_splice_read, |
707 | .read_sock = tcp_read_sock, |
708 | .read_skb = tcp_read_skb, |
709 | .peek_len = tcp_peek_len, |
710 | #ifdef CONFIG_COMPAT |
711 | .compat_ioctl = inet6_compat_ioctl, |
712 | #endif |
713 | .set_rcvlowat = tcp_set_rcvlowat, |
714 | }; |
715 | |
716 | const struct proto_ops inet6_dgram_ops = { |
717 | .family = PF_INET6, |
718 | .owner = THIS_MODULE, |
719 | .release = inet6_release, |
720 | .bind = inet6_bind, |
721 | .connect = inet_dgram_connect, /* ok */ |
722 | .socketpair = sock_no_socketpair, /* a do nothing */ |
723 | .accept = sock_no_accept, /* a do nothing */ |
724 | .getname = inet6_getname, |
725 | .poll = udp_poll, /* ok */ |
726 | .ioctl = inet6_ioctl, /* must change */ |
727 | .gettstamp = sock_gettstamp, |
728 | .listen = sock_no_listen, /* ok */ |
729 | .shutdown = inet_shutdown, /* ok */ |
730 | .setsockopt = sock_common_setsockopt, /* ok */ |
731 | .getsockopt = sock_common_getsockopt, /* ok */ |
732 | .sendmsg = inet6_sendmsg, /* retpoline's sake */ |
733 | .recvmsg = inet6_recvmsg, /* retpoline's sake */ |
734 | .read_skb = udp_read_skb, |
735 | .mmap = sock_no_mmap, |
736 | .set_peek_off = sk_set_peek_off, |
737 | #ifdef CONFIG_COMPAT |
738 | .compat_ioctl = inet6_compat_ioctl, |
739 | #endif |
740 | }; |
741 | |
742 | static const struct net_proto_family inet6_family_ops = { |
743 | .family = PF_INET6, |
744 | .create = inet6_create, |
745 | .owner = THIS_MODULE, |
746 | }; |
747 | |
748 | int inet6_register_protosw(struct inet_protosw *p) |
749 | { |
750 | struct list_head *lh; |
751 | struct inet_protosw *answer; |
752 | struct list_head *last_perm; |
753 | int protocol = p->protocol; |
754 | int ret; |
755 | |
756 | spin_lock_bh(lock: &inetsw6_lock); |
757 | |
758 | ret = -EINVAL; |
759 | if (p->type >= SOCK_MAX) |
760 | goto out_illegal; |
761 | |
762 | /* If we are trying to override a permanent protocol, bail. */ |
763 | answer = NULL; |
764 | ret = -EPERM; |
765 | last_perm = &inetsw6[p->type]; |
766 | list_for_each(lh, &inetsw6[p->type]) { |
767 | answer = list_entry(lh, struct inet_protosw, list); |
768 | |
769 | /* Check only the non-wild match. */ |
770 | if (INET_PROTOSW_PERMANENT & answer->flags) { |
771 | if (protocol == answer->protocol) |
772 | break; |
773 | last_perm = lh; |
774 | } |
775 | |
776 | answer = NULL; |
777 | } |
778 | if (answer) |
779 | goto out_permanent; |
780 | |
781 | /* Add the new entry after the last permanent entry if any, so that |
782 | * the new entry does not override a permanent entry when matched with |
783 | * a wild-card protocol. But it is allowed to override any existing |
784 | * non-permanent entry. This means that when we remove this entry, the |
785 | * system automatically returns to the old behavior. |
786 | */ |
787 | list_add_rcu(new: &p->list, head: last_perm); |
788 | ret = 0; |
789 | out: |
790 | spin_unlock_bh(lock: &inetsw6_lock); |
791 | return ret; |
792 | |
793 | out_permanent: |
794 | pr_err("Attempt to override permanent protocol %d\n" , protocol); |
795 | goto out; |
796 | |
797 | out_illegal: |
798 | pr_err("Ignoring attempt to register invalid socket type %d\n" , |
799 | p->type); |
800 | goto out; |
801 | } |
802 | EXPORT_SYMBOL(inet6_register_protosw); |
803 | |
804 | void |
805 | inet6_unregister_protosw(struct inet_protosw *p) |
806 | { |
807 | if (INET_PROTOSW_PERMANENT & p->flags) { |
808 | pr_err("Attempt to unregister permanent protocol %d\n" , |
809 | p->protocol); |
810 | } else { |
811 | spin_lock_bh(lock: &inetsw6_lock); |
812 | list_del_rcu(entry: &p->list); |
813 | spin_unlock_bh(lock: &inetsw6_lock); |
814 | |
815 | synchronize_net(); |
816 | } |
817 | } |
818 | EXPORT_SYMBOL(inet6_unregister_protosw); |
819 | |
820 | int (struct sock *sk) |
821 | { |
822 | struct ipv6_pinfo *np = inet6_sk(sk: sk); |
823 | struct dst_entry *dst; |
824 | |
825 | dst = __sk_dst_check(sk, cookie: np->dst_cookie); |
826 | |
827 | if (!dst) { |
828 | struct inet_sock *inet = inet_sk(sk); |
829 | struct in6_addr *final_p, final; |
830 | struct flowi6 fl6; |
831 | |
832 | memset(&fl6, 0, sizeof(fl6)); |
833 | fl6.flowi6_proto = sk->sk_protocol; |
834 | fl6.daddr = sk->sk_v6_daddr; |
835 | fl6.saddr = np->saddr; |
836 | fl6.flowlabel = np->flow_label; |
837 | fl6.flowi6_oif = sk->sk_bound_dev_if; |
838 | fl6.flowi6_mark = sk->sk_mark; |
839 | fl6.fl6_dport = inet->inet_dport; |
840 | fl6.fl6_sport = inet->inet_sport; |
841 | fl6.flowi6_uid = sk->sk_uid; |
842 | security_sk_classify_flow(sk, flic: flowi6_to_flowi_common(fl6: &fl6)); |
843 | |
844 | rcu_read_lock(); |
845 | final_p = fl6_update_dst(fl6: &fl6, rcu_dereference(np->opt), |
846 | orig: &final); |
847 | rcu_read_unlock(); |
848 | |
849 | dst = ip6_dst_lookup_flow(net: sock_net(sk), sk, fl6: &fl6, final_dst: final_p); |
850 | if (IS_ERR(ptr: dst)) { |
851 | sk->sk_route_caps = 0; |
852 | WRITE_ONCE(sk->sk_err_soft, -PTR_ERR(dst)); |
853 | return PTR_ERR(ptr: dst); |
854 | } |
855 | |
856 | ip6_dst_store(sk, dst, NULL, NULL); |
857 | } |
858 | |
859 | return 0; |
860 | } |
861 | EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); |
862 | |
863 | bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, |
864 | const struct inet6_skb_parm *opt) |
865 | { |
866 | const struct ipv6_pinfo *np = inet6_sk(sk: sk); |
867 | |
868 | if (np->rxopt.all) { |
869 | if (((opt->flags & IP6SKB_HOPBYHOP) && |
870 | (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) || |
871 | (ip6_flowinfo(hdr: (struct ipv6hdr *) skb_network_header(skb)) && |
872 | np->rxopt.bits.rxflow) || |
873 | (opt->srcrt && (np->rxopt.bits.srcrt || |
874 | np->rxopt.bits.osrcrt)) || |
875 | ((opt->dst1 || opt->dst0) && |
876 | (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) |
877 | return true; |
878 | } |
879 | return false; |
880 | } |
881 | EXPORT_SYMBOL_GPL(ipv6_opt_accepted); |
882 | |
883 | static struct packet_type ipv6_packet_type __read_mostly = { |
884 | .type = cpu_to_be16(ETH_P_IPV6), |
885 | .func = ipv6_rcv, |
886 | .list_func = ipv6_list_rcv, |
887 | }; |
888 | |
889 | static int __init ipv6_packet_init(void) |
890 | { |
891 | dev_add_pack(pt: &ipv6_packet_type); |
892 | return 0; |
893 | } |
894 | |
895 | static void ipv6_packet_cleanup(void) |
896 | { |
897 | dev_remove_pack(pt: &ipv6_packet_type); |
898 | } |
899 | |
900 | static int __net_init ipv6_init_mibs(struct net *net) |
901 | { |
902 | int i; |
903 | |
904 | net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib); |
905 | if (!net->mib.udp_stats_in6) |
906 | return -ENOMEM; |
907 | net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib); |
908 | if (!net->mib.udplite_stats_in6) |
909 | goto err_udplite_mib; |
910 | net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib); |
911 | if (!net->mib.ipv6_statistics) |
912 | goto err_ip_mib; |
913 | |
914 | for_each_possible_cpu(i) { |
915 | struct ipstats_mib *af_inet6_stats; |
916 | af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i); |
917 | u64_stats_init(syncp: &af_inet6_stats->syncp); |
918 | } |
919 | |
920 | |
921 | net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib); |
922 | if (!net->mib.icmpv6_statistics) |
923 | goto err_icmp_mib; |
924 | net->mib.icmpv6msg_statistics = kzalloc(size: sizeof(struct icmpv6msg_mib), |
925 | GFP_KERNEL); |
926 | if (!net->mib.icmpv6msg_statistics) |
927 | goto err_icmpmsg_mib; |
928 | return 0; |
929 | |
930 | err_icmpmsg_mib: |
931 | free_percpu(pdata: net->mib.icmpv6_statistics); |
932 | err_icmp_mib: |
933 | free_percpu(pdata: net->mib.ipv6_statistics); |
934 | err_ip_mib: |
935 | free_percpu(pdata: net->mib.udplite_stats_in6); |
936 | err_udplite_mib: |
937 | free_percpu(pdata: net->mib.udp_stats_in6); |
938 | return -ENOMEM; |
939 | } |
940 | |
941 | static void ipv6_cleanup_mibs(struct net *net) |
942 | { |
943 | free_percpu(pdata: net->mib.udp_stats_in6); |
944 | free_percpu(pdata: net->mib.udplite_stats_in6); |
945 | free_percpu(pdata: net->mib.ipv6_statistics); |
946 | free_percpu(pdata: net->mib.icmpv6_statistics); |
947 | kfree(objp: net->mib.icmpv6msg_statistics); |
948 | } |
949 | |
950 | static int __net_init inet6_net_init(struct net *net) |
951 | { |
952 | int err = 0; |
953 | |
954 | net->ipv6.sysctl.bindv6only = 0; |
955 | net->ipv6.sysctl.icmpv6_time = 1*HZ; |
956 | net->ipv6.sysctl.icmpv6_echo_ignore_all = 0; |
957 | net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0; |
958 | net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0; |
959 | net->ipv6.sysctl.icmpv6_error_anycast_as_unicast = 0; |
960 | |
961 | /* By default, rate limit error messages. |
962 | * Except for pmtu discovery, it would break it. |
963 | * proc_do_large_bitmap needs pointer to the bitmap. |
964 | */ |
965 | bitmap_set(map: net->ipv6.sysctl.icmpv6_ratemask, start: 0, ICMPV6_ERRMSG_MAX + 1); |
966 | bitmap_clear(map: net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, nbits: 1); |
967 | net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask; |
968 | |
969 | net->ipv6.sysctl.flowlabel_consistency = 1; |
970 | net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS; |
971 | net->ipv6.sysctl.idgen_retries = 3; |
972 | net->ipv6.sysctl.idgen_delay = 1 * HZ; |
973 | net->ipv6.sysctl.flowlabel_state_ranges = 0; |
974 | net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT; |
975 | net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT; |
976 | net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN; |
977 | net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN; |
978 | net->ipv6.sysctl.fib_notify_on_flag_change = 0; |
979 | atomic_set(v: &net->ipv6.fib6_sernum, i: 1); |
980 | |
981 | net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID; |
982 | net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE; |
983 | |
984 | err = ipv6_init_mibs(net); |
985 | if (err) |
986 | return err; |
987 | #ifdef CONFIG_PROC_FS |
988 | err = udp6_proc_init(net); |
989 | if (err) |
990 | goto out; |
991 | err = tcp6_proc_init(net); |
992 | if (err) |
993 | goto proc_tcp6_fail; |
994 | err = ac6_proc_init(net); |
995 | if (err) |
996 | goto proc_ac6_fail; |
997 | #endif |
998 | return err; |
999 | |
1000 | #ifdef CONFIG_PROC_FS |
1001 | proc_ac6_fail: |
1002 | tcp6_proc_exit(net); |
1003 | proc_tcp6_fail: |
1004 | udp6_proc_exit(net); |
1005 | out: |
1006 | ipv6_cleanup_mibs(net); |
1007 | return err; |
1008 | #endif |
1009 | } |
1010 | |
1011 | static void __net_exit inet6_net_exit(struct net *net) |
1012 | { |
1013 | #ifdef CONFIG_PROC_FS |
1014 | udp6_proc_exit(net); |
1015 | tcp6_proc_exit(net); |
1016 | ac6_proc_exit(net); |
1017 | #endif |
1018 | ipv6_cleanup_mibs(net); |
1019 | } |
1020 | |
1021 | static struct pernet_operations inet6_net_ops = { |
1022 | .init = inet6_net_init, |
1023 | .exit = inet6_net_exit, |
1024 | }; |
1025 | |
1026 | static int ipv6_route_input(struct sk_buff *skb) |
1027 | { |
1028 | ip6_route_input(skb); |
1029 | return skb_dst(skb)->error; |
1030 | } |
1031 | |
1032 | static const struct ipv6_stub ipv6_stub_impl = { |
1033 | .ipv6_sock_mc_join = ipv6_sock_mc_join, |
1034 | .ipv6_sock_mc_drop = ipv6_sock_mc_drop, |
1035 | .ipv6_dst_lookup_flow = ip6_dst_lookup_flow, |
1036 | .ipv6_route_input = ipv6_route_input, |
1037 | .fib6_get_table = fib6_get_table, |
1038 | .fib6_table_lookup = fib6_table_lookup, |
1039 | .fib6_lookup = fib6_lookup, |
1040 | .fib6_select_path = fib6_select_path, |
1041 | .ip6_mtu_from_fib6 = ip6_mtu_from_fib6, |
1042 | .fib6_nh_init = fib6_nh_init, |
1043 | .fib6_nh_release = fib6_nh_release, |
1044 | .fib6_nh_release_dsts = fib6_nh_release_dsts, |
1045 | .fib6_update_sernum = fib6_update_sernum_stub, |
1046 | .fib6_rt_update = fib6_rt_update, |
1047 | .ip6_del_rt = ip6_del_rt, |
1048 | .udpv6_encap_enable = udpv6_encap_enable, |
1049 | .ndisc_send_na = ndisc_send_na, |
1050 | #if IS_ENABLED(CONFIG_XFRM) |
1051 | .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu, |
1052 | .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv, |
1053 | .xfrm6_gro_udp_encap_rcv = xfrm6_gro_udp_encap_rcv, |
1054 | .xfrm6_rcv_encap = xfrm6_rcv_encap, |
1055 | #endif |
1056 | .nd_tbl = &nd_tbl, |
1057 | .ipv6_fragment = ip6_fragment, |
1058 | .ipv6_dev_find = ipv6_dev_find, |
1059 | }; |
1060 | |
1061 | static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = { |
1062 | .inet6_bind = __inet6_bind, |
1063 | .udp6_lib_lookup = __udp6_lib_lookup, |
1064 | .ipv6_setsockopt = do_ipv6_setsockopt, |
1065 | .ipv6_getsockopt = do_ipv6_getsockopt, |
1066 | .ipv6_dev_get_saddr = ipv6_dev_get_saddr, |
1067 | }; |
1068 | |
1069 | static int __init inet6_init(void) |
1070 | { |
1071 | struct list_head *r; |
1072 | int err = 0; |
1073 | |
1074 | sock_skb_cb_check_size(sizeof(struct inet6_skb_parm)); |
1075 | |
1076 | /* Register the socket-side information for inet6_create. */ |
1077 | for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) |
1078 | INIT_LIST_HEAD(list: r); |
1079 | |
1080 | raw_hashinfo_init(hashinfo: &raw_v6_hashinfo); |
1081 | |
1082 | if (disable_ipv6_mod) { |
1083 | pr_info("Loaded, but administratively disabled, reboot required to enable\n" ); |
1084 | goto out; |
1085 | } |
1086 | |
1087 | err = proto_register(prot: &tcpv6_prot, alloc_slab: 1); |
1088 | if (err) |
1089 | goto out; |
1090 | |
1091 | err = proto_register(prot: &udpv6_prot, alloc_slab: 1); |
1092 | if (err) |
1093 | goto out_unregister_tcp_proto; |
1094 | |
1095 | err = proto_register(prot: &udplitev6_prot, alloc_slab: 1); |
1096 | if (err) |
1097 | goto out_unregister_udp_proto; |
1098 | |
1099 | err = proto_register(prot: &rawv6_prot, alloc_slab: 1); |
1100 | if (err) |
1101 | goto out_unregister_udplite_proto; |
1102 | |
1103 | err = proto_register(prot: &pingv6_prot, alloc_slab: 1); |
1104 | if (err) |
1105 | goto out_unregister_raw_proto; |
1106 | |
1107 | /* We MUST register RAW sockets before we create the ICMP6, |
1108 | * IGMP6, or NDISC control sockets. |
1109 | */ |
1110 | err = rawv6_init(); |
1111 | if (err) |
1112 | goto out_unregister_ping_proto; |
1113 | |
1114 | /* Register the family here so that the init calls below will |
1115 | * be able to create sockets. (?? is this dangerous ??) |
1116 | */ |
1117 | err = sock_register(fam: &inet6_family_ops); |
1118 | if (err) |
1119 | goto out_sock_register_fail; |
1120 | |
1121 | /* |
1122 | * ipngwg API draft makes clear that the correct semantics |
1123 | * for TCP and UDP is to consider one TCP and UDP instance |
1124 | * in a host available by both INET and INET6 APIs and |
1125 | * able to communicate via both network protocols. |
1126 | */ |
1127 | |
1128 | err = register_pernet_subsys(&inet6_net_ops); |
1129 | if (err) |
1130 | goto register_pernet_fail; |
1131 | err = ip6_mr_init(); |
1132 | if (err) |
1133 | goto ipmr_fail; |
1134 | err = icmpv6_init(); |
1135 | if (err) |
1136 | goto icmp_fail; |
1137 | err = ndisc_init(); |
1138 | if (err) |
1139 | goto ndisc_fail; |
1140 | err = igmp6_init(); |
1141 | if (err) |
1142 | goto igmp_fail; |
1143 | |
1144 | err = ipv6_netfilter_init(); |
1145 | if (err) |
1146 | goto netfilter_fail; |
1147 | /* Create /proc/foo6 entries. */ |
1148 | #ifdef CONFIG_PROC_FS |
1149 | err = -ENOMEM; |
1150 | if (raw6_proc_init()) |
1151 | goto proc_raw6_fail; |
1152 | if (udplite6_proc_init()) |
1153 | goto proc_udplite6_fail; |
1154 | if (ipv6_misc_proc_init()) |
1155 | goto proc_misc6_fail; |
1156 | if (if6_proc_init()) |
1157 | goto proc_if6_fail; |
1158 | #endif |
1159 | err = ip6_route_init(); |
1160 | if (err) |
1161 | goto ip6_route_fail; |
1162 | err = ndisc_late_init(); |
1163 | if (err) |
1164 | goto ndisc_late_fail; |
1165 | err = ip6_flowlabel_init(); |
1166 | if (err) |
1167 | goto ip6_flowlabel_fail; |
1168 | err = ipv6_anycast_init(); |
1169 | if (err) |
1170 | goto ipv6_anycast_fail; |
1171 | err = addrconf_init(); |
1172 | if (err) |
1173 | goto addrconf_fail; |
1174 | |
1175 | /* Init v6 extension headers. */ |
1176 | err = ipv6_exthdrs_init(); |
1177 | if (err) |
1178 | goto ipv6_exthdrs_fail; |
1179 | |
1180 | err = ipv6_frag_init(); |
1181 | if (err) |
1182 | goto ipv6_frag_fail; |
1183 | |
1184 | /* Init v6 transport protocols. */ |
1185 | err = udpv6_init(); |
1186 | if (err) |
1187 | goto udpv6_fail; |
1188 | |
1189 | err = udplitev6_init(); |
1190 | if (err) |
1191 | goto udplitev6_fail; |
1192 | |
1193 | err = udpv6_offload_init(); |
1194 | if (err) |
1195 | goto udpv6_offload_fail; |
1196 | |
1197 | err = tcpv6_init(); |
1198 | if (err) |
1199 | goto tcpv6_fail; |
1200 | |
1201 | err = ipv6_packet_init(); |
1202 | if (err) |
1203 | goto ipv6_packet_fail; |
1204 | |
1205 | err = pingv6_init(); |
1206 | if (err) |
1207 | goto pingv6_fail; |
1208 | |
1209 | err = calipso_init(); |
1210 | if (err) |
1211 | goto calipso_fail; |
1212 | |
1213 | err = seg6_init(); |
1214 | if (err) |
1215 | goto seg6_fail; |
1216 | |
1217 | err = rpl_init(); |
1218 | if (err) |
1219 | goto rpl_fail; |
1220 | |
1221 | err = ioam6_init(); |
1222 | if (err) |
1223 | goto ioam6_fail; |
1224 | |
1225 | err = igmp6_late_init(); |
1226 | if (err) |
1227 | goto igmp6_late_err; |
1228 | |
1229 | #ifdef CONFIG_SYSCTL |
1230 | err = ipv6_sysctl_register(); |
1231 | if (err) |
1232 | goto sysctl_fail; |
1233 | #endif |
1234 | |
1235 | /* ensure that ipv6 stubs are visible only after ipv6 is ready */ |
1236 | wmb(); |
1237 | ipv6_stub = &ipv6_stub_impl; |
1238 | ipv6_bpf_stub = &ipv6_bpf_stub_impl; |
1239 | out: |
1240 | return err; |
1241 | |
1242 | #ifdef CONFIG_SYSCTL |
1243 | sysctl_fail: |
1244 | igmp6_late_cleanup(); |
1245 | #endif |
1246 | igmp6_late_err: |
1247 | ioam6_exit(); |
1248 | ioam6_fail: |
1249 | rpl_exit(); |
1250 | rpl_fail: |
1251 | seg6_exit(); |
1252 | seg6_fail: |
1253 | calipso_exit(); |
1254 | calipso_fail: |
1255 | pingv6_exit(); |
1256 | pingv6_fail: |
1257 | ipv6_packet_cleanup(); |
1258 | ipv6_packet_fail: |
1259 | tcpv6_exit(); |
1260 | tcpv6_fail: |
1261 | udpv6_offload_exit(); |
1262 | udpv6_offload_fail: |
1263 | udplitev6_exit(); |
1264 | udplitev6_fail: |
1265 | udpv6_exit(); |
1266 | udpv6_fail: |
1267 | ipv6_frag_exit(); |
1268 | ipv6_frag_fail: |
1269 | ipv6_exthdrs_exit(); |
1270 | ipv6_exthdrs_fail: |
1271 | addrconf_cleanup(); |
1272 | addrconf_fail: |
1273 | ipv6_anycast_cleanup(); |
1274 | ipv6_anycast_fail: |
1275 | ip6_flowlabel_cleanup(); |
1276 | ip6_flowlabel_fail: |
1277 | ndisc_late_cleanup(); |
1278 | ndisc_late_fail: |
1279 | ip6_route_cleanup(); |
1280 | ip6_route_fail: |
1281 | #ifdef CONFIG_PROC_FS |
1282 | if6_proc_exit(); |
1283 | proc_if6_fail: |
1284 | ipv6_misc_proc_exit(); |
1285 | proc_misc6_fail: |
1286 | udplite6_proc_exit(); |
1287 | proc_udplite6_fail: |
1288 | raw6_proc_exit(); |
1289 | proc_raw6_fail: |
1290 | #endif |
1291 | ipv6_netfilter_fini(); |
1292 | netfilter_fail: |
1293 | igmp6_cleanup(); |
1294 | igmp_fail: |
1295 | ndisc_cleanup(); |
1296 | ndisc_fail: |
1297 | icmpv6_cleanup(); |
1298 | icmp_fail: |
1299 | ip6_mr_cleanup(); |
1300 | ipmr_fail: |
1301 | unregister_pernet_subsys(&inet6_net_ops); |
1302 | register_pernet_fail: |
1303 | sock_unregister(PF_INET6); |
1304 | rtnl_unregister_all(PF_INET6); |
1305 | out_sock_register_fail: |
1306 | rawv6_exit(); |
1307 | out_unregister_ping_proto: |
1308 | proto_unregister(prot: &pingv6_prot); |
1309 | out_unregister_raw_proto: |
1310 | proto_unregister(prot: &rawv6_prot); |
1311 | out_unregister_udplite_proto: |
1312 | proto_unregister(prot: &udplitev6_prot); |
1313 | out_unregister_udp_proto: |
1314 | proto_unregister(prot: &udpv6_prot); |
1315 | out_unregister_tcp_proto: |
1316 | proto_unregister(prot: &tcpv6_prot); |
1317 | goto out; |
1318 | } |
1319 | module_init(inet6_init); |
1320 | |
1321 | MODULE_ALIAS_NETPROTO(PF_INET6); |
1322 | |