1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * RAW sockets for IPv6 |
4 | * Linux INET6 implementation |
5 | * |
6 | * Authors: |
7 | * Pedro Roque <roque@di.fc.ul.pt> |
8 | * |
9 | * Adapted from linux/net/ipv4/raw.c |
10 | * |
11 | * Fixes: |
12 | * Hideaki YOSHIFUJI : sin6_scope_id support |
13 | * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance) |
14 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data |
15 | */ |
16 | |
17 | #include <linux/errno.h> |
18 | #include <linux/types.h> |
19 | #include <linux/socket.h> |
20 | #include <linux/slab.h> |
21 | #include <linux/sockios.h> |
22 | #include <linux/net.h> |
23 | #include <linux/in6.h> |
24 | #include <linux/netdevice.h> |
25 | #include <linux/if_arp.h> |
26 | #include <linux/icmpv6.h> |
27 | #include <linux/netfilter.h> |
28 | #include <linux/netfilter_ipv6.h> |
29 | #include <linux/skbuff.h> |
30 | #include <linux/compat.h> |
31 | #include <linux/uaccess.h> |
32 | #include <asm/ioctls.h> |
33 | |
34 | #include <net/net_namespace.h> |
35 | #include <net/ip.h> |
36 | #include <net/sock.h> |
37 | #include <net/snmp.h> |
38 | |
39 | #include <net/ipv6.h> |
40 | #include <net/ndisc.h> |
41 | #include <net/protocol.h> |
42 | #include <net/ip6_route.h> |
43 | #include <net/ip6_checksum.h> |
44 | #include <net/addrconf.h> |
45 | #include <net/transp_v6.h> |
46 | #include <net/udp.h> |
47 | #include <net/inet_common.h> |
48 | #include <net/tcp_states.h> |
49 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
50 | #include <net/mip6.h> |
51 | #endif |
52 | #include <linux/mroute6.h> |
53 | |
54 | #include <net/raw.h> |
55 | #include <net/rawv6.h> |
56 | #include <net/xfrm.h> |
57 | |
58 | #include <linux/proc_fs.h> |
59 | #include <linux/seq_file.h> |
60 | #include <linux/export.h> |
61 | |
62 | #define ICMPV6_HDRLEN 4 /* ICMPv6 header, RFC 4443 Section 2.1 */ |
63 | |
64 | struct raw_hashinfo raw_v6_hashinfo; |
65 | EXPORT_SYMBOL_GPL(raw_v6_hashinfo); |
66 | |
67 | bool raw_v6_match(struct net *net, const struct sock *sk, unsigned short num, |
68 | const struct in6_addr *loc_addr, |
69 | const struct in6_addr *rmt_addr, int dif, int sdif) |
70 | { |
71 | if (inet_sk(sk)->inet_num != num || |
72 | !net_eq(net1: sock_net(sk), net2: net) || |
73 | (!ipv6_addr_any(a: &sk->sk_v6_daddr) && |
74 | !ipv6_addr_equal(a1: &sk->sk_v6_daddr, a2: rmt_addr)) || |
75 | !raw_sk_bound_dev_eq(net, bound_dev_if: sk->sk_bound_dev_if, |
76 | dif, sdif)) |
77 | return false; |
78 | |
79 | if (ipv6_addr_any(a: &sk->sk_v6_rcv_saddr) || |
80 | ipv6_addr_equal(a1: &sk->sk_v6_rcv_saddr, a2: loc_addr) || |
81 | (ipv6_addr_is_multicast(addr: loc_addr) && |
82 | inet6_mc_check(sk, mc_addr: loc_addr, src_addr: rmt_addr))) |
83 | return true; |
84 | |
85 | return false; |
86 | } |
87 | EXPORT_SYMBOL_GPL(raw_v6_match); |
88 | |
89 | /* |
90 | * 0 - deliver |
91 | * 1 - block |
92 | */ |
93 | static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb) |
94 | { |
95 | struct icmp6hdr _hdr; |
96 | const struct icmp6hdr *hdr; |
97 | |
98 | /* We require only the four bytes of the ICMPv6 header, not any |
99 | * additional bytes of message body in "struct icmp6hdr". |
100 | */ |
101 | hdr = skb_header_pointer(skb, offset: skb_transport_offset(skb), |
102 | ICMPV6_HDRLEN, buffer: &_hdr); |
103 | if (hdr) { |
104 | const __u32 *data = &raw6_sk(sk)->filter.data[0]; |
105 | unsigned int type = hdr->icmp6_type; |
106 | |
107 | return (data[type >> 5] & (1U << (type & 31))) != 0; |
108 | } |
109 | return 1; |
110 | } |
111 | |
112 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
113 | typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb); |
114 | |
115 | static mh_filter_t __rcu *mh_filter __read_mostly; |
116 | |
117 | int rawv6_mh_filter_register(mh_filter_t filter) |
118 | { |
119 | rcu_assign_pointer(mh_filter, filter); |
120 | return 0; |
121 | } |
122 | EXPORT_SYMBOL(rawv6_mh_filter_register); |
123 | |
124 | int rawv6_mh_filter_unregister(mh_filter_t filter) |
125 | { |
126 | RCU_INIT_POINTER(mh_filter, NULL); |
127 | synchronize_rcu(); |
128 | return 0; |
129 | } |
130 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); |
131 | |
132 | #endif |
133 | |
134 | /* |
135 | * demultiplex raw sockets. |
136 | * (should consider queueing the skb in the sock receive_queue |
137 | * without calling rawv6.c) |
138 | * |
139 | * Caller owns SKB so we must make clones. |
140 | */ |
141 | static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
142 | { |
143 | struct net *net = dev_net(dev: skb->dev); |
144 | const struct in6_addr *saddr; |
145 | const struct in6_addr *daddr; |
146 | struct hlist_head *hlist; |
147 | struct sock *sk; |
148 | bool delivered = false; |
149 | __u8 hash; |
150 | |
151 | saddr = &ipv6_hdr(skb)->saddr; |
152 | daddr = saddr + 1; |
153 | |
154 | hash = raw_hashfunc(net, proto: nexthdr); |
155 | hlist = &raw_v6_hashinfo.ht[hash]; |
156 | rcu_read_lock(); |
157 | sk_for_each_rcu(sk, hlist) { |
158 | int filtered; |
159 | |
160 | if (!raw_v6_match(net, sk, nexthdr, daddr, saddr, |
161 | inet6_iif(skb), inet6_sdif(skb))) |
162 | continue; |
163 | delivered = true; |
164 | switch (nexthdr) { |
165 | case IPPROTO_ICMPV6: |
166 | filtered = icmpv6_filter(sk, skb); |
167 | break; |
168 | |
169 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
170 | case IPPROTO_MH: |
171 | { |
172 | /* XXX: To validate MH only once for each packet, |
173 | * this is placed here. It should be after checking |
174 | * xfrm policy, however it doesn't. The checking xfrm |
175 | * policy is placed in rawv6_rcv() because it is |
176 | * required for each socket. |
177 | */ |
178 | mh_filter_t *filter; |
179 | |
180 | filter = rcu_dereference(mh_filter); |
181 | filtered = filter ? (*filter)(sk, skb) : 0; |
182 | break; |
183 | } |
184 | #endif |
185 | default: |
186 | filtered = 0; |
187 | break; |
188 | } |
189 | |
190 | if (filtered < 0) |
191 | break; |
192 | if (filtered == 0) { |
193 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
194 | |
195 | /* Not releasing hash table! */ |
196 | if (clone) |
197 | rawv6_rcv(sk, skb: clone); |
198 | } |
199 | } |
200 | rcu_read_unlock(); |
201 | return delivered; |
202 | } |
203 | |
204 | bool raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
205 | { |
206 | return ipv6_raw_deliver(skb, nexthdr); |
207 | } |
208 | |
209 | /* This cleans up af_inet6 a bit. -DaveM */ |
210 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) |
211 | { |
212 | struct inet_sock *inet = inet_sk(sk); |
213 | struct ipv6_pinfo *np = inet6_sk(sk: sk); |
214 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; |
215 | __be32 v4addr = 0; |
216 | int addr_type; |
217 | int err; |
218 | |
219 | if (addr_len < SIN6_LEN_RFC2133) |
220 | return -EINVAL; |
221 | |
222 | if (addr->sin6_family != AF_INET6) |
223 | return -EINVAL; |
224 | |
225 | addr_type = ipv6_addr_type(addr: &addr->sin6_addr); |
226 | |
227 | /* Raw sockets are IPv6 only */ |
228 | if (addr_type == IPV6_ADDR_MAPPED) |
229 | return -EADDRNOTAVAIL; |
230 | |
231 | lock_sock(sk); |
232 | |
233 | err = -EINVAL; |
234 | if (sk->sk_state != TCP_CLOSE) |
235 | goto out; |
236 | |
237 | rcu_read_lock(); |
238 | /* Check if the address belongs to the host. */ |
239 | if (addr_type != IPV6_ADDR_ANY) { |
240 | struct net_device *dev = NULL; |
241 | |
242 | if (__ipv6_addr_needs_scope_id(type: addr_type)) { |
243 | if (addr_len >= sizeof(struct sockaddr_in6) && |
244 | addr->sin6_scope_id) { |
245 | /* Override any existing binding, if another |
246 | * one is supplied by user. |
247 | */ |
248 | sk->sk_bound_dev_if = addr->sin6_scope_id; |
249 | } |
250 | |
251 | /* Binding to link-local address requires an interface */ |
252 | if (!sk->sk_bound_dev_if) |
253 | goto out_unlock; |
254 | } |
255 | |
256 | if (sk->sk_bound_dev_if) { |
257 | err = -ENODEV; |
258 | dev = dev_get_by_index_rcu(net: sock_net(sk), |
259 | ifindex: sk->sk_bound_dev_if); |
260 | if (!dev) |
261 | goto out_unlock; |
262 | } |
263 | |
264 | /* ipv4 addr of the socket is invalid. Only the |
265 | * unspecified and mapped address have a v4 equivalent. |
266 | */ |
267 | v4addr = LOOPBACK4_IPV6; |
268 | if (!(addr_type & IPV6_ADDR_MULTICAST) && |
269 | !ipv6_can_nonlocal_bind(net: sock_net(sk), inet)) { |
270 | err = -EADDRNOTAVAIL; |
271 | if (!ipv6_chk_addr(net: sock_net(sk), addr: &addr->sin6_addr, |
272 | dev, strict: 0)) { |
273 | goto out_unlock; |
274 | } |
275 | } |
276 | } |
277 | |
278 | inet->inet_rcv_saddr = inet->inet_saddr = v4addr; |
279 | sk->sk_v6_rcv_saddr = addr->sin6_addr; |
280 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
281 | np->saddr = addr->sin6_addr; |
282 | err = 0; |
283 | out_unlock: |
284 | rcu_read_unlock(); |
285 | out: |
286 | release_sock(sk); |
287 | return err; |
288 | } |
289 | |
290 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
291 | struct inet6_skb_parm *opt, |
292 | u8 type, u8 code, int offset, __be32 info) |
293 | { |
294 | bool recverr = inet6_test_bit(RECVERR6, sk); |
295 | struct ipv6_pinfo *np = inet6_sk(sk: sk); |
296 | int err; |
297 | int harderr; |
298 | |
299 | /* Report error on raw socket, if: |
300 | 1. User requested recverr. |
301 | 2. Socket is connected (otherwise the error indication |
302 | is useless without recverr and error is hard. |
303 | */ |
304 | if (!recverr && sk->sk_state != TCP_ESTABLISHED) |
305 | return; |
306 | |
307 | harderr = icmpv6_err_convert(type, code, err: &err); |
308 | if (type == ICMPV6_PKT_TOOBIG) { |
309 | ip6_sk_update_pmtu(skb, sk, mtu: info); |
310 | harderr = (READ_ONCE(np->pmtudisc) == IPV6_PMTUDISC_DO); |
311 | } |
312 | if (type == NDISC_REDIRECT) { |
313 | ip6_sk_redirect(skb, sk); |
314 | return; |
315 | } |
316 | if (recverr) { |
317 | u8 *payload = skb->data; |
318 | if (!inet_test_bit(HDRINCL, sk)) |
319 | payload += offset; |
320 | ipv6_icmp_error(sk, skb, err, port: 0, ntohl(info), payload); |
321 | } |
322 | |
323 | if (recverr || harderr) { |
324 | sk->sk_err = err; |
325 | sk_error_report(sk); |
326 | } |
327 | } |
328 | |
329 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
330 | u8 type, u8 code, int inner_offset, __be32 info) |
331 | { |
332 | struct net *net = dev_net(dev: skb->dev); |
333 | struct hlist_head *hlist; |
334 | struct sock *sk; |
335 | int hash; |
336 | |
337 | hash = raw_hashfunc(net, proto: nexthdr); |
338 | hlist = &raw_v6_hashinfo.ht[hash]; |
339 | rcu_read_lock(); |
340 | sk_for_each_rcu(sk, hlist) { |
341 | /* Note: ipv6_hdr(skb) != skb->data */ |
342 | const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data; |
343 | |
344 | if (!raw_v6_match(net, sk, nexthdr, &ip6h->saddr, &ip6h->daddr, |
345 | inet6_iif(skb), inet6_iif(skb))) |
346 | continue; |
347 | rawv6_err(sk, skb, NULL, type, code, offset: inner_offset, info); |
348 | } |
349 | rcu_read_unlock(); |
350 | } |
351 | |
352 | static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb) |
353 | { |
354 | enum skb_drop_reason reason; |
355 | |
356 | if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) && |
357 | skb_checksum_complete(skb)) { |
358 | atomic_inc(v: &sk->sk_drops); |
359 | kfree_skb_reason(skb, reason: SKB_DROP_REASON_SKB_CSUM); |
360 | return NET_RX_DROP; |
361 | } |
362 | |
363 | /* Charge it to the socket. */ |
364 | skb_dst_drop(skb); |
365 | if (sock_queue_rcv_skb_reason(sk, skb, reason: &reason) < 0) { |
366 | kfree_skb_reason(skb, reason); |
367 | return NET_RX_DROP; |
368 | } |
369 | |
370 | return 0; |
371 | } |
372 | |
373 | /* |
374 | * This is next to useless... |
375 | * if we demultiplex in network layer we don't need the extra call |
376 | * just to queue the skb... |
377 | * maybe we could have the network decide upon a hint if it |
378 | * should call raw_rcv for demultiplexing |
379 | */ |
380 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) |
381 | { |
382 | struct inet_sock *inet = inet_sk(sk); |
383 | struct raw6_sock *rp = raw6_sk(sk); |
384 | |
385 | if (!xfrm6_policy_check(sk, dir: XFRM_POLICY_IN, skb)) { |
386 | atomic_inc(v: &sk->sk_drops); |
387 | kfree_skb_reason(skb, reason: SKB_DROP_REASON_XFRM_POLICY); |
388 | return NET_RX_DROP; |
389 | } |
390 | nf_reset_ct(skb); |
391 | |
392 | if (!rp->checksum) |
393 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
394 | |
395 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
396 | skb_postpull_rcsum(skb, start: skb_network_header(skb), |
397 | len: skb_network_header_len(skb)); |
398 | if (!csum_ipv6_magic(saddr: &ipv6_hdr(skb)->saddr, |
399 | daddr: &ipv6_hdr(skb)->daddr, |
400 | len: skb->len, proto: inet->inet_num, sum: skb->csum)) |
401 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
402 | } |
403 | if (!skb_csum_unnecessary(skb)) |
404 | skb->csum = ~csum_unfold(n: csum_ipv6_magic(saddr: &ipv6_hdr(skb)->saddr, |
405 | daddr: &ipv6_hdr(skb)->daddr, |
406 | len: skb->len, |
407 | proto: inet->inet_num, sum: 0)); |
408 | |
409 | if (inet_test_bit(HDRINCL, sk)) { |
410 | if (skb_checksum_complete(skb)) { |
411 | atomic_inc(v: &sk->sk_drops); |
412 | kfree_skb_reason(skb, reason: SKB_DROP_REASON_SKB_CSUM); |
413 | return NET_RX_DROP; |
414 | } |
415 | } |
416 | |
417 | rawv6_rcv_skb(sk, skb); |
418 | return 0; |
419 | } |
420 | |
421 | |
422 | /* |
423 | * This should be easy, if there is something there |
424 | * we return it, otherwise we block. |
425 | */ |
426 | |
427 | static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
428 | int flags, int *addr_len) |
429 | { |
430 | struct ipv6_pinfo *np = inet6_sk(sk: sk); |
431 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); |
432 | struct sk_buff *skb; |
433 | size_t copied; |
434 | int err; |
435 | |
436 | if (flags & MSG_OOB) |
437 | return -EOPNOTSUPP; |
438 | |
439 | if (flags & MSG_ERRQUEUE) |
440 | return ipv6_recv_error(sk, msg, len, addr_len); |
441 | |
442 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
443 | return ipv6_recv_rxpmtu(sk, msg, len, addr_len); |
444 | |
445 | skb = skb_recv_datagram(sk, flags, err: &err); |
446 | if (!skb) |
447 | goto out; |
448 | |
449 | copied = skb->len; |
450 | if (copied > len) { |
451 | copied = len; |
452 | msg->msg_flags |= MSG_TRUNC; |
453 | } |
454 | |
455 | if (skb_csum_unnecessary(skb)) { |
456 | err = skb_copy_datagram_msg(from: skb, offset: 0, msg, size: copied); |
457 | } else if (msg->msg_flags&MSG_TRUNC) { |
458 | if (__skb_checksum_complete(skb)) |
459 | goto csum_copy_err; |
460 | err = skb_copy_datagram_msg(from: skb, offset: 0, msg, size: copied); |
461 | } else { |
462 | err = skb_copy_and_csum_datagram_msg(skb, hlen: 0, msg); |
463 | if (err == -EINVAL) |
464 | goto csum_copy_err; |
465 | } |
466 | if (err) |
467 | goto out_free; |
468 | |
469 | /* Copy the address. */ |
470 | if (sin6) { |
471 | sin6->sin6_family = AF_INET6; |
472 | sin6->sin6_port = 0; |
473 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
474 | sin6->sin6_flowinfo = 0; |
475 | sin6->sin6_scope_id = ipv6_iface_scope_id(addr: &sin6->sin6_addr, |
476 | iface: inet6_iif(skb)); |
477 | *addr_len = sizeof(*sin6); |
478 | } |
479 | |
480 | sock_recv_cmsgs(msg, sk, skb); |
481 | |
482 | if (np->rxopt.all) |
483 | ip6_datagram_recv_ctl(sk, msg, skb); |
484 | |
485 | err = copied; |
486 | if (flags & MSG_TRUNC) |
487 | err = skb->len; |
488 | |
489 | out_free: |
490 | skb_free_datagram(sk, skb); |
491 | out: |
492 | return err; |
493 | |
494 | csum_copy_err: |
495 | skb_kill_datagram(sk, skb, flags); |
496 | |
497 | /* Error for blocking case is chosen to masquerade |
498 | as some normal condition. |
499 | */ |
500 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; |
501 | goto out; |
502 | } |
503 | |
504 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
505 | struct raw6_sock *rp) |
506 | { |
507 | struct ipv6_txoptions *opt; |
508 | struct sk_buff *skb; |
509 | int err = 0; |
510 | int offset; |
511 | int len; |
512 | int total_len; |
513 | __wsum tmp_csum; |
514 | __sum16 csum; |
515 | |
516 | if (!rp->checksum) |
517 | goto send; |
518 | |
519 | skb = skb_peek(list_: &sk->sk_write_queue); |
520 | if (!skb) |
521 | goto out; |
522 | |
523 | offset = rp->offset; |
524 | total_len = inet_sk(sk)->cork.base.length; |
525 | opt = inet6_sk(sk: sk)->cork.opt; |
526 | total_len -= opt ? opt->opt_flen : 0; |
527 | |
528 | if (offset >= total_len - 1) { |
529 | err = -EINVAL; |
530 | ip6_flush_pending_frames(sk); |
531 | goto out; |
532 | } |
533 | |
534 | /* should be check HW csum miyazawa */ |
535 | if (skb_queue_len(list_: &sk->sk_write_queue) == 1) { |
536 | /* |
537 | * Only one fragment on the socket. |
538 | */ |
539 | tmp_csum = skb->csum; |
540 | } else { |
541 | struct sk_buff *csum_skb = NULL; |
542 | tmp_csum = 0; |
543 | |
544 | skb_queue_walk(&sk->sk_write_queue, skb) { |
545 | tmp_csum = csum_add(csum: tmp_csum, addend: skb->csum); |
546 | |
547 | if (csum_skb) |
548 | continue; |
549 | |
550 | len = skb->len - skb_transport_offset(skb); |
551 | if (offset >= len) { |
552 | offset -= len; |
553 | continue; |
554 | } |
555 | |
556 | csum_skb = skb; |
557 | } |
558 | |
559 | skb = csum_skb; |
560 | } |
561 | |
562 | offset += skb_transport_offset(skb); |
563 | err = skb_copy_bits(skb, offset, to: &csum, len: 2); |
564 | if (err < 0) { |
565 | ip6_flush_pending_frames(sk); |
566 | goto out; |
567 | } |
568 | |
569 | /* in case cksum was not initialized */ |
570 | if (unlikely(csum)) |
571 | tmp_csum = csum_sub(csum: tmp_csum, addend: csum_unfold(n: csum)); |
572 | |
573 | csum = csum_ipv6_magic(saddr: &fl6->saddr, daddr: &fl6->daddr, |
574 | len: total_len, proto: fl6->flowi6_proto, sum: tmp_csum); |
575 | |
576 | if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP) |
577 | csum = CSUM_MANGLED_0; |
578 | |
579 | BUG_ON(skb_store_bits(skb, offset, &csum, 2)); |
580 | |
581 | send: |
582 | err = ip6_push_pending_frames(sk); |
583 | out: |
584 | return err; |
585 | } |
586 | |
587 | static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length, |
588 | struct flowi6 *fl6, struct dst_entry **dstp, |
589 | unsigned int flags, const struct sockcm_cookie *sockc) |
590 | { |
591 | struct net *net = sock_net(sk); |
592 | struct ipv6hdr *iph; |
593 | struct sk_buff *skb; |
594 | int err; |
595 | struct rt6_info *rt = (struct rt6_info *)*dstp; |
596 | int hlen = LL_RESERVED_SPACE(rt->dst.dev); |
597 | int tlen = rt->dst.dev->needed_tailroom; |
598 | |
599 | if (length > rt->dst.dev->mtu) { |
600 | ipv6_local_error(sk, EMSGSIZE, fl6, info: rt->dst.dev->mtu); |
601 | return -EMSGSIZE; |
602 | } |
603 | if (length < sizeof(struct ipv6hdr)) |
604 | return -EINVAL; |
605 | if (flags&MSG_PROBE) |
606 | goto out; |
607 | |
608 | skb = sock_alloc_send_skb(sk, |
609 | size: length + hlen + tlen + 15, |
610 | noblock: flags & MSG_DONTWAIT, errcode: &err); |
611 | if (!skb) |
612 | goto error; |
613 | skb_reserve(skb, len: hlen); |
614 | |
615 | skb->protocol = htons(ETH_P_IPV6); |
616 | skb->priority = READ_ONCE(sk->sk_priority); |
617 | skb->mark = sockc->mark; |
618 | skb->tstamp = sockc->transmit_time; |
619 | |
620 | skb_put(skb, len: length); |
621 | skb_reset_network_header(skb); |
622 | iph = ipv6_hdr(skb); |
623 | |
624 | skb->ip_summed = CHECKSUM_NONE; |
625 | |
626 | skb_setup_tx_timestamp(skb, tsflags: sockc->tsflags); |
627 | |
628 | if (flags & MSG_CONFIRM) |
629 | skb_set_dst_pending_confirm(skb, val: 1); |
630 | |
631 | skb->transport_header = skb->network_header; |
632 | err = memcpy_from_msg(data: iph, msg, len: length); |
633 | if (err) { |
634 | err = -EFAULT; |
635 | kfree_skb(skb); |
636 | goto error; |
637 | } |
638 | |
639 | skb_dst_set(skb, dst: &rt->dst); |
640 | *dstp = NULL; |
641 | |
642 | /* if egress device is enslaved to an L3 master device pass the |
643 | * skb to its handler for processing |
644 | */ |
645 | skb = l3mdev_ip6_out(sk, skb); |
646 | if (unlikely(!skb)) |
647 | return 0; |
648 | |
649 | /* Acquire rcu_read_lock() in case we need to use rt->rt6i_idev |
650 | * in the error path. Since skb has been freed, the dst could |
651 | * have been queued for deletion. |
652 | */ |
653 | rcu_read_lock(); |
654 | IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); |
655 | err = NF_HOOK(pf: NFPROTO_IPV6, hook: NF_INET_LOCAL_OUT, net, sk, skb, |
656 | NULL, out: rt->dst.dev, okfn: dst_output); |
657 | if (err > 0) |
658 | err = net_xmit_errno(err); |
659 | if (err) { |
660 | IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
661 | rcu_read_unlock(); |
662 | goto error_check; |
663 | } |
664 | rcu_read_unlock(); |
665 | out: |
666 | return 0; |
667 | |
668 | error: |
669 | IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
670 | error_check: |
671 | if (err == -ENOBUFS && !inet6_test_bit(RECVERR6, sk)) |
672 | err = 0; |
673 | return err; |
674 | } |
675 | |
676 | struct raw6_frag_vec { |
677 | struct msghdr *msg; |
678 | int hlen; |
679 | char c[4]; |
680 | }; |
681 | |
682 | static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6) |
683 | { |
684 | int err = 0; |
685 | switch (fl6->flowi6_proto) { |
686 | case IPPROTO_ICMPV6: |
687 | rfv->hlen = 2; |
688 | err = memcpy_from_msg(data: rfv->c, msg: rfv->msg, len: rfv->hlen); |
689 | if (!err) { |
690 | fl6->fl6_icmp_type = rfv->c[0]; |
691 | fl6->fl6_icmp_code = rfv->c[1]; |
692 | } |
693 | break; |
694 | case IPPROTO_MH: |
695 | rfv->hlen = 4; |
696 | err = memcpy_from_msg(data: rfv->c, msg: rfv->msg, len: rfv->hlen); |
697 | if (!err) |
698 | fl6->fl6_mh_type = rfv->c[2]; |
699 | } |
700 | return err; |
701 | } |
702 | |
703 | static int raw6_getfrag(void *from, char *to, int offset, int len, int odd, |
704 | struct sk_buff *skb) |
705 | { |
706 | struct raw6_frag_vec *rfv = from; |
707 | |
708 | if (offset < rfv->hlen) { |
709 | int copy = min(rfv->hlen - offset, len); |
710 | |
711 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
712 | memcpy(to, rfv->c + offset, copy); |
713 | else |
714 | skb->csum = csum_block_add( |
715 | csum: skb->csum, |
716 | csum2: csum_partial_copy_nocheck(src: rfv->c + offset, |
717 | dst: to, len: copy), |
718 | offset: odd); |
719 | |
720 | odd = 0; |
721 | offset += copy; |
722 | to += copy; |
723 | len -= copy; |
724 | |
725 | if (!len) |
726 | return 0; |
727 | } |
728 | |
729 | offset -= rfv->hlen; |
730 | |
731 | return ip_generic_getfrag(from: rfv->msg, to, offset, len, odd, skb); |
732 | } |
733 | |
734 | static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) |
735 | { |
736 | struct ipv6_txoptions *opt_to_free = NULL; |
737 | struct ipv6_txoptions opt_space; |
738 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); |
739 | struct in6_addr *daddr, *final_p, final; |
740 | struct inet_sock *inet = inet_sk(sk); |
741 | struct ipv6_pinfo *np = inet6_sk(sk: sk); |
742 | struct raw6_sock *rp = raw6_sk(sk); |
743 | struct ipv6_txoptions *opt = NULL; |
744 | struct ip6_flowlabel *flowlabel = NULL; |
745 | struct dst_entry *dst = NULL; |
746 | struct raw6_frag_vec rfv; |
747 | struct flowi6 fl6; |
748 | struct ipcm6_cookie ipc6; |
749 | int addr_len = msg->msg_namelen; |
750 | int hdrincl; |
751 | u16 proto; |
752 | int err; |
753 | |
754 | /* Rough check on arithmetic overflow, |
755 | better check is made in ip6_append_data(). |
756 | */ |
757 | if (len > INT_MAX) |
758 | return -EMSGSIZE; |
759 | |
760 | /* Mirror BSD error message compatibility */ |
761 | if (msg->msg_flags & MSG_OOB) |
762 | return -EOPNOTSUPP; |
763 | |
764 | hdrincl = inet_test_bit(HDRINCL, sk); |
765 | |
766 | /* |
767 | * Get and verify the address. |
768 | */ |
769 | memset(&fl6, 0, sizeof(fl6)); |
770 | |
771 | fl6.flowi6_mark = READ_ONCE(sk->sk_mark); |
772 | fl6.flowi6_uid = sk->sk_uid; |
773 | |
774 | ipcm6_init(ipc6: &ipc6); |
775 | ipc6.sockc.tsflags = READ_ONCE(sk->sk_tsflags); |
776 | ipc6.sockc.mark = fl6.flowi6_mark; |
777 | |
778 | if (sin6) { |
779 | if (addr_len < SIN6_LEN_RFC2133) |
780 | return -EINVAL; |
781 | |
782 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
783 | return -EAFNOSUPPORT; |
784 | |
785 | /* port is the proto value [0..255] carried in nexthdr */ |
786 | proto = ntohs(sin6->sin6_port); |
787 | |
788 | if (!proto) |
789 | proto = inet->inet_num; |
790 | else if (proto != inet->inet_num && |
791 | inet->inet_num != IPPROTO_RAW) |
792 | return -EINVAL; |
793 | |
794 | if (proto > 255) |
795 | return -EINVAL; |
796 | |
797 | daddr = &sin6->sin6_addr; |
798 | if (inet6_test_bit(SNDFLOW, sk)) { |
799 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
800 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { |
801 | flowlabel = fl6_sock_lookup(sk, label: fl6.flowlabel); |
802 | if (IS_ERR(ptr: flowlabel)) |
803 | return -EINVAL; |
804 | } |
805 | } |
806 | |
807 | /* |
808 | * Otherwise it will be difficult to maintain |
809 | * sk->sk_dst_cache. |
810 | */ |
811 | if (sk->sk_state == TCP_ESTABLISHED && |
812 | ipv6_addr_equal(a1: daddr, a2: &sk->sk_v6_daddr)) |
813 | daddr = &sk->sk_v6_daddr; |
814 | |
815 | if (addr_len >= sizeof(struct sockaddr_in6) && |
816 | sin6->sin6_scope_id && |
817 | __ipv6_addr_needs_scope_id(type: __ipv6_addr_type(addr: daddr))) |
818 | fl6.flowi6_oif = sin6->sin6_scope_id; |
819 | } else { |
820 | if (sk->sk_state != TCP_ESTABLISHED) |
821 | return -EDESTADDRREQ; |
822 | |
823 | proto = inet->inet_num; |
824 | daddr = &sk->sk_v6_daddr; |
825 | fl6.flowlabel = np->flow_label; |
826 | } |
827 | |
828 | if (fl6.flowi6_oif == 0) |
829 | fl6.flowi6_oif = sk->sk_bound_dev_if; |
830 | |
831 | if (msg->msg_controllen) { |
832 | opt = &opt_space; |
833 | memset(opt, 0, sizeof(struct ipv6_txoptions)); |
834 | opt->tot_len = sizeof(struct ipv6_txoptions); |
835 | ipc6.opt = opt; |
836 | |
837 | err = ip6_datagram_send_ctl(net: sock_net(sk), sk, msg, fl6: &fl6, ipc6: &ipc6); |
838 | if (err < 0) { |
839 | fl6_sock_release(fl: flowlabel); |
840 | return err; |
841 | } |
842 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
843 | flowlabel = fl6_sock_lookup(sk, label: fl6.flowlabel); |
844 | if (IS_ERR(ptr: flowlabel)) |
845 | return -EINVAL; |
846 | } |
847 | if (!(opt->opt_nflen|opt->opt_flen)) |
848 | opt = NULL; |
849 | } |
850 | if (!opt) { |
851 | opt = txopt_get(np); |
852 | opt_to_free = opt; |
853 | } |
854 | if (flowlabel) |
855 | opt = fl6_merge_options(opt_space: &opt_space, fl: flowlabel, fopt: opt); |
856 | opt = ipv6_fixup_options(opt_space: &opt_space, opt); |
857 | |
858 | fl6.flowi6_proto = proto; |
859 | fl6.flowi6_mark = ipc6.sockc.mark; |
860 | |
861 | if (!hdrincl) { |
862 | rfv.msg = msg; |
863 | rfv.hlen = 0; |
864 | err = rawv6_probe_proto_opt(rfv: &rfv, fl6: &fl6); |
865 | if (err) |
866 | goto out; |
867 | } |
868 | |
869 | if (!ipv6_addr_any(a: daddr)) |
870 | fl6.daddr = *daddr; |
871 | else |
872 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
873 | if (ipv6_addr_any(a: &fl6.saddr) && !ipv6_addr_any(a: &np->saddr)) |
874 | fl6.saddr = np->saddr; |
875 | |
876 | final_p = fl6_update_dst(fl6: &fl6, opt, orig: &final); |
877 | |
878 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(addr: &fl6.daddr)) |
879 | fl6.flowi6_oif = np->mcast_oif; |
880 | else if (!fl6.flowi6_oif) |
881 | fl6.flowi6_oif = np->ucast_oif; |
882 | security_sk_classify_flow(sk, flic: flowi6_to_flowi_common(fl6: &fl6)); |
883 | |
884 | if (hdrincl) |
885 | fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH; |
886 | |
887 | if (ipc6.tclass < 0) |
888 | ipc6.tclass = np->tclass; |
889 | |
890 | fl6.flowlabel = ip6_make_flowinfo(tclass: ipc6.tclass, flowlabel: fl6.flowlabel); |
891 | |
892 | dst = ip6_dst_lookup_flow(net: sock_net(sk), sk, fl6: &fl6, final_dst: final_p); |
893 | if (IS_ERR(ptr: dst)) { |
894 | err = PTR_ERR(ptr: dst); |
895 | goto out; |
896 | } |
897 | if (ipc6.hlimit < 0) |
898 | ipc6.hlimit = ip6_sk_dst_hoplimit(np, fl6: &fl6, dst); |
899 | |
900 | if (ipc6.dontfrag < 0) |
901 | ipc6.dontfrag = inet6_test_bit(DONTFRAG, sk); |
902 | |
903 | if (msg->msg_flags&MSG_CONFIRM) |
904 | goto do_confirm; |
905 | |
906 | back_from_confirm: |
907 | if (hdrincl) |
908 | err = rawv6_send_hdrinc(sk, msg, length: len, fl6: &fl6, dstp: &dst, |
909 | flags: msg->msg_flags, sockc: &ipc6.sockc); |
910 | else { |
911 | ipc6.opt = opt; |
912 | lock_sock(sk); |
913 | err = ip6_append_data(sk, getfrag: raw6_getfrag, from: &rfv, |
914 | length: len, transhdrlen: 0, ipc6: &ipc6, fl6: &fl6, rt: (struct rt6_info *)dst, |
915 | flags: msg->msg_flags); |
916 | |
917 | if (err) |
918 | ip6_flush_pending_frames(sk); |
919 | else if (!(msg->msg_flags & MSG_MORE)) |
920 | err = rawv6_push_pending_frames(sk, fl6: &fl6, rp); |
921 | release_sock(sk); |
922 | } |
923 | done: |
924 | dst_release(dst); |
925 | out: |
926 | fl6_sock_release(fl: flowlabel); |
927 | txopt_put(opt: opt_to_free); |
928 | return err < 0 ? err : len; |
929 | do_confirm: |
930 | if (msg->msg_flags & MSG_PROBE) |
931 | dst_confirm_neigh(dst, daddr: &fl6.daddr); |
932 | if (!(msg->msg_flags & MSG_PROBE) || len) |
933 | goto back_from_confirm; |
934 | err = 0; |
935 | goto done; |
936 | } |
937 | |
938 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
939 | sockptr_t optval, int optlen) |
940 | { |
941 | switch (optname) { |
942 | case ICMPV6_FILTER: |
943 | if (optlen > sizeof(struct icmp6_filter)) |
944 | optlen = sizeof(struct icmp6_filter); |
945 | if (copy_from_sockptr(dst: &raw6_sk(sk)->filter, src: optval, size: optlen)) |
946 | return -EFAULT; |
947 | return 0; |
948 | default: |
949 | return -ENOPROTOOPT; |
950 | } |
951 | |
952 | return 0; |
953 | } |
954 | |
955 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
956 | char __user *optval, int __user *optlen) |
957 | { |
958 | int len; |
959 | |
960 | switch (optname) { |
961 | case ICMPV6_FILTER: |
962 | if (get_user(len, optlen)) |
963 | return -EFAULT; |
964 | if (len < 0) |
965 | return -EINVAL; |
966 | if (len > sizeof(struct icmp6_filter)) |
967 | len = sizeof(struct icmp6_filter); |
968 | if (put_user(len, optlen)) |
969 | return -EFAULT; |
970 | if (copy_to_user(to: optval, from: &raw6_sk(sk)->filter, n: len)) |
971 | return -EFAULT; |
972 | return 0; |
973 | default: |
974 | return -ENOPROTOOPT; |
975 | } |
976 | |
977 | return 0; |
978 | } |
979 | |
980 | |
981 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
982 | sockptr_t optval, unsigned int optlen) |
983 | { |
984 | struct raw6_sock *rp = raw6_sk(sk); |
985 | int val; |
986 | |
987 | if (optlen < sizeof(val)) |
988 | return -EINVAL; |
989 | |
990 | if (copy_from_sockptr(dst: &val, src: optval, size: sizeof(val))) |
991 | return -EFAULT; |
992 | |
993 | switch (optname) { |
994 | case IPV6_HDRINCL: |
995 | if (sk->sk_type != SOCK_RAW) |
996 | return -EINVAL; |
997 | inet_assign_bit(HDRINCL, sk, val); |
998 | return 0; |
999 | case IPV6_CHECKSUM: |
1000 | if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 && |
1001 | level == IPPROTO_IPV6) { |
1002 | /* |
1003 | * RFC3542 tells that IPV6_CHECKSUM socket |
1004 | * option in the IPPROTO_IPV6 level is not |
1005 | * allowed on ICMPv6 sockets. |
1006 | * If you want to set it, use IPPROTO_RAW |
1007 | * level IPV6_CHECKSUM socket option |
1008 | * (Linux extension). |
1009 | */ |
1010 | return -EINVAL; |
1011 | } |
1012 | |
1013 | /* You may get strange result with a positive odd offset; |
1014 | RFC2292bis agrees with me. */ |
1015 | if (val > 0 && (val&1)) |
1016 | return -EINVAL; |
1017 | if (val < 0) { |
1018 | rp->checksum = 0; |
1019 | } else { |
1020 | rp->checksum = 1; |
1021 | rp->offset = val; |
1022 | } |
1023 | |
1024 | return 0; |
1025 | |
1026 | default: |
1027 | return -ENOPROTOOPT; |
1028 | } |
1029 | } |
1030 | |
1031 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
1032 | sockptr_t optval, unsigned int optlen) |
1033 | { |
1034 | switch (level) { |
1035 | case SOL_RAW: |
1036 | break; |
1037 | |
1038 | case SOL_ICMPV6: |
1039 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
1040 | return -EOPNOTSUPP; |
1041 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); |
1042 | case SOL_IPV6: |
1043 | if (optname == IPV6_CHECKSUM || |
1044 | optname == IPV6_HDRINCL) |
1045 | break; |
1046 | fallthrough; |
1047 | default: |
1048 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
1049 | } |
1050 | |
1051 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1052 | } |
1053 | |
1054 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, |
1055 | char __user *optval, int __user *optlen) |
1056 | { |
1057 | struct raw6_sock *rp = raw6_sk(sk); |
1058 | int val, len; |
1059 | |
1060 | if (get_user(len, optlen)) |
1061 | return -EFAULT; |
1062 | |
1063 | switch (optname) { |
1064 | case IPV6_HDRINCL: |
1065 | val = inet_test_bit(HDRINCL, sk); |
1066 | break; |
1067 | case IPV6_CHECKSUM: |
1068 | /* |
1069 | * We allow getsockopt() for IPPROTO_IPV6-level |
1070 | * IPV6_CHECKSUM socket option on ICMPv6 sockets |
1071 | * since RFC3542 is silent about it. |
1072 | */ |
1073 | if (rp->checksum == 0) |
1074 | val = -1; |
1075 | else |
1076 | val = rp->offset; |
1077 | break; |
1078 | |
1079 | default: |
1080 | return -ENOPROTOOPT; |
1081 | } |
1082 | |
1083 | len = min_t(unsigned int, sizeof(int), len); |
1084 | |
1085 | if (put_user(len, optlen)) |
1086 | return -EFAULT; |
1087 | if (copy_to_user(to: optval, from: &val, n: len)) |
1088 | return -EFAULT; |
1089 | return 0; |
1090 | } |
1091 | |
1092 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1093 | char __user *optval, int __user *optlen) |
1094 | { |
1095 | switch (level) { |
1096 | case SOL_RAW: |
1097 | break; |
1098 | |
1099 | case SOL_ICMPV6: |
1100 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
1101 | return -EOPNOTSUPP; |
1102 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); |
1103 | case SOL_IPV6: |
1104 | if (optname == IPV6_CHECKSUM || |
1105 | optname == IPV6_HDRINCL) |
1106 | break; |
1107 | fallthrough; |
1108 | default: |
1109 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
1110 | } |
1111 | |
1112 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1113 | } |
1114 | |
1115 | static int rawv6_ioctl(struct sock *sk, int cmd, int *karg) |
1116 | { |
1117 | switch (cmd) { |
1118 | case SIOCOUTQ: { |
1119 | *karg = sk_wmem_alloc_get(sk); |
1120 | return 0; |
1121 | } |
1122 | case SIOCINQ: { |
1123 | struct sk_buff *skb; |
1124 | |
1125 | spin_lock_bh(lock: &sk->sk_receive_queue.lock); |
1126 | skb = skb_peek(list_: &sk->sk_receive_queue); |
1127 | if (skb) |
1128 | *karg = skb->len; |
1129 | else |
1130 | *karg = 0; |
1131 | spin_unlock_bh(lock: &sk->sk_receive_queue.lock); |
1132 | return 0; |
1133 | } |
1134 | |
1135 | default: |
1136 | #ifdef CONFIG_IPV6_MROUTE |
1137 | return ip6mr_ioctl(sk, cmd, arg: karg); |
1138 | #else |
1139 | return -ENOIOCTLCMD; |
1140 | #endif |
1141 | } |
1142 | } |
1143 | |
1144 | #ifdef CONFIG_COMPAT |
1145 | static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) |
1146 | { |
1147 | switch (cmd) { |
1148 | case SIOCOUTQ: |
1149 | case SIOCINQ: |
1150 | return -ENOIOCTLCMD; |
1151 | default: |
1152 | #ifdef CONFIG_IPV6_MROUTE |
1153 | return ip6mr_compat_ioctl(sk, cmd, arg: compat_ptr(uptr: arg)); |
1154 | #else |
1155 | return -ENOIOCTLCMD; |
1156 | #endif |
1157 | } |
1158 | } |
1159 | #endif |
1160 | |
1161 | static void rawv6_close(struct sock *sk, long timeout) |
1162 | { |
1163 | if (inet_sk(sk)->inet_num == IPPROTO_RAW) |
1164 | ip6_ra_control(sk, sel: -1); |
1165 | ip6mr_sk_done(sk); |
1166 | sk_common_release(sk); |
1167 | } |
1168 | |
1169 | static void raw6_destroy(struct sock *sk) |
1170 | { |
1171 | lock_sock(sk); |
1172 | ip6_flush_pending_frames(sk); |
1173 | release_sock(sk); |
1174 | } |
1175 | |
1176 | static int rawv6_init_sk(struct sock *sk) |
1177 | { |
1178 | struct raw6_sock *rp = raw6_sk(sk); |
1179 | |
1180 | switch (inet_sk(sk)->inet_num) { |
1181 | case IPPROTO_ICMPV6: |
1182 | rp->checksum = 1; |
1183 | rp->offset = 2; |
1184 | break; |
1185 | case IPPROTO_MH: |
1186 | rp->checksum = 1; |
1187 | rp->offset = 4; |
1188 | break; |
1189 | default: |
1190 | break; |
1191 | } |
1192 | return 0; |
1193 | } |
1194 | |
1195 | struct proto rawv6_prot = { |
1196 | .name = "RAWv6" , |
1197 | .owner = THIS_MODULE, |
1198 | .close = rawv6_close, |
1199 | .destroy = raw6_destroy, |
1200 | .connect = ip6_datagram_connect_v6_only, |
1201 | .disconnect = __udp_disconnect, |
1202 | .ioctl = rawv6_ioctl, |
1203 | .init = rawv6_init_sk, |
1204 | .setsockopt = rawv6_setsockopt, |
1205 | .getsockopt = rawv6_getsockopt, |
1206 | .sendmsg = rawv6_sendmsg, |
1207 | .recvmsg = rawv6_recvmsg, |
1208 | .bind = rawv6_bind, |
1209 | .backlog_rcv = rawv6_rcv_skb, |
1210 | .hash = raw_hash_sk, |
1211 | .unhash = raw_unhash_sk, |
1212 | .obj_size = sizeof(struct raw6_sock), |
1213 | .ipv6_pinfo_offset = offsetof(struct raw6_sock, inet6), |
1214 | .useroffset = offsetof(struct raw6_sock, filter), |
1215 | .usersize = sizeof_field(struct raw6_sock, filter), |
1216 | .h.raw_hash = &raw_v6_hashinfo, |
1217 | #ifdef CONFIG_COMPAT |
1218 | .compat_ioctl = compat_rawv6_ioctl, |
1219 | #endif |
1220 | .diag_destroy = raw_abort, |
1221 | }; |
1222 | |
1223 | #ifdef CONFIG_PROC_FS |
1224 | static int raw6_seq_show(struct seq_file *seq, void *v) |
1225 | { |
1226 | if (v == SEQ_START_TOKEN) { |
1227 | seq_puts(m: seq, IPV6_SEQ_DGRAM_HEADER); |
1228 | } else { |
1229 | struct sock *sp = v; |
1230 | __u16 srcp = inet_sk(sp)->inet_num; |
1231 | ip6_dgram_sock_seq_show(seq, sp: v, srcp, destp: 0, |
1232 | bucket: raw_seq_private(seq)->bucket); |
1233 | } |
1234 | return 0; |
1235 | } |
1236 | |
1237 | static const struct seq_operations raw6_seq_ops = { |
1238 | .start = raw_seq_start, |
1239 | .next = raw_seq_next, |
1240 | .stop = raw_seq_stop, |
1241 | .show = raw6_seq_show, |
1242 | }; |
1243 | |
1244 | static int __net_init raw6_init_net(struct net *net) |
1245 | { |
1246 | if (!proc_create_net_data(name: "raw6" , mode: 0444, parent: net->proc_net, ops: &raw6_seq_ops, |
1247 | state_size: sizeof(struct raw_iter_state), data: &raw_v6_hashinfo)) |
1248 | return -ENOMEM; |
1249 | |
1250 | return 0; |
1251 | } |
1252 | |
1253 | static void __net_exit raw6_exit_net(struct net *net) |
1254 | { |
1255 | remove_proc_entry("raw6" , net->proc_net); |
1256 | } |
1257 | |
1258 | static struct pernet_operations raw6_net_ops = { |
1259 | .init = raw6_init_net, |
1260 | .exit = raw6_exit_net, |
1261 | }; |
1262 | |
1263 | int __init raw6_proc_init(void) |
1264 | { |
1265 | return register_pernet_subsys(&raw6_net_ops); |
1266 | } |
1267 | |
1268 | void raw6_proc_exit(void) |
1269 | { |
1270 | unregister_pernet_subsys(&raw6_net_ops); |
1271 | } |
1272 | #endif /* CONFIG_PROC_FS */ |
1273 | |
1274 | /* Same as inet6_dgram_ops, sans udp_poll. */ |
1275 | const struct proto_ops inet6_sockraw_ops = { |
1276 | .family = PF_INET6, |
1277 | .owner = THIS_MODULE, |
1278 | .release = inet6_release, |
1279 | .bind = inet6_bind, |
1280 | .connect = inet_dgram_connect, /* ok */ |
1281 | .socketpair = sock_no_socketpair, /* a do nothing */ |
1282 | .accept = sock_no_accept, /* a do nothing */ |
1283 | .getname = inet6_getname, |
1284 | .poll = datagram_poll, /* ok */ |
1285 | .ioctl = inet6_ioctl, /* must change */ |
1286 | .gettstamp = sock_gettstamp, |
1287 | .listen = sock_no_listen, /* ok */ |
1288 | .shutdown = inet_shutdown, /* ok */ |
1289 | .setsockopt = sock_common_setsockopt, /* ok */ |
1290 | .getsockopt = sock_common_getsockopt, /* ok */ |
1291 | .sendmsg = inet_sendmsg, /* ok */ |
1292 | .recvmsg = sock_common_recvmsg, /* ok */ |
1293 | .mmap = sock_no_mmap, |
1294 | #ifdef CONFIG_COMPAT |
1295 | .compat_ioctl = inet6_compat_ioctl, |
1296 | #endif |
1297 | }; |
1298 | |
1299 | static struct inet_protosw rawv6_protosw = { |
1300 | .type = SOCK_RAW, |
1301 | .protocol = IPPROTO_IP, /* wild card */ |
1302 | .prot = &rawv6_prot, |
1303 | .ops = &inet6_sockraw_ops, |
1304 | .flags = INET_PROTOSW_REUSE, |
1305 | }; |
1306 | |
1307 | int __init rawv6_init(void) |
1308 | { |
1309 | return inet6_register_protosw(p: &rawv6_protosw); |
1310 | } |
1311 | |
1312 | void rawv6_exit(void) |
1313 | { |
1314 | inet6_unregister_protosw(p: &rawv6_protosw); |
1315 | } |
1316 | |