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Commit | Line | Data |
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1 | /* | |
2 | * RAW sockets for IPv6 | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
7 | * | |
8 | * Adapted from linux/net/ipv4/raw.c | |
9 | * | |
10 | * Fixes: | |
11 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
12 | * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance) | |
13 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data | |
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 | #include <linux/errno.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/socket.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sockios.h> | |
26 | #include <linux/net.h> | |
27 | #include <linux/in6.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/if_arp.h> | |
30 | #include <linux/icmpv6.h> | |
31 | #include <linux/netfilter.h> | |
32 | #include <linux/netfilter_ipv6.h> | |
33 | #include <linux/skbuff.h> | |
34 | #include <linux/compat.h> | |
35 | #include <linux/uaccess.h> | |
36 | #include <asm/ioctls.h> | |
37 | ||
38 | #include <net/net_namespace.h> | |
39 | #include <net/ip.h> | |
40 | #include <net/sock.h> | |
41 | #include <net/snmp.h> | |
42 | ||
43 | #include <net/ipv6.h> | |
44 | #include <net/ndisc.h> | |
45 | #include <net/protocol.h> | |
46 | #include <net/ip6_route.h> | |
47 | #include <net/ip6_checksum.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/transp_v6.h> | |
50 | #include <net/udp.h> | |
51 | #include <net/inet_common.h> | |
52 | #include <net/tcp_states.h> | |
53 | #if IS_ENABLED(CONFIG_IPV6_MIP6) | |
54 | #include <net/mip6.h> | |
55 | #endif | |
56 | #include <linux/mroute6.h> | |
57 | ||
58 | #include <net/raw.h> | |
59 | #include <net/rawv6.h> | |
60 | #include <net/xfrm.h> | |
61 | ||
62 | #include <linux/proc_fs.h> | |
63 | #include <linux/seq_file.h> | |
64 | #include <linux/export.h> | |
65 | ||
66 | #define ICMPV6_HDRLEN 4 /* ICMPv6 header, RFC 4443 Section 2.1 */ | |
67 | ||
68 | static struct raw_hashinfo raw_v6_hashinfo = { | |
69 | .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), | |
70 | }; | |
71 | ||
72 | static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, | |
73 | unsigned short num, const struct in6_addr *loc_addr, | |
74 | const struct in6_addr *rmt_addr, int dif) | |
75 | { | |
76 | bool is_multicast = ipv6_addr_is_multicast(loc_addr); | |
77 | ||
78 | sk_for_each_from(sk) | |
79 | if (inet_sk(sk)->inet_num == num) { | |
80 | ||
81 | if (!net_eq(sock_net(sk), net)) | |
82 | continue; | |
83 | ||
84 | if (!ipv6_addr_any(&sk->sk_v6_daddr) && | |
85 | !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) | |
86 | continue; | |
87 | ||
88 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) | |
89 | continue; | |
90 | ||
91 | if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { | |
92 | if (ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr)) | |
93 | goto found; | |
94 | if (is_multicast && | |
95 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
96 | goto found; | |
97 | continue; | |
98 | } | |
99 | goto found; | |
100 | } | |
101 | sk = NULL; | |
102 | found: | |
103 | return sk; | |
104 | } | |
105 | ||
106 | /* | |
107 | * 0 - deliver | |
108 | * 1 - block | |
109 | */ | |
110 | static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb) | |
111 | { | |
112 | struct icmp6hdr _hdr; | |
113 | const struct icmp6hdr *hdr; | |
114 | ||
115 | /* We require only the four bytes of the ICMPv6 header, not any | |
116 | * additional bytes of message body in "struct icmp6hdr". | |
117 | */ | |
118 | hdr = skb_header_pointer(skb, skb_transport_offset(skb), | |
119 | ICMPV6_HDRLEN, &_hdr); | |
120 | if (hdr) { | |
121 | const __u32 *data = &raw6_sk(sk)->filter.data[0]; | |
122 | unsigned int type = hdr->icmp6_type; | |
123 | ||
124 | return (data[type >> 5] & (1U << (type & 31))) != 0; | |
125 | } | |
126 | return 1; | |
127 | } | |
128 | ||
129 | #if IS_ENABLED(CONFIG_IPV6_MIP6) | |
130 | typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb); | |
131 | ||
132 | static mh_filter_t __rcu *mh_filter __read_mostly; | |
133 | ||
134 | int rawv6_mh_filter_register(mh_filter_t filter) | |
135 | { | |
136 | rcu_assign_pointer(mh_filter, filter); | |
137 | return 0; | |
138 | } | |
139 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
140 | ||
141 | int rawv6_mh_filter_unregister(mh_filter_t filter) | |
142 | { | |
143 | RCU_INIT_POINTER(mh_filter, NULL); | |
144 | synchronize_rcu(); | |
145 | return 0; | |
146 | } | |
147 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
148 | ||
149 | #endif | |
150 | ||
151 | /* | |
152 | * demultiplex raw sockets. | |
153 | * (should consider queueing the skb in the sock receive_queue | |
154 | * without calling rawv6.c) | |
155 | * | |
156 | * Caller owns SKB so we must make clones. | |
157 | */ | |
158 | static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) | |
159 | { | |
160 | const struct in6_addr *saddr; | |
161 | const struct in6_addr *daddr; | |
162 | struct sock *sk; | |
163 | bool delivered = false; | |
164 | __u8 hash; | |
165 | struct net *net; | |
166 | ||
167 | saddr = &ipv6_hdr(skb)->saddr; | |
168 | daddr = saddr + 1; | |
169 | ||
170 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); | |
171 | ||
172 | read_lock(&raw_v6_hashinfo.lock); | |
173 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
174 | ||
175 | if (!sk) | |
176 | goto out; | |
177 | ||
178 | net = dev_net(skb->dev); | |
179 | sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, inet6_iif(skb)); | |
180 | ||
181 | while (sk) { | |
182 | int filtered; | |
183 | ||
184 | delivered = true; | |
185 | switch (nexthdr) { | |
186 | case IPPROTO_ICMPV6: | |
187 | filtered = icmpv6_filter(sk, skb); | |
188 | break; | |
189 | ||
190 | #if IS_ENABLED(CONFIG_IPV6_MIP6) | |
191 | case IPPROTO_MH: | |
192 | { | |
193 | /* XXX: To validate MH only once for each packet, | |
194 | * this is placed here. It should be after checking | |
195 | * xfrm policy, however it doesn't. The checking xfrm | |
196 | * policy is placed in rawv6_rcv() because it is | |
197 | * required for each socket. | |
198 | */ | |
199 | mh_filter_t *filter; | |
200 | ||
201 | filter = rcu_dereference(mh_filter); | |
202 | filtered = filter ? (*filter)(sk, skb) : 0; | |
203 | break; | |
204 | } | |
205 | #endif | |
206 | default: | |
207 | filtered = 0; | |
208 | break; | |
209 | } | |
210 | ||
211 | if (filtered < 0) | |
212 | break; | |
213 | if (filtered == 0) { | |
214 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); | |
215 | ||
216 | /* Not releasing hash table! */ | |
217 | if (clone) { | |
218 | nf_reset(clone); | |
219 | rawv6_rcv(sk, clone); | |
220 | } | |
221 | } | |
222 | sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, | |
223 | inet6_iif(skb)); | |
224 | } | |
225 | out: | |
226 | read_unlock(&raw_v6_hashinfo.lock); | |
227 | return delivered; | |
228 | } | |
229 | ||
230 | bool raw6_local_deliver(struct sk_buff *skb, int nexthdr) | |
231 | { | |
232 | struct sock *raw_sk; | |
233 | ||
234 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]); | |
235 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) | |
236 | raw_sk = NULL; | |
237 | ||
238 | return raw_sk != NULL; | |
239 | } | |
240 | ||
241 | /* This cleans up af_inet6 a bit. -DaveM */ | |
242 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
243 | { | |
244 | struct inet_sock *inet = inet_sk(sk); | |
245 | struct ipv6_pinfo *np = inet6_sk(sk); | |
246 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
247 | __be32 v4addr = 0; | |
248 | int addr_type; | |
249 | int err; | |
250 | ||
251 | if (addr_len < SIN6_LEN_RFC2133) | |
252 | return -EINVAL; | |
253 | ||
254 | if (addr->sin6_family != AF_INET6) | |
255 | return -EINVAL; | |
256 | ||
257 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
258 | ||
259 | /* Raw sockets are IPv6 only */ | |
260 | if (addr_type == IPV6_ADDR_MAPPED) | |
261 | return -EADDRNOTAVAIL; | |
262 | ||
263 | lock_sock(sk); | |
264 | ||
265 | err = -EINVAL; | |
266 | if (sk->sk_state != TCP_CLOSE) | |
267 | goto out; | |
268 | ||
269 | rcu_read_lock(); | |
270 | /* Check if the address belongs to the host. */ | |
271 | if (addr_type != IPV6_ADDR_ANY) { | |
272 | struct net_device *dev = NULL; | |
273 | ||
274 | if (__ipv6_addr_needs_scope_id(addr_type)) { | |
275 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
276 | addr->sin6_scope_id) { | |
277 | /* Override any existing binding, if another | |
278 | * one is supplied by user. | |
279 | */ | |
280 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
281 | } | |
282 | ||
283 | /* Binding to link-local address requires an interface */ | |
284 | if (!sk->sk_bound_dev_if) | |
285 | goto out_unlock; | |
286 | ||
287 | err = -ENODEV; | |
288 | dev = dev_get_by_index_rcu(sock_net(sk), | |
289 | sk->sk_bound_dev_if); | |
290 | if (!dev) | |
291 | goto out_unlock; | |
292 | } | |
293 | ||
294 | /* ipv4 addr of the socket is invalid. Only the | |
295 | * unspecified and mapped address have a v4 equivalent. | |
296 | */ | |
297 | v4addr = LOOPBACK4_IPV6; | |
298 | if (!(addr_type & IPV6_ADDR_MULTICAST) && | |
299 | !sock_net(sk)->ipv6.sysctl.ip_nonlocal_bind) { | |
300 | err = -EADDRNOTAVAIL; | |
301 | if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, | |
302 | dev, 0)) { | |
303 | goto out_unlock; | |
304 | } | |
305 | } | |
306 | } | |
307 | ||
308 | inet->inet_rcv_saddr = inet->inet_saddr = v4addr; | |
309 | sk->sk_v6_rcv_saddr = addr->sin6_addr; | |
310 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
311 | np->saddr = addr->sin6_addr; | |
312 | err = 0; | |
313 | out_unlock: | |
314 | rcu_read_unlock(); | |
315 | out: | |
316 | release_sock(sk); | |
317 | return err; | |
318 | } | |
319 | ||
320 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, | |
321 | struct inet6_skb_parm *opt, | |
322 | u8 type, u8 code, int offset, __be32 info) | |
323 | { | |
324 | struct inet_sock *inet = inet_sk(sk); | |
325 | struct ipv6_pinfo *np = inet6_sk(sk); | |
326 | int err; | |
327 | int harderr; | |
328 | ||
329 | /* Report error on raw socket, if: | |
330 | 1. User requested recverr. | |
331 | 2. Socket is connected (otherwise the error indication | |
332 | is useless without recverr and error is hard. | |
333 | */ | |
334 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
335 | return; | |
336 | ||
337 | harderr = icmpv6_err_convert(type, code, &err); | |
338 | if (type == ICMPV6_PKT_TOOBIG) { | |
339 | ip6_sk_update_pmtu(skb, sk, info); | |
340 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); | |
341 | } | |
342 | if (type == NDISC_REDIRECT) { | |
343 | ip6_sk_redirect(skb, sk); | |
344 | return; | |
345 | } | |
346 | if (np->recverr) { | |
347 | u8 *payload = skb->data; | |
348 | if (!inet->hdrincl) | |
349 | payload += offset; | |
350 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
351 | } | |
352 | ||
353 | if (np->recverr || harderr) { | |
354 | sk->sk_err = err; | |
355 | sk->sk_error_report(sk); | |
356 | } | |
357 | } | |
358 | ||
359 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, | |
360 | u8 type, u8 code, int inner_offset, __be32 info) | |
361 | { | |
362 | struct sock *sk; | |
363 | int hash; | |
364 | const struct in6_addr *saddr, *daddr; | |
365 | struct net *net; | |
366 | ||
367 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); | |
368 | ||
369 | read_lock(&raw_v6_hashinfo.lock); | |
370 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
371 | if (sk) { | |
372 | /* Note: ipv6_hdr(skb) != skb->data */ | |
373 | const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data; | |
374 | saddr = &ip6h->saddr; | |
375 | daddr = &ip6h->daddr; | |
376 | net = dev_net(skb->dev); | |
377 | ||
378 | while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, | |
379 | inet6_iif(skb)))) { | |
380 | rawv6_err(sk, skb, NULL, type, code, | |
381 | inner_offset, info); | |
382 | sk = sk_next(sk); | |
383 | } | |
384 | } | |
385 | read_unlock(&raw_v6_hashinfo.lock); | |
386 | } | |
387 | ||
388 | static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb) | |
389 | { | |
390 | if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) && | |
391 | skb_checksum_complete(skb)) { | |
392 | atomic_inc(&sk->sk_drops); | |
393 | kfree_skb(skb); | |
394 | return NET_RX_DROP; | |
395 | } | |
396 | ||
397 | /* Charge it to the socket. */ | |
398 | skb_dst_drop(skb); | |
399 | if (sock_queue_rcv_skb(sk, skb) < 0) { | |
400 | kfree_skb(skb); | |
401 | return NET_RX_DROP; | |
402 | } | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | /* | |
408 | * This is next to useless... | |
409 | * if we demultiplex in network layer we don't need the extra call | |
410 | * just to queue the skb... | |
411 | * maybe we could have the network decide upon a hint if it | |
412 | * should call raw_rcv for demultiplexing | |
413 | */ | |
414 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
415 | { | |
416 | struct inet_sock *inet = inet_sk(sk); | |
417 | struct raw6_sock *rp = raw6_sk(sk); | |
418 | ||
419 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { | |
420 | atomic_inc(&sk->sk_drops); | |
421 | kfree_skb(skb); | |
422 | return NET_RX_DROP; | |
423 | } | |
424 | ||
425 | if (!rp->checksum) | |
426 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
427 | ||
428 | if (skb->ip_summed == CHECKSUM_COMPLETE) { | |
429 | skb_postpull_rcsum(skb, skb_network_header(skb), | |
430 | skb_network_header_len(skb)); | |
431 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
432 | &ipv6_hdr(skb)->daddr, | |
433 | skb->len, inet->inet_num, skb->csum)) | |
434 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
435 | } | |
436 | if (!skb_csum_unnecessary(skb)) | |
437 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
438 | &ipv6_hdr(skb)->daddr, | |
439 | skb->len, | |
440 | inet->inet_num, 0)); | |
441 | ||
442 | if (inet->hdrincl) { | |
443 | if (skb_checksum_complete(skb)) { | |
444 | atomic_inc(&sk->sk_drops); | |
445 | kfree_skb(skb); | |
446 | return NET_RX_DROP; | |
447 | } | |
448 | } | |
449 | ||
450 | rawv6_rcv_skb(sk, skb); | |
451 | return 0; | |
452 | } | |
453 | ||
454 | ||
455 | /* | |
456 | * This should be easy, if there is something there | |
457 | * we return it, otherwise we block. | |
458 | */ | |
459 | ||
460 | static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, | |
461 | int noblock, int flags, int *addr_len) | |
462 | { | |
463 | struct ipv6_pinfo *np = inet6_sk(sk); | |
464 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); | |
465 | struct sk_buff *skb; | |
466 | size_t copied; | |
467 | int err; | |
468 | ||
469 | if (flags & MSG_OOB) | |
470 | return -EOPNOTSUPP; | |
471 | ||
472 | if (flags & MSG_ERRQUEUE) | |
473 | return ipv6_recv_error(sk, msg, len, addr_len); | |
474 | ||
475 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) | |
476 | return ipv6_recv_rxpmtu(sk, msg, len, addr_len); | |
477 | ||
478 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
479 | if (!skb) | |
480 | goto out; | |
481 | ||
482 | copied = skb->len; | |
483 | if (copied > len) { | |
484 | copied = len; | |
485 | msg->msg_flags |= MSG_TRUNC; | |
486 | } | |
487 | ||
488 | if (skb_csum_unnecessary(skb)) { | |
489 | err = skb_copy_datagram_msg(skb, 0, msg, copied); | |
490 | } else if (msg->msg_flags&MSG_TRUNC) { | |
491 | if (__skb_checksum_complete(skb)) | |
492 | goto csum_copy_err; | |
493 | err = skb_copy_datagram_msg(skb, 0, msg, copied); | |
494 | } else { | |
495 | err = skb_copy_and_csum_datagram_msg(skb, 0, msg); | |
496 | if (err == -EINVAL) | |
497 | goto csum_copy_err; | |
498 | } | |
499 | if (err) | |
500 | goto out_free; | |
501 | ||
502 | /* Copy the address. */ | |
503 | if (sin6) { | |
504 | sin6->sin6_family = AF_INET6; | |
505 | sin6->sin6_port = 0; | |
506 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; | |
507 | sin6->sin6_flowinfo = 0; | |
508 | sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr, | |
509 | inet6_iif(skb)); | |
510 | *addr_len = sizeof(*sin6); | |
511 | } | |
512 | ||
513 | sock_recv_ts_and_drops(msg, sk, skb); | |
514 | ||
515 | if (np->rxopt.all) | |
516 | ip6_datagram_recv_ctl(sk, msg, skb); | |
517 | ||
518 | err = copied; | |
519 | if (flags & MSG_TRUNC) | |
520 | err = skb->len; | |
521 | ||
522 | out_free: | |
523 | skb_free_datagram(sk, skb); | |
524 | out: | |
525 | return err; | |
526 | ||
527 | csum_copy_err: | |
528 | skb_kill_datagram(sk, skb, flags); | |
529 | ||
530 | /* Error for blocking case is chosen to masquerade | |
531 | as some normal condition. | |
532 | */ | |
533 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
534 | goto out; | |
535 | } | |
536 | ||
537 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, | |
538 | struct raw6_sock *rp) | |
539 | { | |
540 | struct sk_buff *skb; | |
541 | int err = 0; | |
542 | int offset; | |
543 | int len; | |
544 | int total_len; | |
545 | __wsum tmp_csum; | |
546 | __sum16 csum; | |
547 | ||
548 | if (!rp->checksum) | |
549 | goto send; | |
550 | ||
551 | skb = skb_peek(&sk->sk_write_queue); | |
552 | if (!skb) | |
553 | goto out; | |
554 | ||
555 | offset = rp->offset; | |
556 | total_len = inet_sk(sk)->cork.base.length; | |
557 | if (offset >= total_len - 1) { | |
558 | err = -EINVAL; | |
559 | ip6_flush_pending_frames(sk); | |
560 | goto out; | |
561 | } | |
562 | ||
563 | /* should be check HW csum miyazawa */ | |
564 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
565 | /* | |
566 | * Only one fragment on the socket. | |
567 | */ | |
568 | tmp_csum = skb->csum; | |
569 | } else { | |
570 | struct sk_buff *csum_skb = NULL; | |
571 | tmp_csum = 0; | |
572 | ||
573 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
574 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
575 | ||
576 | if (csum_skb) | |
577 | continue; | |
578 | ||
579 | len = skb->len - skb_transport_offset(skb); | |
580 | if (offset >= len) { | |
581 | offset -= len; | |
582 | continue; | |
583 | } | |
584 | ||
585 | csum_skb = skb; | |
586 | } | |
587 | ||
588 | skb = csum_skb; | |
589 | } | |
590 | ||
591 | offset += skb_transport_offset(skb); | |
592 | BUG_ON(skb_copy_bits(skb, offset, &csum, 2)); | |
593 | ||
594 | /* in case cksum was not initialized */ | |
595 | if (unlikely(csum)) | |
596 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); | |
597 | ||
598 | csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, | |
599 | total_len, fl6->flowi6_proto, tmp_csum); | |
600 | ||
601 | if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP) | |
602 | csum = CSUM_MANGLED_0; | |
603 | ||
604 | BUG_ON(skb_store_bits(skb, offset, &csum, 2)); | |
605 | ||
606 | send: | |
607 | err = ip6_push_pending_frames(sk); | |
608 | out: | |
609 | return err; | |
610 | } | |
611 | ||
612 | static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length, | |
613 | struct flowi6 *fl6, struct dst_entry **dstp, | |
614 | unsigned int flags) | |
615 | { | |
616 | struct ipv6_pinfo *np = inet6_sk(sk); | |
617 | struct ipv6hdr *iph; | |
618 | struct sk_buff *skb; | |
619 | int err; | |
620 | struct rt6_info *rt = (struct rt6_info *)*dstp; | |
621 | int hlen = LL_RESERVED_SPACE(rt->dst.dev); | |
622 | int tlen = rt->dst.dev->needed_tailroom; | |
623 | ||
624 | if (length > rt->dst.dev->mtu) { | |
625 | ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu); | |
626 | return -EMSGSIZE; | |
627 | } | |
628 | if (flags&MSG_PROBE) | |
629 | goto out; | |
630 | ||
631 | skb = sock_alloc_send_skb(sk, | |
632 | length + hlen + tlen + 15, | |
633 | flags & MSG_DONTWAIT, &err); | |
634 | if (!skb) | |
635 | goto error; | |
636 | skb_reserve(skb, hlen); | |
637 | ||
638 | skb->protocol = htons(ETH_P_IPV6); | |
639 | skb->priority = sk->sk_priority; | |
640 | skb->mark = sk->sk_mark; | |
641 | skb_dst_set(skb, &rt->dst); | |
642 | *dstp = NULL; | |
643 | ||
644 | skb_put(skb, length); | |
645 | skb_reset_network_header(skb); | |
646 | iph = ipv6_hdr(skb); | |
647 | ||
648 | skb->ip_summed = CHECKSUM_NONE; | |
649 | ||
650 | skb->transport_header = skb->network_header; | |
651 | err = memcpy_from_msg(iph, msg, length); | |
652 | if (err) | |
653 | goto error_fault; | |
654 | ||
655 | IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); | |
656 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, sk, skb, | |
657 | NULL, rt->dst.dev, dst_output); | |
658 | if (err > 0) | |
659 | err = net_xmit_errno(err); | |
660 | if (err) | |
661 | goto error; | |
662 | out: | |
663 | return 0; | |
664 | ||
665 | error_fault: | |
666 | err = -EFAULT; | |
667 | kfree_skb(skb); | |
668 | error: | |
669 | IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); | |
670 | if (err == -ENOBUFS && !np->recverr) | |
671 | err = 0; | |
672 | return err; | |
673 | } | |
674 | ||
675 | struct raw6_frag_vec { | |
676 | struct msghdr *msg; | |
677 | int hlen; | |
678 | char c[4]; | |
679 | }; | |
680 | ||
681 | static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6) | |
682 | { | |
683 | int err = 0; | |
684 | switch (fl6->flowi6_proto) { | |
685 | case IPPROTO_ICMPV6: | |
686 | rfv->hlen = 2; | |
687 | err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen); | |
688 | if (!err) { | |
689 | fl6->fl6_icmp_type = rfv->c[0]; | |
690 | fl6->fl6_icmp_code = rfv->c[1]; | |
691 | } | |
692 | break; | |
693 | case IPPROTO_MH: | |
694 | rfv->hlen = 4; | |
695 | err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen); | |
696 | if (!err) | |
697 | fl6->fl6_mh_type = rfv->c[2]; | |
698 | } | |
699 | return err; | |
700 | } | |
701 | ||
702 | static int raw6_getfrag(void *from, char *to, int offset, int len, int odd, | |
703 | struct sk_buff *skb) | |
704 | { | |
705 | struct raw6_frag_vec *rfv = from; | |
706 | ||
707 | if (offset < rfv->hlen) { | |
708 | int copy = min(rfv->hlen - offset, len); | |
709 | ||
710 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
711 | memcpy(to, rfv->c + offset, copy); | |
712 | else | |
713 | skb->csum = csum_block_add( | |
714 | skb->csum, | |
715 | csum_partial_copy_nocheck(rfv->c + offset, | |
716 | to, copy, 0), | |
717 | odd); | |
718 | ||
719 | odd = 0; | |
720 | offset += copy; | |
721 | to += copy; | |
722 | len -= copy; | |
723 | ||
724 | if (!len) | |
725 | return 0; | |
726 | } | |
727 | ||
728 | offset -= rfv->hlen; | |
729 | ||
730 | return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb); | |
731 | } | |
732 | ||
733 | static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) | |
734 | { | |
735 | struct ipv6_txoptions opt_space; | |
736 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); | |
737 | struct in6_addr *daddr, *final_p, final; | |
738 | struct inet_sock *inet = inet_sk(sk); | |
739 | struct ipv6_pinfo *np = inet6_sk(sk); | |
740 | struct raw6_sock *rp = raw6_sk(sk); | |
741 | struct ipv6_txoptions *opt = NULL; | |
742 | struct ip6_flowlabel *flowlabel = NULL; | |
743 | struct dst_entry *dst = NULL; | |
744 | struct raw6_frag_vec rfv; | |
745 | struct flowi6 fl6; | |
746 | int addr_len = msg->msg_namelen; | |
747 | int hlimit = -1; | |
748 | int tclass = -1; | |
749 | int dontfrag = -1; | |
750 | u16 proto; | |
751 | int err; | |
752 | ||
753 | /* Rough check on arithmetic overflow, | |
754 | better check is made in ip6_append_data(). | |
755 | */ | |
756 | if (len > INT_MAX) | |
757 | return -EMSGSIZE; | |
758 | ||
759 | /* Mirror BSD error message compatibility */ | |
760 | if (msg->msg_flags & MSG_OOB) | |
761 | return -EOPNOTSUPP; | |
762 | ||
763 | /* | |
764 | * Get and verify the address. | |
765 | */ | |
766 | memset(&fl6, 0, sizeof(fl6)); | |
767 | ||
768 | fl6.flowi6_mark = sk->sk_mark; | |
769 | ||
770 | if (sin6) { | |
771 | if (addr_len < SIN6_LEN_RFC2133) | |
772 | return -EINVAL; | |
773 | ||
774 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) | |
775 | return -EAFNOSUPPORT; | |
776 | ||
777 | /* port is the proto value [0..255] carried in nexthdr */ | |
778 | proto = ntohs(sin6->sin6_port); | |
779 | ||
780 | if (!proto) | |
781 | proto = inet->inet_num; | |
782 | else if (proto != inet->inet_num) | |
783 | return -EINVAL; | |
784 | ||
785 | if (proto > 255) | |
786 | return -EINVAL; | |
787 | ||
788 | daddr = &sin6->sin6_addr; | |
789 | if (np->sndflow) { | |
790 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; | |
791 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
792 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
793 | if (!flowlabel) | |
794 | return -EINVAL; | |
795 | } | |
796 | } | |
797 | ||
798 | /* | |
799 | * Otherwise it will be difficult to maintain | |
800 | * sk->sk_dst_cache. | |
801 | */ | |
802 | if (sk->sk_state == TCP_ESTABLISHED && | |
803 | ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) | |
804 | daddr = &sk->sk_v6_daddr; | |
805 | ||
806 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
807 | sin6->sin6_scope_id && | |
808 | __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) | |
809 | fl6.flowi6_oif = sin6->sin6_scope_id; | |
810 | } else { | |
811 | if (sk->sk_state != TCP_ESTABLISHED) | |
812 | return -EDESTADDRREQ; | |
813 | ||
814 | proto = inet->inet_num; | |
815 | daddr = &sk->sk_v6_daddr; | |
816 | fl6.flowlabel = np->flow_label; | |
817 | } | |
818 | ||
819 | if (fl6.flowi6_oif == 0) | |
820 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
821 | ||
822 | if (msg->msg_controllen) { | |
823 | opt = &opt_space; | |
824 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
825 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
826 | ||
827 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, | |
828 | &hlimit, &tclass, &dontfrag); | |
829 | if (err < 0) { | |
830 | fl6_sock_release(flowlabel); | |
831 | return err; | |
832 | } | |
833 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { | |
834 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
835 | if (!flowlabel) | |
836 | return -EINVAL; | |
837 | } | |
838 | if (!(opt->opt_nflen|opt->opt_flen)) | |
839 | opt = NULL; | |
840 | } | |
841 | if (!opt) | |
842 | opt = np->opt; | |
843 | if (flowlabel) | |
844 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
845 | opt = ipv6_fixup_options(&opt_space, opt); | |
846 | ||
847 | fl6.flowi6_proto = proto; | |
848 | rfv.msg = msg; | |
849 | rfv.hlen = 0; | |
850 | err = rawv6_probe_proto_opt(&rfv, &fl6); | |
851 | if (err) | |
852 | goto out; | |
853 | ||
854 | if (!ipv6_addr_any(daddr)) | |
855 | fl6.daddr = *daddr; | |
856 | else | |
857 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
858 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
859 | fl6.saddr = np->saddr; | |
860 | ||
861 | final_p = fl6_update_dst(&fl6, opt, &final); | |
862 | ||
863 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) | |
864 | fl6.flowi6_oif = np->mcast_oif; | |
865 | else if (!fl6.flowi6_oif) | |
866 | fl6.flowi6_oif = np->ucast_oif; | |
867 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); | |
868 | ||
869 | if (inet->hdrincl) | |
870 | fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH; | |
871 | ||
872 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p); | |
873 | if (IS_ERR(dst)) { | |
874 | err = PTR_ERR(dst); | |
875 | goto out; | |
876 | } | |
877 | if (hlimit < 0) | |
878 | hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); | |
879 | ||
880 | if (tclass < 0) | |
881 | tclass = np->tclass; | |
882 | ||
883 | if (dontfrag < 0) | |
884 | dontfrag = np->dontfrag; | |
885 | ||
886 | if (msg->msg_flags&MSG_CONFIRM) | |
887 | goto do_confirm; | |
888 | ||
889 | back_from_confirm: | |
890 | if (inet->hdrincl) | |
891 | err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst, msg->msg_flags); | |
892 | else { | |
893 | lock_sock(sk); | |
894 | err = ip6_append_data(sk, raw6_getfrag, &rfv, | |
895 | len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info *)dst, | |
896 | msg->msg_flags, dontfrag); | |
897 | ||
898 | if (err) | |
899 | ip6_flush_pending_frames(sk); | |
900 | else if (!(msg->msg_flags & MSG_MORE)) | |
901 | err = rawv6_push_pending_frames(sk, &fl6, rp); | |
902 | release_sock(sk); | |
903 | } | |
904 | done: | |
905 | dst_release(dst); | |
906 | out: | |
907 | fl6_sock_release(flowlabel); | |
908 | return err < 0 ? err : len; | |
909 | do_confirm: | |
910 | dst_confirm(dst); | |
911 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
912 | goto back_from_confirm; | |
913 | err = 0; | |
914 | goto done; | |
915 | } | |
916 | ||
917 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, | |
918 | char __user *optval, int optlen) | |
919 | { | |
920 | switch (optname) { | |
921 | case ICMPV6_FILTER: | |
922 | if (optlen > sizeof(struct icmp6_filter)) | |
923 | optlen = sizeof(struct icmp6_filter); | |
924 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
925 | return -EFAULT; | |
926 | return 0; | |
927 | default: | |
928 | return -ENOPROTOOPT; | |
929 | } | |
930 | ||
931 | return 0; | |
932 | } | |
933 | ||
934 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, | |
935 | char __user *optval, int __user *optlen) | |
936 | { | |
937 | int len; | |
938 | ||
939 | switch (optname) { | |
940 | case ICMPV6_FILTER: | |
941 | if (get_user(len, optlen)) | |
942 | return -EFAULT; | |
943 | if (len < 0) | |
944 | return -EINVAL; | |
945 | if (len > sizeof(struct icmp6_filter)) | |
946 | len = sizeof(struct icmp6_filter); | |
947 | if (put_user(len, optlen)) | |
948 | return -EFAULT; | |
949 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
950 | return -EFAULT; | |
951 | return 0; | |
952 | default: | |
953 | return -ENOPROTOOPT; | |
954 | } | |
955 | ||
956 | return 0; | |
957 | } | |
958 | ||
959 | ||
960 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
961 | char __user *optval, unsigned int optlen) | |
962 | { | |
963 | struct raw6_sock *rp = raw6_sk(sk); | |
964 | int val; | |
965 | ||
966 | if (get_user(val, (int __user *)optval)) | |
967 | return -EFAULT; | |
968 | ||
969 | switch (optname) { | |
970 | case IPV6_CHECKSUM: | |
971 | if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 && | |
972 | level == IPPROTO_IPV6) { | |
973 | /* | |
974 | * RFC3542 tells that IPV6_CHECKSUM socket | |
975 | * option in the IPPROTO_IPV6 level is not | |
976 | * allowed on ICMPv6 sockets. | |
977 | * If you want to set it, use IPPROTO_RAW | |
978 | * level IPV6_CHECKSUM socket option | |
979 | * (Linux extension). | |
980 | */ | |
981 | return -EINVAL; | |
982 | } | |
983 | ||
984 | /* You may get strange result with a positive odd offset; | |
985 | RFC2292bis agrees with me. */ | |
986 | if (val > 0 && (val&1)) | |
987 | return -EINVAL; | |
988 | if (val < 0) { | |
989 | rp->checksum = 0; | |
990 | } else { | |
991 | rp->checksum = 1; | |
992 | rp->offset = val; | |
993 | } | |
994 | ||
995 | return 0; | |
996 | ||
997 | default: | |
998 | return -ENOPROTOOPT; | |
999 | } | |
1000 | } | |
1001 | ||
1002 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, | |
1003 | char __user *optval, unsigned int optlen) | |
1004 | { | |
1005 | switch (level) { | |
1006 | case SOL_RAW: | |
1007 | break; | |
1008 | ||
1009 | case SOL_ICMPV6: | |
1010 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1011 | return -EOPNOTSUPP; | |
1012 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1013 | case SOL_IPV6: | |
1014 | if (optname == IPV6_CHECKSUM) | |
1015 | break; | |
1016 | default: | |
1017 | return ipv6_setsockopt(sk, level, optname, optval, optlen); | |
1018 | } | |
1019 | ||
1020 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); | |
1021 | } | |
1022 | ||
1023 | #ifdef CONFIG_COMPAT | |
1024 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
1025 | char __user *optval, unsigned int optlen) | |
1026 | { | |
1027 | switch (level) { | |
1028 | case SOL_RAW: | |
1029 | break; | |
1030 | case SOL_ICMPV6: | |
1031 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1032 | return -EOPNOTSUPP; | |
1033 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1034 | case SOL_IPV6: | |
1035 | if (optname == IPV6_CHECKSUM) | |
1036 | break; | |
1037 | default: | |
1038 | return compat_ipv6_setsockopt(sk, level, optname, | |
1039 | optval, optlen); | |
1040 | } | |
1041 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); | |
1042 | } | |
1043 | #endif | |
1044 | ||
1045 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1046 | char __user *optval, int __user *optlen) | |
1047 | { | |
1048 | struct raw6_sock *rp = raw6_sk(sk); | |
1049 | int val, len; | |
1050 | ||
1051 | if (get_user(len, optlen)) | |
1052 | return -EFAULT; | |
1053 | ||
1054 | switch (optname) { | |
1055 | case IPV6_CHECKSUM: | |
1056 | /* | |
1057 | * We allow getsockopt() for IPPROTO_IPV6-level | |
1058 | * IPV6_CHECKSUM socket option on ICMPv6 sockets | |
1059 | * since RFC3542 is silent about it. | |
1060 | */ | |
1061 | if (rp->checksum == 0) | |
1062 | val = -1; | |
1063 | else | |
1064 | val = rp->offset; | |
1065 | break; | |
1066 | ||
1067 | default: | |
1068 | return -ENOPROTOOPT; | |
1069 | } | |
1070 | ||
1071 | len = min_t(unsigned int, sizeof(int), len); | |
1072 | ||
1073 | if (put_user(len, optlen)) | |
1074 | return -EFAULT; | |
1075 | if (copy_to_user(optval, &val, len)) | |
1076 | return -EFAULT; | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1081 | char __user *optval, int __user *optlen) | |
1082 | { | |
1083 | switch (level) { | |
1084 | case SOL_RAW: | |
1085 | break; | |
1086 | ||
1087 | case SOL_ICMPV6: | |
1088 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1089 | return -EOPNOTSUPP; | |
1090 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1091 | case SOL_IPV6: | |
1092 | if (optname == IPV6_CHECKSUM) | |
1093 | break; | |
1094 | default: | |
1095 | return ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1096 | } | |
1097 | ||
1098 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); | |
1099 | } | |
1100 | ||
1101 | #ifdef CONFIG_COMPAT | |
1102 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1103 | char __user *optval, int __user *optlen) | |
1104 | { | |
1105 | switch (level) { | |
1106 | case SOL_RAW: | |
1107 | break; | |
1108 | case SOL_ICMPV6: | |
1109 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1110 | return -EOPNOTSUPP; | |
1111 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1112 | case SOL_IPV6: | |
1113 | if (optname == IPV6_CHECKSUM) | |
1114 | break; | |
1115 | default: | |
1116 | return compat_ipv6_getsockopt(sk, level, optname, | |
1117 | optval, optlen); | |
1118 | } | |
1119 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); | |
1120 | } | |
1121 | #endif | |
1122 | ||
1123 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) | |
1124 | { | |
1125 | switch (cmd) { | |
1126 | case SIOCOUTQ: { | |
1127 | int amount = sk_wmem_alloc_get(sk); | |
1128 | ||
1129 | return put_user(amount, (int __user *)arg); | |
1130 | } | |
1131 | case SIOCINQ: { | |
1132 | struct sk_buff *skb; | |
1133 | int amount = 0; | |
1134 | ||
1135 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
1136 | skb = skb_peek(&sk->sk_receive_queue); | |
1137 | if (skb) | |
1138 | amount = skb_tail_pointer(skb) - | |
1139 | skb_transport_header(skb); | |
1140 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
1141 | return put_user(amount, (int __user *)arg); | |
1142 | } | |
1143 | ||
1144 | default: | |
1145 | #ifdef CONFIG_IPV6_MROUTE | |
1146 | return ip6mr_ioctl(sk, cmd, (void __user *)arg); | |
1147 | #else | |
1148 | return -ENOIOCTLCMD; | |
1149 | #endif | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | #ifdef CONFIG_COMPAT | |
1154 | static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) | |
1155 | { | |
1156 | switch (cmd) { | |
1157 | case SIOCOUTQ: | |
1158 | case SIOCINQ: | |
1159 | return -ENOIOCTLCMD; | |
1160 | default: | |
1161 | #ifdef CONFIG_IPV6_MROUTE | |
1162 | return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg)); | |
1163 | #else | |
1164 | return -ENOIOCTLCMD; | |
1165 | #endif | |
1166 | } | |
1167 | } | |
1168 | #endif | |
1169 | ||
1170 | static void rawv6_close(struct sock *sk, long timeout) | |
1171 | { | |
1172 | if (inet_sk(sk)->inet_num == IPPROTO_RAW) | |
1173 | ip6_ra_control(sk, -1); | |
1174 | ip6mr_sk_done(sk); | |
1175 | sk_common_release(sk); | |
1176 | } | |
1177 | ||
1178 | static void raw6_destroy(struct sock *sk) | |
1179 | { | |
1180 | lock_sock(sk); | |
1181 | ip6_flush_pending_frames(sk); | |
1182 | release_sock(sk); | |
1183 | ||
1184 | inet6_destroy_sock(sk); | |
1185 | } | |
1186 | ||
1187 | static int rawv6_init_sk(struct sock *sk) | |
1188 | { | |
1189 | struct raw6_sock *rp = raw6_sk(sk); | |
1190 | ||
1191 | switch (inet_sk(sk)->inet_num) { | |
1192 | case IPPROTO_ICMPV6: | |
1193 | rp->checksum = 1; | |
1194 | rp->offset = 2; | |
1195 | break; | |
1196 | case IPPROTO_MH: | |
1197 | rp->checksum = 1; | |
1198 | rp->offset = 4; | |
1199 | break; | |
1200 | default: | |
1201 | break; | |
1202 | } | |
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | struct proto rawv6_prot = { | |
1207 | .name = "RAWv6", | |
1208 | .owner = THIS_MODULE, | |
1209 | .close = rawv6_close, | |
1210 | .destroy = raw6_destroy, | |
1211 | .connect = ip6_datagram_connect_v6_only, | |
1212 | .disconnect = udp_disconnect, | |
1213 | .ioctl = rawv6_ioctl, | |
1214 | .init = rawv6_init_sk, | |
1215 | .setsockopt = rawv6_setsockopt, | |
1216 | .getsockopt = rawv6_getsockopt, | |
1217 | .sendmsg = rawv6_sendmsg, | |
1218 | .recvmsg = rawv6_recvmsg, | |
1219 | .bind = rawv6_bind, | |
1220 | .backlog_rcv = rawv6_rcv_skb, | |
1221 | .hash = raw_hash_sk, | |
1222 | .unhash = raw_unhash_sk, | |
1223 | .obj_size = sizeof(struct raw6_sock), | |
1224 | .h.raw_hash = &raw_v6_hashinfo, | |
1225 | #ifdef CONFIG_COMPAT | |
1226 | .compat_setsockopt = compat_rawv6_setsockopt, | |
1227 | .compat_getsockopt = compat_rawv6_getsockopt, | |
1228 | .compat_ioctl = compat_rawv6_ioctl, | |
1229 | #endif | |
1230 | }; | |
1231 | ||
1232 | #ifdef CONFIG_PROC_FS | |
1233 | static int raw6_seq_show(struct seq_file *seq, void *v) | |
1234 | { | |
1235 | if (v == SEQ_START_TOKEN) { | |
1236 | seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); | |
1237 | } else { | |
1238 | struct sock *sp = v; | |
1239 | __u16 srcp = inet_sk(sp)->inet_num; | |
1240 | ip6_dgram_sock_seq_show(seq, v, srcp, 0, | |
1241 | raw_seq_private(seq)->bucket); | |
1242 | } | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | static const struct seq_operations raw6_seq_ops = { | |
1247 | .start = raw_seq_start, | |
1248 | .next = raw_seq_next, | |
1249 | .stop = raw_seq_stop, | |
1250 | .show = raw6_seq_show, | |
1251 | }; | |
1252 | ||
1253 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1254 | { | |
1255 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); | |
1256 | } | |
1257 | ||
1258 | static const struct file_operations raw6_seq_fops = { | |
1259 | .owner = THIS_MODULE, | |
1260 | .open = raw6_seq_open, | |
1261 | .read = seq_read, | |
1262 | .llseek = seq_lseek, | |
1263 | .release = seq_release_net, | |
1264 | }; | |
1265 | ||
1266 | static int __net_init raw6_init_net(struct net *net) | |
1267 | { | |
1268 | if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops)) | |
1269 | return -ENOMEM; | |
1270 | ||
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | static void __net_exit raw6_exit_net(struct net *net) | |
1275 | { | |
1276 | remove_proc_entry("raw6", net->proc_net); | |
1277 | } | |
1278 | ||
1279 | static struct pernet_operations raw6_net_ops = { | |
1280 | .init = raw6_init_net, | |
1281 | .exit = raw6_exit_net, | |
1282 | }; | |
1283 | ||
1284 | int __init raw6_proc_init(void) | |
1285 | { | |
1286 | return register_pernet_subsys(&raw6_net_ops); | |
1287 | } | |
1288 | ||
1289 | void raw6_proc_exit(void) | |
1290 | { | |
1291 | unregister_pernet_subsys(&raw6_net_ops); | |
1292 | } | |
1293 | #endif /* CONFIG_PROC_FS */ | |
1294 | ||
1295 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1296 | static const struct proto_ops inet6_sockraw_ops = { | |
1297 | .family = PF_INET6, | |
1298 | .owner = THIS_MODULE, | |
1299 | .release = inet6_release, | |
1300 | .bind = inet6_bind, | |
1301 | .connect = inet_dgram_connect, /* ok */ | |
1302 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1303 | .accept = sock_no_accept, /* a do nothing */ | |
1304 | .getname = inet6_getname, | |
1305 | .poll = datagram_poll, /* ok */ | |
1306 | .ioctl = inet6_ioctl, /* must change */ | |
1307 | .listen = sock_no_listen, /* ok */ | |
1308 | .shutdown = inet_shutdown, /* ok */ | |
1309 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1310 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1311 | .sendmsg = inet_sendmsg, /* ok */ | |
1312 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1313 | .mmap = sock_no_mmap, | |
1314 | .sendpage = sock_no_sendpage, | |
1315 | #ifdef CONFIG_COMPAT | |
1316 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1317 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1318 | #endif | |
1319 | }; | |
1320 | ||
1321 | static struct inet_protosw rawv6_protosw = { | |
1322 | .type = SOCK_RAW, | |
1323 | .protocol = IPPROTO_IP, /* wild card */ | |
1324 | .prot = &rawv6_prot, | |
1325 | .ops = &inet6_sockraw_ops, | |
1326 | .flags = INET_PROTOSW_REUSE, | |
1327 | }; | |
1328 | ||
1329 | int __init rawv6_init(void) | |
1330 | { | |
1331 | return inet6_register_protosw(&rawv6_protosw); | |
1332 | } | |
1333 | ||
1334 | void rawv6_exit(void) | |
1335 | { | |
1336 | inet6_unregister_protosw(&rawv6_protosw); | |
1337 | } |