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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * RAW sockets for IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * |
8 | * Adapted from linux/net/ipv4/raw.c | |
9 | * | |
1da177e4 LT |
10 | * Fixes: |
11 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
1ab1457c | 12 | * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance) |
1da177e4 LT |
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> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1da177e4 | 25 | #include <linux/sockios.h> |
1da177e4 LT |
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> | |
3305b80c | 33 | #include <linux/skbuff.h> |
e2d57766 | 34 | #include <linux/compat.h> |
29778bec | 35 | #include <linux/uaccess.h> |
1da177e4 LT |
36 | #include <asm/ioctls.h> |
37 | ||
457c4cbc | 38 | #include <net/net_namespace.h> |
1da177e4 LT |
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> | |
c752f073 | 52 | #include <net/tcp_states.h> |
07a93626 | 53 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
7be96f76 MN |
54 | #include <net/mip6.h> |
55 | #endif | |
7bc570c8 | 56 | #include <linux/mroute6.h> |
1da177e4 | 57 | |
b673e4df | 58 | #include <net/raw.h> |
1da177e4 LT |
59 | #include <net/rawv6.h> |
60 | #include <net/xfrm.h> | |
61 | ||
62 | #include <linux/proc_fs.h> | |
63 | #include <linux/seq_file.h> | |
bc3b2d7f | 64 | #include <linux/export.h> |
1da177e4 | 65 | |
d1c53c8e WA |
66 | #define ICMPV6_HDRLEN 4 /* ICMPv6 header, RFC 4443 Section 2.1 */ |
67 | ||
b673e4df | 68 | static struct raw_hashinfo raw_v6_hashinfo = { |
938b93ad | 69 | .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), |
b673e4df | 70 | }; |
1da177e4 | 71 | |
be185884 | 72 | static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, |
b71d1d42 ED |
73 | unsigned short num, const struct in6_addr *loc_addr, |
74 | const struct in6_addr *rmt_addr, int dif) | |
1da177e4 | 75 | { |
a50feda5 | 76 | bool is_multicast = ipv6_addr_is_multicast(loc_addr); |
1da177e4 | 77 | |
b67bfe0d | 78 | sk_for_each_from(sk) |
c720c7e8 | 79 | if (inet_sk(sk)->inet_num == num) { |
1da177e4 | 80 | |
878628fb | 81 | if (!net_eq(sock_net(sk), net)) |
be185884 PE |
82 | continue; |
83 | ||
efe4208f ED |
84 | if (!ipv6_addr_any(&sk->sk_v6_daddr) && |
85 | !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) | |
1da177e4 LT |
86 | continue; |
87 | ||
0bd1b59b AM |
88 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
89 | continue; | |
90 | ||
efe4208f ED |
91 | if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { |
92 | if (ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr)) | |
1da177e4 LT |
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 | */ | |
1b05c4b5 | 110 | static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb) |
1da177e4 | 111 | { |
9cc08af3 | 112 | struct icmp6hdr _hdr; |
1b05c4b5 | 113 | const struct icmp6hdr *hdr; |
1da177e4 | 114 | |
d1c53c8e WA |
115 | /* We require only the four bytes of the ICMPv6 header, not any |
116 | * additional bytes of message body in "struct icmp6hdr". | |
117 | */ | |
1b05c4b5 | 118 | hdr = skb_header_pointer(skb, skb_transport_offset(skb), |
d1c53c8e | 119 | ICMPV6_HDRLEN, &_hdr); |
1b05c4b5 ED |
120 | if (hdr) { |
121 | const __u32 *data = &raw6_sk(sk)->filter.data[0]; | |
122 | unsigned int type = hdr->icmp6_type; | |
1da177e4 | 123 | |
1b05c4b5 | 124 | return (data[type >> 5] & (1U << (type & 31))) != 0; |
1da177e4 | 125 | } |
1b05c4b5 | 126 | return 1; |
1da177e4 LT |
127 | } |
128 | ||
07a93626 | 129 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
f2eda47d | 130 | typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb); |
59fbb3a6 | 131 | |
f2eda47d ED |
132 | static mh_filter_t __rcu *mh_filter __read_mostly; |
133 | ||
134 | int rawv6_mh_filter_register(mh_filter_t filter) | |
59fbb3a6 | 135 | { |
cf778b00 | 136 | rcu_assign_pointer(mh_filter, filter); |
59fbb3a6 MN |
137 | return 0; |
138 | } | |
139 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
140 | ||
f2eda47d | 141 | int rawv6_mh_filter_unregister(mh_filter_t filter) |
59fbb3a6 | 142 | { |
a9b3cd7f | 143 | RCU_INIT_POINTER(mh_filter, NULL); |
59fbb3a6 MN |
144 | synchronize_rcu(); |
145 | return 0; | |
146 | } | |
147 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
148 | ||
149 | #endif | |
150 | ||
1da177e4 LT |
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 | */ | |
a50feda5 | 158 | static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 | 159 | { |
b71d1d42 ED |
160 | const struct in6_addr *saddr; |
161 | const struct in6_addr *daddr; | |
1da177e4 | 162 | struct sock *sk; |
a50feda5 | 163 | bool delivered = false; |
1da177e4 | 164 | __u8 hash; |
be185884 | 165 | struct net *net; |
1da177e4 | 166 | |
0660e03f | 167 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
168 | daddr = saddr + 1; |
169 | ||
f9242b6b | 170 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
1da177e4 | 171 | |
b673e4df PE |
172 | read_lock(&raw_v6_hashinfo.lock); |
173 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 | 174 | |
63159f29 | 175 | if (!sk) |
1da177e4 LT |
176 | goto out; |
177 | ||
c346dca1 | 178 | net = dev_net(skb->dev); |
4330487a | 179 | sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, inet6_iif(skb)); |
1da177e4 LT |
180 | |
181 | while (sk) { | |
7be96f76 MN |
182 | int filtered; |
183 | ||
a50feda5 | 184 | delivered = true; |
7be96f76 MN |
185 | switch (nexthdr) { |
186 | case IPPROTO_ICMPV6: | |
187 | filtered = icmpv6_filter(sk, skb); | |
188 | break; | |
59fbb3a6 | 189 | |
07a93626 | 190 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
7be96f76 | 191 | case IPPROTO_MH: |
59fbb3a6 | 192 | { |
7be96f76 MN |
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 | */ | |
f2eda47d | 199 | mh_filter_t *filter; |
59fbb3a6 MN |
200 | |
201 | filter = rcu_dereference(mh_filter); | |
f2eda47d | 202 | filtered = filter ? (*filter)(sk, skb) : 0; |
7be96f76 | 203 | break; |
59fbb3a6 | 204 | } |
7be96f76 MN |
205 | #endif |
206 | default: | |
207 | filtered = 0; | |
208 | break; | |
209 | } | |
210 | ||
211 | if (filtered < 0) | |
212 | break; | |
213 | if (filtered == 0) { | |
1da177e4 LT |
214 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
215 | ||
216 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
217 | if (clone) { |
218 | nf_reset(clone); | |
1da177e4 | 219 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 220 | } |
1da177e4 | 221 | } |
be185884 | 222 | sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, |
4330487a | 223 | inet6_iif(skb)); |
1da177e4 LT |
224 | } |
225 | out: | |
b673e4df | 226 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 227 | return delivered; |
1da177e4 LT |
228 | } |
229 | ||
a50feda5 | 230 | bool raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
69d6da0b PE |
231 | { |
232 | struct sock *raw_sk; | |
233 | ||
f9242b6b | 234 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]); |
69d6da0b PE |
235 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
236 | raw_sk = NULL; | |
237 | ||
238 | return raw_sk != NULL; | |
239 | } | |
240 | ||
1da177e4 LT |
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; | |
e69a4adc | 247 | __be32 v4addr = 0; |
1da177e4 LT |
248 | int addr_type; |
249 | int err; | |
250 | ||
251 | if (addr_len < SIN6_LEN_RFC2133) | |
252 | return -EINVAL; | |
82b276cd HFS |
253 | |
254 | if (addr->sin6_family != AF_INET6) | |
255 | return -EINVAL; | |
256 | ||
1da177e4 LT |
257 | addr_type = ipv6_addr_type(&addr->sin6_addr); |
258 | ||
259 | /* Raw sockets are IPv6 only */ | |
260 | if (addr_type == IPV6_ADDR_MAPPED) | |
fd5c0027 | 261 | return -EADDRNOTAVAIL; |
1da177e4 LT |
262 | |
263 | lock_sock(sk); | |
264 | ||
265 | err = -EINVAL; | |
266 | if (sk->sk_state != TCP_CLOSE) | |
267 | goto out; | |
268 | ||
fd5c0027 | 269 | rcu_read_lock(); |
1da177e4 LT |
270 | /* Check if the address belongs to the host. */ |
271 | if (addr_type != IPV6_ADDR_ANY) { | |
272 | struct net_device *dev = NULL; | |
273 | ||
842df073 | 274 | if (__ipv6_addr_needs_scope_id(addr_type)) { |
1da177e4 LT |
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 | } | |
1ab1457c | 282 | |
1da177e4 LT |
283 | /* Binding to link-local address requires an interface */ |
284 | if (!sk->sk_bound_dev_if) | |
fd5c0027 | 285 | goto out_unlock; |
1da177e4 | 286 | |
fd5c0027 ED |
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; | |
1da177e4 | 292 | } |
1ab1457c | 293 | |
1da177e4 LT |
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 | err = -EADDRNOTAVAIL; | |
3b1e0a65 | 300 | if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, |
bfeade08 | 301 | dev, 0)) { |
fd5c0027 | 302 | goto out_unlock; |
1da177e4 LT |
303 | } |
304 | } | |
1da177e4 LT |
305 | } |
306 | ||
c720c7e8 | 307 | inet->inet_rcv_saddr = inet->inet_saddr = v4addr; |
efe4208f | 308 | sk->sk_v6_rcv_saddr = addr->sin6_addr; |
1da177e4 | 309 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
4e3fd7a0 | 310 | np->saddr = addr->sin6_addr; |
1da177e4 | 311 | err = 0; |
fd5c0027 ED |
312 | out_unlock: |
313 | rcu_read_unlock(); | |
1da177e4 LT |
314 | out: |
315 | release_sock(sk); | |
316 | return err; | |
317 | } | |
318 | ||
69d6da0b | 319 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
1da177e4 | 320 | struct inet6_skb_parm *opt, |
d5fdd6ba | 321 | u8 type, u8 code, int offset, __be32 info) |
1da177e4 LT |
322 | { |
323 | struct inet_sock *inet = inet_sk(sk); | |
324 | struct ipv6_pinfo *np = inet6_sk(sk); | |
325 | int err; | |
326 | int harderr; | |
327 | ||
328 | /* Report error on raw socket, if: | |
329 | 1. User requested recverr. | |
330 | 2. Socket is connected (otherwise the error indication | |
331 | is useless without recverr and error is hard. | |
332 | */ | |
333 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
334 | return; | |
335 | ||
336 | harderr = icmpv6_err_convert(type, code, &err); | |
81aded24 DM |
337 | if (type == ICMPV6_PKT_TOOBIG) { |
338 | ip6_sk_update_pmtu(skb, sk, info); | |
1da177e4 | 339 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); |
81aded24 | 340 | } |
8d65b119 | 341 | if (type == NDISC_REDIRECT) { |
ec18d9a2 | 342 | ip6_sk_redirect(skb, sk); |
8d65b119 DJ |
343 | return; |
344 | } | |
1da177e4 LT |
345 | if (np->recverr) { |
346 | u8 *payload = skb->data; | |
347 | if (!inet->hdrincl) | |
348 | payload += offset; | |
349 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
350 | } | |
351 | ||
352 | if (np->recverr || harderr) { | |
353 | sk->sk_err = err; | |
354 | sk->sk_error_report(sk); | |
355 | } | |
356 | } | |
357 | ||
69d6da0b | 358 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
d5fdd6ba | 359 | u8 type, u8 code, int inner_offset, __be32 info) |
69d6da0b PE |
360 | { |
361 | struct sock *sk; | |
362 | int hash; | |
b71d1d42 | 363 | const struct in6_addr *saddr, *daddr; |
be185884 | 364 | struct net *net; |
69d6da0b | 365 | |
b673e4df | 366 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
69d6da0b | 367 | |
b673e4df PE |
368 | read_lock(&raw_v6_hashinfo.lock); |
369 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
53b24b8f | 370 | if (sk) { |
05f175cd | 371 | /* Note: ipv6_hdr(skb) != skb->data */ |
b71d1d42 | 372 | const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data; |
05f175cd YH |
373 | saddr = &ip6h->saddr; |
374 | daddr = &ip6h->daddr; | |
c346dca1 | 375 | net = dev_net(skb->dev); |
69d6da0b | 376 | |
be185884 | 377 | while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, |
4330487a | 378 | inet6_iif(skb)))) { |
69d6da0b PE |
379 | rawv6_err(sk, skb, NULL, type, code, |
380 | inner_offset, info); | |
381 | sk = sk_next(sk); | |
382 | } | |
383 | } | |
b673e4df | 384 | read_unlock(&raw_v6_hashinfo.lock); |
69d6da0b PE |
385 | } |
386 | ||
33d480ce | 387 | static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 | 388 | { |
33d480ce | 389 | if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) && |
fb286bb2 | 390 | skb_checksum_complete(skb)) { |
a92aa318 | 391 | atomic_inc(&sk->sk_drops); |
fb286bb2 | 392 | kfree_skb(skb); |
3cc76caa | 393 | return NET_RX_DROP; |
1da177e4 LT |
394 | } |
395 | ||
396 | /* Charge it to the socket. */ | |
d826eb14 ED |
397 | skb_dst_drop(skb); |
398 | if (sock_queue_rcv_skb(sk, skb) < 0) { | |
1da177e4 | 399 | kfree_skb(skb); |
3cc76caa | 400 | return NET_RX_DROP; |
1da177e4 LT |
401 | } |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | /* | |
1ab1457c | 407 | * This is next to useless... |
1da177e4 | 408 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
409 | * just to queue the skb... |
410 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
411 | * should call raw_rcv for demultiplexing |
412 | */ | |
413 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
414 | { | |
415 | struct inet_sock *inet = inet_sk(sk); | |
416 | struct raw6_sock *rp = raw6_sk(sk); | |
417 | ||
1ab1457c | 418 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
a92aa318 | 419 | atomic_inc(&sk->sk_drops); |
1ab1457c YH |
420 | kfree_skb(skb); |
421 | return NET_RX_DROP; | |
422 | } | |
1da177e4 LT |
423 | |
424 | if (!rp->checksum) | |
425 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
426 | ||
84fa7933 | 427 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 428 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 429 | skb_network_header_len(skb)); |
0660e03f ACM |
430 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
431 | &ipv6_hdr(skb)->daddr, | |
c720c7e8 | 432 | skb->len, inet->inet_num, skb->csum)) |
1da177e4 | 433 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 434 | } |
60476372 | 435 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
436 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
437 | &ipv6_hdr(skb)->daddr, | |
438 | skb->len, | |
c720c7e8 | 439 | inet->inet_num, 0)); |
1da177e4 LT |
440 | |
441 | if (inet->hdrincl) { | |
fb286bb2 | 442 | if (skb_checksum_complete(skb)) { |
a92aa318 | 443 | atomic_inc(&sk->sk_drops); |
1da177e4 | 444 | kfree_skb(skb); |
3cc76caa | 445 | return NET_RX_DROP; |
1da177e4 | 446 | } |
1da177e4 LT |
447 | } |
448 | ||
449 | rawv6_rcv_skb(sk, skb); | |
450 | return 0; | |
451 | } | |
452 | ||
453 | ||
454 | /* | |
455 | * This should be easy, if there is something there | |
456 | * we return it, otherwise we block. | |
457 | */ | |
458 | ||
1b784140 YX |
459 | static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
460 | int noblock, int flags, int *addr_len) | |
1da177e4 LT |
461 | { |
462 | struct ipv6_pinfo *np = inet6_sk(sk); | |
342dfc30 | 463 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); |
1da177e4 LT |
464 | struct sk_buff *skb; |
465 | size_t copied; | |
466 | int err; | |
467 | ||
468 | if (flags & MSG_OOB) | |
469 | return -EOPNOTSUPP; | |
1ab1457c | 470 | |
1da177e4 | 471 | if (flags & MSG_ERRQUEUE) |
85fbaa75 | 472 | return ipv6_recv_error(sk, msg, len, addr_len); |
1da177e4 | 473 | |
4b340ae2 | 474 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
85fbaa75 | 475 | return ipv6_recv_rxpmtu(sk, msg, len, addr_len); |
4b340ae2 | 476 | |
1da177e4 LT |
477 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
478 | if (!skb) | |
479 | goto out; | |
480 | ||
481 | copied = skb->len; | |
1ab1457c YH |
482 | if (copied > len) { |
483 | copied = len; | |
484 | msg->msg_flags |= MSG_TRUNC; | |
485 | } | |
1da177e4 | 486 | |
60476372 | 487 | if (skb_csum_unnecessary(skb)) { |
51f3d02b | 488 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 | 489 | } else if (msg->msg_flags&MSG_TRUNC) { |
fb286bb2 | 490 | if (__skb_checksum_complete(skb)) |
1da177e4 | 491 | goto csum_copy_err; |
51f3d02b | 492 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 | 493 | } else { |
227158db | 494 | err = skb_copy_and_csum_datagram_msg(skb, 0, msg); |
1da177e4 LT |
495 | if (err == -EINVAL) |
496 | goto csum_copy_err; | |
497 | } | |
498 | if (err) | |
499 | goto out_free; | |
500 | ||
501 | /* Copy the address. */ | |
502 | if (sin6) { | |
503 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 504 | sin6->sin6_port = 0; |
4e3fd7a0 | 505 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
1da177e4 | 506 | sin6->sin6_flowinfo = 0; |
842df073 | 507 | sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr, |
4330487a | 508 | inet6_iif(skb)); |
bceaa902 | 509 | *addr_len = sizeof(*sin6); |
1da177e4 LT |
510 | } |
511 | ||
3b885787 | 512 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
513 | |
514 | if (np->rxopt.all) | |
73df66f8 | 515 | ip6_datagram_recv_ctl(sk, msg, skb); |
1da177e4 LT |
516 | |
517 | err = copied; | |
518 | if (flags & MSG_TRUNC) | |
519 | err = skb->len; | |
520 | ||
521 | out_free: | |
522 | skb_free_datagram(sk, skb); | |
523 | out: | |
524 | return err; | |
525 | ||
526 | csum_copy_err: | |
3305b80c | 527 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
528 | |
529 | /* Error for blocking case is chosen to masquerade | |
530 | as some normal condition. | |
531 | */ | |
532 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
3305b80c | 533 | goto out; |
1da177e4 LT |
534 | } |
535 | ||
4c9483b2 | 536 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
357b40a1 | 537 | struct raw6_sock *rp) |
1da177e4 LT |
538 | { |
539 | struct sk_buff *skb; | |
540 | int err = 0; | |
357b40a1 HX |
541 | int offset; |
542 | int len; | |
679a8738 | 543 | int total_len; |
868c86bc AV |
544 | __wsum tmp_csum; |
545 | __sum16 csum; | |
1da177e4 LT |
546 | |
547 | if (!rp->checksum) | |
548 | goto send; | |
549 | ||
43728fa5 FF |
550 | skb = skb_peek(&sk->sk_write_queue); |
551 | if (!skb) | |
1da177e4 LT |
552 | goto out; |
553 | ||
357b40a1 | 554 | offset = rp->offset; |
299b0767 | 555 | total_len = inet_sk(sk)->cork.base.length; |
679a8738 | 556 | if (offset >= total_len - 1) { |
1da177e4 | 557 | err = -EINVAL; |
357b40a1 | 558 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
559 | goto out; |
560 | } | |
561 | ||
562 | /* should be check HW csum miyazawa */ | |
563 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
564 | /* | |
565 | * Only one fragment on the socket. | |
566 | */ | |
567 | tmp_csum = skb->csum; | |
568 | } else { | |
357b40a1 | 569 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
570 | tmp_csum = 0; |
571 | ||
572 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
573 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
574 | |
575 | if (csum_skb) | |
576 | continue; | |
577 | ||
ea2ae17d | 578 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
579 | if (offset >= len) { |
580 | offset -= len; | |
581 | continue; | |
582 | } | |
583 | ||
584 | csum_skb = skb; | |
1da177e4 | 585 | } |
357b40a1 HX |
586 | |
587 | skb = csum_skb; | |
1da177e4 LT |
588 | } |
589 | ||
ea2ae17d | 590 | offset += skb_transport_offset(skb); |
8242fc33 | 591 | BUG_ON(skb_copy_bits(skb, offset, &csum, 2)); |
357b40a1 | 592 | |
1da177e4 | 593 | /* in case cksum was not initialized */ |
357b40a1 | 594 | if (unlikely(csum)) |
5f92a738 | 595 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 596 | |
4c9483b2 DM |
597 | csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
598 | total_len, fl6->flowi6_proto, tmp_csum); | |
357b40a1 | 599 | |
4c9483b2 | 600 | if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP) |
f6ab0288 | 601 | csum = CSUM_MANGLED_0; |
1da177e4 | 602 | |
8242fc33 | 603 | BUG_ON(skb_store_bits(skb, offset, &csum, 2)); |
1da177e4 | 604 | |
1da177e4 LT |
605 | send: |
606 | err = ip6_push_pending_frames(sk); | |
607 | out: | |
608 | return err; | |
609 | } | |
610 | ||
c3c1a7db | 611 | static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length, |
4c9483b2 | 612 | struct flowi6 *fl6, struct dst_entry **dstp, |
1da177e4 LT |
613 | unsigned int flags) |
614 | { | |
3320da89 | 615 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
616 | struct ipv6hdr *iph; |
617 | struct sk_buff *skb; | |
1da177e4 | 618 | int err; |
1789a640 | 619 | struct rt6_info *rt = (struct rt6_info *)*dstp; |
a7ae1992 HX |
620 | int hlen = LL_RESERVED_SPACE(rt->dst.dev); |
621 | int tlen = rt->dst.dev->needed_tailroom; | |
1da177e4 | 622 | |
d8d1f30b | 623 | if (length > rt->dst.dev->mtu) { |
4c9483b2 | 624 | ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu); |
1da177e4 LT |
625 | return -EMSGSIZE; |
626 | } | |
627 | if (flags&MSG_PROBE) | |
628 | goto out; | |
629 | ||
f5184d26 | 630 | skb = sock_alloc_send_skb(sk, |
a7ae1992 | 631 | length + hlen + tlen + 15, |
f5184d26 | 632 | flags & MSG_DONTWAIT, &err); |
63159f29 | 633 | if (!skb) |
1ab1457c | 634 | goto error; |
a7ae1992 | 635 | skb_reserve(skb, hlen); |
1da177e4 | 636 | |
9c9c9ad5 | 637 | skb->protocol = htons(ETH_P_IPV6); |
1da177e4 | 638 | skb->priority = sk->sk_priority; |
4a19ec58 | 639 | skb->mark = sk->sk_mark; |
d8d1f30b | 640 | skb_dst_set(skb, &rt->dst); |
1789a640 | 641 | *dstp = NULL; |
1da177e4 | 642 | |
1ced98e8 ACM |
643 | skb_put(skb, length); |
644 | skb_reset_network_header(skb); | |
0660e03f | 645 | iph = ipv6_hdr(skb); |
1da177e4 LT |
646 | |
647 | skb->ip_summed = CHECKSUM_NONE; | |
648 | ||
b0e380b1 | 649 | skb->transport_header = skb->network_header; |
21226abb | 650 | err = memcpy_from_msg(iph, msg, length); |
1da177e4 LT |
651 | if (err) |
652 | goto error_fault; | |
653 | ||
edf391ff | 654 | IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); |
7026b1dd DM |
655 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, sk, skb, |
656 | NULL, rt->dst.dev, dst_output_sk); | |
1da177e4 | 657 | if (err > 0) |
6ce9e7b5 | 658 | err = net_xmit_errno(err); |
1da177e4 LT |
659 | if (err) |
660 | goto error; | |
661 | out: | |
662 | return 0; | |
663 | ||
664 | error_fault: | |
665 | err = -EFAULT; | |
666 | kfree_skb(skb); | |
667 | error: | |
3bd653c8 | 668 | IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
6ce9e7b5 ED |
669 | if (err == -ENOBUFS && !np->recverr) |
670 | err = 0; | |
1ab1457c | 671 | return err; |
1da177e4 LT |
672 | } |
673 | ||
19e3c66b AV |
674 | struct raw6_frag_vec { |
675 | struct msghdr *msg; | |
676 | int hlen; | |
677 | char c[4]; | |
678 | }; | |
679 | ||
680 | static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6) | |
1da177e4 | 681 | { |
19e3c66b AV |
682 | int err = 0; |
683 | switch (fl6->flowi6_proto) { | |
684 | case IPPROTO_ICMPV6: | |
685 | rfv->hlen = 2; | |
686 | err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen); | |
687 | if (!err) { | |
688 | fl6->fl6_icmp_type = rfv->c[0]; | |
689 | fl6->fl6_icmp_code = rfv->c[1]; | |
690 | } | |
691 | break; | |
692 | case IPPROTO_MH: | |
693 | rfv->hlen = 4; | |
694 | err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen); | |
695 | if (!err) | |
696 | fl6->fl6_mh_type = rfv->c[2]; | |
697 | } | |
698 | return err; | |
699 | } | |
1da177e4 | 700 | |
19e3c66b AV |
701 | static int raw6_getfrag(void *from, char *to, int offset, int len, int odd, |
702 | struct sk_buff *skb) | |
703 | { | |
704 | struct raw6_frag_vec *rfv = from; | |
705 | ||
706 | if (offset < rfv->hlen) { | |
707 | int copy = min(rfv->hlen - offset, len); | |
708 | ||
709 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
710 | memcpy(to, rfv->c + offset, copy); | |
711 | else | |
712 | skb->csum = csum_block_add( | |
713 | skb->csum, | |
714 | csum_partial_copy_nocheck(rfv->c + offset, | |
715 | to, copy, 0), | |
716 | odd); | |
717 | ||
718 | odd = 0; | |
719 | offset += copy; | |
720 | to += copy; | |
721 | len -= copy; | |
722 | ||
723 | if (!len) | |
724 | return 0; | |
725 | } | |
1da177e4 | 726 | |
19e3c66b | 727 | offset -= rfv->hlen; |
6e8f4d48 | 728 | |
f69e6d13 | 729 | return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb); |
1da177e4 LT |
730 | } |
731 | ||
1b784140 | 732 | static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) |
1da177e4 LT |
733 | { |
734 | struct ipv6_txoptions opt_space; | |
342dfc30 | 735 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); |
20c59de2 | 736 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
737 | struct inet_sock *inet = inet_sk(sk); |
738 | struct ipv6_pinfo *np = inet6_sk(sk); | |
739 | struct raw6_sock *rp = raw6_sk(sk); | |
740 | struct ipv6_txoptions *opt = NULL; | |
741 | struct ip6_flowlabel *flowlabel = NULL; | |
742 | struct dst_entry *dst = NULL; | |
19e3c66b | 743 | struct raw6_frag_vec rfv; |
4c9483b2 | 744 | struct flowi6 fl6; |
1da177e4 LT |
745 | int addr_len = msg->msg_namelen; |
746 | int hlimit = -1; | |
41a1f8ea | 747 | int tclass = -1; |
13b52cd4 | 748 | int dontfrag = -1; |
1da177e4 LT |
749 | u16 proto; |
750 | int err; | |
751 | ||
752 | /* Rough check on arithmetic overflow, | |
b59e139b | 753 | better check is made in ip6_append_data(). |
1da177e4 | 754 | */ |
b59e139b | 755 | if (len > INT_MAX) |
1da177e4 LT |
756 | return -EMSGSIZE; |
757 | ||
758 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 759 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
760 | return -EOPNOTSUPP; |
761 | ||
762 | /* | |
1ab1457c | 763 | * Get and verify the address. |
1da177e4 | 764 | */ |
4c9483b2 | 765 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 | 766 | |
4c9483b2 | 767 | fl6.flowi6_mark = sk->sk_mark; |
4a19ec58 | 768 | |
1da177e4 | 769 | if (sin6) { |
1ab1457c | 770 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
771 | return -EINVAL; |
772 | ||
1ab1457c | 773 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
a02cec21 | 774 | return -EAFNOSUPPORT; |
1da177e4 LT |
775 | |
776 | /* port is the proto value [0..255] carried in nexthdr */ | |
777 | proto = ntohs(sin6->sin6_port); | |
778 | ||
779 | if (!proto) | |
c720c7e8 ED |
780 | proto = inet->inet_num; |
781 | else if (proto != inet->inet_num) | |
a02cec21 | 782 | return -EINVAL; |
1da177e4 LT |
783 | |
784 | if (proto > 255) | |
a02cec21 | 785 | return -EINVAL; |
1da177e4 LT |
786 | |
787 | daddr = &sin6->sin6_addr; | |
788 | if (np->sndflow) { | |
4c9483b2 DM |
789 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
790 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
791 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
63159f29 | 792 | if (!flowlabel) |
1da177e4 | 793 | return -EINVAL; |
1da177e4 LT |
794 | } |
795 | } | |
796 | ||
797 | /* | |
798 | * Otherwise it will be difficult to maintain | |
799 | * sk->sk_dst_cache. | |
800 | */ | |
801 | if (sk->sk_state == TCP_ESTABLISHED && | |
efe4208f ED |
802 | ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) |
803 | daddr = &sk->sk_v6_daddr; | |
1da177e4 LT |
804 | |
805 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
806 | sin6->sin6_scope_id && | |
842df073 | 807 | __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) |
4c9483b2 | 808 | fl6.flowi6_oif = sin6->sin6_scope_id; |
1da177e4 | 809 | } else { |
1ab1457c | 810 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 811 | return -EDESTADDRREQ; |
1ab1457c | 812 | |
c720c7e8 | 813 | proto = inet->inet_num; |
efe4208f | 814 | daddr = &sk->sk_v6_daddr; |
4c9483b2 | 815 | fl6.flowlabel = np->flow_label; |
1da177e4 LT |
816 | } |
817 | ||
4c9483b2 DM |
818 | if (fl6.flowi6_oif == 0) |
819 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
820 | |
821 | if (msg->msg_controllen) { | |
822 | opt = &opt_space; | |
823 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
824 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
825 | ||
73df66f8 TP |
826 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, |
827 | &hlimit, &tclass, &dontfrag); | |
1da177e4 LT |
828 | if (err < 0) { |
829 | fl6_sock_release(flowlabel); | |
830 | return err; | |
831 | } | |
4c9483b2 DM |
832 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
833 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
63159f29 | 834 | if (!flowlabel) |
1da177e4 LT |
835 | return -EINVAL; |
836 | } | |
837 | if (!(opt->opt_nflen|opt->opt_flen)) | |
838 | opt = NULL; | |
839 | } | |
63159f29 | 840 | if (!opt) |
1da177e4 | 841 | opt = np->opt; |
df9890c3 YH |
842 | if (flowlabel) |
843 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
844 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 845 | |
4c9483b2 | 846 | fl6.flowi6_proto = proto; |
19e3c66b AV |
847 | rfv.msg = msg; |
848 | rfv.hlen = 0; | |
849 | err = rawv6_probe_proto_opt(&rfv, &fl6); | |
a27b58fe HC |
850 | if (err) |
851 | goto out; | |
1ab1457c | 852 | |
876c7f41 | 853 | if (!ipv6_addr_any(daddr)) |
4e3fd7a0 | 854 | fl6.daddr = *daddr; |
876c7f41 | 855 | else |
4c9483b2 DM |
856 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
857 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
4e3fd7a0 | 858 | fl6.saddr = np->saddr; |
1da177e4 | 859 | |
4c9483b2 | 860 | final_p = fl6_update_dst(&fl6, opt, &final); |
1da177e4 | 861 | |
4c9483b2 DM |
862 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) |
863 | fl6.flowi6_oif = np->mcast_oif; | |
c4062dfc EH |
864 | else if (!fl6.flowi6_oif) |
865 | fl6.flowi6_oif = np->ucast_oif; | |
4c9483b2 | 866 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
1da177e4 | 867 | |
48e8aa6e MKL |
868 | if (inet->hdrincl) |
869 | fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH; | |
870 | ||
0e0d44ab | 871 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p); |
68d0c6d3 DM |
872 | if (IS_ERR(dst)) { |
873 | err = PTR_ERR(dst); | |
1da177e4 | 874 | goto out; |
14e50e57 | 875 | } |
5c98631c LC |
876 | if (hlimit < 0) |
877 | hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); | |
1da177e4 | 878 | |
e651f03a | 879 | if (tclass < 0) |
e012d51c | 880 | tclass = np->tclass; |
41a1f8ea | 881 | |
13b52cd4 BH |
882 | if (dontfrag < 0) |
883 | dontfrag = np->dontfrag; | |
884 | ||
1da177e4 LT |
885 | if (msg->msg_flags&MSG_CONFIRM) |
886 | goto do_confirm; | |
887 | ||
888 | back_from_confirm: | |
1789a640 | 889 | if (inet->hdrincl) |
c3c1a7db | 890 | err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst, msg->msg_flags); |
1789a640 | 891 | else { |
1da177e4 | 892 | lock_sock(sk); |
19e3c66b | 893 | err = ip6_append_data(sk, raw6_getfrag, &rfv, |
67ba4152 | 894 | len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info *)dst, |
13b52cd4 | 895 | msg->msg_flags, dontfrag); |
1da177e4 LT |
896 | |
897 | if (err) | |
898 | ip6_flush_pending_frames(sk); | |
899 | else if (!(msg->msg_flags & MSG_MORE)) | |
4c9483b2 | 900 | err = rawv6_push_pending_frames(sk, &fl6, rp); |
3ef9d943 | 901 | release_sock(sk); |
1da177e4 LT |
902 | } |
903 | done: | |
6d3e85ec | 904 | dst_release(dst); |
1ab1457c | 905 | out: |
1da177e4 | 906 | fl6_sock_release(flowlabel); |
67ba4152 | 907 | return err < 0 ? err : len; |
1da177e4 LT |
908 | do_confirm: |
909 | dst_confirm(dst); | |
910 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
911 | goto back_from_confirm; | |
912 | err = 0; | |
913 | goto done; | |
914 | } | |
915 | ||
1ab1457c | 916 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
917 | char __user *optval, int optlen) |
918 | { | |
919 | switch (optname) { | |
920 | case ICMPV6_FILTER: | |
921 | if (optlen > sizeof(struct icmp6_filter)) | |
922 | optlen = sizeof(struct icmp6_filter); | |
923 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
924 | return -EFAULT; | |
925 | return 0; | |
926 | default: | |
927 | return -ENOPROTOOPT; | |
3ff50b79 | 928 | } |
1da177e4 LT |
929 | |
930 | return 0; | |
931 | } | |
932 | ||
1ab1457c | 933 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
934 | char __user *optval, int __user *optlen) |
935 | { | |
936 | int len; | |
937 | ||
938 | switch (optname) { | |
939 | case ICMPV6_FILTER: | |
940 | if (get_user(len, optlen)) | |
941 | return -EFAULT; | |
942 | if (len < 0) | |
943 | return -EINVAL; | |
944 | if (len > sizeof(struct icmp6_filter)) | |
945 | len = sizeof(struct icmp6_filter); | |
946 | if (put_user(len, optlen)) | |
947 | return -EFAULT; | |
948 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
949 | return -EFAULT; | |
950 | return 0; | |
951 | default: | |
952 | return -ENOPROTOOPT; | |
3ff50b79 | 953 | } |
1da177e4 LT |
954 | |
955 | return 0; | |
956 | } | |
957 | ||
958 | ||
3fdadf7d | 959 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 960 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
961 | { |
962 | struct raw6_sock *rp = raw6_sk(sk); | |
963 | int val; | |
964 | ||
1ab1457c | 965 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
966 | return -EFAULT; |
967 | ||
968 | switch (optname) { | |
207ec0ab JP |
969 | case IPV6_CHECKSUM: |
970 | if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 && | |
971 | level == IPPROTO_IPV6) { | |
972 | /* | |
973 | * RFC3542 tells that IPV6_CHECKSUM socket | |
974 | * option in the IPPROTO_IPV6 level is not | |
975 | * allowed on ICMPv6 sockets. | |
976 | * If you want to set it, use IPPROTO_RAW | |
977 | * level IPV6_CHECKSUM socket option | |
978 | * (Linux extension). | |
979 | */ | |
980 | return -EINVAL; | |
981 | } | |
1a98d05f | 982 | |
207ec0ab JP |
983 | /* You may get strange result with a positive odd offset; |
984 | RFC2292bis agrees with me. */ | |
985 | if (val > 0 && (val&1)) | |
986 | return -EINVAL; | |
987 | if (val < 0) { | |
988 | rp->checksum = 0; | |
989 | } else { | |
990 | rp->checksum = 1; | |
991 | rp->offset = val; | |
992 | } | |
1da177e4 | 993 | |
207ec0ab | 994 | return 0; |
1da177e4 | 995 | |
207ec0ab JP |
996 | default: |
997 | return -ENOPROTOOPT; | |
1da177e4 LT |
998 | } |
999 | } | |
1000 | ||
3fdadf7d | 1001 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1002 | char __user *optval, unsigned int optlen) |
1da177e4 | 1003 | { |
207ec0ab JP |
1004 | switch (level) { |
1005 | case SOL_RAW: | |
1006 | break; | |
1da177e4 | 1007 | |
207ec0ab JP |
1008 | case SOL_ICMPV6: |
1009 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1010 | return -EOPNOTSUPP; | |
1011 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1012 | case SOL_IPV6: | |
1013 | if (optname == IPV6_CHECKSUM) | |
1014 | break; | |
1015 | default: | |
1016 | return ipv6_setsockopt(sk, level, optname, optval, optlen); | |
3ff50b79 SH |
1017 | } |
1018 | ||
3fdadf7d DM |
1019 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1020 | } | |
1021 | ||
1022 | #ifdef CONFIG_COMPAT | |
1023 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 1024 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1025 | { |
543d9cfe ACM |
1026 | switch (level) { |
1027 | case SOL_RAW: | |
1028 | break; | |
1029 | case SOL_ICMPV6: | |
c720c7e8 | 1030 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
543d9cfe ACM |
1031 | return -EOPNOTSUPP; |
1032 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1033 | case SOL_IPV6: | |
1034 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1035 | break; |
543d9cfe ACM |
1036 | default: |
1037 | return compat_ipv6_setsockopt(sk, level, optname, | |
1038 | optval, optlen); | |
3ff50b79 | 1039 | } |
3fdadf7d DM |
1040 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1041 | } | |
1042 | #endif | |
1043 | ||
1044 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1045 | char __user *optval, int __user *optlen) | |
1046 | { | |
1047 | struct raw6_sock *rp = raw6_sk(sk); | |
1048 | int val, len; | |
1da177e4 | 1049 | |
67ba4152 | 1050 | if (get_user(len, optlen)) |
1da177e4 LT |
1051 | return -EFAULT; |
1052 | ||
1053 | switch (optname) { | |
1054 | case IPV6_CHECKSUM: | |
1a98d05f YH |
1055 | /* |
1056 | * We allow getsockopt() for IPPROTO_IPV6-level | |
1057 | * IPV6_CHECKSUM socket option on ICMPv6 sockets | |
1058 | * since RFC3542 is silent about it. | |
1059 | */ | |
1da177e4 LT |
1060 | if (rp->checksum == 0) |
1061 | val = -1; | |
1062 | else | |
1063 | val = rp->offset; | |
1064 | break; | |
1065 | ||
1066 | default: | |
1067 | return -ENOPROTOOPT; | |
1068 | } | |
1069 | ||
1070 | len = min_t(unsigned int, sizeof(int), len); | |
1071 | ||
1072 | if (put_user(len, optlen)) | |
1073 | return -EFAULT; | |
67ba4152 | 1074 | if (copy_to_user(optval, &val, len)) |
1da177e4 LT |
1075 | return -EFAULT; |
1076 | return 0; | |
1077 | } | |
1078 | ||
3fdadf7d DM |
1079 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1080 | char __user *optval, int __user *optlen) | |
1081 | { | |
207ec0ab JP |
1082 | switch (level) { |
1083 | case SOL_RAW: | |
1084 | break; | |
3fdadf7d | 1085 | |
207ec0ab JP |
1086 | case SOL_ICMPV6: |
1087 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1088 | return -EOPNOTSUPP; | |
1089 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1090 | case SOL_IPV6: | |
1091 | if (optname == IPV6_CHECKSUM) | |
1092 | break; | |
1093 | default: | |
1094 | return ipv6_getsockopt(sk, level, optname, optval, optlen); | |
3ff50b79 SH |
1095 | } |
1096 | ||
3fdadf7d DM |
1097 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1098 | } | |
1099 | ||
1100 | #ifdef CONFIG_COMPAT | |
1101 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1102 | char __user *optval, int __user *optlen) |
3fdadf7d | 1103 | { |
543d9cfe ACM |
1104 | switch (level) { |
1105 | case SOL_RAW: | |
1106 | break; | |
1107 | case SOL_ICMPV6: | |
c720c7e8 | 1108 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
543d9cfe ACM |
1109 | return -EOPNOTSUPP; |
1110 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1111 | case SOL_IPV6: | |
1112 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1113 | break; |
543d9cfe ACM |
1114 | default: |
1115 | return compat_ipv6_getsockopt(sk, level, optname, | |
1116 | optval, optlen); | |
3ff50b79 | 1117 | } |
3fdadf7d DM |
1118 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1119 | } | |
1120 | #endif | |
1121 | ||
1da177e4 LT |
1122 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1123 | { | |
207ec0ab JP |
1124 | switch (cmd) { |
1125 | case SIOCOUTQ: { | |
1126 | int amount = sk_wmem_alloc_get(sk); | |
31e6d363 | 1127 | |
207ec0ab JP |
1128 | return put_user(amount, (int __user *)arg); |
1129 | } | |
1130 | case SIOCINQ: { | |
1131 | struct sk_buff *skb; | |
1132 | int amount = 0; | |
1133 | ||
1134 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
1135 | skb = skb_peek(&sk->sk_receive_queue); | |
53b24b8f | 1136 | if (skb) |
29a3cad5 SH |
1137 | amount = skb_tail_pointer(skb) - |
1138 | skb_transport_header(skb); | |
207ec0ab JP |
1139 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1140 | return put_user(amount, (int __user *)arg); | |
1141 | } | |
1da177e4 | 1142 | |
207ec0ab | 1143 | default: |
7bc570c8 | 1144 | #ifdef CONFIG_IPV6_MROUTE |
207ec0ab | 1145 | return ip6mr_ioctl(sk, cmd, (void __user *)arg); |
7bc570c8 | 1146 | #else |
207ec0ab | 1147 | return -ENOIOCTLCMD; |
7bc570c8 | 1148 | #endif |
1da177e4 LT |
1149 | } |
1150 | } | |
1151 | ||
e2d57766 DM |
1152 | #ifdef CONFIG_COMPAT |
1153 | static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) | |
1154 | { | |
1155 | switch (cmd) { | |
1156 | case SIOCOUTQ: | |
1157 | case SIOCINQ: | |
1158 | return -ENOIOCTLCMD; | |
1159 | default: | |
1160 | #ifdef CONFIG_IPV6_MROUTE | |
1161 | return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg)); | |
1162 | #else | |
1163 | return -ENOIOCTLCMD; | |
1164 | #endif | |
1165 | } | |
1166 | } | |
1167 | #endif | |
1168 | ||
1da177e4 LT |
1169 | static void rawv6_close(struct sock *sk, long timeout) |
1170 | { | |
c720c7e8 | 1171 | if (inet_sk(sk)->inet_num == IPPROTO_RAW) |
725a8ff0 | 1172 | ip6_ra_control(sk, -1); |
7bc570c8 | 1173 | ip6mr_sk_done(sk); |
1da177e4 LT |
1174 | sk_common_release(sk); |
1175 | } | |
1176 | ||
7d06b2e0 | 1177 | static void raw6_destroy(struct sock *sk) |
22dd4850 DL |
1178 | { |
1179 | lock_sock(sk); | |
1180 | ip6_flush_pending_frames(sk); | |
1181 | release_sock(sk); | |
f23d60de | 1182 | |
7d06b2e0 | 1183 | inet6_destroy_sock(sk); |
22dd4850 DL |
1184 | } |
1185 | ||
1da177e4 LT |
1186 | static int rawv6_init_sk(struct sock *sk) |
1187 | { | |
f48d5ff1 MN |
1188 | struct raw6_sock *rp = raw6_sk(sk); |
1189 | ||
c720c7e8 | 1190 | switch (inet_sk(sk)->inet_num) { |
f48d5ff1 | 1191 | case IPPROTO_ICMPV6: |
1da177e4 LT |
1192 | rp->checksum = 1; |
1193 | rp->offset = 2; | |
f48d5ff1 MN |
1194 | break; |
1195 | case IPPROTO_MH: | |
1196 | rp->checksum = 1; | |
1197 | rp->offset = 4; | |
1198 | break; | |
1199 | default: | |
1200 | break; | |
1da177e4 | 1201 | } |
a02cec21 | 1202 | return 0; |
1da177e4 LT |
1203 | } |
1204 | ||
1205 | struct proto rawv6_prot = { | |
543d9cfe ACM |
1206 | .name = "RAWv6", |
1207 | .owner = THIS_MODULE, | |
1208 | .close = rawv6_close, | |
22dd4850 | 1209 | .destroy = raw6_destroy, |
82b276cd | 1210 | .connect = ip6_datagram_connect_v6_only, |
543d9cfe ACM |
1211 | .disconnect = udp_disconnect, |
1212 | .ioctl = rawv6_ioctl, | |
1213 | .init = rawv6_init_sk, | |
543d9cfe ACM |
1214 | .setsockopt = rawv6_setsockopt, |
1215 | .getsockopt = rawv6_getsockopt, | |
1216 | .sendmsg = rawv6_sendmsg, | |
1217 | .recvmsg = rawv6_recvmsg, | |
1218 | .bind = rawv6_bind, | |
1219 | .backlog_rcv = rawv6_rcv_skb, | |
fc8717ba PE |
1220 | .hash = raw_hash_sk, |
1221 | .unhash = raw_unhash_sk, | |
543d9cfe | 1222 | .obj_size = sizeof(struct raw6_sock), |
fc8717ba | 1223 | .h.raw_hash = &raw_v6_hashinfo, |
3fdadf7d | 1224 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1225 | .compat_setsockopt = compat_rawv6_setsockopt, |
1226 | .compat_getsockopt = compat_rawv6_getsockopt, | |
e2d57766 | 1227 | .compat_ioctl = compat_rawv6_ioctl, |
3fdadf7d | 1228 | #endif |
1da177e4 LT |
1229 | }; |
1230 | ||
1231 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
1232 | static int raw6_seq_show(struct seq_file *seq, void *v) |
1233 | { | |
17ef66af LC |
1234 | if (v == SEQ_START_TOKEN) { |
1235 | seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); | |
1236 | } else { | |
1237 | struct sock *sp = v; | |
1238 | __u16 srcp = inet_sk(sp)->inet_num; | |
1239 | ip6_dgram_sock_seq_show(seq, v, srcp, 0, | |
1240 | raw_seq_private(seq)->bucket); | |
1241 | } | |
1da177e4 LT |
1242 | return 0; |
1243 | } | |
1244 | ||
56b3d975 | 1245 | static const struct seq_operations raw6_seq_ops = { |
42a73808 PE |
1246 | .start = raw_seq_start, |
1247 | .next = raw_seq_next, | |
1248 | .stop = raw_seq_stop, | |
1da177e4 LT |
1249 | .show = raw6_seq_show, |
1250 | }; | |
1251 | ||
1252 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1253 | { | |
3046d767 | 1254 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); |
1da177e4 LT |
1255 | } |
1256 | ||
9a32144e | 1257 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1258 | .owner = THIS_MODULE, |
1259 | .open = raw6_seq_open, | |
1260 | .read = seq_read, | |
1261 | .llseek = seq_lseek, | |
f51d599f | 1262 | .release = seq_release_net, |
1da177e4 LT |
1263 | }; |
1264 | ||
2c8c1e72 | 1265 | static int __net_init raw6_init_net(struct net *net) |
1da177e4 | 1266 | { |
d4beaa66 | 1267 | if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops)) |
1da177e4 | 1268 | return -ENOMEM; |
a308da16 | 1269 | |
1da177e4 LT |
1270 | return 0; |
1271 | } | |
1272 | ||
2c8c1e72 | 1273 | static void __net_exit raw6_exit_net(struct net *net) |
a308da16 | 1274 | { |
ece31ffd | 1275 | remove_proc_entry("raw6", net->proc_net); |
a308da16 PE |
1276 | } |
1277 | ||
1278 | static struct pernet_operations raw6_net_ops = { | |
1279 | .init = raw6_init_net, | |
1280 | .exit = raw6_exit_net, | |
1281 | }; | |
1282 | ||
1283 | int __init raw6_proc_init(void) | |
1284 | { | |
1285 | return register_pernet_subsys(&raw6_net_ops); | |
1286 | } | |
1287 | ||
1da177e4 LT |
1288 | void raw6_proc_exit(void) |
1289 | { | |
a308da16 | 1290 | unregister_pernet_subsys(&raw6_net_ops); |
1da177e4 LT |
1291 | } |
1292 | #endif /* CONFIG_PROC_FS */ | |
7f4e4868 DL |
1293 | |
1294 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1295 | static const struct proto_ops inet6_sockraw_ops = { | |
1296 | .family = PF_INET6, | |
1297 | .owner = THIS_MODULE, | |
1298 | .release = inet6_release, | |
1299 | .bind = inet6_bind, | |
1300 | .connect = inet_dgram_connect, /* ok */ | |
1301 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1302 | .accept = sock_no_accept, /* a do nothing */ | |
1303 | .getname = inet6_getname, | |
1304 | .poll = datagram_poll, /* ok */ | |
1305 | .ioctl = inet6_ioctl, /* must change */ | |
1306 | .listen = sock_no_listen, /* ok */ | |
1307 | .shutdown = inet_shutdown, /* ok */ | |
1308 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1309 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1310 | .sendmsg = inet_sendmsg, /* ok */ | |
1311 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1312 | .mmap = sock_no_mmap, | |
1313 | .sendpage = sock_no_sendpage, | |
1314 | #ifdef CONFIG_COMPAT | |
1315 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1316 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1317 | #endif | |
1318 | }; | |
1319 | ||
1320 | static struct inet_protosw rawv6_protosw = { | |
1321 | .type = SOCK_RAW, | |
1322 | .protocol = IPPROTO_IP, /* wild card */ | |
1323 | .prot = &rawv6_prot, | |
1324 | .ops = &inet6_sockraw_ops, | |
7f4e4868 DL |
1325 | .flags = INET_PROTOSW_REUSE, |
1326 | }; | |
1327 | ||
1328 | int __init rawv6_init(void) | |
1329 | { | |
3d2f6d41 | 1330 | return inet6_register_protosw(&rawv6_protosw); |
7f4e4868 DL |
1331 | } |
1332 | ||
09f7709f | 1333 | void rawv6_exit(void) |
7f4e4868 DL |
1334 | { |
1335 | inet6_unregister_protosw(&rawv6_protosw); | |
1336 | } |