Commit | Line | Data |
---|---|---|
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> |
1da177e4 LT |
35 | #include <asm/uaccess.h> |
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 LT |
80 | struct ipv6_pinfo *np = inet6_sk(sk); |
81 | ||
878628fb | 82 | if (!net_eq(sock_net(sk), net)) |
be185884 PE |
83 | continue; |
84 | ||
1da177e4 LT |
85 | if (!ipv6_addr_any(&np->daddr) && |
86 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
87 | continue; | |
88 | ||
0bd1b59b AM |
89 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
90 | continue; | |
91 | ||
1da177e4 LT |
92 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
93 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
94 | goto found; | |
95 | if (is_multicast && | |
96 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
97 | goto found; | |
98 | continue; | |
99 | } | |
100 | goto found; | |
101 | } | |
102 | sk = NULL; | |
103 | found: | |
104 | return sk; | |
105 | } | |
106 | ||
107 | /* | |
108 | * 0 - deliver | |
109 | * 1 - block | |
110 | */ | |
1b05c4b5 | 111 | static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb) |
1da177e4 | 112 | { |
9cc08af3 | 113 | struct icmp6hdr _hdr; |
1b05c4b5 | 114 | const struct icmp6hdr *hdr; |
1da177e4 | 115 | |
d1c53c8e WA |
116 | /* We require only the four bytes of the ICMPv6 header, not any |
117 | * additional bytes of message body in "struct icmp6hdr". | |
118 | */ | |
1b05c4b5 | 119 | hdr = skb_header_pointer(skb, skb_transport_offset(skb), |
d1c53c8e | 120 | ICMPV6_HDRLEN, &_hdr); |
1b05c4b5 ED |
121 | if (hdr) { |
122 | const __u32 *data = &raw6_sk(sk)->filter.data[0]; | |
123 | unsigned int type = hdr->icmp6_type; | |
1da177e4 | 124 | |
1b05c4b5 | 125 | return (data[type >> 5] & (1U << (type & 31))) != 0; |
1da177e4 | 126 | } |
1b05c4b5 | 127 | return 1; |
1da177e4 LT |
128 | } |
129 | ||
07a93626 | 130 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
f2eda47d | 131 | typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb); |
59fbb3a6 | 132 | |
f2eda47d ED |
133 | static mh_filter_t __rcu *mh_filter __read_mostly; |
134 | ||
135 | int rawv6_mh_filter_register(mh_filter_t filter) | |
59fbb3a6 | 136 | { |
cf778b00 | 137 | rcu_assign_pointer(mh_filter, filter); |
59fbb3a6 MN |
138 | return 0; |
139 | } | |
140 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
141 | ||
f2eda47d | 142 | int rawv6_mh_filter_unregister(mh_filter_t filter) |
59fbb3a6 | 143 | { |
a9b3cd7f | 144 | RCU_INIT_POINTER(mh_filter, NULL); |
59fbb3a6 MN |
145 | synchronize_rcu(); |
146 | return 0; | |
147 | } | |
148 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
149 | ||
150 | #endif | |
151 | ||
1da177e4 LT |
152 | /* |
153 | * demultiplex raw sockets. | |
154 | * (should consider queueing the skb in the sock receive_queue | |
155 | * without calling rawv6.c) | |
156 | * | |
157 | * Caller owns SKB so we must make clones. | |
158 | */ | |
a50feda5 | 159 | static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 | 160 | { |
b71d1d42 ED |
161 | const struct in6_addr *saddr; |
162 | const struct in6_addr *daddr; | |
1da177e4 | 163 | struct sock *sk; |
a50feda5 | 164 | bool delivered = false; |
1da177e4 | 165 | __u8 hash; |
be185884 | 166 | struct net *net; |
1da177e4 | 167 | |
0660e03f | 168 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
169 | daddr = saddr + 1; |
170 | ||
f9242b6b | 171 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
1da177e4 | 172 | |
b673e4df PE |
173 | read_lock(&raw_v6_hashinfo.lock); |
174 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 | 175 | |
1da177e4 LT |
176 | if (sk == NULL) |
177 | goto out; | |
178 | ||
c346dca1 | 179 | net = dev_net(skb->dev); |
be185884 | 180 | sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
181 | |
182 | while (sk) { | |
7be96f76 MN |
183 | int filtered; |
184 | ||
a50feda5 | 185 | delivered = true; |
7be96f76 MN |
186 | switch (nexthdr) { |
187 | case IPPROTO_ICMPV6: | |
188 | filtered = icmpv6_filter(sk, skb); | |
189 | break; | |
59fbb3a6 | 190 | |
07a93626 | 191 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
7be96f76 | 192 | case IPPROTO_MH: |
59fbb3a6 | 193 | { |
7be96f76 MN |
194 | /* XXX: To validate MH only once for each packet, |
195 | * this is placed here. It should be after checking | |
196 | * xfrm policy, however it doesn't. The checking xfrm | |
197 | * policy is placed in rawv6_rcv() because it is | |
198 | * required for each socket. | |
199 | */ | |
f2eda47d | 200 | mh_filter_t *filter; |
59fbb3a6 MN |
201 | |
202 | filter = rcu_dereference(mh_filter); | |
f2eda47d | 203 | filtered = filter ? (*filter)(sk, skb) : 0; |
7be96f76 | 204 | break; |
59fbb3a6 | 205 | } |
7be96f76 MN |
206 | #endif |
207 | default: | |
208 | filtered = 0; | |
209 | break; | |
210 | } | |
211 | ||
212 | if (filtered < 0) | |
213 | break; | |
214 | if (filtered == 0) { | |
1da177e4 LT |
215 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
216 | ||
217 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
218 | if (clone) { |
219 | nf_reset(clone); | |
1da177e4 | 220 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 221 | } |
1da177e4 | 222 | } |
be185884 | 223 | sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 224 | IP6CB(skb)->iif); |
1da177e4 LT |
225 | } |
226 | out: | |
b673e4df | 227 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 228 | return delivered; |
1da177e4 LT |
229 | } |
230 | ||
a50feda5 | 231 | bool raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
69d6da0b PE |
232 | { |
233 | struct sock *raw_sk; | |
234 | ||
f9242b6b | 235 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]); |
69d6da0b PE |
236 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
237 | raw_sk = NULL; | |
238 | ||
239 | return raw_sk != NULL; | |
240 | } | |
241 | ||
1da177e4 LT |
242 | /* This cleans up af_inet6 a bit. -DaveM */ |
243 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
244 | { | |
245 | struct inet_sock *inet = inet_sk(sk); | |
246 | struct ipv6_pinfo *np = inet6_sk(sk); | |
247 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 248 | __be32 v4addr = 0; |
1da177e4 LT |
249 | int addr_type; |
250 | int err; | |
251 | ||
252 | if (addr_len < SIN6_LEN_RFC2133) | |
253 | return -EINVAL; | |
254 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
255 | ||
256 | /* Raw sockets are IPv6 only */ | |
257 | if (addr_type == IPV6_ADDR_MAPPED) | |
fd5c0027 | 258 | return -EADDRNOTAVAIL; |
1da177e4 LT |
259 | |
260 | lock_sock(sk); | |
261 | ||
262 | err = -EINVAL; | |
263 | if (sk->sk_state != TCP_CLOSE) | |
264 | goto out; | |
265 | ||
fd5c0027 | 266 | rcu_read_lock(); |
1da177e4 LT |
267 | /* Check if the address belongs to the host. */ |
268 | if (addr_type != IPV6_ADDR_ANY) { | |
269 | struct net_device *dev = NULL; | |
270 | ||
842df073 | 271 | if (__ipv6_addr_needs_scope_id(addr_type)) { |
1da177e4 LT |
272 | if (addr_len >= sizeof(struct sockaddr_in6) && |
273 | addr->sin6_scope_id) { | |
274 | /* Override any existing binding, if another | |
275 | * one is supplied by user. | |
276 | */ | |
277 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
278 | } | |
1ab1457c | 279 | |
1da177e4 LT |
280 | /* Binding to link-local address requires an interface */ |
281 | if (!sk->sk_bound_dev_if) | |
fd5c0027 | 282 | goto out_unlock; |
1da177e4 | 283 | |
fd5c0027 ED |
284 | err = -ENODEV; |
285 | dev = dev_get_by_index_rcu(sock_net(sk), | |
286 | sk->sk_bound_dev_if); | |
287 | if (!dev) | |
288 | goto out_unlock; | |
1da177e4 | 289 | } |
1ab1457c | 290 | |
1da177e4 LT |
291 | /* ipv4 addr of the socket is invalid. Only the |
292 | * unspecified and mapped address have a v4 equivalent. | |
293 | */ | |
294 | v4addr = LOOPBACK4_IPV6; | |
295 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
296 | err = -EADDRNOTAVAIL; | |
3b1e0a65 | 297 | if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, |
bfeade08 | 298 | dev, 0)) { |
fd5c0027 | 299 | goto out_unlock; |
1da177e4 LT |
300 | } |
301 | } | |
1da177e4 LT |
302 | } |
303 | ||
c720c7e8 | 304 | inet->inet_rcv_saddr = inet->inet_saddr = v4addr; |
4e3fd7a0 | 305 | np->rcv_saddr = addr->sin6_addr; |
1da177e4 | 306 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
4e3fd7a0 | 307 | np->saddr = addr->sin6_addr; |
1da177e4 | 308 | err = 0; |
fd5c0027 ED |
309 | out_unlock: |
310 | rcu_read_unlock(); | |
1da177e4 LT |
311 | out: |
312 | release_sock(sk); | |
313 | return err; | |
314 | } | |
315 | ||
69d6da0b | 316 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
1da177e4 | 317 | struct inet6_skb_parm *opt, |
d5fdd6ba | 318 | u8 type, u8 code, int offset, __be32 info) |
1da177e4 LT |
319 | { |
320 | struct inet_sock *inet = inet_sk(sk); | |
321 | struct ipv6_pinfo *np = inet6_sk(sk); | |
322 | int err; | |
323 | int harderr; | |
324 | ||
325 | /* Report error on raw socket, if: | |
326 | 1. User requested recverr. | |
327 | 2. Socket is connected (otherwise the error indication | |
328 | is useless without recverr and error is hard. | |
329 | */ | |
330 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
331 | return; | |
332 | ||
333 | harderr = icmpv6_err_convert(type, code, &err); | |
81aded24 DM |
334 | if (type == ICMPV6_PKT_TOOBIG) { |
335 | ip6_sk_update_pmtu(skb, sk, info); | |
1da177e4 | 336 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); |
81aded24 | 337 | } |
ec18d9a2 DM |
338 | if (type == NDISC_REDIRECT) |
339 | ip6_sk_redirect(skb, sk); | |
1da177e4 LT |
340 | if (np->recverr) { |
341 | u8 *payload = skb->data; | |
342 | if (!inet->hdrincl) | |
343 | payload += offset; | |
344 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
345 | } | |
346 | ||
347 | if (np->recverr || harderr) { | |
348 | sk->sk_err = err; | |
349 | sk->sk_error_report(sk); | |
350 | } | |
351 | } | |
352 | ||
69d6da0b | 353 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
d5fdd6ba | 354 | u8 type, u8 code, int inner_offset, __be32 info) |
69d6da0b PE |
355 | { |
356 | struct sock *sk; | |
357 | int hash; | |
b71d1d42 | 358 | const struct in6_addr *saddr, *daddr; |
be185884 | 359 | struct net *net; |
69d6da0b | 360 | |
b673e4df | 361 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
69d6da0b | 362 | |
b673e4df PE |
363 | read_lock(&raw_v6_hashinfo.lock); |
364 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
69d6da0b | 365 | if (sk != NULL) { |
05f175cd | 366 | /* Note: ipv6_hdr(skb) != skb->data */ |
b71d1d42 | 367 | const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data; |
05f175cd YH |
368 | saddr = &ip6h->saddr; |
369 | daddr = &ip6h->daddr; | |
c346dca1 | 370 | net = dev_net(skb->dev); |
69d6da0b | 371 | |
be185884 | 372 | while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, |
69d6da0b PE |
373 | IP6CB(skb)->iif))) { |
374 | rawv6_err(sk, skb, NULL, type, code, | |
375 | inner_offset, info); | |
376 | sk = sk_next(sk); | |
377 | } | |
378 | } | |
b673e4df | 379 | read_unlock(&raw_v6_hashinfo.lock); |
69d6da0b PE |
380 | } |
381 | ||
33d480ce | 382 | static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 | 383 | { |
33d480ce | 384 | if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) && |
fb286bb2 | 385 | skb_checksum_complete(skb)) { |
a92aa318 | 386 | atomic_inc(&sk->sk_drops); |
fb286bb2 | 387 | kfree_skb(skb); |
3cc76caa | 388 | return NET_RX_DROP; |
1da177e4 LT |
389 | } |
390 | ||
391 | /* Charge it to the socket. */ | |
d826eb14 ED |
392 | skb_dst_drop(skb); |
393 | if (sock_queue_rcv_skb(sk, skb) < 0) { | |
1da177e4 | 394 | kfree_skb(skb); |
3cc76caa | 395 | return NET_RX_DROP; |
1da177e4 LT |
396 | } |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
401 | /* | |
1ab1457c | 402 | * This is next to useless... |
1da177e4 | 403 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
404 | * just to queue the skb... |
405 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
406 | * should call raw_rcv for demultiplexing |
407 | */ | |
408 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
409 | { | |
410 | struct inet_sock *inet = inet_sk(sk); | |
411 | struct raw6_sock *rp = raw6_sk(sk); | |
412 | ||
1ab1457c | 413 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
a92aa318 | 414 | atomic_inc(&sk->sk_drops); |
1ab1457c YH |
415 | kfree_skb(skb); |
416 | return NET_RX_DROP; | |
417 | } | |
1da177e4 LT |
418 | |
419 | if (!rp->checksum) | |
420 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
421 | ||
84fa7933 | 422 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 423 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 424 | skb_network_header_len(skb)); |
0660e03f ACM |
425 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
426 | &ipv6_hdr(skb)->daddr, | |
c720c7e8 | 427 | skb->len, inet->inet_num, skb->csum)) |
1da177e4 | 428 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 429 | } |
60476372 | 430 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
431 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
432 | &ipv6_hdr(skb)->daddr, | |
433 | skb->len, | |
c720c7e8 | 434 | inet->inet_num, 0)); |
1da177e4 LT |
435 | |
436 | if (inet->hdrincl) { | |
fb286bb2 | 437 | if (skb_checksum_complete(skb)) { |
a92aa318 | 438 | atomic_inc(&sk->sk_drops); |
1da177e4 | 439 | kfree_skb(skb); |
3cc76caa | 440 | return NET_RX_DROP; |
1da177e4 | 441 | } |
1da177e4 LT |
442 | } |
443 | ||
444 | rawv6_rcv_skb(sk, skb); | |
445 | return 0; | |
446 | } | |
447 | ||
448 | ||
449 | /* | |
450 | * This should be easy, if there is something there | |
451 | * we return it, otherwise we block. | |
452 | */ | |
453 | ||
454 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
455 | struct msghdr *msg, size_t len, | |
456 | int noblock, int flags, int *addr_len) | |
457 | { | |
458 | struct ipv6_pinfo *np = inet6_sk(sk); | |
459 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
460 | struct sk_buff *skb; | |
461 | size_t copied; | |
462 | int err; | |
463 | ||
464 | if (flags & MSG_OOB) | |
465 | return -EOPNOTSUPP; | |
1ab1457c YH |
466 | |
467 | if (addr_len) | |
1da177e4 LT |
468 | *addr_len=sizeof(*sin6); |
469 | ||
470 | if (flags & MSG_ERRQUEUE) | |
471 | return ipv6_recv_error(sk, msg, len); | |
472 | ||
4b340ae2 BH |
473 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
474 | return ipv6_recv_rxpmtu(sk, msg, len); | |
475 | ||
1da177e4 LT |
476 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
477 | if (!skb) | |
478 | goto out; | |
479 | ||
480 | copied = skb->len; | |
1ab1457c YH |
481 | if (copied > len) { |
482 | copied = len; | |
483 | msg->msg_flags |= MSG_TRUNC; | |
484 | } | |
1da177e4 | 485 | |
60476372 | 486 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
487 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
488 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 489 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
490 | goto csum_copy_err; |
491 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
492 | } else { | |
493 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
494 | if (err == -EINVAL) | |
495 | goto csum_copy_err; | |
496 | } | |
497 | if (err) | |
498 | goto out_free; | |
499 | ||
500 | /* Copy the address. */ | |
501 | if (sin6) { | |
502 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 503 | sin6->sin6_port = 0; |
4e3fd7a0 | 504 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
1da177e4 | 505 | sin6->sin6_flowinfo = 0; |
842df073 HFS |
506 | sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr, |
507 | IP6CB(skb)->iif); | |
1da177e4 LT |
508 | } |
509 | ||
3b885787 | 510 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
511 | |
512 | if (np->rxopt.all) | |
73df66f8 | 513 | ip6_datagram_recv_ctl(sk, msg, skb); |
1da177e4 LT |
514 | |
515 | err = copied; | |
516 | if (flags & MSG_TRUNC) | |
517 | err = skb->len; | |
518 | ||
519 | out_free: | |
520 | skb_free_datagram(sk, skb); | |
521 | out: | |
522 | return err; | |
523 | ||
524 | csum_copy_err: | |
3305b80c | 525 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
526 | |
527 | /* Error for blocking case is chosen to masquerade | |
528 | as some normal condition. | |
529 | */ | |
530 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
3305b80c | 531 | goto out; |
1da177e4 LT |
532 | } |
533 | ||
4c9483b2 | 534 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
357b40a1 | 535 | struct raw6_sock *rp) |
1da177e4 LT |
536 | { |
537 | struct sk_buff *skb; | |
538 | int err = 0; | |
357b40a1 HX |
539 | int offset; |
540 | int len; | |
679a8738 | 541 | int total_len; |
868c86bc AV |
542 | __wsum tmp_csum; |
543 | __sum16 csum; | |
1da177e4 LT |
544 | |
545 | if (!rp->checksum) | |
546 | goto send; | |
547 | ||
548 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
549 | goto out; | |
550 | ||
357b40a1 | 551 | offset = rp->offset; |
299b0767 | 552 | total_len = inet_sk(sk)->cork.base.length; |
679a8738 | 553 | if (offset >= total_len - 1) { |
1da177e4 | 554 | err = -EINVAL; |
357b40a1 | 555 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
556 | goto out; |
557 | } | |
558 | ||
559 | /* should be check HW csum miyazawa */ | |
560 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
561 | /* | |
562 | * Only one fragment on the socket. | |
563 | */ | |
564 | tmp_csum = skb->csum; | |
565 | } else { | |
357b40a1 | 566 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
567 | tmp_csum = 0; |
568 | ||
569 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
570 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
571 | |
572 | if (csum_skb) | |
573 | continue; | |
574 | ||
ea2ae17d | 575 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
576 | if (offset >= len) { |
577 | offset -= len; | |
578 | continue; | |
579 | } | |
580 | ||
581 | csum_skb = skb; | |
1da177e4 | 582 | } |
357b40a1 HX |
583 | |
584 | skb = csum_skb; | |
1da177e4 LT |
585 | } |
586 | ||
ea2ae17d | 587 | offset += skb_transport_offset(skb); |
357b40a1 HX |
588 | if (skb_copy_bits(skb, offset, &csum, 2)) |
589 | BUG(); | |
590 | ||
1da177e4 | 591 | /* in case cksum was not initialized */ |
357b40a1 | 592 | if (unlikely(csum)) |
5f92a738 | 593 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 594 | |
4c9483b2 DM |
595 | csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
596 | total_len, fl6->flowi6_proto, tmp_csum); | |
357b40a1 | 597 | |
4c9483b2 | 598 | if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP) |
f6ab0288 | 599 | csum = CSUM_MANGLED_0; |
1da177e4 | 600 | |
357b40a1 HX |
601 | if (skb_store_bits(skb, offset, &csum, 2)) |
602 | BUG(); | |
1da177e4 | 603 | |
1da177e4 LT |
604 | send: |
605 | err = ip6_push_pending_frames(sk); | |
606 | out: | |
607 | return err; | |
608 | } | |
609 | ||
610 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
4c9483b2 | 611 | struct flowi6 *fl6, struct dst_entry **dstp, |
1da177e4 LT |
612 | unsigned int flags) |
613 | { | |
3320da89 | 614 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
615 | struct ipv6hdr *iph; |
616 | struct sk_buff *skb; | |
1da177e4 | 617 | int err; |
1789a640 | 618 | struct rt6_info *rt = (struct rt6_info *)*dstp; |
a7ae1992 HX |
619 | int hlen = LL_RESERVED_SPACE(rt->dst.dev); |
620 | int tlen = rt->dst.dev->needed_tailroom; | |
1da177e4 | 621 | |
d8d1f30b | 622 | if (length > rt->dst.dev->mtu) { |
4c9483b2 | 623 | ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu); |
1da177e4 LT |
624 | return -EMSGSIZE; |
625 | } | |
626 | if (flags&MSG_PROBE) | |
627 | goto out; | |
628 | ||
f5184d26 | 629 | skb = sock_alloc_send_skb(sk, |
a7ae1992 | 630 | length + hlen + tlen + 15, |
f5184d26 | 631 | flags & MSG_DONTWAIT, &err); |
1da177e4 | 632 | if (skb == NULL) |
1ab1457c | 633 | goto error; |
a7ae1992 | 634 | skb_reserve(skb, hlen); |
1da177e4 | 635 | |
9c9c9ad5 | 636 | skb->protocol = htons(ETH_P_IPV6); |
1da177e4 | 637 | skb->priority = sk->sk_priority; |
4a19ec58 | 638 | skb->mark = sk->sk_mark; |
d8d1f30b | 639 | skb_dst_set(skb, &rt->dst); |
1789a640 | 640 | *dstp = NULL; |
1da177e4 | 641 | |
1ced98e8 ACM |
642 | skb_put(skb, length); |
643 | skb_reset_network_header(skb); | |
0660e03f | 644 | iph = ipv6_hdr(skb); |
1da177e4 LT |
645 | |
646 | skb->ip_summed = CHECKSUM_NONE; | |
647 | ||
b0e380b1 | 648 | skb->transport_header = skb->network_header; |
1da177e4 LT |
649 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
650 | if (err) | |
651 | goto error_fault; | |
652 | ||
edf391ff | 653 | IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); |
b2e0b385 | 654 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, |
d8d1f30b | 655 | rt->dst.dev, dst_output); |
1da177e4 | 656 | if (err > 0) |
6ce9e7b5 | 657 | err = net_xmit_errno(err); |
1da177e4 LT |
658 | if (err) |
659 | goto error; | |
660 | out: | |
661 | return 0; | |
662 | ||
663 | error_fault: | |
664 | err = -EFAULT; | |
665 | kfree_skb(skb); | |
666 | error: | |
3bd653c8 | 667 | IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
6ce9e7b5 ED |
668 | if (err == -ENOBUFS && !np->recverr) |
669 | err = 0; | |
1ab1457c | 670 | return err; |
1da177e4 LT |
671 | } |
672 | ||
4c9483b2 | 673 | static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg) |
1da177e4 LT |
674 | { |
675 | struct iovec *iov; | |
676 | u8 __user *type = NULL; | |
677 | u8 __user *code = NULL; | |
6e8f4d48 | 678 | u8 len = 0; |
1da177e4 LT |
679 | int probed = 0; |
680 | int i; | |
681 | ||
682 | if (!msg->msg_iov) | |
a27b58fe | 683 | return 0; |
1da177e4 LT |
684 | |
685 | for (i = 0; i < msg->msg_iovlen; i++) { | |
686 | iov = &msg->msg_iov[i]; | |
687 | if (!iov) | |
688 | continue; | |
689 | ||
4c9483b2 | 690 | switch (fl6->flowi6_proto) { |
1da177e4 LT |
691 | case IPPROTO_ICMPV6: |
692 | /* check if one-byte field is readable or not. */ | |
693 | if (iov->iov_base && iov->iov_len < 1) | |
694 | break; | |
695 | ||
696 | if (!type) { | |
697 | type = iov->iov_base; | |
698 | /* check if code field is readable or not. */ | |
699 | if (iov->iov_len > 1) | |
700 | code = type + 1; | |
701 | } else if (!code) | |
702 | code = iov->iov_base; | |
703 | ||
704 | if (type && code) { | |
1958b856 DM |
705 | if (get_user(fl6->fl6_icmp_type, type) || |
706 | get_user(fl6->fl6_icmp_code, code)) | |
a27b58fe | 707 | return -EFAULT; |
1da177e4 LT |
708 | probed = 1; |
709 | } | |
710 | break; | |
6e8f4d48 MN |
711 | case IPPROTO_MH: |
712 | if (iov->iov_base && iov->iov_len < 1) | |
713 | break; | |
714 | /* check if type field is readable or not. */ | |
715 | if (iov->iov_len > 2 - len) { | |
716 | u8 __user *p = iov->iov_base; | |
1958b856 | 717 | if (get_user(fl6->fl6_mh_type, &p[2 - len])) |
a27b58fe | 718 | return -EFAULT; |
6e8f4d48 MN |
719 | probed = 1; |
720 | } else | |
721 | len += iov->iov_len; | |
722 | ||
723 | break; | |
1da177e4 LT |
724 | default: |
725 | probed = 1; | |
726 | break; | |
727 | } | |
728 | if (probed) | |
729 | break; | |
730 | } | |
a27b58fe | 731 | return 0; |
1da177e4 LT |
732 | } |
733 | ||
734 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
735 | struct msghdr *msg, size_t len) | |
736 | { | |
737 | struct ipv6_txoptions opt_space; | |
738 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
20c59de2 | 739 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
740 | struct inet_sock *inet = inet_sk(sk); |
741 | struct ipv6_pinfo *np = inet6_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; | |
4c9483b2 | 746 | struct flowi6 fl6; |
1da177e4 LT |
747 | int addr_len = msg->msg_namelen; |
748 | int hlimit = -1; | |
41a1f8ea | 749 | int tclass = -1; |
13b52cd4 | 750 | int dontfrag = -1; |
1da177e4 LT |
751 | u16 proto; |
752 | int err; | |
753 | ||
754 | /* Rough check on arithmetic overflow, | |
b59e139b | 755 | better check is made in ip6_append_data(). |
1da177e4 | 756 | */ |
b59e139b | 757 | if (len > INT_MAX) |
1da177e4 LT |
758 | return -EMSGSIZE; |
759 | ||
760 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 761 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
762 | return -EOPNOTSUPP; |
763 | ||
764 | /* | |
1ab1457c | 765 | * Get and verify the address. |
1da177e4 | 766 | */ |
4c9483b2 | 767 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 | 768 | |
4c9483b2 | 769 | fl6.flowi6_mark = sk->sk_mark; |
4a19ec58 | 770 | |
1da177e4 | 771 | if (sin6) { |
1ab1457c | 772 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
773 | return -EINVAL; |
774 | ||
1ab1457c | 775 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
a02cec21 | 776 | return -EAFNOSUPPORT; |
1da177e4 LT |
777 | |
778 | /* port is the proto value [0..255] carried in nexthdr */ | |
779 | proto = ntohs(sin6->sin6_port); | |
780 | ||
781 | if (!proto) | |
c720c7e8 ED |
782 | proto = inet->inet_num; |
783 | else if (proto != inet->inet_num) | |
a02cec21 | 784 | return -EINVAL; |
1da177e4 LT |
785 | |
786 | if (proto > 255) | |
a02cec21 | 787 | return -EINVAL; |
1da177e4 LT |
788 | |
789 | daddr = &sin6->sin6_addr; | |
790 | if (np->sndflow) { | |
4c9483b2 DM |
791 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
792 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
793 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
794 | if (flowlabel == NULL) |
795 | return -EINVAL; | |
796 | daddr = &flowlabel->dst; | |
797 | } | |
798 | } | |
799 | ||
800 | /* | |
801 | * Otherwise it will be difficult to maintain | |
802 | * sk->sk_dst_cache. | |
803 | */ | |
804 | if (sk->sk_state == TCP_ESTABLISHED && | |
805 | ipv6_addr_equal(daddr, &np->daddr)) | |
806 | daddr = &np->daddr; | |
807 | ||
808 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
809 | sin6->sin6_scope_id && | |
842df073 | 810 | __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) |
4c9483b2 | 811 | fl6.flowi6_oif = sin6->sin6_scope_id; |
1da177e4 | 812 | } else { |
1ab1457c | 813 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 814 | return -EDESTADDRREQ; |
1ab1457c | 815 | |
c720c7e8 | 816 | proto = inet->inet_num; |
1da177e4 | 817 | daddr = &np->daddr; |
4c9483b2 | 818 | fl6.flowlabel = np->flow_label; |
1da177e4 LT |
819 | } |
820 | ||
4c9483b2 DM |
821 | if (fl6.flowi6_oif == 0) |
822 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
823 | |
824 | if (msg->msg_controllen) { | |
825 | opt = &opt_space; | |
826 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
827 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
828 | ||
73df66f8 TP |
829 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, |
830 | &hlimit, &tclass, &dontfrag); | |
1da177e4 LT |
831 | if (err < 0) { |
832 | fl6_sock_release(flowlabel); | |
833 | return err; | |
834 | } | |
4c9483b2 DM |
835 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
836 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
837 | if (flowlabel == NULL) |
838 | return -EINVAL; | |
839 | } | |
840 | if (!(opt->opt_nflen|opt->opt_flen)) | |
841 | opt = NULL; | |
842 | } | |
843 | if (opt == NULL) | |
844 | opt = np->opt; | |
df9890c3 YH |
845 | if (flowlabel) |
846 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
847 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 848 | |
4c9483b2 DM |
849 | fl6.flowi6_proto = proto; |
850 | err = rawv6_probe_proto_opt(&fl6, msg); | |
a27b58fe HC |
851 | if (err) |
852 | goto out; | |
1ab1457c | 853 | |
876c7f41 | 854 | if (!ipv6_addr_any(daddr)) |
4e3fd7a0 | 855 | fl6.daddr = *daddr; |
876c7f41 | 856 | else |
4c9483b2 DM |
857 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
858 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
4e3fd7a0 | 859 | fl6.saddr = np->saddr; |
1da177e4 | 860 | |
4c9483b2 | 861 | final_p = fl6_update_dst(&fl6, opt, &final); |
1da177e4 | 862 | |
4c9483b2 DM |
863 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) |
864 | fl6.flowi6_oif = np->mcast_oif; | |
c4062dfc EH |
865 | else if (!fl6.flowi6_oif) |
866 | fl6.flowi6_oif = np->ucast_oif; | |
4c9483b2 | 867 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
1da177e4 | 868 | |
4c9483b2 | 869 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true); |
68d0c6d3 DM |
870 | if (IS_ERR(dst)) { |
871 | err = PTR_ERR(dst); | |
1da177e4 | 872 | goto out; |
14e50e57 | 873 | } |
1da177e4 | 874 | if (hlimit < 0) { |
4c9483b2 | 875 | if (ipv6_addr_is_multicast(&fl6.daddr)) |
1da177e4 LT |
876 | hlimit = np->mcast_hops; |
877 | else | |
878 | hlimit = np->hop_limit; | |
879 | if (hlimit < 0) | |
6b75d090 | 880 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
881 | } |
882 | ||
e651f03a | 883 | if (tclass < 0) |
e012d51c | 884 | tclass = np->tclass; |
41a1f8ea | 885 | |
13b52cd4 BH |
886 | if (dontfrag < 0) |
887 | dontfrag = np->dontfrag; | |
888 | ||
1da177e4 LT |
889 | if (msg->msg_flags&MSG_CONFIRM) |
890 | goto do_confirm; | |
891 | ||
892 | back_from_confirm: | |
1789a640 | 893 | if (inet->hdrincl) |
4c9483b2 | 894 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags); |
1789a640 | 895 | else { |
1da177e4 | 896 | lock_sock(sk); |
41a1f8ea | 897 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
4c9483b2 | 898 | len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst, |
13b52cd4 | 899 | msg->msg_flags, dontfrag); |
1da177e4 LT |
900 | |
901 | if (err) | |
902 | ip6_flush_pending_frames(sk); | |
903 | else if (!(msg->msg_flags & MSG_MORE)) | |
4c9483b2 | 904 | err = rawv6_push_pending_frames(sk, &fl6, rp); |
3ef9d943 | 905 | release_sock(sk); |
1da177e4 LT |
906 | } |
907 | done: | |
6d3e85ec | 908 | dst_release(dst); |
1ab1457c | 909 | out: |
1da177e4 LT |
910 | fl6_sock_release(flowlabel); |
911 | return err<0?err:len; | |
912 | do_confirm: | |
913 | dst_confirm(dst); | |
914 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
915 | goto back_from_confirm; | |
916 | err = 0; | |
917 | goto done; | |
918 | } | |
919 | ||
1ab1457c | 920 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
921 | char __user *optval, int optlen) |
922 | { | |
923 | switch (optname) { | |
924 | case ICMPV6_FILTER: | |
925 | if (optlen > sizeof(struct icmp6_filter)) | |
926 | optlen = sizeof(struct icmp6_filter); | |
927 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
928 | return -EFAULT; | |
929 | return 0; | |
930 | default: | |
931 | return -ENOPROTOOPT; | |
3ff50b79 | 932 | } |
1da177e4 LT |
933 | |
934 | return 0; | |
935 | } | |
936 | ||
1ab1457c | 937 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
938 | char __user *optval, int __user *optlen) |
939 | { | |
940 | int len; | |
941 | ||
942 | switch (optname) { | |
943 | case ICMPV6_FILTER: | |
944 | if (get_user(len, optlen)) | |
945 | return -EFAULT; | |
946 | if (len < 0) | |
947 | return -EINVAL; | |
948 | if (len > sizeof(struct icmp6_filter)) | |
949 | len = sizeof(struct icmp6_filter); | |
950 | if (put_user(len, optlen)) | |
951 | return -EFAULT; | |
952 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
953 | return -EFAULT; | |
954 | return 0; | |
955 | default: | |
956 | return -ENOPROTOOPT; | |
3ff50b79 | 957 | } |
1da177e4 LT |
958 | |
959 | return 0; | |
960 | } | |
961 | ||
962 | ||
3fdadf7d | 963 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 964 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
965 | { |
966 | struct raw6_sock *rp = raw6_sk(sk); | |
967 | int val; | |
968 | ||
1ab1457c | 969 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
970 | return -EFAULT; |
971 | ||
972 | switch (optname) { | |
207ec0ab JP |
973 | case IPV6_CHECKSUM: |
974 | if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 && | |
975 | level == IPPROTO_IPV6) { | |
976 | /* | |
977 | * RFC3542 tells that IPV6_CHECKSUM socket | |
978 | * option in the IPPROTO_IPV6 level is not | |
979 | * allowed on ICMPv6 sockets. | |
980 | * If you want to set it, use IPPROTO_RAW | |
981 | * level IPV6_CHECKSUM socket option | |
982 | * (Linux extension). | |
983 | */ | |
984 | return -EINVAL; | |
985 | } | |
1a98d05f | 986 | |
207ec0ab JP |
987 | /* You may get strange result with a positive odd offset; |
988 | RFC2292bis agrees with me. */ | |
989 | if (val > 0 && (val&1)) | |
990 | return -EINVAL; | |
991 | if (val < 0) { | |
992 | rp->checksum = 0; | |
993 | } else { | |
994 | rp->checksum = 1; | |
995 | rp->offset = val; | |
996 | } | |
1da177e4 | 997 | |
207ec0ab | 998 | return 0; |
1da177e4 | 999 | |
207ec0ab JP |
1000 | default: |
1001 | return -ENOPROTOOPT; | |
1da177e4 LT |
1002 | } |
1003 | } | |
1004 | ||
3fdadf7d | 1005 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1006 | char __user *optval, unsigned int optlen) |
1da177e4 | 1007 | { |
207ec0ab JP |
1008 | switch (level) { |
1009 | case SOL_RAW: | |
1010 | break; | |
1da177e4 | 1011 | |
207ec0ab JP |
1012 | case SOL_ICMPV6: |
1013 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1014 | return -EOPNOTSUPP; | |
1015 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1016 | case SOL_IPV6: | |
1017 | if (optname == IPV6_CHECKSUM) | |
1018 | break; | |
1019 | default: | |
1020 | return ipv6_setsockopt(sk, level, optname, optval, optlen); | |
3ff50b79 SH |
1021 | } |
1022 | ||
3fdadf7d DM |
1023 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1024 | } | |
1025 | ||
1026 | #ifdef CONFIG_COMPAT | |
1027 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 1028 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1029 | { |
543d9cfe ACM |
1030 | switch (level) { |
1031 | case SOL_RAW: | |
1032 | break; | |
1033 | case SOL_ICMPV6: | |
c720c7e8 | 1034 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
543d9cfe ACM |
1035 | return -EOPNOTSUPP; |
1036 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1037 | case SOL_IPV6: | |
1038 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1039 | break; |
543d9cfe ACM |
1040 | default: |
1041 | return compat_ipv6_setsockopt(sk, level, optname, | |
1042 | optval, optlen); | |
3ff50b79 | 1043 | } |
3fdadf7d DM |
1044 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1045 | } | |
1046 | #endif | |
1047 | ||
1048 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1049 | char __user *optval, int __user *optlen) | |
1050 | { | |
1051 | struct raw6_sock *rp = raw6_sk(sk); | |
1052 | int val, len; | |
1da177e4 LT |
1053 | |
1054 | if (get_user(len,optlen)) | |
1055 | return -EFAULT; | |
1056 | ||
1057 | switch (optname) { | |
1058 | case IPV6_CHECKSUM: | |
1a98d05f YH |
1059 | /* |
1060 | * We allow getsockopt() for IPPROTO_IPV6-level | |
1061 | * IPV6_CHECKSUM socket option on ICMPv6 sockets | |
1062 | * since RFC3542 is silent about it. | |
1063 | */ | |
1da177e4 LT |
1064 | if (rp->checksum == 0) |
1065 | val = -1; | |
1066 | else | |
1067 | val = rp->offset; | |
1068 | break; | |
1069 | ||
1070 | default: | |
1071 | return -ENOPROTOOPT; | |
1072 | } | |
1073 | ||
1074 | len = min_t(unsigned int, sizeof(int), len); | |
1075 | ||
1076 | if (put_user(len, optlen)) | |
1077 | return -EFAULT; | |
1078 | if (copy_to_user(optval,&val,len)) | |
1079 | return -EFAULT; | |
1080 | return 0; | |
1081 | } | |
1082 | ||
3fdadf7d DM |
1083 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1084 | char __user *optval, int __user *optlen) | |
1085 | { | |
207ec0ab JP |
1086 | switch (level) { |
1087 | case SOL_RAW: | |
1088 | break; | |
3fdadf7d | 1089 | |
207ec0ab JP |
1090 | case SOL_ICMPV6: |
1091 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1092 | return -EOPNOTSUPP; | |
1093 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1094 | case SOL_IPV6: | |
1095 | if (optname == IPV6_CHECKSUM) | |
1096 | break; | |
1097 | default: | |
1098 | return ipv6_getsockopt(sk, level, optname, optval, optlen); | |
3ff50b79 SH |
1099 | } |
1100 | ||
3fdadf7d DM |
1101 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1102 | } | |
1103 | ||
1104 | #ifdef CONFIG_COMPAT | |
1105 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1106 | char __user *optval, int __user *optlen) |
3fdadf7d | 1107 | { |
543d9cfe ACM |
1108 | switch (level) { |
1109 | case SOL_RAW: | |
1110 | break; | |
1111 | case SOL_ICMPV6: | |
c720c7e8 | 1112 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
543d9cfe ACM |
1113 | return -EOPNOTSUPP; |
1114 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1115 | case SOL_IPV6: | |
1116 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1117 | break; |
543d9cfe ACM |
1118 | default: |
1119 | return compat_ipv6_getsockopt(sk, level, optname, | |
1120 | optval, optlen); | |
3ff50b79 | 1121 | } |
3fdadf7d DM |
1122 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1123 | } | |
1124 | #endif | |
1125 | ||
1da177e4 LT |
1126 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1127 | { | |
207ec0ab JP |
1128 | switch (cmd) { |
1129 | case SIOCOUTQ: { | |
1130 | int amount = sk_wmem_alloc_get(sk); | |
31e6d363 | 1131 | |
207ec0ab JP |
1132 | return put_user(amount, (int __user *)arg); |
1133 | } | |
1134 | case SIOCINQ: { | |
1135 | struct sk_buff *skb; | |
1136 | int amount = 0; | |
1137 | ||
1138 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
1139 | skb = skb_peek(&sk->sk_receive_queue); | |
1140 | if (skb != NULL) | |
29a3cad5 SH |
1141 | amount = skb_tail_pointer(skb) - |
1142 | skb_transport_header(skb); | |
207ec0ab JP |
1143 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1144 | return put_user(amount, (int __user *)arg); | |
1145 | } | |
1da177e4 | 1146 | |
207ec0ab | 1147 | default: |
7bc570c8 | 1148 | #ifdef CONFIG_IPV6_MROUTE |
207ec0ab | 1149 | return ip6mr_ioctl(sk, cmd, (void __user *)arg); |
7bc570c8 | 1150 | #else |
207ec0ab | 1151 | return -ENOIOCTLCMD; |
7bc570c8 | 1152 | #endif |
1da177e4 LT |
1153 | } |
1154 | } | |
1155 | ||
e2d57766 DM |
1156 | #ifdef CONFIG_COMPAT |
1157 | static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) | |
1158 | { | |
1159 | switch (cmd) { | |
1160 | case SIOCOUTQ: | |
1161 | case SIOCINQ: | |
1162 | return -ENOIOCTLCMD; | |
1163 | default: | |
1164 | #ifdef CONFIG_IPV6_MROUTE | |
1165 | return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg)); | |
1166 | #else | |
1167 | return -ENOIOCTLCMD; | |
1168 | #endif | |
1169 | } | |
1170 | } | |
1171 | #endif | |
1172 | ||
1da177e4 LT |
1173 | static void rawv6_close(struct sock *sk, long timeout) |
1174 | { | |
c720c7e8 | 1175 | if (inet_sk(sk)->inet_num == IPPROTO_RAW) |
725a8ff0 | 1176 | ip6_ra_control(sk, -1); |
7bc570c8 | 1177 | ip6mr_sk_done(sk); |
1da177e4 LT |
1178 | sk_common_release(sk); |
1179 | } | |
1180 | ||
7d06b2e0 | 1181 | static void raw6_destroy(struct sock *sk) |
22dd4850 DL |
1182 | { |
1183 | lock_sock(sk); | |
1184 | ip6_flush_pending_frames(sk); | |
1185 | release_sock(sk); | |
f23d60de | 1186 | |
7d06b2e0 | 1187 | inet6_destroy_sock(sk); |
22dd4850 DL |
1188 | } |
1189 | ||
1da177e4 LT |
1190 | static int rawv6_init_sk(struct sock *sk) |
1191 | { | |
f48d5ff1 MN |
1192 | struct raw6_sock *rp = raw6_sk(sk); |
1193 | ||
c720c7e8 | 1194 | switch (inet_sk(sk)->inet_num) { |
f48d5ff1 | 1195 | case IPPROTO_ICMPV6: |
1da177e4 LT |
1196 | rp->checksum = 1; |
1197 | rp->offset = 2; | |
f48d5ff1 MN |
1198 | break; |
1199 | case IPPROTO_MH: | |
1200 | rp->checksum = 1; | |
1201 | rp->offset = 4; | |
1202 | break; | |
1203 | default: | |
1204 | break; | |
1da177e4 | 1205 | } |
a02cec21 | 1206 | return 0; |
1da177e4 LT |
1207 | } |
1208 | ||
1209 | struct proto rawv6_prot = { | |
543d9cfe ACM |
1210 | .name = "RAWv6", |
1211 | .owner = THIS_MODULE, | |
1212 | .close = rawv6_close, | |
22dd4850 | 1213 | .destroy = raw6_destroy, |
543d9cfe ACM |
1214 | .connect = ip6_datagram_connect, |
1215 | .disconnect = udp_disconnect, | |
1216 | .ioctl = rawv6_ioctl, | |
1217 | .init = rawv6_init_sk, | |
543d9cfe ACM |
1218 | .setsockopt = rawv6_setsockopt, |
1219 | .getsockopt = rawv6_getsockopt, | |
1220 | .sendmsg = rawv6_sendmsg, | |
1221 | .recvmsg = rawv6_recvmsg, | |
1222 | .bind = rawv6_bind, | |
1223 | .backlog_rcv = rawv6_rcv_skb, | |
fc8717ba PE |
1224 | .hash = raw_hash_sk, |
1225 | .unhash = raw_unhash_sk, | |
543d9cfe | 1226 | .obj_size = sizeof(struct raw6_sock), |
fc8717ba | 1227 | .h.raw_hash = &raw_v6_hashinfo, |
3fdadf7d | 1228 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1229 | .compat_setsockopt = compat_rawv6_setsockopt, |
1230 | .compat_getsockopt = compat_rawv6_getsockopt, | |
e2d57766 | 1231 | .compat_ioctl = compat_rawv6_ioctl, |
3fdadf7d | 1232 | #endif |
1da177e4 LT |
1233 | }; |
1234 | ||
1235 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
1236 | static int raw6_seq_show(struct seq_file *seq, void *v) |
1237 | { | |
17ef66af LC |
1238 | if (v == SEQ_START_TOKEN) { |
1239 | seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); | |
1240 | } else { | |
1241 | struct sock *sp = v; | |
1242 | __u16 srcp = inet_sk(sp)->inet_num; | |
1243 | ip6_dgram_sock_seq_show(seq, v, srcp, 0, | |
1244 | raw_seq_private(seq)->bucket); | |
1245 | } | |
1da177e4 LT |
1246 | return 0; |
1247 | } | |
1248 | ||
56b3d975 | 1249 | static const struct seq_operations raw6_seq_ops = { |
42a73808 PE |
1250 | .start = raw_seq_start, |
1251 | .next = raw_seq_next, | |
1252 | .stop = raw_seq_stop, | |
1da177e4 LT |
1253 | .show = raw6_seq_show, |
1254 | }; | |
1255 | ||
1256 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1257 | { | |
3046d767 | 1258 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); |
1da177e4 LT |
1259 | } |
1260 | ||
9a32144e | 1261 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1262 | .owner = THIS_MODULE, |
1263 | .open = raw6_seq_open, | |
1264 | .read = seq_read, | |
1265 | .llseek = seq_lseek, | |
f51d599f | 1266 | .release = seq_release_net, |
1da177e4 LT |
1267 | }; |
1268 | ||
2c8c1e72 | 1269 | static int __net_init raw6_init_net(struct net *net) |
1da177e4 | 1270 | { |
d4beaa66 | 1271 | if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops)) |
1da177e4 | 1272 | return -ENOMEM; |
a308da16 | 1273 | |
1da177e4 LT |
1274 | return 0; |
1275 | } | |
1276 | ||
2c8c1e72 | 1277 | static void __net_exit raw6_exit_net(struct net *net) |
a308da16 | 1278 | { |
ece31ffd | 1279 | remove_proc_entry("raw6", net->proc_net); |
a308da16 PE |
1280 | } |
1281 | ||
1282 | static struct pernet_operations raw6_net_ops = { | |
1283 | .init = raw6_init_net, | |
1284 | .exit = raw6_exit_net, | |
1285 | }; | |
1286 | ||
1287 | int __init raw6_proc_init(void) | |
1288 | { | |
1289 | return register_pernet_subsys(&raw6_net_ops); | |
1290 | } | |
1291 | ||
1da177e4 LT |
1292 | void raw6_proc_exit(void) |
1293 | { | |
a308da16 | 1294 | unregister_pernet_subsys(&raw6_net_ops); |
1da177e4 LT |
1295 | } |
1296 | #endif /* CONFIG_PROC_FS */ | |
7f4e4868 DL |
1297 | |
1298 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1299 | static const struct proto_ops inet6_sockraw_ops = { | |
1300 | .family = PF_INET6, | |
1301 | .owner = THIS_MODULE, | |
1302 | .release = inet6_release, | |
1303 | .bind = inet6_bind, | |
1304 | .connect = inet_dgram_connect, /* ok */ | |
1305 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1306 | .accept = sock_no_accept, /* a do nothing */ | |
1307 | .getname = inet6_getname, | |
1308 | .poll = datagram_poll, /* ok */ | |
1309 | .ioctl = inet6_ioctl, /* must change */ | |
1310 | .listen = sock_no_listen, /* ok */ | |
1311 | .shutdown = inet_shutdown, /* ok */ | |
1312 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1313 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1314 | .sendmsg = inet_sendmsg, /* ok */ | |
1315 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1316 | .mmap = sock_no_mmap, | |
1317 | .sendpage = sock_no_sendpage, | |
1318 | #ifdef CONFIG_COMPAT | |
1319 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1320 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1321 | #endif | |
1322 | }; | |
1323 | ||
1324 | static struct inet_protosw rawv6_protosw = { | |
1325 | .type = SOCK_RAW, | |
1326 | .protocol = IPPROTO_IP, /* wild card */ | |
1327 | .prot = &rawv6_prot, | |
1328 | .ops = &inet6_sockraw_ops, | |
7f4e4868 DL |
1329 | .no_check = UDP_CSUM_DEFAULT, |
1330 | .flags = INET_PROTOSW_REUSE, | |
1331 | }; | |
1332 | ||
1333 | int __init rawv6_init(void) | |
1334 | { | |
1335 | int ret; | |
1336 | ||
1337 | ret = inet6_register_protosw(&rawv6_protosw); | |
1338 | if (ret) | |
1339 | goto out; | |
1340 | out: | |
1341 | return ret; | |
1342 | } | |
1343 | ||
09f7709f | 1344 | void rawv6_exit(void) |
7f4e4868 DL |
1345 | { |
1346 | inet6_unregister_protosw(&rawv6_protosw); | |
1347 | } |