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 | |
b673e4df | 66 | static struct raw_hashinfo raw_v6_hashinfo = { |
938b93ad | 67 | .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock), |
b673e4df | 68 | }; |
1da177e4 | 69 | |
be185884 | 70 | static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk, |
b71d1d42 ED |
71 | unsigned short num, const struct in6_addr *loc_addr, |
72 | const struct in6_addr *rmt_addr, int dif) | |
1da177e4 | 73 | { |
a50feda5 | 74 | bool is_multicast = ipv6_addr_is_multicast(loc_addr); |
1da177e4 | 75 | |
b67bfe0d | 76 | sk_for_each_from(sk) |
c720c7e8 | 77 | if (inet_sk(sk)->inet_num == num) { |
1da177e4 LT |
78 | struct ipv6_pinfo *np = inet6_sk(sk); |
79 | ||
878628fb | 80 | if (!net_eq(sock_net(sk), net)) |
be185884 PE |
81 | continue; |
82 | ||
1da177e4 LT |
83 | if (!ipv6_addr_any(&np->daddr) && |
84 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
85 | continue; | |
86 | ||
0bd1b59b AM |
87 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
88 | continue; | |
89 | ||
1da177e4 LT |
90 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
91 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) | |
92 | goto found; | |
93 | if (is_multicast && | |
94 | inet6_mc_check(sk, loc_addr, rmt_addr)) | |
95 | goto found; | |
96 | continue; | |
97 | } | |
98 | goto found; | |
99 | } | |
100 | sk = NULL; | |
101 | found: | |
102 | return sk; | |
103 | } | |
104 | ||
105 | /* | |
106 | * 0 - deliver | |
107 | * 1 - block | |
108 | */ | |
1b05c4b5 | 109 | static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb) |
1da177e4 | 110 | { |
1b05c4b5 ED |
111 | struct icmp6hdr *_hdr; |
112 | const struct icmp6hdr *hdr; | |
1da177e4 | 113 | |
1b05c4b5 ED |
114 | hdr = skb_header_pointer(skb, skb_transport_offset(skb), |
115 | sizeof(_hdr), &_hdr); | |
116 | if (hdr) { | |
117 | const __u32 *data = &raw6_sk(sk)->filter.data[0]; | |
118 | unsigned int type = hdr->icmp6_type; | |
1da177e4 | 119 | |
1b05c4b5 | 120 | return (data[type >> 5] & (1U << (type & 31))) != 0; |
1da177e4 | 121 | } |
1b05c4b5 | 122 | return 1; |
1da177e4 LT |
123 | } |
124 | ||
07a93626 | 125 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
f2eda47d | 126 | typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb); |
59fbb3a6 | 127 | |
f2eda47d ED |
128 | static mh_filter_t __rcu *mh_filter __read_mostly; |
129 | ||
130 | int rawv6_mh_filter_register(mh_filter_t filter) | |
59fbb3a6 | 131 | { |
cf778b00 | 132 | rcu_assign_pointer(mh_filter, filter); |
59fbb3a6 MN |
133 | return 0; |
134 | } | |
135 | EXPORT_SYMBOL(rawv6_mh_filter_register); | |
136 | ||
f2eda47d | 137 | int rawv6_mh_filter_unregister(mh_filter_t filter) |
59fbb3a6 | 138 | { |
a9b3cd7f | 139 | RCU_INIT_POINTER(mh_filter, NULL); |
59fbb3a6 MN |
140 | synchronize_rcu(); |
141 | return 0; | |
142 | } | |
143 | EXPORT_SYMBOL(rawv6_mh_filter_unregister); | |
144 | ||
145 | #endif | |
146 | ||
1da177e4 LT |
147 | /* |
148 | * demultiplex raw sockets. | |
149 | * (should consider queueing the skb in the sock receive_queue | |
150 | * without calling rawv6.c) | |
151 | * | |
152 | * Caller owns SKB so we must make clones. | |
153 | */ | |
a50feda5 | 154 | static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
1da177e4 | 155 | { |
b71d1d42 ED |
156 | const struct in6_addr *saddr; |
157 | const struct in6_addr *daddr; | |
1da177e4 | 158 | struct sock *sk; |
a50feda5 | 159 | bool delivered = false; |
1da177e4 | 160 | __u8 hash; |
be185884 | 161 | struct net *net; |
1da177e4 | 162 | |
0660e03f | 163 | saddr = &ipv6_hdr(skb)->saddr; |
1da177e4 LT |
164 | daddr = saddr + 1; |
165 | ||
f9242b6b | 166 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
1da177e4 | 167 | |
b673e4df PE |
168 | read_lock(&raw_v6_hashinfo.lock); |
169 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
1da177e4 | 170 | |
1da177e4 LT |
171 | if (sk == NULL) |
172 | goto out; | |
173 | ||
c346dca1 | 174 | net = dev_net(skb->dev); |
be185884 | 175 | sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
1da177e4 LT |
176 | |
177 | while (sk) { | |
7be96f76 MN |
178 | int filtered; |
179 | ||
a50feda5 | 180 | delivered = true; |
7be96f76 MN |
181 | switch (nexthdr) { |
182 | case IPPROTO_ICMPV6: | |
183 | filtered = icmpv6_filter(sk, skb); | |
184 | break; | |
59fbb3a6 | 185 | |
07a93626 | 186 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
7be96f76 | 187 | case IPPROTO_MH: |
59fbb3a6 | 188 | { |
7be96f76 MN |
189 | /* XXX: To validate MH only once for each packet, |
190 | * this is placed here. It should be after checking | |
191 | * xfrm policy, however it doesn't. The checking xfrm | |
192 | * policy is placed in rawv6_rcv() because it is | |
193 | * required for each socket. | |
194 | */ | |
f2eda47d | 195 | mh_filter_t *filter; |
59fbb3a6 MN |
196 | |
197 | filter = rcu_dereference(mh_filter); | |
f2eda47d | 198 | filtered = filter ? (*filter)(sk, skb) : 0; |
7be96f76 | 199 | break; |
59fbb3a6 | 200 | } |
7be96f76 MN |
201 | #endif |
202 | default: | |
203 | filtered = 0; | |
204 | break; | |
205 | } | |
206 | ||
207 | if (filtered < 0) | |
208 | break; | |
209 | if (filtered == 0) { | |
1da177e4 LT |
210 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
211 | ||
212 | /* Not releasing hash table! */ | |
9fb9cbb1 YK |
213 | if (clone) { |
214 | nf_reset(clone); | |
1da177e4 | 215 | rawv6_rcv(sk, clone); |
9fb9cbb1 | 216 | } |
1da177e4 | 217 | } |
be185884 | 218 | sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr, |
2dac4b96 | 219 | IP6CB(skb)->iif); |
1da177e4 LT |
220 | } |
221 | out: | |
b673e4df | 222 | read_unlock(&raw_v6_hashinfo.lock); |
d13964f4 | 223 | return delivered; |
1da177e4 LT |
224 | } |
225 | ||
a50feda5 | 226 | bool raw6_local_deliver(struct sk_buff *skb, int nexthdr) |
69d6da0b PE |
227 | { |
228 | struct sock *raw_sk; | |
229 | ||
f9242b6b | 230 | raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]); |
69d6da0b PE |
231 | if (raw_sk && !ipv6_raw_deliver(skb, nexthdr)) |
232 | raw_sk = NULL; | |
233 | ||
234 | return raw_sk != NULL; | |
235 | } | |
236 | ||
1da177e4 LT |
237 | /* This cleans up af_inet6 a bit. -DaveM */ |
238 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
239 | { | |
240 | struct inet_sock *inet = inet_sk(sk); | |
241 | struct ipv6_pinfo *np = inet6_sk(sk); | |
242 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; | |
e69a4adc | 243 | __be32 v4addr = 0; |
1da177e4 LT |
244 | int addr_type; |
245 | int err; | |
246 | ||
247 | if (addr_len < SIN6_LEN_RFC2133) | |
248 | return -EINVAL; | |
249 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
250 | ||
251 | /* Raw sockets are IPv6 only */ | |
252 | if (addr_type == IPV6_ADDR_MAPPED) | |
fd5c0027 | 253 | return -EADDRNOTAVAIL; |
1da177e4 LT |
254 | |
255 | lock_sock(sk); | |
256 | ||
257 | err = -EINVAL; | |
258 | if (sk->sk_state != TCP_CLOSE) | |
259 | goto out; | |
260 | ||
fd5c0027 | 261 | rcu_read_lock(); |
1da177e4 LT |
262 | /* Check if the address belongs to the host. */ |
263 | if (addr_type != IPV6_ADDR_ANY) { | |
264 | struct net_device *dev = NULL; | |
265 | ||
842df073 | 266 | if (__ipv6_addr_needs_scope_id(addr_type)) { |
1da177e4 LT |
267 | if (addr_len >= sizeof(struct sockaddr_in6) && |
268 | addr->sin6_scope_id) { | |
269 | /* Override any existing binding, if another | |
270 | * one is supplied by user. | |
271 | */ | |
272 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
273 | } | |
1ab1457c | 274 | |
1da177e4 LT |
275 | /* Binding to link-local address requires an interface */ |
276 | if (!sk->sk_bound_dev_if) | |
fd5c0027 | 277 | goto out_unlock; |
1da177e4 | 278 | |
fd5c0027 ED |
279 | err = -ENODEV; |
280 | dev = dev_get_by_index_rcu(sock_net(sk), | |
281 | sk->sk_bound_dev_if); | |
282 | if (!dev) | |
283 | goto out_unlock; | |
1da177e4 | 284 | } |
1ab1457c | 285 | |
1da177e4 LT |
286 | /* ipv4 addr of the socket is invalid. Only the |
287 | * unspecified and mapped address have a v4 equivalent. | |
288 | */ | |
289 | v4addr = LOOPBACK4_IPV6; | |
290 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
291 | err = -EADDRNOTAVAIL; | |
3b1e0a65 | 292 | if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr, |
bfeade08 | 293 | dev, 0)) { |
fd5c0027 | 294 | goto out_unlock; |
1da177e4 LT |
295 | } |
296 | } | |
1da177e4 LT |
297 | } |
298 | ||
c720c7e8 | 299 | inet->inet_rcv_saddr = inet->inet_saddr = v4addr; |
4e3fd7a0 | 300 | np->rcv_saddr = addr->sin6_addr; |
1da177e4 | 301 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
4e3fd7a0 | 302 | np->saddr = addr->sin6_addr; |
1da177e4 | 303 | err = 0; |
fd5c0027 ED |
304 | out_unlock: |
305 | rcu_read_unlock(); | |
1da177e4 LT |
306 | out: |
307 | release_sock(sk); | |
308 | return err; | |
309 | } | |
310 | ||
69d6da0b | 311 | static void rawv6_err(struct sock *sk, struct sk_buff *skb, |
1da177e4 | 312 | struct inet6_skb_parm *opt, |
d5fdd6ba | 313 | u8 type, u8 code, int offset, __be32 info) |
1da177e4 LT |
314 | { |
315 | struct inet_sock *inet = inet_sk(sk); | |
316 | struct ipv6_pinfo *np = inet6_sk(sk); | |
317 | int err; | |
318 | int harderr; | |
319 | ||
320 | /* Report error on raw socket, if: | |
321 | 1. User requested recverr. | |
322 | 2. Socket is connected (otherwise the error indication | |
323 | is useless without recverr and error is hard. | |
324 | */ | |
325 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) | |
326 | return; | |
327 | ||
328 | harderr = icmpv6_err_convert(type, code, &err); | |
81aded24 DM |
329 | if (type == ICMPV6_PKT_TOOBIG) { |
330 | ip6_sk_update_pmtu(skb, sk, info); | |
1da177e4 | 331 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); |
81aded24 | 332 | } |
ec18d9a2 DM |
333 | if (type == NDISC_REDIRECT) |
334 | ip6_sk_redirect(skb, sk); | |
1da177e4 LT |
335 | if (np->recverr) { |
336 | u8 *payload = skb->data; | |
337 | if (!inet->hdrincl) | |
338 | payload += offset; | |
339 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); | |
340 | } | |
341 | ||
342 | if (np->recverr || harderr) { | |
343 | sk->sk_err = err; | |
344 | sk->sk_error_report(sk); | |
345 | } | |
346 | } | |
347 | ||
69d6da0b | 348 | void raw6_icmp_error(struct sk_buff *skb, int nexthdr, |
d5fdd6ba | 349 | u8 type, u8 code, int inner_offset, __be32 info) |
69d6da0b PE |
350 | { |
351 | struct sock *sk; | |
352 | int hash; | |
b71d1d42 | 353 | const struct in6_addr *saddr, *daddr; |
be185884 | 354 | struct net *net; |
69d6da0b | 355 | |
b673e4df | 356 | hash = nexthdr & (RAW_HTABLE_SIZE - 1); |
69d6da0b | 357 | |
b673e4df PE |
358 | read_lock(&raw_v6_hashinfo.lock); |
359 | sk = sk_head(&raw_v6_hashinfo.ht[hash]); | |
69d6da0b | 360 | if (sk != NULL) { |
05f175cd | 361 | /* Note: ipv6_hdr(skb) != skb->data */ |
b71d1d42 | 362 | const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data; |
05f175cd YH |
363 | saddr = &ip6h->saddr; |
364 | daddr = &ip6h->daddr; | |
c346dca1 | 365 | net = dev_net(skb->dev); |
69d6da0b | 366 | |
be185884 | 367 | while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr, |
69d6da0b PE |
368 | IP6CB(skb)->iif))) { |
369 | rawv6_err(sk, skb, NULL, type, code, | |
370 | inner_offset, info); | |
371 | sk = sk_next(sk); | |
372 | } | |
373 | } | |
b673e4df | 374 | read_unlock(&raw_v6_hashinfo.lock); |
69d6da0b PE |
375 | } |
376 | ||
33d480ce | 377 | static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 | 378 | { |
33d480ce | 379 | if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) && |
fb286bb2 | 380 | skb_checksum_complete(skb)) { |
a92aa318 | 381 | atomic_inc(&sk->sk_drops); |
fb286bb2 | 382 | kfree_skb(skb); |
3cc76caa | 383 | return NET_RX_DROP; |
1da177e4 LT |
384 | } |
385 | ||
386 | /* Charge it to the socket. */ | |
d826eb14 ED |
387 | skb_dst_drop(skb); |
388 | if (sock_queue_rcv_skb(sk, skb) < 0) { | |
1da177e4 | 389 | kfree_skb(skb); |
3cc76caa | 390 | return NET_RX_DROP; |
1da177e4 LT |
391 | } |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | /* | |
1ab1457c | 397 | * This is next to useless... |
1da177e4 | 398 | * if we demultiplex in network layer we don't need the extra call |
1ab1457c YH |
399 | * just to queue the skb... |
400 | * maybe we could have the network decide upon a hint if it | |
1da177e4 LT |
401 | * should call raw_rcv for demultiplexing |
402 | */ | |
403 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) | |
404 | { | |
405 | struct inet_sock *inet = inet_sk(sk); | |
406 | struct raw6_sock *rp = raw6_sk(sk); | |
407 | ||
1ab1457c | 408 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
a92aa318 | 409 | atomic_inc(&sk->sk_drops); |
1ab1457c YH |
410 | kfree_skb(skb); |
411 | return NET_RX_DROP; | |
412 | } | |
1da177e4 LT |
413 | |
414 | if (!rp->checksum) | |
415 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
416 | ||
84fa7933 | 417 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
d56f90a7 | 418 | skb_postpull_rcsum(skb, skb_network_header(skb), |
cfe1fc77 | 419 | skb_network_header_len(skb)); |
0660e03f ACM |
420 | if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
421 | &ipv6_hdr(skb)->daddr, | |
c720c7e8 | 422 | skb->len, inet->inet_num, skb->csum)) |
1da177e4 | 423 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 | 424 | } |
60476372 | 425 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
426 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
427 | &ipv6_hdr(skb)->daddr, | |
428 | skb->len, | |
c720c7e8 | 429 | inet->inet_num, 0)); |
1da177e4 LT |
430 | |
431 | if (inet->hdrincl) { | |
fb286bb2 | 432 | if (skb_checksum_complete(skb)) { |
a92aa318 | 433 | atomic_inc(&sk->sk_drops); |
1da177e4 | 434 | kfree_skb(skb); |
3cc76caa | 435 | return NET_RX_DROP; |
1da177e4 | 436 | } |
1da177e4 LT |
437 | } |
438 | ||
439 | rawv6_rcv_skb(sk, skb); | |
440 | return 0; | |
441 | } | |
442 | ||
443 | ||
444 | /* | |
445 | * This should be easy, if there is something there | |
446 | * we return it, otherwise we block. | |
447 | */ | |
448 | ||
449 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, | |
450 | struct msghdr *msg, size_t len, | |
451 | int noblock, int flags, int *addr_len) | |
452 | { | |
453 | struct ipv6_pinfo *np = inet6_sk(sk); | |
454 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; | |
455 | struct sk_buff *skb; | |
456 | size_t copied; | |
457 | int err; | |
458 | ||
459 | if (flags & MSG_OOB) | |
460 | return -EOPNOTSUPP; | |
1ab1457c YH |
461 | |
462 | if (addr_len) | |
1da177e4 LT |
463 | *addr_len=sizeof(*sin6); |
464 | ||
465 | if (flags & MSG_ERRQUEUE) | |
466 | return ipv6_recv_error(sk, msg, len); | |
467 | ||
4b340ae2 BH |
468 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
469 | return ipv6_recv_rxpmtu(sk, msg, len); | |
470 | ||
1da177e4 LT |
471 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
472 | if (!skb) | |
473 | goto out; | |
474 | ||
475 | copied = skb->len; | |
1ab1457c YH |
476 | if (copied > len) { |
477 | copied = len; | |
478 | msg->msg_flags |= MSG_TRUNC; | |
479 | } | |
1da177e4 | 480 | |
60476372 | 481 | if (skb_csum_unnecessary(skb)) { |
1da177e4 LT |
482 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
483 | } else if (msg->msg_flags&MSG_TRUNC) { | |
fb286bb2 | 484 | if (__skb_checksum_complete(skb)) |
1da177e4 LT |
485 | goto csum_copy_err; |
486 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
487 | } else { | |
488 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); | |
489 | if (err == -EINVAL) | |
490 | goto csum_copy_err; | |
491 | } | |
492 | if (err) | |
493 | goto out_free; | |
494 | ||
495 | /* Copy the address. */ | |
496 | if (sin6) { | |
497 | sin6->sin6_family = AF_INET6; | |
f59fc7f3 | 498 | sin6->sin6_port = 0; |
4e3fd7a0 | 499 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
1da177e4 | 500 | sin6->sin6_flowinfo = 0; |
842df073 HFS |
501 | sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr, |
502 | IP6CB(skb)->iif); | |
1da177e4 LT |
503 | } |
504 | ||
3b885787 | 505 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
506 | |
507 | if (np->rxopt.all) | |
73df66f8 | 508 | ip6_datagram_recv_ctl(sk, msg, skb); |
1da177e4 LT |
509 | |
510 | err = copied; | |
511 | if (flags & MSG_TRUNC) | |
512 | err = skb->len; | |
513 | ||
514 | out_free: | |
515 | skb_free_datagram(sk, skb); | |
516 | out: | |
517 | return err; | |
518 | ||
519 | csum_copy_err: | |
3305b80c | 520 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
521 | |
522 | /* Error for blocking case is chosen to masquerade | |
523 | as some normal condition. | |
524 | */ | |
525 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; | |
3305b80c | 526 | goto out; |
1da177e4 LT |
527 | } |
528 | ||
4c9483b2 | 529 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6, |
357b40a1 | 530 | struct raw6_sock *rp) |
1da177e4 LT |
531 | { |
532 | struct sk_buff *skb; | |
533 | int err = 0; | |
357b40a1 HX |
534 | int offset; |
535 | int len; | |
679a8738 | 536 | int total_len; |
868c86bc AV |
537 | __wsum tmp_csum; |
538 | __sum16 csum; | |
1da177e4 LT |
539 | |
540 | if (!rp->checksum) | |
541 | goto send; | |
542 | ||
543 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
544 | goto out; | |
545 | ||
357b40a1 | 546 | offset = rp->offset; |
299b0767 | 547 | total_len = inet_sk(sk)->cork.base.length; |
679a8738 | 548 | if (offset >= total_len - 1) { |
1da177e4 | 549 | err = -EINVAL; |
357b40a1 | 550 | ip6_flush_pending_frames(sk); |
1da177e4 LT |
551 | goto out; |
552 | } | |
553 | ||
554 | /* should be check HW csum miyazawa */ | |
555 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
556 | /* | |
557 | * Only one fragment on the socket. | |
558 | */ | |
559 | tmp_csum = skb->csum; | |
560 | } else { | |
357b40a1 | 561 | struct sk_buff *csum_skb = NULL; |
1da177e4 LT |
562 | tmp_csum = 0; |
563 | ||
564 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
565 | tmp_csum = csum_add(tmp_csum, skb->csum); | |
357b40a1 HX |
566 | |
567 | if (csum_skb) | |
568 | continue; | |
569 | ||
ea2ae17d | 570 | len = skb->len - skb_transport_offset(skb); |
357b40a1 HX |
571 | if (offset >= len) { |
572 | offset -= len; | |
573 | continue; | |
574 | } | |
575 | ||
576 | csum_skb = skb; | |
1da177e4 | 577 | } |
357b40a1 HX |
578 | |
579 | skb = csum_skb; | |
1da177e4 LT |
580 | } |
581 | ||
ea2ae17d | 582 | offset += skb_transport_offset(skb); |
357b40a1 HX |
583 | if (skb_copy_bits(skb, offset, &csum, 2)) |
584 | BUG(); | |
585 | ||
1da177e4 | 586 | /* in case cksum was not initialized */ |
357b40a1 | 587 | if (unlikely(csum)) |
5f92a738 | 588 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
357b40a1 | 589 | |
4c9483b2 DM |
590 | csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
591 | total_len, fl6->flowi6_proto, tmp_csum); | |
357b40a1 | 592 | |
4c9483b2 | 593 | if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP) |
f6ab0288 | 594 | csum = CSUM_MANGLED_0; |
1da177e4 | 595 | |
357b40a1 HX |
596 | if (skb_store_bits(skb, offset, &csum, 2)) |
597 | BUG(); | |
1da177e4 | 598 | |
1da177e4 LT |
599 | send: |
600 | err = ip6_push_pending_frames(sk); | |
601 | out: | |
602 | return err; | |
603 | } | |
604 | ||
605 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, | |
4c9483b2 | 606 | struct flowi6 *fl6, struct dst_entry **dstp, |
1da177e4 LT |
607 | unsigned int flags) |
608 | { | |
3320da89 | 609 | struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
610 | struct ipv6hdr *iph; |
611 | struct sk_buff *skb; | |
1da177e4 | 612 | int err; |
1789a640 | 613 | struct rt6_info *rt = (struct rt6_info *)*dstp; |
a7ae1992 HX |
614 | int hlen = LL_RESERVED_SPACE(rt->dst.dev); |
615 | int tlen = rt->dst.dev->needed_tailroom; | |
1da177e4 | 616 | |
d8d1f30b | 617 | if (length > rt->dst.dev->mtu) { |
4c9483b2 | 618 | ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu); |
1da177e4 LT |
619 | return -EMSGSIZE; |
620 | } | |
621 | if (flags&MSG_PROBE) | |
622 | goto out; | |
623 | ||
f5184d26 | 624 | skb = sock_alloc_send_skb(sk, |
a7ae1992 | 625 | length + hlen + tlen + 15, |
f5184d26 | 626 | flags & MSG_DONTWAIT, &err); |
1da177e4 | 627 | if (skb == NULL) |
1ab1457c | 628 | goto error; |
a7ae1992 | 629 | skb_reserve(skb, hlen); |
1da177e4 LT |
630 | |
631 | skb->priority = sk->sk_priority; | |
4a19ec58 | 632 | skb->mark = sk->sk_mark; |
d8d1f30b | 633 | skb_dst_set(skb, &rt->dst); |
1789a640 | 634 | *dstp = NULL; |
1da177e4 | 635 | |
1ced98e8 ACM |
636 | skb_put(skb, length); |
637 | skb_reset_network_header(skb); | |
0660e03f | 638 | iph = ipv6_hdr(skb); |
1da177e4 LT |
639 | |
640 | skb->ip_summed = CHECKSUM_NONE; | |
641 | ||
b0e380b1 | 642 | skb->transport_header = skb->network_header; |
1da177e4 LT |
643 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
644 | if (err) | |
645 | goto error_fault; | |
646 | ||
edf391ff | 647 | IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len); |
b2e0b385 | 648 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, |
d8d1f30b | 649 | rt->dst.dev, dst_output); |
1da177e4 | 650 | if (err > 0) |
6ce9e7b5 | 651 | err = net_xmit_errno(err); |
1da177e4 LT |
652 | if (err) |
653 | goto error; | |
654 | out: | |
655 | return 0; | |
656 | ||
657 | error_fault: | |
658 | err = -EFAULT; | |
659 | kfree_skb(skb); | |
660 | error: | |
3bd653c8 | 661 | IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
6ce9e7b5 ED |
662 | if (err == -ENOBUFS && !np->recverr) |
663 | err = 0; | |
1ab1457c | 664 | return err; |
1da177e4 LT |
665 | } |
666 | ||
4c9483b2 | 667 | static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg) |
1da177e4 LT |
668 | { |
669 | struct iovec *iov; | |
670 | u8 __user *type = NULL; | |
671 | u8 __user *code = NULL; | |
6e8f4d48 | 672 | u8 len = 0; |
1da177e4 LT |
673 | int probed = 0; |
674 | int i; | |
675 | ||
676 | if (!msg->msg_iov) | |
a27b58fe | 677 | return 0; |
1da177e4 LT |
678 | |
679 | for (i = 0; i < msg->msg_iovlen; i++) { | |
680 | iov = &msg->msg_iov[i]; | |
681 | if (!iov) | |
682 | continue; | |
683 | ||
4c9483b2 | 684 | switch (fl6->flowi6_proto) { |
1da177e4 LT |
685 | case IPPROTO_ICMPV6: |
686 | /* check if one-byte field is readable or not. */ | |
687 | if (iov->iov_base && iov->iov_len < 1) | |
688 | break; | |
689 | ||
690 | if (!type) { | |
691 | type = iov->iov_base; | |
692 | /* check if code field is readable or not. */ | |
693 | if (iov->iov_len > 1) | |
694 | code = type + 1; | |
695 | } else if (!code) | |
696 | code = iov->iov_base; | |
697 | ||
698 | if (type && code) { | |
1958b856 DM |
699 | if (get_user(fl6->fl6_icmp_type, type) || |
700 | get_user(fl6->fl6_icmp_code, code)) | |
a27b58fe | 701 | return -EFAULT; |
1da177e4 LT |
702 | probed = 1; |
703 | } | |
704 | break; | |
6e8f4d48 MN |
705 | case IPPROTO_MH: |
706 | if (iov->iov_base && iov->iov_len < 1) | |
707 | break; | |
708 | /* check if type field is readable or not. */ | |
709 | if (iov->iov_len > 2 - len) { | |
710 | u8 __user *p = iov->iov_base; | |
1958b856 | 711 | if (get_user(fl6->fl6_mh_type, &p[2 - len])) |
a27b58fe | 712 | return -EFAULT; |
6e8f4d48 MN |
713 | probed = 1; |
714 | } else | |
715 | len += iov->iov_len; | |
716 | ||
717 | break; | |
1da177e4 LT |
718 | default: |
719 | probed = 1; | |
720 | break; | |
721 | } | |
722 | if (probed) | |
723 | break; | |
724 | } | |
a27b58fe | 725 | return 0; |
1da177e4 LT |
726 | } |
727 | ||
728 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, | |
729 | struct msghdr *msg, size_t len) | |
730 | { | |
731 | struct ipv6_txoptions opt_space; | |
732 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
20c59de2 | 733 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
734 | struct inet_sock *inet = inet_sk(sk); |
735 | struct ipv6_pinfo *np = inet6_sk(sk); | |
736 | struct raw6_sock *rp = raw6_sk(sk); | |
737 | struct ipv6_txoptions *opt = NULL; | |
738 | struct ip6_flowlabel *flowlabel = NULL; | |
739 | struct dst_entry *dst = NULL; | |
4c9483b2 | 740 | struct flowi6 fl6; |
1da177e4 LT |
741 | int addr_len = msg->msg_namelen; |
742 | int hlimit = -1; | |
41a1f8ea | 743 | int tclass = -1; |
13b52cd4 | 744 | int dontfrag = -1; |
1da177e4 LT |
745 | u16 proto; |
746 | int err; | |
747 | ||
748 | /* Rough check on arithmetic overflow, | |
b59e139b | 749 | better check is made in ip6_append_data(). |
1da177e4 | 750 | */ |
b59e139b | 751 | if (len > INT_MAX) |
1da177e4 LT |
752 | return -EMSGSIZE; |
753 | ||
754 | /* Mirror BSD error message compatibility */ | |
1ab1457c | 755 | if (msg->msg_flags & MSG_OOB) |
1da177e4 LT |
756 | return -EOPNOTSUPP; |
757 | ||
758 | /* | |
1ab1457c | 759 | * Get and verify the address. |
1da177e4 | 760 | */ |
4c9483b2 | 761 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 | 762 | |
4c9483b2 | 763 | fl6.flowi6_mark = sk->sk_mark; |
4a19ec58 | 764 | |
1da177e4 | 765 | if (sin6) { |
1ab1457c | 766 | if (addr_len < SIN6_LEN_RFC2133) |
1da177e4 LT |
767 | return -EINVAL; |
768 | ||
1ab1457c | 769 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
a02cec21 | 770 | return -EAFNOSUPPORT; |
1da177e4 LT |
771 | |
772 | /* port is the proto value [0..255] carried in nexthdr */ | |
773 | proto = ntohs(sin6->sin6_port); | |
774 | ||
775 | if (!proto) | |
c720c7e8 ED |
776 | proto = inet->inet_num; |
777 | else if (proto != inet->inet_num) | |
a02cec21 | 778 | return -EINVAL; |
1da177e4 LT |
779 | |
780 | if (proto > 255) | |
a02cec21 | 781 | return -EINVAL; |
1da177e4 LT |
782 | |
783 | daddr = &sin6->sin6_addr; | |
784 | if (np->sndflow) { | |
4c9483b2 DM |
785 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
786 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
787 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
788 | if (flowlabel == NULL) |
789 | return -EINVAL; | |
790 | daddr = &flowlabel->dst; | |
791 | } | |
792 | } | |
793 | ||
794 | /* | |
795 | * Otherwise it will be difficult to maintain | |
796 | * sk->sk_dst_cache. | |
797 | */ | |
798 | if (sk->sk_state == TCP_ESTABLISHED && | |
799 | ipv6_addr_equal(daddr, &np->daddr)) | |
800 | daddr = &np->daddr; | |
801 | ||
802 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
803 | sin6->sin6_scope_id && | |
842df073 | 804 | __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) |
4c9483b2 | 805 | fl6.flowi6_oif = sin6->sin6_scope_id; |
1da177e4 | 806 | } else { |
1ab1457c | 807 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 808 | return -EDESTADDRREQ; |
1ab1457c | 809 | |
c720c7e8 | 810 | proto = inet->inet_num; |
1da177e4 | 811 | daddr = &np->daddr; |
4c9483b2 | 812 | fl6.flowlabel = np->flow_label; |
1da177e4 LT |
813 | } |
814 | ||
4c9483b2 DM |
815 | if (fl6.flowi6_oif == 0) |
816 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
817 | |
818 | if (msg->msg_controllen) { | |
819 | opt = &opt_space; | |
820 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
821 | opt->tot_len = sizeof(struct ipv6_txoptions); | |
822 | ||
73df66f8 TP |
823 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, |
824 | &hlimit, &tclass, &dontfrag); | |
1da177e4 LT |
825 | if (err < 0) { |
826 | fl6_sock_release(flowlabel); | |
827 | return err; | |
828 | } | |
4c9483b2 DM |
829 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
830 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
831 | if (flowlabel == NULL) |
832 | return -EINVAL; | |
833 | } | |
834 | if (!(opt->opt_nflen|opt->opt_flen)) | |
835 | opt = NULL; | |
836 | } | |
837 | if (opt == NULL) | |
838 | opt = np->opt; | |
df9890c3 YH |
839 | if (flowlabel) |
840 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
841 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 842 | |
4c9483b2 DM |
843 | fl6.flowi6_proto = proto; |
844 | err = rawv6_probe_proto_opt(&fl6, msg); | |
a27b58fe HC |
845 | if (err) |
846 | goto out; | |
1ab1457c | 847 | |
876c7f41 | 848 | if (!ipv6_addr_any(daddr)) |
4e3fd7a0 | 849 | fl6.daddr = *daddr; |
876c7f41 | 850 | else |
4c9483b2 DM |
851 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
852 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
4e3fd7a0 | 853 | fl6.saddr = np->saddr; |
1da177e4 | 854 | |
4c9483b2 | 855 | final_p = fl6_update_dst(&fl6, opt, &final); |
1da177e4 | 856 | |
4c9483b2 DM |
857 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) |
858 | fl6.flowi6_oif = np->mcast_oif; | |
c4062dfc EH |
859 | else if (!fl6.flowi6_oif) |
860 | fl6.flowi6_oif = np->ucast_oif; | |
4c9483b2 | 861 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
1da177e4 | 862 | |
4c9483b2 | 863 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true); |
68d0c6d3 DM |
864 | if (IS_ERR(dst)) { |
865 | err = PTR_ERR(dst); | |
1da177e4 | 866 | goto out; |
14e50e57 | 867 | } |
1da177e4 | 868 | if (hlimit < 0) { |
4c9483b2 | 869 | if (ipv6_addr_is_multicast(&fl6.daddr)) |
1da177e4 LT |
870 | hlimit = np->mcast_hops; |
871 | else | |
872 | hlimit = np->hop_limit; | |
873 | if (hlimit < 0) | |
6b75d090 | 874 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
875 | } |
876 | ||
e651f03a | 877 | if (tclass < 0) |
e012d51c | 878 | tclass = np->tclass; |
41a1f8ea | 879 | |
13b52cd4 BH |
880 | if (dontfrag < 0) |
881 | dontfrag = np->dontfrag; | |
882 | ||
1da177e4 LT |
883 | if (msg->msg_flags&MSG_CONFIRM) |
884 | goto do_confirm; | |
885 | ||
886 | back_from_confirm: | |
1789a640 | 887 | if (inet->hdrincl) |
4c9483b2 | 888 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags); |
1789a640 | 889 | else { |
1da177e4 | 890 | lock_sock(sk); |
41a1f8ea | 891 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
4c9483b2 | 892 | len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info*)dst, |
13b52cd4 | 893 | msg->msg_flags, dontfrag); |
1da177e4 LT |
894 | |
895 | if (err) | |
896 | ip6_flush_pending_frames(sk); | |
897 | else if (!(msg->msg_flags & MSG_MORE)) | |
4c9483b2 | 898 | err = rawv6_push_pending_frames(sk, &fl6, rp); |
3ef9d943 | 899 | release_sock(sk); |
1da177e4 LT |
900 | } |
901 | done: | |
6d3e85ec | 902 | dst_release(dst); |
1ab1457c | 903 | out: |
1da177e4 LT |
904 | fl6_sock_release(flowlabel); |
905 | return err<0?err:len; | |
906 | do_confirm: | |
907 | dst_confirm(dst); | |
908 | if (!(msg->msg_flags & MSG_PROBE) || len) | |
909 | goto back_from_confirm; | |
910 | err = 0; | |
911 | goto done; | |
912 | } | |
913 | ||
1ab1457c | 914 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
915 | char __user *optval, int optlen) |
916 | { | |
917 | switch (optname) { | |
918 | case ICMPV6_FILTER: | |
919 | if (optlen > sizeof(struct icmp6_filter)) | |
920 | optlen = sizeof(struct icmp6_filter); | |
921 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) | |
922 | return -EFAULT; | |
923 | return 0; | |
924 | default: | |
925 | return -ENOPROTOOPT; | |
3ff50b79 | 926 | } |
1da177e4 LT |
927 | |
928 | return 0; | |
929 | } | |
930 | ||
1ab1457c | 931 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
1da177e4 LT |
932 | char __user *optval, int __user *optlen) |
933 | { | |
934 | int len; | |
935 | ||
936 | switch (optname) { | |
937 | case ICMPV6_FILTER: | |
938 | if (get_user(len, optlen)) | |
939 | return -EFAULT; | |
940 | if (len < 0) | |
941 | return -EINVAL; | |
942 | if (len > sizeof(struct icmp6_filter)) | |
943 | len = sizeof(struct icmp6_filter); | |
944 | if (put_user(len, optlen)) | |
945 | return -EFAULT; | |
946 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) | |
947 | return -EFAULT; | |
948 | return 0; | |
949 | default: | |
950 | return -ENOPROTOOPT; | |
3ff50b79 | 951 | } |
1da177e4 LT |
952 | |
953 | return 0; | |
954 | } | |
955 | ||
956 | ||
3fdadf7d | 957 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 958 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
959 | { |
960 | struct raw6_sock *rp = raw6_sk(sk); | |
961 | int val; | |
962 | ||
1ab1457c | 963 | if (get_user(val, (int __user *)optval)) |
1da177e4 LT |
964 | return -EFAULT; |
965 | ||
966 | switch (optname) { | |
207ec0ab JP |
967 | case IPV6_CHECKSUM: |
968 | if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 && | |
969 | level == IPPROTO_IPV6) { | |
970 | /* | |
971 | * RFC3542 tells that IPV6_CHECKSUM socket | |
972 | * option in the IPPROTO_IPV6 level is not | |
973 | * allowed on ICMPv6 sockets. | |
974 | * If you want to set it, use IPPROTO_RAW | |
975 | * level IPV6_CHECKSUM socket option | |
976 | * (Linux extension). | |
977 | */ | |
978 | return -EINVAL; | |
979 | } | |
1a98d05f | 980 | |
207ec0ab JP |
981 | /* You may get strange result with a positive odd offset; |
982 | RFC2292bis agrees with me. */ | |
983 | if (val > 0 && (val&1)) | |
984 | return -EINVAL; | |
985 | if (val < 0) { | |
986 | rp->checksum = 0; | |
987 | } else { | |
988 | rp->checksum = 1; | |
989 | rp->offset = val; | |
990 | } | |
1da177e4 | 991 | |
207ec0ab | 992 | return 0; |
1da177e4 | 993 | |
207ec0ab JP |
994 | default: |
995 | return -ENOPROTOOPT; | |
1da177e4 LT |
996 | } |
997 | } | |
998 | ||
3fdadf7d | 999 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1000 | char __user *optval, unsigned int optlen) |
1da177e4 | 1001 | { |
207ec0ab JP |
1002 | switch (level) { |
1003 | case SOL_RAW: | |
1004 | break; | |
1da177e4 | 1005 | |
207ec0ab JP |
1006 | case SOL_ICMPV6: |
1007 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1008 | return -EOPNOTSUPP; | |
1009 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1010 | case SOL_IPV6: | |
1011 | if (optname == IPV6_CHECKSUM) | |
1012 | break; | |
1013 | default: | |
1014 | return ipv6_setsockopt(sk, level, optname, optval, optlen); | |
3ff50b79 SH |
1015 | } |
1016 | ||
3fdadf7d DM |
1017 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1018 | } | |
1019 | ||
1020 | #ifdef CONFIG_COMPAT | |
1021 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 1022 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1023 | { |
543d9cfe ACM |
1024 | switch (level) { |
1025 | case SOL_RAW: | |
1026 | break; | |
1027 | case SOL_ICMPV6: | |
c720c7e8 | 1028 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
543d9cfe ACM |
1029 | return -EOPNOTSUPP; |
1030 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); | |
1031 | case SOL_IPV6: | |
1032 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1033 | break; |
543d9cfe ACM |
1034 | default: |
1035 | return compat_ipv6_setsockopt(sk, level, optname, | |
1036 | optval, optlen); | |
3ff50b79 | 1037 | } |
3fdadf7d DM |
1038 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
1039 | } | |
1040 | #endif | |
1041 | ||
1042 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
1043 | char __user *optval, int __user *optlen) | |
1044 | { | |
1045 | struct raw6_sock *rp = raw6_sk(sk); | |
1046 | int val, len; | |
1da177e4 LT |
1047 | |
1048 | if (get_user(len,optlen)) | |
1049 | return -EFAULT; | |
1050 | ||
1051 | switch (optname) { | |
1052 | case IPV6_CHECKSUM: | |
1a98d05f YH |
1053 | /* |
1054 | * We allow getsockopt() for IPPROTO_IPV6-level | |
1055 | * IPV6_CHECKSUM socket option on ICMPv6 sockets | |
1056 | * since RFC3542 is silent about it. | |
1057 | */ | |
1da177e4 LT |
1058 | if (rp->checksum == 0) |
1059 | val = -1; | |
1060 | else | |
1061 | val = rp->offset; | |
1062 | break; | |
1063 | ||
1064 | default: | |
1065 | return -ENOPROTOOPT; | |
1066 | } | |
1067 | ||
1068 | len = min_t(unsigned int, sizeof(int), len); | |
1069 | ||
1070 | if (put_user(len, optlen)) | |
1071 | return -EFAULT; | |
1072 | if (copy_to_user(optval,&val,len)) | |
1073 | return -EFAULT; | |
1074 | return 0; | |
1075 | } | |
1076 | ||
3fdadf7d DM |
1077 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
1078 | char __user *optval, int __user *optlen) | |
1079 | { | |
207ec0ab JP |
1080 | switch (level) { |
1081 | case SOL_RAW: | |
1082 | break; | |
3fdadf7d | 1083 | |
207ec0ab JP |
1084 | case SOL_ICMPV6: |
1085 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) | |
1086 | return -EOPNOTSUPP; | |
1087 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1088 | case SOL_IPV6: | |
1089 | if (optname == IPV6_CHECKSUM) | |
1090 | break; | |
1091 | default: | |
1092 | return ipv6_getsockopt(sk, level, optname, optval, optlen); | |
3ff50b79 SH |
1093 | } |
1094 | ||
3fdadf7d DM |
1095 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1096 | } | |
1097 | ||
1098 | #ifdef CONFIG_COMPAT | |
1099 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1100 | char __user *optval, int __user *optlen) |
3fdadf7d | 1101 | { |
543d9cfe ACM |
1102 | switch (level) { |
1103 | case SOL_RAW: | |
1104 | break; | |
1105 | case SOL_ICMPV6: | |
c720c7e8 | 1106 | if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6) |
543d9cfe ACM |
1107 | return -EOPNOTSUPP; |
1108 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); | |
1109 | case SOL_IPV6: | |
1110 | if (optname == IPV6_CHECKSUM) | |
3fdadf7d | 1111 | break; |
543d9cfe ACM |
1112 | default: |
1113 | return compat_ipv6_getsockopt(sk, level, optname, | |
1114 | optval, optlen); | |
3ff50b79 | 1115 | } |
3fdadf7d DM |
1116 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
1117 | } | |
1118 | #endif | |
1119 | ||
1da177e4 LT |
1120 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
1121 | { | |
207ec0ab JP |
1122 | switch (cmd) { |
1123 | case SIOCOUTQ: { | |
1124 | int amount = sk_wmem_alloc_get(sk); | |
31e6d363 | 1125 | |
207ec0ab JP |
1126 | return put_user(amount, (int __user *)arg); |
1127 | } | |
1128 | case SIOCINQ: { | |
1129 | struct sk_buff *skb; | |
1130 | int amount = 0; | |
1131 | ||
1132 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
1133 | skb = skb_peek(&sk->sk_receive_queue); | |
1134 | if (skb != NULL) | |
29a3cad5 SH |
1135 | amount = skb_tail_pointer(skb) - |
1136 | skb_transport_header(skb); | |
207ec0ab JP |
1137 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
1138 | return put_user(amount, (int __user *)arg); | |
1139 | } | |
1da177e4 | 1140 | |
207ec0ab | 1141 | default: |
7bc570c8 | 1142 | #ifdef CONFIG_IPV6_MROUTE |
207ec0ab | 1143 | return ip6mr_ioctl(sk, cmd, (void __user *)arg); |
7bc570c8 | 1144 | #else |
207ec0ab | 1145 | return -ENOIOCTLCMD; |
7bc570c8 | 1146 | #endif |
1da177e4 LT |
1147 | } |
1148 | } | |
1149 | ||
e2d57766 DM |
1150 | #ifdef CONFIG_COMPAT |
1151 | static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) | |
1152 | { | |
1153 | switch (cmd) { | |
1154 | case SIOCOUTQ: | |
1155 | case SIOCINQ: | |
1156 | return -ENOIOCTLCMD; | |
1157 | default: | |
1158 | #ifdef CONFIG_IPV6_MROUTE | |
1159 | return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg)); | |
1160 | #else | |
1161 | return -ENOIOCTLCMD; | |
1162 | #endif | |
1163 | } | |
1164 | } | |
1165 | #endif | |
1166 | ||
1da177e4 LT |
1167 | static void rawv6_close(struct sock *sk, long timeout) |
1168 | { | |
c720c7e8 | 1169 | if (inet_sk(sk)->inet_num == IPPROTO_RAW) |
725a8ff0 | 1170 | ip6_ra_control(sk, -1); |
7bc570c8 | 1171 | ip6mr_sk_done(sk); |
1da177e4 LT |
1172 | sk_common_release(sk); |
1173 | } | |
1174 | ||
7d06b2e0 | 1175 | static void raw6_destroy(struct sock *sk) |
22dd4850 DL |
1176 | { |
1177 | lock_sock(sk); | |
1178 | ip6_flush_pending_frames(sk); | |
1179 | release_sock(sk); | |
f23d60de | 1180 | |
7d06b2e0 | 1181 | inet6_destroy_sock(sk); |
22dd4850 DL |
1182 | } |
1183 | ||
1da177e4 LT |
1184 | static int rawv6_init_sk(struct sock *sk) |
1185 | { | |
f48d5ff1 MN |
1186 | struct raw6_sock *rp = raw6_sk(sk); |
1187 | ||
c720c7e8 | 1188 | switch (inet_sk(sk)->inet_num) { |
f48d5ff1 | 1189 | case IPPROTO_ICMPV6: |
1da177e4 LT |
1190 | rp->checksum = 1; |
1191 | rp->offset = 2; | |
f48d5ff1 MN |
1192 | break; |
1193 | case IPPROTO_MH: | |
1194 | rp->checksum = 1; | |
1195 | rp->offset = 4; | |
1196 | break; | |
1197 | default: | |
1198 | break; | |
1da177e4 | 1199 | } |
a02cec21 | 1200 | return 0; |
1da177e4 LT |
1201 | } |
1202 | ||
1203 | struct proto rawv6_prot = { | |
543d9cfe ACM |
1204 | .name = "RAWv6", |
1205 | .owner = THIS_MODULE, | |
1206 | .close = rawv6_close, | |
22dd4850 | 1207 | .destroy = raw6_destroy, |
543d9cfe ACM |
1208 | .connect = ip6_datagram_connect, |
1209 | .disconnect = udp_disconnect, | |
1210 | .ioctl = rawv6_ioctl, | |
1211 | .init = rawv6_init_sk, | |
543d9cfe ACM |
1212 | .setsockopt = rawv6_setsockopt, |
1213 | .getsockopt = rawv6_getsockopt, | |
1214 | .sendmsg = rawv6_sendmsg, | |
1215 | .recvmsg = rawv6_recvmsg, | |
1216 | .bind = rawv6_bind, | |
1217 | .backlog_rcv = rawv6_rcv_skb, | |
fc8717ba PE |
1218 | .hash = raw_hash_sk, |
1219 | .unhash = raw_unhash_sk, | |
543d9cfe | 1220 | .obj_size = sizeof(struct raw6_sock), |
fc8717ba | 1221 | .h.raw_hash = &raw_v6_hashinfo, |
3fdadf7d | 1222 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1223 | .compat_setsockopt = compat_rawv6_setsockopt, |
1224 | .compat_getsockopt = compat_rawv6_getsockopt, | |
e2d57766 | 1225 | .compat_ioctl = compat_rawv6_ioctl, |
3fdadf7d | 1226 | #endif |
1da177e4 LT |
1227 | }; |
1228 | ||
1229 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
1230 | static int raw6_seq_show(struct seq_file *seq, void *v) |
1231 | { | |
17ef66af LC |
1232 | if (v == SEQ_START_TOKEN) { |
1233 | seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); | |
1234 | } else { | |
1235 | struct sock *sp = v; | |
1236 | __u16 srcp = inet_sk(sp)->inet_num; | |
1237 | ip6_dgram_sock_seq_show(seq, v, srcp, 0, | |
1238 | raw_seq_private(seq)->bucket); | |
1239 | } | |
1da177e4 LT |
1240 | return 0; |
1241 | } | |
1242 | ||
56b3d975 | 1243 | static const struct seq_operations raw6_seq_ops = { |
42a73808 PE |
1244 | .start = raw_seq_start, |
1245 | .next = raw_seq_next, | |
1246 | .stop = raw_seq_stop, | |
1da177e4 LT |
1247 | .show = raw6_seq_show, |
1248 | }; | |
1249 | ||
1250 | static int raw6_seq_open(struct inode *inode, struct file *file) | |
1251 | { | |
3046d767 | 1252 | return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops); |
1da177e4 LT |
1253 | } |
1254 | ||
9a32144e | 1255 | static const struct file_operations raw6_seq_fops = { |
1da177e4 LT |
1256 | .owner = THIS_MODULE, |
1257 | .open = raw6_seq_open, | |
1258 | .read = seq_read, | |
1259 | .llseek = seq_lseek, | |
f51d599f | 1260 | .release = seq_release_net, |
1da177e4 LT |
1261 | }; |
1262 | ||
2c8c1e72 | 1263 | static int __net_init raw6_init_net(struct net *net) |
1da177e4 | 1264 | { |
d4beaa66 | 1265 | if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops)) |
1da177e4 | 1266 | return -ENOMEM; |
a308da16 | 1267 | |
1da177e4 LT |
1268 | return 0; |
1269 | } | |
1270 | ||
2c8c1e72 | 1271 | static void __net_exit raw6_exit_net(struct net *net) |
a308da16 | 1272 | { |
ece31ffd | 1273 | remove_proc_entry("raw6", net->proc_net); |
a308da16 PE |
1274 | } |
1275 | ||
1276 | static struct pernet_operations raw6_net_ops = { | |
1277 | .init = raw6_init_net, | |
1278 | .exit = raw6_exit_net, | |
1279 | }; | |
1280 | ||
1281 | int __init raw6_proc_init(void) | |
1282 | { | |
1283 | return register_pernet_subsys(&raw6_net_ops); | |
1284 | } | |
1285 | ||
1da177e4 LT |
1286 | void raw6_proc_exit(void) |
1287 | { | |
a308da16 | 1288 | unregister_pernet_subsys(&raw6_net_ops); |
1da177e4 LT |
1289 | } |
1290 | #endif /* CONFIG_PROC_FS */ | |
7f4e4868 DL |
1291 | |
1292 | /* Same as inet6_dgram_ops, sans udp_poll. */ | |
1293 | static const struct proto_ops inet6_sockraw_ops = { | |
1294 | .family = PF_INET6, | |
1295 | .owner = THIS_MODULE, | |
1296 | .release = inet6_release, | |
1297 | .bind = inet6_bind, | |
1298 | .connect = inet_dgram_connect, /* ok */ | |
1299 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
1300 | .accept = sock_no_accept, /* a do nothing */ | |
1301 | .getname = inet6_getname, | |
1302 | .poll = datagram_poll, /* ok */ | |
1303 | .ioctl = inet6_ioctl, /* must change */ | |
1304 | .listen = sock_no_listen, /* ok */ | |
1305 | .shutdown = inet_shutdown, /* ok */ | |
1306 | .setsockopt = sock_common_setsockopt, /* ok */ | |
1307 | .getsockopt = sock_common_getsockopt, /* ok */ | |
1308 | .sendmsg = inet_sendmsg, /* ok */ | |
1309 | .recvmsg = sock_common_recvmsg, /* ok */ | |
1310 | .mmap = sock_no_mmap, | |
1311 | .sendpage = sock_no_sendpage, | |
1312 | #ifdef CONFIG_COMPAT | |
1313 | .compat_setsockopt = compat_sock_common_setsockopt, | |
1314 | .compat_getsockopt = compat_sock_common_getsockopt, | |
1315 | #endif | |
1316 | }; | |
1317 | ||
1318 | static struct inet_protosw rawv6_protosw = { | |
1319 | .type = SOCK_RAW, | |
1320 | .protocol = IPPROTO_IP, /* wild card */ | |
1321 | .prot = &rawv6_prot, | |
1322 | .ops = &inet6_sockraw_ops, | |
7f4e4868 DL |
1323 | .no_check = UDP_CSUM_DEFAULT, |
1324 | .flags = INET_PROTOSW_REUSE, | |
1325 | }; | |
1326 | ||
1327 | int __init rawv6_init(void) | |
1328 | { | |
1329 | int ret; | |
1330 | ||
1331 | ret = inet6_register_protosw(&rawv6_protosw); | |
1332 | if (ret) | |
1333 | goto out; | |
1334 | out: | |
1335 | return ret; | |
1336 | } | |
1337 | ||
09f7709f | 1338 | void rawv6_exit(void) |
7f4e4868 DL |
1339 | { |
1340 | inet6_unregister_protosw(&rawv6_protosw); | |
1341 | } |