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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * common UDP/RAW code | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 | 7 | * |
1da177e4 LT |
8 | * This program is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
4fc268d2 | 14 | #include <linux/capability.h> |
1da177e4 LT |
15 | #include <linux/errno.h> |
16 | #include <linux/types.h> | |
17 | #include <linux/kernel.h> | |
1da177e4 LT |
18 | #include <linux/interrupt.h> |
19 | #include <linux/socket.h> | |
20 | #include <linux/sockios.h> | |
21 | #include <linux/in6.h> | |
22 | #include <linux/ipv6.h> | |
23 | #include <linux/route.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
a495f836 | 25 | #include <linux/export.h> |
1da177e4 LT |
26 | |
27 | #include <net/ipv6.h> | |
28 | #include <net/ndisc.h> | |
29 | #include <net/addrconf.h> | |
30 | #include <net/transp_v6.h> | |
31 | #include <net/ip6_route.h> | |
c752f073 | 32 | #include <net/tcp_states.h> |
e7219858 | 33 | #include <net/dsfield.h> |
1da177e4 LT |
34 | |
35 | #include <linux/errqueue.h> | |
7c0f6ba6 | 36 | #include <linux/uaccess.h> |
1da177e4 | 37 | |
a50feda5 | 38 | static bool ipv6_mapped_addr_any(const struct in6_addr *a) |
c15fea2d | 39 | { |
a50feda5 | 40 | return ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0); |
c15fea2d MM |
41 | } |
42 | ||
80fbdb20 MKL |
43 | static void ip6_datagram_flow_key_init(struct flowi6 *fl6, struct sock *sk) |
44 | { | |
45 | struct inet_sock *inet = inet_sk(sk); | |
46 | struct ipv6_pinfo *np = inet6_sk(sk); | |
47 | ||
48 | memset(fl6, 0, sizeof(*fl6)); | |
49 | fl6->flowi6_proto = sk->sk_protocol; | |
50 | fl6->daddr = sk->sk_v6_daddr; | |
51 | fl6->saddr = np->saddr; | |
52 | fl6->flowi6_oif = sk->sk_bound_dev_if; | |
53 | fl6->flowi6_mark = sk->sk_mark; | |
54 | fl6->fl6_dport = inet->inet_dport; | |
55 | fl6->fl6_sport = inet->inet_sport; | |
56 | fl6->flowlabel = np->flow_label; | |
e2d118a1 | 57 | fl6->flowi6_uid = sk->sk_uid; |
80fbdb20 MKL |
58 | |
59 | if (!fl6->flowi6_oif) | |
60 | fl6->flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; | |
61 | ||
62 | if (!fl6->flowi6_oif && ipv6_addr_is_multicast(&fl6->daddr)) | |
63 | fl6->flowi6_oif = np->mcast_oif; | |
64 | ||
65 | security_sk_classify_flow(sk, flowi6_to_flowi(fl6)); | |
66 | } | |
67 | ||
33c162a9 | 68 | int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr) |
7e2040db MKL |
69 | { |
70 | struct ip6_flowlabel *flowlabel = NULL; | |
71 | struct in6_addr *final_p, final; | |
72 | struct ipv6_txoptions *opt; | |
73 | struct dst_entry *dst; | |
74 | struct inet_sock *inet = inet_sk(sk); | |
75 | struct ipv6_pinfo *np = inet6_sk(sk); | |
76 | struct flowi6 fl6; | |
77 | int err = 0; | |
78 | ||
79 | if (np->sndflow && (np->flow_label & IPV6_FLOWLABEL_MASK)) { | |
80 | flowlabel = fl6_sock_lookup(sk, np->flow_label); | |
81 | if (!flowlabel) | |
82 | return -EINVAL; | |
83 | } | |
84 | ip6_datagram_flow_key_init(&fl6, sk); | |
85 | ||
86 | rcu_read_lock(); | |
87 | opt = flowlabel ? flowlabel->opt : rcu_dereference(np->opt); | |
88 | final_p = fl6_update_dst(&fl6, opt, &final); | |
89 | rcu_read_unlock(); | |
90 | ||
91 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p); | |
92 | if (IS_ERR(dst)) { | |
93 | err = PTR_ERR(dst); | |
94 | goto out; | |
95 | } | |
96 | ||
33c162a9 MKL |
97 | if (fix_sk_saddr) { |
98 | if (ipv6_addr_any(&np->saddr)) | |
99 | np->saddr = fl6.saddr; | |
7e2040db | 100 | |
33c162a9 MKL |
101 | if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { |
102 | sk->sk_v6_rcv_saddr = fl6.saddr; | |
103 | inet->inet_rcv_saddr = LOOPBACK4_IPV6; | |
104 | if (sk->sk_prot->rehash) | |
105 | sk->sk_prot->rehash(sk); | |
106 | } | |
7e2040db MKL |
107 | } |
108 | ||
109 | ip6_dst_store(sk, dst, | |
110 | ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? | |
111 | &sk->sk_v6_daddr : NULL, | |
112 | #ifdef CONFIG_IPV6_SUBTREES | |
113 | ipv6_addr_equal(&fl6.saddr, &np->saddr) ? | |
114 | &np->saddr : | |
115 | #endif | |
116 | NULL); | |
117 | ||
118 | out: | |
119 | fl6_sock_release(flowlabel); | |
120 | return err; | |
121 | } | |
122 | ||
e646b657 MKL |
123 | void ip6_datagram_release_cb(struct sock *sk) |
124 | { | |
125 | struct dst_entry *dst; | |
126 | ||
127 | if (ipv6_addr_v4mapped(&sk->sk_v6_daddr)) | |
128 | return; | |
129 | ||
130 | rcu_read_lock(); | |
131 | dst = __sk_dst_get(sk); | |
132 | if (!dst || !dst->obsolete || | |
133 | dst->ops->check(dst, inet6_sk(sk)->dst_cookie)) { | |
134 | rcu_read_unlock(); | |
135 | return; | |
136 | } | |
137 | rcu_read_unlock(); | |
138 | ||
139 | ip6_datagram_dst_update(sk, false); | |
140 | } | |
141 | EXPORT_SYMBOL_GPL(ip6_datagram_release_cb); | |
142 | ||
0382a25a GN |
143 | int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, |
144 | int addr_len) | |
1da177e4 LT |
145 | { |
146 | struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr; | |
67ba4152 IM |
147 | struct inet_sock *inet = inet_sk(sk); |
148 | struct ipv6_pinfo *np = inet6_sk(sk); | |
7e2040db | 149 | struct in6_addr *daddr; |
1da177e4 LT |
150 | int addr_type; |
151 | int err; | |
80fbdb20 | 152 | __be32 fl6_flowlabel = 0; |
1da177e4 LT |
153 | |
154 | if (usin->sin6_family == AF_INET) { | |
155 | if (__ipv6_only_sock(sk)) | |
156 | return -EAFNOSUPPORT; | |
03645a11 | 157 | err = __ip4_datagram_connect(sk, uaddr, addr_len); |
1da177e4 LT |
158 | goto ipv4_connected; |
159 | } | |
160 | ||
161 | if (addr_len < SIN6_LEN_RFC2133) | |
1ab1457c | 162 | return -EINVAL; |
1da177e4 | 163 | |
1ab1457c YH |
164 | if (usin->sin6_family != AF_INET6) |
165 | return -EAFNOSUPPORT; | |
1da177e4 | 166 | |
7e2040db | 167 | if (np->sndflow) |
80fbdb20 | 168 | fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK; |
1da177e4 | 169 | |
052d2369 | 170 | if (ipv6_addr_any(&usin->sin6_addr)) { |
1da177e4 LT |
171 | /* |
172 | * connect to self | |
173 | */ | |
052d2369 JL |
174 | if (ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)) |
175 | ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK), | |
176 | &usin->sin6_addr); | |
177 | else | |
178 | usin->sin6_addr = in6addr_loopback; | |
1da177e4 LT |
179 | } |
180 | ||
052d2369 JL |
181 | addr_type = ipv6_addr_type(&usin->sin6_addr); |
182 | ||
1da177e4 LT |
183 | daddr = &usin->sin6_addr; |
184 | ||
052d2369 | 185 | if (addr_type & IPV6_ADDR_MAPPED) { |
1da177e4 LT |
186 | struct sockaddr_in sin; |
187 | ||
188 | if (__ipv6_only_sock(sk)) { | |
189 | err = -ENETUNREACH; | |
190 | goto out; | |
191 | } | |
192 | sin.sin_family = AF_INET; | |
193 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
194 | sin.sin_port = usin->sin6_port; | |
195 | ||
03645a11 ED |
196 | err = __ip4_datagram_connect(sk, |
197 | (struct sockaddr *) &sin, | |
198 | sizeof(sin)); | |
1da177e4 LT |
199 | |
200 | ipv4_connected: | |
201 | if (err) | |
202 | goto out; | |
1ab1457c | 203 | |
efe4208f | 204 | ipv6_addr_set_v4mapped(inet->inet_daddr, &sk->sk_v6_daddr); |
1da177e4 | 205 | |
c15fea2d MM |
206 | if (ipv6_addr_any(&np->saddr) || |
207 | ipv6_mapped_addr_any(&np->saddr)) | |
c720c7e8 | 208 | ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr); |
b301e82c | 209 | |
efe4208f ED |
210 | if (ipv6_addr_any(&sk->sk_v6_rcv_saddr) || |
211 | ipv6_mapped_addr_any(&sk->sk_v6_rcv_saddr)) { | |
c720c7e8 | 212 | ipv6_addr_set_v4mapped(inet->inet_rcv_saddr, |
efe4208f | 213 | &sk->sk_v6_rcv_saddr); |
719f8358 ED |
214 | if (sk->sk_prot->rehash) |
215 | sk->sk_prot->rehash(sk); | |
216 | } | |
1da177e4 | 217 | |
1da177e4 LT |
218 | goto out; |
219 | } | |
220 | ||
842df073 | 221 | if (__ipv6_addr_needs_scope_id(addr_type)) { |
1da177e4 LT |
222 | if (addr_len >= sizeof(struct sockaddr_in6) && |
223 | usin->sin6_scope_id) { | |
224 | if (sk->sk_bound_dev_if && | |
225 | sk->sk_bound_dev_if != usin->sin6_scope_id) { | |
226 | err = -EINVAL; | |
227 | goto out; | |
228 | } | |
229 | sk->sk_bound_dev_if = usin->sin6_scope_id; | |
1da177e4 LT |
230 | } |
231 | ||
1ac4f008 BH |
232 | if (!sk->sk_bound_dev_if && (addr_type & IPV6_ADDR_MULTICAST)) |
233 | sk->sk_bound_dev_if = np->mcast_oif; | |
234 | ||
1da177e4 LT |
235 | /* Connect to link-local address requires an interface */ |
236 | if (!sk->sk_bound_dev_if) { | |
237 | err = -EINVAL; | |
238 | goto out; | |
239 | } | |
240 | } | |
241 | ||
efe4208f | 242 | sk->sk_v6_daddr = *daddr; |
80fbdb20 | 243 | np->flow_label = fl6_flowlabel; |
1da177e4 | 244 | |
c720c7e8 | 245 | inet->inet_dport = usin->sin6_port; |
1da177e4 LT |
246 | |
247 | /* | |
248 | * Check for a route to destination an obtain the | |
249 | * destination cache for it. | |
250 | */ | |
251 | ||
33c162a9 | 252 | err = ip6_datagram_dst_update(sk, true); |
85cb73ff WW |
253 | if (err) { |
254 | /* Reset daddr and dport so that udp_v6_early_demux() | |
255 | * fails to find this socket | |
256 | */ | |
257 | memset(&sk->sk_v6_daddr, 0, sizeof(sk->sk_v6_daddr)); | |
258 | inet->inet_dport = 0; | |
1da177e4 | 259 | goto out; |
85cb73ff | 260 | } |
1da177e4 LT |
261 | |
262 | sk->sk_state = TCP_ESTABLISHED; | |
877d1f62 | 263 | sk_set_txhash(sk); |
1da177e4 | 264 | out: |
1da177e4 LT |
265 | return err; |
266 | } | |
0382a25a | 267 | EXPORT_SYMBOL_GPL(__ip6_datagram_connect); |
03645a11 ED |
268 | |
269 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
270 | { | |
271 | int res; | |
272 | ||
273 | lock_sock(sk); | |
274 | res = __ip6_datagram_connect(sk, uaddr, addr_len); | |
275 | release_sock(sk); | |
276 | return res; | |
277 | } | |
a495f836 | 278 | EXPORT_SYMBOL_GPL(ip6_datagram_connect); |
1da177e4 | 279 | |
82b276cd HFS |
280 | int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *uaddr, |
281 | int addr_len) | |
282 | { | |
283 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, uaddr); | |
284 | if (sin6->sin6_family != AF_INET6) | |
285 | return -EAFNOSUPPORT; | |
286 | return ip6_datagram_connect(sk, uaddr, addr_len); | |
287 | } | |
288 | EXPORT_SYMBOL_GPL(ip6_datagram_connect_v6_only); | |
289 | ||
1ab1457c | 290 | void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, |
e69a4adc | 291 | __be16 port, u32 info, u8 *payload) |
1da177e4 LT |
292 | { |
293 | struct ipv6_pinfo *np = inet6_sk(sk); | |
cc70ab26 | 294 | struct icmp6hdr *icmph = icmp6_hdr(skb); |
1da177e4 LT |
295 | struct sock_exterr_skb *serr; |
296 | ||
297 | if (!np->recverr) | |
298 | return; | |
299 | ||
300 | skb = skb_clone(skb, GFP_ATOMIC); | |
301 | if (!skb) | |
302 | return; | |
303 | ||
d40a4de0 BH |
304 | skb->protocol = htons(ETH_P_IPV6); |
305 | ||
1da177e4 LT |
306 | serr = SKB_EXT_ERR(skb); |
307 | serr->ee.ee_errno = err; | |
308 | serr->ee.ee_origin = SO_EE_ORIGIN_ICMP6; | |
1ab1457c | 309 | serr->ee.ee_type = icmph->icmp6_type; |
1da177e4 LT |
310 | serr->ee.ee_code = icmph->icmp6_code; |
311 | serr->ee.ee_pad = 0; | |
312 | serr->ee.ee_info = info; | |
313 | serr->ee.ee_data = 0; | |
d56f90a7 ACM |
314 | serr->addr_offset = (u8 *)&(((struct ipv6hdr *)(icmph + 1))->daddr) - |
315 | skb_network_header(skb); | |
1da177e4 LT |
316 | serr->port = port; |
317 | ||
1da177e4 | 318 | __skb_pull(skb, payload - skb->data); |
bd82393c | 319 | skb_reset_transport_header(skb); |
1da177e4 LT |
320 | |
321 | if (sock_queue_err_skb(sk, skb)) | |
322 | kfree_skb(skb); | |
323 | } | |
324 | ||
4c9483b2 | 325 | void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info) |
1da177e4 | 326 | { |
1c1e9d2b | 327 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 LT |
328 | struct sock_exterr_skb *serr; |
329 | struct ipv6hdr *iph; | |
330 | struct sk_buff *skb; | |
331 | ||
332 | if (!np->recverr) | |
333 | return; | |
334 | ||
335 | skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); | |
336 | if (!skb) | |
337 | return; | |
338 | ||
d40a4de0 BH |
339 | skb->protocol = htons(ETH_P_IPV6); |
340 | ||
1ced98e8 ACM |
341 | skb_put(skb, sizeof(struct ipv6hdr)); |
342 | skb_reset_network_header(skb); | |
0660e03f | 343 | iph = ipv6_hdr(skb); |
4e3fd7a0 | 344 | iph->daddr = fl6->daddr; |
1da177e4 LT |
345 | |
346 | serr = SKB_EXT_ERR(skb); | |
347 | serr->ee.ee_errno = err; | |
348 | serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; | |
1ab1457c | 349 | serr->ee.ee_type = 0; |
1da177e4 LT |
350 | serr->ee.ee_code = 0; |
351 | serr->ee.ee_pad = 0; | |
352 | serr->ee.ee_info = info; | |
353 | serr->ee.ee_data = 0; | |
d56f90a7 | 354 | serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb); |
1958b856 | 355 | serr->port = fl6->fl6_dport; |
1da177e4 | 356 | |
27a884dc | 357 | __skb_pull(skb, skb_tail_pointer(skb) - skb->data); |
bd82393c | 358 | skb_reset_transport_header(skb); |
1da177e4 LT |
359 | |
360 | if (sock_queue_err_skb(sk, skb)) | |
361 | kfree_skb(skb); | |
362 | } | |
363 | ||
4c9483b2 | 364 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu) |
4b340ae2 BH |
365 | { |
366 | struct ipv6_pinfo *np = inet6_sk(sk); | |
367 | struct ipv6hdr *iph; | |
368 | struct sk_buff *skb; | |
369 | struct ip6_mtuinfo *mtu_info; | |
370 | ||
371 | if (!np->rxopt.bits.rxpmtu) | |
372 | return; | |
373 | ||
374 | skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); | |
375 | if (!skb) | |
376 | return; | |
377 | ||
378 | skb_put(skb, sizeof(struct ipv6hdr)); | |
379 | skb_reset_network_header(skb); | |
380 | iph = ipv6_hdr(skb); | |
4e3fd7a0 | 381 | iph->daddr = fl6->daddr; |
4b340ae2 BH |
382 | |
383 | mtu_info = IP6CBMTU(skb); | |
4b340ae2 BH |
384 | |
385 | mtu_info->ip6m_mtu = mtu; | |
386 | mtu_info->ip6m_addr.sin6_family = AF_INET6; | |
387 | mtu_info->ip6m_addr.sin6_port = 0; | |
388 | mtu_info->ip6m_addr.sin6_flowinfo = 0; | |
4c9483b2 | 389 | mtu_info->ip6m_addr.sin6_scope_id = fl6->flowi6_oif; |
4e3fd7a0 | 390 | mtu_info->ip6m_addr.sin6_addr = ipv6_hdr(skb)->daddr; |
4b340ae2 BH |
391 | |
392 | __skb_pull(skb, skb_tail_pointer(skb) - skb->data); | |
393 | skb_reset_transport_header(skb); | |
394 | ||
395 | skb = xchg(&np->rxpmtu, skb); | |
396 | kfree_skb(skb); | |
397 | } | |
398 | ||
34b99df4 JA |
399 | /* For some errors we have valid addr_offset even with zero payload and |
400 | * zero port. Also, addr_offset should be supported if port is set. | |
401 | */ | |
402 | static inline bool ipv6_datagram_support_addr(struct sock_exterr_skb *serr) | |
403 | { | |
404 | return serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6 || | |
405 | serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || | |
406 | serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL || serr->port; | |
407 | } | |
408 | ||
c247f053 WB |
409 | /* IPv6 supports cmsg on all origins aside from SO_EE_ORIGIN_LOCAL. |
410 | * | |
411 | * At one point, excluding local errors was a quick test to identify icmp/icmp6 | |
412 | * errors. This is no longer true, but the test remained, so the v6 stack, | |
413 | * unlike v4, also honors cmsg requests on all wifi and timestamp errors. | |
c247f053 WB |
414 | */ |
415 | static bool ip6_datagram_support_cmsg(struct sk_buff *skb, | |
416 | struct sock_exterr_skb *serr) | |
829ae9d6 | 417 | { |
c247f053 WB |
418 | if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || |
419 | serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6) | |
420 | return true; | |
421 | ||
422 | if (serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL) | |
423 | return false; | |
424 | ||
1862d620 | 425 | if (!IP6CB(skb)->iif) |
c247f053 | 426 | return false; |
829ae9d6 | 427 | |
c247f053 | 428 | return true; |
829ae9d6 WB |
429 | } |
430 | ||
1ab1457c | 431 | /* |
1da177e4 LT |
432 | * Handle MSG_ERRQUEUE |
433 | */ | |
85fbaa75 | 434 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) |
1da177e4 LT |
435 | { |
436 | struct ipv6_pinfo *np = inet6_sk(sk); | |
437 | struct sock_exterr_skb *serr; | |
364a9e93 | 438 | struct sk_buff *skb; |
342dfc30 | 439 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name); |
1da177e4 LT |
440 | struct { |
441 | struct sock_extended_err ee; | |
442 | struct sockaddr_in6 offender; | |
443 | } errhdr; | |
444 | int err; | |
445 | int copied; | |
446 | ||
447 | err = -EAGAIN; | |
364a9e93 | 448 | skb = sock_dequeue_err_skb(sk); |
63159f29 | 449 | if (!skb) |
1da177e4 LT |
450 | goto out; |
451 | ||
452 | copied = skb->len; | |
453 | if (copied > len) { | |
454 | msg->msg_flags |= MSG_TRUNC; | |
455 | copied = len; | |
456 | } | |
51f3d02b | 457 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
960a2628 ED |
458 | if (unlikely(err)) { |
459 | kfree_skb(skb); | |
460 | return err; | |
461 | } | |
1da177e4 LT |
462 | sock_recv_timestamp(msg, sk, skb); |
463 | ||
464 | serr = SKB_EXT_ERR(skb); | |
465 | ||
34b99df4 | 466 | if (sin && ipv6_datagram_support_addr(serr)) { |
d56f90a7 | 467 | const unsigned char *nh = skb_network_header(skb); |
1da177e4 LT |
468 | sin->sin6_family = AF_INET6; |
469 | sin->sin6_flowinfo = 0; | |
1ab1457c | 470 | sin->sin6_port = serr->port; |
d40a4de0 | 471 | if (skb->protocol == htons(ETH_P_IPV6)) { |
6c40d100 YH |
472 | const struct ipv6hdr *ip6h = container_of((struct in6_addr *)(nh + serr->addr_offset), |
473 | struct ipv6hdr, daddr); | |
474 | sin->sin6_addr = ip6h->daddr; | |
1da177e4 | 475 | if (np->sndflow) |
6502ca52 | 476 | sin->sin6_flowinfo = ip6_flowinfo(ip6h); |
842df073 HFS |
477 | sin->sin6_scope_id = |
478 | ipv6_iface_scope_id(&sin->sin6_addr, | |
479 | IP6CB(skb)->iif); | |
1da177e4 | 480 | } else { |
b301e82c BH |
481 | ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset), |
482 | &sin->sin6_addr); | |
842df073 | 483 | sin->sin6_scope_id = 0; |
1da177e4 | 484 | } |
85fbaa75 | 485 | *addr_len = sizeof(*sin); |
1da177e4 LT |
486 | } |
487 | ||
488 | memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); | |
489 | sin = &errhdr.offender; | |
f812116b | 490 | memset(sin, 0, sizeof(*sin)); |
c247f053 WB |
491 | |
492 | if (ip6_datagram_support_cmsg(skb, serr)) { | |
1da177e4 | 493 | sin->sin6_family = AF_INET6; |
c247f053 | 494 | if (np->rxopt.all) |
4b261c75 | 495 | ip6_datagram_recv_common_ctl(sk, msg, skb); |
d40a4de0 | 496 | if (skb->protocol == htons(ETH_P_IPV6)) { |
4e3fd7a0 | 497 | sin->sin6_addr = ipv6_hdr(skb)->saddr; |
1da177e4 | 498 | if (np->rxopt.all) |
4b261c75 | 499 | ip6_datagram_recv_specific_ctl(sk, msg, skb); |
842df073 HFS |
500 | sin->sin6_scope_id = |
501 | ipv6_iface_scope_id(&sin->sin6_addr, | |
502 | IP6CB(skb)->iif); | |
1da177e4 | 503 | } else { |
b301e82c BH |
504 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
505 | &sin->sin6_addr); | |
f812116b | 506 | if (inet_sk(sk)->cmsg_flags) |
1da177e4 LT |
507 | ip_cmsg_recv(msg, skb); |
508 | } | |
509 | } | |
510 | ||
511 | put_cmsg(msg, SOL_IPV6, IPV6_RECVERR, sizeof(errhdr), &errhdr); | |
512 | ||
513 | /* Now we could try to dump offended packet options */ | |
514 | ||
515 | msg->msg_flags |= MSG_ERRQUEUE; | |
516 | err = copied; | |
517 | ||
960a2628 | 518 | consume_skb(skb); |
1da177e4 LT |
519 | out: |
520 | return err; | |
521 | } | |
a495f836 | 522 | EXPORT_SYMBOL_GPL(ipv6_recv_error); |
1da177e4 | 523 | |
4b340ae2 BH |
524 | /* |
525 | * Handle IPV6_RECVPATHMTU | |
526 | */ | |
85fbaa75 HFS |
527 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, |
528 | int *addr_len) | |
4b340ae2 BH |
529 | { |
530 | struct ipv6_pinfo *np = inet6_sk(sk); | |
531 | struct sk_buff *skb; | |
4b340ae2 | 532 | struct ip6_mtuinfo mtu_info; |
342dfc30 | 533 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name); |
4b340ae2 BH |
534 | int err; |
535 | int copied; | |
536 | ||
537 | err = -EAGAIN; | |
538 | skb = xchg(&np->rxpmtu, NULL); | |
63159f29 | 539 | if (!skb) |
4b340ae2 BH |
540 | goto out; |
541 | ||
542 | copied = skb->len; | |
543 | if (copied > len) { | |
544 | msg->msg_flags |= MSG_TRUNC; | |
545 | copied = len; | |
546 | } | |
51f3d02b | 547 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
4b340ae2 BH |
548 | if (err) |
549 | goto out_free_skb; | |
550 | ||
551 | sock_recv_timestamp(msg, sk, skb); | |
552 | ||
553 | memcpy(&mtu_info, IP6CBMTU(skb), sizeof(mtu_info)); | |
554 | ||
4b340ae2 BH |
555 | if (sin) { |
556 | sin->sin6_family = AF_INET6; | |
557 | sin->sin6_flowinfo = 0; | |
558 | sin->sin6_port = 0; | |
559 | sin->sin6_scope_id = mtu_info.ip6m_addr.sin6_scope_id; | |
4e3fd7a0 | 560 | sin->sin6_addr = mtu_info.ip6m_addr.sin6_addr; |
85fbaa75 | 561 | *addr_len = sizeof(*sin); |
4b340ae2 BH |
562 | } |
563 | ||
564 | put_cmsg(msg, SOL_IPV6, IPV6_PATHMTU, sizeof(mtu_info), &mtu_info); | |
565 | ||
566 | err = copied; | |
567 | ||
568 | out_free_skb: | |
569 | kfree_skb(skb); | |
570 | out: | |
571 | return err; | |
572 | } | |
1da177e4 LT |
573 | |
574 | ||
4b261c75 HFS |
575 | void ip6_datagram_recv_common_ctl(struct sock *sk, struct msghdr *msg, |
576 | struct sk_buff *skb) | |
1da177e4 LT |
577 | { |
578 | struct ipv6_pinfo *np = inet6_sk(sk); | |
4b261c75 | 579 | bool is_ipv6 = skb->protocol == htons(ETH_P_IPV6); |
1da177e4 LT |
580 | |
581 | if (np->rxopt.bits.rxinfo) { | |
582 | struct in6_pktinfo src_info; | |
583 | ||
4b261c75 HFS |
584 | if (is_ipv6) { |
585 | src_info.ipi6_ifindex = IP6CB(skb)->iif; | |
586 | src_info.ipi6_addr = ipv6_hdr(skb)->daddr; | |
587 | } else { | |
588 | src_info.ipi6_ifindex = | |
589 | PKTINFO_SKB_CB(skb)->ipi_ifindex; | |
590 | ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr, | |
591 | &src_info.ipi6_addr); | |
592 | } | |
829ae9d6 WB |
593 | |
594 | if (src_info.ipi6_ifindex >= 0) | |
595 | put_cmsg(msg, SOL_IPV6, IPV6_PKTINFO, | |
596 | sizeof(src_info), &src_info); | |
1da177e4 | 597 | } |
4b261c75 HFS |
598 | } |
599 | ||
600 | void ip6_datagram_recv_specific_ctl(struct sock *sk, struct msghdr *msg, | |
601 | struct sk_buff *skb) | |
602 | { | |
603 | struct ipv6_pinfo *np = inet6_sk(sk); | |
604 | struct inet6_skb_parm *opt = IP6CB(skb); | |
605 | unsigned char *nh = skb_network_header(skb); | |
1da177e4 LT |
606 | |
607 | if (np->rxopt.bits.rxhlim) { | |
0660e03f | 608 | int hlim = ipv6_hdr(skb)->hop_limit; |
1da177e4 LT |
609 | put_cmsg(msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); |
610 | } | |
611 | ||
41a1f8ea | 612 | if (np->rxopt.bits.rxtclass) { |
e7219858 | 613 | int tclass = ipv6_get_dsfield(ipv6_hdr(skb)); |
41a1f8ea YH |
614 | put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
615 | } | |
616 | ||
6502ca52 YH |
617 | if (np->rxopt.bits.rxflow) { |
618 | __be32 flowinfo = ip6_flowinfo((struct ipv6hdr *)nh); | |
619 | if (flowinfo) | |
620 | put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); | |
1da177e4 | 621 | } |
333fad53 YH |
622 | |
623 | /* HbH is allowed only once */ | |
8b58a398 FW |
624 | if (np->rxopt.bits.hopopts && (opt->flags & IP6SKB_HOPBYHOP)) { |
625 | u8 *ptr = nh + sizeof(struct ipv6hdr); | |
1da177e4 LT |
626 | put_cmsg(msg, SOL_IPV6, IPV6_HOPOPTS, (ptr[1]+1)<<3, ptr); |
627 | } | |
333fad53 YH |
628 | |
629 | if (opt->lastopt && | |
630 | (np->rxopt.bits.dstopts || np->rxopt.bits.srcrt)) { | |
631 | /* | |
632 | * Silly enough, but we need to reparse in order to | |
633 | * report extension headers (except for HbH) | |
634 | * in order. | |
635 | * | |
1ab1457c | 636 | * Also note that IPV6_RECVRTHDRDSTOPTS is NOT |
333fad53 YH |
637 | * (and WILL NOT be) defined because |
638 | * IPV6_RECVDSTOPTS is more generic. --yoshfuji | |
639 | */ | |
640 | unsigned int off = sizeof(struct ipv6hdr); | |
0660e03f | 641 | u8 nexthdr = ipv6_hdr(skb)->nexthdr; |
333fad53 YH |
642 | |
643 | while (off <= opt->lastopt) { | |
95c96174 | 644 | unsigned int len; |
d56f90a7 | 645 | u8 *ptr = nh + off; |
333fad53 | 646 | |
b5a4257c | 647 | switch (nexthdr) { |
333fad53 YH |
648 | case IPPROTO_DSTOPTS: |
649 | nexthdr = ptr[0]; | |
650 | len = (ptr[1] + 1) << 3; | |
651 | if (np->rxopt.bits.dstopts) | |
652 | put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, len, ptr); | |
653 | break; | |
654 | case IPPROTO_ROUTING: | |
655 | nexthdr = ptr[0]; | |
656 | len = (ptr[1] + 1) << 3; | |
657 | if (np->rxopt.bits.srcrt) | |
658 | put_cmsg(msg, SOL_IPV6, IPV6_RTHDR, len, ptr); | |
659 | break; | |
660 | case IPPROTO_AH: | |
661 | nexthdr = ptr[0]; | |
a3059893 | 662 | len = (ptr[1] + 2) << 2; |
333fad53 YH |
663 | break; |
664 | default: | |
665 | nexthdr = ptr[0]; | |
666 | len = (ptr[1] + 1) << 3; | |
667 | break; | |
668 | } | |
669 | ||
670 | off += len; | |
671 | } | |
672 | } | |
673 | ||
674 | /* socket options in old style */ | |
675 | if (np->rxopt.bits.rxoinfo) { | |
676 | struct in6_pktinfo src_info; | |
677 | ||
678 | src_info.ipi6_ifindex = opt->iif; | |
4e3fd7a0 | 679 | src_info.ipi6_addr = ipv6_hdr(skb)->daddr; |
333fad53 YH |
680 | put_cmsg(msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
681 | } | |
682 | if (np->rxopt.bits.rxohlim) { | |
0660e03f | 683 | int hlim = ipv6_hdr(skb)->hop_limit; |
333fad53 YH |
684 | put_cmsg(msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); |
685 | } | |
8b58a398 FW |
686 | if (np->rxopt.bits.ohopopts && (opt->flags & IP6SKB_HOPBYHOP)) { |
687 | u8 *ptr = nh + sizeof(struct ipv6hdr); | |
333fad53 YH |
688 | put_cmsg(msg, SOL_IPV6, IPV6_2292HOPOPTS, (ptr[1]+1)<<3, ptr); |
689 | } | |
690 | if (np->rxopt.bits.odstopts && opt->dst0) { | |
d56f90a7 | 691 | u8 *ptr = nh + opt->dst0; |
333fad53 | 692 | put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); |
1da177e4 | 693 | } |
333fad53 | 694 | if (np->rxopt.bits.osrcrt && opt->srcrt) { |
d56f90a7 | 695 | struct ipv6_rt_hdr *rthdr = (struct ipv6_rt_hdr *)(nh + opt->srcrt); |
333fad53 | 696 | put_cmsg(msg, SOL_IPV6, IPV6_2292RTHDR, (rthdr->hdrlen+1) << 3, rthdr); |
1da177e4 | 697 | } |
333fad53 | 698 | if (np->rxopt.bits.odstopts && opt->dst1) { |
d56f90a7 | 699 | u8 *ptr = nh + opt->dst1; |
333fad53 | 700 | put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); |
1da177e4 | 701 | } |
6c468622 BS |
702 | if (np->rxopt.bits.rxorigdstaddr) { |
703 | struct sockaddr_in6 sin6; | |
747465ef | 704 | __be16 *ports = (__be16 *) skb_transport_header(skb); |
6c468622 | 705 | |
39b2dd76 | 706 | if (skb_transport_offset(skb) + 4 <= (int)skb->len) { |
6c468622 BS |
707 | /* All current transport protocols have the port numbers in the |
708 | * first four bytes of the transport header and this function is | |
709 | * written with this assumption in mind. | |
710 | */ | |
711 | ||
712 | sin6.sin6_family = AF_INET6; | |
4e3fd7a0 | 713 | sin6.sin6_addr = ipv6_hdr(skb)->daddr; |
6c468622 BS |
714 | sin6.sin6_port = ports[1]; |
715 | sin6.sin6_flowinfo = 0; | |
3868b7aa HFS |
716 | sin6.sin6_scope_id = |
717 | ipv6_iface_scope_id(&ipv6_hdr(skb)->daddr, | |
718 | opt->iif); | |
6c468622 BS |
719 | |
720 | put_cmsg(msg, SOL_IPV6, IPV6_ORIGDSTADDR, sizeof(sin6), &sin6); | |
721 | } | |
722 | } | |
0cc0aa61 WB |
723 | if (np->rxopt.bits.recvfragsize && opt->frag_max_size) { |
724 | int val = opt->frag_max_size; | |
725 | ||
726 | put_cmsg(msg, SOL_IPV6, IPV6_RECVFRAGSIZE, sizeof(val), &val); | |
727 | } | |
4b261c75 HFS |
728 | } |
729 | ||
730 | void ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg, | |
731 | struct sk_buff *skb) | |
732 | { | |
733 | ip6_datagram_recv_common_ctl(sk, msg, skb); | |
734 | ip6_datagram_recv_specific_ctl(sk, msg, skb); | |
1da177e4 | 735 | } |
8e72d37e | 736 | EXPORT_SYMBOL_GPL(ip6_datagram_recv_ctl); |
1da177e4 | 737 | |
73df66f8 TP |
738 | int ip6_datagram_send_ctl(struct net *net, struct sock *sk, |
739 | struct msghdr *msg, struct flowi6 *fl6, | |
26879da5 | 740 | struct ipcm6_cookie *ipc6, struct sockcm_cookie *sockc) |
1da177e4 LT |
741 | { |
742 | struct in6_pktinfo *src_info; | |
743 | struct cmsghdr *cmsg; | |
744 | struct ipv6_rt_hdr *rthdr; | |
745 | struct ipv6_opt_hdr *hdr; | |
26879da5 | 746 | struct ipv6_txoptions *opt = ipc6->opt; |
1da177e4 LT |
747 | int len; |
748 | int err = 0; | |
749 | ||
f95b414e | 750 | for_each_cmsghdr(cmsg, msg) { |
1da177e4 | 751 | int addr_type; |
1da177e4 LT |
752 | |
753 | if (!CMSG_OK(msg, cmsg)) { | |
754 | err = -EINVAL; | |
755 | goto exit_f; | |
756 | } | |
757 | ||
ad1e46a8 | 758 | if (cmsg->cmsg_level == SOL_SOCKET) { |
2632616b ED |
759 | err = __sock_cmsg_send(sk, msg, cmsg, sockc); |
760 | if (err) | |
761 | return err; | |
ad1e46a8 SHY |
762 | continue; |
763 | } | |
764 | ||
1da177e4 LT |
765 | if (cmsg->cmsg_level != SOL_IPV6) |
766 | continue; | |
767 | ||
768 | switch (cmsg->cmsg_type) { | |
1ab1457c YH |
769 | case IPV6_PKTINFO: |
770 | case IPV6_2292PKTINFO: | |
187e3838 YH |
771 | { |
772 | struct net_device *dev = NULL; | |
773 | ||
1ab1457c | 774 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct in6_pktinfo))) { |
1da177e4 LT |
775 | err = -EINVAL; |
776 | goto exit_f; | |
777 | } | |
778 | ||
779 | src_info = (struct in6_pktinfo *)CMSG_DATA(cmsg); | |
1ab1457c | 780 | |
1da177e4 | 781 | if (src_info->ipi6_ifindex) { |
4c9483b2 DM |
782 | if (fl6->flowi6_oif && |
783 | src_info->ipi6_ifindex != fl6->flowi6_oif) | |
1da177e4 | 784 | return -EINVAL; |
4c9483b2 | 785 | fl6->flowi6_oif = src_info->ipi6_ifindex; |
1da177e4 LT |
786 | } |
787 | ||
187e3838 | 788 | addr_type = __ipv6_addr_type(&src_info->ipi6_addr); |
1da177e4 | 789 | |
536b2e92 | 790 | rcu_read_lock(); |
4c9483b2 DM |
791 | if (fl6->flowi6_oif) { |
792 | dev = dev_get_by_index_rcu(net, fl6->flowi6_oif); | |
536b2e92 ED |
793 | if (!dev) { |
794 | rcu_read_unlock(); | |
187e3838 | 795 | return -ENODEV; |
536b2e92 ED |
796 | } |
797 | } else if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
798 | rcu_read_unlock(); | |
187e3838 | 799 | return -EINVAL; |
536b2e92 | 800 | } |
1ab1457c | 801 | |
187e3838 YH |
802 | if (addr_type != IPV6_ADDR_ANY) { |
803 | int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL; | |
2563fa59 | 804 | if (!(inet_sk(sk)->freebind || inet_sk(sk)->transparent) && |
ec0506db | 805 | !ipv6_chk_addr(net, &src_info->ipi6_addr, |
7c90cc2d FLB |
806 | strict ? dev : NULL, 0) && |
807 | !ipv6_chk_acast_addr_src(net, dev, | |
808 | &src_info->ipi6_addr)) | |
187e3838 YH |
809 | err = -EINVAL; |
810 | else | |
4e3fd7a0 | 811 | fl6->saddr = src_info->ipi6_addr; |
1da177e4 | 812 | } |
187e3838 | 813 | |
536b2e92 | 814 | rcu_read_unlock(); |
1da177e4 | 815 | |
187e3838 YH |
816 | if (err) |
817 | goto exit_f; | |
818 | ||
1da177e4 | 819 | break; |
187e3838 | 820 | } |
1da177e4 LT |
821 | |
822 | case IPV6_FLOWINFO: | |
1ab1457c | 823 | if (cmsg->cmsg_len < CMSG_LEN(4)) { |
1da177e4 LT |
824 | err = -EINVAL; |
825 | goto exit_f; | |
826 | } | |
827 | ||
4c9483b2 DM |
828 | if (fl6->flowlabel&IPV6_FLOWINFO_MASK) { |
829 | if ((fl6->flowlabel^*(__be32 *)CMSG_DATA(cmsg))&~IPV6_FLOWINFO_MASK) { | |
1da177e4 LT |
830 | err = -EINVAL; |
831 | goto exit_f; | |
832 | } | |
833 | } | |
4c9483b2 | 834 | fl6->flowlabel = IPV6_FLOWINFO_MASK & *(__be32 *)CMSG_DATA(cmsg); |
1da177e4 LT |
835 | break; |
836 | ||
333fad53 | 837 | case IPV6_2292HOPOPTS: |
1da177e4 | 838 | case IPV6_HOPOPTS: |
1ab1457c | 839 | if (opt->hopopt || cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { |
1da177e4 LT |
840 | err = -EINVAL; |
841 | goto exit_f; | |
842 | } | |
843 | ||
844 | hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); | |
845 | len = ((hdr->hdrlen + 1) << 3); | |
846 | if (cmsg->cmsg_len < CMSG_LEN(len)) { | |
847 | err = -EINVAL; | |
848 | goto exit_f; | |
849 | } | |
af31f412 | 850 | if (!ns_capable(net->user_ns, CAP_NET_RAW)) { |
1da177e4 LT |
851 | err = -EPERM; |
852 | goto exit_f; | |
853 | } | |
854 | opt->opt_nflen += len; | |
855 | opt->hopopt = hdr; | |
856 | break; | |
857 | ||
333fad53 | 858 | case IPV6_2292DSTOPTS: |
1ab1457c | 859 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { |
1da177e4 LT |
860 | err = -EINVAL; |
861 | goto exit_f; | |
862 | } | |
863 | ||
864 | hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); | |
865 | len = ((hdr->hdrlen + 1) << 3); | |
866 | if (cmsg->cmsg_len < CMSG_LEN(len)) { | |
867 | err = -EINVAL; | |
868 | goto exit_f; | |
869 | } | |
af31f412 | 870 | if (!ns_capable(net->user_ns, CAP_NET_RAW)) { |
1da177e4 LT |
871 | err = -EPERM; |
872 | goto exit_f; | |
873 | } | |
874 | if (opt->dst1opt) { | |
875 | err = -EINVAL; | |
876 | goto exit_f; | |
877 | } | |
878 | opt->opt_flen += len; | |
879 | opt->dst1opt = hdr; | |
880 | break; | |
881 | ||
333fad53 YH |
882 | case IPV6_DSTOPTS: |
883 | case IPV6_RTHDRDSTOPTS: | |
884 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { | |
885 | err = -EINVAL; | |
886 | goto exit_f; | |
887 | } | |
888 | ||
889 | hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); | |
890 | len = ((hdr->hdrlen + 1) << 3); | |
891 | if (cmsg->cmsg_len < CMSG_LEN(len)) { | |
892 | err = -EINVAL; | |
893 | goto exit_f; | |
894 | } | |
af31f412 | 895 | if (!ns_capable(net->user_ns, CAP_NET_RAW)) { |
333fad53 YH |
896 | err = -EPERM; |
897 | goto exit_f; | |
898 | } | |
899 | if (cmsg->cmsg_type == IPV6_DSTOPTS) { | |
900 | opt->opt_flen += len; | |
901 | opt->dst1opt = hdr; | |
902 | } else { | |
903 | opt->opt_nflen += len; | |
904 | opt->dst0opt = hdr; | |
905 | } | |
906 | break; | |
907 | ||
908 | case IPV6_2292RTHDR: | |
1da177e4 | 909 | case IPV6_RTHDR: |
1ab1457c | 910 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_rt_hdr))) { |
1da177e4 LT |
911 | err = -EINVAL; |
912 | goto exit_f; | |
913 | } | |
914 | ||
915 | rthdr = (struct ipv6_rt_hdr *)CMSG_DATA(cmsg); | |
916 | ||
280a9d34 | 917 | switch (rthdr->type) { |
07a93626 | 918 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
280a9d34 | 919 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
920 | if (rthdr->hdrlen != 2 || |
921 | rthdr->segments_left != 1) { | |
922 | err = -EINVAL; | |
923 | goto exit_f; | |
924 | } | |
280a9d34 | 925 | break; |
bb4dbf9e | 926 | #endif |
280a9d34 | 927 | default: |
1da177e4 LT |
928 | err = -EINVAL; |
929 | goto exit_f; | |
930 | } | |
931 | ||
932 | len = ((rthdr->hdrlen + 1) << 3); | |
933 | ||
1ab1457c | 934 | if (cmsg->cmsg_len < CMSG_LEN(len)) { |
1da177e4 LT |
935 | err = -EINVAL; |
936 | goto exit_f; | |
937 | } | |
938 | ||
939 | /* segments left must also match */ | |
940 | if ((rthdr->hdrlen >> 1) != rthdr->segments_left) { | |
941 | err = -EINVAL; | |
942 | goto exit_f; | |
943 | } | |
944 | ||
945 | opt->opt_nflen += len; | |
946 | opt->srcrt = rthdr; | |
947 | ||
333fad53 | 948 | if (cmsg->cmsg_type == IPV6_2292RTHDR && opt->dst1opt) { |
1da177e4 LT |
949 | int dsthdrlen = ((opt->dst1opt->hdrlen+1)<<3); |
950 | ||
951 | opt->opt_nflen += dsthdrlen; | |
952 | opt->dst0opt = opt->dst1opt; | |
953 | opt->dst1opt = NULL; | |
954 | opt->opt_flen -= dsthdrlen; | |
955 | } | |
956 | ||
957 | break; | |
958 | ||
333fad53 | 959 | case IPV6_2292HOPLIMIT: |
1da177e4 LT |
960 | case IPV6_HOPLIMIT: |
961 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) { | |
962 | err = -EINVAL; | |
963 | goto exit_f; | |
964 | } | |
965 | ||
26879da5 WW |
966 | ipc6->hlimit = *(int *)CMSG_DATA(cmsg); |
967 | if (ipc6->hlimit < -1 || ipc6->hlimit > 0xff) { | |
e8766fc8 SW |
968 | err = -EINVAL; |
969 | goto exit_f; | |
970 | } | |
971 | ||
1da177e4 LT |
972 | break; |
973 | ||
41a1f8ea YH |
974 | case IPV6_TCLASS: |
975 | { | |
976 | int tc; | |
977 | ||
978 | err = -EINVAL; | |
b5a4257c | 979 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) |
41a1f8ea | 980 | goto exit_f; |
41a1f8ea YH |
981 | |
982 | tc = *(int *)CMSG_DATA(cmsg); | |
d0ee011f | 983 | if (tc < -1 || tc > 0xff) |
41a1f8ea YH |
984 | goto exit_f; |
985 | ||
986 | err = 0; | |
26879da5 | 987 | ipc6->tclass = tc; |
41a1f8ea | 988 | |
13b52cd4 BH |
989 | break; |
990 | } | |
991 | ||
992 | case IPV6_DONTFRAG: | |
993 | { | |
994 | int df; | |
995 | ||
996 | err = -EINVAL; | |
b5a4257c | 997 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) |
13b52cd4 | 998 | goto exit_f; |
13b52cd4 BH |
999 | |
1000 | df = *(int *)CMSG_DATA(cmsg); | |
1001 | if (df < 0 || df > 1) | |
1002 | goto exit_f; | |
1003 | ||
1004 | err = 0; | |
26879da5 | 1005 | ipc6->dontfrag = df; |
13b52cd4 | 1006 | |
41a1f8ea YH |
1007 | break; |
1008 | } | |
1da177e4 | 1009 | default: |
ba7a46f1 JP |
1010 | net_dbg_ratelimited("invalid cmsg type: %d\n", |
1011 | cmsg->cmsg_type); | |
1da177e4 | 1012 | err = -EINVAL; |
4a36702e | 1013 | goto exit_f; |
3ff50b79 | 1014 | } |
1da177e4 LT |
1015 | } |
1016 | ||
1017 | exit_f: | |
1018 | return err; | |
1019 | } | |
73df66f8 | 1020 | EXPORT_SYMBOL_GPL(ip6_datagram_send_ctl); |
17ef66af LC |
1021 | |
1022 | void ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp, | |
1023 | __u16 srcp, __u16 destp, int bucket) | |
1024 | { | |
17ef66af LC |
1025 | const struct in6_addr *dest, *src; |
1026 | ||
efe4208f ED |
1027 | dest = &sp->sk_v6_daddr; |
1028 | src = &sp->sk_v6_rcv_saddr; | |
17ef66af LC |
1029 | seq_printf(seq, |
1030 | "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
d14c5ab6 | 1031 | "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n", |
17ef66af LC |
1032 | bucket, |
1033 | src->s6_addr32[0], src->s6_addr32[1], | |
1034 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1035 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1036 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1037 | sp->sk_state, | |
1038 | sk_wmem_alloc_get(sp), | |
1039 | sk_rmem_alloc_get(sp), | |
1040 | 0, 0L, 0, | |
1041 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), | |
1042 | 0, | |
1043 | sock_i_ino(sp), | |
41c6d650 | 1044 | refcount_read(&sp->sk_refcnt), sp, |
17ef66af LC |
1045 | atomic_read(&sp->sk_drops)); |
1046 | } |