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1da177e4 LT |
1 | /* |
2 | * IPv6 BSD socket options interface | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
7 | * | |
8 | * Based on linux/net/ipv4/ip_sockglue.c | |
9 | * | |
10 | * $Id: ipv6_sockglue.c,v 1.41 2002/02/01 22:01:04 davem Exp $ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | * | |
17 | * FIXME: Make the setsockopt code POSIX compliant: That is | |
18 | * | |
19 | * o Return -EINVAL for setsockopt of short lengths | |
20 | * o Truncate getsockopt returns | |
21 | * o Return an optlen of the truncated length if need be | |
22 | * | |
23 | * Changes: | |
24 | * David L Stevens <dlstevens@us.ibm.com>: | |
25 | * - added multicast source filtering API for MLDv2 | |
26 | */ | |
27 | ||
28 | #include <linux/module.h> | |
4fc268d2 | 29 | #include <linux/capability.h> |
1da177e4 LT |
30 | #include <linux/errno.h> |
31 | #include <linux/types.h> | |
32 | #include <linux/socket.h> | |
33 | #include <linux/sockios.h> | |
34 | #include <linux/sched.h> | |
35 | #include <linux/net.h> | |
36 | #include <linux/in6.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/if_arp.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/sysctl.h> | |
41 | #include <linux/netfilter.h> | |
42 | ||
43 | #include <net/sock.h> | |
44 | #include <net/snmp.h> | |
45 | #include <net/ipv6.h> | |
46 | #include <net/ndisc.h> | |
47 | #include <net/protocol.h> | |
48 | #include <net/transp_v6.h> | |
49 | #include <net/ip6_route.h> | |
50 | #include <net/addrconf.h> | |
51 | #include <net/inet_common.h> | |
52 | #include <net/tcp.h> | |
53 | #include <net/udp.h> | |
ba4e58ec | 54 | #include <net/udplite.h> |
1da177e4 LT |
55 | #include <net/xfrm.h> |
56 | ||
57 | #include <asm/uaccess.h> | |
58 | ||
ba89966c | 59 | DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; |
1da177e4 | 60 | |
a430a43d HX |
61 | static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb, |
62 | int proto) | |
adcfc7d0 | 63 | { |
a430a43d | 64 | struct inet6_protocol *ops = NULL; |
bbcf467d | 65 | |
adcfc7d0 HX |
66 | for (;;) { |
67 | struct ipv6_opt_hdr *opth; | |
68 | int len; | |
69 | ||
70 | if (proto != NEXTHDR_HOP) { | |
71 | ops = rcu_dereference(inet6_protos[proto]); | |
72 | ||
73 | if (unlikely(!ops)) | |
a430a43d | 74 | break; |
adcfc7d0 HX |
75 | |
76 | if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) | |
77 | break; | |
78 | } | |
79 | ||
80 | if (unlikely(!pskb_may_pull(skb, 8))) | |
a430a43d | 81 | break; |
adcfc7d0 HX |
82 | |
83 | opth = (void *)skb->data; | |
84 | len = opth->hdrlen * 8 + 8; | |
85 | ||
86 | if (unlikely(!pskb_may_pull(skb, len))) | |
a430a43d | 87 | break; |
adcfc7d0 HX |
88 | |
89 | proto = opth->nexthdr; | |
90 | __skb_pull(skb, len); | |
91 | } | |
92 | ||
a430a43d HX |
93 | return ops; |
94 | } | |
95 | ||
96 | static int ipv6_gso_send_check(struct sk_buff *skb) | |
97 | { | |
98 | struct ipv6hdr *ipv6h; | |
99 | struct inet6_protocol *ops; | |
100 | int err = -EINVAL; | |
101 | ||
102 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
103 | goto out; | |
104 | ||
105 | ipv6h = skb->nh.ipv6h; | |
106 | __skb_pull(skb, sizeof(*ipv6h)); | |
107 | err = -EPROTONOSUPPORT; | |
108 | ||
109 | rcu_read_lock(); | |
110 | ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); | |
111 | if (likely(ops && ops->gso_send_check)) { | |
112 | skb->h.raw = skb->data; | |
113 | err = ops->gso_send_check(skb); | |
114 | } | |
115 | rcu_read_unlock(); | |
116 | ||
117 | out: | |
118 | return err; | |
119 | } | |
adcfc7d0 | 120 | |
a430a43d HX |
121 | static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features) |
122 | { | |
123 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
124 | struct ipv6hdr *ipv6h; | |
125 | struct inet6_protocol *ops; | |
126 | ||
1a9e9ef6 HX |
127 | if (!(features & NETIF_F_HW_CSUM)) |
128 | features &= ~NETIF_F_SG; | |
129 | ||
a430a43d HX |
130 | if (unlikely(skb_shinfo(skb)->gso_type & |
131 | ~(SKB_GSO_UDP | | |
132 | SKB_GSO_DODGY | | |
133 | SKB_GSO_TCP_ECN | | |
134 | SKB_GSO_TCPV6 | | |
135 | 0))) | |
136 | goto out; | |
137 | ||
138 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) | |
139 | goto out; | |
140 | ||
141 | ipv6h = skb->nh.ipv6h; | |
142 | __skb_pull(skb, sizeof(*ipv6h)); | |
143 | segs = ERR_PTR(-EPROTONOSUPPORT); | |
144 | ||
145 | rcu_read_lock(); | |
146 | ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); | |
147 | if (likely(ops && ops->gso_segment)) { | |
148 | skb->h.raw = skb->data; | |
149 | segs = ops->gso_segment(skb, features); | |
150 | } | |
adcfc7d0 HX |
151 | rcu_read_unlock(); |
152 | ||
153 | if (unlikely(IS_ERR(segs))) | |
154 | goto out; | |
155 | ||
156 | for (skb = segs; skb; skb = skb->next) { | |
157 | ipv6h = skb->nh.ipv6h; | |
6703931c MC |
158 | ipv6h->payload_len = htons(skb->len - skb->mac_len - |
159 | sizeof(*ipv6h)); | |
adcfc7d0 HX |
160 | } |
161 | ||
162 | out: | |
163 | return segs; | |
164 | } | |
165 | ||
1da177e4 LT |
166 | static struct packet_type ipv6_packet_type = { |
167 | .type = __constant_htons(ETH_P_IPV6), | |
168 | .func = ipv6_rcv, | |
a430a43d | 169 | .gso_send_check = ipv6_gso_send_check, |
adcfc7d0 | 170 | .gso_segment = ipv6_gso_segment, |
1da177e4 LT |
171 | }; |
172 | ||
173 | struct ip6_ra_chain *ip6_ra_chain; | |
174 | DEFINE_RWLOCK(ip6_ra_lock); | |
175 | ||
176 | int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *)) | |
177 | { | |
178 | struct ip6_ra_chain *ra, *new_ra, **rap; | |
179 | ||
180 | /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ | |
181 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num != IPPROTO_RAW) | |
182 | return -EINVAL; | |
183 | ||
184 | new_ra = (sel>=0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; | |
185 | ||
186 | write_lock_bh(&ip6_ra_lock); | |
187 | for (rap = &ip6_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { | |
188 | if (ra->sk == sk) { | |
189 | if (sel>=0) { | |
190 | write_unlock_bh(&ip6_ra_lock); | |
a51482bd | 191 | kfree(new_ra); |
1da177e4 LT |
192 | return -EADDRINUSE; |
193 | } | |
194 | ||
195 | *rap = ra->next; | |
196 | write_unlock_bh(&ip6_ra_lock); | |
197 | ||
198 | if (ra->destructor) | |
199 | ra->destructor(sk); | |
200 | sock_put(sk); | |
201 | kfree(ra); | |
202 | return 0; | |
203 | } | |
204 | } | |
205 | if (new_ra == NULL) { | |
206 | write_unlock_bh(&ip6_ra_lock); | |
207 | return -ENOBUFS; | |
208 | } | |
209 | new_ra->sk = sk; | |
210 | new_ra->sel = sel; | |
211 | new_ra->destructor = destructor; | |
212 | new_ra->next = ra; | |
213 | *rap = new_ra; | |
214 | sock_hold(sk); | |
215 | write_unlock_bh(&ip6_ra_lock); | |
216 | return 0; | |
217 | } | |
218 | ||
3fdadf7d | 219 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
220 | char __user *optval, int optlen) |
221 | { | |
222 | struct ipv6_pinfo *np = inet6_sk(sk); | |
223 | int val, valbool; | |
224 | int retv = -ENOPROTOOPT; | |
225 | ||
1da177e4 LT |
226 | if (optval == NULL) |
227 | val=0; | |
228 | else if (get_user(val, (int __user *) optval)) | |
229 | return -EFAULT; | |
230 | ||
231 | valbool = (val!=0); | |
232 | ||
233 | lock_sock(sk); | |
234 | ||
235 | switch (optname) { | |
236 | ||
237 | case IPV6_ADDRFORM: | |
238 | if (val == PF_INET) { | |
239 | struct ipv6_txoptions *opt; | |
240 | struct sk_buff *pktopt; | |
241 | ||
242 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 243 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 LT |
244 | sk->sk_protocol != IPPROTO_TCP) |
245 | break; | |
246 | ||
247 | if (sk->sk_state != TCP_ESTABLISHED) { | |
248 | retv = -ENOTCONN; | |
249 | break; | |
250 | } | |
251 | ||
252 | if (ipv6_only_sock(sk) || | |
253 | !(ipv6_addr_type(&np->daddr) & IPV6_ADDR_MAPPED)) { | |
254 | retv = -EADDRNOTAVAIL; | |
255 | break; | |
256 | } | |
257 | ||
258 | fl6_free_socklist(sk); | |
259 | ipv6_sock_mc_close(sk); | |
260 | ||
e6848976 ACM |
261 | /* |
262 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
263 | * remove it from the refcnt debug socks count in the | |
264 | * original family... | |
265 | */ | |
266 | sk_refcnt_debug_dec(sk); | |
267 | ||
1da177e4 | 268 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 269 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 LT |
270 | |
271 | local_bh_disable(); | |
272 | sock_prot_dec_use(sk->sk_prot); | |
273 | sock_prot_inc_use(&tcp_prot); | |
274 | local_bh_enable(); | |
275 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 276 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
277 | sk->sk_socket->ops = &inet_stream_ops; |
278 | sk->sk_family = PF_INET; | |
d83d8461 | 279 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 280 | } else { |
ba4e58ec GR |
281 | struct proto *prot = &udp_prot; |
282 | ||
283 | if (sk->sk_protocol == IPPROTO_UDPLITE) | |
284 | prot = &udplite_prot; | |
1da177e4 LT |
285 | local_bh_disable(); |
286 | sock_prot_dec_use(sk->sk_prot); | |
ba4e58ec | 287 | sock_prot_inc_use(prot); |
1da177e4 | 288 | local_bh_enable(); |
ba4e58ec | 289 | sk->sk_prot = prot; |
1da177e4 LT |
290 | sk->sk_socket->ops = &inet_dgram_ops; |
291 | sk->sk_family = PF_INET; | |
292 | } | |
293 | opt = xchg(&np->opt, NULL); | |
294 | if (opt) | |
295 | sock_kfree_s(sk, opt, opt->tot_len); | |
296 | pktopt = xchg(&np->pktoptions, NULL); | |
297 | if (pktopt) | |
298 | kfree_skb(pktopt); | |
299 | ||
300 | sk->sk_destruct = inet_sock_destruct; | |
e6848976 ACM |
301 | /* |
302 | * ... and add it to the refcnt debug socks count | |
303 | * in the new family. -acme | |
304 | */ | |
305 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
306 | module_put(THIS_MODULE); |
307 | retv = 0; | |
308 | break; | |
309 | } | |
310 | goto e_inval; | |
311 | ||
312 | case IPV6_V6ONLY: | |
313 | if (inet_sk(sk)->num) | |
314 | goto e_inval; | |
315 | np->ipv6only = valbool; | |
316 | retv = 0; | |
317 | break; | |
318 | ||
333fad53 | 319 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
320 | np->rxopt.bits.rxinfo = valbool; |
321 | retv = 0; | |
322 | break; | |
333fad53 YH |
323 | |
324 | case IPV6_2292PKTINFO: | |
325 | np->rxopt.bits.rxoinfo = valbool; | |
326 | retv = 0; | |
327 | break; | |
1da177e4 | 328 | |
333fad53 | 329 | case IPV6_RECVHOPLIMIT: |
1da177e4 LT |
330 | np->rxopt.bits.rxhlim = valbool; |
331 | retv = 0; | |
332 | break; | |
333 | ||
333fad53 YH |
334 | case IPV6_2292HOPLIMIT: |
335 | np->rxopt.bits.rxohlim = valbool; | |
336 | retv = 0; | |
337 | break; | |
338 | ||
339 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
340 | if (val < 0 || val > 2) |
341 | goto e_inval; | |
342 | np->rxopt.bits.srcrt = val; | |
343 | retv = 0; | |
344 | break; | |
345 | ||
333fad53 YH |
346 | case IPV6_2292RTHDR: |
347 | if (val < 0 || val > 2) | |
348 | goto e_inval; | |
349 | np->rxopt.bits.osrcrt = val; | |
350 | retv = 0; | |
351 | break; | |
352 | ||
353 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
354 | np->rxopt.bits.hopopts = valbool; |
355 | retv = 0; | |
356 | break; | |
357 | ||
333fad53 YH |
358 | case IPV6_2292HOPOPTS: |
359 | np->rxopt.bits.ohopopts = valbool; | |
360 | retv = 0; | |
361 | break; | |
362 | ||
363 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
364 | np->rxopt.bits.dstopts = valbool; |
365 | retv = 0; | |
366 | break; | |
367 | ||
333fad53 YH |
368 | case IPV6_2292DSTOPTS: |
369 | np->rxopt.bits.odstopts = valbool; | |
370 | retv = 0; | |
371 | break; | |
372 | ||
41a1f8ea | 373 | case IPV6_TCLASS: |
d0ee011f | 374 | if (val < -1 || val > 0xff) |
41a1f8ea YH |
375 | goto e_inval; |
376 | np->tclass = val; | |
377 | retv = 0; | |
378 | break; | |
379 | ||
380 | case IPV6_RECVTCLASS: | |
381 | np->rxopt.bits.rxtclass = valbool; | |
382 | retv = 0; | |
383 | break; | |
384 | ||
1da177e4 LT |
385 | case IPV6_FLOWINFO: |
386 | np->rxopt.bits.rxflow = valbool; | |
387 | retv = 0; | |
388 | break; | |
389 | ||
333fad53 YH |
390 | case IPV6_HOPOPTS: |
391 | case IPV6_RTHDRDSTOPTS: | |
392 | case IPV6_RTHDR: | |
393 | case IPV6_DSTOPTS: | |
394 | { | |
395 | struct ipv6_txoptions *opt; | |
396 | if (optlen == 0) | |
cb422c46 | 397 | optval = NULL; |
333fad53 YH |
398 | |
399 | /* hop-by-hop / destination options are privileged option */ | |
400 | retv = -EPERM; | |
401 | if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) | |
402 | break; | |
403 | ||
404 | retv = -EINVAL; | |
405 | if (optlen & 0x7 || optlen > 8 * 255) | |
406 | break; | |
407 | ||
408 | opt = ipv6_renew_options(sk, np->opt, optname, | |
409 | (struct ipv6_opt_hdr __user *)optval, | |
410 | optlen); | |
411 | if (IS_ERR(opt)) { | |
412 | retv = PTR_ERR(opt); | |
413 | break; | |
414 | } | |
415 | ||
416 | /* routing header option needs extra check */ | |
417 | if (optname == IPV6_RTHDR && opt->srcrt) { | |
418 | struct ipv6_rt_hdr *rthdr = opt->srcrt; | |
280a9d34 MN |
419 | switch (rthdr->type) { |
420 | case IPV6_SRCRT_TYPE_0: | |
421 | #ifdef CONFIG_IPV6_MIP6 | |
422 | case IPV6_SRCRT_TYPE_2: | |
423 | #endif | |
424 | break; | |
425 | default: | |
333fad53 | 426 | goto sticky_done; |
280a9d34 MN |
427 | } |
428 | ||
333fad53 YH |
429 | if ((rthdr->hdrlen & 1) || |
430 | (rthdr->hdrlen >> 1) != rthdr->segments_left) | |
431 | goto sticky_done; | |
432 | } | |
433 | ||
434 | retv = 0; | |
d83d8461 | 435 | if (inet_sk(sk)->is_icsk) { |
333fad53 | 436 | if (opt) { |
d83d8461 | 437 | struct inet_connection_sock *icsk = inet_csk(sk); |
333fad53 YH |
438 | if (!((1 << sk->sk_state) & |
439 | (TCPF_LISTEN | TCPF_CLOSE)) | |
440 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
d83d8461 ACM |
441 | icsk->icsk_ext_hdr_len = |
442 | opt->opt_flen + opt->opt_nflen; | |
443 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
333fad53 YH |
444 | } |
445 | } | |
446 | opt = xchg(&np->opt, opt); | |
447 | sk_dst_reset(sk); | |
448 | } else { | |
449 | write_lock(&sk->sk_dst_lock); | |
450 | opt = xchg(&np->opt, opt); | |
451 | write_unlock(&sk->sk_dst_lock); | |
452 | sk_dst_reset(sk); | |
453 | } | |
454 | sticky_done: | |
455 | if (opt) | |
456 | sock_kfree_s(sk, opt, opt->tot_len); | |
457 | break; | |
458 | } | |
459 | ||
460 | case IPV6_2292PKTOPTIONS: | |
1da177e4 LT |
461 | { |
462 | struct ipv6_txoptions *opt = NULL; | |
463 | struct msghdr msg; | |
464 | struct flowi fl; | |
465 | int junk; | |
466 | ||
467 | fl.fl6_flowlabel = 0; | |
468 | fl.oif = sk->sk_bound_dev_if; | |
469 | ||
470 | if (optlen == 0) | |
471 | goto update; | |
472 | ||
473 | /* 1K is probably excessive | |
474 | * 1K is surely not enough, 2K per standard header is 16K. | |
475 | */ | |
476 | retv = -EINVAL; | |
477 | if (optlen > 64*1024) | |
478 | break; | |
479 | ||
480 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
481 | retv = -ENOBUFS; | |
482 | if (opt == NULL) | |
483 | break; | |
484 | ||
485 | memset(opt, 0, sizeof(*opt)); | |
486 | opt->tot_len = sizeof(*opt) + optlen; | |
487 | retv = -EFAULT; | |
488 | if (copy_from_user(opt+1, optval, optlen)) | |
489 | goto done; | |
490 | ||
491 | msg.msg_controllen = optlen; | |
492 | msg.msg_control = (void*)(opt+1); | |
493 | ||
41a1f8ea | 494 | retv = datagram_send_ctl(&msg, &fl, opt, &junk, &junk); |
1da177e4 LT |
495 | if (retv) |
496 | goto done; | |
497 | update: | |
498 | retv = 0; | |
d83d8461 | 499 | if (inet_sk(sk)->is_icsk) { |
1da177e4 | 500 | if (opt) { |
d83d8461 | 501 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 LT |
502 | if (!((1 << sk->sk_state) & |
503 | (TCPF_LISTEN | TCPF_CLOSE)) | |
504 | && inet_sk(sk)->daddr != LOOPBACK4_IPV6) { | |
d83d8461 ACM |
505 | icsk->icsk_ext_hdr_len = |
506 | opt->opt_flen + opt->opt_nflen; | |
507 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
1da177e4 LT |
508 | } |
509 | } | |
510 | opt = xchg(&np->opt, opt); | |
511 | sk_dst_reset(sk); | |
512 | } else { | |
513 | write_lock(&sk->sk_dst_lock); | |
514 | opt = xchg(&np->opt, opt); | |
515 | write_unlock(&sk->sk_dst_lock); | |
516 | sk_dst_reset(sk); | |
517 | } | |
518 | ||
519 | done: | |
520 | if (opt) | |
521 | sock_kfree_s(sk, opt, opt->tot_len); | |
522 | break; | |
523 | } | |
524 | case IPV6_UNICAST_HOPS: | |
525 | if (val > 255 || val < -1) | |
526 | goto e_inval; | |
527 | np->hop_limit = val; | |
528 | retv = 0; | |
529 | break; | |
530 | ||
531 | case IPV6_MULTICAST_HOPS: | |
532 | if (sk->sk_type == SOCK_STREAM) | |
533 | goto e_inval; | |
534 | if (val > 255 || val < -1) | |
535 | goto e_inval; | |
536 | np->mcast_hops = val; | |
537 | retv = 0; | |
538 | break; | |
539 | ||
540 | case IPV6_MULTICAST_LOOP: | |
541 | np->mc_loop = valbool; | |
542 | retv = 0; | |
543 | break; | |
544 | ||
545 | case IPV6_MULTICAST_IF: | |
546 | if (sk->sk_type == SOCK_STREAM) | |
547 | goto e_inval; | |
548 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) | |
549 | goto e_inval; | |
550 | ||
551 | if (__dev_get_by_index(val) == NULL) { | |
552 | retv = -ENODEV; | |
553 | break; | |
554 | } | |
555 | np->mcast_oif = val; | |
556 | retv = 0; | |
557 | break; | |
558 | case IPV6_ADD_MEMBERSHIP: | |
559 | case IPV6_DROP_MEMBERSHIP: | |
560 | { | |
561 | struct ipv6_mreq mreq; | |
562 | ||
563 | retv = -EFAULT; | |
564 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
565 | break; | |
566 | ||
567 | if (optname == IPV6_ADD_MEMBERSHIP) | |
568 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
569 | else | |
570 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); | |
571 | break; | |
572 | } | |
573 | case IPV6_JOIN_ANYCAST: | |
574 | case IPV6_LEAVE_ANYCAST: | |
575 | { | |
576 | struct ipv6_mreq mreq; | |
577 | ||
578 | if (optlen != sizeof(struct ipv6_mreq)) | |
579 | goto e_inval; | |
580 | ||
581 | retv = -EFAULT; | |
582 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
583 | break; | |
584 | ||
585 | if (optname == IPV6_JOIN_ANYCAST) | |
586 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
587 | else | |
588 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
589 | break; | |
590 | } | |
591 | case MCAST_JOIN_GROUP: | |
592 | case MCAST_LEAVE_GROUP: | |
593 | { | |
594 | struct group_req greq; | |
595 | struct sockaddr_in6 *psin6; | |
596 | ||
597 | retv = -EFAULT; | |
598 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
599 | break; | |
600 | if (greq.gr_group.ss_family != AF_INET6) { | |
601 | retv = -EADDRNOTAVAIL; | |
602 | break; | |
603 | } | |
604 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
605 | if (optname == MCAST_JOIN_GROUP) | |
606 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, | |
607 | &psin6->sin6_addr); | |
608 | else | |
609 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, | |
610 | &psin6->sin6_addr); | |
611 | break; | |
612 | } | |
613 | case MCAST_JOIN_SOURCE_GROUP: | |
614 | case MCAST_LEAVE_SOURCE_GROUP: | |
615 | case MCAST_BLOCK_SOURCE: | |
616 | case MCAST_UNBLOCK_SOURCE: | |
617 | { | |
618 | struct group_source_req greqs; | |
619 | int omode, add; | |
620 | ||
621 | if (optlen != sizeof(struct group_source_req)) | |
622 | goto e_inval; | |
623 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
624 | retv = -EFAULT; | |
625 | break; | |
626 | } | |
627 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
628 | greqs.gsr_source.ss_family != AF_INET6) { | |
629 | retv = -EADDRNOTAVAIL; | |
630 | break; | |
631 | } | |
632 | if (optname == MCAST_BLOCK_SOURCE) { | |
633 | omode = MCAST_EXCLUDE; | |
634 | add = 1; | |
635 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
636 | omode = MCAST_EXCLUDE; | |
637 | add = 0; | |
638 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
639 | struct sockaddr_in6 *psin6; | |
640 | ||
641 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
642 | retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, | |
643 | &psin6->sin6_addr); | |
c9e3e8b6 DS |
644 | /* prior join w/ different source is ok */ |
645 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
646 | break; |
647 | omode = MCAST_INCLUDE; | |
648 | add = 1; | |
c9e3e8b6 | 649 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
650 | omode = MCAST_INCLUDE; |
651 | add = 0; | |
652 | } | |
653 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
654 | break; | |
655 | } | |
656 | case MCAST_MSFILTER: | |
657 | { | |
1da177e4 LT |
658 | extern int sysctl_mld_max_msf; |
659 | struct group_filter *gsf; | |
660 | ||
661 | if (optlen < GROUP_FILTER_SIZE(0)) | |
662 | goto e_inval; | |
663 | if (optlen > sysctl_optmem_max) { | |
664 | retv = -ENOBUFS; | |
665 | break; | |
666 | } | |
8b3a7005 | 667 | gsf = kmalloc(optlen,GFP_KERNEL); |
1da177e4 LT |
668 | if (gsf == 0) { |
669 | retv = -ENOBUFS; | |
670 | break; | |
671 | } | |
672 | retv = -EFAULT; | |
673 | if (copy_from_user(gsf, optval, optlen)) { | |
674 | kfree(gsf); | |
675 | break; | |
676 | } | |
677 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
678 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
679 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
680 | kfree(gsf); | |
681 | retv = -ENOBUFS; | |
682 | break; | |
683 | } | |
684 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
685 | kfree(gsf); | |
686 | retv = -EINVAL; | |
687 | break; | |
688 | } | |
689 | retv = ip6_mc_msfilter(sk, gsf); | |
690 | kfree(gsf); | |
691 | ||
692 | break; | |
693 | } | |
694 | case IPV6_ROUTER_ALERT: | |
695 | retv = ip6_ra_control(sk, val, NULL); | |
696 | break; | |
697 | case IPV6_MTU_DISCOVER: | |
698 | if (val<0 || val>2) | |
699 | goto e_inval; | |
700 | np->pmtudisc = val; | |
701 | retv = 0; | |
702 | break; | |
703 | case IPV6_MTU: | |
704 | if (val && val < IPV6_MIN_MTU) | |
705 | goto e_inval; | |
706 | np->frag_size = val; | |
707 | retv = 0; | |
708 | break; | |
709 | case IPV6_RECVERR: | |
710 | np->recverr = valbool; | |
711 | if (!val) | |
712 | skb_queue_purge(&sk->sk_error_queue); | |
713 | retv = 0; | |
714 | break; | |
715 | case IPV6_FLOWINFO_SEND: | |
716 | np->sndflow = valbool; | |
717 | retv = 0; | |
718 | break; | |
719 | case IPV6_FLOWLABEL_MGR: | |
720 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
721 | break; | |
722 | case IPV6_IPSEC_POLICY: | |
723 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 HX |
724 | retv = -EPERM; |
725 | if (!capable(CAP_NET_ADMIN)) | |
726 | break; | |
1da177e4 LT |
727 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
728 | break; | |
729 | ||
1da177e4 LT |
730 | } |
731 | release_sock(sk); | |
732 | ||
1da177e4 LT |
733 | return retv; |
734 | ||
735 | e_inval: | |
736 | release_sock(sk); | |
737 | return -EINVAL; | |
738 | } | |
739 | ||
3fdadf7d DM |
740 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
741 | char __user *optval, int optlen) | |
742 | { | |
743 | int err; | |
744 | ||
745 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
746 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
747 | ||
748 | if (level != SOL_IPV6) | |
749 | return -ENOPROTOOPT; | |
750 | ||
751 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
752 | #ifdef CONFIG_NETFILTER | |
753 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
754 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
755 | optname != IPV6_XFRM_POLICY) { | |
756 | lock_sock(sk); | |
757 | err = nf_setsockopt(sk, PF_INET6, optname, optval, | |
758 | optlen); | |
759 | release_sock(sk); | |
760 | } | |
761 | #endif | |
762 | return err; | |
763 | } | |
764 | ||
765 | ||
766 | #ifdef CONFIG_COMPAT | |
767 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 768 | char __user *optval, int optlen) |
3fdadf7d DM |
769 | { |
770 | int err; | |
771 | ||
772 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
773 | if (udp_prot.compat_setsockopt != NULL) |
774 | return udp_prot.compat_setsockopt(sk, level, optname, | |
775 | optval, optlen); | |
776 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
777 | } |
778 | ||
779 | if (level != SOL_IPV6) | |
780 | return -ENOPROTOOPT; | |
781 | ||
782 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
783 | #ifdef CONFIG_NETFILTER | |
784 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
785 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
543d9cfe | 786 | optname != IPV6_XFRM_POLICY) { |
3fdadf7d | 787 | lock_sock(sk); |
543d9cfe ACM |
788 | err = compat_nf_setsockopt(sk, PF_INET6, optname, |
789 | optval, optlen); | |
3fdadf7d DM |
790 | release_sock(sk); |
791 | } | |
792 | #endif | |
793 | return err; | |
794 | } | |
543d9cfe ACM |
795 | |
796 | EXPORT_SYMBOL(compat_ipv6_setsockopt); | |
3fdadf7d DM |
797 | #endif |
798 | ||
34a0b3cd AB |
799 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr, |
800 | char __user *optval, int len) | |
333fad53 YH |
801 | { |
802 | if (!hdr) | |
803 | return 0; | |
804 | len = min_t(int, len, ipv6_optlen(hdr)); | |
805 | if (copy_to_user(optval, hdr, ipv6_optlen(hdr))) | |
806 | return -EFAULT; | |
807 | return len; | |
808 | } | |
809 | ||
3fdadf7d | 810 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
1da177e4 LT |
811 | char __user *optval, int __user *optlen) |
812 | { | |
813 | struct ipv6_pinfo *np = inet6_sk(sk); | |
814 | int len; | |
815 | int val; | |
816 | ||
1da177e4 LT |
817 | if (get_user(len, optlen)) |
818 | return -EFAULT; | |
819 | switch (optname) { | |
820 | case IPV6_ADDRFORM: | |
821 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 822 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 LT |
823 | sk->sk_protocol != IPPROTO_TCP) |
824 | return -EINVAL; | |
825 | if (sk->sk_state != TCP_ESTABLISHED) | |
826 | return -ENOTCONN; | |
827 | val = sk->sk_family; | |
828 | break; | |
829 | case MCAST_MSFILTER: | |
830 | { | |
831 | struct group_filter gsf; | |
832 | int err; | |
833 | ||
834 | if (len < GROUP_FILTER_SIZE(0)) | |
835 | return -EINVAL; | |
836 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
837 | return -EFAULT; | |
838 | lock_sock(sk); | |
839 | err = ip6_mc_msfget(sk, &gsf, | |
840 | (struct group_filter __user *)optval, optlen); | |
841 | release_sock(sk); | |
842 | return err; | |
843 | } | |
844 | ||
333fad53 | 845 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
846 | { |
847 | struct msghdr msg; | |
848 | struct sk_buff *skb; | |
849 | ||
850 | if (sk->sk_type != SOCK_STREAM) | |
851 | return -ENOPROTOOPT; | |
852 | ||
853 | msg.msg_control = optval; | |
854 | msg.msg_controllen = len; | |
855 | msg.msg_flags = 0; | |
856 | ||
857 | lock_sock(sk); | |
858 | skb = np->pktoptions; | |
859 | if (skb) | |
860 | atomic_inc(&skb->users); | |
861 | release_sock(sk); | |
862 | ||
863 | if (skb) { | |
864 | int err = datagram_recv_ctl(sk, &msg, skb); | |
865 | kfree_skb(skb); | |
866 | if (err) | |
867 | return err; | |
868 | } else { | |
869 | if (np->rxopt.bits.rxinfo) { | |
870 | struct in6_pktinfo src_info; | |
871 | src_info.ipi6_ifindex = np->mcast_oif; | |
872 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
873 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); | |
874 | } | |
875 | if (np->rxopt.bits.rxhlim) { | |
876 | int hlim = np->mcast_hops; | |
877 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
878 | } | |
333fad53 YH |
879 | if (np->rxopt.bits.rxoinfo) { |
880 | struct in6_pktinfo src_info; | |
881 | src_info.ipi6_ifindex = np->mcast_oif; | |
882 | ipv6_addr_copy(&src_info.ipi6_addr, &np->daddr); | |
883 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); | |
884 | } | |
885 | if (np->rxopt.bits.rxohlim) { | |
886 | int hlim = np->mcast_hops; | |
887 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
888 | } | |
1da177e4 LT |
889 | } |
890 | len -= msg.msg_controllen; | |
891 | return put_user(len, optlen); | |
892 | } | |
893 | case IPV6_MTU: | |
894 | { | |
895 | struct dst_entry *dst; | |
896 | val = 0; | |
897 | lock_sock(sk); | |
898 | dst = sk_dst_get(sk); | |
899 | if (dst) { | |
900 | val = dst_mtu(dst); | |
901 | dst_release(dst); | |
902 | } | |
903 | release_sock(sk); | |
904 | if (!val) | |
905 | return -ENOTCONN; | |
906 | break; | |
907 | } | |
908 | ||
909 | case IPV6_V6ONLY: | |
910 | val = np->ipv6only; | |
911 | break; | |
912 | ||
333fad53 | 913 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
914 | val = np->rxopt.bits.rxinfo; |
915 | break; | |
916 | ||
333fad53 YH |
917 | case IPV6_2292PKTINFO: |
918 | val = np->rxopt.bits.rxoinfo; | |
919 | break; | |
920 | ||
921 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
922 | val = np->rxopt.bits.rxhlim; |
923 | break; | |
924 | ||
333fad53 YH |
925 | case IPV6_2292HOPLIMIT: |
926 | val = np->rxopt.bits.rxohlim; | |
927 | break; | |
928 | ||
929 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
930 | val = np->rxopt.bits.srcrt; |
931 | break; | |
932 | ||
333fad53 YH |
933 | case IPV6_2292RTHDR: |
934 | val = np->rxopt.bits.osrcrt; | |
935 | break; | |
936 | ||
1da177e4 | 937 | case IPV6_HOPOPTS: |
333fad53 YH |
938 | case IPV6_RTHDRDSTOPTS: |
939 | case IPV6_RTHDR: | |
940 | case IPV6_DSTOPTS: | |
941 | { | |
942 | ||
943 | lock_sock(sk); | |
944 | len = ipv6_getsockopt_sticky(sk, np->opt->hopopt, | |
945 | optval, len); | |
946 | release_sock(sk); | |
947 | return put_user(len, optlen); | |
948 | } | |
949 | ||
950 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
951 | val = np->rxopt.bits.hopopts; |
952 | break; | |
953 | ||
333fad53 YH |
954 | case IPV6_2292HOPOPTS: |
955 | val = np->rxopt.bits.ohopopts; | |
956 | break; | |
957 | ||
958 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
959 | val = np->rxopt.bits.dstopts; |
960 | break; | |
961 | ||
333fad53 YH |
962 | case IPV6_2292DSTOPTS: |
963 | val = np->rxopt.bits.odstopts; | |
964 | break; | |
965 | ||
41a1f8ea YH |
966 | case IPV6_TCLASS: |
967 | val = np->tclass; | |
d0ee011f RDC |
968 | if (val < 0) |
969 | val = 0; | |
41a1f8ea YH |
970 | break; |
971 | ||
972 | case IPV6_RECVTCLASS: | |
973 | val = np->rxopt.bits.rxtclass; | |
974 | break; | |
975 | ||
1da177e4 LT |
976 | case IPV6_FLOWINFO: |
977 | val = np->rxopt.bits.rxflow; | |
978 | break; | |
979 | ||
980 | case IPV6_UNICAST_HOPS: | |
1da177e4 | 981 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
982 | { |
983 | struct dst_entry *dst; | |
984 | ||
985 | if (optname == IPV6_UNICAST_HOPS) | |
986 | val = np->hop_limit; | |
987 | else | |
988 | val = np->mcast_hops; | |
989 | ||
990 | dst = sk_dst_get(sk); | |
991 | if (dst) { | |
992 | if (val < 0) | |
993 | val = dst_metric(dst, RTAX_HOPLIMIT); | |
994 | if (val < 0) | |
995 | val = ipv6_get_hoplimit(dst->dev); | |
996 | dst_release(dst); | |
997 | } | |
998 | if (val < 0) | |
999 | val = ipv6_devconf.hop_limit; | |
1da177e4 | 1000 | break; |
befffe90 | 1001 | } |
1da177e4 LT |
1002 | |
1003 | case IPV6_MULTICAST_LOOP: | |
1004 | val = np->mc_loop; | |
1005 | break; | |
1006 | ||
1007 | case IPV6_MULTICAST_IF: | |
1008 | val = np->mcast_oif; | |
1009 | break; | |
1010 | ||
1011 | case IPV6_MTU_DISCOVER: | |
1012 | val = np->pmtudisc; | |
1013 | break; | |
1014 | ||
1015 | case IPV6_RECVERR: | |
1016 | val = np->recverr; | |
1017 | break; | |
1018 | ||
1019 | case IPV6_FLOWINFO_SEND: | |
1020 | val = np->sndflow; | |
1021 | break; | |
1022 | ||
1023 | default: | |
1da177e4 | 1024 | return -EINVAL; |
1da177e4 LT |
1025 | } |
1026 | len = min_t(unsigned int, sizeof(int), len); | |
1027 | if(put_user(len, optlen)) | |
1028 | return -EFAULT; | |
1029 | if(copy_to_user(optval,&val,len)) | |
1030 | return -EFAULT; | |
1031 | return 0; | |
1032 | } | |
1033 | ||
3fdadf7d DM |
1034 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1035 | char __user *optval, int __user *optlen) | |
1036 | { | |
1037 | int err; | |
1038 | ||
1039 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1040 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1041 | ||
1042 | if(level != SOL_IPV6) | |
1043 | return -ENOPROTOOPT; | |
1044 | ||
1045 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1046 | #ifdef CONFIG_NETFILTER | |
1047 | /* we need to exclude all possible EINVALs except default case */ | |
443da0d5 | 1048 | if (err == -EINVAL && optname != IPV6_ADDRFORM && |
3fdadf7d DM |
1049 | optname != MCAST_MSFILTER) { |
1050 | int len; | |
1051 | ||
1052 | if (get_user(len, optlen)) | |
1053 | return -EFAULT; | |
1054 | ||
1055 | lock_sock(sk); | |
1056 | err = nf_getsockopt(sk, PF_INET6, optname, optval, | |
1057 | &len); | |
1058 | release_sock(sk); | |
1059 | if (err >= 0) | |
1060 | err = put_user(len, optlen); | |
1061 | } | |
1062 | #endif | |
1063 | return err; | |
1064 | } | |
1065 | ||
1066 | #ifdef CONFIG_COMPAT | |
1067 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1068 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1069 | { |
1070 | int err; | |
1071 | ||
1072 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1073 | if (udp_prot.compat_getsockopt != NULL) |
1074 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1075 | optval, optlen); | |
1076 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1077 | } |
1078 | ||
543d9cfe | 1079 | if (level != SOL_IPV6) |
3fdadf7d DM |
1080 | return -ENOPROTOOPT; |
1081 | ||
1082 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen); | |
1083 | #ifdef CONFIG_NETFILTER | |
1084 | /* we need to exclude all possible EINVALs except default case */ | |
443da0d5 | 1085 | if (err == -EINVAL && optname != IPV6_ADDRFORM && |
3fdadf7d DM |
1086 | optname != MCAST_MSFILTER) { |
1087 | int len; | |
1088 | ||
1089 | if (get_user(len, optlen)) | |
1090 | return -EFAULT; | |
1091 | ||
1092 | lock_sock(sk); | |
543d9cfe ACM |
1093 | err = compat_nf_getsockopt(sk, PF_INET6, |
1094 | optname, optval, &len); | |
3fdadf7d DM |
1095 | release_sock(sk); |
1096 | if (err >= 0) | |
1097 | err = put_user(len, optlen); | |
1098 | } | |
1099 | #endif | |
1100 | return err; | |
1101 | } | |
543d9cfe ACM |
1102 | |
1103 | EXPORT_SYMBOL(compat_ipv6_getsockopt); | |
3fdadf7d DM |
1104 | #endif |
1105 | ||
1da177e4 LT |
1106 | void __init ipv6_packet_init(void) |
1107 | { | |
1108 | dev_add_pack(&ipv6_packet_type); | |
1109 | } | |
1110 | ||
1111 | void ipv6_packet_cleanup(void) | |
1112 | { | |
1113 | dev_remove_pack(&ipv6_packet_type); | |
1114 | } |