Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * IPv6 BSD socket options interface | |
1ab1457c | 4 | * Linux INET6 implementation |
1da177e4 LT |
5 | * |
6 | * Authors: | |
1ab1457c | 7 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
8 | * |
9 | * Based on linux/net/ipv4/ip_sockglue.c | |
10 | * | |
1da177e4 LT |
11 | * FIXME: Make the setsockopt code POSIX compliant: That is |
12 | * | |
1da177e4 LT |
13 | * o Truncate getsockopt returns |
14 | * o Return an optlen of the truncated length if need be | |
15 | * | |
16 | * Changes: | |
17 | * David L Stevens <dlstevens@us.ibm.com>: | |
18 | * - added multicast source filtering API for MLDv2 | |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
4fc268d2 | 22 | #include <linux/capability.h> |
1da177e4 LT |
23 | #include <linux/errno.h> |
24 | #include <linux/types.h> | |
25 | #include <linux/socket.h> | |
26 | #include <linux/sockios.h> | |
1da177e4 LT |
27 | #include <linux/net.h> |
28 | #include <linux/in6.h> | |
7bc570c8 | 29 | #include <linux/mroute6.h> |
1da177e4 LT |
30 | #include <linux/netdevice.h> |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/sysctl.h> | |
34 | #include <linux/netfilter.h> | |
5a0e3ad6 | 35 | #include <linux/slab.h> |
1da177e4 LT |
36 | |
37 | #include <net/sock.h> | |
38 | #include <net/snmp.h> | |
39 | #include <net/ipv6.h> | |
40 | #include <net/ndisc.h> | |
41 | #include <net/protocol.h> | |
42 | #include <net/transp_v6.h> | |
43 | #include <net/ip6_route.h> | |
44 | #include <net/addrconf.h> | |
45 | #include <net/inet_common.h> | |
46 | #include <net/tcp.h> | |
47 | #include <net/udp.h> | |
ba4e58ec | 48 | #include <net/udplite.h> |
1da177e4 | 49 | #include <net/xfrm.h> |
dae50295 | 50 | #include <net/compat.h> |
a149e7c7 | 51 | #include <net/seg6.h> |
1da177e4 | 52 | |
7c0f6ba6 | 53 | #include <linux/uaccess.h> |
1da177e4 | 54 | |
1da177e4 LT |
55 | struct ip6_ra_chain *ip6_ra_chain; |
56 | DEFINE_RWLOCK(ip6_ra_lock); | |
57 | ||
725a8ff0 | 58 | int ip6_ra_control(struct sock *sk, int sel) |
1da177e4 LT |
59 | { |
60 | struct ip6_ra_chain *ra, *new_ra, **rap; | |
61 | ||
62 | /* RA packet may be delivered ONLY to IPPROTO_RAW socket */ | |
c720c7e8 | 63 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_RAW) |
1717699c | 64 | return -ENOPROTOOPT; |
1da177e4 | 65 | |
67ba4152 | 66 | new_ra = (sel >= 0) ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; |
95baa60a GZ |
67 | if (sel >= 0 && !new_ra) |
68 | return -ENOMEM; | |
1da177e4 LT |
69 | |
70 | write_lock_bh(&ip6_ra_lock); | |
67ba4152 | 71 | for (rap = &ip6_ra_chain; (ra = *rap) != NULL; rap = &ra->next) { |
1da177e4 | 72 | if (ra->sk == sk) { |
67ba4152 | 73 | if (sel >= 0) { |
1da177e4 | 74 | write_unlock_bh(&ip6_ra_lock); |
a51482bd | 75 | kfree(new_ra); |
1da177e4 LT |
76 | return -EADDRINUSE; |
77 | } | |
78 | ||
79 | *rap = ra->next; | |
80 | write_unlock_bh(&ip6_ra_lock); | |
81 | ||
1da177e4 LT |
82 | sock_put(sk); |
83 | kfree(ra); | |
84 | return 0; | |
85 | } | |
86 | } | |
63159f29 | 87 | if (!new_ra) { |
1da177e4 LT |
88 | write_unlock_bh(&ip6_ra_lock); |
89 | return -ENOBUFS; | |
90 | } | |
91 | new_ra->sk = sk; | |
92 | new_ra->sel = sel; | |
1da177e4 LT |
93 | new_ra->next = ra; |
94 | *rap = new_ra; | |
95 | sock_hold(sk); | |
96 | write_unlock_bh(&ip6_ra_lock); | |
97 | return 0; | |
98 | } | |
99 | ||
e7712f1a YH |
100 | struct ipv6_txoptions *ipv6_update_options(struct sock *sk, |
101 | struct ipv6_txoptions *opt) | |
102 | { | |
103 | if (inet_sk(sk)->is_icsk) { | |
104 | if (opt && | |
105 | !((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
c720c7e8 | 106 | inet_sk(sk)->inet_daddr != LOOPBACK4_IPV6) { |
e7712f1a YH |
107 | struct inet_connection_sock *icsk = inet_csk(sk); |
108 | icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; | |
109 | icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie); | |
110 | } | |
e7712f1a | 111 | } |
45f6fad8 ED |
112 | opt = xchg((__force struct ipv6_txoptions **)&inet6_sk(sk)->opt, |
113 | opt); | |
e7712f1a YH |
114 | sk_dst_reset(sk); |
115 | ||
116 | return opt; | |
117 | } | |
118 | ||
baf606d9 MRL |
119 | static bool setsockopt_needs_rtnl(int optname) |
120 | { | |
121 | switch (optname) { | |
8651be8f | 122 | case IPV6_ADDRFORM: |
baf606d9 MRL |
123 | case IPV6_ADD_MEMBERSHIP: |
124 | case IPV6_DROP_MEMBERSHIP: | |
c4a6853d MRL |
125 | case IPV6_JOIN_ANYCAST: |
126 | case IPV6_LEAVE_ANYCAST: | |
baf606d9 MRL |
127 | case MCAST_JOIN_GROUP: |
128 | case MCAST_LEAVE_GROUP: | |
54ff9ef3 MRL |
129 | case MCAST_JOIN_SOURCE_GROUP: |
130 | case MCAST_LEAVE_SOURCE_GROUP: | |
131 | case MCAST_BLOCK_SOURCE: | |
132 | case MCAST_UNBLOCK_SOURCE: | |
133 | case MCAST_MSFILTER: | |
baf606d9 MRL |
134 | return true; |
135 | } | |
136 | return false; | |
137 | } | |
138 | ||
3fdadf7d | 139 | static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 140 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
141 | { |
142 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 143 | struct net *net = sock_net(sk); |
1da177e4 LT |
144 | int val, valbool; |
145 | int retv = -ENOPROTOOPT; | |
baf606d9 | 146 | bool needs_rtnl = setsockopt_needs_rtnl(optname); |
1da177e4 | 147 | |
63159f29 | 148 | if (!optval) |
67ba4152 | 149 | val = 0; |
b2a9d7c2 YH |
150 | else { |
151 | if (optlen >= sizeof(int)) { | |
152 | if (get_user(val, (int __user *) optval)) | |
153 | return -EFAULT; | |
154 | } else | |
155 | val = 0; | |
156 | } | |
1da177e4 | 157 | |
67ba4152 | 158 | valbool = (val != 0); |
1da177e4 | 159 | |
7bc570c8 YH |
160 | if (ip6_mroute_opt(optname)) |
161 | return ip6_mroute_setsockopt(sk, optname, optval, optlen); | |
162 | ||
baf606d9 MRL |
163 | if (needs_rtnl) |
164 | rtnl_lock(); | |
1da177e4 LT |
165 | lock_sock(sk); |
166 | ||
167 | switch (optname) { | |
168 | ||
169 | case IPV6_ADDRFORM: | |
b2a9d7c2 YH |
170 | if (optlen < sizeof(int)) |
171 | goto e_inval; | |
1da177e4 LT |
172 | if (val == PF_INET) { |
173 | struct ipv6_txoptions *opt; | |
174 | struct sk_buff *pktopt; | |
175 | ||
49d074f4 DL |
176 | if (sk->sk_type == SOCK_RAW) |
177 | break; | |
178 | ||
9596cc82 DL |
179 | if (sk->sk_protocol == IPPROTO_UDP || |
180 | sk->sk_protocol == IPPROTO_UDPLITE) { | |
181 | struct udp_sock *up = udp_sk(sk); | |
182 | if (up->pending == AF_INET6) { | |
183 | retv = -EBUSY; | |
184 | break; | |
185 | } | |
186 | } else if (sk->sk_protocol != IPPROTO_TCP) | |
1da177e4 LT |
187 | break; |
188 | ||
189 | if (sk->sk_state != TCP_ESTABLISHED) { | |
190 | retv = -ENOTCONN; | |
191 | break; | |
192 | } | |
193 | ||
194 | if (ipv6_only_sock(sk) || | |
efe4208f | 195 | !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { |
1da177e4 LT |
196 | retv = -EADDRNOTAVAIL; |
197 | break; | |
198 | } | |
199 | ||
200 | fl6_free_socklist(sk); | |
8651be8f | 201 | __ipv6_sock_mc_close(sk); |
1da177e4 | 202 | |
e6848976 ACM |
203 | /* |
204 | * Sock is moving from IPv6 to IPv4 (sk_prot), so | |
205 | * remove it from the refcnt debug socks count in the | |
206 | * original family... | |
207 | */ | |
208 | sk_refcnt_debug_dec(sk); | |
209 | ||
1da177e4 | 210 | if (sk->sk_protocol == IPPROTO_TCP) { |
d83d8461 | 211 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 212 | local_bh_disable(); |
c29a0bc4 PE |
213 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
214 | sock_prot_inuse_add(net, &tcp_prot, 1); | |
1da177e4 LT |
215 | local_bh_enable(); |
216 | sk->sk_prot = &tcp_prot; | |
d83d8461 | 217 | icsk->icsk_af_ops = &ipv4_specific; |
1da177e4 LT |
218 | sk->sk_socket->ops = &inet_stream_ops; |
219 | sk->sk_family = PF_INET; | |
d83d8461 | 220 | tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); |
1da177e4 | 221 | } else { |
ba4e58ec GR |
222 | struct proto *prot = &udp_prot; |
223 | ||
db8dac20 | 224 | if (sk->sk_protocol == IPPROTO_UDPLITE) |
ba4e58ec | 225 | prot = &udplite_prot; |
1da177e4 | 226 | local_bh_disable(); |
c29a0bc4 PE |
227 | sock_prot_inuse_add(net, sk->sk_prot, -1); |
228 | sock_prot_inuse_add(net, prot, 1); | |
1da177e4 | 229 | local_bh_enable(); |
ba4e58ec | 230 | sk->sk_prot = prot; |
1da177e4 LT |
231 | sk->sk_socket->ops = &inet_dgram_ops; |
232 | sk->sk_family = PF_INET; | |
233 | } | |
45f6fad8 ED |
234 | opt = xchg((__force struct ipv6_txoptions **)&np->opt, |
235 | NULL); | |
236 | if (opt) { | |
237 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
238 | txopt_put(opt); | |
239 | } | |
1da177e4 | 240 | pktopt = xchg(&np->pktoptions, NULL); |
800d55f1 | 241 | kfree_skb(pktopt); |
1da177e4 | 242 | |
e6848976 ACM |
243 | /* |
244 | * ... and add it to the refcnt debug socks count | |
245 | * in the new family. -acme | |
246 | */ | |
247 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
248 | module_put(THIS_MODULE); |
249 | retv = 0; | |
250 | break; | |
251 | } | |
252 | goto e_inval; | |
253 | ||
254 | case IPV6_V6ONLY: | |
b2a9d7c2 | 255 | if (optlen < sizeof(int) || |
c720c7e8 | 256 | inet_sk(sk)->inet_num) |
1da177e4 | 257 | goto e_inval; |
9fe516ba | 258 | sk->sk_ipv6only = valbool; |
1da177e4 LT |
259 | retv = 0; |
260 | break; | |
261 | ||
333fad53 | 262 | case IPV6_RECVPKTINFO: |
b2a9d7c2 YH |
263 | if (optlen < sizeof(int)) |
264 | goto e_inval; | |
1da177e4 LT |
265 | np->rxopt.bits.rxinfo = valbool; |
266 | retv = 0; | |
267 | break; | |
1ab1457c | 268 | |
333fad53 | 269 | case IPV6_2292PKTINFO: |
b2a9d7c2 YH |
270 | if (optlen < sizeof(int)) |
271 | goto e_inval; | |
333fad53 YH |
272 | np->rxopt.bits.rxoinfo = valbool; |
273 | retv = 0; | |
274 | break; | |
1da177e4 | 275 | |
333fad53 | 276 | case IPV6_RECVHOPLIMIT: |
b2a9d7c2 YH |
277 | if (optlen < sizeof(int)) |
278 | goto e_inval; | |
1da177e4 LT |
279 | np->rxopt.bits.rxhlim = valbool; |
280 | retv = 0; | |
281 | break; | |
282 | ||
333fad53 | 283 | case IPV6_2292HOPLIMIT: |
b2a9d7c2 YH |
284 | if (optlen < sizeof(int)) |
285 | goto e_inval; | |
333fad53 YH |
286 | np->rxopt.bits.rxohlim = valbool; |
287 | retv = 0; | |
288 | break; | |
289 | ||
290 | case IPV6_RECVRTHDR: | |
b2a9d7c2 YH |
291 | if (optlen < sizeof(int)) |
292 | goto e_inval; | |
4c752098 | 293 | np->rxopt.bits.srcrt = valbool; |
1da177e4 LT |
294 | retv = 0; |
295 | break; | |
296 | ||
333fad53 | 297 | case IPV6_2292RTHDR: |
b2a9d7c2 YH |
298 | if (optlen < sizeof(int)) |
299 | goto e_inval; | |
4c752098 | 300 | np->rxopt.bits.osrcrt = valbool; |
333fad53 YH |
301 | retv = 0; |
302 | break; | |
303 | ||
304 | case IPV6_RECVHOPOPTS: | |
b2a9d7c2 YH |
305 | if (optlen < sizeof(int)) |
306 | goto e_inval; | |
1da177e4 LT |
307 | np->rxopt.bits.hopopts = valbool; |
308 | retv = 0; | |
309 | break; | |
310 | ||
333fad53 | 311 | case IPV6_2292HOPOPTS: |
b2a9d7c2 YH |
312 | if (optlen < sizeof(int)) |
313 | goto e_inval; | |
333fad53 YH |
314 | np->rxopt.bits.ohopopts = valbool; |
315 | retv = 0; | |
316 | break; | |
317 | ||
318 | case IPV6_RECVDSTOPTS: | |
b2a9d7c2 YH |
319 | if (optlen < sizeof(int)) |
320 | goto e_inval; | |
1da177e4 LT |
321 | np->rxopt.bits.dstopts = valbool; |
322 | retv = 0; | |
323 | break; | |
324 | ||
333fad53 | 325 | case IPV6_2292DSTOPTS: |
b2a9d7c2 YH |
326 | if (optlen < sizeof(int)) |
327 | goto e_inval; | |
333fad53 YH |
328 | np->rxopt.bits.odstopts = valbool; |
329 | retv = 0; | |
330 | break; | |
331 | ||
41a1f8ea | 332 | case IPV6_TCLASS: |
b2a9d7c2 YH |
333 | if (optlen < sizeof(int)) |
334 | goto e_inval; | |
d0ee011f | 335 | if (val < -1 || val > 0xff) |
41a1f8ea | 336 | goto e_inval; |
26ced1e4 GR |
337 | /* RFC 3542, 6.5: default traffic class of 0x0 */ |
338 | if (val == -1) | |
339 | val = 0; | |
41a1f8ea YH |
340 | np->tclass = val; |
341 | retv = 0; | |
342 | break; | |
1ab1457c | 343 | |
41a1f8ea | 344 | case IPV6_RECVTCLASS: |
b2a9d7c2 YH |
345 | if (optlen < sizeof(int)) |
346 | goto e_inval; | |
41a1f8ea YH |
347 | np->rxopt.bits.rxtclass = valbool; |
348 | retv = 0; | |
349 | break; | |
350 | ||
1da177e4 | 351 | case IPV6_FLOWINFO: |
b2a9d7c2 YH |
352 | if (optlen < sizeof(int)) |
353 | goto e_inval; | |
1da177e4 LT |
354 | np->rxopt.bits.rxflow = valbool; |
355 | retv = 0; | |
356 | break; | |
357 | ||
793b1473 BH |
358 | case IPV6_RECVPATHMTU: |
359 | if (optlen < sizeof(int)) | |
360 | goto e_inval; | |
361 | np->rxopt.bits.rxpmtu = valbool; | |
362 | retv = 0; | |
363 | break; | |
364 | ||
6c468622 | 365 | case IPV6_TRANSPARENT: |
af31f412 EB |
366 | if (valbool && !ns_capable(net->user_ns, CAP_NET_ADMIN) && |
367 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
b889416b BS |
368 | retv = -EPERM; |
369 | break; | |
370 | } | |
6c468622 BS |
371 | if (optlen < sizeof(int)) |
372 | goto e_inval; | |
373 | /* we don't have a separate transparent bit for IPV6 we use the one in the IPv4 socket */ | |
374 | inet_sk(sk)->transparent = valbool; | |
375 | retv = 0; | |
376 | break; | |
377 | ||
84e14fe3 MŻ |
378 | case IPV6_FREEBIND: |
379 | if (optlen < sizeof(int)) | |
380 | goto e_inval; | |
381 | /* we also don't have a separate freebind bit for IPV6 */ | |
382 | inet_sk(sk)->freebind = valbool; | |
383 | retv = 0; | |
384 | break; | |
385 | ||
6c468622 BS |
386 | case IPV6_RECVORIGDSTADDR: |
387 | if (optlen < sizeof(int)) | |
388 | goto e_inval; | |
389 | np->rxopt.bits.rxorigdstaddr = valbool; | |
390 | retv = 0; | |
391 | break; | |
392 | ||
333fad53 YH |
393 | case IPV6_HOPOPTS: |
394 | case IPV6_RTHDRDSTOPTS: | |
395 | case IPV6_RTHDR: | |
396 | case IPV6_DSTOPTS: | |
397 | { | |
398 | struct ipv6_txoptions *opt; | |
a9ba23d4 PM |
399 | struct ipv6_opt_hdr *new = NULL; |
400 | ||
401 | /* hop-by-hop / destination options are privileged option */ | |
402 | retv = -EPERM; | |
403 | if (optname != IPV6_RTHDR && !ns_capable(net->user_ns, CAP_NET_RAW)) | |
404 | break; | |
aea7427f SW |
405 | |
406 | /* remove any sticky options header with a zero option | |
407 | * length, per RFC3542. | |
408 | */ | |
333fad53 | 409 | if (optlen == 0) |
cb422c46 | 410 | optval = NULL; |
63159f29 | 411 | else if (!optval) |
cfb266c0 | 412 | goto e_inval; |
aea7427f SW |
413 | else if (optlen < sizeof(struct ipv6_opt_hdr) || |
414 | optlen & 0x7 || optlen > 8 * 255) | |
415 | goto e_inval; | |
a9ba23d4 PM |
416 | else { |
417 | new = memdup_user(optval, optlen); | |
418 | if (IS_ERR(new)) { | |
419 | retv = PTR_ERR(new); | |
420 | break; | |
421 | } | |
422 | if (unlikely(ipv6_optlen(new) > optlen)) { | |
423 | kfree(new); | |
424 | goto e_inval; | |
425 | } | |
426 | } | |
333fad53 | 427 | |
1e1d04e6 HFS |
428 | opt = rcu_dereference_protected(np->opt, |
429 | lockdep_sock_is_held(sk)); | |
a9ba23d4 PM |
430 | opt = ipv6_renew_options(sk, opt, optname, new); |
431 | kfree(new); | |
333fad53 YH |
432 | if (IS_ERR(opt)) { |
433 | retv = PTR_ERR(opt); | |
434 | break; | |
435 | } | |
436 | ||
437 | /* routing header option needs extra check */ | |
6e093d9d | 438 | retv = -EINVAL; |
dfee0a72 | 439 | if (optname == IPV6_RTHDR && opt && opt->srcrt) { |
333fad53 | 440 | struct ipv6_rt_hdr *rthdr = opt->srcrt; |
280a9d34 | 441 | switch (rthdr->type) { |
07a93626 | 442 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
280a9d34 | 443 | case IPV6_SRCRT_TYPE_2: |
6e093d9d BH |
444 | if (rthdr->hdrlen != 2 || |
445 | rthdr->segments_left != 1) | |
446 | goto sticky_done; | |
447 | ||
280a9d34 | 448 | break; |
bb4dbf9e | 449 | #endif |
a149e7c7 DL |
450 | case IPV6_SRCRT_TYPE_4: |
451 | { | |
452 | struct ipv6_sr_hdr *srh = (struct ipv6_sr_hdr *) | |
453 | opt->srcrt; | |
454 | ||
455 | if (!seg6_validate_srh(srh, optlen)) | |
456 | goto sticky_done; | |
457 | break; | |
458 | } | |
280a9d34 | 459 | default: |
333fad53 | 460 | goto sticky_done; |
280a9d34 | 461 | } |
333fad53 YH |
462 | } |
463 | ||
464 | retv = 0; | |
e7712f1a | 465 | opt = ipv6_update_options(sk, opt); |
333fad53 | 466 | sticky_done: |
45f6fad8 ED |
467 | if (opt) { |
468 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
469 | txopt_put(opt); | |
470 | } | |
333fad53 YH |
471 | break; |
472 | } | |
473 | ||
b24a2516 YH |
474 | case IPV6_PKTINFO: |
475 | { | |
476 | struct in6_pktinfo pkt; | |
477 | ||
478 | if (optlen == 0) | |
479 | goto e_inval; | |
63159f29 | 480 | else if (optlen < sizeof(struct in6_pktinfo) || !optval) |
b24a2516 YH |
481 | goto e_inval; |
482 | ||
914d1164 | 483 | if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) { |
b24a2516 YH |
484 | retv = -EFAULT; |
485 | break; | |
486 | } | |
d839a0eb | 487 | if (!sk_dev_equal_l3scope(sk, pkt.ipi6_ifindex)) |
b24a2516 YH |
488 | goto e_inval; |
489 | ||
490 | np->sticky_pktinfo.ipi6_ifindex = pkt.ipi6_ifindex; | |
4e3fd7a0 | 491 | np->sticky_pktinfo.ipi6_addr = pkt.ipi6_addr; |
b24a2516 YH |
492 | retv = 0; |
493 | break; | |
494 | } | |
495 | ||
333fad53 | 496 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
497 | { |
498 | struct ipv6_txoptions *opt = NULL; | |
499 | struct msghdr msg; | |
4c9483b2 | 500 | struct flowi6 fl6; |
26879da5 | 501 | struct ipcm6_cookie ipc6; |
1da177e4 | 502 | |
4c9483b2 DM |
503 | memset(&fl6, 0, sizeof(fl6)); |
504 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
505 | fl6.flowi6_mark = sk->sk_mark; | |
1da177e4 LT |
506 | |
507 | if (optlen == 0) | |
508 | goto update; | |
509 | ||
510 | /* 1K is probably excessive | |
511 | * 1K is surely not enough, 2K per standard header is 16K. | |
512 | */ | |
513 | retv = -EINVAL; | |
514 | if (optlen > 64*1024) | |
515 | break; | |
516 | ||
517 | opt = sock_kmalloc(sk, sizeof(*opt) + optlen, GFP_KERNEL); | |
518 | retv = -ENOBUFS; | |
63159f29 | 519 | if (!opt) |
1da177e4 LT |
520 | break; |
521 | ||
522 | memset(opt, 0, sizeof(*opt)); | |
0aeea21a | 523 | refcount_set(&opt->refcnt, 1); |
1da177e4 LT |
524 | opt->tot_len = sizeof(*opt) + optlen; |
525 | retv = -EFAULT; | |
526 | if (copy_from_user(opt+1, optval, optlen)) | |
527 | goto done; | |
528 | ||
529 | msg.msg_controllen = optlen; | |
67ba4152 | 530 | msg.msg_control = (void *)(opt+1); |
26879da5 | 531 | ipc6.opt = opt; |
1da177e4 | 532 | |
5fdaa88d | 533 | retv = ip6_datagram_send_ctl(net, sk, &msg, &fl6, &ipc6); |
1da177e4 LT |
534 | if (retv) |
535 | goto done; | |
536 | update: | |
537 | retv = 0; | |
e7712f1a | 538 | opt = ipv6_update_options(sk, opt); |
1da177e4 | 539 | done: |
45f6fad8 ED |
540 | if (opt) { |
541 | atomic_sub(opt->tot_len, &sk->sk_omem_alloc); | |
542 | txopt_put(opt); | |
543 | } | |
1da177e4 LT |
544 | break; |
545 | } | |
546 | case IPV6_UNICAST_HOPS: | |
b2a9d7c2 YH |
547 | if (optlen < sizeof(int)) |
548 | goto e_inval; | |
1da177e4 LT |
549 | if (val > 255 || val < -1) |
550 | goto e_inval; | |
551 | np->hop_limit = val; | |
552 | retv = 0; | |
553 | break; | |
554 | ||
555 | case IPV6_MULTICAST_HOPS: | |
556 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 557 | break; |
b2a9d7c2 YH |
558 | if (optlen < sizeof(int)) |
559 | goto e_inval; | |
1da177e4 LT |
560 | if (val > 255 || val < -1) |
561 | goto e_inval; | |
2a38e6d5 | 562 | np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val); |
1da177e4 LT |
563 | retv = 0; |
564 | break; | |
565 | ||
566 | case IPV6_MULTICAST_LOOP: | |
b2a9d7c2 YH |
567 | if (optlen < sizeof(int)) |
568 | goto e_inval; | |
28d44882 YH |
569 | if (val != valbool) |
570 | goto e_inval; | |
1da177e4 LT |
571 | np->mc_loop = valbool; |
572 | retv = 0; | |
573 | break; | |
574 | ||
c4062dfc EH |
575 | case IPV6_UNICAST_IF: |
576 | { | |
577 | struct net_device *dev = NULL; | |
578 | int ifindex; | |
579 | ||
580 | if (optlen != sizeof(int)) | |
581 | goto e_inval; | |
582 | ||
583 | ifindex = (__force int)ntohl((__force __be32)val); | |
584 | if (ifindex == 0) { | |
585 | np->ucast_oif = 0; | |
586 | retv = 0; | |
587 | break; | |
588 | } | |
589 | ||
590 | dev = dev_get_by_index(net, ifindex); | |
591 | retv = -EADDRNOTAVAIL; | |
592 | if (!dev) | |
593 | break; | |
594 | dev_put(dev); | |
595 | ||
596 | retv = -EINVAL; | |
597 | if (sk->sk_bound_dev_if) | |
598 | break; | |
599 | ||
600 | np->ucast_oif = ifindex; | |
601 | retv = 0; | |
602 | break; | |
603 | } | |
604 | ||
1da177e4 LT |
605 | case IPV6_MULTICAST_IF: |
606 | if (sk->sk_type == SOCK_STREAM) | |
1717699c | 607 | break; |
b2a9d7c2 YH |
608 | if (optlen < sizeof(int)) |
609 | goto e_inval; | |
1da177e4 | 610 | |
4953f0fc | 611 | if (val) { |
55b80503 | 612 | struct net_device *dev; |
7bb387c5 | 613 | int midx; |
55b80503 | 614 | |
7bb387c5 | 615 | rcu_read_lock(); |
4953f0fc | 616 | |
7bb387c5 | 617 | dev = dev_get_by_index_rcu(net, val); |
55b80503 | 618 | if (!dev) { |
7bb387c5 | 619 | rcu_read_unlock(); |
4953f0fc BH |
620 | retv = -ENODEV; |
621 | break; | |
622 | } | |
7bb387c5 DA |
623 | midx = l3mdev_master_ifindex_rcu(dev); |
624 | ||
625 | rcu_read_unlock(); | |
626 | ||
627 | if (sk->sk_bound_dev_if && | |
628 | sk->sk_bound_dev_if != val && | |
629 | (!midx || midx != sk->sk_bound_dev_if)) | |
630 | goto e_inval; | |
1da177e4 LT |
631 | } |
632 | np->mcast_oif = val; | |
633 | retv = 0; | |
634 | break; | |
635 | case IPV6_ADD_MEMBERSHIP: | |
636 | case IPV6_DROP_MEMBERSHIP: | |
637 | { | |
638 | struct ipv6_mreq mreq; | |
639 | ||
a28398ba WC |
640 | if (optlen < sizeof(struct ipv6_mreq)) |
641 | goto e_inval; | |
642 | ||
a96fb49b FL |
643 | retv = -EPROTO; |
644 | if (inet_sk(sk)->is_icsk) | |
645 | break; | |
646 | ||
1da177e4 LT |
647 | retv = -EFAULT; |
648 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
649 | break; | |
650 | ||
651 | if (optname == IPV6_ADD_MEMBERSHIP) | |
54ff9ef3 | 652 | retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 | 653 | else |
54ff9ef3 | 654 | retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); |
1da177e4 LT |
655 | break; |
656 | } | |
657 | case IPV6_JOIN_ANYCAST: | |
658 | case IPV6_LEAVE_ANYCAST: | |
659 | { | |
660 | struct ipv6_mreq mreq; | |
661 | ||
a28398ba | 662 | if (optlen < sizeof(struct ipv6_mreq)) |
1da177e4 LT |
663 | goto e_inval; |
664 | ||
665 | retv = -EFAULT; | |
666 | if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq))) | |
667 | break; | |
668 | ||
669 | if (optname == IPV6_JOIN_ANYCAST) | |
670 | retv = ipv6_sock_ac_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
671 | else | |
672 | retv = ipv6_sock_ac_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_acaddr); | |
673 | break; | |
674 | } | |
15033f04 AN |
675 | case IPV6_MULTICAST_ALL: |
676 | if (optlen < sizeof(int)) | |
677 | goto e_inval; | |
678 | np->mc_all = valbool; | |
679 | retv = 0; | |
680 | break; | |
681 | ||
1da177e4 LT |
682 | case MCAST_JOIN_GROUP: |
683 | case MCAST_LEAVE_GROUP: | |
684 | { | |
685 | struct group_req greq; | |
686 | struct sockaddr_in6 *psin6; | |
687 | ||
a28398ba WC |
688 | if (optlen < sizeof(struct group_req)) |
689 | goto e_inval; | |
690 | ||
1da177e4 LT |
691 | retv = -EFAULT; |
692 | if (copy_from_user(&greq, optval, sizeof(struct group_req))) | |
693 | break; | |
694 | if (greq.gr_group.ss_family != AF_INET6) { | |
695 | retv = -EADDRNOTAVAIL; | |
696 | break; | |
697 | } | |
698 | psin6 = (struct sockaddr_in6 *)&greq.gr_group; | |
699 | if (optname == MCAST_JOIN_GROUP) | |
54ff9ef3 MRL |
700 | retv = ipv6_sock_mc_join(sk, greq.gr_interface, |
701 | &psin6->sin6_addr); | |
1da177e4 | 702 | else |
54ff9ef3 MRL |
703 | retv = ipv6_sock_mc_drop(sk, greq.gr_interface, |
704 | &psin6->sin6_addr); | |
1da177e4 LT |
705 | break; |
706 | } | |
707 | case MCAST_JOIN_SOURCE_GROUP: | |
708 | case MCAST_LEAVE_SOURCE_GROUP: | |
709 | case MCAST_BLOCK_SOURCE: | |
710 | case MCAST_UNBLOCK_SOURCE: | |
711 | { | |
712 | struct group_source_req greqs; | |
713 | int omode, add; | |
714 | ||
a28398ba | 715 | if (optlen < sizeof(struct group_source_req)) |
1da177e4 LT |
716 | goto e_inval; |
717 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { | |
718 | retv = -EFAULT; | |
719 | break; | |
720 | } | |
721 | if (greqs.gsr_group.ss_family != AF_INET6 || | |
722 | greqs.gsr_source.ss_family != AF_INET6) { | |
723 | retv = -EADDRNOTAVAIL; | |
724 | break; | |
725 | } | |
726 | if (optname == MCAST_BLOCK_SOURCE) { | |
727 | omode = MCAST_EXCLUDE; | |
728 | add = 1; | |
729 | } else if (optname == MCAST_UNBLOCK_SOURCE) { | |
730 | omode = MCAST_EXCLUDE; | |
731 | add = 0; | |
732 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { | |
733 | struct sockaddr_in6 *psin6; | |
734 | ||
735 | psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; | |
c7ea20c9 HL |
736 | retv = ipv6_sock_mc_join_ssm(sk, greqs.gsr_interface, |
737 | &psin6->sin6_addr, | |
738 | MCAST_INCLUDE); | |
c9e3e8b6 DS |
739 | /* prior join w/ different source is ok */ |
740 | if (retv && retv != -EADDRINUSE) | |
1da177e4 LT |
741 | break; |
742 | omode = MCAST_INCLUDE; | |
743 | add = 1; | |
c9e3e8b6 | 744 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
1da177e4 LT |
745 | omode = MCAST_INCLUDE; |
746 | add = 0; | |
747 | } | |
748 | retv = ip6_mc_source(add, omode, sk, &greqs); | |
749 | break; | |
750 | } | |
751 | case MCAST_MSFILTER: | |
752 | { | |
1da177e4 LT |
753 | struct group_filter *gsf; |
754 | ||
755 | if (optlen < GROUP_FILTER_SIZE(0)) | |
756 | goto e_inval; | |
757 | if (optlen > sysctl_optmem_max) { | |
758 | retv = -ENOBUFS; | |
759 | break; | |
760 | } | |
43727da9 AV |
761 | gsf = memdup_user(optval, optlen); |
762 | if (IS_ERR(gsf)) { | |
763 | retv = PTR_ERR(gsf); | |
1da177e4 LT |
764 | break; |
765 | } | |
766 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ | |
767 | if (gsf->gf_numsrc >= 0x1ffffffU || | |
768 | gsf->gf_numsrc > sysctl_mld_max_msf) { | |
769 | kfree(gsf); | |
770 | retv = -ENOBUFS; | |
771 | break; | |
772 | } | |
773 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { | |
774 | kfree(gsf); | |
775 | retv = -EINVAL; | |
776 | break; | |
777 | } | |
778 | retv = ip6_mc_msfilter(sk, gsf); | |
779 | kfree(gsf); | |
780 | ||
781 | break; | |
782 | } | |
783 | case IPV6_ROUTER_ALERT: | |
b2a9d7c2 YH |
784 | if (optlen < sizeof(int)) |
785 | goto e_inval; | |
725a8ff0 | 786 | retv = ip6_ra_control(sk, val); |
1da177e4 | 787 | break; |
9036b2fe FR |
788 | case IPV6_ROUTER_ALERT_ISOLATE: |
789 | if (optlen < sizeof(int)) | |
790 | goto e_inval; | |
791 | np->rtalert_isolate = valbool; | |
792 | retv = 0; | |
793 | break; | |
1da177e4 | 794 | case IPV6_MTU_DISCOVER: |
b2a9d7c2 YH |
795 | if (optlen < sizeof(int)) |
796 | goto e_inval; | |
0b95227a | 797 | if (val < IPV6_PMTUDISC_DONT || val > IPV6_PMTUDISC_OMIT) |
1da177e4 LT |
798 | goto e_inval; |
799 | np->pmtudisc = val; | |
800 | retv = 0; | |
801 | break; | |
802 | case IPV6_MTU: | |
b2a9d7c2 YH |
803 | if (optlen < sizeof(int)) |
804 | goto e_inval; | |
1da177e4 LT |
805 | if (val && val < IPV6_MIN_MTU) |
806 | goto e_inval; | |
807 | np->frag_size = val; | |
808 | retv = 0; | |
809 | break; | |
810 | case IPV6_RECVERR: | |
b2a9d7c2 YH |
811 | if (optlen < sizeof(int)) |
812 | goto e_inval; | |
1da177e4 LT |
813 | np->recverr = valbool; |
814 | if (!val) | |
815 | skb_queue_purge(&sk->sk_error_queue); | |
816 | retv = 0; | |
817 | break; | |
818 | case IPV6_FLOWINFO_SEND: | |
b2a9d7c2 YH |
819 | if (optlen < sizeof(int)) |
820 | goto e_inval; | |
1da177e4 LT |
821 | np->sndflow = valbool; |
822 | retv = 0; | |
823 | break; | |
824 | case IPV6_FLOWLABEL_MGR: | |
825 | retv = ipv6_flowlabel_opt(sk, optval, optlen); | |
826 | break; | |
827 | case IPV6_IPSEC_POLICY: | |
828 | case IPV6_XFRM_POLICY: | |
6fc0b4a7 | 829 | retv = -EPERM; |
af31f412 | 830 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
6fc0b4a7 | 831 | break; |
1da177e4 LT |
832 | retv = xfrm_user_policy(sk, optname, optval, optlen); |
833 | break; | |
834 | ||
7cbca67c YH |
835 | case IPV6_ADDR_PREFERENCES: |
836 | { | |
837 | unsigned int pref = 0; | |
838 | unsigned int prefmask = ~0; | |
839 | ||
b2a9d7c2 YH |
840 | if (optlen < sizeof(int)) |
841 | goto e_inval; | |
842 | ||
7cbca67c YH |
843 | retv = -EINVAL; |
844 | ||
845 | /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ | |
846 | switch (val & (IPV6_PREFER_SRC_PUBLIC| | |
847 | IPV6_PREFER_SRC_TMP| | |
848 | IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { | |
849 | case IPV6_PREFER_SRC_PUBLIC: | |
850 | pref |= IPV6_PREFER_SRC_PUBLIC; | |
851 | break; | |
852 | case IPV6_PREFER_SRC_TMP: | |
853 | pref |= IPV6_PREFER_SRC_TMP; | |
854 | break; | |
855 | case IPV6_PREFER_SRC_PUBTMP_DEFAULT: | |
856 | break; | |
857 | case 0: | |
858 | goto pref_skip_pubtmp; | |
859 | default: | |
860 | goto e_inval; | |
861 | } | |
862 | ||
863 | prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| | |
864 | IPV6_PREFER_SRC_TMP); | |
865 | pref_skip_pubtmp: | |
866 | ||
867 | /* check HOME/COA conflicts */ | |
868 | switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { | |
869 | case IPV6_PREFER_SRC_HOME: | |
870 | break; | |
871 | case IPV6_PREFER_SRC_COA: | |
872 | pref |= IPV6_PREFER_SRC_COA; | |
873 | case 0: | |
874 | goto pref_skip_coa; | |
875 | default: | |
876 | goto e_inval; | |
877 | } | |
878 | ||
879 | prefmask &= ~IPV6_PREFER_SRC_COA; | |
880 | pref_skip_coa: | |
881 | ||
882 | /* check CGA/NONCGA conflicts */ | |
883 | switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { | |
884 | case IPV6_PREFER_SRC_CGA: | |
885 | case IPV6_PREFER_SRC_NONCGA: | |
886 | case 0: | |
887 | break; | |
888 | default: | |
889 | goto e_inval; | |
890 | } | |
891 | ||
892 | np->srcprefs = (np->srcprefs & prefmask) | pref; | |
893 | retv = 0; | |
894 | ||
895 | break; | |
896 | } | |
e802af9c SH |
897 | case IPV6_MINHOPCOUNT: |
898 | if (optlen < sizeof(int)) | |
899 | goto e_inval; | |
900 | if (val < 0 || val > 255) | |
901 | goto e_inval; | |
902 | np->min_hopcount = val; | |
d4596bad | 903 | retv = 0; |
793b1473 BH |
904 | break; |
905 | case IPV6_DONTFRAG: | |
906 | np->dontfrag = valbool; | |
e802af9c SH |
907 | retv = 0; |
908 | break; | |
cb1ce2ef TH |
909 | case IPV6_AUTOFLOWLABEL: |
910 | np->autoflowlabel = valbool; | |
513674b5 | 911 | np->autoflowlabel_set = 1; |
cb1ce2ef TH |
912 | retv = 0; |
913 | break; | |
0cc0aa61 WB |
914 | case IPV6_RECVFRAGSIZE: |
915 | np->rxopt.bits.recvfragsize = valbool; | |
916 | retv = 0; | |
917 | break; | |
1da177e4 | 918 | } |
7cbca67c | 919 | |
1da177e4 | 920 | release_sock(sk); |
baf606d9 MRL |
921 | if (needs_rtnl) |
922 | rtnl_unlock(); | |
1da177e4 | 923 | |
1da177e4 LT |
924 | return retv; |
925 | ||
926 | e_inval: | |
927 | release_sock(sk); | |
baf606d9 MRL |
928 | if (needs_rtnl) |
929 | rtnl_unlock(); | |
1da177e4 LT |
930 | return -EINVAL; |
931 | } | |
932 | ||
3fdadf7d | 933 | int ipv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 934 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
935 | { |
936 | int err; | |
937 | ||
938 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
939 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
940 | ||
941 | if (level != SOL_IPV6) | |
942 | return -ENOPROTOOPT; | |
943 | ||
944 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); | |
945 | #ifdef CONFIG_NETFILTER | |
946 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
947 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
3f34cfae PA |
948 | optname != IPV6_XFRM_POLICY) |
949 | err = nf_setsockopt(sk, PF_INET6, optname, optval, optlen); | |
3fdadf7d DM |
950 | #endif |
951 | return err; | |
952 | } | |
7159039a | 953 | EXPORT_SYMBOL(ipv6_setsockopt); |
3fdadf7d DM |
954 | |
955 | #ifdef CONFIG_COMPAT | |
956 | int compat_ipv6_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 957 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
958 | { |
959 | int err; | |
960 | ||
961 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
962 | if (udp_prot.compat_setsockopt != NULL) |
963 | return udp_prot.compat_setsockopt(sk, level, optname, | |
964 | optval, optlen); | |
965 | return udp_prot.setsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
966 | } |
967 | ||
968 | if (level != SOL_IPV6) | |
969 | return -ENOPROTOOPT; | |
970 | ||
dae50295 DS |
971 | if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER) |
972 | return compat_mc_setsockopt(sk, level, optname, optval, optlen, | |
973 | ipv6_setsockopt); | |
974 | ||
3fdadf7d DM |
975 | err = do_ipv6_setsockopt(sk, level, optname, optval, optlen); |
976 | #ifdef CONFIG_NETFILTER | |
977 | /* we need to exclude all possible ENOPROTOOPTs except default case */ | |
978 | if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY && | |
3f34cfae PA |
979 | optname != IPV6_XFRM_POLICY) |
980 | err = compat_nf_setsockopt(sk, PF_INET6, optname, optval, | |
981 | optlen); | |
3fdadf7d DM |
982 | #endif |
983 | return err; | |
984 | } | |
543d9cfe | 985 | EXPORT_SYMBOL(compat_ipv6_setsockopt); |
3fdadf7d DM |
986 | #endif |
987 | ||
28693079 | 988 | static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, |
4c6510a7 | 989 | int optname, char __user *optval, int len) |
333fad53 | 990 | { |
28693079 DM |
991 | struct ipv6_opt_hdr *hdr; |
992 | ||
4c6510a7 YH |
993 | if (!opt) |
994 | return 0; | |
995 | ||
67ba4152 | 996 | switch (optname) { |
4c6510a7 YH |
997 | case IPV6_HOPOPTS: |
998 | hdr = opt->hopopt; | |
999 | break; | |
1000 | case IPV6_RTHDRDSTOPTS: | |
1001 | hdr = opt->dst0opt; | |
1002 | break; | |
1003 | case IPV6_RTHDR: | |
1004 | hdr = (struct ipv6_opt_hdr *)opt->srcrt; | |
1005 | break; | |
1006 | case IPV6_DSTOPTS: | |
1007 | hdr = opt->dst1opt; | |
1008 | break; | |
1009 | default: | |
1010 | return -EINVAL; /* should not happen */ | |
1011 | } | |
1012 | ||
1013 | if (!hdr) | |
333fad53 | 1014 | return 0; |
28693079 | 1015 | |
d2b02ed9 | 1016 | len = min_t(unsigned int, len, ipv6_optlen(hdr)); |
660adc6e | 1017 | if (copy_to_user(optval, hdr, len)) |
333fad53 | 1018 | return -EFAULT; |
95b496b6 | 1019 | return len; |
333fad53 YH |
1020 | } |
1021 | ||
3fdadf7d | 1022 | static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, |
95c96174 | 1023 | char __user *optval, int __user *optlen, unsigned int flags) |
1da177e4 LT |
1024 | { |
1025 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1026 | int len; | |
1027 | int val; | |
1028 | ||
7bc570c8 YH |
1029 | if (ip6_mroute_opt(optname)) |
1030 | return ip6_mroute_getsockopt(sk, optname, optval, optlen); | |
1031 | ||
1da177e4 LT |
1032 | if (get_user(len, optlen)) |
1033 | return -EFAULT; | |
1034 | switch (optname) { | |
1035 | case IPV6_ADDRFORM: | |
1036 | if (sk->sk_protocol != IPPROTO_UDP && | |
ba4e58ec | 1037 | sk->sk_protocol != IPPROTO_UDPLITE && |
1da177e4 | 1038 | sk->sk_protocol != IPPROTO_TCP) |
1717699c | 1039 | return -ENOPROTOOPT; |
1da177e4 LT |
1040 | if (sk->sk_state != TCP_ESTABLISHED) |
1041 | return -ENOTCONN; | |
1042 | val = sk->sk_family; | |
1043 | break; | |
1044 | case MCAST_MSFILTER: | |
1045 | { | |
1046 | struct group_filter gsf; | |
1047 | int err; | |
1048 | ||
1049 | if (len < GROUP_FILTER_SIZE(0)) | |
1050 | return -EINVAL; | |
1051 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) | |
1052 | return -EFAULT; | |
20c61fbd YH |
1053 | if (gsf.gf_group.ss_family != AF_INET6) |
1054 | return -EADDRNOTAVAIL; | |
1da177e4 LT |
1055 | lock_sock(sk); |
1056 | err = ip6_mc_msfget(sk, &gsf, | |
1057 | (struct group_filter __user *)optval, optlen); | |
1058 | release_sock(sk); | |
1059 | return err; | |
1060 | } | |
1061 | ||
333fad53 | 1062 | case IPV6_2292PKTOPTIONS: |
1da177e4 LT |
1063 | { |
1064 | struct msghdr msg; | |
1065 | struct sk_buff *skb; | |
1066 | ||
1067 | if (sk->sk_type != SOCK_STREAM) | |
1068 | return -ENOPROTOOPT; | |
1069 | ||
1070 | msg.msg_control = optval; | |
1071 | msg.msg_controllen = len; | |
98e77438 | 1072 | msg.msg_flags = flags; |
1da177e4 LT |
1073 | |
1074 | lock_sock(sk); | |
1075 | skb = np->pktoptions; | |
1076 | if (skb) | |
4b261c75 | 1077 | ip6_datagram_recv_ctl(sk, &msg, skb); |
1dc7b90f ED |
1078 | release_sock(sk); |
1079 | if (!skb) { | |
1da177e4 LT |
1080 | if (np->rxopt.bits.rxinfo) { |
1081 | struct in6_pktinfo src_info; | |
f250dcda YH |
1082 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1083 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f | 1084 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : np->sticky_pktinfo.ipi6_addr; |
1da177e4 LT |
1085 | put_cmsg(&msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
1086 | } | |
1087 | if (np->rxopt.bits.rxhlim) { | |
1088 | int hlim = np->mcast_hops; | |
1089 | put_cmsg(&msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); | |
1090 | } | |
4c507d28 | 1091 | if (np->rxopt.bits.rxtclass) { |
d76ed22b LR |
1092 | int tclass = (int)ip6_tclass(np->rcv_flowinfo); |
1093 | ||
4c507d28 JB |
1094 | put_cmsg(&msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
1095 | } | |
333fad53 YH |
1096 | if (np->rxopt.bits.rxoinfo) { |
1097 | struct in6_pktinfo src_info; | |
f250dcda YH |
1098 | src_info.ipi6_ifindex = np->mcast_oif ? np->mcast_oif : |
1099 | np->sticky_pktinfo.ipi6_ifindex; | |
efe4208f ED |
1100 | src_info.ipi6_addr = np->mcast_oif ? sk->sk_v6_daddr : |
1101 | np->sticky_pktinfo.ipi6_addr; | |
333fad53 YH |
1102 | put_cmsg(&msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
1103 | } | |
1104 | if (np->rxopt.bits.rxohlim) { | |
1105 | int hlim = np->mcast_hops; | |
1106 | put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); | |
1107 | } | |
1397ed35 | 1108 | if (np->rxopt.bits.rxflow) { |
68536053 FF |
1109 | __be32 flowinfo = np->rcv_flowinfo; |
1110 | ||
1397ed35 FF |
1111 | put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
1112 | } | |
1da177e4 LT |
1113 | } |
1114 | len -= msg.msg_controllen; | |
1115 | return put_user(len, optlen); | |
1116 | } | |
1117 | case IPV6_MTU: | |
1118 | { | |
1119 | struct dst_entry *dst; | |
b6c6712a | 1120 | |
1ab1457c | 1121 | val = 0; |
b6c6712a ED |
1122 | rcu_read_lock(); |
1123 | dst = __sk_dst_get(sk); | |
1124 | if (dst) | |
1da177e4 | 1125 | val = dst_mtu(dst); |
b6c6712a | 1126 | rcu_read_unlock(); |
1da177e4 LT |
1127 | if (!val) |
1128 | return -ENOTCONN; | |
1129 | break; | |
1130 | } | |
1131 | ||
1132 | case IPV6_V6ONLY: | |
9fe516ba | 1133 | val = sk->sk_ipv6only; |
1da177e4 LT |
1134 | break; |
1135 | ||
333fad53 | 1136 | case IPV6_RECVPKTINFO: |
1da177e4 LT |
1137 | val = np->rxopt.bits.rxinfo; |
1138 | break; | |
1139 | ||
333fad53 YH |
1140 | case IPV6_2292PKTINFO: |
1141 | val = np->rxopt.bits.rxoinfo; | |
1142 | break; | |
1143 | ||
1144 | case IPV6_RECVHOPLIMIT: | |
1da177e4 LT |
1145 | val = np->rxopt.bits.rxhlim; |
1146 | break; | |
1147 | ||
333fad53 YH |
1148 | case IPV6_2292HOPLIMIT: |
1149 | val = np->rxopt.bits.rxohlim; | |
1150 | break; | |
1151 | ||
1152 | case IPV6_RECVRTHDR: | |
1da177e4 LT |
1153 | val = np->rxopt.bits.srcrt; |
1154 | break; | |
1155 | ||
333fad53 YH |
1156 | case IPV6_2292RTHDR: |
1157 | val = np->rxopt.bits.osrcrt; | |
1158 | break; | |
1159 | ||
1da177e4 | 1160 | case IPV6_HOPOPTS: |
333fad53 YH |
1161 | case IPV6_RTHDRDSTOPTS: |
1162 | case IPV6_RTHDR: | |
1163 | case IPV6_DSTOPTS: | |
1164 | { | |
45f6fad8 | 1165 | struct ipv6_txoptions *opt; |
333fad53 YH |
1166 | |
1167 | lock_sock(sk); | |
1e1d04e6 HFS |
1168 | opt = rcu_dereference_protected(np->opt, |
1169 | lockdep_sock_is_held(sk)); | |
45f6fad8 | 1170 | len = ipv6_getsockopt_sticky(sk, opt, optname, optval, len); |
333fad53 | 1171 | release_sock(sk); |
05335c22 YH |
1172 | /* check if ipv6_getsockopt_sticky() returns err code */ |
1173 | if (len < 0) | |
1174 | return len; | |
333fad53 YH |
1175 | return put_user(len, optlen); |
1176 | } | |
1177 | ||
1178 | case IPV6_RECVHOPOPTS: | |
1da177e4 LT |
1179 | val = np->rxopt.bits.hopopts; |
1180 | break; | |
1181 | ||
333fad53 YH |
1182 | case IPV6_2292HOPOPTS: |
1183 | val = np->rxopt.bits.ohopopts; | |
1184 | break; | |
1185 | ||
1186 | case IPV6_RECVDSTOPTS: | |
1da177e4 LT |
1187 | val = np->rxopt.bits.dstopts; |
1188 | break; | |
1189 | ||
333fad53 YH |
1190 | case IPV6_2292DSTOPTS: |
1191 | val = np->rxopt.bits.odstopts; | |
1192 | break; | |
1193 | ||
41a1f8ea YH |
1194 | case IPV6_TCLASS: |
1195 | val = np->tclass; | |
1196 | break; | |
1197 | ||
1198 | case IPV6_RECVTCLASS: | |
1199 | val = np->rxopt.bits.rxtclass; | |
1200 | break; | |
1201 | ||
1da177e4 LT |
1202 | case IPV6_FLOWINFO: |
1203 | val = np->rxopt.bits.rxflow; | |
1204 | break; | |
1205 | ||
793b1473 BH |
1206 | case IPV6_RECVPATHMTU: |
1207 | val = np->rxopt.bits.rxpmtu; | |
1208 | break; | |
1209 | ||
1210 | case IPV6_PATHMTU: | |
1211 | { | |
1212 | struct dst_entry *dst; | |
1213 | struct ip6_mtuinfo mtuinfo; | |
1214 | ||
1215 | if (len < sizeof(mtuinfo)) | |
1216 | return -EINVAL; | |
1217 | ||
1218 | len = sizeof(mtuinfo); | |
1219 | memset(&mtuinfo, 0, sizeof(mtuinfo)); | |
1220 | ||
1221 | rcu_read_lock(); | |
1222 | dst = __sk_dst_get(sk); | |
1223 | if (dst) | |
1224 | mtuinfo.ip6m_mtu = dst_mtu(dst); | |
1225 | rcu_read_unlock(); | |
1226 | if (!mtuinfo.ip6m_mtu) | |
1227 | return -ENOTCONN; | |
1228 | ||
1229 | if (put_user(len, optlen)) | |
1230 | return -EFAULT; | |
1231 | if (copy_to_user(optval, &mtuinfo, len)) | |
1232 | return -EFAULT; | |
1233 | ||
1234 | return 0; | |
793b1473 BH |
1235 | } |
1236 | ||
6c468622 BS |
1237 | case IPV6_TRANSPARENT: |
1238 | val = inet_sk(sk)->transparent; | |
1239 | break; | |
1240 | ||
84e14fe3 MŻ |
1241 | case IPV6_FREEBIND: |
1242 | val = inet_sk(sk)->freebind; | |
1243 | break; | |
1244 | ||
6c468622 BS |
1245 | case IPV6_RECVORIGDSTADDR: |
1246 | val = np->rxopt.bits.rxorigdstaddr; | |
1247 | break; | |
1248 | ||
1da177e4 | 1249 | case IPV6_UNICAST_HOPS: |
1da177e4 | 1250 | case IPV6_MULTICAST_HOPS: |
befffe90 BH |
1251 | { |
1252 | struct dst_entry *dst; | |
1253 | ||
1254 | if (optname == IPV6_UNICAST_HOPS) | |
1255 | val = np->hop_limit; | |
1256 | else | |
1257 | val = np->mcast_hops; | |
1258 | ||
b6c6712a ED |
1259 | if (val < 0) { |
1260 | rcu_read_lock(); | |
1261 | dst = __sk_dst_get(sk); | |
1262 | if (dst) | |
6b75d090 | 1263 | val = ip6_dst_hoplimit(dst); |
b6c6712a | 1264 | rcu_read_unlock(); |
befffe90 | 1265 | } |
b6c6712a | 1266 | |
befffe90 | 1267 | if (val < 0) |
53b7997f | 1268 | val = sock_net(sk)->ipv6.devconf_all->hop_limit; |
1da177e4 | 1269 | break; |
befffe90 | 1270 | } |
1da177e4 LT |
1271 | |
1272 | case IPV6_MULTICAST_LOOP: | |
1273 | val = np->mc_loop; | |
1274 | break; | |
1275 | ||
1276 | case IPV6_MULTICAST_IF: | |
1277 | val = np->mcast_oif; | |
1278 | break; | |
1279 | ||
15033f04 AN |
1280 | case IPV6_MULTICAST_ALL: |
1281 | val = np->mc_all; | |
1282 | break; | |
1283 | ||
c4062dfc EH |
1284 | case IPV6_UNICAST_IF: |
1285 | val = (__force int)htonl((__u32) np->ucast_oif); | |
1286 | break; | |
1287 | ||
1da177e4 LT |
1288 | case IPV6_MTU_DISCOVER: |
1289 | val = np->pmtudisc; | |
1290 | break; | |
1291 | ||
1292 | case IPV6_RECVERR: | |
1293 | val = np->recverr; | |
1294 | break; | |
1295 | ||
1296 | case IPV6_FLOWINFO_SEND: | |
1297 | val = np->sndflow; | |
1298 | break; | |
1299 | ||
3fdfa5ff FF |
1300 | case IPV6_FLOWLABEL_MGR: |
1301 | { | |
1302 | struct in6_flowlabel_req freq; | |
46e5f401 | 1303 | int flags; |
3fdfa5ff FF |
1304 | |
1305 | if (len < sizeof(freq)) | |
1306 | return -EINVAL; | |
1307 | ||
1308 | if (copy_from_user(&freq, optval, sizeof(freq))) | |
1309 | return -EFAULT; | |
1310 | ||
1311 | if (freq.flr_action != IPV6_FL_A_GET) | |
1312 | return -EINVAL; | |
1313 | ||
1314 | len = sizeof(freq); | |
46e5f401 FF |
1315 | flags = freq.flr_flags; |
1316 | ||
3fdfa5ff FF |
1317 | memset(&freq, 0, sizeof(freq)); |
1318 | ||
46e5f401 | 1319 | val = ipv6_flowlabel_opt_get(sk, &freq, flags); |
3fdfa5ff FF |
1320 | if (val < 0) |
1321 | return val; | |
1322 | ||
1323 | if (put_user(len, optlen)) | |
1324 | return -EFAULT; | |
1325 | if (copy_to_user(optval, &freq, len)) | |
1326 | return -EFAULT; | |
1327 | ||
1328 | return 0; | |
1329 | } | |
1330 | ||
7cbca67c YH |
1331 | case IPV6_ADDR_PREFERENCES: |
1332 | val = 0; | |
1333 | ||
1334 | if (np->srcprefs & IPV6_PREFER_SRC_TMP) | |
1335 | val |= IPV6_PREFER_SRC_TMP; | |
1336 | else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) | |
1337 | val |= IPV6_PREFER_SRC_PUBLIC; | |
1338 | else { | |
1339 | /* XXX: should we return system default? */ | |
1340 | val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; | |
1341 | } | |
1342 | ||
1343 | if (np->srcprefs & IPV6_PREFER_SRC_COA) | |
1344 | val |= IPV6_PREFER_SRC_COA; | |
1345 | else | |
1346 | val |= IPV6_PREFER_SRC_HOME; | |
1347 | break; | |
e802af9c SH |
1348 | |
1349 | case IPV6_MINHOPCOUNT: | |
1350 | val = np->min_hopcount; | |
1351 | break; | |
793b1473 BH |
1352 | |
1353 | case IPV6_DONTFRAG: | |
1354 | val = np->dontfrag; | |
1355 | break; | |
7cbca67c | 1356 | |
cb1ce2ef | 1357 | case IPV6_AUTOFLOWLABEL: |
e9191ffb | 1358 | val = ip6_autoflowlabel(sock_net(sk), np); |
cb1ce2ef TH |
1359 | break; |
1360 | ||
0cc0aa61 WB |
1361 | case IPV6_RECVFRAGSIZE: |
1362 | val = np->rxopt.bits.recvfragsize; | |
1363 | break; | |
1364 | ||
9036b2fe FR |
1365 | case IPV6_ROUTER_ALERT_ISOLATE: |
1366 | val = np->rtalert_isolate; | |
1367 | break; | |
1368 | ||
1da177e4 | 1369 | default: |
cf6fc4a9 | 1370 | return -ENOPROTOOPT; |
1da177e4 LT |
1371 | } |
1372 | len = min_t(unsigned int, sizeof(int), len); | |
67ba4152 | 1373 | if (put_user(len, optlen)) |
1da177e4 | 1374 | return -EFAULT; |
67ba4152 | 1375 | if (copy_to_user(optval, &val, len)) |
1da177e4 LT |
1376 | return -EFAULT; |
1377 | return 0; | |
1378 | } | |
1379 | ||
3fdadf7d DM |
1380 | int ipv6_getsockopt(struct sock *sk, int level, int optname, |
1381 | char __user *optval, int __user *optlen) | |
1382 | { | |
1383 | int err; | |
1384 | ||
1385 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) | |
1386 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
1387 | ||
67ba4152 | 1388 | if (level != SOL_IPV6) |
3fdadf7d DM |
1389 | return -ENOPROTOOPT; |
1390 | ||
98e77438 | 1391 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0); |
3fdadf7d | 1392 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1393 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1394 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1395 | int len; |
1396 | ||
1397 | if (get_user(len, optlen)) | |
1398 | return -EFAULT; | |
1399 | ||
01ea306f | 1400 | err = nf_getsockopt(sk, PF_INET6, optname, optval, &len); |
3fdadf7d DM |
1401 | if (err >= 0) |
1402 | err = put_user(len, optlen); | |
1403 | } | |
1404 | #endif | |
1405 | return err; | |
1406 | } | |
7159039a YH |
1407 | EXPORT_SYMBOL(ipv6_getsockopt); |
1408 | ||
3fdadf7d DM |
1409 | #ifdef CONFIG_COMPAT |
1410 | int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 1411 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
1412 | { |
1413 | int err; | |
1414 | ||
1415 | if (level == SOL_IP && sk->sk_type != SOCK_RAW) { | |
543d9cfe ACM |
1416 | if (udp_prot.compat_getsockopt != NULL) |
1417 | return udp_prot.compat_getsockopt(sk, level, optname, | |
1418 | optval, optlen); | |
1419 | return udp_prot.getsockopt(sk, level, optname, optval, optlen); | |
3fdadf7d DM |
1420 | } |
1421 | ||
543d9cfe | 1422 | if (level != SOL_IPV6) |
3fdadf7d DM |
1423 | return -ENOPROTOOPT; |
1424 | ||
80991790 PE |
1425 | if (optname == MCAST_MSFILTER) |
1426 | return compat_mc_getsockopt(sk, level, optname, optval, optlen, | |
1427 | ipv6_getsockopt); | |
1428 | ||
98e77438 DB |
1429 | err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, |
1430 | MSG_CMSG_COMPAT); | |
3fdadf7d | 1431 | #ifdef CONFIG_NETFILTER |
cf6fc4a9 WY |
1432 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
1433 | if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) { | |
3fdadf7d DM |
1434 | int len; |
1435 | ||
1436 | if (get_user(len, optlen)) | |
1437 | return -EFAULT; | |
1438 | ||
01ea306f | 1439 | err = compat_nf_getsockopt(sk, PF_INET6, optname, optval, &len); |
3fdadf7d DM |
1440 | if (err >= 0) |
1441 | err = put_user(len, optlen); | |
1442 | } | |
1443 | #endif | |
1444 | return err; | |
1445 | } | |
543d9cfe | 1446 | EXPORT_SYMBOL(compat_ipv6_getsockopt); |
3fdadf7d | 1447 | #endif |