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21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/socket.h>
24#include <linux/slab.h>
25#include <linux/sockios.h>
26#include <linux/net.h>
27#include <linux/in6.h>
28#include <linux/netdevice.h>
29#include <linux/if_arp.h>
30#include <linux/icmpv6.h>
31#include <linux/netfilter.h>
32#include <linux/netfilter_ipv6.h>
33#include <linux/skbuff.h>
34#include <linux/compat.h>
35#include <linux/uaccess.h>
36#include <asm/ioctls.h>
37
38#include <net/net_namespace.h>
39#include <net/ip.h>
40#include <net/sock.h>
41#include <net/snmp.h>
42
43#include <net/ipv6.h>
44#include <net/ndisc.h>
45#include <net/protocol.h>
46#include <net/ip6_route.h>
47#include <net/ip6_checksum.h>
48#include <net/addrconf.h>
49#include <net/transp_v6.h>
50#include <net/udp.h>
51#include <net/inet_common.h>
52#include <net/tcp_states.h>
53#if IS_ENABLED(CONFIG_IPV6_MIP6)
54#include <net/mip6.h>
55#endif
56#include <linux/mroute6.h>
57
58#include <net/raw.h>
59#include <net/rawv6.h>
60#include <net/xfrm.h>
61
62#include <linux/proc_fs.h>
63#include <linux/seq_file.h>
64#include <linux/export.h>
65
66#define ICMPV6_HDRLEN 4
67
68struct raw_hashinfo raw_v6_hashinfo = {
69 .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
70};
71EXPORT_SYMBOL_GPL(raw_v6_hashinfo);
72
73struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
74 unsigned short num, const struct in6_addr *loc_addr,
75 const struct in6_addr *rmt_addr, int dif, int sdif)
76{
77 bool is_multicast = ipv6_addr_is_multicast(loc_addr);
78
79 sk_for_each_from(sk)
80 if (inet_sk(sk)->inet_num == num) {
81
82 if (!net_eq(sock_net(sk), net))
83 continue;
84
85 if (!ipv6_addr_any(&sk->sk_v6_daddr) &&
86 !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr))
87 continue;
88
89 if (sk->sk_bound_dev_if &&
90 sk->sk_bound_dev_if != dif &&
91 sk->sk_bound_dev_if != sdif)
92 continue;
93
94 if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
95 if (ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))
96 goto found;
97 if (is_multicast &&
98 inet6_mc_check(sk, loc_addr, rmt_addr))
99 goto found;
100 continue;
101 }
102 goto found;
103 }
104 sk = NULL;
105found:
106 return sk;
107}
108EXPORT_SYMBOL_GPL(__raw_v6_lookup);
109
110
111
112
113
114static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
115{
116 struct icmp6hdr _hdr;
117 const struct icmp6hdr *hdr;
118
119
120
121
122 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
123 ICMPV6_HDRLEN, &_hdr);
124 if (hdr) {
125 const __u32 *data = &raw6_sk(sk)->filter.data[0];
126 unsigned int type = hdr->icmp6_type;
127
128 return (data[type >> 5] & (1U << (type & 31))) != 0;
129 }
130 return 1;
131}
132
133#if IS_ENABLED(CONFIG_IPV6_MIP6)
134typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
135
136static mh_filter_t __rcu *mh_filter __read_mostly;
137
138int rawv6_mh_filter_register(mh_filter_t filter)
139{
140 rcu_assign_pointer(mh_filter, filter);
141 return 0;
142}
143EXPORT_SYMBOL(rawv6_mh_filter_register);
144
145int rawv6_mh_filter_unregister(mh_filter_t filter)
146{
147 RCU_INIT_POINTER(mh_filter, NULL);
148 synchronize_rcu();
149 return 0;
150}
151EXPORT_SYMBOL(rawv6_mh_filter_unregister);
152
153#endif
154
155
156
157
158
159
160
161
162static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
163{
164 const struct in6_addr *saddr;
165 const struct in6_addr *daddr;
166 struct sock *sk;
167 bool delivered = false;
168 __u8 hash;
169 struct net *net;
170
171 saddr = &ipv6_hdr(skb)->saddr;
172 daddr = saddr + 1;
173
174 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
175
176 read_lock(&raw_v6_hashinfo.lock);
177 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
178
179 if (!sk)
180 goto out;
181
182 net = dev_net(skb->dev);
183 sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr,
184 inet6_iif(skb), inet6_sdif(skb));
185
186 while (sk) {
187 int filtered;
188
189 delivered = true;
190 switch (nexthdr) {
191 case IPPROTO_ICMPV6:
192 filtered = icmpv6_filter(sk, skb);
193 break;
194
195#if IS_ENABLED(CONFIG_IPV6_MIP6)
196 case IPPROTO_MH:
197 {
198
199
200
201
202
203
204 mh_filter_t *filter;
205
206 filter = rcu_dereference(mh_filter);
207 filtered = filter ? (*filter)(sk, skb) : 0;
208 break;
209 }
210#endif
211 default:
212 filtered = 0;
213 break;
214 }
215
216 if (filtered < 0)
217 break;
218 if (filtered == 0) {
219 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
220
221
222 if (clone) {
223 nf_reset(clone);
224 rawv6_rcv(sk, clone);
225 }
226 }
227 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
228 inet6_iif(skb), inet6_sdif(skb));
229 }
230out:
231 read_unlock(&raw_v6_hashinfo.lock);
232 return delivered;
233}
234
235bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
236{
237 struct sock *raw_sk;
238
239 raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]);
240 if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
241 raw_sk = NULL;
242
243 return raw_sk != NULL;
244}
245
246
247static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
248{
249 struct inet_sock *inet = inet_sk(sk);
250 struct ipv6_pinfo *np = inet6_sk(sk);
251 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
252 __be32 v4addr = 0;
253 int addr_type;
254 int err;
255
256 if (addr_len < SIN6_LEN_RFC2133)
257 return -EINVAL;
258
259 if (addr->sin6_family != AF_INET6)
260 return -EINVAL;
261
262 addr_type = ipv6_addr_type(&addr->sin6_addr);
263
264
265 if (addr_type == IPV6_ADDR_MAPPED)
266 return -EADDRNOTAVAIL;
267
268 lock_sock(sk);
269
270 err = -EINVAL;
271 if (sk->sk_state != TCP_CLOSE)
272 goto out;
273
274 rcu_read_lock();
275
276 if (addr_type != IPV6_ADDR_ANY) {
277 struct net_device *dev = NULL;
278
279 if (__ipv6_addr_needs_scope_id(addr_type)) {
280 if (addr_len >= sizeof(struct sockaddr_in6) &&
281 addr->sin6_scope_id) {
282
283
284
285 sk->sk_bound_dev_if = addr->sin6_scope_id;
286 }
287
288
289 if (!sk->sk_bound_dev_if)
290 goto out_unlock;
291
292 err = -ENODEV;
293 dev = dev_get_by_index_rcu(sock_net(sk),
294 sk->sk_bound_dev_if);
295 if (!dev)
296 goto out_unlock;
297 }
298
299
300
301
302 v4addr = LOOPBACK4_IPV6;
303 if (!(addr_type & IPV6_ADDR_MULTICAST) &&
304 !sock_net(sk)->ipv6.sysctl.ip_nonlocal_bind) {
305 err = -EADDRNOTAVAIL;
306 if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
307 dev, 0)) {
308 goto out_unlock;
309 }
310 }
311 }
312
313 inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
314 sk->sk_v6_rcv_saddr = addr->sin6_addr;
315 if (!(addr_type & IPV6_ADDR_MULTICAST))
316 np->saddr = addr->sin6_addr;
317 err = 0;
318out_unlock:
319 rcu_read_unlock();
320out:
321 release_sock(sk);
322 return err;
323}
324
325static void rawv6_err(struct sock *sk, struct sk_buff *skb,
326 struct inet6_skb_parm *opt,
327 u8 type, u8 code, int offset, __be32 info)
328{
329 struct inet_sock *inet = inet_sk(sk);
330 struct ipv6_pinfo *np = inet6_sk(sk);
331 int err;
332 int harderr;
333
334
335
336
337
338
339 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
340 return;
341
342 harderr = icmpv6_err_convert(type, code, &err);
343 if (type == ICMPV6_PKT_TOOBIG) {
344 ip6_sk_update_pmtu(skb, sk, info);
345 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
346 }
347 if (type == NDISC_REDIRECT) {
348 ip6_sk_redirect(skb, sk);
349 return;
350 }
351 if (np->recverr) {
352 u8 *payload = skb->data;
353 if (!inet->hdrincl)
354 payload += offset;
355 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
356 }
357
358 if (np->recverr || harderr) {
359 sk->sk_err = err;
360 sk->sk_error_report(sk);
361 }
362}
363
364void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
365 u8 type, u8 code, int inner_offset, __be32 info)
366{
367 struct sock *sk;
368 int hash;
369 const struct in6_addr *saddr, *daddr;
370 struct net *net;
371
372 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
373
374 read_lock(&raw_v6_hashinfo.lock);
375 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
376 if (sk) {
377
378 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
379 saddr = &ip6h->saddr;
380 daddr = &ip6h->daddr;
381 net = dev_net(skb->dev);
382
383 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
384 inet6_iif(skb), inet6_iif(skb)))) {
385 rawv6_err(sk, skb, NULL, type, code,
386 inner_offset, info);
387 sk = sk_next(sk);
388 }
389 }
390 read_unlock(&raw_v6_hashinfo.lock);
391}
392
393static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
394{
395 if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
396 skb_checksum_complete(skb)) {
397 atomic_inc(&sk->sk_drops);
398 kfree_skb(skb);
399 return NET_RX_DROP;
400 }
401
402
403 skb_dst_drop(skb);
404 if (sock_queue_rcv_skb(sk, skb) < 0) {
405 kfree_skb(skb);
406 return NET_RX_DROP;
407 }
408
409 return 0;
410}
411
412
413
414
415
416
417
418
419int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
420{
421 struct inet_sock *inet = inet_sk(sk);
422 struct raw6_sock *rp = raw6_sk(sk);
423
424 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
425 atomic_inc(&sk->sk_drops);
426 kfree_skb(skb);
427 return NET_RX_DROP;
428 }
429
430 if (!rp->checksum)
431 skb->ip_summed = CHECKSUM_UNNECESSARY;
432
433 if (skb->ip_summed == CHECKSUM_COMPLETE) {
434 skb_postpull_rcsum(skb, skb_network_header(skb),
435 skb_network_header_len(skb));
436 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
437 &ipv6_hdr(skb)->daddr,
438 skb->len, inet->inet_num, skb->csum))
439 skb->ip_summed = CHECKSUM_UNNECESSARY;
440 }
441 if (!skb_csum_unnecessary(skb))
442 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
443 &ipv6_hdr(skb)->daddr,
444 skb->len,
445 inet->inet_num, 0));
446
447 if (inet->hdrincl) {
448 if (skb_checksum_complete(skb)) {
449 atomic_inc(&sk->sk_drops);
450 kfree_skb(skb);
451 return NET_RX_DROP;
452 }
453 }
454
455 rawv6_rcv_skb(sk, skb);
456 return 0;
457}
458
459
460
461
462
463
464
465static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
466 int noblock, int flags, int *addr_len)
467{
468 struct ipv6_pinfo *np = inet6_sk(sk);
469 DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
470 struct sk_buff *skb;
471 size_t copied;
472 int err;
473
474 if (flags & MSG_OOB)
475 return -EOPNOTSUPP;
476
477 if (flags & MSG_ERRQUEUE)
478 return ipv6_recv_error(sk, msg, len, addr_len);
479
480 if (np->rxpmtu && np->rxopt.bits.rxpmtu)
481 return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
482
483 skb = skb_recv_datagram(sk, flags, noblock, &err);
484 if (!skb)
485 goto out;
486
487 copied = skb->len;
488 if (copied > len) {
489 copied = len;
490 msg->msg_flags |= MSG_TRUNC;
491 }
492
493 if (skb_csum_unnecessary(skb)) {
494 err = skb_copy_datagram_msg(skb, 0, msg, copied);
495 } else if (msg->msg_flags&MSG_TRUNC) {
496 if (__skb_checksum_complete(skb))
497 goto csum_copy_err;
498 err = skb_copy_datagram_msg(skb, 0, msg, copied);
499 } else {
500 err = skb_copy_and_csum_datagram_msg(skb, 0, msg);
501 if (err == -EINVAL)
502 goto csum_copy_err;
503 }
504 if (err)
505 goto out_free;
506
507
508 if (sin6) {
509 sin6->sin6_family = AF_INET6;
510 sin6->sin6_port = 0;
511 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
512 sin6->sin6_flowinfo = 0;
513 sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr,
514 inet6_iif(skb));
515 *addr_len = sizeof(*sin6);
516 }
517
518 sock_recv_ts_and_drops(msg, sk, skb);
519
520 if (np->rxopt.all)
521 ip6_datagram_recv_ctl(sk, msg, skb);
522
523 err = copied;
524 if (flags & MSG_TRUNC)
525 err = skb->len;
526
527out_free:
528 skb_free_datagram(sk, skb);
529out:
530 return err;
531
532csum_copy_err:
533 skb_kill_datagram(sk, skb, flags);
534
535
536
537
538 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
539 goto out;
540}
541
542static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
543 struct raw6_sock *rp)
544{
545 struct sk_buff *skb;
546 int err = 0;
547 int offset;
548 int len;
549 int total_len;
550 __wsum tmp_csum;
551 __sum16 csum;
552
553 if (!rp->checksum)
554 goto send;
555
556 skb = skb_peek(&sk->sk_write_queue);
557 if (!skb)
558 goto out;
559
560 offset = rp->offset;
561 total_len = inet_sk(sk)->cork.base.length;
562 if (offset >= total_len - 1) {
563 err = -EINVAL;
564 ip6_flush_pending_frames(sk);
565 goto out;
566 }
567
568
569 if (skb_queue_len(&sk->sk_write_queue) == 1) {
570
571
572
573 tmp_csum = skb->csum;
574 } else {
575 struct sk_buff *csum_skb = NULL;
576 tmp_csum = 0;
577
578 skb_queue_walk(&sk->sk_write_queue, skb) {
579 tmp_csum = csum_add(tmp_csum, skb->csum);
580
581 if (csum_skb)
582 continue;
583
584 len = skb->len - skb_transport_offset(skb);
585 if (offset >= len) {
586 offset -= len;
587 continue;
588 }
589
590 csum_skb = skb;
591 }
592
593 skb = csum_skb;
594 }
595
596 offset += skb_transport_offset(skb);
597 err = skb_copy_bits(skb, offset, &csum, 2);
598 if (err < 0) {
599 ip6_flush_pending_frames(sk);
600 goto out;
601 }
602
603
604 if (unlikely(csum))
605 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
606
607 csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
608 total_len, fl6->flowi6_proto, tmp_csum);
609
610 if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
611 csum = CSUM_MANGLED_0;
612
613 BUG_ON(skb_store_bits(skb, offset, &csum, 2));
614
615send:
616 err = ip6_push_pending_frames(sk);
617out:
618 return err;
619}
620
621static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length,
622 struct flowi6 *fl6, struct dst_entry **dstp,
623 unsigned int flags, const struct sockcm_cookie *sockc)
624{
625 struct ipv6_pinfo *np = inet6_sk(sk);
626 struct net *net = sock_net(sk);
627 struct ipv6hdr *iph;
628 struct sk_buff *skb;
629 int err;
630 struct rt6_info *rt = (struct rt6_info *)*dstp;
631 int hlen = LL_RESERVED_SPACE(rt->dst.dev);
632 int tlen = rt->dst.dev->needed_tailroom;
633
634 if (length > rt->dst.dev->mtu) {
635 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
636 return -EMSGSIZE;
637 }
638 if (length < sizeof(struct ipv6hdr))
639 return -EINVAL;
640 if (flags&MSG_PROBE)
641 goto out;
642
643 skb = sock_alloc_send_skb(sk,
644 length + hlen + tlen + 15,
645 flags & MSG_DONTWAIT, &err);
646 if (!skb)
647 goto error;
648 skb_reserve(skb, hlen);
649
650 skb->protocol = htons(ETH_P_IPV6);
651 skb->priority = sk->sk_priority;
652 skb->mark = sk->sk_mark;
653 skb->tstamp = sockc->transmit_time;
654
655 skb_put(skb, length);
656 skb_reset_network_header(skb);
657 iph = ipv6_hdr(skb);
658
659 skb->ip_summed = CHECKSUM_NONE;
660
661 skb_setup_tx_timestamp(skb, sockc->tsflags);
662
663 if (flags & MSG_CONFIRM)
664 skb_set_dst_pending_confirm(skb, 1);
665
666 skb->transport_header = skb->network_header;
667 err = memcpy_from_msg(iph, msg, length);
668 if (err) {
669 err = -EFAULT;
670 kfree_skb(skb);
671 goto error;
672 }
673
674 skb_dst_set(skb, &rt->dst);
675 *dstp = NULL;
676
677
678
679
680 skb = l3mdev_ip6_out(sk, skb);
681 if (unlikely(!skb))
682 return 0;
683
684
685
686
687
688 rcu_read_lock();
689 IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
690 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, skb,
691 NULL, rt->dst.dev, dst_output);
692 if (err > 0)
693 err = net_xmit_errno(err);
694 if (err) {
695 IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
696 rcu_read_unlock();
697 goto error_check;
698 }
699 rcu_read_unlock();
700out:
701 return 0;
702
703error:
704 IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
705error_check:
706 if (err == -ENOBUFS && !np->recverr)
707 err = 0;
708 return err;
709}
710
711struct raw6_frag_vec {
712 struct msghdr *msg;
713 int hlen;
714 char c[4];
715};
716
717static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6)
718{
719 int err = 0;
720 switch (fl6->flowi6_proto) {
721 case IPPROTO_ICMPV6:
722 rfv->hlen = 2;
723 err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
724 if (!err) {
725 fl6->fl6_icmp_type = rfv->c[0];
726 fl6->fl6_icmp_code = rfv->c[1];
727 }
728 break;
729 case IPPROTO_MH:
730 rfv->hlen = 4;
731 err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
732 if (!err)
733 fl6->fl6_mh_type = rfv->c[2];
734 }
735 return err;
736}
737
738static int raw6_getfrag(void *from, char *to, int offset, int len, int odd,
739 struct sk_buff *skb)
740{
741 struct raw6_frag_vec *rfv = from;
742
743 if (offset < rfv->hlen) {
744 int copy = min(rfv->hlen - offset, len);
745
746 if (skb->ip_summed == CHECKSUM_PARTIAL)
747 memcpy(to, rfv->c + offset, copy);
748 else
749 skb->csum = csum_block_add(
750 skb->csum,
751 csum_partial_copy_nocheck(rfv->c + offset,
752 to, copy, 0),
753 odd);
754
755 odd = 0;
756 offset += copy;
757 to += copy;
758 len -= copy;
759
760 if (!len)
761 return 0;
762 }
763
764 offset -= rfv->hlen;
765
766 return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
767}
768
769static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
770{
771 struct ipv6_txoptions *opt_to_free = NULL;
772 struct ipv6_txoptions opt_space;
773 DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
774 struct in6_addr *daddr, *final_p, final;
775 struct inet_sock *inet = inet_sk(sk);
776 struct ipv6_pinfo *np = inet6_sk(sk);
777 struct raw6_sock *rp = raw6_sk(sk);
778 struct ipv6_txoptions *opt = NULL;
779 struct ip6_flowlabel *flowlabel = NULL;
780 struct dst_entry *dst = NULL;
781 struct raw6_frag_vec rfv;
782 struct flowi6 fl6;
783 struct ipcm6_cookie ipc6;
784 int addr_len = msg->msg_namelen;
785 u16 proto;
786 int err;
787
788
789
790
791 if (len > INT_MAX)
792 return -EMSGSIZE;
793
794
795 if (msg->msg_flags & MSG_OOB)
796 return -EOPNOTSUPP;
797
798
799
800
801 memset(&fl6, 0, sizeof(fl6));
802
803 fl6.flowi6_mark = sk->sk_mark;
804 fl6.flowi6_uid = sk->sk_uid;
805
806 ipcm6_init(&ipc6);
807 ipc6.sockc.tsflags = sk->sk_tsflags;
808
809 if (sin6) {
810 if (addr_len < SIN6_LEN_RFC2133)
811 return -EINVAL;
812
813 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
814 return -EAFNOSUPPORT;
815
816
817 proto = ntohs(sin6->sin6_port);
818
819 if (!proto)
820 proto = inet->inet_num;
821 else if (proto != inet->inet_num)
822 return -EINVAL;
823
824 if (proto > 255)
825 return -EINVAL;
826
827 daddr = &sin6->sin6_addr;
828 if (np->sndflow) {
829 fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
830 if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
831 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
832 if (!flowlabel)
833 return -EINVAL;
834 }
835 }
836
837
838
839
840
841 if (sk->sk_state == TCP_ESTABLISHED &&
842 ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
843 daddr = &sk->sk_v6_daddr;
844
845 if (addr_len >= sizeof(struct sockaddr_in6) &&
846 sin6->sin6_scope_id &&
847 __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
848 fl6.flowi6_oif = sin6->sin6_scope_id;
849 } else {
850 if (sk->sk_state != TCP_ESTABLISHED)
851 return -EDESTADDRREQ;
852
853 proto = inet->inet_num;
854 daddr = &sk->sk_v6_daddr;
855 fl6.flowlabel = np->flow_label;
856 }
857
858 if (fl6.flowi6_oif == 0)
859 fl6.flowi6_oif = sk->sk_bound_dev_if;
860
861 if (msg->msg_controllen) {
862 opt = &opt_space;
863 memset(opt, 0, sizeof(struct ipv6_txoptions));
864 opt->tot_len = sizeof(struct ipv6_txoptions);
865 ipc6.opt = opt;
866
867 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6);
868 if (err < 0) {
869 fl6_sock_release(flowlabel);
870 return err;
871 }
872 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
873 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
874 if (!flowlabel)
875 return -EINVAL;
876 }
877 if (!(opt->opt_nflen|opt->opt_flen))
878 opt = NULL;
879 }
880 if (!opt) {
881 opt = txopt_get(np);
882 opt_to_free = opt;
883 }
884 if (flowlabel)
885 opt = fl6_merge_options(&opt_space, flowlabel, opt);
886 opt = ipv6_fixup_options(&opt_space, opt);
887
888 fl6.flowi6_proto = proto;
889 rfv.msg = msg;
890 rfv.hlen = 0;
891 err = rawv6_probe_proto_opt(&rfv, &fl6);
892 if (err)
893 goto out;
894
895 if (!ipv6_addr_any(daddr))
896 fl6.daddr = *daddr;
897 else
898 fl6.daddr.s6_addr[15] = 0x1;
899 if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
900 fl6.saddr = np->saddr;
901
902 final_p = fl6_update_dst(&fl6, opt, &final);
903
904 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
905 fl6.flowi6_oif = np->mcast_oif;
906 else if (!fl6.flowi6_oif)
907 fl6.flowi6_oif = np->ucast_oif;
908 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
909
910 if (inet->hdrincl)
911 fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH;
912
913 if (ipc6.tclass < 0)
914 ipc6.tclass = np->tclass;
915
916 fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
917
918 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
919 if (IS_ERR(dst)) {
920 err = PTR_ERR(dst);
921 goto out;
922 }
923 if (ipc6.hlimit < 0)
924 ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
925
926 if (ipc6.dontfrag < 0)
927 ipc6.dontfrag = np->dontfrag;
928
929 if (msg->msg_flags&MSG_CONFIRM)
930 goto do_confirm;
931
932back_from_confirm:
933 if (inet->hdrincl)
934 err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst,
935 msg->msg_flags, &ipc6.sockc);
936 else {
937 ipc6.opt = opt;
938 lock_sock(sk);
939 err = ip6_append_data(sk, raw6_getfrag, &rfv,
940 len, 0, &ipc6, &fl6, (struct rt6_info *)dst,
941 msg->msg_flags);
942
943 if (err)
944 ip6_flush_pending_frames(sk);
945 else if (!(msg->msg_flags & MSG_MORE))
946 err = rawv6_push_pending_frames(sk, &fl6, rp);
947 release_sock(sk);
948 }
949done:
950 dst_release(dst);
951out:
952 fl6_sock_release(flowlabel);
953 txopt_put(opt_to_free);
954 return err < 0 ? err : len;
955do_confirm:
956 if (msg->msg_flags & MSG_PROBE)
957 dst_confirm_neigh(dst, &fl6.daddr);
958 if (!(msg->msg_flags & MSG_PROBE) || len)
959 goto back_from_confirm;
960 err = 0;
961 goto done;
962}
963
964static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
965 char __user *optval, int optlen)
966{
967 switch (optname) {
968 case ICMPV6_FILTER:
969 if (optlen > sizeof(struct icmp6_filter))
970 optlen = sizeof(struct icmp6_filter);
971 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
972 return -EFAULT;
973 return 0;
974 default:
975 return -ENOPROTOOPT;
976 }
977
978 return 0;
979}
980
981static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
982 char __user *optval, int __user *optlen)
983{
984 int len;
985
986 switch (optname) {
987 case ICMPV6_FILTER:
988 if (get_user(len, optlen))
989 return -EFAULT;
990 if (len < 0)
991 return -EINVAL;
992 if (len > sizeof(struct icmp6_filter))
993 len = sizeof(struct icmp6_filter);
994 if (put_user(len, optlen))
995 return -EFAULT;
996 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
997 return -EFAULT;
998 return 0;
999 default:
1000 return -ENOPROTOOPT;
1001 }
1002
1003 return 0;
1004}
1005
1006
1007static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
1008 char __user *optval, unsigned int optlen)
1009{
1010 struct raw6_sock *rp = raw6_sk(sk);
1011 int val;
1012
1013 if (get_user(val, (int __user *)optval))
1014 return -EFAULT;
1015
1016 switch (optname) {
1017 case IPV6_HDRINCL:
1018 if (sk->sk_type != SOCK_RAW)
1019 return -EINVAL;
1020 inet_sk(sk)->hdrincl = !!val;
1021 return 0;
1022 case IPV6_CHECKSUM:
1023 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
1024 level == IPPROTO_IPV6) {
1025
1026
1027
1028
1029
1030
1031
1032
1033 return -EINVAL;
1034 }
1035
1036
1037
1038 if (val > 0 && (val&1))
1039 return -EINVAL;
1040 if (val < 0) {
1041 rp->checksum = 0;
1042 } else {
1043 rp->checksum = 1;
1044 rp->offset = val;
1045 }
1046
1047 return 0;
1048
1049 default:
1050 return -ENOPROTOOPT;
1051 }
1052}
1053
1054static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1055 char __user *optval, unsigned int optlen)
1056{
1057 switch (level) {
1058 case SOL_RAW:
1059 break;
1060
1061 case SOL_ICMPV6:
1062 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1063 return -EOPNOTSUPP;
1064 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1065 case SOL_IPV6:
1066 if (optname == IPV6_CHECKSUM ||
1067 optname == IPV6_HDRINCL)
1068 break;
1069
1070 default:
1071 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1072 }
1073
1074 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1075}
1076
1077#ifdef CONFIG_COMPAT
1078static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1079 char __user *optval, unsigned int optlen)
1080{
1081 switch (level) {
1082 case SOL_RAW:
1083 break;
1084 case SOL_ICMPV6:
1085 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1086 return -EOPNOTSUPP;
1087 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1088 case SOL_IPV6:
1089 if (optname == IPV6_CHECKSUM ||
1090 optname == IPV6_HDRINCL)
1091 break;
1092
1093 default:
1094 return compat_ipv6_setsockopt(sk, level, optname,
1095 optval, optlen);
1096 }
1097 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1098}
1099#endif
1100
1101static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1102 char __user *optval, int __user *optlen)
1103{
1104 struct raw6_sock *rp = raw6_sk(sk);
1105 int val, len;
1106
1107 if (get_user(len, optlen))
1108 return -EFAULT;
1109
1110 switch (optname) {
1111 case IPV6_HDRINCL:
1112 val = inet_sk(sk)->hdrincl;
1113 break;
1114 case IPV6_CHECKSUM:
1115
1116
1117
1118
1119
1120 if (rp->checksum == 0)
1121 val = -1;
1122 else
1123 val = rp->offset;
1124 break;
1125
1126 default:
1127 return -ENOPROTOOPT;
1128 }
1129
1130 len = min_t(unsigned int, sizeof(int), len);
1131
1132 if (put_user(len, optlen))
1133 return -EFAULT;
1134 if (copy_to_user(optval, &val, len))
1135 return -EFAULT;
1136 return 0;
1137}
1138
1139static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1140 char __user *optval, int __user *optlen)
1141{
1142 switch (level) {
1143 case SOL_RAW:
1144 break;
1145
1146 case SOL_ICMPV6:
1147 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1148 return -EOPNOTSUPP;
1149 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1150 case SOL_IPV6:
1151 if (optname == IPV6_CHECKSUM ||
1152 optname == IPV6_HDRINCL)
1153 break;
1154
1155 default:
1156 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1157 }
1158
1159 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1160}
1161
1162#ifdef CONFIG_COMPAT
1163static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1164 char __user *optval, int __user *optlen)
1165{
1166 switch (level) {
1167 case SOL_RAW:
1168 break;
1169 case SOL_ICMPV6:
1170 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1171 return -EOPNOTSUPP;
1172 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1173 case SOL_IPV6:
1174 if (optname == IPV6_CHECKSUM ||
1175 optname == IPV6_HDRINCL)
1176 break;
1177
1178 default:
1179 return compat_ipv6_getsockopt(sk, level, optname,
1180 optval, optlen);
1181 }
1182 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1183}
1184#endif
1185
1186static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1187{
1188 switch (cmd) {
1189 case SIOCOUTQ: {
1190 int amount = sk_wmem_alloc_get(sk);
1191
1192 return put_user(amount, (int __user *)arg);
1193 }
1194 case SIOCINQ: {
1195 struct sk_buff *skb;
1196 int amount = 0;
1197
1198 spin_lock_bh(&sk->sk_receive_queue.lock);
1199 skb = skb_peek(&sk->sk_receive_queue);
1200 if (skb)
1201 amount = skb->len;
1202 spin_unlock_bh(&sk->sk_receive_queue.lock);
1203 return put_user(amount, (int __user *)arg);
1204 }
1205
1206 default:
1207#ifdef CONFIG_IPV6_MROUTE
1208 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1209#else
1210 return -ENOIOCTLCMD;
1211#endif
1212 }
1213}
1214
1215#ifdef CONFIG_COMPAT
1216static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1217{
1218 switch (cmd) {
1219 case SIOCOUTQ:
1220 case SIOCINQ:
1221 return -ENOIOCTLCMD;
1222 default:
1223#ifdef CONFIG_IPV6_MROUTE
1224 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1225#else
1226 return -ENOIOCTLCMD;
1227#endif
1228 }
1229}
1230#endif
1231
1232static void rawv6_close(struct sock *sk, long timeout)
1233{
1234 if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1235 ip6_ra_control(sk, -1);
1236 ip6mr_sk_done(sk);
1237 sk_common_release(sk);
1238}
1239
1240static void raw6_destroy(struct sock *sk)
1241{
1242 lock_sock(sk);
1243 ip6_flush_pending_frames(sk);
1244 release_sock(sk);
1245
1246 inet6_destroy_sock(sk);
1247}
1248
1249static int rawv6_init_sk(struct sock *sk)
1250{
1251 struct raw6_sock *rp = raw6_sk(sk);
1252
1253 switch (inet_sk(sk)->inet_num) {
1254 case IPPROTO_ICMPV6:
1255 rp->checksum = 1;
1256 rp->offset = 2;
1257 break;
1258 case IPPROTO_MH:
1259 rp->checksum = 1;
1260 rp->offset = 4;
1261 break;
1262 default:
1263 break;
1264 }
1265 return 0;
1266}
1267
1268struct proto rawv6_prot = {
1269 .name = "RAWv6",
1270 .owner = THIS_MODULE,
1271 .close = rawv6_close,
1272 .destroy = raw6_destroy,
1273 .connect = ip6_datagram_connect_v6_only,
1274 .disconnect = __udp_disconnect,
1275 .ioctl = rawv6_ioctl,
1276 .init = rawv6_init_sk,
1277 .setsockopt = rawv6_setsockopt,
1278 .getsockopt = rawv6_getsockopt,
1279 .sendmsg = rawv6_sendmsg,
1280 .recvmsg = rawv6_recvmsg,
1281 .bind = rawv6_bind,
1282 .backlog_rcv = rawv6_rcv_skb,
1283 .hash = raw_hash_sk,
1284 .unhash = raw_unhash_sk,
1285 .obj_size = sizeof(struct raw6_sock),
1286 .useroffset = offsetof(struct raw6_sock, filter),
1287 .usersize = sizeof_field(struct raw6_sock, filter),
1288 .h.raw_hash = &raw_v6_hashinfo,
1289#ifdef CONFIG_COMPAT
1290 .compat_setsockopt = compat_rawv6_setsockopt,
1291 .compat_getsockopt = compat_rawv6_getsockopt,
1292 .compat_ioctl = compat_rawv6_ioctl,
1293#endif
1294 .diag_destroy = raw_abort,
1295};
1296
1297#ifdef CONFIG_PROC_FS
1298static int raw6_seq_show(struct seq_file *seq, void *v)
1299{
1300 if (v == SEQ_START_TOKEN) {
1301 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1302 } else {
1303 struct sock *sp = v;
1304 __u16 srcp = inet_sk(sp)->inet_num;
1305 ip6_dgram_sock_seq_show(seq, v, srcp, 0,
1306 raw_seq_private(seq)->bucket);
1307 }
1308 return 0;
1309}
1310
1311static const struct seq_operations raw6_seq_ops = {
1312 .start = raw_seq_start,
1313 .next = raw_seq_next,
1314 .stop = raw_seq_stop,
1315 .show = raw6_seq_show,
1316};
1317
1318static int __net_init raw6_init_net(struct net *net)
1319{
1320 if (!proc_create_net_data("raw6", 0444, net->proc_net, &raw6_seq_ops,
1321 sizeof(struct raw_iter_state), &raw_v6_hashinfo))
1322 return -ENOMEM;
1323
1324 return 0;
1325}
1326
1327static void __net_exit raw6_exit_net(struct net *net)
1328{
1329 remove_proc_entry("raw6", net->proc_net);
1330}
1331
1332static struct pernet_operations raw6_net_ops = {
1333 .init = raw6_init_net,
1334 .exit = raw6_exit_net,
1335};
1336
1337int __init raw6_proc_init(void)
1338{
1339 return register_pernet_subsys(&raw6_net_ops);
1340}
1341
1342void raw6_proc_exit(void)
1343{
1344 unregister_pernet_subsys(&raw6_net_ops);
1345}
1346#endif
1347
1348
1349const struct proto_ops inet6_sockraw_ops = {
1350 .family = PF_INET6,
1351 .owner = THIS_MODULE,
1352 .release = inet6_release,
1353 .bind = inet6_bind,
1354 .connect = inet_dgram_connect,
1355 .socketpair = sock_no_socketpair,
1356 .accept = sock_no_accept,
1357 .getname = inet6_getname,
1358 .poll = datagram_poll,
1359 .ioctl = inet6_ioctl,
1360 .listen = sock_no_listen,
1361 .shutdown = inet_shutdown,
1362 .setsockopt = sock_common_setsockopt,
1363 .getsockopt = sock_common_getsockopt,
1364 .sendmsg = inet_sendmsg,
1365 .recvmsg = sock_common_recvmsg,
1366 .mmap = sock_no_mmap,
1367 .sendpage = sock_no_sendpage,
1368#ifdef CONFIG_COMPAT
1369 .compat_setsockopt = compat_sock_common_setsockopt,
1370 .compat_getsockopt = compat_sock_common_getsockopt,
1371#endif
1372};
1373
1374static struct inet_protosw rawv6_protosw = {
1375 .type = SOCK_RAW,
1376 .protocol = IPPROTO_IP,
1377 .prot = &rawv6_prot,
1378 .ops = &inet6_sockraw_ops,
1379 .flags = INET_PROTOSW_REUSE,
1380};
1381
1382int __init rawv6_init(void)
1383{
1384 return inet6_register_protosw(&rawv6_protosw);
1385}
1386
1387void rawv6_exit(void)
1388{
1389 inet6_unregister_protosw(&rawv6_protosw);
1390}
1391
