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[IPV6]: Fix calculation of AH length during filling ancillary data.
[mirror_ubuntu-artful-kernel.git] / net / ipv6 / raw.c
CommitLineData
1da177e4
LT		 1/*
2 * RAW sockets for IPv6
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Adapted from linux/net/ipv4/raw.c
9 *
10 * $Id: raw.c,v 1.51 2002/02/01 22:01:04 davem Exp $
11 *
12 * Fixes:
13 * Hideaki YOSHIFUJI : sin6_scope_id support
14 * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance)
15 * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version
20 * 2 of the License, or (at your option) any later version.
21 */
22
23#include <linux/errno.h>
24#include <linux/types.h>
25#include <linux/socket.h>
26#include <linux/sockios.h>
27#include <linux/sched.h>
28#include <linux/net.h>
29#include <linux/in6.h>
30#include <linux/netdevice.h>
31#include <linux/if_arp.h>
32#include <linux/icmpv6.h>
33#include <linux/netfilter.h>
34#include <linux/netfilter_ipv6.h>
35#include <asm/uaccess.h>
36#include <asm/ioctls.h>
357b40a1 37#include <asm/bug.h>
1da177e4
LT		 38
39#include <net/ip.h>
40#include <net/sock.h>
41#include <net/snmp.h>
42
43#include <net/ipv6.h>
44#include <net/ndisc.h>
45#include <net/protocol.h>
46#include <net/ip6_route.h>
47#include <net/ip6_checksum.h>
48#include <net/addrconf.h>
49#include <net/transp_v6.h>
50#include <net/udp.h>
51#include <net/inet_common.h>
c752f073 52#include <net/tcp_states.h>
1da177e4
LT		 53
54#include <net/rawv6.h>
55#include <net/xfrm.h>
56
57#include <linux/proc_fs.h>
58#include <linux/seq_file.h>
59
60struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
61DEFINE_RWLOCK(raw_v6_lock);
62
63static void raw_v6_hash(struct sock *sk)
64{
65 struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num &
66 (RAWV6_HTABLE_SIZE - 1)];
67
68 write_lock_bh(&raw_v6_lock);
69 sk_add_node(sk, list);
70 sock_prot_inc_use(sk->sk_prot);
71 write_unlock_bh(&raw_v6_lock);
72}
73
74static void raw_v6_unhash(struct sock *sk)
75{
76 write_lock_bh(&raw_v6_lock);
77 if (sk_del_node_init(sk))
78 sock_prot_dec_use(sk->sk_prot);
79 write_unlock_bh(&raw_v6_lock);
80}
81
82
83/* Grumble... icmp and ip_input want to get at this... */
84struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
0bd1b59b
AM		 85 struct in6_addr *loc_addr, struct in6_addr *rmt_addr,
86 int dif)
1da177e4
LT		 87{
88 struct hlist_node *node;
89 int is_multicast = ipv6_addr_is_multicast(loc_addr);
90
91 sk_for_each_from(sk, node)
92 if (inet_sk(sk)->num == num) {
93 struct ipv6_pinfo *np = inet6_sk(sk);
94
95 if (!ipv6_addr_any(&np->daddr) &&
96 !ipv6_addr_equal(&np->daddr, rmt_addr))
97 continue;
98
0bd1b59b
AM		 99 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
100 continue;
101
1da177e4
LT		 102 if (!ipv6_addr_any(&np->rcv_saddr)) {
103 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
104 goto found;
105 if (is_multicast &&
106 inet6_mc_check(sk, loc_addr, rmt_addr))
107 goto found;
108 continue;
109 }
110 goto found;
111 }
112 sk = NULL;
113found:
114 return sk;
115}
116
117/*
118 * 0 - deliver
119 * 1 - block
120 */
121static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
122{
123 struct icmp6hdr *icmph;
124 struct raw6_sock *rp = raw6_sk(sk);
125
126 if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
127 __u32 *data = &rp->filter.data[0];
128 int bit_nr;
129
130 icmph = (struct icmp6hdr *) skb->data;
131 bit_nr = icmph->icmp6_type;
132
133 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
134 }
135 return 0;
136}
137
138/*
139 * demultiplex raw sockets.
140 * (should consider queueing the skb in the sock receive_queue
141 * without calling rawv6.c)
142 *
143 * Caller owns SKB so we must make clones.
144 */
d13964f4 145int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
1da177e4
LT		 146{
147 struct in6_addr *saddr;
148 struct in6_addr *daddr;
149 struct sock *sk;
d13964f4 150 int delivered = 0;
1da177e4
LT		 151 __u8 hash;
152
153 saddr = &skb->nh.ipv6h->saddr;
154 daddr = saddr + 1;
155
156 hash = nexthdr & (MAX_INET_PROTOS - 1);
157
158 read_lock(&raw_v6_lock);
159 sk = sk_head(&raw_v6_htable[hash]);
160
161 /*
162 * The first socket found will be delivered after
163 * delivery to transport protocols.
164 */
165
166 if (sk == NULL)
167 goto out;
168
2dac4b96 169 sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
1da177e4
LT		 170
171 while (sk) {
d13964f4 172 delivered = 1;
1da177e4
LT		 173 if (nexthdr != IPPROTO_ICMPV6 || !icmpv6_filter(sk, skb)) {
174 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
175
176 /* Not releasing hash table! */
177 if (clone)
178 rawv6_rcv(sk, clone);
179 }
0bd1b59b 180 sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr,
2dac4b96 181 IP6CB(skb)->iif);
1da177e4
LT		 182 }
183out:
184 read_unlock(&raw_v6_lock);
d13964f4 185 return delivered;
1da177e4
LT		 186}
187
188/* This cleans up af_inet6 a bit. -DaveM */
189static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
190{
191 struct inet_sock *inet = inet_sk(sk);
192 struct ipv6_pinfo *np = inet6_sk(sk);
193 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
194 __u32 v4addr = 0;
195 int addr_type;
196 int err;
197
198 if (addr_len < SIN6_LEN_RFC2133)
199 return -EINVAL;
200 addr_type = ipv6_addr_type(&addr->sin6_addr);
201
202 /* Raw sockets are IPv6 only */
203 if (addr_type == IPV6_ADDR_MAPPED)
204 return(-EADDRNOTAVAIL);
205
206 lock_sock(sk);
207
208 err = -EINVAL;
209 if (sk->sk_state != TCP_CLOSE)
210 goto out;
211
212 /* Check if the address belongs to the host. */
213 if (addr_type != IPV6_ADDR_ANY) {
214 struct net_device *dev = NULL;
215
216 if (addr_type & IPV6_ADDR_LINKLOCAL) {
217 if (addr_len >= sizeof(struct sockaddr_in6) &&
218 addr->sin6_scope_id) {
219 /* Override any existing binding, if another
220 * one is supplied by user.
221 */
222 sk->sk_bound_dev_if = addr->sin6_scope_id;
223 }
224
225 /* Binding to link-local address requires an interface */
226 if (!sk->sk_bound_dev_if)
227 goto out;
228
229 dev = dev_get_by_index(sk->sk_bound_dev_if);
230 if (!dev) {
231 err = -ENODEV;
232 goto out;
233 }
234 }
235
236 /* ipv4 addr of the socket is invalid. Only the
237 * unspecified and mapped address have a v4 equivalent.
238 */
239 v4addr = LOOPBACK4_IPV6;
240 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
241 err = -EADDRNOTAVAIL;
242 if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
243 if (dev)
244 dev_put(dev);
245 goto out;
246 }
247 }
248 if (dev)
249 dev_put(dev);
250 }
251
252 inet->rcv_saddr = inet->saddr = v4addr;
253 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
254 if (!(addr_type & IPV6_ADDR_MULTICAST))
255 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
256 err = 0;
257out:
258 release_sock(sk);
259 return err;
260}
261
262void rawv6_err(struct sock *sk, struct sk_buff *skb,
263 struct inet6_skb_parm *opt,
264 int type, int code, int offset, u32 info)
265{
266 struct inet_sock *inet = inet_sk(sk);
267 struct ipv6_pinfo *np = inet6_sk(sk);
268 int err;
269 int harderr;
270
271 /* Report error on raw socket, if:
272 1. User requested recverr.
273 2. Socket is connected (otherwise the error indication
274 is useless without recverr and error is hard.
275 */
276 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
277 return;
278
279 harderr = icmpv6_err_convert(type, code, &err);
280 if (type == ICMPV6_PKT_TOOBIG)
281 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
282
283 if (np->recverr) {
284 u8 *payload = skb->data;
285 if (!inet->hdrincl)
286 payload += offset;
287 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
288 }
289
290 if (np->recverr || harderr) {
291 sk->sk_err = err;
292 sk->sk_error_report(sk);
293 }
294}
295
296static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
297{
298 if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
299 skb->ip_summed != CHECKSUM_UNNECESSARY) {
300 if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) {
301 /* FIXME: increment a raw6 drops counter here */
302 kfree_skb(skb);
303 return 0;
304 }
305 skb->ip_summed = CHECKSUM_UNNECESSARY;
306 }
307
308 /* Charge it to the socket. */
309 if (sock_queue_rcv_skb(sk,skb)<0) {
310 /* FIXME: increment a raw6 drops counter here */
311 kfree_skb(skb);
312 return 0;
313 }
314
315 return 0;
316}
317
318/*
319 * This is next to useless...
320 * if we demultiplex in network layer we don't need the extra call
321 * just to queue the skb...
322 * maybe we could have the network decide upon a hint if it
323 * should call raw_rcv for demultiplexing
324 */
325int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
326{
327 struct inet_sock *inet = inet_sk(sk);
328 struct raw6_sock *rp = raw6_sk(sk);
329
330 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
331 kfree_skb(skb);
332 return NET_RX_DROP;
333 }
334
335 if (!rp->checksum)
336 skb->ip_summed = CHECKSUM_UNNECESSARY;
337
338 if (skb->ip_summed != CHECKSUM_UNNECESSARY) {
339 if (skb->ip_summed == CHECKSUM_HW) {
793245ee
PM		 340 skb_postpull_rcsum(skb, skb->nh.raw,
341 skb->h.raw - skb->nh.raw);
1da177e4
LT		 342 skb->ip_summed = CHECKSUM_UNNECESSARY;
343 if (csum_ipv6_magic(&skb->nh.ipv6h->saddr,
344 &skb->nh.ipv6h->daddr,
345 skb->len, inet->num, skb->csum)) {
64ce2073 346 LIMIT_NETDEBUG(KERN_DEBUG "raw v6 hw csum failure.\n");
1da177e4
LT		 347 skb->ip_summed = CHECKSUM_NONE;
348 }
349 }
350 if (skb->ip_summed == CHECKSUM_NONE)
351 skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
352 &skb->nh.ipv6h->daddr,
353 skb->len, inet->num, 0);
354 }
355
356 if (inet->hdrincl) {
357 if (skb->ip_summed != CHECKSUM_UNNECESSARY &&
358 (unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum))) {
359 /* FIXME: increment a raw6 drops counter here */
360 kfree_skb(skb);
361 return 0;
362 }
363 skb->ip_summed = CHECKSUM_UNNECESSARY;
364 }
365
366 rawv6_rcv_skb(sk, skb);
367 return 0;
368}
369
370
371/*
372 * This should be easy, if there is something there
373 * we return it, otherwise we block.
374 */
375
376static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
377 struct msghdr *msg, size_t len,
378 int noblock, int flags, int *addr_len)
379{
380 struct ipv6_pinfo *np = inet6_sk(sk);
381 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
382 struct sk_buff *skb;
383 size_t copied;
384 int err;
385
386 if (flags & MSG_OOB)
387 return -EOPNOTSUPP;
388
389 if (addr_len)
390 *addr_len=sizeof(*sin6);
391
392 if (flags & MSG_ERRQUEUE)
393 return ipv6_recv_error(sk, msg, len);
394
395 skb = skb_recv_datagram(sk, flags, noblock, &err);
396 if (!skb)
397 goto out;
398
399 copied = skb->len;
400 if (copied > len) {
401 copied = len;
402 msg->msg_flags |= MSG_TRUNC;
403 }
404
405 if (skb->ip_summed==CHECKSUM_UNNECESSARY) {
406 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
407 } else if (msg->msg_flags&MSG_TRUNC) {
408 if ((unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum)))
409 goto csum_copy_err;
410 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
411 } else {
412 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
413 if (err == -EINVAL)
414 goto csum_copy_err;
415 }
416 if (err)
417 goto out_free;
418
419 /* Copy the address. */
420 if (sin6) {
421 sin6->sin6_family = AF_INET6;
422 ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr);
423 sin6->sin6_flowinfo = 0;
424 sin6->sin6_scope_id = 0;
425 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
426 sin6->sin6_scope_id = IP6CB(skb)->iif;
427 }
428
429 sock_recv_timestamp(msg, sk, skb);
430
431 if (np->rxopt.all)
432 datagram_recv_ctl(sk, msg, skb);
433
434 err = copied;
435 if (flags & MSG_TRUNC)
436 err = skb->len;
437
438out_free:
439 skb_free_datagram(sk, skb);
440out:
441 return err;
442
443csum_copy_err:
444 /* Clear queue. */
445 if (flags&MSG_PEEK) {
446 int clear = 0;
e0f9f858 447 spin_lock_bh(&sk->sk_receive_queue.lock);
1da177e4
LT		 448 if (skb == skb_peek(&sk->sk_receive_queue)) {
449 __skb_unlink(skb, &sk->sk_receive_queue);
450 clear = 1;
451 }
e0f9f858 452 spin_unlock_bh(&sk->sk_receive_queue.lock);
1da177e4
LT		 453 if (clear)
454 kfree_skb(skb);
455 }
456
457 /* Error for blocking case is chosen to masquerade
458 as some normal condition.
459 */
460 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
461 /* FIXME: increment a raw6 drops counter here */
462 goto out_free;
463}
464
465static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
357b40a1 466 struct raw6_sock *rp)
1da177e4
LT		 467{
468 struct sk_buff *skb;
469 int err = 0;
357b40a1
HX		 470 int offset;
471 int len;
679a8738 472 int total_len;
1da177e4 473 u32 tmp_csum;
357b40a1 474 u16 csum;
1da177e4
LT		 475
476 if (!rp->checksum)
477 goto send;
478
479 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
480 goto out;
481
357b40a1 482 offset = rp->offset;
679a8738
HX		 483 total_len = inet_sk(sk)->cork.length - (skb->nh.raw - skb->data);
484 if (offset >= total_len - 1) {
1da177e4 485 err = -EINVAL;
357b40a1 486 ip6_flush_pending_frames(sk);
1da177e4
LT		 487 goto out;
488 }
489
490 /* should be check HW csum miyazawa */
491 if (skb_queue_len(&sk->sk_write_queue) == 1) {
492 /*
493 * Only one fragment on the socket.
494 */
495 tmp_csum = skb->csum;
496 } else {
357b40a1 497 struct sk_buff *csum_skb = NULL;
1da177e4
LT		 498 tmp_csum = 0;
499
500 skb_queue_walk(&sk->sk_write_queue, skb) {
501 tmp_csum = csum_add(tmp_csum, skb->csum);
357b40a1
HX		 502
503 if (csum_skb)
504 continue;
505
506 len = skb->len - (skb->h.raw - skb->data);
507 if (offset >= len) {
508 offset -= len;
509 continue;
510 }
511
512 csum_skb = skb;
1da177e4 513 }
357b40a1
HX		 514
515 skb = csum_skb;
1da177e4
LT		 516 }
517
357b40a1
HX		 518 offset += skb->h.raw - skb->data;
519 if (skb_copy_bits(skb, offset, &csum, 2))
520 BUG();
521
1da177e4 522 /* in case cksum was not initialized */
357b40a1
HX		 523 if (unlikely(csum))
524 tmp_csum = csum_sub(tmp_csum, csum);
525
526 tmp_csum = csum_ipv6_magic(&fl->fl6_src,
527 &fl->fl6_dst,
679a8738 528 total_len, fl->proto, tmp_csum);
357b40a1
HX		 529
530 if (tmp_csum == 0)
531 tmp_csum = -1;
1da177e4 532
357b40a1
HX		 533 csum = tmp_csum;
534 if (skb_store_bits(skb, offset, &csum, 2))
535 BUG();
1da177e4 536
1da177e4
LT		 537send:
538 err = ip6_push_pending_frames(sk);
539out:
540 return err;
541}
542
543static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
544 struct flowi *fl, struct rt6_info *rt,
545 unsigned int flags)
546{
3320da89 547 struct ipv6_pinfo *np = inet6_sk(sk);
1da177e4
LT		 548 struct ipv6hdr *iph;
549 struct sk_buff *skb;
550 unsigned int hh_len;
551 int err;
552
553 if (length > rt->u.dst.dev->mtu) {
554 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
555 return -EMSGSIZE;
556 }
557 if (flags&MSG_PROBE)
558 goto out;
559
560 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
561
562 skb = sock_alloc_send_skb(sk, length+hh_len+15,
563 flags&MSG_DONTWAIT, &err);
564 if (skb == NULL)
565 goto error;
566 skb_reserve(skb, hh_len);
567
568 skb->priority = sk->sk_priority;
569 skb->dst = dst_clone(&rt->u.dst);
570
571 skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length);
572
573 skb->ip_summed = CHECKSUM_NONE;
574
575 skb->h.raw = skb->nh.raw;
576 err = memcpy_fromiovecend((void *)iph, from, 0, length);
577 if (err)
578 goto error_fault;
579
580 IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
581 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
582 dst_output);
583 if (err > 0)
3320da89 584 err = np->recverr ? net_xmit_errno(err) : 0;
1da177e4
LT		 585 if (err)
586 goto error;
587out:
588 return 0;
589
590error_fault:
591 err = -EFAULT;
592 kfree_skb(skb);
593error:
594 IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
595 return err;
596}
597
598static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
599{
600 struct iovec *iov;
601 u8 __user *type = NULL;
602 u8 __user *code = NULL;
603 int probed = 0;
604 int i;
605
606 if (!msg->msg_iov)
607 return;
608
609 for (i = 0; i < msg->msg_iovlen; i++) {
610 iov = &msg->msg_iov[i];
611 if (!iov)
612 continue;
613
614 switch (fl->proto) {
615 case IPPROTO_ICMPV6:
616 /* check if one-byte field is readable or not. */
617 if (iov->iov_base && iov->iov_len < 1)
618 break;
619
620 if (!type) {
621 type = iov->iov_base;
622 /* check if code field is readable or not. */
623 if (iov->iov_len > 1)
624 code = type + 1;
625 } else if (!code)
626 code = iov->iov_base;
627
628 if (type && code) {
629 get_user(fl->fl_icmp_type, type);
6d1cfe3f 630 get_user(fl->fl_icmp_code, code);
1da177e4
LT		 631 probed = 1;
632 }
633 break;
634 default:
635 probed = 1;
636 break;
637 }
638 if (probed)
639 break;
640 }
641}
642
643static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
644 struct msghdr *msg, size_t len)
645{
646 struct ipv6_txoptions opt_space;
647 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
648 struct in6_addr *daddr, *final_p = NULL, final;
649 struct inet_sock *inet = inet_sk(sk);
650 struct ipv6_pinfo *np = inet6_sk(sk);
651 struct raw6_sock *rp = raw6_sk(sk);
652 struct ipv6_txoptions *opt = NULL;
653 struct ip6_flowlabel *flowlabel = NULL;
654 struct dst_entry *dst = NULL;
655 struct flowi fl;
656 int addr_len = msg->msg_namelen;
657 int hlimit = -1;
41a1f8ea 658 int tclass = -1;
1da177e4
LT		 659 u16 proto;
660 int err;
661
662 /* Rough check on arithmetic overflow,
663 better check is made in ip6_build_xmit
664 */
665 if (len < 0)
666 return -EMSGSIZE;
667
668 /* Mirror BSD error message compatibility */
669 if (msg->msg_flags & MSG_OOB)
670 return -EOPNOTSUPP;
671
672 /*
673 * Get and verify the address.
674 */
675 memset(&fl, 0, sizeof(fl));
676
677 if (sin6) {
678 if (addr_len < SIN6_LEN_RFC2133)
679 return -EINVAL;
680
681 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
682 return(-EAFNOSUPPORT);
683
684 /* port is the proto value [0..255] carried in nexthdr */
685 proto = ntohs(sin6->sin6_port);
686
687 if (!proto)
688 proto = inet->num;
689 else if (proto != inet->num)
690 return(-EINVAL);
691
692 if (proto > 255)
693 return(-EINVAL);
694
695 daddr = &sin6->sin6_addr;
696 if (np->sndflow) {
697 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
698 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
699 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
700 if (flowlabel == NULL)
701 return -EINVAL;
702 daddr = &flowlabel->dst;
703 }
704 }
705
706 /*
707 * Otherwise it will be difficult to maintain
708 * sk->sk_dst_cache.
709 */
710 if (sk->sk_state == TCP_ESTABLISHED &&
711 ipv6_addr_equal(daddr, &np->daddr))
712 daddr = &np->daddr;
713
714 if (addr_len >= sizeof(struct sockaddr_in6) &&
715 sin6->sin6_scope_id &&
716 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
717 fl.oif = sin6->sin6_scope_id;
718 } else {
719 if (sk->sk_state != TCP_ESTABLISHED)
720 return -EDESTADDRREQ;
721
722 proto = inet->num;
723 daddr = &np->daddr;
724 fl.fl6_flowlabel = np->flow_label;
725 }
726
727 if (ipv6_addr_any(daddr)) {
728 /*
729 * unspecified destination address
730 * treated as error... is this correct ?
731 */
732 fl6_sock_release(flowlabel);
733 return(-EINVAL);
734 }
735
736 if (fl.oif == 0)
737 fl.oif = sk->sk_bound_dev_if;
738
739 if (msg->msg_controllen) {
740 opt = &opt_space;
741 memset(opt, 0, sizeof(struct ipv6_txoptions));
742 opt->tot_len = sizeof(struct ipv6_txoptions);
743
41a1f8ea 744 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
1da177e4
LT		 745 if (err < 0) {
746 fl6_sock_release(flowlabel);
747 return err;
748 }
749 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
750 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
751 if (flowlabel == NULL)
752 return -EINVAL;
753 }
754 if (!(opt->opt_nflen|opt->opt_flen))
755 opt = NULL;
756 }
757 if (opt == NULL)
758 opt = np->opt;
333fad53 759 opt = fl6_merge_options(&opt_space, flowlabel, opt);
1da177e4
LT		 760
761 fl.proto = proto;
762 rawv6_probe_proto_opt(&fl, msg);
763
764 ipv6_addr_copy(&fl.fl6_dst, daddr);
765 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
766 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
767
768 /* merge ip6_build_xmit from ip6_output */
769 if (opt && opt->srcrt) {
770 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
771 ipv6_addr_copy(&final, &fl.fl6_dst);
772 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
773 final_p = &final;
774 }
775
776 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
777 fl.oif = np->mcast_oif;
778
779 err = ip6_dst_lookup(sk, &dst, &fl);
780 if (err)
781 goto out;
782 if (final_p)
783 ipv6_addr_copy(&fl.fl6_dst, final_p);
784
e104411b 785 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
1da177e4 786 goto out;
1da177e4
LT		 787
788 if (hlimit < 0) {
789 if (ipv6_addr_is_multicast(&fl.fl6_dst))
790 hlimit = np->mcast_hops;
791 else
792 hlimit = np->hop_limit;
793 if (hlimit < 0)
794 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
795 if (hlimit < 0)
796 hlimit = ipv6_get_hoplimit(dst->dev);
797 }
798
41a1f8ea
YH		 799 if (tclass < 0) {
800 tclass = np->cork.tclass;
801 if (tclass < 0)
802 tclass = 0;
803 }
804
1da177e4
LT		 805 if (msg->msg_flags&MSG_CONFIRM)
806 goto do_confirm;
807
808back_from_confirm:
809 if (inet->hdrincl) {
810 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
811 } else {
812 lock_sock(sk);
41a1f8ea
YH		 813 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
814 len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
815 msg->msg_flags);
1da177e4
LT		 816
817 if (err)
818 ip6_flush_pending_frames(sk);
819 else if (!(msg->msg_flags & MSG_MORE))
357b40a1 820 err = rawv6_push_pending_frames(sk, &fl, rp);
1da177e4
LT		 821 }
822done:
823 ip6_dst_store(sk, dst,
824 ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
825 &np->daddr : NULL);
1da177e4
LT		 826
827 release_sock(sk);
828out:
829 fl6_sock_release(flowlabel);
830 return err<0?err:len;
831do_confirm:
832 dst_confirm(dst);
833 if (!(msg->msg_flags & MSG_PROBE) || len)
834 goto back_from_confirm;
835 err = 0;
836 goto done;
837}
838
839static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
840 char __user *optval, int optlen)
841{
842 switch (optname) {
843 case ICMPV6_FILTER:
844 if (optlen > sizeof(struct icmp6_filter))
845 optlen = sizeof(struct icmp6_filter);
846 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
847 return -EFAULT;
848 return 0;
849 default:
850 return -ENOPROTOOPT;
851 };
852
853 return 0;
854}
855
856static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
857 char __user *optval, int __user *optlen)
858{
859 int len;
860
861 switch (optname) {
862 case ICMPV6_FILTER:
863 if (get_user(len, optlen))
864 return -EFAULT;
865 if (len < 0)
866 return -EINVAL;
867 if (len > sizeof(struct icmp6_filter))
868 len = sizeof(struct icmp6_filter);
869 if (put_user(len, optlen))
870 return -EFAULT;
871 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
872 return -EFAULT;
873 return 0;
874 default:
875 return -ENOPROTOOPT;
876 };
877
878 return 0;
879}
880
881
882static int rawv6_setsockopt(struct sock *sk, int level, int optname,
883 char __user *optval, int optlen)
884{
885 struct raw6_sock *rp = raw6_sk(sk);
886 int val;
887
888 switch(level) {
889 case SOL_RAW:
890 break;
891
892 case SOL_ICMPV6:
893 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
894 return -EOPNOTSUPP;
895 return rawv6_seticmpfilter(sk, level, optname, optval,
896 optlen);
897 case SOL_IPV6:
898 if (optname == IPV6_CHECKSUM)
899 break;
900 default:
901 return ipv6_setsockopt(sk, level, optname, optval,
902 optlen);
903 };
904
905 if (get_user(val, (int __user *)optval))
906 return -EFAULT;
907
908 switch (optname) {
909 case IPV6_CHECKSUM:
910 /* You may get strange result with a positive odd offset;
911 RFC2292bis agrees with me. */
912 if (val > 0 && (val&1))
913 return(-EINVAL);
914 if (val < 0) {
915 rp->checksum = 0;
916 } else {
917 rp->checksum = 1;
918 rp->offset = val;
919 }
920
921 return 0;
922 break;
923
924 default:
925 return(-ENOPROTOOPT);
926 }
927}
928
929static int rawv6_getsockopt(struct sock *sk, int level, int optname,
930 char __user *optval, int __user *optlen)
931{
932 struct raw6_sock *rp = raw6_sk(sk);
933 int val, len;
934
935 switch(level) {
936 case SOL_RAW:
937 break;
938
939 case SOL_ICMPV6:
940 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
941 return -EOPNOTSUPP;
942 return rawv6_geticmpfilter(sk, level, optname, optval,
943 optlen);
944 case SOL_IPV6:
945 if (optname == IPV6_CHECKSUM)
946 break;
947 default:
948 return ipv6_getsockopt(sk, level, optname, optval,
949 optlen);
950 };
951
952 if (get_user(len,optlen))
953 return -EFAULT;
954
955 switch (optname) {
956 case IPV6_CHECKSUM:
957 if (rp->checksum == 0)
958 val = -1;
959 else
960 val = rp->offset;
961 break;
962
963 default:
964 return -ENOPROTOOPT;
965 }
966
967 len = min_t(unsigned int, sizeof(int), len);
968
969 if (put_user(len, optlen))
970 return -EFAULT;
971 if (copy_to_user(optval,&val,len))
972 return -EFAULT;
973 return 0;
974}
975
976static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
977{
978 switch(cmd) {
979 case SIOCOUTQ:
980 {
981 int amount = atomic_read(&sk->sk_wmem_alloc);
982 return put_user(amount, (int __user *)arg);
983 }
984 case SIOCINQ:
985 {
986 struct sk_buff *skb;
987 int amount = 0;
988
e0f9f858 989 spin_lock_bh(&sk->sk_receive_queue.lock);
1da177e4
LT		 990 skb = skb_peek(&sk->sk_receive_queue);
991 if (skb != NULL)
992 amount = skb->tail - skb->h.raw;
e0f9f858 993 spin_unlock_bh(&sk->sk_receive_queue.lock);
1da177e4
LT		 994 return put_user(amount, (int __user *)arg);
995 }
996
997 default:
998 return -ENOIOCTLCMD;
999 }
1000}
1001
1002static void rawv6_close(struct sock *sk, long timeout)
1003{
1004 if (inet_sk(sk)->num == IPPROTO_RAW)
1005 ip6_ra_control(sk, -1, NULL);
1006
1007 sk_common_release(sk);
1008}
1009
1010static int rawv6_init_sk(struct sock *sk)
1011{
1012 if (inet_sk(sk)->num == IPPROTO_ICMPV6) {
1013 struct raw6_sock *rp = raw6_sk(sk);
1014 rp->checksum = 1;
1015 rp->offset = 2;
1016 }
1017 return(0);
1018}
1019
1020struct proto rawv6_prot = {
1021 .name = "RAWv6",
1022 .owner = THIS_MODULE,
1023 .close = rawv6_close,
1024 .connect = ip6_datagram_connect,
1025 .disconnect = udp_disconnect,
1026 .ioctl = rawv6_ioctl,
1027 .init = rawv6_init_sk,
1028 .destroy = inet6_destroy_sock,
1029 .setsockopt = rawv6_setsockopt,
1030 .getsockopt = rawv6_getsockopt,
1031 .sendmsg = rawv6_sendmsg,
1032 .recvmsg = rawv6_recvmsg,
1033 .bind = rawv6_bind,
1034 .backlog_rcv = rawv6_rcv_skb,
1035 .hash = raw_v6_hash,
1036 .unhash = raw_v6_unhash,
1037 .obj_size = sizeof(struct raw6_sock),
1038};
1039
1040#ifdef CONFIG_PROC_FS
1041struct raw6_iter_state {
1042 int bucket;
1043};
1044
1045#define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private)
1046
1047static struct sock *raw6_get_first(struct seq_file *seq)
1048{
1049 struct sock *sk;
1050 struct hlist_node *node;
1051 struct raw6_iter_state* state = raw6_seq_private(seq);
1052
1053 for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket)
1054 sk_for_each(sk, node, &raw_v6_htable[state->bucket])
1055 if (sk->sk_family == PF_INET6)
1056 goto out;
1057 sk = NULL;
1058out:
1059 return sk;
1060}
1061
1062static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk)
1063{
1064 struct raw6_iter_state* state = raw6_seq_private(seq);
1065
1066 do {
1067 sk = sk_next(sk);
1068try_again:
1069 ;
1070 } while (sk && sk->sk_family != PF_INET6);
1071
1072 if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) {
1073 sk = sk_head(&raw_v6_htable[state->bucket]);
1074 goto try_again;
1075 }
1076 return sk;
1077}
1078
1079static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos)
1080{
1081 struct sock *sk = raw6_get_first(seq);
1082 if (sk)
1083 while (pos && (sk = raw6_get_next(seq, sk)) != NULL)
1084 --pos;
1085 return pos ? NULL : sk;
1086}
1087
1088static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
1089{
1090 read_lock(&raw_v6_lock);
1091 return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
1092}
1093
1094static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1095{
1096 struct sock *sk;
1097
1098 if (v == SEQ_START_TOKEN)
1099 sk = raw6_get_first(seq);
1100 else
1101 sk = raw6_get_next(seq, v);
1102 ++*pos;
1103 return sk;
1104}
1105
1106static void raw6_seq_stop(struct seq_file *seq, void *v)
1107{
1108 read_unlock(&raw_v6_lock);
1109}
1110
1111static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1112{
1113 struct ipv6_pinfo *np = inet6_sk(sp);
1114 struct in6_addr *dest, *src;
1115 __u16 destp, srcp;
1116
1117 dest = &np->daddr;
1118 src = &np->rcv_saddr;
1119 destp = 0;
1120 srcp = inet_sk(sp)->num;
1121 seq_printf(seq,
1122 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1123 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
1124 i,
1125 src->s6_addr32[0], src->s6_addr32[1],
1126 src->s6_addr32[2], src->s6_addr32[3], srcp,
1127 dest->s6_addr32[0], dest->s6_addr32[1],
1128 dest->s6_addr32[2], dest->s6_addr32[3], destp,
1129 sp->sk_state,
1130 atomic_read(&sp->sk_wmem_alloc),
1131 atomic_read(&sp->sk_rmem_alloc),
1132 0, 0L, 0,
1133 sock_i_uid(sp), 0,
1134 sock_i_ino(sp),
1135 atomic_read(&sp->sk_refcnt), sp);
1136}
1137
1138static int raw6_seq_show(struct seq_file *seq, void *v)
1139{
1140 if (v == SEQ_START_TOKEN)
1141 seq_printf(seq,
1142 " sl "
1143 "local_address "
1144 "remote_address "
1145 "st tx_queue rx_queue tr tm->when retrnsmt"
1146 " uid timeout inode\n");
1147 else
1148 raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket);
1149 return 0;
1150}
1151
1152static struct seq_operations raw6_seq_ops = {
1153 .start = raw6_seq_start,
1154 .next = raw6_seq_next,
1155 .stop = raw6_seq_stop,
1156 .show = raw6_seq_show,
1157};
1158
1159static int raw6_seq_open(struct inode *inode, struct file *file)
1160{
1161 struct seq_file *seq;
1162 int rc = -ENOMEM;
1163 struct raw6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
1164 if (!s)
1165 goto out;
1166 rc = seq_open(file, &raw6_seq_ops);
1167 if (rc)
1168 goto out_kfree;
1169 seq = file->private_data;
1170 seq->private = s;
1171 memset(s, 0, sizeof(*s));
1172out:
1173 return rc;
1174out_kfree:
1175 kfree(s);
1176 goto out;
1177}
1178
1179static struct file_operations raw6_seq_fops = {
1180 .owner = THIS_MODULE,
1181 .open = raw6_seq_open,
1182 .read = seq_read,
1183 .llseek = seq_lseek,
1184 .release = seq_release_private,
1185};
1186
1187int __init raw6_proc_init(void)
1188{
1189 if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops))
1190 return -ENOMEM;
1191 return 0;
1192}
1193
1194void raw6_proc_exit(void)
1195{
1196 proc_net_remove("raw6");
1197}
1198#endif /* CONFIG_PROC_FS */
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