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[PATCH] w1: Userspace communication protocol over connector.
[linux-2.6/verdex.git] / net / ipv6 / raw.c
blobfa1ce0ae123ed0d855d9db3cfb44c380cb668058
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 <linux/skbuff.h>
36 #include <asm/uaccess.h>
37 #include <asm/ioctls.h>
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>
52 #include <net/tcp_states.h>
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
60 struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
61 DEFINE_RWLOCK(raw_v6_lock);
62
63 static 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
74 static 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... */
84 struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
85 struct in6_addr *loc_addr, struct in6_addr *rmt_addr,
86 int dif)
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
99 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
100 continue;
101
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;
113 found:
114 return sk;
115 }
116
117 /*
118 * 0 - deliver
119 * 1 - block
120 */
121 static __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 */
145 int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
146 {
147 struct in6_addr *saddr;
148 struct in6_addr *daddr;
149 struct sock *sk;
150 int delivered = 0;
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
169 sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
170
171 while (sk) {
172 delivered = 1;
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 nf_reset(clone);
179 rawv6_rcv(sk, clone);
180 }
181 }
182 sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr,
183 IP6CB(skb)->iif);
184 }
185 out:
186 read_unlock(&raw_v6_lock);
187 return delivered;
188 }
189
190 /* This cleans up af_inet6 a bit. -DaveM */
191 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
192 {
193 struct inet_sock *inet = inet_sk(sk);
194 struct ipv6_pinfo *np = inet6_sk(sk);
195 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
196 __u32 v4addr = 0;
197 int addr_type;
198 int err;
199
200 if (addr_len < SIN6_LEN_RFC2133)
201 return -EINVAL;
202 addr_type = ipv6_addr_type(&addr->sin6_addr);
203
204 /* Raw sockets are IPv6 only */
205 if (addr_type == IPV6_ADDR_MAPPED)
206 return(-EADDRNOTAVAIL);
207
208 lock_sock(sk);
209
210 err = -EINVAL;
211 if (sk->sk_state != TCP_CLOSE)
212 goto out;
213
214 /* Check if the address belongs to the host. */
215 if (addr_type != IPV6_ADDR_ANY) {
216 struct net_device *dev = NULL;
217
218 if (addr_type & IPV6_ADDR_LINKLOCAL) {
219 if (addr_len >= sizeof(struct sockaddr_in6) &&
220 addr->sin6_scope_id) {
221 /* Override any existing binding, if another
222 * one is supplied by user.
223 */
224 sk->sk_bound_dev_if = addr->sin6_scope_id;
225 }
226
227 /* Binding to link-local address requires an interface */
228 if (!sk->sk_bound_dev_if)
229 goto out;
230
231 dev = dev_get_by_index(sk->sk_bound_dev_if);
232 if (!dev) {
233 err = -ENODEV;
234 goto out;
235 }
236 }
237
238 /* ipv4 addr of the socket is invalid. Only the
239 * unspecified and mapped address have a v4 equivalent.
240 */
241 v4addr = LOOPBACK4_IPV6;
242 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
243 err = -EADDRNOTAVAIL;
244 if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
245 if (dev)
246 dev_put(dev);
247 goto out;
248 }
249 }
250 if (dev)
251 dev_put(dev);
252 }
253
254 inet->rcv_saddr = inet->saddr = v4addr;
255 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
256 if (!(addr_type & IPV6_ADDR_MULTICAST))
257 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
258 err = 0;
259 out:
260 release_sock(sk);
261 return err;
262 }
263
264 void rawv6_err(struct sock *sk, struct sk_buff *skb,
265 struct inet6_skb_parm *opt,
266 int type, int code, int offset, u32 info)
267 {
268 struct inet_sock *inet = inet_sk(sk);
269 struct ipv6_pinfo *np = inet6_sk(sk);
270 int err;
271 int harderr;
272
273 /* Report error on raw socket, if:
274 1. User requested recverr.
275 2. Socket is connected (otherwise the error indication
276 is useless without recverr and error is hard.
277 */
278 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
279 return;
280
281 harderr = icmpv6_err_convert(type, code, &err);
282 if (type == ICMPV6_PKT_TOOBIG)
283 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
284
285 if (np->recverr) {
286 u8 *payload = skb->data;
287 if (!inet->hdrincl)
288 payload += offset;
289 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
290 }
291
292 if (np->recverr || harderr) {
293 sk->sk_err = err;
294 sk->sk_error_report(sk);
295 }
296 }
297
298 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
299 {
300 if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
301 skb_checksum_complete(skb)) {
302 /* FIXME: increment a raw6 drops counter here */
303 kfree_skb(skb);
304 return 0;
305 }
306
307 /* Charge it to the socket. */
308 if (sock_queue_rcv_skb(sk,skb)<0) {
309 /* FIXME: increment a raw6 drops counter here */
310 kfree_skb(skb);
311 return 0;
312 }
313
314 return 0;
315 }
316
317 /*
318 * This is next to useless...
319 * if we demultiplex in network layer we don't need the extra call
320 * just to queue the skb...
321 * maybe we could have the network decide upon a hint if it
322 * should call raw_rcv for demultiplexing
323 */
324 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
325 {
326 struct inet_sock *inet = inet_sk(sk);
327 struct raw6_sock *rp = raw6_sk(sk);
328
329 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
330 kfree_skb(skb);
331 return NET_RX_DROP;
332 }
333
334 if (!rp->checksum)
335 skb->ip_summed = CHECKSUM_UNNECESSARY;
336
337 if (skb->ip_summed == CHECKSUM_HW) {
338 skb_postpull_rcsum(skb, skb->nh.raw,
339 skb->h.raw - skb->nh.raw);
340 if (!csum_ipv6_magic(&skb->nh.ipv6h->saddr,
341 &skb->nh.ipv6h->daddr,
342 skb->len, inet->num, skb->csum))
343 skb->ip_summed = CHECKSUM_UNNECESSARY;
344 }
345 if (skb->ip_summed != CHECKSUM_UNNECESSARY)
346 skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
347 &skb->nh.ipv6h->daddr,
348 skb->len, inet->num, 0);
349
350 if (inet->hdrincl) {
351 if (skb_checksum_complete(skb)) {
352 /* FIXME: increment a raw6 drops counter here */
353 kfree_skb(skb);
354 return 0;
355 }
356 }
357
358 rawv6_rcv_skb(sk, skb);
359 return 0;
360 }
361
362
363 /*
364 * This should be easy, if there is something there
365 * we return it, otherwise we block.
366 */
367
368 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
369 struct msghdr *msg, size_t len,
370 int noblock, int flags, int *addr_len)
371 {
372 struct ipv6_pinfo *np = inet6_sk(sk);
373 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
374 struct sk_buff *skb;
375 size_t copied;
376 int err;
377
378 if (flags & MSG_OOB)
379 return -EOPNOTSUPP;
380
381 if (addr_len)
382 *addr_len=sizeof(*sin6);
383
384 if (flags & MSG_ERRQUEUE)
385 return ipv6_recv_error(sk, msg, len);
386
387 skb = skb_recv_datagram(sk, flags, noblock, &err);
388 if (!skb)
389 goto out;
390
391 copied = skb->len;
392 if (copied > len) {
393 copied = len;
394 msg->msg_flags |= MSG_TRUNC;
395 }
396
397 if (skb->ip_summed==CHECKSUM_UNNECESSARY) {
398 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
399 } else if (msg->msg_flags&MSG_TRUNC) {
400 if (__skb_checksum_complete(skb))
401 goto csum_copy_err;
402 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
403 } else {
404 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
405 if (err == -EINVAL)
406 goto csum_copy_err;
407 }
408 if (err)
409 goto out_free;
410
411 /* Copy the address. */
412 if (sin6) {
413 sin6->sin6_family = AF_INET6;
414 ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr);
415 sin6->sin6_flowinfo = 0;
416 sin6->sin6_scope_id = 0;
417 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
418 sin6->sin6_scope_id = IP6CB(skb)->iif;
419 }
420
421 sock_recv_timestamp(msg, sk, skb);
422
423 if (np->rxopt.all)
424 datagram_recv_ctl(sk, msg, skb);
425
426 err = copied;
427 if (flags & MSG_TRUNC)
428 err = skb->len;
429
430 out_free:
431 skb_free_datagram(sk, skb);
432 out:
433 return err;
434
435 csum_copy_err:
436 skb_kill_datagram(sk, skb, flags);
437
438 /* Error for blocking case is chosen to masquerade
439 as some normal condition.
440 */
441 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
442 /* FIXME: increment a raw6 drops counter here */
443 goto out;
444 }
445
446 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
447 struct raw6_sock *rp)
448 {
449 struct sk_buff *skb;
450 int err = 0;
451 int offset;
452 int len;
453 int total_len;
454 u32 tmp_csum;
455 u16 csum;
456
457 if (!rp->checksum)
458 goto send;
459
460 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
461 goto out;
462
463 offset = rp->offset;
464 total_len = inet_sk(sk)->cork.length - (skb->nh.raw - skb->data);
465 if (offset >= total_len - 1) {
466 err = -EINVAL;
467 ip6_flush_pending_frames(sk);
468 goto out;
469 }
470
471 /* should be check HW csum miyazawa */
472 if (skb_queue_len(&sk->sk_write_queue) == 1) {
473 /*
474 * Only one fragment on the socket.
475 */
476 tmp_csum = skb->csum;
477 } else {
478 struct sk_buff *csum_skb = NULL;
479 tmp_csum = 0;
480
481 skb_queue_walk(&sk->sk_write_queue, skb) {
482 tmp_csum = csum_add(tmp_csum, skb->csum);
483
484 if (csum_skb)
485 continue;
486
487 len = skb->len - (skb->h.raw - skb->data);
488 if (offset >= len) {
489 offset -= len;
490 continue;
491 }
492
493 csum_skb = skb;
494 }
495
496 skb = csum_skb;
497 }
498
499 offset += skb->h.raw - skb->data;
500 if (skb_copy_bits(skb, offset, &csum, 2))
501 BUG();
502
503 /* in case cksum was not initialized */
504 if (unlikely(csum))
505 tmp_csum = csum_sub(tmp_csum, csum);
506
507 tmp_csum = csum_ipv6_magic(&fl->fl6_src,
508 &fl->fl6_dst,
509 total_len, fl->proto, tmp_csum);
510
511 if (tmp_csum == 0)
512 tmp_csum = -1;
513
514 csum = tmp_csum;
515 if (skb_store_bits(skb, offset, &csum, 2))
516 BUG();
517
518 send:
519 err = ip6_push_pending_frames(sk);
520 out:
521 return err;
522 }
523
524 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
525 struct flowi *fl, struct rt6_info *rt,
526 unsigned int flags)
527 {
528 struct ipv6_pinfo *np = inet6_sk(sk);
529 struct ipv6hdr *iph;
530 struct sk_buff *skb;
531 unsigned int hh_len;
532 int err;
533
534 if (length > rt->u.dst.dev->mtu) {
535 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
536 return -EMSGSIZE;
537 }
538 if (flags&MSG_PROBE)
539 goto out;
540
541 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
542
543 skb = sock_alloc_send_skb(sk, length+hh_len+15,
544 flags&MSG_DONTWAIT, &err);
545 if (skb == NULL)
546 goto error;
547 skb_reserve(skb, hh_len);
548
549 skb->priority = sk->sk_priority;
550 skb->dst = dst_clone(&rt->u.dst);
551
552 skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length);
553
554 skb->ip_summed = CHECKSUM_NONE;
555
556 skb->h.raw = skb->nh.raw;
557 err = memcpy_fromiovecend((void *)iph, from, 0, length);
558 if (err)
559 goto error_fault;
560
561 IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
562 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
563 dst_output);
564 if (err > 0)
565 err = np->recverr ? net_xmit_errno(err) : 0;
566 if (err)
567 goto error;
568 out:
569 return 0;
570
571 error_fault:
572 err = -EFAULT;
573 kfree_skb(skb);
574 error:
575 IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
576 return err;
577 }
578
579 static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
580 {
581 struct iovec *iov;
582 u8 __user *type = NULL;
583 u8 __user *code = NULL;
584 int probed = 0;
585 int i;
586
587 if (!msg->msg_iov)
588 return;
589
590 for (i = 0; i < msg->msg_iovlen; i++) {
591 iov = &msg->msg_iov[i];
592 if (!iov)
593 continue;
594
595 switch (fl->proto) {
596 case IPPROTO_ICMPV6:
597 /* check if one-byte field is readable or not. */
598 if (iov->iov_base && iov->iov_len < 1)
599 break;
600
601 if (!type) {
602 type = iov->iov_base;
603 /* check if code field is readable or not. */
604 if (iov->iov_len > 1)
605 code = type + 1;
606 } else if (!code)
607 code = iov->iov_base;
608
609 if (type && code) {
610 get_user(fl->fl_icmp_type, type);
611 get_user(fl->fl_icmp_code, code);
612 probed = 1;
613 }
614 break;
615 default:
616 probed = 1;
617 break;
618 }
619 if (probed)
620 break;
621 }
622 }
623
624 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
625 struct msghdr *msg, size_t len)
626 {
627 struct ipv6_txoptions opt_space;
628 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
629 struct in6_addr *daddr, *final_p = NULL, final;
630 struct inet_sock *inet = inet_sk(sk);
631 struct ipv6_pinfo *np = inet6_sk(sk);
632 struct raw6_sock *rp = raw6_sk(sk);
633 struct ipv6_txoptions *opt = NULL;
634 struct ip6_flowlabel *flowlabel = NULL;
635 struct dst_entry *dst = NULL;
636 struct flowi fl;
637 int addr_len = msg->msg_namelen;
638 int hlimit = -1;
639 int tclass = -1;
640 u16 proto;
641 int err;
642
643 /* Rough check on arithmetic overflow,
644 better check is made in ip6_build_xmit
645 */
646 if (len < 0)
647 return -EMSGSIZE;
648
649 /* Mirror BSD error message compatibility */
650 if (msg->msg_flags & MSG_OOB)
651 return -EOPNOTSUPP;
652
653 /*
654 * Get and verify the address.
655 */
656 memset(&fl, 0, sizeof(fl));
657
658 if (sin6) {
659 if (addr_len < SIN6_LEN_RFC2133)
660 return -EINVAL;
661
662 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
663 return(-EAFNOSUPPORT);
664
665 /* port is the proto value [0..255] carried in nexthdr */
666 proto = ntohs(sin6->sin6_port);
667
668 if (!proto)
669 proto = inet->num;
670 else if (proto != inet->num)
671 return(-EINVAL);
672
673 if (proto > 255)
674 return(-EINVAL);
675
676 daddr = &sin6->sin6_addr;
677 if (np->sndflow) {
678 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
679 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
680 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
681 if (flowlabel == NULL)
682 return -EINVAL;
683 daddr = &flowlabel->dst;
684 }
685 }
686
687 /*
688 * Otherwise it will be difficult to maintain
689 * sk->sk_dst_cache.
690 */
691 if (sk->sk_state == TCP_ESTABLISHED &&
692 ipv6_addr_equal(daddr, &np->daddr))
693 daddr = &np->daddr;
694
695 if (addr_len >= sizeof(struct sockaddr_in6) &&
696 sin6->sin6_scope_id &&
697 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
698 fl.oif = sin6->sin6_scope_id;
699 } else {
700 if (sk->sk_state != TCP_ESTABLISHED)
701 return -EDESTADDRREQ;
702
703 proto = inet->num;
704 daddr = &np->daddr;
705 fl.fl6_flowlabel = np->flow_label;
706 }
707
708 if (ipv6_addr_any(daddr)) {
709 /*
710 * unspecified destination address
711 * treated as error... is this correct ?
712 */
713 fl6_sock_release(flowlabel);
714 return(-EINVAL);
715 }
716
717 if (fl.oif == 0)
718 fl.oif = sk->sk_bound_dev_if;
719
720 if (msg->msg_controllen) {
721 opt = &opt_space;
722 memset(opt, 0, sizeof(struct ipv6_txoptions));
723 opt->tot_len = sizeof(struct ipv6_txoptions);
724
725 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
726 if (err < 0) {
727 fl6_sock_release(flowlabel);
728 return err;
729 }
730 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
731 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
732 if (flowlabel == NULL)
733 return -EINVAL;
734 }
735 if (!(opt->opt_nflen|opt->opt_flen))
736 opt = NULL;
737 }
738 if (opt == NULL)
739 opt = np->opt;
740 if (flowlabel)
741 opt = fl6_merge_options(&opt_space, flowlabel, opt);
742 opt = ipv6_fixup_options(&opt_space, opt);
743
744 fl.proto = proto;
745 rawv6_probe_proto_opt(&fl, msg);
746
747 ipv6_addr_copy(&fl.fl6_dst, daddr);
748 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
749 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
750
751 /* merge ip6_build_xmit from ip6_output */
752 if (opt && opt->srcrt) {
753 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
754 ipv6_addr_copy(&final, &fl.fl6_dst);
755 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
756 final_p = &final;
757 }
758
759 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
760 fl.oif = np->mcast_oif;
761
762 err = ip6_dst_lookup(sk, &dst, &fl);
763 if (err)
764 goto out;
765 if (final_p)
766 ipv6_addr_copy(&fl.fl6_dst, final_p);
767
768 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
769 goto out;
770
771 if (hlimit < 0) {
772 if (ipv6_addr_is_multicast(&fl.fl6_dst))
773 hlimit = np->mcast_hops;
774 else
775 hlimit = np->hop_limit;
776 if (hlimit < 0)
777 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
778 if (hlimit < 0)
779 hlimit = ipv6_get_hoplimit(dst->dev);
780 }
781
782 if (tclass < 0) {
783 tclass = np->cork.tclass;
784 if (tclass < 0)
785 tclass = 0;
786 }
787
788 if (msg->msg_flags&MSG_CONFIRM)
789 goto do_confirm;
790
791 back_from_confirm:
792 if (inet->hdrincl) {
793 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
794 } else {
795 lock_sock(sk);
796 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
797 len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
798 msg->msg_flags);
799
800 if (err)
801 ip6_flush_pending_frames(sk);
802 else if (!(msg->msg_flags & MSG_MORE))
803 err = rawv6_push_pending_frames(sk, &fl, rp);
804 }
805 done:
806 dst_release(dst);
807 release_sock(sk);
808 out:
809 fl6_sock_release(flowlabel);
810 return err<0?err:len;
811 do_confirm:
812 dst_confirm(dst);
813 if (!(msg->msg_flags & MSG_PROBE) || len)
814 goto back_from_confirm;
815 err = 0;
816 goto done;
817 }
818
819 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
820 char __user *optval, int optlen)
821 {
822 switch (optname) {
823 case ICMPV6_FILTER:
824 if (optlen > sizeof(struct icmp6_filter))
825 optlen = sizeof(struct icmp6_filter);
826 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
827 return -EFAULT;
828 return 0;
829 default:
830 return -ENOPROTOOPT;
831 };
832
833 return 0;
834 }
835
836 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
837 char __user *optval, int __user *optlen)
838 {
839 int len;
840
841 switch (optname) {
842 case ICMPV6_FILTER:
843 if (get_user(len, optlen))
844 return -EFAULT;
845 if (len < 0)
846 return -EINVAL;
847 if (len > sizeof(struct icmp6_filter))
848 len = sizeof(struct icmp6_filter);
849 if (put_user(len, optlen))
850 return -EFAULT;
851 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
852 return -EFAULT;
853 return 0;
854 default:
855 return -ENOPROTOOPT;
856 };
857
858 return 0;
859 }
860
861
862 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
863 char __user *optval, int optlen)
864 {
865 struct raw6_sock *rp = raw6_sk(sk);
866 int val;
867
868 if (get_user(val, (int __user *)optval))
869 return -EFAULT;
870
871 switch (optname) {
872 case IPV6_CHECKSUM:
873 /* You may get strange result with a positive odd offset;
874 RFC2292bis agrees with me. */
875 if (val > 0 && (val&1))
876 return(-EINVAL);
877 if (val < 0) {
878 rp->checksum = 0;
879 } else {
880 rp->checksum = 1;
881 rp->offset = val;
882 }
883
884 return 0;
885 break;
886
887 default:
888 return(-ENOPROTOOPT);
889 }
890 }
891
892 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
893 char __user *optval, int optlen)
894 {
895 switch(level) {
896 case SOL_RAW:
897 break;
898
899 case SOL_ICMPV6:
900 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
901 return -EOPNOTSUPP;
902 return rawv6_seticmpfilter(sk, level, optname, optval,
903 optlen);
904 case SOL_IPV6:
905 if (optname == IPV6_CHECKSUM)
906 break;
907 default:
908 return ipv6_setsockopt(sk, level, optname, optval,
909 optlen);
910 };
911 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
912 }
913
914 #ifdef CONFIG_COMPAT
915 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
916 char __user *optval, int optlen)
917 {
918 switch (level) {
919 case SOL_RAW:
920 break;
921 case SOL_ICMPV6:
922 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
923 return -EOPNOTSUPP;
924 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
925 case SOL_IPV6:
926 if (optname == IPV6_CHECKSUM)
927 break;
928 default:
929 return compat_ipv6_setsockopt(sk, level, optname,
930 optval, optlen);
931 };
932 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
933 }
934 #endif
935
936 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
937 char __user *optval, int __user *optlen)
938 {
939 struct raw6_sock *rp = raw6_sk(sk);
940 int val, len;
941
942 if (get_user(len,optlen))
943 return -EFAULT;
944
945 switch (optname) {
946 case IPV6_CHECKSUM:
947 if (rp->checksum == 0)
948 val = -1;
949 else
950 val = rp->offset;
951 break;
952
953 default:
954 return -ENOPROTOOPT;
955 }
956
957 len = min_t(unsigned int, sizeof(int), len);
958
959 if (put_user(len, optlen))
960 return -EFAULT;
961 if (copy_to_user(optval,&val,len))
962 return -EFAULT;
963 return 0;
964 }
965
966 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
967 char __user *optval, int __user *optlen)
968 {
969 switch(level) {
970 case SOL_RAW:
971 break;
972
973 case SOL_ICMPV6:
974 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
975 return -EOPNOTSUPP;
976 return rawv6_geticmpfilter(sk, level, optname, optval,
977 optlen);
978 case SOL_IPV6:
979 if (optname == IPV6_CHECKSUM)
980 break;
981 default:
982 return ipv6_getsockopt(sk, level, optname, optval,
983 optlen);
984 };
985 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
986 }
987
988 #ifdef CONFIG_COMPAT
989 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
990 char __user *optval, int __user *optlen)
991 {
992 switch (level) {
993 case SOL_RAW:
994 break;
995 case SOL_ICMPV6:
996 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
997 return -EOPNOTSUPP;
998 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
999 case SOL_IPV6:
1000 if (optname == IPV6_CHECKSUM)
1001 break;
1002 default:
1003 return compat_ipv6_getsockopt(sk, level, optname,
1004 optval, optlen);
1005 };
1006 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1007 }
1008 #endif
1009
1010 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1011 {
1012 switch(cmd) {
1013 case SIOCOUTQ:
1014 {
1015 int amount = atomic_read(&sk->sk_wmem_alloc);
1016 return put_user(amount, (int __user *)arg);
1017 }
1018 case SIOCINQ:
1019 {
1020 struct sk_buff *skb;
1021 int amount = 0;
1022
1023 spin_lock_bh(&sk->sk_receive_queue.lock);
1024 skb = skb_peek(&sk->sk_receive_queue);
1025 if (skb != NULL)
1026 amount = skb->tail - skb->h.raw;
1027 spin_unlock_bh(&sk->sk_receive_queue.lock);
1028 return put_user(amount, (int __user *)arg);
1029 }
1030
1031 default:
1032 return -ENOIOCTLCMD;
1033 }
1034 }
1035
1036 static void rawv6_close(struct sock *sk, long timeout)
1037 {
1038 if (inet_sk(sk)->num == IPPROTO_RAW)
1039 ip6_ra_control(sk, -1, NULL);
1040
1041 sk_common_release(sk);
1042 }
1043
1044 static int rawv6_init_sk(struct sock *sk)
1045 {
1046 if (inet_sk(sk)->num == IPPROTO_ICMPV6) {
1047 struct raw6_sock *rp = raw6_sk(sk);
1048 rp->checksum = 1;
1049 rp->offset = 2;
1050 }
1051 return(0);
1052 }
1053
1054 struct proto rawv6_prot = {
1055 .name = "RAWv6",
1056 .owner = THIS_MODULE,
1057 .close = rawv6_close,
1058 .connect = ip6_datagram_connect,
1059 .disconnect = udp_disconnect,
1060 .ioctl = rawv6_ioctl,
1061 .init = rawv6_init_sk,
1062 .destroy = inet6_destroy_sock,
1063 .setsockopt = rawv6_setsockopt,
1064 .getsockopt = rawv6_getsockopt,
1065 .sendmsg = rawv6_sendmsg,
1066 .recvmsg = rawv6_recvmsg,
1067 .bind = rawv6_bind,
1068 .backlog_rcv = rawv6_rcv_skb,
1069 .hash = raw_v6_hash,
1070 .unhash = raw_v6_unhash,
1071 .obj_size = sizeof(struct raw6_sock),
1072 #ifdef CONFIG_COMPAT
1073 .compat_setsockopt = compat_rawv6_setsockopt,
1074 .compat_getsockopt = compat_rawv6_getsockopt,
1075 #endif
1076 };
1077
1078 #ifdef CONFIG_PROC_FS
1079 struct raw6_iter_state {
1080 int bucket;
1081 };
1082
1083 #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private)
1084
1085 static struct sock *raw6_get_first(struct seq_file *seq)
1086 {
1087 struct sock *sk;
1088 struct hlist_node *node;
1089 struct raw6_iter_state* state = raw6_seq_private(seq);
1090
1091 for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket)
1092 sk_for_each(sk, node, &raw_v6_htable[state->bucket])
1093 if (sk->sk_family == PF_INET6)
1094 goto out;
1095 sk = NULL;
1096 out:
1097 return sk;
1098 }
1099
1100 static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk)
1101 {
1102 struct raw6_iter_state* state = raw6_seq_private(seq);
1103
1104 do {
1105 sk = sk_next(sk);
1106 try_again:
1107 ;
1108 } while (sk && sk->sk_family != PF_INET6);
1109
1110 if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) {
1111 sk = sk_head(&raw_v6_htable[state->bucket]);
1112 goto try_again;
1113 }
1114 return sk;
1115 }
1116
1117 static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos)
1118 {
1119 struct sock *sk = raw6_get_first(seq);
1120 if (sk)
1121 while (pos && (sk = raw6_get_next(seq, sk)) != NULL)
1122 --pos;
1123 return pos ? NULL : sk;
1124 }
1125
1126 static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
1127 {
1128 read_lock(&raw_v6_lock);
1129 return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
1130 }
1131
1132 static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1133 {
1134 struct sock *sk;
1135
1136 if (v == SEQ_START_TOKEN)
1137 sk = raw6_get_first(seq);
1138 else
1139 sk = raw6_get_next(seq, v);
1140 ++*pos;
1141 return sk;
1142 }
1143
1144 static void raw6_seq_stop(struct seq_file *seq, void *v)
1145 {
1146 read_unlock(&raw_v6_lock);
1147 }
1148
1149 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1150 {
1151 struct ipv6_pinfo *np = inet6_sk(sp);
1152 struct in6_addr *dest, *src;
1153 __u16 destp, srcp;
1154
1155 dest = &np->daddr;
1156 src = &np->rcv_saddr;
1157 destp = 0;
1158 srcp = inet_sk(sp)->num;
1159 seq_printf(seq,
1160 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1161 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
1162 i,
1163 src->s6_addr32[0], src->s6_addr32[1],
1164 src->s6_addr32[2], src->s6_addr32[3], srcp,
1165 dest->s6_addr32[0], dest->s6_addr32[1],
1166 dest->s6_addr32[2], dest->s6_addr32[3], destp,
1167 sp->sk_state,
1168 atomic_read(&sp->sk_wmem_alloc),
1169 atomic_read(&sp->sk_rmem_alloc),
1170 0, 0L, 0,
1171 sock_i_uid(sp), 0,
1172 sock_i_ino(sp),
1173 atomic_read(&sp->sk_refcnt), sp);
1174 }
1175
1176 static int raw6_seq_show(struct seq_file *seq, void *v)
1177 {
1178 if (v == SEQ_START_TOKEN)
1179 seq_printf(seq,
1180 " sl "
1181 "local_address "
1182 "remote_address "
1183 "st tx_queue rx_queue tr tm->when retrnsmt"
1184 " uid timeout inode\n");
1185 else
1186 raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket);
1187 return 0;
1188 }
1189
1190 static struct seq_operations raw6_seq_ops = {
1191 .start = raw6_seq_start,
1192 .next = raw6_seq_next,
1193 .stop = raw6_seq_stop,
1194 .show = raw6_seq_show,
1195 };
1196
1197 static int raw6_seq_open(struct inode *inode, struct file *file)
1198 {
1199 struct seq_file *seq;
1200 int rc = -ENOMEM;
1201 struct raw6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
1202 if (!s)
1203 goto out;
1204 rc = seq_open(file, &raw6_seq_ops);
1205 if (rc)
1206 goto out_kfree;
1207 seq = file->private_data;
1208 seq->private = s;
1209 out:
1210 return rc;
1211 out_kfree:
1212 kfree(s);
1213 goto out;
1214 }
1215
1216 static struct file_operations raw6_seq_fops = {
1217 .owner = THIS_MODULE,
1218 .open = raw6_seq_open,
1219 .read = seq_read,
1220 .llseek = seq_lseek,
1221 .release = seq_release_private,
1222 };
1223
1224 int __init raw6_proc_init(void)
1225 {
1226 if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops))
1227 return -ENOMEM;
1228 return 0;
1229 }
1230
1231 void raw6_proc_exit(void)
1232 {
1233 proc_net_remove("raw6");
1234 }
1235 #endif /* CONFIG_PROC_FS */
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