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[NET]: Detect hardware rx checksum faults correctly
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / ipv6 / raw.c
blob8e9628f1c4c5b4bc4f1b858c339950072ad50c7c
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>
37 #include <asm/bug.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 /* Clear queue. */
437 if (flags&MSG_PEEK) {
438 int clear = 0;
439 spin_lock_bh(&sk->sk_receive_queue.lock);
440 if (skb == skb_peek(&sk->sk_receive_queue)) {
441 __skb_unlink(skb, &sk->sk_receive_queue);
442 clear = 1;
443 }
444 spin_unlock_bh(&sk->sk_receive_queue.lock);
445 if (clear)
446 kfree_skb(skb);
447 }
448
449 /* Error for blocking case is chosen to masquerade
450 as some normal condition.
451 */
452 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
453 /* FIXME: increment a raw6 drops counter here */
454 goto out_free;
455 }
456
457 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
458 struct raw6_sock *rp)
459 {
460 struct sk_buff *skb;
461 int err = 0;
462 int offset;
463 int len;
464 int total_len;
465 u32 tmp_csum;
466 u16 csum;
467
468 if (!rp->checksum)
469 goto send;
470
471 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
472 goto out;
473
474 offset = rp->offset;
475 total_len = inet_sk(sk)->cork.length - (skb->nh.raw - skb->data);
476 if (offset >= total_len - 1) {
477 err = -EINVAL;
478 ip6_flush_pending_frames(sk);
479 goto out;
480 }
481
482 /* should be check HW csum miyazawa */
483 if (skb_queue_len(&sk->sk_write_queue) == 1) {
484 /*
485 * Only one fragment on the socket.
486 */
487 tmp_csum = skb->csum;
488 } else {
489 struct sk_buff *csum_skb = NULL;
490 tmp_csum = 0;
491
492 skb_queue_walk(&sk->sk_write_queue, skb) {
493 tmp_csum = csum_add(tmp_csum, skb->csum);
494
495 if (csum_skb)
496 continue;
497
498 len = skb->len - (skb->h.raw - skb->data);
499 if (offset >= len) {
500 offset -= len;
501 continue;
502 }
503
504 csum_skb = skb;
505 }
506
507 skb = csum_skb;
508 }
509
510 offset += skb->h.raw - skb->data;
511 if (skb_copy_bits(skb, offset, &csum, 2))
512 BUG();
513
514 /* in case cksum was not initialized */
515 if (unlikely(csum))
516 tmp_csum = csum_sub(tmp_csum, csum);
517
518 tmp_csum = csum_ipv6_magic(&fl->fl6_src,
519 &fl->fl6_dst,
520 total_len, fl->proto, tmp_csum);
521
522 if (tmp_csum == 0)
523 tmp_csum = -1;
524
525 csum = tmp_csum;
526 if (skb_store_bits(skb, offset, &csum, 2))
527 BUG();
528
529 send:
530 err = ip6_push_pending_frames(sk);
531 out:
532 return err;
533 }
534
535 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
536 struct flowi *fl, struct rt6_info *rt,
537 unsigned int flags)
538 {
539 struct ipv6_pinfo *np = inet6_sk(sk);
540 struct ipv6hdr *iph;
541 struct sk_buff *skb;
542 unsigned int hh_len;
543 int err;
544
545 if (length > rt->u.dst.dev->mtu) {
546 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
547 return -EMSGSIZE;
548 }
549 if (flags&MSG_PROBE)
550 goto out;
551
552 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
553
554 skb = sock_alloc_send_skb(sk, length+hh_len+15,
555 flags&MSG_DONTWAIT, &err);
556 if (skb == NULL)
557 goto error;
558 skb_reserve(skb, hh_len);
559
560 skb->priority = sk->sk_priority;
561 skb->dst = dst_clone(&rt->u.dst);
562
563 skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length);
564
565 skb->ip_summed = CHECKSUM_NONE;
566
567 skb->h.raw = skb->nh.raw;
568 err = memcpy_fromiovecend((void *)iph, from, 0, length);
569 if (err)
570 goto error_fault;
571
572 IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
573 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
574 dst_output);
575 if (err > 0)
576 err = np->recverr ? net_xmit_errno(err) : 0;
577 if (err)
578 goto error;
579 out:
580 return 0;
581
582 error_fault:
583 err = -EFAULT;
584 kfree_skb(skb);
585 error:
586 IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
587 return err;
588 }
589
590 static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
591 {
592 struct iovec *iov;
593 u8 __user *type = NULL;
594 u8 __user *code = NULL;
595 int probed = 0;
596 int i;
597
598 if (!msg->msg_iov)
599 return;
600
601 for (i = 0; i < msg->msg_iovlen; i++) {
602 iov = &msg->msg_iov[i];
603 if (!iov)
604 continue;
605
606 switch (fl->proto) {
607 case IPPROTO_ICMPV6:
608 /* check if one-byte field is readable or not. */
609 if (iov->iov_base && iov->iov_len < 1)
610 break;
611
612 if (!type) {
613 type = iov->iov_base;
614 /* check if code field is readable or not. */
615 if (iov->iov_len > 1)
616 code = type + 1;
617 } else if (!code)
618 code = iov->iov_base;
619
620 if (type && code) {
621 get_user(fl->fl_icmp_type, type);
622 get_user(fl->fl_icmp_code, code);
623 probed = 1;
624 }
625 break;
626 default:
627 probed = 1;
628 break;
629 }
630 if (probed)
631 break;
632 }
633 }
634
635 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
636 struct msghdr *msg, size_t len)
637 {
638 struct ipv6_txoptions opt_space;
639 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
640 struct in6_addr *daddr, *final_p = NULL, final;
641 struct inet_sock *inet = inet_sk(sk);
642 struct ipv6_pinfo *np = inet6_sk(sk);
643 struct raw6_sock *rp = raw6_sk(sk);
644 struct ipv6_txoptions *opt = NULL;
645 struct ip6_flowlabel *flowlabel = NULL;
646 struct dst_entry *dst = NULL;
647 struct flowi fl;
648 int addr_len = msg->msg_namelen;
649 int hlimit = -1;
650 int tclass = -1;
651 u16 proto;
652 int err;
653
654 /* Rough check on arithmetic overflow,
655 better check is made in ip6_build_xmit
656 */
657 if (len < 0)
658 return -EMSGSIZE;
659
660 /* Mirror BSD error message compatibility */
661 if (msg->msg_flags & MSG_OOB)
662 return -EOPNOTSUPP;
663
664 /*
665 * Get and verify the address.
666 */
667 memset(&fl, 0, sizeof(fl));
668
669 if (sin6) {
670 if (addr_len < SIN6_LEN_RFC2133)
671 return -EINVAL;
672
673 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
674 return(-EAFNOSUPPORT);
675
676 /* port is the proto value [0..255] carried in nexthdr */
677 proto = ntohs(sin6->sin6_port);
678
679 if (!proto)
680 proto = inet->num;
681 else if (proto != inet->num)
682 return(-EINVAL);
683
684 if (proto > 255)
685 return(-EINVAL);
686
687 daddr = &sin6->sin6_addr;
688 if (np->sndflow) {
689 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
690 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
691 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
692 if (flowlabel == NULL)
693 return -EINVAL;
694 daddr = &flowlabel->dst;
695 }
696 }
697
698 /*
699 * Otherwise it will be difficult to maintain
700 * sk->sk_dst_cache.
701 */
702 if (sk->sk_state == TCP_ESTABLISHED &&
703 ipv6_addr_equal(daddr, &np->daddr))
704 daddr = &np->daddr;
705
706 if (addr_len >= sizeof(struct sockaddr_in6) &&
707 sin6->sin6_scope_id &&
708 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
709 fl.oif = sin6->sin6_scope_id;
710 } else {
711 if (sk->sk_state != TCP_ESTABLISHED)
712 return -EDESTADDRREQ;
713
714 proto = inet->num;
715 daddr = &np->daddr;
716 fl.fl6_flowlabel = np->flow_label;
717 }
718
719 if (ipv6_addr_any(daddr)) {
720 /*
721 * unspecified destination address
722 * treated as error... is this correct ?
723 */
724 fl6_sock_release(flowlabel);
725 return(-EINVAL);
726 }
727
728 if (fl.oif == 0)
729 fl.oif = sk->sk_bound_dev_if;
730
731 if (msg->msg_controllen) {
732 opt = &opt_space;
733 memset(opt, 0, sizeof(struct ipv6_txoptions));
734 opt->tot_len = sizeof(struct ipv6_txoptions);
735
736 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
737 if (err < 0) {
738 fl6_sock_release(flowlabel);
739 return err;
740 }
741 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
742 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
743 if (flowlabel == NULL)
744 return -EINVAL;
745 }
746 if (!(opt->opt_nflen|opt->opt_flen))
747 opt = NULL;
748 }
749 if (opt == NULL)
750 opt = np->opt;
751 opt = fl6_merge_options(&opt_space, flowlabel, opt);
752
753 fl.proto = proto;
754 rawv6_probe_proto_opt(&fl, msg);
755
756 ipv6_addr_copy(&fl.fl6_dst, daddr);
757 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
758 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
759
760 /* merge ip6_build_xmit from ip6_output */
761 if (opt && opt->srcrt) {
762 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
763 ipv6_addr_copy(&final, &fl.fl6_dst);
764 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
765 final_p = &final;
766 }
767
768 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
769 fl.oif = np->mcast_oif;
770
771 err = ip6_dst_lookup(sk, &dst, &fl);
772 if (err)
773 goto out;
774 if (final_p)
775 ipv6_addr_copy(&fl.fl6_dst, final_p);
776
777 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
778 goto out;
779
780 if (hlimit < 0) {
781 if (ipv6_addr_is_multicast(&fl.fl6_dst))
782 hlimit = np->mcast_hops;
783 else
784 hlimit = np->hop_limit;
785 if (hlimit < 0)
786 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
787 if (hlimit < 0)
788 hlimit = ipv6_get_hoplimit(dst->dev);
789 }
790
791 if (tclass < 0) {
792 tclass = np->cork.tclass;
793 if (tclass < 0)
794 tclass = 0;
795 }
796
797 if (msg->msg_flags&MSG_CONFIRM)
798 goto do_confirm;
799
800 back_from_confirm:
801 if (inet->hdrincl) {
802 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
803 } else {
804 lock_sock(sk);
805 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
806 len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
807 msg->msg_flags);
808
809 if (err)
810 ip6_flush_pending_frames(sk);
811 else if (!(msg->msg_flags & MSG_MORE))
812 err = rawv6_push_pending_frames(sk, &fl, rp);
813 }
814 done:
815 ip6_dst_store(sk, dst,
816 ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
817 &np->daddr : NULL);
818
819 release_sock(sk);
820 out:
821 fl6_sock_release(flowlabel);
822 return err<0?err:len;
823 do_confirm:
824 dst_confirm(dst);
825 if (!(msg->msg_flags & MSG_PROBE) || len)
826 goto back_from_confirm;
827 err = 0;
828 goto done;
829 }
830
831 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
832 char __user *optval, int optlen)
833 {
834 switch (optname) {
835 case ICMPV6_FILTER:
836 if (optlen > sizeof(struct icmp6_filter))
837 optlen = sizeof(struct icmp6_filter);
838 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
839 return -EFAULT;
840 return 0;
841 default:
842 return -ENOPROTOOPT;
843 };
844
845 return 0;
846 }
847
848 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
849 char __user *optval, int __user *optlen)
850 {
851 int len;
852
853 switch (optname) {
854 case ICMPV6_FILTER:
855 if (get_user(len, optlen))
856 return -EFAULT;
857 if (len < 0)
858 return -EINVAL;
859 if (len > sizeof(struct icmp6_filter))
860 len = sizeof(struct icmp6_filter);
861 if (put_user(len, optlen))
862 return -EFAULT;
863 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
864 return -EFAULT;
865 return 0;
866 default:
867 return -ENOPROTOOPT;
868 };
869
870 return 0;
871 }
872
873
874 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
875 char __user *optval, int optlen)
876 {
877 struct raw6_sock *rp = raw6_sk(sk);
878 int val;
879
880 switch(level) {
881 case SOL_RAW:
882 break;
883
884 case SOL_ICMPV6:
885 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
886 return -EOPNOTSUPP;
887 return rawv6_seticmpfilter(sk, level, optname, optval,
888 optlen);
889 case SOL_IPV6:
890 if (optname == IPV6_CHECKSUM)
891 break;
892 default:
893 return ipv6_setsockopt(sk, level, optname, optval,
894 optlen);
895 };
896
897 if (get_user(val, (int __user *)optval))
898 return -EFAULT;
899
900 switch (optname) {
901 case IPV6_CHECKSUM:
902 /* You may get strange result with a positive odd offset;
903 RFC2292bis agrees with me. */
904 if (val > 0 && (val&1))
905 return(-EINVAL);
906 if (val < 0) {
907 rp->checksum = 0;
908 } else {
909 rp->checksum = 1;
910 rp->offset = val;
911 }
912
913 return 0;
914 break;
915
916 default:
917 return(-ENOPROTOOPT);
918 }
919 }
920
921 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
922 char __user *optval, int __user *optlen)
923 {
924 struct raw6_sock *rp = raw6_sk(sk);
925 int val, len;
926
927 switch(level) {
928 case SOL_RAW:
929 break;
930
931 case SOL_ICMPV6:
932 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
933 return -EOPNOTSUPP;
934 return rawv6_geticmpfilter(sk, level, optname, optval,
935 optlen);
936 case SOL_IPV6:
937 if (optname == IPV6_CHECKSUM)
938 break;
939 default:
940 return ipv6_getsockopt(sk, level, optname, optval,
941 optlen);
942 };
943
944 if (get_user(len,optlen))
945 return -EFAULT;
946
947 switch (optname) {
948 case IPV6_CHECKSUM:
949 if (rp->checksum == 0)
950 val = -1;
951 else
952 val = rp->offset;
953 break;
954
955 default:
956 return -ENOPROTOOPT;
957 }
958
959 len = min_t(unsigned int, sizeof(int), len);
960
961 if (put_user(len, optlen))
962 return -EFAULT;
963 if (copy_to_user(optval,&val,len))
964 return -EFAULT;
965 return 0;
966 }
967
968 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
969 {
970 switch(cmd) {
971 case SIOCOUTQ:
972 {
973 int amount = atomic_read(&sk->sk_wmem_alloc);
974 return put_user(amount, (int __user *)arg);
975 }
976 case SIOCINQ:
977 {
978 struct sk_buff *skb;
979 int amount = 0;
980
981 spin_lock_bh(&sk->sk_receive_queue.lock);
982 skb = skb_peek(&sk->sk_receive_queue);
983 if (skb != NULL)
984 amount = skb->tail - skb->h.raw;
985 spin_unlock_bh(&sk->sk_receive_queue.lock);
986 return put_user(amount, (int __user *)arg);
987 }
988
989 default:
990 return -ENOIOCTLCMD;
991 }
992 }
993
994 static void rawv6_close(struct sock *sk, long timeout)
995 {
996 if (inet_sk(sk)->num == IPPROTO_RAW)
997 ip6_ra_control(sk, -1, NULL);
998
999 sk_common_release(sk);
1000 }
1001
1002 static int rawv6_init_sk(struct sock *sk)
1003 {
1004 if (inet_sk(sk)->num == IPPROTO_ICMPV6) {
1005 struct raw6_sock *rp = raw6_sk(sk);
1006 rp->checksum = 1;
1007 rp->offset = 2;
1008 }
1009 return(0);
1010 }
1011
1012 struct proto rawv6_prot = {
1013 .name = "RAWv6",
1014 .owner = THIS_MODULE,
1015 .close = rawv6_close,
1016 .connect = ip6_datagram_connect,
1017 .disconnect = udp_disconnect,
1018 .ioctl = rawv6_ioctl,
1019 .init = rawv6_init_sk,
1020 .destroy = inet6_destroy_sock,
1021 .setsockopt = rawv6_setsockopt,
1022 .getsockopt = rawv6_getsockopt,
1023 .sendmsg = rawv6_sendmsg,
1024 .recvmsg = rawv6_recvmsg,
1025 .bind = rawv6_bind,
1026 .backlog_rcv = rawv6_rcv_skb,
1027 .hash = raw_v6_hash,
1028 .unhash = raw_v6_unhash,
1029 .obj_size = sizeof(struct raw6_sock),
1030 };
1031
1032 #ifdef CONFIG_PROC_FS
1033 struct raw6_iter_state {
1034 int bucket;
1035 };
1036
1037 #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private)
1038
1039 static struct sock *raw6_get_first(struct seq_file *seq)
1040 {
1041 struct sock *sk;
1042 struct hlist_node *node;
1043 struct raw6_iter_state* state = raw6_seq_private(seq);
1044
1045 for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket)
1046 sk_for_each(sk, node, &raw_v6_htable[state->bucket])
1047 if (sk->sk_family == PF_INET6)
1048 goto out;
1049 sk = NULL;
1050 out:
1051 return sk;
1052 }
1053
1054 static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk)
1055 {
1056 struct raw6_iter_state* state = raw6_seq_private(seq);
1057
1058 do {
1059 sk = sk_next(sk);
1060 try_again:
1061 ;
1062 } while (sk && sk->sk_family != PF_INET6);
1063
1064 if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) {
1065 sk = sk_head(&raw_v6_htable[state->bucket]);
1066 goto try_again;
1067 }
1068 return sk;
1069 }
1070
1071 static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos)
1072 {
1073 struct sock *sk = raw6_get_first(seq);
1074 if (sk)
1075 while (pos && (sk = raw6_get_next(seq, sk)) != NULL)
1076 --pos;
1077 return pos ? NULL : sk;
1078 }
1079
1080 static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
1081 {
1082 read_lock(&raw_v6_lock);
1083 return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
1084 }
1085
1086 static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1087 {
1088 struct sock *sk;
1089
1090 if (v == SEQ_START_TOKEN)
1091 sk = raw6_get_first(seq);
1092 else
1093 sk = raw6_get_next(seq, v);
1094 ++*pos;
1095 return sk;
1096 }
1097
1098 static void raw6_seq_stop(struct seq_file *seq, void *v)
1099 {
1100 read_unlock(&raw_v6_lock);
1101 }
1102
1103 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1104 {
1105 struct ipv6_pinfo *np = inet6_sk(sp);
1106 struct in6_addr *dest, *src;
1107 __u16 destp, srcp;
1108
1109 dest = &np->daddr;
1110 src = &np->rcv_saddr;
1111 destp = 0;
1112 srcp = inet_sk(sp)->num;
1113 seq_printf(seq,
1114 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1115 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
1116 i,
1117 src->s6_addr32[0], src->s6_addr32[1],
1118 src->s6_addr32[2], src->s6_addr32[3], srcp,
1119 dest->s6_addr32[0], dest->s6_addr32[1],
1120 dest->s6_addr32[2], dest->s6_addr32[3], destp,
1121 sp->sk_state,
1122 atomic_read(&sp->sk_wmem_alloc),
1123 atomic_read(&sp->sk_rmem_alloc),
1124 0, 0L, 0,
1125 sock_i_uid(sp), 0,
1126 sock_i_ino(sp),
1127 atomic_read(&sp->sk_refcnt), sp);
1128 }
1129
1130 static int raw6_seq_show(struct seq_file *seq, void *v)
1131 {
1132 if (v == SEQ_START_TOKEN)
1133 seq_printf(seq,
1134 " sl "
1135 "local_address "
1136 "remote_address "
1137 "st tx_queue rx_queue tr tm->when retrnsmt"
1138 " uid timeout inode\n");
1139 else
1140 raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket);
1141 return 0;
1142 }
1143
1144 static struct seq_operations raw6_seq_ops = {
1145 .start = raw6_seq_start,
1146 .next = raw6_seq_next,
1147 .stop = raw6_seq_stop,
1148 .show = raw6_seq_show,
1149 };
1150
1151 static int raw6_seq_open(struct inode *inode, struct file *file)
1152 {
1153 struct seq_file *seq;
1154 int rc = -ENOMEM;
1155 struct raw6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
1156 if (!s)
1157 goto out;
1158 rc = seq_open(file, &raw6_seq_ops);
1159 if (rc)
1160 goto out_kfree;
1161 seq = file->private_data;
1162 seq->private = s;
1163 memset(s, 0, sizeof(*s));
1164 out:
1165 return rc;
1166 out_kfree:
1167 kfree(s);
1168 goto out;
1169 }
1170
1171 static struct file_operations raw6_seq_fops = {
1172 .owner = THIS_MODULE,
1173 .open = raw6_seq_open,
1174 .read = seq_read,
1175 .llseek = seq_lseek,
1176 .release = seq_release_private,
1177 };
1178
1179 int __init raw6_proc_init(void)
1180 {
1181 if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops))
1182 return -ENOMEM;
1183 return 0;
1184 }
1185
1186 void raw6_proc_exit(void)
1187 {
1188 proc_net_remove("raw6");
1189 }
1190 #endif /* CONFIG_PROC_FS */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree