?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ipv6: udp: fix the wrong headroom check
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / ipv6 / udp.c
blob9cc6289acaedb235ee93187ec95b8845d202f888
1 /*
2 * UDP over IPv6
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Based on linux/ipv4/udp.c
9 *
10 * Fixes:
11 * Hideaki YOSHIFUJI : sin6_scope_id support
12 * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which
13 * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind
14 * a single port at the same time.
15 * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
16 * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file.
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 */
23
24 #include <linux/errno.h>
25 #include <linux/types.h>
26 #include <linux/socket.h>
27 #include <linux/sockios.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/ipv6.h>
33 #include <linux/icmpv6.h>
34 #include <linux/init.h>
35 #include <linux/module.h>
36 #include <linux/skbuff.h>
37 #include <asm/uaccess.h>
38
39 #include <net/ndisc.h>
40 #include <net/protocol.h>
41 #include <net/transp_v6.h>
42 #include <net/ip6_route.h>
43 #include <net/raw.h>
44 #include <net/tcp_states.h>
45 #include <net/ip6_checksum.h>
46 #include <net/xfrm.h>
47
48 #include <linux/proc_fs.h>
49 #include <linux/seq_file.h>
50 #include "udp_impl.h"
51
52 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
53 {
54 const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
55 const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
56 __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
57 __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
58 int sk_ipv6only = ipv6_only_sock(sk);
59 int sk2_ipv6only = inet_v6_ipv6only(sk2);
60 int addr_type = ipv6_addr_type(sk_rcv_saddr6);
61 int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
62
63 /* if both are mapped, treat as IPv4 */
64 if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED)
65 return (!sk2_ipv6only &&
66 (!sk_rcv_saddr || !sk2_rcv_saddr ||
67 sk_rcv_saddr == sk2_rcv_saddr));
68
69 if (addr_type2 == IPV6_ADDR_ANY &&
70 !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
71 return 1;
72
73 if (addr_type == IPV6_ADDR_ANY &&
74 !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
75 return 1;
76
77 if (sk2_rcv_saddr6 &&
78 ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
79 return 1;
80
81 return 0;
82 }
83
84 int udp_v6_get_port(struct sock *sk, unsigned short snum)
85 {
86 return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal);
87 }
88
89 static inline int compute_score(struct sock *sk, struct net *net,
90 unsigned short hnum,
91 struct in6_addr *saddr, __be16 sport,
92 struct in6_addr *daddr, __be16 dport,
93 int dif)
94 {
95 int score = -1;
96
97 if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum &&
98 sk->sk_family == PF_INET6) {
99 struct ipv6_pinfo *np = inet6_sk(sk);
100 struct inet_sock *inet = inet_sk(sk);
101
102 score = 0;
103 if (inet->dport) {
104 if (inet->dport != sport)
105 return -1;
106 score++;
107 }
108 if (!ipv6_addr_any(&np->rcv_saddr)) {
109 if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
110 return -1;
111 score++;
112 }
113 if (!ipv6_addr_any(&np->daddr)) {
114 if (!ipv6_addr_equal(&np->daddr, saddr))
115 return -1;
116 score++;
117 }
118 if (sk->sk_bound_dev_if) {
119 if (sk->sk_bound_dev_if != dif)
120 return -1;
121 score++;
122 }
123 }
124 return score;
125 }
126
127 static struct sock *__udp6_lib_lookup(struct net *net,
128 struct in6_addr *saddr, __be16 sport,
129 struct in6_addr *daddr, __be16 dport,
130 int dif, struct udp_table *udptable)
131 {
132 struct sock *sk, *result;
133 struct hlist_nulls_node *node;
134 unsigned short hnum = ntohs(dport);
135 unsigned int hash = udp_hashfn(net, hnum);
136 struct udp_hslot *hslot = &udptable->hash[hash];
137 int score, badness;
138
139 rcu_read_lock();
140 begin:
141 result = NULL;
142 badness = -1;
143 sk_nulls_for_each_rcu(sk, node, &hslot->head) {
144 score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif);
145 if (score > badness) {
146 result = sk;
147 badness = score;
148 }
149 }
150 /*
151 * if the nulls value we got at the end of this lookup is
152 * not the expected one, we must restart lookup.
153 * We probably met an item that was moved to another chain.
154 */
155 if (get_nulls_value(node) != hash)
156 goto begin;
157
158 if (result) {
159 if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt)))
160 result = NULL;
161 else if (unlikely(compute_score(result, net, hnum, saddr, sport,
162 daddr, dport, dif) < badness)) {
163 sock_put(result);
164 goto begin;
165 }
166 }
167 rcu_read_unlock();
168 return result;
169 }
170
171 static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
172 __be16 sport, __be16 dport,
173 struct udp_table *udptable)
174 {
175 struct sock *sk;
176 struct ipv6hdr *iph = ipv6_hdr(skb);
177
178 if (unlikely(sk = skb_steal_sock(skb)))
179 return sk;
180 return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport,
181 &iph->daddr, dport, inet6_iif(skb),
182 udptable);
183 }
184
185 /*
186 * This should be easy, if there is something there we
187 * return it, otherwise we block.
188 */
189
190 int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
191 struct msghdr *msg, size_t len,
192 int noblock, int flags, int *addr_len)
193 {
194 struct ipv6_pinfo *np = inet6_sk(sk);
195 struct inet_sock *inet = inet_sk(sk);
196 struct sk_buff *skb;
197 unsigned int ulen, copied;
198 int peeked;
199 int err;
200 int is_udplite = IS_UDPLITE(sk);
201 int is_udp4;
202
203 if (addr_len)
204 *addr_len=sizeof(struct sockaddr_in6);
205
206 if (flags & MSG_ERRQUEUE)
207 return ipv6_recv_error(sk, msg, len);
208
209 try_again:
210 skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0),
211 &peeked, &err);
212 if (!skb)
213 goto out;
214
215 ulen = skb->len - sizeof(struct udphdr);
216 copied = len;
217 if (copied > ulen)
218 copied = ulen;
219 else if (copied < ulen)
220 msg->msg_flags |= MSG_TRUNC;
221
222 is_udp4 = (skb->protocol == htons(ETH_P_IP));
223
224 /*
225 * If checksum is needed at all, try to do it while copying the
226 * data. If the data is truncated, or if we only want a partial
227 * coverage checksum (UDP-Lite), do it before the copy.
228 */
229
230 if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
231 if (udp_lib_checksum_complete(skb))
232 goto csum_copy_err;
233 }
234
235 if (skb_csum_unnecessary(skb))
236 err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
237 msg->msg_iov, copied );
238 else {
239 err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
240 if (err == -EINVAL)
241 goto csum_copy_err;
242 }
243 if (err)
244 goto out_free;
245
246 if (!peeked) {
247 if (is_udp4)
248 UDP_INC_STATS_USER(sock_net(sk),
249 UDP_MIB_INDATAGRAMS, is_udplite);
250 else
251 UDP6_INC_STATS_USER(sock_net(sk),
252 UDP_MIB_INDATAGRAMS, is_udplite);
253 }
254
255 sock_recv_timestamp(msg, sk, skb);
256
257 /* Copy the address. */
258 if (msg->msg_name) {
259 struct sockaddr_in6 *sin6;
260
261 sin6 = (struct sockaddr_in6 *) msg->msg_name;
262 sin6->sin6_family = AF_INET6;
263 sin6->sin6_port = udp_hdr(skb)->source;
264 sin6->sin6_flowinfo = 0;
265 sin6->sin6_scope_id = 0;
266
267 if (is_udp4)
268 ipv6_addr_set(&sin6->sin6_addr, 0, 0,
269 htonl(0xffff), ip_hdr(skb)->saddr);
270 else {
271 ipv6_addr_copy(&sin6->sin6_addr,
272 &ipv6_hdr(skb)->saddr);
273 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
274 sin6->sin6_scope_id = IP6CB(skb)->iif;
275 }
276
277 }
278 if (is_udp4) {
279 if (inet->cmsg_flags)
280 ip_cmsg_recv(msg, skb);
281 } else {
282 if (np->rxopt.all)
283 datagram_recv_ctl(sk, msg, skb);
284 }
285
286 err = copied;
287 if (flags & MSG_TRUNC)
288 err = ulen;
289
290 out_free:
291 skb_free_datagram_locked(sk, skb);
292 out:
293 return err;
294
295 csum_copy_err:
296 lock_sock(sk);
297 if (!skb_kill_datagram(sk, skb, flags)) {
298 if (is_udp4)
299 UDP_INC_STATS_USER(sock_net(sk),
300 UDP_MIB_INERRORS, is_udplite);
301 else
302 UDP6_INC_STATS_USER(sock_net(sk),
303 UDP_MIB_INERRORS, is_udplite);
304 }
305 release_sock(sk);
306
307 if (noblock)
308 return -EAGAIN;
309
310 /* starting over for a new packet */
311 msg->msg_flags &= ~MSG_TRUNC;
312 goto try_again;
313 }
314
315 void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
316 u8 type, u8 code, int offset, __be32 info,
317 struct udp_table *udptable)
318 {
319 struct ipv6_pinfo *np;
320 struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
321 struct in6_addr *saddr = &hdr->saddr;
322 struct in6_addr *daddr = &hdr->daddr;
323 struct udphdr *uh = (struct udphdr*)(skb->data+offset);
324 struct sock *sk;
325 int err;
326
327 sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest,
328 saddr, uh->source, inet6_iif(skb), udptable);
329 if (sk == NULL)
330 return;
331
332 np = inet6_sk(sk);
333
334 if (!icmpv6_err_convert(type, code, &err) && !np->recverr)
335 goto out;
336
337 if (sk->sk_state != TCP_ESTABLISHED && !np->recverr)
338 goto out;
339
340 if (np->recverr)
341 ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
342
343 sk->sk_err = err;
344 sk->sk_error_report(sk);
345 out:
346 sock_put(sk);
347 }
348
349 static __inline__ void udpv6_err(struct sk_buff *skb,
350 struct inet6_skb_parm *opt, u8 type,
351 u8 code, int offset, __be32 info )
352 {
353 __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table);
354 }
355
356 int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
357 {
358 struct udp_sock *up = udp_sk(sk);
359 int rc;
360 int is_udplite = IS_UDPLITE(sk);
361
362 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
363 goto drop;
364
365 /*
366 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
367 */
368 if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) {
369
370 if (up->pcrlen == 0) { /* full coverage was set */
371 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage"
372 " %d while full coverage %d requested\n",
373 UDP_SKB_CB(skb)->cscov, skb->len);
374 goto drop;
375 }
376 if (UDP_SKB_CB(skb)->cscov < up->pcrlen) {
377 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d "
378 "too small, need min %d\n",
379 UDP_SKB_CB(skb)->cscov, up->pcrlen);
380 goto drop;
381 }
382 }
383
384 if (sk->sk_filter) {
385 if (udp_lib_checksum_complete(skb))
386 goto drop;
387 }
388
389 if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
390 /* Note that an ENOMEM error is charged twice */
391 if (rc == -ENOMEM) {
392 UDP6_INC_STATS_BH(sock_net(sk),
393 UDP_MIB_RCVBUFERRORS, is_udplite);
394 atomic_inc(&sk->sk_drops);
395 }
396 goto drop;
397 }
398
399 return 0;
400 drop:
401 UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
402 kfree_skb(skb);
403 return -1;
404 }
405
406 static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk,
407 __be16 loc_port, struct in6_addr *loc_addr,
408 __be16 rmt_port, struct in6_addr *rmt_addr,
409 int dif)
410 {
411 struct hlist_nulls_node *node;
412 struct sock *s = sk;
413 unsigned short num = ntohs(loc_port);
414
415 sk_nulls_for_each_from(s, node) {
416 struct inet_sock *inet = inet_sk(s);
417
418 if (!net_eq(sock_net(s), net))
419 continue;
420
421 if (s->sk_hash == num && s->sk_family == PF_INET6) {
422 struct ipv6_pinfo *np = inet6_sk(s);
423 if (inet->dport) {
424 if (inet->dport != rmt_port)
425 continue;
426 }
427 if (!ipv6_addr_any(&np->daddr) &&
428 !ipv6_addr_equal(&np->daddr, rmt_addr))
429 continue;
430
431 if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif)
432 continue;
433
434 if (!ipv6_addr_any(&np->rcv_saddr)) {
435 if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
436 continue;
437 }
438 if (!inet6_mc_check(s, loc_addr, rmt_addr))
439 continue;
440 return s;
441 }
442 }
443 return NULL;
444 }
445
446 /*
447 * Note: called only from the BH handler context,
448 * so we don't need to lock the hashes.
449 */
450 static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
451 struct in6_addr *saddr, struct in6_addr *daddr,
452 struct udp_table *udptable)
453 {
454 struct sock *sk, *sk2;
455 const struct udphdr *uh = udp_hdr(skb);
456 struct udp_hslot *hslot = &udptable->hash[udp_hashfn(net, ntohs(uh->dest))];
457 int dif;
458
459 spin_lock(&hslot->lock);
460 sk = sk_nulls_head(&hslot->head);
461 dif = inet6_iif(skb);
462 sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif);
463 if (!sk) {
464 kfree_skb(skb);
465 goto out;
466 }
467
468 sk2 = sk;
469 while ((sk2 = udp_v6_mcast_next(net, sk_nulls_next(sk2), uh->dest, daddr,
470 uh->source, saddr, dif))) {
471 struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
472 if (buff) {
473 bh_lock_sock(sk2);
474 if (!sock_owned_by_user(sk2))
475 udpv6_queue_rcv_skb(sk2, buff);
476 else
477 sk_add_backlog(sk2, buff);
478 bh_unlock_sock(sk2);
479 }
480 }
481 bh_lock_sock(sk);
482 if (!sock_owned_by_user(sk))
483 udpv6_queue_rcv_skb(sk, skb);
484 else
485 sk_add_backlog(sk, skb);
486 bh_unlock_sock(sk);
487 out:
488 spin_unlock(&hslot->lock);
489 return 0;
490 }
491
492 static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
493 int proto)
494 {
495 int err;
496
497 UDP_SKB_CB(skb)->partial_cov = 0;
498 UDP_SKB_CB(skb)->cscov = skb->len;
499
500 if (proto == IPPROTO_UDPLITE) {
501 err = udplite_checksum_init(skb, uh);
502 if (err)
503 return err;
504 }
505
506 if (uh->check == 0) {
507 /* RFC 2460 section 8.1 says that we SHOULD log
508 this error. Well, it is reasonable.
509 */
510 LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
511 return 1;
512 }
513 if (skb->ip_summed == CHECKSUM_COMPLETE &&
514 !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
515 skb->len, proto, skb->csum))
516 skb->ip_summed = CHECKSUM_UNNECESSARY;
517
518 if (!skb_csum_unnecessary(skb))
519 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
520 &ipv6_hdr(skb)->daddr,
521 skb->len, proto, 0));
522
523 return 0;
524 }
525
526 int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
527 int proto)
528 {
529 struct sock *sk;
530 struct udphdr *uh;
531 struct net_device *dev = skb->dev;
532 struct in6_addr *saddr, *daddr;
533 u32 ulen = 0;
534 struct net *net = dev_net(skb->dev);
535
536 if (!pskb_may_pull(skb, sizeof(struct udphdr)))
537 goto short_packet;
538
539 saddr = &ipv6_hdr(skb)->saddr;
540 daddr = &ipv6_hdr(skb)->daddr;
541 uh = udp_hdr(skb);
542
543 ulen = ntohs(uh->len);
544 if (ulen > skb->len)
545 goto short_packet;
546
547 if (proto == IPPROTO_UDP) {
548 /* UDP validates ulen. */
549
550 /* Check for jumbo payload */
551 if (ulen == 0)
552 ulen = skb->len;
553
554 if (ulen < sizeof(*uh))
555 goto short_packet;
556
557 if (ulen < skb->len) {
558 if (pskb_trim_rcsum(skb, ulen))
559 goto short_packet;
560 saddr = &ipv6_hdr(skb)->saddr;
561 daddr = &ipv6_hdr(skb)->daddr;
562 uh = udp_hdr(skb);
563 }
564 }
565
566 if (udp6_csum_init(skb, uh, proto))
567 goto discard;
568
569 /*
570 * Multicast receive code
571 */
572 if (ipv6_addr_is_multicast(daddr))
573 return __udp6_lib_mcast_deliver(net, skb,
574 saddr, daddr, udptable);
575
576 /* Unicast */
577
578 /*
579 * check socket cache ... must talk to Alan about his plans
580 * for sock caches... i'll skip this for now.
581 */
582 sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable);
583
584 if (sk == NULL) {
585 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
586 goto discard;
587
588 if (udp_lib_checksum_complete(skb))
589 goto discard;
590 UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS,
591 proto == IPPROTO_UDPLITE);
592
593 icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
594
595 kfree_skb(skb);
596 return 0;
597 }
598
599 /* deliver */
600
601 bh_lock_sock(sk);
602 if (!sock_owned_by_user(sk))
603 udpv6_queue_rcv_skb(sk, skb);
604 else
605 sk_add_backlog(sk, skb);
606 bh_unlock_sock(sk);
607 sock_put(sk);
608 return 0;
609
610 short_packet:
611 LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
612 proto == IPPROTO_UDPLITE ? "-Lite" : "",
613 ulen, skb->len);
614
615 discard:
616 UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
617 kfree_skb(skb);
618 return 0;
619 }
620
621 static __inline__ int udpv6_rcv(struct sk_buff *skb)
622 {
623 return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP);
624 }
625
626 /*
627 * Throw away all pending data and cancel the corking. Socket is locked.
628 */
629 static void udp_v6_flush_pending_frames(struct sock *sk)
630 {
631 struct udp_sock *up = udp_sk(sk);
632
633 if (up->pending == AF_INET)
634 udp_flush_pending_frames(sk);
635 else if (up->pending) {
636 up->len = 0;
637 up->pending = 0;
638 ip6_flush_pending_frames(sk);
639 }
640 }
641
642 /**
643 * udp6_hwcsum_outgoing - handle outgoing HW checksumming
644 * @sk: socket we are sending on
645 * @skb: sk_buff containing the filled-in UDP header
646 * (checksum field must be zeroed out)
647 */
648 static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb,
649 const struct in6_addr *saddr,
650 const struct in6_addr *daddr, int len)
651 {
652 unsigned int offset;
653 struct udphdr *uh = udp_hdr(skb);
654 __wsum csum = 0;
655
656 if (skb_queue_len(&sk->sk_write_queue) == 1) {
657 /* Only one fragment on the socket. */
658 skb->csum_start = skb_transport_header(skb) - skb->head;
659 skb->csum_offset = offsetof(struct udphdr, check);
660 uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0);
661 } else {
662 /*
663 * HW-checksum won't work as there are two or more
664 * fragments on the socket so that all csums of sk_buffs
665 * should be together
666 */
667 offset = skb_transport_offset(skb);
668 skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
669
670 skb->ip_summed = CHECKSUM_NONE;
671
672 skb_queue_walk(&sk->sk_write_queue, skb) {
673 csum = csum_add(csum, skb->csum);
674 }
675
676 uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP,
677 csum);
678 if (uh->check == 0)
679 uh->check = CSUM_MANGLED_0;
680 }
681 }
682
683 /*
684 * Sending
685 */
686
687 static int udp_v6_push_pending_frames(struct sock *sk)
688 {
689 struct sk_buff *skb;
690 struct udphdr *uh;
691 struct udp_sock *up = udp_sk(sk);
692 struct inet_sock *inet = inet_sk(sk);
693 struct flowi *fl = &inet->cork.fl;
694 int err = 0;
695 int is_udplite = IS_UDPLITE(sk);
696 __wsum csum = 0;
697
698 /* Grab the skbuff where UDP header space exists. */
699 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
700 goto out;
701
702 /*
703 * Create a UDP header
704 */
705 uh = udp_hdr(skb);
706 uh->source = fl->fl_ip_sport;
707 uh->dest = fl->fl_ip_dport;
708 uh->len = htons(up->len);
709 uh->check = 0;
710
711 if (is_udplite)
712 csum = udplite_csum_outgoing(sk, skb);
713 else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */
714 udp6_hwcsum_outgoing(sk, skb, &fl->fl6_src, &fl->fl6_dst,
715 up->len);
716 goto send;
717 } else
718 csum = udp_csum_outgoing(sk, skb);
719
720 /* add protocol-dependent pseudo-header */
721 uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst,
722 up->len, fl->proto, csum );
723 if (uh->check == 0)
724 uh->check = CSUM_MANGLED_0;
725
726 send:
727 err = ip6_push_pending_frames(sk);
728 if (err) {
729 if (err == -ENOBUFS && !inet6_sk(sk)->recverr) {
730 UDP6_INC_STATS_USER(sock_net(sk),
731 UDP_MIB_SNDBUFERRORS, is_udplite);
732 err = 0;
733 }
734 } else
735 UDP6_INC_STATS_USER(sock_net(sk),
736 UDP_MIB_OUTDATAGRAMS, is_udplite);
737 out:
738 up->len = 0;
739 up->pending = 0;
740 return err;
741 }
742
743 int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
744 struct msghdr *msg, size_t len)
745 {
746 struct ipv6_txoptions opt_space;
747 struct udp_sock *up = udp_sk(sk);
748 struct inet_sock *inet = inet_sk(sk);
749 struct ipv6_pinfo *np = inet6_sk(sk);
750 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
751 struct in6_addr *daddr, *final_p = NULL, final;
752 struct ipv6_txoptions *opt = NULL;
753 struct ip6_flowlabel *flowlabel = NULL;
754 struct flowi fl;
755 struct dst_entry *dst;
756 int addr_len = msg->msg_namelen;
757 int ulen = len;
758 int hlimit = -1;
759 int tclass = -1;
760 int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
761 int err;
762 int connected = 0;
763 int is_udplite = IS_UDPLITE(sk);
764 int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
765
766 /* destination address check */
767 if (sin6) {
768 if (addr_len < offsetof(struct sockaddr, sa_data))
769 return -EINVAL;
770
771 switch (sin6->sin6_family) {
772 case AF_INET6:
773 if (addr_len < SIN6_LEN_RFC2133)
774 return -EINVAL;
775 daddr = &sin6->sin6_addr;
776 break;
777 case AF_INET:
778 goto do_udp_sendmsg;
779 case AF_UNSPEC:
780 msg->msg_name = sin6 = NULL;
781 msg->msg_namelen = addr_len = 0;
782 daddr = NULL;
783 break;
784 default:
785 return -EINVAL;
786 }
787 } else if (!up->pending) {
788 if (sk->sk_state != TCP_ESTABLISHED)
789 return -EDESTADDRREQ;
790 daddr = &np->daddr;
791 } else
792 daddr = NULL;
793
794 if (daddr) {
795 if (ipv6_addr_v4mapped(daddr)) {
796 struct sockaddr_in sin;
797 sin.sin_family = AF_INET;
798 sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;
799 sin.sin_addr.s_addr = daddr->s6_addr32[3];
800 msg->msg_name = &sin;
801 msg->msg_namelen = sizeof(sin);
802 do_udp_sendmsg:
803 if (__ipv6_only_sock(sk))
804 return -ENETUNREACH;
805 return udp_sendmsg(iocb, sk, msg, len);
806 }
807 }
808
809 if (up->pending == AF_INET)
810 return udp_sendmsg(iocb, sk, msg, len);
811
812 /* Rough check on arithmetic overflow,
813 better check is made in ip6_append_data().
814 */
815 if (len > INT_MAX - sizeof(struct udphdr))
816 return -EMSGSIZE;
817
818 if (up->pending) {
819 /*
820 * There are pending frames.
821 * The socket lock must be held while it's corked.
822 */
823 lock_sock(sk);
824 if (likely(up->pending)) {
825 if (unlikely(up->pending != AF_INET6)) {
826 release_sock(sk);
827 return -EAFNOSUPPORT;
828 }
829 dst = NULL;
830 goto do_append_data;
831 }
832 release_sock(sk);
833 }
834 ulen += sizeof(struct udphdr);
835
836 memset(&fl, 0, sizeof(fl));
837
838 if (sin6) {
839 if (sin6->sin6_port == 0)
840 return -EINVAL;
841
842 fl.fl_ip_dport = sin6->sin6_port;
843 daddr = &sin6->sin6_addr;
844
845 if (np->sndflow) {
846 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
847 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
848 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
849 if (flowlabel == NULL)
850 return -EINVAL;
851 daddr = &flowlabel->dst;
852 }
853 }
854
855 /*
856 * Otherwise it will be difficult to maintain
857 * sk->sk_dst_cache.
858 */
859 if (sk->sk_state == TCP_ESTABLISHED &&
860 ipv6_addr_equal(daddr, &np->daddr))
861 daddr = &np->daddr;
862
863 if (addr_len >= sizeof(struct sockaddr_in6) &&
864 sin6->sin6_scope_id &&
865 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
866 fl.oif = sin6->sin6_scope_id;
867 } else {
868 if (sk->sk_state != TCP_ESTABLISHED)
869 return -EDESTADDRREQ;
870
871 fl.fl_ip_dport = inet->dport;
872 daddr = &np->daddr;
873 fl.fl6_flowlabel = np->flow_label;
874 connected = 1;
875 }
876
877 if (!fl.oif)
878 fl.oif = sk->sk_bound_dev_if;
879
880 if (!fl.oif)
881 fl.oif = np->sticky_pktinfo.ipi6_ifindex;
882
883 if (msg->msg_controllen) {
884 opt = &opt_space;
885 memset(opt, 0, sizeof(struct ipv6_txoptions));
886 opt->tot_len = sizeof(*opt);
887
888 err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass);
889 if (err < 0) {
890 fl6_sock_release(flowlabel);
891 return err;
892 }
893 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
894 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
895 if (flowlabel == NULL)
896 return -EINVAL;
897 }
898 if (!(opt->opt_nflen|opt->opt_flen))
899 opt = NULL;
900 connected = 0;
901 }
902 if (opt == NULL)
903 opt = np->opt;
904 if (flowlabel)
905 opt = fl6_merge_options(&opt_space, flowlabel, opt);
906 opt = ipv6_fixup_options(&opt_space, opt);
907
908 fl.proto = sk->sk_protocol;
909 if (!ipv6_addr_any(daddr))
910 ipv6_addr_copy(&fl.fl6_dst, daddr);
911 else
912 fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
913 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
914 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
915 fl.fl_ip_sport = inet->sport;
916
917 /* merge ip6_build_xmit from ip6_output */
918 if (opt && opt->srcrt) {
919 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
920 ipv6_addr_copy(&final, &fl.fl6_dst);
921 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
922 final_p = &final;
923 connected = 0;
924 }
925
926 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
927 fl.oif = np->mcast_oif;
928 connected = 0;
929 }
930
931 security_sk_classify_flow(sk, &fl);
932
933 err = ip6_sk_dst_lookup(sk, &dst, &fl);
934 if (err)
935 goto out;
936 if (final_p)
937 ipv6_addr_copy(&fl.fl6_dst, final_p);
938
939 err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT);
940 if (err < 0) {
941 if (err == -EREMOTE)
942 err = ip6_dst_blackhole(sk, &dst, &fl);
943 if (err < 0)
944 goto out;
945 }
946
947 if (hlimit < 0) {
948 if (ipv6_addr_is_multicast(&fl.fl6_dst))
949 hlimit = np->mcast_hops;
950 else
951 hlimit = np->hop_limit;
952 if (hlimit < 0)
953 hlimit = ip6_dst_hoplimit(dst);
954 }
955
956 if (tclass < 0)
957 tclass = np->tclass;
958
959 if (msg->msg_flags&MSG_CONFIRM)
960 goto do_confirm;
961 back_from_confirm:
962
963 lock_sock(sk);
964 if (unlikely(up->pending)) {
965 /* The socket is already corked while preparing it. */
966 /* ... which is an evident application bug. --ANK */
967 release_sock(sk);
968
969 LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
970 err = -EINVAL;
971 goto out;
972 }
973
974 up->pending = AF_INET6;
975
976 do_append_data:
977 up->len += ulen;
978 getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
979 err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,
980 sizeof(struct udphdr), hlimit, tclass, opt, &fl,
981 (struct rt6_info*)dst,
982 corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
983 if (err)
984 udp_v6_flush_pending_frames(sk);
985 else if (!corkreq)
986 err = udp_v6_push_pending_frames(sk);
987 else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
988 up->pending = 0;
989
990 if (dst) {
991 if (connected) {
992 ip6_dst_store(sk, dst,
993 ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
994 &np->daddr : NULL,
995 #ifdef CONFIG_IPV6_SUBTREES
996 ipv6_addr_equal(&fl.fl6_src, &np->saddr) ?
997 &np->saddr :
998 #endif
999 NULL);
1000 } else {
1001 dst_release(dst);
1002 }
1003 dst = NULL;
1004 }
1005
1006 if (err > 0)
1007 err = np->recverr ? net_xmit_errno(err) : 0;
1008 release_sock(sk);
1009 out:
1010 dst_release(dst);
1011 fl6_sock_release(flowlabel);
1012 if (!err)
1013 return len;
1014 /*
1015 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
1016 * ENOBUFS might not be good (it's not tunable per se), but otherwise
1017 * we don't have a good statistic (IpOutDiscards but it can be too many
1018 * things). We could add another new stat but at least for now that
1019 * seems like overkill.
1020 */
1021 if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
1022 UDP6_INC_STATS_USER(sock_net(sk),
1023 UDP_MIB_SNDBUFERRORS, is_udplite);
1024 }
1025 return err;
1026
1027 do_confirm:
1028 dst_confirm(dst);
1029 if (!(msg->msg_flags&MSG_PROBE) || len)
1030 goto back_from_confirm;
1031 err = 0;
1032 goto out;
1033 }
1034
1035 void udpv6_destroy_sock(struct sock *sk)
1036 {
1037 lock_sock(sk);
1038 udp_v6_flush_pending_frames(sk);
1039 release_sock(sk);
1040
1041 inet6_destroy_sock(sk);
1042 }
1043
1044 /*
1045 * Socket option code for UDP
1046 */
1047 int udpv6_setsockopt(struct sock *sk, int level, int optname,
1048 char __user *optval, unsigned int optlen)
1049 {
1050 if (level == SOL_UDP || level == SOL_UDPLITE)
1051 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
1052 udp_v6_push_pending_frames);
1053 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1054 }
1055
1056 #ifdef CONFIG_COMPAT
1057 int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
1058 char __user *optval, unsigned int optlen)
1059 {
1060 if (level == SOL_UDP || level == SOL_UDPLITE)
1061 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
1062 udp_v6_push_pending_frames);
1063 return compat_ipv6_setsockopt(sk, level, optname, optval, optlen);
1064 }
1065 #endif
1066
1067 int udpv6_getsockopt(struct sock *sk, int level, int optname,
1068 char __user *optval, int __user *optlen)
1069 {
1070 if (level == SOL_UDP || level == SOL_UDPLITE)
1071 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
1072 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1073 }
1074
1075 #ifdef CONFIG_COMPAT
1076 int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
1077 char __user *optval, int __user *optlen)
1078 {
1079 if (level == SOL_UDP || level == SOL_UDPLITE)
1080 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
1081 return compat_ipv6_getsockopt(sk, level, optname, optval, optlen);
1082 }
1083 #endif
1084
1085 static int udp6_ufo_send_check(struct sk_buff *skb)
1086 {
1087 struct ipv6hdr *ipv6h;
1088 struct udphdr *uh;
1089
1090 if (!pskb_may_pull(skb, sizeof(*uh)))
1091 return -EINVAL;
1092
1093 ipv6h = ipv6_hdr(skb);
1094 uh = udp_hdr(skb);
1095
1096 uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len,
1097 IPPROTO_UDP, 0);
1098 skb->csum_start = skb_transport_header(skb) - skb->head;
1099 skb->csum_offset = offsetof(struct udphdr, check);
1100 skb->ip_summed = CHECKSUM_PARTIAL;
1101 return 0;
1102 }
1103
1104 static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, int features)
1105 {
1106 struct sk_buff *segs = ERR_PTR(-EINVAL);
1107 unsigned int mss;
1108 unsigned int unfrag_ip6hlen, unfrag_len;
1109 struct frag_hdr *fptr;
1110 u8 *mac_start, *prevhdr;
1111 u8 nexthdr;
1112 u8 frag_hdr_sz = sizeof(struct frag_hdr);
1113 int offset;
1114 __wsum csum;
1115
1116 mss = skb_shinfo(skb)->gso_size;
1117 if (unlikely(skb->len <= mss))
1118 goto out;
1119
1120 if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) {
1121 /* Packet is from an untrusted source, reset gso_segs. */
1122 int type = skb_shinfo(skb)->gso_type;
1123
1124 if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) ||
1125 !(type & (SKB_GSO_UDP))))
1126 goto out;
1127
1128 skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss);
1129
1130 segs = NULL;
1131 goto out;
1132 }
1133
1134 /* Do software UFO. Complete and fill in the UDP checksum as HW cannot
1135 * do checksum of UDP packets sent as multiple IP fragments.
1136 */
1137 offset = skb->csum_start - skb_headroom(skb);
1138 csum = skb_checksum(skb, offset, skb->len- offset, 0);
1139 offset += skb->csum_offset;
1140 *(__sum16 *)(skb->data + offset) = csum_fold(csum);
1141 skb->ip_summed = CHECKSUM_NONE;
1142
1143 /* Check if there is enough headroom to insert fragment header. */
1144 if ((skb_mac_header(skb) < skb->head + frag_hdr_sz) &&
1145 pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC))
1146 goto out;
1147
1148 /* Find the unfragmentable header and shift it left by frag_hdr_sz
1149 * bytes to insert fragment header.
1150 */
1151 unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr);
1152 nexthdr = *prevhdr;
1153 *prevhdr = NEXTHDR_FRAGMENT;
1154 unfrag_len = skb_network_header(skb) - skb_mac_header(skb) +
1155 unfrag_ip6hlen;
1156 mac_start = skb_mac_header(skb);
1157 memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len);
1158
1159 skb->mac_header -= frag_hdr_sz;
1160 skb->network_header -= frag_hdr_sz;
1161
1162 fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
1163 fptr->nexthdr = nexthdr;
1164 fptr->reserved = 0;
1165 ipv6_select_ident(fptr);
1166
1167 /* Fragment the skb. ipv6 header and the remaining fields of the
1168 * fragment header are updated in ipv6_gso_segment()
1169 */
1170 segs = skb_segment(skb, features);
1171
1172 out:
1173 return segs;
1174 }
1175
1176 static const struct inet6_protocol udpv6_protocol = {
1177 .handler = udpv6_rcv,
1178 .err_handler = udpv6_err,
1179 .gso_send_check = udp6_ufo_send_check,
1180 .gso_segment = udp6_ufo_fragment,
1181 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
1182 };
1183
1184 /* ------------------------------------------------------------------------ */
1185 #ifdef CONFIG_PROC_FS
1186
1187 static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket)
1188 {
1189 struct inet_sock *inet = inet_sk(sp);
1190 struct ipv6_pinfo *np = inet6_sk(sp);
1191 struct in6_addr *dest, *src;
1192 __u16 destp, srcp;
1193
1194 dest = &np->daddr;
1195 src = &np->rcv_saddr;
1196 destp = ntohs(inet->dport);
1197 srcp = ntohs(inet->sport);
1198 seq_printf(seq,
1199 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1200 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1201 bucket,
1202 src->s6_addr32[0], src->s6_addr32[1],
1203 src->s6_addr32[2], src->s6_addr32[3], srcp,
1204 dest->s6_addr32[0], dest->s6_addr32[1],
1205 dest->s6_addr32[2], dest->s6_addr32[3], destp,
1206 sp->sk_state,
1207 sk_wmem_alloc_get(sp),
1208 sk_rmem_alloc_get(sp),
1209 0, 0L, 0,
1210 sock_i_uid(sp), 0,
1211 sock_i_ino(sp),
1212 atomic_read(&sp->sk_refcnt), sp,
1213 atomic_read(&sp->sk_drops));
1214 }
1215
1216 int udp6_seq_show(struct seq_file *seq, void *v)
1217 {
1218 if (v == SEQ_START_TOKEN)
1219 seq_printf(seq,
1220 " sl "
1221 "local_address "
1222 "remote_address "
1223 "st tx_queue rx_queue tr tm->when retrnsmt"
1224 " uid timeout inode ref pointer drops\n");
1225 else
1226 udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket);
1227 return 0;
1228 }
1229
1230 static struct udp_seq_afinfo udp6_seq_afinfo = {
1231 .name = "udp6",
1232 .family = AF_INET6,
1233 .udp_table = &udp_table,
1234 .seq_fops = {
1235 .owner = THIS_MODULE,
1236 },
1237 .seq_ops = {
1238 .show = udp6_seq_show,
1239 },
1240 };
1241
1242 int udp6_proc_init(struct net *net)
1243 {
1244 return udp_proc_register(net, &udp6_seq_afinfo);
1245 }
1246
1247 void udp6_proc_exit(struct net *net) {
1248 udp_proc_unregister(net, &udp6_seq_afinfo);
1249 }
1250 #endif /* CONFIG_PROC_FS */
1251
1252 /* ------------------------------------------------------------------------ */
1253
1254 struct proto udpv6_prot = {
1255 .name = "UDPv6",
1256 .owner = THIS_MODULE,
1257 .close = udp_lib_close,
1258 .connect = ip6_datagram_connect,
1259 .disconnect = udp_disconnect,
1260 .ioctl = udp_ioctl,
1261 .destroy = udpv6_destroy_sock,
1262 .setsockopt = udpv6_setsockopt,
1263 .getsockopt = udpv6_getsockopt,
1264 .sendmsg = udpv6_sendmsg,
1265 .recvmsg = udpv6_recvmsg,
1266 .backlog_rcv = udpv6_queue_rcv_skb,
1267 .hash = udp_lib_hash,
1268 .unhash = udp_lib_unhash,
1269 .get_port = udp_v6_get_port,
1270 .memory_allocated = &udp_memory_allocated,
1271 .sysctl_mem = sysctl_udp_mem,
1272 .sysctl_wmem = &sysctl_udp_wmem_min,
1273 .sysctl_rmem = &sysctl_udp_rmem_min,
1274 .obj_size = sizeof(struct udp6_sock),
1275 .slab_flags = SLAB_DESTROY_BY_RCU,
1276 .h.udp_table = &udp_table,
1277 #ifdef CONFIG_COMPAT
1278 .compat_setsockopt = compat_udpv6_setsockopt,
1279 .compat_getsockopt = compat_udpv6_getsockopt,
1280 #endif
1281 };
1282
1283 static struct inet_protosw udpv6_protosw = {
1284 .type = SOCK_DGRAM,
1285 .protocol = IPPROTO_UDP,
1286 .prot = &udpv6_prot,
1287 .ops = &inet6_dgram_ops,
1288 .capability =-1,
1289 .no_check = UDP_CSUM_DEFAULT,
1290 .flags = INET_PROTOSW_PERMANENT,
1291 };
1292
1293
1294 int __init udpv6_init(void)
1295 {
1296 int ret;
1297
1298 ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP);
1299 if (ret)
1300 goto out;
1301
1302 ret = inet6_register_protosw(&udpv6_protosw);
1303 if (ret)
1304 goto out_udpv6_protocol;
1305 out:
1306 return ret;
1307
1308 out_udpv6_protocol:
1309 inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
1310 goto out;
1311 }
1312
1313 void udpv6_exit(void)
1314 {
1315 inet6_unregister_protosw(&udpv6_protosw);
1316 inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
1317 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree