3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Based on linux/ipv4/udp.c
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.
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.
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 <linux/slab.h>
38 #include <asm/uaccess.h>
40 #include <net/ndisc.h>
41 #include <net/protocol.h>
42 #include <net/transp_v6.h>
43 #include <net/ip6_route.h>
45 #include <net/tcp_states.h>
46 #include <net/ip6_checksum.h>
48 #include <net/inet6_hashtables.h>
49 #include <net/busy_poll.h>
50 #include <net/sock_reuseport.h>
52 #include <linux/proc_fs.h>
53 #include <linux/seq_file.h>
54 #include <trace/events/skb.h>
57 static u32
udp6_ehashfn(const struct net
*net
,
58 const struct in6_addr
*laddr
,
60 const struct in6_addr
*faddr
,
63 static u32 udp6_ehash_secret __read_mostly
;
64 static u32 udp_ipv6_hash_secret __read_mostly
;
68 net_get_random_once(&udp6_ehash_secret
,
69 sizeof(udp6_ehash_secret
));
70 net_get_random_once(&udp_ipv6_hash_secret
,
71 sizeof(udp_ipv6_hash_secret
));
73 lhash
= (__force u32
)laddr
->s6_addr32
[3];
74 fhash
= __ipv6_addr_jhash(faddr
, udp_ipv6_hash_secret
);
76 return __inet6_ehashfn(lhash
, lport
, fhash
, fport
,
77 udp_ipv6_hash_secret
+ net_hash_mix(net
));
80 /* match_wildcard == true: IPV6_ADDR_ANY equals to any IPv6 addresses if IPv6
81 * only, and any IPv4 addresses if not IPv6 only
82 * match_wildcard == false: addresses must be exactly the same, i.e.
83 * IPV6_ADDR_ANY only equals to IPV6_ADDR_ANY,
84 * and 0.0.0.0 equals to 0.0.0.0 only
86 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
,
89 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
90 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
91 int addr_type
= ipv6_addr_type(&sk
->sk_v6_rcv_saddr
);
92 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
94 /* if both are mapped, treat as IPv4 */
95 if (addr_type
== IPV6_ADDR_MAPPED
&& addr_type2
== IPV6_ADDR_MAPPED
) {
97 if (sk
->sk_rcv_saddr
== sk2
->sk_rcv_saddr
)
99 if (!sk
->sk_rcv_saddr
|| !sk2
->sk_rcv_saddr
)
100 return match_wildcard
;
105 if (addr_type
== IPV6_ADDR_ANY
&& addr_type2
== IPV6_ADDR_ANY
)
108 if (addr_type2
== IPV6_ADDR_ANY
&& match_wildcard
&&
109 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
112 if (addr_type
== IPV6_ADDR_ANY
&& match_wildcard
&&
113 !(ipv6_only_sock(sk
) && addr_type2
== IPV6_ADDR_MAPPED
))
116 if (sk2_rcv_saddr6
&&
117 ipv6_addr_equal(&sk
->sk_v6_rcv_saddr
, sk2_rcv_saddr6
))
123 static u32
udp6_portaddr_hash(const struct net
*net
,
124 const struct in6_addr
*addr6
,
127 unsigned int hash
, mix
= net_hash_mix(net
);
129 if (ipv6_addr_any(addr6
))
130 hash
= jhash_1word(0, mix
);
131 else if (ipv6_addr_v4mapped(addr6
))
132 hash
= jhash_1word((__force u32
)addr6
->s6_addr32
[3], mix
);
134 hash
= jhash2((__force u32
*)addr6
->s6_addr32
, 4, mix
);
139 int udp_v6_get_port(struct sock
*sk
, unsigned short snum
)
141 unsigned int hash2_nulladdr
=
142 udp6_portaddr_hash(sock_net(sk
), &in6addr_any
, snum
);
143 unsigned int hash2_partial
=
144 udp6_portaddr_hash(sock_net(sk
), &sk
->sk_v6_rcv_saddr
, 0);
146 /* precompute partial secondary hash */
147 udp_sk(sk
)->udp_portaddr_hash
= hash2_partial
;
148 return udp_lib_get_port(sk
, snum
, ipv6_rcv_saddr_equal
, hash2_nulladdr
);
151 static void udp_v6_rehash(struct sock
*sk
)
153 u16 new_hash
= udp6_portaddr_hash(sock_net(sk
),
154 &sk
->sk_v6_rcv_saddr
,
155 inet_sk(sk
)->inet_num
);
157 udp_lib_rehash(sk
, new_hash
);
160 static inline int compute_score(struct sock
*sk
, struct net
*net
,
162 const struct in6_addr
*saddr
, __be16 sport
,
163 const struct in6_addr
*daddr
, __be16 dport
,
167 struct inet_sock
*inet
;
169 if (!net_eq(sock_net(sk
), net
) ||
170 udp_sk(sk
)->udp_port_hash
!= hnum
||
171 sk
->sk_family
!= PF_INET6
)
177 if (inet
->inet_dport
) {
178 if (inet
->inet_dport
!= sport
)
183 if (!ipv6_addr_any(&sk
->sk_v6_rcv_saddr
)) {
184 if (!ipv6_addr_equal(&sk
->sk_v6_rcv_saddr
, daddr
))
189 if (!ipv6_addr_any(&sk
->sk_v6_daddr
)) {
190 if (!ipv6_addr_equal(&sk
->sk_v6_daddr
, saddr
))
195 if (sk
->sk_bound_dev_if
) {
196 if (sk
->sk_bound_dev_if
!= dif
)
201 if (sk
->sk_incoming_cpu
== raw_smp_processor_id())
207 static inline int compute_score2(struct sock
*sk
, struct net
*net
,
208 const struct in6_addr
*saddr
, __be16 sport
,
209 const struct in6_addr
*daddr
,
210 unsigned short hnum
, int dif
)
213 struct inet_sock
*inet
;
215 if (!net_eq(sock_net(sk
), net
) ||
216 udp_sk(sk
)->udp_port_hash
!= hnum
||
217 sk
->sk_family
!= PF_INET6
)
220 if (!ipv6_addr_equal(&sk
->sk_v6_rcv_saddr
, daddr
))
226 if (inet
->inet_dport
) {
227 if (inet
->inet_dport
!= sport
)
232 if (!ipv6_addr_any(&sk
->sk_v6_daddr
)) {
233 if (!ipv6_addr_equal(&sk
->sk_v6_daddr
, saddr
))
238 if (sk
->sk_bound_dev_if
) {
239 if (sk
->sk_bound_dev_if
!= dif
)
244 if (sk
->sk_incoming_cpu
== raw_smp_processor_id())
250 /* called with read_rcu_lock() */
251 static struct sock
*udp6_lib_lookup2(struct net
*net
,
252 const struct in6_addr
*saddr
, __be16 sport
,
253 const struct in6_addr
*daddr
, unsigned int hnum
, int dif
,
254 struct udp_hslot
*hslot2
, unsigned int slot2
,
257 struct sock
*sk
, *result
;
258 struct hlist_nulls_node
*node
;
259 int score
, badness
, matches
= 0, reuseport
= 0;
260 bool select_ok
= true;
266 udp_portaddr_for_each_entry_rcu(sk
, node
, &hslot2
->head
) {
267 score
= compute_score2(sk
, net
, saddr
, sport
,
269 if (score
> badness
) {
272 reuseport
= sk
->sk_reuseport
;
274 hash
= udp6_ehashfn(net
, daddr
, hnum
,
279 sk2
= reuseport_select_sock(sk
, hash
, skb
,
280 sizeof(struct udphdr
));
289 } else if (score
== badness
&& reuseport
) {
291 if (reciprocal_scale(hash
, matches
) == 0)
293 hash
= next_pseudo_random32(hash
);
297 * if the nulls value we got at the end of this lookup is
298 * not the expected one, we must restart lookup.
299 * We probably met an item that was moved to another chain.
301 if (get_nulls_value(node
) != slot2
)
306 if (unlikely(!atomic_inc_not_zero_hint(&result
->sk_refcnt
, 2)))
308 else if (unlikely(compute_score2(result
, net
, saddr
, sport
,
309 daddr
, hnum
, dif
) < badness
)) {
317 struct sock
*__udp6_lib_lookup(struct net
*net
,
318 const struct in6_addr
*saddr
, __be16 sport
,
319 const struct in6_addr
*daddr
, __be16 dport
,
320 int dif
, struct udp_table
*udptable
,
323 struct sock
*sk
, *result
;
324 struct hlist_nulls_node
*node
;
325 unsigned short hnum
= ntohs(dport
);
326 unsigned int hash2
, slot2
, slot
= udp_hashfn(net
, hnum
, udptable
->mask
);
327 struct udp_hslot
*hslot2
, *hslot
= &udptable
->hash
[slot
];
328 int score
, badness
, matches
= 0, reuseport
= 0;
329 bool select_ok
= true;
333 if (hslot
->count
> 10) {
334 hash2
= udp6_portaddr_hash(net
, daddr
, hnum
);
335 slot2
= hash2
& udptable
->mask
;
336 hslot2
= &udptable
->hash2
[slot2
];
337 if (hslot
->count
< hslot2
->count
)
340 result
= udp6_lib_lookup2(net
, saddr
, sport
,
344 hash2
= udp6_portaddr_hash(net
, &in6addr_any
, hnum
);
345 slot2
= hash2
& udptable
->mask
;
346 hslot2
= &udptable
->hash2
[slot2
];
347 if (hslot
->count
< hslot2
->count
)
350 result
= udp6_lib_lookup2(net
, saddr
, sport
,
351 &in6addr_any
, hnum
, dif
,
360 sk_nulls_for_each_rcu(sk
, node
, &hslot
->head
) {
361 score
= compute_score(sk
, net
, hnum
, saddr
, sport
, daddr
, dport
, dif
);
362 if (score
> badness
) {
365 reuseport
= sk
->sk_reuseport
;
367 hash
= udp6_ehashfn(net
, daddr
, hnum
,
372 sk2
= reuseport_select_sock(sk
, hash
, skb
,
373 sizeof(struct udphdr
));
382 } else if (score
== badness
&& reuseport
) {
384 if (reciprocal_scale(hash
, matches
) == 0)
386 hash
= next_pseudo_random32(hash
);
390 * if the nulls value we got at the end of this lookup is
391 * not the expected one, we must restart lookup.
392 * We probably met an item that was moved to another chain.
394 if (get_nulls_value(node
) != slot
)
399 if (unlikely(!atomic_inc_not_zero_hint(&result
->sk_refcnt
, 2)))
401 else if (unlikely(compute_score(result
, net
, hnum
, saddr
, sport
,
402 daddr
, dport
, dif
) < badness
)) {
410 EXPORT_SYMBOL_GPL(__udp6_lib_lookup
);
412 static struct sock
*__udp6_lib_lookup_skb(struct sk_buff
*skb
,
413 __be16 sport
, __be16 dport
,
414 struct udp_table
*udptable
)
417 const struct ipv6hdr
*iph
= ipv6_hdr(skb
);
419 sk
= skb_steal_sock(skb
);
422 return __udp6_lib_lookup(dev_net(skb_dst(skb
)->dev
), &iph
->saddr
, sport
,
423 &iph
->daddr
, dport
, inet6_iif(skb
),
427 struct sock
*udp6_lib_lookup(struct net
*net
, const struct in6_addr
*saddr
, __be16 sport
,
428 const struct in6_addr
*daddr
, __be16 dport
, int dif
)
430 return __udp6_lib_lookup(net
, saddr
, sport
, daddr
, dport
, dif
, &udp_table
, NULL
);
432 EXPORT_SYMBOL_GPL(udp6_lib_lookup
);
435 * This should be easy, if there is something there we
436 * return it, otherwise we block.
439 int udpv6_recvmsg(struct sock
*sk
, struct msghdr
*msg
, size_t len
,
440 int noblock
, int flags
, int *addr_len
)
442 struct ipv6_pinfo
*np
= inet6_sk(sk
);
443 struct inet_sock
*inet
= inet_sk(sk
);
445 unsigned int ulen
, copied
;
448 int is_udplite
= IS_UDPLITE(sk
);
449 bool checksum_valid
= false;
453 if (flags
& MSG_ERRQUEUE
)
454 return ipv6_recv_error(sk
, msg
, len
, addr_len
);
456 if (np
->rxpmtu
&& np
->rxopt
.bits
.rxpmtu
)
457 return ipv6_recv_rxpmtu(sk
, msg
, len
, addr_len
);
460 skb
= __skb_recv_datagram(sk
, flags
| (noblock
? MSG_DONTWAIT
: 0),
461 &peeked
, &off
, &err
);
465 ulen
= skb
->len
- sizeof(struct udphdr
);
469 else if (copied
< ulen
)
470 msg
->msg_flags
|= MSG_TRUNC
;
472 is_udp4
= (skb
->protocol
== htons(ETH_P_IP
));
475 * If checksum is needed at all, try to do it while copying the
476 * data. If the data is truncated, or if we only want a partial
477 * coverage checksum (UDP-Lite), do it before the copy.
480 if (copied
< ulen
|| UDP_SKB_CB(skb
)->partial_cov
) {
481 checksum_valid
= !udp_lib_checksum_complete(skb
);
486 if (checksum_valid
|| skb_csum_unnecessary(skb
))
487 err
= skb_copy_datagram_msg(skb
, sizeof(struct udphdr
),
490 err
= skb_copy_and_csum_datagram_msg(skb
, sizeof(struct udphdr
), msg
);
495 trace_kfree_skb(skb
, udpv6_recvmsg
);
497 atomic_inc(&sk
->sk_drops
);
499 UDP_INC_STATS_USER(sock_net(sk
),
503 UDP6_INC_STATS_USER(sock_net(sk
),
511 UDP_INC_STATS_USER(sock_net(sk
),
512 UDP_MIB_INDATAGRAMS
, is_udplite
);
514 UDP6_INC_STATS_USER(sock_net(sk
),
515 UDP_MIB_INDATAGRAMS
, is_udplite
);
518 sock_recv_ts_and_drops(msg
, sk
, skb
);
520 /* Copy the address. */
522 DECLARE_SOCKADDR(struct sockaddr_in6
*, sin6
, msg
->msg_name
);
523 sin6
->sin6_family
= AF_INET6
;
524 sin6
->sin6_port
= udp_hdr(skb
)->source
;
525 sin6
->sin6_flowinfo
= 0;
528 ipv6_addr_set_v4mapped(ip_hdr(skb
)->saddr
,
530 sin6
->sin6_scope_id
= 0;
532 sin6
->sin6_addr
= ipv6_hdr(skb
)->saddr
;
533 sin6
->sin6_scope_id
=
534 ipv6_iface_scope_id(&sin6
->sin6_addr
,
537 *addr_len
= sizeof(*sin6
);
541 ip6_datagram_recv_common_ctl(sk
, msg
, skb
);
544 if (inet
->cmsg_flags
)
545 ip_cmsg_recv(msg
, skb
);
548 ip6_datagram_recv_specific_ctl(sk
, msg
, skb
);
552 if (flags
& MSG_TRUNC
)
556 skb_free_datagram_locked(sk
, skb
);
561 slow
= lock_sock_fast(sk
);
562 if (!skb_kill_datagram(sk
, skb
, flags
)) {
564 UDP_INC_STATS_USER(sock_net(sk
),
565 UDP_MIB_CSUMERRORS
, is_udplite
);
566 UDP_INC_STATS_USER(sock_net(sk
),
567 UDP_MIB_INERRORS
, is_udplite
);
569 UDP6_INC_STATS_USER(sock_net(sk
),
570 UDP_MIB_CSUMERRORS
, is_udplite
);
571 UDP6_INC_STATS_USER(sock_net(sk
),
572 UDP_MIB_INERRORS
, is_udplite
);
575 unlock_sock_fast(sk
, slow
);
577 /* starting over for a new packet, but check if we need to yield */
579 msg
->msg_flags
&= ~MSG_TRUNC
;
583 void __udp6_lib_err(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
584 u8 type
, u8 code
, int offset
, __be32 info
,
585 struct udp_table
*udptable
)
587 struct ipv6_pinfo
*np
;
588 const struct ipv6hdr
*hdr
= (const struct ipv6hdr
*)skb
->data
;
589 const struct in6_addr
*saddr
= &hdr
->saddr
;
590 const struct in6_addr
*daddr
= &hdr
->daddr
;
591 struct udphdr
*uh
= (struct udphdr
*)(skb
->data
+offset
);
594 struct net
*net
= dev_net(skb
->dev
);
596 sk
= __udp6_lib_lookup(net
, daddr
, uh
->dest
, saddr
, uh
->source
,
597 inet6_iif(skb
), udptable
, skb
);
599 ICMP6_INC_STATS_BH(net
, __in6_dev_get(skb
->dev
),
604 if (type
== ICMPV6_PKT_TOOBIG
) {
605 if (!ip6_sk_accept_pmtu(sk
))
607 ip6_sk_update_pmtu(skb
, sk
, info
);
609 if (type
== NDISC_REDIRECT
) {
610 ip6_sk_redirect(skb
, sk
);
616 if (!icmpv6_err_convert(type
, code
, &err
) && !np
->recverr
)
619 if (sk
->sk_state
!= TCP_ESTABLISHED
&& !np
->recverr
)
623 ipv6_icmp_error(sk
, skb
, err
, uh
->dest
, ntohl(info
), (u8
*)(uh
+1));
626 sk
->sk_error_report(sk
);
631 static int __udpv6_queue_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
635 if (!ipv6_addr_any(&sk
->sk_v6_daddr
)) {
636 sock_rps_save_rxhash(sk
, skb
);
637 sk_mark_napi_id(sk
, skb
);
638 sk_incoming_cpu_update(sk
);
641 rc
= sock_queue_rcv_skb(sk
, skb
);
643 int is_udplite
= IS_UDPLITE(sk
);
645 /* Note that an ENOMEM error is charged twice */
647 UDP6_INC_STATS_BH(sock_net(sk
),
648 UDP_MIB_RCVBUFERRORS
, is_udplite
);
649 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_INERRORS
, is_udplite
);
656 static __inline__
void udpv6_err(struct sk_buff
*skb
,
657 struct inet6_skb_parm
*opt
, u8 type
,
658 u8 code
, int offset
, __be32 info
)
660 __udp6_lib_err(skb
, opt
, type
, code
, offset
, info
, &udp_table
);
663 static struct static_key udpv6_encap_needed __read_mostly
;
664 void udpv6_encap_enable(void)
666 if (!static_key_enabled(&udpv6_encap_needed
))
667 static_key_slow_inc(&udpv6_encap_needed
);
669 EXPORT_SYMBOL(udpv6_encap_enable
);
671 int udpv6_queue_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
673 struct udp_sock
*up
= udp_sk(sk
);
675 int is_udplite
= IS_UDPLITE(sk
);
677 if (!xfrm6_policy_check(sk
, XFRM_POLICY_IN
, skb
))
680 if (static_key_false(&udpv6_encap_needed
) && up
->encap_type
) {
681 int (*encap_rcv
)(struct sock
*sk
, struct sk_buff
*skb
);
684 * This is an encapsulation socket so pass the skb to
685 * the socket's udp_encap_rcv() hook. Otherwise, just
686 * fall through and pass this up the UDP socket.
687 * up->encap_rcv() returns the following value:
688 * =0 if skb was successfully passed to the encap
689 * handler or was discarded by it.
690 * >0 if skb should be passed on to UDP.
691 * <0 if skb should be resubmitted as proto -N
694 /* if we're overly short, let UDP handle it */
695 encap_rcv
= ACCESS_ONCE(up
->encap_rcv
);
696 if (skb
->len
> sizeof(struct udphdr
) && encap_rcv
) {
699 /* Verify checksum before giving to encap */
700 if (udp_lib_checksum_complete(skb
))
703 ret
= encap_rcv(sk
, skb
);
705 UDP_INC_STATS_BH(sock_net(sk
),
712 /* FALLTHROUGH -- it's a UDP Packet */
716 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
718 if ((is_udplite
& UDPLITE_RECV_CC
) && UDP_SKB_CB(skb
)->partial_cov
) {
720 if (up
->pcrlen
== 0) { /* full coverage was set */
721 net_dbg_ratelimited("UDPLITE6: partial coverage %d while full coverage %d requested\n",
722 UDP_SKB_CB(skb
)->cscov
, skb
->len
);
725 if (UDP_SKB_CB(skb
)->cscov
< up
->pcrlen
) {
726 net_dbg_ratelimited("UDPLITE6: coverage %d too small, need min %d\n",
727 UDP_SKB_CB(skb
)->cscov
, up
->pcrlen
);
732 if (rcu_access_pointer(sk
->sk_filter
)) {
733 if (udp_lib_checksum_complete(skb
))
737 if (sk_rcvqueues_full(sk
, sk
->sk_rcvbuf
)) {
738 UDP6_INC_STATS_BH(sock_net(sk
),
739 UDP_MIB_RCVBUFERRORS
, is_udplite
);
747 if (!sock_owned_by_user(sk
))
748 rc
= __udpv6_queue_rcv_skb(sk
, skb
);
749 else if (sk_add_backlog(sk
, skb
, sk
->sk_rcvbuf
)) {
758 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_CSUMERRORS
, is_udplite
);
760 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_INERRORS
, is_udplite
);
761 atomic_inc(&sk
->sk_drops
);
766 static bool __udp_v6_is_mcast_sock(struct net
*net
, struct sock
*sk
,
767 __be16 loc_port
, const struct in6_addr
*loc_addr
,
768 __be16 rmt_port
, const struct in6_addr
*rmt_addr
,
769 int dif
, unsigned short hnum
)
771 struct inet_sock
*inet
= inet_sk(sk
);
773 if (!net_eq(sock_net(sk
), net
))
776 if (udp_sk(sk
)->udp_port_hash
!= hnum
||
777 sk
->sk_family
!= PF_INET6
||
778 (inet
->inet_dport
&& inet
->inet_dport
!= rmt_port
) ||
779 (!ipv6_addr_any(&sk
->sk_v6_daddr
) &&
780 !ipv6_addr_equal(&sk
->sk_v6_daddr
, rmt_addr
)) ||
781 (sk
->sk_bound_dev_if
&& sk
->sk_bound_dev_if
!= dif
) ||
782 (!ipv6_addr_any(&sk
->sk_v6_rcv_saddr
) &&
783 !ipv6_addr_equal(&sk
->sk_v6_rcv_saddr
, loc_addr
)))
785 if (!inet6_mc_check(sk
, loc_addr
, rmt_addr
))
790 static void flush_stack(struct sock
**stack
, unsigned int count
,
791 struct sk_buff
*skb
, unsigned int final
)
793 struct sk_buff
*skb1
= NULL
;
797 for (i
= 0; i
< count
; i
++) {
800 skb1
= (i
== final
) ? skb
: skb_clone(skb
, GFP_ATOMIC
);
802 atomic_inc(&sk
->sk_drops
);
803 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_RCVBUFERRORS
,
805 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_INERRORS
,
809 if (skb1
&& udpv6_queue_rcv_skb(sk
, skb1
) <= 0)
817 static void udp6_csum_zero_error(struct sk_buff
*skb
)
819 /* RFC 2460 section 8.1 says that we SHOULD log
820 * this error. Well, it is reasonable.
822 net_dbg_ratelimited("IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n",
823 &ipv6_hdr(skb
)->saddr
, ntohs(udp_hdr(skb
)->source
),
824 &ipv6_hdr(skb
)->daddr
, ntohs(udp_hdr(skb
)->dest
));
828 * Note: called only from the BH handler context,
829 * so we don't need to lock the hashes.
831 static int __udp6_lib_mcast_deliver(struct net
*net
, struct sk_buff
*skb
,
832 const struct in6_addr
*saddr
, const struct in6_addr
*daddr
,
833 struct udp_table
*udptable
, int proto
)
835 struct sock
*sk
, *stack
[256 / sizeof(struct sock
*)];
836 const struct udphdr
*uh
= udp_hdr(skb
);
837 struct hlist_nulls_node
*node
;
838 unsigned short hnum
= ntohs(uh
->dest
);
839 struct udp_hslot
*hslot
= udp_hashslot(udptable
, net
, hnum
);
840 int dif
= inet6_iif(skb
);
841 unsigned int count
= 0, offset
= offsetof(typeof(*sk
), sk_nulls_node
);
842 unsigned int hash2
= 0, hash2_any
= 0, use_hash2
= (hslot
->count
> 10);
843 bool inner_flushed
= false;
846 hash2_any
= udp6_portaddr_hash(net
, &in6addr_any
, hnum
) &
848 hash2
= udp6_portaddr_hash(net
, daddr
, hnum
) & udp_table
.mask
;
850 hslot
= &udp_table
.hash2
[hash2
];
851 offset
= offsetof(typeof(*sk
), __sk_common
.skc_portaddr_node
);
854 spin_lock(&hslot
->lock
);
855 sk_nulls_for_each_entry_offset(sk
, node
, &hslot
->head
, offset
) {
856 if (__udp_v6_is_mcast_sock(net
, sk
,
860 /* If zero checksum and no_check is not on for
861 * the socket then skip it.
863 (uh
->check
|| udp_sk(sk
)->no_check6_rx
)) {
864 if (unlikely(count
== ARRAY_SIZE(stack
))) {
865 flush_stack(stack
, count
, skb
, ~0);
866 inner_flushed
= true;
874 spin_unlock(&hslot
->lock
);
876 /* Also lookup *:port if we are using hash2 and haven't done so yet. */
877 if (use_hash2
&& hash2
!= hash2_any
) {
883 flush_stack(stack
, count
, skb
, count
- 1);
886 UDP_INC_STATS_BH(net
, UDP_MIB_IGNOREDMULTI
,
887 proto
== IPPROTO_UDPLITE
);
893 int __udp6_lib_rcv(struct sk_buff
*skb
, struct udp_table
*udptable
,
896 struct net
*net
= dev_net(skb
->dev
);
899 const struct in6_addr
*saddr
, *daddr
;
902 if (!pskb_may_pull(skb
, sizeof(struct udphdr
)))
905 saddr
= &ipv6_hdr(skb
)->saddr
;
906 daddr
= &ipv6_hdr(skb
)->daddr
;
909 ulen
= ntohs(uh
->len
);
913 if (proto
== IPPROTO_UDP
) {
914 /* UDP validates ulen. */
916 /* Check for jumbo payload */
920 if (ulen
< sizeof(*uh
))
923 if (ulen
< skb
->len
) {
924 if (pskb_trim_rcsum(skb
, ulen
))
926 saddr
= &ipv6_hdr(skb
)->saddr
;
927 daddr
= &ipv6_hdr(skb
)->daddr
;
932 if (udp6_csum_init(skb
, uh
, proto
))
936 * Multicast receive code
938 if (ipv6_addr_is_multicast(daddr
))
939 return __udp6_lib_mcast_deliver(net
, skb
,
940 saddr
, daddr
, udptable
, proto
);
945 * check socket cache ... must talk to Alan about his plans
946 * for sock caches... i'll skip this for now.
948 sk
= __udp6_lib_lookup_skb(skb
, uh
->source
, uh
->dest
, udptable
);
952 if (!uh
->check
&& !udp_sk(sk
)->no_check6_rx
) {
954 udp6_csum_zero_error(skb
);
958 if (inet_get_convert_csum(sk
) && uh
->check
&& !IS_UDPLITE(sk
))
959 skb_checksum_try_convert(skb
, IPPROTO_UDP
, uh
->check
,
962 ret
= udpv6_queue_rcv_skb(sk
, skb
);
965 /* a return value > 0 means to resubmit the input, but
966 * it wants the return to be -protocol, or 0
975 udp6_csum_zero_error(skb
);
979 if (!xfrm6_policy_check(NULL
, XFRM_POLICY_IN
, skb
))
982 if (udp_lib_checksum_complete(skb
))
985 UDP6_INC_STATS_BH(net
, UDP_MIB_NOPORTS
, proto
== IPPROTO_UDPLITE
);
986 icmpv6_send(skb
, ICMPV6_DEST_UNREACH
, ICMPV6_PORT_UNREACH
, 0);
992 net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n",
993 proto
== IPPROTO_UDPLITE
? "-Lite" : "",
994 saddr
, ntohs(uh
->source
),
996 daddr
, ntohs(uh
->dest
));
999 UDP6_INC_STATS_BH(net
, UDP_MIB_CSUMERRORS
, proto
== IPPROTO_UDPLITE
);
1001 UDP6_INC_STATS_BH(net
, UDP_MIB_INERRORS
, proto
== IPPROTO_UDPLITE
);
1006 static __inline__
int udpv6_rcv(struct sk_buff
*skb
)
1008 return __udp6_lib_rcv(skb
, &udp_table
, IPPROTO_UDP
);
1012 * Throw away all pending data and cancel the corking. Socket is locked.
1014 static void udp_v6_flush_pending_frames(struct sock
*sk
)
1016 struct udp_sock
*up
= udp_sk(sk
);
1018 if (up
->pending
== AF_INET
)
1019 udp_flush_pending_frames(sk
);
1020 else if (up
->pending
) {
1023 ip6_flush_pending_frames(sk
);
1028 * udp6_hwcsum_outgoing - handle outgoing HW checksumming
1029 * @sk: socket we are sending on
1030 * @skb: sk_buff containing the filled-in UDP header
1031 * (checksum field must be zeroed out)
1033 static void udp6_hwcsum_outgoing(struct sock
*sk
, struct sk_buff
*skb
,
1034 const struct in6_addr
*saddr
,
1035 const struct in6_addr
*daddr
, int len
)
1037 unsigned int offset
;
1038 struct udphdr
*uh
= udp_hdr(skb
);
1039 struct sk_buff
*frags
= skb_shinfo(skb
)->frag_list
;
1043 /* Only one fragment on the socket. */
1044 skb
->csum_start
= skb_transport_header(skb
) - skb
->head
;
1045 skb
->csum_offset
= offsetof(struct udphdr
, check
);
1046 uh
->check
= ~csum_ipv6_magic(saddr
, daddr
, len
, IPPROTO_UDP
, 0);
1049 * HW-checksum won't work as there are two or more
1050 * fragments on the socket so that all csums of sk_buffs
1051 * should be together
1053 offset
= skb_transport_offset(skb
);
1054 skb
->csum
= skb_checksum(skb
, offset
, skb
->len
- offset
, 0);
1056 skb
->ip_summed
= CHECKSUM_NONE
;
1059 csum
= csum_add(csum
, frags
->csum
);
1060 } while ((frags
= frags
->next
));
1062 uh
->check
= csum_ipv6_magic(saddr
, daddr
, len
, IPPROTO_UDP
,
1065 uh
->check
= CSUM_MANGLED_0
;
1073 static int udp_v6_send_skb(struct sk_buff
*skb
, struct flowi6
*fl6
)
1075 struct sock
*sk
= skb
->sk
;
1078 int is_udplite
= IS_UDPLITE(sk
);
1080 int offset
= skb_transport_offset(skb
);
1081 int len
= skb
->len
- offset
;
1084 * Create a UDP header
1087 uh
->source
= fl6
->fl6_sport
;
1088 uh
->dest
= fl6
->fl6_dport
;
1089 uh
->len
= htons(len
);
1093 csum
= udplite_csum(skb
);
1094 else if (udp_sk(sk
)->no_check6_tx
) { /* UDP csum disabled */
1095 skb
->ip_summed
= CHECKSUM_NONE
;
1097 } else if (skb
->ip_summed
== CHECKSUM_PARTIAL
) { /* UDP hardware csum */
1098 udp6_hwcsum_outgoing(sk
, skb
, &fl6
->saddr
, &fl6
->daddr
, len
);
1101 csum
= udp_csum(skb
);
1103 /* add protocol-dependent pseudo-header */
1104 uh
->check
= csum_ipv6_magic(&fl6
->saddr
, &fl6
->daddr
,
1105 len
, fl6
->flowi6_proto
, csum
);
1107 uh
->check
= CSUM_MANGLED_0
;
1110 err
= ip6_send_skb(skb
);
1112 if (err
== -ENOBUFS
&& !inet6_sk(sk
)->recverr
) {
1113 UDP6_INC_STATS_USER(sock_net(sk
),
1114 UDP_MIB_SNDBUFERRORS
, is_udplite
);
1118 UDP6_INC_STATS_USER(sock_net(sk
),
1119 UDP_MIB_OUTDATAGRAMS
, is_udplite
);
1123 static int udp_v6_push_pending_frames(struct sock
*sk
)
1125 struct sk_buff
*skb
;
1126 struct udp_sock
*up
= udp_sk(sk
);
1130 if (up
->pending
== AF_INET
)
1131 return udp_push_pending_frames(sk
);
1133 /* ip6_finish_skb will release the cork, so make a copy of
1136 fl6
= inet_sk(sk
)->cork
.fl
.u
.ip6
;
1138 skb
= ip6_finish_skb(sk
);
1142 err
= udp_v6_send_skb(skb
, &fl6
);
1150 int udpv6_sendmsg(struct sock
*sk
, struct msghdr
*msg
, size_t len
)
1152 struct ipv6_txoptions opt_space
;
1153 struct udp_sock
*up
= udp_sk(sk
);
1154 struct inet_sock
*inet
= inet_sk(sk
);
1155 struct ipv6_pinfo
*np
= inet6_sk(sk
);
1156 DECLARE_SOCKADDR(struct sockaddr_in6
*, sin6
, msg
->msg_name
);
1157 struct in6_addr
*daddr
, *final_p
, final
;
1158 struct ipv6_txoptions
*opt
= NULL
;
1159 struct ipv6_txoptions
*opt_to_free
= NULL
;
1160 struct ip6_flowlabel
*flowlabel
= NULL
;
1162 struct dst_entry
*dst
;
1163 int addr_len
= msg
->msg_namelen
;
1168 int corkreq
= up
->corkflag
|| msg
->msg_flags
&MSG_MORE
;
1171 int is_udplite
= IS_UDPLITE(sk
);
1172 int (*getfrag
)(void *, char *, int, int, int, struct sk_buff
*);
1174 /* destination address check */
1176 if (addr_len
< offsetof(struct sockaddr
, sa_data
))
1179 switch (sin6
->sin6_family
) {
1181 if (addr_len
< SIN6_LEN_RFC2133
)
1183 daddr
= &sin6
->sin6_addr
;
1186 goto do_udp_sendmsg
;
1188 msg
->msg_name
= sin6
= NULL
;
1189 msg
->msg_namelen
= addr_len
= 0;
1195 } else if (!up
->pending
) {
1196 if (sk
->sk_state
!= TCP_ESTABLISHED
)
1197 return -EDESTADDRREQ
;
1198 daddr
= &sk
->sk_v6_daddr
;
1203 if (ipv6_addr_v4mapped(daddr
)) {
1204 struct sockaddr_in sin
;
1205 sin
.sin_family
= AF_INET
;
1206 sin
.sin_port
= sin6
? sin6
->sin6_port
: inet
->inet_dport
;
1207 sin
.sin_addr
.s_addr
= daddr
->s6_addr32
[3];
1208 msg
->msg_name
= &sin
;
1209 msg
->msg_namelen
= sizeof(sin
);
1211 if (__ipv6_only_sock(sk
))
1212 return -ENETUNREACH
;
1213 return udp_sendmsg(sk
, msg
, len
);
1217 if (up
->pending
== AF_INET
)
1218 return udp_sendmsg(sk
, msg
, len
);
1220 /* Rough check on arithmetic overflow,
1221 better check is made in ip6_append_data().
1223 if (len
> INT_MAX
- sizeof(struct udphdr
))
1226 getfrag
= is_udplite
? udplite_getfrag
: ip_generic_getfrag
;
1229 * There are pending frames.
1230 * The socket lock must be held while it's corked.
1233 if (likely(up
->pending
)) {
1234 if (unlikely(up
->pending
!= AF_INET6
)) {
1236 return -EAFNOSUPPORT
;
1239 goto do_append_data
;
1243 ulen
+= sizeof(struct udphdr
);
1245 memset(&fl6
, 0, sizeof(fl6
));
1248 if (sin6
->sin6_port
== 0)
1251 fl6
.fl6_dport
= sin6
->sin6_port
;
1252 daddr
= &sin6
->sin6_addr
;
1255 fl6
.flowlabel
= sin6
->sin6_flowinfo
&IPV6_FLOWINFO_MASK
;
1256 if (fl6
.flowlabel
&IPV6_FLOWLABEL_MASK
) {
1257 flowlabel
= fl6_sock_lookup(sk
, fl6
.flowlabel
);
1264 * Otherwise it will be difficult to maintain
1267 if (sk
->sk_state
== TCP_ESTABLISHED
&&
1268 ipv6_addr_equal(daddr
, &sk
->sk_v6_daddr
))
1269 daddr
= &sk
->sk_v6_daddr
;
1271 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
1272 sin6
->sin6_scope_id
&&
1273 __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr
)))
1274 fl6
.flowi6_oif
= sin6
->sin6_scope_id
;
1276 if (sk
->sk_state
!= TCP_ESTABLISHED
)
1277 return -EDESTADDRREQ
;
1279 fl6
.fl6_dport
= inet
->inet_dport
;
1280 daddr
= &sk
->sk_v6_daddr
;
1281 fl6
.flowlabel
= np
->flow_label
;
1285 if (!fl6
.flowi6_oif
)
1286 fl6
.flowi6_oif
= sk
->sk_bound_dev_if
;
1288 if (!fl6
.flowi6_oif
)
1289 fl6
.flowi6_oif
= np
->sticky_pktinfo
.ipi6_ifindex
;
1291 fl6
.flowi6_mark
= sk
->sk_mark
;
1293 if (msg
->msg_controllen
) {
1295 memset(opt
, 0, sizeof(struct ipv6_txoptions
));
1296 opt
->tot_len
= sizeof(*opt
);
1298 err
= ip6_datagram_send_ctl(sock_net(sk
), sk
, msg
, &fl6
, opt
,
1299 &hlimit
, &tclass
, &dontfrag
);
1301 fl6_sock_release(flowlabel
);
1304 if ((fl6
.flowlabel
&IPV6_FLOWLABEL_MASK
) && !flowlabel
) {
1305 flowlabel
= fl6_sock_lookup(sk
, fl6
.flowlabel
);
1309 if (!(opt
->opt_nflen
|opt
->opt_flen
))
1314 opt
= txopt_get(np
);
1318 opt
= fl6_merge_options(&opt_space
, flowlabel
, opt
);
1319 opt
= ipv6_fixup_options(&opt_space
, opt
);
1321 fl6
.flowi6_proto
= sk
->sk_protocol
;
1322 if (!ipv6_addr_any(daddr
))
1325 fl6
.daddr
.s6_addr
[15] = 0x1; /* :: means loopback (BSD'ism) */
1326 if (ipv6_addr_any(&fl6
.saddr
) && !ipv6_addr_any(&np
->saddr
))
1327 fl6
.saddr
= np
->saddr
;
1328 fl6
.fl6_sport
= inet
->inet_sport
;
1330 final_p
= fl6_update_dst(&fl6
, opt
, &final
);
1334 if (!fl6
.flowi6_oif
&& ipv6_addr_is_multicast(&fl6
.daddr
)) {
1335 fl6
.flowi6_oif
= np
->mcast_oif
;
1337 } else if (!fl6
.flowi6_oif
)
1338 fl6
.flowi6_oif
= np
->ucast_oif
;
1340 security_sk_classify_flow(sk
, flowi6_to_flowi(&fl6
));
1342 dst
= ip6_sk_dst_lookup_flow(sk
, &fl6
, final_p
);
1350 hlimit
= ip6_sk_dst_hoplimit(np
, &fl6
, dst
);
1353 tclass
= np
->tclass
;
1355 if (msg
->msg_flags
&MSG_CONFIRM
)
1359 /* Lockless fast path for the non-corking case */
1361 struct sk_buff
*skb
;
1363 skb
= ip6_make_skb(sk
, getfrag
, msg
, ulen
,
1364 sizeof(struct udphdr
), hlimit
, tclass
, opt
,
1365 &fl6
, (struct rt6_info
*)dst
,
1366 msg
->msg_flags
, dontfrag
);
1368 if (!IS_ERR_OR_NULL(skb
))
1369 err
= udp_v6_send_skb(skb
, &fl6
);
1374 if (unlikely(up
->pending
)) {
1375 /* The socket is already corked while preparing it. */
1376 /* ... which is an evident application bug. --ANK */
1379 net_dbg_ratelimited("udp cork app bug 2\n");
1384 up
->pending
= AF_INET6
;
1388 dontfrag
= np
->dontfrag
;
1390 err
= ip6_append_data(sk
, getfrag
, msg
, ulen
,
1391 sizeof(struct udphdr
), hlimit
, tclass
, opt
, &fl6
,
1392 (struct rt6_info
*)dst
,
1393 corkreq
? msg
->msg_flags
|MSG_MORE
: msg
->msg_flags
, dontfrag
);
1395 udp_v6_flush_pending_frames(sk
);
1397 err
= udp_v6_push_pending_frames(sk
);
1398 else if (unlikely(skb_queue_empty(&sk
->sk_write_queue
)))
1402 err
= np
->recverr
? net_xmit_errno(err
) : 0;
1408 ip6_dst_store(sk
, dst
,
1409 ipv6_addr_equal(&fl6
.daddr
, &sk
->sk_v6_daddr
) ?
1410 &sk
->sk_v6_daddr
: NULL
,
1411 #ifdef CONFIG_IPV6_SUBTREES
1412 ipv6_addr_equal(&fl6
.saddr
, &np
->saddr
) ?
1424 fl6_sock_release(flowlabel
);
1425 txopt_put(opt_to_free
);
1429 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
1430 * ENOBUFS might not be good (it's not tunable per se), but otherwise
1431 * we don't have a good statistic (IpOutDiscards but it can be too many
1432 * things). We could add another new stat but at least for now that
1433 * seems like overkill.
1435 if (err
== -ENOBUFS
|| test_bit(SOCK_NOSPACE
, &sk
->sk_socket
->flags
)) {
1436 UDP6_INC_STATS_USER(sock_net(sk
),
1437 UDP_MIB_SNDBUFERRORS
, is_udplite
);
1443 if (!(msg
->msg_flags
&MSG_PROBE
) || len
)
1444 goto back_from_confirm
;
1449 void udpv6_destroy_sock(struct sock
*sk
)
1451 struct udp_sock
*up
= udp_sk(sk
);
1453 udp_v6_flush_pending_frames(sk
);
1456 if (static_key_false(&udpv6_encap_needed
) && up
->encap_type
) {
1457 void (*encap_destroy
)(struct sock
*sk
);
1458 encap_destroy
= ACCESS_ONCE(up
->encap_destroy
);
1463 inet6_destroy_sock(sk
);
1467 * Socket option code for UDP
1469 int udpv6_setsockopt(struct sock
*sk
, int level
, int optname
,
1470 char __user
*optval
, unsigned int optlen
)
1472 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
1473 return udp_lib_setsockopt(sk
, level
, optname
, optval
, optlen
,
1474 udp_v6_push_pending_frames
);
1475 return ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
1478 #ifdef CONFIG_COMPAT
1479 int compat_udpv6_setsockopt(struct sock
*sk
, int level
, int optname
,
1480 char __user
*optval
, unsigned int optlen
)
1482 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
1483 return udp_lib_setsockopt(sk
, level
, optname
, optval
, optlen
,
1484 udp_v6_push_pending_frames
);
1485 return compat_ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
1489 int udpv6_getsockopt(struct sock
*sk
, int level
, int optname
,
1490 char __user
*optval
, int __user
*optlen
)
1492 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
1493 return udp_lib_getsockopt(sk
, level
, optname
, optval
, optlen
);
1494 return ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
1497 #ifdef CONFIG_COMPAT
1498 int compat_udpv6_getsockopt(struct sock
*sk
, int level
, int optname
,
1499 char __user
*optval
, int __user
*optlen
)
1501 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
1502 return udp_lib_getsockopt(sk
, level
, optname
, optval
, optlen
);
1503 return compat_ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
1507 static const struct inet6_protocol udpv6_protocol
= {
1508 .handler
= udpv6_rcv
,
1509 .err_handler
= udpv6_err
,
1510 .flags
= INET6_PROTO_NOPOLICY
|INET6_PROTO_FINAL
,
1513 /* ------------------------------------------------------------------------ */
1514 #ifdef CONFIG_PROC_FS
1515 int udp6_seq_show(struct seq_file
*seq
, void *v
)
1517 if (v
== SEQ_START_TOKEN
) {
1518 seq_puts(seq
, IPV6_SEQ_DGRAM_HEADER
);
1520 int bucket
= ((struct udp_iter_state
*)seq
->private)->bucket
;
1521 struct inet_sock
*inet
= inet_sk(v
);
1522 __u16 srcp
= ntohs(inet
->inet_sport
);
1523 __u16 destp
= ntohs(inet
->inet_dport
);
1524 ip6_dgram_sock_seq_show(seq
, v
, srcp
, destp
, bucket
);
1529 static const struct file_operations udp6_afinfo_seq_fops
= {
1530 .owner
= THIS_MODULE
,
1531 .open
= udp_seq_open
,
1533 .llseek
= seq_lseek
,
1534 .release
= seq_release_net
1537 static struct udp_seq_afinfo udp6_seq_afinfo
= {
1540 .udp_table
= &udp_table
,
1541 .seq_fops
= &udp6_afinfo_seq_fops
,
1543 .show
= udp6_seq_show
,
1547 int __net_init
udp6_proc_init(struct net
*net
)
1549 return udp_proc_register(net
, &udp6_seq_afinfo
);
1552 void udp6_proc_exit(struct net
*net
)
1554 udp_proc_unregister(net
, &udp6_seq_afinfo
);
1556 #endif /* CONFIG_PROC_FS */
1558 void udp_v6_clear_sk(struct sock
*sk
, int size
)
1560 struct inet_sock
*inet
= inet_sk(sk
);
1562 /* we do not want to clear pinet6 field, because of RCU lookups */
1563 sk_prot_clear_portaddr_nulls(sk
, offsetof(struct inet_sock
, pinet6
));
1565 size
-= offsetof(struct inet_sock
, pinet6
) + sizeof(inet
->pinet6
);
1566 memset(&inet
->pinet6
+ 1, 0, size
);
1569 /* ------------------------------------------------------------------------ */
1571 struct proto udpv6_prot
= {
1573 .owner
= THIS_MODULE
,
1574 .close
= udp_lib_close
,
1575 .connect
= ip6_datagram_connect
,
1576 .disconnect
= udp_disconnect
,
1578 .destroy
= udpv6_destroy_sock
,
1579 .setsockopt
= udpv6_setsockopt
,
1580 .getsockopt
= udpv6_getsockopt
,
1581 .sendmsg
= udpv6_sendmsg
,
1582 .recvmsg
= udpv6_recvmsg
,
1583 .backlog_rcv
= __udpv6_queue_rcv_skb
,
1584 .hash
= udp_lib_hash
,
1585 .unhash
= udp_lib_unhash
,
1586 .rehash
= udp_v6_rehash
,
1587 .get_port
= udp_v6_get_port
,
1588 .memory_allocated
= &udp_memory_allocated
,
1589 .sysctl_mem
= sysctl_udp_mem
,
1590 .sysctl_wmem
= &sysctl_udp_wmem_min
,
1591 .sysctl_rmem
= &sysctl_udp_rmem_min
,
1592 .obj_size
= sizeof(struct udp6_sock
),
1593 .slab_flags
= SLAB_DESTROY_BY_RCU
,
1594 .h
.udp_table
= &udp_table
,
1595 #ifdef CONFIG_COMPAT
1596 .compat_setsockopt
= compat_udpv6_setsockopt
,
1597 .compat_getsockopt
= compat_udpv6_getsockopt
,
1599 .clear_sk
= udp_v6_clear_sk
,
1602 static struct inet_protosw udpv6_protosw
= {
1604 .protocol
= IPPROTO_UDP
,
1605 .prot
= &udpv6_prot
,
1606 .ops
= &inet6_dgram_ops
,
1607 .flags
= INET_PROTOSW_PERMANENT
,
1610 int __init
udpv6_init(void)
1614 ret
= inet6_add_protocol(&udpv6_protocol
, IPPROTO_UDP
);
1618 ret
= inet6_register_protosw(&udpv6_protosw
);
1620 goto out_udpv6_protocol
;
1625 inet6_del_protocol(&udpv6_protocol
, IPPROTO_UDP
);
1629 void udpv6_exit(void)
1631 inet6_unregister_protosw(&udpv6_protosw
);
1632 inet6_del_protocol(&udpv6_protocol
, IPPROTO_UDP
);