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;
265 udp_portaddr_for_each_entry_rcu(sk
, node
, &hslot2
->head
) {
266 score
= compute_score2(sk
, net
, saddr
, sport
,
268 if (score
> badness
) {
271 reuseport
= sk
->sk_reuseport
;
274 hash
= udp6_ehashfn(net
, daddr
, hnum
,
276 sk2
= reuseport_select_sock(sk
, hash
, skb
,
277 sizeof(struct udphdr
));
284 } else if (score
== badness
&& reuseport
) {
286 if (reciprocal_scale(hash
, matches
) == 0)
288 hash
= next_pseudo_random32(hash
);
292 * if the nulls value we got at the end of this lookup is
293 * not the expected one, we must restart lookup.
294 * We probably met an item that was moved to another chain.
296 if (get_nulls_value(node
) != slot2
)
301 if (unlikely(!atomic_inc_not_zero_hint(&result
->sk_refcnt
, 2)))
303 else if (unlikely(compute_score2(result
, net
, saddr
, sport
,
304 daddr
, hnum
, dif
) < badness
)) {
312 struct sock
*__udp6_lib_lookup(struct net
*net
,
313 const struct in6_addr
*saddr
, __be16 sport
,
314 const struct in6_addr
*daddr
, __be16 dport
,
315 int dif
, struct udp_table
*udptable
,
318 struct sock
*sk
, *result
;
319 struct hlist_nulls_node
*node
;
320 unsigned short hnum
= ntohs(dport
);
321 unsigned int hash2
, slot2
, slot
= udp_hashfn(net
, hnum
, udptable
->mask
);
322 struct udp_hslot
*hslot2
, *hslot
= &udptable
->hash
[slot
];
323 int score
, badness
, matches
= 0, reuseport
= 0;
327 if (hslot
->count
> 10) {
328 hash2
= udp6_portaddr_hash(net
, daddr
, hnum
);
329 slot2
= hash2
& udptable
->mask
;
330 hslot2
= &udptable
->hash2
[slot2
];
331 if (hslot
->count
< hslot2
->count
)
334 result
= udp6_lib_lookup2(net
, saddr
, sport
,
338 hash2
= udp6_portaddr_hash(net
, &in6addr_any
, hnum
);
339 slot2
= hash2
& udptable
->mask
;
340 hslot2
= &udptable
->hash2
[slot2
];
341 if (hslot
->count
< hslot2
->count
)
344 result
= udp6_lib_lookup2(net
, saddr
, sport
,
345 &in6addr_any
, hnum
, dif
,
354 sk_nulls_for_each_rcu(sk
, node
, &hslot
->head
) {
355 score
= compute_score(sk
, net
, hnum
, saddr
, sport
, daddr
, dport
, dif
);
356 if (score
> badness
) {
359 reuseport
= sk
->sk_reuseport
;
362 hash
= udp6_ehashfn(net
, daddr
, hnum
,
364 sk2
= reuseport_select_sock(sk
, hash
, skb
,
365 sizeof(struct udphdr
));
372 } else if (score
== badness
&& reuseport
) {
374 if (reciprocal_scale(hash
, matches
) == 0)
376 hash
= next_pseudo_random32(hash
);
380 * if the nulls value we got at the end of this lookup is
381 * not the expected one, we must restart lookup.
382 * We probably met an item that was moved to another chain.
384 if (get_nulls_value(node
) != slot
)
389 if (unlikely(!atomic_inc_not_zero_hint(&result
->sk_refcnt
, 2)))
391 else if (unlikely(compute_score(result
, net
, hnum
, saddr
, sport
,
392 daddr
, dport
, dif
) < badness
)) {
400 EXPORT_SYMBOL_GPL(__udp6_lib_lookup
);
402 static struct sock
*__udp6_lib_lookup_skb(struct sk_buff
*skb
,
403 __be16 sport
, __be16 dport
,
404 struct udp_table
*udptable
)
407 const struct ipv6hdr
*iph
= ipv6_hdr(skb
);
409 sk
= skb_steal_sock(skb
);
412 return __udp6_lib_lookup(dev_net(skb_dst(skb
)->dev
), &iph
->saddr
, sport
,
413 &iph
->daddr
, dport
, inet6_iif(skb
),
417 struct sock
*udp6_lib_lookup(struct net
*net
, const struct in6_addr
*saddr
, __be16 sport
,
418 const struct in6_addr
*daddr
, __be16 dport
, int dif
)
420 return __udp6_lib_lookup(net
, saddr
, sport
, daddr
, dport
, dif
, &udp_table
, NULL
);
422 EXPORT_SYMBOL_GPL(udp6_lib_lookup
);
425 * This should be easy, if there is something there we
426 * return it, otherwise we block.
429 int udpv6_recvmsg(struct sock
*sk
, struct msghdr
*msg
, size_t len
,
430 int noblock
, int flags
, int *addr_len
)
432 struct ipv6_pinfo
*np
= inet6_sk(sk
);
433 struct inet_sock
*inet
= inet_sk(sk
);
435 unsigned int ulen
, copied
;
438 int is_udplite
= IS_UDPLITE(sk
);
439 bool checksum_valid
= false;
443 if (flags
& MSG_ERRQUEUE
)
444 return ipv6_recv_error(sk
, msg
, len
, addr_len
);
446 if (np
->rxpmtu
&& np
->rxopt
.bits
.rxpmtu
)
447 return ipv6_recv_rxpmtu(sk
, msg
, len
, addr_len
);
450 skb
= __skb_recv_datagram(sk
, flags
| (noblock
? MSG_DONTWAIT
: 0),
451 &peeked
, &off
, &err
);
455 ulen
= skb
->len
- sizeof(struct udphdr
);
459 else if (copied
< ulen
)
460 msg
->msg_flags
|= MSG_TRUNC
;
462 is_udp4
= (skb
->protocol
== htons(ETH_P_IP
));
465 * If checksum is needed at all, try to do it while copying the
466 * data. If the data is truncated, or if we only want a partial
467 * coverage checksum (UDP-Lite), do it before the copy.
470 if (copied
< ulen
|| UDP_SKB_CB(skb
)->partial_cov
) {
471 checksum_valid
= !udp_lib_checksum_complete(skb
);
476 if (checksum_valid
|| skb_csum_unnecessary(skb
))
477 err
= skb_copy_datagram_msg(skb
, sizeof(struct udphdr
),
480 err
= skb_copy_and_csum_datagram_msg(skb
, sizeof(struct udphdr
), msg
);
485 trace_kfree_skb(skb
, udpv6_recvmsg
);
487 atomic_inc(&sk
->sk_drops
);
489 UDP_INC_STATS_USER(sock_net(sk
),
493 UDP6_INC_STATS_USER(sock_net(sk
),
501 UDP_INC_STATS_USER(sock_net(sk
),
502 UDP_MIB_INDATAGRAMS
, is_udplite
);
504 UDP6_INC_STATS_USER(sock_net(sk
),
505 UDP_MIB_INDATAGRAMS
, is_udplite
);
508 sock_recv_ts_and_drops(msg
, sk
, skb
);
510 /* Copy the address. */
512 DECLARE_SOCKADDR(struct sockaddr_in6
*, sin6
, msg
->msg_name
);
513 sin6
->sin6_family
= AF_INET6
;
514 sin6
->sin6_port
= udp_hdr(skb
)->source
;
515 sin6
->sin6_flowinfo
= 0;
518 ipv6_addr_set_v4mapped(ip_hdr(skb
)->saddr
,
520 sin6
->sin6_scope_id
= 0;
522 sin6
->sin6_addr
= ipv6_hdr(skb
)->saddr
;
523 sin6
->sin6_scope_id
=
524 ipv6_iface_scope_id(&sin6
->sin6_addr
,
527 *addr_len
= sizeof(*sin6
);
531 ip6_datagram_recv_common_ctl(sk
, msg
, skb
);
534 if (inet
->cmsg_flags
)
535 ip_cmsg_recv(msg
, skb
);
538 ip6_datagram_recv_specific_ctl(sk
, msg
, skb
);
542 if (flags
& MSG_TRUNC
)
546 skb_free_datagram_locked(sk
, skb
);
551 slow
= lock_sock_fast(sk
);
552 if (!skb_kill_datagram(sk
, skb
, flags
)) {
554 UDP_INC_STATS_USER(sock_net(sk
),
555 UDP_MIB_CSUMERRORS
, is_udplite
);
556 UDP_INC_STATS_USER(sock_net(sk
),
557 UDP_MIB_INERRORS
, is_udplite
);
559 UDP6_INC_STATS_USER(sock_net(sk
),
560 UDP_MIB_CSUMERRORS
, is_udplite
);
561 UDP6_INC_STATS_USER(sock_net(sk
),
562 UDP_MIB_INERRORS
, is_udplite
);
565 unlock_sock_fast(sk
, slow
);
567 /* starting over for a new packet, but check if we need to yield */
569 msg
->msg_flags
&= ~MSG_TRUNC
;
573 void __udp6_lib_err(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
574 u8 type
, u8 code
, int offset
, __be32 info
,
575 struct udp_table
*udptable
)
577 struct ipv6_pinfo
*np
;
578 const struct ipv6hdr
*hdr
= (const struct ipv6hdr
*)skb
->data
;
579 const struct in6_addr
*saddr
= &hdr
->saddr
;
580 const struct in6_addr
*daddr
= &hdr
->daddr
;
581 struct udphdr
*uh
= (struct udphdr
*)(skb
->data
+offset
);
584 struct net
*net
= dev_net(skb
->dev
);
586 sk
= __udp6_lib_lookup(net
, daddr
, uh
->dest
, saddr
, uh
->source
,
587 inet6_iif(skb
), udptable
, skb
);
589 ICMP6_INC_STATS_BH(net
, __in6_dev_get(skb
->dev
),
594 if (type
== ICMPV6_PKT_TOOBIG
) {
595 if (!ip6_sk_accept_pmtu(sk
))
597 ip6_sk_update_pmtu(skb
, sk
, info
);
599 if (type
== NDISC_REDIRECT
) {
600 ip6_sk_redirect(skb
, sk
);
606 if (!icmpv6_err_convert(type
, code
, &err
) && !np
->recverr
)
609 if (sk
->sk_state
!= TCP_ESTABLISHED
&& !np
->recverr
)
613 ipv6_icmp_error(sk
, skb
, err
, uh
->dest
, ntohl(info
), (u8
*)(uh
+1));
616 sk
->sk_error_report(sk
);
621 static int __udpv6_queue_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
625 if (!ipv6_addr_any(&sk
->sk_v6_daddr
)) {
626 sock_rps_save_rxhash(sk
, skb
);
627 sk_mark_napi_id(sk
, skb
);
628 sk_incoming_cpu_update(sk
);
631 rc
= sock_queue_rcv_skb(sk
, skb
);
633 int is_udplite
= IS_UDPLITE(sk
);
635 /* Note that an ENOMEM error is charged twice */
637 UDP6_INC_STATS_BH(sock_net(sk
),
638 UDP_MIB_RCVBUFERRORS
, is_udplite
);
639 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_INERRORS
, is_udplite
);
646 static __inline__
void udpv6_err(struct sk_buff
*skb
,
647 struct inet6_skb_parm
*opt
, u8 type
,
648 u8 code
, int offset
, __be32 info
)
650 __udp6_lib_err(skb
, opt
, type
, code
, offset
, info
, &udp_table
);
653 static struct static_key udpv6_encap_needed __read_mostly
;
654 void udpv6_encap_enable(void)
656 if (!static_key_enabled(&udpv6_encap_needed
))
657 static_key_slow_inc(&udpv6_encap_needed
);
659 EXPORT_SYMBOL(udpv6_encap_enable
);
661 int udpv6_queue_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
663 struct udp_sock
*up
= udp_sk(sk
);
665 int is_udplite
= IS_UDPLITE(sk
);
667 if (!xfrm6_policy_check(sk
, XFRM_POLICY_IN
, skb
))
670 if (static_key_false(&udpv6_encap_needed
) && up
->encap_type
) {
671 int (*encap_rcv
)(struct sock
*sk
, struct sk_buff
*skb
);
674 * This is an encapsulation socket so pass the skb to
675 * the socket's udp_encap_rcv() hook. Otherwise, just
676 * fall through and pass this up the UDP socket.
677 * up->encap_rcv() returns the following value:
678 * =0 if skb was successfully passed to the encap
679 * handler or was discarded by it.
680 * >0 if skb should be passed on to UDP.
681 * <0 if skb should be resubmitted as proto -N
684 /* if we're overly short, let UDP handle it */
685 encap_rcv
= ACCESS_ONCE(up
->encap_rcv
);
686 if (skb
->len
> sizeof(struct udphdr
) && encap_rcv
) {
689 /* Verify checksum before giving to encap */
690 if (udp_lib_checksum_complete(skb
))
693 ret
= encap_rcv(sk
, skb
);
695 UDP_INC_STATS_BH(sock_net(sk
),
702 /* FALLTHROUGH -- it's a UDP Packet */
706 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
708 if ((is_udplite
& UDPLITE_RECV_CC
) && UDP_SKB_CB(skb
)->partial_cov
) {
710 if (up
->pcrlen
== 0) { /* full coverage was set */
711 net_dbg_ratelimited("UDPLITE6: partial coverage %d while full coverage %d requested\n",
712 UDP_SKB_CB(skb
)->cscov
, skb
->len
);
715 if (UDP_SKB_CB(skb
)->cscov
< up
->pcrlen
) {
716 net_dbg_ratelimited("UDPLITE6: coverage %d too small, need min %d\n",
717 UDP_SKB_CB(skb
)->cscov
, up
->pcrlen
);
722 if (rcu_access_pointer(sk
->sk_filter
)) {
723 if (udp_lib_checksum_complete(skb
))
727 if (sk_rcvqueues_full(sk
, sk
->sk_rcvbuf
)) {
728 UDP6_INC_STATS_BH(sock_net(sk
),
729 UDP_MIB_RCVBUFERRORS
, is_udplite
);
737 if (!sock_owned_by_user(sk
))
738 rc
= __udpv6_queue_rcv_skb(sk
, skb
);
739 else if (sk_add_backlog(sk
, skb
, sk
->sk_rcvbuf
)) {
748 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_CSUMERRORS
, is_udplite
);
750 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_INERRORS
, is_udplite
);
751 atomic_inc(&sk
->sk_drops
);
756 static bool __udp_v6_is_mcast_sock(struct net
*net
, struct sock
*sk
,
757 __be16 loc_port
, const struct in6_addr
*loc_addr
,
758 __be16 rmt_port
, const struct in6_addr
*rmt_addr
,
759 int dif
, unsigned short hnum
)
761 struct inet_sock
*inet
= inet_sk(sk
);
763 if (!net_eq(sock_net(sk
), net
))
766 if (udp_sk(sk
)->udp_port_hash
!= hnum
||
767 sk
->sk_family
!= PF_INET6
||
768 (inet
->inet_dport
&& inet
->inet_dport
!= rmt_port
) ||
769 (!ipv6_addr_any(&sk
->sk_v6_daddr
) &&
770 !ipv6_addr_equal(&sk
->sk_v6_daddr
, rmt_addr
)) ||
771 (sk
->sk_bound_dev_if
&& sk
->sk_bound_dev_if
!= dif
) ||
772 (!ipv6_addr_any(&sk
->sk_v6_rcv_saddr
) &&
773 !ipv6_addr_equal(&sk
->sk_v6_rcv_saddr
, loc_addr
)))
775 if (!inet6_mc_check(sk
, loc_addr
, rmt_addr
))
780 static void flush_stack(struct sock
**stack
, unsigned int count
,
781 struct sk_buff
*skb
, unsigned int final
)
783 struct sk_buff
*skb1
= NULL
;
787 for (i
= 0; i
< count
; i
++) {
790 skb1
= (i
== final
) ? skb
: skb_clone(skb
, GFP_ATOMIC
);
792 atomic_inc(&sk
->sk_drops
);
793 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_RCVBUFERRORS
,
795 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_INERRORS
,
799 if (skb1
&& udpv6_queue_rcv_skb(sk
, skb1
) <= 0)
807 static void udp6_csum_zero_error(struct sk_buff
*skb
)
809 /* RFC 2460 section 8.1 says that we SHOULD log
810 * this error. Well, it is reasonable.
812 net_dbg_ratelimited("IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n",
813 &ipv6_hdr(skb
)->saddr
, ntohs(udp_hdr(skb
)->source
),
814 &ipv6_hdr(skb
)->daddr
, ntohs(udp_hdr(skb
)->dest
));
818 * Note: called only from the BH handler context,
819 * so we don't need to lock the hashes.
821 static int __udp6_lib_mcast_deliver(struct net
*net
, struct sk_buff
*skb
,
822 const struct in6_addr
*saddr
, const struct in6_addr
*daddr
,
823 struct udp_table
*udptable
, int proto
)
825 struct sock
*sk
, *stack
[256 / sizeof(struct sock
*)];
826 const struct udphdr
*uh
= udp_hdr(skb
);
827 struct hlist_nulls_node
*node
;
828 unsigned short hnum
= ntohs(uh
->dest
);
829 struct udp_hslot
*hslot
= udp_hashslot(udptable
, net
, hnum
);
830 int dif
= inet6_iif(skb
);
831 unsigned int count
= 0, offset
= offsetof(typeof(*sk
), sk_nulls_node
);
832 unsigned int hash2
= 0, hash2_any
= 0, use_hash2
= (hslot
->count
> 10);
833 bool inner_flushed
= false;
836 hash2_any
= udp6_portaddr_hash(net
, &in6addr_any
, hnum
) &
838 hash2
= udp6_portaddr_hash(net
, daddr
, hnum
) & udp_table
.mask
;
840 hslot
= &udp_table
.hash2
[hash2
];
841 offset
= offsetof(typeof(*sk
), __sk_common
.skc_portaddr_node
);
844 spin_lock(&hslot
->lock
);
845 sk_nulls_for_each_entry_offset(sk
, node
, &hslot
->head
, offset
) {
846 if (__udp_v6_is_mcast_sock(net
, sk
,
850 /* If zero checksum and no_check is not on for
851 * the socket then skip it.
853 (uh
->check
|| udp_sk(sk
)->no_check6_rx
)) {
854 if (unlikely(count
== ARRAY_SIZE(stack
))) {
855 flush_stack(stack
, count
, skb
, ~0);
856 inner_flushed
= true;
864 spin_unlock(&hslot
->lock
);
866 /* Also lookup *:port if we are using hash2 and haven't done so yet. */
867 if (use_hash2
&& hash2
!= hash2_any
) {
873 flush_stack(stack
, count
, skb
, count
- 1);
876 UDP_INC_STATS_BH(net
, UDP_MIB_IGNOREDMULTI
,
877 proto
== IPPROTO_UDPLITE
);
883 int __udp6_lib_rcv(struct sk_buff
*skb
, struct udp_table
*udptable
,
886 struct net
*net
= dev_net(skb
->dev
);
889 const struct in6_addr
*saddr
, *daddr
;
892 if (!pskb_may_pull(skb
, sizeof(struct udphdr
)))
895 saddr
= &ipv6_hdr(skb
)->saddr
;
896 daddr
= &ipv6_hdr(skb
)->daddr
;
899 ulen
= ntohs(uh
->len
);
903 if (proto
== IPPROTO_UDP
) {
904 /* UDP validates ulen. */
906 /* Check for jumbo payload */
910 if (ulen
< sizeof(*uh
))
913 if (ulen
< skb
->len
) {
914 if (pskb_trim_rcsum(skb
, ulen
))
916 saddr
= &ipv6_hdr(skb
)->saddr
;
917 daddr
= &ipv6_hdr(skb
)->daddr
;
922 if (udp6_csum_init(skb
, uh
, proto
))
926 * Multicast receive code
928 if (ipv6_addr_is_multicast(daddr
))
929 return __udp6_lib_mcast_deliver(net
, skb
,
930 saddr
, daddr
, udptable
, proto
);
935 * check socket cache ... must talk to Alan about his plans
936 * for sock caches... i'll skip this for now.
938 sk
= __udp6_lib_lookup_skb(skb
, uh
->source
, uh
->dest
, udptable
);
942 if (!uh
->check
&& !udp_sk(sk
)->no_check6_rx
) {
944 udp6_csum_zero_error(skb
);
948 if (inet_get_convert_csum(sk
) && uh
->check
&& !IS_UDPLITE(sk
))
949 skb_checksum_try_convert(skb
, IPPROTO_UDP
, uh
->check
,
952 ret
= udpv6_queue_rcv_skb(sk
, skb
);
955 /* a return value > 0 means to resubmit the input, but
956 * it wants the return to be -protocol, or 0
965 udp6_csum_zero_error(skb
);
969 if (!xfrm6_policy_check(NULL
, XFRM_POLICY_IN
, skb
))
972 if (udp_lib_checksum_complete(skb
))
975 UDP6_INC_STATS_BH(net
, UDP_MIB_NOPORTS
, proto
== IPPROTO_UDPLITE
);
976 icmpv6_send(skb
, ICMPV6_DEST_UNREACH
, ICMPV6_PORT_UNREACH
, 0);
982 net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n",
983 proto
== IPPROTO_UDPLITE
? "-Lite" : "",
984 saddr
, ntohs(uh
->source
),
986 daddr
, ntohs(uh
->dest
));
989 UDP6_INC_STATS_BH(net
, UDP_MIB_CSUMERRORS
, proto
== IPPROTO_UDPLITE
);
991 UDP6_INC_STATS_BH(net
, UDP_MIB_INERRORS
, proto
== IPPROTO_UDPLITE
);
996 static __inline__
int udpv6_rcv(struct sk_buff
*skb
)
998 return __udp6_lib_rcv(skb
, &udp_table
, IPPROTO_UDP
);
1002 * Throw away all pending data and cancel the corking. Socket is locked.
1004 static void udp_v6_flush_pending_frames(struct sock
*sk
)
1006 struct udp_sock
*up
= udp_sk(sk
);
1008 if (up
->pending
== AF_INET
)
1009 udp_flush_pending_frames(sk
);
1010 else if (up
->pending
) {
1013 ip6_flush_pending_frames(sk
);
1018 * udp6_hwcsum_outgoing - handle outgoing HW checksumming
1019 * @sk: socket we are sending on
1020 * @skb: sk_buff containing the filled-in UDP header
1021 * (checksum field must be zeroed out)
1023 static void udp6_hwcsum_outgoing(struct sock
*sk
, struct sk_buff
*skb
,
1024 const struct in6_addr
*saddr
,
1025 const struct in6_addr
*daddr
, int len
)
1027 unsigned int offset
;
1028 struct udphdr
*uh
= udp_hdr(skb
);
1029 struct sk_buff
*frags
= skb_shinfo(skb
)->frag_list
;
1033 /* Only one fragment on the socket. */
1034 skb
->csum_start
= skb_transport_header(skb
) - skb
->head
;
1035 skb
->csum_offset
= offsetof(struct udphdr
, check
);
1036 uh
->check
= ~csum_ipv6_magic(saddr
, daddr
, len
, IPPROTO_UDP
, 0);
1039 * HW-checksum won't work as there are two or more
1040 * fragments on the socket so that all csums of sk_buffs
1041 * should be together
1043 offset
= skb_transport_offset(skb
);
1044 skb
->csum
= skb_checksum(skb
, offset
, skb
->len
- offset
, 0);
1046 skb
->ip_summed
= CHECKSUM_NONE
;
1049 csum
= csum_add(csum
, frags
->csum
);
1050 } while ((frags
= frags
->next
));
1052 uh
->check
= csum_ipv6_magic(saddr
, daddr
, len
, IPPROTO_UDP
,
1055 uh
->check
= CSUM_MANGLED_0
;
1063 static int udp_v6_send_skb(struct sk_buff
*skb
, struct flowi6
*fl6
)
1065 struct sock
*sk
= skb
->sk
;
1068 int is_udplite
= IS_UDPLITE(sk
);
1070 int offset
= skb_transport_offset(skb
);
1071 int len
= skb
->len
- offset
;
1074 * Create a UDP header
1077 uh
->source
= fl6
->fl6_sport
;
1078 uh
->dest
= fl6
->fl6_dport
;
1079 uh
->len
= htons(len
);
1083 csum
= udplite_csum(skb
);
1084 else if (udp_sk(sk
)->no_check6_tx
) { /* UDP csum disabled */
1085 skb
->ip_summed
= CHECKSUM_NONE
;
1087 } else if (skb
->ip_summed
== CHECKSUM_PARTIAL
) { /* UDP hardware csum */
1088 udp6_hwcsum_outgoing(sk
, skb
, &fl6
->saddr
, &fl6
->daddr
, len
);
1091 csum
= udp_csum(skb
);
1093 /* add protocol-dependent pseudo-header */
1094 uh
->check
= csum_ipv6_magic(&fl6
->saddr
, &fl6
->daddr
,
1095 len
, fl6
->flowi6_proto
, csum
);
1097 uh
->check
= CSUM_MANGLED_0
;
1100 err
= ip6_send_skb(skb
);
1102 if (err
== -ENOBUFS
&& !inet6_sk(sk
)->recverr
) {
1103 UDP6_INC_STATS_USER(sock_net(sk
),
1104 UDP_MIB_SNDBUFERRORS
, is_udplite
);
1108 UDP6_INC_STATS_USER(sock_net(sk
),
1109 UDP_MIB_OUTDATAGRAMS
, is_udplite
);
1113 static int udp_v6_push_pending_frames(struct sock
*sk
)
1115 struct sk_buff
*skb
;
1116 struct udp_sock
*up
= udp_sk(sk
);
1120 if (up
->pending
== AF_INET
)
1121 return udp_push_pending_frames(sk
);
1123 /* ip6_finish_skb will release the cork, so make a copy of
1126 fl6
= inet_sk(sk
)->cork
.fl
.u
.ip6
;
1128 skb
= ip6_finish_skb(sk
);
1132 err
= udp_v6_send_skb(skb
, &fl6
);
1140 int udpv6_sendmsg(struct sock
*sk
, struct msghdr
*msg
, size_t len
)
1142 struct ipv6_txoptions opt_space
;
1143 struct udp_sock
*up
= udp_sk(sk
);
1144 struct inet_sock
*inet
= inet_sk(sk
);
1145 struct ipv6_pinfo
*np
= inet6_sk(sk
);
1146 DECLARE_SOCKADDR(struct sockaddr_in6
*, sin6
, msg
->msg_name
);
1147 struct in6_addr
*daddr
, *final_p
, final
;
1148 struct ipv6_txoptions
*opt
= NULL
;
1149 struct ipv6_txoptions
*opt_to_free
= NULL
;
1150 struct ip6_flowlabel
*flowlabel
= NULL
;
1152 struct dst_entry
*dst
;
1153 int addr_len
= msg
->msg_namelen
;
1158 int corkreq
= up
->corkflag
|| msg
->msg_flags
&MSG_MORE
;
1161 int is_udplite
= IS_UDPLITE(sk
);
1162 int (*getfrag
)(void *, char *, int, int, int, struct sk_buff
*);
1164 /* destination address check */
1166 if (addr_len
< offsetof(struct sockaddr
, sa_data
))
1169 switch (sin6
->sin6_family
) {
1171 if (addr_len
< SIN6_LEN_RFC2133
)
1173 daddr
= &sin6
->sin6_addr
;
1176 goto do_udp_sendmsg
;
1178 msg
->msg_name
= sin6
= NULL
;
1179 msg
->msg_namelen
= addr_len
= 0;
1185 } else if (!up
->pending
) {
1186 if (sk
->sk_state
!= TCP_ESTABLISHED
)
1187 return -EDESTADDRREQ
;
1188 daddr
= &sk
->sk_v6_daddr
;
1193 if (ipv6_addr_v4mapped(daddr
)) {
1194 struct sockaddr_in sin
;
1195 sin
.sin_family
= AF_INET
;
1196 sin
.sin_port
= sin6
? sin6
->sin6_port
: inet
->inet_dport
;
1197 sin
.sin_addr
.s_addr
= daddr
->s6_addr32
[3];
1198 msg
->msg_name
= &sin
;
1199 msg
->msg_namelen
= sizeof(sin
);
1201 if (__ipv6_only_sock(sk
))
1202 return -ENETUNREACH
;
1203 return udp_sendmsg(sk
, msg
, len
);
1207 if (up
->pending
== AF_INET
)
1208 return udp_sendmsg(sk
, msg
, len
);
1210 /* Rough check on arithmetic overflow,
1211 better check is made in ip6_append_data().
1213 if (len
> INT_MAX
- sizeof(struct udphdr
))
1216 getfrag
= is_udplite
? udplite_getfrag
: ip_generic_getfrag
;
1219 * There are pending frames.
1220 * The socket lock must be held while it's corked.
1223 if (likely(up
->pending
)) {
1224 if (unlikely(up
->pending
!= AF_INET6
)) {
1226 return -EAFNOSUPPORT
;
1229 goto do_append_data
;
1233 ulen
+= sizeof(struct udphdr
);
1235 memset(&fl6
, 0, sizeof(fl6
));
1238 if (sin6
->sin6_port
== 0)
1241 fl6
.fl6_dport
= sin6
->sin6_port
;
1242 daddr
= &sin6
->sin6_addr
;
1245 fl6
.flowlabel
= sin6
->sin6_flowinfo
&IPV6_FLOWINFO_MASK
;
1246 if (fl6
.flowlabel
&IPV6_FLOWLABEL_MASK
) {
1247 flowlabel
= fl6_sock_lookup(sk
, fl6
.flowlabel
);
1254 * Otherwise it will be difficult to maintain
1257 if (sk
->sk_state
== TCP_ESTABLISHED
&&
1258 ipv6_addr_equal(daddr
, &sk
->sk_v6_daddr
))
1259 daddr
= &sk
->sk_v6_daddr
;
1261 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
1262 sin6
->sin6_scope_id
&&
1263 __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr
)))
1264 fl6
.flowi6_oif
= sin6
->sin6_scope_id
;
1266 if (sk
->sk_state
!= TCP_ESTABLISHED
)
1267 return -EDESTADDRREQ
;
1269 fl6
.fl6_dport
= inet
->inet_dport
;
1270 daddr
= &sk
->sk_v6_daddr
;
1271 fl6
.flowlabel
= np
->flow_label
;
1275 if (!fl6
.flowi6_oif
)
1276 fl6
.flowi6_oif
= sk
->sk_bound_dev_if
;
1278 if (!fl6
.flowi6_oif
)
1279 fl6
.flowi6_oif
= np
->sticky_pktinfo
.ipi6_ifindex
;
1281 fl6
.flowi6_mark
= sk
->sk_mark
;
1283 if (msg
->msg_controllen
) {
1285 memset(opt
, 0, sizeof(struct ipv6_txoptions
));
1286 opt
->tot_len
= sizeof(*opt
);
1288 err
= ip6_datagram_send_ctl(sock_net(sk
), sk
, msg
, &fl6
, opt
,
1289 &hlimit
, &tclass
, &dontfrag
);
1291 fl6_sock_release(flowlabel
);
1294 if ((fl6
.flowlabel
&IPV6_FLOWLABEL_MASK
) && !flowlabel
) {
1295 flowlabel
= fl6_sock_lookup(sk
, fl6
.flowlabel
);
1299 if (!(opt
->opt_nflen
|opt
->opt_flen
))
1304 opt
= txopt_get(np
);
1308 opt
= fl6_merge_options(&opt_space
, flowlabel
, opt
);
1309 opt
= ipv6_fixup_options(&opt_space
, opt
);
1311 fl6
.flowi6_proto
= sk
->sk_protocol
;
1312 if (!ipv6_addr_any(daddr
))
1315 fl6
.daddr
.s6_addr
[15] = 0x1; /* :: means loopback (BSD'ism) */
1316 if (ipv6_addr_any(&fl6
.saddr
) && !ipv6_addr_any(&np
->saddr
))
1317 fl6
.saddr
= np
->saddr
;
1318 fl6
.fl6_sport
= inet
->inet_sport
;
1320 final_p
= fl6_update_dst(&fl6
, opt
, &final
);
1324 if (!fl6
.flowi6_oif
&& ipv6_addr_is_multicast(&fl6
.daddr
)) {
1325 fl6
.flowi6_oif
= np
->mcast_oif
;
1327 } else if (!fl6
.flowi6_oif
)
1328 fl6
.flowi6_oif
= np
->ucast_oif
;
1330 security_sk_classify_flow(sk
, flowi6_to_flowi(&fl6
));
1332 dst
= ip6_sk_dst_lookup_flow(sk
, &fl6
, final_p
);
1340 hlimit
= ip6_sk_dst_hoplimit(np
, &fl6
, dst
);
1343 tclass
= np
->tclass
;
1345 if (msg
->msg_flags
&MSG_CONFIRM
)
1349 /* Lockless fast path for the non-corking case */
1351 struct sk_buff
*skb
;
1353 skb
= ip6_make_skb(sk
, getfrag
, msg
, ulen
,
1354 sizeof(struct udphdr
), hlimit
, tclass
, opt
,
1355 &fl6
, (struct rt6_info
*)dst
,
1356 msg
->msg_flags
, dontfrag
);
1358 if (!IS_ERR_OR_NULL(skb
))
1359 err
= udp_v6_send_skb(skb
, &fl6
);
1364 if (unlikely(up
->pending
)) {
1365 /* The socket is already corked while preparing it. */
1366 /* ... which is an evident application bug. --ANK */
1369 net_dbg_ratelimited("udp cork app bug 2\n");
1374 up
->pending
= AF_INET6
;
1378 dontfrag
= np
->dontfrag
;
1380 err
= ip6_append_data(sk
, getfrag
, msg
, ulen
,
1381 sizeof(struct udphdr
), hlimit
, tclass
, opt
, &fl6
,
1382 (struct rt6_info
*)dst
,
1383 corkreq
? msg
->msg_flags
|MSG_MORE
: msg
->msg_flags
, dontfrag
);
1385 udp_v6_flush_pending_frames(sk
);
1387 err
= udp_v6_push_pending_frames(sk
);
1388 else if (unlikely(skb_queue_empty(&sk
->sk_write_queue
)))
1392 err
= np
->recverr
? net_xmit_errno(err
) : 0;
1398 ip6_dst_store(sk
, dst
,
1399 ipv6_addr_equal(&fl6
.daddr
, &sk
->sk_v6_daddr
) ?
1400 &sk
->sk_v6_daddr
: NULL
,
1401 #ifdef CONFIG_IPV6_SUBTREES
1402 ipv6_addr_equal(&fl6
.saddr
, &np
->saddr
) ?
1414 fl6_sock_release(flowlabel
);
1415 txopt_put(opt_to_free
);
1419 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
1420 * ENOBUFS might not be good (it's not tunable per se), but otherwise
1421 * we don't have a good statistic (IpOutDiscards but it can be too many
1422 * things). We could add another new stat but at least for now that
1423 * seems like overkill.
1425 if (err
== -ENOBUFS
|| test_bit(SOCK_NOSPACE
, &sk
->sk_socket
->flags
)) {
1426 UDP6_INC_STATS_USER(sock_net(sk
),
1427 UDP_MIB_SNDBUFERRORS
, is_udplite
);
1433 if (!(msg
->msg_flags
&MSG_PROBE
) || len
)
1434 goto back_from_confirm
;
1439 void udpv6_destroy_sock(struct sock
*sk
)
1441 struct udp_sock
*up
= udp_sk(sk
);
1443 udp_v6_flush_pending_frames(sk
);
1446 if (static_key_false(&udpv6_encap_needed
) && up
->encap_type
) {
1447 void (*encap_destroy
)(struct sock
*sk
);
1448 encap_destroy
= ACCESS_ONCE(up
->encap_destroy
);
1453 inet6_destroy_sock(sk
);
1457 * Socket option code for UDP
1459 int udpv6_setsockopt(struct sock
*sk
, int level
, int optname
,
1460 char __user
*optval
, unsigned int optlen
)
1462 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
1463 return udp_lib_setsockopt(sk
, level
, optname
, optval
, optlen
,
1464 udp_v6_push_pending_frames
);
1465 return ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
1468 #ifdef CONFIG_COMPAT
1469 int compat_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 compat_ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
1479 int udpv6_getsockopt(struct sock
*sk
, int level
, int optname
,
1480 char __user
*optval
, int __user
*optlen
)
1482 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
1483 return udp_lib_getsockopt(sk
, level
, optname
, optval
, optlen
);
1484 return ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
1487 #ifdef CONFIG_COMPAT
1488 int compat_udpv6_getsockopt(struct sock
*sk
, int level
, int optname
,
1489 char __user
*optval
, int __user
*optlen
)
1491 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
1492 return udp_lib_getsockopt(sk
, level
, optname
, optval
, optlen
);
1493 return compat_ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
1497 static const struct inet6_protocol udpv6_protocol
= {
1498 .handler
= udpv6_rcv
,
1499 .err_handler
= udpv6_err
,
1500 .flags
= INET6_PROTO_NOPOLICY
|INET6_PROTO_FINAL
,
1503 /* ------------------------------------------------------------------------ */
1504 #ifdef CONFIG_PROC_FS
1505 int udp6_seq_show(struct seq_file
*seq
, void *v
)
1507 if (v
== SEQ_START_TOKEN
) {
1508 seq_puts(seq
, IPV6_SEQ_DGRAM_HEADER
);
1510 int bucket
= ((struct udp_iter_state
*)seq
->private)->bucket
;
1511 struct inet_sock
*inet
= inet_sk(v
);
1512 __u16 srcp
= ntohs(inet
->inet_sport
);
1513 __u16 destp
= ntohs(inet
->inet_dport
);
1514 ip6_dgram_sock_seq_show(seq
, v
, srcp
, destp
, bucket
);
1519 static const struct file_operations udp6_afinfo_seq_fops
= {
1520 .owner
= THIS_MODULE
,
1521 .open
= udp_seq_open
,
1523 .llseek
= seq_lseek
,
1524 .release
= seq_release_net
1527 static struct udp_seq_afinfo udp6_seq_afinfo
= {
1530 .udp_table
= &udp_table
,
1531 .seq_fops
= &udp6_afinfo_seq_fops
,
1533 .show
= udp6_seq_show
,
1537 int __net_init
udp6_proc_init(struct net
*net
)
1539 return udp_proc_register(net
, &udp6_seq_afinfo
);
1542 void udp6_proc_exit(struct net
*net
)
1544 udp_proc_unregister(net
, &udp6_seq_afinfo
);
1546 #endif /* CONFIG_PROC_FS */
1548 void udp_v6_clear_sk(struct sock
*sk
, int size
)
1550 struct inet_sock
*inet
= inet_sk(sk
);
1552 /* we do not want to clear pinet6 field, because of RCU lookups */
1553 sk_prot_clear_portaddr_nulls(sk
, offsetof(struct inet_sock
, pinet6
));
1555 size
-= offsetof(struct inet_sock
, pinet6
) + sizeof(inet
->pinet6
);
1556 memset(&inet
->pinet6
+ 1, 0, size
);
1559 /* ------------------------------------------------------------------------ */
1561 struct proto udpv6_prot
= {
1563 .owner
= THIS_MODULE
,
1564 .close
= udp_lib_close
,
1565 .connect
= ip6_datagram_connect
,
1566 .disconnect
= udp_disconnect
,
1568 .destroy
= udpv6_destroy_sock
,
1569 .setsockopt
= udpv6_setsockopt
,
1570 .getsockopt
= udpv6_getsockopt
,
1571 .sendmsg
= udpv6_sendmsg
,
1572 .recvmsg
= udpv6_recvmsg
,
1573 .backlog_rcv
= __udpv6_queue_rcv_skb
,
1574 .hash
= udp_lib_hash
,
1575 .unhash
= udp_lib_unhash
,
1576 .rehash
= udp_v6_rehash
,
1577 .get_port
= udp_v6_get_port
,
1578 .memory_allocated
= &udp_memory_allocated
,
1579 .sysctl_mem
= sysctl_udp_mem
,
1580 .sysctl_wmem
= &sysctl_udp_wmem_min
,
1581 .sysctl_rmem
= &sysctl_udp_rmem_min
,
1582 .obj_size
= sizeof(struct udp6_sock
),
1583 .slab_flags
= SLAB_DESTROY_BY_RCU
,
1584 .h
.udp_table
= &udp_table
,
1585 #ifdef CONFIG_COMPAT
1586 .compat_setsockopt
= compat_udpv6_setsockopt
,
1587 .compat_getsockopt
= compat_udpv6_getsockopt
,
1589 .clear_sk
= udp_v6_clear_sk
,
1592 static struct inet_protosw udpv6_protosw
= {
1594 .protocol
= IPPROTO_UDP
,
1595 .prot
= &udpv6_prot
,
1596 .ops
= &inet6_dgram_ops
,
1597 .flags
= INET_PROTOSW_PERMANENT
,
1600 int __init
udpv6_init(void)
1604 ret
= inet6_add_protocol(&udpv6_protocol
, IPPROTO_UDP
);
1608 ret
= inet6_register_protosw(&udpv6_protosw
);
1610 goto out_udpv6_protocol
;
1615 inet6_del_protocol(&udpv6_protocol
, IPPROTO_UDP
);
1619 void udpv6_exit(void)
1621 inet6_unregister_protosw(&udpv6_protosw
);
1622 inet6_del_protocol(&udpv6_protocol
, IPPROTO_UDP
);