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 <linux/uaccess.h>
39 #include <linux/indirect_call_wrapper.h>
41 #include <net/addrconf.h>
42 #include <net/ndisc.h>
43 #include <net/protocol.h>
44 #include <net/transp_v6.h>
45 #include <net/ip6_route.h>
47 #include <net/tcp_states.h>
48 #include <net/ip6_checksum.h>
49 #include <net/ip6_tunnel.h>
51 #include <net/inet_hashtables.h>
52 #include <net/inet6_hashtables.h>
53 #include <net/busy_poll.h>
54 #include <net/sock_reuseport.h>
56 #include <linux/proc_fs.h>
57 #include <linux/seq_file.h>
58 #include <trace/events/skb.h>
61 static bool udp6_lib_exact_dif_match(struct net *net, struct sk_buff *skb)
63 #if defined(CONFIG_NET_L3_MASTER_DEV)
64 if (!net->ipv4.sysctl_udp_l3mdev_accept &&
65 skb && ipv6_l3mdev_skb(IP6CB(skb)->flags))
71 static u32 udp6_ehashfn(const struct net *net,
72 const struct in6_addr *laddr,
74 const struct in6_addr *faddr,
77 static u32 udp6_ehash_secret __read_mostly;
78 static u32 udp_ipv6_hash_secret __read_mostly;
82 net_get_random_once(&udp6_ehash_secret,
83 sizeof(udp6_ehash_secret));
84 net_get_random_once(&udp_ipv6_hash_secret,
85 sizeof(udp_ipv6_hash_secret));
87 lhash = (__force u32)laddr->s6_addr32[3];
88 fhash = __ipv6_addr_jhash(faddr, udp_ipv6_hash_secret);
90 return __inet6_ehashfn(lhash, lport, fhash, fport,
91 udp_ipv6_hash_secret + net_hash_mix(net));
94 int udp_v6_get_port(struct sock *sk, unsigned short snum)
96 unsigned int hash2_nulladdr =
97 ipv6_portaddr_hash(sock_net(sk), &in6addr_any, snum);
98 unsigned int hash2_partial =
99 ipv6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0);
101 /* precompute partial secondary hash */
102 udp_sk(sk)->udp_portaddr_hash = hash2_partial;
103 return udp_lib_get_port(sk, snum, hash2_nulladdr);
106 void udp_v6_rehash(struct sock *sk)
108 u16 new_hash = ipv6_portaddr_hash(sock_net(sk),
109 &sk->sk_v6_rcv_saddr,
110 inet_sk(sk)->inet_num);
112 udp_lib_rehash(sk, new_hash);
115 static int compute_score(struct sock *sk, struct net *net,
116 const struct in6_addr *saddr, __be16 sport,
117 const struct in6_addr *daddr, unsigned short hnum,
118 int dif, int sdif, bool exact_dif)
121 struct inet_sock *inet;
124 if (!net_eq(sock_net(sk), net) ||
125 udp_sk(sk)->udp_port_hash != hnum ||
126 sk->sk_family != PF_INET6)
129 if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr))
135 if (inet->inet_dport) {
136 if (inet->inet_dport != sport)
141 if (!ipv6_addr_any(&sk->sk_v6_daddr)) {
142 if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr))
147 dev_match = udp_sk_bound_dev_eq(net, sk->sk_bound_dev_if, dif, sdif);
152 if (sk->sk_incoming_cpu == raw_smp_processor_id())
158 /* called with rcu_read_lock() */
159 static struct sock *udp6_lib_lookup2(struct net *net,
160 const struct in6_addr *saddr, __be16 sport,
161 const struct in6_addr *daddr, unsigned int hnum,
162 int dif, int sdif, bool exact_dif,
163 struct udp_hslot *hslot2, struct sk_buff *skb)
165 struct sock *sk, *result;
171 udp_portaddr_for_each_entry_rcu(sk, &hslot2->head) {
172 score = compute_score(sk, net, saddr, sport,
173 daddr, hnum, dif, sdif, exact_dif);
174 if (score > badness) {
175 if (sk->sk_reuseport) {
176 hash = udp6_ehashfn(net, daddr, hnum,
179 result = reuseport_select_sock(sk, hash, skb,
180 sizeof(struct udphdr));
191 /* rcu_read_lock() must be held */
192 struct sock *__udp6_lib_lookup(struct net *net,
193 const struct in6_addr *saddr, __be16 sport,
194 const struct in6_addr *daddr, __be16 dport,
195 int dif, int sdif, struct udp_table *udptable,
198 unsigned short hnum = ntohs(dport);
199 unsigned int hash2, slot2;
200 struct udp_hslot *hslot2;
202 bool exact_dif = udp6_lib_exact_dif_match(net, skb);
204 hash2 = ipv6_portaddr_hash(net, daddr, hnum);
205 slot2 = hash2 & udptable->mask;
206 hslot2 = &udptable->hash2[slot2];
208 result = udp6_lib_lookup2(net, saddr, sport,
209 daddr, hnum, dif, sdif, exact_dif,
212 hash2 = ipv6_portaddr_hash(net, &in6addr_any, hnum);
213 slot2 = hash2 & udptable->mask;
215 hslot2 = &udptable->hash2[slot2];
217 result = udp6_lib_lookup2(net, saddr, sport,
218 &in6addr_any, hnum, dif, sdif,
222 if (unlikely(IS_ERR(result)))
226 EXPORT_SYMBOL_GPL(__udp6_lib_lookup);
228 static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
229 __be16 sport, __be16 dport,
230 struct udp_table *udptable)
232 const struct ipv6hdr *iph = ipv6_hdr(skb);
234 return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport,
235 &iph->daddr, dport, inet6_iif(skb),
236 inet6_sdif(skb), udptable, skb);
239 struct sock *udp6_lib_lookup_skb(struct sk_buff *skb,
240 __be16 sport, __be16 dport)
242 const struct ipv6hdr *iph = ipv6_hdr(skb);
244 return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport,
245 &iph->daddr, dport, inet6_iif(skb),
246 inet6_sdif(skb), &udp_table, NULL);
248 EXPORT_SYMBOL_GPL(udp6_lib_lookup_skb);
250 /* Must be called under rcu_read_lock().
251 * Does increment socket refcount.
253 #if IS_ENABLED(CONFIG_NF_TPROXY_IPV6) || IS_ENABLED(CONFIG_NF_SOCKET_IPV6)
254 struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport,
255 const struct in6_addr *daddr, __be16 dport, int dif)
259 sk = __udp6_lib_lookup(net, saddr, sport, daddr, dport,
260 dif, 0, &udp_table, NULL);
261 if (sk && !refcount_inc_not_zero(&sk->sk_refcnt))
265 EXPORT_SYMBOL_GPL(udp6_lib_lookup);
268 /* do not use the scratch area len for jumbogram: their length execeeds the
269 * scratch area space; note that the IP6CB flags is still in the first
270 * cacheline, so checking for jumbograms is cheap
272 static int udp6_skb_len(struct sk_buff *skb)
274 return unlikely(inet6_is_jumbogram(skb)) ? skb->len : udp_skb_len(skb);
278 * This should be easy, if there is something there we
279 * return it, otherwise we block.
282 int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
283 int noblock, int flags, int *addr_len)
285 struct ipv6_pinfo *np = inet6_sk(sk);
286 struct inet_sock *inet = inet_sk(sk);
288 unsigned int ulen, copied;
289 int off, err, peeking = flags & MSG_PEEK;
290 int is_udplite = IS_UDPLITE(sk);
291 struct udp_mib __percpu *mib;
292 bool checksum_valid = false;
295 if (flags & MSG_ERRQUEUE)
296 return ipv6_recv_error(sk, msg, len, addr_len);
298 if (np->rxpmtu && np->rxopt.bits.rxpmtu)
299 return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
302 off = sk_peek_offset(sk, flags);
303 skb = __skb_recv_udp(sk, flags, noblock, &off, &err);
307 ulen = udp6_skb_len(skb);
309 if (copied > ulen - off)
311 else if (copied < ulen)
312 msg->msg_flags |= MSG_TRUNC;
314 is_udp4 = (skb->protocol == htons(ETH_P_IP));
315 mib = __UDPX_MIB(sk, is_udp4);
318 * If checksum is needed at all, try to do it while copying the
319 * data. If the data is truncated, or if we only want a partial
320 * coverage checksum (UDP-Lite), do it before the copy.
323 if (copied < ulen || peeking ||
324 (is_udplite && UDP_SKB_CB(skb)->partial_cov)) {
325 checksum_valid = udp_skb_csum_unnecessary(skb) ||
326 !__udp_lib_checksum_complete(skb);
331 if (checksum_valid || udp_skb_csum_unnecessary(skb)) {
332 if (udp_skb_is_linear(skb))
333 err = copy_linear_skb(skb, copied, off, &msg->msg_iter);
335 err = skb_copy_datagram_msg(skb, off, msg, copied);
337 err = skb_copy_and_csum_datagram_msg(skb, off, msg);
343 atomic_inc(&sk->sk_drops);
344 SNMP_INC_STATS(mib, UDP_MIB_INERRORS);
350 SNMP_INC_STATS(mib, UDP_MIB_INDATAGRAMS);
352 sock_recv_ts_and_drops(msg, sk, skb);
354 /* Copy the address. */
356 DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
357 sin6->sin6_family = AF_INET6;
358 sin6->sin6_port = udp_hdr(skb)->source;
359 sin6->sin6_flowinfo = 0;
362 ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr,
364 sin6->sin6_scope_id = 0;
366 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
367 sin6->sin6_scope_id =
368 ipv6_iface_scope_id(&sin6->sin6_addr,
371 *addr_len = sizeof(*sin6);
373 if (cgroup_bpf_enabled)
374 BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk,
375 (struct sockaddr *)sin6);
378 if (udp_sk(sk)->gro_enabled)
379 udp_cmsg_recv(msg, sk, skb);
382 ip6_datagram_recv_common_ctl(sk, msg, skb);
385 if (inet->cmsg_flags)
386 ip_cmsg_recv_offset(msg, sk, skb,
387 sizeof(struct udphdr), off);
390 ip6_datagram_recv_specific_ctl(sk, msg, skb);
394 if (flags & MSG_TRUNC)
397 skb_consume_udp(sk, skb, peeking ? -err : err);
401 if (!__sk_queue_drop_skb(sk, &udp_sk(sk)->reader_queue, skb, flags,
402 udp_skb_destructor)) {
403 SNMP_INC_STATS(mib, UDP_MIB_CSUMERRORS);
404 SNMP_INC_STATS(mib, UDP_MIB_INERRORS);
408 /* starting over for a new packet, but check if we need to yield */
410 msg->msg_flags &= ~MSG_TRUNC;
414 DEFINE_STATIC_KEY_FALSE(udpv6_encap_needed_key);
415 void udpv6_encap_enable(void)
417 static_branch_inc(&udpv6_encap_needed_key);
419 EXPORT_SYMBOL(udpv6_encap_enable);
421 /* Handler for tunnels with arbitrary destination ports: no socket lookup, go
422 * through error handlers in encapsulations looking for a match.
424 static int __udp6_lib_err_encap_no_sk(struct sk_buff *skb,
425 struct inet6_skb_parm *opt,
426 u8 type, u8 code, int offset, __be32 info)
430 for (i = 0; i < MAX_IPTUN_ENCAP_OPS; i++) {
431 int (*handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
432 u8 type, u8 code, int offset, __be32 info);
433 const struct ip6_tnl_encap_ops *encap;
435 encap = rcu_dereference(ip6tun_encaps[i]);
438 handler = encap->err_handler;
439 if (handler && !handler(skb, opt, type, code, offset, info))
446 /* Try to match ICMP errors to UDP tunnels by looking up a socket without
447 * reversing source and destination port: this will match tunnels that force the
448 * same destination port on both endpoints (e.g. VXLAN, GENEVE). Note that
449 * lwtunnels might actually break this assumption by being configured with
450 * different destination ports on endpoints, in this case we won't be able to
451 * trace ICMP messages back to them.
453 * If this doesn't match any socket, probe tunnels with arbitrary destination
454 * ports (e.g. FoU, GUE): there, the receiving socket is useless, as the port
455 * we've sent packets to won't necessarily match the local destination port.
457 * Then ask the tunnel implementation to match the error against a valid
460 * Return an error if we can't find a match, the socket if we need further
461 * processing, zero otherwise.
463 static struct sock *__udp6_lib_err_encap(struct net *net,
464 const struct ipv6hdr *hdr, int offset,
466 struct udp_table *udptable,
468 struct inet6_skb_parm *opt,
469 u8 type, u8 code, __be32 info)
471 int network_offset, transport_offset;
474 network_offset = skb_network_offset(skb);
475 transport_offset = skb_transport_offset(skb);
477 /* Network header needs to point to the outer IPv6 header inside ICMP */
478 skb_reset_network_header(skb);
480 /* Transport header needs to point to the UDP header */
481 skb_set_transport_header(skb, offset);
483 sk = __udp6_lib_lookup(net, &hdr->daddr, uh->source,
484 &hdr->saddr, uh->dest,
485 inet6_iif(skb), 0, udptable, skb);
487 int (*lookup)(struct sock *sk, struct sk_buff *skb);
488 struct udp_sock *up = udp_sk(sk);
490 lookup = READ_ONCE(up->encap_err_lookup);
491 if (!lookup || lookup(sk, skb))
496 sk = ERR_PTR(__udp6_lib_err_encap_no_sk(skb, opt, type, code,
500 skb_set_transport_header(skb, transport_offset);
501 skb_set_network_header(skb, network_offset);
506 int __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
507 u8 type, u8 code, int offset, __be32 info,
508 struct udp_table *udptable)
510 struct ipv6_pinfo *np;
511 const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data;
512 const struct in6_addr *saddr = &hdr->saddr;
513 const struct in6_addr *daddr = &hdr->daddr;
514 struct udphdr *uh = (struct udphdr *)(skb->data+offset);
519 struct net *net = dev_net(skb->dev);
521 sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source,
522 inet6_iif(skb), inet6_sdif(skb), udptable, NULL);
524 /* No socket for error: try tunnels before discarding */
525 sk = ERR_PTR(-ENOENT);
526 if (static_branch_unlikely(&udpv6_encap_needed_key)) {
527 sk = __udp6_lib_err_encap(net, hdr, offset, uh,
529 opt, type, code, info);
535 __ICMP6_INC_STATS(net, __in6_dev_get(skb->dev),
543 harderr = icmpv6_err_convert(type, code, &err);
546 if (type == ICMPV6_PKT_TOOBIG) {
547 if (!ip6_sk_accept_pmtu(sk))
549 ip6_sk_update_pmtu(skb, sk, info);
550 if (np->pmtudisc != IPV6_PMTUDISC_DONT)
553 if (type == NDISC_REDIRECT) {
555 ip6_redirect(skb, sock_net(sk), inet6_iif(skb),
556 sk->sk_mark, sk->sk_uid);
558 ip6_sk_redirect(skb, sk);
563 /* Tunnels don't have an application socket: don't pass errors back */
568 if (!harderr || sk->sk_state != TCP_ESTABLISHED)
571 ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
575 sk->sk_error_report(sk);
580 static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
584 if (!ipv6_addr_any(&sk->sk_v6_daddr)) {
585 sock_rps_save_rxhash(sk, skb);
586 sk_mark_napi_id(sk, skb);
587 sk_incoming_cpu_update(sk);
589 sk_mark_napi_id_once(sk, skb);
592 rc = __udp_enqueue_schedule_skb(sk, skb);
594 int is_udplite = IS_UDPLITE(sk);
596 /* Note that an ENOMEM error is charged twice */
598 UDP6_INC_STATS(sock_net(sk),
599 UDP_MIB_RCVBUFERRORS, is_udplite);
600 UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
608 static __inline__ int udpv6_err(struct sk_buff *skb,
609 struct inet6_skb_parm *opt, u8 type,
610 u8 code, int offset, __be32 info)
612 return __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table);
615 static int udpv6_queue_rcv_one_skb(struct sock *sk, struct sk_buff *skb)
617 struct udp_sock *up = udp_sk(sk);
618 int is_udplite = IS_UDPLITE(sk);
620 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
623 if (static_branch_unlikely(&udpv6_encap_needed_key) && up->encap_type) {
624 int (*encap_rcv)(struct sock *sk, struct sk_buff *skb);
627 * This is an encapsulation socket so pass the skb to
628 * the socket's udp_encap_rcv() hook. Otherwise, just
629 * fall through and pass this up the UDP socket.
630 * up->encap_rcv() returns the following value:
631 * =0 if skb was successfully passed to the encap
632 * handler or was discarded by it.
633 * >0 if skb should be passed on to UDP.
634 * <0 if skb should be resubmitted as proto -N
637 /* if we're overly short, let UDP handle it */
638 encap_rcv = READ_ONCE(up->encap_rcv);
642 /* Verify checksum before giving to encap */
643 if (udp_lib_checksum_complete(skb))
646 ret = encap_rcv(sk, skb);
648 __UDP_INC_STATS(sock_net(sk),
655 /* FALLTHROUGH -- it's a UDP Packet */
659 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
661 if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) {
663 if (up->pcrlen == 0) { /* full coverage was set */
664 net_dbg_ratelimited("UDPLITE6: partial coverage %d while full coverage %d requested\n",
665 UDP_SKB_CB(skb)->cscov, skb->len);
668 if (UDP_SKB_CB(skb)->cscov < up->pcrlen) {
669 net_dbg_ratelimited("UDPLITE6: coverage %d too small, need min %d\n",
670 UDP_SKB_CB(skb)->cscov, up->pcrlen);
675 prefetch(&sk->sk_rmem_alloc);
676 if (rcu_access_pointer(sk->sk_filter) &&
677 udp_lib_checksum_complete(skb))
680 if (sk_filter_trim_cap(sk, skb, sizeof(struct udphdr)))
683 udp_csum_pull_header(skb);
687 return __udpv6_queue_rcv_skb(sk, skb);
690 __UDP6_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite);
692 __UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
693 atomic_inc(&sk->sk_drops);
698 static int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
700 struct sk_buff *next, *segs;
703 if (likely(!udp_unexpected_gso(sk, skb)))
704 return udpv6_queue_rcv_one_skb(sk, skb);
706 __skb_push(skb, -skb_mac_offset(skb));
707 segs = udp_rcv_segment(sk, skb, false);
708 for (skb = segs; skb; skb = next) {
710 __skb_pull(skb, skb_transport_offset(skb));
712 ret = udpv6_queue_rcv_one_skb(sk, skb);
714 ip6_protocol_deliver_rcu(dev_net(skb->dev), skb, ret,
720 static bool __udp_v6_is_mcast_sock(struct net *net, struct sock *sk,
721 __be16 loc_port, const struct in6_addr *loc_addr,
722 __be16 rmt_port, const struct in6_addr *rmt_addr,
723 int dif, int sdif, unsigned short hnum)
725 struct inet_sock *inet = inet_sk(sk);
727 if (!net_eq(sock_net(sk), net))
730 if (udp_sk(sk)->udp_port_hash != hnum ||
731 sk->sk_family != PF_INET6 ||
732 (inet->inet_dport && inet->inet_dport != rmt_port) ||
733 (!ipv6_addr_any(&sk->sk_v6_daddr) &&
734 !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) ||
735 !udp_sk_bound_dev_eq(net, sk->sk_bound_dev_if, dif, sdif) ||
736 (!ipv6_addr_any(&sk->sk_v6_rcv_saddr) &&
737 !ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr)))
739 if (!inet6_mc_check(sk, loc_addr, rmt_addr))
744 static void udp6_csum_zero_error(struct sk_buff *skb)
746 /* RFC 2460 section 8.1 says that we SHOULD log
747 * this error. Well, it is reasonable.
749 net_dbg_ratelimited("IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n",
750 &ipv6_hdr(skb)->saddr, ntohs(udp_hdr(skb)->source),
751 &ipv6_hdr(skb)->daddr, ntohs(udp_hdr(skb)->dest));
755 * Note: called only from the BH handler context,
756 * so we don't need to lock the hashes.
758 static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
759 const struct in6_addr *saddr, const struct in6_addr *daddr,
760 struct udp_table *udptable, int proto)
762 struct sock *sk, *first = NULL;
763 const struct udphdr *uh = udp_hdr(skb);
764 unsigned short hnum = ntohs(uh->dest);
765 struct udp_hslot *hslot = udp_hashslot(udptable, net, hnum);
766 unsigned int offset = offsetof(typeof(*sk), sk_node);
767 unsigned int hash2 = 0, hash2_any = 0, use_hash2 = (hslot->count > 10);
768 int dif = inet6_iif(skb);
769 int sdif = inet6_sdif(skb);
770 struct hlist_node *node;
771 struct sk_buff *nskb;
774 hash2_any = ipv6_portaddr_hash(net, &in6addr_any, hnum) &
776 hash2 = ipv6_portaddr_hash(net, daddr, hnum) & udptable->mask;
778 hslot = &udptable->hash2[hash2];
779 offset = offsetof(typeof(*sk), __sk_common.skc_portaddr_node);
782 sk_for_each_entry_offset_rcu(sk, node, &hslot->head, offset) {
783 if (!__udp_v6_is_mcast_sock(net, sk, uh->dest, daddr,
784 uh->source, saddr, dif, sdif,
787 /* If zero checksum and no_check is not on for
788 * the socket then skip it.
790 if (!uh->check && !udp_sk(sk)->no_check6_rx)
796 nskb = skb_clone(skb, GFP_ATOMIC);
797 if (unlikely(!nskb)) {
798 atomic_inc(&sk->sk_drops);
799 __UDP6_INC_STATS(net, UDP_MIB_RCVBUFERRORS,
801 __UDP6_INC_STATS(net, UDP_MIB_INERRORS,
806 if (udpv6_queue_rcv_skb(sk, nskb) > 0)
810 /* Also lookup *:port if we are using hash2 and haven't done so yet. */
811 if (use_hash2 && hash2 != hash2_any) {
817 if (udpv6_queue_rcv_skb(first, skb) > 0)
821 __UDP6_INC_STATS(net, UDP_MIB_IGNOREDMULTI,
822 proto == IPPROTO_UDPLITE);
827 static void udp6_sk_rx_dst_set(struct sock *sk, struct dst_entry *dst)
829 if (udp_sk_rx_dst_set(sk, dst)) {
830 const struct rt6_info *rt = (const struct rt6_info *)dst;
832 inet6_sk(sk)->rx_dst_cookie = rt6_get_cookie(rt);
836 /* wrapper for udp_queue_rcv_skb tacking care of csum conversion and
837 * return code conversion for ip layer consumption
839 static int udp6_unicast_rcv_skb(struct sock *sk, struct sk_buff *skb,
844 if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk))
845 skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check,
848 ret = udpv6_queue_rcv_skb(sk, skb);
850 /* a return value > 0 means to resubmit the input */
856 int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
859 const struct in6_addr *saddr, *daddr;
860 struct net *net = dev_net(skb->dev);
865 if (!pskb_may_pull(skb, sizeof(struct udphdr)))
868 saddr = &ipv6_hdr(skb)->saddr;
869 daddr = &ipv6_hdr(skb)->daddr;
872 ulen = ntohs(uh->len);
876 if (proto == IPPROTO_UDP) {
877 /* UDP validates ulen. */
879 /* Check for jumbo payload */
883 if (ulen < sizeof(*uh))
886 if (ulen < skb->len) {
887 if (pskb_trim_rcsum(skb, ulen))
889 saddr = &ipv6_hdr(skb)->saddr;
890 daddr = &ipv6_hdr(skb)->daddr;
895 if (udp6_csum_init(skb, uh, proto))
898 /* Check if the socket is already available, e.g. due to early demux */
899 sk = skb_steal_sock(skb);
901 struct dst_entry *dst = skb_dst(skb);
904 if (unlikely(sk->sk_rx_dst != dst))
905 udp6_sk_rx_dst_set(sk, dst);
907 if (!uh->check && !udp_sk(sk)->no_check6_rx) {
909 goto report_csum_error;
912 ret = udp6_unicast_rcv_skb(sk, skb, uh);
918 * Multicast receive code
920 if (ipv6_addr_is_multicast(daddr))
921 return __udp6_lib_mcast_deliver(net, skb,
922 saddr, daddr, udptable, proto);
925 sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable);
927 if (!uh->check && !udp_sk(sk)->no_check6_rx)
928 goto report_csum_error;
929 return udp6_unicast_rcv_skb(sk, skb, uh);
933 goto report_csum_error;
935 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
938 if (udp_lib_checksum_complete(skb))
941 __UDP6_INC_STATS(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE);
942 icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0);
948 net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n",
949 proto == IPPROTO_UDPLITE ? "-Lite" : "",
950 saddr, ntohs(uh->source),
952 daddr, ntohs(uh->dest));
956 udp6_csum_zero_error(skb);
958 __UDP6_INC_STATS(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE);
960 __UDP6_INC_STATS(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
966 static struct sock *__udp6_lib_demux_lookup(struct net *net,
967 __be16 loc_port, const struct in6_addr *loc_addr,
968 __be16 rmt_port, const struct in6_addr *rmt_addr,
971 unsigned short hnum = ntohs(loc_port);
972 unsigned int hash2 = ipv6_portaddr_hash(net, loc_addr, hnum);
973 unsigned int slot2 = hash2 & udp_table.mask;
974 struct udp_hslot *hslot2 = &udp_table.hash2[slot2];
975 const __portpair ports = INET_COMBINED_PORTS(rmt_port, hnum);
978 udp_portaddr_for_each_entry_rcu(sk, &hslot2->head) {
979 if (sk->sk_state == TCP_ESTABLISHED &&
980 INET6_MATCH(sk, net, rmt_addr, loc_addr, ports, dif, sdif))
982 /* Only check first socket in chain */
988 INDIRECT_CALLABLE_SCOPE void udp_v6_early_demux(struct sk_buff *skb)
990 struct net *net = dev_net(skb->dev);
991 const struct udphdr *uh;
993 struct dst_entry *dst;
994 int dif = skb->dev->ifindex;
995 int sdif = inet6_sdif(skb);
997 if (!pskb_may_pull(skb, skb_transport_offset(skb) +
998 sizeof(struct udphdr)))
1003 if (skb->pkt_type == PACKET_HOST)
1004 sk = __udp6_lib_demux_lookup(net, uh->dest,
1005 &ipv6_hdr(skb)->daddr,
1006 uh->source, &ipv6_hdr(skb)->saddr,
1011 if (!sk || !refcount_inc_not_zero(&sk->sk_refcnt))
1015 skb->destructor = sock_efree;
1016 dst = READ_ONCE(sk->sk_rx_dst);
1019 dst = dst_check(dst, inet6_sk(sk)->rx_dst_cookie);
1021 /* set noref for now.
1022 * any place which wants to hold dst has to call
1025 skb_dst_set_noref(skb, dst);
1029 INDIRECT_CALLABLE_SCOPE int udpv6_rcv(struct sk_buff *skb)
1031 return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP);
1035 * Throw away all pending data and cancel the corking. Socket is locked.
1037 static void udp_v6_flush_pending_frames(struct sock *sk)
1039 struct udp_sock *up = udp_sk(sk);
1041 if (up->pending == AF_INET)
1042 udp_flush_pending_frames(sk);
1043 else if (up->pending) {
1046 ip6_flush_pending_frames(sk);
1050 static int udpv6_pre_connect(struct sock *sk, struct sockaddr *uaddr,
1053 if (addr_len < offsetofend(struct sockaddr, sa_family))
1055 /* The following checks are replicated from __ip6_datagram_connect()
1056 * and intended to prevent BPF program called below from accessing
1057 * bytes that are out of the bound specified by user in addr_len.
1059 if (uaddr->sa_family == AF_INET) {
1060 if (__ipv6_only_sock(sk))
1061 return -EAFNOSUPPORT;
1062 return udp_pre_connect(sk, uaddr, addr_len);
1065 if (addr_len < SIN6_LEN_RFC2133)
1068 return BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr);
1072 * udp6_hwcsum_outgoing - handle outgoing HW checksumming
1073 * @sk: socket we are sending on
1074 * @skb: sk_buff containing the filled-in UDP header
1075 * (checksum field must be zeroed out)
1077 static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb,
1078 const struct in6_addr *saddr,
1079 const struct in6_addr *daddr, int len)
1081 unsigned int offset;
1082 struct udphdr *uh = udp_hdr(skb);
1083 struct sk_buff *frags = skb_shinfo(skb)->frag_list;
1087 /* Only one fragment on the socket. */
1088 skb->csum_start = skb_transport_header(skb) - skb->head;
1089 skb->csum_offset = offsetof(struct udphdr, check);
1090 uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0);
1093 * HW-checksum won't work as there are two or more
1094 * fragments on the socket so that all csums of sk_buffs
1095 * should be together
1097 offset = skb_transport_offset(skb);
1098 skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
1101 skb->ip_summed = CHECKSUM_NONE;
1104 csum = csum_add(csum, frags->csum);
1105 } while ((frags = frags->next));
1107 uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP,
1110 uh->check = CSUM_MANGLED_0;
1118 static int udp_v6_send_skb(struct sk_buff *skb, struct flowi6 *fl6,
1119 struct inet_cork *cork)
1121 struct sock *sk = skb->sk;
1124 int is_udplite = IS_UDPLITE(sk);
1126 int offset = skb_transport_offset(skb);
1127 int len = skb->len - offset;
1130 * Create a UDP header
1133 uh->source = fl6->fl6_sport;
1134 uh->dest = fl6->fl6_dport;
1135 uh->len = htons(len);
1138 if (cork->gso_size) {
1139 const int hlen = skb_network_header_len(skb) +
1140 sizeof(struct udphdr);
1142 if (hlen + cork->gso_size > cork->fragsize) {
1146 if (skb->len > cork->gso_size * UDP_MAX_SEGMENTS) {
1150 if (udp_sk(sk)->no_check6_tx) {
1154 if (skb->ip_summed != CHECKSUM_PARTIAL || is_udplite ||
1155 dst_xfrm(skb_dst(skb))) {
1160 skb_shinfo(skb)->gso_size = cork->gso_size;
1161 skb_shinfo(skb)->gso_type = SKB_GSO_UDP_L4;
1166 csum = udplite_csum(skb);
1167 else if (udp_sk(sk)->no_check6_tx) { /* UDP csum disabled */
1168 skb->ip_summed = CHECKSUM_NONE;
1170 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */
1172 udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, len);
1175 csum = udp_csum(skb);
1177 /* add protocol-dependent pseudo-header */
1178 uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
1179 len, fl6->flowi6_proto, csum);
1181 uh->check = CSUM_MANGLED_0;
1184 err = ip6_send_skb(skb);
1186 if (err == -ENOBUFS && !inet6_sk(sk)->recverr) {
1187 UDP6_INC_STATS(sock_net(sk),
1188 UDP_MIB_SNDBUFERRORS, is_udplite);
1192 UDP6_INC_STATS(sock_net(sk),
1193 UDP_MIB_OUTDATAGRAMS, is_udplite);
1198 static int udp_v6_push_pending_frames(struct sock *sk)
1200 struct sk_buff *skb;
1201 struct udp_sock *up = udp_sk(sk);
1205 if (up->pending == AF_INET)
1206 return udp_push_pending_frames(sk);
1208 /* ip6_finish_skb will release the cork, so make a copy of
1211 fl6 = inet_sk(sk)->cork.fl.u.ip6;
1213 skb = ip6_finish_skb(sk);
1217 err = udp_v6_send_skb(skb, &fl6, &inet_sk(sk)->cork.base);
1225 int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
1227 struct ipv6_txoptions opt_space;
1228 struct udp_sock *up = udp_sk(sk);
1229 struct inet_sock *inet = inet_sk(sk);
1230 struct ipv6_pinfo *np = inet6_sk(sk);
1231 DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
1232 struct in6_addr *daddr, *final_p, final;
1233 struct ipv6_txoptions *opt = NULL;
1234 struct ipv6_txoptions *opt_to_free = NULL;
1235 struct ip6_flowlabel *flowlabel = NULL;
1237 struct dst_entry *dst;
1238 struct ipcm6_cookie ipc6;
1239 int addr_len = msg->msg_namelen;
1240 bool connected = false;
1242 int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
1244 int is_udplite = IS_UDPLITE(sk);
1245 int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
1248 ipc6.gso_size = up->gso_size;
1249 ipc6.sockc.tsflags = sk->sk_tsflags;
1251 /* destination address check */
1253 if (addr_len < offsetof(struct sockaddr, sa_data))
1256 switch (sin6->sin6_family) {
1258 if (addr_len < SIN6_LEN_RFC2133)
1260 daddr = &sin6->sin6_addr;
1261 if (ipv6_addr_any(daddr) &&
1262 ipv6_addr_v4mapped(&np->saddr))
1263 ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK),
1267 goto do_udp_sendmsg;
1269 msg->msg_name = sin6 = NULL;
1270 msg->msg_namelen = addr_len = 0;
1276 } else if (!up->pending) {
1277 if (sk->sk_state != TCP_ESTABLISHED)
1278 return -EDESTADDRREQ;
1279 daddr = &sk->sk_v6_daddr;
1284 if (ipv6_addr_v4mapped(daddr)) {
1285 struct sockaddr_in sin;
1286 sin.sin_family = AF_INET;
1287 sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport;
1288 sin.sin_addr.s_addr = daddr->s6_addr32[3];
1289 msg->msg_name = &sin;
1290 msg->msg_namelen = sizeof(sin);
1292 if (__ipv6_only_sock(sk))
1293 return -ENETUNREACH;
1294 return udp_sendmsg(sk, msg, len);
1298 if (up->pending == AF_INET)
1299 return udp_sendmsg(sk, msg, len);
1301 /* Rough check on arithmetic overflow,
1302 better check is made in ip6_append_data().
1304 if (len > INT_MAX - sizeof(struct udphdr))
1307 getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
1310 * There are pending frames.
1311 * The socket lock must be held while it's corked.
1314 if (likely(up->pending)) {
1315 if (unlikely(up->pending != AF_INET6)) {
1317 return -EAFNOSUPPORT;
1320 goto do_append_data;
1324 ulen += sizeof(struct udphdr);
1326 memset(&fl6, 0, sizeof(fl6));
1329 if (sin6->sin6_port == 0)
1332 fl6.fl6_dport = sin6->sin6_port;
1333 daddr = &sin6->sin6_addr;
1336 fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
1337 if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
1338 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
1345 * Otherwise it will be difficult to maintain
1348 if (sk->sk_state == TCP_ESTABLISHED &&
1349 ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
1350 daddr = &sk->sk_v6_daddr;
1352 if (addr_len >= sizeof(struct sockaddr_in6) &&
1353 sin6->sin6_scope_id &&
1354 __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
1355 fl6.flowi6_oif = sin6->sin6_scope_id;
1357 if (sk->sk_state != TCP_ESTABLISHED)
1358 return -EDESTADDRREQ;
1360 fl6.fl6_dport = inet->inet_dport;
1361 daddr = &sk->sk_v6_daddr;
1362 fl6.flowlabel = np->flow_label;
1366 if (!fl6.flowi6_oif)
1367 fl6.flowi6_oif = sk->sk_bound_dev_if;
1369 if (!fl6.flowi6_oif)
1370 fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
1372 fl6.flowi6_mark = sk->sk_mark;
1373 fl6.flowi6_uid = sk->sk_uid;
1375 if (msg->msg_controllen) {
1377 memset(opt, 0, sizeof(struct ipv6_txoptions));
1378 opt->tot_len = sizeof(*opt);
1381 err = udp_cmsg_send(sk, msg, &ipc6.gso_size);
1383 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6,
1386 fl6_sock_release(flowlabel);
1389 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
1390 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
1394 if (!(opt->opt_nflen|opt->opt_flen))
1399 opt = txopt_get(np);
1403 opt = fl6_merge_options(&opt_space, flowlabel, opt);
1404 opt = ipv6_fixup_options(&opt_space, opt);
1407 fl6.flowi6_proto = sk->sk_protocol;
1409 if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
1410 fl6.saddr = np->saddr;
1411 fl6.fl6_sport = inet->inet_sport;
1413 if (cgroup_bpf_enabled && !connected) {
1414 err = BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk,
1415 (struct sockaddr *)sin6, &fl6.saddr);
1419 if (ipv6_addr_v4mapped(&sin6->sin6_addr)) {
1420 /* BPF program rewrote IPv6-only by IPv4-mapped
1421 * IPv6. It's currently unsupported.
1426 if (sin6->sin6_port == 0) {
1427 /* BPF program set invalid port. Reject it. */
1431 fl6.fl6_dport = sin6->sin6_port;
1432 fl6.daddr = sin6->sin6_addr;
1436 if (ipv6_addr_any(&fl6.daddr))
1437 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
1439 final_p = fl6_update_dst(&fl6, opt, &final);
1443 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) {
1444 fl6.flowi6_oif = np->mcast_oif;
1446 } else if (!fl6.flowi6_oif)
1447 fl6.flowi6_oif = np->ucast_oif;
1449 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
1451 if (ipc6.tclass < 0)
1452 ipc6.tclass = np->tclass;
1454 fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
1456 dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, connected);
1463 if (ipc6.hlimit < 0)
1464 ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
1466 if (msg->msg_flags&MSG_CONFIRM)
1470 /* Lockless fast path for the non-corking case */
1472 struct inet_cork_full cork;
1473 struct sk_buff *skb;
1475 skb = ip6_make_skb(sk, getfrag, msg, ulen,
1476 sizeof(struct udphdr), &ipc6,
1477 &fl6, (struct rt6_info *)dst,
1478 msg->msg_flags, &cork);
1480 if (!IS_ERR_OR_NULL(skb))
1481 err = udp_v6_send_skb(skb, &fl6, &cork.base);
1486 if (unlikely(up->pending)) {
1487 /* The socket is already corked while preparing it. */
1488 /* ... which is an evident application bug. --ANK */
1491 net_dbg_ratelimited("udp cork app bug 2\n");
1496 up->pending = AF_INET6;
1499 if (ipc6.dontfrag < 0)
1500 ipc6.dontfrag = np->dontfrag;
1502 err = ip6_append_data(sk, getfrag, msg, ulen, sizeof(struct udphdr),
1503 &ipc6, &fl6, (struct rt6_info *)dst,
1504 corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
1506 udp_v6_flush_pending_frames(sk);
1508 err = udp_v6_push_pending_frames(sk);
1509 else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
1513 err = np->recverr ? net_xmit_errno(err) : 0;
1519 fl6_sock_release(flowlabel);
1520 txopt_put(opt_to_free);
1524 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
1525 * ENOBUFS might not be good (it's not tunable per se), but otherwise
1526 * we don't have a good statistic (IpOutDiscards but it can be too many
1527 * things). We could add another new stat but at least for now that
1528 * seems like overkill.
1530 if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
1531 UDP6_INC_STATS(sock_net(sk),
1532 UDP_MIB_SNDBUFERRORS, is_udplite);
1537 if (msg->msg_flags & MSG_PROBE)
1538 dst_confirm_neigh(dst, &fl6.daddr);
1539 if (!(msg->msg_flags&MSG_PROBE) || len)
1540 goto back_from_confirm;
1545 void udpv6_destroy_sock(struct sock *sk)
1547 struct udp_sock *up = udp_sk(sk);
1549 udp_v6_flush_pending_frames(sk);
1552 if (static_branch_unlikely(&udpv6_encap_needed_key)) {
1553 if (up->encap_type) {
1554 void (*encap_destroy)(struct sock *sk);
1555 encap_destroy = READ_ONCE(up->encap_destroy);
1559 if (up->encap_enabled)
1560 static_branch_dec(&udpv6_encap_needed_key);
1563 inet6_destroy_sock(sk);
1567 * Socket option code for UDP
1569 int udpv6_setsockopt(struct sock *sk, int level, int optname,
1570 char __user *optval, unsigned int optlen)
1572 if (level == SOL_UDP || level == SOL_UDPLITE)
1573 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
1574 udp_v6_push_pending_frames);
1575 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1578 #ifdef CONFIG_COMPAT
1579 int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
1580 char __user *optval, unsigned int optlen)
1582 if (level == SOL_UDP || level == SOL_UDPLITE)
1583 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
1584 udp_v6_push_pending_frames);
1585 return compat_ipv6_setsockopt(sk, level, optname, optval, optlen);
1589 int udpv6_getsockopt(struct sock *sk, int level, int optname,
1590 char __user *optval, int __user *optlen)
1592 if (level == SOL_UDP || level == SOL_UDPLITE)
1593 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
1594 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1597 #ifdef CONFIG_COMPAT
1598 int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
1599 char __user *optval, int __user *optlen)
1601 if (level == SOL_UDP || level == SOL_UDPLITE)
1602 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
1603 return compat_ipv6_getsockopt(sk, level, optname, optval, optlen);
1607 /* thinking of making this const? Don't.
1608 * early_demux can change based on sysctl.
1610 static struct inet6_protocol udpv6_protocol = {
1611 .early_demux = udp_v6_early_demux,
1612 .early_demux_handler = udp_v6_early_demux,
1613 .handler = udpv6_rcv,
1614 .err_handler = udpv6_err,
1615 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
1618 /* ------------------------------------------------------------------------ */
1619 #ifdef CONFIG_PROC_FS
1620 int udp6_seq_show(struct seq_file *seq, void *v)
1622 if (v == SEQ_START_TOKEN) {
1623 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1625 int bucket = ((struct udp_iter_state *)seq->private)->bucket;
1626 struct inet_sock *inet = inet_sk(v);
1627 __u16 srcp = ntohs(inet->inet_sport);
1628 __u16 destp = ntohs(inet->inet_dport);
1629 __ip6_dgram_sock_seq_show(seq, v, srcp, destp,
1630 udp_rqueue_get(v), bucket);
1635 const struct seq_operations udp6_seq_ops = {
1636 .start = udp_seq_start,
1637 .next = udp_seq_next,
1638 .stop = udp_seq_stop,
1639 .show = udp6_seq_show,
1641 EXPORT_SYMBOL(udp6_seq_ops);
1643 static struct udp_seq_afinfo udp6_seq_afinfo = {
1645 .udp_table = &udp_table,
1648 int __net_init udp6_proc_init(struct net *net)
1650 if (!proc_create_net_data("udp6", 0444, net->proc_net, &udp6_seq_ops,
1651 sizeof(struct udp_iter_state), &udp6_seq_afinfo))
1656 void udp6_proc_exit(struct net *net)
1658 remove_proc_entry("udp6", net->proc_net);
1660 #endif /* CONFIG_PROC_FS */
1662 /* ------------------------------------------------------------------------ */
1664 struct proto udpv6_prot = {
1666 .owner = THIS_MODULE,
1667 .close = udp_lib_close,
1668 .pre_connect = udpv6_pre_connect,
1669 .connect = ip6_datagram_connect,
1670 .disconnect = udp_disconnect,
1672 .init = udp_init_sock,
1673 .destroy = udpv6_destroy_sock,
1674 .setsockopt = udpv6_setsockopt,
1675 .getsockopt = udpv6_getsockopt,
1676 .sendmsg = udpv6_sendmsg,
1677 .recvmsg = udpv6_recvmsg,
1678 .release_cb = ip6_datagram_release_cb,
1679 .hash = udp_lib_hash,
1680 .unhash = udp_lib_unhash,
1681 .rehash = udp_v6_rehash,
1682 .get_port = udp_v6_get_port,
1683 .memory_allocated = &udp_memory_allocated,
1684 .sysctl_mem = sysctl_udp_mem,
1685 .sysctl_wmem_offset = offsetof(struct net, ipv4.sysctl_udp_wmem_min),
1686 .sysctl_rmem_offset = offsetof(struct net, ipv4.sysctl_udp_rmem_min),
1687 .obj_size = sizeof(struct udp6_sock),
1688 .h.udp_table = &udp_table,
1689 #ifdef CONFIG_COMPAT
1690 .compat_setsockopt = compat_udpv6_setsockopt,
1691 .compat_getsockopt = compat_udpv6_getsockopt,
1693 .diag_destroy = udp_abort,
1696 static struct inet_protosw udpv6_protosw = {
1698 .protocol = IPPROTO_UDP,
1699 .prot = &udpv6_prot,
1700 .ops = &inet6_dgram_ops,
1701 .flags = INET_PROTOSW_PERMANENT,
1704 int __init udpv6_init(void)
1708 ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP);
1712 ret = inet6_register_protosw(&udpv6_protosw);
1714 goto out_udpv6_protocol;
1719 inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
1723 void udpv6_exit(void)
1725 inet6_unregister_protosw(&udpv6_protosw);
1726 inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);