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 <asm/uaccess.h>
39 #include <net/ndisc.h>
40 #include <net/protocol.h>
41 #include <net/transp_v6.h>
42 #include <net/ip6_route.h>
44 #include <net/tcp_states.h>
45 #include <net/ip6_checksum.h>
48 #include <linux/proc_fs.h>
49 #include <linux/seq_file.h>
52 int udp_v6_get_port(struct sock *sk, unsigned short snum)
54 return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal);
57 static inline int compute_score(struct sock *sk, struct net *net,
59 struct in6_addr *saddr, __be16 sport,
60 struct in6_addr *daddr, __be16 dport,
65 if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum &&
66 sk->sk_family == PF_INET6) {
67 struct ipv6_pinfo *np = inet6_sk(sk);
68 struct inet_sock *inet = inet_sk(sk);
72 if (inet->dport != sport)
76 if (!ipv6_addr_any(&np->rcv_saddr)) {
77 if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
81 if (!ipv6_addr_any(&np->daddr)) {
82 if (!ipv6_addr_equal(&np->daddr, saddr))
86 if (sk->sk_bound_dev_if) {
87 if (sk->sk_bound_dev_if != dif)
95 static struct sock *__udp6_lib_lookup(struct net *net,
96 struct in6_addr *saddr, __be16 sport,
97 struct in6_addr *daddr, __be16 dport,
98 int dif, struct udp_table *udptable)
100 struct sock *sk, *result = NULL;
101 struct hlist_node *node;
102 unsigned short hnum = ntohs(dport);
103 unsigned int hash = udp_hashfn(net, hnum);
104 struct udp_hslot *hslot = &udptable->hash[hash];
105 int score, badness = -1;
107 spin_lock(&hslot->lock);
108 sk_for_each(sk, node, &hslot->head) {
109 score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif);
110 if (score > badness) {
117 spin_unlock(&hslot->lock);
121 static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
122 __be16 sport, __be16 dport,
123 struct udp_table *udptable)
126 struct ipv6hdr *iph = ipv6_hdr(skb);
128 if (unlikely(sk = skb_steal_sock(skb)))
131 return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport,
132 &iph->daddr, dport, inet6_iif(skb),
137 * This should be easy, if there is something there we
138 * return it, otherwise we block.
141 int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
142 struct msghdr *msg, size_t len,
143 int noblock, int flags, int *addr_len)
145 struct ipv6_pinfo *np = inet6_sk(sk);
146 struct inet_sock *inet = inet_sk(sk);
148 unsigned int ulen, copied;
151 int is_udplite = IS_UDPLITE(sk);
154 *addr_len=sizeof(struct sockaddr_in6);
156 if (flags & MSG_ERRQUEUE)
157 return ipv6_recv_error(sk, msg, len);
160 skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0),
165 ulen = skb->len - sizeof(struct udphdr);
169 else if (copied < ulen)
170 msg->msg_flags |= MSG_TRUNC;
173 * If checksum is needed at all, try to do it while copying the
174 * data. If the data is truncated, or if we only want a partial
175 * coverage checksum (UDP-Lite), do it before the copy.
178 if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
179 if (udp_lib_checksum_complete(skb))
183 if (skb_csum_unnecessary(skb))
184 err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
185 msg->msg_iov, copied );
187 err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
195 UDP6_INC_STATS_USER(sock_net(sk),
196 UDP_MIB_INDATAGRAMS, is_udplite);
198 sock_recv_timestamp(msg, sk, skb);
200 /* Copy the address. */
202 struct sockaddr_in6 *sin6;
204 sin6 = (struct sockaddr_in6 *) msg->msg_name;
205 sin6->sin6_family = AF_INET6;
206 sin6->sin6_port = udp_hdr(skb)->source;
207 sin6->sin6_flowinfo = 0;
208 sin6->sin6_scope_id = 0;
210 if (skb->protocol == htons(ETH_P_IP))
211 ipv6_addr_set(&sin6->sin6_addr, 0, 0,
212 htonl(0xffff), ip_hdr(skb)->saddr);
214 ipv6_addr_copy(&sin6->sin6_addr,
215 &ipv6_hdr(skb)->saddr);
216 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
217 sin6->sin6_scope_id = IP6CB(skb)->iif;
221 if (skb->protocol == htons(ETH_P_IP)) {
222 if (inet->cmsg_flags)
223 ip_cmsg_recv(msg, skb);
226 datagram_recv_ctl(sk, msg, skb);
230 if (flags & MSG_TRUNC)
235 skb_free_datagram(sk, skb);
242 if (!skb_kill_datagram(sk, skb, flags))
243 UDP6_INC_STATS_USER(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
246 if (flags & MSG_DONTWAIT)
251 void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
252 int type, int code, int offset, __be32 info,
253 struct udp_table *udptable)
255 struct ipv6_pinfo *np;
256 struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
257 struct in6_addr *saddr = &hdr->saddr;
258 struct in6_addr *daddr = &hdr->daddr;
259 struct udphdr *uh = (struct udphdr*)(skb->data+offset);
263 sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest,
264 saddr, uh->source, inet6_iif(skb), udptable);
270 if (!icmpv6_err_convert(type, code, &err) && !np->recverr)
273 if (sk->sk_state != TCP_ESTABLISHED && !np->recverr)
277 ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
280 sk->sk_error_report(sk);
285 static __inline__ void udpv6_err(struct sk_buff *skb,
286 struct inet6_skb_parm *opt, int type,
287 int code, int offset, __be32 info )
289 __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table);
292 int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
294 struct udp_sock *up = udp_sk(sk);
296 int is_udplite = IS_UDPLITE(sk);
298 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
302 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
304 if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) {
306 if (up->pcrlen == 0) { /* full coverage was set */
307 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage"
308 " %d while full coverage %d requested\n",
309 UDP_SKB_CB(skb)->cscov, skb->len);
312 if (UDP_SKB_CB(skb)->cscov < up->pcrlen) {
313 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d "
314 "too small, need min %d\n",
315 UDP_SKB_CB(skb)->cscov, up->pcrlen);
321 if (udp_lib_checksum_complete(skb))
325 if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
326 /* Note that an ENOMEM error is charged twice */
328 UDP6_INC_STATS_BH(sock_net(sk),
329 UDP_MIB_RCVBUFERRORS, is_udplite);
330 atomic_inc(&sk->sk_drops);
337 UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
342 static struct sock *udp_v6_mcast_next(struct sock *sk,
343 __be16 loc_port, struct in6_addr *loc_addr,
344 __be16 rmt_port, struct in6_addr *rmt_addr,
347 struct hlist_node *node;
349 unsigned short num = ntohs(loc_port);
351 sk_for_each_from(s, node) {
352 struct inet_sock *inet = inet_sk(s);
354 if (sock_net(s) != sock_net(sk))
357 if (s->sk_hash == num && s->sk_family == PF_INET6) {
358 struct ipv6_pinfo *np = inet6_sk(s);
360 if (inet->dport != rmt_port)
363 if (!ipv6_addr_any(&np->daddr) &&
364 !ipv6_addr_equal(&np->daddr, rmt_addr))
367 if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif)
370 if (!ipv6_addr_any(&np->rcv_saddr)) {
371 if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
374 if (!inet6_mc_check(s, loc_addr, rmt_addr))
383 * Note: called only from the BH handler context,
384 * so we don't need to lock the hashes.
386 static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
387 struct in6_addr *saddr, struct in6_addr *daddr,
388 struct udp_table *udptable)
390 struct sock *sk, *sk2;
391 const struct udphdr *uh = udp_hdr(skb);
392 struct udp_hslot *hslot = &udptable->hash[udp_hashfn(net, ntohs(uh->dest))];
395 spin_lock(&hslot->lock);
396 sk = sk_head(&hslot->head);
397 dif = inet6_iif(skb);
398 sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
405 while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr,
406 uh->source, saddr, dif))) {
407 struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
410 if (!sock_owned_by_user(sk2))
411 udpv6_queue_rcv_skb(sk2, buff);
413 sk_add_backlog(sk2, buff);
418 if (!sock_owned_by_user(sk))
419 udpv6_queue_rcv_skb(sk, skb);
421 sk_add_backlog(sk, skb);
424 spin_unlock(&hslot->lock);
428 static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
433 UDP_SKB_CB(skb)->partial_cov = 0;
434 UDP_SKB_CB(skb)->cscov = skb->len;
436 if (proto == IPPROTO_UDPLITE) {
437 err = udplite_checksum_init(skb, uh);
442 if (uh->check == 0) {
443 /* RFC 2460 section 8.1 says that we SHOULD log
444 this error. Well, it is reasonable.
446 LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
449 if (skb->ip_summed == CHECKSUM_COMPLETE &&
450 !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
451 skb->len, proto, skb->csum))
452 skb->ip_summed = CHECKSUM_UNNECESSARY;
454 if (!skb_csum_unnecessary(skb))
455 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
456 &ipv6_hdr(skb)->daddr,
457 skb->len, proto, 0));
462 int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
467 struct net_device *dev = skb->dev;
468 struct in6_addr *saddr, *daddr;
470 struct net *net = dev_net(skb->dev);
472 if (!pskb_may_pull(skb, sizeof(struct udphdr)))
475 saddr = &ipv6_hdr(skb)->saddr;
476 daddr = &ipv6_hdr(skb)->daddr;
479 ulen = ntohs(uh->len);
483 if (proto == IPPROTO_UDP) {
484 /* UDP validates ulen. */
486 /* Check for jumbo payload */
490 if (ulen < sizeof(*uh))
493 if (ulen < skb->len) {
494 if (pskb_trim_rcsum(skb, ulen))
496 saddr = &ipv6_hdr(skb)->saddr;
497 daddr = &ipv6_hdr(skb)->daddr;
502 if (udp6_csum_init(skb, uh, proto))
506 * Multicast receive code
508 if (ipv6_addr_is_multicast(daddr))
509 return __udp6_lib_mcast_deliver(net, skb,
510 saddr, daddr, udptable);
515 * check socket cache ... must talk to Alan about his plans
516 * for sock caches... i'll skip this for now.
518 sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable);
521 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
524 if (udp_lib_checksum_complete(skb))
526 UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS,
527 proto == IPPROTO_UDPLITE);
529 icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
538 if (!sock_owned_by_user(sk))
539 udpv6_queue_rcv_skb(sk, skb);
541 sk_add_backlog(sk, skb);
547 LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
548 proto == IPPROTO_UDPLITE ? "-Lite" : "",
552 UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
557 static __inline__ int udpv6_rcv(struct sk_buff *skb)
559 return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP);
563 * Throw away all pending data and cancel the corking. Socket is locked.
565 static void udp_v6_flush_pending_frames(struct sock *sk)
567 struct udp_sock *up = udp_sk(sk);
569 if (up->pending == AF_INET)
570 udp_flush_pending_frames(sk);
571 else if (up->pending) {
574 ip6_flush_pending_frames(sk);
582 static int udp_v6_push_pending_frames(struct sock *sk)
586 struct udp_sock *up = udp_sk(sk);
587 struct inet_sock *inet = inet_sk(sk);
588 struct flowi *fl = &inet->cork.fl;
590 int is_udplite = IS_UDPLITE(sk);
593 /* Grab the skbuff where UDP header space exists. */
594 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
598 * Create a UDP header
601 uh->source = fl->fl_ip_sport;
602 uh->dest = fl->fl_ip_dport;
603 uh->len = htons(up->len);
607 csum = udplite_csum_outgoing(sk, skb);
609 csum = udp_csum_outgoing(sk, skb);
611 /* add protocol-dependent pseudo-header */
612 uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst,
613 up->len, fl->proto, csum );
615 uh->check = CSUM_MANGLED_0;
617 err = ip6_push_pending_frames(sk);
622 UDP6_INC_STATS_USER(sock_net(sk),
623 UDP_MIB_OUTDATAGRAMS, is_udplite);
627 int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
628 struct msghdr *msg, size_t len)
630 struct ipv6_txoptions opt_space;
631 struct udp_sock *up = udp_sk(sk);
632 struct inet_sock *inet = inet_sk(sk);
633 struct ipv6_pinfo *np = inet6_sk(sk);
634 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
635 struct in6_addr *daddr, *final_p = NULL, final;
636 struct ipv6_txoptions *opt = NULL;
637 struct ip6_flowlabel *flowlabel = NULL;
639 struct dst_entry *dst;
640 int addr_len = msg->msg_namelen;
644 int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
647 int is_udplite = IS_UDPLITE(sk);
648 int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
650 /* destination address check */
652 if (addr_len < offsetof(struct sockaddr, sa_data))
655 switch (sin6->sin6_family) {
657 if (addr_len < SIN6_LEN_RFC2133)
659 daddr = &sin6->sin6_addr;
664 msg->msg_name = sin6 = NULL;
665 msg->msg_namelen = addr_len = 0;
671 } else if (!up->pending) {
672 if (sk->sk_state != TCP_ESTABLISHED)
673 return -EDESTADDRREQ;
679 if (ipv6_addr_v4mapped(daddr)) {
680 struct sockaddr_in sin;
681 sin.sin_family = AF_INET;
682 sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;
683 sin.sin_addr.s_addr = daddr->s6_addr32[3];
684 msg->msg_name = &sin;
685 msg->msg_namelen = sizeof(sin);
687 if (__ipv6_only_sock(sk))
689 return udp_sendmsg(iocb, sk, msg, len);
693 if (up->pending == AF_INET)
694 return udp_sendmsg(iocb, sk, msg, len);
696 /* Rough check on arithmetic overflow,
697 better check is made in ip6_append_data().
699 if (len > INT_MAX - sizeof(struct udphdr))
704 * There are pending frames.
705 * The socket lock must be held while it's corked.
708 if (likely(up->pending)) {
709 if (unlikely(up->pending != AF_INET6)) {
711 return -EAFNOSUPPORT;
718 ulen += sizeof(struct udphdr);
720 memset(&fl, 0, sizeof(fl));
723 if (sin6->sin6_port == 0)
726 fl.fl_ip_dport = sin6->sin6_port;
727 daddr = &sin6->sin6_addr;
730 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
731 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
732 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
733 if (flowlabel == NULL)
735 daddr = &flowlabel->dst;
740 * Otherwise it will be difficult to maintain
743 if (sk->sk_state == TCP_ESTABLISHED &&
744 ipv6_addr_equal(daddr, &np->daddr))
747 if (addr_len >= sizeof(struct sockaddr_in6) &&
748 sin6->sin6_scope_id &&
749 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
750 fl.oif = sin6->sin6_scope_id;
752 if (sk->sk_state != TCP_ESTABLISHED)
753 return -EDESTADDRREQ;
755 fl.fl_ip_dport = inet->dport;
757 fl.fl6_flowlabel = np->flow_label;
762 fl.oif = sk->sk_bound_dev_if;
764 if (msg->msg_controllen) {
766 memset(opt, 0, sizeof(struct ipv6_txoptions));
767 opt->tot_len = sizeof(*opt);
769 err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass);
771 fl6_sock_release(flowlabel);
774 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
775 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
776 if (flowlabel == NULL)
779 if (!(opt->opt_nflen|opt->opt_flen))
786 opt = fl6_merge_options(&opt_space, flowlabel, opt);
787 opt = ipv6_fixup_options(&opt_space, opt);
789 fl.proto = sk->sk_protocol;
790 if (!ipv6_addr_any(daddr))
791 ipv6_addr_copy(&fl.fl6_dst, daddr);
793 fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
794 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
795 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
796 fl.fl_ip_sport = inet->sport;
798 /* merge ip6_build_xmit from ip6_output */
799 if (opt && opt->srcrt) {
800 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
801 ipv6_addr_copy(&final, &fl.fl6_dst);
802 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
807 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
808 fl.oif = np->mcast_oif;
812 security_sk_classify_flow(sk, &fl);
814 err = ip6_sk_dst_lookup(sk, &dst, &fl);
818 ipv6_addr_copy(&fl.fl6_dst, final_p);
820 if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) {
822 err = ip6_dst_blackhole(sk, &dst, &fl);
828 if (ipv6_addr_is_multicast(&fl.fl6_dst))
829 hlimit = np->mcast_hops;
831 hlimit = np->hop_limit;
833 hlimit = ip6_dst_hoplimit(dst);
842 if (msg->msg_flags&MSG_CONFIRM)
847 if (unlikely(up->pending)) {
848 /* The socket is already corked while preparing it. */
849 /* ... which is an evident application bug. --ANK */
852 LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
857 up->pending = AF_INET6;
861 getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
862 err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,
863 sizeof(struct udphdr), hlimit, tclass, opt, &fl,
864 (struct rt6_info*)dst,
865 corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
867 udp_v6_flush_pending_frames(sk);
869 err = udp_v6_push_pending_frames(sk);
870 else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
875 ip6_dst_store(sk, dst,
876 ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
878 #ifdef CONFIG_IPV6_SUBTREES
879 ipv6_addr_equal(&fl.fl6_src, &np->saddr) ?
890 err = np->recverr ? net_xmit_errno(err) : 0;
894 fl6_sock_release(flowlabel);
898 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
899 * ENOBUFS might not be good (it's not tunable per se), but otherwise
900 * we don't have a good statistic (IpOutDiscards but it can be too many
901 * things). We could add another new stat but at least for now that
902 * seems like overkill.
904 if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
905 UDP6_INC_STATS_USER(sock_net(sk),
906 UDP_MIB_SNDBUFERRORS, is_udplite);
912 if (!(msg->msg_flags&MSG_PROBE) || len)
913 goto back_from_confirm;
918 void udpv6_destroy_sock(struct sock *sk)
921 udp_v6_flush_pending_frames(sk);
924 inet6_destroy_sock(sk);
928 * Socket option code for UDP
930 int udpv6_setsockopt(struct sock *sk, int level, int optname,
931 char __user *optval, int optlen)
933 if (level == SOL_UDP || level == SOL_UDPLITE)
934 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
935 udp_v6_push_pending_frames);
936 return ipv6_setsockopt(sk, level, optname, optval, optlen);
940 int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
941 char __user *optval, int optlen)
943 if (level == SOL_UDP || level == SOL_UDPLITE)
944 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
945 udp_v6_push_pending_frames);
946 return compat_ipv6_setsockopt(sk, level, optname, optval, optlen);
950 int udpv6_getsockopt(struct sock *sk, int level, int optname,
951 char __user *optval, int __user *optlen)
953 if (level == SOL_UDP || level == SOL_UDPLITE)
954 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
955 return ipv6_getsockopt(sk, level, optname, optval, optlen);
959 int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
960 char __user *optval, int __user *optlen)
962 if (level == SOL_UDP || level == SOL_UDPLITE)
963 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
964 return compat_ipv6_getsockopt(sk, level, optname, optval, optlen);
968 static struct inet6_protocol udpv6_protocol = {
969 .handler = udpv6_rcv,
970 .err_handler = udpv6_err,
971 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
974 /* ------------------------------------------------------------------------ */
975 #ifdef CONFIG_PROC_FS
977 static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket)
979 struct inet_sock *inet = inet_sk(sp);
980 struct ipv6_pinfo *np = inet6_sk(sp);
981 struct in6_addr *dest, *src;
985 src = &np->rcv_saddr;
986 destp = ntohs(inet->dport);
987 srcp = ntohs(inet->sport);
989 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
990 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
992 src->s6_addr32[0], src->s6_addr32[1],
993 src->s6_addr32[2], src->s6_addr32[3], srcp,
994 dest->s6_addr32[0], dest->s6_addr32[1],
995 dest->s6_addr32[2], dest->s6_addr32[3], destp,
997 atomic_read(&sp->sk_wmem_alloc),
998 atomic_read(&sp->sk_rmem_alloc),
1002 atomic_read(&sp->sk_refcnt), sp,
1003 atomic_read(&sp->sk_drops));
1006 int udp6_seq_show(struct seq_file *seq, void *v)
1008 if (v == SEQ_START_TOKEN)
1013 "st tx_queue rx_queue tr tm->when retrnsmt"
1014 " uid timeout inode ref pointer drops\n");
1016 udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket);
1020 static struct udp_seq_afinfo udp6_seq_afinfo = {
1023 .udp_table = &udp_table,
1025 .owner = THIS_MODULE,
1028 .show = udp6_seq_show,
1032 int udp6_proc_init(struct net *net)
1034 return udp_proc_register(net, &udp6_seq_afinfo);
1037 void udp6_proc_exit(struct net *net) {
1038 udp_proc_unregister(net, &udp6_seq_afinfo);
1040 #endif /* CONFIG_PROC_FS */
1042 /* ------------------------------------------------------------------------ */
1044 struct proto udpv6_prot = {
1046 .owner = THIS_MODULE,
1047 .close = udp_lib_close,
1048 .connect = ip6_datagram_connect,
1049 .disconnect = udp_disconnect,
1051 .destroy = udpv6_destroy_sock,
1052 .setsockopt = udpv6_setsockopt,
1053 .getsockopt = udpv6_getsockopt,
1054 .sendmsg = udpv6_sendmsg,
1055 .recvmsg = udpv6_recvmsg,
1056 .backlog_rcv = udpv6_queue_rcv_skb,
1057 .hash = udp_lib_hash,
1058 .unhash = udp_lib_unhash,
1059 .get_port = udp_v6_get_port,
1060 .memory_allocated = &udp_memory_allocated,
1061 .sysctl_mem = sysctl_udp_mem,
1062 .sysctl_wmem = &sysctl_udp_wmem_min,
1063 .sysctl_rmem = &sysctl_udp_rmem_min,
1064 .obj_size = sizeof(struct udp6_sock),
1065 .h.udp_table = &udp_table,
1066 #ifdef CONFIG_COMPAT
1067 .compat_setsockopt = compat_udpv6_setsockopt,
1068 .compat_getsockopt = compat_udpv6_getsockopt,
1072 static struct inet_protosw udpv6_protosw = {
1074 .protocol = IPPROTO_UDP,
1075 .prot = &udpv6_prot,
1076 .ops = &inet6_dgram_ops,
1078 .no_check = UDP_CSUM_DEFAULT,
1079 .flags = INET_PROTOSW_PERMANENT,
1083 int __init udpv6_init(void)
1087 ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP);
1091 ret = inet6_register_protosw(&udpv6_protosw);
1093 goto out_udpv6_protocol;
1098 inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
1102 void udpv6_exit(void)
1104 inet6_unregister_protosw(&udpv6_protosw);
1105 inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);