3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Based on linux/ipv4/udp.c
10 * $Id: udp.c,v 1.65 2002/02/01 22:01:04 davem Exp $
13 * Hideaki YOSHIFUJI : sin6_scope_id support
14 * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which
15 * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind
16 * a single port at the same time.
17 * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
18 * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file.
20 * This program is free software; you can redistribute it and/or
21 * modify it under the terms of the GNU General Public License
22 * as published by the Free Software Foundation; either version
23 * 2 of the License, or (at your option) any later version.
26 #include <linux/errno.h>
27 #include <linux/types.h>
28 #include <linux/socket.h>
29 #include <linux/sockios.h>
30 #include <linux/net.h>
31 #include <linux/in6.h>
32 #include <linux/netdevice.h>
33 #include <linux/if_arp.h>
34 #include <linux/ipv6.h>
35 #include <linux/icmpv6.h>
36 #include <linux/init.h>
37 #include <linux/module.h>
38 #include <linux/skbuff.h>
39 #include <asm/uaccess.h>
41 #include <net/ndisc.h>
42 #include <net/protocol.h>
43 #include <net/transp_v6.h>
44 #include <net/ip6_route.h>
46 #include <net/tcp_states.h>
47 #include <net/ip6_checksum.h>
50 #include <linux/proc_fs.h>
51 #include <linux/seq_file.h>
54 DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
55 EXPORT_SYMBOL(udp_stats_in6);
57 static inline int udp_v6_get_port(struct sock *sk, unsigned short snum)
59 return udp_get_port(sk, snum, ipv6_rcv_saddr_equal);
62 static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport,
63 struct in6_addr *daddr, __be16 dport,
64 int dif, struct hlist_head udptable[])
66 struct sock *sk, *result = NULL;
67 struct hlist_node *node;
68 unsigned short hnum = ntohs(dport);
71 read_lock(&udp_hash_lock);
72 sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
73 struct inet_sock *inet = inet_sk(sk);
75 if (sk->sk_hash == hnum && sk->sk_family == PF_INET6) {
76 struct ipv6_pinfo *np = inet6_sk(sk);
79 if (inet->dport != sport)
83 if (!ipv6_addr_any(&np->rcv_saddr)) {
84 if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
88 if (!ipv6_addr_any(&np->daddr)) {
89 if (!ipv6_addr_equal(&np->daddr, saddr))
93 if (sk->sk_bound_dev_if) {
94 if (sk->sk_bound_dev_if != dif)
101 } else if (score > badness) {
109 read_unlock(&udp_hash_lock);
114 * This should be easy, if there is something there we
115 * return it, otherwise we block.
118 int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
119 struct msghdr *msg, size_t len,
120 int noblock, int flags, int *addr_len)
122 struct ipv6_pinfo *np = inet6_sk(sk);
123 struct inet_sock *inet = inet_sk(sk);
125 unsigned int ulen, copied;
127 int is_udplite = IS_UDPLITE(sk);
130 *addr_len=sizeof(struct sockaddr_in6);
132 if (flags & MSG_ERRQUEUE)
133 return ipv6_recv_error(sk, msg, len);
136 skb = skb_recv_datagram(sk, flags, noblock, &err);
140 ulen = skb->len - sizeof(struct udphdr);
144 else if (copied < ulen)
145 msg->msg_flags |= MSG_TRUNC;
148 * If checksum is needed at all, try to do it while copying the
149 * data. If the data is truncated, or if we only want a partial
150 * coverage checksum (UDP-Lite), do it before the copy.
153 if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
154 if (udp_lib_checksum_complete(skb))
158 if (skb_csum_unnecessary(skb))
159 err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
160 msg->msg_iov, copied );
162 err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
169 UDP6_INC_STATS_USER(UDP_MIB_INDATAGRAMS, is_udplite);
171 sock_recv_timestamp(msg, sk, skb);
173 /* Copy the address. */
175 struct sockaddr_in6 *sin6;
177 sin6 = (struct sockaddr_in6 *) msg->msg_name;
178 sin6->sin6_family = AF_INET6;
179 sin6->sin6_port = udp_hdr(skb)->source;
180 sin6->sin6_flowinfo = 0;
181 sin6->sin6_scope_id = 0;
183 if (skb->protocol == htons(ETH_P_IP))
184 ipv6_addr_set(&sin6->sin6_addr, 0, 0,
185 htonl(0xffff), ip_hdr(skb)->saddr);
187 ipv6_addr_copy(&sin6->sin6_addr,
188 &ipv6_hdr(skb)->saddr);
189 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
190 sin6->sin6_scope_id = IP6CB(skb)->iif;
194 if (skb->protocol == htons(ETH_P_IP)) {
195 if (inet->cmsg_flags)
196 ip_cmsg_recv(msg, skb);
199 datagram_recv_ctl(sk, msg, skb);
203 if (flags & MSG_TRUNC)
207 skb_free_datagram(sk, skb);
212 if (!skb_kill_datagram(sk, skb, flags))
213 UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite);
215 if (flags & MSG_DONTWAIT)
220 void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
221 int type, int code, int offset, __be32 info,
222 struct hlist_head udptable[] )
224 struct ipv6_pinfo *np;
225 struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
226 struct in6_addr *saddr = &hdr->saddr;
227 struct in6_addr *daddr = &hdr->daddr;
228 struct udphdr *uh = (struct udphdr*)(skb->data+offset);
232 sk = __udp6_lib_lookup(daddr, uh->dest,
233 saddr, uh->source, inet6_iif(skb), udptable);
239 if (!icmpv6_err_convert(type, code, &err) && !np->recverr)
242 if (sk->sk_state != TCP_ESTABLISHED && !np->recverr)
246 ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
249 sk->sk_error_report(sk);
254 static __inline__ void udpv6_err(struct sk_buff *skb,
255 struct inet6_skb_parm *opt, int type,
256 int code, int offset, __be32 info )
258 return __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash);
261 int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
263 struct udp_sock *up = udp_sk(sk);
265 int is_udplite = IS_UDPLITE(sk);
267 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
271 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
273 if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) {
275 if (up->pcrlen == 0) { /* full coverage was set */
276 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage"
277 " %d while full coverage %d requested\n",
278 UDP_SKB_CB(skb)->cscov, skb->len);
281 if (UDP_SKB_CB(skb)->cscov < up->pcrlen) {
282 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d "
283 "too small, need min %d\n",
284 UDP_SKB_CB(skb)->cscov, up->pcrlen);
290 if (udp_lib_checksum_complete(skb))
294 if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
295 /* Note that an ENOMEM error is charged twice */
297 UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, is_udplite);
303 UDP6_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite);
308 static struct sock *udp_v6_mcast_next(struct sock *sk,
309 __be16 loc_port, struct in6_addr *loc_addr,
310 __be16 rmt_port, struct in6_addr *rmt_addr,
313 struct hlist_node *node;
315 unsigned short num = ntohs(loc_port);
317 sk_for_each_from(s, node) {
318 struct inet_sock *inet = inet_sk(s);
320 if (s->sk_hash == num && s->sk_family == PF_INET6) {
321 struct ipv6_pinfo *np = inet6_sk(s);
323 if (inet->dport != rmt_port)
326 if (!ipv6_addr_any(&np->daddr) &&
327 !ipv6_addr_equal(&np->daddr, rmt_addr))
330 if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif)
333 if (!ipv6_addr_any(&np->rcv_saddr)) {
334 if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
337 if (!inet6_mc_check(s, loc_addr, rmt_addr))
346 * Note: called only from the BH handler context,
347 * so we don't need to lock the hashes.
349 static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr,
350 struct in6_addr *daddr, struct hlist_head udptable[])
352 struct sock *sk, *sk2;
353 const struct udphdr *uh = udp_hdr(skb);
356 read_lock(&udp_hash_lock);
357 sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]);
358 dif = inet6_iif(skb);
359 sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
366 while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr,
367 uh->source, saddr, dif))) {
368 struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
370 udpv6_queue_rcv_skb(sk2, buff);
372 udpv6_queue_rcv_skb(sk, skb);
374 read_unlock(&udp_hash_lock);
378 static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
383 UDP_SKB_CB(skb)->partial_cov = 0;
384 UDP_SKB_CB(skb)->cscov = skb->len;
386 if (proto == IPPROTO_UDPLITE) {
387 err = udplite_checksum_init(skb, uh);
392 if (uh->check == 0) {
393 /* RFC 2460 section 8.1 says that we SHOULD log
394 this error. Well, it is reasonable.
396 LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
399 if (skb->ip_summed == CHECKSUM_COMPLETE &&
400 !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
401 skb->len, proto, skb->csum))
402 skb->ip_summed = CHECKSUM_UNNECESSARY;
404 if (!skb_csum_unnecessary(skb))
405 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
406 &ipv6_hdr(skb)->daddr,
407 skb->len, proto, 0));
412 int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
417 struct net_device *dev = skb->dev;
418 struct in6_addr *saddr, *daddr;
421 if (!pskb_may_pull(skb, sizeof(struct udphdr)))
424 saddr = &ipv6_hdr(skb)->saddr;
425 daddr = &ipv6_hdr(skb)->daddr;
428 ulen = ntohs(uh->len);
432 if (proto == IPPROTO_UDP) {
433 /* UDP validates ulen. */
435 /* Check for jumbo payload */
439 if (ulen < sizeof(*uh))
442 if (ulen < skb->len) {
443 if (pskb_trim_rcsum(skb, ulen))
445 saddr = &ipv6_hdr(skb)->saddr;
446 daddr = &ipv6_hdr(skb)->daddr;
451 if (udp6_csum_init(skb, uh, proto))
455 * Multicast receive code
457 if (ipv6_addr_is_multicast(daddr))
458 return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable);
463 * check socket cache ... must talk to Alan about his plans
464 * for sock caches... i'll skip this for now.
466 sk = __udp6_lib_lookup(saddr, uh->source,
467 daddr, uh->dest, inet6_iif(skb), udptable);
470 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
473 if (udp_lib_checksum_complete(skb))
475 UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE);
477 icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
485 udpv6_queue_rcv_skb(sk, skb);
490 LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
491 proto == IPPROTO_UDPLITE ? "-Lite" : "",
495 UDP6_INC_STATS_BH(UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
500 static __inline__ int udpv6_rcv(struct sk_buff *skb)
502 return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP);
506 * Throw away all pending data and cancel the corking. Socket is locked.
508 static void udp_v6_flush_pending_frames(struct sock *sk)
510 struct udp_sock *up = udp_sk(sk);
515 ip6_flush_pending_frames(sk);
523 static int udp_v6_push_pending_frames(struct sock *sk)
527 struct udp_sock *up = udp_sk(sk);
528 struct inet_sock *inet = inet_sk(sk);
529 struct flowi *fl = &inet->cork.fl;
531 int is_udplite = IS_UDPLITE(sk);
534 /* Grab the skbuff where UDP header space exists. */
535 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
539 * Create a UDP header
542 uh->source = fl->fl_ip_sport;
543 uh->dest = fl->fl_ip_dport;
544 uh->len = htons(up->len);
548 csum = udplite_csum_outgoing(sk, skb);
550 csum = udp_csum_outgoing(sk, skb);
552 /* add protocol-dependent pseudo-header */
553 uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst,
554 up->len, fl->proto, csum );
556 uh->check = CSUM_MANGLED_0;
558 err = ip6_push_pending_frames(sk);
563 UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite);
567 int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
568 struct msghdr *msg, size_t len)
570 struct ipv6_txoptions opt_space;
571 struct udp_sock *up = udp_sk(sk);
572 struct inet_sock *inet = inet_sk(sk);
573 struct ipv6_pinfo *np = inet6_sk(sk);
574 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
575 struct in6_addr *daddr, *final_p = NULL, final;
576 struct ipv6_txoptions *opt = NULL;
577 struct ip6_flowlabel *flowlabel = NULL;
579 struct dst_entry *dst;
580 int addr_len = msg->msg_namelen;
584 int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
587 int is_udplite = IS_UDPLITE(sk);
588 int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
590 /* destination address check */
592 if (addr_len < offsetof(struct sockaddr, sa_data))
595 switch (sin6->sin6_family) {
597 if (addr_len < SIN6_LEN_RFC2133)
599 daddr = &sin6->sin6_addr;
604 msg->msg_name = sin6 = NULL;
605 msg->msg_namelen = addr_len = 0;
611 } else if (!up->pending) {
612 if (sk->sk_state != TCP_ESTABLISHED)
613 return -EDESTADDRREQ;
619 if (ipv6_addr_v4mapped(daddr)) {
620 struct sockaddr_in sin;
621 sin.sin_family = AF_INET;
622 sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;
623 sin.sin_addr.s_addr = daddr->s6_addr32[3];
624 msg->msg_name = &sin;
625 msg->msg_namelen = sizeof(sin);
627 if (__ipv6_only_sock(sk))
629 return udp_sendmsg(iocb, sk, msg, len);
633 if (up->pending == AF_INET)
634 return udp_sendmsg(iocb, sk, msg, len);
636 /* Rough check on arithmetic overflow,
637 better check is made in ip6_append_data().
639 if (len > INT_MAX - sizeof(struct udphdr))
644 * There are pending frames.
645 * The socket lock must be held while it's corked.
648 if (likely(up->pending)) {
649 if (unlikely(up->pending != AF_INET6)) {
651 return -EAFNOSUPPORT;
658 ulen += sizeof(struct udphdr);
660 memset(&fl, 0, sizeof(fl));
663 if (sin6->sin6_port == 0)
666 fl.fl_ip_dport = sin6->sin6_port;
667 daddr = &sin6->sin6_addr;
670 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
671 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
672 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
673 if (flowlabel == NULL)
675 daddr = &flowlabel->dst;
680 * Otherwise it will be difficult to maintain
683 if (sk->sk_state == TCP_ESTABLISHED &&
684 ipv6_addr_equal(daddr, &np->daddr))
687 if (addr_len >= sizeof(struct sockaddr_in6) &&
688 sin6->sin6_scope_id &&
689 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
690 fl.oif = sin6->sin6_scope_id;
692 if (sk->sk_state != TCP_ESTABLISHED)
693 return -EDESTADDRREQ;
695 fl.fl_ip_dport = inet->dport;
697 fl.fl6_flowlabel = np->flow_label;
702 fl.oif = sk->sk_bound_dev_if;
704 if (msg->msg_controllen) {
706 memset(opt, 0, sizeof(struct ipv6_txoptions));
707 opt->tot_len = sizeof(*opt);
709 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
711 fl6_sock_release(flowlabel);
714 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
715 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
716 if (flowlabel == NULL)
719 if (!(opt->opt_nflen|opt->opt_flen))
726 opt = fl6_merge_options(&opt_space, flowlabel, opt);
727 opt = ipv6_fixup_options(&opt_space, opt);
729 fl.proto = sk->sk_protocol;
730 ipv6_addr_copy(&fl.fl6_dst, daddr);
731 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
732 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
733 fl.fl_ip_sport = inet->sport;
735 /* merge ip6_build_xmit from ip6_output */
736 if (opt && opt->srcrt) {
737 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
738 ipv6_addr_copy(&final, &fl.fl6_dst);
739 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
744 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
745 fl.oif = np->mcast_oif;
749 security_sk_classify_flow(sk, &fl);
751 err = ip6_sk_dst_lookup(sk, &dst, &fl);
755 ipv6_addr_copy(&fl.fl6_dst, final_p);
757 if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) {
759 err = ip6_dst_blackhole(sk, &dst, &fl);
765 if (ipv6_addr_is_multicast(&fl.fl6_dst))
766 hlimit = np->mcast_hops;
768 hlimit = np->hop_limit;
770 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
772 hlimit = ipv6_get_hoplimit(dst->dev);
781 if (msg->msg_flags&MSG_CONFIRM)
786 if (unlikely(up->pending)) {
787 /* The socket is already corked while preparing it. */
788 /* ... which is an evident application bug. --ANK */
791 LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
796 up->pending = AF_INET6;
800 getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
801 err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,
802 sizeof(struct udphdr), hlimit, tclass, opt, &fl,
803 (struct rt6_info*)dst,
804 corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
806 udp_v6_flush_pending_frames(sk);
808 err = udp_v6_push_pending_frames(sk);
809 else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
814 ip6_dst_store(sk, dst,
815 ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
817 #ifdef CONFIG_IPV6_SUBTREES
818 ipv6_addr_equal(&fl.fl6_src, &np->saddr) ?
828 err = np->recverr ? net_xmit_errno(err) : 0;
831 fl6_sock_release(flowlabel);
835 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
836 * ENOBUFS might not be good (it's not tunable per se), but otherwise
837 * we don't have a good statistic (IpOutDiscards but it can be too many
838 * things). We could add another new stat but at least for now that
839 * seems like overkill.
841 if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
842 UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite);
848 if (!(msg->msg_flags&MSG_PROBE) || len)
849 goto back_from_confirm;
854 int udpv6_destroy_sock(struct sock *sk)
857 udp_v6_flush_pending_frames(sk);
860 inet6_destroy_sock(sk);
866 * Socket option code for UDP
868 int udpv6_setsockopt(struct sock *sk, int level, int optname,
869 char __user *optval, int optlen)
871 if (level == SOL_UDP || level == SOL_UDPLITE)
872 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
873 udp_v6_push_pending_frames);
874 return ipv6_setsockopt(sk, level, optname, optval, optlen);
878 int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
879 char __user *optval, int optlen)
881 if (level == SOL_UDP || level == SOL_UDPLITE)
882 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
883 udp_v6_push_pending_frames);
884 return compat_ipv6_setsockopt(sk, level, optname, optval, optlen);
888 int udpv6_getsockopt(struct sock *sk, int level, int optname,
889 char __user *optval, int __user *optlen)
891 if (level == SOL_UDP || level == SOL_UDPLITE)
892 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
893 return ipv6_getsockopt(sk, level, optname, optval, optlen);
897 int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
898 char __user *optval, int __user *optlen)
900 if (level == SOL_UDP || level == SOL_UDPLITE)
901 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
902 return compat_ipv6_getsockopt(sk, level, optname, optval, optlen);
906 static struct inet6_protocol udpv6_protocol = {
907 .handler = udpv6_rcv,
908 .err_handler = udpv6_err,
909 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
912 /* ------------------------------------------------------------------------ */
913 #ifdef CONFIG_PROC_FS
915 static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket)
917 struct inet_sock *inet = inet_sk(sp);
918 struct ipv6_pinfo *np = inet6_sk(sp);
919 struct in6_addr *dest, *src;
923 src = &np->rcv_saddr;
924 destp = ntohs(inet->dport);
925 srcp = ntohs(inet->sport);
927 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
928 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
930 src->s6_addr32[0], src->s6_addr32[1],
931 src->s6_addr32[2], src->s6_addr32[3], srcp,
932 dest->s6_addr32[0], dest->s6_addr32[1],
933 dest->s6_addr32[2], dest->s6_addr32[3], destp,
935 atomic_read(&sp->sk_wmem_alloc),
936 atomic_read(&sp->sk_rmem_alloc),
940 atomic_read(&sp->sk_refcnt), sp);
943 int udp6_seq_show(struct seq_file *seq, void *v)
945 if (v == SEQ_START_TOKEN)
950 "st tx_queue rx_queue tr tm->when retrnsmt"
951 " uid timeout inode\n");
953 udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket);
957 static struct file_operations udp6_seq_fops;
958 static struct udp_seq_afinfo udp6_seq_afinfo = {
959 .owner = THIS_MODULE,
962 .hashtable = udp_hash,
963 .seq_show = udp6_seq_show,
964 .seq_fops = &udp6_seq_fops,
967 int __init udp6_proc_init(void)
969 return udp_proc_register(&udp6_seq_afinfo);
972 void udp6_proc_exit(void) {
973 udp_proc_unregister(&udp6_seq_afinfo);
975 #endif /* CONFIG_PROC_FS */
977 /* ------------------------------------------------------------------------ */
979 DEFINE_PROTO_INUSE(udpv6)
981 struct proto udpv6_prot = {
983 .owner = THIS_MODULE,
984 .close = udp_lib_close,
985 .connect = ip6_datagram_connect,
986 .disconnect = udp_disconnect,
988 .destroy = udpv6_destroy_sock,
989 .setsockopt = udpv6_setsockopt,
990 .getsockopt = udpv6_getsockopt,
991 .sendmsg = udpv6_sendmsg,
992 .recvmsg = udpv6_recvmsg,
993 .backlog_rcv = udpv6_queue_rcv_skb,
994 .hash = udp_lib_hash,
995 .unhash = udp_lib_unhash,
996 .get_port = udp_v6_get_port,
997 .obj_size = sizeof(struct udp6_sock),
999 .compat_setsockopt = compat_udpv6_setsockopt,
1000 .compat_getsockopt = compat_udpv6_getsockopt,
1002 REF_PROTO_INUSE(udpv6)
1005 static struct inet_protosw udpv6_protosw = {
1007 .protocol = IPPROTO_UDP,
1008 .prot = &udpv6_prot,
1009 .ops = &inet6_dgram_ops,
1011 .no_check = UDP_CSUM_DEFAULT,
1012 .flags = INET_PROTOSW_PERMANENT,
1016 void __init udpv6_init(void)
1018 if (inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP) < 0)
1019 printk(KERN_ERR "udpv6_init: Could not register protocol\n");
1020 inet6_register_protosw(&udpv6_protosw);