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/skbuff.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>
49 #include <linux/proc_fs.h>
50 #include <linux/seq_file.h>
53 DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
55 static inline int udp_v6_get_port(struct sock *sk, unsigned short snum)
57 return udp_get_port(sk, snum, ipv6_rcv_saddr_equal);
60 static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport,
61 struct in6_addr *daddr, __be16 dport,
62 int dif, struct hlist_head udptable[])
64 struct sock *sk, *result = NULL;
65 struct hlist_node *node;
66 unsigned short hnum = ntohs(dport);
69 read_lock(&udp_hash_lock);
70 sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
71 struct inet_sock *inet = inet_sk(sk);
73 if (sk->sk_hash == hnum && sk->sk_family == PF_INET6) {
74 struct ipv6_pinfo *np = inet6_sk(sk);
77 if (inet->dport != sport)
81 if (!ipv6_addr_any(&np->rcv_saddr)) {
82 if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
86 if (!ipv6_addr_any(&np->daddr)) {
87 if (!ipv6_addr_equal(&np->daddr, saddr))
91 if (sk->sk_bound_dev_if) {
92 if (sk->sk_bound_dev_if != dif)
99 } else if (score > badness) {
107 read_unlock(&udp_hash_lock);
112 * This should be easy, if there is something there we
113 * return it, otherwise we block.
116 int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
117 struct msghdr *msg, size_t len,
118 int noblock, int flags, int *addr_len)
120 struct ipv6_pinfo *np = inet6_sk(sk);
121 struct inet_sock *inet = inet_sk(sk);
123 unsigned int ulen, copied;
125 int is_udplite = IS_UDPLITE(sk);
128 *addr_len=sizeof(struct sockaddr_in6);
130 if (flags & MSG_ERRQUEUE)
131 return ipv6_recv_error(sk, msg, len);
134 skb = skb_recv_datagram(sk, flags, noblock, &err);
138 ulen = skb->len - sizeof(struct udphdr);
142 else if (copied < ulen)
143 msg->msg_flags |= MSG_TRUNC;
146 * If checksum is needed at all, try to do it while copying the
147 * data. If the data is truncated, or if we only want a partial
148 * coverage checksum (UDP-Lite), do it before the copy.
151 if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
152 if (udp_lib_checksum_complete(skb))
156 if (skb_csum_unnecessary(skb))
157 err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
158 msg->msg_iov, copied );
160 err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
167 sock_recv_timestamp(msg, sk, skb);
169 /* Copy the address. */
171 struct sockaddr_in6 *sin6;
173 sin6 = (struct sockaddr_in6 *) msg->msg_name;
174 sin6->sin6_family = AF_INET6;
175 sin6->sin6_port = udp_hdr(skb)->source;
176 sin6->sin6_flowinfo = 0;
177 sin6->sin6_scope_id = 0;
179 if (skb->protocol == htons(ETH_P_IP))
180 ipv6_addr_set(&sin6->sin6_addr, 0, 0,
181 htonl(0xffff), ip_hdr(skb)->saddr);
183 ipv6_addr_copy(&sin6->sin6_addr,
184 &ipv6_hdr(skb)->saddr);
185 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
186 sin6->sin6_scope_id = IP6CB(skb)->iif;
190 if (skb->protocol == htons(ETH_P_IP)) {
191 if (inet->cmsg_flags)
192 ip_cmsg_recv(msg, skb);
195 datagram_recv_ctl(sk, msg, skb);
199 if (flags & MSG_TRUNC)
203 skb_free_datagram(sk, skb);
208 skb_kill_datagram(sk, skb, flags);
210 if (flags & MSG_DONTWAIT) {
211 UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite);
217 void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
218 int type, int code, int offset, __be32 info,
219 struct hlist_head udptable[] )
221 struct ipv6_pinfo *np;
222 struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
223 struct in6_addr *saddr = &hdr->saddr;
224 struct in6_addr *daddr = &hdr->daddr;
225 struct udphdr *uh = (struct udphdr*)(skb->data+offset);
229 sk = __udp6_lib_lookup(daddr, uh->dest,
230 saddr, uh->source, inet6_iif(skb), udptable);
236 if (!icmpv6_err_convert(type, code, &err) && !np->recverr)
239 if (sk->sk_state != TCP_ESTABLISHED && !np->recverr)
243 ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
246 sk->sk_error_report(sk);
251 static __inline__ void udpv6_err(struct sk_buff *skb,
252 struct inet6_skb_parm *opt, int type,
253 int code, int offset, __be32 info )
255 return __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash);
258 int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
260 struct udp_sock *up = udp_sk(sk);
263 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
267 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
269 if ((up->pcflag & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) {
271 if (up->pcrlen == 0) { /* full coverage was set */
272 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage"
273 " %d while full coverage %d requested\n",
274 UDP_SKB_CB(skb)->cscov, skb->len);
277 if (UDP_SKB_CB(skb)->cscov < up->pcrlen) {
278 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d "
279 "too small, need min %d\n",
280 UDP_SKB_CB(skb)->cscov, up->pcrlen);
286 if (udp_lib_checksum_complete(skb))
290 if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
291 /* Note that an ENOMEM error is charged twice */
293 UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, up->pcflag);
296 UDP6_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag);
299 UDP6_INC_STATS_BH(UDP_MIB_INERRORS, up->pcflag);
304 static struct sock *udp_v6_mcast_next(struct sock *sk,
305 __be16 loc_port, struct in6_addr *loc_addr,
306 __be16 rmt_port, struct in6_addr *rmt_addr,
309 struct hlist_node *node;
311 unsigned short num = ntohs(loc_port);
313 sk_for_each_from(s, node) {
314 struct inet_sock *inet = inet_sk(s);
316 if (s->sk_hash == num && s->sk_family == PF_INET6) {
317 struct ipv6_pinfo *np = inet6_sk(s);
319 if (inet->dport != rmt_port)
322 if (!ipv6_addr_any(&np->daddr) &&
323 !ipv6_addr_equal(&np->daddr, rmt_addr))
326 if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif)
329 if (!ipv6_addr_any(&np->rcv_saddr)) {
330 if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
333 if (!inet6_mc_check(s, loc_addr, rmt_addr))
342 * Note: called only from the BH handler context,
343 * so we don't need to lock the hashes.
345 static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr,
346 struct in6_addr *daddr, struct hlist_head udptable[])
348 struct sock *sk, *sk2;
349 const struct udphdr *uh = udp_hdr(skb);
352 read_lock(&udp_hash_lock);
353 sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]);
354 dif = inet6_iif(skb);
355 sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
362 while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr,
363 uh->source, saddr, dif))) {
364 struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
366 udpv6_queue_rcv_skb(sk2, buff);
368 udpv6_queue_rcv_skb(sk, skb);
370 read_unlock(&udp_hash_lock);
374 static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
379 UDP_SKB_CB(skb)->partial_cov = 0;
380 UDP_SKB_CB(skb)->cscov = skb->len;
382 if (proto == IPPROTO_UDPLITE) {
383 err = udplite_checksum_init(skb, uh);
388 if (uh->check == 0) {
389 /* RFC 2460 section 8.1 says that we SHOULD log
390 this error. Well, it is reasonable.
392 LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
395 if (skb->ip_summed == CHECKSUM_COMPLETE &&
396 !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
397 skb->len, proto, skb->csum))
398 skb->ip_summed = CHECKSUM_UNNECESSARY;
400 if (!skb_csum_unnecessary(skb))
401 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
402 &ipv6_hdr(skb)->daddr,
403 skb->len, proto, 0));
408 int __udp6_lib_rcv(struct sk_buff **pskb, struct hlist_head udptable[],
411 struct sk_buff *skb = *pskb;
414 struct net_device *dev = skb->dev;
415 struct in6_addr *saddr, *daddr;
418 if (!pskb_may_pull(skb, sizeof(struct udphdr)))
421 saddr = &ipv6_hdr(skb)->saddr;
422 daddr = &ipv6_hdr(skb)->daddr;
425 ulen = ntohs(uh->len);
429 if (proto == IPPROTO_UDP) {
430 /* UDP validates ulen. */
432 /* Check for jumbo payload */
436 if (ulen < sizeof(*uh))
439 if (ulen < skb->len) {
440 if (pskb_trim_rcsum(skb, ulen))
442 saddr = &ipv6_hdr(skb)->saddr;
443 daddr = &ipv6_hdr(skb)->daddr;
448 if (udp6_csum_init(skb, uh, proto))
452 * Multicast receive code
454 if (ipv6_addr_is_multicast(daddr))
455 return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable);
460 * check socket cache ... must talk to Alan about his plans
461 * for sock caches... i'll skip this for now.
463 sk = __udp6_lib_lookup(saddr, uh->source,
464 daddr, uh->dest, inet6_iif(skb), udptable);
467 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
470 if (udp_lib_checksum_complete(skb))
472 UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE);
474 icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
482 udpv6_queue_rcv_skb(sk, skb);
487 LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
488 proto == IPPROTO_UDPLITE ? "-Lite" : "",
492 UDP6_INC_STATS_BH(UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
497 static __inline__ int udpv6_rcv(struct sk_buff **pskb)
499 return __udp6_lib_rcv(pskb, udp_hash, IPPROTO_UDP);
503 * Throw away all pending data and cancel the corking. Socket is locked.
505 static void udp_v6_flush_pending_frames(struct sock *sk)
507 struct udp_sock *up = udp_sk(sk);
512 ip6_flush_pending_frames(sk);
520 static int udp_v6_push_pending_frames(struct sock *sk)
524 struct udp_sock *up = udp_sk(sk);
525 struct inet_sock *inet = inet_sk(sk);
526 struct flowi *fl = &inet->cork.fl;
530 /* Grab the skbuff where UDP header space exists. */
531 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
535 * Create a UDP header
538 uh->source = fl->fl_ip_sport;
539 uh->dest = fl->fl_ip_dport;
540 uh->len = htons(up->len);
544 csum = udplite_csum_outgoing(sk, skb);
546 csum = udp_csum_outgoing(sk, skb);
548 /* add protocol-dependent pseudo-header */
549 uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst,
550 up->len, fl->proto, csum );
552 uh->check = CSUM_MANGLED_0;
554 err = ip6_push_pending_frames(sk);
561 int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
562 struct msghdr *msg, size_t len)
564 struct ipv6_txoptions opt_space;
565 struct udp_sock *up = udp_sk(sk);
566 struct inet_sock *inet = inet_sk(sk);
567 struct ipv6_pinfo *np = inet6_sk(sk);
568 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
569 struct in6_addr *daddr, *final_p = NULL, final;
570 struct ipv6_txoptions *opt = NULL;
571 struct ip6_flowlabel *flowlabel = NULL;
573 struct dst_entry *dst;
574 int addr_len = msg->msg_namelen;
578 int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
581 int is_udplite = up->pcflag;
582 int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
584 /* destination address check */
586 if (addr_len < offsetof(struct sockaddr, sa_data))
589 switch (sin6->sin6_family) {
591 if (addr_len < SIN6_LEN_RFC2133)
593 daddr = &sin6->sin6_addr;
598 msg->msg_name = sin6 = NULL;
599 msg->msg_namelen = addr_len = 0;
605 } else if (!up->pending) {
606 if (sk->sk_state != TCP_ESTABLISHED)
607 return -EDESTADDRREQ;
613 if (ipv6_addr_type(daddr) == IPV6_ADDR_MAPPED) {
614 struct sockaddr_in sin;
615 sin.sin_family = AF_INET;
616 sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;
617 sin.sin_addr.s_addr = daddr->s6_addr32[3];
618 msg->msg_name = &sin;
619 msg->msg_namelen = sizeof(sin);
621 if (__ipv6_only_sock(sk))
623 return udp_sendmsg(iocb, sk, msg, len);
627 if (up->pending == AF_INET)
628 return udp_sendmsg(iocb, sk, msg, len);
630 /* Rough check on arithmetic overflow,
631 better check is made in ip6_append_data().
633 if (len > INT_MAX - sizeof(struct udphdr))
638 * There are pending frames.
639 * The socket lock must be held while it's corked.
642 if (likely(up->pending)) {
643 if (unlikely(up->pending != AF_INET6)) {
645 return -EAFNOSUPPORT;
652 ulen += sizeof(struct udphdr);
654 memset(&fl, 0, sizeof(fl));
657 if (sin6->sin6_port == 0)
660 fl.fl_ip_dport = sin6->sin6_port;
661 daddr = &sin6->sin6_addr;
664 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
665 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
666 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
667 if (flowlabel == NULL)
669 daddr = &flowlabel->dst;
674 * Otherwise it will be difficult to maintain
677 if (sk->sk_state == TCP_ESTABLISHED &&
678 ipv6_addr_equal(daddr, &np->daddr))
681 if (addr_len >= sizeof(struct sockaddr_in6) &&
682 sin6->sin6_scope_id &&
683 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
684 fl.oif = sin6->sin6_scope_id;
686 if (sk->sk_state != TCP_ESTABLISHED)
687 return -EDESTADDRREQ;
689 fl.fl_ip_dport = inet->dport;
691 fl.fl6_flowlabel = np->flow_label;
696 fl.oif = sk->sk_bound_dev_if;
698 if (msg->msg_controllen) {
700 memset(opt, 0, sizeof(struct ipv6_txoptions));
701 opt->tot_len = sizeof(*opt);
703 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
705 fl6_sock_release(flowlabel);
708 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
709 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
710 if (flowlabel == NULL)
713 if (!(opt->opt_nflen|opt->opt_flen))
720 opt = fl6_merge_options(&opt_space, flowlabel, opt);
721 opt = ipv6_fixup_options(&opt_space, opt);
723 fl.proto = sk->sk_protocol;
724 ipv6_addr_copy(&fl.fl6_dst, daddr);
725 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
726 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
727 fl.fl_ip_sport = inet->sport;
729 /* merge ip6_build_xmit from ip6_output */
730 if (opt && opt->srcrt) {
731 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
732 ipv6_addr_copy(&final, &fl.fl6_dst);
733 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
738 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
739 fl.oif = np->mcast_oif;
743 security_sk_classify_flow(sk, &fl);
745 err = ip6_sk_dst_lookup(sk, &dst, &fl);
749 ipv6_addr_copy(&fl.fl6_dst, final_p);
751 if ((err = xfrm_lookup(&dst, &fl, sk, 1)) < 0)
755 if (ipv6_addr_is_multicast(&fl.fl6_dst))
756 hlimit = np->mcast_hops;
758 hlimit = np->hop_limit;
760 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
762 hlimit = ipv6_get_hoplimit(dst->dev);
771 if (msg->msg_flags&MSG_CONFIRM)
776 if (unlikely(up->pending)) {
777 /* The socket is already corked while preparing it. */
778 /* ... which is an evident application bug. --ANK */
781 LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
786 up->pending = AF_INET6;
790 getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
791 err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,
792 sizeof(struct udphdr), hlimit, tclass, opt, &fl,
793 (struct rt6_info*)dst,
794 corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
796 udp_v6_flush_pending_frames(sk);
798 err = udp_v6_push_pending_frames(sk);
799 else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
804 ip6_dst_store(sk, dst,
805 ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
807 #ifdef CONFIG_IPV6_SUBTREES
808 ipv6_addr_equal(&fl.fl6_src, &np->saddr) ?
818 err = np->recverr ? net_xmit_errno(err) : 0;
821 fl6_sock_release(flowlabel);
823 UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite);
827 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
828 * ENOBUFS might not be good (it's not tunable per se), but otherwise
829 * we don't have a good statistic (IpOutDiscards but it can be too many
830 * things). We could add another new stat but at least for now that
831 * seems like overkill.
833 if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
834 UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite);
840 if (!(msg->msg_flags&MSG_PROBE) || len)
841 goto back_from_confirm;
846 int udpv6_destroy_sock(struct sock *sk)
849 udp_v6_flush_pending_frames(sk);
852 inet6_destroy_sock(sk);
858 * Socket option code for UDP
860 int udpv6_setsockopt(struct sock *sk, int level, int optname,
861 char __user *optval, int optlen)
863 if (level == SOL_UDP || level == SOL_UDPLITE)
864 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
865 udp_v6_push_pending_frames);
866 return ipv6_setsockopt(sk, level, optname, optval, optlen);
870 int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
871 char __user *optval, int optlen)
873 if (level == SOL_UDP || level == SOL_UDPLITE)
874 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
875 udp_v6_push_pending_frames);
876 return compat_ipv6_setsockopt(sk, level, optname, optval, optlen);
880 int udpv6_getsockopt(struct sock *sk, int level, int optname,
881 char __user *optval, int __user *optlen)
883 if (level == SOL_UDP || level == SOL_UDPLITE)
884 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
885 return ipv6_getsockopt(sk, level, optname, optval, optlen);
889 int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
890 char __user *optval, int __user *optlen)
892 if (level == SOL_UDP || level == SOL_UDPLITE)
893 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
894 return compat_ipv6_getsockopt(sk, level, optname, optval, optlen);
898 static struct inet6_protocol udpv6_protocol = {
899 .handler = udpv6_rcv,
900 .err_handler = udpv6_err,
901 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
904 /* ------------------------------------------------------------------------ */
905 #ifdef CONFIG_PROC_FS
907 static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket)
909 struct inet_sock *inet = inet_sk(sp);
910 struct ipv6_pinfo *np = inet6_sk(sp);
911 struct in6_addr *dest, *src;
915 src = &np->rcv_saddr;
916 destp = ntohs(inet->dport);
917 srcp = ntohs(inet->sport);
919 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
920 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
922 src->s6_addr32[0], src->s6_addr32[1],
923 src->s6_addr32[2], src->s6_addr32[3], srcp,
924 dest->s6_addr32[0], dest->s6_addr32[1],
925 dest->s6_addr32[2], dest->s6_addr32[3], destp,
927 atomic_read(&sp->sk_wmem_alloc),
928 atomic_read(&sp->sk_rmem_alloc),
932 atomic_read(&sp->sk_refcnt), sp);
935 int udp6_seq_show(struct seq_file *seq, void *v)
937 if (v == SEQ_START_TOKEN)
942 "st tx_queue rx_queue tr tm->when retrnsmt"
943 " uid timeout inode\n");
945 udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket);
949 static struct file_operations udp6_seq_fops;
950 static struct udp_seq_afinfo udp6_seq_afinfo = {
951 .owner = THIS_MODULE,
954 .hashtable = udp_hash,
955 .seq_show = udp6_seq_show,
956 .seq_fops = &udp6_seq_fops,
959 int __init udp6_proc_init(void)
961 return udp_proc_register(&udp6_seq_afinfo);
964 void udp6_proc_exit(void) {
965 udp_proc_unregister(&udp6_seq_afinfo);
967 #endif /* CONFIG_PROC_FS */
969 /* ------------------------------------------------------------------------ */
971 struct proto udpv6_prot = {
973 .owner = THIS_MODULE,
974 .close = udp_lib_close,
975 .connect = ip6_datagram_connect,
976 .disconnect = udp_disconnect,
978 .destroy = udpv6_destroy_sock,
979 .setsockopt = udpv6_setsockopt,
980 .getsockopt = udpv6_getsockopt,
981 .sendmsg = udpv6_sendmsg,
982 .recvmsg = udpv6_recvmsg,
983 .backlog_rcv = udpv6_queue_rcv_skb,
984 .hash = udp_lib_hash,
985 .unhash = udp_lib_unhash,
986 .get_port = udp_v6_get_port,
987 .obj_size = sizeof(struct udp6_sock),
989 .compat_setsockopt = compat_udpv6_setsockopt,
990 .compat_getsockopt = compat_udpv6_getsockopt,
994 static struct inet_protosw udpv6_protosw = {
996 .protocol = IPPROTO_UDP,
998 .ops = &inet6_dgram_ops,
1000 .no_check = UDP_CSUM_DEFAULT,
1001 .flags = INET_PROTOSW_PERMANENT,
1005 void __init udpv6_init(void)
1007 if (inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP) < 0)
1008 printk(KERN_ERR "udpv6_init: Could not register protocol\n");
1009 inet6_register_protosw(&udpv6_protosw);