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 struct sock *__udp6_lib_lookup(struct net *net,
58 struct in6_addr *saddr, __be16 sport,
59 struct in6_addr *daddr, __be16 dport,
60 int dif, struct hlist_head udptable[])
62 struct sock *sk, *result = NULL;
63 struct hlist_node *node;
64 unsigned short hnum = ntohs(dport);
67 read_lock(&udp_hash_lock);
68 sk_for_each(sk, node, &udptable[udp_hashfn(hnum)]) {
69 struct inet_sock *inet = inet_sk(sk);
71 if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum &&
72 sk->sk_family == PF_INET6) {
73 struct ipv6_pinfo *np = inet6_sk(sk);
76 if (inet->dport != sport)
80 if (!ipv6_addr_any(&np->rcv_saddr)) {
81 if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
85 if (!ipv6_addr_any(&np->daddr)) {
86 if (!ipv6_addr_equal(&np->daddr, saddr))
90 if (sk->sk_bound_dev_if) {
91 if (sk->sk_bound_dev_if != dif)
98 } else if (score > badness) {
106 read_unlock(&udp_hash_lock);
111 * This should be easy, if there is something there we
112 * return it, otherwise we block.
115 int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
116 struct msghdr *msg, size_t len,
117 int noblock, int flags, int *addr_len)
119 struct ipv6_pinfo *np = inet6_sk(sk);
120 struct inet_sock *inet = inet_sk(sk);
122 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 ? MSG_DONTWAIT : 0),
139 ulen = skb->len - sizeof(struct udphdr);
143 else if (copied < ulen)
144 msg->msg_flags |= MSG_TRUNC;
147 * If checksum is needed at all, try to do it while copying the
148 * data. If the data is truncated, or if we only want a partial
149 * coverage checksum (UDP-Lite), do it before the copy.
152 if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) {
153 if (udp_lib_checksum_complete(skb))
157 if (skb_csum_unnecessary(skb))
158 err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
159 msg->msg_iov, copied );
161 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)
208 skb_free_datagram(sk, skb);
215 if (!skb_kill_datagram(sk, skb, flags))
216 UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite);
219 if (flags & MSG_DONTWAIT)
224 void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
225 int type, int code, int offset, __be32 info,
226 struct hlist_head udptable[] )
228 struct ipv6_pinfo *np;
229 struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
230 struct in6_addr *saddr = &hdr->saddr;
231 struct in6_addr *daddr = &hdr->daddr;
232 struct udphdr *uh = (struct udphdr*)(skb->data+offset);
236 sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest,
237 saddr, uh->source, inet6_iif(skb), udptable);
243 if (!icmpv6_err_convert(type, code, &err) && !np->recverr)
246 if (sk->sk_state != TCP_ESTABLISHED && !np->recverr)
250 ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
253 sk->sk_error_report(sk);
258 static __inline__ void udpv6_err(struct sk_buff *skb,
259 struct inet6_skb_parm *opt, int type,
260 int code, int offset, __be32 info )
262 __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash);
265 int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
267 struct udp_sock *up = udp_sk(sk);
269 int is_udplite = IS_UDPLITE(sk);
271 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
275 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
277 if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) {
279 if (up->pcrlen == 0) { /* full coverage was set */
280 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage"
281 " %d while full coverage %d requested\n",
282 UDP_SKB_CB(skb)->cscov, skb->len);
285 if (UDP_SKB_CB(skb)->cscov < up->pcrlen) {
286 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d "
287 "too small, need min %d\n",
288 UDP_SKB_CB(skb)->cscov, up->pcrlen);
294 if (udp_lib_checksum_complete(skb))
298 if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
299 /* Note that an ENOMEM error is charged twice */
301 UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, is_udplite);
307 UDP6_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite);
312 static struct sock *udp_v6_mcast_next(struct sock *sk,
313 __be16 loc_port, struct in6_addr *loc_addr,
314 __be16 rmt_port, struct in6_addr *rmt_addr,
317 struct hlist_node *node;
319 unsigned short num = ntohs(loc_port);
321 sk_for_each_from(s, node) {
322 struct inet_sock *inet = inet_sk(s);
324 if (sock_net(s) != sock_net(sk))
327 if (s->sk_hash == num && s->sk_family == PF_INET6) {
328 struct ipv6_pinfo *np = inet6_sk(s);
330 if (inet->dport != rmt_port)
333 if (!ipv6_addr_any(&np->daddr) &&
334 !ipv6_addr_equal(&np->daddr, rmt_addr))
337 if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif)
340 if (!ipv6_addr_any(&np->rcv_saddr)) {
341 if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
344 if (!inet6_mc_check(s, loc_addr, rmt_addr))
353 * Note: called only from the BH handler context,
354 * so we don't need to lock the hashes.
356 static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
357 struct in6_addr *saddr, struct in6_addr *daddr,
358 struct hlist_head udptable[])
360 struct sock *sk, *sk2;
361 const struct udphdr *uh = udp_hdr(skb);
364 read_lock(&udp_hash_lock);
365 sk = sk_head(&udptable[udp_hashfn(ntohs(uh->dest))]);
366 dif = inet6_iif(skb);
367 sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
374 while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr,
375 uh->source, saddr, dif))) {
376 struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
378 bh_lock_sock_nested(sk2);
379 if (!sock_owned_by_user(sk2))
380 udpv6_queue_rcv_skb(sk2, buff);
382 sk_add_backlog(sk2, buff);
386 bh_lock_sock_nested(sk);
387 if (!sock_owned_by_user(sk))
388 udpv6_queue_rcv_skb(sk, skb);
390 sk_add_backlog(sk, skb);
393 read_unlock(&udp_hash_lock);
397 static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
402 UDP_SKB_CB(skb)->partial_cov = 0;
403 UDP_SKB_CB(skb)->cscov = skb->len;
405 if (proto == IPPROTO_UDPLITE) {
406 err = udplite_checksum_init(skb, uh);
411 if (uh->check == 0) {
412 /* RFC 2460 section 8.1 says that we SHOULD log
413 this error. Well, it is reasonable.
415 LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
418 if (skb->ip_summed == CHECKSUM_COMPLETE &&
419 !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
420 skb->len, proto, skb->csum))
421 skb->ip_summed = CHECKSUM_UNNECESSARY;
423 if (!skb_csum_unnecessary(skb))
424 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
425 &ipv6_hdr(skb)->daddr,
426 skb->len, proto, 0));
431 int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
436 struct net_device *dev = skb->dev;
437 struct in6_addr *saddr, *daddr;
441 if (!pskb_may_pull(skb, sizeof(struct udphdr)))
444 saddr = &ipv6_hdr(skb)->saddr;
445 daddr = &ipv6_hdr(skb)->daddr;
448 ulen = ntohs(uh->len);
452 if (proto == IPPROTO_UDP) {
453 /* UDP validates ulen. */
455 /* Check for jumbo payload */
459 if (ulen < sizeof(*uh))
462 if (ulen < skb->len) {
463 if (pskb_trim_rcsum(skb, ulen))
465 saddr = &ipv6_hdr(skb)->saddr;
466 daddr = &ipv6_hdr(skb)->daddr;
471 if (udp6_csum_init(skb, uh, proto))
474 net = dev_net(skb->dev);
476 * Multicast receive code
478 if (ipv6_addr_is_multicast(daddr))
479 return __udp6_lib_mcast_deliver(net, skb,
480 saddr, daddr, udptable);
485 * check socket cache ... must talk to Alan about his plans
486 * for sock caches... i'll skip this for now.
488 sk = __udp6_lib_lookup(net, saddr, uh->source,
489 daddr, uh->dest, inet6_iif(skb), udptable);
492 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
495 if (udp_lib_checksum_complete(skb))
497 UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE);
499 icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
507 bh_lock_sock_nested(sk);
508 if (!sock_owned_by_user(sk))
509 udpv6_queue_rcv_skb(sk, skb);
511 sk_add_backlog(sk, skb);
517 LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
518 proto == IPPROTO_UDPLITE ? "-Lite" : "",
522 UDP6_INC_STATS_BH(UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
527 static __inline__ int udpv6_rcv(struct sk_buff *skb)
529 return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP);
533 * Throw away all pending data and cancel the corking. Socket is locked.
535 static void udp_v6_flush_pending_frames(struct sock *sk)
537 struct udp_sock *up = udp_sk(sk);
539 if (up->pending == AF_INET)
540 udp_flush_pending_frames(sk);
541 else if (up->pending) {
544 ip6_flush_pending_frames(sk);
552 static int udp_v6_push_pending_frames(struct sock *sk)
556 struct udp_sock *up = udp_sk(sk);
557 struct inet_sock *inet = inet_sk(sk);
558 struct flowi *fl = &inet->cork.fl;
560 int is_udplite = IS_UDPLITE(sk);
563 /* Grab the skbuff where UDP header space exists. */
564 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
568 * Create a UDP header
571 uh->source = fl->fl_ip_sport;
572 uh->dest = fl->fl_ip_dport;
573 uh->len = htons(up->len);
577 csum = udplite_csum_outgoing(sk, skb);
579 csum = udp_csum_outgoing(sk, skb);
581 /* add protocol-dependent pseudo-header */
582 uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst,
583 up->len, fl->proto, csum );
585 uh->check = CSUM_MANGLED_0;
587 err = ip6_push_pending_frames(sk);
592 UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite);
596 int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
597 struct msghdr *msg, size_t len)
599 struct ipv6_txoptions opt_space;
600 struct udp_sock *up = udp_sk(sk);
601 struct inet_sock *inet = inet_sk(sk);
602 struct ipv6_pinfo *np = inet6_sk(sk);
603 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
604 struct in6_addr *daddr, *final_p = NULL, final;
605 struct ipv6_txoptions *opt = NULL;
606 struct ip6_flowlabel *flowlabel = NULL;
608 struct dst_entry *dst;
609 int addr_len = msg->msg_namelen;
613 int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
616 int is_udplite = IS_UDPLITE(sk);
617 int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
619 /* destination address check */
621 if (addr_len < offsetof(struct sockaddr, sa_data))
624 switch (sin6->sin6_family) {
626 if (addr_len < SIN6_LEN_RFC2133)
628 daddr = &sin6->sin6_addr;
633 msg->msg_name = sin6 = NULL;
634 msg->msg_namelen = addr_len = 0;
640 } else if (!up->pending) {
641 if (sk->sk_state != TCP_ESTABLISHED)
642 return -EDESTADDRREQ;
648 if (ipv6_addr_v4mapped(daddr)) {
649 struct sockaddr_in sin;
650 sin.sin_family = AF_INET;
651 sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;
652 sin.sin_addr.s_addr = daddr->s6_addr32[3];
653 msg->msg_name = &sin;
654 msg->msg_namelen = sizeof(sin);
656 if (__ipv6_only_sock(sk))
658 return udp_sendmsg(iocb, sk, msg, len);
662 if (up->pending == AF_INET)
663 return udp_sendmsg(iocb, sk, msg, len);
665 /* Rough check on arithmetic overflow,
666 better check is made in ip6_append_data().
668 if (len > INT_MAX - sizeof(struct udphdr))
673 * There are pending frames.
674 * The socket lock must be held while it's corked.
677 if (likely(up->pending)) {
678 if (unlikely(up->pending != AF_INET6)) {
680 return -EAFNOSUPPORT;
687 ulen += sizeof(struct udphdr);
689 memset(&fl, 0, sizeof(fl));
692 if (sin6->sin6_port == 0)
695 fl.fl_ip_dport = sin6->sin6_port;
696 daddr = &sin6->sin6_addr;
699 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
700 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
701 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
702 if (flowlabel == NULL)
704 daddr = &flowlabel->dst;
709 * Otherwise it will be difficult to maintain
712 if (sk->sk_state == TCP_ESTABLISHED &&
713 ipv6_addr_equal(daddr, &np->daddr))
716 if (addr_len >= sizeof(struct sockaddr_in6) &&
717 sin6->sin6_scope_id &&
718 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
719 fl.oif = sin6->sin6_scope_id;
721 if (sk->sk_state != TCP_ESTABLISHED)
722 return -EDESTADDRREQ;
724 fl.fl_ip_dport = inet->dport;
726 fl.fl6_flowlabel = np->flow_label;
731 fl.oif = sk->sk_bound_dev_if;
733 if (msg->msg_controllen) {
735 memset(opt, 0, sizeof(struct ipv6_txoptions));
736 opt->tot_len = sizeof(*opt);
738 err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass);
740 fl6_sock_release(flowlabel);
743 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
744 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
745 if (flowlabel == NULL)
748 if (!(opt->opt_nflen|opt->opt_flen))
755 opt = fl6_merge_options(&opt_space, flowlabel, opt);
756 opt = ipv6_fixup_options(&opt_space, opt);
758 fl.proto = sk->sk_protocol;
759 if (!ipv6_addr_any(daddr))
760 ipv6_addr_copy(&fl.fl6_dst, daddr);
762 fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
763 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
764 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
765 fl.fl_ip_sport = inet->sport;
767 /* merge ip6_build_xmit from ip6_output */
768 if (opt && opt->srcrt) {
769 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
770 ipv6_addr_copy(&final, &fl.fl6_dst);
771 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
776 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
777 fl.oif = np->mcast_oif;
781 security_sk_classify_flow(sk, &fl);
783 err = ip6_sk_dst_lookup(sk, &dst, &fl);
787 ipv6_addr_copy(&fl.fl6_dst, final_p);
789 if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) {
791 err = ip6_dst_blackhole(sk, &dst, &fl);
797 if (ipv6_addr_is_multicast(&fl.fl6_dst))
798 hlimit = np->mcast_hops;
800 hlimit = np->hop_limit;
802 hlimit = ip6_dst_hoplimit(dst);
811 if (msg->msg_flags&MSG_CONFIRM)
816 if (unlikely(up->pending)) {
817 /* The socket is already corked while preparing it. */
818 /* ... which is an evident application bug. --ANK */
821 LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
826 up->pending = AF_INET6;
830 getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
831 err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,
832 sizeof(struct udphdr), hlimit, tclass, opt, &fl,
833 (struct rt6_info*)dst,
834 corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
836 udp_v6_flush_pending_frames(sk);
838 err = udp_v6_push_pending_frames(sk);
839 else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
844 ip6_dst_store(sk, dst,
845 ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
847 #ifdef CONFIG_IPV6_SUBTREES
848 ipv6_addr_equal(&fl.fl6_src, &np->saddr) ?
859 err = np->recverr ? net_xmit_errno(err) : 0;
863 fl6_sock_release(flowlabel);
867 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
868 * ENOBUFS might not be good (it's not tunable per se), but otherwise
869 * we don't have a good statistic (IpOutDiscards but it can be too many
870 * things). We could add another new stat but at least for now that
871 * seems like overkill.
873 if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
874 UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite);
880 if (!(msg->msg_flags&MSG_PROBE) || len)
881 goto back_from_confirm;
886 void udpv6_destroy_sock(struct sock *sk)
889 udp_v6_flush_pending_frames(sk);
892 inet6_destroy_sock(sk);
896 * Socket option code for UDP
898 int udpv6_setsockopt(struct sock *sk, int level, int optname,
899 char __user *optval, int optlen)
901 if (level == SOL_UDP || level == SOL_UDPLITE)
902 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
903 udp_v6_push_pending_frames);
904 return ipv6_setsockopt(sk, level, optname, optval, optlen);
908 int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
909 char __user *optval, int optlen)
911 if (level == SOL_UDP || level == SOL_UDPLITE)
912 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
913 udp_v6_push_pending_frames);
914 return compat_ipv6_setsockopt(sk, level, optname, optval, optlen);
918 int udpv6_getsockopt(struct sock *sk, int level, int optname,
919 char __user *optval, int __user *optlen)
921 if (level == SOL_UDP || level == SOL_UDPLITE)
922 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
923 return ipv6_getsockopt(sk, level, optname, optval, optlen);
927 int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
928 char __user *optval, int __user *optlen)
930 if (level == SOL_UDP || level == SOL_UDPLITE)
931 return udp_lib_getsockopt(sk, level, optname, optval, optlen);
932 return compat_ipv6_getsockopt(sk, level, optname, optval, optlen);
936 static struct inet6_protocol udpv6_protocol = {
937 .handler = udpv6_rcv,
938 .err_handler = udpv6_err,
939 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
942 /* ------------------------------------------------------------------------ */
943 #ifdef CONFIG_PROC_FS
945 static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket)
947 struct inet_sock *inet = inet_sk(sp);
948 struct ipv6_pinfo *np = inet6_sk(sp);
949 struct in6_addr *dest, *src;
953 src = &np->rcv_saddr;
954 destp = ntohs(inet->dport);
955 srcp = ntohs(inet->sport);
957 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
958 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
960 src->s6_addr32[0], src->s6_addr32[1],
961 src->s6_addr32[2], src->s6_addr32[3], srcp,
962 dest->s6_addr32[0], dest->s6_addr32[1],
963 dest->s6_addr32[2], dest->s6_addr32[3], destp,
965 atomic_read(&sp->sk_wmem_alloc),
966 atomic_read(&sp->sk_rmem_alloc),
970 atomic_read(&sp->sk_refcnt), sp);
973 int udp6_seq_show(struct seq_file *seq, void *v)
975 if (v == SEQ_START_TOKEN)
980 "st tx_queue rx_queue tr tm->when retrnsmt"
981 " uid timeout inode\n");
983 udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket);
987 static struct udp_seq_afinfo udp6_seq_afinfo = {
990 .hashtable = udp_hash,
992 .owner = THIS_MODULE,
995 .show = udp6_seq_show,
999 int udp6_proc_init(struct net *net)
1001 return udp_proc_register(net, &udp6_seq_afinfo);
1004 void udp6_proc_exit(struct net *net) {
1005 udp_proc_unregister(net, &udp6_seq_afinfo);
1007 #endif /* CONFIG_PROC_FS */
1009 /* ------------------------------------------------------------------------ */
1011 struct proto udpv6_prot = {
1013 .owner = THIS_MODULE,
1014 .close = udp_lib_close,
1015 .connect = ip6_datagram_connect,
1016 .disconnect = udp_disconnect,
1018 .destroy = udpv6_destroy_sock,
1019 .setsockopt = udpv6_setsockopt,
1020 .getsockopt = udpv6_getsockopt,
1021 .sendmsg = udpv6_sendmsg,
1022 .recvmsg = udpv6_recvmsg,
1023 .backlog_rcv = udpv6_queue_rcv_skb,
1024 .hash = udp_lib_hash,
1025 .unhash = udp_lib_unhash,
1026 .get_port = udp_v6_get_port,
1027 .memory_allocated = &udp_memory_allocated,
1028 .sysctl_mem = sysctl_udp_mem,
1029 .sysctl_wmem = &sysctl_udp_wmem_min,
1030 .sysctl_rmem = &sysctl_udp_rmem_min,
1031 .obj_size = sizeof(struct udp6_sock),
1032 .h.udp_hash = udp_hash,
1033 #ifdef CONFIG_COMPAT
1034 .compat_setsockopt = compat_udpv6_setsockopt,
1035 .compat_getsockopt = compat_udpv6_getsockopt,
1039 static struct inet_protosw udpv6_protosw = {
1041 .protocol = IPPROTO_UDP,
1042 .prot = &udpv6_prot,
1043 .ops = &inet6_dgram_ops,
1045 .no_check = UDP_CSUM_DEFAULT,
1046 .flags = INET_PROTOSW_PERMANENT,
1050 int __init udpv6_init(void)
1054 ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP);
1058 ret = inet6_register_protosw(&udpv6_protosw);
1060 goto out_udpv6_protocol;
1065 inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
1069 void udpv6_exit(void)
1071 inet6_unregister_protosw(&udpv6_protosw);
1072 inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);