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/sched.h>
31 #include <linux/net.h>
32 #include <linux/in6.h>
33 #include <linux/netdevice.h>
34 #include <linux/if_arp.h>
35 #include <linux/ipv6.h>
36 #include <linux/icmpv6.h>
37 #include <linux/init.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;
56 static inline int udp_v6_get_port(struct sock *sk, unsigned short snum)
58 return udp_get_port(sk, snum, ipv6_rcv_saddr_equal);
61 static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport,
62 struct in6_addr *daddr, __be16 dport,
63 int dif, struct hlist_head udptable[])
65 struct sock *sk, *result = NULL;
66 struct hlist_node *node;
67 unsigned short hnum = ntohs(dport);
70 read_lock(&udp_hash_lock);
71 sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
72 struct inet_sock *inet = inet_sk(sk);
74 if (inet->num == hnum && sk->sk_family == PF_INET6) {
75 struct ipv6_pinfo *np = inet6_sk(sk);
78 if (inet->dport != sport)
82 if (!ipv6_addr_any(&np->rcv_saddr)) {
83 if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
87 if (!ipv6_addr_any(&np->daddr)) {
88 if (!ipv6_addr_equal(&np->daddr, saddr))
92 if (sk->sk_bound_dev_if) {
93 if (sk->sk_bound_dev_if != dif)
100 } else if(score > badness) {
108 read_unlock(&udp_hash_lock);
113 * This should be easy, if there is something there we
114 * return it, otherwise we block.
117 int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
118 struct msghdr *msg, size_t len,
119 int noblock, int flags, int *addr_len)
121 struct ipv6_pinfo *np = inet6_sk(sk);
122 struct inet_sock *inet = inet_sk(sk);
125 int err, copy_only, 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 copied = skb->len - sizeof(struct udphdr);
141 msg->msg_flags |= MSG_TRUNC;
145 * Decide whether to checksum and/or copy data.
147 copy_only = (skb->ip_summed==CHECKSUM_UNNECESSARY);
149 if (is_udplite || (!copy_only && msg->msg_flags&MSG_TRUNC)) {
150 if (__udp_lib_checksum_complete(skb))
156 err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
157 msg->msg_iov, copied );
159 err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
166 sock_recv_timestamp(msg, sk, skb);
168 /* Copy the address. */
170 struct sockaddr_in6 *sin6;
172 sin6 = (struct sockaddr_in6 *) msg->msg_name;
173 sin6->sin6_family = AF_INET6;
174 sin6->sin6_port = skb->h.uh->source;
175 sin6->sin6_flowinfo = 0;
176 sin6->sin6_scope_id = 0;
178 if (skb->protocol == htons(ETH_P_IP))
179 ipv6_addr_set(&sin6->sin6_addr, 0, 0,
180 htonl(0xffff), skb->nh.iph->saddr);
182 ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr);
183 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
184 sin6->sin6_scope_id = IP6CB(skb)->iif;
188 if (skb->protocol == htons(ETH_P_IP)) {
189 if (inet->cmsg_flags)
190 ip_cmsg_recv(msg, skb);
193 datagram_recv_ctl(sk, msg, skb);
197 if (flags & MSG_TRUNC)
198 err = skb->len - sizeof(struct udphdr);
201 skb_free_datagram(sk, skb);
206 skb_kill_datagram(sk, skb, flags);
208 if (flags & MSG_DONTWAIT) {
209 UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite);
215 void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
216 int type, int code, int offset, __be32 info,
217 struct hlist_head udptable[] )
219 struct ipv6_pinfo *np;
220 struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
221 struct in6_addr *saddr = &hdr->saddr;
222 struct in6_addr *daddr = &hdr->daddr;
223 struct udphdr *uh = (struct udphdr*)(skb->data+offset);
227 sk = __udp6_lib_lookup(daddr, uh->dest,
228 saddr, uh->source, inet6_iif(skb), udptable);
234 if (!icmpv6_err_convert(type, code, &err) && !np->recverr)
237 if (sk->sk_state != TCP_ESTABLISHED && !np->recverr)
241 ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1));
244 sk->sk_error_report(sk);
249 static __inline__ void udpv6_err(struct sk_buff *skb,
250 struct inet6_skb_parm *opt, int type,
251 int code, int offset, __u32 info )
253 return __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash);
256 int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
258 struct udp_sock *up = udp_sk(sk);
261 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
265 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
267 if ((up->pcflag & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) {
269 if (up->pcrlen == 0) { /* full coverage was set */
270 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage"
271 " %d while full coverage %d requested\n",
272 UDP_SKB_CB(skb)->cscov, skb->len);
275 if (UDP_SKB_CB(skb)->cscov < up->pcrlen) {
276 LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d "
277 "too small, need min %d\n",
278 UDP_SKB_CB(skb)->cscov, up->pcrlen);
283 if (udp_lib_checksum_complete(skb))
286 if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
287 /* Note that an ENOMEM error is charged twice */
289 UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, up->pcflag);
292 UDP6_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag);
295 UDP6_INC_STATS_BH(UDP_MIB_INERRORS, up->pcflag);
300 static struct sock *udp_v6_mcast_next(struct sock *sk,
301 u16 loc_port, struct in6_addr *loc_addr,
302 u16 rmt_port, struct in6_addr *rmt_addr,
305 struct hlist_node *node;
307 unsigned short num = ntohs(loc_port);
309 sk_for_each_from(s, node) {
310 struct inet_sock *inet = inet_sk(s);
312 if (inet->num == num && s->sk_family == PF_INET6) {
313 struct ipv6_pinfo *np = inet6_sk(s);
315 if (inet->dport != rmt_port)
318 if (!ipv6_addr_any(&np->daddr) &&
319 !ipv6_addr_equal(&np->daddr, rmt_addr))
322 if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif)
325 if (!ipv6_addr_any(&np->rcv_saddr)) {
326 if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr))
329 if(!inet6_mc_check(s, loc_addr, rmt_addr))
338 * Note: called only from the BH handler context,
339 * so we don't need to lock the hashes.
341 static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr,
342 struct in6_addr *daddr, struct hlist_head udptable[])
344 struct sock *sk, *sk2;
345 const struct udphdr *uh = skb->h.uh;
348 read_lock(&udp_hash_lock);
349 sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]);
350 dif = inet6_iif(skb);
351 sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
358 while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr,
359 uh->source, saddr, dif))) {
360 struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC);
362 udpv6_queue_rcv_skb(sk2, buff);
364 udpv6_queue_rcv_skb(sk, skb);
366 read_unlock(&udp_hash_lock);
370 static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh)
373 if (uh->check == 0) {
374 /* RFC 2460 section 8.1 says that we SHOULD log
375 this error. Well, it is reasonable.
377 LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
380 if (skb->ip_summed == CHECKSUM_COMPLETE &&
381 !csum_ipv6_magic(&skb->nh.ipv6h->saddr, &skb->nh.ipv6h->daddr,
382 skb->len, IPPROTO_UDP, skb->csum ))
383 skb->ip_summed = CHECKSUM_UNNECESSARY;
385 if (skb->ip_summed != CHECKSUM_UNNECESSARY)
386 skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
387 &skb->nh.ipv6h->daddr,
388 skb->len, IPPROTO_UDP, 0);
390 return (UDP_SKB_CB(skb)->partial_cov = 0);
393 int __udp6_lib_rcv(struct sk_buff **pskb, struct hlist_head udptable[],
396 struct sk_buff *skb = *pskb;
399 struct net_device *dev = skb->dev;
400 struct in6_addr *saddr, *daddr;
403 if (!pskb_may_pull(skb, sizeof(struct udphdr)))
406 saddr = &skb->nh.ipv6h->saddr;
407 daddr = &skb->nh.ipv6h->daddr;
410 ulen = ntohs(uh->len);
414 if(! is_udplite ) { /* UDP validates ulen. */
416 /* Check for jumbo payload */
420 if (ulen < sizeof(*uh))
423 if (ulen < skb->len) {
424 if (pskb_trim_rcsum(skb, ulen))
426 saddr = &skb->nh.ipv6h->saddr;
427 daddr = &skb->nh.ipv6h->daddr;
431 if (udp6_csum_init(skb, uh))
434 } else { /* UDP-Lite validates cscov. */
435 if (udplite6_csum_init(skb, uh))
440 * Multicast receive code
442 if (ipv6_addr_is_multicast(daddr))
443 return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable);
448 * check socket cache ... must talk to Alan about his plans
449 * for sock caches... i'll skip this for now.
451 sk = __udp6_lib_lookup(saddr, uh->source,
452 daddr, uh->dest, inet6_iif(skb), udptable);
455 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
458 if (udp_lib_checksum_complete(skb))
460 UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, is_udplite);
462 icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev);
470 udpv6_queue_rcv_skb(sk, skb);
475 LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n",
476 is_udplite? "-Lite" : "", ulen, skb->len);
479 UDP6_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite);
484 static __inline__ int udpv6_rcv(struct sk_buff **pskb)
486 return __udp6_lib_rcv(pskb, udp_hash, 0);
490 * Throw away all pending data and cancel the corking. Socket is locked.
492 static void udp_v6_flush_pending_frames(struct sock *sk)
494 struct udp_sock *up = udp_sk(sk);
499 ip6_flush_pending_frames(sk);
507 static int udp_v6_push_pending_frames(struct sock *sk, struct udp_sock *up)
511 struct inet_sock *inet = inet_sk(sk);
512 struct flowi *fl = &inet->cork.fl;
516 /* Grab the skbuff where UDP header space exists. */
517 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
521 * Create a UDP header
524 uh->source = fl->fl_ip_sport;
525 uh->dest = fl->fl_ip_dport;
526 uh->len = htons(up->len);
530 csum = udplite_csum_outgoing(sk, skb);
532 csum = udp_csum_outgoing(sk, skb);
534 /* add protocol-dependent pseudo-header */
535 uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst,
536 up->len, fl->proto, csum );
540 err = ip6_push_pending_frames(sk);
547 int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
548 struct msghdr *msg, size_t len)
550 struct ipv6_txoptions opt_space;
551 struct udp_sock *up = udp_sk(sk);
552 struct inet_sock *inet = inet_sk(sk);
553 struct ipv6_pinfo *np = inet6_sk(sk);
554 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
555 struct in6_addr *daddr, *final_p = NULL, final;
556 struct ipv6_txoptions *opt = NULL;
557 struct ip6_flowlabel *flowlabel = NULL;
559 struct dst_entry *dst;
560 int addr_len = msg->msg_namelen;
564 int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
567 int is_udplite = up->pcflag;
568 int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
570 /* destination address check */
572 if (addr_len < offsetof(struct sockaddr, sa_data))
575 switch (sin6->sin6_family) {
577 if (addr_len < SIN6_LEN_RFC2133)
579 daddr = &sin6->sin6_addr;
584 msg->msg_name = sin6 = NULL;
585 msg->msg_namelen = addr_len = 0;
591 } else if (!up->pending) {
592 if (sk->sk_state != TCP_ESTABLISHED)
593 return -EDESTADDRREQ;
599 if (ipv6_addr_type(daddr) == IPV6_ADDR_MAPPED) {
600 struct sockaddr_in sin;
601 sin.sin_family = AF_INET;
602 sin.sin_port = sin6 ? sin6->sin6_port : inet->dport;
603 sin.sin_addr.s_addr = daddr->s6_addr32[3];
604 msg->msg_name = &sin;
605 msg->msg_namelen = sizeof(sin);
607 if (__ipv6_only_sock(sk))
609 return udp_sendmsg(iocb, sk, msg, len);
613 if (up->pending == AF_INET)
614 return udp_sendmsg(iocb, sk, msg, len);
616 /* Rough check on arithmetic overflow,
617 better check is made in ip6_build_xmit
619 if (len > INT_MAX - sizeof(struct udphdr))
624 * There are pending frames.
625 * The socket lock must be held while it's corked.
628 if (likely(up->pending)) {
629 if (unlikely(up->pending != AF_INET6)) {
631 return -EAFNOSUPPORT;
638 ulen += sizeof(struct udphdr);
640 memset(&fl, 0, sizeof(fl));
643 if (sin6->sin6_port == 0)
646 fl.fl_ip_dport = sin6->sin6_port;
647 daddr = &sin6->sin6_addr;
650 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
651 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
652 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
653 if (flowlabel == NULL)
655 daddr = &flowlabel->dst;
660 * Otherwise it will be difficult to maintain
663 if (sk->sk_state == TCP_ESTABLISHED &&
664 ipv6_addr_equal(daddr, &np->daddr))
667 if (addr_len >= sizeof(struct sockaddr_in6) &&
668 sin6->sin6_scope_id &&
669 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
670 fl.oif = sin6->sin6_scope_id;
672 if (sk->sk_state != TCP_ESTABLISHED)
673 return -EDESTADDRREQ;
675 fl.fl_ip_dport = inet->dport;
677 fl.fl6_flowlabel = np->flow_label;
682 fl.oif = sk->sk_bound_dev_if;
684 if (msg->msg_controllen) {
686 memset(opt, 0, sizeof(struct ipv6_txoptions));
687 opt->tot_len = sizeof(*opt);
689 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
691 fl6_sock_release(flowlabel);
694 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
695 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
696 if (flowlabel == NULL)
699 if (!(opt->opt_nflen|opt->opt_flen))
706 opt = fl6_merge_options(&opt_space, flowlabel, opt);
707 opt = ipv6_fixup_options(&opt_space, opt);
709 fl.proto = sk->sk_protocol;
710 ipv6_addr_copy(&fl.fl6_dst, daddr);
711 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
712 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
713 fl.fl_ip_sport = inet->sport;
715 /* merge ip6_build_xmit from ip6_output */
716 if (opt && opt->srcrt) {
717 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
718 ipv6_addr_copy(&final, &fl.fl6_dst);
719 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
724 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) {
725 fl.oif = np->mcast_oif;
729 security_sk_classify_flow(sk, &fl);
731 err = ip6_sk_dst_lookup(sk, &dst, &fl);
735 ipv6_addr_copy(&fl.fl6_dst, final_p);
737 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
741 if (ipv6_addr_is_multicast(&fl.fl6_dst))
742 hlimit = np->mcast_hops;
744 hlimit = np->hop_limit;
746 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
748 hlimit = ipv6_get_hoplimit(dst->dev);
757 if (msg->msg_flags&MSG_CONFIRM)
762 if (unlikely(up->pending)) {
763 /* The socket is already corked while preparing it. */
764 /* ... which is an evident application bug. --ANK */
767 LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
772 up->pending = AF_INET6;
776 getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
777 err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,
778 sizeof(struct udphdr), hlimit, tclass, opt, &fl,
779 (struct rt6_info*)dst,
780 corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
782 udp_v6_flush_pending_frames(sk);
784 err = udp_v6_push_pending_frames(sk, up);
785 else if (unlikely(skb_queue_empty(&sk->sk_write_queue)))
790 ip6_dst_store(sk, dst,
791 ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ?
793 #ifdef CONFIG_IPV6_SUBTREES
794 ipv6_addr_equal(&fl.fl6_src, &np->saddr) ?
804 err = np->recverr ? net_xmit_errno(err) : 0;
807 fl6_sock_release(flowlabel);
809 UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite);
813 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
814 * ENOBUFS might not be good (it's not tunable per se), but otherwise
815 * we don't have a good statistic (IpOutDiscards but it can be too many
816 * things). We could add another new stat but at least for now that
817 * seems like overkill.
819 if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
820 UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite);
826 if (!(msg->msg_flags&MSG_PROBE) || len)
827 goto back_from_confirm;
832 int udpv6_destroy_sock(struct sock *sk)
835 udp_v6_flush_pending_frames(sk);
838 inet6_destroy_sock(sk);
844 * Socket option code for UDP
846 static int do_udpv6_setsockopt(struct sock *sk, int level, int optname,
847 char __user *optval, int optlen)
849 struct udp_sock *up = udp_sk(sk);
853 if(optlen<sizeof(int))
856 if (get_user(val, (int __user *)optval))
866 udp_v6_push_pending_frames(sk, up);
873 up->encap_type = val;
881 case UDPLITE_SEND_CSCOV:
882 if (!up->pcflag) /* Disable the option on UDP sockets */
884 if (val != 0 && val < 8) /* Illegal coverage: use default (8) */
887 up->pcflag |= UDPLITE_SEND_CC;
890 case UDPLITE_RECV_CSCOV:
891 if (!up->pcflag) /* Disable the option on UDP sockets */
893 if (val != 0 && val < 8) /* Avoid silly minimal values. */
896 up->pcflag |= UDPLITE_RECV_CC;
907 int udpv6_setsockopt(struct sock *sk, int level, int optname,
908 char __user *optval, int optlen)
910 if (level == SOL_UDP || level == SOL_UDPLITE)
911 return do_udpv6_setsockopt(sk, level, optname, optval, optlen);
912 return ipv6_setsockopt(sk, level, optname, optval, optlen);
916 int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
917 char __user *optval, int optlen)
919 if (level == SOL_UDP || level == SOL_UDPLITE)
920 return do_udpv6_setsockopt(sk, level, optname, optval, optlen);
921 return compat_ipv6_setsockopt(sk, level, optname, optval, optlen);
925 static int do_udpv6_getsockopt(struct sock *sk, int level, int optname,
926 char __user *optval, int __user *optlen)
928 struct udp_sock *up = udp_sk(sk);
931 if(get_user(len,optlen))
934 len = min_t(unsigned int, len, sizeof(int));
945 val = up->encap_type;
948 case UDPLITE_SEND_CSCOV:
952 case UDPLITE_RECV_CSCOV:
960 if(put_user(len, optlen))
962 if(copy_to_user(optval, &val,len))
967 int udpv6_getsockopt(struct sock *sk, int level, int optname,
968 char __user *optval, int __user *optlen)
970 if (level == SOL_UDP || level == SOL_UDPLITE)
971 return do_udpv6_getsockopt(sk, level, optname, optval, optlen);
972 return ipv6_getsockopt(sk, level, optname, optval, optlen);
976 int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
977 char __user *optval, int __user *optlen)
979 if (level == SOL_UDP || level == SOL_UDPLITE)
980 return do_udpv6_getsockopt(sk, level, optname, optval, optlen);
981 return compat_ipv6_getsockopt(sk, level, optname, optval, optlen);
985 static struct inet6_protocol udpv6_protocol = {
986 .handler = udpv6_rcv,
987 .err_handler = udpv6_err,
988 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
991 /* ------------------------------------------------------------------------ */
992 #ifdef CONFIG_PROC_FS
994 static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket)
996 struct inet_sock *inet = inet_sk(sp);
997 struct ipv6_pinfo *np = inet6_sk(sp);
998 struct in6_addr *dest, *src;
1002 src = &np->rcv_saddr;
1003 destp = ntohs(inet->dport);
1004 srcp = ntohs(inet->sport);
1006 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1007 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
1009 src->s6_addr32[0], src->s6_addr32[1],
1010 src->s6_addr32[2], src->s6_addr32[3], srcp,
1011 dest->s6_addr32[0], dest->s6_addr32[1],
1012 dest->s6_addr32[2], dest->s6_addr32[3], destp,
1014 atomic_read(&sp->sk_wmem_alloc),
1015 atomic_read(&sp->sk_rmem_alloc),
1019 atomic_read(&sp->sk_refcnt), sp);
1022 int udp6_seq_show(struct seq_file *seq, void *v)
1024 if (v == SEQ_START_TOKEN)
1029 "st tx_queue rx_queue tr tm->when retrnsmt"
1030 " uid timeout inode\n");
1032 udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket);
1036 static struct file_operations udp6_seq_fops;
1037 static struct udp_seq_afinfo udp6_seq_afinfo = {
1038 .owner = THIS_MODULE,
1041 .hashtable = udp_hash,
1042 .seq_show = udp6_seq_show,
1043 .seq_fops = &udp6_seq_fops,
1046 int __init udp6_proc_init(void)
1048 return udp_proc_register(&udp6_seq_afinfo);
1051 void udp6_proc_exit(void) {
1052 udp_proc_unregister(&udp6_seq_afinfo);
1054 #endif /* CONFIG_PROC_FS */
1056 /* ------------------------------------------------------------------------ */
1058 struct proto udpv6_prot = {
1060 .owner = THIS_MODULE,
1061 .close = udp_lib_close,
1062 .connect = ip6_datagram_connect,
1063 .disconnect = udp_disconnect,
1065 .destroy = udpv6_destroy_sock,
1066 .setsockopt = udpv6_setsockopt,
1067 .getsockopt = udpv6_getsockopt,
1068 .sendmsg = udpv6_sendmsg,
1069 .recvmsg = udpv6_recvmsg,
1070 .backlog_rcv = udpv6_queue_rcv_skb,
1071 .hash = udp_lib_hash,
1072 .unhash = udp_lib_unhash,
1073 .get_port = udp_v6_get_port,
1074 .obj_size = sizeof(struct udp6_sock),
1075 #ifdef CONFIG_COMPAT
1076 .compat_setsockopt = compat_udpv6_setsockopt,
1077 .compat_getsockopt = compat_udpv6_getsockopt,
1081 static struct inet_protosw udpv6_protosw = {
1083 .protocol = IPPROTO_UDP,
1084 .prot = &udpv6_prot,
1085 .ops = &inet6_dgram_ops,
1087 .no_check = UDP_CSUM_DEFAULT,
1088 .flags = INET_PROTOSW_PERMANENT,
1092 void __init udpv6_init(void)
1094 if (inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP) < 0)
1095 printk(KERN_ERR "udpv6_init: Could not register protocol\n");
1096 inet6_register_protosw(&udpv6_protosw);