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
->ip_summed
== CHECKSUM_UNNECESSARY
)
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
= skb
->h
.uh
->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
, &skb
->nh
.ipv6h
->saddr
);
184 if (ipv6_addr_type(&sin6
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
185 sin6
->sin6_scope_id
= IP6CB(skb
)->iif
;
189 if (skb
->protocol
== htons(ETH_P_IP
)) {
190 if (inet
->cmsg_flags
)
191 ip_cmsg_recv(msg
, skb
);
194 datagram_recv_ctl(sk
, msg
, skb
);
198 if (flags
& MSG_TRUNC
)
202 skb_free_datagram(sk
, skb
);
207 skb_kill_datagram(sk
, skb
, flags
);
209 if (flags
& MSG_DONTWAIT
) {
210 UDP6_INC_STATS_USER(UDP_MIB_INERRORS
, is_udplite
);
216 void __udp6_lib_err(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
217 int type
, int code
, int offset
, __be32 info
,
218 struct hlist_head udptable
[] )
220 struct ipv6_pinfo
*np
;
221 struct ipv6hdr
*hdr
= (struct ipv6hdr
*)skb
->data
;
222 struct in6_addr
*saddr
= &hdr
->saddr
;
223 struct in6_addr
*daddr
= &hdr
->daddr
;
224 struct udphdr
*uh
= (struct udphdr
*)(skb
->data
+offset
);
228 sk
= __udp6_lib_lookup(daddr
, uh
->dest
,
229 saddr
, uh
->source
, inet6_iif(skb
), udptable
);
235 if (!icmpv6_err_convert(type
, code
, &err
) && !np
->recverr
)
238 if (sk
->sk_state
!= TCP_ESTABLISHED
&& !np
->recverr
)
242 ipv6_icmp_error(sk
, skb
, err
, uh
->dest
, ntohl(info
), (u8
*)(uh
+1));
245 sk
->sk_error_report(sk
);
250 static __inline__
void udpv6_err(struct sk_buff
*skb
,
251 struct inet6_skb_parm
*opt
, int type
,
252 int code
, int offset
, __be32 info
)
254 return __udp6_lib_err(skb
, opt
, type
, code
, offset
, info
, udp_hash
);
257 int udpv6_queue_rcv_skb(struct sock
* sk
, struct sk_buff
*skb
)
259 struct udp_sock
*up
= udp_sk(sk
);
262 if (!xfrm6_policy_check(sk
, XFRM_POLICY_IN
, skb
))
266 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
268 if ((up
->pcflag
& UDPLITE_RECV_CC
) && UDP_SKB_CB(skb
)->partial_cov
) {
270 if (up
->pcrlen
== 0) { /* full coverage was set */
271 LIMIT_NETDEBUG(KERN_WARNING
"UDPLITE6: partial coverage"
272 " %d while full coverage %d requested\n",
273 UDP_SKB_CB(skb
)->cscov
, skb
->len
);
276 if (UDP_SKB_CB(skb
)->cscov
< up
->pcrlen
) {
277 LIMIT_NETDEBUG(KERN_WARNING
"UDPLITE6: coverage %d "
278 "too small, need min %d\n",
279 UDP_SKB_CB(skb
)->cscov
, up
->pcrlen
);
285 if (udp_lib_checksum_complete(skb
))
289 if ((rc
= sock_queue_rcv_skb(sk
,skb
)) < 0) {
290 /* Note that an ENOMEM error is charged twice */
292 UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS
, up
->pcflag
);
295 UDP6_INC_STATS_BH(UDP_MIB_INDATAGRAMS
, up
->pcflag
);
298 UDP6_INC_STATS_BH(UDP_MIB_INERRORS
, up
->pcflag
);
303 static struct sock
*udp_v6_mcast_next(struct sock
*sk
,
304 __be16 loc_port
, struct in6_addr
*loc_addr
,
305 __be16 rmt_port
, struct in6_addr
*rmt_addr
,
308 struct hlist_node
*node
;
310 unsigned short num
= ntohs(loc_port
);
312 sk_for_each_from(s
, node
) {
313 struct inet_sock
*inet
= inet_sk(s
);
315 if (s
->sk_hash
== num
&& s
->sk_family
== PF_INET6
) {
316 struct ipv6_pinfo
*np
= inet6_sk(s
);
318 if (inet
->dport
!= rmt_port
)
321 if (!ipv6_addr_any(&np
->daddr
) &&
322 !ipv6_addr_equal(&np
->daddr
, rmt_addr
))
325 if (s
->sk_bound_dev_if
&& s
->sk_bound_dev_if
!= dif
)
328 if (!ipv6_addr_any(&np
->rcv_saddr
)) {
329 if (!ipv6_addr_equal(&np
->rcv_saddr
, loc_addr
))
332 if (!inet6_mc_check(s
, loc_addr
, rmt_addr
))
341 * Note: called only from the BH handler context,
342 * so we don't need to lock the hashes.
344 static int __udp6_lib_mcast_deliver(struct sk_buff
*skb
, struct in6_addr
*saddr
,
345 struct in6_addr
*daddr
, struct hlist_head udptable
[])
347 struct sock
*sk
, *sk2
;
348 const struct udphdr
*uh
= skb
->h
.uh
;
351 read_lock(&udp_hash_lock
);
352 sk
= sk_head(&udptable
[ntohs(uh
->dest
) & (UDP_HTABLE_SIZE
- 1)]);
353 dif
= inet6_iif(skb
);
354 sk
= udp_v6_mcast_next(sk
, uh
->dest
, daddr
, uh
->source
, saddr
, dif
);
361 while ((sk2
= udp_v6_mcast_next(sk_next(sk2
), uh
->dest
, daddr
,
362 uh
->source
, saddr
, dif
))) {
363 struct sk_buff
*buff
= skb_clone(skb
, GFP_ATOMIC
);
365 udpv6_queue_rcv_skb(sk2
, buff
);
367 udpv6_queue_rcv_skb(sk
, skb
);
369 read_unlock(&udp_hash_lock
);
373 static inline int udp6_csum_init(struct sk_buff
*skb
, struct udphdr
*uh
,
378 UDP_SKB_CB(skb
)->partial_cov
= 0;
379 UDP_SKB_CB(skb
)->cscov
= skb
->len
;
381 if (proto
== IPPROTO_UDPLITE
) {
382 err
= udplite_checksum_init(skb
, uh
);
387 if (uh
->check
== 0) {
388 /* RFC 2460 section 8.1 says that we SHOULD log
389 this error. Well, it is reasonable.
391 LIMIT_NETDEBUG(KERN_INFO
"IPv6: udp checksum is 0\n");
394 if (skb
->ip_summed
== CHECKSUM_COMPLETE
&&
395 !csum_ipv6_magic(&skb
->nh
.ipv6h
->saddr
, &skb
->nh
.ipv6h
->daddr
,
396 skb
->len
, proto
, skb
->csum
))
397 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
399 if (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)
400 skb
->csum
= ~csum_unfold(csum_ipv6_magic(&skb
->nh
.ipv6h
->saddr
,
401 &skb
->nh
.ipv6h
->daddr
,
402 skb
->len
, proto
, 0));
407 int __udp6_lib_rcv(struct sk_buff
**pskb
, struct hlist_head udptable
[],
410 struct sk_buff
*skb
= *pskb
;
413 struct net_device
*dev
= skb
->dev
;
414 struct in6_addr
*saddr
, *daddr
;
417 if (!pskb_may_pull(skb
, sizeof(struct udphdr
)))
420 saddr
= &skb
->nh
.ipv6h
->saddr
;
421 daddr
= &skb
->nh
.ipv6h
->daddr
;
424 ulen
= ntohs(uh
->len
);
428 if (proto
== IPPROTO_UDP
) {
429 /* UDP validates ulen. */
431 /* Check for jumbo payload */
435 if (ulen
< sizeof(*uh
))
438 if (ulen
< skb
->len
) {
439 if (pskb_trim_rcsum(skb
, ulen
))
441 saddr
= &skb
->nh
.ipv6h
->saddr
;
442 daddr
= &skb
->nh
.ipv6h
->daddr
;
447 if (udp6_csum_init(skb
, uh
, proto
))
451 * Multicast receive code
453 if (ipv6_addr_is_multicast(daddr
))
454 return __udp6_lib_mcast_deliver(skb
, saddr
, daddr
, udptable
);
459 * check socket cache ... must talk to Alan about his plans
460 * for sock caches... i'll skip this for now.
462 sk
= __udp6_lib_lookup(saddr
, uh
->source
,
463 daddr
, uh
->dest
, inet6_iif(skb
), udptable
);
466 if (!xfrm6_policy_check(NULL
, XFRM_POLICY_IN
, skb
))
469 if (udp_lib_checksum_complete(skb
))
471 UDP6_INC_STATS_BH(UDP_MIB_NOPORTS
, proto
== IPPROTO_UDPLITE
);
473 icmpv6_send(skb
, ICMPV6_DEST_UNREACH
, ICMPV6_PORT_UNREACH
, 0, dev
);
481 udpv6_queue_rcv_skb(sk
, skb
);
486 LIMIT_NETDEBUG(KERN_DEBUG
"UDP%sv6: short packet: %d/%u\n",
487 proto
== IPPROTO_UDPLITE
? "-Lite" : "",
491 UDP6_INC_STATS_BH(UDP_MIB_INERRORS
, proto
== IPPROTO_UDPLITE
);
496 static __inline__
int udpv6_rcv(struct sk_buff
**pskb
)
498 return __udp6_lib_rcv(pskb
, udp_hash
, IPPROTO_UDP
);
502 * Throw away all pending data and cancel the corking. Socket is locked.
504 static void udp_v6_flush_pending_frames(struct sock
*sk
)
506 struct udp_sock
*up
= udp_sk(sk
);
511 ip6_flush_pending_frames(sk
);
519 static int udp_v6_push_pending_frames(struct sock
*sk
)
523 struct udp_sock
*up
= udp_sk(sk
);
524 struct inet_sock
*inet
= inet_sk(sk
);
525 struct flowi
*fl
= &inet
->cork
.fl
;
529 /* Grab the skbuff where UDP header space exists. */
530 if ((skb
= skb_peek(&sk
->sk_write_queue
)) == NULL
)
534 * Create a UDP header
537 uh
->source
= fl
->fl_ip_sport
;
538 uh
->dest
= fl
->fl_ip_dport
;
539 uh
->len
= htons(up
->len
);
543 csum
= udplite_csum_outgoing(sk
, skb
);
545 csum
= udp_csum_outgoing(sk
, skb
);
547 /* add protocol-dependent pseudo-header */
548 uh
->check
= csum_ipv6_magic(&fl
->fl6_src
, &fl
->fl6_dst
,
549 up
->len
, fl
->proto
, csum
);
551 uh
->check
= CSUM_MANGLED_0
;
553 err
= ip6_push_pending_frames(sk
);
560 int udpv6_sendmsg(struct kiocb
*iocb
, struct sock
*sk
,
561 struct msghdr
*msg
, size_t len
)
563 struct ipv6_txoptions opt_space
;
564 struct udp_sock
*up
= udp_sk(sk
);
565 struct inet_sock
*inet
= inet_sk(sk
);
566 struct ipv6_pinfo
*np
= inet6_sk(sk
);
567 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) msg
->msg_name
;
568 struct in6_addr
*daddr
, *final_p
= NULL
, final
;
569 struct ipv6_txoptions
*opt
= NULL
;
570 struct ip6_flowlabel
*flowlabel
= NULL
;
572 struct dst_entry
*dst
;
573 int addr_len
= msg
->msg_namelen
;
577 int corkreq
= up
->corkflag
|| msg
->msg_flags
&MSG_MORE
;
580 int is_udplite
= up
->pcflag
;
581 int (*getfrag
)(void *, char *, int, int, int, struct sk_buff
*);
583 /* destination address check */
585 if (addr_len
< offsetof(struct sockaddr
, sa_data
))
588 switch (sin6
->sin6_family
) {
590 if (addr_len
< SIN6_LEN_RFC2133
)
592 daddr
= &sin6
->sin6_addr
;
597 msg
->msg_name
= sin6
= NULL
;
598 msg
->msg_namelen
= addr_len
= 0;
604 } else if (!up
->pending
) {
605 if (sk
->sk_state
!= TCP_ESTABLISHED
)
606 return -EDESTADDRREQ
;
612 if (ipv6_addr_type(daddr
) == IPV6_ADDR_MAPPED
) {
613 struct sockaddr_in sin
;
614 sin
.sin_family
= AF_INET
;
615 sin
.sin_port
= sin6
? sin6
->sin6_port
: inet
->dport
;
616 sin
.sin_addr
.s_addr
= daddr
->s6_addr32
[3];
617 msg
->msg_name
= &sin
;
618 msg
->msg_namelen
= sizeof(sin
);
620 if (__ipv6_only_sock(sk
))
622 return udp_sendmsg(iocb
, sk
, msg
, len
);
626 if (up
->pending
== AF_INET
)
627 return udp_sendmsg(iocb
, sk
, msg
, len
);
629 /* Rough check on arithmetic overflow,
630 better check is made in ip6_append_data().
632 if (len
> INT_MAX
- sizeof(struct udphdr
))
637 * There are pending frames.
638 * The socket lock must be held while it's corked.
641 if (likely(up
->pending
)) {
642 if (unlikely(up
->pending
!= AF_INET6
)) {
644 return -EAFNOSUPPORT
;
651 ulen
+= sizeof(struct udphdr
);
653 memset(&fl
, 0, sizeof(fl
));
656 if (sin6
->sin6_port
== 0)
659 fl
.fl_ip_dport
= sin6
->sin6_port
;
660 daddr
= &sin6
->sin6_addr
;
663 fl
.fl6_flowlabel
= sin6
->sin6_flowinfo
&IPV6_FLOWINFO_MASK
;
664 if (fl
.fl6_flowlabel
&IPV6_FLOWLABEL_MASK
) {
665 flowlabel
= fl6_sock_lookup(sk
, fl
.fl6_flowlabel
);
666 if (flowlabel
== NULL
)
668 daddr
= &flowlabel
->dst
;
673 * Otherwise it will be difficult to maintain
676 if (sk
->sk_state
== TCP_ESTABLISHED
&&
677 ipv6_addr_equal(daddr
, &np
->daddr
))
680 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
681 sin6
->sin6_scope_id
&&
682 ipv6_addr_type(daddr
)&IPV6_ADDR_LINKLOCAL
)
683 fl
.oif
= sin6
->sin6_scope_id
;
685 if (sk
->sk_state
!= TCP_ESTABLISHED
)
686 return -EDESTADDRREQ
;
688 fl
.fl_ip_dport
= inet
->dport
;
690 fl
.fl6_flowlabel
= np
->flow_label
;
695 fl
.oif
= sk
->sk_bound_dev_if
;
697 if (msg
->msg_controllen
) {
699 memset(opt
, 0, sizeof(struct ipv6_txoptions
));
700 opt
->tot_len
= sizeof(*opt
);
702 err
= datagram_send_ctl(msg
, &fl
, opt
, &hlimit
, &tclass
);
704 fl6_sock_release(flowlabel
);
707 if ((fl
.fl6_flowlabel
&IPV6_FLOWLABEL_MASK
) && !flowlabel
) {
708 flowlabel
= fl6_sock_lookup(sk
, fl
.fl6_flowlabel
);
709 if (flowlabel
== NULL
)
712 if (!(opt
->opt_nflen
|opt
->opt_flen
))
719 opt
= fl6_merge_options(&opt_space
, flowlabel
, opt
);
720 opt
= ipv6_fixup_options(&opt_space
, opt
);
722 fl
.proto
= sk
->sk_protocol
;
723 ipv6_addr_copy(&fl
.fl6_dst
, daddr
);
724 if (ipv6_addr_any(&fl
.fl6_src
) && !ipv6_addr_any(&np
->saddr
))
725 ipv6_addr_copy(&fl
.fl6_src
, &np
->saddr
);
726 fl
.fl_ip_sport
= inet
->sport
;
728 /* merge ip6_build_xmit from ip6_output */
729 if (opt
&& opt
->srcrt
) {
730 struct rt0_hdr
*rt0
= (struct rt0_hdr
*) opt
->srcrt
;
731 ipv6_addr_copy(&final
, &fl
.fl6_dst
);
732 ipv6_addr_copy(&fl
.fl6_dst
, rt0
->addr
);
737 if (!fl
.oif
&& ipv6_addr_is_multicast(&fl
.fl6_dst
)) {
738 fl
.oif
= np
->mcast_oif
;
742 security_sk_classify_flow(sk
, &fl
);
744 err
= ip6_sk_dst_lookup(sk
, &dst
, &fl
);
748 ipv6_addr_copy(&fl
.fl6_dst
, final_p
);
750 if ((err
= xfrm_lookup(&dst
, &fl
, sk
, 1)) < 0)
754 if (ipv6_addr_is_multicast(&fl
.fl6_dst
))
755 hlimit
= np
->mcast_hops
;
757 hlimit
= np
->hop_limit
;
759 hlimit
= dst_metric(dst
, RTAX_HOPLIMIT
);
761 hlimit
= ipv6_get_hoplimit(dst
->dev
);
770 if (msg
->msg_flags
&MSG_CONFIRM
)
775 if (unlikely(up
->pending
)) {
776 /* The socket is already corked while preparing it. */
777 /* ... which is an evident application bug. --ANK */
780 LIMIT_NETDEBUG(KERN_DEBUG
"udp cork app bug 2\n");
785 up
->pending
= AF_INET6
;
789 getfrag
= is_udplite
? udplite_getfrag
: ip_generic_getfrag
;
790 err
= ip6_append_data(sk
, getfrag
, msg
->msg_iov
, ulen
,
791 sizeof(struct udphdr
), hlimit
, tclass
, opt
, &fl
,
792 (struct rt6_info
*)dst
,
793 corkreq
? msg
->msg_flags
|MSG_MORE
: msg
->msg_flags
);
795 udp_v6_flush_pending_frames(sk
);
797 err
= udp_v6_push_pending_frames(sk
);
798 else if (unlikely(skb_queue_empty(&sk
->sk_write_queue
)))
803 ip6_dst_store(sk
, dst
,
804 ipv6_addr_equal(&fl
.fl6_dst
, &np
->daddr
) ?
806 #ifdef CONFIG_IPV6_SUBTREES
807 ipv6_addr_equal(&fl
.fl6_src
, &np
->saddr
) ?
817 err
= np
->recverr
? net_xmit_errno(err
) : 0;
820 fl6_sock_release(flowlabel
);
822 UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS
, is_udplite
);
826 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
827 * ENOBUFS might not be good (it's not tunable per se), but otherwise
828 * we don't have a good statistic (IpOutDiscards but it can be too many
829 * things). We could add another new stat but at least for now that
830 * seems like overkill.
832 if (err
== -ENOBUFS
|| test_bit(SOCK_NOSPACE
, &sk
->sk_socket
->flags
)) {
833 UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS
, is_udplite
);
839 if (!(msg
->msg_flags
&MSG_PROBE
) || len
)
840 goto back_from_confirm
;
845 int udpv6_destroy_sock(struct sock
*sk
)
848 udp_v6_flush_pending_frames(sk
);
851 inet6_destroy_sock(sk
);
857 * Socket option code for UDP
859 int udpv6_setsockopt(struct sock
*sk
, int level
, int optname
,
860 char __user
*optval
, int optlen
)
862 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
863 return udp_lib_setsockopt(sk
, level
, optname
, optval
, optlen
,
864 udp_v6_push_pending_frames
);
865 return ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
869 int compat_udpv6_setsockopt(struct sock
*sk
, int level
, int optname
,
870 char __user
*optval
, int optlen
)
872 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
873 return udp_lib_setsockopt(sk
, level
, optname
, optval
, optlen
,
874 udp_v6_push_pending_frames
);
875 return compat_ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
879 int udpv6_getsockopt(struct sock
*sk
, int level
, int optname
,
880 char __user
*optval
, int __user
*optlen
)
882 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
883 return udp_lib_getsockopt(sk
, level
, optname
, optval
, optlen
);
884 return ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
888 int compat_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 compat_ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
897 static struct inet6_protocol udpv6_protocol
= {
898 .handler
= udpv6_rcv
,
899 .err_handler
= udpv6_err
,
900 .flags
= INET6_PROTO_NOPOLICY
|INET6_PROTO_FINAL
,
903 /* ------------------------------------------------------------------------ */
904 #ifdef CONFIG_PROC_FS
906 static void udp6_sock_seq_show(struct seq_file
*seq
, struct sock
*sp
, int bucket
)
908 struct inet_sock
*inet
= inet_sk(sp
);
909 struct ipv6_pinfo
*np
= inet6_sk(sp
);
910 struct in6_addr
*dest
, *src
;
914 src
= &np
->rcv_saddr
;
915 destp
= ntohs(inet
->dport
);
916 srcp
= ntohs(inet
->sport
);
918 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
919 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
921 src
->s6_addr32
[0], src
->s6_addr32
[1],
922 src
->s6_addr32
[2], src
->s6_addr32
[3], srcp
,
923 dest
->s6_addr32
[0], dest
->s6_addr32
[1],
924 dest
->s6_addr32
[2], dest
->s6_addr32
[3], destp
,
926 atomic_read(&sp
->sk_wmem_alloc
),
927 atomic_read(&sp
->sk_rmem_alloc
),
931 atomic_read(&sp
->sk_refcnt
), sp
);
934 int udp6_seq_show(struct seq_file
*seq
, void *v
)
936 if (v
== SEQ_START_TOKEN
)
941 "st tx_queue rx_queue tr tm->when retrnsmt"
942 " uid timeout inode\n");
944 udp6_sock_seq_show(seq
, v
, ((struct udp_iter_state
*)seq
->private)->bucket
);
948 static struct file_operations udp6_seq_fops
;
949 static struct udp_seq_afinfo udp6_seq_afinfo
= {
950 .owner
= THIS_MODULE
,
953 .hashtable
= udp_hash
,
954 .seq_show
= udp6_seq_show
,
955 .seq_fops
= &udp6_seq_fops
,
958 int __init
udp6_proc_init(void)
960 return udp_proc_register(&udp6_seq_afinfo
);
963 void udp6_proc_exit(void) {
964 udp_proc_unregister(&udp6_seq_afinfo
);
966 #endif /* CONFIG_PROC_FS */
968 /* ------------------------------------------------------------------------ */
970 struct proto udpv6_prot
= {
972 .owner
= THIS_MODULE
,
973 .close
= udp_lib_close
,
974 .connect
= ip6_datagram_connect
,
975 .disconnect
= udp_disconnect
,
977 .destroy
= udpv6_destroy_sock
,
978 .setsockopt
= udpv6_setsockopt
,
979 .getsockopt
= udpv6_getsockopt
,
980 .sendmsg
= udpv6_sendmsg
,
981 .recvmsg
= udpv6_recvmsg
,
982 .backlog_rcv
= udpv6_queue_rcv_skb
,
983 .hash
= udp_lib_hash
,
984 .unhash
= udp_lib_unhash
,
985 .get_port
= udp_v6_get_port
,
986 .obj_size
= sizeof(struct udp6_sock
),
988 .compat_setsockopt
= compat_udpv6_setsockopt
,
989 .compat_getsockopt
= compat_udpv6_getsockopt
,
993 static struct inet_protosw udpv6_protosw
= {
995 .protocol
= IPPROTO_UDP
,
997 .ops
= &inet6_dgram_ops
,
999 .no_check
= UDP_CSUM_DEFAULT
,
1000 .flags
= INET_PROTOSW_PERMANENT
,
1004 void __init
udpv6_init(void)
1006 if (inet6_add_protocol(&udpv6_protocol
, IPPROTO_UDP
) < 0)
1007 printk(KERN_ERR
"udpv6_init: Could not register protocol\n");
1008 inet6_register_protosw(&udpv6_protosw
);