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>
45 #include <net/ndisc.h>
46 #include <net/protocol.h>
47 #include <net/transp_v6.h>
48 #include <net/ip6_route.h>
49 #include <net/addrconf.h>
53 #include <net/inet_common.h>
54 #include <net/tcp_states.h>
56 #include <net/ip6_checksum.h>
59 #include <linux/proc_fs.h>
60 #include <linux/seq_file.h>
62 DEFINE_SNMP_STAT(struct udp_mib
, udp_stats_in6
) __read_mostly
;
64 /* Grrr, addr_type already calculated by caller, but I don't want
65 * to add some silly "cookie" argument to this method just for that.
67 static int udp_v6_get_port(struct sock
*sk
, unsigned short snum
)
70 struct hlist_node
*node
;
72 write_lock_bh(&udp_hash_lock
);
74 int best_size_so_far
, best
, result
, i
;
76 if (udp_port_rover
> sysctl_local_port_range
[1] ||
77 udp_port_rover
< sysctl_local_port_range
[0])
78 udp_port_rover
= sysctl_local_port_range
[0];
79 best_size_so_far
= 32767;
80 best
= result
= udp_port_rover
;
81 for (i
= 0; i
< UDP_HTABLE_SIZE
; i
++, result
++) {
83 struct hlist_head
*list
;
85 list
= &udp_hash
[result
& (UDP_HTABLE_SIZE
- 1)];
86 if (hlist_empty(list
)) {
87 if (result
> sysctl_local_port_range
[1])
88 result
= sysctl_local_port_range
[0] +
89 ((result
- sysctl_local_port_range
[0]) &
90 (UDP_HTABLE_SIZE
- 1));
94 sk_for_each(sk2
, node
, list
)
95 if (++size
>= best_size_so_far
)
97 best_size_so_far
= size
;
102 for(i
= 0; i
< (1 << 16) / UDP_HTABLE_SIZE
; i
++, result
+= UDP_HTABLE_SIZE
) {
103 if (result
> sysctl_local_port_range
[1])
104 result
= sysctl_local_port_range
[0]
105 + ((result
- sysctl_local_port_range
[0]) &
106 (UDP_HTABLE_SIZE
- 1));
107 if (!udp_lport_inuse(result
))
110 if (i
>= (1 << 16) / UDP_HTABLE_SIZE
)
113 udp_port_rover
= snum
= result
;
115 sk_for_each(sk2
, node
,
116 &udp_hash
[snum
& (UDP_HTABLE_SIZE
- 1)]) {
117 if (inet_sk(sk2
)->num
== snum
&&
119 (!sk2
->sk_bound_dev_if
||
120 !sk
->sk_bound_dev_if
||
121 sk2
->sk_bound_dev_if
== sk
->sk_bound_dev_if
) &&
122 (!sk2
->sk_reuse
|| !sk
->sk_reuse
) &&
123 ipv6_rcv_saddr_equal(sk
, sk2
))
128 inet_sk(sk
)->num
= snum
;
129 if (sk_unhashed(sk
)) {
130 sk_add_node(sk
, &udp_hash
[snum
& (UDP_HTABLE_SIZE
- 1)]);
131 sock_prot_inc_use(sk
->sk_prot
);
133 write_unlock_bh(&udp_hash_lock
);
137 write_unlock_bh(&udp_hash_lock
);
141 static void udp_v6_hash(struct sock
*sk
)
146 static void udp_v6_unhash(struct sock
*sk
)
148 write_lock_bh(&udp_hash_lock
);
149 if (sk_del_node_init(sk
)) {
150 inet_sk(sk
)->num
= 0;
151 sock_prot_dec_use(sk
->sk_prot
);
153 write_unlock_bh(&udp_hash_lock
);
156 static struct sock
*udp_v6_lookup(struct in6_addr
*saddr
, u16 sport
,
157 struct in6_addr
*daddr
, u16 dport
, int dif
)
159 struct sock
*sk
, *result
= NULL
;
160 struct hlist_node
*node
;
161 unsigned short hnum
= ntohs(dport
);
164 read_lock(&udp_hash_lock
);
165 sk_for_each(sk
, node
, &udp_hash
[hnum
& (UDP_HTABLE_SIZE
- 1)]) {
166 struct inet_sock
*inet
= inet_sk(sk
);
168 if (inet
->num
== hnum
&& sk
->sk_family
== PF_INET6
) {
169 struct ipv6_pinfo
*np
= inet6_sk(sk
);
172 if (inet
->dport
!= sport
)
176 if (!ipv6_addr_any(&np
->rcv_saddr
)) {
177 if (!ipv6_addr_equal(&np
->rcv_saddr
, daddr
))
181 if (!ipv6_addr_any(&np
->daddr
)) {
182 if (!ipv6_addr_equal(&np
->daddr
, saddr
))
186 if (sk
->sk_bound_dev_if
) {
187 if (sk
->sk_bound_dev_if
!= dif
)
194 } else if(score
> badness
) {
202 read_unlock(&udp_hash_lock
);
210 static void udpv6_close(struct sock
*sk
, long timeout
)
212 sk_common_release(sk
);
216 * This should be easy, if there is something there we
217 * return it, otherwise we block.
220 static int udpv6_recvmsg(struct kiocb
*iocb
, struct sock
*sk
,
221 struct msghdr
*msg
, size_t len
,
222 int noblock
, int flags
, int *addr_len
)
224 struct ipv6_pinfo
*np
= inet6_sk(sk
);
225 struct inet_sock
*inet
= inet_sk(sk
);
231 *addr_len
=sizeof(struct sockaddr_in6
);
233 if (flags
& MSG_ERRQUEUE
)
234 return ipv6_recv_error(sk
, msg
, len
);
237 skb
= skb_recv_datagram(sk
, flags
, noblock
, &err
);
241 copied
= skb
->len
- sizeof(struct udphdr
);
244 msg
->msg_flags
|= MSG_TRUNC
;
247 if (skb
->ip_summed
==CHECKSUM_UNNECESSARY
) {
248 err
= skb_copy_datagram_iovec(skb
, sizeof(struct udphdr
), msg
->msg_iov
,
250 } else if (msg
->msg_flags
&MSG_TRUNC
) {
251 if (__skb_checksum_complete(skb
))
253 err
= skb_copy_datagram_iovec(skb
, sizeof(struct udphdr
), msg
->msg_iov
,
256 err
= skb_copy_and_csum_datagram_iovec(skb
, sizeof(struct udphdr
), msg
->msg_iov
);
263 sock_recv_timestamp(msg
, sk
, skb
);
265 /* Copy the address. */
267 struct sockaddr_in6
*sin6
;
269 sin6
= (struct sockaddr_in6
*) msg
->msg_name
;
270 sin6
->sin6_family
= AF_INET6
;
271 sin6
->sin6_port
= skb
->h
.uh
->source
;
272 sin6
->sin6_flowinfo
= 0;
273 sin6
->sin6_scope_id
= 0;
275 if (skb
->protocol
== htons(ETH_P_IP
))
276 ipv6_addr_set(&sin6
->sin6_addr
, 0, 0,
277 htonl(0xffff), skb
->nh
.iph
->saddr
);
279 ipv6_addr_copy(&sin6
->sin6_addr
, &skb
->nh
.ipv6h
->saddr
);
280 if (ipv6_addr_type(&sin6
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
281 sin6
->sin6_scope_id
= IP6CB(skb
)->iif
;
285 if (skb
->protocol
== htons(ETH_P_IP
)) {
286 if (inet
->cmsg_flags
)
287 ip_cmsg_recv(msg
, skb
);
290 datagram_recv_ctl(sk
, msg
, skb
);
294 if (flags
& MSG_TRUNC
)
295 err
= skb
->len
- sizeof(struct udphdr
);
298 skb_free_datagram(sk
, skb
);
303 skb_kill_datagram(sk
, skb
, flags
);
305 if (flags
& MSG_DONTWAIT
) {
306 UDP6_INC_STATS_USER(UDP_MIB_INERRORS
);
312 static void udpv6_err(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
313 int type
, int code
, int offset
, __u32 info
)
315 struct ipv6_pinfo
*np
;
316 struct ipv6hdr
*hdr
= (struct ipv6hdr
*)skb
->data
;
317 struct net_device
*dev
= skb
->dev
;
318 struct in6_addr
*saddr
= &hdr
->saddr
;
319 struct in6_addr
*daddr
= &hdr
->daddr
;
320 struct udphdr
*uh
= (struct udphdr
*)(skb
->data
+offset
);
324 sk
= udp_v6_lookup(daddr
, uh
->dest
, saddr
, uh
->source
, dev
->ifindex
);
331 if (!icmpv6_err_convert(type
, code
, &err
) && !np
->recverr
)
334 if (sk
->sk_state
!= TCP_ESTABLISHED
&& !np
->recverr
)
338 ipv6_icmp_error(sk
, skb
, err
, uh
->dest
, ntohl(info
), (u8
*)(uh
+1));
341 sk
->sk_error_report(sk
);
346 static inline int udpv6_queue_rcv_skb(struct sock
* sk
, struct sk_buff
*skb
)
350 if (!xfrm6_policy_check(sk
, XFRM_POLICY_IN
, skb
)) {
355 if (skb_checksum_complete(skb
)) {
356 UDP6_INC_STATS_BH(UDP_MIB_INERRORS
);
361 if ((rc
= sock_queue_rcv_skb(sk
,skb
)) < 0) {
362 /* Note that an ENOMEM error is charged twice */
364 UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS
);
365 UDP6_INC_STATS_BH(UDP_MIB_INERRORS
);
369 UDP6_INC_STATS_BH(UDP_MIB_INDATAGRAMS
);
373 static struct sock
*udp_v6_mcast_next(struct sock
*sk
,
374 u16 loc_port
, struct in6_addr
*loc_addr
,
375 u16 rmt_port
, struct in6_addr
*rmt_addr
,
378 struct hlist_node
*node
;
380 unsigned short num
= ntohs(loc_port
);
382 sk_for_each_from(s
, node
) {
383 struct inet_sock
*inet
= inet_sk(s
);
385 if (inet
->num
== num
&& s
->sk_family
== PF_INET6
) {
386 struct ipv6_pinfo
*np
= inet6_sk(s
);
388 if (inet
->dport
!= rmt_port
)
391 if (!ipv6_addr_any(&np
->daddr
) &&
392 !ipv6_addr_equal(&np
->daddr
, rmt_addr
))
395 if (s
->sk_bound_dev_if
&& s
->sk_bound_dev_if
!= dif
)
398 if (!ipv6_addr_any(&np
->rcv_saddr
)) {
399 if (!ipv6_addr_equal(&np
->rcv_saddr
, loc_addr
))
402 if(!inet6_mc_check(s
, loc_addr
, rmt_addr
))
411 * Note: called only from the BH handler context,
412 * so we don't need to lock the hashes.
414 static void udpv6_mcast_deliver(struct udphdr
*uh
,
415 struct in6_addr
*saddr
, struct in6_addr
*daddr
,
418 struct sock
*sk
, *sk2
;
421 read_lock(&udp_hash_lock
);
422 sk
= sk_head(&udp_hash
[ntohs(uh
->dest
) & (UDP_HTABLE_SIZE
- 1)]);
423 dif
= skb
->dev
->ifindex
;
424 sk
= udp_v6_mcast_next(sk
, uh
->dest
, daddr
, uh
->source
, saddr
, dif
);
431 while ((sk2
= udp_v6_mcast_next(sk_next(sk2
), uh
->dest
, daddr
,
432 uh
->source
, saddr
, dif
))) {
433 struct sk_buff
*buff
= skb_clone(skb
, GFP_ATOMIC
);
435 udpv6_queue_rcv_skb(sk2
, buff
);
437 udpv6_queue_rcv_skb(sk
, skb
);
439 read_unlock(&udp_hash_lock
);
442 static int udpv6_rcv(struct sk_buff
**pskb
)
444 struct sk_buff
*skb
= *pskb
;
447 struct net_device
*dev
= skb
->dev
;
448 struct in6_addr
*saddr
, *daddr
;
451 if (!pskb_may_pull(skb
, sizeof(struct udphdr
)))
454 saddr
= &skb
->nh
.ipv6h
->saddr
;
455 daddr
= &skb
->nh
.ipv6h
->daddr
;
458 ulen
= ntohs(uh
->len
);
460 /* Check for jumbo payload */
464 if (ulen
> skb
->len
|| ulen
< sizeof(*uh
))
467 if (uh
->check
== 0) {
468 /* RFC 2460 section 8.1 says that we SHOULD log
469 this error. Well, it is reasonable.
471 LIMIT_NETDEBUG(KERN_INFO
"IPv6: udp checksum is 0\n");
475 if (ulen
< skb
->len
) {
476 if (pskb_trim_rcsum(skb
, ulen
))
478 saddr
= &skb
->nh
.ipv6h
->saddr
;
479 daddr
= &skb
->nh
.ipv6h
->daddr
;
483 if (skb
->ip_summed
== CHECKSUM_COMPLETE
&&
484 !csum_ipv6_magic(saddr
, daddr
, ulen
, IPPROTO_UDP
, skb
->csum
))
485 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
487 if (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)
488 skb
->csum
= ~csum_ipv6_magic(saddr
, daddr
, ulen
, IPPROTO_UDP
, 0);
491 * Multicast receive code
493 if (ipv6_addr_is_multicast(daddr
)) {
494 udpv6_mcast_deliver(uh
, saddr
, daddr
, skb
);
501 * check socket cache ... must talk to Alan about his plans
502 * for sock caches... i'll skip this for now.
504 sk
= udp_v6_lookup(saddr
, uh
->source
, daddr
, uh
->dest
, dev
->ifindex
);
507 if (!xfrm6_policy_check(NULL
, XFRM_POLICY_IN
, skb
))
510 if (skb_checksum_complete(skb
))
512 UDP6_INC_STATS_BH(UDP_MIB_NOPORTS
);
514 icmpv6_send(skb
, ICMPV6_DEST_UNREACH
, ICMPV6_PORT_UNREACH
, 0, dev
);
522 udpv6_queue_rcv_skb(sk
, skb
);
528 printk(KERN_DEBUG
"UDP: short packet: %d/%u\n", ulen
, skb
->len
);
531 UDP6_INC_STATS_BH(UDP_MIB_INERRORS
);
536 * Throw away all pending data and cancel the corking. Socket is locked.
538 static void udp_v6_flush_pending_frames(struct sock
*sk
)
540 struct udp_sock
*up
= udp_sk(sk
);
545 ip6_flush_pending_frames(sk
);
553 static int udp_v6_push_pending_frames(struct sock
*sk
, struct udp_sock
*up
)
557 struct inet_sock
*inet
= inet_sk(sk
);
558 struct flowi
*fl
= &inet
->cork
.fl
;
561 /* Grab the skbuff where UDP header space exists. */
562 if ((skb
= skb_peek(&sk
->sk_write_queue
)) == NULL
)
566 * Create a UDP header
569 uh
->source
= fl
->fl_ip_sport
;
570 uh
->dest
= fl
->fl_ip_dport
;
571 uh
->len
= htons(up
->len
);
574 if (sk
->sk_no_check
== UDP_CSUM_NOXMIT
) {
575 skb
->ip_summed
= CHECKSUM_NONE
;
579 if (skb_queue_len(&sk
->sk_write_queue
) == 1) {
580 skb
->csum
= csum_partial((char *)uh
,
581 sizeof(struct udphdr
), skb
->csum
);
582 uh
->check
= csum_ipv6_magic(&fl
->fl6_src
,
584 up
->len
, fl
->proto
, skb
->csum
);
588 skb_queue_walk(&sk
->sk_write_queue
, skb
) {
589 tmp_csum
= csum_add(tmp_csum
, skb
->csum
);
591 tmp_csum
= csum_partial((char *)uh
,
592 sizeof(struct udphdr
), tmp_csum
);
593 tmp_csum
= csum_ipv6_magic(&fl
->fl6_src
,
595 up
->len
, fl
->proto
, tmp_csum
);
596 uh
->check
= tmp_csum
;
603 err
= ip6_push_pending_frames(sk
);
610 static int udpv6_sendmsg(struct kiocb
*iocb
, struct sock
*sk
,
611 struct msghdr
*msg
, size_t len
)
613 struct ipv6_txoptions opt_space
;
614 struct udp_sock
*up
= udp_sk(sk
);
615 struct inet_sock
*inet
= inet_sk(sk
);
616 struct ipv6_pinfo
*np
= inet6_sk(sk
);
617 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) msg
->msg_name
;
618 struct in6_addr
*daddr
, *final_p
= NULL
, final
;
619 struct ipv6_txoptions
*opt
= NULL
;
620 struct ip6_flowlabel
*flowlabel
= NULL
;
621 struct flowi
*fl
= &inet
->cork
.fl
;
622 struct dst_entry
*dst
;
623 int addr_len
= msg
->msg_namelen
;
627 int corkreq
= up
->corkflag
|| msg
->msg_flags
&MSG_MORE
;
631 /* destination address check */
633 if (addr_len
< offsetof(struct sockaddr
, sa_data
))
636 switch (sin6
->sin6_family
) {
638 if (addr_len
< SIN6_LEN_RFC2133
)
640 daddr
= &sin6
->sin6_addr
;
645 msg
->msg_name
= sin6
= NULL
;
646 msg
->msg_namelen
= addr_len
= 0;
652 } else if (!up
->pending
) {
653 if (sk
->sk_state
!= TCP_ESTABLISHED
)
654 return -EDESTADDRREQ
;
660 if (ipv6_addr_type(daddr
) == IPV6_ADDR_MAPPED
) {
661 struct sockaddr_in sin
;
662 sin
.sin_family
= AF_INET
;
663 sin
.sin_port
= sin6
? sin6
->sin6_port
: inet
->dport
;
664 sin
.sin_addr
.s_addr
= daddr
->s6_addr32
[3];
665 msg
->msg_name
= &sin
;
666 msg
->msg_namelen
= sizeof(sin
);
668 if (__ipv6_only_sock(sk
))
670 return udp_sendmsg(iocb
, sk
, msg
, len
);
674 if (up
->pending
== AF_INET
)
675 return udp_sendmsg(iocb
, sk
, msg
, len
);
677 /* Rough check on arithmetic overflow,
678 better check is made in ip6_build_xmit
680 if (len
> INT_MAX
- sizeof(struct udphdr
))
685 * There are pending frames.
686 * The socket lock must be held while it's corked.
689 if (likely(up
->pending
)) {
690 if (unlikely(up
->pending
!= AF_INET6
)) {
692 return -EAFNOSUPPORT
;
699 ulen
+= sizeof(struct udphdr
);
701 memset(fl
, 0, sizeof(*fl
));
704 if (sin6
->sin6_port
== 0)
707 fl
->fl_ip_dport
= sin6
->sin6_port
;
708 daddr
= &sin6
->sin6_addr
;
711 fl
->fl6_flowlabel
= sin6
->sin6_flowinfo
&IPV6_FLOWINFO_MASK
;
712 if (fl
->fl6_flowlabel
&IPV6_FLOWLABEL_MASK
) {
713 flowlabel
= fl6_sock_lookup(sk
, fl
->fl6_flowlabel
);
714 if (flowlabel
== NULL
)
716 daddr
= &flowlabel
->dst
;
721 * Otherwise it will be difficult to maintain
724 if (sk
->sk_state
== TCP_ESTABLISHED
&&
725 ipv6_addr_equal(daddr
, &np
->daddr
))
728 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
729 sin6
->sin6_scope_id
&&
730 ipv6_addr_type(daddr
)&IPV6_ADDR_LINKLOCAL
)
731 fl
->oif
= sin6
->sin6_scope_id
;
733 if (sk
->sk_state
!= TCP_ESTABLISHED
)
734 return -EDESTADDRREQ
;
736 fl
->fl_ip_dport
= inet
->dport
;
738 fl
->fl6_flowlabel
= np
->flow_label
;
743 fl
->oif
= sk
->sk_bound_dev_if
;
745 if (msg
->msg_controllen
) {
747 memset(opt
, 0, sizeof(struct ipv6_txoptions
));
748 opt
->tot_len
= sizeof(*opt
);
750 err
= datagram_send_ctl(msg
, fl
, opt
, &hlimit
, &tclass
);
752 fl6_sock_release(flowlabel
);
755 if ((fl
->fl6_flowlabel
&IPV6_FLOWLABEL_MASK
) && !flowlabel
) {
756 flowlabel
= fl6_sock_lookup(sk
, fl
->fl6_flowlabel
);
757 if (flowlabel
== NULL
)
760 if (!(opt
->opt_nflen
|opt
->opt_flen
))
767 opt
= fl6_merge_options(&opt_space
, flowlabel
, opt
);
768 opt
= ipv6_fixup_options(&opt_space
, opt
);
770 fl
->proto
= IPPROTO_UDP
;
771 ipv6_addr_copy(&fl
->fl6_dst
, daddr
);
772 if (ipv6_addr_any(&fl
->fl6_src
) && !ipv6_addr_any(&np
->saddr
))
773 ipv6_addr_copy(&fl
->fl6_src
, &np
->saddr
);
774 fl
->fl_ip_sport
= inet
->sport
;
776 /* merge ip6_build_xmit from ip6_output */
777 if (opt
&& opt
->srcrt
) {
778 struct rt0_hdr
*rt0
= (struct rt0_hdr
*) opt
->srcrt
;
779 ipv6_addr_copy(&final
, &fl
->fl6_dst
);
780 ipv6_addr_copy(&fl
->fl6_dst
, rt0
->addr
);
785 if (!fl
->oif
&& ipv6_addr_is_multicast(&fl
->fl6_dst
)) {
786 fl
->oif
= np
->mcast_oif
;
790 security_sk_classify_flow(sk
, fl
);
792 err
= ip6_sk_dst_lookup(sk
, &dst
, fl
);
796 ipv6_addr_copy(&fl
->fl6_dst
, final_p
);
798 if ((err
= xfrm_lookup(&dst
, fl
, sk
, 0)) < 0)
802 if (ipv6_addr_is_multicast(&fl
->fl6_dst
))
803 hlimit
= np
->mcast_hops
;
805 hlimit
= np
->hop_limit
;
807 hlimit
= dst_metric(dst
, RTAX_HOPLIMIT
);
809 hlimit
= ipv6_get_hoplimit(dst
->dev
);
818 if (msg
->msg_flags
&MSG_CONFIRM
)
823 if (unlikely(up
->pending
)) {
824 /* The socket is already corked while preparing it. */
825 /* ... which is an evident application bug. --ANK */
828 LIMIT_NETDEBUG(KERN_DEBUG
"udp cork app bug 2\n");
833 up
->pending
= AF_INET6
;
837 err
= ip6_append_data(sk
, ip_generic_getfrag
, msg
->msg_iov
, ulen
,
838 sizeof(struct udphdr
), hlimit
, tclass
, opt
, fl
,
839 (struct rt6_info
*)dst
,
840 corkreq
? msg
->msg_flags
|MSG_MORE
: msg
->msg_flags
);
842 udp_v6_flush_pending_frames(sk
);
844 err
= udp_v6_push_pending_frames(sk
, up
);
848 ip6_dst_store(sk
, dst
,
849 ipv6_addr_equal(&fl
->fl6_dst
, &np
->daddr
) ?
851 #ifdef CONFIG_IPV6_SUBTREES
852 ipv6_addr_equal(&fl
->fl6_src
, &np
->saddr
) ?
862 err
= np
->recverr
? net_xmit_errno(err
) : 0;
865 fl6_sock_release(flowlabel
);
867 UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS
);
871 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
872 * ENOBUFS might not be good (it's not tunable per se), but otherwise
873 * we don't have a good statistic (IpOutDiscards but it can be too many
874 * things). We could add another new stat but at least for now that
875 * seems like overkill.
877 if (err
== -ENOBUFS
|| test_bit(SOCK_NOSPACE
, &sk
->sk_socket
->flags
)) {
878 UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS
);
884 if (!(msg
->msg_flags
&MSG_PROBE
) || len
)
885 goto back_from_confirm
;
890 static int udpv6_destroy_sock(struct sock
*sk
)
893 udp_v6_flush_pending_frames(sk
);
896 inet6_destroy_sock(sk
);
902 * Socket option code for UDP
904 static int do_udpv6_setsockopt(struct sock
*sk
, int level
, int optname
,
905 char __user
*optval
, int optlen
)
907 struct udp_sock
*up
= udp_sk(sk
);
911 if(optlen
<sizeof(int))
914 if (get_user(val
, (int __user
*)optval
))
924 udp_v6_push_pending_frames(sk
, up
);
932 up
->encap_type
= val
;
948 static int udpv6_setsockopt(struct sock
*sk
, int level
, int optname
,
949 char __user
*optval
, int optlen
)
951 if (level
!= SOL_UDP
)
952 return ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
953 return do_udpv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
957 static int compat_udpv6_setsockopt(struct sock
*sk
, int level
, int optname
,
958 char __user
*optval
, int optlen
)
960 if (level
!= SOL_UDP
)
961 return compat_ipv6_setsockopt(sk
, level
, optname
,
963 return do_udpv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
967 static int do_udpv6_getsockopt(struct sock
*sk
, int level
, int optname
,
968 char __user
*optval
, int __user
*optlen
)
970 struct udp_sock
*up
= udp_sk(sk
);
973 if(get_user(len
,optlen
))
976 len
= min_t(unsigned int, len
, sizeof(int));
987 val
= up
->encap_type
;
994 if(put_user(len
, optlen
))
996 if(copy_to_user(optval
, &val
,len
))
1001 static int udpv6_getsockopt(struct sock
*sk
, int level
, int optname
,
1002 char __user
*optval
, int __user
*optlen
)
1004 if (level
!= SOL_UDP
)
1005 return ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
1006 return do_udpv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
1009 #ifdef CONFIG_COMPAT
1010 static int compat_udpv6_getsockopt(struct sock
*sk
, int level
, int optname
,
1011 char __user
*optval
, int __user
*optlen
)
1013 if (level
!= SOL_UDP
)
1014 return compat_ipv6_getsockopt(sk
, level
, optname
,
1016 return do_udpv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
1020 static struct inet6_protocol udpv6_protocol
= {
1021 .handler
= udpv6_rcv
,
1022 .err_handler
= udpv6_err
,
1023 .flags
= INET6_PROTO_NOPOLICY
|INET6_PROTO_FINAL
,
1026 /* ------------------------------------------------------------------------ */
1027 #ifdef CONFIG_PROC_FS
1029 static void udp6_sock_seq_show(struct seq_file
*seq
, struct sock
*sp
, int bucket
)
1031 struct inet_sock
*inet
= inet_sk(sp
);
1032 struct ipv6_pinfo
*np
= inet6_sk(sp
);
1033 struct in6_addr
*dest
, *src
;
1037 src
= &np
->rcv_saddr
;
1038 destp
= ntohs(inet
->dport
);
1039 srcp
= ntohs(inet
->sport
);
1041 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1042 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
1044 src
->s6_addr32
[0], src
->s6_addr32
[1],
1045 src
->s6_addr32
[2], src
->s6_addr32
[3], srcp
,
1046 dest
->s6_addr32
[0], dest
->s6_addr32
[1],
1047 dest
->s6_addr32
[2], dest
->s6_addr32
[3], destp
,
1049 atomic_read(&sp
->sk_wmem_alloc
),
1050 atomic_read(&sp
->sk_rmem_alloc
),
1054 atomic_read(&sp
->sk_refcnt
), sp
);
1057 static int udp6_seq_show(struct seq_file
*seq
, void *v
)
1059 if (v
== SEQ_START_TOKEN
)
1064 "st tx_queue rx_queue tr tm->when retrnsmt"
1065 " uid timeout inode\n");
1067 udp6_sock_seq_show(seq
, v
, ((struct udp_iter_state
*)seq
->private)->bucket
);
1071 static struct file_operations udp6_seq_fops
;
1072 static struct udp_seq_afinfo udp6_seq_afinfo
= {
1073 .owner
= THIS_MODULE
,
1076 .seq_show
= udp6_seq_show
,
1077 .seq_fops
= &udp6_seq_fops
,
1080 int __init
udp6_proc_init(void)
1082 return udp_proc_register(&udp6_seq_afinfo
);
1085 void udp6_proc_exit(void) {
1086 udp_proc_unregister(&udp6_seq_afinfo
);
1088 #endif /* CONFIG_PROC_FS */
1090 /* ------------------------------------------------------------------------ */
1092 struct proto udpv6_prot
= {
1094 .owner
= THIS_MODULE
,
1095 .close
= udpv6_close
,
1096 .connect
= ip6_datagram_connect
,
1097 .disconnect
= udp_disconnect
,
1099 .destroy
= udpv6_destroy_sock
,
1100 .setsockopt
= udpv6_setsockopt
,
1101 .getsockopt
= udpv6_getsockopt
,
1102 .sendmsg
= udpv6_sendmsg
,
1103 .recvmsg
= udpv6_recvmsg
,
1104 .backlog_rcv
= udpv6_queue_rcv_skb
,
1105 .hash
= udp_v6_hash
,
1106 .unhash
= udp_v6_unhash
,
1107 .get_port
= udp_v6_get_port
,
1108 .obj_size
= sizeof(struct udp6_sock
),
1109 #ifdef CONFIG_COMPAT
1110 .compat_setsockopt
= compat_udpv6_setsockopt
,
1111 .compat_getsockopt
= compat_udpv6_getsockopt
,
1115 static struct inet_protosw udpv6_protosw
= {
1117 .protocol
= IPPROTO_UDP
,
1118 .prot
= &udpv6_prot
,
1119 .ops
= &inet6_dgram_ops
,
1121 .no_check
= UDP_CSUM_DEFAULT
,
1122 .flags
= INET_PROTOSW_PERMANENT
,
1126 void __init
udpv6_init(void)
1128 if (inet6_add_protocol(&udpv6_protocol
, IPPROTO_UDP
) < 0)
1129 printk(KERN_ERR
"udpv6_init: Could not register protocol\n");
1130 inet6_register_protosw(&udpv6_protosw
);