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(net
, 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
);
110 static struct sock
*__udp6_lib_lookup_skb(struct sk_buff
*skb
,
111 __be16 sport
, __be16 dport
,
112 struct hlist_head udptable
[])
115 struct ipv6hdr
*iph
= ipv6_hdr(skb
);
117 if (unlikely(sk
= skb_steal_sock(skb
)))
120 return __udp6_lib_lookup(dev_net(skb
->dst
->dev
), &iph
->saddr
, sport
,
121 &iph
->daddr
, dport
, inet6_iif(skb
),
126 * This should be easy, if there is something there we
127 * return it, otherwise we block.
130 int udpv6_recvmsg(struct kiocb
*iocb
, struct sock
*sk
,
131 struct msghdr
*msg
, size_t len
,
132 int noblock
, int flags
, int *addr_len
)
134 struct ipv6_pinfo
*np
= inet6_sk(sk
);
135 struct inet_sock
*inet
= inet_sk(sk
);
137 unsigned int ulen
, copied
;
140 int is_udplite
= IS_UDPLITE(sk
);
143 *addr_len
=sizeof(struct sockaddr_in6
);
145 if (flags
& MSG_ERRQUEUE
)
146 return ipv6_recv_error(sk
, msg
, len
);
149 skb
= __skb_recv_datagram(sk
, flags
| (noblock
? MSG_DONTWAIT
: 0),
154 ulen
= skb
->len
- sizeof(struct udphdr
);
158 else if (copied
< ulen
)
159 msg
->msg_flags
|= MSG_TRUNC
;
162 * If checksum is needed at all, try to do it while copying the
163 * data. If the data is truncated, or if we only want a partial
164 * coverage checksum (UDP-Lite), do it before the copy.
167 if (copied
< ulen
|| UDP_SKB_CB(skb
)->partial_cov
) {
168 if (udp_lib_checksum_complete(skb
))
172 if (skb_csum_unnecessary(skb
))
173 err
= skb_copy_datagram_iovec(skb
, sizeof(struct udphdr
),
174 msg
->msg_iov
, copied
);
176 err
= skb_copy_and_csum_datagram_iovec(skb
, sizeof(struct udphdr
), msg
->msg_iov
);
184 UDP6_INC_STATS_USER(sock_net(sk
),
185 UDP_MIB_INDATAGRAMS
, is_udplite
);
187 sock_recv_timestamp(msg
, sk
, skb
);
189 /* Copy the address. */
191 struct sockaddr_in6
*sin6
;
193 sin6
= (struct sockaddr_in6
*) msg
->msg_name
;
194 sin6
->sin6_family
= AF_INET6
;
195 sin6
->sin6_port
= udp_hdr(skb
)->source
;
196 sin6
->sin6_flowinfo
= 0;
197 sin6
->sin6_scope_id
= 0;
199 if (skb
->protocol
== htons(ETH_P_IP
))
200 ipv6_addr_set(&sin6
->sin6_addr
, 0, 0,
201 htonl(0xffff), ip_hdr(skb
)->saddr
);
203 ipv6_addr_copy(&sin6
->sin6_addr
,
204 &ipv6_hdr(skb
)->saddr
);
205 if (ipv6_addr_type(&sin6
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
206 sin6
->sin6_scope_id
= IP6CB(skb
)->iif
;
210 if (skb
->protocol
== htons(ETH_P_IP
)) {
211 if (inet
->cmsg_flags
)
212 ip_cmsg_recv(msg
, skb
);
215 datagram_recv_ctl(sk
, msg
, skb
);
219 if (flags
& MSG_TRUNC
)
224 skb_free_datagram(sk
, skb
);
231 if (!skb_kill_datagram(sk
, skb
, flags
))
232 UDP6_INC_STATS_USER(sock_net(sk
), UDP_MIB_INERRORS
, is_udplite
);
235 if (flags
& MSG_DONTWAIT
)
240 void __udp6_lib_err(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
241 int type
, int code
, int offset
, __be32 info
,
242 struct hlist_head udptable
[] )
244 struct ipv6_pinfo
*np
;
245 struct ipv6hdr
*hdr
= (struct ipv6hdr
*)skb
->data
;
246 struct in6_addr
*saddr
= &hdr
->saddr
;
247 struct in6_addr
*daddr
= &hdr
->daddr
;
248 struct udphdr
*uh
= (struct udphdr
*)(skb
->data
+offset
);
252 sk
= __udp6_lib_lookup(dev_net(skb
->dev
), daddr
, uh
->dest
,
253 saddr
, uh
->source
, inet6_iif(skb
), udptable
);
259 if (!icmpv6_err_convert(type
, code
, &err
) && !np
->recverr
)
262 if (sk
->sk_state
!= TCP_ESTABLISHED
&& !np
->recverr
)
266 ipv6_icmp_error(sk
, skb
, err
, uh
->dest
, ntohl(info
), (u8
*)(uh
+1));
269 sk
->sk_error_report(sk
);
274 static __inline__
void udpv6_err(struct sk_buff
*skb
,
275 struct inet6_skb_parm
*opt
, int type
,
276 int code
, int offset
, __be32 info
)
278 __udp6_lib_err(skb
, opt
, type
, code
, offset
, info
, udp_hash
);
281 int udpv6_queue_rcv_skb(struct sock
* sk
, struct sk_buff
*skb
)
283 struct udp_sock
*up
= udp_sk(sk
);
285 int is_udplite
= IS_UDPLITE(sk
);
287 if (!xfrm6_policy_check(sk
, XFRM_POLICY_IN
, skb
))
291 * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c).
293 if ((is_udplite
& UDPLITE_RECV_CC
) && UDP_SKB_CB(skb
)->partial_cov
) {
295 if (up
->pcrlen
== 0) { /* full coverage was set */
296 LIMIT_NETDEBUG(KERN_WARNING
"UDPLITE6: partial coverage"
297 " %d while full coverage %d requested\n",
298 UDP_SKB_CB(skb
)->cscov
, skb
->len
);
301 if (UDP_SKB_CB(skb
)->cscov
< up
->pcrlen
) {
302 LIMIT_NETDEBUG(KERN_WARNING
"UDPLITE6: coverage %d "
303 "too small, need min %d\n",
304 UDP_SKB_CB(skb
)->cscov
, up
->pcrlen
);
310 if (udp_lib_checksum_complete(skb
))
314 if ((rc
= sock_queue_rcv_skb(sk
,skb
)) < 0) {
315 /* Note that an ENOMEM error is charged twice */
317 UDP6_INC_STATS_BH(sock_net(sk
),
318 UDP_MIB_RCVBUFERRORS
, is_udplite
);
319 atomic_inc(&sk
->sk_drops
);
326 UDP6_INC_STATS_BH(sock_net(sk
), UDP_MIB_INERRORS
, is_udplite
);
331 static struct sock
*udp_v6_mcast_next(struct sock
*sk
,
332 __be16 loc_port
, struct in6_addr
*loc_addr
,
333 __be16 rmt_port
, struct in6_addr
*rmt_addr
,
336 struct hlist_node
*node
;
338 unsigned short num
= ntohs(loc_port
);
340 sk_for_each_from(s
, node
) {
341 struct inet_sock
*inet
= inet_sk(s
);
343 if (sock_net(s
) != sock_net(sk
))
346 if (s
->sk_hash
== num
&& s
->sk_family
== PF_INET6
) {
347 struct ipv6_pinfo
*np
= inet6_sk(s
);
349 if (inet
->dport
!= rmt_port
)
352 if (!ipv6_addr_any(&np
->daddr
) &&
353 !ipv6_addr_equal(&np
->daddr
, rmt_addr
))
356 if (s
->sk_bound_dev_if
&& s
->sk_bound_dev_if
!= dif
)
359 if (!ipv6_addr_any(&np
->rcv_saddr
)) {
360 if (!ipv6_addr_equal(&np
->rcv_saddr
, loc_addr
))
363 if (!inet6_mc_check(s
, loc_addr
, rmt_addr
))
372 * Note: called only from the BH handler context,
373 * so we don't need to lock the hashes.
375 static int __udp6_lib_mcast_deliver(struct net
*net
, struct sk_buff
*skb
,
376 struct in6_addr
*saddr
, struct in6_addr
*daddr
,
377 struct hlist_head udptable
[])
379 struct sock
*sk
, *sk2
;
380 const struct udphdr
*uh
= udp_hdr(skb
);
383 read_lock(&udp_hash_lock
);
384 sk
= sk_head(&udptable
[udp_hashfn(net
, ntohs(uh
->dest
))]);
385 dif
= inet6_iif(skb
);
386 sk
= udp_v6_mcast_next(sk
, uh
->dest
, daddr
, uh
->source
, saddr
, dif
);
393 while ((sk2
= udp_v6_mcast_next(sk_next(sk2
), uh
->dest
, daddr
,
394 uh
->source
, saddr
, dif
))) {
395 struct sk_buff
*buff
= skb_clone(skb
, GFP_ATOMIC
);
398 if (!sock_owned_by_user(sk2
))
399 udpv6_queue_rcv_skb(sk2
, buff
);
401 sk_add_backlog(sk2
, buff
);
406 if (!sock_owned_by_user(sk
))
407 udpv6_queue_rcv_skb(sk
, skb
);
409 sk_add_backlog(sk
, skb
);
412 read_unlock(&udp_hash_lock
);
416 static inline int udp6_csum_init(struct sk_buff
*skb
, struct udphdr
*uh
,
421 UDP_SKB_CB(skb
)->partial_cov
= 0;
422 UDP_SKB_CB(skb
)->cscov
= skb
->len
;
424 if (proto
== IPPROTO_UDPLITE
) {
425 err
= udplite_checksum_init(skb
, uh
);
430 if (uh
->check
== 0) {
431 /* RFC 2460 section 8.1 says that we SHOULD log
432 this error. Well, it is reasonable.
434 LIMIT_NETDEBUG(KERN_INFO
"IPv6: udp checksum is 0\n");
437 if (skb
->ip_summed
== CHECKSUM_COMPLETE
&&
438 !csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
, &ipv6_hdr(skb
)->daddr
,
439 skb
->len
, proto
, skb
->csum
))
440 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
442 if (!skb_csum_unnecessary(skb
))
443 skb
->csum
= ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
444 &ipv6_hdr(skb
)->daddr
,
445 skb
->len
, proto
, 0));
450 int __udp6_lib_rcv(struct sk_buff
*skb
, struct hlist_head udptable
[],
455 struct net_device
*dev
= skb
->dev
;
456 struct in6_addr
*saddr
, *daddr
;
458 struct net
*net
= dev_net(skb
->dev
);
460 if (!pskb_may_pull(skb
, sizeof(struct udphdr
)))
463 saddr
= &ipv6_hdr(skb
)->saddr
;
464 daddr
= &ipv6_hdr(skb
)->daddr
;
467 ulen
= ntohs(uh
->len
);
471 if (proto
== IPPROTO_UDP
) {
472 /* UDP validates ulen. */
474 /* Check for jumbo payload */
478 if (ulen
< sizeof(*uh
))
481 if (ulen
< skb
->len
) {
482 if (pskb_trim_rcsum(skb
, ulen
))
484 saddr
= &ipv6_hdr(skb
)->saddr
;
485 daddr
= &ipv6_hdr(skb
)->daddr
;
490 if (udp6_csum_init(skb
, uh
, proto
))
494 * Multicast receive code
496 if (ipv6_addr_is_multicast(daddr
))
497 return __udp6_lib_mcast_deliver(net
, skb
,
498 saddr
, daddr
, udptable
);
503 * check socket cache ... must talk to Alan about his plans
504 * for sock caches... i'll skip this for now.
506 sk
= __udp6_lib_lookup_skb(skb
, uh
->source
, uh
->dest
, udptable
);
509 if (!xfrm6_policy_check(NULL
, XFRM_POLICY_IN
, skb
))
512 if (udp_lib_checksum_complete(skb
))
514 UDP6_INC_STATS_BH(net
, UDP_MIB_NOPORTS
,
515 proto
== IPPROTO_UDPLITE
);
517 icmpv6_send(skb
, ICMPV6_DEST_UNREACH
, ICMPV6_PORT_UNREACH
, 0, dev
);
526 if (!sock_owned_by_user(sk
))
527 udpv6_queue_rcv_skb(sk
, skb
);
529 sk_add_backlog(sk
, skb
);
535 LIMIT_NETDEBUG(KERN_DEBUG
"UDP%sv6: short packet: %d/%u\n",
536 proto
== IPPROTO_UDPLITE
? "-Lite" : "",
540 UDP6_INC_STATS_BH(net
, UDP_MIB_INERRORS
, proto
== IPPROTO_UDPLITE
);
545 static __inline__
int udpv6_rcv(struct sk_buff
*skb
)
547 return __udp6_lib_rcv(skb
, udp_hash
, IPPROTO_UDP
);
551 * Throw away all pending data and cancel the corking. Socket is locked.
553 static void udp_v6_flush_pending_frames(struct sock
*sk
)
555 struct udp_sock
*up
= udp_sk(sk
);
557 if (up
->pending
== AF_INET
)
558 udp_flush_pending_frames(sk
);
559 else if (up
->pending
) {
562 ip6_flush_pending_frames(sk
);
570 static int udp_v6_push_pending_frames(struct sock
*sk
)
574 struct udp_sock
*up
= udp_sk(sk
);
575 struct inet_sock
*inet
= inet_sk(sk
);
576 struct flowi
*fl
= &inet
->cork
.fl
;
578 int is_udplite
= IS_UDPLITE(sk
);
581 /* Grab the skbuff where UDP header space exists. */
582 if ((skb
= skb_peek(&sk
->sk_write_queue
)) == NULL
)
586 * Create a UDP header
589 uh
->source
= fl
->fl_ip_sport
;
590 uh
->dest
= fl
->fl_ip_dport
;
591 uh
->len
= htons(up
->len
);
595 csum
= udplite_csum_outgoing(sk
, skb
);
597 csum
= udp_csum_outgoing(sk
, skb
);
599 /* add protocol-dependent pseudo-header */
600 uh
->check
= csum_ipv6_magic(&fl
->fl6_src
, &fl
->fl6_dst
,
601 up
->len
, fl
->proto
, csum
);
603 uh
->check
= CSUM_MANGLED_0
;
605 err
= ip6_push_pending_frames(sk
);
610 UDP6_INC_STATS_USER(sock_net(sk
),
611 UDP_MIB_OUTDATAGRAMS
, is_udplite
);
615 int udpv6_sendmsg(struct kiocb
*iocb
, struct sock
*sk
,
616 struct msghdr
*msg
, size_t len
)
618 struct ipv6_txoptions opt_space
;
619 struct udp_sock
*up
= udp_sk(sk
);
620 struct inet_sock
*inet
= inet_sk(sk
);
621 struct ipv6_pinfo
*np
= inet6_sk(sk
);
622 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) msg
->msg_name
;
623 struct in6_addr
*daddr
, *final_p
= NULL
, final
;
624 struct ipv6_txoptions
*opt
= NULL
;
625 struct ip6_flowlabel
*flowlabel
= NULL
;
627 struct dst_entry
*dst
;
628 int addr_len
= msg
->msg_namelen
;
632 int corkreq
= up
->corkflag
|| msg
->msg_flags
&MSG_MORE
;
635 int is_udplite
= IS_UDPLITE(sk
);
636 int (*getfrag
)(void *, char *, int, int, int, struct sk_buff
*);
638 /* destination address check */
640 if (addr_len
< offsetof(struct sockaddr
, sa_data
))
643 switch (sin6
->sin6_family
) {
645 if (addr_len
< SIN6_LEN_RFC2133
)
647 daddr
= &sin6
->sin6_addr
;
652 msg
->msg_name
= sin6
= NULL
;
653 msg
->msg_namelen
= addr_len
= 0;
659 } else if (!up
->pending
) {
660 if (sk
->sk_state
!= TCP_ESTABLISHED
)
661 return -EDESTADDRREQ
;
667 if (ipv6_addr_v4mapped(daddr
)) {
668 struct sockaddr_in sin
;
669 sin
.sin_family
= AF_INET
;
670 sin
.sin_port
= sin6
? sin6
->sin6_port
: inet
->dport
;
671 sin
.sin_addr
.s_addr
= daddr
->s6_addr32
[3];
672 msg
->msg_name
= &sin
;
673 msg
->msg_namelen
= sizeof(sin
);
675 if (__ipv6_only_sock(sk
))
677 return udp_sendmsg(iocb
, sk
, msg
, len
);
681 if (up
->pending
== AF_INET
)
682 return udp_sendmsg(iocb
, sk
, msg
, len
);
684 /* Rough check on arithmetic overflow,
685 better check is made in ip6_append_data().
687 if (len
> INT_MAX
- sizeof(struct udphdr
))
692 * There are pending frames.
693 * The socket lock must be held while it's corked.
696 if (likely(up
->pending
)) {
697 if (unlikely(up
->pending
!= AF_INET6
)) {
699 return -EAFNOSUPPORT
;
706 ulen
+= sizeof(struct udphdr
);
708 memset(&fl
, 0, sizeof(fl
));
711 if (sin6
->sin6_port
== 0)
714 fl
.fl_ip_dport
= sin6
->sin6_port
;
715 daddr
= &sin6
->sin6_addr
;
718 fl
.fl6_flowlabel
= sin6
->sin6_flowinfo
&IPV6_FLOWINFO_MASK
;
719 if (fl
.fl6_flowlabel
&IPV6_FLOWLABEL_MASK
) {
720 flowlabel
= fl6_sock_lookup(sk
, fl
.fl6_flowlabel
);
721 if (flowlabel
== NULL
)
723 daddr
= &flowlabel
->dst
;
728 * Otherwise it will be difficult to maintain
731 if (sk
->sk_state
== TCP_ESTABLISHED
&&
732 ipv6_addr_equal(daddr
, &np
->daddr
))
735 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
736 sin6
->sin6_scope_id
&&
737 ipv6_addr_type(daddr
)&IPV6_ADDR_LINKLOCAL
)
738 fl
.oif
= sin6
->sin6_scope_id
;
740 if (sk
->sk_state
!= TCP_ESTABLISHED
)
741 return -EDESTADDRREQ
;
743 fl
.fl_ip_dport
= inet
->dport
;
745 fl
.fl6_flowlabel
= np
->flow_label
;
750 fl
.oif
= sk
->sk_bound_dev_if
;
752 if (msg
->msg_controllen
) {
754 memset(opt
, 0, sizeof(struct ipv6_txoptions
));
755 opt
->tot_len
= sizeof(*opt
);
757 err
= datagram_send_ctl(sock_net(sk
), msg
, &fl
, opt
, &hlimit
, &tclass
);
759 fl6_sock_release(flowlabel
);
762 if ((fl
.fl6_flowlabel
&IPV6_FLOWLABEL_MASK
) && !flowlabel
) {
763 flowlabel
= fl6_sock_lookup(sk
, fl
.fl6_flowlabel
);
764 if (flowlabel
== NULL
)
767 if (!(opt
->opt_nflen
|opt
->opt_flen
))
774 opt
= fl6_merge_options(&opt_space
, flowlabel
, opt
);
775 opt
= ipv6_fixup_options(&opt_space
, opt
);
777 fl
.proto
= sk
->sk_protocol
;
778 if (!ipv6_addr_any(daddr
))
779 ipv6_addr_copy(&fl
.fl6_dst
, daddr
);
781 fl
.fl6_dst
.s6_addr
[15] = 0x1; /* :: means loopback (BSD'ism) */
782 if (ipv6_addr_any(&fl
.fl6_src
) && !ipv6_addr_any(&np
->saddr
))
783 ipv6_addr_copy(&fl
.fl6_src
, &np
->saddr
);
784 fl
.fl_ip_sport
= inet
->sport
;
786 /* merge ip6_build_xmit from ip6_output */
787 if (opt
&& opt
->srcrt
) {
788 struct rt0_hdr
*rt0
= (struct rt0_hdr
*) opt
->srcrt
;
789 ipv6_addr_copy(&final
, &fl
.fl6_dst
);
790 ipv6_addr_copy(&fl
.fl6_dst
, rt0
->addr
);
795 if (!fl
.oif
&& ipv6_addr_is_multicast(&fl
.fl6_dst
)) {
796 fl
.oif
= np
->mcast_oif
;
800 security_sk_classify_flow(sk
, &fl
);
802 err
= ip6_sk_dst_lookup(sk
, &dst
, &fl
);
806 ipv6_addr_copy(&fl
.fl6_dst
, final_p
);
808 if ((err
= __xfrm_lookup(&dst
, &fl
, sk
, XFRM_LOOKUP_WAIT
)) < 0) {
810 err
= ip6_dst_blackhole(sk
, &dst
, &fl
);
816 if (ipv6_addr_is_multicast(&fl
.fl6_dst
))
817 hlimit
= np
->mcast_hops
;
819 hlimit
= np
->hop_limit
;
821 hlimit
= ip6_dst_hoplimit(dst
);
830 if (msg
->msg_flags
&MSG_CONFIRM
)
835 if (unlikely(up
->pending
)) {
836 /* The socket is already corked while preparing it. */
837 /* ... which is an evident application bug. --ANK */
840 LIMIT_NETDEBUG(KERN_DEBUG
"udp cork app bug 2\n");
845 up
->pending
= AF_INET6
;
849 getfrag
= is_udplite
? udplite_getfrag
: ip_generic_getfrag
;
850 err
= ip6_append_data(sk
, getfrag
, msg
->msg_iov
, ulen
,
851 sizeof(struct udphdr
), hlimit
, tclass
, opt
, &fl
,
852 (struct rt6_info
*)dst
,
853 corkreq
? msg
->msg_flags
|MSG_MORE
: msg
->msg_flags
);
855 udp_v6_flush_pending_frames(sk
);
857 err
= udp_v6_push_pending_frames(sk
);
858 else if (unlikely(skb_queue_empty(&sk
->sk_write_queue
)))
863 ip6_dst_store(sk
, dst
,
864 ipv6_addr_equal(&fl
.fl6_dst
, &np
->daddr
) ?
866 #ifdef CONFIG_IPV6_SUBTREES
867 ipv6_addr_equal(&fl
.fl6_src
, &np
->saddr
) ?
878 err
= np
->recverr
? net_xmit_errno(err
) : 0;
882 fl6_sock_release(flowlabel
);
886 * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
887 * ENOBUFS might not be good (it's not tunable per se), but otherwise
888 * we don't have a good statistic (IpOutDiscards but it can be too many
889 * things). We could add another new stat but at least for now that
890 * seems like overkill.
892 if (err
== -ENOBUFS
|| test_bit(SOCK_NOSPACE
, &sk
->sk_socket
->flags
)) {
893 UDP6_INC_STATS_USER(sock_net(sk
),
894 UDP_MIB_SNDBUFERRORS
, is_udplite
);
900 if (!(msg
->msg_flags
&MSG_PROBE
) || len
)
901 goto back_from_confirm
;
906 void udpv6_destroy_sock(struct sock
*sk
)
909 udp_v6_flush_pending_frames(sk
);
912 inet6_destroy_sock(sk
);
916 * Socket option code for UDP
918 int udpv6_setsockopt(struct sock
*sk
, int level
, int optname
,
919 char __user
*optval
, int optlen
)
921 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
922 return udp_lib_setsockopt(sk
, level
, optname
, optval
, optlen
,
923 udp_v6_push_pending_frames
);
924 return ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
928 int compat_udpv6_setsockopt(struct sock
*sk
, int level
, int optname
,
929 char __user
*optval
, int optlen
)
931 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
932 return udp_lib_setsockopt(sk
, level
, optname
, optval
, optlen
,
933 udp_v6_push_pending_frames
);
934 return compat_ipv6_setsockopt(sk
, level
, optname
, optval
, optlen
);
938 int udpv6_getsockopt(struct sock
*sk
, int level
, int optname
,
939 char __user
*optval
, int __user
*optlen
)
941 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
942 return udp_lib_getsockopt(sk
, level
, optname
, optval
, optlen
);
943 return ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
947 int compat_udpv6_getsockopt(struct sock
*sk
, int level
, int optname
,
948 char __user
*optval
, int __user
*optlen
)
950 if (level
== SOL_UDP
|| level
== SOL_UDPLITE
)
951 return udp_lib_getsockopt(sk
, level
, optname
, optval
, optlen
);
952 return compat_ipv6_getsockopt(sk
, level
, optname
, optval
, optlen
);
956 static struct inet6_protocol udpv6_protocol
= {
957 .handler
= udpv6_rcv
,
958 .err_handler
= udpv6_err
,
959 .flags
= INET6_PROTO_NOPOLICY
|INET6_PROTO_FINAL
,
962 /* ------------------------------------------------------------------------ */
963 #ifdef CONFIG_PROC_FS
965 static void udp6_sock_seq_show(struct seq_file
*seq
, struct sock
*sp
, int bucket
)
967 struct inet_sock
*inet
= inet_sk(sp
);
968 struct ipv6_pinfo
*np
= inet6_sk(sp
);
969 struct in6_addr
*dest
, *src
;
973 src
= &np
->rcv_saddr
;
974 destp
= ntohs(inet
->dport
);
975 srcp
= ntohs(inet
->sport
);
977 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
978 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
980 src
->s6_addr32
[0], src
->s6_addr32
[1],
981 src
->s6_addr32
[2], src
->s6_addr32
[3], srcp
,
982 dest
->s6_addr32
[0], dest
->s6_addr32
[1],
983 dest
->s6_addr32
[2], dest
->s6_addr32
[3], destp
,
985 atomic_read(&sp
->sk_wmem_alloc
),
986 atomic_read(&sp
->sk_rmem_alloc
),
990 atomic_read(&sp
->sk_refcnt
), sp
,
991 atomic_read(&sp
->sk_drops
));
994 int udp6_seq_show(struct seq_file
*seq
, void *v
)
996 if (v
== SEQ_START_TOKEN
)
1001 "st tx_queue rx_queue tr tm->when retrnsmt"
1002 " uid timeout inode ref pointer drops\n");
1004 udp6_sock_seq_show(seq
, v
, ((struct udp_iter_state
*)seq
->private)->bucket
);
1008 static struct udp_seq_afinfo udp6_seq_afinfo
= {
1011 .hashtable
= udp_hash
,
1013 .owner
= THIS_MODULE
,
1016 .show
= udp6_seq_show
,
1020 int udp6_proc_init(struct net
*net
)
1022 return udp_proc_register(net
, &udp6_seq_afinfo
);
1025 void udp6_proc_exit(struct net
*net
) {
1026 udp_proc_unregister(net
, &udp6_seq_afinfo
);
1028 #endif /* CONFIG_PROC_FS */
1030 /* ------------------------------------------------------------------------ */
1032 struct proto udpv6_prot
= {
1034 .owner
= THIS_MODULE
,
1035 .close
= udp_lib_close
,
1036 .connect
= ip6_datagram_connect
,
1037 .disconnect
= udp_disconnect
,
1039 .destroy
= udpv6_destroy_sock
,
1040 .setsockopt
= udpv6_setsockopt
,
1041 .getsockopt
= udpv6_getsockopt
,
1042 .sendmsg
= udpv6_sendmsg
,
1043 .recvmsg
= udpv6_recvmsg
,
1044 .backlog_rcv
= udpv6_queue_rcv_skb
,
1045 .hash
= udp_lib_hash
,
1046 .unhash
= udp_lib_unhash
,
1047 .get_port
= udp_v6_get_port
,
1048 .memory_allocated
= &udp_memory_allocated
,
1049 .sysctl_mem
= sysctl_udp_mem
,
1050 .sysctl_wmem
= &sysctl_udp_wmem_min
,
1051 .sysctl_rmem
= &sysctl_udp_rmem_min
,
1052 .obj_size
= sizeof(struct udp6_sock
),
1053 .h
.udp_hash
= udp_hash
,
1054 #ifdef CONFIG_COMPAT
1055 .compat_setsockopt
= compat_udpv6_setsockopt
,
1056 .compat_getsockopt
= compat_udpv6_getsockopt
,
1060 static struct inet_protosw udpv6_protosw
= {
1062 .protocol
= IPPROTO_UDP
,
1063 .prot
= &udpv6_prot
,
1064 .ops
= &inet6_dgram_ops
,
1066 .no_check
= UDP_CSUM_DEFAULT
,
1067 .flags
= INET_PROTOSW_PERMANENT
,
1071 int __init
udpv6_init(void)
1075 ret
= inet6_add_protocol(&udpv6_protocol
, IPPROTO_UDP
);
1079 ret
= inet6_register_protosw(&udpv6_protosw
);
1081 goto out_udpv6_protocol
;
1086 inet6_del_protocol(&udpv6_protocol
, IPPROTO_UDP
);
1090 void udpv6_exit(void)
1092 inet6_unregister_protosw(&udpv6_protosw
);
1093 inet6_del_protocol(&udpv6_protocol
, IPPROTO_UDP
);