3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Adapted from linux/net/ipv4/raw.c
10 * $Id: raw.c,v 1.51 2002/02/01 22:01:04 davem Exp $
13 * Hideaki YOSHIFUJI : sin6_scope_id support
14 * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance)
15 * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version
20 * 2 of the License, or (at your option) any later version.
23 #include <linux/errno.h>
24 #include <linux/types.h>
25 #include <linux/socket.h>
26 #include <linux/sockios.h>
27 #include <linux/sched.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/icmpv6.h>
33 #include <linux/netfilter.h>
34 #include <linux/netfilter_ipv6.h>
35 #include <linux/skbuff.h>
36 #include <asm/uaccess.h>
37 #include <asm/ioctls.h>
44 #include <net/ndisc.h>
45 #include <net/protocol.h>
46 #include <net/ip6_route.h>
47 #include <net/ip6_checksum.h>
48 #include <net/addrconf.h>
49 #include <net/transp_v6.h>
51 #include <net/inet_common.h>
52 #include <net/tcp_states.h>
53 #ifdef CONFIG_IPV6_MIP6
57 #include <net/rawv6.h>
60 #include <linux/proc_fs.h>
61 #include <linux/seq_file.h>
63 struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
64 DEFINE_RWLOCK(raw_v6_lock);
66 static void raw_v6_hash(struct sock *sk)
68 struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num &
69 (RAWV6_HTABLE_SIZE - 1)];
71 write_lock_bh(&raw_v6_lock);
72 sk_add_node(sk, list);
73 sock_prot_inc_use(sk->sk_prot);
74 write_unlock_bh(&raw_v6_lock);
77 static void raw_v6_unhash(struct sock *sk)
79 write_lock_bh(&raw_v6_lock);
80 if (sk_del_node_init(sk))
81 sock_prot_dec_use(sk->sk_prot);
82 write_unlock_bh(&raw_v6_lock);
86 /* Grumble... icmp and ip_input want to get at this... */
87 struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
88 struct in6_addr *loc_addr, struct in6_addr *rmt_addr,
91 struct hlist_node *node;
92 int is_multicast = ipv6_addr_is_multicast(loc_addr);
94 sk_for_each_from(sk, node)
95 if (inet_sk(sk)->num == num) {
96 struct ipv6_pinfo *np = inet6_sk(sk);
98 if (!ipv6_addr_any(&np->daddr) &&
99 !ipv6_addr_equal(&np->daddr, rmt_addr))
102 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
105 if (!ipv6_addr_any(&np->rcv_saddr)) {
106 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
109 inet6_mc_check(sk, loc_addr, rmt_addr))
124 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
126 struct icmp6hdr *icmph;
127 struct raw6_sock *rp = raw6_sk(sk);
129 if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
130 __u32 *data = &rp->filter.data[0];
133 icmph = (struct icmp6hdr *) skb->data;
134 bit_nr = icmph->icmp6_type;
136 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
142 * demultiplex raw sockets.
143 * (should consider queueing the skb in the sock receive_queue
144 * without calling rawv6.c)
146 * Caller owns SKB so we must make clones.
148 int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
150 struct in6_addr *saddr;
151 struct in6_addr *daddr;
156 saddr = &skb->nh.ipv6h->saddr;
159 hash = nexthdr & (MAX_INET_PROTOS - 1);
161 read_lock(&raw_v6_lock);
162 sk = sk_head(&raw_v6_htable[hash]);
165 * The first socket found will be delivered after
166 * delivery to transport protocols.
172 sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
180 filtered = icmpv6_filter(sk, skb);
182 #ifdef CONFIG_IPV6_MIP6
184 /* XXX: To validate MH only once for each packet,
185 * this is placed here. It should be after checking
186 * xfrm policy, however it doesn't. The checking xfrm
187 * policy is placed in rawv6_rcv() because it is
188 * required for each socket.
190 filtered = mip6_mh_filter(sk, skb);
201 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
203 /* Not releasing hash table! */
206 rawv6_rcv(sk, clone);
209 sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr,
213 read_unlock(&raw_v6_lock);
217 /* This cleans up af_inet6 a bit. -DaveM */
218 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
220 struct inet_sock *inet = inet_sk(sk);
221 struct ipv6_pinfo *np = inet6_sk(sk);
222 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
227 if (addr_len < SIN6_LEN_RFC2133)
229 addr_type = ipv6_addr_type(&addr->sin6_addr);
231 /* Raw sockets are IPv6 only */
232 if (addr_type == IPV6_ADDR_MAPPED)
233 return(-EADDRNOTAVAIL);
238 if (sk->sk_state != TCP_CLOSE)
241 /* Check if the address belongs to the host. */
242 if (addr_type != IPV6_ADDR_ANY) {
243 struct net_device *dev = NULL;
245 if (addr_type & IPV6_ADDR_LINKLOCAL) {
246 if (addr_len >= sizeof(struct sockaddr_in6) &&
247 addr->sin6_scope_id) {
248 /* Override any existing binding, if another
249 * one is supplied by user.
251 sk->sk_bound_dev_if = addr->sin6_scope_id;
254 /* Binding to link-local address requires an interface */
255 if (!sk->sk_bound_dev_if)
258 dev = dev_get_by_index(sk->sk_bound_dev_if);
265 /* ipv4 addr of the socket is invalid. Only the
266 * unspecified and mapped address have a v4 equivalent.
268 v4addr = LOOPBACK4_IPV6;
269 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
270 err = -EADDRNOTAVAIL;
271 if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
281 inet->rcv_saddr = inet->saddr = v4addr;
282 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
283 if (!(addr_type & IPV6_ADDR_MULTICAST))
284 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
291 void rawv6_err(struct sock *sk, struct sk_buff *skb,
292 struct inet6_skb_parm *opt,
293 int type, int code, int offset, __be32 info)
295 struct inet_sock *inet = inet_sk(sk);
296 struct ipv6_pinfo *np = inet6_sk(sk);
300 /* Report error on raw socket, if:
301 1. User requested recverr.
302 2. Socket is connected (otherwise the error indication
303 is useless without recverr and error is hard.
305 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
308 harderr = icmpv6_err_convert(type, code, &err);
309 if (type == ICMPV6_PKT_TOOBIG)
310 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
313 u8 *payload = skb->data;
316 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
319 if (np->recverr || harderr) {
321 sk->sk_error_report(sk);
325 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
327 if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
328 skb_checksum_complete(skb)) {
329 /* FIXME: increment a raw6 drops counter here */
334 /* Charge it to the socket. */
335 if (sock_queue_rcv_skb(sk,skb)<0) {
336 /* FIXME: increment a raw6 drops counter here */
345 * This is next to useless...
346 * if we demultiplex in network layer we don't need the extra call
347 * just to queue the skb...
348 * maybe we could have the network decide upon a hint if it
349 * should call raw_rcv for demultiplexing
351 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
353 struct inet_sock *inet = inet_sk(sk);
354 struct raw6_sock *rp = raw6_sk(sk);
356 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
362 skb->ip_summed = CHECKSUM_UNNECESSARY;
364 if (skb->ip_summed == CHECKSUM_COMPLETE) {
365 skb_postpull_rcsum(skb, skb->nh.raw,
366 skb->h.raw - skb->nh.raw);
367 if (!csum_ipv6_magic(&skb->nh.ipv6h->saddr,
368 &skb->nh.ipv6h->daddr,
369 skb->len, inet->num, skb->csum))
370 skb->ip_summed = CHECKSUM_UNNECESSARY;
372 if (skb->ip_summed != CHECKSUM_UNNECESSARY)
373 skb->csum = ~csum_unfold(csum_ipv6_magic(&skb->nh.ipv6h->saddr,
374 &skb->nh.ipv6h->daddr,
375 skb->len, inet->num, 0));
378 if (skb_checksum_complete(skb)) {
379 /* FIXME: increment a raw6 drops counter here */
385 rawv6_rcv_skb(sk, skb);
391 * This should be easy, if there is something there
392 * we return it, otherwise we block.
395 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
396 struct msghdr *msg, size_t len,
397 int noblock, int flags, int *addr_len)
399 struct ipv6_pinfo *np = inet6_sk(sk);
400 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
409 *addr_len=sizeof(*sin6);
411 if (flags & MSG_ERRQUEUE)
412 return ipv6_recv_error(sk, msg, len);
414 skb = skb_recv_datagram(sk, flags, noblock, &err);
421 msg->msg_flags |= MSG_TRUNC;
424 if (skb->ip_summed==CHECKSUM_UNNECESSARY) {
425 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
426 } else if (msg->msg_flags&MSG_TRUNC) {
427 if (__skb_checksum_complete(skb))
429 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
431 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
438 /* Copy the address. */
440 sin6->sin6_family = AF_INET6;
442 ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr);
443 sin6->sin6_flowinfo = 0;
444 sin6->sin6_scope_id = 0;
445 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
446 sin6->sin6_scope_id = IP6CB(skb)->iif;
449 sock_recv_timestamp(msg, sk, skb);
452 datagram_recv_ctl(sk, msg, skb);
455 if (flags & MSG_TRUNC)
459 skb_free_datagram(sk, skb);
464 skb_kill_datagram(sk, skb, flags);
466 /* Error for blocking case is chosen to masquerade
467 as some normal condition.
469 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
470 /* FIXME: increment a raw6 drops counter here */
474 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
475 struct raw6_sock *rp)
488 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
492 total_len = inet_sk(sk)->cork.length - (skb->nh.raw - skb->data);
493 if (offset >= total_len - 1) {
495 ip6_flush_pending_frames(sk);
499 /* should be check HW csum miyazawa */
500 if (skb_queue_len(&sk->sk_write_queue) == 1) {
502 * Only one fragment on the socket.
504 tmp_csum = skb->csum;
506 struct sk_buff *csum_skb = NULL;
509 skb_queue_walk(&sk->sk_write_queue, skb) {
510 tmp_csum = csum_add(tmp_csum, skb->csum);
515 len = skb->len - (skb->h.raw - skb->data);
527 offset += skb->h.raw - skb->data;
528 if (skb_copy_bits(skb, offset, &csum, 2))
531 /* in case cksum was not initialized */
533 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
535 csum = csum_ipv6_magic(&fl->fl6_src,
537 total_len, fl->proto, tmp_csum);
539 if (csum == 0 && fl->proto == IPPROTO_UDP)
540 csum = CSUM_MANGLED_0;
542 if (skb_store_bits(skb, offset, &csum, 2))
546 err = ip6_push_pending_frames(sk);
551 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
552 struct flowi *fl, struct rt6_info *rt,
555 struct ipv6_pinfo *np = inet6_sk(sk);
561 if (length > rt->u.dst.dev->mtu) {
562 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
568 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
570 skb = sock_alloc_send_skb(sk, length+hh_len+15,
571 flags&MSG_DONTWAIT, &err);
574 skb_reserve(skb, hh_len);
576 skb->priority = sk->sk_priority;
577 skb->dst = dst_clone(&rt->u.dst);
579 skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length);
581 skb->ip_summed = CHECKSUM_NONE;
583 skb->h.raw = skb->nh.raw;
584 err = memcpy_fromiovecend((void *)iph, from, 0, length);
588 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
589 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
592 err = np->recverr ? net_xmit_errno(err) : 0;
602 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
606 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
609 u8 __user *type = NULL;
610 u8 __user *code = NULL;
611 #ifdef CONFIG_IPV6_MIP6
620 for (i = 0; i < msg->msg_iovlen; i++) {
621 iov = &msg->msg_iov[i];
627 /* check if one-byte field is readable or not. */
628 if (iov->iov_base && iov->iov_len < 1)
632 type = iov->iov_base;
633 /* check if code field is readable or not. */
634 if (iov->iov_len > 1)
637 code = iov->iov_base;
640 if (get_user(fl->fl_icmp_type, type) ||
641 get_user(fl->fl_icmp_code, code))
646 #ifdef CONFIG_IPV6_MIP6
648 if (iov->iov_base && iov->iov_len < 1)
650 /* check if type field is readable or not. */
651 if (iov->iov_len > 2 - len) {
652 u8 __user *p = iov->iov_base;
653 if (get_user(fl->fl_mh_type, &p[2 - len]))
671 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
672 struct msghdr *msg, size_t len)
674 struct ipv6_txoptions opt_space;
675 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
676 struct in6_addr *daddr, *final_p = NULL, final;
677 struct inet_sock *inet = inet_sk(sk);
678 struct ipv6_pinfo *np = inet6_sk(sk);
679 struct raw6_sock *rp = raw6_sk(sk);
680 struct ipv6_txoptions *opt = NULL;
681 struct ip6_flowlabel *flowlabel = NULL;
682 struct dst_entry *dst = NULL;
684 int addr_len = msg->msg_namelen;
690 /* Rough check on arithmetic overflow,
691 better check is made in ip6_build_xmit
696 /* Mirror BSD error message compatibility */
697 if (msg->msg_flags & MSG_OOB)
701 * Get and verify the address.
703 memset(&fl, 0, sizeof(fl));
706 if (addr_len < SIN6_LEN_RFC2133)
709 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
710 return(-EAFNOSUPPORT);
712 /* port is the proto value [0..255] carried in nexthdr */
713 proto = ntohs(sin6->sin6_port);
717 else if (proto != inet->num)
723 daddr = &sin6->sin6_addr;
725 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
726 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
727 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
728 if (flowlabel == NULL)
730 daddr = &flowlabel->dst;
735 * Otherwise it will be difficult to maintain
738 if (sk->sk_state == TCP_ESTABLISHED &&
739 ipv6_addr_equal(daddr, &np->daddr))
742 if (addr_len >= sizeof(struct sockaddr_in6) &&
743 sin6->sin6_scope_id &&
744 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
745 fl.oif = sin6->sin6_scope_id;
747 if (sk->sk_state != TCP_ESTABLISHED)
748 return -EDESTADDRREQ;
752 fl.fl6_flowlabel = np->flow_label;
755 if (ipv6_addr_any(daddr)) {
757 * unspecified destination address
758 * treated as error... is this correct ?
760 fl6_sock_release(flowlabel);
765 fl.oif = sk->sk_bound_dev_if;
767 if (msg->msg_controllen) {
769 memset(opt, 0, sizeof(struct ipv6_txoptions));
770 opt->tot_len = sizeof(struct ipv6_txoptions);
772 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
774 fl6_sock_release(flowlabel);
777 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
778 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
779 if (flowlabel == NULL)
782 if (!(opt->opt_nflen|opt->opt_flen))
788 opt = fl6_merge_options(&opt_space, flowlabel, opt);
789 opt = ipv6_fixup_options(&opt_space, opt);
792 err = rawv6_probe_proto_opt(&fl, msg);
796 ipv6_addr_copy(&fl.fl6_dst, daddr);
797 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
798 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
800 /* merge ip6_build_xmit from ip6_output */
801 if (opt && opt->srcrt) {
802 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
803 ipv6_addr_copy(&final, &fl.fl6_dst);
804 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
808 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
809 fl.oif = np->mcast_oif;
810 security_sk_classify_flow(sk, &fl);
812 err = ip6_dst_lookup(sk, &dst, &fl);
816 ipv6_addr_copy(&fl.fl6_dst, final_p);
818 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
822 if (ipv6_addr_is_multicast(&fl.fl6_dst))
823 hlimit = np->mcast_hops;
825 hlimit = np->hop_limit;
827 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
829 hlimit = ipv6_get_hoplimit(dst->dev);
838 if (msg->msg_flags&MSG_CONFIRM)
843 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
846 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
847 len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
851 ip6_flush_pending_frames(sk);
852 else if (!(msg->msg_flags & MSG_MORE))
853 err = rawv6_push_pending_frames(sk, &fl, rp);
859 fl6_sock_release(flowlabel);
860 return err<0?err:len;
863 if (!(msg->msg_flags & MSG_PROBE) || len)
864 goto back_from_confirm;
869 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
870 char __user *optval, int optlen)
874 if (optlen > sizeof(struct icmp6_filter))
875 optlen = sizeof(struct icmp6_filter);
876 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
886 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
887 char __user *optval, int __user *optlen)
893 if (get_user(len, optlen))
897 if (len > sizeof(struct icmp6_filter))
898 len = sizeof(struct icmp6_filter);
899 if (put_user(len, optlen))
901 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
912 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
913 char __user *optval, int optlen)
915 struct raw6_sock *rp = raw6_sk(sk);
918 if (get_user(val, (int __user *)optval))
923 /* You may get strange result with a positive odd offset;
924 RFC2292bis agrees with me. */
925 if (val > 0 && (val&1))
938 return(-ENOPROTOOPT);
942 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
943 char __user *optval, int optlen)
950 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
952 return rawv6_seticmpfilter(sk, level, optname, optval,
955 if (optname == IPV6_CHECKSUM)
958 return ipv6_setsockopt(sk, level, optname, optval,
961 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
965 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
966 char __user *optval, int optlen)
972 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
974 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
976 if (optname == IPV6_CHECKSUM)
979 return compat_ipv6_setsockopt(sk, level, optname,
982 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
986 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
987 char __user *optval, int __user *optlen)
989 struct raw6_sock *rp = raw6_sk(sk);
992 if (get_user(len,optlen))
997 if (rp->checksum == 0)
1004 return -ENOPROTOOPT;
1007 len = min_t(unsigned int, sizeof(int), len);
1009 if (put_user(len, optlen))
1011 if (copy_to_user(optval,&val,len))
1016 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1017 char __user *optval, int __user *optlen)
1024 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1026 return rawv6_geticmpfilter(sk, level, optname, optval,
1029 if (optname == IPV6_CHECKSUM)
1032 return ipv6_getsockopt(sk, level, optname, optval,
1035 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1038 #ifdef CONFIG_COMPAT
1039 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1040 char __user *optval, int __user *optlen)
1046 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1048 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1050 if (optname == IPV6_CHECKSUM)
1053 return compat_ipv6_getsockopt(sk, level, optname,
1056 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1060 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1065 int amount = atomic_read(&sk->sk_wmem_alloc);
1066 return put_user(amount, (int __user *)arg);
1070 struct sk_buff *skb;
1073 spin_lock_bh(&sk->sk_receive_queue.lock);
1074 skb = skb_peek(&sk->sk_receive_queue);
1076 amount = skb->tail - skb->h.raw;
1077 spin_unlock_bh(&sk->sk_receive_queue.lock);
1078 return put_user(amount, (int __user *)arg);
1082 return -ENOIOCTLCMD;
1086 static void rawv6_close(struct sock *sk, long timeout)
1088 if (inet_sk(sk)->num == IPPROTO_RAW)
1089 ip6_ra_control(sk, -1, NULL);
1091 sk_common_release(sk);
1094 static int rawv6_init_sk(struct sock *sk)
1096 if (inet_sk(sk)->num == IPPROTO_ICMPV6) {
1097 struct raw6_sock *rp = raw6_sk(sk);
1104 struct proto rawv6_prot = {
1106 .owner = THIS_MODULE,
1107 .close = rawv6_close,
1108 .connect = ip6_datagram_connect,
1109 .disconnect = udp_disconnect,
1110 .ioctl = rawv6_ioctl,
1111 .init = rawv6_init_sk,
1112 .destroy = inet6_destroy_sock,
1113 .setsockopt = rawv6_setsockopt,
1114 .getsockopt = rawv6_getsockopt,
1115 .sendmsg = rawv6_sendmsg,
1116 .recvmsg = rawv6_recvmsg,
1118 .backlog_rcv = rawv6_rcv_skb,
1119 .hash = raw_v6_hash,
1120 .unhash = raw_v6_unhash,
1121 .obj_size = sizeof(struct raw6_sock),
1122 #ifdef CONFIG_COMPAT
1123 .compat_setsockopt = compat_rawv6_setsockopt,
1124 .compat_getsockopt = compat_rawv6_getsockopt,
1128 #ifdef CONFIG_PROC_FS
1129 struct raw6_iter_state {
1133 #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private)
1135 static struct sock *raw6_get_first(struct seq_file *seq)
1138 struct hlist_node *node;
1139 struct raw6_iter_state* state = raw6_seq_private(seq);
1141 for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket)
1142 sk_for_each(sk, node, &raw_v6_htable[state->bucket])
1143 if (sk->sk_family == PF_INET6)
1150 static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk)
1152 struct raw6_iter_state* state = raw6_seq_private(seq);
1158 } while (sk && sk->sk_family != PF_INET6);
1160 if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) {
1161 sk = sk_head(&raw_v6_htable[state->bucket]);
1167 static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos)
1169 struct sock *sk = raw6_get_first(seq);
1171 while (pos && (sk = raw6_get_next(seq, sk)) != NULL)
1173 return pos ? NULL : sk;
1176 static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
1178 read_lock(&raw_v6_lock);
1179 return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
1182 static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1186 if (v == SEQ_START_TOKEN)
1187 sk = raw6_get_first(seq);
1189 sk = raw6_get_next(seq, v);
1194 static void raw6_seq_stop(struct seq_file *seq, void *v)
1196 read_unlock(&raw_v6_lock);
1199 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1201 struct ipv6_pinfo *np = inet6_sk(sp);
1202 struct in6_addr *dest, *src;
1206 src = &np->rcv_saddr;
1208 srcp = inet_sk(sp)->num;
1210 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1211 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
1213 src->s6_addr32[0], src->s6_addr32[1],
1214 src->s6_addr32[2], src->s6_addr32[3], srcp,
1215 dest->s6_addr32[0], dest->s6_addr32[1],
1216 dest->s6_addr32[2], dest->s6_addr32[3], destp,
1218 atomic_read(&sp->sk_wmem_alloc),
1219 atomic_read(&sp->sk_rmem_alloc),
1223 atomic_read(&sp->sk_refcnt), sp);
1226 static int raw6_seq_show(struct seq_file *seq, void *v)
1228 if (v == SEQ_START_TOKEN)
1233 "st tx_queue rx_queue tr tm->when retrnsmt"
1234 " uid timeout inode\n");
1236 raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket);
1240 static struct seq_operations raw6_seq_ops = {
1241 .start = raw6_seq_start,
1242 .next = raw6_seq_next,
1243 .stop = raw6_seq_stop,
1244 .show = raw6_seq_show,
1247 static int raw6_seq_open(struct inode *inode, struct file *file)
1249 struct seq_file *seq;
1251 struct raw6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
1254 rc = seq_open(file, &raw6_seq_ops);
1257 seq = file->private_data;
1266 static struct file_operations raw6_seq_fops = {
1267 .owner = THIS_MODULE,
1268 .open = raw6_seq_open,
1270 .llseek = seq_lseek,
1271 .release = seq_release_private,
1274 int __init raw6_proc_init(void)
1276 if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops))
1281 void raw6_proc_exit(void)
1283 proc_net_remove("raw6");
1285 #endif /* CONFIG_PROC_FS */