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/net.h>
28 #include <linux/in6.h>
29 #include <linux/netdevice.h>
30 #include <linux/if_arp.h>
31 #include <linux/icmpv6.h>
32 #include <linux/netfilter.h>
33 #include <linux/netfilter_ipv6.h>
34 #include <linux/skbuff.h>
35 #include <asm/uaccess.h>
36 #include <asm/ioctls.h>
43 #include <net/ndisc.h>
44 #include <net/protocol.h>
45 #include <net/ip6_route.h>
46 #include <net/ip6_checksum.h>
47 #include <net/addrconf.h>
48 #include <net/transp_v6.h>
50 #include <net/inet_common.h>
51 #include <net/tcp_states.h>
52 #ifdef CONFIG_IPV6_MIP6
56 #include <net/rawv6.h>
59 #include <linux/proc_fs.h>
60 #include <linux/seq_file.h>
62 struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
63 DEFINE_RWLOCK(raw_v6_lock);
65 static void raw_v6_hash(struct sock *sk)
67 struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num &
68 (RAWV6_HTABLE_SIZE - 1)];
70 write_lock_bh(&raw_v6_lock);
71 sk_add_node(sk, list);
72 sock_prot_inc_use(sk->sk_prot);
73 write_unlock_bh(&raw_v6_lock);
76 static void raw_v6_unhash(struct sock *sk)
78 write_lock_bh(&raw_v6_lock);
79 if (sk_del_node_init(sk))
80 sock_prot_dec_use(sk->sk_prot);
81 write_unlock_bh(&raw_v6_lock);
85 /* Grumble... icmp and ip_input want to get at this... */
86 struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
87 struct in6_addr *loc_addr, struct in6_addr *rmt_addr,
90 struct hlist_node *node;
91 int is_multicast = ipv6_addr_is_multicast(loc_addr);
93 sk_for_each_from(sk, node)
94 if (inet_sk(sk)->num == num) {
95 struct ipv6_pinfo *np = inet6_sk(sk);
97 if (!ipv6_addr_any(&np->daddr) &&
98 !ipv6_addr_equal(&np->daddr, rmt_addr))
101 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
104 if (!ipv6_addr_any(&np->rcv_saddr)) {
105 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
108 inet6_mc_check(sk, loc_addr, rmt_addr))
123 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
125 struct icmp6hdr *icmph;
126 struct raw6_sock *rp = raw6_sk(sk);
128 if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
129 __u32 *data = &rp->filter.data[0];
132 icmph = (struct icmp6hdr *) skb->data;
133 bit_nr = icmph->icmp6_type;
135 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
141 * demultiplex raw sockets.
142 * (should consider queueing the skb in the sock receive_queue
143 * without calling rawv6.c)
145 * Caller owns SKB so we must make clones.
147 int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
149 struct in6_addr *saddr;
150 struct in6_addr *daddr;
155 saddr = &skb->nh.ipv6h->saddr;
158 hash = nexthdr & (MAX_INET_PROTOS - 1);
160 read_lock(&raw_v6_lock);
161 sk = sk_head(&raw_v6_htable[hash]);
164 * The first socket found will be delivered after
165 * delivery to transport protocols.
171 sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
179 filtered = icmpv6_filter(sk, skb);
181 #ifdef CONFIG_IPV6_MIP6
183 /* XXX: To validate MH only once for each packet,
184 * this is placed here. It should be after checking
185 * xfrm policy, however it doesn't. The checking xfrm
186 * policy is placed in rawv6_rcv() because it is
187 * required for each socket.
189 filtered = mip6_mh_filter(sk, skb);
200 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
202 /* Not releasing hash table! */
205 rawv6_rcv(sk, clone);
208 sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr,
212 read_unlock(&raw_v6_lock);
216 /* This cleans up af_inet6 a bit. -DaveM */
217 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
219 struct inet_sock *inet = inet_sk(sk);
220 struct ipv6_pinfo *np = inet6_sk(sk);
221 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
226 if (addr_len < SIN6_LEN_RFC2133)
228 addr_type = ipv6_addr_type(&addr->sin6_addr);
230 /* Raw sockets are IPv6 only */
231 if (addr_type == IPV6_ADDR_MAPPED)
232 return(-EADDRNOTAVAIL);
237 if (sk->sk_state != TCP_CLOSE)
240 /* Check if the address belongs to the host. */
241 if (addr_type != IPV6_ADDR_ANY) {
242 struct net_device *dev = NULL;
244 if (addr_type & IPV6_ADDR_LINKLOCAL) {
245 if (addr_len >= sizeof(struct sockaddr_in6) &&
246 addr->sin6_scope_id) {
247 /* Override any existing binding, if another
248 * one is supplied by user.
250 sk->sk_bound_dev_if = addr->sin6_scope_id;
253 /* Binding to link-local address requires an interface */
254 if (!sk->sk_bound_dev_if)
257 dev = dev_get_by_index(sk->sk_bound_dev_if);
264 /* ipv4 addr of the socket is invalid. Only the
265 * unspecified and mapped address have a v4 equivalent.
267 v4addr = LOOPBACK4_IPV6;
268 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
269 err = -EADDRNOTAVAIL;
270 if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
280 inet->rcv_saddr = inet->saddr = v4addr;
281 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
282 if (!(addr_type & IPV6_ADDR_MULTICAST))
283 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
290 void rawv6_err(struct sock *sk, struct sk_buff *skb,
291 struct inet6_skb_parm *opt,
292 int type, int code, int offset, __be32 info)
294 struct inet_sock *inet = inet_sk(sk);
295 struct ipv6_pinfo *np = inet6_sk(sk);
299 /* Report error on raw socket, if:
300 1. User requested recverr.
301 2. Socket is connected (otherwise the error indication
302 is useless without recverr and error is hard.
304 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
307 harderr = icmpv6_err_convert(type, code, &err);
308 if (type == ICMPV6_PKT_TOOBIG)
309 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
312 u8 *payload = skb->data;
315 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
318 if (np->recverr || harderr) {
320 sk->sk_error_report(sk);
324 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
326 if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
327 skb_checksum_complete(skb)) {
328 /* FIXME: increment a raw6 drops counter here */
333 /* Charge it to the socket. */
334 if (sock_queue_rcv_skb(sk,skb)<0) {
335 /* FIXME: increment a raw6 drops counter here */
344 * This is next to useless...
345 * if we demultiplex in network layer we don't need the extra call
346 * just to queue the skb...
347 * maybe we could have the network decide upon a hint if it
348 * should call raw_rcv for demultiplexing
350 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
352 struct inet_sock *inet = inet_sk(sk);
353 struct raw6_sock *rp = raw6_sk(sk);
355 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
361 skb->ip_summed = CHECKSUM_UNNECESSARY;
363 if (skb->ip_summed == CHECKSUM_COMPLETE) {
364 skb_postpull_rcsum(skb, skb_network_header(skb),
365 skb->h.raw - skb->nh.raw);
366 if (!csum_ipv6_magic(&skb->nh.ipv6h->saddr,
367 &skb->nh.ipv6h->daddr,
368 skb->len, inet->num, skb->csum))
369 skb->ip_summed = CHECKSUM_UNNECESSARY;
371 if (skb->ip_summed != CHECKSUM_UNNECESSARY)
372 skb->csum = ~csum_unfold(csum_ipv6_magic(&skb->nh.ipv6h->saddr,
373 &skb->nh.ipv6h->daddr,
374 skb->len, inet->num, 0));
377 if (skb_checksum_complete(skb)) {
378 /* FIXME: increment a raw6 drops counter here */
384 rawv6_rcv_skb(sk, skb);
390 * This should be easy, if there is something there
391 * we return it, otherwise we block.
394 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
395 struct msghdr *msg, size_t len,
396 int noblock, int flags, int *addr_len)
398 struct ipv6_pinfo *np = inet6_sk(sk);
399 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
408 *addr_len=sizeof(*sin6);
410 if (flags & MSG_ERRQUEUE)
411 return ipv6_recv_error(sk, msg, len);
413 skb = skb_recv_datagram(sk, flags, noblock, &err);
420 msg->msg_flags |= MSG_TRUNC;
423 if (skb->ip_summed==CHECKSUM_UNNECESSARY) {
424 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
425 } else if (msg->msg_flags&MSG_TRUNC) {
426 if (__skb_checksum_complete(skb))
428 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
430 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
437 /* Copy the address. */
439 sin6->sin6_family = AF_INET6;
441 ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr);
442 sin6->sin6_flowinfo = 0;
443 sin6->sin6_scope_id = 0;
444 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
445 sin6->sin6_scope_id = IP6CB(skb)->iif;
448 sock_recv_timestamp(msg, sk, skb);
451 datagram_recv_ctl(sk, msg, skb);
454 if (flags & MSG_TRUNC)
458 skb_free_datagram(sk, skb);
463 skb_kill_datagram(sk, skb, flags);
465 /* Error for blocking case is chosen to masquerade
466 as some normal condition.
468 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
469 /* FIXME: increment a raw6 drops counter here */
473 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
474 struct raw6_sock *rp)
487 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
491 total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
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_put(skb, length);
580 skb_reset_network_header(skb);
583 skb->ip_summed = CHECKSUM_NONE;
585 skb->h.raw = skb->nh.raw;
586 err = memcpy_fromiovecend((void *)iph, from, 0, length);
590 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
591 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
594 err = np->recverr ? net_xmit_errno(err) : 0;
604 IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
608 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
611 u8 __user *type = NULL;
612 u8 __user *code = NULL;
613 #ifdef CONFIG_IPV6_MIP6
622 for (i = 0; i < msg->msg_iovlen; i++) {
623 iov = &msg->msg_iov[i];
629 /* check if one-byte field is readable or not. */
630 if (iov->iov_base && iov->iov_len < 1)
634 type = iov->iov_base;
635 /* check if code field is readable or not. */
636 if (iov->iov_len > 1)
639 code = iov->iov_base;
642 if (get_user(fl->fl_icmp_type, type) ||
643 get_user(fl->fl_icmp_code, code))
648 #ifdef CONFIG_IPV6_MIP6
650 if (iov->iov_base && iov->iov_len < 1)
652 /* check if type field is readable or not. */
653 if (iov->iov_len > 2 - len) {
654 u8 __user *p = iov->iov_base;
655 if (get_user(fl->fl_mh_type, &p[2 - len]))
673 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
674 struct msghdr *msg, size_t len)
676 struct ipv6_txoptions opt_space;
677 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
678 struct in6_addr *daddr, *final_p = NULL, final;
679 struct inet_sock *inet = inet_sk(sk);
680 struct ipv6_pinfo *np = inet6_sk(sk);
681 struct raw6_sock *rp = raw6_sk(sk);
682 struct ipv6_txoptions *opt = NULL;
683 struct ip6_flowlabel *flowlabel = NULL;
684 struct dst_entry *dst = NULL;
686 int addr_len = msg->msg_namelen;
692 /* Rough check on arithmetic overflow,
693 better check is made in ip6_append_data().
698 /* Mirror BSD error message compatibility */
699 if (msg->msg_flags & MSG_OOB)
703 * Get and verify the address.
705 memset(&fl, 0, sizeof(fl));
708 if (addr_len < SIN6_LEN_RFC2133)
711 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
712 return(-EAFNOSUPPORT);
714 /* port is the proto value [0..255] carried in nexthdr */
715 proto = ntohs(sin6->sin6_port);
719 else if (proto != inet->num)
725 daddr = &sin6->sin6_addr;
727 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
728 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
729 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
730 if (flowlabel == NULL)
732 daddr = &flowlabel->dst;
737 * Otherwise it will be difficult to maintain
740 if (sk->sk_state == TCP_ESTABLISHED &&
741 ipv6_addr_equal(daddr, &np->daddr))
744 if (addr_len >= sizeof(struct sockaddr_in6) &&
745 sin6->sin6_scope_id &&
746 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
747 fl.oif = sin6->sin6_scope_id;
749 if (sk->sk_state != TCP_ESTABLISHED)
750 return -EDESTADDRREQ;
754 fl.fl6_flowlabel = np->flow_label;
757 if (ipv6_addr_any(daddr)) {
759 * unspecified destination address
760 * treated as error... is this correct ?
762 fl6_sock_release(flowlabel);
767 fl.oif = sk->sk_bound_dev_if;
769 if (msg->msg_controllen) {
771 memset(opt, 0, sizeof(struct ipv6_txoptions));
772 opt->tot_len = sizeof(struct ipv6_txoptions);
774 err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass);
776 fl6_sock_release(flowlabel);
779 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
780 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
781 if (flowlabel == NULL)
784 if (!(opt->opt_nflen|opt->opt_flen))
790 opt = fl6_merge_options(&opt_space, flowlabel, opt);
791 opt = ipv6_fixup_options(&opt_space, opt);
794 err = rawv6_probe_proto_opt(&fl, msg);
798 ipv6_addr_copy(&fl.fl6_dst, daddr);
799 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
800 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
802 /* merge ip6_build_xmit from ip6_output */
803 if (opt && opt->srcrt) {
804 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
805 ipv6_addr_copy(&final, &fl.fl6_dst);
806 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
810 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
811 fl.oif = np->mcast_oif;
812 security_sk_classify_flow(sk, &fl);
814 err = ip6_dst_lookup(sk, &dst, &fl);
818 ipv6_addr_copy(&fl.fl6_dst, final_p);
820 if ((err = xfrm_lookup(&dst, &fl, sk, 1)) < 0)
824 if (ipv6_addr_is_multicast(&fl.fl6_dst))
825 hlimit = np->mcast_hops;
827 hlimit = np->hop_limit;
829 hlimit = dst_metric(dst, RTAX_HOPLIMIT);
831 hlimit = ipv6_get_hoplimit(dst->dev);
840 if (msg->msg_flags&MSG_CONFIRM)
845 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
848 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
849 len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
853 ip6_flush_pending_frames(sk);
854 else if (!(msg->msg_flags & MSG_MORE))
855 err = rawv6_push_pending_frames(sk, &fl, rp);
862 fl6_sock_release(flowlabel);
863 return err<0?err:len;
866 if (!(msg->msg_flags & MSG_PROBE) || len)
867 goto back_from_confirm;
872 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
873 char __user *optval, int optlen)
877 if (optlen > sizeof(struct icmp6_filter))
878 optlen = sizeof(struct icmp6_filter);
879 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
889 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
890 char __user *optval, int __user *optlen)
896 if (get_user(len, optlen))
900 if (len > sizeof(struct icmp6_filter))
901 len = sizeof(struct icmp6_filter);
902 if (put_user(len, optlen))
904 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
915 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
916 char __user *optval, int optlen)
918 struct raw6_sock *rp = raw6_sk(sk);
921 if (get_user(val, (int __user *)optval))
926 /* You may get strange result with a positive odd offset;
927 RFC2292bis agrees with me. */
928 if (val > 0 && (val&1))
941 return(-ENOPROTOOPT);
945 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
946 char __user *optval, int optlen)
953 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
955 return rawv6_seticmpfilter(sk, level, optname, optval,
958 if (optname == IPV6_CHECKSUM)
961 return ipv6_setsockopt(sk, level, optname, optval,
964 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
968 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
969 char __user *optval, int optlen)
975 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
977 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
979 if (optname == IPV6_CHECKSUM)
982 return compat_ipv6_setsockopt(sk, level, optname,
985 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
989 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
990 char __user *optval, int __user *optlen)
992 struct raw6_sock *rp = raw6_sk(sk);
995 if (get_user(len,optlen))
1000 if (rp->checksum == 0)
1007 return -ENOPROTOOPT;
1010 len = min_t(unsigned int, sizeof(int), len);
1012 if (put_user(len, optlen))
1014 if (copy_to_user(optval,&val,len))
1019 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1020 char __user *optval, int __user *optlen)
1027 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1029 return rawv6_geticmpfilter(sk, level, optname, optval,
1032 if (optname == IPV6_CHECKSUM)
1035 return ipv6_getsockopt(sk, level, optname, optval,
1038 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1041 #ifdef CONFIG_COMPAT
1042 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1043 char __user *optval, int __user *optlen)
1049 if (inet_sk(sk)->num != IPPROTO_ICMPV6)
1051 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1053 if (optname == IPV6_CHECKSUM)
1056 return compat_ipv6_getsockopt(sk, level, optname,
1059 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1063 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1068 int amount = atomic_read(&sk->sk_wmem_alloc);
1069 return put_user(amount, (int __user *)arg);
1073 struct sk_buff *skb;
1076 spin_lock_bh(&sk->sk_receive_queue.lock);
1077 skb = skb_peek(&sk->sk_receive_queue);
1079 amount = skb->tail - skb->h.raw;
1080 spin_unlock_bh(&sk->sk_receive_queue.lock);
1081 return put_user(amount, (int __user *)arg);
1085 return -ENOIOCTLCMD;
1089 static void rawv6_close(struct sock *sk, long timeout)
1091 if (inet_sk(sk)->num == IPPROTO_RAW)
1092 ip6_ra_control(sk, -1, NULL);
1094 sk_common_release(sk);
1097 static int rawv6_init_sk(struct sock *sk)
1099 struct raw6_sock *rp = raw6_sk(sk);
1101 switch (inet_sk(sk)->num) {
1102 case IPPROTO_ICMPV6:
1116 struct proto rawv6_prot = {
1118 .owner = THIS_MODULE,
1119 .close = rawv6_close,
1120 .connect = ip6_datagram_connect,
1121 .disconnect = udp_disconnect,
1122 .ioctl = rawv6_ioctl,
1123 .init = rawv6_init_sk,
1124 .destroy = inet6_destroy_sock,
1125 .setsockopt = rawv6_setsockopt,
1126 .getsockopt = rawv6_getsockopt,
1127 .sendmsg = rawv6_sendmsg,
1128 .recvmsg = rawv6_recvmsg,
1130 .backlog_rcv = rawv6_rcv_skb,
1131 .hash = raw_v6_hash,
1132 .unhash = raw_v6_unhash,
1133 .obj_size = sizeof(struct raw6_sock),
1134 #ifdef CONFIG_COMPAT
1135 .compat_setsockopt = compat_rawv6_setsockopt,
1136 .compat_getsockopt = compat_rawv6_getsockopt,
1140 #ifdef CONFIG_PROC_FS
1141 struct raw6_iter_state {
1145 #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private)
1147 static struct sock *raw6_get_first(struct seq_file *seq)
1150 struct hlist_node *node;
1151 struct raw6_iter_state* state = raw6_seq_private(seq);
1153 for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket)
1154 sk_for_each(sk, node, &raw_v6_htable[state->bucket])
1155 if (sk->sk_family == PF_INET6)
1162 static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk)
1164 struct raw6_iter_state* state = raw6_seq_private(seq);
1170 } while (sk && sk->sk_family != PF_INET6);
1172 if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) {
1173 sk = sk_head(&raw_v6_htable[state->bucket]);
1179 static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos)
1181 struct sock *sk = raw6_get_first(seq);
1183 while (pos && (sk = raw6_get_next(seq, sk)) != NULL)
1185 return pos ? NULL : sk;
1188 static void *raw6_seq_start(struct seq_file *seq, loff_t *pos)
1190 read_lock(&raw_v6_lock);
1191 return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
1194 static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1198 if (v == SEQ_START_TOKEN)
1199 sk = raw6_get_first(seq);
1201 sk = raw6_get_next(seq, v);
1206 static void raw6_seq_stop(struct seq_file *seq, void *v)
1208 read_unlock(&raw_v6_lock);
1211 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1213 struct ipv6_pinfo *np = inet6_sk(sp);
1214 struct in6_addr *dest, *src;
1218 src = &np->rcv_saddr;
1220 srcp = inet_sk(sp)->num;
1222 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1223 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n",
1225 src->s6_addr32[0], src->s6_addr32[1],
1226 src->s6_addr32[2], src->s6_addr32[3], srcp,
1227 dest->s6_addr32[0], dest->s6_addr32[1],
1228 dest->s6_addr32[2], dest->s6_addr32[3], destp,
1230 atomic_read(&sp->sk_wmem_alloc),
1231 atomic_read(&sp->sk_rmem_alloc),
1235 atomic_read(&sp->sk_refcnt), sp);
1238 static int raw6_seq_show(struct seq_file *seq, void *v)
1240 if (v == SEQ_START_TOKEN)
1245 "st tx_queue rx_queue tr tm->when retrnsmt"
1246 " uid timeout inode\n");
1248 raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket);
1252 static struct seq_operations raw6_seq_ops = {
1253 .start = raw6_seq_start,
1254 .next = raw6_seq_next,
1255 .stop = raw6_seq_stop,
1256 .show = raw6_seq_show,
1259 static int raw6_seq_open(struct inode *inode, struct file *file)
1261 struct seq_file *seq;
1263 struct raw6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
1266 rc = seq_open(file, &raw6_seq_ops);
1269 seq = file->private_data;
1278 static const struct file_operations raw6_seq_fops = {
1279 .owner = THIS_MODULE,
1280 .open = raw6_seq_open,
1282 .llseek = seq_lseek,
1283 .release = seq_release_private,
1286 int __init raw6_proc_init(void)
1288 if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops))
1293 void raw6_proc_exit(void)
1295 proc_net_remove("raw6");
1297 #endif /* CONFIG_PROC_FS */