3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Adapted from linux/net/ipv4/raw.c
11 * Hideaki YOSHIFUJI : sin6_scope_id support
12 * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance)
13 * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
21 #include <linux/errno.h>
22 #include <linux/types.h>
23 #include <linux/socket.h>
24 #include <linux/slab.h>
25 #include <linux/sockios.h>
26 #include <linux/net.h>
27 #include <linux/in6.h>
28 #include <linux/netdevice.h>
29 #include <linux/if_arp.h>
30 #include <linux/icmpv6.h>
31 #include <linux/netfilter.h>
32 #include <linux/netfilter_ipv6.h>
33 #include <linux/skbuff.h>
34 #include <asm/uaccess.h>
35 #include <asm/ioctls.h>
37 #include <net/net_namespace.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 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
55 #include <linux/mroute6.h>
58 #include <net/rawv6.h>
61 #include <linux/proc_fs.h>
62 #include <linux/seq_file.h>
64 static struct raw_hashinfo raw_v6_hashinfo = {
65 .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
68 static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
69 unsigned short num, struct in6_addr *loc_addr,
70 struct in6_addr *rmt_addr, int dif)
72 struct hlist_node *node;
73 int is_multicast = ipv6_addr_is_multicast(loc_addr);
75 sk_for_each_from(sk, node)
76 if (inet_sk(sk)->inet_num == num) {
77 struct ipv6_pinfo *np = inet6_sk(sk);
79 if (!net_eq(sock_net(sk), net))
82 if (!ipv6_addr_any(&np->daddr) &&
83 !ipv6_addr_equal(&np->daddr, rmt_addr))
86 if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
89 if (!ipv6_addr_any(&np->rcv_saddr)) {
90 if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
93 inet6_mc_check(sk, loc_addr, rmt_addr))
108 static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
110 struct icmp6hdr *icmph;
111 struct raw6_sock *rp = raw6_sk(sk);
113 if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) {
114 __u32 *data = &rp->filter.data[0];
117 icmph = (struct icmp6hdr *) skb->data;
118 bit_nr = icmph->icmp6_type;
120 return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0;
125 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
126 static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
128 int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
129 struct sk_buff *skb))
131 rcu_assign_pointer(mh_filter, filter);
134 EXPORT_SYMBOL(rawv6_mh_filter_register);
136 int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
137 struct sk_buff *skb))
139 rcu_assign_pointer(mh_filter, NULL);
143 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
148 * demultiplex raw sockets.
149 * (should consider queueing the skb in the sock receive_queue
150 * without calling rawv6.c)
152 * Caller owns SKB so we must make clones.
154 static int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
156 struct in6_addr *saddr;
157 struct in6_addr *daddr;
163 saddr = &ipv6_hdr(skb)->saddr;
166 hash = nexthdr & (MAX_INET_PROTOS - 1);
168 read_lock(&raw_v6_hashinfo.lock);
169 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
174 net = dev_net(skb->dev);
175 sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);
183 filtered = icmpv6_filter(sk, skb);
186 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
189 /* XXX: To validate MH only once for each packet,
190 * this is placed here. It should be after checking
191 * xfrm policy, however it doesn't. The checking xfrm
192 * policy is placed in rawv6_rcv() because it is
193 * required for each socket.
195 int (*filter)(struct sock *sock, struct sk_buff *skb);
197 filter = rcu_dereference(mh_filter);
198 filtered = filter ? filter(sk, skb) : 0;
210 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
212 /* Not releasing hash table! */
215 rawv6_rcv(sk, clone);
218 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
222 read_unlock(&raw_v6_hashinfo.lock);
226 int raw6_local_deliver(struct sk_buff *skb, int nexthdr)
230 raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (MAX_INET_PROTOS - 1)]);
231 if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
234 return raw_sk != NULL;
237 /* This cleans up af_inet6 a bit. -DaveM */
238 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
240 struct inet_sock *inet = inet_sk(sk);
241 struct ipv6_pinfo *np = inet6_sk(sk);
242 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
247 if (addr_len < SIN6_LEN_RFC2133)
249 addr_type = ipv6_addr_type(&addr->sin6_addr);
251 /* Raw sockets are IPv6 only */
252 if (addr_type == IPV6_ADDR_MAPPED)
253 return -EADDRNOTAVAIL;
258 if (sk->sk_state != TCP_CLOSE)
262 /* Check if the address belongs to the host. */
263 if (addr_type != IPV6_ADDR_ANY) {
264 struct net_device *dev = NULL;
266 if (addr_type & IPV6_ADDR_LINKLOCAL) {
267 if (addr_len >= sizeof(struct sockaddr_in6) &&
268 addr->sin6_scope_id) {
269 /* Override any existing binding, if another
270 * one is supplied by user.
272 sk->sk_bound_dev_if = addr->sin6_scope_id;
275 /* Binding to link-local address requires an interface */
276 if (!sk->sk_bound_dev_if)
280 dev = dev_get_by_index_rcu(sock_net(sk),
281 sk->sk_bound_dev_if);
286 /* ipv4 addr of the socket is invalid. Only the
287 * unspecified and mapped address have a v4 equivalent.
289 v4addr = LOOPBACK4_IPV6;
290 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
291 err = -EADDRNOTAVAIL;
292 if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
299 inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
300 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
301 if (!(addr_type & IPV6_ADDR_MULTICAST))
302 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
311 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
312 struct inet6_skb_parm *opt,
313 u8 type, u8 code, int offset, __be32 info)
315 struct inet_sock *inet = inet_sk(sk);
316 struct ipv6_pinfo *np = inet6_sk(sk);
320 /* Report error on raw socket, if:
321 1. User requested recverr.
322 2. Socket is connected (otherwise the error indication
323 is useless without recverr and error is hard.
325 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
328 harderr = icmpv6_err_convert(type, code, &err);
329 if (type == ICMPV6_PKT_TOOBIG)
330 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
333 u8 *payload = skb->data;
336 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
339 if (np->recverr || harderr) {
341 sk->sk_error_report(sk);
345 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
346 u8 type, u8 code, int inner_offset, __be32 info)
350 struct in6_addr *saddr, *daddr;
353 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
355 read_lock(&raw_v6_hashinfo.lock);
356 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
358 /* Note: ipv6_hdr(skb) != skb->data */
359 struct ipv6hdr *ip6h = (struct ipv6hdr *)skb->data;
360 saddr = &ip6h->saddr;
361 daddr = &ip6h->daddr;
362 net = dev_net(skb->dev);
364 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
366 rawv6_err(sk, skb, NULL, type, code,
371 read_unlock(&raw_v6_hashinfo.lock);
374 static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
376 if ((raw6_sk(sk)->checksum || sk->sk_filter) &&
377 skb_checksum_complete(skb)) {
378 atomic_inc(&sk->sk_drops);
383 /* Charge it to the socket. */
384 if (sock_queue_rcv_skb(sk, skb) < 0) {
393 * This is next to useless...
394 * if we demultiplex in network layer we don't need the extra call
395 * just to queue the skb...
396 * maybe we could have the network decide upon a hint if it
397 * should call raw_rcv for demultiplexing
399 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
401 struct inet_sock *inet = inet_sk(sk);
402 struct raw6_sock *rp = raw6_sk(sk);
404 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
405 atomic_inc(&sk->sk_drops);
411 skb->ip_summed = CHECKSUM_UNNECESSARY;
413 if (skb->ip_summed == CHECKSUM_COMPLETE) {
414 skb_postpull_rcsum(skb, skb_network_header(skb),
415 skb_network_header_len(skb));
416 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
417 &ipv6_hdr(skb)->daddr,
418 skb->len, inet->inet_num, skb->csum))
419 skb->ip_summed = CHECKSUM_UNNECESSARY;
421 if (!skb_csum_unnecessary(skb))
422 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
423 &ipv6_hdr(skb)->daddr,
428 if (skb_checksum_complete(skb)) {
429 atomic_inc(&sk->sk_drops);
435 rawv6_rcv_skb(sk, skb);
441 * This should be easy, if there is something there
442 * we return it, otherwise we block.
445 static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
446 struct msghdr *msg, size_t len,
447 int noblock, int flags, int *addr_len)
449 struct ipv6_pinfo *np = inet6_sk(sk);
450 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name;
459 *addr_len=sizeof(*sin6);
461 if (flags & MSG_ERRQUEUE)
462 return ipv6_recv_error(sk, msg, len);
464 skb = skb_recv_datagram(sk, flags, noblock, &err);
471 msg->msg_flags |= MSG_TRUNC;
474 if (skb_csum_unnecessary(skb)) {
475 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
476 } else if (msg->msg_flags&MSG_TRUNC) {
477 if (__skb_checksum_complete(skb))
479 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
481 err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
488 /* Copy the address. */
490 sin6->sin6_family = AF_INET6;
492 ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr);
493 sin6->sin6_flowinfo = 0;
494 sin6->sin6_scope_id = 0;
495 if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
496 sin6->sin6_scope_id = IP6CB(skb)->iif;
499 sock_recv_ts_and_drops(msg, sk, skb);
502 datagram_recv_ctl(sk, msg, skb);
505 if (flags & MSG_TRUNC)
509 skb_free_datagram(sk, skb);
514 skb_kill_datagram(sk, skb, flags);
516 /* Error for blocking case is chosen to masquerade
517 as some normal condition.
519 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
523 static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
524 struct raw6_sock *rp)
537 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
541 total_len = inet_sk(sk)->cork.length - (skb_network_header(skb) -
543 if (offset >= total_len - 1) {
545 ip6_flush_pending_frames(sk);
549 /* should be check HW csum miyazawa */
550 if (skb_queue_len(&sk->sk_write_queue) == 1) {
552 * Only one fragment on the socket.
554 tmp_csum = skb->csum;
556 struct sk_buff *csum_skb = NULL;
559 skb_queue_walk(&sk->sk_write_queue, skb) {
560 tmp_csum = csum_add(tmp_csum, skb->csum);
565 len = skb->len - skb_transport_offset(skb);
577 offset += skb_transport_offset(skb);
578 if (skb_copy_bits(skb, offset, &csum, 2))
581 /* in case cksum was not initialized */
583 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
585 csum = csum_ipv6_magic(&fl->fl6_src,
587 total_len, fl->proto, tmp_csum);
589 if (csum == 0 && fl->proto == IPPROTO_UDP)
590 csum = CSUM_MANGLED_0;
592 if (skb_store_bits(skb, offset, &csum, 2))
596 err = ip6_push_pending_frames(sk);
601 static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
602 struct flowi *fl, struct rt6_info *rt,
605 struct ipv6_pinfo *np = inet6_sk(sk);
610 if (length > rt->u.dst.dev->mtu) {
611 ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
617 skb = sock_alloc_send_skb(sk,
618 length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15,
619 flags & MSG_DONTWAIT, &err);
622 skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
624 skb->priority = sk->sk_priority;
625 skb->mark = sk->sk_mark;
626 skb_dst_set(skb, dst_clone(&rt->u.dst));
628 skb_put(skb, length);
629 skb_reset_network_header(skb);
632 skb->ip_summed = CHECKSUM_NONE;
634 skb->transport_header = skb->network_header;
635 err = memcpy_fromiovecend((void *)iph, from, 0, length);
639 IP6_UPD_PO_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
640 err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
643 err = net_xmit_errno(err);
653 IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
654 if (err == -ENOBUFS && !np->recverr)
659 static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
662 u8 __user *type = NULL;
663 u8 __user *code = NULL;
671 for (i = 0; i < msg->msg_iovlen; i++) {
672 iov = &msg->msg_iov[i];
678 /* check if one-byte field is readable or not. */
679 if (iov->iov_base && iov->iov_len < 1)
683 type = iov->iov_base;
684 /* check if code field is readable or not. */
685 if (iov->iov_len > 1)
688 code = iov->iov_base;
691 if (get_user(fl->fl_icmp_type, type) ||
692 get_user(fl->fl_icmp_code, code))
698 if (iov->iov_base && iov->iov_len < 1)
700 /* check if type field is readable or not. */
701 if (iov->iov_len > 2 - len) {
702 u8 __user *p = iov->iov_base;
703 if (get_user(fl->fl_mh_type, &p[2 - len]))
720 static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
721 struct msghdr *msg, size_t len)
723 struct ipv6_txoptions opt_space;
724 struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name;
725 struct in6_addr *daddr, *final_p = NULL, final;
726 struct inet_sock *inet = inet_sk(sk);
727 struct ipv6_pinfo *np = inet6_sk(sk);
728 struct raw6_sock *rp = raw6_sk(sk);
729 struct ipv6_txoptions *opt = NULL;
730 struct ip6_flowlabel *flowlabel = NULL;
731 struct dst_entry *dst = NULL;
733 int addr_len = msg->msg_namelen;
739 /* Rough check on arithmetic overflow,
740 better check is made in ip6_append_data().
745 /* Mirror BSD error message compatibility */
746 if (msg->msg_flags & MSG_OOB)
750 * Get and verify the address.
752 memset(&fl, 0, sizeof(fl));
754 fl.mark = sk->sk_mark;
757 if (addr_len < SIN6_LEN_RFC2133)
760 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
761 return(-EAFNOSUPPORT);
763 /* port is the proto value [0..255] carried in nexthdr */
764 proto = ntohs(sin6->sin6_port);
767 proto = inet->inet_num;
768 else if (proto != inet->inet_num)
774 daddr = &sin6->sin6_addr;
776 fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
777 if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) {
778 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
779 if (flowlabel == NULL)
781 daddr = &flowlabel->dst;
786 * Otherwise it will be difficult to maintain
789 if (sk->sk_state == TCP_ESTABLISHED &&
790 ipv6_addr_equal(daddr, &np->daddr))
793 if (addr_len >= sizeof(struct sockaddr_in6) &&
794 sin6->sin6_scope_id &&
795 ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL)
796 fl.oif = sin6->sin6_scope_id;
798 if (sk->sk_state != TCP_ESTABLISHED)
799 return -EDESTADDRREQ;
801 proto = inet->inet_num;
803 fl.fl6_flowlabel = np->flow_label;
807 fl.oif = sk->sk_bound_dev_if;
809 if (msg->msg_controllen) {
811 memset(opt, 0, sizeof(struct ipv6_txoptions));
812 opt->tot_len = sizeof(struct ipv6_txoptions);
814 err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass);
816 fl6_sock_release(flowlabel);
819 if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
820 flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
821 if (flowlabel == NULL)
824 if (!(opt->opt_nflen|opt->opt_flen))
830 opt = fl6_merge_options(&opt_space, flowlabel, opt);
831 opt = ipv6_fixup_options(&opt_space, opt);
834 err = rawv6_probe_proto_opt(&fl, msg);
838 if (!ipv6_addr_any(daddr))
839 ipv6_addr_copy(&fl.fl6_dst, daddr);
841 fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
842 if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))
843 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
845 /* merge ip6_build_xmit from ip6_output */
846 if (opt && opt->srcrt) {
847 struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
848 ipv6_addr_copy(&final, &fl.fl6_dst);
849 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
853 if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
854 fl.oif = np->mcast_oif;
855 security_sk_classify_flow(sk, &fl);
857 err = ip6_dst_lookup(sk, &dst, &fl);
861 ipv6_addr_copy(&fl.fl6_dst, final_p);
863 err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT);
866 err = ip6_dst_blackhole(sk, &dst, &fl);
872 if (ipv6_addr_is_multicast(&fl.fl6_dst))
873 hlimit = np->mcast_hops;
875 hlimit = np->hop_limit;
877 hlimit = ip6_dst_hoplimit(dst);
883 if (msg->msg_flags&MSG_CONFIRM)
888 err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
891 err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
892 len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,
896 ip6_flush_pending_frames(sk);
897 else if (!(msg->msg_flags & MSG_MORE))
898 err = rawv6_push_pending_frames(sk, &fl, rp);
904 fl6_sock_release(flowlabel);
905 return err<0?err:len;
908 if (!(msg->msg_flags & MSG_PROBE) || len)
909 goto back_from_confirm;
914 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
915 char __user *optval, int optlen)
919 if (optlen > sizeof(struct icmp6_filter))
920 optlen = sizeof(struct icmp6_filter);
921 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
931 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
932 char __user *optval, int __user *optlen)
938 if (get_user(len, optlen))
942 if (len > sizeof(struct icmp6_filter))
943 len = sizeof(struct icmp6_filter);
944 if (put_user(len, optlen))
946 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
957 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
958 char __user *optval, unsigned int optlen)
960 struct raw6_sock *rp = raw6_sk(sk);
963 if (get_user(val, (int __user *)optval))
968 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
969 level == IPPROTO_IPV6) {
971 * RFC3542 tells that IPV6_CHECKSUM socket
972 * option in the IPPROTO_IPV6 level is not
973 * allowed on ICMPv6 sockets.
974 * If you want to set it, use IPPROTO_RAW
975 * level IPV6_CHECKSUM socket option
981 /* You may get strange result with a positive odd offset;
982 RFC2292bis agrees with me. */
983 if (val > 0 && (val&1))
996 return(-ENOPROTOOPT);
1000 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1001 char __user *optval, unsigned int optlen)
1008 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1010 return rawv6_seticmpfilter(sk, level, optname, optval,
1013 if (optname == IPV6_CHECKSUM)
1016 return ipv6_setsockopt(sk, level, optname, optval,
1020 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1023 #ifdef CONFIG_COMPAT
1024 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1025 char __user *optval, unsigned int optlen)
1031 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1033 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1035 if (optname == IPV6_CHECKSUM)
1038 return compat_ipv6_setsockopt(sk, level, optname,
1041 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1045 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1046 char __user *optval, int __user *optlen)
1048 struct raw6_sock *rp = raw6_sk(sk);
1051 if (get_user(len,optlen))
1057 * We allow getsockopt() for IPPROTO_IPV6-level
1058 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1059 * since RFC3542 is silent about it.
1061 if (rp->checksum == 0)
1068 return -ENOPROTOOPT;
1071 len = min_t(unsigned int, sizeof(int), len);
1073 if (put_user(len, optlen))
1075 if (copy_to_user(optval,&val,len))
1080 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1081 char __user *optval, int __user *optlen)
1088 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1090 return rawv6_geticmpfilter(sk, level, optname, optval,
1093 if (optname == IPV6_CHECKSUM)
1096 return ipv6_getsockopt(sk, level, optname, optval,
1100 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1103 #ifdef CONFIG_COMPAT
1104 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1105 char __user *optval, int __user *optlen)
1111 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1113 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1115 if (optname == IPV6_CHECKSUM)
1118 return compat_ipv6_getsockopt(sk, level, optname,
1121 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1125 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1130 int amount = sk_wmem_alloc_get(sk);
1132 return put_user(amount, (int __user *)arg);
1136 struct sk_buff *skb;
1139 spin_lock_bh(&sk->sk_receive_queue.lock);
1140 skb = skb_peek(&sk->sk_receive_queue);
1142 amount = skb->tail - skb->transport_header;
1143 spin_unlock_bh(&sk->sk_receive_queue.lock);
1144 return put_user(amount, (int __user *)arg);
1148 #ifdef CONFIG_IPV6_MROUTE
1149 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1151 return -ENOIOCTLCMD;
1156 static void rawv6_close(struct sock *sk, long timeout)
1158 if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1159 ip6_ra_control(sk, -1);
1161 sk_common_release(sk);
1164 static void raw6_destroy(struct sock *sk)
1167 ip6_flush_pending_frames(sk);
1170 inet6_destroy_sock(sk);
1173 static int rawv6_init_sk(struct sock *sk)
1175 struct raw6_sock *rp = raw6_sk(sk);
1177 switch (inet_sk(sk)->inet_num) {
1178 case IPPROTO_ICMPV6:
1192 struct proto rawv6_prot = {
1194 .owner = THIS_MODULE,
1195 .close = rawv6_close,
1196 .destroy = raw6_destroy,
1197 .connect = ip6_datagram_connect,
1198 .disconnect = udp_disconnect,
1199 .ioctl = rawv6_ioctl,
1200 .init = rawv6_init_sk,
1201 .setsockopt = rawv6_setsockopt,
1202 .getsockopt = rawv6_getsockopt,
1203 .sendmsg = rawv6_sendmsg,
1204 .recvmsg = rawv6_recvmsg,
1206 .backlog_rcv = rawv6_rcv_skb,
1207 .hash = raw_hash_sk,
1208 .unhash = raw_unhash_sk,
1209 .obj_size = sizeof(struct raw6_sock),
1210 .h.raw_hash = &raw_v6_hashinfo,
1211 #ifdef CONFIG_COMPAT
1212 .compat_setsockopt = compat_rawv6_setsockopt,
1213 .compat_getsockopt = compat_rawv6_getsockopt,
1217 #ifdef CONFIG_PROC_FS
1218 static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1220 struct ipv6_pinfo *np = inet6_sk(sp);
1221 struct in6_addr *dest, *src;
1225 src = &np->rcv_saddr;
1227 srcp = inet_sk(sp)->inet_num;
1229 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1230 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
1232 src->s6_addr32[0], src->s6_addr32[1],
1233 src->s6_addr32[2], src->s6_addr32[3], srcp,
1234 dest->s6_addr32[0], dest->s6_addr32[1],
1235 dest->s6_addr32[2], dest->s6_addr32[3], destp,
1237 sk_wmem_alloc_get(sp),
1238 sk_rmem_alloc_get(sp),
1242 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1245 static int raw6_seq_show(struct seq_file *seq, void *v)
1247 if (v == SEQ_START_TOKEN)
1252 "st tx_queue rx_queue tr tm->when retrnsmt"
1253 " uid timeout inode ref pointer drops\n");
1255 raw6_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1259 static const struct seq_operations raw6_seq_ops = {
1260 .start = raw_seq_start,
1261 .next = raw_seq_next,
1262 .stop = raw_seq_stop,
1263 .show = raw6_seq_show,
1266 static int raw6_seq_open(struct inode *inode, struct file *file)
1268 return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1271 static const struct file_operations raw6_seq_fops = {
1272 .owner = THIS_MODULE,
1273 .open = raw6_seq_open,
1275 .llseek = seq_lseek,
1276 .release = seq_release_net,
1279 static int __net_init raw6_init_net(struct net *net)
1281 if (!proc_net_fops_create(net, "raw6", S_IRUGO, &raw6_seq_fops))
1287 static void __net_exit raw6_exit_net(struct net *net)
1289 proc_net_remove(net, "raw6");
1292 static struct pernet_operations raw6_net_ops = {
1293 .init = raw6_init_net,
1294 .exit = raw6_exit_net,
1297 int __init raw6_proc_init(void)
1299 return register_pernet_subsys(&raw6_net_ops);
1302 void raw6_proc_exit(void)
1304 unregister_pernet_subsys(&raw6_net_ops);
1306 #endif /* CONFIG_PROC_FS */
1308 /* Same as inet6_dgram_ops, sans udp_poll. */
1309 static const struct proto_ops inet6_sockraw_ops = {
1311 .owner = THIS_MODULE,
1312 .release = inet6_release,
1314 .connect = inet_dgram_connect, /* ok */
1315 .socketpair = sock_no_socketpair, /* a do nothing */
1316 .accept = sock_no_accept, /* a do nothing */
1317 .getname = inet6_getname,
1318 .poll = datagram_poll, /* ok */
1319 .ioctl = inet6_ioctl, /* must change */
1320 .listen = sock_no_listen, /* ok */
1321 .shutdown = inet_shutdown, /* ok */
1322 .setsockopt = sock_common_setsockopt, /* ok */
1323 .getsockopt = sock_common_getsockopt, /* ok */
1324 .sendmsg = inet_sendmsg, /* ok */
1325 .recvmsg = sock_common_recvmsg, /* ok */
1326 .mmap = sock_no_mmap,
1327 .sendpage = sock_no_sendpage,
1328 #ifdef CONFIG_COMPAT
1329 .compat_setsockopt = compat_sock_common_setsockopt,
1330 .compat_getsockopt = compat_sock_common_getsockopt,
1334 static struct inet_protosw rawv6_protosw = {
1336 .protocol = IPPROTO_IP, /* wild card */
1337 .prot = &rawv6_prot,
1338 .ops = &inet6_sockraw_ops,
1339 .no_check = UDP_CSUM_DEFAULT,
1340 .flags = INET_PROTOSW_REUSE,
1343 int __init rawv6_init(void)
1347 ret = inet6_register_protosw(&rawv6_protosw);
1354 void rawv6_exit(void)
1356 inet6_unregister_protosw(&rawv6_protosw);