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 <linux/compat.h>
35 #include <linux/uaccess.h>
36 #include <asm/ioctls.h>
38 #include <net/net_namespace.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 #if IS_ENABLED(CONFIG_IPV6_MIP6)
56 #include <linux/mroute6.h>
59 #include <net/rawv6.h>
62 #include <linux/proc_fs.h>
63 #include <linux/seq_file.h>
64 #include <linux/export.h>
66 #define ICMPV6_HDRLEN 4 /* ICMPv6 header, RFC 4443 Section 2.1 */
68 struct raw_hashinfo raw_v6_hashinfo = {
69 .lock = __RW_LOCK_UNLOCKED(raw_v6_hashinfo.lock),
71 EXPORT_SYMBOL_GPL(raw_v6_hashinfo);
73 struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
74 unsigned short num, const struct in6_addr *loc_addr,
75 const struct in6_addr *rmt_addr, int dif, int sdif)
77 bool is_multicast = ipv6_addr_is_multicast(loc_addr);
80 if (inet_sk(sk)->inet_num == num) {
82 if (!net_eq(sock_net(sk), net))
85 if (!ipv6_addr_any(&sk->sk_v6_daddr) &&
86 !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr))
89 if (sk->sk_bound_dev_if &&
90 sk->sk_bound_dev_if != dif &&
91 sk->sk_bound_dev_if != sdif)
94 if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
95 if (ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))
98 inet6_mc_check(sk, loc_addr, rmt_addr))
108 EXPORT_SYMBOL_GPL(__raw_v6_lookup);
114 static int icmpv6_filter(const struct sock *sk, const struct sk_buff *skb)
116 struct icmp6hdr _hdr;
117 const struct icmp6hdr *hdr;
119 /* We require only the four bytes of the ICMPv6 header, not any
120 * additional bytes of message body in "struct icmp6hdr".
122 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
123 ICMPV6_HDRLEN, &_hdr);
125 const __u32 *data = &raw6_sk(sk)->filter.data[0];
126 unsigned int type = hdr->icmp6_type;
128 return (data[type >> 5] & (1U << (type & 31))) != 0;
133 #if IS_ENABLED(CONFIG_IPV6_MIP6)
134 typedef int mh_filter_t(struct sock *sock, struct sk_buff *skb);
136 static mh_filter_t __rcu *mh_filter __read_mostly;
138 int rawv6_mh_filter_register(mh_filter_t filter)
140 rcu_assign_pointer(mh_filter, filter);
143 EXPORT_SYMBOL(rawv6_mh_filter_register);
145 int rawv6_mh_filter_unregister(mh_filter_t filter)
147 RCU_INIT_POINTER(mh_filter, NULL);
151 EXPORT_SYMBOL(rawv6_mh_filter_unregister);
156 * demultiplex raw sockets.
157 * (should consider queueing the skb in the sock receive_queue
158 * without calling rawv6.c)
160 * Caller owns SKB so we must make clones.
162 static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
164 const struct in6_addr *saddr;
165 const struct in6_addr *daddr;
167 bool delivered = false;
171 saddr = &ipv6_hdr(skb)->saddr;
174 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
176 read_lock(&raw_v6_hashinfo.lock);
177 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
182 net = dev_net(skb->dev);
183 sk = __raw_v6_lookup(net, sk, nexthdr, daddr, saddr,
184 inet6_iif(skb), inet6_sdif(skb));
192 filtered = icmpv6_filter(sk, skb);
195 #if IS_ENABLED(CONFIG_IPV6_MIP6)
198 /* XXX: To validate MH only once for each packet,
199 * this is placed here. It should be after checking
200 * xfrm policy, however it doesn't. The checking xfrm
201 * policy is placed in rawv6_rcv() because it is
202 * required for each socket.
206 filter = rcu_dereference(mh_filter);
207 filtered = filter ? (*filter)(sk, skb) : 0;
219 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
221 /* Not releasing hash table! */
224 rawv6_rcv(sk, clone);
227 sk = __raw_v6_lookup(net, sk_next(sk), nexthdr, daddr, saddr,
228 inet6_iif(skb), inet6_sdif(skb));
231 read_unlock(&raw_v6_hashinfo.lock);
235 bool raw6_local_deliver(struct sk_buff *skb, int nexthdr)
239 raw_sk = sk_head(&raw_v6_hashinfo.ht[nexthdr & (RAW_HTABLE_SIZE - 1)]);
240 if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
243 return raw_sk != NULL;
246 /* This cleans up af_inet6 a bit. -DaveM */
247 static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
249 struct inet_sock *inet = inet_sk(sk);
250 struct ipv6_pinfo *np = inet6_sk(sk);
251 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr;
256 if (addr_len < SIN6_LEN_RFC2133)
259 if (addr->sin6_family != AF_INET6)
262 addr_type = ipv6_addr_type(&addr->sin6_addr);
264 /* Raw sockets are IPv6 only */
265 if (addr_type == IPV6_ADDR_MAPPED)
266 return -EADDRNOTAVAIL;
271 if (sk->sk_state != TCP_CLOSE)
275 /* Check if the address belongs to the host. */
276 if (addr_type != IPV6_ADDR_ANY) {
277 struct net_device *dev = NULL;
279 if (__ipv6_addr_needs_scope_id(addr_type)) {
280 if (addr_len >= sizeof(struct sockaddr_in6) &&
281 addr->sin6_scope_id) {
282 /* Override any existing binding, if another
283 * one is supplied by user.
285 sk->sk_bound_dev_if = addr->sin6_scope_id;
288 /* Binding to link-local address requires an interface */
289 if (!sk->sk_bound_dev_if)
293 if (sk->sk_bound_dev_if) {
295 dev = dev_get_by_index_rcu(sock_net(sk),
296 sk->sk_bound_dev_if);
301 /* ipv4 addr of the socket is invalid. Only the
302 * unspecified and mapped address have a v4 equivalent.
304 v4addr = LOOPBACK4_IPV6;
305 if (!(addr_type & IPV6_ADDR_MULTICAST) &&
306 !sock_net(sk)->ipv6.sysctl.ip_nonlocal_bind) {
307 err = -EADDRNOTAVAIL;
308 if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
315 inet->inet_rcv_saddr = inet->inet_saddr = v4addr;
316 sk->sk_v6_rcv_saddr = addr->sin6_addr;
317 if (!(addr_type & IPV6_ADDR_MULTICAST))
318 np->saddr = addr->sin6_addr;
327 static void rawv6_err(struct sock *sk, struct sk_buff *skb,
328 struct inet6_skb_parm *opt,
329 u8 type, u8 code, int offset, __be32 info)
331 struct inet_sock *inet = inet_sk(sk);
332 struct ipv6_pinfo *np = inet6_sk(sk);
336 /* Report error on raw socket, if:
337 1. User requested recverr.
338 2. Socket is connected (otherwise the error indication
339 is useless without recverr and error is hard.
341 if (!np->recverr && sk->sk_state != TCP_ESTABLISHED)
344 harderr = icmpv6_err_convert(type, code, &err);
345 if (type == ICMPV6_PKT_TOOBIG) {
346 ip6_sk_update_pmtu(skb, sk, info);
347 harderr = (np->pmtudisc == IPV6_PMTUDISC_DO);
349 if (type == NDISC_REDIRECT) {
350 ip6_sk_redirect(skb, sk);
354 u8 *payload = skb->data;
357 ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload);
360 if (np->recverr || harderr) {
362 sk->sk_error_report(sk);
366 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
367 u8 type, u8 code, int inner_offset, __be32 info)
371 const struct in6_addr *saddr, *daddr;
374 hash = nexthdr & (RAW_HTABLE_SIZE - 1);
376 read_lock(&raw_v6_hashinfo.lock);
377 sk = sk_head(&raw_v6_hashinfo.ht[hash]);
379 /* Note: ipv6_hdr(skb) != skb->data */
380 const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
381 saddr = &ip6h->saddr;
382 daddr = &ip6h->daddr;
383 net = dev_net(skb->dev);
385 while ((sk = __raw_v6_lookup(net, sk, nexthdr, saddr, daddr,
386 inet6_iif(skb), inet6_iif(skb)))) {
387 rawv6_err(sk, skb, NULL, type, code,
392 read_unlock(&raw_v6_hashinfo.lock);
395 static inline int rawv6_rcv_skb(struct sock *sk, struct sk_buff *skb)
397 if ((raw6_sk(sk)->checksum || rcu_access_pointer(sk->sk_filter)) &&
398 skb_checksum_complete(skb)) {
399 atomic_inc(&sk->sk_drops);
404 /* Charge it to the socket. */
406 if (sock_queue_rcv_skb(sk, skb) < 0) {
415 * This is next to useless...
416 * if we demultiplex in network layer we don't need the extra call
417 * just to queue the skb...
418 * maybe we could have the network decide upon a hint if it
419 * should call raw_rcv for demultiplexing
421 int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
423 struct inet_sock *inet = inet_sk(sk);
424 struct raw6_sock *rp = raw6_sk(sk);
426 if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
427 atomic_inc(&sk->sk_drops);
433 skb->ip_summed = CHECKSUM_UNNECESSARY;
435 if (skb->ip_summed == CHECKSUM_COMPLETE) {
436 skb_postpull_rcsum(skb, skb_network_header(skb),
437 skb_network_header_len(skb));
438 if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
439 &ipv6_hdr(skb)->daddr,
440 skb->len, inet->inet_num, skb->csum))
441 skb->ip_summed = CHECKSUM_UNNECESSARY;
443 if (!skb_csum_unnecessary(skb))
444 skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
445 &ipv6_hdr(skb)->daddr,
450 if (skb_checksum_complete(skb)) {
451 atomic_inc(&sk->sk_drops);
457 rawv6_rcv_skb(sk, skb);
463 * This should be easy, if there is something there
464 * we return it, otherwise we block.
467 static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
468 int noblock, int flags, int *addr_len)
470 struct ipv6_pinfo *np = inet6_sk(sk);
471 DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
479 if (flags & MSG_ERRQUEUE)
480 return ipv6_recv_error(sk, msg, len, addr_len);
482 if (np->rxpmtu && np->rxopt.bits.rxpmtu)
483 return ipv6_recv_rxpmtu(sk, msg, len, addr_len);
485 skb = skb_recv_datagram(sk, flags, noblock, &err);
492 msg->msg_flags |= MSG_TRUNC;
495 if (skb_csum_unnecessary(skb)) {
496 err = skb_copy_datagram_msg(skb, 0, msg, copied);
497 } else if (msg->msg_flags&MSG_TRUNC) {
498 if (__skb_checksum_complete(skb))
500 err = skb_copy_datagram_msg(skb, 0, msg, copied);
502 err = skb_copy_and_csum_datagram_msg(skb, 0, msg);
509 /* Copy the address. */
511 sin6->sin6_family = AF_INET6;
513 sin6->sin6_addr = ipv6_hdr(skb)->saddr;
514 sin6->sin6_flowinfo = 0;
515 sin6->sin6_scope_id = ipv6_iface_scope_id(&sin6->sin6_addr,
517 *addr_len = sizeof(*sin6);
520 sock_recv_ts_and_drops(msg, sk, skb);
523 ip6_datagram_recv_ctl(sk, msg, skb);
526 if (flags & MSG_TRUNC)
530 skb_free_datagram(sk, skb);
535 skb_kill_datagram(sk, skb, flags);
537 /* Error for blocking case is chosen to masquerade
538 as some normal condition.
540 err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH;
544 static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
545 struct raw6_sock *rp)
558 skb = skb_peek(&sk->sk_write_queue);
563 total_len = inet_sk(sk)->cork.base.length;
564 if (offset >= total_len - 1) {
566 ip6_flush_pending_frames(sk);
570 /* should be check HW csum miyazawa */
571 if (skb_queue_len(&sk->sk_write_queue) == 1) {
573 * Only one fragment on the socket.
575 tmp_csum = skb->csum;
577 struct sk_buff *csum_skb = NULL;
580 skb_queue_walk(&sk->sk_write_queue, skb) {
581 tmp_csum = csum_add(tmp_csum, skb->csum);
586 len = skb->len - skb_transport_offset(skb);
598 offset += skb_transport_offset(skb);
599 err = skb_copy_bits(skb, offset, &csum, 2);
601 ip6_flush_pending_frames(sk);
605 /* in case cksum was not initialized */
607 tmp_csum = csum_sub(tmp_csum, csum_unfold(csum));
609 csum = csum_ipv6_magic(&fl6->saddr, &fl6->daddr,
610 total_len, fl6->flowi6_proto, tmp_csum);
612 if (csum == 0 && fl6->flowi6_proto == IPPROTO_UDP)
613 csum = CSUM_MANGLED_0;
615 BUG_ON(skb_store_bits(skb, offset, &csum, 2));
618 err = ip6_push_pending_frames(sk);
623 static int rawv6_send_hdrinc(struct sock *sk, struct msghdr *msg, int length,
624 struct flowi6 *fl6, struct dst_entry **dstp,
625 unsigned int flags, const struct sockcm_cookie *sockc)
627 struct ipv6_pinfo *np = inet6_sk(sk);
628 struct net *net = sock_net(sk);
632 struct rt6_info *rt = (struct rt6_info *)*dstp;
633 int hlen = LL_RESERVED_SPACE(rt->dst.dev);
634 int tlen = rt->dst.dev->needed_tailroom;
636 if (length > rt->dst.dev->mtu) {
637 ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
640 if (length < sizeof(struct ipv6hdr))
645 skb = sock_alloc_send_skb(sk,
646 length + hlen + tlen + 15,
647 flags & MSG_DONTWAIT, &err);
650 skb_reserve(skb, hlen);
652 skb->protocol = htons(ETH_P_IPV6);
653 skb->priority = sk->sk_priority;
654 skb->mark = sk->sk_mark;
656 skb_put(skb, length);
657 skb_reset_network_header(skb);
660 skb->ip_summed = CHECKSUM_NONE;
662 skb_setup_tx_timestamp(skb, sockc->tsflags);
664 if (flags & MSG_CONFIRM)
665 skb_set_dst_pending_confirm(skb, 1);
667 skb->transport_header = skb->network_header;
668 err = memcpy_from_msg(iph, msg, length);
675 skb_dst_set(skb, &rt->dst);
678 /* if egress device is enslaved to an L3 master device pass the
679 * skb to its handler for processing
681 skb = l3mdev_ip6_out(sk, skb);
685 /* Acquire rcu_read_lock() in case we need to use rt->rt6i_idev
686 * in the error path. Since skb has been freed, the dst could
687 * have been queued for deletion.
690 IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
691 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, skb,
692 NULL, rt->dst.dev, dst_output);
694 err = net_xmit_errno(err);
696 IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
705 IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
707 if (err == -ENOBUFS && !np->recverr)
712 struct raw6_frag_vec {
718 static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6)
721 switch (fl6->flowi6_proto) {
724 err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
726 fl6->fl6_icmp_type = rfv->c[0];
727 fl6->fl6_icmp_code = rfv->c[1];
732 err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
734 fl6->fl6_mh_type = rfv->c[2];
739 static int raw6_getfrag(void *from, char *to, int offset, int len, int odd,
742 struct raw6_frag_vec *rfv = from;
744 if (offset < rfv->hlen) {
745 int copy = min(rfv->hlen - offset, len);
747 if (skb->ip_summed == CHECKSUM_PARTIAL)
748 memcpy(to, rfv->c + offset, copy);
750 skb->csum = csum_block_add(
752 csum_partial_copy_nocheck(rfv->c + offset,
767 return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
770 static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
772 struct ipv6_txoptions *opt_to_free = NULL;
773 struct ipv6_txoptions opt_space;
774 DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name);
775 struct in6_addr *daddr, *final_p, final;
776 struct inet_sock *inet = inet_sk(sk);
777 struct ipv6_pinfo *np = inet6_sk(sk);
778 struct raw6_sock *rp = raw6_sk(sk);
779 struct ipv6_txoptions *opt = NULL;
780 struct ip6_flowlabel *flowlabel = NULL;
781 struct dst_entry *dst = NULL;
782 struct raw6_frag_vec rfv;
784 struct sockcm_cookie sockc;
785 struct ipcm6_cookie ipc6;
786 int addr_len = msg->msg_namelen;
791 /* Rough check on arithmetic overflow,
792 better check is made in ip6_append_data().
797 /* Mirror BSD error message compatibility */
798 if (msg->msg_flags & MSG_OOB)
801 /* hdrincl should be READ_ONCE(inet->hdrincl)
802 * but READ_ONCE() doesn't work with bit fields.
803 * Doing this indirectly yields the same result.
805 hdrincl = inet->hdrincl;
806 hdrincl = READ_ONCE(hdrincl);
809 * Get and verify the address.
811 memset(&fl6, 0, sizeof(fl6));
813 fl6.flowi6_mark = sk->sk_mark;
814 fl6.flowi6_uid = sk->sk_uid;
822 if (addr_len < SIN6_LEN_RFC2133)
825 if (sin6->sin6_family && sin6->sin6_family != AF_INET6)
826 return -EAFNOSUPPORT;
828 /* port is the proto value [0..255] carried in nexthdr */
829 proto = ntohs(sin6->sin6_port);
832 proto = inet->inet_num;
833 else if (proto != inet->inet_num)
839 daddr = &sin6->sin6_addr;
841 fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
842 if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
843 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
850 * Otherwise it will be difficult to maintain
853 if (sk->sk_state == TCP_ESTABLISHED &&
854 ipv6_addr_equal(daddr, &sk->sk_v6_daddr))
855 daddr = &sk->sk_v6_daddr;
857 if (addr_len >= sizeof(struct sockaddr_in6) &&
858 sin6->sin6_scope_id &&
859 __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
860 fl6.flowi6_oif = sin6->sin6_scope_id;
862 if (sk->sk_state != TCP_ESTABLISHED)
863 return -EDESTADDRREQ;
865 proto = inet->inet_num;
866 daddr = &sk->sk_v6_daddr;
867 fl6.flowlabel = np->flow_label;
870 if (fl6.flowi6_oif == 0)
871 fl6.flowi6_oif = sk->sk_bound_dev_if;
873 sockc.tsflags = sk->sk_tsflags;
874 if (msg->msg_controllen) {
876 memset(opt, 0, sizeof(struct ipv6_txoptions));
877 opt->tot_len = sizeof(struct ipv6_txoptions);
880 err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6, &sockc);
882 fl6_sock_release(flowlabel);
885 if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
886 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
890 if (!(opt->opt_nflen|opt->opt_flen))
898 opt = fl6_merge_options(&opt_space, flowlabel, opt);
899 opt = ipv6_fixup_options(&opt_space, opt);
901 fl6.flowi6_proto = proto;
906 err = rawv6_probe_proto_opt(&rfv, &fl6);
911 if (!ipv6_addr_any(daddr))
914 fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
915 if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
916 fl6.saddr = np->saddr;
918 final_p = fl6_update_dst(&fl6, opt, &final);
920 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
921 fl6.flowi6_oif = np->mcast_oif;
922 else if (!fl6.flowi6_oif)
923 fl6.flowi6_oif = np->ucast_oif;
924 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
927 fl6.flowi6_flags |= FLOWI_FLAG_KNOWN_NH;
930 ipc6.tclass = np->tclass;
932 fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
934 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
940 ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
942 if (ipc6.dontfrag < 0)
943 ipc6.dontfrag = np->dontfrag;
945 if (msg->msg_flags&MSG_CONFIRM)
950 err = rawv6_send_hdrinc(sk, msg, len, &fl6, &dst,
951 msg->msg_flags, &sockc);
955 err = ip6_append_data(sk, raw6_getfrag, &rfv,
956 len, 0, &ipc6, &fl6, (struct rt6_info *)dst,
957 msg->msg_flags, &sockc);
960 ip6_flush_pending_frames(sk);
961 else if (!(msg->msg_flags & MSG_MORE))
962 err = rawv6_push_pending_frames(sk, &fl6, rp);
968 fl6_sock_release(flowlabel);
969 txopt_put(opt_to_free);
970 return err < 0 ? err : len;
972 if (msg->msg_flags & MSG_PROBE)
973 dst_confirm_neigh(dst, &fl6.daddr);
974 if (!(msg->msg_flags & MSG_PROBE) || len)
975 goto back_from_confirm;
980 static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
981 char __user *optval, int optlen)
985 if (optlen > sizeof(struct icmp6_filter))
986 optlen = sizeof(struct icmp6_filter);
987 if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen))
997 static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
998 char __user *optval, int __user *optlen)
1004 if (get_user(len, optlen))
1008 if (len > sizeof(struct icmp6_filter))
1009 len = sizeof(struct icmp6_filter);
1010 if (put_user(len, optlen))
1012 if (copy_to_user(optval, &raw6_sk(sk)->filter, len))
1016 return -ENOPROTOOPT;
1023 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
1024 char __user *optval, unsigned int optlen)
1026 struct raw6_sock *rp = raw6_sk(sk);
1029 if (get_user(val, (int __user *)optval))
1034 if (sk->sk_type != SOCK_RAW)
1036 inet_sk(sk)->hdrincl = !!val;
1039 if (inet_sk(sk)->inet_num == IPPROTO_ICMPV6 &&
1040 level == IPPROTO_IPV6) {
1042 * RFC3542 tells that IPV6_CHECKSUM socket
1043 * option in the IPPROTO_IPV6 level is not
1044 * allowed on ICMPv6 sockets.
1045 * If you want to set it, use IPPROTO_RAW
1046 * level IPV6_CHECKSUM socket option
1047 * (Linux extension).
1052 /* You may get strange result with a positive odd offset;
1053 RFC2292bis agrees with me. */
1054 if (val > 0 && (val&1))
1066 return -ENOPROTOOPT;
1070 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
1071 char __user *optval, unsigned int optlen)
1078 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1080 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1082 if (optname == IPV6_CHECKSUM ||
1083 optname == IPV6_HDRINCL)
1086 return ipv6_setsockopt(sk, level, optname, optval, optlen);
1089 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1092 #ifdef CONFIG_COMPAT
1093 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
1094 char __user *optval, unsigned int optlen)
1100 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1102 return rawv6_seticmpfilter(sk, level, optname, optval, optlen);
1104 if (optname == IPV6_CHECKSUM ||
1105 optname == IPV6_HDRINCL)
1108 return compat_ipv6_setsockopt(sk, level, optname,
1111 return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
1115 static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
1116 char __user *optval, int __user *optlen)
1118 struct raw6_sock *rp = raw6_sk(sk);
1121 if (get_user(len, optlen))
1126 val = inet_sk(sk)->hdrincl;
1130 * We allow getsockopt() for IPPROTO_IPV6-level
1131 * IPV6_CHECKSUM socket option on ICMPv6 sockets
1132 * since RFC3542 is silent about it.
1134 if (rp->checksum == 0)
1141 return -ENOPROTOOPT;
1144 len = min_t(unsigned int, sizeof(int), len);
1146 if (put_user(len, optlen))
1148 if (copy_to_user(optval, &val, len))
1153 static int rawv6_getsockopt(struct sock *sk, int level, int optname,
1154 char __user *optval, int __user *optlen)
1161 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1163 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1165 if (optname == IPV6_CHECKSUM ||
1166 optname == IPV6_HDRINCL)
1169 return ipv6_getsockopt(sk, level, optname, optval, optlen);
1172 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1175 #ifdef CONFIG_COMPAT
1176 static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
1177 char __user *optval, int __user *optlen)
1183 if (inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
1185 return rawv6_geticmpfilter(sk, level, optname, optval, optlen);
1187 if (optname == IPV6_CHECKSUM ||
1188 optname == IPV6_HDRINCL)
1191 return compat_ipv6_getsockopt(sk, level, optname,
1194 return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
1198 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
1202 int amount = sk_wmem_alloc_get(sk);
1204 return put_user(amount, (int __user *)arg);
1207 struct sk_buff *skb;
1210 spin_lock_bh(&sk->sk_receive_queue.lock);
1211 skb = skb_peek(&sk->sk_receive_queue);
1214 spin_unlock_bh(&sk->sk_receive_queue.lock);
1215 return put_user(amount, (int __user *)arg);
1219 #ifdef CONFIG_IPV6_MROUTE
1220 return ip6mr_ioctl(sk, cmd, (void __user *)arg);
1222 return -ENOIOCTLCMD;
1227 #ifdef CONFIG_COMPAT
1228 static int compat_rawv6_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
1233 return -ENOIOCTLCMD;
1235 #ifdef CONFIG_IPV6_MROUTE
1236 return ip6mr_compat_ioctl(sk, cmd, compat_ptr(arg));
1238 return -ENOIOCTLCMD;
1244 static void rawv6_close(struct sock *sk, long timeout)
1246 if (inet_sk(sk)->inet_num == IPPROTO_RAW)
1247 ip6_ra_control(sk, -1);
1249 sk_common_release(sk);
1252 static void raw6_destroy(struct sock *sk)
1255 ip6_flush_pending_frames(sk);
1258 inet6_destroy_sock(sk);
1261 static int rawv6_init_sk(struct sock *sk)
1263 struct raw6_sock *rp = raw6_sk(sk);
1265 switch (inet_sk(sk)->inet_num) {
1266 case IPPROTO_ICMPV6:
1280 struct proto rawv6_prot = {
1282 .owner = THIS_MODULE,
1283 .close = rawv6_close,
1284 .destroy = raw6_destroy,
1285 .connect = ip6_datagram_connect_v6_only,
1286 .disconnect = __udp_disconnect,
1287 .ioctl = rawv6_ioctl,
1288 .init = rawv6_init_sk,
1289 .setsockopt = rawv6_setsockopt,
1290 .getsockopt = rawv6_getsockopt,
1291 .sendmsg = rawv6_sendmsg,
1292 .recvmsg = rawv6_recvmsg,
1294 .backlog_rcv = rawv6_rcv_skb,
1295 .hash = raw_hash_sk,
1296 .unhash = raw_unhash_sk,
1297 .obj_size = sizeof(struct raw6_sock),
1298 .h.raw_hash = &raw_v6_hashinfo,
1299 #ifdef CONFIG_COMPAT
1300 .compat_setsockopt = compat_rawv6_setsockopt,
1301 .compat_getsockopt = compat_rawv6_getsockopt,
1302 .compat_ioctl = compat_rawv6_ioctl,
1304 .diag_destroy = raw_abort,
1307 #ifdef CONFIG_PROC_FS
1308 static int raw6_seq_show(struct seq_file *seq, void *v)
1310 if (v == SEQ_START_TOKEN) {
1311 seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
1313 struct sock *sp = v;
1314 __u16 srcp = inet_sk(sp)->inet_num;
1315 ip6_dgram_sock_seq_show(seq, v, srcp, 0,
1316 raw_seq_private(seq)->bucket);
1321 static const struct seq_operations raw6_seq_ops = {
1322 .start = raw_seq_start,
1323 .next = raw_seq_next,
1324 .stop = raw_seq_stop,
1325 .show = raw6_seq_show,
1328 static int raw6_seq_open(struct inode *inode, struct file *file)
1330 return raw_seq_open(inode, file, &raw_v6_hashinfo, &raw6_seq_ops);
1333 static const struct file_operations raw6_seq_fops = {
1334 .owner = THIS_MODULE,
1335 .open = raw6_seq_open,
1337 .llseek = seq_lseek,
1338 .release = seq_release_net,
1341 static int __net_init raw6_init_net(struct net *net)
1343 if (!proc_create("raw6", S_IRUGO, net->proc_net, &raw6_seq_fops))
1349 static void __net_exit raw6_exit_net(struct net *net)
1351 remove_proc_entry("raw6", net->proc_net);
1354 static struct pernet_operations raw6_net_ops = {
1355 .init = raw6_init_net,
1356 .exit = raw6_exit_net,
1359 int __init raw6_proc_init(void)
1361 return register_pernet_subsys(&raw6_net_ops);
1364 void raw6_proc_exit(void)
1366 unregister_pernet_subsys(&raw6_net_ops);
1368 #endif /* CONFIG_PROC_FS */
1370 /* Same as inet6_dgram_ops, sans udp_poll. */
1371 const struct proto_ops inet6_sockraw_ops = {
1373 .owner = THIS_MODULE,
1374 .release = inet6_release,
1376 .connect = inet_dgram_connect, /* ok */
1377 .socketpair = sock_no_socketpair, /* a do nothing */
1378 .accept = sock_no_accept, /* a do nothing */
1379 .getname = inet6_getname,
1380 .poll = datagram_poll, /* ok */
1381 .ioctl = inet6_ioctl, /* must change */
1382 .listen = sock_no_listen, /* ok */
1383 .shutdown = inet_shutdown, /* ok */
1384 .setsockopt = sock_common_setsockopt, /* ok */
1385 .getsockopt = sock_common_getsockopt, /* ok */
1386 .sendmsg = inet_sendmsg, /* ok */
1387 .recvmsg = sock_common_recvmsg, /* ok */
1388 .mmap = sock_no_mmap,
1389 .sendpage = sock_no_sendpage,
1390 #ifdef CONFIG_COMPAT
1391 .compat_setsockopt = compat_sock_common_setsockopt,
1392 .compat_getsockopt = compat_sock_common_getsockopt,
1396 static struct inet_protosw rawv6_protosw = {
1398 .protocol = IPPROTO_IP, /* wild card */
1399 .prot = &rawv6_prot,
1400 .ops = &inet6_sockraw_ops,
1401 .flags = INET_PROTOSW_REUSE,
1404 int __init rawv6_init(void)
1406 return inet6_register_protosw(&rawv6_protosw);
1409 void rawv6_exit(void)
1411 inet6_unregister_protosw(&rawv6_protosw);