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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * RAW - implementation of IP "raw" sockets.
8 *
9 * Authors: Ross Biro
10 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
11 *
12 * Fixes:
13 * Alan Cox : verify_area() fixed up
14 * Alan Cox : ICMP error handling
15 * Alan Cox : EMSGSIZE if you send too big a packet
16 * Alan Cox : Now uses generic datagrams and shared
17 * skbuff library. No more peek crashes,
18 * no more backlogs
19 * Alan Cox : Checks sk->broadcast.
20 * Alan Cox : Uses skb_free_datagram/skb_copy_datagram
21 * Alan Cox : Raw passes ip options too
22 * Alan Cox : Setsocketopt added
23 * Alan Cox : Fixed error return for broadcasts
24 * Alan Cox : Removed wake_up calls
25 * Alan Cox : Use ttl/tos
26 * Alan Cox : Cleaned up old debugging
27 * Alan Cox : Use new kernel side addresses
28 * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets.
29 * Alan Cox : BSD style RAW socket demultiplexing.
30 * Alan Cox : Beginnings of mrouted support.
31 * Alan Cox : Added IP_HDRINCL option.
32 * Alan Cox : Skip broadcast check if BSDism set.
33 * David S. Miller : New socket lookup architecture.
34 */
35
36#include <linux/types.h>
37#include <linux/atomic.h>
38#include <asm/byteorder.h>
39#include <asm/current.h>
40#include <linux/uaccess.h>
41#include <asm/ioctls.h>
42#include <linux/stddef.h>
43#include <linux/slab.h>
44#include <linux/errno.h>
45#include <linux/kernel.h>
46#include <linux/export.h>
47#include <linux/spinlock.h>
48#include <linux/sockios.h>
49#include <linux/socket.h>
50#include <linux/in.h>
51#include <linux/mroute.h>
52#include <linux/netdevice.h>
53#include <linux/in_route.h>
54#include <linux/route.h>
55#include <linux/skbuff.h>
56#include <linux/igmp.h>
57#include <net/net_namespace.h>
58#include <net/dst.h>
59#include <net/sock.h>
60#include <linux/ip.h>
61#include <linux/net.h>
62#include <net/ip.h>
63#include <net/icmp.h>
64#include <net/udp.h>
65#include <net/raw.h>
66#include <net/snmp.h>
67#include <net/tcp_states.h>
68#include <net/inet_common.h>
69#include <net/checksum.h>
70#include <net/xfrm.h>
71#include <linux/rtnetlink.h>
72#include <linux/proc_fs.h>
73#include <linux/seq_file.h>
74#include <linux/netfilter.h>
75#include <linux/netfilter_ipv4.h>
76#include <linux/compat.h>
77#include <linux/uio.h>
78
79struct raw_frag_vec {
80 struct msghdr *msg;
81 union {
82 struct icmphdr icmph;
83 char c[1];
84 } hdr;
85 int hlen;
86};
87
88struct raw_hashinfo raw_v4_hashinfo;
89EXPORT_SYMBOL_GPL(raw_v4_hashinfo);
90
91int raw_hash_sk(struct sock *sk)
92{
93 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
94 struct hlist_head *hlist;
95
96 hlist = &h->ht[raw_hashfunc(sock_net(sk), inet_sk(sk)->inet_num)];
97
98 spin_lock(&h->lock);
99 sk_add_node_rcu(sk, hlist);
100 sock_set_flag(sk, SOCK_RCU_FREE);
101 spin_unlock(&h->lock);
102 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
103
104 return 0;
105}
106EXPORT_SYMBOL_GPL(raw_hash_sk);
107
108void raw_unhash_sk(struct sock *sk)
109{
110 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
111
112 spin_lock(&h->lock);
113 if (sk_del_node_init_rcu(sk))
114 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
115 spin_unlock(&h->lock);
116}
117EXPORT_SYMBOL_GPL(raw_unhash_sk);
118
119bool raw_v4_match(struct net *net, const struct sock *sk, unsigned short num,
120 __be32 raddr, __be32 laddr, int dif, int sdif)
121{
122 const struct inet_sock *inet = inet_sk(sk);
123
124 if (net_eq(sock_net(sk), net) && inet->inet_num == num &&
125 !(inet->inet_daddr && inet->inet_daddr != raddr) &&
126 !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) &&
127 raw_sk_bound_dev_eq(net, sk->sk_bound_dev_if, dif, sdif))
128 return true;
129 return false;
130}
131EXPORT_SYMBOL_GPL(raw_v4_match);
132
133/*
134 * 0 - deliver
135 * 1 - block
136 */
137static int icmp_filter(const struct sock *sk, const struct sk_buff *skb)
138{
139 struct icmphdr _hdr;
140 const struct icmphdr *hdr;
141
142 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
143 sizeof(_hdr), &_hdr);
144 if (!hdr)
145 return 1;
146
147 if (hdr->type < 32) {
148 __u32 data = raw_sk(sk)->filter.data;
149
150 return ((1U << hdr->type) & data) != 0;
151 }
152
153 /* Do not block unknown ICMP types */
154 return 0;
155}
156
157/* IP input processing comes here for RAW socket delivery.
158 * Caller owns SKB, so we must make clones.
159 *
160 * RFC 1122: SHOULD pass TOS value up to the transport layer.
161 * -> It does. And not only TOS, but all IP header.
162 */
163static int raw_v4_input(struct net *net, struct sk_buff *skb,
164 const struct iphdr *iph, int hash)
165{
166 int sdif = inet_sdif(skb);
167 struct hlist_head *hlist;
168 int dif = inet_iif(skb);
169 int delivered = 0;
170 struct sock *sk;
171
172 hlist = &raw_v4_hashinfo.ht[hash];
173 rcu_read_lock();
174 sk_for_each_rcu(sk, hlist) {
175 if (!raw_v4_match(net, sk, iph->protocol,
176 iph->saddr, iph->daddr, dif, sdif))
177 continue;
178 delivered = 1;
179 if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) &&
180 ip_mc_sf_allow(sk, iph->daddr, iph->saddr,
181 skb->dev->ifindex, sdif)) {
182 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
183
184 /* Not releasing hash table! */
185 if (clone)
186 raw_rcv(sk, clone);
187 }
188 }
189 rcu_read_unlock();
190 return delivered;
191}
192
193int raw_local_deliver(struct sk_buff *skb, int protocol)
194{
195 struct net *net = dev_net(skb->dev);
196
197 return raw_v4_input(net, skb, ip_hdr(skb),
198 raw_hashfunc(net, protocol));
199}
200
201static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
202{
203 struct inet_sock *inet = inet_sk(sk);
204 const int type = icmp_hdr(skb)->type;
205 const int code = icmp_hdr(skb)->code;
206 int harderr = 0;
207 bool recverr;
208 int err = 0;
209
210 if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED)
211 ipv4_sk_update_pmtu(skb, sk, info);
212 else if (type == ICMP_REDIRECT) {
213 ipv4_sk_redirect(skb, sk);
214 return;
215 }
216
217 /* Report error on raw socket, if:
218 1. User requested ip_recverr.
219 2. Socket is connected (otherwise the error indication
220 is useless without ip_recverr and error is hard.
221 */
222 recverr = inet_test_bit(RECVERR, sk);
223 if (!recverr && sk->sk_state != TCP_ESTABLISHED)
224 return;
225
226 switch (type) {
227 default:
228 case ICMP_TIME_EXCEEDED:
229 err = EHOSTUNREACH;
230 break;
231 case ICMP_SOURCE_QUENCH:
232 return;
233 case ICMP_PARAMETERPROB:
234 err = EPROTO;
235 harderr = 1;
236 break;
237 case ICMP_DEST_UNREACH:
238 err = EHOSTUNREACH;
239 if (code > NR_ICMP_UNREACH)
240 break;
241 if (code == ICMP_FRAG_NEEDED) {
242 harderr = READ_ONCE(inet->pmtudisc) != IP_PMTUDISC_DONT;
243 err = EMSGSIZE;
244 } else {
245 err = icmp_err_convert[code].errno;
246 harderr = icmp_err_convert[code].fatal;
247 }
248 }
249
250 if (recverr) {
251 const struct iphdr *iph = (const struct iphdr *)skb->data;
252 u8 *payload = skb->data + (iph->ihl << 2);
253
254 if (inet_test_bit(HDRINCL, sk))
255 payload = skb->data;
256 ip_icmp_error(sk, skb, err, 0, info, payload);
257 }
258
259 if (recverr || harderr) {
260 sk->sk_err = err;
261 sk_error_report(sk);
262 }
263}
264
265void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
266{
267 struct net *net = dev_net(skb->dev);
268 int dif = skb->dev->ifindex;
269 int sdif = inet_sdif(skb);
270 struct hlist_head *hlist;
271 const struct iphdr *iph;
272 struct sock *sk;
273 int hash;
274
275 hash = raw_hashfunc(net, protocol);
276 hlist = &raw_v4_hashinfo.ht[hash];
277
278 rcu_read_lock();
279 sk_for_each_rcu(sk, hlist) {
280 iph = (const struct iphdr *)skb->data;
281 if (!raw_v4_match(net, sk, iph->protocol,
282 iph->daddr, iph->saddr, dif, sdif))
283 continue;
284 raw_err(sk, skb, info);
285 }
286 rcu_read_unlock();
287}
288
289static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
290{
291 enum skb_drop_reason reason;
292
293 /* Charge it to the socket. */
294
295 ipv4_pktinfo_prepare(sk, skb, true);
296 if (sock_queue_rcv_skb_reason(sk, skb, &reason) < 0) {
297 kfree_skb_reason(skb, reason);
298 return NET_RX_DROP;
299 }
300
301 return NET_RX_SUCCESS;
302}
303
304int raw_rcv(struct sock *sk, struct sk_buff *skb)
305{
306 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
307 atomic_inc(&sk->sk_drops);
308 kfree_skb_reason(skb, SKB_DROP_REASON_XFRM_POLICY);
309 return NET_RX_DROP;
310 }
311 nf_reset_ct(skb);
312
313 skb_push(skb, skb->data - skb_network_header(skb));
314
315 raw_rcv_skb(sk, skb);
316 return 0;
317}
318
319static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
320 struct msghdr *msg, size_t length,
321 struct rtable **rtp, unsigned int flags,
322 const struct sockcm_cookie *sockc)
323{
324 struct inet_sock *inet = inet_sk(sk);
325 struct net *net = sock_net(sk);
326 struct iphdr *iph;
327 struct sk_buff *skb;
328 unsigned int iphlen;
329 int err;
330 struct rtable *rt = *rtp;
331 int hlen, tlen;
332
333 if (length > rt->dst.dev->mtu) {
334 ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
335 rt->dst.dev->mtu);
336 return -EMSGSIZE;
337 }
338 if (length < sizeof(struct iphdr))
339 return -EINVAL;
340
341 if (flags&MSG_PROBE)
342 goto out;
343
344 hlen = LL_RESERVED_SPACE(rt->dst.dev);
345 tlen = rt->dst.dev->needed_tailroom;
346 skb = sock_alloc_send_skb(sk,
347 length + hlen + tlen + 15,
348 flags & MSG_DONTWAIT, &err);
349 if (!skb)
350 goto error;
351 skb_reserve(skb, hlen);
352
353 skb->priority = READ_ONCE(sk->sk_priority);
354 skb->mark = sockc->mark;
355 skb->tstamp = sockc->transmit_time;
356 skb_dst_set(skb, &rt->dst);
357 *rtp = NULL;
358
359 skb_reset_network_header(skb);
360 iph = ip_hdr(skb);
361 skb_put(skb, length);
362
363 skb->ip_summed = CHECKSUM_NONE;
364
365 skb_setup_tx_timestamp(skb, sockc->tsflags);
366
367 if (flags & MSG_CONFIRM)
368 skb_set_dst_pending_confirm(skb, 1);
369
370 skb->transport_header = skb->network_header;
371 err = -EFAULT;
372 if (memcpy_from_msg(iph, msg, length))
373 goto error_free;
374
375 iphlen = iph->ihl * 4;
376
377 /*
378 * We don't want to modify the ip header, but we do need to
379 * be sure that it won't cause problems later along the network
380 * stack. Specifically we want to make sure that iph->ihl is a
381 * sane value. If ihl points beyond the length of the buffer passed
382 * in, reject the frame as invalid
383 */
384 err = -EINVAL;
385 if (iphlen > length)
386 goto error_free;
387
388 if (iphlen >= sizeof(*iph)) {
389 if (!iph->saddr)
390 iph->saddr = fl4->saddr;
391 iph->check = 0;
392 iph->tot_len = htons(length);
393 if (!iph->id)
394 ip_select_ident(net, skb, NULL);
395
396 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
397 skb->transport_header += iphlen;
398 if (iph->protocol == IPPROTO_ICMP &&
399 length >= iphlen + sizeof(struct icmphdr))
400 icmp_out_count(net, ((struct icmphdr *)
401 skb_transport_header(skb))->type);
402 }
403
404 err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT,
405 net, sk, skb, NULL, rt->dst.dev,
406 dst_output);
407 if (err > 0)
408 err = net_xmit_errno(err);
409 if (err)
410 goto error;
411out:
412 return 0;
413
414error_free:
415 kfree_skb(skb);
416error:
417 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
418 if (err == -ENOBUFS && !inet_test_bit(RECVERR, sk))
419 err = 0;
420 return err;
421}
422
423static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4)
424{
425 int err;
426
427 if (fl4->flowi4_proto != IPPROTO_ICMP)
428 return 0;
429
430 /* We only need the first two bytes. */
431 rfv->hlen = 2;
432
433 err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen);
434 if (err)
435 return err;
436
437 fl4->fl4_icmp_type = rfv->hdr.icmph.type;
438 fl4->fl4_icmp_code = rfv->hdr.icmph.code;
439
440 return 0;
441}
442
443static int raw_getfrag(void *from, char *to, int offset, int len, int odd,
444 struct sk_buff *skb)
445{
446 struct raw_frag_vec *rfv = from;
447
448 if (offset < rfv->hlen) {
449 int copy = min(rfv->hlen - offset, len);
450
451 if (skb->ip_summed == CHECKSUM_PARTIAL)
452 memcpy(to, rfv->hdr.c + offset, copy);
453 else
454 skb->csum = csum_block_add(
455 skb->csum,
456 csum_partial_copy_nocheck(rfv->hdr.c + offset,
457 to, copy),
458 odd);
459
460 odd = 0;
461 offset += copy;
462 to += copy;
463 len -= copy;
464
465 if (!len)
466 return 0;
467 }
468
469 offset -= rfv->hlen;
470
471 return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
472}
473
474static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
475{
476 struct inet_sock *inet = inet_sk(sk);
477 struct net *net = sock_net(sk);
478 struct ipcm_cookie ipc;
479 struct rtable *rt = NULL;
480 struct flowi4 fl4;
481 u8 tos, scope;
482 int free = 0;
483 __be32 daddr;
484 __be32 saddr;
485 int uc_index, err;
486 struct ip_options_data opt_copy;
487 struct raw_frag_vec rfv;
488 int hdrincl;
489
490 err = -EMSGSIZE;
491 if (len > 0xFFFF)
492 goto out;
493
494 hdrincl = inet_test_bit(HDRINCL, sk);
495
496 /*
497 * Check the flags.
498 */
499
500 err = -EOPNOTSUPP;
501 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
502 goto out; /* compatibility */
503
504 /*
505 * Get and verify the address.
506 */
507
508 if (msg->msg_namelen) {
509 DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name);
510 err = -EINVAL;
511 if (msg->msg_namelen < sizeof(*usin))
512 goto out;
513 if (usin->sin_family != AF_INET) {
514 pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n",
515 __func__, current->comm);
516 err = -EAFNOSUPPORT;
517 if (usin->sin_family)
518 goto out;
519 }
520 daddr = usin->sin_addr.s_addr;
521 /* ANK: I did not forget to get protocol from port field.
522 * I just do not know, who uses this weirdness.
523 * IP_HDRINCL is much more convenient.
524 */
525 } else {
526 err = -EDESTADDRREQ;
527 if (sk->sk_state != TCP_ESTABLISHED)
528 goto out;
529 daddr = inet->inet_daddr;
530 }
531
532 ipcm_init_sk(&ipc, inet);
533 /* Keep backward compat */
534 if (hdrincl)
535 ipc.protocol = IPPROTO_RAW;
536
537 if (msg->msg_controllen) {
538 err = ip_cmsg_send(sk, msg, &ipc, false);
539 if (unlikely(err)) {
540 kfree(ipc.opt);
541 goto out;
542 }
543 if (ipc.opt)
544 free = 1;
545 }
546
547 saddr = ipc.addr;
548 ipc.addr = daddr;
549
550 if (!ipc.opt) {
551 struct ip_options_rcu *inet_opt;
552
553 rcu_read_lock();
554 inet_opt = rcu_dereference(inet->inet_opt);
555 if (inet_opt) {
556 memcpy(&opt_copy, inet_opt,
557 sizeof(*inet_opt) + inet_opt->opt.optlen);
558 ipc.opt = &opt_copy.opt;
559 }
560 rcu_read_unlock();
561 }
562
563 if (ipc.opt) {
564 err = -EINVAL;
565 /* Linux does not mangle headers on raw sockets,
566 * so that IP options + IP_HDRINCL is non-sense.
567 */
568 if (hdrincl)
569 goto done;
570 if (ipc.opt->opt.srr) {
571 if (!daddr)
572 goto done;
573 daddr = ipc.opt->opt.faddr;
574 }
575 }
576 tos = get_rttos(&ipc, inet);
577 scope = ip_sendmsg_scope(inet, &ipc, msg);
578
579 uc_index = READ_ONCE(inet->uc_index);
580 if (ipv4_is_multicast(daddr)) {
581 if (!ipc.oif || netif_index_is_l3_master(sock_net(sk), ipc.oif))
582 ipc.oif = READ_ONCE(inet->mc_index);
583 if (!saddr)
584 saddr = READ_ONCE(inet->mc_addr);
585 } else if (!ipc.oif) {
586 ipc.oif = uc_index;
587 } else if (ipv4_is_lbcast(daddr) && uc_index) {
588 /* oif is set, packet is to local broadcast
589 * and uc_index is set. oif is most likely set
590 * by sk_bound_dev_if. If uc_index != oif check if the
591 * oif is an L3 master and uc_index is an L3 slave.
592 * If so, we want to allow the send using the uc_index.
593 */
594 if (ipc.oif != uc_index &&
595 ipc.oif == l3mdev_master_ifindex_by_index(sock_net(sk),
596 uc_index)) {
597 ipc.oif = uc_index;
598 }
599 }
600
601 flowi4_init_output(&fl4, ipc.oif, ipc.sockc.mark, tos, scope,
602 hdrincl ? ipc.protocol : sk->sk_protocol,
603 inet_sk_flowi_flags(sk) |
604 (hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
605 daddr, saddr, 0, 0, sk->sk_uid);
606
607 if (!hdrincl) {
608 rfv.msg = msg;
609 rfv.hlen = 0;
610
611 err = raw_probe_proto_opt(&rfv, &fl4);
612 if (err)
613 goto done;
614 }
615
616 security_sk_classify_flow(sk, flowi4_to_flowi_common(&fl4));
617 rt = ip_route_output_flow(net, &fl4, sk);
618 if (IS_ERR(rt)) {
619 err = PTR_ERR(rt);
620 rt = NULL;
621 goto done;
622 }
623
624 err = -EACCES;
625 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
626 goto done;
627
628 if (msg->msg_flags & MSG_CONFIRM)
629 goto do_confirm;
630back_from_confirm:
631
632 if (hdrincl)
633 err = raw_send_hdrinc(sk, &fl4, msg, len,
634 &rt, msg->msg_flags, &ipc.sockc);
635
636 else {
637 if (!ipc.addr)
638 ipc.addr = fl4.daddr;
639 lock_sock(sk);
640 err = ip_append_data(sk, &fl4, raw_getfrag,
641 &rfv, len, 0,
642 &ipc, &rt, msg->msg_flags);
643 if (err)
644 ip_flush_pending_frames(sk);
645 else if (!(msg->msg_flags & MSG_MORE)) {
646 err = ip_push_pending_frames(sk, &fl4);
647 if (err == -ENOBUFS && !inet_test_bit(RECVERR, sk))
648 err = 0;
649 }
650 release_sock(sk);
651 }
652done:
653 if (free)
654 kfree(ipc.opt);
655 ip_rt_put(rt);
656
657out:
658 if (err < 0)
659 return err;
660 return len;
661
662do_confirm:
663 if (msg->msg_flags & MSG_PROBE)
664 dst_confirm_neigh(&rt->dst, &fl4.daddr);
665 if (!(msg->msg_flags & MSG_PROBE) || len)
666 goto back_from_confirm;
667 err = 0;
668 goto done;
669}
670
671static void raw_close(struct sock *sk, long timeout)
672{
673 /*
674 * Raw sockets may have direct kernel references. Kill them.
675 */
676 ip_ra_control(sk, 0, NULL);
677
678 sk_common_release(sk);
679}
680
681static void raw_destroy(struct sock *sk)
682{
683 lock_sock(sk);
684 ip_flush_pending_frames(sk);
685 release_sock(sk);
686}
687
688/* This gets rid of all the nasties in af_inet. -DaveM */
689static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
690{
691 struct inet_sock *inet = inet_sk(sk);
692 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
693 struct net *net = sock_net(sk);
694 u32 tb_id = RT_TABLE_LOCAL;
695 int ret = -EINVAL;
696 int chk_addr_ret;
697
698 lock_sock(sk);
699 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
700 goto out;
701
702 if (sk->sk_bound_dev_if)
703 tb_id = l3mdev_fib_table_by_index(net,
704 sk->sk_bound_dev_if) ? : tb_id;
705
706 chk_addr_ret = inet_addr_type_table(net, addr->sin_addr.s_addr, tb_id);
707
708 ret = -EADDRNOTAVAIL;
709 if (!inet_addr_valid_or_nonlocal(net, inet, addr->sin_addr.s_addr,
710 chk_addr_ret))
711 goto out;
712
713 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
714 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
715 inet->inet_saddr = 0; /* Use device */
716 sk_dst_reset(sk);
717 ret = 0;
718out:
719 release_sock(sk);
720 return ret;
721}
722
723/*
724 * This should be easy, if there is something there
725 * we return it, otherwise we block.
726 */
727
728static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
729 int flags, int *addr_len)
730{
731 struct inet_sock *inet = inet_sk(sk);
732 size_t copied = 0;
733 int err = -EOPNOTSUPP;
734 DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name);
735 struct sk_buff *skb;
736
737 if (flags & MSG_OOB)
738 goto out;
739
740 if (flags & MSG_ERRQUEUE) {
741 err = ip_recv_error(sk, msg, len, addr_len);
742 goto out;
743 }
744
745 skb = skb_recv_datagram(sk, flags, &err);
746 if (!skb)
747 goto out;
748
749 copied = skb->len;
750 if (len < copied) {
751 msg->msg_flags |= MSG_TRUNC;
752 copied = len;
753 }
754
755 err = skb_copy_datagram_msg(skb, 0, msg, copied);
756 if (err)
757 goto done;
758
759 sock_recv_cmsgs(msg, sk, skb);
760
761 /* Copy the address. */
762 if (sin) {
763 sin->sin_family = AF_INET;
764 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
765 sin->sin_port = 0;
766 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
767 *addr_len = sizeof(*sin);
768 }
769 if (inet_cmsg_flags(inet))
770 ip_cmsg_recv(msg, skb);
771 if (flags & MSG_TRUNC)
772 copied = skb->len;
773done:
774 skb_free_datagram(sk, skb);
775out:
776 if (err)
777 return err;
778 return copied;
779}
780
781static int raw_sk_init(struct sock *sk)
782{
783 struct raw_sock *rp = raw_sk(sk);
784
785 if (inet_sk(sk)->inet_num == IPPROTO_ICMP)
786 memset(&rp->filter, 0, sizeof(rp->filter));
787 return 0;
788}
789
790static int raw_seticmpfilter(struct sock *sk, sockptr_t optval, int optlen)
791{
792 if (optlen > sizeof(struct icmp_filter))
793 optlen = sizeof(struct icmp_filter);
794 if (copy_from_sockptr(&raw_sk(sk)->filter, optval, optlen))
795 return -EFAULT;
796 return 0;
797}
798
799static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
800{
801 int len, ret = -EFAULT;
802
803 if (get_user(len, optlen))
804 goto out;
805 ret = -EINVAL;
806 if (len < 0)
807 goto out;
808 if (len > sizeof(struct icmp_filter))
809 len = sizeof(struct icmp_filter);
810 ret = -EFAULT;
811 if (put_user(len, optlen) ||
812 copy_to_user(optval, &raw_sk(sk)->filter, len))
813 goto out;
814 ret = 0;
815out: return ret;
816}
817
818static int do_raw_setsockopt(struct sock *sk, int level, int optname,
819 sockptr_t optval, unsigned int optlen)
820{
821 if (optname == ICMP_FILTER) {
822 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
823 return -EOPNOTSUPP;
824 else
825 return raw_seticmpfilter(sk, optval, optlen);
826 }
827 return -ENOPROTOOPT;
828}
829
830static int raw_setsockopt(struct sock *sk, int level, int optname,
831 sockptr_t optval, unsigned int optlen)
832{
833 if (level != SOL_RAW)
834 return ip_setsockopt(sk, level, optname, optval, optlen);
835 return do_raw_setsockopt(sk, level, optname, optval, optlen);
836}
837
838static int do_raw_getsockopt(struct sock *sk, int level, int optname,
839 char __user *optval, int __user *optlen)
840{
841 if (optname == ICMP_FILTER) {
842 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
843 return -EOPNOTSUPP;
844 else
845 return raw_geticmpfilter(sk, optval, optlen);
846 }
847 return -ENOPROTOOPT;
848}
849
850static int raw_getsockopt(struct sock *sk, int level, int optname,
851 char __user *optval, int __user *optlen)
852{
853 if (level != SOL_RAW)
854 return ip_getsockopt(sk, level, optname, optval, optlen);
855 return do_raw_getsockopt(sk, level, optname, optval, optlen);
856}
857
858static int raw_ioctl(struct sock *sk, int cmd, int *karg)
859{
860 switch (cmd) {
861 case SIOCOUTQ: {
862 *karg = sk_wmem_alloc_get(sk);
863 return 0;
864 }
865 case SIOCINQ: {
866 struct sk_buff *skb;
867
868 spin_lock_bh(&sk->sk_receive_queue.lock);
869 skb = skb_peek(&sk->sk_receive_queue);
870 if (skb)
871 *karg = skb->len;
872 else
873 *karg = 0;
874 spin_unlock_bh(&sk->sk_receive_queue.lock);
875 return 0;
876 }
877
878 default:
879#ifdef CONFIG_IP_MROUTE
880 return ipmr_ioctl(sk, cmd, karg);
881#else
882 return -ENOIOCTLCMD;
883#endif
884 }
885}
886
887#ifdef CONFIG_COMPAT
888static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
889{
890 switch (cmd) {
891 case SIOCOUTQ:
892 case SIOCINQ:
893 return -ENOIOCTLCMD;
894 default:
895#ifdef CONFIG_IP_MROUTE
896 return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
897#else
898 return -ENOIOCTLCMD;
899#endif
900 }
901}
902#endif
903
904int raw_abort(struct sock *sk, int err)
905{
906 lock_sock(sk);
907
908 sk->sk_err = err;
909 sk_error_report(sk);
910 __udp_disconnect(sk, 0);
911
912 release_sock(sk);
913
914 return 0;
915}
916EXPORT_SYMBOL_GPL(raw_abort);
917
918struct proto raw_prot = {
919 .name = "RAW",
920 .owner = THIS_MODULE,
921 .close = raw_close,
922 .destroy = raw_destroy,
923 .connect = ip4_datagram_connect,
924 .disconnect = __udp_disconnect,
925 .ioctl = raw_ioctl,
926 .init = raw_sk_init,
927 .setsockopt = raw_setsockopt,
928 .getsockopt = raw_getsockopt,
929 .sendmsg = raw_sendmsg,
930 .recvmsg = raw_recvmsg,
931 .bind = raw_bind,
932 .backlog_rcv = raw_rcv_skb,
933 .release_cb = ip4_datagram_release_cb,
934 .hash = raw_hash_sk,
935 .unhash = raw_unhash_sk,
936 .obj_size = sizeof(struct raw_sock),
937 .useroffset = offsetof(struct raw_sock, filter),
938 .usersize = sizeof_field(struct raw_sock, filter),
939 .h.raw_hash = &raw_v4_hashinfo,
940#ifdef CONFIG_COMPAT
941 .compat_ioctl = compat_raw_ioctl,
942#endif
943 .diag_destroy = raw_abort,
944};
945
946#ifdef CONFIG_PROC_FS
947static struct sock *raw_get_first(struct seq_file *seq, int bucket)
948{
949 struct raw_hashinfo *h = pde_data(file_inode(seq->file));
950 struct raw_iter_state *state = raw_seq_private(seq);
951 struct hlist_head *hlist;
952 struct sock *sk;
953
954 for (state->bucket = bucket; state->bucket < RAW_HTABLE_SIZE;
955 ++state->bucket) {
956 hlist = &h->ht[state->bucket];
957 sk_for_each(sk, hlist) {
958 if (sock_net(sk) == seq_file_net(seq))
959 return sk;
960 }
961 }
962 return NULL;
963}
964
965static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
966{
967 struct raw_iter_state *state = raw_seq_private(seq);
968
969 do {
970 sk = sk_next(sk);
971 } while (sk && sock_net(sk) != seq_file_net(seq));
972
973 if (!sk)
974 return raw_get_first(seq, state->bucket + 1);
975 return sk;
976}
977
978static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
979{
980 struct sock *sk = raw_get_first(seq, 0);
981
982 if (sk)
983 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
984 --pos;
985 return pos ? NULL : sk;
986}
987
988void *raw_seq_start(struct seq_file *seq, loff_t *pos)
989 __acquires(&h->lock)
990{
991 struct raw_hashinfo *h = pde_data(file_inode(seq->file));
992
993 spin_lock(&h->lock);
994
995 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
996}
997EXPORT_SYMBOL_GPL(raw_seq_start);
998
999void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1000{
1001 struct sock *sk;
1002
1003 if (v == SEQ_START_TOKEN)
1004 sk = raw_get_first(seq, 0);
1005 else
1006 sk = raw_get_next(seq, v);
1007 ++*pos;
1008 return sk;
1009}
1010EXPORT_SYMBOL_GPL(raw_seq_next);
1011
1012void raw_seq_stop(struct seq_file *seq, void *v)
1013 __releases(&h->lock)
1014{
1015 struct raw_hashinfo *h = pde_data(file_inode(seq->file));
1016
1017 spin_unlock(&h->lock);
1018}
1019EXPORT_SYMBOL_GPL(raw_seq_stop);
1020
1021static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1022{
1023 struct inet_sock *inet = inet_sk(sp);
1024 __be32 dest = inet->inet_daddr,
1025 src = inet->inet_rcv_saddr;
1026 __u16 destp = 0,
1027 srcp = inet->inet_num;
1028
1029 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
1030 " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n",
1031 i, src, srcp, dest, destp, sp->sk_state,
1032 sk_wmem_alloc_get(sp),
1033 sk_rmem_alloc_get(sp),
1034 0, 0L, 0,
1035 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
1036 0, sock_i_ino(sp),
1037 refcount_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1038}
1039
1040static int raw_seq_show(struct seq_file *seq, void *v)
1041{
1042 if (v == SEQ_START_TOKEN)
1043 seq_printf(seq, " sl local_address rem_address st tx_queue "
1044 "rx_queue tr tm->when retrnsmt uid timeout "
1045 "inode ref pointer drops\n");
1046 else
1047 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1048 return 0;
1049}
1050
1051static const struct seq_operations raw_seq_ops = {
1052 .start = raw_seq_start,
1053 .next = raw_seq_next,
1054 .stop = raw_seq_stop,
1055 .show = raw_seq_show,
1056};
1057
1058static __net_init int raw_init_net(struct net *net)
1059{
1060 if (!proc_create_net_data("raw", 0444, net->proc_net, &raw_seq_ops,
1061 sizeof(struct raw_iter_state), &raw_v4_hashinfo))
1062 return -ENOMEM;
1063
1064 return 0;
1065}
1066
1067static __net_exit void raw_exit_net(struct net *net)
1068{
1069 remove_proc_entry("raw", net->proc_net);
1070}
1071
1072static __net_initdata struct pernet_operations raw_net_ops = {
1073 .init = raw_init_net,
1074 .exit = raw_exit_net,
1075};
1076
1077int __init raw_proc_init(void)
1078{
1079
1080 return register_pernet_subsys(&raw_net_ops);
1081}
1082
1083void __init raw_proc_exit(void)
1084{
1085 unregister_pernet_subsys(&raw_net_ops);
1086}
1087#endif /* CONFIG_PROC_FS */
1088
1089static void raw_sysctl_init_net(struct net *net)
1090{
1091#ifdef CONFIG_NET_L3_MASTER_DEV
1092 net->ipv4.sysctl_raw_l3mdev_accept = 1;
1093#endif
1094}
1095
1096static int __net_init raw_sysctl_init(struct net *net)
1097{
1098 raw_sysctl_init_net(net);
1099 return 0;
1100}
1101
1102static struct pernet_operations __net_initdata raw_sysctl_ops = {
1103 .init = raw_sysctl_init,
1104};
1105
1106void __init raw_init(void)
1107{
1108 raw_sysctl_init_net(&init_net);
1109 if (register_pernet_subsys(&raw_sysctl_ops))
1110 panic("RAW: failed to init sysctl parameters.\n");
1111}
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * RAW - implementation of IP "raw" sockets.
7 *
8 * Authors: Ross Biro
9 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
10 *
11 * Fixes:
12 * Alan Cox : verify_area() fixed up
13 * Alan Cox : ICMP error handling
14 * Alan Cox : EMSGSIZE if you send too big a packet
15 * Alan Cox : Now uses generic datagrams and shared
16 * skbuff library. No more peek crashes,
17 * no more backlogs
18 * Alan Cox : Checks sk->broadcast.
19 * Alan Cox : Uses skb_free_datagram/skb_copy_datagram
20 * Alan Cox : Raw passes ip options too
21 * Alan Cox : Setsocketopt added
22 * Alan Cox : Fixed error return for broadcasts
23 * Alan Cox : Removed wake_up calls
24 * Alan Cox : Use ttl/tos
25 * Alan Cox : Cleaned up old debugging
26 * Alan Cox : Use new kernel side addresses
27 * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets.
28 * Alan Cox : BSD style RAW socket demultiplexing.
29 * Alan Cox : Beginnings of mrouted support.
30 * Alan Cox : Added IP_HDRINCL option.
31 * Alan Cox : Skip broadcast check if BSDism set.
32 * David S. Miller : New socket lookup architecture.
33 *
34 * This program is free software; you can redistribute it and/or
35 * modify it under the terms of the GNU General Public License
36 * as published by the Free Software Foundation; either version
37 * 2 of the License, or (at your option) any later version.
38 */
39
40#include <linux/types.h>
41#include <linux/atomic.h>
42#include <asm/byteorder.h>
43#include <asm/current.h>
44#include <asm/uaccess.h>
45#include <asm/ioctls.h>
46#include <linux/stddef.h>
47#include <linux/slab.h>
48#include <linux/errno.h>
49#include <linux/aio.h>
50#include <linux/kernel.h>
51#include <linux/export.h>
52#include <linux/spinlock.h>
53#include <linux/sockios.h>
54#include <linux/socket.h>
55#include <linux/in.h>
56#include <linux/mroute.h>
57#include <linux/netdevice.h>
58#include <linux/in_route.h>
59#include <linux/route.h>
60#include <linux/skbuff.h>
61#include <net/net_namespace.h>
62#include <net/dst.h>
63#include <net/sock.h>
64#include <linux/ip.h>
65#include <linux/net.h>
66#include <net/ip.h>
67#include <net/icmp.h>
68#include <net/udp.h>
69#include <net/raw.h>
70#include <net/snmp.h>
71#include <net/tcp_states.h>
72#include <net/inet_common.h>
73#include <net/checksum.h>
74#include <net/xfrm.h>
75#include <linux/rtnetlink.h>
76#include <linux/proc_fs.h>
77#include <linux/seq_file.h>
78#include <linux/netfilter.h>
79#include <linux/netfilter_ipv4.h>
80#include <linux/compat.h>
81
82static struct raw_hashinfo raw_v4_hashinfo = {
83 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
84};
85
86void raw_hash_sk(struct sock *sk)
87{
88 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
89 struct hlist_head *head;
90
91 head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)];
92
93 write_lock_bh(&h->lock);
94 sk_add_node(sk, head);
95 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
96 write_unlock_bh(&h->lock);
97}
98EXPORT_SYMBOL_GPL(raw_hash_sk);
99
100void raw_unhash_sk(struct sock *sk)
101{
102 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
103
104 write_lock_bh(&h->lock);
105 if (sk_del_node_init(sk))
106 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
107 write_unlock_bh(&h->lock);
108}
109EXPORT_SYMBOL_GPL(raw_unhash_sk);
110
111static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk,
112 unsigned short num, __be32 raddr, __be32 laddr, int dif)
113{
114 sk_for_each_from(sk) {
115 struct inet_sock *inet = inet_sk(sk);
116
117 if (net_eq(sock_net(sk), net) && inet->inet_num == num &&
118 !(inet->inet_daddr && inet->inet_daddr != raddr) &&
119 !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) &&
120 !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
121 goto found; /* gotcha */
122 }
123 sk = NULL;
124found:
125 return sk;
126}
127
128/*
129 * 0 - deliver
130 * 1 - block
131 */
132static int icmp_filter(const struct sock *sk, const struct sk_buff *skb)
133{
134 struct icmphdr _hdr;
135 const struct icmphdr *hdr;
136
137 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
138 sizeof(_hdr), &_hdr);
139 if (!hdr)
140 return 1;
141
142 if (hdr->type < 32) {
143 __u32 data = raw_sk(sk)->filter.data;
144
145 return ((1U << hdr->type) & data) != 0;
146 }
147
148 /* Do not block unknown ICMP types */
149 return 0;
150}
151
152/* IP input processing comes here for RAW socket delivery.
153 * Caller owns SKB, so we must make clones.
154 *
155 * RFC 1122: SHOULD pass TOS value up to the transport layer.
156 * -> It does. And not only TOS, but all IP header.
157 */
158static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
159{
160 struct sock *sk;
161 struct hlist_head *head;
162 int delivered = 0;
163 struct net *net;
164
165 read_lock(&raw_v4_hashinfo.lock);
166 head = &raw_v4_hashinfo.ht[hash];
167 if (hlist_empty(head))
168 goto out;
169
170 net = dev_net(skb->dev);
171 sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol,
172 iph->saddr, iph->daddr,
173 skb->dev->ifindex);
174
175 while (sk) {
176 delivered = 1;
177 if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) {
178 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
179
180 /* Not releasing hash table! */
181 if (clone)
182 raw_rcv(sk, clone);
183 }
184 sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol,
185 iph->saddr, iph->daddr,
186 skb->dev->ifindex);
187 }
188out:
189 read_unlock(&raw_v4_hashinfo.lock);
190 return delivered;
191}
192
193int raw_local_deliver(struct sk_buff *skb, int protocol)
194{
195 int hash;
196 struct sock *raw_sk;
197
198 hash = protocol & (RAW_HTABLE_SIZE - 1);
199 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
200
201 /* If there maybe a raw socket we must check - if not we
202 * don't care less
203 */
204 if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash))
205 raw_sk = NULL;
206
207 return raw_sk != NULL;
208
209}
210
211static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
212{
213 struct inet_sock *inet = inet_sk(sk);
214 const int type = icmp_hdr(skb)->type;
215 const int code = icmp_hdr(skb)->code;
216 int err = 0;
217 int harderr = 0;
218
219 if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED)
220 ipv4_sk_update_pmtu(skb, sk, info);
221 else if (type == ICMP_REDIRECT) {
222 ipv4_sk_redirect(skb, sk);
223 return;
224 }
225
226 /* Report error on raw socket, if:
227 1. User requested ip_recverr.
228 2. Socket is connected (otherwise the error indication
229 is useless without ip_recverr and error is hard.
230 */
231 if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED)
232 return;
233
234 switch (type) {
235 default:
236 case ICMP_TIME_EXCEEDED:
237 err = EHOSTUNREACH;
238 break;
239 case ICMP_SOURCE_QUENCH:
240 return;
241 case ICMP_PARAMETERPROB:
242 err = EPROTO;
243 harderr = 1;
244 break;
245 case ICMP_DEST_UNREACH:
246 err = EHOSTUNREACH;
247 if (code > NR_ICMP_UNREACH)
248 break;
249 err = icmp_err_convert[code].errno;
250 harderr = icmp_err_convert[code].fatal;
251 if (code == ICMP_FRAG_NEEDED) {
252 harderr = inet->pmtudisc != IP_PMTUDISC_DONT;
253 err = EMSGSIZE;
254 }
255 }
256
257 if (inet->recverr) {
258 const struct iphdr *iph = (const struct iphdr *)skb->data;
259 u8 *payload = skb->data + (iph->ihl << 2);
260
261 if (inet->hdrincl)
262 payload = skb->data;
263 ip_icmp_error(sk, skb, err, 0, info, payload);
264 }
265
266 if (inet->recverr || harderr) {
267 sk->sk_err = err;
268 sk->sk_error_report(sk);
269 }
270}
271
272void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
273{
274 int hash;
275 struct sock *raw_sk;
276 const struct iphdr *iph;
277 struct net *net;
278
279 hash = protocol & (RAW_HTABLE_SIZE - 1);
280
281 read_lock(&raw_v4_hashinfo.lock);
282 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
283 if (raw_sk != NULL) {
284 iph = (const struct iphdr *)skb->data;
285 net = dev_net(skb->dev);
286
287 while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
288 iph->daddr, iph->saddr,
289 skb->dev->ifindex)) != NULL) {
290 raw_err(raw_sk, skb, info);
291 raw_sk = sk_next(raw_sk);
292 iph = (const struct iphdr *)skb->data;
293 }
294 }
295 read_unlock(&raw_v4_hashinfo.lock);
296}
297
298static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
299{
300 /* Charge it to the socket. */
301
302 ipv4_pktinfo_prepare(sk, skb);
303 if (sock_queue_rcv_skb(sk, skb) < 0) {
304 kfree_skb(skb);
305 return NET_RX_DROP;
306 }
307
308 return NET_RX_SUCCESS;
309}
310
311int raw_rcv(struct sock *sk, struct sk_buff *skb)
312{
313 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
314 atomic_inc(&sk->sk_drops);
315 kfree_skb(skb);
316 return NET_RX_DROP;
317 }
318 nf_reset(skb);
319
320 skb_push(skb, skb->data - skb_network_header(skb));
321
322 raw_rcv_skb(sk, skb);
323 return 0;
324}
325
326static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
327 void *from, size_t length,
328 struct rtable **rtp,
329 unsigned int flags)
330{
331 struct inet_sock *inet = inet_sk(sk);
332 struct net *net = sock_net(sk);
333 struct iphdr *iph;
334 struct sk_buff *skb;
335 unsigned int iphlen;
336 int err;
337 struct rtable *rt = *rtp;
338 int hlen, tlen;
339
340 if (length > rt->dst.dev->mtu) {
341 ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
342 rt->dst.dev->mtu);
343 return -EMSGSIZE;
344 }
345 if (flags&MSG_PROBE)
346 goto out;
347
348 hlen = LL_RESERVED_SPACE(rt->dst.dev);
349 tlen = rt->dst.dev->needed_tailroom;
350 skb = sock_alloc_send_skb(sk,
351 length + hlen + tlen + 15,
352 flags & MSG_DONTWAIT, &err);
353 if (skb == NULL)
354 goto error;
355 skb_reserve(skb, hlen);
356
357 skb->priority = sk->sk_priority;
358 skb->mark = sk->sk_mark;
359 skb_dst_set(skb, &rt->dst);
360 *rtp = NULL;
361
362 skb_reset_network_header(skb);
363 iph = ip_hdr(skb);
364 skb_put(skb, length);
365
366 skb->ip_summed = CHECKSUM_NONE;
367
368 skb->transport_header = skb->network_header;
369 err = -EFAULT;
370 if (memcpy_fromiovecend((void *)iph, from, 0, length))
371 goto error_free;
372
373 iphlen = iph->ihl * 4;
374
375 /*
376 * We don't want to modify the ip header, but we do need to
377 * be sure that it won't cause problems later along the network
378 * stack. Specifically we want to make sure that iph->ihl is a
379 * sane value. If ihl points beyond the length of the buffer passed
380 * in, reject the frame as invalid
381 */
382 err = -EINVAL;
383 if (iphlen > length)
384 goto error_free;
385
386 if (iphlen >= sizeof(*iph)) {
387 if (!iph->saddr)
388 iph->saddr = fl4->saddr;
389 iph->check = 0;
390 iph->tot_len = htons(length);
391 if (!iph->id)
392 ip_select_ident(skb, &rt->dst, NULL);
393
394 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
395 }
396 if (iph->protocol == IPPROTO_ICMP)
397 icmp_out_count(net, ((struct icmphdr *)
398 skb_transport_header(skb))->type);
399
400 err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL,
401 rt->dst.dev, dst_output);
402 if (err > 0)
403 err = net_xmit_errno(err);
404 if (err)
405 goto error;
406out:
407 return 0;
408
409error_free:
410 kfree_skb(skb);
411error:
412 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
413 if (err == -ENOBUFS && !inet->recverr)
414 err = 0;
415 return err;
416}
417
418static int raw_probe_proto_opt(struct flowi4 *fl4, struct msghdr *msg)
419{
420 struct iovec *iov;
421 u8 __user *type = NULL;
422 u8 __user *code = NULL;
423 int probed = 0;
424 unsigned int i;
425
426 if (!msg->msg_iov)
427 return 0;
428
429 for (i = 0; i < msg->msg_iovlen; i++) {
430 iov = &msg->msg_iov[i];
431 if (!iov)
432 continue;
433
434 switch (fl4->flowi4_proto) {
435 case IPPROTO_ICMP:
436 /* check if one-byte field is readable or not. */
437 if (iov->iov_base && iov->iov_len < 1)
438 break;
439
440 if (!type) {
441 type = iov->iov_base;
442 /* check if code field is readable or not. */
443 if (iov->iov_len > 1)
444 code = type + 1;
445 } else if (!code)
446 code = iov->iov_base;
447
448 if (type && code) {
449 if (get_user(fl4->fl4_icmp_type, type) ||
450 get_user(fl4->fl4_icmp_code, code))
451 return -EFAULT;
452 probed = 1;
453 }
454 break;
455 default:
456 probed = 1;
457 break;
458 }
459 if (probed)
460 break;
461 }
462 return 0;
463}
464
465static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
466 size_t len)
467{
468 struct inet_sock *inet = inet_sk(sk);
469 struct ipcm_cookie ipc;
470 struct rtable *rt = NULL;
471 struct flowi4 fl4;
472 int free = 0;
473 __be32 daddr;
474 __be32 saddr;
475 u8 tos;
476 int err;
477 struct ip_options_data opt_copy;
478
479 err = -EMSGSIZE;
480 if (len > 0xFFFF)
481 goto out;
482
483 /*
484 * Check the flags.
485 */
486
487 err = -EOPNOTSUPP;
488 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
489 goto out; /* compatibility */
490
491 /*
492 * Get and verify the address.
493 */
494
495 if (msg->msg_namelen) {
496 DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name);
497 err = -EINVAL;
498 if (msg->msg_namelen < sizeof(*usin))
499 goto out;
500 if (usin->sin_family != AF_INET) {
501 pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n",
502 __func__, current->comm);
503 err = -EAFNOSUPPORT;
504 if (usin->sin_family)
505 goto out;
506 }
507 daddr = usin->sin_addr.s_addr;
508 /* ANK: I did not forget to get protocol from port field.
509 * I just do not know, who uses this weirdness.
510 * IP_HDRINCL is much more convenient.
511 */
512 } else {
513 err = -EDESTADDRREQ;
514 if (sk->sk_state != TCP_ESTABLISHED)
515 goto out;
516 daddr = inet->inet_daddr;
517 }
518
519 ipc.addr = inet->inet_saddr;
520 ipc.opt = NULL;
521 ipc.tx_flags = 0;
522 ipc.ttl = 0;
523 ipc.tos = -1;
524 ipc.oif = sk->sk_bound_dev_if;
525
526 if (msg->msg_controllen) {
527 err = ip_cmsg_send(sock_net(sk), msg, &ipc, false);
528 if (err)
529 goto out;
530 if (ipc.opt)
531 free = 1;
532 }
533
534 saddr = ipc.addr;
535 ipc.addr = daddr;
536
537 if (!ipc.opt) {
538 struct ip_options_rcu *inet_opt;
539
540 rcu_read_lock();
541 inet_opt = rcu_dereference(inet->inet_opt);
542 if (inet_opt) {
543 memcpy(&opt_copy, inet_opt,
544 sizeof(*inet_opt) + inet_opt->opt.optlen);
545 ipc.opt = &opt_copy.opt;
546 }
547 rcu_read_unlock();
548 }
549
550 if (ipc.opt) {
551 err = -EINVAL;
552 /* Linux does not mangle headers on raw sockets,
553 * so that IP options + IP_HDRINCL is non-sense.
554 */
555 if (inet->hdrincl)
556 goto done;
557 if (ipc.opt->opt.srr) {
558 if (!daddr)
559 goto done;
560 daddr = ipc.opt->opt.faddr;
561 }
562 }
563 tos = get_rtconn_flags(&ipc, sk);
564 if (msg->msg_flags & MSG_DONTROUTE)
565 tos |= RTO_ONLINK;
566
567 if (ipv4_is_multicast(daddr)) {
568 if (!ipc.oif)
569 ipc.oif = inet->mc_index;
570 if (!saddr)
571 saddr = inet->mc_addr;
572 } else if (!ipc.oif)
573 ipc.oif = inet->uc_index;
574
575 flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
576 RT_SCOPE_UNIVERSE,
577 inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
578 inet_sk_flowi_flags(sk) |
579 (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
580 daddr, saddr, 0, 0);
581
582 if (!inet->hdrincl) {
583 err = raw_probe_proto_opt(&fl4, msg);
584 if (err)
585 goto done;
586 }
587
588 security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
589 rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
590 if (IS_ERR(rt)) {
591 err = PTR_ERR(rt);
592 rt = NULL;
593 goto done;
594 }
595
596 err = -EACCES;
597 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
598 goto done;
599
600 if (msg->msg_flags & MSG_CONFIRM)
601 goto do_confirm;
602back_from_confirm:
603
604 if (inet->hdrincl)
605 err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len,
606 &rt, msg->msg_flags);
607
608 else {
609 if (!ipc.addr)
610 ipc.addr = fl4.daddr;
611 lock_sock(sk);
612 err = ip_append_data(sk, &fl4, ip_generic_getfrag,
613 msg->msg_iov, len, 0,
614 &ipc, &rt, msg->msg_flags);
615 if (err)
616 ip_flush_pending_frames(sk);
617 else if (!(msg->msg_flags & MSG_MORE)) {
618 err = ip_push_pending_frames(sk, &fl4);
619 if (err == -ENOBUFS && !inet->recverr)
620 err = 0;
621 }
622 release_sock(sk);
623 }
624done:
625 if (free)
626 kfree(ipc.opt);
627 ip_rt_put(rt);
628
629out:
630 if (err < 0)
631 return err;
632 return len;
633
634do_confirm:
635 dst_confirm(&rt->dst);
636 if (!(msg->msg_flags & MSG_PROBE) || len)
637 goto back_from_confirm;
638 err = 0;
639 goto done;
640}
641
642static void raw_close(struct sock *sk, long timeout)
643{
644 /*
645 * Raw sockets may have direct kernel references. Kill them.
646 */
647 ip_ra_control(sk, 0, NULL);
648
649 sk_common_release(sk);
650}
651
652static void raw_destroy(struct sock *sk)
653{
654 lock_sock(sk);
655 ip_flush_pending_frames(sk);
656 release_sock(sk);
657}
658
659/* This gets rid of all the nasties in af_inet. -DaveM */
660static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
661{
662 struct inet_sock *inet = inet_sk(sk);
663 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
664 int ret = -EINVAL;
665 int chk_addr_ret;
666
667 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
668 goto out;
669 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
670 ret = -EADDRNOTAVAIL;
671 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
672 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
673 goto out;
674 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
675 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
676 inet->inet_saddr = 0; /* Use device */
677 sk_dst_reset(sk);
678 ret = 0;
679out: return ret;
680}
681
682/*
683 * This should be easy, if there is something there
684 * we return it, otherwise we block.
685 */
686
687static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
688 size_t len, int noblock, int flags, int *addr_len)
689{
690 struct inet_sock *inet = inet_sk(sk);
691 size_t copied = 0;
692 int err = -EOPNOTSUPP;
693 DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name);
694 struct sk_buff *skb;
695
696 if (flags & MSG_OOB)
697 goto out;
698
699 if (flags & MSG_ERRQUEUE) {
700 err = ip_recv_error(sk, msg, len, addr_len);
701 goto out;
702 }
703
704 skb = skb_recv_datagram(sk, flags, noblock, &err);
705 if (!skb)
706 goto out;
707
708 copied = skb->len;
709 if (len < copied) {
710 msg->msg_flags |= MSG_TRUNC;
711 copied = len;
712 }
713
714 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
715 if (err)
716 goto done;
717
718 sock_recv_ts_and_drops(msg, sk, skb);
719
720 /* Copy the address. */
721 if (sin) {
722 sin->sin_family = AF_INET;
723 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
724 sin->sin_port = 0;
725 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
726 *addr_len = sizeof(*sin);
727 }
728 if (inet->cmsg_flags)
729 ip_cmsg_recv(msg, skb);
730 if (flags & MSG_TRUNC)
731 copied = skb->len;
732done:
733 skb_free_datagram(sk, skb);
734out:
735 if (err)
736 return err;
737 return copied;
738}
739
740static int raw_init(struct sock *sk)
741{
742 struct raw_sock *rp = raw_sk(sk);
743
744 if (inet_sk(sk)->inet_num == IPPROTO_ICMP)
745 memset(&rp->filter, 0, sizeof(rp->filter));
746 return 0;
747}
748
749static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
750{
751 if (optlen > sizeof(struct icmp_filter))
752 optlen = sizeof(struct icmp_filter);
753 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
754 return -EFAULT;
755 return 0;
756}
757
758static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
759{
760 int len, ret = -EFAULT;
761
762 if (get_user(len, optlen))
763 goto out;
764 ret = -EINVAL;
765 if (len < 0)
766 goto out;
767 if (len > sizeof(struct icmp_filter))
768 len = sizeof(struct icmp_filter);
769 ret = -EFAULT;
770 if (put_user(len, optlen) ||
771 copy_to_user(optval, &raw_sk(sk)->filter, len))
772 goto out;
773 ret = 0;
774out: return ret;
775}
776
777static int do_raw_setsockopt(struct sock *sk, int level, int optname,
778 char __user *optval, unsigned int optlen)
779{
780 if (optname == ICMP_FILTER) {
781 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
782 return -EOPNOTSUPP;
783 else
784 return raw_seticmpfilter(sk, optval, optlen);
785 }
786 return -ENOPROTOOPT;
787}
788
789static int raw_setsockopt(struct sock *sk, int level, int optname,
790 char __user *optval, unsigned int optlen)
791{
792 if (level != SOL_RAW)
793 return ip_setsockopt(sk, level, optname, optval, optlen);
794 return do_raw_setsockopt(sk, level, optname, optval, optlen);
795}
796
797#ifdef CONFIG_COMPAT
798static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
799 char __user *optval, unsigned int optlen)
800{
801 if (level != SOL_RAW)
802 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
803 return do_raw_setsockopt(sk, level, optname, optval, optlen);
804}
805#endif
806
807static int do_raw_getsockopt(struct sock *sk, int level, int optname,
808 char __user *optval, int __user *optlen)
809{
810 if (optname == ICMP_FILTER) {
811 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
812 return -EOPNOTSUPP;
813 else
814 return raw_geticmpfilter(sk, optval, optlen);
815 }
816 return -ENOPROTOOPT;
817}
818
819static int raw_getsockopt(struct sock *sk, int level, int optname,
820 char __user *optval, int __user *optlen)
821{
822 if (level != SOL_RAW)
823 return ip_getsockopt(sk, level, optname, optval, optlen);
824 return do_raw_getsockopt(sk, level, optname, optval, optlen);
825}
826
827#ifdef CONFIG_COMPAT
828static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
829 char __user *optval, int __user *optlen)
830{
831 if (level != SOL_RAW)
832 return compat_ip_getsockopt(sk, level, optname, optval, optlen);
833 return do_raw_getsockopt(sk, level, optname, optval, optlen);
834}
835#endif
836
837static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
838{
839 switch (cmd) {
840 case SIOCOUTQ: {
841 int amount = sk_wmem_alloc_get(sk);
842
843 return put_user(amount, (int __user *)arg);
844 }
845 case SIOCINQ: {
846 struct sk_buff *skb;
847 int amount = 0;
848
849 spin_lock_bh(&sk->sk_receive_queue.lock);
850 skb = skb_peek(&sk->sk_receive_queue);
851 if (skb != NULL)
852 amount = skb->len;
853 spin_unlock_bh(&sk->sk_receive_queue.lock);
854 return put_user(amount, (int __user *)arg);
855 }
856
857 default:
858#ifdef CONFIG_IP_MROUTE
859 return ipmr_ioctl(sk, cmd, (void __user *)arg);
860#else
861 return -ENOIOCTLCMD;
862#endif
863 }
864}
865
866#ifdef CONFIG_COMPAT
867static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
868{
869 switch (cmd) {
870 case SIOCOUTQ:
871 case SIOCINQ:
872 return -ENOIOCTLCMD;
873 default:
874#ifdef CONFIG_IP_MROUTE
875 return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
876#else
877 return -ENOIOCTLCMD;
878#endif
879 }
880}
881#endif
882
883struct proto raw_prot = {
884 .name = "RAW",
885 .owner = THIS_MODULE,
886 .close = raw_close,
887 .destroy = raw_destroy,
888 .connect = ip4_datagram_connect,
889 .disconnect = udp_disconnect,
890 .ioctl = raw_ioctl,
891 .init = raw_init,
892 .setsockopt = raw_setsockopt,
893 .getsockopt = raw_getsockopt,
894 .sendmsg = raw_sendmsg,
895 .recvmsg = raw_recvmsg,
896 .bind = raw_bind,
897 .backlog_rcv = raw_rcv_skb,
898 .release_cb = ip4_datagram_release_cb,
899 .hash = raw_hash_sk,
900 .unhash = raw_unhash_sk,
901 .obj_size = sizeof(struct raw_sock),
902 .h.raw_hash = &raw_v4_hashinfo,
903#ifdef CONFIG_COMPAT
904 .compat_setsockopt = compat_raw_setsockopt,
905 .compat_getsockopt = compat_raw_getsockopt,
906 .compat_ioctl = compat_raw_ioctl,
907#endif
908};
909
910#ifdef CONFIG_PROC_FS
911static struct sock *raw_get_first(struct seq_file *seq)
912{
913 struct sock *sk;
914 struct raw_iter_state *state = raw_seq_private(seq);
915
916 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
917 ++state->bucket) {
918 sk_for_each(sk, &state->h->ht[state->bucket])
919 if (sock_net(sk) == seq_file_net(seq))
920 goto found;
921 }
922 sk = NULL;
923found:
924 return sk;
925}
926
927static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
928{
929 struct raw_iter_state *state = raw_seq_private(seq);
930
931 do {
932 sk = sk_next(sk);
933try_again:
934 ;
935 } while (sk && sock_net(sk) != seq_file_net(seq));
936
937 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
938 sk = sk_head(&state->h->ht[state->bucket]);
939 goto try_again;
940 }
941 return sk;
942}
943
944static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
945{
946 struct sock *sk = raw_get_first(seq);
947
948 if (sk)
949 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
950 --pos;
951 return pos ? NULL : sk;
952}
953
954void *raw_seq_start(struct seq_file *seq, loff_t *pos)
955{
956 struct raw_iter_state *state = raw_seq_private(seq);
957
958 read_lock(&state->h->lock);
959 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
960}
961EXPORT_SYMBOL_GPL(raw_seq_start);
962
963void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
964{
965 struct sock *sk;
966
967 if (v == SEQ_START_TOKEN)
968 sk = raw_get_first(seq);
969 else
970 sk = raw_get_next(seq, v);
971 ++*pos;
972 return sk;
973}
974EXPORT_SYMBOL_GPL(raw_seq_next);
975
976void raw_seq_stop(struct seq_file *seq, void *v)
977{
978 struct raw_iter_state *state = raw_seq_private(seq);
979
980 read_unlock(&state->h->lock);
981}
982EXPORT_SYMBOL_GPL(raw_seq_stop);
983
984static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
985{
986 struct inet_sock *inet = inet_sk(sp);
987 __be32 dest = inet->inet_daddr,
988 src = inet->inet_rcv_saddr;
989 __u16 destp = 0,
990 srcp = inet->inet_num;
991
992 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
993 " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n",
994 i, src, srcp, dest, destp, sp->sk_state,
995 sk_wmem_alloc_get(sp),
996 sk_rmem_alloc_get(sp),
997 0, 0L, 0,
998 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
999 0, sock_i_ino(sp),
1000 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1001}
1002
1003static int raw_seq_show(struct seq_file *seq, void *v)
1004{
1005 if (v == SEQ_START_TOKEN)
1006 seq_printf(seq, " sl local_address rem_address st tx_queue "
1007 "rx_queue tr tm->when retrnsmt uid timeout "
1008 "inode ref pointer drops\n");
1009 else
1010 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1011 return 0;
1012}
1013
1014static const struct seq_operations raw_seq_ops = {
1015 .start = raw_seq_start,
1016 .next = raw_seq_next,
1017 .stop = raw_seq_stop,
1018 .show = raw_seq_show,
1019};
1020
1021int raw_seq_open(struct inode *ino, struct file *file,
1022 struct raw_hashinfo *h, const struct seq_operations *ops)
1023{
1024 int err;
1025 struct raw_iter_state *i;
1026
1027 err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state));
1028 if (err < 0)
1029 return err;
1030
1031 i = raw_seq_private((struct seq_file *)file->private_data);
1032 i->h = h;
1033 return 0;
1034}
1035EXPORT_SYMBOL_GPL(raw_seq_open);
1036
1037static int raw_v4_seq_open(struct inode *inode, struct file *file)
1038{
1039 return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops);
1040}
1041
1042static const struct file_operations raw_seq_fops = {
1043 .owner = THIS_MODULE,
1044 .open = raw_v4_seq_open,
1045 .read = seq_read,
1046 .llseek = seq_lseek,
1047 .release = seq_release_net,
1048};
1049
1050static __net_init int raw_init_net(struct net *net)
1051{
1052 if (!proc_create("raw", S_IRUGO, net->proc_net, &raw_seq_fops))
1053 return -ENOMEM;
1054
1055 return 0;
1056}
1057
1058static __net_exit void raw_exit_net(struct net *net)
1059{
1060 remove_proc_entry("raw", net->proc_net);
1061}
1062
1063static __net_initdata struct pernet_operations raw_net_ops = {
1064 .init = raw_init_net,
1065 .exit = raw_exit_net,
1066};
1067
1068int __init raw_proc_init(void)
1069{
1070 return register_pernet_subsys(&raw_net_ops);
1071}
1072
1073void __init raw_proc_exit(void)
1074{
1075 unregister_pernet_subsys(&raw_net_ops);
1076}
1077#endif /* CONFIG_PROC_FS */