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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 = {
89 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
90};
91EXPORT_SYMBOL_GPL(raw_v4_hashinfo);
92
93int raw_hash_sk(struct sock *sk)
94{
95 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
96 struct hlist_head *head;
97
98 head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)];
99
100 write_lock_bh(&h->lock);
101 sk_add_node(sk, head);
102 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
103 write_unlock_bh(&h->lock);
104
105 return 0;
106}
107EXPORT_SYMBOL_GPL(raw_hash_sk);
108
109void raw_unhash_sk(struct sock *sk)
110{
111 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
112
113 write_lock_bh(&h->lock);
114 if (sk_del_node_init(sk))
115 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
116 write_unlock_bh(&h->lock);
117}
118EXPORT_SYMBOL_GPL(raw_unhash_sk);
119
120struct sock *__raw_v4_lookup(struct net *net, struct sock *sk,
121 unsigned short num, __be32 raddr, __be32 laddr,
122 int dif, int sdif)
123{
124 sk_for_each_from(sk) {
125 struct inet_sock *inet = inet_sk(sk);
126
127 if (net_eq(sock_net(sk), net) && inet->inet_num == num &&
128 !(inet->inet_daddr && inet->inet_daddr != raddr) &&
129 !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) &&
130 raw_sk_bound_dev_eq(net, sk->sk_bound_dev_if, dif, sdif))
131 goto found; /* gotcha */
132 }
133 sk = NULL;
134found:
135 return sk;
136}
137EXPORT_SYMBOL_GPL(__raw_v4_lookup);
138
139/*
140 * 0 - deliver
141 * 1 - block
142 */
143static int icmp_filter(const struct sock *sk, const struct sk_buff *skb)
144{
145 struct icmphdr _hdr;
146 const struct icmphdr *hdr;
147
148 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
149 sizeof(_hdr), &_hdr);
150 if (!hdr)
151 return 1;
152
153 if (hdr->type < 32) {
154 __u32 data = raw_sk(sk)->filter.data;
155
156 return ((1U << hdr->type) & data) != 0;
157 }
158
159 /* Do not block unknown ICMP types */
160 return 0;
161}
162
163/* IP input processing comes here for RAW socket delivery.
164 * Caller owns SKB, so we must make clones.
165 *
166 * RFC 1122: SHOULD pass TOS value up to the transport layer.
167 * -> It does. And not only TOS, but all IP header.
168 */
169static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
170{
171 int sdif = inet_sdif(skb);
172 int dif = inet_iif(skb);
173 struct sock *sk;
174 struct hlist_head *head;
175 int delivered = 0;
176 struct net *net;
177
178 read_lock(&raw_v4_hashinfo.lock);
179 head = &raw_v4_hashinfo.ht[hash];
180 if (hlist_empty(head))
181 goto out;
182
183 net = dev_net(skb->dev);
184 sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol,
185 iph->saddr, iph->daddr, dif, sdif);
186
187 while (sk) {
188 delivered = 1;
189 if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) &&
190 ip_mc_sf_allow(sk, iph->daddr, iph->saddr,
191 skb->dev->ifindex, sdif)) {
192 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
193
194 /* Not releasing hash table! */
195 if (clone)
196 raw_rcv(sk, clone);
197 }
198 sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol,
199 iph->saddr, iph->daddr,
200 dif, sdif);
201 }
202out:
203 read_unlock(&raw_v4_hashinfo.lock);
204 return delivered;
205}
206
207int raw_local_deliver(struct sk_buff *skb, int protocol)
208{
209 int hash;
210 struct sock *raw_sk;
211
212 hash = protocol & (RAW_HTABLE_SIZE - 1);
213 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
214
215 /* If there maybe a raw socket we must check - if not we
216 * don't care less
217 */
218 if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash))
219 raw_sk = NULL;
220
221 return raw_sk != NULL;
222
223}
224
225static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
226{
227 struct inet_sock *inet = inet_sk(sk);
228 const int type = icmp_hdr(skb)->type;
229 const int code = icmp_hdr(skb)->code;
230 int err = 0;
231 int harderr = 0;
232
233 if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED)
234 ipv4_sk_update_pmtu(skb, sk, info);
235 else if (type == ICMP_REDIRECT) {
236 ipv4_sk_redirect(skb, sk);
237 return;
238 }
239
240 /* Report error on raw socket, if:
241 1. User requested ip_recverr.
242 2. Socket is connected (otherwise the error indication
243 is useless without ip_recverr and error is hard.
244 */
245 if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED)
246 return;
247
248 switch (type) {
249 default:
250 case ICMP_TIME_EXCEEDED:
251 err = EHOSTUNREACH;
252 break;
253 case ICMP_SOURCE_QUENCH:
254 return;
255 case ICMP_PARAMETERPROB:
256 err = EPROTO;
257 harderr = 1;
258 break;
259 case ICMP_DEST_UNREACH:
260 err = EHOSTUNREACH;
261 if (code > NR_ICMP_UNREACH)
262 break;
263 err = icmp_err_convert[code].errno;
264 harderr = icmp_err_convert[code].fatal;
265 if (code == ICMP_FRAG_NEEDED) {
266 harderr = inet->pmtudisc != IP_PMTUDISC_DONT;
267 err = EMSGSIZE;
268 }
269 }
270
271 if (inet->recverr) {
272 const struct iphdr *iph = (const struct iphdr *)skb->data;
273 u8 *payload = skb->data + (iph->ihl << 2);
274
275 if (inet->hdrincl)
276 payload = skb->data;
277 ip_icmp_error(sk, skb, err, 0, info, payload);
278 }
279
280 if (inet->recverr || harderr) {
281 sk->sk_err = err;
282 sk->sk_error_report(sk);
283 }
284}
285
286void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
287{
288 int hash;
289 struct sock *raw_sk;
290 const struct iphdr *iph;
291 struct net *net;
292
293 hash = protocol & (RAW_HTABLE_SIZE - 1);
294
295 read_lock(&raw_v4_hashinfo.lock);
296 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
297 if (raw_sk) {
298 int dif = skb->dev->ifindex;
299 int sdif = inet_sdif(skb);
300
301 iph = (const struct iphdr *)skb->data;
302 net = dev_net(skb->dev);
303
304 while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
305 iph->daddr, iph->saddr,
306 dif, sdif)) != NULL) {
307 raw_err(raw_sk, skb, info);
308 raw_sk = sk_next(raw_sk);
309 iph = (const struct iphdr *)skb->data;
310 }
311 }
312 read_unlock(&raw_v4_hashinfo.lock);
313}
314
315static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
316{
317 /* Charge it to the socket. */
318
319 ipv4_pktinfo_prepare(sk, skb);
320 if (sock_queue_rcv_skb(sk, skb) < 0) {
321 kfree_skb(skb);
322 return NET_RX_DROP;
323 }
324
325 return NET_RX_SUCCESS;
326}
327
328int raw_rcv(struct sock *sk, struct sk_buff *skb)
329{
330 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
331 atomic_inc(&sk->sk_drops);
332 kfree_skb(skb);
333 return NET_RX_DROP;
334 }
335 nf_reset_ct(skb);
336
337 skb_push(skb, skb->data - skb_network_header(skb));
338
339 raw_rcv_skb(sk, skb);
340 return 0;
341}
342
343static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
344 struct msghdr *msg, size_t length,
345 struct rtable **rtp, unsigned int flags,
346 const struct sockcm_cookie *sockc)
347{
348 struct inet_sock *inet = inet_sk(sk);
349 struct net *net = sock_net(sk);
350 struct iphdr *iph;
351 struct sk_buff *skb;
352 unsigned int iphlen;
353 int err;
354 struct rtable *rt = *rtp;
355 int hlen, tlen;
356
357 if (length > rt->dst.dev->mtu) {
358 ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
359 rt->dst.dev->mtu);
360 return -EMSGSIZE;
361 }
362 if (length < sizeof(struct iphdr))
363 return -EINVAL;
364
365 if (flags&MSG_PROBE)
366 goto out;
367
368 hlen = LL_RESERVED_SPACE(rt->dst.dev);
369 tlen = rt->dst.dev->needed_tailroom;
370 skb = sock_alloc_send_skb(sk,
371 length + hlen + tlen + 15,
372 flags & MSG_DONTWAIT, &err);
373 if (!skb)
374 goto error;
375 skb_reserve(skb, hlen);
376
377 skb->priority = sk->sk_priority;
378 skb->mark = sockc->mark;
379 skb->tstamp = sockc->transmit_time;
380 skb_dst_set(skb, &rt->dst);
381 *rtp = NULL;
382
383 skb_reset_network_header(skb);
384 iph = ip_hdr(skb);
385 skb_put(skb, length);
386
387 skb->ip_summed = CHECKSUM_NONE;
388
389 skb_setup_tx_timestamp(skb, sockc->tsflags);
390
391 if (flags & MSG_CONFIRM)
392 skb_set_dst_pending_confirm(skb, 1);
393
394 skb->transport_header = skb->network_header;
395 err = -EFAULT;
396 if (memcpy_from_msg(iph, msg, length))
397 goto error_free;
398
399 iphlen = iph->ihl * 4;
400
401 /*
402 * We don't want to modify the ip header, but we do need to
403 * be sure that it won't cause problems later along the network
404 * stack. Specifically we want to make sure that iph->ihl is a
405 * sane value. If ihl points beyond the length of the buffer passed
406 * in, reject the frame as invalid
407 */
408 err = -EINVAL;
409 if (iphlen > length)
410 goto error_free;
411
412 if (iphlen >= sizeof(*iph)) {
413 if (!iph->saddr)
414 iph->saddr = fl4->saddr;
415 iph->check = 0;
416 iph->tot_len = htons(length);
417 if (!iph->id)
418 ip_select_ident(net, skb, NULL);
419
420 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
421 skb->transport_header += iphlen;
422 if (iph->protocol == IPPROTO_ICMP &&
423 length >= iphlen + sizeof(struct icmphdr))
424 icmp_out_count(net, ((struct icmphdr *)
425 skb_transport_header(skb))->type);
426 }
427
428 err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT,
429 net, sk, skb, NULL, rt->dst.dev,
430 dst_output);
431 if (err > 0)
432 err = net_xmit_errno(err);
433 if (err)
434 goto error;
435out:
436 return 0;
437
438error_free:
439 kfree_skb(skb);
440error:
441 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
442 if (err == -ENOBUFS && !inet->recverr)
443 err = 0;
444 return err;
445}
446
447static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4)
448{
449 int err;
450
451 if (fl4->flowi4_proto != IPPROTO_ICMP)
452 return 0;
453
454 /* We only need the first two bytes. */
455 rfv->hlen = 2;
456
457 err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen);
458 if (err)
459 return err;
460
461 fl4->fl4_icmp_type = rfv->hdr.icmph.type;
462 fl4->fl4_icmp_code = rfv->hdr.icmph.code;
463
464 return 0;
465}
466
467static int raw_getfrag(void *from, char *to, int offset, int len, int odd,
468 struct sk_buff *skb)
469{
470 struct raw_frag_vec *rfv = from;
471
472 if (offset < rfv->hlen) {
473 int copy = min(rfv->hlen - offset, len);
474
475 if (skb->ip_summed == CHECKSUM_PARTIAL)
476 memcpy(to, rfv->hdr.c + offset, copy);
477 else
478 skb->csum = csum_block_add(
479 skb->csum,
480 csum_partial_copy_nocheck(rfv->hdr.c + offset,
481 to, copy, 0),
482 odd);
483
484 odd = 0;
485 offset += copy;
486 to += copy;
487 len -= copy;
488
489 if (!len)
490 return 0;
491 }
492
493 offset -= rfv->hlen;
494
495 return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
496}
497
498static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
499{
500 struct inet_sock *inet = inet_sk(sk);
501 struct net *net = sock_net(sk);
502 struct ipcm_cookie ipc;
503 struct rtable *rt = NULL;
504 struct flowi4 fl4;
505 int free = 0;
506 __be32 daddr;
507 __be32 saddr;
508 u8 tos;
509 int err;
510 struct ip_options_data opt_copy;
511 struct raw_frag_vec rfv;
512 int hdrincl;
513
514 err = -EMSGSIZE;
515 if (len > 0xFFFF)
516 goto out;
517
518 /* hdrincl should be READ_ONCE(inet->hdrincl)
519 * but READ_ONCE() doesn't work with bit fields.
520 * Doing this indirectly yields the same result.
521 */
522 hdrincl = inet->hdrincl;
523 hdrincl = READ_ONCE(hdrincl);
524 /*
525 * Check the flags.
526 */
527
528 err = -EOPNOTSUPP;
529 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
530 goto out; /* compatibility */
531
532 /*
533 * Get and verify the address.
534 */
535
536 if (msg->msg_namelen) {
537 DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name);
538 err = -EINVAL;
539 if (msg->msg_namelen < sizeof(*usin))
540 goto out;
541 if (usin->sin_family != AF_INET) {
542 pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n",
543 __func__, current->comm);
544 err = -EAFNOSUPPORT;
545 if (usin->sin_family)
546 goto out;
547 }
548 daddr = usin->sin_addr.s_addr;
549 /* ANK: I did not forget to get protocol from port field.
550 * I just do not know, who uses this weirdness.
551 * IP_HDRINCL is much more convenient.
552 */
553 } else {
554 err = -EDESTADDRREQ;
555 if (sk->sk_state != TCP_ESTABLISHED)
556 goto out;
557 daddr = inet->inet_daddr;
558 }
559
560 ipcm_init_sk(&ipc, inet);
561
562 if (msg->msg_controllen) {
563 err = ip_cmsg_send(sk, msg, &ipc, false);
564 if (unlikely(err)) {
565 kfree(ipc.opt);
566 goto out;
567 }
568 if (ipc.opt)
569 free = 1;
570 }
571
572 saddr = ipc.addr;
573 ipc.addr = daddr;
574
575 if (!ipc.opt) {
576 struct ip_options_rcu *inet_opt;
577
578 rcu_read_lock();
579 inet_opt = rcu_dereference(inet->inet_opt);
580 if (inet_opt) {
581 memcpy(&opt_copy, inet_opt,
582 sizeof(*inet_opt) + inet_opt->opt.optlen);
583 ipc.opt = &opt_copy.opt;
584 }
585 rcu_read_unlock();
586 }
587
588 if (ipc.opt) {
589 err = -EINVAL;
590 /* Linux does not mangle headers on raw sockets,
591 * so that IP options + IP_HDRINCL is non-sense.
592 */
593 if (hdrincl)
594 goto done;
595 if (ipc.opt->opt.srr) {
596 if (!daddr)
597 goto done;
598 daddr = ipc.opt->opt.faddr;
599 }
600 }
601 tos = get_rtconn_flags(&ipc, sk);
602 if (msg->msg_flags & MSG_DONTROUTE)
603 tos |= RTO_ONLINK;
604
605 if (ipv4_is_multicast(daddr)) {
606 if (!ipc.oif || netif_index_is_l3_master(sock_net(sk), ipc.oif))
607 ipc.oif = inet->mc_index;
608 if (!saddr)
609 saddr = inet->mc_addr;
610 } else if (!ipc.oif) {
611 ipc.oif = inet->uc_index;
612 } else if (ipv4_is_lbcast(daddr) && inet->uc_index) {
613 /* oif is set, packet is to local broadcast
614 * and uc_index is set. oif is most likely set
615 * by sk_bound_dev_if. If uc_index != oif check if the
616 * oif is an L3 master and uc_index is an L3 slave.
617 * If so, we want to allow the send using the uc_index.
618 */
619 if (ipc.oif != inet->uc_index &&
620 ipc.oif == l3mdev_master_ifindex_by_index(sock_net(sk),
621 inet->uc_index)) {
622 ipc.oif = inet->uc_index;
623 }
624 }
625
626 flowi4_init_output(&fl4, ipc.oif, ipc.sockc.mark, tos,
627 RT_SCOPE_UNIVERSE,
628 hdrincl ? IPPROTO_RAW : sk->sk_protocol,
629 inet_sk_flowi_flags(sk) |
630 (hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
631 daddr, saddr, 0, 0, sk->sk_uid);
632
633 if (!hdrincl) {
634 rfv.msg = msg;
635 rfv.hlen = 0;
636
637 err = raw_probe_proto_opt(&rfv, &fl4);
638 if (err)
639 goto done;
640 }
641
642 security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
643 rt = ip_route_output_flow(net, &fl4, sk);
644 if (IS_ERR(rt)) {
645 err = PTR_ERR(rt);
646 rt = NULL;
647 goto done;
648 }
649
650 err = -EACCES;
651 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
652 goto done;
653
654 if (msg->msg_flags & MSG_CONFIRM)
655 goto do_confirm;
656back_from_confirm:
657
658 if (hdrincl)
659 err = raw_send_hdrinc(sk, &fl4, msg, len,
660 &rt, msg->msg_flags, &ipc.sockc);
661
662 else {
663 if (!ipc.addr)
664 ipc.addr = fl4.daddr;
665 lock_sock(sk);
666 err = ip_append_data(sk, &fl4, raw_getfrag,
667 &rfv, len, 0,
668 &ipc, &rt, msg->msg_flags);
669 if (err)
670 ip_flush_pending_frames(sk);
671 else if (!(msg->msg_flags & MSG_MORE)) {
672 err = ip_push_pending_frames(sk, &fl4);
673 if (err == -ENOBUFS && !inet->recverr)
674 err = 0;
675 }
676 release_sock(sk);
677 }
678done:
679 if (free)
680 kfree(ipc.opt);
681 ip_rt_put(rt);
682
683out:
684 if (err < 0)
685 return err;
686 return len;
687
688do_confirm:
689 if (msg->msg_flags & MSG_PROBE)
690 dst_confirm_neigh(&rt->dst, &fl4.daddr);
691 if (!(msg->msg_flags & MSG_PROBE) || len)
692 goto back_from_confirm;
693 err = 0;
694 goto done;
695}
696
697static void raw_close(struct sock *sk, long timeout)
698{
699 /*
700 * Raw sockets may have direct kernel references. Kill them.
701 */
702 ip_ra_control(sk, 0, NULL);
703
704 sk_common_release(sk);
705}
706
707static void raw_destroy(struct sock *sk)
708{
709 lock_sock(sk);
710 ip_flush_pending_frames(sk);
711 release_sock(sk);
712}
713
714/* This gets rid of all the nasties in af_inet. -DaveM */
715static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
716{
717 struct inet_sock *inet = inet_sk(sk);
718 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
719 u32 tb_id = RT_TABLE_LOCAL;
720 int ret = -EINVAL;
721 int chk_addr_ret;
722
723 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
724 goto out;
725
726 if (sk->sk_bound_dev_if)
727 tb_id = l3mdev_fib_table_by_index(sock_net(sk),
728 sk->sk_bound_dev_if) ? : tb_id;
729
730 chk_addr_ret = inet_addr_type_table(sock_net(sk), addr->sin_addr.s_addr,
731 tb_id);
732
733 ret = -EADDRNOTAVAIL;
734 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
735 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
736 goto out;
737 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
738 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
739 inet->inet_saddr = 0; /* Use device */
740 sk_dst_reset(sk);
741 ret = 0;
742out: return ret;
743}
744
745/*
746 * This should be easy, if there is something there
747 * we return it, otherwise we block.
748 */
749
750static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
751 int noblock, int flags, int *addr_len)
752{
753 struct inet_sock *inet = inet_sk(sk);
754 size_t copied = 0;
755 int err = -EOPNOTSUPP;
756 DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name);
757 struct sk_buff *skb;
758
759 if (flags & MSG_OOB)
760 goto out;
761
762 if (flags & MSG_ERRQUEUE) {
763 err = ip_recv_error(sk, msg, len, addr_len);
764 goto out;
765 }
766
767 skb = skb_recv_datagram(sk, flags, noblock, &err);
768 if (!skb)
769 goto out;
770
771 copied = skb->len;
772 if (len < copied) {
773 msg->msg_flags |= MSG_TRUNC;
774 copied = len;
775 }
776
777 err = skb_copy_datagram_msg(skb, 0, msg, copied);
778 if (err)
779 goto done;
780
781 sock_recv_ts_and_drops(msg, sk, skb);
782
783 /* Copy the address. */
784 if (sin) {
785 sin->sin_family = AF_INET;
786 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
787 sin->sin_port = 0;
788 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
789 *addr_len = sizeof(*sin);
790 }
791 if (inet->cmsg_flags)
792 ip_cmsg_recv(msg, skb);
793 if (flags & MSG_TRUNC)
794 copied = skb->len;
795done:
796 skb_free_datagram(sk, skb);
797out:
798 if (err)
799 return err;
800 return copied;
801}
802
803static int raw_sk_init(struct sock *sk)
804{
805 struct raw_sock *rp = raw_sk(sk);
806
807 if (inet_sk(sk)->inet_num == IPPROTO_ICMP)
808 memset(&rp->filter, 0, sizeof(rp->filter));
809 return 0;
810}
811
812static int raw_seticmpfilter(struct sock *sk, sockptr_t optval, int optlen)
813{
814 if (optlen > sizeof(struct icmp_filter))
815 optlen = sizeof(struct icmp_filter);
816 if (copy_from_sockptr(&raw_sk(sk)->filter, optval, optlen))
817 return -EFAULT;
818 return 0;
819}
820
821static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
822{
823 int len, ret = -EFAULT;
824
825 if (get_user(len, optlen))
826 goto out;
827 ret = -EINVAL;
828 if (len < 0)
829 goto out;
830 if (len > sizeof(struct icmp_filter))
831 len = sizeof(struct icmp_filter);
832 ret = -EFAULT;
833 if (put_user(len, optlen) ||
834 copy_to_user(optval, &raw_sk(sk)->filter, len))
835 goto out;
836 ret = 0;
837out: return ret;
838}
839
840static int do_raw_setsockopt(struct sock *sk, int level, int optname,
841 sockptr_t optval, unsigned int optlen)
842{
843 if (optname == ICMP_FILTER) {
844 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
845 return -EOPNOTSUPP;
846 else
847 return raw_seticmpfilter(sk, optval, optlen);
848 }
849 return -ENOPROTOOPT;
850}
851
852static int raw_setsockopt(struct sock *sk, int level, int optname,
853 sockptr_t optval, unsigned int optlen)
854{
855 if (level != SOL_RAW)
856 return ip_setsockopt(sk, level, optname, optval, optlen);
857 return do_raw_setsockopt(sk, level, optname, optval, optlen);
858}
859
860static int do_raw_getsockopt(struct sock *sk, int level, int optname,
861 char __user *optval, int __user *optlen)
862{
863 if (optname == ICMP_FILTER) {
864 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
865 return -EOPNOTSUPP;
866 else
867 return raw_geticmpfilter(sk, optval, optlen);
868 }
869 return -ENOPROTOOPT;
870}
871
872static int raw_getsockopt(struct sock *sk, int level, int optname,
873 char __user *optval, int __user *optlen)
874{
875 if (level != SOL_RAW)
876 return ip_getsockopt(sk, level, optname, optval, optlen);
877 return do_raw_getsockopt(sk, level, optname, optval, optlen);
878}
879
880static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
881{
882 switch (cmd) {
883 case SIOCOUTQ: {
884 int amount = sk_wmem_alloc_get(sk);
885
886 return put_user(amount, (int __user *)arg);
887 }
888 case SIOCINQ: {
889 struct sk_buff *skb;
890 int amount = 0;
891
892 spin_lock_bh(&sk->sk_receive_queue.lock);
893 skb = skb_peek(&sk->sk_receive_queue);
894 if (skb)
895 amount = skb->len;
896 spin_unlock_bh(&sk->sk_receive_queue.lock);
897 return put_user(amount, (int __user *)arg);
898 }
899
900 default:
901#ifdef CONFIG_IP_MROUTE
902 return ipmr_ioctl(sk, cmd, (void __user *)arg);
903#else
904 return -ENOIOCTLCMD;
905#endif
906 }
907}
908
909#ifdef CONFIG_COMPAT
910static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
911{
912 switch (cmd) {
913 case SIOCOUTQ:
914 case SIOCINQ:
915 return -ENOIOCTLCMD;
916 default:
917#ifdef CONFIG_IP_MROUTE
918 return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
919#else
920 return -ENOIOCTLCMD;
921#endif
922 }
923}
924#endif
925
926int raw_abort(struct sock *sk, int err)
927{
928 lock_sock(sk);
929
930 sk->sk_err = err;
931 sk->sk_error_report(sk);
932 __udp_disconnect(sk, 0);
933
934 release_sock(sk);
935
936 return 0;
937}
938EXPORT_SYMBOL_GPL(raw_abort);
939
940struct proto raw_prot = {
941 .name = "RAW",
942 .owner = THIS_MODULE,
943 .close = raw_close,
944 .destroy = raw_destroy,
945 .connect = ip4_datagram_connect,
946 .disconnect = __udp_disconnect,
947 .ioctl = raw_ioctl,
948 .init = raw_sk_init,
949 .setsockopt = raw_setsockopt,
950 .getsockopt = raw_getsockopt,
951 .sendmsg = raw_sendmsg,
952 .recvmsg = raw_recvmsg,
953 .bind = raw_bind,
954 .backlog_rcv = raw_rcv_skb,
955 .release_cb = ip4_datagram_release_cb,
956 .hash = raw_hash_sk,
957 .unhash = raw_unhash_sk,
958 .obj_size = sizeof(struct raw_sock),
959 .useroffset = offsetof(struct raw_sock, filter),
960 .usersize = sizeof_field(struct raw_sock, filter),
961 .h.raw_hash = &raw_v4_hashinfo,
962#ifdef CONFIG_COMPAT
963 .compat_ioctl = compat_raw_ioctl,
964#endif
965 .diag_destroy = raw_abort,
966};
967
968#ifdef CONFIG_PROC_FS
969static struct sock *raw_get_first(struct seq_file *seq)
970{
971 struct sock *sk;
972 struct raw_hashinfo *h = PDE_DATA(file_inode(seq->file));
973 struct raw_iter_state *state = raw_seq_private(seq);
974
975 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
976 ++state->bucket) {
977 sk_for_each(sk, &h->ht[state->bucket])
978 if (sock_net(sk) == seq_file_net(seq))
979 goto found;
980 }
981 sk = NULL;
982found:
983 return sk;
984}
985
986static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
987{
988 struct raw_hashinfo *h = PDE_DATA(file_inode(seq->file));
989 struct raw_iter_state *state = raw_seq_private(seq);
990
991 do {
992 sk = sk_next(sk);
993try_again:
994 ;
995 } while (sk && sock_net(sk) != seq_file_net(seq));
996
997 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
998 sk = sk_head(&h->ht[state->bucket]);
999 goto try_again;
1000 }
1001 return sk;
1002}
1003
1004static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
1005{
1006 struct sock *sk = raw_get_first(seq);
1007
1008 if (sk)
1009 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
1010 --pos;
1011 return pos ? NULL : sk;
1012}
1013
1014void *raw_seq_start(struct seq_file *seq, loff_t *pos)
1015 __acquires(&h->lock)
1016{
1017 struct raw_hashinfo *h = PDE_DATA(file_inode(seq->file));
1018
1019 read_lock(&h->lock);
1020 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
1021}
1022EXPORT_SYMBOL_GPL(raw_seq_start);
1023
1024void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1025{
1026 struct sock *sk;
1027
1028 if (v == SEQ_START_TOKEN)
1029 sk = raw_get_first(seq);
1030 else
1031 sk = raw_get_next(seq, v);
1032 ++*pos;
1033 return sk;
1034}
1035EXPORT_SYMBOL_GPL(raw_seq_next);
1036
1037void raw_seq_stop(struct seq_file *seq, void *v)
1038 __releases(&h->lock)
1039{
1040 struct raw_hashinfo *h = PDE_DATA(file_inode(seq->file));
1041
1042 read_unlock(&h->lock);
1043}
1044EXPORT_SYMBOL_GPL(raw_seq_stop);
1045
1046static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1047{
1048 struct inet_sock *inet = inet_sk(sp);
1049 __be32 dest = inet->inet_daddr,
1050 src = inet->inet_rcv_saddr;
1051 __u16 destp = 0,
1052 srcp = inet->inet_num;
1053
1054 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
1055 " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n",
1056 i, src, srcp, dest, destp, sp->sk_state,
1057 sk_wmem_alloc_get(sp),
1058 sk_rmem_alloc_get(sp),
1059 0, 0L, 0,
1060 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
1061 0, sock_i_ino(sp),
1062 refcount_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1063}
1064
1065static int raw_seq_show(struct seq_file *seq, void *v)
1066{
1067 if (v == SEQ_START_TOKEN)
1068 seq_printf(seq, " sl local_address rem_address st tx_queue "
1069 "rx_queue tr tm->when retrnsmt uid timeout "
1070 "inode ref pointer drops\n");
1071 else
1072 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1073 return 0;
1074}
1075
1076static const struct seq_operations raw_seq_ops = {
1077 .start = raw_seq_start,
1078 .next = raw_seq_next,
1079 .stop = raw_seq_stop,
1080 .show = raw_seq_show,
1081};
1082
1083static __net_init int raw_init_net(struct net *net)
1084{
1085 if (!proc_create_net_data("raw", 0444, net->proc_net, &raw_seq_ops,
1086 sizeof(struct raw_iter_state), &raw_v4_hashinfo))
1087 return -ENOMEM;
1088
1089 return 0;
1090}
1091
1092static __net_exit void raw_exit_net(struct net *net)
1093{
1094 remove_proc_entry("raw", net->proc_net);
1095}
1096
1097static __net_initdata struct pernet_operations raw_net_ops = {
1098 .init = raw_init_net,
1099 .exit = raw_exit_net,
1100};
1101
1102int __init raw_proc_init(void)
1103{
1104 return register_pernet_subsys(&raw_net_ops);
1105}
1106
1107void __init raw_proc_exit(void)
1108{
1109 unregister_pernet_subsys(&raw_net_ops);
1110}
1111#endif /* CONFIG_PROC_FS */
1112
1113static void raw_sysctl_init_net(struct net *net)
1114{
1115#ifdef CONFIG_NET_L3_MASTER_DEV
1116 net->ipv4.sysctl_raw_l3mdev_accept = 1;
1117#endif
1118}
1119
1120static int __net_init raw_sysctl_init(struct net *net)
1121{
1122 raw_sysctl_init_net(net);
1123 return 0;
1124}
1125
1126static struct pernet_operations __net_initdata raw_sysctl_ops = {
1127 .init = raw_sysctl_init,
1128};
1129
1130void __init raw_init(void)
1131{
1132 raw_sysctl_init_net(&init_net);
1133 if (register_pernet_subsys(&raw_sysctl_ops))
1134 panic("RAW: failed to init sysctl parameters.\n");
1135}
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 struct hlist_node *node;
115
116 sk_for_each_from(sk, node) {
117 struct inet_sock *inet = inet_sk(sk);
118
119 if (net_eq(sock_net(sk), net) && inet->inet_num == num &&
120 !(inet->inet_daddr && inet->inet_daddr != raddr) &&
121 !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) &&
122 !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
123 goto found; /* gotcha */
124 }
125 sk = NULL;
126found:
127 return sk;
128}
129
130/*
131 * 0 - deliver
132 * 1 - block
133 */
134static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb)
135{
136 int type;
137
138 if (!pskb_may_pull(skb, sizeof(struct icmphdr)))
139 return 1;
140
141 type = icmp_hdr(skb)->type;
142 if (type < 32) {
143 __u32 data = raw_sk(sk)->filter.data;
144
145 return ((1 << 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 /* Report error on raw socket, if:
220 1. User requested ip_recverr.
221 2. Socket is connected (otherwise the error indication
222 is useless without ip_recverr and error is hard.
223 */
224 if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED)
225 return;
226
227 switch (type) {
228 default:
229 case ICMP_TIME_EXCEEDED:
230 err = EHOSTUNREACH;
231 break;
232 case ICMP_SOURCE_QUENCH:
233 return;
234 case ICMP_PARAMETERPROB:
235 err = EPROTO;
236 harderr = 1;
237 break;
238 case ICMP_DEST_UNREACH:
239 err = EHOSTUNREACH;
240 if (code > NR_ICMP_UNREACH)
241 break;
242 err = icmp_err_convert[code].errno;
243 harderr = icmp_err_convert[code].fatal;
244 if (code == ICMP_FRAG_NEEDED) {
245 harderr = inet->pmtudisc != IP_PMTUDISC_DONT;
246 err = EMSGSIZE;
247 }
248 }
249
250 if (inet->recverr) {
251 const struct iphdr *iph = (const struct iphdr *)skb->data;
252 u8 *payload = skb->data + (iph->ihl << 2);
253
254 if (inet->hdrincl)
255 payload = skb->data;
256 ip_icmp_error(sk, skb, err, 0, info, payload);
257 }
258
259 if (inet->recverr || harderr) {
260 sk->sk_err = err;
261 sk->sk_error_report(sk);
262 }
263}
264
265void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
266{
267 int hash;
268 struct sock *raw_sk;
269 const struct iphdr *iph;
270 struct net *net;
271
272 hash = protocol & (RAW_HTABLE_SIZE - 1);
273
274 read_lock(&raw_v4_hashinfo.lock);
275 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
276 if (raw_sk != NULL) {
277 iph = (const struct iphdr *)skb->data;
278 net = dev_net(skb->dev);
279
280 while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
281 iph->daddr, iph->saddr,
282 skb->dev->ifindex)) != NULL) {
283 raw_err(raw_sk, skb, info);
284 raw_sk = sk_next(raw_sk);
285 iph = (const struct iphdr *)skb->data;
286 }
287 }
288 read_unlock(&raw_v4_hashinfo.lock);
289}
290
291static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
292{
293 /* Charge it to the socket. */
294
295 ipv4_pktinfo_prepare(skb);
296 if (sock_queue_rcv_skb(sk, skb) < 0) {
297 kfree_skb(skb);
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(skb);
309 return NET_RX_DROP;
310 }
311 nf_reset(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 void *from, size_t length,
321 struct rtable **rtp,
322 unsigned int flags)
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 (flags&MSG_PROBE)
339 goto out;
340
341 hlen = LL_RESERVED_SPACE(rt->dst.dev);
342 tlen = rt->dst.dev->needed_tailroom;
343 skb = sock_alloc_send_skb(sk,
344 length + hlen + tlen + 15,
345 flags & MSG_DONTWAIT, &err);
346 if (skb == NULL)
347 goto error;
348 skb_reserve(skb, hlen);
349
350 skb->priority = sk->sk_priority;
351 skb->mark = sk->sk_mark;
352 skb_dst_set(skb, &rt->dst);
353 *rtp = NULL;
354
355 skb_reset_network_header(skb);
356 iph = ip_hdr(skb);
357 skb_put(skb, length);
358
359 skb->ip_summed = CHECKSUM_NONE;
360
361 skb->transport_header = skb->network_header;
362 err = -EFAULT;
363 if (memcpy_fromiovecend((void *)iph, from, 0, length))
364 goto error_free;
365
366 iphlen = iph->ihl * 4;
367
368 /*
369 * We don't want to modify the ip header, but we do need to
370 * be sure that it won't cause problems later along the network
371 * stack. Specifically we want to make sure that iph->ihl is a
372 * sane value. If ihl points beyond the length of the buffer passed
373 * in, reject the frame as invalid
374 */
375 err = -EINVAL;
376 if (iphlen > length)
377 goto error_free;
378
379 if (iphlen >= sizeof(*iph)) {
380 if (!iph->saddr)
381 iph->saddr = fl4->saddr;
382 iph->check = 0;
383 iph->tot_len = htons(length);
384 if (!iph->id)
385 ip_select_ident(iph, &rt->dst, NULL);
386
387 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
388 }
389 if (iph->protocol == IPPROTO_ICMP)
390 icmp_out_count(net, ((struct icmphdr *)
391 skb_transport_header(skb))->type);
392
393 err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL,
394 rt->dst.dev, dst_output);
395 if (err > 0)
396 err = net_xmit_errno(err);
397 if (err)
398 goto error;
399out:
400 return 0;
401
402error_free:
403 kfree_skb(skb);
404error:
405 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
406 if (err == -ENOBUFS && !inet->recverr)
407 err = 0;
408 return err;
409}
410
411static int raw_probe_proto_opt(struct flowi4 *fl4, struct msghdr *msg)
412{
413 struct iovec *iov;
414 u8 __user *type = NULL;
415 u8 __user *code = NULL;
416 int probed = 0;
417 unsigned int i;
418
419 if (!msg->msg_iov)
420 return 0;
421
422 for (i = 0; i < msg->msg_iovlen; i++) {
423 iov = &msg->msg_iov[i];
424 if (!iov)
425 continue;
426
427 switch (fl4->flowi4_proto) {
428 case IPPROTO_ICMP:
429 /* check if one-byte field is readable or not. */
430 if (iov->iov_base && iov->iov_len < 1)
431 break;
432
433 if (!type) {
434 type = iov->iov_base;
435 /* check if code field is readable or not. */
436 if (iov->iov_len > 1)
437 code = type + 1;
438 } else if (!code)
439 code = iov->iov_base;
440
441 if (type && code) {
442 if (get_user(fl4->fl4_icmp_type, type) ||
443 get_user(fl4->fl4_icmp_code, code))
444 return -EFAULT;
445 probed = 1;
446 }
447 break;
448 default:
449 probed = 1;
450 break;
451 }
452 if (probed)
453 break;
454 }
455 return 0;
456}
457
458static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
459 size_t len)
460{
461 struct inet_sock *inet = inet_sk(sk);
462 struct ipcm_cookie ipc;
463 struct rtable *rt = NULL;
464 struct flowi4 fl4;
465 int free = 0;
466 __be32 daddr;
467 __be32 saddr;
468 u8 tos;
469 int err;
470 struct ip_options_data opt_copy;
471
472 err = -EMSGSIZE;
473 if (len > 0xFFFF)
474 goto out;
475
476 /*
477 * Check the flags.
478 */
479
480 err = -EOPNOTSUPP;
481 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
482 goto out; /* compatibility */
483
484 /*
485 * Get and verify the address.
486 */
487
488 if (msg->msg_namelen) {
489 struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name;
490 err = -EINVAL;
491 if (msg->msg_namelen < sizeof(*usin))
492 goto out;
493 if (usin->sin_family != AF_INET) {
494 pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n",
495 __func__, current->comm);
496 err = -EAFNOSUPPORT;
497 if (usin->sin_family)
498 goto out;
499 }
500 daddr = usin->sin_addr.s_addr;
501 /* ANK: I did not forget to get protocol from port field.
502 * I just do not know, who uses this weirdness.
503 * IP_HDRINCL is much more convenient.
504 */
505 } else {
506 err = -EDESTADDRREQ;
507 if (sk->sk_state != TCP_ESTABLISHED)
508 goto out;
509 daddr = inet->inet_daddr;
510 }
511
512 ipc.addr = inet->inet_saddr;
513 ipc.opt = NULL;
514 ipc.tx_flags = 0;
515 ipc.oif = sk->sk_bound_dev_if;
516
517 if (msg->msg_controllen) {
518 err = ip_cmsg_send(sock_net(sk), msg, &ipc);
519 if (err)
520 goto out;
521 if (ipc.opt)
522 free = 1;
523 }
524
525 saddr = ipc.addr;
526 ipc.addr = daddr;
527
528 if (!ipc.opt) {
529 struct ip_options_rcu *inet_opt;
530
531 rcu_read_lock();
532 inet_opt = rcu_dereference(inet->inet_opt);
533 if (inet_opt) {
534 memcpy(&opt_copy, inet_opt,
535 sizeof(*inet_opt) + inet_opt->opt.optlen);
536 ipc.opt = &opt_copy.opt;
537 }
538 rcu_read_unlock();
539 }
540
541 if (ipc.opt) {
542 err = -EINVAL;
543 /* Linux does not mangle headers on raw sockets,
544 * so that IP options + IP_HDRINCL is non-sense.
545 */
546 if (inet->hdrincl)
547 goto done;
548 if (ipc.opt->opt.srr) {
549 if (!daddr)
550 goto done;
551 daddr = ipc.opt->opt.faddr;
552 }
553 }
554 tos = RT_CONN_FLAGS(sk);
555 if (msg->msg_flags & MSG_DONTROUTE)
556 tos |= RTO_ONLINK;
557
558 if (ipv4_is_multicast(daddr)) {
559 if (!ipc.oif)
560 ipc.oif = inet->mc_index;
561 if (!saddr)
562 saddr = inet->mc_addr;
563 } else if (!ipc.oif)
564 ipc.oif = inet->uc_index;
565
566 flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
567 RT_SCOPE_UNIVERSE,
568 inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
569 inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP,
570 daddr, saddr, 0, 0);
571
572 if (!inet->hdrincl) {
573 err = raw_probe_proto_opt(&fl4, msg);
574 if (err)
575 goto done;
576 }
577
578 security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
579 rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
580 if (IS_ERR(rt)) {
581 err = PTR_ERR(rt);
582 rt = NULL;
583 goto done;
584 }
585
586 err = -EACCES;
587 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
588 goto done;
589
590 if (msg->msg_flags & MSG_CONFIRM)
591 goto do_confirm;
592back_from_confirm:
593
594 if (inet->hdrincl)
595 err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len,
596 &rt, msg->msg_flags);
597
598 else {
599 if (!ipc.addr)
600 ipc.addr = fl4.daddr;
601 lock_sock(sk);
602 err = ip_append_data(sk, &fl4, ip_generic_getfrag,
603 msg->msg_iov, len, 0,
604 &ipc, &rt, msg->msg_flags);
605 if (err)
606 ip_flush_pending_frames(sk);
607 else if (!(msg->msg_flags & MSG_MORE)) {
608 err = ip_push_pending_frames(sk, &fl4);
609 if (err == -ENOBUFS && !inet->recverr)
610 err = 0;
611 }
612 release_sock(sk);
613 }
614done:
615 if (free)
616 kfree(ipc.opt);
617 ip_rt_put(rt);
618
619out:
620 if (err < 0)
621 return err;
622 return len;
623
624do_confirm:
625 dst_confirm(&rt->dst);
626 if (!(msg->msg_flags & MSG_PROBE) || len)
627 goto back_from_confirm;
628 err = 0;
629 goto done;
630}
631
632static void raw_close(struct sock *sk, long timeout)
633{
634 /*
635 * Raw sockets may have direct kernel references. Kill them.
636 */
637 ip_ra_control(sk, 0, NULL);
638
639 sk_common_release(sk);
640}
641
642static void raw_destroy(struct sock *sk)
643{
644 lock_sock(sk);
645 ip_flush_pending_frames(sk);
646 release_sock(sk);
647}
648
649/* This gets rid of all the nasties in af_inet. -DaveM */
650static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
651{
652 struct inet_sock *inet = inet_sk(sk);
653 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
654 int ret = -EINVAL;
655 int chk_addr_ret;
656
657 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
658 goto out;
659 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
660 ret = -EADDRNOTAVAIL;
661 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
662 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
663 goto out;
664 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
665 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
666 inet->inet_saddr = 0; /* Use device */
667 sk_dst_reset(sk);
668 ret = 0;
669out: return ret;
670}
671
672/*
673 * This should be easy, if there is something there
674 * we return it, otherwise we block.
675 */
676
677static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
678 size_t len, int noblock, int flags, int *addr_len)
679{
680 struct inet_sock *inet = inet_sk(sk);
681 size_t copied = 0;
682 int err = -EOPNOTSUPP;
683 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
684 struct sk_buff *skb;
685
686 if (flags & MSG_OOB)
687 goto out;
688
689 if (addr_len)
690 *addr_len = sizeof(*sin);
691
692 if (flags & MSG_ERRQUEUE) {
693 err = ip_recv_error(sk, msg, len);
694 goto out;
695 }
696
697 skb = skb_recv_datagram(sk, flags, noblock, &err);
698 if (!skb)
699 goto out;
700
701 copied = skb->len;
702 if (len < copied) {
703 msg->msg_flags |= MSG_TRUNC;
704 copied = len;
705 }
706
707 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
708 if (err)
709 goto done;
710
711 sock_recv_ts_and_drops(msg, sk, skb);
712
713 /* Copy the address. */
714 if (sin) {
715 sin->sin_family = AF_INET;
716 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
717 sin->sin_port = 0;
718 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
719 }
720 if (inet->cmsg_flags)
721 ip_cmsg_recv(msg, skb);
722 if (flags & MSG_TRUNC)
723 copied = skb->len;
724done:
725 skb_free_datagram(sk, skb);
726out:
727 if (err)
728 return err;
729 return copied;
730}
731
732static int raw_init(struct sock *sk)
733{
734 struct raw_sock *rp = raw_sk(sk);
735
736 if (inet_sk(sk)->inet_num == IPPROTO_ICMP)
737 memset(&rp->filter, 0, sizeof(rp->filter));
738 return 0;
739}
740
741static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
742{
743 if (optlen > sizeof(struct icmp_filter))
744 optlen = sizeof(struct icmp_filter);
745 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
746 return -EFAULT;
747 return 0;
748}
749
750static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
751{
752 int len, ret = -EFAULT;
753
754 if (get_user(len, optlen))
755 goto out;
756 ret = -EINVAL;
757 if (len < 0)
758 goto out;
759 if (len > sizeof(struct icmp_filter))
760 len = sizeof(struct icmp_filter);
761 ret = -EFAULT;
762 if (put_user(len, optlen) ||
763 copy_to_user(optval, &raw_sk(sk)->filter, len))
764 goto out;
765 ret = 0;
766out: return ret;
767}
768
769static int do_raw_setsockopt(struct sock *sk, int level, int optname,
770 char __user *optval, unsigned int optlen)
771{
772 if (optname == ICMP_FILTER) {
773 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
774 return -EOPNOTSUPP;
775 else
776 return raw_seticmpfilter(sk, optval, optlen);
777 }
778 return -ENOPROTOOPT;
779}
780
781static int raw_setsockopt(struct sock *sk, int level, int optname,
782 char __user *optval, unsigned int optlen)
783{
784 if (level != SOL_RAW)
785 return ip_setsockopt(sk, level, optname, optval, optlen);
786 return do_raw_setsockopt(sk, level, optname, optval, optlen);
787}
788
789#ifdef CONFIG_COMPAT
790static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
791 char __user *optval, unsigned int optlen)
792{
793 if (level != SOL_RAW)
794 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
795 return do_raw_setsockopt(sk, level, optname, optval, optlen);
796}
797#endif
798
799static int do_raw_getsockopt(struct sock *sk, int level, int optname,
800 char __user *optval, int __user *optlen)
801{
802 if (optname == ICMP_FILTER) {
803 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
804 return -EOPNOTSUPP;
805 else
806 return raw_geticmpfilter(sk, optval, optlen);
807 }
808 return -ENOPROTOOPT;
809}
810
811static int raw_getsockopt(struct sock *sk, int level, int optname,
812 char __user *optval, int __user *optlen)
813{
814 if (level != SOL_RAW)
815 return ip_getsockopt(sk, level, optname, optval, optlen);
816 return do_raw_getsockopt(sk, level, optname, optval, optlen);
817}
818
819#ifdef CONFIG_COMPAT
820static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
821 char __user *optval, int __user *optlen)
822{
823 if (level != SOL_RAW)
824 return compat_ip_getsockopt(sk, level, optname, optval, optlen);
825 return do_raw_getsockopt(sk, level, optname, optval, optlen);
826}
827#endif
828
829static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
830{
831 switch (cmd) {
832 case SIOCOUTQ: {
833 int amount = sk_wmem_alloc_get(sk);
834
835 return put_user(amount, (int __user *)arg);
836 }
837 case SIOCINQ: {
838 struct sk_buff *skb;
839 int amount = 0;
840
841 spin_lock_bh(&sk->sk_receive_queue.lock);
842 skb = skb_peek(&sk->sk_receive_queue);
843 if (skb != NULL)
844 amount = skb->len;
845 spin_unlock_bh(&sk->sk_receive_queue.lock);
846 return put_user(amount, (int __user *)arg);
847 }
848
849 default:
850#ifdef CONFIG_IP_MROUTE
851 return ipmr_ioctl(sk, cmd, (void __user *)arg);
852#else
853 return -ENOIOCTLCMD;
854#endif
855 }
856}
857
858#ifdef CONFIG_COMPAT
859static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
860{
861 switch (cmd) {
862 case SIOCOUTQ:
863 case SIOCINQ:
864 return -ENOIOCTLCMD;
865 default:
866#ifdef CONFIG_IP_MROUTE
867 return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
868#else
869 return -ENOIOCTLCMD;
870#endif
871 }
872}
873#endif
874
875struct proto raw_prot = {
876 .name = "RAW",
877 .owner = THIS_MODULE,
878 .close = raw_close,
879 .destroy = raw_destroy,
880 .connect = ip4_datagram_connect,
881 .disconnect = udp_disconnect,
882 .ioctl = raw_ioctl,
883 .init = raw_init,
884 .setsockopt = raw_setsockopt,
885 .getsockopt = raw_getsockopt,
886 .sendmsg = raw_sendmsg,
887 .recvmsg = raw_recvmsg,
888 .bind = raw_bind,
889 .backlog_rcv = raw_rcv_skb,
890 .hash = raw_hash_sk,
891 .unhash = raw_unhash_sk,
892 .obj_size = sizeof(struct raw_sock),
893 .h.raw_hash = &raw_v4_hashinfo,
894#ifdef CONFIG_COMPAT
895 .compat_setsockopt = compat_raw_setsockopt,
896 .compat_getsockopt = compat_raw_getsockopt,
897 .compat_ioctl = compat_raw_ioctl,
898#endif
899};
900
901#ifdef CONFIG_PROC_FS
902static struct sock *raw_get_first(struct seq_file *seq)
903{
904 struct sock *sk;
905 struct raw_iter_state *state = raw_seq_private(seq);
906
907 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
908 ++state->bucket) {
909 struct hlist_node *node;
910
911 sk_for_each(sk, node, &state->h->ht[state->bucket])
912 if (sock_net(sk) == seq_file_net(seq))
913 goto found;
914 }
915 sk = NULL;
916found:
917 return sk;
918}
919
920static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
921{
922 struct raw_iter_state *state = raw_seq_private(seq);
923
924 do {
925 sk = sk_next(sk);
926try_again:
927 ;
928 } while (sk && sock_net(sk) != seq_file_net(seq));
929
930 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
931 sk = sk_head(&state->h->ht[state->bucket]);
932 goto try_again;
933 }
934 return sk;
935}
936
937static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
938{
939 struct sock *sk = raw_get_first(seq);
940
941 if (sk)
942 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
943 --pos;
944 return pos ? NULL : sk;
945}
946
947void *raw_seq_start(struct seq_file *seq, loff_t *pos)
948{
949 struct raw_iter_state *state = raw_seq_private(seq);
950
951 read_lock(&state->h->lock);
952 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
953}
954EXPORT_SYMBOL_GPL(raw_seq_start);
955
956void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
957{
958 struct sock *sk;
959
960 if (v == SEQ_START_TOKEN)
961 sk = raw_get_first(seq);
962 else
963 sk = raw_get_next(seq, v);
964 ++*pos;
965 return sk;
966}
967EXPORT_SYMBOL_GPL(raw_seq_next);
968
969void raw_seq_stop(struct seq_file *seq, void *v)
970{
971 struct raw_iter_state *state = raw_seq_private(seq);
972
973 read_unlock(&state->h->lock);
974}
975EXPORT_SYMBOL_GPL(raw_seq_stop);
976
977static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
978{
979 struct inet_sock *inet = inet_sk(sp);
980 __be32 dest = inet->inet_daddr,
981 src = inet->inet_rcv_saddr;
982 __u16 destp = 0,
983 srcp = inet->inet_num;
984
985 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
986 " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n",
987 i, src, srcp, dest, destp, sp->sk_state,
988 sk_wmem_alloc_get(sp),
989 sk_rmem_alloc_get(sp),
990 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
991 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
992}
993
994static int raw_seq_show(struct seq_file *seq, void *v)
995{
996 if (v == SEQ_START_TOKEN)
997 seq_printf(seq, " sl local_address rem_address st tx_queue "
998 "rx_queue tr tm->when retrnsmt uid timeout "
999 "inode ref pointer drops\n");
1000 else
1001 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1002 return 0;
1003}
1004
1005static const struct seq_operations raw_seq_ops = {
1006 .start = raw_seq_start,
1007 .next = raw_seq_next,
1008 .stop = raw_seq_stop,
1009 .show = raw_seq_show,
1010};
1011
1012int raw_seq_open(struct inode *ino, struct file *file,
1013 struct raw_hashinfo *h, const struct seq_operations *ops)
1014{
1015 int err;
1016 struct raw_iter_state *i;
1017
1018 err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state));
1019 if (err < 0)
1020 return err;
1021
1022 i = raw_seq_private((struct seq_file *)file->private_data);
1023 i->h = h;
1024 return 0;
1025}
1026EXPORT_SYMBOL_GPL(raw_seq_open);
1027
1028static int raw_v4_seq_open(struct inode *inode, struct file *file)
1029{
1030 return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops);
1031}
1032
1033static const struct file_operations raw_seq_fops = {
1034 .owner = THIS_MODULE,
1035 .open = raw_v4_seq_open,
1036 .read = seq_read,
1037 .llseek = seq_lseek,
1038 .release = seq_release_net,
1039};
1040
1041static __net_init int raw_init_net(struct net *net)
1042{
1043 if (!proc_net_fops_create(net, "raw", S_IRUGO, &raw_seq_fops))
1044 return -ENOMEM;
1045
1046 return 0;
1047}
1048
1049static __net_exit void raw_exit_net(struct net *net)
1050{
1051 proc_net_remove(net, "raw");
1052}
1053
1054static __net_initdata struct pernet_operations raw_net_ops = {
1055 .init = raw_init_net,
1056 .exit = raw_exit_net,
1057};
1058
1059int __init raw_proc_init(void)
1060{
1061 return register_pernet_subsys(&raw_net_ops);
1062}
1063
1064void __init raw_proc_exit(void)
1065{
1066 unregister_pernet_subsys(&raw_net_ops);
1067}
1068#endif /* CONFIG_PROC_FS */