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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/kernel.h>
50#include <linux/export.h>
51#include <linux/spinlock.h>
52#include <linux/sockios.h>
53#include <linux/socket.h>
54#include <linux/in.h>
55#include <linux/mroute.h>
56#include <linux/netdevice.h>
57#include <linux/in_route.h>
58#include <linux/route.h>
59#include <linux/skbuff.h>
60#include <linux/igmp.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#include <linux/uio.h>
82
83struct raw_frag_vec {
84 struct msghdr *msg;
85 union {
86 struct icmphdr icmph;
87 char c[1];
88 } hdr;
89 int hlen;
90};
91
92static struct raw_hashinfo raw_v4_hashinfo = {
93 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
94};
95
96int raw_hash_sk(struct sock *sk)
97{
98 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
99 struct hlist_head *head;
100
101 head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)];
102
103 write_lock_bh(&h->lock);
104 sk_add_node(sk, head);
105 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
106 write_unlock_bh(&h->lock);
107
108 return 0;
109}
110EXPORT_SYMBOL_GPL(raw_hash_sk);
111
112void raw_unhash_sk(struct sock *sk)
113{
114 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
115
116 write_lock_bh(&h->lock);
117 if (sk_del_node_init(sk))
118 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
119 write_unlock_bh(&h->lock);
120}
121EXPORT_SYMBOL_GPL(raw_unhash_sk);
122
123static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk,
124 unsigned short num, __be32 raddr, __be32 laddr, int dif)
125{
126 sk_for_each_from(sk) {
127 struct inet_sock *inet = inet_sk(sk);
128
129 if (net_eq(sock_net(sk), net) && inet->inet_num == num &&
130 !(inet->inet_daddr && inet->inet_daddr != raddr) &&
131 !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) &&
132 !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
133 goto found;
134 }
135 sk = NULL;
136found:
137 return sk;
138}
139
140
141
142
143
144static int icmp_filter(const struct sock *sk, const struct sk_buff *skb)
145{
146 struct icmphdr _hdr;
147 const struct icmphdr *hdr;
148
149 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
150 sizeof(_hdr), &_hdr);
151 if (!hdr)
152 return 1;
153
154 if (hdr->type < 32) {
155 __u32 data = raw_sk(sk)->filter.data;
156
157 return ((1U << hdr->type) & data) != 0;
158 }
159
160
161 return 0;
162}
163
164
165
166
167
168
169
170static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
171{
172 struct sock *sk;
173 struct hlist_head *head;
174 int delivered = 0;
175 struct net *net;
176
177 read_lock(&raw_v4_hashinfo.lock);
178 head = &raw_v4_hashinfo.ht[hash];
179 if (hlist_empty(head))
180 goto out;
181
182 net = dev_net(skb->dev);
183 sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol,
184 iph->saddr, iph->daddr,
185 skb->dev->ifindex);
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)) {
192 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
193
194
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 skb->dev->ifindex);
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
216
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
241
242
243
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 iph = (const struct iphdr *)skb->data;
299 net = dev_net(skb->dev);
300
301 while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
302 iph->daddr, iph->saddr,
303 skb->dev->ifindex)) != NULL) {
304 raw_err(raw_sk, skb, info);
305 raw_sk = sk_next(raw_sk);
306 iph = (const struct iphdr *)skb->data;
307 }
308 }
309 read_unlock(&raw_v4_hashinfo.lock);
310}
311
312static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
313{
314
315
316 ipv4_pktinfo_prepare(sk, skb);
317 if (sock_queue_rcv_skb(sk, skb) < 0) {
318 kfree_skb(skb);
319 return NET_RX_DROP;
320 }
321
322 return NET_RX_SUCCESS;
323}
324
325int raw_rcv(struct sock *sk, struct sk_buff *skb)
326{
327 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
328 atomic_inc(&sk->sk_drops);
329 kfree_skb(skb);
330 return NET_RX_DROP;
331 }
332 nf_reset(skb);
333
334 skb_push(skb, skb->data - skb_network_header(skb));
335
336 raw_rcv_skb(sk, skb);
337 return 0;
338}
339
340static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
341 struct msghdr *msg, size_t length,
342 struct rtable **rtp, unsigned int flags,
343 const struct sockcm_cookie *sockc)
344{
345 struct inet_sock *inet = inet_sk(sk);
346 struct net *net = sock_net(sk);
347 struct iphdr *iph;
348 struct sk_buff *skb;
349 unsigned int iphlen;
350 int err;
351 struct rtable *rt = *rtp;
352 int hlen, tlen;
353
354 if (length > rt->dst.dev->mtu) {
355 ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
356 rt->dst.dev->mtu);
357 return -EMSGSIZE;
358 }
359 if (flags&MSG_PROBE)
360 goto out;
361
362 hlen = LL_RESERVED_SPACE(rt->dst.dev);
363 tlen = rt->dst.dev->needed_tailroom;
364 skb = sock_alloc_send_skb(sk,
365 length + hlen + tlen + 15,
366 flags & MSG_DONTWAIT, &err);
367 if (!skb)
368 goto error;
369 skb_reserve(skb, hlen);
370
371 skb->priority = sk->sk_priority;
372 skb->mark = sk->sk_mark;
373 skb_dst_set(skb, &rt->dst);
374 *rtp = NULL;
375
376 skb_reset_network_header(skb);
377 iph = ip_hdr(skb);
378 skb_put(skb, length);
379
380 skb->ip_summed = CHECKSUM_NONE;
381
382 sock_tx_timestamp(sk, sockc->tsflags, &skb_shinfo(skb)->tx_flags);
383
384 skb->transport_header = skb->network_header;
385 err = -EFAULT;
386 if (memcpy_from_msg(iph, msg, length))
387 goto error_free;
388
389 iphlen = iph->ihl * 4;
390
391
392
393
394
395
396
397
398 err = -EINVAL;
399 if (iphlen > length)
400 goto error_free;
401
402 if (iphlen >= sizeof(*iph)) {
403 if (!iph->saddr)
404 iph->saddr = fl4->saddr;
405 iph->check = 0;
406 iph->tot_len = htons(length);
407 if (!iph->id)
408 ip_select_ident(net, skb, NULL);
409
410 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
411 skb->transport_header += iphlen;
412 if (iph->protocol == IPPROTO_ICMP &&
413 length >= iphlen + sizeof(struct icmphdr))
414 icmp_out_count(net, ((struct icmphdr *)
415 skb_transport_header(skb))->type);
416 }
417
418 err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT,
419 net, sk, skb, NULL, rt->dst.dev,
420 dst_output);
421 if (err > 0)
422 err = net_xmit_errno(err);
423 if (err)
424 goto error;
425out:
426 return 0;
427
428error_free:
429 kfree_skb(skb);
430error:
431 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
432 if (err == -ENOBUFS && !inet->recverr)
433 err = 0;
434 return err;
435}
436
437static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4)
438{
439 int err;
440
441 if (fl4->flowi4_proto != IPPROTO_ICMP)
442 return 0;
443
444
445 rfv->hlen = 2;
446
447 err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen);
448 if (err)
449 return err;
450
451 fl4->fl4_icmp_type = rfv->hdr.icmph.type;
452 fl4->fl4_icmp_code = rfv->hdr.icmph.code;
453
454 return 0;
455}
456
457static int raw_getfrag(void *from, char *to, int offset, int len, int odd,
458 struct sk_buff *skb)
459{
460 struct raw_frag_vec *rfv = from;
461
462 if (offset < rfv->hlen) {
463 int copy = min(rfv->hlen - offset, len);
464
465 if (skb->ip_summed == CHECKSUM_PARTIAL)
466 memcpy(to, rfv->hdr.c + offset, copy);
467 else
468 skb->csum = csum_block_add(
469 skb->csum,
470 csum_partial_copy_nocheck(rfv->hdr.c + offset,
471 to, copy, 0),
472 odd);
473
474 odd = 0;
475 offset += copy;
476 to += copy;
477 len -= copy;
478
479 if (!len)
480 return 0;
481 }
482
483 offset -= rfv->hlen;
484
485 return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
486}
487
488static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
489{
490 struct inet_sock *inet = inet_sk(sk);
491 struct net *net = sock_net(sk);
492 struct ipcm_cookie ipc;
493 struct rtable *rt = NULL;
494 struct flowi4 fl4;
495 int free = 0;
496 __be32 daddr;
497 __be32 saddr;
498 u8 tos;
499 int err;
500 struct ip_options_data opt_copy;
501 struct raw_frag_vec rfv;
502
503 err = -EMSGSIZE;
504 if (len > 0xFFFF)
505 goto out;
506
507
508
509
510
511 err = -EOPNOTSUPP;
512 if (msg->msg_flags & MSG_OOB)
513 goto out;
514
515
516
517
518
519 if (msg->msg_namelen) {
520 DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name);
521 err = -EINVAL;
522 if (msg->msg_namelen < sizeof(*usin))
523 goto out;
524 if (usin->sin_family != AF_INET) {
525 pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n",
526 __func__, current->comm);
527 err = -EAFNOSUPPORT;
528 if (usin->sin_family)
529 goto out;
530 }
531 daddr = usin->sin_addr.s_addr;
532
533
534
535
536 } else {
537 err = -EDESTADDRREQ;
538 if (sk->sk_state != TCP_ESTABLISHED)
539 goto out;
540 daddr = inet->inet_daddr;
541 }
542
543 ipc.sockc.tsflags = sk->sk_tsflags;
544 ipc.addr = inet->inet_saddr;
545 ipc.opt = NULL;
546 ipc.tx_flags = 0;
547 ipc.ttl = 0;
548 ipc.tos = -1;
549 ipc.oif = sk->sk_bound_dev_if;
550
551 if (msg->msg_controllen) {
552 err = ip_cmsg_send(sk, msg, &ipc, false);
553 if (unlikely(err)) {
554 kfree(ipc.opt);
555 goto out;
556 }
557 if (ipc.opt)
558 free = 1;
559 }
560
561 saddr = ipc.addr;
562 ipc.addr = daddr;
563
564 if (!ipc.opt) {
565 struct ip_options_rcu *inet_opt;
566
567 rcu_read_lock();
568 inet_opt = rcu_dereference(inet->inet_opt);
569 if (inet_opt) {
570 memcpy(&opt_copy, inet_opt,
571 sizeof(*inet_opt) + inet_opt->opt.optlen);
572 ipc.opt = &opt_copy.opt;
573 }
574 rcu_read_unlock();
575 }
576
577 if (ipc.opt) {
578 err = -EINVAL;
579
580
581
582 if (inet->hdrincl)
583 goto done;
584 if (ipc.opt->opt.srr) {
585 if (!daddr)
586 goto done;
587 daddr = ipc.opt->opt.faddr;
588 }
589 }
590 tos = get_rtconn_flags(&ipc, sk);
591 if (msg->msg_flags & MSG_DONTROUTE)
592 tos |= RTO_ONLINK;
593
594 if (ipv4_is_multicast(daddr)) {
595 if (!ipc.oif)
596 ipc.oif = inet->mc_index;
597 if (!saddr)
598 saddr = inet->mc_addr;
599 } else if (!ipc.oif)
600 ipc.oif = inet->uc_index;
601
602 flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
603 RT_SCOPE_UNIVERSE,
604 inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
605 inet_sk_flowi_flags(sk) |
606 (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
607 daddr, saddr, 0, 0);
608
609 if (!inet->hdrincl) {
610 rfv.msg = msg;
611 rfv.hlen = 0;
612
613 err = raw_probe_proto_opt(&rfv, &fl4);
614 if (err)
615 goto done;
616 }
617
618 security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
619 rt = ip_route_output_flow(net, &fl4, sk);
620 if (IS_ERR(rt)) {
621 err = PTR_ERR(rt);
622 rt = NULL;
623 goto done;
624 }
625
626 err = -EACCES;
627 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
628 goto done;
629
630 if (msg->msg_flags & MSG_CONFIRM)
631 goto do_confirm;
632back_from_confirm:
633
634 if (inet->hdrincl)
635 err = raw_send_hdrinc(sk, &fl4, msg, len,
636 &rt, msg->msg_flags, &ipc.sockc);
637
638 else {
639 sock_tx_timestamp(sk, ipc.sockc.tsflags, &ipc.tx_flags);
640
641 if (!ipc.addr)
642 ipc.addr = fl4.daddr;
643 lock_sock(sk);
644 err = ip_append_data(sk, &fl4, raw_getfrag,
645 &rfv, len, 0,
646 &ipc, &rt, msg->msg_flags);
647 if (err)
648 ip_flush_pending_frames(sk);
649 else if (!(msg->msg_flags & MSG_MORE)) {
650 err = ip_push_pending_frames(sk, &fl4);
651 if (err == -ENOBUFS && !inet->recverr)
652 err = 0;
653 }
654 release_sock(sk);
655 }
656done:
657 if (free)
658 kfree(ipc.opt);
659 ip_rt_put(rt);
660
661out:
662 if (err < 0)
663 return err;
664 return len;
665
666do_confirm:
667 dst_confirm(&rt->dst);
668 if (!(msg->msg_flags & MSG_PROBE) || len)
669 goto back_from_confirm;
670 err = 0;
671 goto done;
672}
673
674static void raw_close(struct sock *sk, long timeout)
675{
676
677
678
679 ip_ra_control(sk, 0, NULL);
680
681 sk_common_release(sk);
682}
683
684static void raw_destroy(struct sock *sk)
685{
686 lock_sock(sk);
687 ip_flush_pending_frames(sk);
688 release_sock(sk);
689}
690
691
692static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
693{
694 struct inet_sock *inet = inet_sk(sk);
695 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
696 int ret = -EINVAL;
697 int chk_addr_ret;
698
699 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
700 goto out;
701 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
702 ret = -EADDRNOTAVAIL;
703 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
704 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
705 goto out;
706 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
707 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
708 inet->inet_saddr = 0;
709 sk_dst_reset(sk);
710 ret = 0;
711out: return ret;
712}
713
714
715
716
717
718
719static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
720 int noblock, int flags, int *addr_len)
721{
722 struct inet_sock *inet = inet_sk(sk);
723 size_t copied = 0;
724 int err = -EOPNOTSUPP;
725 DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name);
726 struct sk_buff *skb;
727
728 if (flags & MSG_OOB)
729 goto out;
730
731 if (flags & MSG_ERRQUEUE) {
732 err = ip_recv_error(sk, msg, len, addr_len);
733 goto out;
734 }
735
736 skb = skb_recv_datagram(sk, flags, noblock, &err);
737 if (!skb)
738 goto out;
739
740 copied = skb->len;
741 if (len < copied) {
742 msg->msg_flags |= MSG_TRUNC;
743 copied = len;
744 }
745
746 err = skb_copy_datagram_msg(skb, 0, msg, copied);
747 if (err)
748 goto done;
749
750 sock_recv_ts_and_drops(msg, sk, skb);
751
752
753 if (sin) {
754 sin->sin_family = AF_INET;
755 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
756 sin->sin_port = 0;
757 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
758 *addr_len = sizeof(*sin);
759 }
760 if (inet->cmsg_flags)
761 ip_cmsg_recv(msg, skb);
762 if (flags & MSG_TRUNC)
763 copied = skb->len;
764done:
765 skb_free_datagram(sk, skb);
766out:
767 if (err)
768 return err;
769 return copied;
770}
771
772static int raw_init(struct sock *sk)
773{
774 struct raw_sock *rp = raw_sk(sk);
775
776 if (inet_sk(sk)->inet_num == IPPROTO_ICMP)
777 memset(&rp->filter, 0, sizeof(rp->filter));
778 return 0;
779}
780
781static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
782{
783 if (optlen > sizeof(struct icmp_filter))
784 optlen = sizeof(struct icmp_filter);
785 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
786 return -EFAULT;
787 return 0;
788}
789
790static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
791{
792 int len, ret = -EFAULT;
793
794 if (get_user(len, optlen))
795 goto out;
796 ret = -EINVAL;
797 if (len < 0)
798 goto out;
799 if (len > sizeof(struct icmp_filter))
800 len = sizeof(struct icmp_filter);
801 ret = -EFAULT;
802 if (put_user(len, optlen) ||
803 copy_to_user(optval, &raw_sk(sk)->filter, len))
804 goto out;
805 ret = 0;
806out: return ret;
807}
808
809static int do_raw_setsockopt(struct sock *sk, int level, int optname,
810 char __user *optval, unsigned int optlen)
811{
812 if (optname == ICMP_FILTER) {
813 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
814 return -EOPNOTSUPP;
815 else
816 return raw_seticmpfilter(sk, optval, optlen);
817 }
818 return -ENOPROTOOPT;
819}
820
821static int raw_setsockopt(struct sock *sk, int level, int optname,
822 char __user *optval, unsigned int optlen)
823{
824 if (level != SOL_RAW)
825 return ip_setsockopt(sk, level, optname, optval, optlen);
826 return do_raw_setsockopt(sk, level, optname, optval, optlen);
827}
828
829#ifdef CONFIG_COMPAT
830static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
831 char __user *optval, unsigned int optlen)
832{
833 if (level != SOL_RAW)
834 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
835 return do_raw_setsockopt(sk, level, optname, optval, optlen);
836}
837#endif
838
839static int do_raw_getsockopt(struct sock *sk, int level, int optname,
840 char __user *optval, int __user *optlen)
841{
842 if (optname == ICMP_FILTER) {
843 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
844 return -EOPNOTSUPP;
845 else
846 return raw_geticmpfilter(sk, optval, optlen);
847 }
848 return -ENOPROTOOPT;
849}
850
851static int raw_getsockopt(struct sock *sk, int level, int optname,
852 char __user *optval, int __user *optlen)
853{
854 if (level != SOL_RAW)
855 return ip_getsockopt(sk, level, optname, optval, optlen);
856 return do_raw_getsockopt(sk, level, optname, optval, optlen);
857}
858
859#ifdef CONFIG_COMPAT
860static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
861 char __user *optval, int __user *optlen)
862{
863 if (level != SOL_RAW)
864 return compat_ip_getsockopt(sk, level, optname, optval, optlen);
865 return do_raw_getsockopt(sk, level, optname, optval, optlen);
866}
867#endif
868
869static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
870{
871 switch (cmd) {
872 case SIOCOUTQ: {
873 int amount = sk_wmem_alloc_get(sk);
874
875 return put_user(amount, (int __user *)arg);
876 }
877 case SIOCINQ: {
878 struct sk_buff *skb;
879 int amount = 0;
880
881 spin_lock_bh(&sk->sk_receive_queue.lock);
882 skb = skb_peek(&sk->sk_receive_queue);
883 if (skb)
884 amount = skb->len;
885 spin_unlock_bh(&sk->sk_receive_queue.lock);
886 return put_user(amount, (int __user *)arg);
887 }
888
889 default:
890#ifdef CONFIG_IP_MROUTE
891 return ipmr_ioctl(sk, cmd, (void __user *)arg);
892#else
893 return -ENOIOCTLCMD;
894#endif
895 }
896}
897
898#ifdef CONFIG_COMPAT
899static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
900{
901 switch (cmd) {
902 case SIOCOUTQ:
903 case SIOCINQ:
904 return -ENOIOCTLCMD;
905 default:
906#ifdef CONFIG_IP_MROUTE
907 return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
908#else
909 return -ENOIOCTLCMD;
910#endif
911 }
912}
913#endif
914
915struct proto raw_prot = {
916 .name = "RAW",
917 .owner = THIS_MODULE,
918 .close = raw_close,
919 .destroy = raw_destroy,
920 .connect = ip4_datagram_connect,
921 .disconnect = __udp_disconnect,
922 .ioctl = raw_ioctl,
923 .init = raw_init,
924 .setsockopt = raw_setsockopt,
925 .getsockopt = raw_getsockopt,
926 .sendmsg = raw_sendmsg,
927 .recvmsg = raw_recvmsg,
928 .bind = raw_bind,
929 .backlog_rcv = raw_rcv_skb,
930 .release_cb = ip4_datagram_release_cb,
931 .hash = raw_hash_sk,
932 .unhash = raw_unhash_sk,
933 .obj_size = sizeof(struct raw_sock),
934 .h.raw_hash = &raw_v4_hashinfo,
935#ifdef CONFIG_COMPAT
936 .compat_setsockopt = compat_raw_setsockopt,
937 .compat_getsockopt = compat_raw_getsockopt,
938 .compat_ioctl = compat_raw_ioctl,
939#endif
940};
941
942#ifdef CONFIG_PROC_FS
943static struct sock *raw_get_first(struct seq_file *seq)
944{
945 struct sock *sk;
946 struct raw_iter_state *state = raw_seq_private(seq);
947
948 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
949 ++state->bucket) {
950 sk_for_each(sk, &state->h->ht[state->bucket])
951 if (sock_net(sk) == seq_file_net(seq))
952 goto found;
953 }
954 sk = NULL;
955found:
956 return sk;
957}
958
959static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
960{
961 struct raw_iter_state *state = raw_seq_private(seq);
962
963 do {
964 sk = sk_next(sk);
965try_again:
966 ;
967 } while (sk && sock_net(sk) != seq_file_net(seq));
968
969 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
970 sk = sk_head(&state->h->ht[state->bucket]);
971 goto try_again;
972 }
973 return sk;
974}
975
976static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
977{
978 struct sock *sk = raw_get_first(seq);
979
980 if (sk)
981 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
982 --pos;
983 return pos ? NULL : sk;
984}
985
986void *raw_seq_start(struct seq_file *seq, loff_t *pos)
987{
988 struct raw_iter_state *state = raw_seq_private(seq);
989
990 read_lock(&state->h->lock);
991 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
992}
993EXPORT_SYMBOL_GPL(raw_seq_start);
994
995void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
996{
997 struct sock *sk;
998
999 if (v == SEQ_START_TOKEN)
1000 sk = raw_get_first(seq);
1001 else
1002 sk = raw_get_next(seq, v);
1003 ++*pos;
1004 return sk;
1005}
1006EXPORT_SYMBOL_GPL(raw_seq_next);
1007
1008void raw_seq_stop(struct seq_file *seq, void *v)
1009{
1010 struct raw_iter_state *state = raw_seq_private(seq);
1011
1012 read_unlock(&state->h->lock);
1013}
1014EXPORT_SYMBOL_GPL(raw_seq_stop);
1015
1016static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
1017{
1018 struct inet_sock *inet = inet_sk(sp);
1019 __be32 dest = inet->inet_daddr,
1020 src = inet->inet_rcv_saddr;
1021 __u16 destp = 0,
1022 srcp = inet->inet_num;
1023
1024 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
1025 " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n",
1026 i, src, srcp, dest, destp, sp->sk_state,
1027 sk_wmem_alloc_get(sp),
1028 sk_rmem_alloc_get(sp),
1029 0, 0L, 0,
1030 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
1031 0, sock_i_ino(sp),
1032 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
1033}
1034
1035static int raw_seq_show(struct seq_file *seq, void *v)
1036{
1037 if (v == SEQ_START_TOKEN)
1038 seq_printf(seq, " sl local_address rem_address st tx_queue "
1039 "rx_queue tr tm->when retrnsmt uid timeout "
1040 "inode ref pointer drops\n");
1041 else
1042 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
1043 return 0;
1044}
1045
1046static const struct seq_operations raw_seq_ops = {
1047 .start = raw_seq_start,
1048 .next = raw_seq_next,
1049 .stop = raw_seq_stop,
1050 .show = raw_seq_show,
1051};
1052
1053int raw_seq_open(struct inode *ino, struct file *file,
1054 struct raw_hashinfo *h, const struct seq_operations *ops)
1055{
1056 int err;
1057 struct raw_iter_state *i;
1058
1059 err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state));
1060 if (err < 0)
1061 return err;
1062
1063 i = raw_seq_private((struct seq_file *)file->private_data);
1064 i->h = h;
1065 return 0;
1066}
1067EXPORT_SYMBOL_GPL(raw_seq_open);
1068
1069static int raw_v4_seq_open(struct inode *inode, struct file *file)
1070{
1071 return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops);
1072}
1073
1074static const struct file_operations raw_seq_fops = {
1075 .owner = THIS_MODULE,
1076 .open = raw_v4_seq_open,
1077 .read = seq_read,
1078 .llseek = seq_lseek,
1079 .release = seq_release_net,
1080};
1081
1082static __net_init int raw_init_net(struct net *net)
1083{
1084 if (!proc_create("raw", S_IRUGO, net->proc_net, &raw_seq_fops))
1085 return -ENOMEM;
1086
1087 return 0;
1088}
1089
1090static __net_exit void raw_exit_net(struct net *net)
1091{
1092 remove_proc_entry("raw", net->proc_net);
1093}
1094
1095static __net_initdata struct pernet_operations raw_net_ops = {
1096 .init = raw_init_net,
1097 .exit = raw_exit_net,
1098};
1099
1100int __init raw_proc_init(void)
1101{
1102 return register_pernet_subsys(&raw_net_ops);
1103}
1104
1105void __init raw_proc_exit(void)
1106{
1107 unregister_pernet_subsys(&raw_net_ops);
1108}
1109#endif
1110