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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/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;
122 }
123 sk = NULL;
124found:
125 return sk;
126}
127
128
129
130
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
149 return 0;
150}
151
152
153
154
155
156
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
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
202
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
227
228
229
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
301
302 ipv4_pktinfo_prepare(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
377
378
379
380
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
437 if (iov->iov_base && iov->iov_len < 1)
438 break;
439
440 if (!type) {
441 type = iov->iov_base;
442
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
485
486
487 err = -EOPNOTSUPP;
488 if (msg->msg_flags & MSG_OOB)
489 goto out;
490
491
492
493
494
495 if (msg->msg_namelen) {
496 struct sockaddr_in *usin = (struct sockaddr_in *)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
509
510
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.oif = sk->sk_bound_dev_if;
523
524 if (msg->msg_controllen) {
525 err = ip_cmsg_send(sock_net(sk), msg, &ipc);
526 if (err)
527 goto out;
528 if (ipc.opt)
529 free = 1;
530 }
531
532 saddr = ipc.addr;
533 ipc.addr = daddr;
534
535 if (!ipc.opt) {
536 struct ip_options_rcu *inet_opt;
537
538 rcu_read_lock();
539 inet_opt = rcu_dereference(inet->inet_opt);
540 if (inet_opt) {
541 memcpy(&opt_copy, inet_opt,
542 sizeof(*inet_opt) + inet_opt->opt.optlen);
543 ipc.opt = &opt_copy.opt;
544 }
545 rcu_read_unlock();
546 }
547
548 if (ipc.opt) {
549 err = -EINVAL;
550
551
552
553 if (inet->hdrincl)
554 goto done;
555 if (ipc.opt->opt.srr) {
556 if (!daddr)
557 goto done;
558 daddr = ipc.opt->opt.faddr;
559 }
560 }
561 tos = RT_CONN_FLAGS(sk);
562 if (msg->msg_flags & MSG_DONTROUTE)
563 tos |= RTO_ONLINK;
564
565 if (ipv4_is_multicast(daddr)) {
566 if (!ipc.oif)
567 ipc.oif = inet->mc_index;
568 if (!saddr)
569 saddr = inet->mc_addr;
570 } else if (!ipc.oif)
571 ipc.oif = inet->uc_index;
572
573 flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
574 RT_SCOPE_UNIVERSE,
575 inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
576 inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP |
577 (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
578 daddr, saddr, 0, 0);
579
580 if (!inet->hdrincl) {
581 err = raw_probe_proto_opt(&fl4, msg);
582 if (err)
583 goto done;
584 }
585
586 security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
587 rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
588 if (IS_ERR(rt)) {
589 err = PTR_ERR(rt);
590 rt = NULL;
591 goto done;
592 }
593
594 err = -EACCES;
595 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
596 goto done;
597
598 if (msg->msg_flags & MSG_CONFIRM)
599 goto do_confirm;
600back_from_confirm:
601
602 if (inet->hdrincl)
603 err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len,
604 &rt, msg->msg_flags);
605
606 else {
607 if (!ipc.addr)
608 ipc.addr = fl4.daddr;
609 lock_sock(sk);
610 err = ip_append_data(sk, &fl4, ip_generic_getfrag,
611 msg->msg_iov, len, 0,
612 &ipc, &rt, msg->msg_flags);
613 if (err)
614 ip_flush_pending_frames(sk);
615 else if (!(msg->msg_flags & MSG_MORE)) {
616 err = ip_push_pending_frames(sk, &fl4);
617 if (err == -ENOBUFS && !inet->recverr)
618 err = 0;
619 }
620 release_sock(sk);
621 }
622done:
623 if (free)
624 kfree(ipc.opt);
625 ip_rt_put(rt);
626
627out:
628 if (err < 0)
629 return err;
630 return len;
631
632do_confirm:
633 dst_confirm(&rt->dst);
634 if (!(msg->msg_flags & MSG_PROBE) || len)
635 goto back_from_confirm;
636 err = 0;
637 goto done;
638}
639
640static void raw_close(struct sock *sk, long timeout)
641{
642
643
644
645 ip_ra_control(sk, 0, NULL);
646
647 sk_common_release(sk);
648}
649
650static void raw_destroy(struct sock *sk)
651{
652 lock_sock(sk);
653 ip_flush_pending_frames(sk);
654 release_sock(sk);
655}
656
657
658static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
659{
660 struct inet_sock *inet = inet_sk(sk);
661 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
662 int ret = -EINVAL;
663 int chk_addr_ret;
664
665 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
666 goto out;
667 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
668 ret = -EADDRNOTAVAIL;
669 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
670 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
671 goto out;
672 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
673 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
674 inet->inet_saddr = 0;
675 sk_dst_reset(sk);
676 ret = 0;
677out: return ret;
678}
679
680
681
682
683
684
685static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
686 size_t len, int noblock, int flags, int *addr_len)
687{
688 struct inet_sock *inet = inet_sk(sk);
689 size_t copied = 0;
690 int err = -EOPNOTSUPP;
691 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
692 struct sk_buff *skb;
693
694 if (flags & MSG_OOB)
695 goto out;
696
697 if (addr_len)
698 *addr_len = sizeof(*sin);
699
700 if (flags & MSG_ERRQUEUE) {
701 err = ip_recv_error(sk, msg, len);
702 goto out;
703 }
704
705 skb = skb_recv_datagram(sk, flags, noblock, &err);
706 if (!skb)
707 goto out;
708
709 copied = skb->len;
710 if (len < copied) {
711 msg->msg_flags |= MSG_TRUNC;
712 copied = len;
713 }
714
715 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
716 if (err)
717 goto done;
718
719 sock_recv_ts_and_drops(msg, sk, skb);
720
721
722 if (sin) {
723 sin->sin_family = AF_INET;
724 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
725 sin->sin_port = 0;
726 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
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
1078
