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40#include <linux/types.h>
41#include <asm/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/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 <net/net_namespace.h>
61#include <net/dst.h>
62#include <net/sock.h>
63#include <linux/gfp.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
81static struct raw_hashinfo raw_v4_hashinfo = {
82 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
83};
84
85void raw_hash_sk(struct sock *sk)
86{
87 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
88 struct hlist_head *head;
89
90 head = &h->ht[inet_sk(sk)->num & (RAW_HTABLE_SIZE - 1)];
91
92 write_lock_bh(&h->lock);
93 sk_add_node(sk, head);
94 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
95 write_unlock_bh(&h->lock);
96}
97EXPORT_SYMBOL_GPL(raw_hash_sk);
98
99void raw_unhash_sk(struct sock *sk)
100{
101 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
102
103 write_lock_bh(&h->lock);
104 if (sk_del_node_init(sk))
105 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
106 write_unlock_bh(&h->lock);
107}
108EXPORT_SYMBOL_GPL(raw_unhash_sk);
109
110static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk,
111 unsigned short num, __be32 raddr, __be32 laddr, int dif)
112{
113 struct hlist_node *node;
114
115 sk_for_each_from(sk, node) {
116 struct inet_sock *inet = inet_sk(sk);
117
118 if (net_eq(sock_net(sk), net) && inet->num == num &&
119 !(inet->daddr && inet->daddr != raddr) &&
120 !(inet->rcv_saddr && inet->rcv_saddr != laddr) &&
121 !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
122 goto found;
123 }
124 sk = NULL;
125found:
126 return sk;
127}
128
129
130
131
132
133static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb)
134{
135 int type;
136
137 if (!pskb_may_pull(skb, sizeof(struct icmphdr)))
138 return 1;
139
140 type = icmp_hdr(skb)->type;
141 if (type < 32) {
142 __u32 data = raw_sk(sk)->filter.data;
143
144 return ((1 << type) & data) != 0;
145 }
146
147
148 return 0;
149}
150
151
152
153
154
155
156
157static int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
158{
159 struct sock *sk;
160 struct hlist_head *head;
161 int delivered = 0;
162 struct net *net;
163
164 read_lock(&raw_v4_hashinfo.lock);
165 head = &raw_v4_hashinfo.ht[hash];
166 if (hlist_empty(head))
167 goto out;
168
169 net = dev_net(skb->dev);
170 sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol,
171 iph->saddr, iph->daddr,
172 skb->dev->ifindex);
173
174 while (sk) {
175 delivered = 1;
176 if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) {
177 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
178
179
180 if (clone)
181 raw_rcv(sk, clone);
182 }
183 sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol,
184 iph->saddr, iph->daddr,
185 skb->dev->ifindex);
186 }
187out:
188 read_unlock(&raw_v4_hashinfo.lock);
189 return delivered;
190}
191
192int raw_local_deliver(struct sk_buff *skb, int protocol)
193{
194 int hash;
195 struct sock *raw_sk;
196
197 hash = protocol & (RAW_HTABLE_SIZE - 1);
198 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
199
200
201
202
203 if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash))
204 raw_sk = NULL;
205
206 return raw_sk != NULL;
207
208}
209
210static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
211{
212 struct inet_sock *inet = inet_sk(sk);
213 const int type = icmp_hdr(skb)->type;
214 const int code = icmp_hdr(skb)->code;
215 int err = 0;
216 int harderr = 0;
217
218
219
220
221
222
223 if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED)
224 return;
225
226 switch (type) {
227 default:
228 case ICMP_TIME_EXCEEDED:
229 err = EHOSTUNREACH;
230 break;
231 case ICMP_SOURCE_QUENCH:
232 return;
233 case ICMP_PARAMETERPROB:
234 err = EPROTO;
235 harderr = 1;
236 break;
237 case ICMP_DEST_UNREACH:
238 err = EHOSTUNREACH;
239 if (code > NR_ICMP_UNREACH)
240 break;
241 err = icmp_err_convert[code].errno;
242 harderr = icmp_err_convert[code].fatal;
243 if (code == ICMP_FRAG_NEEDED) {
244 harderr = inet->pmtudisc != IP_PMTUDISC_DONT;
245 err = EMSGSIZE;
246 }
247 }
248
249 if (inet->recverr) {
250 struct iphdr *iph = (struct iphdr*)skb->data;
251 u8 *payload = skb->data + (iph->ihl << 2);
252
253 if (inet->hdrincl)
254 payload = skb->data;
255 ip_icmp_error(sk, skb, err, 0, info, payload);
256 }
257
258 if (inet->recverr || harderr) {
259 sk->sk_err = err;
260 sk->sk_error_report(sk);
261 }
262}
263
264void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
265{
266 int hash;
267 struct sock *raw_sk;
268 struct iphdr *iph;
269 struct net *net;
270
271 hash = protocol & (RAW_HTABLE_SIZE - 1);
272
273 read_lock(&raw_v4_hashinfo.lock);
274 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
275 if (raw_sk != NULL) {
276 iph = (struct iphdr *)skb->data;
277 net = dev_net(skb->dev);
278
279 while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
280 iph->daddr, iph->saddr,
281 skb->dev->ifindex)) != NULL) {
282 raw_err(raw_sk, skb, info);
283 raw_sk = sk_next(raw_sk);
284 iph = (struct iphdr *)skb->data;
285 }
286 }
287 read_unlock(&raw_v4_hashinfo.lock);
288}
289
290static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb)
291{
292
293
294 if (sock_queue_rcv_skb(sk, skb) < 0) {
295 atomic_inc(&sk->sk_drops);
296 kfree_skb(skb);
297 return NET_RX_DROP;
298 }
299
300 return NET_RX_SUCCESS;
301}
302
303int raw_rcv(struct sock *sk, struct sk_buff *skb)
304{
305 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
306 atomic_inc(&sk->sk_drops);
307 kfree_skb(skb);
308 return NET_RX_DROP;
309 }
310 nf_reset(skb);
311
312 skb_push(skb, skb->data - skb_network_header(skb));
313
314 raw_rcv_skb(sk, skb);
315 return 0;
316}
317
318static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
319 struct rtable *rt,
320 unsigned int flags)
321{
322 struct inet_sock *inet = inet_sk(sk);
323 struct net *net = sock_net(sk);
324 struct iphdr *iph;
325 struct sk_buff *skb;
326 unsigned int iphlen;
327 int err;
328
329 if (length > rt->u.dst.dev->mtu) {
330 ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->dport,
331 rt->u.dst.dev->mtu);
332 return -EMSGSIZE;
333 }
334 if (flags&MSG_PROBE)
335 goto out;
336
337 skb = sock_alloc_send_skb(sk,
338 length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15,
339 flags & MSG_DONTWAIT, &err);
340 if (skb == NULL)
341 goto error;
342 skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
343
344 skb->priority = sk->sk_priority;
345 skb->mark = sk->sk_mark;
346 skb->dst = dst_clone(&rt->u.dst);
347
348 skb_reset_network_header(skb);
349 iph = ip_hdr(skb);
350 skb_put(skb, length);
351
352 skb->ip_summed = CHECKSUM_NONE;
353
354 skb->transport_header = skb->network_header;
355 err = memcpy_fromiovecend((void *)iph, from, 0, length);
356 if (err)
357 goto error_fault;
358
359
360 iphlen = iph->ihl * 4;
361 if (iphlen >= sizeof(*iph) && iphlen <= length) {
362 if (!iph->saddr)
363 iph->saddr = rt->rt_src;
364 iph->check = 0;
365 iph->tot_len = htons(length);
366 if (!iph->id)
367 ip_select_ident(iph, &rt->u.dst, NULL);
368
369 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
370 }
371 if (iph->protocol == IPPROTO_ICMP)
372 icmp_out_count(net, ((struct icmphdr *)
373 skb_transport_header(skb))->type);
374
375 err = NF_HOOK(PF_INET, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
376 dst_output);
377 if (err > 0)
378 err = inet->recverr ? net_xmit_errno(err) : 0;
379 if (err)
380 goto error;
381out:
382 return 0;
383
384error_fault:
385 err = -EFAULT;
386 kfree_skb(skb);
387error:
388 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
389 return err;
390}
391
392static int raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
393{
394 struct iovec *iov;
395 u8 __user *type = NULL;
396 u8 __user *code = NULL;
397 int probed = 0;
398 unsigned int i;
399
400 if (!msg->msg_iov)
401 return 0;
402
403 for (i = 0; i < msg->msg_iovlen; i++) {
404 iov = &msg->msg_iov[i];
405 if (!iov)
406 continue;
407
408 switch (fl->proto) {
409 case IPPROTO_ICMP:
410
411 if (iov->iov_base && iov->iov_len < 1)
412 break;
413
414 if (!type) {
415 type = iov->iov_base;
416
417 if (iov->iov_len > 1)
418 code = type + 1;
419 } else if (!code)
420 code = iov->iov_base;
421
422 if (type && code) {
423 if (get_user(fl->fl_icmp_type, type) ||
424 get_user(fl->fl_icmp_code, code))
425 return -EFAULT;
426 probed = 1;
427 }
428 break;
429 default:
430 probed = 1;
431 break;
432 }
433 if (probed)
434 break;
435 }
436 return 0;
437}
438
439static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
440 size_t len)
441{
442 struct inet_sock *inet = inet_sk(sk);
443 struct ipcm_cookie ipc;
444 struct rtable *rt = NULL;
445 int free = 0;
446 __be32 daddr;
447 __be32 saddr;
448 u8 tos;
449 int err;
450
451 err = -EMSGSIZE;
452 if (len > 0xFFFF)
453 goto out;
454
455
456
457
458
459 err = -EOPNOTSUPP;
460 if (msg->msg_flags & MSG_OOB)
461 goto out;
462
463
464
465
466
467 if (msg->msg_namelen) {
468 struct sockaddr_in *usin = (struct sockaddr_in*)msg->msg_name;
469 err = -EINVAL;
470 if (msg->msg_namelen < sizeof(*usin))
471 goto out;
472 if (usin->sin_family != AF_INET) {
473 static int complained;
474 if (!complained++)
475 printk(KERN_INFO "%s forgot to set AF_INET in "
476 "raw sendmsg. Fix it!\n",
477 current->comm);
478 err = -EAFNOSUPPORT;
479 if (usin->sin_family)
480 goto out;
481 }
482 daddr = usin->sin_addr.s_addr;
483
484
485
486
487 } else {
488 err = -EDESTADDRREQ;
489 if (sk->sk_state != TCP_ESTABLISHED)
490 goto out;
491 daddr = inet->daddr;
492 }
493
494 ipc.addr = inet->saddr;
495 ipc.opt = NULL;
496 ipc.oif = sk->sk_bound_dev_if;
497
498 if (msg->msg_controllen) {
499 err = ip_cmsg_send(sock_net(sk), msg, &ipc);
500 if (err)
501 goto out;
502 if (ipc.opt)
503 free = 1;
504 }
505
506 saddr = ipc.addr;
507 ipc.addr = daddr;
508
509 if (!ipc.opt)
510 ipc.opt = inet->opt;
511
512 if (ipc.opt) {
513 err = -EINVAL;
514
515
516
517 if (inet->hdrincl)
518 goto done;
519 if (ipc.opt->srr) {
520 if (!daddr)
521 goto done;
522 daddr = ipc.opt->faddr;
523 }
524 }
525 tos = RT_CONN_FLAGS(sk);
526 if (msg->msg_flags & MSG_DONTROUTE)
527 tos |= RTO_ONLINK;
528
529 if (ipv4_is_multicast(daddr)) {
530 if (!ipc.oif)
531 ipc.oif = inet->mc_index;
532 if (!saddr)
533 saddr = inet->mc_addr;
534 }
535
536 {
537 struct flowi fl = { .oif = ipc.oif,
538 .mark = sk->sk_mark,
539 .nl_u = { .ip4_u =
540 { .daddr = daddr,
541 .saddr = saddr,
542 .tos = tos } },
543 .proto = inet->hdrincl ? IPPROTO_RAW :
544 sk->sk_protocol,
545 };
546 if (!inet->hdrincl) {
547 err = raw_probe_proto_opt(&fl, msg);
548 if (err)
549 goto done;
550 }
551
552 security_sk_classify_flow(sk, &fl);
553 err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 1);
554 }
555 if (err)
556 goto done;
557
558 err = -EACCES;
559 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
560 goto done;
561
562 if (msg->msg_flags & MSG_CONFIRM)
563 goto do_confirm;
564back_from_confirm:
565
566 if (inet->hdrincl)
567 err = raw_send_hdrinc(sk, msg->msg_iov, len,
568 rt, msg->msg_flags);
569
570 else {
571 if (!ipc.addr)
572 ipc.addr = rt->rt_dst;
573 lock_sock(sk);
574 err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
575 &ipc, rt, msg->msg_flags);
576 if (err)
577 ip_flush_pending_frames(sk);
578 else if (!(msg->msg_flags & MSG_MORE))
579 err = ip_push_pending_frames(sk);
580 release_sock(sk);
581 }
582done:
583 if (free)
584 kfree(ipc.opt);
585 ip_rt_put(rt);
586
587out:
588 if (err < 0)
589 return err;
590 return len;
591
592do_confirm:
593 dst_confirm(&rt->u.dst);
594 if (!(msg->msg_flags & MSG_PROBE) || len)
595 goto back_from_confirm;
596 err = 0;
597 goto done;
598}
599
600static void raw_close(struct sock *sk, long timeout)
601{
602
603
604
605 ip_ra_control(sk, 0, NULL);
606
607 sk_common_release(sk);
608}
609
610static void raw_destroy(struct sock *sk)
611{
612 lock_sock(sk);
613 ip_flush_pending_frames(sk);
614 release_sock(sk);
615}
616
617
618static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
619{
620 struct inet_sock *inet = inet_sk(sk);
621 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
622 int ret = -EINVAL;
623 int chk_addr_ret;
624
625 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
626 goto out;
627 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
628 ret = -EADDRNOTAVAIL;
629 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
630 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
631 goto out;
632 inet->rcv_saddr = inet->saddr = addr->sin_addr.s_addr;
633 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
634 inet->saddr = 0;
635 sk_dst_reset(sk);
636 ret = 0;
637out: return ret;
638}
639
640
641
642
643
644
645static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
646 size_t len, int noblock, int flags, int *addr_len)
647{
648 struct inet_sock *inet = inet_sk(sk);
649 size_t copied = 0;
650 int err = -EOPNOTSUPP;
651 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
652 struct sk_buff *skb;
653
654 if (flags & MSG_OOB)
655 goto out;
656
657 if (addr_len)
658 *addr_len = sizeof(*sin);
659
660 if (flags & MSG_ERRQUEUE) {
661 err = ip_recv_error(sk, msg, len);
662 goto out;
663 }
664
665 skb = skb_recv_datagram(sk, flags, noblock, &err);
666 if (!skb)
667 goto out;
668
669 copied = skb->len;
670 if (len < copied) {
671 msg->msg_flags |= MSG_TRUNC;
672 copied = len;
673 }
674
675 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
676 if (err)
677 goto done;
678
679 sock_recv_timestamp(msg, sk, skb);
680
681
682 if (sin) {
683 sin->sin_family = AF_INET;
684 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
685 sin->sin_port = 0;
686 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
687 }
688 if (inet->cmsg_flags)
689 ip_cmsg_recv(msg, skb);
690 if (flags & MSG_TRUNC)
691 copied = skb->len;
692done:
693 skb_free_datagram(sk, skb);
694out:
695 if (err)
696 return err;
697 return copied;
698}
699
700static int raw_init(struct sock *sk)
701{
702 struct raw_sock *rp = raw_sk(sk);
703
704 if (inet_sk(sk)->num == IPPROTO_ICMP)
705 memset(&rp->filter, 0, sizeof(rp->filter));
706 return 0;
707}
708
709static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
710{
711 if (optlen > sizeof(struct icmp_filter))
712 optlen = sizeof(struct icmp_filter);
713 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
714 return -EFAULT;
715 return 0;
716}
717
718static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
719{
720 int len, ret = -EFAULT;
721
722 if (get_user(len, optlen))
723 goto out;
724 ret = -EINVAL;
725 if (len < 0)
726 goto out;
727 if (len > sizeof(struct icmp_filter))
728 len = sizeof(struct icmp_filter);
729 ret = -EFAULT;
730 if (put_user(len, optlen) ||
731 copy_to_user(optval, &raw_sk(sk)->filter, len))
732 goto out;
733 ret = 0;
734out: return ret;
735}
736
737static int do_raw_setsockopt(struct sock *sk, int level, int optname,
738 char __user *optval, int optlen)
739{
740 if (optname == ICMP_FILTER) {
741 if (inet_sk(sk)->num != IPPROTO_ICMP)
742 return -EOPNOTSUPP;
743 else
744 return raw_seticmpfilter(sk, optval, optlen);
745 }
746 return -ENOPROTOOPT;
747}
748
749static int raw_setsockopt(struct sock *sk, int level, int optname,
750 char __user *optval, int optlen)
751{
752 if (level != SOL_RAW)
753 return ip_setsockopt(sk, level, optname, optval, optlen);
754 return do_raw_setsockopt(sk, level, optname, optval, optlen);
755}
756
757#ifdef CONFIG_COMPAT
758static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
759 char __user *optval, int optlen)
760{
761 if (level != SOL_RAW)
762 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
763 return do_raw_setsockopt(sk, level, optname, optval, optlen);
764}
765#endif
766
767static int do_raw_getsockopt(struct sock *sk, int level, int optname,
768 char __user *optval, int __user *optlen)
769{
770 if (optname == ICMP_FILTER) {
771 if (inet_sk(sk)->num != IPPROTO_ICMP)
772 return -EOPNOTSUPP;
773 else
774 return raw_geticmpfilter(sk, optval, optlen);
775 }
776 return -ENOPROTOOPT;
777}
778
779static int raw_getsockopt(struct sock *sk, int level, int optname,
780 char __user *optval, int __user *optlen)
781{
782 if (level != SOL_RAW)
783 return ip_getsockopt(sk, level, optname, optval, optlen);
784 return do_raw_getsockopt(sk, level, optname, optval, optlen);
785}
786
787#ifdef CONFIG_COMPAT
788static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
789 char __user *optval, int __user *optlen)
790{
791 if (level != SOL_RAW)
792 return compat_ip_getsockopt(sk, level, optname, optval, optlen);
793 return do_raw_getsockopt(sk, level, optname, optval, optlen);
794}
795#endif
796
797static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
798{
799 switch (cmd) {
800 case SIOCOUTQ: {
801 int amount = atomic_read(&sk->sk_wmem_alloc);
802 return put_user(amount, (int __user *)arg);
803 }
804 case SIOCINQ: {
805 struct sk_buff *skb;
806 int amount = 0;
807
808 spin_lock_bh(&sk->sk_receive_queue.lock);
809 skb = skb_peek(&sk->sk_receive_queue);
810 if (skb != NULL)
811 amount = skb->len;
812 spin_unlock_bh(&sk->sk_receive_queue.lock);
813 return put_user(amount, (int __user *)arg);
814 }
815
816 default:
817#ifdef CONFIG_IP_MROUTE
818 return ipmr_ioctl(sk, cmd, (void __user *)arg);
819#else
820 return -ENOIOCTLCMD;
821#endif
822 }
823}
824
825struct proto raw_prot = {
826 .name = "RAW",
827 .owner = THIS_MODULE,
828 .close = raw_close,
829 .destroy = raw_destroy,
830 .connect = ip4_datagram_connect,
831 .disconnect = udp_disconnect,
832 .ioctl = raw_ioctl,
833 .init = raw_init,
834 .setsockopt = raw_setsockopt,
835 .getsockopt = raw_getsockopt,
836 .sendmsg = raw_sendmsg,
837 .recvmsg = raw_recvmsg,
838 .bind = raw_bind,
839 .backlog_rcv = raw_rcv_skb,
840 .hash = raw_hash_sk,
841 .unhash = raw_unhash_sk,
842 .obj_size = sizeof(struct raw_sock),
843 .h.raw_hash = &raw_v4_hashinfo,
844#ifdef CONFIG_COMPAT
845 .compat_setsockopt = compat_raw_setsockopt,
846 .compat_getsockopt = compat_raw_getsockopt,
847#endif
848};
849
850#ifdef CONFIG_PROC_FS
851static struct sock *raw_get_first(struct seq_file *seq)
852{
853 struct sock *sk;
854 struct raw_iter_state* state = raw_seq_private(seq);
855
856 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
857 ++state->bucket) {
858 struct hlist_node *node;
859
860 sk_for_each(sk, node, &state->h->ht[state->bucket])
861 if (sock_net(sk) == seq_file_net(seq))
862 goto found;
863 }
864 sk = NULL;
865found:
866 return sk;
867}
868
869static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
870{
871 struct raw_iter_state* state = raw_seq_private(seq);
872
873 do {
874 sk = sk_next(sk);
875try_again:
876 ;
877 } while (sk && sock_net(sk) != seq_file_net(seq));
878
879 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
880 sk = sk_head(&state->h->ht[state->bucket]);
881 goto try_again;
882 }
883 return sk;
884}
885
886static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
887{
888 struct sock *sk = raw_get_first(seq);
889
890 if (sk)
891 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
892 --pos;
893 return pos ? NULL : sk;
894}
895
896void *raw_seq_start(struct seq_file *seq, loff_t *pos)
897{
898 struct raw_iter_state *state = raw_seq_private(seq);
899
900 read_lock(&state->h->lock);
901 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
902}
903EXPORT_SYMBOL_GPL(raw_seq_start);
904
905void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
906{
907 struct sock *sk;
908
909 if (v == SEQ_START_TOKEN)
910 sk = raw_get_first(seq);
911 else
912 sk = raw_get_next(seq, v);
913 ++*pos;
914 return sk;
915}
916EXPORT_SYMBOL_GPL(raw_seq_next);
917
918void raw_seq_stop(struct seq_file *seq, void *v)
919{
920 struct raw_iter_state *state = raw_seq_private(seq);
921
922 read_unlock(&state->h->lock);
923}
924EXPORT_SYMBOL_GPL(raw_seq_stop);
925
926static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
927{
928 struct inet_sock *inet = inet_sk(sp);
929 __be32 dest = inet->daddr,
930 src = inet->rcv_saddr;
931 __u16 destp = 0,
932 srcp = inet->num;
933
934 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
935 " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
936 i, src, srcp, dest, destp, sp->sk_state,
937 atomic_read(&sp->sk_wmem_alloc),
938 atomic_read(&sp->sk_rmem_alloc),
939 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
940 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
941}
942
943static int raw_seq_show(struct seq_file *seq, void *v)
944{
945 if (v == SEQ_START_TOKEN)
946 seq_printf(seq, " sl local_address rem_address st tx_queue "
947 "rx_queue tr tm->when retrnsmt uid timeout "
948 "inode ref pointer drops\n");
949 else
950 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
951 return 0;
952}
953
954static const struct seq_operations raw_seq_ops = {
955 .start = raw_seq_start,
956 .next = raw_seq_next,
957 .stop = raw_seq_stop,
958 .show = raw_seq_show,
959};
960
961int raw_seq_open(struct inode *ino, struct file *file,
962 struct raw_hashinfo *h, const struct seq_operations *ops)
963{
964 int err;
965 struct raw_iter_state *i;
966
967 err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state));
968 if (err < 0)
969 return err;
970
971 i = raw_seq_private((struct seq_file *)file->private_data);
972 i->h = h;
973 return 0;
974}
975EXPORT_SYMBOL_GPL(raw_seq_open);
976
977static int raw_v4_seq_open(struct inode *inode, struct file *file)
978{
979 return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops);
980}
981
982static const struct file_operations raw_seq_fops = {
983 .owner = THIS_MODULE,
984 .open = raw_v4_seq_open,
985 .read = seq_read,
986 .llseek = seq_lseek,
987 .release = seq_release_net,
988};
989
990static __net_init int raw_init_net(struct net *net)
991{
992 if (!proc_net_fops_create(net, "raw", S_IRUGO, &raw_seq_fops))
993 return -ENOMEM;
994
995 return 0;
996}
997
998static __net_exit void raw_exit_net(struct net *net)
999{
1000 proc_net_remove(net, "raw");
1001}
1002
1003static __net_initdata struct pernet_operations raw_net_ops = {
1004 .init = raw_init_net,
1005 .exit = raw_exit_net,
1006};
1007
1008int __init raw_proc_init(void)
1009{
1010 return register_pernet_subsys(&raw_net_ops);
1011}
1012
1013void __init raw_proc_exit(void)
1014{
1015 unregister_pernet_subsys(&raw_net_ops);
1016}
1017#endif