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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/ip.h>
64#include <linux/net.h>
65#include <net/ip.h>
66#include <net/icmp.h>
67#include <net/udp.h>
68#include <net/raw.h>
69#include <net/snmp.h>
70#include <net/tcp_states.h>
71#include <net/inet_common.h>
72#include <net/checksum.h>
73#include <net/xfrm.h>
74#include <linux/rtnetlink.h>
75#include <linux/proc_fs.h>
76#include <linux/seq_file.h>
77#include <linux/netfilter.h>
78#include <linux/netfilter_ipv4.h>
79#include <linux/compat.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)->inet_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->inet_num == num &&
119 !(inet->inet_daddr && inet->inet_daddr != raddr) &&
120 !(inet->inet_rcv_saddr && inet->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 (ip_queue_rcv_skb(sk, skb) < 0) {
295 kfree_skb(skb);
296 return NET_RX_DROP;
297 }
298
299 return NET_RX_SUCCESS;
300}
301
302int raw_rcv(struct sock *sk, struct sk_buff *skb)
303{
304 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
305 atomic_inc(&sk->sk_drops);
306 kfree_skb(skb);
307 return NET_RX_DROP;
308 }
309 nf_reset(skb);
310
311 skb_push(skb, skb->data - skb_network_header(skb));
312
313 raw_rcv_skb(sk, skb);
314 return 0;
315}
316
317static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
318 struct rtable **rtp,
319 unsigned int flags)
320{
321 struct inet_sock *inet = inet_sk(sk);
322 struct net *net = sock_net(sk);
323 struct iphdr *iph;
324 struct sk_buff *skb;
325 unsigned int iphlen;
326 int err;
327 struct rtable *rt = *rtp;
328
329 if (length > rt->dst.dev->mtu) {
330 ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->inet_dport,
331 rt->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->dst.dev) + 15,
339 flags & MSG_DONTWAIT, &err);
340 if (skb == NULL)
341 goto error;
342 skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev));
343
344 skb->priority = sk->sk_priority;
345 skb->mark = sk->sk_mark;
346 skb_dst_set(skb, &rt->dst);
347 *rtp = NULL;
348
349 skb_reset_network_header(skb);
350 iph = ip_hdr(skb);
351 skb_put(skb, length);
352
353 skb->ip_summed = CHECKSUM_NONE;
354
355 skb->transport_header = skb->network_header;
356 err = -EFAULT;
357 if (memcpy_fromiovecend((void *)iph, from, 0, length))
358 goto error_free;
359
360 iphlen = iph->ihl * 4;
361
362
363
364
365
366
367
368
369 err = -EINVAL;
370 if (iphlen > length)
371 goto error_free;
372
373 if (iphlen >= sizeof(*iph)) {
374 if (!iph->saddr)
375 iph->saddr = rt->rt_src;
376 iph->check = 0;
377 iph->tot_len = htons(length);
378 if (!iph->id)
379 ip_select_ident(iph, &rt->dst, NULL);
380
381 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
382 }
383 if (iph->protocol == IPPROTO_ICMP)
384 icmp_out_count(net, ((struct icmphdr *)
385 skb_transport_header(skb))->type);
386
387 err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL,
388 rt->dst.dev, dst_output);
389 if (err > 0)
390 err = net_xmit_errno(err);
391 if (err)
392 goto error;
393out:
394 return 0;
395
396error_free:
397 kfree_skb(skb);
398error:
399 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
400 if (err == -ENOBUFS && !inet->recverr)
401 err = 0;
402 return err;
403}
404
405static int raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
406{
407 struct iovec *iov;
408 u8 __user *type = NULL;
409 u8 __user *code = NULL;
410 int probed = 0;
411 unsigned int i;
412
413 if (!msg->msg_iov)
414 return 0;
415
416 for (i = 0; i < msg->msg_iovlen; i++) {
417 iov = &msg->msg_iov[i];
418 if (!iov)
419 continue;
420
421 switch (fl->proto) {
422 case IPPROTO_ICMP:
423
424 if (iov->iov_base && iov->iov_len < 1)
425 break;
426
427 if (!type) {
428 type = iov->iov_base;
429
430 if (iov->iov_len > 1)
431 code = type + 1;
432 } else if (!code)
433 code = iov->iov_base;
434
435 if (type && code) {
436 if (get_user(fl->fl_icmp_type, type) ||
437 get_user(fl->fl_icmp_code, code))
438 return -EFAULT;
439 probed = 1;
440 }
441 break;
442 default:
443 probed = 1;
444 break;
445 }
446 if (probed)
447 break;
448 }
449 return 0;
450}
451
452static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
453 size_t len)
454{
455 struct inet_sock *inet = inet_sk(sk);
456 struct ipcm_cookie ipc;
457 struct rtable *rt = NULL;
458 int free = 0;
459 __be32 daddr;
460 __be32 saddr;
461 u8 tos;
462 int err;
463
464 err = -EMSGSIZE;
465 if (len > 0xFFFF)
466 goto out;
467
468
469
470
471
472 err = -EOPNOTSUPP;
473 if (msg->msg_flags & MSG_OOB)
474 goto out;
475
476
477
478
479
480 if (msg->msg_namelen) {
481 struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name;
482 err = -EINVAL;
483 if (msg->msg_namelen < sizeof(*usin))
484 goto out;
485 if (usin->sin_family != AF_INET) {
486 static int complained;
487 if (!complained++)
488 printk(KERN_INFO "%s forgot to set AF_INET in "
489 "raw sendmsg. Fix it!\n",
490 current->comm);
491 err = -EAFNOSUPPORT;
492 if (usin->sin_family)
493 goto out;
494 }
495 daddr = usin->sin_addr.s_addr;
496
497
498
499
500 } else {
501 err = -EDESTADDRREQ;
502 if (sk->sk_state != TCP_ESTABLISHED)
503 goto out;
504 daddr = inet->inet_daddr;
505 }
506
507 ipc.addr = inet->inet_saddr;
508 ipc.opt = NULL;
509 ipc.tx_flags = 0;
510 ipc.oif = sk->sk_bound_dev_if;
511
512 if (msg->msg_controllen) {
513 err = ip_cmsg_send(sock_net(sk), msg, &ipc);
514 if (err)
515 goto out;
516 if (ipc.opt)
517 free = 1;
518 }
519
520 saddr = ipc.addr;
521 ipc.addr = daddr;
522
523 if (!ipc.opt)
524 ipc.opt = inet->opt;
525
526 if (ipc.opt) {
527 err = -EINVAL;
528
529
530
531 if (inet->hdrincl)
532 goto done;
533 if (ipc.opt->srr) {
534 if (!daddr)
535 goto done;
536 daddr = ipc.opt->faddr;
537 }
538 }
539 tos = RT_CONN_FLAGS(sk);
540 if (msg->msg_flags & MSG_DONTROUTE)
541 tos |= RTO_ONLINK;
542
543 if (ipv4_is_multicast(daddr)) {
544 if (!ipc.oif)
545 ipc.oif = inet->mc_index;
546 if (!saddr)
547 saddr = inet->mc_addr;
548 }
549
550 {
551 struct flowi fl = { .oif = ipc.oif,
552 .mark = sk->sk_mark,
553 .fl4_dst = daddr,
554 .fl4_src = saddr,
555 .fl4_tos = tos,
556 .proto = inet->hdrincl ? IPPROTO_RAW :
557 sk->sk_protocol,
558 };
559 if (!inet->hdrincl) {
560 err = raw_probe_proto_opt(&fl, msg);
561 if (err)
562 goto done;
563 }
564
565 security_sk_classify_flow(sk, &fl);
566 err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 1);
567 }
568 if (err)
569 goto done;
570
571 err = -EACCES;
572 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
573 goto done;
574
575 if (msg->msg_flags & MSG_CONFIRM)
576 goto do_confirm;
577back_from_confirm:
578
579 if (inet->hdrincl)
580 err = raw_send_hdrinc(sk, msg->msg_iov, len,
581 &rt, msg->msg_flags);
582
583 else {
584 if (!ipc.addr)
585 ipc.addr = rt->rt_dst;
586 lock_sock(sk);
587 err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
588 &ipc, &rt, msg->msg_flags);
589 if (err)
590 ip_flush_pending_frames(sk);
591 else if (!(msg->msg_flags & MSG_MORE)) {
592 err = ip_push_pending_frames(sk);
593 if (err == -ENOBUFS && !inet->recverr)
594 err = 0;
595 }
596 release_sock(sk);
597 }
598done:
599 if (free)
600 kfree(ipc.opt);
601 ip_rt_put(rt);
602
603out:
604 if (err < 0)
605 return err;
606 return len;
607
608do_confirm:
609 dst_confirm(&rt->dst);
610 if (!(msg->msg_flags & MSG_PROBE) || len)
611 goto back_from_confirm;
612 err = 0;
613 goto done;
614}
615
616static void raw_close(struct sock *sk, long timeout)
617{
618
619
620
621 ip_ra_control(sk, 0, NULL);
622
623 sk_common_release(sk);
624}
625
626static void raw_destroy(struct sock *sk)
627{
628 lock_sock(sk);
629 ip_flush_pending_frames(sk);
630 release_sock(sk);
631}
632
633
634static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
635{
636 struct inet_sock *inet = inet_sk(sk);
637 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
638 int ret = -EINVAL;
639 int chk_addr_ret;
640
641 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
642 goto out;
643 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
644 ret = -EADDRNOTAVAIL;
645 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
646 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
647 goto out;
648 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
649 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
650 inet->inet_saddr = 0;
651 sk_dst_reset(sk);
652 ret = 0;
653out: return ret;
654}
655
656
657
658
659
660
661static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
662 size_t len, int noblock, int flags, int *addr_len)
663{
664 struct inet_sock *inet = inet_sk(sk);
665 size_t copied = 0;
666 int err = -EOPNOTSUPP;
667 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
668 struct sk_buff *skb;
669
670 if (flags & MSG_OOB)
671 goto out;
672
673 if (addr_len)
674 *addr_len = sizeof(*sin);
675
676 if (flags & MSG_ERRQUEUE) {
677 err = ip_recv_error(sk, msg, len);
678 goto out;
679 }
680
681 skb = skb_recv_datagram(sk, flags, noblock, &err);
682 if (!skb)
683 goto out;
684
685 copied = skb->len;
686 if (len < copied) {
687 msg->msg_flags |= MSG_TRUNC;
688 copied = len;
689 }
690
691 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
692 if (err)
693 goto done;
694
695 sock_recv_ts_and_drops(msg, sk, skb);
696
697
698 if (sin) {
699 sin->sin_family = AF_INET;
700 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
701 sin->sin_port = 0;
702 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
703 }
704 if (inet->cmsg_flags)
705 ip_cmsg_recv(msg, skb);
706 if (flags & MSG_TRUNC)
707 copied = skb->len;
708done:
709 skb_free_datagram(sk, skb);
710out:
711 if (err)
712 return err;
713 return copied;
714}
715
716static int raw_init(struct sock *sk)
717{
718 struct raw_sock *rp = raw_sk(sk);
719
720 if (inet_sk(sk)->inet_num == IPPROTO_ICMP)
721 memset(&rp->filter, 0, sizeof(rp->filter));
722 return 0;
723}
724
725static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
726{
727 if (optlen > sizeof(struct icmp_filter))
728 optlen = sizeof(struct icmp_filter);
729 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
730 return -EFAULT;
731 return 0;
732}
733
734static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
735{
736 int len, ret = -EFAULT;
737
738 if (get_user(len, optlen))
739 goto out;
740 ret = -EINVAL;
741 if (len < 0)
742 goto out;
743 if (len > sizeof(struct icmp_filter))
744 len = sizeof(struct icmp_filter);
745 ret = -EFAULT;
746 if (put_user(len, optlen) ||
747 copy_to_user(optval, &raw_sk(sk)->filter, len))
748 goto out;
749 ret = 0;
750out: return ret;
751}
752
753static int do_raw_setsockopt(struct sock *sk, int level, int optname,
754 char __user *optval, unsigned int optlen)
755{
756 if (optname == ICMP_FILTER) {
757 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
758 return -EOPNOTSUPP;
759 else
760 return raw_seticmpfilter(sk, optval, optlen);
761 }
762 return -ENOPROTOOPT;
763}
764
765static int raw_setsockopt(struct sock *sk, int level, int optname,
766 char __user *optval, unsigned int optlen)
767{
768 if (level != SOL_RAW)
769 return ip_setsockopt(sk, level, optname, optval, optlen);
770 return do_raw_setsockopt(sk, level, optname, optval, optlen);
771}
772
773#ifdef CONFIG_COMPAT
774static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
775 char __user *optval, unsigned int optlen)
776{
777 if (level != SOL_RAW)
778 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
779 return do_raw_setsockopt(sk, level, optname, optval, optlen);
780}
781#endif
782
783static int do_raw_getsockopt(struct sock *sk, int level, int optname,
784 char __user *optval, int __user *optlen)
785{
786 if (optname == ICMP_FILTER) {
787 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
788 return -EOPNOTSUPP;
789 else
790 return raw_geticmpfilter(sk, optval, optlen);
791 }
792 return -ENOPROTOOPT;
793}
794
795static int raw_getsockopt(struct sock *sk, int level, int optname,
796 char __user *optval, int __user *optlen)
797{
798 if (level != SOL_RAW)
799 return ip_getsockopt(sk, level, optname, optval, optlen);
800 return do_raw_getsockopt(sk, level, optname, optval, optlen);
801}
802
803#ifdef CONFIG_COMPAT
804static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
805 char __user *optval, int __user *optlen)
806{
807 if (level != SOL_RAW)
808 return compat_ip_getsockopt(sk, level, optname, optval, optlen);
809 return do_raw_getsockopt(sk, level, optname, optval, optlen);
810}
811#endif
812
813static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
814{
815 switch (cmd) {
816 case SIOCOUTQ: {
817 int amount = sk_wmem_alloc_get(sk);
818
819 return put_user(amount, (int __user *)arg);
820 }
821 case SIOCINQ: {
822 struct sk_buff *skb;
823 int amount = 0;
824
825 spin_lock_bh(&sk->sk_receive_queue.lock);
826 skb = skb_peek(&sk->sk_receive_queue);
827 if (skb != NULL)
828 amount = skb->len;
829 spin_unlock_bh(&sk->sk_receive_queue.lock);
830 return put_user(amount, (int __user *)arg);
831 }
832
833 default:
834#ifdef CONFIG_IP_MROUTE
835 return ipmr_ioctl(sk, cmd, (void __user *)arg);
836#else
837 return -ENOIOCTLCMD;
838#endif
839 }
840}
841
842#ifdef CONFIG_COMPAT
843static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
844{
845 switch (cmd) {
846 case SIOCOUTQ:
847 case SIOCINQ:
848 return -ENOIOCTLCMD;
849 default:
850#ifdef CONFIG_IP_MROUTE
851 return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
852#else
853 return -ENOIOCTLCMD;
854#endif
855 }
856}
857#endif
858
859struct proto raw_prot = {
860 .name = "RAW",
861 .owner = THIS_MODULE,
862 .close = raw_close,
863 .destroy = raw_destroy,
864 .connect = ip4_datagram_connect,
865 .disconnect = udp_disconnect,
866 .ioctl = raw_ioctl,
867 .init = raw_init,
868 .setsockopt = raw_setsockopt,
869 .getsockopt = raw_getsockopt,
870 .sendmsg = raw_sendmsg,
871 .recvmsg = raw_recvmsg,
872 .bind = raw_bind,
873 .backlog_rcv = raw_rcv_skb,
874 .hash = raw_hash_sk,
875 .unhash = raw_unhash_sk,
876 .obj_size = sizeof(struct raw_sock),
877 .h.raw_hash = &raw_v4_hashinfo,
878#ifdef CONFIG_COMPAT
879 .compat_setsockopt = compat_raw_setsockopt,
880 .compat_getsockopt = compat_raw_getsockopt,
881 .compat_ioctl = compat_raw_ioctl,
882#endif
883};
884
885#ifdef CONFIG_PROC_FS
886static struct sock *raw_get_first(struct seq_file *seq)
887{
888 struct sock *sk;
889 struct raw_iter_state *state = raw_seq_private(seq);
890
891 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
892 ++state->bucket) {
893 struct hlist_node *node;
894
895 sk_for_each(sk, node, &state->h->ht[state->bucket])
896 if (sock_net(sk) == seq_file_net(seq))
897 goto found;
898 }
899 sk = NULL;
900found:
901 return sk;
902}
903
904static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
905{
906 struct raw_iter_state *state = raw_seq_private(seq);
907
908 do {
909 sk = sk_next(sk);
910try_again:
911 ;
912 } while (sk && sock_net(sk) != seq_file_net(seq));
913
914 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
915 sk = sk_head(&state->h->ht[state->bucket]);
916 goto try_again;
917 }
918 return sk;
919}
920
921static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
922{
923 struct sock *sk = raw_get_first(seq);
924
925 if (sk)
926 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
927 --pos;
928 return pos ? NULL : sk;
929}
930
931void *raw_seq_start(struct seq_file *seq, loff_t *pos)
932{
933 struct raw_iter_state *state = raw_seq_private(seq);
934
935 read_lock(&state->h->lock);
936 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
937}
938EXPORT_SYMBOL_GPL(raw_seq_start);
939
940void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
941{
942 struct sock *sk;
943
944 if (v == SEQ_START_TOKEN)
945 sk = raw_get_first(seq);
946 else
947 sk = raw_get_next(seq, v);
948 ++*pos;
949 return sk;
950}
951EXPORT_SYMBOL_GPL(raw_seq_next);
952
953void raw_seq_stop(struct seq_file *seq, void *v)
954{
955 struct raw_iter_state *state = raw_seq_private(seq);
956
957 read_unlock(&state->h->lock);
958}
959EXPORT_SYMBOL_GPL(raw_seq_stop);
960
961static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
962{
963 struct inet_sock *inet = inet_sk(sp);
964 __be32 dest = inet->inet_daddr,
965 src = inet->inet_rcv_saddr;
966 __u16 destp = 0,
967 srcp = inet->inet_num;
968
969 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
970 " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
971 i, src, srcp, dest, destp, sp->sk_state,
972 sk_wmem_alloc_get(sp),
973 sk_rmem_alloc_get(sp),
974 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
975 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
976}
977
978static int raw_seq_show(struct seq_file *seq, void *v)
979{
980 if (v == SEQ_START_TOKEN)
981 seq_printf(seq, " sl local_address rem_address st tx_queue "
982 "rx_queue tr tm->when retrnsmt uid timeout "
983 "inode ref pointer drops\n");
984 else
985 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
986 return 0;
987}
988
989static const struct seq_operations raw_seq_ops = {
990 .start = raw_seq_start,
991 .next = raw_seq_next,
992 .stop = raw_seq_stop,
993 .show = raw_seq_show,
994};
995
996int raw_seq_open(struct inode *ino, struct file *file,
997 struct raw_hashinfo *h, const struct seq_operations *ops)
998{
999 int err;
1000 struct raw_iter_state *i;
1001
1002 err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state));
1003 if (err < 0)
1004 return err;
1005
1006 i = raw_seq_private((struct seq_file *)file->private_data);
1007 i->h = h;
1008 return 0;
1009}
1010EXPORT_SYMBOL_GPL(raw_seq_open);
1011
1012static int raw_v4_seq_open(struct inode *inode, struct file *file)
1013{
1014 return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops);
1015}
1016
1017static const struct file_operations raw_seq_fops = {
1018 .owner = THIS_MODULE,
1019 .open = raw_v4_seq_open,
1020 .read = seq_read,
1021 .llseek = seq_lseek,
1022 .release = seq_release_net,
1023};
1024
1025static __net_init int raw_init_net(struct net *net)
1026{
1027 if (!proc_net_fops_create(net, "raw", S_IRUGO, &raw_seq_fops))
1028 return -ENOMEM;
1029
1030 return 0;
1031}
1032
1033static __net_exit void raw_exit_net(struct net *net)
1034{
1035 proc_net_remove(net, "raw");
1036}
1037
1038static __net_initdata struct pernet_operations raw_net_ops = {
1039 .init = raw_init_net,
1040 .exit = raw_exit_net,
1041};
1042
1043int __init raw_proc_init(void)
1044{
1045 return register_pernet_subsys(&raw_net_ops);
1046}
1047
1048void __init raw_proc_exit(void)
1049{
1050 unregister_pernet_subsys(&raw_net_ops);
1051}
1052#endif
1053