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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
80static struct raw_hashinfo raw_v4_hashinfo = {
81 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
82};
83
84void raw_hash_sk(struct sock *sk)
85{
86 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
87 struct hlist_head *head;
88
89 head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)];
90
91 write_lock_bh(&h->lock);
92 sk_add_node(sk, head);
93 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
94 write_unlock_bh(&h->lock);
95}
96EXPORT_SYMBOL_GPL(raw_hash_sk);
97
98void raw_unhash_sk(struct sock *sk)
99{
100 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
101
102 write_lock_bh(&h->lock);
103 if (sk_del_node_init(sk))
104 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
105 write_unlock_bh(&h->lock);
106}
107EXPORT_SYMBOL_GPL(raw_unhash_sk);
108
109static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk,
110 unsigned short num, __be32 raddr, __be32 laddr, int dif)
111{
112 struct hlist_node *node;
113
114 sk_for_each_from(sk, node) {
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 __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb)
133{
134 int type;
135
136 if (!pskb_may_pull(skb, sizeof(struct icmphdr)))
137 return 1;
138
139 type = icmp_hdr(skb)->type;
140 if (type < 32) {
141 __u32 data = raw_sk(sk)->filter.data;
142
143 return ((1 << type) & data) != 0;
144 }
145
146
147 return 0;
148}
149
150
151
152
153
154
155
156static int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
157{
158 struct sock *sk;
159 struct hlist_head *head;
160 int delivered = 0;
161 struct net *net;
162
163 read_lock(&raw_v4_hashinfo.lock);
164 head = &raw_v4_hashinfo.ht[hash];
165 if (hlist_empty(head))
166 goto out;
167
168 net = dev_net(skb->dev);
169 sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol,
170 iph->saddr, iph->daddr,
171 skb->dev->ifindex);
172
173 while (sk) {
174 delivered = 1;
175 if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) {
176 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
177
178
179 if (clone)
180 raw_rcv(sk, clone);
181 }
182 sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol,
183 iph->saddr, iph->daddr,
184 skb->dev->ifindex);
185 }
186out:
187 read_unlock(&raw_v4_hashinfo.lock);
188 return delivered;
189}
190
191int raw_local_deliver(struct sk_buff *skb, int protocol)
192{
193 int hash;
194 struct sock *raw_sk;
195
196 hash = protocol & (RAW_HTABLE_SIZE - 1);
197 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
198
199
200
201
202 if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash))
203 raw_sk = NULL;
204
205 return raw_sk != NULL;
206
207}
208
209static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
210{
211 struct inet_sock *inet = inet_sk(sk);
212 const int type = icmp_hdr(skb)->type;
213 const int code = icmp_hdr(skb)->code;
214 int err = 0;
215 int harderr = 0;
216
217
218
219
220
221
222 if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED)
223 return;
224
225 switch (type) {
226 default:
227 case ICMP_TIME_EXCEEDED:
228 err = EHOSTUNREACH;
229 break;
230 case ICMP_SOURCE_QUENCH:
231 return;
232 case ICMP_PARAMETERPROB:
233 err = EPROTO;
234 harderr = 1;
235 break;
236 case ICMP_DEST_UNREACH:
237 err = EHOSTUNREACH;
238 if (code > NR_ICMP_UNREACH)
239 break;
240 err = icmp_err_convert[code].errno;
241 harderr = icmp_err_convert[code].fatal;
242 if (code == ICMP_FRAG_NEEDED) {
243 harderr = inet->pmtudisc != IP_PMTUDISC_DONT;
244 err = EMSGSIZE;
245 }
246 }
247
248 if (inet->recverr) {
249 struct iphdr *iph = (struct iphdr *)skb->data;
250 u8 *payload = skb->data + (iph->ihl << 2);
251
252 if (inet->hdrincl)
253 payload = skb->data;
254 ip_icmp_error(sk, skb, err, 0, info, payload);
255 }
256
257 if (inet->recverr || harderr) {
258 sk->sk_err = err;
259 sk->sk_error_report(sk);
260 }
261}
262
263void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
264{
265 int hash;
266 struct sock *raw_sk;
267 struct iphdr *iph;
268 struct net *net;
269
270 hash = protocol & (RAW_HTABLE_SIZE - 1);
271
272 read_lock(&raw_v4_hashinfo.lock);
273 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
274 if (raw_sk != NULL) {
275 iph = (struct iphdr *)skb->data;
276 net = dev_net(skb->dev);
277
278 while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
279 iph->daddr, iph->saddr,
280 skb->dev->ifindex)) != NULL) {
281 raw_err(raw_sk, skb, info);
282 raw_sk = sk_next(raw_sk);
283 iph = (struct iphdr *)skb->data;
284 }
285 }
286 read_unlock(&raw_v4_hashinfo.lock);
287}
288
289static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb)
290{
291
292
293 if (ip_queue_rcv_skb(sk, skb) < 0) {
294 kfree_skb(skb);
295 return NET_RX_DROP;
296 }
297
298 return NET_RX_SUCCESS;
299}
300
301int raw_rcv(struct sock *sk, struct sk_buff *skb)
302{
303 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
304 atomic_inc(&sk->sk_drops);
305 kfree_skb(skb);
306 return NET_RX_DROP;
307 }
308 nf_reset(skb);
309
310 skb_push(skb, skb->data - skb_network_header(skb));
311
312 raw_rcv_skb(sk, skb);
313 return 0;
314}
315
316static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
317 struct rtable *rt,
318 unsigned int flags)
319{
320 struct inet_sock *inet = inet_sk(sk);
321 struct net *net = sock_net(sk);
322 struct iphdr *iph;
323 struct sk_buff *skb;
324 unsigned int iphlen;
325 int err;
326
327 if (length > rt->u.dst.dev->mtu) {
328 ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->inet_dport,
329 rt->u.dst.dev->mtu);
330 return -EMSGSIZE;
331 }
332 if (flags&MSG_PROBE)
333 goto out;
334
335 skb = sock_alloc_send_skb(sk,
336 length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15,
337 flags & MSG_DONTWAIT, &err);
338 if (skb == NULL)
339 goto error;
340 skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
341
342 skb->priority = sk->sk_priority;
343 skb->mark = sk->sk_mark;
344 skb_dst_set(skb, dst_clone(&rt->u.dst));
345
346 skb_reset_network_header(skb);
347 iph = ip_hdr(skb);
348 skb_put(skb, length);
349
350 skb->ip_summed = CHECKSUM_NONE;
351
352 skb->transport_header = skb->network_header;
353 err = -EFAULT;
354 if (memcpy_fromiovecend((void *)iph, from, 0, length))
355 goto error_free;
356
357 iphlen = iph->ihl * 4;
358
359
360
361
362
363
364
365
366 err = -EINVAL;
367 if (iphlen > length)
368 goto error_free;
369
370 if (iphlen >= sizeof(*iph)) {
371 if (!iph->saddr)
372 iph->saddr = rt->rt_src;
373 iph->check = 0;
374 iph->tot_len = htons(length);
375 if (!iph->id)
376 ip_select_ident(iph, &rt->u.dst, NULL);
377
378 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
379 }
380 if (iph->protocol == IPPROTO_ICMP)
381 icmp_out_count(net, ((struct icmphdr *)
382 skb_transport_header(skb))->type);
383
384 err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL,
385 rt->u.dst.dev, dst_output);
386 if (err > 0)
387 err = net_xmit_errno(err);
388 if (err)
389 goto error;
390out:
391 return 0;
392
393error_free:
394 kfree_skb(skb);
395error:
396 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
397 if (err == -ENOBUFS && !inet->recverr)
398 err = 0;
399 return err;
400}
401
402static int raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
403{
404 struct iovec *iov;
405 u8 __user *type = NULL;
406 u8 __user *code = NULL;
407 int probed = 0;
408 unsigned int i;
409
410 if (!msg->msg_iov)
411 return 0;
412
413 for (i = 0; i < msg->msg_iovlen; i++) {
414 iov = &msg->msg_iov[i];
415 if (!iov)
416 continue;
417
418 switch (fl->proto) {
419 case IPPROTO_ICMP:
420
421 if (iov->iov_base && iov->iov_len < 1)
422 break;
423
424 if (!type) {
425 type = iov->iov_base;
426
427 if (iov->iov_len > 1)
428 code = type + 1;
429 } else if (!code)
430 code = iov->iov_base;
431
432 if (type && code) {
433 if (get_user(fl->fl_icmp_type, type) ||
434 get_user(fl->fl_icmp_code, code))
435 return -EFAULT;
436 probed = 1;
437 }
438 break;
439 default:
440 probed = 1;
441 break;
442 }
443 if (probed)
444 break;
445 }
446 return 0;
447}
448
449static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
450 size_t len)
451{
452 struct inet_sock *inet = inet_sk(sk);
453 struct ipcm_cookie ipc;
454 struct rtable *rt = NULL;
455 int free = 0;
456 __be32 daddr;
457 __be32 saddr;
458 u8 tos;
459 int err;
460
461 err = -EMSGSIZE;
462 if (len > 0xFFFF)
463 goto out;
464
465
466
467
468
469 err = -EOPNOTSUPP;
470 if (msg->msg_flags & MSG_OOB)
471 goto out;
472
473
474
475
476
477 if (msg->msg_namelen) {
478 struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name;
479 err = -EINVAL;
480 if (msg->msg_namelen < sizeof(*usin))
481 goto out;
482 if (usin->sin_family != AF_INET) {
483 static int complained;
484 if (!complained++)
485 printk(KERN_INFO "%s forgot to set AF_INET in "
486 "raw sendmsg. Fix it!\n",
487 current->comm);
488 err = -EAFNOSUPPORT;
489 if (usin->sin_family)
490 goto out;
491 }
492 daddr = usin->sin_addr.s_addr;
493
494
495
496
497 } else {
498 err = -EDESTADDRREQ;
499 if (sk->sk_state != TCP_ESTABLISHED)
500 goto out;
501 daddr = inet->inet_daddr;
502 }
503
504 ipc.addr = inet->inet_saddr;
505 ipc.opt = NULL;
506 ipc.shtx.flags = 0;
507 ipc.oif = sk->sk_bound_dev_if;
508
509 if (msg->msg_controllen) {
510 err = ip_cmsg_send(sock_net(sk), msg, &ipc);
511 if (err)
512 goto out;
513 if (ipc.opt)
514 free = 1;
515 }
516
517 saddr = ipc.addr;
518 ipc.addr = daddr;
519
520 if (!ipc.opt)
521 ipc.opt = inet->opt;
522
523 if (ipc.opt) {
524 err = -EINVAL;
525
526
527
528 if (inet->hdrincl)
529 goto done;
530 if (ipc.opt->srr) {
531 if (!daddr)
532 goto done;
533 daddr = ipc.opt->faddr;
534 }
535 }
536 tos = RT_CONN_FLAGS(sk);
537 if (msg->msg_flags & MSG_DONTROUTE)
538 tos |= RTO_ONLINK;
539
540 if (ipv4_is_multicast(daddr)) {
541 if (!ipc.oif)
542 ipc.oif = inet->mc_index;
543 if (!saddr)
544 saddr = inet->mc_addr;
545 }
546
547 {
548 struct flowi fl = { .oif = ipc.oif,
549 .mark = sk->sk_mark,
550 .nl_u = { .ip4_u =
551 { .daddr = daddr,
552 .saddr = saddr,
553 .tos = tos } },
554 .proto = inet->hdrincl ? IPPROTO_RAW :
555 sk->sk_protocol,
556 };
557 if (!inet->hdrincl) {
558 err = raw_probe_proto_opt(&fl, msg);
559 if (err)
560 goto done;
561 }
562
563 security_sk_classify_flow(sk, &fl);
564 err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 1);
565 }
566 if (err)
567 goto done;
568
569 err = -EACCES;
570 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
571 goto done;
572
573 if (msg->msg_flags & MSG_CONFIRM)
574 goto do_confirm;
575back_from_confirm:
576
577 if (inet->hdrincl)
578 err = raw_send_hdrinc(sk, msg->msg_iov, len,
579 rt, msg->msg_flags);
580
581 else {
582 if (!ipc.addr)
583 ipc.addr = rt->rt_dst;
584 lock_sock(sk);
585 err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
586 &ipc, &rt, msg->msg_flags);
587 if (err)
588 ip_flush_pending_frames(sk);
589 else if (!(msg->msg_flags & MSG_MORE)) {
590 err = ip_push_pending_frames(sk);
591 if (err == -ENOBUFS && !inet->recverr)
592 err = 0;
593 }
594 release_sock(sk);
595 }
596done:
597 if (free)
598 kfree(ipc.opt);
599 ip_rt_put(rt);
600
601out:
602 if (err < 0)
603 return err;
604 return len;
605
606do_confirm:
607 dst_confirm(&rt->u.dst);
608 if (!(msg->msg_flags & MSG_PROBE) || len)
609 goto back_from_confirm;
610 err = 0;
611 goto done;
612}
613
614static void raw_close(struct sock *sk, long timeout)
615{
616
617
618
619 ip_ra_control(sk, 0, NULL);
620
621 sk_common_release(sk);
622}
623
624static void raw_destroy(struct sock *sk)
625{
626 lock_sock(sk);
627 ip_flush_pending_frames(sk);
628 release_sock(sk);
629}
630
631
632static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
633{
634 struct inet_sock *inet = inet_sk(sk);
635 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
636 int ret = -EINVAL;
637 int chk_addr_ret;
638
639 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
640 goto out;
641 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
642 ret = -EADDRNOTAVAIL;
643 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
644 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
645 goto out;
646 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
647 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
648 inet->inet_saddr = 0;
649 sk_dst_reset(sk);
650 ret = 0;
651out: return ret;
652}
653
654
655
656
657
658
659static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
660 size_t len, int noblock, int flags, int *addr_len)
661{
662 struct inet_sock *inet = inet_sk(sk);
663 size_t copied = 0;
664 int err = -EOPNOTSUPP;
665 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
666 struct sk_buff *skb;
667
668 if (flags & MSG_OOB)
669 goto out;
670
671 if (addr_len)
672 *addr_len = sizeof(*sin);
673
674 if (flags & MSG_ERRQUEUE) {
675 err = ip_recv_error(sk, msg, len);
676 goto out;
677 }
678
679 skb = skb_recv_datagram(sk, flags, noblock, &err);
680 if (!skb)
681 goto out;
682
683 copied = skb->len;
684 if (len < copied) {
685 msg->msg_flags |= MSG_TRUNC;
686 copied = len;
687 }
688
689 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
690 if (err)
691 goto done;
692
693 sock_recv_ts_and_drops(msg, sk, skb);
694
695
696 if (sin) {
697 sin->sin_family = AF_INET;
698 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
699 sin->sin_port = 0;
700 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
701 }
702 if (inet->cmsg_flags)
703 ip_cmsg_recv(msg, skb);
704 if (flags & MSG_TRUNC)
705 copied = skb->len;
706done:
707 skb_free_datagram(sk, skb);
708out:
709 if (err)
710 return err;
711 return copied;
712}
713
714static int raw_init(struct sock *sk)
715{
716 struct raw_sock *rp = raw_sk(sk);
717
718 if (inet_sk(sk)->inet_num == IPPROTO_ICMP)
719 memset(&rp->filter, 0, sizeof(rp->filter));
720 return 0;
721}
722
723static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
724{
725 if (optlen > sizeof(struct icmp_filter))
726 optlen = sizeof(struct icmp_filter);
727 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
728 return -EFAULT;
729 return 0;
730}
731
732static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
733{
734 int len, ret = -EFAULT;
735
736 if (get_user(len, optlen))
737 goto out;
738 ret = -EINVAL;
739 if (len < 0)
740 goto out;
741 if (len > sizeof(struct icmp_filter))
742 len = sizeof(struct icmp_filter);
743 ret = -EFAULT;
744 if (put_user(len, optlen) ||
745 copy_to_user(optval, &raw_sk(sk)->filter, len))
746 goto out;
747 ret = 0;
748out: return ret;
749}
750
751static int do_raw_setsockopt(struct sock *sk, int level, int optname,
752 char __user *optval, unsigned int optlen)
753{
754 if (optname == ICMP_FILTER) {
755 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
756 return -EOPNOTSUPP;
757 else
758 return raw_seticmpfilter(sk, optval, optlen);
759 }
760 return -ENOPROTOOPT;
761}
762
763static int raw_setsockopt(struct sock *sk, int level, int optname,
764 char __user *optval, unsigned int optlen)
765{
766 if (level != SOL_RAW)
767 return ip_setsockopt(sk, level, optname, optval, optlen);
768 return do_raw_setsockopt(sk, level, optname, optval, optlen);
769}
770
771#ifdef CONFIG_COMPAT
772static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
773 char __user *optval, unsigned int optlen)
774{
775 if (level != SOL_RAW)
776 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
777 return do_raw_setsockopt(sk, level, optname, optval, optlen);
778}
779#endif
780
781static int do_raw_getsockopt(struct sock *sk, int level, int optname,
782 char __user *optval, int __user *optlen)
783{
784 if (optname == ICMP_FILTER) {
785 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
786 return -EOPNOTSUPP;
787 else
788 return raw_geticmpfilter(sk, optval, optlen);
789 }
790 return -ENOPROTOOPT;
791}
792
793static int raw_getsockopt(struct sock *sk, int level, int optname,
794 char __user *optval, int __user *optlen)
795{
796 if (level != SOL_RAW)
797 return ip_getsockopt(sk, level, optname, optval, optlen);
798 return do_raw_getsockopt(sk, level, optname, optval, optlen);
799}
800
801#ifdef CONFIG_COMPAT
802static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
803 char __user *optval, int __user *optlen)
804{
805 if (level != SOL_RAW)
806 return compat_ip_getsockopt(sk, level, optname, optval, optlen);
807 return do_raw_getsockopt(sk, level, optname, optval, optlen);
808}
809#endif
810
811static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
812{
813 switch (cmd) {
814 case SIOCOUTQ: {
815 int amount = sk_wmem_alloc_get(sk);
816
817 return put_user(amount, (int __user *)arg);
818 }
819 case SIOCINQ: {
820 struct sk_buff *skb;
821 int amount = 0;
822
823 spin_lock_bh(&sk->sk_receive_queue.lock);
824 skb = skb_peek(&sk->sk_receive_queue);
825 if (skb != NULL)
826 amount = skb->len;
827 spin_unlock_bh(&sk->sk_receive_queue.lock);
828 return put_user(amount, (int __user *)arg);
829 }
830
831 default:
832#ifdef CONFIG_IP_MROUTE
833 return ipmr_ioctl(sk, cmd, (void __user *)arg);
834#else
835 return -ENOIOCTLCMD;
836#endif
837 }
838}
839
840struct proto raw_prot = {
841 .name = "RAW",
842 .owner = THIS_MODULE,
843 .close = raw_close,
844 .destroy = raw_destroy,
845 .connect = ip4_datagram_connect,
846 .disconnect = udp_disconnect,
847 .ioctl = raw_ioctl,
848 .init = raw_init,
849 .setsockopt = raw_setsockopt,
850 .getsockopt = raw_getsockopt,
851 .sendmsg = raw_sendmsg,
852 .recvmsg = raw_recvmsg,
853 .bind = raw_bind,
854 .backlog_rcv = raw_rcv_skb,
855 .hash = raw_hash_sk,
856 .unhash = raw_unhash_sk,
857 .obj_size = sizeof(struct raw_sock),
858 .h.raw_hash = &raw_v4_hashinfo,
859#ifdef CONFIG_COMPAT
860 .compat_setsockopt = compat_raw_setsockopt,
861 .compat_getsockopt = compat_raw_getsockopt,
862#endif
863};
864
865#ifdef CONFIG_PROC_FS
866static struct sock *raw_get_first(struct seq_file *seq)
867{
868 struct sock *sk;
869 struct raw_iter_state *state = raw_seq_private(seq);
870
871 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
872 ++state->bucket) {
873 struct hlist_node *node;
874
875 sk_for_each(sk, node, &state->h->ht[state->bucket])
876 if (sock_net(sk) == seq_file_net(seq))
877 goto found;
878 }
879 sk = NULL;
880found:
881 return sk;
882}
883
884static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
885{
886 struct raw_iter_state *state = raw_seq_private(seq);
887
888 do {
889 sk = sk_next(sk);
890try_again:
891 ;
892 } while (sk && sock_net(sk) != seq_file_net(seq));
893
894 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
895 sk = sk_head(&state->h->ht[state->bucket]);
896 goto try_again;
897 }
898 return sk;
899}
900
901static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
902{
903 struct sock *sk = raw_get_first(seq);
904
905 if (sk)
906 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
907 --pos;
908 return pos ? NULL : sk;
909}
910
911void *raw_seq_start(struct seq_file *seq, loff_t *pos)
912{
913 struct raw_iter_state *state = raw_seq_private(seq);
914
915 read_lock(&state->h->lock);
916 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
917}
918EXPORT_SYMBOL_GPL(raw_seq_start);
919
920void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
921{
922 struct sock *sk;
923
924 if (v == SEQ_START_TOKEN)
925 sk = raw_get_first(seq);
926 else
927 sk = raw_get_next(seq, v);
928 ++*pos;
929 return sk;
930}
931EXPORT_SYMBOL_GPL(raw_seq_next);
932
933void raw_seq_stop(struct seq_file *seq, void *v)
934{
935 struct raw_iter_state *state = raw_seq_private(seq);
936
937 read_unlock(&state->h->lock);
938}
939EXPORT_SYMBOL_GPL(raw_seq_stop);
940
941static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
942{
943 struct inet_sock *inet = inet_sk(sp);
944 __be32 dest = inet->inet_daddr,
945 src = inet->inet_rcv_saddr;
946 __u16 destp = 0,
947 srcp = inet->inet_num;
948
949 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
950 " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
951 i, src, srcp, dest, destp, sp->sk_state,
952 sk_wmem_alloc_get(sp),
953 sk_rmem_alloc_get(sp),
954 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
955 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
956}
957
958static int raw_seq_show(struct seq_file *seq, void *v)
959{
960 if (v == SEQ_START_TOKEN)
961 seq_printf(seq, " sl local_address rem_address st tx_queue "
962 "rx_queue tr tm->when retrnsmt uid timeout "
963 "inode ref pointer drops\n");
964 else
965 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
966 return 0;
967}
968
969static const struct seq_operations raw_seq_ops = {
970 .start = raw_seq_start,
971 .next = raw_seq_next,
972 .stop = raw_seq_stop,
973 .show = raw_seq_show,
974};
975
976int raw_seq_open(struct inode *ino, struct file *file,
977 struct raw_hashinfo *h, const struct seq_operations *ops)
978{
979 int err;
980 struct raw_iter_state *i;
981
982 err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state));
983 if (err < 0)
984 return err;
985
986 i = raw_seq_private((struct seq_file *)file->private_data);
987 i->h = h;
988 return 0;
989}
990EXPORT_SYMBOL_GPL(raw_seq_open);
991
992static int raw_v4_seq_open(struct inode *inode, struct file *file)
993{
994 return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops);
995}
996
997static const struct file_operations raw_seq_fops = {
998 .owner = THIS_MODULE,
999 .open = raw_v4_seq_open,
1000 .read = seq_read,
1001 .llseek = seq_lseek,
1002 .release = seq_release_net,
1003};
1004
1005static __net_init int raw_init_net(struct net *net)
1006{
1007 if (!proc_net_fops_create(net, "raw", S_IRUGO, &raw_seq_fops))
1008 return -ENOMEM;
1009
1010 return 0;
1011}
1012
1013static __net_exit void raw_exit_net(struct net *net)
1014{
1015 proc_net_remove(net, "raw");
1016}
1017
1018static __net_initdata struct pernet_operations raw_net_ops = {
1019 .init = raw_init_net,
1020 .exit = raw_exit_net,
1021};
1022
1023int __init raw_proc_init(void)
1024{
1025 return register_pernet_subsys(&raw_net_ops);
1026}
1027
1028void __init raw_proc_exit(void)
1029{
1030 unregister_pernet_subsys(&raw_net_ops);
1031}
1032#endif
1033
