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e7e091d365fffb1630782dba6ca659921cb0a411
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv4 / raw.c
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * RAW - implementation of IP "raw" sockets.
7 *
8 * Version: $Id: raw.c,v 1.64 2002/02/01 22:01:04 davem Exp $
9 *
10 * Authors: Ross Biro
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 *
13 * Fixes:
14 * Alan Cox : verify_area() fixed up
15 * Alan Cox : ICMP error handling
16 * Alan Cox : EMSGSIZE if you send too big a packet
17 * Alan Cox : Now uses generic datagrams and shared
18 * skbuff library. No more peek crashes,
19 * no more backlogs
20 * Alan Cox : Checks sk->broadcast.
21 * Alan Cox : Uses skb_free_datagram/skb_copy_datagram
22 * Alan Cox : Raw passes ip options too
23 * Alan Cox : Setsocketopt added
24 * Alan Cox : Fixed error return for broadcasts
25 * Alan Cox : Removed wake_up calls
26 * Alan Cox : Use ttl/tos
27 * Alan Cox : Cleaned up old debugging
28 * Alan Cox : Use new kernel side addresses
29 * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets.
30 * Alan Cox : BSD style RAW socket demultiplexing.
31 * Alan Cox : Beginnings of mrouted support.
32 * Alan Cox : Added IP_HDRINCL option.
33 * Alan Cox : Skip broadcast check if BSDism set.
34 * David S. Miller : New socket lookup architecture.
35 *
36 * This program is free software; you can redistribute it and/or
37 * modify it under the terms of the GNU General Public License
38 * as published by the Free Software Foundation; either version
39 * 2 of the License, or (at your option) any later version.
40 */
41
42 #include <linux/types.h>
43 #include <asm/atomic.h>
44 #include <asm/byteorder.h>
45 #include <asm/current.h>
46 #include <asm/uaccess.h>
47 #include <asm/ioctls.h>
48 #include <linux/stddef.h>
49 #include <linux/slab.h>
50 #include <linux/errno.h>
51 #include <linux/aio.h>
52 #include <linux/kernel.h>
53 #include <linux/spinlock.h>
54 #include <linux/sockios.h>
55 #include <linux/socket.h>
56 #include <linux/in.h>
57 #include <linux/mroute.h>
58 #include <linux/netdevice.h>
59 #include <linux/in_route.h>
60 #include <linux/route.h>
61 #include <linux/skbuff.h>
62 #include <net/net_namespace.h>
63 #include <net/dst.h>
64 #include <net/sock.h>
65 #include <linux/gfp.h>
66 #include <linux/ip.h>
67 #include <linux/net.h>
68 #include <net/ip.h>
69 #include <net/icmp.h>
70 #include <net/udp.h>
71 #include <net/raw.h>
72 #include <net/snmp.h>
73 #include <net/tcp_states.h>
74 #include <net/inet_common.h>
75 #include <net/checksum.h>
76 #include <net/xfrm.h>
77 #include <linux/rtnetlink.h>
78 #include <linux/proc_fs.h>
79 #include <linux/seq_file.h>
80 #include <linux/netfilter.h>
81 #include <linux/netfilter_ipv4.h>
82
83 static struct raw_hashinfo raw_v4_hashinfo = {
84 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
85 };
86
87 void raw_hash_sk(struct sock *sk)
88 {
89 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
90 struct hlist_head *head;
91
92 head = &h->ht[inet_sk(sk)->num & (RAW_HTABLE_SIZE - 1)];
93
94 write_lock_bh(&h->lock);
95 sk_add_node(sk, head);
96 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
97 write_unlock_bh(&h->lock);
98 }
99 EXPORT_SYMBOL_GPL(raw_hash_sk);
100
101 void raw_unhash_sk(struct sock *sk)
102 {
103 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
104
105 write_lock_bh(&h->lock);
106 if (sk_del_node_init(sk))
107 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
108 write_unlock_bh(&h->lock);
109 }
110 EXPORT_SYMBOL_GPL(raw_unhash_sk);
111
112 static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk,
113 unsigned short num, __be32 raddr, __be32 laddr, int dif)
114 {
115 struct hlist_node *node;
116
117 sk_for_each_from(sk, node) {
118 struct inet_sock *inet = inet_sk(sk);
119
120 if (net_eq(sock_net(sk), net) && inet->num == num &&
121 !(inet->daddr && inet->daddr != raddr) &&
122 !(inet->rcv_saddr && inet->rcv_saddr != laddr) &&
123 !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
124 goto found; /* gotcha */
125 }
126 sk = NULL;
127 found:
128 return sk;
129 }
130
131 /*
132 * 0 - deliver
133 * 1 - block
134 */
135 static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb)
136 {
137 int type;
138
139 if (!pskb_may_pull(skb, sizeof(struct icmphdr)))
140 return 1;
141
142 type = icmp_hdr(skb)->type;
143 if (type < 32) {
144 __u32 data = raw_sk(sk)->filter.data;
145
146 return ((1 << type) & data) != 0;
147 }
148
149 /* Do not block unknown ICMP types */
150 return 0;
151 }
152
153 /* IP input processing comes here for RAW socket delivery.
154 * Caller owns SKB, so we must make clones.
155 *
156 * RFC 1122: SHOULD pass TOS value up to the transport layer.
157 * -> It does. And not only TOS, but all IP header.
158 */
159 static int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
160 {
161 struct sock *sk;
162 struct hlist_head *head;
163 int delivered = 0;
164 struct net *net;
165
166 read_lock(&raw_v4_hashinfo.lock);
167 head = &raw_v4_hashinfo.ht[hash];
168 if (hlist_empty(head))
169 goto out;
170
171 net = dev_net(skb->dev);
172 sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol,
173 iph->saddr, iph->daddr,
174 skb->dev->ifindex);
175
176 while (sk) {
177 delivered = 1;
178 if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) {
179 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
180
181 /* Not releasing hash table! */
182 if (clone)
183 raw_rcv(sk, clone);
184 }
185 sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol,
186 iph->saddr, iph->daddr,
187 skb->dev->ifindex);
188 }
189 out:
190 read_unlock(&raw_v4_hashinfo.lock);
191 return delivered;
192 }
193
194 int raw_local_deliver(struct sk_buff *skb, int protocol)
195 {
196 int hash;
197 struct sock *raw_sk;
198
199 hash = protocol & (RAW_HTABLE_SIZE - 1);
200 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
201
202 /* If there maybe a raw socket we must check - if not we
203 * don't care less
204 */
205 if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash))
206 raw_sk = NULL;
207
208 return raw_sk != NULL;
209
210 }
211
212 static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
213 {
214 struct inet_sock *inet = inet_sk(sk);
215 const int type = icmp_hdr(skb)->type;
216 const int code = icmp_hdr(skb)->code;
217 int err = 0;
218 int harderr = 0;
219
220 /* Report error on raw socket, if:
221 1. User requested ip_recverr.
222 2. Socket is connected (otherwise the error indication
223 is useless without ip_recverr and error is hard.
224 */
225 if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED)
226 return;
227
228 switch (type) {
229 default:
230 case ICMP_TIME_EXCEEDED:
231 err = EHOSTUNREACH;
232 break;
233 case ICMP_SOURCE_QUENCH:
234 return;
235 case ICMP_PARAMETERPROB:
236 err = EPROTO;
237 harderr = 1;
238 break;
239 case ICMP_DEST_UNREACH:
240 err = EHOSTUNREACH;
241 if (code > NR_ICMP_UNREACH)
242 break;
243 err = icmp_err_convert[code].errno;
244 harderr = icmp_err_convert[code].fatal;
245 if (code == ICMP_FRAG_NEEDED) {
246 harderr = inet->pmtudisc != IP_PMTUDISC_DONT;
247 err = EMSGSIZE;
248 }
249 }
250
251 if (inet->recverr) {
252 struct iphdr *iph = (struct iphdr*)skb->data;
253 u8 *payload = skb->data + (iph->ihl << 2);
254
255 if (inet->hdrincl)
256 payload = skb->data;
257 ip_icmp_error(sk, skb, err, 0, info, payload);
258 }
259
260 if (inet->recverr || harderr) {
261 sk->sk_err = err;
262 sk->sk_error_report(sk);
263 }
264 }
265
266 void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
267 {
268 int hash;
269 struct sock *raw_sk;
270 struct iphdr *iph;
271 struct net *net;
272
273 hash = protocol & (RAW_HTABLE_SIZE - 1);
274
275 read_lock(&raw_v4_hashinfo.lock);
276 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
277 if (raw_sk != NULL) {
278 iph = (struct iphdr *)skb->data;
279 net = dev_net(skb->dev);
280
281 while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
282 iph->daddr, iph->saddr,
283 skb->dev->ifindex)) != NULL) {
284 raw_err(raw_sk, skb, info);
285 raw_sk = sk_next(raw_sk);
286 iph = (struct iphdr *)skb->data;
287 }
288 }
289 read_unlock(&raw_v4_hashinfo.lock);
290 }
291
292 static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb)
293 {
294 /* Charge it to the socket. */
295
296 if (sock_queue_rcv_skb(sk, skb) < 0) {
297 atomic_inc(&sk->sk_drops);
298 kfree_skb(skb);
299 return NET_RX_DROP;
300 }
301
302 return NET_RX_SUCCESS;
303 }
304
305 int raw_rcv(struct sock *sk, struct sk_buff *skb)
306 {
307 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
308 atomic_inc(&sk->sk_drops);
309 kfree_skb(skb);
310 return NET_RX_DROP;
311 }
312 nf_reset(skb);
313
314 skb_push(skb, skb->data - skb_network_header(skb));
315
316 raw_rcv_skb(sk, skb);
317 return 0;
318 }
319
320 static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
321 struct rtable *rt,
322 unsigned int flags)
323 {
324 struct inet_sock *inet = inet_sk(sk);
325 struct iphdr *iph;
326 struct sk_buff *skb;
327 unsigned int iphlen;
328 int err;
329
330 if (length > rt->u.dst.dev->mtu) {
331 ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->dport,
332 rt->u.dst.dev->mtu);
333 return -EMSGSIZE;
334 }
335 if (flags&MSG_PROBE)
336 goto out;
337
338 skb = sock_alloc_send_skb(sk,
339 length + LL_ALLOCATED_SPACE(rt->u.dst.dev) + 15,
340 flags & MSG_DONTWAIT, &err);
341 if (skb == NULL)
342 goto error;
343 skb_reserve(skb, LL_RESERVED_SPACE(rt->u.dst.dev));
344
345 skb->priority = sk->sk_priority;
346 skb->mark = sk->sk_mark;
347 skb->dst = dst_clone(&rt->u.dst);
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 = memcpy_fromiovecend((void *)iph, from, 0, length);
357 if (err)
358 goto error_fault;
359
360 /* We don't modify invalid header */
361 iphlen = iph->ihl * 4;
362 if (iphlen >= sizeof(*iph) && iphlen <= length) {
363 if (!iph->saddr)
364 iph->saddr = rt->rt_src;
365 iph->check = 0;
366 iph->tot_len = htons(length);
367 if (!iph->id)
368 ip_select_ident(iph, &rt->u.dst, NULL);
369
370 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
371 }
372 if (iph->protocol == IPPROTO_ICMP)
373 icmp_out_count(((struct icmphdr *)
374 skb_transport_header(skb))->type);
375
376 err = NF_HOOK(PF_INET, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
377 dst_output);
378 if (err > 0)
379 err = inet->recverr ? net_xmit_errno(err) : 0;
380 if (err)
381 goto error;
382 out:
383 return 0;
384
385 error_fault:
386 err = -EFAULT;
387 kfree_skb(skb);
388 error:
389 IP_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
390 return err;
391 }
392
393 static int raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
394 {
395 struct iovec *iov;
396 u8 __user *type = NULL;
397 u8 __user *code = NULL;
398 int probed = 0;
399 unsigned int i;
400
401 if (!msg->msg_iov)
402 return 0;
403
404 for (i = 0; i < msg->msg_iovlen; i++) {
405 iov = &msg->msg_iov[i];
406 if (!iov)
407 continue;
408
409 switch (fl->proto) {
410 case IPPROTO_ICMP:
411 /* check if one-byte field is readable or not. */
412 if (iov->iov_base && iov->iov_len < 1)
413 break;
414
415 if (!type) {
416 type = iov->iov_base;
417 /* check if code field is readable or not. */
418 if (iov->iov_len > 1)
419 code = type + 1;
420 } else if (!code)
421 code = iov->iov_base;
422
423 if (type && code) {
424 if (get_user(fl->fl_icmp_type, type) ||
425 get_user(fl->fl_icmp_code, code))
426 return -EFAULT;
427 probed = 1;
428 }
429 break;
430 default:
431 probed = 1;
432 break;
433 }
434 if (probed)
435 break;
436 }
437 return 0;
438 }
439
440 static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
441 size_t len)
442 {
443 struct inet_sock *inet = inet_sk(sk);
444 struct ipcm_cookie ipc;
445 struct rtable *rt = NULL;
446 int free = 0;
447 __be32 daddr;
448 __be32 saddr;
449 u8 tos;
450 int err;
451
452 err = -EMSGSIZE;
453 if (len > 0xFFFF)
454 goto out;
455
456 /*
457 * Check the flags.
458 */
459
460 err = -EOPNOTSUPP;
461 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
462 goto out; /* compatibility */
463
464 /*
465 * Get and verify the address.
466 */
467
468 if (msg->msg_namelen) {
469 struct sockaddr_in *usin = (struct sockaddr_in*)msg->msg_name;
470 err = -EINVAL;
471 if (msg->msg_namelen < sizeof(*usin))
472 goto out;
473 if (usin->sin_family != AF_INET) {
474 static int complained;
475 if (!complained++)
476 printk(KERN_INFO "%s forgot to set AF_INET in "
477 "raw sendmsg. Fix it!\n",
478 current->comm);
479 err = -EAFNOSUPPORT;
480 if (usin->sin_family)
481 goto out;
482 }
483 daddr = usin->sin_addr.s_addr;
484 /* ANK: I did not forget to get protocol from port field.
485 * I just do not know, who uses this weirdness.
486 * IP_HDRINCL is much more convenient.
487 */
488 } else {
489 err = -EDESTADDRREQ;
490 if (sk->sk_state != TCP_ESTABLISHED)
491 goto out;
492 daddr = inet->daddr;
493 }
494
495 ipc.addr = inet->saddr;
496 ipc.opt = NULL;
497 ipc.oif = sk->sk_bound_dev_if;
498
499 if (msg->msg_controllen) {
500 err = ip_cmsg_send(sock_net(sk), msg, &ipc);
501 if (err)
502 goto out;
503 if (ipc.opt)
504 free = 1;
505 }
506
507 saddr = ipc.addr;
508 ipc.addr = daddr;
509
510 if (!ipc.opt)
511 ipc.opt = inet->opt;
512
513 if (ipc.opt) {
514 err = -EINVAL;
515 /* Linux does not mangle headers on raw sockets,
516 * so that IP options + IP_HDRINCL is non-sense.
517 */
518 if (inet->hdrincl)
519 goto done;
520 if (ipc.opt->srr) {
521 if (!daddr)
522 goto done;
523 daddr = ipc.opt->faddr;
524 }
525 }
526 tos = RT_CONN_FLAGS(sk);
527 if (msg->msg_flags & MSG_DONTROUTE)
528 tos |= RTO_ONLINK;
529
530 if (ipv4_is_multicast(daddr)) {
531 if (!ipc.oif)
532 ipc.oif = inet->mc_index;
533 if (!saddr)
534 saddr = inet->mc_addr;
535 }
536
537 {
538 struct flowi fl = { .oif = ipc.oif,
539 .mark = sk->sk_mark,
540 .nl_u = { .ip4_u =
541 { .daddr = daddr,
542 .saddr = saddr,
543 .tos = tos } },
544 .proto = inet->hdrincl ? IPPROTO_RAW :
545 sk->sk_protocol,
546 };
547 if (!inet->hdrincl) {
548 err = raw_probe_proto_opt(&fl, msg);
549 if (err)
550 goto done;
551 }
552
553 security_sk_classify_flow(sk, &fl);
554 err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 1);
555 }
556 if (err)
557 goto done;
558
559 err = -EACCES;
560 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
561 goto done;
562
563 if (msg->msg_flags & MSG_CONFIRM)
564 goto do_confirm;
565 back_from_confirm:
566
567 if (inet->hdrincl)
568 err = raw_send_hdrinc(sk, msg->msg_iov, len,
569 rt, msg->msg_flags);
570
571 else {
572 if (!ipc.addr)
573 ipc.addr = rt->rt_dst;
574 lock_sock(sk);
575 err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
576 &ipc, rt, msg->msg_flags);
577 if (err)
578 ip_flush_pending_frames(sk);
579 else if (!(msg->msg_flags & MSG_MORE))
580 err = ip_push_pending_frames(sk);
581 release_sock(sk);
582 }
583 done:
584 if (free)
585 kfree(ipc.opt);
586 ip_rt_put(rt);
587
588 out:
589 if (err < 0)
590 return err;
591 return len;
592
593 do_confirm:
594 dst_confirm(&rt->u.dst);
595 if (!(msg->msg_flags & MSG_PROBE) || len)
596 goto back_from_confirm;
597 err = 0;
598 goto done;
599 }
600
601 static void raw_close(struct sock *sk, long timeout)
602 {
603 /*
604 * Raw sockets may have direct kernel refereneces. Kill them.
605 */
606 ip_ra_control(sk, 0, NULL);
607
608 sk_common_release(sk);
609 }
610
611 static int raw_destroy(struct sock *sk)
612 {
613 lock_sock(sk);
614 ip_flush_pending_frames(sk);
615 release_sock(sk);
616 return 0;
617 }
618
619 /* This gets rid of all the nasties in af_inet. -DaveM */
620 static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
621 {
622 struct inet_sock *inet = inet_sk(sk);
623 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
624 int ret = -EINVAL;
625 int chk_addr_ret;
626
627 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
628 goto out;
629 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
630 ret = -EADDRNOTAVAIL;
631 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
632 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
633 goto out;
634 inet->rcv_saddr = inet->saddr = addr->sin_addr.s_addr;
635 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
636 inet->saddr = 0; /* Use device */
637 sk_dst_reset(sk);
638 ret = 0;
639 out: return ret;
640 }
641
642 /*
643 * This should be easy, if there is something there
644 * we return it, otherwise we block.
645 */
646
647 static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
648 size_t len, int noblock, int flags, int *addr_len)
649 {
650 struct inet_sock *inet = inet_sk(sk);
651 size_t copied = 0;
652 int err = -EOPNOTSUPP;
653 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
654 struct sk_buff *skb;
655
656 if (flags & MSG_OOB)
657 goto out;
658
659 if (addr_len)
660 *addr_len = sizeof(*sin);
661
662 if (flags & MSG_ERRQUEUE) {
663 err = ip_recv_error(sk, msg, len);
664 goto out;
665 }
666
667 skb = skb_recv_datagram(sk, flags, noblock, &err);
668 if (!skb)
669 goto out;
670
671 copied = skb->len;
672 if (len < copied) {
673 msg->msg_flags |= MSG_TRUNC;
674 copied = len;
675 }
676
677 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
678 if (err)
679 goto done;
680
681 sock_recv_timestamp(msg, sk, skb);
682
683 /* Copy the address. */
684 if (sin) {
685 sin->sin_family = AF_INET;
686 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
687 sin->sin_port = 0;
688 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
689 }
690 if (inet->cmsg_flags)
691 ip_cmsg_recv(msg, skb);
692 if (flags & MSG_TRUNC)
693 copied = skb->len;
694 done:
695 skb_free_datagram(sk, skb);
696 out:
697 if (err)
698 return err;
699 return copied;
700 }
701
702 static int raw_init(struct sock *sk)
703 {
704 struct raw_sock *rp = raw_sk(sk);
705
706 if (inet_sk(sk)->num == IPPROTO_ICMP)
707 memset(&rp->filter, 0, sizeof(rp->filter));
708 return 0;
709 }
710
711 static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
712 {
713 if (optlen > sizeof(struct icmp_filter))
714 optlen = sizeof(struct icmp_filter);
715 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
716 return -EFAULT;
717 return 0;
718 }
719
720 static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
721 {
722 int len, ret = -EFAULT;
723
724 if (get_user(len, optlen))
725 goto out;
726 ret = -EINVAL;
727 if (len < 0)
728 goto out;
729 if (len > sizeof(struct icmp_filter))
730 len = sizeof(struct icmp_filter);
731 ret = -EFAULT;
732 if (put_user(len, optlen) ||
733 copy_to_user(optval, &raw_sk(sk)->filter, len))
734 goto out;
735 ret = 0;
736 out: return ret;
737 }
738
739 static int do_raw_setsockopt(struct sock *sk, int level, int optname,
740 char __user *optval, int optlen)
741 {
742 if (optname == ICMP_FILTER) {
743 if (inet_sk(sk)->num != IPPROTO_ICMP)
744 return -EOPNOTSUPP;
745 else
746 return raw_seticmpfilter(sk, optval, optlen);
747 }
748 return -ENOPROTOOPT;
749 }
750
751 static int raw_setsockopt(struct sock *sk, int level, int optname,
752 char __user *optval, int optlen)
753 {
754 if (level != SOL_RAW)
755 return ip_setsockopt(sk, level, optname, optval, optlen);
756 return do_raw_setsockopt(sk, level, optname, optval, optlen);
757 }
758
759 #ifdef CONFIG_COMPAT
760 static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
761 char __user *optval, int optlen)
762 {
763 if (level != SOL_RAW)
764 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
765 return do_raw_setsockopt(sk, level, optname, optval, optlen);
766 }
767 #endif
768
769 static int do_raw_getsockopt(struct sock *sk, int level, int optname,
770 char __user *optval, int __user *optlen)
771 {
772 if (optname == ICMP_FILTER) {
773 if (inet_sk(sk)->num != IPPROTO_ICMP)
774 return -EOPNOTSUPP;
775 else
776 return raw_geticmpfilter(sk, optval, optlen);
777 }
778 return -ENOPROTOOPT;
779 }
780
781 static int raw_getsockopt(struct sock *sk, int level, int optname,
782 char __user *optval, int __user *optlen)
783 {
784 if (level != SOL_RAW)
785 return ip_getsockopt(sk, level, optname, optval, optlen);
786 return do_raw_getsockopt(sk, level, optname, optval, optlen);
787 }
788
789 #ifdef CONFIG_COMPAT
790 static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
791 char __user *optval, int __user *optlen)
792 {
793 if (level != SOL_RAW)
794 return compat_ip_getsockopt(sk, level, optname, optval, optlen);
795 return do_raw_getsockopt(sk, level, optname, optval, optlen);
796 }
797 #endif
798
799 static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
800 {
801 switch (cmd) {
802 case SIOCOUTQ: {
803 int amount = atomic_read(&sk->sk_wmem_alloc);
804 return put_user(amount, (int __user *)arg);
805 }
806 case SIOCINQ: {
807 struct sk_buff *skb;
808 int amount = 0;
809
810 spin_lock_bh(&sk->sk_receive_queue.lock);
811 skb = skb_peek(&sk->sk_receive_queue);
812 if (skb != NULL)
813 amount = skb->len;
814 spin_unlock_bh(&sk->sk_receive_queue.lock);
815 return put_user(amount, (int __user *)arg);
816 }
817
818 default:
819 #ifdef CONFIG_IP_MROUTE
820 return ipmr_ioctl(sk, cmd, (void __user *)arg);
821 #else
822 return -ENOIOCTLCMD;
823 #endif
824 }
825 }
826
827 struct proto raw_prot = {
828 .name = "RAW",
829 .owner = THIS_MODULE,
830 .close = raw_close,
831 .destroy = raw_destroy,
832 .connect = ip4_datagram_connect,
833 .disconnect = udp_disconnect,
834 .ioctl = raw_ioctl,
835 .init = raw_init,
836 .setsockopt = raw_setsockopt,
837 .getsockopt = raw_getsockopt,
838 .sendmsg = raw_sendmsg,
839 .recvmsg = raw_recvmsg,
840 .bind = raw_bind,
841 .backlog_rcv = raw_rcv_skb,
842 .hash = raw_hash_sk,
843 .unhash = raw_unhash_sk,
844 .obj_size = sizeof(struct raw_sock),
845 .h.raw_hash = &raw_v4_hashinfo,
846 #ifdef CONFIG_COMPAT
847 .compat_setsockopt = compat_raw_setsockopt,
848 .compat_getsockopt = compat_raw_getsockopt,
849 #endif
850 };
851
852 #ifdef CONFIG_PROC_FS
853 static struct sock *raw_get_first(struct seq_file *seq)
854 {
855 struct sock *sk;
856 struct raw_iter_state* state = raw_seq_private(seq);
857
858 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
859 ++state->bucket) {
860 struct hlist_node *node;
861
862 sk_for_each(sk, node, &state->h->ht[state->bucket])
863 if (sock_net(sk) == seq_file_net(seq))
864 goto found;
865 }
866 sk = NULL;
867 found:
868 return sk;
869 }
870
871 static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
872 {
873 struct raw_iter_state* state = raw_seq_private(seq);
874
875 do {
876 sk = sk_next(sk);
877 try_again:
878 ;
879 } while (sk && sock_net(sk) != seq_file_net(seq));
880
881 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
882 sk = sk_head(&state->h->ht[state->bucket]);
883 goto try_again;
884 }
885 return sk;
886 }
887
888 static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
889 {
890 struct sock *sk = raw_get_first(seq);
891
892 if (sk)
893 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
894 --pos;
895 return pos ? NULL : sk;
896 }
897
898 void *raw_seq_start(struct seq_file *seq, loff_t *pos)
899 {
900 struct raw_iter_state *state = raw_seq_private(seq);
901
902 read_lock(&state->h->lock);
903 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
904 }
905 EXPORT_SYMBOL_GPL(raw_seq_start);
906
907 void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
908 {
909 struct sock *sk;
910
911 if (v == SEQ_START_TOKEN)
912 sk = raw_get_first(seq);
913 else
914 sk = raw_get_next(seq, v);
915 ++*pos;
916 return sk;
917 }
918 EXPORT_SYMBOL_GPL(raw_seq_next);
919
920 void raw_seq_stop(struct seq_file *seq, void *v)
921 {
922 struct raw_iter_state *state = raw_seq_private(seq);
923
924 read_unlock(&state->h->lock);
925 }
926 EXPORT_SYMBOL_GPL(raw_seq_stop);
927
928 static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
929 {
930 struct inet_sock *inet = inet_sk(sp);
931 __be32 dest = inet->daddr,
932 src = inet->rcv_saddr;
933 __u16 destp = 0,
934 srcp = inet->num;
935
936 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
937 " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d",
938 i, src, srcp, dest, destp, sp->sk_state,
939 atomic_read(&sp->sk_wmem_alloc),
940 atomic_read(&sp->sk_rmem_alloc),
941 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
942 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
943 }
944
945 static int raw_seq_show(struct seq_file *seq, void *v)
946 {
947 if (v == SEQ_START_TOKEN)
948 seq_printf(seq, " sl local_address rem_address st tx_queue "
949 "rx_queue tr tm->when retrnsmt uid timeout "
950 "inode drops\n");
951 else
952 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
953 return 0;
954 }
955
956 static const struct seq_operations raw_seq_ops = {
957 .start = raw_seq_start,
958 .next = raw_seq_next,
959 .stop = raw_seq_stop,
960 .show = raw_seq_show,
961 };
962
963 int raw_seq_open(struct inode *ino, struct file *file,
964 struct raw_hashinfo *h, const struct seq_operations *ops)
965 {
966 int err;
967 struct raw_iter_state *i;
968
969 err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state));
970 if (err < 0)
971 return err;
972
973 i = raw_seq_private((struct seq_file *)file->private_data);
974 i->h = h;
975 return 0;
976 }
977 EXPORT_SYMBOL_GPL(raw_seq_open);
978
979 static int raw_v4_seq_open(struct inode *inode, struct file *file)
980 {
981 return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops);
982 }
983
984 static const struct file_operations raw_seq_fops = {
985 .owner = THIS_MODULE,
986 .open = raw_v4_seq_open,
987 .read = seq_read,
988 .llseek = seq_lseek,
989 .release = seq_release_net,
990 };
991
992 static __net_init int raw_init_net(struct net *net)
993 {
994 if (!proc_net_fops_create(net, "raw", S_IRUGO, &raw_seq_fops))
995 return -ENOMEM;
996
997 return 0;
998 }
999
1000 static __net_exit void raw_exit_net(struct net *net)
1001 {
1002 proc_net_remove(net, "raw");
1003 }
1004
1005 static __net_initdata struct pernet_operations raw_net_ops = {
1006 .init = raw_init_net,
1007 .exit = raw_exit_net,
1008 };
1009
1010 int __init raw_proc_init(void)
1011 {
1012 return register_pernet_subsys(&raw_net_ops);
1013 }
1014
1015 void __init raw_proc_exit(void)
1016 {
1017 unregister_pernet_subsys(&raw_net_ops);
1018 }
1019 #endif /* CONFIG_PROC_FS */
kernel source for telekom puls (alcatel/mediatek)