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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / net / ipv4 / raw.c
blob009a7b2aa1ef0493f542b4745b334e2964c0b826
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 * Authors: Ross Biro
9 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
10 *
11 * Fixes:
12 * Alan Cox : verify_area() fixed up
13 * Alan Cox : ICMP error handling
14 * Alan Cox : EMSGSIZE if you send too big a packet
15 * Alan Cox : Now uses generic datagrams and shared
16 * skbuff library. No more peek crashes,
17 * no more backlogs
18 * Alan Cox : Checks sk->broadcast.
19 * Alan Cox : Uses skb_free_datagram/skb_copy_datagram
20 * Alan Cox : Raw passes ip options too
21 * Alan Cox : Setsocketopt added
22 * Alan Cox : Fixed error return for broadcasts
23 * Alan Cox : Removed wake_up calls
24 * Alan Cox : Use ttl/tos
25 * Alan Cox : Cleaned up old debugging
26 * Alan Cox : Use new kernel side addresses
27 * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets.
28 * Alan Cox : BSD style RAW socket demultiplexing.
29 * Alan Cox : Beginnings of mrouted support.
30 * Alan Cox : Added IP_HDRINCL option.
31 * Alan Cox : Skip broadcast check if BSDism set.
32 * David S. Miller : New socket lookup architecture.
33 *
34 * This program is free software; you can redistribute it and/or
35 * modify it under the terms of the GNU General Public License
36 * as published by the Free Software Foundation; either version
37 * 2 of the License, or (at your option) any later version.
38 */
39
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
80 static struct raw_hashinfo raw_v4_hashinfo = {
81 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
82 };
83
84 void 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 }
96 EXPORT_SYMBOL_GPL(raw_hash_sk);
97
98 void 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 }
107 EXPORT_SYMBOL_GPL(raw_unhash_sk);
108
109 static 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; /* gotcha */
122 }
123 sk = NULL;
124 found:
125 return sk;
126 }
127
128 /*
129 * 0 - deliver
130 * 1 - block
131 */
132 static __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 /* Do not block unknown ICMP types */
147 return 0;
148 }
149
150 /* IP input processing comes here for RAW socket delivery.
151 * Caller owns SKB, so we must make clones.
152 *
153 * RFC 1122: SHOULD pass TOS value up to the transport layer.
154 * -> It does. And not only TOS, but all IP header.
155 */
156 static 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 /* Not releasing hash table! */
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 }
186 out:
187 read_unlock(&raw_v4_hashinfo.lock);
188 return delivered;
189 }
190
191 int 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 /* If there maybe a raw socket we must check - if not we
200 * don't care less
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
209 static 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 /* Report error on raw socket, if:
218 1. User requested ip_recverr.
219 2. Socket is connected (otherwise the error indication
220 is useless without ip_recverr and error is hard.
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
263 void 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
289 static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb)
290 {
291 /* Charge it to the socket. */
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
301 int 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
316 static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
317 struct rtable **rtp,
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 struct rtable *rt = *rtp;
327
328 if (length > rt->dst.dev->mtu) {
329 ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->inet_dport,
330 rt->dst.dev->mtu);
331 return -EMSGSIZE;
332 }
333 if (flags&MSG_PROBE)
334 goto out;
335
336 skb = sock_alloc_send_skb(sk,
337 length + LL_ALLOCATED_SPACE(rt->dst.dev) + 15,
338 flags & MSG_DONTWAIT, &err);
339 if (skb == NULL)
340 goto error;
341 skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev));
342
343 skb->priority = sk->sk_priority;
344 skb->mark = sk->sk_mark;
345 skb_dst_set(skb, &rt->dst);
346 *rtp = NULL;
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 = -EFAULT;
356 if (memcpy_fromiovecend((void *)iph, from, 0, length))
357 goto error_free;
358
359 iphlen = iph->ihl * 4;
360
361 /*
362 * We don't want to modify the ip header, but we do need to
363 * be sure that it won't cause problems later along the network
364 * stack. Specifically we want to make sure that iph->ihl is a
365 * sane value. If ihl points beyond the length of the buffer passed
366 * in, reject the frame as invalid
367 */
368 err = -EINVAL;
369 if (iphlen > length)
370 goto error_free;
371
372 if (iphlen >= sizeof(*iph)) {
373 if (!iph->saddr)
374 iph->saddr = rt->rt_src;
375 iph->check = 0;
376 iph->tot_len = htons(length);
377 if (!iph->id)
378 ip_select_ident(iph, &rt->dst, NULL);
379
380 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
381 }
382 if (iph->protocol == IPPROTO_ICMP)
383 icmp_out_count(net, ((struct icmphdr *)
384 skb_transport_header(skb))->type);
385
386 err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL,
387 rt->dst.dev, dst_output);
388 if (err > 0)
389 err = net_xmit_errno(err);
390 if (err)
391 goto error;
392 out:
393 return 0;
394
395 error_free:
396 kfree_skb(skb);
397 error:
398 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
399 if (err == -ENOBUFS && !inet->recverr)
400 err = 0;
401 return err;
402 }
403
404 static int raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
405 {
406 struct iovec *iov;
407 u8 __user *type = NULL;
408 u8 __user *code = NULL;
409 int probed = 0;
410 unsigned int i;
411
412 if (!msg->msg_iov)
413 return 0;
414
415 for (i = 0; i < msg->msg_iovlen; i++) {
416 iov = &msg->msg_iov[i];
417 if (!iov)
418 continue;
419
420 switch (fl->proto) {
421 case IPPROTO_ICMP:
422 /* check if one-byte field is readable or not. */
423 if (iov->iov_base && iov->iov_len < 1)
424 break;
425
426 if (!type) {
427 type = iov->iov_base;
428 /* check if code field is readable or not. */
429 if (iov->iov_len > 1)
430 code = type + 1;
431 } else if (!code)
432 code = iov->iov_base;
433
434 if (type && code) {
435 if (get_user(fl->fl_icmp_type, type) ||
436 get_user(fl->fl_icmp_code, code))
437 return -EFAULT;
438 probed = 1;
439 }
440 break;
441 default:
442 probed = 1;
443 break;
444 }
445 if (probed)
446 break;
447 }
448 return 0;
449 }
450
451 static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
452 size_t len)
453 {
454 struct inet_sock *inet = inet_sk(sk);
455 struct ipcm_cookie ipc;
456 struct rtable *rt = NULL;
457 int free = 0;
458 __be32 daddr;
459 __be32 saddr;
460 u8 tos;
461 int err;
462
463 err = -EMSGSIZE;
464 if (len > 0xFFFF)
465 goto out;
466
467 /*
468 * Check the flags.
469 */
470
471 err = -EOPNOTSUPP;
472 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
473 goto out; /* compatibility */
474
475 /*
476 * Get and verify the address.
477 */
478
479 if (msg->msg_namelen) {
480 struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name;
481 err = -EINVAL;
482 if (msg->msg_namelen < sizeof(*usin))
483 goto out;
484 if (usin->sin_family != AF_INET) {
485 static int complained;
486 if (!complained++)
487 printk(KERN_INFO "%s forgot to set AF_INET in "
488 "raw sendmsg. Fix it!\n",
489 current->comm);
490 err = -EAFNOSUPPORT;
491 if (usin->sin_family)
492 goto out;
493 }
494 daddr = usin->sin_addr.s_addr;
495 /* ANK: I did not forget to get protocol from port field.
496 * I just do not know, who uses this weirdness.
497 * IP_HDRINCL is much more convenient.
498 */
499 } else {
500 err = -EDESTADDRREQ;
501 if (sk->sk_state != TCP_ESTABLISHED)
502 goto out;
503 daddr = inet->inet_daddr;
504 }
505
506 ipc.addr = inet->inet_saddr;
507 ipc.opt = NULL;
508 ipc.shtx.flags = 0;
509 ipc.oif = sk->sk_bound_dev_if;
510
511 if (msg->msg_controllen) {
512 err = ip_cmsg_send(sock_net(sk), msg, &ipc);
513 if (err)
514 goto out;
515 if (ipc.opt)
516 free = 1;
517 }
518
519 saddr = ipc.addr;
520 ipc.addr = daddr;
521
522 if (!ipc.opt)
523 ipc.opt = inet->opt;
524
525 if (ipc.opt) {
526 err = -EINVAL;
527 /* Linux does not mangle headers on raw sockets,
528 * so that IP options + IP_HDRINCL is non-sense.
529 */
530 if (inet->hdrincl)
531 goto done;
532 if (ipc.opt->srr) {
533 if (!daddr)
534 goto done;
535 daddr = ipc.opt->faddr;
536 }
537 }
538 tos = RT_CONN_FLAGS(sk);
539 if (msg->msg_flags & MSG_DONTROUTE)
540 tos |= RTO_ONLINK;
541
542 if (ipv4_is_multicast(daddr)) {
543 if (!ipc.oif)
544 ipc.oif = inet->mc_index;
545 if (!saddr)
546 saddr = inet->mc_addr;
547 }
548
549 {
550 struct flowi fl = { .oif = ipc.oif,
551 .mark = sk->sk_mark,
552 .nl_u = { .ip4_u =
553 { .daddr = daddr,
554 .saddr = saddr,
555 .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;
577 back_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 }
598 done:
599 if (free)
600 kfree(ipc.opt);
601 ip_rt_put(rt);
602
603 out:
604 if (err < 0)
605 return err;
606 return len;
607
608 do_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
616 static void raw_close(struct sock *sk, long timeout)
617 {
618 /*
619 * Raw sockets may have direct kernel refereneces. Kill them.
620 */
621 ip_ra_control(sk, 0, NULL);
622
623 sk_common_release(sk);
624 }
625
626 static void raw_destroy(struct sock *sk)
627 {
628 lock_sock(sk);
629 ip_flush_pending_frames(sk);
630 release_sock(sk);
631 }
632
633 /* This gets rid of all the nasties in af_inet. -DaveM */
634 static 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; /* Use device */
651 sk_dst_reset(sk);
652 ret = 0;
653 out: return ret;
654 }
655
656 /*
657 * This should be easy, if there is something there
658 * we return it, otherwise we block.
659 */
660
661 static 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 /* Copy the address. */
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;
708 done:
709 skb_free_datagram(sk, skb);
710 out:
711 if (err)
712 return err;
713 return copied;
714 }
715
716 static 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
725 static 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
734 static 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;
750 out: return ret;
751 }
752
753 static 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
765 static 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
774 static 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
783 static 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
795 static 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
804 static 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
813 static 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 struct proto raw_prot = {
843 .name = "RAW",
844 .owner = THIS_MODULE,
845 .close = raw_close,
846 .destroy = raw_destroy,
847 .connect = ip4_datagram_connect,
848 .disconnect = udp_disconnect,
849 .ioctl = raw_ioctl,
850 .init = raw_init,
851 .setsockopt = raw_setsockopt,
852 .getsockopt = raw_getsockopt,
853 .sendmsg = raw_sendmsg,
854 .recvmsg = raw_recvmsg,
855 .bind = raw_bind,
856 .backlog_rcv = raw_rcv_skb,
857 .hash = raw_hash_sk,
858 .unhash = raw_unhash_sk,
859 .obj_size = sizeof(struct raw_sock),
860 .h.raw_hash = &raw_v4_hashinfo,
861 #ifdef CONFIG_COMPAT
862 .compat_setsockopt = compat_raw_setsockopt,
863 .compat_getsockopt = compat_raw_getsockopt,
864 #endif
865 };
866
867 #ifdef CONFIG_PROC_FS
868 static struct sock *raw_get_first(struct seq_file *seq)
869 {
870 struct sock *sk;
871 struct raw_iter_state *state = raw_seq_private(seq);
872
873 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
874 ++state->bucket) {
875 struct hlist_node *node;
876
877 sk_for_each(sk, node, &state->h->ht[state->bucket])
878 if (sock_net(sk) == seq_file_net(seq))
879 goto found;
880 }
881 sk = NULL;
882 found:
883 return sk;
884 }
885
886 static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
887 {
888 struct raw_iter_state *state = raw_seq_private(seq);
889
890 do {
891 sk = sk_next(sk);
892 try_again:
893 ;
894 } while (sk && sock_net(sk) != seq_file_net(seq));
895
896 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
897 sk = sk_head(&state->h->ht[state->bucket]);
898 goto try_again;
899 }
900 return sk;
901 }
902
903 static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
904 {
905 struct sock *sk = raw_get_first(seq);
906
907 if (sk)
908 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
909 --pos;
910 return pos ? NULL : sk;
911 }
912
913 void *raw_seq_start(struct seq_file *seq, loff_t *pos)
914 {
915 struct raw_iter_state *state = raw_seq_private(seq);
916
917 read_lock(&state->h->lock);
918 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
919 }
920 EXPORT_SYMBOL_GPL(raw_seq_start);
921
922 void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
923 {
924 struct sock *sk;
925
926 if (v == SEQ_START_TOKEN)
927 sk = raw_get_first(seq);
928 else
929 sk = raw_get_next(seq, v);
930 ++*pos;
931 return sk;
932 }
933 EXPORT_SYMBOL_GPL(raw_seq_next);
934
935 void raw_seq_stop(struct seq_file *seq, void *v)
936 {
937 struct raw_iter_state *state = raw_seq_private(seq);
938
939 read_unlock(&state->h->lock);
940 }
941 EXPORT_SYMBOL_GPL(raw_seq_stop);
942
943 static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
944 {
945 struct inet_sock *inet = inet_sk(sp);
946 __be32 dest = inet->inet_daddr,
947 src = inet->inet_rcv_saddr;
948 __u16 destp = 0,
949 srcp = inet->inet_num;
950
951 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
952 " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n",
953 i, src, srcp, dest, destp, sp->sk_state,
954 sk_wmem_alloc_get(sp),
955 sk_rmem_alloc_get(sp),
956 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
957 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
958 }
959
960 static int raw_seq_show(struct seq_file *seq, void *v)
961 {
962 if (v == SEQ_START_TOKEN)
963 seq_printf(seq, " sl local_address rem_address st tx_queue "
964 "rx_queue tr tm->when retrnsmt uid timeout "
965 "inode ref pointer drops\n");
966 else
967 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
968 return 0;
969 }
970
971 static const struct seq_operations raw_seq_ops = {
972 .start = raw_seq_start,
973 .next = raw_seq_next,
974 .stop = raw_seq_stop,
975 .show = raw_seq_show,
976 };
977
978 int raw_seq_open(struct inode *ino, struct file *file,
979 struct raw_hashinfo *h, const struct seq_operations *ops)
980 {
981 int err;
982 struct raw_iter_state *i;
983
984 err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state));
985 if (err < 0)
986 return err;
987
988 i = raw_seq_private((struct seq_file *)file->private_data);
989 i->h = h;
990 return 0;
991 }
992 EXPORT_SYMBOL_GPL(raw_seq_open);
993
994 static int raw_v4_seq_open(struct inode *inode, struct file *file)
995 {
996 return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops);
997 }
998
999 static const struct file_operations raw_seq_fops = {
1000 .owner = THIS_MODULE,
1001 .open = raw_v4_seq_open,
1002 .read = seq_read,
1003 .llseek = seq_lseek,
1004 .release = seq_release_net,
1005 };
1006
1007 static __net_init int raw_init_net(struct net *net)
1008 {
1009 if (!proc_net_fops_create(net, "raw", S_IRUGO, &raw_seq_fops))
1010 return -ENOMEM;
1011
1012 return 0;
1013 }
1014
1015 static __net_exit void raw_exit_net(struct net *net)
1016 {
1017 proc_net_remove(net, "raw");
1018 }
1019
1020 static __net_initdata struct pernet_operations raw_net_ops = {
1021 .init = raw_init_net,
1022 .exit = raw_exit_net,
1023 };
1024
1025 int __init raw_proc_init(void)
1026 {
1027 return register_pernet_subsys(&raw_net_ops);
1028 }
1029
1030 void __init raw_proc_exit(void)
1031 {
1032 unregister_pernet_subsys(&raw_net_ops);
1033 }
1034 #endif /* CONFIG_PROC_FS */
Tomato firmware and modifications.