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[TCP]: Make tcp_splice_data_recv() static.
[net-next-2.6.git] / net / ipv4 / raw.c
CommitLineData
1da177e4
LT		 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 *
02c30a84 10 * Authors: Ross Biro
1da177e4
LT		 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 */
bf0d5249 41
715b49ef 42#include <linux/types.h>
1da177e4
LT		 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>
1da177e4
LT		 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>
1da177e4 61#include <linux/skbuff.h>
457c4cbc 62#include <net/net_namespace.h>
1da177e4
LT		 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>
c752f073 73#include <net/tcp_states.h>
1da177e4
LT		 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
83struct hlist_head raw_v4_htable[RAWV4_HTABLE_SIZE];
84DEFINE_RWLOCK(raw_v4_lock);
85
86static void raw_v4_hash(struct sock *sk)
87{
88 struct hlist_head *head = &raw_v4_htable[inet_sk(sk)->num &
89 (RAWV4_HTABLE_SIZE - 1)];
90
91 write_lock_bh(&raw_v4_lock);
92 sk_add_node(sk, head);
93 sock_prot_inc_use(sk->sk_prot);
94 write_unlock_bh(&raw_v4_lock);
95}
96
97static void raw_v4_unhash(struct sock *sk)
98{
e905a9ed 99 write_lock_bh(&raw_v4_lock);
1da177e4
LT		 100 if (sk_del_node_init(sk))
101 sock_prot_dec_use(sk->sk_prot);
102 write_unlock_bh(&raw_v4_lock);
103}
104
105struct sock *__raw_v4_lookup(struct sock *sk, unsigned short num,
6d741653 106 __be32 raddr, __be32 laddr,
1da177e4
LT		 107 int dif)
108{
109 struct hlist_node *node;
110
111 sk_for_each_from(sk, node) {
112 struct inet_sock *inet = inet_sk(sk);
113
114 if (inet->num == num &&
115 !(inet->daddr && inet->daddr != raddr) &&
116 !(inet->rcv_saddr && inet->rcv_saddr != laddr) &&
117 !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
118 goto found; /* gotcha */
119 }
120 sk = NULL;
121found:
122 return sk;
123}
124
125/*
126 * 0 - deliver
127 * 1 - block
128 */
129static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb)
130{
131 int type;
132
133 if (!pskb_may_pull(skb, sizeof(struct icmphdr)))
134 return 1;
135
88c7664f 136 type = icmp_hdr(skb)->type;
1da177e4
LT		 137 if (type < 32) {
138 __u32 data = raw_sk(sk)->filter.data;
139
140 return ((1 << type) & data) != 0;
141 }
142
143 /* Do not block unknown ICMP types */
144 return 0;
145}
146
147/* IP input processing comes here for RAW socket delivery.
148 * Caller owns SKB, so we must make clones.
149 *
150 * RFC 1122: SHOULD pass TOS value up to the transport layer.
151 * -> It does. And not only TOS, but all IP header.
152 */
d13964f4 153int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
1da177e4
LT		 154{
155 struct sock *sk;
156 struct hlist_head *head;
d13964f4 157 int delivered = 0;
1da177e4
LT		 158
159 read_lock(&raw_v4_lock);
160 head = &raw_v4_htable[hash];
161 if (hlist_empty(head))
162 goto out;
163 sk = __raw_v4_lookup(__sk_head(head), iph->protocol,
164 iph->saddr, iph->daddr,
165 skb->dev->ifindex);
166
167 while (sk) {
d13964f4 168 delivered = 1;
1da177e4
LT		 169 if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) {
170 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
171
172 /* Not releasing hash table! */
173 if (clone)
174 raw_rcv(sk, clone);
175 }
176 sk = __raw_v4_lookup(sk_next(sk), iph->protocol,
177 iph->saddr, iph->daddr,
178 skb->dev->ifindex);
179 }
180out:
181 read_unlock(&raw_v4_lock);
d13964f4 182 return delivered;
1da177e4
LT		 183}
184
185void raw_err (struct sock *sk, struct sk_buff *skb, u32 info)
186{
187 struct inet_sock *inet = inet_sk(sk);
88c7664f
ACM		 188 const int type = icmp_hdr(skb)->type;
189 const int code = icmp_hdr(skb)->code;
1da177e4
LT		 190 int err = 0;
191 int harderr = 0;
192
193 /* Report error on raw socket, if:
194 1. User requested ip_recverr.
195 2. Socket is connected (otherwise the error indication
196 is useless without ip_recverr and error is hard.
197 */
198 if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED)
199 return;
200
201 switch (type) {
202 default:
203 case ICMP_TIME_EXCEEDED:
204 err = EHOSTUNREACH;
205 break;
206 case ICMP_SOURCE_QUENCH:
207 return;
208 case ICMP_PARAMETERPROB:
209 err = EPROTO;
210 harderr = 1;
211 break;
212 case ICMP_DEST_UNREACH:
213 err = EHOSTUNREACH;
214 if (code > NR_ICMP_UNREACH)
215 break;
216 err = icmp_err_convert[code].errno;
217 harderr = icmp_err_convert[code].fatal;
218 if (code == ICMP_FRAG_NEEDED) {
219 harderr = inet->pmtudisc != IP_PMTUDISC_DONT;
220 err = EMSGSIZE;
221 }
222 }
223
224 if (inet->recverr) {
225 struct iphdr *iph = (struct iphdr*)skb->data;
226 u8 *payload = skb->data + (iph->ihl << 2);
227
228 if (inet->hdrincl)
229 payload = skb->data;
230 ip_icmp_error(sk, skb, err, 0, info, payload);
231 }
232
233 if (inet->recverr || harderr) {
234 sk->sk_err = err;
235 sk->sk_error_report(sk);
236 }
237}
238
239static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb)
240{
241 /* Charge it to the socket. */
e905a9ed 242
1da177e4
LT		 243 if (sock_queue_rcv_skb(sk, skb) < 0) {
244 /* FIXME: increment a raw drops counter here */
245 kfree_skb(skb);
246 return NET_RX_DROP;
247 }
248
249 return NET_RX_SUCCESS;
250}
251
252int raw_rcv(struct sock *sk, struct sk_buff *skb)
253{
254 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
255 kfree_skb(skb);
256 return NET_RX_DROP;
257 }
b59c2701 258 nf_reset(skb);
1da177e4 259
d56f90a7 260 skb_push(skb, skb->data - skb_network_header(skb));
1da177e4
LT		 261
262 raw_rcv_skb(sk, skb);
263 return 0;
264}
265
f7d7fc03 266static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
e905a9ed 267 struct rtable *rt,
1da177e4
LT		 268 unsigned int flags)
269{
270 struct inet_sock *inet = inet_sk(sk);
271 int hh_len;
272 struct iphdr *iph;
273 struct sk_buff *skb;
f844c74f 274 unsigned int iphlen;
1da177e4
LT		 275 int err;
276
277 if (length > rt->u.dst.dev->mtu) {
278 ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->dport,
279 rt->u.dst.dev->mtu);
280 return -EMSGSIZE;
281 }
282 if (flags&MSG_PROBE)
283 goto out;
284
285 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
286
287 skb = sock_alloc_send_skb(sk, length+hh_len+15,
288 flags&MSG_DONTWAIT, &err);
289 if (skb == NULL)
e905a9ed 290 goto error;
1da177e4
LT		 291 skb_reserve(skb, hh_len);
292
293 skb->priority = sk->sk_priority;
294 skb->dst = dst_clone(&rt->u.dst);
295
7e28ecc2 296 skb_reset_network_header(skb);
eddc9ec5 297 iph = ip_hdr(skb);
7e28ecc2 298 skb_put(skb, length);
1da177e4
LT		 299
300 skb->ip_summed = CHECKSUM_NONE;
301
b0e380b1 302 skb->transport_header = skb->network_header;
1da177e4
LT		 303 err = memcpy_fromiovecend((void *)iph, from, 0, length);
304 if (err)
305 goto error_fault;
306
307 /* We don't modify invalid header */
f844c74f
HX		 308 iphlen = iph->ihl * 4;
309 if (iphlen >= sizeof(*iph) && iphlen <= length) {
1da177e4
LT		 310 if (!iph->saddr)
311 iph->saddr = rt->rt_src;
312 iph->check = 0;
313 iph->tot_len = htons(length);
314 if (!iph->id)
315 ip_select_ident(iph, &rt->u.dst, NULL);
316
317 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
318 }
96793b48
DS		 319 if (iph->protocol == IPPROTO_ICMP)
320 icmp_out_count(((struct icmphdr *)
321 skb_transport_header(skb))->type);
1da177e4
LT		 322
323 err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
324 dst_output);
325 if (err > 0)
326 err = inet->recverr ? net_xmit_errno(err) : 0;
327 if (err)
328 goto error;
329out:
330 return 0;
331
332error_fault:
333 err = -EFAULT;
334 kfree_skb(skb);
335error:
336 IP_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
e905a9ed 337 return err;
1da177e4
LT		 338}
339
a27b58fe 340static int raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
1da177e4
LT		 341{
342 struct iovec *iov;
343 u8 __user *type = NULL;
344 u8 __user *code = NULL;
345 int probed = 0;
93765d8a 346 unsigned int i;
1da177e4
LT		 347
348 if (!msg->msg_iov)
a27b58fe 349 return 0;
1da177e4
LT		 350
351 for (i = 0; i < msg->msg_iovlen; i++) {
352 iov = &msg->msg_iov[i];
353 if (!iov)
354 continue;
355
356 switch (fl->proto) {
357 case IPPROTO_ICMP:
358 /* check if one-byte field is readable or not. */
359 if (iov->iov_base && iov->iov_len < 1)
360 break;
361
362 if (!type) {
363 type = iov->iov_base;
364 /* check if code field is readable or not. */
365 if (iov->iov_len > 1)
366 code = type + 1;
367 } else if (!code)
368 code = iov->iov_base;
369
370 if (type && code) {
a27b58fe
HC		 371 if (get_user(fl->fl_icmp_type, type) ||
372 get_user(fl->fl_icmp_code, code))
373 return -EFAULT;
1da177e4
LT		 374 probed = 1;
375 }
376 break;
377 default:
378 probed = 1;
379 break;
380 }
381 if (probed)
382 break;
383 }
a27b58fe 384 return 0;
1da177e4
LT		 385}
386
387static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
388 size_t len)
389{
390 struct inet_sock *inet = inet_sk(sk);
391 struct ipcm_cookie ipc;
392 struct rtable *rt = NULL;
393 int free = 0;
3ca3c68e 394 __be32 daddr;
c1d18f9f 395 __be32 saddr;
1da177e4
LT		 396 u8 tos;
397 int err;
398
399 err = -EMSGSIZE;
926d4b81 400 if (len > 0xFFFF)
1da177e4
LT		 401 goto out;
402
403 /*
404 * Check the flags.
405 */
406
407 err = -EOPNOTSUPP;
408 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
409 goto out; /* compatibility */
e905a9ed 410
1da177e4 411 /*
e905a9ed 412 * Get and verify the address.
1da177e4
LT		 413 */
414
415 if (msg->msg_namelen) {
416 struct sockaddr_in *usin = (struct sockaddr_in*)msg->msg_name;
417 err = -EINVAL;
418 if (msg->msg_namelen < sizeof(*usin))
419 goto out;
420 if (usin->sin_family != AF_INET) {
421 static int complained;
422 if (!complained++)
423 printk(KERN_INFO "%s forgot to set AF_INET in "
424 "raw sendmsg. Fix it!\n",
425 current->comm);
426 err = -EAFNOSUPPORT;
427 if (usin->sin_family)
428 goto out;
429 }
430 daddr = usin->sin_addr.s_addr;
431 /* ANK: I did not forget to get protocol from port field.
432 * I just do not know, who uses this weirdness.
433 * IP_HDRINCL is much more convenient.
434 */
435 } else {
436 err = -EDESTADDRREQ;
e905a9ed 437 if (sk->sk_state != TCP_ESTABLISHED)
1da177e4
LT		 438 goto out;
439 daddr = inet->daddr;
440 }
441
442 ipc.addr = inet->saddr;
443 ipc.opt = NULL;
444 ipc.oif = sk->sk_bound_dev_if;
445
446 if (msg->msg_controllen) {
447 err = ip_cmsg_send(msg, &ipc);
448 if (err)
449 goto out;
450 if (ipc.opt)
451 free = 1;
452 }
453
454 saddr = ipc.addr;
455 ipc.addr = daddr;
456
457 if (!ipc.opt)
458 ipc.opt = inet->opt;
459
460 if (ipc.opt) {
461 err = -EINVAL;
462 /* Linux does not mangle headers on raw sockets,
463 * so that IP options + IP_HDRINCL is non-sense.
464 */
465 if (inet->hdrincl)
466 goto done;
467 if (ipc.opt->srr) {
468 if (!daddr)
469 goto done;
470 daddr = ipc.opt->faddr;
471 }
472 }
473 tos = RT_CONN_FLAGS(sk);
474 if (msg->msg_flags & MSG_DONTROUTE)
475 tos |= RTO_ONLINK;
476
477 if (MULTICAST(daddr)) {
478 if (!ipc.oif)
479 ipc.oif = inet->mc_index;
480 if (!saddr)
481 saddr = inet->mc_addr;
482 }
483
484 {
485 struct flowi fl = { .oif = ipc.oif,
486 .nl_u = { .ip4_u =
487 { .daddr = daddr,
488 .saddr = saddr,
489 .tos = tos } },
490 .proto = inet->hdrincl ? IPPROTO_RAW :
e905a9ed 491 sk->sk_protocol,
1da177e4 492 };
a27b58fe
HC		 493 if (!inet->hdrincl) {
494 err = raw_probe_proto_opt(&fl, msg);
495 if (err)
496 goto done;
497 }
1da177e4 498
beb8d13b 499 security_sk_classify_flow(sk, &fl);
8eb9086f 500 err = ip_route_output_flow(&rt, &fl, sk, 1);
1da177e4
LT		 501 }
502 if (err)
503 goto done;
504
505 err = -EACCES;
506 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
507 goto done;
508
509 if (msg->msg_flags & MSG_CONFIRM)
510 goto do_confirm;
511back_from_confirm:
512
513 if (inet->hdrincl)
e905a9ed 514 err = raw_send_hdrinc(sk, msg->msg_iov, len,
1da177e4 515 rt, msg->msg_flags);
e905a9ed 516
1da177e4
LT		 517 else {
518 if (!ipc.addr)
519 ipc.addr = rt->rt_dst;
520 lock_sock(sk);
521 err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
522 &ipc, rt, msg->msg_flags);
523 if (err)
524 ip_flush_pending_frames(sk);
525 else if (!(msg->msg_flags & MSG_MORE))
526 err = ip_push_pending_frames(sk);
527 release_sock(sk);
528 }
529done:
530 if (free)
531 kfree(ipc.opt);
532 ip_rt_put(rt);
533
5418c692
JJ		 534out:
535 if (err < 0)
536 return err;
537 return len;
1da177e4
LT		 538
539do_confirm:
540 dst_confirm(&rt->u.dst);
541 if (!(msg->msg_flags & MSG_PROBE) || len)
542 goto back_from_confirm;
543 err = 0;
544 goto done;
545}
546
547static void raw_close(struct sock *sk, long timeout)
548{
e905a9ed 549 /*
1da177e4
LT		 550 * Raw sockets may have direct kernel refereneces. Kill them.
551 */
552 ip_ra_control(sk, 0, NULL);
553
554 sk_common_release(sk);
555}
556
557/* This gets rid of all the nasties in af_inet. -DaveM */
558static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
559{
560 struct inet_sock *inet = inet_sk(sk);
561 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
562 int ret = -EINVAL;
563 int chk_addr_ret;
564
565 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
566 goto out;
567 chk_addr_ret = inet_addr_type(addr->sin_addr.s_addr);
568 ret = -EADDRNOTAVAIL;
569 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
570 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
571 goto out;
572 inet->rcv_saddr = inet->saddr = addr->sin_addr.s_addr;
573 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
574 inet->saddr = 0; /* Use device */
575 sk_dst_reset(sk);
576 ret = 0;
577out: return ret;
578}
579
580/*
581 * This should be easy, if there is something there
582 * we return it, otherwise we block.
583 */
584
585static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
586 size_t len, int noblock, int flags, int *addr_len)
587{
588 struct inet_sock *inet = inet_sk(sk);
589 size_t copied = 0;
590 int err = -EOPNOTSUPP;
591 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
592 struct sk_buff *skb;
593
594 if (flags & MSG_OOB)
595 goto out;
596
597 if (addr_len)
598 *addr_len = sizeof(*sin);
599
600 if (flags & MSG_ERRQUEUE) {
601 err = ip_recv_error(sk, msg, len);
602 goto out;
603 }
604
605 skb = skb_recv_datagram(sk, flags, noblock, &err);
606 if (!skb)
607 goto out;
608
609 copied = skb->len;
610 if (len < copied) {
611 msg->msg_flags |= MSG_TRUNC;
612 copied = len;
613 }
614
615 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
616 if (err)
617 goto done;
618
619 sock_recv_timestamp(msg, sk, skb);
620
621 /* Copy the address. */
622 if (sin) {
623 sin->sin_family = AF_INET;
eddc9ec5 624 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
f59fc7f3 625 sin->sin_port = 0;
1da177e4
LT		 626 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
627 }
628 if (inet->cmsg_flags)
629 ip_cmsg_recv(msg, skb);
630 if (flags & MSG_TRUNC)
631 copied = skb->len;
632done:
633 skb_free_datagram(sk, skb);
5418c692
JJ		 634out:
635 if (err)
636 return err;
637 return copied;
1da177e4
LT		 638}
639
640static int raw_init(struct sock *sk)
641{
642 struct raw_sock *rp = raw_sk(sk);
643
644 if (inet_sk(sk)->num == IPPROTO_ICMP)
645 memset(&rp->filter, 0, sizeof(rp->filter));
646 return 0;
647}
648
649static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
650{
651 if (optlen > sizeof(struct icmp_filter))
652 optlen = sizeof(struct icmp_filter);
653 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
654 return -EFAULT;
655 return 0;
656}
657
658static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
659{
660 int len, ret = -EFAULT;
661
662 if (get_user(len, optlen))
663 goto out;
664 ret = -EINVAL;
665 if (len < 0)
666 goto out;
667 if (len > sizeof(struct icmp_filter))
668 len = sizeof(struct icmp_filter);
669 ret = -EFAULT;
670 if (put_user(len, optlen) ||
671 copy_to_user(optval, &raw_sk(sk)->filter, len))
672 goto out;
673 ret = 0;
674out: return ret;
675}
676
3fdadf7d 677static int do_raw_setsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 678 char __user *optval, int optlen)
679{
1da177e4
LT		 680 if (optname == ICMP_FILTER) {
681 if (inet_sk(sk)->num != IPPROTO_ICMP)
682 return -EOPNOTSUPP;
683 else
684 return raw_seticmpfilter(sk, optval, optlen);
685 }
686 return -ENOPROTOOPT;
687}
688
3fdadf7d
DM		 689static int raw_setsockopt(struct sock *sk, int level, int optname,
690 char __user *optval, int optlen)
1da177e4
LT		 691{
692 if (level != SOL_RAW)
3fdadf7d
DM		 693 return ip_setsockopt(sk, level, optname, optval, optlen);
694 return do_raw_setsockopt(sk, level, optname, optval, optlen);
695}
1da177e4 696
3fdadf7d
DM		 697#ifdef CONFIG_COMPAT
698static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
543d9cfe 699 char __user *optval, int optlen)
3fdadf7d
DM		 700{
701 if (level != SOL_RAW)
543d9cfe 702 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 703 return do_raw_setsockopt(sk, level, optname, optval, optlen);
704}
705#endif
706
707static int do_raw_getsockopt(struct sock *sk, int level, int optname,
708 char __user *optval, int __user *optlen)
709{
1da177e4
LT		 710 if (optname == ICMP_FILTER) {
711 if (inet_sk(sk)->num != IPPROTO_ICMP)
712 return -EOPNOTSUPP;
713 else
714 return raw_geticmpfilter(sk, optval, optlen);
715 }
716 return -ENOPROTOOPT;
717}
718
3fdadf7d
DM		 719static int raw_getsockopt(struct sock *sk, int level, int optname,
720 char __user *optval, int __user *optlen)
721{
722 if (level != SOL_RAW)
723 return ip_getsockopt(sk, level, optname, optval, optlen);
724 return do_raw_getsockopt(sk, level, optname, optval, optlen);
725}
726
727#ifdef CONFIG_COMPAT
728static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
543d9cfe 729 char __user *optval, int __user *optlen)
3fdadf7d
DM		 730{
731 if (level != SOL_RAW)
543d9cfe 732 return compat_ip_getsockopt(sk, level, optname, optval, optlen);
3fdadf7d
DM		 733 return do_raw_getsockopt(sk, level, optname, optval, optlen);
734}
735#endif
736
1da177e4
LT		 737static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
738{
739 switch (cmd) {
740 case SIOCOUTQ: {
741 int amount = atomic_read(&sk->sk_wmem_alloc);
742 return put_user(amount, (int __user *)arg);
743 }
744 case SIOCINQ: {
745 struct sk_buff *skb;
746 int amount = 0;
747
e0f9f858 748 spin_lock_bh(&sk->sk_receive_queue.lock);
1da177e4
LT		 749 skb = skb_peek(&sk->sk_receive_queue);
750 if (skb != NULL)
751 amount = skb->len;
e0f9f858 752 spin_unlock_bh(&sk->sk_receive_queue.lock);
1da177e4
LT		 753 return put_user(amount, (int __user *)arg);
754 }
755
756 default:
757#ifdef CONFIG_IP_MROUTE
758 return ipmr_ioctl(sk, cmd, (void __user *)arg);
759#else
760 return -ENOIOCTLCMD;
761#endif
762 }
763}
764
47a31a6f
ED		 765DEFINE_PROTO_INUSE(raw)
766
1da177e4 767struct proto raw_prot = {
543d9cfe
ACM		 768 .name = "RAW",
769 .owner = THIS_MODULE,
770 .close = raw_close,
771 .connect = ip4_datagram_connect,
772 .disconnect = udp_disconnect,
773 .ioctl = raw_ioctl,
774 .init = raw_init,
775 .setsockopt = raw_setsockopt,
776 .getsockopt = raw_getsockopt,
777 .sendmsg = raw_sendmsg,
778 .recvmsg = raw_recvmsg,
779 .bind = raw_bind,
780 .backlog_rcv = raw_rcv_skb,
781 .hash = raw_v4_hash,
782 .unhash = raw_v4_unhash,
783 .obj_size = sizeof(struct raw_sock),
3fdadf7d 784#ifdef CONFIG_COMPAT
543d9cfe
ACM		 785 .compat_setsockopt = compat_raw_setsockopt,
786 .compat_getsockopt = compat_raw_getsockopt,
3fdadf7d 787#endif
47a31a6f 788 REF_PROTO_INUSE(raw)
1da177e4
LT		 789};
790
791#ifdef CONFIG_PROC_FS
792struct raw_iter_state {
793 int bucket;
794};
795
796#define raw_seq_private(seq) ((struct raw_iter_state *)(seq)->private)
797
798static struct sock *raw_get_first(struct seq_file *seq)
799{
800 struct sock *sk;
801 struct raw_iter_state* state = raw_seq_private(seq);
802
803 for (state->bucket = 0; state->bucket < RAWV4_HTABLE_SIZE; ++state->bucket) {
804 struct hlist_node *node;
805
806 sk_for_each(sk, node, &raw_v4_htable[state->bucket])
807 if (sk->sk_family == PF_INET)
808 goto found;
809 }
810 sk = NULL;
811found:
812 return sk;
813}
814
815static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
816{
817 struct raw_iter_state* state = raw_seq_private(seq);
818
819 do {
820 sk = sk_next(sk);
821try_again:
822 ;
823 } while (sk && sk->sk_family != PF_INET);
824
825 if (!sk && ++state->bucket < RAWV4_HTABLE_SIZE) {
826 sk = sk_head(&raw_v4_htable[state->bucket]);
827 goto try_again;
828 }
829 return sk;
830}
831
832static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
833{
834 struct sock *sk = raw_get_first(seq);
835
836 if (sk)
837 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
838 --pos;
839 return pos ? NULL : sk;
840}
841
842static void *raw_seq_start(struct seq_file *seq, loff_t *pos)
843{
844 read_lock(&raw_v4_lock);
845 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
846}
847
848static void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
849{
850 struct sock *sk;
851
852 if (v == SEQ_START_TOKEN)
853 sk = raw_get_first(seq);
854 else
855 sk = raw_get_next(seq, v);
856 ++*pos;
857 return sk;
858}
859
860static void raw_seq_stop(struct seq_file *seq, void *v)
861{
862 read_unlock(&raw_v4_lock);
863}
864
865static __inline__ char *get_raw_sock(struct sock *sp, char *tmpbuf, int i)
866{
867 struct inet_sock *inet = inet_sk(sp);
714e85be
AV		 868 __be32 dest = inet->daddr,
869 src = inet->rcv_saddr;
1da177e4
LT		 870 __u16 destp = 0,
871 srcp = inet->num;
872
873 sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X"
874 " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p",
e905a9ed 875 i, src, srcp, dest, destp, sp->sk_state,
1da177e4
LT		 876 atomic_read(&sp->sk_wmem_alloc),
877 atomic_read(&sp->sk_rmem_alloc),
878 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
879 atomic_read(&sp->sk_refcnt), sp);
880 return tmpbuf;
881}
882
883static int raw_seq_show(struct seq_file *seq, void *v)
884{
885 char tmpbuf[129];
886
887 if (v == SEQ_START_TOKEN)
888 seq_printf(seq, "%-127s\n",
889 " sl local_address rem_address st tx_queue "
890 "rx_queue tr tm->when retrnsmt uid timeout "
891 "inode");
892 else {
893 struct raw_iter_state *state = raw_seq_private(seq);
894
895 seq_printf(seq, "%-127s\n",
896 get_raw_sock(v, tmpbuf, state->bucket));
897 }
898 return 0;
899}
900
f690808e 901static const struct seq_operations raw_seq_ops = {
1da177e4
LT		 902 .start = raw_seq_start,
903 .next = raw_seq_next,
904 .stop = raw_seq_stop,
905 .show = raw_seq_show,
906};
907
908static int raw_seq_open(struct inode *inode, struct file *file)
909{
cf7732e4
PE		 910 return seq_open_private(file, &raw_seq_ops,
911 sizeof(struct raw_iter_state));
1da177e4
LT		 912}
913
9a32144e 914static const struct file_operations raw_seq_fops = {
1da177e4
LT		 915 .owner = THIS_MODULE,
916 .open = raw_seq_open,
917 .read = seq_read,
918 .llseek = seq_lseek,
919 .release = seq_release_private,
920};
921
922int __init raw_proc_init(void)
923{
457c4cbc 924 if (!proc_net_fops_create(&init_net, "raw", S_IRUGO, &raw_seq_fops))
1da177e4
LT		 925 return -ENOMEM;
926 return 0;
927}
928
929void __init raw_proc_exit(void)
930{
457c4cbc 931 proc_net_remove(&init_net, "raw");
1da177e4
LT		 932}
933#endif /* CONFIG_PROC_FS */
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