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[SK_BUFF]: export skb_pull_rcsum
[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 */
41
42#include <linux/config.h>
715b49ef 43#include <linux/types.h>
1da177e4
LT		 44#include <asm/atomic.h>
45#include <asm/byteorder.h>
46#include <asm/current.h>
47#include <asm/uaccess.h>
48#include <asm/ioctls.h>
1da177e4
LT		 49#include <linux/stddef.h>
50#include <linux/slab.h>
51#include <linux/errno.h>
52#include <linux/aio.h>
53#include <linux/kernel.h>
54#include <linux/spinlock.h>
55#include <linux/sockios.h>
56#include <linux/socket.h>
57#include <linux/in.h>
58#include <linux/mroute.h>
59#include <linux/netdevice.h>
60#include <linux/in_route.h>
61#include <linux/route.h>
1da177e4
LT		 62#include <linux/skbuff.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>
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{
99 write_lock_bh(&raw_v4_lock);
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,
106 unsigned long raddr, unsigned long laddr,
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
136 type = skb->h.icmph->type;
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);
188 int type = skb->h.icmph->type;
189 int code = skb->h.icmph->code;
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. */
242
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
LT		 259
260 skb_push(skb, skb->data - skb->nh.raw);
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,
1da177e4
LT		 267 struct rtable *rt,
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;
274 int err;
275
276 if (length > rt->u.dst.dev->mtu) {
277 ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->dport,
278 rt->u.dst.dev->mtu);
279 return -EMSGSIZE;
280 }
281 if (flags&MSG_PROBE)
282 goto out;
283
284 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
285
286 skb = sock_alloc_send_skb(sk, length+hh_len+15,
287 flags&MSG_DONTWAIT, &err);
288 if (skb == NULL)
289 goto error;
290 skb_reserve(skb, hh_len);
291
292 skb->priority = sk->sk_priority;
293 skb->dst = dst_clone(&rt->u.dst);
294
295 skb->nh.iph = iph = (struct iphdr *)skb_put(skb, length);
296
297 skb->ip_summed = CHECKSUM_NONE;
298
299 skb->h.raw = skb->nh.raw;
300 err = memcpy_fromiovecend((void *)iph, from, 0, length);
301 if (err)
302 goto error_fault;
303
304 /* We don't modify invalid header */
f7d7fc03 305 if (length >= sizeof(*iph) && iph->ihl * 4U <= length) {
1da177e4
LT		 306 if (!iph->saddr)
307 iph->saddr = rt->rt_src;
308 iph->check = 0;
309 iph->tot_len = htons(length);
310 if (!iph->id)
311 ip_select_ident(iph, &rt->u.dst, NULL);
312
313 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
314 }
315
316 err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
317 dst_output);
318 if (err > 0)
319 err = inet->recverr ? net_xmit_errno(err) : 0;
320 if (err)
321 goto error;
322out:
323 return 0;
324
325error_fault:
326 err = -EFAULT;
327 kfree_skb(skb);
328error:
329 IP_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
330 return err;
331}
332
333static void raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
334{
335 struct iovec *iov;
336 u8 __user *type = NULL;
337 u8 __user *code = NULL;
338 int probed = 0;
93765d8a 339 unsigned int i;
1da177e4
LT		 340
341 if (!msg->msg_iov)
342 return;
343
344 for (i = 0; i < msg->msg_iovlen; i++) {
345 iov = &msg->msg_iov[i];
346 if (!iov)
347 continue;
348
349 switch (fl->proto) {
350 case IPPROTO_ICMP:
351 /* check if one-byte field is readable or not. */
352 if (iov->iov_base && iov->iov_len < 1)
353 break;
354
355 if (!type) {
356 type = iov->iov_base;
357 /* check if code field is readable or not. */
358 if (iov->iov_len > 1)
359 code = type + 1;
360 } else if (!code)
361 code = iov->iov_base;
362
363 if (type && code) {
364 get_user(fl->fl_icmp_type, type);
6d1cfe3f 365 get_user(fl->fl_icmp_code, code);
1da177e4
LT		 366 probed = 1;
367 }
368 break;
369 default:
370 probed = 1;
371 break;
372 }
373 if (probed)
374 break;
375 }
376}
377
378static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
379 size_t len)
380{
381 struct inet_sock *inet = inet_sk(sk);
382 struct ipcm_cookie ipc;
383 struct rtable *rt = NULL;
384 int free = 0;
385 u32 daddr;
386 u32 saddr;
387 u8 tos;
388 int err;
389
390 err = -EMSGSIZE;
926d4b81 391 if (len > 0xFFFF)
1da177e4
LT		 392 goto out;
393
394 /*
395 * Check the flags.
396 */
397
398 err = -EOPNOTSUPP;
399 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
400 goto out; /* compatibility */
401
402 /*
403 * Get and verify the address.
404 */
405
406 if (msg->msg_namelen) {
407 struct sockaddr_in *usin = (struct sockaddr_in*)msg->msg_name;
408 err = -EINVAL;
409 if (msg->msg_namelen < sizeof(*usin))
410 goto out;
411 if (usin->sin_family != AF_INET) {
412 static int complained;
413 if (!complained++)
414 printk(KERN_INFO "%s forgot to set AF_INET in "
415 "raw sendmsg. Fix it!\n",
416 current->comm);
417 err = -EAFNOSUPPORT;
418 if (usin->sin_family)
419 goto out;
420 }
421 daddr = usin->sin_addr.s_addr;
422 /* ANK: I did not forget to get protocol from port field.
423 * I just do not know, who uses this weirdness.
424 * IP_HDRINCL is much more convenient.
425 */
426 } else {
427 err = -EDESTADDRREQ;
428 if (sk->sk_state != TCP_ESTABLISHED)
429 goto out;
430 daddr = inet->daddr;
431 }
432
433 ipc.addr = inet->saddr;
434 ipc.opt = NULL;
435 ipc.oif = sk->sk_bound_dev_if;
436
437 if (msg->msg_controllen) {
438 err = ip_cmsg_send(msg, &ipc);
439 if (err)
440 goto out;
441 if (ipc.opt)
442 free = 1;
443 }
444
445 saddr = ipc.addr;
446 ipc.addr = daddr;
447
448 if (!ipc.opt)
449 ipc.opt = inet->opt;
450
451 if (ipc.opt) {
452 err = -EINVAL;
453 /* Linux does not mangle headers on raw sockets,
454 * so that IP options + IP_HDRINCL is non-sense.
455 */
456 if (inet->hdrincl)
457 goto done;
458 if (ipc.opt->srr) {
459 if (!daddr)
460 goto done;
461 daddr = ipc.opt->faddr;
462 }
463 }
464 tos = RT_CONN_FLAGS(sk);
465 if (msg->msg_flags & MSG_DONTROUTE)
466 tos |= RTO_ONLINK;
467
468 if (MULTICAST(daddr)) {
469 if (!ipc.oif)
470 ipc.oif = inet->mc_index;
471 if (!saddr)
472 saddr = inet->mc_addr;
473 }
474
475 {
476 struct flowi fl = { .oif = ipc.oif,
477 .nl_u = { .ip4_u =
478 { .daddr = daddr,
479 .saddr = saddr,
480 .tos = tos } },
481 .proto = inet->hdrincl ? IPPROTO_RAW :
482 sk->sk_protocol,
483 };
484 if (!inet->hdrincl)
485 raw_probe_proto_opt(&fl, msg);
486
487 err = ip_route_output_flow(&rt, &fl, sk, !(msg->msg_flags&MSG_DONTWAIT));
488 }
489 if (err)
490 goto done;
491
492 err = -EACCES;
493 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
494 goto done;
495
496 if (msg->msg_flags & MSG_CONFIRM)
497 goto do_confirm;
498back_from_confirm:
499
500 if (inet->hdrincl)
501 err = raw_send_hdrinc(sk, msg->msg_iov, len,
502 rt, msg->msg_flags);
503
504 else {
505 if (!ipc.addr)
506 ipc.addr = rt->rt_dst;
507 lock_sock(sk);
508 err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
509 &ipc, rt, msg->msg_flags);
510 if (err)
511 ip_flush_pending_frames(sk);
512 else if (!(msg->msg_flags & MSG_MORE))
513 err = ip_push_pending_frames(sk);
514 release_sock(sk);
515 }
516done:
517 if (free)
518 kfree(ipc.opt);
519 ip_rt_put(rt);
520
5418c692
JJ		 521out:
522 if (err < 0)
523 return err;
524 return len;
1da177e4
LT		 525
526do_confirm:
527 dst_confirm(&rt->u.dst);
528 if (!(msg->msg_flags & MSG_PROBE) || len)
529 goto back_from_confirm;
530 err = 0;
531 goto done;
532}
533
534static void raw_close(struct sock *sk, long timeout)
535{
536 /*
537 * Raw sockets may have direct kernel refereneces. Kill them.
538 */
539 ip_ra_control(sk, 0, NULL);
540
541 sk_common_release(sk);
542}
543
544/* This gets rid of all the nasties in af_inet. -DaveM */
545static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
546{
547 struct inet_sock *inet = inet_sk(sk);
548 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
549 int ret = -EINVAL;
550 int chk_addr_ret;
551
552 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
553 goto out;
554 chk_addr_ret = inet_addr_type(addr->sin_addr.s_addr);
555 ret = -EADDRNOTAVAIL;
556 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
557 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
558 goto out;
559 inet->rcv_saddr = inet->saddr = addr->sin_addr.s_addr;
560 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
561 inet->saddr = 0; /* Use device */
562 sk_dst_reset(sk);
563 ret = 0;
564out: return ret;
565}
566
567/*
568 * This should be easy, if there is something there
569 * we return it, otherwise we block.
570 */
571
572static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
573 size_t len, int noblock, int flags, int *addr_len)
574{
575 struct inet_sock *inet = inet_sk(sk);
576 size_t copied = 0;
577 int err = -EOPNOTSUPP;
578 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
579 struct sk_buff *skb;
580
581 if (flags & MSG_OOB)
582 goto out;
583
584 if (addr_len)
585 *addr_len = sizeof(*sin);
586
587 if (flags & MSG_ERRQUEUE) {
588 err = ip_recv_error(sk, msg, len);
589 goto out;
590 }
591
592 skb = skb_recv_datagram(sk, flags, noblock, &err);
593 if (!skb)
594 goto out;
595
596 copied = skb->len;
597 if (len < copied) {
598 msg->msg_flags |= MSG_TRUNC;
599 copied = len;
600 }
601
602 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
603 if (err)
604 goto done;
605
606 sock_recv_timestamp(msg, sk, skb);
607
608 /* Copy the address. */
609 if (sin) {
610 sin->sin_family = AF_INET;
611 sin->sin_addr.s_addr = skb->nh.iph->saddr;
612 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
613 }
614 if (inet->cmsg_flags)
615 ip_cmsg_recv(msg, skb);
616 if (flags & MSG_TRUNC)
617 copied = skb->len;
618done:
619 skb_free_datagram(sk, skb);
5418c692
JJ		 620out:
621 if (err)
622 return err;
623 return copied;
1da177e4
LT		 624}
625
626static int raw_init(struct sock *sk)
627{
628 struct raw_sock *rp = raw_sk(sk);
629
630 if (inet_sk(sk)->num == IPPROTO_ICMP)
631 memset(&rp->filter, 0, sizeof(rp->filter));
632 return 0;
633}
634
635static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
636{
637 if (optlen > sizeof(struct icmp_filter))
638 optlen = sizeof(struct icmp_filter);
639 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
640 return -EFAULT;
641 return 0;
642}
643
644static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
645{
646 int len, ret = -EFAULT;
647
648 if (get_user(len, optlen))
649 goto out;
650 ret = -EINVAL;
651 if (len < 0)
652 goto out;
653 if (len > sizeof(struct icmp_filter))
654 len = sizeof(struct icmp_filter);
655 ret = -EFAULT;
656 if (put_user(len, optlen) ||
657 copy_to_user(optval, &raw_sk(sk)->filter, len))
658 goto out;
659 ret = 0;
660out: return ret;
661}
662
3fdadf7d 663static int do_raw_setsockopt(struct sock *sk, int level, int optname,
1da177e4
LT		 664 char __user *optval, int optlen)
665{
1da177e4
LT		 666 if (optname == ICMP_FILTER) {
667 if (inet_sk(sk)->num != IPPROTO_ICMP)
668 return -EOPNOTSUPP;
669 else
670 return raw_seticmpfilter(sk, optval, optlen);
671 }
672 return -ENOPROTOOPT;
673}
674
3fdadf7d
DM		 675static int raw_setsockopt(struct sock *sk, int level, int optname,
676 char __user *optval, int optlen)
1da177e4
LT		 677{
678 if (level != SOL_RAW)
3fdadf7d
DM		 679 return ip_setsockopt(sk, level, optname, optval, optlen);
680 return do_raw_setsockopt(sk, level, optname, optval, optlen);
681}
1da177e4 682
3fdadf7d
DM		 683#ifdef CONFIG_COMPAT
684static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
685 char __user *optval, int optlen)
686{
687 if (level != SOL_RAW)
688 return compat_ip_setsockopt(sk, level,
689 optname, optval, optlen);
690 return do_raw_setsockopt(sk, level, optname, optval, optlen);
691}
692#endif
693
694static int do_raw_getsockopt(struct sock *sk, int level, int optname,
695 char __user *optval, int __user *optlen)
696{
1da177e4
LT		 697 if (optname == ICMP_FILTER) {
698 if (inet_sk(sk)->num != IPPROTO_ICMP)
699 return -EOPNOTSUPP;
700 else
701 return raw_geticmpfilter(sk, optval, optlen);
702 }
703 return -ENOPROTOOPT;
704}
705
3fdadf7d
DM		 706static int raw_getsockopt(struct sock *sk, int level, int optname,
707 char __user *optval, int __user *optlen)
708{
709 if (level != SOL_RAW)
710 return ip_getsockopt(sk, level, optname, optval, optlen);
711 return do_raw_getsockopt(sk, level, optname, optval, optlen);
712}
713
714#ifdef CONFIG_COMPAT
715static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
716 char __user *optval, int __user *optlen)
717{
718 if (level != SOL_RAW)
719 return compat_ip_getsockopt(sk, level,
720 optname, optval, optlen);
721 return do_raw_getsockopt(sk, level, optname, optval, optlen);
722}
723#endif
724
1da177e4
LT		 725static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
726{
727 switch (cmd) {
728 case SIOCOUTQ: {
729 int amount = atomic_read(&sk->sk_wmem_alloc);
730 return put_user(amount, (int __user *)arg);
731 }
732 case SIOCINQ: {
733 struct sk_buff *skb;
734 int amount = 0;
735
e0f9f858 736 spin_lock_bh(&sk->sk_receive_queue.lock);
1da177e4
LT		 737 skb = skb_peek(&sk->sk_receive_queue);
738 if (skb != NULL)
739 amount = skb->len;
e0f9f858 740 spin_unlock_bh(&sk->sk_receive_queue.lock);
1da177e4
LT		 741 return put_user(amount, (int __user *)arg);
742 }
743
744 default:
745#ifdef CONFIG_IP_MROUTE
746 return ipmr_ioctl(sk, cmd, (void __user *)arg);
747#else
748 return -ENOIOCTLCMD;
749#endif
750 }
751}
752
753struct proto raw_prot = {
754 .name = "RAW",
755 .owner = THIS_MODULE,
756 .close = raw_close,
757 .connect = ip4_datagram_connect,
758 .disconnect = udp_disconnect,
759 .ioctl = raw_ioctl,
760 .init = raw_init,
761 .setsockopt = raw_setsockopt,
762 .getsockopt = raw_getsockopt,
3fdadf7d
DM		 763#ifdef CONFIG_COMPAT
764 .compat_setsockopt = compat_raw_setsockopt,
765 .compat_getsockopt = compat_raw_getsockopt,
766#endif
1da177e4
LT		 767 .sendmsg = raw_sendmsg,
768 .recvmsg = raw_recvmsg,
769 .bind = raw_bind,
770 .backlog_rcv = raw_rcv_skb,
771 .hash = raw_v4_hash,
772 .unhash = raw_v4_unhash,
773 .obj_size = sizeof(struct raw_sock),
774};
775
776#ifdef CONFIG_PROC_FS
777struct raw_iter_state {
778 int bucket;
779};
780
781#define raw_seq_private(seq) ((struct raw_iter_state *)(seq)->private)
782
783static struct sock *raw_get_first(struct seq_file *seq)
784{
785 struct sock *sk;
786 struct raw_iter_state* state = raw_seq_private(seq);
787
788 for (state->bucket = 0; state->bucket < RAWV4_HTABLE_SIZE; ++state->bucket) {
789 struct hlist_node *node;
790
791 sk_for_each(sk, node, &raw_v4_htable[state->bucket])
792 if (sk->sk_family == PF_INET)
793 goto found;
794 }
795 sk = NULL;
796found:
797 return sk;
798}
799
800static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
801{
802 struct raw_iter_state* state = raw_seq_private(seq);
803
804 do {
805 sk = sk_next(sk);
806try_again:
807 ;
808 } while (sk && sk->sk_family != PF_INET);
809
810 if (!sk && ++state->bucket < RAWV4_HTABLE_SIZE) {
811 sk = sk_head(&raw_v4_htable[state->bucket]);
812 goto try_again;
813 }
814 return sk;
815}
816
817static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
818{
819 struct sock *sk = raw_get_first(seq);
820
821 if (sk)
822 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
823 --pos;
824 return pos ? NULL : sk;
825}
826
827static void *raw_seq_start(struct seq_file *seq, loff_t *pos)
828{
829 read_lock(&raw_v4_lock);
830 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
831}
832
833static void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
834{
835 struct sock *sk;
836
837 if (v == SEQ_START_TOKEN)
838 sk = raw_get_first(seq);
839 else
840 sk = raw_get_next(seq, v);
841 ++*pos;
842 return sk;
843}
844
845static void raw_seq_stop(struct seq_file *seq, void *v)
846{
847 read_unlock(&raw_v4_lock);
848}
849
850static __inline__ char *get_raw_sock(struct sock *sp, char *tmpbuf, int i)
851{
852 struct inet_sock *inet = inet_sk(sp);
853 unsigned int dest = inet->daddr,
854 src = inet->rcv_saddr;
855 __u16 destp = 0,
856 srcp = inet->num;
857
858 sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X"
859 " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p",
860 i, src, srcp, dest, destp, sp->sk_state,
861 atomic_read(&sp->sk_wmem_alloc),
862 atomic_read(&sp->sk_rmem_alloc),
863 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
864 atomic_read(&sp->sk_refcnt), sp);
865 return tmpbuf;
866}
867
868static int raw_seq_show(struct seq_file *seq, void *v)
869{
870 char tmpbuf[129];
871
872 if (v == SEQ_START_TOKEN)
873 seq_printf(seq, "%-127s\n",
874 " sl local_address rem_address st tx_queue "
875 "rx_queue tr tm->when retrnsmt uid timeout "
876 "inode");
877 else {
878 struct raw_iter_state *state = raw_seq_private(seq);
879
880 seq_printf(seq, "%-127s\n",
881 get_raw_sock(v, tmpbuf, state->bucket));
882 }
883 return 0;
884}
885
886static struct seq_operations raw_seq_ops = {
887 .start = raw_seq_start,
888 .next = raw_seq_next,
889 .stop = raw_seq_stop,
890 .show = raw_seq_show,
891};
892
893static int raw_seq_open(struct inode *inode, struct file *file)
894{
895 struct seq_file *seq;
896 int rc = -ENOMEM;
897 struct raw_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
898
899 if (!s)
900 goto out;
901 rc = seq_open(file, &raw_seq_ops);
902 if (rc)
903 goto out_kfree;
904
905 seq = file->private_data;
906 seq->private = s;
907 memset(s, 0, sizeof(*s));
908out:
909 return rc;
910out_kfree:
911 kfree(s);
912 goto out;
913}
914
915static struct file_operations raw_seq_fops = {
916 .owner = THIS_MODULE,
917 .open = raw_seq_open,
918 .read = seq_read,
919 .llseek = seq_lseek,
920 .release = seq_release_private,
921};
922
923int __init raw_proc_init(void)
924{
925 if (!proc_net_fops_create("raw", S_IRUGO, &raw_seq_fops))
926 return -ENOMEM;
927 return 0;
928}
929
930void __init raw_proc_exit(void)
931{
932 proc_net_remove("raw");
933}
934#endif /* CONFIG_PROC_FS */
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