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[NETFILTER]: Redo policy lookups after NAT when neccessary
[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>
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/types.h>
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 }
258
259 skb_push(skb, skb->data - skb->nh.raw);
260
261 raw_rcv_skb(sk, skb);
262 return 0;
263}
264
f7d7fc03 265static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
1da177e4
LT		 266 struct rtable *rt,
267 unsigned int flags)
268{
269 struct inet_sock *inet = inet_sk(sk);
270 int hh_len;
271 struct iphdr *iph;
272 struct sk_buff *skb;
273 int err;
274
275 if (length > rt->u.dst.dev->mtu) {
276 ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->dport,
277 rt->u.dst.dev->mtu);
278 return -EMSGSIZE;
279 }
280 if (flags&MSG_PROBE)
281 goto out;
282
283 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
284
285 skb = sock_alloc_send_skb(sk, length+hh_len+15,
286 flags&MSG_DONTWAIT, &err);
287 if (skb == NULL)
288 goto error;
289 skb_reserve(skb, hh_len);
290
291 skb->priority = sk->sk_priority;
292 skb->dst = dst_clone(&rt->u.dst);
293
294 skb->nh.iph = iph = (struct iphdr *)skb_put(skb, length);
295
296 skb->ip_summed = CHECKSUM_NONE;
297
298 skb->h.raw = skb->nh.raw;
299 err = memcpy_fromiovecend((void *)iph, from, 0, length);
300 if (err)
301 goto error_fault;
302
303 /* We don't modify invalid header */
f7d7fc03 304 if (length >= sizeof(*iph) && iph->ihl * 4U <= length) {
1da177e4
LT		 305 if (!iph->saddr)
306 iph->saddr = rt->rt_src;
307 iph->check = 0;
308 iph->tot_len = htons(length);
309 if (!iph->id)
310 ip_select_ident(iph, &rt->u.dst, NULL);
311
312 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
313 }
314
315 err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
316 dst_output);
317 if (err > 0)
318 err = inet->recverr ? net_xmit_errno(err) : 0;
319 if (err)
320 goto error;
321out:
322 return 0;
323
324error_fault:
325 err = -EFAULT;
326 kfree_skb(skb);
327error:
328 IP_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
329 return err;
330}
331
332static void raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
333{
334 struct iovec *iov;
335 u8 __user *type = NULL;
336 u8 __user *code = NULL;
337 int probed = 0;
93765d8a 338 unsigned int i;
1da177e4
LT		 339
340 if (!msg->msg_iov)
341 return;
342
343 for (i = 0; i < msg->msg_iovlen; i++) {
344 iov = &msg->msg_iov[i];
345 if (!iov)
346 continue;
347
348 switch (fl->proto) {
349 case IPPROTO_ICMP:
350 /* check if one-byte field is readable or not. */
351 if (iov->iov_base && iov->iov_len < 1)
352 break;
353
354 if (!type) {
355 type = iov->iov_base;
356 /* check if code field is readable or not. */
357 if (iov->iov_len > 1)
358 code = type + 1;
359 } else if (!code)
360 code = iov->iov_base;
361
362 if (type && code) {
363 get_user(fl->fl_icmp_type, type);
6d1cfe3f 364 get_user(fl->fl_icmp_code, code);
1da177e4
LT		 365 probed = 1;
366 }
367 break;
368 default:
369 probed = 1;
370 break;
371 }
372 if (probed)
373 break;
374 }
375}
376
377static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
378 size_t len)
379{
380 struct inet_sock *inet = inet_sk(sk);
381 struct ipcm_cookie ipc;
382 struct rtable *rt = NULL;
383 int free = 0;
384 u32 daddr;
385 u32 saddr;
386 u8 tos;
387 int err;
388
389 err = -EMSGSIZE;
926d4b81 390 if (len > 0xFFFF)
1da177e4
LT		 391 goto out;
392
393 /*
394 * Check the flags.
395 */
396
397 err = -EOPNOTSUPP;
398 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
399 goto out; /* compatibility */
400
401 /*
402 * Get and verify the address.
403 */
404
405 if (msg->msg_namelen) {
406 struct sockaddr_in *usin = (struct sockaddr_in*)msg->msg_name;
407 err = -EINVAL;
408 if (msg->msg_namelen < sizeof(*usin))
409 goto out;
410 if (usin->sin_family != AF_INET) {
411 static int complained;
412 if (!complained++)
413 printk(KERN_INFO "%s forgot to set AF_INET in "
414 "raw sendmsg. Fix it!\n",
415 current->comm);
416 err = -EAFNOSUPPORT;
417 if (usin->sin_family)
418 goto out;
419 }
420 daddr = usin->sin_addr.s_addr;
421 /* ANK: I did not forget to get protocol from port field.
422 * I just do not know, who uses this weirdness.
423 * IP_HDRINCL is much more convenient.
424 */
425 } else {
426 err = -EDESTADDRREQ;
427 if (sk->sk_state != TCP_ESTABLISHED)
428 goto out;
429 daddr = inet->daddr;
430 }
431
432 ipc.addr = inet->saddr;
433 ipc.opt = NULL;
434 ipc.oif = sk->sk_bound_dev_if;
435
436 if (msg->msg_controllen) {
437 err = ip_cmsg_send(msg, &ipc);
438 if (err)
439 goto out;
440 if (ipc.opt)
441 free = 1;
442 }
443
444 saddr = ipc.addr;
445 ipc.addr = daddr;
446
447 if (!ipc.opt)
448 ipc.opt = inet->opt;
449
450 if (ipc.opt) {
451 err = -EINVAL;
452 /* Linux does not mangle headers on raw sockets,
453 * so that IP options + IP_HDRINCL is non-sense.
454 */
455 if (inet->hdrincl)
456 goto done;
457 if (ipc.opt->srr) {
458 if (!daddr)
459 goto done;
460 daddr = ipc.opt->faddr;
461 }
462 }
463 tos = RT_CONN_FLAGS(sk);
464 if (msg->msg_flags & MSG_DONTROUTE)
465 tos |= RTO_ONLINK;
466
467 if (MULTICAST(daddr)) {
468 if (!ipc.oif)
469 ipc.oif = inet->mc_index;
470 if (!saddr)
471 saddr = inet->mc_addr;
472 }
473
474 {
475 struct flowi fl = { .oif = ipc.oif,
476 .nl_u = { .ip4_u =
477 { .daddr = daddr,
478 .saddr = saddr,
479 .tos = tos } },
480 .proto = inet->hdrincl ? IPPROTO_RAW :
481 sk->sk_protocol,
482 };
483 if (!inet->hdrincl)
484 raw_probe_proto_opt(&fl, msg);
485
486 err = ip_route_output_flow(&rt, &fl, sk, !(msg->msg_flags&MSG_DONTWAIT));
487 }
488 if (err)
489 goto done;
490
491 err = -EACCES;
492 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
493 goto done;
494
495 if (msg->msg_flags & MSG_CONFIRM)
496 goto do_confirm;
497back_from_confirm:
498
499 if (inet->hdrincl)
500 err = raw_send_hdrinc(sk, msg->msg_iov, len,
501 rt, msg->msg_flags);
502
503 else {
504 if (!ipc.addr)
505 ipc.addr = rt->rt_dst;
506 lock_sock(sk);
507 err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
508 &ipc, rt, msg->msg_flags);
509 if (err)
510 ip_flush_pending_frames(sk);
511 else if (!(msg->msg_flags & MSG_MORE))
512 err = ip_push_pending_frames(sk);
513 release_sock(sk);
514 }
515done:
516 if (free)
517 kfree(ipc.opt);
518 ip_rt_put(rt);
519
5418c692
JJ		 520out:
521 if (err < 0)
522 return err;
523 return len;
1da177e4
LT		 524
525do_confirm:
526 dst_confirm(&rt->u.dst);
527 if (!(msg->msg_flags & MSG_PROBE) || len)
528 goto back_from_confirm;
529 err = 0;
530 goto done;
531}
532
533static void raw_close(struct sock *sk, long timeout)
534{
535 /*
536 * Raw sockets may have direct kernel refereneces. Kill them.
537 */
538 ip_ra_control(sk, 0, NULL);
539
540 sk_common_release(sk);
541}
542
543/* This gets rid of all the nasties in af_inet. -DaveM */
544static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
545{
546 struct inet_sock *inet = inet_sk(sk);
547 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
548 int ret = -EINVAL;
549 int chk_addr_ret;
550
551 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
552 goto out;
553 chk_addr_ret = inet_addr_type(addr->sin_addr.s_addr);
554 ret = -EADDRNOTAVAIL;
555 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
556 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
557 goto out;
558 inet->rcv_saddr = inet->saddr = addr->sin_addr.s_addr;
559 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
560 inet->saddr = 0; /* Use device */
561 sk_dst_reset(sk);
562 ret = 0;
563out: return ret;
564}
565
566/*
567 * This should be easy, if there is something there
568 * we return it, otherwise we block.
569 */
570
571static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
572 size_t len, int noblock, int flags, int *addr_len)
573{
574 struct inet_sock *inet = inet_sk(sk);
575 size_t copied = 0;
576 int err = -EOPNOTSUPP;
577 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
578 struct sk_buff *skb;
579
580 if (flags & MSG_OOB)
581 goto out;
582
583 if (addr_len)
584 *addr_len = sizeof(*sin);
585
586 if (flags & MSG_ERRQUEUE) {
587 err = ip_recv_error(sk, msg, len);
588 goto out;
589 }
590
591 skb = skb_recv_datagram(sk, flags, noblock, &err);
592 if (!skb)
593 goto out;
594
595 copied = skb->len;
596 if (len < copied) {
597 msg->msg_flags |= MSG_TRUNC;
598 copied = len;
599 }
600
601 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
602 if (err)
603 goto done;
604
605 sock_recv_timestamp(msg, sk, skb);
606
607 /* Copy the address. */
608 if (sin) {
609 sin->sin_family = AF_INET;
610 sin->sin_addr.s_addr = skb->nh.iph->saddr;
611 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
612 }
613 if (inet->cmsg_flags)
614 ip_cmsg_recv(msg, skb);
615 if (flags & MSG_TRUNC)
616 copied = skb->len;
617done:
618 skb_free_datagram(sk, skb);
5418c692
JJ		 619out:
620 if (err)
621 return err;
622 return copied;
1da177e4
LT		 623}
624
625static int raw_init(struct sock *sk)
626{
627 struct raw_sock *rp = raw_sk(sk);
628
629 if (inet_sk(sk)->num == IPPROTO_ICMP)
630 memset(&rp->filter, 0, sizeof(rp->filter));
631 return 0;
632}
633
634static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
635{
636 if (optlen > sizeof(struct icmp_filter))
637 optlen = sizeof(struct icmp_filter);
638 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
639 return -EFAULT;
640 return 0;
641}
642
643static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
644{
645 int len, ret = -EFAULT;
646
647 if (get_user(len, optlen))
648 goto out;
649 ret = -EINVAL;
650 if (len < 0)
651 goto out;
652 if (len > sizeof(struct icmp_filter))
653 len = sizeof(struct icmp_filter);
654 ret = -EFAULT;
655 if (put_user(len, optlen) ||
656 copy_to_user(optval, &raw_sk(sk)->filter, len))
657 goto out;
658 ret = 0;
659out: return ret;
660}
661
662static int raw_setsockopt(struct sock *sk, int level, int optname,
663 char __user *optval, int optlen)
664{
665 if (level != SOL_RAW)
666 return ip_setsockopt(sk, level, optname, optval, optlen);
667
668 if (optname == ICMP_FILTER) {
669 if (inet_sk(sk)->num != IPPROTO_ICMP)
670 return -EOPNOTSUPP;
671 else
672 return raw_seticmpfilter(sk, optval, optlen);
673 }
674 return -ENOPROTOOPT;
675}
676
677static int raw_getsockopt(struct sock *sk, int level, int optname,
678 char __user *optval, int __user *optlen)
679{
680 if (level != SOL_RAW)
681 return ip_getsockopt(sk, level, optname, optval, optlen);
682
683 if (optname == ICMP_FILTER) {
684 if (inet_sk(sk)->num != IPPROTO_ICMP)
685 return -EOPNOTSUPP;
686 else
687 return raw_geticmpfilter(sk, optval, optlen);
688 }
689 return -ENOPROTOOPT;
690}
691
692static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
693{
694 switch (cmd) {
695 case SIOCOUTQ: {
696 int amount = atomic_read(&sk->sk_wmem_alloc);
697 return put_user(amount, (int __user *)arg);
698 }
699 case SIOCINQ: {
700 struct sk_buff *skb;
701 int amount = 0;
702
e0f9f858 703 spin_lock_bh(&sk->sk_receive_queue.lock);
1da177e4
LT		 704 skb = skb_peek(&sk->sk_receive_queue);
705 if (skb != NULL)
706 amount = skb->len;
e0f9f858 707 spin_unlock_bh(&sk->sk_receive_queue.lock);
1da177e4
LT		 708 return put_user(amount, (int __user *)arg);
709 }
710
711 default:
712#ifdef CONFIG_IP_MROUTE
713 return ipmr_ioctl(sk, cmd, (void __user *)arg);
714#else
715 return -ENOIOCTLCMD;
716#endif
717 }
718}
719
720struct proto raw_prot = {
721 .name = "RAW",
722 .owner = THIS_MODULE,
723 .close = raw_close,
724 .connect = ip4_datagram_connect,
725 .disconnect = udp_disconnect,
726 .ioctl = raw_ioctl,
727 .init = raw_init,
728 .setsockopt = raw_setsockopt,
729 .getsockopt = raw_getsockopt,
730 .sendmsg = raw_sendmsg,
731 .recvmsg = raw_recvmsg,
732 .bind = raw_bind,
733 .backlog_rcv = raw_rcv_skb,
734 .hash = raw_v4_hash,
735 .unhash = raw_v4_unhash,
736 .obj_size = sizeof(struct raw_sock),
737};
738
739#ifdef CONFIG_PROC_FS
740struct raw_iter_state {
741 int bucket;
742};
743
744#define raw_seq_private(seq) ((struct raw_iter_state *)(seq)->private)
745
746static struct sock *raw_get_first(struct seq_file *seq)
747{
748 struct sock *sk;
749 struct raw_iter_state* state = raw_seq_private(seq);
750
751 for (state->bucket = 0; state->bucket < RAWV4_HTABLE_SIZE; ++state->bucket) {
752 struct hlist_node *node;
753
754 sk_for_each(sk, node, &raw_v4_htable[state->bucket])
755 if (sk->sk_family == PF_INET)
756 goto found;
757 }
758 sk = NULL;
759found:
760 return sk;
761}
762
763static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
764{
765 struct raw_iter_state* state = raw_seq_private(seq);
766
767 do {
768 sk = sk_next(sk);
769try_again:
770 ;
771 } while (sk && sk->sk_family != PF_INET);
772
773 if (!sk && ++state->bucket < RAWV4_HTABLE_SIZE) {
774 sk = sk_head(&raw_v4_htable[state->bucket]);
775 goto try_again;
776 }
777 return sk;
778}
779
780static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
781{
782 struct sock *sk = raw_get_first(seq);
783
784 if (sk)
785 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
786 --pos;
787 return pos ? NULL : sk;
788}
789
790static void *raw_seq_start(struct seq_file *seq, loff_t *pos)
791{
792 read_lock(&raw_v4_lock);
793 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
794}
795
796static void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
797{
798 struct sock *sk;
799
800 if (v == SEQ_START_TOKEN)
801 sk = raw_get_first(seq);
802 else
803 sk = raw_get_next(seq, v);
804 ++*pos;
805 return sk;
806}
807
808static void raw_seq_stop(struct seq_file *seq, void *v)
809{
810 read_unlock(&raw_v4_lock);
811}
812
813static __inline__ char *get_raw_sock(struct sock *sp, char *tmpbuf, int i)
814{
815 struct inet_sock *inet = inet_sk(sp);
816 unsigned int dest = inet->daddr,
817 src = inet->rcv_saddr;
818 __u16 destp = 0,
819 srcp = inet->num;
820
821 sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X"
822 " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p",
823 i, src, srcp, dest, destp, sp->sk_state,
824 atomic_read(&sp->sk_wmem_alloc),
825 atomic_read(&sp->sk_rmem_alloc),
826 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
827 atomic_read(&sp->sk_refcnt), sp);
828 return tmpbuf;
829}
830
831static int raw_seq_show(struct seq_file *seq, void *v)
832{
833 char tmpbuf[129];
834
835 if (v == SEQ_START_TOKEN)
836 seq_printf(seq, "%-127s\n",
837 " sl local_address rem_address st tx_queue "
838 "rx_queue tr tm->when retrnsmt uid timeout "
839 "inode");
840 else {
841 struct raw_iter_state *state = raw_seq_private(seq);
842
843 seq_printf(seq, "%-127s\n",
844 get_raw_sock(v, tmpbuf, state->bucket));
845 }
846 return 0;
847}
848
849static struct seq_operations raw_seq_ops = {
850 .start = raw_seq_start,
851 .next = raw_seq_next,
852 .stop = raw_seq_stop,
853 .show = raw_seq_show,
854};
855
856static int raw_seq_open(struct inode *inode, struct file *file)
857{
858 struct seq_file *seq;
859 int rc = -ENOMEM;
860 struct raw_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
861
862 if (!s)
863 goto out;
864 rc = seq_open(file, &raw_seq_ops);
865 if (rc)
866 goto out_kfree;
867
868 seq = file->private_data;
869 seq->private = s;
870 memset(s, 0, sizeof(*s));
871out:
872 return rc;
873out_kfree:
874 kfree(s);
875 goto out;
876}
877
878static struct file_operations raw_seq_fops = {
879 .owner = THIS_MODULE,
880 .open = raw_seq_open,
881 .read = seq_read,
882 .llseek = seq_lseek,
883 .release = seq_release_private,
884};
885
886int __init raw_proc_init(void)
887{
888 if (!proc_net_fops_create("raw", S_IRUGO, &raw_seq_fops))
889 return -ENOMEM;
890 return 0;
891}
892
893void __init raw_proc_exit(void)
894{
895 proc_net_remove("raw");
896}
897#endif /* CONFIG_PROC_FS */
Clone of davem's net-next-2.6 tree