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[net-next-2.6.git] / net / ipv4 / raw.c
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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 *
10 * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
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>
62#include <linux/tcp.h>
63#include <linux/skbuff.h>
64#include <net/dst.h>
65#include <net/sock.h>
66#include <linux/gfp.h>
67#include <linux/ip.h>
68#include <linux/net.h>
69#include <net/ip.h>
70#include <net/icmp.h>
71#include <net/udp.h>
72#include <net/raw.h>
73#include <net/snmp.h>
74#include <net/inet_common.h>
75#include <net/checksum.h>
76#include <net/xfrm.h>
77#include <linux/rtnetlink.h>
78#include <linux/proc_fs.h>
79#include <linux/seq_file.h>
80#include <linux/netfilter.h>
81#include <linux/netfilter_ipv4.h>
82
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 */
153void raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
154{
155 struct sock *sk;
156 struct hlist_head *head;
157
158 read_lock(&raw_v4_lock);
159 head = &raw_v4_htable[hash];
160 if (hlist_empty(head))
161 goto out;
162 sk = __raw_v4_lookup(__sk_head(head), iph->protocol,
163 iph->saddr, iph->daddr,
164 skb->dev->ifindex);
165
166 while (sk) {
167 if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) {
168 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
169
170 /* Not releasing hash table! */
171 if (clone)
172 raw_rcv(sk, clone);
173 }
174 sk = __raw_v4_lookup(sk_next(sk), iph->protocol,
175 iph->saddr, iph->daddr,
176 skb->dev->ifindex);
177 }
178out:
179 read_unlock(&raw_v4_lock);
180}
181
182void raw_err (struct sock *sk, struct sk_buff *skb, u32 info)
183{
184 struct inet_sock *inet = inet_sk(sk);
185 int type = skb->h.icmph->type;
186 int code = skb->h.icmph->code;
187 int err = 0;
188 int harderr = 0;
189
190 /* Report error on raw socket, if:
191 1. User requested ip_recverr.
192 2. Socket is connected (otherwise the error indication
193 is useless without ip_recverr and error is hard.
194 */
195 if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED)
196 return;
197
198 switch (type) {
199 default:
200 case ICMP_TIME_EXCEEDED:
201 err = EHOSTUNREACH;
202 break;
203 case ICMP_SOURCE_QUENCH:
204 return;
205 case ICMP_PARAMETERPROB:
206 err = EPROTO;
207 harderr = 1;
208 break;
209 case ICMP_DEST_UNREACH:
210 err = EHOSTUNREACH;
211 if (code > NR_ICMP_UNREACH)
212 break;
213 err = icmp_err_convert[code].errno;
214 harderr = icmp_err_convert[code].fatal;
215 if (code == ICMP_FRAG_NEEDED) {
216 harderr = inet->pmtudisc != IP_PMTUDISC_DONT;
217 err = EMSGSIZE;
218 }
219 }
220
221 if (inet->recverr) {
222 struct iphdr *iph = (struct iphdr*)skb->data;
223 u8 *payload = skb->data + (iph->ihl << 2);
224
225 if (inet->hdrincl)
226 payload = skb->data;
227 ip_icmp_error(sk, skb, err, 0, info, payload);
228 }
229
230 if (inet->recverr || harderr) {
231 sk->sk_err = err;
232 sk->sk_error_report(sk);
233 }
234}
235
236static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb)
237{
238 /* Charge it to the socket. */
239
240 if (sock_queue_rcv_skb(sk, skb) < 0) {
241 /* FIXME: increment a raw drops counter here */
242 kfree_skb(skb);
243 return NET_RX_DROP;
244 }
245
246 return NET_RX_SUCCESS;
247}
248
249int raw_rcv(struct sock *sk, struct sk_buff *skb)
250{
251 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
252 kfree_skb(skb);
253 return NET_RX_DROP;
254 }
255
256 skb_push(skb, skb->data - skb->nh.raw);
257
258 raw_rcv_skb(sk, skb);
259 return 0;
260}
261
262static int raw_send_hdrinc(struct sock *sk, void *from, int length,
263 struct rtable *rt,
264 unsigned int flags)
265{
266 struct inet_sock *inet = inet_sk(sk);
267 int hh_len;
268 struct iphdr *iph;
269 struct sk_buff *skb;
270 int err;
271
272 if (length > rt->u.dst.dev->mtu) {
273 ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->dport,
274 rt->u.dst.dev->mtu);
275 return -EMSGSIZE;
276 }
277 if (flags&MSG_PROBE)
278 goto out;
279
280 hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
281
282 skb = sock_alloc_send_skb(sk, length+hh_len+15,
283 flags&MSG_DONTWAIT, &err);
284 if (skb == NULL)
285 goto error;
286 skb_reserve(skb, hh_len);
287
288 skb->priority = sk->sk_priority;
289 skb->dst = dst_clone(&rt->u.dst);
290
291 skb->nh.iph = iph = (struct iphdr *)skb_put(skb, length);
292
293 skb->ip_summed = CHECKSUM_NONE;
294
295 skb->h.raw = skb->nh.raw;
296 err = memcpy_fromiovecend((void *)iph, from, 0, length);
297 if (err)
298 goto error_fault;
299
300 /* We don't modify invalid header */
301 if (length >= sizeof(*iph) && iph->ihl * 4 <= length) {
302 if (!iph->saddr)
303 iph->saddr = rt->rt_src;
304 iph->check = 0;
305 iph->tot_len = htons(length);
306 if (!iph->id)
307 ip_select_ident(iph, &rt->u.dst, NULL);
308
309 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
310 }
311
312 err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
313 dst_output);
314 if (err > 0)
315 err = inet->recverr ? net_xmit_errno(err) : 0;
316 if (err)
317 goto error;
318out:
319 return 0;
320
321error_fault:
322 err = -EFAULT;
323 kfree_skb(skb);
324error:
325 IP_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
326 return err;
327}
328
329static void raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
330{
331 struct iovec *iov;
332 u8 __user *type = NULL;
333 u8 __user *code = NULL;
334 int probed = 0;
335 int i;
336
337 if (!msg->msg_iov)
338 return;
339
340 for (i = 0; i < msg->msg_iovlen; i++) {
341 iov = &msg->msg_iov[i];
342 if (!iov)
343 continue;
344
345 switch (fl->proto) {
346 case IPPROTO_ICMP:
347 /* check if one-byte field is readable or not. */
348 if (iov->iov_base && iov->iov_len < 1)
349 break;
350
351 if (!type) {
352 type = iov->iov_base;
353 /* check if code field is readable or not. */
354 if (iov->iov_len > 1)
355 code = type + 1;
356 } else if (!code)
357 code = iov->iov_base;
358
359 if (type && code) {
360 get_user(fl->fl_icmp_type, type);
361 __get_user(fl->fl_icmp_code, code);
362 probed = 1;
363 }
364 break;
365 default:
366 probed = 1;
367 break;
368 }
369 if (probed)
370 break;
371 }
372}
373
374static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
375 size_t len)
376{
377 struct inet_sock *inet = inet_sk(sk);
378 struct ipcm_cookie ipc;
379 struct rtable *rt = NULL;
380 int free = 0;
381 u32 daddr;
382 u32 saddr;
383 u8 tos;
384 int err;
385
386 err = -EMSGSIZE;
387 if (len < 0 || len > 0xFFFF)
388 goto out;
389
390 /*
391 * Check the flags.
392 */
393
394 err = -EOPNOTSUPP;
395 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
396 goto out; /* compatibility */
397
398 /*
399 * Get and verify the address.
400 */
401
402 if (msg->msg_namelen) {
403 struct sockaddr_in *usin = (struct sockaddr_in*)msg->msg_name;
404 err = -EINVAL;
405 if (msg->msg_namelen < sizeof(*usin))
406 goto out;
407 if (usin->sin_family != AF_INET) {
408 static int complained;
409 if (!complained++)
410 printk(KERN_INFO "%s forgot to set AF_INET in "
411 "raw sendmsg. Fix it!\n",
412 current->comm);
413 err = -EAFNOSUPPORT;
414 if (usin->sin_family)
415 goto out;
416 }
417 daddr = usin->sin_addr.s_addr;
418 /* ANK: I did not forget to get protocol from port field.
419 * I just do not know, who uses this weirdness.
420 * IP_HDRINCL is much more convenient.
421 */
422 } else {
423 err = -EDESTADDRREQ;
424 if (sk->sk_state != TCP_ESTABLISHED)
425 goto out;
426 daddr = inet->daddr;
427 }
428
429 ipc.addr = inet->saddr;
430 ipc.opt = NULL;
431 ipc.oif = sk->sk_bound_dev_if;
432
433 if (msg->msg_controllen) {
434 err = ip_cmsg_send(msg, &ipc);
435 if (err)
436 goto out;
437 if (ipc.opt)
438 free = 1;
439 }
440
441 saddr = ipc.addr;
442 ipc.addr = daddr;
443
444 if (!ipc.opt)
445 ipc.opt = inet->opt;
446
447 if (ipc.opt) {
448 err = -EINVAL;
449 /* Linux does not mangle headers on raw sockets,
450 * so that IP options + IP_HDRINCL is non-sense.
451 */
452 if (inet->hdrincl)
453 goto done;
454 if (ipc.opt->srr) {
455 if (!daddr)
456 goto done;
457 daddr = ipc.opt->faddr;
458 }
459 }
460 tos = RT_CONN_FLAGS(sk);
461 if (msg->msg_flags & MSG_DONTROUTE)
462 tos |= RTO_ONLINK;
463
464 if (MULTICAST(daddr)) {
465 if (!ipc.oif)
466 ipc.oif = inet->mc_index;
467 if (!saddr)
468 saddr = inet->mc_addr;
469 }
470
471 {
472 struct flowi fl = { .oif = ipc.oif,
473 .nl_u = { .ip4_u =
474 { .daddr = daddr,
475 .saddr = saddr,
476 .tos = tos } },
477 .proto = inet->hdrincl ? IPPROTO_RAW :
478 sk->sk_protocol,
479 };
480 if (!inet->hdrincl)
481 raw_probe_proto_opt(&fl, msg);
482
483 err = ip_route_output_flow(&rt, &fl, sk, !(msg->msg_flags&MSG_DONTWAIT));
484 }
485 if (err)
486 goto done;
487
488 err = -EACCES;
489 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
490 goto done;
491
492 if (msg->msg_flags & MSG_CONFIRM)
493 goto do_confirm;
494back_from_confirm:
495
496 if (inet->hdrincl)
497 err = raw_send_hdrinc(sk, msg->msg_iov, len,
498 rt, msg->msg_flags);
499
500 else {
501 if (!ipc.addr)
502 ipc.addr = rt->rt_dst;
503 lock_sock(sk);
504 err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
505 &ipc, rt, msg->msg_flags);
506 if (err)
507 ip_flush_pending_frames(sk);
508 else if (!(msg->msg_flags & MSG_MORE))
509 err = ip_push_pending_frames(sk);
510 release_sock(sk);
511 }
512done:
513 if (free)
514 kfree(ipc.opt);
515 ip_rt_put(rt);
516
517out: return err < 0 ? err : len;
518
519do_confirm:
520 dst_confirm(&rt->u.dst);
521 if (!(msg->msg_flags & MSG_PROBE) || len)
522 goto back_from_confirm;
523 err = 0;
524 goto done;
525}
526
527static void raw_close(struct sock *sk, long timeout)
528{
529 /*
530 * Raw sockets may have direct kernel refereneces. Kill them.
531 */
532 ip_ra_control(sk, 0, NULL);
533
534 sk_common_release(sk);
535}
536
537/* This gets rid of all the nasties in af_inet. -DaveM */
538static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
539{
540 struct inet_sock *inet = inet_sk(sk);
541 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
542 int ret = -EINVAL;
543 int chk_addr_ret;
544
545 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
546 goto out;
547 chk_addr_ret = inet_addr_type(addr->sin_addr.s_addr);
548 ret = -EADDRNOTAVAIL;
549 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
550 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
551 goto out;
552 inet->rcv_saddr = inet->saddr = addr->sin_addr.s_addr;
553 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
554 inet->saddr = 0; /* Use device */
555 sk_dst_reset(sk);
556 ret = 0;
557out: return ret;
558}
559
560/*
561 * This should be easy, if there is something there
562 * we return it, otherwise we block.
563 */
564
565static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
566 size_t len, int noblock, int flags, int *addr_len)
567{
568 struct inet_sock *inet = inet_sk(sk);
569 size_t copied = 0;
570 int err = -EOPNOTSUPP;
571 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
572 struct sk_buff *skb;
573
574 if (flags & MSG_OOB)
575 goto out;
576
577 if (addr_len)
578 *addr_len = sizeof(*sin);
579
580 if (flags & MSG_ERRQUEUE) {
581 err = ip_recv_error(sk, msg, len);
582 goto out;
583 }
584
585 skb = skb_recv_datagram(sk, flags, noblock, &err);
586 if (!skb)
587 goto out;
588
589 copied = skb->len;
590 if (len < copied) {
591 msg->msg_flags |= MSG_TRUNC;
592 copied = len;
593 }
594
595 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
596 if (err)
597 goto done;
598
599 sock_recv_timestamp(msg, sk, skb);
600
601 /* Copy the address. */
602 if (sin) {
603 sin->sin_family = AF_INET;
604 sin->sin_addr.s_addr = skb->nh.iph->saddr;
605 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
606 }
607 if (inet->cmsg_flags)
608 ip_cmsg_recv(msg, skb);
609 if (flags & MSG_TRUNC)
610 copied = skb->len;
611done:
612 skb_free_datagram(sk, skb);
613out: return err ? err : copied;
614}
615
616static int raw_init(struct sock *sk)
617{
618 struct raw_sock *rp = raw_sk(sk);
619
620 if (inet_sk(sk)->num == IPPROTO_ICMP)
621 memset(&rp->filter, 0, sizeof(rp->filter));
622 return 0;
623}
624
625static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
626{
627 if (optlen > sizeof(struct icmp_filter))
628 optlen = sizeof(struct icmp_filter);
629 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
630 return -EFAULT;
631 return 0;
632}
633
634static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
635{
636 int len, ret = -EFAULT;
637
638 if (get_user(len, optlen))
639 goto out;
640 ret = -EINVAL;
641 if (len < 0)
642 goto out;
643 if (len > sizeof(struct icmp_filter))
644 len = sizeof(struct icmp_filter);
645 ret = -EFAULT;
646 if (put_user(len, optlen) ||
647 copy_to_user(optval, &raw_sk(sk)->filter, len))
648 goto out;
649 ret = 0;
650out: return ret;
651}
652
653static int raw_setsockopt(struct sock *sk, int level, int optname,
654 char __user *optval, int optlen)
655{
656 if (level != SOL_RAW)
657 return ip_setsockopt(sk, level, optname, optval, optlen);
658
659 if (optname == ICMP_FILTER) {
660 if (inet_sk(sk)->num != IPPROTO_ICMP)
661 return -EOPNOTSUPP;
662 else
663 return raw_seticmpfilter(sk, optval, optlen);
664 }
665 return -ENOPROTOOPT;
666}
667
668static int raw_getsockopt(struct sock *sk, int level, int optname,
669 char __user *optval, int __user *optlen)
670{
671 if (level != SOL_RAW)
672 return ip_getsockopt(sk, level, optname, optval, optlen);
673
674 if (optname == ICMP_FILTER) {
675 if (inet_sk(sk)->num != IPPROTO_ICMP)
676 return -EOPNOTSUPP;
677 else
678 return raw_geticmpfilter(sk, optval, optlen);
679 }
680 return -ENOPROTOOPT;
681}
682
683static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
684{
685 switch (cmd) {
686 case SIOCOUTQ: {
687 int amount = atomic_read(&sk->sk_wmem_alloc);
688 return put_user(amount, (int __user *)arg);
689 }
690 case SIOCINQ: {
691 struct sk_buff *skb;
692 int amount = 0;
693
694 spin_lock_irq(&sk->sk_receive_queue.lock);
695 skb = skb_peek(&sk->sk_receive_queue);
696 if (skb != NULL)
697 amount = skb->len;
698 spin_unlock_irq(&sk->sk_receive_queue.lock);
699 return put_user(amount, (int __user *)arg);
700 }
701
702 default:
703#ifdef CONFIG_IP_MROUTE
704 return ipmr_ioctl(sk, cmd, (void __user *)arg);
705#else
706 return -ENOIOCTLCMD;
707#endif
708 }
709}
710
711struct proto raw_prot = {
712 .name = "RAW",
713 .owner = THIS_MODULE,
714 .close = raw_close,
715 .connect = ip4_datagram_connect,
716 .disconnect = udp_disconnect,
717 .ioctl = raw_ioctl,
718 .init = raw_init,
719 .setsockopt = raw_setsockopt,
720 .getsockopt = raw_getsockopt,
721 .sendmsg = raw_sendmsg,
722 .recvmsg = raw_recvmsg,
723 .bind = raw_bind,
724 .backlog_rcv = raw_rcv_skb,
725 .hash = raw_v4_hash,
726 .unhash = raw_v4_unhash,
727 .obj_size = sizeof(struct raw_sock),
728};
729
730#ifdef CONFIG_PROC_FS
731struct raw_iter_state {
732 int bucket;
733};
734
735#define raw_seq_private(seq) ((struct raw_iter_state *)(seq)->private)
736
737static struct sock *raw_get_first(struct seq_file *seq)
738{
739 struct sock *sk;
740 struct raw_iter_state* state = raw_seq_private(seq);
741
742 for (state->bucket = 0; state->bucket < RAWV4_HTABLE_SIZE; ++state->bucket) {
743 struct hlist_node *node;
744
745 sk_for_each(sk, node, &raw_v4_htable[state->bucket])
746 if (sk->sk_family == PF_INET)
747 goto found;
748 }
749 sk = NULL;
750found:
751 return sk;
752}
753
754static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
755{
756 struct raw_iter_state* state = raw_seq_private(seq);
757
758 do {
759 sk = sk_next(sk);
760try_again:
761 ;
762 } while (sk && sk->sk_family != PF_INET);
763
764 if (!sk && ++state->bucket < RAWV4_HTABLE_SIZE) {
765 sk = sk_head(&raw_v4_htable[state->bucket]);
766 goto try_again;
767 }
768 return sk;
769}
770
771static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
772{
773 struct sock *sk = raw_get_first(seq);
774
775 if (sk)
776 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
777 --pos;
778 return pos ? NULL : sk;
779}
780
781static void *raw_seq_start(struct seq_file *seq, loff_t *pos)
782{
783 read_lock(&raw_v4_lock);
784 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
785}
786
787static void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
788{
789 struct sock *sk;
790
791 if (v == SEQ_START_TOKEN)
792 sk = raw_get_first(seq);
793 else
794 sk = raw_get_next(seq, v);
795 ++*pos;
796 return sk;
797}
798
799static void raw_seq_stop(struct seq_file *seq, void *v)
800{
801 read_unlock(&raw_v4_lock);
802}
803
804static __inline__ char *get_raw_sock(struct sock *sp, char *tmpbuf, int i)
805{
806 struct inet_sock *inet = inet_sk(sp);
807 unsigned int dest = inet->daddr,
808 src = inet->rcv_saddr;
809 __u16 destp = 0,
810 srcp = inet->num;
811
812 sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X"
813 " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p",
814 i, src, srcp, dest, destp, sp->sk_state,
815 atomic_read(&sp->sk_wmem_alloc),
816 atomic_read(&sp->sk_rmem_alloc),
817 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
818 atomic_read(&sp->sk_refcnt), sp);
819 return tmpbuf;
820}
821
822static int raw_seq_show(struct seq_file *seq, void *v)
823{
824 char tmpbuf[129];
825
826 if (v == SEQ_START_TOKEN)
827 seq_printf(seq, "%-127s\n",
828 " sl local_address rem_address st tx_queue "
829 "rx_queue tr tm->when retrnsmt uid timeout "
830 "inode");
831 else {
832 struct raw_iter_state *state = raw_seq_private(seq);
833
834 seq_printf(seq, "%-127s\n",
835 get_raw_sock(v, tmpbuf, state->bucket));
836 }
837 return 0;
838}
839
840static struct seq_operations raw_seq_ops = {
841 .start = raw_seq_start,
842 .next = raw_seq_next,
843 .stop = raw_seq_stop,
844 .show = raw_seq_show,
845};
846
847static int raw_seq_open(struct inode *inode, struct file *file)
848{
849 struct seq_file *seq;
850 int rc = -ENOMEM;
851 struct raw_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
852
853 if (!s)
854 goto out;
855 rc = seq_open(file, &raw_seq_ops);
856 if (rc)
857 goto out_kfree;
858
859 seq = file->private_data;
860 seq->private = s;
861 memset(s, 0, sizeof(*s));
862out:
863 return rc;
864out_kfree:
865 kfree(s);
866 goto out;
867}
868
869static struct file_operations raw_seq_fops = {
870 .owner = THIS_MODULE,
871 .open = raw_seq_open,
872 .read = seq_read,
873 .llseek = seq_lseek,
874 .release = seq_release_private,
875};
876
877int __init raw_proc_init(void)
878{
879 if (!proc_net_fops_create("raw", S_IRUGO, &raw_seq_fops))
880 return -ENOMEM;
881 return 0;
882}
883
884void __init raw_proc_exit(void)
885{
886 proc_net_remove("raw");
887}
888#endif /* CONFIG_PROC_FS */
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