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.
6 * RAW - implementation of IP "raw" sockets.
9 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Alan Cox : verify_area() fixed up
13 * Alan Cox : ICMP error handling
14 * Alan Cox : EMSGSIZE if you send too big a packet
15 * Alan Cox : Now uses generic datagrams and shared
16 * skbuff library. No more peek crashes,
18 * Alan Cox : Checks sk->broadcast.
19 * Alan Cox : Uses skb_free_datagram/skb_copy_datagram
20 * Alan Cox : Raw passes ip options too
21 * Alan Cox : Setsocketopt added
22 * Alan Cox : Fixed error return for broadcasts
23 * Alan Cox : Removed wake_up calls
24 * Alan Cox : Use ttl/tos
25 * Alan Cox : Cleaned up old debugging
26 * Alan Cox : Use new kernel side addresses
27 * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets.
28 * Alan Cox : BSD style RAW socket demultiplexing.
29 * Alan Cox : Beginnings of mrouted support.
30 * Alan Cox : Added IP_HDRINCL option.
31 * Alan Cox : Skip broadcast check if BSDism set.
32 * David S. Miller : New socket lookup architecture.
34 * This program is free software; you can redistribute it and/or
35 * modify it under the terms of the GNU General Public License
36 * as published by the Free Software Foundation; either version
37 * 2 of the License, or (at your option) any later version.
40 #include <linux/types.h>
41 #include <linux/atomic.h>
42 #include <asm/byteorder.h>
43 #include <asm/current.h>
44 #include <asm/uaccess.h>
45 #include <asm/ioctls.h>
46 #include <linux/stddef.h>
47 #include <linux/slab.h>
48 #include <linux/errno.h>
49 #include <linux/kernel.h>
50 #include <linux/export.h>
51 #include <linux/spinlock.h>
52 #include <linux/sockios.h>
53 #include <linux/socket.h>
55 #include <linux/mroute.h>
56 #include <linux/netdevice.h>
57 #include <linux/in_route.h>
58 #include <linux/route.h>
59 #include <linux/skbuff.h>
60 #include <linux/igmp.h>
61 #include <net/net_namespace.h>
65 #include <linux/net.h>
71 #include <net/tcp_states.h>
72 #include <net/inet_common.h>
73 #include <net/checksum.h>
75 #include <linux/rtnetlink.h>
76 #include <linux/proc_fs.h>
77 #include <linux/seq_file.h>
78 #include <linux/netfilter.h>
79 #include <linux/netfilter_ipv4.h>
80 #include <linux/compat.h>
81 #include <linux/uio.h>
92 static struct raw_hashinfo raw_v4_hashinfo
= {
93 .lock
= __RW_LOCK_UNLOCKED(raw_v4_hashinfo
.lock
),
96 void raw_hash_sk(struct sock
*sk
)
98 struct raw_hashinfo
*h
= sk
->sk_prot
->h
.raw_hash
;
99 struct hlist_head
*head
;
101 head
= &h
->ht
[inet_sk(sk
)->inet_num
& (RAW_HTABLE_SIZE
- 1)];
103 write_lock_bh(&h
->lock
);
104 sk_add_node(sk
, head
);
105 sock_prot_inuse_add(sock_net(sk
), sk
->sk_prot
, 1);
106 write_unlock_bh(&h
->lock
);
108 EXPORT_SYMBOL_GPL(raw_hash_sk
);
110 void raw_unhash_sk(struct sock
*sk
)
112 struct raw_hashinfo
*h
= sk
->sk_prot
->h
.raw_hash
;
114 write_lock_bh(&h
->lock
);
115 if (sk_del_node_init(sk
))
116 sock_prot_inuse_add(sock_net(sk
), sk
->sk_prot
, -1);
117 write_unlock_bh(&h
->lock
);
119 EXPORT_SYMBOL_GPL(raw_unhash_sk
);
121 static struct sock
*__raw_v4_lookup(struct net
*net
, struct sock
*sk
,
122 unsigned short num
, __be32 raddr
, __be32 laddr
, int dif
)
124 sk_for_each_from(sk
) {
125 struct inet_sock
*inet
= inet_sk(sk
);
127 if (net_eq(sock_net(sk
), net
) && inet
->inet_num
== num
&&
128 !(inet
->inet_daddr
&& inet
->inet_daddr
!= raddr
) &&
129 !(inet
->inet_rcv_saddr
&& inet
->inet_rcv_saddr
!= laddr
) &&
130 !(sk
->sk_bound_dev_if
&& sk
->sk_bound_dev_if
!= dif
))
131 goto found
; /* gotcha */
142 static int icmp_filter(const struct sock
*sk
, const struct sk_buff
*skb
)
145 const struct icmphdr
*hdr
;
147 hdr
= skb_header_pointer(skb
, skb_transport_offset(skb
),
148 sizeof(_hdr
), &_hdr
);
152 if (hdr
->type
< 32) {
153 __u32 data
= raw_sk(sk
)->filter
.data
;
155 return ((1U << hdr
->type
) & data
) != 0;
158 /* Do not block unknown ICMP types */
162 /* IP input processing comes here for RAW socket delivery.
163 * Caller owns SKB, so we must make clones.
165 * RFC 1122: SHOULD pass TOS value up to the transport layer.
166 * -> It does. And not only TOS, but all IP header.
168 static int raw_v4_input(struct sk_buff
*skb
, const struct iphdr
*iph
, int hash
)
171 struct hlist_head
*head
;
175 read_lock(&raw_v4_hashinfo
.lock
);
176 head
= &raw_v4_hashinfo
.ht
[hash
];
177 if (hlist_empty(head
))
180 net
= dev_net(skb
->dev
);
181 sk
= __raw_v4_lookup(net
, __sk_head(head
), iph
->protocol
,
182 iph
->saddr
, iph
->daddr
,
187 if ((iph
->protocol
!= IPPROTO_ICMP
|| !icmp_filter(sk
, skb
)) &&
188 ip_mc_sf_allow(sk
, iph
->daddr
, iph
->saddr
,
189 skb
->dev
->ifindex
)) {
190 struct sk_buff
*clone
= skb_clone(skb
, GFP_ATOMIC
);
192 /* Not releasing hash table! */
196 sk
= __raw_v4_lookup(net
, sk_next(sk
), iph
->protocol
,
197 iph
->saddr
, iph
->daddr
,
201 read_unlock(&raw_v4_hashinfo
.lock
);
205 int raw_local_deliver(struct sk_buff
*skb
, int protocol
)
210 hash
= protocol
& (RAW_HTABLE_SIZE
- 1);
211 raw_sk
= sk_head(&raw_v4_hashinfo
.ht
[hash
]);
213 /* If there maybe a raw socket we must check - if not we
216 if (raw_sk
&& !raw_v4_input(skb
, ip_hdr(skb
), hash
))
219 return raw_sk
!= NULL
;
223 static void raw_err(struct sock
*sk
, struct sk_buff
*skb
, u32 info
)
225 struct inet_sock
*inet
= inet_sk(sk
);
226 const int type
= icmp_hdr(skb
)->type
;
227 const int code
= icmp_hdr(skb
)->code
;
231 if (type
== ICMP_DEST_UNREACH
&& code
== ICMP_FRAG_NEEDED
)
232 ipv4_sk_update_pmtu(skb
, sk
, info
);
233 else if (type
== ICMP_REDIRECT
) {
234 ipv4_sk_redirect(skb
, sk
);
238 /* Report error on raw socket, if:
239 1. User requested ip_recverr.
240 2. Socket is connected (otherwise the error indication
241 is useless without ip_recverr and error is hard.
243 if (!inet
->recverr
&& sk
->sk_state
!= TCP_ESTABLISHED
)
248 case ICMP_TIME_EXCEEDED
:
251 case ICMP_SOURCE_QUENCH
:
253 case ICMP_PARAMETERPROB
:
257 case ICMP_DEST_UNREACH
:
259 if (code
> NR_ICMP_UNREACH
)
261 err
= icmp_err_convert
[code
].errno
;
262 harderr
= icmp_err_convert
[code
].fatal
;
263 if (code
== ICMP_FRAG_NEEDED
) {
264 harderr
= inet
->pmtudisc
!= IP_PMTUDISC_DONT
;
270 const struct iphdr
*iph
= (const struct iphdr
*)skb
->data
;
271 u8
*payload
= skb
->data
+ (iph
->ihl
<< 2);
275 ip_icmp_error(sk
, skb
, err
, 0, info
, payload
);
278 if (inet
->recverr
|| harderr
) {
280 sk
->sk_error_report(sk
);
284 void raw_icmp_error(struct sk_buff
*skb
, int protocol
, u32 info
)
288 const struct iphdr
*iph
;
291 hash
= protocol
& (RAW_HTABLE_SIZE
- 1);
293 read_lock(&raw_v4_hashinfo
.lock
);
294 raw_sk
= sk_head(&raw_v4_hashinfo
.ht
[hash
]);
296 iph
= (const struct iphdr
*)skb
->data
;
297 net
= dev_net(skb
->dev
);
299 while ((raw_sk
= __raw_v4_lookup(net
, raw_sk
, protocol
,
300 iph
->daddr
, iph
->saddr
,
301 skb
->dev
->ifindex
)) != NULL
) {
302 raw_err(raw_sk
, skb
, info
);
303 raw_sk
= sk_next(raw_sk
);
304 iph
= (const struct iphdr
*)skb
->data
;
307 read_unlock(&raw_v4_hashinfo
.lock
);
310 static int raw_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
312 /* Charge it to the socket. */
314 ipv4_pktinfo_prepare(sk
, skb
);
315 if (sock_queue_rcv_skb(sk
, skb
) < 0) {
320 return NET_RX_SUCCESS
;
323 int raw_rcv(struct sock
*sk
, struct sk_buff
*skb
)
325 if (!xfrm4_policy_check(sk
, XFRM_POLICY_IN
, skb
)) {
326 atomic_inc(&sk
->sk_drops
);
332 skb_push(skb
, skb
->data
- skb_network_header(skb
));
334 raw_rcv_skb(sk
, skb
);
338 static int raw_send_hdrinc(struct sock
*sk
, struct flowi4
*fl4
,
339 struct msghdr
*msg
, size_t length
,
343 struct inet_sock
*inet
= inet_sk(sk
);
344 struct net
*net
= sock_net(sk
);
349 struct rtable
*rt
= *rtp
;
352 if (length
> rt
->dst
.dev
->mtu
) {
353 ip_local_error(sk
, EMSGSIZE
, fl4
->daddr
, inet
->inet_dport
,
360 hlen
= LL_RESERVED_SPACE(rt
->dst
.dev
);
361 tlen
= rt
->dst
.dev
->needed_tailroom
;
362 skb
= sock_alloc_send_skb(sk
,
363 length
+ hlen
+ tlen
+ 15,
364 flags
& MSG_DONTWAIT
, &err
);
367 skb_reserve(skb
, hlen
);
369 skb
->priority
= sk
->sk_priority
;
370 skb
->mark
= sk
->sk_mark
;
371 skb_dst_set(skb
, &rt
->dst
);
374 skb_reset_network_header(skb
);
376 skb_put(skb
, length
);
378 skb
->ip_summed
= CHECKSUM_NONE
;
380 sock_tx_timestamp(sk
, &skb_shinfo(skb
)->tx_flags
);
382 skb
->transport_header
= skb
->network_header
;
384 if (memcpy_from_msg(iph
, msg
, length
))
387 iphlen
= iph
->ihl
* 4;
390 * We don't want to modify the ip header, but we do need to
391 * be sure that it won't cause problems later along the network
392 * stack. Specifically we want to make sure that iph->ihl is a
393 * sane value. If ihl points beyond the length of the buffer passed
394 * in, reject the frame as invalid
400 if (iphlen
>= sizeof(*iph
)) {
402 iph
->saddr
= fl4
->saddr
;
404 iph
->tot_len
= htons(length
);
406 ip_select_ident(net
, skb
, NULL
);
408 iph
->check
= ip_fast_csum((unsigned char *)iph
, iph
->ihl
);
409 skb
->transport_header
+= iphlen
;
410 if (iph
->protocol
== IPPROTO_ICMP
&&
411 length
>= iphlen
+ sizeof(struct icmphdr
))
412 icmp_out_count(net
, ((struct icmphdr
*)
413 skb_transport_header(skb
))->type
);
416 err
= NF_HOOK(NFPROTO_IPV4
, NF_INET_LOCAL_OUT
,
417 net
, sk
, skb
, NULL
, rt
->dst
.dev
,
420 err
= net_xmit_errno(err
);
429 IP_INC_STATS(net
, IPSTATS_MIB_OUTDISCARDS
);
430 if (err
== -ENOBUFS
&& !inet
->recverr
)
435 static int raw_probe_proto_opt(struct raw_frag_vec
*rfv
, struct flowi4
*fl4
)
439 if (fl4
->flowi4_proto
!= IPPROTO_ICMP
)
442 /* We only need the first two bytes. */
445 err
= memcpy_from_msg(rfv
->hdr
.c
, rfv
->msg
, rfv
->hlen
);
449 fl4
->fl4_icmp_type
= rfv
->hdr
.icmph
.type
;
450 fl4
->fl4_icmp_code
= rfv
->hdr
.icmph
.code
;
455 static int raw_getfrag(void *from
, char *to
, int offset
, int len
, int odd
,
458 struct raw_frag_vec
*rfv
= from
;
460 if (offset
< rfv
->hlen
) {
461 int copy
= min(rfv
->hlen
- offset
, len
);
463 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
464 memcpy(to
, rfv
->hdr
.c
+ offset
, copy
);
466 skb
->csum
= csum_block_add(
468 csum_partial_copy_nocheck(rfv
->hdr
.c
+ offset
,
483 return ip_generic_getfrag(rfv
->msg
, to
, offset
, len
, odd
, skb
);
486 static int raw_sendmsg(struct sock
*sk
, struct msghdr
*msg
, size_t len
)
488 struct inet_sock
*inet
= inet_sk(sk
);
489 struct net
*net
= sock_net(sk
);
490 struct ipcm_cookie ipc
;
491 struct rtable
*rt
= NULL
;
498 struct ip_options_data opt_copy
;
499 struct raw_frag_vec rfv
;
510 if (msg
->msg_flags
& MSG_OOB
) /* Mirror BSD error message */
511 goto out
; /* compatibility */
514 * Get and verify the address.
517 if (msg
->msg_namelen
) {
518 DECLARE_SOCKADDR(struct sockaddr_in
*, usin
, msg
->msg_name
);
520 if (msg
->msg_namelen
< sizeof(*usin
))
522 if (usin
->sin_family
!= AF_INET
) {
523 pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n",
524 __func__
, current
->comm
);
526 if (usin
->sin_family
)
529 daddr
= usin
->sin_addr
.s_addr
;
530 /* ANK: I did not forget to get protocol from port field.
531 * I just do not know, who uses this weirdness.
532 * IP_HDRINCL is much more convenient.
536 if (sk
->sk_state
!= TCP_ESTABLISHED
)
538 daddr
= inet
->inet_daddr
;
541 ipc
.addr
= inet
->inet_saddr
;
546 ipc
.oif
= sk
->sk_bound_dev_if
;
548 if (msg
->msg_controllen
) {
549 err
= ip_cmsg_send(net
, msg
, &ipc
, false);
562 struct ip_options_rcu
*inet_opt
;
565 inet_opt
= rcu_dereference(inet
->inet_opt
);
567 memcpy(&opt_copy
, inet_opt
,
568 sizeof(*inet_opt
) + inet_opt
->opt
.optlen
);
569 ipc
.opt
= &opt_copy
.opt
;
576 /* Linux does not mangle headers on raw sockets,
577 * so that IP options + IP_HDRINCL is non-sense.
581 if (ipc
.opt
->opt
.srr
) {
584 daddr
= ipc
.opt
->opt
.faddr
;
587 tos
= get_rtconn_flags(&ipc
, sk
);
588 if (msg
->msg_flags
& MSG_DONTROUTE
)
591 if (ipv4_is_multicast(daddr
)) {
593 ipc
.oif
= inet
->mc_index
;
595 saddr
= inet
->mc_addr
;
597 ipc
.oif
= inet
->uc_index
;
599 flowi4_init_output(&fl4
, ipc
.oif
, sk
->sk_mark
, tos
,
601 inet
->hdrincl
? IPPROTO_RAW
: sk
->sk_protocol
,
602 inet_sk_flowi_flags(sk
) |
603 (inet
->hdrincl
? FLOWI_FLAG_KNOWN_NH
: 0),
606 if (!saddr
&& ipc
.oif
) {
607 err
= l3mdev_get_saddr(net
, ipc
.oif
, &fl4
);
612 if (!inet
->hdrincl
) {
616 err
= raw_probe_proto_opt(&rfv
, &fl4
);
621 security_sk_classify_flow(sk
, flowi4_to_flowi(&fl4
));
622 rt
= ip_route_output_flow(net
, &fl4
, sk
);
630 if (rt
->rt_flags
& RTCF_BROADCAST
&& !sock_flag(sk
, SOCK_BROADCAST
))
633 if (msg
->msg_flags
& MSG_CONFIRM
)
638 err
= raw_send_hdrinc(sk
, &fl4
, msg
, len
,
639 &rt
, msg
->msg_flags
);
642 sock_tx_timestamp(sk
, &ipc
.tx_flags
);
645 ipc
.addr
= fl4
.daddr
;
647 err
= ip_append_data(sk
, &fl4
, raw_getfrag
,
649 &ipc
, &rt
, msg
->msg_flags
);
651 ip_flush_pending_frames(sk
);
652 else if (!(msg
->msg_flags
& MSG_MORE
)) {
653 err
= ip_push_pending_frames(sk
, &fl4
);
654 if (err
== -ENOBUFS
&& !inet
->recverr
)
670 dst_confirm(&rt
->dst
);
671 if (!(msg
->msg_flags
& MSG_PROBE
) || len
)
672 goto back_from_confirm
;
677 static void raw_close(struct sock
*sk
, long timeout
)
680 * Raw sockets may have direct kernel references. Kill them.
682 ip_ra_control(sk
, 0, NULL
);
684 sk_common_release(sk
);
687 static void raw_destroy(struct sock
*sk
)
690 ip_flush_pending_frames(sk
);
694 /* This gets rid of all the nasties in af_inet. -DaveM */
695 static int raw_bind(struct sock
*sk
, struct sockaddr
*uaddr
, int addr_len
)
697 struct inet_sock
*inet
= inet_sk(sk
);
698 struct sockaddr_in
*addr
= (struct sockaddr_in
*) uaddr
;
702 if (sk
->sk_state
!= TCP_CLOSE
|| addr_len
< sizeof(struct sockaddr_in
))
704 chk_addr_ret
= inet_addr_type(sock_net(sk
), addr
->sin_addr
.s_addr
);
705 ret
= -EADDRNOTAVAIL
;
706 if (addr
->sin_addr
.s_addr
&& chk_addr_ret
!= RTN_LOCAL
&&
707 chk_addr_ret
!= RTN_MULTICAST
&& chk_addr_ret
!= RTN_BROADCAST
)
709 inet
->inet_rcv_saddr
= inet
->inet_saddr
= addr
->sin_addr
.s_addr
;
710 if (chk_addr_ret
== RTN_MULTICAST
|| chk_addr_ret
== RTN_BROADCAST
)
711 inet
->inet_saddr
= 0; /* Use device */
718 * This should be easy, if there is something there
719 * we return it, otherwise we block.
722 static int raw_recvmsg(struct sock
*sk
, struct msghdr
*msg
, size_t len
,
723 int noblock
, int flags
, int *addr_len
)
725 struct inet_sock
*inet
= inet_sk(sk
);
727 int err
= -EOPNOTSUPP
;
728 DECLARE_SOCKADDR(struct sockaddr_in
*, sin
, msg
->msg_name
);
734 if (flags
& MSG_ERRQUEUE
) {
735 err
= ip_recv_error(sk
, msg
, len
, addr_len
);
739 skb
= skb_recv_datagram(sk
, flags
, noblock
, &err
);
745 msg
->msg_flags
|= MSG_TRUNC
;
749 err
= skb_copy_datagram_msg(skb
, 0, msg
, copied
);
753 sock_recv_ts_and_drops(msg
, sk
, skb
);
755 /* Copy the address. */
757 sin
->sin_family
= AF_INET
;
758 sin
->sin_addr
.s_addr
= ip_hdr(skb
)->saddr
;
760 memset(&sin
->sin_zero
, 0, sizeof(sin
->sin_zero
));
761 *addr_len
= sizeof(*sin
);
763 if (inet
->cmsg_flags
)
764 ip_cmsg_recv(msg
, skb
);
765 if (flags
& MSG_TRUNC
)
768 skb_free_datagram(sk
, skb
);
775 static int raw_init(struct sock
*sk
)
777 struct raw_sock
*rp
= raw_sk(sk
);
779 if (inet_sk(sk
)->inet_num
== IPPROTO_ICMP
)
780 memset(&rp
->filter
, 0, sizeof(rp
->filter
));
784 static int raw_seticmpfilter(struct sock
*sk
, char __user
*optval
, int optlen
)
786 if (optlen
> sizeof(struct icmp_filter
))
787 optlen
= sizeof(struct icmp_filter
);
788 if (copy_from_user(&raw_sk(sk
)->filter
, optval
, optlen
))
793 static int raw_geticmpfilter(struct sock
*sk
, char __user
*optval
, int __user
*optlen
)
795 int len
, ret
= -EFAULT
;
797 if (get_user(len
, optlen
))
802 if (len
> sizeof(struct icmp_filter
))
803 len
= sizeof(struct icmp_filter
);
805 if (put_user(len
, optlen
) ||
806 copy_to_user(optval
, &raw_sk(sk
)->filter
, len
))
812 static int do_raw_setsockopt(struct sock
*sk
, int level
, int optname
,
813 char __user
*optval
, unsigned int optlen
)
815 if (optname
== ICMP_FILTER
) {
816 if (inet_sk(sk
)->inet_num
!= IPPROTO_ICMP
)
819 return raw_seticmpfilter(sk
, optval
, optlen
);
824 static int raw_setsockopt(struct sock
*sk
, int level
, int optname
,
825 char __user
*optval
, unsigned int optlen
)
827 if (level
!= SOL_RAW
)
828 return ip_setsockopt(sk
, level
, optname
, optval
, optlen
);
829 return do_raw_setsockopt(sk
, level
, optname
, optval
, optlen
);
833 static int compat_raw_setsockopt(struct sock
*sk
, int level
, int optname
,
834 char __user
*optval
, unsigned int optlen
)
836 if (level
!= SOL_RAW
)
837 return compat_ip_setsockopt(sk
, level
, optname
, optval
, optlen
);
838 return do_raw_setsockopt(sk
, level
, optname
, optval
, optlen
);
842 static int do_raw_getsockopt(struct sock
*sk
, int level
, int optname
,
843 char __user
*optval
, int __user
*optlen
)
845 if (optname
== ICMP_FILTER
) {
846 if (inet_sk(sk
)->inet_num
!= IPPROTO_ICMP
)
849 return raw_geticmpfilter(sk
, optval
, optlen
);
854 static int raw_getsockopt(struct sock
*sk
, int level
, int optname
,
855 char __user
*optval
, int __user
*optlen
)
857 if (level
!= SOL_RAW
)
858 return ip_getsockopt(sk
, level
, optname
, optval
, optlen
);
859 return do_raw_getsockopt(sk
, level
, optname
, optval
, optlen
);
863 static int compat_raw_getsockopt(struct sock
*sk
, int level
, int optname
,
864 char __user
*optval
, int __user
*optlen
)
866 if (level
!= SOL_RAW
)
867 return compat_ip_getsockopt(sk
, level
, optname
, optval
, optlen
);
868 return do_raw_getsockopt(sk
, level
, optname
, optval
, optlen
);
872 static int raw_ioctl(struct sock
*sk
, int cmd
, unsigned long arg
)
876 int amount
= sk_wmem_alloc_get(sk
);
878 return put_user(amount
, (int __user
*)arg
);
884 spin_lock_bh(&sk
->sk_receive_queue
.lock
);
885 skb
= skb_peek(&sk
->sk_receive_queue
);
888 spin_unlock_bh(&sk
->sk_receive_queue
.lock
);
889 return put_user(amount
, (int __user
*)arg
);
893 #ifdef CONFIG_IP_MROUTE
894 return ipmr_ioctl(sk
, cmd
, (void __user
*)arg
);
902 static int compat_raw_ioctl(struct sock
*sk
, unsigned int cmd
, unsigned long arg
)
909 #ifdef CONFIG_IP_MROUTE
910 return ipmr_compat_ioctl(sk
, cmd
, compat_ptr(arg
));
918 struct proto raw_prot
= {
920 .owner
= THIS_MODULE
,
922 .destroy
= raw_destroy
,
923 .connect
= ip4_datagram_connect
,
924 .disconnect
= udp_disconnect
,
927 .setsockopt
= raw_setsockopt
,
928 .getsockopt
= raw_getsockopt
,
929 .sendmsg
= raw_sendmsg
,
930 .recvmsg
= raw_recvmsg
,
932 .backlog_rcv
= raw_rcv_skb
,
933 .release_cb
= ip4_datagram_release_cb
,
935 .unhash
= raw_unhash_sk
,
936 .obj_size
= sizeof(struct raw_sock
),
937 .h
.raw_hash
= &raw_v4_hashinfo
,
939 .compat_setsockopt
= compat_raw_setsockopt
,
940 .compat_getsockopt
= compat_raw_getsockopt
,
941 .compat_ioctl
= compat_raw_ioctl
,
945 #ifdef CONFIG_PROC_FS
946 static struct sock
*raw_get_first(struct seq_file
*seq
)
949 struct raw_iter_state
*state
= raw_seq_private(seq
);
951 for (state
->bucket
= 0; state
->bucket
< RAW_HTABLE_SIZE
;
953 sk_for_each(sk
, &state
->h
->ht
[state
->bucket
])
954 if (sock_net(sk
) == seq_file_net(seq
))
962 static struct sock
*raw_get_next(struct seq_file
*seq
, struct sock
*sk
)
964 struct raw_iter_state
*state
= raw_seq_private(seq
);
970 } while (sk
&& sock_net(sk
) != seq_file_net(seq
));
972 if (!sk
&& ++state
->bucket
< RAW_HTABLE_SIZE
) {
973 sk
= sk_head(&state
->h
->ht
[state
->bucket
]);
979 static struct sock
*raw_get_idx(struct seq_file
*seq
, loff_t pos
)
981 struct sock
*sk
= raw_get_first(seq
);
984 while (pos
&& (sk
= raw_get_next(seq
, sk
)) != NULL
)
986 return pos
? NULL
: sk
;
989 void *raw_seq_start(struct seq_file
*seq
, loff_t
*pos
)
991 struct raw_iter_state
*state
= raw_seq_private(seq
);
993 read_lock(&state
->h
->lock
);
994 return *pos
? raw_get_idx(seq
, *pos
- 1) : SEQ_START_TOKEN
;
996 EXPORT_SYMBOL_GPL(raw_seq_start
);
998 void *raw_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1002 if (v
== SEQ_START_TOKEN
)
1003 sk
= raw_get_first(seq
);
1005 sk
= raw_get_next(seq
, v
);
1009 EXPORT_SYMBOL_GPL(raw_seq_next
);
1011 void raw_seq_stop(struct seq_file
*seq
, void *v
)
1013 struct raw_iter_state
*state
= raw_seq_private(seq
);
1015 read_unlock(&state
->h
->lock
);
1017 EXPORT_SYMBOL_GPL(raw_seq_stop
);
1019 static void raw_sock_seq_show(struct seq_file
*seq
, struct sock
*sp
, int i
)
1021 struct inet_sock
*inet
= inet_sk(sp
);
1022 __be32 dest
= inet
->inet_daddr
,
1023 src
= inet
->inet_rcv_saddr
;
1025 srcp
= inet
->inet_num
;
1027 seq_printf(seq
, "%4d: %08X:%04X %08X:%04X"
1028 " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n",
1029 i
, src
, srcp
, dest
, destp
, sp
->sk_state
,
1030 sk_wmem_alloc_get(sp
),
1031 sk_rmem_alloc_get(sp
),
1033 from_kuid_munged(seq_user_ns(seq
), sock_i_uid(sp
)),
1035 atomic_read(&sp
->sk_refcnt
), sp
, atomic_read(&sp
->sk_drops
));
1038 static int raw_seq_show(struct seq_file
*seq
, void *v
)
1040 if (v
== SEQ_START_TOKEN
)
1041 seq_printf(seq
, " sl local_address rem_address st tx_queue "
1042 "rx_queue tr tm->when retrnsmt uid timeout "
1043 "inode ref pointer drops\n");
1045 raw_sock_seq_show(seq
, v
, raw_seq_private(seq
)->bucket
);
1049 static const struct seq_operations raw_seq_ops
= {
1050 .start
= raw_seq_start
,
1051 .next
= raw_seq_next
,
1052 .stop
= raw_seq_stop
,
1053 .show
= raw_seq_show
,
1056 int raw_seq_open(struct inode
*ino
, struct file
*file
,
1057 struct raw_hashinfo
*h
, const struct seq_operations
*ops
)
1060 struct raw_iter_state
*i
;
1062 err
= seq_open_net(ino
, file
, ops
, sizeof(struct raw_iter_state
));
1066 i
= raw_seq_private((struct seq_file
*)file
->private_data
);
1070 EXPORT_SYMBOL_GPL(raw_seq_open
);
1072 static int raw_v4_seq_open(struct inode
*inode
, struct file
*file
)
1074 return raw_seq_open(inode
, file
, &raw_v4_hashinfo
, &raw_seq_ops
);
1077 static const struct file_operations raw_seq_fops
= {
1078 .owner
= THIS_MODULE
,
1079 .open
= raw_v4_seq_open
,
1081 .llseek
= seq_lseek
,
1082 .release
= seq_release_net
,
1085 static __net_init
int raw_init_net(struct net
*net
)
1087 if (!proc_create("raw", S_IRUGO
, net
->proc_net
, &raw_seq_fops
))
1093 static __net_exit
void raw_exit_net(struct net
*net
)
1095 remove_proc_entry("raw", net
->proc_net
);
1098 static __net_initdata
struct pernet_operations raw_net_ops
= {
1099 .init
= raw_init_net
,
1100 .exit
= raw_exit_net
,
1103 int __init
raw_proc_init(void)
1105 return register_pernet_subsys(&raw_net_ops
);
1108 void __init
raw_proc_exit(void)
1110 unregister_pernet_subsys(&raw_net_ops
);
1112 #endif /* CONFIG_PROC_FS */