blob: 23c3e5b5bb53f9e6f40ebbe8de4afd1683f9d7e5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Jesper Juhl02c30a82005-05-05 16:16:16 -07008 * Authors: Ross Biro
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
10 *
11 * Fixes:
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,
17 * no more backlogs
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.
33 *
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.
38 */
Dave Jonesbf0d5242006-09-22 14:00:29 -070039
Alan Cox715b49e2006-01-18 17:44:07 -080040#include <linux/types.h>
Arun Sharma600634972011-07-26 16:09:06 -070041#include <linux/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <asm/byteorder.h>
43#include <asm/current.h>
44#include <asm/uaccess.h>
45#include <asm/ioctls.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/stddef.h>
47#include <linux/slab.h>
48#include <linux/errno.h>
49#include <linux/aio.h>
50#include <linux/kernel.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040051#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#include <linux/spinlock.h>
53#include <linux/sockios.h>
54#include <linux/socket.h>
55#include <linux/in.h>
56#include <linux/mroute.h>
57#include <linux/netdevice.h>
58#include <linux/in_route.h>
59#include <linux/route.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <linux/skbuff.h>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020061#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include <net/dst.h>
63#include <net/sock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#include <linux/ip.h>
65#include <linux/net.h>
66#include <net/ip.h>
67#include <net/icmp.h>
68#include <net/udp.h>
69#include <net/raw.h>
70#include <net/snmp.h>
Arnaldo Carvalho de Meloc752f072005-08-09 20:08:28 -070071#include <net/tcp_states.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#include <net/inet_common.h>
73#include <net/checksum.h>
74#include <net/xfrm.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>
Eric W. Biederman709b46e2011-01-29 16:15:56 +000080#include <linux/compat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080082static struct raw_hashinfo raw_v4_hashinfo = {
Robert P. J. Day938b93a2008-03-18 00:59:23 -070083 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080084};
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -070086void raw_hash_sk(struct sock *sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -070088 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
Pavel Emelyanov65b4c502007-11-19 22:37:24 -080089 struct hlist_head *head;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Eric Dumazetc720c7e2009-10-15 06:30:45 +000091 head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)];
Pavel Emelyanov65b4c502007-11-19 22:37:24 -080092
93 write_lock_bh(&h->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 sk_add_node(sk, head);
Pavel Emelyanovc29a0bc2008-03-31 19:41:46 -070095 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
Pavel Emelyanov65b4c502007-11-19 22:37:24 -080096 write_unlock_bh(&h->lock);
97}
98EXPORT_SYMBOL_GPL(raw_hash_sk);
99
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -0700100void raw_unhash_sk(struct sock *sk)
Pavel Emelyanovab707682007-11-19 22:37:58 -0800101{
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -0700102 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
103
Pavel Emelyanovab707682007-11-19 22:37:58 -0800104 write_lock_bh(&h->lock);
105 if (sk_del_node_init(sk))
Pavel Emelyanovc29a0bc2008-03-31 19:41:46 -0700106 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
Pavel Emelyanovab707682007-11-19 22:37:58 -0800107 write_unlock_bh(&h->lock);
108}
109EXPORT_SYMBOL_GPL(raw_unhash_sk);
110
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800111static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk,
112 unsigned short num, __be32 raddr, __be32 laddr, int dif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113{
Sasha Levinb67bfe02013-02-27 17:06:00 -0800114 sk_for_each_from(sk) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 struct inet_sock *inet = inet_sk(sk);
116
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000117 if (net_eq(sock_net(sk), net) && inet->inet_num == num &&
118 !(inet->inet_daddr && inet->inet_daddr != raddr) &&
119 !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
121 goto found; /* gotcha */
122 }
123 sk = NULL;
124found:
125 return sk;
126}
127
128/*
129 * 0 - deliver
130 * 1 - block
131 */
Eric Dumazetab43ed82012-09-22 00:08:29 +0000132static int icmp_filter(const struct sock *sk, const struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133{
Eric Dumazetab43ed82012-09-22 00:08:29 +0000134 struct icmphdr _hdr;
135 const struct icmphdr *hdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Eric Dumazetab43ed82012-09-22 00:08:29 +0000137 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
138 sizeof(_hdr), &_hdr);
139 if (!hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 return 1;
141
Eric Dumazetab43ed82012-09-22 00:08:29 +0000142 if (hdr->type < 32) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 __u32 data = raw_sk(sk)->filter.data;
144
Eric Dumazetab43ed82012-09-22 00:08:29 +0000145 return ((1U << hdr->type) & data) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 }
147
148 /* Do not block unknown ICMP types */
149 return 0;
150}
151
152/* IP input processing comes here for RAW socket delivery.
153 * Caller owns SKB, so we must make clones.
154 *
155 * RFC 1122: SHOULD pass TOS value up to the transport layer.
156 * -> It does. And not only TOS, but all IP header.
157 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000158static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159{
160 struct sock *sk;
161 struct hlist_head *head;
Patrick McHardyd13964f2005-08-09 19:45:02 -0700162 int delivered = 0;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800163 struct net *net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800165 read_lock(&raw_v4_hashinfo.lock);
166 head = &raw_v4_hashinfo.ht[hash];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 if (hlist_empty(head))
168 goto out;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800169
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900170 net = dev_net(skb->dev);
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800171 sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 iph->saddr, iph->daddr,
173 skb->dev->ifindex);
174
175 while (sk) {
Patrick McHardyd13964f2005-08-09 19:45:02 -0700176 delivered = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) {
178 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
179
180 /* Not releasing hash table! */
181 if (clone)
182 raw_rcv(sk, clone);
183 }
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800184 sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 iph->saddr, iph->daddr,
186 skb->dev->ifindex);
187 }
188out:
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800189 read_unlock(&raw_v4_hashinfo.lock);
Patrick McHardyd13964f2005-08-09 19:45:02 -0700190 return delivered;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191}
192
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800193int raw_local_deliver(struct sk_buff *skb, int protocol)
194{
195 int hash;
196 struct sock *raw_sk;
197
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800198 hash = protocol & (RAW_HTABLE_SIZE - 1);
199 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800200
201 /* If there maybe a raw socket we must check - if not we
202 * don't care less
203 */
204 if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash))
205 raw_sk = NULL;
206
207 return raw_sk != NULL;
208
209}
210
211static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
213 struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo88c76642007-03-13 14:43:18 -0300214 const int type = icmp_hdr(skb)->type;
215 const int code = icmp_hdr(skb)->code;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 int err = 0;
217 int harderr = 0;
218
David S. Miller36393392012-06-14 22:21:46 -0700219 if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED)
220 ipv4_sk_update_pmtu(skb, sk, info);
Duan Jiong8d65b112013-09-20 18:21:25 +0800221 else if (type == ICMP_REDIRECT) {
David S. Miller55be7a92012-07-11 21:27:49 -0700222 ipv4_sk_redirect(skb, sk);
Duan Jiong8d65b112013-09-20 18:21:25 +0800223 return;
224 }
David S. Miller36393392012-06-14 22:21:46 -0700225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 /* Report error on raw socket, if:
227 1. User requested ip_recverr.
228 2. Socket is connected (otherwise the error indication
229 is useless without ip_recverr and error is hard.
230 */
231 if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED)
232 return;
233
234 switch (type) {
235 default:
236 case ICMP_TIME_EXCEEDED:
237 err = EHOSTUNREACH;
238 break;
239 case ICMP_SOURCE_QUENCH:
240 return;
241 case ICMP_PARAMETERPROB:
242 err = EPROTO;
243 harderr = 1;
244 break;
245 case ICMP_DEST_UNREACH:
246 err = EHOSTUNREACH;
247 if (code > NR_ICMP_UNREACH)
248 break;
249 err = icmp_err_convert[code].errno;
250 harderr = icmp_err_convert[code].fatal;
251 if (code == ICMP_FRAG_NEEDED) {
252 harderr = inet->pmtudisc != IP_PMTUDISC_DONT;
253 err = EMSGSIZE;
254 }
255 }
256
257 if (inet->recverr) {
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000258 const struct iphdr *iph = (const struct iphdr *)skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 u8 *payload = skb->data + (iph->ihl << 2);
260
261 if (inet->hdrincl)
262 payload = skb->data;
263 ip_icmp_error(sk, skb, err, 0, info, payload);
264 }
265
266 if (inet->recverr || harderr) {
267 sk->sk_err = err;
268 sk->sk_error_report(sk);
269 }
270}
271
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800272void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
273{
274 int hash;
275 struct sock *raw_sk;
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000276 const struct iphdr *iph;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800277 struct net *net;
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800278
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800279 hash = protocol & (RAW_HTABLE_SIZE - 1);
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800280
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800281 read_lock(&raw_v4_hashinfo.lock);
282 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800283 if (raw_sk != NULL) {
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000284 iph = (const struct iphdr *)skb->data;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900285 net = dev_net(skb->dev);
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800286
287 while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
288 iph->daddr, iph->saddr,
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800289 skb->dev->ifindex)) != NULL) {
290 raw_err(raw_sk, skb, info);
291 raw_sk = sk_next(raw_sk);
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000292 iph = (const struct iphdr *)skb->data;
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800293 }
294 }
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800295 read_unlock(&raw_v4_hashinfo.lock);
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800296}
297
Daniel Baluta5e73ea12012-04-15 01:34:41 +0000298static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299{
300 /* Charge it to the socket. */
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900301
Shawn Bohrerfbf88662013-10-07 11:01:40 -0500302 ipv4_pktinfo_prepare(sk, skb);
Eric Dumazetd826eb12011-11-09 07:24:35 +0000303 if (sock_queue_rcv_skb(sk, skb) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 kfree_skb(skb);
305 return NET_RX_DROP;
306 }
307
308 return NET_RX_SUCCESS;
309}
310
311int raw_rcv(struct sock *sk, struct sk_buff *skb)
312{
313 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
Wang Chen33c732c2007-11-13 20:30:01 -0800314 atomic_inc(&sk->sk_drops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 kfree_skb(skb);
316 return NET_RX_DROP;
317 }
Patrick McHardyb59c2702006-01-06 23:06:10 -0800318 nf_reset(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700320 skb_push(skb, skb->data - skb_network_header(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
322 raw_rcv_skb(sk, skb);
323 return 0;
324}
325
David S. Miller77968b72011-05-08 17:12:19 -0700326static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
327 void *from, size_t length,
328 struct rtable **rtp,
329 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
331 struct inet_sock *inet = inet_sk(sk);
Pavel Emelyanov0388b002008-07-14 23:00:43 -0700332 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 struct iphdr *iph;
334 struct sk_buff *skb;
Herbert Xuf844c742008-01-05 23:14:44 -0800335 unsigned int iphlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 int err;
Eric Dumazet1789a642010-06-03 22:23:57 +0000337 struct rtable *rt = *rtp;
Herbert Xu66088242011-11-18 02:20:04 +0000338 int hlen, tlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Changli Gaod8d1f302010-06-10 23:31:35 -0700340 if (length > rt->dst.dev->mtu) {
David S. Miller77968b72011-05-08 17:12:19 -0700341 ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
Changli Gaod8d1f302010-06-10 23:31:35 -0700342 rt->dst.dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 return -EMSGSIZE;
344 }
345 if (flags&MSG_PROBE)
346 goto out;
347
Herbert Xu66088242011-11-18 02:20:04 +0000348 hlen = LL_RESERVED_SPACE(rt->dst.dev);
349 tlen = rt->dst.dev->needed_tailroom;
Johannes Bergf5184d22008-05-12 20:48:31 -0700350 skb = sock_alloc_send_skb(sk,
Herbert Xu66088242011-11-18 02:20:04 +0000351 length + hlen + tlen + 15,
Johannes Bergf5184d22008-05-12 20:48:31 -0700352 flags & MSG_DONTWAIT, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 if (skb == NULL)
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900354 goto error;
Herbert Xu66088242011-11-18 02:20:04 +0000355 skb_reserve(skb, hlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
357 skb->priority = sk->sk_priority;
Laszlo Attila Toth4a19ec52008-01-30 19:08:16 -0800358 skb->mark = sk->sk_mark;
Changli Gaod8d1f302010-06-10 23:31:35 -0700359 skb_dst_set(skb, &rt->dst);
Eric Dumazet1789a642010-06-03 22:23:57 +0000360 *rtp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Arnaldo Carvalho de Melo7e28ecc2007-03-10 18:40:59 -0300362 skb_reset_network_header(skb);
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700363 iph = ip_hdr(skb);
Arnaldo Carvalho de Melo7e28ecc2007-03-10 18:40:59 -0300364 skb_put(skb, length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
366 skb->ip_summed = CHECKSUM_NONE;
367
Arnaldo Carvalho de Melob0e380b2007-04-10 21:21:55 -0700368 skb->transport_header = skb->network_header;
Neil Horman55888df2009-10-28 08:59:47 +0000369 err = -EFAULT;
370 if (memcpy_fromiovecend((void *)iph, from, 0, length))
371 goto error_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
Herbert Xuf844c742008-01-05 23:14:44 -0800373 iphlen = iph->ihl * 4;
Neil Horman55888df2009-10-28 08:59:47 +0000374
375 /*
376 * We don't want to modify the ip header, but we do need to
377 * be sure that it won't cause problems later along the network
378 * stack. Specifically we want to make sure that iph->ihl is a
379 * sane value. If ihl points beyond the length of the buffer passed
380 * in, reject the frame as invalid
381 */
382 err = -EINVAL;
383 if (iphlen > length)
384 goto error_free;
385
386 if (iphlen >= sizeof(*iph)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 if (!iph->saddr)
David S. Miller77968b72011-05-08 17:12:19 -0700388 iph->saddr = fl4->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 iph->check = 0;
390 iph->tot_len = htons(length);
391 if (!iph->id)
Ansis Atteka703133d2013-09-18 15:29:53 -0700392 ip_select_ident(skb, &rt->dst, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
394 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
395 }
David L Stevens96793b42007-09-17 09:57:33 -0700396 if (iph->protocol == IPPROTO_ICMP)
Pavel Emelyanov0388b002008-07-14 23:00:43 -0700397 icmp_out_count(net, ((struct icmphdr *)
David L Stevens96793b42007-09-17 09:57:33 -0700398 skb_transport_header(skb))->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
Jan Engelhardt9bbc7682010-03-23 04:07:29 +0100400 err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL,
Changli Gaod8d1f302010-06-10 23:31:35 -0700401 rt->dst.dev, dst_output);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 if (err > 0)
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700403 err = net_xmit_errno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 if (err)
405 goto error;
406out:
407 return 0;
408
Neil Horman55888df2009-10-28 08:59:47 +0000409error_free:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 kfree_skb(skb);
411error:
Pavel Emelyanov5e38e272008-07-16 20:19:49 -0700412 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700413 if (err == -ENOBUFS && !inet->recverr)
414 err = 0;
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900415 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416}
417
David S. Miller9d6ec932011-03-12 01:12:47 -0500418static int raw_probe_proto_opt(struct flowi4 *fl4, struct msghdr *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419{
420 struct iovec *iov;
421 u8 __user *type = NULL;
422 u8 __user *code = NULL;
423 int probed = 0;
Jesper Juhl93765d82005-06-18 23:00:15 -0700424 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
426 if (!msg->msg_iov)
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800427 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
429 for (i = 0; i < msg->msg_iovlen; i++) {
430 iov = &msg->msg_iov[i];
431 if (!iov)
432 continue;
433
David S. Miller9d6ec932011-03-12 01:12:47 -0500434 switch (fl4->flowi4_proto) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 case IPPROTO_ICMP:
436 /* check if one-byte field is readable or not. */
437 if (iov->iov_base && iov->iov_len < 1)
438 break;
439
440 if (!type) {
441 type = iov->iov_base;
442 /* check if code field is readable or not. */
443 if (iov->iov_len > 1)
444 code = type + 1;
445 } else if (!code)
446 code = iov->iov_base;
447
448 if (type && code) {
David S. Miller9cce96d2011-03-12 03:00:33 -0500449 if (get_user(fl4->fl4_icmp_type, type) ||
450 get_user(fl4->fl4_icmp_code, code))
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800451 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 probed = 1;
453 }
454 break;
455 default:
456 probed = 1;
457 break;
458 }
459 if (probed)
460 break;
461 }
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800462 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463}
464
465static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
466 size_t len)
467{
468 struct inet_sock *inet = inet_sk(sk);
469 struct ipcm_cookie ipc;
470 struct rtable *rt = NULL;
David S. Miller77968b72011-05-08 17:12:19 -0700471 struct flowi4 fl4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 int free = 0;
Al Viro3ca3c682006-09-27 18:28:07 -0700473 __be32 daddr;
Al Viroc1d18f92006-09-27 18:28:28 -0700474 __be32 saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 u8 tos;
476 int err;
Eric Dumazetf6d8bd02011-04-21 09:45:37 +0000477 struct ip_options_data opt_copy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
479 err = -EMSGSIZE;
Jesper Juhl926d4b82005-06-18 23:00:00 -0700480 if (len > 0xFFFF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 goto out;
482
483 /*
484 * Check the flags.
485 */
486
487 err = -EOPNOTSUPP;
488 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
489 goto out; /* compatibility */
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900490
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 /*
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900492 * Get and verify the address.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 */
494
495 if (msg->msg_namelen) {
Jianjun Kong5a5f3a82008-11-03 00:24:34 -0800496 struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 err = -EINVAL;
498 if (msg->msg_namelen < sizeof(*usin))
499 goto out;
500 if (usin->sin_family != AF_INET) {
Joe Perches058bd4d2012-03-11 18:36:11 +0000501 pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n",
502 __func__, current->comm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 err = -EAFNOSUPPORT;
504 if (usin->sin_family)
505 goto out;
506 }
507 daddr = usin->sin_addr.s_addr;
508 /* ANK: I did not forget to get protocol from port field.
509 * I just do not know, who uses this weirdness.
510 * IP_HDRINCL is much more convenient.
511 */
512 } else {
513 err = -EDESTADDRREQ;
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900514 if (sk->sk_state != TCP_ESTABLISHED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 goto out;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000516 daddr = inet->inet_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 }
518
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000519 ipc.addr = inet->inet_saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 ipc.opt = NULL;
Oliver Hartkopp2244d072010-08-17 08:59:14 +0000521 ipc.tx_flags = 0;
Francesco Fuscoaa661582013-09-24 15:43:09 +0200522 ipc.ttl = 0;
523 ipc.tos = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 ipc.oif = sk->sk_bound_dev_if;
525
526 if (msg->msg_controllen) {
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900527 err = ip_cmsg_send(sock_net(sk), msg, &ipc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 if (err)
529 goto out;
530 if (ipc.opt)
531 free = 1;
532 }
533
534 saddr = ipc.addr;
535 ipc.addr = daddr;
536
Eric Dumazetf6d8bd02011-04-21 09:45:37 +0000537 if (!ipc.opt) {
538 struct ip_options_rcu *inet_opt;
539
540 rcu_read_lock();
541 inet_opt = rcu_dereference(inet->inet_opt);
542 if (inet_opt) {
543 memcpy(&opt_copy, inet_opt,
544 sizeof(*inet_opt) + inet_opt->opt.optlen);
545 ipc.opt = &opt_copy.opt;
546 }
547 rcu_read_unlock();
548 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549
550 if (ipc.opt) {
551 err = -EINVAL;
552 /* Linux does not mangle headers on raw sockets,
553 * so that IP options + IP_HDRINCL is non-sense.
554 */
555 if (inet->hdrincl)
556 goto done;
Eric Dumazetf6d8bd02011-04-21 09:45:37 +0000557 if (ipc.opt->opt.srr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 if (!daddr)
559 goto done;
Eric Dumazetf6d8bd02011-04-21 09:45:37 +0000560 daddr = ipc.opt->opt.faddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 }
562 }
Francesco Fuscoaa661582013-09-24 15:43:09 +0200563 tos = get_rtconn_flags(&ipc, sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 if (msg->msg_flags & MSG_DONTROUTE)
565 tos |= RTO_ONLINK;
566
Joe Perchesf97c1e02007-12-16 13:45:43 -0800567 if (ipv4_is_multicast(daddr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 if (!ipc.oif)
569 ipc.oif = inet->mc_index;
570 if (!saddr)
571 saddr = inet->mc_addr;
Erich E. Hoover76e21052012-02-08 09:11:07 +0000572 } else if (!ipc.oif)
573 ipc.oif = inet->uc_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
David S. Miller77968b72011-05-08 17:12:19 -0700575 flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
576 RT_SCOPE_UNIVERSE,
577 inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
Chris Clarkc27c9322013-08-27 12:02:15 -0600578 inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP |
579 (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
Julian Anastasov47670b72011-08-07 09:16:09 +0000580 daddr, saddr, 0, 0);
David S. Milleref164ae2011-03-31 04:53:51 -0700581
David S. Miller77968b72011-05-08 17:12:19 -0700582 if (!inet->hdrincl) {
583 err = raw_probe_proto_opt(&fl4, msg);
584 if (err)
David S. Millerb23dd4f2011-03-02 14:31:35 -0800585 goto done;
David S. Miller77968b72011-05-08 17:12:19 -0700586 }
587
588 security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
589 rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
590 if (IS_ERR(rt)) {
591 err = PTR_ERR(rt);
592 rt = NULL;
593 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595
596 err = -EACCES;
597 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
598 goto done;
599
600 if (msg->msg_flags & MSG_CONFIRM)
601 goto do_confirm;
602back_from_confirm:
603
604 if (inet->hdrincl)
David S. Miller77968b72011-05-08 17:12:19 -0700605 err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len,
606 &rt, msg->msg_flags);
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900607
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 else {
609 if (!ipc.addr)
David S. Miller77968b72011-05-08 17:12:19 -0700610 ipc.addr = fl4.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 lock_sock(sk);
David S. Millerf5fca602011-05-08 17:24:10 -0700612 err = ip_append_data(sk, &fl4, ip_generic_getfrag,
David S. Miller77968b72011-05-08 17:12:19 -0700613 msg->msg_iov, len, 0,
614 &ipc, &rt, msg->msg_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 if (err)
616 ip_flush_pending_frames(sk);
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700617 else if (!(msg->msg_flags & MSG_MORE)) {
David S. Miller77968b72011-05-08 17:12:19 -0700618 err = ip_push_pending_frames(sk, &fl4);
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700619 if (err == -ENOBUFS && !inet->recverr)
620 err = 0;
621 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 release_sock(sk);
623 }
624done:
625 if (free)
626 kfree(ipc.opt);
627 ip_rt_put(rt);
628
Jesper Juhl5418c6922005-06-18 22:59:45 -0700629out:
630 if (err < 0)
631 return err;
632 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
634do_confirm:
Changli Gaod8d1f302010-06-10 23:31:35 -0700635 dst_confirm(&rt->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 if (!(msg->msg_flags & MSG_PROBE) || len)
637 goto back_from_confirm;
638 err = 0;
639 goto done;
640}
641
642static void raw_close(struct sock *sk, long timeout)
643{
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900644 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300645 * Raw sockets may have direct kernel references. Kill them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 */
647 ip_ra_control(sk, 0, NULL);
648
649 sk_common_release(sk);
650}
651
Brian Haley7d06b2e2008-06-14 17:04:49 -0700652static void raw_destroy(struct sock *sk)
Denis V. Lunev22dd4852008-06-04 15:16:12 -0700653{
654 lock_sock(sk);
655 ip_flush_pending_frames(sk);
656 release_sock(sk);
Denis V. Lunev22dd4852008-06-04 15:16:12 -0700657}
658
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659/* This gets rid of all the nasties in af_inet. -DaveM */
660static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
661{
662 struct inet_sock *inet = inet_sk(sk);
663 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
664 int ret = -EINVAL;
665 int chk_addr_ret;
666
667 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
668 goto out;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900669 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 ret = -EADDRNOTAVAIL;
671 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
672 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
673 goto out;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000674 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000676 inet->inet_saddr = 0; /* Use device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 sk_dst_reset(sk);
678 ret = 0;
679out: return ret;
680}
681
682/*
683 * This should be easy, if there is something there
684 * we return it, otherwise we block.
685 */
686
687static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
688 size_t len, int noblock, int flags, int *addr_len)
689{
690 struct inet_sock *inet = inet_sk(sk);
691 size_t copied = 0;
692 int err = -EOPNOTSUPP;
693 struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
694 struct sk_buff *skb;
695
696 if (flags & MSG_OOB)
697 goto out;
698
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 if (flags & MSG_ERRQUEUE) {
Hannes Frederic Sowa85fbaa72013-11-23 00:46:12 +0100700 err = ip_recv_error(sk, msg, len, addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 goto out;
702 }
703
704 skb = skb_recv_datagram(sk, flags, noblock, &err);
705 if (!skb)
706 goto out;
707
708 copied = skb->len;
709 if (len < copied) {
710 msg->msg_flags |= MSG_TRUNC;
711 copied = len;
712 }
713
714 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
715 if (err)
716 goto done;
717
Neil Horman3b885782009-10-12 13:26:31 -0700718 sock_recv_ts_and_drops(msg, sk, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
720 /* Copy the address. */
721 if (sin) {
722 sin->sin_family = AF_INET;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700723 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
Tetsuo Handaf59fc7f2006-07-25 17:05:35 -0700724 sin->sin_port = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
Hannes Frederic Sowabceaa902013-11-18 04:20:45 +0100726 *addr_len = sizeof(*sin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 }
728 if (inet->cmsg_flags)
729 ip_cmsg_recv(msg, skb);
730 if (flags & MSG_TRUNC)
731 copied = skb->len;
732done:
733 skb_free_datagram(sk, skb);
Jesper Juhl5418c6922005-06-18 22:59:45 -0700734out:
735 if (err)
736 return err;
737 return copied;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738}
739
740static int raw_init(struct sock *sk)
741{
742 struct raw_sock *rp = raw_sk(sk);
743
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000744 if (inet_sk(sk)->inet_num == IPPROTO_ICMP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 memset(&rp->filter, 0, sizeof(rp->filter));
746 return 0;
747}
748
749static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
750{
751 if (optlen > sizeof(struct icmp_filter))
752 optlen = sizeof(struct icmp_filter);
753 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
754 return -EFAULT;
755 return 0;
756}
757
758static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
759{
760 int len, ret = -EFAULT;
761
762 if (get_user(len, optlen))
763 goto out;
764 ret = -EINVAL;
765 if (len < 0)
766 goto out;
767 if (len > sizeof(struct icmp_filter))
768 len = sizeof(struct icmp_filter);
769 ret = -EFAULT;
770 if (put_user(len, optlen) ||
771 copy_to_user(optval, &raw_sk(sk)->filter, len))
772 goto out;
773 ret = 0;
774out: return ret;
775}
776
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800777static int do_raw_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700778 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 if (optname == ICMP_FILTER) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000781 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 return -EOPNOTSUPP;
783 else
784 return raw_seticmpfilter(sk, optval, optlen);
785 }
786 return -ENOPROTOOPT;
787}
788
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800789static int raw_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700790 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791{
792 if (level != SOL_RAW)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800793 return ip_setsockopt(sk, level, optname, optval, optlen);
794 return do_raw_setsockopt(sk, level, optname, optval, optlen);
795}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800797#ifdef CONFIG_COMPAT
798static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700799 char __user *optval, unsigned int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800800{
801 if (level != SOL_RAW)
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800802 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800803 return do_raw_setsockopt(sk, level, optname, optval, optlen);
804}
805#endif
806
807static int do_raw_getsockopt(struct sock *sk, int level, int optname,
808 char __user *optval, int __user *optlen)
809{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 if (optname == ICMP_FILTER) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000811 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 return -EOPNOTSUPP;
813 else
814 return raw_geticmpfilter(sk, optval, optlen);
815 }
816 return -ENOPROTOOPT;
817}
818
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800819static int raw_getsockopt(struct sock *sk, int level, int optname,
820 char __user *optval, int __user *optlen)
821{
822 if (level != SOL_RAW)
823 return ip_getsockopt(sk, level, optname, optval, optlen);
824 return do_raw_getsockopt(sk, level, optname, optval, optlen);
825}
826
827#ifdef CONFIG_COMPAT
828static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800829 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800830{
831 if (level != SOL_RAW)
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800832 return compat_ip_getsockopt(sk, level, optname, optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800833 return do_raw_getsockopt(sk, level, optname, optval, optlen);
834}
835#endif
836
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
838{
839 switch (cmd) {
Joe Perches4500ebf2011-07-01 09:43:07 +0000840 case SIOCOUTQ: {
841 int amount = sk_wmem_alloc_get(sk);
Eric Dumazet31e6d362009-06-17 19:05:41 -0700842
Joe Perches4500ebf2011-07-01 09:43:07 +0000843 return put_user(amount, (int __user *)arg);
844 }
845 case SIOCINQ: {
846 struct sk_buff *skb;
847 int amount = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848
Joe Perches4500ebf2011-07-01 09:43:07 +0000849 spin_lock_bh(&sk->sk_receive_queue.lock);
850 skb = skb_peek(&sk->sk_receive_queue);
851 if (skb != NULL)
852 amount = skb->len;
853 spin_unlock_bh(&sk->sk_receive_queue.lock);
854 return put_user(amount, (int __user *)arg);
855 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
Joe Perches4500ebf2011-07-01 09:43:07 +0000857 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858#ifdef CONFIG_IP_MROUTE
Joe Perches4500ebf2011-07-01 09:43:07 +0000859 return ipmr_ioctl(sk, cmd, (void __user *)arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860#else
Joe Perches4500ebf2011-07-01 09:43:07 +0000861 return -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862#endif
863 }
864}
865
Eric W. Biederman709b46e2011-01-29 16:15:56 +0000866#ifdef CONFIG_COMPAT
867static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
868{
869 switch (cmd) {
870 case SIOCOUTQ:
871 case SIOCINQ:
872 return -ENOIOCTLCMD;
873 default:
874#ifdef CONFIG_IP_MROUTE
875 return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
876#else
877 return -ENOIOCTLCMD;
878#endif
879 }
880}
881#endif
882
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883struct proto raw_prot = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800884 .name = "RAW",
885 .owner = THIS_MODULE,
886 .close = raw_close,
Denis V. Lunev22dd4852008-06-04 15:16:12 -0700887 .destroy = raw_destroy,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800888 .connect = ip4_datagram_connect,
889 .disconnect = udp_disconnect,
890 .ioctl = raw_ioctl,
891 .init = raw_init,
892 .setsockopt = raw_setsockopt,
893 .getsockopt = raw_getsockopt,
894 .sendmsg = raw_sendmsg,
895 .recvmsg = raw_recvmsg,
896 .bind = raw_bind,
897 .backlog_rcv = raw_rcv_skb,
Steffen Klassert8141ed92013-01-21 02:00:03 +0000898 .release_cb = ip4_datagram_release_cb,
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -0700899 .hash = raw_hash_sk,
900 .unhash = raw_unhash_sk,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800901 .obj_size = sizeof(struct raw_sock),
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -0700902 .h.raw_hash = &raw_v4_hashinfo,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800903#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800904 .compat_setsockopt = compat_raw_setsockopt,
905 .compat_getsockopt = compat_raw_getsockopt,
Eric W. Biederman709b46e2011-01-29 16:15:56 +0000906 .compat_ioctl = compat_raw_ioctl,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800907#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908};
909
910#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911static struct sock *raw_get_first(struct seq_file *seq)
912{
913 struct sock *sk;
Jianjun Kong5a5f3a82008-11-03 00:24:34 -0800914 struct raw_iter_state *state = raw_seq_private(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800916 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
917 ++state->bucket) {
Sasha Levinb67bfe02013-02-27 17:06:00 -0800918 sk_for_each(sk, &state->h->ht[state->bucket])
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +0900919 if (sock_net(sk) == seq_file_net(seq))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 goto found;
921 }
922 sk = NULL;
923found:
924 return sk;
925}
926
927static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
928{
Jianjun Kong5a5f3a82008-11-03 00:24:34 -0800929 struct raw_iter_state *state = raw_seq_private(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
931 do {
932 sk = sk_next(sk);
933try_again:
934 ;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +0900935 } while (sk && sock_net(sk) != seq_file_net(seq));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800937 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800938 sk = sk_head(&state->h->ht[state->bucket]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 goto try_again;
940 }
941 return sk;
942}
943
944static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
945{
946 struct sock *sk = raw_get_first(seq);
947
948 if (sk)
949 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
950 --pos;
951 return pos ? NULL : sk;
952}
953
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800954void *raw_seq_start(struct seq_file *seq, loff_t *pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955{
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800956 struct raw_iter_state *state = raw_seq_private(seq);
957
958 read_lock(&state->h->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
960}
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800961EXPORT_SYMBOL_GPL(raw_seq_start);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800963void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964{
965 struct sock *sk;
966
967 if (v == SEQ_START_TOKEN)
968 sk = raw_get_first(seq);
969 else
970 sk = raw_get_next(seq, v);
971 ++*pos;
972 return sk;
973}
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800974EXPORT_SYMBOL_GPL(raw_seq_next);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800976void raw_seq_stop(struct seq_file *seq, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977{
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800978 struct raw_iter_state *state = raw_seq_private(seq);
979
980 read_unlock(&state->h->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981}
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800982EXPORT_SYMBOL_GPL(raw_seq_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
Denis V. Lunev8cd850e2008-01-31 03:46:43 -0800984static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985{
986 struct inet_sock *inet = inet_sk(sp);
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000987 __be32 dest = inet->inet_daddr,
988 src = inet->inet_rcv_saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 __u16 destp = 0,
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000990 srcp = inet->inet_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991
Denis V. Lunev8cd850e2008-01-31 03:46:43 -0800992 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
Francesco Fuscod14c5ab2013-08-15 13:42:14 +0200993 " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n",
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900994 i, src, srcp, dest, destp, sp->sk_state,
Eric Dumazet31e6d362009-06-17 19:05:41 -0700995 sk_wmem_alloc_get(sp),
996 sk_rmem_alloc_get(sp),
Eric W. Biedermana7cb5a42012-05-24 01:10:10 -0600997 0, 0L, 0,
998 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
999 0, sock_i_ino(sp),
Wang Chen33c732c2007-11-13 20:30:01 -08001000 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001}
1002
1003static int raw_seq_show(struct seq_file *seq, void *v)
1004{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 if (v == SEQ_START_TOKEN)
Denis V. Lunev8cd850e2008-01-31 03:46:43 -08001006 seq_printf(seq, " sl local_address rem_address st tx_queue "
1007 "rx_queue tr tm->when retrnsmt uid timeout "
Eric Dumazetcb61cb92008-06-17 21:04:56 -07001008 "inode ref pointer drops\n");
Denis V. Lunev8cd850e2008-01-31 03:46:43 -08001009 else
1010 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 return 0;
1012}
1013
Stephen Hemmingerf6908082007-03-12 14:34:29 -07001014static const struct seq_operations raw_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 .start = raw_seq_start,
1016 .next = raw_seq_next,
1017 .stop = raw_seq_stop,
1018 .show = raw_seq_show,
1019};
1020
Denis V. Lunev3046d762008-01-31 03:48:55 -08001021int raw_seq_open(struct inode *ino, struct file *file,
1022 struct raw_hashinfo *h, const struct seq_operations *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023{
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001024 int err;
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001025 struct raw_iter_state *i;
1026
Denis V. Lunev3046d762008-01-31 03:48:55 -08001027 err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state));
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001028 if (err < 0)
1029 return err;
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001030
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001031 i = raw_seq_private((struct seq_file *)file->private_data);
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001032 i->h = h;
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001033 return 0;
1034}
1035EXPORT_SYMBOL_GPL(raw_seq_open);
1036
1037static int raw_v4_seq_open(struct inode *inode, struct file *file)
1038{
Denis V. Lunev3046d762008-01-31 03:48:55 -08001039 return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040}
1041
Arjan van de Ven9a321442007-02-12 00:55:35 -08001042static const struct file_operations raw_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 .owner = THIS_MODULE,
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001044 .open = raw_v4_seq_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 .read = seq_read,
1046 .llseek = seq_lseek,
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001047 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048};
1049
Pavel Emelyanova308da12008-01-14 05:36:50 -08001050static __net_init int raw_init_net(struct net *net)
1051{
Gao fengd4beaa62013-02-18 01:34:54 +00001052 if (!proc_create("raw", S_IRUGO, net->proc_net, &raw_seq_fops))
Pavel Emelyanova308da12008-01-14 05:36:50 -08001053 return -ENOMEM;
1054
1055 return 0;
1056}
1057
1058static __net_exit void raw_exit_net(struct net *net)
1059{
Gao fengece31ff2013-02-18 01:34:56 +00001060 remove_proc_entry("raw", net->proc_net);
Pavel Emelyanova308da12008-01-14 05:36:50 -08001061}
1062
1063static __net_initdata struct pernet_operations raw_net_ops = {
1064 .init = raw_init_net,
1065 .exit = raw_exit_net,
1066};
1067
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068int __init raw_proc_init(void)
1069{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001070 return register_pernet_subsys(&raw_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071}
1072
1073void __init raw_proc_exit(void)
1074{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001075 unregister_pernet_subsys(&raw_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076}
1077#endif /* CONFIG_PROC_FS */