blob: ecbe5a7c2d6d3fb6a55e4c8464eab4853f4fe909 [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/kernel.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040050#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <linux/spinlock.h>
52#include <linux/sockios.h>
53#include <linux/socket.h>
54#include <linux/in.h>
55#include <linux/mroute.h>
56#include <linux/netdevice.h>
57#include <linux/in_route.h>
58#include <linux/route.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <linux/skbuff.h>
Quentin Armitagef5220d62014-07-23 09:58:01 +010060#include <linux/igmp.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>
Herbert Xuc008ba5b2014-11-07 21:27:09 +080081#include <linux/uio.h>
82
83struct raw_frag_vec {
Al Virob61e9dc2014-11-24 10:52:29 -050084 struct msghdr *msg;
Herbert Xuc008ba5b2014-11-07 21:27:09 +080085 union {
86 struct icmphdr icmph;
87 char c[1];
88 } hdr;
89 int hlen;
90};
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080092static struct raw_hashinfo raw_v4_hashinfo = {
Robert P. J. Day938b93a2008-03-18 00:59:23 -070093 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -080094};
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Craig Gallek086c6532016-02-10 11:50:35 -050096int raw_hash_sk(struct sock *sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -070097{
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -070098 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
Pavel Emelyanov65b4c502007-11-19 22:37:24 -080099 struct hlist_head *head;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000101 head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)];
Pavel Emelyanov65b4c502007-11-19 22:37:24 -0800102
103 write_lock_bh(&h->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 sk_add_node(sk, head);
Pavel Emelyanovc29a0bc2008-03-31 19:41:46 -0700105 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
Pavel Emelyanov65b4c502007-11-19 22:37:24 -0800106 write_unlock_bh(&h->lock);
Craig Gallek086c6532016-02-10 11:50:35 -0500107
108 return 0;
Pavel Emelyanov65b4c502007-11-19 22:37:24 -0800109}
110EXPORT_SYMBOL_GPL(raw_hash_sk);
111
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -0700112void raw_unhash_sk(struct sock *sk)
Pavel Emelyanovab707682007-11-19 22:37:58 -0800113{
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -0700114 struct raw_hashinfo *h = sk->sk_prot->h.raw_hash;
115
Pavel Emelyanovab707682007-11-19 22:37:58 -0800116 write_lock_bh(&h->lock);
117 if (sk_del_node_init(sk))
Pavel Emelyanovc29a0bc2008-03-31 19:41:46 -0700118 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
Pavel Emelyanovab707682007-11-19 22:37:58 -0800119 write_unlock_bh(&h->lock);
120}
121EXPORT_SYMBOL_GPL(raw_unhash_sk);
122
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800123static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk,
124 unsigned short num, __be32 raddr, __be32 laddr, int dif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125{
Sasha Levinb67bfe02013-02-27 17:06:00 -0800126 sk_for_each_from(sk) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 struct inet_sock *inet = inet_sk(sk);
128
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000129 if (net_eq(sock_net(sk), net) && inet->inet_num == num &&
130 !(inet->inet_daddr && inet->inet_daddr != raddr) &&
131 !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
133 goto found; /* gotcha */
134 }
135 sk = NULL;
136found:
137 return sk;
138}
139
140/*
141 * 0 - deliver
142 * 1 - block
143 */
Eric Dumazetab43ed82012-09-22 00:08:29 +0000144static int icmp_filter(const struct sock *sk, const struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145{
Eric Dumazetab43ed82012-09-22 00:08:29 +0000146 struct icmphdr _hdr;
147 const struct icmphdr *hdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Eric Dumazetab43ed82012-09-22 00:08:29 +0000149 hdr = skb_header_pointer(skb, skb_transport_offset(skb),
150 sizeof(_hdr), &_hdr);
151 if (!hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 return 1;
153
Eric Dumazetab43ed82012-09-22 00:08:29 +0000154 if (hdr->type < 32) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 __u32 data = raw_sk(sk)->filter.data;
156
Eric Dumazetab43ed82012-09-22 00:08:29 +0000157 return ((1U << hdr->type) & data) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 }
159
160 /* Do not block unknown ICMP types */
161 return 0;
162}
163
164/* IP input processing comes here for RAW socket delivery.
165 * Caller owns SKB, so we must make clones.
166 *
167 * RFC 1122: SHOULD pass TOS value up to the transport layer.
168 * -> It does. And not only TOS, but all IP header.
169 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000170static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171{
172 struct sock *sk;
173 struct hlist_head *head;
Patrick McHardyd13964f2005-08-09 19:45:02 -0700174 int delivered = 0;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800175 struct net *net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800177 read_lock(&raw_v4_hashinfo.lock);
178 head = &raw_v4_hashinfo.ht[hash];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 if (hlist_empty(head))
180 goto out;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800181
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900182 net = dev_net(skb->dev);
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800183 sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 iph->saddr, iph->daddr,
185 skb->dev->ifindex);
186
187 while (sk) {
Patrick McHardyd13964f2005-08-09 19:45:02 -0700188 delivered = 1;
Quentin Armitagef5220d62014-07-23 09:58:01 +0100189 if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) &&
190 ip_mc_sf_allow(sk, iph->daddr, iph->saddr,
191 skb->dev->ifindex)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
193
194 /* Not releasing hash table! */
195 if (clone)
196 raw_rcv(sk, clone);
197 }
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800198 sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 iph->saddr, iph->daddr,
200 skb->dev->ifindex);
201 }
202out:
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800203 read_unlock(&raw_v4_hashinfo.lock);
Patrick McHardyd13964f2005-08-09 19:45:02 -0700204 return delivered;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205}
206
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800207int raw_local_deliver(struct sk_buff *skb, int protocol)
208{
209 int hash;
210 struct sock *raw_sk;
211
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800212 hash = protocol & (RAW_HTABLE_SIZE - 1);
213 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800214
215 /* If there maybe a raw socket we must check - if not we
216 * don't care less
217 */
218 if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash))
219 raw_sk = NULL;
220
221 return raw_sk != NULL;
222
223}
224
225static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226{
227 struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo88c76642007-03-13 14:43:18 -0300228 const int type = icmp_hdr(skb)->type;
229 const int code = icmp_hdr(skb)->code;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 int err = 0;
231 int harderr = 0;
232
David S. Miller36393392012-06-14 22:21:46 -0700233 if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED)
234 ipv4_sk_update_pmtu(skb, sk, info);
Duan Jiong8d65b112013-09-20 18:21:25 +0800235 else if (type == ICMP_REDIRECT) {
David S. Miller55be7a92012-07-11 21:27:49 -0700236 ipv4_sk_redirect(skb, sk);
Duan Jiong8d65b112013-09-20 18:21:25 +0800237 return;
238 }
David S. Miller36393392012-06-14 22:21:46 -0700239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 /* Report error on raw socket, if:
241 1. User requested ip_recverr.
242 2. Socket is connected (otherwise the error indication
243 is useless without ip_recverr and error is hard.
244 */
245 if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED)
246 return;
247
248 switch (type) {
249 default:
250 case ICMP_TIME_EXCEEDED:
251 err = EHOSTUNREACH;
252 break;
253 case ICMP_SOURCE_QUENCH:
254 return;
255 case ICMP_PARAMETERPROB:
256 err = EPROTO;
257 harderr = 1;
258 break;
259 case ICMP_DEST_UNREACH:
260 err = EHOSTUNREACH;
261 if (code > NR_ICMP_UNREACH)
262 break;
263 err = icmp_err_convert[code].errno;
264 harderr = icmp_err_convert[code].fatal;
265 if (code == ICMP_FRAG_NEEDED) {
266 harderr = inet->pmtudisc != IP_PMTUDISC_DONT;
267 err = EMSGSIZE;
268 }
269 }
270
271 if (inet->recverr) {
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000272 const struct iphdr *iph = (const struct iphdr *)skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 u8 *payload = skb->data + (iph->ihl << 2);
274
275 if (inet->hdrincl)
276 payload = skb->data;
277 ip_icmp_error(sk, skb, err, 0, info, payload);
278 }
279
280 if (inet->recverr || harderr) {
281 sk->sk_err = err;
282 sk->sk_error_report(sk);
283 }
284}
285
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800286void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
287{
288 int hash;
289 struct sock *raw_sk;
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000290 const struct iphdr *iph;
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800291 struct net *net;
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800292
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800293 hash = protocol & (RAW_HTABLE_SIZE - 1);
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800294
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800295 read_lock(&raw_v4_hashinfo.lock);
296 raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
Ian Morris00db4122015-04-03 09:17:27 +0100297 if (raw_sk) {
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000298 iph = (const struct iphdr *)skb->data;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900299 net = dev_net(skb->dev);
Pavel Emelyanovbe185882008-01-14 05:35:31 -0800300
301 while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
302 iph->daddr, iph->saddr,
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800303 skb->dev->ifindex)) != NULL) {
304 raw_err(raw_sk, skb, info);
305 raw_sk = sk_next(raw_sk);
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000306 iph = (const struct iphdr *)skb->data;
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800307 }
308 }
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800309 read_unlock(&raw_v4_hashinfo.lock);
Pavel Emelyanov7bc54c92007-11-19 22:35:07 -0800310}
311
Daniel Baluta5e73ea12012-04-15 01:34:41 +0000312static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313{
314 /* Charge it to the socket. */
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900315
Shawn Bohrerfbf88662013-10-07 11:01:40 -0500316 ipv4_pktinfo_prepare(sk, skb);
Eric Dumazetd826eb12011-11-09 07:24:35 +0000317 if (sock_queue_rcv_skb(sk, skb) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 kfree_skb(skb);
319 return NET_RX_DROP;
320 }
321
322 return NET_RX_SUCCESS;
323}
324
325int raw_rcv(struct sock *sk, struct sk_buff *skb)
326{
327 if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
Wang Chen33c732c2007-11-13 20:30:01 -0800328 atomic_inc(&sk->sk_drops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 kfree_skb(skb);
330 return NET_RX_DROP;
331 }
Patrick McHardyb59c2702006-01-06 23:06:10 -0800332 nf_reset(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700334 skb_push(skb, skb->data - skb_network_header(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
336 raw_rcv_skb(sk, skb);
337 return 0;
338}
339
David S. Miller77968b72011-05-08 17:12:19 -0700340static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
Al Viro7ae9abf2014-11-27 19:30:51 -0500341 struct msghdr *msg, size_t length,
Soheil Hassas Yeganehc14ac942016-04-02 23:08:12 -0400342 struct rtable **rtp, unsigned int flags,
343 const struct sockcm_cookie *sockc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
345 struct inet_sock *inet = inet_sk(sk);
Pavel Emelyanov0388b002008-07-14 23:00:43 -0700346 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 struct iphdr *iph;
348 struct sk_buff *skb;
Herbert Xuf844c742008-01-05 23:14:44 -0800349 unsigned int iphlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 int err;
Eric Dumazet1789a642010-06-03 22:23:57 +0000351 struct rtable *rt = *rtp;
Herbert Xu66088242011-11-18 02:20:04 +0000352 int hlen, tlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
Changli Gaod8d1f302010-06-10 23:31:35 -0700354 if (length > rt->dst.dev->mtu) {
David S. Miller77968b72011-05-08 17:12:19 -0700355 ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
Changli Gaod8d1f302010-06-10 23:31:35 -0700356 rt->dst.dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 return -EMSGSIZE;
358 }
359 if (flags&MSG_PROBE)
360 goto out;
361
Herbert Xu66088242011-11-18 02:20:04 +0000362 hlen = LL_RESERVED_SPACE(rt->dst.dev);
363 tlen = rt->dst.dev->needed_tailroom;
Johannes Bergf5184d22008-05-12 20:48:31 -0700364 skb = sock_alloc_send_skb(sk,
Herbert Xu66088242011-11-18 02:20:04 +0000365 length + hlen + tlen + 15,
Johannes Bergf5184d22008-05-12 20:48:31 -0700366 flags & MSG_DONTWAIT, &err);
Ian Morris51456b22015-04-03 09:17:26 +0100367 if (!skb)
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900368 goto error;
Herbert Xu66088242011-11-18 02:20:04 +0000369 skb_reserve(skb, hlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
371 skb->priority = sk->sk_priority;
Laszlo Attila Toth4a19ec52008-01-30 19:08:16 -0800372 skb->mark = sk->sk_mark;
Changli Gaod8d1f302010-06-10 23:31:35 -0700373 skb_dst_set(skb, &rt->dst);
Eric Dumazet1789a642010-06-03 22:23:57 +0000374 *rtp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Arnaldo Carvalho de Melo7e28ecc2007-03-10 18:40:59 -0300376 skb_reset_network_header(skb);
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700377 iph = ip_hdr(skb);
Arnaldo Carvalho de Melo7e28ecc2007-03-10 18:40:59 -0300378 skb_put(skb, length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
380 skb->ip_summed = CHECKSUM_NONE;
381
Soheil Hassas Yeganehc14ac942016-04-02 23:08:12 -0400382 sock_tx_timestamp(sk, sockc->tsflags, &skb_shinfo(skb)->tx_flags);
Willem de Bruijn11878b42014-07-14 17:55:06 -0400383
Arnaldo Carvalho de Melob0e380b2007-04-10 21:21:55 -0700384 skb->transport_header = skb->network_header;
Neil Horman55888df2009-10-28 08:59:47 +0000385 err = -EFAULT;
Al Viro21226ab2014-11-28 15:48:29 -0500386 if (memcpy_from_msg(iph, msg, length))
Neil Horman55888df2009-10-28 08:59:47 +0000387 goto error_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Herbert Xuf844c742008-01-05 23:14:44 -0800389 iphlen = iph->ihl * 4;
Neil Horman55888df2009-10-28 08:59:47 +0000390
391 /*
392 * We don't want to modify the ip header, but we do need to
393 * be sure that it won't cause problems later along the network
394 * stack. Specifically we want to make sure that iph->ihl is a
395 * sane value. If ihl points beyond the length of the buffer passed
396 * in, reject the frame as invalid
397 */
398 err = -EINVAL;
399 if (iphlen > length)
400 goto error_free;
401
402 if (iphlen >= sizeof(*iph)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 if (!iph->saddr)
David S. Miller77968b72011-05-08 17:12:19 -0700404 iph->saddr = fl4->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 iph->check = 0;
406 iph->tot_len = htons(length);
407 if (!iph->id)
Hannes Frederic Sowab6a77192015-03-25 17:07:44 +0100408 ip_select_ident(net, skb, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
Ben Cartwright-Cox027ac582015-11-14 15:13:58 +0000411 skb->transport_header += iphlen;
412 if (iph->protocol == IPPROTO_ICMP &&
413 length >= iphlen + sizeof(struct icmphdr))
414 icmp_out_count(net, ((struct icmphdr *)
415 skb_transport_header(skb))->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 }
417
Eric W. Biederman29a26a52015-09-15 20:04:16 -0500418 err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT,
419 net, sk, skb, NULL, rt->dst.dev,
Eric W. Biederman13206b62015-10-07 16:48:35 -0500420 dst_output);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 if (err > 0)
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700422 err = net_xmit_errno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 if (err)
424 goto error;
425out:
426 return 0;
427
Neil Horman55888df2009-10-28 08:59:47 +0000428error_free:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 kfree_skb(skb);
430error:
Pavel Emelyanov5e38e272008-07-16 20:19:49 -0700431 IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS);
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700432 if (err == -ENOBUFS && !inet->recverr)
433 err = 0;
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900434 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435}
436
Herbert Xuc008ba5b2014-11-07 21:27:09 +0800437static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438{
Herbert Xu32b59132014-11-07 21:27:08 +0800439 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
Herbert Xu32b59132014-11-07 21:27:08 +0800441 if (fl4->flowi4_proto != IPPROTO_ICMP)
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800442 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Herbert Xu32b59132014-11-07 21:27:08 +0800444 /* We only need the first two bytes. */
Herbert Xuc008ba5b2014-11-07 21:27:09 +0800445 rfv->hlen = 2;
446
Al Virob61e9dc2014-11-24 10:52:29 -0500447 err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen);
Herbert Xu32b59132014-11-07 21:27:08 +0800448 if (err)
449 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450
Herbert Xuc008ba5b2014-11-07 21:27:09 +0800451 fl4->fl4_icmp_type = rfv->hdr.icmph.type;
452 fl4->fl4_icmp_code = rfv->hdr.icmph.code;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
Heiko Carstensa27b58f2006-10-30 15:06:12 -0800454 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455}
456
Herbert Xuc008ba5b2014-11-07 21:27:09 +0800457static int raw_getfrag(void *from, char *to, int offset, int len, int odd,
458 struct sk_buff *skb)
459{
460 struct raw_frag_vec *rfv = from;
461
462 if (offset < rfv->hlen) {
463 int copy = min(rfv->hlen - offset, len);
464
465 if (skb->ip_summed == CHECKSUM_PARTIAL)
466 memcpy(to, rfv->hdr.c + offset, copy);
467 else
468 skb->csum = csum_block_add(
469 skb->csum,
470 csum_partial_copy_nocheck(rfv->hdr.c + offset,
471 to, copy, 0),
472 odd);
473
474 odd = 0;
475 offset += copy;
476 to += copy;
477 len -= copy;
478
479 if (!len)
480 return 0;
481 }
482
483 offset -= rfv->hlen;
484
Al Virof69e6d12014-11-24 13:23:40 -0500485 return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
Herbert Xuc008ba5b2014-11-07 21:27:09 +0800486}
487
Ying Xue1b784142015-03-02 15:37:48 +0800488static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489{
490 struct inet_sock *inet = inet_sk(sk);
David Ahernbb191c32015-10-05 08:51:27 -0700491 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 struct ipcm_cookie ipc;
493 struct rtable *rt = NULL;
David S. Miller77968b72011-05-08 17:12:19 -0700494 struct flowi4 fl4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 int free = 0;
Al Viro3ca3c682006-09-27 18:28:07 -0700496 __be32 daddr;
Al Viroc1d18f92006-09-27 18:28:28 -0700497 __be32 saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 u8 tos;
499 int err;
Eric Dumazetf6d8bd02011-04-21 09:45:37 +0000500 struct ip_options_data opt_copy;
Herbert Xuc008ba5b2014-11-07 21:27:09 +0800501 struct raw_frag_vec rfv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
503 err = -EMSGSIZE;
Jesper Juhl926d4b82005-06-18 23:00:00 -0700504 if (len > 0xFFFF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 goto out;
506
507 /*
508 * Check the flags.
509 */
510
511 err = -EOPNOTSUPP;
512 if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */
513 goto out; /* compatibility */
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 /*
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900516 * Get and verify the address.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 */
518
519 if (msg->msg_namelen) {
Steffen Hurrle342dfc32014-01-17 22:53:15 +0100520 DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 err = -EINVAL;
522 if (msg->msg_namelen < sizeof(*usin))
523 goto out;
524 if (usin->sin_family != AF_INET) {
Joe Perches058bd4d2012-03-11 18:36:11 +0000525 pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n",
526 __func__, current->comm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 err = -EAFNOSUPPORT;
528 if (usin->sin_family)
529 goto out;
530 }
531 daddr = usin->sin_addr.s_addr;
532 /* ANK: I did not forget to get protocol from port field.
533 * I just do not know, who uses this weirdness.
534 * IP_HDRINCL is much more convenient.
535 */
536 } else {
537 err = -EDESTADDRREQ;
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900538 if (sk->sk_state != TCP_ESTABLISHED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 goto out;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000540 daddr = inet->inet_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 }
542
Soheil Hassas Yeganehc14ac942016-04-02 23:08:12 -0400543 ipc.sockc.tsflags = sk->sk_tsflags;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000544 ipc.addr = inet->inet_saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 ipc.opt = NULL;
Oliver Hartkopp2244d072010-08-17 08:59:14 +0000546 ipc.tx_flags = 0;
Francesco Fuscoaa661582013-09-24 15:43:09 +0200547 ipc.ttl = 0;
548 ipc.tos = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 ipc.oif = sk->sk_bound_dev_if;
550
551 if (msg->msg_controllen) {
Soheil Hassas Yeganeh24025c42016-04-02 23:08:10 -0400552 err = ip_cmsg_send(sk, msg, &ipc, false);
Eric Dumazet91948302016-02-04 06:23:28 -0800553 if (unlikely(err)) {
554 kfree(ipc.opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 goto out;
Eric Dumazet91948302016-02-04 06:23:28 -0800556 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 if (ipc.opt)
558 free = 1;
559 }
560
561 saddr = ipc.addr;
562 ipc.addr = daddr;
563
Eric Dumazetf6d8bd02011-04-21 09:45:37 +0000564 if (!ipc.opt) {
565 struct ip_options_rcu *inet_opt;
566
567 rcu_read_lock();
568 inet_opt = rcu_dereference(inet->inet_opt);
569 if (inet_opt) {
570 memcpy(&opt_copy, inet_opt,
571 sizeof(*inet_opt) + inet_opt->opt.optlen);
572 ipc.opt = &opt_copy.opt;
573 }
574 rcu_read_unlock();
575 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576
577 if (ipc.opt) {
578 err = -EINVAL;
579 /* Linux does not mangle headers on raw sockets,
580 * so that IP options + IP_HDRINCL is non-sense.
581 */
582 if (inet->hdrincl)
583 goto done;
Eric Dumazetf6d8bd02011-04-21 09:45:37 +0000584 if (ipc.opt->opt.srr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 if (!daddr)
586 goto done;
Eric Dumazetf6d8bd02011-04-21 09:45:37 +0000587 daddr = ipc.opt->opt.faddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
589 }
Francesco Fuscoaa661582013-09-24 15:43:09 +0200590 tos = get_rtconn_flags(&ipc, sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 if (msg->msg_flags & MSG_DONTROUTE)
592 tos |= RTO_ONLINK;
593
Joe Perchesf97c1e02007-12-16 13:45:43 -0800594 if (ipv4_is_multicast(daddr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 if (!ipc.oif)
596 ipc.oif = inet->mc_index;
597 if (!saddr)
598 saddr = inet->mc_addr;
Erich E. Hoover76e21052012-02-08 09:11:07 +0000599 } else if (!ipc.oif)
600 ipc.oif = inet->uc_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
David S. Miller77968b72011-05-08 17:12:19 -0700602 flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
603 RT_SCOPE_UNIVERSE,
604 inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
Steffen Klassert0e0d44a2013-08-28 08:04:14 +0200605 inet_sk_flowi_flags(sk) |
Chris Clarkc27c9322013-08-27 12:02:15 -0600606 (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
Julian Anastasov47670b72011-08-07 09:16:09 +0000607 daddr, saddr, 0, 0);
David S. Milleref164ae2011-03-31 04:53:51 -0700608
David S. Miller77968b72011-05-08 17:12:19 -0700609 if (!inet->hdrincl) {
Al Virob61e9dc2014-11-24 10:52:29 -0500610 rfv.msg = msg;
Herbert Xuc008ba5b2014-11-07 21:27:09 +0800611 rfv.hlen = 0;
612
613 err = raw_probe_proto_opt(&rfv, &fl4);
David S. Miller77968b72011-05-08 17:12:19 -0700614 if (err)
David S. Millerb23dd4f2011-03-02 14:31:35 -0800615 goto done;
David S. Miller77968b72011-05-08 17:12:19 -0700616 }
617
618 security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
David Ahernbb191c32015-10-05 08:51:27 -0700619 rt = ip_route_output_flow(net, &fl4, sk);
David S. Miller77968b72011-05-08 17:12:19 -0700620 if (IS_ERR(rt)) {
621 err = PTR_ERR(rt);
622 rt = NULL;
623 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
626 err = -EACCES;
627 if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST))
628 goto done;
629
630 if (msg->msg_flags & MSG_CONFIRM)
631 goto do_confirm;
632back_from_confirm:
633
634 if (inet->hdrincl)
Al Viro7ae9abf2014-11-27 19:30:51 -0500635 err = raw_send_hdrinc(sk, &fl4, msg, len,
Soheil Hassas Yeganehc14ac942016-04-02 23:08:12 -0400636 &rt, msg->msg_flags, &ipc.sockc);
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900637
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 else {
Soheil Hassas Yeganehc14ac942016-04-02 23:08:12 -0400639 sock_tx_timestamp(sk, ipc.sockc.tsflags, &ipc.tx_flags);
Willem de Bruijn11878b42014-07-14 17:55:06 -0400640
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 if (!ipc.addr)
David S. Miller77968b72011-05-08 17:12:19 -0700642 ipc.addr = fl4.daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 lock_sock(sk);
Herbert Xuc008ba5b2014-11-07 21:27:09 +0800644 err = ip_append_data(sk, &fl4, raw_getfrag,
645 &rfv, len, 0,
David S. Miller77968b72011-05-08 17:12:19 -0700646 &ipc, &rt, msg->msg_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 if (err)
648 ip_flush_pending_frames(sk);
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700649 else if (!(msg->msg_flags & MSG_MORE)) {
David S. Miller77968b72011-05-08 17:12:19 -0700650 err = ip_push_pending_frames(sk, &fl4);
Eric Dumazet6ce9e7b2009-09-02 18:05:33 -0700651 if (err == -ENOBUFS && !inet->recverr)
652 err = 0;
653 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 release_sock(sk);
655 }
656done:
657 if (free)
658 kfree(ipc.opt);
659 ip_rt_put(rt);
660
Jesper Juhl5418c6922005-06-18 22:59:45 -0700661out:
662 if (err < 0)
663 return err;
664 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
666do_confirm:
Changli Gaod8d1f302010-06-10 23:31:35 -0700667 dst_confirm(&rt->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 if (!(msg->msg_flags & MSG_PROBE) || len)
669 goto back_from_confirm;
670 err = 0;
671 goto done;
672}
673
674static void raw_close(struct sock *sk, long timeout)
675{
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900676 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300677 * Raw sockets may have direct kernel references. Kill them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 */
679 ip_ra_control(sk, 0, NULL);
680
681 sk_common_release(sk);
682}
683
Brian Haley7d06b2e2008-06-14 17:04:49 -0700684static void raw_destroy(struct sock *sk)
Denis V. Lunev22dd4852008-06-04 15:16:12 -0700685{
686 lock_sock(sk);
687 ip_flush_pending_frames(sk);
688 release_sock(sk);
Denis V. Lunev22dd4852008-06-04 15:16:12 -0700689}
690
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691/* This gets rid of all the nasties in af_inet. -DaveM */
692static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
693{
694 struct inet_sock *inet = inet_sk(sk);
695 struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
696 int ret = -EINVAL;
697 int chk_addr_ret;
698
699 if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
700 goto out;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900701 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 ret = -EADDRNOTAVAIL;
703 if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
704 chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
705 goto out;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000706 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000708 inet->inet_saddr = 0; /* Use device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 sk_dst_reset(sk);
710 ret = 0;
711out: return ret;
712}
713
714/*
715 * This should be easy, if there is something there
716 * we return it, otherwise we block.
717 */
718
Ying Xue1b784142015-03-02 15:37:48 +0800719static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
720 int noblock, int flags, int *addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721{
722 struct inet_sock *inet = inet_sk(sk);
723 size_t copied = 0;
724 int err = -EOPNOTSUPP;
Steffen Hurrle342dfc32014-01-17 22:53:15 +0100725 DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 struct sk_buff *skb;
727
728 if (flags & MSG_OOB)
729 goto out;
730
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 if (flags & MSG_ERRQUEUE) {
Hannes Frederic Sowa85fbaa72013-11-23 00:46:12 +0100732 err = ip_recv_error(sk, msg, len, addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 goto out;
734 }
735
736 skb = skb_recv_datagram(sk, flags, noblock, &err);
737 if (!skb)
738 goto out;
739
740 copied = skb->len;
741 if (len < copied) {
742 msg->msg_flags |= MSG_TRUNC;
743 copied = len;
744 }
745
David S. Miller51f3d022014-11-05 16:46:40 -0500746 err = skb_copy_datagram_msg(skb, 0, msg, copied);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 if (err)
748 goto done;
749
Neil Horman3b885782009-10-12 13:26:31 -0700750 sock_recv_ts_and_drops(msg, sk, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
752 /* Copy the address. */
753 if (sin) {
754 sin->sin_family = AF_INET;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700755 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
Tetsuo Handaf59fc7f2006-07-25 17:05:35 -0700756 sin->sin_port = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
Hannes Frederic Sowabceaa902013-11-18 04:20:45 +0100758 *addr_len = sizeof(*sin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 }
760 if (inet->cmsg_flags)
761 ip_cmsg_recv(msg, skb);
762 if (flags & MSG_TRUNC)
763 copied = skb->len;
764done:
765 skb_free_datagram(sk, skb);
Jesper Juhl5418c6922005-06-18 22:59:45 -0700766out:
767 if (err)
768 return err;
769 return copied;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770}
771
772static int raw_init(struct sock *sk)
773{
774 struct raw_sock *rp = raw_sk(sk);
775
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000776 if (inet_sk(sk)->inet_num == IPPROTO_ICMP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 memset(&rp->filter, 0, sizeof(rp->filter));
778 return 0;
779}
780
781static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen)
782{
783 if (optlen > sizeof(struct icmp_filter))
784 optlen = sizeof(struct icmp_filter);
785 if (copy_from_user(&raw_sk(sk)->filter, optval, optlen))
786 return -EFAULT;
787 return 0;
788}
789
790static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen)
791{
792 int len, ret = -EFAULT;
793
794 if (get_user(len, optlen))
795 goto out;
796 ret = -EINVAL;
797 if (len < 0)
798 goto out;
799 if (len > sizeof(struct icmp_filter))
800 len = sizeof(struct icmp_filter);
801 ret = -EFAULT;
802 if (put_user(len, optlen) ||
803 copy_to_user(optval, &raw_sk(sk)->filter, len))
804 goto out;
805 ret = 0;
806out: return ret;
807}
808
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800809static int do_raw_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700810 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 if (optname == ICMP_FILTER) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000813 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 return -EOPNOTSUPP;
815 else
816 return raw_seticmpfilter(sk, optval, optlen);
817 }
818 return -ENOPROTOOPT;
819}
820
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800821static int raw_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700822 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823{
824 if (level != SOL_RAW)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800825 return ip_setsockopt(sk, level, optname, optval, optlen);
826 return do_raw_setsockopt(sk, level, optname, optval, optlen);
827}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800829#ifdef CONFIG_COMPAT
830static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700831 char __user *optval, unsigned int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800832{
833 if (level != SOL_RAW)
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800834 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800835 return do_raw_setsockopt(sk, level, optname, optval, optlen);
836}
837#endif
838
839static int do_raw_getsockopt(struct sock *sk, int level, int optname,
840 char __user *optval, int __user *optlen)
841{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 if (optname == ICMP_FILTER) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000843 if (inet_sk(sk)->inet_num != IPPROTO_ICMP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 return -EOPNOTSUPP;
845 else
846 return raw_geticmpfilter(sk, optval, optlen);
847 }
848 return -ENOPROTOOPT;
849}
850
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800851static int raw_getsockopt(struct sock *sk, int level, int optname,
852 char __user *optval, int __user *optlen)
853{
854 if (level != SOL_RAW)
855 return ip_getsockopt(sk, level, optname, optval, optlen);
856 return do_raw_getsockopt(sk, level, optname, optval, optlen);
857}
858
859#ifdef CONFIG_COMPAT
860static int compat_raw_getsockopt(struct sock *sk, int level, int optname,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800861 char __user *optval, int __user *optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800862{
863 if (level != SOL_RAW)
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800864 return compat_ip_getsockopt(sk, level, optname, optval, optlen);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800865 return do_raw_getsockopt(sk, level, optname, optval, optlen);
866}
867#endif
868
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
870{
871 switch (cmd) {
Joe Perches4500ebf2011-07-01 09:43:07 +0000872 case SIOCOUTQ: {
873 int amount = sk_wmem_alloc_get(sk);
Eric Dumazet31e6d362009-06-17 19:05:41 -0700874
Joe Perches4500ebf2011-07-01 09:43:07 +0000875 return put_user(amount, (int __user *)arg);
876 }
877 case SIOCINQ: {
878 struct sk_buff *skb;
879 int amount = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
Joe Perches4500ebf2011-07-01 09:43:07 +0000881 spin_lock_bh(&sk->sk_receive_queue.lock);
882 skb = skb_peek(&sk->sk_receive_queue);
Ian Morris00db4122015-04-03 09:17:27 +0100883 if (skb)
Joe Perches4500ebf2011-07-01 09:43:07 +0000884 amount = skb->len;
885 spin_unlock_bh(&sk->sk_receive_queue.lock);
886 return put_user(amount, (int __user *)arg);
887 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888
Joe Perches4500ebf2011-07-01 09:43:07 +0000889 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890#ifdef CONFIG_IP_MROUTE
Joe Perches4500ebf2011-07-01 09:43:07 +0000891 return ipmr_ioctl(sk, cmd, (void __user *)arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892#else
Joe Perches4500ebf2011-07-01 09:43:07 +0000893 return -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894#endif
895 }
896}
897
Eric W. Biederman709b46e2011-01-29 16:15:56 +0000898#ifdef CONFIG_COMPAT
899static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
900{
901 switch (cmd) {
902 case SIOCOUTQ:
903 case SIOCINQ:
904 return -ENOIOCTLCMD;
905 default:
906#ifdef CONFIG_IP_MROUTE
907 return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
908#else
909 return -ENOIOCTLCMD;
910#endif
911 }
912}
913#endif
914
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915struct proto raw_prot = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800916 .name = "RAW",
917 .owner = THIS_MODULE,
918 .close = raw_close,
Denis V. Lunev22dd4852008-06-04 15:16:12 -0700919 .destroy = raw_destroy,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800920 .connect = ip4_datagram_connect,
Eric Dumazet286c72d2016-10-20 09:39:40 -0700921 .disconnect = __udp_disconnect,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800922 .ioctl = raw_ioctl,
923 .init = raw_init,
924 .setsockopt = raw_setsockopt,
925 .getsockopt = raw_getsockopt,
926 .sendmsg = raw_sendmsg,
927 .recvmsg = raw_recvmsg,
928 .bind = raw_bind,
929 .backlog_rcv = raw_rcv_skb,
Steffen Klassert8141ed92013-01-21 02:00:03 +0000930 .release_cb = ip4_datagram_release_cb,
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -0700931 .hash = raw_hash_sk,
932 .unhash = raw_unhash_sk,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800933 .obj_size = sizeof(struct raw_sock),
Pavel Emelyanovfc8717b2008-03-22 16:56:51 -0700934 .h.raw_hash = &raw_v4_hashinfo,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800935#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800936 .compat_setsockopt = compat_raw_setsockopt,
937 .compat_getsockopt = compat_raw_getsockopt,
Eric W. Biederman709b46e2011-01-29 16:15:56 +0000938 .compat_ioctl = compat_raw_ioctl,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800939#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940};
941
942#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943static struct sock *raw_get_first(struct seq_file *seq)
944{
945 struct sock *sk;
Jianjun Kong5a5f3a82008-11-03 00:24:34 -0800946 struct raw_iter_state *state = raw_seq_private(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800948 for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
949 ++state->bucket) {
Sasha Levinb67bfe02013-02-27 17:06:00 -0800950 sk_for_each(sk, &state->h->ht[state->bucket])
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +0900951 if (sock_net(sk) == seq_file_net(seq))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 goto found;
953 }
954 sk = NULL;
955found:
956 return sk;
957}
958
959static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
960{
Jianjun Kong5a5f3a82008-11-03 00:24:34 -0800961 struct raw_iter_state *state = raw_seq_private(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962
963 do {
964 sk = sk_next(sk);
965try_again:
966 ;
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +0900967 } while (sk && sock_net(sk) != seq_file_net(seq));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968
Pavel Emelyanovb673e4d2007-11-19 22:36:45 -0800969 if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800970 sk = sk_head(&state->h->ht[state->bucket]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 goto try_again;
972 }
973 return sk;
974}
975
976static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
977{
978 struct sock *sk = raw_get_first(seq);
979
980 if (sk)
981 while (pos && (sk = raw_get_next(seq, sk)) != NULL)
982 --pos;
983 return pos ? NULL : sk;
984}
985
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800986void *raw_seq_start(struct seq_file *seq, loff_t *pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987{
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800988 struct raw_iter_state *state = raw_seq_private(seq);
989
990 read_lock(&state->h->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
992}
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800993EXPORT_SYMBOL_GPL(raw_seq_start);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
Pavel Emelyanov42a73802007-11-19 22:38:33 -0800995void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996{
997 struct sock *sk;
998
999 if (v == SEQ_START_TOKEN)
1000 sk = raw_get_first(seq);
1001 else
1002 sk = raw_get_next(seq, v);
1003 ++*pos;
1004 return sk;
1005}
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001006EXPORT_SYMBOL_GPL(raw_seq_next);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001008void raw_seq_stop(struct seq_file *seq, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009{
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001010 struct raw_iter_state *state = raw_seq_private(seq);
1011
1012 read_unlock(&state->h->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013}
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001014EXPORT_SYMBOL_GPL(raw_seq_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015
Denis V. Lunev8cd850e2008-01-31 03:46:43 -08001016static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017{
1018 struct inet_sock *inet = inet_sk(sp);
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001019 __be32 dest = inet->inet_daddr,
1020 src = inet->inet_rcv_saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 __u16 destp = 0,
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001022 srcp = inet->inet_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
Denis V. Lunev8cd850e2008-01-31 03:46:43 -08001024 seq_printf(seq, "%4d: %08X:%04X %08X:%04X"
Francesco Fuscod14c5ab2013-08-15 13:42:14 +02001025 " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n",
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001026 i, src, srcp, dest, destp, sp->sk_state,
Eric Dumazet31e6d362009-06-17 19:05:41 -07001027 sk_wmem_alloc_get(sp),
1028 sk_rmem_alloc_get(sp),
Eric W. Biedermana7cb5a42012-05-24 01:10:10 -06001029 0, 0L, 0,
1030 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
1031 0, sock_i_ino(sp),
Wang Chen33c732c2007-11-13 20:30:01 -08001032 atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033}
1034
1035static int raw_seq_show(struct seq_file *seq, void *v)
1036{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 if (v == SEQ_START_TOKEN)
Denis V. Lunev8cd850e2008-01-31 03:46:43 -08001038 seq_printf(seq, " sl local_address rem_address st tx_queue "
1039 "rx_queue tr tm->when retrnsmt uid timeout "
Eric Dumazetcb61cb92008-06-17 21:04:56 -07001040 "inode ref pointer drops\n");
Denis V. Lunev8cd850e2008-01-31 03:46:43 -08001041 else
1042 raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 return 0;
1044}
1045
Stephen Hemmingerf6908082007-03-12 14:34:29 -07001046static const struct seq_operations raw_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 .start = raw_seq_start,
1048 .next = raw_seq_next,
1049 .stop = raw_seq_stop,
1050 .show = raw_seq_show,
1051};
1052
Denis V. Lunev3046d762008-01-31 03:48:55 -08001053int raw_seq_open(struct inode *ino, struct file *file,
1054 struct raw_hashinfo *h, const struct seq_operations *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055{
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001056 int err;
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001057 struct raw_iter_state *i;
1058
Denis V. Lunev3046d762008-01-31 03:48:55 -08001059 err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state));
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001060 if (err < 0)
1061 return err;
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001062
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001063 i = raw_seq_private((struct seq_file *)file->private_data);
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001064 i->h = h;
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001065 return 0;
1066}
1067EXPORT_SYMBOL_GPL(raw_seq_open);
1068
1069static int raw_v4_seq_open(struct inode *inode, struct file *file)
1070{
Denis V. Lunev3046d762008-01-31 03:48:55 -08001071 return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072}
1073
Arjan van de Ven9a321442007-02-12 00:55:35 -08001074static const struct file_operations raw_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 .owner = THIS_MODULE,
Pavel Emelyanov42a73802007-11-19 22:38:33 -08001076 .open = raw_v4_seq_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 .read = seq_read,
1078 .llseek = seq_lseek,
Pavel Emelyanovf51d5992008-01-14 05:35:57 -08001079 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080};
1081
Pavel Emelyanova308da12008-01-14 05:36:50 -08001082static __net_init int raw_init_net(struct net *net)
1083{
Gao fengd4beaa62013-02-18 01:34:54 +00001084 if (!proc_create("raw", S_IRUGO, net->proc_net, &raw_seq_fops))
Pavel Emelyanova308da12008-01-14 05:36:50 -08001085 return -ENOMEM;
1086
1087 return 0;
1088}
1089
1090static __net_exit void raw_exit_net(struct net *net)
1091{
Gao fengece31ff2013-02-18 01:34:56 +00001092 remove_proc_entry("raw", net->proc_net);
Pavel Emelyanova308da12008-01-14 05:36:50 -08001093}
1094
1095static __net_initdata struct pernet_operations raw_net_ops = {
1096 .init = raw_init_net,
1097 .exit = raw_exit_net,
1098};
1099
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100int __init raw_proc_init(void)
1101{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001102 return register_pernet_subsys(&raw_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103}
1104
1105void __init raw_proc_exit(void)
1106{
Pavel Emelyanova308da12008-01-14 05:36:50 -08001107 unregister_pernet_subsys(&raw_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108}
1109#endif /* CONFIG_PROC_FS */