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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
3 | * operating system. INET is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * RAW - implementation of IP "raw" sockets. | |
7 | * | |
02c30a84 | 8 | * Authors: Ross Biro |
1da177e4 LT |
9 | * 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 | */ | |
bf0d5249 | 39 | |
715b49ef | 40 | #include <linux/types.h> |
60063497 | 41 | #include <linux/atomic.h> |
1da177e4 LT |
42 | #include <asm/byteorder.h> |
43 | #include <asm/current.h> | |
44 | #include <asm/uaccess.h> | |
45 | #include <asm/ioctls.h> | |
1da177e4 LT |
46 | #include <linux/stddef.h> |
47 | #include <linux/slab.h> | |
48 | #include <linux/errno.h> | |
49 | #include <linux/aio.h> | |
50 | #include <linux/kernel.h> | |
bc3b2d7f | 51 | #include <linux/export.h> |
1da177e4 LT |
52 | #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> | |
1da177e4 | 60 | #include <linux/skbuff.h> |
457c4cbc | 61 | #include <net/net_namespace.h> |
1da177e4 LT |
62 | #include <net/dst.h> |
63 | #include <net/sock.h> | |
1da177e4 LT |
64 | #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> | |
c752f073 | 71 | #include <net/tcp_states.h> |
1da177e4 LT |
72 | #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> | |
709b46e8 | 80 | #include <linux/compat.h> |
1da177e4 | 81 | |
b673e4df | 82 | static struct raw_hashinfo raw_v4_hashinfo = { |
938b93ad | 83 | .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock), |
b673e4df | 84 | }; |
1da177e4 | 85 | |
fc8717ba | 86 | void raw_hash_sk(struct sock *sk) |
1da177e4 | 87 | { |
fc8717ba | 88 | struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
65b4c50b | 89 | struct hlist_head *head; |
1da177e4 | 90 | |
c720c7e8 | 91 | head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)]; |
65b4c50b PE |
92 | |
93 | write_lock_bh(&h->lock); | |
1da177e4 | 94 | sk_add_node(sk, head); |
c29a0bc4 | 95 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); |
65b4c50b PE |
96 | write_unlock_bh(&h->lock); |
97 | } | |
98 | EXPORT_SYMBOL_GPL(raw_hash_sk); | |
99 | ||
fc8717ba | 100 | void raw_unhash_sk(struct sock *sk) |
ab70768e | 101 | { |
fc8717ba PE |
102 | struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
103 | ||
ab70768e PE |
104 | write_lock_bh(&h->lock); |
105 | if (sk_del_node_init(sk)) | |
c29a0bc4 | 106 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
ab70768e PE |
107 | write_unlock_bh(&h->lock); |
108 | } | |
109 | EXPORT_SYMBOL_GPL(raw_unhash_sk); | |
110 | ||
be185884 PE |
111 | static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk, |
112 | unsigned short num, __be32 raddr, __be32 laddr, int dif) | |
1da177e4 LT |
113 | { |
114 | struct hlist_node *node; | |
115 | ||
116 | sk_for_each_from(sk, node) { | |
117 | struct inet_sock *inet = inet_sk(sk); | |
118 | ||
c720c7e8 ED |
119 | if (net_eq(sock_net(sk), net) && inet->inet_num == num && |
120 | !(inet->inet_daddr && inet->inet_daddr != raddr) && | |
121 | !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) && | |
1da177e4 LT |
122 | !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)) |
123 | goto found; /* gotcha */ | |
124 | } | |
125 | sk = NULL; | |
126 | found: | |
127 | return sk; | |
128 | } | |
129 | ||
130 | /* | |
131 | * 0 - deliver | |
132 | * 1 - block | |
133 | */ | |
134 | static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb) | |
135 | { | |
136 | int type; | |
137 | ||
138 | if (!pskb_may_pull(skb, sizeof(struct icmphdr))) | |
139 | return 1; | |
140 | ||
88c7664f | 141 | type = icmp_hdr(skb)->type; |
1da177e4 LT |
142 | if (type < 32) { |
143 | __u32 data = raw_sk(sk)->filter.data; | |
144 | ||
145 | return ((1 << type) & data) != 0; | |
146 | } | |
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 | */ | |
b71d1d42 | 158 | static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash) |
1da177e4 LT |
159 | { |
160 | struct sock *sk; | |
161 | struct hlist_head *head; | |
d13964f4 | 162 | int delivered = 0; |
be185884 | 163 | struct net *net; |
1da177e4 | 164 | |
b673e4df PE |
165 | read_lock(&raw_v4_hashinfo.lock); |
166 | head = &raw_v4_hashinfo.ht[hash]; | |
1da177e4 LT |
167 | if (hlist_empty(head)) |
168 | goto out; | |
be185884 | 169 | |
c346dca1 | 170 | net = dev_net(skb->dev); |
be185884 | 171 | sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol, |
1da177e4 LT |
172 | iph->saddr, iph->daddr, |
173 | skb->dev->ifindex); | |
174 | ||
175 | while (sk) { | |
d13964f4 | 176 | delivered = 1; |
1da177e4 LT |
177 | 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 | } | |
be185884 | 184 | sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol, |
1da177e4 LT |
185 | iph->saddr, iph->daddr, |
186 | skb->dev->ifindex); | |
187 | } | |
188 | out: | |
b673e4df | 189 | read_unlock(&raw_v4_hashinfo.lock); |
d13964f4 | 190 | return delivered; |
1da177e4 LT |
191 | } |
192 | ||
7bc54c90 PE |
193 | int raw_local_deliver(struct sk_buff *skb, int protocol) |
194 | { | |
195 | int hash; | |
196 | struct sock *raw_sk; | |
197 | ||
b673e4df PE |
198 | hash = protocol & (RAW_HTABLE_SIZE - 1); |
199 | raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); | |
7bc54c90 PE |
200 | |
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 | ||
211 | static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) | |
1da177e4 LT |
212 | { |
213 | struct inet_sock *inet = inet_sk(sk); | |
88c7664f ACM |
214 | const int type = icmp_hdr(skb)->type; |
215 | const int code = icmp_hdr(skb)->code; | |
1da177e4 LT |
216 | int err = 0; |
217 | int harderr = 0; | |
218 | ||
36393395 DM |
219 | if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) |
220 | ipv4_sk_update_pmtu(skb, sk, info); | |
221 | ||
1da177e4 LT |
222 | /* Report error on raw socket, if: |
223 | 1. User requested ip_recverr. | |
224 | 2. Socket is connected (otherwise the error indication | |
225 | is useless without ip_recverr and error is hard. | |
226 | */ | |
227 | if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED) | |
228 | return; | |
229 | ||
230 | switch (type) { | |
231 | default: | |
232 | case ICMP_TIME_EXCEEDED: | |
233 | err = EHOSTUNREACH; | |
234 | break; | |
235 | case ICMP_SOURCE_QUENCH: | |
236 | return; | |
237 | case ICMP_PARAMETERPROB: | |
238 | err = EPROTO; | |
239 | harderr = 1; | |
240 | break; | |
241 | case ICMP_DEST_UNREACH: | |
242 | err = EHOSTUNREACH; | |
243 | if (code > NR_ICMP_UNREACH) | |
244 | break; | |
245 | err = icmp_err_convert[code].errno; | |
246 | harderr = icmp_err_convert[code].fatal; | |
247 | if (code == ICMP_FRAG_NEEDED) { | |
248 | harderr = inet->pmtudisc != IP_PMTUDISC_DONT; | |
249 | err = EMSGSIZE; | |
250 | } | |
251 | } | |
252 | ||
253 | if (inet->recverr) { | |
b71d1d42 | 254 | const struct iphdr *iph = (const struct iphdr *)skb->data; |
1da177e4 LT |
255 | u8 *payload = skb->data + (iph->ihl << 2); |
256 | ||
257 | if (inet->hdrincl) | |
258 | payload = skb->data; | |
259 | ip_icmp_error(sk, skb, err, 0, info, payload); | |
260 | } | |
261 | ||
262 | if (inet->recverr || harderr) { | |
263 | sk->sk_err = err; | |
264 | sk->sk_error_report(sk); | |
265 | } | |
266 | } | |
267 | ||
7bc54c90 PE |
268 | void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) |
269 | { | |
270 | int hash; | |
271 | struct sock *raw_sk; | |
b71d1d42 | 272 | const struct iphdr *iph; |
be185884 | 273 | struct net *net; |
7bc54c90 | 274 | |
b673e4df | 275 | hash = protocol & (RAW_HTABLE_SIZE - 1); |
7bc54c90 | 276 | |
b673e4df PE |
277 | read_lock(&raw_v4_hashinfo.lock); |
278 | raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); | |
7bc54c90 | 279 | if (raw_sk != NULL) { |
b71d1d42 | 280 | iph = (const struct iphdr *)skb->data; |
c346dca1 | 281 | net = dev_net(skb->dev); |
be185884 PE |
282 | |
283 | while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol, | |
284 | iph->daddr, iph->saddr, | |
7bc54c90 PE |
285 | skb->dev->ifindex)) != NULL) { |
286 | raw_err(raw_sk, skb, info); | |
287 | raw_sk = sk_next(raw_sk); | |
b71d1d42 | 288 | iph = (const struct iphdr *)skb->data; |
7bc54c90 PE |
289 | } |
290 | } | |
b673e4df | 291 | read_unlock(&raw_v4_hashinfo.lock); |
7bc54c90 PE |
292 | } |
293 | ||
5e73ea1a | 294 | static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
295 | { |
296 | /* Charge it to the socket. */ | |
e905a9ed | 297 | |
d826eb14 ED |
298 | ipv4_pktinfo_prepare(skb); |
299 | if (sock_queue_rcv_skb(sk, skb) < 0) { | |
1da177e4 LT |
300 | kfree_skb(skb); |
301 | return NET_RX_DROP; | |
302 | } | |
303 | ||
304 | return NET_RX_SUCCESS; | |
305 | } | |
306 | ||
307 | int raw_rcv(struct sock *sk, struct sk_buff *skb) | |
308 | { | |
309 | if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { | |
33c732c3 | 310 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
311 | kfree_skb(skb); |
312 | return NET_RX_DROP; | |
313 | } | |
b59c2701 | 314 | nf_reset(skb); |
1da177e4 | 315 | |
d56f90a7 | 316 | skb_push(skb, skb->data - skb_network_header(skb)); |
1da177e4 LT |
317 | |
318 | raw_rcv_skb(sk, skb); | |
319 | return 0; | |
320 | } | |
321 | ||
77968b78 DM |
322 | static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, |
323 | void *from, size_t length, | |
324 | struct rtable **rtp, | |
325 | unsigned int flags) | |
1da177e4 LT |
326 | { |
327 | struct inet_sock *inet = inet_sk(sk); | |
0388b004 | 328 | struct net *net = sock_net(sk); |
1da177e4 LT |
329 | struct iphdr *iph; |
330 | struct sk_buff *skb; | |
f844c74f | 331 | unsigned int iphlen; |
1da177e4 | 332 | int err; |
1789a640 | 333 | struct rtable *rt = *rtp; |
66088243 | 334 | int hlen, tlen; |
1da177e4 | 335 | |
d8d1f30b | 336 | if (length > rt->dst.dev->mtu) { |
77968b78 | 337 | ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, |
d8d1f30b | 338 | rt->dst.dev->mtu); |
1da177e4 LT |
339 | return -EMSGSIZE; |
340 | } | |
341 | if (flags&MSG_PROBE) | |
342 | goto out; | |
343 | ||
66088243 HX |
344 | hlen = LL_RESERVED_SPACE(rt->dst.dev); |
345 | tlen = rt->dst.dev->needed_tailroom; | |
f5184d26 | 346 | skb = sock_alloc_send_skb(sk, |
66088243 | 347 | length + hlen + tlen + 15, |
f5184d26 | 348 | flags & MSG_DONTWAIT, &err); |
1da177e4 | 349 | if (skb == NULL) |
e905a9ed | 350 | goto error; |
66088243 | 351 | skb_reserve(skb, hlen); |
1da177e4 LT |
352 | |
353 | skb->priority = sk->sk_priority; | |
4a19ec58 | 354 | skb->mark = sk->sk_mark; |
d8d1f30b | 355 | skb_dst_set(skb, &rt->dst); |
1789a640 | 356 | *rtp = NULL; |
1da177e4 | 357 | |
7e28ecc2 | 358 | skb_reset_network_header(skb); |
eddc9ec5 | 359 | iph = ip_hdr(skb); |
7e28ecc2 | 360 | skb_put(skb, length); |
1da177e4 LT |
361 | |
362 | skb->ip_summed = CHECKSUM_NONE; | |
363 | ||
b0e380b1 | 364 | skb->transport_header = skb->network_header; |
55888dfb NH |
365 | err = -EFAULT; |
366 | if (memcpy_fromiovecend((void *)iph, from, 0, length)) | |
367 | goto error_free; | |
1da177e4 | 368 | |
f844c74f | 369 | iphlen = iph->ihl * 4; |
55888dfb NH |
370 | |
371 | /* | |
372 | * We don't want to modify the ip header, but we do need to | |
373 | * be sure that it won't cause problems later along the network | |
374 | * stack. Specifically we want to make sure that iph->ihl is a | |
375 | * sane value. If ihl points beyond the length of the buffer passed | |
376 | * in, reject the frame as invalid | |
377 | */ | |
378 | err = -EINVAL; | |
379 | if (iphlen > length) | |
380 | goto error_free; | |
381 | ||
382 | if (iphlen >= sizeof(*iph)) { | |
1da177e4 | 383 | if (!iph->saddr) |
77968b78 | 384 | iph->saddr = fl4->saddr; |
1da177e4 LT |
385 | iph->check = 0; |
386 | iph->tot_len = htons(length); | |
387 | if (!iph->id) | |
d8d1f30b | 388 | ip_select_ident(iph, &rt->dst, NULL); |
1da177e4 LT |
389 | |
390 | iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); | |
391 | } | |
96793b48 | 392 | if (iph->protocol == IPPROTO_ICMP) |
0388b004 | 393 | icmp_out_count(net, ((struct icmphdr *) |
96793b48 | 394 | skb_transport_header(skb))->type); |
1da177e4 | 395 | |
9bbc768a | 396 | err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL, |
d8d1f30b | 397 | rt->dst.dev, dst_output); |
1da177e4 | 398 | if (err > 0) |
6ce9e7b5 | 399 | err = net_xmit_errno(err); |
1da177e4 LT |
400 | if (err) |
401 | goto error; | |
402 | out: | |
403 | return 0; | |
404 | ||
55888dfb | 405 | error_free: |
1da177e4 LT |
406 | kfree_skb(skb); |
407 | error: | |
5e38e270 | 408 | IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); |
6ce9e7b5 ED |
409 | if (err == -ENOBUFS && !inet->recverr) |
410 | err = 0; | |
e905a9ed | 411 | return err; |
1da177e4 LT |
412 | } |
413 | ||
9d6ec938 | 414 | static int raw_probe_proto_opt(struct flowi4 *fl4, struct msghdr *msg) |
1da177e4 LT |
415 | { |
416 | struct iovec *iov; | |
417 | u8 __user *type = NULL; | |
418 | u8 __user *code = NULL; | |
419 | int probed = 0; | |
93765d8a | 420 | unsigned int i; |
1da177e4 LT |
421 | |
422 | if (!msg->msg_iov) | |
a27b58fe | 423 | return 0; |
1da177e4 LT |
424 | |
425 | for (i = 0; i < msg->msg_iovlen; i++) { | |
426 | iov = &msg->msg_iov[i]; | |
427 | if (!iov) | |
428 | continue; | |
429 | ||
9d6ec938 | 430 | switch (fl4->flowi4_proto) { |
1da177e4 LT |
431 | case IPPROTO_ICMP: |
432 | /* check if one-byte field is readable or not. */ | |
433 | if (iov->iov_base && iov->iov_len < 1) | |
434 | break; | |
435 | ||
436 | if (!type) { | |
437 | type = iov->iov_base; | |
438 | /* check if code field is readable or not. */ | |
439 | if (iov->iov_len > 1) | |
440 | code = type + 1; | |
441 | } else if (!code) | |
442 | code = iov->iov_base; | |
443 | ||
444 | if (type && code) { | |
9cce96df DM |
445 | if (get_user(fl4->fl4_icmp_type, type) || |
446 | get_user(fl4->fl4_icmp_code, code)) | |
a27b58fe | 447 | return -EFAULT; |
1da177e4 LT |
448 | probed = 1; |
449 | } | |
450 | break; | |
451 | default: | |
452 | probed = 1; | |
453 | break; | |
454 | } | |
455 | if (probed) | |
456 | break; | |
457 | } | |
a27b58fe | 458 | return 0; |
1da177e4 LT |
459 | } |
460 | ||
461 | static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, | |
462 | size_t len) | |
463 | { | |
464 | struct inet_sock *inet = inet_sk(sk); | |
465 | struct ipcm_cookie ipc; | |
466 | struct rtable *rt = NULL; | |
77968b78 | 467 | struct flowi4 fl4; |
1da177e4 | 468 | int free = 0; |
3ca3c68e | 469 | __be32 daddr; |
c1d18f9f | 470 | __be32 saddr; |
1da177e4 LT |
471 | u8 tos; |
472 | int err; | |
f6d8bd05 | 473 | struct ip_options_data opt_copy; |
1da177e4 LT |
474 | |
475 | err = -EMSGSIZE; | |
926d4b81 | 476 | if (len > 0xFFFF) |
1da177e4 LT |
477 | goto out; |
478 | ||
479 | /* | |
480 | * Check the flags. | |
481 | */ | |
482 | ||
483 | err = -EOPNOTSUPP; | |
484 | if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ | |
485 | goto out; /* compatibility */ | |
e905a9ed | 486 | |
1da177e4 | 487 | /* |
e905a9ed | 488 | * Get and verify the address. |
1da177e4 LT |
489 | */ |
490 | ||
491 | if (msg->msg_namelen) { | |
5a5f3a8d | 492 | struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name; |
1da177e4 LT |
493 | err = -EINVAL; |
494 | if (msg->msg_namelen < sizeof(*usin)) | |
495 | goto out; | |
496 | if (usin->sin_family != AF_INET) { | |
058bd4d2 JP |
497 | pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n", |
498 | __func__, current->comm); | |
1da177e4 LT |
499 | err = -EAFNOSUPPORT; |
500 | if (usin->sin_family) | |
501 | goto out; | |
502 | } | |
503 | daddr = usin->sin_addr.s_addr; | |
504 | /* ANK: I did not forget to get protocol from port field. | |
505 | * I just do not know, who uses this weirdness. | |
506 | * IP_HDRINCL is much more convenient. | |
507 | */ | |
508 | } else { | |
509 | err = -EDESTADDRREQ; | |
e905a9ed | 510 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 511 | goto out; |
c720c7e8 | 512 | daddr = inet->inet_daddr; |
1da177e4 LT |
513 | } |
514 | ||
c720c7e8 | 515 | ipc.addr = inet->inet_saddr; |
1da177e4 | 516 | ipc.opt = NULL; |
2244d07b | 517 | ipc.tx_flags = 0; |
1da177e4 LT |
518 | ipc.oif = sk->sk_bound_dev_if; |
519 | ||
520 | if (msg->msg_controllen) { | |
3b1e0a65 | 521 | err = ip_cmsg_send(sock_net(sk), msg, &ipc); |
1da177e4 LT |
522 | if (err) |
523 | goto out; | |
524 | if (ipc.opt) | |
525 | free = 1; | |
526 | } | |
527 | ||
528 | saddr = ipc.addr; | |
529 | ipc.addr = daddr; | |
530 | ||
f6d8bd05 ED |
531 | if (!ipc.opt) { |
532 | struct ip_options_rcu *inet_opt; | |
533 | ||
534 | rcu_read_lock(); | |
535 | inet_opt = rcu_dereference(inet->inet_opt); | |
536 | if (inet_opt) { | |
537 | memcpy(&opt_copy, inet_opt, | |
538 | sizeof(*inet_opt) + inet_opt->opt.optlen); | |
539 | ipc.opt = &opt_copy.opt; | |
540 | } | |
541 | rcu_read_unlock(); | |
542 | } | |
1da177e4 LT |
543 | |
544 | if (ipc.opt) { | |
545 | err = -EINVAL; | |
546 | /* Linux does not mangle headers on raw sockets, | |
547 | * so that IP options + IP_HDRINCL is non-sense. | |
548 | */ | |
549 | if (inet->hdrincl) | |
550 | goto done; | |
f6d8bd05 | 551 | if (ipc.opt->opt.srr) { |
1da177e4 LT |
552 | if (!daddr) |
553 | goto done; | |
f6d8bd05 | 554 | daddr = ipc.opt->opt.faddr; |
1da177e4 LT |
555 | } |
556 | } | |
557 | tos = RT_CONN_FLAGS(sk); | |
558 | if (msg->msg_flags & MSG_DONTROUTE) | |
559 | tos |= RTO_ONLINK; | |
560 | ||
f97c1e0c | 561 | if (ipv4_is_multicast(daddr)) { |
1da177e4 LT |
562 | if (!ipc.oif) |
563 | ipc.oif = inet->mc_index; | |
564 | if (!saddr) | |
565 | saddr = inet->mc_addr; | |
76e21053 EH |
566 | } else if (!ipc.oif) |
567 | ipc.oif = inet->uc_index; | |
1da177e4 | 568 | |
77968b78 DM |
569 | flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos, |
570 | RT_SCOPE_UNIVERSE, | |
571 | inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, | |
47670b76 JA |
572 | inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP, |
573 | daddr, saddr, 0, 0); | |
ef164ae3 | 574 | |
77968b78 DM |
575 | if (!inet->hdrincl) { |
576 | err = raw_probe_proto_opt(&fl4, msg); | |
577 | if (err) | |
b23dd4fe | 578 | goto done; |
77968b78 DM |
579 | } |
580 | ||
581 | security_sk_classify_flow(sk, flowi4_to_flowi(&fl4)); | |
582 | rt = ip_route_output_flow(sock_net(sk), &fl4, sk); | |
583 | if (IS_ERR(rt)) { | |
584 | err = PTR_ERR(rt); | |
585 | rt = NULL; | |
586 | goto done; | |
1da177e4 | 587 | } |
1da177e4 LT |
588 | |
589 | err = -EACCES; | |
590 | if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST)) | |
591 | goto done; | |
592 | ||
593 | if (msg->msg_flags & MSG_CONFIRM) | |
594 | goto do_confirm; | |
595 | back_from_confirm: | |
596 | ||
597 | if (inet->hdrincl) | |
77968b78 DM |
598 | err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len, |
599 | &rt, msg->msg_flags); | |
e905a9ed | 600 | |
1da177e4 LT |
601 | else { |
602 | if (!ipc.addr) | |
77968b78 | 603 | ipc.addr = fl4.daddr; |
1da177e4 | 604 | lock_sock(sk); |
f5fca608 | 605 | err = ip_append_data(sk, &fl4, ip_generic_getfrag, |
77968b78 DM |
606 | msg->msg_iov, len, 0, |
607 | &ipc, &rt, msg->msg_flags); | |
1da177e4 LT |
608 | if (err) |
609 | ip_flush_pending_frames(sk); | |
6ce9e7b5 | 610 | else if (!(msg->msg_flags & MSG_MORE)) { |
77968b78 | 611 | err = ip_push_pending_frames(sk, &fl4); |
6ce9e7b5 ED |
612 | if (err == -ENOBUFS && !inet->recverr) |
613 | err = 0; | |
614 | } | |
1da177e4 LT |
615 | release_sock(sk); |
616 | } | |
617 | done: | |
618 | if (free) | |
619 | kfree(ipc.opt); | |
620 | ip_rt_put(rt); | |
621 | ||
5418c692 JJ |
622 | out: |
623 | if (err < 0) | |
624 | return err; | |
625 | return len; | |
1da177e4 LT |
626 | |
627 | do_confirm: | |
d8d1f30b | 628 | dst_confirm(&rt->dst); |
1da177e4 LT |
629 | if (!(msg->msg_flags & MSG_PROBE) || len) |
630 | goto back_from_confirm; | |
631 | err = 0; | |
632 | goto done; | |
633 | } | |
634 | ||
635 | static void raw_close(struct sock *sk, long timeout) | |
636 | { | |
e905a9ed | 637 | /* |
25985edc | 638 | * Raw sockets may have direct kernel references. Kill them. |
1da177e4 LT |
639 | */ |
640 | ip_ra_control(sk, 0, NULL); | |
641 | ||
642 | sk_common_release(sk); | |
643 | } | |
644 | ||
7d06b2e0 | 645 | static void raw_destroy(struct sock *sk) |
22dd4850 DL |
646 | { |
647 | lock_sock(sk); | |
648 | ip_flush_pending_frames(sk); | |
649 | release_sock(sk); | |
22dd4850 DL |
650 | } |
651 | ||
1da177e4 LT |
652 | /* This gets rid of all the nasties in af_inet. -DaveM */ |
653 | static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
654 | { | |
655 | struct inet_sock *inet = inet_sk(sk); | |
656 | struct sockaddr_in *addr = (struct sockaddr_in *) uaddr; | |
657 | int ret = -EINVAL; | |
658 | int chk_addr_ret; | |
659 | ||
660 | if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) | |
661 | goto out; | |
3b1e0a65 | 662 | chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr); |
1da177e4 LT |
663 | ret = -EADDRNOTAVAIL; |
664 | if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL && | |
665 | chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST) | |
666 | goto out; | |
c720c7e8 | 667 | inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; |
1da177e4 | 668 | if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) |
c720c7e8 | 669 | inet->inet_saddr = 0; /* Use device */ |
1da177e4 LT |
670 | sk_dst_reset(sk); |
671 | ret = 0; | |
672 | out: return ret; | |
673 | } | |
674 | ||
675 | /* | |
676 | * This should be easy, if there is something there | |
677 | * we return it, otherwise we block. | |
678 | */ | |
679 | ||
680 | static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, | |
681 | size_t len, int noblock, int flags, int *addr_len) | |
682 | { | |
683 | struct inet_sock *inet = inet_sk(sk); | |
684 | size_t copied = 0; | |
685 | int err = -EOPNOTSUPP; | |
686 | struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name; | |
687 | struct sk_buff *skb; | |
688 | ||
689 | if (flags & MSG_OOB) | |
690 | goto out; | |
691 | ||
692 | if (addr_len) | |
693 | *addr_len = sizeof(*sin); | |
694 | ||
695 | if (flags & MSG_ERRQUEUE) { | |
696 | err = ip_recv_error(sk, msg, len); | |
697 | goto out; | |
698 | } | |
699 | ||
700 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
701 | if (!skb) | |
702 | goto out; | |
703 | ||
704 | copied = skb->len; | |
705 | if (len < copied) { | |
706 | msg->msg_flags |= MSG_TRUNC; | |
707 | copied = len; | |
708 | } | |
709 | ||
710 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
711 | if (err) | |
712 | goto done; | |
713 | ||
3b885787 | 714 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
715 | |
716 | /* Copy the address. */ | |
717 | if (sin) { | |
718 | sin->sin_family = AF_INET; | |
eddc9ec5 | 719 | sin->sin_addr.s_addr = ip_hdr(skb)->saddr; |
f59fc7f3 | 720 | sin->sin_port = 0; |
1da177e4 LT |
721 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); |
722 | } | |
723 | if (inet->cmsg_flags) | |
724 | ip_cmsg_recv(msg, skb); | |
725 | if (flags & MSG_TRUNC) | |
726 | copied = skb->len; | |
727 | done: | |
728 | skb_free_datagram(sk, skb); | |
5418c692 JJ |
729 | out: |
730 | if (err) | |
731 | return err; | |
732 | return copied; | |
1da177e4 LT |
733 | } |
734 | ||
735 | static int raw_init(struct sock *sk) | |
736 | { | |
737 | struct raw_sock *rp = raw_sk(sk); | |
738 | ||
c720c7e8 | 739 | if (inet_sk(sk)->inet_num == IPPROTO_ICMP) |
1da177e4 LT |
740 | memset(&rp->filter, 0, sizeof(rp->filter)); |
741 | return 0; | |
742 | } | |
743 | ||
744 | static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen) | |
745 | { | |
746 | if (optlen > sizeof(struct icmp_filter)) | |
747 | optlen = sizeof(struct icmp_filter); | |
748 | if (copy_from_user(&raw_sk(sk)->filter, optval, optlen)) | |
749 | return -EFAULT; | |
750 | return 0; | |
751 | } | |
752 | ||
753 | static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen) | |
754 | { | |
755 | int len, ret = -EFAULT; | |
756 | ||
757 | if (get_user(len, optlen)) | |
758 | goto out; | |
759 | ret = -EINVAL; | |
760 | if (len < 0) | |
761 | goto out; | |
762 | if (len > sizeof(struct icmp_filter)) | |
763 | len = sizeof(struct icmp_filter); | |
764 | ret = -EFAULT; | |
765 | if (put_user(len, optlen) || | |
766 | copy_to_user(optval, &raw_sk(sk)->filter, len)) | |
767 | goto out; | |
768 | ret = 0; | |
769 | out: return ret; | |
770 | } | |
771 | ||
3fdadf7d | 772 | static int do_raw_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 773 | char __user *optval, unsigned int optlen) |
1da177e4 | 774 | { |
1da177e4 | 775 | if (optname == ICMP_FILTER) { |
c720c7e8 | 776 | if (inet_sk(sk)->inet_num != IPPROTO_ICMP) |
1da177e4 LT |
777 | return -EOPNOTSUPP; |
778 | else | |
779 | return raw_seticmpfilter(sk, optval, optlen); | |
780 | } | |
781 | return -ENOPROTOOPT; | |
782 | } | |
783 | ||
3fdadf7d | 784 | static int raw_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 785 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
786 | { |
787 | if (level != SOL_RAW) | |
3fdadf7d DM |
788 | return ip_setsockopt(sk, level, optname, optval, optlen); |
789 | return do_raw_setsockopt(sk, level, optname, optval, optlen); | |
790 | } | |
1da177e4 | 791 | |
3fdadf7d DM |
792 | #ifdef CONFIG_COMPAT |
793 | static int compat_raw_setsockopt(struct sock *sk, int level, int optname, | |
b7058842 | 794 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
795 | { |
796 | if (level != SOL_RAW) | |
543d9cfe | 797 | return compat_ip_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
798 | return do_raw_setsockopt(sk, level, optname, optval, optlen); |
799 | } | |
800 | #endif | |
801 | ||
802 | static int do_raw_getsockopt(struct sock *sk, int level, int optname, | |
803 | char __user *optval, int __user *optlen) | |
804 | { | |
1da177e4 | 805 | if (optname == ICMP_FILTER) { |
c720c7e8 | 806 | if (inet_sk(sk)->inet_num != IPPROTO_ICMP) |
1da177e4 LT |
807 | return -EOPNOTSUPP; |
808 | else | |
809 | return raw_geticmpfilter(sk, optval, optlen); | |
810 | } | |
811 | return -ENOPROTOOPT; | |
812 | } | |
813 | ||
3fdadf7d DM |
814 | static int raw_getsockopt(struct sock *sk, int level, int optname, |
815 | char __user *optval, int __user *optlen) | |
816 | { | |
817 | if (level != SOL_RAW) | |
818 | return ip_getsockopt(sk, level, optname, optval, optlen); | |
819 | return do_raw_getsockopt(sk, level, optname, optval, optlen); | |
820 | } | |
821 | ||
822 | #ifdef CONFIG_COMPAT | |
823 | static int compat_raw_getsockopt(struct sock *sk, int level, int optname, | |
543d9cfe | 824 | char __user *optval, int __user *optlen) |
3fdadf7d DM |
825 | { |
826 | if (level != SOL_RAW) | |
543d9cfe | 827 | return compat_ip_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
828 | return do_raw_getsockopt(sk, level, optname, optval, optlen); |
829 | } | |
830 | #endif | |
831 | ||
1da177e4 LT |
832 | static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) |
833 | { | |
834 | switch (cmd) { | |
4500ebf8 JP |
835 | case SIOCOUTQ: { |
836 | int amount = sk_wmem_alloc_get(sk); | |
31e6d363 | 837 | |
4500ebf8 JP |
838 | return put_user(amount, (int __user *)arg); |
839 | } | |
840 | case SIOCINQ: { | |
841 | struct sk_buff *skb; | |
842 | int amount = 0; | |
843 | ||
844 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
845 | skb = skb_peek(&sk->sk_receive_queue); | |
846 | if (skb != NULL) | |
847 | amount = skb->len; | |
848 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
849 | return put_user(amount, (int __user *)arg); | |
850 | } | |
1da177e4 | 851 | |
4500ebf8 | 852 | default: |
1da177e4 | 853 | #ifdef CONFIG_IP_MROUTE |
4500ebf8 | 854 | return ipmr_ioctl(sk, cmd, (void __user *)arg); |
1da177e4 | 855 | #else |
4500ebf8 | 856 | return -ENOIOCTLCMD; |
1da177e4 LT |
857 | #endif |
858 | } | |
859 | } | |
860 | ||
709b46e8 EB |
861 | #ifdef CONFIG_COMPAT |
862 | static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) | |
863 | { | |
864 | switch (cmd) { | |
865 | case SIOCOUTQ: | |
866 | case SIOCINQ: | |
867 | return -ENOIOCTLCMD; | |
868 | default: | |
869 | #ifdef CONFIG_IP_MROUTE | |
870 | return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg)); | |
871 | #else | |
872 | return -ENOIOCTLCMD; | |
873 | #endif | |
874 | } | |
875 | } | |
876 | #endif | |
877 | ||
1da177e4 | 878 | struct proto raw_prot = { |
543d9cfe ACM |
879 | .name = "RAW", |
880 | .owner = THIS_MODULE, | |
881 | .close = raw_close, | |
22dd4850 | 882 | .destroy = raw_destroy, |
543d9cfe ACM |
883 | .connect = ip4_datagram_connect, |
884 | .disconnect = udp_disconnect, | |
885 | .ioctl = raw_ioctl, | |
886 | .init = raw_init, | |
887 | .setsockopt = raw_setsockopt, | |
888 | .getsockopt = raw_getsockopt, | |
889 | .sendmsg = raw_sendmsg, | |
890 | .recvmsg = raw_recvmsg, | |
891 | .bind = raw_bind, | |
892 | .backlog_rcv = raw_rcv_skb, | |
fc8717ba PE |
893 | .hash = raw_hash_sk, |
894 | .unhash = raw_unhash_sk, | |
543d9cfe | 895 | .obj_size = sizeof(struct raw_sock), |
fc8717ba | 896 | .h.raw_hash = &raw_v4_hashinfo, |
3fdadf7d | 897 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
898 | .compat_setsockopt = compat_raw_setsockopt, |
899 | .compat_getsockopt = compat_raw_getsockopt, | |
709b46e8 | 900 | .compat_ioctl = compat_raw_ioctl, |
3fdadf7d | 901 | #endif |
1da177e4 LT |
902 | }; |
903 | ||
904 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
905 | static struct sock *raw_get_first(struct seq_file *seq) |
906 | { | |
907 | struct sock *sk; | |
5a5f3a8d | 908 | struct raw_iter_state *state = raw_seq_private(seq); |
1da177e4 | 909 | |
b673e4df PE |
910 | for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; |
911 | ++state->bucket) { | |
1da177e4 LT |
912 | struct hlist_node *node; |
913 | ||
42a73808 | 914 | sk_for_each(sk, node, &state->h->ht[state->bucket]) |
1218854a | 915 | if (sock_net(sk) == seq_file_net(seq)) |
1da177e4 LT |
916 | goto found; |
917 | } | |
918 | sk = NULL; | |
919 | found: | |
920 | return sk; | |
921 | } | |
922 | ||
923 | static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) | |
924 | { | |
5a5f3a8d | 925 | struct raw_iter_state *state = raw_seq_private(seq); |
1da177e4 LT |
926 | |
927 | do { | |
928 | sk = sk_next(sk); | |
929 | try_again: | |
930 | ; | |
1218854a | 931 | } while (sk && sock_net(sk) != seq_file_net(seq)); |
1da177e4 | 932 | |
b673e4df | 933 | if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { |
42a73808 | 934 | sk = sk_head(&state->h->ht[state->bucket]); |
1da177e4 LT |
935 | goto try_again; |
936 | } | |
937 | return sk; | |
938 | } | |
939 | ||
940 | static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos) | |
941 | { | |
942 | struct sock *sk = raw_get_first(seq); | |
943 | ||
944 | if (sk) | |
945 | while (pos && (sk = raw_get_next(seq, sk)) != NULL) | |
946 | --pos; | |
947 | return pos ? NULL : sk; | |
948 | } | |
949 | ||
42a73808 | 950 | void *raw_seq_start(struct seq_file *seq, loff_t *pos) |
1da177e4 | 951 | { |
42a73808 PE |
952 | struct raw_iter_state *state = raw_seq_private(seq); |
953 | ||
954 | read_lock(&state->h->lock); | |
1da177e4 LT |
955 | return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
956 | } | |
42a73808 | 957 | EXPORT_SYMBOL_GPL(raw_seq_start); |
1da177e4 | 958 | |
42a73808 | 959 | void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
1da177e4 LT |
960 | { |
961 | struct sock *sk; | |
962 | ||
963 | if (v == SEQ_START_TOKEN) | |
964 | sk = raw_get_first(seq); | |
965 | else | |
966 | sk = raw_get_next(seq, v); | |
967 | ++*pos; | |
968 | return sk; | |
969 | } | |
42a73808 | 970 | EXPORT_SYMBOL_GPL(raw_seq_next); |
1da177e4 | 971 | |
42a73808 | 972 | void raw_seq_stop(struct seq_file *seq, void *v) |
1da177e4 | 973 | { |
42a73808 PE |
974 | struct raw_iter_state *state = raw_seq_private(seq); |
975 | ||
976 | read_unlock(&state->h->lock); | |
1da177e4 | 977 | } |
42a73808 | 978 | EXPORT_SYMBOL_GPL(raw_seq_stop); |
1da177e4 | 979 | |
8cd850ef | 980 | static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1da177e4 LT |
981 | { |
982 | struct inet_sock *inet = inet_sk(sp); | |
c720c7e8 ED |
983 | __be32 dest = inet->inet_daddr, |
984 | src = inet->inet_rcv_saddr; | |
1da177e4 | 985 | __u16 destp = 0, |
c720c7e8 | 986 | srcp = inet->inet_num; |
1da177e4 | 987 | |
8cd850ef | 988 | seq_printf(seq, "%4d: %08X:%04X %08X:%04X" |
71338aa7 | 989 | " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n", |
e905a9ed | 990 | i, src, srcp, dest, destp, sp->sk_state, |
31e6d363 ED |
991 | sk_wmem_alloc_get(sp), |
992 | sk_rmem_alloc_get(sp), | |
1da177e4 | 993 | 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp), |
33c732c3 | 994 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4 LT |
995 | } |
996 | ||
997 | static int raw_seq_show(struct seq_file *seq, void *v) | |
998 | { | |
1da177e4 | 999 | if (v == SEQ_START_TOKEN) |
8cd850ef DL |
1000 | seq_printf(seq, " sl local_address rem_address st tx_queue " |
1001 | "rx_queue tr tm->when retrnsmt uid timeout " | |
cb61cb9b | 1002 | "inode ref pointer drops\n"); |
8cd850ef DL |
1003 | else |
1004 | raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); | |
1da177e4 LT |
1005 | return 0; |
1006 | } | |
1007 | ||
f690808e | 1008 | static const struct seq_operations raw_seq_ops = { |
1da177e4 LT |
1009 | .start = raw_seq_start, |
1010 | .next = raw_seq_next, | |
1011 | .stop = raw_seq_stop, | |
1012 | .show = raw_seq_show, | |
1013 | }; | |
1014 | ||
3046d767 DL |
1015 | int raw_seq_open(struct inode *ino, struct file *file, |
1016 | struct raw_hashinfo *h, const struct seq_operations *ops) | |
1da177e4 | 1017 | { |
f51d599f | 1018 | int err; |
42a73808 PE |
1019 | struct raw_iter_state *i; |
1020 | ||
3046d767 | 1021 | err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state)); |
f51d599f PE |
1022 | if (err < 0) |
1023 | return err; | |
42a73808 | 1024 | |
f51d599f | 1025 | i = raw_seq_private((struct seq_file *)file->private_data); |
42a73808 | 1026 | i->h = h; |
42a73808 PE |
1027 | return 0; |
1028 | } | |
1029 | EXPORT_SYMBOL_GPL(raw_seq_open); | |
1030 | ||
1031 | static int raw_v4_seq_open(struct inode *inode, struct file *file) | |
1032 | { | |
3046d767 | 1033 | return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops); |
1da177e4 LT |
1034 | } |
1035 | ||
9a32144e | 1036 | static const struct file_operations raw_seq_fops = { |
1da177e4 | 1037 | .owner = THIS_MODULE, |
42a73808 | 1038 | .open = raw_v4_seq_open, |
1da177e4 LT |
1039 | .read = seq_read, |
1040 | .llseek = seq_lseek, | |
f51d599f | 1041 | .release = seq_release_net, |
1da177e4 LT |
1042 | }; |
1043 | ||
a308da16 | 1044 | static __net_init int raw_init_net(struct net *net) |
1da177e4 | 1045 | { |
a308da16 | 1046 | if (!proc_net_fops_create(net, "raw", S_IRUGO, &raw_seq_fops)) |
1da177e4 | 1047 | return -ENOMEM; |
a308da16 | 1048 | |
1da177e4 LT |
1049 | return 0; |
1050 | } | |
1051 | ||
a308da16 PE |
1052 | static __net_exit void raw_exit_net(struct net *net) |
1053 | { | |
1054 | proc_net_remove(net, "raw"); | |
1055 | } | |
1056 | ||
1057 | static __net_initdata struct pernet_operations raw_net_ops = { | |
1058 | .init = raw_init_net, | |
1059 | .exit = raw_exit_net, | |
1060 | }; | |
1061 | ||
1062 | int __init raw_proc_init(void) | |
1063 | { | |
1064 | return register_pernet_subsys(&raw_net_ops); | |
1065 | } | |
1066 | ||
1da177e4 LT |
1067 | void __init raw_proc_exit(void) |
1068 | { | |
a308da16 | 1069 | unregister_pernet_subsys(&raw_net_ops); |
1da177e4 LT |
1070 | } |
1071 | #endif /* CONFIG_PROC_FS */ |