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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
4 | * operating system. INET is implemented using the BSD Socket | |
5 | * interface as the means of communication with the user level. | |
6 | * | |
7 | * RAW - implementation of IP "raw" sockets. | |
8 | * | |
02c30a84 | 9 | * Authors: Ross Biro |
1da177e4 LT |
10 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
11 | * | |
12 | * Fixes: | |
13 | * Alan Cox : verify_area() fixed up | |
14 | * Alan Cox : ICMP error handling | |
15 | * Alan Cox : EMSGSIZE if you send too big a packet | |
16 | * Alan Cox : Now uses generic datagrams and shared | |
17 | * skbuff library. No more peek crashes, | |
18 | * no more backlogs | |
19 | * Alan Cox : Checks sk->broadcast. | |
20 | * Alan Cox : Uses skb_free_datagram/skb_copy_datagram | |
21 | * Alan Cox : Raw passes ip options too | |
22 | * Alan Cox : Setsocketopt added | |
23 | * Alan Cox : Fixed error return for broadcasts | |
24 | * Alan Cox : Removed wake_up calls | |
25 | * Alan Cox : Use ttl/tos | |
26 | * Alan Cox : Cleaned up old debugging | |
27 | * Alan Cox : Use new kernel side addresses | |
28 | * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets. | |
29 | * Alan Cox : BSD style RAW socket demultiplexing. | |
30 | * Alan Cox : Beginnings of mrouted support. | |
31 | * Alan Cox : Added IP_HDRINCL option. | |
32 | * Alan Cox : Skip broadcast check if BSDism set. | |
33 | * David S. Miller : New socket lookup architecture. | |
1da177e4 | 34 | */ |
bf0d5249 | 35 | |
715b49ef | 36 | #include <linux/types.h> |
60063497 | 37 | #include <linux/atomic.h> |
1da177e4 LT |
38 | #include <asm/byteorder.h> |
39 | #include <asm/current.h> | |
7c0f6ba6 | 40 | #include <linux/uaccess.h> |
1da177e4 | 41 | #include <asm/ioctls.h> |
1da177e4 LT |
42 | #include <linux/stddef.h> |
43 | #include <linux/slab.h> | |
44 | #include <linux/errno.h> | |
1da177e4 | 45 | #include <linux/kernel.h> |
bc3b2d7f | 46 | #include <linux/export.h> |
1da177e4 LT |
47 | #include <linux/spinlock.h> |
48 | #include <linux/sockios.h> | |
49 | #include <linux/socket.h> | |
50 | #include <linux/in.h> | |
51 | #include <linux/mroute.h> | |
52 | #include <linux/netdevice.h> | |
53 | #include <linux/in_route.h> | |
54 | #include <linux/route.h> | |
1da177e4 | 55 | #include <linux/skbuff.h> |
f5220d63 | 56 | #include <linux/igmp.h> |
457c4cbc | 57 | #include <net/net_namespace.h> |
1da177e4 LT |
58 | #include <net/dst.h> |
59 | #include <net/sock.h> | |
1da177e4 LT |
60 | #include <linux/ip.h> |
61 | #include <linux/net.h> | |
62 | #include <net/ip.h> | |
63 | #include <net/icmp.h> | |
64 | #include <net/udp.h> | |
65 | #include <net/raw.h> | |
66 | #include <net/snmp.h> | |
c752f073 | 67 | #include <net/tcp_states.h> |
1da177e4 LT |
68 | #include <net/inet_common.h> |
69 | #include <net/checksum.h> | |
70 | #include <net/xfrm.h> | |
71 | #include <linux/rtnetlink.h> | |
72 | #include <linux/proc_fs.h> | |
73 | #include <linux/seq_file.h> | |
74 | #include <linux/netfilter.h> | |
75 | #include <linux/netfilter_ipv4.h> | |
709b46e8 | 76 | #include <linux/compat.h> |
c008ba5b HX |
77 | #include <linux/uio.h> |
78 | ||
79 | struct raw_frag_vec { | |
b61e9dcc | 80 | struct msghdr *msg; |
c008ba5b HX |
81 | union { |
82 | struct icmphdr icmph; | |
83 | char c[1]; | |
84 | } hdr; | |
85 | int hlen; | |
86 | }; | |
1da177e4 | 87 | |
432490f9 | 88 | struct raw_hashinfo raw_v4_hashinfo = { |
938b93ad | 89 | .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock), |
b673e4df | 90 | }; |
432490f9 | 91 | EXPORT_SYMBOL_GPL(raw_v4_hashinfo); |
1da177e4 | 92 | |
086c653f | 93 | int raw_hash_sk(struct sock *sk) |
1da177e4 | 94 | { |
fc8717ba | 95 | struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
65b4c50b | 96 | struct hlist_head *head; |
1da177e4 | 97 | |
c720c7e8 | 98 | head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)]; |
65b4c50b PE |
99 | |
100 | write_lock_bh(&h->lock); | |
1da177e4 | 101 | sk_add_node(sk, head); |
65b4c50b | 102 | write_unlock_bh(&h->lock); |
b3cb764a | 103 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); |
086c653f CG |
104 | |
105 | return 0; | |
65b4c50b PE |
106 | } |
107 | EXPORT_SYMBOL_GPL(raw_hash_sk); | |
108 | ||
fc8717ba | 109 | void raw_unhash_sk(struct sock *sk) |
ab70768e | 110 | { |
fc8717ba PE |
111 | struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
112 | ||
ab70768e PE |
113 | write_lock_bh(&h->lock); |
114 | if (sk_del_node_init(sk)) | |
c29a0bc4 | 115 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
ab70768e PE |
116 | write_unlock_bh(&h->lock); |
117 | } | |
118 | EXPORT_SYMBOL_GPL(raw_unhash_sk); | |
119 | ||
432490f9 | 120 | struct sock *__raw_v4_lookup(struct net *net, struct sock *sk, |
67359930 DA |
121 | unsigned short num, __be32 raddr, __be32 laddr, |
122 | int dif, int sdif) | |
1da177e4 | 123 | { |
b67bfe0d | 124 | sk_for_each_from(sk) { |
1da177e4 LT |
125 | struct inet_sock *inet = inet_sk(sk); |
126 | ||
c720c7e8 ED |
127 | if (net_eq(sock_net(sk), net) && inet->inet_num == num && |
128 | !(inet->inet_daddr && inet->inet_daddr != raddr) && | |
129 | !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) && | |
7055420f | 130 | raw_sk_bound_dev_eq(net, sk->sk_bound_dev_if, dif, sdif)) |
1da177e4 LT |
131 | goto found; /* gotcha */ |
132 | } | |
133 | sk = NULL; | |
134 | found: | |
135 | return sk; | |
136 | } | |
432490f9 | 137 | EXPORT_SYMBOL_GPL(__raw_v4_lookup); |
1da177e4 LT |
138 | |
139 | /* | |
140 | * 0 - deliver | |
141 | * 1 - block | |
142 | */ | |
ab43ed8b | 143 | static int icmp_filter(const struct sock *sk, const struct sk_buff *skb) |
1da177e4 | 144 | { |
ab43ed8b ED |
145 | struct icmphdr _hdr; |
146 | const struct icmphdr *hdr; | |
1da177e4 | 147 | |
ab43ed8b ED |
148 | hdr = skb_header_pointer(skb, skb_transport_offset(skb), |
149 | sizeof(_hdr), &_hdr); | |
150 | if (!hdr) | |
1da177e4 LT |
151 | return 1; |
152 | ||
ab43ed8b | 153 | if (hdr->type < 32) { |
1da177e4 LT |
154 | __u32 data = raw_sk(sk)->filter.data; |
155 | ||
ab43ed8b | 156 | return ((1U << hdr->type) & data) != 0; |
1da177e4 LT |
157 | } |
158 | ||
159 | /* Do not block unknown ICMP types */ | |
160 | return 0; | |
161 | } | |
162 | ||
163 | /* IP input processing comes here for RAW socket delivery. | |
164 | * Caller owns SKB, so we must make clones. | |
165 | * | |
166 | * RFC 1122: SHOULD pass TOS value up to the transport layer. | |
167 | * -> It does. And not only TOS, but all IP header. | |
168 | */ | |
b71d1d42 | 169 | static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash) |
1da177e4 | 170 | { |
67359930 | 171 | int sdif = inet_sdif(skb); |
19e4e768 | 172 | int dif = inet_iif(skb); |
1da177e4 LT |
173 | struct sock *sk; |
174 | struct hlist_head *head; | |
d13964f4 | 175 | int delivered = 0; |
be185884 | 176 | struct net *net; |
1da177e4 | 177 | |
b673e4df PE |
178 | read_lock(&raw_v4_hashinfo.lock); |
179 | head = &raw_v4_hashinfo.ht[hash]; | |
1da177e4 LT |
180 | if (hlist_empty(head)) |
181 | goto out; | |
be185884 | 182 | |
c346dca1 | 183 | net = dev_net(skb->dev); |
be185884 | 184 | sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol, |
19e4e768 | 185 | iph->saddr, iph->daddr, dif, sdif); |
1da177e4 LT |
186 | |
187 | while (sk) { | |
d13964f4 | 188 | delivered = 1; |
f5220d63 QA |
189 | if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) && |
190 | ip_mc_sf_allow(sk, iph->daddr, iph->saddr, | |
60d9b031 | 191 | skb->dev->ifindex, sdif)) { |
1da177e4 LT |
192 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
193 | ||
194 | /* Not releasing hash table! */ | |
195 | if (clone) | |
196 | raw_rcv(sk, clone); | |
197 | } | |
be185884 | 198 | sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol, |
1da177e4 | 199 | iph->saddr, iph->daddr, |
38c73529 | 200 | dif, sdif); |
1da177e4 LT |
201 | } |
202 | out: | |
b673e4df | 203 | read_unlock(&raw_v4_hashinfo.lock); |
d13964f4 | 204 | return delivered; |
1da177e4 LT |
205 | } |
206 | ||
7bc54c90 PE |
207 | int raw_local_deliver(struct sk_buff *skb, int protocol) |
208 | { | |
209 | int hash; | |
210 | struct sock *raw_sk; | |
211 | ||
b673e4df PE |
212 | hash = protocol & (RAW_HTABLE_SIZE - 1); |
213 | raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); | |
7bc54c90 PE |
214 | |
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 | ||
225 | static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) | |
1da177e4 LT |
226 | { |
227 | struct inet_sock *inet = inet_sk(sk); | |
88c7664f ACM |
228 | const int type = icmp_hdr(skb)->type; |
229 | const int code = icmp_hdr(skb)->code; | |
1da177e4 LT |
230 | int err = 0; |
231 | int harderr = 0; | |
232 | ||
36393395 DM |
233 | if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) |
234 | ipv4_sk_update_pmtu(skb, sk, info); | |
8d65b119 | 235 | else if (type == ICMP_REDIRECT) { |
55be7a9c | 236 | ipv4_sk_redirect(skb, sk); |
8d65b119 DJ |
237 | return; |
238 | } | |
36393395 | 239 | |
1da177e4 LT |
240 | /* 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; | |
1da177e4 LT |
263 | if (code == ICMP_FRAG_NEEDED) { |
264 | harderr = inet->pmtudisc != IP_PMTUDISC_DONT; | |
265 | err = EMSGSIZE; | |
75511449 ML |
266 | } else { |
267 | err = icmp_err_convert[code].errno; | |
268 | harderr = icmp_err_convert[code].fatal; | |
1da177e4 LT |
269 | } |
270 | } | |
271 | ||
272 | if (inet->recverr) { | |
b71d1d42 | 273 | const struct iphdr *iph = (const struct iphdr *)skb->data; |
1da177e4 LT |
274 | u8 *payload = skb->data + (iph->ihl << 2); |
275 | ||
276 | if (inet->hdrincl) | |
277 | payload = skb->data; | |
278 | ip_icmp_error(sk, skb, err, 0, info, payload); | |
279 | } | |
280 | ||
281 | if (inet->recverr || harderr) { | |
282 | sk->sk_err = err; | |
e3ae2365 | 283 | sk_error_report(sk); |
1da177e4 LT |
284 | } |
285 | } | |
286 | ||
7bc54c90 PE |
287 | void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) |
288 | { | |
289 | int hash; | |
290 | struct sock *raw_sk; | |
b71d1d42 | 291 | const struct iphdr *iph; |
be185884 | 292 | struct net *net; |
7bc54c90 | 293 | |
b673e4df | 294 | hash = protocol & (RAW_HTABLE_SIZE - 1); |
7bc54c90 | 295 | |
b673e4df PE |
296 | read_lock(&raw_v4_hashinfo.lock); |
297 | raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); | |
00db4124 | 298 | if (raw_sk) { |
67359930 DA |
299 | int dif = skb->dev->ifindex; |
300 | int sdif = inet_sdif(skb); | |
301 | ||
b71d1d42 | 302 | iph = (const struct iphdr *)skb->data; |
c346dca1 | 303 | net = dev_net(skb->dev); |
be185884 PE |
304 | |
305 | while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol, | |
306 | iph->daddr, iph->saddr, | |
67359930 | 307 | dif, sdif)) != NULL) { |
7bc54c90 PE |
308 | raw_err(raw_sk, skb, info); |
309 | raw_sk = sk_next(raw_sk); | |
b71d1d42 | 310 | iph = (const struct iphdr *)skb->data; |
7bc54c90 PE |
311 | } |
312 | } | |
b673e4df | 313 | read_unlock(&raw_v4_hashinfo.lock); |
7bc54c90 PE |
314 | } |
315 | ||
5e73ea1a | 316 | static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
317 | { |
318 | /* Charge it to the socket. */ | |
e905a9ed | 319 | |
fbf8866d | 320 | ipv4_pktinfo_prepare(sk, skb); |
d826eb14 | 321 | if (sock_queue_rcv_skb(sk, skb) < 0) { |
1da177e4 LT |
322 | kfree_skb(skb); |
323 | return NET_RX_DROP; | |
324 | } | |
325 | ||
326 | return NET_RX_SUCCESS; | |
327 | } | |
328 | ||
329 | int raw_rcv(struct sock *sk, struct sk_buff *skb) | |
330 | { | |
331 | if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { | |
33c732c3 | 332 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
333 | kfree_skb(skb); |
334 | return NET_RX_DROP; | |
335 | } | |
895b5c9f | 336 | nf_reset_ct(skb); |
1da177e4 | 337 | |
d56f90a7 | 338 | skb_push(skb, skb->data - skb_network_header(skb)); |
1da177e4 LT |
339 | |
340 | raw_rcv_skb(sk, skb); | |
341 | return 0; | |
342 | } | |
343 | ||
77968b78 | 344 | static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, |
7ae9abfd | 345 | struct msghdr *msg, size_t length, |
c14ac945 SHY |
346 | struct rtable **rtp, unsigned int flags, |
347 | const struct sockcm_cookie *sockc) | |
1da177e4 LT |
348 | { |
349 | struct inet_sock *inet = inet_sk(sk); | |
0388b004 | 350 | struct net *net = sock_net(sk); |
1da177e4 LT |
351 | struct iphdr *iph; |
352 | struct sk_buff *skb; | |
f844c74f | 353 | unsigned int iphlen; |
1da177e4 | 354 | int err; |
1789a640 | 355 | struct rtable *rt = *rtp; |
66088243 | 356 | int hlen, tlen; |
1da177e4 | 357 | |
d8d1f30b | 358 | if (length > rt->dst.dev->mtu) { |
77968b78 | 359 | ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, |
d8d1f30b | 360 | rt->dst.dev->mtu); |
1da177e4 LT |
361 | return -EMSGSIZE; |
362 | } | |
86f4c90a AP |
363 | if (length < sizeof(struct iphdr)) |
364 | return -EINVAL; | |
365 | ||
1da177e4 LT |
366 | if (flags&MSG_PROBE) |
367 | goto out; | |
368 | ||
66088243 HX |
369 | hlen = LL_RESERVED_SPACE(rt->dst.dev); |
370 | tlen = rt->dst.dev->needed_tailroom; | |
f5184d26 | 371 | skb = sock_alloc_send_skb(sk, |
66088243 | 372 | length + hlen + tlen + 15, |
f5184d26 | 373 | flags & MSG_DONTWAIT, &err); |
51456b29 | 374 | if (!skb) |
e905a9ed | 375 | goto error; |
66088243 | 376 | skb_reserve(skb, hlen); |
1da177e4 LT |
377 | |
378 | skb->priority = sk->sk_priority; | |
c6af0c22 | 379 | skb->mark = sockc->mark; |
bc969a97 | 380 | skb->tstamp = sockc->transmit_time; |
d8d1f30b | 381 | skb_dst_set(skb, &rt->dst); |
1789a640 | 382 | *rtp = NULL; |
1da177e4 | 383 | |
7e28ecc2 | 384 | skb_reset_network_header(skb); |
eddc9ec5 | 385 | iph = ip_hdr(skb); |
7e28ecc2 | 386 | skb_put(skb, length); |
1da177e4 LT |
387 | |
388 | skb->ip_summed = CHECKSUM_NONE; | |
389 | ||
8f932f76 | 390 | skb_setup_tx_timestamp(skb, sockc->tsflags); |
11878b40 | 391 | |
0dec879f JA |
392 | if (flags & MSG_CONFIRM) |
393 | skb_set_dst_pending_confirm(skb, 1); | |
394 | ||
b0e380b1 | 395 | skb->transport_header = skb->network_header; |
55888dfb | 396 | err = -EFAULT; |
21226abb | 397 | if (memcpy_from_msg(iph, msg, length)) |
55888dfb | 398 | goto error_free; |
1da177e4 | 399 | |
f844c74f | 400 | iphlen = iph->ihl * 4; |
55888dfb NH |
401 | |
402 | /* | |
403 | * We don't want to modify the ip header, but we do need to | |
404 | * be sure that it won't cause problems later along the network | |
405 | * stack. Specifically we want to make sure that iph->ihl is a | |
406 | * sane value. If ihl points beyond the length of the buffer passed | |
407 | * in, reject the frame as invalid | |
408 | */ | |
409 | err = -EINVAL; | |
410 | if (iphlen > length) | |
411 | goto error_free; | |
412 | ||
413 | if (iphlen >= sizeof(*iph)) { | |
1da177e4 | 414 | if (!iph->saddr) |
77968b78 | 415 | iph->saddr = fl4->saddr; |
1da177e4 LT |
416 | iph->check = 0; |
417 | iph->tot_len = htons(length); | |
418 | if (!iph->id) | |
b6a7719a | 419 | ip_select_ident(net, skb, NULL); |
1da177e4 LT |
420 | |
421 | iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); | |
027ac58e BCC |
422 | skb->transport_header += iphlen; |
423 | if (iph->protocol == IPPROTO_ICMP && | |
424 | length >= iphlen + sizeof(struct icmphdr)) | |
425 | icmp_out_count(net, ((struct icmphdr *) | |
426 | skb_transport_header(skb))->type); | |
1da177e4 LT |
427 | } |
428 | ||
29a26a56 EB |
429 | err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, |
430 | net, sk, skb, NULL, rt->dst.dev, | |
13206b6b | 431 | dst_output); |
1da177e4 | 432 | if (err > 0) |
6ce9e7b5 | 433 | err = net_xmit_errno(err); |
1da177e4 LT |
434 | if (err) |
435 | goto error; | |
436 | out: | |
437 | return 0; | |
438 | ||
55888dfb | 439 | error_free: |
1da177e4 LT |
440 | kfree_skb(skb); |
441 | error: | |
5e38e270 | 442 | IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); |
6ce9e7b5 ED |
443 | if (err == -ENOBUFS && !inet->recverr) |
444 | err = 0; | |
e905a9ed | 445 | return err; |
1da177e4 LT |
446 | } |
447 | ||
c008ba5b | 448 | static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4) |
1da177e4 | 449 | { |
32b5913a | 450 | int err; |
1da177e4 | 451 | |
32b5913a | 452 | if (fl4->flowi4_proto != IPPROTO_ICMP) |
a27b58fe | 453 | return 0; |
1da177e4 | 454 | |
32b5913a | 455 | /* We only need the first two bytes. */ |
c008ba5b HX |
456 | rfv->hlen = 2; |
457 | ||
b61e9dcc | 458 | err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen); |
32b5913a HX |
459 | if (err) |
460 | return err; | |
461 | ||
c008ba5b HX |
462 | fl4->fl4_icmp_type = rfv->hdr.icmph.type; |
463 | fl4->fl4_icmp_code = rfv->hdr.icmph.code; | |
32b5913a | 464 | |
a27b58fe | 465 | return 0; |
1da177e4 LT |
466 | } |
467 | ||
c008ba5b HX |
468 | static int raw_getfrag(void *from, char *to, int offset, int len, int odd, |
469 | struct sk_buff *skb) | |
470 | { | |
471 | struct raw_frag_vec *rfv = from; | |
472 | ||
473 | if (offset < rfv->hlen) { | |
474 | int copy = min(rfv->hlen - offset, len); | |
475 | ||
476 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
477 | memcpy(to, rfv->hdr.c + offset, copy); | |
478 | else | |
479 | skb->csum = csum_block_add( | |
480 | skb->csum, | |
481 | csum_partial_copy_nocheck(rfv->hdr.c + offset, | |
cc44c17b | 482 | to, copy), |
c008ba5b HX |
483 | odd); |
484 | ||
485 | odd = 0; | |
486 | offset += copy; | |
487 | to += copy; | |
488 | len -= copy; | |
489 | ||
490 | if (!len) | |
491 | return 0; | |
492 | } | |
493 | ||
494 | offset -= rfv->hlen; | |
495 | ||
f69e6d13 | 496 | return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb); |
c008ba5b HX |
497 | } |
498 | ||
1b784140 | 499 | static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) |
1da177e4 LT |
500 | { |
501 | struct inet_sock *inet = inet_sk(sk); | |
bb191c3e | 502 | struct net *net = sock_net(sk); |
1da177e4 LT |
503 | struct ipcm_cookie ipc; |
504 | struct rtable *rt = NULL; | |
77968b78 | 505 | struct flowi4 fl4; |
1da177e4 | 506 | int free = 0; |
3ca3c68e | 507 | __be32 daddr; |
c1d18f9f | 508 | __be32 saddr; |
1da177e4 LT |
509 | u8 tos; |
510 | int err; | |
f6d8bd05 | 511 | struct ip_options_data opt_copy; |
c008ba5b | 512 | struct raw_frag_vec rfv; |
8f659a03 | 513 | int hdrincl; |
1da177e4 LT |
514 | |
515 | err = -EMSGSIZE; | |
926d4b81 | 516 | if (len > 0xFFFF) |
1da177e4 LT |
517 | goto out; |
518 | ||
8f659a03 | 519 | /* hdrincl should be READ_ONCE(inet->hdrincl) |
20b50d79 NS |
520 | * but READ_ONCE() doesn't work with bit fields. |
521 | * Doing this indirectly yields the same result. | |
8f659a03 MG |
522 | */ |
523 | hdrincl = inet->hdrincl; | |
20b50d79 | 524 | hdrincl = READ_ONCE(hdrincl); |
1da177e4 LT |
525 | /* |
526 | * Check the flags. | |
527 | */ | |
528 | ||
529 | err = -EOPNOTSUPP; | |
530 | if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ | |
531 | goto out; /* compatibility */ | |
e905a9ed | 532 | |
1da177e4 | 533 | /* |
e905a9ed | 534 | * Get and verify the address. |
1da177e4 LT |
535 | */ |
536 | ||
537 | if (msg->msg_namelen) { | |
342dfc30 | 538 | DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name); |
1da177e4 LT |
539 | err = -EINVAL; |
540 | if (msg->msg_namelen < sizeof(*usin)) | |
541 | goto out; | |
542 | if (usin->sin_family != AF_INET) { | |
058bd4d2 JP |
543 | pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n", |
544 | __func__, current->comm); | |
1da177e4 LT |
545 | err = -EAFNOSUPPORT; |
546 | if (usin->sin_family) | |
547 | goto out; | |
548 | } | |
549 | daddr = usin->sin_addr.s_addr; | |
550 | /* ANK: I did not forget to get protocol from port field. | |
551 | * I just do not know, who uses this weirdness. | |
552 | * IP_HDRINCL is much more convenient. | |
553 | */ | |
554 | } else { | |
555 | err = -EDESTADDRREQ; | |
e905a9ed | 556 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 557 | goto out; |
c720c7e8 | 558 | daddr = inet->inet_daddr; |
1da177e4 LT |
559 | } |
560 | ||
35178206 | 561 | ipcm_init_sk(&ipc, inet); |
1da177e4 LT |
562 | |
563 | if (msg->msg_controllen) { | |
24025c46 | 564 | err = ip_cmsg_send(sk, msg, &ipc, false); |
91948309 ED |
565 | if (unlikely(err)) { |
566 | kfree(ipc.opt); | |
1da177e4 | 567 | goto out; |
91948309 | 568 | } |
1da177e4 LT |
569 | if (ipc.opt) |
570 | free = 1; | |
571 | } | |
572 | ||
573 | saddr = ipc.addr; | |
574 | ipc.addr = daddr; | |
575 | ||
f6d8bd05 ED |
576 | if (!ipc.opt) { |
577 | struct ip_options_rcu *inet_opt; | |
578 | ||
579 | rcu_read_lock(); | |
580 | inet_opt = rcu_dereference(inet->inet_opt); | |
581 | if (inet_opt) { | |
582 | memcpy(&opt_copy, inet_opt, | |
583 | sizeof(*inet_opt) + inet_opt->opt.optlen); | |
584 | ipc.opt = &opt_copy.opt; | |
585 | } | |
586 | rcu_read_unlock(); | |
587 | } | |
1da177e4 LT |
588 | |
589 | if (ipc.opt) { | |
590 | err = -EINVAL; | |
591 | /* Linux does not mangle headers on raw sockets, | |
592 | * so that IP options + IP_HDRINCL is non-sense. | |
593 | */ | |
8f659a03 | 594 | if (hdrincl) |
1da177e4 | 595 | goto done; |
f6d8bd05 | 596 | if (ipc.opt->opt.srr) { |
1da177e4 LT |
597 | if (!daddr) |
598 | goto done; | |
f6d8bd05 | 599 | daddr = ipc.opt->opt.faddr; |
1da177e4 LT |
600 | } |
601 | } | |
aa661581 | 602 | tos = get_rtconn_flags(&ipc, sk); |
1da177e4 LT |
603 | if (msg->msg_flags & MSG_DONTROUTE) |
604 | tos |= RTO_ONLINK; | |
605 | ||
f97c1e0c | 606 | if (ipv4_is_multicast(daddr)) { |
854da991 | 607 | if (!ipc.oif || netif_index_is_l3_master(sock_net(sk), ipc.oif)) |
1da177e4 LT |
608 | ipc.oif = inet->mc_index; |
609 | if (!saddr) | |
610 | saddr = inet->mc_addr; | |
9515a2e0 | 611 | } else if (!ipc.oif) { |
76e21053 | 612 | ipc.oif = inet->uc_index; |
9515a2e0 | 613 | } else if (ipv4_is_lbcast(daddr) && inet->uc_index) { |
645f0897 | 614 | /* oif is set, packet is to local broadcast |
9515a2e0 DA |
615 | * and uc_index is set. oif is most likely set |
616 | * by sk_bound_dev_if. If uc_index != oif check if the | |
617 | * oif is an L3 master and uc_index is an L3 slave. | |
618 | * If so, we want to allow the send using the uc_index. | |
619 | */ | |
620 | if (ipc.oif != inet->uc_index && | |
621 | ipc.oif == l3mdev_master_ifindex_by_index(sock_net(sk), | |
622 | inet->uc_index)) { | |
623 | ipc.oif = inet->uc_index; | |
624 | } | |
625 | } | |
1da177e4 | 626 | |
c6af0c22 | 627 | flowi4_init_output(&fl4, ipc.oif, ipc.sockc.mark, tos, |
77968b78 | 628 | RT_SCOPE_UNIVERSE, |
8f659a03 | 629 | hdrincl ? IPPROTO_RAW : sk->sk_protocol, |
0e0d44ab | 630 | inet_sk_flowi_flags(sk) | |
8f659a03 | 631 | (hdrincl ? FLOWI_FLAG_KNOWN_NH : 0), |
e2d118a1 | 632 | daddr, saddr, 0, 0, sk->sk_uid); |
ef164ae3 | 633 | |
8f659a03 | 634 | if (!hdrincl) { |
b61e9dcc | 635 | rfv.msg = msg; |
c008ba5b HX |
636 | rfv.hlen = 0; |
637 | ||
638 | err = raw_probe_proto_opt(&rfv, &fl4); | |
77968b78 | 639 | if (err) |
b23dd4fe | 640 | goto done; |
77968b78 DM |
641 | } |
642 | ||
3df98d79 | 643 | security_sk_classify_flow(sk, flowi4_to_flowi_common(&fl4)); |
bb191c3e | 644 | rt = ip_route_output_flow(net, &fl4, sk); |
77968b78 DM |
645 | if (IS_ERR(rt)) { |
646 | err = PTR_ERR(rt); | |
647 | rt = NULL; | |
648 | goto done; | |
1da177e4 | 649 | } |
1da177e4 LT |
650 | |
651 | err = -EACCES; | |
652 | if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST)) | |
653 | goto done; | |
654 | ||
655 | if (msg->msg_flags & MSG_CONFIRM) | |
656 | goto do_confirm; | |
657 | back_from_confirm: | |
658 | ||
8f659a03 | 659 | if (hdrincl) |
7ae9abfd | 660 | err = raw_send_hdrinc(sk, &fl4, msg, len, |
c14ac945 | 661 | &rt, msg->msg_flags, &ipc.sockc); |
e905a9ed | 662 | |
1da177e4 LT |
663 | else { |
664 | if (!ipc.addr) | |
77968b78 | 665 | ipc.addr = fl4.daddr; |
1da177e4 | 666 | lock_sock(sk); |
c008ba5b HX |
667 | err = ip_append_data(sk, &fl4, raw_getfrag, |
668 | &rfv, len, 0, | |
77968b78 | 669 | &ipc, &rt, msg->msg_flags); |
1da177e4 LT |
670 | if (err) |
671 | ip_flush_pending_frames(sk); | |
6ce9e7b5 | 672 | else if (!(msg->msg_flags & MSG_MORE)) { |
77968b78 | 673 | err = ip_push_pending_frames(sk, &fl4); |
6ce9e7b5 ED |
674 | if (err == -ENOBUFS && !inet->recverr) |
675 | err = 0; | |
676 | } | |
1da177e4 LT |
677 | release_sock(sk); |
678 | } | |
679 | done: | |
680 | if (free) | |
681 | kfree(ipc.opt); | |
682 | ip_rt_put(rt); | |
683 | ||
5418c692 JJ |
684 | out: |
685 | if (err < 0) | |
686 | return err; | |
687 | return len; | |
1da177e4 LT |
688 | |
689 | do_confirm: | |
0dec879f JA |
690 | if (msg->msg_flags & MSG_PROBE) |
691 | dst_confirm_neigh(&rt->dst, &fl4.daddr); | |
1da177e4 LT |
692 | if (!(msg->msg_flags & MSG_PROBE) || len) |
693 | goto back_from_confirm; | |
694 | err = 0; | |
695 | goto done; | |
696 | } | |
697 | ||
698 | static void raw_close(struct sock *sk, long timeout) | |
699 | { | |
e905a9ed | 700 | /* |
25985edc | 701 | * Raw sockets may have direct kernel references. Kill them. |
1da177e4 LT |
702 | */ |
703 | ip_ra_control(sk, 0, NULL); | |
704 | ||
705 | sk_common_release(sk); | |
706 | } | |
707 | ||
7d06b2e0 | 708 | static void raw_destroy(struct sock *sk) |
22dd4850 DL |
709 | { |
710 | lock_sock(sk); | |
711 | ip_flush_pending_frames(sk); | |
712 | release_sock(sk); | |
22dd4850 DL |
713 | } |
714 | ||
1da177e4 LT |
715 | /* This gets rid of all the nasties in af_inet. -DaveM */ |
716 | static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
717 | { | |
718 | struct inet_sock *inet = inet_sk(sk); | |
719 | struct sockaddr_in *addr = (struct sockaddr_in *) uaddr; | |
8ff978b8 | 720 | struct net *net = sock_net(sk); |
cd2c0f45 | 721 | u32 tb_id = RT_TABLE_LOCAL; |
1da177e4 LT |
722 | int ret = -EINVAL; |
723 | int chk_addr_ret; | |
724 | ||
153a0d18 | 725 | lock_sock(sk); |
1da177e4 LT |
726 | if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) |
727 | goto out; | |
cd2c0f45 DA |
728 | |
729 | if (sk->sk_bound_dev_if) | |
8ff978b8 RPB |
730 | tb_id = l3mdev_fib_table_by_index(net, |
731 | sk->sk_bound_dev_if) ? : tb_id; | |
cd2c0f45 | 732 | |
8ff978b8 | 733 | chk_addr_ret = inet_addr_type_table(net, addr->sin_addr.s_addr, tb_id); |
cd2c0f45 | 734 | |
1da177e4 | 735 | ret = -EADDRNOTAVAIL; |
8ff978b8 RPB |
736 | if (!inet_addr_valid_or_nonlocal(net, inet, addr->sin_addr.s_addr, |
737 | chk_addr_ret)) | |
1da177e4 | 738 | goto out; |
8ff978b8 | 739 | |
c720c7e8 | 740 | inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; |
1da177e4 | 741 | if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) |
c720c7e8 | 742 | inet->inet_saddr = 0; /* Use device */ |
1da177e4 LT |
743 | sk_dst_reset(sk); |
744 | ret = 0; | |
153a0d18 ED |
745 | out: |
746 | release_sock(sk); | |
747 | return ret; | |
1da177e4 LT |
748 | } |
749 | ||
750 | /* | |
751 | * This should be easy, if there is something there | |
752 | * we return it, otherwise we block. | |
753 | */ | |
754 | ||
1b784140 | 755 | static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
ec095263 | 756 | int flags, int *addr_len) |
1da177e4 LT |
757 | { |
758 | struct inet_sock *inet = inet_sk(sk); | |
759 | size_t copied = 0; | |
760 | int err = -EOPNOTSUPP; | |
342dfc30 | 761 | DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name); |
1da177e4 LT |
762 | struct sk_buff *skb; |
763 | ||
764 | if (flags & MSG_OOB) | |
765 | goto out; | |
766 | ||
1da177e4 | 767 | if (flags & MSG_ERRQUEUE) { |
85fbaa75 | 768 | err = ip_recv_error(sk, msg, len, addr_len); |
1da177e4 LT |
769 | goto out; |
770 | } | |
771 | ||
f4b41f06 | 772 | skb = skb_recv_datagram(sk, flags, &err); |
1da177e4 LT |
773 | if (!skb) |
774 | goto out; | |
775 | ||
776 | copied = skb->len; | |
777 | if (len < copied) { | |
778 | msg->msg_flags |= MSG_TRUNC; | |
779 | copied = len; | |
780 | } | |
781 | ||
51f3d02b | 782 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
783 | if (err) |
784 | goto done; | |
785 | ||
6fd1d51c | 786 | sock_recv_cmsgs(msg, sk, skb); |
1da177e4 LT |
787 | |
788 | /* Copy the address. */ | |
789 | if (sin) { | |
790 | sin->sin_family = AF_INET; | |
eddc9ec5 | 791 | sin->sin_addr.s_addr = ip_hdr(skb)->saddr; |
f59fc7f3 | 792 | sin->sin_port = 0; |
1da177e4 | 793 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); |
bceaa902 | 794 | *addr_len = sizeof(*sin); |
1da177e4 LT |
795 | } |
796 | if (inet->cmsg_flags) | |
797 | ip_cmsg_recv(msg, skb); | |
798 | if (flags & MSG_TRUNC) | |
799 | copied = skb->len; | |
800 | done: | |
801 | skb_free_datagram(sk, skb); | |
5418c692 JJ |
802 | out: |
803 | if (err) | |
804 | return err; | |
805 | return copied; | |
1da177e4 LT |
806 | } |
807 | ||
6897445f | 808 | static int raw_sk_init(struct sock *sk) |
1da177e4 LT |
809 | { |
810 | struct raw_sock *rp = raw_sk(sk); | |
811 | ||
c720c7e8 | 812 | if (inet_sk(sk)->inet_num == IPPROTO_ICMP) |
1da177e4 LT |
813 | memset(&rp->filter, 0, sizeof(rp->filter)); |
814 | return 0; | |
815 | } | |
816 | ||
a7b75c5a | 817 | static int raw_seticmpfilter(struct sock *sk, sockptr_t optval, int optlen) |
1da177e4 LT |
818 | { |
819 | if (optlen > sizeof(struct icmp_filter)) | |
820 | optlen = sizeof(struct icmp_filter); | |
a7b75c5a | 821 | if (copy_from_sockptr(&raw_sk(sk)->filter, optval, optlen)) |
1da177e4 LT |
822 | return -EFAULT; |
823 | return 0; | |
824 | } | |
825 | ||
826 | static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen) | |
827 | { | |
828 | int len, ret = -EFAULT; | |
829 | ||
830 | if (get_user(len, optlen)) | |
831 | goto out; | |
832 | ret = -EINVAL; | |
833 | if (len < 0) | |
834 | goto out; | |
835 | if (len > sizeof(struct icmp_filter)) | |
836 | len = sizeof(struct icmp_filter); | |
837 | ret = -EFAULT; | |
838 | if (put_user(len, optlen) || | |
839 | copy_to_user(optval, &raw_sk(sk)->filter, len)) | |
840 | goto out; | |
841 | ret = 0; | |
842 | out: return ret; | |
843 | } | |
844 | ||
3fdadf7d | 845 | static int do_raw_setsockopt(struct sock *sk, int level, int optname, |
a7b75c5a | 846 | sockptr_t optval, unsigned int optlen) |
1da177e4 | 847 | { |
1da177e4 | 848 | if (optname == ICMP_FILTER) { |
c720c7e8 | 849 | if (inet_sk(sk)->inet_num != IPPROTO_ICMP) |
1da177e4 LT |
850 | return -EOPNOTSUPP; |
851 | else | |
852 | return raw_seticmpfilter(sk, optval, optlen); | |
853 | } | |
854 | return -ENOPROTOOPT; | |
855 | } | |
856 | ||
3fdadf7d | 857 | static int raw_setsockopt(struct sock *sk, int level, int optname, |
a7b75c5a | 858 | sockptr_t optval, unsigned int optlen) |
1da177e4 LT |
859 | { |
860 | if (level != SOL_RAW) | |
3fdadf7d DM |
861 | return ip_setsockopt(sk, level, optname, optval, optlen); |
862 | return do_raw_setsockopt(sk, level, optname, optval, optlen); | |
863 | } | |
1da177e4 | 864 | |
3fdadf7d DM |
865 | static int do_raw_getsockopt(struct sock *sk, int level, int optname, |
866 | char __user *optval, int __user *optlen) | |
867 | { | |
1da177e4 | 868 | if (optname == ICMP_FILTER) { |
c720c7e8 | 869 | if (inet_sk(sk)->inet_num != IPPROTO_ICMP) |
1da177e4 LT |
870 | return -EOPNOTSUPP; |
871 | else | |
872 | return raw_geticmpfilter(sk, optval, optlen); | |
873 | } | |
874 | return -ENOPROTOOPT; | |
875 | } | |
876 | ||
3fdadf7d DM |
877 | static int raw_getsockopt(struct sock *sk, int level, int optname, |
878 | char __user *optval, int __user *optlen) | |
879 | { | |
880 | if (level != SOL_RAW) | |
881 | return ip_getsockopt(sk, level, optname, optval, optlen); | |
882 | return do_raw_getsockopt(sk, level, optname, optval, optlen); | |
883 | } | |
884 | ||
1da177e4 LT |
885 | static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) |
886 | { | |
887 | switch (cmd) { | |
4500ebf8 JP |
888 | case SIOCOUTQ: { |
889 | int amount = sk_wmem_alloc_get(sk); | |
31e6d363 | 890 | |
4500ebf8 JP |
891 | return put_user(amount, (int __user *)arg); |
892 | } | |
893 | case SIOCINQ: { | |
894 | struct sk_buff *skb; | |
895 | int amount = 0; | |
896 | ||
897 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
898 | skb = skb_peek(&sk->sk_receive_queue); | |
00db4124 | 899 | if (skb) |
4500ebf8 JP |
900 | amount = skb->len; |
901 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
902 | return put_user(amount, (int __user *)arg); | |
903 | } | |
1da177e4 | 904 | |
4500ebf8 | 905 | default: |
1da177e4 | 906 | #ifdef CONFIG_IP_MROUTE |
4500ebf8 | 907 | return ipmr_ioctl(sk, cmd, (void __user *)arg); |
1da177e4 | 908 | #else |
4500ebf8 | 909 | return -ENOIOCTLCMD; |
1da177e4 LT |
910 | #endif |
911 | } | |
912 | } | |
913 | ||
709b46e8 EB |
914 | #ifdef CONFIG_COMPAT |
915 | static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) | |
916 | { | |
917 | switch (cmd) { | |
918 | case SIOCOUTQ: | |
919 | case SIOCINQ: | |
920 | return -ENOIOCTLCMD; | |
921 | default: | |
922 | #ifdef CONFIG_IP_MROUTE | |
923 | return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg)); | |
924 | #else | |
925 | return -ENOIOCTLCMD; | |
926 | #endif | |
927 | } | |
928 | } | |
929 | #endif | |
930 | ||
432490f9 CG |
931 | int raw_abort(struct sock *sk, int err) |
932 | { | |
933 | lock_sock(sk); | |
934 | ||
935 | sk->sk_err = err; | |
e3ae2365 | 936 | sk_error_report(sk); |
3de864f8 | 937 | __udp_disconnect(sk, 0); |
432490f9 CG |
938 | |
939 | release_sock(sk); | |
940 | ||
941 | return 0; | |
942 | } | |
943 | EXPORT_SYMBOL_GPL(raw_abort); | |
944 | ||
1da177e4 | 945 | struct proto raw_prot = { |
543d9cfe ACM |
946 | .name = "RAW", |
947 | .owner = THIS_MODULE, | |
948 | .close = raw_close, | |
22dd4850 | 949 | .destroy = raw_destroy, |
543d9cfe | 950 | .connect = ip4_datagram_connect, |
286c72de | 951 | .disconnect = __udp_disconnect, |
543d9cfe | 952 | .ioctl = raw_ioctl, |
6897445f | 953 | .init = raw_sk_init, |
543d9cfe ACM |
954 | .setsockopt = raw_setsockopt, |
955 | .getsockopt = raw_getsockopt, | |
956 | .sendmsg = raw_sendmsg, | |
957 | .recvmsg = raw_recvmsg, | |
958 | .bind = raw_bind, | |
959 | .backlog_rcv = raw_rcv_skb, | |
8141ed9f | 960 | .release_cb = ip4_datagram_release_cb, |
fc8717ba PE |
961 | .hash = raw_hash_sk, |
962 | .unhash = raw_unhash_sk, | |
543d9cfe | 963 | .obj_size = sizeof(struct raw_sock), |
8c2bc895 DW |
964 | .useroffset = offsetof(struct raw_sock, filter), |
965 | .usersize = sizeof_field(struct raw_sock, filter), | |
fc8717ba | 966 | .h.raw_hash = &raw_v4_hashinfo, |
3fdadf7d | 967 | #ifdef CONFIG_COMPAT |
709b46e8 | 968 | .compat_ioctl = compat_raw_ioctl, |
3fdadf7d | 969 | #endif |
432490f9 | 970 | .diag_destroy = raw_abort, |
1da177e4 LT |
971 | }; |
972 | ||
973 | #ifdef CONFIG_PROC_FS | |
1da177e4 LT |
974 | static struct sock *raw_get_first(struct seq_file *seq) |
975 | { | |
976 | struct sock *sk; | |
359745d7 | 977 | struct raw_hashinfo *h = pde_data(file_inode(seq->file)); |
5a5f3a8d | 978 | struct raw_iter_state *state = raw_seq_private(seq); |
1da177e4 | 979 | |
b673e4df PE |
980 | for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; |
981 | ++state->bucket) { | |
93cb5a1f | 982 | sk_for_each(sk, &h->ht[state->bucket]) |
1218854a | 983 | if (sock_net(sk) == seq_file_net(seq)) |
1da177e4 LT |
984 | goto found; |
985 | } | |
986 | sk = NULL; | |
987 | found: | |
988 | return sk; | |
989 | } | |
990 | ||
991 | static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) | |
992 | { | |
359745d7 | 993 | struct raw_hashinfo *h = pde_data(file_inode(seq->file)); |
5a5f3a8d | 994 | struct raw_iter_state *state = raw_seq_private(seq); |
1da177e4 LT |
995 | |
996 | do { | |
997 | sk = sk_next(sk); | |
998 | try_again: | |
999 | ; | |
1218854a | 1000 | } while (sk && sock_net(sk) != seq_file_net(seq)); |
1da177e4 | 1001 | |
b673e4df | 1002 | if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { |
93cb5a1f | 1003 | sk = sk_head(&h->ht[state->bucket]); |
1da177e4 LT |
1004 | goto try_again; |
1005 | } | |
1006 | return sk; | |
1007 | } | |
1008 | ||
1009 | static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos) | |
1010 | { | |
1011 | struct sock *sk = raw_get_first(seq); | |
1012 | ||
1013 | if (sk) | |
1014 | while (pos && (sk = raw_get_next(seq, sk)) != NULL) | |
1015 | --pos; | |
1016 | return pos ? NULL : sk; | |
1017 | } | |
1018 | ||
42a73808 | 1019 | void *raw_seq_start(struct seq_file *seq, loff_t *pos) |
0d8a42c9 | 1020 | __acquires(&h->lock) |
1da177e4 | 1021 | { |
359745d7 | 1022 | struct raw_hashinfo *h = pde_data(file_inode(seq->file)); |
42a73808 | 1023 | |
93cb5a1f | 1024 | read_lock(&h->lock); |
1da177e4 LT |
1025 | return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
1026 | } | |
42a73808 | 1027 | EXPORT_SYMBOL_GPL(raw_seq_start); |
1da177e4 | 1028 | |
42a73808 | 1029 | void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
1da177e4 LT |
1030 | { |
1031 | struct sock *sk; | |
1032 | ||
1033 | if (v == SEQ_START_TOKEN) | |
1034 | sk = raw_get_first(seq); | |
1035 | else | |
1036 | sk = raw_get_next(seq, v); | |
1037 | ++*pos; | |
1038 | return sk; | |
1039 | } | |
42a73808 | 1040 | EXPORT_SYMBOL_GPL(raw_seq_next); |
1da177e4 | 1041 | |
42a73808 | 1042 | void raw_seq_stop(struct seq_file *seq, void *v) |
0d8a42c9 | 1043 | __releases(&h->lock) |
1da177e4 | 1044 | { |
359745d7 | 1045 | struct raw_hashinfo *h = pde_data(file_inode(seq->file)); |
42a73808 | 1046 | |
93cb5a1f | 1047 | read_unlock(&h->lock); |
1da177e4 | 1048 | } |
42a73808 | 1049 | EXPORT_SYMBOL_GPL(raw_seq_stop); |
1da177e4 | 1050 | |
8cd850ef | 1051 | static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1da177e4 LT |
1052 | { |
1053 | struct inet_sock *inet = inet_sk(sp); | |
c720c7e8 ED |
1054 | __be32 dest = inet->inet_daddr, |
1055 | src = inet->inet_rcv_saddr; | |
1da177e4 | 1056 | __u16 destp = 0, |
c720c7e8 | 1057 | srcp = inet->inet_num; |
1da177e4 | 1058 | |
8cd850ef | 1059 | seq_printf(seq, "%4d: %08X:%04X %08X:%04X" |
ea9a0379 | 1060 | " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n", |
e905a9ed | 1061 | i, src, srcp, dest, destp, sp->sk_state, |
31e6d363 ED |
1062 | sk_wmem_alloc_get(sp), |
1063 | sk_rmem_alloc_get(sp), | |
a7cb5a49 EB |
1064 | 0, 0L, 0, |
1065 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), | |
1066 | 0, sock_i_ino(sp), | |
41c6d650 | 1067 | refcount_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4 LT |
1068 | } |
1069 | ||
1070 | static int raw_seq_show(struct seq_file *seq, void *v) | |
1071 | { | |
1da177e4 | 1072 | if (v == SEQ_START_TOKEN) |
8cd850ef DL |
1073 | seq_printf(seq, " sl local_address rem_address st tx_queue " |
1074 | "rx_queue tr tm->when retrnsmt uid timeout " | |
cb61cb9b | 1075 | "inode ref pointer drops\n"); |
8cd850ef DL |
1076 | else |
1077 | raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); | |
1da177e4 LT |
1078 | return 0; |
1079 | } | |
1080 | ||
f690808e | 1081 | static const struct seq_operations raw_seq_ops = { |
1da177e4 LT |
1082 | .start = raw_seq_start, |
1083 | .next = raw_seq_next, | |
1084 | .stop = raw_seq_stop, | |
1085 | .show = raw_seq_show, | |
1086 | }; | |
1087 | ||
a308da16 | 1088 | static __net_init int raw_init_net(struct net *net) |
1da177e4 | 1089 | { |
c3506372 CH |
1090 | if (!proc_create_net_data("raw", 0444, net->proc_net, &raw_seq_ops, |
1091 | sizeof(struct raw_iter_state), &raw_v4_hashinfo)) | |
1da177e4 | 1092 | return -ENOMEM; |
a308da16 | 1093 | |
1da177e4 LT |
1094 | return 0; |
1095 | } | |
1096 | ||
a308da16 PE |
1097 | static __net_exit void raw_exit_net(struct net *net) |
1098 | { | |
ece31ffd | 1099 | remove_proc_entry("raw", net->proc_net); |
a308da16 PE |
1100 | } |
1101 | ||
1102 | static __net_initdata struct pernet_operations raw_net_ops = { | |
1103 | .init = raw_init_net, | |
1104 | .exit = raw_exit_net, | |
1105 | }; | |
1106 | ||
1107 | int __init raw_proc_init(void) | |
1108 | { | |
1109 | return register_pernet_subsys(&raw_net_ops); | |
1110 | } | |
1111 | ||
1da177e4 LT |
1112 | void __init raw_proc_exit(void) |
1113 | { | |
a308da16 | 1114 | unregister_pernet_subsys(&raw_net_ops); |
1da177e4 | 1115 | } |
86d1d8b7 | 1116 | #endif /* CONFIG_PROC_FS */ |
6897445f MM |
1117 | |
1118 | static void raw_sysctl_init_net(struct net *net) | |
1119 | { | |
1120 | #ifdef CONFIG_NET_L3_MASTER_DEV | |
1121 | net->ipv4.sysctl_raw_l3mdev_accept = 1; | |
1122 | #endif | |
1123 | } | |
1124 | ||
1125 | static int __net_init raw_sysctl_init(struct net *net) | |
1126 | { | |
1127 | raw_sysctl_init_net(net); | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static struct pernet_operations __net_initdata raw_sysctl_ops = { | |
1132 | .init = raw_sysctl_init, | |
1133 | }; | |
1134 | ||
1135 | void __init raw_init(void) | |
1136 | { | |
1137 | raw_sysctl_init_net(&init_net); | |
1138 | if (register_pernet_subsys(&raw_sysctl_ops)) | |
1139 | panic("RAW: failed to init sysctl parameters.\n"); | |
1140 | } |