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 | |
0daf07e5 | 88 | struct raw_hashinfo raw_v4_hashinfo; |
432490f9 | 89 | EXPORT_SYMBOL_GPL(raw_v4_hashinfo); |
1da177e4 | 90 | |
086c653f | 91 | int raw_hash_sk(struct sock *sk) |
1da177e4 | 92 | { |
fc8717ba | 93 | struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
0daf07e5 | 94 | struct hlist_nulls_head *hlist; |
1da177e4 | 95 | |
0daf07e5 | 96 | hlist = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)]; |
65b4c50b | 97 | |
af185d8c | 98 | spin_lock(&h->lock); |
f289c02b | 99 | __sk_nulls_add_node_rcu(sk, hlist); |
0daf07e5 | 100 | sock_set_flag(sk, SOCK_RCU_FREE); |
af185d8c | 101 | spin_unlock(&h->lock); |
b3cb764a | 102 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); |
086c653f CG |
103 | |
104 | return 0; | |
65b4c50b PE |
105 | } |
106 | EXPORT_SYMBOL_GPL(raw_hash_sk); | |
107 | ||
fc8717ba | 108 | void raw_unhash_sk(struct sock *sk) |
ab70768e | 109 | { |
fc8717ba PE |
110 | struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
111 | ||
af185d8c | 112 | spin_lock(&h->lock); |
0daf07e5 | 113 | if (__sk_nulls_del_node_init_rcu(sk)) |
c29a0bc4 | 114 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
af185d8c | 115 | spin_unlock(&h->lock); |
ab70768e PE |
116 | } |
117 | EXPORT_SYMBOL_GPL(raw_unhash_sk); | |
118 | ||
ba44f818 ED |
119 | bool raw_v4_match(struct net *net, struct sock *sk, unsigned short num, |
120 | __be32 raddr, __be32 laddr, int dif, int sdif) | |
1da177e4 | 121 | { |
ba44f818 ED |
122 | struct inet_sock *inet = inet_sk(sk); |
123 | ||
124 | if (net_eq(sock_net(sk), net) && inet->inet_num == num && | |
125 | !(inet->inet_daddr && inet->inet_daddr != raddr) && | |
126 | !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) && | |
127 | raw_sk_bound_dev_eq(net, sk->sk_bound_dev_if, dif, sdif)) | |
128 | return true; | |
129 | return false; | |
1da177e4 | 130 | } |
ba44f818 | 131 | EXPORT_SYMBOL_GPL(raw_v4_match); |
1da177e4 LT |
132 | |
133 | /* | |
134 | * 0 - deliver | |
135 | * 1 - block | |
136 | */ | |
ab43ed8b | 137 | static int icmp_filter(const struct sock *sk, const struct sk_buff *skb) |
1da177e4 | 138 | { |
ab43ed8b ED |
139 | struct icmphdr _hdr; |
140 | const struct icmphdr *hdr; | |
1da177e4 | 141 | |
ab43ed8b ED |
142 | hdr = skb_header_pointer(skb, skb_transport_offset(skb), |
143 | sizeof(_hdr), &_hdr); | |
144 | if (!hdr) | |
1da177e4 LT |
145 | return 1; |
146 | ||
ab43ed8b | 147 | if (hdr->type < 32) { |
1da177e4 LT |
148 | __u32 data = raw_sk(sk)->filter.data; |
149 | ||
ab43ed8b | 150 | return ((1U << hdr->type) & data) != 0; |
1da177e4 LT |
151 | } |
152 | ||
153 | /* Do not block unknown ICMP types */ | |
154 | return 0; | |
155 | } | |
156 | ||
157 | /* IP input processing comes here for RAW socket delivery. | |
158 | * Caller owns SKB, so we must make clones. | |
159 | * | |
160 | * RFC 1122: SHOULD pass TOS value up to the transport layer. | |
161 | * -> It does. And not only TOS, but all IP header. | |
162 | */ | |
b71d1d42 | 163 | static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash) |
1da177e4 | 164 | { |
ba44f818 | 165 | struct net *net = dev_net(skb->dev); |
0daf07e5 ED |
166 | struct hlist_nulls_head *hlist; |
167 | struct hlist_nulls_node *hnode; | |
67359930 | 168 | int sdif = inet_sdif(skb); |
19e4e768 | 169 | int dif = inet_iif(skb); |
d13964f4 | 170 | int delivered = 0; |
ba44f818 | 171 | struct sock *sk; |
1da177e4 | 172 | |
0daf07e5 ED |
173 | hlist = &raw_v4_hashinfo.ht[hash]; |
174 | rcu_read_lock(); | |
f289c02b | 175 | sk_nulls_for_each(sk, hnode, hlist) { |
ba44f818 ED |
176 | if (!raw_v4_match(net, sk, iph->protocol, |
177 | iph->saddr, iph->daddr, dif, sdif)) | |
178 | continue; | |
d13964f4 | 179 | delivered = 1; |
f5220d63 QA |
180 | if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) && |
181 | ip_mc_sf_allow(sk, iph->daddr, iph->saddr, | |
60d9b031 | 182 | skb->dev->ifindex, sdif)) { |
1da177e4 LT |
183 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
184 | ||
185 | /* Not releasing hash table! */ | |
186 | if (clone) | |
187 | raw_rcv(sk, clone); | |
188 | } | |
1da177e4 | 189 | } |
0daf07e5 | 190 | rcu_read_unlock(); |
d13964f4 | 191 | return delivered; |
1da177e4 LT |
192 | } |
193 | ||
7bc54c90 PE |
194 | int raw_local_deliver(struct sk_buff *skb, int protocol) |
195 | { | |
ba44f818 | 196 | int hash = protocol & (RAW_HTABLE_SIZE - 1); |
7bc54c90 | 197 | |
ba44f818 | 198 | return raw_v4_input(skb, ip_hdr(skb), hash); |
7bc54c90 PE |
199 | } |
200 | ||
201 | static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) | |
1da177e4 LT |
202 | { |
203 | struct inet_sock *inet = inet_sk(sk); | |
88c7664f ACM |
204 | const int type = icmp_hdr(skb)->type; |
205 | const int code = icmp_hdr(skb)->code; | |
1da177e4 LT |
206 | int err = 0; |
207 | int harderr = 0; | |
208 | ||
36393395 DM |
209 | if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) |
210 | ipv4_sk_update_pmtu(skb, sk, info); | |
8d65b119 | 211 | else if (type == ICMP_REDIRECT) { |
55be7a9c | 212 | ipv4_sk_redirect(skb, sk); |
8d65b119 DJ |
213 | return; |
214 | } | |
36393395 | 215 | |
1da177e4 LT |
216 | /* Report error on raw socket, if: |
217 | 1. User requested ip_recverr. | |
218 | 2. Socket is connected (otherwise the error indication | |
219 | is useless without ip_recverr and error is hard. | |
220 | */ | |
221 | if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED) | |
222 | return; | |
223 | ||
224 | switch (type) { | |
225 | default: | |
226 | case ICMP_TIME_EXCEEDED: | |
227 | err = EHOSTUNREACH; | |
228 | break; | |
229 | case ICMP_SOURCE_QUENCH: | |
230 | return; | |
231 | case ICMP_PARAMETERPROB: | |
232 | err = EPROTO; | |
233 | harderr = 1; | |
234 | break; | |
235 | case ICMP_DEST_UNREACH: | |
236 | err = EHOSTUNREACH; | |
237 | if (code > NR_ICMP_UNREACH) | |
238 | break; | |
1da177e4 LT |
239 | if (code == ICMP_FRAG_NEEDED) { |
240 | harderr = inet->pmtudisc != IP_PMTUDISC_DONT; | |
241 | err = EMSGSIZE; | |
75511449 ML |
242 | } else { |
243 | err = icmp_err_convert[code].errno; | |
244 | harderr = icmp_err_convert[code].fatal; | |
1da177e4 LT |
245 | } |
246 | } | |
247 | ||
248 | if (inet->recverr) { | |
b71d1d42 | 249 | const struct iphdr *iph = (const struct iphdr *)skb->data; |
1da177e4 LT |
250 | u8 *payload = skb->data + (iph->ihl << 2); |
251 | ||
252 | if (inet->hdrincl) | |
253 | payload = skb->data; | |
254 | ip_icmp_error(sk, skb, err, 0, info, payload); | |
255 | } | |
256 | ||
257 | if (inet->recverr || harderr) { | |
258 | sk->sk_err = err; | |
e3ae2365 | 259 | sk_error_report(sk); |
1da177e4 LT |
260 | } |
261 | } | |
262 | ||
7bc54c90 PE |
263 | void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) |
264 | { | |
5da39e31 | 265 | struct net *net = dev_net(skb->dev); |
0daf07e5 ED |
266 | struct hlist_nulls_head *hlist; |
267 | struct hlist_nulls_node *hnode; | |
ba44f818 ED |
268 | int dif = skb->dev->ifindex; |
269 | int sdif = inet_sdif(skb); | |
b71d1d42 | 270 | const struct iphdr *iph; |
ba44f818 ED |
271 | struct sock *sk; |
272 | int hash; | |
7bc54c90 | 273 | |
b673e4df | 274 | hash = protocol & (RAW_HTABLE_SIZE - 1); |
0daf07e5 | 275 | hlist = &raw_v4_hashinfo.ht[hash]; |
7bc54c90 | 276 | |
0daf07e5 | 277 | rcu_read_lock(); |
f289c02b | 278 | sk_nulls_for_each(sk, hnode, hlist) { |
b71d1d42 | 279 | iph = (const struct iphdr *)skb->data; |
ba44f818 | 280 | if (!raw_v4_match(net, sk, iph->protocol, |
97a4d46b | 281 | iph->daddr, iph->saddr, dif, sdif)) |
ba44f818 ED |
282 | continue; |
283 | raw_err(sk, skb, info); | |
7bc54c90 | 284 | } |
0daf07e5 | 285 | rcu_read_unlock(); |
7bc54c90 PE |
286 | } |
287 | ||
5e73ea1a | 288 | static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
289 | { |
290 | /* Charge it to the socket. */ | |
e905a9ed | 291 | |
fbf8866d | 292 | ipv4_pktinfo_prepare(sk, skb); |
d826eb14 | 293 | if (sock_queue_rcv_skb(sk, skb) < 0) { |
1da177e4 LT |
294 | kfree_skb(skb); |
295 | return NET_RX_DROP; | |
296 | } | |
297 | ||
298 | return NET_RX_SUCCESS; | |
299 | } | |
300 | ||
301 | int raw_rcv(struct sock *sk, struct sk_buff *skb) | |
302 | { | |
303 | if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { | |
33c732c3 | 304 | atomic_inc(&sk->sk_drops); |
1da177e4 LT |
305 | kfree_skb(skb); |
306 | return NET_RX_DROP; | |
307 | } | |
895b5c9f | 308 | nf_reset_ct(skb); |
1da177e4 | 309 | |
d56f90a7 | 310 | skb_push(skb, skb->data - skb_network_header(skb)); |
1da177e4 LT |
311 | |
312 | raw_rcv_skb(sk, skb); | |
313 | return 0; | |
314 | } | |
315 | ||
77968b78 | 316 | static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, |
7ae9abfd | 317 | struct msghdr *msg, size_t length, |
c14ac945 SHY |
318 | struct rtable **rtp, unsigned int flags, |
319 | const struct sockcm_cookie *sockc) | |
1da177e4 LT |
320 | { |
321 | struct inet_sock *inet = inet_sk(sk); | |
0388b004 | 322 | struct net *net = sock_net(sk); |
1da177e4 LT |
323 | struct iphdr *iph; |
324 | struct sk_buff *skb; | |
f844c74f | 325 | unsigned int iphlen; |
1da177e4 | 326 | int err; |
1789a640 | 327 | struct rtable *rt = *rtp; |
66088243 | 328 | int hlen, tlen; |
1da177e4 | 329 | |
d8d1f30b | 330 | if (length > rt->dst.dev->mtu) { |
77968b78 | 331 | ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, |
d8d1f30b | 332 | rt->dst.dev->mtu); |
1da177e4 LT |
333 | return -EMSGSIZE; |
334 | } | |
86f4c90a AP |
335 | if (length < sizeof(struct iphdr)) |
336 | return -EINVAL; | |
337 | ||
1da177e4 LT |
338 | if (flags&MSG_PROBE) |
339 | goto out; | |
340 | ||
66088243 HX |
341 | hlen = LL_RESERVED_SPACE(rt->dst.dev); |
342 | tlen = rt->dst.dev->needed_tailroom; | |
f5184d26 | 343 | skb = sock_alloc_send_skb(sk, |
66088243 | 344 | length + hlen + tlen + 15, |
f5184d26 | 345 | flags & MSG_DONTWAIT, &err); |
51456b29 | 346 | if (!skb) |
e905a9ed | 347 | goto error; |
66088243 | 348 | skb_reserve(skb, hlen); |
1da177e4 LT |
349 | |
350 | skb->priority = sk->sk_priority; | |
c6af0c22 | 351 | skb->mark = sockc->mark; |
bc969a97 | 352 | skb->tstamp = sockc->transmit_time; |
d8d1f30b | 353 | skb_dst_set(skb, &rt->dst); |
1789a640 | 354 | *rtp = NULL; |
1da177e4 | 355 | |
7e28ecc2 | 356 | skb_reset_network_header(skb); |
eddc9ec5 | 357 | iph = ip_hdr(skb); |
7e28ecc2 | 358 | skb_put(skb, length); |
1da177e4 LT |
359 | |
360 | skb->ip_summed = CHECKSUM_NONE; | |
361 | ||
8f932f76 | 362 | skb_setup_tx_timestamp(skb, sockc->tsflags); |
11878b40 | 363 | |
0dec879f JA |
364 | if (flags & MSG_CONFIRM) |
365 | skb_set_dst_pending_confirm(skb, 1); | |
366 | ||
b0e380b1 | 367 | skb->transport_header = skb->network_header; |
55888dfb | 368 | err = -EFAULT; |
21226abb | 369 | if (memcpy_from_msg(iph, msg, length)) |
55888dfb | 370 | goto error_free; |
1da177e4 | 371 | |
f844c74f | 372 | iphlen = iph->ihl * 4; |
55888dfb NH |
373 | |
374 | /* | |
375 | * We don't want to modify the ip header, but we do need to | |
376 | * be sure that it won't cause problems later along the network | |
377 | * stack. Specifically we want to make sure that iph->ihl is a | |
378 | * sane value. If ihl points beyond the length of the buffer passed | |
379 | * in, reject the frame as invalid | |
380 | */ | |
381 | err = -EINVAL; | |
382 | if (iphlen > length) | |
383 | goto error_free; | |
384 | ||
385 | if (iphlen >= sizeof(*iph)) { | |
1da177e4 | 386 | if (!iph->saddr) |
77968b78 | 387 | iph->saddr = fl4->saddr; |
1da177e4 LT |
388 | iph->check = 0; |
389 | iph->tot_len = htons(length); | |
390 | if (!iph->id) | |
b6a7719a | 391 | ip_select_ident(net, skb, NULL); |
1da177e4 LT |
392 | |
393 | iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); | |
027ac58e BCC |
394 | skb->transport_header += iphlen; |
395 | if (iph->protocol == IPPROTO_ICMP && | |
396 | length >= iphlen + sizeof(struct icmphdr)) | |
397 | icmp_out_count(net, ((struct icmphdr *) | |
398 | skb_transport_header(skb))->type); | |
1da177e4 LT |
399 | } |
400 | ||
29a26a56 EB |
401 | err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, |
402 | net, sk, skb, NULL, rt->dst.dev, | |
13206b6b | 403 | dst_output); |
1da177e4 | 404 | if (err > 0) |
6ce9e7b5 | 405 | err = net_xmit_errno(err); |
1da177e4 LT |
406 | if (err) |
407 | goto error; | |
408 | out: | |
409 | return 0; | |
410 | ||
55888dfb | 411 | error_free: |
1da177e4 LT |
412 | kfree_skb(skb); |
413 | error: | |
5e38e270 | 414 | IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); |
6ce9e7b5 ED |
415 | if (err == -ENOBUFS && !inet->recverr) |
416 | err = 0; | |
e905a9ed | 417 | return err; |
1da177e4 LT |
418 | } |
419 | ||
c008ba5b | 420 | static int raw_probe_proto_opt(struct raw_frag_vec *rfv, struct flowi4 *fl4) |
1da177e4 | 421 | { |
32b5913a | 422 | int err; |
1da177e4 | 423 | |
32b5913a | 424 | if (fl4->flowi4_proto != IPPROTO_ICMP) |
a27b58fe | 425 | return 0; |
1da177e4 | 426 | |
32b5913a | 427 | /* We only need the first two bytes. */ |
c008ba5b HX |
428 | rfv->hlen = 2; |
429 | ||
b61e9dcc | 430 | err = memcpy_from_msg(rfv->hdr.c, rfv->msg, rfv->hlen); |
32b5913a HX |
431 | if (err) |
432 | return err; | |
433 | ||
c008ba5b HX |
434 | fl4->fl4_icmp_type = rfv->hdr.icmph.type; |
435 | fl4->fl4_icmp_code = rfv->hdr.icmph.code; | |
32b5913a | 436 | |
a27b58fe | 437 | return 0; |
1da177e4 LT |
438 | } |
439 | ||
c008ba5b HX |
440 | static int raw_getfrag(void *from, char *to, int offset, int len, int odd, |
441 | struct sk_buff *skb) | |
442 | { | |
443 | struct raw_frag_vec *rfv = from; | |
444 | ||
445 | if (offset < rfv->hlen) { | |
446 | int copy = min(rfv->hlen - offset, len); | |
447 | ||
448 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
449 | memcpy(to, rfv->hdr.c + offset, copy); | |
450 | else | |
451 | skb->csum = csum_block_add( | |
452 | skb->csum, | |
453 | csum_partial_copy_nocheck(rfv->hdr.c + offset, | |
cc44c17b | 454 | to, copy), |
c008ba5b HX |
455 | odd); |
456 | ||
457 | odd = 0; | |
458 | offset += copy; | |
459 | to += copy; | |
460 | len -= copy; | |
461 | ||
462 | if (!len) | |
463 | return 0; | |
464 | } | |
465 | ||
466 | offset -= rfv->hlen; | |
467 | ||
f69e6d13 | 468 | return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb); |
c008ba5b HX |
469 | } |
470 | ||
1b784140 | 471 | static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) |
1da177e4 LT |
472 | { |
473 | struct inet_sock *inet = inet_sk(sk); | |
bb191c3e | 474 | struct net *net = sock_net(sk); |
1da177e4 LT |
475 | struct ipcm_cookie ipc; |
476 | struct rtable *rt = NULL; | |
77968b78 | 477 | struct flowi4 fl4; |
1da177e4 | 478 | int free = 0; |
3ca3c68e | 479 | __be32 daddr; |
c1d18f9f | 480 | __be32 saddr; |
1da177e4 LT |
481 | u8 tos; |
482 | int err; | |
f6d8bd05 | 483 | struct ip_options_data opt_copy; |
c008ba5b | 484 | struct raw_frag_vec rfv; |
8f659a03 | 485 | int hdrincl; |
1da177e4 LT |
486 | |
487 | err = -EMSGSIZE; | |
926d4b81 | 488 | if (len > 0xFFFF) |
1da177e4 LT |
489 | goto out; |
490 | ||
8f659a03 | 491 | /* hdrincl should be READ_ONCE(inet->hdrincl) |
20b50d79 NS |
492 | * but READ_ONCE() doesn't work with bit fields. |
493 | * Doing this indirectly yields the same result. | |
8f659a03 MG |
494 | */ |
495 | hdrincl = inet->hdrincl; | |
20b50d79 | 496 | hdrincl = READ_ONCE(hdrincl); |
1da177e4 LT |
497 | /* |
498 | * Check the flags. | |
499 | */ | |
500 | ||
501 | err = -EOPNOTSUPP; | |
502 | if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ | |
503 | goto out; /* compatibility */ | |
e905a9ed | 504 | |
1da177e4 | 505 | /* |
e905a9ed | 506 | * Get and verify the address. |
1da177e4 LT |
507 | */ |
508 | ||
509 | if (msg->msg_namelen) { | |
342dfc30 | 510 | DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name); |
1da177e4 LT |
511 | err = -EINVAL; |
512 | if (msg->msg_namelen < sizeof(*usin)) | |
513 | goto out; | |
514 | if (usin->sin_family != AF_INET) { | |
058bd4d2 JP |
515 | pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n", |
516 | __func__, current->comm); | |
1da177e4 LT |
517 | err = -EAFNOSUPPORT; |
518 | if (usin->sin_family) | |
519 | goto out; | |
520 | } | |
521 | daddr = usin->sin_addr.s_addr; | |
522 | /* ANK: I did not forget to get protocol from port field. | |
523 | * I just do not know, who uses this weirdness. | |
524 | * IP_HDRINCL is much more convenient. | |
525 | */ | |
526 | } else { | |
527 | err = -EDESTADDRREQ; | |
e905a9ed | 528 | if (sk->sk_state != TCP_ESTABLISHED) |
1da177e4 | 529 | goto out; |
c720c7e8 | 530 | daddr = inet->inet_daddr; |
1da177e4 LT |
531 | } |
532 | ||
35178206 | 533 | ipcm_init_sk(&ipc, inet); |
1da177e4 LT |
534 | |
535 | if (msg->msg_controllen) { | |
24025c46 | 536 | err = ip_cmsg_send(sk, msg, &ipc, false); |
91948309 ED |
537 | if (unlikely(err)) { |
538 | kfree(ipc.opt); | |
1da177e4 | 539 | goto out; |
91948309 | 540 | } |
1da177e4 LT |
541 | if (ipc.opt) |
542 | free = 1; | |
543 | } | |
544 | ||
545 | saddr = ipc.addr; | |
546 | ipc.addr = daddr; | |
547 | ||
f6d8bd05 ED |
548 | if (!ipc.opt) { |
549 | struct ip_options_rcu *inet_opt; | |
550 | ||
551 | rcu_read_lock(); | |
552 | inet_opt = rcu_dereference(inet->inet_opt); | |
553 | if (inet_opt) { | |
554 | memcpy(&opt_copy, inet_opt, | |
555 | sizeof(*inet_opt) + inet_opt->opt.optlen); | |
556 | ipc.opt = &opt_copy.opt; | |
557 | } | |
558 | rcu_read_unlock(); | |
559 | } | |
1da177e4 LT |
560 | |
561 | if (ipc.opt) { | |
562 | err = -EINVAL; | |
563 | /* Linux does not mangle headers on raw sockets, | |
564 | * so that IP options + IP_HDRINCL is non-sense. | |
565 | */ | |
8f659a03 | 566 | if (hdrincl) |
1da177e4 | 567 | goto done; |
f6d8bd05 | 568 | if (ipc.opt->opt.srr) { |
1da177e4 LT |
569 | if (!daddr) |
570 | goto done; | |
f6d8bd05 | 571 | daddr = ipc.opt->opt.faddr; |
1da177e4 LT |
572 | } |
573 | } | |
aa661581 | 574 | tos = get_rtconn_flags(&ipc, sk); |
1da177e4 LT |
575 | if (msg->msg_flags & MSG_DONTROUTE) |
576 | tos |= RTO_ONLINK; | |
577 | ||
f97c1e0c | 578 | if (ipv4_is_multicast(daddr)) { |
854da991 | 579 | if (!ipc.oif || netif_index_is_l3_master(sock_net(sk), ipc.oif)) |
1da177e4 LT |
580 | ipc.oif = inet->mc_index; |
581 | if (!saddr) | |
582 | saddr = inet->mc_addr; | |
9515a2e0 | 583 | } else if (!ipc.oif) { |
76e21053 | 584 | ipc.oif = inet->uc_index; |
9515a2e0 | 585 | } else if (ipv4_is_lbcast(daddr) && inet->uc_index) { |
645f0897 | 586 | /* oif is set, packet is to local broadcast |
9515a2e0 DA |
587 | * and uc_index is set. oif is most likely set |
588 | * by sk_bound_dev_if. If uc_index != oif check if the | |
589 | * oif is an L3 master and uc_index is an L3 slave. | |
590 | * If so, we want to allow the send using the uc_index. | |
591 | */ | |
592 | if (ipc.oif != inet->uc_index && | |
593 | ipc.oif == l3mdev_master_ifindex_by_index(sock_net(sk), | |
594 | inet->uc_index)) { | |
595 | ipc.oif = inet->uc_index; | |
596 | } | |
597 | } | |
1da177e4 | 598 | |
c6af0c22 | 599 | flowi4_init_output(&fl4, ipc.oif, ipc.sockc.mark, tos, |
77968b78 | 600 | RT_SCOPE_UNIVERSE, |
8f659a03 | 601 | hdrincl ? IPPROTO_RAW : sk->sk_protocol, |
0e0d44ab | 602 | inet_sk_flowi_flags(sk) | |
8f659a03 | 603 | (hdrincl ? FLOWI_FLAG_KNOWN_NH : 0), |
e2d118a1 | 604 | daddr, saddr, 0, 0, sk->sk_uid); |
ef164ae3 | 605 | |
8f659a03 | 606 | if (!hdrincl) { |
b61e9dcc | 607 | rfv.msg = msg; |
c008ba5b HX |
608 | rfv.hlen = 0; |
609 | ||
610 | err = raw_probe_proto_opt(&rfv, &fl4); | |
77968b78 | 611 | if (err) |
b23dd4fe | 612 | goto done; |
77968b78 DM |
613 | } |
614 | ||
3df98d79 | 615 | security_sk_classify_flow(sk, flowi4_to_flowi_common(&fl4)); |
bb191c3e | 616 | rt = ip_route_output_flow(net, &fl4, sk); |
77968b78 DM |
617 | if (IS_ERR(rt)) { |
618 | err = PTR_ERR(rt); | |
619 | rt = NULL; | |
620 | goto done; | |
1da177e4 | 621 | } |
1da177e4 LT |
622 | |
623 | err = -EACCES; | |
624 | if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST)) | |
625 | goto done; | |
626 | ||
627 | if (msg->msg_flags & MSG_CONFIRM) | |
628 | goto do_confirm; | |
629 | back_from_confirm: | |
630 | ||
8f659a03 | 631 | if (hdrincl) |
7ae9abfd | 632 | err = raw_send_hdrinc(sk, &fl4, msg, len, |
c14ac945 | 633 | &rt, msg->msg_flags, &ipc.sockc); |
e905a9ed | 634 | |
1da177e4 LT |
635 | else { |
636 | if (!ipc.addr) | |
77968b78 | 637 | ipc.addr = fl4.daddr; |
1da177e4 | 638 | lock_sock(sk); |
c008ba5b HX |
639 | err = ip_append_data(sk, &fl4, raw_getfrag, |
640 | &rfv, len, 0, | |
77968b78 | 641 | &ipc, &rt, msg->msg_flags); |
1da177e4 LT |
642 | if (err) |
643 | ip_flush_pending_frames(sk); | |
6ce9e7b5 | 644 | else if (!(msg->msg_flags & MSG_MORE)) { |
77968b78 | 645 | err = ip_push_pending_frames(sk, &fl4); |
6ce9e7b5 ED |
646 | if (err == -ENOBUFS && !inet->recverr) |
647 | err = 0; | |
648 | } | |
1da177e4 LT |
649 | release_sock(sk); |
650 | } | |
651 | done: | |
652 | if (free) | |
653 | kfree(ipc.opt); | |
654 | ip_rt_put(rt); | |
655 | ||
5418c692 JJ |
656 | out: |
657 | if (err < 0) | |
658 | return err; | |
659 | return len; | |
1da177e4 LT |
660 | |
661 | do_confirm: | |
0dec879f JA |
662 | if (msg->msg_flags & MSG_PROBE) |
663 | dst_confirm_neigh(&rt->dst, &fl4.daddr); | |
1da177e4 LT |
664 | if (!(msg->msg_flags & MSG_PROBE) || len) |
665 | goto back_from_confirm; | |
666 | err = 0; | |
667 | goto done; | |
668 | } | |
669 | ||
670 | static void raw_close(struct sock *sk, long timeout) | |
671 | { | |
e905a9ed | 672 | /* |
25985edc | 673 | * Raw sockets may have direct kernel references. Kill them. |
1da177e4 LT |
674 | */ |
675 | ip_ra_control(sk, 0, NULL); | |
676 | ||
677 | sk_common_release(sk); | |
678 | } | |
679 | ||
7d06b2e0 | 680 | static void raw_destroy(struct sock *sk) |
22dd4850 DL |
681 | { |
682 | lock_sock(sk); | |
683 | ip_flush_pending_frames(sk); | |
684 | release_sock(sk); | |
22dd4850 DL |
685 | } |
686 | ||
1da177e4 LT |
687 | /* This gets rid of all the nasties in af_inet. -DaveM */ |
688 | static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
689 | { | |
690 | struct inet_sock *inet = inet_sk(sk); | |
691 | struct sockaddr_in *addr = (struct sockaddr_in *) uaddr; | |
8ff978b8 | 692 | struct net *net = sock_net(sk); |
cd2c0f45 | 693 | u32 tb_id = RT_TABLE_LOCAL; |
1da177e4 LT |
694 | int ret = -EINVAL; |
695 | int chk_addr_ret; | |
696 | ||
153a0d18 | 697 | lock_sock(sk); |
1da177e4 LT |
698 | if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) |
699 | goto out; | |
cd2c0f45 DA |
700 | |
701 | if (sk->sk_bound_dev_if) | |
8ff978b8 RPB |
702 | tb_id = l3mdev_fib_table_by_index(net, |
703 | sk->sk_bound_dev_if) ? : tb_id; | |
cd2c0f45 | 704 | |
8ff978b8 | 705 | chk_addr_ret = inet_addr_type_table(net, addr->sin_addr.s_addr, tb_id); |
cd2c0f45 | 706 | |
1da177e4 | 707 | ret = -EADDRNOTAVAIL; |
8ff978b8 RPB |
708 | if (!inet_addr_valid_or_nonlocal(net, inet, addr->sin_addr.s_addr, |
709 | chk_addr_ret)) | |
1da177e4 | 710 | goto out; |
8ff978b8 | 711 | |
c720c7e8 | 712 | inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; |
1da177e4 | 713 | if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) |
c720c7e8 | 714 | inet->inet_saddr = 0; /* Use device */ |
1da177e4 LT |
715 | sk_dst_reset(sk); |
716 | ret = 0; | |
153a0d18 ED |
717 | out: |
718 | release_sock(sk); | |
719 | return ret; | |
1da177e4 LT |
720 | } |
721 | ||
722 | /* | |
723 | * This should be easy, if there is something there | |
724 | * we return it, otherwise we block. | |
725 | */ | |
726 | ||
1b784140 | 727 | static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
ec095263 | 728 | int flags, int *addr_len) |
1da177e4 LT |
729 | { |
730 | struct inet_sock *inet = inet_sk(sk); | |
731 | size_t copied = 0; | |
732 | int err = -EOPNOTSUPP; | |
342dfc30 | 733 | DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name); |
1da177e4 LT |
734 | struct sk_buff *skb; |
735 | ||
736 | if (flags & MSG_OOB) | |
737 | goto out; | |
738 | ||
1da177e4 | 739 | if (flags & MSG_ERRQUEUE) { |
85fbaa75 | 740 | err = ip_recv_error(sk, msg, len, addr_len); |
1da177e4 LT |
741 | goto out; |
742 | } | |
743 | ||
f4b41f06 | 744 | skb = skb_recv_datagram(sk, flags, &err); |
1da177e4 LT |
745 | if (!skb) |
746 | goto out; | |
747 | ||
748 | copied = skb->len; | |
749 | if (len < copied) { | |
750 | msg->msg_flags |= MSG_TRUNC; | |
751 | copied = len; | |
752 | } | |
753 | ||
51f3d02b | 754 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 LT |
755 | if (err) |
756 | goto done; | |
757 | ||
6fd1d51c | 758 | sock_recv_cmsgs(msg, sk, skb); |
1da177e4 LT |
759 | |
760 | /* Copy the address. */ | |
761 | if (sin) { | |
762 | sin->sin_family = AF_INET; | |
eddc9ec5 | 763 | sin->sin_addr.s_addr = ip_hdr(skb)->saddr; |
f59fc7f3 | 764 | sin->sin_port = 0; |
1da177e4 | 765 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); |
bceaa902 | 766 | *addr_len = sizeof(*sin); |
1da177e4 LT |
767 | } |
768 | if (inet->cmsg_flags) | |
769 | ip_cmsg_recv(msg, skb); | |
770 | if (flags & MSG_TRUNC) | |
771 | copied = skb->len; | |
772 | done: | |
773 | skb_free_datagram(sk, skb); | |
5418c692 JJ |
774 | out: |
775 | if (err) | |
776 | return err; | |
777 | return copied; | |
1da177e4 LT |
778 | } |
779 | ||
6897445f | 780 | static int raw_sk_init(struct sock *sk) |
1da177e4 LT |
781 | { |
782 | struct raw_sock *rp = raw_sk(sk); | |
783 | ||
c720c7e8 | 784 | if (inet_sk(sk)->inet_num == IPPROTO_ICMP) |
1da177e4 LT |
785 | memset(&rp->filter, 0, sizeof(rp->filter)); |
786 | return 0; | |
787 | } | |
788 | ||
a7b75c5a | 789 | static int raw_seticmpfilter(struct sock *sk, sockptr_t optval, int optlen) |
1da177e4 LT |
790 | { |
791 | if (optlen > sizeof(struct icmp_filter)) | |
792 | optlen = sizeof(struct icmp_filter); | |
a7b75c5a | 793 | if (copy_from_sockptr(&raw_sk(sk)->filter, optval, optlen)) |
1da177e4 LT |
794 | return -EFAULT; |
795 | return 0; | |
796 | } | |
797 | ||
798 | static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen) | |
799 | { | |
800 | int len, ret = -EFAULT; | |
801 | ||
802 | if (get_user(len, optlen)) | |
803 | goto out; | |
804 | ret = -EINVAL; | |
805 | if (len < 0) | |
806 | goto out; | |
807 | if (len > sizeof(struct icmp_filter)) | |
808 | len = sizeof(struct icmp_filter); | |
809 | ret = -EFAULT; | |
810 | if (put_user(len, optlen) || | |
811 | copy_to_user(optval, &raw_sk(sk)->filter, len)) | |
812 | goto out; | |
813 | ret = 0; | |
814 | out: return ret; | |
815 | } | |
816 | ||
3fdadf7d | 817 | static int do_raw_setsockopt(struct sock *sk, int level, int optname, |
a7b75c5a | 818 | sockptr_t optval, unsigned int optlen) |
1da177e4 | 819 | { |
1da177e4 | 820 | if (optname == ICMP_FILTER) { |
c720c7e8 | 821 | if (inet_sk(sk)->inet_num != IPPROTO_ICMP) |
1da177e4 LT |
822 | return -EOPNOTSUPP; |
823 | else | |
824 | return raw_seticmpfilter(sk, optval, optlen); | |
825 | } | |
826 | return -ENOPROTOOPT; | |
827 | } | |
828 | ||
3fdadf7d | 829 | static int raw_setsockopt(struct sock *sk, int level, int optname, |
a7b75c5a | 830 | sockptr_t optval, unsigned int optlen) |
1da177e4 LT |
831 | { |
832 | if (level != SOL_RAW) | |
3fdadf7d DM |
833 | return ip_setsockopt(sk, level, optname, optval, optlen); |
834 | return do_raw_setsockopt(sk, level, optname, optval, optlen); | |
835 | } | |
1da177e4 | 836 | |
3fdadf7d DM |
837 | static int do_raw_getsockopt(struct sock *sk, int level, int optname, |
838 | char __user *optval, int __user *optlen) | |
839 | { | |
1da177e4 | 840 | if (optname == ICMP_FILTER) { |
c720c7e8 | 841 | if (inet_sk(sk)->inet_num != IPPROTO_ICMP) |
1da177e4 LT |
842 | return -EOPNOTSUPP; |
843 | else | |
844 | return raw_geticmpfilter(sk, optval, optlen); | |
845 | } | |
846 | return -ENOPROTOOPT; | |
847 | } | |
848 | ||
3fdadf7d DM |
849 | static int raw_getsockopt(struct sock *sk, int level, int optname, |
850 | char __user *optval, int __user *optlen) | |
851 | { | |
852 | if (level != SOL_RAW) | |
853 | return ip_getsockopt(sk, level, optname, optval, optlen); | |
854 | return do_raw_getsockopt(sk, level, optname, optval, optlen); | |
855 | } | |
856 | ||
1da177e4 LT |
857 | static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) |
858 | { | |
859 | switch (cmd) { | |
4500ebf8 JP |
860 | case SIOCOUTQ: { |
861 | int amount = sk_wmem_alloc_get(sk); | |
31e6d363 | 862 | |
4500ebf8 JP |
863 | return put_user(amount, (int __user *)arg); |
864 | } | |
865 | case SIOCINQ: { | |
866 | struct sk_buff *skb; | |
867 | int amount = 0; | |
868 | ||
869 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
870 | skb = skb_peek(&sk->sk_receive_queue); | |
00db4124 | 871 | if (skb) |
4500ebf8 JP |
872 | amount = skb->len; |
873 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
874 | return put_user(amount, (int __user *)arg); | |
875 | } | |
1da177e4 | 876 | |
4500ebf8 | 877 | default: |
1da177e4 | 878 | #ifdef CONFIG_IP_MROUTE |
4500ebf8 | 879 | return ipmr_ioctl(sk, cmd, (void __user *)arg); |
1da177e4 | 880 | #else |
4500ebf8 | 881 | return -ENOIOCTLCMD; |
1da177e4 LT |
882 | #endif |
883 | } | |
884 | } | |
885 | ||
709b46e8 EB |
886 | #ifdef CONFIG_COMPAT |
887 | static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) | |
888 | { | |
889 | switch (cmd) { | |
890 | case SIOCOUTQ: | |
891 | case SIOCINQ: | |
892 | return -ENOIOCTLCMD; | |
893 | default: | |
894 | #ifdef CONFIG_IP_MROUTE | |
895 | return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg)); | |
896 | #else | |
897 | return -ENOIOCTLCMD; | |
898 | #endif | |
899 | } | |
900 | } | |
901 | #endif | |
902 | ||
432490f9 CG |
903 | int raw_abort(struct sock *sk, int err) |
904 | { | |
905 | lock_sock(sk); | |
906 | ||
907 | sk->sk_err = err; | |
e3ae2365 | 908 | sk_error_report(sk); |
3de864f8 | 909 | __udp_disconnect(sk, 0); |
432490f9 CG |
910 | |
911 | release_sock(sk); | |
912 | ||
913 | return 0; | |
914 | } | |
915 | EXPORT_SYMBOL_GPL(raw_abort); | |
916 | ||
1da177e4 | 917 | struct proto raw_prot = { |
543d9cfe ACM |
918 | .name = "RAW", |
919 | .owner = THIS_MODULE, | |
920 | .close = raw_close, | |
22dd4850 | 921 | .destroy = raw_destroy, |
543d9cfe | 922 | .connect = ip4_datagram_connect, |
286c72de | 923 | .disconnect = __udp_disconnect, |
543d9cfe | 924 | .ioctl = raw_ioctl, |
6897445f | 925 | .init = raw_sk_init, |
543d9cfe ACM |
926 | .setsockopt = raw_setsockopt, |
927 | .getsockopt = raw_getsockopt, | |
928 | .sendmsg = raw_sendmsg, | |
929 | .recvmsg = raw_recvmsg, | |
930 | .bind = raw_bind, | |
931 | .backlog_rcv = raw_rcv_skb, | |
8141ed9f | 932 | .release_cb = ip4_datagram_release_cb, |
fc8717ba PE |
933 | .hash = raw_hash_sk, |
934 | .unhash = raw_unhash_sk, | |
543d9cfe | 935 | .obj_size = sizeof(struct raw_sock), |
8c2bc895 DW |
936 | .useroffset = offsetof(struct raw_sock, filter), |
937 | .usersize = sizeof_field(struct raw_sock, filter), | |
fc8717ba | 938 | .h.raw_hash = &raw_v4_hashinfo, |
3fdadf7d | 939 | #ifdef CONFIG_COMPAT |
709b46e8 | 940 | .compat_ioctl = compat_raw_ioctl, |
3fdadf7d | 941 | #endif |
432490f9 | 942 | .diag_destroy = raw_abort, |
1da177e4 LT |
943 | }; |
944 | ||
945 | #ifdef CONFIG_PROC_FS | |
0daf07e5 | 946 | static struct sock *raw_get_first(struct seq_file *seq, int bucket) |
1da177e4 | 947 | { |
359745d7 | 948 | struct raw_hashinfo *h = pde_data(file_inode(seq->file)); |
5a5f3a8d | 949 | struct raw_iter_state *state = raw_seq_private(seq); |
0daf07e5 ED |
950 | struct hlist_nulls_head *hlist; |
951 | struct hlist_nulls_node *hnode; | |
952 | struct sock *sk; | |
1da177e4 | 953 | |
0daf07e5 | 954 | for (state->bucket = bucket; state->bucket < RAW_HTABLE_SIZE; |
b673e4df | 955 | ++state->bucket) { |
0daf07e5 | 956 | hlist = &h->ht[state->bucket]; |
f289c02b | 957 | sk_nulls_for_each(sk, hnode, hlist) { |
1218854a | 958 | if (sock_net(sk) == seq_file_net(seq)) |
0daf07e5 ED |
959 | return sk; |
960 | } | |
1da177e4 | 961 | } |
0daf07e5 | 962 | return NULL; |
1da177e4 LT |
963 | } |
964 | ||
965 | static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) | |
966 | { | |
5a5f3a8d | 967 | struct raw_iter_state *state = raw_seq_private(seq); |
1da177e4 LT |
968 | |
969 | do { | |
0daf07e5 | 970 | sk = sk_nulls_next(sk); |
1218854a | 971 | } while (sk && sock_net(sk) != seq_file_net(seq)); |
1da177e4 | 972 | |
0daf07e5 ED |
973 | if (!sk) |
974 | return raw_get_first(seq, state->bucket + 1); | |
1da177e4 LT |
975 | return sk; |
976 | } | |
977 | ||
978 | static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos) | |
979 | { | |
0daf07e5 | 980 | struct sock *sk = raw_get_first(seq, 0); |
1da177e4 LT |
981 | |
982 | if (sk) | |
983 | while (pos && (sk = raw_get_next(seq, sk)) != NULL) | |
984 | --pos; | |
985 | return pos ? NULL : sk; | |
986 | } | |
987 | ||
42a73808 | 988 | void *raw_seq_start(struct seq_file *seq, loff_t *pos) |
0daf07e5 | 989 | __acquires(RCU) |
1da177e4 | 990 | { |
0daf07e5 | 991 | rcu_read_lock(); |
1da177e4 LT |
992 | return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
993 | } | |
42a73808 | 994 | EXPORT_SYMBOL_GPL(raw_seq_start); |
1da177e4 | 995 | |
42a73808 | 996 | void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
1da177e4 LT |
997 | { |
998 | struct sock *sk; | |
999 | ||
1000 | if (v == SEQ_START_TOKEN) | |
0daf07e5 | 1001 | sk = raw_get_first(seq, 0); |
1da177e4 LT |
1002 | else |
1003 | sk = raw_get_next(seq, v); | |
1004 | ++*pos; | |
1005 | return sk; | |
1006 | } | |
42a73808 | 1007 | EXPORT_SYMBOL_GPL(raw_seq_next); |
1da177e4 | 1008 | |
42a73808 | 1009 | void raw_seq_stop(struct seq_file *seq, void *v) |
0daf07e5 | 1010 | __releases(RCU) |
1da177e4 | 1011 | { |
0daf07e5 | 1012 | rcu_read_unlock(); |
1da177e4 | 1013 | } |
42a73808 | 1014 | EXPORT_SYMBOL_GPL(raw_seq_stop); |
1da177e4 | 1015 | |
8cd850ef | 1016 | static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
1da177e4 LT |
1017 | { |
1018 | struct inet_sock *inet = inet_sk(sp); | |
c720c7e8 ED |
1019 | __be32 dest = inet->inet_daddr, |
1020 | src = inet->inet_rcv_saddr; | |
1da177e4 | 1021 | __u16 destp = 0, |
c720c7e8 | 1022 | srcp = inet->inet_num; |
1da177e4 | 1023 | |
8cd850ef | 1024 | seq_printf(seq, "%4d: %08X:%04X %08X:%04X" |
ea9a0379 | 1025 | " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n", |
e905a9ed | 1026 | i, src, srcp, dest, destp, sp->sk_state, |
31e6d363 ED |
1027 | sk_wmem_alloc_get(sp), |
1028 | sk_rmem_alloc_get(sp), | |
a7cb5a49 EB |
1029 | 0, 0L, 0, |
1030 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), | |
1031 | 0, sock_i_ino(sp), | |
41c6d650 | 1032 | refcount_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
1da177e4 LT |
1033 | } |
1034 | ||
1035 | static int raw_seq_show(struct seq_file *seq, void *v) | |
1036 | { | |
1da177e4 | 1037 | if (v == SEQ_START_TOKEN) |
8cd850ef DL |
1038 | seq_printf(seq, " sl local_address rem_address st tx_queue " |
1039 | "rx_queue tr tm->when retrnsmt uid timeout " | |
cb61cb9b | 1040 | "inode ref pointer drops\n"); |
8cd850ef DL |
1041 | else |
1042 | raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); | |
1da177e4 LT |
1043 | return 0; |
1044 | } | |
1045 | ||
f690808e | 1046 | static const struct seq_operations raw_seq_ops = { |
1da177e4 LT |
1047 | .start = raw_seq_start, |
1048 | .next = raw_seq_next, | |
1049 | .stop = raw_seq_stop, | |
1050 | .show = raw_seq_show, | |
1051 | }; | |
1052 | ||
a308da16 | 1053 | static __net_init int raw_init_net(struct net *net) |
1da177e4 | 1054 | { |
c3506372 CH |
1055 | if (!proc_create_net_data("raw", 0444, net->proc_net, &raw_seq_ops, |
1056 | sizeof(struct raw_iter_state), &raw_v4_hashinfo)) | |
1da177e4 | 1057 | return -ENOMEM; |
a308da16 | 1058 | |
1da177e4 LT |
1059 | return 0; |
1060 | } | |
1061 | ||
a308da16 PE |
1062 | static __net_exit void raw_exit_net(struct net *net) |
1063 | { | |
ece31ffd | 1064 | remove_proc_entry("raw", net->proc_net); |
a308da16 PE |
1065 | } |
1066 | ||
1067 | static __net_initdata struct pernet_operations raw_net_ops = { | |
1068 | .init = raw_init_net, | |
1069 | .exit = raw_exit_net, | |
1070 | }; | |
1071 | ||
1072 | int __init raw_proc_init(void) | |
1073 | { | |
0daf07e5 | 1074 | |
a308da16 PE |
1075 | return register_pernet_subsys(&raw_net_ops); |
1076 | } | |
1077 | ||
1da177e4 LT |
1078 | void __init raw_proc_exit(void) |
1079 | { | |
a308da16 | 1080 | unregister_pernet_subsys(&raw_net_ops); |
1da177e4 | 1081 | } |
86d1d8b7 | 1082 | #endif /* CONFIG_PROC_FS */ |
6897445f MM |
1083 | |
1084 | static void raw_sysctl_init_net(struct net *net) | |
1085 | { | |
1086 | #ifdef CONFIG_NET_L3_MASTER_DEV | |
1087 | net->ipv4.sysctl_raw_l3mdev_accept = 1; | |
1088 | #endif | |
1089 | } | |
1090 | ||
1091 | static int __net_init raw_sysctl_init(struct net *net) | |
1092 | { | |
1093 | raw_sysctl_init_net(net); | |
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | static struct pernet_operations __net_initdata raw_sysctl_ops = { | |
1098 | .init = raw_sysctl_init, | |
1099 | }; | |
1100 | ||
1101 | void __init raw_init(void) | |
1102 | { | |
1103 | raw_sysctl_init_net(&init_net); | |
1104 | if (register_pernet_subsys(&raw_sysctl_ops)) | |
1105 | panic("RAW: failed to init sysctl parameters.\n"); | |
1106 | } |