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Commit | Line | Data |
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77d8bf9c ACM |
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 | * Generic INET transport hashtables | |
7 | * | |
8 | * Authors: Lotsa people, from code originally in tcp | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
2d8c4ce5 | 16 | #include <linux/module.h> |
a7f5e7f1 | 17 | #include <linux/random.h> |
f3f05f70 | 18 | #include <linux/sched.h> |
77d8bf9c | 19 | #include <linux/slab.h> |
f3f05f70 | 20 | #include <linux/wait.h> |
77d8bf9c | 21 | |
463c84b9 | 22 | #include <net/inet_connection_sock.h> |
77d8bf9c | 23 | #include <net/inet_hashtables.h> |
a7f5e7f1 | 24 | #include <net/ip.h> |
77d8bf9c ACM |
25 | |
26 | /* | |
27 | * Allocate and initialize a new local port bind bucket. | |
28 | * The bindhash mutex for snum's hash chain must be held here. | |
29 | */ | |
e18b890b | 30 | struct inet_bind_bucket *inet_bind_bucket_create(struct kmem_cache *cachep, |
941b1d22 | 31 | struct net *net, |
77d8bf9c ACM |
32 | struct inet_bind_hashbucket *head, |
33 | const unsigned short snum) | |
34 | { | |
54e6ecb2 | 35 | struct inet_bind_bucket *tb = kmem_cache_alloc(cachep, GFP_ATOMIC); |
77d8bf9c ACM |
36 | |
37 | if (tb != NULL) { | |
941b1d22 | 38 | tb->ib_net = net; |
77d8bf9c ACM |
39 | tb->port = snum; |
40 | tb->fastreuse = 0; | |
41 | INIT_HLIST_HEAD(&tb->owners); | |
42 | hlist_add_head(&tb->node, &head->chain); | |
43 | } | |
44 | return tb; | |
45 | } | |
46 | ||
77d8bf9c ACM |
47 | /* |
48 | * Caller must hold hashbucket lock for this tb with local BH disabled | |
49 | */ | |
e18b890b | 50 | void inet_bind_bucket_destroy(struct kmem_cache *cachep, struct inet_bind_bucket *tb) |
77d8bf9c ACM |
51 | { |
52 | if (hlist_empty(&tb->owners)) { | |
53 | __hlist_del(&tb->node); | |
54 | kmem_cache_free(cachep, tb); | |
55 | } | |
56 | } | |
2d8c4ce5 ACM |
57 | |
58 | void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb, | |
59 | const unsigned short snum) | |
60 | { | |
463c84b9 | 61 | inet_sk(sk)->num = snum; |
2d8c4ce5 | 62 | sk_add_bind_node(sk, &tb->owners); |
463c84b9 | 63 | inet_csk(sk)->icsk_bind_hash = tb; |
2d8c4ce5 ACM |
64 | } |
65 | ||
2d8c4ce5 ACM |
66 | /* |
67 | * Get rid of any references to a local port held by the given sock. | |
68 | */ | |
ab1e0a13 | 69 | static void __inet_put_port(struct sock *sk) |
2d8c4ce5 | 70 | { |
ab1e0a13 | 71 | struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo; |
463c84b9 | 72 | const int bhash = inet_bhashfn(inet_sk(sk)->num, hashinfo->bhash_size); |
2d8c4ce5 ACM |
73 | struct inet_bind_hashbucket *head = &hashinfo->bhash[bhash]; |
74 | struct inet_bind_bucket *tb; | |
75 | ||
76 | spin_lock(&head->lock); | |
463c84b9 | 77 | tb = inet_csk(sk)->icsk_bind_hash; |
2d8c4ce5 | 78 | __sk_del_bind_node(sk); |
463c84b9 ACM |
79 | inet_csk(sk)->icsk_bind_hash = NULL; |
80 | inet_sk(sk)->num = 0; | |
2d8c4ce5 ACM |
81 | inet_bind_bucket_destroy(hashinfo->bind_bucket_cachep, tb); |
82 | spin_unlock(&head->lock); | |
83 | } | |
84 | ||
ab1e0a13 | 85 | void inet_put_port(struct sock *sk) |
2d8c4ce5 ACM |
86 | { |
87 | local_bh_disable(); | |
ab1e0a13 | 88 | __inet_put_port(sk); |
2d8c4ce5 ACM |
89 | local_bh_enable(); |
90 | } | |
91 | ||
92 | EXPORT_SYMBOL(inet_put_port); | |
f3f05f70 ACM |
93 | |
94 | /* | |
95 | * This lock without WQ_FLAG_EXCLUSIVE is good on UP and it can be very bad on SMP. | |
96 | * Look, when several writers sleep and reader wakes them up, all but one | |
97 | * immediately hit write lock and grab all the cpus. Exclusive sleep solves | |
98 | * this, _but_ remember, it adds useless work on UP machines (wake up each | |
99 | * exclusive lock release). It should be ifdefed really. | |
100 | */ | |
101 | void inet_listen_wlock(struct inet_hashinfo *hashinfo) | |
9a429c49 | 102 | __acquires(hashinfo->lhash_lock) |
f3f05f70 ACM |
103 | { |
104 | write_lock(&hashinfo->lhash_lock); | |
105 | ||
106 | if (atomic_read(&hashinfo->lhash_users)) { | |
107 | DEFINE_WAIT(wait); | |
108 | ||
109 | for (;;) { | |
110 | prepare_to_wait_exclusive(&hashinfo->lhash_wait, | |
111 | &wait, TASK_UNINTERRUPTIBLE); | |
112 | if (!atomic_read(&hashinfo->lhash_users)) | |
113 | break; | |
114 | write_unlock_bh(&hashinfo->lhash_lock); | |
115 | schedule(); | |
116 | write_lock_bh(&hashinfo->lhash_lock); | |
117 | } | |
118 | ||
119 | finish_wait(&hashinfo->lhash_wait, &wait); | |
120 | } | |
121 | } | |
122 | ||
33b62231 ACM |
123 | /* |
124 | * Don't inline this cruft. Here are some nice properties to exploit here. The | |
125 | * BSD API does not allow a listening sock to specify the remote port nor the | |
126 | * remote address for the connection. So always assume those are both | |
127 | * wildcarded during the search since they can never be otherwise. | |
128 | */ | |
c67499c0 PE |
129 | static struct sock *inet_lookup_listener_slow(struct net *net, |
130 | const struct hlist_head *head, | |
fb99c848 | 131 | const __be32 daddr, |
8f491069 HX |
132 | const unsigned short hnum, |
133 | const int dif) | |
33b62231 ACM |
134 | { |
135 | struct sock *result = NULL, *sk; | |
136 | const struct hlist_node *node; | |
137 | int hiscore = -1; | |
138 | ||
139 | sk_for_each(sk, node, head) { | |
140 | const struct inet_sock *inet = inet_sk(sk); | |
141 | ||
c67499c0 PE |
142 | if (sk->sk_net == net && inet->num == hnum && |
143 | !ipv6_only_sock(sk)) { | |
fb99c848 | 144 | const __be32 rcv_saddr = inet->rcv_saddr; |
33b62231 ACM |
145 | int score = sk->sk_family == PF_INET ? 1 : 0; |
146 | ||
147 | if (rcv_saddr) { | |
148 | if (rcv_saddr != daddr) | |
149 | continue; | |
150 | score += 2; | |
151 | } | |
152 | if (sk->sk_bound_dev_if) { | |
153 | if (sk->sk_bound_dev_if != dif) | |
154 | continue; | |
155 | score += 2; | |
156 | } | |
157 | if (score == 5) | |
158 | return sk; | |
159 | if (score > hiscore) { | |
160 | hiscore = score; | |
161 | result = sk; | |
162 | } | |
163 | } | |
164 | } | |
165 | return result; | |
166 | } | |
e48c414e | 167 | |
99a92ff5 | 168 | /* Optimize the common listener case. */ |
c67499c0 PE |
169 | struct sock *__inet_lookup_listener(struct net *net, |
170 | struct inet_hashinfo *hashinfo, | |
fb99c848 | 171 | const __be32 daddr, const unsigned short hnum, |
8f491069 | 172 | const int dif) |
99a92ff5 HX |
173 | { |
174 | struct sock *sk = NULL; | |
175 | const struct hlist_head *head; | |
176 | ||
177 | read_lock(&hashinfo->lhash_lock); | |
178 | head = &hashinfo->listening_hash[inet_lhashfn(hnum)]; | |
179 | if (!hlist_empty(head)) { | |
180 | const struct inet_sock *inet = inet_sk((sk = __sk_head(head))); | |
181 | ||
182 | if (inet->num == hnum && !sk->sk_node.next && | |
183 | (!inet->rcv_saddr || inet->rcv_saddr == daddr) && | |
184 | (sk->sk_family == PF_INET || !ipv6_only_sock(sk)) && | |
c67499c0 | 185 | !sk->sk_bound_dev_if && sk->sk_net == net) |
99a92ff5 | 186 | goto sherry_cache; |
c67499c0 | 187 | sk = inet_lookup_listener_slow(net, head, daddr, hnum, dif); |
99a92ff5 HX |
188 | } |
189 | if (sk) { | |
190 | sherry_cache: | |
191 | sock_hold(sk); | |
192 | } | |
193 | read_unlock(&hashinfo->lhash_lock); | |
194 | return sk; | |
195 | } | |
8f491069 | 196 | EXPORT_SYMBOL_GPL(__inet_lookup_listener); |
a7f5e7f1 | 197 | |
c67499c0 PE |
198 | struct sock * __inet_lookup_established(struct net *net, |
199 | struct inet_hashinfo *hashinfo, | |
77a5ba55 PE |
200 | const __be32 saddr, const __be16 sport, |
201 | const __be32 daddr, const u16 hnum, | |
202 | const int dif) | |
203 | { | |
204 | INET_ADDR_COOKIE(acookie, saddr, daddr) | |
205 | const __portpair ports = INET_COMBINED_PORTS(sport, hnum); | |
206 | struct sock *sk; | |
207 | const struct hlist_node *node; | |
208 | /* Optimize here for direct hit, only listening connections can | |
209 | * have wildcards anyways. | |
210 | */ | |
211 | unsigned int hash = inet_ehashfn(daddr, hnum, saddr, sport); | |
212 | struct inet_ehash_bucket *head = inet_ehash_bucket(hashinfo, hash); | |
213 | rwlock_t *lock = inet_ehash_lockp(hashinfo, hash); | |
214 | ||
215 | prefetch(head->chain.first); | |
216 | read_lock(lock); | |
217 | sk_for_each(sk, node, &head->chain) { | |
c67499c0 PE |
218 | if (INET_MATCH(sk, net, hash, acookie, |
219 | saddr, daddr, ports, dif)) | |
77a5ba55 PE |
220 | goto hit; /* You sunk my battleship! */ |
221 | } | |
222 | ||
223 | /* Must check for a TIME_WAIT'er before going to listener hash. */ | |
224 | sk_for_each(sk, node, &head->twchain) { | |
c67499c0 PE |
225 | if (INET_TW_MATCH(sk, net, hash, acookie, |
226 | saddr, daddr, ports, dif)) | |
77a5ba55 PE |
227 | goto hit; |
228 | } | |
229 | sk = NULL; | |
230 | out: | |
231 | read_unlock(lock); | |
232 | return sk; | |
233 | hit: | |
234 | sock_hold(sk); | |
235 | goto out; | |
236 | } | |
237 | EXPORT_SYMBOL_GPL(__inet_lookup_established); | |
238 | ||
a7f5e7f1 ACM |
239 | /* called with local bh disabled */ |
240 | static int __inet_check_established(struct inet_timewait_death_row *death_row, | |
241 | struct sock *sk, __u16 lport, | |
242 | struct inet_timewait_sock **twp) | |
243 | { | |
244 | struct inet_hashinfo *hinfo = death_row->hashinfo; | |
245 | struct inet_sock *inet = inet_sk(sk); | |
fb99c848 AV |
246 | __be32 daddr = inet->rcv_saddr; |
247 | __be32 saddr = inet->daddr; | |
a7f5e7f1 ACM |
248 | int dif = sk->sk_bound_dev_if; |
249 | INET_ADDR_COOKIE(acookie, saddr, daddr) | |
4f765d84 | 250 | const __portpair ports = INET_COMBINED_PORTS(inet->dport, lport); |
a7f5e7f1 ACM |
251 | unsigned int hash = inet_ehashfn(daddr, lport, saddr, inet->dport); |
252 | struct inet_ehash_bucket *head = inet_ehash_bucket(hinfo, hash); | |
230140cf | 253 | rwlock_t *lock = inet_ehash_lockp(hinfo, hash); |
a7f5e7f1 ACM |
254 | struct sock *sk2; |
255 | const struct hlist_node *node; | |
256 | struct inet_timewait_sock *tw; | |
c67499c0 | 257 | struct net *net = sk->sk_net; |
a7f5e7f1 ACM |
258 | |
259 | prefetch(head->chain.first); | |
230140cf | 260 | write_lock(lock); |
a7f5e7f1 ACM |
261 | |
262 | /* Check TIME-WAIT sockets first. */ | |
dbca9b27 | 263 | sk_for_each(sk2, node, &head->twchain) { |
a7f5e7f1 ACM |
264 | tw = inet_twsk(sk2); |
265 | ||
c67499c0 PE |
266 | if (INET_TW_MATCH(sk2, net, hash, acookie, |
267 | saddr, daddr, ports, dif)) { | |
a7f5e7f1 ACM |
268 | if (twsk_unique(sk, sk2, twp)) |
269 | goto unique; | |
270 | else | |
271 | goto not_unique; | |
272 | } | |
273 | } | |
274 | tw = NULL; | |
275 | ||
276 | /* And established part... */ | |
277 | sk_for_each(sk2, node, &head->chain) { | |
c67499c0 PE |
278 | if (INET_MATCH(sk2, net, hash, acookie, |
279 | saddr, daddr, ports, dif)) | |
a7f5e7f1 ACM |
280 | goto not_unique; |
281 | } | |
282 | ||
283 | unique: | |
284 | /* Must record num and sport now. Otherwise we will see | |
285 | * in hash table socket with a funny identity. */ | |
286 | inet->num = lport; | |
287 | inet->sport = htons(lport); | |
288 | sk->sk_hash = hash; | |
289 | BUG_TRAP(sk_unhashed(sk)); | |
290 | __sk_add_node(sk, &head->chain); | |
65f76517 | 291 | sock_prot_inuse_add(sk->sk_prot, 1); |
230140cf | 292 | write_unlock(lock); |
a7f5e7f1 ACM |
293 | |
294 | if (twp) { | |
295 | *twp = tw; | |
296 | NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED); | |
297 | } else if (tw) { | |
298 | /* Silly. Should hash-dance instead... */ | |
299 | inet_twsk_deschedule(tw, death_row); | |
300 | NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED); | |
301 | ||
302 | inet_twsk_put(tw); | |
303 | } | |
304 | ||
305 | return 0; | |
306 | ||
307 | not_unique: | |
230140cf | 308 | write_unlock(lock); |
a7f5e7f1 ACM |
309 | return -EADDRNOTAVAIL; |
310 | } | |
311 | ||
312 | static inline u32 inet_sk_port_offset(const struct sock *sk) | |
313 | { | |
314 | const struct inet_sock *inet = inet_sk(sk); | |
e905a9ed | 315 | return secure_ipv4_port_ephemeral(inet->rcv_saddr, inet->daddr, |
a7f5e7f1 ACM |
316 | inet->dport); |
317 | } | |
318 | ||
ab1e0a13 | 319 | void __inet_hash_nolisten(struct sock *sk) |
152da81d | 320 | { |
ab1e0a13 | 321 | struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo; |
152da81d PE |
322 | struct hlist_head *list; |
323 | rwlock_t *lock; | |
324 | struct inet_ehash_bucket *head; | |
325 | ||
326 | BUG_TRAP(sk_unhashed(sk)); | |
327 | ||
328 | sk->sk_hash = inet_sk_ehashfn(sk); | |
329 | head = inet_ehash_bucket(hashinfo, sk->sk_hash); | |
330 | list = &head->chain; | |
331 | lock = inet_ehash_lockp(hashinfo, sk->sk_hash); | |
332 | ||
333 | write_lock(lock); | |
334 | __sk_add_node(sk, list); | |
65f76517 | 335 | sock_prot_inuse_add(sk->sk_prot, 1); |
152da81d PE |
336 | write_unlock(lock); |
337 | } | |
338 | EXPORT_SYMBOL_GPL(__inet_hash_nolisten); | |
339 | ||
ab1e0a13 | 340 | static void __inet_hash(struct sock *sk) |
152da81d | 341 | { |
ab1e0a13 | 342 | struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo; |
152da81d PE |
343 | struct hlist_head *list; |
344 | rwlock_t *lock; | |
345 | ||
346 | if (sk->sk_state != TCP_LISTEN) { | |
ab1e0a13 | 347 | __inet_hash_nolisten(sk); |
152da81d PE |
348 | return; |
349 | } | |
350 | ||
351 | BUG_TRAP(sk_unhashed(sk)); | |
352 | list = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)]; | |
353 | lock = &hashinfo->lhash_lock; | |
354 | ||
355 | inet_listen_wlock(hashinfo); | |
356 | __sk_add_node(sk, list); | |
65f76517 | 357 | sock_prot_inuse_add(sk->sk_prot, 1); |
152da81d PE |
358 | write_unlock(lock); |
359 | wake_up(&hashinfo->lhash_wait); | |
360 | } | |
ab1e0a13 ACM |
361 | |
362 | void inet_hash(struct sock *sk) | |
363 | { | |
364 | if (sk->sk_state != TCP_CLOSE) { | |
365 | local_bh_disable(); | |
366 | __inet_hash(sk); | |
367 | local_bh_enable(); | |
368 | } | |
369 | } | |
370 | EXPORT_SYMBOL_GPL(inet_hash); | |
371 | ||
372 | void inet_unhash(struct sock *sk) | |
373 | { | |
374 | rwlock_t *lock; | |
375 | struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo; | |
376 | ||
377 | if (sk_unhashed(sk)) | |
378 | goto out; | |
379 | ||
380 | if (sk->sk_state == TCP_LISTEN) { | |
381 | local_bh_disable(); | |
382 | inet_listen_wlock(hashinfo); | |
383 | lock = &hashinfo->lhash_lock; | |
384 | } else { | |
385 | lock = inet_ehash_lockp(hashinfo, sk->sk_hash); | |
386 | write_lock_bh(lock); | |
387 | } | |
388 | ||
389 | if (__sk_del_node_init(sk)) | |
390 | sock_prot_inuse_add(sk->sk_prot, -1); | |
391 | write_unlock_bh(lock); | |
392 | out: | |
393 | if (sk->sk_state == TCP_LISTEN) | |
394 | wake_up(&hashinfo->lhash_wait); | |
395 | } | |
396 | EXPORT_SYMBOL_GPL(inet_unhash); | |
152da81d | 397 | |
5ee31fc1 | 398 | int __inet_hash_connect(struct inet_timewait_death_row *death_row, |
5d8c0aa9 | 399 | struct sock *sk, u32 port_offset, |
5ee31fc1 PE |
400 | int (*check_established)(struct inet_timewait_death_row *, |
401 | struct sock *, __u16, struct inet_timewait_sock **), | |
ab1e0a13 | 402 | void (*hash)(struct sock *sk)) |
a7f5e7f1 ACM |
403 | { |
404 | struct inet_hashinfo *hinfo = death_row->hashinfo; | |
405 | const unsigned short snum = inet_sk(sk)->num; | |
e905a9ed YH |
406 | struct inet_bind_hashbucket *head; |
407 | struct inet_bind_bucket *tb; | |
a7f5e7f1 | 408 | int ret; |
941b1d22 | 409 | struct net *net = sk->sk_net; |
a7f5e7f1 | 410 | |
e905a9ed | 411 | if (!snum) { |
227b60f5 | 412 | int i, remaining, low, high, port; |
a7f5e7f1 | 413 | static u32 hint; |
5d8c0aa9 | 414 | u32 offset = hint + port_offset; |
a7f5e7f1 | 415 | struct hlist_node *node; |
e905a9ed | 416 | struct inet_timewait_sock *tw = NULL; |
a7f5e7f1 | 417 | |
227b60f5 | 418 | inet_get_local_port_range(&low, &high); |
a25de534 | 419 | remaining = (high - low) + 1; |
227b60f5 | 420 | |
e905a9ed | 421 | local_bh_disable(); |
227b60f5 SH |
422 | for (i = 1; i <= remaining; i++) { |
423 | port = low + (i + offset) % remaining; | |
e905a9ed YH |
424 | head = &hinfo->bhash[inet_bhashfn(port, hinfo->bhash_size)]; |
425 | spin_lock(&head->lock); | |
a7f5e7f1 | 426 | |
e905a9ed YH |
427 | /* Does not bother with rcv_saddr checks, |
428 | * because the established check is already | |
429 | * unique enough. | |
430 | */ | |
a7f5e7f1 | 431 | inet_bind_bucket_for_each(tb, node, &head->chain) { |
941b1d22 | 432 | if (tb->ib_net == net && tb->port == port) { |
e905a9ed YH |
433 | BUG_TRAP(!hlist_empty(&tb->owners)); |
434 | if (tb->fastreuse >= 0) | |
435 | goto next_port; | |
5ee31fc1 PE |
436 | if (!check_established(death_row, sk, |
437 | port, &tw)) | |
e905a9ed YH |
438 | goto ok; |
439 | goto next_port; | |
440 | } | |
441 | } | |
442 | ||
941b1d22 PE |
443 | tb = inet_bind_bucket_create(hinfo->bind_bucket_cachep, |
444 | net, head, port); | |
e905a9ed YH |
445 | if (!tb) { |
446 | spin_unlock(&head->lock); | |
447 | break; | |
448 | } | |
449 | tb->fastreuse = -1; | |
450 | goto ok; | |
451 | ||
452 | next_port: | |
453 | spin_unlock(&head->lock); | |
454 | } | |
455 | local_bh_enable(); | |
456 | ||
457 | return -EADDRNOTAVAIL; | |
a7f5e7f1 ACM |
458 | |
459 | ok: | |
460 | hint += i; | |
461 | ||
e905a9ed YH |
462 | /* Head lock still held and bh's disabled */ |
463 | inet_bind_hash(sk, tb, port); | |
a7f5e7f1 | 464 | if (sk_unhashed(sk)) { |
e905a9ed | 465 | inet_sk(sk)->sport = htons(port); |
ab1e0a13 | 466 | hash(sk); |
e905a9ed YH |
467 | } |
468 | spin_unlock(&head->lock); | |
a7f5e7f1 | 469 | |
e905a9ed YH |
470 | if (tw) { |
471 | inet_twsk_deschedule(tw, death_row); | |
472 | inet_twsk_put(tw); | |
473 | } | |
a7f5e7f1 ACM |
474 | |
475 | ret = 0; | |
476 | goto out; | |
e905a9ed | 477 | } |
a7f5e7f1 | 478 | |
e905a9ed YH |
479 | head = &hinfo->bhash[inet_bhashfn(snum, hinfo->bhash_size)]; |
480 | tb = inet_csk(sk)->icsk_bind_hash; | |
a7f5e7f1 ACM |
481 | spin_lock_bh(&head->lock); |
482 | if (sk_head(&tb->owners) == sk && !sk->sk_bind_node.next) { | |
ab1e0a13 | 483 | hash(sk); |
a7f5e7f1 ACM |
484 | spin_unlock_bh(&head->lock); |
485 | return 0; | |
486 | } else { | |
487 | spin_unlock(&head->lock); | |
488 | /* No definite answer... Walk to established hash table */ | |
5ee31fc1 | 489 | ret = check_established(death_row, sk, snum, NULL); |
a7f5e7f1 ACM |
490 | out: |
491 | local_bh_enable(); | |
492 | return ret; | |
493 | } | |
494 | } | |
5ee31fc1 PE |
495 | |
496 | /* | |
497 | * Bind a port for a connect operation and hash it. | |
498 | */ | |
499 | int inet_hash_connect(struct inet_timewait_death_row *death_row, | |
500 | struct sock *sk) | |
501 | { | |
5d8c0aa9 | 502 | return __inet_hash_connect(death_row, sk, inet_sk_port_offset(sk), |
5ee31fc1 PE |
503 | __inet_check_established, __inet_hash_nolisten); |
504 | } | |
a7f5e7f1 ACM |
505 | |
506 | EXPORT_SYMBOL_GPL(inet_hash_connect); |