Mercurial > hg > nginx-quic
annotate src/core/ngx_shmtx.h @ 8551:c35b255d80dc quic
HTTP/3: close connection on keepalive_requests * 2.
After receiving GOAWAY, client is not supposed to create new streams. However,
until client reads this frame, we allow it to create new streams, which are
gracefully rejected. To prevent client from abusing this algorithm, a new
limit is introduced. Upon reaching keepalive_requests * 2, server now closes
the entire QUIC connection claiming excessive load.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Thu, 29 Jul 2021 16:01:37 +0300 |
parents | 512c741fa841 |
children |
rev | line source |
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611 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
611 | 5 */ |
6 | |
7 | |
8 #ifndef _NGX_SHMTX_H_INCLUDED_ | |
9 #define _NGX_SHMTX_H_INCLUDED_ | |
10 | |
11 | |
12 #include <ngx_config.h> | |
13 #include <ngx_core.h> | |
14 | |
15 | |
16 typedef struct { | |
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17 ngx_atomic_t lock; |
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18 #if (NGX_HAVE_POSIX_SEM) |
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19 ngx_atomic_t wait; |
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parents:
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20 #endif |
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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21 } ngx_shmtx_sh_t; |
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
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22 |
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Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents:
3909
diff
changeset
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23 |
3f6040cd731e
Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents:
3909
diff
changeset
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24 typedef struct { |
611 | 25 #if (NGX_HAVE_ATOMIC_OPS) |
26 ngx_atomic_t *lock; | |
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Igor Sysoev <igor@sysoev.ru>
parents:
2563
diff
changeset
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27 #if (NGX_HAVE_POSIX_SEM) |
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Maxim Dounin <mdounin@mdounin.ru>
parents:
3909
diff
changeset
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28 ngx_atomic_t *wait; |
3909
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parents:
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29 ngx_uint_t semaphore; |
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parents:
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30 sem_t sem; |
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Igor Sysoev <igor@sysoev.ru>
parents:
2563
diff
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31 #endif |
611 | 32 #else |
33 ngx_fd_t fd; | |
34 u_char *name; | |
35 #endif | |
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Igor Sysoev <igor@sysoev.ru>
parents:
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36 ngx_uint_t spin; |
611 | 37 } ngx_shmtx_t; |
38 | |
39 | |
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parents:
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40 ngx_int_t ngx_shmtx_create(ngx_shmtx_t *mtx, ngx_shmtx_sh_t *addr, |
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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41 u_char *name); |
4738
512c741fa841
Fixed typo in a function name.
Ruslan Ermilov <ru@nginx.com>
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42 void ngx_shmtx_destroy(ngx_shmtx_t *mtx); |
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Igor Sysoev <igor@sysoev.ru>
parents:
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43 ngx_uint_t ngx_shmtx_trylock(ngx_shmtx_t *mtx); |
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Igor Sysoev <igor@sysoev.ru>
parents:
2563
diff
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44 void ngx_shmtx_lock(ngx_shmtx_t *mtx); |
0daede16d68b
use POSIX semaphores in shmtx instead of sched_yield()
Igor Sysoev <igor@sysoev.ru>
parents:
2563
diff
changeset
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45 void ngx_shmtx_unlock(ngx_shmtx_t *mtx); |
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Added shmtx interface to forcibly unlock mutexes.
Maxim Dounin <mdounin@mdounin.ru>
parents:
3909
diff
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46 ngx_uint_t ngx_shmtx_force_unlock(ngx_shmtx_t *mtx, ngx_pid_t pid); |
611 | 47 |
48 | |
49 #endif /* _NGX_SHMTX_H_INCLUDED_ */ |