Mercurial > hg > nginx
annotate src/core/ngx_array.h @ 9208:2ed3f57dca0a
QUIC: fixed unsent MTU probe acknowledgement.
Previously if an MTU probe send failed early in ngx_quic_frame_sendto()
due to allocation error or congestion control, the application level packet
number was not increased, but was still saved as MTU probe packet number.
Later when a packet with this number was acknowledged, the unsent MTU probe
was acknowledged as well. This could result in discovering a bigger MTU than
supported by the path, which could lead to EMSGSIZE (Message too long) errors
while sending further packets.
The problem existed since PMTUD was introduced in 58afcd72446f (1.25.2).
Back then only the unlikely memory allocation error could trigger it. However
in efcdaa66df2e congestion control was added to ngx_quic_frame_sendto() which
can now trigger the issue with a higher probability.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Wed, 14 Feb 2024 16:56:28 +0400 |
parents | 65b895cd0dfa |
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rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #ifndef _NGX_ARRAY_H_INCLUDED_ |
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9 #define _NGX_ARRAY_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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16 typedef struct { |
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17 void *elts; |
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18 ngx_uint_t nelts; |
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19 size_t size; |
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20 ngx_uint_t nalloc; |
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21 ngx_pool_t *pool; |
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22 } ngx_array_t; |
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24 |
485 | 25 ngx_array_t *ngx_array_create(ngx_pool_t *p, ngx_uint_t n, size_t size); |
26 void ngx_array_destroy(ngx_array_t *a); | |
27 void *ngx_array_push(ngx_array_t *a); | |
28 void *ngx_array_push_n(ngx_array_t *a, ngx_uint_t n); | |
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501 | 31 static ngx_inline ngx_int_t |
32 ngx_array_init(ngx_array_t *array, ngx_pool_t *pool, ngx_uint_t n, size_t size) | |
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33 { |
509 | 34 /* |
35 * set "array->nelts" before "array->elts", otherwise MSVC thinks | |
36 * that "array->nelts" may be used without having been initialized | |
37 */ | |
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38 |
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39 array->nelts = 0; |
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40 array->size = size; |
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41 array->nalloc = n; |
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42 array->pool = pool; |
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43 |
509 | 44 array->elts = ngx_palloc(pool, n * size); |
45 if (array->elts == NULL) { | |
46 return NGX_ERROR; | |
47 } | |
48 | |
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49 return NGX_OK; |
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50 } |
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53 #endif /* _NGX_ARRAY_H_INCLUDED_ */ |