Mercurial > hg > nginx
annotate src/core/ngx_sha1.h @ 9138:a90f79792b5d
QUIC: optimized ACK delay.
Previously ACK was not generated if max_ack_delay was not yet expired and the
number of unacknowledged ack-eliciting packets was less than two, as allowed by
RFC 9000 13.2.1-13.2.2. However this only makes sense to avoid sending ACK-only
packets, as explained by the RFC:
On the other hand, reducing the frequency of packets that carry only
acknowledgments reduces packet transmission and processing cost at both
endpoints.
Now ACK is delayed only if output frame queue is empty. Otherwise ACK is sent
immediately, which significantly improves QUIC performance with certain tests.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Thu, 27 Jul 2023 16:37:17 +0400 |
parents | 9eefb38f0005 |
children |
rev | line source |
---|---|
1573 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
1573 | 5 */ |
6 | |
7 | |
8 #ifndef _NGX_SHA1_H_INCLUDED_ | |
9 #define _NGX_SHA1_H_INCLUDED_ | |
10 | |
11 | |
12 #include <ngx_config.h> | |
13 #include <ngx_core.h> | |
14 | |
15 | |
6586
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
16 typedef struct { |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
17 uint64_t bytes; |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
18 uint32_t a, b, c, d, e, f; |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
19 u_char buffer[64]; |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
20 } ngx_sha1_t; |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
21 |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
22 |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
23 void ngx_sha1_init(ngx_sha1_t *ctx); |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
24 void ngx_sha1_update(ngx_sha1_t *ctx, const void *data, size_t size); |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
25 void ngx_sha1_final(u_char result[20], ngx_sha1_t *ctx); |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
26 |
1064ea81ed3a
An internal SHA1 implementation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
27 |
1573 | 28 #endif /* _NGX_SHA1_H_INCLUDED_ */ |