Mercurial > hg > nginx-quic
annotate src/core/ngx_crc32.h @ 7335:fbb683496705
HTTP/2: workaround for clients which fail on table size updates.
There are clients which cannot handle HPACK's dynamic table size updates
as added in 12cadc4669a7 (1.13.6). Notably, old versions of OkHttp library
are known to fail on it (ticket #1397).
This change makes it possible to work with such clients by only sending
dynamic table size updates in response to SETTINGS_HEADER_TABLE_SIZE. As
a downside, clients which do not use SETTINGS_HEADER_TABLE_SIZE will
continue to maintain default 4k table.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 09 Aug 2018 20:12:17 +0300 |
parents | d620f497c50f |
children |
rev | line source |
---|---|
790 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
790 | 5 */ |
6 | |
7 | |
8 #ifndef _NGX_CRC32_H_INCLUDED_ | |
9 #define _NGX_CRC32_H_INCLUDED_ | |
10 | |
11 | |
12 #include <ngx_config.h> | |
13 #include <ngx_core.h> | |
14 | |
15 | |
793
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
16 extern uint32_t *ngx_crc32_table_short; |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
17 extern uint32_t ngx_crc32_table256[]; |
790 | 18 |
19 | |
20 static ngx_inline uint32_t | |
793
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
21 ngx_crc32_short(u_char *p, size_t len) |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
22 { |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
23 u_char c; |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
24 uint32_t crc; |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
25 |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
26 crc = 0xffffffff; |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
27 |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
28 while (len--) { |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
29 c = *p++; |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
30 crc = ngx_crc32_table_short[(crc ^ (c & 0xf)) & 0xf] ^ (crc >> 4); |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
31 crc = ngx_crc32_table_short[(crc ^ (c >> 4)) & 0xf] ^ (crc >> 4); |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
32 } |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
33 |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
34 return crc ^ 0xffffffff; |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
35 } |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
36 |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
37 |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
38 static ngx_inline uint32_t |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
39 ngx_crc32_long(u_char *p, size_t len) |
790 | 40 { |
41 uint32_t crc; | |
42 | |
43 crc = 0xffffffff; | |
44 | |
45 while (len--) { | |
793
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
46 crc = ngx_crc32_table256[(crc ^ *p++) & 0xff] ^ (crc >> 8); |
790 | 47 } |
48 | |
49 return crc ^ 0xffffffff; | |
50 } | |
51 | |
52 | |
1694
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
53 #define ngx_crc32_init(crc) \ |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
54 crc = 0xffffffff |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
55 |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
56 |
1697 | 57 static ngx_inline void |
1694
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
58 ngx_crc32_update(uint32_t *crc, u_char *p, size_t len) |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
59 { |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
60 uint32_t c; |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
61 |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
62 c = *crc; |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
63 |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
64 while (len--) { |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
65 c = ngx_crc32_table256[(c ^ *p++) & 0xff] ^ (c >> 8); |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
66 } |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
67 |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
68 *crc = c; |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
69 } |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
70 |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
71 |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
72 #define ngx_crc32_final(crc) \ |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
73 crc ^= 0xffffffff |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
74 |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
75 |
8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
Igor Sysoev <igor@sysoev.ru>
parents:
930
diff
changeset
|
76 ngx_int_t ngx_crc32_table_init(void); |
793
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
77 |
8d39da951bbd
split ngx_crc32() to short and long version
Igor Sysoev <igor@sysoev.ru>
parents:
790
diff
changeset
|
78 |
790 | 79 #endif /* _NGX_CRC32_H_INCLUDED_ */ |