Mercurial > hg > nginx
annotate src/core/ngx_crc32.h @ 8542:d3489d225f8f quic
QUIC: update packet length for short packets too.
During long packet header parsing, pkt->len is updated with the Length
field value that is used to find next coalesced packets in a datagram.
For short packets it still contained the whole QUIC packet size.
This change uniforms packet length handling to always contain the total
length of the packet number and protected packet payload in pkt->len.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Tue, 08 Sep 2020 13:27:39 +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_ */ |