1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef NGHTTP2_HELPER_H
#define NGHTTP2_HELPER_H
#include <config.h>
#include <wsutil/nghttp2/nghttp2/nghttp2.h>
#define nghttp2_min(A, B) ((A) < (B) ? (A) : (B))
#define nghttp2_max(A, B) ((A) > (B) ? (A) : (B))
/*
* Copies 2 byte unsigned integer |n| in host byte order to |buf| in
* network byte order.
*/
void nghttp2_put_uint16be(uint8_t *buf, uint16_t n);
/*
* Copies 4 byte unsigned integer |n| in host byte order to |buf| in
* network byte order.
*/
void nghttp2_put_uint32be(uint8_t *buf, uint32_t n);
/*
* Retrieves 2 byte unsigned integer stored in |data| in network byte
* order and returns it in host byte order.
*/
uint16_t nghttp2_get_uint16(const uint8_t *data);
/*
* Retrieves 4 byte unsigned integer stored in |data| in network byte
* order and returns it in host byte order.
*/
uint32_t nghttp2_get_uint32(const uint8_t *data);
/*
* Ensures that buffer |*buf_ptr| with |*buflen_ptr| length has at
* least |min_length| bytes. If |min_length| > |*buflen_ptr|,
* allocates new buffer having at least |min_length| bytes and assigns
* its pointer to |*buf_ptr| and allocated number of bytes to
* |*buflen_ptr|. The memory pointed by |*buf_ptr| previously may
* change. No memory copy is done between old and new buffer.
* |*buf_ptr| and |*buflen_ptr| are only updated iff this function
* succeeds.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* NGHTTP2_ERR_NOMEM
* Out of memory.
*/
int nghttp2_reserve_buffer(uint8_t **buf_ptr, size_t *buflen_ptr,
size_t min_length);
/*
* Allocates |n| bytes of memory and copy the memory region pointed by
* |src| with the length |n| bytes into it. Returns the allocated memory.
*
* This function returns pointer to allocated memory, or one of the
* following negative error codes:
*
* NGHTTP2_ERR_NOMEM
* Out of memory.
*/
void* nghttp2_memdup(const void* src, size_t n);
void nghttp2_downcase(uint8_t *s, size_t len);
/*
* Adjusts |*local_window_size_ptr|, |*recv_window_size_ptr|,
* |*recv_reduction_ptr| with |*delta_ptr| which is the
* WINDOW_UPDATE's window_size_increment sent from local side. If
* |delta| is strictly larger than |*recv_window_size_ptr|,
* |*local_window_size_ptr| is increased by delta -
* *recv_window_size_ptr. If |delta| is negative,
* |*local_window_size_ptr| is decreased by delta.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* NGHTTP2_ERR_FLOW_CONTROL
* local_window_size overflow or gets negative.
*/
int nghttp2_adjust_local_window_size(int32_t *local_window_size_ptr,
int32_t *recv_window_size_ptr,
int32_t *recv_reduction_ptr,
int32_t *delta_ptr);
/*
* Returns non-zero if the function decided that WINDOW_UPDATE should
* be sent.
*/
int nghttp2_should_send_window_update(int32_t local_window_size,
int32_t recv_window_size);
/*
* Deallocates memory space pointed by |ptr|. This function exists for
* the application to free the memory space allocated by the library
* functions. Currently this function is hidden from the public API,
* but may be exposed as public API.
*/
void nghttp2_free(void *ptr);
/*
* Copies the buffer |src| of length |len| to the destination pointed
* by the |dest|, assuming that the |dest| is at lest |len| bytes long
* . Returns dest + len.
*/
uint8_t* nghttp2_cpymem(uint8_t *dest, const void *src, size_t len);
#endif /* NGHTTP2_HELPER_H */
|
