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
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/* Copyright 2015 greenbytes GmbH (https://www.greenbytes.de)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __mod_h2__h2__
#define __mod_h2__h2__
/**
* The magic PRIamble of RFC 7540 that is always sent when starting
* a h2 communication.
*/
extern const char *H2_MAGIC_TOKEN;
#define H2_ERR_NO_ERROR (0x00)
#define H2_ERR_PROTOCOL_ERROR (0x01)
#define H2_ERR_INTERNAL_ERROR (0x02)
#define H2_ERR_FLOW_CONTROL_ERROR (0x03)
#define H2_ERR_SETTINGS_TIMEOUT (0x04)
#define H2_ERR_STREAM_CLOSED (0x05)
#define H2_ERR_FRAME_SIZE_ERROR (0x06)
#define H2_ERR_REFUSED_STREAM (0x07)
#define H2_ERR_CANCEL (0x08)
#define H2_ERR_COMPRESSION_ERROR (0x09)
#define H2_ERR_CONNECT_ERROR (0x0a)
#define H2_ERR_ENHANCE_YOUR_CALM (0x0b)
#define H2_ERR_INADEQUATE_SECURITY (0x0c)
#define H2_ERR_HTTP_1_1_REQUIRED (0x0d)
#define H2_HEADER_METHOD ":method"
#define H2_HEADER_METHOD_LEN 7
#define H2_HEADER_SCHEME ":scheme"
#define H2_HEADER_SCHEME_LEN 7
#define H2_HEADER_AUTH ":authority"
#define H2_HEADER_AUTH_LEN 10
#define H2_HEADER_PATH ":path"
#define H2_HEADER_PATH_LEN 5
#define H2_CRLF "\r\n"
/* Max data size to write so it fits inside a TLS record */
#define H2_DATA_CHUNK_SIZE ((16*1024) - 100 - 9)
/* Maximum number of padding bytes in a frame, rfc7540 */
#define H2_MAX_PADLEN 256
/* Initial default window size, RFC 7540 ch. 6.5.2 */
#define H2_INITIAL_WINDOW_SIZE ((64*1024)-1)
#define H2_STREAM_CLIENT_INITIATED(id) (id&0x01)
#define H2_ALEN(a) (sizeof(a)/sizeof((a)[0]))
#define H2MAX(x,y) ((x) > (y) ? (x) : (y))
#define H2MIN(x,y) ((x) < (y) ? (x) : (y))
typedef enum {
H2_DEPENDANT_AFTER,
H2_DEPENDANT_INTERLEAVED,
H2_DEPENDANT_BEFORE,
} h2_dependency;
typedef struct h2_priority {
h2_dependency dependency;
int weight;
} h2_priority;
typedef enum {
H2_PUSH_NONE,
H2_PUSH_DEFAULT,
H2_PUSH_HEAD,
H2_PUSH_FAST_LOAD,
} h2_push_policy;
typedef enum {
H2_STREAM_ST_IDLE,
H2_STREAM_ST_OPEN,
H2_STREAM_ST_RESV_LOCAL,
H2_STREAM_ST_RESV_REMOTE,
H2_STREAM_ST_CLOSED_INPUT,
H2_STREAM_ST_CLOSED_OUTPUT,
H2_STREAM_ST_CLOSED,
} h2_stream_state_t;
typedef enum {
H2_SESSION_ST_INIT, /* send initial SETTINGS, etc. */
H2_SESSION_ST_DONE, /* finished, connection close */
H2_SESSION_ST_IDLE, /* nothing to write, expecting data inc */
H2_SESSION_ST_BUSY, /* read/write without stop */
H2_SESSION_ST_WAIT, /* waiting for tasks reporting back */
} h2_session_state;
typedef struct h2_session_props {
int accepted_max; /* the highest remote stream id was/will be handled */
int completed_max; /* the highest remote stream completed */
int emitted_count; /* the number of local streams sent */
int emitted_max; /* the highest local stream id sent */
int error; /* the last session error encountered */
unsigned int accepting : 1; /* if the session is accepting new streams */
unsigned int shutdown : 1; /* if the final GOAWAY has been sent */
} h2_session_props;
/* h2_request is the transformer of HTTP2 streams into HTTP/1.1 internal
* format that will be fed to various httpd input filters to finally
* become a request_rec to be handled by soemone.
*/
typedef struct h2_request h2_request;
struct h2_request {
const char *method; /* pseudo header values, see ch. 8.1.2.3 */
const char *scheme;
const char *authority;
const char *path;
apr_table_t *headers;
apr_time_t request_time;
unsigned int chunked : 1; /* iff requst body needs to be forwarded as chunked */
unsigned int serialize : 1; /* iff this request is written in HTTP/1.1 serialization */
};
typedef struct h2_headers h2_headers;
struct h2_headers {
int status;
apr_table_t *headers;
apr_table_t *notes;
};
typedef apr_status_t h2_io_data_cb(void *ctx, const char *data, apr_off_t len);
typedef int h2_stream_pri_cmp(int stream_id1, int stream_id2, void *ctx);
/* Note key to attach connection task id to conn_rec/request_rec instances */
#define H2_TASK_ID_NOTE "http2-task-id"
#define H2_FILTER_DEBUG_NOTE "http2-debug"
#endif /* defined(__mod_h2__h2__) */
|
