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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
/*-
* Copyright (c) 2005 Michael Bushkov <bushman@rsu.ru>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef __NSCD_PROTOCOL_H__
#define __NSCD_PROTOCOL_H__
/* maximum buffer size to receive - larger buffers are not allowed */
#define MAX_BUFFER_SIZE (1 << 20)
/* buffer size correctness checking routine */
#define BUFSIZE_CORRECT(x) (((x) > 0) && ((x) < MAX_BUFFER_SIZE))
#define BUFSIZE_INVALID(x) (!BUFSIZE_CORRECT(x))
/* structures below represent the data that are sent/received by the daemon */
struct cache_write_request
{
char *entry;
char *cache_key;
char *data;
size_t entry_length;
size_t cache_key_size;
size_t data_size;
};
struct cache_write_response
{
int error_code;
};
struct cache_read_request
{
char *entry;
char *cache_key;
size_t entry_length;
size_t cache_key_size;
};
struct cache_read_response
{
char *data; // ignored if error_code is not 0
size_t data_size; // ignored if error_code is not 0
int error_code;
};
enum transformation_type {
TT_USER = 0, // tranform only the entries of the caller
TT_ALL = 1 // transform all entries
};
struct cache_transform_request
{
char *entry; // ignored if entry_length is 0
size_t entry_length;
int transformation_type;
};
struct cache_transform_response
{
int error_code;
};
struct cache_mp_write_session_request {
char *entry;
size_t entry_length;
};
struct cache_mp_write_session_response {
int error_code;
};
struct cache_mp_write_session_write_request {
char *data;
size_t data_size;
};
struct cache_mp_write_session_write_response {
int error_code;
};
struct cache_mp_read_session_request {
char *entry;
size_t entry_length;
};
struct cache_mp_read_session_response {
int error_code;
};
struct cache_mp_read_session_read_response {
char *data;
size_t data_size;
int error_code;
};
enum comm_element_t {
CET_UNDEFINED = 0,
CET_WRITE_REQUEST = 1,
CET_WRITE_RESPONSE = 2,
CET_READ_REQUEST = 3,
CET_READ_RESPONSE = 4,
CET_TRANSFORM_REQUEST = 5,
CET_TRANSFORM_RESPONSE = 6,
CET_MP_WRITE_SESSION_REQUEST = 7,
CET_MP_WRITE_SESSION_RESPONSE = 8,
CET_MP_WRITE_SESSION_WRITE_REQUEST = 9,
CET_MP_WRITE_SESSION_WRITE_RESPONSE = 10,
CET_MP_WRITE_SESSION_CLOSE_NOTIFICATION = 11,
CET_MP_WRITE_SESSION_ABANDON_NOTIFICATION = 12,
CET_MP_READ_SESSION_REQUEST = 13,
CET_MP_READ_SESSION_RESPONSE = 14,
CET_MP_READ_SESSION_READ_REQUEST = 15,
CET_MP_READ_SESSION_READ_RESPONSE = 16,
CET_MP_READ_SESSION_CLOSE_NOTIFICATION = 17,
CET_MAX = 18
};
/*
* The comm_element is used as the holder of any known (defined above) data
* type that is to be sent/received.
*/
struct comm_element
{
union {
struct cache_write_request c_write_request;
struct cache_write_response c_write_response;
struct cache_read_request c_read_request;
struct cache_read_response c_read_response;
struct cache_transform_request c_transform_request;
struct cache_transform_response c_transform_response;
struct cache_mp_write_session_request c_mp_ws_request;
struct cache_mp_write_session_response c_mp_ws_response;
struct cache_mp_write_session_write_request c_mp_ws_write_request;
struct cache_mp_write_session_write_response c_mp_ws_write_response;
struct cache_mp_read_session_request c_mp_rs_request;
struct cache_mp_read_session_response c_mp_rs_response;
struct cache_mp_read_session_read_response c_mp_rs_read_response;
};
enum comm_element_t type;
};
extern void init_comm_element(struct comm_element *, enum comm_element_t type);
extern void finalize_comm_element(struct comm_element *);
/*
* For each type of data, there is three functions (init/finalize/get), that
* used with comm_element structure
*/
extern void init_cache_write_request(struct cache_write_request *);
extern void finalize_cache_write_request(struct cache_write_request *);
extern struct cache_write_request *get_cache_write_request(
struct comm_element *);
extern void init_cache_write_response(struct cache_write_response *);
extern void finalize_cache_write_response(struct cache_write_response *);
extern struct cache_write_response *get_cache_write_response(
struct comm_element *);
extern void init_cache_read_request(struct cache_read_request *);
extern void finalize_cache_read_request(struct cache_read_request *);
extern struct cache_read_request *get_cache_read_request(
struct comm_element *);
extern void init_cache_read_response(struct cache_read_response *);
extern void finalize_cache_read_response(struct cache_read_response *);
extern struct cache_read_response *get_cache_read_response(
struct comm_element *);
extern void init_cache_transform_request(struct cache_transform_request *);
extern void finalize_cache_transform_request(struct cache_transform_request *);
extern struct cache_transform_request *get_cache_transform_request(
struct comm_element *);
extern void init_cache_transform_response(struct cache_transform_response *);
extern void finalize_cache_transform_response(
struct cache_transform_response *);
extern struct cache_transform_response *get_cache_transform_response(
struct comm_element *);
extern void init_cache_mp_write_session_request(
struct cache_mp_write_session_request *);
extern void finalize_cache_mp_write_session_request(
struct cache_mp_write_session_request *);
extern struct cache_mp_write_session_request *
get_cache_mp_write_session_request(
struct comm_element *);
extern void init_cache_mp_write_session_response(
struct cache_mp_write_session_response *);
extern void finalize_cache_mp_write_session_response(
struct cache_mp_write_session_response *);
extern struct cache_mp_write_session_response *
get_cache_mp_write_session_response(struct comm_element *);
extern void init_cache_mp_write_session_write_request(
struct cache_mp_write_session_write_request *);
extern void finalize_cache_mp_write_session_write_request(
struct cache_mp_write_session_write_request *);
extern struct cache_mp_write_session_write_request *
get_cache_mp_write_session_write_request(struct comm_element *);
extern void init_cache_mp_write_session_write_response(
struct cache_mp_write_session_write_response *);
extern void finalize_cache_mp_write_session_write_response(
struct cache_mp_write_session_write_response *);
extern struct cache_mp_write_session_write_response *
get_cache_mp_write_session_write_response(struct comm_element *);
extern void init_cache_mp_read_session_request(
struct cache_mp_read_session_request *);
extern void finalize_cache_mp_read_session_request(
struct cache_mp_read_session_request *);
extern struct cache_mp_read_session_request *get_cache_mp_read_session_request(
struct comm_element *);
extern void init_cache_mp_read_session_response(
struct cache_mp_read_session_response *);
extern void finalize_cache_mp_read_session_response(
struct cache_mp_read_session_response *);
extern struct cache_mp_read_session_response *
get_cache_mp_read_session_response(
struct comm_element *);
extern void init_cache_mp_read_session_read_response(
struct cache_mp_read_session_read_response *);
extern void finalize_cache_mp_read_session_read_response(
struct cache_mp_read_session_read_response *);
extern struct cache_mp_read_session_read_response *
get_cache_mp_read_session_read_response(struct comm_element *);
#endif
|