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
|
/*
* services/view.h - named views containing local zones authority service.
*
* Copyright (c) 2016, NLnet Labs. All rights reserved.
*
* This software is open source.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the NLNET LABS nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* HOLDER 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.
*/
/**
* \file
*
* This file contains functions to enable named views that can hold local zone
* authority service.
*/
#ifndef SERVICES_VIEW_H
#define SERVICES_VIEW_H
#include "util/rbtree.h"
#include "util/locks.h"
struct regional;
struct config_file;
struct config_view;
/**
* Views storage, shared.
*/
struct views {
/** lock on the view tree */
lock_rw_t lock;
/** rbtree of struct view */
rbtree_t vtree;
};
/**
* View. Named structure holding local authority zones.
*/
struct view {
/** rbtree node, key is name */
rbnode_t node;
/** view name.
* Has to be right after rbnode_t due to pointer arithmatic in
* view_create's lock protect */
char* name;
/** view specific local authority zones */
struct local_zones* local_zones;
/** Fallback to global local_zones when there is no match in the view
* specific tree. 1 for yes, 0 for no */
int isfirst;
/** lock on the data in the structure
* For the node and name you
* need to also hold the views_tree lock to change them (or to
* delete this view) */
lock_rw_t lock;
};
/**
* Create views storage
* @return new struct or NULL on error.
*/
struct views* views_create(void);
/**
* Delete views storage
* @param v: views to delete.
*/
void views_delete(struct views* v);
/**
* Apply config settings;
* Takes care of locking.
* @param v: view is set up.
* @param cfg: config data.
* @return false on error.
*/
int views_apply_cfg(struct views* v, struct config_file* cfg);
/**
* Compare two view entries in rbtree. Sort canonical.
* @param v1: view 1
* @param v2: view 2
* @return: negative, positive or 0 comparison value.
*/
int view_cmp(const void* v1, const void* v2);
/**
* Delete one view
* @param v: view to delete.
*/
void view_delete(struct view* v);
/**
* Debug helper. Print all views
* Takes care of locking.
* @param v: the views tree
*/
void views_print(struct views* v);
/* Find a view by name.
* @param vs: views
* @param name: name of the view we are looking for
* @param write: 1 for obtaining write lock on found view, 0 for read lock
* @return: locked view or NULL.
*/
struct view* views_find_view(struct views* vs, const char* name, int write);
#endif /* SERVICES_VIEW_H */
|
