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
|
/*
Unix SMB/CIFS implementation.
Little dictionary style data structure based on dbwrap_rbt
Copyright (C) Volker Lendecke 2009
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "dbwrap.h"
#include "talloc_dict.h"
#include "util_tdb.h"
struct talloc_dict {
struct db_context *db;
};
struct talloc_dict *talloc_dict_init(TALLOC_CTX *mem_ctx)
{
struct talloc_dict *result;
result = talloc(mem_ctx, struct talloc_dict);
if (result == NULL) {
return NULL;
}
result->db = db_open_rbt(result);
if (result->db == NULL) {
TALLOC_FREE(result);
return NULL;
}
return result;
}
/*
* Add a talloced object to the dict. Nulls out the pointer to indicate that
* the talloc ownership has been taken. If an object for "key" already exists,
* the existing object is talloc_free()ed and overwritten by the new
* object. If "data" is NULL, object for key "key" is deleted. Return false
* for "no memory".
*/
bool talloc_dict_set(struct talloc_dict *dict, DATA_BLOB key, void *pdata)
{
struct db_record *rec;
NTSTATUS status = NT_STATUS_OK;
void *data = *(void **)pdata;
rec = dict->db->fetch_locked(dict->db, talloc_tos(),
make_tdb_data(key.data, key.length));
if (rec == NULL) {
return false;
}
if (rec->value.dsize != 0) {
void *old_data;
if (rec->value.dsize != sizeof(void *)) {
TALLOC_FREE(rec);
return false;
}
old_data = *(void **)(rec->value.dptr);
TALLOC_FREE(old_data);
if (data == NULL) {
status = rec->delete_rec(rec);
}
}
if (data != NULL) {
void *mydata = talloc_move(dict->db, &data);
*(void **)pdata = NULL;
status = rec->store(rec, make_tdb_data((uint8_t *)&mydata,
sizeof(mydata)), 0);
}
TALLOC_FREE(rec);
return NT_STATUS_IS_OK(status);
}
/*
* Fetch a talloced object. If "mem_ctx!=NULL", talloc_move the object there
* and delete it from the dict.
*/
void *talloc_dict_fetch(struct talloc_dict *dict, DATA_BLOB key,
TALLOC_CTX *mem_ctx)
{
struct db_record *rec;
void *result;
rec = dict->db->fetch_locked(dict->db, talloc_tos(),
make_tdb_data(key.data, key.length));
if (rec == NULL) {
return NULL;
}
if (rec->value.dsize != sizeof(void *)) {
TALLOC_FREE(rec);
return NULL;
}
result = *(void **)rec->value.dptr;
if (mem_ctx != NULL) {
NTSTATUS status;
status = rec->delete_rec(rec);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(rec);
return NULL;
}
result = talloc_move(mem_ctx, &result);
}
return result;
}
struct talloc_dict_traverse_state {
int (*fn)(DATA_BLOB key, void *data, void *private_data);
void *private_data;
};
static int talloc_dict_traverse_fn(struct db_record *rec, void *private_data)
{
struct talloc_dict_traverse_state *state =
(struct talloc_dict_traverse_state *)private_data;
if (rec->value.dsize != sizeof(void *)) {
return -1;
}
return state->fn(data_blob_const(rec->key.dptr, rec->key.dsize),
*(void **)rec->value.dptr, state->private_data);
}
/*
* Traverse a talloc_dict. If "fn" returns non-null, quit the traverse
*/
int talloc_dict_traverse(struct talloc_dict *dict,
int (*fn)(DATA_BLOB key, void *data,
void *private_data),
void *private_data)
{
struct talloc_dict_traverse_state state;
state.fn = fn;
state.private_data = private_data;
return dict->db->traverse(dict->db, talloc_dict_traverse_fn, &state);
}
|
