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
|
/*
* $Id: rule.c,v 1.1.1.1 2005/06/13 16:47:43 bogdan_iancu Exp $
*
* PERMISSIONS module
*
* Copyright (C) 2003 Mikls Tirpk (mtirpak@sztaki.hu)
*
* This file is part of openser, a free SIP server.
*
* openser 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 2 of the License, or
* (at your option) any later version
*
* openser 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <regex.h>
#include "../../mem/mem.h"
#include "../../sr_module.h"
#include "../../mem/mem.h"
#include "rule.h"
/*
* allocate memory for a new rule
*/
rule *new_rule(void)
{
rule *r;
r = (rule *)pkg_malloc(sizeof(rule));
if (!r) {
LOG(L_ERR, "permissions:new_rule(): Not enough memory\n");
return 0;
}
memset(r, 0, sizeof(rule));
return r;
}
/*
* free memory allocated by a rule
*/
void free_rule(rule *r)
{
if (!r) return;
if (r->left) free_expression(r->left);
if (r->left_exceptions) free_expression(r->left_exceptions);
if (r->right) free_expression(r->right);
if (r->right_exceptions) free_expression(r->right_exceptions);
if (r->next) free_rule(r->next);
pkg_free(r);
}
/*
* list rules
*/
void print_rule(rule *r)
{
if (!r) return;
printf("\nNEW RULE:\n");
printf("\n\tLEFT: ");
if (r->left) print_expression(r->left); else printf("ALL");
if (r->left_exceptions) {
printf("\n\tLEFT EXCEPTIONS: ");
print_expression(r->left_exceptions);
}
printf("\n\tRIGHT: ");
if (r->right) print_expression(r->right); else printf("ALL");
if (r->right_exceptions) {
printf("\n\tRIGHT EXCEPTIONS: ");
print_expression(r->right_exceptions);
}
printf("\n");
if (r->next) print_rule(r->next);
}
/*
* look for a proper rule matching with left:right
*/
int search_rule(rule *r, char *left, char *right)
{
rule *r1;
r1 = r;
while (r1) {
if (( (!r->left) || (search_expression(r1->left, left)) )
&& (!search_expression(r1->left_exceptions, left))
&& ( (!r1->right) || (search_expression(r1->right, right)) )
&& (!search_expression(r1->right_exceptions, right))) return 1;
r1 = r1->next;
}
return 0;
}
/*
* allocate memory for a new expression
* str is saved in vale, and compiled to POSIX regexp (reg_value)
*/
expression *new_expression(char *str)
{
expression *e;
if (!str) return 0;
e = (expression *)pkg_malloc(sizeof(expression));
if (!e) {
LOG(L_ERR, "permissions:new_expression(): Not enough memory\n");
return 0;
}
strcpy(e->value, str);
e->reg_value = (regex_t*)pkg_malloc(sizeof(regex_t));
if (!e->reg_value) {
LOG(L_ERR, "permissions:new_expression(): Not enough memory\n");
pkg_free(e);
return 0;
}
if (regcomp(e->reg_value, str, REG_EXTENDED|REG_NOSUB|REG_ICASE) ) {
LOG(L_ERR, "permissions:new_expression(): Bad regular expression: %s\n", str);
pkg_free(e->reg_value);
pkg_free(e);
return NULL;
}
e->next = 0;
return e;
}
/*
* free memory allocated by an expression
*/
void free_expression(expression *e)
{
if (!e) return;
if (e->next) free_expression(e->next);
regfree(e->reg_value);
pkg_free(e);
}
/*
* list expressions
*/
void print_expression(expression *e)
{
if (!e) return;
printf("%s, ", e->value);
if (e->next) print_expression(e->next);
}
/*
* look for matching expression
*/
int search_expression(expression *e, char *value)
{
expression *e1;
e1 = e;
while (e1) {
if (regexec(e1->reg_value, value, 0, 0, 0) == 0) return 1;
e1 = e1->next;
}
return 0;
}
|
