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
|
/**
* @file local_connection_store.c
*
* @brief Implementation of local_connection_store_t.
*
*/
/*
* Copyright (C) 2006 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* 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 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#include <string.h>
#include "local_connection_store.h"
#include <daemon.h>
#include <utils/linked_list.h>
typedef struct private_local_connection_store_t private_local_connection_store_t;
/**
* Private data of an local_connection_store_t object
*/
struct private_local_connection_store_t {
/**
* Public part
*/
local_connection_store_t public;
/**
* stored connection
*/
linked_list_t *connections;
/**
* Mutex to exclusivly access connection list
*/
pthread_mutex_t mutex;
};
/**
* Implementation of connection_store_t.get_connection_by_hosts.
*/
static connection_t *get_connection_by_hosts(private_local_connection_store_t *this, host_t *my_host, host_t *other_host)
{
typedef enum {
PRIO_UNDEFINED= 0x00,
PRIO_ADDR_ANY= 0x01,
PRIO_ADDR_MATCH= 0x02
} prio_t;
prio_t best_prio = PRIO_UNDEFINED;
iterator_t *iterator;
connection_t *candidate;
connection_t *found = NULL;
DBG2(DBG_CFG, "looking for connection for host pair %H...%H",
my_host, other_host);
pthread_mutex_lock(&(this->mutex));
iterator = this->connections->create_iterator(this->connections, TRUE);
/* determine closest matching connection */
while (iterator->iterate(iterator, (void**)&candidate))
{
host_t *candidate_my_host;
host_t *candidate_other_host;
candidate_my_host = candidate->get_my_host(candidate);
candidate_other_host = candidate->get_other_host(candidate);
/* my_host addresses must match*/
if (my_host->ip_equals(my_host, candidate_my_host))
{
prio_t prio = PRIO_UNDEFINED;
/* exact match of peer host address or wildcard address? */
if (other_host->ip_equals(other_host, candidate_other_host))
{
prio |= PRIO_ADDR_MATCH;
}
else if (candidate_other_host->is_anyaddr(candidate_other_host))
{
prio |= PRIO_ADDR_ANY;
}
DBG2(DBG_CFG, "candidate connection \"%s\": %H...%H (prio=%d)",
candidate->get_name(candidate),
candidate_my_host, candidate_other_host, prio);
if (prio > best_prio)
{
found = candidate;
best_prio = prio;
}
}
}
iterator->destroy(iterator);
if (found)
{
DBG2(DBG_CFG, "found matching connection \"%s\": %H...%H (prio=%d)",
found->get_name(found), found->get_my_host(found),
found->get_other_host(found), best_prio);
/* give out a new reference to it */
found->get_ref(found);
}
pthread_mutex_unlock(&(this->mutex));
return found;
}
/**
* Implementation of connection_store_t.get_connection_by_name.
*/
static connection_t *get_connection_by_name(private_local_connection_store_t *this, char *name)
{
iterator_t *iterator;
connection_t *current, *found = NULL;
pthread_mutex_lock(&(this->mutex));
iterator = this->connections->create_iterator(this->connections, TRUE);
while (iterator->iterate(iterator, (void**)¤t))
{
if (strcmp(name, current->get_name(current)) == 0)
{
found = current;
break;
}
}
iterator->destroy(iterator);
pthread_mutex_unlock(&(this->mutex));
if (found)
{
/* get a new reference for it */
found->get_ref(found);
}
return found;
}
/**
* Implementation of connection_store_t.delete_connection.
*/
static status_t delete_connection(private_local_connection_store_t *this, char *name)
{
iterator_t *iterator;
connection_t *current;
bool found = FALSE;
pthread_mutex_lock(&(this->mutex));
iterator = this->connections->create_iterator(this->connections, TRUE);
while (iterator->iterate(iterator, (void **)¤t))
{
if (strcmp(current->get_name(current), name) == 0)
{
/* remove connection from list, and destroy it */
iterator->remove(iterator);
current->destroy(current);
found = TRUE;
break;
}
}
iterator->destroy(iterator);
pthread_mutex_unlock(&(this->mutex));
if (found)
{
return SUCCESS;
}
return NOT_FOUND;
}
/**
* Implementation of connection_store_t.add_connection.
*/
static status_t add_connection(private_local_connection_store_t *this, connection_t *connection)
{
pthread_mutex_lock(&(this->mutex));
this->connections->insert_last(this->connections, connection);
pthread_mutex_unlock(&(this->mutex));
return SUCCESS;
}
/**
* Implementation of connection_store_t.create_iterator.
*/
static iterator_t* create_iterator(private_local_connection_store_t *this)
{
return this->connections->create_iterator_locked(this->connections,
&this->mutex);
}
/**
* Implementation of connection_store_t.destroy.
*/
static void destroy (private_local_connection_store_t *this)
{
pthread_mutex_lock(&(this->mutex));
this->connections->destroy_offset(this->connections, offsetof(connection_t, destroy));
pthread_mutex_unlock(&(this->mutex));
free(this);
}
/**
* Described in header.
*/
local_connection_store_t * local_connection_store_create(void)
{
private_local_connection_store_t *this = malloc_thing(private_local_connection_store_t);
this->public.connection_store.get_connection_by_hosts = (connection_t*(*)(connection_store_t*,host_t*,host_t*))get_connection_by_hosts;
this->public.connection_store.get_connection_by_name = (connection_t*(*)(connection_store_t*,char*))get_connection_by_name;
this->public.connection_store.delete_connection = (status_t(*)(connection_store_t*,char*))delete_connection;
this->public.connection_store.add_connection = (status_t(*)(connection_store_t*,connection_t*))add_connection;
this->public.connection_store.create_iterator = (iterator_t*(*)(connection_store_t*))create_iterator;
this->public.connection_store.destroy = (void(*)(connection_store_t*))destroy;
/* private variables */
this->connections = linked_list_create();
pthread_mutex_init(&(this->mutex), NULL);
return (&this->public);
}
|
