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
|
/*
* Copyright (C) 2013 Martin Willi
* Copyright (C) 2013 revosec AG
*
* 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 "osx_attr_handler.h"
#include <networking/host.h>
#include <utils/debug.h>
#include <SystemConfiguration/SCDynamicStore.h>
typedef struct private_osx_attr_handler_t private_osx_attr_handler_t;
/**
* Private data of an osx_attr_handler_t object.
*/
struct private_osx_attr_handler_t {
/**
* Public interface
*/
osx_attr_handler_t public;
};
/**
* Create a path to the DNS configuration of the Primary IPv4 Service
*/
static CFStringRef create_dns_path(SCDynamicStoreRef store)
{
CFStringRef service, path = NULL;
CFDictionaryRef dict;
/* get primary service */
dict = SCDynamicStoreCopyValue(store, CFSTR("State:/Network/Global/IPv4"));
if (dict)
{
service = CFDictionaryGetValue(dict, CFSTR("PrimaryService"));
if (service)
{
path = CFStringCreateWithFormat(NULL, NULL,
CFSTR("State:/Network/Service/%@/DNS"), service);
}
else
{
DBG1(DBG_CFG, "SystemConfiguration PrimaryService not known");
}
CFRelease(dict);
}
else
{
DBG1(DBG_CFG, "getting global IPv4 SystemConfiguration failed");
}
return path;
}
/**
* Create a mutable dictionary from path, a new one if not found
*/
static CFMutableDictionaryRef get_dictionary(SCDynamicStoreRef store,
CFStringRef path)
{
CFDictionaryRef dict;
CFMutableDictionaryRef mut = NULL;
dict = SCDynamicStoreCopyValue(store, path);
if (dict)
{
if (CFGetTypeID(dict) == CFDictionaryGetTypeID())
{
mut = CFDictionaryCreateMutableCopy(NULL, 0, dict);
}
CFRelease(dict);
}
if (!mut)
{
mut = CFDictionaryCreateMutable(NULL, 0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
}
return mut;
}
/**
* Create a mutable array from dictionary path, a new one if not found
*/
static CFMutableArrayRef get_array_from_dict(CFDictionaryRef dict,
CFStringRef name)
{
CFArrayRef arr;
arr = CFDictionaryGetValue(dict, name);
if (arr && CFGetTypeID(arr) == CFArrayGetTypeID())
{
return CFArrayCreateMutableCopy(NULL, 0, arr);
}
return CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
}
/**
* Add/Remove a DNS server to the configuration
*/
static bool manage_dns(int family, chunk_t data, bool add)
{
SCDynamicStoreRef store;
CFStringRef path, dns;
CFMutableArrayRef arr;
CFMutableDictionaryRef dict;
CFIndex i;
host_t *server;
char buf[64];
bool success = FALSE;
server = host_create_from_chunk(family, data, 0);
if (!server)
{
return FALSE;
}
snprintf(buf, sizeof(buf), "%H", server);
server->destroy(server);
store = SCDynamicStoreCreate(NULL, CFSTR("osx-attr"), NULL, NULL);
path = create_dns_path(store);
if (path)
{
dict = get_dictionary(store, path);
arr = get_array_from_dict(dict, CFSTR("ServerAddresses"));
dns = CFStringCreateWithCString(NULL, buf, kCFStringEncodingUTF8);
if (add)
{
DBG1(DBG_CFG, "installing %s as DNS server", buf);
CFArrayInsertValueAtIndex(arr, 0, dns);
}
else
{
i = CFArrayGetFirstIndexOfValue(arr,
CFRangeMake(0, CFArrayGetCount(arr)), dns);
if (i >= 0)
{
DBG1(DBG_CFG, "removing %s from DNS servers (%d)", buf, i);
CFArrayRemoveValueAtIndex(arr, i);
}
}
CFRelease(dns);
CFDictionarySetValue(dict, CFSTR("ServerAddresses"), arr);
CFRelease(arr);
success = SCDynamicStoreSetValue(store, path, dict);
CFRelease(dict);
CFRelease(path);
}
CFRelease(store);
if (!success)
{
DBG1(DBG_CFG, "adding DNS server to SystemConfiguration failed");
}
return success;
}
METHOD(attribute_handler_t, handle, bool,
private_osx_attr_handler_t *this, ike_sa_t *ike_sa,
configuration_attribute_type_t type, chunk_t data)
{
switch (type)
{
case INTERNAL_IP4_DNS:
return manage_dns(AF_INET, data, TRUE);
default:
return FALSE;
}
}
METHOD(attribute_handler_t, release, void,
private_osx_attr_handler_t *this, ike_sa_t *ike_sa,
configuration_attribute_type_t type, chunk_t data)
{
switch (type)
{
case INTERNAL_IP4_DNS:
manage_dns(AF_INET, data, FALSE);
break;
default:
break;
}
}
METHOD(enumerator_t, enumerate_dns, bool,
enumerator_t *this, configuration_attribute_type_t *type, chunk_t *data)
{
*type = INTERNAL_IP4_DNS;
*data = chunk_empty;
/* stop enumeration */
this->enumerate = (void*)return_false;
return TRUE;
}
METHOD(attribute_handler_t, create_attribute_enumerator, enumerator_t *,
private_osx_attr_handler_t *this, ike_sa_t *ike_sa,
linked_list_t *vips)
{
enumerator_t *enumerator;
INIT(enumerator,
.enumerate = (void*)_enumerate_dns,
.destroy = (void*)free,
);
return enumerator;
}
METHOD(osx_attr_handler_t, destroy, void,
private_osx_attr_handler_t *this)
{
free(this);
}
/**
* See header
*/
osx_attr_handler_t *osx_attr_handler_create()
{
private_osx_attr_handler_t *this;
INIT(this,
.public = {
.handler = {
.handle = _handle,
.release = _release,
.create_attribute_enumerator = _create_attribute_enumerator,
},
.destroy = _destroy,
},
);
return &this->public;
}
|
