1 /*
2 * Copyright 2011 Daniel Drown
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *
16 * config.h - configuration settings
17 */
18 #ifndef __CONFIG_H__
19 #define __CONFIG_H__
20
21 #include <linux/if.h>
22 #include <netinet/in.h>
23
24 struct tun_data {
25 char device4[IFNAMSIZ];
26 int read_fd6, write_fd6, fd4;
27 };
28
29 struct clat_config {
30 struct in6_addr ipv6_local_subnet;
31 struct in_addr ipv4_local_subnet;
32 struct in6_addr plat_subnet;
33 const char *native_ipv6_interface;
34 };
35
36 extern struct clat_config Global_Clatd_Config;
37
38 /* function: ipv6_prefix_equal
39 * compares the /64 prefixes of two ipv6 addresses.
40 * a1 - first address
41 * a2 - second address
42 * returns: 0 if the subnets are different, 1 if they are the same.
43 */
ipv6_prefix_equal(struct in6_addr * a1,struct in6_addr * a2)44 static inline int ipv6_prefix_equal(struct in6_addr *a1, struct in6_addr *a2) {
45 return !memcmp(a1, a2, 8);
46 }
47
48 #endif /* __CONFIG_H__ */
49