1 /*
2  * Copyright 2019, The Android Open Source Project
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 
17 #pragma once
18 
19 #include <netinet/in.h>
20 
21 #ifdef __cplusplus
22 extern "C" {
23 #endif
24 
25 struct ipv6Monitor;
26 
27 // A callback for when the IPv6 configuration changes.
28 typedef void (*ipv6MonitorCallback)(const struct in6_addr* /*gateway*/,
29                                     const struct in6_addr* /*dns servers*/,
30                                     size_t /*number of dns servers */);
31 
32 // Create an IPv6 monitor that will monitor |interfaceName| for IPv6 router
33 // advertisements. The monitor will trigger a callback if the gateway and/or
34 // DNS servers provided by router advertisements change at any point.
35 struct ipv6Monitor* ipv6MonitorCreate(const char* interfaceName);
36 void ipv6MonitorFree(struct ipv6Monitor* monitor);
37 
38 void ipv6MonitorSetCallback(struct ipv6Monitor* monitor,
39                             ipv6MonitorCallback callback);
40 void ipv6MonitorRunAsync(struct ipv6Monitor* monitor);
41 void ipv6MonitorStop(struct ipv6Monitor* monitor);
42 
43 #ifdef __cplusplus
44 } // extern "C"
45 #endif
46 
47 
48