1/*
2 * Copyright (C) 2017 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#pragma once
17
18#include <stdint.h>
19
20#include <netinet/in.h>
21
22#include "socket.h"
23
24class Router {
25public:
26    // Initialize the router, this has to be called before any other methods can
27    // be called. It only needs to be called once.
28    bool init();
29
30    // Indicate that |address| is a neighbor to this node and that it is
31    // accessible on the interface with index |interfaceIndex|.
32    bool addNeighbor(const struct in6_addr& address, uint32_t interfaceIndex);
33
34    // Add a route to |address|/|bits| on interface |interfaceIndex|. The
35    // |bits| parameter indicates the bitmask of the address, for example in
36    // the routing entry 2001:db8::/32 the |bits| parameter would be 32.
37    bool addRoute(const struct in6_addr& address,
38                  uint8_t bits,
39                  uint32_t interfaceIndex);
40
41    // Set the default gateway route to |address| on interface with index
42    // |interfaceIndex|. Overwrites any existing default gateway with the same
43    // address.
44    bool setDefaultGateway(const struct in6_addr& address,
45                           unsigned int interfaceIndex);
46private:
47    bool sendNetlinkMessage(const void* data, size_t size);
48
49    // Netlink socket for setting up neighbors and routes
50    Socket mSocket;
51};
52
53