1 /*
2 * Copyright (c) 2020, The OpenThread Authors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /**
30 * @file
31 * The file implements DUA routing functionalities.
32 */
33
34 #include "backbone_router/dua_routing_manager.hpp"
35
36 #if OTBR_ENABLE_DUA_ROUTING
37
38 #include "common/code_utils.hpp"
39
40 namespace otbr {
41
42 namespace BackboneRouter {
43
Enable(const Ip6Prefix & aDomainPrefix)44 void DuaRoutingManager::Enable(const Ip6Prefix &aDomainPrefix)
45 {
46 VerifyOrExit(!mEnabled);
47 mEnabled = true;
48
49 mDomainPrefix = aDomainPrefix;
50
51 AddDefaultRouteToThread();
52 AddPolicyRouteToBackbone();
53
54 exit:
55 otbrLogResult(OTBR_ERROR_NONE, "DuaRoutingManager: %s", __FUNCTION__);
56 }
57
Disable(void)58 void DuaRoutingManager::Disable(void)
59 {
60 VerifyOrExit(mEnabled);
61 mEnabled = false;
62
63 DelDefaultRouteToThread();
64 DelPolicyRouteToBackbone();
65
66 exit:
67 otbrLogResult(OTBR_ERROR_NONE, "DuaRoutingManager: %s", __FUNCTION__);
68 }
69
AddDefaultRouteToThread(void)70 void DuaRoutingManager::AddDefaultRouteToThread(void)
71 {
72 SystemUtils::ExecuteCommand("ip -6 route add %s dev %s proto static metric 1", mDomainPrefix.ToString().c_str(),
73 mInterfaceName.c_str());
74 }
75
DelDefaultRouteToThread(void)76 void DuaRoutingManager::DelDefaultRouteToThread(void)
77 {
78 SystemUtils::ExecuteCommand("ip -6 route del %s dev %s proto static metric 1", mDomainPrefix.ToString().c_str(),
79 mInterfaceName.c_str());
80 }
81
AddPolicyRouteToBackbone(void)82 void DuaRoutingManager::AddPolicyRouteToBackbone(void)
83 {
84 // Packets from Thread interface use route table "openthread"
85 SystemUtils::ExecuteCommand("ip -6 rule add iif %s table openthread", mInterfaceName.c_str());
86 SystemUtils::ExecuteCommand("ip -6 route add %s dev %s proto static table openthread",
87 mDomainPrefix.ToString().c_str(), mBackboneInterfaceName.c_str());
88 }
89
DelPolicyRouteToBackbone(void)90 void DuaRoutingManager::DelPolicyRouteToBackbone(void)
91 {
92 SystemUtils::ExecuteCommand("ip -6 rule del iif %s table openthread", mInterfaceName.c_str());
93 SystemUtils::ExecuteCommand("ip -6 route del %s dev %s proto static table openthread",
94 mDomainPrefix.ToString().c_str(), mBackboneInterfaceName.c_str());
95 }
96
97 } // namespace BackboneRouter
98 } // namespace otbr
99
100 #endif // OTBR_ENABLE_DUA_ROUTING
101