| /* |
| * Copyright (c) 2021, The OpenThread Authors. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holder nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** |
| * @file |
| * This file implements IPv6 Neighbor Discovery Agent. |
| */ |
| |
| #include "nd_agent.hpp" |
| |
| #if OPENTHREAD_CONFIG_NEIGHBOR_DISCOVERY_AGENT_ENABLE |
| |
| #include "common/as_core_type.hpp" |
| #include "common/locator_getters.hpp" |
| #include "thread/lowpan.hpp" |
| #include "thread/mle_router.hpp" |
| #include "thread/network_data_leader.hpp" |
| #include "thread/thread_netif.hpp" |
| |
| namespace ot { |
| namespace NeighborDiscovery { |
| |
| void Agent::UpdateService(void) |
| { |
| Error error; |
| uint16_t rloc16 = Get<Mle::MleRouter>().GetRloc16(); |
| NetworkData::Iterator iterator; |
| NetworkData::OnMeshPrefixConfig config; |
| Lowpan::Context lowpanContext; |
| |
| if (IsAlocInUse()) |
| { |
| uint8_t contextId = static_cast<uint8_t>(mAloc.GetAddress().GetIid().GetLocator() - |
| Mle::kAloc16NeighborDiscoveryAgentStart + 1); |
| bool found = false; |
| |
| iterator = NetworkData::kIteratorInit; |
| |
| while (Get<NetworkData::Leader>().GetNextOnMeshPrefix(iterator, rloc16, config) == kErrorNone) |
| { |
| if (!config.mNdDns) |
| { |
| continue; |
| } |
| |
| error = Get<NetworkData::Leader>().GetContext(AsCoreType(&config.mPrefix.mPrefix), lowpanContext); |
| |
| if ((error != kErrorNone) || (lowpanContext.mContextId != contextId)) |
| { |
| continue; |
| } |
| |
| found = true; |
| break; |
| } |
| |
| if (!found) |
| { |
| Get<ThreadNetif>().RemoveUnicastAddress(mAloc); |
| FreeAloc(); |
| } |
| } |
| |
| VerifyOrExit(!IsAlocInUse()); |
| |
| iterator = NetworkData::kIteratorInit; |
| |
| while (Get<NetworkData::Leader>().GetNextOnMeshPrefix(iterator, rloc16, config) == kErrorNone) |
| { |
| if (!config.mNdDns) |
| { |
| continue; |
| } |
| |
| error = Get<NetworkData::Leader>().GetContext(AsCoreType(&config.mPrefix.mPrefix), lowpanContext); |
| |
| if (error == kErrorNone) |
| { |
| uint16_t rloc = Mle::kAloc16NeighborDiscoveryAgentStart + lowpanContext.mContextId - 1; |
| |
| mAloc.InitAsThreadOrigin(); |
| mAloc.GetAddress().SetToAnycastLocator(Get<Mle::MleRouter>().GetMeshLocalPrefix(), rloc); |
| Get<ThreadNetif>().AddUnicastAddress(mAloc); |
| ExitNow(); |
| } |
| } |
| |
| exit: |
| return; |
| } |
| |
| void Agent::ApplyMeshLocalPrefix(void) |
| { |
| VerifyOrExit(IsAlocInUse()); |
| |
| Get<ThreadNetif>().RemoveUnicastAddress(mAloc); |
| mAloc.GetAddress().SetPrefix(Get<Mle::MleRouter>().GetMeshLocalPrefix()); |
| Get<ThreadNetif>().AddUnicastAddress(mAloc); |
| |
| exit: |
| return; |
| } |
| |
| } // namespace NeighborDiscovery |
| } // namespace ot |
| |
| #endif // OPENTHREAD_CONFIG_NEIGHBOR_DISCOVERY_AGENT_ENABLE |