| /* |
| * Copyright (c) 2016, 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 the PAN ID Query Server. |
| */ |
| |
| #include "panid_query_server.hpp" |
| |
| #include "coap/coap_message.hpp" |
| #include "common/as_core_type.hpp" |
| #include "common/code_utils.hpp" |
| #include "common/debug.hpp" |
| #include "common/instance.hpp" |
| #include "common/locator_getters.hpp" |
| #include "common/log.hpp" |
| #include "meshcop/meshcop.hpp" |
| #include "meshcop/meshcop_tlvs.hpp" |
| #include "thread/thread_netif.hpp" |
| #include "thread/uri_paths.hpp" |
| |
| namespace ot { |
| |
| RegisterLogModule("MeshCoP"); |
| |
| PanIdQueryServer::PanIdQueryServer(Instance &aInstance) |
| : InstanceLocator(aInstance) |
| , mChannelMask(0) |
| , mPanId(Mac::kPanIdBroadcast) |
| , mTimer(aInstance, PanIdQueryServer::HandleTimer) |
| , mPanIdQuery(UriPath::kPanIdQuery, &PanIdQueryServer::HandleQuery, this) |
| { |
| Get<Tmf::Agent>().AddResource(mPanIdQuery); |
| } |
| |
| void PanIdQueryServer::HandleQuery(void *aContext, otMessage *aMessage, const otMessageInfo *aMessageInfo) |
| { |
| static_cast<PanIdQueryServer *>(aContext)->HandleQuery(AsCoapMessage(aMessage), AsCoreType(aMessageInfo)); |
| } |
| |
| void PanIdQueryServer::HandleQuery(Coap::Message &aMessage, const Ip6::MessageInfo &aMessageInfo) |
| { |
| uint16_t panId; |
| Ip6::MessageInfo responseInfo(aMessageInfo); |
| uint32_t mask; |
| |
| VerifyOrExit(aMessage.IsPostRequest()); |
| VerifyOrExit((mask = MeshCoP::ChannelMaskTlv::GetChannelMask(aMessage)) != 0); |
| |
| SuccessOrExit(Tlv::Find<MeshCoP::PanIdTlv>(aMessage, panId)); |
| |
| mChannelMask = mask; |
| mCommissioner = aMessageInfo.GetPeerAddr(); |
| mPanId = panId; |
| mTimer.Start(kScanDelay); |
| |
| if (aMessage.IsConfirmable() && !aMessageInfo.GetSockAddr().IsMulticast()) |
| { |
| SuccessOrExit(Get<Tmf::Agent>().SendEmptyAck(aMessage, responseInfo)); |
| LogInfo("sent panid query response"); |
| } |
| |
| exit: |
| return; |
| } |
| |
| void PanIdQueryServer::HandleScanResult(Mac::ActiveScanResult *aScanResult, void *aContext) |
| { |
| static_cast<PanIdQueryServer *>(aContext)->HandleScanResult(aScanResult); |
| } |
| |
| void PanIdQueryServer::HandleScanResult(Mac::ActiveScanResult *aScanResult) |
| { |
| if (aScanResult != nullptr) |
| { |
| if (aScanResult->mPanId == mPanId) |
| { |
| mChannelMask |= 1 << aScanResult->mChannel; |
| } |
| } |
| else if (mChannelMask != 0) |
| { |
| SendConflict(); |
| } |
| } |
| |
| void PanIdQueryServer::SendConflict(void) |
| { |
| Error error = kErrorNone; |
| MeshCoP::ChannelMaskTlv channelMask; |
| Tmf::MessageInfo messageInfo(GetInstance()); |
| Coap::Message * message; |
| |
| message = Get<Tmf::Agent>().NewPriorityConfirmablePostMessage(UriPath::kPanIdConflict); |
| VerifyOrExit(message != nullptr, error = kErrorNoBufs); |
| |
| channelMask.Init(); |
| channelMask.SetChannelMask(mChannelMask); |
| SuccessOrExit(error = channelMask.AppendTo(*message)); |
| |
| SuccessOrExit(error = Tlv::Append<MeshCoP::PanIdTlv>(*message, mPanId)); |
| |
| messageInfo.SetSockAddrToRlocPeerAddrTo(mCommissioner); |
| |
| SuccessOrExit(error = Get<Tmf::Agent>().SendMessage(*message, messageInfo)); |
| |
| LogInfo("sent panid conflict"); |
| |
| exit: |
| FreeMessageOnError(message, error); |
| MeshCoP::LogError("send panid conflict", error); |
| } |
| |
| void PanIdQueryServer::HandleTimer(Timer &aTimer) |
| { |
| aTimer.Get<PanIdQueryServer>().HandleTimer(); |
| } |
| |
| void PanIdQueryServer::HandleTimer(void) |
| { |
| IgnoreError(Get<Mac::Mac>().ActiveScan(mChannelMask, 0, HandleScanResult, this)); |
| mChannelMask = 0; |
| } |
| |
| } // namespace ot |