| /* |
| * Copyright (c) 2016-2018, 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 AnnounceSender. |
| */ |
| |
| #include "announce_sender.hpp" |
| |
| #include <openthread/platform/radio.h> |
| |
| #include "common/code_utils.hpp" |
| #include "common/instance.hpp" |
| #include "common/locator_getters.hpp" |
| #include "common/log.hpp" |
| #include "common/random.hpp" |
| #include "meshcop/meshcop.hpp" |
| #include "meshcop/meshcop_tlvs.hpp" |
| #include "radio/radio.hpp" |
| |
| namespace ot { |
| |
| RegisterLogModule("AnnounceSender"); |
| |
| //--------------------------------------------------------------------------------------------------------------------- |
| // AnnounceSenderBase |
| |
| AnnounceSenderBase::AnnounceSenderBase(Instance &aInstance, Timer::Handler aHandler) |
| : InstanceLocator(aInstance) |
| , mPeriod(0) |
| , mJitter(0) |
| , mCount(0) |
| , mChannel(0) |
| , mStartingChannel(kChannelIteratorFirst) |
| , mTimer(aInstance, aHandler) |
| { |
| } |
| |
| void AnnounceSenderBase::SendAnnounce(uint8_t aCount) |
| { |
| if (IsRunning()) |
| { |
| mCount += aCount; |
| ExitNow(); |
| } |
| |
| VerifyOrExit((mPeriod != 0) && !mChannelMask.IsEmpty()); |
| |
| SelectStartingChannel(); |
| |
| mCount = aCount; |
| mChannel = mStartingChannel; |
| |
| mTimer.Start(Random::NonCrypto::GetUint32InRange(0, mJitter + 1)); |
| |
| exit: |
| return; |
| } |
| |
| void AnnounceSenderBase::Stop(void) |
| { |
| mTimer.Stop(); |
| mCount = 0; |
| } |
| |
| void AnnounceSenderBase::SetChannelMask(Mac::ChannelMask aChannelMask) |
| { |
| mChannelMask = aChannelMask; |
| mChannelMask.Intersect(Get<Mac::Mac>().GetSupportedChannelMask()); |
| |
| VerifyOrExit(!mChannelMask.IsEmpty(), Stop()); |
| SelectStartingChannel(); |
| |
| exit: |
| return; |
| } |
| |
| void AnnounceSenderBase::SetStartingChannel(uint8_t aStartingChannel) |
| { |
| mStartingChannel = aStartingChannel; |
| SelectStartingChannel(); |
| } |
| |
| void AnnounceSenderBase::SelectStartingChannel(void) |
| { |
| // If the starting channel is not set or it is not present |
| // in the channel mask, then start from the first channel |
| // in the mask. |
| |
| VerifyOrExit(!mChannelMask.IsEmpty()); |
| VerifyOrExit((mStartingChannel == kChannelIteratorFirst) || !mChannelMask.ContainsChannel(mStartingChannel)); |
| |
| mStartingChannel = kChannelIteratorFirst; |
| IgnoreError(mChannelMask.GetNextChannel(mStartingChannel)); |
| |
| exit: |
| return; |
| } |
| |
| void AnnounceSenderBase::HandleTimer(void) |
| { |
| Get<Mle::MleRouter>().SendAnnounce(mChannel); |
| |
| // Go to the next channel in the mask. If we have reached the end |
| // of the channel mask, we start over from the first channel in |
| // the mask. Once we get back to `mStartingChannel` we have |
| // finished one full cycle and can decrement `mCount`. |
| |
| while (mChannelMask.GetNextChannel(mChannel) != kErrorNone) |
| { |
| mChannel = kChannelIteratorFirst; |
| } |
| |
| if ((mChannel == mStartingChannel) && (mCount != 0)) |
| { |
| mCount--; |
| VerifyOrExit(mCount != 0); |
| } |
| |
| mTimer.Start(Random::NonCrypto::AddJitter(mPeriod, mJitter)); |
| |
| exit: |
| return; |
| } |
| |
| //--------------------------------------------------------------------------------------------------------------------- |
| // AnnounceSender |
| |
| #if OPENTHREAD_CONFIG_ANNOUNCE_SENDER_ENABLE |
| |
| AnnounceSender::AnnounceSender(Instance &aInstance) |
| : AnnounceSenderBase(aInstance, AnnounceSender::HandleTimer) |
| , mTrickleTimer(aInstance, AnnounceSender::HandleTrickleTimer) |
| { |
| SetJitter(kMaxJitter); |
| } |
| |
| void AnnounceSender::UpdateOnReceivedAnnounce(void) |
| { |
| mTrickleTimer.IndicateConsistent(); |
| } |
| |
| void AnnounceSender::Stop(void) |
| { |
| AnnounceSenderBase::Stop(); |
| mTrickleTimer.Stop(); |
| LogInfo("Stopped"); |
| } |
| |
| void AnnounceSender::HandleTimer(Timer &aTimer) |
| { |
| aTimer.Get<AnnounceSender>().AnnounceSenderBase::HandleTimer(); |
| } |
| |
| void AnnounceSender::HandleTrickleTimer(TrickleTimer &aTimer) |
| { |
| aTimer.Get<AnnounceSender>().HandleTrickleTimer(); |
| } |
| |
| void AnnounceSender::HandleTrickleTimer(void) |
| { |
| // The trickle timer handler is called when |
| // we do not receive enough Announce messages |
| // within the current interval and therefore |
| // the device itself needs to send Announce. |
| // We then request one more cycle of Announce |
| // message transmissions. |
| |
| SendAnnounce(1); |
| LogInfo("Schedule tx for one cycle"); |
| } |
| |
| void AnnounceSender::HandleNotifierEvents(Events aEvents) |
| { |
| if (aEvents.Contains(kEventThreadRoleChanged)) |
| { |
| HandleRoleChanged(); |
| } |
| |
| if (aEvents.Contains(kEventActiveDatasetChanged)) |
| { |
| HandleActiveDatasetChanged(); |
| } |
| |
| if (aEvents.Contains(kEventThreadChannelChanged)) |
| { |
| HandleThreadChannelChanged(); |
| } |
| } |
| |
| void AnnounceSender::HandleRoleChanged(void) |
| { |
| switch (Get<Mle::Mle>().GetRole()) |
| { |
| case Mle::kRoleLeader: |
| case Mle::kRoleRouter: |
| break; |
| |
| case Mle::kRoleChild: |
| #if OPENTHREAD_FTD |
| if (Get<Mle::MleRouter>().IsRouterEligible() && Get<Mle::Mle>().IsRxOnWhenIdle()) |
| { |
| break; |
| } |
| #endif |
| |
| OT_FALL_THROUGH; |
| |
| case Mle::kRoleDisabled: |
| case Mle::kRoleDetached: |
| Stop(); |
| ExitNow(); |
| } |
| |
| // Start the trickle timer with same min and max interval as the |
| // desired Announce Tx cycle interval. |
| |
| mTrickleTimer.Start(TrickleTimer::kModeTrickle, kInterval, kInterval, kRedundancyConstant); |
| LogInfo("Started"); |
| |
| exit: |
| return; |
| } |
| |
| void AnnounceSender::HandleActiveDatasetChanged(void) |
| { |
| Mac::ChannelMask channelMask; |
| |
| SuccessOrExit(Get<MeshCoP::ActiveDatasetManager>().GetChannelMask(channelMask)); |
| VerifyOrExit(!channelMask.IsEmpty()); |
| |
| VerifyOrExit(channelMask != GetChannelMask()); |
| |
| SetChannelMask(channelMask); |
| SetPeriod(kTxInterval / channelMask.GetNumberOfChannels()); |
| LogInfo("ChannelMask:%s, period:%u", GetChannelMask().ToString().AsCString(), GetPeriod()); |
| |
| // When channel mask is changed, we also check and update the PAN |
| // channel. This handles the case where `ThreadChannelChanged` event |
| // may be received and processed before `ActiveDatasetChanged` |
| // event. |
| |
| HandleThreadChannelChanged(); |
| |
| exit: |
| return; |
| } |
| |
| void AnnounceSender::HandleThreadChannelChanged(void) |
| { |
| SetStartingChannel(Get<Mac::Mac>().GetPanChannel()); |
| LogInfo("StartingChannel:%d", GetStartingChannel()); |
| } |
| |
| #endif // OPENTHREAD_CONFIG_ANNOUNCE_SENDER_ENABLE |
| |
| } // namespace ot |