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components/openthread/openthread/src/core/meshcop/meshcop_leader.cpp
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/*
* 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 a MeshCoP Leader.
*/
#include "meshcop_leader.hpp"
#if OPENTHREAD_FTD
#include "instance/instance.hpp"
namespace ot {
namespace MeshCoP {
RegisterLogModule("MeshCoPLeader");
Leader::Leader(Instance &aInstance)
: InstanceLocator(aInstance)
, mTimer(aInstance)
, mDelayTimerMinimal(DelayTimerTlv::kMinDelay)
, mSessionId(Random::NonCrypto::GetUint16())
{
}
template <> void Leader::HandleTmf<kUriLeaderPetition>(Coap::Message &aMessage, const Ip6::MessageInfo &aMessageInfo)
{
OT_UNUSED_VARIABLE(aMessageInfo);
CommissioningData data;
CommissionerIdTlv::StringType commissionerId;
StateTlv::State state = StateTlv::kReject;
LogInfo("Received %s", UriToString<kUriLeaderPetition>());
VerifyOrExit(Get<Mle::MleRouter>().IsLeader());
VerifyOrExit(Get<Mle::MleRouter>().IsRoutingLocator(aMessageInfo.GetPeerAddr()));
SuccessOrExit(Tlv::Find<CommissionerIdTlv>(aMessage, commissionerId));
if (mTimer.IsRunning())
{
VerifyOrExit(StringMatch(mCommissionerId, commissionerId));
ResignCommissioner();
}
data.Init(aMessageInfo.GetPeerAddr().GetIid().GetLocator(), ++mSessionId);
SuccessOrExit(Get<NetworkData::Leader>().SetCommissioningData(&data, data.GetLength()));
IgnoreError(StringCopy(mCommissionerId, commissionerId));
state = StateTlv::kAccept;
mTimer.Start(Time::SecToMsec(kTimeoutLeaderPetition));
exit:
SendPetitionResponse(aMessage, aMessageInfo, state);
}
void Leader::SendPetitionResponse(const Coap::Message &aRequest,
const Ip6::MessageInfo &aMessageInfo,
StateTlv::State aState)
{
Error error = kErrorNone;
Coap::Message *message;
message = Get<Tmf::Agent>().NewPriorityResponseMessage(aRequest);
VerifyOrExit(message != nullptr, error = kErrorNoBufs);
SuccessOrExit(error = Tlv::Append<StateTlv>(*message, aState));
if (mTimer.IsRunning())
{
SuccessOrExit(error = Tlv::Append<CommissionerIdTlv>(*message, mCommissionerId));
}
if (aState == StateTlv::kAccept)
{
SuccessOrExit(error = Tlv::Append<CommissionerSessionIdTlv>(*message, mSessionId));
}
SuccessOrExit(error = Get<Tmf::Agent>().SendMessage(*message, aMessageInfo));
LogInfo("Sent %s response", UriToString<kUriLeaderPetition>());
exit:
FreeMessageOnError(message, error);
LogWarnOnError(error, "send petition response");
}
template <> void Leader::HandleTmf<kUriLeaderKeepAlive>(Coap::Message &aMessage, const Ip6::MessageInfo &aMessageInfo)
{
uint8_t state;
uint16_t sessionId;
BorderAgentLocatorTlv *borderAgentLocator;
StateTlv::State responseState;
LogInfo("Received %s", UriToString<kUriLeaderKeepAlive>());
VerifyOrExit(Get<Mle::MleRouter>().IsLeader());
SuccessOrExit(Tlv::Find<StateTlv>(aMessage, state));
SuccessOrExit(Tlv::Find<CommissionerSessionIdTlv>(aMessage, sessionId));
borderAgentLocator = Get<NetworkData::Leader>().FindInCommissioningData<BorderAgentLocatorTlv>();
if ((borderAgentLocator == nullptr) || (sessionId != mSessionId))
{
responseState = StateTlv::kReject;
}
else if (state != StateTlv::kAccept)
{
responseState = StateTlv::kReject;
ResignCommissioner();
}
else
{
uint16_t rloc = aMessageInfo.GetPeerAddr().GetIid().GetLocator();
if (borderAgentLocator->GetBorderAgentLocator() != rloc)
{
borderAgentLocator->SetBorderAgentLocator(rloc);
Get<NetworkData::Leader>().IncrementVersion();
}
responseState = StateTlv::kAccept;
mTimer.Start(Time::SecToMsec(kTimeoutLeaderPetition));
}
SendKeepAliveResponse(aMessage, aMessageInfo, responseState);
exit:
return;
}
void Leader::SendKeepAliveResponse(const Coap::Message &aRequest,
const Ip6::MessageInfo &aMessageInfo,
StateTlv::State aState)
{
Error error = kErrorNone;
Coap::Message *message;
message = Get<Tmf::Agent>().NewPriorityResponseMessage(aRequest);
VerifyOrExit(message != nullptr, error = kErrorNoBufs);
SuccessOrExit(error = Tlv::Append<StateTlv>(*message, aState));
SuccessOrExit(error = Get<Tmf::Agent>().SendMessage(*message, aMessageInfo));
LogInfo("Sent %s response", UriToString<kUriLeaderKeepAlive>());
exit:
FreeMessageOnError(message, error);
LogWarnOnError(error, "send keep alive response");
}
void Leader::SendDatasetChanged(const Ip6::Address &aAddress)
{
Error error = kErrorNone;
Tmf::MessageInfo messageInfo(GetInstance());
Coap::Message *message;
message = Get<Tmf::Agent>().NewPriorityConfirmablePostMessage(kUriDatasetChanged);
VerifyOrExit(message != nullptr, error = kErrorNoBufs);
messageInfo.SetSockAddrToRlocPeerAddrTo(aAddress);
SuccessOrExit(error = Get<Tmf::Agent>().SendMessage(*message, messageInfo));
LogInfo("Sent %s", UriToString<kUriDatasetChanged>());
exit:
FreeMessageOnError(message, error);
LogWarnOnError(error, "send dataset changed");
}
Error Leader::SetDelayTimerMinimal(uint32_t aDelayTimerMinimal)
{
Error error = kErrorNone;
VerifyOrExit((aDelayTimerMinimal != 0 && aDelayTimerMinimal < DelayTimerTlv::kMinDelay), error = kErrorInvalidArgs);
mDelayTimerMinimal = aDelayTimerMinimal;
exit:
return error;
}
void Leader::HandleTimer(void)
{
VerifyOrExit(Get<Mle::MleRouter>().IsLeader());
ResignCommissioner();
exit:
return;
}
void Leader::SetEmptyCommissionerData(void)
{
CommissionerSessionIdTlv sessionIdTlv;
sessionIdTlv.Init();
sessionIdTlv.SetCommissionerSessionId(++mSessionId);
IgnoreError(Get<NetworkData::Leader>().SetCommissioningData(&sessionIdTlv, sizeof(CommissionerSessionIdTlv)));
}
void Leader::ResignCommissioner(void)
{
mTimer.Stop();
SetEmptyCommissionerData();
LogInfo("commissioner inactive");
}
void Leader::CommissioningData::Init(uint16_t aBorderAgentRloc16, uint16_t aSessionId)
{
mBorderAgentLocatorTlv.Init();
mBorderAgentLocatorTlv.SetBorderAgentLocator(aBorderAgentRloc16);
mSessionIdTlv.Init();
mSessionIdTlv.SetCommissionerSessionId(aSessionId);
mSteeringDataTlv.Init();
mSteeringDataTlv.SetLength(1);
mSteeringDataTlv.Clear();
}
uint8_t Leader::CommissioningData::GetLength(void) const
{
return static_cast<uint8_t>(sizeof(BorderAgentLocatorTlv) + sizeof(CommissionerSessionIdTlv) +
mSteeringDataTlv.GetSize());
}
} // namespace MeshCoP
} // namespace ot
#endif // OPENTHREAD_FTD
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