void Interpreter::HandleEchoResponse(void *aContext, Message &aMessage, const Ip6::MessageInfo &aMessageInfo)
{
Ip6::IcmpHeader icmp6Header;
uint32_t timestamp = 0;
aMessage.Read(aMessage.GetOffset(), sizeof(icmp6Header), &icmp6Header);
sServer->OutputFormat("%d bytes from ", aMessage.GetLength() - aMessage.GetOffset());
sServer->OutputFormat("%x:%x:%x:%x:%x:%x:%x:%x",
HostSwap16(aMessageInfo.GetPeerAddr().mFields.m16[0]),
HostSwap16(aMessageInfo.GetPeerAddr().mFields.m16[1]),
HostSwap16(aMessageInfo.GetPeerAddr().mFields.m16[2]),
HostSwap16(aMessageInfo.GetPeerAddr().mFields.m16[3]),
HostSwap16(aMessageInfo.GetPeerAddr().mFields.m16[4]),
HostSwap16(aMessageInfo.GetPeerAddr().mFields.m16[5]),
HostSwap16(aMessageInfo.GetPeerAddr().mFields.m16[6]),
HostSwap16(aMessageInfo.GetPeerAddr().mFields.m16[7]));
sServer->OutputFormat(": icmp_seq=%d hlim=%d", icmp6Header.GetSequence(), aMessageInfo.mHopLimit);
if (aMessage.Read(aMessage.GetOffset() + sizeof(icmp6Header), sizeof(uint32_t), ×tamp) >=
static_cast<int>(sizeof(uint32_t)))
{
sServer->OutputFormat(" time=%dms", Timer::GetNow() - HostSwap32(timestamp));
}
sServer->OutputFormat("\r\n");
(void)aContext;
}
void Joiner::HandleUdpTransmit(void)
{
ThreadError error = kThreadError_None;
Ip6::MessageInfo messageInfo;
otLogFuncEntry();
VerifyOrExit(mTransmitMessage != NULL, error = kThreadError_NoBufs);
otLogInfoMeshCoP("transmit %d (to %llX)", mTransmitMessage->GetLength(),
HostSwap64(*reinterpret_cast<uint64_t *>(&mJoinerRouter)));
messageInfo.GetPeerAddr().mFields.m16[0] = HostSwap16(0xfe80);
messageInfo.GetPeerAddr().SetIid(mJoinerRouter);
messageInfo.SetPeerPort(mJoinerUdpPort);
messageInfo.SetInterfaceId(OT_NETIF_INTERFACE_ID_THREAD);
SuccessOrExit(error = mSocket.SendTo(*mTransmitMessage, messageInfo));
exit:
if (error != kThreadError_None && mTransmitMessage != NULL)
{
mTransmitMessage->Free();
}
mTransmitMessage = NULL;
otLogFuncExit();
}
void JoinerRouter::HandleUdpReceive(Message &aMessage, const Ip6::MessageInfo &aMessageInfo)
{
ThreadNetif & netif = GetNetif();
otError error;
Coap::Message * message = NULL;
Ip6::MessageInfo messageInfo;
JoinerUdpPortTlv udpPort;
JoinerIidTlv iid;
JoinerRouterLocatorTlv rloc;
ExtendedTlv tlv;
uint16_t borderAgentRloc;
uint16_t offset;
otLogInfoMeshCoP("JoinerRouter::HandleUdpReceive");
SuccessOrExit(error = GetBorderAgentRloc(GetNetif(), borderAgentRloc));
VerifyOrExit((message = NewMeshCoPMessage(netif.GetCoap())) != NULL, error = OT_ERROR_NO_BUFS);
message->Init(OT_COAP_TYPE_NON_CONFIRMABLE, OT_COAP_CODE_POST);
message->SetToken(Coap::Message::kDefaultTokenLength);
message->AppendUriPathOptions(OT_URI_PATH_RELAY_RX);
message->SetPayloadMarker();
udpPort.Init();
udpPort.SetUdpPort(aMessageInfo.GetPeerPort());
SuccessOrExit(error = message->Append(&udpPort, sizeof(udpPort)));
iid.Init();
iid.SetIid(aMessageInfo.GetPeerAddr().mFields.m8 + 8);
SuccessOrExit(error = message->Append(&iid, sizeof(iid)));
rloc.Init();
rloc.SetJoinerRouterLocator(netif.GetMle().GetRloc16());
SuccessOrExit(error = message->Append(&rloc, sizeof(rloc)));
tlv.SetType(Tlv::kJoinerDtlsEncapsulation);
tlv.SetLength(aMessage.GetLength() - aMessage.GetOffset());
SuccessOrExit(error = message->Append(&tlv, sizeof(tlv)));
offset = message->GetLength();
SuccessOrExit(error = message->SetLength(offset + tlv.GetLength()));
aMessage.CopyTo(aMessage.GetOffset(), offset, tlv.GetLength(), *message);
messageInfo.SetSockAddr(netif.GetMle().GetMeshLocal16());
messageInfo.SetPeerAddr(netif.GetMle().GetMeshLocal16());
messageInfo.GetPeerAddr().mFields.m16[7] = HostSwap16(borderAgentRloc);
messageInfo.SetPeerPort(kCoapUdpPort);
SuccessOrExit(error = netif.GetCoap().SendMessage(*message, messageInfo));
otLogInfoMeshCoP("Sent relay rx");
exit:
if (error != OT_ERROR_NONE && message != NULL)
{
message->Free();
}
}
void Dtls::HandleUdpReceive(Message &aMessage, const Ip6::MessageInfo &aMessageInfo)
{
switch (mState)
{
case MeshCoP::Dtls::kStateClosed:
ExitNow();
case MeshCoP::Dtls::kStateOpen:
{
Ip6::SockAddr sockAddr;
sockAddr.mAddress = aMessageInfo.GetPeerAddr();
sockAddr.mPort = aMessageInfo.GetPeerPort();
mSocket.Connect(sockAddr);
mPeerAddress.SetPeerAddr(aMessageInfo.GetPeerAddr());
mPeerAddress.SetPeerPort(aMessageInfo.GetPeerPort());
mPeerAddress.SetInterfaceId(aMessageInfo.GetInterfaceId());
if (Get<ThreadNetif>().IsUnicastAddress(aMessageInfo.GetSockAddr()))
{
mPeerAddress.SetSockAddr(aMessageInfo.GetSockAddr());
}
mPeerAddress.SetSockPort(aMessageInfo.GetSockPort());
SuccessOrExit(Setup(false));
break;
}
default:
// Once DTLS session is started, communicate only with a peer.
VerifyOrExit((mPeerAddress.GetPeerAddr() == aMessageInfo.GetPeerAddr()) &&
(mPeerAddress.GetPeerPort() == aMessageInfo.GetPeerPort()));
break;
}
#if OPENTHREAD_ENABLE_BORDER_AGENT || OPENTHREAD_ENABLE_COMMISSIONER
if (mState == MeshCoP::Dtls::kStateConnecting)
{
SetClientId(mPeerAddress.GetPeerAddr().mFields.m8, sizeof(mPeerAddress.GetPeerAddr().mFields));
}
#endif
Receive(aMessage, aMessage.GetOffset(), aMessage.GetLength() - aMessage.GetOffset());
exit:
return;
}
otError Dhcp6Server::SendReply(otIp6Address &aDst, uint8_t *aTransactionId, ClientIdentifier &aClient, IaNa &aIaNa)
{
otError error = OT_ERROR_NONE;
Ip6::MessageInfo messageInfo;
Message *message;
VerifyOrExit((message = mSocket.NewMessage(0)) != NULL, error = OT_ERROR_NO_BUFS);
SuccessOrExit(error = AppendHeader(*message, aTransactionId));
SuccessOrExit(error = AppendServerIdentifier(*message));
SuccessOrExit(error = AppendClientIdentifier(*message, aClient));
SuccessOrExit(error = AppendIaNa(*message, aIaNa));
SuccessOrExit(error = AppendStatusCode(*message, kStatusSuccess));
SuccessOrExit(error = AppendIaAddress(*message, aClient));
SuccessOrExit(error = AppendRapidCommit(*message));
memset(&messageInfo, 0, sizeof(messageInfo));
memcpy(&messageInfo.GetPeerAddr().mFields.m8, &aDst, sizeof(otIp6Address));
messageInfo.mPeerPort = kDhcpClientPort;
SuccessOrExit(error = mSocket.SendTo(*message, messageInfo));
exit:
if (message != NULL && error != OT_ERROR_NONE)
{
message->Free();
}
return error;
}
RequestMetadata::RequestMetadata(bool aConfirmable, const Ip6::MessageInfo &aMessageInfo,
otCoapResponseHandler aHandler, void *aContext)
{
mDestinationPort = aMessageInfo.mPeerPort;
mDestinationAddress = aMessageInfo.GetPeerAddr();
mResponseHandler = aHandler;
mResponseContext = aContext;
mRetransmissionCount = 0;
mRetransmissionTimeout = Timer::SecToMsec(kAckTimeout);
mRetransmissionTimeout += otPlatRandomGet() %
(Timer::SecToMsec(kAckTimeout) * kAckRandomFactorNumerator / kAckRandomFactorDenominator -
Timer::SecToMsec(kAckTimeout) + 1);
if (aConfirmable)
{
// Set next retransmission timeout.
mNextTimerShot = Timer::GetNow() + mRetransmissionTimeout;
}
else
{
// Set overall response timeout.
mNextTimerShot = Timer::GetNow() + kMaxTransmitWait;
}
mAcknowledged = false;
mConfirmable = aConfirmable;
}
bool ThreadNetif::IsTmfMessage(const Ip6::MessageInfo &aMessageInfo)
{
bool rval = true;
// A TMF message must comply with following rules:
// 1. The destination is a Mesh Local Address or a Link-Local Multicast Address or a Realm-Local Multicast Address,
// and the source is a Mesh Local Address. Or
// 2. Both the destination and the source are Link-Local Addresses.
VerifyOrExit(
((mMleRouter.IsMeshLocalAddress(aMessageInfo.GetSockAddr()) ||
aMessageInfo.GetSockAddr().IsLinkLocalMulticast() || aMessageInfo.GetSockAddr().IsRealmLocalMulticast()) &&
mMleRouter.IsMeshLocalAddress(aMessageInfo.GetPeerAddr())) ||
((aMessageInfo.GetSockAddr().IsLinkLocal() || aMessageInfo.GetSockAddr().IsLinkLocalMulticast()) &&
aMessageInfo.GetPeerAddr().IsLinkLocal()),
rval = false);
exit:
return rval;
}
void CoapSecure::Receive(Message &aMessage, const Ip6::MessageInfo &aMessageInfo)
{
ThreadNetif &netif = GetNetif();
if (!netif.GetDtls().IsStarted())
{
Ip6::SockAddr sockAddr;
sockAddr.mAddress = aMessageInfo.GetPeerAddr();
sockAddr.mPort = aMessageInfo.GetPeerPort();
mSocket.Connect(sockAddr);
mPeerAddress.SetPeerAddr(aMessageInfo.GetPeerAddr());
mPeerAddress.SetPeerPort(aMessageInfo.GetPeerPort());
mPeerAddress.SetInterfaceId(aMessageInfo.GetInterfaceId());
if (netif.IsUnicastAddress(aMessageInfo.GetSockAddr()))
{
mPeerAddress.SetSockAddr(aMessageInfo.GetSockAddr());
}
mPeerAddress.SetSockPort(aMessageInfo.GetSockPort());
netif.GetDtls().Start(false, &CoapSecure::HandleDtlsConnected, &CoapSecure::HandleDtlsReceive,
CoapSecure::HandleDtlsSend, this);
}
else
{
// Once DTLS session is started, communicate only with a peer.
VerifyOrExit((mPeerAddress.GetPeerAddr() == aMessageInfo.GetPeerAddr()) &&
(mPeerAddress.GetPeerPort() == aMessageInfo.GetPeerPort()));
}
netif.GetDtls().SetClientId(mPeerAddress.GetPeerAddr().mFields.m8, sizeof(mPeerAddress.GetPeerAddr().mFields));
netif.GetDtls().Receive(aMessage, aMessage.GetOffset(), aMessage.GetLength() - aMessage.GetOffset());
exit:
return;
}
void EnergyScanServer::HandleRequest(Coap::Header &aHeader, Message &aMessage, const Ip6::MessageInfo &aMessageInfo)
{
MeshCoP::CountTlv count;
MeshCoP::PeriodTlv period;
MeshCoP::ScanDurationTlv scanDuration;
MeshCoP::ChannelMask0Tlv channelMask;
Ip6::MessageInfo responseInfo(aMessageInfo);
VerifyOrExit(aHeader.GetCode() == OT_COAP_CODE_POST);
SuccessOrExit(MeshCoP::Tlv::GetTlv(aMessage, MeshCoP::Tlv::kCount, sizeof(count), count));
VerifyOrExit(count.IsValid());
SuccessOrExit(MeshCoP::Tlv::GetTlv(aMessage, MeshCoP::Tlv::kPeriod, sizeof(period), period));
VerifyOrExit(period.IsValid());
SuccessOrExit(MeshCoP::Tlv::GetTlv(aMessage, MeshCoP::Tlv::kScanDuration, sizeof(scanDuration), scanDuration));
VerifyOrExit(scanDuration.IsValid());
SuccessOrExit(MeshCoP::Tlv::GetTlv(aMessage, MeshCoP::Tlv::kChannelMask, sizeof(channelMask), channelMask));
VerifyOrExit(channelMask.IsValid());
mChannelMask = channelMask.GetMask();
mChannelMaskCurrent = mChannelMask;
mCount = count.GetCount();
mPeriod = period.GetPeriod();
mScanDuration = scanDuration.GetScanDuration();
mScanResultsLength = 0;
mActive = true;
mTimer.Start(kScanDelay);
mCommissioner = aMessageInfo.GetPeerAddr();
if (aHeader.IsConfirmable() && !aMessageInfo.GetSockAddr().IsMulticast())
{
SuccessOrExit(GetNetif().GetCoap().SendEmptyAck(aHeader, responseInfo));
otLogInfoMeshCoP(GetInstance(), "sent energy scan query response");
}
exit:
return;
}
void Leader::HandlePetition(Coap::Header &aHeader, Message &aMessage, const Ip6::MessageInfo &aMessageInfo)
{
CommissioningData data;
CommissionerIdTlv commissionerId;
StateTlv::State state = StateTlv::kReject;
otLogInfoMeshCoP(GetInstance(), "received petition");
SuccessOrExit(Tlv::GetTlv(aMessage, Tlv::kCommissionerId, sizeof(commissionerId), commissionerId));
VerifyOrExit(commissionerId.IsValid());
if (mTimer.IsRunning())
{
VerifyOrExit(!strncmp(commissionerId.GetCommissionerId(), mCommissionerId.GetCommissionerId(),
sizeof(mCommissionerId)));
ResignCommissioner();
}
data.mBorderAgentLocator.Init();
data.mBorderAgentLocator.SetBorderAgentLocator(HostSwap16(aMessageInfo.GetPeerAddr().mFields.m16[7]));
data.mCommissionerSessionId.Init();
data.mCommissionerSessionId.SetCommissionerSessionId(++mSessionId);
data.mSteeringData.Init();
data.mSteeringData.SetLength(1);
data.mSteeringData.Clear();
SuccessOrExit(GetNetif().GetNetworkDataLeader().SetCommissioningData(reinterpret_cast<uint8_t *>(&data),
data.GetLength()));
mCommissionerId = commissionerId;
state = StateTlv::kAccept;
mTimer.Start(TimerMilli::SecToMsec(kTimeoutLeaderPetition));
exit:
OT_UNUSED_VARIABLE(aMessageInfo);
SendPetitionResponse(aHeader, aMessageInfo, state);
}
void Client::HandleUdpReceive(Message &aMessage, const Ip6::MessageInfo &aMessageInfo)
{
Header responseHeader;
Header requestHeader;
RequestMetadata requestMetadata;
Message *message = NULL;
ThreadError error;
SuccessOrExit(error = responseHeader.FromMessage(aMessage));
aMessage.MoveOffset(responseHeader.GetLength());
message = FindRelatedRequest(responseHeader, aMessageInfo, requestHeader, requestMetadata);
if (message == NULL)
{
ExitNow();
}
switch (responseHeader.GetType())
{
case kCoapTypeReset:
if (responseHeader.IsEmpty())
{
FinalizeCoapTransaction(*message, requestMetadata, NULL, NULL, kThreadError_Abort);
}
// Silently ignore non-empty reset messages (RFC 7252, p. 4.2).
break;
case kCoapTypeAcknowledgment:
if (responseHeader.IsEmpty())
{
// Empty acknowledgment.
if (requestMetadata.mConfirmable)
{
requestMetadata.mAcknowledged = true;
requestMetadata.UpdateIn(*message);
}
// Remove the message if response is not expected, otherwise await response.
if (requestMetadata.mResponseHandler == NULL)
{
DequeueMessage(*message);
}
}
else if (responseHeader.IsResponse() && responseHeader.IsTokenEqual(requestHeader))
{
// Piggybacked response.
FinalizeCoapTransaction(*message, requestMetadata, &responseHeader, &aMessage, kThreadError_None);
}
// Silently ignore acknowledgments carrying requests (RFC 7252, p. 4.2)
// or with no token match (RFC 7252, p. 5.3.2)
break;
case kCoapTypeConfirmable:
case kCoapTypeNonConfirmable:
if (responseHeader.IsConfirmable())
{
// Send empty ACK if it is a CON message.
SendEmptyAck(aMessageInfo.GetPeerAddr(), aMessageInfo.mPeerPort, responseHeader.GetMessageId());
}
FinalizeCoapTransaction(*message, requestMetadata, &responseHeader, &aMessage, kThreadError_None);
break;
}
exit:
if (error == kThreadError_None && message == NULL)
{
if (responseHeader.IsConfirmable() || responseHeader.IsNonConfirmable())
{
// Successfully parsed a header but no matching request was found - reject the message by sending reset.
SendReset(aMessageInfo.GetPeerAddr(), aMessageInfo.mPeerPort, responseHeader.GetMessageId());
}
}
}
void Client::HandleRetransmissionTimer(void)
{
uint32_t now = otPlatAlarmGetNow();
uint32_t nextDelta = 0xffffffff;
RequestMetadata requestMetadata;
Message *message = mPendingRequests.GetHead();
Message *nextMessage = NULL;
Ip6::MessageInfo messageInfo;
while (message != NULL)
{
nextMessage = message->GetNext();
requestMetadata.ReadFrom(*message);
if (requestMetadata.IsLater(now))
{
// Calculate the next delay and choose the lowest.
if (requestMetadata.mNextTimerShot - now < nextDelta)
{
nextDelta = requestMetadata.mNextTimerShot - now;
}
}
else if ((requestMetadata.mConfirmable) &&
(requestMetadata.mRetransmissionCount < kMaxRetransmit))
{
// Increment retransmission counter and timer.
requestMetadata.mRetransmissionCount++;
requestMetadata.mRetransmissionTimeout *= 2;
requestMetadata.mNextTimerShot = now + requestMetadata.mRetransmissionTimeout;
requestMetadata.UpdateIn(*message);
// Check if retransmission time is lower than current lowest.
if (requestMetadata.mRetransmissionTimeout < nextDelta)
{
nextDelta = requestMetadata.mRetransmissionTimeout;
}
// Retransmit
if (!requestMetadata.mAcknowledged)
{
memset(&messageInfo, 0, sizeof(messageInfo));
messageInfo.GetPeerAddr() = requestMetadata.mDestinationAddress;
messageInfo.mPeerPort = requestMetadata.mDestinationPort;
SendCopy(*message, messageInfo);
}
}
else
{
// No expected response or acknowledgment.
FinalizeCoapTransaction(*message, requestMetadata, NULL, NULL, kThreadError_ResponseTimeout);
}
message = nextMessage;
}
if (nextDelta != 0xffffffff)
{
mRetransmissionTimer.Start(nextDelta);
}
}