C++ MessageInfo::GetPeerAddr方法代码示例

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), &timestamp) >=
        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);
    }
}