| /* |
| * 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 mesh forwarding of IPv6/6LoWPAN messages. |
| */ |
| |
| #define WPP_NAME "mesh_forwarder.tmh" |
| |
| #include <openthread/config.h> |
| |
| #include "mesh_forwarder.hpp" |
| |
| #include <openthread/platform/random.h> |
| |
| #include "openthread-instance.h" |
| #include "common/code_utils.hpp" |
| #include "common/debug.hpp" |
| #include "common/encoding.hpp" |
| #include "common/logging.hpp" |
| #include "common/message.hpp" |
| #include "net/ip6.hpp" |
| #include "net/ip6_filter.hpp" |
| #include "net/netif.hpp" |
| #include "net/tcp.hpp" |
| #include "net/udp6.hpp" |
| #include "thread/mle.hpp" |
| #include "thread/mle_router.hpp" |
| #include "thread/thread_netif.hpp" |
| |
| using ot::Encoding::BigEndian::HostSwap16; |
| |
| namespace ot { |
| |
| MeshForwarder::MeshForwarder(ThreadNetif &aThreadNetif): |
| ThreadNetifLocator(aThreadNetif), |
| mMacReceiver(&MeshForwarder::HandleReceivedFrame, &MeshForwarder::HandleDataPollTimeout, this), |
| mMacSender(&MeshForwarder::HandleFrameRequest, &MeshForwarder::HandleSentFrame, this), |
| mDiscoverTimer(aThreadNetif.GetIp6().mTimerScheduler, &MeshForwarder::HandleDiscoverTimer, this), |
| mReassemblyTimer(aThreadNetif.GetIp6().mTimerScheduler, &MeshForwarder::HandleReassemblyTimer, this), |
| mMessageNextOffset(0), |
| mSendMessageFrameCounter(0), |
| mSendMessage(NULL), |
| mSendMessageIsARetransmission(false), |
| mSendMessageMaxMacTxAttempts(Mac::kDirectFrameMacTxAttempts), |
| mSendMessageKeyId(0), |
| mSendMessageDataSequenceNumber(0), |
| mStartChildIndex(0), |
| mMeshSource(Mac::kShortAddrInvalid), |
| mMeshDest(Mac::kShortAddrInvalid), |
| mAddMeshHeader(false), |
| mSendBusy(false), |
| mScheduleTransmissionTask(aThreadNetif.GetIp6().mTaskletScheduler, ScheduleTransmissionTask, this), |
| mEnabled(false), |
| mScanChannels(0), |
| mScanChannel(0), |
| mRestoreChannel(0), |
| mRestorePanId(Mac::kPanIdBroadcast), |
| mScanning(false), |
| mDataPollManager(*this), |
| mSourceMatchController(*this) |
| { |
| mFragTag = static_cast<uint16_t>(otPlatRandomGet()); |
| aThreadNetif.GetMac().RegisterReceiver(mMacReceiver); |
| mMacSource.mLength = 0; |
| mMacDest.mLength = 0; |
| |
| mIpCounters.mTxSuccess = 0; |
| mIpCounters.mRxSuccess = 0; |
| mIpCounters.mTxFailure = 0; |
| mIpCounters.mRxFailure = 0; |
| } |
| |
| otError MeshForwarder::Start(void) |
| { |
| otError error = OT_ERROR_NONE; |
| |
| if (mEnabled == false) |
| { |
| GetNetif().GetMac().SetRxOnWhenIdle(true); |
| mEnabled = true; |
| } |
| |
| return error; |
| } |
| |
| otError MeshForwarder::Stop(void) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| Message *message; |
| |
| VerifyOrExit(mEnabled == true); |
| |
| mDataPollManager.StopPolling(); |
| mReassemblyTimer.Stop(); |
| |
| if (mScanning) |
| { |
| netif.GetMac().SetChannel(mRestoreChannel); |
| mScanning = false; |
| netif.GetMle().HandleDiscoverComplete(); |
| } |
| |
| while ((message = mSendQueue.GetHead()) != NULL) |
| { |
| mSendQueue.Dequeue(*message); |
| message->Free(); |
| } |
| |
| while ((message = mReassemblyList.GetHead()) != NULL) |
| { |
| mReassemblyList.Dequeue(*message); |
| message->Free(); |
| } |
| |
| mEnabled = false; |
| mSendMessage = NULL; |
| netif.GetMac().SetRxOnWhenIdle(false); |
| |
| exit: |
| return error; |
| } |
| |
| void MeshForwarder::HandleResolved(const Ip6::Address &aEid, otError aError) |
| { |
| Message *cur, *next; |
| Ip6::Address ip6Dst; |
| bool enqueuedMessage = false; |
| |
| for (cur = mResolvingQueue.GetHead(); cur; cur = next) |
| { |
| next = cur->GetNext(); |
| |
| if (cur->GetType() != Message::kTypeIp6) |
| { |
| continue; |
| } |
| |
| cur->Read(Ip6::Header::GetDestinationOffset(), sizeof(ip6Dst), &ip6Dst); |
| |
| if (memcmp(&ip6Dst, &aEid, sizeof(ip6Dst)) == 0) |
| { |
| mResolvingQueue.Dequeue(*cur); |
| |
| if (aError == OT_ERROR_NONE) |
| { |
| mSendQueue.Enqueue(*cur); |
| enqueuedMessage = true; |
| } |
| else |
| { |
| cur->Free(); |
| } |
| } |
| } |
| |
| if (enqueuedMessage) |
| { |
| mScheduleTransmissionTask.Post(); |
| } |
| } |
| |
| void MeshForwarder::ClearChildIndirectMessages(Child &aChild) |
| { |
| Message *nextMessage; |
| |
| VerifyOrExit(aChild.GetIndirectMessageCount() > 0); |
| |
| for (Message *message = mSendQueue.GetHead(); message; message = nextMessage) |
| { |
| nextMessage = message->GetNext(); |
| |
| message->ClearChildMask(GetNetif().GetMle().GetChildIndex(aChild)); |
| |
| if (!message->IsChildPending() && !message->GetDirectTransmission()) |
| { |
| if (mSendMessage == message) |
| { |
| mSendMessage = NULL; |
| } |
| |
| mSendQueue.Dequeue(*message); |
| message->Free(); |
| } |
| } |
| |
| mSourceMatchController.ResetMessageCount(aChild); |
| |
| exit: |
| return; |
| } |
| |
| void MeshForwarder::UpdateIndirectMessages(void) |
| { |
| Child *children; |
| uint8_t numChildren; |
| |
| children = GetNetif().GetMle().GetChildren(&numChildren); |
| |
| for (uint8_t i = 0; i < numChildren; i++) |
| { |
| Child *child = &children[i]; |
| |
| if (child->IsStateValidOrRestoring() || (child->GetIndirectMessageCount() == 0)) |
| { |
| continue; |
| } |
| |
| ClearChildIndirectMessages(*child); |
| } |
| } |
| |
| void MeshForwarder::ScheduleTransmissionTask(Tasklet &aTasklet) |
| { |
| GetOwner(aTasklet).ScheduleTransmissionTask(); |
| } |
| |
| void MeshForwarder::ScheduleTransmissionTask(void) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| uint8_t numChildren; |
| uint8_t childIndex; |
| uint8_t nextIndex; |
| Child *children; |
| |
| VerifyOrExit(mSendBusy == false, error = OT_ERROR_BUSY); |
| |
| UpdateIndirectMessages(); |
| |
| mSendMessageIsARetransmission = false; |
| |
| children = netif.GetMle().GetChildren(&numChildren); |
| |
| if (mStartChildIndex >= numChildren) |
| { |
| mStartChildIndex = 0; |
| } |
| |
| childIndex = mStartChildIndex; |
| |
| for (uint8_t iterations = numChildren; iterations > 0; iterations--, childIndex = nextIndex) |
| { |
| Child &child = children[childIndex]; |
| |
| if ((nextIndex = childIndex + 1) == numChildren) |
| { |
| nextIndex = 0; |
| } |
| |
| if (!child.IsStateValidOrRestoring() || !child.IsDataRequestPending()) |
| { |
| continue; |
| } |
| |
| mSendMessage = child.GetIndirectMessage(); |
| mSendMessageMaxMacTxAttempts = Mac::kIndirectFrameMacTxAttempts; |
| |
| if (mSendMessage == NULL) |
| { |
| mSendMessage = GetIndirectTransmission(child); |
| } |
| |
| if (mSendMessage != NULL) |
| { |
| PrepareIndirectTransmission(*mSendMessage, child); |
| } |
| else |
| { |
| // A NULL `mSendMessage` triggers an empty frame to be sent to the child. |
| |
| if (child.IsIndirectSourceMatchShort()) |
| { |
| mMacSource.mLength = sizeof(mMacSource.mShortAddress); |
| mMacSource.mShortAddress = netif.GetMac().GetShortAddress(); |
| } |
| else |
| { |
| mMacSource.mLength = sizeof(mMacSource.mExtAddress); |
| memcpy(mMacSource.mExtAddress.m8, netif.GetMac().GetExtAddress(), sizeof(mMacDest.mExtAddress)); |
| } |
| |
| child.GetMacAddress(mMacDest); |
| } |
| |
| // To ensure fairness in handling of data requests from sleepy |
| // children, once a message is scheduled and prepared for indirect |
| // transmission to a child, the `mStartChildIndex` is updated to |
| // the next index after the current child. Subsequent call to |
| // `ScheduleTransmissionTask()` will begin the iteration through |
| // the children list from this index. |
| |
| mStartChildIndex = nextIndex; |
| |
| netif.GetMac().SendFrameRequest(mMacSender); |
| ExitNow(); |
| } |
| |
| if ((mSendMessage = GetDirectTransmission()) != NULL) |
| { |
| netif.GetMac().SendFrameRequest(mMacSender); |
| mSendMessageMaxMacTxAttempts = Mac::kDirectFrameMacTxAttempts; |
| ExitNow(); |
| } |
| |
| exit: |
| |
| if (error != OT_ERROR_NONE) |
| { |
| otLogWarnMac(GetInstance(), "Error while scheduling transmission task: %s", |
| otThreadErrorToString(error)); |
| } |
| } |
| |
| otError MeshForwarder::SendMessage(Message &aMessage) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| Neighbor *neighbor; |
| |
| uint8_t numChildren; |
| Child *child; |
| |
| switch (aMessage.GetType()) |
| { |
| case Message::kTypeIp6: |
| { |
| Ip6::Header ip6Header; |
| |
| aMessage.Read(0, sizeof(ip6Header), &ip6Header); |
| |
| if (!memcmp(&ip6Header.GetDestination(), netif.GetMle().GetLinkLocalAllThreadNodesAddress(), |
| sizeof(ip6Header.GetDestination())) || |
| !memcmp(&ip6Header.GetDestination(), netif.GetMle().GetRealmLocalAllThreadNodesAddress(), |
| sizeof(ip6Header.GetDestination()))) |
| { |
| // schedule direct transmission |
| aMessage.SetDirectTransmission(); |
| |
| if (aMessage.GetSubType() != Message::kSubTypeMplRetransmission) |
| { |
| // destined for all sleepy children |
| child = netif.GetMle().GetChildren(&numChildren); |
| |
| for (uint8_t i = 0; i < numChildren; i++, child++) |
| { |
| if (child->IsStateValidOrRestoring() && !child->IsRxOnWhenIdle()) |
| { |
| aMessage.SetChildMask(i); |
| mSourceMatchController.IncrementMessageCount(*child); |
| } |
| } |
| } |
| } |
| else if ((neighbor = netif.GetMle().GetNeighbor(ip6Header.GetDestination())) != NULL && |
| !neighbor->IsRxOnWhenIdle() && |
| !aMessage.GetDirectTransmission()) |
| { |
| // destined for a sleepy child |
| child = static_cast<Child *>(neighbor); |
| aMessage.SetChildMask(netif.GetMle().GetChildIndex(*child)); |
| mSourceMatchController.IncrementMessageCount(*child); |
| } |
| else |
| { |
| // schedule direct transmission |
| aMessage.SetDirectTransmission(); |
| } |
| |
| break; |
| } |
| |
| case Message::kType6lowpan: |
| { |
| Lowpan::MeshHeader meshHeader; |
| |
| IgnoreReturnValue(meshHeader.Init(aMessage)); |
| |
| if ((neighbor = netif.GetMle().GetNeighbor(meshHeader.GetDestination())) != NULL && |
| !neighbor->IsRxOnWhenIdle()) |
| { |
| // destined for a sleepy child |
| child = static_cast<Child *>(neighbor); |
| aMessage.SetChildMask(netif.GetMle().GetChildIndex(*child)); |
| mSourceMatchController.IncrementMessageCount(*child); |
| } |
| else |
| { |
| // not destined for a sleepy child |
| aMessage.SetDirectTransmission(); |
| } |
| |
| break; |
| } |
| |
| case Message::kTypeMacDataPoll: |
| aMessage.SetDirectTransmission(); |
| break; |
| |
| case Message::kTypeSupervision: |
| child = netif.GetChildSupervisor().GetDestination(aMessage); |
| VerifyOrExit(child != NULL, error = OT_ERROR_DROP); |
| VerifyOrExit(!child->IsRxOnWhenIdle(), error = OT_ERROR_DROP); |
| |
| aMessage.SetChildMask(netif.GetMle().GetChildIndex(*child)); |
| mSourceMatchController.IncrementMessageCount(*child); |
| break; |
| } |
| |
| aMessage.SetOffset(0); |
| aMessage.SetDatagramTag(0); |
| SuccessOrExit(error = mSendQueue.Enqueue(aMessage)); |
| mScheduleTransmissionTask.Post(); |
| |
| exit: |
| return error; |
| } |
| |
| otError MeshForwarder::PrepareDiscoverRequest(void) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| |
| VerifyOrExit(!mScanning); |
| |
| mScanChannel = OT_RADIO_CHANNEL_MIN; |
| mScanChannels >>= OT_RADIO_CHANNEL_MIN; |
| mRestoreChannel = netif.GetMac().GetChannel(); |
| mRestorePanId = netif.GetMac().GetPanId(); |
| |
| while ((mScanChannels & 1) == 0) |
| { |
| mScanChannels >>= 1; |
| mScanChannel++; |
| |
| if (mScanChannel > OT_RADIO_CHANNEL_MAX) |
| { |
| netif.GetMle().HandleDiscoverComplete(); |
| ExitNow(error = OT_ERROR_DROP); |
| } |
| } |
| |
| mScanning = true; |
| |
| exit: |
| return error; |
| } |
| |
| Message *MeshForwarder::GetDirectTransmission(void) |
| { |
| Message *curMessage, *nextMessage; |
| otError error = OT_ERROR_NONE; |
| |
| for (curMessage = mSendQueue.GetHead(); curMessage; curMessage = nextMessage) |
| { |
| nextMessage = curMessage->GetNext(); |
| |
| if (curMessage->GetDirectTransmission() == false) |
| { |
| continue; |
| } |
| |
| switch (curMessage->GetType()) |
| { |
| case Message::kTypeIp6: |
| error = UpdateIp6Route(*curMessage); |
| |
| if (curMessage->GetSubType() == Message::kSubTypeMleDiscoverRequest) |
| { |
| error = PrepareDiscoverRequest(); |
| } |
| |
| break; |
| |
| case Message::kType6lowpan: |
| error = UpdateMeshRoute(*curMessage); |
| break; |
| |
| case Message::kTypeMacDataPoll: |
| ExitNow(); |
| |
| case Message::kTypeSupervision: |
| error = OT_ERROR_DROP; |
| break; |
| } |
| |
| switch (error) |
| { |
| case OT_ERROR_NONE: |
| ExitNow(); |
| |
| case OT_ERROR_ADDRESS_QUERY: |
| mSendQueue.Dequeue(*curMessage); |
| mResolvingQueue.Enqueue(*curMessage); |
| continue; |
| |
| case OT_ERROR_DROP: |
| case OT_ERROR_NO_BUFS: |
| mSendQueue.Dequeue(*curMessage); |
| curMessage->Free(); |
| continue; |
| |
| default: |
| assert(false); |
| break; |
| } |
| } |
| |
| exit: |
| return curMessage; |
| } |
| |
| Message *MeshForwarder::GetIndirectTransmission(Child &aChild) |
| { |
| Message *message = NULL; |
| Message *next; |
| uint8_t childIndex = GetNetif().GetMle().GetChildIndex(aChild); |
| |
| for (message = mSendQueue.GetHead(); message; message = next) |
| { |
| next = message->GetNext(); |
| |
| if (message->GetChildMask(childIndex)) |
| { |
| // Skip and remove the supervision message if there are other messages queued for the child. |
| |
| if ((message->GetType() == Message::kTypeSupervision) && (aChild.GetIndirectMessageCount() > 1)) |
| { |
| message->ClearChildMask(childIndex); |
| mSourceMatchController.DecrementMessageCount(aChild); |
| mSendQueue.Dequeue(*message); |
| message->Free(); |
| continue; |
| } |
| |
| break; |
| } |
| } |
| |
| aChild.SetIndirectMessage(message); |
| aChild.SetIndirectFragmentOffset(0); |
| aChild.ResetIndirectTxAttempts(); |
| |
| if (message != NULL) |
| { |
| Mac::Address macAddr; |
| |
| LogIp6Message(kMessagePrepareIndirect, *message, &aChild.GetMacAddress(macAddr), OT_ERROR_NONE); |
| } |
| |
| return message; |
| } |
| |
| void MeshForwarder::PrepareIndirectTransmission(Message &aMessage, const Child &aChild) |
| { |
| if (aChild.GetIndirectTxAttempts() > 0) |
| { |
| mSendMessageIsARetransmission = true; |
| mSendMessageFrameCounter = aChild.GetIndirectFrameCounter(); |
| mSendMessageKeyId = aChild.GetIndirectKeyId(); |
| mSendMessageDataSequenceNumber = aChild.GetIndirectDataSequenceNumber(); |
| } |
| |
| aMessage.SetOffset(aChild.GetIndirectFragmentOffset()); |
| |
| switch (aMessage.GetType()) |
| { |
| case Message::kTypeIp6: |
| { |
| Ip6::Header ip6Header; |
| |
| aMessage.Read(0, sizeof(ip6Header), &ip6Header); |
| |
| mAddMeshHeader = false; |
| GetMacSourceAddress(ip6Header.GetSource(), mMacSource); |
| |
| if (ip6Header.GetDestination().IsLinkLocal()) |
| { |
| GetMacDestinationAddress(ip6Header.GetDestination(), mMacDest); |
| } |
| else |
| { |
| aChild.GetMacAddress(mMacDest); |
| } |
| |
| break; |
| } |
| |
| case Message::kType6lowpan: |
| { |
| Lowpan::MeshHeader meshHeader; |
| |
| IgnoreReturnValue(meshHeader.Init(aMessage)); |
| mAddMeshHeader = true; |
| mMeshDest = meshHeader.GetDestination(); |
| mMeshSource = meshHeader.GetSource(); |
| mMacSource.mLength = sizeof(mMacSource.mShortAddress); |
| mMacSource.mShortAddress = GetNetif().GetMac().GetShortAddress(); |
| mMacDest.mLength = sizeof(mMacDest.mShortAddress); |
| mMacDest.mShortAddress = meshHeader.GetDestination(); |
| break; |
| } |
| |
| case Message::kTypeSupervision: |
| aChild.GetMacAddress(mMacDest); |
| break; |
| |
| default: |
| assert(false); |
| break; |
| } |
| } |
| |
| otError MeshForwarder::UpdateMeshRoute(Message &aMessage) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| Lowpan::MeshHeader meshHeader; |
| Neighbor *neighbor; |
| uint16_t nextHop; |
| |
| IgnoreReturnValue(meshHeader.Init(aMessage)); |
| |
| nextHop = netif.GetMle().GetNextHop(meshHeader.GetDestination()); |
| |
| if (nextHop != Mac::kShortAddrInvalid) |
| { |
| neighbor = netif.GetMle().GetNeighbor(nextHop); |
| } |
| else |
| { |
| neighbor = netif.GetMle().GetNeighbor(meshHeader.GetDestination()); |
| } |
| |
| if (neighbor == NULL) |
| { |
| ExitNow(error = OT_ERROR_DROP); |
| } |
| |
| mMacDest.mLength = sizeof(mMacDest.mShortAddress); |
| mMacDest.mShortAddress = neighbor->GetRloc16(); |
| mMacSource.mLength = sizeof(mMacSource.mShortAddress); |
| mMacSource.mShortAddress = netif.GetMac().GetShortAddress(); |
| |
| mAddMeshHeader = true; |
| mMeshDest = meshHeader.GetDestination(); |
| mMeshSource = meshHeader.GetSource(); |
| |
| exit: |
| return error; |
| } |
| |
| otError MeshForwarder::UpdateIp6Route(Message &aMessage) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| Ip6::Header ip6Header; |
| |
| mAddMeshHeader = false; |
| |
| aMessage.Read(0, sizeof(ip6Header), &ip6Header); |
| |
| switch (netif.GetMle().GetRole()) |
| { |
| case OT_DEVICE_ROLE_DISABLED: |
| case OT_DEVICE_ROLE_DETACHED: |
| if (ip6Header.GetDestination().IsLinkLocal() || ip6Header.GetDestination().IsLinkLocalMulticast()) |
| { |
| GetMacDestinationAddress(ip6Header.GetDestination(), mMacDest); |
| GetMacSourceAddress(ip6Header.GetSource(), mMacSource); |
| } |
| else |
| { |
| ExitNow(error = OT_ERROR_DROP); |
| } |
| |
| break; |
| |
| case OT_DEVICE_ROLE_CHILD: |
| case OT_DEVICE_ROLE_ROUTER: |
| case OT_DEVICE_ROLE_LEADER: |
| if (netif.GetMle().IsMinimalEndDevice()) |
| { |
| if (aMessage.IsLinkSecurityEnabled()) |
| { |
| mMacDest.mLength = sizeof(mMacDest.mShortAddress); |
| |
| if (ip6Header.GetDestination().IsLinkLocalMulticast()) |
| { |
| mMacDest.mShortAddress = Mac::kShortAddrBroadcast; |
| } |
| else |
| { |
| mMacDest.mShortAddress = netif.GetMle().GetNextHop(Mac::kShortAddrBroadcast); |
| } |
| |
| GetMacSourceAddress(ip6Header.GetSource(), mMacSource); |
| } |
| else if (ip6Header.GetDestination().IsLinkLocal() || ip6Header.GetDestination().IsLinkLocalMulticast()) |
| { |
| GetMacDestinationAddress(ip6Header.GetDestination(), mMacDest); |
| GetMacSourceAddress(ip6Header.GetSource(), mMacSource); |
| } |
| else |
| { |
| ExitNow(error = OT_ERROR_DROP); |
| } |
| } |
| |
| #if OPENTHREAD_FTD |
| else |
| { |
| uint16_t rloc16; |
| uint16_t aloc16; |
| Neighbor *neighbor; |
| |
| if (ip6Header.GetDestination().IsLinkLocal() || ip6Header.GetDestination().IsMulticast()) |
| { |
| GetMacDestinationAddress(ip6Header.GetDestination(), mMacDest); |
| GetMacSourceAddress(ip6Header.GetSource(), mMacSource); |
| } |
| else |
| { |
| if (netif.GetMle().IsRoutingLocator(ip6Header.GetDestination())) |
| { |
| rloc16 = HostSwap16(ip6Header.GetDestination().mFields.m16[7]); |
| VerifyOrExit(netif.GetMle().IsRouterIdValid(netif.GetMle().GetRouterId(rloc16)), |
| error = OT_ERROR_DROP); |
| mMeshDest = rloc16; |
| } |
| else if (netif.GetMle().IsAnycastLocator(ip6Header.GetDestination())) |
| { |
| aloc16 = HostSwap16(ip6Header.GetDestination().mFields.m16[7]); |
| |
| if (aloc16 == Mle::kAloc16Leader) |
| { |
| mMeshDest = netif.GetMle().GetRloc16(netif.GetMle().GetLeaderId()); |
| } |
| |
| #if OPENTHREAD_ENABLE_DHCP6_SERVER || OPENTHREAD_ENABLE_DHCP6_CLIENT |
| else if ((aloc16 & Mle::kAloc16DhcpAgentMask) != 0) |
| { |
| uint16_t agentRloc16; |
| uint8_t routerId; |
| VerifyOrExit((netif.GetNetworkDataLeader().GetRlocByContextId( |
| static_cast<uint8_t>(aloc16 & Mle::kAloc16DhcpAgentMask), |
| agentRloc16) == OT_ERROR_NONE), |
| error = OT_ERROR_DROP); |
| |
| routerId = netif.GetMle().GetRouterId(agentRloc16); |
| |
| // if agent is active router or the child of the device |
| if ((netif.GetMle().IsActiveRouter(agentRloc16)) || |
| (netif.GetMle().GetRloc16(routerId) == netif.GetMle().GetRloc16())) |
| { |
| mMeshDest = agentRloc16; |
| } |
| else |
| { |
| // use the parent of the ED Agent as Dest |
| mMeshDest = netif.GetMle().GetRloc16(routerId); |
| } |
| } |
| |
| #endif // OPENTHREAD_ENABLE_DHCP6_SERVER || OPENTHREAD_ENABLE_DHCP6_CLIENT |
| else |
| { |
| // TODO: support ALOC for Service, Commissioner, Neighbor Discovery Agent |
| ExitNow(error = OT_ERROR_DROP); |
| } |
| } |
| else if ((neighbor = netif.GetMle().GetNeighbor(ip6Header.GetDestination())) != NULL) |
| { |
| mMeshDest = neighbor->GetRloc16(); |
| } |
| else if (netif.GetNetworkDataLeader().IsOnMesh(ip6Header.GetDestination())) |
| { |
| SuccessOrExit(error = netif.GetAddressResolver().Resolve(ip6Header.GetDestination(), mMeshDest)); |
| } |
| else |
| { |
| netif.GetNetworkDataLeader().RouteLookup( |
| ip6Header.GetSource(), |
| ip6Header.GetDestination(), |
| NULL, |
| &mMeshDest |
| ); |
| } |
| |
| VerifyOrExit(mMeshDest != Mac::kShortAddrInvalid, error = OT_ERROR_DROP); |
| |
| if (netif.GetMle().GetNeighbor(mMeshDest) != NULL) |
| { |
| // destination is neighbor |
| mMacDest.mLength = sizeof(mMacDest.mShortAddress); |
| mMacDest.mShortAddress = mMeshDest; |
| GetMacSourceAddress(ip6Header.GetSource(), mMacSource); |
| } |
| else |
| { |
| // destination is not neighbor |
| mMeshSource = netif.GetMac().GetShortAddress(); |
| |
| SuccessOrExit(error = netif.GetMle().CheckReachability(mMeshSource, mMeshDest, ip6Header)); |
| |
| mMacDest.mLength = sizeof(mMacDest.mShortAddress); |
| mMacDest.mShortAddress = netif.GetMle().GetNextHop(mMeshDest); |
| mMacSource.mLength = sizeof(mMacSource.mShortAddress); |
| mMacSource.mShortAddress = mMeshSource; |
| mAddMeshHeader = true; |
| } |
| } |
| } |
| |
| #endif // OPENTHREAD_FTD |
| break; |
| |
| default: |
| break; |
| } |
| |
| exit: |
| return error; |
| } |
| |
| void MeshForwarder::SetRxOff(void) |
| { |
| ThreadNetif &netif = GetNetif(); |
| |
| netif.GetMac().SetRxOnWhenIdle(false); |
| mDataPollManager.StopPolling(); |
| netif.GetSupervisionListener().Stop(); |
| } |
| |
| bool MeshForwarder::GetRxOnWhenIdle(void) |
| { |
| return GetNetif().GetMac().GetRxOnWhenIdle(); |
| } |
| |
| void MeshForwarder::SetRxOnWhenIdle(bool aRxOnWhenIdle) |
| { |
| ThreadNetif &netif = GetNetif(); |
| |
| netif.GetMac().SetRxOnWhenIdle(aRxOnWhenIdle); |
| |
| if (aRxOnWhenIdle) |
| { |
| mDataPollManager.StopPolling(); |
| netif.GetSupervisionListener().Stop(); |
| } |
| else |
| { |
| mDataPollManager.StartPolling(); |
| netif.GetSupervisionListener().Start(); |
| } |
| } |
| |
| otError MeshForwarder::GetMacSourceAddress(const Ip6::Address &aIp6Addr, Mac::Address &aMacAddr) |
| { |
| ThreadNetif &netif = GetNetif(); |
| |
| aMacAddr.mLength = sizeof(aMacAddr.mExtAddress); |
| aMacAddr.mExtAddress.Set(aIp6Addr); |
| |
| if (memcmp(&aMacAddr.mExtAddress, netif.GetMac().GetExtAddress(), sizeof(aMacAddr.mExtAddress)) != 0) |
| { |
| aMacAddr.mLength = sizeof(aMacAddr.mShortAddress); |
| aMacAddr.mShortAddress = netif.GetMac().GetShortAddress(); |
| } |
| |
| return OT_ERROR_NONE; |
| } |
| |
| otError MeshForwarder::GetMacDestinationAddress(const Ip6::Address &aIp6Addr, Mac::Address &aMacAddr) |
| { |
| if (aIp6Addr.IsMulticast()) |
| { |
| aMacAddr.mLength = sizeof(aMacAddr.mShortAddress); |
| aMacAddr.mShortAddress = Mac::kShortAddrBroadcast; |
| } |
| else if (aIp6Addr.mFields.m16[0] == HostSwap16(0xfe80) && |
| aIp6Addr.mFields.m16[1] == HostSwap16(0x0000) && |
| aIp6Addr.mFields.m16[2] == HostSwap16(0x0000) && |
| aIp6Addr.mFields.m16[3] == HostSwap16(0x0000) && |
| aIp6Addr.mFields.m16[4] == HostSwap16(0x0000) && |
| aIp6Addr.mFields.m16[5] == HostSwap16(0x00ff) && |
| aIp6Addr.mFields.m16[6] == HostSwap16(0xfe00)) |
| { |
| aMacAddr.mLength = sizeof(aMacAddr.mShortAddress); |
| aMacAddr.mShortAddress = HostSwap16(aIp6Addr.mFields.m16[7]); |
| } |
| else if (GetNetif().GetMle().IsRoutingLocator(aIp6Addr)) |
| { |
| aMacAddr.mLength = sizeof(aMacAddr.mShortAddress); |
| aMacAddr.mShortAddress = HostSwap16(aIp6Addr.mFields.m16[7]); |
| } |
| else |
| { |
| aMacAddr.mLength = sizeof(aMacAddr.mExtAddress); |
| aMacAddr.mExtAddress.Set(aIp6Addr); |
| } |
| |
| return OT_ERROR_NONE; |
| } |
| |
| otError MeshForwarder::HandleFrameRequest(Mac::Sender &aSender, Mac::Frame &aFrame) |
| { |
| return GetOwner(aSender).HandleFrameRequest(aFrame); |
| } |
| |
| otError MeshForwarder::HandleFrameRequest(Mac::Frame &aFrame) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| Mac::Address macDest; |
| Child *child = NULL; |
| |
| VerifyOrExit(mEnabled, error = OT_ERROR_ABORT); |
| |
| mSendBusy = true; |
| |
| if (mSendMessage == NULL) |
| { |
| SendEmptyFrame(aFrame, false); |
| aFrame.SetIsARetransmission(false); |
| aFrame.SetMaxTxAttempts(Mac::kDirectFrameMacTxAttempts); |
| ExitNow(); |
| } |
| |
| switch (mSendMessage->GetType()) |
| { |
| case Message::kTypeIp6: |
| if (mSendMessage->GetSubType() == Message::kSubTypeMleDiscoverRequest) |
| { |
| netif.GetMac().SetChannel(mScanChannel); |
| aFrame.SetChannel(mScanChannel); |
| |
| // In case a specific PAN ID of a Thread Network to be discovered is not known, Discovery |
| // Request messages MUST have the Destination PAN ID in the IEEE 802.15.4 MAC header set |
| // to be the Broadcast PAN ID (0xFFFF) and the Source PAN ID set to a randomly generated |
| // value. |
| if (mSendMessage->GetPanId() == Mac::kPanIdBroadcast && |
| netif.GetMac().GetPanId() == Mac::kPanIdBroadcast) |
| { |
| uint16_t panid; |
| |
| do |
| { |
| panid = static_cast<uint16_t>(otPlatRandomGet()); |
| } |
| while (panid == Mac::kPanIdBroadcast); |
| |
| netif.GetMac().SetPanId(panid); |
| } |
| } |
| |
| error = SendFragment(*mSendMessage, aFrame); |
| |
| // `SendFragment()` fails with `NotCapable` error if the message is MLE (with |
| // no link layer security) and also requires fragmentation. |
| if (error == OT_ERROR_NOT_CAPABLE) |
| { |
| // Enable security and try again. |
| mSendMessage->SetLinkSecurityEnabled(true); |
| error = SendFragment(*mSendMessage, aFrame); |
| } |
| |
| assert(aFrame.GetLength() != 7); |
| break; |
| |
| case Message::kType6lowpan: |
| error = SendMesh(*mSendMessage, aFrame); |
| break; |
| |
| case Message::kTypeMacDataPoll: |
| error = SendPoll(*mSendMessage, aFrame); |
| break; |
| |
| case Message::kTypeSupervision: |
| error = SendEmptyFrame(aFrame, kSupervisionMsgAckRequest); |
| mMessageNextOffset = mSendMessage->GetLength(); |
| break; |
| } |
| |
| assert(error == OT_ERROR_NONE); |
| |
| aFrame.GetDstAddr(macDest); |
| |
| // Set `FramePending` if there are more queued messages (excluding |
| // the current one being sent out) for the child (note `> 1` check). |
| // The case where the current message requires fragmentation is |
| // already checked and handled in `SendFragment()` method. |
| |
| if (((child = netif.GetMle().GetChild(macDest)) != NULL) |
| && !child->IsRxOnWhenIdle() |
| && (child->GetIndirectMessageCount() > 1)) |
| { |
| aFrame.SetFramePending(true); |
| } |
| |
| aFrame.SetIsARetransmission(mSendMessageIsARetransmission); |
| aFrame.SetMaxTxAttempts(mSendMessageMaxMacTxAttempts); |
| |
| if (mSendMessageIsARetransmission) |
| { |
| // If this is the re-transmission of an indirect frame to a sleepy child, we |
| // ensure to use the same frame counter, key id, and data sequence number as |
| // the last attempt. |
| |
| aFrame.SetSequence(mSendMessageDataSequenceNumber); |
| |
| if (aFrame.GetSecurityEnabled()) |
| { |
| aFrame.SetFrameCounter(mSendMessageFrameCounter); |
| aFrame.SetKeyId(mSendMessageKeyId); |
| } |
| } |
| |
| exit: |
| return error; |
| } |
| |
| otError MeshForwarder::SendPoll(Message &aMessage, Mac::Frame &aFrame) |
| { |
| ThreadNetif &netif = GetNetif(); |
| Mac::Address macSource; |
| uint16_t fcf; |
| Neighbor *neighbor; |
| |
| macSource.mShortAddress = netif.GetMac().GetShortAddress(); |
| |
| if (macSource.mShortAddress != Mac::kShortAddrInvalid) |
| { |
| macSource.mLength = sizeof(macSource.mShortAddress); |
| } |
| else |
| { |
| macSource.mLength = sizeof(macSource.mExtAddress); |
| memcpy(&macSource.mExtAddress, netif.GetMac().GetExtAddress(), sizeof(macSource.mExtAddress)); |
| } |
| |
| // initialize MAC header |
| fcf = Mac::Frame::kFcfFrameMacCmd | Mac::Frame::kFcfPanidCompression | Mac::Frame::kFcfFrameVersion2006; |
| |
| if (macSource.mLength == sizeof(Mac::ShortAddress)) |
| { |
| fcf |= Mac::Frame::kFcfDstAddrShort | Mac::Frame::kFcfSrcAddrShort; |
| } |
| else |
| { |
| fcf |= Mac::Frame::kFcfDstAddrExt | Mac::Frame::kFcfSrcAddrExt; |
| } |
| |
| fcf |= Mac::Frame::kFcfAckRequest | Mac::Frame::kFcfSecurityEnabled; |
| |
| aFrame.InitMacHeader(fcf, Mac::Frame::kKeyIdMode1 | Mac::Frame::kSecEncMic32); |
| aFrame.SetDstPanId(netif.GetMac().GetPanId()); |
| |
| neighbor = netif.GetMle().GetParent(); |
| assert(neighbor != NULL); |
| |
| if (macSource.mLength == 2) |
| { |
| aFrame.SetDstAddr(neighbor->GetRloc16()); |
| aFrame.SetSrcAddr(macSource.mShortAddress); |
| } |
| else |
| { |
| aFrame.SetDstAddr(neighbor->GetExtAddress()); |
| aFrame.SetSrcAddr(macSource.mExtAddress); |
| } |
| |
| aFrame.SetCommandId(Mac::Frame::kMacCmdDataRequest); |
| |
| mMessageNextOffset = aMessage.GetLength(); |
| |
| return OT_ERROR_NONE; |
| } |
| |
| otError MeshForwarder::SendMesh(Message &aMessage, Mac::Frame &aFrame) |
| { |
| ThreadNetif &netif = GetNetif(); |
| uint16_t fcf; |
| |
| // initialize MAC header |
| fcf = Mac::Frame::kFcfFrameData | Mac::Frame::kFcfPanidCompression | Mac::Frame::kFcfFrameVersion2006 | |
| Mac::Frame::kFcfDstAddrShort | Mac::Frame::kFcfSrcAddrShort | |
| Mac::Frame::kFcfAckRequest | Mac::Frame::kFcfSecurityEnabled; |
| |
| aFrame.InitMacHeader(fcf, Mac::Frame::kKeyIdMode1 | Mac::Frame::kSecEncMic32); |
| aFrame.SetDstPanId(netif.GetMac().GetPanId()); |
| aFrame.SetDstAddr(mMacDest.mShortAddress); |
| aFrame.SetSrcAddr(mMacSource.mShortAddress); |
| |
| // write payload |
| assert(aMessage.GetLength() <= aFrame.GetMaxPayloadLength()); |
| aMessage.Read(0, aMessage.GetLength(), aFrame.GetPayload()); |
| aFrame.SetPayloadLength(static_cast<uint8_t>(aMessage.GetLength())); |
| |
| mMessageNextOffset = aMessage.GetLength(); |
| |
| return OT_ERROR_NONE; |
| } |
| |
| otError MeshForwarder::SendFragment(Message &aMessage, Mac::Frame &aFrame) |
| { |
| ThreadNetif &netif = GetNetif(); |
| Mac::Address meshDest, meshSource; |
| uint16_t fcf; |
| Lowpan::FragmentHeader *fragmentHeader; |
| Lowpan::MeshHeader meshHeader; |
| uint8_t *payload; |
| uint8_t headerLength; |
| uint8_t hopsLeft; |
| uint16_t payloadLength; |
| int hcLength; |
| uint16_t fragmentLength; |
| uint16_t dstpan; |
| uint8_t secCtl = Mac::Frame::kSecNone; |
| otError error = OT_ERROR_NONE; |
| |
| if (mAddMeshHeader) |
| { |
| meshSource.mLength = sizeof(meshSource.mShortAddress); |
| meshSource.mShortAddress = mMeshSource; |
| meshDest.mLength = sizeof(meshDest.mShortAddress); |
| meshDest.mShortAddress = mMeshDest; |
| } |
| else |
| { |
| meshDest = mMacDest; |
| meshSource = mMacSource; |
| } |
| |
| // initialize MAC header |
| fcf = Mac::Frame::kFcfFrameData | Mac::Frame::kFcfFrameVersion2006; |
| fcf |= (mMacDest.mLength == 2) ? Mac::Frame::kFcfDstAddrShort : Mac::Frame::kFcfDstAddrExt; |
| fcf |= (mMacSource.mLength == 2) ? Mac::Frame::kFcfSrcAddrShort : Mac::Frame::kFcfSrcAddrExt; |
| |
| // all unicast frames request ACK |
| if (mMacDest.mLength == 8 || mMacDest.mShortAddress != Mac::kShortAddrBroadcast) |
| { |
| fcf |= Mac::Frame::kFcfAckRequest; |
| } |
| |
| if (aMessage.IsLinkSecurityEnabled()) |
| { |
| fcf |= Mac::Frame::kFcfSecurityEnabled; |
| |
| switch (aMessage.GetSubType()) |
| { |
| case Message::kSubTypeJoinerEntrust: |
| secCtl = static_cast<uint8_t>(Mac::Frame::kKeyIdMode0); |
| break; |
| |
| case Message::kSubTypeMleAnnounce: |
| secCtl = static_cast<uint8_t>(Mac::Frame::kKeyIdMode2); |
| break; |
| |
| default: |
| secCtl = static_cast<uint8_t>(Mac::Frame::kKeyIdMode1); |
| break; |
| } |
| |
| secCtl |= Mac::Frame::kSecEncMic32; |
| } |
| |
| dstpan = netif.GetMac().GetPanId(); |
| |
| switch (aMessage.GetSubType()) |
| { |
| case Message::kSubTypeMleAnnounce: |
| aFrame.SetChannel(aMessage.GetChannel()); |
| dstpan = Mac::kPanIdBroadcast; |
| break; |
| |
| case Message::kSubTypeMleDiscoverRequest: |
| case Message::kSubTypeMleDiscoverResponse: |
| dstpan = aMessage.GetPanId(); |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (dstpan == netif.GetMac().GetPanId()) |
| { |
| fcf |= Mac::Frame::kFcfPanidCompression; |
| } |
| |
| aFrame.InitMacHeader(fcf, secCtl); |
| aFrame.SetDstPanId(dstpan); |
| aFrame.SetSrcPanId(netif.GetMac().GetPanId()); |
| |
| if (mMacDest.mLength == 2) |
| { |
| aFrame.SetDstAddr(mMacDest.mShortAddress); |
| } |
| else |
| { |
| aFrame.SetDstAddr(mMacDest.mExtAddress); |
| } |
| |
| if (mMacSource.mLength == 2) |
| { |
| aFrame.SetSrcAddr(mMacSource.mShortAddress); |
| } |
| else |
| { |
| aFrame.SetSrcAddr(mMacSource.mExtAddress); |
| } |
| |
| payload = aFrame.GetPayload(); |
| |
| headerLength = 0; |
| |
| // initialize Mesh header |
| if (mAddMeshHeader) |
| { |
| if (netif.GetMle().GetRole() == OT_DEVICE_ROLE_CHILD) |
| { |
| // REED sets hopsLeft to max (16) + 1. It does not know the route cost. |
| hopsLeft = Mle::kMaxRouteCost + 1; |
| } |
| else |
| { |
| // Calculate the number of predicted hops. |
| hopsLeft = netif.GetMle().GetRouteCost(mMeshDest); |
| |
| if (hopsLeft != Mle::kMaxRouteCost) |
| { |
| hopsLeft += netif.GetMle().GetLinkCost( |
| netif.GetMle().GetRouterId(netif.GetMle().GetNextHop(mMeshDest))); |
| } |
| else |
| { |
| // In case there is no route to the destination router (only link). |
| hopsLeft = netif.GetMle().GetLinkCost(netif.GetMle().GetRouterId(mMeshDest)); |
| } |
| |
| } |
| |
| // The hopsLft field MUST be incremented by one if the destination RLOC16 |
| // is not that of an active Router. |
| if (!netif.GetMle().IsActiveRouter(mMeshDest)) |
| { |
| hopsLeft += 1; |
| } |
| |
| meshHeader.Init(); |
| meshHeader.SetHopsLeft(hopsLeft + Lowpan::MeshHeader::kAdditionalHopsLeft); |
| meshHeader.SetSource(mMeshSource); |
| meshHeader.SetDestination(mMeshDest); |
| meshHeader.AppendTo(payload); |
| payload += meshHeader.GetHeaderLength(); |
| headerLength += meshHeader.GetHeaderLength(); |
| } |
| |
| // copy IPv6 Header |
| if (aMessage.GetOffset() == 0) |
| { |
| hcLength = netif.GetLowpan().Compress(aMessage, meshSource, meshDest, payload); |
| assert(hcLength > 0); |
| headerLength += static_cast<uint8_t>(hcLength); |
| |
| payloadLength = aMessage.GetLength() - aMessage.GetOffset(); |
| |
| fragmentLength = aFrame.GetMaxPayloadLength() - headerLength; |
| |
| if (payloadLength > fragmentLength) |
| { |
| if ((!aMessage.IsLinkSecurityEnabled()) && aMessage.IsSubTypeMle()) |
| { |
| aMessage.SetOffset(0); |
| ExitNow(error = OT_ERROR_NOT_CAPABLE); |
| } |
| |
| // write Fragment header |
| if (aMessage.GetDatagramTag() == 0) |
| { |
| // avoid using datagram tag value 0, which indicates the tag has not been set |
| if (mFragTag == 0) |
| { |
| mFragTag++; |
| } |
| |
| aMessage.SetDatagramTag(mFragTag++); |
| } |
| |
| memmove(payload + 4, payload, headerLength); |
| |
| payloadLength = (aFrame.GetMaxPayloadLength() - headerLength - 4) & ~0x7; |
| |
| fragmentHeader = reinterpret_cast<Lowpan::FragmentHeader *>(payload); |
| fragmentHeader->Init(); |
| fragmentHeader->SetDatagramSize(aMessage.GetLength()); |
| fragmentHeader->SetDatagramTag(aMessage.GetDatagramTag()); |
| fragmentHeader->SetDatagramOffset(0); |
| |
| payload += fragmentHeader->GetHeaderLength(); |
| headerLength += fragmentHeader->GetHeaderLength(); |
| } |
| |
| payload += hcLength; |
| |
| // copy IPv6 Payload |
| aMessage.Read(aMessage.GetOffset(), payloadLength, payload); |
| aFrame.SetPayloadLength(static_cast<uint8_t>(headerLength + payloadLength)); |
| |
| mMessageNextOffset = aMessage.GetOffset() + payloadLength; |
| aMessage.SetOffset(0); |
| } |
| else |
| { |
| payloadLength = aMessage.GetLength() - aMessage.GetOffset(); |
| |
| // write Fragment header |
| fragmentHeader = reinterpret_cast<Lowpan::FragmentHeader *>(payload); |
| fragmentHeader->Init(); |
| fragmentHeader->SetDatagramSize(aMessage.GetLength()); |
| fragmentHeader->SetDatagramTag(aMessage.GetDatagramTag()); |
| fragmentHeader->SetDatagramOffset(aMessage.GetOffset()); |
| |
| payload += fragmentHeader->GetHeaderLength(); |
| headerLength += fragmentHeader->GetHeaderLength(); |
| |
| fragmentLength = (aFrame.GetMaxPayloadLength() - headerLength) & ~0x7; |
| |
| if (payloadLength > fragmentLength) |
| { |
| payloadLength = fragmentLength; |
| } |
| |
| // copy IPv6 Payload |
| aMessage.Read(aMessage.GetOffset(), payloadLength, payload); |
| aFrame.SetPayloadLength(static_cast<uint8_t>(headerLength + payloadLength)); |
| |
| mMessageNextOffset = aMessage.GetOffset() + payloadLength; |
| } |
| |
| if (mMessageNextOffset < aMessage.GetLength()) |
| { |
| aFrame.SetFramePending(true); |
| } |
| |
| exit: |
| |
| return error; |
| } |
| |
| otError MeshForwarder::SendEmptyFrame(Mac::Frame &aFrame, bool aAckRequest) |
| { |
| ThreadNetif &netif = GetNetif(); |
| uint16_t fcf; |
| uint8_t secCtl; |
| Mac::Address macSource; |
| |
| macSource.mShortAddress = netif.GetMac().GetShortAddress(); |
| |
| if (macSource.mShortAddress != Mac::kShortAddrInvalid) |
| { |
| macSource.mLength = sizeof(macSource.mShortAddress); |
| } |
| else |
| { |
| macSource.mLength = sizeof(macSource.mExtAddress); |
| memcpy(&macSource.mExtAddress, netif.GetMac().GetExtAddress(), sizeof(macSource.mExtAddress)); |
| } |
| |
| fcf = Mac::Frame::kFcfFrameData | Mac::Frame::kFcfFrameVersion2006; |
| fcf |= (mMacDest.mLength == 2) ? Mac::Frame::kFcfDstAddrShort : Mac::Frame::kFcfDstAddrExt; |
| fcf |= (macSource.mLength == 2) ? Mac::Frame::kFcfSrcAddrShort : Mac::Frame::kFcfSrcAddrExt; |
| |
| if (aAckRequest) |
| { |
| fcf |= Mac::Frame::kFcfAckRequest; |
| } |
| |
| fcf |= Mac::Frame::kFcfSecurityEnabled; |
| secCtl = Mac::Frame::kKeyIdMode1; |
| secCtl |= Mac::Frame::kSecEncMic32; |
| |
| fcf |= Mac::Frame::kFcfPanidCompression; |
| |
| aFrame.InitMacHeader(fcf, secCtl); |
| |
| aFrame.SetDstPanId(netif.GetMac().GetPanId()); |
| aFrame.SetSrcPanId(netif.GetMac().GetPanId()); |
| |
| if (mMacDest.mLength == 2) |
| { |
| aFrame.SetDstAddr(mMacDest.mShortAddress); |
| } |
| else |
| { |
| aFrame.SetDstAddr(mMacDest.mExtAddress); |
| } |
| |
| if (macSource.mLength == 2) |
| { |
| aFrame.SetSrcAddr(macSource.mShortAddress); |
| } |
| else |
| { |
| aFrame.SetSrcAddr(macSource.mExtAddress); |
| } |
| |
| aFrame.SetPayloadLength(0); |
| aFrame.SetFramePending(false); |
| |
| return OT_ERROR_NONE; |
| } |
| |
| void MeshForwarder::HandleSentFrame(Mac::Sender &aSender, Mac::Frame &aFrame, otError aError) |
| { |
| GetOwner(aSender).HandleSentFrame(aFrame, aError); |
| } |
| |
| void MeshForwarder::HandleSentFrame(Mac::Frame &aFrame, otError aError) |
| { |
| ThreadNetif &netif = GetNetif(); |
| Mac::Address macDest; |
| Child *child; |
| Neighbor *neighbor; |
| uint8_t childIndex; |
| |
| mSendBusy = false; |
| |
| VerifyOrExit(mEnabled); |
| |
| if (mSendMessage != NULL) |
| { |
| mSendMessage->SetOffset(mMessageNextOffset); |
| } |
| |
| aFrame.GetDstAddr(macDest); |
| |
| if ((neighbor = netif.GetMle().GetNeighbor(macDest)) != NULL) |
| { |
| switch (aError) |
| { |
| case OT_ERROR_NONE: |
| if (aFrame.GetAckRequest()) |
| { |
| neighbor->ResetLinkFailures(); |
| } |
| |
| break; |
| |
| case OT_ERROR_CHANNEL_ACCESS_FAILURE: |
| case OT_ERROR_ABORT: |
| break; |
| |
| case OT_ERROR_NO_ACK: |
| neighbor->IncrementLinkFailures(); |
| |
| if (netif.GetMle().IsActiveRouter(neighbor->GetRloc16())) |
| { |
| if (neighbor->GetLinkFailures() >= Mle::kFailedRouterTransmissions) |
| { |
| netif.GetMle().RemoveNeighbor(*neighbor); |
| } |
| } |
| |
| break; |
| |
| default: |
| assert(false); |
| break; |
| } |
| } |
| |
| if ((child = netif.GetMle().GetChild(macDest)) != NULL) |
| { |
| child->SetDataRequestPending(false); |
| |
| VerifyOrExit(mSendMessage != NULL); |
| |
| if (mSendMessage == child->GetIndirectMessage()) |
| { |
| if (aError == OT_ERROR_NONE) |
| { |
| child->ResetIndirectTxAttempts(); |
| } |
| else |
| { |
| child->IncrementIndirectTxAttempts(); |
| |
| if (child->GetIndirectTxAttempts() < kMaxPollTriggeredTxAttempts) |
| { |
| // We save the frame counter, key id, and data sequence number of |
| // current frame so we use the same values for the retransmission |
| // of the frame following the receipt of a data request command (data |
| // poll) from the sleepy child. |
| |
| child->SetIndirectDataSequenceNumber(aFrame.GetSequence()); |
| |
| if (aFrame.GetSecurityEnabled()) |
| { |
| uint32_t frameCounter; |
| uint8_t keyId; |
| |
| aFrame.GetFrameCounter(frameCounter); |
| child->SetIndirectFrameCounter(frameCounter); |
| |
| aFrame.GetKeyId(keyId); |
| child->SetIndirectKeyId(keyId); |
| } |
| |
| ExitNow(); |
| } |
| |
| child->ResetIndirectTxAttempts(); |
| |
| #if OPENTHREAD_CONFIG_DROP_MESSAGE_ON_FRAGMENT_TX_FAILURE |
| // We set the NextOffset to end of message, since there is no need to |
| // send any remaining fragments in the message to the child, if all tx |
| // attempts of current frame already failed. |
| |
| mMessageNextOffset = mSendMessage->GetLength(); |
| #endif |
| } |
| } |
| |
| if (mMessageNextOffset < mSendMessage->GetLength()) |
| { |
| if (mSendMessage == child->GetIndirectMessage()) |
| { |
| child->SetIndirectFragmentOffset(mMessageNextOffset); |
| } |
| } |
| else |
| { |
| if (mSendMessage == child->GetIndirectMessage()) |
| { |
| child->SetIndirectFragmentOffset(0); |
| child->SetIndirectMessage(NULL); |
| |
| // Enable short source address matching after the first indirect |
| // message transmission attempt to the child. We intentionally do |
| // not check for successful tx here to address the scenario where |
| // the child does receive "Child ID Response" but parent misses the |
| // 15.4 ack from child. If the "Child ID Response" does not make it |
| // to the child, then the child will need to send a new "Child ID |
| // Request" which will cause the parent to switch to using long |
| // address mode for source address matching. |
| |
| mSourceMatchController.SetSrcMatchAsShort(*child, true); |
| } |
| |
| childIndex = netif.GetMle().GetChildIndex(*child); |
| |
| if (mSendMessage->GetChildMask(childIndex)) |
| { |
| mSendMessage->ClearChildMask(childIndex); |
| mSourceMatchController.DecrementMessageCount(*child); |
| } |
| } |
| |
| if (aError == OT_ERROR_NONE) |
| { |
| netif.GetChildSupervisor().UpdateOnSend(*child); |
| } |
| } |
| |
| VerifyOrExit(mSendMessage != NULL); |
| |
| if (mSendMessage->GetDirectTransmission()) |
| { |
| |
| #if OPENTHREAD_CONFIG_DROP_MESSAGE_ON_FRAGMENT_TX_FAILURE |
| |
| if (aError != OT_ERROR_NONE) |
| { |
| // We set the NextOffset to end of message to avoid sending |
| // any remaining fragments in the message. |
| |
| mMessageNextOffset = mSendMessage->GetLength(); |
| } |
| |
| #endif |
| |
| if (mMessageNextOffset < mSendMessage->GetLength()) |
| { |
| mSendMessage->SetOffset(mMessageNextOffset); |
| } |
| else |
| { |
| mSendMessage->ClearDirectTransmission(); |
| mSendMessage->SetOffset(0); |
| } |
| |
| if (mSendMessage->GetSubType() == Message::kSubTypeMleDiscoverRequest) |
| { |
| mSendBusy = true; |
| mDiscoverTimer.Start(static_cast<uint16_t>(Mac::kScanDurationDefault)); |
| ExitNow(); |
| } |
| } |
| |
| if (mSendMessage->GetType() == Message::kTypeMacDataPoll) |
| { |
| neighbor = netif.GetMle().GetParent(); |
| |
| if (neighbor->GetState() == Neighbor::kStateInvalid) |
| { |
| mDataPollManager.StopPolling(); |
| netif.GetMle().BecomeDetached(); |
| } |
| else |
| { |
| mDataPollManager.HandlePollSent(aError); |
| } |
| } |
| |
| if (mMessageNextOffset >= mSendMessage->GetLength()) |
| { |
| LogIp6Message(kMessageTransmit, *mSendMessage, &macDest, aError); |
| |
| if (aError == OT_ERROR_NONE) |
| { |
| mIpCounters.mTxSuccess++; |
| } |
| else |
| { |
| mIpCounters.mTxFailure++; |
| } |
| } |
| |
| if (mSendMessage->GetDirectTransmission() == false && mSendMessage->IsChildPending() == false) |
| { |
| mSendQueue.Dequeue(*mSendMessage); |
| mSendMessage->Free(); |
| mSendMessage = NULL; |
| mMessageNextOffset = 0; |
| } |
| |
| exit: |
| |
| if (mEnabled) |
| { |
| mScheduleTransmissionTask.Post(); |
| } |
| } |
| |
| void MeshForwarder::SetDiscoverParameters(uint32_t aScanChannels) |
| { |
| mScanChannels = (aScanChannels == 0) ? static_cast<uint32_t>(Mac::kScanChannelsAll) : aScanChannels; |
| } |
| |
| void MeshForwarder::HandleDiscoverTimer(Timer &aTimer) |
| { |
| GetOwner(aTimer).HandleDiscoverTimer(); |
| } |
| |
| void MeshForwarder::HandleDiscoverTimer(void) |
| { |
| ThreadNetif &netif = GetNetif(); |
| |
| do |
| { |
| mScanChannels >>= 1; |
| mScanChannel++; |
| |
| if (mScanChannel > OT_RADIO_CHANNEL_MAX) |
| { |
| mSendQueue.Dequeue(*mSendMessage); |
| mSendMessage->Free(); |
| mSendMessage = NULL; |
| netif.GetMac().SetChannel(mRestoreChannel); |
| netif.GetMac().SetPanId(mRestorePanId); |
| mScanning = false; |
| netif.GetMle().HandleDiscoverComplete(); |
| ExitNow(); |
| } |
| } |
| while ((mScanChannels & 1) == 0); |
| |
| mSendMessage->SetDirectTransmission(); |
| |
| exit: |
| mSendBusy = false; |
| mScheduleTransmissionTask.Post(); |
| } |
| |
| void MeshForwarder::HandleReceivedFrame(Mac::Receiver &aReceiver, Mac::Frame &aFrame) |
| { |
| GetOwner(aReceiver).HandleReceivedFrame(aFrame); |
| } |
| |
| void MeshForwarder::HandleReceivedFrame(Mac::Frame &aFrame) |
| { |
| ThreadNetif &netif = GetNetif(); |
| ThreadMessageInfo messageInfo; |
| Mac::Address macDest; |
| Mac::Address macSource; |
| uint8_t *payload; |
| uint8_t payloadLength; |
| uint8_t commandId; |
| otError error = OT_ERROR_NONE; |
| char stringBuffer[Mac::Frame::kInfoStringSize]; |
| |
| if (!mEnabled) |
| { |
| ExitNow(error = OT_ERROR_INVALID_STATE); |
| } |
| |
| SuccessOrExit(error = aFrame.GetSrcAddr(macSource)); |
| SuccessOrExit(error = aFrame.GetDstAddr(macDest)); |
| |
| aFrame.GetSrcPanId(messageInfo.mPanId); |
| messageInfo.mChannel = aFrame.GetChannel(); |
| messageInfo.mRss = aFrame.GetPower(); |
| messageInfo.mLqi = aFrame.GetLqi(); |
| messageInfo.mLinkSecurity = aFrame.GetSecurityEnabled(); |
| |
| payload = aFrame.GetPayload(); |
| payloadLength = aFrame.GetPayloadLength(); |
| |
| netif.GetSupervisionListener().UpdateOnReceive(macSource, messageInfo.mLinkSecurity); |
| |
| mDataPollManager.CheckFramePending(aFrame); |
| |
| switch (aFrame.GetType()) |
| { |
| case Mac::Frame::kFcfFrameData: |
| if (payloadLength >= sizeof(Lowpan::MeshHeader) && |
| reinterpret_cast<Lowpan::MeshHeader *>(payload)->IsMeshHeader()) |
| { |
| HandleMesh(payload, payloadLength, macSource, messageInfo); |
| } |
| else if (payloadLength >= sizeof(Lowpan::FragmentHeader) && |
| reinterpret_cast<Lowpan::FragmentHeader *>(payload)->IsFragmentHeader()) |
| { |
| HandleFragment(payload, payloadLength, macSource, macDest, messageInfo); |
| } |
| else if (payloadLength >= 1 && Lowpan::Lowpan::IsLowpanHc(payload)) |
| { |
| HandleLowpanHC(payload, payloadLength, macSource, macDest, messageInfo); |
| } |
| else |
| { |
| VerifyOrExit(payloadLength == 0, error = OT_ERROR_NOT_LOWPAN_DATA_FRAME); |
| |
| otLogInfoMac(GetInstance(), "Received empty payload frame, %s", |
| aFrame.ToInfoString(stringBuffer, sizeof(stringBuffer))); |
| } |
| |
| break; |
| |
| case Mac::Frame::kFcfFrameMacCmd: |
| aFrame.GetCommandId(commandId); |
| |
| if (commandId == Mac::Frame::kMacCmdDataRequest) |
| { |
| HandleDataRequest(macSource, messageInfo); |
| } |
| else |
| { |
| error = OT_ERROR_DROP; |
| } |
| |
| break; |
| |
| default: |
| error = OT_ERROR_DROP; |
| break; |
| } |
| |
| exit: |
| |
| if (error != OT_ERROR_NONE) |
| { |
| otLogInfoMac(GetInstance(), "Dropping rx frame, error:%s, %s", otThreadErrorToString(error), |
| aFrame.ToInfoString(stringBuffer, sizeof(stringBuffer))); |
| |
| } |
| |
| OT_UNUSED_VARIABLE(stringBuffer); |
| } |
| |
| void MeshForwarder::HandleMesh(uint8_t *aFrame, uint8_t aFrameLength, const Mac::Address &aMacSource, |
| const ThreadMessageInfo &aMessageInfo) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| Message *message = NULL; |
| Mac::Address meshDest; |
| Mac::Address meshSource; |
| Lowpan::MeshHeader meshHeader; |
| |
| // Check the mesh header |
| VerifyOrExit(meshHeader.Init(aFrame, aFrameLength) == OT_ERROR_NONE, error = OT_ERROR_DROP); |
| |
| // Security Check: only process Mesh Header frames that had security enabled. |
| VerifyOrExit(aMessageInfo.mLinkSecurity && meshHeader.IsValid(), error = OT_ERROR_SECURITY); |
| |
| meshSource.mLength = sizeof(meshSource.mShortAddress); |
| meshSource.mShortAddress = meshHeader.GetSource(); |
| meshDest.mLength = sizeof(meshDest.mShortAddress); |
| meshDest.mShortAddress = meshHeader.GetDestination(); |
| |
| if (meshDest.mShortAddress == netif.GetMac().GetShortAddress()) |
| { |
| aFrame += meshHeader.GetHeaderLength(); |
| aFrameLength -= meshHeader.GetHeaderLength(); |
| |
| if (reinterpret_cast<Lowpan::FragmentHeader *>(aFrame)->IsFragmentHeader()) |
| { |
| HandleFragment(aFrame, aFrameLength, meshSource, meshDest, aMessageInfo); |
| } |
| else if (Lowpan::Lowpan::IsLowpanHc(aFrame)) |
| { |
| HandleLowpanHC(aFrame, aFrameLength, meshSource, meshDest, aMessageInfo); |
| } |
| else |
| { |
| ExitNow(error = OT_ERROR_PARSE); |
| } |
| } |
| else if (meshHeader.GetHopsLeft() > 0) |
| { |
| netif.GetMle().ResolveRoutingLoops(aMacSource.mShortAddress, meshDest.mShortAddress); |
| |
| SuccessOrExit(error = CheckReachability(aFrame, aFrameLength, meshSource, meshDest)); |
| |
| meshHeader.SetHopsLeft(meshHeader.GetHopsLeft() - 1); |
| meshHeader.AppendTo(aFrame); |
| |
| VerifyOrExit((message = netif.GetIp6().mMessagePool.New(Message::kType6lowpan, 0)) != NULL, |
| error = OT_ERROR_NO_BUFS); |
| SuccessOrExit(error = message->SetLength(aFrameLength)); |
| message->Write(0, aFrameLength, aFrame); |
| message->SetLinkSecurityEnabled(aMessageInfo.mLinkSecurity); |
| message->SetPanId(aMessageInfo.mPanId); |
| |
| SendMessage(*message); |
| } |
| |
| exit: |
| |
| if (error != OT_ERROR_NONE) |
| { |
| char srcStringBuffer[Mac::Address::kAddressStringSize]; |
| |
| otLogInfoMac( |
| GetInstance(), |
| "Dropping rx mesh frame, error:%s, len:%d, src:%s, sec:%s", |
| otThreadErrorToString(error), |
| aFrameLength, |
| aMacSource.ToString(srcStringBuffer, sizeof(srcStringBuffer)), |
| aMessageInfo.mLinkSecurity ? "yes" : "no" |
| ); |
| |
| OT_UNUSED_VARIABLE(srcStringBuffer); |
| |
| if (message != NULL) |
| { |
| message->Free(); |
| } |
| } |
| } |
| |
| otError MeshForwarder::CheckReachability(uint8_t *aFrame, uint8_t aFrameLength, |
| const Mac::Address &aMeshSource, const Mac::Address &aMeshDest) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| Ip6::Header ip6Header; |
| Lowpan::MeshHeader meshHeader; |
| |
| VerifyOrExit(meshHeader.Init(aFrame, aFrameLength) == OT_ERROR_NONE, error = OT_ERROR_DROP); |
| |
| // skip mesh header |
| aFrame += meshHeader.GetHeaderLength(); |
| aFrameLength -= meshHeader.GetHeaderLength(); |
| |
| // skip fragment header |
| if (aFrameLength >= 1 && |
| reinterpret_cast<Lowpan::FragmentHeader *>(aFrame)->IsFragmentHeader()) |
| { |
| VerifyOrExit(sizeof(Lowpan::FragmentHeader) <= aFrameLength, error = OT_ERROR_DROP); |
| VerifyOrExit(reinterpret_cast<Lowpan::FragmentHeader *>(aFrame)->GetDatagramOffset() == 0); |
| |
| aFrame += reinterpret_cast<Lowpan::FragmentHeader *>(aFrame)->GetHeaderLength(); |
| aFrameLength -= reinterpret_cast<Lowpan::FragmentHeader *>(aFrame)->GetHeaderLength(); |
| } |
| |
| // only process IPv6 packets |
| VerifyOrExit(aFrameLength >= 1 && Lowpan::Lowpan::IsLowpanHc(aFrame)); |
| |
| VerifyOrExit(netif.GetLowpan().DecompressBaseHeader(ip6Header, aMeshSource, aMeshDest, aFrame, aFrameLength) > 0, |
| error = OT_ERROR_DROP); |
| |
| error = netif.GetMle().CheckReachability(aMeshSource.mShortAddress, aMeshDest.mShortAddress, ip6Header); |
| |
| exit: |
| return error; |
| } |
| |
| void MeshForwarder::HandleFragment(uint8_t *aFrame, uint8_t aFrameLength, |
| const Mac::Address &aMacSource, const Mac::Address &aMacDest, |
| const ThreadMessageInfo &aMessageInfo) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| Lowpan::FragmentHeader *fragmentHeader = reinterpret_cast<Lowpan::FragmentHeader *>(aFrame); |
| uint16_t datagramLength = fragmentHeader->GetDatagramSize(); |
| uint16_t datagramTag = fragmentHeader->GetDatagramTag(); |
| Message *message = NULL; |
| int headerLength; |
| |
| if (fragmentHeader->GetDatagramOffset() == 0) |
| { |
| aFrame += fragmentHeader->GetHeaderLength(); |
| aFrameLength -= fragmentHeader->GetHeaderLength(); |
| |
| VerifyOrExit((message = netif.GetIp6().mMessagePool.New(Message::kTypeIp6, 0)) != NULL, |
| error = OT_ERROR_NO_BUFS); |
| message->SetLinkSecurityEnabled(aMessageInfo.mLinkSecurity); |
| message->SetPanId(aMessageInfo.mPanId); |
| headerLength = netif.GetLowpan().Decompress(*message, aMacSource, aMacDest, aFrame, aFrameLength, |
| datagramLength); |
| VerifyOrExit(headerLength > 0, error = OT_ERROR_PARSE); |
| |
| aFrame += headerLength; |
| aFrameLength -= static_cast<uint8_t>(headerLength); |
| |
| VerifyOrExit(datagramLength >= message->GetOffset() + aFrameLength, error = OT_ERROR_PARSE); |
| |
| SuccessOrExit(error = message->SetLength(datagramLength)); |
| |
| message->SetDatagramTag(datagramTag); |
| message->SetTimeout(kReassemblyTimeout); |
| |
| // copy Fragment |
| message->Write(message->GetOffset(), aFrameLength, aFrame); |
| message->MoveOffset(aFrameLength); |
| |
| // Security Check |
| VerifyOrExit(netif.GetIp6Filter().Accept(*message), error = OT_ERROR_DROP); |
| |
| // Allow re-assembly of only one message at a time on a SED by clearing |
| // any remaining fragments in reassembly list upon receiving of a new |
| // (secure) first fragment. |
| |
| if ((GetRxOnWhenIdle() == false) && message->IsLinkSecurityEnabled()) |
| { |
| ClearReassemblyList(); |
| } |
| |
| mReassemblyList.Enqueue(*message); |
| |
| if (!mReassemblyTimer.IsRunning()) |
| { |
| mReassemblyTimer.Start(kStateUpdatePeriod); |
| } |
| } |
| else |
| { |
| aFrame += fragmentHeader->GetHeaderLength(); |
| aFrameLength -= fragmentHeader->GetHeaderLength(); |
| |
| for (message = mReassemblyList.GetHead(); message; message = message->GetNext()) |
| { |
| // Security Check: only consider reassembly buffers that had the same Security Enabled setting. |
| if (message->GetLength() == datagramLength && |
| message->GetDatagramTag() == datagramTag && |
| message->GetOffset() == fragmentHeader->GetDatagramOffset() && |
| message->IsLinkSecurityEnabled() == aMessageInfo.mLinkSecurity) |
| { |
| break; |
| } |
| } |
| |
| // For a sleepy-end-device, if we receive a new (secure) next fragment |
| // with a non-matching fragmentation offset or tag, it indicates that |
| // we have either missed a fragment, or the parent has moved to a new |
| // message with a new tag. In either case, we can safely clear any |
| // remaining fragments stored in the reassembly list. |
| |
| if (GetRxOnWhenIdle() == false) |
| { |
| if ((message == NULL) && (aMessageInfo.mLinkSecurity)) |
| { |
| ClearReassemblyList(); |
| } |
| } |
| |
| VerifyOrExit(message != NULL, error = OT_ERROR_DROP); |
| |
| // copy Fragment |
| message->Write(message->GetOffset(), aFrameLength, aFrame); |
| message->MoveOffset(aFrameLength); |
| } |
| |
| exit: |
| |
| if (error == OT_ERROR_NONE) |
| { |
| if (message->GetOffset() >= message->GetLength()) |
| { |
| mReassemblyList.Dequeue(*message); |
| HandleDatagram(*message, aMessageInfo, aMacSource); |
| } |
| } |
| else |
| { |
| char srcStringBuffer[Mac::Address::kAddressStringSize]; |
| char dstStringBuffer[Mac::Address::kAddressStringSize]; |
| |
| OT_UNUSED_VARIABLE(srcStringBuffer); |
| OT_UNUSED_VARIABLE(dstStringBuffer); |
| |
| otLogInfoMac( |
| GetInstance(), |
| "Dropping rx frag frame, error:%s, len:%d, src:%s, dst:%s, tag:%d, offset:%d, dglen:%d, sec:%s", |
| otThreadErrorToString(error), |
| aFrameLength, |
| aMacSource.ToString(srcStringBuffer, sizeof(srcStringBuffer)), |
| aMacDest.ToString(dstStringBuffer, sizeof(dstStringBuffer)), |
| datagramTag, |
| fragmentHeader->GetDatagramOffset(), |
| datagramLength, |
| aMessageInfo.mLinkSecurity ? "yes" : "no" |
| ); |
| |
| if (message != NULL) |
| { |
| message->Free(); |
| } |
| } |
| } |
| |
| void MeshForwarder::ClearReassemblyList(void) |
| { |
| Message *message; |
| Message *next; |
| |
| for (message = mReassemblyList.GetHead(); message; message = next) |
| { |
| next = message->GetNext(); |
| mReassemblyList.Dequeue(*message); |
| |
| LogIp6Message(kMessageDrop, *message, NULL, OT_ERROR_NO_FRAME_RECEIVED); |
| mIpCounters.mRxFailure++; |
| |
| message->Free(); |
| } |
| } |
| |
| void MeshForwarder::HandleReassemblyTimer(Timer &aTimer) |
| { |
| GetOwner(aTimer).HandleReassemblyTimer(); |
| } |
| |
| void MeshForwarder::HandleReassemblyTimer(void) |
| { |
| Message *next = NULL; |
| uint8_t timeout; |
| |
| for (Message *message = mReassemblyList.GetHead(); message; message = next) |
| { |
| next = message->GetNext(); |
| timeout = message->GetTimeout(); |
| |
| if (timeout > 0) |
| { |
| message->SetTimeout(timeout - 1); |
| } |
| else |
| { |
| mReassemblyList.Dequeue(*message); |
| |
| LogIp6Message(kMessageDrop, *message, NULL, OT_ERROR_REASSEMBLY_TIMEOUT); |
| mIpCounters.mRxFailure++; |
| |
| message->Free(); |
| } |
| } |
| |
| if (mReassemblyList.GetHead() != NULL) |
| { |
| mReassemblyTimer.Start(kStateUpdatePeriod); |
| } |
| } |
| |
| void MeshForwarder::HandleLowpanHC(uint8_t *aFrame, uint8_t aFrameLength, |
| const Mac::Address &aMacSource, const Mac::Address &aMacDest, |
| const ThreadMessageInfo &aMessageInfo) |
| { |
| ThreadNetif &netif = GetNetif(); |
| otError error = OT_ERROR_NONE; |
| Message *message; |
| int headerLength; |
| |
| VerifyOrExit((message = netif.GetIp6().mMessagePool.New(Message::kTypeIp6, 0)) != NULL, |
| error = OT_ERROR_NO_BUFS); |
| message->SetLinkSecurityEnabled(aMessageInfo.mLinkSecurity); |
| message->SetPanId(aMessageInfo.mPanId); |
| |
| headerLength = netif.GetLowpan().Decompress(*message, aMacSource, aMacDest, aFrame, aFrameLength, 0); |
| VerifyOrExit(headerLength > 0, error = OT_ERROR_PARSE); |
| |
| aFrame += headerLength; |
| aFrameLength -= static_cast<uint8_t>(headerLength); |
| |
| SuccessOrExit(error = message->SetLength(message->GetLength() + aFrameLength)); |
| message->Write(message->GetOffset(), aFrameLength, aFrame); |
| |
| // Security Check |
| VerifyOrExit(netif.GetIp6Filter().Accept(*message), error = OT_ERROR_DROP); |
| |
| exit: |
| |
| if (error == OT_ERROR_NONE) |
| { |
| HandleDatagram(*message, aMessageInfo, aMacSource); |
| } |
| else |
| { |
| char srcStringBuffer[Mac::Address::kAddressStringSize]; |
| char dstStringBuffer[Mac::Address::kAddressStringSize]; |
| |
| OT_UNUSED_VARIABLE(srcStringBuffer); |
| OT_UNUSED_VARIABLE(dstStringBuffer); |
| |
| otLogInfoMac( |
| GetInstance(), |
| "Dropping rx lowpan HC frame, error:%s, len:%d, src:%s, dst:%s, sec:%s", |
| otThreadErrorToString(error), |
| aFrameLength, |
| aMacSource.ToString(srcStringBuffer, sizeof(srcStringBuffer)), |
| aMacDest.ToString(dstStringBuffer, sizeof(dstStringBuffer)), |
| aMessageInfo.mLinkSecurity ? "yes" : "no" |
| ); |
| |
| if (message != NULL) |
| { |
| message->Free(); |
| } |
| } |
| } |
| |
| otError MeshForwarder::HandleDatagram(Message &aMessage, const ThreadMessageInfo &aMessageInfo, |
| const Mac::Address &aMacSource) |
| { |
| ThreadNetif &netif = GetNetif(); |
| |
| LogIp6Message(kMessageReceive, aMessage, &aMacSource, OT_ERROR_NONE); |
| mIpCounters.mRxSuccess++; |
| |
| return netif.GetIp6().HandleDatagram(aMessage, &netif, netif.GetInterfaceId(), &aMessageInfo, false); |
| } |
| |
| void MeshForwarder::HandleDataRequest(const Mac::Address &aMacSource, const ThreadMessageInfo &aMessageInfo) |
| { |
| ThreadNetif &netif = GetNetif(); |
| Child *child; |
| uint16_t indirectMsgCount; |
| |
| // Security Check: only process secure Data Poll frames. |
| VerifyOrExit(aMessageInfo.mLinkSecurity); |
| |
| VerifyOrExit(netif.GetMle().GetRole() != OT_DEVICE_ROLE_DETACHED); |
| |
| VerifyOrExit((child = netif.GetMle().GetChild(aMacSource)) != NULL); |
| child->SetLastHeard(Timer::GetNow()); |
| child->ResetLinkFailures(); |
| indirectMsgCount = child->GetIndirectMessageCount(); |
| |
| if (!mSourceMatchController.IsEnabled() || (indirectMsgCount > 0)) |
| { |
| child->SetDataRequestPending(true); |
| } |
| |
| mScheduleTransmissionTask.Post(); |
| |
| otLogInfoMac(GetInstance(), "Rx data poll, src:0x%04x, qed_msgs:%d", child->GetRloc16(), indirectMsgCount); |
| |
| exit: |
| return; |
| } |
| |
| void MeshForwarder::HandleDataPollTimeout(Mac::Receiver &aReceiver) |
| { |
| GetOwner(aReceiver).GetDataPollManager().HandlePollTimeout(); |
| } |
| |
| MeshForwarder &MeshForwarder::GetOwner(const Context &aContext) |
| { |
| #if OPENTHREAD_ENABLE_MULTIPLE_INSTANCES |
| MeshForwarder &meshForwader = *static_cast<MeshForwarder *>(aContext.GetContext()); |
| #else |
| MeshForwarder &meshForwader = otGetMeshForwarder(); |
| OT_UNUSED_VARIABLE(aContext); |
| #endif |
| return meshForwader; |
| } |
| |
| #if (OPENTHREAD_CONFIG_LOG_LEVEL >= OT_LOG_LEVEL_INFO) && (OPENTHREAD_CONFIG_LOG_MAC == 1) |
| |
| void MeshForwarder::LogIp6Message(MessageAction aAction, const Message &aMessage, const Mac::Address *aMacAddress, |
| otError aError) |
| { |
| uint16_t checksum = 0; |
| Ip6::Header ip6Header; |
| Ip6::IpProto protocol; |
| char stringBuffer[Ip6::Address::kIp6AddressStringSize]; |
| const char *actionText; |
| const char *priorityText; |
| bool shouldLogSrcDstAddresses = true; |
| |
| VerifyOrExit(aMessage.GetType() == Message::kTypeIp6); |
| |
| VerifyOrExit(sizeof(ip6Header) == aMessage.Read(0, sizeof(ip6Header), &ip6Header)); |
| VerifyOrExit(ip6Header.IsVersion6()); |
| |
| protocol = ip6Header.GetNextHeader(); |
| |
| switch (protocol) |
| { |
| case Ip6::kProtoUdp: |
| { |
| Ip6::UdpHeader udpHeader; |
| |
| if (sizeof(udpHeader) == aMessage.Read(sizeof(ip6Header), sizeof(udpHeader), &udpHeader)) |
| { |
| checksum = udpHeader.GetChecksum(); |
| } |
| |
| break; |
| } |
| |
| case Ip6::kProtoTcp: |
| { |
| Ip6::TcpHeader tcpHeader; |
| |
| if (sizeof(tcpHeader) == aMessage.Read(sizeof(ip6Header), sizeof(tcpHeader), &tcpHeader)) |
| { |
| checksum = tcpHeader.GetChecksum(); |
| } |
| |
| break; |
| } |
| |
| default: |
| break; |
| } |
| |
| switch (aAction) |
| { |
| case kMessageReceive: |
| actionText = "Received"; |
| break; |
| |
| case kMessageTransmit: |
| if (aError == OT_ERROR_NONE) |
| { |
| actionText = "Sent"; |
| } |
| else |
| { |
| actionText = "Failed to send"; |
| } |
| |
| break; |
| |
| case kMessagePrepareIndirect: |
| actionText = "Preping indir tx"; |
| shouldLogSrcDstAddresses = false; |
| break; |
| |
| case kMessageDrop: |
| actionText = "Dropping"; |
| break; |
| |
| default: |
| actionText = ""; |
| break; |
| } |
| |
| switch (aMessage.GetPriority()) |
| { |
| case Message::kPriorityHigh: |
| priorityText = "high"; |
| break; |
| |
| case Message::kPriorityMedium: |
| priorityText = "medium"; |
| break; |
| |
| case Message::kPriorityLow: |
| priorityText = "low"; |
| break; |
| |
| case Message::kPriorityVeryLow: |
| priorityText = "verylow"; |
| break; |
| |
| default: |
| priorityText = "unknown"; |
| break; |
| } |
| |
| otLogInfoMac( |
| GetInstance(), |
| "%s IPv6 %s msg, len:%d, chksum:%04x%s%s, sec:%s%s%s, prio:%s", |
| actionText, |
| Ip6::Ip6::IpProtoToString(protocol), |
| aMessage.GetLength(), |
| checksum, |
| (aMacAddress == NULL) ? "" : ((aAction == kMessageReceive) ? ", from:" : ", to:"), |
| (aMacAddress == NULL) ? "" : aMacAddress->ToString(stringBuffer, sizeof(stringBuffer)), |
| aMessage.IsLinkSecurityEnabled() ? "yes" : "no", |
| (aError == OT_ERROR_NONE) ? "" : ", error:", |
| (aError == OT_ERROR_NONE) ? "" : otThreadErrorToString(aError), |
| priorityText |
| ); |
| |
| if (shouldLogSrcDstAddresses) |
| { |
| otLogInfoMac(GetInstance(), "src: %s", ip6Header.GetSource().ToString(stringBuffer, sizeof(stringBuffer))); |
| otLogInfoMac(GetInstance(), "dst: %s", ip6Header.GetDestination().ToString(stringBuffer, sizeof(stringBuffer))); |
| } |
| |
| exit: |
| return; |
| } |
| |
| #else // #if (OPENTHREAD_CONFIG_LOG_LEVEL >= OT_LOG_LEVEL_INFO) && (OPENTHREAD_CONFIG_LOG_MAC == 1) |
| |
| void MeshForwarder::LogIp6Message(MessageAction, const Message &, const Mac::Address *, otError) |
| { |
| } |
| |
| #endif //#if OPENTHREAD_CONFIG_LOG_LEVEL >= OT_LOG_LEVEL_INFO |
| |
| } // namespace ot |
