c - CC253x固件的非标准ZCL软件包支持

我的问题是：
livolo开关有自己的zigbee门。我想把它们从Zigbee2mqtt连接到CC2531 USB加密狗。一般来说，它可以工作，但是当我打开/关闭开关按钮（在物理设备上）时，开关会发送一个错误的zcl包。
我在微控制器编程和Zigbee架构方面绝对是个新手。所以我希望有人能帮我回答这些问题：
我在哪里可以截获那个畸形的包裹？
如何修复该包以支持zigbee标准？
我使用z-stack-home 1.2.2a固件，并按此处所述编译它：
https://github.com/Koenkk/Z-Stack-firmware/blob/master/coordinator/Z-Stack_Home_1.2/COMPILE.md

// Malformed ZCL package
// header
0x7c, // [0111 1100]
      // 01 - frame type = "Command is specific or local to a cluster"
      // 1 - manufacturer spec = manufacturer code present
      // 1 - direction = "from server to client"
      // 1 - disable default response
      // 100 - reserved

0xd2, 0x15, // manufacturer
0xd8, // sequence
0x00, // read attrs command

// endpoint adress
0x12, 0x0f, 0x05, 0x18, 0x00, 0x4b, 0x12, 0x00,

0x22, 0x00, // ????? need more data from another switches

0x03 // 0x00|0x01|0x02|0x03 - switch state

升级版：
我想，我可以在afincomingdata函数中截取af.c文件中的消息，并在afbuildmsgincoming中修复它。
所以现在我希望有人能帮我找到正确的信息格式。可加工成标准的ZCL包装机。

void afIncomingData( aps_FrameFormat_t *aff, zAddrType_t *SrcAddress, uint16 SrcPanId,
                     NLDE_Signal_t *sig, uint8 nwkSeqNum, uint8 SecurityUse,
                     uint32 timestamp, uint8 radius )
{
  endPointDesc_t *epDesc = NULL;
  epList_t *pList = epList;
#if !defined ( APS_NO_GROUPS )
  uint8 grpEp = APS_GROUPS_EP_NOT_FOUND;
#endif

  if ( ((aff->FrmCtrl & APS_DELIVERYMODE_MASK) == APS_FC_DM_GROUP) )
  {
#if !defined ( APS_NO_GROUPS )
    // Find the first endpoint for this group
    grpEp = aps_FindGroupForEndpoint( aff->GroupID, APS_GROUPS_FIND_FIRST );
    if ( grpEp == APS_GROUPS_EP_NOT_FOUND ) {
      // No endpoint found, default to endpoint 1.
      // In the original source code there is a return here.
      // This prevent the messags from being forwarded.
      // For our use-case we want to capture all messages.
      // Even if the coordinator is not in the group.
      epDesc = afFindEndPointDesc( 1 );
    }
    else {
      epDesc = afFindEndPointDesc( grpEp );
    }

    if ( epDesc == NULL )
      return;   // Endpoint descriptor not found

    pList = afFindEndPointDescList( epDesc->endPoint );
#else
    return; // Not supported
#endif
  }
  else if ( aff->DstEndPoint == AF_BROADCAST_ENDPOINT )
  {
    // Set the list
    if ( pList != NULL )
    {
      epDesc = pList->epDesc;
    }
  }
  else if ( aff->DstEndPoint == 10 || aff->DstEndPoint == 11 ) {
    if ( (epDesc = afFindEndPointDesc( 1 )) )
    {
      pList = afFindEndPointDescList( epDesc->endPoint );
    }
  }
  else if ( (epDesc = afFindEndPointDesc( aff->DstEndPoint )) )
  {
    pList = afFindEndPointDescList( epDesc->endPoint );
  }

  while ( epDesc )
  {
    uint16 epProfileID = 0xFFFE;  // Invalid Profile ID

    if ( pList->pfnDescCB )
    {
      uint16 *pID = (uint16 *)(pList->pfnDescCB(
                                 AF_DESCRIPTOR_PROFILE_ID, epDesc->endPoint ));
      if ( pID )
      {
        epProfileID = *pID;
        osal_mem_free( pID );
      }
    }
    else if ( epDesc->simpleDesc )
    {
      epProfileID = epDesc->simpleDesc->AppProfId;
    }

    // First part of verification is to make sure that:
    // the local Endpoint ProfileID matches the received ProfileID OR
    // the message is specifically send to ZDO (this excludes the broadcast endpoint) OR
    // if the Wildcard ProfileID is received the message should not be sent to ZDO endpoint
    if ( (aff->ProfileID == epProfileID) ||
         ((epDesc->endPoint == ZDO_EP) && (aff->ProfileID == ZDO_PROFILE_ID)) ||
         ((epDesc->endPoint != ZDO_EP) && ( aff->ProfileID == ZDO_WILDCARD_PROFILE_ID )) )
    {
      // Save original endpoint
      uint8 endpoint = aff->DstEndPoint;

      // overwrite with descriptor's endpoint
      aff->DstEndPoint = epDesc->endPoint;

      afBuildMSGIncoming( aff, epDesc, SrcAddress, SrcPanId, sig,
                         nwkSeqNum, SecurityUse, timestamp, radius );

      // Restore with original endpoint
      aff->DstEndPoint = endpoint;
    }

    if ( ((aff->FrmCtrl & APS_DELIVERYMODE_MASK) == APS_FC_DM_GROUP) )
    {
#if !defined ( APS_NO_GROUPS )
      // Find the next endpoint for this group
      grpEp = aps_FindGroupForEndpoint( aff->GroupID, grpEp );
      if ( grpEp == APS_GROUPS_EP_NOT_FOUND )
        return;   // No endpoint found

      epDesc = afFindEndPointDesc( grpEp );
      if ( epDesc == NULL )
        return;   // Endpoint descriptor not found

      pList = afFindEndPointDescList( epDesc->endPoint );
#else
      return;
#endif
    }
    else if ( aff->DstEndPoint == AF_BROADCAST_ENDPOINT )
    {
      pList = pList->nextDesc;
      if ( pList )
        epDesc = pList->epDesc;
      else
        epDesc = NULL;
    }
    else
      epDesc = NULL;
  }
}

static void afBuildMSGIncoming( aps_FrameFormat_t *aff, endPointDesc_t *epDesc,
                 zAddrType_t *SrcAddress, uint16 SrcPanId, NLDE_Signal_t *sig,
                 uint8 nwkSeqNum, uint8 SecurityUse, uint32 timestamp, uint8 radius )
{
  afIncomingMSGPacket_t *MSGpkt;
  const uint8 len = sizeof( afIncomingMSGPacket_t ) + aff->asduLength;
  uint8 *asdu = aff->asdu;
  MSGpkt = (afIncomingMSGPacket_t *)osal_msg_allocate( len );

  if ( MSGpkt == NULL )
  {
    return;
  }

  MSGpkt->hdr.event = AF_INCOMING_MSG_CMD;
  MSGpkt->groupId = aff->GroupID;
  MSGpkt->clusterId = aff->ClusterID;
  afCopyAddress( &MSGpkt->srcAddr, SrcAddress );
  MSGpkt->srcAddr.endPoint = aff->SrcEndPoint;
  MSGpkt->endPoint = epDesc->endPoint;
  MSGpkt->wasBroadcast = aff->wasBroadcast;
  MSGpkt->LinkQuality = sig->LinkQuality;
  MSGpkt->correlation = sig->correlation;
  MSGpkt->rssi = sig->rssi;
  MSGpkt->SecurityUse = SecurityUse;
  MSGpkt->timestamp = timestamp;
  MSGpkt->nwkSeqNum = nwkSeqNum;
  MSGpkt->macSrcAddr = aff->macSrcAddr;
  MSGpkt->macDestAddr = aff->macDestAddr;
  MSGpkt->srcAddr.panId = SrcPanId;
  MSGpkt->cmd.TransSeqNumber = 0;
  MSGpkt->cmd.DataLength = aff->asduLength;
  MSGpkt->radius = radius;

  if ( MSGpkt->cmd.DataLength )
  {
    MSGpkt->cmd.Data = (uint8 *)(MSGpkt + 1);
    osal_memcpy( MSGpkt->cmd.Data, asdu, MSGpkt->cmd.DataLength );
  }
  else
  {
    MSGpkt->cmd.Data = NULL;
  }

#if defined ( MT_AF_CB_FUNC )
  // If ZDO or SAPI have registered for this endpoint, dont intercept it here
  if (AFCB_CHECK(CB_ID_AF_DATA_IND, *(epDesc->task_id)))
  {
    MT_AfIncomingMsg( (void *)MSGpkt );
    // Release the memory.
    osal_msg_deallocate( (void *)MSGpkt );
  }
  else
#endif
  {
    // Send message through task message.
    osal_msg_send( *(epDesc->task_id), (uint8 *)MSGpkt );
  }
}

最佳答案

我认为你没有正确解码帧控制字节。看看我写的一些代码，我将其解释如下：

0x7c, // [0111 1100]
      // 011 - reserved
      // 1 - disable default response
      // 1 - direction = "from server to client"
      // 1 - manufacturer spec = manufacturer code present
      // 00 - frame type = "Command acts across entire profile"

这是基于一个旧的zcl规范（2008年左右？）在规范的更高版本中，保留位可能具有某种意义。
我相信制造商指定的位表明这不是标准的zigbee命令（读取属性）。如果它是读取属性，我认为它后面应该有偶数个字节（16位属性id）。
该帧的源和目标终结点、配置文件ID和群集ID是什么？
更新：
看起来您可以修改afIncomingData()来查看aff的字段，以识别这个确切的消息类型（帧控制、端点、群集、配置文件），然后将其交给您自己的函数进行处理（必要时进行响应）。
但我也会看一下MT_AF_CB_FUNC和MT_AfIncomingMsg()的文档，看看这是否是在自己的代码中识别要处理的帧的“官方”方法。