Active Endpoint Response missing

[eskomj]

Hello,

When using device as temperature measurement server and device joins to the network where coordinator is also trust center, joining to the network works fine, but binding not. I wander, why device don't send Active Enpoint Response message when it gets the active endpoint request from the coordinator. There is no response function in zsdk but ZbZdoActiveEpReq is. I suppose, this is because the stack should send response automatically. I have understood that when using find and bind identifyQuery is different matter. 

This belongs to my ealier post . Joining to the network works fine and device confirms key with success, but the problem seems to be binding now.

Specification says:

"The Active_EP_req command is generated from a local device wishing to acquire the list of endpoints on a remote device with simple descriptors

Upon receipt of this command, the recipient device shall process the command and generate an Active_EP_rsp command in response, according to the description in section"

Esko

[Ouadi]

Hello @eskomj ,

Could you please share the Trust center link key and the network key so I can decrypt exchanged messages on you capture ?

Kind regards,

Ouadi

[eskomj]

Hello,

Here is the link key

// Using the ZigBeeAlliance09 5a:69:67:42:65:65:41:6c:6c:69:61:6e:63:65:30:39) 

memcpy(config.security.distributedGlobalKey, sec_key_ha, ZB_SEC_KEYSIZE);

The network key is not set, because startUpControl is starttypeJoin and there is said in startup.h:

// Only applicable if startupControl is ZbStartTypePreconfigured.

If I try with OnOff server it handels the active endpoint request and the simple descriptor requests and logs after joining:

[M4 APPLICATION] ZbStartup Callback (status = 0x00)
[M4 APPLICATION] Startup done !

[M0] [00000017.918][PLATFORM] ZbApsBindTick : ZDO IEEE ADDR request (0x0000) to verify address map for binding entry (0x9035eafffef257cc)
[M0] [00000018.131][PLATFORM] ZbApsBindTick : ZDO IEEE ADDR request (0x0000) to verify address map for binding entry (0x9035eafffef257cc)

[Ouadi]

Hi @eskomj,

The preconfigured global key is used to encrypt the network key generated by the trust center and sent over a key-transport to all joined devices. this network key is needed to decrypt packets on Wireshark capture. 

You can retrieve the used network key via the API : ZbNwkGetActiveKey()

In the other side, I tried using ZbZdoActiveEpReq sent from a Zigbee_TempMeas_Server_Coord to a Zigbee_TempMeas_Client_Router and the response is generated and received on the coordinator side successfully according to the spec. 

BR,

Ouadi

[eskomj]

Hello,

I got this key:

[M4 APPLICATION] Network key 2002ff8a 

with code:

bool tulos = ZbNwkGetActiveKey(zigbee_app_info.zb, zigbee_app_info.secMaterial);

if (tulos) APP_DBG("Network key %x", zigbee_app_info.secMaterial->key);

May be the reason for the problem is that TempMeasServer is type 2 Server which is reporting one.  How can I see from the Nedis sensor's Wireshark capture does it work as client? I suppose, OnOff server responds, because it is Type 1 server.

[Ouadi]

Hi,

The Network key size is 128-bits, please find below the implementation of ZbNwkGetActiveKey to retrive the right network key :

      struct ZbNwkSecMaterialT *active_key = NULL;
      static char strBuf[64];
      active_key->keyType = ZB_SEC_KEYTYPE_STANDARD_NWK;
      ZbNwkGetActiveKey(zigbee_app_info.zb, active_key);
      for(int i=0; i<ZB_SEC_KEYSIZE;i++){
    	  snprintf(&strBuf[i * 2], 3, "%02X", active_key->key[i]);
      }
      APP_DBG("   Network Key: %s", strBuf);

What do you mean by type 2 server and type 1 server ? could you try to test by connecting only TempMeas device ?

Waiting for your network key to analyze further the Wireshark capture.

Regards,

Ouadi

[eskomj]

Hello,

With your code, I'll get this:

[M4 APPLICATION] Network Key: 0320416A0008698A0008778A00087D8A

I mean by types what is said in the Zigbee cluster library specification:

"Type 1 Cluster: A type 1 cluster’s primary function is to initiate transactions from the client to the server.
Type 2 Cluster: A type 2 cluster’s primary function is to initiate transactions from the server to the client."

[eskomj]

Hello,

The cluster id which is included in the Active endpoint request is 0x0005, which is scenes cluster. In order to reply there should be the scenes cluster?

Esko

[Ouadi]

Hi,

ZDO commands have their own clusters ID and are not associated to ZCL clusters ID , as for example  Active Endpoints Request  => Cluster ID : 0x0005 and Match Descriptor Request => Cluster ID : 0x0006

If we compare Zigbee_TempMeas vs Zigbee_OnOff wireshark captures, I noticed that the basic attributes are not set with the same configuration, I think that the issue could be caused by the capabilities of your device which are not set correctly as the gateway expects. 

Is your device RFD or FFD ?

Also I noticed in file "stm32wb_Zigbee_onoff_server_coord_2.pcapng" that the device does not respond to active end point request, however the join seems to work after that. 

Regards,

Ouadi