Device can join into a coordinator for which the permit-join has been turned off, why?

Luo David

Prodigy 110 points

Other Parts Discussed in Thread: Z-STACK

My test environment:

1. CC2530EB board with Z-Stack 2.5.1a

2. Only two devices one is the ZC another is ZE

my testing steps are:

1. let the ZC setup a PAN and let the ZE join it successfully

2. turn off the permit-join of ZC by send MT's MT_NLME_PERMIT_JOINING_REQ command

3. Restart the ZE device

the Result is:

1. ZC received the ZE's device annce

2. the ZDO_JoinIndicationCB didn't be triggered on ZC

3. ZE received ZC's successfull JoinConfirm

4. App on ZE can communicate with App on ZC successfully

I think it's strange why the ZC for which the permit-join has been turned off allow the restarted ZE device to join.

If restart the ZE by hold the SW5 key to clear the NV the Permit-Join of ZC will take effect.

thanks!

over 13 years ago

0 YiKai Chen over 13 years ago

Guru 735695 points

Hi,

Would you like to try ZDO_MGMT_PERMIT_JOIN_REQ MT command? I am doing fine with using it to turn on and off the permit join.

0 Luo David over 13 years ago in reply to YiKai Chen

Prodigy 110 points

That doesn't make sense, since the implementation are the same, and I've tesed it, and got the same result

0 YiKai Chen over 13 years ago in reply to Luo David

Guru 735695 points

Hi,

What is the value of duration that you gave when using MT_NLME_PERMIT_JOINING_REQ? Just want to see if I can help.

0 Dirty Harry over 13 years ago in reply to YiKai Chen

TI__Mastermind 19350 points

The behavior is specified by the ZigBee Spec - I don't have time to look up the exact paragraph, but you can take a look. The requirement is to allow this "back door" for a ZED to do a "re-join" - if you look on the sniffer, the ZED is not getting back into the ZC with a new join.

0 Luo David over 13 years ago in reply to Dirty Harry

Prodigy 110 points

Hi Harry,

I've found the description in the Spec, in page 230:

     Should the device be admitted to the PAN, the ZigBee
     router shall indicate this via the NLME-JOIN.confirm with SUCCESS
     status. If security is enabled on the network, the device
     application shall inform the Trust Center via the APSMEUPDATE-
     DEVICE.request.

And I traced the ZED's source code, it rejoined the PAN by calling NLME_OrphanJoinRequest().

Thank you!

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Device can join into a coordinator for which the permit-join has been turned off, why?