Bootstrap Write on client demo

[beaniebag]

I've been testing the Leshan client demo with a LwM2M Bootstrap server. The LwM2M Bootstrap server sends the Bootstrap write differently to the leshan Bootstrap server. Instead of the Uri-Path being /0/0 it sends it as /0 and puts the instance information in the TLV instead. I checked the OMA specifications 5.2.7.4 and this appears to be a valid case. This bootstrap write works on the wakaama client.

Here's a comparison:

LwM2M Server

Leshan Server

This is the error I'm getting from the leshan client demo

ERROR ObjectResource - Exception while handling request(CON-PUT    MID=57584, Token=4410C188A2C5321A, OptionSet={"Uri-Path":"0", "Content-Format":"application/vnd.oma.lwm2m+tlv"},
<Removed packets> ) on the /0 resource
java.lang.NullPointerException
        at org.eclipse.leshan.client.resource.ObjectEnabler.doWrite(ObjectEnabler.java:222)
        at org.eclipse.leshan.client.resource.BaseObjectEnabler.write(BaseObjectEnabler.java:211)
        at org.eclipse.leshan.client.californium.impl.ObjectResource.handlePUT(ObjectResource.java:231)
        at org.eclipse.californium.core.CoapResource.handleRequest(CoapResource.java:223)
        at org.eclipse.leshan.client.californium.impl.ObjectResource.handleRequest(ObjectResource.java:100)
        at org.eclipse.californium.core.server.ServerMessageDeliverer.deliverRequest(ServerMessageDeliverer.java:108)
        at org.eclipse.californium.core.network.stack.BaseCoapStack$StackTopAdapter.receiveRequest(BaseCoapStack.java:193)
        at org.eclipse.californium.core.network.stack.AbstractLayer.receiveRequest(AbstractLayer.java:81)
        at org.eclipse.californium.core.network.stack.AbstractLayer.receiveRequest(AbstractLayer.java:81)
        at org.eclipse.californium.core.network.stack.BlockwiseLayer.receiveRequest(BlockwiseLayer.java:391)
        at org.eclipse.californium.core.network.stack.ReliabilityLayer.receiveRequest(ReliabilityLayer.java:262)
        at org.eclipse.californium.core.network.stack.AbstractLayer.receiveRequest(AbstractLayer.java:81)
        at org.eclipse.californium.core.network.stack.BaseCoapStack.receiveRequest(BaseCoapStack.java:133)
        at org.eclipse.californium.core.network.CoapEndpoint$1.receiveRequest(CoapEndpoint.java:240)
        at org.eclipse.californium.core.network.UdpMatcher$2.run(UdpMatcher.java:251)
        at org.eclipse.californium.elements.util.SerialExecutor$1.run(SerialExecutor.java:277)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

[sbernard31]

You find a bug. Thx a lot for reporting this !

I create a PR #699 which should fix this, but it's not so easy to test for me. (As Leshan bootstrap server does not behave like this)

Could you check if this fix the issue ?

[beaniebag]

Excellent, I've tested it with the LwM2M Bootstrap server and the client demo was successfully able to bootstrap. Thanks for the quick fix :)

[sbernard31]

This PR is now integrated in master.

[sbernard31]

Thx again @beaniebag