Is there a way to use Olaf's "coap-client" to do the ping?
I don't see an option, and it also doesn't seem to be commonly built
with DTLS.
No, I have a three lines of code for doing a ping, from pledge; not from
coap_client
Peter
Michael Richardson schreef op 2021-07-21 21:36:
Esko Dijk <esko.d...@iotconsultancy.nl> wrote:
There is already a "CoAP ping" described in RFC 7252 that can be
used. It does not access any resource, just the CoAP server endpoint
at
CoAP message layer. As a side effect of this ping your DTLS stack will
set up the connection which is handy.
I recalled that later in the day that CoAP "ping" is not connected to
CoAP
"echo" :-)
I think that there is also potentially a need for a way to debug
possible MTU
issues.
Is there a way to use Olaf's "coap-client" to do the ping?
I don't see an option, and it also doesn't seem to be commonly built
with DTLS.
We also have the issue of CCM8 vs OpenSSL that I thought got solved,
but it
appears that it has not been, so one needs a tool built with mbedtls or
wolfSSL.
So I don't think we need a resource at / that produces 2.05 , this is
for the maintainer of the server to decide how to allocate that
resource space.
Besides we have already defined some well-known resources accessible
with GET ( in core/est/brski) that the client could make use of to
test
connectivity.
Even a non-existing resource in the /.well-known/X space could be used
just to get a 4.04 which confirms the server is working properly. This
is even better that trying to GET a resource of who knows how large
size.
BTW, I've changed my /version.json so that it now looks for and returns
the
client certificate that it saw:
curl
--cert spec/files/product/00-D0-E5-02-00-2E/device.crt
--key spec/files/product/00-D0-E5-02-00-2E/key.pem
https://masa.honeydukes.sandelman.ca/version.json
->
{"version":"1.1.0","revision":"582044cfc536fd295e8bdcd3b90f30453d7784d3","Hostname":"masa.honeydukes.sandelman.ca","client_certificate":"-----BEGIN
CERTIFICATE-----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\n98DZjBIhz7W8LM52AeymMdCtsJyuDRjtVuncGEfMO/OWuFFx5qwYR63I\n-----END
CERTIFICATE-----\n"}
--
Michael Richardson <mcr+i...@sandelman.ca> . o O ( IPv6 IøT
consulting )
Sandelman Software Works Inc, Ottawa and Worldwide
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