Jon Shallow 31722c208a PSK: Make PSK hint / key / identity retrieval simpler ...

Make the retrieval of  PSK hint / key / identity items simpler, remove
duplicate coding, remove a set of memcpy() and handle all these internally
as coap_bin_const_t.

This removes the need for libcoap internally to allocate (potentially
limited) holding space for these items on the stack.

The respective (D)TLS interface modules then convert these items into
the format required for the underlying (D)TLS libraries.

If the underlying (D)TLS library indicates that there is insufficient
space for an item (defined by a max_len type parameter), then the item
is truncated to that size and a warning issued about the provided item
being too large for the underlying (D)TLS library.

The item access functions are now standalone, not indexed through
coap_context_t.

2021-10-01 17:46:56 +01:00

..

coap3

PSK: Make PSK hint / key / identity retrieval simpler

2021-10-01 17:46:56 +01:00