Do not call coap_free_context() from within sigint handler.
Always call coap_io_process().
Use sys_arch_sem_wait() for timeouts while waiting for input.
When context is de-allocated, other threads can still access the
context lock held within context. Indicating being freed when
coap_free_context() was called worked in most cases, but not all.
Recursive lock issues happen for some of the app callbacks that then call a
libcoap public API that tries to lock up the CoAP context.
All libcoap callbacks into app code should now be fixed.
TLS1.3 is enabled by default in 3.6.0. This PR fixes the supported
encryption algorithms as well as handling a new session ticket
indication for coaps+tcp://.
However, if client certificates are not defined, then MbedTLS fails with
no certificate CA, even if the CA Cert is presented along with the Server
Cert during the processing of the server certificate and fails with
"SSL - No CA Chain is set, but required to operate"
when coaps+tcp:// is used.
Workaround (with examples/coap-client) is to set the -R options (when the
-c option is not set), or to programmatically call
coap_context_set_pki_root_cas();
Create new options coap_uri_into_optlist(), coap_path_into_optlist() and
coap_query_into_optlist() to be used instead of coap_uri_into_options(),
coap_split_path() and coap_split_query() functions so the requirement
for a scratch buffer is not needed.
Getting the minimum size for a scratch buffer is not straight forward and
potential for unexpected boundary condition errors to occurif too small.
Correct parsing and stripping out of "%2E%2E" ("..") and "%2E" (".")
path segments. ".." now removes the previous segment (if it exists).
Update documentation and unit testcases.
Update examples to use new options.
Set up lg_crcv if separate ACK response received for a coap_send() CON
request to be able to handle Block2 responses.
Handle Block1 request getting back a Block2 request that has an initial
separate response once the Block1 has completed by adjusting the stateless
token counter.
Separate response is typical for proxy support (OSCORE previously handled)..
Move requirements for client to determine how to set up the SNI for
PSK/PKI encrypted communications down into libcoap. The client just
needs to indicate the host to connect to in the client_sni field of
coap_dtls_cpsk_t or coap_dtls_pki_t.
New internal function coap_sanitize_client_sni() makes sure that
the SNI sent follows RFC 6066. As per
https://datatracker.ietf.org/doc/html/rfc6066#section-3
Literal IPv4 and IPv6 addresses are not permitted in "HostName".
all IPv4 and IPv6 addresses are dropped for the SNI, and so no SNI is
sent. DNS hostnames will get transmitted as the SNI.
Handle Observe cancellation with large blocked FETCH that needs to use
diffferent tokens when there is packet loss by checking the cache-key
if the token is not found (Q-Block1).
Let FETCH with Q-Block1 use NON now that cache-key is getting checked
if token mismatch.
Handle getting an unsolicited Observe response in the middle of
sending the FETCH blocks that ultimately will be doing the Observe
cancellation following re-assembly. (The unsolicited Observe token will
be the same token that is used to respond to the observe cancellation).
Move get_wkc_len() into hnd_get_wellknown_lkd() to simply document how
hnd_get_wellknown() should be done.
Revert out coap_register_print_wellknown_callback() changes as no
longer needed.
Update the Public API equivalent of the libcoap functions that need to be
called when locked with a name suffix of _lkd.
Move matching Public API functions out of coap_threadsafe.c to be coded
just ahead of the newly renamed _lkd function.
Properly define the _lkd function in the appropriate _internal.h file for
documentation, removing the #defines from coap_threadsafe_internal.h.
Tag all the Public API functions that have a _lkd function with COAP_API.
COAP_API can then be defined as to what should be done for that function.
Check libcoap library does not call the original Public API function when
it should be calling the _lkd function by marking the Public API not _lkd
functions as deprecated during the libcoap library build.
[Done by the new COAP_API being defined as __attribute__((deprecated)).]
Work in progress for all the functions that need to be multi-thread safe.
Update the Public API equivalent of the libcoap functions that need to be
called when locked with a name suffix of _lkd.
Move matching Public API functions out of coap_threadsafe.c to be coded
just ahead of the newly renamed _lkd function.
Properly define the _lkd function in the appropriate _internal.h file for
documentation, removing the #defines from coap_threadsafe_internal.h.
Tag all the Public API functions that have a _lkd function with COAP_API.
COAP_API can then be defined as to what should be done for that function.
Check libcoap library does not call the original Public API function when
it should be calling the _lkd function by marking the Public API not _lkd
functions as deprecated during the libcoap library build.
[Done by the new COAP_API being defined as __attribute__((deprecated)).]
Work in progress for all the functions that need to be multi-thread safe.
Update the Public API equivalent of the libcoap functions that need to be
called when locked with a name suffix of _lkd.
Move matching Public API functions out of coap_threadsafe.c to be coded
just ahead of the newly renamed _lkd function.
Properly define the _lkd function in the appropriate _internal.h file for
documentation, removing the #defines from coap_threadsafe_internal.h.
Tag all the Public API functions that have a _lkd function with COAP_API.
COAP_API can then be defined as to what should be done for that function.
Check libcoap library does not call the original Public API function when
it should be calling the _lkd function by marking the Public API not _lkd
functions as deprecated during the libcoap library build.
[Done by the new COAP_API being defined as __attribute__((deprecated)).]
Work in progress for all the functions that need to be multi-thread safe.
Update the Public API equivalent of the libcoap functions that need to be
called when locked with a name suffix of _lkd.
Move matching Public API functions out of coap_threadsafe.c to be coded
just ahead of the newly renamed _lkd function.
Properly define the _lkd function in the appropriate _internal.h file for
documentation, removing the #defines from coap_threadsafe_internal.h.
Tag all the Public API functions that have a _lkd function with COAP_API.
COAP_API can then be defined as to what should be done for that function.
Check libcoap library does not call the original Public API function when
it should be calling the _lkd function by marking the Public API not _lkd
functions as deprecated during the libcoap library build.
[Done by the new COAP_API being defined as __attribute__((deprecated)).]
Work in progress for all the functions that need to be multi-thread safe.
Jon Shallow