sys/net/gcoap: get rid of API abuse #21125
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I was so free to squash directly |
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Sure! There's actually still the same problem in the other doc comments. |
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Wait, there actually already is |
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Calling `coap_get_token()` and `coap_get_token_length()` on an (mostly) uninitialized `coap_pkt_t` did work so far due to implementation details matching the expectations, but this is not backed up by any API contract. This fixes the API abuse by introducing and using a new API that does read a token and token length from a CoAP over UDP packet out of a buffer. This now provides the behavior expected by the caller and commits to it via API contract. Co-authored-by: mguetschow <[email protected]> Co-authored-by: benpicco <[email protected]>
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Contribution description
Calling
coap_get_token()andcoap_get_token_length()on an (mostly) uninitializedcoap_pkt_tdid work so far due to implementation details matching the expectations, but this is not backed up by any API contract.This fixes the API abuse by introducing and using a new API that does read a token and token length from a CoAP over UDP packet out of a buffer. This now provides the behavior expected by the caller and commits to it via API contract.
Testing procedure
No change in behavior when using GCoAP.
Issues/PRs references
Not abusing the API by calling an (mostly) unitialized
coap_pkt_tis useful for adding other CoAP formats (e.g. as used for CoAP over TCP and CoAP over WebSocket), ascoap_get_token()will look into a different location depending on the format: For that, adding information needed to deduce the CoAP format to thecoap_pkt_tallows consistent use ofcoap_get_token().