In the past I enabled ALTCP layer to add TLS and I used
altcp_tls_mbedtls examples present in lwip repo.
I thought it was the way to add TLS to lwip.
Recently I looked at some example projects of NXP, such as this[1].
This is an example of a TLS httpd server. TLS is added by mbedtls, but
ALTCP lwip support is NOT enabled (and altcp_tls_mbedtls is NOT enabled
too).
It seems NXP uses a different (patched?) httpd implementation with
integrated mbedtls support. I couldn't understand if this is a smarter
way to add TLS support to lwip (that avoid ALTCP at all) or an old way
that should be avoided nowadays that is available ALTCP and
altcp_tls_mbedtls.
[1]
https://github.com/nxp-mcuxpresso/mcux-sdk-examples/tree/main/lpcxpresso54628/lwip_examples/lwip_httpssrv_mbedTLS/bm
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