doc: net: sockets: Document mbed TLS limitation for non-blocking case #97338
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mbedtls_ssl_write() function has a limitation, that when the function returns MBEDTLS_ERR_SSL_WANT_WRITE, the consecutive call to this function have to contain the same data as the previous call. As there doesn't seem to be a viable workaround for this at the socket layer (other than dropping non-blocking support which is not an option), we need to carry this requirement for non-blocking sockets as well, therefore document this case in secure sockets documentation. Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
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jukkar approved these changes Oct 10, 2025
| @pdgendt Could you check? |
pdgendt approved these changes Oct 20, 2025
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mbedtls_ssl_write() function has a limitation, that when the function returns MBEDTLS_ERR_SSL_WANT_WRITE, the consecutive call to this function have to contain the same data as the previous call. As there doesn't seem to be a viable workaround for this at the socket layer (other than dropping non-blocking support which is not an option), we need to carry this requirement for non-blocking sockets as well, therefore document this case in secure sockets documentation.