d8213d00db
For the situation where the mbedTLS device has limited RAM, but the other end of the connection doesn't support the max_fragment_length extension. To be spec-compliant, mbedTLS has to keep a 16384 byte incoming buffer. However the outgoing buffer can be made smaller without breaking spec compliance, and we save some RAM. See comments in include/mbedtls/config.h for some more details. (The lower limit of outgoing buffer size is the buffer size used during handshake/cert negotiation. As the handshake is half-duplex it might even be possible to store this data in the "incoming" buffer during the handshake, which would save even more RAM - but it would also be a lot hackier and error-prone. I didn't really explore this possibility, but thought I'd mention it here in case someone sees this later on a mission to jam mbedTLS into an even tinier RAM footprint.) |
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| .gitignore | ||
| CMakeLists.txt | ||