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8f048ffddc
Basically, in the portability layer, it is checked if the socket is NON-block, and if not, then even the EAGAIN and EWOULDBLOCK errors are diverted to a RECV error. This causes a problem for sockets with receive timeouts set. When such a timeout is set, the condition for NON_BLOCK isn't met and hence a hard error is returned. Searching for EAGAIN and EWOULDBLOCK in lwip returns only 3 results (accept, recvfrom, close) and all of them look to be genuine cases for EWOULDBLOCK. So removing this check to make receive timeout with TLS work.