Tweak return value handling in the TLSv1.3 handshake code.

The I/O paths are from the tls13_handshake_send_action() and
tls13_handshake_recv_action() functions - both of these need to propagate
I/O conditions (EOF, failure, want poll in, want poll out) up the stack,
so we need to capture and return values <= 0. Use an I/O condition to
indicate successful handshake completion.

Also, the various send/recv functions are currently unimplemented, so
return 0 (failure) rather than 1 (success).

ok tb@

0 files changed, 0 insertions, 0 deletions