ssl handshaking failed

hi, supporters,

I am implementing tls/ssl functionality based on w5100 + stm32f103 hardware platform, the normal tcp communication works well, but the special ssl handshaking can’t work because i can’t receive the whole handshaking package.

the ssl handshaking functionality in linux platform(tcp protocol stack is implemented in linux platform) is okay.
would you please analyze for me?
thanks a lot.

using ioLibrary 3.1.3