def makefile(self, mode='rb', bufsize='ignored'):
r = 'r' in mode or '+' in mode
w = 'w' in mode or 'a' in mode or '+' in mode
b = 'b' in mode
m2mode = ['', 'r'][r] + ['', 'w'][w] + ['', 'b'][b]
# XXX Need to dup().
bio = BIO.BIO(self.sslbio, _close_cb=self.close)
m2.bio_do_handshake(bio._ptr())
return BIO.IOBuffer(bio, m2mode, _pyfree=0)
