dtls1_read_bytes
int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek);
.ssl_read_bytes = dtls1_read_bytes,
.ssl_read_bytes = dtls1_read_bytes,
.ssl_read_bytes = dtls1_read_bytes,
.ssl_read_bytes = dtls1_read_bytes,
.ssl_read_bytes = dtls1_read_bytes,
.ssl_read_bytes = dtls1_read_bytes,