/*
 * Provides Custom BIO layer to interface OpenSSL with TCL. These
 * functions directly interface between the IO channel and BIO buffers.
 *
 * Copyright (C) 1997-2000 Matt Newman <matt@novadigm.com>
 * Copyright (C) 2024 Brian O'Hagan
 *
 */

/*
		tlsBIO.c				tlsIO.c
  +------+                         +-----+                                     +------+
  |      |Tcl_WriteRaw <-- BioWrite| SSL |BIO_write <-- TlsOutputProc <-- Write|      |
  |socket|      <encrypted>        | BIO |            <unencrypted>            | App  | 
  |socket|      <encrypted>        | BIO |            <unencrypted>            | App  |
  |      |Tcl_ReadRaw  -->  BioRead|     |BIO_Read  --> TlsInputProc  -->  Read|      |
  +------+                         +-----+                                     +------+
*/

#include "tlsInt.h"
#include <openssl/bio.h>

 */

BIO *BIO_new_tcl(State *statePtr, int flags) {
    BIO *bio;
#ifdef TCLTLS_SSL_USE_FASTPATH
    Tcl_Channel parentChannel;
    const Tcl_ChannelType *parentChannelType;
    

    int parentChannelFdIn, parentChannelFdOut, parentChannelFd;
    int validParentChannelFd;
#endif

    dprintf("BIO_new_tcl() called");

    /* Create custom BIO method */