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/*
 * Copyright (C) 1997-2000 Matt Newman <[email protected]>
 *
 * $Header: /home/rkeene/tmp/cvs2fossil/../tcltls/tls/tls/tlsBIO.c,v 1.8 2004/03/24 05:22:53 razzell Exp $
 *
 * Provides BIO layer to interface openssl to Tcl.
 */

#include "tlsInt.h"

/*
 * Forward declarations
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    BIO *bio;
    CONST char *buf;
    int bufLen;
{
    Tcl_Channel chan = Tls_GetParent((State*)(bio->ptr));
    int ret;

    dprintf(stderr,"\nBioWrite(0x%x, <buf>, %d) [0x%x]",
	    (unsigned int) bio, bufLen, (unsigned int) chan);
    dprintf("BioWrite(%p, <buf>, %d) [%p]",
	    (void *) bio, bufLen, (void *) chan);

    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	ret = Tcl_WriteRaw(chan, buf, bufLen);
    } else {
	ret = Tcl_Write(chan, buf, bufLen);
    }

    dprintf(stderr,"\n[0x%x] BioWrite(%d) -> %d [%d.%d]",
	    (unsigned int) chan, bufLen, ret, Tcl_Eof(chan), Tcl_GetErrno());
    dprintf("[%p] BioWrite(%d) -> %d [%d.%d]",
	    (void *) chan, bufLen, ret, Tcl_Eof(chan), Tcl_GetErrno());

    BIO_clear_flags(bio, BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);

    if (ret == 0) {
	if (!Tcl_Eof(chan)) {
	    BIO_set_retry_write(bio);
	    ret = -1;
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    BIO *bio;
    char *buf;
    int bufLen;
{
    Tcl_Channel chan = Tls_GetParent((State*)bio->ptr);
    int ret = 0;

    dprintf(stderr,"\nBioRead(0x%x, <buf>, %d) [0x%x]",
	    (unsigned int) bio, bufLen, (unsigned int) chan);
    dprintf("BioRead(%p, <buf>, %d) [%p]",
	    (void *) bio, bufLen, (void *) chan);

    if (buf == NULL) return 0;

    if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	ret = Tcl_ReadRaw(chan, buf, bufLen);
    } else {
	ret = Tcl_Read(chan, buf, bufLen);
    }

    dprintf(stderr,"\n[0x%x] BioRead(%d) -> %d [%d.%d]",
	    (unsigned int) chan, bufLen, ret, Tcl_Eof(chan), Tcl_GetErrno());
    dprintf("[%p] BioRead(%d) -> %d [%d.%d]",
	    (void *) chan, bufLen, ret, Tcl_Eof(chan), Tcl_GetErrno());

    BIO_clear_flags(bio, BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);

    if (ret == 0) {
	if (!Tcl_Eof(chan)) {
	    BIO_set_retry_read(bio);
	    ret = -1;
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    long num;
    void *ptr;
{
    Tcl_Channel chan = Tls_GetParent((State*)bio->ptr);
    long ret = 1;
    int *ip;

    dprintf(stderr,"\nBioCtrl(0x%x, 0x%x, 0x%x, 0x%x)",
	    (unsigned int) bio, (unsigned int) cmd, (unsigned int) num,
	    (unsigned int) ptr);
    dprintf("BioCtrl(%p, 0x%x, 0x%x, %p)",
	    (void *) bio, (unsigned int) cmd, (unsigned int) num,
	    (void *) ptr);

    switch (cmd) {
    case BIO_CTRL_RESET:
	num = 0;
    case BIO_C_FILE_SEEK:
    case BIO_C_FILE_TELL:
	ret = 0;
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    case BIO_CTRL_GET_CLOSE:
	ret = bio->shutdown;
	break;
    case BIO_CTRL_SET_CLOSE:
	bio->shutdown = (int)num;
	break;
    case BIO_CTRL_EOF:
	dprintf(stderr, "BIO_CTRL_EOF\n");
	dprintf("BIO_CTRL_EOF");
	ret = Tcl_Eof(chan);
	break;
    case BIO_CTRL_PENDING:
	ret = (Tcl_InputBuffered(chan) ? 1 : 0);
	dprintf(stderr, "BIO_CTRL_PENDING(%d)\n", (int) ret);
	dprintf("BIO_CTRL_PENDING(%d)", (int) ret);
	break;
    case BIO_CTRL_WPENDING:
	ret = 0;
	break;
    case BIO_CTRL_DUP:
	break;
    case BIO_CTRL_FLUSH:
	dprintf(stderr, "BIO_CTRL_FLUSH\n");
	dprintf("BIO_CTRL_FLUSH");
	if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
	    ret = ((Tcl_WriteRaw(chan, "", 0) >= 0) ? 1 : -1);
	} else {
	    ret = ((Tcl_Flush(chan) == TCL_OK) ? 1 : -1);
	}
	break;
    default: