*/

#include "tlsInt.h"

/*
 * Forward declarations
 */
static int  TlsBlockModeProc (void *instanceData, int mode);
static int  TlsCloseProc (void *instanceData, Tcl_Interp *interp);
static int  TlsClose2Proc (void *instanceData, Tcl_Interp *interp, int flags);
static int  TlsInputProc (void *instanceData, char *buf, int bufSize, int *errorCodePtr);
static int  TlsOutputProc (void *instanceData, const char *buf, int toWrite, int *errorCodePtr);
static int  TlsGetOptionProc (void *instanceData, Tcl_Interp *interp, const char *optionName, Tcl_DString *dsPtr);
static void TlsWatchProc (void *instanceData, int mask);
static int  TlsGetHandleProc (void *instanceData, int direction, void **handlePtr);
static int  TlsNotifyProc (void *instanceData, int mask);
static void TlsChannelHandlerTimer (void *clientData);

/*
 * TLS Channel Type
 */
static const Tcl_ChannelType tlsChannelType = {
  "tls",                             /* typeName                             */
  TCL_CHANNEL_VERSION_5,             /* version                              */
  TlsCloseProc,                      /* closeProc                            */
  TlsInputProc,                      /* inputProc                            */
  TlsOutputProc,                     /* outputProc                           */
  0,                                 /* seekProc                             */
  0,                                 /* setOptionProc                        */
  TlsGetOptionProc,                  /* getOptionProc                        */
  TlsWatchProc,                      /* watchProc                            */
  TlsGetHandleProc,                  /* getHandleProc                        */
  TlsClose2Proc,                     /* close2Proc                           */
  TlsBlockModeProc,                  /* blockModeProc                        */
  0,                                 /* flushProc                            */
  TlsNotifyProc,                     /* handlerProc                          */
  0,                                 /* wideSeekProc                         */
  0,                                 /* threadActionProc                     */
  0                                  /* truncateProc                         */
};


/*
 *-------------------------------------------------------------------
 *
 * Tls_ChannelType --

 *	0 if successful, errno when failed.
 *
 * Side effects:
 *	Sets the device into blocking or nonblocking mode.
 *
 *-------------------------------------------------------------------
 */
static int TlsBlockModeProc(void *instanceData, int mode) {
	State *statePtr = (State *) instanceData;

	if (mode == TCL_MODE_NONBLOCKING) {
		statePtr->flags |= TLS_TCL_ASYNC;
	} else {
		statePtr->flags &= ~(TLS_TCL_ASYNC);
	}

 *	0 if successful, the value of Tcl_GetErrno() if failed.
 *
 * Side effects:
 *	Closes the socket of the channel.
 *
 *-------------------------------------------------------------------
 */
static int TlsCloseProc(void *instanceData, TCL_UNUSED(Tcl_Interp *)) {
	State *statePtr = (State *) instanceData;

	dprintf("TlsCloseProc(%p)", statePtr);

	Tls_Clean(statePtr);
	Tcl_EventuallyFree(statePtr, Tls_Free);

	dprintf("Returning TCL_OK");

	return(TCL_OK);
}

static int TlsClose2Proc(void *instanceData, Tcl_Interp *interp, int flags) {
	if (!(flags&(TCL_CLOSE_READ|TCL_CLOSE_WRITE))) {
	    return TlsCloseProc(instanceData, interp);
	}
	return EINVAL;
}

/*
 *------------------------------------------------------*
 *
 *	Tls_WaitForConnect --
 *
 *	Sideeffects:

 *
 * Side effects:
 *	Reads input from the input device of the channel.
 *
 *-------------------------------------------------------------------
 */

static int TlsInputProc(void *instanceData, char *buf, int bufSize, int *errorCodePtr) {
	unsigned long backingError;
	State *statePtr = (State *) instanceData;
	int bytesRead;
	int tlsConnect;
	int err;

	*errorCodePtr = 0;

 *
 * Side effects:
 *	Writes output on the output device of the channel.
 *
 *-------------------------------------------------------------------
 */

static int TlsOutputProc(void *instanceData, const char *buf, int toWrite, int *errorCodePtr) {
	unsigned long backingError;
	State *statePtr = (State *) instanceData;
	int written, err;
	int tlsConnect;

	*errorCodePtr = 0;

 *
 * Side effects:
 *	None.
 *
 *-------------------------------------------------------------------
 */
static int
TlsGetOptionProc(void *instanceData,	/* Socket state. */
	Tcl_Interp *interp,		/* For errors - can be NULL. */
	const char *optionName,		/* Name of the option to
					 * retrieve the value for, or
					 * NULL to get all options and
					 * their values. */
	Tcl_DString *dsPtr)		/* Where to store the computed value
					 * initialized by caller. */

 *	Sets up the notifier so that a future event on the channel
 *	will be seen by Tcl.
 *
 *-------------------------------------------------------------------
 */

static void
TlsWatchProc(void *instanceData,	/* The socket state. */
             int mask)			/* Events of interest; an OR-ed
                                         * combination of TCL_READABLE,
                                         * TCL_WRITABLE and TCL_EXCEPTION. */
{
    Tcl_Channel     downChan;
    State *statePtr = (State *) instanceData;

	if (mask & TCL_READABLE) {
		if (Tcl_InputBuffered(statePtr->self) > 0 || BIO_ctrl_pending(statePtr->bio) > 0) {
			/*
			 * There is interest in readable events and we actually have
			 * data waiting, so generate a timer to flush that.
			 */
			dprintf("Creating a new timer since data appears to be waiting");
			statePtr->timer = Tcl_CreateTimerHandler(TLS_TCL_DELAY, TlsChannelHandlerTimer, statePtr);
		}
	}
}

/*
 *-------------------------------------------------------------------
 *
 * TlsGetHandleProc --
 *
 *	Called from Tcl_GetChannelFile to retrieve o/s file handler
 *	from the SSL socket based channel.
 *
 * Results:
 *	The appropriate Tcl_File or NULL if not present.
 *
 * Side effects:
 *	None.
 *
 *-------------------------------------------------------------------
 */
static int TlsGetHandleProc(void *instanceData, int direction, void **handlePtr) {
	State *statePtr = (State *) instanceData;

	return(Tcl_GetChannelHandle(Tls_GetParent(statePtr, TLS_TCL_FASTPATH), direction, handlePtr));
}

/*
 *-------------------------------------------------------------------

 *
 * Side effects:
 *	May process the incoming event by itself.
 *
 *-------------------------------------------------------------------
 */

static int TlsNotifyProc(void *instanceData, int mask) {
	State *statePtr = (State *) instanceData;
	int errorCode;

	/*
	 * An event occured in the underlying channel.  This
	 * transformation doesn't process such events thus returns the
	 * incoming mask unchanged.

 *              None.
 *
 *------------------------------------------------------*
 */

static void
TlsChannelHandler (clientData, mask)
    void *    clientData;
    int            mask;
{
    State *statePtr = (State *) clientData;

    dprintf("HANDLER(0x%x)", mask);
    Tcl_Preserve(statePtr);

    if (mask & TCL_READABLE) {
	BIO_set_flags(statePtr->p_bio, BIO_FLAGS_READ);
    } else {
	BIO_clear_flags(statePtr->p_bio, BIO_FLAGS_READ);
    }

	statePtr->timer = (Tcl_TimerToken)NULL;
    }
    if ((mask & TCL_READABLE) && Tcl_InputBuffered(statePtr->self) > 0) {
	/*
	 * Data is waiting, flush it out in short time
	 */
	statePtr->timer = Tcl_CreateTimerHandler(TLS_TCL_DELAY,
		TlsChannelHandlerTimer, statePtr);
    }
    Tcl_Release(statePtr);
}
#endif

/*
 *------------------------------------------------------*
 *
 *	TlsChannelHandlerTimer --

 *
 *	Result:
 *		None.
 *
 *------------------------------------------------------*
 */

static void TlsChannelHandlerTimer(void *clientData) {
	State *statePtr = (State *) clientData;
	int mask = 0;

	dprintf("Called");

	statePtr->timer = (Tcl_TimerToken) NULL;