/***************************************************************************
                          lib/ibSre.c
                             -------------------

    copyright            : (C) 2001,2002,2003 by Frank Mori Hess
    email                : fmhess@users.sourceforge.net
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "ib_internal.h"
#include <stdlib.h>

int remote_enable(const ibBoard_t *board, int enable)
{
	int retval;

        retval = is_system_controller(board);
	if (retval <= 0) {
		if (retval == 0)
			setIberr(ESAC);
		return -1;
	}

	retval = ioctl(board->fileno, IBSRE, &enable);
	if (retval < 0)	{
		// XXX other error types?
		setIberr(EDVR);
		setIbcnt(errno);
		return retval;
	}

	return 0;
}

int internal_ibsre(ibConf_t *conf, int v)
{
	ibBoard_t *board;
	int retval;

	board = interfaceBoard(conf);

	if (!conf->is_interface) {
		setIberr(EARG);
		return -1;
	}

	retval = remote_enable(board, v);
	if (retval < 0)
		return retval;

	return 0;
}

int ibsre(int ud, int v)
{
	ibConf_t *conf;
	int retval;

	conf = enter_library(ud);
	if (conf == NULL)
		return exit_library(ud, 1);

	retval = internal_ibsre(conf, v);
	if (retval < 0)	{
		fprintf(stderr, "libgpib: ibsre error\n");
		return exit_library(ud, 1);
	}
//XXX supposed to set iberr to old REN setting
	return exit_library(ud, 0);
}

int InternalEnableRemote(ibConf_t *conf, const Addr4882_t addressList[])
{
	int i;
	ibBoard_t *board;
	uint8_t *cmd;
	int count;
	int retval;

	if (addressListIsValid(addressList) == 0)
		return -1;

	if (conf->is_interface == 0) {
		setIberr(EDVR);
		return -1;
	}

	board = interfaceBoard(conf);

	retval = is_cic(board);
	if (retval <= 0) {
		if (retval == 0)
			setIberr(ECIC);
		return -1;
	}

	retval = remote_enable(board, 1);
	if (retval < 0)
		return -1;

	if (numAddresses(addressList) == 0)
		return 0;

	cmd = malloc(16 + 2 * numAddresses(addressList));
	if (!cmd){
		setIberr(EDVR);
		setIbcnt(ENOMEM);
		return -1;
	}

	i = create_send_setup(board, addressList, cmd);

	//XXX detect no listeners (EBUS) error
	count = my_ibcmd(conf, conf->settings.usec_timeout, cmd, i);

	free(cmd);
	cmd = NULL;

	if (count != i)
		return -1;

	return 0;
}


void EnableRemote(int boardID, const Addr4882_t addressList[])
{
	ibConf_t *conf;
	int retval;

	conf = enter_library(boardID);
	if (!conf) {
		exit_library(boardID, 1);
		return;
	}

	retval = InternalEnableRemote(conf, addressList);
	if (retval < 0)	{
		exit_library(boardID, 1);
		return;
	}

	exit_library(boardID, 0);
}


