/* ==================================================================== 
 * The Kannel Software License, Version 1.0 
 * 
 * Copyright (c) 2001-2010 Kannel Group  
 * Copyright (c) 1998-2001 WapIT Ltd.   
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 * 
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in 
 *    the documentation and/or other materials provided with the 
 *    distribution. 
 * 
 * 3. The end-user documentation included with the redistribution, 
 *    if any, must include the following acknowledgment: 
 *       "This product includes software developed by the 
 *        Kannel Group (http://www.kannel.org/)." 
 *    Alternately, this acknowledgment may appear in the software itself, 
 *    if and wherever such third-party acknowledgments normally appear. 
 * 
 * 4. The names "Kannel" and "Kannel Group" must not be used to 
 *    endorse or promote products derived from this software without 
 *    prior written permission. For written permission, please  
 *    contact org@kannel.org. 
 * 
 * 5. Products derived from this software may not be called "Kannel", 
 *    nor may "Kannel" appear in their name, without prior written 
 *    permission of the Kannel Group. 
 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED.  IN NO EVENT SHALL THE KANNEL GROUP OR ITS CONTRIBUTORS 
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,  
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT  
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR  
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,  
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE  
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,  
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 * ==================================================================== 
 * 
 * This software consists of voluntary contributions made by many 
 * individuals on behalf of the Kannel Group.  For more information on  
 * the Kannel Group, please see <http://www.kannel.org/>. 
 * 
 * Portions of this software are based upon software originally written at  
 * WapIT Ltd., Helsinki, Finland for the Kannel project.  
 */ 

/*
 * wsp.c - Parts of WSP shared between session oriented and connectionless mode
 */


#include <string.h>

#include "gwlib/gwlib.h"
#include "wsp.h"
#include "wsp_pdu.h"
#include "wsp_headers.h"
#include "wsp_strings.h"

/***********************************************************************
 * Public functions
 */


/* Convert HTTP status codes to WSP status codes according
 * to WSP Table 36, Status Code Assignments. */
long wsp_convert_http_status_to_wsp_status(long http_status) {
	long hundreds, singles;

	/*
	 * The table is regular, and can be expected to stay regular in
	 * future versions of WSP.  The status value is read as XYY,
	 * so that X is the first digit and Y is the value of the
	 * second two digits.  This is encoded as a hex value 0xAB,
	 * where A == X and B == YY.
	 * This limits YY to the range 0-15, so an exception is made
	 * to allow larger YY values when X is 4.  X value 5 is moved up
	 * to A value 6 to allow more room for YY when X is 4.
	 */

	hundreds = http_status / 100;
	singles = http_status % 100;

	if ((hundreds == 4 && singles > 31) ||
	    (hundreds != 4 && singles > 15) ||
	    hundreds < 1 || hundreds > 5)
		goto bad_status;

	if (hundreds > 4)
		hundreds++;

	return hundreds * 16 + singles;

bad_status:
	error(0, "WSP: Unknown status code used internally. Oops.");
	return 0x60; /* Status 500, or "Internal Server Error" */
}
