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/* $Id: ace.h,v 1.2 2001/10/31 08:51:28 m-kasahr Exp $ */
/*
* Copyright (c) 2001 Japan Network Information Center. All rights reserved.
*
* By using this file, you agree to the terms and conditions set forth bellow.
*
* LICENSE TERMS AND CONDITIONS
*
* The following License Terms and Conditions apply, unless a different
* license is obtained from Japan Network Information Center ("JPNIC"),
* a Japanese association, Kokusai-Kougyou-Kanda Bldg 6F, 2-3-4 Uchi-Kanda,
* Chiyoda-ku, Tokyo 101-0047, Japan.
*
* 1. Use, Modification and Redistribution (including distribution of any
* modified or derived work) in source and/or binary forms is permitted
* under this License Terms and Conditions.
*
* 2. Redistribution of source code must retain the copyright notices as they
* appear in each source code file, this License Terms and Conditions.
*
* 3. Redistribution in binary form must reproduce the Copyright Notice,
* this License Terms and Conditions, in the documentation and/or other
* materials provided with the distribution. For the purposes of binary
* distribution the "Copyright Notice" refers to the following language:
* "Copyright (c) Japan Network Information Center. All rights reserved."
*
* 4. Neither the name of JPNIC may be used to endorse or promote products
* derived from this Software without specific prior written approval of
* JPNIC.
*
* 5. Disclaimer/Limitation of Liability: THIS SOFTWARE IS PROVIDED BY JPNIC
* "AS IS" AND ANY EXPRESS 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 JPNIC 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 DAMAGES.
*
* 6. Indemnification by Licensee
* Any person or entities using and/or redistributing this Software under
* this License Terms and Conditions shall defend indemnify and hold
* harmless JPNIC from and against any and all judgements damages,
* expenses, settlement liabilities, cost and other liabilities of any
* kind as a result of use and redistribution of this Software or any
* claim, suite, action, litigation or proceeding by any third party
* arising out of or relates to this License Terms and Conditions.
*
* 7. Governing Law, Jurisdiction and Venue
* This License Terms and Conditions shall be governed by and and
* construed in accordance with the law of Japan. Any person or entities
* using and/or redistributing this Software under this License Terms and
* Conditions hereby agrees and consent to the personal and exclusive
* jurisdiction and venue of Tokyo District Court of Japan.
*/
#ifndef MDN_ACE_H
#define MDN_ACE_H 1
/*
* ACE converter utility module.
*/
#include <mdn/result.h>
/*
* ACE identifier type -- prefix or suffix.
*/
enum {
mdn__ace_prefix,
mdn__ace_suffix
};
/*
* ACE encoding/decode procedure.
*
* This prototype applies to both encode and decode procedure. Both
* of which converts a domain label (i.e. contains no dots) pointed by
* 'from', whose length is 'fromlen', and stores the result to 'to',
* whose size is 'tolen'.
* the ACE string must not have ACE prefix/suffix, as it is automatically
* handled by 'mdn__ace_convert'.
*/
typedef mdn_result_t (*mdn__ace_proc_t)(const char *from, size_t fromlen,
char *to, size_t tolen);
/*
* ACE converter property.
*
* 'id_type' shows the type of ACE identifier, which is either
* 'mdn__ace_prefix' or 'mdn__ace_suffix'. 'id_str' is the ACE
* identifier itself. 'encoder' and 'decode' are pointers to the
* encode and decode procedures.
* Encode procedure converts a domain name label in UTF-8 to
* ACE-encoded one, and decode procedure converts ACE-encoded label to
* UTF-8 encoded one.
*/
typedef struct {
int id_type; /* mdn__ace_prefix/mdn__ace_suffix */
const char *id_str; /* prefix/suffix string */
mdn__ace_proc_t encoder; /* encode procedure */
mdn__ace_proc_t decoder; /* decode procedure */
} mdn__ace_t;
/*
* Utility for ACE converter.
*
* Convert a domain name given by 'from' and stores the result to
* 'to', whose length is 'tolen'. If 'dir' is 'mdn_convert_u2l',
* 'from' points UTF-8 string which is converted to ACE encoding. If
* 'dir' is 'mdn_convert_l2u', 'from' points ACE string which is
* converted to UTF-8.
* This function first breaks down the given name into labels,
* and encode/decode each label. When encoding, conversion of
* STD13 conforming labels (i.e. valid ASCII labels) is skipped.
* When decoding, if the decoding failed but the label is a legitimate
* ASCII label, those labels are copied verbatim. To reject illegally
* encoded labels, the decoding process performs two kinds of checks:
* 1. check that the decoded string does NOT comform to STD13.
* 2. try encoding the decoded string, and see if the result matches
* to the original string.
*/
extern mdn_result_t
mdn__ace_convert(mdn__ace_t *ctx, mdn_converter_dir_t dir,
const char *from, char *to, size_t tolen);
#endif /* MDN_ACE_H */
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