124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/* $NetBSD: type_ipv6.c,v 1.10 2004/11/24 11:57:09 blymn Exp $ */
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/*-
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* Copyright (c) 1998-1999 Brett Lymn
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* (blymn@baea.com.au, brett_lymn@yahoo.com.au)
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* All rights reserved.
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*
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* This code has been donated to The NetBSD Foundation by the Author.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Many thanks to Jun-ichiro itojun Hagino <itojun@NetBSD.org> for providing
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* the sample code for the check field function, this function is 99.999%
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* his code.
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*
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: type_ipv6.c,v 1.10 2004/11/24 11:57:09 blymn Exp $");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <ctype.h>
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#include <netdb.h>
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#include <string.h>
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#include "form.h"
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#include "internals.h"
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/*
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* The IP v6 address type handling.
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*/
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/*
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* Check the contents of the field buffer are a valid Ipv6 address only.
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*/
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static int
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ipv6_check_field(FIELD *field, char *args)
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{
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char cleaned[NI_MAXHOST];
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struct addrinfo hints, *res;
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const int niflags = NI_NUMERICHOST;
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if (args == NULL)
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return FALSE;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_INET6;
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hints.ai_socktype = SOCK_DGRAM; /* dummy */
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hints.ai_flags = AI_NUMERICHOST;
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if (getaddrinfo(args, "0", &hints, &res) != 0) {
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/* no it is not an IPv6 address */
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return FALSE;
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}
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if (res->ai_next) {
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/* somehow the address resolved to multiple
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* addresses - strange
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*/
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freeaddrinfo(res);
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return FALSE;
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}
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if (getnameinfo(res->ai_addr, res->ai_addrlen, cleaned,
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(socklen_t) sizeof(cleaned), NULL, 0, niflags) != 0) {
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freeaddrinfo(res);
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return FALSE;
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}
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freeaddrinfo(res);
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/*
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* now we are sure host is an IPv6 address literal, and "cleaned"
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* has the uniformly-formatted IPv6 address literal. Re-set the
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* field buffer to be the reformatted IPv6 address
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*/
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set_field_buffer(field, 0, cleaned);
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return TRUE;
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}
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/*
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* Check the given character is numeric, return TRUE if it is.
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*/
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static int
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ipv6_check_char(/* ARGSUSED1 */ int c, char *args)
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{
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return (isxdigit(c) || (c == '.') || (c == ':')) ? TRUE : FALSE;
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}
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static FIELDTYPE builtin_ipv6 = {
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_TYPE_IS_BUILTIN, /* flags */
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0, /* refcount */
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NULL, /* link */
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NULL, /* make_args */
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NULL, /* copy_args */
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NULL, /* free_args */
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ipv6_check_field, /* field_check */
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ipv6_check_char, /* char_check */
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NULL, /* next_choice */
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NULL /* prev_choice */
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};
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FIELDTYPE *TYPE_IPV6 = &builtin_ipv6;
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