1/*	$NetBSD: type_ipv6.c,v 1.9 2004/11/16 06:04:13 itojun Exp $	*/
2
3/*-
4 * Copyright (c) 1998-1999 Brett Lymn
5 *                         (blymn@baea.com.au, brett_lymn@yahoo.com.au)
6 * All rights reserved.
7 *
8 * This code has been donated to The NetBSD Foundation by the Author.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Many thanks to Jun-ichiro itojun Hagino <itojun@NetBSD.org> for providing
30 * the sample code for the check field function, this function is 99.999%
31 * his code.
32 *
33 */
34
35#include <sys/cdefs.h>
36__RCSID("$NetBSD: type_ipv6.c,v 1.9 2004/11/16 06:04:13 itojun Exp $");
37
38#include <sys/types.h>
39#include <sys/socket.h>
40#include <ctype.h>
41#include <netdb.h>
42#include <string.h>
43#include "form.h"
44#include "internals.h"
45
46/*
47 * The IP v6 address type handling.
48 */
49
50/*
51 * Check the contents of the field buffer are a valid Ipv6 address only.
52 */
53static int
54ipv6_check_field(FIELD *field, char *args)
55{
56	char cleaned[NI_MAXHOST];
57	struct addrinfo hints, *res;
58	const int niflags = NI_NUMERICHOST;
59
60	if (args == NULL)
61		return FALSE;
62
63	memset(&hints, 0, sizeof(hints));
64	hints.ai_family = AF_INET6;
65	hints.ai_socktype = SOCK_DGRAM;	/* dummy */
66	hints.ai_flags = AI_NUMERICHOST;
67
68	if (getaddrinfo(args, "0", &hints, &res) != 0) {
69		  /* no it is not an IPv6 address */
70		return FALSE;
71	}
72
73	if (res->ai_next) {
74		  /* somehow the address resolved to multiple
75		   *  addresses - strange
76		   */
77		freeaddrinfo(res);
78		return FALSE;
79	}
80
81	if (getnameinfo(res->ai_addr, res->ai_addrlen, cleaned,
82			(socklen_t) sizeof(cleaned), NULL, 0, niflags) != 0) {
83		freeaddrinfo(res);
84		return FALSE;
85	}
86
87	freeaddrinfo(res);
88
89	  /*
90	   * now we are sure host is an IPv6 address literal, and "cleaned"
91	   * has the uniformly-formatted IPv6 address literal.  Re-set the
92	   * field buffer to be the reformatted IPv6 address
93	   */
94	set_field_buffer(field, 0, cleaned);
95
96	return TRUE;
97}
98
99/*
100 * Check the given character is numeric, return TRUE if it is.
101 */
102static int
103ipv6_check_char(/* ARGSUSED1 */ int c, char *args)
104{
105	return (isxdigit(c) || (c == '.') || (c == ':')) ? TRUE : FALSE;
106}
107
108static FIELDTYPE builtin_ipv6 = {
109	_TYPE_IS_BUILTIN,                   /* flags */
110	0,                                  /* refcount */
111	NULL,                               /* link */
112	NULL,                               /* make_args */
113	NULL,                               /* copy_args */
114	NULL,                               /* free_args */
115	ipv6_check_field,                   /* field_check */
116	ipv6_check_char,                    /* char_check */
117	NULL,                               /* next_choice */
118	NULL                                /* prev_choice */
119};
120
121FIELDTYPE *TYPE_IPV6 = &builtin_ipv6;
122
123
124