PageRenderTime 14ms CodeModel.GetById 1ms app.highlight 7ms RepoModel.GetById 1ms app.codeStats 0ms

/contrib/bind9/lib/isc/netscope.c

https://bitbucket.org/freebsd/freebsd-head/
C | 76 lines | 39 code | 10 blank | 27 comment | 10 complexity | aa512cdd2b5bf697e4d640200a4eabbe MD5 | raw file
 1/*
 2 * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
 3 * Copyright (C) 2002  Internet Software Consortium.
 4 *
 5 * Permission to use, copy, modify, and/or distribute this software for any
 6 * purpose with or without fee is hereby granted, provided that the above
 7 * copyright notice and this permission notice appear in all copies.
 8 *
 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/*! \file */
19
20#if defined(LIBC_SCCS) && !defined(lint)
21static char rcsid[] =
22	"$Id: netscope.c,v 1.13 2007/06/19 23:47:17 tbox Exp $";
23#endif /* LIBC_SCCS and not lint */
24
25#include <config.h>
26
27#include <isc/string.h>
28#include <isc/net.h>
29#include <isc/netscope.h>
30#include <isc/result.h>
31
32isc_result_t
33isc_netscope_pton(int af, char *scopename, void *addr, isc_uint32_t *zoneid) {
34	char *ep;
35#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
36	unsigned int ifid;
37#endif
38	struct in6_addr *in6;
39	isc_uint32_t zone;
40	isc_uint64_t llz;
41
42	/* at this moment, we only support AF_INET6 */
43	if (af != AF_INET6)
44		return (ISC_R_FAILURE);
45
46	in6 = (struct in6_addr *)addr;
47
48	/*
49	 * Basically, "names" are more stable than numeric IDs in terms of
50	 * renumbering, and are more preferred.  However, since there is no
51	 * standard naming convention and APIs to deal with the names.  Thus,
52	 * we only handle the case of link-local addresses, for which we use
53	 * interface names as link names, assuming one to one mapping between
54	 * interfaces and links.
55	 */
56#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
57	if (IN6_IS_ADDR_LINKLOCAL(in6) &&
58	    (ifid = if_nametoindex((const char *)scopename)) != 0)
59		zone = (isc_uint32_t)ifid;
60	else {
61#endif
62		llz = isc_string_touint64(scopename, &ep, 10);
63		if (ep == scopename)
64			return (ISC_R_FAILURE);
65
66		/* check overflow */
67		zone = (isc_uint32_t)(llz & 0xffffffffUL);
68		if (zone != llz)
69			return (ISC_R_FAILURE);
70#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
71	}
72#endif
73
74	*zoneid = zone;
75	return (ISC_R_SUCCESS);
76}