77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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* Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 2002 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/*! \file */
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#if defined(LIBC_SCCS) && !defined(lint)
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static char rcsid[] =
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"$Id: netscope.c,v 1.13 2007/06/19 23:47:17 tbox Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <config.h>
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#include <isc/string.h>
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#include <isc/net.h>
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#include <isc/netscope.h>
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#include <isc/result.h>
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isc_result_t
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isc_netscope_pton(int af, char *scopename, void *addr, isc_uint32_t *zoneid) {
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char *ep;
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#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
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unsigned int ifid;
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#endif
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struct in6_addr *in6;
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isc_uint32_t zone;
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isc_uint64_t llz;
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/* at this moment, we only support AF_INET6 */
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if (af != AF_INET6)
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return (ISC_R_FAILURE);
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in6 = (struct in6_addr *)addr;
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/*
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* Basically, "names" are more stable than numeric IDs in terms of
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* renumbering, and are more preferred. However, since there is no
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* standard naming convention and APIs to deal with the names. Thus,
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* we only handle the case of link-local addresses, for which we use
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* interface names as link names, assuming one to one mapping between
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* interfaces and links.
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*/
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#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
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if (IN6_IS_ADDR_LINKLOCAL(in6) &&
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(ifid = if_nametoindex((const char *)scopename)) != 0)
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zone = (isc_uint32_t)ifid;
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else {
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#endif
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llz = isc_string_touint64(scopename, &ep, 10);
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if (ep == scopename)
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return (ISC_R_FAILURE);
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/* check overflow */
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zone = (isc_uint32_t)(llz & 0xffffffffUL);
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if (zone != llz)
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return (ISC_R_FAILURE);
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#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
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}
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#endif
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*zoneid = zone;
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return (ISC_R_SUCCESS);
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}
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