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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <config.h>
#include <isc/string.h>
#include <isc/net.h>
#include <isc/netscope.h>
#include <isc/result.h>
isc_result_t
isc_netscope_pton(int af, char *scopename, void *addr, uint32_t *zoneid) {
char *ep;
#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
unsigned int ifid;
struct in6_addr *in6;
#endif
uint32_t zone;
uint64_t llz;
/* at this moment, we only support AF_INET6 */
if (af != AF_INET6)
return (ISC_R_FAILURE);
/*
* Basically, "names" are more stable than numeric IDs in terms of
* renumbering, and are more preferred. However, since there is no
* standard naming convention and APIs to deal with the names. Thus,
* we only handle the case of link-local addresses, for which we use
* interface names as link names, assuming one to one mapping between
* interfaces and links.
*/
#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
in6 = (struct in6_addr *)addr;
if (IN6_IS_ADDR_LINKLOCAL(in6) &&
(ifid = if_nametoindex((const char *)scopename)) != 0)
zone = (uint32_t)ifid;
else {
#endif
llz = isc_string_touint64(scopename, &ep, 10);
if (ep == scopename)
return (ISC_R_FAILURE);
/* check overflow */
zone = (uint32_t)(llz & 0xffffffffUL);
if (zone != llz)
return (ISC_R_FAILURE);
#ifdef ISC_PLATFORM_HAVEIFNAMETOINDEX
}
#endif
*zoneid = zone;
return (ISC_R_SUCCESS);
}
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