From 3b9b6d0b8e7f798023c9d109c490449d528fde80 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:59:48 +0200 Subject: Adding upstream version 1:9.18.19. Signed-off-by: Daniel Baumann --- lib/isc/netscope.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 lib/isc/netscope.c (limited to 'lib/isc/netscope.c') diff --git a/lib/isc/netscope.c b/lib/isc/netscope.c new file mode 100644 index 0000000..69c3e9a --- /dev/null +++ b/lib/isc/netscope.c @@ -0,0 +1,76 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * 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 https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file */ + +#include +#include + +#include +#include +#include +#include +#include + +isc_result_t +isc_netscope_pton(int af, char *scopename, void *addr, uint32_t *zoneid) { + char *ep; +#ifdef HAVE_IF_NAMETOINDEX + unsigned int ifid; + struct in6_addr *in6; +#endif /* ifdef HAVE_IF_NAMETOINDEX */ + uint32_t zone = 0; + uint64_t llz; + +#ifndef HAVE_IF_NAMETOINDEX + UNUSED(addr); +#endif + + /* 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 HAVE_IF_NAMETOINDEX + in6 = (struct in6_addr *)addr; + if (IN6_IS_ADDR_LINKLOCAL(in6) && + (ifid = if_nametoindex((const char *)scopename)) != 0) + { + zone = (uint32_t)ifid; + } else { +#endif /* ifdef HAVE_IF_NAMETOINDEX */ + llz = strtoull(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 HAVE_IF_NAMETOINDEX + } +#endif /* ifdef HAVE_IF_NAMETOINDEX */ + + *zoneid = zone; + return (ISC_R_SUCCESS); +} -- cgit v1.2.3