1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
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 <inttypes.h>
#include <stdlib.h>
#include <isc/net.h>
#include <isc/netscope.h>
#include <isc/result.h>
#include <isc/string.h>
#include <isc/util.h>
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);
}
|
