3 * Copyright (C) 2000 Henry Spencer.
5 * This library is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU Library General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version. See <http://www.fsf.org/copyleft/lgpl.txt>.
10 * This library is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
13 * License for more details.
15 * RCSID $Id: anyaddr.c,v 1.5 2000/09/19 07:09:32 rgb Exp $
20 /* these are mostly fallbacks for the no-IPv6-support-in-library case */
21 #ifndef IN6ADDR_ANY_INIT
22 #define IN6ADDR_ANY_INIT {{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}
24 #ifndef IN6ADDR_LOOPBACK_INIT
25 #define IN6ADDR_LOOPBACK_INIT {{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}
28 static struct in6_addr v6any = IN6ADDR_ANY_INIT;
29 static struct in6_addr v6loop = IN6ADDR_LOOPBACK_INIT;
32 - anyaddr - initialize to the any-address value
34 err_t /* NULL for success, else string literal */
36 int af; /* address family */
39 uint32_t v4any = htonl(INADDR_ANY);
43 return initaddr((unsigned char *)&v4any, sizeof(v4any), af, dst);
46 return initaddr((unsigned char *)&v6any, sizeof(v6any), af, dst);
49 return "unknown address family in anyaddr/unspecaddr";
55 - unspecaddr - initialize to the unspecified-address value
57 err_t /* NULL for success, else string literal */
59 int af; /* address family */
62 return anyaddr(af, dst);
66 - loopbackaddr - initialize to the loopback-address value
68 err_t /* NULL for success, else string literal */
70 int af; /* address family */
73 uint32_t v4loop = htonl(INADDR_LOOPBACK);
77 return initaddr((unsigned char *)&v4loop, sizeof(v4loop), af, dst);
80 return initaddr((unsigned char *)&v6loop, sizeof(v6loop), af, dst);
83 return "unknown address family in loopbackaddr";
89 - isanyaddr - test for the any-address value
93 const ip_address *src;
95 uint32_t v4any = htonl(INADDR_ANY);
98 switch (src->u.v4.sin_family) {
100 cmp = memcmp(&src->u.v4.sin_addr.s_addr, &v4any, sizeof(v4any));
103 cmp = memcmp(&src->u.v6.sin6_addr, &v6any, sizeof(v6any));
110 return (cmp == 0) ? 1 : 0;
114 - isunspecaddr - test for the unspecified-address value
118 const ip_address *src;
120 return isanyaddr(src);
124 - isloopbackaddr - test for the loopback-address value
128 const ip_address *src;
130 uint32_t v4loop = htonl(INADDR_LOOPBACK);
133 switch (src->u.v4.sin_family) {
135 cmp = memcmp(&src->u.v4.sin_addr.s_addr, &v4loop, sizeof(v4loop));
138 cmp = memcmp(&src->u.v6.sin6_addr, &v6loop, sizeof(v6loop));
145 return (cmp == 0) ? 1 : 0;