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2aa62f2b | 1 | /** @File\r |
2 | Return the local network address portion of an internet address.\r | |
3 | \r | |
4 | Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials are licensed and made available under\r | |
6 | the terms and conditions of the BSD License that accompanies this distribution.\r | |
7 | The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | * Copyright (c) 1983, 1993\r | |
14 | * The Regents of the University of California. All rights reserved.\r | |
15 | *\r | |
16 | * Redistribution and use in source and binary forms, with or without\r | |
17 | * modification, are permitted provided that the following conditions\r | |
18 | * are met:\r | |
19 | * 1. Redistributions of source code must retain the above copyright\r | |
20 | * notice, this list of conditions and the following disclaimer.\r | |
21 | * 2. Redistributions in binary form must reproduce the above copyright\r | |
22 | * notice, this list of conditions and the following disclaimer in the\r | |
23 | * documentation and/or other materials provided with the distribution.\r | |
24 | * 3. Neither the name of the University nor the names of its contributors\r | |
25 | * may be used to endorse or promote products derived from this software\r | |
26 | * without specific prior written permission.\r | |
27 | *\r | |
28 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r | |
29 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
30 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
31 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r | |
32 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r | |
33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r | |
34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r | |
36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r | |
37 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r | |
38 | * SUCH DAMAGE.\r | |
39 | \r | |
40 | NetBSD: inet_lnaof.c,v 1.1 2004/05/20 23:13:02 christos Exp\r | |
41 | inet_lnaof.c 8.1 (Berkeley) 6/4/93\r | |
42 | **/\r | |
43 | #include <LibConfig.h>\r | |
44 | \r | |
45 | #include "namespace.h"\r | |
46 | #include <sys/param.h>\r | |
47 | #include <netinet/in.h>\r | |
48 | #include <arpa/inet.h>\r | |
49 | \r | |
50 | #ifdef __weak_alias\r | |
51 | __weak_alias(inet_lnaof,_inet_lnaof)\r | |
52 | #endif\r | |
53 | \r | |
54 | /*\r | |
55 | * Return the local network address portion of an\r | |
56 | * internet address; handles class a/b/c network\r | |
57 | * number formats.\r | |
58 | */\r | |
59 | in_addr_t\r | |
60 | inet_lnaof(struct in_addr in)\r | |
61 | {\r | |
62 | in_addr_t i = ntohl(in.s_addr);\r | |
63 | \r | |
64 | if (IN_CLASSA(i))\r | |
65 | return ((i)&IN_CLASSA_HOST);\r | |
66 | else if (IN_CLASSB(i))\r | |
67 | return ((i)&IN_CLASSB_HOST);\r | |
68 | else\r | |
69 | return ((i)&IN_CLASSC_HOST);\r | |
70 | }\r |