git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 28f540f4 RM |
1 | /* |
| 2 | * Copyright (c) 1983, 1993 | |
| 3 | * The Regents of the University of California. All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 28f540f4 RM |
13 | * 4. Neither the name of the University nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software | |
| 15 | * without specific prior written permission. | |
| 16 | * | |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 27 | * SUCH DAMAGE. | |
| 28 | */ | |
| 29 | ||
| 28f540f4 RM |
30 | #include <sys/param.h> |
| 31 | #include <netinet/in.h> | |
| 32 | #include <arpa/inet.h> | |
| 33 | ||
| 34 | /* | |
| 35 | * Return the local network address portion of an | |
| 36 | * internet address; handles class a/b/c network | |
| 37 | * number formats. | |
| 38 | */ | |
| bf2cc5fb | 39 | in_addr_t |
| 9d46370c | 40 | inet_lnaof (struct in_addr in) |
| 28f540f4 | 41 | { |
| d9fee042 | 42 | uint32_t i = ntohl(in.s_addr); |
| 28f540f4 RM |
43 | |
| 44 | if (IN_CLASSA(i)) | |
| 45 | return ((i)&IN_CLASSA_HOST); | |
| 46 | else if (IN_CLASSB(i)) | |
| 47 | return ((i)&IN_CLASSB_HOST); | |
| 48 | else | |
| 49 | return ((i)&IN_CLASSC_HOST); | |
| 50 | } |