1 | #include <machine/rtems-bsd-user-space.h> |
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2 | |
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3 | /* |
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4 | * Copyright (c) 1983, 1993 |
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5 | * The Regents of the University of California. All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * 1. Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * 3. Neither the name of the University nor the names of its contributors |
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16 | * may be used to endorse or promote products derived from this software |
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17 | * without specific prior written permission. |
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18 | * |
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19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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29 | * SUCH DAMAGE. |
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30 | */ |
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31 | |
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32 | #if defined(LIBC_SCCS) && !defined(lint) |
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33 | static const char sccsid[] = "@(#)inet_netof.c 8.1 (Berkeley) 6/4/93"; |
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34 | #endif /* LIBC_SCCS and not lint */ |
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35 | #include <sys/cdefs.h> |
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36 | __FBSDID("$FreeBSD$"); |
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37 | |
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38 | #include "port_before.h" |
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39 | |
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40 | #include <sys/param.h> |
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41 | #include <netinet/in.h> |
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42 | #include <arpa/inet.h> |
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43 | |
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44 | #include "port_after.h" |
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45 | |
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46 | /*% |
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47 | * Return the network number from an internet |
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48 | * address; handles class a/b/c network #'s. |
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49 | */ |
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50 | in_addr_t |
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51 | inet_netof(struct in_addr in) |
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52 | { |
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53 | in_addr_t i = ntohl(in.s_addr); |
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54 | |
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55 | if (IN_CLASSA(i)) |
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56 | return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT); |
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57 | else if (IN_CLASSB(i)) |
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58 | return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT); |
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59 | else |
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60 | return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT); |
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61 | } |
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62 | |
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63 | /* |
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64 | * Weak aliases for applications that use certain private entry points, |
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65 | * and fail to include <arpa/inet.h>. |
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66 | */ |
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67 | #undef inet_netof |
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68 | __weak_reference(__inet_netof, inet_netof); |
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69 | |
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70 | /*! \file */ |
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