1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if defined(LIBC_SCCS) && !defined(lint) 33 static const char sccsid[] = "@(#)inet_makeaddr.c 8.1 (Berkeley) 6/4/93"; 34 #endif /* LIBC_SCCS and not lint */ 35 #include <sys/cdefs.h> 36 #include "port_before.h" 37 38 #include <sys/param.h> 39 #include <netinet/in.h> 40 #include <arpa/inet.h> 41 42 #include "port_after.h" 43 44 /*% 45 * Formulate an Internet address from network + host. Used in 46 * building addresses stored in the ifnet structure. 47 */ 48 struct in_addr 49 inet_makeaddr(in_addr_t net, in_addr_t host) 50 { 51 struct in_addr a; 52 53 if (net < 128U) 54 a.s_addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST); 55 else if (net < 65536U) 56 a.s_addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST); 57 else if (net < 16777216L) 58 a.s_addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST); 59 else 60 a.s_addr = net | host; 61 a.s_addr = htonl(a.s_addr); 62 return (a); 63 } 64 65 /* 66 * Weak aliases for applications that use certain private entry points, 67 * and fail to include <arpa/inet.h>. 68 */ 69 #undef inet_makeaddr 70 __weak_reference(__inet_makeaddr, inet_makeaddr); 71 72 /*! \file */ 73