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. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static const char sccsid[] = "@(#)inet_makeaddr.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include "port_before.h" 41 42 #include <sys/param.h> 43 #include <netinet/in.h> 44 #include <arpa/inet.h> 45 46 #include "port_after.h" 47 48 /* 49 * Formulate an Internet address from network + host. Used in 50 * building addresses stored in the ifnet structure. 51 */ 52 struct in_addr 53 inet_makeaddr(net, host) 54 in_addr_t net, host; 55 { 56 struct in_addr a; 57 58 if (net < 128U) 59 a.s_addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST); 60 else if (net < 65536U) 61 a.s_addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST); 62 else if (net < 16777216L) 63 a.s_addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST); 64 else 65 a.s_addr = net | host; 66 a.s_addr = htonl(a.s_addr); 67 return (a); 68 } 69 70 /* 71 * Weak aliases for applications that use certain private entry points, 72 * and fail to include <arpa/inet.h>. 73 */ 74 #undef inet_makeaddr 75 __weak_reference(__inet_makeaddr, inet_makeaddr); 76