1 /* 2 * Copyright (c) 1997-2001 by Sun Microsystems, Inc. 3 * All rights reserved. 4 */ 5 6 /* 7 * Copyright (c) 1983, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #pragma ident "%Z%%M% %I% %E% SMI" 40 41 #if defined(LIBC_SCCS) && !defined(lint) 42 static const char sccsid[] = "@(#)inet_makeaddr.c 8.1 (Berkeley) 6/4/93"; 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "port_before.h" 46 47 #include <sys/param.h> 48 #include <netinet/in.h> 49 #include <arpa/inet.h> 50 51 #include "port_after.h" 52 53 /* 54 * Formulate an Internet address from network + host. Used in 55 * building addresses stored in the ifnet structure. 56 */ 57 struct in_addr 58 inet_makeaddr(net, host) 59 #ifdef ORIGINAL_ISC_CODE 60 u_long net, host; 61 #else 62 in_addr_t net, host; 63 #endif 64 { 65 #ifdef ORIGINAL_ISC_CODE 66 u_long addr; 67 #else 68 in_addr_t addr; 69 struct in_addr inaddr; 70 #endif 71 72 if (net < 128) 73 addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST); 74 else if (net < 65536) 75 addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST); 76 else if (net < 16777216L) 77 addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST); 78 else 79 addr = net | host; 80 #ifdef ORIGINAL_ISC_CODE 81 addr = htonl(addr); 82 return (*(struct in_addr *)&addr); 83 #else 84 inaddr.s_addr = htonl(addr); 85 return (inaddr); 86 #endif 87 } 88