1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)inet_makeaddr.c 8.1 (Berkeley) 06/04/93"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/param.h> 13 #include <netinet/in.h> 14 #include <arpa/inet.h> 15 16 /* 17 * Formulate an Internet address from network + host. Used in 18 * building addresses stored in the ifnet structure. 19 */ 20 struct in_addr 21 inet_makeaddr(net, host) 22 u_long net, host; 23 { 24 u_long addr; 25 26 if (net < 128) 27 addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST); 28 else if (net < 65536) 29 addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST); 30 else if (net < 16777216L) 31 addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST); 32 else 33 addr = net | host; 34 addr = htonl(addr); 35 return (*(struct in_addr *)&addr); 36 } 37