121368Sdist /* 221368Sdist * Copyright (c) 1983 Regents of the University of California. 321368Sdist * All rights reserved. The Berkeley software License Agreement 421368Sdist * specifies the terms and conditions for redistribution. 521368Sdist */ 68358Ssam 726613Sdonn #if defined(LIBC_SCCS) && !defined(lint) 8*32317Sbostic static char sccsid[] = "@(#)inet_lnaof.c 5.3 (Berkeley) 10/01/87"; 926613Sdonn #endif LIBC_SCCS and not lint 1021368Sdist 118358Ssam #include <sys/types.h> 129192Ssam #include <netinet/in.h> 138358Ssam 148358Ssam /* 158358Ssam * Return the local network address portion of an 168358Ssam * internet address; handles class a/b/c network 178358Ssam * number formats. 188358Ssam */ 19*32317Sbostic u_long 208370Ssam inet_lnaof(in) 218358Ssam struct in_addr in; 228358Ssam { 239192Ssam register u_long i = ntohl(in.s_addr); 249192Ssam 259192Ssam if (IN_CLASSA(i)) 269192Ssam return ((i)&IN_CLASSA_HOST); 279192Ssam else if (IN_CLASSB(i)) 289192Ssam return ((i)&IN_CLASSB_HOST); 299192Ssam else 309192Ssam return ((i)&IN_CLASSC_HOST); 318358Ssam } 32