diff options
Diffstat (limited to 'usr/src/lib/libbc/libc/inet/inet_netof.c')
| -rw-r--r-- | usr/src/lib/libbc/libc/inet/inet_netof.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/usr/src/lib/libbc/libc/inet/inet_netof.c b/usr/src/lib/libbc/libc/inet/inet_netof.c new file mode 100644 index 0000000000..7e7359f79d --- /dev/null +++ b/usr/src/lib/libbc/libc/inet/inet_netof.c @@ -0,0 +1,43 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +#pragma ident "%Z%%M% %I% %E% SMI" + /* from UCB 4.3 82/11/14 */ + +#include <sys/types.h> +#include <netinet/in.h> + +/* + * Return the network number from an internet + * address; handles class a/b/c network #'s. + */ +inet_netof(in) + struct in_addr in; +{ + register u_long i = ntohl(in.s_addr); + + if (IN_CLASSA(i)) + return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT); + else if (IN_CLASSB(i)) + return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT); + else + return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT); +} |