4 * Copyright (C) 1993-2001 by Darren Reed.
6 * See the IPFILTER.LICENCE file for details on licencing.
8 * $Id: genmask.c,v 1.7 2003/11/11 13:40:15 darrenr Exp $
14 int genmask(msk, mskp)
21 if (strchr(msk, '.') || strchr(msk, 'x') || strchr(msk, ':')) {
22 /* possibly of the form xxx.xxx.xxx.xxx
26 if (inet_pton(AF_INET6, msk, mskp) != 1)
30 if (inet_aton(msk, (struct in_addr *)mskp) == 0)
34 * set x most significant bits
36 bits = (int)strtol(msk, &endptr, 0);
38 if ((*endptr != '\0') ||
39 ((bits > 32) && !use_inet6) || (bits < 0) ||
40 ((bits > 128) && use_inet6))
42 if (*endptr != '\0' || bits > 32 || bits < 0)
47 fill6bits(bits, mskp);
53 *mskp = htonl(0xffffffff << (32 - bits));