diff options
Diffstat (limited to 'lib/ntomask.c')
-rw-r--r-- | lib/ntomask.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/lib/ntomask.c b/lib/ntomask.c new file mode 100644 index 0000000..4a50ef8 --- /dev/null +++ b/lib/ntomask.c @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2002-2005 by Darren Reed. + * + * See the IPFILTER.LICENCE file for details on licencing. + * + * $Id: ntomask.c,v 1.6.2.1 2006/06/16 17:21:07 darrenr Exp $ + */ + +#include "ipf.h" + +int ntomask(v, nbits, ap) +int v, nbits; +u_32_t *ap; +{ + u_32_t mask; + + if (nbits < 0) + return -1; + + switch (v) + { + case 4 : + if (nbits > 32 || use_inet6 != 0) + return -1; + if (nbits == 0) { + mask = 0; + } else { + mask = 0xffffffff; + mask <<= (32 - nbits); + } + *ap = htonl(mask); + break; + + case 6 : + if ((nbits > 128) || (use_inet6 == 0)) + return -1; + fill6bits(nbits, ap); + break; + + default : + return -1; + } + return 0; +} |