69 lines
1.2 KiB
C
69 lines
1.2 KiB
C
/*
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* Copyright (C) 2012 by Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*
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* $Id$
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*/
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#include "ipf.h"
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int genmask(family, msk, mskp)
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int family;
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char *msk;
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i6addr_t *mskp;
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{
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char *endptr = 0L;
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u_32_t addr;
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int bits;
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if (strchr(msk, '.') || strchr(msk, 'x') || strchr(msk, ':')) {
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/* possibly of the form xxx.xxx.xxx.xxx
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* or 0xYYYYYYYY */
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switch (family)
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{
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#ifdef USE_INET6
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case AF_INET6 :
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if (inet_pton(AF_INET6, msk, &mskp->in4) != 1)
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return (-1);
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break;
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#endif
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case AF_INET :
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if (inet_aton(msk, &mskp->in4) == 0)
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return (-1);
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break;
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default :
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return (-1);
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/*NOTREACHED*/
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}
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} else {
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/*
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* set x most significant bits
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*/
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bits = (int)strtol(msk, &endptr, 0);
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switch (family)
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{
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case AF_INET6 :
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if ((*endptr != '\0') || (bits < 0) || (bits > 128))
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return (-1);
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fill6bits(bits, mskp->i6);
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break;
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case AF_INET :
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if (*endptr != '\0' || bits > 32 || bits < 0)
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return (-1);
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if (bits == 0)
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addr = 0;
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else
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addr = htonl(0xffffffff << (32 - bits));
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mskp->in4.s_addr = addr;
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break;
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default :
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return (-1);
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/*NOTREACHED*/
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}
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}
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return (0);
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}
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