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