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/* ISC license. */
#include <stdint.h>
#include <errno.h>
#include <dirent.h>
#include <skalibs/uint16.h>
#include <skalibs/uint32.h>
#include <skalibs/diuint32.h>
#include <skalibs/genalloc.h>
#include <skalibs/direntry.h>
#include <skalibs/ip46.h>
#include "shibari-internal.h"
static int shibari_whitelist_add4 (genalloc *g, char const *ip4, uint16_t mask)
{
diuint32 d = { .right = ((uint32_t)1 << mask) - 1 } ;
uint32_unpack_big(ip4, &d.left) ;
d.left &= d.right ;
return genalloc_append(diuint32, g, &d) ;
}
int shibari_whitelist_read (char const *path, genalloc *ip4, genalloc *ip6)
{
DIR *dir = opendir(path) ;
if (!dir) return 0 ;
genalloc_setlen(diuint32, ip4, 0) ;
genalloc_setlen(shibari_ip6_t, ip6, 0) ;
for (;;)
{
direntry *d ;
size_t pos ;
ip46 ip ;
uint16_t mask ;
errno = 0 ;
d = readdir(dir) ;
if (!d) break ;
if (d->d_name[0] == '.' && (!d->d_name[1] || (d->d_name[1] == '.' && !d->d_name[2]))) continue ;
pos = ip46_scan(d->d_name, &ip) ;
if (!pos) continue ;
if (d->d_name[pos] && d->d_name[pos] != '_') continue ;
if (!d->d_name[pos]) mask = ip46_is6(&ip) ? 128 : 32 ;
else
{
if (!uint160_scan(d->d_name + pos + 1, &mask)) continue ;
if (mask > (ip46_is6(&ip) ? 128 : 32)) continue ;
}
if (!(ip46_is6(&ip) ? shibari_whitelist_add6(ip6, ip.ip, mask) : shibari_whitelist_add4(ip4, ip.ip, mask))) goto err ;
}
if (errno) goto err ;
dir_close(dir) ;
return 1 ;
err:
dir_close(dir) ;
return 0 ;
}
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