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netfilter: ip6t_NPT: Fix prefix mangling
Make sure only the bits that are part of the prefix are mangled. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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@ -51,7 +51,7 @@ static bool ip6t_npt_map_pfx(const struct ip6t_npt_tginfo *npt,
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idx = i / 32;
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addr->s6_addr32[idx] &= mask;
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addr->s6_addr32[idx] |= npt->dst_pfx.in6.s6_addr32[idx];
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addr->s6_addr32[idx] |= ~mask & npt->dst_pfx.in6.s6_addr32[idx];
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}
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if (pfx_len <= 48)
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