libnetfilter_conntrack with IPv4 & IPv6

Washington Ratso

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07-07-2011, 10:07 PM

I have been using libnetfilter_conntrack to track connections, which
have had IPv4 sources and destinations. Now, I want to upgrade my code
to handle IPv6 sources and destinations. How do I determine if the
source or destination is IPv4 or IPv6? For source, do I have to call
nfct_get_attr twice, once with the ATTR_IPV4_SRC argument and once
with the ATTR_IPV6_SRC argument? Will one return null and the other
not null?

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