Linux layer 7 packet classifier

https://bugs.gentoo.org/show_bug.cgi?id=255190

config.status: executing depfiles commands
make -j2
make all-am
make[1]: Entering directory
`/var/tmp/portage/net-misc/l7-filter-userspace-0.10/work/l7-filter-userspac
e-0.10'
x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I. -ggdb -O2 -MT l7-classify.o
-MD -MP -MF .deps/l7-classify.Tpo -c -o l7-classify.o l7-classify.cpp
x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I. -ggdb -O2 -MT l7-queue.o
-MD -MP -MF .deps/l7-queue.Tpo -c -o l7-queue.o l7-queue.cpp
l7-classify.cpp: In function 'char** readl7dir(std::string)':
l7-classify.cpp:160: warning: deprecated conversion from string constant to
'char*'
mv -f .deps/l7-queue.Tpo .deps/l7-queue.Po
x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I. -ggdb -O2 -MT
l7-conntrack.o -MD -MP -MF .deps/l7-conntrack.Tpo -c -o l7-conntrack.o
l7-conntrack.cpp
In file included from l7-conntrack.cpp:27:
/usr/include/linux/netfilter.h:45: error: field 'in' has incomplete type
/usr/include/linux/netfilter.h:46: error: field 'in6' has incomplete type
make[1]: *** [l7-conntrack.o] Error 1