xtables: extend matches and targets with .usersize

In matches and targets that define a kernel-only tail to their
xt_match and xt_target data structs, add a field .usersize that
specifies up to where data is to be shared with userspace.

Performed a search for comment "Used internally by the kernel" to find
relevant matches and targets. Manually inspected the structs to derive
a valid offsetof.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

path: root/ifpps/Makefile

ifpps-libs =	$(shell pkg-config --libs ncurses)

ifpps-objs =	xmalloc.o \
		ioops.o \
		str.o \
		link.o \
		sock.o \
		dev.o \
		sig.o \
		screen.o \
		ifpps.o

ifpps-eflags = $(shell pkg-config --cflags ncurses)

ifpps-confs =