#! /usr/bin/make

# WARNING:
# only add extensions here that are either present in the kernel, or whose
# header files are present in the include/linux directory of this iptables
# package (HW)
#
# I'm not sure that all those extentions will be used in linksys router...
#PF_EXT_SLIB:=ah connlimit connmark conntrack dscp ecn esp helper icmp iprange length limit mac mark multiport owner physdev pkttype realm rpc standard state tcp tcpmss tos ttl udp unclean CLASSIFY CONNMARK DNAT DSCP ECN LOG MARK MASQUERADE MIRROR NETMAP NOTRACK REDIRECT REJECT SAME SNAT TARPIT TCPMSS TOS TRACE TTL ULOG
#PF_EXT_SLIB:=connlimit connmark conntrack helper icmp iprange limit mac mark multiport physdev pkttype realm rpc standard state tcp tcpmss tos ttl udp unclean CLASSIFY CONNMARK DNAT LOG MARK MASQUERADE NETMAP NOTRACK REDIRECT REJECT SAME SNAT TARPIT TCPMSS TOS TTL ROUTE childlevel condition layer7 mport pool POOL time webstr
PF_EXT_SLIB:= CLASSIFY ah connlimit connmark conntrack dscp ecn esp helper icmp iprange length limit mac mark multiport owner physdev pkttype realm rpc standard state tcp tcpmss tos ttl udp unclean CONNMARK DNAT DSCP ECN LOG MARK MASQUERADE MIRROR NETMAP NOTRACK REDIRECT REJECT SAME SNAT TARPIT TCPMSS TOS TRACE TTL ULOG p2p ROUTE childlevel condition layer7 mport pool POOL time webstr IMQ TRIGGER ipp2p

PF6_EXT_SLIB:=eui64 hl icmpv6 length limit mac mark multiport owner standard tcp udp HL LOG MARK TRACE ROUTE condition

# Optionals
PF_EXT_SLIB_OPTS:=$(foreach T,$(wildcard extensions/.*-test),$(shell KERNEL_DIR=$(KERNEL_DIR) $(T)))
PF6_EXT_SLIB_OPTS:=$(foreach T,$(wildcard extensions/.*-test6),$(shell KERNEL_DIR=$(KERNEL_DIR) $(T)))

PF_EXT_SLIB+=$(PF_EXT_SLIB_OPTS)
PF6_EXT_SLIB+=$(PF6_EXT_SLIB_OPTS)

OPTIONALS+=$(patsubst %,IPv4:%,$(PF_EXT_SLIB_OPTS))
OPTIONALS+=$(patsubst %,IPv6:%,$(PF6_EXT_SLIB_OPTS))

ifndef NO_SHARED_LIBS
SHARED_LIBS+=$(foreach T,$(PF_EXT_SLIB),extensions/libipt_$(T).so)
EXTRA_INSTALLS+=$(foreach T, $(PF_EXT_SLIB), $(DESTDIR)$(LIBDIR)/iptables/libipt_$(T).so)

ifeq ($(DO_IPV6), 1)
SHARED_LIBS+=$(foreach T,$(PF6_EXT_SLIB),extensions/libip6t_$(T).so)
EXTRA_INSTALLS+=$(foreach T, $(PF6_EXT_SLIB), $(DESTDIR)$(LIBDIR)/iptables/libip6t_$(T).so)
endif
else 	# NO_SHARED_LIBS
EXT_OBJS+=$(foreach T,$(PF_EXT_SLIB),extensions/libipt_$(T).o)
EXT_FUNC+=$(foreach T,$(PF_EXT_SLIB),ipt_$(T))
EXT_OBJS+= extensions/initext.o
ifeq ($(DO_IPV6), 1)
EXT6_OBJS+=$(foreach T,$(PF6_EXT_SLIB),extensions/libip6t_$(T).o)
EXT6_FUNC+=$(foreach T,$(PF6_EXT_SLIB),ip6t_$(T))
EXT6_OBJS+= extensions/initext6.o
endif	# DO_IPV6
endif	# NO_SHARED_LIBS

ifndef TOPLEVEL_INCLUDED
local:
	cd .. && $(MAKE) $(SHARED_LIBS)
endif

ifdef NO_SHARED_LIBS
extensions/libext.a: $(EXT_OBJS)
	rm -f $@; ar crv $@ $(EXT_OBJS)

extensions/libext6.a: $(EXT6_OBJS)
	rm -f $@; ar crv $@ $(EXT6_OBJS)

extensions/initext.o: extensions/initext.c
extensions/initext6.o: extensions/initext6.c

extensions/initext.c: extensions/Makefile
	echo "" > $@
	for i in $(EXT_FUNC); do \
		echo "extern void $${i}_init(void);" >> $@; \
	done
	echo "void init_extensions(void) {" >> $@
	for i in $(EXT_FUNC); do \
		echo "	$${i}_init();" >> $@; \
	done
	echo "}" >> $@

extensions/initext6.c: extensions/Makefile
	echo "" > $@
	for i in $(EXT6_FUNC); do \
		echo "extern void $${i}_init(void);" >> $@; \
	done
	echo "void init_extensions(void) {" >> $@
	for i in $(EXT6_FUNC); do \
		echo "	$${i}_init();" >> $@; \
	done
	echo "}" >> $@

extensions/lib%.o: extensions/lib%.c
	$(CC) $(CFLAGS) -D_INIT=$*_init -c -o $@ $<

endif
 
EXTRAS += extensions/libipt_targets.man
extensions/libipt_targets.man: $(patsubst %,extensions/libipt_%.man,$(PF_EXT_MAN_ALL_TARGETS))
	@for ext in $(PF_EXT_MAN_TARGETS); do \
	    echo ".SS $$ext" ;\
	    cat extensions/libipt_$$ext.man ;\
	done >extensions/libipt_targets.man
	@if [ -n "$(PF_EXT_MAN_EXTRA_TARGETS)" ]; then \
	    extra=$(PF_EXT_MAN_EXTRA_TARGETS) ;\
	    for ext in $${extra:-""}; do \
		echo ".SS $$ext (not supported, see Patch-O-Matic)" ;\
		cat extensions/libipt_$$ext.man ;\
	    done ;\
       	fi >>extensions/libipt_targets.man

EXTRAS += extensions/libipt_matches.man
extensions/libipt_matches.man: $(patsubst %,extensions/libipt_%.man,$(PF_EXT_MAN_ALL_MATCHES))
	@for ext in $(PF_EXT_MAN_MATCHES); do \
	    echo ".SS $$ext" ;\
	    cat extensions/libipt_$$ext.man ;\
	done >extensions/libipt_matches.man
	@if [ -n "$(PF_EXT_MAN_EXTRA_MATCHES)" ]; then \
	    extra=$(PF_EXT_MAN_EXTRA_MATCHES) ;\
	    for ext in $${extra:-""}; do \
		echo ".SS $$ext (not supported, see Patch-O-Matic)" ;\
		cat extensions/libipt_$$ext.man ;\
	    done ;\
       	fi >>extensions/libipt_matches.man

EXTRAS += extensions/libip6t_targets.man
extensions/libip6t_targets.man: $(patsubst %, extensions/libip6t_%.man, $(PF6_EXT_MAN_ALL_TARGETS))
	@for ext in $(PF6_EXT_MAN_TARGETS); do \
	    echo ".SS $$ext" ;\
	    cat extensions/libip6t_$$ext.man ;\
	done >extensions/libip6t_targets.man
	@if [ -n "$(PF6_EXT_MAN_EXTRA_TARGETS)" ]; then \
	    extra=$(PF6_EXT_MAN_EXTRA_TARGETS) ;\
	    for ext in $${extra:-""}; do \
		echo ".SS $$ext (not supported, see Patch-O-Matic)" ;\
		cat extensions/libip6t_$$ext.man ;\
	    done ;\
       	fi >>extensions/libip6t_targets.man

EXTRAS += extensions/libip6t_matches.man
extensions/libip6t_matches.man: $(patsubst %, extensions/libip6t_%.man, $(PF6_EXT_MAN_ALL_MATCHES))
	@for ext in $(PF6_EXT_MAN_MATCHES); do \
	    echo ".SS $$ext" ;\
	    cat extensions/libip6t_$$ext.man ;\
	done >extensions/libip6t_matches.man
	@if [ -n "$(PF6_EXT_MAN_EXTRA_MATCHES)" ]; then \
	    extra=$(PF6_EXT_MAN_EXTRA_MATCHES) ;\
	    for ext in $${extra:-""}; do \
		echo ".SS $$ext (not supported, see Patch-O-Matic)" ;\
		cat extensions/libip6t_$$ext.man ;\
	    done ;\
       	fi >>extensions/libip6t_matches.man

$(DESTDIR)$(LIBDIR)/iptables/libipt_%.so: extensions/libipt_%.so
	@[ -d $(DESTDIR)$(LIBDIR)/iptables ] || mkdir -p $(DESTDIR)$(LIBDIR)/iptables
	cp $< $@

$(DESTDIR)$(LIBDIR)/iptables/libip6t_%.so: extensions/libip6t_%.so
	@[ -d $(DESTDIR)$(LIBDIR)/iptables ] || mkdir -p $(DESTDIR)$(LIBDIR)/iptables
	cp $< $@
