#! /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)
#
PF_EXT_SLIB:=ah addrtype conntrack ecn icmp iprange owner policy realm tos ttl unclean DNAT ECN LOG MASQUERADE MIRROR NETMAP REDIRECT REJECT SAME SNAT TOS TTL ULOG
PF6_EXT_SLIB:=eui64 hl icmp6 owner policy HL LOG
PFX_EXT_SLIB:=connbytes connmark connlimit comment dscp esp hashlimit helper length limit mac mark multiport physdev pkttype quota sctp state statistic standard tcp tcpmss udp CLASSIFY CONNMARK DSCP MARK NFLOG NFQUEUE NOTRACK TCPMSS TRACE

ifeq ($(DO_SELINUX), 1)
PF_EXT_SE_SLIB:=
PF6_EXT_SE_SLIB:=
PFX_EXT_SE_SLIB:=CONNSECMARK SECMARK
endif

# 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) $(T)))
PFX_EXT_SLIB_OPTS:=$(foreach T,$(wildcard extensions/.*-testx),$(shell KERNEL_DIR=$(KERNEL_DIR) $(T)))

PF_EXT_ALL_SLIB:=$(patsubst extensions/libipt_%.c, %, $(wildcard extensions/libipt_*.c))
PF6_EXT_ALL_SLIB:=$(patsubst extensions/libip6t_%.c, %, $(wildcard extensions/libip6t_*.c))
PFX_EXT_ALL_SLIB:=$(patsubst extensions/libxt_%.c, %, $(wildcard extensions/libxt_*.c))

PF_EXT_MAN_ALL_MATCHES:=$(foreach T,$(PF_EXT_ALL_SLIB),$(shell test -f extensions/libipt_$(T).man && grep -q register_match extensions/libipt_$(T).c  && echo $(T)))
PF_EXT_MAN_ALL_TARGETS:=$(foreach T,$(PF_EXT_ALL_SLIB),$(shell test -f extensions/libipt_$(T).man && grep -q register_target extensions/libipt_$(T).c && echo $(T)))
PF6_EXT_MAN_ALL_MATCHES:=$(foreach T,$(PF6_EXT_ALL_SLIB),$(shell test -f extensions/libip6t_$(T).man && grep -q register_match6 extensions/libip6t_$(T).c  && echo $(T)))
PF6_EXT_MAN_ALL_TARGETS:=$(foreach T,$(PF6_EXT_ALL_SLIB),$(shell test -f extensions/libip6t_$(T).man && grep -q register_target6 extensions/libip6t_$(T).c && echo $(T)))

PF_EXT_MAN_MATCHES:=$(filter $(PF_EXT_ALL_SLIB), $(PF_EXT_MAN_ALL_MATCHES))
PF_EXT_MAN_TARGETS:=$(filter $(PF_EXT_ALL_SLIB), $(PF_EXT_MAN_ALL_TARGETS))
PF_EXT_MAN_EXTRA_MATCHES:=$(filter-out $(PF_EXT_MAN_MATCHES), $(PF_EXT_MAN_ALL_MATCHES))
PF_EXT_MAN_EXTRA_TARGETS:=$(filter-out $(PF_EXT_MAN_TARGETS), $(PF_EXT_MAN_ALL_TARGETS))
PF6_EXT_MAN_MATCHES:=$(filter $(PF6_EXT_ALL_SLIB), $(PF6_EXT_MAN_ALL_MATCHES))
PF6_EXT_MAN_TARGETS:=$(filter $(PF6_EXT_ALL_SLIB), $(PF6_EXT_MAN_ALL_TARGETS))
PF6_EXT_MAN_EXTRA_MATCHES:=$(filter-out $(PF6_EXT_MAN_MATCHES), $(PF6_EXT_MAN_ALL_MATCHES))
PF6_EXT_MAN_EXTRA_TARGETS:=$(filter-out $(PF6_EXT_MAN_TARGETS), $(PF6_EXT_MAN_ALL_TARGETS))


allman:
	@echo ALL_SLIB: $(PF_EXT_ALL_SLIB)
	@echo ALL_MATCH: $(PF_EXT_MAN_ALL_MATCHES)
	@echo ALL_TARGET: $(PF_EXT_MAN_ALL_TARGETS)

PF_EXT_SLIB+=$(PF_EXT_SLIB_OPTS)
PF6_EXT_SLIB+=$(PF6_EXT_SLIB_OPTS)
PFX_EXT_SLIB+=$(PFX_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_$(T).so)
SHARED_SE_LIBS+=$(foreach T,$(PF_EXT_SE_SLIB),extensions/libipt_$(T).so)
EXTRA_INSTALLS+=$(foreach T, $(PF_EXT_SLIB), $(DEST_IPT_LIBDIR)/libipt_$(T).so)
EXTRA_INSTALLS+=$(foreach T, $(PF_EXT_SE_SLIB), $(DEST_IPT_LIBDIR)/libipt_$(T).so)

ifeq ($(DO_IPV6), 1)
SHARED_LIBS+=$(foreach T,$(PF6_EXT_SLIB),extensions/libip6t_$(T).so)
SHARED_SE_LIBS+=$(foreach T,$(PF6_EXT_SE_SLIB),extensions/libip6t_$(T).so)
EXTRA_INSTALLS+=$(foreach T, $(PF6_EXT_SLIB), $(DEST_IPT_LIBDIR)/libip6t_$(T).so)
EXTRA_INSTALLS+=$(foreach T, $(PF6_EXT_SE_SLIB), $(DEST_IPT_LIBDIR)/libip6t_$(T).so)
endif

SHARED_LIBS+=$(foreach T,$(PFX_EXT_SLIB),extensions/libxt_$(T).so)
SHARED_SE_LIBS+=$(foreach T,$(PFX_EXT_SE_SLIB),extensions/libxt_$(T).so)
EXTRA_INSTALLS+=$(foreach T, $(PFX_EXT_SLIB), $(DEST_IPT_LIBDIR)/libxt_$(T).so)
EXTRA_INSTALLS+=$(foreach T, $(PFX_EXT_SE_SLIB), $(DEST_IPT_LIBDIR)/libxt_$(T).so)

else 	# NO_SHARED_LIBS
EXT_OBJS+=$(foreach T,$(PF_EXT_SLIB),extensions/libipt_$(T).o)
EXT_OBJS+=$(foreach T,$(PF_EXT_SE_SLIB),extensions/libipt_$(T).o)
EXT_OBJS+=$(foreach T,$(PFX_EXT_SLIB),extensions/libxt_$(T).o)
EXT_OBJS+=$(foreach T,$(PFX_EXT_SE_SLIB),extensions/libxt_$(T).o)
EXT_FUNC+=$(foreach T,$(PF_EXT_SLIB),ipt_$(T))
EXT_FUNC+=$(foreach T,$(PF_EXT_SE_SLIB),ipt_$(T))
EXT_FUNC+=$(foreach T,$(PFX_EXT_SLIB),xt_$(T))
EXT_FUNC+=$(foreach T,$(PFX_EXT_SE_SLIB),xt_$(T))
EXT_OBJS+= extensions/initext.o
ifeq ($(DO_IPV6), 1)
EXT6_OBJS+=$(foreach T,$(PF6_EXT_SLIB),extensions/libip6t_$(T).o)
EXT6_OBJS+=$(foreach T,$(PF6_EXT_SE_SLIB),extensions/libip6t_$(T).o)
EXT6_OBJS+=$(foreach T,$(PFX_EXT_SLIB),extensions/libxt_$(T).o)
EXT6_FUNC+=$(foreach T,$(PF6_EXT_SLIB),ip6t_$(T))
EXT6_FUNC+=$(foreach T,$(PF6_EXT_SE_SLIB),ip6t_$(T))
EXT6_FUNC+=$(foreach T,$(PFX_EXT_SLIB),xt_$(T))
EXT6_OBJS+=$(foreach T,$(PFX_EXT_SE_SLIB),extensions/libxt_$(T).o)
EXT6_FUNC+=$(foreach T,$(PFX_EXT_SE_SLIB),xt_$(T))
EXT6_OBJS+= extensions/initext6.o
endif	# DO_IPV6
endif	# NO_SHARED_LIBS

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

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

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

$(DEST_IPT_LIBDIR)/libxt_%.so: extensions/libxt_%.so
	@[ -d $(DEST_IPT_LIBDIR)/ ] || mkdir -p $(DEST_IPT_LIBDIR)/
	cp $< $@