[PATCH 01/05] secmark: Add libselinux support

This patch adds the infrastructure for linking iptables against
libselinux, for use with the SECMARK target.  This is enabled
by setting DO_SELINUX=1 in the build environment.


Signed-off-by: James Morris <jmorris@namei.org>

3 files changed, 36 insertions, 4 deletions

diff --git a/Makefile b/Makefile
index 558367e..12cc34b 100644
--- a/Makefile
+++ b/Makefile
@@ -31,6 +31,11 @@ ifeq ($(shell [ -f /usr/include/netinet/ip6.h ] && echo YES), YES)
 DO_IPV6:=1
 endif
 
+# Enable linking to libselinux via enviornment 'DO_SELINUX=1'
+ifndef DO_SELINUX
+DO_SELINUX=0
+endif
+
 COPT_FLAGS:=-O2
 CFLAGS:=$(COPT_FLAGS) -Wall -Wunused -I$(KERNEL_DIR)/include -Iinclude/ -DIPTABLES_VERSION=\"$(IPTABLES_VERSION)\" #-g -DDEBUG #-pg # -DIPTC_DEBUG
 
@@ -93,17 +98,24 @@ endif
 
 ifndef NO_SHARED_LIBS
 DEPFILES = $(SHARED_LIBS:%.so=%.d)
+DEPFILES += $(SHARED_SE_LIBS:%.so=%.d)
 SH_CFLAGS:=$(CFLAGS) -fPIC
 STATIC_LIBS  =
 STATIC6_LIBS =
 LDFLAGS      = -rdynamic
 LDLIBS       = -ldl -lnsl
+ifeq ($(DO_SELINUX), 1)
+LDLIBS       += -lselinux
+endif
 else
 DEPFILES = $(EXT_OBJS:%.o=%.d)
 STATIC_LIBS  = extensions/libext.a
 STATIC6_LIBS = extensions/libext6.a
 LDFLAGS      = -static
-LDLIBS       =
+LDLIBS	     =
+ifeq ($(DO_SELINUX), 1)
+LDLIBS       += -lselinux
+endif
 endif
 
 .PHONY: default
diff --git a/Rules.make b/Rules.make
index 6332c8d..ffc8996 100644
--- a/Rules.make
+++ b/Rules.make
@@ -1,12 +1,12 @@
 #! /usr/bin/make
 
-all: $(SHARED_LIBS) $(EXTRAS)
+all: $(SHARED_LIBS) $(SHARED_SE_LIBS) $(EXTRAS)
 
 experimental: $(EXTRAS_EXP)
 
 # Have to handle extensions which no longer exist.
 clean: $(EXTRA_CLEANS)
-	rm -f $(SHARED_LIBS) $(EXTRAS) $(EXTRAS_EXP) $(SHARED_LIBS:%.so=%_sh.o)
+	rm -f $(SHARED_LIBS) $(SHARED_SE_LIBS) $(EXTRAS) $(EXTRAS_EXP) $(SHARED_LIBS:%.so=%_sh.o) $(SHARED_SE_LIBS:%.so=%_sh.o)
 	rm -f extensions/initext.c extensions/initext6.c
 	@find . -name '*.[ao]' -o -name '*.so' | xargs rm -f
 
@@ -33,6 +33,13 @@ $(SHARED_LIBS:%.so=%.d): %.d: %.c
 $(SHARED_LIBS): %.so : %_sh.o
 	$(LD) -shared $(EXT_LDFLAGS) -o $@ $<
 
+$(SHARED_SE_LIBS:%.so=%.d): %.d: %.c
+	@-$(CC) -M -MG $(CFLAGS) $< | \
+		sed -e 's@^.*\.o:@$*.d $*_sh.o:@' > $@
+
+$(SHARED_SE_LIBS): %.so : %_sh.o
+	$(LD) -shared $(EXT_LDFLAGS) -o $@ $< $(LDLIBS)
+
 %_sh.o : %.c
 	$(CC) $(SH_CFLAGS) -o $@ -c $<
 
diff --git a/extensions/Makefile b/extensions/Makefile
index af051f8..c8c9f90 100644
--- a/extensions/Makefile
+++ b/extensions/Makefile
@@ -8,6 +8,11 @@
 PF_EXT_SLIB:=ah addrtype comment connlimit connmark conntrack dscp ecn esp hashlimit helper icmp iprange length limit mac mark multiport owner physdev pkttype policy realm rpc sctp standard state tcp tcpmss tos ttl udp unclean CLASSIFY CONNMARK DNAT DSCP ECN LOG MARK MASQUERADE MIRROR NETMAP NFQUEUE NOTRACK REDIRECT REJECT SAME SNAT TARPIT TCPMSS TOS TRACE TTL ULOG
 PF6_EXT_SLIB:=connmark eui64 hl icmp6 length limit mac mark multiport owner physdev policy standard state tcp udp CONNMARK HL LOG NFQUEUE MARK TRACE
 
+ifeq ($(DO_SELINUX), 1)
+PF_EXT_SE_SLIB:=
+PF6_EXT_SE_SLIB:=
+endif
+
 # Optionals
 PF_EXT_SLIB_OPTS:=$(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) $(T)))
@@ -43,26 +48,34 @@ OPTIONALS+=$(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), $(DESTDIR)$(LIBDIR)/iptables/libipt_$(T).so)
+EXTRA_INSTALLS+=$(foreach T, $(PF_EXT_SE_SLIB), $(DESTDIR)$(LIBDIR)/iptables/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), $(DESTDIR)$(LIBDIR)/iptables/libip6t_$(T).so)
+EXTRA_INSTALLS+=$(foreach T, $(PF6_EXT_SE_SLIB), $(DESTDIR)$(LIBDIR)/iptables/libip6t_$(T).so)
 endif
 else 	# NO_SHARED_LIBS
 EXT_OBJS+=$(foreach T,$(PF_EXT_SLIB),extensions/libipt_$(T).o)
+EXT_OBJS+=$(foreach T,$(PF_EXT_SE_SLIB),extensions/libipt_$(T).o)
 EXT_FUNC+=$(foreach T,$(PF_EXT_SLIB),ipt_$(T))
+EXT_FUNC+=$(foreach T,$(PF_EXT_SE_SLIB),ipt_$(T))
 EXT_OBJS+= extensions/initext.o
 ifeq ($(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_FUNC+=$(foreach T,$(PF6_EXT_SLIB),ip6t_$(T))
+EXT6_FUNC+=$(foreach T,$(PF6_EXT_SE_SLIB),ip6t_$(T))
 EXT6_OBJS+= extensions/initext6.o
 endif	# DO_IPV6
 endif	# NO_SHARED_LIBS
 
 ifndef TOPLEVEL_INCLUDED
 local:
-	cd .. && $(MAKE) $(SHARED_LIBS)
+	cd .. && $(MAKE) $(SHARED_LIBS) $(SHARED_SE_LIBS)
 endif
 
 ifdef NO_SHARED_LIBS