Imported Upstream version 5.1.0

8 files changed, 2087 insertions, 0 deletions

diff --git a/src/libcharon/plugins/kernel_libipsec/Makefile.am b/src/libcharon/plugins/kernel_libipsec/Makefile.am
new file mode 100644
index 000000000..a39d06753
--- /dev/null
+++ b/src/libcharon/plugins/kernel_libipsec/Makefile.am
@@ -0,0 +1,23 @@
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/libstrongswan \
+	-I$(top_srcdir)/src/libhydra \
+	-I$(top_srcdir)/src/libcharon \
+	-I$(top_srcdir)/src/libipsec
+
+AM_CFLAGS = \
+	-rdynamic
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-kernel-libipsec.la
+else
+plugin_LTLIBRARIES = libstrongswan-kernel-libipsec.la
+endif
+
+libstrongswan_kernel_libipsec_la_SOURCES = \
+	kernel_libipsec_plugin.h kernel_libipsec_plugin.c \
+	kernel_libipsec_ipsec.h kernel_libipsec_ipsec.c \
+	kernel_libipsec_router.h kernel_libipsec_router.c
+
+libstrongswan_kernel_libipsec_la_LIBADD = $(top_builddir)/src/libipsec/libipsec.la
+
+libstrongswan_kernel_libipsec_la_LDFLAGS = -module -avoid-version
diff --git a/src/libcharon/plugins/kernel_libipsec/Makefile.in b/src/libcharon/plugins/kernel_libipsec/Makefile.in
new file mode 100644
index 000000000..e5af6e089
--- /dev/null
+++ b/src/libcharon/plugins/kernel_libipsec/Makefile.in
@@ -0,0 +1,693 @@
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+# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software
+# Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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+	-I$(top_srcdir)/src/libipsec
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+	kernel_libipsec_ipsec.h kernel_libipsec_ipsec.c \
+	kernel_libipsec_router.h kernel_libipsec_router.c
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+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
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+libstrongswan-kernel-libipsec.la: $(libstrongswan_kernel_libipsec_la_OBJECTS) $(libstrongswan_kernel_libipsec_la_DEPENDENCIES) $(EXTRA_libstrongswan_kernel_libipsec_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libstrongswan_kernel_libipsec_la_LINK) $(am_libstrongswan_kernel_libipsec_la_rpath) $(libstrongswan_kernel_libipsec_la_OBJECTS) $(libstrongswan_kernel_libipsec_la_LIBADD) $(LIBS)
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+.c.lo:
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+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=yes @AMDEPBACKSLASH@
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LTCOMPILE) -c -o $@ $<
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
+	list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	mkid -fID $$unique
+tags: TAGS
+
+TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	set x; \
+	here=`pwd`; \
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: CTAGS
+CTAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES)
+installdirs:
+	for dir in "$(DESTDIR)$(plugindir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-noinstLTLIBRARIES \
+	clean-pluginLTLIBRARIES mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-pluginLTLIBRARIES
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
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+install-man:
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+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
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+pdf: pdf-am
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+pdf-am:
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+ps: ps-am
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+ps-am:
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+uninstall-am: uninstall-pluginLTLIBRARIES
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+	clean-libtool clean-noinstLTLIBRARIES clean-pluginLTLIBRARIES \
+	ctags distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-pluginLTLIBRARIES install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+	pdf pdf-am ps ps-am tags uninstall uninstall-am \
+	uninstall-pluginLTLIBRARIES
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_ipsec.c b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_ipsec.c
new file mode 100644
index 000000000..40f253d5a
--- /dev/null
+++ b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_ipsec.c
@@ -0,0 +1,701 @@
+/*
+ * Copyright (C) 2012-2013 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.  *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "kernel_libipsec_ipsec.h"
+#include "kernel_libipsec_router.h"
+
+#include <library.h>
+#include <ipsec.h>
+#include <hydra.h>
+#include <networking/tun_device.h>
+#include <threading/mutex.h>
+#include <utils/debug.h>
+
+typedef struct private_kernel_libipsec_ipsec_t private_kernel_libipsec_ipsec_t;
+
+struct private_kernel_libipsec_ipsec_t {
+
+	/**
+	 * Public libipsec_ipsec interface
+	 */
+	kernel_libipsec_ipsec_t public;
+
+	/**
+	 * Listener for lifetime expire events
+	 */
+	ipsec_event_listener_t ipsec_listener;
+
+	/**
+	 * Mutex to lock access to various lists
+	 */
+	mutex_t *mutex;
+
+	/**
+	 * List of installed policies (policy_entry_t)
+	 */
+	linked_list_t *policies;
+
+	/**
+	 * List of exclude routes (exclude_route_t)
+	 */
+	linked_list_t *excludes;
+};
+
+typedef struct exclude_route_t exclude_route_t;
+
+/**
+ * Exclude route definition
+ */
+struct exclude_route_t {
+	/** Destination address to exclude */
+	host_t *dst;
+	/** Source address for route */
+	host_t *src;
+	/** Nexthop exclude has been installed */
+	host_t *gtw;
+	/** References to this route */
+	int refs;
+};
+
+/**
+ * Clean up an exclude route entry
+ */
+static void exclude_route_destroy(exclude_route_t *this)
+{
+	this->dst->destroy(this->dst);
+	this->src->destroy(this->src);
+	this->gtw->destroy(this->gtw);
+	free(this);
+}
+
+/**
+ * Find an exclude route entry by destination address
+ */
+static bool exclude_route_match(exclude_route_t *current,
+								host_t *dst)
+{
+	return dst->ip_equals(dst, current->dst);
+}
+
+typedef struct route_entry_t route_entry_t;
+
+/**
+ * Installed routing entry
+ */
+struct route_entry_t {
+	/** Name of the interface the route is bound to */
+	char *if_name;
+	/** Source IP of the route */
+	host_t *src_ip;
+	/** Gateway of the route */
+	host_t *gateway;
+	/** Destination net */
+	chunk_t dst_net;
+	/** Destination net prefixlen */
+	u_int8_t prefixlen;
+	/** Reference to exclude route, if any */
+	exclude_route_t *exclude;
+};
+
+/**
+ * Destroy a route_entry_t object
+ */
+static void route_entry_destroy(route_entry_t *this)
+{
+	free(this->if_name);
+	DESTROY_IF(this->src_ip);
+	DESTROY_IF(this->gateway);
+	chunk_free(&this->dst_net);
+	free(this);
+}
+
+/**
+ * Compare two route_entry_t objects
+ */
+static bool route_entry_equals(route_entry_t *a, route_entry_t *b)
+{
+	if ((!a->src_ip && !b->src_ip) || (a->src_ip && b->src_ip &&
+		  a->src_ip->ip_equals(a->src_ip, b->src_ip)))
+	{
+		if ((!a->gateway && !b->gateway) || (a->gateway && b->gateway &&
+			  a->gateway->ip_equals(a->gateway, b->gateway)))
+		{
+			return a->if_name && b->if_name && streq(a->if_name, b->if_name) &&
+				   chunk_equals(a->dst_net, b->dst_net) &&
+				   a->prefixlen == b->prefixlen;
+		}
+	}
+	return FALSE;
+}
+
+typedef struct policy_entry_t policy_entry_t;
+
+/**
+ * Installed policy
+ */
+struct policy_entry_t {
+	/** Direction of this policy: in, out, forward */
+	u_int8_t direction;
+	/** Parameters of installed policy */
+	struct {
+		/** Subnet and port */
+		host_t *net;
+		/** Subnet mask */
+		u_int8_t mask;
+		/** Protocol */
+		u_int8_t proto;
+	} src, dst;
+	/** Associated route installed for this policy */
+	route_entry_t *route;
+	/** References to this policy */
+	int refs;
+};
+
+/**
+ * Create a policy_entry_t object
+ */
+static policy_entry_t *create_policy_entry(traffic_selector_t *src_ts,
+										   traffic_selector_t *dst_ts,
+										   policy_dir_t dir)
+{
+	policy_entry_t *this;
+	INIT(this,
+		.direction = dir,
+	);
+
+	src_ts->to_subnet(src_ts, &this->src.net, &this->src.mask);
+	dst_ts->to_subnet(dst_ts, &this->dst.net, &this->dst.mask);
+
+	/* src or dest proto may be "any" (0), use more restrictive one */
+	this->src.proto = max(src_ts->get_protocol(src_ts),
+						  dst_ts->get_protocol(dst_ts));
+	this->src.proto = this->src.proto ? this->src.proto : 0;
+	this->dst.proto = this->src.proto;
+	return this;
+}
+
+/**
+ * Destroy a policy_entry_t object
+ */
+static void policy_entry_destroy(policy_entry_t *this)
+{
+	if (this->route)
+	{
+		route_entry_destroy(this->route);
+	}
+	DESTROY_IF(this->src.net);
+	DESTROY_IF(this->dst.net);
+	free(this);
+}
+
+/**
+ * Compare two policy_entry_t objects
+ */
+static inline bool policy_entry_equals(policy_entry_t *a,
+									   policy_entry_t *b)
+{
+	return a->direction == b->direction &&
+		   a->src.proto == b->src.proto &&
+		   a->dst.proto == b->dst.proto &&
+		   a->src.mask == b->src.mask &&
+		   a->dst.mask == b->dst.mask &&
+		   a->src.net->equals(a->src.net, b->src.net) &&
+		   a->dst.net->equals(a->dst.net, b->dst.net);
+}
+
+/**
+ * Expiration callback
+ */
+static void expire(u_int32_t reqid, u_int8_t protocol, u_int32_t spi, bool hard)
+{
+	hydra->kernel_interface->expire(hydra->kernel_interface, reqid, protocol,
+									spi, hard);
+}
+
+METHOD(kernel_ipsec_t, get_features, kernel_feature_t,
+	private_kernel_libipsec_ipsec_t *this)
+{
+	return KERNEL_REQUIRE_UDP_ENCAPSULATION;
+}
+
+METHOD(kernel_ipsec_t, get_spi, status_t,
+	private_kernel_libipsec_ipsec_t *this, host_t *src, host_t *dst,
+	u_int8_t protocol, u_int32_t reqid, u_int32_t *spi)
+{
+	return ipsec->sas->get_spi(ipsec->sas, src, dst, protocol, reqid, spi);
+}
+
+METHOD(kernel_ipsec_t, get_cpi, status_t,
+	private_kernel_libipsec_ipsec_t *this, host_t *src, host_t *dst,
+	u_int32_t reqid, u_int16_t *cpi)
+{
+	return NOT_SUPPORTED;
+}
+
+METHOD(kernel_ipsec_t, add_sa, status_t,
+	private_kernel_libipsec_ipsec_t *this, host_t *src, host_t *dst,
+	u_int32_t spi, u_int8_t protocol, u_int32_t reqid, mark_t mark,
+	u_int32_t tfc, lifetime_cfg_t *lifetime, u_int16_t enc_alg, chunk_t enc_key,
+	u_int16_t int_alg, chunk_t int_key, ipsec_mode_t mode, u_int16_t ipcomp,
+	u_int16_t cpi, bool initiator, bool encap, bool esn, bool inbound,
+	traffic_selector_t *src_ts, traffic_selector_t *dst_ts)
+{
+	return ipsec->sas->add_sa(ipsec->sas, src, dst, spi, protocol, reqid, mark,
+							  tfc, lifetime, enc_alg, enc_key, int_alg, int_key,
+							  mode, ipcomp, cpi, initiator, encap, esn, inbound,
+							  src_ts, dst_ts);
+}
+
+METHOD(kernel_ipsec_t, update_sa, status_t,
+	private_kernel_libipsec_ipsec_t *this, u_int32_t spi, u_int8_t protocol,
+	u_int16_t cpi, host_t *src, host_t *dst, host_t *new_src, host_t *new_dst,
+	bool encap, bool new_encap, mark_t mark)
+{
+	return NOT_SUPPORTED;
+}
+
+METHOD(kernel_ipsec_t, query_sa, status_t,
+	private_kernel_libipsec_ipsec_t *this, host_t *src, host_t *dst,
+	u_int32_t spi, u_int8_t protocol, mark_t mark, u_int64_t *bytes,
+	u_int64_t *packets, u_int32_t *time)
+{
+	return NOT_SUPPORTED;
+}
+
+METHOD(kernel_ipsec_t, del_sa, status_t,
+	private_kernel_libipsec_ipsec_t *this, host_t *src, host_t *dst,
+	u_int32_t spi, u_int8_t protocol, u_int16_t cpi, mark_t mark)
+{
+	return ipsec->sas->del_sa(ipsec->sas, src, dst, spi, protocol, cpi, mark);
+}
+
+METHOD(kernel_ipsec_t, flush_sas, status_t,
+	private_kernel_libipsec_ipsec_t *this)
+{
+	return ipsec->sas->flush_sas(ipsec->sas);
+}
+
+/**
+ * Add an explicit exclude route to a routing entry
+ */
+static void add_exclude_route(private_kernel_libipsec_ipsec_t *this,
+							  route_entry_t *route, host_t *src, host_t *dst)
+{
+	exclude_route_t *exclude;
+	host_t *gtw;
+
+	if (this->excludes->find_first(this->excludes,
+								  (linked_list_match_t)exclude_route_match,
+								  (void**)&exclude, dst) == SUCCESS)
+	{
+		route->exclude = exclude;
+		exclude->refs++;
+	}
+
+	if (!route->exclude)
+	{
+		DBG2(DBG_KNL, "installing new exclude route for %H src %H", dst, src);
+		gtw = hydra->kernel_interface->get_nexthop(hydra->kernel_interface,
+												   dst, NULL);
+		if (gtw)
+		{
+			char *if_name = NULL;
+
+			if (hydra->kernel_interface->get_interface(
+									hydra->kernel_interface, src, &if_name) &&
+				hydra->kernel_interface->add_route(hydra->kernel_interface,
+									dst->get_address(dst),
+									dst->get_family(dst) == AF_INET ? 32 : 128,
+									gtw, src, if_name) == SUCCESS)
+			{
+				INIT(exclude,
+					.dst = dst->clone(dst),
+					.src = src->clone(src),
+					.gtw = gtw->clone(gtw),
+					.refs = 1,
+				);
+				route->exclude = exclude;
+				this->excludes->insert_last(this->excludes, exclude);
+			}
+			else
+			{
+				DBG1(DBG_KNL, "installing exclude route for %H failed", dst);
+			}
+			gtw->destroy(gtw);
+			free(if_name);
+		}
+		else
+		{
+			DBG1(DBG_KNL, "gateway lookup for %H failed", dst);
+		}
+	}
+}
+
+/**
+ * Remove an exclude route attached to a routing entry
+ */
+static void remove_exclude_route(private_kernel_libipsec_ipsec_t *this,
+								 route_entry_t *route)
+{
+	char *if_name = NULL;
+	host_t *dst;
+
+	if (!route->exclude || --route->exclude->refs > 0)
+	{
+		return;
+	}
+	this->excludes->remove(this->excludes, route->exclude, NULL);
+
+	dst = route->exclude->dst;
+	DBG2(DBG_KNL, "uninstalling exclude route for %H src %H",
+		 dst, route->exclude->src);
+	if (hydra->kernel_interface->get_interface(
+									hydra->kernel_interface,
+									route->exclude->src, &if_name) &&
+		hydra->kernel_interface->del_route(hydra->kernel_interface,
+									dst->get_address(dst),
+									dst->get_family(dst) == AF_INET ? 32 : 128,
+									route->exclude->gtw, route->exclude->src,
+									if_name) != SUCCESS)
+	{
+		DBG1(DBG_KNL, "uninstalling exclude route for %H failed", dst);
+	}
+	exclude_route_destroy(route->exclude);
+	route->exclude = NULL;
+	free(if_name);
+}
+
+/**
+ * Install a route for the given policy
+ *
+ * this->mutex is released by this function
+ */
+static bool install_route(private_kernel_libipsec_ipsec_t *this,
+	host_t *src, host_t *dst, traffic_selector_t *src_ts,
+	traffic_selector_t *dst_ts, policy_entry_t *policy)
+{
+	route_entry_t *route, *old;
+	host_t *src_ip;
+	bool is_virtual;
+
+	if (policy->direction != POLICY_OUT)
+	{
+		this->mutex->unlock(this->mutex);
+		return TRUE;
+	}
+
+	if (hydra->kernel_interface->get_address_by_ts(hydra->kernel_interface,
+									src_ts, &src_ip, &is_virtual) != SUCCESS)
+	{
+		traffic_selector_t *multicast, *broadcast = NULL;
+		bool ignore = FALSE;
+
+		this->mutex->unlock(this->mutex);
+		switch (src_ts->get_type(src_ts))
+		{
+			case TS_IPV4_ADDR_RANGE:
+				multicast = traffic_selector_create_from_cidr("224.0.0.0/4",
+															  0, 0, 0xffff);
+				broadcast = traffic_selector_create_from_cidr("255.255.255.255/32",
+															  0, 0, 0xffff);
+				break;
+			case TS_IPV6_ADDR_RANGE:
+				multicast = traffic_selector_create_from_cidr("ff00::/8",
+															  0, 0, 0xffff);
+				break;
+			default:
+				return FALSE;
+		}
+		ignore = src_ts->is_contained_in(src_ts, multicast);
+		ignore |= broadcast && src_ts->is_contained_in(src_ts, broadcast);
+		multicast->destroy(multicast);
+		DESTROY_IF(broadcast);
+		if (!ignore)
+		{
+			DBG1(DBG_KNL, "error installing route with policy %R === %R %N",
+				 src_ts, dst_ts, policy_dir_names, policy->direction);
+		}
+		return ignore;
+	}
+
+	INIT(route,
+		.if_name = router->get_tun_name(router, is_virtual ? src_ip : NULL),
+		.src_ip = src_ip,
+		.dst_net = chunk_clone(policy->dst.net->get_address(policy->dst.net)),
+		.prefixlen = policy->dst.mask,
+	);
+#ifndef __linux__
+	/* on Linux we cant't install a gateway */
+	route->gateway = hydra->kernel_interface->get_nexthop(
+											hydra->kernel_interface, dst, src);
+#endif
+
+	if (policy->route)
+	{
+		old = policy->route;
+
+		if (route_entry_equals(old, route))
+		{	/* such a route already exists */
+			route_entry_destroy(route);
+			this->mutex->unlock(this->mutex);
+			return TRUE;
+		}
+		/* uninstall previously installed route */
+		if (hydra->kernel_interface->del_route(hydra->kernel_interface,
+									old->dst_net, old->prefixlen, old->gateway,
+									old->src_ip, old->if_name) != SUCCESS)
+		{
+			DBG1(DBG_KNL, "error uninstalling route installed with policy "
+				 "%R === %R %N", src_ts, dst_ts, policy_dir_names,
+				 policy->direction);
+		}
+		route_entry_destroy(old);
+		policy->route = NULL;
+	}
+
+	if (dst_ts->is_host(dst_ts, dst))
+	{
+		DBG1(DBG_KNL, "can't install route for %R === %R %N, conflicts with "
+			 "IKE traffic", src_ts, dst_ts, policy_dir_names,
+			 policy->direction);
+		route_entry_destroy(route);
+		this->mutex->unlock(this->mutex);
+		return FALSE;
+	}
+	/* if remote traffic selector covers the IKE peer, add an exclude route */
+	if (dst_ts->includes(dst_ts, dst))
+	{
+		/* add exclude route for peer */
+		add_exclude_route(this, route, src, dst);
+	}
+
+	DBG2(DBG_KNL, "installing route: %R src %H dev %s",
+		 dst_ts, route->src_ip, route->if_name);
+
+	switch (hydra->kernel_interface->add_route(hydra->kernel_interface,
+							route->dst_net, route->prefixlen, route->gateway,
+							route->src_ip, route->if_name))
+	{
+		case ALREADY_DONE:
+			/* route exists, do not uninstall */
+			remove_exclude_route(this, route);
+			route_entry_destroy(route);
+			this->mutex->unlock(this->mutex);
+			return TRUE;
+		case SUCCESS:
+			/* cache the installed route */
+			policy->route = route;
+			this->mutex->unlock(this->mutex);
+			return TRUE;
+		default:
+			DBG1(DBG_KNL, "installing route failed: %R src %H dev %s",
+				 dst_ts, route->src_ip, route->if_name);
+			remove_exclude_route(this, route);
+			route_entry_destroy(route);
+			this->mutex->unlock(this->mutex);
+			return FALSE;
+	}
+}
+
+METHOD(kernel_ipsec_t, add_policy, status_t,
+	private_kernel_libipsec_ipsec_t *this, host_t *src, host_t *dst,
+	traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
+	policy_dir_t direction, policy_type_t type, ipsec_sa_cfg_t *sa, mark_t mark,
+	policy_priority_t priority)
+{
+	policy_entry_t *policy, *found = NULL;
+	status_t status;
+
+	if (type != POLICY_IPSEC)
+	{
+		return SUCCESS;
+	}
+
+	status = ipsec->policies->add_policy(ipsec->policies, src, dst, src_ts,
+								dst_ts, direction, type, sa, mark, priority);
+	if (status != SUCCESS)
+	{
+		return status;
+	}
+	/* we track policies in order to install routes */
+	policy = create_policy_entry(src_ts, dst_ts, direction);
+
+	this->mutex->lock(this->mutex);
+	if (this->policies->find_first(this->policies,
+								  (linked_list_match_t)policy_entry_equals,
+								  (void**)&found, policy) == SUCCESS)
+	{
+		policy_entry_destroy(policy);
+		policy = found;
+	}
+	else
+	{	/* use the new one, if we have no such policy */
+		this->policies->insert_last(this->policies, policy);
+	}
+	policy->refs++;
+
+	if (!install_route(this, src, dst, src_ts, dst_ts, policy))
+	{
+		return FAILED;
+	}
+	return SUCCESS;
+}
+
+METHOD(kernel_ipsec_t, query_policy, status_t,
+	private_kernel_libipsec_ipsec_t *this, traffic_selector_t *src_ts,
+	traffic_selector_t *dst_ts, policy_dir_t direction, mark_t mark,
+	u_int32_t *use_time)
+{
+	return NOT_SUPPORTED;
+}
+
+METHOD(kernel_ipsec_t, del_policy, status_t,
+	private_kernel_libipsec_ipsec_t *this, traffic_selector_t *src_ts,
+	traffic_selector_t *dst_ts, policy_dir_t direction, u_int32_t reqid,
+	mark_t mark, policy_priority_t priority)
+{
+	policy_entry_t *policy, *found = NULL;
+	status_t status;
+
+	status = ipsec->policies->del_policy(ipsec->policies, src_ts, dst_ts,
+										 direction, reqid, mark, priority);
+
+	policy = create_policy_entry(src_ts, dst_ts, direction);
+
+	this->mutex->lock(this->mutex);
+	if (this->policies->find_first(this->policies,
+								  (linked_list_match_t)policy_entry_equals,
+								  (void**)&found, policy) != SUCCESS)
+	{
+		policy_entry_destroy(policy);
+		this->mutex->unlock(this->mutex);
+		return status;
+	}
+	policy_entry_destroy(policy);
+	policy = found;
+
+	if (--policy->refs > 0)
+	{	/* policy is still in use */
+		this->mutex->unlock(this->mutex);
+		return status;
+	}
+
+	if (policy->route)
+	{
+		route_entry_t *route = policy->route;
+
+		if (hydra->kernel_interface->del_route(hydra->kernel_interface,
+				route->dst_net, route->prefixlen, route->gateway, route->src_ip,
+				route->if_name) != SUCCESS)
+		{
+			DBG1(DBG_KNL, "error uninstalling route installed with "
+						  "policy %R === %R %N", src_ts, dst_ts,
+						   policy_dir_names, direction);
+		}
+		remove_exclude_route(this, route);
+	}
+	this->policies->remove(this->policies, policy, NULL);
+	policy_entry_destroy(policy);
+	this->mutex->unlock(this->mutex);
+	return status;
+}
+
+METHOD(kernel_ipsec_t, flush_policies, status_t,
+	private_kernel_libipsec_ipsec_t *this)
+{
+	policy_entry_t *pol;
+	status_t status;
+
+	status = ipsec->policies->flush_policies(ipsec->policies);
+
+	this->mutex->lock(this->mutex);
+	while (this->policies->remove_first(this->policies, (void*)&pol) == SUCCESS)
+	{
+		if (pol->route)
+		{
+			route_entry_t *route = pol->route;
+
+			hydra->kernel_interface->del_route(hydra->kernel_interface,
+					route->dst_net, route->prefixlen, route->gateway,
+					route->src_ip, route->if_name);
+			remove_exclude_route(this, route);
+		}
+		policy_entry_destroy(pol);
+	}
+	this->mutex->unlock(this->mutex);
+	return status;
+}
+
+METHOD(kernel_ipsec_t, bypass_socket, bool,
+	private_kernel_libipsec_ipsec_t *this, int fd, int family)
+{
+	/* we use exclude routes for this */
+	return NOT_SUPPORTED;
+}
+
+METHOD(kernel_ipsec_t, enable_udp_decap, bool,
+	private_kernel_libipsec_ipsec_t *this, int fd, int family, u_int16_t port)
+{
+	return NOT_SUPPORTED;
+}
+
+METHOD(kernel_ipsec_t, destroy, void,
+	private_kernel_libipsec_ipsec_t *this)
+{
+	ipsec->events->unregister_listener(ipsec->events, &this->ipsec_listener);
+	this->policies->destroy_function(this->policies, (void*)policy_entry_destroy);
+	this->excludes->destroy(this->excludes);
+	this->mutex->destroy(this->mutex);
+	free(this);
+}
+
+/*
+ * Described in header.
+ */
+kernel_libipsec_ipsec_t *kernel_libipsec_ipsec_create()
+{
+	private_kernel_libipsec_ipsec_t *this;
+
+	INIT(this,
+		.public = {
+			.interface = {
+				.get_features = _get_features,
+				.get_spi = _get_spi,
+				.get_cpi = _get_cpi,
+				.add_sa  = _add_sa,
+				.update_sa = _update_sa,
+				.query_sa = _query_sa,
+				.del_sa = _del_sa,
+				.flush_sas = _flush_sas,
+				.add_policy = _add_policy,
+				.query_policy = _query_policy,
+				.del_policy = _del_policy,
+				.flush_policies = _flush_policies,
+				.bypass_socket = _bypass_socket,
+				.enable_udp_decap = _enable_udp_decap,
+				.destroy = _destroy,
+			},
+		},
+		.ipsec_listener = {
+			.expire = expire,
+		},
+		.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
+		.policies = linked_list_create(),
+		.excludes = linked_list_create(),
+	);
+
+	ipsec->events->register_listener(ipsec->events, &this->ipsec_listener);
+
+	return &this->public;
+};
diff --git a/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_ipsec.h b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_ipsec.h
new file mode 100644
index 000000000..0a4936706
--- /dev/null
+++ b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_ipsec.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2012-2013 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup kernel_libipsec_ipsec kernel_libipsec_ipsec
+ * @{ @ingroup kernel_libipsec
+ */
+
+#ifndef KERNEL_LIBIPSEC_IPSEC_H_
+#define KERNEL_LIBIPSEC_IPSEC_H_
+
+#include <library.h>
+#include <kernel/kernel_ipsec.h>
+
+typedef struct kernel_libipsec_ipsec_t kernel_libipsec_ipsec_t;
+
+/**
+ * Implementation of the ipsec interface using libipsec
+ */
+struct kernel_libipsec_ipsec_t {
+
+	/**
+	 * Implements kernel_ipsec_t interface
+	 */
+	kernel_ipsec_t interface;
+};
+
+/**
+ * Create a libipsec ipsec interface instance.
+ *
+ * @return			kernel_libipsec_ipsec_t instance
+ */
+kernel_libipsec_ipsec_t *kernel_libipsec_ipsec_create();
+
+#endif /** KERNEL_LIBIPSEC_IPSEC_H_ @}*/
diff --git a/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.c b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.c
new file mode 100644
index 000000000..56f526217
--- /dev/null
+++ b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.c
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2012-2013 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "kernel_libipsec_plugin.h"
+#include "kernel_libipsec_ipsec.h"
+#include "kernel_libipsec_router.h"
+
+#include <daemon.h>
+#include <ipsec.h>
+#include <networking/tun_device.h>
+
+#define TUN_DEFAULT_MTU 1400
+
+typedef struct private_kernel_libipsec_plugin_t private_kernel_libipsec_plugin_t;
+
+/**
+ * private data of "kernel" libipsec plugin
+ */
+struct private_kernel_libipsec_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	kernel_libipsec_plugin_t public;
+
+	/**
+	 * TUN device created by this plugin
+	 */
+	tun_device_t *tun;
+
+	/**
+	 * Packet router
+	 */
+	kernel_libipsec_router_t *router;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_kernel_libipsec_plugin_t *this)
+{
+	return "kernel-libipsec";
+}
+
+/**
+ * Create the kernel_libipsec_router_t instance
+ */
+static bool create_router(private_kernel_libipsec_plugin_t *this,
+						  plugin_feature_t *feature, bool reg, void *arg)
+{
+	if (reg)
+	{	/* registers as packet handler etc. */
+		this->router = kernel_libipsec_router_create();
+	}
+	else
+	{
+		DESTROY_IF(this->router);
+	}
+	return TRUE;
+}
+
+METHOD(plugin_t, get_features, int,
+	private_kernel_libipsec_plugin_t *this, plugin_feature_t *features[])
+{
+	static plugin_feature_t f[] = {
+		PLUGIN_CALLBACK(kernel_ipsec_register, kernel_libipsec_ipsec_create),
+			PLUGIN_PROVIDE(CUSTOM, "kernel-ipsec"),
+		PLUGIN_CALLBACK((plugin_feature_callback_t)create_router, NULL),
+			PLUGIN_PROVIDE(CUSTOM, "kernel-libipsec-router"),
+				PLUGIN_DEPENDS(CUSTOM, "libcharon-receiver"),
+	};
+	*features = f;
+	return countof(f);
+}
+
+METHOD(plugin_t, destroy, void,
+	private_kernel_libipsec_plugin_t *this)
+{
+	if (this->tun)
+	{
+		lib->set(lib, "kernel-libipsec-tun", NULL);
+		this->tun->destroy(this->tun);
+	}
+	libipsec_deinit();
+	free(this);
+}
+
+/*
+ * see header file
+ */
+plugin_t *kernel_libipsec_plugin_create()
+{
+	private_kernel_libipsec_plugin_t *this;
+
+	if (!lib->caps->check(lib->caps, CAP_NET_ADMIN))
+	{	/* required to create TUN devices */
+		DBG1(DBG_KNL, "kernel-libipsec plugin requires CAP_NET_ADMIN "
+			 "capability");
+		return NULL;
+	}
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.get_features = _get_features,
+				.destroy = _destroy,
+			},
+		},
+	);
+
+	if (!libipsec_init())
+	{
+		DBG1(DBG_LIB, "initialization of libipsec failed");
+		destroy(this);
+		return NULL;
+	}
+
+	this->tun = tun_device_create("ipsec%d");
+	if (!this->tun)
+	{
+		DBG1(DBG_KNL, "failed to create TUN device");
+		destroy(this);
+		return NULL;
+	}
+	if (!this->tun->set_mtu(this->tun, TUN_DEFAULT_MTU) ||
+		!this->tun->up(this->tun))
+	{
+		DBG1(DBG_KNL, "failed to configure TUN device");
+		destroy(this);
+		return NULL;
+	}
+	lib->set(lib, "kernel-libipsec-tun", this->tun);
+
+	/* set TUN device as default to install VIPs */
+	lib->settings->set_str(lib->settings, "%s.install_virtual_ip_on",
+						   this->tun->get_name(this->tun), charon->name);
+	return &this->public.plugin;
+}
diff --git a/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.h b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.h
new file mode 100644
index 000000000..a14426b4e
--- /dev/null
+++ b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2012-2013 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup kernel_libipsec kernel_libipsec
+ * @ingroup cplugins
+ *
+ * @defgroup kernel_libipsec_plugin kernel_libipsec_plugin
+ * @{ @ingroup kernel_libipsec
+ */
+
+#ifndef KERNEL_LIBIPSEC_PLUGIN_H_
+#define KERNEL_LIBIPSEC_PLUGIN_H_
+
+#include <library.h>
+#include <plugins/plugin.h>
+
+typedef struct kernel_libipsec_plugin_t kernel_libipsec_plugin_t;
+
+/**
+ * libipsec "kernel" interface plugin
+ */
+struct kernel_libipsec_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	plugin_t plugin;
+
+};
+
+#endif /** KERNEL_LIBIPSEC_PLUGIN_H_ @}*/
diff --git a/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_router.c b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_router.c
new file mode 100644
index 000000000..6ce1d4eb0
--- /dev/null
+++ b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_router.c
@@ -0,0 +1,365 @@
+/*
+ * Copyright (C) 2013 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "kernel_libipsec_router.h"
+
+#include <daemon.h>
+#include <hydra.h>
+#include <ipsec.h>
+#include <collections/hashtable.h>
+#include <networking/tun_device.h>
+#include <threading/rwlock.h>
+#include <threading/thread.h>
+#include <processing/jobs/callback_job.h>
+
+typedef struct private_kernel_libipsec_router_t private_kernel_libipsec_router_t;
+
+/**
+ * Entry in the TUN device map
+ */
+typedef struct {
+	/** virtual IP (points to internal data of tun) */
+	host_t *addr;
+	/** underlying TUN file descriptor (cached from tun) */
+	int fd;
+	/** TUN device */
+	tun_device_t *tun;
+} tun_entry_t;
+
+/**
+ * Single instance of the router
+ */
+kernel_libipsec_router_t *router;
+
+/**
+ * Private data
+ */
+struct private_kernel_libipsec_router_t {
+
+	/**
+	 * Public interface
+	 */
+	kernel_libipsec_router_t public;
+
+	/**
+	 * Default TUN device if kernel interface does not require separate TUN
+	 * devices per VIP or for tunnels without VIP.
+	 */
+	tun_entry_t tun;
+
+	/**
+	 * Hashtable that maps virtual IPs to TUN devices (tun_entry_t).
+	 */
+	hashtable_t *tuns;
+
+	/**
+	 * Lock for TUN device map
+	 */
+	rwlock_t *lock;
+
+	/**
+	 * Pipe to signal handle_plain() about changes regarding TUN devices
+	 */
+	int notify[2];
+};
+
+/**
+ * Hash function for TUN device map
+ */
+static u_int tun_entry_hash(tun_entry_t *entry)
+{
+	return chunk_hash(entry->addr->get_address(entry->addr));
+}
+
+/**
+ * Comparison function for TUN device map
+ */
+static bool tun_entry_equals(tun_entry_t *a, tun_entry_t *b)
+{
+	return a->addr->ip_equals(a->addr, b->addr);
+}
+
+/**
+ * Outbound callback
+ */
+static void send_esp(void *data, esp_packet_t *packet)
+{
+	charon->sender->send_no_marker(charon->sender, (packet_t*)packet);
+}
+
+/**
+ * Receiver callback
+ */
+static void receiver_esp_cb(void *data, packet_t *packet)
+{
+	ipsec->processor->queue_inbound(ipsec->processor,
+									esp_packet_create_from_packet(packet));
+}
+
+/**
+ * Inbound callback
+ */
+static void deliver_plain(private_kernel_libipsec_router_t *this,
+						  ip_packet_t *packet)
+{
+	tun_device_t *tun;
+	tun_entry_t *entry, lookup = {
+		.addr = packet->get_destination(packet),
+	};
+
+	this->lock->read_lock(this->lock);
+	entry = this->tuns->get(this->tuns, &lookup);
+	tun = entry ? entry->tun : this->tun.tun;
+	tun->write_packet(tun, packet->get_encoding(packet));
+	this->lock->unlock(this->lock);
+	packet->destroy(packet);
+}
+
+/**
+ * Create an FD set covering all TUN devices and the read end of the notify pipe
+ */
+static int collect_fds(private_kernel_libipsec_router_t *this, fd_set *fds)
+{
+	enumerator_t *enumerator;
+	tun_entry_t *entry;
+	int maxfd;
+
+	FD_ZERO(fds);
+	FD_SET(this->notify[0], fds);
+	maxfd = this->notify[0];
+
+	FD_SET(this->tun.fd, fds);
+	maxfd = max(maxfd, this->tun.fd);
+
+	this->lock->read_lock(this->lock);
+	enumerator = this->tuns->create_enumerator(this->tuns);
+	while (enumerator->enumerate(enumerator, NULL, &entry))
+	{
+		FD_SET(entry->fd, fds);
+		maxfd = max(maxfd, entry->fd);
+	}
+	enumerator->destroy(enumerator);
+	this->lock->unlock(this->lock);
+
+	return maxfd + 1;
+}
+
+/**
+ * Read and process outbound plaintext packet for the given TUN device
+ */
+static void process_plain(tun_device_t *tun)
+{
+	chunk_t raw;
+
+	if (tun->read_packet(tun, &raw))
+	{
+		ip_packet_t *packet;
+
+		packet = ip_packet_create(raw);
+		if (packet)
+		{
+			ipsec->processor->queue_outbound(ipsec->processor, packet);
+		}
+		else
+		{
+			DBG1(DBG_KNL, "invalid IP packet read from TUN device");
+		}
+	}
+}
+
+/**
+ * Handle waiting data for any TUN device
+ */
+static void handle_tuns(private_kernel_libipsec_router_t *this, fd_set *fds)
+{
+	enumerator_t *enumerator;
+	tun_entry_t *entry;
+
+	if (FD_ISSET(this->tun.fd, fds))
+	{
+		process_plain(this->tun.tun);
+	}
+
+	this->lock->read_lock(this->lock);
+	enumerator = this->tuns->create_enumerator(this->tuns);
+	while (enumerator->enumerate(enumerator, NULL, &entry))
+	{
+		if (FD_ISSET(entry->fd, fds))
+		{
+			process_plain(entry->tun);
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->lock->unlock(this->lock);
+}
+
+/**
+ * Job handling outbound plaintext packets
+ */
+static job_requeue_t handle_plain(private_kernel_libipsec_router_t *this)
+{
+	bool oldstate;
+	fd_set fds;
+	int maxfd;
+
+	maxfd = collect_fds(this, &fds);
+
+	oldstate = thread_cancelability(TRUE);
+	if (select(maxfd, &fds, NULL, NULL, NULL) <= 0)
+	{
+		thread_cancelability(oldstate);
+		return JOB_REQUEUE_FAIR;
+	}
+	thread_cancelability(oldstate);
+
+	if (FD_ISSET(this->notify[0], &fds))
+	{	/* list of TUN devices changed, read notification data, rebuild FDs */
+		char buf[1];
+		while (read(this->notify[0], &buf, sizeof(buf)) == sizeof(buf));
+		return JOB_REQUEUE_DIRECT;
+	}
+
+	handle_tuns(this, &fds);
+	return JOB_REQUEUE_DIRECT;
+}
+
+METHOD(kernel_listener_t, tun, bool,
+	private_kernel_libipsec_router_t *this, tun_device_t *tun, bool created)
+{
+	tun_entry_t *entry, lookup;
+	char buf[] = {0x01};
+
+	this->lock->write_lock(this->lock);
+	if (created)
+	{
+		INIT(entry,
+			.addr = tun->get_address(tun, NULL),
+			.fd = tun->get_fd(tun),
+			.tun = tun,
+		);
+		this->tuns->put(this->tuns, entry, entry);
+	}
+	else
+	{
+		lookup.addr = tun->get_address(tun, NULL);
+		entry = this->tuns->remove(this->tuns, &lookup);
+		free(entry);
+	}
+	/* notify handler thread to recreate FD set */
+	ignore_result(write(this->notify[1], buf, sizeof(buf)));
+	this->lock->unlock(this->lock);
+	return TRUE;
+}
+
+METHOD(kernel_libipsec_router_t, get_tun_name, char*,
+	private_kernel_libipsec_router_t *this, host_t *vip)
+{
+	tun_entry_t *entry, lookup = {
+		.addr = vip,
+	};
+	tun_device_t *tun;
+	char *name;
+
+	if (!vip)
+	{
+		return strdup(this->tun.tun->get_name(this->tun.tun));
+	}
+	this->lock->read_lock(this->lock);
+	entry = this->tuns->get(this->tuns, &lookup);
+	tun = entry ? entry->tun : this->tun.tun;
+	name = strdup(tun->get_name(tun));
+	this->lock->unlock(this->lock);
+	return name;
+}
+
+METHOD(kernel_libipsec_router_t, destroy, void,
+	private_kernel_libipsec_router_t *this)
+{
+	charon->receiver->del_esp_cb(charon->receiver,
+								(receiver_esp_cb_t)receiver_esp_cb);
+	ipsec->processor->unregister_outbound(ipsec->processor,
+										 (ipsec_outbound_cb_t)send_esp);
+	ipsec->processor->unregister_inbound(ipsec->processor,
+										 (ipsec_inbound_cb_t)deliver_plain);
+	hydra->kernel_interface->remove_listener(hydra->kernel_interface,
+											 &this->public.listener);
+	this->lock->destroy(this->lock);
+	this->tuns->destroy(this->tuns);
+	close(this->notify[0]);
+	close(this->notify[1]);
+	router = NULL;
+	free(this);
+}
+
+/**
+ * Set O_NONBLOCK on the given socket.
+ */
+static bool set_nonblock(int socket)
+{
+	int flags = fcntl(socket, F_GETFL);
+	return flags != -1 && fcntl(socket, F_SETFL, flags | O_NONBLOCK) != -1;
+}
+
+/*
+ * See header file
+ */
+kernel_libipsec_router_t *kernel_libipsec_router_create()
+{
+	private_kernel_libipsec_router_t *this;
+
+	INIT(this,
+		.public = {
+			.listener = {
+				.tun = _tun,
+			},
+			.get_tun_name = _get_tun_name,
+			.destroy = _destroy,
+		},
+		.tun = {
+			.tun = lib->get(lib, "kernel-libipsec-tun"),
+		}
+	);
+
+	if (pipe(this->notify) != 0 ||
+		!set_nonblock(this->notify[0]) || !set_nonblock(this->notify[1]))
+	{
+		DBG1(DBG_KNL, "creating notify pipe for kernel-libipsec router failed");
+		free(this);
+		return NULL;
+	}
+
+	this->tun.fd = this->tun.tun->get_fd(this->tun.tun);
+
+	this->tuns = hashtable_create((hashtable_hash_t)tun_entry_hash,
+								  (hashtable_equals_t)tun_entry_equals, 4);
+	this->lock = rwlock_create(RWLOCK_TYPE_DEFAULT);
+
+	hydra->kernel_interface->add_listener(hydra->kernel_interface,
+										  &this->public.listener);
+	ipsec->processor->register_outbound(ipsec->processor, send_esp, NULL);
+	ipsec->processor->register_inbound(ipsec->processor,
+									(ipsec_inbound_cb_t)deliver_plain, this);
+	charon->receiver->add_esp_cb(charon->receiver,
+									(receiver_esp_cb_t)receiver_esp_cb, NULL);
+	lib->processor->queue_job(lib->processor,
+			(job_t*)callback_job_create((callback_job_cb_t)handle_plain, this,
+									NULL, (callback_job_cancel_t)return_false));
+
+	router = &this->public;
+	return &this->public;
+}
diff --git a/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_router.h b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_router.h
new file mode 100644
index 000000000..7b2f3c6c5
--- /dev/null
+++ b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_router.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2013 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup kernel_libipsec_router kernel_libipsec_router
+ * @{ @ingroup kernel_libipsec
+ */
+
+#ifndef KERNEL_LIBIPSEC_ROUTER_H_
+#define KERNEL_LIBIPSEC_ROUTER_H_
+
+#include <kernel/kernel_listener.h>
+
+typedef struct kernel_libipsec_router_t kernel_libipsec_router_t;
+
+/**
+ * Class that routes the network packets between TUN device, libipsec and
+ * charon's IKE socket.
+ */
+struct kernel_libipsec_router_t {
+
+	/**
+	 * Implements kernel_listener_t interface
+	 */
+	kernel_listener_t listener;
+
+	/**
+	 * Get the name of the TUN device to be used with the given virtual IP.
+	 *
+	 * @param vip	virtual IP
+	 * @return		allocated name
+	 */
+	char *(*get_tun_name)(kernel_libipsec_router_t *this, host_t *vip);
+
+	/**
+	 * Destroy the given instance
+	 */
+	void (*destroy)(kernel_libipsec_router_t *this);
+};
+
+/**
+ * Single instance of this class, if created
+ */
+extern kernel_libipsec_router_t *router;
+
+/**
+ * Create a kernel_libipsec_router_t instance.
+ *
+ * @return			kernel_libipsec_router_t instance
+ */
+kernel_libipsec_router_t *kernel_libipsec_router_create();
+
+#endif /** KERNEL_LIBIPSEC_ROUTER_H_ @}*/