Imported Upstream version 4.5.2

9 files changed, 1462 insertions, 0 deletions

diff --git a/src/libcharon/plugins/duplicheck/Makefile.am b/src/libcharon/plugins/duplicheck/Makefile.am
new file mode 100644
index 000000000..63c91dfab
--- /dev/null
+++ b/src/libcharon/plugins/duplicheck/Makefile.am
@@ -0,0 +1,21 @@
+
+INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \
+	-I$(top_srcdir)/src/libcharon
+
+AM_CFLAGS = -rdynamic \
+	-DIPSEC_PIDDIR=\"${piddir}\"
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-duplicheck.la
+else
+plugin_LTLIBRARIES = libstrongswan-duplicheck.la
+endif
+
+libstrongswan_duplicheck_la_SOURCES = duplicheck_plugin.h duplicheck_plugin.c \
+	duplicheck_listener.h duplicheck_listener.c \
+	duplicheck_notify.h duplicheck_notify.c
+
+libstrongswan_duplicheck_la_LDFLAGS = -module -avoid-version
+
+ipsec_PROGRAMS = duplicheck
+duplicheck_SOURCES = duplicheck.c
diff --git a/src/libcharon/plugins/duplicheck/Makefile.in b/src/libcharon/plugins/duplicheck/Makefile.in
new file mode 100644
index 000000000..8cffa2f10
--- /dev/null
+++ b/src/libcharon/plugins/duplicheck/Makefile.in
@@ -0,0 +1,668 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  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
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+ipsec_PROGRAMS = duplicheck$(EXEEXT)
+subdir = src/libcharon/plugins/duplicheck
+DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/m4/config/libtool.m4 \
+	$(top_srcdir)/m4/config/ltoptions.m4 \
+	$(top_srcdir)/m4/config/ltsugar.m4 \
+	$(top_srcdir)/m4/config/ltversion.m4 \
+	$(top_srcdir)/m4/config/lt~obsolete.m4 \
+	$(top_srcdir)/m4/macros/with.m4 \
+	$(top_srcdir)/m4/macros/enable-disable.m4 \
+	$(top_srcdir)/m4/macros/add-plugin.m4 \
+	$(top_srcdir)/configure.in
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
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+    *) f=$$p;; \
+  esac;
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+am__install_max = 40
+am__nobase_strip_setup = \
+  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
+am__nobase_strip = \
+  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
+am__nobase_list = $(am__nobase_strip_setup); \
+  for p in $$list; do echo "$$p $$p"; done | \
+  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
+  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+    if (++n[$$2] == $(am__install_max)) \
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+  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
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+am__installdirs = "$(DESTDIR)$(plugindir)" "$(DESTDIR)$(ipsecdir)"
+LTLIBRARIES = $(noinst_LTLIBRARIES) $(plugin_LTLIBRARIES)
+libstrongswan_duplicheck_la_LIBADD =
+am_libstrongswan_duplicheck_la_OBJECTS = duplicheck_plugin.lo \
+	duplicheck_listener.lo duplicheck_notify.lo
+libstrongswan_duplicheck_la_OBJECTS =  \
+	$(am_libstrongswan_duplicheck_la_OBJECTS)
+libstrongswan_duplicheck_la_LINK = $(LIBTOOL) --tag=CC \
+	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
+	$(AM_CFLAGS) $(CFLAGS) $(libstrongswan_duplicheck_la_LDFLAGS) \
+	$(LDFLAGS) -o $@
+@MONOLITHIC_FALSE@am_libstrongswan_duplicheck_la_rpath = -rpath \
+@MONOLITHIC_FALSE@	$(plugindir)
+@MONOLITHIC_TRUE@am_libstrongswan_duplicheck_la_rpath =
+PROGRAMS = $(ipsec_PROGRAMS)
+am_duplicheck_OBJECTS = duplicheck.$(OBJEXT)
+duplicheck_OBJECTS = $(am_duplicheck_OBJECTS)
+duplicheck_LDADD = $(LDADD)
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+am__depfiles_maybe = depfiles
+am__mv = mv -f
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+	--mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+	$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+CCLD = $(CC)
+LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+	--mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \
+	$(LDFLAGS) -o $@
+SOURCES = $(libstrongswan_duplicheck_la_SOURCES) $(duplicheck_SOURCES)
+DIST_SOURCES = $(libstrongswan_duplicheck_la_SOURCES) \
+	$(duplicheck_SOURCES)
+ETAGS = etags
+CTAGS = ctags
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ACLOCAL = @ACLOCAL@
+ALLOCA = @ALLOCA@
+AMTAR = @AMTAR@
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+CYGPATH_W = @CYGPATH_W@
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+DEPDIR = @DEPDIR@
+DLLIB = @DLLIB@
+DSYMUTIL = @DSYMUTIL@
+DUMPBIN = @DUMPBIN@
+ECHO_C = @ECHO_C@
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+ECHO_T = @ECHO_T@
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+EXEEXT = @EXEEXT@
+FGREP = @FGREP@
+GPERF = @GPERF@
+GREP = @GREP@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+LD = @LD@
+LDFLAGS = @LDFLAGS@
+LEX = @LEX@
+LEXLIB = @LEXLIB@
+LEX_OUTPUT_ROOT = @LEX_OUTPUT_ROOT@
+LIBOBJS = @LIBOBJS@
+LIBS = @LIBS@
+LIBTOOL = @LIBTOOL@
+LIPO = @LIPO@
+LN_S = @LN_S@
+LTLIBOBJS = @LTLIBOBJS@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+MYSQLCFLAG = @MYSQLCFLAG@
+MYSQLCONFIG = @MYSQLCONFIG@
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+RTLIB = @RTLIB@
+RUBY = @RUBY@
+RUBYINCLUDE = @RUBYINCLUDE@
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+SHELL = @SHELL@
+SOCKLIB = @SOCKLIB@
+STRIP = @STRIP@
+VERSION = @VERSION@
+YACC = @YACC@
+YFLAGS = @YFLAGS@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
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+dbusservicedir = @dbusservicedir@
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+docdir = @docdir@
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+gtk_CFLAGS = @gtk_CFLAGS@
+gtk_LIBS = @gtk_LIBS@
+h_plugins = @h_plugins@
+host = @host@
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+libcharon_plugins = @libcharon_plugins@
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+maemo_CFLAGS = @maemo_CFLAGS@
+maemo_LIBS = @maemo_LIBS@
+manager_plugins = @manager_plugins@
+mandir = @mandir@
+medsrv_plugins = @medsrv_plugins@
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+pcsclite_CFLAGS = @pcsclite_CFLAGS@
+pcsclite_LIBS = @pcsclite_LIBS@
+pdfdir = @pdfdir@
+piddir = @piddir@
+pki_plugins = @pki_plugins@
+plugindir = @plugindir@
+pluto_plugins = @pluto_plugins@
+pool_plugins = @pool_plugins@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+random_device = @random_device@
+resolv_conf = @resolv_conf@
+routing_table = @routing_table@
+routing_table_prio = @routing_table_prio@
+s_plugins = @s_plugins@
+sbindir = @sbindir@
+scepclient_plugins = @scepclient_plugins@
+scripts_plugins = @scripts_plugins@
+sharedstatedir = @sharedstatedir@
+soup_CFLAGS = @soup_CFLAGS@
+soup_LIBS = @soup_LIBS@
+srcdir = @srcdir@
+strongswan_conf = @strongswan_conf@
+sysconfdir = @sysconfdir@
+systemdsystemunitdir = @systemdsystemunitdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+urandom_device = @urandom_device@
+xml_CFLAGS = @xml_CFLAGS@
+xml_LIBS = @xml_LIBS@
+INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \
+	-I$(top_srcdir)/src/libcharon
+
+AM_CFLAGS = -rdynamic \
+	-DIPSEC_PIDDIR=\"${piddir}\"
+
+@MONOLITHIC_TRUE@noinst_LTLIBRARIES = libstrongswan-duplicheck.la
+@MONOLITHIC_FALSE@plugin_LTLIBRARIES = libstrongswan-duplicheck.la
+libstrongswan_duplicheck_la_SOURCES = duplicheck_plugin.h duplicheck_plugin.c \
+	duplicheck_listener.h duplicheck_listener.c \
+	duplicheck_notify.h duplicheck_notify.c
+
+libstrongswan_duplicheck_la_LDFLAGS = -module -avoid-version
+duplicheck_SOURCES = duplicheck.c
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .o .obj
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu src/libcharon/plugins/duplicheck/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu src/libcharon/plugins/duplicheck/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure:  $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-noinstLTLIBRARIES:
+	-test -z "$(noinst_LTLIBRARIES)" || rm -f $(noinst_LTLIBRARIES)
+	@list='$(noinst_LTLIBRARIES)'; for p in $$list; do \
+	  dir="`echo $$p | sed -e 's|/[^/]*$$||'`"; \
+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
+install-pluginLTLIBRARIES: $(plugin_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	test -z "$(plugindir)" || $(MKDIR_P) "$(DESTDIR)$(plugindir)"
+	@list='$(plugin_LTLIBRARIES)'; test -n "$(plugindir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(plugindir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(plugindir)"; \
+	}
+
+uninstall-pluginLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(plugin_LTLIBRARIES)'; test -n "$(plugindir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(plugindir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(plugindir)/$$f"; \
+	done
+
+clean-pluginLTLIBRARIES:
+	-test -z "$(plugin_LTLIBRARIES)" || rm -f $(plugin_LTLIBRARIES)
+	@list='$(plugin_LTLIBRARIES)'; for p in $$list; do \
+	  dir="`echo $$p | sed -e 's|/[^/]*$$||'`"; \
+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
+libstrongswan-duplicheck.la: $(libstrongswan_duplicheck_la_OBJECTS) $(libstrongswan_duplicheck_la_DEPENDENCIES) 
+	$(libstrongswan_duplicheck_la_LINK) $(am_libstrongswan_duplicheck_la_rpath) $(libstrongswan_duplicheck_la_OBJECTS) $(libstrongswan_duplicheck_la_LIBADD) $(LIBS)
+install-ipsecPROGRAMS: $(ipsec_PROGRAMS)
+	@$(NORMAL_INSTALL)
+	test -z "$(ipsecdir)" || $(MKDIR_P) "$(DESTDIR)$(ipsecdir)"
+	@list='$(ipsec_PROGRAMS)'; test -n "$(ipsecdir)" || list=; \
+	for p in $$list; do echo "$$p $$p"; done | \
+	sed 's/$(EXEEXT)$$//' | \
+	while read p p1; do if test -f $$p || test -f $$p1; \
+	  then echo "$$p"; echo "$$p"; else :; fi; \
+	done | \
+	sed -e 'p;s,.*/,,;n;h' -e 's|.*|.|' \
+	    -e 'p;x;s,.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/' | \
+	sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1 } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) files[d] = files[d] " " $$1; \
+	    else { print "f", $$3 "/" $$4, $$1; } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	    if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	    test -z "$$files" || { \
+	    echo " $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files '$(DESTDIR)$(ipsecdir)$$dir'"; \
+	    $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files "$(DESTDIR)$(ipsecdir)$$dir" || exit $$?; \
+	    } \
+	; done
+
+uninstall-ipsecPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(ipsec_PROGRAMS)'; test -n "$(ipsecdir)" || list=; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	  sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+	      -e 's/$$/$(EXEEXT)/' `; \
+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(ipsecdir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(ipsecdir)" && rm -f $$files
+
+clean-ipsecPROGRAMS:
+	@list='$(ipsec_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+duplicheck$(EXEEXT): $(duplicheck_OBJECTS) $(duplicheck_DEPENDENCIES) 
+	@rm -f duplicheck$(EXEEXT)
+	$(LINK) $(duplicheck_OBJECTS) $(duplicheck_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/duplicheck.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/duplicheck_listener.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/duplicheck_notify.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/duplicheck_plugin.Plo@am__quote@
+
+.c.o:
+@am__fastdepCC_TRUE@	$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(COMPILE) -c $<
+
+.c.obj:
+@am__fastdepCC_TRUE@	$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ `$(CYGPATH_W) '$<'`
+@am__fastdepCC_TRUE@	$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(COMPILE) -c `$(CYGPATH_W) '$<'`
+
+.c.lo:
+@am__fastdepCC_TRUE@	$(LTCOMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$<' object='$@' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(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)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES) $(PROGRAMS)
+installdirs:
+	for dir in "$(DESTDIR)$(plugindir)" "$(DESTDIR)$(ipsecdir)"; do \
+	  test -z "$$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:
+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-ipsecPROGRAMS clean-libtool \
+	clean-noinstLTLIBRARIES clean-pluginLTLIBRARIES mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(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-ipsecPROGRAMS install-pluginLTLIBRARIES
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+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
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-ipsecPROGRAMS uninstall-pluginLTLIBRARIES
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+	clean-ipsecPROGRAMS 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-ipsecPROGRAMS 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-ipsecPROGRAMS \
+	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/duplicheck/duplicheck.c b/src/libcharon/plugins/duplicheck/duplicheck.c
new file mode 100644
index 000000000..99731a22b
--- /dev/null
+++ b/src/libcharon/plugins/duplicheck/duplicheck.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 revosec AG
+ *
+ * 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 <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <errno.h>
+
+#define DUPLICHECK_SOCKET IPSEC_PIDDIR "/charon.dck"
+
+int main(int argc, char *argv[])
+{
+	struct sockaddr_un addr;
+	char buf[128];
+	int fd, len;
+
+	addr.sun_family = AF_UNIX;
+	strcpy(addr.sun_path, DUPLICHECK_SOCKET);
+
+	fd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
+	if (fd < 0)
+	{
+		fprintf(stderr, "opening socket failed: %s\n", strerror(errno));
+		return 1;
+	}
+	if (connect(fd, (struct sockaddr *)&addr,
+			offsetof(struct sockaddr_un, sun_path) + strlen(addr.sun_path)) < 0)
+	{
+		fprintf(stderr, "connecting to %s failed: %s\n",
+				DUPLICHECK_SOCKET, strerror(errno));
+		close(fd);
+		return 1;
+	}
+	while (1)
+	{
+		len = recv(fd, &buf, sizeof(buf) - 1, 0);
+		if (len < 0)
+		{
+			fprintf(stderr, "reading from socket failed: %s\n", strerror(errno));
+			close(fd);
+			return 1;
+		}
+		printf("%.*s\n", len, buf);
+	}
+}
diff --git a/src/libcharon/plugins/duplicheck/duplicheck_listener.c b/src/libcharon/plugins/duplicheck/duplicheck_listener.c
new file mode 100644
index 000000000..226b2bd4e
--- /dev/null
+++ b/src/libcharon/plugins/duplicheck/duplicheck_listener.c
@@ -0,0 +1,262 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 revosec AG
+ *
+ * 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 "duplicheck_listener.h"
+
+#include <daemon.h>
+#include <threading/mutex.h>
+#include <utils/hashtable.h>
+#include <encoding/payloads/delete_payload.h>
+#include <processing/jobs/delete_ike_sa_job.h>
+
+typedef struct private_duplicheck_listener_t private_duplicheck_listener_t;
+
+/**
+ * Private data of an duplicheck_listener_t object.
+ */
+struct private_duplicheck_listener_t {
+
+	/**
+	 * Public duplicheck_listener_t interface.
+	 */
+	duplicheck_listener_t public;
+
+	/**
+	 * Socket to send notifications to
+	 */
+	duplicheck_notify_t *notify;
+
+	/**
+	 * Mutex to lock hashtables
+	 */
+	mutex_t *mutex;
+
+	/**
+	 * Hashtable of active IKE_SAs, identification_t => entry_t
+	 */
+	hashtable_t *active;
+
+	/**
+	 * Hashtable with active liveness checks, identification_t => entry_t
+	 */
+	hashtable_t *checking;
+};
+
+/**
+ * Entry for hashtables
+ */
+typedef struct {
+	/** peer identity */
+	identification_t *id;
+	/** IKE_SA identifier */
+	ike_sa_id_t *sa;
+} entry_t;
+
+/**
+ * Destroy a hashtable entry
+ */
+static void entry_destroy(entry_t *this)
+{
+	this->id->destroy(this->id);
+	this->sa->destroy(this->sa);
+	free(this);
+}
+
+/**
+ * Hashtable hash function
+ */
+static u_int hash(identification_t *key)
+{
+	return chunk_hash(key->get_encoding(key));
+}
+
+/**
+ * Hashtable equals function
+ */
+static bool equals(identification_t *a, identification_t *b)
+{
+	return a->equals(a, b);
+}
+
+METHOD(listener_t, ike_rekey, bool,
+	private_duplicheck_listener_t *this, ike_sa_t *old, ike_sa_t *new)
+{
+	identification_t *id;
+	ike_sa_id_t *sa;
+	entry_t *entry;
+
+	sa = new->get_id(new);
+	id = new->get_other_id(new);
+
+	INIT(entry,
+		.id = id->clone(id),
+		.sa = sa->clone(sa),
+	);
+	this->mutex->lock(this->mutex);
+	entry = this->active->put(this->active, entry->id, entry);
+	this->mutex->unlock(this->mutex);
+	if (entry)
+	{
+		entry_destroy(entry);
+	}
+	return TRUE;
+}
+
+METHOD(listener_t, ike_updown, bool,
+	private_duplicheck_listener_t *this, ike_sa_t *ike_sa, bool up)
+{
+	identification_t *id;
+	ike_sa_id_t *sa;
+	entry_t *entry;
+	job_t *job;
+
+	sa = ike_sa->get_id(ike_sa);
+	id = ike_sa->get_other_id(ike_sa);
+
+	if (up)
+	{
+		INIT(entry,
+			.id = id->clone(id),
+			.sa = sa->clone(sa),
+		);
+		this->mutex->lock(this->mutex);
+		entry = this->active->put(this->active, entry->id, entry);
+		this->mutex->unlock(this->mutex);
+		if (entry)
+		{
+			DBG1(DBG_CFG, "detected duplicate IKE_SA for '%Y', "
+				 "triggering delete for old IKE_SA", id);
+			job = (job_t*)delete_ike_sa_job_create(entry->sa, TRUE);
+			this->mutex->lock(this->mutex);
+			entry = this->checking->put(this->checking, entry->id, entry);
+			this->mutex->unlock(this->mutex);
+			lib->processor->queue_job(lib->processor, job);
+			if (entry)
+			{
+				entry_destroy(entry);
+			}
+		}
+	}
+	else
+	{
+		this->mutex->lock(this->mutex);
+		entry = this->checking->remove(this->checking, id);
+		this->mutex->unlock(this->mutex);
+		if (entry)
+		{
+			DBG1(DBG_CFG, "delete for duplicate IKE_SA '%Y' timed out, "
+				 "keeping new IKE_SA", id);
+			entry_destroy(entry);
+		}
+		else
+		{
+			this->mutex->lock(this->mutex);
+			entry = this->active->remove(this->active, id);
+			this->mutex->unlock(this->mutex);
+			if (entry)
+			{
+				entry_destroy(entry);
+			}
+		}
+	}
+	return TRUE;
+}
+
+METHOD(listener_t, message_hook, bool,
+	private_duplicheck_listener_t *this, ike_sa_t *ike_sa,
+	message_t *message, bool incoming)
+{
+	if (incoming && !message->get_request(message))
+	{
+		identification_t *id;
+		entry_t *entry;
+
+		id = ike_sa->get_other_id(ike_sa);
+		this->mutex->lock(this->mutex);
+		entry = this->checking->remove(this->checking, id);
+		this->mutex->unlock(this->mutex);
+		if (entry)
+		{
+			DBG1(DBG_CFG, "got a response on a duplicate IKE_SA for '%Y', "
+				 "deleting new IKE_SA", id);
+			entry_destroy(entry);
+			this->mutex->lock(this->mutex);
+			entry = this->active->remove(this->active, id);
+			this->mutex->unlock(this->mutex);
+			if (entry)
+			{
+				lib->processor->queue_job(lib->processor,
+						(job_t*)delete_ike_sa_job_create(entry->sa, TRUE));
+				entry_destroy(entry);
+			}
+			this->notify->send(this->notify, id);
+		}
+	}
+	return TRUE;
+}
+
+METHOD(duplicheck_listener_t, destroy, void,
+	private_duplicheck_listener_t *this)
+{
+	enumerator_t *enumerator;
+	identification_t *key;
+	entry_t *value;
+
+	enumerator = this->active->create_enumerator(this->active);
+	while (enumerator->enumerate(enumerator, &key, &value))
+	{
+		entry_destroy(value);
+	}
+	enumerator->destroy(enumerator);
+
+	enumerator = this->checking->create_enumerator(this->checking);
+	while (enumerator->enumerate(enumerator, &key, &value))
+	{
+		entry_destroy(value);
+	}
+	enumerator->destroy(enumerator);
+
+	this->active->destroy(this->active);
+	this->checking->destroy(this->checking);
+	this->mutex->destroy(this->mutex);
+	free(this);
+}
+
+/**
+ * See header
+ */
+duplicheck_listener_t *duplicheck_listener_create(duplicheck_notify_t *notify)
+{
+	private_duplicheck_listener_t *this;
+
+	INIT(this,
+		.public = {
+			.listener = {
+				.ike_rekey = _ike_rekey,
+				.ike_updown = _ike_updown,
+				.message = _message_hook,
+			},
+			.destroy = _destroy,
+		},
+		.notify = notify,
+		.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
+		.active = hashtable_create((hashtable_hash_t)hash,
+								   (hashtable_equals_t)equals, 32),
+		.checking = hashtable_create((hashtable_hash_t)hash,
+									 (hashtable_equals_t)equals, 2),
+	);
+
+	return &this->public;
+}
diff --git a/src/libcharon/plugins/duplicheck/duplicheck_listener.h b/src/libcharon/plugins/duplicheck/duplicheck_listener.h
new file mode 100644
index 000000000..7c575dd64
--- /dev/null
+++ b/src/libcharon/plugins/duplicheck/duplicheck_listener.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 revosec AG
+ *
+ * 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 duplicheck_listener duplicheck_listener
+ * @{ @ingroup duplicheck
+ */
+
+#ifndef DUPLICHECK_LISTENER_H_
+#define DUPLICHECK_LISTENER_H_
+
+#include "duplicheck_notify.h"
+
+#include <bus/listeners/listener.h>
+
+typedef struct duplicheck_listener_t duplicheck_listener_t;
+
+/**
+ * Listener checking for duplicates.
+ */
+struct duplicheck_listener_t {
+
+	/**
+	 * Implements listener_t interface.
+	 */
+	listener_t listener;
+
+	/**
+	 * Destroy a duplicheck_listener_t.
+	 */
+	void (*destroy)(duplicheck_listener_t *this);
+};
+
+/**
+ * Create a duplicheck_listener instance.
+ *
+ * @param notify		socket to send notifications to
+ * @return				listener
+ */
+duplicheck_listener_t *duplicheck_listener_create(duplicheck_notify_t *notify);
+
+#endif /** DUPLICHECK_LISTENER_H_ @}*/
diff --git a/src/libcharon/plugins/duplicheck/duplicheck_notify.c b/src/libcharon/plugins/duplicheck/duplicheck_notify.c
new file mode 100644
index 000000000..4e7618235
--- /dev/null
+++ b/src/libcharon/plugins/duplicheck/duplicheck_notify.c
@@ -0,0 +1,211 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 revosec AG
+ *
+ * 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 "duplicheck_notify.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <daemon.h>
+#include <threading/mutex.h>
+#include <threading/thread.h>
+#include <utils/linked_list.h>
+#include <processing/jobs/callback_job.h>
+
+#define DUPLICHECK_SOCKET IPSEC_PIDDIR "/charon.dck"
+
+typedef struct private_duplicheck_notify_t private_duplicheck_notify_t;
+
+/**
+ * Private data of an duplicheck_notify_t object.
+ */
+struct private_duplicheck_notify_t {
+
+	/**
+	 * Public duplicheck_notify_t interface.
+	 */
+	duplicheck_notify_t public;
+
+	/**
+	 * Callback job dispatching connections
+	 */
+	callback_job_t *job;
+
+	/**
+	 * Mutex to lock list
+	 */
+	mutex_t *mutex;
+
+	/**
+	 * List of connected sockets
+	 */
+	linked_list_t *connected;
+
+	/**
+	 * Socket dispatching connections
+	 */
+	int socket;
+};
+
+/**
+ * Open duplicheck unix socket
+ */
+static bool open_socket(private_duplicheck_notify_t *this)
+{
+	struct sockaddr_un addr;
+	mode_t old;
+
+	addr.sun_family = AF_UNIX;
+	strcpy(addr.sun_path, DUPLICHECK_SOCKET);
+
+	this->socket = socket(AF_UNIX, SOCK_SEQPACKET, 0);
+	if (this->socket == -1)
+	{
+		DBG1(DBG_CFG, "creating duplicheck socket failed");
+		return FALSE;
+	}
+	unlink(addr.sun_path);
+	old = umask(~(S_IRWXU | S_IRWXG));
+	if (bind(this->socket, (struct sockaddr*)&addr, sizeof(addr)) < 0)
+	{
+		DBG1(DBG_CFG, "binding duplicheck socket failed: %s", strerror(errno));
+		close(this->socket);
+		return FALSE;
+	}
+	umask(old);
+	if (chown(addr.sun_path, charon->uid, charon->gid) != 0)
+	{
+		DBG1(DBG_CFG, "changing duplicheck socket permissions failed: %s",
+			 strerror(errno));
+	}
+	if (listen(this->socket, 3) < 0)
+	{
+		DBG1(DBG_CFG, "listening on duplicheck socket failed: %s",
+			 strerror(errno));
+		close(this->socket);
+		unlink(addr.sun_path);
+		return FALSE;
+	}
+	return TRUE;
+}
+
+/**
+ * Accept duplicheck notification connections
+ */
+static job_requeue_t receive(private_duplicheck_notify_t *this)
+{
+	struct sockaddr_un addr;
+	int len = sizeof(addr);
+	uintptr_t fd;
+	bool oldstate;
+
+	oldstate = thread_cancelability(TRUE);
+	fd = accept(this->socket, (struct sockaddr*)&addr, &len);
+	thread_cancelability(oldstate);
+
+	if (fd != -1)
+	{
+		this->mutex->lock(this->mutex);
+		this->connected->insert_last(this->connected, (void*)fd);
+		this->mutex->unlock(this->mutex);
+	 }
+	 else
+	 {
+		 DBG1(DBG_CFG, "accepting duplicheck connection failed: %s",
+			  strerror(errno));
+	 }
+	 return JOB_REQUEUE_FAIR;
+}
+
+METHOD(duplicheck_notify_t, send_, void,
+	private_duplicheck_notify_t *this, identification_t *id)
+{
+	char buf[128];
+	enumerator_t *enumerator;
+	uintptr_t fd;
+	int len;
+
+	len = snprintf(buf, sizeof(buf), "%Y", id);
+	if (len > 0 && len < sizeof(buf))
+	{
+		this->mutex->lock(this->mutex);
+		enumerator = this->connected->create_enumerator(this->connected);
+		while (enumerator->enumerate(enumerator, &fd))
+		{
+			if (send(fd, &buf, len + 1, 0) != len + 1)
+			{
+				DBG1(DBG_CFG, "sending duplicheck notify failed: %s",
+					 strerror(errno));
+				this->connected->remove_at(this->connected, enumerator);
+				close(fd);
+			}
+		}
+		enumerator->destroy(enumerator);
+		this->mutex->unlock(this->mutex);
+	}
+}
+
+METHOD(duplicheck_notify_t, destroy, void,
+	private_duplicheck_notify_t *this)
+{
+	enumerator_t *enumerator;
+	uintptr_t fd;
+
+	if (this->job)
+	{
+		this->job->cancel(this->job);
+	}
+	enumerator = this->connected->create_enumerator(this->connected);
+	while (enumerator->enumerate(enumerator, &fd))
+	{
+		close(fd);
+	}
+	enumerator->destroy(enumerator);
+	this->connected->destroy(this->connected);
+	this->mutex->destroy(this->mutex);
+	free(this);
+}
+
+/**
+ * See header
+ */
+duplicheck_notify_t *duplicheck_notify_create()
+{
+	private_duplicheck_notify_t *this;
+
+	INIT(this,
+		.public = {
+			.send = _send_,
+			.destroy = _destroy,
+		},
+		.connected = linked_list_create(),
+		.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
+	);
+
+	if (!open_socket(this))
+	{
+		destroy(this);
+		return NULL;
+	}
+	this->job = callback_job_create((callback_job_cb_t)receive,
+									this, NULL, NULL);
+	lib->processor->queue_job(lib->processor, (job_t*)this->job);
+
+	return &this->public;
+}
diff --git a/src/libcharon/plugins/duplicheck/duplicheck_notify.h b/src/libcharon/plugins/duplicheck/duplicheck_notify.h
new file mode 100644
index 000000000..43dd20cca
--- /dev/null
+++ b/src/libcharon/plugins/duplicheck/duplicheck_notify.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 revosec AG
+ *
+ * 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 duplicheck_notify duplicheck_notify
+ * @{ @ingroup duplicheck
+ */
+
+#ifndef DUPLICHECK_NOTIFY_H_
+#define DUPLICHECK_NOTIFY_H_
+
+#include <utils/identification.h>
+
+typedef struct duplicheck_notify_t duplicheck_notify_t;
+
+/**
+ * Sends notifications over a unix socket when duplicates are detected.
+ */
+struct duplicheck_notify_t {
+
+	/**
+	 * Send a notification message if duplicate IKE_SA detected.
+	 *
+	 * @param id		identity a duplicate tunnel has been detected
+	 */
+	void (*send)(duplicheck_notify_t *this, identification_t *id);
+
+	/**
+	 * Destroy a duplicheck_notify_t.
+	 */
+	void (*destroy)(duplicheck_notify_t *this);
+};
+
+/**
+ * Create a duplicheck_notify instance.
+ */
+duplicheck_notify_t *duplicheck_notify_create();
+
+#endif /** DUPLICHECK_NOTIFY_H_ @}*/
diff --git a/src/libcharon/plugins/duplicheck/duplicheck_plugin.c b/src/libcharon/plugins/duplicheck/duplicheck_plugin.c
new file mode 100644
index 000000000..5bc1a14af
--- /dev/null
+++ b/src/libcharon/plugins/duplicheck/duplicheck_plugin.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 revosec AG
+ *
+ * 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 "duplicheck_plugin.h"
+
+#include "duplicheck_notify.h"
+#include "duplicheck_listener.h"
+
+#include <daemon.h>
+
+typedef struct private_duplicheck_plugin_t private_duplicheck_plugin_t;
+
+/**
+ * Private data of duplicheck plugin
+ */
+struct private_duplicheck_plugin_t {
+
+	/**
+	 * Implements plugin interface
+	 */
+	duplicheck_plugin_t public;
+
+	/**
+	 * Listener doing duplicate checks
+	 */
+	duplicheck_listener_t *listener;
+
+	/**
+	 * Notification sender facility
+	 */
+	duplicheck_notify_t *notify;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_duplicheck_plugin_t *this)
+{
+	return "duplicheck";
+}
+
+METHOD(plugin_t, destroy, void,
+	private_duplicheck_plugin_t *this)
+{
+	charon->bus->remove_listener(charon->bus, &this->listener->listener);
+	this->notify->destroy(this->notify);
+	this->listener->destroy(this->listener);
+	free(this);
+}
+
+/**
+ * Plugin constructor
+ */
+plugin_t *duplicheck_plugin_create()
+{
+	private_duplicheck_plugin_t *this;
+
+	if (!lib->settings->get_bool(lib->settings,
+								 "charon.plugins.duplicheck.enabled", TRUE))
+	{
+		return NULL;
+	}
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.reload = (void*)return_false,
+				.destroy = _destroy,
+			},
+		},
+		.notify = duplicheck_notify_create(),
+	);
+
+	if (!this->notify)
+	{
+		free(this);
+		return NULL;
+	}
+	this->listener = duplicheck_listener_create(this->notify);
+	charon->bus->add_listener(charon->bus, &this->listener->listener);
+
+	return &this->public.plugin;
+}
diff --git a/src/libcharon/plugins/duplicheck/duplicheck_plugin.h b/src/libcharon/plugins/duplicheck/duplicheck_plugin.h
new file mode 100644
index 000000000..3dddf1494
--- /dev/null
+++ b/src/libcharon/plugins/duplicheck/duplicheck_plugin.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 revosec AG
+ *
+ * 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 duplicheck duplicheck
+ * @ingroup cplugins
+ *
+ * @defgroup duplicheck_plugin duplicheck_plugin
+ * @{ @ingroup duplicheck
+ */
+
+#ifndef DUPLICHECK_PLUGIN_H_
+#define DUPLICHECK_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct duplicheck_plugin_t duplicheck_plugin_t;
+
+/**
+ * Advanced duplicate checking using liveness checks.
+ */
+struct duplicheck_plugin_t {
+
+	/**
+	 * Implements plugin interface
+	 */
+	plugin_t plugin;
+};
+
+#endif /** DUPLICHECK_PLUGIN_H_ @}*/