Add a lookip plugin stub to lookup connections by virtual IP

configure.in

@@ -216,6 +216,7 @@ ARG_ENABL_SET([maemo],          [enable Maemo specific plugin.])
 ARG_ENABL_SET([nm],             [enable NetworkManager backend.])
 ARG_ENABL_SET([ha],             [enable high availability cluster plugin.])
 ARG_ENABL_SET([whitelist],      [enable peer identity whitelisting plugin.])
+ARG_ENABL_SET([lookip],         [enable fast virtual IP lookup and notification plugin.])
 ARG_ENABL_SET([certexpire],     [enable CSV export of expiration dates of used certificates.])
 ARG_ENABL_SET([led],            [enable plugin to control LEDs on IKEv2 activity using the Linux kernel LED subsystem.])
 ARG_ENABL_SET([duplicheck],     [advanced duplicate checking plugin using liveness checks.])
@@ -948,6 +949,7 @@ ADD_PLUGIN([android],              [c charon])
 ADD_PLUGIN([android-log],          [c charon])
 ADD_PLUGIN([ha],                   [c charon])
 ADD_PLUGIN([whitelist],            [c charon])
+ADD_PLUGIN([lookip],               [c charon])
 ADD_PLUGIN([certexpire],           [c charon])
 ADD_PLUGIN([led],                  [c charon])
 ADD_PLUGIN([duplicheck],           [c charon])
@@ -1038,6 +1040,7 @@ AM_CONDITIONAL(USE_UNIT_TESTS, test x$unit_tester = xtrue)
 AM_CONDITIONAL(USE_LOAD_TESTER, test x$load_tester = xtrue)
 AM_CONDITIONAL(USE_HA, test x$ha = xtrue)
 AM_CONDITIONAL(USE_WHITELIST, test x$whitelist = xtrue)
+AM_CONDITIONAL(USE_LOOKIP, test x$lookip = xtrue)
 AM_CONDITIONAL(USE_CERTEXPIRE, test x$certexpire = xtrue)
 AM_CONDITIONAL(USE_LED, test x$led = xtrue)
 AM_CONDITIONAL(USE_DUPLICHECK, test x$duplicheck = xtrue)
@@ -1270,6 +1273,7 @@ AC_OUTPUT(
 	src/libcharon/plugins/uci/Makefile
 	src/libcharon/plugins/ha/Makefile
 	src/libcharon/plugins/whitelist/Makefile
+	src/libcharon/plugins/lookip/Makefile
 	src/libcharon/plugins/certexpire/Makefile
 	src/libcharon/plugins/led/Makefile
 	src/libcharon/plugins/duplicheck/Makefile

src/libcharon/Makefile.am

@@ -484,6 +484,13 @@ if MONOLITHIC
 endif
 endif
 
+if USE_LOOKIP
+  SUBDIRS += plugins/lookip
+if MONOLITHIC
+  libcharon_la_LIBADD += plugins/lookip/libstrongswan-lookip.la
+endif
+endif
+
 if USE_CERTEXPIRE
   SUBDIRS += plugins/certexpire
 if MONOLITHIC

src/libcharon/plugins/lookip/Makefile.am

@@ -0,0 +1,13 @@
+
+INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \
+	-I$(top_srcdir)/src/libcharon
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-lookip.la
+else
+plugin_LTLIBRARIES = libstrongswan-lookip.la
+endif
+
+libstrongswan_lookip_la_SOURCES = lookip_plugin.h lookip_plugin.c
+
+libstrongswan_lookip_la_LDFLAGS = -module -avoid-version

src/libcharon/plugins/lookip/lookip_plugin.c

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2012 Martin Willi
+ * Copyright (C) 2012 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 "lookip_plugin.h"
+
+#include <daemon.h>
+
+typedef struct private_lookip_plugin_t private_lookip_plugin_t;
+
+/**
+ * private data of lookip plugin
+ */
+struct private_lookip_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	lookip_plugin_t public;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_lookip_plugin_t *this)
+{
+	return "lookip";
+}
+
+METHOD(plugin_t, destroy, void,
+	private_lookip_plugin_t *this)
+{
+	free(this);
+}
+
+/**
+ * Plugin constructor
+ */
+plugin_t *lookip_plugin_create()
+{
+	private_lookip_plugin_t *this;
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.reload = (void*)return_false,
+				.destroy = _destroy,
+			},
+		},
+	);
+
+	return &this->public.plugin;
+}

src/libcharon/plugins/lookip/lookip_plugin.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2012 Martin Willi
+ * Copyright (C) 2012 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 lookip lookip
+ * @ingroup cplugins
+ *
+ * @defgroup lookip_plugin lookip_plugin
+ * @{ @ingroup lookip
+ */
+
+#ifndef LOOKIP_PLUGIN_H_
+#define LOOKIP_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct lookip_plugin_t lookip_plugin_t;
+
+/**
+ * Plugin providing fast connection lookup and notification for virtual IPs.
+ */
+struct lookip_plugin_t {
+
+	/**
+	 * Implements plugin interface.
+	 */
+	plugin_t plugin;
+};
+
+#endif /** LOOKIP_PLUGIN_H_ @}*/