p-cscf: Add plugin stub

configure.ac

@@ -228,6 +228,7 @@ ARG_DISBL_SET([attr],           [disable strongswan.conf based configuration att
 ARG_ENABL_SET([attr-sql],       [enable SQL based configuration attribute plugin.])
 ARG_ENABL_SET([dhcp],           [enable DHCP based attribute provider plugin.])
 ARG_ENABL_SET([osx-attr],       [enable OS X SystemConfiguration attribute handler.])
+ARG_ENABL_SET([p-cscf],         [enable plugin to request P-CSCF server addresses from an ePDG.])
 ARG_DISBL_SET([resolve],        [disable resolve DNS handler plugin.])
 ARG_ENABL_SET([unity],          [enables Cisco Unity extension plugin.])
 # TNC modules/plugins
@@ -1396,6 +1397,7 @@ ADD_PLUGIN([medsrv],               [c charon])
 ADD_PLUGIN([medcli],               [c charon])
 ADD_PLUGIN([dhcp],                 [c charon])
 ADD_PLUGIN([osx-attr],             [c charon cmd])
+ADD_PLUGIN([p-cscf],               [c charon cmd])
 ADD_PLUGIN([android-dns],          [c charon])
 ADD_PLUGIN([android-log],          [c charon])
 ADD_PLUGIN([ha],                   [c charon])
@@ -1500,6 +1502,7 @@ AM_CONDITIONAL(USE_MEDSRV, test x$medsrv = xtrue)
 AM_CONDITIONAL(USE_MEDCLI, test x$medcli = xtrue)
 AM_CONDITIONAL(USE_UCI, test x$uci = xtrue)
 AM_CONDITIONAL(USE_OSX_ATTR, test x$osx_attr = xtrue)
+AM_CONDITIONAL(USE_P_CSCF, test x$p_cscf = xtrue)
 AM_CONDITIONAL(USE_ANDROID_DNS, test x$android_dns = xtrue)
 AM_CONDITIONAL(USE_ANDROID_LOG, test x$android_log = xtrue)
 AM_CONDITIONAL(USE_MAEMO, test x$maemo = xtrue)
@@ -1839,6 +1842,7 @@ AC_CONFIG_FILES([
 	src/libcharon/plugins/coupling/Makefile
 	src/libcharon/plugins/radattr/Makefile
 	src/libcharon/plugins/osx_attr/Makefile
+	src/libcharon/plugins/p_cscf/Makefile
 	src/libcharon/plugins/android_dns/Makefile
 	src/libcharon/plugins/android_log/Makefile
 	src/libcharon/plugins/maemo/Makefile

src/libcharon/Android.mk

@@ -156,6 +156,8 @@ endif
 
 LOCAL_SRC_FILES += $(call add_plugin, attr)
 
+LOCAL_SRC_FILES += $(call add_plugin, p-cscf)
+
 LOCAL_SRC_FILES += $(call add_plugin, eap-aka)
 
 LOCAL_SRC_FILES += $(call add_plugin, eap-aka-3gpp2)

src/libcharon/Makefile.am

@@ -489,6 +489,13 @@ if MONOLITHIC
 endif
 endif
 
+if USE_P_CSCF
+  SUBDIRS += plugins/p_cscf
+if MONOLITHIC
+  libcharon_la_LIBADD += plugins/p_cscf/libstrongswan-p-cscf.la
+endif
+endif
+
 if USE_ANDROID_DNS
   SUBDIRS += plugins/android_dns
 if MONOLITHIC

src/libcharon/plugins/p_cscf/Makefile.am

@@ -0,0 +1,18 @@
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/libstrongswan \
+	-I$(top_srcdir)/src/libhydra \
+	-I$(top_srcdir)/src/libcharon
+
+AM_CFLAGS = \
+	$(PLUGIN_CFLAGS)
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-p-cscf.la
+else
+plugin_LTLIBRARIES = libstrongswan-p-cscf.la
+endif
+
+libstrongswan_p_cscf_la_SOURCES = \
+	p_cscf_plugin.c p_cscf_plugin.h
+
+libstrongswan_p_cscf_la_LDFLAGS = -module -avoid-version

src/libcharon/plugins/p_cscf/p_cscf_plugin.c

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2016 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 "p_cscf_plugin.h"
+
+#include <daemon.h>
+
+typedef struct private_p_cscf_plugin_t private_p_cscf_plugin_t;
+
+/**
+ * Private data
+ */
+struct private_p_cscf_plugin_t {
+
+	/**
+	 * Public interface
+	 */
+	p_cscf_plugin_t public;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_p_cscf_plugin_t *this)
+{
+	return "p-cscf";
+}
+
+METHOD(plugin_t, destroy, void,
+	private_p_cscf_plugin_t *this)
+{
+	free(this);
+}
+
+/**
+ * See header
+ */
+plugin_t *p_cscf_plugin_create()
+{
+	private_p_cscf_plugin_t *this;
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.destroy = _destroy,
+			},
+		},
+	);
+
+	return &this->public.plugin;
+}

src/libcharon/plugins/p_cscf/p_cscf_plugin.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2016 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 p_cscf p_cscf
+ * @ingroup cplugins
+ *
+ * @defgroup p_cscf_plugin p_cscf_plugin
+ * @{ @ingroup p_cscf
+ */
+
+#ifndef P_CSCF_PLUGIN_H_
+#define P_CSCF_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct p_cscf_plugin_t p_cscf_plugin_t;
+
+/**
+ * Plugin that requests P-CSCF server addresses from an ePDG as specified
+ * in RFC 7651.
+ */
+struct p_cscf_plugin_t {
+
+	/**
+	 * Implements plugin interface.
+	 */
+	plugin_t plugin;
+};
+
+#endif /** P_CSCF_PLUGIN_H_ @}*/