Merge branch 'android-ndk'

This branch comes with some preliminary changes for the user-land IPsec
implementation and the Android App.

One important change is that the UDP ports used by the socket-default plugin
were made configurable (either via ./configure or strongswan.conf).
Also, the plugin does randomly allocate a port if it is configured to 0,
which is useful for client implementations.  A consequence of these
changes is that the local UDP port used when creating ike_cfg_t objects has
to be fetched from the socket.

src/libstrongswan/Android.mk

@@ -58,7 +58,7 @@ LOCAL_SRC_FILES += $(call add_plugin, nonce)
 
 LOCAL_SRC_FILES += $(call add_plugin, openssl)
 ifneq ($(call plugin_enabled, openssl),)
-LOCAL_C_INCLUDES += external/openssl/include
+LOCAL_C_INCLUDES += $(openssl_PATH)
 LOCAL_SHARED_LIBRARIES += libcrypto
 endif
 

src/libstrongswan/debug.c

@@ -34,6 +34,7 @@ ENUM(debug_names, DBG_DMN, DBG_LIB,
 	"PTS",
 	"TLS",
 	"APP",
+	"ESP",
 	"LIB",
 );
 
@@ -54,6 +55,7 @@ ENUM(debug_lower_names, DBG_DMN, DBG_LIB,
 	"pts",
 	"tls",
 	"app",
+	"esp",
 	"lib",
 );
 

src/libstrongswan/debug.h

@@ -64,6 +64,8 @@ enum debug_t {
 	DBG_TLS,
 	/** applications other than daemons */
 	DBG_APP,
+	/** libipsec */
+	DBG_ESP,
 	/** libstrongswan */
 	DBG_LIB,
 	/** number of groups */

src/libstrongswan/plugins/plugin_loader.c

@@ -250,8 +250,11 @@ static bool load_plugin(private_plugin_loader_t *this, char *name, char *file,
 			this->plugins->insert_last(this->plugins, entry);
 			return TRUE;
 		case NOT_FOUND:
-			/* try to load the plugin from a file */
-			break;
+			if (file)
+			{	/* try to load the plugin from a file */
+				break;
+			}
+			/* fall-through */
 		default:
 			return FALSE;
 	}
@@ -651,16 +654,18 @@ METHOD(plugin_loader_t, load_plugins, bool,
 	char *token;
 	bool critical_failed = FALSE;
 
+#ifdef PLUGINDIR
 	if (path == NULL)
 	{
 		path = PLUGINDIR;
 	}
+#endif /* PLUGINDIR */
 
 	enumerator = enumerator_create_token(list, " ", " ");
 	while (!critical_failed && enumerator->enumerate(enumerator, &token))
 	{
 		bool critical = FALSE;
-		char file[PATH_MAX];
+		char buf[PATH_MAX], *file = NULL;
 		int len;
 
 		token = strdup(token);
@@ -675,10 +680,14 @@ METHOD(plugin_loader_t, load_plugins, bool,
 			free(token);
 			continue;
 		}
-		if (snprintf(file, sizeof(file), "%s/libstrongswan-%s.so",
-					 path, token) >= sizeof(file))
+		if (path)
 		{
-			return FALSE;
+			if (snprintf(buf, sizeof(buf), "%s/libstrongswan-%s.so",
+						 path, token) >= sizeof(buf))
+			{
+				return FALSE;
+			}
+			file = buf;
 		}
 		if (!load_plugin(this, token, file, critical) && critical)
 		{

src/libstrongswan/settings.c

@@ -1117,14 +1117,21 @@ static bool load_files_internal(private_settings_t *this, section_t *parent,
 								char *pattern, bool merge)
 {
 	char *text;
-	linked_list_t *contents = linked_list_create();
-	section_t *section = section_create(NULL);
+	linked_list_t *contents;
+	section_t *section;
 
 	if (pattern == NULL)
 	{
+#ifdef STRONGSWAN_CONF
 		pattern = STRONGSWAN_CONF;
+#else
+		return FALSE;
+#endif
 	}
 
+	contents = linked_list_create();
+	section = section_create(NULL);
+
 	if (!parse_files(contents, NULL, 0, pattern, section))
 	{
 		contents->destroy_function(contents, (void*)free);