1 files changed, 111 insertions, 0 deletions
diff --git a/src/libcharon/plugins/ha/ha_segments.h b/src/libcharon/plugins/ha/ha_segments.h
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+++ b/src/libcharon/plugins/ha/ha_segments.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2008 Martin Willi
+ * 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 ha_segments ha_segments
+ * @{ @ingroup ha
+ */
+
+#ifndef HA_SEGMENTS_H_
+#define HA_SEGMENTS_H_
+
+#include <daemon.h>
+
+typedef struct ha_segments_t ha_segments_t;
+
+typedef u_int16_t segment_mask_t;
+
+/**
+ * maximum number of segments
+ */
+#define SEGMENTS_MAX (sizeof(segment_mask_t)*8)
+
+/**
+ * Get the bit in the mask of a segment
+ */
+#define SEGMENTS_BIT(segment) (0x01 << (segment - 1))
+
+#include "ha_socket.h"
+#include "ha_tunnel.h"
+#include "ha_kernel.h"
+
+/**
+ * Segmentation of peers into active and passive.
+ */
+struct ha_segments_t {
+
+	/**
+	 * Implements listener interface to catch daemon shutdown.
+	 */
+	listener_t listener;
+
+	/**
+	 * Activate a set of IKE_SAs identified by a segment.
+	 *
+	 * @param segment	numerical segment to takeover, 0 for all
+	 * @param notify	wheter to notify other nodes about activation
+	 */
+	void (*activate)(ha_segments_t *this, u_int segment, bool notify);
+
+	/**
+	 * Deactivate a set of IKE_SAs identified by a segment.
+	 *
+	 * @param segment	numerical segment to takeover, 0 for all
+	 * @param notify	wheter to notify other nodes about deactivation
+	 */
+	void (*deactivate)(ha_segments_t *this, u_int segment, bool notify);
+
+	/**
+	 * Resync an active segment.
+	 *
+	 * To reintegrade a node into the cluster, resynchronization is reqired.
+	 * IKE_SAs and CHILD_SAs are synced automatically during rekeying. A call
+	 * to this method enforces a rekeying immediately sync all state of a
+	 * segment.
+	 *
+	 * @param segment	segment to resync
+	 */
+	void (*resync)(ha_segments_t *this, u_int segment);
+
+	/**
+	 * Handle a status message from the remote node.
+	 *
+	 * @param mask		segments the remote node is serving actively
+	 */
+	void (*handle_status)(ha_segments_t *this, segment_mask_t mask);
+
+	/**
+	 * Destroy a ha_segments_t.
+	 */
+	void (*destroy)(ha_segments_t *this);
+};
+
+/**
+ * Create a ha_segments instance.
+ *
+ * @param socket		socket to communicate segment (de-)activation
+ * @param kernel		interface to control segments at kernel level
+ * @param tunnel		HA tunnel
+ * @param count			number of segments the cluster uses
+ * @param node			node, currently 1 or 0
+ * @param monitor		should we use monitoring functionality
+ * @param resync		request a complete resync on startup
+ * @return				segment object
+ */
+ha_segments_t *ha_segments_create(ha_socket_t *socket, ha_kernel_t *kernel,
+								  ha_tunnel_t *tunnel, u_int count, u_int node,
+								  bool monitor, bool resync);
+
+#endif /* HA_SEGMENTS_ @}*/