+#define CLUSTER_MAX_SIZE 32 // No more than 32 machines in a cluster!
+
+#define DEFAULT_MCAST_ADDR "239.192.13.13" // Need an assigned number!
+#define DEFAULT_MCAST_INTERFACE "eth0"
+
+typedef struct {
+ uint32_t version; // protocol version.
+ uint32_t seq; // Sequence number for this heatbeat.
+ uint32_t basetime; // What time I started
+ uint32_t clusterid; // Id for this cluster?
+
+ uint32_t highsession; // Id of the highest in-use session.
+ uint32_t freesession; // Id of the first free session.
+ uint32_t highbundle; // Id of the highest used bundle.
+ uint32_t hightunnel; // Id of the highest used tunnel.
+ uint32_t size_sess; // Size of the session structure.
+
+ uint32_t size_bund; // size of the bundle structure.
+ uint32_t size_tunn; // size of the tunnel structure.
+ uint32_t interval; // ping/heartbeat interval
+ uint32_t timeout; // heartbeat timeout
+
+ uint64_t table_version; // # state changes processed by cluster
+
+ char reserved[128 - 13*sizeof(uint32_t) - sizeof(uint64_t)]; // Pad out to 128 bytes.
+} heartt;
+
+typedef struct { /* Used to update byte counters on the */
+ /* master. */
+ uint32_t sid;
+ uint32_t pin;
+ uint32_t pout;
+ uint32_t cin;
+ uint32_t cout;
+} bytest;
+
+typedef struct {
+ in_addr_t addr; // peer address
+ uint32_t ver; // version of structure.
+ uint32_t undef; // Number of undefined structures. 0 if up-to-date.
+ uint32_t basetime; // start time of this peer.
+} pingt;
+
+int cluster_init(void);
+int processcluster(uint8_t *buf, int size, in_addr_t addr);
+int cluster_listinvert_session(int sidnew, int sidtodel);
+int cluster_send_session(int sid);
+int cluster_send_bundle(int bid);
+int cluster_send_tunnel(int tid);
+int master_forward_packet(uint8_t *data, int size, in_addr_t addr, int port);
+int master_forward_dae_packet(uint8_t *data, int size, in_addr_t addr, int port);
+int master_throttle_packet(int tid, uint8_t *data, int size);
+int master_garden_packet(sessionidt s, uint8_t *data, int size);
+int master_forward_mppp_packet(sessionidt s, uint8_t *data, int size);
+void master_update_counts(void);
+void cluster_send_ping(time_t basetime);
+void cluster_heartbeat(void);
+void cluster_check_master(void);
+void cluster_check_slaves(void);
+int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc);
+
+#endif /* __CLUSTER_H__ */