Fix: improved load balancing algorithm

[l2tpns.git] / cluster.h

diff --git a/cluster.h b/cluster.h
index 57759fc..794cc9d 100644 (file)
--- a/cluster.h
+++ b/cluster.h
@@ -1,18 +1,105 @@
 // L2TPNS Clustering Stuff
 // L2TPNS Clustering Stuff

-// $Id: cluster.h,v 1.1 2003-12-16 07:07:39 fred_nerk Exp $
+// $Id: cluster.h,v 1.16 2006-12-04 20:54:51 bodea Exp $

 
 

-#define C_HELLO                        1
-#define C_HELLO_RESPONSE       2
+#ifndef __CLUSTER_H__
+#define __CLUSTER_H__
+
+
+#define C_HEARTBEAT            1
+#define C_ACK                  2

 #define C_PING                 3
 #define C_PING                 3

-#define C_TUNNEL               4
-#define C_SESSION              5
+#define C_TUNNEL               4       // Tunnel structure.
+#define C_SESSION              5       // Session structure.
+#define C_GOODBYE              6
+#define C_LASTSEEN             7       // Tell master the last heartbeat that I handled.
+#define C_KILL                 8       // Tell a slave to die.
+#define C_FORWARD              9       // Forwarded packet..
+#define C_BYTES                        10      // Update byte counters.
+#define C_THROTTLE             11      // A packet for the master to throttle. (The TBF tells direction).
+#define C_CSESSION             12      // Compressed session structure.
+#define C_CTUNNEL              13      // Compressed tunnel structure.
+#define C_GARDEN               14      // Gardened packet
+#define C_MASTER               15      // Tell a slave the address of the master.
+#define C_FORWARD_DAE          16      // A DAE packet for the master to handle
+#define C_BUNDLE               17      // Bundle structure.
+#define C_CBUNDLE              18      // Compressed bundle structure.
+#define C_MPPP_FORWARD 19      // MPPP Forwarded packet..
+#define C_PPPOE_FORWARD        20      // PPPOE Forwarded packet..
+#define C_GROUPE               21      // Groupe structure.
+#define C_CGROUPE              22      // Compressed groupe structure.
+
+
+#define HB_VERSION             7       // Protocol version number..
+#define HB_MAX_SEQ             (1<<30) // Maximum sequence number. (MUST BE A POWER OF 2!)
+#define HB_HISTORY_SIZE                64      // How many old heartbeats we remember?? (Must be a factor of HB_MAX_SEQ)
+
+#define PING_INTERVAL          5       // 0.5 seconds. Needs to be short to keep session tables fresh.
+#define HB_TIMEOUT             (15*2*PING_INTERVAL) // 15 seconds without heartbeat triggers an election..

 
 #define CLUSTERPORT            32792
 
 #define CLUSTERPORT            32792

-#define CLUSTERCLIENTPORT      32793
-#define UDP                    17
-#define TIMEOUT                        20
-#define IL                     sizeof(int)
-
-int cluster_init(uint32_t bind_address, int server);
-int cluster_send_message(unsigned long ip_address, uint32_t vip, char type, void *data, int datalen);
-int processcluster(char *buf, int l);
+#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
+
+       uint32_t highgroupe;    // Id of the highest used groupe.
+       uint32_t nextgrpid;     // nextgrpid to set gnextgrpid on slave
+
+       char reserved[128 - 15*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_send_session(int sid);
+int cluster_send_bundle(int bid);
+int cluster_send_groupe(int gid);
+int cluster_send_tunnel(int tid);
+int master_forward_packet(uint8_t *data, int size, in_addr_t addr, uint16_t port, uint16_t indexudp);
+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);
+int master_forward_pppoe_packet(uint8_t *data, int size, uint8_t codepad);
+
+#endif /* __CLUSTER_H__ */