f4e2a408c49469fba79835af32f5d58bc41f6402
[l2tpns.git] / cluster.h
1 // L2TPNS Clustering Stuff
2 // $Id: cluster.h,v 1.11 2005-05-26 12:17:30 bodea Exp $
3
4 #ifndef __CLUSTER_H__
5 #define __CLUSTER_H__
6
7
8 #define C_HEARTBEAT 1
9 #define C_ACK 2
10 #define C_PING 3
11 #define C_TUNNEL 4 // Tunnel structure.
12 #define C_SESSION 5 // Session structure.
13 #define C_GOODBYE 6
14 #define C_LASTSEEN 7 // Tell master the last heartbeat that I handled.
15 #define C_KILL 8 // Tell a slave to die.
16 #define C_FORWARD 9 // Forwarded packet..
17 #define C_BYTES 10 // Update byte counters.
18 #define C_THROTTLE 11 // A packet for the master to throttle. (The TBF tells direction).
19 #define C_CSESSION 12 // Compressed session structure.
20 #define C_CTUNNEL 13 // Compressed tunnel structure.
21 #define C_GARDEN 14 // Gardened packet
22 #define C_MASTER 15 // Tell a slave the address of the master.
23
24 #define HB_VERSION 5 // Protocol version number..
25 #define HB_MAX_SEQ (1<<30) // Maximum sequence number. (MUST BE A POWER OF 2!)
26 #define HB_HISTORY_SIZE 64 // How many old heartbeats we remember?? (Must be a factor of HB_MAX_SEQ)
27
28 #define PING_INTERVAL 5 // 0.5 seconds. Needs to be short to keep session tables fresh.
29 #define HB_TIMEOUT (15*2*PING_INTERVAL) // 15 seconds without heartbeat triggers an election..
30
31 #define CLUSTERPORT 32792
32 #define CLUSTER_MAX_SIZE 32 // No more than 32 machines in a cluster!
33
34 #define DEFAULT_MCAST_ADDR "239.192.13.13" // Need an assigned number!
35 #define DEFAULT_MCAST_INTERFACE "eth0"
36
37 typedef struct {
38 uint32_t version; // protocol version.
39 uint32_t seq; // Sequence number for this heatbeat.
40 uint32_t basetime; // What time I started
41 uint32_t clusterid; // Id for this cluster?
42
43 uint32_t highsession; // Id of the highest in-use session.
44 uint32_t freesession; // Id of the first free session.
45 uint32_t hightunnel; // Id of the highest used tunnel.
46 uint32_t size_sess; // Size of the session structure.
47
48 uint32_t size_tunn; // size of the tunnel structure.
49 uint32_t interval; // ping/heartbeat interval
50 uint32_t timeout; // heartbeat timeout
51
52 uint64_t table_version; // # state changes processed by cluster
53
54 char reserved[128 - 13*sizeof(uint32_t)]; // Pad out to 128 bytes.
55 } heartt;
56
57 typedef struct { /* Used to update byte counters on the */
58 /* master. */
59 uint32_t sid;
60 uint32_t in;
61 uint32_t out;
62 } bytest;
63
64 typedef struct {
65 in_addr_t addr; // peer address
66 uint32_t ver; // version of structure.
67 uint32_t undef; // Number of undefined structures. 0 if up-to-date.
68 uint32_t basetime; // start time of this peer.
69 } pingt;
70
71 int cluster_init(void);
72 int processcluster(char *buf, int size, in_addr_t addr);
73 int cluster_send_session(int sid);
74 int cluster_send_tunnel(int tid);
75 int master_forward_packet(char *data, int size, in_addr_t addr, int port);
76 int master_throttle_packet(int tid, char *data, int size);
77 int master_garden_packet(sessionidt s, char *data, int size);
78 void master_update_counts(void);
79 void cluster_send_ping(time_t basetime);
80 void cluster_heartbeat(void);
81 void cluster_check_master(void);
82 void cluster_check_slaves(void);
83 int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc);
84
85 #endif /* __CLUSTER_H__ */