cluster.h

   1 // L2TPNS Clustering Stuff
   2 // $Id: cluster.h,v 1.5 2004-07-08 16:54:35 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
  23 #define HB_VERSION              3       // Protocol version number..
  24 #define HB_MAX_SEQ              (1<<30) // Maximum sequence number. (MUST BE A POWER OF 2!)
  25 #define HB_HISTORY_SIZE         64      // How many old heartbeats we remember?? (Must be a factor of HB_MAX_SEQ)
  26
  27 #define PING_INTERVAL           5       // 0.5 seconds. Needs to be short to keep session tables fresh.
  28 #define HB_TIMEOUT              (15*2*PING_INTERVAL) // 15 seconds without heartbeat triggers an election..
  29
  30 #define CLUSTERPORT             32792
  31 #define CLUSTER_MAX_SIZE        32      // No more than 32 machines in a cluster!
  32
  33 #define DEFAULT_MCAST_ADDR      "239.192.13.13"         // Need an assigned number!
  34 #define DEFAULT_MCAST_INTERFACE "eth0"
  35
  36 typedef struct {
  37         u32     version;        // protocol version.
  38         u32     seq;            // Sequence number for this heatbeat.
  39         u32     basetime;       // What time I started
  40         u32     clusterid;      // Id for this cluster?
  41
  42         u32     highsession;    // Id of the highest in-use session.
  43         u32     freesession;    // Id of the first free session.
  44         u32     hightunnel;     // Id of the highest used tunnel.
  45         u32     size_sess;      // Size of the session structure.
  46
  47         u32     size_tunn;      // size of the tunnel structure.
  48         u32     interval;       // ping/heartbeat interval (if changed)
  49         u32     timeout;        // heartbeat timeout (if changed)
  50
  51         char reserved[128 - 11*sizeof(u32)];    // Pad out to 128 bytes.
  52 } heartt;
  53
  54 typedef struct {                /* Used to update byte counters on the */
  55                                 /* master. */
  56         u32        sid;
  57         u32        in;
  58         u32        out;
  59 } bytest;
  60
  61 typedef struct {
  62         u32     addr;           //
  63         u32     ver;            // version of structure.
  64         u32     undef;          // Number of undefined structures. 0 if up-to-date.
  65         u32     basetime;       // start time of this peer.
  66 } pingt;
  67
  68 int cluster_init();
  69 int processcluster(char *buf, int size, u32 addr);
  70 int cluster_forward_packet(char *buf, int size, u32 addr);
  71 int cluster_send_session(int sid);
  72 int cluster_send_tunnel(int tid);
  73 int master_forward_packet(char * data, int size, u32 addr, int port);
  74 int master_throttle_packet(int tid, char * data, int size);
  75 int master_garden_packet(sessionidt s, char * data, int size);
  76 void master_update_counts(void);
  77
  78 void cluster_send_ping(time_t basetime);
  79 void cluster_heartbeat(void);
  80 void cluster_check_master(void);
  81 void cluster_check_slaves(void);
  82 int show_cluster(struct cli_def *cli, char *command, char **argv, int argc);
  83
  84 #endif /* __CLUSTER_H__ */