cluster.h

   1 // L2TPNS Clustering Stuff
   2 // $Id: cluster.h,v 1.16 2006/12/04 20:54:51 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 #define C_FORWARD_DAE           16      // A DAE packet for the master to handle
  24 #define C_BUNDLE                17      // Bundle structure.
  25 #define C_CBUNDLE               18      // Compressed bundle structure.
  26
  27 #define HB_VERSION              5       // Protocol version number..
  28 #define HB_MAX_SEQ              (1<<30) // Maximum sequence number. (MUST BE A POWER OF 2!)
  29 #define HB_HISTORY_SIZE         64      // How many old heartbeats we remember?? (Must be a factor of HB_MAX_SEQ)
  30
  31 #define PING_INTERVAL           5       // 0.5 seconds. Needs to be short to keep session tables fresh.
  32 #define HB_TIMEOUT              (15*2*PING_INTERVAL) // 15 seconds without heartbeat triggers an election..
  33
  34 #define CLUSTERPORT             32792
  35 #define CLUSTER_MAX_SIZE        32      // No more than 32 machines in a cluster!
  36
  37 #define DEFAULT_MCAST_ADDR      "239.192.13.13"         // Need an assigned number!
  38 #define DEFAULT_MCAST_INTERFACE "eth0"
  39
  40 typedef struct {
  41         uint32_t version;       // protocol version.
  42         uint32_t seq;           // Sequence number for this heatbeat.
  43         uint32_t basetime;      // What time I started
  44         uint32_t clusterid;     // Id for this cluster?
  45
  46         uint32_t highsession;   // Id of the highest in-use session.
  47         uint32_t freesession;   // Id of the first free session.
  48         uint32_t highbundle;    // Id of the highest used bundle.
  49         uint32_t hightunnel;    // Id of the highest used tunnel.
  50         uint32_t size_sess;     // Size of the session structure.
  51
  52         uint32_t size_bund;     // size of the bundle structure.
  53         uint32_t size_tunn;     // size of the tunnel structure.
  54         uint32_t interval;      // ping/heartbeat interval
  55         uint32_t timeout;       // heartbeat timeout
  56
  57         uint64_t table_version; // # state changes processed by cluster
  58
  59         char reserved[128 - 13*sizeof(uint32_t) - sizeof(uint64_t)];    // Pad out to 128 bytes.
  60 } heartt;
  61
  62 typedef struct {                /* Used to update byte counters on the */
  63                                 /* master. */
  64         uint32_t sid;
  65         uint32_t pin;
  66         uint32_t pout;
  67         uint32_t cin;
  68         uint32_t cout;
  69 } bytest;
  70
  71 typedef struct {
  72         in_addr_t addr;         // peer address
  73         uint32_t ver;           // version of structure.
  74         uint32_t undef;         // Number of undefined structures. 0 if up-to-date.
  75         uint32_t basetime;      // start time of this peer.
  76 } pingt;
  77
  78 int cluster_init(void);
  79 int processcluster(uint8_t *buf, int size, in_addr_t addr);
  80 int cluster_send_session(int sid);
  81 int cluster_send_bundle(int bid);
  82 int cluster_send_tunnel(int tid);
  83 int master_forward_packet(uint8_t *data, int size, in_addr_t addr, int port);
  84 int master_forward_dae_packet(uint8_t *data, int size, in_addr_t addr, int port);
  85 int master_throttle_packet(int tid, uint8_t *data, int size);
  86 int master_garden_packet(sessionidt s, uint8_t *data, int size);
  87 void master_update_counts(void);
  88 void cluster_send_ping(time_t basetime);
  89 void cluster_heartbeat(void);
  90 void cluster_check_master(void);
  91 void cluster_check_slaves(void);
  92 int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc);
  93
  94 #endif /* __CLUSTER_H__ */