// L2TPNS Clustering Stuff
-char const *cvs_id_cluster = "$Id: cluster.c,v 1.25 2004-12-16 08:49:53 bodea Exp $";
+char const *cvs_id_cluster = "$Id: cluster.c,v 1.36 2005-05-07 10:14:33 bodea Exp $";
#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <inttypes.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <string.h>
#include <malloc.h>
#include <errno.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <unistd.h>
-#include <stdio.h>
#include <libcli.h>
-#include <inttypes.h>
#include "l2tpns.h"
#include "cluster.h"
*/
// Module variables.
-int cluster_sockfd = 0; // The filedescriptor for the cluster communications port.
+int cluster_sockfd = 0; // The filedescriptor for the cluster communications port.
in_addr_t my_address = 0; // The network address of my ethernet port.
static int walk_session_number = 0; // The next session to send when doing the slow table walk.
static int walk_tunnel_number = 0; // The next tunnel to send when doing the slow table walk.
+int forked = 0; // Sanity check: CLI must not diddle with heartbeat table
#define MAX_HEART_SIZE (8192) // Maximum size of heartbeat packet. Must be less than max IP packet size :)
#define MAX_CHANGES (MAX_HEART_SIZE/(sizeof(sessiont) + sizeof(int) ) - 2) // Assumes a session is the biggest type!
static struct {
in_addr_t peer;
- time_t basetime;
+ uint32_t basetime;
clockt timestamp;
int uptodate;
} peers[CLUSTER_MAX_SIZE]; // List of all the peers we've heard from.
if ( walk_session_number > config->cluster_highest_sessionid)
walk_session_number = 1;
- if (!sess_count[walk_session_number].cin && !sess_count[walk_session_number].cout)
+ if (!sess_local[walk_session_number].cin && !sess_local[walk_session_number].cout)
continue; // Unused. Skip it.
b[c].sid = walk_session_number;
- b[c].in = sess_count[walk_session_number].cin;
- b[c].out = sess_count[walk_session_number].cout;
+ b[c].in = sess_local[walk_session_number].cin;
+ b[c].out = sess_local[walk_session_number].cout;
if (++c > MAX_B_RECS) // Send a max of 400 elements in a packet.
break;
// Reset counters.
- sess_count[walk_session_number].cin = sess_count[walk_session_number].cout = 0;
+ sess_local[walk_session_number].cin = sess_local[walk_session_number].cout = 0;
}
if (!c) // Didn't find any that changes. Get out of here!
++count;
}
- if (session[i].tunnel == T_FREE) { // Unused session. Add to free list.
+ if (!session[i].opened) { // Unused session. Add to free list.
+ memset(&session[i], 0, sizeof(session[i]));
+ session[i].tunnel = T_FREE;
session[last_free].next = i;
session[i].next = 0;
last_free = i;
+ continue;
}
- // Reset all the idle timeouts..
+ // Reset idle timeouts..
session[i].last_packet = time_now;
+ // Reset die relative to our uptime rather than the old master's
+ if (session[i].die) session[i].die = TIME;
+
// Accumulate un-sent byte counters.
- session[i].cin += sess_count[i].cin;
- session[i].cout += sess_count[i].cout;
- session[i].total_cin += sess_count[i].cin;
- session[i].total_cout += sess_count[i].cout;
+ session[i].cin += sess_local[i].cin;
+ session[i].cout += sess_local[i].cout;
+ session[i].total_cin += sess_local[i].cin;
+ session[i].total_cout += sess_local[i].cout;
- sess_count[i].cin = sess_count[i].cout = 0;
+ sess_local[i].cin = sess_local[i].cout = 0;
- session[i].radius = 0; // Reset authentication as the radius blocks aren't up to date.
+ sess_local[i].radius = 0; // Reset authentication as the radius blocks aren't up to date.
if (session[i].unique_id >= high_unique_id) // This is different to the index into the session table!!!
high_unique_id = session[i].unique_id+1;
-
session[i].tbf_in = session[i].tbf_out = 0; // Remove stale pointers from old master.
throttle_session(i, session[i].throttle_in, session[i].throttle_out);
- if (session[i].tunnel != T_FREE && i > config->cluster_highest_sessionid)
- config->cluster_highest_sessionid = i;
+ config->cluster_highest_sessionid = i;
}
session[last_free].next = 0; // End of chain.
- last_id = high_unique_id; // Keep track of the highest used session ID.
+ last_id = high_unique_id; // Keep track of the highest used session ID.
become_master();
config->cluster_undefined_sessions = 0;
for (i = 1 ; i < MAXSESSION; ++i) {
if (i > highsession) {
- session[i].tunnel = 0; // Defined.
+ if (session[i].tunnel == T_UNDEF) session[i].tunnel = T_FREE; // Defined.
continue;
}
- if (session[i].tunnel != T_UNDEF)
- continue;
- ++config->cluster_undefined_sessions;
+
+ if (session[i].tunnel == T_UNDEF)
+ ++config->cluster_undefined_sessions;
}
// Clear out defined tunnels, counting the number of
config->cluster_undefined_tunnels = 0;
for (i = 1 ; i < MAXTUNNEL; ++i) {
if (i > hightunnel) {
- tunnel[i].state = TUNNELFREE; // Defined.
+ if (tunnel[i].state == TUNNELUNDEF) tunnel[i].state = TUNNELFREE; // Defined.
continue;
}
- if (tunnel[i].state != TUNNELUNDEF)
- continue;
- ++config->cluster_undefined_tunnels;
+
+ if (tunnel[i].state == TUNNELUNDEF)
+ ++config->cluster_undefined_tunnels;
}
return -1;
}
+ if (forked) {
+ LOG(0, sid, 0, "cluster_send_session called from child process!\n");
+ return -1;
+ }
+
return type_changed(C_CSESSION, sid);
}
session[b->sid].cin += b->in;
session[b->sid].cout += b->out;
- session[b->sid].last_packet = time_now; // Reset idle timer!
+
+ if (b->in)
+ session[b->sid].last_packet = time_now; // Reset idle timer!
size -= sizeof(*b);
++b;
config->cluster_last_hb = TIME; // Reset to ensure that we don't become master!!
if (config->cluster_seq_number != h->seq) { // Out of sequence heartbeat!
- LOG(1, 0, 0, "HB: Got seq# %d but was expecting %d. asking for resend.\n", h->seq, config->cluster_seq_number);
+ static int lastseen_seq = 0;
+ static time_t lastseen_time = 0;
+
+ // limit to once per second for a particular seq#
+ int ask = (config->cluster_seq_number != lastseen_seq || time_now != lastseen_time);
- peer_send_message(addr, C_LASTSEEN, config->cluster_seq_number, NULL, 0);
+ LOG(1, 0, 0, "HB: Got seq# %d but was expecting %d. %s.\n",
+ h->seq, config->cluster_seq_number,
+ ask ? "Asking for resend" : "Ignoring");
+
+ if (ask)
+ {
+ lastseen_seq = config->cluster_seq_number;
+ lastseen_time = time_now;
+ peer_send_message(addr, C_LASTSEEN, config->cluster_seq_number, NULL, 0);
+ }
config->cluster_last_hb = TIME; // Reset to ensure that we don't become master!!
return cluster_add_peer(addr, more, (pingt *) p, s);
case C_LASTSEEN: // Catch up a slave (slave missed a packet).
+ if (!config->cluster_iam_master) { // huh?
+ LOG(0, 0, 0, "I'm not the master, but I got a C_LASTSEEN from %s?\n", fmtaddr(addr, 0));
+ return -1;
+ }
+
return cluster_catchup_slave(more, addr);
case C_FORWARD: { // Forwarded control packet. pass off to processudp.
: "Not defined",
0.1 * (TIME - config->cluster_last_hb));
cli_print(cli, "Uptodate : %s", config->cluster_iam_uptodate ? "Yes" : "No");
- cli_print(cli, "Table version # : %llu", config->cluster_table_version);
+ cli_print(cli, "Table version # : %" PRIu64, config->cluster_table_version);
cli_print(cli, "Next sequence number expected: %d", config->cluster_seq_number);
cli_print(cli, "%d sessions undefined of %d", config->cluster_undefined_sessions, config->cluster_highest_sessionid);
cli_print(cli, "%d tunnels undefined of %d", config->cluster_undefined_tunnels, config->cluster_highest_tunnelid);
} else {
- cli_print(cli, "Table version # : %llu", config->cluster_table_version);
+ cli_print(cli, "Table version # : %" PRIu64, config->cluster_table_version);
cli_print(cli, "Next heartbeat # : %d", config->cluster_seq_number);
cli_print(cli, "Highest session : %d", config->cluster_highest_sessionid);
cli_print(cli, "Highest tunnel : %d", config->cluster_highest_tunnelid);
if (num_peers)
cli_print(cli, "%20s %10s %8s", "Address", "Basetime", "Age");
for (i = 0; i < num_peers; ++i) {
- cli_print(cli, "%20s %10d %8d", fmtaddr(peers[i].peer, 0),
+ cli_print(cli, "%20s %10u %8d", fmtaddr(peers[i].peer, 0),
peers[i].basetime, TIME - peers[i].timestamp);
}
return CLI_OK;
projects / l2tpns.git / blobdiff