// Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
// vim: sw=8 ts=8
-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.73.2.16 2005/06/01 01:10:15 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.73.2.17 2005/07/03 02:40:22 bodea Exp $";
#include <arpa/inet.h>
#include <assert.h>
CONFIG("accounting_dir", accounting_dir, STRING),
CONFIG("setuid", target_uid, INT),
CONFIG("dump_speed", dump_speed, BOOL),
+ CONFIG("cleanup_interval", cleanup_interval, INT),
CONFIG("multi_read_count", multi_read_count, INT),
CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
CONFIG("lock_pages", lock_pages, BOOL),
// on slaves, alow BGP to withdraw cleanly before exiting
#define QUIT_DELAY 5
-// return internal time (10ths since process startup), set f if given
-static clockt now(double *f)
+// return internal time (10ths since process startup)
+static clockt now(void)
{
struct timeval t;
gettimeofday(&t, 0);
- if (f) *f = t.tv_sec + t.tv_usec / 1000000.0;
return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
}
clockt backoff(uint8_t try)
{
if (try > 5) try = 5; // max backoff
- return now(NULL) + 10 * (1 << try);
+ return now() + 10 * (1 << try);
}
// Else discard.
}
-// Handle retries, timeouts. Runs every 1/10th sec, want to ensure
-// that we look at the whole of the tunnel, radius and session tables
-// every second
-static void regular_cleanups(double period)
-{
- // Next tunnel, radius and session to check for actions on.
- static tunnelidt t = 0;
- static int r = 0;
- static sessionidt s = 0;
-
- int t_actions = 0;
- int r_actions = 0;
- int s_actions = 0;
-
- int t_slice;
- int r_slice;
- int s_slice;
+//
+// Maximum number of actions to complete.
+// This is to avoid sending out too many packets
+// at once.
+#define MAX_ACTIONS 500
- int i;
+static int regular_cleanups(void)
+{
+ static sessionidt s = 0; // Next session to check for actions on.
+ tunnelidt t;
+ int count=0,i;
+ uint16_t r;
+ static clockt next_acct = 0;
+ static clockt next_shut_acct = 0;
int a;
- // divide up tables into slices based on the last run
- t_slice = config->cluster_highest_tunnelid * period;
- r_slice = (MAXRADIUS - 1) * period;
- s_slice = config->cluster_highest_sessionid * period;
+ LOG(3, 0, 0, "Begin regular cleanup\n");
- if (t_slice < 1)
- t_slice = 1;
- else if (t_slice > config->cluster_highest_tunnelid)
- t_slice = config->cluster_highest_tunnelid;
-
- if (r_slice < 1)
- r_slice = 1;
- else if (r_slice > (MAXRADIUS - 1))
- r_slice = MAXRADIUS - 1;
-
- if (s_slice < 1)
- s_slice = 1;
- else if (s_slice > config->cluster_highest_sessionid)
- s_slice = config->cluster_highest_sessionid;
-
- LOG(4, 0, 0, "Begin regular cleanup (last %f seconds ago)\n", period);
-
- for (i = 0; i < t_slice; i++)
+ for (r = 1; r < MAXRADIUS; r++)
+ {
+ if (!radius[r].state)
+ continue;
+ if (radius[r].retry)
+ {
+ if (radius[r].retry <= TIME)
+ radiusretry(r);
+ } else
+ radius[r].retry = backoff(radius[r].try+1); // Is this really needed? --mo
+ }
+ for (t = 1; t <= config->cluster_highest_tunnelid; t++)
{
- t++;
- if (t > config->cluster_highest_tunnelid)
- t = 1;
-
// check for expired tunnels
if (tunnel[t].die && tunnel[t].die <= TIME)
{
STAT(tunnel_timeout);
tunnelkill(t, "Expired");
- t_actions++;
continue;
}
// check for message resend
tunnelsend(c->buf, c->length, t);
c = c->next;
}
-
- t_actions++;
}
}
// Send hello
controlt *c = controlnew(6); // sending HELLO
controladd(c, t, 0); // send the message
LOG(3, 0, t, "Sending HELLO message\n");
- t_actions++;
}
// Check for tunnel changes requested from the CLI
{
LOG(2, 0, t, "Dropping tunnel by CLI\n");
tunnelshutdown(t, "Requested by administrator");
- t_actions++;
}
}
- }
- for (i = 0; i < r_slice; i++)
- {
- r++;
- if (r >= MAXRADIUS)
- r = 1;
-
- if (!radius[r].state)
- continue;
-
- if (radius[r].retry <= TIME)
- {
- radiusretry(r);
- r_actions++;
- }
}
- for (i = 0; i < s_slice; i++)
+ count = 0;
+ for (i = 1; i <= config->cluster_highest_sessionid; i++)
{
s++;
if (s > config->cluster_highest_sessionid)
// IPCP has not completed yet. Resend
LOG(3, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n");
sendipcp(session[s].tunnel, s);
- s_actions++;
}
// check for expired sessions
if (session[s].die && session[s].die <= TIME)
{
sessionkill(s, "Expired");
- s_actions++;
+ if (++count >= MAX_ACTIONS) break;
continue;
}
{
sessionshutdown(s, "No response to LCP ECHO requests");
STAT(session_timeout);
- s_actions++;
+ if (++count >= MAX_ACTIONS) break;
continue;
}
LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
(int)(time_now - session[s].last_packet));
tunnelsend(b, 24, session[s].tunnel); // send it
- s_actions++;
+ if (++count >= MAX_ACTIONS) break;
}
// Check for actions requested from the CLI
LOG(2, s, session[s].tunnel, "Dropping session by CLI\n");
sessionshutdown(s, "Requested by administrator");
a = 0; // dead, no need to check for other actions
- s_actions++;
}
if (a & CLI_SESS_NOSNOOP)
LOG(2, s, session[s].tunnel, "Unsnooping session by CLI\n");
session[s].snoop_ip = 0;
session[s].snoop_port = 0;
- s_actions++;
send++;
}
else if (a & CLI_SESS_SNOOP)
session[s].snoop_ip = cli_session_actions[s].snoop_ip;
session[s].snoop_port = cli_session_actions[s].snoop_port;
- s_actions++;
send++;
}
{
LOG(2, s, session[s].tunnel, "Un-throttling session by CLI\n");
throttle_session(s, 0, 0);
- s_actions++;
send++;
}
else if (a & CLI_SESS_THROTTLE)
cli_session_actions[s].throttle_out);
throttle_session(s, cli_session_actions[s].throttle_in, cli_session_actions[s].throttle_out);
- s_actions++;
send++;
}
{
LOG(2, s, session[s].tunnel, "Un-filtering session by CLI\n");
filter_session(s, 0, 0);
- s_actions++;
send++;
}
else if (a & CLI_SESS_FILTER)
cli_session_actions[s].filter_out);
filter_session(s, cli_session_actions[s].filter_in, cli_session_actions[s].filter_out);
- s_actions++;
send++;
}
if (send)
cluster_send_session(s);
+
+ if (++count >= MAX_ACTIONS) break;
+ }
+ }
+
+ if (*config->accounting_dir)
+ {
+ if (next_acct <= TIME)
+ {
+ // Dump accounting data
+ next_acct = TIME + ACCT_TIME;
+ next_shut_acct = TIME + ACCT_SHUT_TIME;
+ dump_acct_info(1);
+ }
+ else if (next_shut_acct <= TIME)
+ {
+ // Dump accounting data for shutdown sessions
+ next_shut_acct = TIME + ACCT_SHUT_TIME;
+ if (shut_acct_n)
+ dump_acct_info(0);
}
}
- LOG(4, 0, 0, "End regular cleanup: checked %d/%d/%d tunnels/radius/sessions; %d/%d/%d actions\n",
- t_slice, r_slice, s_slice, t_actions, r_actions, s_actions);
+ if (count >= MAX_ACTIONS)
+ return 1; // Didn't finish!
+
+ LOG(3, 0, 0, "End regular cleanup (%d actions), next in %d seconds\n", count, config->cleanup_interval);
+ return 0;
}
+
//
// Are we in the middle of a tunnel update, or radius
// requests??
uint8_t buf[65536];
struct timeval to;
clockt next_cluster_ping = 0; // send initial ping immediately
+ time_t next_clean = time_now + config->cleanup_interval;
LOG(4, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
udpfd, tunfd, cluster_sockfd, controlfd);
fd_set w;
int bgp_set[BGP_NUM_PEERS];
#endif /* BGP */
- int more = 0;
if (config->reload_config)
{
STAT(select_called);
- TIME = now(NULL);
+ TIME = now();
if (n < 0)
{
if (errno == EINTR ||
config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
STAT(multi_read_exceeded);
- more++;
}
}
next_cluster_ping = TIME + config->cluster_hb_interval;
}
- if (!config->cluster_iam_master)
- continue;
-
// Run token bucket filtering queue..
// Only run it every 1/10th of a second.
+ // Runs on all machines both master and slave.
{
static clockt last_run = 0;
if (last_run != TIME)
}
}
- // Handle timeouts, retries etc.
- {
- static double last_clean = 0;
- double this_clean;
- double diff;
-
- TIME = now(&this_clean);
- diff = this_clean - last_clean;
-
- // Run during idle time (after we've handled
- // all incoming packets) or every 1/10th sec
- if (!more || diff > 0.1)
- {
- regular_cleanups(diff);
- last_clean = this_clean;
- }
- }
-
- if (*config->accounting_dir)
+ /* Handle timeouts. Make sure that this gets run anyway, even if there was
+ * something to read, else under load this will never actually run....
+ *
+ */
+ if (config->cluster_iam_master && next_clean <= time_now)
{
- static clockt next_acct = 0;
- static clockt next_shut_acct = 0;
-
- if (next_acct <= TIME)
+ if (regular_cleanups())
{
- // Dump accounting data
- next_acct = TIME + ACCT_TIME;
- next_shut_acct = TIME + ACCT_SHUT_TIME;
- dump_acct_info(1);
+ // Did it finish?
+ next_clean = time_now + 1 ; // Didn't finish. Check quickly.
}
- else if (next_shut_acct <= TIME)
+ else
{
- // Dump accounting data for shutdown sessions
- next_shut_acct = TIME + ACCT_SHUT_TIME;
- if (shut_acct_n)
- dump_acct_info(0);
+ next_clean = time_now + config->cleanup_interval; // Did. Move to next interval.
}
}
}
}
}
memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
+ if (!config->cleanup_interval) config->cleanup_interval = 10;
if (!config->multi_read_count) config->multi_read_count = 10;
if (!config->cluster_address) config->cluster_address = inet_addr(DEFAULT_MCAST_ADDR);
if (!*config->cluster_interface)
projects / l2tpns.git / commitdiff