// 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 1.73.2.11 2005/05/30 02:55:41 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.73.2.16 2005/06/01 01:10:15 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("cleanup_limit", cleanup_limit, 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)
-static clockt now(void)
+// return internal time (10ths since process startup), set f if given
+static clockt now(double *f)
{
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() + 10 * (1 << try);
+ return now(NULL) + 10 * (1 << try);
}
// Else discard.
}
-// Handle retries, timeouts
-static int regular_cleanups(void)
+// 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)
{
- 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;
+ // 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;
+
+ int i;
int a;
- LOG(3, 0, 0, "Begin regular cleanup\n");
+ // 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;
- 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++)
+ 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++)
{
+ 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++;
+ }
}
- count = 0;
- for (i = 1; i <= config->cluster_highest_sessionid; i++)
+ for (i = 0; i < s_slice; 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");
- if (++count >= config->cleanup_limit) break;
+ s_actions++;
continue;
}
{
sessionshutdown(s, "No response to LCP ECHO requests");
STAT(session_timeout);
- if (++count >= config->cleanup_limit) break;
+ s_actions++;
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
- if (++count >= config->cleanup_limit) break;
+ s_actions++;
}
// 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 >= config->cleanup_limit) 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);
}
}
- if (count >= config->cleanup_limit)
- 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;
+ 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);
}
-
//
// 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();
+ TIME = now(NULL);
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. 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)
+ // Handle timeouts, retries etc.
{
- if (regular_cleanups())
+ 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)
{
- // Did it finish?
- next_clean = time_now + 1 ; // Didn't finish. Check quickly.
+ regular_cleanups(diff);
+ last_clean = this_clean;
}
- else
+ }
+
+ if (*config->accounting_dir)
+ {
+ static clockt next_acct = 0;
+ static clockt next_shut_acct = 0;
+
+ 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)
{
- next_clean = time_now + config->cleanup_interval; // Did. Move to next interval.
+ // Dump accounting data for shutdown sessions
+ next_shut_acct = TIME + ACCT_SHUT_TIME;
+ if (shut_acct_n)
+ dump_acct_info(0);
}
}
}
}
}
memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
- if (!config->cleanup_interval) config->cleanup_interval = 2;
- if (!config->cleanup_limit) config->cleanup_limit = 50;
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 / blobdiff