// 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 1.51 2006/04/27 09:53:49 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.
+extern int cluster_sockfd; // 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_bundle_number = 0; // The next bundle 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 {
int seq;
int size;
- char data[MAX_HEART_SIZE];
+ uint8_t data[MAX_HEART_SIZE];
} past_hearts[HB_HISTORY_SIZE]; // Ring buffer of heartbeats that we've recently sent out. Needed so
// we can re-transmit if needed.
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.
int opt;
config->cluster_undefined_sessions = MAXSESSION-1;
+ config->cluster_undefined_bundles = MAXBUNDLE-1;
config->cluster_undefined_tunnels = MAXTUNNEL-1;
if (!config->cluster_address)
opt = 0; // Turn off multicast loopback.
setsockopt(cluster_sockfd, IPPROTO_IP, IP_MULTICAST_LOOP, &opt, sizeof(opt));
+ if (config->cluster_mcast_ttl != 1)
+ {
+ uint8_t ttl = 0;
+ if (config->cluster_mcast_ttl > 0)
+ ttl = config->cluster_mcast_ttl < 256 ? config->cluster_mcast_ttl : 255;
+
+ setsockopt(cluster_sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
+ }
+
if (setsockopt(cluster_sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
{
LOG(0, 0, 0, "Failed to setsockopt (join mcast group): %s\n", strerror(errno));
// Maintains the format. Assumes that the caller
// has passed in a big enough buffer!
//
-static void add_type(char **p, int type, int more, char *data, int size)
+static void add_type(uint8_t **p, int type, int more, uint8_t *data, int size)
{
*((uint32_t *) (*p)) = type;
*p += sizeof(uint32_t);
}
// advertise our presence via BGP or gratuitous ARP
-static void advertise(void)
+static void advertise_routes(void)
{
#ifdef BGP
if (bgp_configured)
send_garp(config->bind_address); // Start taking traffic.
}
+// withdraw our routes (BGP only)
+static void withdraw_routes(void)
+{
+#ifdef BGP
+ if (bgp_configured)
+ bgp_enable_routing(0);
+#endif /* BGP */
+}
+
static void cluster_uptodate(void)
{
if (config->cluster_iam_uptodate)
return;
- if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels)
+ if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels || config->cluster_undefined_bundles)
return;
config->cluster_iam_uptodate = 1;
LOG(0, 0, 0, "Now uptodate with master.\n");
- advertise();
+ advertise_routes();
}
//
// Send a unicast UDP packet to a peer with 'data' as the
// contents.
//
-static int peer_send_data(in_addr_t peer, char *data, int size)
+static int peer_send_data(in_addr_t peer, uint8_t *data, int size)
{
struct sockaddr_in addr = {0};
//
// Send a structured message to a peer with a single element of type 'type'.
//
-static int peer_send_message(in_addr_t peer, int type, int more, char *data, int size)
+static int peer_send_message(in_addr_t peer, int type, int more, uint8_t *data, int size)
{
- char buf[65536]; // Vast overkill.
- char *p = buf;
+ uint8_t buf[65536]; // Vast overkill.
+ uint8_t *p = buf;
LOG(4, 0, 0, "Sending message to peer (type %d, more %d, size %d)\n", type, more, size);
add_type(&p, type, more, data, size);
return peer_send_data(peer, buf, (p-buf) );
}
-//
-// Forward a state changing packet to the master.
-//
-// The master just processes the payload as if it had
-// received it off the tun device.
-//
-int master_forward_packet(char *data, int size, in_addr_t addr, int port)
+// send a packet to the master
+static int _forward_packet(uint8_t *data, int size, in_addr_t addr, int port, int type)
{
- char buf[65536]; // Vast overkill.
- char *p = buf;
+ uint8_t buf[65536]; // Vast overkill.
+ uint8_t *p = buf;
if (!config->cluster_master_address) // No election has been held yet. Just skip it.
return -1;
LOG(4, 0, 0, "Forwarding packet from %s to master (size %d)\n", fmtaddr(addr, 0), size);
STAT(c_forwarded);
- add_type(&p, C_FORWARD, addr, (char *) &port, sizeof(port));
+ add_type(&p, type, addr, (uint8_t *) &port, sizeof(port)); // ick. should be uint16_t
memcpy(p, data, size);
p += size;
return peer_send_data(config->cluster_master_address, buf, (p - buf));
}
+//
+// Forward a state changing packet to the master.
+//
+// The master just processes the payload as if it had
+// received it off the tun device.
+//
+int master_forward_packet(uint8_t *data, int size, in_addr_t addr, int port)
+{
+ return _forward_packet(data, size, addr, port, C_FORWARD);
+}
+
+// Forward a DAE RADIUS packet to the master.
+int master_forward_dae_packet(uint8_t *data, int size, in_addr_t addr, int port)
+{
+ return _forward_packet(data, size, addr, port, C_FORWARD_DAE);
+}
+
//
// Forward a throttled packet to the master for handling.
//
// token bucket queue, and lets normal processing take care
// of it.
//
-int master_throttle_packet(int tbfid, char *data, int size)
+int master_throttle_packet(int tbfid, uint8_t *data, int size)
{
- char buf[65536]; // Vast overkill.
- char *p = buf;
+ uint8_t buf[65536]; // Vast overkill.
+ uint8_t *p = buf;
if (!config->cluster_master_address) // No election has been held yet. Just skip it.
return -1;
//
// (Note that this must be called with the tun header
// as the start of the data).
-int master_garden_packet(sessionidt s, char *data, int size)
+int master_garden_packet(sessionidt s, uint8_t *data, int size)
{
- char buf[65536]; // Vast overkill.
- char *p = buf;
+ uint8_t buf[65536]; // Vast overkill.
+ uint8_t *p = buf;
if (!config->cluster_master_address) // No election has been held yet. Just skip it.
return -1;
// Send a chunk of data as a heartbeat..
// We save it in the history buffer as we do so.
//
-static void send_heartbeat(int seq, char *data, int size)
+static void send_heartbeat(int seq, uint8_t *data, int size)
{
int i;
//
void cluster_send_ping(time_t basetime)
{
- char buff[100 + sizeof(pingt)];
- char *p = buff;
+ uint8_t buff[100 + sizeof(pingt)];
+ uint8_t *p = buff;
pingt x;
if (config->cluster_iam_master && basetime) // We're heartbeating so no need to ping.
x.undef = config->cluster_undefined_sessions + config->cluster_undefined_tunnels;
x.basetime = basetime;
- add_type(&p, C_PING, basetime, (char *) &x, sizeof(x));
+ add_type(&p, C_PING, basetime, (uint8_t *) &x, sizeof(x));
cluster_send_data(buff, (p-buff) );
}
if (config->cluster_iam_master) // Only happens on the slaves.
return;
- if (!config->cluster_master_address) // If we don't have a master, skip it for a while.
+ if (!config->cluster_master_address) // If we don't have a master, skip it for a while.
return;
- i = MAX_B_RECS * 5; // Examine max 2000 sessions;
+ // C_BYTES format changed in 2.1.0 (cluster version 5)
+ // during upgrade from previous versions, hang onto our counters
+ // for a bit until the new master comes up
+ if (config->cluster_last_hb_ver < 5)
+ return;
+
+ i = MAX_B_RECS * 5; // Examine max 3000 sessions;
if (config->cluster_highest_sessionid > i)
i = config->cluster_highest_sessionid;
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)
- continue; // Unused. Skip it.
+ if (!sess_local[walk_session_number].cin && !sess_local[walk_session_number].cout)
+ continue; // Unchanged. 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;
-
- if (++c > MAX_B_RECS) // Send a max of 400 elements in a packet.
- break;
+ b[c].pin = sess_local[walk_session_number].pin;
+ b[c].pout = sess_local[walk_session_number].pout;
+ b[c].cin = sess_local[walk_session_number].cin;
+ b[c].cout = sess_local[walk_session_number].cout;
// Reset counters.
- sess_count[walk_session_number].cin = sess_count[walk_session_number].cout = 0;
+ sess_local[walk_session_number].pin = sess_local[walk_session_number].pout = 0;
+ sess_local[walk_session_number].cin = sess_local[walk_session_number].cout = 0;
+
+ if (++c > MAX_B_RECS) // Send a max of 600 elements in a packet.
+ break;
}
if (!c) // Didn't find any that changes. Get out of here!
// Forward the data to the master.
LOG(4, 0, 0, "Sending byte counters to master (%d elements)\n", c);
- peer_send_message(config->cluster_master_address, C_BYTES, c, (char *) &b, sizeof(b[0]) * c);
+ peer_send_message(config->cluster_master_address, C_BYTES, c, (uint8_t *) &b, sizeof(b[0]) * c);
return;
}
continue; // Shutdown peer! Skip them.
if (peers[i].uptodate)
- have_peers = 1;
-
- if (!peers[i].uptodate)
+ have_peers++;
+ else
config->cluster_iam_uptodate = 0; // Start fast heartbeats
}
-#ifdef BGP
- // in a cluster, withdraw/add routes when we get a peer/lose all peers
- if (bgp_configured && have_peers != had_peers)
- bgp_enable_routing(!have_peers);
-#endif /* BGP */
+ // in a cluster, withdraw/add routes when we get a peer/lose peers
+ if (have_peers != had_peers)
+ {
+ if (had_peers < config->cluster_master_min_adv &&
+ have_peers >= config->cluster_master_min_adv)
+ withdraw_routes();
+
+ else if (had_peers >= config->cluster_master_min_adv &&
+ have_peers < config->cluster_master_min_adv)
+ advertise_routes();
+ }
}
//
//
void cluster_check_master(void)
{
- int i, count, tcount, high_unique_id = 0;
+ int i, count, tcount, bcount, high_unique_id = 0;
int last_free = 0;
clockt t = TIME;
static int probed = 0;
+ int have_peers;
if (config->cluster_iam_master)
return; // Only runs on the slaves...
// If the master is late (missed 2 hearbeats by a second and a
// hair) it may be that the switch has dropped us from the
- // multicast group, try unicasting one probe to the master
+ // multicast group, try unicasting probes to the master
// which will hopefully respond with a unicast heartbeat that
// will allow us to limp along until the querier next runs.
- if (TIME > (config->cluster_last_hb + 2 * config->cluster_hb_interval + 11))
+ if (config->cluster_master_address
+ && TIME > (config->cluster_last_hb + 2 * config->cluster_hb_interval + 11))
{
- if (!probed && config->cluster_master_address)
+ if (!probed || (TIME > (probed + 2 * config->cluster_hb_interval)))
{
- probed = 1;
+ probed = TIME;
LOG(1, 0, 0, "Heartbeat from master %.1fs late, probing...\n",
0.1 * (TIME - (config->cluster_last_hb + config->cluster_hb_interval)));
return; // Everything's ok!
config->cluster_last_hb = TIME + 1; // Just the one election thanks.
+ config->cluster_master_address = 0;
LOG(0, 0, 0, "Master timed out! Holding election...\n");
- for (i = 0; i < num_peers; i++)
+ // In the process of shutting down, can't be master
+ if (main_quit)
+ return;
+
+ for (i = have_peers = 0; i < num_peers; i++)
{
if ((peers[i].timestamp + config->cluster_hb_timeout) < t)
continue; // Stale peer! Skip them.
LOG(1, 0, 0, "Expecting %s to become master\n", fmtaddr(peers[i].peer, 0));
return; // They'll win the election. Wait for them to come up.
}
+
+ if (peers[i].uptodate)
+ have_peers++;
}
// Wow. it's been ages since I last heard a heartbeat
// to become a master!!!
config->cluster_iam_master = 1;
- config->cluster_master_address = 0;
LOG(0, 0, 0, "I am declaring myself the master!\n");
+ if (have_peers < config->cluster_master_min_adv)
+ advertise_routes();
+ else
+ withdraw_routes();
+
if (config->cluster_seq_number == -1)
config->cluster_seq_number = 0;
config->cluster_highest_tunnelid = i;
}
+ //
+ // Go through and mark all the bundles as defined.
+ // Count the highest used bundle number as well.
+ //
+ config->cluster_highest_bundleid = 0;
+ for (i = 0, bcount = 0; i < MAXBUNDLE; ++i) {
+ if (bundle[i].state == BUNDLEUNDEF)
+ bundle[i].state = BUNDLEFREE;
+
+ if (bundle[i].state != BUNDLEFREE && i > config->cluster_highest_bundleid)
+ config->cluster_highest_bundleid = i;
+ }
+
//
// Go through and mark all the sessions as being defined.
// reset the idle timeouts.
++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;
- // 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;
+ // Reset die relative to our uptime rather than the old master's
+ if (session[i].die) session[i].die = TIME;
+
+ // Accumulate un-sent byte/packet counters.
+ increment_counter(&session[i].cin, &session[i].cin_wrap, sess_local[i].cin);
+ increment_counter(&session[i].cout, &session[i].cout_wrap, sess_local[i].cout);
+ session[i].cin_delta += sess_local[i].cin;
+ session[i].cout_delta += sess_local[i].cout;
+
+ session[i].pin += sess_local[i].pin;
+ session[i].pout += sess_local[i].pout;
- sess_count[i].cin = sess_count[i].cout = 0;
+ sess_local[i].cin = sess_local[i].cout = 0;
+ sess_local[i].pin = sess_local[i].pout = 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();
rebuild_address_pool();
// If we're not the very first master, this is a big issue!
- if(count>0)
+ if (count > 0)
LOG(0, 0, 0, "Warning: Fixed %d uninitialized sessions in becoming master!\n", count);
config->cluster_undefined_sessions = 0;
+ config->cluster_undefined_bundles = 0;
config->cluster_undefined_tunnels = 0;
config->cluster_iam_uptodate = 1; // assume all peers are up-to-date
- if (!num_peers) // lone master
- advertise();
-
// FIXME. We need to fix up the tunnel control message
// queue here! There's a number of other variables we
// should also update.
// we fix it up here, and we ensure that the 'first free session'
// pointer is valid.
//
-static void cluster_check_sessions(int highsession, int freesession_ptr, int hightunnel)
+static void cluster_check_sessions(int highsession, int freesession_ptr, int highbundle, int hightunnel)
{
int i;
if (config->cluster_iam_uptodate)
return;
- if (highsession > config->cluster_undefined_sessions && hightunnel > config->cluster_undefined_tunnels)
+ if (highsession > config->cluster_undefined_sessions && highbundle > config->cluster_undefined_bundles && hightunnel > config->cluster_undefined_tunnels)
return;
// Clear out defined sessions, counting the number of
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)
+
+ if (session[i].tunnel == T_UNDEF)
+ ++config->cluster_undefined_sessions;
+ }
+
+ // Clear out defined bundles, counting the number of
+ // undefs remaining.
+ config->cluster_undefined_bundles = 0;
+ for (i = 1 ; i < MAXBUNDLE; ++i) {
+ if (i > highbundle) {
+ if (bundle[i].state == BUNDLEUNDEF) bundle[i].state = BUNDLEFREE; // Defined.
continue;
- ++config->cluster_undefined_sessions;
+ }
+
+ if (bundle[i].state == BUNDLEUNDEF)
+ ++config->cluster_undefined_bundles;
}
// 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;
}
- if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels) {
- LOG(2, 0, 0, "Cleared undefined sessions/tunnels. %d sess (high %d), %d tunn (high %d)\n",
- config->cluster_undefined_sessions, highsession, config->cluster_undefined_tunnels, hightunnel);
+ if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels || config->cluster_undefined_bundles) {
+ LOG(2, 0, 0, "Cleared undefined sessions/bundles/tunnels. %d sess (high %d), %d bund (high %d), %d tunn (high %d)\n",
+ config->cluster_undefined_sessions, highsession, config->cluster_undefined_bundles, highbundle, config->cluster_undefined_tunnels, hightunnel);
return;
}
cluster_uptodate();
}
-static int hb_add_type(char **p, int type, int id)
+static int hb_add_type(uint8_t **p, int type, int id)
{
switch (type) {
case C_CSESSION: { // Compressed C_SESSION.
// Did we compress the full structure, and is the size actually
// reduced??
if ( (d - orig) == sizeof(sessiont) && size < sizeof(sessiont) ) {
- add_type(p, C_CSESSION, id, (char *) c, size);
+ add_type(p, C_CSESSION, id, c, size);
break;
}
// Failed to compress : Fall through.
}
- case C_SESSION: add_type(p, C_SESSION, id,
- (char *) &session[id], sizeof(sessiont));
+ case C_SESSION:
+ add_type(p, C_SESSION, id, (uint8_t *) &session[id], sizeof(sessiont));
+ break;
+
+ case C_CBUNDLE: { // Compressed C_BUNDLE
+ uint8_t c[sizeof(bundlet) * 2]; // Bigger than worst case.
+ uint8_t *d = (uint8_t *) &bundle[id];
+ uint8_t *orig = d;
+ int size;
+
+ size = rle_compress( &d, sizeof(bundlet), c, sizeof(c) );
+
+ // Did we compress the full structure, and is the size actually
+ // reduced??
+ if ( (d - orig) == sizeof(bundlet) && size < sizeof(bundlet) ) {
+ add_type(p, C_CBUNDLE, id, c, size);
+ break;
+ }
+ // Failed to compress : Fall through.
+ }
+
+ case C_BUNDLE:
+ add_type(p, C_BUNDLE, id, (uint8_t *) &bundle[id], sizeof(bundlet));
break;
case C_CTUNNEL: { // Compressed C_TUNNEL
}
// Failed to compress : Fall through.
}
- case C_TUNNEL: add_type(p, C_TUNNEL, id,
- (char *) &tunnel[id], sizeof(tunnelt));
+ case C_TUNNEL:
+ add_type(p, C_TUNNEL, id, (uint8_t *) &tunnel[id], sizeof(tunnelt));
break;
default:
LOG(0, 0, 0, "Found an invalid type in heart queue! (%d)\n", type);
//
void cluster_heartbeat()
{
- int i, count = 0, tcount = 0;
- char buff[MAX_HEART_SIZE + sizeof(heartt) + sizeof(int) ];
+ int i, count = 0, tcount = 0, bcount = 0;
+ uint8_t buff[MAX_HEART_SIZE + sizeof(heartt) + sizeof(int) ];
heartt h;
- char *p = buff;
+ uint8_t *p = buff;
if (!config->cluster_iam_master) // Only the master does this.
return;
h.highsession = config->cluster_highest_sessionid;
h.freesession = sessionfree;
h.hightunnel = config->cluster_highest_tunnelid;
+ h.highbundle = config->cluster_highest_bundleid;
h.size_sess = sizeof(sessiont); // Just in case.
+ h.size_bund = sizeof(bundlet);
h.size_tunn = sizeof(tunnelt);
h.interval = config->cluster_hb_interval;
h.timeout = config->cluster_hb_timeout;
h.table_version = config->cluster_table_version;
- add_type(&p, C_HEARTBEAT, HB_VERSION, (char *) &h, sizeof(h));
+ add_type(&p, C_HEARTBEAT, HB_VERSION, (uint8_t *) &h, sizeof(h));
for (i = 0; i < config->cluster_num_changes; ++i) {
hb_add_type(&p, cluster_changes[i].type, cluster_changes[i].id);
++tcount;
}
+ //
+ // Fill out the packet with bundles from the bundle table...
+ while ( (p + sizeof(uint32_t) * 2 + sizeof(bundlet) ) < (buff + MAX_HEART_SIZE) ) {
+
+ if (!walk_bundle_number) // bundle #0 isn't valid.
+ ++walk_bundle_number;
+
+ if (bcount >= config->cluster_highest_bundleid)
+ break;
+
+ hb_add_type(&p, C_CTUNNEL, walk_bundle_number);
+ walk_tunnel_number = (1+walk_bundle_number)%(config->cluster_highest_bundleid+1); // +1 avoids divide by zero.
+
+ ++bcount;
+ }
+
//
// Did we do something wrong?
if (p > (buff + sizeof(buff))) { // Did we somehow manage to overun the buffer?
}
LOG(3, 0, 0, "Sending v%d heartbeat #%d, change #%" PRIu64 " with %d changes "
- "(%d x-sess, %d x-tunnels, %d highsess, %d hightun, size %d)\n",
+ "(%d x-sess, %d x-bundles, %d x-tunnels, %d highsess, %d highbund, %d hightun, size %d)\n",
HB_VERSION, h.seq, h.table_version, config->cluster_num_changes,
- count, tcount, config->cluster_highest_sessionid,
+ count, bcount, tcount, config->cluster_highest_sessionid, config->cluster_highest_bundleid,
config->cluster_highest_tunnelid, (int) (p - buff));
config->cluster_num_changes = 0;
return -1;
}
+ if (forked) {
+ LOG(0, sid, 0, "cluster_send_session called from child process!\n");
+ return -1;
+ }
+
return type_changed(C_CSESSION, sid);
}
+// A particular bundle has been changed!
+int cluster_send_bundle(int bid)
+{
+ if (!config->cluster_iam_master) {
+ LOG(0, 0, bid, "I'm not a master, but I just tried to change a bundle!\n");
+ return -1;
+ }
+
+ return type_changed(C_CBUNDLE, bid);
+}
+
// A particular tunnel has been changed!
int cluster_send_tunnel(int tid)
{
int diff;
LOG(1, 0, 0, "Slave %s sent LASTSEEN with seq %d\n", fmtaddr(slave, 0), seq);
+ if (!config->cluster_iam_master) {
+ LOG(1, 0, 0, "Got LASTSEEN but I'm not a master! Redirecting it to %s.\n",
+ fmtaddr(config->cluster_master_address, 0));
+
+ peer_send_message(slave, C_MASTER, config->cluster_master_address, NULL, 0);
+ return 0;
+ }
diff = config->cluster_seq_number - seq; // How many packet do we need to send?
if (diff < 0)
return peer_send_message(slave, C_KILL, seq, NULL, 0);// Kill the slave. Nothing else to do.
}
+ LOG(1, 0, 0, "Sending %d catchup packets to slave %s\n", diff, fmtaddr(slave, 0) );
+
// Now resend every packet that it missed, in order.
while (seq != config->cluster_seq_number) {
- s = seq%HB_HISTORY_SIZE;
+ s = seq % HB_HISTORY_SIZE;
if (seq != past_hearts[s].seq) {
LOG(0, 0, 0, "Tried to re-send heartbeat for %s but %d doesn't match %d! (%d,%d)\n",
fmtaddr(slave, 0), seq, past_hearts[s].seq, s, config->cluster_seq_number);
}
// Is this the master shutting down??
- if (peer == config->cluster_master_address && !basetime) {
- LOG(3, 0, 0, "Master %s shutting down...\n", fmtaddr(config->cluster_master_address, 0));
+ if (peer == config->cluster_master_address) {
+ LOG(3, 0, 0, "Master %s %s\n", fmtaddr(config->cluster_master_address, 0),
+ basetime ? "has restarted!" : "shutting down...");
+
config->cluster_master_address = 0;
config->cluster_last_hb = 0; // Force an election.
cluster_check_master();
- return 0;
}
if (i >= num_peers)
return 1;
}
+// A slave responds with C_MASTER when it gets a message which should have gone to a master.
+static int cluster_set_master(in_addr_t peer, in_addr_t master)
+{
+ if (config->cluster_iam_master) // Sanity...
+ return 0;
+
+ LOG(3, 0, 0, "Peer %s set the master to %s...\n", fmtaddr(peer, 0),
+ fmtaddr(master, 1));
+
+ config->cluster_master_address = master;
+ if (master)
+ {
+ // catchup with new master
+ peer_send_message(master, C_LASTSEEN, config->cluster_seq_number, NULL, 0);
+
+ // delay next election
+ config->cluster_last_hb = TIME;
+ }
+
+ // run election (or reset "probed" if master was set)
+ cluster_check_master();
+ return 0;
+}
+
/* Handle the slave updating the byte counters for the master. */
//
// Note that we don't mark the session as dirty; We rely on
// the slow table walk to propogate this back out to the slaves.
//
-static int cluster_handle_bytes(char *data, int size)
+static int cluster_handle_bytes(uint8_t *data, int size)
{
bytest *b;
return -1; /* Abort processing */
}
- session[b->sid].total_cin += b->in;
- session[b->sid].total_cout += b->out;
+ session[b->sid].pin += b->pin;
+ session[b->sid].pout += b->pout;
+
+ increment_counter(&session[b->sid].cin, &session[b->sid].cin_wrap, b->cin);
+ increment_counter(&session[b->sid].cout, &session[b->sid].cout_wrap, b->cout);
+
+ session[b->sid].cin_delta += b->cin;
+ session[b->sid].cout_delta += b->cout;
- session[b->sid].cin += b->in;
- session[b->sid].cout += b->out;
- session[b->sid].last_packet = time_now; // Reset idle timer!
+ if (b->cin)
+ session[b->sid].last_packet = time_now; // Reset idle timer!
size -= sizeof(*b);
++b;
return 0;
}
+static int cluster_recv_bundle(int more, uint8_t *p)
+{
+ if (more >= MAXBUNDLE) {
+ LOG(0, 0, 0, "DANGER: Received a bundle id > MAXBUNDLE!\n");
+ return -1;
+ }
+
+ if (bundle[more].state == BUNDLEUNDEF) {
+ if (config->cluster_iam_uptodate) { // Sanity.
+ LOG(0, 0, 0, "I thought I was uptodate but I just found an undefined bundle!\n");
+ } else {
+ --config->cluster_undefined_bundles;
+ }
+ }
+
+ memcpy(&bundle[more], p, sizeof(bundle[more]) );
+
+ LOG(5, 0, more, "Received bundle update\n");
+
+ if (!config->cluster_iam_uptodate)
+ cluster_uptodate(); // Check to see if we're up to date.
+
+ return 0;
+}
+
static int cluster_recv_tunnel(int more, uint8_t *p)
{
if (more >= MAXTUNNEL) {
}
+// pre v5 heartbeat session structure
+struct oldsession {
+ sessionidt next;
+ sessionidt far;
+ tunnelidt tunnel;
+ in_addr_t ip;
+ int ip_pool_index;
+ unsigned long unique_id;
+ uint16_t nr;
+ uint16_t ns;
+ uint32_t magic;
+ uint32_t cin, cout;
+ uint32_t pin, pout;
+ uint32_t total_cin;
+ uint32_t total_cout;
+ uint32_t id;
+ uint16_t throttle_in;
+ uint16_t throttle_out;
+ clockt opened;
+ clockt die;
+ time_t last_packet;
+ in_addr_t dns1, dns2;
+ routet route[MAXROUTE];
+ uint16_t radius;
+ uint16_t mru;
+ uint16_t tbf_in;
+ uint16_t tbf_out;
+ uint8_t l2tp_flags;
+ uint8_t reserved_old_snoop;
+ uint8_t walled_garden;
+ uint8_t flags1;
+ char random_vector[MAXTEL];
+ int random_vector_length;
+ char user[129];
+ char called[MAXTEL];
+ char calling[MAXTEL];
+ uint32_t tx_connect_speed;
+ uint32_t rx_connect_speed;
+ uint32_t flags;
+#define SF_IPCP_ACKED 1 // Has this session seen an IPCP Ack?
+#define SF_LCP_ACKED 2 // LCP negotiated
+#define SF_CCP_ACKED 4 // CCP negotiated
+ in_addr_t snoop_ip;
+ uint16_t snoop_port;
+ uint16_t sid;
+ uint8_t filter_in;
+ uint8_t filter_out;
+ char reserved[18];
+};
+
+static uint8_t *convert_session(struct oldsession *old)
+{
+ static sessiont new;
+ int i;
+
+ memset(&new, 0, sizeof(new));
+
+ new.next = old->next;
+ new.far = old->far;
+ new.tunnel = old->tunnel;
+ new.flags = old->l2tp_flags;
+ new.ip = old->ip;
+ new.ip_pool_index = old->ip_pool_index;
+ new.unique_id = old->unique_id;
+ new.magic = old->magic;
+ new.pin = old->pin;
+ new.pout = old->pout;
+ new.cin = old->total_cin;
+ new.cout = old->total_cout;
+ new.cin_delta = old->cin;
+ new.cout_delta = old->cout;
+ new.throttle_in = old->throttle_in;
+ new.throttle_out = old->throttle_out;
+ new.filter_in = old->filter_in;
+ new.filter_out = old->filter_out;
+ new.mru = old->mru;
+ new.opened = old->opened;
+ new.die = old->die;
+ new.last_packet = old->last_packet;
+ new.dns1 = old->dns1;
+ new.dns2 = old->dns2;
+ new.tbf_in = old->tbf_in;
+ new.tbf_out = old->tbf_out;
+ new.random_vector_length = old->random_vector_length;
+ new.tx_connect_speed = old->tx_connect_speed;
+ new.rx_connect_speed = old->rx_connect_speed;
+ new.snoop_ip = old->snoop_ip;
+ new.snoop_port = old->snoop_port;
+ new.walled_garden = old->walled_garden;
+
+ memcpy(new.random_vector, old->random_vector, sizeof(new.random_vector));
+ memcpy(new.user, old->user, sizeof(new.user));
+ memcpy(new.called, old->called, sizeof(new.called));
+ memcpy(new.calling, old->calling, sizeof(new.calling));
+
+ for (i = 0; i < MAXROUTE; i++)
+ memcpy(&new.route[i], &old->route[i], sizeof(new.route[i]));
+
+ if (new.opened)
+ {
+ new.ppp.phase = Establish;
+ if (old->flags & (SF_IPCP_ACKED|SF_LCP_ACKED))
+ {
+ new.ppp.phase = Network;
+ new.ppp.lcp = Opened;
+ new.ppp.ipcp = (old->flags & SF_IPCP_ACKED) ? Opened : Starting;
+ new.ppp.ccp = (old->flags & SF_CCP_ACKED) ? Opened : Stopped;
+ }
+
+ // no PPPv6 in old session
+ new.ppp.ipv6cp = Stopped;
+ }
+
+ return (uint8_t *) &new;
+}
+
//
// Process a heartbeat..
//
// v3: added interval, timeout
// v4: added table_version
+// v5: added ipv6, re-ordered session structure
static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t *p, in_addr_t addr)
{
heartt *h;
int s = size - (p-data);
int i, type;
+ int hb_ver = more;
-#if HB_VERSION != 4
+#if HB_VERSION != 5
# error "need to update cluster_process_heartbeat()"
#endif
- // we handle versions 3 through 4
- if (more < 3 || more > HB_VERSION) {
- LOG(0, 0, 0, "Received a heartbeat version that I don't support (%d)!\n", more);
+ // we handle versions 3 through 5
+ if (hb_ver < 3 || hb_ver > HB_VERSION) {
+ LOG(0, 0, 0, "Received a heartbeat version that I don't support (%d)!\n", hb_ver);
return -1; // Ignore it??
}
return -1; // Skip it.
}
- if (more >= 4) {
+ if (hb_ver >= 4) {
if (h->table_version > config->cluster_table_version) {
LOG(0, 0, 0, "They've seen more state changes (%" PRIu64 " vs my %" PRIu64 ") so I'm gone!\n",
h->table_version, config->cluster_table_version);
exit(1);
}
+ //
+ // Send it a unicast heartbeat to see give it a chance to die.
+ // NOTE: It's actually safe to do seq-number - 1 without checking
+ // for wrap around.
+ //
+ cluster_catchup_slave(config->cluster_seq_number - 1, addr);
+
return -1; // Skip it.
}
+ //
+ // Try and guard against a stray master appearing.
+ //
+ // Ignore heartbeats received from another master before the
+ // timeout (less a smidgen) for the old master has elapsed.
+ //
+ // Note that after a clean failover, the cluster_master_address
+ // is cleared, so this doesn't run.
+ //
+ if (config->cluster_master_address && addr != config->cluster_master_address) {
+ LOG(0, 0, 0, "Ignoring stray heartbeat from %s, current master %s has not yet timed out (last heartbeat %.1f seconds ago).\n",
+ fmtaddr(addr, 0), fmtaddr(config->cluster_master_address, 1),
+ 0.1 * (TIME - config->cluster_last_hb));
+ return -1; // ignore
+ }
+
if (config->cluster_seq_number == -1) // Don't have one. Just align to the master...
config->cluster_seq_number = h->seq;
config->cluster_last_hb = TIME; // Reset to ensure that we don't become master!!
+ config->cluster_last_hb_ver = hb_ver; // remember what cluster version the master is using
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;
- peer_send_message(addr, C_LASTSEEN, config->cluster_seq_number, NULL, 0);
+ // limit to once per second for a particular seq#
+ int ask = (config->cluster_seq_number != lastseen_seq || time_now != lastseen_time);
+
+ 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!!
// Check that we don't have too many undefined sessions, and
// that the free session pointer is correct.
- cluster_check_sessions(h->highsession, h->freesession, h->hightunnel);
+ cluster_check_sessions(h->highsession, h->freesession, h->highbundle, h->hightunnel);
if (h->interval != config->cluster_hb_interval)
{
size = rle_decompress((uint8_t **) &p, s, c, sizeof(c) );
s -= (p - orig_p);
+ // session struct changed with v5
+ if (hb_ver < 5)
+ {
+ if (size != sizeof(struct oldsession)) {
+ LOG(0, 0, 0, "DANGER: Received a v%d CSESSION that didn't decompress correctly!\n", hb_ver);
+ // Now what? Should exit! No-longer up to date!
+ break;
+ }
+ cluster_recv_session(more, convert_session((struct oldsession *) c));
+ break;
+ }
+
if (size != sizeof(sessiont) ) { // Ouch! Very very bad!
LOG(0, 0, 0, "DANGER: Received a CSESSION that didn't decompress correctly!\n");
// Now what? Should exit! No-longer up to date!
break;
}
case C_SESSION:
+ if (hb_ver < 5)
+ {
+ if (s < sizeof(struct oldsession))
+ goto shortpacket;
+
+ cluster_recv_session(more, convert_session((struct oldsession *) p));
+
+ p += sizeof(struct oldsession);
+ s -= sizeof(struct oldsession);
+ break;
+ }
+
if ( s < sizeof(session[more]))
goto shortpacket;
s -= (p - orig_p);
if (size != sizeof(tunnelt) ) { // Ouch! Very very bad!
- LOG(0, 0, 0, "DANGER: Received a CSESSION that didn't decompress correctly!\n");
+ LOG(0, 0, 0, "DANGER: Received a CTUNNEL that didn't decompress correctly!\n");
// Now what? Should exit! No-longer up to date!
break;
}
p += sizeof(tunnel[more]);
s -= sizeof(tunnel[more]);
break;
+
+ case C_CBUNDLE: { // Compressed bundle structure.
+ uint8_t c[ sizeof(bundlet) + 2];
+ int size;
+ uint8_t *orig_p = p;
+
+ size = rle_decompress((uint8_t **) &p, s, c, sizeof(c));
+ s -= (p - orig_p);
+
+ if (size != sizeof(bundlet) ) { // Ouch! Very very bad!
+ LOG(0, 0, 0, "DANGER: Received a CBUNDLE that didn't decompress correctly!\n");
+ // Now what? Should exit! No-longer up to date!
+ break;
+ }
+
+ cluster_recv_bundle(more, c);
+ break;
+
+ }
+ case C_BUNDLE:
+ if ( s < sizeof(bundle[more]))
+ goto shortpacket;
+
+ cluster_recv_bundle(more, p);
+
+ p += sizeof(bundle[more]);
+ s -= sizeof(bundle[more]);
+ break;
default:
LOG(0, 0, 0, "DANGER: I received a heartbeat element where I didn't understand the type! (%d)\n", type);
return -1; // can't process any more of the packet!!
// We got a packet on the cluster port!
// Handle pings, lastseens, and heartbeats!
//
-int processcluster(char *data, int size, in_addr_t addr)
+int processcluster(uint8_t *data, int size, in_addr_t addr)
{
int type, more;
- char *p = data;
+ uint8_t *p = data;
int s = size;
if (addr == my_address)
p += sizeof(uint32_t);
s -= sizeof(uint32_t);
- switch (type) {
- case C_PING: // Update the peers table.
+ switch (type)
+ {
+ case C_PING: // Update the peers table.
return cluster_add_peer(addr, more, (pingt *) p, s);
- case C_LASTSEEN: // Catch up a slave (slave missed a packet).
- return cluster_catchup_slave(more, addr);
+ case C_MASTER: // Our master is wrong
+ return cluster_set_master(addr, more);
- case C_FORWARD: { // Forwarded control packet. pass off to processudp.
- struct sockaddr_in a;
- a.sin_addr.s_addr = more;
+ case C_LASTSEEN: // Catch up a slave (slave missed a packet).
+ return cluster_catchup_slave(more, addr);
- a.sin_port = *(int *) p;
- s -= sizeof(int);
- p += sizeof(int);
+ case C_FORWARD: // Forwarded control packet. pass off to processudp.
+ case C_FORWARD_DAE: // Forwarded DAE packet. pass off to processdae.
+ if (!config->cluster_iam_master)
+ {
+ LOG(0, 0, 0, "I'm not the master, but I got a C_FORWARD_%s from %s?\n",
+ type == C_FORWARD_DAE ? "_DAE" : "", fmtaddr(addr, 0));
- if (!config->cluster_iam_master) { // huh?
- LOG(0, 0, 0, "I'm not the master, but I got a C_FORWARD from %s?\n", fmtaddr(addr, 0));
return -1;
}
+ else
+ {
+ struct sockaddr_in a;
+ a.sin_addr.s_addr = more;
+
+ a.sin_port = *(int *) p;
+ s -= sizeof(int);
+ p += sizeof(int);
+
+ LOG(4, 0, 0, "Got a forwarded %spacket... (%s:%d)\n",
+ type == C_FORWARD_DAE ? "DAE " : "", fmtaddr(more, 0), a.sin_port);
+
+ STAT(recv_forward);
+ if (type == C_FORWARD_DAE)
+ {
+ struct in_addr local;
+ local.s_addr = config->bind_address ? config->bind_address : my_address;
+ processdae(p, s, &a, sizeof(a), &local);
+ }
+ else
+ processudp(p, s, &a);
+
+ return 0;
+ }
- LOG(4, 0, 0, "Got a forwarded packet... (%s:%d)\n", fmtaddr(more, 0), a.sin_port);
- STAT(recv_forward);
- processudp(p, s, &a);
- return 0;
- }
case C_THROTTLE: { // Receive a forwarded packet from a slave.
if (!config->cluster_iam_master) {
LOG(0, 0, 0, "I'm not the master, but I got a C_THROTTLE from %s?\n", fmtaddr(addr, 0));
return 0;
case C_BYTES:
+ if (!config->cluster_iam_master) {
+ LOG(0, 0, 0, "I'm not the master, but I got a C_BYTES from %s?\n", fmtaddr(addr, 0));
+ return -1;
+ }
+
return cluster_handle_bytes(p, s);
case C_KILL: // The master asked us to die!? (usually because we're too out of date).
: "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 bundles undefined of %d", config->cluster_undefined_bundles, config->cluster_highest_bundleid);
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 bundle : %d", config->cluster_highest_bundleid);
cli_print(cli, "Highest tunnel : %d", config->cluster_highest_tunnelid);
cli_print(cli, "%d changes queued for sending", config->cluster_num_changes);
}
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;
{
int count;
int orig_dsize = dsize;
- char *src = *src_p;
+ uint8_t *src = *src_p;
while (ssize >0 && dsize > 0) { // While there's more to decompress, and there's room in the decompress buffer...
count = *src++; --ssize; // get the count byte from the source.
projects / l2tpns.git / blobdiff