// L2TPNS Clustering Stuff
-char const *cvs_id_cluster = "$Id: cluster.c,v 1.21 2004/12/09 00:38:44 bodea Exp $";
+char const *cvs_id_cluster = "$Id: cluster.c,v 1.39 2005/05/26 12:17:30 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 "l2tpns.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.
-ipt my_address = 0; // The network address of my ethernet 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!
// we can re-transmit if needed.
static struct {
- u32 peer;
- time_t basetime;
- clockt timestamp;
- int uptodate;
+ in_addr_t peer;
+ uint32_t basetime;
+ clockt timestamp;
+ int uptodate;
} peers[CLUSTER_MAX_SIZE]; // List of all the peers we've heard from.
static int num_peers; // Number of peers in list.
-static int rle_decompress(u8 ** src_p, int ssize, u8 *dst, int dsize);
-static int rle_compress(u8 ** src_p, int ssize, u8 *dst, int dsize);
+static int rle_decompress(uint8_t **src_p, int ssize, uint8_t *dst, int dsize);
+static int rle_compress(uint8_t **src_p, int ssize, uint8_t *dst, int dsize);
//
// Create a listening socket
struct sockaddr_in interface_addr;
struct ip_mreq mreq;
struct ifreq ifr;
- int opt = 0;
+ int opt;
config->cluster_undefined_sessions = MAXSESSION-1;
config->cluster_undefined_tunnels = MAXTUNNEL-1;
addr.sin_addr.s_addr = INADDR_ANY;
setsockopt(cluster_sockfd, SOL_SOCKET, SO_REUSEADDR, &addr, sizeof(addr));
+ opt = fcntl(cluster_sockfd, F_GETFL, 0);
+ fcntl(cluster_sockfd, F_SETFL, opt | O_NONBLOCK);
+
if (bind(cluster_sockfd, (void *) &addr, sizeof(addr)) < 0)
{
LOG(0, 0, 0, "Failed to bind cluster socket: %s\n", strerror(errno));
return -1;
}
- if (setsockopt (cluster_sockfd, IPPROTO_IP, IP_MULTICAST_IF, &interface_addr, sizeof(interface_addr)) < 0)
+ if (setsockopt(cluster_sockfd, IPPROTO_IP, IP_MULTICAST_IF, &interface_addr, sizeof(interface_addr)) < 0)
{
LOG(0, 0, 0, "Failed to setsockopt (set mcast interface): %s\n", strerror(errno));
return -1;
// 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(char **p, int type, int more, char *data, int size)
{
- * ( (u32*)(*p) ) = type;
- *p += sizeof(u32);
+ *((uint32_t *) (*p)) = type;
+ *p += sizeof(uint32_t);
- * ( (u32*)(*p) ) = more;
- *p += sizeof(u32);
+ *((uint32_t *)(*p)) = more;
+ *p += sizeof(uint32_t);
if (data && size > 0) {
memcpy(*p, data, size);
- (*p) += size;
+ *p += size;
}
}
// 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)
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(u32 peer, char * data, int size)
+static int peer_send_data(in_addr_t peer, char *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(u32 peer, int type, int more, char * data, int size)
+static int peer_send_message(in_addr_t peer, int type, int more, char *data, int size)
{
char buf[65536]; // Vast overkill.
- char * p = buf;
+ char *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);
// The master just processes the payload as if it had
// received it off the tun device.
//
-int master_forward_packet(char *data, int size, u32 addr, int port)
+int master_forward_packet(char *data, int size, in_addr_t addr, int port)
{
char buf[65536]; // Vast overkill.
char *p = buf;
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, C_FORWARD, addr, (char *) &port, sizeof(port));
memcpy(p, data, size);
p += size;
- return peer_send_data(config->cluster_master_address, buf, (p-buf) );
-
+ return peer_send_data(config->cluster_master_address, buf, (p - buf));
}
//
// 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, char *data, int size)
{
int i;
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!
// 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, (char *) &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();
+ }
}
//
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)));
LOG(0, 0, 0, "Master timed out! Holding election...\n");
- for (i = 0; i < num_peers; i++)
+ 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
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;
++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_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.
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;
}
{
switch (type) {
case C_CSESSION: { // Compressed C_SESSION.
- u8 c[sizeof(sessiont) * 2]; // Bigger than worst case.
- u8 *d = (u8 *) &session[id];
- u8 *orig = d;
+ uint8_t c[sizeof(sessiont) * 2]; // Bigger than worst case.
+ uint8_t *d = (uint8_t *) &session[id];
+ uint8_t *orig = d;
int size;
size = rle_compress( &d, sizeof(sessiont), c, sizeof(c) );
// 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, (char *) c, size);
break;
}
// Failed to compress : Fall through.
}
case C_SESSION: add_type(p, C_SESSION, id,
- (char*) &session[id], sizeof(sessiont));
+ (char *) &session[id], sizeof(sessiont));
break;
case C_CTUNNEL: { // Compressed C_TUNNEL
- u8 c[sizeof(tunnelt) * 2]; // Bigger than worst case.
- u8 *d = (u8 *) &tunnel[id];
- u8 *orig = d;
+ uint8_t c[sizeof(tunnelt) * 2]; // Bigger than worst case.
+ uint8_t *d = (uint8_t *) &tunnel[id];
+ uint8_t *orig = d;
int size;
size = rle_compress( &d, sizeof(tunnelt), c, sizeof(c) );
// Failed to compress : Fall through.
}
case C_TUNNEL: add_type(p, C_TUNNEL, id,
- (char*) &tunnel[id], sizeof(tunnelt));
+ (char *) &tunnel[id], sizeof(tunnelt));
break;
default:
LOG(0, 0, 0, "Found an invalid type in heart queue! (%d)\n", type);
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, (char *) &h, sizeof(h));
for (i = 0; i < config->cluster_num_changes; ++i) {
hb_add_type(&p, cluster_changes[i].type, cluster_changes[i].id);
}
if (p > (buff + sizeof(buff))) { // Did we somehow manage to overun the buffer?
- LOG(0, 0, 0, "FATAL: Overran the heartbeat buffer! This is fatal. Exiting. (size %d)\n", p - buff);
+ LOG(0, 0, 0, "FATAL: Overran the heartbeat buffer! This is fatal. Exiting. (size %d)\n", (int) (p - buff));
kill(0, SIGTERM);
exit(1);
}
//
// Fill out the packet with sessions from the session table...
// (not forgetting to leave space so we can get some tunnels in too )
- while ( (p + sizeof(u32) * 2 + sizeof(sessiont) * 2 ) < (buff + MAX_HEART_SIZE) ) {
+ while ( (p + sizeof(uint32_t) * 2 + sizeof(sessiont) * 2 ) < (buff + MAX_HEART_SIZE) ) {
if (!walk_session_number) // session #0 isn't valid.
++walk_session_number;
// than the session table. This is good because stuffing up a
// tunnel is a much bigger deal than stuffing up a session.
//
- while ( (p + sizeof(u32) * 2 + sizeof(tunnelt) ) < (buff + MAX_HEART_SIZE) ) {
+ while ( (p + sizeof(uint32_t) * 2 + sizeof(tunnelt) ) < (buff + MAX_HEART_SIZE) ) {
if (!walk_tunnel_number) // tunnel #0 isn't valid.
++walk_tunnel_number;
//
// Did we do something wrong?
if (p > (buff + sizeof(buff))) { // Did we somehow manage to overun the buffer?
- LOG(0, 0, 0, "Overran the heartbeat buffer now! This is fatal. Exiting. (size %d)\n", p - buff);
+ LOG(0, 0, 0, "Overran the heartbeat buffer now! This is fatal. Exiting. (size %d)\n", (int) (p - buff));
kill(0, SIGTERM);
exit(1);
}
- LOG(3, 0, 0, "Sending v%d heartbeat #%d, change #%llu with %d changes "
+ 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",
HB_VERSION, h.seq, h.table_version, config->cluster_num_changes,
count, tcount, config->cluster_highest_sessionid,
- config->cluster_highest_tunnelid, (p-buff));
+ 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);
}
// missed a packet. We'll resend it every packet since
// the last one it's seen.
//
-static int cluster_catchup_slave(int seq, u32 slave)
+static int cluster_catchup_slave(int seq, in_addr_t slave)
{
int s;
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);
// We've heard from another peer! Add it to the list
// that we select from at election time.
//
-static int cluster_add_peer(u32 peer, time_t basetime, pingt *pp, int size)
+static int cluster_add_peer(in_addr_t peer, time_t basetime, pingt *pp, int size)
{
int i;
- u32 clusterid;
+ in_addr_t clusterid;
pingt p;
// Allow for backward compatability.
if (size > sizeof(p))
size = sizeof(p);
- memset( (void*) &p, 0, sizeof(p) );
- memcpy( (void*) &p, (void*) pp, size);
+ memset( (void *) &p, 0, sizeof(p) );
+ memcpy( (void *) &p, (void *) pp, size);
clusterid = p.addr;
if (clusterid != config->bind_address)
}
// 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 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;
+ 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(char *data, int size)
{
- bytest * b;
+ bytest *b;
- b = (bytest*) data;
+ b = (bytest *) data;
LOG(3, 0, 0, "Got byte counter update (size %d)\n", size);
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;
//
// Handle receiving a session structure in a heartbeat packet.
//
-static int cluster_recv_session(int more , u8 * p)
+static int cluster_recv_session(int more, uint8_t *p)
{
if (more >= MAXSESSION) {
LOG(0, 0, 0, "DANGER: Received a heartbeat session id > MAXSESSION!\n");
}
}
- load_session(more, (sessiont*) p); // Copy session into session table..
+ load_session(more, (sessiont *) p); // Copy session into session table..
LOG(5, more, 0, "Received session update (%d undef)\n", config->cluster_undefined_sessions);
return 0;
}
-static int cluster_recv_tunnel(int more, u8 *p)
+static int cluster_recv_tunnel(int more, uint8_t *p)
{
if (more >= MAXTUNNEL) {
LOG(0, 0, 0, "DANGER: Received a tunnel session id > MAXTUNNEL!\n");
}
+// 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;
+ 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.l2tp_flags = old->l2tp_flags;
+ new.flags = old->flags;
+ new.ip = old->ip;
+ new.ip_pool_index = old->ip_pool_index;
+ new.unique_id = old->unique_id;
+ new.nr = old->nr;
+ new.ns = old->ns;
+ new.magic = old->magic;
+ new.cin = old->cin;
+ new.cout = old->cout;
+ new.pin = old->pin;
+ new.pout = old->pout;
+ new.total_cin = old->total_cin;
+ new.total_cout = old->total_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]));
+
+ return (uint8_t *) &new;
+}
+
//
// Process a heartbeat..
//
// v3: added interval, timeout
// v4: added table_version
-static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32 addr)
+// 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;
+ 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??
}
if (s < sizeof(*h))
goto shortpacket;
- h = (heartt*) p;
+ h = (heartt *) p;
p += sizeof(*h);
s -= sizeof(*h);
LOG(0, 0, 0, "Heartbeat with zero basetime! Ignoring\n");
return -1; // Skip it.
}
- if (more >= 4 && h->table_version > config->cluster_table_version) {
- LOG(0, 0, 0, "They've seen more state changes (%llu vs my %llu) so I'm gone!\n",
- h->table_version, config->cluster_table_version);
- kill(0, SIGTERM);
- exit(1);
+ 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);
+
+ kill(0, SIGTERM);
+ exit(1);
+ }
+ if (h->table_version < config->cluster_table_version)
+ return -1;
}
+
if (basetime > h->basetime) {
LOG(0, 0, 0, "They're an older master than me so I'm gone!\n");
kill(0, SIGTERM);
exit(1);
}
- if (basetime == h->basetime && my_address < addr) { // Tie breaker.
+
+ if (basetime < h->basetime)
+ return -1;
+
+ if (my_address < addr) { // Tie breaker.
LOG(0, 0, 0, "They're a higher IP address than me, so I'm gone!\n");
kill(0, SIGTERM);
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
+ && (config->cluster_last_hb + config->cluster_hb_timeout - 11) > TIME) {
+ 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!!
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!!
// Ok. process the packet...
while ( s > 0) {
- type = * ((u32*) p);
- p += sizeof(u32);
- s -= sizeof(u32);
+ type = *((uint32_t *) p);
+ p += sizeof(uint32_t);
+ s -= sizeof(uint32_t);
- more = * ((u32*) p);
- p += sizeof(u32);
- s -= sizeof(u32);
+ more = *((uint32_t *) p);
+ p += sizeof(uint32_t);
+ s -= sizeof(uint32_t);
switch (type) {
case C_CSESSION: { // Compressed session structure.
- u8 c [ sizeof(sessiont) + 2];
+ uint8_t c[ sizeof(sessiont) + 2];
int size;
- u8 * orig_p = p;
+ uint8_t *orig_p = p;
- size = rle_decompress((u8 **) &p, s, c, sizeof(c) );
+ 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;
break;
case C_CTUNNEL: { // Compressed tunnel structure.
- u8 c [ sizeof(tunnelt) + 2];
+ uint8_t c[ sizeof(tunnelt) + 2];
int size;
- u8 * orig_p = p;
+ uint8_t *orig_p = p;
- size = rle_decompress( (u8 **) &p, s, c, sizeof(c) );
+ size = rle_decompress((uint8_t **) &p, s, c, sizeof(c));
s -= (p - orig_p);
if (size != sizeof(tunnelt) ) { // Ouch! Very very bad!
// We got a packet on the cluster port!
// Handle pings, lastseens, and heartbeats!
//
-int processcluster(char * data, int size, u32 addr)
+int processcluster(char *data, int size, in_addr_t addr)
{
int type, more;
- char * p = data;
+ char *p = data;
int s = size;
if (addr == my_address)
if (s < 8)
goto shortpacket;
- type = * ((u32*) p);
- p += sizeof(u32);
- s -= sizeof(u32);
+ type = *((uint32_t *) p);
+ p += sizeof(uint32_t);
+ s -= sizeof(uint32_t);
- more = * ((u32*) p);
- p += sizeof(u32);
- s -= sizeof(u32);
+ more = *((uint32_t *) p);
+ p += sizeof(uint32_t);
+ s -= sizeof(uint32_t);
switch (type) {
- case C_PING: // Update the peers table.
- return cluster_add_peer(addr, more, (pingt*)p, s);
+ 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).
+ case C_MASTER: // Our master is wrong
+ return cluster_set_master(addr, more);
+
+ case C_LASTSEEN: // Catch up a slave (slave missed a packet).
return cluster_catchup_slave(more, addr);
case C_FORWARD: { // Forwarded control packet. pass off to processudp.
struct sockaddr_in a;
a.sin_addr.s_addr = more;
- a.sin_port = * (int*) p;
+ a.sin_port = *(int *) p;
s -= sizeof(int);
p += sizeof(int);
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 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;
//
// Worst case is a 50% expansion in space required (trying to
// compress { 0x00, 0x01 } * N )
-static int rle_compress(u8 ** src_p, int ssize, u8 *dst, int dsize)
+static int rle_compress(uint8_t **src_p, int ssize, uint8_t *dst, int dsize)
{
int count;
int orig_dsize = dsize;
- u8 * x,*src;
+ uint8_t *x, *src;
src = *src_p;
while (ssize > 0 && dsize > 2) {
// Return the number of dst bytes used.
// Updates the 'src_p' pointer to point to the
// first un-used byte.
-static int rle_decompress(u8 ** src_p, int ssize, u8 *dst, int dsize)
+static int rle_decompress(uint8_t **src_p, int ssize, uint8_t *dst, int dsize)
{
int count;
int orig_dsize = dsize;
- char * src = *src_p;
+ char *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