+//
+// This joins the cluster multi-cast group.
+//
+int cluster_init()
+{
+ struct sockaddr_in addr;
+ struct sockaddr_in interface_addr;
+ struct ip_mreq mreq;
+ struct ifreq ifr;
+ int opt;
+
+ config->cluster_undefined_sessions = MAXSESSION-1;
+ config->cluster_undefined_bundles = MAXBUNDLE-1;
+ config->cluster_undefined_tunnels = MAXTUNNEL-1;
+ config->cluster_undefined_groupes = MAXGROUPE-1;
+
+ if (!config->cluster_address)
+ return 0;
+ if (!*config->cluster_interface)
+ return 0;
+
+ cluster_sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(CLUSTERPORT);
+ 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;
+ }
+
+ strcpy(ifr.ifr_name, config->cluster_interface);
+ if (ioctl(cluster_sockfd, SIOCGIFADDR, &ifr) < 0)
+ {
+ LOG(0, 0, 0, "Failed to get interface address for (%s): %s\n", config->cluster_interface, strerror(errno));
+ return -1;
+ }
+
+ memcpy(&interface_addr, &ifr.ifr_addr, sizeof(interface_addr));
+ my_address = interface_addr.sin_addr.s_addr;
+
+ // Join multicast group.
+ mreq.imr_multiaddr.s_addr = config->cluster_address;
+ mreq.imr_interface = interface_addr.sin_addr;
+
+
+ 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));
+ return -1;
+ }
+
+ 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;
+ }
+
+ config->cluster_last_hb = TIME;
+ config->cluster_seq_number = -1;
+
+ return cluster_sockfd;
+}
+
+
+//
+// Send a chunk of data to the entire cluster (usually via the multicast
+// address ).
+//
+
+static int cluster_send_data(void *data, int datalen)
+{
+ struct sockaddr_in addr = {0};
+
+ if (!cluster_sockfd) return -1;
+ if (!config->cluster_address) return 0;
+
+ addr.sin_addr.s_addr = config->cluster_address;
+ addr.sin_port = htons(CLUSTERPORT);
+ addr.sin_family = AF_INET;
+
+ LOG(5, 0, 0, "Cluster send data: %d bytes\n", datalen);
+
+ if (sendto(cluster_sockfd, data, datalen, MSG_NOSIGNAL, (void *) &addr, sizeof(addr)) < 0)
+ {
+ LOG(0, 0, 0, "sendto: %s\n", strerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+//
+// Add a chunk of data to a heartbeat packet.
+// Maintains the format. Assumes that the caller
+// has passed in a big enough buffer!
+//
+static void add_type(uint8_t **p, int type, int more, uint8_t *data, int size)
+{
+ *((uint32_t *) (*p)) = type;
+ *p += sizeof(uint32_t);
+
+ *((uint32_t *)(*p)) = more;
+ *p += sizeof(uint32_t);
+
+ if (data && size > 0) {
+ memcpy(*p, data, size);
+ *p += size;
+ }
+}
+
+// advertise our presence via BGP or gratuitous ARP
+static void advertise_routes(void)
+{
+#ifdef BGP
+ if (bgp_configured)
+ bgp_enable_routing(1);
+ else
+#endif /* BGP */
+ if (config->send_garp)
+ 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 ||
+ config->cluster_undefined_bundles || config->cluster_undefined_groupes)
+ return;
+
+ config->cluster_iam_uptodate = 1;
+
+ LOG(0, 0, 0, "Now uptodate with master.\n");
+ advertise_routes();
+}
+
+//
+// Send a unicast UDP packet to a peer with 'data' as the
+// contents.
+//
+static int peer_send_data(in_addr_t peer, uint8_t *data, int size)
+{
+ struct sockaddr_in addr = {0};
+
+ if (!cluster_sockfd) return -1;
+ if (!config->cluster_address) return 0;
+
+ if (!peer) // Odd??
+ return -1;
+
+ addr.sin_addr.s_addr = peer;
+ addr.sin_port = htons(CLUSTERPORT);
+ addr.sin_family = AF_INET;
+
+ LOG_HEX(5, "Peer send", data, size);
+
+ if (sendto(cluster_sockfd, data, size, MSG_NOSIGNAL, (void *) &addr, sizeof(addr)) < 0)
+ {
+ LOG(0, 0, 0, "sendto: %s\n", strerror(errno));
+ return -1;
+ }
+
+ return 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, uint8_t *data, int size)
+{
+ 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) );
+}
+
+// send a packet to the master
+static int _forward_packet(uint8_t *data, int size, in_addr_t addr, int port, int type)
+{
+ 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, 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.
+//(note: THIS ROUTINE WRITES TO pack[-6]).
+int master_forward_packet(uint8_t *data, int size, in_addr_t addr, uint16_t port, uint16_t indexudp)
+{
+ uint8_t *p = data - (3 * sizeof(uint32_t));
+ uint8_t *psave = p;
+ uint32_t indexandport = port | ((indexudp << 16) & 0xFFFF0000);
+
+ 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, (uint8_t *) &indexandport, sizeof(indexandport));
+
+ return peer_send_data(config->cluster_master_address, psave, size + (3 * sizeof(uint32_t)));
+}
+
+// Forward PPPOE packet to the master.
+//(note: THIS ROUTINE WRITES TO pack[-4]).
+int master_forward_pppoe_packet(uint8_t *data, int size, uint8_t codepad)
+{
+ uint8_t *p = data - (2 * sizeof(uint32_t));
+ uint8_t *psave = p;
+
+ if (!config->cluster_master_address) // No election has been held yet. Just skip it.
+ return -1;
+
+ LOG(4, 0, 0, "Forward PPPOE packet to master, code %s (size %d)\n", get_string_codepad(codepad), size);
+
+ STAT(c_forwarded);
+ add_type(&p, C_PPPOE_FORWARD, codepad, NULL, 0);
+
+ return peer_send_data(config->cluster_master_address, psave, size + (2 * sizeof(uint32_t)));
+}
+
+// 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.
+//
+// The master just drops the packet into the appropriate
+// token bucket queue, and lets normal processing take care
+// of it.
+//
+int master_throttle_packet(int tbfid, uint8_t *data, int size)
+{
+ 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, "Throttling packet master (size %d, tbfid %d)\n", size, tbfid);
+
+ add_type(&p, C_THROTTLE, tbfid, data, size);
+
+ return peer_send_data(config->cluster_master_address, buf, (p-buf) );
+
+}
+
+//
+// Forward a walled garden packet to the master for handling.
+//
+// The master just writes the packet straight to the tun
+// device (where is will normally loop through the
+// firewall rules, and come back in on the tun device)
+//
+// (Note that this must be called with the tun header
+// as the start of the data).
+int master_garden_packet(sessionidt s, uint8_t *data, int size)
+{
+ 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, "Walled garden packet to master (size %d)\n", size);
+
+ add_type(&p, C_GARDEN, s, data, size);
+
+ return peer_send_data(config->cluster_master_address, buf, (p-buf));
+
+}
+
+//
+// Forward a MPPP packet to the master for handling.
+//
+// (Note that this must be called with the tun header
+// as the start of the data).
+// (i.e. this routine writes to data[-8]).
+int master_forward_mppp_packet(sessionidt s, uint8_t *data, int size)
+{
+ uint8_t *p = data - (2 * sizeof(uint32_t));
+ uint8_t *psave = p;
+
+ if (!config->cluster_master_address) // No election has been held yet. Just skip it.
+ return -1;
+
+ LOG(4, 0, 0, "Forward MPPP packet to master (size %d)\n", size);
+
+ add_type(&p, C_MPPP_FORWARD, s, NULL, 0);
+
+ return peer_send_data(config->cluster_master_address, psave, size + (2 * sizeof(uint32_t)));
+
+}
+
+//
+// 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, uint8_t *data, int size)
+{
+ int i;
+
+ if (size > sizeof(past_hearts[0].data))
+ {
+ LOG(0, 0, 0, "Tried to heartbeat something larger than the maximum packet!\n");
+ kill(0, SIGTERM);
+ exit(1);
+ }
+ i = seq % HB_HISTORY_SIZE;
+ past_hearts[i].seq = seq;
+ past_hearts[i].size = size;
+ memcpy(&past_hearts[i].data, data, size); // Save it.
+ cluster_send_data(data, size);
+}
+
+//
+// Send an 'i am alive' message to every machine in the cluster.
+//
+void cluster_send_ping(time_t basetime)
+{
+ 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.
+ return;
+
+ LOG(5, 0, 0, "Sending cluster ping...\n");
+
+ x.ver = 1;
+ x.addr = config->bind_address;
+ x.undef = config->cluster_undefined_sessions + config->cluster_undefined_tunnels +
+ config->cluster_undefined_groupes + config->cluster_undefined_bundles;
+ x.basetime = basetime;
+
+ add_type(&p, C_PING, basetime, (uint8_t *) &x, sizeof(x));
+ cluster_send_data(buff, (p-buff) );
+}
+
+//
+// Walk the session counters looking for non-zero ones to send
+// to the master. We send up to 600 of them at one time.
+// We examine a maximum of 3000 sessions.
+// (50k max session should mean that we normally
+// examine the entire session table every 25 seconds).
+
+#define MAX_B_RECS (600)
+void master_update_counts(void)
+{
+ int i, c;
+ bytest b[MAX_B_RECS+1];
+
+ 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.
+ return;
+
+ i = MAX_B_RECS * 5; // Examine max 3000 sessions;
+ if (config->cluster_highest_sessionid > i)
+ i = config->cluster_highest_sessionid;
+
+ for ( c = 0; i > 0 ; --i) {
+ // Next session to look at.
+ walk_session_number++;
+ if ( walk_session_number > config->cluster_highest_sessionid)
+ walk_session_number = 1;
+
+ 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].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_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!
+ return;
+
+
+ // 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, (uint8_t *) &b, sizeof(b[0]) * c);
+ return;
+}
+
+//
+// On the master, check how our slaves are going. If
+// one of them's not up-to-date we'll heartbeat faster.
+// If we don't have any of them, then we need to turn
+// on our own packet handling!
+//
+void cluster_check_slaves(void)
+{
+ int i;
+ static int have_peers = 0;
+ int had_peers = have_peers;
+ clockt t = TIME;
+
+ if (!config->cluster_iam_master)
+ return; // Only runs on the master...
+
+ config->cluster_iam_uptodate = 1; // cleared in loop below
+
+ for (i = have_peers = 0; i < num_peers; i++)
+ {
+ if ((peers[i].timestamp + config->cluster_hb_timeout) < t)
+ continue; // Stale peer! Skip them.
+
+ if (!peers[i].basetime)
+ continue; // Shutdown peer! Skip them.
+
+ if (peers[i].uptodate)
+ have_peers++;
+ else
+ config->cluster_iam_uptodate = 0; // Start fast heartbeats
+ }
+
+ // 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();
+ }
+}
+
+//
+// Check that we have a master. If it's been too
+// long since we heard from a master then hold an election.
+//
+void cluster_check_master(void)
+{
+ int i, count, 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 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 (config->cluster_master_address
+ && TIME > (config->cluster_last_hb + 2 * config->cluster_hb_interval + 11))
+ {
+ if (!probed || (TIME > (probed + 2 * config->cluster_hb_interval)))
+ {
+ probed = TIME;
+ LOG(1, 0, 0, "Heartbeat from master %.1fs late, probing...\n",
+ 0.1 * (TIME - (config->cluster_last_hb + config->cluster_hb_interval)));
+
+ peer_send_message(config->cluster_master_address,
+ C_LASTSEEN, config->cluster_seq_number, NULL, 0);
+ }
+ } else { // We got a recent heartbeat; reset the probe flag.
+ probed = 0;
+ }
+
+ if (TIME < (config->cluster_last_hb + config->cluster_hb_timeout))
+ 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");
+
+ // 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.
+
+ if (!peers[i].basetime)
+ continue; // Shutdown peer! Skip them.
+
+ if (peers[i].basetime < basetime) {
+ LOG(1, 0, 0, "Expecting %s to become master\n", fmtaddr(peers[i].peer, 0));
+ return; // They'll win the election. Get out of here.
+ }
+
+ if (peers[i].basetime == basetime &&
+ peers[i].peer > my_address) {
+ 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
+ // and I'm better than an of my peers so it's time
+ // to become a master!!!
+
+ config->cluster_iam_master = 1;
+ pppoe_send_garp(); // gratuitous arp of the pppoe interface
+
+ 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;
+
+ //
+ // Go through and mark all the tunnels as defined.
+ // Count the highest used tunnel number as well.
+ //
+ config->cluster_highest_tunnelid = 0;
+ for (i = 0; i < MAXTUNNEL; ++i) {
+ if (tunnel[i].state == TUNNELUNDEF)
+ tunnel[i].state = TUNNELFREE;
+
+ if (tunnel[i].state != TUNNELFREE && i > config->cluster_highest_tunnelid)
+ 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; 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 groupes as defined.
+ // Count the highest used groupe number as well.
+ //
+ config->cluster_highest_groupeid = 0;
+ for (i = 0; i < MAXGROUPE; ++i)
+ {
+ if (grpsession[i].state == GROUPEUNDEF)
+ grpsession[i].state = GROUPEFREE;
+
+ if (grpsession[i].state != GROUPEFREE && i > config->cluster_highest_groupeid)
+ config->cluster_highest_groupeid = i;
+ }
+
+ //
+ // Go through and mark all the sessions as being defined.
+ // reset the idle timeouts.
+ // add temporary byte counters to permanent ones.
+ // Re-string the free list.
+ // Find the ID of the highest session.
+ last_free = 0;
+ high_unique_id = 0;
+ config->cluster_highest_sessionid = 0;
+ for (i = 0, count = 0; i < MAXSESSION; ++i) {
+ if (session[i].tunnel == T_UNDEF) {
+ session[i].tunnel = T_FREE;
+ ++count;
+ }
+
+ 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 idle timeouts..
+ session[i].last_packet = session[i].last_data = 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/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_local[i].cin = sess_local[i].cout = 0;
+ sess_local[i].pin = sess_local[i].pout = 0;
+
+ 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);
+
+ 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.
+
+ become_master();
+
+ rebuild_address_pool();
+
+ // If we're not the very first master, this is a big issue!
+ 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_undefined_groupes = 0;
+ config->cluster_iam_uptodate = 1; // assume all peers are up-to-date
+
+ // FIXME. We need to fix up the tunnel control message
+ // queue here! There's a number of other variables we
+ // should also update.
+}
+
+
+//
+// Check that our session table is validly matching what the
+// master has in mind.
+//
+// In particular, if we have too many sessions marked 'undefined'
+// 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 highbundle, int hightunnel, int highgroupe)
+{
+ int i;
+
+ sessionfree = freesession_ptr; // Keep the freesession ptr valid.
+
+ if (config->cluster_iam_uptodate)
+ return;
+
+ if (highsession > config->cluster_undefined_sessions && highbundle > config->cluster_undefined_bundles &&
+ highgroupe > config->cluster_undefined_groupes && hightunnel > config->cluster_undefined_tunnels)
+ return;
+
+ // Clear out defined sessions, counting the number of
+ // undefs remaining.
+ config->cluster_undefined_sessions = 0;
+ for (i = 1 ; i < MAXSESSION; ++i) {
+ if (i > highsession) {
+ if (session[i].tunnel == T_UNDEF) session[i].tunnel = T_FREE; // Defined.
+ continue;
+ }
+
+ 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;
+ }
+
+ if (bundle[i].state == BUNDLEUNDEF)
+ ++config->cluster_undefined_bundles;
+ }
+
+ // Clear out defined tunnels, counting the number of
+ // undefs remaining.
+ config->cluster_undefined_tunnels = 0;
+ for (i = 1 ; i < MAXTUNNEL; ++i) {
+ if (i > hightunnel) {
+ if (tunnel[i].state == TUNNELUNDEF) tunnel[i].state = TUNNELFREE; // Defined.
+ continue;
+ }
+
+ if (tunnel[i].state == TUNNELUNDEF)
+ ++config->cluster_undefined_tunnels;
+ }
+
+ // Clear out defined groupe, counting the number of
+ // undefs remaining.
+ config->cluster_undefined_groupes = 0;
+ for (i = 1 ; i < MAXGROUPE; ++i) {
+ if (i > highgroupe) {
+ if (grpsession[i].state == GROUPEUNDEF) grpsession[i].state = GROUPEFREE; // Defined.
+ continue;
+ }
+
+ if (grpsession[i].state == GROUPEUNDEF)
+ ++config->cluster_undefined_groupes;
+ }
+
+ if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels || config->cluster_undefined_bundles || config->cluster_undefined_groupes) {
+ LOG(2, 0, 0, "Cleared undefined sessions/bundles/tunnels. %d sess (high %d), %d bund (high %d), %d grp (high %d), %d tunn (high %d)\n",
+ config->cluster_undefined_sessions, highsession, config->cluster_undefined_bundles, highbundle,
+ config->cluster_undefined_groupes, highgroupe, config->cluster_undefined_tunnels, hightunnel);
+ return;
+ }
+
+ // Are we up to date?
+
+ if (!config->cluster_iam_uptodate)
+ cluster_uptodate();
+}
+
+static int hb_add_type(uint8_t **p, int type, int id)
+{
+ switch (type) {
+ case C_CSESSION: { // Compressed C_SESSION.
+ 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, c, size);
+ break;
+ }
+ // Failed to compress : Fall through.
+ }
+ 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_CGROUPE: { // Compressed C_GROUPE
+ uint8_t c[sizeof(groupsesst) * 2]; // Bigger than worst case.
+ uint8_t *d = (uint8_t *) &grpsession[id];
+ uint8_t *orig = d;
+ int size;
+
+ size = rle_compress( &d, sizeof(groupsesst), c, sizeof(c) );
+
+ // Did we compress the full structure, and is the size actually
+ // reduced??
+ if ( (d - orig) == sizeof(groupsesst) && size < sizeof(groupsesst) )
+ {
+ add_type(p, C_CGROUPE, id, c, size);
+ break;
+ }
+ // Failed to compress : Fall through.
+ }
+ case C_GROUPE:
+ add_type(p, C_GROUPE, id, (uint8_t *) &grpsession[id], sizeof(groupsesst));
+ break;
+
+ case C_CTUNNEL: { // Compressed C_TUNNEL
+ 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) );
+
+ // Did we compress the full structure, and is the size actually
+ // reduced??
+ if ( (d - orig) == sizeof(tunnelt) && size < sizeof(tunnelt) ) {
+ add_type(p, C_CTUNNEL, id, c, size);
+ break;
+ }
+ // Failed to compress : Fall through.
+ }
+ 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);
+ kill(0, SIGTERM);
+ exit(1);
+ }
+ return 0;
+}
+
+//
+// Send a heartbeat, incidently sending out any queued changes..
+//
+void cluster_heartbeat()
+{
+ int i, count = 0, tcount = 0, bcount = 0, gcount = 0;
+ uint8_t buff[MAX_HEART_SIZE + sizeof(heartt) + sizeof(int) ];
+ heartt h;
+ uint8_t *p = buff;
+
+ if (!config->cluster_iam_master) // Only the master does this.
+ return;
+
+ config->cluster_table_version += config->cluster_num_changes;
+
+ // Fill out the heartbeat header.
+ memset(&h, 0, sizeof(h));
+
+ h.version = HB_VERSION;
+ h.seq = config->cluster_seq_number;
+ h.basetime = basetime;
+ h.clusterid = config->bind_address; // Will this do??
+ h.basetime = basetime;
+ h.highsession = config->cluster_highest_sessionid;
+ h.freesession = sessionfree;
+ h.hightunnel = config->cluster_highest_tunnelid;
+ h.highbundle = config->cluster_highest_bundleid;
+ h.highgroupe = config->cluster_highest_groupeid;
+ h.size_sess = sizeof(sessiont); // Just in case.
+ h.size_bund = sizeof(bundlet);
+ h.size_tunn = sizeof(tunnelt);
+ h.nextgrpid = gnextgrpid;
+ 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, (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);
+ }
+
+ 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", (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,bundle,groupe in too )
+ 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;
+
+ if (count >= config->cluster_highest_sessionid) // If we're a small cluster, don't go wild.
+ break;
+
+ hb_add_type(&p, C_CSESSION, walk_session_number);
+ walk_session_number = (1+walk_session_number)%(config->cluster_highest_sessionid+1); // +1 avoids divide by zero.
+
+ ++count; // Count the number of extra sessions we're sending.
+ }
+
+ //
+ // Fill out the packet with tunnels from the tunnel table...
+ // This effectively means we walk the tunnel table more quickly
+ // than the session table. This is good because stuffing up a
+ // tunnel is a much bigger deal than stuffing up a session.
+ //
+ int maxsize = (sizeof(tunnelt) < sizeof(bundlet)) ? sizeof(bundlet):sizeof(tunnelt);
+ maxsize = (sizeof(groupsesst) < maxsize) ? maxsize:sizeof(groupsesst);
+ maxsize += (sizeof(uint32_t) * 2);
+
+ // Fill out the packet with tunnels,bundlets, groupes from the tables...
+ while ( (p + maxsize) < (buff + MAX_HEART_SIZE) )
+ {
+ if ((tcount >= config->cluster_highest_tunnelid) &&
+ (bcount >= config->cluster_highest_bundleid) &&
+ (gcount >= config->cluster_highest_groupeid))
+ break;
+
+ if ( ((p + sizeof(uint32_t) * 2 + sizeof(tunnelt) ) < (buff + MAX_HEART_SIZE)) &&
+ (tcount < config->cluster_highest_tunnelid))
+ {
+ if (!walk_tunnel_number) // tunnel #0 isn't valid.
+ ++walk_tunnel_number;
+
+ hb_add_type(&p, C_CTUNNEL, walk_tunnel_number);
+ walk_tunnel_number = (1+walk_tunnel_number)%(config->cluster_highest_tunnelid+1); // +1 avoids divide by zero.
+
+ ++tcount;
+ }
+
+ if ( ((p + sizeof(uint32_t) * 2 + sizeof(bundlet) ) < (buff + MAX_HEART_SIZE)) &&
+ (bcount < config->cluster_highest_bundleid))
+ {
+ if (!walk_bundle_number) // bundle #0 isn't valid.
+ ++walk_bundle_number;
+
+ hb_add_type(&p, C_CBUNDLE, walk_bundle_number);
+ walk_bundle_number = (1+walk_bundle_number)%(config->cluster_highest_bundleid+1); // +1 avoids divide by zero.
+
+ ++bcount;
+ }
+
+ if ( ((p + sizeof(uint32_t) * 2 + sizeof(groupsesst) ) < (buff + MAX_HEART_SIZE)) &&
+ (gcount < config->cluster_highest_groupeid))
+ {
+ if (!walk_groupe_number) // groupe #0 isn't valid.
+ ++walk_groupe_number;
+
+ hb_add_type(&p, C_CGROUPE, walk_groupe_number);
+ walk_groupe_number = (1+walk_groupe_number)%(config->cluster_highest_groupeid+1); // +1 avoids divide by zero.
+ ++gcount;
+ }
+ }
+
+ //
+ // 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", (int) (p - buff));
+ kill(0, SIGTERM);
+ exit(1);
+ }
+
+ LOG(4, 0, 0, "Sending v%d heartbeat #%d, change #%" PRIu64 " with %d changes "
+ "(%d x-sess, %d x-bundles, %d x-tunnels, %d x-groupes, %d highsess, %d highbund, %d hightun, %d highgrp, size %d)\n",
+ HB_VERSION, h.seq, h.table_version, config->cluster_num_changes,
+ count, bcount, tcount, gcount, config->cluster_highest_sessionid, config->cluster_highest_bundleid,
+ config->cluster_highest_tunnelid, config->cluster_highest_groupeid, (int) (p - buff));
+
+ config->cluster_num_changes = 0;
+
+ send_heartbeat(h.seq, buff, (p-buff) ); // Send out the heartbeat to the cluster, keeping a copy of it.
+
+ config->cluster_seq_number = (config->cluster_seq_number+1)%HB_MAX_SEQ; // Next seq number to use.
+}
+
+//
+// A structure of type 'type' has changed; Add it to the queue to send.
+//
+static int type_changed(int type, int id)
+{
+ int i;
+
+ for (i = 0 ; i < config->cluster_num_changes ; ++i)
+ {
+ if ( cluster_changes[i].id == id && cluster_changes[i].type == type)
+ {
+ // Already marked for change, remove it
+ --config->cluster_num_changes;
+ memmove(&cluster_changes[i],
+ &cluster_changes[i+1],
+ (config->cluster_num_changes - i) * sizeof(cluster_changes[i]));
+ break;
+ }
+ }
+
+ cluster_changes[config->cluster_num_changes].type = type;
+ cluster_changes[config->cluster_num_changes].id = id;
+ ++config->cluster_num_changes;
+
+ if (config->cluster_num_changes > MAX_CHANGES)
+ cluster_heartbeat(); // flush now
+
+ return 1;
+}
+
+// A particular session has been changed!
+int cluster_send_session(int sid)
+{
+ if (!config->cluster_iam_master) {
+ LOG(0, sid, 0, "I'm not a master, but I just tried to change a session!\n");
+ 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 groupe has been changed!
+int cluster_send_groupe(int gid)
+{
+ if (!config->cluster_iam_master)
+ {
+ LOG(0, 0, gid, "I'm not a master, but I just tried to change a groupe!\n");
+ return -1;
+ }
+
+ return type_changed(C_CGROUPE, gid);
+}
+
+// A particular tunnel has been changed!
+int cluster_send_tunnel(int tid)
+{
+ if (!config->cluster_iam_master) {
+ LOG(0, 0, tid, "I'm not a master, but I just tried to change a tunnel!\n");
+ return -1;
+ }
+
+ return type_changed(C_CTUNNEL, tid);
+}
+
+
+//
+// We're a master, and a slave has just told us that it's
+// missed a packet. We'll resend it every packet since
+// the last one it's seen.
+//
+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)
+ diff += HB_MAX_SEQ;
+
+ if (diff >= HB_HISTORY_SIZE) { // Ouch. We don't have the packet to send it!
+ LOG(0, 0, 0, "A slave asked for message %d when our seq number is %d. Killing it.\n",
+ seq, config->cluster_seq_number);
+ 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;
+ 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);
+ return -1; // What to do here!?
+ }
+ peer_send_data(slave, past_hearts[s].data, past_hearts[s].size);
+ seq = (seq+1)%HB_MAX_SEQ; // Increment to next seq number.
+ }
+ return 0; // All good!
+}
+
+//
+// We've heard from another peer! Add it to the list
+// that we select from at election time.
+//
+static int cluster_add_peer(in_addr_t peer, time_t basetime, pingt *pp, int size)
+{
+ int i;
+ in_addr_t clusterid;
+ pingt p;
+
+ // Allow for backward compatability.
+ // Just the ping packet into a new structure to allow
+ // for the possibility that we might have received
+ // more or fewer elements than we were expecting.
+ if (size > sizeof(p))
+ size = sizeof(p);
+
+ memset( (void *) &p, 0, sizeof(p) );
+ memcpy( (void *) &p, (void *) pp, size);
+
+ clusterid = p.addr;
+ if (clusterid != config->bind_address)
+ {
+ // Is this for us?
+ LOG(4, 0, 0, "Skipping ping from %s (different cluster)\n", fmtaddr(peer, 0));
+ return 0;
+ }
+
+ for (i = 0; i < num_peers ; ++i)
+ {
+ if (peers[i].peer != peer)
+ continue;
+
+ // This peer already exists. Just update the timestamp.
+ peers[i].basetime = basetime;
+ peers[i].timestamp = TIME;
+ peers[i].uptodate = !p.undef;
+ break;
+ }
+
+ // Is this the master shutting down??
+ 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();
+ }
+
+ if (i >= num_peers)
+ {
+ LOG(4, 0, 0, "Adding %s as a peer\n", fmtaddr(peer, 0));
+
+ // Not found. Is there a stale slot to re-use?
+ for (i = 0; i < num_peers ; ++i)
+ {
+ if (!peers[i].basetime) // Shutdown
+ break;
+
+ if ((peers[i].timestamp + config->cluster_hb_timeout * 10) < TIME) // Stale.
+ break;
+ }
+
+ if (i >= CLUSTER_MAX_SIZE)
+ {
+ // Too many peers!!
+ LOG(0, 0, 0, "Tried to add %s as a peer, but I already have %d of them!\n", fmtaddr(peer, 0), i);
+ return -1;
+ }
+
+ peers[i].peer = peer;
+ peers[i].basetime = basetime;
+ peers[i].timestamp = TIME;
+ peers[i].uptodate = !p.undef;
+ if (i == num_peers)
+ ++num_peers;
+
+ LOG(1, 0, 0, "Added %s as a new peer. Now %d peers\n", fmtaddr(peer, 0), 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(uint8_t *data, int size)
+{
+ bytest *b;
+
+ b = (bytest *) data;
+
+ LOG(3, 0, 0, "Got byte counter update (size %d)\n", size);
+
+ /* Loop around, adding the byte
+ counts to each of the sessions. */
+
+ while (size >= sizeof(*b) ) {
+ if (b->sid > MAXSESSION) {
+ LOG(0, 0, 0, "Got C_BYTES with session #%d!\n", b->sid);
+ return -1; /* Abort processing */
+ }
+
+ 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;
+
+ if (b->cin)
+ session[b->sid].last_packet = session[b->sid].last_data = time_now;
+ else if (b->cout)
+ session[b->sid].last_data = time_now;
+
+ size -= sizeof(*b);
+ ++b;
+ }
+
+ if (size != 0)
+ LOG(0, 0, 0, "Got C_BYTES with %d bytes of trailing junk!\n", size);
+
+ return size;
+}
+
+//
+// Handle receiving a session structure in a heartbeat packet.
+//
+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");
+ return -1;
+ }
+
+ if (session[more].tunnel == T_UNDEF) {
+ if (config->cluster_iam_uptodate) { // Sanity.
+ LOG(0, 0, 0, "I thought I was uptodate but I just found an undefined session!\n");
+ } else {
+ --config->cluster_undefined_sessions;
+ }
+ }
+
+ load_session(more, (sessiont *) p); // Copy session into session table..
+
+ LOG(5, more, 0, "Received session update (%d undef)\n", config->cluster_undefined_sessions);
+
+ if (!config->cluster_iam_uptodate)
+ cluster_uptodate(); // Check to see if we're up to date.
+
+ 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_groupe(int more, uint8_t *p)
+{
+ if (more >= MAXGROUPE) {
+ LOG(0, 0, 0, "DANGER: Received a group id > MAXGROUPE!\n");
+ return -1;
+ }
+
+ if (grpsession[more].state == GROUPEUNDEF) {
+ if (config->cluster_iam_uptodate) { // Sanity.
+ LOG(0, 0, 0, "I thought I was uptodate but I just found an undefined group!\n");
+ } else {
+ --config->cluster_undefined_groupes;
+ }
+ }
+
+ grp_cluster_load_groupe(more, (groupsesst *) p); // Copy groupe into groupe table..
+
+ LOG(5, 0, more, "Received group update (%d undef)\n", config->cluster_undefined_groupes);
+
+ 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) {
+ LOG(0, 0, 0, "DANGER: Received a tunnel session id > MAXTUNNEL!\n");
+ return -1;
+ }
+
+ if (tunnel[more].state == TUNNELUNDEF) {
+ if (config->cluster_iam_uptodate) { // Sanity.
+ LOG(0, 0, 0, "I thought I was uptodate but I just found an undefined tunnel!\n");
+ } else {
+ --config->cluster_undefined_tunnels;
+ }
+ }
+
+ memcpy(&tunnel[more], p, sizeof(tunnel[more]) );
+
+ //
+ // Clear tunnel control messages. These are dynamically allocated.
+ // If we get unlucky, this may cause the tunnel to drop!
+ //
+ tunnel[more].controls = tunnel[more].controle = NULL;
+ tunnel[more].controlc = 0;
+
+ LOG(5, 0, more, "Received tunnel update\n");
+
+ if (!config->cluster_iam_uptodate)
+ cluster_uptodate(); // Check to see if we're up to date.
+
+ return 0;
+}
+
+
+// pre v6 heartbeat session structure
+struct oldsession {
+ sessionidt next;
+ sessionidt far;
+ tunnelidt tunnel;
+ uint8_t flags;
+ struct {
+ uint8_t phase;
+ uint8_t lcp:4;
+ uint8_t ipcp:4;
+ uint8_t ipv6cp:4;
+ uint8_t ccp:4;
+ } ppp;
+ char reserved_1[2];
+ in_addr_t ip;
+ int ip_pool_index;
+ uint32_t unique_id;
+ char reserved_2[4];
+ uint32_t magic;
+ uint32_t pin, pout;
+ uint32_t cin, cout;
+ uint32_t cin_wrap, cout_wrap;
+ uint32_t cin_delta, cout_delta;
+ uint16_t throttle_in;
+ uint16_t throttle_out;
+ uint8_t filter_in;
+ uint8_t filter_out;
+ uint16_t mru;
+ clockt opened;
+ clockt die;
+ uint32_t session_timeout;
+ uint32_t idle_timeout;
+ time_t last_packet;
+ time_t last_data;
+ in_addr_t dns1, dns2;
+ routet route[MAXROUTE];
+ uint16_t tbf_in;
+ uint16_t tbf_out;
+ int random_vector_length;
+ uint8_t random_vector[MAXTEL];
+ char user[MAXUSER];
+ char called[MAXTEL];
+ char calling[MAXTEL];
+ uint32_t tx_connect_speed;
+ uint32_t rx_connect_speed;
+ clockt timeout;
+ uint32_t mrru;
+ uint8_t mssf;
+ epdist epdis;
+ bundleidt bundle;
+ in_addr_t snoop_ip;
+ uint16_t snoop_port;
+ uint8_t walled_garden;
+ uint8_t ipv6prefixlen;
+ struct in6_addr ipv6route;
+ char reserved_3[11];
+};
+
+struct oldsessionV7 {
+ sessionidt next; // next session in linked list
+ sessionidt far; // far end session ID
+ tunnelidt tunnel; // near end tunnel ID
+ uint8_t flags; // session flags: see SESSION_*
+ struct {
+ uint8_t phase; // PPP phase
+ uint8_t lcp:4; // LCP state
+ uint8_t ipcp:4; // IPCP state
+ uint8_t ipv6cp:4; // IPV6CP state
+ uint8_t ccp:4; // CCP state
+ } ppp;
+ uint16_t mru; // maximum receive unit
+ in_addr_t ip; // IP of session set by RADIUS response (host byte order).
+ int ip_pool_index; // index to IP pool
+ uint32_t unique_id; // unique session id
+ uint32_t magic; // ppp magic number
+ uint32_t pin, pout; // packet counts
+ uint32_t cin, cout; // byte counts
+ uint32_t cin_wrap, cout_wrap; // byte counter wrap count (RADIUS accounting giagawords)
+ uint32_t cin_delta, cout_delta; // byte count changes (for dump_session())
+ uint16_t throttle_in; // upstream throttle rate (kbps)
+ uint16_t throttle_out; // downstream throttle rate
+ uint8_t filter_in; // input filter index (to ip_filters[N-1]; 0 if none)
+ uint8_t filter_out; // output filter index
+ uint16_t snoop_port; // Interception destination port
+ in_addr_t snoop_ip; // Interception destination IP
+ clockt opened; // when started
+ clockt die; // being closed, when to finally free
+ uint32_t session_timeout; // Maximum session time in seconds
+ uint32_t idle_timeout; // Maximum idle time in seconds
+ time_t last_packet; // Last packet from the user (used for idle timeouts)
+ time_t last_data; // Last data packet to/from the user (used for idle timeouts)
+ in_addr_t dns1, dns2; // DNS servers
+ routet route[MAXROUTE]; // static routes
+ uint16_t tbf_in; // filter bucket for throttling in from the user.
+ uint16_t tbf_out; // filter bucket for throttling out to the user.
+ int random_vector_length;
+ uint8_t random_vector[MAXTEL];
+ char user[MAXUSER]; // user (needed in session for radius stop messages)
+ char called[MAXTEL]; // called number
+ char calling[MAXTEL]; // calling number
+ uint32_t tx_connect_speed;
+ uint32_t rx_connect_speed;
+ clockt timeout; // Session timeout
+ uint32_t mrru; // Multilink Max-Receive-Reconstructed-Unit
+ epdist epdis; // Multilink Endpoint Discriminator
+ bundleidt bundle; // Multilink Bundle Identifier
+ uint8_t mssf; // Multilink Short Sequence Number Header Format
+ uint8_t walled_garden; // is this session gardened?
+ uint8_t classlen; // class (needed for radius accounting messages)
+ char class[MAXCLASS];
+ uint8_t ipv6prefixlen; // IPv6 route prefix length
+ struct in6_addr ipv6route; // Static IPv6 route
+ sessionidt forwardtosession; // LNS id_session to forward
+ uint8_t src_hwaddr[ETH_ALEN]; // MAC addr source (for pppoe sessions 6 bytes)
+ char reserved[4]; // Space to expand structure without changing HB_VERSION
+};
+
+struct oldsessionV8 {
+ sessionidt next; // next session in linked list
+ sessionidt far; // far end session ID
+ tunnelidt tunnel; // near end tunnel ID
+ uint8_t flags; // session flags: see SESSION_*
+ struct {
+ uint8_t phase; // PPP phase
+ uint8_t lcp:4; // LCP state
+ uint8_t ipcp:4; // IPCP state
+ uint8_t ipv6cp:4; // IPV6CP state
+ uint8_t ccp:4; // CCP state
+ } ppp;
+ uint16_t mru; // maximum receive unit
+ in_addr_t ip; // IP of session set by RADIUS response (host byte order).
+ int ip_pool_index; // index to IP pool
+ uint32_t unique_id; // unique session id
+ uint32_t magic; // ppp magic number
+ uint32_t pin, pout; // packet counts
+ uint32_t cin, cout; // byte counts
+ uint32_t cin_wrap, cout_wrap; // byte counter wrap count (RADIUS accounting giagawords)
+ uint32_t cin_delta, cout_delta; // byte count changes (for dump_session())
+ uint16_t throttle_in; // upstream throttle rate (kbps)
+ uint16_t throttle_out; // downstream throttle rate
+ uint8_t filter_in; // input filter index (to ip_filters[N-1]; 0 if none)
+ uint8_t filter_out; // output filter index
+ uint16_t snoop_port; // Interception destination port
+ in_addr_t snoop_ip; // Interception destination IP
+ clockt opened; // when started
+ clockt die; // being closed, when to finally free
+ uint32_t session_timeout; // Maximum session time in seconds
+ uint32_t idle_timeout; // Maximum idle time in seconds
+ time_t last_packet; // Last packet from the user (used for idle timeouts)
+ time_t last_data; // Last data packet to/from the user (used for idle timeouts)
+ in_addr_t dns1, dns2; // DNS servers
+ routet route[MAXROUTE]; // static routes
+ uint16_t tbf_in; // filter bucket for throttling in from the user.
+ uint16_t tbf_out; // filter bucket for throttling out to the user.
+ int random_vector_length;
+ uint8_t random_vector[MAXTEL];
+ char user[MAXUSER]; // user (needed in session for radius stop messages)
+ char called[MAXTEL]; // called number
+ char calling[MAXTEL]; // calling number
+ uint32_t tx_connect_speed;
+ uint32_t rx_connect_speed;
+ clockt timeout; // Session timeout
+ uint32_t mrru; // Multilink Max-Receive-Reconstructed-Unit
+ epdist epdis; // Multilink Endpoint Discriminator
+ bundleidt bundle; // Multilink Bundle Identifier
+ uint8_t mssf; // Multilink Short Sequence Number Header Format
+ uint8_t walled_garden; // is this session gardened?
+ uint8_t classlen; // class (needed for radius accounting messages)
+ char class[MAXCLASS];
+ uint8_t ipv6prefixlen; // IPv6 route prefix length
+ struct in6_addr ipv6route; // Static IPv6 route
+ sessionidt forwardtosession; // LNS id_session to forward
+ uint8_t src_hwaddr[ETH_ALEN]; // MAC addr source (for pppoe sessions 6 bytes)
+ uint32_t dhcpv6_prefix_iaid; // prefix iaid requested by client
+ uint32_t dhcpv6_iana_iaid; // iaid of iana requested by client
+ struct in6_addr ipv6address; // Framed Ipv6 address
+ struct dhcp6_opt_clientid dhcpv6_client_id; // Size max (headers + DUID)
+ char reserved[4]; // Space to expand structure without changing HB_VERSION
+};
+
+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->flags;
+ new.ppp.phase = old->ppp.phase;
+ new.ppp.lcp = old->ppp.lcp;
+ new.ppp.ipcp = old->ppp.ipcp;
+ new.ppp.ipv6cp = old->ppp.ipv6cp;
+ new.ppp.ccp = old->ppp.ccp;
+ 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->cin;
+ new.cout = old->cout;
+ new.cin_wrap = old->cin_wrap;
+ new.cout_wrap = old->cout_wrap;
+ new.cin_delta = old->cin_delta;
+ new.cout_delta = old->cout_delta;
+ 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.session_timeout = old->session_timeout;
+ new.idle_timeout = old->idle_timeout;
+ new.last_packet = old->last_packet;
+ new.last_data = old->last_data;
+ 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.timeout = old->timeout;
+ new.mrru = old->mrru;
+ new.mssf = old->mssf;
+ new.epdis = old->epdis;
+ new.bundle = old->bundle;
+ new.snoop_ip = old->snoop_ip;
+ new.snoop_port = old->snoop_port;
+ new.walled_garden = old->walled_garden;
+ new.route6[0].ipv6prefixlen = old->ipv6prefixlen;
+ new.route6[0].ipv6route = old->ipv6route;
+
+ 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;
+}
+
+static uint8_t *convert_sessionV7(struct oldsessionV7 *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->flags;
+ new.ppp.phase = old->ppp.phase;
+ new.ppp.lcp = old->ppp.lcp;
+ new.ppp.ipcp = old->ppp.ipcp;
+ new.ppp.ipv6cp = old->ppp.ipv6cp;
+ new.ppp.ccp = old->ppp.ccp;
+ new.mru = old->mru;
+ 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->cin;
+ new.cout = old->cout;
+ new.cin_wrap = old->cin_wrap;
+ new.cout_wrap = old->cout_wrap;
+ new.cin_delta = old->cin_delta;
+ new.cout_delta = old->cout_delta;
+ 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.snoop_port = old->snoop_port;
+ new.snoop_ip = old->snoop_ip;
+ new.opened = old->opened;
+ new.die = old->die;
+ new.session_timeout = old->session_timeout;
+ new.idle_timeout = old->idle_timeout;
+ new.last_packet = old->last_packet;
+ new.last_data = old->last_data;
+ new.dns1 = old->dns1;
+ new.dns2 = old->dns2;
+ for (i = 0; i < MAXROUTE; i++)
+ memcpy(&new.route[i], &old->route[i], sizeof(new.route[i]));
+ new.tbf_in = old->tbf_in;
+ new.tbf_out = old->tbf_out;
+ new.random_vector_length = old->random_vector_length;
+ 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));
+ new.tx_connect_speed = old->tx_connect_speed;
+ new.rx_connect_speed = old->rx_connect_speed;
+ new.timeout = old->timeout;
+ new.mrru = old->mrru;
+ new.epdis = old->epdis;
+ new.bundle = old->bundle;
+ new.mssf = old->mssf;
+ new.walled_garden = old->walled_garden;
+ new.classlen = old->classlen;
+ memcpy(new.class, old->class, sizeof(new.class));
+ new.route6[0].ipv6prefixlen = old->ipv6prefixlen;
+ new.route6[0].ipv6route = old->ipv6route;
+
+ new.forwardtosession = old->forwardtosession;
+ memcpy(new.src_hwaddr, old->src_hwaddr, sizeof(new.src_hwaddr));
+
+ return (uint8_t *) &new;
+}
+
+static uint8_t *convert_sessionV8(struct oldsessionV8 *old)
projects / l2tpns.git / blobdiff