// L2TPNS Clustering Stuff
-char const *cvs_id_cluster = "$Id: cluster.c,v 1.7 2004-07-07 09:09:53 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"
#include "cluster.h"
#include "util.h"
#include "tbf.h"
+#include "pppoe.h"
#ifdef BGP
#include "bgp.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.
-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_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 {
- 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 have_peers; // At least one up to date peer
-int rle_decompress(u8 ** src_p, int ssize, u8 *dst, int dsize);
-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
//
int cluster_init()
{
- struct sockaddr_in addr;
- struct sockaddr_in interface_addr;
- struct ip_mreq mreq;
- struct ifreq ifr;
- int opt = 0;
+ 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_tunnels = MAXTUNNEL-1;
+ config->cluster_undefined_sessions = MAXSESSION-1;
+ config->cluster_undefined_bundles = MAXBUNDLE-1;
+ config->cluster_undefined_tunnels = MAXTUNNEL-1;
- if (!config->cluster_address)
- return 0;
- if (!*config->cluster_interface)
- return 0;
+ if (!config->cluster_address)
+ return 0;
+ if (!*config->cluster_interface)
+ return 0;
- cluster_sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ 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));
+ 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));
- if (bind(cluster_sockfd, (void *) &addr, sizeof(addr)) < 0)
- {
- log(0, 0, 0, 0, "Failed to bind cluster socket: %s\n", strerror(errno));
- return -1;
- }
+ opt = fcntl(cluster_sockfd, F_GETFL, 0);
+ fcntl(cluster_sockfd, F_SETFL, opt | O_NONBLOCK);
- strcpy(ifr.ifr_name, config->cluster_interface);
- if (ioctl(cluster_sockfd, SIOCGIFADDR, &ifr) < 0) {
- log(0, 0, 0, 0, "Failed to get interface address for (%s): %s\n", config->cluster_interface, strerror(errno));
- return -1;
- }
+ if (bind(cluster_sockfd, (void *) &addr, sizeof(addr)) < 0)
+ {
+ LOG(0, 0, 0, "Failed to bind cluster socket: %s\n", strerror(errno));
+ return -1;
+ }
- memcpy(&interface_addr, &ifr.ifr_addr, sizeof(interface_addr) );
- my_address = interface_addr.sin_addr.s_addr;
+ 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;
+ }
- // Join multicast group.
- mreq.imr_multiaddr.s_addr = config->cluster_address;
- mreq.imr_interface = interface_addr.sin_addr;
+ 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 (setsockopt(cluster_sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
- log(0, 0, 0, 0, "Failed to setsockopt (join mcast group): %s\n", strerror(errno));
- return -1;
- }
+ opt = 0; // Turn off multicast loopback.
+ setsockopt(cluster_sockfd, IPPROTO_IP, IP_MULTICAST_LOOP, &opt, sizeof(opt));
- if (setsockopt (cluster_sockfd, IPPROTO_IP, IP_MULTICAST_IF, &interface_addr, sizeof(interface_addr)) < 0) {
- log(0, 0, 0, 0, "Failed to setsockopt (set mcast interface): %s\n", strerror(errno));
- return -1;
- }
+ 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;
- config->cluster_last_hb = TIME;
- config->cluster_seq_number = -1;
+ 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;
+ }
- return cluster_sockfd;
+ 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;
}
// address ).
//
-int cluster_send_data(void *data, int datalen)
+static int cluster_send_data(void *data, int datalen)
{
- struct sockaddr_in addr = {0};
+ struct sockaddr_in addr = {0};
- if (!cluster_sockfd) return -1;
- if (!config->cluster_address) return 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;
+ addr.sin_addr.s_addr = config->cluster_address;
+ addr.sin_port = htons(CLUSTERPORT);
+ addr.sin_family = AF_INET;
- log(5,0,0,0, "Cluster send data: %d bytes\n", datalen);
+ 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, 0, "sendto: %s\n", strerror(errno));
- return -1;
- }
+ 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;
+ return 0;
}
//
// 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)
{
- * ( (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;
}
}
-void cluster_uptodate(void)
+// advertise our presence via BGP or gratuitous ARP
+static void advertise_routes(void)
{
- if (config->cluster_iam_uptodate)
- return;
-
- if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels)
- return;
-
- config->cluster_iam_uptodate = 1;
-
- log(0,0,0,0, "Now uptodate with master.\n");
-
#ifdef BGP
if (bgp_configured)
bgp_enable_routing(1);
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)
+ 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.
//
-int peer_send_data(u32 peer, char * data, int size)
+static int peer_send_data(in_addr_t peer, uint8_t *data, int size)
{
- struct sockaddr_in addr = {0};
+ struct sockaddr_in addr = {0};
- if (!cluster_sockfd) return -1;
- if (!config->cluster_address) return 0;
+ if (!cluster_sockfd) return -1;
+ if (!config->cluster_address) return 0;
- if (!peer) // Odd??
- return -1;
+ if (!peer) // Odd??
+ return -1;
- addr.sin_addr.s_addr = peer;
- addr.sin_port = htons(CLUSTERPORT);
- addr.sin_family = AF_INET;
+ addr.sin_addr.s_addr = peer;
+ addr.sin_port = htons(CLUSTERPORT);
+ addr.sin_family = AF_INET;
- log_hex(5, "Peer send", data, size);
+ LOG_HEX(5, "Peer send", data, size);
- if (sendto(cluster_sockfd, data, size, MSG_NOSIGNAL, (void *) &addr, sizeof(addr)) < 0)
- {
- log(0, 0, 0, 0, "sendto: %s\n", strerror(errno));
- return -1;
- }
+ 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;
+ return 0;
}
//
// Send a structured message to a peer with a single element of type 'type'.
//
-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, uint8_t *data, int size)
{
- char buf[65536]; // Vast overkill.
- char * p = buf;
+ uint8_t buf[65536]; // Vast overkill.
+ uint8_t *p = buf;
- log(4,0,0,0, "Sending message to peer (type %d, more %d, size %d)\n", type, more, size);
+ 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 tap device.
-//
-int master_forward_packet(char * data, int size, u32 addr, int port)
+// 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)
{
- char buf[65536]; // Vast overkill.
- char * p = buf;
+ 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(4,0,0,0, "Forwarding packet from %s to master (size %d)\n", inet_toa(addr), size);
+ 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) );
- memcpy(p, data, size);
- p += size;
+ add_type(&p, C_FORWARD, addr, (uint8_t *) &indexandport, sizeof(indexandport));
- return peer_send_data(config->cluster_master_address, buf, (p-buf) );
+ 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);
}
//
// 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;
- log(4,0,0,0, "Throttling packet master (size %d, tbfid %d)\n", size, tbfid);
+ LOG(4, 0, 0, "Throttling packet master (size %d, tbfid %d)\n", size, tbfid);
add_type(&p, C_THROTTLE, tbfid, data, size);
//
// (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;
- log(4,0,0,0, "Walled garden packet to master (size %d)\n", size);
+ LOG(4, 0, 0, "Walled garden packet to master (size %d)\n", size);
add_type(&p, C_GARDEN, s, data, size);
}
+//
+// 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, char * data, int size)
+static void send_heartbeat(int seq, uint8_t *data, int size)
{
- int i;
- static int last_seq = -1;
-
- if (last_seq != -1 && (seq != (last_seq+1)%HB_MAX_SEQ) ) {
- log(0,0,0,0, "FATAL: Sequence number skipped! (%d != %d)\n",
- seq, last_seq);
- }
- last_seq = seq;
-
- if (size > sizeof(past_hearts[0].data)) {
- log(0,0,0,0, "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);
+ 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);
}
//
//
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.
return;
- log(5,0,0,0, "Sending cluster ping...\n");
+ 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;
+ x.undef = config->cluster_undefined_sessions + config->cluster_undefined_tunnels + config->cluster_undefined_bundles;
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) );
}
//
// Walk the session counters looking for non-zero ones to send
-// to the master. We send up to 100 of them at one time.
-// We examine a maximum of 2000 sessions.
+// 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 (400)
+#define MAX_B_RECS (600)
void master_update_counts(void)
{
int i, c;
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;
+ 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(4,0,0,0, "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);
+ 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, tcount, high_sid = 0;
+ int i, count, high_unique_id = 0;
int last_free = 0;
- int had_peers = have_peers;
clockt t = TIME;
static int probed = 0;
+ int have_peers;
- if (TIME < (config->cluster_last_hb + config->cluster_hb_timeout))
+ 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 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
- // 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)))
{
- if (!probed)
- {
- probed = 1;
- log(1, 0, 0, 0, "Heartbeat from master %.1fs late, probing...\n",
- TIME - (config->cluster_last_hb + 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;
+ peer_send_message(config->cluster_master_address,
+ C_LASTSEEN, config->cluster_seq_number, NULL, 0);
}
-
- if (!config->cluster_iam_master)
- return; // Everything's ok. return.
-
- // Master needs to check peer state
+ } else { // We got a recent heartbeat; reset the probe flag.
+ probed = 0;
}
- config->cluster_last_hb = TIME + 1;
+ if (TIME < (config->cluster_last_hb + config->cluster_hb_timeout))
+ return; // Everything's ok!
- if (config->cluster_iam_master)
- config->cluster_iam_uptodate = 1; // cleared in loop below
- else
- log(0,0,0,0, "Master timed out! Holding election...\n");
+ 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].basetime)
continue; // Shutdown peer! Skip them.
- if (peers[i].uptodate)
- have_peers = 1;
-
- if (config->cluster_iam_master)
- {
- if (!peers[i].uptodate)
- config->cluster_iam_uptodate = 0; // Start fast heartbeats
-
- continue;
- }
-
if (peers[i].basetime < basetime) {
- log(1,0,0,0, "Expecting %s to become master\n", inet_toa(peers[i].peer) );
+ 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(1,0,0,0, "Expecting %s to become master\n", inet_toa(peers[i].peer) );
+ 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 (config->cluster_iam_master) // If we're the master, we've already won
- {
-#ifdef BGP
- // master lost all slaves, need to handle traffic ourself
- if (bgp_configured && had_peers && !have_peers)
- bgp_enable_routing(1);
-#endif /* BGP */
- return;
+ 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;
+ pppoe_send_garp(); // gratuitous arp of the pppoe interface
- log(0,0,0,0, "I am declaring myself the master!\n");
+ LOG(0, 0, 0, "I am declaring myself the master!\n");
-#ifdef BGP
- if (bgp_configured && have_peers)
- bgp_enable_routing(0); /* stop handling traffic */
-#endif /* BGP */
+ 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 the highest used tunnel number as well.
//
config->cluster_highest_tunnelid = 0;
- for (i = 0, tcount = 0; i < MAXTUNNEL; ++i) {
+ for (i = 0; i < MAXTUNNEL; ++i) {
if (tunnel[i].state == TUNNELUNDEF)
tunnel[i].state = TUNNELFREE;
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 sessions as being defined.
// reset the idle timeouts.
// Re-string the free list.
// Find the ID of the highest session.
last_free = 0;
- high_sid = 0;
+ high_unique_id = 0;
config->cluster_highest_sessionid = 0;
for (i = 0, count = 0; i < MAXSESSION; ++i) {
if (session[i].tunnel == T_UNDEF) {
++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..
- 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 idle timeouts..
+ session[i].last_packet = session[i].last_data = time_now;
- sess_count[i].cin = sess_count[i].cout = 0;
+ // Reset die relative to our uptime rather than the old master's
+ if (session[i].die) session[i].die = TIME;
- session[i].radius = 0; // Reset authentication as the radius blocks aren't up to date.
+ // 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;
- if (session[i].sid >= high_sid) // This is different to the index into the session table!!!
- high_sid = session[i].sid+1;
+ 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;
- session[i].tbf_in = session[i].tbf_out = 0; // Remove stale pointers from old master.
- throttle_session(i, session[i].throttle);
+ sess_local[i].radius = 0; // Reset authentication as the radius blocks aren't up to date.
-// I'm unsure about this. --mo
-// It's potentially a good thing, but it could send a
-// LOT of packets.
-// if (session[i].throttle)
-// cluster_send_session(s); // Tell the slaves about the new tbf indexes.
+ 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;
- if (session[i].tunnel != T_FREE && i > config->cluster_highest_sessionid)
- config->cluster_highest_sessionid = i;
+ 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_sid = high_sid; // 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)
- log(0,0,0,0, "Warning: Fixed %d uninitialized sessions in becoming master!\n", count);
+ 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
+ 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
// 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(2,0,0,0, "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();
}
-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.
- 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, 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
- 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));
+ case C_TUNNEL:
+ add_type(p, C_TUNNEL, id, (uint8_t *) &tunnel[id], sizeof(tunnelt));
break;
default:
- log(0,0,0,0, "Found an invalid type in heart queue! (%d)\n", type);
+ LOG(0, 0, 0, "Found an invalid type in heart queue! (%d)\n", type);
kill(0, SIGTERM);
exit(1);
}
//
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;
+ config->cluster_table_version += config->cluster_num_changes;
+
// Fill out the heartbeat header.
memset(&h, 0, sizeof(h));
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);
}
if (p > (buff + sizeof(buff))) { // Did we somehow manage to overun the buffer?
- log(0,0,0,0, "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;
++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_CBUNDLE, walk_bundle_number);
+ walk_bundle_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(0,0,0,0, "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(3,0,0,0, "Sending heartbeat #%d with %d changes (%d x-sess, %d x-tunnels, %d highsess, %d hightun size %d)\n",
- h.seq, config->cluster_num_changes, count, tcount, config->cluster_highest_sessionid,
- config->cluster_highest_tunnelid, (p-buff));
+ LOG(4, 0, 0, "Sending v%d heartbeat #%d, change #%" PRIu64 " with %d changes "
+ "(%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, bcount, tcount, config->cluster_highest_sessionid, config->cluster_highest_bundleid,
+ config->cluster_highest_tunnelid, (int) (p - buff));
config->cluster_num_changes = 0;
//
// A structure of type 'type' has changed; Add it to the queue to send.
//
-int type_changed(int type, int id)
+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)
- return 0; // Already marked for change.
+ {
+ 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[i].type = type;
- cluster_changes[i].id = id;
+ 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)
return 1;
}
-
// A particular session has been changed!
int cluster_send_session(int sid)
{
if (!config->cluster_iam_master) {
- log(0,0,sid,0, "I'm not a master, but I just tried to change a session!\n");
+ 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 tunnel has been changed!
int cluster_send_tunnel(int tid)
{
if (!config->cluster_iam_master) {
- log(0,0,0,tid, "I'm not a master, but I just tried to change a tunnel!\n");
+ LOG(0, 0, tid, "I'm not a master, but I just tried to change a tunnel!\n");
return -1;
}
// missed a packet. We'll resend it every packet since
// the last one it's seen.
//
-int cluster_catchup_slave(int seq, u32 slave)
+static int cluster_catchup_slave(int seq, in_addr_t slave)
{
int s;
int diff;
- log(1,0,0,0, "Slave %s sent LASTSEEN with seq %d\n", inet_toa(slave), seq);
+ 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(0,0,0,0, "A slaved asked for message %d when our seq number is %d. Killing it.\n",
+ 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;
+ s = seq % HB_HISTORY_SIZE;
if (seq != past_hearts[s].seq) {
- int i;
- log(0,0,0,0, "Tried to re-send heartbeat for %s but %d doesn't match %d! (%d,%d)\n",
- inet_toa(slave), seq, past_hearts[s].seq, s, config->cluster_seq_number);
-
- for (i = 0; i < HB_HISTORY_SIZE; ++i) {
- log(0,0,0,0, "\tentry %3d: seq %d (size %d)\n", i, past_hearts[s].seq, past_hearts[s].size);
- }
+ 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);
// We've heard from another peer! Add it to the list
// that we select from at election time.
//
-int cluster_add_peer(u32 peer, time_t basetime, pingt *p)
+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;
- clusterid = p->addr;
+ // 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(4,0,0,0, "Skipping ping from %s (different cluster)\n", inet_toa(peer));
+ LOG(4, 0, 0, "Skipping ping from %s (different cluster)\n", fmtaddr(peer, 0));
return 0;
}
// This peer already exists. Just update the timestamp.
peers[i].basetime = basetime;
peers[i].timestamp = TIME;
- peers[i].uptodate = !p->undef;
+ peers[i].uptodate = !p.undef;
break;
}
- // Is this the master shutting down??
- if (peer == config->cluster_master_address && !basetime) {
+ // 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();
- return 0;
}
if (i >= num_peers)
{
- log(4,0,0,0, "Adding %s as a peer\n", inet_toa(peer));
+ 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 (i >= CLUSTER_MAX_SIZE)
{
// Too many peers!!
- log(0,0,0,0, "Tried to add %s as a peer, but I already have %d of them!\n", inet_toa(peer), i);
+ 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;
+ peers[i].uptodate = !p.undef;
if (i == num_peers)
++num_peers;
- log(1,0,0,0, "Added %s as a new peer. Now %d peers\n", inet_toa(peer), num_peers);
+ LOG(1, 0, 0, "Added %s as a new peer. Now %d peers\n", fmtaddr(peer, 0), num_peers);
}
- if (peers[i].uptodate)
- {
-#ifdef BGP
- /* drop routes if we've now got a peer */
- if (config->cluster_iam_master && bgp_configured && !have_peers)
- bgp_enable_routing(0);
-#endif /* BGP */
- have_peers = 1;
- }
- else if (config->cluster_iam_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;
+ if (master)
{
- config->cluster_iam_uptodate = 0; // increase heart-rate...
- }
+ // catchup with new master
+ peer_send_message(master, C_LASTSEEN, config->cluster_seq_number, NULL, 0);
+ // delay next election
+ config->cluster_last_hb = TIME;
+ }
- return 1;
+ // 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.
//
-int cluster_handle_bytes(char * data, int size)
+static int cluster_handle_bytes(uint8_t *data, int size)
{
- bytest * b;
+ bytest *b;
- b = (bytest*) data;
+ b = (bytest *) data;
- log(3,0,0,0, "Got byte counter update (size %d)\n", size);
+ 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(0,0,0,0, "Got C_BYTES with session #%d!\n", b->sid);
+ LOG(0, 0, 0, "Got C_BYTES with session #%d!\n", b->sid);
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;
- session[b->sid].cin += b->in;
- session[b->sid].cout += b->out;
- session[b->sid].last_packet = time_now; // Reset idle timer!
+ 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(0,0,0,0, "Got C_BYTES with %d bytes of trailing junk!\n", size);
+ 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 , u8 * p)
+static int cluster_recv_session(int more, uint8_t *p)
{
if (more >= MAXSESSION) {
- log(0,0,0,0, "DANGER: Received a heartbeat session id > MAXSESSION!\n");
+ 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(0,0,0,0, "I thought I was uptodate but I just found an undefined session!\n");
+ 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..
+ load_session(more, (sessiont *) p); // Copy session into session table..
- log(5,0,more,0, "Received session update (%d undef)\n", config->cluster_undefined_sessions);
+ 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_tunnel(int more, u8 *p)
+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) {
- log(0,0,0,0, "DANGER: Received a tunnel session id > MAXTUNNEL!\n");
+ 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(0,0,0,0, "I thought I was uptodate but I just found an undefined tunnel!\n");
+ LOG(0, 0, 0, "I thought I was uptodate but I just found an undefined tunnel!\n");
} else {
--config->cluster_undefined_tunnels;
}
tunnel[more].controls = tunnel[more].controle = NULL;
tunnel[more].controlc = 0;
- log(5,0,0,more, "Received tunnel update\n");
+ LOG(5, 0, more, "Received tunnel update\n");
if (!config->cluster_iam_uptodate)
cluster_uptodate(); // Check to see if we're up to date.
}
+// 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];
+};
+
+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.ipv6prefixlen = old->ipv6prefixlen;
+ new.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;
+}
+
//
// Process a heartbeat..
//
-static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32 addr)
+// v6: added RADIUS class attribute, re-ordered session structure
+// v7: added tunnelt attribute at the end of struct (tunnelt size change)
+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 != 3
+#if HB_VERSION != 7
# error "need to update cluster_process_heartbeat()"
#endif
- // we handle version 2+
- if (more < 2 || more > HB_VERSION) {
- log(0,0,0,0, "Received a heartbeat version that I don't support (%d)!\n", more);
+ // we handle versions 5 through 7
+ if (hb_ver < 5 || 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??
}
- // Ok. It's a heartbeat packet from a cluster master!
+ if (size > sizeof(past_hearts[0].data)) {
+ LOG(0, 0, 0, "Received an oversize heartbeat from %s (%d)!\n", fmtaddr(addr, 0), size);
+ return -1;
+ }
+
if (s < sizeof(*h))
goto shortpacket;
- h = (heartt*) p;
+ h = (heartt *) p;
p += sizeof(*h);
s -= sizeof(*h);
if (config->cluster_iam_master) { // Sanity...
// Note that this MUST match the election process above!
- log(0,0,0,0, "I just got a packet claiming to be from a master but _I_ am the master!\n");
+ LOG(0, 0, 0, "I just got a heartbeat from master %s, but _I_ am the master!\n", fmtaddr(addr, 0));
if (!h->basetime) {
- log(0,0,0,0, "Heartbeat from addr %s with zero basetime!\n", inet_toa(addr) );
+ LOG(0, 0, 0, "Heartbeat with zero basetime! Ignoring\n");
return -1; // Skip it.
}
+
+ 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(0,0,0,0, "They're (%s) an older master than me so I'm gone!\n", inet_toa(addr));
+ 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.
- log(0,0,0,0, "They're a higher IP address than me, so I'm gone!\n");
+
+ 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) {
+ 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(1,0,0,0, "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 (more > 2) // reserved section of heartt was not initialized prior to v3
+ if (h->interval != config->cluster_hb_interval)
{
- if (h->interval != config->cluster_hb_interval)
- {
- log(2, 0, 0, 0, "Master set ping/heartbeat interval to %u (was %u)\n",
- h->interval, config->cluster_hb_interval);
+ LOG(2, 0, 0, "Master set ping/heartbeat interval to %u (was %u)\n",
+ h->interval, config->cluster_hb_interval);
- config->cluster_hb_interval = h->interval;
- }
+ config->cluster_hb_interval = h->interval;
+ }
- if (h->timeout != config->cluster_hb_timeout)
- {
- log(2, 0, 0, 0, "Master set heartbeat timeout to %u (was %u)\n",
- h->timeout, config->cluster_hb_timeout);
+ if (h->timeout != config->cluster_hb_timeout)
+ {
+ LOG(2, 0, 0, "Master set heartbeat timeout to %u (was %u)\n",
+ h->timeout, config->cluster_hb_timeout);
- config->cluster_hb_timeout = h->timeout;
- }
+ config->cluster_hb_timeout = h->timeout;
}
// 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 < 6)
+ {
+ 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(0,0,0,0, "DANGER: Received a CSESSION that didn't decompress correctly!\n");
+ LOG(0, 0, 0, "DANGER: Received a CSESSION that didn't decompress correctly!\n");
// Now what? Should exit! No-longer up to date!
break;
}
break;
}
case C_SESSION:
+ if (hb_ver < 6)
+ {
+ 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!
- log(0,0,0,0, "DANGER: Received a CSESSION that didn't decompress correctly!\n");
+ if ( ((hb_ver >= HB_VERSION) && (size != sizeof(tunnelt))) ||
+ ((hb_ver < HB_VERSION) && (size > sizeof(tunnelt))) )
+ { // Ouch! Very very bad!
+ 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(0,0,0,0, "DANGER: I received a heartbeat element where I didn't understand the type! (%d)\n", type);
+ 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!!
}
}
+
if (config->cluster_master_address != addr)
{
- char *str;
- str = strdup(inet_toa(config->cluster_master_address));
- log(0,0,0,0, "My master just changed from %s to %s!\n", str, inet_toa(addr));
- if (str) free(str);
+ LOG(0, 0, 0, "My master just changed from %s to %s!\n",
+ fmtaddr(config->cluster_master_address, 0), fmtaddr(addr, 1));
+
+ config->cluster_master_address = addr;
}
- config->cluster_master_address = addr;
config->cluster_last_hb = TIME; // Successfully received a heartbeat!
+ config->cluster_table_version = h->table_version;
return 0;
shortpacket:
- log(0,0,0,0, "I got an incomplete heartbeat packet! This means I'm probably out of sync!!\n");
+ LOG(0, 0, 0, "I got an incomplete heartbeat packet! This means I'm probably out of sync!!\n");
return -1;
}
// We got a packet on the cluster port!
// Handle pings, lastseens, and heartbeats!
//
-int processcluster(char * data, int size, u32 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)
return -1; // Ignore it. Something looped back the multicast!
- log(5,0,0,0, "Process cluster: %d bytes from %s\n", size, inet_toa(addr));
+ LOG(5, 0, 0, "Process cluster: %d bytes from %s\n", size, fmtaddr(addr, 0));
if (s <= 0) // Any data there??
return -1;
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);
+ 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).
+ 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;
+ 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));
+
+ return -1;
+ }
+ else
+ {
+ struct sockaddr_in a;
+ uint16_t indexudp;
+ a.sin_addr.s_addr = more;
+
+ a.sin_port = (*(int *) p) & 0xFFFF;
+ indexudp = ((*(int *) p) >> 16) & 0xFFFF;
+ s -= sizeof(int);
+ p += sizeof(int);
- 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, indexudp);
+
+ return 0;
+ }
+ case C_PPPOE_FORWARD:
+ if (!config->cluster_iam_master)
+ {
+ LOG(0, 0, 0, "I'm not the master, but I got a C_PPPOE_FORWARD from %s?\n", fmtaddr(addr, 0));
+ return -1;
+ }
+ else
+ {
+ pppoe_process_forward(p, s, addr);
+ return 0;
+ }
- if (!config->cluster_iam_master) { // huh?
- log(0,0,0,0, "I'm not the master, but I got a C_FORWARD from %s?\n", inet_toa(addr));
+ case C_MPPP_FORWARD:
+ // Receive a MPPP packet from a slave.
+ if (!config->cluster_iam_master) {
+ LOG(0, 0, 0, "I'm not the master, but I got a C_MPPP_FORWARD from %s?\n", fmtaddr(addr, 0));
return -1;
}
- log(4,0,0,0, "Got a forwarded packet... (%s:%d)\n", inet_toa(more), a.sin_port);
- STAT(recv_forward);
- processudp(p, s, &a);
+ processipout(p, s);
return 0;
- }
+
case C_THROTTLE: { // Receive a forwarded packet from a slave.
if (!config->cluster_iam_master) {
- log(0,0,0,0, "I'm not the master, but I got a C_THROTTLE from %s?\n", inet_toa(addr));
+ LOG(0, 0, 0, "I'm not the master, but I got a C_THROTTLE from %s?\n", fmtaddr(addr, 0));
return -1;
}
case C_GARDEN:
// Receive a walled garden packet from a slave.
if (!config->cluster_iam_master) {
- log(0,0,0,0, "I'm not the master, but I got a C_GARDEN from %s?\n", inet_toa(addr));
+ LOG(0, 0, 0, "I'm not the master, but I got a C_GARDEN from %s?\n", fmtaddr(addr, 0));
return -1;
}
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).
if (config->cluster_iam_master) {
- log(0,0,0,0, "_I_ am master, but I received a C_KILL from %s! (Seq# %d)\n", inet_toa(addr), more);
+ LOG(0, 0, 0, "_I_ am master, but I received a C_KILL from %s! (Seq# %d)\n", fmtaddr(addr, 0), more);
return -1;
}
if (more != config->cluster_seq_number) {
- log(0,0,0,0, "The master asked us to die but the seq number didn't match!?\n");
+ LOG(0, 0, 0, "The master asked us to die but the seq number didn't match!?\n");
return -1;
}
if (addr != config->cluster_master_address) {
- log(0,0,0,0, "Received a C_KILL from %s which doesn't match config->cluster_master_address (%x)\n",
- inet_toa(addr), config->cluster_master_address);
+ LOG(0, 0, 0, "Received a C_KILL from %s which doesn't match config->cluster_master_address (%s)\n",
+ fmtaddr(addr, 0), fmtaddr(config->cluster_master_address, 1));
// We can only warn about it. The master might really have switched!
}
- log(0,0,0,0, "Received a valid C_KILL: I'm going to die now.\n");
+ LOG(0, 0, 0, "Received a valid C_KILL: I'm going to die now.\n");
kill(0, SIGTERM);
exit(0); // Lets be paranoid;
return -1; // Just signalling the compiler.
case C_HEARTBEAT:
- log(4,0,0,0, "Got a heartbeat from %s\n", inet_toa(addr));
+ LOG(4, 0, 0, "Got a heartbeat from %s\n", fmtaddr(addr, 0));
return cluster_process_heartbeat(data, size, more, p, addr);
default:
- log(0,0,0,0, "Strange type packet received on cluster socket (%d)\n", type);
+ LOG(0, 0, 0, "Strange type packet received on cluster socket (%d)\n", type);
return -1;
}
return 0;
shortpacket:
- log(0,0,0,0, "I got an cluster heartbeat packet! This means I'm probably out of sync!!\n");
+ LOG(0, 0, 0, "I got a _short_ cluster heartbeat packet! This means I'm probably out of sync!!\n");
return -1;
}
if (CLI_HELP_REQUESTED)
return CLI_HELP_NO_ARGS;
- cli_print(cli, "Cluster status : %s", config->cluster_iam_master ? "Master" : "Slave" );
- cli_print(cli, "My address : %s", inet_toa(my_address));
- cli_print(cli, "VIP address : %s", inet_toa(config->bind_address));
- cli_print(cli, "Multicast address: %s", inet_toa(config->cluster_address));
+ cli_print(cli, "Cluster status : %s", config->cluster_iam_master ? "Master" : "Slave" );
+ cli_print(cli, "My address : %s", fmtaddr(my_address, 0));
+ cli_print(cli, "VIP address : %s", fmtaddr(config->bind_address, 0));
+ cli_print(cli, "Multicast address: %s", fmtaddr(config->cluster_address, 0));
cli_print(cli, "Multicast i'face : %s", config->cluster_interface);
- if (!config->cluster_iam_master) {
+ if (!config->cluster_iam_master) {
cli_print(cli, "My master : %s (last heartbeat %.1f seconds old)",
- config->cluster_master_address ? inet_toa(config->cluster_master_address) : "Not defined",
+ config->cluster_master_address
+ ? fmtaddr(config->cluster_master_address, 0)
+ : "Not defined",
0.1 * (TIME - config->cluster_last_hb));
- cli_print(cli, "Uptodate : %s", config->cluster_iam_uptodate ? "Yes" : "No");
+ cli_print(cli, "Uptodate : %s", config->cluster_iam_uptodate ? "Yes" : "No");
+ 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 # : %" 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", inet_toa(peers[i].peer),
+ 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 )
-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.
-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;
+ 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