cosmetic logging change

[l2tpns.git] / cluster.c

diff --git a/cluster.c b/cluster.c
index 3200c2f..4497f69 100644 (file)
--- a/cluster.c
+++ b/cluster.c
@@ -1,6 +1,6 @@
 // L2TPNS Clustering Stuff
 
 // L2TPNS Clustering Stuff
 

-char const *cvs_id_cluster = "$Id: cluster.c,v 1.12 2004/09/21 04:30:46 fred_nerk Exp $";
+char const *cvs_id_cluster = "$Id: cluster.c,v 1.24 2004/12/15 02:56:38 bodea Exp $";

 
 #include <stdio.h>
 #include <sys/file.h>
 
 #include <stdio.h>
 #include <sys/file.h>


@@ -67,8 +67,8 @@ static struct {
 } peers[CLUSTER_MAX_SIZE];     // List of all the peers we've heard from.
 static int num_peers;          // Number of peers in list.
 
 } peers[CLUSTER_MAX_SIZE];     // List of all the peers we've heard from.
 static int num_peers;          // Number of peers in list.
 

-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(u8 ** src_p, int ssize, u8 *dst, int dsize);
+static int rle_compress(u8 ** src_p, int ssize, u8 *dst, int dsize);

 
 //
 // Create a listening socket
 
 //
 // Create a listening socket


@@ -81,7 +81,7 @@ int cluster_init()
        struct sockaddr_in interface_addr;
        struct ip_mreq mreq;
        struct ifreq   ifr;
        struct sockaddr_in interface_addr;
        struct ip_mreq mreq;
        struct ifreq   ifr;

-       int opt = 0;
+       int opt;

 
        config->cluster_undefined_sessions = MAXSESSION-1;
        config->cluster_undefined_tunnels = MAXTUNNEL-1;
 
        config->cluster_undefined_sessions = MAXSESSION-1;
        config->cluster_undefined_tunnels = MAXTUNNEL-1;


@@ -99,39 +99,42 @@ int cluster_init()
        addr.sin_addr.s_addr = INADDR_ANY;
        setsockopt(cluster_sockfd, SOL_SOCKET, SO_REUSEADDR, &addr, sizeof(addr));
 
        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)
        {
        if (bind(cluster_sockfd, (void *) &addr, sizeof(addr)) < 0)
        {

-               log(0, 0, 0, 0, "Failed to bind cluster socket: %s\n", strerror(errno));
+               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)
        {
                return -1;
        }
 
        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));
+               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;
 
                return -1;
        }
 
        memcpy(&interface_addr, &ifr.ifr_addr, sizeof(interface_addr));
        my_address = interface_addr.sin_addr.s_addr;
 

-                               // Join multicast group.
+       // Join multicast group.

        mreq.imr_multiaddr.s_addr = config->cluster_address;
        mreq.imr_interface = interface_addr.sin_addr;
 
 
        mreq.imr_multiaddr.s_addr = config->cluster_address;
        mreq.imr_interface = interface_addr.sin_addr;
 
 

-       opt = 0;                // Turn off multicast loopback.
+       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)
        {
        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));
+               LOG(0, 0, 0, "Failed to setsockopt (join mcast group): %s\n", strerror(errno));

                return -1;
        }
 
                return -1;
        }
 

-       if (setsockopt (cluster_sockfd, IPPROTO_IP, IP_MULTICAST_IF, &interface_addr, sizeof(interface_addr)) < 0)
+       if (setsockopt(cluster_sockfd, IPPROTO_IP, IP_MULTICAST_IF, &interface_addr, sizeof(interface_addr)) < 0)

        {
        {

-               log(0, 0, 0, 0, "Failed to setsockopt (set mcast interface): %s\n", strerror(errno));
+               LOG(0, 0, 0, "Failed to setsockopt (set mcast interface): %s\n", strerror(errno));

                return -1;
        }
 
                return -1;
        }
 


@@ -147,7 +150,7 @@ int cluster_init()
 // address ).
 //
 
 // 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};
 


@@ -158,11 +161,11 @@ int cluster_send_data(void *data, int datalen)
        addr.sin_port = htons(CLUSTERPORT);
        addr.sin_family = AF_INET;
 
        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)
        {
 
        if (sendto(cluster_sockfd, data, datalen, MSG_NOSIGNAL, (void *) &addr, sizeof(addr)) < 0)
        {

-               log(0, 0, 0, 0, "sendto: %s\n", strerror(errno));
+               LOG(0, 0, 0, "sendto: %s\n", strerror(errno));

                return -1;
        }
 
                return -1;
        }
 


@@ -188,7 +191,19 @@ static void add_type(char ** p, int type, int more, char * data, int size)
        }
 }
 
        }
 }
 

-void cluster_uptodate(void)
+// advertise our presence via BGP or gratuitous ARP
+static void advertise(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.
+}
+
+static void cluster_uptodate(void)

 {
        if (config->cluster_iam_uptodate)
                return;
 {
        if (config->cluster_iam_uptodate)
                return;


@@ -198,22 +213,15 @@ void cluster_uptodate(void)
 
        config->cluster_iam_uptodate = 1;
 
 
        config->cluster_iam_uptodate = 1;
 

-       log(0,0,0,0, "Now uptodate with master.\n");
-
-#ifdef BGP
-       if (bgp_configured)
-               bgp_enable_routing(1);
-       else
-#endif /* BGP */
-               if (config->send_garp)
-                       send_garp(config->bind_address);        // Start taking traffic.
+       LOG(0, 0, 0, "Now uptodate with master.\n");
+       advertise();

 }
 
 //
 // Send a unicast UDP packet to a peer with 'data' as the
 // contents.
 //
 }
 
 //
 // 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(u32 peer, char * data, int size)

 {
        struct sockaddr_in addr = {0};
 
 {
        struct sockaddr_in addr = {0};
 


@@ -221,17 +229,17 @@ int peer_send_data(u32 peer, char * data, int size)
        if (!config->cluster_address) return 0;
 
        if (!peer)      // Odd??
        if (!config->cluster_address) return 0;
 
        if (!peer)      // Odd??

-       return -1;
+               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)
        {
 
        if (sendto(cluster_sockfd, data, size, MSG_NOSIGNAL, (void *) &addr, sizeof(addr)) < 0)
        {

-               log(0, 0, 0, 0, "sendto: %s\n", strerror(errno));
+               LOG(0, 0, 0, "sendto: %s\n", strerror(errno));

                return -1;
        }
 
                return -1;
        }
 


@@ -241,12 +249,12 @@ int peer_send_data(u32 peer, char * data, int size)
 //
 // Send a structured message to a peer with a single element of type 'type'.
 //
 //
 // 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(u32 peer, int type, int more, char * data, int size)

 {
        char buf[65536];        // Vast overkill.
        char * p = buf;
 
 {
        char buf[65536];        // Vast overkill.
        char * 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) );
        add_type(&p, type, more, data, size);
 
        return peer_send_data(peer, buf, (p-buf) );


@@ -266,7 +274,7 @@ int master_forward_packet(char *data, int size, u32 addr, int port)
        if (!config->cluster_master_address) // No election has been held yet. Just skip it.
                return -1;
 
        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) );
 
        STAT(c_forwarded);
        add_type(&p, C_FORWARD, addr, (char*) &port, sizeof(port) );


@@ -284,15 +292,15 @@ int master_forward_packet(char *data, int size, u32 addr, int port)
 // token bucket queue, and lets normal processing take care
 // of it.
 //
 // 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, char *data, int size)

 {
        char buf[65536];        // Vast overkill.
 {
        char buf[65536];        // Vast overkill.

-       char * p = buf;
+       char *p = buf;

 
        if (!config->cluster_master_address) // No election has been held yet. Just skip it.
                return -1;
 
 
        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);
 
 
        add_type(&p, C_THROTTLE, tbfid, data, size);
 


@@ -317,7 +325,7 @@ int master_garden_packet(sessionidt s, char *data, int size)
        if (!config->cluster_master_address) // No election has been held yet. Just skip it.
                return -1;
 
        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);
 
 
        add_type(&p, C_GARDEN, s, data, size);
 


@@ -335,7 +343,7 @@ static void send_heartbeat(int seq, char * data, int size)
 
        if (size > sizeof(past_hearts[0].data))
        {
 
        if (size > sizeof(past_hearts[0].data))
        {

-               log(0,0,0,0, "Tried to heartbeat something larger than the maximum packet!\n");
+               LOG(0, 0, 0, "Tried to heartbeat something larger than the maximum packet!\n");

                kill(0, SIGTERM);
                exit(1);
        }
                kill(0, SIGTERM);
                exit(1);
        }


@@ -358,7 +366,7 @@ void cluster_send_ping(time_t basetime)
        if (config->cluster_iam_master && basetime)             // We're heartbeating so no need to ping.
                return;
 
        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.ver = 1;
        x.addr = config->bind_address;


@@ -371,12 +379,12 @@ void cluster_send_ping(time_t basetime)
 
 //
 // Walk the session counters looking for non-zero ones to send
 
 //
 // 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).
 
 // (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;
 void master_update_counts(void)
 {
        int i, c;


@@ -417,7 +425,7 @@ void master_update_counts(void)
 
 
                        // Forward the data to the master.
 
 
                        // Forward the data to the master.

-       log(4,0,0,0, "Sending byte counters to master (%d elements)\n", c);
+       LOG(4, 0, 0, "Sending byte counters to master (%d elements)\n", c);

        peer_send_message(config->cluster_master_address, C_BYTES, c, (char*) &b, sizeof(b[0]) * c);
        return;
 }
        peer_send_message(config->cluster_master_address, C_BYTES, c, (char*) &b, sizeof(b[0]) * c);
        return;
 }


@@ -456,11 +464,9 @@ void cluster_check_slaves(void)
        }
 
 #ifdef BGP
        }
 
 #ifdef BGP

-       // master lost all slaves, need to handle traffic ourself
-       if (bgp_configured && had_peers && !have_peers)
-               bgp_enable_routing(1);
-       else if (bgp_configured && !had_peers && have_peers)
-               bgp_enable_routing(0);
+       // in a cluster, withdraw/add routes when we get a peer/lose all peers
+       if (bgp_configured && have_peers != had_peers)
+               bgp_enable_routing(!have_peers);

 #endif /* BGP */
 }
 
 #endif /* BGP */
 }
 


@@ -488,7 +494,7 @@ void cluster_check_master(void)
                if (!probed && config->cluster_master_address)
                {
                        probed = 1;
                if (!probed && config->cluster_master_address)
                {
                        probed = 1;

-                       log(1, 0, 0, 0, "Heartbeat from master %.1fs late, probing...\n",
+                       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,
                                0.1 * (TIME - (config->cluster_last_hb + config->cluster_hb_interval)));
 
                        peer_send_message(config->cluster_master_address,


@@ -503,7 +509,7 @@ void cluster_check_master(void)
 
        config->cluster_last_hb = TIME + 1;     // Just the one election thanks.
 
 
        config->cluster_last_hb = TIME + 1;     // Just the one election thanks.
 

-       log(0,0,0,0, "Master timed out! Holding election...\n");
+       LOG(0, 0, 0, "Master timed out! Holding election...\n");

 
        for (i = 0; i < num_peers; i++)
        {
 
        for (i = 0; i < num_peers; i++)
        {


@@ -514,13 +520,13 @@ void cluster_check_master(void)
                        continue;       // Shutdown peer! Skip them.
 
                if (peers[i].basetime < basetime) {
                        continue;       // Shutdown peer! Skip them.
 
                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) {
                        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.
                }
        }
                        return;         // They'll win the election. Wait for them to come up.
                }
        }


@@ -532,7 +538,7 @@ void cluster_check_master(void)
        config->cluster_iam_master = 1;
        config->cluster_master_address = 0;
 
        config->cluster_iam_master = 1;
        config->cluster_master_address = 0;
 

-       log(0,0,0,0, "I am declaring myself the master!\n");
+       LOG(0, 0, 0, "I am declaring myself the master!\n");

 
        if (config->cluster_seq_number == -1)
                config->cluster_seq_number = 0;
 
        if (config->cluster_seq_number == -1)
                config->cluster_seq_number = 0;


@@ -589,17 +595,10 @@ void cluster_check_master(void)
 
 
                session[i].tbf_in = session[i].tbf_out = 0; // Remove stale pointers from old master.
 
 
                session[i].tbf_in = session[i].tbf_out = 0; // Remove stale pointers from old master.

-               throttle_session(i, session[i].throttle);
-
-// 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.
+               throttle_session(i, session[i].throttle_in, session[i].throttle_out);

 
                if (session[i].tunnel != T_FREE && i > config->cluster_highest_sessionid)
                        config->cluster_highest_sessionid = i;
 
                if (session[i].tunnel != T_FREE && i > config->cluster_highest_sessionid)
                        config->cluster_highest_sessionid = i;

-

        }
 
        session[last_free].next = 0;    // End of chain.
        }
 
        session[last_free].next = 0;    // End of chain.


@@ -611,12 +610,15 @@ void cluster_check_master(void)
 
                // If we're not the very first master, this is a big issue!
        if(count>0)
 
                // 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);
+               LOG(0, 0, 0, "Warning: Fixed %d uninitialized sessions in becoming master!\n", count);

 
        config->cluster_undefined_sessions = 0;
        config->cluster_undefined_tunnels = 0;
        config->cluster_iam_uptodate = 1; // assume all peers are up-to-date
 
 
        config->cluster_undefined_sessions = 0;
        config->cluster_undefined_tunnels = 0;
        config->cluster_iam_uptodate = 1; // assume all peers are up-to-date
 

+       if (!num_peers) // lone master
+               advertise();
+

        // FIXME. We need to fix up the tunnel control message
        // queue here! There's a number of other variables we
        // should also update.
        // FIXME. We need to fix up the tunnel control message
        // queue here! There's a number of other variables we
        // should also update.


@@ -671,7 +673,7 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig
 
 
        if (config->cluster_undefined_sessions || 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",
+               LOG(2, 0, 0, "Cleared undefined sessions/tunnels. %d sess (high %d), %d tunn (high %d)\n",

                        config->cluster_undefined_sessions, highsession, config->cluster_undefined_tunnels, hightunnel);
                return;
        }
                        config->cluster_undefined_sessions, highsession, config->cluster_undefined_tunnels, hightunnel);
                return;
        }


@@ -682,7 +684,7 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig
                cluster_uptodate();
 }
 
                cluster_uptodate();
 }
 

-int hb_add_type(char **p, int type, int id)
+static int hb_add_type(char **p, int type, int id)

 {
        switch (type) {
                case C_CSESSION: { // Compressed C_SESSION.
 {
        switch (type) {
                case C_CSESSION: { // Compressed C_SESSION.


@@ -725,7 +727,7 @@ int hb_add_type(char **p, int type, int id)
                        (char*) &tunnel[id], sizeof(tunnelt));
                        break;
                default:
                        (char*) &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);
        }
                        kill(0, SIGTERM);
                        exit(1);
        }


@@ -745,6 +747,8 @@ void cluster_heartbeat()
        if (!config->cluster_iam_master)        // Only the master does this.
                return;
 
        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));
 
        // Fill out the heartbeat header.
        memset(&h, 0, sizeof(h));
 


@@ -760,6 +764,7 @@ void cluster_heartbeat()
        h.size_tunn = sizeof(tunnelt);
        h.interval = config->cluster_hb_interval;
        h.timeout  = config->cluster_hb_timeout;
        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, (char*) &h, sizeof(h));
 


@@ -768,7 +773,7 @@ void cluster_heartbeat()
        }
 
        if (p > (buff + sizeof(buff))) {        // Did we somehow manage to overun the buffer?
        }
 
        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", p - buff);

                kill(0, SIGTERM);
                exit(1);
        }
                kill(0, SIGTERM);
                exit(1);
        }


@@ -813,14 +818,16 @@ void cluster_heartbeat()
                //
                // Did we do something wrong?
        if (p > (buff + sizeof(buff))) {        // Did we somehow manage to overun the buffer?
                //
                // 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", p - buff);

                kill(0, SIGTERM);
                exit(1);
        }
 
                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(3, 0, 0, "Sending v%d heartbeat #%d, change #%llu with %d changes "
+                    "(%d x-sess, %d x-tunnels, %d highsess, %d hightun, size %d)\n",
+           HB_VERSION, h.seq, h.table_version, config->cluster_num_changes,
+           count, tcount, config->cluster_highest_sessionid,
+           config->cluster_highest_tunnelid, (p-buff));

 
        config->cluster_num_changes = 0;
 
 
        config->cluster_num_changes = 0;
 


@@ -832,7 +839,7 @@ void cluster_heartbeat()
 //
 // A structure of type 'type' has changed; Add it to the queue to send.
 //
 //
 // 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;
 
 {
        int i;
 


@@ -856,7 +863,7 @@ int type_changed(int type, int id)
 int cluster_send_session(int sid)
 {
        if (!config->cluster_iam_master) {
 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;
        }
 
                return -1;
        }
 


@@ -867,7 +874,7 @@ int cluster_send_session(int sid)
 int cluster_send_tunnel(int tid)
 {
        if (!config->cluster_iam_master) {
 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;
        }
 
                return -1;
        }
 


@@ -880,19 +887,19 @@ int cluster_send_tunnel(int tid)
 // missed a packet. We'll resend it every packet since
 // the last one it's seen.
 //
 // 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, u32 slave)

 {
        int s;
        int diff;
 
 {
        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);

 
        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!
 
        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.
        }
                        seq, config->cluster_seq_number);
                return peer_send_message(slave, C_KILL, seq, NULL, 0);// Kill the slave. Nothing else to do.
        }


@@ -901,8 +908,8 @@ int cluster_catchup_slave(int seq, u32 slave)
        while (seq != config->cluster_seq_number) {
                s = seq%HB_HISTORY_SIZE;
                if (seq != past_hearts[s].seq) {
        while (seq != config->cluster_seq_number) {
                s = seq%HB_HISTORY_SIZE;
                if (seq != past_hearts[s].seq) {

-                       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);
+                       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);
                        return -1;      // What to do here!?
                }
                peer_send_data(slave, past_hearts[s].data, past_hearts[s].size);


@@ -915,7 +922,7 @@ int cluster_catchup_slave(int seq, u32 slave)
 // We've heard from another peer! Add it to the list
 // that we select from at election time.
 //
 // 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 *pp, int size)
+static int cluster_add_peer(u32 peer, time_t basetime, pingt *pp, int size)

 {
        int i;
        u32 clusterid;
 {
        int i;
        u32 clusterid;


@@ -935,7 +942,7 @@ int cluster_add_peer(u32 peer, time_t basetime, pingt *pp, int size)
        if (clusterid != config->bind_address)
        {
                // Is this for us?
        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;
        }
 
                return 0;
        }
 


@@ -953,7 +960,7 @@ int cluster_add_peer(u32 peer, time_t basetime, pingt *pp, int size)
 
        // 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 && !basetime) {

-               log(3,0,0,0, "Master %s shutting down...\n", inet_toa(config->cluster_master_address));
+               LOG(3, 0, 0, "Master %s shutting down...\n", fmtaddr(config->cluster_master_address, 0));

                config->cluster_master_address = 0;
                config->cluster_last_hb = 0; // Force an election.
                cluster_check_master();
                config->cluster_master_address = 0;
                config->cluster_last_hb = 0; // Force an election.
                cluster_check_master();


@@ -962,7 +969,7 @@ int cluster_add_peer(u32 peer, time_t basetime, pingt *pp, int size)
 
        if (i >= num_peers)
        {
 
        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)
 
                // Not found. Is there a stale slot to re-use?
                for (i = 0; i < num_peers ; ++i)


@@ -977,7 +984,7 @@ int cluster_add_peer(u32 peer, time_t basetime, pingt *pp, int size)
                if (i >= CLUSTER_MAX_SIZE)
                {
                        // Too many peers!!
                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;
                }
 
                        return -1;
                }
 


@@ -988,7 +995,7 @@ int cluster_add_peer(u32 peer, time_t basetime, pingt *pp, int size)
                if (i == num_peers)
                        ++num_peers;
 
                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);

        }
 
        return 1;
        }
 
        return 1;


@@ -999,20 +1006,20 @@ int cluster_add_peer(u32 peer, time_t basetime, pingt *pp, int size)
 // 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.
 //
 // 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(char * data, int size)

 {
        bytest * b;
 
        b = (bytest*) data;
 
 {
        bytest * b;
 
        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) {
 
                                /* 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 */
                }
 
                        return -1; /* Abort processing */
                }
 


@@ -1028,7 +1035,7 @@ int cluster_handle_bytes(char * data, int size)
        }
 
        if (size != 0)
        }
 
        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;
 }
 
        return size;
 }


@@ -1039,13 +1046,13 @@ int cluster_handle_bytes(char * data, int size)
 static int cluster_recv_session(int more , u8 * p)
 {
        if (more >= MAXSESSION) {
 static int cluster_recv_session(int more , u8 * 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.
                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;
                }
                } else {
                        --config->cluster_undefined_sessions;
                }


@@ -1053,7 +1060,7 @@ static int cluster_recv_session(int more , u8 * p)
 
        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.
 
        if (!config->cluster_iam_uptodate)
                cluster_uptodate();     // Check to see if we're up to date.


@@ -1064,13 +1071,13 @@ static int cluster_recv_session(int more , u8 * p)
 static int cluster_recv_tunnel(int more, u8 *p)
 {
        if (more >= MAXTUNNEL) {
 static int cluster_recv_tunnel(int more, u8 *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.
                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;
                }
                } else {
                        --config->cluster_undefined_tunnels;
                }


@@ -1085,7 +1092,7 @@ static int cluster_recv_tunnel(int more, u8 *p)
        tunnel[more].controls = tunnel[more].controle = NULL;
        tunnel[more].controlc = 0;
 
        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.
 
        if (!config->cluster_iam_uptodate)
                cluster_uptodate();     // Check to see if we're up to date.


@@ -1097,19 +1104,21 @@ static int cluster_recv_tunnel(int more, u8 *p)
 //
 // Process a heartbeat..
 //
 //
 // Process a heartbeat..
 //

+// v3: added interval, timeout
+// v4: added table_version

 static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32 addr)
 {
        heartt * h;
        int s = size - (p-data);
        int i, type;
 
 static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32 addr)
 {
        heartt * h;
        int s = size - (p-data);
        int i, type;
 

-#if HB_VERSION != 3
+#if HB_VERSION != 4

 # error "need to update cluster_process_heartbeat()"
 #endif
 
 # 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 3 through 4
+       if (more < 3 || more > HB_VERSION) {
+               LOG(0, 0, 0, "Received a heartbeat version that I don't support (%d)!\n", more);

                return -1; // Ignore it??
        }
 
                return -1; // Ignore it??
        }
 


@@ -1127,21 +1136,39 @@ static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32
        if (config->cluster_iam_master) {       // Sanity...
                                // Note that this MUST match the election process above!
 
        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) {
                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.
                }
                        return -1; // Skip it.
                }

+
+               if (more >= 4) {
+                       if (h->table_version > config->cluster_table_version) {
+                               LOG(0, 0, 0, "They've seen more state changes (%llu vs my %llu) so I'm gone!\n",
+                                       h->table_version, config->cluster_table_version);
+
+                               kill(0, SIGTERM);
+                               exit(1);
+                       }
+                       if (h->table_version < config->cluster_table_version)
+                               return -1;
+               }
+

                if (basetime > h->basetime) {
                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);
                }
                        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);
                }
                        kill(0, SIGTERM);
                        exit(1);
                }

+

                return -1; // Skip it.
        }
 
                return -1; // Skip it.
        }
 


@@ -1151,7 +1178,7 @@ static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32
        config->cluster_last_hb = TIME; // Reset to ensure that we don't become master!!
 
        if (config->cluster_seq_number != h->seq) {     // Out of sequence heartbeat!
        config->cluster_last_hb = TIME; // Reset to ensure that we don't become master!!
 
        if (config->cluster_seq_number != h->seq) {     // Out of sequence heartbeat!

-               log(1,0,0,0, "HB: Got seq# %d but was expecting %d. asking for resend.\n", h->seq, config->cluster_seq_number);
+               LOG(1, 0, 0, "HB: Got seq# %d but was expecting %d. asking for resend.\n", h->seq, config->cluster_seq_number);

 
                peer_send_message(addr, C_LASTSEEN, config->cluster_seq_number, NULL, 0);
 
 
                peer_send_message(addr, C_LASTSEEN, config->cluster_seq_number, NULL, 0);
 


@@ -1174,23 +1201,20 @@ static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32
                        // that the free session pointer is correct.
        cluster_check_sessions(h->highsession, h->freesession, h->hightunnel);
 
                        // that the free session pointer is correct.
        cluster_check_sessions(h->highsession, h->freesession, 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...
        }
 
                // Ok. process the packet...


@@ -1214,7 +1238,7 @@ static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32
                                s -= (p - orig_p);
 
                                if (size != sizeof(sessiont) ) { // Ouch! Very very bad!
                                s -= (p - orig_p);
 
                                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;
                                }
                                                // Now what? Should exit! No-longer up to date!
                                        break;
                                }


@@ -1241,7 +1265,7 @@ static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32
                                s -= (p - orig_p);
 
                                if (size != sizeof(tunnelt) ) { // Ouch! Very very bad!
                                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");
+                                       LOG(0, 0, 0, "DANGER: Received a CSESSION that didn't decompress correctly!\n");

                                                // Now what? Should exit! No-longer up to date!
                                        break;
                                }
                                                // Now what? Should exit! No-longer up to date!
                                        break;
                                }


@@ -1260,24 +1284,25 @@ static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32
                                s -= sizeof(tunnel[more]);
                                break;
                        default:
                                s -= sizeof(tunnel[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!!
                }
        }
                                return -1; // can't process any more of the packet!!
                }
        }

+

        if (config->cluster_master_address != addr)
        {
        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_last_hb = TIME; // Successfully received a heartbeat!

+       config->cluster_table_version = h->table_version;

        return 0;
 
 shortpacket:
        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;
 }
 
        return -1;
 }
 


@@ -1294,7 +1319,7 @@ int processcluster(char * data, int size, u32 addr)
        if (addr == my_address)
                return -1;      // Ignore it. Something looped back the multicast!
 
        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 <= 0)     // Any data there??
                return -1;


@@ -1326,18 +1351,18 @@ int processcluster(char * data, int size, u32 addr)
                p += sizeof(int);
 
                if (!config->cluster_iam_master) { // huh?
                p += sizeof(int);
 
                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));
+                       LOG(0, 0, 0, "I'm not the master, but I got a C_FORWARD from %s?\n", fmtaddr(addr, 0));

                        return -1;
                }
 
                        return -1;
                }
 

-               log(4,0,0,0, "Got a forwarded packet... (%s:%d)\n", inet_toa(more), a.sin_port);
+               LOG(4, 0, 0, "Got a forwarded packet... (%s:%d)\n", fmtaddr(more, 0), a.sin_port);

                STAT(recv_forward);
                processudp(p, s, &a);
                return 0;
        }
        case C_THROTTLE: {      // Receive a forwarded packet from a slave.
                if (!config->cluster_iam_master) {
                STAT(recv_forward);
                processudp(p, s, &a);
                return 0;
        }
        case C_THROTTLE: {      // Receive a forwarded packet from a slave.
                if (!config->cluster_iam_master) {

-                       log(0,0,0,0, "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;
                }
 
                        return -1;
                }
 


@@ -1347,7 +1372,7 @@ int processcluster(char * data, int size, u32 addr)
        case C_GARDEN:
                // Receive a walled garden packet from a slave.
                if (!config->cluster_iam_master) {
        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 -1;
                }
 


@@ -1359,37 +1384,37 @@ int processcluster(char * data, int size, u32 addr)
 
        case C_KILL:    // The master asked us to die!? (usually because we're too out of date).
                if (config->cluster_iam_master) {
 
        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) {
                        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) {
                        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!
                }
 
                        // 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:
                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:
                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:
                return -1;
        }
        return 0;
 
 shortpacket:

-       log(0,0,0,0, "I got a _short_ 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;
 }
 
        return -1;
 }
 


@@ -1403,20 +1428,24 @@ int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc)
                return CLI_HELP_NO_ARGS;
 
        cli_print(cli, "Cluster status   : %s", config->cluster_iam_master ? "Master" : "Slave" );
                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, "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) {
                cli_print(cli, "My master        : %s (last heartbeat %.1f seconds old)",
        cli_print(cli, "Multicast i'face : %s", config->cluster_interface);
 
        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");
                        0.1 * (TIME - config->cluster_last_hb));
                cli_print(cli, "Uptodate         : %s", config->cluster_iam_uptodate ? "Yes" : "No");

+               cli_print(cli, "Table version #  : %llu", config->cluster_table_version);

                cli_print(cli, "Next sequence number expected: %d", config->cluster_seq_number);
                cli_print(cli, "%d sessions undefined of %d", config->cluster_undefined_sessions, config->cluster_highest_sessionid);
                cli_print(cli, "%d tunnels undefined of %d", config->cluster_undefined_tunnels, config->cluster_highest_tunnelid);
        } else {
                cli_print(cli, "Next sequence number expected: %d", config->cluster_seq_number);
                cli_print(cli, "%d sessions undefined of %d", config->cluster_undefined_sessions, config->cluster_highest_sessionid);
                cli_print(cli, "%d tunnels undefined of %d", config->cluster_undefined_tunnels, config->cluster_highest_tunnelid);
        } else {

+               cli_print(cli, "Table version #  : %llu", config->cluster_table_version);

                cli_print(cli, "Next heartbeat # : %d", config->cluster_seq_number);
                cli_print(cli, "Highest session  : %d", config->cluster_highest_sessionid);
                cli_print(cli, "Highest tunnel   : %d", config->cluster_highest_tunnelid);
                cli_print(cli, "Next heartbeat # : %d", config->cluster_seq_number);
                cli_print(cli, "Highest session  : %d", config->cluster_highest_sessionid);
                cli_print(cli, "Highest tunnel   : %d", config->cluster_highest_tunnelid);


@@ -1427,7 +1456,7 @@ int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc)
        if (num_peers)
                cli_print(cli, "%20s  %10s %8s", "Address", "Basetime", "Age");
        for (i = 0; i < num_peers; ++i) {
        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  %10d %8d", fmtaddr(peers[i].peer, 0),

                        peers[i].basetime, TIME - peers[i].timestamp);
        }
        return CLI_OK;
                        peers[i].basetime, TIME - peers[i].timestamp);
        }
        return CLI_OK;


@@ -1452,7 +1481,7 @@ int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc)
 //
 // Worst case is a 50% expansion in space required (trying to
 // compress { 0x00, 0x01 } * N )
 //
 // 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(u8 ** src_p, int ssize, u8 *dst, int dsize)

 {
        int count;
        int orig_dsize = dsize;
 {
        int count;
        int orig_dsize = dsize;


@@ -1498,7 +1527,7 @@ int rle_compress(u8 ** src_p, int ssize, u8 *dst, int dsize)
 // Return the number of dst bytes used.
 // Updates the 'src_p' pointer to point to the
 // first un-used byte.
 // 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(u8 ** src_p, int ssize, u8 *dst, int dsize)

 {
        int count;
        int orig_dsize = dsize;
 {
        int count;
        int orig_dsize = dsize;