X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/e9111645af13262ae2bcdd92601f3b672ee0a00d..5ff54415c95f70115272ea65263e1a4a654da57e:/cluster.c

diff --git a/cluster.c b/cluster.c
index 6f72394..48c2059 100644
--- a/cluster.c
+++ b/cluster.c
@@ -1,6 +1,6 @@
 // L2TPNS Clustering Stuff
 
-char const *cvs_id_cluster = "$Id: cluster.c,v 1.26.2.6 2005/05/21 13:05:36 bodea Exp $";
+char const *cvs_id_cluster = "$Id: cluster.c,v 1.26.2.9 2005/05/23 12:48:17 bodea Exp $";
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -903,11 +903,10 @@ static int cluster_catchup_slave(int seq, in_addr_t slave)
 
 	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! Sending a null PING.\n");
-			// Send a ping to the stray slave saying that we're a master that's
-			// just shutdown. This should force the slave to listen for the real
-			// master.
-		peer_send_message(slave, C_PING, 0, NULL, 0);
+		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;
 	}
 
@@ -978,8 +977,10 @@ static int cluster_add_peer(in_addr_t peer, time_t basetime, pingt *pp, int size
 	}
 
 	// Is this the master shutting down??
-	if (peer == config->cluster_master_address && !basetime) {
-		LOG(3, 0, 0, "Master %s shutting down...\n", fmtaddr(config->cluster_master_address, 0));
+	if (peer == config->cluster_master_address) {
+		LOG(3, 0, 0, "Master %s %s\n", fmtaddr(config->cluster_master_address, 0),
+			basetime ? "has restarted!" : "shutting down...");
+
 		config->cluster_master_address = 0;
 		config->cluster_last_hb = 0; // Force an election.
 		cluster_check_master();
@@ -1020,6 +1021,20 @@ static int cluster_add_peer(in_addr_t peer, time_t basetime, pingt *pp, int size
 	return 1;
 }
 
+// A slave responds with C_MASTER when it gets a message which should have gone to a master.
+static int cluster_set_master(in_addr_t peer, in_addr_t master)
+{
+	if (config->cluster_iam_master)	// Sanity...
+		return 0;
+
+	LOG(3, 0, 0, "Peer %s set the master to %s...\n", fmtaddr(peer, 0),
+		fmtaddr(master, 1));
+
+	config->cluster_master_address = master;
+	cluster_check_master();
+	return 0;
+}
+
 /* Handle the slave updating the byte counters for the master. */
 //
 // Note that we don't mark the session as dirty; We rely on
@@ -1394,10 +1409,13 @@ int processcluster(char *data, int size, in_addr_t addr)
 	s -= sizeof(uint32_t);
 
 	switch (type) {
-	case C_PING:	// Update the peers table.
+	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.
@@ -1438,6 +1456,11 @@ int processcluster(char *data, int size, in_addr_t addr)
 		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).