Fix deletion from linked list.

[l2tpns.git] / cluster.c

diff --git a/cluster.c b/cluster.c
index ca9b241..f15127d 100644 (file)
--- a/cluster.c
+++ b/cluster.c
@@ -1,6 +1,6 @@
 // L2TPNS Clustering Stuff
 
-char const *cvs_id_cluster = "$Id: cluster.c,v 1.16 2004-11-05 04:55:26 bodea Exp $";
+char const *cvs_id_cluster = "$Id: cluster.c,v 1.18 2004-11-16 07:54:32 bodea Exp $";
 
 #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.
 
-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
@@ -147,7 +147,7 @@ int cluster_init()
 // address ).
 //
 
-int cluster_send_data(void *data, int datalen)
+static int cluster_send_data(void *data, int datalen)
 {
        struct sockaddr_in addr = {0};
 
@@ -188,7 +188,19 @@ 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;
@@ -199,21 +211,14 @@ void cluster_uptodate(void)
        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.
+       advertise();
 }
 
 //
 // 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};
 
@@ -241,7 +246,7 @@ int peer_send_data(u32 peer, char * data, int size)
 //
 // 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;
@@ -456,11 +461,9 @@ void cluster_check_slaves(void)
        }
 
 #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 */
 }
 
@@ -610,6 +613,9 @@ void cluster_check_master(void)
        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.
@@ -675,7 +681,7 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig
                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.
@@ -825,7 +831,7 @@ void cluster_heartbeat()
 //
 // 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;
 
@@ -873,7 +879,7 @@ int cluster_send_tunnel(int tid)
 // 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;
@@ -908,7 +914,7 @@ 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.
 //
-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;
@@ -992,7 +998,7 @@ 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.
 //
-int cluster_handle_bytes(char * data, int size)
+static int cluster_handle_bytes(char * data, int size)
 {
        bytest * b;
 
@@ -1445,7 +1451,7 @@ 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 )
-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;
@@ -1491,7 +1497,7 @@ 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.
-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;