Make maxmtu equal to minmtu when fixing the path MTU to a node.

This ensures MTU probes used to ping nodes are not too large, and prevents
restarting MTU probing unnecessarily.

diff --git a/src/net_packet.c b/src/net_packet.c
index 626f8b1cdbfb55fe357a0369cfa3ee0591bad386..3466f87ee975a3aaf5a6d249542577b671038887 100644 (file)
--- a/src/net_packet.c
+++ b/src/net_packet.c
@@ -91,6 +91,10 @@ void send_mtu_probe(node_t *n) {
        }
 
        if(n->mtuprobes == 30 || (n->mtuprobes < 30 && n->minmtu >= n->maxmtu)) {
+               if(n->minmtu > n->maxmtu)
+                       n->minmtu = n->maxmtu;
+               else
+                       n->maxmtu = n->minmtu;
                n->mtu = n->minmtu;
                ifdebug(TRAFFIC) logger(LOG_INFO, "Fixing MTU of %s (%s) to %d after %d probes", n->name, n->hostname, n->mtu, n->mtuprobes);
                n->mtuprobes = 31;