check next_ping_time before pinging

diff --git a/src/net_db.cc b/src/net_db.cc
index cef78cedd64c0a0da00090a44dddb3a03d6dca58..f984cb8ba2b4ecc8450e4a87b55e486d4cec5ad6 100644 (file)
--- a/src/net_db.cc
+++ b/src/net_db.cc
@@ -197,6 +197,10 @@ netdbSendPing(int fdunused, ipcache_addrs * ia, void *data)
 void
 netdbPingSite(char *hostname)
 {
+    netdbEntry *n;
+    if ((n = netdbLookupHost(hostname)) != NULL)
+       if (n->next_ping_time > squid_curtime)
+           return;
     ipcache_nbgethostbyname(hostname,
        -1,
        netdbSendPing,