eth/downloader: short circuit sync if head hash is banned

2015-05-29 21:15:28 +03:00 · 2015-05-29 21:15:28 +03:00 · abdfcda4dd
parent 84bc93d8cb
commit abdfcda4dd
1 changed files with 4 additions and 0 deletions
--- a/eth/downloader/downloader.go
+++ b/eth/downloader/downloader.go
@ -165,6 +165,10 @@ func (d *Downloader) Synchronise(id string, hash common.Hash) error {
 	}
 	defer atomic.StoreInt32(&d.synchronising, 0)

+	// If the head hash is banned, terminate immediately
+	if d.banned.Has(hash) {
+		return ErrInvalidChain
+	}
 	// Post a user notification of the sync (only once per session)
 	if atomic.CompareAndSwapInt32(&d.notified, 0, 1) {
 		glog.V(logger.Info).Infoln("Block synchronisation started")