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eth/fetcher: discard block 0 notifications #22658

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Merged
holiman merged 1 commit into from
Oct 31, 2021
Merged

eth/fetcher: discard block 0 notifications #22658

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13 changes: 7 additions & 6 deletions eth/fetcher/block_fetcher.go
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Original file line number Diff line number Diff line change
Expand Up @@ -391,13 +391,14 @@ func (f *BlockFetcher) loop() {
blockAnnounceDOSMeter.Mark(1)
break
}
if notification.number == 0 {
break
}
// If we have a valid block number, check that it's potentially useful
if notification.number > 0 {
if dist := int64(notification.number) - int64(f.chainHeight()); dist < -maxUncleDist || dist > maxQueueDist {
log.Debug("Peer discarded announcement", "peer", notification.origin, "number", notification.number, "hash", notification.hash, "distance", dist)
blockAnnounceDropMeter.Mark(1)
break
}
if dist := int64(notification.number) - int64(f.chainHeight()); dist < -maxUncleDist || dist > maxQueueDist {
log.Debug("Peer discarded announcement", "peer", notification.origin, "number", notification.number, "hash", notification.hash, "distance", dist)
blockAnnounceDropMeter.Mark(1)
break
}
// All is well, schedule the announce if block's not yet downloading
if _, ok := f.fetching[notification.hash]; ok {
Expand Down