forks/go-ethereum
1
0
Fork 1
mirror of https://github.com/ethereum/go-ethereum.git synced 2026-08-20 10:52:25 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

p2p/discover: slow down lookups on empty table

Browse source
This commit is contained in:
Felix Lange 2019-11-25 15:37:24 +01:00
parent fdff182f11
commit 88fe4b58f6
1 changed files with 7 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
p2p/discover/lookup.go
View file

@ -18,6 +18,7 @@ package discover
import (
"context"
"time"
"github.com/ethereum/go-ethereum/p2p/enode"
)
@ -106,6 +107,12 @@ func (it *lookup) startQueries() bool {
it.tab.mutex.Lock()
closest := it.tab.closest(it.result.target, bucketSize, false)
it.tab.mutex.Unlock()
// Avoid finishing the lookup too quickly if table is empty. It'd be better to wait
// for the table to fill in this case, but there is no good mechanism for that
// yet.
if len(closest.entries) == 0 {
time.Sleep(1 * time.Second)
}
it.queries = 1
it.replyCh <- closest.entries
return true