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network: restrict block queue size

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Close #1374.
This commit is contained in:
Evgenii Stratonikov 2020-09-02 15:00:53 +03:00
parent 7560aa345a
commit 98ca17aab8
2 changed files with 11 additions and 1 deletions
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9
pkg/network/blockqueue.go
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@ -15,6 +15,12 @@ type blockQueue struct {
relayF func(*block.Block)
}
const (
// blockCacheSize is the amount of blocks above current height
// which are stored in queue.
blockCacheSize = 2000
)
func newBlockQueue(capacity int, bc blockchainer.Blockchainer, log *zap.Logger, relayer func(*block.Block)) *blockQueue {
if log == nil {
return nil
@ -66,7 +72,8 @@ func (bq *blockQueue) run() {
}
func (bq *blockQueue) putBlock(block *block.Block) error {
if bq.chain.BlockHeight() >= block.Index {
h := bq.chain.BlockHeight()
if block.Index <= h || h+blockCacheSize < block.Index {
// can easily happen when fetching the same blocks from
// different peers, thus not considered as error
return nil

3
pkg/network/blockqueue_test.go
View file

@ -31,6 +31,9 @@ func TestBlockQueue(t *testing.T) {
// but they're still not put into the blockchain, because bq isn't running
assert.Equal(t, uint32(0), chain.BlockHeight())
assert.Equal(t, 4, bq.length())
// block with too big index is dropped
assert.NoError(t, bq.putBlock(&block.Block{Base: block.Base{Index: bq.chain.BlockHeight() + blockCacheSize + 1}}))
assert.Equal(t, 4, bq.length())
go bq.run()
// run() is asynchronous, so we need some kind of timeout anyway and this is the simplest one
for i := 0; i < 5; i++ {