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eth/downloader: add a basic block download congestion control

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This commit is contained in:
Péter Szilágyi
2015-06-03 14:39:21 +03:00
parent 9085b10508
commit c9a546c310
5 changed files with 67 additions and 55 deletions
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22
eth/downloader/downloader_test.go
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@@ -191,7 +191,7 @@ func (dl *downloadTester) badBlocksPeer(id string, td *big.Int, hash common.Hash
func TestDownload(t *testing.T) {
minDesiredPeerCount = 4
blockTTL = 1 * time.Second
blockHardTTL = 1 * time.Second
targetBlocks := 1000
hashes := createHashes(0, targetBlocks)
@@ -240,7 +240,7 @@ func TestMissing(t *testing.T) {
func TestTaking(t *testing.T) {
minDesiredPeerCount = 4
blockTTL = 1 * time.Second
blockHardTTL = 1 * time.Second
targetBlocks := 1000
hashes := createHashes(0, targetBlocks)
@@ -281,7 +281,7 @@ func TestInactiveDownloader(t *testing.T) {
func TestCancel(t *testing.T) {
minDesiredPeerCount = 4
blockTTL = 1 * time.Second
blockHardTTL = 1 * time.Second
targetBlocks := 1000
hashes := createHashes(0, targetBlocks)
@@ -307,7 +307,7 @@ func TestCancel(t *testing.T) {
func TestThrottling(t *testing.T) {
minDesiredPeerCount = 4
blockTTL = 1 * time.Second
blockHardTTL = 1 * time.Second
targetBlocks := 16 * blockCacheLimit
hashes := createHashes(0, targetBlocks)
@@ -461,7 +461,7 @@ func TestInvalidHashOrderAttack(t *testing.T) {
// Tests that if a malicious peer makes up a random hash chain and tries to push
// indefinitely, it actually gets caught with it.
func TestMadeupHashChainAttack(t *testing.T) {
blockTTL = 100 * time.Millisecond
blockSoftTTL = 100 * time.Millisecond
crossCheckCycle = 25 * time.Millisecond
// Create a long chain of hashes without backing blocks
@@ -495,10 +495,10 @@ func TestMadeupHashChainDrippingAttack(t *testing.T) {
// Tests that if a malicious peer makes up a random block chain, and tried to
// push indefinitely, it actually gets caught with it.
func TestMadeupBlockChainAttack(t *testing.T) {
defaultBlockTTL := blockTTL
defaultBlockTTL := blockSoftTTL
defaultCrossCheckCycle := crossCheckCycle
blockTTL = 100 * time.Millisecond
blockSoftTTL = 100 * time.Millisecond
crossCheckCycle = 25 * time.Millisecond
// Create a long chain of blocks and simulate an invalid chain by dropping every second
@@ -516,7 +516,7 @@ func TestMadeupBlockChainAttack(t *testing.T) {
t.Fatalf("synchronisation error mismatch: have %v, want %v", err, ErrCrossCheckFailed)
}
// Ensure that a valid chain can still pass sync
blockTTL = defaultBlockTTL
blockSoftTTL = defaultBlockTTL
crossCheckCycle = defaultCrossCheckCycle
tester.hashes = hashes
@@ -530,10 +530,10 @@ func TestMadeupBlockChainAttack(t *testing.T) {
// attacker make up a valid hashes for random blocks, but also forges the block
// parents to point to existing hashes.
func TestMadeupParentBlockChainAttack(t *testing.T) {
defaultBlockTTL := blockTTL
defaultBlockTTL := blockSoftTTL
defaultCrossCheckCycle := crossCheckCycle
blockTTL = 100 * time.Millisecond
blockSoftTTL = 100 * time.Millisecond
crossCheckCycle = 25 * time.Millisecond
// Create a long chain of blocks and simulate an invalid chain by dropping every second
@@ -550,7 +550,7 @@ func TestMadeupParentBlockChainAttack(t *testing.T) {
t.Fatalf("synchronisation error mismatch: have %v, want %v", err, ErrCrossCheckFailed)
}
// Ensure that a valid chain can still pass sync
blockTTL = defaultBlockTTL
blockSoftTTL = defaultBlockTTL
crossCheckCycle = defaultCrossCheckCycle
tester.blocks = blocks