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eth, eth/downloader: detect and handle madeup hash attacks

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This commit is contained in:
Péter Szilágyi
2015-05-15 13:14:46 +03:00
parent 9ad515d2dc
commit 83226762c2
4 changed files with 111 additions and 44 deletions
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10
eth/downloader/queue.go
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@ -123,13 +123,13 @@ func (q *queue) Has(hash common.Hash) bool {
}
// Insert adds a set of hashes for the download queue for scheduling, returning
// the number of new hashes encountered.
func (q *queue) Insert(hashes []common.Hash) int {
// the new hashes encountered.
func (q *queue) Insert(hashes []common.Hash) []common.Hash {
q.lock.Lock()
defer q.lock.Unlock()
// Insert all the hashes prioritized in the arrival order
inserts := 0
inserts := make([]common.Hash, 0, len(hashes))
for _, hash := range hashes {
// Skip anything we already have
if old, ok := q.hashPool[hash]; ok {
@ -137,7 +137,9 @@ func (q *queue) Insert(hashes []common.Hash) int {
continue
}
// Update the counters and insert the hash
q.hashCounter, inserts = q.hashCounter+1, inserts+1
q.hashCounter = q.hashCounter + 1
inserts = append(inserts, hash)
q.hashPool[hash] = q.hashCounter
q.hashQueue.Push(hash, float32(q.hashCounter)) // Highest gets schedules first
}