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eth/protocols/eth: handle zero-count header requests (#30305)

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Proper fix for handling `count=0` get header requests. 

https://en.wikipedia.org/wiki/Count_Zero
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Martin HS 2024-08-21 09:22:33 +02:00 committed by GitHub
parent df645e77b7
commit 733fcbbc65
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eth/protocols/eth/handlers.go
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@ -42,6 +42,9 @@ func handleGetBlockHeaders(backend Backend, msg Decoder, peer *Peer) error {
// ServiceGetBlockHeadersQuery assembles the response to a header query. It is
// exposed to allow external packages to test protocol behavior.
func ServiceGetBlockHeadersQuery(chain *core.BlockChain, query *GetBlockHeadersRequest, peer *Peer) []rlp.RawValue {
if query.Amount == 0 {
return nil
}
if query.Skip == 0 {
// The fast path: when the request is for a contiguous segment of headers.
return serviceContiguousBlockHeaderQuery(chain, query)