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limit maxPexMessageSize based on maxAddressSize

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Ethan Buchman
2018-04-28 14:41:36 -04:00
parent f645187122
commit 32268a8135
1 changed files with 8 additions and 4 deletions
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p2p/pex/pex_reactor.go
+8 -4
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@@ -20,10 +20,14 @@ const (
// PexChannel is a channel for PEX messages
PexChannel = byte(0x00)
// TODO: make smaller. Should match the maxGetSelection
// this is basically the amplification factor since a request
// msg is like 1 byte ... it can cause us to send msgs of this size!
maxPexMessageSize = 1048576 // 1MB
// over-estimate of max NetAddress size
// hexID (40) + IP (16) + Port (2) + Name (100) ...
// NOTE: dont use massive DNS name ..
maxAddressSize = 256
// NOTE: amplificaiton factor!
// small request results in up to maxPexMessageSize response
maxPexMessageSize = maxAddressSize * maxGetSelection
// ensure we have enough peers
defaultEnsurePeersPeriod = 30 * time.Second