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[sentry] Enforce max protocol version as well as min protocol version (#2525)

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Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>
This commit is contained in:
ledgerwatch 2021-08-13 16:51:18 +01:00 committed by GitHub
parent 39e066a121
commit 1135e2b4fb
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1 changed files with 3 additions and 0 deletions
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3
cmd/sentry/download/sentry.go
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@ -194,6 +194,9 @@ func handShake(
if uint(reply.ProtocolVersion) < minVersion {
return fmt.Errorf("version is less than allowed minimum: theirs %d, min %d", reply.ProtocolVersion, minVersion)
}
if uint(reply.ProtocolVersion) > version {
return fmt.Errorf("version is more than what this senty supports: theirs %d, max %d", reply.ProtocolVersion, version)
}
if reply.Genesis != genesisHash {
return fmt.Errorf("genesis hash does not match: theirs %x, ours %x", reply.Genesis, genesisHash)
}