TrueCloudLab/neoneo-go
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network: do not allow to request invalid block count

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The problem is in peer disconnection due to invalid GetBlockByIndex
payload (the logs are from some patched neo-go version):
```
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.490Z        INFO        new peer connected        {"addr": "10.78.69.115:50846", "peerCount": 3}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.490Z        WARN        peer disconnected        {"addr": "10.78.69.115:50846", "error": "invalid block count", "peerCount": 2}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.490Z        INFO        started protocol        {"addr": "10.78.69.115:50846", "userAgent": "/NEO-GO:1.0.0/", "startHeight": 0, "id": 1339571820}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.491Z        INFO        new peer connected        {"addr": "10.78.69.115:50856", "peerCount": 3}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.492Z        WARN        peer disconnected        {"addr": "10.78.69.115:50856", "error": "invalid block count", "peerCount": 2}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.492Z        INFO        started protocol        {"addr": "10.78.69.115:50856", "userAgent": "/NEO-GO:1.0.0/", "startHeight": 0, "id": 1339571820}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.492Z        INFO        new peer connected        {"addr": "10.78.69.115:50858", "peerCount": 3}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.493Z        INFO        started protocol        {"addr": "10.78.69.115:50858", "userAgent": "/NEO-GO:1.0.0/", "startHeight": 0, "id": 1339571820}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.493Z        WARN        peer disconnected        {"addr": "10.78.69.115:50858", "error": "invalid block count", "peerCount": 2}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.494Z        INFO        new peer connected        {"addr": "10.78.69.115:50874", "peerCount": 3}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.494Z        INFO        started protocol        {"addr": "10.78.69.115:50874", "userAgent": "/NEO-GO:1.0.0/", "startHeight": 0, "id": 1339571820}
дек 15 16:02:39 glagoli neo-go[928530]: 2022-12-15T16:02:39.494Z        WARN        peer disconnected        {"addr": "10.78.69.115:50874", "error": "invalid block count", "peerCount": 2}
```

GetBlockByIndex payload can't be decoded, and the only possible cause
is zero (or <-1, but it's probably not the case) block count requested.

Error is improved as far.
This commit is contained in:
Anna Shaleva 2022-12-15 20:10:09 +03:00
parent c0a453a53b
commit 9b364aa7ee
4 changed files with 29 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

14
pkg/network/server.go
View file

@ -1247,13 +1247,15 @@ func (s *Server) handleGetAddrCmd(p Peer) error {
// 2. Send requests for chunk in increasing order.
// 3. After all requests have been sent, request random height.
func (s *Server) requestBlocks(bq Blockqueuer, p Peer) error {
h := bq.BlockHeight()
pl := getRequestBlocksPayload(p, h, &s.lastRequestedBlock)
lq := s.bQueue.lastQueued()
pl := getRequestBlocksPayload(p, bq.BlockHeight(), &s.lastRequestedBlock)
lq, capLeft := s.bQueue.lastQueued()
if capLeft == 0 {
// No more blocks will fit into the queue.
return nil
}
if lq >= pl.IndexStart {
c := int16(h + blockCacheSize - lq)
if c < payload.MaxHashesCount {
pl.Count = c
if capLeft < payload.MaxHashesCount {
pl.Count = int16(capLeft)
}
pl.IndexStart = lq + 1
}