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server: add new peers within OnVerAck instead of within OnVersion

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This change is needed as part of requiring peers to also send a verack
message following their version message during protocol negotiation.
Peers were previously added to the SyncManager before their message
queues were started, causing the server to stall if a peer didn't
provide a timely verack response following their version. We now do this
within OnVerAck, which happens shortly before peer message queues are
started.
This commit is contained in:
Wilmer Paulino 2019-10-11 18:19:59 -04:00
parent 11b84f5cb5
commit a1a5bfa819
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GPG key ID: 6DF57B9F9514972F
1 changed files with 7 additions and 2 deletions
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9
server.go
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@ -494,11 +494,15 @@ func (sp *serverPeer) OnVersion(_ *peer.Peer, msg *wire.MsgVersion) *wire.MsgRej
// is received. // is received.
sp.setDisableRelayTx(msg.DisableRelayTx) sp.setDisableRelayTx(msg.DisableRelayTx)
// Add valid peer to the server.
sp.server.AddPeer(sp)
return nil return nil
} }
// OnVerAck is invoked when a peer receives a verack bitcoin message and is used
// to kick start communication with them.
func (sp *serverPeer) OnVerAck(_ *peer.Peer, _ *wire.MsgVerAck) {
sp.server.AddPeer(sp)
}
// OnMemPool is invoked when a peer receives a mempool bitcoin message. // OnMemPool is invoked when a peer receives a mempool bitcoin message.
// It creates and sends an inventory message with the contents of the memory // It creates and sends an inventory message with the contents of the memory
// pool up to the maximum inventory allowed per message. When the peer has a // pool up to the maximum inventory allowed per message. When the peer has a
@ -1966,6 +1970,7 @@ func newPeerConfig(sp *serverPeer) *peer.Config {
return &peer.Config{ return &peer.Config{
Listeners: peer.MessageListeners{ Listeners: peer.MessageListeners{
OnVersion: sp.OnVersion, OnVersion: sp.OnVersion,
OnVerAck: sp.OnVerAck,
OnMemPool: sp.OnMemPool, OnMemPool: sp.OnMemPool,
OnTx: sp.OnTx, OnTx: sp.OnTx,
OnBlock: sp.OnBlock, OnBlock: sp.OnBlock,