public async Task DialBackPeer_Test()
{
AElfPeerEndpointHelper.TryParse("127.0.0.1:2000", out var endpoint);
var handshake = await _handshakeProvider.GetHandshakeAsync();
var grpcPeer = await _peerDialer.DialBackPeerAsync(endpoint, handshake);
grpcPeer.ShouldNotBeNull();
grpcPeer.CurrentBlockHash.ShouldBe(handshake.HandshakeData.BestChainHash);
grpcPeer.CurrentBlockHeight.ShouldBe(handshake.HandshakeData.BestChainHeight);
grpcPeer.LastKnownLibHeight.ShouldBe(handshake.HandshakeData.LastIrreversibleBlockHeight);
grpcPeer.Info.Pubkey.ShouldBe(handshake.HandshakeData.Pubkey.ToHex());
grpcPeer.Info.ProtocolVersion.ShouldBe(handshake.HandshakeData.Version);
}
public async Task <HandshakeReply> DoHandshakeAsync(DnsEndPoint endpoint, Handshake handshake)
{
// validate the handshake (signature, chain id...)
var handshakeValidationResult = await _handshakeProvider.ValidateHandshakeAsync(handshake);
if (handshakeValidationResult != HandshakeValidationResult.Ok)
{
var handshakeError = GetHandshakeError(handshakeValidationResult);
return(new HandshakeReply {
Error = handshakeError
});
}
var pubkey = handshake.HandshakeData.Pubkey.ToHex();
// remove any remaining connection to the peer (before the check
// that we have room for more connections)
var currentPeer = _peerPool.FindPeerByPublicKey(pubkey);
if (currentPeer != null)
{
_peerPool.RemovePeer(pubkey);
await currentPeer.DisconnectAsync(false);
}
try
{
// mark the (IP; pubkey) pair as currently handshaking
if (!_peerPool.AddHandshakingPeer(endpoint.Host, pubkey))
{
return new HandshakeReply {
Error = HandshakeError.ConnectionRefused
}
}
;
// create the connection to the peer
var peerEndpoint = new AElfPeerEndpoint(endpoint.Host, handshake.HandshakeData.ListeningPort);
var grpcPeer = await _peerDialer.DialBackPeerAsync(peerEndpoint, handshake);
// add the new peer to the pool
if (!_peerPool.TryAddPeer(grpcPeer))
{
Logger.LogWarning($"Stopping connection, peer already in the pool {grpcPeer.Info.Pubkey}.");
await grpcPeer.DisconnectAsync(false);
return(new HandshakeReply {
Error = HandshakeError.RepeatedConnection
});
}
Logger.LogDebug($"Added to pool {grpcPeer.RemoteEndpoint} - {grpcPeer.Info.Pubkey}.");
// send back our handshake
var replyHandshake = await _handshakeProvider.GetHandshakeAsync();
grpcPeer.InboundSessionId = replyHandshake.SessionId.ToByteArray();
grpcPeer.UpdateLastSentHandshake(replyHandshake);
return(new HandshakeReply {
Handshake = replyHandshake, Error = HandshakeError.HandshakeOk
});
}
finally
{
// remove the handshaking mark (IP; pubkey)
_peerPool.RemoveHandshakingPeer(endpoint.Host, pubkey);
}
}