public void HandleHello(HelloMessage hello)
{
Logger.Info($"{P2PSession.RemoteNodeId} P2P received hello.");
if (!hello.NodeId.Equals(P2PSession.RemoteNodeId))
{
throw new NodeDetailsMismatchException();
}
//P2PSession.RemoteNodeId = hello.NodeId;
//P2PSession.RemotePort = hello.ListenPort;
RemoteClientId = hello.ClientId;
Logger.Info(!_sentHello
? $"{P2PSession.RemoteNodeId} P2P initiating inbound {hello.Protocol} v{hello.P2PVersion} protocolHandler on {hello.ListenPort} ({hello.ClientId})"
: $"{P2PSession.RemoteNodeId} P2P initiating outbound {hello.Protocol} v{hello.P2PVersion} protocolHandler on {hello.ListenPort} ({hello.ClientId})");
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-8.md
// Clients implementing a newer version simply send a packet with higher version and possibly additional list elements.
// * If such a packet is received by a node with lower version, it will blindly assume that the remote end is backwards-compatible and respond with the old handshake.
// * If the packet is received by a node with equal version, new features of the protocol can be used.
// * If the packet is received by a node with higher version, it can enable backwards-compatibility logic or drop the connection.
//Moved that validation to PeerManager
//if (hello.P2PVersion < 4 || hello.P2PVersion > 5)
//{
// //triggers disconnect on the session, which will trigger it on all protocol handlers
// P2PSession.InitiateDisconnectAsync(DisconnectReason.IncompatibleP2PVersion);
// //Disconnect(DisconnectReason.IncompatibleP2PVersion);
// return;
//}
ProtocolVersion = hello.P2PVersion;
//TODO Check required capabilities and disconnect if not supported
foreach (Capability remotePeerCapability in hello.Capabilities)
{
if (SupportedCapabilities.Contains(remotePeerCapability))
{
Logger.Info($"{P2PSession.RemoteNodeId} Agreed on {remotePeerCapability.ProtocolCode} v{remotePeerCapability.Version}");
AgreedCapabilities.Add(remotePeerCapability);
}
else
{
Logger.Info($"{P2PSession.RemoteNodeId} Capability not supported {remotePeerCapability.ProtocolCode} v{remotePeerCapability.Version}");
}
}
//if (!_sentHello)
//{
// throw new InvalidOperationException($"Handling {nameof(HelloMessage)} from peer before sending our own");
//}
_isInitialized = true;
ReceivedProtocolInitMsg(hello);
var eventArgs = new P2PProtocolInitializedEventArgs(this)
{
P2PVersion = hello.P2PVersion,
ClientId = hello.ClientId,
Capabilities = hello.Capabilities
};
ProtocolInitialized?.Invoke(this, eventArgs);
}
private void HandleHello(HelloMessage hello)
{
ReportIn(hello);
bool isInbound = !_sentHello;
if (Logger.IsTrace)
{
Logger.Trace($"{Session} P2P received hello.");
}
if (!hello.NodeId.Equals(Session.RemoteNodeId))
{
if (Logger.IsDebug)
{
Logger.Debug($"Inconsistent Node ID details - expected {Session.RemoteNodeId}, " +
$"received hello with {hello.NodeId} " +
$"on {(isInbound ? "IN connection" : "OUT connection")}");
}
// it does not really matter if there is mismatch - we do not use it anywhere
// throw new NodeDetailsMismatchException();
}
RemoteClientId = hello.ClientId;
Session.Node.ClientId = hello.ClientId;
if (Logger.IsTrace)
{
Logger.Trace(!_sentHello
? $"{Session.RemoteNodeId} P2P initiating inbound {hello.Protocol}.{hello.P2PVersion} " +
$"on {hello.ListenPort} ({hello.ClientId})"
: $"{Session.RemoteNodeId} P2P initiating outbound {hello.Protocol}.{hello.P2PVersion} " +
$"on {hello.ListenPort} ({hello.ClientId})");
}
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-8.md
// Clients implementing a newer version simply send a packet with higher version and possibly additional list elements.
// * If such a packet is received by a node with lower version,
// it will blindly assume that the remote end is backwards-compatible and respond with the old handshake.
// * If the packet is received by a node with equal version,
// new features of the protocol can be used.
// * If the packet is received by a node with higher version,
// it can enable backwards-compatibility logic or drop the connection.
ProtocolVersion = hello.P2PVersion;
List <Capability> capabilities = hello.Capabilities;
AvailableCapabilities = new List <Capability>(capabilities);
foreach (Capability theirCapability in capabilities)
{
if (SupportedCapabilities.Contains(theirCapability))
{
if (Logger.IsTrace)
{
Logger.Trace($"{Session.RemoteNodeId} Agreed on {theirCapability.ProtocolCode} v{theirCapability.Version}");
}
AgreedCapabilities.Add(theirCapability);
}
else
{
if (Logger.IsTrace)
{
Logger.Trace($"{Session.RemoteNodeId} Capability not supported " +
$"{theirCapability.ProtocolCode} v{theirCapability.Version}");
}
}
}
if (!capabilities.Any(c => SupportedCapabilities.Contains(c)))
{
Session.InitiateDisconnect(
DisconnectReason.UselessPeer,
$"capabilities: {string.Join(", ", capabilities)}");
}
ReceivedProtocolInitMsg(hello);
P2PProtocolInitializedEventArgs eventArgs = new P2PProtocolInitializedEventArgs(this)
{
P2PVersion = ProtocolVersion,
ClientId = RemoteClientId,
Capabilities = capabilities,
ListenPort = hello.ListenPort
};
ProtocolInitialized?.Invoke(this, eventArgs);
}
public void HandleHello(HelloMessage hello)
{
bool isInbound = !_sentHello;
if (Logger.IsTrace)
{
Logger.Trace($"{P2PSession.RemoteNodeId} P2P received hello.");
}
if (!hello.NodeId.Equals(P2PSession.RemoteNodeId))
{
if (Logger.IsDebug)
{
Logger.Debug($"Inconsistent Node ID details - expected {P2PSession.RemoteNodeId}, received hello with {hello.NodeId} on " + (isInbound ? "IN connection" : "OUT connection"));
}
// it does not really matter if there is mismatch - we do not use it anywhere
// throw new NodeDetailsMismatchException();
}
RemoteClientId = hello.ClientId;
Logger.Trace(!_sentHello
? $"{P2PSession.RemoteNodeId} P2P initiating inbound {hello.Protocol} v{hello.P2PVersion} on {hello.ListenPort} ({hello.ClientId})"
: $"{P2PSession.RemoteNodeId} P2P initiating outbound {hello.Protocol} v{hello.P2PVersion} on {hello.ListenPort} ({hello.ClientId})");
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-8.md
// Clients implementing a newer version simply send a packet with higher version and possibly additional list elements.
// * If such a packet is received by a node with lower version, it will blindly assume that the remote end is backwards-compatible and respond with the old handshake.
// * If the packet is received by a node with equal version, new features of the protocol can be used.
// * If the packet is received by a node with higher version, it can enable backwards-compatibility logic or drop the connection.
ProtocolVersion = hello.P2PVersion;
var capabilities = hello.Capabilities;
foreach (Capability remotePeerCapability in capabilities)
{
if (SupportedCapabilities.Contains(remotePeerCapability))
{
if (Logger.IsTrace)
{
Logger.Trace($"{P2PSession.RemoteNodeId} Agreed on {remotePeerCapability.ProtocolCode} v{remotePeerCapability.Version}");
}
AgreedCapabilities.Add(remotePeerCapability);
}
else
{
if (Logger.IsTrace)
{
Logger.Trace($"{P2PSession.RemoteNodeId} Capability not supported {remotePeerCapability.ProtocolCode} v{remotePeerCapability.Version}");
}
}
}
_isInitialized = true;
if (!capabilities.Any(x => x.ProtocolCode == Protocol.Eth && (x.Version == 62 || x.Version == 63)))
{
Disconnect(DisconnectReason.UselessPeer);
}
ReceivedProtocolInitMsg(hello);
var eventArgs = new P2PProtocolInitializedEventArgs(this)
{
P2PVersion = ProtocolVersion,
ClientId = RemoteClientId,
Capabilities = capabilities,
ListenPort = hello.ListenPort
};
ProtocolInitialized?.Invoke(this, eventArgs);
}