// Returns a random new potential neighbor. Returns null if no new neighbor is found.
public static Peer scanForNeighbor()
{
Peer connectToPeer = null;
// Find only masternodes
while (connectToPeer == null)
{
bool addr_valid = true;
Peer p = PeerStorage.getRandomMasterNodeAddress();
if (p == null)
{
break;
}
// Next, check if we're connecting to a self address of this node
string[] server = p.hostname.Split(':');
if (server.Length < 2)
{
break;
}
// Resolve the hostname first
string resolved_server_name = NetworkUtils.resolveHostname(server[0]);
string resolved_server_name_with_port = resolved_server_name + ":" + server[1];
// Check if we are already connected to this address
lock (networkClients)
{
foreach (NetworkClient client in networkClients)
{
if (client.getFullAddress(true).Equals(resolved_server_name_with_port, StringComparison.Ordinal))
{
// Address is already in the client list
addr_valid = false;
break;
}
}
}
// Check if node is already in the server list
string[] connectedClients = NetworkServer.getConnectedClients(true);
for (int i = 0; i < connectedClients.Length; i++)
{
if (connectedClients[i].Equals(resolved_server_name_with_port, StringComparison.Ordinal))
{
// Address is already in the client list
addr_valid = false;
break;
}
}
if (addr_valid == false)
{
continue;
}
// Check against connecting clients list as well
lock (connectingClients)
{
foreach (string client in connectingClients)
{
if (resolved_server_name_with_port.Equals(client, StringComparison.Ordinal))
{
// Address is already in the connecting client list
addr_valid = false;
break;
}
}
}
if (addr_valid == false)
{
continue;
}
if (NetworkServer.isRunning())
{
// Get all self addresses and run through them
List <string> self_addresses = CoreNetworkUtils.GetAllLocalIPAddresses();
foreach (string self_address in self_addresses)
{
// Don't connect to self
if (resolved_server_name.Equals(self_address, StringComparison.Ordinal))
{
if (server[1].Equals(string.Format("{0}", IxianHandler.publicPort), StringComparison.Ordinal))
{
addr_valid = false;
}
}
}
}
// If the address is valid, add it to the candidates
if (addr_valid)
{
connectToPeer = p;
}
}
return(connectToPeer);
}
// Connects to a specified node, with the syntax host:port
public static bool connectTo(string host, byte[] wallet_address)
{
if (host == null || host.Length < 3)
{
Logging.error(String.Format("Invalid host address {0}", host));
return(false);
}
string[] server = host.Split(':');
if (server.Count() < 2)
{
Logging.warn(string.Format("Cannot connect to invalid hostname: {0}", host));
return(false);
}
// Resolve the hostname first
string resolved_server_name = NetworkUtils.resolveHostname(server[0]);
// Skip hostnames we can't resolve
if (resolved_server_name.Length < 1)
{
Logging.warn(string.Format("Cannot resolve IP for {0}, skipping connection.", server[0]));
return(false);
}
string resolved_host = string.Format("{0}:{1}", resolved_server_name, server[1]);
if (NetworkServer.isRunning())
{
// Verify against the publicly disclosed ip
// Don't connect to self
if (resolved_server_name.Equals(IxianHandler.publicIP, StringComparison.Ordinal))
{
if (server[1].Equals(string.Format("{0}", IxianHandler.publicPort), StringComparison.Ordinal))
{
Logging.info(string.Format("Skipping connection to public self seed node {0}", host));
return(false);
}
}
// Get all self addresses and run through them
List <string> self_addresses = CoreNetworkUtils.GetAllLocalIPAddresses();
foreach (string self_address in self_addresses)
{
// Don't connect to self
if (resolved_server_name.Equals(self_address, StringComparison.Ordinal))
{
if (server[1].Equals(string.Format("{0}", IxianHandler.publicPort), StringComparison.Ordinal))
{
Logging.info(string.Format("Skipping connection to self seed node {0}", host));
return(false);
}
}
}
}
lock (connectingClients)
{
foreach (string client in connectingClients)
{
if (resolved_host.Equals(client, StringComparison.Ordinal))
{
// We're already connecting to this client
return(false);
}
}
// The the client to the connecting clients list
connectingClients.Add(resolved_host);
}
// Check if node is already in the client list
lock (networkClients)
{
foreach (NetworkClient client in networkClients)
{
if (client.getFullAddress(true).Equals(resolved_host, StringComparison.Ordinal))
{
// Address is already in the client list
return(false);
}
}
}
// Check if node is already in the server list
string[] connectedClients = NetworkServer.getConnectedClients(true);
for (int i = 0; i < connectedClients.Length; i++)
{
if (connectedClients[i].Equals(resolved_host, StringComparison.Ordinal))
{
// Address is already in the client list
return(false);
}
}
// Connect to the specified node
NetworkClient new_client = new NetworkClient();
// Recompose the connection address from the resolved IP and the original port
bool result = new_client.connectToServer(resolved_server_name, Convert.ToInt32(server[1]), wallet_address);
// Add this node to the client list if connection was successfull
if (result == true)
{
// Add this node to the client list
lock (networkClients)
{
networkClients.Add(new_client);
}
}
// Remove this node from the connecting clients list
lock (connectingClients)
{
connectingClients.Remove(resolved_host);
}
return(result);
}