/// <summary>
/// Creates new peer information.
/// </summary>
/// <param name="id">The peer ID.</param>
/// <param name="endPoint">The peer IP end-point.</param>
public PeerInfo(PeerID id, IPEndPoint endPoint)
{
if (id.ID == null)
{
throw new ArgumentException("The peer ID is invalid.", "id");
}
else if (endPoint == null)
{
throw new ArgumentNullException("endPoint");
}
this.id = id;
this.endPoint = endPoint;
}
private bool HandleHandshake(Packet packet)
{
if (packet.Length != 68)
{
Log.LogWarning("[Peer][{0}] Invalid handshake received with {1} bytes (should have been 68).", endPoint, packet.Length);
return(false);
}
int protocolNameLength = packet.ReadByte();
if (packet.RemainingBytes < (protocolNameLength + 40))
{
Log.LogWarning("[Peer][{0}] Invalid handshake received with {1} bytes (protocol name length: {2}).", endPoint, packet.Length, protocolNameLength);
return(false);
}
string protocolName = packet.ReadString(protocolNameLength);
if (!string.Equals(protocolName, ProtocolName))
{
Log.LogWarning("[Peer][{0}] Handshake protocol is not supported: {1}", endPoint, protocolName);
return(false);
}
// Skip 8 bytes of flags
packet.Skip(8);
byte[] hashBytes = packet.ReadBytes(20);
byte[] idBytes = packet.ReadBytes(20);
var infoHash = new InfoHash(hashBytes);
var peerID = new PeerID(idBytes);
if (torrent != null && !torrent.InfoHash.Equals(infoHash))
{
Log.LogWarning("[Peer][{0}] Handshake with invalid info hash: {1}", endPoint, infoHash);
return(false);
}
else if (torrent != null && peerID.Equals(torrent.PeerID))
{
peer.IsSelf = true;
Log.LogDebug("[Peer][{0}] Handshake with ourself. Closing connection.", endPoint);
return(false);
}
else if (torrent == null)
{
var foundTorrent = TorrentRegistry.FindTorrentByInfoHash(infoHash);
if (foundTorrent == null)
{
Log.LogWarning("[Peer][{0}] Handshake with unknown info hash: {1}", endPoint, infoHash);
return(false);
}
else if (foundTorrent.IsStoppedOrStopping)
{
Log.LogWarning("[Peer][{0}] Handshake received for a torrent that is stopped or currently stopping: {1}", endPoint, infoHash);
return(false);
}
torrent = foundTorrent;
if (peerID.Equals(torrent.PeerID))
{
Log.LogDebug("[Peer][{0}] Handshake with ourself. Closing connection.", endPoint);
return(false);
}
peer = torrent.OnPeerHandshaked(peerID, this);
}
if (peer.ID.IsNone)
{
// If the peer had no ID prior, then we set it now and register the ID with the torrent
peer.ID = peerID;
torrent.RegisterPeerWithID(peerID, peer);
}
else if (!peerID.Equals(peer.ID))
{
Log.LogWarning("[Peer][{0}] Handshake with invalid peer ID: {1} !== {2}", endPoint, peerID, peer.ID);
return(false);
}
this.infoHash = infoHash;
this.peerID = peerID;
isHandshakeReceived = true;
Log.LogDebug("[Peer][{0}] A peer handshaked with us with info hash [{1}] and peer ID [{2}].", endPoint, infoHash, peerID);
SendHandshake();
SendBitField();
OnHandshaked();
return(true);
}
