public PeerSearchReply DoPeerSearch(string[] serverAddresses, int serverPort, string name)
{
if (!ConnectToAnyServer(serverAddresses, serverPort))
{
return(null);
}
PeerSearchReply reply = SendPeerSearch(name);
Disconnect();
return(reply);
}
/// <summary>
/// Query for search string
/// </summary>
/// <param name="name"></param>
/// <returns>search reply with list of peers</returns>
private PeerSearchReply SendPeerSearch(string name)
{
Logging.Instance.Log(LogTypes.Debug, TAG, nameof(SendPeerSearch), $"name='{name}'");
PeerSearchReply reply = new PeerSearchReply();
if (client == null)
{
Logging.Instance.Error(TAG, nameof(SendPeerSearch), "no server connection");
reply.Error = "no server connection";
return(reply);
}
if (string.IsNullOrEmpty(name))
{
reply.Error = "no search name";
return(reply);
}
byte[] sendData = new byte[43];
sendData[0] = 0x0A; // Peer_search
sendData[1] = 0x29; // length
sendData[2] = 0x01;; // version 1
byte[] txt = Encoding.ASCII.GetBytes(name);
Buffer.BlockCopy(txt, 0, sendData, 3, txt.Length);
try
{
stream.Write(sendData, 0, sendData.Length);
}
catch (Exception ex)
{
Message?.Invoke(LngText(LngKeys.Message_SubscribeServerError));
Logging.Instance.Error(TAG, nameof(SendPeerQuery), $"error sending data to subscribe server", ex);
reply.Valid = false;
reply.Error = "reply server error";
return(reply);
}
byte[] ack = new byte[] { 0x08, 0x00 };
List <PeerQueryData> list = new List <PeerQueryData>();
while (true)
{
byte[] recvData = new byte[102];
int recvLen = 0;
try
{
recvLen = stream.Read(recvData, 0, recvData.Length);
}
catch (Exception ex)
{
Logging.Instance.Error(TAG, nameof(SendPeerQuery), $"error receiving data from subscribe server", ex);
reply.Valid = false;
reply.Error = "reply server error";
return(reply);
}
//Logging.Instance.Log(LogTypes.Debug, TAG, nameof(SendPeerSearch), $"recvLen={recvLen}");
if (recvLen == 0)
{
Logging.Instance.Log(LogTypes.Error, TAG, nameof(SendPeerSearch), $"recvLen=0");
reply.Error = $"no data received";
return(reply);
}
if (recvData[0] == 0x09)
{
// end of list
break;
}
if (recvLen < 2 + 0x64)
{
Logging.Instance.Log(LogTypes.Warn, TAG, nameof(SendPeerSearch), $"received data to short ({recvLen} bytes)");
reply.Error = $"received data to short ({recvLen} bytes)";
continue;
}
if (recvData[1] != 0x64)
{
Logging.Instance.Log(LogTypes.Warn, TAG, nameof(SendPeerSearch), $"invalid length value ({recvData[1]})");
reply.Error = $"invalid length value ({recvData[1]})";
continue;
}
PeerQueryData data = ByteArrayToPeerData(recvData, 2);
Logging.Instance.Log(LogTypes.Debug, TAG, nameof(SendPeerSearch), $"found {data}");
list.Add(data);
// send ack
try
{
stream.Write(ack, 0, ack.Length);
}
catch (Exception ex)
{
Logging.Instance.Error(TAG, nameof(SendPeerQuery), $"error sending data to subscribe server", ex);
return(null);
}
}
list.Sort(new PeerQueryDataSorter(PeerQueryDataSorter.Sort.Number));
reply.List = list.ToArray();
reply.Valid = true;
reply.Error = "ok";
return(reply);
}
