public static bool ReceiveAllDirectoryPackets(byte[] first, DirMetadata meta, UdpClient target)
{
IPEndPoint remoteIPEndPoint = null;
if (first == null) { return false; }
Data data = new Data(first);
if (meta.dirLength < Constants.PAYLOAD_SIZE)
Console.WriteLine(Encoding.Default.GetString(data.payload,0,meta.dirLength));
else
Console.WriteLine(Encoding.Default.GetString(data.payload));
SendAckTo(data.id, target);
int currentPacket = 1;
while (currentPacket < meta.totalPackets) {
byte[] recBytes = target.Receive(ref remoteIPEndPoint);
if (!Utils.VerifyChecksum(recBytes)) {
continue;
}
data = new Data(recBytes);
if (data.id < currentPacket) {
SendAckTo(data.id, target);
}
else if (data.id == currentPacket && currentPacket != meta.totalPackets - 1) {
Console.WriteLine(Encoding.Default.GetString(data.payload));
SendAckTo(data.id, target);
currentPacket++;
}
else if (data.id == currentPacket && currentPacket == meta.totalPackets - 1) {
byte[] finalBytes = new byte[(meta.dirLength % Constants.PAYLOAD_SIZE)];
for (int i = 0; i < finalBytes.Length; i++) {
finalBytes[i] = data.payload[i + Constants.FIELD_PAYLOAD];
}
Console.WriteLine(Encoding.Default.GetString(finalBytes));
currentPacket++;
SendAckTo(data.id, target);
}
}
return true;
}
public static bool CatchMetadataResend(byte[] metadataAsBytes, UdpClient target)
{
byte[] receivedBytes = null;
IPEndPoint remoteIPEndPoint = null;
DirMetadata directoryMetadata = new DirMetadata(metadataAsBytes);
bool received = false;
while (!received) {
receivedBytes = target.Receive(ref remoteIPEndPoint);
if (Utils.VerifyChecksum(receivedBytes)) {
if (receivedBytes[Constants.FIELD_TYPE] == Constants.TYPE_DIRECTORY_DELIVERY) {
AckPacket ack = new AckPacket(-1);
Utils.SendTo(target, ack.MyPacketAsBytes);
return false;
}
received = true;
}
}
return ReceiveAllDirectoryPackets(receivedBytes, directoryMetadata, target);
}
