public void RequestChannelBind(STUNAddress stunAddress)
{
lock (_lock)
{
MessageSTUN message = CreateMessageSTUN(STUNMethod.ChannelBindRequest);
// channel number [0x4000 through 0x4FFF](uint)random.Next(0x4001, 0x4FFF);
uint channelNumber;
if (!ip2ChannelNumber.ContainsKey(stunAddress.ToString()))
{
GenerateChannelNumberForPeer(stunAddress);
}
channelNumber = ip2ChannelNumber[stunAddress.ToString()];
Console.WriteLine("RequestChannelBind: {0} {1}:{2}", channelNumber, stunAddress.ToString(), stunAddress.port);
channelNumber = (uint)(channelNumber << 16);
message.WriteString(STUNAttribute.Username, message.username);
message.WriteString(STUNAttribute.Realm, message.realm);
message.WriteUInt(STUNAttribute.ChannelNumber, channelNumber);
byte[] ret;
if (stunAddress.IsIPv4)
{
ret = new byte[8];
ret[1] = (byte)(0x01); // family
}
else
{
ret = new byte[16];
ret[1] = (byte)(0x02); // family
}
ret[0] = (byte)(0x0);
ret[3] = (byte)(stunAddress.port & 0xff);
ret[2] = (byte)((stunAddress.port >> 8) & 0xff);
ret[2] ^= transactionID[0];
ret[3] ^= transactionID[1];
for (int i = 0; i < stunAddress.address.Length; i++)
{
ret[4 + i] = (byte)(stunAddress.address[i] ^ transactionID[i]);
}
message.WriteBytes(STUNAttribute.XorPeerAddress, ret);
if (nonce != null)
{
message.WriteBytes(STUNAttribute.Nonce, nonce);
message.WriteRequestIntegrity();
}
byte[] pkg = message.WriteRequest();
sender.Send(pkg);
}
}
public byte[] Translate(STUNAddress peer, string text)
{
byte[] utfBytes = Encoding.UTF8.GetBytes(text);
string ipaddress = peer.ToString();
return(Translate(ipaddress, utfBytes));
}
private uint GenerateChannelNumberForPeer(STUNAddress peer)
{
string key = peer.ToString();
lock (_lock)
{
if (ip2ChannelNumber.ContainsKey(key))
{
return(ip2ChannelNumber[key]);
}
// channel number [0x4000 through 0x4FFF]
while (channelNumber2Peer.ContainsKey(channelNumberAvailalbe))
{
AddChannelNumberAvailalbe();
}
channelNumber2Peer[channelNumberAvailalbe] = peer;
uint channelnumber = channelNumberAvailalbe;
ip2ChannelNumber[key] = channelNumberAvailalbe;
AddChannelNumberAvailalbe();
return(channelnumber);
}
}
private bool AddPeer(STUNAddress addr)
{
lock (_lock)
{
if (ip2ChannelNumber.ContainsKey(addr.ToString()))
{
return(false);
}
}
peers.Add(addr);
var id = GenerateChannelNumberForPeer(addr);
lock (_lockHeartbeat)
{
peerHeartbeat[id] = -2;// (int)((double)lifeTime / (double)STUNClient.HeartbeatAfterConnected + 0.5);
}
if (peersInTrashCan.ContainsKey(id))
{
peersInTrashCan.Remove(id);
}
return(true);
}
public byte[] Translate(STUNAddress ipaddress, byte[] data)
{
return(Translate(ipaddress.ToString(), data));
}
