public async Task <bool> ConnectAsync()
{
if (m_ip == null)
{
throw new InvalidOperationException("Can not connect to a server if no Ip address is specified");
}
if (IsConnected)
{
throw new InvalidOperationException("Le client est déjà connecté");
}
m_client = new TcpClientHandler(m_ip, m_port);
bool isSuccessful = await m_client.ConnectAsync();
if (isSuccessful)
{
m_isConnected = true;
m_client.Disconnected += m_client_Disconnected;
m_client.ReceivedFull += m_client_ReceivedFull;
return(true);
}
m_isConnected = false;
m_client = null;
return(false);
}
public bool FindServer(int port)
{
foreach (NetworkInterface netwIntrf in NetworkInterface.GetAllNetworkInterfaces())
{
//if the current interface doesn't have an IP, skip it
if (!(netwIntrf.GetIPProperties().GatewayAddresses.Count > 0))
{
continue;
}
//get current IP Address(es)
foreach (UnicastIPAddressInformation uniIpInfo in netwIntrf.GetIPProperties().UnicastAddresses)
{
if (uniIpInfo.Address.IsIPv6LinkLocal || uniIpInfo.IPv4Mask == IPAddress.Any)
{
continue;
}
//get the subnet mask and the IP address as bytes
byte[] subnetMask = uniIpInfo.IPv4Mask.GetAddressBytes();
byte[] ipAddr = uniIpInfo.Address.GetAddressBytes();
// we reverse the byte-array if we are dealing with littl endian.
if (BitConverter.IsLittleEndian)
{
Array.Reverse(subnetMask);
Array.Reverse(ipAddr);
}
uint maskAsInt = BitConverter.ToUInt32(subnetMask, 0);
uint ipAsInt = BitConverter.ToUInt32(ipAddr, 0);
//we negate the subnet to determine the maximum number of host possible in this subnet
uint validHostsEndingMax = ~BitConverter.ToUInt32(subnetMask, 0);
uint validHostsStart = BitConverter.ToUInt32(ipAddr, 0) & BitConverter.ToUInt32(subnetMask, 0);
//we increment the startIp to the number of maximum valid hosts in this subnet and for each we check the intended port (refactoring needed)
for (uint i = 1; i <= validHostsEndingMax; i++)
{
uint host = validHostsStart + i;
byte[] hostBytes = BitConverter.GetBytes(host);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(hostBytes);
}
//this is the candidate IP address in "readable format"
String ipCandidate = Convert.ToString(hostBytes[0]) + "." + Convert.ToString(hostBytes[1]) + "." + Convert.ToString(hostBytes[2]) + "." + Convert.ToString(hostBytes[3]);
this.Ip = new IPAddress(hostBytes);
m_client = new TcpClientHandler(m_ip, m_port);
IAsyncResult result = m_client.ConnectAsync();
bool success = result.AsyncWaitHandle.WaitOne(20, true);
if (success && m_client.InfoHandler.Client.Connected)
{
m_client.Disconnected += m_client_Disconnected;
m_client.ReceivedFull += m_client_ReceivedFull;
m_isConnected = true;
return(true);
}
else
{
m_client.Disconnect();
m_client = null;
m_isConnected = false;
}
}
}
}
Console.WriteLine("No server found");
return(false);
}