public static String GetNextFreeIP(String subnet, String minIp = "", String maxIp = "")
{
String ip = "0.0.0.0";
List <String> existingClients = findDhcpClients(AcademicDHCPServer, subnet).Select(client => client.ip).ToList();
if (!minIp.Equals("") && !existingClients.Contains(minIp))
{
return(minIp);
}
List <ipaddr> addresses = new List <ipaddr>();
foreach (String ipstr in existingClients)
{
addresses.Add(new ipaddr(ipstr));
}
addresses.Sort();
if (!minIp.Equals(""))
{
ipaddr min = new ipaddr(minIp);
List <ipaddr> cutList = new List <ipaddr>();
foreach (ipaddr addr in addresses)
{
if (addr.CompareTo(min) >= 0)
{
cutList.Add(addr);
}
}
addresses = cutList;
}
if (!maxIp.Equals(""))
{
ipaddr max = new ipaddr(maxIp);
List <ipaddr> cutList = new List <ipaddr>();
foreach (ipaddr addr in addresses)
{
if (addr.CompareTo(max) <= 0)
{
cutList.Add(addr);
}
}
addresses = cutList;
}
foreach (ipaddr addr in addresses)
{
if (!addresses.Contains(addr.next()))
{
return(addr.next().ip);
}
}
return(ip);
}
// Overrides the ConvertFrom method of TypeConverter.
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is string)
{
string address = (string)value;
ipaddr result = IPAddress.Parse(address);
return(result);
}
return(base.ConvertFrom(context, culture, value));
}
public void TestIPAddressV4()
{
ipaddr value = new ipaddr();
Assert.True(value.NotConfigured);
value = new IPAddress(new byte[] { 127, 0, 0, 1 });
Assert.False(value.NotConfigured);
Assert.Equal(new IPAddress(new byte[] { 127, 0, 0, 1 }), (IPAddress)value);
var registers = value.ToRegisters();
Assert.NotEmpty(registers);
Assert.Equal(2, registers.Length);
value = registers;
Assert.False(value.NotConfigured);
Assert.Equal(new IPAddress(new byte[] { 127, 0, 0, 1 }), (IPAddress)value);
string json = JsonConvert.SerializeObject(value);
var convert = JsonConvert.DeserializeObject <ipaddr>(json);
Assert.Equal((IPAddress)convert, (IPAddress)value);
string text = ((IPAddress)value).ToString();
convert = IPAddress.Parse(text);
Assert.Equal(convert, value);
}
public static List <String> GetRangeOfFreeIPs(String subnet, int count, String minIp = "", String maxIp = "")
{
List <String> ips = new List <string>();
List <String> existingClients = findDhcpClients(AcademicDHCPServer, subnet).Select(client => client.ip).ToList();
List <ipaddr> addresses = new List <ipaddr>();
ipaddr dotone = (new ipaddr(subnet)).next();
addresses.Add(dotone);
foreach (String ipstr in existingClients)
{
addresses.Add(new ipaddr(ipstr));
}
addresses.Sort();
if (!minIp.Equals(""))
{
ipaddr min = new ipaddr(minIp);
List <ipaddr> cutList = new List <ipaddr>();
foreach (ipaddr addr in addresses)
{
if (addr.CompareTo(min) >= 0)
{
cutList.Add(addr);
}
}
addresses = cutList;
}
if (!maxIp.Equals(""))
{
ipaddr max = new ipaddr(maxIp);
List <ipaddr> cutList = new List <ipaddr>();
foreach (ipaddr addr in addresses)
{
if (addr.CompareTo(max) <= 0)
{
cutList.Add(addr);
}
}
addresses = cutList;
}
foreach (ipaddr addr in addresses)
{
ipaddr next = addr.next();
while (!addresses.Contains(next) && count > 0)
{
ips.Add(next.ip);
count--;
next = next.next();
}
if (count <= 0)
{
break;
}
}
return(ips);
}
