protected void AddStaticBindings(DhcpLink dhcpLink, v4AddressBinding binding)
{
if (staticBindingMap.ContainsKey(dhcpLink.GetLinkAddress()))
{
V4StaticAddressBinding sb = new V4StaticAddressBinding(binding);
staticBindingMap[dhcpLink.GetLinkAddress()].Add(sb);
}
}
/// <summary>
/// Gets the next free address from the pool(s) configured for the client link.
/// </summary>
/// <param name="clientLink">client link</param>
/// <param name="requestMsg">request message</param>
/// <returns></returns>
protected IPAddress GetNextFreeAddress(DhcpLink clientLink, DhcpMessage requestMsg, IPAddress clientV4IPAddress)
{
if (clientLink != null)
{
List <BindingPool> pools = bindingPoolMap.ContainsKey(clientLink.GetLinkAddress()) ? bindingPoolMap[clientLink.GetLinkAddress()] : null;
if ((pools != null) && pools.Count > 0)
{
foreach (BindingPool bp in pools)
{
linkFilter filter = bp.GetLinkFilter();
if ((requestMsg != null) && (filter != null))
{
if (!DhcpServerConfiguration.MsgMatchesFilter(requestMsg, filter))
{
_log.Info("Client request does not match filter, skipping pool: " + bp.ToString());
continue;
}
}
_log.Debug("Getting next available address from pool: " + bp.ToString());
if (clientV4IPAddress != null)
{
//if (bp.GetV6AssignRule() != AssignDhcpV6Rule.Noen && bp.GetV6AssignRule() != AssignDhcpV6Rule.AssignV6IPAndDNSByV6Pool)
//{
// string[] clientV4IPArray = clientV4IPAddress.ToString().Split('.');
// IPAddress clientV6Addr = null;
// if (bp.GetV6AssignRule() == AssignDhcpV6Rule.AssignV6IPAndDNSByTransferV4IPLast2)
// {
// clientV6Addr = bp.GetNextAvailableAddress(clientV4IPArray[2], clientV4IPArray[3]);
// }
// else
// {
// clientV6Addr = bp.GetNextAvailableAddress("", clientV4IPArray[3]);
// }
// if (clientV6Addr != null)
// {
// return clientV6Addr;
// }
// // Callback sreach V4 IP Using MAC
// // 依照回傳的 IPv4 IP 決定回傳的 IPv6 IP
// // Return new IPAddress(clientLink.GetLinkAddress() + "IPv4 尾 1 碼或 2 碼")
// // byte[] v4TransferV6 = new byte[] { 32, 1, 176, 48, 17, 40, 1, 96, 0, 0, 0, 0, 0, 97, 1, 151 };
// // return new IPAddress(v4TransferV6);
// // 若無 v4 IP 則依照既有的邏輯進行派發，派發的 IP 從::255:255 以後開始派發
//}
}
IPAddress free = bp.GetNextAvailableAddress();
if (free != null)
{
_log.Debug("Found next available address: " + free.ToString());
return(free);
}
else
{
// warning here, b/c there may be more pools
_log.Warn("No free addresses available in pool: " + bp.ToString());
}
}
// if we get this far, then we did not find any free(virgin) addresses
// so we must start searching for any that can be used in the pools
foreach (BindingPool bp in pools)
{
linkFilter filter = bp.GetLinkFilter();
if ((requestMsg != null) && (filter != null))
{
if (!DhcpServerConfiguration.MsgMatchesFilter(requestMsg, filter))
{
_log.Info("Client request does not match filter, skipping pool: " + bp.ToString());
continue;
}
}
IPAddress reused = ReuseAvailableAddress(bp);
if (reused != null)
{
return(reused);
}
}
}
else
{
_log.Error("No Pools defined in server configuration for Link: " + clientLink.GetLinkAddress());
}
}
else
{
throw new Exception("ClientLink is null");
}
return(null);
}