/**
* Builds a binding pool from an PrefixPool using the given link and filter.
*
* @param pool the AddressPool to wrap as an PrefixBindingPool
* @param link the link
* @param linkFilter the link filter
*
* @return the binding pool
*
* @throws DhcpServerConfigException if there is a problem parsing the configured range
*/
protected V6PrefixBindingPool BuildV6BindingPool(v6PrefixPool pool, link link,
linkFilter linkFilter)
{
V6PrefixBindingPool bp = new V6PrefixBindingPool(pool);
long pLifetime =
DhcpServerPolicies.EffectivePolicyAsLong(bp, link, Property.PREFERRED_LIFETIME);
bp.SetPreferredLifetime(pLifetime);
long vLifetime =
DhcpServerPolicies.EffectivePolicyAsLong(bp, link, Property.VALID_LIFETIME);
bp.SetValidLifetime(vLifetime);
bp.SetLinkFilter(linkFilter);
List <IPAddress> usedIps = iaMgr.FindExistingIPs(bp.GetStartAddress(), bp.GetEndAddress());
if ((usedIps != null) && usedIps.Count > 0)
{
foreach (IPAddress ip in usedIps)
{
//TODO: for the quickest startup?...
// set IP as used without checking if the binding has expired
// let the reaper thread deal with all binding cleanup activity
bp.SetUsed(ip);
}
}
log.Info("Built prefix binding pool: " + bp.GetStartAddress().ToString() + "-" +
bp.GetEndAddress().ToString() + ", size=" + bp.GetSize());
return(bp);
}
/**
* Builds a binding pool from an V4AddressPool using the given link and filter.
*
* @param pool the V4AddressPool to wrap as an V4AddressBindingPool
* @param link the link
* @param linkFilter the link filter
*
* @return the binding pool
*
* @throws DhcpServerConfigException if there is a problem parsing the configured range
*/
protected V4AddressBindingPool BuildV4BindingPool(v4AddressPool pool, link link,
linkFilter linkFilter)
{
V4AddressBindingPool bp = new V4AddressBindingPool(pool);
long leasetime =
DhcpServerPolicies.EffectivePolicyAsLong(bp, link, Property.V4_DEFAULT_LEASETIME);
bp.SetLeasetime(leasetime);
bp.SetLinkFilter(linkFilter);
List <IPAddress> usedIps = iaMgr.FindExistingIPs(bp.GetStartAddress(), bp.GetEndAddress());
if ((usedIps != null) && usedIps.Count > 0)
{
foreach (IPAddress ip in usedIps)
{
//TODO: for the quickest startup?...
// set IP as used without checking if the binding has expired
// let the reaper thread deal with all binding cleanup activity
bp.SetUsed(ip);
}
}
log.Info("Built v4 address binding pool: " + bp.GetStartAddress().ToString() + "-" +
bp.GetEndAddress().ToString() + " size=" + bp.GetSize());
return(bp);
}
protected override List <v6AddressPool> GetV6AddressPools(linkFilter linkFilter)
{
return(linkFilter.v6NaAddrPools);
}
/**
* Sets the link filter.
*
* @param linkFilter the new link filter
*/
public void SetLinkFilter(linkFilter linkFilter)
{
this.linkFilter = linkFilter;
}
/** * Fetch the V6AddressPoolsType XML object from the given LinkFilter XML object. * The subclasses fetch the address pools for either NA or TA addresses. * * @param linkFilter the link filter * @return the V6AddressPoolsType for this link filter, or null if none */ protected abstract List <v6AddressPool> GetV6AddressPools(linkFilter linkFilter);
/**
* Builds a binding pool from an AddressPool using the given link.
*
* @param pool the AddressPool to wrap as an AddressBindingPool
* @param link the link
*
* @return the binding pool
*
* @throws DhcpServerConfigException if there is a problem parsing the configured range
*/
private V6AddressBindingPool BuildV6BindingPool(v6AddressPool pool, link link, linkFilter linkFilter)
{
Debug.Assert(CheckIPIsUsed != null, "V6AddrBindingManager --BuildV6BindingPool-- CheckIPIsUsed = null");
V6AddressBindingPool bp = new V6AddressBindingPool(pool);
long pLifetime = long.Parse(Property.PREFERRED_LIFETIME.Value());
// DhcpServerPolicies.EffectivePolicyAsLong(bp, link, Property.PREFERRED_LIFETIME);
bp.SetPreferredLifetime(pLifetime);
long vLifetime = long.Parse(Property.VALID_LIFETIME.Value());
// DhcpServerPolicies.EffectivePolicyAsLong(bp, link, Property.VALID_LIFETIME);
bp.SetValidLifetime(vLifetime);
bp.SetLinkFilter(linkFilter);
bp.CheckIPIsUsed = CheckIPIsUsed;
List <IPAddress> usedIps = null;// iaMgr.findExistingIPs(bp.getStartAddress(), bp.getEndAddress());
if ((usedIps != null) && usedIps.Count > 0)
{
foreach (IPAddress ip in usedIps)
{
//TODO: for the quickest startup?...
// set IP as used without checking if the binding has expired
// let the reaper thread deal with all binding cleanup activity
bp.SetUsed(ip);
}
}
log.Info("Built address binding pool: " + bp.GetStartAddress().ToString() + "-" +
bp.GetEndAddress().ToString());
return(bp);
}
/// <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);
}
