/**
* Build a BindingPrefix given an IaAddress loaded from the database
* and a static binding for the client request.
*
* @param iaPrefix
* @param staticBinding
* @return
*/
private V6BindingPrefix BuildV6BindingPrefixFromIaPrefix(IaPrefix iaPrefix,
StaticBinding staticBinding)
{
V6BindingPrefix bindingPrefix = new V6BindingPrefix(iaPrefix, staticBinding);
return(bindingPrefix);
}
/**
* Build a V6BindingAddress given an IaAddress loaded from the database
* and a static binding for the client request.
*
* @param iaAddr
* @param staticBinding
* @return
*/
private V6BindingAddress BuildV6StaticBindingFromIaAddr(IaAddress iaAddr,
StaticBinding staticBinding)
{
V6BindingAddress bindingAddr = new V6BindingAddress(iaAddr, staticBinding);
return(bindingAddr);
}
/// <summary>
/// Update an existing static binding.
/// </summary>
/// <param name="binding">existing client binding</param>
/// <param name="clientLink">link for the client request message</param>
/// <param name="duid">DUID of the client</param>
/// <param name="iatype">IA type of the client request</param>
/// <param name="iaid">IAID of the client request</param>
/// <param name="staticBinding">static binding</param>
/// <param name="requestMsg">client request message</param>
/// <returns>updated Binding</returns>
protected Binding UpdateStaticBinding(Binding binding, DhcpLink clientLink,
byte[] duid, byte iatype, long iaid, StaticBinding staticBinding,
DhcpMessage requestMsg)
{
List <IaAddress> addIaAddresses = null;
List <IaAddress> updateIaAddresses = null;
List <IaAddress> delIaAddresses = null; // not used currently
if (staticBinding != null)
{
_log.Info("Updating static binding: " + binding);
HashSet <BindingObject> bindingObjs = binding.GetBindingObjects();
if ((bindingObjs != null) && bindingObjs.Count > 0)
{
foreach (BindingObject bindingObj in bindingObjs)
{
if (bindingObj.GetIpAddress().Equals(staticBinding.GetIpAddress()))
{
SetBindingObjectTimes(bindingObj,
staticBinding.GetPreferredLifetimeMs(),
staticBinding.GetPreferredLifetimeMs());
break;
}
//TODO: what about bindingObjs that do NOT match the static binding?
}
// the existing IaAddress binding objects will be updated
updateIaAddresses = binding.GetIaAddresses();
}
else
{
IPAddress inetAddr = staticBinding.GetInetAddress();
if (inetAddr != null)
{
BindingObject bindingObj = BuildStaticBindingObject(inetAddr, staticBinding);
bindingObjs = new HashSet <BindingObject>();
bindingObjs.Add(bindingObj);
binding.SetBindingObjects(bindingObjs);
// this new IaAddress binding object will be added
addIaAddresses = binding.GetIaAddresses();
}
}
}
else
{
_log.Error("StaticBindingObject is null");
}
binding.SetState(IaAddress.STATIC);
try
{
iaMgr.UpdateIA(binding, addIaAddresses, updateIaAddresses, delIaAddresses);
return(binding); // if we get here, it worked
}
catch (Exception ex)
{
_log.Error("Failed to update binding");
return(null);
}
}
/// <summary>
/// Create a binding in from a StaticBinding
/// </summary>
/// <param name="clientLink">link for the client request message</param>
/// <param name="duid">DUID of the client</param>
/// <param name="iatype">IA type of the client request</param>
/// <param name="iaid">IAID of the client request</param>
/// <param name="staticBinding">static binding</param>
/// <param name="requestMsg">client request message</param>
/// <returns>created Binding</returns>
protected Binding CreateStaticBinding(DhcpLink clientLink, byte[] duid, byte iatype, long iaid,
StaticBinding staticBinding, DhcpMessage requestMsg)
{
Binding binding = null;
if (staticBinding != null)
{
binding = BuildBinding(clientLink, duid, iatype, iaid, IaAddress.STATIC);
IPAddress inetAddr = staticBinding.GetInetAddress();
if (inetAddr != null)
{
IaAddress iaAddr = new IaAddress();
iaAddr.SetIpAddress(inetAddr);
iaAddr.SetState(IaAddress.STATIC);
V6BindingAddress bindingAddr = new V6BindingAddress(iaAddr, staticBinding);
SetBindingObjectTimes(bindingAddr,
staticBinding.GetPreferredLifetimeMs(),
staticBinding.GetPreferredLifetimeMs());
// TODO store the configured options in the persisted binding?
// bindingAddr.setDhcpOptions(bp.getDhcpOptions());
HashSet <BindingObject> bindingObjs = new HashSet <BindingObject>();
bindingObjs.Add(bindingAddr);
binding.SetBindingObjects(bindingObjs);
try
{
iaMgr.CreateIA(binding);
}
catch (Exception ex)
{
_log.Error("Failed to create persistent binding");
return(null);
}
}
else
{
_log.Error("Failed to build binding object(s)");
return(null);
}
}
else
{
_log.Error("StaticBinding object is null");
}
String bindingType = (iatype == IdentityAssoc.V4_TYPE) ? "discover" : "solicit";
if (binding != null)
{
_log.Info("Created static " + bindingType + " binding: " + binding.ToString());
}
else
{
_log.Warn("Failed to create static " + bindingType + " binding");
}
return(binding);
}
public Binding CreateSolicitBinding(DhcpLink clientLink, DhcpV6ClientIdOption clientIdOption, DhcpV6IaNaOption iaNaOption, DhcpMessage requestMsg, byte state, IPAddress clientV4IPAddress)
{
byte[] duid = clientIdOption.GetDuid();
long iaid = iaNaOption.GetIaId();
StaticBinding staticBinding = FindStaticBinding(clientLink.GetLink(), duid, IdentityAssoc.NA_TYPE, iaid, requestMsg);
if (staticBinding != null)
{
return(base.CreateStaticBinding(clientLink, duid, IdentityAssoc.NA_TYPE, iaid, staticBinding, requestMsg));
}
else
{
return(base.CreateBinding(clientLink, duid, IdentityAssoc.NA_TYPE,
iaid, GetInetAddrs(iaNaOption), requestMsg, state, clientV4IPAddress));
}
}
public Binding UpdateBinding(Binding binding, DhcpLink clientLink,
byte[] macAddr, DhcpMessage requestMsg, byte state)
{
StaticBinding staticBinding =
FindStaticBinding(clientLink.GetLink(), macAddr, IdentityAssoc.V4_TYPE, 0, requestMsg);
if (staticBinding != null)
{
return(base.UpdateStaticBinding(binding, clientLink, macAddr, IdentityAssoc.V4_TYPE,
0, staticBinding, requestMsg));
}
else
{
return(base.UpdateBinding(binding, clientLink, macAddr, IdentityAssoc.V4_TYPE,
0, GetInetAddrs(requestMsg), requestMsg, state, null));
}
}
/**
* Create a Binding given an IdentityAssoc loaded from the database.
*
* @param ia the ia
* @param clientLink the client link
* @param requestMsg the request msg
*
* @return the binding
*/
protected override Binding BuildBindingFromIa(IdentityAssoc ia, DhcpLink clientLink,
DhcpMessage requestMsg)
{
Binding binding = new Binding(ia, clientLink);
List <IaAddress> iaAddrs = ia.GetIaAddresses();
if ((iaAddrs != null) && iaAddrs.Count > 0)
{
List <IaAddress> bindingAddrs = new List <IaAddress>();
foreach (IaAddress iaAddr in iaAddrs)
{
if (!clientLink.GetSubnet().Contains(iaAddr.GetIpAddress()))
{
log.Info("Ignoring off-link binding address: " +
iaAddr.GetIpAddress().ToString());
continue;
}
V4BindingAddress bindingAddr = null;
StaticBinding staticBinding =
FindStaticBinding(clientLink.GetLink(), ia.GetDuid(),
ia.GetIatype(), ia.GetIaid(), requestMsg);
if (staticBinding != null)
{
bindingAddr =
BuildV4StaticBindingFromIaAddr(iaAddr, staticBinding);
}
else
{
bindingAddr =
BuildV4BindingAddressFromIaAddr(iaAddr, clientLink.GetLink(), requestMsg);
}
if (bindingAddr != null)
{
bindingAddrs.Add(bindingAddr);
}
}
// replace the collection of IaAddresses with BindingAddresses
binding.SetIaAddresses(bindingAddrs);
}
else
{
log.Warn("IA has no addresses, binding is empty.");
}
return(binding);
}
/**
* Create a Binding given an IdentityAssoc loaded from the database.
*
* @param ia the ia
* @param clientLink the client link
* @param requestMsg the request msg
*
* @return the binding
*/
protected override Binding BuildBindingFromIa(IdentityAssoc ia,
DhcpLink clientLink, DhcpMessage requestMsg)
{
Binding binding = new Binding(ia, clientLink);
List <IaAddress> iaPrefs = ia.GetIaAddresses();
if ((iaPrefs != null) && iaPrefs.Count > 0)
{
List <IaAddress> bindingPrefixes = new List <IaAddress>();
foreach (IaAddress iaAddr in iaPrefs)
{
// off-link check needed only for v4?
// if (!clientLink.getSubnet().contains(iaAddr.getIpAddress())) {
// log.info("Ignoring off-link binding address: " +
// iaAddr.getIpAddress().getHostAddress());
// continue;
// }
V6BindingPrefix bindingPrefix = null;
StaticBinding staticBinding = FindStaticBinding(clientLink.GetLink(), ia.GetDuid(), ia.GetIatype(), ia.GetIaid(), requestMsg);
if (staticBinding != null)
{
bindingPrefix =
BuildV6BindingPrefixFromIaPrefix((IaPrefix)iaAddr, staticBinding);
}
else
{
bindingPrefix =
BuildBindingAddrFromIaPrefix((IaPrefix)iaAddr, clientLink.GetLink(), requestMsg);
}
if (bindingPrefix != null)
{
bindingPrefixes.Add(bindingPrefix);
}
}
// replace the collection of IaPrefixes with BindingPrefixes
binding.SetIaAddresses(bindingPrefixes);
}
else
{
log.Warn("IA has no prefixes, binding is empty.");
}
return(binding);
}
public Binding CreateDiscoverBinding(DhcpLink clientLink, byte[] macAddr,
DhcpMessage requestMsg, byte state)
{
lock (_lock)
{
StaticBinding staticBinding =
FindStaticBinding(clientLink.GetLink(), macAddr, IdentityAssoc.V4_TYPE, 0, requestMsg);
if (staticBinding != null)
{
return(base.CreateStaticBinding(clientLink, macAddr, IdentityAssoc.V4_TYPE,
0, staticBinding, requestMsg));
}
else
{
return(base.CreateBinding(clientLink, macAddr, IdentityAssoc.V4_TYPE,
0, GetInetAddrs(requestMsg), requestMsg, state, null));
}
}
}
/**
* Perform the DDNS delete processing when a lease is released or expired.
*
* @param ia the IdentityAssoc of the client
* @param iaAddr the released or expired IaAddress
*/
protected override void DdnsDelete(IdentityAssoc ia, IaAddress iaAddr)
{
DhcpV6ClientFqdnOption clientFqdnOption = null;
try
{
if ((ia != null) && (iaAddr != null))
{
List <DhcpOption> opts = iaAddr.GetDhcpOptions();
if (opts != null)
{
foreach (DhcpOption opt in opts)
{
if (opt.GetCode() == DhcpConstants.V6OPTION_CLIENT_FQDN)
{
clientFqdnOption = new DhcpV6ClientFqdnOption();
//clientFqdnOption.Decode(ByteBuffer.Wrap(opt.GetValue()));
break;
}
}
}
if (clientFqdnOption != null)
{
string fqdn = clientFqdnOption.GetDomainName();
if (!String.IsNullOrEmpty(fqdn))
{
DhcpLink link = serverConfig.FindLinkForAddress(iaAddr.GetIpAddress());
if (link != null)
{
V6BindingAddress bindingAddr = null;
StaticBinding staticBinding =
FindStaticBinding(link.GetLink(), ia.GetDuid(),
ia.GetIatype(), ia.GetIaid(), null);
if (staticBinding != null)
{
bindingAddr =
BuildV6StaticBindingFromIaAddr(iaAddr, staticBinding);
}
else
{
bindingAddr =
BuildV6BindingAddressFromIaAddr(iaAddr, link, null); // safe to send null requestMsg
}
if (bindingAddr != null)
{
DdnsCallback ddnsComplete =
new DhcpV6DdnsComplete(bindingAddr, clientFqdnOption);
DhcpConfigObject configObj = bindingAddr.GetConfigObj();
DdnsUpdater ddns =
new DdnsUpdater(link.GetLink(), configObj,
bindingAddr.GetIpAddress(), fqdn, ia.GetDuid(),
configObj.GetValidLifetime(),
clientFqdnOption.GetUpdateAaaaBit(), true,
ddnsComplete);
ddns.ProcessUpdates();
}
else
{
log.Error("Failed to find binding for address: " +
iaAddr.GetIpAddress().ToString());
}
}
else
{
log.Error("Failed to find link for binding address: " +
iaAddr.GetIpAddress().ToString());
}
}
else
{
log.Error("FQDN is null or empty. No DDNS deletes performed.");
}
}
else
{
log.Warn("No Client FQDN option in current binding. No DDNS deletes performed.");
}
}
}
catch (Exception ex)
{
log.Error("Failed to perform DDNS delete");
}
}
