protected bool AllIaAddrsOnLink(DhcpV6IaTaOption dhcpIaTaOption, DhcpLink clientLink)
{
bool onLink = true;
// assume all IPs are on link
if ((dhcpIaTaOption != null))
{
List <DhcpV6IaAddrOption> iaAddrOpts = dhcpIaTaOption.GetIaAddrOptions();
if ((iaAddrOpts != null))
{
foreach (DhcpV6IaAddrOption iaAddrOpt in iaAddrOpts)
{
if (this.clientLink.GetSubnet().GetSubnetAddress().IsIPv6LinkLocal)
{
// if the Link address is link-local, then check if the
// address is within one of the pools configured for this
// local Link, which automatically makes this server
// "authoritative" (in ISC parlance) for this local net
v6AddressPool p = DhcpServerConfiguration.FindTaAddrPool(this.clientLink.GetLink(), iaAddrOpt.GetInetAddress());
if ((p == null))
{
log.Info(("No local address pool found for requested IA_TA: "
+ (iaAddrOpt.GetInetAddress().ToString() + " - considered to be off link")));
iaAddrOpt.SetPreferredLifetime(0);
iaAddrOpt.SetValidLifetime(0);
onLink = false;
}
}
else if (!this.clientLink.GetSubnet().Contains(iaAddrOpt.GetInetAddress()))
{
log.Info(("Setting zero(0) lifetimes for off link address: " + iaAddrOpt.GetInetAddress().ToString()));
iaAddrOpt.SetPreferredLifetime(0);
iaAddrOpt.SetValidLifetime(0);
onLink = false;
}
}
}
}
return(onLink);
}