/// <summary>
/// 租期結束時間
/// </summary>
public DateTime GetValidEndTime()
{
long validLifetime = 0;
DhcpV6IaNaOption iaOption = (DhcpV6IaNaOption)GetIaNaOptions().FirstOrDefault();
if (iaOption != null && iaOption.GetIaAddrOptions() != null)
{
var iaAddress = iaOption.GetIaAddrOptions().FirstOrDefault();
validLifetime = iaAddress.GetValidLifetime();
}
return(DateTime.Now.AddSeconds(validLifetime));
}
/// <summary>
/// 取得派出的 IP
/// </summary>
/// <returns></returns>
public IPAddress GetIaAddress()
{
if (GetIaNaOptions() == null || GetIaNaOptions().Count == 0)
{
return(IPAddress.IPv6Any);
}
DhcpV6IaNaOption iaOption = (DhcpV6IaNaOption)GetIaNaOptions().FirstOrDefault();
if (iaOption.GetIaAddrOptions() == null || iaOption.GetIaAddrOptions().Count == 0)
{
return(IPAddress.IPv6Any);
}
var iaAddress = iaOption.GetIaAddrOptions().FirstOrDefault();
return(iaAddress.GetInetAddress());
}
/**
* Extract the list of IP addresses from within the given IA_NA option.
*
* @param iaNaOption the IA_NA option
*
* @return the list of InetAddresses for the IPs in the IA_NA option
*/
private List <IPAddress> GetInetAddrs(DhcpV6IaNaOption iaNaOption)
{
List <IPAddress> inetAddrs = null;
List <DhcpV6IaAddrOption> iaAddrs = iaNaOption.GetIaAddrOptions();
if ((iaAddrs != null) && iaAddrs.Count > 0)
{
inetAddrs = new List <IPAddress>();
foreach (DhcpV6IaAddrOption iaAddr in iaAddrs)
{
IPAddress inetAddr = iaAddr.GetInetAddress();
inetAddrs.Add(inetAddr);
}
}
return(inetAddrs);
}
protected bool AllIaAddrsOnLink(DhcpV6IaNaOption dhcpIaNaOption, DhcpLink clientLink)
{
bool onLink = true;
// assume all IPs are on link
if ((dhcpIaNaOption != null))
{
List <DhcpV6IaAddrOption> iaAddrOpts = dhcpIaNaOption.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.FindNaAddrPool(this.clientLink.GetLink(), iaAddrOpt.GetInetAddress());
if ((p == null))
{
log.Info(("No local address pool found for requested IA_NA: " + (iaAddrOpt.ToString() + " - considered to be off link")));
iaAddrOpt.SetPreferredLifetime(0);
iaAddrOpt.SetValidLifetime(0);
onLink = false;
}
}
else
{
// it the Link address is remote, then check
// if the address is valid for that link
if (!this.clientLink.GetSubnet().Contains(iaAddrOpt.GetInetAddress()))
{
log.Info("Setting zero(0) lifetimes for off link address: " + iaAddrOpt.GetIpAddress());
iaAddrOpt.SetPreferredLifetime(0);
iaAddrOpt.SetValidLifetime(0);
onLink = false;
}
}
}
}
}
return(onLink);
}
