private void BuildDHCPACK(PhysicalAddress chaddr, DhcpOption55 dhcpoption55, DhcpLeases dhcplease)
{
DhcpLeaseItem item = dhcplease.GetItem(chaddr);
// 必須
this.dhcpoptions_.Add(new DhcpOption53(DhcpPacket.MessageType.DHCPACK));
this.dhcpoptions_.Add(new DhcpOption(54, item.server_identifier_));
this.dhcpoptions_.Add(new DhcpOption(51, item.lease_time_));
// 任意
if (dhcpoption55.parameter_request_list_ != null)
{
foreach (byte b in dhcpoption55.parameter_request_list_)
{
switch (b)
{
case 1: this.dhcpoptions_.Add(new DhcpOption(1, item.subnet_mask_)); break;
case 3: this.dhcpoptions_.Add(new DhcpOption(3, item.router_)); break;
case 6: this.dhcpoptions_.Add(new DhcpOption(6, item.domain_name_server_)); break;
case 58: this.dhcpoptions_.Add(new DhcpOption(58, item.renewal_time_)); break;
case 59: this.dhcpoptions_.Add(new DhcpOption(59, item.rebinding_time_)); break;
default: break;
}
}
}
// 必須（最後必ず）
this.dhcpoptions_.Add(new DhcpOption(255));
}
// MACアドレスに対応するレコードがあって自動応答か？
public bool AutoReply(PhysicalAddress chaddr)
{
DhcpLeaseItem searchitem = SearchItem(chaddr);
// 見つかれば、自動応答かを返却
if (searchitem != null)
{
return(searchitem.autoreply_);
}
// 見つからないときは「自動応答ではない」とする
return(false);
}
// MACアドレスから取得対象のレコードを返却。なければ新規に作成して返却。
public DhcpLeaseItem GetItem(PhysicalAddress chaddr)
{
DhcpLeaseItem searchitem = SearchItem(chaddr);
// 見つかれば返却
if (searchitem != null)
{
return(searchitem);
}
// なければ新規に作成
DhcpLeaseItem newitem = new DhcpLeaseItem(chaddr);
this.items_.Add(newitem);
return(newitem);
}
private void BuildDHCPACK(DhcpPacket basePacket, DhcpLeases dhcplease)
{
DhcpLeaseItem item = dhcplease.GetItem(basePacket.chaddr_);
this.op_ = OP.BOOTREPLY;
this.htype_ = basePacket.htype_;
this.hlen_ = basePacket.hlen_;
this.xid_ = basePacket.xid_;
this.ciaddr_ = basePacket.ciaddr_;
this.yiaddr_ = item.yiaddr_;
this.siaddr_ = new IPAddress(0); // 仮
this.giaddr_ = basePacket.giaddr_;
this.chaddr_ = basePacket.chaddr_;
this.options_ = new DhcpOptions(
DhcpPacket.MessageType.DHCPACK,
basePacket.chaddr_,
basePacket.dhcpoption55_,
dhcplease
);
}
// MACアドレスに対応するレコードがあるか？
public bool Matches(PhysicalAddress chaddr)
{
DhcpLeaseItem searchitem = SearchItem(chaddr);
return(searchitem != null);
}
