/// <summary>把消息写入到数据流中</summary>
/// <param name="stream">数据流</param>
/// <param name="context">上下文</param>
public virtual Boolean Write(Stream stream, Object context)
{
stream.WriteByte(Version);
stream.Write(Token.GetBytes());
stream.Write((Byte)Command);
stream.Write(Mac.GetBytes());
Payload?.CopyTo(stream);
return(true);
}
//���M�p�P�b�g�p�̃R���X�g���N�^
public PacketDhcp(uint id, Ip requestIp, Ip serverIp, Mac mac, DhcpType dhcpType, int leaseTime, Ip maskIp, Ip gwIp, Ip dnsIp0, Ip dnsIp1, string wpadUrl)
{
//public PacketDhcp(uint id,Ip requestIp,Ip serverIp,Mac mac,DHCP_TYPE dhcpType) {
//Dmy init
_headerDhcp.HopCount = 0;
_headerDhcp.NumberOfSecounds = 0;
_headerDhcp.Flags = 0;
_headerDhcp.ClientIp = 0;
_headerDhcp.GatewayIp = 0;
_headerDhcp.ClientHwAddr = new byte[16];
_headerDhcp.ServerHostName = new String((char)0, 64);
_headerDhcp.BootFile = new String((char)0, 128);
_headerDhcp.Opcode = 0x02;// �����p�P�b�g
_headerDhcp.HwType = 0x01;
_headerDhcp.HwAddrLen = 0x06;
_headerDhcp.TransactionId = id;
_headerDhcp.MagicCookie = 0x63538263;
if (requestIp != null)
{
_headerDhcp.YourIp = Util.htonl(requestIp.AddrV4);
}
_headerDhcp.ServerIp = Util.htonl(serverIp.AddrV4);
Buffer.BlockCopy(mac.GetBytes(), 0, _headerDhcp.ClientHwAddr, 0, 6);
//�I�v�V����
_option = new byte[1];
_option[0] = 0xFF;//�I�[�|�C���^��Z�b�g
byte[] buf;//�I�v�V�����lj����̃e���|����
//if (dhcpType != DHCP_TYPE.INFRM) {
if (dhcpType == DhcpType.Ack || dhcpType == DhcpType.Offer)
{
// ERR if (dhcpType == DHCP_TYPE.OFFER) {
//leaseTime
double d = leaseTime / 0x2;
uint i = (uint)d;
buf = BitConverter.GetBytes(Util.htonl(i));
SetOptions(0x3a, buf);//Renewal Time
d = leaseTime * 0.85;
i = (uint)d;
buf = BitConverter.GetBytes(Util.htonl(i));
SetOptions(0x3b, buf);//Rebinding Time
i = (uint)leaseTime;
buf = BitConverter.GetBytes(Util.htonl(i));
SetOptions(0x33, buf);//Lease Time
//serverIp
byte [] dat = BitConverter.GetBytes(Util.htonl(serverIp.AddrV4));
SetOptions(0x36, dat);
//maskIp
buf = BitConverter.GetBytes(Util.htonl(maskIp.AddrV4));
SetOptions(0x01, buf);
//gwIp
buf = BitConverter.GetBytes(Util.htonl(gwIp.AddrV4));
SetOptions(0x03, buf);
//dnsIp0
buf = new byte[0];
if (dnsIp0 != null)
{
buf = BitConverter.GetBytes(Util.htonl(dnsIp0.AddrV4));
}
if (dnsIp1 != null)
{
byte [] tmp = BitConverter.GetBytes(Util.htonl(dnsIp1.AddrV4));
buf = Bytes.Create(buf, tmp);
}
if (buf.Length != 0)
{
SetOptions(0x06, buf);
}
//wpad
if (wpadUrl != null)
{
byte[] tmp = Encoding.ASCII.GetBytes(wpadUrl);
SetOptions(252, tmp);
}
}
buf = new byte[] { 0 };
switch (dhcpType)
{
case DhcpType.Discover:
buf[0] = 0x01;
break;
case DhcpType.Offer:
buf[0] = 0x02;
break;
case DhcpType.Request:
buf[0] = 0x03;
break;
case DhcpType.Decline:
buf[0] = 0x04;
break;
case DhcpType.Ack:
buf[0] = 0x05;
break;
case DhcpType.Nak:
buf[0] = 0x06;
break;
case DhcpType.Release:
buf[0] = 0x07;
break;
case DhcpType.Infrm:
buf[0] = 0x08;
break;
}
SetOptions(0x35, buf);
}
