internal override void ReceiveEvent(DhcpFormat dhcp)
{
//DebugStub.WriteLine("FSM DHCP packet SELECTING.\n");
// Check if message is in response to our request
if (dhcp.BootMessageType != DhcpFormat.BootType.Reply ||
dhcp.TransactionID != client.TransactionID ||
dhcp.GetHardwareAddress() != client.MacAddress)
{
DebugStub.WriteLine("FSM DHCP bad id.\n");
return;
}
IPv4 serverAddress = dhcp.NextServerIPAddress;
// Check if offered address is valid (ie not zero
// and below class E)
IPv4 offeredAddress = dhcp.YourIPAddress;
if (offeredAddress == IPv4.Any || offeredAddress.IsMulticast())
{
DebugStub.WriteLine("FSM DHCP multicast addr.\n");
return;
}
// Check if message is an offer
SortedList offeredOptions = dhcp.GetOptions();
DhcpByteOption messageType
= offeredOptions[DhcpMessageType.OptionCode] as DhcpByteOption;
if (messageType == null ||
messageType.Value != (byte)DhcpFormat.MessageType.Offer)
{
DebugStub.WriteLine("FSM DHCP not an offer.\n");
return;
}
// Must have parameters
byte [] parameters = new byte [] {
DhcpSubnetMask.OptionCode,
DhcpRouter.OptionCode,
// DhcpDomainNameServer.OptionCode
};
foreach (byte p in parameters)
{
IDhcpOption ido = offeredOptions[p] as IDhcpOption;
if (ido == null)
{
DebugStub.WriteLine("FSM DHCP missing option 0x{0:x2}.\n", DebugStub.ArgList(p));
return;
}
}
client.CancelStateTimeout();
client.ChangeState(new DhcpClientStateRequesting(client,
serverAddress,
offeredAddress,
offeredOptions));
}
internal override void ReceiveEvent(DhcpFormat dhcp)
{
//DebugStub.WriteLine("FSM DHCP packet REQUESTING.\n");
// Check if message is in response to our request
if (dhcp.BootMessageType != DhcpFormat.BootType.Reply ||
dhcp.TransactionID != client.TransactionID ||
dhcp.GetHardwareAddress() != client.MacAddress)
{
return;
}
IPv4 serverAddress = dhcp.NextServerIPAddress;
// Check if offered address is valid (ie not zero
// and below class E)
IPv4 offeredAddress = dhcp.YourIPAddress;
if (offeredAddress == IPv4.Any || offeredAddress.IsMulticast())
{
return;
}
// Check if message is an ack
SortedList offeredOptions = dhcp.GetOptions();
DhcpByteOption messageType
= offeredOptions[DhcpMessageType.OptionCode] as DhcpByteOption;
if (messageType == null)
{
return;
}
switch (messageType.Value)
{
case (byte)DhcpFormat.MessageType.Ack:
break;
case (byte)DhcpFormat.MessageType.Nak:
client.ChangeState(new DhcpClientStateInitialize(client));
return;
default:
return;
}
// Must have parameters
byte [] parameters = new byte [] {
DhcpSubnetMask.OptionCode,
DhcpRouter.OptionCode,
// DhcpDomainNameServer.OptionCode
};
foreach (byte p in parameters)
{
IDhcpOption ido = offeredOptions[p] as IDhcpOption;
if (ido == null)
{
return;
}
}
client.CancelStateTimeout();
client.ChangeState(new DhcpClientStateBound(client,
serverAddress,
offeredAddress,
offeredOptions));
}
static IDhcpOption ParseDhcpOption(
byte optionCode,
byte length,
byte[] srcBuffer,
int offset)
{
byte type = optionCode;
switch (optionCode)
{
case DhcpSubnetMask.OptionCode:
return(DhcpIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpTimeOffset.OptionCode:
return(DhcpDWordOption.Parse(type, length, srcBuffer, offset));
case DhcpRouter.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpTimeServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpNameServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpDomainNameServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpLogServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpCookieServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpLprServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpImpressServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpResourceLocationServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpHostName.OptionCode:
return(DhcpStringOption.Parse(type, length, srcBuffer, offset));
case DhcpBootFileSize.OptionCode:
return(DhcpWordOption.Parse(type, length, srcBuffer, offset));
case DhcpMeritDumpFile.OptionCode:
return(DhcpStringOption.Parse(type, length, srcBuffer, offset));
case DhcpDomainName.OptionCode:
return(DhcpStringOption.Parse(type, length, srcBuffer, offset));
case DhcpSwapServer.OptionCode:
return(DhcpIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpRootPath.OptionCode:
return(DhcpStringOption.Parse(type, length, srcBuffer, offset));
case DhcpExtensionsPath.OptionCode:
return(DhcpStringOption.Parse(type, length, srcBuffer, offset));
case DhcpIPForwarding.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpForwardRemoteSourceRoute.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpPolicyFilter.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpMaximumDatagramReassembly.OptionCode:
return(DhcpWordOption.Parse(type, length, srcBuffer, offset));
case DhcpDefaultTtl.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpPathMtuAgingTimeout.OptionCode:
return(DhcpDWordOption.Parse(type, length, srcBuffer, offset));
case DhcpPathMtuPlateauTable.OptionCode:
return(DhcpMultiWordOption.Parse(type, length, srcBuffer, offset));
case DhcpInterfaceMtu.OptionCode:
return(DhcpWordOption.Parse(type, length, srcBuffer, offset));
case DhcpAllSubnetsLocal.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpBroadcastAddress.OptionCode:
return(DhcpIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpMaskDiscovery.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpMaskSupplier.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpRouterDiscovery.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpRouterSolicitationAddress.OptionCode:
return(DhcpIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpStaticRoutes.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpTrailerEncapsulate.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpArpCacheTimeout.OptionCode:
return(DhcpDWordOption.Parse(type, length, srcBuffer, offset));
case DhcpEthernetEncapsulation.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpTcpDefaultTtl.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpTcpKeepalive.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpTcpKeepaliveGarbage.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpNisDomain.OptionCode:
return(DhcpStringOption.Parse(type, length, srcBuffer, offset));
case DhcpNisServers.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpNtpServers.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpVendorSpecific.OptionCode:
return(DhcpMultiByteOption.Parse(type, length, srcBuffer, offset));
case DhcpNetBiosNameServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpNetBiosDistributionServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpNetBiosType.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpNetBiosScope.OptionCode:
return(DhcpMultiDWordOption.Parse(type, length, srcBuffer, offset));
case DhcpXWindowsFontServer.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpXWindowsDisplayManager.OptionCode:
return(DhcpMultiIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpRequestedIPAddress.OptionCode:
return(DhcpIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpIPAddressLeaseTime.OptionCode:
return(DhcpDWordOption.Parse(type, length, srcBuffer, offset));
case DhcpOverloadIndicator.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpMessageType.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
case DhcpServerID.OptionCode:
return(DhcpIPv4Option.Parse(type, length, srcBuffer, offset));
case DhcpParameterRequest.OptionCode:
return(DhcpMultiByteOption.Parse(type, length, srcBuffer, offset));
case DhcpMessage.OptionCode:
return(DhcpStringOption.Parse(type, length, srcBuffer, offset));
case DhcpMaximumMessageSize.OptionCode:
return(DhcpWordOption.Parse(type, length, srcBuffer, offset));
case DhcpRenewalTime.OptionCode:
return(DhcpDWordOption.Parse(type, length, srcBuffer, offset));
case DhcpRebindingTime.OptionCode:
return(DhcpDWordOption.Parse(type, length, srcBuffer, offset));
case DhcpClassID.OptionCode:
return(DhcpStringOption.Parse(type, length, srcBuffer, offset));
case DhcpClientID.OptionCode:
return(DhcpMultiByteOption.Parse(type, length, srcBuffer, offset));
case DhcpAutoConfigure.OptionCode:
return(DhcpByteOption.Parse(type, length, srcBuffer, offset));
default: return(null);
}
}
