mirror of https://github.com/acidanthera/audk.git
185 lines
5.5 KiB
C
185 lines
5.5 KiB
C
/** @file
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Copyright (c) 2006 - 2008, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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Dhcp4Impl.h
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Abstract:
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EFI DHCP protocol implementation
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RFCs supported are:
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RFC 2131: Dynamic Host Configuration Protocol
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RFC 2132: DHCP Options and BOOTP Vendor Extensions
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RFC 1534: Interoperation Between DHCP and BOOTP
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RFC 3396: Encoding Long Options in DHCP
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**/
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#ifndef __EFI_DHCP4_IMPL_H__
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#define __EFI_DHCP4_IMPL_H__
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#include <PiDxe.h>
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#include <Protocol/Dhcp4.h>
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#include <Protocol/Udp4.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/UefiLib.h>
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#include <Library/BaseLib.h>
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#include <Library/NetLib.h>
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typedef struct _DHCP_SERVICE DHCP_SERVICE;
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typedef struct _DHCP_PROTOCOL DHCP_PROTOCOL;
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#include "Dhcp4Option.h"
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#include "Dhcp4Io.h"
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#define DHCP_SERVICE_SIGNATURE SIGNATURE_32 ('D', 'H', 'C', 'P')
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#define DHCP_PROTOCOL_SIGNATURE SIGNATURE_32 ('d', 'h', 'c', 'p')
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typedef enum {
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//
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// The state of the DHCP service. It starts as UNCONFIGED. If
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// and active child configures the service successfully, it
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// goes to CONFIGED. If the active child configures NULL, it
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// goes back to UNCONFIGED. It becomes DESTORY if it is (partly)
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// destoried.
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//
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DHCP_UNCONFIGED = 0,
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DHCP_CONFIGED,
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DHCP_DESTORY
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} DHCP_STATE;
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struct _DHCP_PROTOCOL {
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UINT32 Signature;
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EFI_DHCP4_PROTOCOL Dhcp4Protocol;
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LIST_ENTRY Link;
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EFI_HANDLE Handle;
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DHCP_SERVICE *Service;
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BOOLEAN InDestory;
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EFI_EVENT CompletionEvent;
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EFI_EVENT RenewRebindEvent;
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EFI_DHCP4_TRANSMIT_RECEIVE_TOKEN *Token;
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UDP_IO_PORT *UdpIo; // The UDP IO used for TransmitReceive.
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UINT32 Timeout;
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NET_BUF_QUEUE ResponseQueue;
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};
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//
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// DHCP driver is specical in that it is a singleton. Although it
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// has a service binding, there can be only one active child.
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//
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struct _DHCP_SERVICE {
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UINT32 Signature;
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EFI_SERVICE_BINDING_PROTOCOL ServiceBinding;
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INTN ServiceState; // CONFIGED, UNCONFIGED, and DESTORY
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BOOLEAN InDestory;
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EFI_HANDLE Controller;
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EFI_HANDLE Image;
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LIST_ENTRY Children;
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UINTN NumChildren;
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INTN DhcpState;
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EFI_STATUS IoStatus; // the result of last user operation
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UINT32 Xid;
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IP4_ADDR ClientAddr; // lease IP or configured client address
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IP4_ADDR Netmask;
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IP4_ADDR ServerAddr;
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EFI_DHCP4_PACKET *LastOffer; // The last received offer
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EFI_DHCP4_PACKET *Selected;
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DHCP_PARAMETER *Para;
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UINT32 Lease;
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UINT32 T1;
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UINT32 T2;
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INTN ExtraRefresh; // This refresh is reqested by user
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UDP_IO_PORT *UdpIo; // Udp child receiving all DHCP message
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UDP_IO_PORT *LeaseIoPort; // Udp child with lease IP
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NET_BUF *LastPacket; // The last sent packet for retransmission
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EFI_MAC_ADDRESS Mac;
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UINT8 HwType;
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UINT8 HwLen;
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UINT8 ClientAddressSendOut[16];
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DHCP_PROTOCOL *ActiveChild;
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EFI_DHCP4_CONFIG_DATA ActiveConfig;
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UINT32 UserOptionLen;
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//
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// Timer event and various timer
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//
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EFI_EVENT Timer;
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UINT32 PacketToLive; // Retransmission timer for our packets
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INTN CurRetry;
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INTN MaxRetries;
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UINT32 LeaseLife;
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};
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typedef struct {
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EFI_DHCP4_PACKET_OPTION **Option;
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UINT32 OptionCount;
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UINT32 Index;
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} DHCP_PARSE_CONTEXT;
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#define DHCP_INSTANCE_FROM_THIS(Proto) \
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CR ((Proto), DHCP_PROTOCOL, Dhcp4Protocol, DHCP_PROTOCOL_SIGNATURE)
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#define DHCP_SERVICE_FROM_THIS(Sb) \
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CR ((Sb), DHCP_SERVICE, ServiceBinding, DHCP_SERVICE_SIGNATURE)
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extern EFI_DHCP4_PROTOCOL mDhcp4ProtocolTemplate;
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/**
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Give up the control of the DHCP service to let other child
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resume. Don't change the service's DHCP state and the Client
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address and option list configure as required by RFC2131.
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@param DhcpSb The DHCP service instance.
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@return None
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**/
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VOID
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DhcpYieldControl (
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IN DHCP_SERVICE *DhcpSb
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);
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/**
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Complete a Dhcp4 transaction and signal the upper layer.
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@param Instance Dhcp4 instance.
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@return None.
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**/
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VOID
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PxeDhcpDone (
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IN DHCP_PROTOCOL *Instance
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);
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#endif
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