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/** @file
Functions implementation related with DHCPv4/v6 for DNS driver.
Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _DNS_DHCP_H_
#define _DNS_DHCP_H_
//
// DHCP DNS related
//
#pragma pack(1)
#define IP4_ETHER_PROTO 0x0800
#define DHCP4_OPCODE_REQUEST 1
#define DHCP4_MAGIC 0x63538263 /// network byte order
#define DHCP4_TAG_EOP 255 /// End Option
#define DHCP4_TAG_TYPE 53
#define DHCP4_MSG_REQUEST 3
#define DHCP4_MSG_INFORM 8
#define DHCP4_TAG_PARA_LIST 55
#define DHCP4_TAG_DNS_SERVER 6
#define DHCP6_TAG_DNS_REQUEST 6
#define DHCP6_TAG_DNS_SERVER 23
#define DNS_CHECK_MEDIA_GET_DHCP_WAITING_TIME EFI_TIMER_PERIOD_SECONDS(20)
//
// The required Dns4 server information.
//
typedef struct {
UINT32 *ServerCount;
EFI_IPv4_ADDRESS *ServerList;
} DNS4_SERVER_INFOR;
//
// The required Dns6 server information.
//
typedef struct {
UINT32 *ServerCount;
EFI_IPv6_ADDRESS *ServerList;
} DNS6_SERVER_INFOR;
#pragma pack()
/**
Parse the ACK to get required information
@param Dhcp4 The DHCP4 protocol.
@param Packet Packet waiting for parse.
@param DnsServerInfor The required Dns4 server information.
@retval EFI_SUCCESS The DNS information is got from the DHCP ACK.
@retval EFI_NO_MAPPING DHCP failed to acquire address and other information.
@retval EFI_DEVICE_ERROR Other errors as indicated.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
ParseDhcp4Ack (
IN EFI_DHCP4_PROTOCOL *Dhcp4,
IN EFI_DHCP4_PACKET *Packet,
IN DNS4_SERVER_INFOR *DnsServerInfor
);
/**
EFI_DHCP6_INFO_CALLBACK is provided by the consumer of the EFI DHCPv6 Protocol
instance to intercept events that occurs in the DHCPv6 Information Request
exchange process.
@param This Pointer to the EFI_DHCP6_PROTOCOL instance that
is used to configure this callback function.
@param Context Pointer to the context that is initialized in
the EFI_DHCP6_PROTOCOL.InfoRequest().
@param Packet Pointer to Reply packet that has been received.
The EFI DHCPv6 Protocol instance is responsible
for freeing the buffer.
@retval EFI_SUCCESS The DNS information is got from the DHCP ACK.
@retval EFI_DEVICE_ERROR Other errors as indicated.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
ParseDhcp6Ack (
IN EFI_DHCP6_PROTOCOL *This,
IN VOID *Context,
IN EFI_DHCP6_PACKET *Packet
);
/**
Parse the DHCP ACK to get Dns4 server information.
@param Instance The DNS instance.
@param DnsServerCount Retrieved Dns4 server Ip count.
@param DnsServerList Retrieved Dns4 server Ip list.
@retval EFI_SUCCESS The Dns4 information is got from the DHCP ACK.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
@retval EFI_NO_MEDIA There was a media error.
@retval Others Other errors as indicated.
**/
EFI_STATUS
GetDns4ServerFromDhcp4 (
IN DNS_INSTANCE *Instance,
OUT UINT32 *DnsServerCount,
OUT EFI_IPv4_ADDRESS **DnsServerList
);
/**
Parse the DHCP ACK to get Dns6 server information.
@param Image The handle of the driver image.
@param Controller The handle of the controller.
@param DnsServerCount Retrieved Dns6 server Ip count.
@param DnsServerList Retrieved Dns6 server Ip list.
@retval EFI_SUCCESS The Dns6 information is got from the DHCP ACK.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
@retval EFI_NO_MEDIA There was a media error.
@retval Others Other errors as indicated.
**/
EFI_STATUS
GetDns6ServerFromDhcp6 (
IN EFI_HANDLE Image,
IN EFI_HANDLE Controller,
OUT UINT32 *DnsServerCount,
OUT EFI_IPv6_ADDRESS **DnsServerList
);
#endif
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