/** @file
  UDP4 Service Binding Protocol as defined in UEFI specification.

  The EFI UDPv4 Protocol provides simple packet-oriented services
  to transmit and receive UDP packets.

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

  @par Revision Reference:
  This Protocol is introduced in UEFI Specification 2.0.

**/

#ifndef __EFI_UDP4_PROTOCOL_H__
#define __EFI_UDP4_PROTOCOL_H__

#include <Protocol/Ip4.h>
//
// GUID definitions
//
#define EFI_UDP4_SERVICE_BINDING_PROTOCOL_GUID \
  { \
    0x83f01464, 0x99bd, 0x45e5, {0xb3, 0x83, 0xaf, 0x63, 0x05, 0xd8, 0xe9, 0xe6 } \
  }

#define EFI_UDP4_PROTOCOL_GUID \
  { \
    0x3ad9df29, 0x4501, 0x478d, {0xb1, 0xf8, 0x7f, 0x7f, 0xe7, 0x0e, 0x50, 0xf3 } \
  }

typedef struct _EFI_UDP4_PROTOCOL EFI_UDP4_PROTOCOL;

///
/// EFI_UDP4_SERVICE_POINT is deprecated in the UEFI 2.4B and should not be used any more.
/// The definition in here is only present to provide backwards compatability.
///
typedef struct {
  EFI_HANDLE          InstanceHandle;
  EFI_IPv4_ADDRESS    LocalAddress;
  UINT16              LocalPort;
  EFI_IPv4_ADDRESS    RemoteAddress;
  UINT16              RemotePort;
} EFI_UDP4_SERVICE_POINT;

///
/// EFI_UDP4_VARIABLE_DATA is deprecated in the UEFI 2.4B and should not be used any more.
/// The definition in here is only present to provide backwards compatability.
///
typedef struct {
  EFI_HANDLE                DriverHandle;
  UINT32                    ServiceCount;
  EFI_UDP4_SERVICE_POINT    Services[1];
} EFI_UDP4_VARIABLE_DATA;

typedef struct {
  UINT32    FragmentLength;
  VOID      *FragmentBuffer;
} EFI_UDP4_FRAGMENT_DATA;

typedef struct {
  EFI_IPv4_ADDRESS    SourceAddress;
  UINT16              SourcePort;
  EFI_IPv4_ADDRESS    DestinationAddress;
  UINT16              DestinationPort;
} EFI_UDP4_SESSION_DATA;
typedef struct {
  //
  // Receiving Filters
  //
  BOOLEAN             AcceptBroadcast;
  BOOLEAN             AcceptPromiscuous;
  BOOLEAN             AcceptAnyPort;
  BOOLEAN             AllowDuplicatePort;
  //
  // I/O parameters
  //
  UINT8               TypeOfService;
  UINT8               TimeToLive;
  BOOLEAN             DoNotFragment;
  UINT32              ReceiveTimeout;
  UINT32              TransmitTimeout;
  //
  // Access Point
  //
  BOOLEAN             UseDefaultAddress;
  EFI_IPv4_ADDRESS    StationAddress;
  EFI_IPv4_ADDRESS    SubnetMask;
  UINT16              StationPort;
  EFI_IPv4_ADDRESS    RemoteAddress;
  UINT16              RemotePort;
} EFI_UDP4_CONFIG_DATA;

typedef struct {
  EFI_UDP4_SESSION_DATA     *UdpSessionData;       // OPTIONAL
  EFI_IPv4_ADDRESS          *GatewayAddress;       // OPTIONAL
  UINT32                    DataLength;
  UINT32                    FragmentCount;
  EFI_UDP4_FRAGMENT_DATA    FragmentTable[1];
} EFI_UDP4_TRANSMIT_DATA;

typedef struct {
  EFI_TIME                  TimeStamp;
  EFI_EVENT                 RecycleSignal;
  EFI_UDP4_SESSION_DATA     UdpSession;
  UINT32                    DataLength;
  UINT32                    FragmentCount;
  EFI_UDP4_FRAGMENT_DATA    FragmentTable[1];
} EFI_UDP4_RECEIVE_DATA;

typedef struct {
  EFI_EVENT     Event;
  EFI_STATUS    Status;
  union {
    EFI_UDP4_RECEIVE_DATA     *RxData;
    EFI_UDP4_TRANSMIT_DATA    *TxData;
  } Packet;
} EFI_UDP4_COMPLETION_TOKEN;

/**
  Reads the current operational settings.

  The GetModeData() function copies the current operational settings of this EFI
  UDPv4 Protocol instance into user-supplied buffers. This function is used
  optionally to retrieve the operational mode data of underlying networks or
  drivers.

  @param  This           The pointer to the EFI_UDP4_PROTOCOL instance.
  @param  Udp4ConfigData The pointer to the buffer to receive the current configuration data.
  @param  Ip4ModeData    The pointer to the EFI IPv4 Protocol mode data structure.
  @param  MnpConfigData  The pointer to the managed network configuration data structure.
  @param  SnpModeData    The pointer to the simple network mode data structure.

  @retval EFI_SUCCESS           The mode data was read.
  @retval EFI_NOT_STARTED       When Udp4ConfigData is queried, no configuration data is
                                available because this instance has not been started.
  @retval EFI_INVALID_PARAMETER This is NULL.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UDP4_GET_MODE_DATA)(
  IN  EFI_UDP4_PROTOCOL                *This,
  OUT EFI_UDP4_CONFIG_DATA             *Udp4ConfigData OPTIONAL,
  OUT EFI_IP4_MODE_DATA                *Ip4ModeData    OPTIONAL,
  OUT EFI_MANAGED_NETWORK_CONFIG_DATA  *MnpConfigData  OPTIONAL,
  OUT EFI_SIMPLE_NETWORK_MODE          *SnpModeData    OPTIONAL
  );

/**
  Initializes, changes, or resets the operational parameters for this instance of the EFI UDPv4
  Protocol.

  The Configure() function is used to do the following:
  * Initialize and start this instance of the EFI UDPv4 Protocol.
  * Change the filtering rules and operational parameters.
  * Reset this instance of the EFI UDPv4 Protocol.
  Until these parameters are initialized, no network traffic can be sent or
  received by this instance. This instance can be also reset by calling Configure()
  with UdpConfigData set to NULL. Once reset, the receiving queue and transmitting
  queue are flushed and no traffic is allowed through this instance.
  With different parameters in UdpConfigData, Configure() can be used to bind
  this instance to specified port.

  @param  This           The pointer to the EFI_UDP4_PROTOCOL instance.
  @param  Udp4ConfigData The pointer to the buffer to receive the current configuration data.

  @retval EFI_SUCCESS           The configuration settings were set, changed, or reset successfully.
  @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP,
                                RARP, etc.) is not finished yet.
  @retval EFI_INVALID_PARAMETER This is NULL.
  @retval EFI_INVALID_PARAMETER UdpConfigData.StationAddress is not a valid unicast IPv4 address.
  @retval EFI_INVALID_PARAMETER UdpConfigData.SubnetMask is not a valid IPv4 address mask. The subnet
                                mask must be contiguous.
  @retval EFI_INVALID_PARAMETER UdpConfigData.RemoteAddress is not a valid unicast IPv4 address if it
                                is not zero.
  @retval EFI_ALREADY_STARTED   The EFI UDPv4 Protocol instance is already started/configured
                                and must be stopped/reset before it can be reconfigured.
  @retval EFI_ACCESS_DENIED     UdpConfigData. AllowDuplicatePort is FALSE
                                and UdpConfigData.StationPort is already used by
                                other instance.
  @retval EFI_OUT_OF_RESOURCES  The EFI UDPv4 Protocol driver cannot allocate memory for this
                                EFI UDPv4 Protocol instance.
  @retval EFI_DEVICE_ERROR      An unexpected network or system error occurred and this instance
                                 was not opened.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UDP4_CONFIGURE)(
  IN EFI_UDP4_PROTOCOL      *This,
  IN EFI_UDP4_CONFIG_DATA   *UdpConfigData OPTIONAL
  );

/**
  Joins and leaves multicast groups.

  The Groups() function is used to enable and disable the multicast group
  filtering. If the JoinFlag is FALSE and the MulticastAddress is NULL, then all
  currently joined groups are left.

  @param  This             The pointer to the EFI_UDP4_PROTOCOL instance.
  @param  JoinFlag         Set to TRUE to join a multicast group. Set to FALSE to leave one
                           or all multicast groups.
  @param  MulticastAddress The pointer to multicast group address to join or leave.

  @retval EFI_SUCCESS           The operation completed successfully.
  @retval EFI_NOT_STARTED       The EFI UDPv4 Protocol instance has not been started.
  @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP,
                                RARP, etc.) is not finished yet.
  @retval EFI_OUT_OF_RESOURCES  Could not allocate resources to join the group.
  @retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
                                - This is NULL.
                                - JoinFlag is TRUE and MulticastAddress is NULL.
                                - JoinFlag is TRUE and *MulticastAddress is not
                                  a valid multicast address.
  @retval EFI_ALREADY_STARTED   The group address is already in the group table (when
                                JoinFlag is TRUE).
  @retval EFI_NOT_FOUND         The group address is not in the group table (when JoinFlag is
                                FALSE).
  @retval EFI_DEVICE_ERROR      An unexpected system or network error occurred.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UDP4_GROUPS)(
  IN EFI_UDP4_PROTOCOL      *This,
  IN BOOLEAN                JoinFlag,
  IN EFI_IPv4_ADDRESS       *MulticastAddress    OPTIONAL
  );

/**
  Adds and deletes routing table entries.

  The Routes() function adds a route to or deletes a route from the routing table.
  Routes are determined by comparing the SubnetAddress with the destination IP
  address and arithmetically AND-ing it with the SubnetMask. The gateway address
  must be on the same subnet as the configured station address.
  The default route is added with SubnetAddress and SubnetMask both set to 0.0.0.0.
  The default route matches all destination IP addresses that do not match any
  other routes.
  A zero GatewayAddress is a nonroute. Packets are sent to the destination IP
  address if it can be found in the Address Resolution Protocol (ARP) cache or
  on the local subnet. One automatic nonroute entry will be inserted into the
  routing table for outgoing packets that are addressed to a local subnet
  (gateway address of 0.0.0.0).
  Each instance of the EFI UDPv4 Protocol has its own independent routing table.
  Instances of the EFI UDPv4 Protocol that use the default IP address will also
  have copies of the routing table provided by the EFI_IP4_CONFIG_PROTOCOL. These
  copies will be updated automatically whenever the IP driver reconfigures its
  instances; as a result, the previous modification to these copies will be lost.

  @param  This           The pointer to the EFI_UDP4_PROTOCOL instance.
  @param  DeleteRoute    Set to TRUE to delete this route from the routing table.
                         Set to FALSE to add this route to the routing table.
  @param  SubnetAddress  The destination network address that needs to be routed.
  @param  SubnetMask     The subnet mask of SubnetAddress.
  @param  GatewayAddress The gateway IP address for this route.

  @retval EFI_SUCCESS           The operation completed successfully.
  @retval EFI_NOT_STARTED       The EFI UDPv4 Protocol instance has not been started.
  @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP,
                                - RARP, etc.) is not finished yet.
  @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
  @retval EFI_OUT_OF_RESOURCES  Could not add the entry to the routing table.
  @retval EFI_NOT_FOUND         This route is not in the routing table.
  @retval EFI_ACCESS_DENIED     The route is already defined in the routing table.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UDP4_ROUTES)(
  IN EFI_UDP4_PROTOCOL      *This,
  IN BOOLEAN                DeleteRoute,
  IN EFI_IPv4_ADDRESS       *SubnetAddress,
  IN EFI_IPv4_ADDRESS       *SubnetMask,
  IN EFI_IPv4_ADDRESS       *GatewayAddress
  );

/**
  Polls for incoming data packets and processes outgoing data packets.

  The Poll() function can be used by network drivers and applications to increase
  the rate that data packets are moved between the communications device and the
  transmit and receive queues.
  In some systems, the periodic timer event in the managed network driver may not
  poll the underlying communications device fast enough to transmit and/or receive
  all data packets without missing incoming packets or dropping outgoing packets.
  Drivers and applications that are experiencing packet loss should try calling
  the Poll() function more often.

  @param  This The pointer to the EFI_UDP4_PROTOCOL instance.

  @retval EFI_SUCCESS           Incoming or outgoing data was processed.
  @retval EFI_INVALID_PARAMETER This is NULL.
  @retval EFI_DEVICE_ERROR      An unexpected system or network error occurred.
  @retval EFI_TIMEOUT           Data was dropped out of the transmit and/or receive queue.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UDP4_POLL)(
  IN EFI_UDP4_PROTOCOL      *This
  );

/**
  Places an asynchronous receive request into the receiving queue.

  The Receive() function places a completion token into the receive packet queue.
  This function is always asynchronous.
  The caller must fill in the Token.Event field in the completion token, and this
  field cannot be NULL. When the receive operation completes, the EFI UDPv4 Protocol
  driver updates the Token.Status and Token.Packet.RxData fields and the Token.Event
  is signaled. Providing a proper notification function and context for the event
  will enable the user to receive the notification and receiving status. That
  notification function is guaranteed to not be re-entered.

  @param  This  The pointer to the EFI_UDP4_PROTOCOL instance.
  @param  Token The pointer to a token that is associated with the receive data
                descriptor.

  @retval EFI_SUCCESS           The receive completion token was cached.
  @retval EFI_NOT_STARTED       This EFI UDPv4 Protocol instance has not been started.
  @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP, RARP, etc.)
                                is not finished yet.
  @retval EFI_INVALID_PARAMETER This is NULL.
  @retval EFI_INVALID_PARAMETER Token is NULL.
  @retval EFI_INVALID_PARAMETER Token.Event is NULL.
  @retval EFI_OUT_OF_RESOURCES  The receive completion token could not be queued due to a lack of system
                                resources (usually memory).
  @retval EFI_DEVICE_ERROR      An unexpected system or network error occurred.
  @retval EFI_ACCESS_DENIED     A receive completion token with the same Token.Event was already in
                                the receive queue.
  @retval EFI_NOT_READY         The receive request could not be queued because the receive queue is full.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UDP4_RECEIVE)(
  IN EFI_UDP4_PROTOCOL          *This,
  IN EFI_UDP4_COMPLETION_TOKEN  *Token
  );

/**
  Queues outgoing data packets into the transmit queue.

  The Transmit() function places a sending request to this instance of the EFI
  UDPv4 Protocol, alongside the transmit data that was filled by the user. Whenever
  the packet in the token is sent out or some errors occur, the Token.Event will
  be signaled and Token.Status is updated. Providing a proper notification function
  and context for the event will enable the user to receive the notification and
  transmitting status.

  @param  This  The pointer to the EFI_UDP4_PROTOCOL instance.
  @param  Token The pointer to the completion token that will be placed into the
                transmit queue.

  @retval EFI_SUCCESS           The data has been queued for transmission.
  @retval EFI_NOT_STARTED       This EFI UDPv4 Protocol instance has not been started.
  @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP,
                                RARP, etc.) is not finished yet.
  @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
  @retval EFI_ACCESS_DENIED     The transmit completion token with the same
                                Token.Event was already in the transmit queue.
  @retval EFI_NOT_READY         The completion token could not be queued because the
                                transmit queue is full.
  @retval EFI_OUT_OF_RESOURCES  Could not queue the transmit data.
  @retval EFI_NOT_FOUND         There is no route to the destination network or address.
  @retval EFI_BAD_BUFFER_SIZE   The data length is greater than the maximum UDP packet
                                size. Or the length of the IP header + UDP header + data
                                length is greater than MTU if DoNotFragment is TRUE.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UDP4_TRANSMIT)(
  IN EFI_UDP4_PROTOCOL           *This,
  IN EFI_UDP4_COMPLETION_TOKEN   *Token
  );

/**
  Aborts an asynchronous transmit or receive request.

  The Cancel() function is used to abort a pending transmit or receive request.
  If the token is in the transmit or receive request queues, after calling this
  function, Token.Status will be set to EFI_ABORTED and then Token.Event will be
  signaled. If the token is not in one of the queues, which usually means that
  the asynchronous operation has completed, this function will not signal the
  token and EFI_NOT_FOUND is returned.

  @param  This  The pointer to the EFI_UDP4_PROTOCOL instance.
  @param  Token The pointer to a token that has been issued by
                EFI_UDP4_PROTOCOL.Transmit() or
                EFI_UDP4_PROTOCOL.Receive().If NULL, all pending
                tokens are aborted.

  @retval  EFI_SUCCESS           The asynchronous I/O request was aborted and Token.Event
                                 was signaled. When Token is NULL, all pending requests are
                                 aborted and their events are signaled.
  @retval  EFI_INVALID_PARAMETER This is NULL.
  @retval  EFI_NOT_STARTED       This instance has not been started.
  @retval  EFI_NO_MAPPING        When using the default address, configuration (DHCP, BOOTP,
                                 RARP, etc.) is not finished yet.
  @retval  EFI_NOT_FOUND         When Token is not NULL, the asynchronous I/O request was
                                 not found in the transmit or receive queue. It has either completed
                                 or was not issued by Transmit() and Receive().

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UDP4_CANCEL)(
  IN EFI_UDP4_PROTOCOL          *This,
  IN EFI_UDP4_COMPLETION_TOKEN  *Token  OPTIONAL
  );

///
/// The EFI_UDP4_PROTOCOL defines an EFI UDPv4 Protocol session that can be used
/// by any network drivers, applications, or daemons to transmit or receive UDP packets.
/// This protocol instance can either be bound to a specified port as a service or
/// connected to some remote peer as an active client. Each instance has its own settings,
/// such as the routing table and group table, which are independent from each other.
///
struct _EFI_UDP4_PROTOCOL {
  EFI_UDP4_GET_MODE_DATA    GetModeData;
  EFI_UDP4_CONFIGURE        Configure;
  EFI_UDP4_GROUPS           Groups;
  EFI_UDP4_ROUTES           Routes;
  EFI_UDP4_TRANSMIT         Transmit;
  EFI_UDP4_RECEIVE          Receive;
  EFI_UDP4_CANCEL           Cancel;
  EFI_UDP4_POLL             Poll;
};

extern EFI_GUID  gEfiUdp4ServiceBindingProtocolGuid;
extern EFI_GUID  gEfiUdp4ProtocolGuid;

#endif