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audk/MdeModulePkg/Include/Library/UdpIoLib.h

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/** @file
The helper routines to access UDP service. It is used by both
DHCP and MTFTP.
Copyright (c) 2006 - 2008, Intel Corporation.<BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at<BR>
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _UDP4IO_H_
#define _UDP4IO_H_
#include <Protocol/Udp4.h>
#include <Library/UdpIoLib.h>
#include <Library/NetLib.h>
typedef struct _UDP_IO_PORT UDP_IO_PORT;
///
/// Signatures used by UdpIo Library.
///
typedef enum {
UDP_IO_RX_SIGNATURE = SIGNATURE_32 ('U', 'D', 'P', 'R'),
UDP_IO_TX_SIGNATURE = SIGNATURE_32 ('U', 'D', 'P', 'T'),
UDP_IO_SIGNATURE = SIGNATURE_32 ('U', 'D', 'P', 'I')
} UDP_IO_SIGNATURE_TYPE;
///
/// The Udp4 address pair.
///
typedef struct {
IP4_ADDR LocalAddr;
UINT16 LocalPort;
IP4_ADDR RemoteAddr;
UINT16 RemotePort;
} UDP_POINTS;
/**
Prototype called when receiving or sending packets from/to a UDP point.
This prototype is used by both receive and sending when calling
UdpIoRecvDatagram() or UdpIoSendDatagram(). When receiving, Netbuf is allocated by
UDP access point, and released by user. When sending, the NetBuf is from user,
and provided to the callback as a reference.
@param Packet Packet received or sent
@param Points The Udp4 address pair corresponds to the Udp4 IO
@param IoStatus Packet receiving or sending status
@param Context User-defined data when calling UdpIoRecvDatagram() or
UdpIoSendDatagram()
@return None
**/
typedef
VOID
(*UDP_IO_CALLBACK) (
IN NET_BUF *Packet,
IN UDP_POINTS *Points,
IN EFI_STATUS IoStatus,
IN VOID *Context
);
///
/// This structure is used internally by UdpIo Library.
///
/// Each receive request is wrapped in an UDP_RX_TOKEN. Upon completion,
/// the CallBack will be called. Only one receive request is sent to UDP at a
/// time. HeadLen gives the length of the application's header. UDP_IO will
/// make the application's header continuous before delivering up.
///
typedef struct {
UINT32 Signature;
UDP_IO_PORT *UdpIo;
UDP_IO_CALLBACK CallBack;
VOID *Context;
UINT32 HeadLen;
EFI_UDP4_COMPLETION_TOKEN UdpToken;
} UDP_RX_TOKEN;
///
/// This structure is used internally by UdpIo Library.
///
/// Each transmit request is wrapped in an UDP_TX_TOKEN. Upon completion,
/// the CallBack will be called. There can be several transmit requests and they
/// are linked in a list.
///
typedef struct {
UINT32 Signature;
LIST_ENTRY Link;
UDP_IO_PORT *UdpIo;
UDP_IO_CALLBACK CallBack;
NET_BUF *Packet;
VOID *Context;
EFI_UDP4_SESSION_DATA UdpSession;
EFI_IPv4_ADDRESS Gateway;
EFI_UDP4_COMPLETION_TOKEN UdpToken;
EFI_UDP4_TRANSMIT_DATA UdpTxData;
} UDP_TX_TOKEN;
///
/// Type defined as UDP_IO_PORT.
///
/// The data structure wraps Udp4 instance and its configuration. It is used by
/// UdpIo Library to do all Udp4 operations.
///
struct _UDP_IO_PORT {
UINT32 Signature;
LIST_ENTRY Link;
INTN RefCnt;
//
// Handle used to create/destory UDP child
//
EFI_HANDLE Controller;
EFI_HANDLE Image;
EFI_HANDLE UdpHandle;
EFI_UDP4_PROTOCOL *Udp; ///< The wrapped Udp4 instance.
EFI_UDP4_CONFIG_DATA UdpConfig;
EFI_SIMPLE_NETWORK_MODE SnpMode;
LIST_ENTRY SentDatagram; ///< A list of UDP_TX_TOKEN.
UDP_RX_TOKEN *RecvRequest;
};
/**
Prototype called when UdpIo Library configures a Udp4 instance.
The prototype is set and called when creating a UDP_IO_PORT in UdpIoCreatePort().
@param UdpIo The UDP_IO_PORT to configure
@param Context User-defined data when calling UdpIoCreatePort()
@retval EFI_SUCCESS The configure process succeeds
@retval Others The UDP_IO_PORT fails to configure indicating
UdpIoCreatePort() should fail
**/
typedef
EFI_STATUS
(*UDP_IO_CONFIG) (
IN UDP_IO_PORT *UdpIo,
IN VOID *Context
);
/**
The select function to decide whether to cancel the UDP_TX_TOKEN. It is used
@param Token The UDP_TX_TOKEN to decide whether to cancel
@param Context User-defined data in UdpIoCancelDgrams()
@retval TRUE To cancel the UDP_TX_TOKEN
@retval FALSE Do not cancel this UDP_TX_TOKEN
**/
typedef
BOOLEAN
(*UDP_IO_TO_CANCEL) (
IN UDP_TX_TOKEN *Token,
IN VOID *Context
);
/**
Create a UDP_IO_PORT to access the UDP service. It will create and configure
a UDP child.
The function will locate the UDP service binding prototype on the Controller
parameter and use it to create a UDP child (aka Udp instance). Then the UDP
child will be configured by calling Configure function prototype. Any failures
in creating or configure the UDP child will lead to the failure of UDP_IO_PORT
creation.
@param Controller The controller that has the UDP service binding
protocol installed.
@param Image The image handle for the driver.
@param Configure The function to configure the created UDP child
@param Context The opaque parameter for the Configure funtion.
@return Newly-created UDP_IO_PORT or NULL if failed.
**/
UDP_IO_PORT *
EFIAPI
UdpIoCreatePort (
IN EFI_HANDLE Controller,
IN EFI_HANDLE Image,
IN UDP_IO_CONFIG Configure,
IN VOID *Context
);
/**
Free the UDP_IO_PORT and all its related resources.
The function will cancel all sent datagram and receive request.
@param UdpIo The UDP_IO_PORT to free.
@retval EFI_SUCCESS The UDP_IO_PORT is freed.
**/
EFI_STATUS
EFIAPI
UdpIoFreePort (
IN UDP_IO_PORT *UdpIo
);
/**
Clean up the UDP_IO_PORT without freeing it. The function is called when
user wants to re-use the UDP_IO_PORT later.
It will release all the transmitted datagrams and receive request. It will
also configure NULL for the UDP instance.
@param UdpIo The UDP_IO_PORT to clean up.
**/
VOID
EFIAPI
UdpIoCleanPort (
IN UDP_IO_PORT *UdpIo
);
/**
Send a packet through the UDP_IO_PORT.
The packet will be wrapped in UDP_TX_TOKEN. Function Callback will be called
when the packet is sent. The optional parameter EndPoint overrides the default
address pair if specified.
@param UdpIo The UDP_IO_PORT to send the packet through
@param Packet The packet to send
@param EndPoint The local and remote access point. Override the
default address pair set during configuration.
@param Gateway The gateway to use
@param CallBack The function being called when packet is
transmitted or failed.
@param Context The opaque parameter passed to CallBack
@retval EFI_OUT_OF_RESOURCES Failed to allocate resource for the packet
@retval EFI_SUCCESS The packet is successfully delivered to UDP for
transmission.
**/
EFI_STATUS
EFIAPI
UdpIoSendDatagram (
IN UDP_IO_PORT *UdpIo,
IN NET_BUF *Packet,
IN UDP_POINTS *EndPoint OPTIONAL,
IN IP4_ADDR Gateway,
IN UDP_IO_CALLBACK CallBack,
IN VOID *Context
);
/**
Cancel a single sent datagram.
@param UdpIo The UDP_IO_PORT to cancel the packet from
@param Packet The packet to cancel
**/
VOID
EFIAPI
UdpIoCancelSentDatagram (
IN UDP_IO_PORT *UdpIo,
IN NET_BUF *Packet
);
/**
Issue a receive request to the UDP_IO_PORT.
This function is called when upper-layer needs packet from UDP for processing.
Only one receive request is acceptable at a time so a common usage model is
to invoke this function inside its Callback function when the former packet
is processed.
@param UdpIo The UDP_IO_PORT to receive the packet from.
@param CallBack The call back function to execute when the packet
is received.
@param Context The opaque context passed to Callback
@param HeadLen The length of the upper-layer's protocol header
@retval EFI_ALREADY_STARTED There is already a pending receive request. Only
one receive request is supported at a time.
@retval EFI_OUT_OF_RESOURCES Failed to allocate needed resources.
@retval EFI_SUCCESS The receive request is issued successfully.
**/
EFI_STATUS
EFIAPI
UdpIoRecvDatagram (
IN UDP_IO_PORT *UdpIo,
IN UDP_IO_CALLBACK CallBack,
IN VOID *Context,
IN UINT32 HeadLen
);
#endif
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