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/** @file
This library is used to share code between UEFI network stack modules.
It provides the helper routines to access UDP service. It is used by both DHCP and MTFTP.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _UDP_IO_H_
#define _UDP_IO_H_
#include <Protocol/Udp4.h>
#include <Protocol/Udp6.h>
#include <Library/NetLib.h>
typedef struct _UDP_IO UDP_IO;
///
/// Signatures used by UdpIo Library.
///
#define UDP_IO_RX_SIGNATURE SIGNATURE_32 ('U', 'D', 'P', 'R')
#define UDP_IO_TX_SIGNATURE SIGNATURE_32 ('U', 'D', 'P', 'T')
#define UDP_IO_SIGNATURE SIGNATURE_32 ('U', 'D', 'P', 'I')
#define UDP_IO_UDP4_VERSION 4
#define UDP_IO_UDP6_VERSION 6
///
/// The UDP address pair.
///
typedef struct {
EFI_IP_ADDRESS LocalAddr;
UINT16 LocalPort;
EFI_IP_ADDRESS RemoteAddr;
UINT16 RemotePort;
} UDP_END_POINT;
/**
Prototype called when receiving or sending packets to or from a UDP point.
This prototype is used by both receive and sending when calling
UdpIoRecvDatagram() or UdpIoSendDatagram(). When receiving, Netbuf is allocated by the
UDP access point and released by the user. When sending, the user allocates the NetBuf,
which is then provided to the callback as a reference.
@param[in] Packet The packet received or sent.
@param[in] EndPoint The UDP address pair corresponds to the UDP IO.
@param[in] IoStatus The packet receiving or sending status.
@param[in] Context The user-defined data when calling UdpIoRecvDatagram() or
UdpIoSendDatagram().
**/
typedef
VOID
(EFIAPI *UDP_IO_CALLBACK)(
IN NET_BUF *Packet,
IN UDP_END_POINT *EndPoint,
IN EFI_STATUS IoStatus,
IN VOID *Context
);
///
/// This structure is used internally by the 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 union {
EFI_UDP4_COMPLETION_TOKEN Udp4;
EFI_UDP6_COMPLETION_TOKEN Udp6;
} UDP_COMPLETION_TOKEN;
typedef struct {
UINT32 Signature;
UDP_IO *UdpIo;
UDP_IO_CALLBACK CallBack;
VOID *Context;
UINT32 HeadLen;
UDP_COMPLETION_TOKEN Token;
} 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. All transmit
/// requests are linked in a list.
///
typedef union {
EFI_UDP4_SESSION_DATA Udp4;
EFI_UDP6_SESSION_DATA Udp6;
} UDP_SESSION_DATA;
typedef union {
EFI_UDP4_TRANSMIT_DATA Udp4;
EFI_UDP6_TRANSMIT_DATA Udp6;
} UDP_TRANSMIT_DATA;
typedef struct {
UINT32 Signature;
LIST_ENTRY Link;
UDP_IO *UdpIo;
UDP_IO_CALLBACK CallBack;
NET_BUF *Packet;
VOID *Context;
EFI_IPv4_ADDRESS Gateway;
UDP_SESSION_DATA Session;
UDP_COMPLETION_TOKEN Token;
UDP_TRANSMIT_DATA Data;
} UDP_TX_TOKEN;
///
/// Type defined as UDP_IO.
///
/// This data structure wraps the UDP instance and configuration.
/// UdpIo Library uses this structure for all Udp4 or Udp6 operations.
///
struct _UDP_IO {
UINT32 Signature;
LIST_ENTRY Link;
INTN RefCnt;
UINT8 UdpVersion;
//
// Handle used to create/destroy UDP child
//
EFI_HANDLE Controller;
EFI_HANDLE Image;
EFI_HANDLE UdpHandle;
EFI_SIMPLE_NETWORK_MODE SnpMode;
LIST_ENTRY SentDatagram; ///< A list of UDP_TX_TOKEN.
UDP_RX_TOKEN *RecvRequest;
union {
EFI_UDP4_PROTOCOL *Udp4;
EFI_UDP6_PROTOCOL *Udp6;
} Protocol;
union {
EFI_UDP4_CONFIG_DATA Udp4;
EFI_UDP6_CONFIG_DATA Udp6;
} Config;
};
/**
The prototype called when UdpIo Library configures a UDP instance.
The prototype is set and called when creating a UDP_IO in UdpIoCreatePort().
@param[in] UdpIo The UDP_IO to configure.
@param[in] Context The user-defined data when calling UdpIoCreatePort().
@retval EFI_SUCCESS The configuration succeeded.
@retval Others The UDP_IO fails to configure indicating
UdpIoCreatePort() should fail.
**/
typedef
EFI_STATUS
(EFIAPI *UDP_IO_CONFIG)(
IN UDP_IO *UdpIo,
IN VOID *Context
);
/**
The select function to decide whether to cancel the UDP_TX_TOKEN.
@param[in] Token The UDP_TX_TOKEN to decide whether to cancel.
@param[in] Context User-defined data in UdpIoCancelDgrams().
@retval TRUE Cancel the UDP_TX_TOKEN.
@retval FALSE Do not cancel this UDP_TX_TOKEN.
**/
typedef
BOOLEAN
(EFIAPI *UDP_IO_TO_CANCEL)(
IN UDP_TX_TOKEN *Token,
IN VOID *Context
);
/**
Cancel all the sent datagram that pass the selection criteria of ToCancel.
If ToCancel is NULL, all the datagrams are cancelled.
If Udp version is not UDP_IO_UDP4_VERSION or UDP_IO_UDP6_VERSION, then ASSERT().
@param[in] UdpIo The UDP_IO to cancel packet.
@param[in] IoStatus The IoStatus to return to the packet owners.
@param[in] ToCancel The select function to test whether to cancel this
packet or not.
@param[in] Context The opaque parameter to the ToCancel.
**/
VOID
EFIAPI
UdpIoCancelDgrams (
IN UDP_IO *UdpIo,
IN EFI_STATUS IoStatus,
IN UDP_IO_TO_CANCEL ToCancel OPTIONAL,
IN VOID *Context OPTIONAL
);
/**
Creates a UDP_IO to access the UDP service. It creates and configures
a UDP child.
If Configure is NULL, then ASSERT().
If Udp version is not UDP_IO_UDP4_VERSION or UDP_IO_UDP6_VERSION, then ASSERT().
It locates the UDP service binding prototype on the Controller parameter
uses the UDP service binding prototype to create a UDP child (also known as
a UDP instance) configures the UDP child by calling Configure function prototype.
Any failures in creating or configuring the UDP child return NULL for failure.
@param[in] Controller The controller that has the UDP service binding.
protocol installed.
@param[in] ImageHandle The image handle for the driver.
@param[in] Configure The function to configure the created UDP child.
@param[in] UdpVersion The UDP protocol version, UDP4 or UDP6.
@param[in] Context The opaque parameter for the Configure function.
@return The newly-created UDP_IO, or NULL if failed.
**/
UDP_IO *
EFIAPI
UdpIoCreateIo (
IN EFI_HANDLE Controller,
IN EFI_HANDLE ImageHandle,
IN UDP_IO_CONFIG Configure,
IN UINT8 UdpVersion,
IN VOID *Context
);
/**
Free the UDP_IO and all its related resources.
If Udp version is not UDP_IO_UDP4_VERSION or UDP_IO_UDP6_VERSION, then ASSERT().
The function cancels all sent datagrams and receive requests.
@param[in] UdpIo The UDP_IO to free.
@retval EFI_SUCCESS The UDP_IO is freed.
@retval Others Failed to free UDP_IO.
**/
EFI_STATUS
EFIAPI
UdpIoFreeIo (
IN UDP_IO *UdpIo
);
/**
Cleans up the UDP_IO without freeing it. Call this function
if you intend to later re-use the UDP_IO.
If Udp version is not UDP_IO_UDP4_VERSION or UDP_IO_UDP6_VERSION, then ASSERT().
This function releases all transmitted datagrams and receive requests and configures NULL for the UDP instance.
@param[in] UdpIo The UDP_IO to clean up.
**/
VOID
EFIAPI
UdpIoCleanIo (
IN UDP_IO *UdpIo
);
/**
Send a packet through the UDP_IO.
If Udp version is not UDP_IO_UDP4_VERSION or UDP_IO_UDP6_VERSION, then ASSERT().
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[in] UdpIo The UDP_IO to send the packet through.
@param[in] Packet The packet to send.
@param[in] EndPoint The local and remote access point. Override the
default address pair set during configuration.
@param[in] Gateway The gateway to use.
@param[in] CallBack The function being called when packet is
transmitted or failed.
@param[in] 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 *UdpIo,
IN NET_BUF *Packet,
IN UDP_END_POINT *EndPoint OPTIONAL,
IN EFI_IP_ADDRESS *Gateway OPTIONAL,
IN UDP_IO_CALLBACK CallBack,
IN VOID *Context
);
/**
Cancel a single sent datagram.
@param[in] UdpIo The UDP_IO from which to cancel the packet
@param[in] Packet The packet to cancel
**/
VOID
EFIAPI
UdpIoCancelSentDatagram (
IN UDP_IO *UdpIo,
IN NET_BUF *Packet
);
/**
Issue a receive request to the UDP_IO.
If Udp version is not UDP_IO_UDP4_VERSION or UDP_IO_UDP6_VERSION, then ASSERT().
This function is called when upper-layer needs packet from UDP for processing.
Only one receive request is acceptable at a time. Therefore, one common usage model is
to invoke this function inside its Callback function when the former packet
is processed.
@param[in] UdpIo The UDP_IO to receive the packet from.
@param[in] CallBack The call back function to execute when the packet
is received.
@param[in] Context The opaque context passed to Callback.
@param[in] 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 was issued successfully.
@retval EFI_UNSUPPORTED The UDP version in UDP_IO is not supported.
**/
EFI_STATUS
EFIAPI
UdpIoRecvDatagram (
IN UDP_IO *UdpIo,
IN UDP_IO_CALLBACK CallBack,
IN VOID *Context,
IN UINT32 HeadLen
);
#endif
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