MdeModulePkg/Include/Library/UdpIoLib.h

   1 /** @file
   2   The helper routines to access UDP service. It is used by both
   3   DHCP and MTFTP.
   4
   5 Copyright (c) 2006 - 2008, Intel Corporation.<BR>
   6 All rights reserved. This program and the accompanying materials
   7 are licensed and made available under the terms and conditions of the BSD License
   8 which accompanies this distribution.  The full text of the license may be found at<BR>
   9 http://opensource.org/licenses/bsd-license.php
  10
  11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #ifndef _UDP4IO_H_
  17 #define _UDP4IO_H_
  18
  19 #include <Protocol/Udp4.h>
  20
  21 #include <Library/UdpIoLib.h>
  22 #include <Library/NetLib.h>
  23
  24 typedef struct _UDP_IO_PORT UDP_IO_PORT;
  25
  26 ///
  27 /// Signatures used by UdpIo Library.
  28 ///
  29 typedef enum {
  30   UDP_IO_RX_SIGNATURE = SIGNATURE_32 ('U', 'D', 'P', 'R'),
  31   UDP_IO_TX_SIGNATURE = SIGNATURE_32 ('U', 'D', 'P', 'T'),
  32   UDP_IO_SIGNATURE    = SIGNATURE_32 ('U', 'D', 'P', 'I')
  33 } UDP_IO_SIGNATURE_TYPE;
  34
  35 ///
  36 /// The Udp4 address pair.
  37 ///
  38 typedef struct {
  39   IP4_ADDR                  LocalAddr;
  40   UINT16                    LocalPort;
  41   IP4_ADDR                  RemoteAddr;
  42   UINT16                    RemotePort;
  43 } UDP_POINTS;
  44
  45 /**
  46   Prototype called when receiving or sending packets from/to a UDP point.
  47
  48   This prototype is used by both receive and sending when calling
  49   UdpIoRecvDatagram() or UdpIoSendDatagram(). When receiving, Netbuf is allocated by
  50   UDP access point, and released by user. When sending, the NetBuf is from user,
  51   and provided to the callback as a reference.
  52
  53   @param[in] Packet       Packet received or sent
  54   @param[in] Points       The Udp4 address pair corresponds to the Udp4 IO
  55   @param[in] IoStatus     Packet receiving or sending status
  56   @param[in] Context      User-defined data when calling UdpIoRecvDatagram() or
  57                           UdpIoSendDatagram()
  58 **/
  59 typedef
  60 VOID
  61 (*UDP_IO_CALLBACK) (
  62   IN NET_BUF                *Packet,
  63   IN UDP_POINTS             *Points,
  64   IN EFI_STATUS             IoStatus,
  65   IN VOID                   *Context
  66   );
  67
  68 ///
  69 /// This structure is used internally by UdpIo Library.
  70 ///
  71 /// Each receive request is wrapped in an UDP_RX_TOKEN. Upon completion,
  72 /// the CallBack will be called. Only one receive request is sent to UDP at a
  73 /// time. HeadLen gives the length of the application's header. UDP_IO will
  74 /// make the application's header continuous before delivering up.
  75 ///
  76 typedef struct {
  77   UINT32                    Signature;
  78   UDP_IO_PORT               *UdpIo;
  79
  80   UDP_IO_CALLBACK           CallBack;
  81   VOID                      *Context;
  82
  83   UINT32                    HeadLen;
  84   EFI_UDP4_COMPLETION_TOKEN UdpToken;
  85 } UDP_RX_TOKEN;
  86
  87 ///
  88 /// This structure is used internally by UdpIo Library.
  89 ///
  90 /// Each transmit request is wrapped in an UDP_TX_TOKEN. Upon completion,
  91 /// the CallBack will be called. There can be several transmit requests and they
  92 /// are linked in a list.
  93 ///
  94 typedef struct {
  95   UINT32                    Signature;
  96   LIST_ENTRY                Link;
  97   UDP_IO_PORT               *UdpIo;
  98
  99   UDP_IO_CALLBACK           CallBack;
 100   NET_BUF                   *Packet;
 101   VOID                      *Context;
 102
 103   EFI_UDP4_SESSION_DATA     UdpSession;
 104   EFI_IPv4_ADDRESS          Gateway;
 105
 106   EFI_UDP4_COMPLETION_TOKEN UdpToken;
 107   EFI_UDP4_TRANSMIT_DATA    UdpTxData;
 108 } UDP_TX_TOKEN;
 109
 110 ///
 111 /// Type defined as UDP_IO_PORT.
 112 ///
 113 /// The data structure wraps Udp4 instance and its configuration. It is used by
 114 /// UdpIo Library to do all Udp4 operations.
 115 ///
 116 struct _UDP_IO_PORT {
 117   UINT32                    Signature;
 118   LIST_ENTRY                Link;
 119   INTN                      RefCnt;
 120
 121   //
 122   // Handle used to create/destory UDP child
 123   //
 124   EFI_HANDLE                Controller;
 125   EFI_HANDLE                Image;
 126   EFI_HANDLE                UdpHandle;
 127
 128   EFI_UDP4_PROTOCOL         *Udp;           ///< The wrapped Udp4 instance.
 129   EFI_UDP4_CONFIG_DATA      UdpConfig;
 130   EFI_SIMPLE_NETWORK_MODE   SnpMode;
 131
 132   LIST_ENTRY                SentDatagram;   ///< A list of UDP_TX_TOKEN.
 133   UDP_RX_TOKEN              *RecvRequest;
 134 };
 135
 136 /**
 137   Prototype called when UdpIo Library configures a Udp4 instance.
 138
 139   The prototype is set and called when creating a UDP_IO_PORT in UdpIoCreatePort().
 140
 141   @param[in] UdpIo         The UDP_IO_PORT to configure
 142   @param[in] Context       User-defined data when calling UdpIoCreatePort()
 143
 144   @retval EFI_SUCCESS  The configure process succeeds
 145   @retval Others       The UDP_IO_PORT fails to configure indicating
 146                        UdpIoCreatePort() should fail
 147 **/
 148 typedef
 149 EFI_STATUS
 150 (*UDP_IO_CONFIG) (
 151   IN UDP_IO_PORT            *UdpIo,
 152   IN VOID                   *Context
 153   );
 154
 155 /**
 156   The select function to decide whether to cancel the UDP_TX_TOKEN.
 157
 158   @param[in] Token        The UDP_TX_TOKEN to decide whether to cancel
 159   @param[in] Context      User-defined data in UdpIoCancelDgrams()
 160
 161   @retval TRUE        To cancel the UDP_TX_TOKEN
 162   @retval FALSE       Do not cancel this UDP_TX_TOKEN
 163
 164 **/
 165 typedef
 166 BOOLEAN
 167 (*UDP_IO_TO_CANCEL) (
 168   IN UDP_TX_TOKEN           *Token,
 169   IN VOID                   *Context
 170   );
 171
 172 /**
 173   Create a UDP_IO_PORT to access the UDP service. It will create and configure
 174   a UDP child.
 175
 176   The function will locate the UDP service binding prototype on the Controller
 177   parameter and use it to create a UDP child (aka Udp instance). Then the UDP
 178   child will be configured by calling Configure function prototype. Any failures
 179   in creating or configure the UDP child will lead to the failure of UDP_IO_PORT
 180   creation.
 181
 182   @param[in]  Controller            The controller that has the UDP service binding.
 183                                     protocol installed.
 184   @param[in]  Image                 The image handle for the driver.
 185   @param[in]  Configure             The function to configure the created UDP child.
 186   @param[in]  Context               The opaque parameter for the Configure funtion.
 187
 188   @return Newly-created UDP_IO_PORT or NULL if failed.
 189
 190 **/
 191 UDP_IO_PORT *
 192 EFIAPI
 193 UdpIoCreatePort (
 194   IN  EFI_HANDLE            Controller,
 195   IN  EFI_HANDLE            Image,
 196   IN  UDP_IO_CONFIG         Configure,
 197   IN  VOID                  *Context
 198   );
 199
 200 /**
 201   Free the UDP_IO_PORT and all its related resources.
 202
 203   The function will cancel all sent datagram and receive request.
 204
 205   @param[in]  UdpIo                 The UDP_IO_PORT to free.
 206
 207   @retval EFI_SUCCESS           The UDP_IO_PORT is freed.
 208
 209 **/
 210 EFI_STATUS
 211 EFIAPI
 212 UdpIoFreePort (
 213   IN  UDP_IO_PORT           *UdpIo
 214   );
 215
 216 /**
 217   Clean up the UDP_IO_PORT without freeing it. The function is called when
 218   user wants to re-use the UDP_IO_PORT later.
 219
 220   It will release all the transmitted datagrams and receive request. It will
 221   also configure NULL for the UDP instance.
 222
 223   @param[in]  UdpIo                 The UDP_IO_PORT to clean up.
 224
 225 **/
 226 VOID
 227 EFIAPI
 228 UdpIoCleanPort (
 229   IN  UDP_IO_PORT           *UdpIo
 230   );
 231
 232 /**
 233   Send a packet through the UDP_IO_PORT.
 234
 235   The packet will be wrapped in UDP_TX_TOKEN. Function Callback will be called
 236   when the packet is sent. The optional parameter EndPoint overrides the default
 237   address pair if specified.
 238
 239   @param[in]  UdpIo                 The UDP_IO_PORT to send the packet through.
 240   @param[in]  Packet                The packet to send.
 241   @param[in]  EndPoint              The local and remote access point. Override the
 242                                     default address pair set during configuration.
 243   @param[in]  Gateway               The gateway to use.
 244   @param[in]  CallBack              The function being called when packet is
 245                                     transmitted or failed.
 246   @param[in]  Context               The opaque parameter passed to CallBack.
 247
 248   @retval EFI_OUT_OF_RESOURCES  Failed to allocate resource for the packet.
 249   @retval EFI_SUCCESS           The packet is successfully delivered to UDP  for
 250                                 transmission.
 251
 252 **/
 253 EFI_STATUS
 254 EFIAPI
 255 UdpIoSendDatagram (
 256   IN  UDP_IO_PORT           *UdpIo,
 257   IN  NET_BUF               *Packet,
 258   IN  UDP_POINTS            *EndPoint, OPTIONAL
 259   IN  IP4_ADDR              Gateway,
 260   IN  UDP_IO_CALLBACK       CallBack,
 261   IN  VOID                  *Context
 262   );
 263
 264 /**
 265   Cancel a single sent datagram.
 266
 267   @param[in]  UdpIo                 The UDP_IO_PORT to cancel the packet from
 268   @param[in]  Packet                The packet to cancel
 269
 270 **/
 271 VOID
 272 EFIAPI
 273 UdpIoCancelSentDatagram (
 274   IN  UDP_IO_PORT           *UdpIo,
 275   IN  NET_BUF               *Packet
 276   );
 277
 278 /**
 279   Issue a receive request to the UDP_IO_PORT.
 280
 281   This function is called when upper-layer needs packet from UDP for processing.
 282   Only one receive request is acceptable at a time so a common usage model is
 283   to invoke this function inside its Callback function when the former packet
 284   is processed.
 285
 286   @param[in]  UdpIo                 The UDP_IO_PORT to receive the packet from.
 287   @param[in]  CallBack              The call back function to execute when the packet
 288                                     is received.
 289   @param[in]  Context               The opaque context passed to Callback.
 290   @param[in] HeadLen                The length of the upper-layer's protocol header.
 291
 292   @retval EFI_ALREADY_STARTED   There is already a pending receive request. Only
 293                                 one receive request is supported at a time.
 294   @retval EFI_OUT_OF_RESOURCES  Failed to allocate needed resources.
 295   @retval EFI_SUCCESS           The receive request is issued successfully.
 296
 297 **/
 298 EFI_STATUS
 299 EFIAPI
 300 UdpIoRecvDatagram (
 301   IN  UDP_IO_PORT           *UdpIo,
 302   IN  UDP_IO_CALLBACK       CallBack,
 303   IN  VOID                  *Context,
 304   IN  UINT32                HeadLen
 305   );
 306 #endif