MdeModulePkg/Include/Library/UdpIoLib.h

   1 /** @file
   2   This library is used to share code between UEFI network stack modules.
   3   It provides the helper routines to access UDP service. It is used by both DHCP and MTFTP.
   4
   5 Copyright (c) 2006 - 2010, 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 _UDP_IO_H_
  17 #define _UDP_IO_H_
  18
  19 #include <Protocol/Udp4.h>
  20 #include <Protocol/Udp6.h>
  21
  22 #include <Library/NetLib.h>
  23
  24 typedef struct _UDP_IO UDP_IO;
  25
  26 ///
  27 /// Signatures used by UdpIo Library.
  28 ///
  29
  30 #define UDP_IO_RX_SIGNATURE  SIGNATURE_32 ('U', 'D', 'P', 'R')
  31 #define UDP_IO_TX_SIGNATURE  SIGNATURE_32 ('U', 'D', 'P', 'T')
  32 #define UDP_IO_SIGNATURE     SIGNATURE_32 ('U', 'D', 'P', 'I')
  33
  34 #define UDP_IO_UDP4_VERSION  4
  35 #define UDP_IO_UDP6_VERSION  6
  36
  37 ///
  38 /// The UDP address pair.
  39 ///
  40 typedef struct {
  41   EFI_IP_ADDRESS            LocalAddr;
  42   UINT16                    LocalPort;
  43   EFI_IP_ADDRESS            RemoteAddr;
  44   UINT16                    RemotePort;
  45 } UDP_END_POINT;
  46
  47 /**
  48   Prototype called when receiving or sending packets to or from a UDP point.
  49
  50   This prototype is used by both receive and sending when calling
  51   UdpIoRecvDatagram() or UdpIoSendDatagram(). When receiving, Netbuf is allocated by the
  52   UDP access point and released by the user. When sending, the user allocates the the NetBuf,
  53   which is then provided to the callback as a reference.
  54
  55   @param[in] Packet       The packet received or sent.
  56   @param[in] EndPoint     The UDP address pair corresponds to the UDP IO.
  57   @param[in] IoStatus     The packet receiving or sending status.
  58   @param[in] Context      The user-defined data when calling UdpIoRecvDatagram() or
  59                           UdpIoSendDatagram().
  60 **/
  61 typedef
  62 VOID
  63 (EFIAPI *UDP_IO_CALLBACK) (
  64   IN NET_BUF                *Packet,
  65   IN UDP_END_POINT          *EndPoint,
  66   IN EFI_STATUS             IoStatus,
  67   IN VOID                   *Context
  68   );
  69
  70 ///
  71 /// This structure is used internally by the UdpIo Library.
  72 ///
  73 /// Each receive request is wrapped in an UDP_RX_TOKEN. Upon completion,
  74 /// the CallBack will be called. Only one receive request is sent to UDP at a
  75 /// time. HeadLen gives the length of the application's header. UDP_IO will
  76 /// make the application's header continuous before delivering up.
  77 ///
  78 typedef union {
  79   EFI_UDP4_COMPLETION_TOKEN   Udp4;
  80   EFI_UDP6_COMPLETION_TOKEN   Udp6;
  81 } UDP_COMPLETION_TOKEN;
  82
  83 typedef struct {
  84   UINT32                      Signature;
  85   UDP_IO                      *UdpIo;
  86
  87   UDP_IO_CALLBACK             CallBack;
  88   VOID                        *Context;
  89   UINT32                      HeadLen;
  90
  91   UDP_COMPLETION_TOKEN        Token;
  92 } UDP_RX_TOKEN;
  93
  94
  95
  96 ///
  97 /// This structure is used internally by UdpIo Library.
  98 ///
  99 /// Each transmit request is wrapped in an UDP_TX_TOKEN. Upon completion,
 100 /// the CallBack will be called. There can be several transmit requests. All transmit
 101 /// requests are linked in a list.
 102 ///
 103
 104 typedef union {
 105   EFI_UDP4_SESSION_DATA       Udp4;
 106   EFI_UDP6_SESSION_DATA       Udp6;
 107 } UDP_SESSION_DATA;
 108
 109 typedef union {
 110   EFI_UDP4_TRANSMIT_DATA      Udp4;
 111   EFI_UDP6_TRANSMIT_DATA      Udp6;
 112 } UDP_TRANSMIT_DATA;
 113
 114 typedef struct {
 115   UINT32                      Signature;
 116   LIST_ENTRY                  Link;
 117   UDP_IO                      *UdpIo;
 118   UDP_IO_CALLBACK             CallBack;
 119   NET_BUF                     *Packet;
 120   VOID                        *Context;
 121   EFI_IPv4_ADDRESS            Gateway;
 122   UDP_SESSION_DATA            Session;
 123   UDP_COMPLETION_TOKEN        Token;
 124   UDP_TRANSMIT_DATA           Data;
 125 } UDP_TX_TOKEN;
 126
 127 ///
 128 /// Type defined as UDP_IO.
 129 ///
 130 /// This data structure wraps the UDP instance and configuration.
 131 /// UdpIo Library uses this structure for all Udp4 or Udp6 operations.
 132 ///
 133 struct _UDP_IO {
 134   UINT32                    Signature;
 135   LIST_ENTRY                Link;
 136   INTN                      RefCnt;
 137   UINT8                     UdpVersion;
 138
 139   //
 140   // Handle used to create/destory UDP child
 141   //
 142   EFI_HANDLE                Controller;
 143   EFI_HANDLE                Image;
 144   EFI_HANDLE                UdpHandle;
 145
 146   EFI_SIMPLE_NETWORK_MODE   SnpMode;
 147
 148   LIST_ENTRY                SentDatagram;   ///< A list of UDP_TX_TOKEN.
 149   UDP_RX_TOKEN              *RecvRequest;
 150
 151   union {
 152     EFI_UDP4_PROTOCOL       *Udp4;
 153     EFI_UDP6_PROTOCOL       *Udp6;
 154   } Protocol;
 155
 156   union {
 157     EFI_UDP4_CONFIG_DATA    Udp4;
 158     EFI_UDP6_CONFIG_DATA    Udp6;
 159   } Config;
 160 };
 161
 162 /**
 163   The prototype called when UdpIo Library configures a UDP instance.
 164
 165   The prototype is set and called when creating a UDP_IO in UdpIoCreatePort().
 166
 167   @param[in] UdpIo         The UDP_IO to configure.
 168   @param[in] Context       The user-defined data when calling UdpIoCreatePort().
 169
 170   @retval EFI_SUCCESS  The configuration succeeded.
 171   @retval Others       The UDP_IO fails to configure indicating
 172                        UdpIoCreatePort() should fail.
 173 **/
 174 typedef
 175 EFI_STATUS
 176 (EFIAPI *UDP_IO_CONFIG) (
 177   IN UDP_IO                 *UdpIo,
 178   IN VOID                   *Context
 179   );
 180
 181 /**
 182   The select function to decide whether to cancel the UDP_TX_TOKEN.
 183
 184   @param[in] Token        The UDP_TX_TOKEN to decide whether to cancel.
 185   @param[in] Context      User-defined data in UdpIoCancelDgrams().
 186
 187   @retval TRUE        Cancel the UDP_TX_TOKEN.
 188   @retval FALSE       Do not cancel this UDP_TX_TOKEN.
 189
 190 **/
 191 typedef
 192 BOOLEAN
 193 (EFIAPI *UDP_IO_TO_CANCEL) (
 194   IN UDP_TX_TOKEN           *Token,
 195   IN VOID                   *Context
 196   );
 197
 198 /**
 199   Cancel all the sent datagram that pass the selection criteria of ToCancel.
 200   If ToCancel is NULL, all the datagrams are cancelled.
 201
 202   @param[in]  UdpIo                 The UDP_IO to cancel packet.
 203   @param[in]  IoStatus              The IoStatus to return to the packet owners.
 204   @param[in]  ToCancel              The select funtion to test whether to cancel this
 205                                     packet or not.
 206   @param[in]  Context               The opaque parameter to the ToCancel.
 207
 208 **/
 209 VOID
 210 EFIAPI
 211 UdpIoCancelDgrams (
 212   IN UDP_IO                 *UdpIo,
 213   IN EFI_STATUS             IoStatus,
 214   IN UDP_IO_TO_CANCEL       ToCancel,        OPTIONAL
 215   IN VOID                   *Context
 216   );
 217
 218 /**
 219   Creates a UDP_IO to access the UDP service. It creates and configures
 220   a UDP child.
 221
 222   It locates the UDP service binding prototype on the Controller parameter
 223   uses the UDP service binding prototype to create a UDP child (also known as
 224   a UDP instance) configures the UDP child by calling Configure function prototype.
 225   Any failures in creating or configuring the UDP child return NULL for failure.
 226
 227   @param[in]  Controller            The controller that has the UDP service binding.
 228                                     protocol installed.
 229   @param[in]  ImageHandle           The image handle for the driver.
 230   @param[in]  Configure             The function to configure the created UDP child.
 231   @param[in]  UdpVersion            The UDP protocol version, UDP4 or UDP6.
 232   @param[in]  Context               The opaque parameter for the Configure funtion.
 233
 234   @return The newly-created UDP_IO, or NULL if failed.
 235
 236 **/
 237 UDP_IO *
 238 EFIAPI
 239 UdpIoCreateIo (
 240   IN  EFI_HANDLE            Controller,
 241   IN  EFI_HANDLE            ImageHandle,
 242   IN  UDP_IO_CONFIG         Configure,
 243   IN  UINT8                 UdpVersion,
 244   IN  VOID                  *Context
 245   );
 246
 247 /**
 248   Free the UDP_IO and all its related resources.
 249
 250   The function cancels all sent datagrams and receive requests.
 251
 252   @param[in]  UdpIo             The UDP_IO to free.
 253
 254   @retval EFI_SUCCESS           The UDP_IO is freed.
 255
 256 **/
 257 EFI_STATUS
 258 EFIAPI
 259 UdpIoFreeIo (
 260   IN  UDP_IO                *UdpIo
 261   );
 262
 263 /**
 264   Cleans up the UDP_IO without freeing it. Call this function
 265   if you intend to later re-use the UDP_IO.
 266
 267   This function releases all transmitted datagrams and receive requests and configures NULL for the UDP instance.
 268
 269   @param[in]  UdpIo                 The UDP_IO to clean up.
 270
 271 **/
 272 VOID
 273 EFIAPI
 274 UdpIoCleanIo (
 275   IN  UDP_IO                *UdpIo
 276   );
 277
 278 /**
 279   Send a packet through the UDP_IO.
 280
 281   The packet will be wrapped in UDP_TX_TOKEN. Function Callback will be called
 282   when the packet is sent. The optional parameter EndPoint overrides the default
 283   address pair if specified.
 284
 285   @param[in]  UdpIo                 The UDP_IO to send the packet through.
 286   @param[in]  Packet                The packet to send.
 287   @param[in]  EndPoint              The local and remote access point. Override the
 288                                     default address pair set during configuration.
 289   @param[in]  Gateway               The gateway to use.
 290   @param[in]  CallBack              The function being called when packet is
 291                                     transmitted or failed.
 292   @param[in]  Context               The opaque parameter passed to CallBack.
 293
 294   @retval EFI_OUT_OF_RESOURCES  Failed to allocate resource for the packet.
 295   @retval EFI_SUCCESS           The packet is successfully delivered to UDP for
 296                                 transmission.
 297
 298 **/
 299 EFI_STATUS
 300 EFIAPI
 301 UdpIoSendDatagram (
 302   IN  UDP_IO                *UdpIo,
 303   IN  NET_BUF               *Packet,
 304   IN  UDP_END_POINT         *EndPoint OPTIONAL,
 305   IN  EFI_IP_ADDRESS        *Gateway  OPTIONAL,
 306   IN  UDP_IO_CALLBACK       CallBack,
 307   IN  VOID                  *Context
 308   );
 309
 310 /**
 311   Cancel a single sent datagram.
 312
 313   @param[in]  UdpIo                 The UDP_IO from which to cancel the packet
 314   @param[in]  Packet                The packet to cancel
 315
 316 **/
 317 VOID
 318 EFIAPI
 319 UdpIoCancelSentDatagram (
 320   IN  UDP_IO                *UdpIo,
 321   IN  NET_BUF               *Packet
 322   );
 323
 324 /**
 325   Issue a receive request to the UDP_IO.
 326
 327   This function is called when upper-layer needs packet from UDP for processing.
 328   Only one receive request is acceptable at a time. Therefore, one common usage model is
 329   to invoke this function inside its Callback function when the former packet
 330   is processed.
 331
 332   @param[in]  UdpIo                 The UDP_IO to receive the packet from.
 333   @param[in]  CallBack              The call back function to execute when the packet
 334                                     is received.
 335   @param[in]  Context               The opaque context passed to Callback.
 336   @param[in]  HeadLen               The length of the upper-layer's protocol header.
 337
 338   @retval EFI_ALREADY_STARTED   There is already a pending receive request. Only
 339                                 one receive request is supported at a time.
 340   @retval EFI_OUT_OF_RESOURCES  Failed to allocate needed resources.
 341   @retval EFI_SUCCESS           The receive request was issued successfully.
 342   @retval EFI_UNSUPPORTED       The UDP version in UDP_IO is not supported.
 343
 344 **/
 345 EFI_STATUS
 346 EFIAPI
 347 UdpIoRecvDatagram (
 348   IN  UDP_IO                *UdpIo,
 349   IN  UDP_IO_CALLBACK       CallBack,
 350   IN  VOID                  *Context,
 351   IN  UINT32                HeadLen
 352   );
 353
 354 #endif
 355