1 | /** @file
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2 | UEFI HTTP boot driver's private data structure and interfaces declaration.
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3 |
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4 | Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
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5 | (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
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6 | SPDX-License-Identifier: BSD-2-Clause-Patent
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7 |
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8 | **/
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9 |
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10 | #ifndef __EFI_HTTP_BOOT_DXE_H__
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11 | #define __EFI_HTTP_BOOT_DXE_H__
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12 |
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13 | #include <Uefi.h>
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14 |
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15 | #include <IndustryStandard/Http11.h>
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16 | #include <IndustryStandard/Dhcp.h>
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17 |
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18 | //
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19 | // Libraries
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20 | //
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21 | #include <Library/UefiBootServicesTableLib.h>
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22 | #include <Library/UefiHiiServicesLib.h>
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23 | #include <Library/UefiRuntimeServicesTableLib.h>
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24 | #include <Library/MemoryAllocationLib.h>
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25 | #include <Library/BaseLib.h>
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26 | #include <Library/UefiLib.h>
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27 | #include <Library/DevicePathLib.h>
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28 | #include <Library/DebugLib.h>
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29 | #include <Library/NetLib.h>
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30 | #include <Library/HttpLib.h>
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31 | #include <Library/HiiLib.h>
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32 | #include <Library/PrintLib.h>
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33 | #include <Library/DpcLib.h>
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34 |
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35 | //
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36 | // UEFI Driver Model Protocols
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37 | //
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38 | #include <Protocol/DriverBinding.h>
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39 | #include <Protocol/ComponentName2.h>
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40 | #include <Protocol/ComponentName.h>
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41 |
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42 | //
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43 | // Consumed Protocols
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44 | //
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45 | #include <Protocol/ServiceBinding.h>
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46 | #include <Protocol/HiiConfigAccess.h>
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47 | #include <Protocol/NetworkInterfaceIdentifier.h>
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48 | #include <Protocol/Dhcp4.h>
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49 | #include <Protocol/Dhcp6.h>
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50 | #include <Protocol/Dns6.h>
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51 | #include <Protocol/Http.h>
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52 | #include <Protocol/Ip4Config2.h>
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53 | #include <Protocol/Ip6Config.h>
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54 | #include <Protocol/RamDisk.h>
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55 | #include <Protocol/AdapterInformation.h>
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56 |
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57 | //
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58 | // Produced Protocols
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59 | //
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60 | #include <Protocol/LoadFile.h>
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61 | #include <Protocol/HttpBootCallback.h>
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62 |
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63 | //
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64 | // Consumed Guids
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65 | //
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66 | #include <Guid/HttpBootConfigHii.h>
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67 |
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68 | //
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69 | // Driver Version
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70 | //
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71 | #define HTTP_BOOT_DXE_VERSION 0xa
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72 |
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73 | //
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74 | // Standard Media Types defined in
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75 | // http://www.iana.org/assignments/media-types
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76 | //
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77 | #define HTTP_CONTENT_TYPE_APP_EFI "application/efi"
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78 | #define HTTP_CONTENT_TYPE_APP_IMG "application/vnd.efi-img"
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79 | #define HTTP_CONTENT_TYPE_APP_ISO "application/vnd.efi-iso"
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80 |
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81 | //
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82 | // Protocol instances
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83 | //
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84 | extern EFI_DRIVER_BINDING_PROTOCOL gHttpBootDxeDriverBinding;
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85 | extern EFI_COMPONENT_NAME2_PROTOCOL gHttpBootDxeComponentName2;
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86 | extern EFI_COMPONENT_NAME_PROTOCOL gHttpBootDxeComponentName;
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87 |
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88 | //
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89 | // Private data structure
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90 | //
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91 | typedef struct _HTTP_BOOT_PRIVATE_DATA HTTP_BOOT_PRIVATE_DATA;
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92 | typedef struct _HTTP_BOOT_VIRTUAL_NIC HTTP_BOOT_VIRTUAL_NIC;
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93 |
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94 | typedef enum {
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95 | ImageTypeEfi,
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96 | ImageTypeVirtualCd,
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97 | ImageTypeVirtualDisk,
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98 | ImageTypeMax
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99 | } HTTP_BOOT_IMAGE_TYPE;
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100 |
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101 | //
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102 | // Include files with internal function prototypes
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103 | //
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104 | #include "HttpBootComponentName.h"
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105 | #include "HttpBootDhcp4.h"
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106 | #include "HttpBootDhcp6.h"
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107 | #include "HttpBootImpl.h"
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108 | #include "HttpBootSupport.h"
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109 | #include "HttpBootClient.h"
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110 | #include "HttpBootConfig.h"
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111 |
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112 | typedef union {
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113 | HTTP_BOOT_DHCP4_PACKET_CACHE Dhcp4;
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114 | HTTP_BOOT_DHCP6_PACKET_CACHE Dhcp6;
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115 | } HTTP_BOOT_DHCP_PACKET_CACHE;
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116 |
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117 | struct _HTTP_BOOT_VIRTUAL_NIC {
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118 | UINT32 Signature;
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119 | EFI_HANDLE Controller;
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120 | EFI_HANDLE ImageHandle;
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121 | EFI_LOAD_FILE_PROTOCOL LoadFile;
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122 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;
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123 | HTTP_BOOT_PRIVATE_DATA *Private;
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124 | };
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125 |
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126 | #define HTTP_BOOT_PRIVATE_DATA_FROM_CALLBACK_INFO(Callback) \
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127 | CR ( \
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128 | Callback, \
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129 | HTTP_BOOT_PRIVATE_DATA, \
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130 | CallbackInfo, \
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131 | HTTP_BOOT_PRIVATE_DATA_SIGNATURE \
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132 | )
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133 |
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134 | #define HTTP_BOOT_PRIVATE_DATA_FROM_CALLBACK_PROTOCOL(CallbackProtocol) \
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135 | CR ( \
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136 | CallbackProtocol, \
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137 | HTTP_BOOT_PRIVATE_DATA, \
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138 | LoadFileCallback, \
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139 | HTTP_BOOT_PRIVATE_DATA_SIGNATURE \
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140 | )
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141 |
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142 | struct _HTTP_BOOT_PRIVATE_DATA {
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143 | UINT32 Signature;
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144 | EFI_HANDLE Controller;
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145 |
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146 | HTTP_BOOT_VIRTUAL_NIC *Ip4Nic;
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147 | HTTP_BOOT_VIRTUAL_NIC *Ip6Nic;
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148 |
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149 | //
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150 | // Cousumed children
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151 | //
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152 | EFI_HANDLE Ip6Child;
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153 | EFI_HANDLE Dhcp4Child;
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154 | EFI_HANDLE Dhcp6Child;
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155 | HTTP_IO HttpIo;
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156 | BOOLEAN HttpCreated;
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157 |
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158 | //
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159 | // Consumed protocol
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160 | //
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161 | EFI_NETWORK_INTERFACE_IDENTIFIER_PROTOCOL *Nii;
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162 | EFI_IP6_PROTOCOL *Ip6;
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163 | EFI_IP4_CONFIG2_PROTOCOL *Ip4Config2;
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164 | EFI_IP6_CONFIG_PROTOCOL *Ip6Config;
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165 | EFI_DHCP4_PROTOCOL *Dhcp4;
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166 | EFI_DHCP6_PROTOCOL *Dhcp6;
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167 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
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168 |
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169 |
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170 | //
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171 | // Produced protocol
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172 | //
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173 | EFI_LOAD_FILE_PROTOCOL LoadFile;
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174 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;
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175 | UINT32 Id;
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176 | EFI_HTTP_BOOT_CALLBACK_PROTOCOL *HttpBootCallback;
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177 | EFI_HTTP_BOOT_CALLBACK_PROTOCOL LoadFileCallback;
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178 |
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179 | //
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180 | // Data for the default HTTP Boot callback protocol
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181 | //
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182 | UINT64 FileSize;
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183 | UINT64 ReceivedSize;
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184 | UINT32 Percentage;
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185 |
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186 | //
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187 | // HII callback info block
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188 | //
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189 | HTTP_BOOT_FORM_CALLBACK_INFO CallbackInfo;
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190 |
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191 | //
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192 | // Mode data
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193 | //
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194 | BOOLEAN UsingIpv6;
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195 | BOOLEAN Started;
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196 | EFI_IP_ADDRESS StationIp;
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197 | EFI_IP_ADDRESS SubnetMask;
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198 | EFI_IP_ADDRESS GatewayIp;
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199 | EFI_IP_ADDRESS ServerIp;
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200 | UINT16 Port;
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201 | UINT32 DnsServerCount;
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202 | EFI_IP_ADDRESS *DnsServerIp;
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203 |
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204 | //
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205 | // The URI string attempt to download through HTTP, may point to
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206 | // the memory in cached DHCP offer, or to the memory in FilePathUri.
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207 | //
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208 | CHAR8 *BootFileUri;
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209 | VOID *BootFileUriParser;
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210 | UINTN BootFileSize;
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211 | BOOLEAN NoGateway;
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212 | HTTP_BOOT_IMAGE_TYPE ImageType;
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213 |
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214 | //
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215 | // URI string extracted from the input FilePath parameter.
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216 | //
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217 | CHAR8 *FilePathUri;
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218 | VOID *FilePathUriParser;
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219 |
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220 | //
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221 | // Cached HTTP data
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222 | //
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223 | LIST_ENTRY CacheList;
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224 |
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225 | //
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226 | // Cached DHCP offer
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227 | //
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228 | // OfferIndex records the index of DhcpOffer[] buffer, and OfferCount records the num of each type of offer.
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229 | //
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230 | // It supposed that
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231 | //
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232 | // OfferNum: 8
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233 | // OfferBuffer: [ProxyNameUri, DhcpNameUri, DhcpIpUri, ProxyNameUri, ProxyIpUri, DhcpOnly, DhcpIpUri, DhcpNameUriDns]
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234 | // (OfferBuffer is 0-based.)
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235 | //
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236 | // And assume that (DhcpIpUri is the first priority actually.)
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237 | //
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238 | // SelectIndex: 5
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239 | // SelectProxyType: HttpOfferTypeProxyIpUri
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240 | // (SelectIndex is 1-based, and 0 means no one is selected.)
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241 | //
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242 | // So it should be
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243 | //
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244 | // DhcpIpUri DhcpNameUriDns DhcpDns DhcpOnly ProxyNameUri ProxyIpUri DhcpNameUri
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245 | // OfferCount: [ 2, 1, 0, 1, 2, 1, 1]
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246 | //
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247 | // OfferIndex: {[ 2, 7, 0, 5, 0, *4, 1]
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248 | // [ 6, 0, 0, 0, 3, 0, 0]
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249 | // [ 0, 0, 0, 0, 0, 0, 0]
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250 | // ... ]}
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251 | // (OfferIndex is 0-based.)
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252 | //
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253 | //
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254 | UINT32 SelectIndex;
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255 | UINT32 SelectProxyType;
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256 | HTTP_BOOT_DHCP_PACKET_CACHE OfferBuffer[HTTP_BOOT_OFFER_MAX_NUM];
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257 | UINT32 OfferNum;
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258 | UINT32 OfferCount[HttpOfferTypeMax];
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259 | UINT32 OfferIndex[HttpOfferTypeMax][HTTP_BOOT_OFFER_MAX_NUM];
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260 | };
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261 |
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262 | #define HTTP_BOOT_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('H', 'B', 'P', 'D')
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263 | #define HTTP_BOOT_VIRTUAL_NIC_SIGNATURE SIGNATURE_32 ('H', 'B', 'V', 'N')
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264 | #define HTTP_BOOT_PRIVATE_DATA_FROM_LOADFILE(a) CR (a, HTTP_BOOT_PRIVATE_DATA, LoadFile, HTTP_BOOT_PRIVATE_DATA_SIGNATURE)
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265 | #define HTTP_BOOT_PRIVATE_DATA_FROM_ID(a) CR (a, HTTP_BOOT_PRIVATE_DATA, Id, HTTP_BOOT_PRIVATE_DATA_SIGNATURE)
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266 | #define HTTP_BOOT_VIRTUAL_NIC_FROM_LOADFILE(a) CR (a, HTTP_BOOT_VIRTUAL_NIC, LoadFile, HTTP_BOOT_VIRTUAL_NIC_SIGNATURE)
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267 | extern EFI_LOAD_FILE_PROTOCOL gHttpBootDxeLoadFile;
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268 |
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269 | /**
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270 | Tests to see if this driver supports a given controller. If a child device is provided,
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271 | it further tests to see if this driver supports creating a handle for the specified child device.
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272 |
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273 | This function checks to see if the driver specified by This supports the device specified by
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274 | ControllerHandle. Drivers will typically use the device path attached to
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275 | ControllerHandle and/or the services from the bus I/O abstraction attached to
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276 | ControllerHandle to determine if the driver supports ControllerHandle. This function
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277 | may be called many times during platform initialization. In order to reduce boot times, the tests
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278 | performed by this function must be very small, and take as little time as possible to execute. This
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279 | function must not change the state of any hardware devices, and this function must be aware that the
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280 | device specified by ControllerHandle may already be managed by the same driver or a
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281 | different driver. This function must match its calls to AllocatePages() with FreePages(),
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282 | AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
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283 | Because ControllerHandle may have been previously started by the same driver, if a protocol is
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284 | already in the opened state, then it must not be closed with CloseProtocol(). This is required
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285 | to guarantee the state of ControllerHandle is not modified by this function.
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286 |
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287 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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288 | @param[in] ControllerHandle The handle of the controller to test. This handle
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289 | must support a protocol interface that supplies
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290 | an I/O abstraction to the driver.
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291 | @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
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292 | parameter is ignored by device drivers, and is optional for bus
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293 | drivers. For bus drivers, if this parameter is not NULL, then
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294 | the bus driver must determine if the bus controller specified
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295 | by ControllerHandle and the child controller specified
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296 | by RemainingDevicePath are both supported by this
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297 | bus driver.
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298 |
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299 | @retval EFI_SUCCESS The device specified by ControllerHandle and
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300 | RemainingDevicePath is supported by the driver specified by This.
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301 | @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
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302 | RemainingDevicePath is already being managed by the driver
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303 | specified by This.
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304 | @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
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305 | RemainingDevicePath is already being managed by a different
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306 | driver or an application that requires exclusive access.
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307 | Currently not implemented.
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308 | @retval EFI_UNSUPPORTED The device specified by ControllerHandle and
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309 | RemainingDevicePath is not supported by the driver specified by This.
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310 | **/
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311 | EFI_STATUS
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312 | EFIAPI
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313 | HttpBootIp4DxeDriverBindingSupported (
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314 | IN EFI_DRIVER_BINDING_PROTOCOL *This,
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315 | IN EFI_HANDLE ControllerHandle,
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316 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
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317 | );
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318 |
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319 | /**
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320 | Starts a device controller or a bus controller.
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321 |
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322 | The Start() function is designed to be invoked from the EFI boot service ConnectController().
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323 | As a result, much of the error checking on the parameters to Start() has been moved into this
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324 | common boot service. It is legal to call Start() from other locations,
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325 | but the following calling restrictions must be followed, or the system behavior will not be deterministic.
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326 | 1. ControllerHandle must be a valid EFI_HANDLE.
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327 | 2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
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328 | EFI_DEVICE_PATH_PROTOCOL.
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329 | 3. Prior to calling Start(), the Supported() function for the driver specified by This must
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330 | have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
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331 |
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332 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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333 | @param[in] ControllerHandle The handle of the controller to start. This handle
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334 | must support a protocol interface that supplies
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335 | an I/O abstraction to the driver.
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336 | @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
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337 | parameter is ignored by device drivers, and is optional for bus
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338 | drivers. For a bus driver, if this parameter is NULL, then handles
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339 | for all the children of Controller are created by this driver.
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340 | If this parameter is not NULL and the first Device Path Node is
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341 | not the End of Device Path Node, then only the handle for the
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342 | child device specified by the first Device Path Node of
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343 | RemainingDevicePath is created by this driver.
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344 | If the first Device Path Node of RemainingDevicePath is
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345 | the End of Device Path Node, no child handle is created by this
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346 | driver.
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347 |
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348 | @retval EFI_SUCCESS The device was started.
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349 | @retval EFI_DEVICE_ERROR The device could not be started due to a device error.Currently not implemented.
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350 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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351 | @retval Others The driver failded to start the device.
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352 |
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353 | **/
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354 | EFI_STATUS
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355 | EFIAPI
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356 | HttpBootIp4DxeDriverBindingStart (
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357 | IN EFI_DRIVER_BINDING_PROTOCOL *This,
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358 | IN EFI_HANDLE ControllerHandle,
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359 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
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360 | );
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361 |
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362 | /**
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363 | Stops a device controller or a bus controller.
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364 |
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365 | The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
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366 | As a result, much of the error checking on the parameters to Stop() has been moved
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367 | into this common boot service. It is legal to call Stop() from other locations,
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368 | but the following calling restrictions must be followed, or the system behavior will not be deterministic.
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369 | 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
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370 | same driver's Start() function.
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371 | 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
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372 | EFI_HANDLE. In addition, all of these handles must have been created in this driver's
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373 | Start() function, and the Start() function must have called OpenProtocol() on
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374 | ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
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375 |
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376 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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377 | @param[in] ControllerHandle A handle to the device being stopped. The handle must
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378 | support a bus specific I/O protocol for the driver
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379 | to use to stop the device.
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380 | @param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.
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381 | @param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
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382 | if NumberOfChildren is 0.
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383 |
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384 | @retval EFI_SUCCESS The device was stopped.
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385 | @retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
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386 |
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387 | **/
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388 | EFI_STATUS
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389 | EFIAPI
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390 | HttpBootIp4DxeDriverBindingStop (
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391 | IN EFI_DRIVER_BINDING_PROTOCOL *This,
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392 | IN EFI_HANDLE ControllerHandle,
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393 | IN UINTN NumberOfChildren,
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394 | IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
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395 | );
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396 |
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397 | /**
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398 | Tests to see if this driver supports a given controller. If a child device is provided,
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399 | it further tests to see if this driver supports creating a handle for the specified child device.
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400 |
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401 | This function checks to see if the driver specified by This supports the device specified by
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402 | ControllerHandle. Drivers will typically use the device path attached to
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403 | ControllerHandle and/or the services from the bus I/O abstraction attached to
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404 | ControllerHandle to determine if the driver supports ControllerHandle. This function
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405 | may be called many times during platform initialization. In order to reduce boot times, the tests
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406 | performed by this function must be very small, and take as little time as possible to execute. This
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407 | function must not change the state of any hardware devices, and this function must be aware that the
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408 | device specified by ControllerHandle may already be managed by the same driver or a
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409 | different driver. This function must match its calls to AllocatePages() with FreePages(),
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410 | AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
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411 | Because ControllerHandle may have been previously started by the same driver, if a protocol is
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412 | already in the opened state, then it must not be closed with CloseProtocol(). This is required
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413 | to guarantee the state of ControllerHandle is not modified by this function.
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414 |
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415 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
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416 | @param[in] ControllerHandle The handle of the controller to test. This handle
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417 | must support a protocol interface that supplies
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418 | an I/O abstraction to the driver.
|
---|
419 | @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
|
---|
420 | parameter is ignored by device drivers, and is optional for bus
|
---|
421 | drivers. For bus drivers, if this parameter is not NULL, then
|
---|
422 | the bus driver must determine if the bus controller specified
|
---|
423 | by ControllerHandle and the child controller specified
|
---|
424 | by RemainingDevicePath are both supported by this
|
---|
425 | bus driver.
|
---|
426 |
|
---|
427 | @retval EFI_SUCCESS The device specified by ControllerHandle and
|
---|
428 | RemainingDevicePath is supported by the driver specified by This.
|
---|
429 | @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
|
---|
430 | RemainingDevicePath is already being managed by the driver
|
---|
431 | specified by This.
|
---|
432 | @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
|
---|
433 | RemainingDevicePath is already being managed by a different
|
---|
434 | driver or an application that requires exclusive access.
|
---|
435 | Currently not implemented.
|
---|
436 | @retval EFI_UNSUPPORTED The device specified by ControllerHandle and
|
---|
437 | RemainingDevicePath is not supported by the driver specified by This.
|
---|
438 | **/
|
---|
439 | EFI_STATUS
|
---|
440 | EFIAPI
|
---|
441 | HttpBootIp6DxeDriverBindingSupported (
|
---|
442 | IN EFI_DRIVER_BINDING_PROTOCOL *This,
|
---|
443 | IN EFI_HANDLE ControllerHandle,
|
---|
444 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
|
---|
445 | );
|
---|
446 |
|
---|
447 | /**
|
---|
448 | Starts a device controller or a bus controller.
|
---|
449 |
|
---|
450 | The Start() function is designed to be invoked from the EFI boot service ConnectController().
|
---|
451 | As a result, much of the error checking on the parameters to Start() has been moved into this
|
---|
452 | common boot service. It is legal to call Start() from other locations,
|
---|
453 | but the following calling restrictions must be followed, or the system behavior will not be deterministic.
|
---|
454 | 1. ControllerHandle must be a valid EFI_HANDLE.
|
---|
455 | 2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
|
---|
456 | EFI_DEVICE_PATH_PROTOCOL.
|
---|
457 | 3. Prior to calling Start(), the Supported() function for the driver specified by This must
|
---|
458 | have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
|
---|
459 |
|
---|
460 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
|
---|
461 | @param[in] ControllerHandle The handle of the controller to start. This handle
|
---|
462 | must support a protocol interface that supplies
|
---|
463 | an I/O abstraction to the driver.
|
---|
464 | @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This
|
---|
465 | parameter is ignored by device drivers, and is optional for bus
|
---|
466 | drivers. For a bus driver, if this parameter is NULL, then handles
|
---|
467 | for all the children of Controller are created by this driver.
|
---|
468 | If this parameter is not NULL and the first Device Path Node is
|
---|
469 | not the End of Device Path Node, then only the handle for the
|
---|
470 | child device specified by the first Device Path Node of
|
---|
471 | RemainingDevicePath is created by this driver.
|
---|
472 | If the first Device Path Node of RemainingDevicePath is
|
---|
473 | the End of Device Path Node, no child handle is created by this
|
---|
474 | driver.
|
---|
475 |
|
---|
476 | @retval EFI_SUCCESS The device was started.
|
---|
477 | @retval EFI_DEVICE_ERROR The device could not be started due to a device error.Currently not implemented.
|
---|
478 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
|
---|
479 | @retval Others The driver failded to start the device.
|
---|
480 |
|
---|
481 | **/
|
---|
482 | EFI_STATUS
|
---|
483 | EFIAPI
|
---|
484 | HttpBootIp6DxeDriverBindingStart (
|
---|
485 | IN EFI_DRIVER_BINDING_PROTOCOL *This,
|
---|
486 | IN EFI_HANDLE ControllerHandle,
|
---|
487 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
|
---|
488 | );
|
---|
489 |
|
---|
490 | /**
|
---|
491 | Stops a device controller or a bus controller.
|
---|
492 |
|
---|
493 | The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
|
---|
494 | As a result, much of the error checking on the parameters to Stop() has been moved
|
---|
495 | into this common boot service. It is legal to call Stop() from other locations,
|
---|
496 | but the following calling restrictions must be followed, or the system behavior will not be deterministic.
|
---|
497 | 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
|
---|
498 | same driver's Start() function.
|
---|
499 | 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
|
---|
500 | EFI_HANDLE. In addition, all of these handles must have been created in this driver's
|
---|
501 | Start() function, and the Start() function must have called OpenProtocol() on
|
---|
502 | ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
|
---|
503 |
|
---|
504 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
|
---|
505 | @param[in] ControllerHandle A handle to the device being stopped. The handle must
|
---|
506 | support a bus specific I/O protocol for the driver
|
---|
507 | to use to stop the device.
|
---|
508 | @param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.
|
---|
509 | @param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
|
---|
510 | if NumberOfChildren is 0.
|
---|
511 |
|
---|
512 | @retval EFI_SUCCESS The device was stopped.
|
---|
513 | @retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.
|
---|
514 |
|
---|
515 | **/
|
---|
516 | EFI_STATUS
|
---|
517 | EFIAPI
|
---|
518 | HttpBootIp6DxeDriverBindingStop (
|
---|
519 | IN EFI_DRIVER_BINDING_PROTOCOL *This,
|
---|
520 | IN EFI_HANDLE ControllerHandle,
|
---|
521 | IN UINTN NumberOfChildren,
|
---|
522 | IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
|
---|
523 | );
|
---|
524 | #endif
|
---|