1 | /* $Id: UsbTestServiceGadgetClassTest.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
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2 | /** @file
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3 | * UsbTestServ - Remote USB test configuration and execution server, USB gadget class
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4 | * for the test device.
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5 | */
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6 |
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7 | /*
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8 | * Copyright (C) 2016-2022 Oracle Corporation
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9 | *
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10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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11 | * available from http://www.virtualbox.org. This file is free software;
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12 | * you can redistribute it and/or modify it under the terms of the GNU
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13 | * General Public License (GPL) as published by the Free Software
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14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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17 | *
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18 | * The contents of this file may alternatively be used under the terms
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19 | * of the Common Development and Distribution License Version 1.0
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20 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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21 | * VirtualBox OSE distribution, in which case the provisions of the
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22 | * CDDL are applicable instead of those of the GPL.
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23 | *
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24 | * You may elect to license modified versions of this file under the
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25 | * terms and conditions of either the GPL or the CDDL or both.
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26 | */
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27 |
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28 |
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29 | /*********************************************************************************************************************************
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30 | * Header Files *
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31 | *********************************************************************************************************************************/
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32 | #include <iprt/asm.h>
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33 | #include <iprt/ctype.h>
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34 | #include <iprt/dir.h>
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35 | #include <iprt/err.h>
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36 | #include <iprt/env.h>
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37 | #include <iprt/mem.h>
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38 | #include <iprt/path.h>
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39 | #include <iprt/process.h>
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40 | #include <iprt/string.h>
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41 | #include <iprt/symlink.h>
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42 | #include <iprt/thread.h>
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43 |
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44 | #include <iprt/linux/sysfs.h>
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45 |
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46 | #include "UsbTestServiceGadgetInternal.h"
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47 | #include "UsbTestServicePlatform.h"
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48 |
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49 |
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50 | /*********************************************************************************************************************************
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51 | * Constants And Macros, Structures and Typedefs *
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52 | *********************************************************************************************************************************/
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53 |
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54 | /** Default configfs mount point. */
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55 | #define UTS_GADGET_CLASS_CONFIGFS_MNT_DEF "/sys/kernel/config/usb_gadget"
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56 | /** Gadget template name */
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57 | #define UTS_GADGET_TEMPLATE_NAME "gadget_test"
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58 |
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59 | /** Default vendor ID which is recognized by the usbtest driver. */
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60 | #define UTS_GADGET_TEST_VENDOR_ID_DEF UINT16_C(0x0525)
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61 | /** Default product ID which is recognized by the usbtest driver. */
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62 | #define UTS_GADGET_TEST_PRODUCT_ID_DEF UINT16_C(0xa4a0)
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63 | /** Default device class. */
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64 | #define UTS_GADGET_TEST_DEVICE_CLASS_DEF UINT8_C(0xff)
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65 | /** Default serial number string. */
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66 | #define UTS_GADGET_TEST_SERIALNUMBER_DEF "0123456789"
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67 | /** Default manufacturer string. */
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68 | #define UTS_GADGET_TEST_MANUFACTURER_DEF "Oracle Inc."
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69 | /** Default product string. */
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70 | #define UTS_GADGET_TEST_PRODUCT_DEF "USB test device"
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71 |
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72 | /**
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73 | * Internal UTS gadget host instance data.
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74 | */
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75 | typedef struct UTSGADGETCLASSINT
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76 | {
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77 | /** Gadget template path. */
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78 | char *pszGadgetPath;
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79 | /** The UDC this gadget is connected to. */
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80 | char *pszUdc;
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81 | /** Bus identifier for the used UDC. */
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82 | uint32_t uBusId;
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83 | /** Device identifier. */
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84 | uint32_t uDevId;
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85 | } UTSGADGETCLASSINT;
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86 |
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87 |
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88 | /*********************************************************************************************************************************
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89 | * Global Variables *
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90 | *********************************************************************************************************************************/
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91 |
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92 | /** Number of already created gadgets, used for the template name. */
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93 | static volatile uint32_t g_cGadgets = 0;
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94 |
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95 |
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96 | /*********************************************************************************************************************************
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97 | * Internal Functions *
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98 | *********************************************************************************************************************************/
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99 |
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100 | /**
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101 | * Creates a new directory pointed to by the given format string.
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102 | *
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103 | * @returns IPRT status code.
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104 | * @param pszFormat The format string.
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105 | * @param va The arguments.
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106 | */
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107 | static int utsGadgetClassTestDirCreateV(const char *pszFormat, va_list va)
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108 | {
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109 | int rc = VINF_SUCCESS;
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110 | char aszPath[RTPATH_MAX + 1];
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111 |
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112 | size_t cbStr = RTStrPrintfV(&aszPath[0], sizeof(aszPath), pszFormat, va);
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113 | if (cbStr <= sizeof(aszPath) - 1)
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114 | rc = RTDirCreateFullPath(aszPath, 0700);
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115 | else
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116 | rc = VERR_BUFFER_OVERFLOW;
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117 |
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118 | return rc;
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119 | }
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120 |
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121 |
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122 | /**
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123 | * Creates a new directory pointed to by the given format string.
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124 | *
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125 | * @returns IPRT status code.
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126 | * @param pszFormat The format string.
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127 | * @param ... The arguments.
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128 | */
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129 | static int utsGadgetClassTestDirCreate(const char *pszFormat, ...)
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130 | {
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131 | va_list va;
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132 | va_start(va, pszFormat);
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133 | int rc = utsGadgetClassTestDirCreateV(pszFormat, va);
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134 | va_end(va);
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135 | return rc;
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136 | }
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137 |
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138 |
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139 | /**
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140 | * Removes a directory pointed to by the given format string.
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141 | *
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142 | * @returns IPRT status code.
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143 | * @param pszFormat The format string.
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144 | * @param va The arguments.
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145 | */
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146 | static int utsGadgetClassTestDirRemoveV(const char *pszFormat, va_list va)
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147 | {
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148 | int rc = VINF_SUCCESS;
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149 | char aszPath[RTPATH_MAX + 1];
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150 |
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151 | size_t cbStr = RTStrPrintfV(&aszPath[0], sizeof(aszPath), pszFormat, va);
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152 | if (cbStr <= sizeof(aszPath) - 1)
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153 | rc = RTDirRemove(aszPath);
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154 | else
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155 | rc = VERR_BUFFER_OVERFLOW;
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156 |
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157 | return rc;
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158 | }
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159 |
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160 |
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161 | /**
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162 | * Removes a directory pointed to by the given format string.
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163 | *
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164 | * @returns IPRT status code.
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165 | * @param pszFormat The format string.
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166 | * @param ... The arguments.
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167 | */
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168 | static int utsGadgetClassTestDirRemove(const char *pszFormat, ...)
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169 | {
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170 | va_list va;
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171 | va_start(va, pszFormat);
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172 | int rc = utsGadgetClassTestDirRemoveV(pszFormat, va);
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173 | va_end(va);
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174 | return rc;
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175 | }
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176 |
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177 |
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178 | /**
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179 | * Links the given function to the given config.
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180 | *
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181 | * @returns IPRT status code.
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182 | * @param pClass The gadget class instance data.
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183 | * @param pszFunc The function to link.
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184 | * @param pszCfg The configuration which the function will be part of.
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185 | */
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186 | static int utsGadgetClassTestLinkFuncToCfg(PUTSGADGETCLASSINT pClass, const char *pszFunc, const char *pszCfg)
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187 | {
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188 | int rc = VINF_SUCCESS;
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189 | char aszPathFunc[RTPATH_MAX + 1];
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190 | char aszPathCfg[RTPATH_MAX + 1];
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191 |
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192 | size_t cbStr = RTStrPrintf(&aszPathFunc[0], sizeof(aszPathFunc), "%s/functions/%s",
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193 | pClass->pszGadgetPath, pszFunc);
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194 | if (cbStr <= sizeof(aszPathFunc) - 1)
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195 | {
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196 | cbStr = RTStrPrintf(&aszPathCfg[0], sizeof(aszPathCfg), "%s/configs/%s/%s",
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197 | pClass->pszGadgetPath, pszCfg, pszFunc);
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198 | if (cbStr <= sizeof(aszPathCfg) - 1)
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199 | rc = RTSymlinkCreate(&aszPathCfg[0], &aszPathFunc[0], RTSYMLINKTYPE_DIR, 0);
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200 | else
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201 | rc = VERR_BUFFER_OVERFLOW;
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202 | }
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203 | else
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204 | rc = VERR_BUFFER_OVERFLOW;
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205 |
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206 | return rc;
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207 | }
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208 |
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209 |
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210 | /**
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211 | * Unlinks the given function from the given configuration.
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212 | *
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213 | * @returns IPRT status code.
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214 | * @param pClass The gadget class instance data.
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215 | * @param pszFunc The function to unlink.
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216 | * @param pszCfg The configuration which the function is currently part of.
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217 | */
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218 | static int utsGadgetClassTestUnlinkFuncFromCfg(PUTSGADGETCLASSINT pClass, const char *pszFunc, const char *pszCfg)
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219 | {
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220 | int rc = VINF_SUCCESS;
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221 | char aszPath[RTPATH_MAX + 1];
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222 | size_t cbStr = RTStrPrintf(&aszPath[0], sizeof(aszPath), "%s/configs/%s/%s",
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223 | pClass->pszGadgetPath, pszCfg, pszFunc);
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224 | if (cbStr <= sizeof(aszPath) - 1)
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225 | rc = RTSymlinkDelete(&aszPath[0], 0);
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226 | else
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227 | rc = VERR_BUFFER_OVERFLOW;
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228 |
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229 | return rc;
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230 | }
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231 |
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232 |
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233 | /**
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234 | * Cleans up any leftover configurations from the gadget class.
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235 | *
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236 | * @returns nothing.
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237 | * @param pClass The gadget class instance data.
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238 | */
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239 | static void utsGadgetClassTestCleanup(PUTSGADGETCLASSINT pClass)
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240 | {
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241 | /* Unbind the gadget from the currently assigned UDC first. */
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242 | int rc = RTLinuxSysFsWriteStrFile("", 0, NULL, "%s/UDC", pClass->pszGadgetPath);
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243 | AssertRC(rc);
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244 |
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245 | /* Delete the symlinks, ignore any errors. */
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246 | utsGadgetClassTestUnlinkFuncFromCfg(pClass, "Loopback.0", "c.2");
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247 | utsGadgetClassTestUnlinkFuncFromCfg(pClass, "SourceSink.0", "c.1");
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248 |
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249 | /* Delete configuration strings and then the configuration directories. */
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250 | utsGadgetClassTestDirRemove("%s/configs/c.2/strings/0x409", pClass->pszGadgetPath);
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251 | utsGadgetClassTestDirRemove("%s/configs/c.1/strings/0x409", pClass->pszGadgetPath);
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252 |
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253 | utsGadgetClassTestDirRemove("%s/configs/c.2", pClass->pszGadgetPath);
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254 | utsGadgetClassTestDirRemove("%s/configs/c.1", pClass->pszGadgetPath);
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255 |
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256 | /* Delete the functions. */
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257 | utsGadgetClassTestDirRemove("%s/functions/Loopback.0", pClass->pszGadgetPath);
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258 | utsGadgetClassTestDirRemove("%s/functions/SourceSink.0", pClass->pszGadgetPath);
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259 |
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260 | /* Delete the english strings. */
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261 | utsGadgetClassTestDirRemove("%s/strings/0x409", pClass->pszGadgetPath);
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262 |
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263 | /* Finally delete the gadget template. */
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264 | utsGadgetClassTestDirRemove(pClass->pszGadgetPath);
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265 |
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266 | /* Release the UDC. */
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267 | if (pClass->pszUdc)
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268 | {
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269 | rc = utsPlatformLnxReleaseUDC(pClass->pszUdc);
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270 | AssertRC(rc);
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271 | RTStrFree(pClass->pszUdc);
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272 | }
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273 | }
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274 |
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275 | /**
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276 | * @interface_method_impl{UTSGADGETCLASSIF,pfnInit}
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277 | */
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278 | static DECLCALLBACK(int) utsGadgetClassTestInit(PUTSGADGETCLASSINT pClass, PCUTSGADGETCFGITEM paCfg)
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279 | {
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280 | int rc = VINF_SUCCESS;
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281 |
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282 | if (RTLinuxSysFsExists(UTS_GADGET_CLASS_CONFIGFS_MNT_DEF))
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283 | {
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284 | /* Create the gadget template */
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285 | unsigned idx = ASMAtomicIncU32(&g_cGadgets);
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286 |
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287 | int rcStr = RTStrAPrintf(&pClass->pszGadgetPath, "%s/%s%u", UTS_GADGET_CLASS_CONFIGFS_MNT_DEF,
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288 | UTS_GADGET_TEMPLATE_NAME, idx);
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289 | if (rcStr == -1)
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290 | return VERR_NO_STR_MEMORY;
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291 |
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292 | rc = utsGadgetClassTestDirCreate(pClass->pszGadgetPath);
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293 | if (RT_SUCCESS(rc))
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294 | {
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295 | uint16_t idVendor = 0;
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296 | uint16_t idProduct = 0;
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297 | uint8_t bDeviceClass = 0;
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298 | char *pszSerial = NULL;
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299 | char *pszManufacturer = NULL;
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300 | char *pszProduct = NULL;
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301 | bool fSuperSpeed = false;
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302 |
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303 | /* Get basic device config. */
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304 | rc = utsGadgetCfgQueryU16Def(paCfg, "Gadget/idVendor", &idVendor, UTS_GADGET_TEST_VENDOR_ID_DEF);
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305 | if (RT_SUCCESS(rc))
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306 | rc = utsGadgetCfgQueryU16Def(paCfg, "Gadget/idProduct", &idProduct, UTS_GADGET_TEST_PRODUCT_ID_DEF);
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307 | if (RT_SUCCESS(rc))
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308 | rc = utsGadgetCfgQueryU8Def(paCfg, "Gadget/bDeviceClass", &bDeviceClass, UTS_GADGET_TEST_DEVICE_CLASS_DEF);
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309 | if (RT_SUCCESS(rc))
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310 | rc = utsGadgetCfgQueryStringDef(paCfg, "Gadget/SerialNumber", &pszSerial, UTS_GADGET_TEST_SERIALNUMBER_DEF);
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311 | if (RT_SUCCESS(rc))
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312 | rc = utsGadgetCfgQueryStringDef(paCfg, "Gadget/Manufacturer", &pszManufacturer, UTS_GADGET_TEST_MANUFACTURER_DEF);
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313 | if (RT_SUCCESS(rc))
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314 | rc = utsGadgetCfgQueryStringDef(paCfg, "Gadget/Product", &pszProduct, UTS_GADGET_TEST_PRODUCT_DEF);
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315 | if (RT_SUCCESS(rc))
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316 | rc = utsGadgetCfgQueryBoolDef(paCfg, "Gadget/SuperSpeed", &fSuperSpeed, false);
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317 |
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318 | if (RT_SUCCESS(rc))
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319 | {
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320 | /* Write basic attributes. */
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321 | rc = RTLinuxSysFsWriteU16File(16, idVendor, "%s/idVendor", pClass->pszGadgetPath);
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322 | if (RT_SUCCESS(rc))
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323 | rc = RTLinuxSysFsWriteU16File(16, idProduct, "%s/idProduct", pClass->pszGadgetPath);
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324 | if (RT_SUCCESS(rc))
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325 | rc = RTLinuxSysFsWriteU16File(16, bDeviceClass, "%s/bDeviceClass", pClass->pszGadgetPath);
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326 |
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327 | /* Create english language strings. */
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328 | if (RT_SUCCESS(rc))
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329 | rc = utsGadgetClassTestDirCreate("%s/strings/0x409", pClass->pszGadgetPath);
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330 | if (RT_SUCCESS(rc))
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331 | rc = RTLinuxSysFsWriteStrFile(pszSerial, 0, NULL, "%s/strings/0x409/serialnumber", pClass->pszGadgetPath);
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332 | if (RT_SUCCESS(rc))
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333 | rc = RTLinuxSysFsWriteStrFile(pszManufacturer, 0, NULL, "%s/strings/0x409/manufacturer", pClass->pszGadgetPath);
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334 | if (RT_SUCCESS(rc))
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335 | rc = RTLinuxSysFsWriteStrFile(pszProduct, 0, NULL, "%s/strings/0x409/product", pClass->pszGadgetPath);
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336 |
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337 | /* Create the gadget functions. */
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338 | if (RT_SUCCESS(rc))
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339 | rc = utsGadgetClassTestDirCreate("%s/functions/SourceSink.0", pClass->pszGadgetPath);
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340 | if (RT_SUCCESS(rc))
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341 | rc = utsGadgetClassTestDirCreate("%s/functions/Loopback.0", pClass->pszGadgetPath);
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342 |
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343 | /* Create the device configs. */
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344 | if (RT_SUCCESS(rc))
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345 | rc = utsGadgetClassTestDirCreate("%s/configs/c.1", pClass->pszGadgetPath);
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346 | if (RT_SUCCESS(rc))
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347 | rc = utsGadgetClassTestDirCreate("%s/configs/c.2", pClass->pszGadgetPath);
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348 |
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349 | /* Write configuration strings. */
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350 | if (RT_SUCCESS(rc))
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351 | rc = utsGadgetClassTestDirCreate("%s/configs/c.1/strings/0x409", pClass->pszGadgetPath);
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352 | if (RT_SUCCESS(rc))
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353 | rc = utsGadgetClassTestDirCreate("%s/configs/c.2/strings/0x409", pClass->pszGadgetPath);
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354 | if (RT_SUCCESS(rc))
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355 | rc = RTLinuxSysFsWriteStrFile("source and sink data", 0, NULL, "%s/configs/c.1/strings/0x409/configuration", pClass->pszGadgetPath);
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356 | if (RT_SUCCESS(rc))
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357 | rc = RTLinuxSysFsWriteStrFile("loop input to output", 0, NULL, "%s/configs/c.2/strings/0x409/configuration", pClass->pszGadgetPath);
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358 |
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359 | /* Link the functions into the configurations. */
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360 | if (RT_SUCCESS(rc))
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361 | rc = utsGadgetClassTestLinkFuncToCfg(pClass, "SourceSink.0", "c.1");
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362 | if (RT_SUCCESS(rc))
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363 | rc = utsGadgetClassTestLinkFuncToCfg(pClass, "Loopback.0", "c.2");
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364 |
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365 | /* Finally enable the gadget by attaching it to a UDC. */
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366 | if (RT_SUCCESS(rc))
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367 | {
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368 | pClass->pszUdc = NULL;
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369 |
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370 | rc = utsPlatformLnxAcquireUDC(fSuperSpeed, &pClass->pszUdc, &pClass->uBusId);
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371 | if (RT_SUCCESS(rc))
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372 | rc = RTLinuxSysFsWriteStrFile(pClass->pszUdc, 0, NULL, "%s/UDC", pClass->pszGadgetPath);
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373 | if (RT_SUCCESS(rc))
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374 | RTThreadSleep(500); /* Fudge: Sleep a bit to give the device a chance to appear on the host so binding succeeds. */
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375 | }
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376 | }
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377 |
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378 | if (pszSerial)
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379 | RTStrFree(pszSerial);
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380 | if (pszManufacturer)
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381 | RTStrFree(pszManufacturer);
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382 | if (pszProduct)
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383 | RTStrFree(pszProduct);
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384 | }
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385 | }
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386 | else
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387 | rc = VERR_NOT_FOUND;
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388 |
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389 | if (RT_FAILURE(rc))
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390 | utsGadgetClassTestCleanup(pClass);
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391 |
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392 | return rc;
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393 | }
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394 |
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395 |
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396 | /**
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397 | * @interface_method_impl{UTSGADGETCLASSIF,pfnTerm}
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398 | */
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399 | static DECLCALLBACK(void) utsGadgetClassTestTerm(PUTSGADGETCLASSINT pClass)
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400 | {
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401 | utsGadgetClassTestCleanup(pClass);
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402 |
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403 | if (pClass->pszGadgetPath)
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404 | RTStrFree(pClass->pszGadgetPath);
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405 | }
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406 |
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407 |
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408 | /**
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409 | * @interface_method_impl{UTSGADGETCLASSIF,pfnGetBusId}
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410 | */
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411 | static DECLCALLBACK(uint32_t) utsGadgetClassTestGetBusId(PUTSGADGETCLASSINT pClass)
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412 | {
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413 | return pClass->uBusId;
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414 | }
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415 |
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416 |
|
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417 | /**
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418 | * @interface_method_impl{UTSGADGETCLASSIF,pfnConnect}
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419 | */
|
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420 | static DECLCALLBACK(int) utsGadgetClassTestConnect(PUTSGADGETCLASSINT pClass)
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421 | {
|
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422 | int rc = RTLinuxSysFsWriteStrFile("connect", 0, NULL, "/sys/class/udc/%s/soft_connect", pClass->pszUdc);
|
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423 | if (RT_SUCCESS(rc))
|
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424 | RTThreadSleep(500); /* Fudge: Sleep a bit to give the device a chance to appear on the host so binding succeeds. */
|
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425 |
|
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426 | return rc;
|
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427 | }
|
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428 |
|
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429 |
|
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430 | /**
|
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431 | * @interface_method_impl{UTSGADGETCLASSIF,pfnDisconnect}
|
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432 | */
|
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433 | static DECLCALLBACK(int) utsGadgetClassTestDisconnect(PUTSGADGETCLASSINT pClass)
|
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434 | {
|
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435 | return RTLinuxSysFsWriteStrFile("disconnect", 0, NULL, "/sys/class/udc/%s/soft_connect", pClass->pszUdc);}
|
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436 |
|
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437 |
|
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438 |
|
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439 | /**
|
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440 | * The gadget host interface callback table.
|
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441 | */
|
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442 | const UTSGADGETCLASSIF g_UtsGadgetClassTest =
|
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443 | {
|
---|
444 | /** enmType */
|
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445 | UTSGADGETCLASS_TEST,
|
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446 | /** pszDesc */
|
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447 | "UTS test device gadget class",
|
---|
448 | /** cbIf */
|
---|
449 | sizeof(UTSGADGETCLASSINT),
|
---|
450 | /** pfnInit */
|
---|
451 | utsGadgetClassTestInit,
|
---|
452 | /** pfnTerm */
|
---|
453 | utsGadgetClassTestTerm,
|
---|
454 | /** pfnGetBusId */
|
---|
455 | utsGadgetClassTestGetBusId,
|
---|
456 | /** pfnConnect */
|
---|
457 | utsGadgetClassTestConnect,
|
---|
458 | /** pfnDisconnect. */
|
---|
459 | utsGadgetClassTestDisconnect
|
---|
460 | };
|
---|
461 |
|
---|