1 | /* $Id: USBFilter.cpp 69500 2017-10-28 15:14:05Z vboxsync $ */
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2 | /** @file
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3 | * VirtualBox USB filter abstraction.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2007-2017 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * The contents of this file may alternatively be used under the terms
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18 | * of the Common Development and Distribution License Version 1.0
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19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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20 | * VirtualBox OSE distribution, in which case the provisions of the
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21 | * CDDL are applicable instead of those of the GPL.
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22 | *
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23 | * You may elect to license modified versions of this file under the
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24 | * terms and conditions of either the GPL or the CDDL or both.
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25 | */
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26 |
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27 |
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28 | /*********************************************************************************************************************************
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29 | * Header Files *
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30 | *********************************************************************************************************************************/
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31 | #include <VBox/usbfilter.h>
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32 | #include <VBox/usblib.h>
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33 | #include <VBox/err.h>
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34 | #include <VBox/log.h>
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35 | #include <iprt/string.h>
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36 | #include <iprt/assert.h>
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37 | #include <iprt/ctype.h>
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38 |
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39 |
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40 | /** @todo split this up for the sake of device drivers and such. */
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41 |
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42 |
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43 | /**
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44 | * Initializes an USBFILTER structure.
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45 | *
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46 | * @param pFilter The filter to initialize.
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47 | * @param enmType The filter type. If not valid, the filter will not
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48 | * be properly initialized and all other calls will fail.
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49 | */
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50 | USBLIB_DECL(void) USBFilterInit(PUSBFILTER pFilter, USBFILTERTYPE enmType)
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51 | {
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52 | memset(pFilter, 0, sizeof(*pFilter));
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53 | AssertReturnVoid(enmType > USBFILTERTYPE_INVALID && enmType < USBFILTERTYPE_END);
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54 | pFilter->u32Magic = USBFILTER_MAGIC;
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55 | pFilter->enmType = enmType;
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56 | for (unsigned i = 0; i < RT_ELEMENTS(pFilter->aFields); i++)
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57 | pFilter->aFields[i].enmMatch = USBFILTERMATCH_IGNORE;
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58 | }
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59 |
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60 |
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61 | /**
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62 | * Make a clone of the specified filter.
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63 | *
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64 | * @param pFilter The target filter.
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65 | * @param pToClone The source filter.
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66 | */
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67 | USBLIB_DECL(void) USBFilterClone(PUSBFILTER pFilter, PCUSBFILTER pToClone)
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68 | {
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69 | memcpy(pFilter, pToClone, sizeof(*pToClone));
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70 | }
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71 |
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72 |
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73 | /**
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74 | * Deletes (invalidates) an USBFILTER structure.
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75 | *
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76 | * @param pFilter The filter to delete.
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77 | */
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78 | USBLIB_DECL(void) USBFilterDelete(PUSBFILTER pFilter)
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79 | {
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80 | pFilter->u32Magic = ~USBFILTER_MAGIC;
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81 | pFilter->enmType = USBFILTERTYPE_INVALID;
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82 | pFilter->offCurEnd = 0xfffff;
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83 | }
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84 |
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85 |
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86 | /**
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87 | * Skips blanks.
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88 | *
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89 | * @returns Next non-blank char in the string.
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90 | * @param psz The string.
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91 | */
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92 | DECLINLINE(const char *) usbfilterSkipBlanks(const char *psz)
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93 | {
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94 | while (RT_C_IS_BLANK(*psz))
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95 | psz++;
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96 | return psz;
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97 | }
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98 |
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99 |
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100 | /**
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101 | * Worker for usbfilterReadNumber that parses a hexadecimal number.
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102 | *
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103 | * @returns Same as usbfilterReadNumber, except for VERR_NO_DIGITS.
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104 | * @param pszExpr Where to start converting, first char is a valid digit.
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105 | * @param ppszExpr See usbfilterReadNumber.
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106 | * @param pu16Val See usbfilterReadNumber.
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107 | */
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108 | static int usbfilterReadNumberHex(const char *pszExpr, const char **ppszExpr, uint16_t *pu16Val)
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109 | {
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110 | int rc = VINF_SUCCESS;
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111 | uint32_t u32 = 0;
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112 | do
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113 | {
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114 | unsigned uDigit = *pszExpr >= 'a' && *pszExpr <= 'f'
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115 | ? *pszExpr - 'a' + 10
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116 | : *pszExpr >= 'A' && *pszExpr <= 'F'
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117 | ? *pszExpr - 'A' + 10
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118 | : *pszExpr - '0';
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119 | if (uDigit >= 16)
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120 | break;
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121 | u32 *= 16;
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122 | u32 += uDigit;
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123 | if (u32 > UINT16_MAX)
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124 | rc = VWRN_NUMBER_TOO_BIG;
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125 | } while (*++pszExpr);
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126 |
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127 | *ppszExpr = usbfilterSkipBlanks(pszExpr);
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128 | *pu16Val = rc == VINF_SUCCESS ? u32 : UINT16_MAX;
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129 | return VINF_SUCCESS;
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130 | }
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131 |
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132 |
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133 | /**
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134 | * Worker for usbfilterReadNumber that parses a decimal number.
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135 | *
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136 | * @returns Same as usbfilterReadNumber, except for VERR_NO_DIGITS.
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137 | * @param pszExpr Where to start converting, first char is a valid digit.
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138 | * @param uBase The base - 8 or 16.
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139 | * @param ppszExpr See usbfilterReadNumber.
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140 | * @param pu16Val See usbfilterReadNumber.
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141 | */
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142 | static int usbfilterReadNumberDecimal(const char *pszExpr, unsigned uBase, const char **ppszExpr, uint16_t *pu16Val)
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143 | {
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144 | int rc = VINF_SUCCESS;
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145 | uint32_t u32 = 0;
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146 | do
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147 | {
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148 | unsigned uDigit = *pszExpr - '0';
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149 | if (uDigit >= uBase)
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150 | break;
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151 | u32 *= uBase;
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152 | u32 += uDigit;
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153 | if (u32 > UINT16_MAX)
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154 | rc = VWRN_NUMBER_TOO_BIG;
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155 | } while (*++pszExpr);
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156 |
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157 | *ppszExpr = usbfilterSkipBlanks(pszExpr);
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158 | *pu16Val = rc == VINF_SUCCESS ? u32 : UINT16_MAX;
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159 | return rc;
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160 | }
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161 |
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162 |
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163 | /**
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164 | * Reads a number from a numeric expression.
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165 | *
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166 | * @returns IPRT status code.
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167 | * @retval VINF_SUCCESS if all is fine. *ppszExpr and *pu16Val are updated.
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168 | * @retval VWRN_NUMBER_TOO_BIG if the number exceeds unsigned 16-bit, both *ppszExpr and *pu16Val are updated.
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169 | * @retval VERR_NO_DIGITS if there aren't any digits.
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170 | *
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171 | * @param ppszExpr Pointer to the current expression pointer.
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172 | * This is advanced past the expression and trailing blanks on success.
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173 | * @param pu16Val Where to store the value on success.
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174 | */
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175 | static int usbfilterReadNumber(const char **ppszExpr, uint16_t *pu16Val)
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176 | {
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177 | const char *pszExpr = usbfilterSkipBlanks(*ppszExpr);
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178 | if (!RT_C_IS_DIGIT(*pszExpr))
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179 | return VERR_NO_DIGITS;
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180 |
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181 | if (*pszExpr == '0')
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182 | {
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183 | if (pszExpr[1] == 'x' || pszExpr[1] == 'X')
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184 | {
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185 | if (!RT_C_IS_XDIGIT(pszExpr[2]))
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186 | return VERR_NO_DIGITS;
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187 | return usbfilterReadNumberHex(pszExpr + 2, ppszExpr, pu16Val);
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188 | }
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189 | if (RT_C_IS_ODIGIT(pszExpr[1]))
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190 | return usbfilterReadNumberDecimal(pszExpr + 1, 8, ppszExpr, pu16Val);
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191 | /* Solitary 0! */
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192 | if (RT_C_IS_DIGIT(pszExpr[1]))
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193 | return VERR_NO_DIGITS;
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194 | }
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195 | return usbfilterReadNumberDecimal(pszExpr, 10, ppszExpr, pu16Val);
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196 | }
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197 |
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198 |
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199 | /**
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200 | * Validates a numeric expression.
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201 | *
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202 | * @returns VBox status code.
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203 | * @retval VINF_SUCCESS if valid.
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204 | * @retval VERR_INVALID_PARAMETER if invalid.
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205 | * @retval VERR_NO_DIGITS if some expression is short of digits.
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206 | *
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207 | * @param pszExpr The numeric expression.
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208 | */
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209 | static int usbfilterValidateNumExpression(const char *pszExpr)
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210 | {
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211 | /*
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212 | * An empty expression is fine.
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213 | */
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214 | if (!*pszExpr)
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215 | return VINF_SUCCESS;
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216 |
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217 | /*
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218 | * The string format is: "(<m>|([<m>]-[<n>]))|(<m>|([<m>]-[<n>]))+"
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219 | * where <m> and <n> are numbers in the decimal, hex (0xNNN) or octal (0NNN)
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220 | * form. Spaces are allowed around <m> and <n>.
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221 | */
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222 | unsigned cSubExpressions = 0;
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223 | while (*pszExpr)
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224 | {
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225 | /*
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226 | * Skip remnants of the previous expression and any empty expressions.
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227 | * ('|' is the expression separator.)
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228 | */
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229 | while (*pszExpr == '|' || RT_C_IS_BLANK(*pszExpr))
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230 | pszExpr++;
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231 | if (!*pszExpr)
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232 | break;
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233 |
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234 | /*
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235 | * Parse the expression.
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236 | */
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237 | int rc;
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238 | uint16_t u16First = 0;
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239 | uint16_t u16Last = 0;
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240 | if (*pszExpr == '-')
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241 | {
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242 | /* -N */
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243 | pszExpr++;
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244 | rc = usbfilterReadNumber(&pszExpr, &u16Last);
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245 | }
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246 | else
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247 | {
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248 | /* M or M-N */
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249 | rc = usbfilterReadNumber(&pszExpr, &u16First);
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250 | if (RT_SUCCESS(rc))
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251 | {
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252 | if (*pszExpr == '-')
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253 | {
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254 | /* M-N */
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255 | pszExpr++;
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256 | rc = usbfilterReadNumber(&pszExpr, &u16Last);
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257 | }
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258 | else
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259 | {
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260 | /* M */
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261 | u16Last = u16First;
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262 | }
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263 | }
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264 | }
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265 | if (RT_FAILURE(rc))
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266 | return rc;
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267 |
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268 | /*
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269 | * We should either be at the end of the string or at
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270 | * an expression separator (|).
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271 | */
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272 | if (*pszExpr && *pszExpr != '|' )
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273 | return VERR_INVALID_PARAMETER;
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274 |
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275 | cSubExpressions++;
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276 | }
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277 |
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278 | return cSubExpressions ? VINF_SUCCESS : VERR_INVALID_PARAMETER;
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279 | }
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280 |
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281 |
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282 | /**
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283 | * Validates a string pattern.
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284 | *
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285 | * @returns VBox status code.
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286 | * @retval VINF_SUCCESS if valid.
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287 | * @retval VERR_INVALID_PARAMETER if invalid.
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288 | *
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289 | * @param psz The string pattern.
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290 | */
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291 | static int usbfilterValidateStringPattern(const char *psz)
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292 | {
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293 | /*
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294 | * This is only becomes important if we start doing
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295 | * sets ([0-9]) and such like.
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296 | */
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297 | RT_NOREF1(psz);
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298 | return VINF_SUCCESS;
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299 | }
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300 |
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301 |
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302 | /**
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303 | * Thoroughly validates the USB Filter.
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304 | *
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305 | * @returns Appropriate VBox status code.
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306 | * @param pFilter The filter to validate.
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307 | */
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308 | USBLIB_DECL(int) USBFilterValidate(PCUSBFILTER pFilter)
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309 | {
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310 | if (!VALID_PTR(pFilter))
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311 | return VERR_INVALID_POINTER;
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312 |
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313 | if (pFilter->u32Magic != USBFILTER_MAGIC)
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314 | return VERR_INVALID_MAGIC;
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315 |
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316 | if ( pFilter->enmType <= USBFILTERTYPE_INVALID
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317 | || pFilter->enmType >= USBFILTERTYPE_END)
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318 | {
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319 | Log(("USBFilter: %p - enmType=%d!\n", pFilter, pFilter->enmType));
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320 | return VERR_INVALID_PARAMETER;
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321 | }
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322 |
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323 | if (pFilter->offCurEnd >= sizeof(pFilter->achStrTab))
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324 | {
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325 | Log(("USBFilter: %p - offCurEnd=%#x!\n", pFilter, pFilter->offCurEnd));
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326 | return VERR_INVALID_PARAMETER;
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327 | }
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328 |
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329 | /*
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330 | * Validate the string table.
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331 | */
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332 | if (pFilter->achStrTab[0])
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333 | {
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334 | Log(("USBFilter: %p - bad null string\n", pFilter));
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335 | return VERR_INVALID_PARAMETER;
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336 | }
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337 |
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338 | const char *psz = &pFilter->achStrTab[1];
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339 | while (psz < &pFilter->achStrTab[pFilter->offCurEnd])
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340 | {
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341 | const char *pszEnd = RTStrEnd(psz, &pFilter->achStrTab[sizeof(pFilter->achStrTab)] - psz);
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342 | if (!pszEnd)
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343 | {
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344 | Log(("USBFilter: %p - string at %#x isn't terminated!\n",
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345 | pFilter, psz - &pFilter->achStrTab[0]));
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346 | return VERR_INVALID_PARAMETER;
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347 | }
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348 |
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349 | uint16_t off = (uint16_t)(uintptr_t)(psz - &pFilter->achStrTab[0]);
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350 | unsigned i;
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351 | for (i = 0; i < RT_ELEMENTS(pFilter->aFields); i++)
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352 | if ( USBFilterIsMethodString((USBFILTERMATCH)pFilter->aFields[i].enmMatch)
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353 | && pFilter->aFields[i].u16Value == off)
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354 | break;
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355 | if (i >= RT_ELEMENTS(pFilter->aFields))
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356 | {
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357 | Log(("USBFilter: %p - string at %#x isn't used by anyone! (%s)\n",
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358 | pFilter, psz - &pFilter->achStrTab[0], psz));
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359 | return VERR_INVALID_PARAMETER;
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360 | }
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361 |
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362 | psz = pszEnd + 1;
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363 | }
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364 |
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365 | if ((uintptr_t)(psz - &pFilter->achStrTab[0] - 1) != pFilter->offCurEnd)
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366 | {
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367 | Log(("USBFilter: %p - offCurEnd=%#x currently at %#x\n",
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368 | pFilter, pFilter->offCurEnd, psz - &pFilter->achStrTab[0] - 1));
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369 | return VERR_INVALID_PARAMETER;
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370 | }
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371 |
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372 | while (psz < &pFilter->achStrTab[sizeof(pFilter->achStrTab)])
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373 | {
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374 | if (*psz)
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375 | {
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376 | Log(("USBFilter: %p - str tab isn't zero padded! %#x: %c\n",
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377 | pFilter, psz - &pFilter->achStrTab[0], *psz));
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378 | return VERR_INVALID_PARAMETER;
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379 | }
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380 | psz++;
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381 | }
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382 |
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383 |
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384 | /*
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385 | * Validate the fields.
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386 | */
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387 | int rc;
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388 | for (unsigned i = 0; i < RT_ELEMENTS(pFilter->aFields); i++)
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389 | {
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390 | switch (pFilter->aFields[i].enmMatch)
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391 | {
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392 | case USBFILTERMATCH_IGNORE:
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393 | case USBFILTERMATCH_PRESENT:
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394 | if (pFilter->aFields[i].u16Value)
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395 | {
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396 | Log(("USBFilter: %p - #%d/%d u16Value=%d expected 0!\n",
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397 | pFilter, i, pFilter->aFields[i].enmMatch, pFilter->aFields[i].u16Value));
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398 | return VERR_INVALID_PARAMETER;
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399 | }
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400 | break;
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401 |
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402 | case USBFILTERMATCH_NUM_EXACT:
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403 | case USBFILTERMATCH_NUM_EXACT_NP:
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404 | if (!USBFilterIsNumericField((USBFILTERIDX)i))
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405 | {
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406 | Log(("USBFilter: %p - #%d / %d - not numeric field\n",
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407 | pFilter, i, pFilter->aFields[i].enmMatch));
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408 | return VERR_INVALID_PARAMETER;
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409 | }
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410 | break;
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411 |
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412 | case USBFILTERMATCH_NUM_EXPRESSION:
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413 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
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414 | if (!USBFilterIsNumericField((USBFILTERIDX)i))
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415 | {
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416 | Log(("USBFilter: %p - #%d / %d - not numeric field\n",
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417 | pFilter, i, pFilter->aFields[i].enmMatch));
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418 | return VERR_INVALID_PARAMETER;
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419 | }
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420 | if ( pFilter->aFields[i].u16Value >= pFilter->offCurEnd
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421 | && pFilter->offCurEnd)
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422 | {
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423 | Log(("USBFilter: %p - #%d / %d - off=%#x max=%#x\n",
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424 | pFilter, i, pFilter->aFields[i].enmMatch, pFilter->aFields[i].u16Value, pFilter->offCurEnd));
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425 | return VERR_INVALID_PARAMETER;
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426 | }
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427 | psz = &pFilter->achStrTab[pFilter->aFields[i].u16Value];
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428 | rc = usbfilterValidateNumExpression(psz);
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429 | if (RT_FAILURE(rc))
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430 | {
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431 | Log(("USBFilter: %p - #%d / %d - bad num expr: %s (rc=%Rrc)\n",
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432 | pFilter, i, pFilter->aFields[i].enmMatch, psz, rc));
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433 | return rc;
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434 | }
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435 | break;
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436 |
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437 | case USBFILTERMATCH_STR_EXACT:
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438 | case USBFILTERMATCH_STR_EXACT_NP:
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439 | if (!USBFilterIsStringField((USBFILTERIDX)i))
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440 | {
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441 | Log(("USBFilter: %p - #%d / %d - not string field\n",
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---|
442 | pFilter, i, pFilter->aFields[i].enmMatch));
|
---|
443 | return VERR_INVALID_PARAMETER;
|
---|
444 | }
|
---|
445 | if ( pFilter->aFields[i].u16Value >= pFilter->offCurEnd
|
---|
446 | && pFilter->offCurEnd)
|
---|
447 | {
|
---|
448 | Log(("USBFilter: %p - #%d / %d - off=%#x max=%#x\n",
|
---|
449 | pFilter, i, pFilter->aFields[i].enmMatch, pFilter->aFields[i].u16Value, pFilter->offCurEnd));
|
---|
450 | return VERR_INVALID_PARAMETER;
|
---|
451 | }
|
---|
452 | break;
|
---|
453 |
|
---|
454 | case USBFILTERMATCH_STR_PATTERN:
|
---|
455 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
456 | if (!USBFilterIsStringField((USBFILTERIDX)i))
|
---|
457 | {
|
---|
458 | Log(("USBFilter: %p - #%d / %d - not string field\n",
|
---|
459 | pFilter, i, pFilter->aFields[i].enmMatch));
|
---|
460 | return VERR_INVALID_PARAMETER;
|
---|
461 | }
|
---|
462 | if ( pFilter->aFields[i].u16Value >= pFilter->offCurEnd
|
---|
463 | && pFilter->offCurEnd)
|
---|
464 | {
|
---|
465 | Log(("USBFilter: %p - #%d / %d - off=%#x max=%#x\n",
|
---|
466 | pFilter, i, pFilter->aFields[i].enmMatch, pFilter->aFields[i].u16Value, pFilter->offCurEnd));
|
---|
467 | return VERR_INVALID_PARAMETER;
|
---|
468 | }
|
---|
469 | psz = &pFilter->achStrTab[pFilter->aFields[i].u16Value];
|
---|
470 | rc = usbfilterValidateStringPattern(psz);
|
---|
471 | if (RT_FAILURE(rc))
|
---|
472 | {
|
---|
473 | Log(("USBFilter: %p - #%d / %d - bad string pattern: %s (rc=%Rrc)\n",
|
---|
474 | pFilter, i, pFilter->aFields[i].enmMatch, psz, rc));
|
---|
475 | return rc;
|
---|
476 | }
|
---|
477 | break;
|
---|
478 |
|
---|
479 | default:
|
---|
480 | Log(("USBFilter: %p - #%d enmMatch=%d!\n", pFilter, i, pFilter->aFields[i].enmMatch));
|
---|
481 | return VERR_INVALID_PARAMETER;
|
---|
482 | }
|
---|
483 | }
|
---|
484 |
|
---|
485 | return VINF_SUCCESS;
|
---|
486 | }
|
---|
487 |
|
---|
488 |
|
---|
489 | /**
|
---|
490 | * Find the specified field in the string table.
|
---|
491 | *
|
---|
492 | * @returns Pointer to the string in the string table on success.
|
---|
493 | * NULL if the field is invalid or it doesn't have a string value.
|
---|
494 | * @param pFilter The filter.
|
---|
495 | * @param enmFieldIdx The field index.
|
---|
496 | */
|
---|
497 | DECLINLINE(const char *) usbfilterGetString(PCUSBFILTER pFilter, USBFILTERIDX enmFieldIdx)
|
---|
498 | {
|
---|
499 | if ((unsigned)enmFieldIdx < (unsigned)USBFILTERIDX_END)
|
---|
500 | {
|
---|
501 | switch (pFilter->aFields[enmFieldIdx].enmMatch)
|
---|
502 | {
|
---|
503 | case USBFILTERMATCH_NUM_EXPRESSION:
|
---|
504 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
|
---|
505 | case USBFILTERMATCH_STR_EXACT:
|
---|
506 | case USBFILTERMATCH_STR_EXACT_NP:
|
---|
507 | case USBFILTERMATCH_STR_PATTERN:
|
---|
508 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
509 | Assert(pFilter->aFields[enmFieldIdx].u16Value < sizeof(pFilter->achStrTab));
|
---|
510 | return &pFilter->achStrTab[pFilter->aFields[enmFieldIdx].u16Value];
|
---|
511 |
|
---|
512 | default:
|
---|
513 | AssertMsgFailed(("%d\n", pFilter->aFields[enmFieldIdx].enmMatch));
|
---|
514 | case USBFILTERMATCH_IGNORE:
|
---|
515 | case USBFILTERMATCH_PRESENT:
|
---|
516 | case USBFILTERMATCH_NUM_EXACT:
|
---|
517 | case USBFILTERMATCH_NUM_EXACT_NP:
|
---|
518 | break;
|
---|
519 | }
|
---|
520 | }
|
---|
521 | return NULL;
|
---|
522 | }
|
---|
523 |
|
---|
524 |
|
---|
525 | /**
|
---|
526 | * Gets a number value of a field.
|
---|
527 | *
|
---|
528 | * The field must contain a numeric value.
|
---|
529 | *
|
---|
530 | * @returns The field value on success, -1 on failure (invalid input / not numeric).
|
---|
531 | * @param pFilter The filter.
|
---|
532 | * @param enmFieldIdx The field index.
|
---|
533 | */
|
---|
534 | DECLINLINE(int) usbfilterGetNum(PCUSBFILTER pFilter, USBFILTERIDX enmFieldIdx)
|
---|
535 | {
|
---|
536 | if ((unsigned)enmFieldIdx < (unsigned)USBFILTERIDX_END)
|
---|
537 | {
|
---|
538 | switch (pFilter->aFields[enmFieldIdx].enmMatch)
|
---|
539 | {
|
---|
540 | case USBFILTERMATCH_NUM_EXACT:
|
---|
541 | case USBFILTERMATCH_NUM_EXACT_NP:
|
---|
542 | return pFilter->aFields[enmFieldIdx].u16Value;
|
---|
543 |
|
---|
544 | default:
|
---|
545 | AssertMsgFailed(("%d\n", pFilter->aFields[enmFieldIdx].enmMatch));
|
---|
546 | case USBFILTERMATCH_IGNORE:
|
---|
547 | case USBFILTERMATCH_PRESENT:
|
---|
548 | case USBFILTERMATCH_NUM_EXPRESSION:
|
---|
549 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
|
---|
550 | case USBFILTERMATCH_STR_EXACT:
|
---|
551 | case USBFILTERMATCH_STR_EXACT_NP:
|
---|
552 | case USBFILTERMATCH_STR_PATTERN:
|
---|
553 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
554 | break;
|
---|
555 | }
|
---|
556 | }
|
---|
557 | return -1;
|
---|
558 | }
|
---|
559 |
|
---|
560 |
|
---|
561 | /**
|
---|
562 | * Performs simple pattern matching.
|
---|
563 | *
|
---|
564 | * @returns true on match and false on mismatch.
|
---|
565 | * @param pszExpr The numeric expression.
|
---|
566 | * @param u16Value The value to match.
|
---|
567 | */
|
---|
568 | static bool usbfilterMatchNumExpression(const char *pszExpr, uint16_t u16Value)
|
---|
569 | {
|
---|
570 | /*
|
---|
571 | * The string format is: "(<m>|([<m>]-[<n>]))|(<m>|([<m>]-[<n>]))+"
|
---|
572 | * where <m> and <n> are numbers in the decimal, hex (0xNNN) or octal (0NNN)
|
---|
573 | * form. Spaces are allowed around <m> and <n>.
|
---|
574 | */
|
---|
575 | while (*pszExpr)
|
---|
576 | {
|
---|
577 | /*
|
---|
578 | * Skip remnants of the previous expression and any empty expressions.
|
---|
579 | * ('|' is the expression separator.)
|
---|
580 | */
|
---|
581 | while (*pszExpr == '|' || RT_C_IS_BLANK(*pszExpr))
|
---|
582 | pszExpr++;
|
---|
583 | if (!*pszExpr)
|
---|
584 | break;
|
---|
585 |
|
---|
586 | /*
|
---|
587 | * Parse the expression.
|
---|
588 | */
|
---|
589 | int rc;
|
---|
590 | uint16_t u16First = 0;
|
---|
591 | uint16_t u16Last = 0;
|
---|
592 | if (*pszExpr == '-')
|
---|
593 | {
|
---|
594 | /* -N */
|
---|
595 | pszExpr++;
|
---|
596 | rc = usbfilterReadNumber(&pszExpr, &u16Last);
|
---|
597 | }
|
---|
598 | else
|
---|
599 | {
|
---|
600 | /* M or M-N */
|
---|
601 | rc = usbfilterReadNumber(&pszExpr, &u16First);
|
---|
602 | if (RT_SUCCESS(rc))
|
---|
603 | {
|
---|
604 | pszExpr = usbfilterSkipBlanks(pszExpr);
|
---|
605 | if (*pszExpr == '-')
|
---|
606 | {
|
---|
607 | /* M-N */
|
---|
608 | pszExpr++;
|
---|
609 | rc = usbfilterReadNumber(&pszExpr, &u16Last);
|
---|
610 | }
|
---|
611 | else
|
---|
612 | {
|
---|
613 | /* M */
|
---|
614 | u16Last = u16First;
|
---|
615 | }
|
---|
616 | }
|
---|
617 | }
|
---|
618 |
|
---|
619 | /* On success, we should either be at the end of the string or
|
---|
620 | at an expression separator (|). */
|
---|
621 | if (RT_SUCCESS(rc) && *pszExpr && *pszExpr != '|' )
|
---|
622 | rc = VERR_INVALID_PARAMETER;
|
---|
623 | if (RT_SUCCESS(rc))
|
---|
624 | {
|
---|
625 | /*
|
---|
626 | * Swap the values if the order is mixed up.
|
---|
627 | */
|
---|
628 | if (u16First > u16Last)
|
---|
629 | {
|
---|
630 | uint16_t u16Tmp = u16First;
|
---|
631 | u16First = u16Last;
|
---|
632 | u16Last = u16Tmp;
|
---|
633 | }
|
---|
634 |
|
---|
635 | /*
|
---|
636 | * Perform the compare.
|
---|
637 | */
|
---|
638 | if ( u16Value >= u16First
|
---|
639 | && u16Value <= u16Last)
|
---|
640 | return true;
|
---|
641 | }
|
---|
642 | else
|
---|
643 | {
|
---|
644 | /*
|
---|
645 | * Skip the bad expression.
|
---|
646 | * ('|' is the expression separator.)
|
---|
647 | */
|
---|
648 | while (*pszExpr && *pszExpr != '|')
|
---|
649 | pszExpr++;
|
---|
650 | }
|
---|
651 | }
|
---|
652 |
|
---|
653 | return false;
|
---|
654 | }
|
---|
655 |
|
---|
656 |
|
---|
657 | /**
|
---|
658 | * Performs simple pattern matching.
|
---|
659 | *
|
---|
660 | * @returns true on match and false on mismatch.
|
---|
661 | * @param pszPattern The pattern to match against.
|
---|
662 | * @param psz The string to match.
|
---|
663 | */
|
---|
664 | static bool usbfilterMatchStringPattern(const char *pszPattern, const char *psz)
|
---|
665 | {
|
---|
666 | char ch;
|
---|
667 | while ((ch = *pszPattern++))
|
---|
668 | {
|
---|
669 | if (ch == '?')
|
---|
670 | {
|
---|
671 | /*
|
---|
672 | * Matches one char or end of string.
|
---|
673 | */
|
---|
674 | if (*psz)
|
---|
675 | psz++;
|
---|
676 | }
|
---|
677 | else if (ch == '*')
|
---|
678 | {
|
---|
679 | /*
|
---|
680 | * Matches zero or more characters.
|
---|
681 | */
|
---|
682 | /* skip subsequent wildcards */
|
---|
683 | while ( (ch = *pszPattern) == '*'
|
---|
684 | || ch == '?')
|
---|
685 | pszPattern++;
|
---|
686 | if (!ch)
|
---|
687 | /* Pattern ends with a '*' and thus matches the rest of psz. */
|
---|
688 | return true;
|
---|
689 |
|
---|
690 | /* Find the length of the following exact pattern sequence. */
|
---|
691 | ssize_t cchMatch = 1;
|
---|
692 | while ( (ch = pszPattern[cchMatch]) != '\0'
|
---|
693 | && ch != '*'
|
---|
694 | && ch != '?')
|
---|
695 | cchMatch++;
|
---|
696 |
|
---|
697 | /* Check if the exact pattern sequence is too long. */
|
---|
698 | ssize_t cch = strlen(psz);
|
---|
699 | cch -= cchMatch;
|
---|
700 | if (cch < 0)
|
---|
701 | return false;
|
---|
702 |
|
---|
703 | /* Is the rest an exact match? */
|
---|
704 | if (!ch)
|
---|
705 | return memcmp(psz + cch, pszPattern, cchMatch) == 0;
|
---|
706 |
|
---|
707 | /*
|
---|
708 | * This is where things normally starts to get recursive or ugly.
|
---|
709 | *
|
---|
710 | * Just to make life simple, we'll skip the nasty stuff and say
|
---|
711 | * that we will do a maximal wildcard match and forget about any
|
---|
712 | * alternative matches.
|
---|
713 | *
|
---|
714 | * If somebody is bored out of their mind one day, feel free to
|
---|
715 | * implement correct matching without using recursion.
|
---|
716 | */
|
---|
717 | ch = *pszPattern;
|
---|
718 | const char *pszMatch = NULL;
|
---|
719 | while ( cch-- >= 0
|
---|
720 | && *psz)
|
---|
721 | {
|
---|
722 | if ( *psz == ch
|
---|
723 | && !strncmp(psz, pszPattern, cchMatch))
|
---|
724 | pszMatch = psz;
|
---|
725 | psz++;
|
---|
726 | }
|
---|
727 | if (!pszMatch)
|
---|
728 | return false;
|
---|
729 |
|
---|
730 | /* advance */
|
---|
731 | psz = pszMatch + cchMatch;
|
---|
732 | pszPattern += cchMatch;
|
---|
733 | }
|
---|
734 | else
|
---|
735 | {
|
---|
736 | /* exact match */
|
---|
737 | if (ch != *psz)
|
---|
738 | return false;
|
---|
739 | psz++;
|
---|
740 | }
|
---|
741 | }
|
---|
742 |
|
---|
743 | return *psz == '\0';
|
---|
744 | }
|
---|
745 |
|
---|
746 |
|
---|
747 | /**
|
---|
748 | * Match a filter against a device.
|
---|
749 | *
|
---|
750 | * @returns true if they match, false if not.
|
---|
751 | *
|
---|
752 | * @param pFilter The filter to match with.
|
---|
753 | * @param pDevice The device data. This is a filter (type ignored) that
|
---|
754 | * contains 'exact' values for all present fields and 'ignore'
|
---|
755 | * values for the non-present fields.
|
---|
756 | *
|
---|
757 | * @remark Both the filter and the device are ASSUMED to be valid because
|
---|
758 | * we don't wish to waste any time in this function.
|
---|
759 | */
|
---|
760 | USBLIB_DECL(bool) USBFilterMatch(PCUSBFILTER pFilter, PCUSBFILTER pDevice)
|
---|
761 | {
|
---|
762 | return USBFilterMatchRated(pFilter, pDevice) > 0;
|
---|
763 | }
|
---|
764 |
|
---|
765 |
|
---|
766 | #if 0 /*def IN_RING0*/ /** @todo convert to proper logging. */
|
---|
767 | extern "C" int printf(const char *format, ...);
|
---|
768 | # define dprintf(a) printf a
|
---|
769 | #else
|
---|
770 | # define dprintf(a) do {} while (0)
|
---|
771 | #endif
|
---|
772 |
|
---|
773 | /**
|
---|
774 | * Match a filter against a device and rate the result.
|
---|
775 | *
|
---|
776 | * @returns -1 if no match, matching rate between 1 and 100 (inclusive) if matched.
|
---|
777 | *
|
---|
778 | * @param pFilter The filter to match with.
|
---|
779 | * @param pDevice The device data. This is a filter (type ignored) that
|
---|
780 | * contains 'exact' values for all present fields and 'ignore'
|
---|
781 | * values for the non-present fields.
|
---|
782 | *
|
---|
783 | * @remark Both the filter and the device are ASSUMED to be valid because
|
---|
784 | * we don't wish to waste any time in this function.
|
---|
785 | */
|
---|
786 | USBLIB_DECL(int) USBFilterMatchRated(PCUSBFILTER pFilter, PCUSBFILTER pDevice)
|
---|
787 | {
|
---|
788 | unsigned iRate = 0;
|
---|
789 | dprintf(("USBFilterMatchRated: %p %p\n", pFilter, pDevice));
|
---|
790 |
|
---|
791 | for (unsigned i = 0; i < RT_ELEMENTS(pFilter->aFields); i++)
|
---|
792 | {
|
---|
793 | switch (pFilter->aFields[i].enmMatch)
|
---|
794 | {
|
---|
795 | case USBFILTERMATCH_IGNORE:
|
---|
796 | iRate += 2;
|
---|
797 | break;
|
---|
798 |
|
---|
799 | case USBFILTERMATCH_PRESENT:
|
---|
800 | if (pDevice->aFields[i].enmMatch == USBFILTERMATCH_IGNORE)
|
---|
801 | {
|
---|
802 | dprintf(("filter match[%d]: !present\n", i));
|
---|
803 | return -1;
|
---|
804 | }
|
---|
805 | iRate += 2;
|
---|
806 | break;
|
---|
807 |
|
---|
808 | case USBFILTERMATCH_NUM_EXACT:
|
---|
809 | if ( pDevice->aFields[i].enmMatch == USBFILTERMATCH_IGNORE
|
---|
810 | || pFilter->aFields[i].u16Value != pDevice->aFields[i].u16Value)
|
---|
811 | {
|
---|
812 | if (pDevice->aFields[i].enmMatch == USBFILTERMATCH_IGNORE)
|
---|
813 | dprintf(("filter match[%d]: !num_exact device=ignore\n", i));
|
---|
814 | else
|
---|
815 | dprintf(("filter match[%d]: !num_exact %#x (filter) != %#x (device)\n", i, pFilter->aFields[i].u16Value, pDevice->aFields[i].u16Value));
|
---|
816 | return -1;
|
---|
817 | }
|
---|
818 | iRate += 2;
|
---|
819 | break;
|
---|
820 |
|
---|
821 | case USBFILTERMATCH_NUM_EXACT_NP:
|
---|
822 | if ( pDevice->aFields[i].enmMatch != USBFILTERMATCH_IGNORE
|
---|
823 | && pFilter->aFields[i].u16Value != pDevice->aFields[i].u16Value)
|
---|
824 | {
|
---|
825 | dprintf(("filter match[%d]: !num_exact_np %#x (filter) != %#x (device)\n", i, pFilter->aFields[i].u16Value, pDevice->aFields[i].u16Value));
|
---|
826 | return -1;
|
---|
827 | }
|
---|
828 | iRate += 2;
|
---|
829 | break;
|
---|
830 |
|
---|
831 | case USBFILTERMATCH_NUM_EXPRESSION:
|
---|
832 | if ( pDevice->aFields[i].enmMatch == USBFILTERMATCH_IGNORE
|
---|
833 | || !usbfilterMatchNumExpression(usbfilterGetString(pFilter, (USBFILTERIDX)i),
|
---|
834 | pDevice->aFields[i].u16Value))
|
---|
835 | {
|
---|
836 | dprintf(("filter match[%d]: !num_expression\n", i));
|
---|
837 | return -1;
|
---|
838 | }
|
---|
839 | iRate += 1;
|
---|
840 | break;
|
---|
841 |
|
---|
842 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
|
---|
843 | if ( pDevice->aFields[i].enmMatch != USBFILTERMATCH_IGNORE
|
---|
844 | && !usbfilterMatchNumExpression(usbfilterGetString(pFilter, (USBFILTERIDX)i),
|
---|
845 | pDevice->aFields[i].u16Value))
|
---|
846 | {
|
---|
847 | dprintf(("filter match[%d]: !num_expression_no\n", i));
|
---|
848 | return -1;
|
---|
849 | }
|
---|
850 | iRate += 1;
|
---|
851 | break;
|
---|
852 |
|
---|
853 | case USBFILTERMATCH_STR_EXACT:
|
---|
854 | if ( pDevice->aFields[i].enmMatch == USBFILTERMATCH_IGNORE
|
---|
855 | || strcmp(usbfilterGetString(pFilter, (USBFILTERIDX)i),
|
---|
856 | usbfilterGetString(pDevice, (USBFILTERIDX)i)))
|
---|
857 | {
|
---|
858 | dprintf(("filter match[%d]: !str_exact\n", i));
|
---|
859 | return -1;
|
---|
860 | }
|
---|
861 | iRate += 2;
|
---|
862 | break;
|
---|
863 |
|
---|
864 | case USBFILTERMATCH_STR_EXACT_NP:
|
---|
865 | if ( pDevice->aFields[i].enmMatch != USBFILTERMATCH_IGNORE
|
---|
866 | && strcmp(usbfilterGetString(pFilter, (USBFILTERIDX)i),
|
---|
867 | usbfilterGetString(pDevice, (USBFILTERIDX)i)))
|
---|
868 | {
|
---|
869 | dprintf(("filter match[%d]: !str_exact_np\n", i));
|
---|
870 | return -1;
|
---|
871 | }
|
---|
872 | iRate += 2;
|
---|
873 | break;
|
---|
874 |
|
---|
875 | case USBFILTERMATCH_STR_PATTERN:
|
---|
876 | if ( pDevice->aFields[i].enmMatch == USBFILTERMATCH_IGNORE
|
---|
877 | || !usbfilterMatchStringPattern(usbfilterGetString(pFilter, (USBFILTERIDX)i),
|
---|
878 | usbfilterGetString(pDevice, (USBFILTERIDX)i)))
|
---|
879 | {
|
---|
880 | dprintf(("filter match[%d]: !str_pattern\n", i));
|
---|
881 | return -1;
|
---|
882 | }
|
---|
883 | iRate += 1;
|
---|
884 | break;
|
---|
885 |
|
---|
886 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
887 | if ( pDevice->aFields[i].enmMatch != USBFILTERMATCH_IGNORE
|
---|
888 | && !usbfilterMatchStringPattern(usbfilterGetString(pFilter, (USBFILTERIDX)i),
|
---|
889 | usbfilterGetString(pDevice, (USBFILTERIDX)i)))
|
---|
890 | {
|
---|
891 | dprintf(("filter match[%d]: !str_pattern_np\n", i));
|
---|
892 | return -1;
|
---|
893 | }
|
---|
894 | iRate += 1;
|
---|
895 | break;
|
---|
896 |
|
---|
897 | default:
|
---|
898 | AssertMsgFailed(("#%d: %d\n", i, pFilter->aFields[i].enmMatch));
|
---|
899 | return -1;
|
---|
900 | }
|
---|
901 | }
|
---|
902 |
|
---|
903 | /* iRate is the range 0..2*cFields - recalc to percent. */
|
---|
904 | dprintf(("filter match: iRate=%d", iRate));
|
---|
905 | return iRate == 2 * RT_ELEMENTS(pFilter->aFields)
|
---|
906 | ? 100
|
---|
907 | : (iRate * 100) / (2 * RT_ELEMENTS(pFilter->aFields));
|
---|
908 | }
|
---|
909 |
|
---|
910 |
|
---|
911 | /**
|
---|
912 | * Match a filter against a USBDEVICE.
|
---|
913 | *
|
---|
914 | * @returns true if they match, false if not.
|
---|
915 | *
|
---|
916 | * @param pFilter The filter to match with.
|
---|
917 | * @param pDevice The device to match.
|
---|
918 | *
|
---|
919 | * @remark Both the filter and the device are ASSUMED to be valid because
|
---|
920 | * we don't wish to waste any time in this function.
|
---|
921 | */
|
---|
922 | USBLIB_DECL(bool) USBFilterMatchDevice(PCUSBFILTER pFilter, PUSBDEVICE pDevice)
|
---|
923 | {
|
---|
924 | for (unsigned i = 0; i < RT_ELEMENTS(pFilter->aFields); i++)
|
---|
925 | {
|
---|
926 | switch (pFilter->aFields[i].enmMatch)
|
---|
927 | {
|
---|
928 | case USBFILTERMATCH_IGNORE:
|
---|
929 | break;
|
---|
930 |
|
---|
931 | case USBFILTERMATCH_PRESENT:
|
---|
932 | {
|
---|
933 | const char *psz;
|
---|
934 | switch (i)
|
---|
935 | {
|
---|
936 | case USBFILTERIDX_MANUFACTURER_STR: psz = pDevice->pszManufacturer; break;
|
---|
937 | case USBFILTERIDX_PRODUCT_STR: psz = pDevice->pszProduct; break;
|
---|
938 | case USBFILTERIDX_SERIAL_NUMBER_STR: psz = pDevice->pszSerialNumber; break;
|
---|
939 | default: psz = ""; break;
|
---|
940 | }
|
---|
941 | if (!psz)
|
---|
942 | return false;
|
---|
943 | break;
|
---|
944 | }
|
---|
945 |
|
---|
946 | case USBFILTERMATCH_NUM_EXACT:
|
---|
947 | case USBFILTERMATCH_NUM_EXACT_NP:
|
---|
948 | case USBFILTERMATCH_NUM_EXPRESSION:
|
---|
949 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
|
---|
950 | {
|
---|
951 | uint16_t u16Value;
|
---|
952 | switch (i)
|
---|
953 | {
|
---|
954 | case USBFILTERIDX_VENDOR_ID: u16Value = pDevice->idVendor; break;
|
---|
955 | case USBFILTERIDX_PRODUCT_ID: u16Value = pDevice->idProduct; break;
|
---|
956 | case USBFILTERIDX_DEVICE: u16Value = pDevice->bcdDevice; break;
|
---|
957 | case USBFILTERIDX_DEVICE_CLASS: u16Value = pDevice->bDeviceClass; break;
|
---|
958 | case USBFILTERIDX_DEVICE_SUB_CLASS: u16Value = pDevice->bDeviceSubClass; break;
|
---|
959 | case USBFILTERIDX_DEVICE_PROTOCOL: u16Value = pDevice->bDeviceProtocol; break;
|
---|
960 | case USBFILTERIDX_BUS: u16Value = pDevice->bBus; break;
|
---|
961 | case USBFILTERIDX_PORT: u16Value = pDevice->bPort; break;
|
---|
962 | default: u16Value = UINT16_MAX; break;
|
---|
963 |
|
---|
964 | }
|
---|
965 | switch (pFilter->aFields[i].enmMatch)
|
---|
966 | {
|
---|
967 | case USBFILTERMATCH_NUM_EXACT:
|
---|
968 | case USBFILTERMATCH_NUM_EXACT_NP:
|
---|
969 | if (pFilter->aFields[i].u16Value != u16Value)
|
---|
970 | return false;
|
---|
971 | break;
|
---|
972 | case USBFILTERMATCH_NUM_EXPRESSION:
|
---|
973 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
|
---|
974 | if (!usbfilterMatchNumExpression(usbfilterGetString(pFilter, (USBFILTERIDX)i), u16Value))
|
---|
975 | return false;
|
---|
976 | break;
|
---|
977 | }
|
---|
978 | break;
|
---|
979 | }
|
---|
980 |
|
---|
981 | case USBFILTERMATCH_STR_EXACT:
|
---|
982 | case USBFILTERMATCH_STR_EXACT_NP:
|
---|
983 | case USBFILTERMATCH_STR_PATTERN:
|
---|
984 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
985 | {
|
---|
986 | const char *psz;
|
---|
987 | switch (i)
|
---|
988 | {
|
---|
989 | case USBFILTERIDX_MANUFACTURER_STR: psz = pDevice->pszManufacturer; break;
|
---|
990 | case USBFILTERIDX_PRODUCT_STR: psz = pDevice->pszProduct; break;
|
---|
991 | case USBFILTERIDX_SERIAL_NUMBER_STR: psz = pDevice->pszSerialNumber; break;
|
---|
992 | default: psz = NULL; break;
|
---|
993 | }
|
---|
994 | switch (pFilter->aFields[i].enmMatch)
|
---|
995 | {
|
---|
996 | case USBFILTERMATCH_STR_EXACT:
|
---|
997 | if ( !psz
|
---|
998 | || strcmp(usbfilterGetString(pFilter, (USBFILTERIDX)i), psz))
|
---|
999 | return false;
|
---|
1000 | break;
|
---|
1001 |
|
---|
1002 | case USBFILTERMATCH_STR_EXACT_NP:
|
---|
1003 | if ( psz
|
---|
1004 | && strcmp(usbfilterGetString(pFilter, (USBFILTERIDX)i), psz))
|
---|
1005 | return false;
|
---|
1006 | break;
|
---|
1007 |
|
---|
1008 | case USBFILTERMATCH_STR_PATTERN:
|
---|
1009 | if ( !psz
|
---|
1010 | || !usbfilterMatchStringPattern(usbfilterGetString(pFilter, (USBFILTERIDX)i), psz))
|
---|
1011 | return false;
|
---|
1012 | break;
|
---|
1013 |
|
---|
1014 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
1015 | if ( psz
|
---|
1016 | && !usbfilterMatchStringPattern(usbfilterGetString(pFilter, (USBFILTERIDX)i), psz))
|
---|
1017 | return false;
|
---|
1018 | break;
|
---|
1019 | }
|
---|
1020 | break;
|
---|
1021 | }
|
---|
1022 |
|
---|
1023 | default:
|
---|
1024 | AssertMsgFailed(("#%d: %d\n", i, pFilter->aFields[i].enmMatch));
|
---|
1025 | return false;
|
---|
1026 | }
|
---|
1027 | }
|
---|
1028 |
|
---|
1029 | return true;
|
---|
1030 | }
|
---|
1031 |
|
---|
1032 |
|
---|
1033 | /**
|
---|
1034 | * Checks if the two filters are identical.
|
---|
1035 | *
|
---|
1036 | * @returns true if the are identical, false if they aren't.
|
---|
1037 | * @param pFilter The first filter.
|
---|
1038 | * @param pFilter2 The second filter.
|
---|
1039 | */
|
---|
1040 | USBLIB_DECL(bool) USBFilterIsIdentical(PCUSBFILTER pFilter, PCUSBFILTER pFilter2)
|
---|
1041 | {
|
---|
1042 | /* Lazy works here because we're darn strict with zero padding and such elsewhere. */
|
---|
1043 | return memcmp(pFilter, pFilter2, sizeof(*pFilter)) == 0;
|
---|
1044 | }
|
---|
1045 |
|
---|
1046 |
|
---|
1047 |
|
---|
1048 | /**
|
---|
1049 | * Sets the filter type.
|
---|
1050 | *
|
---|
1051 | * @returns VBox status code.
|
---|
1052 | * @retval VERR_INVALID_PARAMETER if the filter type is invalid.
|
---|
1053 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1054 | *
|
---|
1055 | * @param pFilter The filter.
|
---|
1056 | * @param enmType The new filter type.
|
---|
1057 | */
|
---|
1058 | USBLIB_DECL(int) USBFilterSetFilterType(PUSBFILTER pFilter, USBFILTERTYPE enmType)
|
---|
1059 | {
|
---|
1060 | AssertReturn(pFilter->u32Magic == USBFILTER_MAGIC, VERR_INVALID_MAGIC);
|
---|
1061 | AssertReturn(enmType > USBFILTERTYPE_INVALID && enmType < USBFILTERTYPE_END, VERR_INVALID_PARAMETER);
|
---|
1062 |
|
---|
1063 | pFilter->enmType = enmType;
|
---|
1064 | return VINF_SUCCESS;
|
---|
1065 | }
|
---|
1066 |
|
---|
1067 |
|
---|
1068 | /**
|
---|
1069 | * Replaces the string value of a field.
|
---|
1070 | *
|
---|
1071 | * This will remove any existing string value current held by the field from the
|
---|
1072 | * string table and then attempt to add the new value. This function can be used
|
---|
1073 | * to delete any assigned string before changing the type to numeric by passing
|
---|
1074 | * in an empty string. This works because the first byte in the string table is
|
---|
1075 | * reserved for the empty (NULL) string.
|
---|
1076 | *
|
---|
1077 | * @returns VBox status code.
|
---|
1078 | * @retval VINF_SUCCESS on success.
|
---|
1079 | * @retval VERR_BUFFER_OVERFLOW if the string table is full.
|
---|
1080 | * @retval VERR_INVALID_PARAMETER if the enmFieldIdx isn't valid.
|
---|
1081 | * @retval VERR_INVALID_POINTER if pszString isn't valid.
|
---|
1082 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1083 | *
|
---|
1084 | * @param pFilter The filter.
|
---|
1085 | * @param enmFieldIdx The field index.
|
---|
1086 | * @param pszString The string to add.
|
---|
1087 | * @param fPurge Purge invalid UTF-8 encoding and control characters
|
---|
1088 | * before setting it.
|
---|
1089 | */
|
---|
1090 | static int usbfilterSetString(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx, const char *pszString, bool fPurge)
|
---|
1091 | {
|
---|
1092 | /*
|
---|
1093 | * Validate input.
|
---|
1094 | */
|
---|
1095 | AssertReturn(pFilter->u32Magic == USBFILTER_MAGIC, VERR_INVALID_MAGIC);
|
---|
1096 | AssertReturn((unsigned)enmFieldIdx < (unsigned)USBFILTERIDX_END, VERR_INVALID_PARAMETER);
|
---|
1097 | AssertPtrReturn(pszString, VERR_INVALID_POINTER);
|
---|
1098 |
|
---|
1099 | Assert(pFilter->offCurEnd < sizeof(pFilter->achStrTab));
|
---|
1100 | Assert(pFilter->achStrTab[pFilter->offCurEnd] == '\0');
|
---|
1101 |
|
---|
1102 | /*
|
---|
1103 | * Remove old string value if any.
|
---|
1104 | */
|
---|
1105 | if ( USBFilterIsMethodUsingStringValue((USBFILTERMATCH)pFilter->aFields[enmFieldIdx].enmMatch)
|
---|
1106 | && pFilter->aFields[enmFieldIdx].u16Value != 0)
|
---|
1107 | {
|
---|
1108 | uint32_t off = pFilter->aFields[enmFieldIdx].u16Value;
|
---|
1109 | pFilter->aFields[enmFieldIdx].u16Value = 0; /* Assign it to the NULL string. */
|
---|
1110 |
|
---|
1111 | unsigned cchShift = (unsigned)strlen(&pFilter->achStrTab[off]) + 1;
|
---|
1112 | ssize_t cchToMove = (pFilter->offCurEnd + 1) - (off + cchShift);
|
---|
1113 | Assert(cchToMove >= 0);
|
---|
1114 | if (cchToMove > 0)
|
---|
1115 | {
|
---|
1116 | /* We're not last - must shift the strings. */
|
---|
1117 | memmove(&pFilter->achStrTab[off], &pFilter->achStrTab[off + cchShift], cchToMove);
|
---|
1118 | for (unsigned i = 0; i < RT_ELEMENTS(pFilter->aFields); i++)
|
---|
1119 | if ( pFilter->aFields[i].u16Value >= off
|
---|
1120 | && USBFilterIsMethodUsingStringValue((USBFILTERMATCH)pFilter->aFields[i].enmMatch))
|
---|
1121 | pFilter->aFields[i].u16Value -= cchShift;
|
---|
1122 | }
|
---|
1123 | pFilter->offCurEnd -= cchShift;
|
---|
1124 | Assert(pFilter->offCurEnd < sizeof(pFilter->achStrTab));
|
---|
1125 | Assert(pFilter->offCurEnd + cchShift <= sizeof(pFilter->achStrTab));
|
---|
1126 |
|
---|
1127 | /* zero the unused string table (to allow lazyness/strictness elsewhere). */
|
---|
1128 | memset(&pFilter->achStrTab[pFilter->offCurEnd], '\0', cchShift);
|
---|
1129 | }
|
---|
1130 |
|
---|
1131 | /*
|
---|
1132 | * Make a special case for the empty string.
|
---|
1133 | * (This also makes the delete logical above work correctly for the last string.)
|
---|
1134 | */
|
---|
1135 | if (!*pszString)
|
---|
1136 | pFilter->aFields[enmFieldIdx].u16Value = 0;
|
---|
1137 | else
|
---|
1138 | {
|
---|
1139 | size_t cch = strlen(pszString);
|
---|
1140 | if (pFilter->offCurEnd + cch + 2 > sizeof(pFilter->achStrTab))
|
---|
1141 | return VERR_BUFFER_OVERFLOW;
|
---|
1142 |
|
---|
1143 | pFilter->aFields[enmFieldIdx].u16Value = pFilter->offCurEnd + 1;
|
---|
1144 | memcpy(&pFilter->achStrTab[pFilter->offCurEnd + 1], pszString, cch + 1);
|
---|
1145 | if (fPurge)
|
---|
1146 | cch = USBLibPurgeEncoding(&pFilter->achStrTab[pFilter->offCurEnd + 1]);
|
---|
1147 | pFilter->offCurEnd += (uint32_t)cch + 1;
|
---|
1148 | }
|
---|
1149 |
|
---|
1150 | return VINF_SUCCESS;
|
---|
1151 | }
|
---|
1152 |
|
---|
1153 | /**
|
---|
1154 | * Wrapper around usbfilterSetString() that deletes any string value
|
---|
1155 | * currently assigned to a field.
|
---|
1156 | *
|
---|
1157 | * Upon successful return the field contains a null string, nothing or a number.
|
---|
1158 | *
|
---|
1159 | * This function will validate the field index if there isn't any string
|
---|
1160 | * value to delete, thus preventing any extra validating of the index.
|
---|
1161 | *
|
---|
1162 | * @returns VBox status code. See usbfilterSetString.
|
---|
1163 | * @param pFilter The filter.
|
---|
1164 | * @param enmFieldIdx The index of the field which string value should be deleted.
|
---|
1165 | */
|
---|
1166 | static int usbfilterDeleteAnyStringValue(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx)
|
---|
1167 | {
|
---|
1168 | int rc = VINF_SUCCESS;
|
---|
1169 | if ( USBFilterIsMethodUsingStringValue((USBFILTERMATCH)pFilter->aFields[enmFieldIdx].enmMatch)
|
---|
1170 | && pFilter->aFields[enmFieldIdx].u16Value != 0)
|
---|
1171 | rc = usbfilterSetString(pFilter, enmFieldIdx, "", false /*fPurge*/);
|
---|
1172 | else if ((unsigned)enmFieldIdx >= (unsigned)USBFILTERIDX_END)
|
---|
1173 | rc = VERR_INVALID_PARAMETER;
|
---|
1174 | return rc;
|
---|
1175 | }
|
---|
1176 |
|
---|
1177 |
|
---|
1178 | /**
|
---|
1179 | * Sets a field to always match (ignore whatever is thrown at it).
|
---|
1180 | *
|
---|
1181 | * @returns VBox status code.
|
---|
1182 | * @retval VINF_SUCCESS on success.
|
---|
1183 | * @retval VERR_INVALID_PARAMETER if the enmFieldIdx isn't valid.
|
---|
1184 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1185 | *
|
---|
1186 | * @param pFilter The filter.
|
---|
1187 | * @param enmFieldIdx The field index. This must be a string field.
|
---|
1188 | */
|
---|
1189 | USBLIB_DECL(int) USBFilterSetIgnore(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx)
|
---|
1190 | {
|
---|
1191 | int rc = usbfilterDeleteAnyStringValue(pFilter, enmFieldIdx);
|
---|
1192 | if (RT_SUCCESS(rc))
|
---|
1193 | {
|
---|
1194 | pFilter->aFields[enmFieldIdx].enmMatch = USBFILTERMATCH_IGNORE;
|
---|
1195 | pFilter->aFields[enmFieldIdx].u16Value = 0;
|
---|
1196 | }
|
---|
1197 | return rc;
|
---|
1198 | }
|
---|
1199 |
|
---|
1200 |
|
---|
1201 | /**
|
---|
1202 | * Sets a field to match on device field present only.
|
---|
1203 | *
|
---|
1204 | * @returns VBox status code.
|
---|
1205 | * @retval VINF_SUCCESS on success.
|
---|
1206 | * @retval VERR_INVALID_PARAMETER if the enmFieldIdx isn't valid.
|
---|
1207 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1208 | *
|
---|
1209 | * @param pFilter The filter.
|
---|
1210 | * @param enmFieldIdx The field index. This must be a string field.
|
---|
1211 | */
|
---|
1212 | USBLIB_DECL(int) USBFilterSetPresentOnly(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx)
|
---|
1213 | {
|
---|
1214 | int rc = usbfilterDeleteAnyStringValue(pFilter, enmFieldIdx);
|
---|
1215 | if (RT_SUCCESS(rc))
|
---|
1216 | {
|
---|
1217 | pFilter->aFields[enmFieldIdx].enmMatch = USBFILTERMATCH_PRESENT;
|
---|
1218 | pFilter->aFields[enmFieldIdx].u16Value = 0;
|
---|
1219 | }
|
---|
1220 | return rc;
|
---|
1221 | }
|
---|
1222 |
|
---|
1223 |
|
---|
1224 | /**
|
---|
1225 | * Sets a field to exactly match a number.
|
---|
1226 | *
|
---|
1227 | * @returns VBox status code.
|
---|
1228 | * @retval VINF_SUCCESS on success.
|
---|
1229 | * @retval VERR_INVALID_PARAMETER if the enmFieldIdx isn't valid.
|
---|
1230 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1231 | *
|
---|
1232 | * @param pFilter The filter.
|
---|
1233 | * @param enmFieldIdx The field index. This must be a string field.
|
---|
1234 | * @param u16Value The string pattern.
|
---|
1235 | * @param fMustBePresent If set, a non-present field on the device will result in a mismatch.
|
---|
1236 | * If clear, a non-present field on the device will match.
|
---|
1237 | */
|
---|
1238 | USBLIB_DECL(int) USBFilterSetNumExact(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx, uint16_t u16Value, bool fMustBePresent)
|
---|
1239 | {
|
---|
1240 | int rc = USBFilterIsNumericField(enmFieldIdx) ? VINF_SUCCESS : VERR_INVALID_PARAMETER;
|
---|
1241 | if (RT_SUCCESS(rc))
|
---|
1242 | {
|
---|
1243 | rc = usbfilterDeleteAnyStringValue(pFilter, enmFieldIdx);
|
---|
1244 | if (RT_SUCCESS(rc))
|
---|
1245 | {
|
---|
1246 | pFilter->aFields[enmFieldIdx].u16Value = u16Value;
|
---|
1247 | pFilter->aFields[enmFieldIdx].enmMatch = fMustBePresent ? USBFILTERMATCH_NUM_EXACT : USBFILTERMATCH_NUM_EXACT_NP;
|
---|
1248 | }
|
---|
1249 | }
|
---|
1250 |
|
---|
1251 | return rc;
|
---|
1252 | }
|
---|
1253 |
|
---|
1254 |
|
---|
1255 | /**
|
---|
1256 | * Sets a field to match a numeric expression.
|
---|
1257 | *
|
---|
1258 | * @returns VBox status code.
|
---|
1259 | * @retval VINF_SUCCESS on success.
|
---|
1260 | * @retval VERR_BUFFER_OVERFLOW if the string table is full.
|
---|
1261 | * @retval VERR_INVALID_PARAMETER if the enmFieldIdx or the numeric expression aren't valid.
|
---|
1262 | * @retval VERR_INVALID_POINTER if pszExpression isn't a valid pointer.
|
---|
1263 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1264 | *
|
---|
1265 | * @param pFilter The filter.
|
---|
1266 | * @param enmFieldIdx The field index. This must be a string field.
|
---|
1267 | * @param pszExpression The numeric expression.
|
---|
1268 | * @param fMustBePresent If set, a non-present field on the device will result in a mismatch.
|
---|
1269 | * If clear, a non-present field on the device will match.
|
---|
1270 | */
|
---|
1271 | USBLIB_DECL(int) USBFilterSetNumExpression(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx, const char *pszExpression, bool fMustBePresent)
|
---|
1272 | {
|
---|
1273 | int rc = USBFilterIsNumericField(enmFieldIdx) ? VINF_SUCCESS : VERR_INVALID_PARAMETER;
|
---|
1274 | if (RT_SUCCESS(rc))
|
---|
1275 | {
|
---|
1276 | /* Strip leading spaces and empty sub expressions (||). */
|
---|
1277 | while (*pszExpression && (RT_C_IS_BLANK(*pszExpression) || *pszExpression == '|'))
|
---|
1278 | pszExpression++;
|
---|
1279 |
|
---|
1280 | rc = usbfilterValidateNumExpression(pszExpression);
|
---|
1281 | if (RT_SUCCESS(rc))
|
---|
1282 | {
|
---|
1283 | /* We could optimize the expression further (stripping spaces, convert numbers),
|
---|
1284 | but it's more work than what it's worth and it could upset some users. */
|
---|
1285 | rc = usbfilterSetString(pFilter, enmFieldIdx, pszExpression, false /*fPurge*/);
|
---|
1286 | if (RT_SUCCESS(rc))
|
---|
1287 | pFilter->aFields[enmFieldIdx].enmMatch = fMustBePresent ? USBFILTERMATCH_NUM_EXPRESSION : USBFILTERMATCH_NUM_EXPRESSION_NP;
|
---|
1288 | else if (rc == VERR_NO_DIGITS)
|
---|
1289 | rc = VERR_INVALID_PARAMETER;
|
---|
1290 | }
|
---|
1291 | }
|
---|
1292 | return rc;
|
---|
1293 | }
|
---|
1294 |
|
---|
1295 |
|
---|
1296 | /**
|
---|
1297 | * Sets a field to exactly match a string.
|
---|
1298 | *
|
---|
1299 | * @returns VBox status code.
|
---|
1300 | * @retval VINF_SUCCESS on success.
|
---|
1301 | * @retval VERR_BUFFER_OVERFLOW if the string table is full.
|
---|
1302 | * @retval VERR_INVALID_PARAMETER if the enmFieldIdx isn't valid.
|
---|
1303 | * @retval VERR_INVALID_POINTER if pszPattern isn't a valid pointer.
|
---|
1304 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1305 | *
|
---|
1306 | * @param pFilter The filter.
|
---|
1307 | * @param enmFieldIdx The field index. This must be a string field.
|
---|
1308 | * @param pszValue The string value.
|
---|
1309 | * @param fMustBePresent If set, a non-present field on the device will result in a mismatch.
|
---|
1310 | * If clear, a non-present field on the device will match.
|
---|
1311 | * @param fPurge Purge invalid UTF-8 encoding and control
|
---|
1312 | * characters before setting it.
|
---|
1313 | */
|
---|
1314 | USBLIB_DECL(int) USBFilterSetStringExact(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx, const char *pszValue,
|
---|
1315 | bool fMustBePresent, bool fPurge)
|
---|
1316 | {
|
---|
1317 | int rc = USBFilterIsStringField(enmFieldIdx) ? VINF_SUCCESS : VERR_INVALID_PARAMETER;
|
---|
1318 | if (RT_SUCCESS(rc))
|
---|
1319 | {
|
---|
1320 | rc = usbfilterSetString(pFilter, enmFieldIdx, pszValue, fPurge);
|
---|
1321 | if (RT_SUCCESS(rc))
|
---|
1322 | pFilter->aFields[enmFieldIdx].enmMatch = fMustBePresent ? USBFILTERMATCH_STR_EXACT : USBFILTERMATCH_STR_EXACT_NP;
|
---|
1323 | }
|
---|
1324 | return rc;
|
---|
1325 | }
|
---|
1326 |
|
---|
1327 |
|
---|
1328 | /**
|
---|
1329 | * Sets a field to match a string pattern.
|
---|
1330 | *
|
---|
1331 | * @returns VBox status code.
|
---|
1332 | * @retval VINF_SUCCESS on success.
|
---|
1333 | * @retval VERR_BUFFER_OVERFLOW if the string table is full.
|
---|
1334 | * @retval VERR_INVALID_PARAMETER if the enmFieldIdx or pattern aren't valid.
|
---|
1335 | * @retval VERR_INVALID_POINTER if pszPattern isn't a valid pointer.
|
---|
1336 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1337 | *
|
---|
1338 | * @param pFilter The filter.
|
---|
1339 | * @param enmFieldIdx The field index. This must be a string field.
|
---|
1340 | * @param pszPattern The string pattern.
|
---|
1341 | * @param fMustBePresent If set, a non-present field on the device will result in a mismatch.
|
---|
1342 | * If clear, a non-present field on the device will match.
|
---|
1343 | */
|
---|
1344 | USBLIB_DECL(int) USBFilterSetStringPattern(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx, const char *pszPattern, bool fMustBePresent)
|
---|
1345 | {
|
---|
1346 | int rc = USBFilterIsStringField(enmFieldIdx) ? VINF_SUCCESS : VERR_INVALID_PARAMETER;
|
---|
1347 | if (RT_SUCCESS(rc))
|
---|
1348 | {
|
---|
1349 | rc = usbfilterValidateStringPattern(pszPattern);
|
---|
1350 | if (RT_SUCCESS(rc))
|
---|
1351 | {
|
---|
1352 | rc = usbfilterSetString(pFilter, enmFieldIdx, pszPattern, false /*fPurge*/);
|
---|
1353 | if (RT_SUCCESS(rc))
|
---|
1354 | pFilter->aFields[enmFieldIdx].enmMatch = fMustBePresent ? USBFILTERMATCH_STR_PATTERN : USBFILTERMATCH_STR_PATTERN_NP;
|
---|
1355 | }
|
---|
1356 | }
|
---|
1357 | return rc;
|
---|
1358 | }
|
---|
1359 |
|
---|
1360 |
|
---|
1361 | /**
|
---|
1362 | * Sets the must-be-present part of a field.
|
---|
1363 | *
|
---|
1364 | * This only works on field which already has matching criteria. This means
|
---|
1365 | * that field marked 'ignore' will not be processed and will result in a
|
---|
1366 | * warning status code.
|
---|
1367 | *
|
---|
1368 | * @returns VBox status code.
|
---|
1369 | * @retval VINF_SUCCESS on success.
|
---|
1370 | * @retval VWRN_INVALID_PARAMETER if the field is marked 'ignore'. No assertions.
|
---|
1371 | * @retval VERR_INVALID_PARAMETER if the enmFieldIdx or pattern aren't valid.
|
---|
1372 | * @retval VERR_INVALID_POINTER if pszPattern isn't a valid pointer.
|
---|
1373 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1374 | *
|
---|
1375 | * @param pFilter The filter.
|
---|
1376 | * @param enmFieldIdx The field index.
|
---|
1377 | * @param fMustBePresent If set, a non-present field on the device will result in a mismatch.
|
---|
1378 | * If clear, a non-present field on the device will match.
|
---|
1379 | */
|
---|
1380 | USBLIB_DECL(int) USBFilterSetMustBePresent(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx, bool fMustBePresent)
|
---|
1381 | {
|
---|
1382 | AssertPtrReturn(pFilter, VERR_INVALID_POINTER);
|
---|
1383 | AssertReturn(pFilter->u32Magic == USBFILTER_MAGIC, VERR_INVALID_MAGIC);
|
---|
1384 | AssertReturn((unsigned)enmFieldIdx < (unsigned)USBFILTERIDX_END, VERR_INVALID_PARAMETER);
|
---|
1385 |
|
---|
1386 | USBFILTERMATCH enmMatch = (USBFILTERMATCH)pFilter->aFields[enmFieldIdx].enmMatch;
|
---|
1387 | if (fMustBePresent)
|
---|
1388 | {
|
---|
1389 | switch (enmMatch)
|
---|
1390 | {
|
---|
1391 | case USBFILTERMATCH_IGNORE:
|
---|
1392 | return VWRN_INVALID_PARAMETER;
|
---|
1393 |
|
---|
1394 | case USBFILTERMATCH_PRESENT:
|
---|
1395 | case USBFILTERMATCH_NUM_EXACT:
|
---|
1396 | case USBFILTERMATCH_NUM_EXPRESSION:
|
---|
1397 | case USBFILTERMATCH_STR_EXACT:
|
---|
1398 | case USBFILTERMATCH_STR_PATTERN:
|
---|
1399 | break;
|
---|
1400 |
|
---|
1401 | case USBFILTERMATCH_NUM_EXACT_NP:
|
---|
1402 | enmMatch = USBFILTERMATCH_NUM_EXACT;
|
---|
1403 | break;
|
---|
1404 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
|
---|
1405 | enmMatch = USBFILTERMATCH_NUM_EXPRESSION;
|
---|
1406 | break;
|
---|
1407 | case USBFILTERMATCH_STR_EXACT_NP:
|
---|
1408 | enmMatch = USBFILTERMATCH_STR_EXACT;
|
---|
1409 | break;
|
---|
1410 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
1411 | enmMatch = USBFILTERMATCH_STR_PATTERN;
|
---|
1412 | break;
|
---|
1413 | default:
|
---|
1414 | AssertMsgFailedReturn(("%p: enmFieldIdx=%d enmMatch=%d\n", pFilter, enmFieldIdx, enmMatch), VERR_INVALID_MAGIC);
|
---|
1415 | }
|
---|
1416 | }
|
---|
1417 | else
|
---|
1418 | {
|
---|
1419 | switch (enmMatch)
|
---|
1420 | {
|
---|
1421 | case USBFILTERMATCH_IGNORE:
|
---|
1422 | return VWRN_INVALID_PARAMETER;
|
---|
1423 |
|
---|
1424 | case USBFILTERMATCH_NUM_EXACT_NP:
|
---|
1425 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
1426 | case USBFILTERMATCH_STR_EXACT_NP:
|
---|
1427 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
|
---|
1428 | break;
|
---|
1429 |
|
---|
1430 | case USBFILTERMATCH_PRESENT:
|
---|
1431 | enmMatch = USBFILTERMATCH_IGNORE;
|
---|
1432 | break;
|
---|
1433 | case USBFILTERMATCH_NUM_EXACT:
|
---|
1434 | enmMatch = USBFILTERMATCH_NUM_EXACT_NP;
|
---|
1435 | break;
|
---|
1436 | case USBFILTERMATCH_NUM_EXPRESSION:
|
---|
1437 | enmMatch = USBFILTERMATCH_NUM_EXPRESSION_NP;
|
---|
1438 | break;
|
---|
1439 | case USBFILTERMATCH_STR_EXACT:
|
---|
1440 | enmMatch = USBFILTERMATCH_STR_EXACT_NP;
|
---|
1441 | break;
|
---|
1442 | case USBFILTERMATCH_STR_PATTERN:
|
---|
1443 | enmMatch = USBFILTERMATCH_STR_PATTERN_NP;
|
---|
1444 | break;
|
---|
1445 |
|
---|
1446 | default:
|
---|
1447 | AssertMsgFailedReturn(("%p: enmFieldIdx=%d enmMatch=%d\n", pFilter, enmFieldIdx, enmMatch), VERR_INVALID_MAGIC);
|
---|
1448 | }
|
---|
1449 | }
|
---|
1450 |
|
---|
1451 | pFilter->aFields[enmFieldIdx].enmMatch = enmMatch;
|
---|
1452 | return VINF_SUCCESS;
|
---|
1453 | }
|
---|
1454 |
|
---|
1455 |
|
---|
1456 | /**
|
---|
1457 | * Gets the filter type.
|
---|
1458 | *
|
---|
1459 | * @returns The filter type.
|
---|
1460 | * USBFILTERTYPE_INVALID if the filter is invalid.
|
---|
1461 | * @param pFilter The filter.
|
---|
1462 | */
|
---|
1463 | USBLIB_DECL(USBFILTERTYPE) USBFilterGetFilterType(PCUSBFILTER pFilter)
|
---|
1464 | {
|
---|
1465 | AssertReturn(pFilter->u32Magic == USBFILTER_MAGIC, USBFILTERTYPE_INVALID);
|
---|
1466 | return pFilter->enmType;
|
---|
1467 | }
|
---|
1468 |
|
---|
1469 |
|
---|
1470 | /**
|
---|
1471 | * Gets the matching method for a field.
|
---|
1472 | *
|
---|
1473 | * @returns The matching method on success, UBFILTERMATCH_INVALID on invalid field index.
|
---|
1474 | * @param pFilter The filter.
|
---|
1475 | * @param enmFieldIdx The field index.
|
---|
1476 | */
|
---|
1477 | USBLIB_DECL(USBFILTERMATCH) USBFilterGetMatchingMethod(PCUSBFILTER pFilter, USBFILTERIDX enmFieldIdx)
|
---|
1478 | {
|
---|
1479 | if ( pFilter->u32Magic == USBFILTER_MAGIC
|
---|
1480 | && (unsigned)enmFieldIdx < (unsigned)USBFILTERIDX_END)
|
---|
1481 | return (USBFILTERMATCH)pFilter->aFields[enmFieldIdx].enmMatch;
|
---|
1482 | return USBFILTERMATCH_INVALID;
|
---|
1483 | }
|
---|
1484 |
|
---|
1485 |
|
---|
1486 | /**
|
---|
1487 | * Gets the numeric value of a field.
|
---|
1488 | *
|
---|
1489 | * The field must contain a number, we're not doing any conversions for you.
|
---|
1490 | *
|
---|
1491 | * @returns VBox status code.
|
---|
1492 | * @retval VINF_SUCCESS on success.
|
---|
1493 | * @retval VERR_INVALID_PARAMETER if the enmFieldIdx isn't valid or if the field doesn't contain a number.
|
---|
1494 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1495 | *
|
---|
1496 | * @param pFilter The filter.
|
---|
1497 | * @param enmFieldIdx The field index.
|
---|
1498 | * @param pu16Value Where to store the value.
|
---|
1499 | */
|
---|
1500 | USBLIB_DECL(int) USBFilterQueryNum(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx, uint16_t *pu16Value)
|
---|
1501 | {
|
---|
1502 | AssertReturn(pFilter->u32Magic == USBFILTER_MAGIC, VERR_INVALID_MAGIC);
|
---|
1503 | int iValue = usbfilterGetNum(pFilter, enmFieldIdx);
|
---|
1504 | if (iValue == -1)
|
---|
1505 | return VERR_INVALID_PARAMETER;
|
---|
1506 | *pu16Value = (uint16_t)iValue;
|
---|
1507 | return VINF_SUCCESS;
|
---|
1508 | }
|
---|
1509 |
|
---|
1510 |
|
---|
1511 | /**
|
---|
1512 | * Gets the numeric value of a field.
|
---|
1513 | *
|
---|
1514 | * The field must contain a number, we're not doing any conversions for you.
|
---|
1515 | *
|
---|
1516 | * @returns The field value on success, -1 on failure (invalid input / not numeric).
|
---|
1517 | *
|
---|
1518 | * @param pFilter The filter.
|
---|
1519 | * @param enmFieldIdx The field index.
|
---|
1520 | */
|
---|
1521 | USBLIB_DECL(int) USBFilterGetNum(PCUSBFILTER pFilter, USBFILTERIDX enmFieldIdx)
|
---|
1522 | {
|
---|
1523 | AssertReturn(pFilter->u32Magic == USBFILTER_MAGIC, -1);
|
---|
1524 | return usbfilterGetNum(pFilter, enmFieldIdx);
|
---|
1525 | }
|
---|
1526 |
|
---|
1527 |
|
---|
1528 | /**
|
---|
1529 | * Gets the string value of a field.
|
---|
1530 | *
|
---|
1531 | * The field must contain a string, we're not doing any conversions for you.
|
---|
1532 | *
|
---|
1533 | * @returns VBox status code.
|
---|
1534 | * @retval VINF_SUCCESS on success.
|
---|
1535 | * @retval VERR_BUFFER_OVERFLOW if the buffer isn't sufficient to hold the string. The buffer
|
---|
1536 | * will be filled with as much of the string that'll fit.
|
---|
1537 | * @retval VERR_INVALID_PARAMETER if the enmFieldIdx isn't valid or if the field doesn't contain a string.
|
---|
1538 | * @retval VERR_INVALID_MAGIC if pFilter is invalid.
|
---|
1539 | *
|
---|
1540 | * @param pFilter The filter.
|
---|
1541 | * @param enmFieldIdx The field index.
|
---|
1542 | * @param pszBuf Where to store the string.
|
---|
1543 | * @param cchBuf The size of the buffer.
|
---|
1544 | */
|
---|
1545 | USBLIB_DECL(int) USBFilterQueryString(PUSBFILTER pFilter, USBFILTERIDX enmFieldIdx, char *pszBuf, size_t cchBuf)
|
---|
1546 | {
|
---|
1547 | AssertReturn(pFilter->u32Magic == USBFILTER_MAGIC, VERR_INVALID_MAGIC);
|
---|
1548 |
|
---|
1549 | const char *psz = usbfilterGetString(pFilter, enmFieldIdx);
|
---|
1550 | if (RT_UNLIKELY(!psz))
|
---|
1551 | return VERR_INVALID_PARAMETER;
|
---|
1552 |
|
---|
1553 | int rc = VINF_SUCCESS;
|
---|
1554 | size_t cch = strlen(psz);
|
---|
1555 | if (cch < cchBuf)
|
---|
1556 | memcpy(pszBuf, psz, cch + 1);
|
---|
1557 | else
|
---|
1558 | {
|
---|
1559 | rc = VERR_BUFFER_OVERFLOW;
|
---|
1560 | if (cchBuf)
|
---|
1561 | {
|
---|
1562 | memcpy(pszBuf, psz, cchBuf - 1);
|
---|
1563 | pszBuf[cchBuf - 1] = '\0';
|
---|
1564 | }
|
---|
1565 | }
|
---|
1566 |
|
---|
1567 | return rc;
|
---|
1568 | }
|
---|
1569 |
|
---|
1570 |
|
---|
1571 | /**
|
---|
1572 | * Gets the string table entry for a field.
|
---|
1573 | *
|
---|
1574 | * @returns Pointer to the string. (readonly!)
|
---|
1575 | *
|
---|
1576 | * @param pFilter The filter.
|
---|
1577 | * @param enmFieldIdx The field index.
|
---|
1578 | */
|
---|
1579 | USBLIB_DECL(const char *) USBFilterGetString(PCUSBFILTER pFilter, USBFILTERIDX enmFieldIdx)
|
---|
1580 | {
|
---|
1581 | AssertReturn(pFilter->u32Magic == USBFILTER_MAGIC, NULL);
|
---|
1582 |
|
---|
1583 | const char *psz = usbfilterGetString(pFilter, enmFieldIdx);
|
---|
1584 | if (RT_UNLIKELY(!psz))
|
---|
1585 | return NULL;
|
---|
1586 | return psz;
|
---|
1587 | }
|
---|
1588 |
|
---|
1589 |
|
---|
1590 | /**
|
---|
1591 | * Gets the string length of a field containing a string.
|
---|
1592 | *
|
---|
1593 | * @returns String length on success, -1 on failure (not a string, bad filter).
|
---|
1594 | * @param pFilter The filter.
|
---|
1595 | * @param enmFieldIdx The field index.
|
---|
1596 | */
|
---|
1597 | USBLIB_DECL(ssize_t) USBFilterGetStringLen(PCUSBFILTER pFilter, USBFILTERIDX enmFieldIdx)
|
---|
1598 | {
|
---|
1599 | if (RT_LIKELY(pFilter->u32Magic == USBFILTER_MAGIC))
|
---|
1600 | {
|
---|
1601 | const char *psz = usbfilterGetString(pFilter, enmFieldIdx);
|
---|
1602 | if (RT_LIKELY(psz))
|
---|
1603 | return strlen(psz);
|
---|
1604 | }
|
---|
1605 | return -1;
|
---|
1606 | }
|
---|
1607 |
|
---|
1608 |
|
---|
1609 | /**
|
---|
1610 | * Check if any of the fields are set to something substatial.
|
---|
1611 | *
|
---|
1612 | * Consider the fileter a wildcard if this returns false.
|
---|
1613 | *
|
---|
1614 | * @returns true / false.
|
---|
1615 | * @param pFilter The filter.
|
---|
1616 | */
|
---|
1617 | USBLIB_DECL(bool) USBFilterHasAnySubstatialCriteria(PCUSBFILTER pFilter)
|
---|
1618 | {
|
---|
1619 | AssertReturn(pFilter->u32Magic == USBFILTER_MAGIC, false);
|
---|
1620 |
|
---|
1621 | for (unsigned i = 0; i < RT_ELEMENTS(pFilter->aFields); i++)
|
---|
1622 | {
|
---|
1623 | switch (pFilter->aFields[i].enmMatch)
|
---|
1624 | {
|
---|
1625 | case USBFILTERMATCH_IGNORE:
|
---|
1626 | case USBFILTERMATCH_PRESENT:
|
---|
1627 | break;
|
---|
1628 |
|
---|
1629 | case USBFILTERMATCH_NUM_EXACT:
|
---|
1630 | case USBFILTERMATCH_NUM_EXACT_NP:
|
---|
1631 | case USBFILTERMATCH_STR_EXACT:
|
---|
1632 | case USBFILTERMATCH_STR_EXACT_NP:
|
---|
1633 | return true;
|
---|
1634 |
|
---|
1635 | case USBFILTERMATCH_NUM_EXPRESSION:
|
---|
1636 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
|
---|
1637 | {
|
---|
1638 | const char *psz = usbfilterGetString(pFilter, (USBFILTERIDX)i);
|
---|
1639 | if (psz)
|
---|
1640 | {
|
---|
1641 | while (*psz && (*psz == '|' || RT_C_IS_BLANK(*psz)))
|
---|
1642 | psz++;
|
---|
1643 | if (*psz)
|
---|
1644 | return true;
|
---|
1645 | }
|
---|
1646 | break;
|
---|
1647 | }
|
---|
1648 |
|
---|
1649 | case USBFILTERMATCH_STR_PATTERN:
|
---|
1650 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
1651 | {
|
---|
1652 | const char *psz = usbfilterGetString(pFilter, (USBFILTERIDX)i);
|
---|
1653 | if (psz)
|
---|
1654 | {
|
---|
1655 | while (*psz && (*psz == '*' || *psz == '?'))
|
---|
1656 | psz++;
|
---|
1657 | if (*psz)
|
---|
1658 | return true;
|
---|
1659 | }
|
---|
1660 | break;
|
---|
1661 | }
|
---|
1662 | }
|
---|
1663 | }
|
---|
1664 |
|
---|
1665 | return false;
|
---|
1666 | }
|
---|
1667 |
|
---|
1668 |
|
---|
1669 |
|
---|
1670 | /**
|
---|
1671 | * Checks whether the specified field is a numeric field or not.
|
---|
1672 | *
|
---|
1673 | * @returns true / false.
|
---|
1674 | * @param enmFieldIdx The field index.
|
---|
1675 | */
|
---|
1676 | USBLIB_DECL(bool) USBFilterIsNumericField(USBFILTERIDX enmFieldIdx)
|
---|
1677 | {
|
---|
1678 | switch (enmFieldIdx)
|
---|
1679 | {
|
---|
1680 | case USBFILTERIDX_VENDOR_ID:
|
---|
1681 | case USBFILTERIDX_PRODUCT_ID:
|
---|
1682 | case USBFILTERIDX_DEVICE:
|
---|
1683 | case USBFILTERIDX_DEVICE_CLASS:
|
---|
1684 | case USBFILTERIDX_DEVICE_SUB_CLASS:
|
---|
1685 | case USBFILTERIDX_DEVICE_PROTOCOL:
|
---|
1686 | case USBFILTERIDX_BUS:
|
---|
1687 | case USBFILTERIDX_PORT:
|
---|
1688 | return true;
|
---|
1689 |
|
---|
1690 | default:
|
---|
1691 | AssertMsgFailed(("%d\n", enmFieldIdx));
|
---|
1692 | RT_FALL_THRU();
|
---|
1693 | case USBFILTERIDX_MANUFACTURER_STR:
|
---|
1694 | case USBFILTERIDX_PRODUCT_STR:
|
---|
1695 | case USBFILTERIDX_SERIAL_NUMBER_STR:
|
---|
1696 | return false;
|
---|
1697 | }
|
---|
1698 | }
|
---|
1699 |
|
---|
1700 |
|
---|
1701 | /**
|
---|
1702 | * Checks whether the specified field is a string field or not.
|
---|
1703 | *
|
---|
1704 | * @returns true / false.
|
---|
1705 | * @param enmFieldIdx The field index.
|
---|
1706 | */
|
---|
1707 | USBLIB_DECL(bool) USBFilterIsStringField(USBFILTERIDX enmFieldIdx)
|
---|
1708 | {
|
---|
1709 | switch (enmFieldIdx)
|
---|
1710 | {
|
---|
1711 | default:
|
---|
1712 | AssertMsgFailed(("%d\n", enmFieldIdx));
|
---|
1713 | RT_FALL_THRU();
|
---|
1714 | case USBFILTERIDX_VENDOR_ID:
|
---|
1715 | case USBFILTERIDX_PRODUCT_ID:
|
---|
1716 | case USBFILTERIDX_DEVICE:
|
---|
1717 | case USBFILTERIDX_DEVICE_CLASS:
|
---|
1718 | case USBFILTERIDX_DEVICE_SUB_CLASS:
|
---|
1719 | case USBFILTERIDX_DEVICE_PROTOCOL:
|
---|
1720 | case USBFILTERIDX_BUS:
|
---|
1721 | case USBFILTERIDX_PORT:
|
---|
1722 | return false;
|
---|
1723 |
|
---|
1724 | case USBFILTERIDX_MANUFACTURER_STR:
|
---|
1725 | case USBFILTERIDX_PRODUCT_STR:
|
---|
1726 | case USBFILTERIDX_SERIAL_NUMBER_STR:
|
---|
1727 | return true;
|
---|
1728 | }
|
---|
1729 | }
|
---|
1730 |
|
---|
1731 |
|
---|
1732 | /**
|
---|
1733 | * Checks whether the specified matching method uses a numeric value or not.
|
---|
1734 | *
|
---|
1735 | * @returns true / false.
|
---|
1736 | * @param enmMatchingMethod The matching method.
|
---|
1737 | */
|
---|
1738 | USBLIB_DECL(bool) USBFilterIsMethodUsingNumericValue(USBFILTERMATCH enmMatchingMethod)
|
---|
1739 | {
|
---|
1740 | switch (enmMatchingMethod)
|
---|
1741 | {
|
---|
1742 | default:
|
---|
1743 | AssertMsgFailed(("%d\n", enmMatchingMethod));
|
---|
1744 | RT_FALL_THRU();
|
---|
1745 | case USBFILTERMATCH_IGNORE:
|
---|
1746 | case USBFILTERMATCH_PRESENT:
|
---|
1747 | case USBFILTERMATCH_NUM_EXPRESSION:
|
---|
1748 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
|
---|
1749 | case USBFILTERMATCH_STR_EXACT:
|
---|
1750 | case USBFILTERMATCH_STR_EXACT_NP:
|
---|
1751 | case USBFILTERMATCH_STR_PATTERN:
|
---|
1752 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
1753 | return false;
|
---|
1754 |
|
---|
1755 | case USBFILTERMATCH_NUM_EXACT:
|
---|
1756 | case USBFILTERMATCH_NUM_EXACT_NP:
|
---|
1757 | return true;
|
---|
1758 | }
|
---|
1759 | }
|
---|
1760 |
|
---|
1761 |
|
---|
1762 | /**
|
---|
1763 | * Checks whether the specified matching method uses a string value or not.
|
---|
1764 | *
|
---|
1765 | * @returns true / false.
|
---|
1766 | * @param enmMatchingMethod The matching method.
|
---|
1767 | */
|
---|
1768 | USBLIB_DECL(bool) USBFilterIsMethodUsingStringValue(USBFILTERMATCH enmMatchingMethod)
|
---|
1769 | {
|
---|
1770 | switch (enmMatchingMethod)
|
---|
1771 | {
|
---|
1772 | default:
|
---|
1773 | AssertMsgFailed(("%d\n", enmMatchingMethod));
|
---|
1774 | RT_FALL_THRU();
|
---|
1775 | case USBFILTERMATCH_IGNORE:
|
---|
1776 | case USBFILTERMATCH_PRESENT:
|
---|
1777 | case USBFILTERMATCH_NUM_EXACT:
|
---|
1778 | case USBFILTERMATCH_NUM_EXACT_NP:
|
---|
1779 | return false;
|
---|
1780 |
|
---|
1781 | case USBFILTERMATCH_NUM_EXPRESSION:
|
---|
1782 | case USBFILTERMATCH_NUM_EXPRESSION_NP:
|
---|
1783 | case USBFILTERMATCH_STR_EXACT:
|
---|
1784 | case USBFILTERMATCH_STR_EXACT_NP:
|
---|
1785 | case USBFILTERMATCH_STR_PATTERN:
|
---|
1786 | case USBFILTERMATCH_STR_PATTERN_NP:
|
---|
1787 | return true;
|
---|
1788 | }
|
---|
1789 | }
|
---|
1790 |
|
---|
1791 |
|
---|
1792 | /**
|
---|
1793 | * Checks if a matching method is for string fields or not.
|
---|
1794 | *
|
---|
1795 | * @returns true / false.
|
---|
1796 | * @param enmMatchingMethod The matching method.
|
---|
1797 | */
|
---|
1798 | USBLIB_DECL(bool) USBFilterIsMethodNumeric(USBFILTERMATCH enmMatchingMethod)
|
---|
1799 | {
|
---|
1800 | return enmMatchingMethod >= USBFILTERMATCH_NUM_FIRST
|
---|
1801 | && enmMatchingMethod <= USBFILTERMATCH_NUM_LAST;
|
---|
1802 | }
|
---|
1803 |
|
---|
1804 | /**
|
---|
1805 | * Checks if a matching method is for string fields or not.
|
---|
1806 | *
|
---|
1807 | * @returns true / false.
|
---|
1808 | * @param enmMatchingMethod The matching method.
|
---|
1809 | */
|
---|
1810 | USBLIB_DECL(bool) USBFilterIsMethodString(USBFILTERMATCH enmMatchingMethod)
|
---|
1811 | {
|
---|
1812 | return enmMatchingMethod >= USBFILTERMATCH_STR_FIRST
|
---|
1813 | && enmMatchingMethod <= USBFILTERMATCH_STR_LAST;
|
---|
1814 | }
|
---|
1815 |
|
---|