OpenWrt – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | /* |
2 | * asustrx |
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3 | * |
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4 | * Copyright (C) 2015 Rafał Miłecki <zajec5@gmail.com> |
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5 | * |
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6 | * This program is free software; you can redistribute it and/or modify it |
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7 | * under the terms of the GNU General Public License as published by the Free |
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8 | * Software Foundation; either version 2 of the License, or (at your option) |
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9 | * any later version. |
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10 | */ |
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11 | |||
12 | #include <byteswap.h> |
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13 | #include <errno.h> |
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14 | #include <stdint.h> |
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15 | #include <stdio.h> |
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16 | #include <stdlib.h> |
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17 | #include <string.h> |
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18 | #include <unistd.h> |
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19 | |||
20 | #if __BYTE_ORDER == __BIG_ENDIAN |
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21 | #define cpu_to_le32(x) bswap_32(x) |
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22 | #define le32_to_cpu(x) bswap_32(x) |
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23 | #elif __BYTE_ORDER == __LITTLE_ENDIAN |
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24 | #define cpu_to_le32(x) (x) |
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25 | #define le32_to_cpu(x) (x) |
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26 | #else |
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27 | #error "Unsupported endianness" |
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28 | #endif |
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29 | |||
30 | #define TRX_MAGIC 0x30524448 |
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31 | #define TRX_FLAGS_OFFSET 12 |
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32 | |||
33 | struct trx_header { |
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34 | uint32_t magic; |
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35 | uint32_t length; |
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36 | uint32_t crc32; |
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37 | uint16_t flags; |
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38 | uint16_t version; |
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39 | uint32_t offset[3]; |
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40 | }; |
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41 | |||
42 | struct asustrx_tail { |
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43 | uint8_t version[4]; |
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44 | char productid[12]; |
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45 | uint8_t unused[48]; |
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46 | }; |
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47 | |||
48 | char *in_path = NULL; |
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49 | char *out_path = NULL; |
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50 | char *productid = NULL; |
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51 | uint8_t version[4] = { }; |
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52 | |||
53 | static const uint32_t crc32_tbl[] = { |
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54 | 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, |
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55 | 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, |
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56 | 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, |
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57 | 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, |
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58 | 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, |
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59 | 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, |
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60 | 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, |
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61 | 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, |
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62 | 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, |
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63 | 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, |
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64 | 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, |
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65 | 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, |
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66 | 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, |
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67 | 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, |
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68 | 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, |
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69 | 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, |
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70 | 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, |
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71 | 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, |
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72 | 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, |
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73 | 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, |
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74 | 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, |
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75 | 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, |
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76 | 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, |
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77 | 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, |
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78 | 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, |
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79 | 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, |
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80 | 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, |
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81 | 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, |
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82 | 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, |
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83 | 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, |
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84 | 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, |
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85 | 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, |
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86 | 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, |
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87 | 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, |
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88 | 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, |
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89 | 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, |
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90 | 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, |
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91 | 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, |
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92 | 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, |
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93 | 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, |
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94 | 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, |
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95 | 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, |
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96 | 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, |
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97 | 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, |
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98 | 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, |
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99 | 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, |
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100 | 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, |
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101 | 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, |
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102 | 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, |
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103 | 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, |
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104 | 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, |
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105 | 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, |
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106 | 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, |
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107 | 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, |
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108 | 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, |
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109 | 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, |
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110 | 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, |
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111 | 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, |
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112 | 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, |
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113 | 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, |
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114 | 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, |
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115 | 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, |
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116 | 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, |
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117 | 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, |
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118 | }; |
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119 | |||
120 | static void parse_options(int argc, char **argv) { |
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121 | int c; |
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122 | |||
123 | while ((c = getopt(argc, argv, "i:o:p:v:")) != -1) { |
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124 | switch (c) { |
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125 | case 'i': |
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126 | in_path = optarg; |
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127 | break; |
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128 | case 'o': |
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129 | out_path = optarg; |
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130 | break; |
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131 | case 'p': |
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132 | productid = optarg; |
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133 | break; |
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134 | case 'v': |
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135 | if (sscanf(optarg, "%hu.%hu.%hu.%hu", &version[0], &version[1], &version[2], &version[3]) != 4) |
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136 | fprintf(stderr, "Version %s doesn't match suppored 4-digits format\n", optarg); |
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137 | break; |
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138 | } |
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139 | } |
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140 | } |
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141 | |||
142 | static void usage() { |
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143 | printf("Usage:\n"); |
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144 | printf("\t-i file\t\t\t\tinput TRX file\n"); |
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145 | printf("\t-o file\t\t\t\toutput Asus TRX file\n"); |
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146 | printf("\t-p productid\t\t\tproduct (device) ID\n"); |
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147 | printf("\t-v version\t\t\tfirmware version formatted with 4 digits like: 1.2.3.4\n"); |
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148 | } |
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149 | |||
150 | int main(int argc, char **argv) { |
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151 | struct trx_header hdr; |
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152 | struct asustrx_tail tail = { }; |
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153 | FILE *in, *out; |
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154 | uint8_t buf[1024]; |
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155 | size_t bytes; |
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156 | size_t length = 0; |
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157 | uint32_t crc32 = 0xffffffff; |
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158 | int i; |
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159 | int err = 0; |
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160 | |||
161 | /* Parse & validate arguments */ |
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162 | parse_options(argc, argv); |
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163 | if (!in_path || !out_path || !productid) { |
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164 | usage(); |
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165 | err = -EINVAL; |
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166 | goto err; |
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167 | } |
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168 | |||
169 | /* Fill Asus tail */ |
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170 | tail.version[0] = version[0]; |
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171 | tail.version[1] = version[1]; |
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172 | tail.version[2] = version[2]; |
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173 | tail.version[3] = version[3]; |
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174 | strncpy(tail.productid, productid, sizeof(tail.productid)); |
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175 | |||
176 | /* Open files */ |
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177 | in = fopen(in_path, "r"); |
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178 | if (!in) { |
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179 | fprintf(stderr, "Couldn't open %s\n", in_path); |
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180 | err = -EIO; |
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181 | goto err; |
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182 | } |
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183 | out = fopen(out_path, "w+"); |
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184 | if (!out) { |
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185 | fprintf(stderr, "Couldn't open %s\n", out_path); |
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186 | err = -EIO; |
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187 | goto err; |
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188 | } |
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189 | |||
190 | /* Check is there is empty place for Asus tail */ |
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191 | bytes = sizeof(struct asustrx_tail); |
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192 | fseek(in, -bytes, SEEK_END); |
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193 | if (fread(buf, 1, bytes, in) != bytes) { |
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194 | fprintf(stderr, "Couldn't read %zu B from %s\n", bytes, in_path); |
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195 | err = -EIO; |
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196 | goto err; |
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197 | } |
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198 | for (i = 0; i < bytes; i++) { |
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199 | if (buf[i]) { |
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200 | fprintf(stderr, "Input TRX doesn't have last 64 B empty %s\n", out_path); |
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201 | err = -ENOSPC; |
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202 | goto err; |
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203 | } |
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204 | } |
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205 | |||
206 | /* Copy whole TRX */ |
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207 | rewind(in); |
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208 | while ((bytes = fread(buf, 1, sizeof(buf), in)) > 0) { |
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209 | if (fwrite(buf, 1, bytes, out) != bytes) { |
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210 | fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, out_path); |
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211 | err = -EIO; |
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212 | goto err; |
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213 | } |
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214 | } |
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215 | |||
216 | /* Overwrite last 64 B with Asus tail */ |
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217 | bytes = sizeof(tail); |
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218 | fseek(out, -bytes, SEEK_CUR); |
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219 | if (fwrite(&tail, 1, bytes, out) != bytes) { |
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220 | fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, out_path); |
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221 | err = -EIO; |
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222 | goto err; |
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223 | } |
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224 | |||
225 | /* Calculate crc32 */ |
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226 | fseek(out, TRX_FLAGS_OFFSET, SEEK_SET); |
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227 | length = TRX_FLAGS_OFFSET; |
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228 | while ((bytes = fread(buf, 1, sizeof(buf), out )) > 0) { |
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229 | length += bytes; |
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230 | for (i = 0; i < bytes; i++) |
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231 | crc32 = crc32_tbl[(crc32 ^ buf[i]) & 0xff] ^ (crc32 >> 8); |
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232 | } |
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233 | |||
234 | /* Update header */ |
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235 | bytes = sizeof(hdr); |
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236 | rewind(out); |
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237 | if (fread(&hdr, 1, sizeof(hdr), out) != bytes) { |
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238 | fprintf(stderr, "Couldn't read %zu B from %s\n", bytes, in_path); |
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239 | err = -EIO; |
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240 | goto err; |
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241 | } |
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242 | hdr.crc32 = cpu_to_le32(crc32); |
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243 | rewind(out); |
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244 | if (fwrite(&hdr, 1, bytes, out) != bytes) { |
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245 | fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, out_path); |
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246 | err = -EIO; |
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247 | goto err; |
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248 | } |
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249 | |||
250 | err: |
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251 | if (out) |
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252 | fclose(out); |
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253 | if (in) |
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254 | fclose(in); |
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255 | return err; |
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256 | } |