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annotate ffstools/tiffs-rd/inode.c @ 232:73372cfdaf7f

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tiffs IVA: object name validation implemented
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 26 Jan 2014 08:42:59 +0000
parents 5ceacdbd4490
children ae9ff2d1e3da
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
231
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1 /*
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2 * This C module implements the reading and decoding of inode information.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <endian.h>
232
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7 #include <ctype.h>
231
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include "types.h"
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13 #include "struct.h"
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14 #include "globals.h"
232
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15 #include "pathname.h"
231
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16
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17 u8 blank_flash_line[16] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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18 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
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19
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20 alloc_inode_table()
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21 {
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22 inode_info = malloc(sizeof(struct inode_info *) * inode_limit);
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23 if (!inode_info) {
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24 perror("malloc of inode table");
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25 exit(1);
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26 }
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27 bzero(inode_info, sizeof(struct inode_info *) * inode_limit);
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28 }
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29
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30 static int
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31 convert_ptr(in, infp)
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32 int in;
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33 int *infp;
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34 {
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35 if (in == 0xFFFF) {
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36 *infp = 0;
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37 return(0);
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38 }
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39 if (in < 1 || in >= inode_limit)
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40 return(-1);
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41 *infp = in;
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42 return(1);
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43 }
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44
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45 validate_inode(ino)
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46 {
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47 struct inode_flash *fl;
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48 struct inode_info *inf;
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49
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50 if (ino < 1 || ino >= inode_limit)
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51 return(0);
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52 if (inode_info[ino])
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53 return(1);
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54 fl = (struct inode_flash *)inode_block + ino;
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55 if (!bcmp(fl, blank_flash_line, sizeof blank_flash_line))
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56 return(0);
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57 inf = malloc(sizeof(struct inode_info));
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58 if (!inf) {
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59 perror("malloc of struct inode_info");
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60 exit(1);
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61 }
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62 bzero(inf, sizeof(struct inode_info));
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63 inf->len = le16toh(fl->len);
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64 if (inf->len & 0xF) {
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65 fprintf(stderr,
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66 "warning: inode #%x: invalid length, skipping\n", ino);
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67 free(inf);
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68 return(0);
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69 }
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70 inf->type = fl->type;
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71 switch (inf->type) {
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72 case 0x00:
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73 break;
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74 case 0xE1:
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75 case 0xF1:
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76 case 0xF2:
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77 case 0xF3:
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78 case 0xF4:
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79 if (!inf->len) {
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80 fprintf(stderr,
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81 "warning: inode #%x: non-deleted object has zero length, skipping\n",
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82 ino);
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83 free(inf);
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84 return(0);
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85 }
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86 break;
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87 default:
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88 fprintf(stderr,
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89 "warning: inode #%x: unexpected object type %02X, skipping\n",
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90 ino, inf->type);
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91 free(inf);
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92 return(0);
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93 }
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94 if (convert_ptr(le16toh(fl->descend), &inf->descend) < 0) {
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95 fprintf(stderr,
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96 "warning: inode #%x: invalid descend pointer, skipping\n",
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97 ino);
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98 free(inf);
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99 return(0);
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100 }
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101 if (convert_ptr(le16toh(fl->sibling), &inf->sibling) < 0) {
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102 fprintf(stderr,
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103 "warning: inode #%x: invalid sibling pointer, skipping\n",
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104 ino);
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105 free(inf);
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106 return(0);
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107 }
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108 if (inf->len) {
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109 inf->rawloc = le32toh(fl->dataptr);
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110 if (inf->rawloc > 0x0FFFFFFF) {
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111 invdptr: fprintf(stderr,
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112 "warning: inode #%x: invalid data pointer, skipping\n",
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113 ino);
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114 free(inf);
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115 return(0);
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116 }
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117 inf->offset = inf->rawloc << 4;
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118 if (inf->offset >= total_ffs_size)
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119 goto invdptr;
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120 if (inf->offset + inf->len > total_ffs_size) {
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121 fprintf(stderr,
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122 "warning: inode #%x: data pointer + length > FFS total size, skipping\n",
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123 ino);
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124 free(inf);
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125 return(0);
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126 }
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127 inf->dataptr = image + inf->offset;
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128 }
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129 inode_info[ino] = inf;
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130 return(1);
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131 }
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132
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133 find_root_inode()
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134 {
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135 int ino;
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136
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137 if (root_inode) {
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138 if (!validate_inode(root_inode)) {
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139 fprintf(stderr,
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140 "error: root inode specified with -r is invalid\n");
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parents:
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141 exit(1);
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
142 }
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
143 return(1);
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
144 }
5ceacdbd4490 tiffs IVA: finds the root inode
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parents:
diff changeset
145 for (ino = 1; ino < inode_limit; ino++) {
5ceacdbd4490 tiffs IVA: finds the root inode
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parents:
diff changeset
146 if (!validate_inode(ino))
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
147 continue;
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
148 if (inode_info[ino]->type != 0xF2)
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
149 continue;
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
150 if (*inode_info[ino]->dataptr != '/')
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
151 continue;
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
152 root_inode = ino;
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
153 if (verbose)
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
154 fprintf(stderr, "Found root inode at #%x\n", ino);
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
155 if (inode_info[ino]->sibling)
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
156 fprintf(stderr,
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
157 "warning: root inode #%x has a non-null sibling pointer\n",
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
158 ino);
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
159 return(0);
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
160 }
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
161 fprintf(stderr, "error: no root inode found; try -r\n");
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
162 exit(1);
5ceacdbd4490 tiffs IVA: finds the root inode
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
163 }
232
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
164
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
165 validate_obj_name(ino, root_special)
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
166 {
73372cfdaf7f tiffs IVA: object name validation implemented
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parents: 231
diff changeset
167 struct inode_info *inf = inode_info[ino];
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
168 u8 *p, *endp;
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
169 int c;
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
170
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
171 if (!inf->len)
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
172 return(0);
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
173 p = inf->dataptr;
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
174 endp = p + inf->len;
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
175 for (; ; p++) {
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
176 if (p >= endp)
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
177 return(0);
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
178 c = *p;
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
179 if (!c)
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
180 break;
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
181 if (c < ' ' || c > '~')
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
182 return(0);
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
183 if (root_special || isalnum(c))
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
184 continue;
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
185 switch (c) {
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
186 case '.':
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
187 case ',':
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
188 case '_':
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
189 case '-':
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
190 case '+':
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
191 case '%':
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
192 case '$':
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
193 case '#':
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
194 continue;
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
195 default:
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
196 return(0);
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
197 }
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
198 }
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
199 c = p - inf->dataptr;
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
200 if (c < 1 || c > MAX_FN_COMPONENT && !root_special)
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
201 return(0);
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
202 inf->byte_after_name = p + 1;
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
203 return(1);
73372cfdaf7f tiffs IVA: object name validation implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 231
diff changeset
204 }