Mercurial > hg > nginx
annotate src/http/ngx_http_cache.h @ 9322:d6f75dd66761 default tip
Mp4: added and updated sanity checks for "end" handling.
When handling incorrect data in ngx_http_mp4_crop_stsc_data(),
trak->end_chunk_samples might end up being arbitrary large, leading
to reading before the buffer in ngx_http_mp4_update_stsz_atom(). Fix
is to check that trak->end_chunk_samples corresponds to a memory within
the stsz atom data. For consistency, trak->start_chunk_samples
is checked similarly.
Similarly, trak->end_chunk might end up being smaller than trak->start_chunk,
leading to reading memory after the buffer in ngx_http_mp4_update_stco_atom()
and ngx_http_mp4_update_co64_atom(). Corresponding checks are updated
to explicitly test (trak->end_chunk - trak->start_chunk) instead of just
checking trak->end_chunk and assuming it is larger than trak->start_chunk.
This is generally in line with existing checks of
(trak->end_sample - trak->start_sample) in ngx_http_mp4_update_stsz_atom(),
where trak->end_sample might also become smaller than trak->start_sample
when handling incorrect data in ngx_http_mp4_crop_stts_data().
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Sun, 25 Aug 2024 06:35:40 +0300 |
parents | 3781de64e747 |
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rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #ifndef _NGX_HTTP_CACHE_H_INCLUDED_ |
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9 #define _NGX_HTTP_CACHE_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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14 #include <ngx_http.h> |
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18 #define NGX_HTTP_CACHE_BYPASS 2 |
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19 #define NGX_HTTP_CACHE_EXPIRED 3 |
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20 #define NGX_HTTP_CACHE_STALE 4 |
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21 #define NGX_HTTP_CACHE_UPDATING 5 |
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22 #define NGX_HTTP_CACHE_REVALIDATED 6 |
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23 #define NGX_HTTP_CACHE_HIT 7 |
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24 #define NGX_HTTP_CACHE_SCARCE 8 |
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25 |
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26 #define NGX_HTTP_CACHE_KEY_LEN 16 |
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27 #define NGX_HTTP_CACHE_ETAG_LEN 128 |
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28 #define NGX_HTTP_CACHE_VARY_LEN 128 |
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29 |
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30 #define NGX_HTTP_CACHE_VERSION 5 |
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33 typedef struct { |
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34 ngx_uint_t status; |
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35 time_t valid; |
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36 } ngx_http_cache_valid_t; |
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37 |
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38 |
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39 typedef struct { |
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40 ngx_rbtree_node_t node; |
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41 ngx_queue_t queue; |
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42 |
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43 u_char key[NGX_HTTP_CACHE_KEY_LEN |
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44 - sizeof(ngx_rbtree_key_t)]; |
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45 |
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46 unsigned count:20; |
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47 unsigned uses:10; |
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48 unsigned valid_msec:10; |
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49 unsigned error:10; |
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50 unsigned exists:1; |
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51 unsigned updating:1; |
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52 unsigned deleting:1; |
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53 unsigned purged:1; |
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54 /* 10 unused bits */ |
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55 |
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56 ngx_file_uniq_t uniq; |
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57 time_t expire; |
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58 time_t valid_sec; |
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59 size_t body_start; |
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60 off_t fs_size; |
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61 ngx_msec_t lock_time; |
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62 } ngx_http_file_cache_node_t; |
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63 |
469 | 64 |
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65 struct ngx_http_cache_s { |
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66 ngx_file_t file; |
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67 ngx_array_t keys; |
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68 uint32_t crc32; |
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69 u_char key[NGX_HTTP_CACHE_KEY_LEN]; |
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70 u_char main[NGX_HTTP_CACHE_KEY_LEN]; |
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71 |
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72 ngx_file_uniq_t uniq; |
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73 time_t valid_sec; |
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74 time_t updating_sec; |
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75 time_t error_sec; |
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76 time_t last_modified; |
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77 time_t date; |
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78 |
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79 ngx_str_t etag; |
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80 ngx_str_t vary; |
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81 u_char variant[NGX_HTTP_CACHE_KEY_LEN]; |
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82 |
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83 size_t buffer_size; |
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84 size_t header_start; |
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85 size_t body_start; |
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86 off_t length; |
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87 off_t fs_size; |
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88 |
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89 ngx_uint_t min_uses; |
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90 ngx_uint_t error; |
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91 ngx_uint_t valid_msec; |
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92 ngx_uint_t vary_tag; |
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93 |
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94 ngx_buf_t *buf; |
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95 |
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96 ngx_http_file_cache_t *file_cache; |
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97 ngx_http_file_cache_node_t *node; |
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98 |
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99 #if (NGX_THREADS || NGX_COMPAT) |
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100 ngx_thread_task_t *thread_task; |
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101 #endif |
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102 |
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103 ngx_msec_t lock_timeout; |
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104 ngx_msec_t lock_age; |
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105 ngx_msec_t lock_time; |
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106 ngx_msec_t wait_time; |
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107 |
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108 ngx_event_t wait_event; |
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109 |
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110 unsigned lock:1; |
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111 unsigned waiting:1; |
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112 |
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113 unsigned updated:1; |
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114 unsigned updating:1; |
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115 unsigned exists:1; |
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116 unsigned temp_file:1; |
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117 unsigned purged:1; |
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118 unsigned reading:1; |
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119 unsigned secondary:1; |
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120 unsigned update_variant:1; |
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121 unsigned background:1; |
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122 |
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123 unsigned stale_updating:1; |
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124 unsigned stale_error:1; |
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125 }; |
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126 |
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127 |
473 | 128 typedef struct { |
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129 ngx_uint_t version; |
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130 time_t valid_sec; |
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131 time_t updating_sec; |
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132 time_t error_sec; |
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133 time_t last_modified; |
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134 time_t date; |
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135 uint32_t crc32; |
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136 u_short valid_msec; |
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137 u_short header_start; |
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138 u_short body_start; |
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139 u_char etag_len; |
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140 u_char etag[NGX_HTTP_CACHE_ETAG_LEN]; |
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141 u_char vary_len; |
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142 u_char vary[NGX_HTTP_CACHE_VARY_LEN]; |
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143 u_char variant[NGX_HTTP_CACHE_KEY_LEN]; |
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144 } ngx_http_file_cache_header_t; |
477 | 145 |
146 | |
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147 typedef struct { |
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148 ngx_rbtree_t rbtree; |
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149 ngx_rbtree_node_t sentinel; |
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150 ngx_queue_t queue; |
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151 ngx_atomic_t cold; |
3018 | 152 ngx_atomic_t loading; |
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153 off_t size; |
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154 ngx_uint_t count; |
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155 ngx_uint_t watermark; |
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156 } ngx_http_file_cache_sh_t; |
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157 |
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158 |
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159 struct ngx_http_file_cache_s { |
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160 ngx_http_file_cache_sh_t *sh; |
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161 ngx_slab_pool_t *shpool; |
469 | 162 |
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163 ngx_path_t *path; |
201
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164 |
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165 off_t min_free; |
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166 off_t max_size; |
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167 size_t bsize; |
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168 |
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169 time_t inactive; |
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170 |
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171 time_t fail_time; |
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172 |
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173 ngx_uint_t files; |
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174 ngx_uint_t loader_files; |
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175 ngx_msec_t last; |
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176 ngx_msec_t loader_sleep; |
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177 ngx_msec_t loader_threshold; |
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178 |
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179 ngx_uint_t manager_files; |
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180 ngx_msec_t manager_sleep; |
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181 ngx_msec_t manager_threshold; |
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182 |
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183 ngx_shm_zone_t *shm_zone; |
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184 |
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185 ngx_uint_t use_temp_path; |
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186 /* unsigned use_temp_path:1 */ |
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187 }; |
200
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188 |
197
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189 |
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190 ngx_int_t ngx_http_file_cache_new(ngx_http_request_t *r); |
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191 ngx_int_t ngx_http_file_cache_create(ngx_http_request_t *r); |
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192 void ngx_http_file_cache_create_key(ngx_http_request_t *r); |
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193 ngx_int_t ngx_http_file_cache_open(ngx_http_request_t *r); |
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194 ngx_int_t ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf); |
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195 void ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf); |
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196 void ngx_http_file_cache_update_header(ngx_http_request_t *r); |
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197 ngx_int_t ngx_http_cache_send(ngx_http_request_t *); |
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198 void ngx_http_file_cache_free(ngx_http_cache_t *c, ngx_temp_file_t *tf); |
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199 time_t ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t status); |
199
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200 |
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201 char *ngx_http_file_cache_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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202 void *conf); |
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203 char *ngx_http_file_cache_valid_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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204 void *conf); |
469 | 205 |
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206 |
2952 | 207 extern ngx_str_t ngx_http_cache_status[]; |
208 | |
199
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209 |
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210 #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */ |