Mercurial > hg > nginx
annotate src/core/ngx_buf.h @ 8794:ba5977b38b2e quic
HTTP/3: reordered H3_MISSING_SETTINGS and H3_FRAME_UNEXPECTED.
The quic-http-34 is ambiguous as to what error should be generated for the
first frame in control stream:
Each side MUST initiate a single control stream at the beginning of
the connection and send its SETTINGS frame as the first frame on this
stream. If the first frame of the control stream is any other frame
type, this MUST be treated as a connection error of type
H3_MISSING_SETTINGS.
If a DATA frame is received on a control stream, the recipient MUST
respond with a connection error of type H3_FRAME_UNEXPECTED.
If a HEADERS frame is received on a control stream, the recipient MUST
respond with a connection error of type H3_FRAME_UNEXPECTED.
Previously, H3_FRAME_UNEXPECTED had priority, but now H3_MISSING_SETTINGS has.
The arguments in the spec sound more compelling for H3_MISSING_SETTINGS.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Fri, 11 Jun 2021 10:56:51 +0300 |
parents | 2f9214713666 |
children | ec2e6893caaa |
rev | line source |
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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. |
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5 */ |
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8 #ifndef _NGX_BUF_H_INCLUDED_ |
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9 #define _NGX_BUF_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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16 typedef void * ngx_buf_tag_t; |
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17 |
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18 typedef struct ngx_buf_s ngx_buf_t; |
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19 |
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20 struct ngx_buf_s { |
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21 u_char *pos; |
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22 u_char *last; |
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23 off_t file_pos; |
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24 off_t file_last; |
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25 |
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26 u_char *start; /* start of buffer */ |
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27 u_char *end; /* end of buffer */ |
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28 ngx_buf_tag_t tag; |
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29 ngx_file_t *file; |
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30 ngx_buf_t *shadow; |
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31 |
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32 |
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33 /* the buf's content could be changed */ |
343
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34 unsigned temporary:1; |
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35 |
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36 /* |
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37 * the buf's content is in a memory cache or in a read only memory |
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38 * and must not be changed |
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39 */ |
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40 unsigned memory:1; |
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41 |
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42 /* the buf's content is mmap()ed and must not be changed */ |
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43 unsigned mmap:1; |
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44 |
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45 unsigned recycled:1; |
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46 unsigned in_file:1; |
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47 unsigned flush:1; |
509 | 48 unsigned sync:1; |
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49 unsigned last_buf:1; |
509 | 50 unsigned last_in_chain:1; |
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51 |
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52 unsigned last_shadow:1; |
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53 unsigned temp_file:1; |
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54 |
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55 /* STUB */ int num; |
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56 }; |
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57 |
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58 |
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59 struct ngx_chain_s { |
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60 ngx_buf_t *buf; |
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61 ngx_chain_t *next; |
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62 }; |
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63 |
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64 |
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65 typedef struct { |
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66 ngx_int_t num; |
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67 size_t size; |
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68 } ngx_bufs_t; |
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69 |
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70 |
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71 typedef struct ngx_output_chain_ctx_s ngx_output_chain_ctx_t; |
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72 |
479 | 73 typedef ngx_int_t (*ngx_output_chain_filter_pt)(void *ctx, ngx_chain_t *in); |
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74 |
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75 typedef void (*ngx_output_chain_aio_pt)(ngx_output_chain_ctx_t *ctx, |
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76 ngx_file_t *file); |
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77 |
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78 struct ngx_output_chain_ctx_s { |
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79 ngx_buf_t *buf; |
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80 ngx_chain_t *in; |
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81 ngx_chain_t *free; |
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82 ngx_chain_t *busy; |
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83 |
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84 unsigned sendfile:1; |
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85 unsigned directio:1; |
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86 unsigned unaligned:1; |
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87 unsigned need_in_memory:1; |
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88 unsigned need_in_temp:1; |
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89 unsigned aio:1; |
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90 |
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91 #if (NGX_HAVE_FILE_AIO || NGX_COMPAT) |
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92 ngx_output_chain_aio_pt aio_handler; |
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93 #if (NGX_HAVE_AIO_SENDFILE || NGX_COMPAT) |
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94 ssize_t (*aio_preload)(ngx_buf_t *file); |
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95 #endif |
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96 #endif |
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97 |
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98 #if (NGX_THREADS || NGX_COMPAT) |
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99 ngx_int_t (*thread_handler)(ngx_thread_task_t *task, |
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100 ngx_file_t *file); |
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101 ngx_thread_task_t *thread_task; |
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102 #endif |
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103 |
3053 | 104 off_t alignment; |
105 | |
160
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106 ngx_pool_t *pool; |
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107 ngx_int_t allocated; |
160
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108 ngx_bufs_t bufs; |
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109 ngx_buf_tag_t tag; |
160
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110 |
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111 ngx_output_chain_filter_pt output_filter; |
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112 void *filter_ctx; |
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113 }; |
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114 |
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115 |
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116 typedef struct { |
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117 ngx_chain_t *out; |
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118 ngx_chain_t **last; |
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119 ngx_connection_t *connection; |
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120 ngx_pool_t *pool; |
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121 off_t limit; |
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122 } ngx_chain_writer_ctx_t; |
162
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123 |
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124 |
61
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125 #define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR |
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126 |
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127 |
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128 #define ngx_buf_in_memory(b) ((b)->temporary || (b)->memory || (b)->mmap) |
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129 #define ngx_buf_in_memory_only(b) (ngx_buf_in_memory(b) && !(b)->in_file) |
595 | 130 |
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131 #define ngx_buf_special(b) \ |
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132 (((b)->flush || (b)->last_buf || (b)->sync) \ |
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133 && !ngx_buf_in_memory(b) && !(b)->in_file) |
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134 |
595 | 135 #define ngx_buf_sync_only(b) \ |
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136 ((b)->sync && !ngx_buf_in_memory(b) \ |
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137 && !(b)->in_file && !(b)->flush && !(b)->last_buf) |
595 | 138 |
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139 #define ngx_buf_size(b) \ |
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140 (ngx_buf_in_memory(b) ? (off_t) ((b)->last - (b)->pos): \ |
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141 ((b)->file_last - (b)->file_pos)) |
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142 |
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143 ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size); |
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144 ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs); |
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145 |
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146 |
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147 #define ngx_alloc_buf(pool) ngx_palloc(pool, sizeof(ngx_buf_t)) |
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148 #define ngx_calloc_buf(pool) ngx_pcalloc(pool, sizeof(ngx_buf_t)) |
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149 |
507 | 150 ngx_chain_t *ngx_alloc_chain_link(ngx_pool_t *pool); |
151 #define ngx_free_chain(pool, cl) \ | |
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152 (cl)->next = (pool)->chain; \ |
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153 (pool)->chain = (cl) |
507 | 154 |
155
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155 |
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156 |
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157 ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in); |
479 | 158 ngx_int_t ngx_chain_writer(void *ctx, ngx_chain_t *in); |
162
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159 |
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160 ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, |
499 | 161 ngx_chain_t *in); |
581 | 162 ngx_chain_t *ngx_chain_get_free_buf(ngx_pool_t *p, ngx_chain_t **free); |
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163 void ngx_chain_update_chains(ngx_pool_t *p, ngx_chain_t **free, |
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164 ngx_chain_t **busy, ngx_chain_t **out, ngx_buf_tag_t tag); |
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165 |
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166 off_t ngx_chain_coalesce_file(ngx_chain_t **in, off_t limit); |
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167 |
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168 ngx_chain_t *ngx_chain_update_sent(ngx_chain_t *in, off_t sent); |
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169 |
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170 #endif /* _NGX_BUF_H_INCLUDED_ */ |