Mercurial > hg > nginx
annotate src/http/v2/ngx_http_v2.h @ 7191:61d276dcd493
HTTP/2: more style, comments, and debugging.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Mon, 29 Jan 2018 16:06:33 +0300 |
parents | 12cadc4669a7 |
children | ca8f8a443c11 |
rev | line source |
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The HTTP/2 implementation (RFC 7240, 7241).
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1 /* |
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2 * Copyright (C) Nginx, Inc. |
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3 * Copyright (C) Valentin V. Bartenev |
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4 */ |
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5 |
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6 |
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7 #ifndef _NGX_HTTP_V2_H_INCLUDED_ |
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8 #define _NGX_HTTP_V2_H_INCLUDED_ |
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9 |
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10 |
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11 #include <ngx_config.h> |
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12 #include <ngx_core.h> |
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13 #include <ngx_http.h> |
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14 |
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15 |
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16 #define NGX_HTTP_V2_ALPN_ADVERTISE "\x02h2" |
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17 #define NGX_HTTP_V2_NPN_ADVERTISE NGX_HTTP_V2_ALPN_ADVERTISE |
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18 |
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19 #define NGX_HTTP_V2_STATE_BUFFER_SIZE 16 |
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20 |
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21 #define NGX_HTTP_V2_MAX_FRAME_SIZE ((1 << 24) - 1) |
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22 |
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23 #define NGX_HTTP_V2_INT_OCTETS 4 |
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24 #define NGX_HTTP_V2_MAX_FIELD \ |
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25 (127 + (1 << (NGX_HTTP_V2_INT_OCTETS - 1) * 7) - 1) |
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26 |
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27 #define NGX_HTTP_V2_FRAME_HEADER_SIZE 9 |
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28 |
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29 /* frame types */ |
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30 #define NGX_HTTP_V2_DATA_FRAME 0x0 |
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31 #define NGX_HTTP_V2_HEADERS_FRAME 0x1 |
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32 #define NGX_HTTP_V2_PRIORITY_FRAME 0x2 |
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33 #define NGX_HTTP_V2_RST_STREAM_FRAME 0x3 |
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34 #define NGX_HTTP_V2_SETTINGS_FRAME 0x4 |
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35 #define NGX_HTTP_V2_PUSH_PROMISE_FRAME 0x5 |
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36 #define NGX_HTTP_V2_PING_FRAME 0x6 |
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37 #define NGX_HTTP_V2_GOAWAY_FRAME 0x7 |
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38 #define NGX_HTTP_V2_WINDOW_UPDATE_FRAME 0x8 |
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39 #define NGX_HTTP_V2_CONTINUATION_FRAME 0x9 |
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40 |
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41 /* frame flags */ |
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42 #define NGX_HTTP_V2_NO_FLAG 0x00 |
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43 #define NGX_HTTP_V2_ACK_FLAG 0x01 |
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44 #define NGX_HTTP_V2_END_STREAM_FLAG 0x01 |
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45 #define NGX_HTTP_V2_END_HEADERS_FLAG 0x04 |
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46 #define NGX_HTTP_V2_PADDED_FLAG 0x08 |
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47 #define NGX_HTTP_V2_PRIORITY_FLAG 0x20 |
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48 |
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49 #define NGX_HTTP_V2_MAX_WINDOW ((1U << 31) - 1) |
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50 #define NGX_HTTP_V2_DEFAULT_WINDOW 65535 |
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51 |
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52 #define NGX_HTTP_V2_DEFAULT_WEIGHT 16 |
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53 |
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54 |
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55 typedef struct ngx_http_v2_connection_s ngx_http_v2_connection_t; |
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56 typedef struct ngx_http_v2_node_s ngx_http_v2_node_t; |
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57 typedef struct ngx_http_v2_out_frame_s ngx_http_v2_out_frame_t; |
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58 |
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59 |
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60 typedef u_char *(*ngx_http_v2_handler_pt) (ngx_http_v2_connection_t *h2c, |
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61 u_char *pos, u_char *end); |
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62 |
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63 |
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64 typedef struct { |
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65 ngx_str_t name; |
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66 ngx_str_t value; |
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67 } ngx_http_v2_header_t; |
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68 |
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69 |
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70 typedef struct { |
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71 ngx_uint_t sid; |
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72 size_t length; |
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73 size_t padding; |
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74 unsigned flags:8; |
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75 |
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76 unsigned incomplete:1; |
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77 unsigned keep_pool:1; |
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78 |
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79 /* HPACK */ |
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80 unsigned parse_name:1; |
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81 unsigned parse_value:1; |
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82 unsigned index:1; |
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83 ngx_http_v2_header_t header; |
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84 size_t header_limit; |
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85 u_char field_state; |
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86 u_char *field_start; |
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87 u_char *field_end; |
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88 size_t field_rest; |
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89 ngx_pool_t *pool; |
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90 |
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91 ngx_http_v2_stream_t *stream; |
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92 |
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93 u_char buffer[NGX_HTTP_V2_STATE_BUFFER_SIZE]; |
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94 size_t buffer_used; |
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95 ngx_http_v2_handler_pt handler; |
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96 } ngx_http_v2_state_t; |
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97 |
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98 |
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99 |
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100 typedef struct { |
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101 ngx_http_v2_header_t **entries; |
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102 |
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103 ngx_uint_t added; |
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104 ngx_uint_t deleted; |
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105 ngx_uint_t reused; |
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106 ngx_uint_t allocated; |
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107 |
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108 size_t size; |
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109 size_t free; |
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110 u_char *storage; |
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111 u_char *pos; |
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112 } ngx_http_v2_hpack_t; |
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113 |
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114 |
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115 struct ngx_http_v2_connection_s { |
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116 ngx_connection_t *connection; |
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The HTTP/2 implementation (RFC 7240, 7241).
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117 ngx_http_connection_t *http_connection; |
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118 |
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119 ngx_uint_t processing; |
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120 |
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121 size_t send_window; |
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122 size_t recv_window; |
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123 size_t init_window; |
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124 |
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125 size_t frame_size; |
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126 |
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127 ngx_queue_t waiting; |
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128 |
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129 ngx_http_v2_state_t state; |
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130 |
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131 ngx_http_v2_hpack_t hpack; |
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132 |
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133 ngx_pool_t *pool; |
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134 |
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135 ngx_http_v2_out_frame_t *free_frames; |
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136 ngx_connection_t *free_fake_connections; |
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137 |
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138 ngx_http_v2_node_t **streams_index; |
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139 |
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140 ngx_http_v2_out_frame_t *last_out; |
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141 |
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142 ngx_queue_t dependencies; |
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143 ngx_queue_t closed; |
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144 |
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145 ngx_uint_t last_sid; |
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146 |
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147 unsigned closed_nodes:8; |
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HTTP/2: refuse streams with data until SETTINGS is acknowledged.
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148 unsigned settings_ack:1; |
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HTTP/2: signal 0-byte HPACK's dynamic table size.
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149 unsigned table_update:1; |
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150 unsigned blocked:1; |
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HTTP/2: graceful shutdown of active connections (closes #1106).
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151 unsigned goaway:1; |
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152 }; |
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153 |
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154 |
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155 struct ngx_http_v2_node_s { |
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156 ngx_uint_t id; |
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157 ngx_http_v2_node_t *index; |
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The HTTP/2 implementation (RFC 7240, 7241).
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158 ngx_http_v2_node_t *parent; |
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159 ngx_queue_t queue; |
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160 ngx_queue_t children; |
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The HTTP/2 implementation (RFC 7240, 7241).
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161 ngx_queue_t reuse; |
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The HTTP/2 implementation (RFC 7240, 7241).
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162 ngx_uint_t rank; |
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The HTTP/2 implementation (RFC 7240, 7241).
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163 ngx_uint_t weight; |
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The HTTP/2 implementation (RFC 7240, 7241).
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164 double rel_weight; |
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165 ngx_http_v2_stream_t *stream; |
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166 }; |
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167 |
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168 |
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169 struct ngx_http_v2_stream_s { |
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170 ngx_http_request_t *request; |
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171 ngx_http_v2_connection_t *connection; |
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172 ngx_http_v2_node_t *node; |
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173 |
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174 ngx_uint_t queued; |
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175 |
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176 /* |
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The HTTP/2 implementation (RFC 7240, 7241).
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177 * A change to SETTINGS_INITIAL_WINDOW_SIZE could cause the |
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The HTTP/2 implementation (RFC 7240, 7241).
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178 * send_window to become negative, hence it's signed. |
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The HTTP/2 implementation (RFC 7240, 7241).
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179 */ |
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The HTTP/2 implementation (RFC 7240, 7241).
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180 ssize_t send_window; |
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181 size_t recv_window; |
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182 |
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183 ngx_buf_t *preread; |
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184 |
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185 ngx_http_v2_out_frame_t *free_frames; |
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HTTP/2: reused HEADERS and CONTINUATION frames buffers.
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186 ngx_chain_t *free_frame_headers; |
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187 ngx_chain_t *free_bufs; |
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188 |
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189 ngx_queue_t queue; |
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190 |
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|
191 ngx_array_t *cookies; |
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|
192 |
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The HTTP/2 implementation (RFC 7240, 7241).
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193 size_t header_limit; |
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194 |
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195 ngx_pool_t *pool; |
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HTTP/2: always use temporary pool for processing headers.
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196 |
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3834951e32ab
HTTP/2: fixed posted streams handling.
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197 unsigned waiting:1; |
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198 unsigned blocked:1; |
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|
199 unsigned exhausted:1; |
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|
200 unsigned in_closed:1; |
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The HTTP/2 implementation (RFC 7240, 7241).
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201 unsigned out_closed:1; |
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92464ebace8e
HTTP/2: sending RST_STREAM with NO_ERROR to discard request body.
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parents:
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202 unsigned rst_sent:1; |
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HTTP/2: rewritten handling of request body.
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203 unsigned no_flow_control:1; |
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HTTP/2: rewritten handling of request body.
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|
204 unsigned skip_data:1; |
6246
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|
205 }; |
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|
206 |
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207 |
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|
208 struct ngx_http_v2_out_frame_s { |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
209 ngx_http_v2_out_frame_t *next; |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
210 ngx_chain_t *first; |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
211 ngx_chain_t *last; |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
212 ngx_int_t (*handler)(ngx_http_v2_connection_t *h2c, |
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The HTTP/2 implementation (RFC 7240, 7241).
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parents:
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|
213 ngx_http_v2_out_frame_t *frame); |
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214 |
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The HTTP/2 implementation (RFC 7240, 7241).
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parents:
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|
215 ngx_http_v2_stream_t *stream; |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
216 size_t length; |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
217 |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
218 unsigned blocked:1; |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
219 unsigned fin:1; |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
220 }; |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
221 |
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parents:
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|
222 |
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The HTTP/2 implementation (RFC 7240, 7241).
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parents:
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|
223 static ngx_inline void |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
224 ngx_http_v2_queue_frame(ngx_http_v2_connection_t *h2c, |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
225 ngx_http_v2_out_frame_t *frame) |
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The HTTP/2 implementation (RFC 7240, 7241).
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parents:
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|
226 { |
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The HTTP/2 implementation (RFC 7240, 7241).
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parents:
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|
227 ngx_http_v2_out_frame_t **out; |
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The HTTP/2 implementation (RFC 7240, 7241).
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parents:
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|
228 |
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The HTTP/2 implementation (RFC 7240, 7241).
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229 for (out = &h2c->last_out; *out; out = &(*out)->next) { |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
230 |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
231 if ((*out)->blocked || (*out)->stream == NULL) { |
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The HTTP/2 implementation (RFC 7240, 7241).
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parents:
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|
232 break; |
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The HTTP/2 implementation (RFC 7240, 7241).
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parents:
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|
233 } |
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The HTTP/2 implementation (RFC 7240, 7241).
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parents:
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|
234 |
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The HTTP/2 implementation (RFC 7240, 7241).
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parents:
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|
235 if ((*out)->stream->node->rank < frame->stream->node->rank |
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The HTTP/2 implementation (RFC 7240, 7241).
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|
236 || ((*out)->stream->node->rank == frame->stream->node->rank |
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237 && (*out)->stream->node->rel_weight |
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238 >= frame->stream->node->rel_weight)) |
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239 { |
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240 break; |
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241 } |
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242 } |
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243 |
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244 frame->next = *out; |
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245 *out = frame; |
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246 } |
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247 |
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248 |
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249 static ngx_inline void |
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250 ngx_http_v2_queue_blocked_frame(ngx_http_v2_connection_t *h2c, |
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251 ngx_http_v2_out_frame_t *frame) |
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252 { |
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253 ngx_http_v2_out_frame_t **out; |
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254 |
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255 for (out = &h2c->last_out; *out; out = &(*out)->next) { |
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256 |
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257 if ((*out)->blocked || (*out)->stream == NULL) { |
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258 break; |
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259 } |
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260 } |
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261 |
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262 frame->next = *out; |
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263 *out = frame; |
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264 } |
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265 |
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266 |
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267 static ngx_inline void |
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268 ngx_http_v2_queue_ordered_frame(ngx_http_v2_connection_t *h2c, |
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269 ngx_http_v2_out_frame_t *frame) |
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270 { |
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271 frame->next = h2c->last_out; |
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272 h2c->last_out = frame; |
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273 } |
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274 |
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275 |
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276 void ngx_http_v2_init(ngx_event_t *rev); |
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277 |
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278 ngx_int_t ngx_http_v2_read_request_body(ngx_http_request_t *r); |
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279 ngx_int_t ngx_http_v2_read_unbuffered_request_body(ngx_http_request_t *r); |
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280 |
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281 void ngx_http_v2_close_stream(ngx_http_v2_stream_t *stream, ngx_int_t rc); |
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282 |
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283 ngx_int_t ngx_http_v2_send_output_queue(ngx_http_v2_connection_t *h2c); |
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284 |
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285 |
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286 ngx_int_t ngx_http_v2_get_indexed_header(ngx_http_v2_connection_t *h2c, |
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287 ngx_uint_t index, ngx_uint_t name_only); |
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288 ngx_int_t ngx_http_v2_add_header(ngx_http_v2_connection_t *h2c, |
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289 ngx_http_v2_header_t *header); |
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290 ngx_int_t ngx_http_v2_table_size(ngx_http_v2_connection_t *h2c, size_t size); |
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291 |
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292 |
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293 ngx_int_t ngx_http_v2_huff_decode(u_char *state, u_char *src, size_t len, |
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294 u_char **dst, ngx_uint_t last, ngx_log_t *log); |
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295 size_t ngx_http_v2_huff_encode(u_char *src, size_t len, u_char *dst, |
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296 ngx_uint_t lower); |
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297 |
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298 |
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299 #define ngx_http_v2_prefix(bits) ((1 << (bits)) - 1) |
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300 |
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301 |
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302 #if (NGX_HAVE_NONALIGNED) |
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303 |
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304 #define ngx_http_v2_parse_uint16(p) ntohs(*(uint16_t *) (p)) |
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305 #define ngx_http_v2_parse_uint32(p) ntohl(*(uint32_t *) (p)) |
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306 |
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|
307 #else |
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308 |
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309 #define ngx_http_v2_parse_uint16(p) ((p)[0] << 8 | (p)[1]) |
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310 #define ngx_http_v2_parse_uint32(p) \ |
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311 ((uint32_t) (p)[0] << 24 | (p)[1] << 16 | (p)[2] << 8 | (p)[3]) |
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312 |
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313 #endif |
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314 |
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315 #define ngx_http_v2_parse_length(p) ((p) >> 8) |
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316 #define ngx_http_v2_parse_type(p) ((p) & 0xff) |
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317 #define ngx_http_v2_parse_sid(p) (ngx_http_v2_parse_uint32(p) & 0x7fffffff) |
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318 #define ngx_http_v2_parse_window(p) (ngx_http_v2_parse_uint32(p) & 0x7fffffff) |
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319 |
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320 |
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321 #define ngx_http_v2_write_uint16_aligned(p, s) \ |
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322 (*(uint16_t *) (p) = htons((uint16_t) (s)), (p) + sizeof(uint16_t)) |
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323 #define ngx_http_v2_write_uint32_aligned(p, s) \ |
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324 (*(uint32_t *) (p) = htonl((uint32_t) (s)), (p) + sizeof(uint32_t)) |
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325 |
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326 #if (NGX_HAVE_NONALIGNED) |
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327 |
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328 #define ngx_http_v2_write_uint16 ngx_http_v2_write_uint16_aligned |
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329 #define ngx_http_v2_write_uint32 ngx_http_v2_write_uint32_aligned |
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330 |
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|
331 #else |
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|
332 |
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333 #define ngx_http_v2_write_uint16(p, s) \ |
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334 ((p)[0] = (u_char) ((s) >> 8), \ |
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335 (p)[1] = (u_char) (s), \ |
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|
336 (p) + sizeof(uint16_t)) |
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337 |
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338 #define ngx_http_v2_write_uint32(p, s) \ |
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339 ((p)[0] = (u_char) ((s) >> 24), \ |
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340 (p)[1] = (u_char) ((s) >> 16), \ |
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341 (p)[2] = (u_char) ((s) >> 8), \ |
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342 (p)[3] = (u_char) (s), \ |
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343 (p) + sizeof(uint32_t)) |
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344 |
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345 #endif |
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346 |
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347 #define ngx_http_v2_write_len_and_type(p, l, t) \ |
257b51c37c5a
The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
parents:
diff
changeset
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348 ngx_http_v2_write_uint32_aligned(p, (l) << 8 | (t)) |
257b51c37c5a
The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
parents:
diff
changeset
|
349 |
257b51c37c5a
The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
parents:
diff
changeset
|
350 #define ngx_http_v2_write_sid ngx_http_v2_write_uint32 |
257b51c37c5a
The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
parents:
diff
changeset
|
351 |
257b51c37c5a
The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
parents:
diff
changeset
|
352 #endif /* _NGX_HTTP_V2_H_INCLUDED_ */ |