Mercurial > hg > nginx-quic
annotate src/stream/ngx_stream_quic_module.c @ 8098:d0d3fc0697a0 quic
QUIC: packet processing refactoring.
All packet header parsing is now performed by ngx_quic_parse_packet()
function, located in the ngx_quic_transport.c file.
The packet processing is centralized in the ngx_quic_process_packet()
function which decides if the packet should be accepted, ignored or
connection should be closed, depending on the connection state.
As a result of refactoring, behavior has changed in some places:
- minimal size of Initial packet is now always tested
- connection IDs are always tested in existing connections
- old keys are discarded on encryption level switch
author | Vladimir Homutov <vl@nginx.com> |
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date | Wed, 30 Sep 2020 15:14:09 +0300 |
parents | 893b3313f53c |
children | bed310672f39 |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Nginx, Inc. |
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4 * Copyright (C) Roman Arutyunyan |
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5 */ |
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6 |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_stream.h> |
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11 |
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12 |
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13 static ngx_int_t ngx_stream_variable_quic(ngx_stream_session_t *s, |
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14 ngx_stream_variable_value_t *v, uintptr_t data); |
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15 static ngx_int_t ngx_stream_quic_add_variables(ngx_conf_t *cf); |
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16 static void *ngx_stream_quic_create_srv_conf(ngx_conf_t *cf); |
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17 static char *ngx_stream_quic_merge_srv_conf(ngx_conf_t *cf, void *parent, |
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18 void *child); |
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19 static char *ngx_stream_quic_max_ack_delay(ngx_conf_t *cf, void *post, |
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20 void *data); |
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21 static char *ngx_stream_quic_max_udp_payload_size(ngx_conf_t *cf, void *post, |
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22 void *data); |
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23 |
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24 |
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25 static ngx_conf_post_t ngx_stream_quic_max_ack_delay_post = |
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26 { ngx_stream_quic_max_ack_delay }; |
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27 static ngx_conf_post_t ngx_stream_quic_max_udp_payload_size_post = |
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28 { ngx_stream_quic_max_udp_payload_size }; |
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29 static ngx_conf_num_bounds_t ngx_stream_quic_ack_delay_exponent_bounds = |
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30 { ngx_conf_check_num_bounds, 0, 20 }; |
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31 static ngx_conf_num_bounds_t |
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32 ngx_stream_quic_active_connection_id_limit_bounds = |
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33 { ngx_conf_check_num_bounds, 2, -1 }; |
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34 |
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35 |
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36 static ngx_command_t ngx_stream_quic_commands[] = { |
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37 |
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38 { ngx_string("quic_max_idle_timeout"), |
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39 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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40 ngx_conf_set_msec_slot, |
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41 NGX_STREAM_SRV_CONF_OFFSET, |
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42 offsetof(ngx_quic_conf_t, tp.max_idle_timeout), |
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43 NULL }, |
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44 |
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45 { ngx_string("quic_max_ack_delay"), |
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46 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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47 ngx_conf_set_msec_slot, |
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48 NGX_STREAM_SRV_CONF_OFFSET, |
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49 offsetof(ngx_quic_conf_t, tp.max_ack_delay), |
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50 &ngx_stream_quic_max_ack_delay_post }, |
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51 |
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52 { ngx_string("quic_max_udp_payload_size"), |
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53 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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54 ngx_conf_set_size_slot, |
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55 NGX_STREAM_SRV_CONF_OFFSET, |
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56 offsetof(ngx_quic_conf_t, tp.max_udp_payload_size), |
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57 &ngx_stream_quic_max_udp_payload_size_post }, |
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58 |
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59 { ngx_string("quic_initial_max_data"), |
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60 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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61 ngx_conf_set_size_slot, |
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62 NGX_STREAM_SRV_CONF_OFFSET, |
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63 offsetof(ngx_quic_conf_t, tp.initial_max_data), |
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64 NULL }, |
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65 |
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66 { ngx_string("quic_initial_max_stream_data_bidi_local"), |
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67 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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68 ngx_conf_set_size_slot, |
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69 NGX_STREAM_SRV_CONF_OFFSET, |
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70 offsetof(ngx_quic_conf_t, tp.initial_max_stream_data_bidi_local), |
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71 NULL }, |
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72 |
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73 { ngx_string("quic_initial_max_stream_data_bidi_remote"), |
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74 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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75 ngx_conf_set_size_slot, |
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76 NGX_STREAM_SRV_CONF_OFFSET, |
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77 offsetof(ngx_quic_conf_t, tp.initial_max_stream_data_bidi_remote), |
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78 NULL }, |
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79 |
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80 { ngx_string("quic_initial_max_stream_data_uni"), |
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81 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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82 ngx_conf_set_size_slot, |
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83 NGX_STREAM_SRV_CONF_OFFSET, |
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84 offsetof(ngx_quic_conf_t, tp.initial_max_stream_data_uni), |
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85 NULL }, |
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86 |
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87 { ngx_string("quic_initial_max_streams_bidi"), |
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88 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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89 ngx_conf_set_num_slot, |
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90 NGX_STREAM_SRV_CONF_OFFSET, |
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91 offsetof(ngx_quic_conf_t, tp.initial_max_streams_bidi), |
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92 NULL }, |
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93 |
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94 { ngx_string("quic_initial_max_streams_uni"), |
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95 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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96 ngx_conf_set_num_slot, |
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97 NGX_STREAM_SRV_CONF_OFFSET, |
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98 offsetof(ngx_quic_conf_t, tp.initial_max_streams_uni), |
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99 NULL }, |
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100 |
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101 { ngx_string("quic_ack_delay_exponent"), |
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102 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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103 ngx_conf_set_num_slot, |
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104 NGX_STREAM_SRV_CONF_OFFSET, |
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105 offsetof(ngx_quic_conf_t, tp.ack_delay_exponent), |
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106 &ngx_stream_quic_ack_delay_exponent_bounds }, |
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107 |
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108 { ngx_string("quic_active_migration"), |
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109 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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110 ngx_conf_set_num_slot, |
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111 NGX_STREAM_SRV_CONF_OFFSET, |
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112 offsetof(ngx_quic_conf_t, tp.disable_active_migration), |
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113 NULL }, |
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114 |
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115 { ngx_string("quic_active_connection_id_limit"), |
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116 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, |
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117 ngx_conf_set_num_slot, |
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118 NGX_STREAM_SRV_CONF_OFFSET, |
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119 offsetof(ngx_quic_conf_t, tp.active_connection_id_limit), |
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120 &ngx_stream_quic_active_connection_id_limit_bounds }, |
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121 |
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122 { ngx_string("quic_retry"), |
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123 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG, |
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124 ngx_conf_set_flag_slot, |
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125 NGX_STREAM_SRV_CONF_OFFSET, |
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126 offsetof(ngx_quic_conf_t, retry), |
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127 NULL }, |
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128 |
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129 ngx_null_command |
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130 }; |
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131 |
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132 |
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133 static ngx_stream_module_t ngx_stream_quic_module_ctx = { |
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134 ngx_stream_quic_add_variables, /* preconfiguration */ |
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135 NULL, /* postconfiguration */ |
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136 |
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137 NULL, /* create main configuration */ |
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138 NULL, /* init main configuration */ |
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139 |
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140 ngx_stream_quic_create_srv_conf, /* create server configuration */ |
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141 ngx_stream_quic_merge_srv_conf, /* merge server configuration */ |
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142 }; |
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143 |
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144 |
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145 ngx_module_t ngx_stream_quic_module = { |
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146 NGX_MODULE_V1, |
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147 &ngx_stream_quic_module_ctx, /* module context */ |
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148 ngx_stream_quic_commands, /* module directives */ |
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149 NGX_STREAM_MODULE, /* module type */ |
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150 NULL, /* init master */ |
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151 NULL, /* init module */ |
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152 NULL, /* init process */ |
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153 NULL, /* init thread */ |
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154 NULL, /* exit thread */ |
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155 NULL, /* exit process */ |
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156 NULL, /* exit master */ |
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157 NGX_MODULE_V1_PADDING |
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158 }; |
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159 |
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160 |
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161 static ngx_stream_variable_t ngx_stream_quic_vars[] = { |
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162 |
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163 { ngx_string("quic"), NULL, ngx_stream_variable_quic, 0, 0, 0 }, |
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164 |
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165 ngx_stream_null_variable |
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166 }; |
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167 |
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168 |
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169 static ngx_int_t |
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170 ngx_stream_variable_quic(ngx_stream_session_t *s, |
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171 ngx_stream_variable_value_t *v, uintptr_t data) |
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172 { |
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173 if (s->connection->qs) { |
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174 |
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175 v->len = 4; |
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176 v->valid = 1; |
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177 v->no_cacheable = 1; |
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178 v->not_found = 0; |
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179 v->data = (u_char *) "quic"; |
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180 return NGX_OK; |
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181 } |
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182 |
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183 v->not_found = 1; |
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184 |
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185 return NGX_OK; |
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186 } |
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187 |
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188 |
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189 static ngx_int_t |
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190 ngx_stream_quic_add_variables(ngx_conf_t *cf) |
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191 { |
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192 ngx_stream_variable_t *var, *v; |
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193 |
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194 for (v = ngx_stream_quic_vars; v->name.len; v++) { |
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195 var = ngx_stream_add_variable(cf, &v->name, v->flags); |
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196 if (var == NULL) { |
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197 return NGX_ERROR; |
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198 } |
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199 |
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200 var->get_handler = v->get_handler; |
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201 var->data = v->data; |
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202 } |
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203 |
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204 return NGX_OK; |
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205 } |
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206 |
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207 |
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208 static void * |
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209 ngx_stream_quic_create_srv_conf(ngx_conf_t *cf) |
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210 { |
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211 ngx_quic_conf_t *conf; |
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212 |
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213 conf = ngx_pcalloc(cf->pool, sizeof(ngx_quic_conf_t)); |
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214 if (conf == NULL) { |
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215 return NULL; |
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216 } |
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217 |
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218 /* |
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219 * set by ngx_pcalloc(): |
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220 * |
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221 * conf->tp.original_dcid = { 0, NULL }; |
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222 * conf->tp.initial_scid = { 0, NULL }; |
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223 * conf->tp.retry_scid = { 0, NULL }; |
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224 * conf->tp.stateless_reset_token = { 0 } |
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225 * conf->tp.preferred_address = NULL |
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226 * conf->require_alpn = 0; |
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227 */ |
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228 |
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229 conf->tp.max_idle_timeout = NGX_CONF_UNSET_MSEC; |
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230 conf->tp.max_ack_delay = NGX_CONF_UNSET_MSEC; |
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231 conf->tp.max_udp_payload_size = NGX_CONF_UNSET_SIZE; |
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232 conf->tp.initial_max_data = NGX_CONF_UNSET_SIZE; |
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233 conf->tp.initial_max_stream_data_bidi_local = NGX_CONF_UNSET_SIZE; |
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234 conf->tp.initial_max_stream_data_bidi_remote = NGX_CONF_UNSET_SIZE; |
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235 conf->tp.initial_max_stream_data_uni = NGX_CONF_UNSET_SIZE; |
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236 conf->tp.initial_max_streams_bidi = NGX_CONF_UNSET_UINT; |
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237 conf->tp.initial_max_streams_uni = NGX_CONF_UNSET_UINT; |
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238 conf->tp.ack_delay_exponent = NGX_CONF_UNSET_UINT; |
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239 conf->tp.disable_active_migration = NGX_CONF_UNSET_UINT; |
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240 conf->tp.active_connection_id_limit = NGX_CONF_UNSET_UINT; |
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241 |
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242 conf->retry = NGX_CONF_UNSET; |
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243 |
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244 return conf; |
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245 } |
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246 |
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247 |
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248 static char * |
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249 ngx_stream_quic_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) |
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250 { |
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251 ngx_quic_conf_t *prev = parent; |
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252 ngx_quic_conf_t *conf = child; |
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253 |
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254 ngx_conf_merge_msec_value(conf->tp.max_idle_timeout, |
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255 prev->tp.max_idle_timeout, 60000); |
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256 |
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257 ngx_conf_merge_msec_value(conf->tp.max_ack_delay, |
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258 prev->tp.max_ack_delay, |
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259 NGX_QUIC_DEFAULT_MAX_ACK_DELAY); |
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260 |
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261 ngx_conf_merge_size_value(conf->tp.max_udp_payload_size, |
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262 prev->tp.max_udp_payload_size, |
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263 NGX_QUIC_MAX_UDP_PAYLOAD_SIZE); |
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264 |
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265 ngx_conf_merge_size_value(conf->tp.initial_max_data, |
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266 prev->tp.initial_max_data, |
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267 16 * NGX_QUIC_STREAM_BUFSIZE); |
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268 |
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269 ngx_conf_merge_size_value(conf->tp.initial_max_stream_data_bidi_local, |
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270 prev->tp.initial_max_stream_data_bidi_local, |
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271 NGX_QUIC_STREAM_BUFSIZE); |
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272 |
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273 ngx_conf_merge_size_value(conf->tp.initial_max_stream_data_bidi_remote, |
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274 prev->tp.initial_max_stream_data_bidi_remote, |
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275 NGX_QUIC_STREAM_BUFSIZE); |
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276 |
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277 ngx_conf_merge_size_value(conf->tp.initial_max_stream_data_uni, |
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278 prev->tp.initial_max_stream_data_uni, |
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279 NGX_QUIC_STREAM_BUFSIZE); |
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280 |
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281 ngx_conf_merge_uint_value(conf->tp.initial_max_streams_bidi, |
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282 prev->tp.initial_max_streams_bidi, 16); |
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283 |
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284 ngx_conf_merge_uint_value(conf->tp.initial_max_streams_uni, |
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285 prev->tp.initial_max_streams_uni, 16); |
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286 |
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287 ngx_conf_merge_uint_value(conf->tp.ack_delay_exponent, |
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288 prev->tp.ack_delay_exponent, |
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289 NGX_QUIC_DEFAULT_ACK_DELAY_EXPONENT); |
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290 |
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291 ngx_conf_merge_uint_value(conf->tp.disable_active_migration, |
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292 prev->tp.disable_active_migration, 1); |
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293 |
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294 ngx_conf_merge_uint_value(conf->tp.active_connection_id_limit, |
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295 prev->tp.active_connection_id_limit, 2); |
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296 |
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297 ngx_conf_merge_value(conf->retry, prev->retry, 0); |
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298 |
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299 if (conf->retry) { |
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300 if (RAND_bytes(conf->token_key, sizeof(conf->token_key)) <= 0) { |
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301 return NGX_CONF_ERROR; |
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302 } |
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|
303 } |
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304 |
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305 return NGX_CONF_OK; |
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306 } |
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307 |
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308 |
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309 static char * |
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310 ngx_stream_quic_max_ack_delay(ngx_conf_t *cf, void *post, void *data) |
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311 { |
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312 ngx_msec_t *sp = data; |
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313 |
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314 if (*sp > 16384) { |
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315 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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316 "\"quic_max_ack_delay\" must be less than 16384"); |
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317 |
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318 return NGX_CONF_ERROR; |
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|
319 } |
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320 |
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321 return NGX_CONF_OK; |
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|
322 } |
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323 |
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324 |
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325 static char * |
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326 ngx_stream_quic_max_udp_payload_size(ngx_conf_t *cf, void *post, void *data) |
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|
327 { |
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|
328 size_t *sp = data; |
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329 |
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330 if (*sp < NGX_QUIC_MIN_INITIAL_SIZE |
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331 || *sp > NGX_QUIC_MAX_UDP_PAYLOAD_SIZE) |
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|
332 { |
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|
333 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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|
334 "\"quic_max_udp_payload_size\" must be between " |
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|
335 "%d and %d", |
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|
336 NGX_QUIC_MIN_INITIAL_SIZE, |
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|
337 NGX_QUIC_MAX_UDP_PAYLOAD_SIZE); |
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338 |
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339 return NGX_CONF_ERROR; |
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340 } |
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341 |
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342 return NGX_CONF_OK; |
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343 } |