Mercurial > hg > nginx-quic

annotate src/http/modules/ngx_http_quic_module.c @ 8084:eece8e35e64d quic

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QUIC: allowed old DCID for initial packets until first ACK. If a packet sent in response to an initial client packet was lost, then successive client initial packets were dropped by nginx with the unexpected dcid message logged. This was because the new DCID generated by the server was not available to the client.
author Roman Arutyunyan <arut@nginx.com>
date Wed, 09 Sep 2020 16:35:29 +0300
parents 893b3313f53c
children b31c02454539
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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_http.h>
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11
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12
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13 static ngx_int_t ngx_http_variable_quic(ngx_http_request_t *r,
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14 ngx_http_variable_value_t *v, uintptr_t data);
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15 static ngx_int_t ngx_http_quic_add_variables(ngx_conf_t *cf);
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16 static void *ngx_http_quic_create_srv_conf(ngx_conf_t *cf);
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17 static char *ngx_http_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_http_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_http_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_http_quic_max_ack_delay_post =
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26 { ngx_http_quic_max_ack_delay };
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27 static ngx_conf_post_t ngx_http_quic_max_udp_payload_size_post =
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28 { ngx_http_quic_max_udp_payload_size };
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29 static ngx_conf_num_bounds_t ngx_http_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 ngx_http_quic_active_connection_id_limit_bounds =
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32 { ngx_conf_check_num_bounds, 2, -1 };
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33
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34
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35 static ngx_command_t ngx_http_quic_commands[] = {
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36
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37 { ngx_string("quic_max_idle_timeout"),
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38 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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39 ngx_conf_set_msec_slot,
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40 NGX_HTTP_SRV_CONF_OFFSET,
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41 offsetof(ngx_quic_conf_t, tp.max_idle_timeout),
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42 NULL },
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43
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44 { ngx_string("quic_max_ack_delay"),
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45 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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46 ngx_conf_set_msec_slot,
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47 NGX_HTTP_SRV_CONF_OFFSET,
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48 offsetof(ngx_quic_conf_t, tp.max_ack_delay),
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49 &ngx_http_quic_max_ack_delay_post },
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50
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51 { ngx_string("quic_max_udp_payload_size"),
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52 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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53 ngx_conf_set_size_slot,
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54 NGX_HTTP_SRV_CONF_OFFSET,
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55 offsetof(ngx_quic_conf_t, tp.max_udp_payload_size),
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56 &ngx_http_quic_max_udp_payload_size_post },
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57
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58 { ngx_string("quic_initial_max_data"),
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59 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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60 ngx_conf_set_size_slot,
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61 NGX_HTTP_SRV_CONF_OFFSET,
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62 offsetof(ngx_quic_conf_t, tp.initial_max_data),
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63 NULL },
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64
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65 { ngx_string("quic_initial_max_stream_data_bidi_local"),
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66 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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67 ngx_conf_set_size_slot,
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68 NGX_HTTP_SRV_CONF_OFFSET,
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69 offsetof(ngx_quic_conf_t, tp.initial_max_stream_data_bidi_local),
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70 NULL },
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71
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72 { ngx_string("quic_initial_max_stream_data_bidi_remote"),
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73 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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74 ngx_conf_set_size_slot,
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75 NGX_HTTP_SRV_CONF_OFFSET,
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76 offsetof(ngx_quic_conf_t, tp.initial_max_stream_data_bidi_remote),
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77 NULL },
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78
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79 { ngx_string("quic_initial_max_stream_data_uni"),
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80 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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81 ngx_conf_set_size_slot,
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82 NGX_HTTP_SRV_CONF_OFFSET,
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83 offsetof(ngx_quic_conf_t, tp.initial_max_stream_data_uni),
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84 NULL },
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85
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86 { ngx_string("quic_initial_max_streams_bidi"),
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87 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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88 ngx_conf_set_num_slot,
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89 NGX_HTTP_SRV_CONF_OFFSET,
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90 offsetof(ngx_quic_conf_t, tp.initial_max_streams_bidi),
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91 NULL },
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92
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93 { ngx_string("quic_initial_max_streams_uni"),
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94 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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95 ngx_conf_set_num_slot,
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96 NGX_HTTP_SRV_CONF_OFFSET,
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97 offsetof(ngx_quic_conf_t, tp.initial_max_streams_uni),
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98 NULL },
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99
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100 { ngx_string("quic_ack_delay_exponent"),
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101 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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102 ngx_conf_set_num_slot,
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103 NGX_HTTP_SRV_CONF_OFFSET,
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104 offsetof(ngx_quic_conf_t, tp.ack_delay_exponent),
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105 &ngx_http_quic_ack_delay_exponent_bounds },
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106
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107 { ngx_string("quic_active_migration"),
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108 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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109 ngx_conf_set_num_slot,
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110 NGX_HTTP_SRV_CONF_OFFSET,
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111 offsetof(ngx_quic_conf_t, tp.disable_active_migration),
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112 NULL },
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113
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114 { ngx_string("quic_active_connection_id_limit"),
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115 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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116 ngx_conf_set_num_slot,
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117 NGX_HTTP_SRV_CONF_OFFSET,
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118 offsetof(ngx_quic_conf_t, tp.active_connection_id_limit),
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119 &ngx_http_quic_active_connection_id_limit_bounds },
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120
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121 { ngx_string("quic_retry"),
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122 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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123 ngx_conf_set_flag_slot,
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124 NGX_HTTP_SRV_CONF_OFFSET,
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125 offsetof(ngx_quic_conf_t, retry),
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126 NULL },
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127
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128 ngx_null_command
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129 };
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130
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131
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132 static ngx_http_module_t ngx_http_quic_module_ctx = {
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133 ngx_http_quic_add_variables, /* preconfiguration */
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134 NULL, /* postconfiguration */
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135
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136 NULL, /* create main configuration */
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137 NULL, /* init main configuration */
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138
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139 ngx_http_quic_create_srv_conf, /* create server configuration */
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140 ngx_http_quic_merge_srv_conf, /* merge server configuration */
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141
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142 NULL, /* create location configuration */
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143 NULL /* merge location configuration */
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144 };
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145
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146
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147 ngx_module_t ngx_http_quic_module = {
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148 NGX_MODULE_V1,
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149 &ngx_http_quic_module_ctx, /* module context */
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150 ngx_http_quic_commands, /* module directives */
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151 NGX_HTTP_MODULE, /* module type */
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152 NULL, /* init master */
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153 NULL, /* init module */
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154 NULL, /* init process */
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155 NULL, /* init thread */
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156 NULL, /* exit thread */
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157 NULL, /* exit process */
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158 NULL, /* exit master */
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159 NGX_MODULE_V1_PADDING
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160 };
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161
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162
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163 static ngx_http_variable_t ngx_http_quic_vars[] = {
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164
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165 { ngx_string("quic"), NULL, ngx_http_variable_quic, 0, 0, 0 },
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166
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167 ngx_http_null_variable
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168 };
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169
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170
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171 static ngx_int_t
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172 ngx_http_variable_quic(ngx_http_request_t *r,
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173 ngx_http_variable_value_t *v, uintptr_t data)
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174 {
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175 if (r->connection->qs) {
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176
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177 v->len = 4;
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178 v->valid = 1;
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179 v->no_cacheable = 1;
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180 v->not_found = 0;
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181 v->data = (u_char *) "quic";
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182 return NGX_OK;
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183 }
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184
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185 v->not_found = 1;
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186
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187 return NGX_OK;
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188 }
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189
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190
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191 static ngx_int_t
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192 ngx_http_quic_add_variables(ngx_conf_t *cf)
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193 {
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194 ngx_http_variable_t *var, *v;
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195
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196 for (v = ngx_http_quic_vars; v->name.len; v++) {
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197 var = ngx_http_add_variable(cf, &v->name, v->flags);
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198 if (var == NULL) {
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199 return NGX_ERROR;
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200 }
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201
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202 var->get_handler = v->get_handler;
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203 var->data = v->data;
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204 }
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205
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206 return NGX_OK;
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207 }
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208
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209
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diff changeset
210 static void *
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211 ngx_http_quic_create_srv_conf(ngx_conf_t *cf)
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212 {
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213 ngx_quic_conf_t *conf;
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214
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215 conf = ngx_pcalloc(cf->pool, sizeof(ngx_quic_conf_t));
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216 if (conf == NULL) {
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217 return NULL;
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218 }
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219
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220 /*
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221 * set by ngx_pcalloc():
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222 *
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223 * conf->tp.original_dcid = { 0, NULL };
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224 * conf->tp.initial_scid = { 0, NULL };
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225 * conf->tp.retry_scid = { 0, NULL };
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226 * conf->tp.stateless_reset_token = { 0 }
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227 * conf->tp.preferred_address = NULL
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228 */
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229
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230 conf->tp.max_idle_timeout = NGX_CONF_UNSET_MSEC;
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231 conf->tp.max_ack_delay = NGX_CONF_UNSET_MSEC;
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232 conf->tp.max_udp_payload_size = NGX_CONF_UNSET_SIZE;
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233 conf->tp.initial_max_data = NGX_CONF_UNSET_SIZE;
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234 conf->tp.initial_max_stream_data_bidi_local = NGX_CONF_UNSET_SIZE;
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diff changeset
235 conf->tp.initial_max_stream_data_bidi_remote = NGX_CONF_UNSET_SIZE;
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236 conf->tp.initial_max_stream_data_uni = NGX_CONF_UNSET_SIZE;
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237 conf->tp.initial_max_streams_bidi = NGX_CONF_UNSET_UINT;
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238 conf->tp.initial_max_streams_uni = NGX_CONF_UNSET_UINT;
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diff changeset
239 conf->tp.ack_delay_exponent = NGX_CONF_UNSET_UINT;
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diff changeset
240 conf->tp.disable_active_migration = NGX_CONF_UNSET_UINT;
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diff changeset
241 conf->tp.active_connection_id_limit = NGX_CONF_UNSET_UINT;
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242
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diff changeset
243 conf->retry = NGX_CONF_UNSET;
8000
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parents: 7999
diff changeset
244 conf->require_alpn = 1;
7999
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245
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246 return conf;
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diff changeset
247 }
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248
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249
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diff changeset
250 static char *
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diff changeset
251 ngx_http_quic_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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diff changeset
252 {
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253 ngx_quic_conf_t *prev = parent;
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254 ngx_quic_conf_t *conf = child;
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255
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diff changeset
256 ngx_conf_merge_msec_value(conf->tp.max_idle_timeout,
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diff changeset
257 prev->tp.max_idle_timeout, 60000);
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diff changeset
258
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diff changeset
259 ngx_conf_merge_msec_value(conf->tp.max_ack_delay,
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diff changeset
260 prev->tp.max_ack_delay,
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diff changeset
261 NGX_QUIC_DEFAULT_MAX_ACK_DELAY);
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diff changeset
262
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diff changeset
263 ngx_conf_merge_size_value(conf->tp.max_udp_payload_size,
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264 prev->tp.max_udp_payload_size,
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265 NGX_QUIC_MAX_UDP_PAYLOAD_SIZE);
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266
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267 ngx_conf_merge_size_value(conf->tp.initial_max_data,
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268 prev->tp.initial_max_data,
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269 16 * NGX_QUIC_STREAM_BUFSIZE);
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270
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271 ngx_conf_merge_size_value(conf->tp.initial_max_stream_data_bidi_local,
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272 prev->tp.initial_max_stream_data_bidi_local,
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273 NGX_QUIC_STREAM_BUFSIZE);
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274
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275 ngx_conf_merge_size_value(conf->tp.initial_max_stream_data_bidi_remote,
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276 prev->tp.initial_max_stream_data_bidi_remote,
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277 NGX_QUIC_STREAM_BUFSIZE);
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278
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279 ngx_conf_merge_size_value(conf->tp.initial_max_stream_data_uni,
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280 prev->tp.initial_max_stream_data_uni,
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281 NGX_QUIC_STREAM_BUFSIZE);
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282
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283 ngx_conf_merge_uint_value(conf->tp.initial_max_streams_bidi,
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284 prev->tp.initial_max_streams_bidi, 16);
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285
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286 ngx_conf_merge_uint_value(conf->tp.initial_max_streams_uni,
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287 prev->tp.initial_max_streams_uni, 16);
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288
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289 ngx_conf_merge_uint_value(conf->tp.ack_delay_exponent,
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290 prev->tp.ack_delay_exponent,
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291 NGX_QUIC_DEFAULT_ACK_DELAY_EXPONENT);
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292
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293 ngx_conf_merge_uint_value(conf->tp.disable_active_migration,
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294 prev->tp.disable_active_migration, 1);
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295
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296 ngx_conf_merge_uint_value(conf->tp.active_connection_id_limit,
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297 prev->tp.active_connection_id_limit, 2);
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298
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299 ngx_conf_merge_value(conf->retry, prev->retry, 0);
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300
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301 if (conf->retry) {
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302 if (RAND_bytes(conf->token_key, sizeof(conf->token_key)) <= 0) {
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303 return NGX_CONF_ERROR;
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304 }
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305 }
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306
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307 return NGX_CONF_OK;
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308 }
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309
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310
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311 static char *
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312 ngx_http_quic_max_ack_delay(ngx_conf_t *cf, void *post, void *data)
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313 {
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314 ngx_msec_t *sp = data;
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315
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316 if (*sp > 16384) {
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317 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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318 "\"quic_max_ack_delay\" must be less than 16384");
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319
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320 return NGX_CONF_ERROR;
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321 }
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322
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323 return NGX_CONF_OK;
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324 }
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325
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326
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327 static char *
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328 ngx_http_quic_max_udp_payload_size(ngx_conf_t *cf, void *post, void *data)
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329 {
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330 size_t *sp = data;
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331
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332 if (*sp < NGX_QUIC_MIN_INITIAL_SIZE
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333 || *sp > NGX_QUIC_MAX_UDP_PAYLOAD_SIZE)
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diff changeset
334 {
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diff changeset
335 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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diff changeset
336 "\"quic_max_udp_payload_size\" must be between "
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parents:
diff changeset
337 "%d and %d",
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diff changeset
338 NGX_QUIC_MIN_INITIAL_SIZE,
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diff changeset
339 NGX_QUIC_MAX_UDP_PAYLOAD_SIZE);
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340
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341 return NGX_CONF_ERROR;
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diff changeset
342 }
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diff changeset
343
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344 return NGX_CONF_OK;
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diff changeset
345 }