Mercurial > hg > nginx
annotate src/http/v3/ngx_http_v3_module.c @ 8383:7ea34e13937f quic
Address validation using Retry packets.
The behaviour is toggled with the new directive "quic_retry on|off".
QUIC token construction is made suitable for issuing with NEW_TOKEN.
author | Sergey Kandaurov <pluknet@nginx.com> |
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date | Thu, 14 May 2020 15:47:18 +0300 |
parents | 036164360fa9 |
children | 125cbfa77013 |
rev | line source |
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8215 | 1 |
2 /* | |
3 * Copyright (C) Nginx, Inc. | |
4 * Copyright (C) Roman Arutyunyan | |
5 */ | |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
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13 static char *ngx_http_v3_max_ack_delay(ngx_conf_t *cf, void *post, void *data); |
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14 static char *ngx_http_v3_max_packet_size(ngx_conf_t *cf, void *post, |
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15 void *data); |
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16 |
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17 |
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18 static ngx_conf_post_t ngx_http_v3_max_ack_delay_post = |
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19 { ngx_http_v3_max_ack_delay }; |
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20 static ngx_conf_post_t ngx_http_v3_max_packet_size_post = |
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21 { ngx_http_v3_max_packet_size }; |
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22 static ngx_conf_num_bounds_t ngx_http_v3_ack_delay_exponent_bounds = |
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23 { ngx_conf_check_num_bounds, 0, 20 }; |
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24 static ngx_conf_num_bounds_t ngx_http_v3_active_connection_id_limit_bounds = |
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25 { ngx_conf_check_num_bounds, 2, -1 }; |
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26 |
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27 |
8215 | 28 static ngx_command_t ngx_http_v3_commands[] = { |
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29 |
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30 { ngx_string("quic_max_idle_timeout"), |
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31 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
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32 ngx_conf_set_msec_slot, |
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33 NGX_HTTP_SRV_CONF_OFFSET, |
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34 offsetof(ngx_http_v3_srv_conf_t, quic.max_idle_timeout), |
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35 NULL }, |
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36 |
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37 { ngx_string("quic_max_ack_delay"), |
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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_http_v3_srv_conf_t, quic.max_ack_delay), |
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42 &ngx_http_v3_max_ack_delay_post }, |
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43 |
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44 { ngx_string("quic_max_packet_size"), |
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45 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
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46 ngx_conf_set_size_slot, |
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47 NGX_HTTP_SRV_CONF_OFFSET, |
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48 offsetof(ngx_http_v3_srv_conf_t, quic.max_packet_size), |
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49 &ngx_http_v3_max_packet_size_post }, |
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50 |
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51 { ngx_string("quic_initial_max_data"), |
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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_http_v3_srv_conf_t, quic.initial_max_data), |
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56 NULL }, |
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57 |
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58 { ngx_string("quic_initial_max_stream_data_bidi_local"), |
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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_http_v3_srv_conf_t, quic.initial_max_stream_data_bidi_local), |
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63 NULL }, |
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64 |
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65 { ngx_string("quic_initial_max_stream_data_bidi_remote"), |
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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_http_v3_srv_conf_t, quic.initial_max_stream_data_bidi_remote), |
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70 NULL }, |
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71 |
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72 { ngx_string("quic_initial_max_stream_data_uni"), |
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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_http_v3_srv_conf_t, quic.initial_max_stream_data_uni), |
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77 NULL }, |
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78 |
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79 { ngx_string("quic_initial_max_streams_bidi"), |
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80 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
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81 ngx_conf_set_num_slot, |
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82 NGX_HTTP_SRV_CONF_OFFSET, |
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83 offsetof(ngx_http_v3_srv_conf_t, quic.initial_max_streams_bidi), |
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84 NULL }, |
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85 |
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86 { ngx_string("quic_initial_max_streams_uni"), |
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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_http_v3_srv_conf_t, quic.initial_max_streams_uni), |
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91 NULL }, |
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92 |
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93 { ngx_string("quic_ack_delay_exponent"), |
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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_http_v3_srv_conf_t, quic.ack_delay_exponent), |
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98 &ngx_http_v3_ack_delay_exponent_bounds }, |
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99 |
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100 { ngx_string("quic_active_migration"), |
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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_http_v3_srv_conf_t, quic.disable_active_migration), |
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105 NULL }, |
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106 |
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107 { ngx_string("quic_active_connection_id_limit"), |
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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_http_v3_srv_conf_t, quic.active_connection_id_limit), |
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112 &ngx_http_v3_active_connection_id_limit_bounds }, |
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113 |
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114 { ngx_string("quic_retry"), |
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115 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, |
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116 ngx_conf_set_flag_slot, |
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117 NGX_HTTP_SRV_CONF_OFFSET, |
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118 offsetof(ngx_http_v3_srv_conf_t, quic.retry), |
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119 NULL }, |
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120 |
8215 | 121 ngx_null_command |
122 }; | |
123 | |
124 | |
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125 static ngx_int_t ngx_http_variable_quic(ngx_http_request_t *r, |
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126 ngx_http_variable_value_t *v, uintptr_t data); |
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127 static ngx_int_t ngx_http_variable_http3(ngx_http_request_t *r, |
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128 ngx_http_variable_value_t *v, uintptr_t data); |
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129 static ngx_int_t ngx_http_v3_add_variables(ngx_conf_t *cf); |
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130 static void *ngx_http_v3_create_srv_conf(ngx_conf_t *cf); |
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131 static char *ngx_http_v3_merge_srv_conf(ngx_conf_t *cf, |
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132 void *parent, void *child); |
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133 |
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134 |
8215 | 135 static ngx_http_module_t ngx_http_v3_module_ctx = { |
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136 ngx_http_v3_add_variables, /* preconfiguration */ |
8215 | 137 NULL, /* postconfiguration */ |
138 | |
139 NULL, /* create main configuration */ | |
140 NULL, /* init main configuration */ | |
141 | |
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142 ngx_http_v3_create_srv_conf, /* create server configuration */ |
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143 ngx_http_v3_merge_srv_conf, /* merge server configuration */ |
8215 | 144 |
145 NULL, /* create location configuration */ | |
146 NULL /* merge location configuration */ | |
147 }; | |
148 | |
149 | |
150 ngx_module_t ngx_http_v3_module = { | |
151 NGX_MODULE_V1, | |
152 &ngx_http_v3_module_ctx, /* module context */ | |
153 ngx_http_v3_commands, /* module directives */ | |
154 NGX_HTTP_MODULE, /* module type */ | |
155 NULL, /* init master */ | |
156 NULL, /* init module */ | |
157 NULL, /* init process */ | |
158 NULL, /* init thread */ | |
159 NULL, /* exit thread */ | |
160 NULL, /* exit process */ | |
161 NULL, /* exit master */ | |
162 NGX_MODULE_V1_PADDING | |
163 }; | |
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164 |
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165 |
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166 static ngx_http_variable_t ngx_http_v3_vars[] = { |
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167 { ngx_string("quic"), NULL, ngx_http_variable_quic, |
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168 0, 0, 0 }, |
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169 |
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170 { ngx_string("http3"), NULL, ngx_http_variable_http3, |
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171 0, 0, 0 }, |
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172 |
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173 ngx_http_null_variable |
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174 }; |
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175 |
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176 |
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177 static ngx_int_t |
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178 ngx_http_variable_quic(ngx_http_request_t *r, |
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179 ngx_http_variable_value_t *v, uintptr_t data) |
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180 { |
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181 if (r->connection->qs) { |
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182 |
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183 v->len = 4; |
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184 v->valid = 1; |
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185 v->no_cacheable = 1; |
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186 v->not_found = 0; |
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187 v->data = (u_char *) "quic"; |
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188 return NGX_OK; |
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189 } |
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190 |
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191 v->not_found = 1; |
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192 |
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193 return NGX_OK; |
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194 } |
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195 |
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196 |
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197 static ngx_int_t |
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198 ngx_http_variable_http3(ngx_http_request_t *r, |
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199 ngx_http_variable_value_t *v, uintptr_t data) |
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200 { |
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201 v->valid = 1; |
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202 v->no_cacheable = 1; |
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203 v->not_found = 0; |
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204 |
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205 v->data = ngx_pnalloc(r->pool, sizeof("h3-xx") - 1); |
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206 if (v->data == NULL) { |
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207 return NGX_ERROR; |
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208 } |
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209 |
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210 v->len = ngx_sprintf(v->data, "h3-%d", NGX_QUIC_DRAFT_VERSION) - v->data; |
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211 |
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212 return NGX_OK; |
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213 } |
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214 |
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215 |
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216 static ngx_int_t |
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217 ngx_http_v3_add_variables(ngx_conf_t *cf) |
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218 { |
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219 ngx_http_variable_t *var, *v; |
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220 |
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221 for (v = ngx_http_v3_vars; v->name.len; v++) { |
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222 var = ngx_http_add_variable(cf, &v->name, v->flags); |
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223 if (var == NULL) { |
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224 return NGX_ERROR; |
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225 } |
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226 |
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227 var->get_handler = v->get_handler; |
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228 var->data = v->data; |
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229 } |
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230 |
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231 return NGX_OK; |
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232 } |
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233 |
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234 |
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235 |
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236 static void * |
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237 ngx_http_v3_create_srv_conf(ngx_conf_t *cf) |
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238 { |
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239 ngx_http_v3_srv_conf_t *v3cf; |
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240 |
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241 v3cf = ngx_pcalloc(cf->pool, sizeof(ngx_http_v3_srv_conf_t)); |
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242 if (v3cf == NULL) { |
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243 return NULL; |
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244 } |
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245 |
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246 /* |
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247 * set by ngx_pcalloc(): |
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248 * v3cf->quic.original_connection_id = 0; |
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249 * v3cf->quic.stateless_reset_token = { 0 } |
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250 * conf->quic.preferred_address = NULL |
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251 */ |
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252 |
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253 v3cf->quic.max_idle_timeout = NGX_CONF_UNSET_MSEC; |
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254 v3cf->quic.max_ack_delay = NGX_CONF_UNSET_MSEC; |
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255 |
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256 v3cf->quic.max_packet_size = NGX_CONF_UNSET_SIZE; |
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257 v3cf->quic.initial_max_data = NGX_CONF_UNSET_SIZE; |
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258 v3cf->quic.initial_max_stream_data_bidi_local = NGX_CONF_UNSET_SIZE; |
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259 v3cf->quic.initial_max_stream_data_bidi_remote = NGX_CONF_UNSET_SIZE; |
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260 v3cf->quic.initial_max_stream_data_uni = NGX_CONF_UNSET_SIZE; |
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261 v3cf->quic.initial_max_streams_bidi = NGX_CONF_UNSET_UINT; |
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262 v3cf->quic.initial_max_streams_uni = NGX_CONF_UNSET_UINT; |
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263 v3cf->quic.ack_delay_exponent = NGX_CONF_UNSET_UINT; |
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264 v3cf->quic.disable_active_migration = NGX_CONF_UNSET_UINT; |
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265 v3cf->quic.active_connection_id_limit = NGX_CONF_UNSET_UINT; |
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266 |
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267 v3cf->quic.retry = NGX_CONF_UNSET; |
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268 |
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269 return v3cf; |
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270 } |
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271 |
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272 |
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273 static char * |
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274 ngx_http_v3_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) |
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275 { |
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276 ngx_http_v3_srv_conf_t *prev = parent; |
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277 ngx_http_v3_srv_conf_t *conf = child; |
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278 |
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279 ngx_conf_merge_msec_value(conf->quic.max_idle_timeout, |
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280 prev->quic.max_idle_timeout, 60000); |
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281 |
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282 ngx_conf_merge_msec_value(conf->quic.max_ack_delay, |
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283 prev->quic.max_ack_delay, |
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284 NGX_QUIC_DEFAULT_MAX_ACK_DELAY); |
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285 |
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286 ngx_conf_merge_size_value(conf->quic.max_packet_size, |
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287 prev->quic.max_packet_size, |
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288 NGX_QUIC_DEFAULT_MAX_PACKET_SIZE); |
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289 |
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290 ngx_conf_merge_size_value(conf->quic.initial_max_data, |
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291 prev->quic.initial_max_data, |
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292 16 * NGX_QUIC_STREAM_BUFSIZE); |
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293 |
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294 ngx_conf_merge_size_value(conf->quic.initial_max_stream_data_bidi_local, |
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295 prev->quic.initial_max_stream_data_bidi_local, |
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296 NGX_QUIC_STREAM_BUFSIZE); |
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297 |
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298 ngx_conf_merge_size_value(conf->quic.initial_max_stream_data_bidi_remote, |
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299 prev->quic.initial_max_stream_data_bidi_remote, |
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300 NGX_QUIC_STREAM_BUFSIZE); |
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301 |
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302 ngx_conf_merge_size_value(conf->quic.initial_max_stream_data_uni, |
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303 prev->quic.initial_max_stream_data_uni, |
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304 NGX_QUIC_STREAM_BUFSIZE); |
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305 |
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306 ngx_conf_merge_uint_value(conf->quic.initial_max_streams_bidi, |
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307 prev->quic.initial_max_streams_bidi, 16); |
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308 |
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309 ngx_conf_merge_uint_value(conf->quic.initial_max_streams_uni, |
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310 prev->quic.initial_max_streams_uni, 16); |
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311 |
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312 ngx_conf_merge_uint_value(conf->quic.ack_delay_exponent, |
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313 prev->quic.ack_delay_exponent, |
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314 NGX_QUIC_DEFAULT_ACK_DELAY_EXPONENT); |
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315 |
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316 ngx_conf_merge_uint_value(conf->quic.disable_active_migration, |
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317 prev->quic.disable_active_migration, 1); |
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318 |
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319 ngx_conf_merge_uint_value(conf->quic.active_connection_id_limit, |
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320 prev->quic.active_connection_id_limit, 2); |
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321 |
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322 ngx_conf_merge_value(conf->quic.retry, prev->quic.retry, 0); |
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323 |
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324 if (conf->quic.retry) { |
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325 if (RAND_bytes(conf->quic.token_key, sizeof(conf->quic.token_key)) <= 0) { |
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326 return NGX_CONF_ERROR; |
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327 } |
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328 } |
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329 |
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330 |
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331 return NGX_CONF_OK; |
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332 } |
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333 |
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334 |
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335 static char * |
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336 ngx_http_v3_max_ack_delay(ngx_conf_t *cf, void *post, void *data) |
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337 { |
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338 ngx_msec_t *sp = data; |
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339 |
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340 if (*sp > 16384) { |
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341 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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342 "\"quic_max_ack_delay\" must be less than 16384"); |
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343 |
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344 return NGX_CONF_ERROR; |
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345 } |
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346 |
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347 return NGX_CONF_OK; |
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348 } |
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349 |
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350 |
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351 static char * |
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|
352 ngx_http_v3_max_packet_size(ngx_conf_t *cf, void *post, void *data) |
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353 { |
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354 size_t *sp = data; |
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355 |
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|
356 if (*sp < NGX_QUIC_MIN_INITIAL_SIZE |
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357 || *sp > NGX_QUIC_DEFAULT_MAX_PACKET_SIZE) |
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358 { |
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359 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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360 "\"quic_max_packet_size\" must be between %d and %d", |
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|
361 NGX_QUIC_MIN_INITIAL_SIZE, |
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|
362 NGX_QUIC_DEFAULT_MAX_PACKET_SIZE); |
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|
363 |
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364 return NGX_CONF_ERROR; |
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365 } |
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366 |
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367 return NGX_CONF_OK; |
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|
368 } |