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annotate README @ 9074:93876a4c3b27 quic
README: fixed toc.
While here, updated link to mailman.
author | Sergey Kandaurov <pluknet@nginx.com> |
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date | Mon, 13 Feb 2023 13:41:35 +0400 |
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children | 7da4791e0264 |
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8366 | 1 Experimental QUIC support for nginx |
2 ----------------------------------- | |
3 | |
4 1. Introduction | |
9074 | 5 2. Building from sources |
8366 | 6 3. Configuration |
9074 | 7 4. Directives |
8 5. Clients | |
9 6. Troubleshooting | |
10 7. Contributing | |
11 8. Links | |
8366 | 12 |
13 1. Introduction | |
14 | |
15 This is an experimental QUIC [1] / HTTP/3 [2] support for nginx. | |
16 | |
17 The code is developed in a separate "quic" branch available | |
18 at https://hg.nginx.org/nginx-quic. Currently it is based | |
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19 on nginx mainline 1.23.x. We merge new nginx releases into |
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20 this branch regularly. |
8366 | 21 |
22 The project code base is under the same BSD license as nginx. | |
23 | |
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24 The code is currently at a beta level of quality, however |
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25 there are several production deployments with it. |
8366 | 26 |
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27 NGINX Development Team is working on improving HTTP/3 support to |
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28 integrate it into the main NGINX codebase. Thus, expect further |
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29 updates of this code, including features, changes in behaviour, |
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30 bug fixes, and refactoring. NGINX Development team will be |
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31 grateful for any feedback and code submissions. |
8366 | 32 |
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33 Please contact NGINX Development Team via nginx-devel mailing list [3]. |
8366 | 34 |
35 What works now: | |
36 | |
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37 IETF QUIC version 1 is supported. Internet drafts are no longer supported. |
8366 | 38 |
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39 nginx should be able to respond to HTTP/3 requests over QUIC and |
8366 | 40 it should be possible to upload and download big files without errors. |
41 | |
42 + The handshake completes successfully | |
43 + One endpoint can update keys and its peer responds correctly | |
8390 | 44 + 0-RTT data is being received and acted on |
8366 | 45 + Connection is established using TLS Resume Ticket |
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46 + A handshake that includes a Retry packet completes successfully |
8366 | 47 + Stream data is being exchanged and ACK'ed |
48 + An H3 transaction succeeded | |
49 + One or both endpoints insert entries into dynamic table and | |
50 subsequently reference them from header blocks | |
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52 + Lost packets are detected and retransmitted properly | |
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53 + Clients may migrate to new address |
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55 2. Building from sources |
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56 |
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57 The build is configured using the configure command. |
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58 Refer to http://nginx.org/en/docs/configure.html for details. |
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59 |
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60 When configuring nginx, it's possible to enable QUIC and HTTP/3 |
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61 using the following new configuration options: |
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62 |
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63 --with-http_v3_module - enable QUIC and HTTP/3 |
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64 --with-stream_quic_module - enable QUIC in Stream |
8366 | 65 |
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66 A library that provides QUIC support is required to build nginx, there |
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67 are several of those available on the market: |
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68 + BoringSSL [4] |
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69 + LibreSSL [5] |
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70 + QuicTLS [6] |
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71 |
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72 Clone the NGINX QUIC repository |
8366 | 73 |
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74 $ hg clone -b quic https://hg.nginx.org/nginx-quic |
8366 | 75 $ cd nginx-quic |
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76 |
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77 Use the following command to configure nginx with BoringSSL [4] |
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78 |
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79 $ ./auto/configure --with-debug --with-http_v3_module \ |
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80 --with-cc-opt="-I../boringssl/include" \ |
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81 --with-ld-opt="-L../boringssl/build/ssl \ |
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82 -L../boringssl/build/crypto" |
8366 | 83 $ make |
84 | |
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85 Alternatively, nginx can be configured with QuicTLS [6] |
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86 |
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87 $ ./auto/configure --with-debug --with-http_v3_module \ |
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88 --with-cc-opt="-I../quictls/build/include" \ |
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89 --with-ld-opt="-L../quictls/build/lib" |
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90 |
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91 Alternatively, nginx can be configured with a modern version |
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92 of LibreSSL [7] |
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93 |
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94 $ ./auto/configure --with-debug --with-http_v3_module \ |
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95 --with-cc-opt="-I../libressl/build/include" \ |
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96 --with-ld-opt="-L../libressl/build/lib" |
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97 |
8366 | 98 3. Configuration |
99 | |
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100 The HTTP "listen" directive got a new option "http3" which enables |
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101 HTTP/3 over QUIC on the specified port. |
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103 The Stream "listen" directive got a new option "quic" which enables |
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104 QUIC as client transport protocol instead of TCP or plain UDP. |
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105 |
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106 Along with "http3" or "quic", it's also possible to specify "reuseport" |
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107 option [8] to make it work properly with multiple workers. |
8366 | 108 |
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109 To enable address validation: |
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110 |
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111 quic_retry on; |
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112 |
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113 To enable 0-RTT: |
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114 |
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115 ssl_early_data on; |
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116 |
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117 Make sure that TLS 1.3 is configured which is required for QUIC: |
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118 |
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119 ssl_protocols TLSv1.3; |
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120 |
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121 To enable GSO (Generic Segmentation Offloading): |
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122 |
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123 quic_gso on; |
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124 |
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125 To limit maximum UDP payload size on receive path: |
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126 |
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127 quic_mtu <size>; |
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128 |
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129 To set host key for various tokens: |
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130 |
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131 quic_host_key <filename>; |
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132 |
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133 |
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134 By default, GSO Linux-specific optimization [10] is disabled. |
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135 Enable it in case a corresponding network interface is configured to |
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136 support GSO. |
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137 |
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138 A number of directives were added that configure HTTP/3: |
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139 |
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140 http3_stream_buffer_size |
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141 http3_max_concurrent_pushes |
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142 http3_max_concurrent_streams |
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143 http3_push |
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144 http3_push_preload |
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145 http3_hq (requires NGX_HTTP_V3_HQ macro) |
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146 |
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147 In http, an additional variable is available: $http3. |
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148 The value of $http3 is "h3" for HTTP/3 connections, |
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149 "hq" for hq connections, or an empty string otherwise. |
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150 |
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151 In stream, an additional variable is available: $quic. |
8366 | 152 The value of $quic is "quic" if QUIC connection is used, |
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153 or an empty string otherwise. |
8366 | 154 |
155 Example configuration: | |
156 | |
157 http { | |
158 log_format quic '$remote_addr - $remote_user [$time_local] ' | |
159 '"$request" $status $body_bytes_sent ' | |
8929 | 160 '"$http_referer" "$http_user_agent" "$http3"'; |
8366 | 161 |
162 access_log logs/access.log quic; | |
163 | |
164 server { | |
165 # for better compatibility it's recommended | |
166 # to use the same port for quic and https | |
167 listen 8443 http3 reuseport; | |
168 listen 8443 ssl; | |
169 | |
170 ssl_certificate certs/example.com.crt; | |
171 ssl_certificate_key certs/example.com.key; | |
172 ssl_protocols TLSv1.3; | |
173 | |
174 location / { | |
175 # required for browsers to direct them into quic port | |
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176 add_header Alt-Svc 'h3=":8443"; ma=86400'; |
8366 | 177 } |
178 } | |
179 } | |
180 | |
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181 4. Directives |
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182 |
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183 Syntax: quic_bpf on | off; |
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184 Default: quic_bpf off; |
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185 Context: main |
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186 |
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187 Enables routing of QUIC packets using eBPF. |
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188 When enabled, this allows to support QUIC connection migration. |
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189 The directive is only supported on Linux 5.7+. |
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190 |
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191 |
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192 Syntax: quic_retry on | off; |
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193 Default: quic_retry off; |
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194 Context: http | stream, server |
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195 |
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196 Enables the QUIC Address Validation feature. This includes: |
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197 - sending a new token in a Retry packet or a NEW_TOKEN frame |
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198 - validating a token received in the Initial packet |
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199 |
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200 |
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201 Syntax: quic_gso on | off; |
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202 Default: quic_gso off; |
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203 Context: http | stream, server |
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204 |
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205 Enables sending in optimized batch mode using segmentation offloading. |
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206 Optimized sending is only supported on Linux featuring UDP_SEGMENT. |
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207 |
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208 |
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209 Syntax: quic_mtu size; |
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210 Default: quic_mtu 65527; |
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211 Context: http | stream, server |
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212 |
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213 Sets the QUIC max_udp_payload_size transport parameter value. |
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214 This is the maximum UDP payload that we are willing to receive. |
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215 |
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216 |
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217 Syntax: quic_host_key file; |
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218 Default: - |
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219 Context: http | stream, server |
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220 |
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221 Specifies a file with the secret key used to encrypt stateless reset and |
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222 address validation tokens. By default, a randomly generated key is used. |
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223 |
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224 |
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225 Syntax: quic_active_connection_id_limit number; |
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226 Default: quic_active_connection_id_limit 2; |
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227 Context: http | stream, server |
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228 |
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229 Sets the QUIC active_connection_id_limit transport parameter value. |
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230 This is the maximum number of connection IDs we are willing to store. |
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231 |
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232 |
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233 Syntax: quic_timeout time; |
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234 Default: quic_timeout 60s; |
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235 Context: stream, server |
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236 |
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237 Defines a timeout used to negotiate the QUIC idle timeout. |
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238 In the http module, it is taken from the keepalive_timeout directive. |
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239 |
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240 |
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241 Syntax: quic_stream_buffer_size size; |
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242 Default: quic_stream_buffer_size 64k; |
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243 Context: stream, server |
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244 |
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245 Syntax: http3_stream_buffer_size size; |
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246 Default: http3_stream_buffer_size 64k; |
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247 Context: http, server |
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248 |
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249 Sets buffer size for reading and writing of the QUIC STREAM payload. |
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250 The buffer size is used to calculate initial flow control limits |
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251 in the following QUIC transport parameters: |
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252 - initial_max_data |
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253 - initial_max_stream_data_bidi_local |
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254 - initial_max_stream_data_bidi_remote |
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255 - initial_max_stream_data_uni |
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256 |
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257 |
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258 Syntax: http3_max_concurrent_pushes number; |
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259 Default: http3_max_concurrent_pushes 10; |
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260 Context: http, server |
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261 |
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262 Limits the maximum number of concurrent push requests in a connection. |
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263 |
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264 |
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265 Syntax: http3_max_concurrent_streams number; |
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266 Default: http3_max_concurrent_streams 128; |
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267 Context: http, server |
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268 |
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269 Sets the maximum number of concurrent HTTP/3 streams in a connection. |
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270 |
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271 |
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272 Syntax: http3_push uri | off; |
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273 Default: http3_push off; |
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274 Context: http, server, location |
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275 |
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276 Pre-emptively sends (pushes) a request to the specified uri along with |
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277 the response to the original request. Only relative URIs with absolute |
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278 path will be processed, for example: |
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279 |
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280 http3_push /static/css/main.css; |
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281 |
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282 The uri value can contain variables. |
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283 |
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284 Several http3_push directives can be specified on the same configuration |
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285 level. The off parameter cancels the effect of the http3_push directives |
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286 inherited from the previous configuration level. |
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287 |
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288 |
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289 Syntax: http3_push_preload on | off; |
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290 Default: http3_push_preload off; |
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291 Context: http, server, location |
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292 |
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293 Enables automatic conversion of preload links specified in the “Link” |
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294 response header fields into push requests. |
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295 |
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296 |
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297 Syntax: http3_hq on | off; |
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298 Default: http3_hq off; |
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299 Context: http, server |
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300 |
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301 Enables HTTP/0.9 protocol negotiation used in QUIC interoperability tests. |
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302 |
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303 5. Clients |
8366 | 304 |
305 * Browsers | |
306 | |
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307 Known to work: Firefox 90+ and Chrome 92+ (QUIC version 1) |
8366 | 308 |
309 Beware of strange issues: sometimes browser may decide to ignore QUIC | |
310 Cache clearing/restart might help. Always check access.log and | |
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311 error.log to make sure the browser is using HTTP/3 and not TCP https. |
8366 | 312 |
313 * Console clients | |
314 | |
315 Known to work: ngtcp2, firefox's neqo and chromium's console clients: | |
316 | |
317 $ examples/client 127.0.0.1 8443 https://example.com:8443/index.html | |
318 | |
319 $ ./neqo-client https://127.0.0.1:8443/ | |
320 | |
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321 $ chromium-build/out/my_build/quic_client http://example.com:8443 |
8366 | 322 |
323 | |
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324 In case everyhing is right, the access log should show something like: |
8366 | 325 |
326 127.0.0.1 - - [24/Apr/2020:11:27:29 +0300] "GET / HTTP/3" 200 805 "-" | |
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327 "nghttp3/ngtcp2 client" "quic" |
8366 | 328 |
329 | |
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330 6. Troubleshooting |
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332 Here are some tips that may help to identify problems: |
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334 + Ensure nginx is built with proper SSL library that supports QUIC |
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336 + Ensure nginx is using the proper SSL library in runtime |
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337 (`nginx -V` shows what it's using) |
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339 + Ensure a client is actually sending requests over QUIC |
8366 | 340 (see "Clients" section about browsers and cache) |
341 | |
342 We recommend to start with simple console client like ngtcp2 | |
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343 to ensure the server is configured properly before trying |
8395 | 344 with real browsers that may be very picky with certificates, |
8366 | 345 for example. |
346 | |
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347 + Build nginx with debug support [9] and check the debug log. |
8366 | 348 It should contain all details about connection and why it |
349 failed. All related messages contain "quic " prefix and can | |
350 be easily filtered out. | |
351 | |
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352 + For a deeper investigation, please enable additional debugging |
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353 in src/event/quic/ngx_event_quic_connection.h: |
8366 | 354 |
355 #define NGX_QUIC_DEBUG_PACKETS | |
356 #define NGX_QUIC_DEBUG_FRAMES | |
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357 #define NGX_QUIC_DEBUG_ALLOC |
8366 | 358 #define NGX_QUIC_DEBUG_CRYPTO |
359 | |
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360 7. Contributing |
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361 |
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362 Please refer to |
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363 http://nginx.org/en/docs/contributing_changes.html |
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364 |
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365 8. Links |
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367 [1] https://datatracker.ietf.org/doc/html/rfc9000 |
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368 [2] https://datatracker.ietf.org/doc/html/rfc9114 |
9074 | 369 [3] https://mailman.nginx.org/mailman/listinfo/nginx-devel |
8366 | 370 [4] https://boringssl.googlesource.com/boringssl/ |
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371 [5] https://www.libressl.org/ |
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372 [6] https://github.com/quictls/openssl |
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373 [7] https://github.com/libressl-portable/portable/releases/tag/v3.6.0 |
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374 [8] https://nginx.org/en/docs/http/ngx_http_core_module.html#listen |
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375 [9] https://nginx.org/en/docs/debugging_log.html |
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376 [10] http://vger.kernel.org/lpc_net2018_talks/willemdebruijn-lpc2018-udpgso-paper-DRAFT-1.pdf |