annotate README @ 9030:172705615d04 quic

QUIC: using native TLSv1.3 cipher suite constants. After BoringSSL aligned[1] with OpenSSL on TLS1_3_CK_* macros, and LibreSSL uses OpenSSL naming, our own variants can be dropped now. Compatibility is preserved with libraries that lack these macros. Additionally, transition to SSL_CIPHER_get_id() fixes build error with LibreSSL that doesn't implement SSL_CIPHER_get_protocol_id(). [1] https://boringssl.googlesource.com/boringssl/+/dfddbc4ded
author Sergey Kandaurov <pluknet@nginx.com>
date Thu, 20 Oct 2022 16:21:05 +0400
parents 98e94553ae51
children 79cd6993a3e3
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1 Experimental QUIC support for nginx
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2 -----------------------------------
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3
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4 1. Introduction
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5 2. Installing
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6 3. Configuration
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7 4. Clients
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8 5. Troubleshooting
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9 6. Contributing
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10 7. Links
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11
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12 1. Introduction
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13
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14 This is an experimental QUIC [1] / HTTP/3 [2] support for nginx.
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15
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16 The code is developed in a separate "quic" branch available
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17 at https://hg.nginx.org/nginx-quic. Currently it is based
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18 on nginx mainline 1.23.x. We merge new nginx releases into
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19 this branch regularly.
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21 The project code base is under the same BSD license as nginx.
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22
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23 The code is currently at a beta level of quality, however
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24 there are several production deployments with it.
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26 We are working on improving HTTP/3 support to integrate it into
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27 the main NGINX codebase. Thus, expect further updates of this code,
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28 including features, changes in behaviour, bug fixes, and refactoring.
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29 We'll be grateful for any feedback and code submissions.
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31 You can always contact us via nginx-devel mailing list [3].
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32
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33 What works now:
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34
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35 We support IETF QUIC version 1. Internet drafts are no longer supported.
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36
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37 nginx should be able to respond to HTTP/3 requests over QUIC and
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38 it should be possible to upload and download big files without errors.
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39
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40 + The handshake completes successfully
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41 + One endpoint can update keys and its peer responds correctly
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42 + 0-RTT data is being received and acted on
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43 + Connection is established using TLS Resume Ticket
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44 + A handshake that includes a Retry packet completes successfully
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45 + Stream data is being exchanged and ACK'ed
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46 + An H3 transaction succeeded
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47 + One or both endpoints insert entries into dynamic table and
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48 subsequently reference them from header blocks
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49 + Version Negotiation packet is sent to client with unknown version
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50 + Lost packets are detected and retransmitted properly
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51 + Clients may migrate to new address
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52
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53 2. Installing
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54
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55 You will need a BoringSSL [4] library that provides QUIC support
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56
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57 $ hg clone -b quic https://hg.nginx.org/nginx-quic
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58 $ cd nginx-quic
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59 $ ./auto/configure --with-debug --with-http_v3_module \
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60 --with-cc-opt="-I../boringssl/include" \
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61 --with-ld-opt="-L../boringssl/build/ssl \
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62 -L../boringssl/build/crypto"
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63 $ make
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64
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65 Alternatively, nginx can be configured with QuicTLS [5]
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66
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67 $ ./auto/configure --with-debug --with-http_v3_module \
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68 --with-cc-opt="-I../quictls/build/include" \
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69 --with-ld-opt="-L../quictls/build/lib"
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71 When configuring nginx, you can enable QUIC and HTTP/3 using the
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72 following new configuration options:
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73
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74 --with-http_v3_module - enable QUIC and HTTP/3
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75 --with-stream_quic_module - enable QUIC in Stream
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77 3. Configuration
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78
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79 The HTTP "listen" directive got a new option "http3" which enables
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80 HTTP/3 over QUIC on the specified port.
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81
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82 The Stream "listen" directive got a new option "quic" which enables
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83 QUIC as client transport protocol instead of TCP or plain UDP.
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84
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85 Along with "http3" or "quic", you also have to specify "reuseport"
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86 option [6] to make it work properly with multiple workers.
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87
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88 To enable address validation:
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89
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90 quic_retry on;
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91
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92 To enable 0-RTT:
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93
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94 ssl_early_data on;
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95
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96 Make sure that TLS 1.3 is configured which is required for QUIC:
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97
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98 ssl_protocols TLSv1.3;
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99
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100 To enable GSO (Generic Segmentation Offloading):
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101
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102 quic_gso on;
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103
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104 To limit maximum UDP payload size on receive path:
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105
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106 quic_mtu <size>;
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107
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108 To set host key for various tokens:
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109
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110 quic_host_key <filename>;
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111
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112
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113 By default, GSO Linux-specific optimization [8] is disabled.
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114 Enable if your network interface is configured to support GSO.
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115
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116 A number of directives were added that configure HTTP/3:
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117
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118 http3_stream_buffer_size
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119 http3_max_concurrent_pushes
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120 http3_max_concurrent_streams
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121 http3_push
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122 http3_push_preload
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123 http3_hq (requires NGX_HTTP_V3_HQ macro)
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124
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125 In http, an additional variable is available: $http3.
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126 The value of $http3 is "h3" for HTTP/3 connections,
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127 "hq" for hq connections, or an empty string otherwise.
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128
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129 In stream, an additional variable is available: $quic.
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130 The value of $quic is "quic" if QUIC connection is used,
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131 or an empty string otherwise.
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132
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133 Example configuration:
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134
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135 http {
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136 log_format quic '$remote_addr - $remote_user [$time_local] '
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137 '"$request" $status $body_bytes_sent '
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138 '"$http_referer" "$http_user_agent" "$http3"';
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139
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140 access_log logs/access.log quic;
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141
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142 server {
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143 # for better compatibility it's recommended
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144 # to use the same port for quic and https
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145 listen 8443 http3 reuseport;
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146 listen 8443 ssl;
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147
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148 ssl_certificate certs/example.com.crt;
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149 ssl_certificate_key certs/example.com.key;
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150 ssl_protocols TLSv1.3;
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151
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152 location / {
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153 # required for browsers to direct them into quic port
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154 add_header Alt-Svc 'h3=":8443"; ma=86400';
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155 }
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156 }
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157 }
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158
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159 4. Clients
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160
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161 * Browsers
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162
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163 Known to work: Firefox 90+ and Chrome 92+ (QUIC version 1)
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164
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165 Beware of strange issues: sometimes browser may decide to ignore QUIC
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166 Cache clearing/restart might help. Always check access.log and
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167 error.log to make sure you are using HTTP/3 and not TCP https.
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168
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169 * Console clients
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170
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171 Known to work: ngtcp2, firefox's neqo and chromium's console clients:
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172
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173 $ examples/client 127.0.0.1 8443 https://example.com:8443/index.html
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174
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175 $ ./neqo-client https://127.0.0.1:8443/
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176
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177 $ chromium-build/out/my_build/quic_client http://example.com:8443
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178
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179
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180 If you've got it right, in the access log you should see something like:
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181
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182 127.0.0.1 - - [24/Apr/2020:11:27:29 +0300] "GET / HTTP/3" 200 805 "-"
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183 "nghttp3/ngtcp2 client" "quic"
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184
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185
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186 5. Troubleshooting
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187
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188 Here are some tips that may help you to identify problems:
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189
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190 + Ensure you are building with proper SSL library that supports QUIC
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191
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192 + Ensure you are using the proper SSL library in runtime
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193 (`nginx -V` will show you what you are using)
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194
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195 + Ensure your client is actually sending requests over QUIC
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196 (see "Clients" section about browsers and cache)
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197
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198 We recommend to start with simple console client like ngtcp2
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199 to ensure you've got server configured properly before trying
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200 with real browsers that may be very picky with certificates,
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201 for example.
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202
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203 + Build nginx with debug support [7] and check your debug log.
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204 It should contain all details about connection and why it
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205 failed. All related messages contain "quic " prefix and can
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206 be easily filtered out.
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207
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208 + If you want to investigate deeper, you may want to enable
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209 additional debugging in src/event/quic/ngx_event_quic_connection.h:
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210
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211 #define NGX_QUIC_DEBUG_PACKETS
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212 #define NGX_QUIC_DEBUG_FRAMES
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213 #define NGX_QUIC_DEBUG_ALLOC
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214 #define NGX_QUIC_DEBUG_CRYPTO
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215
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216 6. Contributing
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217
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218 If you are willing to contribute, please refer to
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219 http://nginx.org/en/docs/contributing_changes.html
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220
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221 7. Links
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222
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223 [1] https://datatracker.ietf.org/doc/html/rfc9000
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224 [2] https://datatracker.ietf.org/doc/html/rfc9114
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225 [3] https://mailman.nginx.org/mailman3/lists/nginx-devel.nginx.org/
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226 [4] https://boringssl.googlesource.com/boringssl/
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227 [5] https://github.com/quictls/openssl
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228 [6] https://nginx.org/en/docs/http/ngx_http_core_module.html#listen
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229 [7] https://nginx.org/en/docs/debugging_log.html
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230 [8] http://vger.kernel.org/lpc_net2018_talks/willemdebruijn-lpc2018-udpgso-paper-DRAFT-1.pdf