Mercurial > hg > nginx-quic
annotate README @ 8721:501f28679d56 quic
QUIC: refactored ngx_quic_frame_sendto() function.
The function now takes path as an argument to deal with associated
restrictions and update sent counter.
author | Vladimir Homutov <vl@nginx.com> |
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date | Thu, 09 Dec 2021 12:40:14 +0300 |
parents | 44553428288d |
children | 6f8253673669 |
rev | line source |
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7843 | 1 Experimental QUIC support for nginx |
2 ----------------------------------- | |
3 | |
4 1. Introduction | |
5 2. Installing | |
6 3. Configuration | |
7 4. Clients | |
8 5. Troubleshooting | |
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9 6. Contributing |
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10 7. Links |
7843 | 11 |
12 1. Introduction | |
13 | |
14 This is an experimental QUIC [1] / HTTP/3 [2] support for nginx. | |
15 | |
16 The code is developed in a separate "quic" branch available | |
17 at https://hg.nginx.org/nginx-quic. Currently it is based | |
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18 on nginx mainline 1.21.x. We merge new nginx releases into |
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19 this branch regularly. |
7843 | 20 |
21 The project code base is under the same BSD license as nginx. | |
22 | |
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23 The code is currently at a beta level of quality and should not |
7843 | 24 be used in production. |
25 | |
26 We are working on improving HTTP/3 support with the goal of | |
27 integrating it to the main NGINX codebase. Expect frequent | |
28 updates of this code and don't rely on it for whatever purpose. | |
29 | |
30 We'll be grateful for any feedback and code submissions however | |
31 we don't bear any responsibilities for any issues with this code. | |
32 | |
33 You can always contact us via nginx-devel mailing list [3]. | |
34 | |
35 What works now: | |
36 | |
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37 Currently we support IETF-QUIC draft-29 through final RFC documents. |
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38 Earlier drafts are NOT supported as they have incompatible wire format. |
7843 | 39 |
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40 nginx should be able to respond to HTTP/3 requests over QUIC and |
7843 | 41 it should be possible to upload and download big files without errors. |
42 | |
43 + The handshake completes successfully | |
44 + One endpoint can update keys and its peer responds correctly | |
7867 | 45 + 0-RTT data is being received and acted on |
7843 | 46 + Connection is established using TLS Resume Ticket |
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47 + A handshake that includes a Retry packet completes successfully |
7843 | 48 + Stream data is being exchanged and ACK'ed |
49 + An H3 transaction succeeded | |
50 + One or both endpoints insert entries into dynamic table and | |
51 subsequently reference them from header blocks | |
8065 | 52 + Version Negotiation packet is sent to client with unknown version |
53 + Lost packets are detected and retransmitted properly | |
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54 + Clients may migrate to new address |
7843 | 55 |
56 Not (yet) supported features: | |
57 | |
8065 | 58 - Explicit Congestion Notification (ECN) as specified in quic-recovery [5] |
7843 | 59 - A connection with the spin bit succeeds and the bit is spinning |
60 - Structured Logging | |
61 | |
62 Since the code is experimental and still under development, | |
63 a lot of things may not work as expected, for example: | |
64 | |
65 - Flow control mechanism is basic and intended to avoid CPU hog and make | |
66 simple interactions possible | |
67 | |
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68 - Not all protocol requirements are strictly followed; some of checks are |
7843 | 69 omitted for the sake of simplicity of initial implementation |
70 | |
71 2. Installing | |
72 | |
73 You will need a BoringSSL [4] library that provides QUIC support | |
74 | |
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75 $ hg clone -b quic https://hg.nginx.org/nginx-quic |
7843 | 76 $ cd nginx-quic |
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77 $ ./auto/configure --with-debug --with-http_v3_module \ |
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78 --with-cc-opt="-I../boringssl/include" \ |
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79 --with-ld-opt="-L../boringssl/build/ssl \ |
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80 -L../boringssl/build/crypto" |
7843 | 81 $ make |
82 | |
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83 When configuring nginx, you can enable QUIC and HTTP/3 using the |
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84 following new configuration options: |
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85 |
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86 --with-http_v3_module - enable QUIC and HTTP/3 |
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87 --with-stream_quic_module - enable QUIC in Stream |
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88 |
7843 | 89 3. Configuration |
90 | |
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91 The HTTP "listen" directive got a new option "http3" which enables |
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92 HTTP/3 over QUIC on the specified port. |
7843 | 93 |
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94 The Stream "listen" directive got a new option "quic" which enables |
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95 QUIC as client transport protocol instead of TCP or plain UDP. |
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96 |
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97 Along with "http3" or "quic", you also have to specify "reuseport" |
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98 option [6] to make it work properly with multiple workers. |
7843 | 99 |
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100 To enable address validation: |
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101 |
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102 quic_retry on; |
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103 |
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104 To enable 0-RTT: |
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105 |
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106 ssl_early_data on; |
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107 |
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108 Make sure that TLS 1.3 is configured which is required for QUIC: |
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109 |
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110 ssl_protocols TLSv1.3; |
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111 |
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112 To enable GSO (Generic Segmentation Offloading): |
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113 |
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114 quic_gso on; |
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115 |
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116 To limit maximum packet size: |
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117 |
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118 quic_mtu <size>; |
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119 |
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120 To set host key for various tokens: |
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121 |
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122 quic_host_key <filename>; |
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123 |
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124 |
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125 By default this Linux-specific optimization [8] is disabled. |
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126 Enable if your network interface is configured to support GSO. |
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127 |
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128 A number of directives were added that configure HTTP/3: |
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129 |
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130 http3_stream_buffer_size |
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131 http3_max_concurrent_pushes |
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132 http3_max_concurrent_streams |
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133 http3_push |
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134 http3_push_preload |
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135 http3_hq (requires NGX_HTTP_V3_HQ macro) |
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136 |
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137 In http, an additional variable is available: $http3. |
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138 The value of $http3 is "h3" for HTTP/3 connections, |
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139 "hq" for hq connections, or an empty string otherwise. |
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140 |
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141 In stream, an additional variable is available: $quic. |
7843 | 142 The value of $quic is "quic" if QUIC connection is used, |
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143 or an empty string otherwise. |
7843 | 144 |
145 Example configuration: | |
146 | |
147 http { | |
148 log_format quic '$remote_addr - $remote_user [$time_local] ' | |
149 '"$request" $status $body_bytes_sent ' | |
8718 | 150 '"$http_referer" "$http_user_agent" "$http3"'; |
7843 | 151 |
152 access_log logs/access.log quic; | |
153 | |
154 server { | |
155 # for better compatibility it's recommended | |
156 # to use the same port for quic and https | |
157 listen 8443 http3 reuseport; | |
158 listen 8443 ssl; | |
159 | |
160 ssl_certificate certs/example.com.crt; | |
161 ssl_certificate_key certs/example.com.key; | |
162 ssl_protocols TLSv1.3; | |
163 | |
164 location / { | |
165 # required for browsers to direct them into quic port | |
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166 add_header Alt-Svc 'h3=":8443"; ma=86400'; |
7843 | 167 } |
168 } | |
169 } | |
170 | |
171 4. Clients | |
172 | |
173 * Browsers | |
174 | |
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175 Known to work: Firefox 80+ and Chrome 85+ (QUIC draft 29+) |
7843 | 176 |
177 Beware of strange issues: sometimes browser may decide to ignore QUIC | |
178 Cache clearing/restart might help. Always check access.log and | |
179 error.log to make sure you are using HTTP/3 and not TCP https. | |
180 | |
181 + to enable QUIC in Firefox, set the following in 'about:config': | |
182 network.http.http3.enabled = true | |
183 | |
184 + to enable QUIC in Chrome, enable it on command line and force it | |
185 on your site: | |
186 | |
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187 $ ./chrome --enable-quic --quic-version=h3-29 \ |
7843 | 188 --origin-to-force-quic-on=example.com:8443 |
189 | |
190 * Console clients | |
191 | |
192 Known to work: ngtcp2, firefox's neqo and chromium's console clients: | |
193 | |
194 $ examples/client 127.0.0.1 8443 https://example.com:8443/index.html | |
195 | |
196 $ ./neqo-client https://127.0.0.1:8443/ | |
197 | |
198 $ chromium-build/out/my_build/quic_client http://example.com:8443 \ | |
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199 --quic_version=h3-29 \ |
7843 | 200 --allow_unknown_root_cert \ |
201 --disable_certificate_verification | |
202 | |
203 | |
204 If you've got it right, in the access log you should see something like: | |
205 | |
206 127.0.0.1 - - [24/Apr/2020:11:27:29 +0300] "GET / HTTP/3" 200 805 "-" | |
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207 "nghttp3/ngtcp2 client" "quic" |
7843 | 208 |
209 | |
210 5. Troubleshooting | |
211 | |
212 Here are some tips that may help you to identify problems: | |
213 | |
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214 + Ensure you are building with proper SSL library that supports QUIC |
7843 | 215 |
216 + Ensure you are using the proper SSL library in runtime | |
217 (`nginx -V` will show you what you are using) | |
218 | |
219 + Ensure your client is actually sending QUIC requests | |
220 (see "Clients" section about browsers and cache) | |
221 | |
222 We recommend to start with simple console client like ngtcp2 | |
223 to ensure you've got server configured properly before trying | |
7872 | 224 with real browsers that may be very picky with certificates, |
7843 | 225 for example. |
226 | |
227 + Build nginx with debug support [7] and check your debug log. | |
228 It should contain all details about connection and why it | |
229 failed. All related messages contain "quic " prefix and can | |
230 be easily filtered out. | |
231 | |
232 + If you want to investigate deeper, you may want to enable | |
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233 additional debugging in src/event/quic/ngx_event_quic_connection.h: |
7843 | 234 |
235 #define NGX_QUIC_DEBUG_PACKETS | |
236 #define NGX_QUIC_DEBUG_FRAMES | |
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237 #define NGX_QUIC_DEBUG_ALLOC |
7843 | 238 #define NGX_QUIC_DEBUG_CRYPTO |
239 | |
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240 6. Contributing |
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241 |
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242 If you are willing to contribute, please refer to |
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243 http://nginx.org/en/docs/contributing_changes.html |
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244 |
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245 7. Links |
7843 | 246 |
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247 [1] https://datatracker.ietf.org/doc/html/rfc9000 |
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248 [2] https://datatracker.ietf.org/doc/html/draft-ietf-quic-http |
7843 | 249 [3] https://mailman.nginx.org/mailman/listinfo/nginx-devel |
250 [4] https://boringssl.googlesource.com/boringssl/ | |
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251 [5] https://datatracker.ietf.org/doc/html/rfc9002 |
7843 | 252 [6] https://nginx.org/en/docs/http/ngx_http_core_module.html#listen |
253 [7] https://nginx.org/en/docs/debugging_log.html | |
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254 [8] http://vger.kernel.org/lpc_net2018_talks/willemdebruijn-lpc2018-udpgso-paper-DRAFT-1.pdf |