Mercurial > hg > nginx-quic
annotate auto/init @ 7832:ad3a6f069498 quic
Added proper handling of connection close phases.
There are following flags in quic connection:
closing - true, when a connection close is initiated, for whatever reason
draining - true, when a CC frame is received from peer
The following state machine is used for closing:
+------------------+
| I/HS/AD |
+------------------+
| | |
| | V
| | immediate close initiated:
| | reasons: close by top-level protocol, fatal error
| | + sends CC (probably with app-level message)
| | + starts close_timer: 3 * PTO (current probe timeout)
| | |
| | V
| | +---------+ - Reply to input with CC (rate-limited)
| | | CLOSING | - Close/Reset all streams
| | +---------+
| | | |
| V V |
| receives CC |
| | |
idle | |
timer | |
| V |
| +----------+ | - MUST NOT send anything (MAY send a single CC)
| | DRAINING | | - if not already started, starts close_timer: 3 * PTO
| +----------+ | - if not already done, close all streams
| | |
| | |
| close_timer fires
| |
V V
+------------------------+
| CLOSED | - clean up all the resources, drop connection
+------------------------+ state completely
The ngx_quic_close_connection() function gets an "rc" argument, that signals
reason of connection closing:
NGX_OK - initiated by application (i.e. http/3), follow state machine
NGX_DONE - timedout (while idle or draining)
NGX_ERROR - fatal error, destroy connection immediately
The PTO calculations are not yet implemented, hardcoded value of 5s is used.
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Thu, 23 Apr 2020 13:41:08 +0300 |
parents | 05c894a598ea |
children | 549b13cd793b |
rev | line source |
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444
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1 |
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2 # Copyright (C) Igor Sysoev |
4412 | 3 # Copyright (C) Nginx, Inc. |
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455 | 6 NGX_MAKEFILE=$NGX_OBJS/Makefile |
7 NGX_MODULES_C=$NGX_OBJS/ngx_modules.c | |
8 | |
9 NGX_AUTO_HEADERS_H=$NGX_OBJS/ngx_auto_headers.h | |
10 NGX_AUTO_CONFIG_H=$NGX_OBJS/ngx_auto_config.h | |
11 | |
12 NGX_AUTOTEST=$NGX_OBJS/autotest | |
13 NGX_AUTOCONF_ERR=$NGX_OBJS/autoconf.err | |
14 | |
15 # STUBs | |
469 | 16 NGX_ERR=$NGX_OBJS/autoconf.err |
17 MAKEFILE=$NGX_OBJS/Makefile | |
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455 | 20 NGX_PCH= |
21 NGX_USE_PCH= | |
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22 |
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455 | 24 # check the echo's "-n" option and "\c" capability |
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26 if echo "test\c" | grep c >/dev/null; then |
455 | 27 |
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28 if echo -n test | grep n >/dev/null; then |
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29 ngx_n= |
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30 ngx_c= |
455 | 31 |
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32 else |
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33 ngx_n=-n |
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34 ngx_c= |
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35 fi |
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36 |
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37 else |
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38 ngx_n= |
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39 ngx_c='\c' |
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40 fi |
452 | 41 |
42 | |
455 | 43 # create Makefile |
452 | 44 |
455 | 45 cat << END > Makefile |
452 | 46 |
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47 default: build |
452 | 48 |
49 clean: | |
455 | 50 rm -rf Makefile $NGX_OBJS |
452 | 51 END |