Mercurial > hg > nginx-quic
annotate auto/headers @ 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 | d620f497c50f |
children |
rev | line source |
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444
42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents:
253
diff
changeset
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1 |
42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents:
253
diff
changeset
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2 # Copyright (C) Igor Sysoev |
4412 | 3 # Copyright (C) Nginx, Inc. |
444
42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents:
253
diff
changeset
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4 |
253
b6793bc5034b
nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
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5 |
2615 | 6 ngx_include="unistd.h"; . auto/include |
7 ngx_include="inttypes.h"; . auto/include | |
8 ngx_include="limits.h"; . auto/include | |
9 ngx_include="sys/filio.h"; . auto/include | |
2624
418c9f97bd01
fix FreeBSD before 7 building, broken in r2616
Igor Sysoev <igor@sysoev.ru>
parents:
2615
diff
changeset
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10 ngx_include="sys/param.h"; . auto/include |
2615 | 11 ngx_include="sys/mount.h"; . auto/include |
12 ngx_include="sys/statvfs.h"; . auto/include | |
13 ngx_include="crypt.h"; . auto/include |