| Commit message (Collapse) | Author | Age |
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It has got lost in e1eb7f4ca9f1, let alone a subsequent update in 63c66b7cc07c.
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Because of QPACK compression it's hard to see what fields are actually
sent by the server.
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This change follows similar changes in HTTP/1 and HTTP/2 in 9cf043a5d9ca.
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This became unnecessary after discarding invalid packets since a6784cf32c13.
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Previously it had -1 as fd. This fixes proxying, which relies on downstream
connection having a real fd. Also, this reduces diff to the default branch for
ngx_close_connection().
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If a MAX_DATA frame was received before any stream was created, then the worker
process would crash in nginx_quic_handle_max_data_frame() while traversing the
stream tree. The issue is solved by adding a check that makes sure the tree is
not empty.
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Previously HTTP/3 streams were parsed by one character. Now all parse functions
receive buffers. This should optimize parsing time and CPU load.
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Found by Clang Static Analyzer.
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Found by Clang Static Analyzer.
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This is a follow up to 41f4bd4c51f1.
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The Huffman encoder/decoder now can be built separately from HTTP/2 module.
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Previously, when cleaning up a QUIC stream in shutdown mode,
ngx_quic_shutdown_quic() was called, which could close the QUIC connection
right away. This could be a problem if the connection was referenced up the
stack. For example, this could happen in ngx_quic_init_streams(),
ngx_quic_close_streams(), ngx_quic_create_client_stream() etc.
With a typical HTTP/3 client the issue is unlikely because of HTTP/3 uni
streams which need a posted event to close. In this case QUIC connection
cannot be closed right away.
Now QUIC connection read event is posted and it will shut down the connection
asynchronously.
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After receiving GOAWAY, client is not supposed to create new streams. However,
until client reads this frame, we allow it to create new streams, which are
gracefully rejected. To prevent client from abusing this algorithm, a new
limit is introduced. Upon reaching keepalive_requests * 2, server now closes
the entire QUIC connection claiming excessive load.
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The "hq" mode is HTTP/0.9-1.1 over QUIC. The following limits are introduced:
- uni streams are not allowed
- keepalive_requests is enforced
- keepalive_time is enforced
In case of error, QUIC connection is finalized with 0x101 code. This code
corresponds to HTTP/3 General Protocol Error.
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The directive limits the number of uni streams client is allowed to create.
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Previously, in-flight byte counter and congestion window were properly
maintained, but the limit was not properly implemented.
Now a new datagram is sent only if in-flight byte counter is less than window.
The limit is datagram-based, which means that a single datagram may lead to
exceeding the limit, but the next one will not be sent.
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Previously, the error was ignored leading to unnecessary retransmits.
Now, unsent frames are returned into output queue, state is reset, and
timer is started for the next send attempt.
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As per quic-http-34:
Endpoints SHOULD create the HTTP control stream as well as the
unidirectional streams required by mandatory extensions (such as the
QPACK encoder and decoder streams) first, and then create additional
streams as allowed by their peer.
Previously, client could create and destroy additional uni streams unlimited
number of times before creating mandatory streams.
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The information about the type is contained in off/len/fin bits.
Also, where possible, only the first stream type (0x08) is used for simplicity.
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In several parts of ngx_http_v3_header_filter() connection pool was used for
request-related data.
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OpenSSL is known to provide read keys for an encryption level before the
level is active in TLS, following the old BoringSSL API. In BoringSSL,
it was then fixed to defer releasing read keys until QUIC may use them.
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The directive enables usage of UDP segmentation offloading by quic.
By default, gso is disabled since it is not always operational when
detected (depends on interface configuration).
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This was broken by 2dfd313f22f2.
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To improve output performance, UDP segmentation offloading is used
if available. If there is a significant amount of data in an output
queue and path is verified, QUIC packets are not sent one-by-one,
but instead are collected in a buffer, which is then passed to kernel
in a single sendmsg call, using UDP GSO. Such method greatly decreases
number of system calls and thus system load.
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Additionally, the ngx_init_srcaddr_cmsg() function is introduced which
initializes control message with connection local address.
The NGX_HAVE_ADDRINFO_CMSG macro is defined when at least one of methods
to deal with corresponding control message is available.
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Sometimes, QUIC packets need to be of certain (or minimal) size. This is
achieved by adding PADDING frames. It is possible, that adding padding will
affect header size, thus forcing us to recalculate padding size once more.
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Renamed header -> field per quic-qpack naming convention, in particular:
- Header Field -> Field Line
- Header Block -> (Encoded) Field Section
- Without Name Reference -> With Literal Name
- Header Acknowledgement -> Section Acknowledgment
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As per RFC 9000:
Values of 2^14 or greater are invalid.
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The stream session requires 'ssl' flag to be set in order to perform
certificate verification.
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Reference values can be found in RFC 3602, 2.1, 2.4.
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AES-128 key length is known in compile time.
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