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As was changed in 253cf267f95a.
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The Huffman encoder/decoder now can be built separately from HTTP/2 module.
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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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Previously it was in ngx_http_v3_streams.c, but it's unrelated to streams.
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The patch adds proper transitions between multiple networking addresses that
can be used by a single quic connection. New networking paths are validated
using PATH_CHALLENGE/PATH_RESPONSE frames.
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In FreeBSD 13, eventfd(2) was added, and this breaks build
with --test-build-epoll and without --with-file-aio. Fix is
to move eventfd(2) detection to auto/os/linux, as it is used
only on Linux as a notification mechanism for epoll().
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The connection migration-related code from quic.c with dependencies is moved
into separate file.
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When configured with the "set_real_ip_from", it can set client's IP
address as visible in logs to the one obtained via the PROXY protocol.
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The strerrordesc_np() function, introduced in glibc 2.32, provides an
async-signal-safe way to obtain error messages. This makes it possible
to avoid copying error messages.
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Previously, systems without sys_nerr (or _sys_nerr) were handled with an
assumption that errors start at 0 and continuous. This is, however, not
something POSIX requires, and not true on some platforms.
Notably, on Linux, where sys_nerr is no longer available for newly linked
binaries starting with glibc 2.32, there are gaps in error list, which
used to stop us from properly detecting maximum errno. Further, on
GNU/Hurd errors start at 0x40000001.
With this change, maximum errno detection is moved to the runtime code,
now able to ignore gaps, and also detects the first error if needed.
This fixes observed "Unknown error" messages as seen on Linux with
glibc 2.32 and on GNU/Hurd.
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Reported by Thibault Nélis.
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The quic kernel bpf helper inspects packet payload for DCID, extracts key
and routes the packet into socket matching the key.
Due to reuseport feature, each worker owns a personal socket, which is
identified by the same key, used to create DCID.
BPF objects are locked in RAM and are subject to RLIMIT_MEMLOCK.
The "ulimit -l" command may be used to setup proper limits, if maps
cannot be created with EPERM or updated with ETOOLONG.
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It contains wrappers for operations with BPF maps and for loading BPF programs.
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The filter is responsible for creating HTTP/3 response header and body.
The change removes differences to the default branch for
ngx_http_chunked_filter_module and ngx_http_header_filter_module.
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When installing or running from a non-root user it is sometimes required to
override default, compiled in error log path. There was no way to do this
without rebuilding the binary (ticket #147).
This patch introduced "-e" command line option which allows one to override
compiled in error log path.
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Addon modules, both dynamic and static, can now use shared source files.
Shared sources result in only one make rule even if specified several
times in different modules.
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Adds 'set' directive to the stream server context.
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The file contains only encoding functions.
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Also, introduced ngx_stream_quic_module.
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The parameter allows processing HTTP/0.9-2 over QUIC.
Also, introduced ngx_http_quic_module and moved QUIC settings there
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Recently BoringSSL introduced SSL_set_quic_early_data_context()
that serves as an additional constrain to enable 0-RTT in QUIC.
Relevant changes:
* https://boringssl.googlesource.com/boringssl/+/7c52299%5E!/
* https://boringssl.googlesource.com/boringssl/+/8519432%5E!/
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See 7246:04ebf29eaf5b for details.
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All code dealing with serializing/deserializing
is moved int srv/event/ngx_event_quic_transport.c/h file.
All macros for dealing with data are internal to source file.
The header file exposes frame types and error codes.
The exported functions are currently packet header parsers and writers
and frames parser/writer.
The ngx_quic_header_t structure is updated with 'log' member. This avoids
passing extra argument to parsing functions that need to report errors.
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New files:
src/event/ngx_event_quic_protection.h
src/event/ngx_event_quic_protection.c
The protection.h header provides interface to the crypto part of the QUIC:
2 functions to initialize corresponding secrets:
ngx_quic_set_initial_secret()
ngx_quic_set_encryption_secret()
and 2 functions to deal with packet processing:
ngx_quic_encrypt()
ngx_quic_decrypt()
Also, structures representing secrets are defined there.
All functions require SSL connection and a pool, only crypto operations
inside, no access to nginx connections or events.
Currently pool->log is used for the logging (instead of original c->log).
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