Aritra Basu e78b1b3ecc HTTP/3: add proxy CONNECT and MASQUE CONNECT-UDP support (ngtcp2 QUIC) ... This patch adds two major proxy capabilities to curl (ngtcp2 QUIC): - HTTP/3 Proxy CONNECT: Tunnel HTTP/1.1 or HTTP/2 traffic through an HTTPS proxy that speaks HTTP/3 (QUIC) using the standard CONNECT method over an HTTP/3 connection. - MASQUE CONNECT-UDP: Tunnel HTTP/3 (QUIC) traffic through an HTTP proxy (speaking HTTP/1.1, HTTP/2, or HTTP/3) using the extended CONNECT method with the CONNECT-UDP protocol (RFC9297 & RFC9298). Public API additions: - `CURLPROXY_HTTPS3`: new proxy type constant for HTTP/3 proxy - `--proxy-http3`: new CLI flag to negotiate HTTP/3 with HTTPS proxy The implementation adds two new filters: - `H3-PROXY` - enables negotiating HTTP/3 (QUIC) to the proxy and running CONNECT/CONNECT-UDP through that proxy transport. - `CAPSULE` - dedicated filter inserted between QUIC transport and HTTP-PROXY to handle datagram capsule encapsulation/decapsulation. Here is how the curl filter chaining looks in different scenarios: - HTTP/3 Proxy CONNECT (tunneling TCP protocols over QUIC proxy): conn -> HTTP/1.1 or HTTP/2 -> SSL -> HTTP-PROXY -> H3-PROXY -> HAPPY-EYEBALLS -> UDP - MASQUE CONNECT-UDP (tunneling QUIC over any proxy): conn -> HTTP/3 -> CAPSULE -> HTTP-PROXY -> H3-PROXY -> HAPPY-EYEBALLS -> UDP conn -> HTTP/3 -> CAPSULE -> HTTP-PROXY -> H1-PROXY or H2-PROXY -> SSL -> HAPPY-EYEBALLS -> TCP - Both features currently require the ngtcp2 QUIC backend. - Both features are experimental (disabled by default). Enable with `--enable-proxy-http3`(autotools) or `-DUSE_PROXY_HTTP3=ON`(CMake). Tests: - tests/unit/unit3400.c: Unit tests for capsule protocol encode/decode - tests/http/test_60_h3_proxy.py: Comprehensive pytest integration suite - tests/http/testenv/h2o.py: Managing h2o instances with HTTP/1.1, HTTP/2, and HTTP/3 (QUIC) listeners, proxy.connect and proxy.connect-udp enabled. References: RFC 9297 - HTTP Datagrams and the Capsule Protocol RFC 9298 - Proxying UDP in HTTP RFC 9000 §16 — Variable-Length Integer Encoding Signed-off-by: Aritra Basu <aritrbas+gh@cisco.com> Closes #21153		2026-05-27 08:49:53 +02:00
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cleancmd.pl	cleancmd.pl: remove markdown links before spellcheck	2026-03-26 07:57:19 +01:00
cmp-config.pl	tidy-up: miscellaneous	2026-05-16 01:56:17 +02:00
cmp-pkg-config.sh
codespell-ignore.words
codespell.sh
distfiles.sh	buildconf: remove	2026-04-04 11:35:24 +02:00
pyspelling.words	HTTP/3: add proxy CONNECT and MASQUE CONNECT-UDP support (ngtcp2 QUIC)	2026-05-27 08:49:53 +02:00
pyspelling.yaml
randcurl.pl
requirements-docs.txt
requirements-proselint.txt
requirements.txt	GHA: bump actions and pips	2026-05-01 21:19:22 +02:00
shellcheck-ci.sh
shellcheck.sh
spellcheck.curl
trimmarkdownheader.pl
typos.sh
typos.toml	GHA/non-native: move BSDs to a single matrix, add DragonFly and Midnight	2026-05-20 03:19:02 +02:00
verify-examples.pl	spacecheck: check long lines and repeat spaces, fix fallouts	2026-03-25 11:02:08 +01:00
verify-synopsis.pl	spacecheck: check long lines and repeat spaces, fix fallouts	2026-03-25 11:02:08 +01:00
yamlcheck.sh
yamlcheck.yaml