http/3: add shutdown support

- openssl-quic shutdown handling
- ngtcp2 shutdown handling
- quiche shutdown handling
- add test_19_06 for verfication

Reported-by: Dexter

http/3: add shutdown support

- openssl-quic shutdown handling
- ngtcp2 shutdown handling
- quiche shutdown handling
- add test_19_06 for verfication

Reported-by: Dexter Gerig
Closes #14027
Fixes #14022

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quic: require at least OpenSSL 3.3 for QUIC

- when checking for QUIC support in OpenSSL, also check
for it being at least 3.3.0
- remove workarounds for features buggy or missing i

quic: require at least OpenSSL 3.3 for QUIC

- when checking for QUIC support in OpenSSL, also check
for it being at least 3.3.0
- remove workarounds for features buggy or missing in 3.2

Closes #14026

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http: remove "struct HTTP"

It is not actually used anymore and only contained a dummy struct field.
Remove all traces and uses of it.

Closes #13927

connection: shutdown TLS (for FTP) better

This adds connection shutdown infrastructure and first use for FTP. FTP
data connections, when not encountering an error, are now shut down in a

connection: shutdown TLS (for FTP) better

This adds connection shutdown infrastructure and first use for FTP. FTP
data connections, when not encountering an error, are now shut down in a
blocking way with a 2sec timeout.

- add cfilter `Curl_cft_shutdown` callback
- keep a shutdown start timestamp and timeout at connectdata
- provide shutdown timeout default and member in
`data->set.shutdowntimeout`.
- provide methods for starting, interrogating and clearing
shutdown timers
- provide `Curl_conn_shutdown_blocking()` to shutdown the
`sockindex` filter chain in a blocking way. Use that in FTP.
- add `Curl_conn_cf_poll()` to wait for socket events during
shutdown of a connection filter chain.
This gets the monitoring sockets and events via the filters
"adjust_pollset()" methods. This gives correct behaviour when
shutting down a TLS connection through a HTTP/2 proxy.
- Implement shutdown for all socket filters
- for HTTP/2 and h2 proxying to send GOAWAY
- for TLS backends to the best of their capabilities
- for tcp socket filter to make a final, nonblocking
receive to avoid unwanted RST states
- add shutdown forwarding to happy eyeballers and
https connect ballers when applicable.

Closes #13904

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lib/v*: tidy up types and casts

Also add a couple of negative checks.

Cherry-picked from #13489
Closes #13622

http/2, http/3: decouple stream state from easy handle

- add `Curl_hash_offt` as hashmap between a `curl_off_t` and
an object. Use this in h2+h3 connection filters to associate
`

http/2, http/3: decouple stream state from easy handle

- add `Curl_hash_offt` as hashmap between a `curl_off_t` and
an object. Use this in h2+h3 connection filters to associate
`data->id` with the internal stream state.
- changed implementations of all affected connection filters
- removed `h2_ctx*` and `h3_ctx*` from `struct HTTP` and thus
the easy handle
- solves the problem of attaching "foreign protocol" easy handles
during connection shutdown

Test 1616 verifies the new hash functions.

Closes #13204

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build: prefer `USE_IPV6` macro internally (was: `ENABLE_IPV6`)

Before this patch, two macros were used to guard IPv6 features in curl
sources: `ENABLE_IPV6` and `USE_IPV6`. This patch ma

build: prefer `USE_IPV6` macro internally (was: `ENABLE_IPV6`)

Before this patch, two macros were used to guard IPv6 features in curl
sources: `ENABLE_IPV6` and `USE_IPV6`. This patch makes the source use
the latter for consistency with other similar switches.

`-DENABLE_IPV6` remains accepted for compatibility as a synonym for
`-DUSE_IPV6`, when passed to the compiler.

`ENABLE_IPV6` also remains the name of the CMake and `Makefile.vc`
options to control this feature.

Closes #13349

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tls: use shared init code for TCP+QUIC

Closes #13172

vquic: use new curl_int64_t type

- add curl_int64_t signed 64-bit type for lib use

- define CURL_PRId64, CURL_PRIu64 format ids

- use curl_int64_t in vquic

curl_in

vquic: use new curl_int64_t type

- add curl_int64_t signed 64-bit type for lib use

- define CURL_PRId64, CURL_PRIu64 format ids

- use curl_int64_t in vquic

curl_int64_t signed complements the existing curl_uint64_t unsigned.

Note that `curl_int64_t` and `int64_t` are assignable from each other
but not identical. Some platforms with 64 long type defint int64_t as
"long long" (staring at macOS) which messes up things like pointers and
format identifiers.

Closes https://github.com/curl/curl/pull/13293

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vquic: use CURL_FORMAT_CURL_OFF_T for 64 bit printf output

Reported-by: Keitagit-kun on github
Fixes #13224
Closes #13231

http2, http3: only return CURLE_PARTIAL_FILE when bytes were received

- should resolve spurious pytest failures when stream were reset
right after response header were received

http2, http3: only return CURLE_PARTIAL_FILE when bytes were received

- should resolve spurious pytest failures when stream were reset
right after response header were received

Clsoes #13151

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lib: keep conn IP information together

new struct ip_quadruple for holding local/remote addr+port

- used in data->info and conn and cf-socket.c
- copy back and forth complete st

lib: keep conn IP information together

new struct ip_quadruple for holding local/remote addr+port

- used in data->info and conn and cf-socket.c
- copy back and forth complete struct
- add 'secondary' to conn
- use secondary in reporting success for ftp 2nd connection

Reported-by: DasKutti on github
Fixes #13084
Closes #13090

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openssl-quic: fix BIO leak and Windows warning

Caused by an accidentally duplicated line in
d6825df334def106f735ce7e0c1a2ea87bddffb0.

```
.../lib/vquic/curl_osslq.c:1095:30:

openssl-quic: fix BIO leak and Windows warning

Caused by an accidentally duplicated line in
d6825df334def106f735ce7e0c1a2ea87bddffb0.

```
.../lib/vquic/curl_osslq.c:1095:30: warning: implicit conversion loses integer precision: 'curl_socket_t' (aka 'unsigned long long') to 'int' [-Wshorten-64-to-32]
1095 | bio = BIO_new_dgram(ctx->q.sockfd, BIO_NOCLOSE);
| ~~~~~~~~~~~~~ ~~~~~~~^~~~~~
1 warning and 2 errors generated.
```

Reviewed-by: Stefan Eissing
Closes #13043

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openssl-quic: fix unity build, casing, indentation

- rename static functions to avoid duplicate symbols in unity mode.
- windows -> Windows/window in error message and comment.
- fix

openssl-quic: fix unity build, casing, indentation

- rename static functions to avoid duplicate symbols in unity mode.
- windows -> Windows/window in error message and comment.
- fix indentation.

Reviewed-by: Stefan Eissing
Closes #13044

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misc: Fix typos in docs and lib

This fixes miscellaneous typos and duplicated words in the docs, lib
and test comments and a few user facing errorstrings.

Author: RainRat on Git

misc: Fix typos in docs and lib

This fixes miscellaneous typos and duplicated words in the docs, lib
and test comments and a few user facing errorstrings.

Author: RainRat on Github
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Dan Fandrich <dan@coneharvesters.com>
Closes: #13019

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OpenSSL QUIC: adapt to v3.3.x

- set our idle timeout as transport parameter
- query negotiated idle timeout for connection alive checks
- query number of available bidi streams on a

OpenSSL QUIC: adapt to v3.3.x

- set our idle timeout as transport parameter
- query negotiated idle timeout for connection alive checks
- query number of available bidi streams on a connection
- use write_ex2 with SSL_WRITE_FLAG_CONCLUDE to signal
EOF on last chunk write, so stream close does not
require an additional QUIC packet

Closes #12933

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openssl-quic: check on Windows that socket conv to int is possible

Fixes #12861
Closes #12865

osslq: remove the TLS library from the version output

Since we only support using a single TLS library at any one time, we
know that the TLS library for QUIC is the same that is also sho

osslq: remove the TLS library from the version output

Since we only support using a single TLS library at any one time, we
know that the TLS library for QUIC is the same that is also shown for
regular TLS.

Fixes #12763
Reported-by: Viktor Szakats
Closes #12767

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http3: initial support for OpenSSL 3.2 QUIC stack

- HTTP/3 for curl using OpenSSL's own QUIC stack together
with nghttp3
- configure with `--with-openssl-quic` to enable curl to

http3: initial support for OpenSSL 3.2 QUIC stack

- HTTP/3 for curl using OpenSSL's own QUIC stack together
with nghttp3
- configure with `--with-openssl-quic` to enable curl to
build this. This requires the nghttp3 library
- implementation with the following restrictions:
* macOS has to use an unconnected UDP socket due to an
issue in OpenSSL's datagram implementation
See https://github.com/openssl/openssl/issues/23251
This makes connections to non-reponsive servers hang.
* GET requests will send the indicator that they have
no body in a separate QUIC packet. This may result
in processing delays or Transfer-Encodings on proxied
requests
* uploads that encounter blocks will use 100% cpu as
detection of these flow control issue is not working
(we have not figured out to pry that from OpenSSL).

Closes #12734

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