Commit graph

6903 commits

Author SHA1 Message Date
Stefan Eissing
b0f6593219
openssl-quic: check results better
Fail on errors from SSL_handle_events().
Force quit Caddy test instance that is left hanging longer with
openssl-quic tests for unknown reasons.

Reported in Joshua's sarif data

Closes #18720
2025-09-25 14:07:56 +02:00
Stefan Eissing
ccd2b03b0d
socks: rewwork, cleaning up socks state handling
Restructured the code in the following ways:

* add terminal states SUCCESS and FAILED
* split SOCK4 and SOCK5 states to be more clear
* use `bufq` for send/recv of SOCK messages
* reduce SOCKS4 states, more speaking names
* for most states, move code into static function
* reduce SOCKS5 states, more speaking names
* add helpers for traversing to FAILED state
* add helper to flush bufq
* add hepler to read minimum amount into bufq

Closes #18401
2025-09-25 14:03:10 +02:00
Viktor Szakats
7d5f8be532
GHA: use pip requirements.txt with pins, and more venv
- requirements.txt: shorten copyright headers.

- requirements.txt: pin packages to versions.

- GHA/windows: use `tests/requirements.txt`.
  Pick a `cryptography` package version that satifies both `impacket`
  and pytests dependencies.

- GHA/checksrc: move pip deps into a new `requirements.txt`.
  To make Dependabot detect and bump them.

- GHA/checksrc: replace apt packages for python test deps with pip
  install `tests/**/requirements.txt` to a venv.

- GHA/checksrc: use venv and drop `--break-system-packages`.

- GHA/linux: fix to actually activate venvs.
  Follow-up to 2638570241 #15578

- GHA/linux: fixup (did not cause an issue)
  Follow-up to d75785c7de #18660

- GHA: create venvs later, simplify commands.

- GHA: sync pip command-line options, e.g. drop progress-bar,
  everywhere.

Assisted-by: Dan Fandrich

Closes #18708
2025-09-25 10:45:30 +02:00
Daniel Stenberg
b011e3fcfb
vssh: drop support for wolfSSH
The implementation was incomplete and lesser than the other backends. No
one ever reported a bug or requested enhancements for this, indicating
that this backend was never used.

Closes #18700
2025-09-24 22:59:33 +02:00
Viktor Szakats
e5d9c871f0
tidy-up: assortment of small fixes
- examples/headerapi: fix wrong cast.
- curl_ngtcp2: delete stray character from error message.
- rustls: fix inline variable declaration.
- sendf: drop redundant `int` cast.
- libtest/cli_ws_data: drop cast with mismatched signedness.

Cherry-picked from #18343

Closes #18664
2025-09-21 16:50:14 +02:00
Daniel Stenberg
3dad0cfd77
write-out: make %header{} able to output *all* occurances of a header
By appending `:all:[separator]` to the header name. The `[separator]` string
is output between each header value if there are more than one to output.

Test 764 and 765 verify

Idea-by: kapsiR on github
Ref: #18449
Closes #18491
2025-09-21 00:00:29 +02:00
Daniel Stenberg
5ab120bc4e
krb5: drop support for Kerberos FTP
It was accidentally broken in commit 0f4c439fc7, shipped since
8.8.0 (May 2024) and yet not a single person has noticed or reported,
indicating that we might as well drop support for FTP Kerberos.

Krb5 support was added in 54967d2a3a (July 2007), and we have
been carrying the extra license information around since then for this
code. This commit removes the last traces of that code and thus we can
remove the extra copyright notices along with it.

Reported-by: Joshua Rogers
Closes #18577
2025-09-20 23:58:28 +02:00
Viktor Szakats
bf7375ecc5
build: avoid overriding system symbols for socket functions
Before this patch `accept4()`, `socket()`, `socketpair()`, `send()` and
`recv()` system symbols were remapped via macros, using the same name,
to local curl debug wrappers. This patch replaces these overrides by
introducing curl-namespaced macros that map either to the system symbols
or to their curl debug wrappers in `CURLDEBUG` (TrackMemory) builds.

This follows a patch that implemented the same for `accept()`.

The old method required tricks to make these redefines work in unity
builds, and avoid them interfering with system headers. These tricks
did not work for system symbols implemented as macros.

The new method allows to setup these mappings once, without interfering
with system headers, upstream macros, or unity builds. It makes builds
more robust.

Also:
- checksrc: ban all mapped functions.
- docs/examples: tidy up checksrc rules.

Follow-up to 9863599d69 #18502
Follow-up to 3bb5e58c10 #17827

Closes #18503
2025-09-20 13:44:59 +02:00
Viktor Szakats
1429858bce
tidy-up: update MS links, allow long URLs via checksrc
- update Microsoft documentation links.
  (also drop language designator where present.)

- checksrc: allow longer than 78 character lines if they
  contain a https URL. To make these links easier to use and parse.

- merge links that were split into two lines.

Closes #18626
2025-09-20 11:49:23 +02:00
Viktor Szakats
92f215fea1
build: address some -Weverything warnings, update picky warnings
`-Weverything` is not enabled by curl, and not recommended by LLVM,
because it may enable experimental options, and will result in new
fallouts after toolchain upgrades. This patch aims to fix/silence as much
as possible as found with llvm/clang 21.1.0. It also permanently enables
warnings that were fixed in source and deemed manageable in the future.
`-Wformat` warnings are addressed separately via #18343.

Fix/silence warnings in the source:
- typecheck-gcc.h: fix `-Wreserved-identifier`.
- lib: silence `-Wcast-function-type-strict`.
  For llvm 16+ or Apple clang 16+.
- asyn-ares: limit `HAPPY_EYEBALLS_DNS_TIMEOUT` to old c-ares versions.
- curl_trc: fix `-Wc++-hidden-decl`.
- doh: fix `-Wc++-keyword`.
- ftp: fix `-Wreserved-identifier`.
- ldap: fix `-Wreserved-identifier`.
- mqtt: comment unused macro to avoid warning.
- multi_ev: drop unused macros to avoid warnings.
- setopt: fix useless `break;` after `return;`.
- gtls, mbedtls, rustls: silence `-Wconditional-uninitialized`.
- socks_sspi, schannel, x509asn1: fix `-Wimplicit-int-enum-cast`.
- x509asn1: fix `-Wc++-keyword`.
- openssl: scope `OSSL_UI_METHOD_CAST` to avoid unused macro warning.
- libssh2, wolfssl: drop unused macros.
- curl_ngtcp2, curl_quiche, httpsrr, urlapi: drop/limit unused macros.
- tool_getparam: fix useless `break;` after `return;` or `break;`.
  Not normally enabled because it doesn't work with unity.
  https://github.com/llvm/llvm-project/issues/71046
- tool_operate: fix `-Wc++-keyword`.
- curlinfo: fix a `-Wunsafe-buffer-usage`.
- tests: silence `-Wformat-non-iso`.
- lib557: fix `-Wreserved-identifier`.
- lib1565: silence `-Wconditional-uninitialized`.

Enable the above clang warnings permanently in picky mode:
- `-Wc++-hidden-decl`
- `-Wc++-keyword` (except for Windows, where it collides with `wchar_t`)
- `-Wcast-function-type-strict`
- `-Wcast-function-type`
- `-Wconditional-uninitialized`
- `-Wformat-non-iso` (except for clang-cl)
- `-Wreserved-identifier`
- `-Wtentative-definition-compat`

Silence problematic `-Weverything` warnings globally (in picky mode):
- `-Wused-but-marked-unused` (88000+ hits) and
  `-Wdisabled-macro-expansion` (2600+ hits).
  Triggered by `typecheck-gcc.h` when building with clang 14+.
  Maybe there exists a way to fix within that header?
  Ref: https://discourse.llvm.org/t/removing-wused-but-marked-unused/55310
- `-Wunsafe-buffer-usage`. clang 16+. 7000+ hits.
  May be useful in theory, but such high volume of hits makes it
  impractical to review and possibly address. Meant for C++.
  Ref: https://clang.llvm.org/docs/SafeBuffers.html
  Ref: https://stackoverflow.com/questions/77017567/how-to-fix-code-to-avoid-warning-wunsafe-buffer-usage
  Ref: https://discourse.llvm.org/t/rfc-c-buffer-hardening/65734
  Ref: https://github.com/llvm/llvm-project/pull/111624
- `-Wimplicit-void-ptr-cast`. clang 21+. 1700+ hits.
  C++ warning, deemed pure noise.
  Ref: https://github.com/curl/curl/issues/18470#issuecomment-3253506266
- `-Wswitch-default` (180+ hits), `-Wswitch-enum` (190+ hits),
  `-Wcovered-switch-default` (20+ hits).
  Next to impossible to fix cleanly, esp. when the covered `case`
  branches depend on compile-time options.
- `-Wdocumentation-unknown-command` (8+ hits).
  Triggered in a few sources. Seems arbitrary and bogus.
- `-Wpadded` (550+ hits).
- `-Wc++-keyword` on Windows, where it collides with `wchar_t`.
  (100+ hits)
  Ref: https://github.com/llvm/llvm-project/issues/155988
- `-Wreserved-macro-identifier`. clang 13+. 5+ hits.
  Sometimes it's necessary to set external macros that use
  the reserved namespace. E.g. `_CRT_NONSTDC_NO_DEPRECATE`,
  `__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__`, `__NO_NET_API`,
  possibly `_REENTRANT`, and more.
  It's not worth trying to silence them individually.
- `-Wnonportable-system-include-path` with `clang-cl`.
  It'd be broken by doing what the warning suggests.
- `-Wformat-non-iso` for clang-cl.

CMake `PICKY_COMPILER=ON` (the default) or `./configure`
`--enable-warnings` (not the default) is required to enable these
silencing rules.

Also:
- autotools, cmake: fix Apple clang and mainline llvm version translations.
  Ref: https://en.wikipedia.org/wiki/Xcode#Toolchain_versions
- autotools, cmake: enable `-Warray-compare` for clang 20+.
  Follow-up to 4b7accda5a #17196
- cmake: fix to enable `-Wmissing-variable-declarations` at an earlier
  clang version.
- cmake: update internal logic to handle warning options with `+` in
  them.
- cmake: fix internal logic to match the whole option when looking
  into `CMAKE_C_FLAGS` for custom-disabled warnings.

Follow-up to b85cb8cb4e #18485

Closes #18477
2025-09-20 10:16:15 +02:00
Viktor Szakats
1c49f2f26d
windows: replace _beginthreadex() with CreateThread()
Replace `_beginthreadex()` C runtime calls with native win32 API
`CreateThread()`. The latter was already used in `src/tool_doswin.c`
and in UWP and Windows CE builds before this patch. After this patch
all Windows flavors use it. To drop PP logic and simplify code.

While working on this it turned out that `src/tool_doswin.c` calls
`TerminateThread()`, which isn't recommended by the documentation,
except for "the most extreme cases". This patch makes no attempt
to change that code.
Ref: 9a2663322c #17572
Ref: https://learn.microsoft.com/windows/win32/api/processthreadsapi/nf-processthreadsapi-terminatethread

Also:
- use `WaitForSingleObjectEx()` on all desktop Windows.
  Ref: 4be80d5109
  Ref: https://sourceforge.net/p/curl/feature-requests/82/
  Ref: https://learn.microsoft.com/windows/win32/api/synchapi/nf-synchapi-waitforsingleobjectex
- tests: drop redundant casts.
- lib3207: fix to not rely on thread macros when building without thread
  support.

Assisted-by: Jay Satiro
Assisted-by: Marcel Raad
Assisted-by: Michał Petryka
Follow-up to 38029101e2 #11625

Closes #18451
2025-09-20 01:28:35 +02:00
Daniel Stenberg
5e2d4d7905
base64: accept zero length argument to base64_encode
We used to treat 0 as "call strlen() to get the length" for
curlx_base64_encode, but it turns out this is rather fragile as we
easily do the mistake of passing in zero when the data is actually not
there and then calling strlen() is wrong.

Force the caller to pass in the correct size. A zero length input string
now returns a zero length output and a NULL pointer.

Closes #18617
2025-09-19 22:57:20 +02:00
Daniel Stenberg
fd6eb8d6e7
cookie: avoid saving a cookie file if no transfer was done
Because parts of the cookie loading happens on transfer start the
in-memory cookie jar risks being incomplete and then a save might
wrongly truncate the target file.

Added test 1902 to verify.

Reported-by: divinity76 on github
Fixes #18621
Closes #18622
2025-09-19 16:40:20 +02:00
Daniel Stenberg
a827e4294c
smtp: check EHLO responses case insensitively
Adjust test 980 to announce starttls in lowercase.

Fixes #18588
Reported-by: Joshua Rogers
Closes #18589
2025-09-18 08:02:12 +02:00
Daniel Stenberg
dbe4e28d57
managen: render better manpage references/links
- When an option name is used in text, this script no longer outputs the
  short plus long version in the manpage output. It makes the text much
  more readable.

  This always showing both verions was previously done primarily to make
  sure roffit would linkify it correctly, but since roffit 0.17 it
  should link both long or short names correctly.

- When managen outputs generic text about options at the end of the
  description it now highlights them properly so that they too get
  linkified correctly in the HTML version. For consistency.

Closes #18580
2025-09-17 15:49:15 +02:00
Viktor Szakats
ea752b575c
sws: fix checking sscanf() return value
Closes #18565
2025-09-16 13:34:51 +02:00
Viktor Szakats
a4196e2249
tidy-up: whitespace
Closes #18553
2025-09-15 15:00:11 +02:00
Stefan Eissing
de3fc1d7ad
asyn-thrdd: drop pthread_cancel
Remove use of pthread_cancel in asnyc threaded resolving. While there
are system where this works, others might leak to resource leakage
(memory, files, etc.). The popular nsswitch is one example where resolve
code can be dragged in that is not prepared.

The overall promise and mechanism of pthread_cancel() is just too
brittle and the historcal design of getaddrinfo() continues to haunt us.

Fixes #18532
Reported-by: Javier Blazquez
Closes #18540
2025-09-15 09:25:43 +02:00
Stefan Eissing
115fe808f2
ngtcp2: check error code on connect failure
Access the error codes of ngtcp2 when a connect attempt failes. Trace
the information for analysis. Treat errors as permanent failure by
default, trigger retrying only when the server refused without
indicating an error.

Closes #18521
2025-09-11 16:00:58 +02:00
Viktor Szakats
61759a9843
pytest: bind to localhost
Pointed out by CodeQL

Fixes https://github.com/curl/curl/security/code-scanning/298

Closes #18506
2025-09-10 00:55:07 +02:00
Viktor Szakats
ec9cb618a0
spacecheck: warn for 3+ empty lines in a row, fix fallouts
Closes #18478
2025-09-04 20:37:51 +02:00
Viktor Szakats
49145249be
tidy-up: drop stray "unused" comments
Closes #18453
2025-09-03 16:31:16 +02:00
Stefan Eissing
24badd29f5
multi: limit-rate revisited
Tweaks around handling of --limit-rate:

* tracing: trace outstanding timeouts by name
* multi: do not mark transfer as dirty that have
  an EXPIRE_TOOFAST set
* multi: have one static function to asses speed limits
* multi: when setting EXPIRE_TOOFAST remove the transfers
  from the dirty set
* progress: rename vars and comment on how speed limit
  timeouts are calculated, for clarity
* transfer: when speed limiting, exit the receive loop
  after a quarter of the limit has been received, not
  on the first chunk received.
* cf-ip-happy.c: clear EXPIRE_HAPPY_EYEBALLS on connect
* scorecard: add --limit-rate parameter to test with
  speed limits in effect

Closes #18454
2025-09-03 15:53:41 +02:00
Daniel Stenberg
de86c2483f
test763: verify IDN hostname with zero width characters only
Bonus: fix memory leak in exit path from 967a626af4

Closes #18465
2025-09-03 15:49:54 +02:00
Daniel Stenberg
71c9706959
tests: remove the 'none' server
Only actually needed servers should be listed and none is then implied
if no servers are listed.

Outputs a warning if "none" is still set as a server.

Closes #18466
2025-09-03 14:30:10 +02:00
Stefan Eissing
9f1102cf74
pytest: add tests for getting a non-existing ftp file
Check that return code is 78.

Closes #18463
2025-09-03 12:51:00 +02:00
Daniel Stenberg
765b5ab0cd
tool_getparam: warn on more unicode prefixes
If a string argument is expected and the first two bytes are 0xe2 ex80
and the third has the 7th bit set, that's enough for curl to warn.

Previously we tried to detect and warn only for the unicode double
quote, but users might use single quotes, other quotes or even lead the
argument with one of the "zero widths" characters. This is an attempt to
detect many of those. Without triggering for "normal" IDN hostnames.

Closes #18459
2025-09-03 11:35:10 +02:00
Stefan Eissing
4d040c71d7
Curl_http(), decomplexify
Split out adding of individual request headers into a switch. Check
the connection http version only on fresh connections, use separate
methods.

Add TE: header directly without allocation. Add bit for indicating
Connection: header has been added and custom headers should not do
that again.

Closes #18444
2025-09-02 07:54:46 +02:00
Stefan Eissing
e65dc7fa23
aws-lc: do not use large buffer
test_10_08, uploading larger files for a h2 proxy, sporadically fails
with a decrpytion error on received data in AWS-LC. The frequency can
be increased by simulated network receive blocks.

Not setting a 4 * TLS record sized buffer, leaving AWS-LC at its
default buffer size seems to mitigate this problem.

Closes #18434
2025-09-01 23:27:11 +02:00
Daniel Stenberg
54f1ef05d6
tool_filetime: accept setting negative filetime
This allows --remote-time to set dates before 1970.

Due to a minor omission in the API, it will still avoid setting the time
if it is indeed exactly epoch 0 (jan 1 1970).

Verified by test 762

Fixes #18424
Reported-by: Terence Eden
Closes #18443
2025-09-01 08:51:36 +02:00
Daniel Stenberg
a5798a51f0
test500: accept 81 allocations
In some configs they happen

Closes #18441
2025-08-31 23:25:37 +02:00
Daniel Stenberg
4a3ed6fc16
urlglob: only accept 255 globs
- using {} with single entries makes little sense
- when using {} sets with two entry lists, there can only be 64 to reach
  maximum number of URLs

Verify the max check in test 761
2025-08-30 22:27:28 +02:00
Stefan Eissing
fa3baabbd8
websocket: improve handling of 0-len frames
Write out 9-length frames to client's WRITEFUNCTION
Read 0-length frames from READFUNCTION *if* the function
started a new frame via `curl_ws_start_frame()`.

Fixes #18286
Closes #18332
Reported-by: Andriy Druk
2025-08-28 11:00:02 +02:00
Daniel Stenberg
d77a23c263
tests: remove the QUIT filters
Once added in cd4aee156f to work around connection shutdown
issues.

Closes #18405
2025-08-27 08:03:59 +02:00
Daniel Stenberg
98c78b2f14
runtests: remove warning message
Every time we first run runtests with -j and then again *without* -j,
this message was shown:

  "Warning: $runnerid: cleardir(log) failed"

Not anymore.

Closes #18404
2025-08-26 23:33:13 +02:00
Daniel Stenberg
ebff00f1af
tool_getparam: let --trace-config override -v
If --trace-config is used to set a level before -v is used, don't reset
the state on first -v (to "-all") as it otherwise does. This way,
--trace-config can be used to set specific trace items before -v on the
command line and it still works.

Previously, the first -v use would otherwise reset and undo the earlier
--trace-config items.

Fixes #18346
Closes #18361
2025-08-26 14:59:59 +02:00
Viktor Szakats
d65436d9a0
openssl: BoringSSL / AWS-LC tidy-ups
- schannel: apply BoringSSL workaround to AWS-LC too.
  Affects Schannel + AWS-LC MultiSSL builds. (not tested in CI)
  Ref: 274940d743 #2643 #2634

- curl_ntlm_core: deduplicate macro defines.

- curl_ntlm_core: document version thresholds for an AWS-LC-specific
  workaround.
  It was necessary between v1.2.0 2022-09-01 and v1.30.1 2024-06-21.
  No longer necessary since v1.31.0 2024-07-01:
  ba94617d99
  Follow-up to 34ef4fab22 #10320

- lib758: drop redundant OpenSSL version guards.
  `OPENSSL_VERSION_NUMBER > 3` automatically guards against LibreSSL,
  BoringSSL and AWS-LC.
  Ref: https://github.com/curl/curl/pull/18288/commits/6ddd8f2c0bbfcb0847b1ee7f257fb772fa47310c
  Follow-up to a5f0ab7995 #18288

- dllmain, curl_sha512_256: formatting.

Closes #18387
2025-08-24 00:30:06 +02:00
Viktor Szakats
cff4c16b83
pytest: fix test_17_09_ssl_min_max for BoringSSL
Ref: https://github.com/curl/curl/actions/runs/17179514833/job/48740057095

Also fix indent.

Cherry-picked from #18384
Closes #18385
2025-08-23 23:04:02 +02:00
Daniel Stenberg
29e4a124a3
tool_operate: bail out better on no URL
To avoid NULL derferences with many outputs and --next.

Follow-up to 034612cd51

Add test 760 to verify

Reported-by: BobodevMm on github
Fixes #18375
Closes #18376
2025-08-23 13:43:46 +02:00
Viktor Szakats
4f0e530c77
tidy-up: formatting
Closes #18373
2025-08-23 01:12:27 +02:00
Daniel Stenberg
844c385812
typecheck-gcc: add type checks for curl_multi_setopt()
Test 745 verifies that all options are tested.

Closes #18357
2025-08-22 17:12:58 +02:00
Daniel Stenberg
b3570b36d7
runtests: show still running tests when nothing has happened for a while
... even if there are tests still pending. To help visualize tests that
might be hanging.

Attempts to set the limit at 10 seconds of silence.

Closes #18349
2025-08-22 16:28:03 +02:00
Daniel Stenberg
33572b851e
tool_urlglob: handle a zero length glob piece
Follow-up to 034612cd51

Add test 759 to verify

Reported-by: Stanislav Osipov
Fixes #18352
Closes #18353
2025-08-22 16:22:07 +02:00
Viktor Szakats
3298a43133
spelling: file system
Closes #18348
2025-08-22 15:53:41 +02:00
Viktor Szakats
f6c2907172
test1557: pass long type to multi_setopt()
A wrong type here has seen to manifest in CI failures with gcc-12 macOS.

Ref: https://github.com/curl/curl/pull/18348#issuecomment-3213881790
Ref: https://github.com/curl/curl/actions/runs/17153761944/job/48665734013?pr=18349

Follow-up to b63cce7fee #18339
Follow-up to 88fc6c491f #18263

Closes #18355
2025-08-22 14:16:45 +02:00
Viktor Szakats
7956a2a756
gnutls: fix building with older supported GnuTLS versions
Also:
- GHA/linux-old: switch jobs from OpenSSL 1.0.2 to GnuTLS 3.5.8.

Ref: https://gitlab.com/gnutls/gnutls/blob/master/NEWS
Follow-up to fa0ccd9f1f #15774
Follow-up to 68bd759c2b #15667
Cherry-picked from #18330
Closes #18335
2025-08-21 18:04:25 +02:00
Viktor Szakats
696150b752
runtests: replace --ci with --buidinfo, show OS/Perl version again
I figure OS/Perl version may be useful to see in local runs,
and also in CI runs where `--ci` was not set:
https://curl.se/dev/log.cgi?id=20250820041228-707387#prob1

Also, only show a message if the `diff` tool is missing.

Follow-up to 985f39c0ce #18147
Closes #18329
2025-08-21 13:11:32 +02:00
Viktor Szakats
8f9d73bcaf
tests: drop unused BLANK envs, unset CURL_NOT_SET
Closes #18328
2025-08-21 13:11:32 +02:00
Viktor Szakats
8fac255fc1
test: add cygwin feature and use it (test 1056, 1517)
To replace custom checks with the same effect.

Closes #18327
2025-08-21 13:11:32 +02:00
Stefan Eissing
88fc6c491f
threaded-resolver: fix shutdown
Changed strategy to start up and terminate resolver thread.

When starting up:

Start the thread with mutex acquired, wait for signal from thread that
it started and has incremented the ref counter. Thread set
pthread_cancel() to disabled before that and only enables cancelling
during resolving itself. This assure that the ref counter is correct and
the unlinking of the resolve context always happens.

When shutting down resolving:

If ref counting shows thread has finished, join it, free everything. If
thread has not finished, try pthread_cancel() (non Windows), but keep
the thread handle around.

When destroying resolving:

Shutdown first, then, if the thread is still there and 'quick_exit' is
not set, join it and free everything. This might occur a delay if
getaddrinfo() hangs and cannot be interrupted by pthread_cancel().

Destroying resolving happens when another resolve is started on an
easy handle or when the easy handle is closed.

Add test795 to check that connect timeout triggers correctly
when resolving is delayed. Add debug env var `CURL_DNS_DELAY_MS`
to simulate delays in resolving.

Fix test1557 to set `quick_exit` and use `xxx.invalid` as domain
instead of `nothing` that was leading to hangers in CI.

Closes #18263
2025-08-21 09:26:49 +02:00