Commit Graph

462 Commits

Author SHA1 Message Date
Stefan Eissing
cfc657a48d
multi: event based rework
Rework the event based handling of transfers and connections to
be "localized" into a single source file with clearer dependencies.

- add multi_ev.c and multi_ev.h
- add docs/internal/MULTI-EV.md to explain the overall workings
- only do event handling book keeping when the socket callback
  is set
- add handling for "connection only" event tracking, when internal
  easy handles are used that are not really tied to a connection.
  Used in connection pool.
- remove transfer member "last_poll" and connections "shutdown_poll"
  and keep all that internal to multi_ev.c
- add CURL_TRC_M() for tracing of "multi" related things, including
  event handling and connection pool operations. Add new trace
  feature "multi" for trace config.
  multi traces will show exactly what is going on in regard to
  event handling.
- multi: trace transfers "mstate" in every CURL_TRC_M() call
- make internal trace buffer 2048 bytes and end the silliness
  with +n here -m there. Adjust test 1652 expectations of resulting
  length and input edge cases.
- add trace feature "lib-ids" to perfix libcurl traces with transfer
  and connection ids. Useful for debugging libcurl applications.

Closes #16308
2025-02-22 14:47:40 +01:00
Viktor Szakats
2a292c3984
build: add Windows CE / CeGCC support, with CI jobs
Make it possible to build curl for Windows CE using the CeGCC toolchain.
With both CMake and autotools, including tests and examples, also in CI.
The build configuration is the default one with Schannel enabled. No
3rd-party dependencies have been tested.

Also revive old code to make Schannel build with Windows CE, including
certificate verification.

Builds have been throughougly tested. But, I've made no functional tests
for this PR. Some parts (esp. file operations, like truncate and seek)
are stubbed out and likely broken as a result. Test servers build, but
they do not work on Windows CE. This patch substitutes `fstat()` calls
with `stat()`, which operate on filenames, not file handles. This may or
may not work and/or may not be secure.

About CeGCC: I used the latest available macOS binary build v0.59.1
r1397 from 2009, in native `mingw32ce` build mode. CeGCC is in effect
MinGW + GCC 4.4.0 + old/classic-mingw Windows headers. It targets
Windows CE v3.0 according to its `_WIN32_WCE` value. It means this PR
restores portions of old/classic-mingw support. It makes the Windows CE
codepath compatible with GCC 4.4.0. It also adds workaround for CMake,
which cannot identify and configure this toolchain out of the box.

Notes:
- CMake doesn't recognize CeGCC/mingw32ce, necessitating tricks as seen
  with Amiga and MS-DOS.
- CMake doesn't set `MINGW` for mingw32ce. Set it and `MINGW32CE`
  manually as a helper variable, in addition to `WINCE` which CMake sets
  based on `CMAKE_SYSTEM_NAME`.
- CMake fails to create an implib for `libcurl.dll`, due to not
  recognizing the platform as a Windowsy one. This patch adds the
  necessary workaround to make it work.
- headers shipping with CeGCC miss some things curl needs for Schannel
  support. Fixed by restoring and renovating code previously deleted
  old-mingw code.
- it's sometime non-trivial to figure out if a fallout is WinCE,
  mingw32ce, old-mingw, or GCC version-specific.
- WinCE is always Unicode. With exceptions: no `wmain`,
  `GetProcAddress()`.
- `_fileno()` is said to convert from `FILE *` to `void *` which is
  a Win32 file `HANDLE`. (This patch doesn't use this, but with further
  effort it probably could be.)
  https://stackoverflow.com/questions/3989545/how-do-i-get-the-file-handle-from-the-fopen-file-structure
- WinCE has no signals, current directory, stdio/CRT file handles, no
  `_get_osfhandle()`, no `errno`, no `errno.h`. Some of this stuff is
  standard C89, yet missing from this platform. Microsoft expects
  Windows CE apps to use Win32 file API and `FILE *` exclusively.
- revived CeGCC here (not tested for this PR):
  https://building.enlyze.com/posts/a-new-windows-ce-x86-compiler-in-2024/

On `UNDER_CE` vs. `_WIN32_WCE`: (This patch settled on `UNDER_CE`)

- A custom VS2008 WinCE toolchain does not set any of these.
  The compiler binaries don't contain these strings, and has no compiler
  option for targeting WinCE, hinting that a vanilla toolchain isn't
  setting any of them either.
- `UNDER_CE` is automatically defined by the CeGCC compiler.
  https://cegcc.sourceforge.net/docs/details.html
- `UNDER_CE` is similar to `_WIN32`, except it's not set automatically
  by all compilers. It's not supposed to have any value, like a version.
  (Though e.g. OpenSSL sets it to a version)
- `_WIN32_WCE` is the CE counterpart of the non-CE `_WIN32_WINNT` macro.
  That does return the targeted Windows CE version.
- `_WIN32_WCE` is not defined by compilers, and relies on a header
  setting it to a default, or the build to set it to the desired target
  version. This is also how `_WIN32_WINNT` works.
- `_WIN32_WCE` default is set by `windef.h` in CeGCC.
- `_WIN32_WCE` isn't set to a default by MSVC Windows CE headers (the
  ones I checked at least).
- CMake sets `_WIN32_WCE=<ver>`, `UNDER_CE`, `WINCE` for MSVC WinCE.
- `_WIN32_WCE` seems more popular in other projects, including CeGCC
  itself. `zlib` is a notable exception amongst curl dependencies,
  which uses `UNDER_CE`.
- Since `_WIN32_WCE` needs "certain" headers to have it defined, it's
  undefined depending on headers included beforehand.
- `curl/curl.h` re-uses `_WIN32_WCE`'s as a self-guard, relying on
  its not-(necessarily)-defined-by-default property:
  25b445e479/include/curl/curl.h (L77)

Toolchain downloads:
- Windows:
  https://downloads.sourceforge.net/cegcc/cegcc/0.59.1/cegcc_mingw32ce_cygwin1.7_r1399.tar.bz2
- macOS Intel:
  https://downloads.sourceforge.net/cegcc/cegcc/0.59.1/cegcc_mingw32ce_snowleopard_r1397.tar.bz2

Closes #15975
2025-02-21 13:56:34 +01:00
Stefan Eissing
a1850ad7de
cfilter: remove 'blocking' connect handling
Remove `blocking` argument from cfilter's connect method.

Implement blocking behaviour in Curl_conn_connect() instead for all
filter chains.

Update filters implementations. Several of which did never use the
paramter (QUIC for example). Simplifies connect handling in TLS filters
that no longer need to loop

Fixed a blocking connect call in FTP when waiting on a socket accept()
which only worked because the filter did not implement it.

Closes #16397
2025-02-20 11:13:51 +01:00
Daniel Stenberg
ad700a0917
strparse: speed up the hex parser somewhat
Around 2.3x speed-up parsing many large hexadecimal numbers. The decimal and
octal parser get marginally faster.

Still very readable, compact and easy to follow code.

Tweaks

- combine the max and the overflow check, gains 3ns/num (use a separate
  check outside of the loop instead for max < base)
- one less indirection in the pointer, gains 3ns/num
- using the table lookup for hex nums, gains 5ns/num
- unfold the num_digit() macro, gains 3s/num
- use the hexasciitable unconditionally, gains 2ns/num
- use post-increment pointer in the table lookup, gains 1ns/num
- improved valid_digit() using the table for the hex case,
  gains 26 ns/num
- use "max char" in valid_digit(), gains 3ns/num

Behavior changes:

- no longer returns STRE_TOO_BIG - only STRE_OVERFLOW
- does not move the char ** on error, which is probably better

Updated and extended test 1664 (significantly).

Closes #16374
2025-02-19 07:49:06 +01:00
Viktor Szakats
3fd1dfc829
tidy-up: use CURL_ARRAYSIZE()
Follow-up to 13b2ea68f0 #16111

Closes #16381
2025-02-19 00:59:45 +01:00
Daniel Stenberg
b4538ec522
strparse: switch to curl_off_t as base data type
- add hex and octal parsers to the Curl_str_* family
- make curlx_strtoofft use these parsers
- remove all use of strtol() and strtoul() in library code
- generally use Curl_str_* more than strtoofft, for stricter parsing
- supports 64-bit universally, instead of 'long' which differs in size
  between platforms

Extended the unit test 1664 to verify hex and octal parsing.

Closes #16336
2025-02-15 21:58:48 +01:00
Daniel Stenberg
92611f2a56
strparse: switch the API to work on 'const char *'
The functions are not meant to touch the input anyway.

Closes #16316
2025-02-13 11:16:04 +01:00
Viktor Szakats
13b2ea68f0
tidy-up: make per-file ARRAYSIZE macros global as CURL_ARRAYSIZE
Closes #16111
2025-02-07 14:21:59 +01:00
Stefan Eissing
65fca12e63
x509asn1: add parse recursion limit
For ASN.1 tags with indefinite length, curl's own parser for TLS
backends that do not support certificate inspection calls itself
recursively. A malicious server certificate can then lead to high
recursion level exhausting the stack space.

This PR limits the recursion level to 16 which should be safe on all
architectures.

Added unit test 1657 to verify behaviour.

Fixes #16135
Reported-by: z2_
Closes #16137
2025-02-03 20:10:09 +01:00
Viktor Szakats
81e271f45c
checksrc: exclude generated bundle files to avoid race condition
Necessary to catch rare cases when `checksrc` hits these files when they
are not populated yet:
```
./curltool_unity.c:1:1: error: Missing copyright statement (COPYRIGHT)
 ^
```
https://github.com/curl/curl/actions/runs/12995546740/job/36242556713?pr=16094#step:37:123

Follow-up to 71cf0d1fca #14772
Closes #16102
2025-01-27 20:59:47 +01:00
Viktor Szakats
5c31c2e670
tidy-up: .gitignore lines mostly
- `.gitignore`: delete, dedupe and move rules upwards.
  Ref: 6389ba87b8 #13311
- `.gitignore`: fix generated test sources.
  Follow-up to 71cf0d1fca #14772
- `.gitignore`: replace exe listings with a wildcard.
- lib: move `setup-*.h` from `EXTRA_DIST` to `CURL_HFILES`.
- `makedebug.bat`: uppercase an argument to match docs.
- GHA/non-native: delete stray env.
  Follow-up to 12a6de2f66 #16043
- sort source lists.

Closes #16093
2025-01-27 20:59:46 +01:00
Viktor Szakats
7e814c8717
build: fix compiling with GCC 4.x versions
- silence false positive picky warnings.
- avoid "possible noreturn" warnings for standalone tests and examples.
- fix to compile without `#pragma GCC diagnostic push` support.
- fix "#pragma GCC diagnostic not allowed inside functions".

Prerequisite for #15975 that needs GCC 4.4 for the latest pre-built
CeGCC/mingw32ce toolchain for Windows CE.

Cherry-picked from #15975
Closes #16062
2025-01-22 11:26:15 +01:00
Stefan Eissing
515a21f350
vtls: feature ssls-export for SSL session im-/export
Adds the experimental feature `ssls-export` to libcurl and curl for
importing and exporting SSL sessions from/to a file.

* add functions to libcurl API
* add command line option `--ssl-sessions <filename>` to curl
* add documenation
* add support in configure
* add support in cmake
+ add pytest case

Closes #15924
2025-01-08 23:32:07 +01:00
Daniel Stenberg
3eb57d6ba7
docs: use lowercase curl and libcurl
Adjusted badwords to find them.

Plus: make badwords run on all markdown files in the repo and update
markdowns previously unchecked

Closes #15898
2025-01-02 17:15:54 +01:00
Viktor Szakats
a3585c9576
Makefile.mk: drop in favour of autotools and cmake (MS-DOS, AmigaOS3)
`Makefile.mk` supported MS-DOS and Amiga, but `./configure` also
supported them in a better tested and more flexible way.

This patch also adds CMake support for MS-DOS/DJGPP and Amiga OS 3.

`Makefile.mk` was not maintained. Delete it in favour of first-tier
build methods.

Also include some non-MS-DOS/AmigaOS-specific tidy-up, see details at
the end of this message.

Details:

- fix/silence all MS-DOS/DJGPP build warnings and issues.
- add MS-DOS support to cmake.
  - default to `ENABLE_THREADED_RESOLVER=OFF` for MS-DOS.
  - add support for `WATT_ROOT`.
  - use static libcurl with MS-DOS.
  - fixup default CMake suffixes/prefixes for DJGPP.
  - disable hidden symbols for MS-DOS. Not supported on MS-DOS.
  - opt-in MS-DOS into `USE_UNIX_SOCKETS`.
- improve MS-DOS support in autotools.
  - default to `--disable-threaded-resolver` for MS-DOS.
- make sure to use `close_s()` (from Watt-32) with autotools and cmake.
  `Makefile.mk` used it before this patch.
- GHA: add DJGPP cmake (~30s) and autotools (~60s) build jobs.
  Also build tests and examples with cmake.
- improve AmigaOS support in autotools:
  - configure: detect `CloseSocket()` when it's a macro.
  - configure: fix `IoctlSocket` detection on AmigaOS.
  - curl-amissl.m4: pass AmiSSL libs to tests/servers.
- add AmigaOS3 support to cmake:
  - cmake: fix `HAVE_IOCTLSOCKET_CAMEL` and
    `HAVE_IOCTLSOCKET_CAMEL_FIONBIO` detections.
  - set necessary system libs.
  - add AmiSSL support.
  - inet_ntop, inet_pton: fix using it for AmigaOS. cmake detects them,
    and they did not compile with AmigaOS.
  - cmake: better sync `gethostname` detection with autotools.
    Fixes detection for AmigaOS, where `gethostname` is a macro.
  - cmake: fix `sys/utime.h` detection on AmigaOS.
  - cmake: force-disable `getaddrinfo` for AmigaOS.
  - cmake: tweak threading and static/shared default for AmigaOS.
  - cmake: rely on manual variable `AMIGA` to enable the platform.
- GHA: add AmigaOS cmake and autotools (~45s) jobs.
  Also build tests and examples with cmake.
- INSTALL: update MS-DOS and AmigaOS build instructions.
- amigaos: fix `-Wpointer-sign` and
  `zero or negative size array '_args'` in `Printf()`.
- amigaos: fix `-Wpointer-sign`
- amigaos: fix `-Wredundant-decls` `errno` and `h_errno`.
- amigaos: brute-force silence `lseek()` size warnings.
- amigaos: server/resolve: silence `-Wdiscarded-qualifiers`.
- amigaos: server/resolve: fix `-Wpointer-sign`.
- amigaos: fix `CURL_SA_FAMILY_T` type.
- nonblock: prefer `HAVE_IOCTLSOCKET_CAMEL_FIONBIO` for AmigaOS.
  `ioctl` is also detected, but fails when used. Make the above override
  it for a successful build.
  Authored-by: Darren Banfi
  Fixes #15537
  Closes #15603
- tftpd: prefer `HAVE_IOCTLSOCKET_CAMEL_FIONBIO` for AmigaOS.
- tftpd: tidy-up conditional code.
- curl: set stack size to 16384 for AmigaOS3/4
  Overriding the default 4096.
  Suggested-by: Darren Banfi
  Ref: https://github.com/curl/curl/pull/15543#issuecomment-2498783123
  Ref: https://wiki.amigaos.net/wiki/Controlling_Application_Stack
- functypes.h: fix `SEND_QUAL_ARG2` for AmigaOS.
- tftp: add missing cast in sendto() call for AmigaOS.
- getinfo: fix warning with AmigaOS.
- tool_operate: silence warning with AmigaOS
- amigaos: fix building libtests due to missing `RLIMIT_NOFILE`.
- curl_gethostname: silence warning for AmigaOS.
- ftp: silence `-Wtype-limits` for AmigaOS.
- libtest: fix timeval initialization for AmigaOS.
- examples: fix `timeval` initialization for AmigaOS.
- examples: silence warning for AmigaOS.
- configure: fix IPv6 detection for cross-builds.
- netrc: fix to build with AmigaOS cleanly.
- buildinfo: detect and add `DOS` tag for MS-DOS builds.
- buildinfo: add `AMIGA` to buildinfo.txt in auttools.
- build: move `USE_WATT32` macro definition to cmake/configure.

Non-MS-DOS/AmigeOS-specific tidy-ups:

- configure: sync `sa_family_t` detection with cmake.
- configure: sync `ADDRESS_FAMILY` detection signals with cmake.
- doh: use `CURL_SA_FAMILY_T`.
- lib: drop mingw-specific `CURL_SA_FAMILY_T` workaround.
- cmake: extend instead of override check-specific
  configurations/requirements.
  This allows to honor global requirements added earlier.
  Necessary for AmigaOS for example.
- cmake: omit warning on disabled IPv6 for MS-DOS and AmigaOS.
  No IPv6 support on these platforms. Also sync with autotools.
- lib1960: use libcurl `inet_pton()` wrapper.
- cmake: detect LibreSSL (to match autotools).
- cmake: say the specific OpenSSL flavour detected.
- hostip: add missing `HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID` guard.
- lib: simplify classic mac feature guards.

Follow-up to a8861b6ccd #9764

Closes #15543
2024-12-16 23:20:55 +01:00
Viktor Szakats
b9895b9d3f
cmake: namespace functions and macros
Prefix (or suffix) curl-defined macro and function names with `curl`.
To avoid collisions with non-curl CMake and to make them recognizable
as curl-specific calls.

Closes #15498
2024-12-16 21:55:00 +01:00
Daniel Stenberg
d5c738c608
strparse: string parsing helper functions
Designed to aid converting off from sscanf parsers. sscanf is hard to
use right, easy to mess up and often makes for sloppy error checking.

The new parsers allow more exact and pedandic parsing.

This new set of functions should be possible to use (and extend) and
switch over other libcurl parser code to use going forward.

Adapts the following to use the new functions:

- altsvc.c
- hsts.c
- http_aws_sigv4.c

Bonus: fewer memory copies, fewer stack buffers.

Test: Unit test1664

Docs: docs/internals/STRPARSE.md

Closes #15692
2024-12-12 16:00:52 +01:00
Daniel Stenberg
e9b9bbac22
netrc: address several netrc parser flaws
- make sure that a match that returns a username also returns a
  password, that should be blank if no password is found

- fix handling of multiple logins for same host where the password/login
  order might be reversed.

- reject credentials provided in the .netrc if they contain ASCII control
  codes - if the used protocol does not support such (like HTTP and WS do)

Reported-by: Harry Sintonen

Add test 478, 479 and 480 to verify. Updated unit 1304.

Closes #15586
2024-11-17 11:33:56 +01:00
Viktor Szakats
e244d50064
configure: do not echo most inherited LDFLAGS to config files
`libcurl.pc` `Libs.private` (since 8.11.0, and in `Libs` before 7.20.0)
and `curl-config` `--static-libs` (since 7.17.1, and in `Libs` between
7.7.2-7.25.0). This included all flags inherited from the environment,
in addition to those coming from dependency detections.

To avoid spilling all linker flags inherited from the environment to
the libcurl config files, this patch omits them all, except `-L`, `-F`,
`--library-path=` and `-framework` options, which are still passed.
The rationale for the exceptions is that `LIBS` is passed as-is, and
`LDFLAGS`, `LIBS` are the canonical way to pass custom libs options
to a build. `LIBS` may not work without a matching custom libpath.

This brings autotools behaviour closer to cmake, and `curl-config`
closer to `libcurl.pc`.

Follow-up to 9f56bb608e #14681
Follow-up to 4c8adc8fee
Reported-by: Peter Marko
Fixes #15533
Closes #15550
2024-11-14 09:55:45 +01:00
Viktor Szakats
329a8e9daa
unit1307: tidy up Apple OS detection
Use `__APPLE__` macro to detect Apple OS instead of relying on
the string in `CURL_OS`.

This also fixes detection with default CMake builds where `CURL_OS` is
`Darwin`. The code before this patch was expecting this substring in
lowercase.

Closes #15461
2024-10-31 09:09:01 +01:00
Viktor Szakats
fb711b5098
build: fix clang-cl builds, add CI job
- appveyor: add build-only job for clang-cl.

- cmake: `-pedantic-errors` enables `-Werror,-Wlanguage-extension-token`
  automatically, which makes `__int64` detection fail.
  Explictly disable this compiler warning for clang-cl to make the
  feature detection work and to accept `__int64` in the source code.

- cmake: disable `-Wlanguage-extension-token` warning for clang-cl
  to fix these when encountering `__int64`:
  ```
  lib/formdata.c(797,29): error : extension used [-Werror,-Wlanguage-extension-token]
  lib/warnless.c(117,33): error : extension used [-Werror,-Wlanguage-extension-token]
  lib/warnless.c(60,28): message : expanded from macro 'CURL_MASK_SCOFFT'
  lib/warnless.c(59,38): message : expanded from macro 'CURL_MASK_UCOFFT'
  include\curl/system.h(352,40): message : expanded from macro 'CURL_TYPEOF_CURL_OFF_T'
  ```

- make `__GNUC__` warning suppressions apply to `__clang__` too.
  Necessary for clang-cl, which defines the latter, but not the former.
  (Regular clang defines both.)

- examples: fix clang-cl compiler warning in `http2-upload.c`.
  ```
  docs\examples\http2-upload.c(56,5): error : no previous prototype for function 'my_gettimeofday' [-Werror,-Wmissing-prototypes]
  docs\examples\http2-upload.c(56,1): message : declare 'static' if the function is not intended to be used outside of this translation unit
  ```

- unit2604: add missing `#pragma GCC diagnostic pop`.
  Follow-up to e53523fef0 #14859

- unit1652: limit compiler warning suppression to GCC.
  They do not affect clang builds.
  Follow-up to 71cf0d1fca #14772

Closes #15449
2024-10-30 23:15:32 +01:00
Daniel Stenberg
0cececef0f
config: rename the OS define to CURL_OS to reduce collision risk
Reported-by: Jon Rumsey
Fixes #15455
Closes #15457
2024-10-30 14:59:54 +01:00
Viktor Szakats
9126eb5a8a
cmake: replace CURL_*_DIR with {PROJECT,CMAKE_CURRENT}_*_DIR
It reduces the number of synonym variables in the code.
Makes it easier to grok and grep.

- replace `CURL_SOURCE_DIR`
  with `PROJECT_SOURCE_DIR`.

- replace `CURL_BINARY_DIR`
  with `PROJECT_BINARY_DIR` or `CMAKE_CURRENT_BINARY_DIR`.

- replace a single use of `CMAKE_BINARY_DIR`
  with `PROJECT_BINARY_DIR`.

- replace `CMAKE_CURRENT_*_DIR`
  with `PROJECT_*_DIR` where it makes the code more uniform.

- quote an argument (formatting).

Closes #15331
2024-10-22 19:13:08 +02:00
Daniel Stenberg
ad1c49bc0e
lib: remove function pointer typecasts for hmac/sha256/md5
Make sure we use functions with the correct prototype.

Closes #15289
2024-10-15 14:32:39 +02:00
Daniel Stenberg
eb77297ccc
lib: move curl_path.[ch] into vssh/
As this contains code only used by SSH backends.

Closes #15284
2024-10-13 23:16:18 +02:00
Daniel Stenberg
3b43a05e00
netrc: cache the netrc file in memory
So that on redirects etc it does not reread the file but just parses it
again.

Reported-by: Pierre-Etienne Meunier
Fixes #15248
Closes #15259
2024-10-11 14:40:12 +02:00
Stefan Eissing
2400a6c6b2
bufq: unwrite fix
`Curl_bufq_unwrite()` used the head instead of the tail chunk to shrink
the bufq's content. Fix this and add test case that checks correct
behaviour.

Amended test 2601 accordingly.

Reported-by: Chris Stubbs
Closes #15136
2024-10-03 13:27:36 +02:00
Daniel Stenberg
f383a17617
tool_doswin: simplify; remove unused options and strncpy calls
SANITIZE_ALLOW_TRUNCATE and SANITIZE_ALLOW_COLONS were never used by
code, thus only making the code complicated for no good use.

Since nothing should truncate, using strncpy() is wrong.

Two cases of malloc + copy replaced with proper strdup() calls.

Fixup unit test 1604 accordingly.

Closes #15047
2024-09-26 10:45:08 +02:00
Viktor Szakats
4619b4103b
build: fix possible -Wformat-overflow in lib557 with test bundle builds
- lib557: suppress `-Wformat-overflow` warning in source.
  Fixes:
  ```
  lib557.c: In function ‘test_float_formatting’:
  lib557.c:1408:37: error: ‘%*f’ directive output of 2147483648 bytes exceeds ‘INT_MAX’ [-Werror=format-overflow=]
   1408 |   curl_msnprintf(buf, sizeof(buf), "%*f", INT_MIN, 9.1);
        |                                     ^~~
  lib557.c:1408:3: note: ‘curl_msnprintf’ output 2147483649 bytes
   1408 |   curl_msnprintf(buf, sizeof(buf), "%*f", INT_MIN, 9.1);
        |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  ```
  Ref: https://app.circleci.com/pipelines/github/curl/curl/10226/workflows/87642ee9-cda6-4916-8206-c82aac5f595e/jobs/107669?invite=true#step-106-40996_46

  The root cause of why this option gets enabled remains undiscovered.

  Reported-by: Daniel Stenberg
  Fixes #15008
  Follow-up to 71cf0d1fca #14772

- build: drop `-Wno-format-overflow` from picky warning list.
  These options only get used with picky warnings enabled.
  Follow-up to 145f87b9e8 #14598

- unit1652: suppress in source (and not rely on picky warnings anymore.)

Closes #15012
2024-09-23 11:52:55 +02:00
Daniel Stenberg
44fc2687b1
tests: libtests and unit tests need explicit #include memdebug
... as otherwise they do not monitor the resource use within the test
files - until they are unity built.

Closes #15007
2024-09-22 21:25:31 +02:00
Viktor Szakats
71cf0d1fca
tests: speed up builds with single-binary test bundles
Add support for single-block binaries that contain all libtests and
unit tests respectively.

Enable with:
- autotools: `--enable-test-bundles`
- cmake: `-DCURL_TEST_BUNDLES=ON`

(They are compatible with `--enable-unity` and `-DCMAKE_UNITY_BUILD=ON`
options, for further speed-up.)

Makes libtests and unit tests build _fast_, needing little disk space
even in static mode. Similar to CMake unity mode, but with a custom
script, also supporting autotools builds.

The price is having to deal with symbols/macros colliding between
`lib*.c` and `unit*.c` sources. Maybe with naming conventions or other
solutions this can be improved gradually and reduce the need for manual
intervention by `mk-bundle.mk`. I've included a script that does the bulk
of detecting name collisions.

Also:
- CI: enable test bundles.
- CI: build tests in more jobs.
- lib2305: fix FILE handle leak.
- unit1661: fix memleak found by torture test by releasing the `bufref`
  structure in `unit_stop()` that was allocated in `unit_setup()`.
  ```
  test 1661...[bufref unit tests]
  Leak detected: memory still allocated: 13 bytes
   allocated by /home/runner/work/curl/curl/tests/unit/unit1661.c:70
   1661: torture FAILED: function number 1 in test.
  ```
  Ref: https://github.com/curl/curl/actions/runs/10967279334/job/30456745290?pr=14772#step:8:41

Similar test suite builds with autotools default and cmake+bundle+unity:
- GHA/Linux: 33s vs 7s
  https://github.com/curl/curl/actions/runs/10705668823/job/29681617374
- GHA/macOS 34s vs 2s
  https://github.com/curl/curl/actions/runs/10705668813/job/29681632885
- GHA/FreeBSD: 15m25 vs 6m21 (full workflow time, ~qemu)
  https://github.com/curl/curl/actions/runs/10705668811/job/29681607915
- GHA/Cygwin: 9m52 vs 32s
  https://github.com/curl/curl/actions/runs/10705668809/job/29681609965
- GHA/MSYS2: 3m52 vs 14s
  https://github.com/curl/curl/actions/runs/10705668808/job/29681624295
- GHA/mingw-w64: 5m45 vs 30s
  https://github.com/curl/curl/actions/runs/10705668808/job/29681628787

Autotools test suite builds compared between master -> `--enable-test-bundles`:
- GHA/Linux: 33s -> 9s (run tests: 22m23 -> 20m44)
  https://github.com/curl/curl/actions/runs/10710030193/job/29695932185
  https://github.com/curl/curl/actions/runs/10967831456/job/30458220344
- GHA/macOS: 25s -> 4s (run tests: 2m58 -> 2m24)
  https://github.com/curl/curl/actions/runs/10710030195/job/29695938444
  https://github.com/curl/curl/actions/runs/10967831452/job/30458225762
- GHA/non-native (FreeBSD): 4m8 -> 3m12 (full workflow time, ~qemu)
  https://github.com/curl/curl/actions/runs/10710030198/job/29695928401
  https://github.com/curl/curl/actions/runs/10967831458/job/30458212692
- GHA/Cygwin: 9m25 -> 1m9 (run tests: 9m19 -> 3m28)
  https://github.com/curl/curl/actions/runs/10710030212/job/29695928213
  https://github.com/curl/curl/actions/runs/10967831453/job/30458213268
- GHA/MSYS2: 3m54 -> 32s (run tests: 6m3 -> 3m59)
  https://github.com/curl/curl/actions/runs/10710030190/job/29704850591
  https://github.com/curl/curl/actions/runs/10967831449/job/30459280005
- GHA/mingw-w64: 5m42 -> 1m5 (run tests: 7m41 -> 5m36)
  https://github.com/curl/curl/actions/runs/10710030190/job/29704852058
  https://github.com/curl/curl/actions/runs/10967831449/job/30459280862
- Azure MSYS2 mingw64 openssl: 38m55 -> 11m58
  https://dev.azure.com/daniel0244/curl/_build/results?buildId=25546&view=logs&j=b58b8c59-0f61-52e9-0f9e-fad562a1e77f&t=0f9230a7-3b10-53ca-9938-700ece377c5e
  https://dev.azure.com/daniel0244/curl/_build/results?buildId=25547&view=logs&jobId=39473db1-3945-55d5-deb5-c218fad88dce&j=b58b8c59-0f61-52e9-0f9e-fad562a1e77f&t=0f9230a7-3b10-53ca-9938-700ece377c5e
- Azure Ubuntu default: 2m15 -> 55s (all build)
  https://dev.azure.com/daniel0244/curl/_build/results?buildId=25546&view=logs&j=9d58b9ac-e1e6-53b6-f83a-1f9f1d912522&t=a6b38d83-e7cf-5a9b-c762-a178412717b7
  https://dev.azure.com/daniel0244/curl/_build/results?buildId=25547&view=logs&jobId=39473db1-3945-55d5-deb5-c218fad88dce&j=9d58b9ac-e1e6-53b6-f83a-1f9f1d912522&t=a6b38d83-e7cf-5a9b-c762-a178412717b7

Cmake test suite builds compared between master -> `-DCURL_TEST_BUNDLES=ON` + unity:
- GHA/Linux: 29s -> 7s (run tests: 4m50 -> 4m57, 20m43 -> 20m45)
  https://github.com/curl/curl/actions/runs/10710030193/job/29695941814
  https://github.com/curl/curl/actions/runs/10705668823/job/29681622201
- GHA/Linux old: 44s -> 13s (bundle+no unity) (run tests: 5m5 -> 5m6)
  https://github.com/curl/curl/actions/runs/10718264094/job/29719794727
  https://github.com/curl/curl/actions/runs/10718653175/job/29721009613
- GHA/macOS: 32s -> 2s (run tests: 2m43 -> 2m40)
  https://github.com/curl/curl/actions/runs/10710030195/job/29695931956
  https://github.com/curl/curl/actions/runs/10705668813/job/29681638937
- GHA/non-native (*BSD): inconclusive (full workflow time, ~qemu)
  https://github.com/curl/curl/actions/runs/10710030198
  https://github.com/curl/curl/actions/runs/10705668811
- GHA/Cygwin: 3m9 -> 32s
  https://github.com/curl/curl/actions/runs/10710030212/job/29695929075
  https://github.com/curl/curl/actions/runs/10705668809/job/29681609965
- GHA/MSYS2: 2m24 -> 14s
  https://github.com/curl/curl/actions/runs/10710030190/job/29704850996
  https://github.com/curl/curl/actions/runs/10705668808/job/29681624295
- GHA/mingw-w64: 3m56 -> 30s (run tests: 4m2 -> 3m52)
  https://github.com/curl/curl/actions/runs/10710030190/job/29704852219
  https://github.com/curl/curl/actions/runs/10705668808/job/29681631393
- GHA/mingw-w64-old: 7m19 -> 1m44 (run tests: 3m30 -> 2m53)
  https://github.com/curl/curl/actions/runs/10710030190/job/29704849763
  https://github.com/curl/curl/actions/runs/10705668808/job/29681622329
- GHA/MSVC: 3m22 -> 13s (run tests: 9m43 -> 4m22)
  https://github.com/curl/curl/actions/runs/10710030190/job/29704850411
  https://github.com/curl/curl/actions/runs/10705668808/job/29681623313
- AppVeyor CI MSVC 2008: 4m3 -> 45s (full build)
- AppVeyor CI MSVC 2010: 2m56 -> 1m8 (full build)
- AppVeyor CI MSVC 2022: 10m19 -> 2m23 (full build)
  https://ci.appveyor.com/project/curlorg/curl/builds/50538455
  https://ci.appveyor.com/project/curlorg/curl/builds/50536558
- AppVeyor CI total build time: 10m30 (master) -> 6m48 (unity) -> 4m5 (bundle) -> 3m24 (bundle+unity) -> 5m7 (bundle+unity+all jobs building tests)

Closes #14772
2024-09-22 09:51:15 +02:00
Viktor Szakats
5cefda1b93
build: tidy up deprecation suppression, enable warnings for clang
Suppress deprecation warnings the closest to the deprecated code, using
`CURL_IGNORE_DEPRECATION()`. Then drop build-specific suppressions, and
file-wide ones. The latter is not compatible with Unity mode. Also
replace manual suppressions with a macro to apply to all compilers with
deprecation warning support. Also enable deprecation warnings for clang.

- curl/curl.h: enable deprecation warnings for clang.

- docs/examples: stop setting `CURL_DISABLE_DEPRECATION` with autotools.
  Suppression moved to C-level earlier. Syncs with cmake.
  Follow-up to 5fc61a37c1 #14123

- tests/http/clients: stop setting `CURL_DISABLE_DEPRECATION` in
  autotools. If it becomes necessary in the future, it can be done in
  C via the macro. Syncs with cmake.

- lib1545: stop setting `CURL_DISABLE_DEPRECATION` in autotools.
  Drop guard from test source.
  Follow-up to 0f10360073 #12444

- libtest, unit: replace `CURL_DISABLE_DEPRECATION` with
  `CURL_IGNORE_DEPRECATION()`.

- docs/examples: replace pragmas with `CURL_IGNORE_DEPRECATION()`.

Closes #14789
2024-09-21 00:59:52 +02:00
Viktor Szakats
3434c6b46e
unit1660: fix unreachable code warning in no-SSL builds
Or no-HTTP, no-HSTS builds, also MSH3 builds.

CMake, VS2022, Debug, x64, no SSL, Static, Build-only:
```
C:\projects\curl\tests\unit\unit1660.c(46,1): error C2220: the following warning is treated as an error
C:\projects\curl\tests\unit\unit1660.c(46,1): warning C4702: unreachable code
```
Ref: https://ci.appveyor.com/project/curlorg/curl/builds/50531210/job/cjewvo9agavthr3o#L216

Required-by: #14922
Cherry-picked from #14772
Closes #14971
2024-09-19 23:06:09 +02:00
Viktor Szakats
3efba94f77
cmake: allow building tests in unity mode
Makes building tests noticeably faster.

Apply changes/fixes/workarounds to make Unity work:
- rename test variables to avoid collisions or shadowing each other when
  combined into single units.
- add workaround to avoid applying `lib/memdebug.h` overrides to system
  headers declaring/defining `getaddrinfo()`/`freeaddrinfo()` for
  `tests/server/resolve.c`. This replaces a previous workaround that
  worked for that specific source.
- rename test macro `CTRL` clashing with Cygwin `sys/ioctl.h`.
- add include guard to `test.h`.

Also:
- exclude `tests/http/clients` which are all single-source. (like
  `docs/examples`.)

Build time improvements for tests:
- AppVeyor CI:
  - MSVC 2008, 2010: 1 minute faster (4m8s -> 2m56s, 3m19s -> 2m24s)
  - MSVC 2022 arm64: 3.5 minutes faster (10m18s -> 6m48s)
  before: https://ci.appveyor.com/project/curlorg/curl/builds/50522785
  after: https://ci.appveyor.com/project/curlorg/curl/builds/50522942
- GHA:
  - Cygwin: 1.5 minutes faster (3m13s -> 1m43s)
    before: https://github.com/curl/curl/actions/runs/10681535327/job/29605384398
    after: https://github.com/curl/curl/actions/runs/10680818726/job/29603130637
  - Windows:
    before: https://github.com/curl/curl/actions/runs/10680818713
    after: https://github.com/curl/curl/actions/runs/10683850187
    - MSYS2, mingw-w64: 1 minute faster
    - MSVC: 30 seconds faster (3m17s -> 2m48s)
  - macOS: double speed (39s -> 18s)
    before: https://github.com/curl/curl/actions/runs/10680818753/job/29603133447
    after: https://github.com/curl/curl/actions/runs/10683850174/job/29612914515
  - Linux: almost double speed (30/31s -> 18s)
    before: https://github.com/curl/curl/actions/runs/10681535311/job/29605387156
    after: https://github.com/curl/curl/actions/runs/10680818721/job/29603133976
  - non-native: no obvious effect.
    before: https://github.com/curl/curl/actions/runs/10680818722
    after: https://github.com/curl/curl/actions/runs/10683850187
  - Old Linux: Unity mode not supported by old CMake, no effect.

Closes #14765
2024-09-19 21:32:58 +02:00
Daniel Stenberg
fbf5d507ce
lib/src: white space edits to comply better with code style
... as checksrc now finds and complains about these.

Closes #14921
2024-09-19 14:59:12 +02:00
Gabriel Marin
5a263710f6
lib, src, tests: added space around ternary expressions
Closes #14912
2024-09-18 15:27:26 +02:00
Viktor Szakats
e53523fef0
CI: move Azure jobs to GHA, fix fallouts, sshserver, runtests tweaks
CI:

- GHA/windows: enable OpenSSH server, SysInternals `handle`, `impacket`.
  Skip `impacket` on MSYS2 due to install failure.
  Skip OpenSSH server for old/standalone mingw-w64 (building curl
  without SSH there.)
- GHA/windows: make test tool installs a separate step.
- GHA/cygwin: enable OpenSSH server.
  Skip `impacket`: it's compiling for 7 minutes then breaks.
  Skip `stunnel` due to sluggish test run performance.
  (This update is unrelated to Azure jobs.)
- GHA/linux: migrate Linux jobs from Azure CI.
- GHA/linux: migrate scanbuild job from Azure CI.
- GHA/linux: enable libssh2 in a job. Also enable valgrind.
- CI/windows: enable SSPI in two jobs.
- CI/windows: disable zlib in one more job.
- CI/windows: improve `if` condition checking GnuTLS.
- CI/windows: ignore SFTP/SCP tests as necessary.
  - universally ignore SCP tests, they fail everywhere.
  - ignore test 612.
  - ignore test 613 616 618 with MSYS2 mingw-w64.
  - ignore test 614 with libssh.
  - ignore all SFTP with MSYS2 native.
  - ignore all SFTP with vcpkg with `libssh2[core,zlib]`.
  - ignore a couple of SFTP tests with MSYS2 mingw-w64.
  (This matches settings on Azure CI.)
- GHA/windows: ignore failing 1451 'Basic SMB request' test for
  old mingw-w64 7.3.0 (but not for 9.5.0!):
  ```
  2024-09-11 21:45:59,738 ERROR smbComNegotiate: b'NT LM 0.12\x00' is not in list
  [...]
  curl: (7) Could not connect to server
  [...]
  FAIL 1451: 'Basic SMB request' SMB
  ```
  Ref: https://github.com/curl/curl/actions/runs/10816280746/job/30007130770#step:13:3546
- CI/Azure: delete, now moved to GHA.

sshserver:

- sshserver: fix permissions for SSH host key on Windows, allowing sshd
  to launch.
- sshserver: fix initializing config paths with Cygwin/MSYS2 sshd.
- sshserver: fix initializing config paths in parallel builds.
- sshserver: delete redundant `DenyUsers`. This also opens the way
  to allow multiple usernames.
- sshserver: fix `AllowUsers` for GHA/windows, by allowing the
  domainless username again.
  Follow-up to 3ee7c676ec #5721
- sshserver: fix `Deprecated option` warnings in `sshd_config`:
  ```
  D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 7: Deprecated option AuthorizedKeysFile2
  D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 25: Deprecated option KeyRegenerationInterval
  D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 35: Deprecated option RhostsRSAAuthentication
  D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 36: Deprecated option RSAAuthentication
  D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 37: Deprecated option ServerKeyBits
  D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 41: Deprecated option UseLogin
  ```
- sshserver: fix `Deprecated option` warnings in `ssh_config` with
  Cygwin/MSYS2.
- sshserver: fix dumping config files due to the filenames missing their
  full paths.
- sshserver: add workaround to make `logmsg` messages visible.
  Before this patch they only went to a file and never shown.

runtests:

- runtests: log details when these Windows commands are called:
  `handle`, `taskkill`, `tasklist`.
- runtests: add documentation links to Windows tools:
  `handle`, `taskkill`, `tasklist`, `icacls`.
- runtests: add `-t` (kill whole tree) option to `taskkill` in
  `servers.pm`, syncing it with the other `taskkill` call.
  Follow-up to bc72a78a11 #14488
- runtests: show warning if Sysinternals `handle` tool is missing.
- runtests: drop Windows XP Home compatibility `tskill` call.
  The call was made on all Windows versions. It's possibly overkill to
  do this, because XP Home is probably rarely used for running curl
  tests these days. In case it's needed, it'd be better to put it under
  an explicit option.
- runtests: show Perl version and path.

Fix/silence fallouts:

- unit2603: fix building with disabled HTTP support.
- unit2604: silence `-Woverlength-strings` warnings in C89 mode.
- test437, test1614: fix to pass with no-IPv6 builds.

Closes #14859
2024-09-16 10:00:17 +02:00
Daniel Stenberg
81300c30e2
unit1398: test maximum input parameters/output segments
...for the mprintf() code

Closes #14833
2024-09-09 16:49:46 +02:00
Stefan Eissing
435dd8aa6e
doh: cleanups
Mostly cleanup on identifiers of DoH code.
Always use 'Curl_doh_cleanup()' for releasing resources.

More concise and telling names (ymmv):

* prefix all static functions with 'doh_' for unity builds
* doh_encode -> doh_req_encode
* doh_decode -> doh_resp_decode
* struct dohdata -> struct doh_probes
* probe's 'serverdoh' -> 'resp_body'
* probe's 'dohbuffer' -> 'req_body'
* probe's 'headers' -> 'req_hds'
* 'dohprobe()' -> doh_run_probe()'
* 'DOH_PROBE_SLOTS' -> 'DOH_SLOT_COUNT'
* 'DOH_PROBE_SLOT_IPADDR_V4' -> 'DOH_SLOT_IPV4'
* 'DOH_PROBE_SLOT_IPADDR_V6' -> 'DOH_SLOT_IPV6'
* 'DOH_PROBE_SLOT_HTTPS' -> 'DOH_SLOT_HTTPS_RR'

Closes #14783
2024-09-06 08:58:52 +02:00
Stefan Eissing
81a3342877
connect: always prefer ipv6 in IP eyeballing
Always try ipv6 addresses first, ipv4 second after a delay.

If neither ipv4/6 are amongst the supplied addresses, start a happy
eyeballer for the first address family present. This is for AF_UNIX
connects.

Fixes #14761
Reported-by: janedenone on hackerone
Closes #14768
2024-09-03 16:24:42 +02:00
Viktor Szakats
573e7e827e
lib, src: delete stray curl_ prefix from printf calls
Also:
- unit1398: delete redundant `curl/mprintf.h` include.

Closes #14664
2024-08-26 11:00:15 +02:00
Viktor Szakats
8b09138083
cmake: minor tidy-ups
- show `OpenSSL v3+` when detected (as in `./configure`).
  (this string also makes its way to `curl-config`.)
- prefer `unset(VAR)` over `set(VAR)`.
  Same effect, but `unset()` tells the intent unambiguously.
  https://cmake.org/cmake/help/latest/command/set.html
- drop "implementation" from an `option()` description.
- FindGSS: replace legacy keyword alias with modern alternative.
  https://cmake.org/cmake/help/latest/command/get_filename_component.html
- move `CURL_STATIC_CRT` logic next to its `option()`.
- improve order of `libcurl.pc`/`curl-config` variable init lines.
- tests: drop/shorten custom target names.
  They inflated generated make files by 550KB.
  Keep target name logic for sync between code snippets.
  Follow-up to a2ef5d36b3 #14660
- clear a variable after use.
- restore `STATUS` for `Features:`/`Protocols:` `message()`s:
  Without it the output goes to stderr, and appears in red in CMake GUI.
  It doesn't seem possible to show a line on stdout without leading
  underscores to match `curl -V` and `./configure` output.
  Partial revert of acbc6b703f #14197
- WindowsCache: move `HAVE_LINUX_TCP_H` into the header group.
- move strings to the same line as their `STRING` keyword.
- formatting in generated code.
- delete bogus comment.
- unfold lines for readability.
- fix a too long line. (for cmakelint)
- missing quotes, whitespace, comments.

Closes #14610
2024-08-26 11:00:08 +02:00
Viktor Szakats
a2ef5d36b3
cmake: sync code between test/example targets
- reuse local variable names.
- sync `PROJECT_LABEL`, add where missing.
- namespace all target names.
- bind header directories to each target.
- tests/server: limit `CURL_STATICLIB` to Windows (as in autotools.)
- drop functions with a single caller.

Closes #14660
2024-08-23 18:42:56 +02:00
Viktor Szakats
c04504885d
src: fix potential macro confusion in cmake unity builds
Sources used `lib/curlx.h` with both `ENABLE_CURLX_PRINTF` set and unset
before including it.

In a cmake "unity" batch where the first included source had it unset,
the next sources did not get the macros requested with
`ENABLE_CURLX_PRINTF` because `lib/curl.x` had already been included
without them.

Fix it by by making the macros enabled permanently and globally for
internal sources, and dropping `ENABLE_CURLX_PRINTF`.

This came up while testing unity builds with smaller batches. The full,
default unity build where all `src` is bundled up in a single unit, was
not affected.

Fixes:
```
$ cmake -B build -DCMAKE_UNITY_BUILD=ON -DCMAKE_UNITY_BUILD_BATCH_SIZE=15
$ make -C build
...
curl/src/tool_getparam.c: In function ‘getparameter’:
curl/src/tool_getparam.c:2409:11: error: implicit declaration of function ‘msnprintf’; did you mean ‘vsnprintf’? [-Wimplicit-function-declaration]
 2409 |           msnprintf(buffer, sizeof(buffer), "%" CURL_FORMAT_CURL_OFF_T "-",
      |           ^~~~~~~~~
      |           vsnprintf
curl/src/tool_getparam.c:2409:11: warning: nested extern declaration of ‘msnprintf’ [-Wnested-externs]
[...]
```

Reported-by: Daniel Stenberg
Bug: https://github.com/curl/curl/pull/14626#issuecomment-2301663491

Closes #14632
2024-08-22 10:45:04 +02:00
Daniel Stenberg
b0b4b481b5
setopt: allow CURLOPT_INTERFACE to be set to NULL
Ref: https://github.com/curl/curl/discussions/14299#discussioncomment-10393909
Regression from 3060557af7 (shipped in 8.9.0)

Closes #14629
2024-08-21 14:33:51 +02:00
Jay Satiro
778391334e unit1300: fix checksrc longline warnings
Closes https://github.com/curl/curl/pull/14624
2024-08-21 03:37:29 -04:00
Jan Venekamp
1e03d4bc0b
rustls: add support for setting TLS version and ciphers
Add support for CURLOPT_SSLVERSION, CURLOPT_TLS13_CIPHERS and
CURLOPT_SSL_CIPHER_LIST.

Closes #14535
2024-08-16 09:55:02 +02:00
Daniel Stenberg
dcb51bafab
splay: use access functions, add asserts, use Curl_timediff
- add set/get functions for the custom data in a tree node

- use Curl_timediff for time comparisons instead of the custom macro, as they
  do the exact same things.

- add asserts to catch mistakes better

- updated test 1309 accordingly

Closes #14562
2024-08-16 09:12:13 +02:00
Daniel Stenberg
c0233a35da
hash: provide asserts to verify API use
- converted the Curl_hash_count() macro to a function

- Discourage accessing struct fields directly

- Document the internal API in HASH.md

Closes #14503
2024-08-15 08:54:19 +02:00
Viktor Szakats
af73743f86
curl_sha512_256: fix symbol collisions with nettle library
`SHA512_256_BLOCK_SIZE`, `SHA512_256_DIGEST_SIZE` macros were both
defined within curl and also in the nettle library required by GnuTLS.

Fix it by namespacing the curl macros.

Cherry-picked from #14495
Closes #14514
2024-08-13 10:04:06 +02:00