Curl is a tool and libcurl is a library for transferring data with URL syntax, supporting FTP, FTPS, HTTP, HTTPS, GOPHER, TFTP, SCP, SFTP, TELNET, DICT, LDAP, LDAPS, FILE, IMAP, SMTP, POP3, RTSP and RTMP. libcurl offers a myriad of powerful features
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cf-socket: turn off IPV6_V6ONLY on Windows if it is supported
IPV6_V6ONLY refs:
https://en.wikipedia.org/wiki/IPv6#IPv4-mapped_IPv6_addresses
https://github.com/golang/go/blob/master/src/net/ipsock_posix.go
https://en.wikipedia.org/wiki/Unix-like
https://learn.microsoft.com/en-us/windows/win32/winsock/ipproto-ipv6-socket-options

default value refs:
https://datatracker.ietf.org/doc/html/rfc3493#section-5.3
https://www.kernel.org/doc/html/latest/networking/ip-sysctl.html#proc-sys-net-ipv6-variables

Closes #10975
2023-04-26 23:39:57 +02:00
.circleci CI: update wolfssl / wolfssh to 5.5.4 / 1.4.12 2023-02-13 17:13:32 +01:00
.github tests/http: more tests with specific clients 2023-04-26 23:24:46 +02:00
.lift tests/http: more tests with specific clients 2023-04-26 23:24:46 +02:00
.reuse packages: remove Android, update README 2023-02-06 08:18:21 +01:00
CMake cmake: speed up and extend picky clang/gcc options 2023-04-16 22:28:25 +00:00
LICENSES copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
docs tests/http: more tests with specific clients 2023-04-26 23:24:46 +02:00
include CURLPROXY_HTTPS2: for HTTPS proxy that may speak HTTP/2 2023-04-08 00:27:53 +02:00
lib cf-socket: turn off IPV6_V6ONLY on Windows if it is supported 2023-04-26 23:39:57 +02:00
m4 autotools: sync up clang picky warnings with cmake 2023-04-17 11:35:56 +00:00
packages OS400: provide ILE/RPG usage examples 2023-04-18 16:14:00 -04:00
plan9 copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
projects build-openssl.bat: keep OpenSSL 3 engine binaries 2023-02-18 19:02:24 -05:00
scripts scripts/delta: fix "ambiguous argument" when used in branches 2023-03-18 10:22:58 +01:00
src src/tool_operhlp.c: fix value stored to 'uerr' is never read 2023-04-17 09:07:07 +02:00
tests tests/http: more tests with specific clients 2023-04-26 23:24:46 +02:00
winbuild winbuild: fix makefile clean 2023-02-23 03:49:37 -05:00
.azure-pipelines.yml CI: don't run CI jobs if only another CI was changed 2023-04-24 20:46:09 -07:00
.cirrus.yml CI: skip some more builds when possible 2023-03-24 19:59:50 -07:00
.dcignore copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.dir-locals.el copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.git-blame-ignore-revs copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.gitattributes copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.gitignore copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.mailmap rtsp: skip malformed RTSP interleaved frame data 2023-03-30 09:59:09 +02:00
CHANGES curl.se: new home 2020-11-04 23:59:47 +01:00
CMakeLists.txt cmake: speed up and extend picky clang/gcc options 2023-04-16 22:28:25 +00:00
COPYING copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
GIT-INFO GIT-INFO: rephrase to adapt to s/buildconf/autoreconf 2021-09-24 13:14:52 +02:00
MacOSX-Framework copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
Makefile.am cmake: speed up and extend picky clang/gcc options 2023-04-16 22:28:25 +00:00
Makefile.dist copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
README docs: minor grammar fixes 2022-09-29 10:44:12 +02:00
README.md copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
RELEASE-NOTES RELEASE-NOTES: synced 2023-04-25 09:49:41 +02:00
SECURITY.md copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
acinclude.m4 copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
appveyor.yml CI: don't run CI jobs if only another CI was changed 2023-04-24 20:46:09 -07:00
buildconf copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
buildconf.bat copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
configure.ac tests/http: more tests with specific clients 2023-04-26 23:24:46 +02:00
curl-config.in copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
libcurl.pc.in copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
maketgz copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
mlc_config.json mlc: curl.zuul.vexxhost.dev is reachable again 2022-04-24 23:29:38 +02:00

README.md

curl logo

Curl is a command-line tool for transferring data specified with URL syntax. Find out how to use curl by reading the curl.1 man page or the MANUAL document. Find out how to install Curl by reading the INSTALL document.

libcurl is the library curl is using to do its job. It is readily available to be used by your software. Read the libcurl.3 man page to learn how.

You can find answers to the most frequent questions we get in the FAQ document.

Study the COPYING file for distribution terms.

Contact

If you have problems, questions, ideas or suggestions, please contact us by posting to a suitable mailing list.

All contributors to the project are listed in the THANKS document.

Commercial support

For commercial support, maybe private and dedicated help with your problems or applications using (lib)curl visit the support page.

Website

Visit the curl website for the latest news and downloads.

Git

To download the latest source from the Git server, do this:

git clone https://github.com/curl/curl.git

(you will get a directory named curl created, filled with the source code)

Security problems

Report suspected security problems via our HackerOne page and not in public.

Notice

Curl contains pieces of source code that is Copyright (c) 1998, 1999 Kungliga Tekniska Högskolan. This notice is included here to comply with the distribution terms.

Backers

Thank you to all our backers! 🙏 [Become a backer]

Sponsors

Support this project by becoming a sponsor.