9bf79d0a5a
The reverted commit introduced a logic error in code that was
correct.
The client using libcurl would notice the error since FTP file
uploads in active transfer mode would somtimes complete with
success despite no transfer having been performed and the
"uploaded" file thus not being on the remote server afterwards.
The FTP server would notice the error because it receives a
RST on the data connection it has established with the client
before any data was transferred at all.
The logic error happens if the STOR response from the server have
arrived by the time ftp_multi_statemach() in the affected code path
is called, but the incoming data connection have not arrived yet.
In that case, the processing of the STOR response will cause
'ftpc->wait_data_conn' to be set to TRUE, contradicting the comment
in the code. Since 'complete' will also be set, later logic would
believe the transfer was done.
In most cases, the STOR response will not have arrived yet when
the affected code path is executed, or the incoming connection will
also have arrived, and thus the error would not express itself.
But if the speed difference of the device using libcurl and the
FTP server is exactly right, the error may happen as often as in
one out of hundred file transfers.
This reverts commit
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| .circleci | ||
| .github | ||
| .muse | ||
| CMake | ||
| docs | ||
| include | ||
| lib | ||
| m4 | ||
| packages | ||
| plan9 | ||
| projects | ||
| scripts | ||
| src | ||
| tests | ||
| winbuild | ||
| zuul.d | ||
| .azure-pipelines.yml | ||
| .cirrus.yml | ||
| .dcignore | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| .lgtm.yml | ||
| .mailmap | ||
| acinclude.m4 | ||
| appveyor.yml | ||
| buildconf | ||
| buildconf.bat | ||
| CHANGES | ||
| CMakeLists.txt | ||
| configure.ac | ||
| COPYING | ||
| curl-config.in | ||
| GIT-INFO | ||
| libcurl.pc.in | ||
| MacOSX-Framework | ||
| Makefile.am | ||
| Makefile.dist | ||
| maketgz | ||
| README | ||
| README.md | ||
| RELEASE-NOTES | ||
| SECURITY.md | ||
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: https://curl.se/support.html
Website
Visit the curl website for the latest news and downloads.
Git
To download the very latest source from the Git server do this:
git clone https://github.com/curl/curl.git
(you'll 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.
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