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2020-03-07pause: force a connection (re-)check after unpausingDaniel Stenberg
There might be data available that was already read off the socket, for example in the TLS layer. Reported-by: Anders Berg Fixes #4966 Closes #5049
2020-03-06pause: bail out on bad inputDaniel Stenberg
A NULL easy handle or an easy handle without an associated connection cannot be paused or unpaused. Closes #5050
2020-03-06pause: return early for calls that don't change pause stateDaniel Stenberg
Reviewed-by: Patrick Monnerat Ref: #4833 Closes #5026
2020-03-05Revert "pause: force-drain the transfer on unpause"Daniel Stenberg
This reverts commit fa0216b294af4c7113a9040ca65eefc7fc18ac1c (from #5000) Clearly that didn't solve the problem correctly. Reported-by: Christopher Reid Reopens #4966 Fixes #5044
2020-03-02Revert "mime: latch last read callback status."Daniel Stenberg
This reverts commit 87869e38d7afdec3ef1bb4965711458b088e254f. Fixes #5014 Closes #5015 Reopens #4833
2020-03-02mime: latch last read callback status.Patrick Monnerat
In case a read callback returns a status (pause, abort, eof, error) instead of a byte count, drain the bytes read so far but remember this status for further processing. Takes care of not losing data when pausing, and properly resume a paused mime structure when requested. New tests 670-673 check unpausing cases, with easy or multi interface and mime or form api. Fixes #4813 Reported-by: MrdUkk on github Closes #4833
2020-02-29pause: force-drain the transfer on unpauseDaniel Stenberg
... since the socket might not actually be readable anymore when for example the data is already buffered in the TLS layer. Fixes #4966 Reported-by: Anders Berg Closes #5000
2020-02-27http2: make pausing/unpausing set/clear local stream windowDaniel Stenberg
This reduces the HTTP/2 window size to 32 MB since libcurl might have to buffer up to this amount of data in memory and yet we don't want it set lower to potentially impact tranfer performance on high speed networks. Requires nghttp2 commit b3f85e2daa629 (https://github.com/nghttp2/nghttp2/pull/1444) to work properly, to end up in the next release after 1.40.0. Fixes #4939 Closes #4940
2020-02-12easy: remove dead codeJay Satiro
multi is already assigned to data->multi by curl_multi_add_handle. Closes https://github.com/curl/curl/pull/4900
2020-01-28global_init: move the IPv6 works status bool to multi handleDaniel Stenberg
Previously it was stored in a global state which contributed to curl_global_init's thread unsafety. This boolean is now instead figured out in curl_multi_init() and stored in the multi handle. Less effective, but thread safe. Closes #4851
2020-01-26global_init: assume the EINTR bit by defaultDaniel Stenberg
- Removed from global_init since it isn't thread-safe. The symbol will still remain to not break compiles, it just won't have any effect going forward. - make the internals NOT loop on EINTR (the opposite from previously). It only risks returning from the select/poll/wait functions early, and that should be risk-free. Closes #4840
2020-01-24wolfssh: make it init properly via Curl_ssh_init()Daniel Stenberg
Closes #4846
2020-01-12wolfSSH: new SSH backendDaniel Stenberg
Adds support for SFTP (not SCP) using WolfSSH. Closes #4231
2019-12-02global_init: undo the "intialized" bump in case of failureDaniel Stenberg
... so that failures in the global init function don't count as a working init and it can then be called again. Reported-by: Paul Groke Fixes #4636 Closes #4653
2019-11-17lib: Move lib/ssh.h -> lib/vssh/ssh.hJay Satiro
Follow-up to 5b2d703 which moved ssh source files to vssh. Closes https://github.com/curl/curl/pull/4609
2019-11-10pause: avoid updating socket if done was already calledDaniel Stenberg
... avoids unnecesary recursive risk when the transfer is already done. Reported-by: Richard Bowker Fixes #4563 Closes #4574
2019-10-30url: make Curl_close() NULLify the pointer tooDaniel Stenberg
This is the common pattern used in the code and by a unified approach we avoid mistakes. Closes #4534
2019-09-20easy: part of conditional expression is always true: !resultDaniel Stenberg
Fixes warning detected by PVS-Studio Fixes #4374
2019-09-03cleanup: move functions out of url.c and make them staticDaniel Stenberg
Closes #4289
2019-08-17vssh: move ssh init/cleanup functions into backend codeDaniel Stenberg
2019-08-06curl_multi_poll: a sister to curl_multi_wait() that waits moreDaniel Stenberg
Repeatedly we see problems where using curl_multi_wait() is difficult or just awkward because if it has no file descriptor to wait for internally, it returns immediately and leaves it to the caller to wait for a small amount of time in order to avoid occasional busy-looping. This is often missed or misunderstood, leading to underperforming applications. This change introduces curl_multi_poll() as a replacement drop-in function that accepts the exact same set of arguments. This function works identically to curl_multi_wait() - EXCEPT - for the case when there's nothing to wait for internally, as then this function will by itself wait for a "suitable" short time before it returns. This effectiely avoids all risks of busy-looping and should also make it less likely that apps "over-wait". This also changes the curl tool to use this funtion internally when doing parallel transfers and changes curl_easy_perform() to use it internally. Closes #4163
2019-07-25easy: resize receive buffer on easy handle resetJay Satiro
- In curl_easy_reset attempt to resize the receive buffer to its default size. If realloc fails then continue using the previous size. Prior to this change curl_easy_reset did not properly handle resetting the receive buffer (data->state.buffer). It reset the variable holding its size (data->set.buffer_size) to the default size (READBUFFER_SIZE) but then did not actually resize the buffer. If a user resized the buffer by using CURLOPT_BUFFERSIZE to set the size smaller than the default, later called curl_easy_reset and attempted to reuse the handle then a heap overflow would very likely occur during that handle's next transfer. Reported-by: Felix Hädicke Fixes https://github.com/curl/curl/issues/4143 Closes https://github.com/curl/curl/pull/4145
2019-06-09unpause: trigger a timeout for event-based transfersDaniel Stenberg
... so that timeouts or other state machine actions get going again after a changing pause state. For example, if the last delivery was paused there's no pending socket activity. Reported-by: sstruchtrup on github Fixes #3994 Closes #4001
2019-05-16cleanup: remove FIXME and TODO commentsDaniel Stenberg
They serve very little purpose and mostly just add noise. Most of them have been around for a very long time. I read them all before removing or rephrasing them. Ref: #3876 Closes #3883
2019-05-12auth: Rename the various authentication clean up functionsSteve Holme
For consistency and to a avoid confusion. Closes #3869
2019-05-12easy: fix another "clarify calculation precedence" warningMarcel Raad
I missed this one in commit 6b3dde7fe62ea5a557fd1fd323fac2bcd0c2e9be.
2019-05-12build: fix "clarify calculation precedence" warningsMarcel Raad
Codacy/CppCheck warns about this. Consistently use parentheses as we already do in some places to silence the warning. Closes https://github.com/curl/curl/pull/3866
2019-05-11http_digest: Don't expose functions when HTTP and Crypto Auth are disabledSteve Holme
Closes #3861
2019-04-11CURLOPT_DNS_USE_GLOBAL_CACHE: removeDaniel Stenberg
Remove the code too. The functionality has been disabled in code since 7.62.0. Setting this option will from now on simply be ignored and have no function. Closes #3654
2019-03-02system_win32: move win32_init here from easy.cJay Satiro
.. since system_win32 is a more appropriate location for the functions and to extern the globals. Ref: https://github.com/curl/curl/commit/ca597ad#r32446578 Reported-by: Gisle Vanem Closes https://github.com/curl/curl/pull/3625
2019-02-22Fix strict-prototypes GCC warningMarcel Raad
As seen in the MinGW autobuilds. Caused by commit f26bc29cfec0be84c67cf74065cf8e5e78fd68b7.
2019-02-18easy: fix win32 init to work without CURL_GLOBAL_WIN32Jay Satiro
- Change the behavior of win32_init so that the required initialization procedures are not affected by CURL_GLOBAL_WIN32 flag. libcurl via curl_global_init supports initializing for win32 with an optional flag CURL_GLOBAL_WIN32, which if omitted was meant to stop Winsock initialization. It did so internally by skipping win32_init() when that flag was set. Since then win32_init() has been expanded to include required initialization routines that are separate from Winsock and therefore must be called in all cases. This commit fixes it so that CURL_GLOBAL_WIN32 only controls the optional win32 initialization (which is Winsock initialization, according to our doc). The only users affected by this change are those that don't pass CURL_GLOBAL_WIN32 to curl_global_init. For them this commit removes the risk of a potential crash. Ref: https://github.com/curl/curl/pull/3573 Fixes https://github.com/curl/curl/issues/3313 Closes https://github.com/curl/curl/pull/3575
2019-02-15Curl_now: figure out windows version in win32_initDaniel Stenberg
... and avoid use of static variables that aren't thread safe. Fixes regression from e9ababd4f5a (present in the 7.64.0 release) Reported-by: Paul Groke Fixes #3572 Closes #3573
2019-01-11urldata: rename easy_conn to just connDaniel Stenberg
We use "conn" everywhere to be a pointer to the connection. Introduces two functions that "attaches" and "detaches" the connection to and from the transfer. Going forward, we should favour using "data->conn" (since a transfer always only has a single connection or none at all) to "conn->data" (since a connection can have none, one or many transfers associated with it and updating conn->data to be correct is error prone and a frequent reason for internal issues). Closes #3442
2018-11-25curl_easy_perform: fix timeout handlingDaniel Stenberg
curl_multi_wait() was erroneously used from within curl_easy_perform(). It could lead to it believing there was no socket to wait for and then instead sleep for a while instead of monitoring the socket and then miss acting on that activity as swiftly as it should (causing an up to 1000 ms delay). Reported-by: Antoni Villalonga Fixes #3305 Closes #3306 Closes #3308
2018-11-20ares: remove fd from multi fd set when ares is about to close the fdRomain Fliedel
When using c-ares for asyn dns, the dns socket fd was silently closed by c-ares without curl being aware. curl would then 'realize' the fd has been removed at next call of Curl_resolver_getsock, and only then notify the CURLMOPT_SOCKETFUNCTION to remove fd from its poll set with CURL_POLL_REMOVE. At this point the fd is already closed. By using ares socket state callback (ARES_OPT_SOCK_STATE_CB), this patch allows curl to be notified that the fd is not longer needed for neither for write nor read. At this point by calling Curl_multi_closed we are able to notify multi with CURL_POLL_REMOVE before the fd is actually closed by ares. In asyn-ares.c Curl_resolver_duphandle we can't use ares_dup anymore since it does not allow passing a different sock_state_cb_data Closes #3238
2018-09-23whitespace fixesViktor Szakats
- replace tabs with spaces where possible - remove line ending spaces - remove double/triple newlines at EOF - fix a non-UTF-8 character - cleanup a few indentations/line continuations in manual examples Closes https://github.com/curl/curl/pull/3037
2018-09-22url: use the URL API internally as wellDaniel Stenberg
... to make it a truly unified URL parser. Closes #3017
2018-09-07curl_easy_upkeep: removed 'conn' from the nameDaniel Stenberg
... including the associated option. Fixes #2951 Closes #2952
2018-09-07upkeep: add a connection upkeep API: curl_easy_conn_upkeep()Max Dymond
Add functionality so that protocols can do custom keepalive on their connections, when an external API function is called. Add docs for the new options in 7.62.0 Closes #1641
2018-08-18vtls: reinstantiate engine on duplicated handlesLaurent Bonnans
Handles created with curl_easy_duphandle do not use the SSL engine set up in the original handle. This fixes the issue by storing the engine name in the internal url state and setting the engine from its name inside curl_easy_duphandle. Reported-by: Anton Gerasimov Signed-of-by: Laurent Bonnans Fixes #2829 Closes #2833
2018-06-27easy_perform: use *multi_timeout() to get wait timesDaniel Stenberg
... and trim the threaded Curl_resolver_getsock() to return zero millisecond wait times during the first three milliseconds so that localhost or names in the OS resolver cache gets detected and used faster. Closes #2685
2018-06-03spelling fixesViktor Szakats
Detected using the `codespell` tool (version 1.13.0). Also secure and fix an URL.
2018-04-12duphandle: make sure CURLOPT_RESOLVE is duplicated fine tooDaniel Stenberg
Verified in test 1502 now Fixes #2485 Closes #2486 Reported-by: Ernst Sjöstrand
2018-03-17add_handle/easy_perform: clear errorbuffer on start if setDaniel Stenberg
To offer applications a more defined behavior, we clear the buffer as early as possible. Assisted-by: Jay Satiro Fixes #2190 Closes #2377
2018-03-16pause: when changing pause state, update socket stateDaniel Stenberg
Especially unpausing a transfer might have to move the socket back to the "currently used sockets" hash to get monitored. Otherwise it would never get any more data and get stuck. Easily triggered with pausing using the multi_socket API. Reported-by: Philip Prindeville Bug: https://curl.haxx.se/mail/lib-2018-03/0048.html Fixes #2393 Closes #2391
2018-02-16header callback: don't chop headers into smaller piecesDaniel Stenberg
Reported-by: Guido Berhoerster Fixes #2314 Closes #2316
2018-02-15TODO fixed: Detect when called from within callbacksBjörn Stenberg
Closes #2302
2018-01-30curl_easy_reset: clear digest auth stateDaniel Stenberg
Bug: https://curl.haxx.se/mail/lib-2018-01/0074.html Reported-by: Ruurd Beerstra Fixes #2255 Closes #2272
2018-01-14mime: clone mime tree upon easy handle duplication.Patrick Monnerat
A mime tree attached to an easy handle using CURLOPT_MIMEPOST is strongly bound to the handle: there is a pointer to the easy handle in each item of the mime tree and following the parent pointer list of mime items ends in a dummy part stored within the handle. Because of this binding, a mime tree cannot be shared between different easy handles, thus it needs to be cloned upon easy handle duplication. There is no way for the caller to get the duplicated mime tree handle: it is then set to be automatically destroyed upon freeing the new easy handle. New test 654 checks proper mime structure duplication/release. Add a warning note in curl_mime_data_cb() documentation about sharing user data between duplicated handles. Closes #2235
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