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2019-12-09conn: always set bits.close with connclose()Daniel Stenberg
Closes #4690
2019-12-09conncache: fix multi-thread use of shared connection cacheDaniel Stenberg
It could accidentally let the connection get used by more than one thread, leading to double-free and more. Reported-by: Christopher Reid Fixes #4544 Closes #4557
2019-11-25multi: add curl_multi_wakeup()Gergely Nagy
This commit adds curl_multi_wakeup() which was previously in the TODO list under the curl_multi_unblock name. On some platforms and with some configurations this feature might not be available or can fail, in these cases a new error code (CURLM_WAKEUP_FAILURE) is returned from curl_multi_wakeup(). Fixes #4418 Closes #4608
2019-11-17multi: Fix curl_multi_poll wait when extra_fds && !extra_nfdsGergely Nagy
Prior to this change: The check if an extra wait is necessary was based not on the number of extra fds but on the pointer. If a non-null pointer was given in extra_fds, but extra_nfds was zero, then the wait was skipped even though poll was not called. Closes https://github.com/curl/curl/pull/4610
2019-11-14multi_poll: avoid busy-loop when called without easy handles attachedDaniel Stenberg
Fixes #4594 Closes #4595 Reported-by: 3dyd on github
2019-11-11remove_handle: clear expire timers after multi_done()Daniel Stenberg
Since 59041f0, a new timer might be set in multi_done() so the clearing of the timers need to happen afterwards! Reported-by: Max Kellermann Fixes #4575 Closes #4583
2019-10-02CURLMOPT_MAX_CONCURRENT_STREAMS: new setoptKunal Ekawde
Closes #4410
2019-09-20multi: value '2L' is assigned to a booleanDaniel 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
2019-08-14multi: getsock improvements for QUIC connectingDaniel 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
2019-08-01timediff: make it 64 bit (if possible) even with 32 bit time_tDaniel Stenberg
... to make it hold microseconds too. Fixes #4165 Closes #4168
2019-07-30cleanup: remove the 'numsocks' argument used in many placesDaniel Stenberg
It was used (intended) to pass in the size of the 'socks' array that is also passed to these functions, but was rarely actually checked/used and the array is defined to a fixed size of MAX_SOCKSPEREASYHANDLE entries that should be used instead. Closes #4169
2019-07-30asyn-thread: create a socketpair to wait onamkatyal
Closes #4157
2019-07-25multi: call detach_connection before Curl_disconnectGergely Nagy
Curl_disconnect bails out if conn->easyq is not empty, detach_connection needs to be called first to remove the current easy from the queue. Fixes #4144 Closes #4151
2019-06-23multi: enable multiplexing by default (again)Daniel Stenberg
It was originally made default in d7c4213bd0c (7.62.0) but mistakenly reverted in commit 2f44e94efb3d (7.65.0). Now enabled again. Closes #4051
2019-06-14multi: fix the transfer hash functionDaniel Stenberg
Follow-up from 8b987cc7eb Reported-by: Tom van der Woerdt Fixes #4018 Closes #4024
2019-06-12multi: fix the transfer hashes in the socket hash entriesDaniel Stenberg
- The transfer hashes weren't using the correct keys so removing entries failed. - Simplified the iteration logic over transfers sharing the same socket and they now simply are set to expire and thus get handled in the "regular" timer loop instead. Reported-by: Tom van der Woerdt Fixes #4012 Closes #4014
2019-06-10multi: make sure 'data' can present in several sockhash entriesDaniel Stenberg
Since more than one socket can be used by each transfer at a given time, each sockhash entry how has its own hash table with transfers using that socket. In addition, the sockhash entry can now be marked 'blocked = TRUE'" which then makes the delete function just set 'removed = TRUE' instead of removing it "for real", as a way to not rip out the carpet under the feet of a parent function that iterates over the transfers of that same sockhash entry. Reported-by: Tom van der Woerdt Fixes #3961 Fixes #3986 Fixes #3995 Fixes #4004 Closes #3997
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
2019-06-01singlesocket: use separate variable for inner loopDaniel Stenberg
An inner loop within the singlesocket() function wrongly re-used the variable for the outer loop which then could cause an infinite loop. Change to using a separate variable! Reported-by: Eric Wu Fixes #3970 Closes #3973
2019-05-28multi: track users of a socket betterDaniel Stenberg
They need to be removed from the socket hash linked list with more care. When sh_delentry() is called to remove a sockethash entry, remove all individual transfers from the list first. To enable this, each Curl_easy struct now stores a pointer to the sockethash entry to know how to remove itself. Reported-by: Tom van der Woerdt and Kunal Ekawde Fixes #3952 Fixes #3904 Closes #3953
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
2019-05-15http_negotiate: Move the Negotiate state out of the negotiatedata structureSteve Holme
Given that this member variable is not used by the SASL based protocols there is no need to have it here. Closes #3882
2019-05-15http_ntlm: Move the NTLM state out of the ntlmdata structureSteve Holme
Given that this member variable is not used by the SASL based protocols there is no need to have it here.
2019-05-13wildcard: disable from build when FTP isn't presentDaniel Stenberg
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
2019-05-10Revert "multi: support verbose conncache closure handle"Jay Satiro
This reverts commit b0972bc. - No longer show verbose output for the conncache closure handle. The offending commit was added so that the conncache closure handle would inherit verbose mode from the user's easy handle. (Note there is no way for the user to set options for the closure handle which is why that was necessary.) Other debug settings such as the debug function were not also inherited since we determined that could lead to crashes if the user's per-handle private data was used on an unexpected handle. The reporter here says he has a debug function to capture the verbose output, and does not expect or want any output to stderr; however because the conncache closure handle does not inherit the debug function the verbose output for that handle does go to stderr. There are other plausible scenarios as well such as the user redirects stderr on their handle, which is also not inherited since it could lead to crashes when used on an unexpected handle. Short of allowing the user to set options for the conncache closure handle I don't think there's much we can safely do except no longer inherit the verbose setting. Bug: https://curl.haxx.se/mail/lib-2019-05/0021.html Reported-by: Kristoffer Gleditsch Ref: https://github.com/curl/curl/pull/3598 Ref: https://github.com/curl/curl/pull/3618 Closes https://github.com/curl/curl/pull/3856
2019-05-01multi: provide Curl_multiuse_state to update informationDaniel Stenberg
As soon as a TLS backend gets ALPN conformation about the specific HTTP version it can now set the multiplex situation for the "bundle" and trigger moving potentially queued up transfers to the CONNECT state.
2019-05-01process_pending_handles: mark queued transfers as previously pendingDaniel Stenberg
With transfers being queued up, we only move one at a a time back to the CONNECT state but now we mark moved transfers so that when a moved transfer is confirmed "successful" (it connected) it will trigger the move of another pending transfer. Previously, it would otherwise wait until the transfer was done before doing this. This makes queued up pending transfers get processed (much) faster.
2019-04-19multi: fix the statenames (follow-up fix from 2f44e94efb3df8e)Daniel Stenberg
The list of names must be in sync with the defined states in the header file!
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
2019-04-07multi_runsingle(): fix use-after-freeEven Rouault
Fixes #3745 Closes #3746 The following snippet ``` int main() { CURL* hCurlHandle = curl_easy_init(); curl_easy_setopt(hCurlHandle, CURLOPT_URL, "http://example.com"); curl_easy_setopt(hCurlHandle, CURLOPT_PROXY, "1"); curl_easy_perform(hCurlHandle); curl_easy_cleanup(hCurlHandle); return 0; } ``` triggers the following Valgrind warning ``` ==4125== Invalid read of size 8 ==4125== at 0x4E7D1EE: Curl_llist_remove (llist.c:97) ==4125== by 0x4E7EF5C: detach_connnection (multi.c:798) ==4125== by 0x4E80545: multi_runsingle (multi.c:1451) ==4125== by 0x4E8197C: curl_multi_perform (multi.c:2072) ==4125== by 0x4E766A0: easy_transfer (easy.c:625) ==4125== by 0x4E76915: easy_perform (easy.c:719) ==4125== by 0x4E7697C: curl_easy_perform (easy.c:738) ==4125== by 0x4008BE: main (in /home/even/curl/test) ==4125== Address 0x9b3d1d0 is 1,120 bytes inside a block of size 1,600 free'd ==4125== at 0x4C2ECF0: free (vg_replace_malloc.c:530) ==4125== by 0x4E62C36: conn_free (url.c:756) ==4125== by 0x4E62D34: Curl_disconnect (url.c:818) ==4125== by 0x4E48DF9: Curl_once_resolved (hostip.c:1097) ==4125== by 0x4E8052D: multi_runsingle (multi.c:1446) ==4125== by 0x4E8197C: curl_multi_perform (multi.c:2072) ==4125== by 0x4E766A0: easy_transfer (easy.c:625) ==4125== by 0x4E76915: easy_perform (easy.c:719) ==4125== by 0x4E7697C: curl_easy_perform (easy.c:738) ==4125== by 0x4008BE: main (in /home/even/curl/test) ==4125== Block was alloc'd at ==4125== at 0x4C2F988: calloc (vg_replace_malloc.c:711) ==4125== by 0x4E6438E: allocate_conn (url.c:1654) ==4125== by 0x4E685B4: create_conn (url.c:3496) ==4125== by 0x4E6968F: Curl_connect (url.c:4023) ==4125== by 0x4E802E7: multi_runsingle (multi.c:1368) ==4125== by 0x4E8197C: curl_multi_perform (multi.c:2072) ==4125== by 0x4E766A0: easy_transfer (easy.c:625) ==4125== by 0x4E76915: easy_perform (easy.c:719) ==4125== by 0x4E7697C: curl_easy_perform (easy.c:738) ==4125== by 0x4008BE: main (in /home/even/curl/test) ``` This has been bisected to commit 2f44e94 Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14109 Credit to OSS Fuzz
2019-04-06pipelining: removedDaniel Stenberg
As previously planned and documented in DEPRECATE.md, all pipelining code is removed. Closes #3651
2019-03-27multi: improved HTTP_1_1_REQUIRED handlingDaniel Stenberg
Make sure to downgrade to 1.1 even when we get this HTTP/2 stream error on first flight. Reported-by: niner on github Fixes #3696 Closes #3707
2019-03-14Negotiate: fix for HTTP POST with NegotiateDominik Hölzl
* Adjusted unit tests 2056, 2057 * do not generally close connections with CURLAUTH_NEGOTIATE after every request * moved negotiatedata from UrlState to connectdata * Added stream rewind logic for CURLAUTH_NEGOTIATE * introduced negotiatedata::GSS_AUTHDONE and negotiatedata::GSS_AUTHSUCC * Consider authproblem state for CURLAUTH_NEGOTIATE * Consider reuse_forbid for CURLAUTH_NEGOTIATE * moved and adjusted negotiate authentication state handling from output_auth_headers into Curl_output_negotiate * Curl_output_negotiate: ensure auth done is always set * Curl_output_negotiate: Set auth done also if result code is GSS_S_CONTINUE_NEEDED/SEC_I_CONTINUE_NEEDED as this result code may also indicate the last challenge request (only works with disabled Expect: 100-continue and CURLOPT_KEEP_SENDING_ON_ERROR -> 1) * Consider "Persistent-Auth" header, detect if not present; Reset/Cleanup negotiate after authentication if no persistent authentication * apply changes introduced with #2546 for negotiate rewind logic Fixes #1261 Closes #1975
2019-03-11multi: removed unused code for request retriesDaniel Stenberg
This code was once used for the non multi-interface using code path, but ever since easy_perform was turned into a wrapper around the multi interface, this code path never runs. Closes #3666
2019-03-05multi: support verbose conncache closure handleJay Satiro
- Change closure handle to receive verbose setting from the easy handle most recently added via curl_multi_add_handle. The closure handle is a special easy handle used for closing cached connections. It receives limited settings from the easy handle most recently added to the multi handle. Prior to this change that did not include verbose which was a problem because on connection shutdown verbose mode was not acknowledged. Ref: https://github.com/curl/curl/pull/3598 Co-authored-by: Daniel Stenberg Closes https://github.com/curl/curl/pull/3618
2019-02-28Curl_easy: remove req.maxfd - never used!Daniel Stenberg
Introduced in 8b6314ccfb, but not used anymore in current code. Unclear since when. Closes #3626
2019-02-24multi: call multi_done on connect timeoutsDaniel Stenberg
Failing to do so would make the CURLINFO_TOTAL_TIME timeout to not get updated correctly and could end up getting reported to the application completely wrong (way too small). Reported-by: accountantM on github Fixes #3602 Closes #3605
2019-02-20singlesocket: fix the 'sincebefore' placementDaniel Stenberg
The variable wasn't properly reset within the loop and thus could remain set for sockets that hadn't been set before and miss notifying the app. This is a follow-up to 4c35574 (shipped in curl 7.64.0) Reported-by: buzo-ffm on github Detected-by: Jan Alexander Steffens Fixes #3585 Closes #3589
2019-02-13multi: Dereference of null pointerDaniel Stenberg
Mostly a false positive, but this makes the code easier to read anyway. Detected by scan-build. Closes #3563
2019-02-12http2: multi_connchanged() moved from multi.c, only used for h2Daniel Stenberg
Closes #3557
2019-02-12multi: remove verbose "Expire in" ... messagesDaniel Stenberg
Reported-by: James Brown Bug: https://curl.haxx.se/mail/archive-2019-02/0013.html Closes #3558
2019-02-11multi: (void)-prefix when ignoring return valuesDaniel Stenberg
... and added braces to two function calls which fixes warnings if they are replace by empty macros at build-time.
2019-02-10cleanup: make local functions staticDaniel Stenberg
urlapi: turn three local-only functions into statics conncache: make conncache_find_first_connection static multi: make detach_connnection static connect: make getaddressinfo static curl_ntlm_core: make hmac_md5 static http2: make two functions static http: make http_setup_conn static connect: make tcpnodelay static tests: make UNITTEST a thing to mark functions with, so they can be static for normal builds and non-static for unit test builds ... and mark Curl_shuffle_addr accordingly. url: make up_free static setopt: make vsetopt static curl_endian: make write32_le static rtsp: make rtsp_connisdead static warnless: remove unused functions memdebug: remove one unused function, made another static
2019-02-01multi: set the EXPIRE_*TIMEOUT timers at TIMER_STARTSINGLE timeDaniel Stenberg
To make sure Curl_timeleft() also thinks the timeout has been reached when one of the EXPIRE_*TIMEOUTs expires. Bug: https://curl.haxx.se/mail/lib-2019-01/0073.html Reported-by: Zhao Yisha Closes #3501
2019-01-15multi: remove "Dead assignment"Daniel Stenberg
Found by scan-build. Follow-up to 4c35574bb785ce. Closes #3471
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
2019-01-10multi: multiplexing improvementsDaniel Stenberg
Fixes #3436 Closes #3448 Problem 1 After LOTS of scratching my head, I eventually realized that even when doing 10 uploads in parallel, sometimes the socket callback to the application that tells it what to wait for on the socket, looked like it would reflect the status of just the single transfer that just changed state. Digging into the code revealed that this was indeed the truth. When multiple transfers are using the same connection, the application did not correctly get the *combined* flags for all transfers which then could make it switch to READ (only) when in fact most transfers wanted to get told when the socket was WRITEABLE. Problem 1b A separate but related regression had also been introduced by me when I cleared connection/transfer association better a while ago, as now the logic couldn't find the connection and see if that was marked as used by more transfers and then it would also prematurely remove the socket from the socket hash table even in times other transfers were still using it! Fix 1 Make sure that each socket stored in the socket hash has a "combined" action field of what to ask the application to wait for, that is potentially the ORed action of multiple parallel transfers. And remove that socket hash entry only if there are no transfers left using it. Problem 2 The socket hash entry stored an association to a single transfer using that socket - and when curl_multi_socket_action() was called to tell libcurl about activities on that specific socket only that transfer was "handled". This was WRONG, as a single socket/connection can be used by numerous parallel transfers and not necessarily a single one. Fix 2 We now store a list of handles in the socket hashtable entry and when libcurl is told there's traffic for a particular socket, it now iterates over all known transfers using that single socket.
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