aboutsummaryrefslogtreecommitdiff
path: root/lib/multi.c
AgeCommit message (Collapse)Author
2011-03-14protocol handler: added flags fieldDaniel Stenberg
The protocol handler struct got a 'flags' field for special information and characteristics of the given protocol. This now enables us to move away central protocol information such as CLOSEACTION and DUALCHANNEL from single defines in a central place, out to each protocol's definition. It also made us stop abusing the protocol field for other info than the protocol, and we could start cleaning up other protocol-specific things by adding flags bits to set in the handler struct. The "protocol" field connectdata struct was removed as well and the code now refers directly to the conn->handler->protocol field instead. To make things work properly, the code now always store a conn->given pointer that points out the original handler struct so that the code can learn details from the original protocol even if conn->handler is modified along the way - for example when switching to go over a HTTP proxy.
2011-03-13SSH: add protocol lock directionDaniel Stenberg
Some protocols have to call the underlying functions without regard to what exact state the socket signals. For example even if the socket says "readable", the send function might need to be called while uploading, or vice versa. This is the case for libssh2 based protocols: SCP and SFTP and we now introduce a define to set those protocols and we make the multi interface code aware of this concept. This is another fix to make test 582 run properly.
2011-02-18multi: close connection on timeoutMike Crowe
After a request times out, the connection wasn't properly closed and prevented to get re-used, so subsequent transfers could still mistakenly get to use the previously aborted connection.
2011-02-18multi: better failed connect treatmentDaniel Stenberg
When failing to connect the protocol during the CURLM_STATE_PROTOCONNECT state, Curl_done() has to be called with the premature flag set TRUE as for the pingpong protocols this can be important. When Curl_done() is called with premature == TRUE, it needs to call Curl_disconnect() with its 'dead_connection' argument set to TRUE as well so that any protocol handler's disconnect function won't attempt to use the (control) connection for anything. This problem caused the pingpong protocols to fail to disconnect when STARTTLS failed. Reported by: Alona Rossen Bug: http://curl.haxx.se/mail/lib-2011-02/0195.html
2011-02-02multi: fix CURLM_STATE_TOOFAST for multi_socketNicholas Maniscalco
The code in the toofast state needs to first recalculate the values before it uses them again since it may have been a while since it last did it when it reaches this point.
2011-01-04Curl_timeleft: s/conn/data in first argumentDaniel Stenberg
As the function doesn't really use the connectdata struct but only the SessionHanadle struct I modified what argument it wants.
2010-12-22multi: inhibit some verbose outputsDaniel Stenberg
The info about pipe status and expire cleared are clearly debug-related and not anything mere mortals will or should care about so they are now ifdef'ed DEBUGBUILD
2010-12-13multi_runsingle: don't timeout completed handlesDaniel Stenberg
The generic timeout code must not check easy handles that are already completed. Going to completed (again) within there risked decreasing the number of alive handles again and thus it could go negative. This regression bug was added in 7.21.2 in commit ca10e28f06f1
2010-12-06url: provide dead_connection flag in Curl_handler::disconnectKamil Dudka
It helps to prevent a hangup with some FTP servers in case idle session timeout has exceeded. But it may be useful also for other protocols that send any quit message on disconnect. Currently used by FTP, POP3, IMAP and SMTP.
2010-11-28multi: fix compiler warning: conversion may lose significant bits follow-upYang Tse
2010-11-26multi: fix compiler warning: conversion may lose significant bitsYang Tse
2010-11-26multi: fix compiler warning: enumerated type mixed with another typeYang Tse
2010-11-25curl_multi_info_read: fix compiler warning: conversion may lose significant bitsYang Tse
2010-09-28multi: don't expire timeouts at disonnect or doneDaniel Stenberg
The functions Curl_disconnect() and Curl_done() are both used within the scope of a single request so they cannot be allowed to use Curl_expire(... 0) to kill all timeouts as there are some timeouts that are set before a request that are supposed to remain until the request is done. The timeouts are now instead cleared at curl_easy_cleanup() and when the multi state machine changes a handle to the complete state.
2010-09-27multi_runsingle: set timeout error messagesDirk Manske
With the latest changes to fix the timeout handling with multi interface we lost the timeout error messages. This patch brings them back.
2010-09-01multi: fixes for timing out handlesDaniel Stenberg
Add a timeout check for handles in the state machine so that they will timeout in all states disregarding what actions that may or may not happen. Fixed a bug in socket_action introduced recently when looping over timed out handles: it wouldn't assign the 'data' variable and thus it wouldn't properly take care of handles. In the update_timer function, the code now checks if the timeout has been removed and then it tells the application. Previously it would always let the remaining timeout(s) just linger to expire later on.
2010-08-31multi: make sure the next timeout is used when one expiresDaniel Stenberg
Each easy handle has a list of timeouts, so as soon as the main timeout for a handle expires, we must make sure to get the next entry from the list and re-add the handle to the splay tree. This was attempted previously but was done poorly in my commit 232ad6549a68450.
2010-08-24multi: Fix compile warning on 64-bit systemsBen Greear
2010-08-18Fixed a memory leak during OOM in the multi timeout codeDan Fandrich
2010-08-18multi: avoid sending multiple complete messagesDaniel Stenberg
I fell over this bug report that mentioned that libcurl could wrongly send more than one complete messages at the end of a transfer. Reading the code confirmed this, so I've added a new multi state to make it not happen. The mentioned bug report was made by Brad Jorsch but is (oddly enough) filed in Debian's bug tracker for the "wmweather+" tool. Bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=593390
2010-08-15multi: use timeouts properly for MAX_RECV/SEND_SPEEDDaniel Stenberg
When detecting that the send or recv speed, the multi interface changes state to TOOFAST and previously there was no timeout set that would force a recheck but it would rely on the application to somehow call libcurl anyway. This now sets a timeout for a suitable future time to check again if the average transfer speed is then below the threshold again.
2010-08-15multi: support timeoutsDaniel Stenberg
Curl_expire() is now expanded to hold a list of timeouts for each easy handle. Only the closest in time will be the one used as the primary timeout for the handle and will be used for the splay tree (which sorts and lists all handles within the multi handle). When the main timeout has triggered/expired, the next timeout in time that is kept in the list will be moved to the main timeout position and used as the key to splay with. This way, all timeouts that are set with Curl_expire() internally will end up as a proper timeout. Previously any Curl_expire() that set a _later_ timeout than what was already set was just silently ignored and thus missed. Setting Curl_expire() with timeout 0 (zero) will cancel all previously added timeouts. Corrects known bug #62.
2010-08-15multi: make curl_multi_info_read perform O(1)Daniel Stenberg
Instead of looping over all attached easy handles, this now keeps a list of messages in the multi handle. It allows curl_multi_info_read() to perform O(1) no matter how many easy handles that are handled. This is of importance since this function may be polled very frequently by apps using the multi interface.
2010-08-08typo: remove duplicate semicolonDaniel Stenberg
2010-08-08multi: avoid a malloc() when a transfer is completeDaniel Stenberg
The struct used for storing the message for a completed transfer is now no longer allocated separatly but is kept within the main struct kept for each easy handle so that we avoid one malloc (and the subsequent free).
2010-07-12multi: fix condition that remove timers before triggerConstantine Sapuntzakis
curl_multi perform has two phases: run through every easy handle calling multi_runsingle and remove expired timers (timer removal). If a small timer (e.g. 1-10ms) is set during multi_runsingle, then it's possible that the timer has passed by when the timer removal runs. The timer which was just added is then removed. This will potentially cause the timer list to be empty and cause the next call to curl_multi_timeout to return -1. Ideally, curl_multi_timeout should return 0 in this case. One way to fix this is to move the struct timeval now = Curl_tvnow(); to the top of curl_multi_perform. The change does that.
2010-07-01multi: CURLINFO_LASTSOCKET doesn't work after remove_handleDaniel Stenberg
When curl_multi_remove_handle() is called and an easy handle is returned to the connection cache held in the multi handle, then we cannot allow CURLINFO_LASTSOCKET to extract it since that will more or less encourage that the user uses the socket while it can get used by libcurl again. Without this fix, we'd get a segfault in Curl_getconnectinfo() trying to dereference the NULL pointer in 'data->state.connc'. Bug: http://curl.haxx.se/bug/view.cgi?id=3023840
2010-06-18multi: prevent NULL pointer dereferenceDaniel Stenberg
My additional call to Curl_pgrsUpdate() would sometimes get called even though there's no connection (left) so a NULL pointer would get passed, causing a segfault.
2010-06-17multi: unmark handle as used when no longer head of pipelineKrister Johansen
2010-06-17multi: call the progress function only once and allow abortDaniel Stenberg
1) no need to call the progress function twice when in the CURLM_STATE_TOOFAST state. 2) Make sure that the progress callback's return code is acknowledged when used
2010-06-17multi: call the progress callback in all statesDaniel Stenberg
As long as no error is reported, the progress function can get called. This may be a little TOO often so we should keep an eye on this and possibly make this conditional somehow.
2010-06-02lib: eliminate some dead codeKamil Dudka
2010-06-01multi_socket: handles timer inaccuracy better for timeoutsDaniel Stenberg
Igor Novoseltsev reported a problem with the multi socket API and using timeouts and timers. It boiled down to a problem with libcurl's use of GetTickCount() interally to figure out the current time, while Igor's own application code used another function call. It made his app call the socket API timeout function a bit _before_ libcurl would consider the timeout to trigger, and that could easily lead to timeouts or stalls in the app. It seems GetTickCount() in general often has no better resolution than 16ms and switching to the alternative function QueryPerformanceCounter has its share of problems: http://www.virtualdub.org/blog/pivot/entry.php?id=106 We address this problem by simply having libcurl treat timers that already has occured or will occur within 40ms subject for treatment. I'm confident that there are other implementations and operating systems with similarly in accurate timer functions so it makes sense to have applied generically and I don't believe we sacrifice much by adding a 40ms inaccuracy on these timeouts.
2010-05-16lib: Change some CRLF line endings to LFTor Arntsen
An update had added a couple of lines with DOS line endings, and some compilers will choke on that (e.g. the Tru64 compiler).
2010-05-12FTP: WILDCARDMATCH/CHUNKING/FNMATCH addedPavel Raiskup
2010-03-24remove the CVSish $Id$ linesDaniel Stenberg
2010-03-23delayed easy handle kill caused double Curl_close() callDaniel Stenberg
Hauke Duden provided an example program that made the multi interface crash. His example simply used the multi interface and did first one FTP transfer and after completion it used a second easy handle and did another FTP transfer on the same FTP server. This triggered a bug in the "delayed easy handle kill" system that curl uses: when an FTP connection is left alive it must keep an easy handle around internally - only for the purpose of having an easy handle when it later disconnects it. The code assumed that when the easy handle was removed and an internal reference was made, that version could be killed later on when a new easy handle came using the same connection. This was wrong as Hauke's example showed that the removed handle wasn't killed for real until later. This caused a double close attempt => segfault.
2010-03-15- Constantine Sapuntzakis brought a patch:Daniel Stenberg
The problem mentioned on Dec 10 2009 (http://curl.haxx.se/bug/view.cgi?id=2905220) was only partially fixed. Partially because an easy handle can be associated with many connections in the cache (e.g. if there is a redirect during the lifetime of the easy handle). The previous patch only cleaned up the first one. The new fix now removes the easy handle from all connections, not just the first one.
2010-02-04fix printf-style format stringsYang Tse
2010-02-02Fix compiler warnings: conversion from 'const int ' to 'unsigned char ', ↵Yang Tse
possible loss of data
2010-02-01We introduce a loop in lib/multi.c around all calls to multi_runsingle() andDaniel Stenberg
simply check for CURLM_CALL_MULTI_PERFORM internally. This has the added benefit that this goes in line with my long-term wishes to get rid of the CURLM_CALL_MULTI_PERFORM all together from the public API.
2010-01-28fix printf-style format stringsYang Tse
2010-01-11After the TCP connect is confirmed in CURLM_STATE_WAITCONNECT and it changesDaniel Stenberg
state, we return CURLM_CALL_MULTI_PERFORM unconditionally then so that we can act faster like in the case the protocol-specific connect doesn't block on anything and we can just persue on the next action immediately. It also then avoids a case where curl_multi_fdset() would return -1.
2010-01-09struct Curl_sh_entry's 'inuse' member was no longer used and is now removedDaniel Stenberg
2010-01-03- Julien Chaffraix eliminated a duplicated initialization in singlesocket().Kamil Dudka
2009-12-10- Constantine Sapuntzakis figured out a case which would lead to libcurlDaniel Stenberg
accessing alredy freed memory and thus crash when using HTTPS (with OpenSSL), multi interface and the CURLOPT_DEBUGFUNCTION and a certain order of cleaning things up. I fixed it. (http://curl.haxx.se/bug/view.cgi?id=2891591)
2009-11-18Make usage of calloc()'s arguments consistent with rest of code baseYang Tse
2009-08-24clarify the code by initing newurl to NULLDaniel Stenberg
2009-08-21- Andre Guibert de Bruet pointed out a missing return code check for aDaniel Stenberg
strdup() that could lead to segfault if it returned NULL. I extended his suggest patch to now have Curl_retry_request() return a regular return code and better check that.
2009-08-21- Lots of good work by Krister Johansen, mostly related to pipelining:Daniel Stenberg
Fix SIGSEGV on free'd easy_conn when pipe unexpectedly breaks Fix data corruption issue with re-connected transfers Fix use after free if we're completed but easy_conn not NULL