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The motivation for having a separate struct that keep track of an easy
handle when using the multi handle was removed when we switched to
always using the multi interface internally. Now they were just two
separate struct that was always allocated for each easy handle.
This first step just moves the Curl_one_easy struct members into the
SessionHandle struct and hides this somehow (== keeps the source code
changes to a minimum) by defining Curl_one_easy to SessionHandle
The biggest changes in this commit are:
1 - the linked list of easy handles had to be changed somewhat due
to the new struct layout. This made the main linked list pointer
get renamed to 'easyp' and there's also a new pointer to the last
node, called easylp. It is no longer circular but ends with ->next
pointing to NULL. New nodes are still added last.
2 - easy->state is now called easy->mstate to avoid name collision
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Commit 6d30f8ebed34e7276 didn't work properly. First, it used the wrong
array index, but this fix also:
1 - only does the copying if indeed there was any activity
2 - makes sure to properly translate between internal and external
bitfields, which are not guaranteed to match
Reported-by: Evgeny Turnaev
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Pass back the revents that happened for the user-provided file
descriptors.
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As a remedy to the problem when a socket gets closed and a new one is
opened with the same file descriptor number and as a result
multi.c:singlesocket() doesn't detect the difference, the new function
Curl_multi_closed() gets told when a socket is closed so that it can be
removed from the socket hash. When the old one has been removed, a new
socket should be detected fine by the singlesocket() on next invoke.
Bug: http://curl.haxx.se/bug/view.cgi?id=1248
Reported-by: Erik Johansson
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Allow less room for "triggered too early" mistakes by applications /
timers on non-windows platforms. Starting now, we assume that a timeout
call is never made earlier than 3 milliseconds before the actual
timeout. This greatly improves timeout accuracy on Linux.
Bug: http://curl.haxx.se/bug/view.cgi?id=1228
Reported-by: Hang Su
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commit 29bf0598aad5 introduced a problem when the "internal" timeout is
prefered to the given if shorter, as it didn't consider the case where
-1 was returned. Now the internal timeout is only considered if not -1.
Reported-by: Tor Arntsen
Bug: http://curl.haxx.se/mail/lib-2013-06/0015.html
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If the multi handle's pending timeout is less than what is passed into
this function, it will now opt to use the shorter time anyway since it
is a very good hint that the handle wants to process something in a
shorter time than what otherwise would happen.
curl_multi_wait.3 was updated accordingly to clarify
This is the reason for bug #1224
Bug: http://curl.haxx.se/bug/view.cgi?id=1224
Reported-by: Andrii Moiseiev
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... because there's an identical check right next to it so using the
operators in the check in the same order increases readability.
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By introducing an internal alternative to curl_multi_init() that accepts
parameters to set the hash sizes, easy handles will now use tiny socket
and connection hash tables since it will only ever add a single easy
handle to that multi handle.
This decreased the number mallocs in test 40 (which is a rather simple
and typical easy interface use case) from 1142 to 138. The maximum
amount of memory allocated used went down from 118969 to 78805.
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Corrected some incorrectly positioned pointer variable declarations to
be "type *" rather than "type* ".
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warning: an enumerated type is mixed with another type
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warning: conversion from enumeration type to different enumeration type
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Introducing a number of options to the multi interface that
allows for multiple pipelines to the same host, in order to
optimize the balance between the penalty for opening new
connections and the potential pipelining latency.
Two new options for limiting the number of connections:
CURLMOPT_MAX_HOST_CONNECTIONS - Limits the number of running connections
to the same host. When adding a handle that exceeds this limit,
that handle will be put in a pending state until another handle is
finished, so we can reuse the connection.
CURLMOPT_MAX_TOTAL_CONNECTIONS - Limits the number of connections in total.
When adding a handle that exceeds this limit,
that handle will be put in a pending state until another handle is
finished. The free connection will then be reused, if possible, or
closed if the pending handle can't reuse it.
Several new options for pipelining:
CURLMOPT_MAX_PIPELINE_LENGTH - Limits the pipeling length. If a
pipeline is "full" when a connection is to be reused, a new connection
will be opened if the CURLMOPT_MAX_xxx_CONNECTIONS limits allow it.
If not, the handle will be put in a pending state until a connection is
ready (either free or a pipe got shorter).
CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE - A pipelined connection will not
be reused if it is currently processing a transfer with a content
length that is larger than this.
CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE - A pipelined connection will not
be reused if it is currently processing a chunk larger than this.
CURLMOPT_PIPELINING_SITE_BL - A blacklist of hosts that don't allow
pipelining.
CURLMOPT_PIPELINING_SERVER_BL - A blacklist of server types that don't allow
pipelining.
See the curl_multi_setopt() man page for details.
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... hopefully this will also make clang-analyzer stop warning on
potentional NULL dereferences (which were false positives anyway).
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When Curl_do() returns failure, the connection pointer could be NULL so
the code path following needs to that that into account.
Bug: http://curl.haxx.se/mail/lib-2013-03/0062.html
Reported by: Eric Hu
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Remove internal separated behavior of the easy vs multi intercace.
curl_easy_perform() is now using the multi interface itself.
Several minor multi interface quirks and bugs have been fixed in the
process.
Much help with debugging this has been provided by: Yang Tse
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This commit renames lib/setup.h to lib/curl_setup.h and
renames lib/setup_once.h to lib/curl_setup_once.h.
Removes the need and usage of a header inclusion guard foreign
to libcurl. [1]
Removes the need and presence of an alarming notice we carried
in old setup_once.h [2]
----------------------------------------
1 - lib/setup_once.h used __SETUP_ONCE_H macro as header inclusion guard
up to commit ec691ca3 which changed this to HEADER_CURL_SETUP_ONCE_H,
this single inclusion guard is enough to ensure that inclusion of
lib/setup_once.h done from lib/setup.h is only done once.
Additionally lib/setup.h has always used __SETUP_ONCE_H macro to
protect inclusion of setup_once.h even after commit ec691ca3, this
was to avoid a circular header inclusion triggered when building a
c-ares enabled version with c-ares sources available which also has
a setup_once.h header. Commit ec691ca3 exposes the real nature of
__SETUP_ONCE_H usage in lib/setup.h, it is a header inclusion guard
foreign to libcurl belonging to c-ares's setup_once.h
The renaming this commit does, fixes the circular header inclusion,
and as such removes the need and usage of a header inclusion guard
foreign to libcurl. Macro __SETUP_ONCE_H no longer used in libcurl.
2 - Due to the circular interdependency of old lib/setup_once.h and the
c-ares setup_once.h header, old file lib/setup_once.h has carried
back from 2006 up to now days an alarming and prominent notice about
the need of keeping libcurl's and c-ares's setup_once.h in sync.
Given that this commit fixes the circular interdependency, the need
and presence of mentioned notice is removed.
All mentioned interdependencies come back from now old days when
the c-ares project lived inside a curl subdirectory. This commit
removes last traces of such fact.
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This reverts renaming and usage of lib/*.h header files done
28-12-2012, reverting 2 commits:
f871de0... build: make use of 76 lib/*.h renamed files
ffd8e12... build: rename 76 lib/*.h files
This also reverts removal of redundant include guard (redundant thanks
to changes in above commits) done 2-12-2013, reverting 1 commit:
c087374... curl_setup.h: remove redundant include guard
This also reverts renaming and usage of lib/*.c source files done
3-12-2013, reverting 3 commits:
13606bb... build: make use of 93 lib/*.c renamed files
5b6e792... build: rename 93 lib/*.c files
7d83dff... build: commit 13606bbfde follow-up 1
Start of related discussion thread:
http://curl.haxx.se/mail/lib-2013-01/0012.html
Asking for confirmation on pushing this revertion commit:
http://curl.haxx.se/mail/lib-2013-01/0048.html
Confirmation summary:
http://curl.haxx.se/mail/lib-2013-01/0079.html
NOTICE: The list of 2 files that have been modified by other
intermixed commits, while renamed, and also by at least one
of the 6 commits this one reverts follows below. These 2 files
will exhibit a hole in history unless git's '--follow' option
is used when viewing logs.
lib/curl_imap.h
lib/curl_smtp.h
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93 lib/*.c source files renamed to use our standard naming scheme.
This commit only does the file renaming.
----------------------------------------
renamed: lib/amigaos.c -> lib/curl_amigaos.c
renamed: lib/asyn-ares.c -> lib/curl_asyn_ares.c
renamed: lib/asyn-thread.c -> lib/curl_asyn_thread.c
renamed: lib/axtls.c -> lib/curl_axtls.c
renamed: lib/base64.c -> lib/curl_base64.c
renamed: lib/bundles.c -> lib/curl_bundles.c
renamed: lib/conncache.c -> lib/curl_conncache.c
renamed: lib/connect.c -> lib/curl_connect.c
renamed: lib/content_encoding.c -> lib/curl_content_encoding.c
renamed: lib/cookie.c -> lib/curl_cookie.c
renamed: lib/cyassl.c -> lib/curl_cyassl.c
renamed: lib/dict.c -> lib/curl_dict.c
renamed: lib/easy.c -> lib/curl_easy.c
renamed: lib/escape.c -> lib/curl_escape.c
renamed: lib/file.c -> lib/curl_file.c
renamed: lib/fileinfo.c -> lib/curl_fileinfo.c
renamed: lib/formdata.c -> lib/curl_formdata.c
renamed: lib/ftp.c -> lib/curl_ftp.c
renamed: lib/ftplistparser.c -> lib/curl_ftplistparser.c
renamed: lib/getenv.c -> lib/curl_getenv.c
renamed: lib/getinfo.c -> lib/curl_getinfo.c
renamed: lib/gopher.c -> lib/curl_gopher.c
renamed: lib/gtls.c -> lib/curl_gtls.c
renamed: lib/hash.c -> lib/curl_hash.c
renamed: lib/hmac.c -> lib/curl_hmac.c
renamed: lib/hostasyn.c -> lib/curl_hostasyn.c
renamed: lib/hostcheck.c -> lib/curl_hostcheck.c
renamed: lib/hostip.c -> lib/curl_hostip.c
renamed: lib/hostip4.c -> lib/curl_hostip4.c
renamed: lib/hostip6.c -> lib/curl_hostip6.c
renamed: lib/hostsyn.c -> lib/curl_hostsyn.c
renamed: lib/http.c -> lib/curl_http.c
renamed: lib/http_chunks.c -> lib/curl_http_chunks.c
renamed: lib/http_digest.c -> lib/curl_http_digest.c
renamed: lib/http_negotiate.c -> lib/curl_http_negotiate.c
renamed: lib/http_negotiate_sspi.c -> lib/curl_http_negotiate_sspi.c
renamed: lib/http_proxy.c -> lib/curl_http_proxy.c
renamed: lib/idn_win32.c -> lib/curl_idn_win32.c
renamed: lib/if2ip.c -> lib/curl_if2ip.c
renamed: lib/imap.c -> lib/curl_imap.c
renamed: lib/inet_ntop.c -> lib/curl_inet_ntop.c
renamed: lib/inet_pton.c -> lib/curl_inet_pton.c
renamed: lib/krb4.c -> lib/curl_krb4.c
renamed: lib/krb5.c -> lib/curl_krb5.c
renamed: lib/ldap.c -> lib/curl_ldap.c
renamed: lib/llist.c -> lib/curl_llist.c
renamed: lib/md4.c -> lib/curl_md4.c
renamed: lib/md5.c -> lib/curl_md5.c
renamed: lib/memdebug.c -> lib/curl_memdebug.c
renamed: lib/mprintf.c -> lib/curl_mprintf.c
renamed: lib/multi.c -> lib/curl_multi.c
renamed: lib/netrc.c -> lib/curl_netrc.c
renamed: lib/non-ascii.c -> lib/curl_non_ascii.c
renamed: lib/curl_non-ascii.h -> lib/curl_non_ascii.h
renamed: lib/nonblock.c -> lib/curl_nonblock.c
renamed: lib/nss.c -> lib/curl_nss.c
renamed: lib/nwlib.c -> lib/curl_nwlib.c
renamed: lib/nwos.c -> lib/curl_nwos.c
renamed: lib/openldap.c -> lib/curl_openldap.c
renamed: lib/parsedate.c -> lib/curl_parsedate.c
renamed: lib/pingpong.c -> lib/curl_pingpong.c
renamed: lib/polarssl.c -> lib/curl_polarssl.c
renamed: lib/pop3.c -> lib/curl_pop3.c
renamed: lib/progress.c -> lib/curl_progress.c
renamed: lib/qssl.c -> lib/curl_qssl.c
renamed: lib/rawstr.c -> lib/curl_rawstr.c
renamed: lib/rtsp.c -> lib/curl_rtsp.c
renamed: lib/security.c -> lib/curl_security.c
renamed: lib/select.c -> lib/curl_select.c
renamed: lib/sendf.c -> lib/curl_sendf.c
renamed: lib/share.c -> lib/curl_share.c
renamed: lib/slist.c -> lib/curl_slist.c
renamed: lib/smtp.c -> lib/curl_smtp.c
renamed: lib/socks.c -> lib/curl_socks.c
renamed: lib/socks_gssapi.c -> lib/curl_socks_gssapi.c
renamed: lib/socks_sspi.c -> lib/curl_socks_sspi.c
renamed: lib/speedcheck.c -> lib/curl_speedcheck.c
renamed: lib/splay.c -> lib/curl_splay.c
renamed: lib/ssh.c -> lib/curl_ssh.c
renamed: lib/sslgen.c -> lib/curl_sslgen.c
renamed: lib/ssluse.c -> lib/curl_ssluse.c
renamed: lib/strdup.c -> lib/curl_strdup.c
renamed: lib/strequal.c -> lib/curl_strequal.c
renamed: lib/strerror.c -> lib/curl_strerror.c
renamed: lib/strtok.c -> lib/curl_strtok.c
renamed: lib/strtoofft.c -> lib/curl_strtoofft.c
renamed: lib/telnet.c -> lib/curl_telnet.c
renamed: lib/tftp.c -> lib/curl_tftp.c
renamed: lib/timeval.c -> lib/curl_timeval.c
renamed: lib/transfer.c -> lib/curl_transfer.c
renamed: lib/url.c -> lib/curl_url.c
renamed: lib/version.c -> lib/curl_version.c
renamed: lib/warnless.c -> lib/curl_warnless.c
renamed: lib/wildcard.c -> lib/curl_wildcard.c
----------------------------------------
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93 *.c source files renamed to use our standard naming scheme.
This change affects 77 files in libcurl's source tree.
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76 private header files renamed to use our standard naming scheme.
This change affects 322 files in libcurl's source tree.
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Inclusion of top two most included header files now done in setup_once.h
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A bundle is a list of all persistent connections to the same host.
The connection cache consists of a hash of bundles, with the
hostname as the key.
The benefits may not be obvious, but they are two:
1) Faster search for connections to reuse, since the hash
lookup only finds connections to the host in question.
2) It lays out the groundworks for an upcoming patch,
which will introduce multiple HTTP pipelines.
This patch also removes the awkward list of "closure handles",
which were needed to send QUIT commands to the FTP server
when closing a connection.
Now we allocate a separate closure handle and use that
one to close all connections.
This has been tested in a live system for a few weeks, and of
course passes the test suite.
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This handling already works with the easy-interface code. When a request
is sent on a re-used connection that gets closed by the server at the
same time as the request is sent, the situation may occur so that we can
send the request and we discover the broken connection as a RECV_ERROR
in the PERFORM state and then the request needs to be retried on a fresh
connection. Test 64 broke with 'multi-always-internally'.
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DNS cache entries populated with CURLOPT_RESOLVE were not properly freed
again when done using the multi interface.
Test case 1502 added to verify.
Bug: http://curl.haxx.se/bug/view.cgi?id=3575448
Reported by: Alex Gruz
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This is a minor change in behavior after having been pointed out by Mark
Tully and discussed on the list. Initially this case would internally
call poll() with no sockets and a timeout which would equal a sleep for
that specified time.
Bug: http://curl.haxx.se/mail/lib-2012-10/0076.html
Reported by: Mark Tully
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During the periods of rate limitation, the speedcheck function wasn't
called and thus the values weren't updated accordingly and it would then
easily trigger wrongly once data got transferred again.
Also, the progress callback's return code was not acknowledged in this
state so it could make an "abort" return code to get ignored and not
have the documented effect of aborting an ongoing transfer.
Bug: http://curl.haxx.se/mail/lib-2012-09/0081.html
Reported by: Jie He
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Minor change to recently introduced function. BC breaking, but since
curl_multi_wait() doesn't exist in any releases that should be fine.
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/*
* Name: curl_multi_wait()
*
* Desc: Poll on all fds within a CURLM set as well as any
* additional fds passed to the function.
*
* Returns: CURLMcode type, general multi error code.
*/
CURL_EXTERN CURLMcode curl_multi_wait(CURLM *multi_handle,
struct curl_waitfd extra_fds[],
unsigned int extra_nfds,
int timeout_ms);
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By reading the ->head pointer and using that instead of the ->size
number to figure out if there's a list remaining we avoid the (false
positive) clang-analyzer warning that we might dereference of a null
pointer.
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In many states the easy_conn pointer is referenced and just assumed to
be working. This is an added extra check since analyzing indicates
there's a risk we can end up in these states with a NULL pointer there.
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No need to check if 'entry' is non-NULL in a spot where it is already checked
and guaranteed to be non-NULL.
(Spotted by a Coverity scan)
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The refactoring of HTTP CONNECT handling in commit 41b0237834232 that
made it protocol independent broke it for the multi interface. This fix
now introduce a better state handling and moved some logic to the
http_proxy.c source file.
Reported by: Yang Tse
Bug: http://curl.haxx.se/mail/lib-2012-03/0162.html
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Backpedaled out the funny double-change of state in the multi state
machine by adding a new argument to the do_more() function to signal
completion. This way it can remain in the DO_MORE state properly until
done. Long term, the entire DO_MORE logic should be moved into the FTP
code and be hidden from the multi code as the logic is only used for
FTP.
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1- Two new error codes are introduced.
CURLE_FTP_ACCEPT_FAILED to be set whenever ACCEPTing fails because of
FTP server connected.
CURLE_FTP_ACCEPT_TIMEOUT to be set whenever ACCEPTing timeouts.
Neither of these errors are considered fatal and control connection
remains OK because it could just be a firewall blocking server to
connect to the client.
2- One new setopt option was introduced.
CURLOPT_ACCEPTTIMEOUT_MS
It sets the maximum amount of time FTP client is going to wait for a
server to connect. Internal default accept timeout is 60 seconds.
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If the socket callback function pointer hasn't been set, we must not
attempt to use it. Commit adc88ca20 made it more likely to occur.
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If the first name server is not available, the multi interface does
not invoke the socket_cb when the DNS request to the first name server
timesout. Ensure that the list of sockets are always updated after
calling Curl_resolver_is_resolved.
This bug can be reproduced if Curl is complied with --enable_ares and
your code uses the multi socket interfaces and the
CURLMOPT_SOCKETFUNCTION option. To test try:
iptables -I INPUT \
-s $(sed -n -e '/name/{s/.* //p;q}' /etc/resolv.conf)/32 \
-j REJECT
and then run a program which uses the multi-interface.
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