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2016-11-24proxy: Support HTTPS proxy and SOCKS+HTTP(s)Alex Rousskov
* HTTPS proxies: An HTTPS proxy receives all transactions over an SSL/TLS connection. Once a secure connection with the proxy is established, the user agent uses the proxy as usual, including sending CONNECT requests to instruct the proxy to establish a [usually secure] TCP tunnel with an origin server. HTTPS proxies protect nearly all aspects of user-proxy communications as opposed to HTTP proxies that receive all requests (including CONNECT requests) in vulnerable clear text. With HTTPS proxies, it is possible to have two concurrent _nested_ SSL/TLS sessions: the "outer" one between the user agent and the proxy and the "inner" one between the user agent and the origin server (through the proxy). This change adds supports for such nested sessions as well. A secure connection with a proxy requires its own set of the usual SSL options (their actual descriptions differ and need polishing, see TODO): --proxy-cacert FILE CA certificate to verify peer against --proxy-capath DIR CA directory to verify peer against --proxy-cert CERT[:PASSWD] Client certificate file and password --proxy-cert-type TYPE Certificate file type (DER/PEM/ENG) --proxy-ciphers LIST SSL ciphers to use --proxy-crlfile FILE Get a CRL list in PEM format from the file --proxy-insecure Allow connections to proxies with bad certs --proxy-key KEY Private key file name --proxy-key-type TYPE Private key file type (DER/PEM/ENG) --proxy-pass PASS Pass phrase for the private key --proxy-ssl-allow-beast Allow security flaw to improve interop --proxy-sslv2 Use SSLv2 --proxy-sslv3 Use SSLv3 --proxy-tlsv1 Use TLSv1 --proxy-tlsuser USER TLS username --proxy-tlspassword STRING TLS password --proxy-tlsauthtype STRING TLS authentication type (default SRP) All --proxy-foo options are independent from their --foo counterparts, except --proxy-crlfile which defaults to --crlfile and --proxy-capath which defaults to --capath. Curl now also supports %{proxy_ssl_verify_result} --write-out variable, similar to the existing %{ssl_verify_result} variable. Supported backends: OpenSSL, GnuTLS, and NSS. * A SOCKS proxy + HTTP/HTTPS proxy combination: If both --socks* and --proxy options are given, Curl first connects to the SOCKS proxy and then connects (through SOCKS) to the HTTP or HTTPS proxy. TODO: Update documentation for the new APIs and --proxy-* options. Look for "Added in 7.XXX" marks.
2016-11-18lib: fix compiler warnings after de4de4e3c7cMarcel Raad
Visual C++ now complains about implicitly casting time_t (64-bit) to long (32-bit). Fix this by changing some variables from long to time_t, or explicitly casting to long where the public interface would be affected. Closes #1131
2016-10-22multi: force connections to get closed in close_all_connectionsDaniel Stenberg
Several independent reports on infinite loops hanging in the close_all_connections() function when closing a multi handle, can be fixed by first marking the connection to get closed before calling Curl_disconnect. This is more fixing-the-symptom rather than the underlying problem though. Bug: https://curl.haxx.se/mail/lib-2016-10/0011.html Bug: https://curl.haxx.se/mail/lib-2016-10/0059.html Reported-by: Dan Fandrich, Valentin David, Miloš Ljumović
2016-10-22curl_multi_remove_handle: fix a double-freeAnders Bakken
In short the easy handle needs to be disconnected from its connection at this point since the connection still is serving other easy handles. In our app we can reliably reproduce a crash in our http2 stress test that is fixed by this change. I can't easily reproduce the same test in a small example. This is the gdb/asan output: ==11785==ERROR: AddressSanitizer: heap-use-after-free on address 0xe9f4fb80 at pc 0x09f41f19 bp 0xf27be688 sp 0xf27be67c READ of size 4 at 0xe9f4fb80 thread T13 (RESOURCE_HTTP) #0 0x9f41f18 in curl_multi_remove_handle /path/to/source/3rdparty/curl/lib/multi.c:666 0xe9f4fb80 is located 0 bytes inside of 1128-byte region [0xe9f4fb80,0xe9f4ffe8) freed by thread T13 (RESOURCE_HTTP) here: #0 0xf7b1b5c2 in __interceptor_free /opt/toolchain/src/gcc-6.2.0/libsanitizer/asan/asan_malloc_linux.cc:45 #1 0x9f7862d in conn_free /path/to/source/3rdparty/curl/lib/url.c:2808 #2 0x9f78c6a in Curl_disconnect /path/to/source/3rdparty/curl/lib/url.c:2876 #3 0x9f41b09 in multi_done /path/to/source/3rdparty/curl/lib/multi.c:615 #4 0x9f48017 in multi_runsingle /path/to/source/3rdparty/curl/lib/multi.c:1896 #5 0x9f490f1 in curl_multi_perform /path/to/source/3rdparty/curl/lib/multi.c:2123 #6 0x9c4443c in perform /path/to/source/src/net/resourcemanager/ResourceManagerCurlThread.cpp:854 #7 0x9c445e0 in ... #8 0x9c4cf1d in ... #9 0xa2be6b5 in ... #10 0xf7aa5780 in asan_thread_start /opt/toolchain/src/gcc-6.2.0/libsanitizer/asan/asan_interceptors.cc:226 #11 0xf4d3a16d in __clone (/lib/i386-linux-gnu/libc.so.6+0xe716d) previously allocated by thread T13 (RESOURCE_HTTP) here: #0 0xf7b1ba27 in __interceptor_calloc /opt/toolchain/src/gcc-6.2.0/libsanitizer/asan/asan_malloc_linux.cc:70 #1 0x9f7dfa6 in allocate_conn /path/to/source/3rdparty/curl/lib/url.c:3904 #2 0x9f88ca0 in create_conn /path/to/source/3rdparty/curl/lib/url.c:5797 #3 0x9f8c928 in Curl_connect /path/to/source/3rdparty/curl/lib/url.c:6438 #4 0x9f45a8c in multi_runsingle /path/to/source/3rdparty/curl/lib/multi.c:1411 #5 0x9f490f1 in curl_multi_perform /path/to/source/3rdparty/curl/lib/multi.c:2123 #6 0x9c4443c in perform /path/to/source/src/net/resourcemanager/ResourceManagerCurlThread.cpp:854 #7 0x9c445e0 in ... #8 0x9c4cf1d in ... #9 0xa2be6b5 in ... #10 0xf7aa5780 in asan_thread_start /opt/toolchain/src/gcc-6.2.0/libsanitizer/asan/asan_interceptors.cc:226 #11 0xf4d3a16d in __clone (/lib/i386-linux-gnu/libc.so.6+0xe716d) SUMMARY: AddressSanitizer: heap-use-after-free /path/to/source/3rdparty/curl/lib/multi.c:666 in curl_multi_remove_handle Shadow bytes around the buggy address: 0x3d3e9f20: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x3d3e9f30: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x3d3e9f40: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x3d3e9f50: fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa 0x3d3e9f60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa =>0x3d3e9f70:[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x3d3e9f80: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x3d3e9f90: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x3d3e9fa0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x3d3e9fb0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x3d3e9fc0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Heap right redzone: fb Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack partial redzone: f4 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==11785==ABORTING Thread 14 "RESOURCE_HTTP" received signal SIGABRT, Aborted. [Switching to Thread 0xf27bfb40 (LWP 12324)] 0xf7fd8be9 in __kernel_vsyscall () (gdb) bt #0 0xf7fd8be9 in __kernel_vsyscall () #1 0xf4c7ee89 in __GI_raise (sig=6) at ../sysdeps/unix/sysv/linux/raise.c:54 #2 0xf4c803e7 in __GI_abort () at abort.c:89 #3 0xf7b2ef2e in __sanitizer::Abort () at /opt/toolchain/src/gcc-6.2.0/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cc:122 #4 0xf7b262fa in __sanitizer::Die () at /opt/toolchain/src/gcc-6.2.0/libsanitizer/sanitizer_common/sanitizer_common.cc:145 #5 0xf7b21ab3 in __asan::ScopedInErrorReport::~ScopedInErrorReport (this=0xf27be171, __in_chrg=<optimized out>) at /opt/toolchain/src/gcc-6.2.0/libsanitizer/asan/asan_report.cc:689 #6 0xf7b214a5 in __asan::ReportGenericError (pc=166993689, bp=4068206216, sp=4068206204, addr=3925146496, is_write=false, access_size=4, exp=0, fatal=true) at /opt/toolchain/src/gcc-6.2.0/libsanitizer/asan/asan_report.cc:1074 #7 0xf7b21fce in __asan::__asan_report_load4 (addr=3925146496) at /opt/toolchain/src/gcc-6.2.0/libsanitizer/asan/asan_rtl.cc:129 #8 0x09f41f19 in curl_multi_remove_handle (multi=0xf3406080, data=0xde582400) at /path/to/source3rdparty/curl/lib/multi.c:666 #9 0x09f6b277 in Curl_close (data=0xde582400) at /path/to/source3rdparty/curl/lib/url.c:415 #10 0x09f3354e in curl_easy_cleanup (data=0xde582400) at /path/to/source3rdparty/curl/lib/easy.c:860 #11 0x09c6de3f in ... #12 0x09c378c5 in ... #13 0x09c48133 in ... #14 0x09c4d092 in ... #15 0x0a2be6b6 in ... #16 0xf7aa5781 in asan_thread_start (arg=0xf2d22938) at /opt/toolchain/src/gcc-6.2.0/libsanitizer/asan/asan_interceptors.cc:226 #17 0xf5de52b5 in start_thread (arg=0xf27bfb40) at pthread_create.c:333 #18 0xf4d3a16e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:114 Fixes #1083
2016-10-19curl_multi_add_handle: set timeouts in closure handlesDaniel Stenberg
The closure handle only ever has default timeouts set. To improve the state somewhat we clone the timeouts from each added handle so that the closure handle always has the same timeouts as the most recently added easy handle. Fixes #739
2016-09-04speed caps: not based on average speeds anymoreOlivier Brunel
Speed limits (from CURLOPT_MAX_RECV_SPEED_LARGE & CURLOPT_MAX_SEND_SPEED_LARGE) were applied simply by comparing limits with the cumulative average speed of the entire transfer; While this might work at times with good/constant connections, in other cases it can result to the limits simply being "ignored" for more than "short bursts" (as told in man page). Consider a download that goes on much slower than the limit for some time (because bandwidth is used elsewhere, server is slow, whatever the reason), then once things get better, curl would simply ignore the limit up until the average speed (since the beginning of the transfer) reached the limit. This could prove the limit useless to effectively avoid using the entire bandwidth (at least for quite some time). So instead, we now use a "moving starting point" as reference, and every time at least as much as the limit as been transferred, we can reset this starting point to the current position. This gets a good limiting effect that applies to the "current speed" with instant reactivity (in case of sudden speed burst). Closes #971
2016-08-28http2: make sure stream errors don't needlessly close the connectionDaniel Stenberg
With HTTP/2 each transfer is made in an indivial logical stream over the connection, making most previous errors that caused the connection to get forced-closed now instead just kill the stream and not the connection. Fixes #941
2016-08-04multi: make Curl_expire() work with 0 ms timeoutsDaniel Stenberg
Previously, passing a timeout of zero to Curl_expire() was a magic code for clearing all timeouts for the handle. That is now instead made with the new Curl_expire_clear() function and thus a 0 timeout is fine to set and will trigger a timeout ASAP. This will help removing short delays, in particular notable when doing HTTP/2.
2016-08-04transfer: return without select when the read loop reached maxcountDaniel Stenberg
Regression added in 790d6de48515. The was then added to avoid one particular transfer to starve out others. But when aborting due to reading the maxcount, the connection must be marked to be read from again without first doing a select as for some protocols (like SFTP/SCP) the data may already have been read off the socket. Reported-by: Dan Donahue Bug: https://curl.haxx.se/mail/lib-2016-07/0057.html
2016-08-03curl_multi_cleanup: clear connection pointer for easy handlesDaniel Stenberg
CVE-2016-5421 Bug: https://curl.haxx.se/docs/adv_20160803C.html Reported-by: Marcelo Echeverria and Fernando Muñoz
2016-06-22typedefs: use the full structs in internal code...Daniel Stenberg
... and save the typedef'ed names for headers and external APIs.
2016-06-22internals: rename the SessionHandle struct to Curl_easyDaniel Stenberg
2016-05-15ftp wildcard: segfault due to init only in multi_performDaniel Stenberg
The proper FTP wildcard init is now more properly done in Curl_pretransfer() and the corresponding cleanup in Curl_close(). The previous place of init/cleanup code made the internal pointer to be NULL when this feature was used with the multi_socket() API, as it was made within the curl_multi_perform() function. Reported-by: Jonathan Cardoso Machado Fixes #800
2016-04-29lib: include curl_printf.h as one of the last headersDaniel Stenberg
curl_printf.h defines printf to curl_mprintf, etc. This can cause problems with external headers which may use __attribute__((format(printf, ...))) markers etc. To avoid that they cause problems with system includes, we include curl_printf.h after any system headers. That makes the three last headers to always be, and we keep them in this order: curl_printf.h curl_memory.h memdebug.h None of them include system headers, they all do funny #defines. Reported-by: David Benjamin Fixes #743
2016-04-25multi: accidentally used resolved host name instead of proxyDaniel Stenberg
Regression introduced in 09b5a998 Bug: https://curl.haxx.se/mail/lib-2016-04/0084.html Reported-by: BoBo
2016-04-17news: CURLOPT_CONNECT_TO and --connect-toMichael Kaufmann
Makes curl connect to the given host+port instead of the host+port found in the URL.
2016-04-11http2: Add handling stream level errorTatsuhiro Tsujikawa
Previously, when a stream was closed with other than NGHTTP2_NO_ERROR by RST_STREAM, underlying TCP connection was dropped. This is undesirable since there may be other streams multiplexed and they are very much fine. This change introduce new error code CURLE_HTTP2_STREAM, which indicates stream error that only affects the relevant stream, and connection should be kept open. The existing CURLE_HTTP2 means connection error in general. Ref: https://github.com/curl/curl/issues/659 Ref: https://github.com/curl/curl/pull/663
2016-04-05multi: remove trailing space in debug outputDaniel Stenberg
2016-04-03code: style updatesDaniel Stenberg
2016-03-30multi: turn Curl_done into file local multi_doneDaniel Stenberg
... as it now is used by multi.c only.
2016-03-30multi: multi_reconnect_request is the former Curl_reconnect_requestDaniel Stenberg
now a file local function in multi.c
2016-03-30multi: move Curl_do and Curl_do_done to multi.c and make staticDaniel Stenberg
... called multi_do and multi_do_done as they're file local now.
2016-03-23multi: fix "Operation timed out after" timerDaniel Stenberg
Use the local, reasonably updated, 'now' value when creating the message string to output for the timeout condition. Fixes #619
2016-03-14multi: simplified singlesocketDaniel Stenberg
Since sh_getentry() now checks for invalid sockets itself and by narrowing the scope of the remove_sock_from_hash variable.
2016-03-14multi: introduce sh_getentry() for looking up sockets in the sockhashDaniel Stenberg
Simplify the code by using a single entry that looks for a socket in the socket hash. As indicated in #712, the code looked for CURL_SOCKET_BAD at some point and that is ineffective/wrong and this makes it easier to avoid that.
2016-03-14multi hash: ensure modulo performed on curl_socket_tJaime Fullaondo
Closes #712
2016-03-13multi_runsingle: avoid loop in CURLM_STATE_WAITPROXYCONNECTMaksim Kuzevanov
Closes #703
2016-03-10curl_multi_wait: never return -1 in 'numfds'Daniel Stenberg
Such a return value isn't documented but could still happen, and the curl tool code checks for it. It would happen when the underlying Curl_poll() function returns an error. Starting now we mask that error as a user of curl_multi_wait() would have no way to handle it anyway. Reported-by: Jay Satiro Closes #707
2016-02-23multi_remove_handle: keep the timeout list until after disconnectDaniel Stenberg
The internal Curl_done() function uses Curl_expire() at times and that uses the timeout list. Better clean up the list once we're done using it. This caused a segfault. Reported-by: 蔡文凱 Bug: https://curl.haxx.se/mail/lib-2016-02/0097.html
2016-02-03URLs: change all http:// URLs to https://Daniel Stenberg
2015-10-16multi: fix off-by-one finit[] array sizeDaniel Stenberg
introduced in c6aedf680f6. It needs to be CURLM_STATE_LAST big since it must hande the range 0 .. CURLM_STATE_MSGSENT (18) and CURLM_STATE_LAST is 19 right now. Reported-by: Dan Fandrich Bug: http://curl.haxx.se/mail/lib-2015-10/0069.html
2015-10-15fread_func: move callback pointer from set to state structDaniel Stenberg
... and assign it from the set.fread_func_set pointer in the Curl_init_CONNECT function. This A) avoids that we have code that assigns fields in the 'set' struct (which we always knew was bad) and more importantly B) it makes it impossibly to accidentally leave the wrong value for when the handle is re-used etc. Introducing a state-init functionality in multi.c, so that we can set a specific function to get called when we enter a state. The Curl_init_CONNECT is thus called when switching to the CONNECT state. Bug: https://github.com/bagder/curl/issues/346 Closes #346
2015-06-24http2: init the pushed transfer properlyDaniel Stenberg
2015-06-24http2: setup the new pushed stream properlyDaniel Stenberg
2015-06-24http2: initial implementation of the push callbackDaniel Stenberg
2015-06-23pretransfer: init state.infilesize here, not in add_handleDaniel Stenberg
... to properly support that options are set to the handle after it is added to the multi handle. Bug: http://curl.haxx.se/mail/lib-2015-06/0122.html Reported-by: Stefan Bühler
2015-06-14urldata: store POST size in state.infilesize tooDaniel Stenberg
... to simplify checking when PUT _or_ POST have completed. Reported-by: Frank Meier Bug: http://curl.haxx.se/mail/lib-2015-06/0019.html
2015-06-10debug: remove http2 debug leftoversDaniel Stenberg
2015-05-20read_callback: move to SessionHandle from connectdataDaniel Stenberg
With many easy handles using the same connection for multiplexing, it is important we store and keep the transfer-oriented stuff in the SessionHandle so that callbacks and callback data work fine even when many easy handles share the same physical connection.
2015-05-19transfer: Replace __func__ instances with function nameJay Satiro
.. also make __func__ replacement in multi. Prior to this change debug builds would fail to build if the compiler was building pre-c99 and didn't support __func__.
2015-05-18hostip: fix unintended destruction of hash tableAnthony Avina
.. and added unit1602 for hash.c
2015-05-18pipeline: switch some code over to functionsDaniel Stenberg
... to "compartmentalize" a bit and make it easier to change behavior when multiplexing is used instead of good old pipelining.
2015-05-18http2: set default concurrency, fix ConnectionExists for multiplexDaniel Stenberg
2015-05-18bundles: store no/default/pipeline/multiplexDaniel Stenberg
to allow code to act differently on the situation. Also added some more info message for the connection re-use function to make it clearer when connections are not re-used.
2015-05-18http2: separate multiplex/pipelining + cleanup memory leaksDaniel Stenberg
2015-05-18CURLMOPT_PIPELINE: bit 1 is for multiplexingDaniel Stenberg
2015-05-18http2: leave WAITPERFORM when conn is multiplexedDaniel Stenberg
No need to wait for our "spot" like for pipelining
2015-05-18http2: force "drainage" of streamsDaniel Stenberg
... which is necessary since the socket won't be readable but there is data waiting in the buffer.
2015-05-12bundles: merged into conncache.cDaniel Stenberg
All the existing Curl_bundle* functions were only ever used from within the conncache.c file, so I moved them over and made them static (and removed the Curl_ prefix).
2015-05-12hostcache: made all host caches use structs, not pointersDaniel Stenberg
This avoids unnecessary dynamic allocs and as this also removed the last users of *hash_alloc() and *hash_destroy(), those two functions are now removed.
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