kc3-lang/libevent/evdns.c

evdns.c

Log

Author Commit Date CI Message
ayuseleznev 4da9f87c 2020-02-27T16:59:45 evdns: fix a crash when evdns_base with waiting requests is freed Fix undefined behaviour and application crash that might take place in some rare cases after calling evdns_base_free when there are requests in the waiting queue. Current cleanup procedure in evdns_base_free_and_unlock function includes 2 steps: 1. Finish all inflight requests. 2. Finish all waiting requests. During the first step we iterate over each list in req_heads structure and finish all requests in these lists. With current logic finishing an inflight request (function request_finished) removes it from the inflight requests container and forces a wating connection to be sent (by calling evdns_requests_pump_waiting_queue). When these new requests are sent it is possible that they will be inserted to the list in req_heads that we've already cleaned. So in some cases container of the inflight requests is not empty after this procedure and some requests are not finished and deleted. When timeouts for these requests expire evdns_request_timeout_callback is called but corresponding evdns_base has been already deleted which causes undefined behaviour and possible applicaton crash. It is interesting to note that in old versions of libevent such situation was not possible. This bug was introduced by the commit 14f84bbdc77d90b1d936076661443cdbf516c593. Before this commit nameservers were deleted before finishing the requests. Therefore it was not possible that requests from the waiting queue be sent while we finish the inflight requests.
Azat Khuzhin c3f35345 2019-09-05T23:31:19 Fix checking return value of the evdns_base_resolv_conf_parse() Reported-by: Maxim Gorbachyov <maxim.gorbachyov@gmail.com>
yuangongji 7806f3ec 2019-07-03T00:27:22 Missing <winerror.h> on win7/MinGW(MINGW32_NT-6.1)/MSYS
Azat Khuzhin 538141eb 2019-06-15T23:18:05 evdns: add new options -- so-rcvbuf/so-sndbuf This will allow to customize SO_RCVBUF/SO_SNDBUF for nameservers in this evdns_base, you may want to adjust them if the kernel starts dropping udp packages.
zhuizhuhaomeng 8701d0d3 2019-05-06T11:37:02 evdns: fix lock/unlock mismatch in evdns_close_server_port() Closes: #809 (cherry-picked)
Azat Khuzhin 991f0ed3 2019-04-01T02:41:17 evdns: do not check server_req twice Reported by µchex: "In evdns.c, pointer server_req is null checked on line 1289 after it is dereferenced above. Since server_req was already null checked above on line 1243, there is no risk of crashing and the only bug is the redundant null check (and indentation) on line 1289. "
Azat Khuzhin e5b8f4c1 2019-04-01T01:47:00 evdns: add DNS_OPTION_NAMESERVERS_NO_DEFAULT/EVDNS_BASE_NAMESERVERS_NO_DEFAULT - DNS_OPTION_NAMESERVERS_NO_DEFAULT Do not "default" nameserver (i.e. "127.0.0.1:53") if there is no nameservers in resolv.conf, (iff DNS_OPTION_NAMESERVERS is set) - EVDNS_BASE_NAMESERVERS_NO_DEFAULT If EVDNS_BASE_INITIALIZE_NAMESERVERS isset, do not add default nameserver if there are no nameservers in resolv.conf (just set DNS_OPTION_NAMESERVERS_NO_DEFAULT internally) Fixes: #569
Nathan French fb134939 2019-02-07T11:43:14 Added DNS header mask definitions. Currently, we do a lot of data munging with manual hex. This is ugly and can lead to bugs. I defined the following: _QR_MASK 0x8000U _OP_MASK 0x7800U _AA_MASK 0x0400U _TC_MASK 0x0200U _RD_MASK 0x0100U _RA_MASK 0x0080U _Z_MASK 0x0040U _AD_MASK 0x0020U _CD_MASK 0x0010U _RCODE_MASK 0x000fU So that we can more easily twiddle flags. v2: make evdns flag masks unsigned literal Closes: #756 (cherry-picked)
Bogdan Harjoc 3e6553a1 2018-08-09T13:04:52 evdns: handle NULL filename explicitly Otherwise we will try to open NULL filename and got EFAULT and anyway will got the same return code from evdns_base_resolv_conf_parse_impl() Closes: #680 (cherry-picked)
Sergey Fionov b59525ec 2018-08-02T00:35:28 evdns: fix race condition in evdns_getaddrinfo() evdns_getaddrinfo() starts two parallel requests for A and AAAA record. But if request is created from thread different from dns_base's, request of A record is started immediately and may result in calling free_getaddrinfo_request() from evdns_getaddrinfo_gotresolve() because `other_req' doesn't exist yet. After that, request of AAAA record starts and finishes, and evdns_getaddrinfo_gotresolve() is called again for structure that is already freed. This commits adds locking into evdns_getaddrinfo() function.
Azat Khuzhin 94e7dceb 2017-01-29T17:23:14 Fix -Werror=implicit-fallthrough (fixes gcc-7) Fixes: #447
Azat Khuzhin ec65c420 2016-03-25T00:33:47 evdns: fix searching empty hostnames From #332: Here follows a bug report by **Guido Vranken** via the _Tor bug bounty program_. Please credit Guido accordingly. ## Bug report The DNS code of Libevent contains this rather obvious OOB read: ```c static char * search_make_new(const struct search_state *const state, int n, const char *const base_name) { const size_t base_len = strlen(base_name); const char need_to_append_dot = base_name[base_len - 1] == '.' ? 0 : 1; ``` If the length of ```base_name``` is 0, then line 3125 reads 1 byte before the buffer. This will trigger a crash on ASAN-protected builds. To reproduce: Build libevent with ASAN: ``` $ CFLAGS='-fomit-frame-pointer -fsanitize=address' ./configure && make -j4 ``` Put the attached ```resolv.conf``` and ```poc.c``` in the source directory and then do: ``` $ gcc -fsanitize=address -fomit-frame-pointer poc.c .libs/libevent.a $ ./a.out ================================================================= ==22201== ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60060000efdf at pc 0x4429da bp 0x7ffe1ed47300 sp 0x7ffe1ed472f8 READ of size 1 at 0x60060000efdf thread T0 ``` P.S. we can add a check earlier, but since this is very uncommon, I didn't add it. Fixes: #332
Azat Khuzhin 4db15e09 2016-03-24T12:49:47 evdns: avoid double-free in evdns_base_free() for probing requests http/cancel_by_host_no_ns: OK ../test/regress_http.c:1384: assert(regress_dnsserver(data->base, &portnum, search_table)) OK ../test/regress_http.c:1387: assert(dns_base) OK ../test/regress_http.c:1423: assert(evcon) OK ../test/regress_http.c:1444: assert(evhttp_make_request(evcon, req, EVHTTP_REQ_GET, "/delay") != -1): 0 vs -1 OK ../test/regress_http.c:1455: assert(test_ok == 2): 2 vs 2 OK ../test/regress_http.c:1480: assert(evhttp_make_request(evcon, req, EVHTTP_REQ_GET, "/test") != -1): 0 vs -1[msg] Nameserver 127.0.0.1:55948 has failed: request timed out. [msg] All nameservers have failed OK ../test/regress_http.c:1274: assert(!req) OK ../test/regress_http.c:1505: assert(evhttp_make_request(evcon, req, EVHTTP_REQ_GET, "/test") != -1): 0 vs -1 OK ../test/regress_http.c:1274: assert(!req)==19199== Invalid read of size 8 ==19199== at 0x4CC285: evdns_cancel_request (evdns.c:2849) ==19199== by 0x4CEDB2: evdns_nameserver_free (evdns.c:4018) ==19199== by 0x4CEF5B: evdns_base_free_and_unlock (evdns.c:4052) ==19199== by 0x4CF13B: evdns_base_free (evdns.c:4088) ==19199== by 0x4617A3: http_cancel_test (regress_http.c:1518) ==19199== by 0x490A78: testcase_run_bare_ (tinytest.c:105) ==19199== by 0x490D5A: testcase_run_one (tinytest.c:252) ==19199== by 0x491699: tinytest_main (tinytest.c:434) ==19199== by 0x47E0E0: main (regress_main.c:461) ==19199== Address 0x61e56d0 is 0 bytes inside a block of size 48 free'd ==19199== at 0x4C2AE6B: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==19199== by 0x4AAFFF: event_mm_free_ (event.c:3516) ==19199== by 0x4C5ADD: request_finished (evdns.c:693) ==19199== by 0x4CEE95: evdns_base_free_and_unlock (evdns.c:4040) ==19199== by 0x4CF13B: evdns_base_free (evdns.c:4088) ==19199== by 0x4617A3: http_cancel_test (regress_http.c:1518) ==19199== by 0x490A78: testcase_run_bare_ (tinytest.c:105) ==19199== by 0x490D5A: testcase_run_one (tinytest.c:252) ==19199== by 0x491699: tinytest_main (tinytest.c:434) ==19199== by 0x47E0E0: main (regress_main.c:461) ==19199== Block was alloc'd at ==19199== at 0x4C2BBD5: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==19199== by 0x4AAEB2: event_mm_calloc_ (event.c:3459) ==19199== by 0x4CAAA2: nameserver_send_probe (evdns.c:2327) ==19199== by 0x4C50FF: nameserver_prod_callback (evdns.c:494) ==19199== by 0x4A564C: event_process_active_single_queue (event.c:1646) ==19199== by 0x4A5B95: event_process_active (event.c:1738) ==19199== by 0x4A6296: event_base_loop (event.c:1961) ==19199== by 0x4A5C1D: event_base_dispatch (event.c:1772) ==19199== by 0x46172C: http_cancel_test (regress_http.c:1507) ==19199== by 0x490A78: testcase_run_bare_ (tinytest.c:105) ==19199== by 0x490D5A: testcase_run_one (tinytest.c:252) ==19199== by 0x491699: tinytest_main (tinytest.c:434) ==19199==
Azat Khuzhin 8cbe65d5 2016-03-21T17:08:34 evdns: export cancel via callbacks in util (like async lib core/extra issues)
Azat Khuzhin 96f64a02 2016-02-01T17:32:09 evdns: name_parse(): fix remote stack overread @asn-the-goblin-slayer: "the name_parse() function in libevent's DNS code is vulnerable to a buffer overread. 971 if (cp != name_out) { 972 if (cp + 1 >= end) return -1; 973 *cp++ = '.'; 974 } 975 if (cp + label_len >= end) return -1; 976 memcpy(cp, packet + j, label_len); 977 cp += label_len; 978 j += label_len; No check is made against length before the memcpy occurs. This was found through the Tor bug bounty program and the discovery should be credited to 'Guido Vranken'." Reproducer for gdb (https://gist.github.com/azat/e4fcf540e9b89ab86d02): set $PROT_NONE=0x0 set $PROT_READ=0x1 set $PROT_WRITE=0x2 set $MAP_ANONYMOUS=0x20 set $MAP_SHARED=0x01 set $MAP_FIXED=0x10 set $MAP_32BIT=0x40 start set $length=202 # overread set $length=2 # allocate with mmap to have a seg fault on page boundary set $l=(1<<20)*2 p mmap(0, $l, $PROT_READ|$PROT_WRITE, $MAP_ANONYMOUS|$MAP_SHARED|$MAP_32BIT, -1, 0) set $packet=(char *)$1+$l-$length # hack the packet set $packet[0]=63 set $packet[1]='/' p malloc(sizeof(int)) set $idx=(int *)$2 set $idx[0]=0 set $name_out_len=202 p malloc($name_out_len) set $name_out=$3 # have WRITE only mapping to fail on read set $end=$1+$l p (void *)mmap($end, 1<<12, $PROT_NONE, $MAP_ANONYMOUS|$MAP_SHARED|$MAP_FIXED|$MAP_32BIT, -1, 0) set $m=$4 p name_parse($packet, $length, $idx, $name_out, $name_out_len) x/2s (char *)$name_out Before this patch: $ gdb -ex 'source gdb' dns-example $1 = 1073741824 $2 = (void *) 0x633010 $3 = (void *) 0x633030 $4 = (void *) 0x40200000 Program received signal SIGSEGV, Segmentation fault. __memcpy_sse2_unaligned () at memcpy-sse2-unaligned.S:33 After this patch: $ gdb -ex 'source gdb' dns-example $1 = 1073741824 $2 = (void *) 0x633010 $3 = (void *) 0x633030 $4 = (void *) 0x40200000 $5 = -1 0x633030: "/" 0x633032: "" (gdb) p $m $6 = (void *) 0x40200000 (gdb) p $1 $7 = 1073741824 (gdb) p/x $1 $8 = 0x40000000 (gdb) quit P.S. plus drop one condition duplicate. Fixes: #317
Azat Khuzhin 00313c50 2015-11-23T15:05:19 evdns: evdns_base_free(): fix UAF of evdns_base with @fail_requests If you call evdns_base_free() with @fail_requests == 1, then it will defer callback with DNS_ERR_SHUTDOWN, but that callback (internal) uses data->evdns_base, but we already freed that evdns base, so we can't do this, fix this by checking @result to DNS_ERR_SHUTDOWN. Fixes: regress dns/client_fail_requests_getaddrinfo Fixes: #269
Azat Khuzhin 14f84bbd 2015-11-23T15:36:30 evdns: evdns_base_free(): free requests before namservers Otherwise we will trigger next UAF: $ valgrind --vgdb-error=1 regress --no-fork +dns/client_fail_requests ==24733== Memcheck, a memory error detector ==24733== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al. ==24733== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info ==24733== Command: regress --no-fork +dns/client_fail_requests ==24733== ==24733== ==24733== TO DEBUG THIS PROCESS USING GDB: start GDB like this ==24733== /path/to/gdb regress ==24733== and then give GDB the following command ==24733== target remote | /usr/lib/valgrind/../../bin/vgdb --pid=24733 ==24733== --pid is optional if only one valgrind process is running ==24733== dns/client_fail_requests: ==24733== Invalid read of size 4 ==24733== at 0x4C3352: request_finished (evdns.c:662) ==24733== by 0x4CC8B7: evdns_base_free_and_unlock (evdns.c:4048) ==24733== by 0x4CCAFD: evdns_base_free (evdns.c:4088) ==24733== by 0x458E95: dns_client_fail_requests_test (regress_dns.c:2039) ==24733== by 0x48EA5D: testcase_run_bare_ (tinytest.c:105) ==24733== by 0x48ED3F: testcase_run_one (tinytest.c:252) ==24733== by 0x48F67E: tinytest_main (tinytest.c:434) ==24733== by 0x47C0DA: main (regress_main.c:461) ==24733== Address 0x61e6f70 is 448 bytes inside a block of size 456 free'd ==24733== at 0x4C29EAB: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==24733== by 0x4A8F4D: event_mm_free_ (event.c:3512) ==24733== by 0x4CC7A1: evdns_nameserver_free (evdns.c:4021) ==24733== by 0x4CC7DC: evdns_base_free_and_unlock (evdns.c:4037) ==24733== by 0x4CCAFD: evdns_base_free (evdns.c:4088) ==24733== by 0x458E95: dns_client_fail_requests_test (regress_dns.c:2039) ==24733== by 0x48EA5D: testcase_run_bare_ (tinytest.c:105) ==24733== by 0x48ED3F: testcase_run_one (tinytest.c:252) ==24733== by 0x48F67E: tinytest_main (tinytest.c:434) ==24733== by 0x47C0DA: main (regress_main.c:461) ==24733== Block was alloc'd at ==24733== at 0x4C28C4F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==24733== by 0x4A8D5A: event_mm_malloc_ (event.c:3437) ==24733== by 0x4C8B96: evdns_nameserver_add_impl_ (evdns.c:2505) ==24733== by 0x4C916D: evdns_base_nameserver_ip_add (evdns.c:2629) ==24733== by 0x458DA3: dns_client_fail_requests_test (regress_dns.c:2031) ==24733== by 0x48EA5D: testcase_run_bare_ (tinytest.c:105) ==24733== by 0x48ED3F: testcase_run_one (tinytest.c:252) ==24733== by 0x48F67E: tinytest_main (tinytest.c:434) ==24733== by 0x47C0DA: main (regress_main.c:461) ==24733== ==24733== (action on error) vgdb me ... Fixes: regress dns/client_fail_requests Fixes: #269
Azat Khuzhin 9c238deb 2015-10-09T01:13:08 evdns: fix randomize-case by make case-insensitive as required Interesting that this wasn't found by regression tests since they respond with that SoME-rAndDom-CaSe domains, and no case-insensitive mode is required during comparing response from the server and request. Fixes #288 Covered-by: regress dns/search_lower
Azat Khuzhin 0c615f4e 2015-10-09T00:03:47 evnds: inline TEST_NAME macro to make debuggin easier
Nick Mathewson 4472ec68 2015-02-03T15:57:31 Merge pull request #212 from xbao/master changed strtotimeval signature to avoid conflict with Android NDK sys/time.h header (#211)
Nick Mathewson 537177d3 2015-02-02T13:57:22 New function to get address for nameserver.
Xiao Bao Clark bdbc823f 2015-01-28T17:17:02 changed strtotimeval signature as per #211
Thomas Bernard 8afbdbc4 2014-12-08T10:21:00 Fix mixed declarations and code (forbidden by ISO C90)
Azat Khuzhin 61262a0f 2014-11-12T20:16:18 evdns: avoid read-after-free in evdns_request_timeout_callback() In evdns_request_timeout_callback() in case we a giving up, we call request_finished() which will free() req structure, however we ns from it to fail it, so save pointer to ns to call nameserver_failed() on them. Founded with valgrind: $ valgrind regress dns/retry ==10497== Memcheck, a memory error detector ==10497== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al. ==10497== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info ==10497== Command: regress dns/retry ==10497== dns/retry: [forking] ==10498== Invalid read of size 8 ==10498== at 0x4C309D: evdns_request_timeout_callback (evdns.c:2179) ==10498== by 0x49EA95: event_process_active_single_queue (event.c:1576) ==10498== by 0x49EFDD: event_process_active (event.c:1668) ==10498== by 0x49F6DD: event_base_loop (event.c:1891) ==10498== by 0x49F063: event_base_dispatch (event.c:1702) ==10498== by 0x44C7F1: dns_retry_test_impl (regress_dns.c:724) ==10498== by 0x44CF60: dns_retry_test (regress_dns.c:749) ==10498== by 0x48A8A1: testcase_run_bare_ (tinytest.c:105) ==10498== by 0x48A94E: testcase_run_forked_ (tinytest.c:189) ==10498== by 0x48AB73: testcase_run_one (tinytest.c:247) ==10498== by 0x48B4C2: tinytest_main (tinytest.c:434) ==10498== by 0x477FC7: main (regress_main.c:459) ==10498== Address 0x6176ef8 is 40 bytes inside a block of size 342 free'd ==10498== at 0x4C29E90: free (vg_replace_malloc.c:473) ==10498== by 0x4A4411: event_mm_free_ (event.c:3443) ==10498== by 0x4BE8C5: request_finished (evdns.c:702) ==10498== by 0x4C3098: evdns_request_timeout_callback (evdns.c:2178) ==10498== by 0x49EA95: event_process_active_single_queue (event.c:1576) ==10498== by 0x49EFDD: event_process_active (event.c:1668) ==10498== by 0x49F6DD: event_base_loop (event.c:1891) ==10498== by 0x49F063: event_base_dispatch (event.c:1702) ==10498== by 0x44C7F1: dns_retry_test_impl (regress_dns.c:724) ==10498== by 0x44CF60: dns_retry_test (regress_dns.c:749) ==10498== by 0x48A8A1: testcase_run_bare_ (tinytest.c:105) ==10498== by 0x48A94E: testcase_run_forked_ (tinytest.c:189) ==10498== ==10498== ==10498== HEAP SUMMARY: ==10498== in use at exit: 0 bytes in 0 blocks ==10498== total heap usage: 83 allocs, 83 frees, 10,020 bytes allocated ==10498== ==10498== All heap blocks were freed -- no leaks are possible ==10498== ==10498== For counts of detected and suppressed errors, rerun with: -v ==10498== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0) OK 1 tests ok. (0 skipped) ==10497== ==10497== HEAP SUMMARY: ==10497== in use at exit: 0 bytes in 0 blocks ==10497== total heap usage: 3 allocs, 3 frees, 96 bytes allocated ==10497== ==10497== All heap blocks were freed -- no leaks are possible ==10497== ==10497== For counts of detected and suppressed errors, rerun with: -v ==10497== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0) Bug was introduced in 97c750d6602517f22a1100f16592b421c38f2a45 ("evdns: fail ns after we are failing/retrasmitting request").
Azat Khuzhin 97c750d6 2014-09-30T01:34:04 evdns: fail ns after we are failing/retrasmitting request In case we are failing request (evdns_request_timeout_callback()), we delete timeout_event in request_finished(), while just before calling request_finished() (for failing request) there was a call to nameserver_failed(), that add event for timeout_event, IOW we must fail ns after request because otherwise we will not have timeout_event actived, and we will waiting forever. Before this patch the dns/retry_disable_when_inactive will wait forever, after - OK.
Azat Khuzhin 74d0eee8 2014-04-10T19:30:47 evdns: fix EVDNS_BASE_DISABLE_WHEN_INACTIVE in case retransmit/retry
Nick Mathewson c8c7fa3a 2014-09-18T11:41:18 Merge pull request #119 from ldx/winhosts Fix hosts file use on Windows.
Nick Mathewson a7d5dabf 2014-09-18T11:24:56 Merge pull request #129 from azat/disable-probing-with-disable-when-inactive-v2 evdns: disable probing with EVDNS_BASE_DISABLE_WHEN_INACTIVE
ufo2243 3a4d249c 2014-09-03T10:55:27 [Bugfix] fix grammer error
Nick Mathewson 6a53d153 2014-08-29T15:26:56 Correctly handle allocation failures in evdns_getaddrinfo Kuldeep Gupta appears to have used some kind of automated tool to find this and generate a patch for half the issue as #149.
Azat Khuzhin d83b3371 2014-04-10T19:45:31 evdns: we don't need to add retry timer in transmit_to it will be done on fail
Azat Khuzhin 610410b5 2014-03-21T17:04:58 evdns: disable probing with EVDNS_BASE_DISABLE_WHEN_INACTIVE When user install EVDNS_BASE_DISABLE_WHEN_INACTIVE flag for evdns base, we must remove the timer that is used for probing, if current dns server failed, otherwise it won't break the loop.
Nick Mathewson b163fdaa 2014-03-26T11:10:16 Merge remote-tracking branch 'origin/patches-2.0'
Nick Mathewson e8fe749d 2014-03-21T14:08:17 Fix a crash in evdns related to shutting down evdns (Improved version to deal correctly with probe requests) Patch from YASUOKA Masahiko; fix for libevent github issue #113.
Nick Mathewson 86665a58 2014-03-21T14:09:54 Merge remote-tracking branch 'origin/patches-2.0'
Nick Mathewson 9f39c887 2014-03-21T14:08:17 Fix a crash in evdns related to shutting down evdns Patch from YASUOKA Masahiko; fix for libevent github issue #113.
Vilmos Nebehaj d0dc861b 2014-03-21T14:38:11 Don't truncate hosts file path on Windows. Since evutil_snprintf() (actually evutil_vsnprintf() called by it) will make sure the buffer is null-terminated by placing a null byte at len_out - 1, we need to pass the full length of the buffer; otherwise the path will end in "\\host" instead of "\\hosts".
Vilmos Nebehaj a0b247cd 2014-03-21T14:36:15 Load hosts file on Windows. Hosts files are not loaded in evdns_base_config_windows_nameservers() if load_nameservers_with_getnetworkparams() succeeds on Windows. Parse and load it first before setting up nameservers.
Nick Mathewson 254c04ec 2013-12-24T15:01:34 Fix needless bufferevent includes in evdns.c
Antony Antony 62f596b7 2013-05-09T06:50:52 fix for ServFail from RIPE Atlas release
Joakim Soderberg 3d105414 2013-12-09T16:58:16 Fix non-C89 variable declaration. Microsofts C compiler does not support the C99 standard, so variables has to be declared at the start of a scope.
Joakim Soderberg e6b2a267 2013-12-09T16:54:57 Fix non-C89 variable declaration. Microsofts C compiler does not support the C99 standard, so variables has to be declared at the start of a scope.
Nick Mathewson 45eba6ff 2013-12-06T10:50:17 Rename flush_outdated_host_addresses to clear_host_addresses "flush" can imply writing something out to a file or connection before clearing it; "clear" always means "remove". It's also potentially misleading to say "outdated" here, since the function removes _all_ addresses regardless, not just certain outdated ones. Also, don't free the lock in this function. Also reindent the function.
Kuldeep Gupta 954d2f94 2013-12-06T16:53:16 bug fix for issues #293 evdns_base_load_hosts doesn't remove outdated adresses As mentioned at https://sourceforge.net/p/levent/bugs/293/ created a small function "evdns_base_flush_outdated_host_addresses" which removes all the previous requests of hosts , if user wants to clean up the list of hosts can call and use this function. Requires function declaration to be added in include/event2/dns.h Adding it in another patch for the same bug.
Greg Hazel 363388a0 2013-05-29T14:19:14 restore the comment
Azat Khuzhin f8d7df85 2013-05-11T03:53:11 Fix SEGFAULT after evdns_base_resume if no nameservers installed. If there is no nameservers installed, using evdns_base_nameserver_ip_add(), than evdns_base_resume() will SEGFAULT, because of NULL dereference in evdns_requests_pump_waiting_queue() Conflicts: evdns.c
Nick Mathewson e1766a1b 2013-05-29T16:26:50 Actually use the log facility for reporting evdns problems. Fixes issue #63. Also refactors the evdns logging and log backend a bit, so that it wastes a little less code.
Azat Khuzhin 14971a83 2013-05-11T03:53:11 Fix SEGFAULT after evdns_base_resume if no nameservers installed. If there is no nameservers installed, using evdns_base_nameserver_ip_add(), than evdns_base_resume() will SEGFAULT, because of NULL dereference in evdns_requests_pump_waiting_queue()
Nick Mathewson ef820dbf 2013-05-07T10:03:28 Merge remote-tracking branch 'origin/patches-2.0'
Belobrov Andrey 5c710c03 2013-05-06T18:15:03 Checking request nameserver for NULL, before using it.
Azat Khuzhin 6b7fa620 2013-03-27T20:15:46 evdns: New flag to make evdns not prevent the event loop from exiting Here is the brief description of problem: When you are use evdns to resolve domains to IP adresses (see ./sample/dns-example) you loop never returns from event_base_dispatch(), and because of this the program will never terminated. Because existing programs may be depending on the old behavior, we only apply the fix when evdns_base_new() is created with a new flag - EVDNS_BASE_DISABLE_WHEN_INACTIVE. (Commit message edited by Nick while squashing the branch.)
Nick Mathewson 8827dbc3 2012-09-12T20:19:22 Merge remote-tracking branch 'origin/patches-2.0'
George Danchev f2bff75e 2012-09-12T20:12:03 FIx another memleak on OOM in evdns
George Danchev 73e85dd0 2012-09-12T20:11:12 Avoid a memory-leak on OOM in evdns.
Nick Mathewson 9be8624b 2012-07-30T17:08:44 Merge remote-tracking branch 'origin/patches-2.0'
Greg Hazel dc320776 2012-07-30T16:52:55 Avoid segfault on weird timeout during name lookup. If an evdns_getaddrinfo timeout happens while pending_cb is set, and a callback is about to run, but we get a call to evdns_getaddrinfo_gotresolve before it finishes. Github issue #60. Thanks to Greg Hazel for patch and patience.
Nick Mathewson 9852107f 2012-07-26T10:43:13 Merge remote-tracking branch 'origin/patches-2.0' Conflicts: buffer.c http.c
Nick Mathewson a1a0e675 2012-07-26T10:38:29 memset sockaddr_in before using it. Found by coverity.
Nick Mathewson c0e425ab 2012-05-09T11:06:06 Restore our priority-inversion-prevention code with deferreds Back when deferred_cb stuff had its own queue, the queue was always executed, but we never ran more than 16 callbacks per iteration. That made for two problems: 1: Because deferred_cb stuff would always run, and had no priority, it could cause priority inversion. 2: It doesn't respect the max_dispatch_interval code. Then, when I refactored deferred_cb to be a special case of event_callback, that solved the above issues, but made for two more issues: 3: Because deferred_cb stuff would always get the default priority, it could could low-priority bufferevents to get too much priority. 4: With code like bufferevent_pair, it's easy to get into a situation where two deferreds keep adding one another, preventing the event loop from ever actually scanning for more events. This commit fixes the above by giving deferreds a better notion of priorities, and by limiting the number of deferreds that can be added to the _current_ loop iteration's active queues. (Extra deferreds are put into the active_later state.) That isn't an all-purpose priority inversion solution, of course: for that, you may need to mess around with max_dispatch_interval.
Nick Mathewson a4079aa8 2012-04-06T11:05:35 Replace more deferred_cb names with event_callback
Nick Mathewson ae2b84b2 2012-04-06T04:33:19 Replace deferred_cbs with event_callback-based implementation.
Nick Mathewson 4b70286e 2012-05-02T17:12:23 Merge remote-tracking branch 'origin/patches-2.0' Conflicts: ChangeLog README evdns.c sample/dns-example.c
Nick Mathewson 265e6779 2012-05-02T16:52:27 Fix evdns build with threads disabled The last evdns change apparently broke it, by using a "base" variable that we were only declaring with threads turned on.
Nick Mathewson 3d9e52ac 2012-05-01T19:52:55 When retransmitting a timed-out DNS request, pick a fresh nameserver. Otherwise, requests initially sent to a failing nameserver would stay there indefinitely, even if other nameservers would work. Fix for sourceforge bug 3518439
Nick Mathewson d873d678 2012-05-01T19:52:49 Make some evdns.c debug logs more verbose
Nick Mathewson 3f659e5a 2012-04-19T11:14:58 Merge remote-tracking branch 'origin/patches-2.0'
Greg Hazel 46b80608 2012-04-18T21:41:48 remove redundant DNS_ERR_CANCEL check, move comment
Greg Hazel 94d23360 2012-04-18T21:29:21 cancel the probe request when the server is freed, and ignore cancelled probe callbacks
Nick Mathewson 946b5841 2012-02-29T15:47:16 Clean up lingering _identifiers.
Nick Mathewson 8ac3c4c2 2012-02-29T15:07:33 Have all visible internal function names end with an underscore. We haven't had a convention for naming internal functions in -internal.h versus naming visible functions in include/**.h. This patch changes every function declared in a -internal.h file to be named ending with an underscore. Static function names are unaffected, since there's no risk of calling them from outside Libevent. This is an automatic conversion. The script that produced was made by running the following script over the output of ctags --c-kinds=pf -o - *-internal.h | cut -f 1 | sort| uniq (GNU ctags was required.) ===== #!/usr/bin/perl -w -n use strict; BEGIN { print "#!/usr/bin/perl -w -i -p\n\n"; } chomp; my $ident = $_; next if ($ident =~ /_$/); next if ($ident =~ /^TAILQ/); my $better = "${ident}_"; print "s/(?<![A-Za-z0-9_])$ident(?![A-Za-z0-9_])/$better/g;\n"; === And then running the script below that it generated over all === the .c and .h files again #!/usr/bin/perl -w -i -p s/(?<![A-Za-z0-9_])bufferevent_async_can_connect(?![A-Za-z0-9_])/bufferevent_async_can_connect_/g; s/(?<![A-Za-z0-9_])bufferevent_async_connect(?![A-Za-z0-9_])/bufferevent_async_connect_/g; s/(?<![A-Za-z0-9_])bufferevent_async_new(?![A-Za-z0-9_])/bufferevent_async_new_/g; s/(?<![A-Za-z0-9_])bufferevent_async_set_connected(?![A-Za-z0-9_])/bufferevent_async_set_connected_/g; s/(?<![A-Za-z0-9_])bufferevent_decref(?![A-Za-z0-9_])/bufferevent_decref_/g; 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s/(?<![A-Za-z0-9_])event_iocp_port_associate(?![A-Za-z0-9_])/event_iocp_port_associate_/g; s/(?<![A-Za-z0-9_])event_iocp_port_launch(?![A-Za-z0-9_])/event_iocp_port_launch_/g; s/(?<![A-Za-z0-9_])event_iocp_shutdown(?![A-Za-z0-9_])/event_iocp_shutdown_/g; s/(?<![A-Za-z0-9_])event_overlapped_init(?![A-Za-z0-9_])/event_overlapped_init_/g; s/(?<![A-Za-z0-9_])evhttp_connection_connect(?![A-Za-z0-9_])/evhttp_connection_connect_/g; s/(?<![A-Za-z0-9_])evhttp_connection_fail(?![A-Za-z0-9_])/evhttp_connection_fail_/g; s/(?<![A-Za-z0-9_])evhttp_connection_reset(?![A-Za-z0-9_])/evhttp_connection_reset_/g; s/(?<![A-Za-z0-9_])evhttp_parse_firstline(?![A-Za-z0-9_])/evhttp_parse_firstline_/g; s/(?<![A-Za-z0-9_])evhttp_parse_headers(?![A-Za-z0-9_])/evhttp_parse_headers_/g; s/(?<![A-Za-z0-9_])evhttp_response_code(?![A-Za-z0-9_])/evhttp_response_code_/g; s/(?<![A-Za-z0-9_])evhttp_send_page(?![A-Za-z0-9_])/evhttp_send_page_/g; s/(?<![A-Za-z0-9_])evhttp_start_read(?![A-Za-z0-9_])/evhttp_start_read_/g; s/(?<![A-Za-z0-9_])EVLOCK_TRY_LOCK(?![A-Za-z0-9_])/EVLOCK_TRY_LOCK_/g; s/(?<![A-Za-z0-9_])evmap_check_integrity(?![A-Za-z0-9_])/evmap_check_integrity_/g; s/(?<![A-Za-z0-9_])evmap_delete_all(?![A-Za-z0-9_])/evmap_delete_all_/g; s/(?<![A-Za-z0-9_])evmap_foreach_event(?![A-Za-z0-9_])/evmap_foreach_event_/g; s/(?<![A-Za-z0-9_])evmap_io_active(?![A-Za-z0-9_])/evmap_io_active_/g; s/(?<![A-Za-z0-9_])evmap_io_add(?![A-Za-z0-9_])/evmap_io_add_/g; s/(?<![A-Za-z0-9_])evmap_io_clear(?![A-Za-z0-9_])/evmap_io_clear_/g; s/(?<![A-Za-z0-9_])evmap_io_del(?![A-Za-z0-9_])/evmap_io_del_/g; s/(?<![A-Za-z0-9_])evmap_io_get_fdinfo(?![A-Za-z0-9_])/evmap_io_get_fdinfo_/g; s/(?<![A-Za-z0-9_])evmap_io_initmap(?![A-Za-z0-9_])/evmap_io_initmap_/g; s/(?<![A-Za-z0-9_])evmap_reinit(?![A-Za-z0-9_])/evmap_reinit_/g; s/(?<![A-Za-z0-9_])evmap_signal_active(?![A-Za-z0-9_])/evmap_signal_active_/g; s/(?<![A-Za-z0-9_])evmap_signal_add(?![A-Za-z0-9_])/evmap_signal_add_/g; s/(?<![A-Za-z0-9_])evmap_signal_clear(?![A-Za-z0-9_])/evmap_signal_clear_/g; s/(?<![A-Za-z0-9_])evmap_signal_del(?![A-Za-z0-9_])/evmap_signal_del_/g; 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s/(?<![A-Za-z0-9_])min_heap_pop(?![A-Za-z0-9_])/min_heap_pop_/g; s/(?<![A-Za-z0-9_])min_heap_push(?![A-Za-z0-9_])/min_heap_push_/g; s/(?<![A-Za-z0-9_])min_heap_reserve(?![A-Za-z0-9_])/min_heap_reserve_/g; s/(?<![A-Za-z0-9_])min_heap_size(?![A-Za-z0-9_])/min_heap_size_/g; s/(?<![A-Za-z0-9_])min_heap_top(?![A-Za-z0-9_])/min_heap_top_/g;
Nick Mathewson cb9da0bf 2012-02-29T15:07:32 Fix all identifiers with names beginning with underscore. These are reserved in C. We'd been erroneously using them to indicate internal use. Instead, we now use a trailing underscore whenever we'd been using a leading underscore. This is an automatic conversion. The script that produced was made by running the following script over the output of git ls-tree -r --name-only HEAD | grep '\.[ch]$' | \ xargs ctags --c-kinds=defglmpstuvx -o - | grep '^_' | \ cut -f 1 | sort| uniq (GNU ctags was required.) ===== #!/usr/bin/perl -w -n use strict; BEGIN { print "#!/usr/bin/perl -w -i -p\n\n"; } chomp; next if (/^__func__/ or /^_FILE_OFFSET_BITS/ or /^_FORTIFY_SOURCE/ or /^_GNU_SOURCE/ or /^_WIN32/ or /^_DARWIN_UNLIMITED/ or /^_FILE_OFFSET_BITS/ or /^_LARGEFILE64_SOURCE/ or /^_LFS64_LARGEFILE/ or /^__cdecl/ or /^__attribute__/ or /^__func__/ or /^_SYS_TREE_H_/); my $ident = $_; my $better = $ident; $better =~ s/^_//; if ($ident !~ /EVENT_LOG_/) { $better = "${better}_"; } print "s/(?<![A-Za-z0-9_])$ident(?![A-Za-z0-9_])/$better/g;\n"; === And then running the script below that it generated over all === the .c and .h files again #!/usr/bin/perl -w -i -p s/(?<![A-Za-z0-9_])_ARC4_LOCK(?![A-Za-z0-9_])/ARC4_LOCK_/g; s/(?<![A-Za-z0-9_])_ARC4_UNLOCK(?![A-Za-z0-9_])/ARC4_UNLOCK_/g; s/(?<![A-Za-z0-9_])_bev_group_random_element(?![A-Za-z0-9_])/bev_group_random_element_/g; s/(?<![A-Za-z0-9_])_bev_group_refill_callback(?![A-Za-z0-9_])/bev_group_refill_callback_/g; s/(?<![A-Za-z0-9_])_bev_group_suspend_reading(?![A-Za-z0-9_])/bev_group_suspend_reading_/g; s/(?<![A-Za-z0-9_])_bev_group_suspend_writing(?![A-Za-z0-9_])/bev_group_suspend_writing_/g; s/(?<![A-Za-z0-9_])_bev_group_unsuspend_reading(?![A-Za-z0-9_])/bev_group_unsuspend_reading_/g; s/(?<![A-Za-z0-9_])_bev_group_unsuspend_writing(?![A-Za-z0-9_])/bev_group_unsuspend_writing_/g; s/(?<![A-Za-z0-9_])_bev_refill_callback(?![A-Za-z0-9_])/bev_refill_callback_/g; s/(?<![A-Za-z0-9_])_bufferevent_add_event(?![A-Za-z0-9_])/bufferevent_add_event_/g; s/(?<![A-Za-z0-9_])_bufferevent_cancel_all(?![A-Za-z0-9_])/bufferevent_cancel_all_/g; s/(?<![A-Za-z0-9_])_bufferevent_decref_and_unlock(?![A-Za-z0-9_])/bufferevent_decref_and_unlock_/g; s/(?<![A-Za-z0-9_])_bufferevent_decrement_read_buckets(?![A-Za-z0-9_])/bufferevent_decrement_read_buckets_/g; s/(?<![A-Za-z0-9_])_bufferevent_decrement_write_buckets(?![A-Za-z0-9_])/bufferevent_decrement_write_buckets_/g; s/(?<![A-Za-z0-9_])_bufferevent_del_generic_timeout_cbs(?![A-Za-z0-9_])/bufferevent_del_generic_timeout_cbs_/g; s/(?<![A-Za-z0-9_])_bufferevent_generic_adj_timeouts(?![A-Za-z0-9_])/bufferevent_generic_adj_timeouts_/g; s/(?<![A-Za-z0-9_])_bufferevent_get_read_max(?![A-Za-z0-9_])/bufferevent_get_read_max_/g; s/(?<![A-Za-z0-9_])_bufferevent_get_rlim_max(?![A-Za-z0-9_])/bufferevent_get_rlim_max_/g; s/(?<![A-Za-z0-9_])_bufferevent_get_write_max(?![A-Za-z0-9_])/bufferevent_get_write_max_/g; s/(?<![A-Za-z0-9_])_bufferevent_incref_and_lock(?![A-Za-z0-9_])/bufferevent_incref_and_lock_/g; s/(?<![A-Za-z0-9_])_bufferevent_init_generic_timeout_cbs(?![A-Za-z0-9_])/bufferevent_init_generic_timeout_cbs_/g; s/(?<![A-Za-z0-9_])_bufferevent_ratelim_init(?![A-Za-z0-9_])/bufferevent_ratelim_init_/g; s/(?<![A-Za-z0-9_])_bufferevent_run_eventcb(?![A-Za-z0-9_])/bufferevent_run_eventcb_/g; s/(?<![A-Za-z0-9_])_bufferevent_run_readcb(?![A-Za-z0-9_])/bufferevent_run_readcb_/g; s/(?<![A-Za-z0-9_])_bufferevent_run_writecb(?![A-Za-z0-9_])/bufferevent_run_writecb_/g; s/(?<![A-Za-z0-9_])_ev(?![A-Za-z0-9_])/ev_/g; s/(?<![A-Za-z0-9_])_evbuffer_chain_pin(?![A-Za-z0-9_])/evbuffer_chain_pin_/g; s/(?<![A-Za-z0-9_])_evbuffer_chain_unpin(?![A-Za-z0-9_])/evbuffer_chain_unpin_/g; s/(?<![A-Za-z0-9_])_evbuffer_decref_and_unlock(?![A-Za-z0-9_])/evbuffer_decref_and_unlock_/g; s/(?<![A-Za-z0-9_])_evbuffer_expand_fast(?![A-Za-z0-9_])/evbuffer_expand_fast_/g; s/(?<![A-Za-z0-9_])_evbuffer_incref(?![A-Za-z0-9_])/evbuffer_incref_/g; s/(?<![A-Za-z0-9_])_evbuffer_incref_and_lock(?![A-Za-z0-9_])/evbuffer_incref_and_lock_/g; s/(?<![A-Za-z0-9_])_EVBUFFER_IOVEC_IS_NATIVE(?![A-Za-z0-9_])/EVBUFFER_IOVEC_IS_NATIVE_/g; s/(?<![A-Za-z0-9_])_evbuffer_overlapped_get_fd(?![A-Za-z0-9_])/evbuffer_overlapped_get_fd_/g; s/(?<![A-Za-z0-9_])_evbuffer_overlapped_set_fd(?![A-Za-z0-9_])/evbuffer_overlapped_set_fd_/g; s/(?<![A-Za-z0-9_])_evbuffer_read_setup_vecs(?![A-Za-z0-9_])/evbuffer_read_setup_vecs_/g; s/(?<![A-Za-z0-9_])_evbuffer_validate(?![A-Za-z0-9_])/evbuffer_validate_/g; s/(?<![A-Za-z0-9_])_evdns_log(?![A-Za-z0-9_])/evdns_log_/g; s/(?<![A-Za-z0-9_])_evdns_nameserver_add_impl(?![A-Za-z0-9_])/evdns_nameserver_add_impl_/g; s/(?<![A-Za-z0-9_])_EVENT_CONFIG_H_(?![A-Za-z0-9_])/EVENT_CONFIG_H__/g; s/(?<![A-Za-z0-9_])_event_debug_assert_is_setup(?![A-Za-z0-9_])/event_debug_assert_is_setup_/g; s/(?<![A-Za-z0-9_])_event_debug_assert_not_added(?![A-Za-z0-9_])/event_debug_assert_not_added_/g; s/(?<![A-Za-z0-9_])_event_debug_get_logging_mask(?![A-Za-z0-9_])/event_debug_get_logging_mask_/g; s/(?<![A-Za-z0-9_])_event_debug_logging_mask(?![A-Za-z0-9_])/event_debug_logging_mask_/g; s/(?<![A-Za-z0-9_])_event_debug_map_lock(?![A-Za-z0-9_])/event_debug_map_lock_/g; s/(?<![A-Za-z0-9_])_event_debug_mode_on(?![A-Za-z0-9_])/event_debug_mode_on_/g; s/(?<![A-Za-z0-9_])_event_debug_note_add(?![A-Za-z0-9_])/event_debug_note_add_/g; s/(?<![A-Za-z0-9_])_event_debug_note_del(?![A-Za-z0-9_])/event_debug_note_del_/g; s/(?<![A-Za-z0-9_])_event_debug_note_setup(?![A-Za-z0-9_])/event_debug_note_setup_/g; s/(?<![A-Za-z0-9_])_event_debug_note_teardown(?![A-Za-z0-9_])/event_debug_note_teardown_/g; s/(?<![A-Za-z0-9_])_event_debugx(?![A-Za-z0-9_])/event_debugx_/g; s/(?<![A-Za-z0-9_])_EVENT_DEFINED_LISTENTRY(?![A-Za-z0-9_])/EVENT_DEFINED_LISTENTRY_/g; s/(?<![A-Za-z0-9_])_EVENT_DEFINED_TQENTRY(?![A-Za-z0-9_])/EVENT_DEFINED_TQENTRY_/g; s/(?<![A-Za-z0-9_])_EVENT_DEFINED_TQHEAD(?![A-Za-z0-9_])/EVENT_DEFINED_TQHEAD_/g; s/(?<![A-Za-z0-9_])_EVENT_DNS_USE_FTIME_FOR_ID(?![A-Za-z0-9_])/EVENT_DNS_USE_FTIME_FOR_ID_/g; s/(?<![A-Za-z0-9_])_EVENT_ERR_ABORT(?![A-Za-z0-9_])/EVENT_ERR_ABORT_/g; s/(?<![A-Za-z0-9_])_EVENT_EVCONFIG__PRIVATE_H(?![A-Za-z0-9_])/EVENT_EVCONFIG__PRIVATE_H_/g; s/(?<![A-Za-z0-9_])_event_iocp_port_unlock_and_free(?![A-Za-z0-9_])/event_iocp_port_unlock_and_free_/g; s/(?<![A-Za-z0-9_])_EVENT_LOG_DEBUG(?![A-Za-z0-9_])/EVENT_LOG_DEBUG/g; s/(?<![A-Za-z0-9_])_EVENT_LOG_ERR(?![A-Za-z0-9_])/EVENT_LOG_ERR/g; s/(?<![A-Za-z0-9_])_EVENT_LOG_MSG(?![A-Za-z0-9_])/EVENT_LOG_MSG/g; s/(?<![A-Za-z0-9_])_EVENT_LOG_WARN(?![A-Za-z0-9_])/EVENT_LOG_WARN/g; s/(?<![A-Za-z0-9_])_event_strlcpy(?![A-Za-z0-9_])/event_strlcpy_/g; s/(?<![A-Za-z0-9_])_EVHTTP_REQ_UNKNOWN(?![A-Za-z0-9_])/EVHTTP_REQ_UNKNOWN_/g; s/(?<![A-Za-z0-9_])_EVLOCK_SORTLOCKS(?![A-Za-z0-9_])/EVLOCK_SORTLOCKS_/g; s/(?<![A-Za-z0-9_])_evrpc_hooks(?![A-Za-z0-9_])/evrpc_hooks_/g; s/(?<![A-Za-z0-9_])_evsig_restore_handler(?![A-Za-z0-9_])/evsig_restore_handler_/g; s/(?<![A-Za-z0-9_])_evsig_set_handler(?![A-Za-z0-9_])/evsig_set_handler_/g; s/(?<![A-Za-z0-9_])_evthread_cond_fns(?![A-Za-z0-9_])/evthread_cond_fns_/g; s/(?<![A-Za-z0-9_])_evthread_debug_get_real_lock(?![A-Za-z0-9_])/evthread_debug_get_real_lock_/g; s/(?<![A-Za-z0-9_])_evthread_id_fn(?![A-Za-z0-9_])/evthread_id_fn_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_cond_alloc(?![A-Za-z0-9_])/evthreadimpl_cond_alloc_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_cond_free(?![A-Za-z0-9_])/evthreadimpl_cond_free_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_cond_signal(?![A-Za-z0-9_])/evthreadimpl_cond_signal_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_cond_wait(?![A-Za-z0-9_])/evthreadimpl_cond_wait_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_get_id(?![A-Za-z0-9_])/evthreadimpl_get_id_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_is_lock_debugging_enabled(?![A-Za-z0-9_])/evthreadimpl_is_lock_debugging_enabled_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_lock_alloc(?![A-Za-z0-9_])/evthreadimpl_lock_alloc_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_lock_free(?![A-Za-z0-9_])/evthreadimpl_lock_free_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_locking_enabled(?![A-Za-z0-9_])/evthreadimpl_locking_enabled_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_lock_lock(?![A-Za-z0-9_])/evthreadimpl_lock_lock_/g; s/(?<![A-Za-z0-9_])_evthreadimpl_lock_unlock(?![A-Za-z0-9_])/evthreadimpl_lock_unlock_/g; s/(?<![A-Za-z0-9_])_evthread_is_debug_lock_held(?![A-Za-z0-9_])/evthread_is_debug_lock_held_/g; s/(?<![A-Za-z0-9_])_evthread_lock_debugging_enabled(?![A-Za-z0-9_])/evthread_lock_debugging_enabled_/g; s/(?<![A-Za-z0-9_])_evthread_lock_fns(?![A-Za-z0-9_])/evthread_lock_fns_/g; s/(?<![A-Za-z0-9_])_EVUTIL_NIL_CONDITION(?![A-Za-z0-9_])/EVUTIL_NIL_CONDITION_/g; s/(?<![A-Za-z0-9_])_EVUTIL_NIL_STMT(?![A-Za-z0-9_])/EVUTIL_NIL_STMT_/g; s/(?<![A-Za-z0-9_])_evutil_weakrand(?![A-Za-z0-9_])/evutil_weakrand_/g; s/(?<![A-Za-z0-9_])_http_close_detection(?![A-Za-z0-9_])/http_close_detection_/g; s/(?<![A-Za-z0-9_])_http_connection_test(?![A-Za-z0-9_])/http_connection_test_/g; s/(?<![A-Za-z0-9_])_http_incomplete_test(?![A-Za-z0-9_])/http_incomplete_test_/g; s/(?<![A-Za-z0-9_])_http_stream_in_test(?![A-Za-z0-9_])/http_stream_in_test_/g; s/(?<![A-Za-z0-9_])_internal(?![A-Za-z0-9_])/internal_/g; s/(?<![A-Za-z0-9_])_mm_free_fn(?![A-Za-z0-9_])/mm_free_fn_/g; s/(?<![A-Za-z0-9_])_mm_malloc_fn(?![A-Za-z0-9_])/mm_malloc_fn_/g; s/(?<![A-Za-z0-9_])_mm_realloc_fn(?![A-Za-z0-9_])/mm_realloc_fn_/g; s/(?<![A-Za-z0-9_])_original_cond_fns(?![A-Za-z0-9_])/original_cond_fns_/g; s/(?<![A-Za-z0-9_])_original_lock_fns(?![A-Za-z0-9_])/original_lock_fns_/g; s/(?<![A-Za-z0-9_])_rpc_hook_ctx(?![A-Za-z0-9_])/rpc_hook_ctx_/g; s/(?<![A-Za-z0-9_])_SYS_QUEUE_H_(?![A-Za-z0-9_])/SYS_QUEUE_H__/g; s/(?<![A-Za-z0-9_])_t(?![A-Za-z0-9_])/t_/g; s/(?<![A-Za-z0-9_])_t32(?![A-Za-z0-9_])/t32_/g; s/(?<![A-Za-z0-9_])_test_ai_eq(?![A-Za-z0-9_])/test_ai_eq_/g; s/(?<![A-Za-z0-9_])_URI_ADD(?![A-Za-z0-9_])/URI_ADD_/g; s/(?<![A-Za-z0-9_])_URI_FREE_STR(?![A-Za-z0-9_])/URI_FREE_STR_/g; s/(?<![A-Za-z0-9_])_URI_SET_STR(?![A-Za-z0-9_])/URI_SET_STR_/g; s/(?<![A-Za-z0-9_])_warn_helper(?![A-Za-z0-9_])/warn_helper_/g;
Nick Mathewson 68120d9b 2012-02-29T15:07:31 Convert event-config.h macros to avoid reserved identifiers C reserves all identifiers beginning with an underscore for system use. But we had been mangling our autoconf identifiers with the prefix "_EVENT_" to avoid conflict with other programs. Instead, we will now use the prefix "EVENT__". With any luck, the double-underscore will still hint "here be dragons" to anybody tempted to think that event-config.h is a stable api. This is an automatically generated patch. The script that produced it was made by running this script over config.h.in: ===== #!/usr/bin/perl -w # Run this on config.h.in use strict; my %macros = (); while (<>) { if (/^# *undef +([A-Za-z0-9_]+)/) { $macros{$1} = 1; } } print "#!/usr/bin/perl -w -i -p\n\n"; for my $k (sort keys %macros) { print "s/(?<![A-Za-z0-9_])_EVENT_$k(?![A-Za-z0-9_])/EVENT__$k/g;\n"; } == And the script that it generated was then run over all .c and .h files: #!/usr/bin/perl -w -i -p s/(?<![A-Za-z0-9_])_EVENT_DISABLE_DEBUG_MODE(?![A-Za-z0-9_])/EVENT__DISABLE_DEBUG_MODE/g; s/(?<![A-Za-z0-9_])_EVENT_DISABLE_MM_REPLACEMENT(?![A-Za-z0-9_])/EVENT__DISABLE_MM_REPLACEMENT/g; s/(?<![A-Za-z0-9_])_EVENT_DISABLE_THREAD_SUPPORT(?![A-Za-z0-9_])/EVENT__DISABLE_THREAD_SUPPORT/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_ACCEPT4(?![A-Za-z0-9_])/EVENT__HAVE_ACCEPT4/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_ARC4RANDOM(?![A-Za-z0-9_])/EVENT__HAVE_ARC4RANDOM/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_ARC4RANDOM_BUF(?![A-Za-z0-9_])/EVENT__HAVE_ARC4RANDOM_BUF/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_ARPA_INET_H(?![A-Za-z0-9_])/EVENT__HAVE_ARPA_INET_H/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_CLOCK_GETTIME(?![A-Za-z0-9_])/EVENT__HAVE_CLOCK_GETTIME/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_DECL_CTL_KERN(?![A-Za-z0-9_])/EVENT__HAVE_DECL_CTL_KERN/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_DECL_KERN_ARND(?![A-Za-z0-9_])/EVENT__HAVE_DECL_KERN_ARND/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_DECL_KERN_RANDOM(?![A-Za-z0-9_])/EVENT__HAVE_DECL_KERN_RANDOM/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_DECL_RANDOM_UUID(?![A-Za-z0-9_])/EVENT__HAVE_DECL_RANDOM_UUID/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_DEVPOLL(?![A-Za-z0-9_])/EVENT__HAVE_DEVPOLL/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_DLFCN_H(?![A-Za-z0-9_])/EVENT__HAVE_DLFCN_H/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_EPOLL(?![A-Za-z0-9_])/EVENT__HAVE_EPOLL/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_EPOLL_CREATE1(?![A-Za-z0-9_])/EVENT__HAVE_EPOLL_CREATE1/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_EPOLL_CTL(?![A-Za-z0-9_])/EVENT__HAVE_EPOLL_CTL/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_EVENTFD(?![A-Za-z0-9_])/EVENT__HAVE_EVENTFD/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_EVENT_PORTS(?![A-Za-z0-9_])/EVENT__HAVE_EVENT_PORTS/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_FCNTL(?![A-Za-z0-9_])/EVENT__HAVE_FCNTL/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_FCNTL_H(?![A-Za-z0-9_])/EVENT__HAVE_FCNTL_H/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_FD_MASK(?![A-Za-z0-9_])/EVENT__HAVE_FD_MASK/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETADDRINFO(?![A-Za-z0-9_])/EVENT__HAVE_GETADDRINFO/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETEGID(?![A-Za-z0-9_])/EVENT__HAVE_GETEGID/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETEUID(?![A-Za-z0-9_])/EVENT__HAVE_GETEUID/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETHOSTBYNAME_R(?![A-Za-z0-9_])/EVENT__HAVE_GETHOSTBYNAME_R/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETHOSTBYNAME_R_3_ARG(?![A-Za-z0-9_])/EVENT__HAVE_GETHOSTBYNAME_R_3_ARG/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETHOSTBYNAME_R_5_ARG(?![A-Za-z0-9_])/EVENT__HAVE_GETHOSTBYNAME_R_5_ARG/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETHOSTBYNAME_R_6_ARG(?![A-Za-z0-9_])/EVENT__HAVE_GETHOSTBYNAME_R_6_ARG/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETIFADDRS(?![A-Za-z0-9_])/EVENT__HAVE_GETIFADDRS/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETNAMEINFO(?![A-Za-z0-9_])/EVENT__HAVE_GETNAMEINFO/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETPROTOBYNUMBER(?![A-Za-z0-9_])/EVENT__HAVE_GETPROTOBYNUMBER/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETSERVBYNAME(?![A-Za-z0-9_])/EVENT__HAVE_GETSERVBYNAME/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETTIMEOFDAY(?![A-Za-z0-9_])/EVENT__HAVE_GETTIMEOFDAY/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_IFADDRS_H(?![A-Za-z0-9_])/EVENT__HAVE_IFADDRS_H/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_INET_ATON(?![A-Za-z0-9_])/EVENT__HAVE_INET_ATON/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_INET_NTOP(?![A-Za-z0-9_])/EVENT__HAVE_INET_NTOP/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_INET_PTON(?![A-Za-z0-9_])/EVENT__HAVE_INET_PTON/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_INTTYPES_H(?![A-Za-z0-9_])/EVENT__HAVE_INTTYPES_H/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_ISSETUGID(?![A-Za-z0-9_])/EVENT__HAVE_ISSETUGID/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_KQUEUE(?![A-Za-z0-9_])/EVENT__HAVE_KQUEUE/g; s/(?<![A-Za-z0-9_])_EVENT_HAVE_LIBZ(?![A-Za-z0-9_])/EVENT__HAVE_LIBZ/g; 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Nick Mathewson a220a081 2012-02-15T21:07:44 Merge remote-tracking branch 'github/21_fast_syscalls'
Nick Mathewson a63ed161 2012-02-15T20:26:52 Merge remote-tracking branch 'origin/patches-2.0'
Nick Mathewson bec50680 2012-02-15T20:12:32 Stop crashing in evdns when nameserver probes give a weird error When a nameserver is down, we periodically try sending a "probe" message to that nameserver to see if it has come back up. If a nameserver comes up, we cancel any pending probe messages. Cancelling a probe message while handling the probe's response would result in a access-after-free or a double-free, so when we notice that we're about to call a nameserver up because of having received a probe from it, we need to check whether current response is the response from the probe. There was a case where we didn't to that, though: when the resolver gave us an unusual error response to our request that it resolve google.com. This is pretty rare, but apparently it can happen with some weird cacheing nameservers -- the one on the mikrotik router, for example. Without this patch, we would crash with a NULL pointer derefernce. Thanks to Hannes Sowa for finding this issue and helping me track it down.
Nick Mathewson 539466e5 2012-02-10T17:33:50 Merge remote-tracking branch 'origin/patches-2.0' Conflicts: Makefile.am WIN32-Code/event2/event-config.h configure.in
Nick Mathewson e49e2891 2012-02-10T17:29:53 Update copyright notices to 2012
Nick Mathewson 713e570a 2012-02-10T16:32:50 Save some syscalls when creating evdns sockets
Nick Mathewson 032aac15 2012-02-01T14:57:44 Merge remote-tracking branch 'origin/patches-2.0'
Nick Mathewson d6094b16 2012-02-01T14:56:43 evdns: fix a bug in circular-queue implementation found by Wang Qin
Nick Mathewson fc1a2514 2011-10-19T22:20:15 Merge remote-tracking branch 'origin/patches-2.0'
Leonid Evdokimov 21a08d68 2011-10-19T22:38:37 Empty DNS reply with OK status is another way to say NODATA. Sometimes DNS reply has nothing but query section. It does not look like error, so it should be treated as NODATA with TTL=0 as soon as there is no SOA record to deduce negative TTL from.
Nick Mathewson b3bc77b6 2011-10-03T12:54:35 Merge remote-tracking branch 'origin/patches-2.0'
Nick Mathewson 39c0cf7c 2011-10-03T12:49:02 Fix some "value never used" warnings with gcc 4.6.1
Nick Mathewson 38674d4a 2011-09-12T15:46:54 Merge remote-tracking branch 'origin/patches-2.0'
Leonid Evdokimov 94fba5b9 2011-08-10T15:58:47 Add DNS_ERR_NODATA error code to handle empty replies.
Nick Mathewson 804f77fb 2011-09-01T17:39:37 Merge remote-tracking branch 'origin/patches-2.0'
Leonid Evdokimov f72e8f66 2011-08-31T00:56:45 DNS: add ttl for negative answers using RFC 2308 idea.
Nick Mathewson d7451b05 2011-08-15T11:14:57 Merge remote-tracking branch 'origin/patches-2.0'
Leonid Evdokimov aff6ba15 2011-08-11T03:24:06 Fix request_finished memory leak with debugging turned on.
Nick Mathewson 9f560bfa 2011-05-25T19:50:56 Use "_WIN32", not WIN32: it's standard and we don't need to fake it This patch was automatically generated with perl. Based on a patch by Peter Rosin.
Nick Mathewson 9155b095 2011-05-25T16:52:50 Merge remote-tracking branch 'origin/patches-2.0'
Nick Mathewson 06a714ff 2011-05-25T16:51:25 Fix new warnings from GCC 4.6
Nick Mathewson a9fe47f0 2011-05-23T17:50:45 Merge remote-tracking branch 'origin/patches-2.0'
Nick Mathewson 74760f18 2011-05-23T17:45:14 Fix a bug that prevented us from configuring IPv6 nameservers.
Nick Mathewson 614a1712 2011-04-22T23:46:25 Merge remote-tracking branch 'origin/patches-2.0' Conflicts: evthread.c
Sebastian Hahn 5208544e 2011-03-14T04:24:33 Fix possible NULL-deref in evdns_cancel_request The clang static analyzer complained that base might be dereferenced without being set, but this patch should fix another dereference issue.
Nick Mathewson 34631be0 2011-04-21T17:36:30 Merge remote-tracking branch 'origin/patches-2.0'
Nick Mathewson 364291e9 2011-04-21T17:11:41 Handle calloc failure in evdns. (Found by Dave Hart)
Nick Mathewson 169eca7b 2011-04-21T13:38:29 Merge remote-tracking branch 'origin/patches-2.0'
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