cmake: Fix detection of ssize_t/SSIZE_T

Since ssize_it is POSIX, windows/VS also have this but with BaseTsd.h, plus the
logic prefers "ssize_t" (lower) instead of "SSIZE_T" (upper) when the latest
only available -- fix this too.

Refs: #311

test/regress: cover event_del() waiting mechanism

Since we have some issues (see refs) for changing waiting order in event_del()
I wrote this simple test, so maybe this test can explain something or at least
cover what we have before and show it will be broken.

P.S. we really need avoid such stuff like lets-test-with-sleep/usleep.

Refs: #225
Refs: #226
Refs: #236

Ignore more configure stuff (configure.lineno)

Link: https://lists.gnu.org/archive/html/autoconf/2004-01/msg00043.html

Merge branch 'event_reinit-for-signals-v3'

* event_reinit-for-signals-v3:
  test/regress: cover existing signal callbacks and fork() + event_reinit()
  test/regress: cover signals after fork() + event_reinit()
  test/regress: main/fork: rewrite assertions by just removing event in callback
  event_reinit: make signals works after fork() without evsig_add()
  event_reinit: always re-init signal's socketpair

Fixes #307

test/regress: cover existing signal callbacks and fork() + event_reinit()

Regression-for: 88640aa ("event_reinit: make signals works after fork() without
evsig_add()")

test/regress: cover signals after fork() + event_reinit()

Regression-for: ad0c237 ("event_reinit: always re-init signal's socketpair")

test/regress: main/fork: rewrite assertions by just removing event in callback

Instead of assigning some variable value (got_child), and schedule exit from
loop from that callback, just remove event for that signal, and event loop will
exit automatically when there will be no events.

event_reinit: make signals works after fork() without evsig_add()

event_reinit() removes the event, but only evsig_add puts it back. So any
signals set up before event_reinit will be ignored until another signal is
added.

Fixes: #307

event_reinit: always re-init signal's socketpair

Before this patch event_reinit() only closes the signal socketpair fds and
recreates them if signals have been added, but this is wrong, since socketpair
fds created on backend init, and if we will not re-create them bad things in
child/parent signal handling will happens (and indeed this is what happens for
non-reinit backends like select).

Fixes: #307

Update README.md

Fixed issue with cmake version generation

Merge pull request #125 from libevent/master

update upstream

Merge pull request #305 from libevent/cmake_updates

CMake updates that fix things I thought I fixed.

Cmake is now officially working.

Though I am currently breaking out things that seem to be repetitive, and a
cooler version macro and changelog updater.

More to come.

More cmake updates, lot's of missing definitions

Merge pull request #300 from ellzey/cmake_updates

Cmake updates

CMake syntax fixes fo .in files

Merge pull request #299 from libevent/revert-297-master

Revert "The Windows socket type is defined as SOCKET."

Revert "The Windows socket type is defined as SOCKET."

CMAKE CMAKE CMAKE CLEANUPS

It's almost useful.

Lot's of cmake updates

This is still not done, cmake here was a horrid mess, but we're
getting our act together now.

Merge pull request #297 from billsegall/master

The Windows socket type is defined as SOCKET.

Provide a mechanism for building the library on Windows with different compiler flags. Add a batch file that builds it for the M[DT][d] options and performs a hunt and gather of the different output libraries.

The Windows socket type is defined as SOCKET.

Under the hood it's an unsigned rather than a signed type and whilst C
compilers are largely happy with this C++ compilers tend to be fussy
about class function signatures which makes C++ usage of libevent
problematic.

Merge pull request #296 from lzmths/master

Refactoring conditional directives that break parts of statements.

Merge pull request #289 from mc-server/UnicodeErrMsgFix

Fixed Unicode issue in error messages.

Refactoring conditional directives that break parts of statements.

Fixed Unicode issue in error messages.

be_sock: bufferevent_socket_connect_hostname(): make it thread-safe

If you use bufferevent_socket_connect_hostname() to resolve, then ipv4 answer
can be returned before ipv6 scheduled and if you will destroy bufferevent after
ipv4 answer will come (in a separate thread of course) then ipv6 will trigger
UAF:

$ a.out
=================================================================
==29733==ERROR: AddressSanitizer: heap-use-after-free on address 0x60200000ef50 at pc 0x0000004b7aef bp 0x7fffffffd940 sp 0x7fffffffd0f8
READ of size 2 at 0x60200000ef50 thread T0
    #0 0x4b7aee in __interceptor_index (/src/oss/libevent/libevent-github/.invest/217-evhttp-threaded/a.out+0x4b7aee)
    #1 0x5060eb in string_num_dots /src/oss/libevent/libevent-github/.cmake-debug/../evdns.c:2739
    #2 0x5078df in search_request_new /src/oss/libevent/libevent-github/.cmake-debug/../evdns.c:3214
    #3 0x506afd in evdns_base_resolve_ipv6 /src/oss/libevent/libevent-github/.cmake-debug/../evdns.c:2935
    #4 0x50aa94 in evdns_getaddrinfo /src/oss/libevent/libevent-github/.cmake-debug/../evdns.c:4719
    #5 0x51de4f in evutil_getaddrinfo_async_ /src/oss/libevent/libevent-github/.cmake-debug/../evutil.c:1567
    #6 0x4fe023 in bufferevent_socket_connect_hostname /src/oss/libevent/libevent-github/.cmake-debug/../bufferevent_sock.c:519
    #7 0x524f54 in evhttp_connection_connect_ /src/oss/libevent/libevent-github/.cmake-debug/../http.c:2493
    #8 0x525156 in evhttp_make_request /src/oss/libevent/libevent-github/.cmake-debug/../http.c:2548
    #9 0x52d373 in main (/src/oss/libevent/libevent-github/.invest/217-evhttp-threaded/a.out+0x52d373)
    #10 0x7ffff6849b44 in __libc_start_main /tmp/buildd/glibc-2.19/csu/libc-start.c:287
    #11 0x445806 in _start (/src/oss/libevent/libevent-github/.invest/217-evhttp-threaded/a.out+0x445806)

0x60200000ef50 is located 0 bytes inside of 15-byte region [0x60200000ef50,0x60200000ef5f)
freed by thread T1 here:
    #0 0x4cc4f2 in __interceptor_free (/src/oss/libevent/libevent-github/.invest/217-evhttp-threaded/a.out+0x4cc4f2)
    #1 0x5141c1 in event_mm_free_ /src/oss/libevent/libevent-github/.cmake-debug/../event.c:3512
    #2 0x522402 in evhttp_connection_free /src/oss/libevent/libevent-github/.cmake-debug/../http.c:1206
    #3 0x52cc5f in connection_closer (/src/oss/libevent/libevent-github/.invest/217-evhttp-threaded/a.out+0x52cc5f)
    #4 0x50e80e in event_process_active_single_queue /src/oss/libevent/libevent-github/.cmake-debug/../event.c:1642
    #5 0x50ed57 in event_process_active /src/oss/libevent/libevent-github/.cmake-debug/../event.c:1734
    #6 0x50f458 in event_base_loop /src/oss/libevent/libevent-github/.cmake-debug/../event.c:1957
    #7 0x50eddf in event_base_dispatch /src/oss/libevent/libevent-github/.cmake-debug/../event.c:1768
    #8 0x52d075 in event_dispatch_thread (/src/oss/libevent/libevent-github/.invest/217-evhttp-threaded/a.out+0x52d075)
    #9 0x7ffff74fc0a3 in start_thread /tmp/buildd/glibc-2.19/nptl/pthread_create.c:309

Fixes: #217
Closes: #222
Closes: #219
Gist: https://gist.github.com/azat/92cbb34232ac02d7972b (from #217 but thread-safe)

autotools: fix getservbyname() detection

The mentioned commit adds this check under-the-else of the previous condition
between getaddrinfo()/gethostbyname_r(), so this check is triggered only when
we don't have getaddrinfo() which is wrong, fix this by move it upper.

Fixes [CI] since it uses getservbyname() and it failed with autotools only
(cmake detection is ok).

CI: https://travis-ci.org/libevent/libevent/builds/93125954
Fixes: af08a94085e49e6942835b4c6b50a774536d5b5b ("Check for getservbyname even
if not on win32.")

test/dns: check exit code of evdns_getaddrinfo()

By some reason all autotools builds failed:
CI: https://travis-ci.org/libevent/libevent/builds/93125954

Merge branch 'evdns-fail-requests-v6'

This patchset fixes some issues wit evdns_base_free(..., fail_requests=1), and
there are two cases: with callback wrapper for evdns_getaddrinfo() and not,
both fixed by this patches, and adds regression tests for this.

* evdns-fail-requests-v6:
  evdns: evdns_base_free(): fix UAF of evdns_base with @fail_requests
  test/dns: cover evdns_getaddrinfo() and evdns_base_free() with @fail_requests
  evdns: evdns_base_free(): free requests before namservers
  test/dns: cover @fail_requests for evdns_base_free()
  test/dns: more graceful coverage of @fail_requests

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

test/dns: cover evdns_getaddrinfo() and evdns_base_free() with @fail_requests

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

test/dns: cover @fail_requests for evdns_base_free()

test/dns: more graceful coverage of @fail_requests

In case when evdns_base_free() called with @fail_requests, we can potentially
have leaks, but we can avoid them if we will run event loop once again to
trigger defer cbs, so let's do this, instead of magical decrements (and also
this will give an example how to avoid leaks for evdns).

sample/https-client: allow to change path to ca-certificates

And default to one that linux have, for freebsd you will need:
$ https-client -url https://google.com -crt /usr/local/share/certs/ca-root-nss.crt

sample/https-client: check for ERR_remove_thread_state() existence

Fixes: freebsd 9.2 build

http: avoid epoll_ctl() on already closed fd (triggers by http/chunk_out)

Before:
$ strace -eepoll_ctl,close regress --verbose --no-fork +http/chunk_out
close(3)                                = 0
close(3)                                = 0
close(3)                                = 0
close(3)                                = 0
close(3)                                = 0
close(3)                                = 0
close(3)                                = 0
close(3)                                = 0
http/chunk_out: epoll_ctl(5, EPOLL_CTL_ADD, 8, {EPOLLIN, {u32=8, u64=8}}) = 0
close(10)                               = 0
close(9)                                = 0
epoll_ctl(5, EPOLL_CTL_ADD, 9, {EPOLLIN, {u32=9, u64=9}}) = 0
epoll_ctl(5, EPOLL_CTL_ADD, 10, {EPOLLOUT, {u32=10, u64=10}}) = 0
epoll_ctl(5, EPOLL_CTL_ADD, 11, {EPOLLIN, {u32=11, u64=11}}) = 0
epoll_ctl(5, EPOLL_CTL_DEL, 10, 7ffffb10b870) = 0
epoll_ctl(5, EPOLL_CTL_ADD, 10, {EPOLLIN, {u32=10, u64=10}}) = 0
close(12)                               = 0
epoll_ctl(5, EPOLL_CTL_MOD, 11, {EPOLLIN|EPOLLOUT, {u32=11, u64=11}}) = 0
epoll_ctl(5, EPOLL_CTL_MOD, 11, {EPOLLIN, {u32=11, u64=11}}) = 0
close(11)                               = 0
epoll_ctl(5, EPOLL_CTL_DEL, 11, 7ffffb10b770) = -1 EBADF (Bad file descriptor)
...

And trace for latest:
close(11)                               = 0
 > regress(evutil_closesocket+0x15) [0xadac4]
 > regress(evhttp_connection_free+0x19d) [0xbada2]
 > regress(evhttp_send_done+0x14d) [0xbde43]
 > regress(evhttp_write_cb+0x4a) [0xba1a1]
 > regress(bufferevent_run_writecb_+0xa2) [0x97bba]
 > regress(bufferevent_trigger_nolock_+0xb1) [0x9e330]
 > regress(bufferevent_writecb+0x2a3) [0x9e91a]
 > regress(event_persist_closure+0x2bb) [0xa2e09]
 > regress(event_process_active_single_queue+0x2a8) [0xa30b4]
 > regress(event_process_active+0x13f) [0xa3696]
 > regress(event_base_loop+0x2ab) [0xa3d97]
 > regress(event_base_dispatch+0x1d) [0xa371e]
 > regress(http_chunk_out_test_impl+0x132) [0x74940]
epoll_ctl(5, EPOLL_CTL_DEL, 11, 7fff09439fe0) = -1 EBADF (Bad file descriptor)
 > regress(epoll_ctl+0x36) [0xb49a3]
 > regress(epoll_apply_one_change+0x14e) [0xb4cd4]
 > regress(epoll_nochangelist_del+0x87) [0xb51e4]
 > regress(evmap_io_del_+0x247) [0xaab04]
 > regress(event_del_nolock_+0x2f7) [0xa6aa8]
 > regress(event_callback_cancel_nolock_+0x6e) [0xa747e]
 > regress(event_callback_finalize_many_+0xeb) [0xa4dd6]
 > regress(bufferevent_decref_and_unlock_+0x21d) [0x98da7]
 > regress(bufferevent_writecb+0x312) [0x9e989]
 > regress(event_persist_closure+0x2bb) [0xa2e09]
 > regress(event_process_active_single_queue+0x2a8) [0xa30b4]
 > regress(event_process_active+0x13f) [0xa3696]
 > regress(event_base_loop+0x2ab) [0xa3d97]
 > regress(event_base_dispatch+0x1d) [0xa371e]
 > regress(http_chunk_out_test_impl+0x132) [0x74940]
 ...

http: install timeout for read too during connect for ssl

Since during ssl handshake we can read too, and if something nasty will happens
during this handshake (because of too many events in the loop of something like
this) we can wait forever since there is no read timeout:
  (gdb) p *$2.task.connection.bufev
  $11 = {
    ...
    be_ops = 0x7f78c2864b00 <bufferevent_ops_openssl>,
    ev_read = {
      ...
      ev_ = {
        ev_io = {
          ...
          ev_timeout = { tv_sec = 0, tv_usec = 0 }
        },
        ev_signal = { ... }
      },
      ev_events = 82, ev_res = 2,
      ev_timeout = { tv_sec = 10889976, tv_usec = 418753 }
    },
    ev_write = {
      ...
      ev_ = {
        ev_io = {
          ...
          ev_timeout = { tv_sec = 20, tv_usec = 0 }
        },
        ev_signal = { ... }
      },
      ev_events = 84, ev_res = 4,
      ev_timeout = { tv_sec = 10889977, tv_usec = 598753 }
    },
    ...
    errorcb = 0x7f78c287de70 <evhttp_connection_cb>,
    ...
    timeout_read = { tv_sec = 0, tv_usec = 0 },
    timeout_write = { tv_sec = 20, tv_usec = 0 },
    enabled = 4
  }
  (gdb) bt
  #0  0x00007f78c17c3633 in __epoll_wait_nocancel () at syscall-template.S:81
  #1  0x00007f78c2aaf508 in epoll_dispatch (base=0x18f76d0, tv=<optimized out>) at epoll.c:463
  ...

Found-with: massive crawling
Tested-with: massive crawling

test/ssl: cover busy-loop (i.e. {read,write}-blocked-on-{write,read} stuff)

This covers SSL_ERROR_WANT_READ/SSL_ERROR_WANT_WRITE error codes from ssl,
under which we must block read/write to avoid busy looping, and hence extra CPU
usage.
This test introduces custom BIO that will count read/write and validates
counters, with patches for be_openssl that drops handling
SSL/SSL_ERROR_WANT_READ there are more then 43K reads, so 100 is pretty ok.

test/http: write_during_read for https

test/http: connection_fail for https

test/http: stream_out for https

be_openssl: don't call do_write() directly from outbuf_cb

Otherwise we can trigger incorrect callback, the simplest way to trigger this
is using http regression tests -- https_chunk_out, since all it do is:
  evhttp_send_reply_end()
    evbuffer_add()
      do_write()
    evhttp_write_buffer()
      evcon->cb = cb

And indeed this is what happens:
  (gdb) bt
  #0  do_write (bev_ssl=0x738a90, atmost=16384) at bufferevent_openssl.c:717
  #1  0x00000000004b69f7 in consider_writing (bev_ssl=0x738a90) at bufferevent_openssl.c:875
  #2  0x00000000004b7386 in be_openssl_outbuf_cb (buf=0x7387b0, cbinfo=0x7fffffffd590, arg=0x738a90) at bufferevent_openssl.c:1147
  #3  0x0000000000490100 in evbuffer_run_callbacks (buffer=0x7387b0, running_deferred=0) at buffer.c:508
  #4  0x00000000004901e5 in evbuffer_invoke_callbacks_ (buffer=0x7387b0) at buffer.c:529
  #5  0x0000000000493a30 in evbuffer_add (buf=0x7387b0, data_in=0x4ecfb2, datlen=5) at buffer.c:1803
  #6  0x00000000004be2e3 in evhttp_send_reply_end (req=0x7371a0) at http.c:2794
  #7  0x000000000045c407 in http_chunked_trickle_cb (fd=-1, events=1, arg=0x75aaf0) at regress_http.c:402
  ...
  (gdb) p bev.writecb
  $4 = (bufferevent_data_cb) 0x4ba17e <evhttp_write_cb>
  $5 = (void *) 0x7379b0
  (gdb) p (struct evhttp_connection *)bev.cbarg
  $6 = (struct evhttp_connection *) 0x7379b0
  (gdb) p $6->cb
  $7 = (void (*)(struct evhttp_connection *, void *)) 0x0

And be_sock don't do like this anyway.

Fixes: https_chunk_out

test/http: chunk_out for https

epoll: introduce PRINT_CHANGES() macro to avoid copy-pasting

And also this will use change_to_string() for successfully returned
epoll_ctl()

sample/https-client: replace ERR_remove_state() by ERR_remove_thread_state()

Since ERR_remove_state() is deprecated:
  $ git log --grep ERR_remove_thread_state
  commit 2ecd2ededece66bf090fefc93ef3ddb672d9e71a
  Author: Bodo Möller <bodo@openssl.org>
  Date:   Wed Aug 13 19:30:01 2008 +0000

      Mention ERR_remove_state() deprecation, and ERR_remove_thread_state(NULL).

Link: https://www.openssl.org/docs/manmaster/crypto/ERR_remove_state.html

Add missing <string.h> for openssl_hostname_validation module

Now it included by openssl, but nfter
openssl/openssl@master-post-reformat-1494-g6329b60 it will print warning
(apparently they dropped <string.h> from the generic headers).

Merge branch 'be-openssl-more-common-with-be-sock'

* be-openssl-more-common-with-be-sock:
  be_openssl: use bufferevent_enable() instead of bufferevent_add_event_()
  be_sock: drop be_sock_add() macro (useless and debug unfriendly)
  be: introduce bufferevent_generic_adj_existing_timeouts_()
  be_openssl: don't add events during bev creation (like be_sock)
  be: add_event: use evutil_timerisset()

test/regress: fix ssl-less builds (need to make this prettier)

CI: https://travis-ci.org/libevent/libevent/jobs/89590839

be_openssl: use bufferevent_enable() instead of bufferevent_add_event_()

By using bufferevent_enable() there will be no event for READ *or* WRITE if
they are not enabled before, and this patch reduces difference for
be_sock_enable/be_openssl_enable (handshake)

be_sock: drop be_sock_add() macro (useless and debug unfriendly)

be: introduce bufferevent_generic_adj_existing_timeouts_()

And use it in openssl/sock layers to avoid copy-pasting it's variants.

be_openssl: don't add events during bev creation (like be_sock)

Using the following examples you can get changes between be_openssl and
be_sock:
$ function diff_addr()
{
    eval diff -u $(printf "<(strip_addr %s) " "$@")
}
$ function strip_addr()
{
    sed 's/0x[a-zA-Z0-9]*/0xFFFF/g' "$@"
}
$ EVENT_DEBUG_LOGGING_ALL= regress --verbose --no-fork +http/https_connection_retry 2> /tmp/https-retry.log >&2
$ EVENT_DEBUG_LOGGING_ALL= regress --verbose --no-fork +http/connection_retry 2> /tmp/http-retry.log >&2
$ diff_addr /tmp/http-retry.log /tmp/https-retry.log

be: add_event: use evutil_timerisset()

Merge branch 'https-coverage-v6'

This patchset adds some basic tests to cover some https cases:
$ regress +http/https_..
http/https_basic: [forking] OK
http/https_simple: [forking] OK
http/https_simple_dirty: [forking] OK
http/https_incomplete: [forking] OK
http/https_incomplete_timeout: [forking] OK
http/https_connection_retry: [forking] OK
http/https_connection_retry_conn_address: [forking] OK
7 tests ok.  (0 skipped)

But there are some leaks in http regression tests (like init_ssl() and others),
must be fixed by using custom setup routine.

* https-coverage-v6:
  test/http: allow dirty shutdown for ssl to fix https_incomplete
  test/http: https basic
  test/http: incomplete{,_timeout} for https
  test/http: add simplest test for http/https/https_dirty_shutdown
  test/http: https: retry coverage
  test/http: https server support (plus some helpers)
  test/http: more sanity checks
  test/ssl: export getkey()/getcert()/get_ssl_ctx()/init_ssl() for https

test/http: allow dirty shutdown for ssl to fix https_incomplete

test/http: https basic

test/http: incomplete{,_timeout} for https

test/http: add simplest test for http/https/https_dirty_shutdown

There is "basic" before, but it uses bufferevent's for creating requests for
http layer, while this test uses http layer for client requests too.

test/http: https: retry coverage

test/http: https server support (plus some helpers)

TODO:
- check BEV_OPT_DEFER_CALLBACKS separately

test/http: more sanity checks

test/ssl: export getkey()/getcert()/get_ssl_ctx()/init_ssl() for https

Fix lock leak in be_pair_flush() if flush type is BEV_NORMAL

Fixes: bufferevent/bufferevent_pair_flush_normal
  $ regress --no-fork bufferevent/bufferevent_pair_flush_normal
  bufferevent/bufferevent_pair_flush_normal:
    FAIL ../test/regress_bufferevent.c:181: assert(bufferevent_pair_get_partner(bev1) == NULL): 0x177fa20 vs (nil)
    [bufferevent_pair_flush_normal FAILED]

Fixes #266

test/regress_be: basic coverage bufferevent_flush() for pair/sock layers

Refs #266

test/regress_be: socket_filter_inactive: check bufferevent after creation

Fixes:
../test/regress_bufferevent.c: In function ‘test_bufferevent_socket_filter_inactive’:
../test/regress_bufferevent.c:1180:1: warning: label ‘end’ defined but not used [-Wunused-label]
 end:

Free event queues even for recursive finalizers

For finalizers we can register yet another finalizer out from finalizer, and
iff finalizer will be in active_later_queue we can add finalizer to
activequeues, and we will have events in activequeues after event_base_free()
returns, which is not what we want (we even have an assertion for this).

A simple case is bufferevent with underlying (i.e. filters) in inactive queue.

Fixes: regress bufferevent/bufferevent_socket_filter_inactive

test/regress_be: cover finalizers from inactive to active queue

Right now this will fail with the next assertion:
$ regress --no-fork --verbose bufferevent/bufferevent_socket_filter_inactive
bufferevent/bufferevent_socket_filter_inactive: [err] ../event.c:862: Assertion TAILQ_EMPTY(&base->activequeues[i]) failed in event_base_free_
Aborted

buffer_compat: fix comment -- we have EVBUFFER_EOL_ANY not EOL_STYLE_ANY

test/regress_buffer: fix clang compilation warnings

  ../test/regress_buffer.c:201:12: warning: logical not is only applied to the left hand side of this comparison [-Wlogical-not-parentheses]
          tt_assert(!memcmp((char*)EVBUFFER_DATA(evb), "1/hello", 7) != 0);

test/regress_http: fix compilation warnings (-Wmissing-field-initializers)

test/regress_dns: fix compilation warnings (-Wmissing-field-initializers/for)

I don't have an error for loop because gcc5 have --std=gnu11 by default.
We need some options-consistency for all versions/compilers and build systems
to avoid such patches.

Fixes: https://travis-ci.org/libevent/libevent/jobs/84403473
Fixes: https://travis-ci.org/libevent/libevent/builds/84403463

Merge branch 'evdns-randomization'

* evdns-randomization:
  evdns: fix randomize-case by make case-insensitive as required
  tests/regress_dns: cover that randomize-case works case-insensitive
  evnds: inline TEST_NAME macro to make debuggin easier

Fixes #288

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

tests/regress_dns: cover that randomize-case works case-insensitive

Regression-for: #288

evnds: inline TEST_NAME macro to make debuggin easier

make test/regress_ssl.c compile without warnings

evthread: fix evthread_setup_global_lock_() for debug-lock with a real-lock case

Sample bt:
  (gdb) bt
  #0  0x00000000004a95d2 in evthread_setup_global_lock_ (lock_=0x0, locktype=0, enable_locks=1)
  #1  0x00000000004afbc7 in evsig_global_setup_locks_ (enable_locks=1) at signal.c:475
  #2  0x00000000004a5da8 in event_global_setup_locks_ (enable_locks=1) at event.c:3838
  #3  0x00000000004a8983 in evthread_set_lock_callbacks (cbs=0x7fffffffdde0) at evthread.c:129
  #4  0x0000000000445a8f in use_lock_unlock_profiler () at regress_bufferevent.c:306
  #5  0x0000000000445af2 in test_bufferevent_pair_release_lock (arg=0x70e710) at regress_bufferevent.c:327
  #6  0x000000000048c9a8 in testcase_run_bare_ (testcase=0x6fdc10 <bufferevent_testcases+80>) at tinytest.c:105
  #7  0x000000000048cc8a in testcase_run_one (group=0x6ff270 <testgroups+112>, testcase=0x6fdc10 <bufferevent_testcases+80>) at tinytest.c:252
  #8  0x000000000048d5c9 in tinytest_main (c=3, v=0x7fffffffe008, groups=0x6ff200 <testgroups>) at tinytest.c:434
  #9  0x000000000047a08f in main (argc=3, argv=0x7fffffffe008) at regress_main.c:459

Found-with: regress bufferevent/bufferevent_pair_release_lock (-DEVENT__DISABLE_DEBUG_MODE=ON)

Fix checking for make_base_notifiable()

Fixes: a068f2e5 ("event_debug_created_threadable_ctx_: fix compilation without
debug mode")
Found-after: 3e56da23 ("travis: add builds without debug mode into matrix")

test/regress_be: drop debug __asm__(int3) to fix arm build

Closes #284

travis: add builds without debug mode into matrix

To cover compilation with this flag, since brew for example uses it by default.

event_debug_created_threadable_ctx_: fix compilation without debug mode

The following command failed before:
$ ./configure --disable-debug-mode

Fixes: dcfb19a27b7760299bc9e7291c9abd88c59fd91a ("Debug mode option to error on
evthread init AFTER other event calls.")

test: fix bufferevent/bufferevent_pair_release_lock in debug mode

After this test had been fixed for freebsd the debug build was broken because
we can't call evthread_set_lock_callbacks() when something already initialized,
and we can't call event_base_free() (in kqueue case) when it is initialized,
because of "held_by", but this only playing role during freeing lock profiler
so reset lock callbacks there before and this will fix both.

Fixes: 79f9ace4ae8a259a5cf1b4ff3869078b60ff16a1 ("test: fix
bufferevent/bufferevent_pair_release_lock for freebsd")

P.S. after this patch 'make verify' finishes without errors on freebsd.

test: fix bufferevent/bufferevent_pair_release_lock for freebsd

On FreeBSD with kqueue there is a call to evthread_debug_lock_mark_unlocked()
during event_base_free(), that will fail with an assert because of unmatched
"held_by", fix this by reseting lock callbacks to NULL before
event_base_free().

Trace:
  bufferevent/bufferevent_pair_release_lock: [warn] Trying to disable lock functions after they have been set up will probaby not work.
  [warn] Trying to disable lock functions after they have been set up will probaby not work.

    FAIL libevent/test/regress_bufferevent.c:259: lock: lock error[err] libevent/evthread.c:277: Assertion lock->held_by == me failed in evthread_debug_lock_mark_unlocked
  [New Thread 802006400 (LWP 100070/regress)]

  Program received signal SIGABRT, Aborted.
  [Switching to Thread 802006400 (LWP 100070/regress)]
  0x000000080167d6ca in thr_kill () from /lib/libc.so.7
  (gdb) bt
  #0  0x000000080167d6ca in thr_kill () from /lib/libc.so.7
  #1  0x0000000801752149 in abort () from /lib/libc.so.7
  #2  0x00000000004dff44 in event_exit (errcode=-559030611) at libevent/log.c:105
  #3  0x00000000004e053c in event_errx (eval=-559030611, fmt=0x5182cc "%s:%d: Assertion %s failed in %s") at libevent/log.c:162
  #4  0x00000000004d9954 in evthread_debug_lock_mark_unlocked (mode=0, lock=0x802017060) at libevent/evthread.c:277
  #5  0x00000000004d909a in debug_lock_unlock (mode=0, lock_=0x802017060) at libevent/evthread.c:290
  #6  0x00000000004e132c in evsig_dealloc_ (base=0x80201e300) at libevent/signal.c:434
  #7  0x00000000004e36c1 in kq_dealloc (base=0x80201e300) at libevent/kqueue.c:435
  #8  0x00000000004c9a44 in event_base_free_ (base=0x80201e300, run_finalizers=1) at libevent/event.c:855
  #9  0x00000000004c931a in event_base_free (base=0x0) at libevent/event.c:887
  #10 0x0000000000452657 in lock_unlock_free_thread_cbs () at libevent/test/regress_bufferevent.c:279
  #11 0x0000000000452621 in free_lock_unlock_profiler (data=0x8020170a0) at libevent/test/regress_bufferevent.c:317
  #12 0x000000000044bc8f in test_bufferevent_pair_release_lock (arg=0x8020170a0) at libevent/test/regress_bufferevent.c:334
  #13 0x00000000004b2288 in testcase_run_bare_ (testcase=0x737660) at libevent/test/tinytest.c:105
  #14 0x00000000004b1e72 in testcase_run_one (group=0x738c90, testcase=0x737660) at libevent/test/tinytest.c:252
  #15 0x00000000004b2930 in tinytest_main (c=3, v=0x7fffffffead0, groups=0x738c20) at libevent/test/tinytest.c:434
  #16 0x00000000004982fe in main (argc=3, argv=0x7fffffffead0) at libevent/test/regress_main.c:459
  (gdb) f 4
  #4  0x00000000004d9954 in evthread_debug_lock_mark_unlocked (mode=0, lock=0x802017060) at libevent/evthread.c:277
  277                     EVUTIL_ASSERT(lock->held_by == me);
  Current language:  auto; currently minimal
  (gdb) p lock
  $1 = (struct debug_lock *) 0x802017060
  (gdb) p lock->held_by
  $2 = 0
  (gdb) p me
  $3 = 34393318400

Merge branch 'cloudabi-fixes-pr-278'

Rebased version of #278

* cloudabi-fixes-pr-278:
  Assume that ke_udata is an integer type on CloudABI.
  Add missing include of <netinet/in.h>.
  Include <sys/ioctl.h>, <sys/resource.h> and <sys/wait.h> optionally.

Assume that ke_udata is an integer type on CloudABI.

Add missing include of <netinet/in.h>.

POSIX states that sockaddr_in6 should be declared in <netinet/in.h>. By
including this header, the code now builds on FreeBSD and CloudABI.

Include <sys/ioctl.h>, <sys/resource.h> and <sys/wait.h> optionally.

Though CloudABI implements a very large part of POSIX, it does not
provide these header files, for the reason that there is no raw device
access, no resource limiting and no access to the global process table
through wait().

It looks like these header files are not actually needed in theory.
There don't seem to be any constructs in these source files that use
these features, but I suspect they might still be required on some
systems.

Add a prototype for event_disable_debug_mode()

Exporting this function seems rather useless, as debugging mode has to
be enabled early and calling this function doesn't allow it to get
toggled back on later.

Fixes a compile warning when using clang 3.6.

Fixes #271
Fixes #224

http: export evhttp_connection_set_family()

Fixes #176

test/regress_be: bufferevent_enable() shouldn't call eventcb by it's own

It must enter the event loop regardless BEV_OPT_DEFER_CALLBACKS, to avoid
potential errors with subsequent connect(), you will find more info in #43,
since this is a regression for it.

test/regress_be: introduce fake_listener_create()

Merge branch 'evhttp-request-own-fixes'

I hope that I validated all places where evhttp_request_free() called and
ownership of request can be belong to user-specific code.

* evhttp-request-own-fixes:
  http: fix evhttp_request_own() by checking EVHTTP_USER_OWNED in more cases
  test/regress_http: cover evhttp_request_own()

Fixes #68

http: fix evhttp_request_own() by checking EVHTTP_USER_OWNED in more cases

Suggested-by: @ellzey
Fixes: http/request_own
Fixes: #68

test/regress_http: cover evhttp_request_own()

Merge branch 'http-server-EOF-at-read-v3'

This patchset fixes an issue with detecting EOF in http server and add some
regression tests to make sure that we will not break anything.

* http-server-EOF-at-read-v3:
  http: fix detecting EOF without write
  test/regress_http: cover write during read
  test/regress_http: verify that closecb will be called without multiple write

Closes #78
Link: http://stackoverflow.com/questions/18743948/libevent2-http-server-how-to-detect-client-close/18776728?noredirect=1#18776728

http: fix detecting EOF without write

Before this patch http server don't knows when client disconnected until it
will try to write to it, IOW to detect is client still alive you need to write
something to client socket, however it is not convenient since it requires to
store all clients somewhere and poll them periodically, and I don't see any
regressions if we will leave EV_READ always (like libevhtp do), since we
already reset read callback in evhttp_write_buffer() (see
http/write_during_read).

Also since we don't disable EV_READ anymore we don't need some enable EV_READ,
so we will reduce number of epoll_ctl() calls.

Covered-by: http/terminate_chunked_oneshot
Covered-by: http/write_during_read
Fixes: #78