The media frame cache gets in the way of finding use after free errors of
media frames.  Tools like valgrind and MALLOC_DEBUG don't know when a
frame is released because it gets put into the cache instead of being
freed.

* Added the "cache_media_frames" option to asterisk.conf.  Disabling the
option helps track down media frame mismanagement when using valgrind or
MALLOC_DEBUG.  The cache gets in the way of determining if the frame is
used after free and who freed it.  NOTE: This option has no effect when
Asterisk is compiled with the LOW_MEMORY compile time option enabled
because the cache code does not exist.

To disable the media frame cache simply disable the cache_media_frames
option in asterisk.conf and restart Asterisk.

Sample asterisk.conf setting:
[options]
cache_media_frames=no

ASTERISK-27413

Change-Id: I0ab2ce0f4547cccf2eb214901835c2d951b78c00

handle_quit has been disabled since 2003, remove it.

Change-Id: Idc3aaa6c81676160547078f9b71e8aa43de2db18

cdr_object_update_party_b_userfield_cb() could overrun the fixed buffer if
the supplied string is too long.  The long string could be supplied by
external means using the CDR(userfield) function.

This may seem reminiscent to AST-2017-001 (ASTERISK_26897) and it is.  The
earlier patch fixed the buffer overrun for Party A's userfield while this
patch fixes the same thing for Party B's userfield.

ASTERISK-27337

Change-Id: I0fa767f65ecec7e676ca465306ff9e0edbf3b652

Change-Id: I84a83ae69daba5d185cc1d939b133a4c23565497

ast_stream_topology_set_stream had suppressed error codes from
AST_VECTOR_APPEND.  The result of AST_VECTOR_APPEND needs to be returned
to the caller so they can take appropriate action on the stream.

Change-Id: I6c0d12755743eadba1357f6153526cc055592856

Change-Id: I3e5cc669169aab6175ddfaf7486edeaeb4fdcfb1

Check for errors from AST_VECTOR_REPLACE and clean memory if needed.

Change-Id: I124d15cc1d645f85a72a1279f623c1993b304b0b

This resolves potentials leaks on AST_VECTOR_APPEND error in:
* ast_context_add_include2
* ast_context_add_switch2
* ast_context_add_ignorepat2

Change-Id: Ib60e95c4f622fa3b832d87227c0523a695d736b6

Message tech and handler registrations use a vector which could fail to
expand.  If it does log and error and return error.

Change-Id: I593a8de81a07fb0452e9b0efd5d4018b77bca6f4

format_cap_framed_init can fail on AST_VECTOR_APPEND.  This should
report failure to the caller and clean the newly allocated frame.

Change-Id: Ica0661235bf09497bf23d844ceb01f21b41a55b0

Change-Id: I46de4c968d40144d5b049966304ff66c1469fb65

The internal CLI command "_command complete" was last used by Asterisk
0.2.0.  Since then we've been using "_command nummatches" and "_command
matchesarray".

Change-Id: I682fe1e21a24a3bb5bd04146e639f1c5866bcfce

Change-Id: Ib1181a36b317c86bff1ef2e44a17a0b1c73cfdc8

Change-Id: I28b458b3c1a442c4ef0be7b4986a95ea4149e14f

When (v)asprintf() fails, the state of the allocated buffer is undefined.
The library had better not leave an allocated buffer as a result or no one
will know to free it.  The most likely way it can return failure is for an
allocation failure.  If the printf conversion fails then you actually have
a threading problem which is much worse because another thread modified
the parameter values.

* Made __ast_asprintf()/__ast_vasprintf() set the returned buffer to NULL
on failure.  That is much more useful than either an uninitialized pointer
or a pointer that has already been freed.  Many uses won't have to check
for failure to ensure that the buffer won't be double freed or prevent an
attempt to free an uninitialized pointer.

* stasis.c: Fixed memory leak in multi_object_blob_to_ami() allocated by
ast_asprintf().

* ari/resource_bridges.c:ari_bridges_play_helper(): Remove assignment to
the wrong thing which is now not needed even if assigning to the right
thing.

Change-Id: Ib5252fb8850ecf0f78ed0ee2ca0796bda7e91c23

This mimics the behavior of Chrome and Firefox and creates an ephemeral
X.509 certificate for each DTLS session.

Currently, the only supported key type is ECDSA because of its faster
generation time, but other key types can be added in the future as
necessary.

ASTERISK-27395

Change-Id: I5122e5f4b83c6320cc17407a187fcf491daf30b4

Asterisk can be compiled without a SSL/TLS library, without the Development
Headers of OpenSSL. However, if TLS (SIP) or Secure-WebSockets (WebRTC) was
enabled in a configuration file, Asterisk did not notice the user. Asterisk
failed silently, only the corresponding TCP ports were not open.

ASTERISK-27394
Reported-by: mossley74

Change-Id: Ib8b7539a5b2af8154c22e5f7a40fc68f95d95b93

Change-Id: Id569c624c426e3b22a99936473c730592d8b83fb

Change-Id: I3a1d40a41a8a7d00fa4a187de6a343a79155d3ef

We use the editline library to help with filename completion in our CLI
interface.  Some systems failed to find the header when included from
loader.c.  This is fixed by setting the proper CFLAGS for the build of
loader.o.

ASTERISK-27378

Change-Id: Ib7fd496f1d7ed48141a2eadd5dd61cab2f2308be

When a frame is provided to ast_write ensure that a multistream
capable channel has a stream for it before attempting to give it
to the channel driver. In some cases (such as a deferred SDP
negotiation) the stream may not yet exist.

ASTERISK-27364

Change-Id: Icf84ca982a67cdd6e9a71851eb7eb1bd0e865276

Replace 'needsreload' argument with a 'type' argument to specify which
type of modules you want completion.  This provides more accurate CLI
completion for load and unload commands.

* 'module unload' now excludes modules that have active references or are
  not running.
* 'module load' now excludes modules that are already running.
* 'core set debug [atleast] <level> [module]' shows running modules only.

ASTERISK-27378

Change-Id: Iea3e00054461484196c46f688f02635cc886bad1

The dialplan application "Bridge" was not setting the BRIDGERESULT to failure
when a failure did occur. Even worse if it did fail to join the bridge it would
still report success.

This patch now sets the BRIDGERESULT variable to an appropriate value for a
given condition state. Also, removed the value INCOMPATIBLE as a valid result
type since it is no longer used.

ASTERISK-27369 #close

Change-Id: I22588e7125a765edf35cff28c98ca143e9927554

In WebRTC streams (or media tracks in their world) can be grouped
together using the mslabel. This informs the browser that each
should be synchronized with each other.

This change extends the stream API so this information can
be stored with streams. The PJSIP support has been extended
to use the mslabel to determine grouped streams and store
this association on the streams. Finally when creating the
SDP the group information is used to cause each media stream
to use the same mslabel.

ASTERISK-27379

Change-Id: Id6299aa031efe46254edbdc7973c534d54d641ad

* Stop using ast_module_helper to check if a module is loaded, use
  ast_module_check instead (app_confbridge and app_meetme).
* Stop ast_module_helper from listing reload classes when needsreload
  was not requested.

ASTERISK-27378

Change-Id: Iaed8c1e4fcbeb242921dbac7929a0fe75ff4b239

Earlier versions of the codec_opus samples_count callback can return
negative error values on undecodable frames.  This resulted in a divide by
zero exception.

* Added a defensive check in ast_codec_samples_count() for a "negative"
samples count return value.  Log the event and set the count to zero.

ASTERISK-27194

Change-Id: Icf69350307ecbbc80a3d74de46af9bd80ea17819

Currently ast_http_send barricades a portion of the content that
needs to be sent in order to establish a connection for things
like the ARI client. The conditional and contents have been changed
to ensure that everything that needs to be sent, will be sent.

ASTERISK-27372

Change-Id: I8816d2d8f80f4fefc6dcae4b5fdfc97f1e46496d

The configure option to disable XML documentation does not currently
work.  This patch makes it effective, but also causes an ABI change by
removing the ast_xmldoc_* symbols.  Disabling xmldoc also prevents docs
from being automatically generated, but they can still be manually
generated with 'make doc/core-en_US.xml'.

ASTERISK-26639

Change-Id: Ifac562340c09f80c83e0203de098fcac93bf8c44

This makes the 'bt' parameter unconditional for ast_store_lock_info and
ast_remove_lock_info.  The 'bt' parameter is unused when HAVE_BKTR is
undefined.

Change-Id: Ieced0e920928b735a39c3b5952b806c473d67453

A few places in hashtab use free instead of ast_free, remove declaration
of ASTMM_LIBC from hashtab.c as it's no longer needed.

Change-Id: I2ff089bad71640c03c3ce97f1b00fc962ef79427

Change-Id: Ibb3e47f27a395d74d8c5263db015b05434f5969b

* Rename the Party A CDR container from active_cdrs_by_channel to
active_cdrs_master.

* Renamed the support functions associated with active_cdrs_master
appropriately.

ASTERISK-27335

Change-Id: I6104bb3edc3a0b7243ce502e45e8832b0cff14f7

The CDR performance gets worse the further it gets behind in processing
stasis messages.  One of the reasons is because of a n*m loop used when
processing Party B information.

* Added a new CDR container that is keyed to Party B so we don't need such
a large loop when processing Party B information.

NOTE: To reduce the size of the patch I deferred to another patch the
renaming of the Party A active_cdrs_by_channel container to
active_cdrs_master and renaming the container's hash and cmp functions
appropriately.

ASTERISK-27335

Change-Id: I0bf66e8868f8adaa4b5dcf9e682e34951c350249

It's possible for bfdobj to be created but syms not created.  If syms
was not allocated in the current loop iteration but was allocated in the
previous iteration it would crash.

ASTERISK-27340

Change-Id: I5b110c609f6dfe91339f782a99a431bca5837363

This avoids a crash on stopping a chan_sip which failed to start its TLS server.

ASTERISK-27339 #close

Change-Id: I327fc70db68eaaca5b50a15c7fd687fde79263d5

The CDR performance gets worse the further it gets behind in processing
stasis messages.  One of the reasons is we were getting the global config
to determine if we needed to log a debugging message.

* Many calls to ao2_global_obj_ref() were just so we could determine if
debug mode is enabled.  Made a global flag to check instead.

* Eliminated many RAII_VAR() usages associated with the remaining
ao2_global_obj_ref() calls.

* Added missing NULL checks for the returned ao2_global_obj_ref() value.

ASTERISK-27335

Change-Id: Iceaad93172862f610cad0188956634187bfcc7cd

The CDR performance gets worse the further it gets behind in processing
stasis messages.  One of the reasons is we were getting the global config
even if we didn't need it.

* Most uses of the global config were only needed on off nominal code
paths so it makes sense to not get it until absolutely needed.

ASTERISK-27335

Change-Id: I00c63b7ec233e5bfffd5d976f05568613d3c2365

The CDR performance gets worse the further it gets behind in processing
stasis messages.  One of the reasons is we were repeatedly setting string
fields to potentially the same string in base_process_party_a().  Setting
a string field involves allocating room for the new string out of a memory
pool which may have to allocate even more memory.

* Check to see if the string field is already set to the desired string.

ASTERISK-27335

Change-Id: I3ccb7e23f1488417e08cafe477755033eed65a7c

The string comparisons for setting these CDR variables was inverted.  We
were repeatedly setting these CDR variables only if the channel snapshots
had the same value.

ASTERISK-27335

Change-Id: I9482073524411e7ea6c03805b16de200cb1669ea

Add action to cancel feature attended transfer with AMI interface

ASTERISK-27215 #close

Change-Id: Iab8a81362b5a1757e2608f70b014ef863200cb42