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Matthew Jordan 5996dd6a23 Prevent exhaustion of system resources through exploitation of event cache ... Asterisk maintains an internal cache for devices in the event subsystem. The device state cache holds the state of each device known to Asterisk, such that consumers of device state information can query for the last known state for a particular device, even if it is not part of an active call. The concept of a device in Asterisk can include entities that do not have a physical representation. One way that this occurred was when anonymous calls are allowed in Asterisk. A device was automatically created and stored in the cache for each anonymous call that occurred; this was possible in the SIP and IAX2 channel drivers and through channel drivers that utilized the res_jabber/res_xmpp resource modules (Gtalk, Jingle, and Motif). These devices are never removed from the system, allowing anonymous calls to potentially exhaust a system's resources. This patch changes the event cache subsystem and device state management to no longer cache devices that are not associated with a physical entity. (issue ASTERISK-20175) Reported by: Russell Bryant, Leif Madsen, Joshua Colp Tested by: kmoore patches: event-cachability-3.diff uploaded by jcolp (license 5000) git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@378303 65c4cc65-6c06-0410-ace0-fbb531ad65f3		12 years ago
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Makefile	One of the changes in 1.6.1 was to allow app_directory to use functionality	16 years ago
app_adsiprog.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_alarmreceiver.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_amd.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_authenticate.c	Fix crash during CDR update.	14 years ago
app_cdr.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_celgenuserevent.c	Remove unnecessary channel module references.	13 years ago
app_chanisavail.c	app_chanisavail: Fix use of uninitialized variable.	13 years ago
app_channelredirect.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_chanspy.c	Fix Not Unreferencing A Spied Channel	13 years ago
app_confbridge.c	Prevent exhaustion of system resources through exploitation of event cache	12 years ago
app_controlplayback.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_dahdibarge.c	Revert changes to defaultenabled state for modules in Asterisk 1.8	14 years ago
app_dahdiras.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_db.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_dial.c	Fix misuses of timeouts throughout the code.	13 years ago
app_dictate.c	Clean up and ensure proper usage of alloca()	13 years ago
app_directed_pickup.c	Clean up and ensure proper usage of alloca()	13 years ago
app_directory.c	Fix coverity UNUSED_VALUE findings in core support level files	13 years ago
app_disa.c	Coverity Report: Fix issues for error type UNINIT in Core supported modules	13 years ago
app_dumpchan.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_echo.c	Prevent Echo() from relaying control, null, and modem frames	13 years ago
app_exec.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_externalivr.c	Prevent a crash in ExternalIVR when the 'S' command is sent first.	13 years ago
app_fax.c	Load the proper XML documentation when multiple modules document the same application.	14 years ago
app_festival.c	Clean up and ensure proper usage of alloca()	13 years ago
app_flash.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_followme.c	Allow configured numbers for FollowMe to be greater than 90 characters	13 years ago
app_forkcdr.c	Make ForkCDR e option not set end time of the newly forked CDR log	13 years ago
app_getcpeid.c	Clean up and ensure proper usage of alloca()	13 years ago
app_ices.c	Add missing newlines to CLI logging	13 years ago
app_image.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_ivrdemo.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_jack.c	Fix misuses of timeouts throughout the code.	13 years ago
app_macro.c	Clean up and ensure proper usage of alloca()	13 years ago
app_meetme.c	Prevent exhaustion of system resources through exploitation of event cache	12 years ago
app_milliwatt.c	Replace GNU old-style field designator extensions to fix clang warnings	13 years ago
app_minivm.c	Free ast_str objects when temp file fails to be created in MiniVM	13 years ago
app_mixmonitor.c	mixmonitor: Add a test event	13 years ago
app_morsecode.c	Document applications that play audio and do not answer unanswered calls.	14 years ago
app_mp3.c	Document applications that play audio and do not answer unanswered calls.	14 years ago
app_nbscat.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_originate.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_osplookup.c	Clean up and ensure proper usage of alloca()	13 years ago
app_page.c	Fix a variety of memory leaks	13 years ago
app_parkandannounce.c	Fix crash in ParkAndAnnounce.	13 years ago
app_playback.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_playtones.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_privacy.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_queue.c	app_queue: Revert bad ringinuse=no patch.	13 years ago
app_read.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_readexten.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_readfile.c	Revert changes to defaultenabled state for modules in Asterisk 1.8	14 years ago
app_record.c	Fix misuses of timeouts throughout the code.	13 years ago
app_saycounted.c	Document applications that play audio and do not answer unanswered calls.	14 years ago
app_sayunixtime.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_senddtmf.c	Fix SendDTMF crash and channel reference leak using channel name parameter.	13 years ago
app_sendtext.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_setcallerid.c	Revert changes to defaultenabled state for modules in Asterisk 1.8	14 years ago
app_skel.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_sms.c	Clean up and ensure proper usage of alloca()	13 years ago
app_softhangup.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_speech_utils.c	Document Speech* apps hangup on failure and suggest TryExec	13 years ago
app_stack.c	Fix misuses of asprintf throughout the code.	13 years ago
app_system.c	Fixes some support level info so that it can be read by menuselect.	14 years ago
app_talkdetect.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_test.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_transfer.c	Fix the display of documentation for Transfer	13 years ago
app_url.c	Initialize option flags for SendURL application.	14 years ago
app_userevent.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_verbose.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_voicemail.c	Patch to play correct sound file when a voicemail's urgent status is removed	13 years ago
app_voicemail.exports.in	Allow symbol export filtering to work properly on platforms that have symbol prefixes.	15 years ago
app_waitforring.c	Fix misuses of timeouts throughout the code.	13 years ago
app_waitforsilence.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_waituntil.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
app_while.c	Clean up and ensure proper usage of alloca()	13 years ago
app_zapateller.c	Introduce <support_level> tags in MODULEINFO.	14 years ago
enter.h	remove extraneous svn:executable properties	20 years ago
leave.h	remove extraneous svn:executable properties	20 years ago