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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) ........ Merged revisions 378303 from http://svn.asterisk.org/svn/asterisk/branches/1.8 ........ Merged revisions 378320 from http://svn.asterisk.org/svn/asterisk/branches/10 git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@378321 65c4cc65-6c06-0410-ace0-fbb531ad65f3
357 lines
9.9 KiB
C
357 lines
9.9 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2007 - 2008, Digium, Inc.
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*
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* Russell Bryant <russell@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*!
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* \file
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* \author Russell Bryant <russell@digium.com>
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* \brief Generic event system
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*/
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#ifndef AST_EVENT_DEFS_H
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#define AST_EVENT_DEFS_H
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/*! \brief Event types
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* \note These values can *never* change. */
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enum ast_event_type {
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/*! Reserved to provide the ability to subscribe to all events. A specific
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* event should never have a payload of 0. */
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AST_EVENT_ALL = 0x00,
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/*! This event type is reserved for use by third-party modules to create
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* custom events without having to modify this file.
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* \note There are no "custom" IE types, because IEs only have to be
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* unique to the event itself, not necessarily across all events. */
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AST_EVENT_CUSTOM = 0x01,
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/*! Voicemail message waiting indication */
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AST_EVENT_MWI = 0x02,
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/*! Someone has subscribed to events */
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AST_EVENT_SUB = 0x03,
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/*! Someone has unsubscribed from events */
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AST_EVENT_UNSUB = 0x04,
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/*! The aggregate state of a device across all servers configured to be
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* a part of a device state cluster has changed. */
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AST_EVENT_DEVICE_STATE = 0x05,
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/*! The state of a device has changed on _one_ server. This should not be used
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* directly, in general. Use AST_EVENT_DEVICE_STATE instead. */
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AST_EVENT_DEVICE_STATE_CHANGE = 0x06,
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/*! Channel Event Logging events */
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AST_EVENT_CEL = 0x07,
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/*! A report of a security related event (see security_events.h) */
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AST_EVENT_SECURITY = 0x08,
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/*! Used by res_stun_monitor to alert listeners to an exernal network address change. */
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AST_EVENT_NETWORK_CHANGE = 0x09,
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/*! The presence state for a presence provider */
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AST_EVENT_PRESENCE_STATE = 0x0a,
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/*! Used to alert listeners when a named ACL has changed. */
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AST_EVENT_ACL_CHANGE = 0x0b,
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/*! Send out a ping for debugging distributed events */
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AST_EVENT_PING = 0x0c,
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/*! Number of event types. This should be the last event type + 1 */
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AST_EVENT_TOTAL = 0x0d,
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};
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/*! \brief Event Information Element types */
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enum ast_event_ie_type {
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/*! Used to terminate the arguments to event functions */
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AST_EVENT_IE_END = -1,
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/*!
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* \brief Number of new messages
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* Used by: AST_EVENT_MWI
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* Payload type: UINT
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*/
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AST_EVENT_IE_NEWMSGS = 0x0001,
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/*!
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* \brief Number of
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* Used by: AST_EVENT_MWI
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* Payload type: UINT
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*/
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AST_EVENT_IE_OLDMSGS = 0x0002,
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/*!
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* \brief Mailbox name \verbatim (mailbox[@context]) \endverbatim
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* Used by: AST_EVENT_MWI
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* Payload type: STR
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*/
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AST_EVENT_IE_MAILBOX = 0x0003,
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/*!
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* \brief Unique ID
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* Used by: AST_EVENT_SUB, AST_EVENT_UNSUB
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* Payload type: UINT
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*/
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AST_EVENT_IE_UNIQUEID = 0x0004,
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/*!
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* \brief Event type
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* Used by: AST_EVENT_SUB, AST_EVENT_UNSUB
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* Payload type: UINT
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*/
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AST_EVENT_IE_EVENTTYPE = 0x0005,
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/*!
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* \brief Hint that someone cares that an IE exists
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* Used by: AST_EVENT_SUB
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* Payload type: UINT (ast_event_ie_type)
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*/
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AST_EVENT_IE_EXISTS = 0x0006,
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/*!
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* \brief Device Name
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* Used by AST_EVENT_DEVICE_STATE_CHANGE
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* Payload type: STR
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*/
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AST_EVENT_IE_DEVICE = 0x0007,
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/*!
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* \brief Generic State IE
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* Used by AST_EVENT_DEVICE_STATE_CHANGE
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* Payload type: UINT
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* The actual state values depend on the event which
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* this IE is a part of.
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*/
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AST_EVENT_IE_STATE = 0x0008,
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/*!
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* \brief Context IE
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* Used by AST_EVENT_MWI
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* Payload type: str
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*/
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AST_EVENT_IE_CONTEXT = 0x0009,
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/*!
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* \brief Channel Event Type
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* Used by: AST_EVENT_CEL
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* Payload type: UINT
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*/
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AST_EVENT_IE_CEL_EVENT_TYPE = 0x000a,
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/*!
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* \brief Channel Event Time (seconds)
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* Used by: AST_EVENT_CEL
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* Payload type: UINT
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*/
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AST_EVENT_IE_CEL_EVENT_TIME = 0x000b,
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/*!
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* \brief Channel Event Time (micro-seconds)
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* Used by: AST_EVENT_CEL
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* Payload type: UINT
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*/
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AST_EVENT_IE_CEL_EVENT_TIME_USEC = 0x000c,
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/*!
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* \brief Channel Event User Event Name
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_USEREVENT_NAME = 0x000d,
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/*!
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* \brief Channel Event CID name
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_CIDNAME = 0x000e,
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/*!
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* \brief Channel Event CID num
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_CIDNUM = 0x000f,
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/*!
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* \brief Channel Event extension name
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_EXTEN = 0x0010,
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/*!
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* \brief Channel Event context name
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_CONTEXT = 0x0011,
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/*!
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* \brief Channel Event channel name
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_CHANNAME = 0x0012,
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/*!
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* \brief Channel Event app name
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_APPNAME = 0x0013,
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/*!
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* \brief Channel Event app args/data
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_APPDATA = 0x0014,
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/*!
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* \brief Channel Event AMA flags
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* Used by: AST_EVENT_CEL
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* Payload type: UINT
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*/
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AST_EVENT_IE_CEL_AMAFLAGS = 0x0015,
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/*!
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* \brief Channel Event AccountCode
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_ACCTCODE = 0x0016,
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/*!
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* \brief Channel Event UniqueID
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_UNIQUEID = 0x0017,
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/*!
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* \brief Channel Event Userfield
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_USERFIELD = 0x0018,
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/*!
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* \brief Channel Event CID ANI field
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_CIDANI = 0x0019,
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/*!
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* \brief Channel Event CID RDNIS field
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_CIDRDNIS = 0x001a,
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/*!
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* \brief Channel Event CID dnid
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_CIDDNID = 0x001b,
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/*!
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* \brief Channel Event Peer -- for Things involving multiple channels, like BRIDGE
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_PEER = 0x001c,
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/*!
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* \brief Channel Event LinkedID
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_LINKEDID = 0x001d,
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/*!
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* \brief Channel Event peeraccount
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_PEERACCT = 0x001e,
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/*!
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* \brief Channel Event extra data
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* Used by: AST_EVENT_CEL
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* Payload type: STR
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*/
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AST_EVENT_IE_CEL_EXTRA = 0x001f,
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/*!
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* \brief Description
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* Used by: AST_EVENT_SUB, AST_EVENT_UNSUB
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* Payload type: STR
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*/
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AST_EVENT_IE_DESCRIPTION = 0x0020,
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/*!
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* \brief Entity ID
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* Used by All events
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* Payload type: RAW
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* This IE indicates which server the event originated from
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*/
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AST_EVENT_IE_EID = 0x0021,
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AST_EVENT_IE_SECURITY_EVENT = 0x0022,
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AST_EVENT_IE_EVENT_VERSION = 0x0023,
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AST_EVENT_IE_SERVICE = 0x0024,
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AST_EVENT_IE_MODULE = 0x0025,
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AST_EVENT_IE_ACCOUNT_ID = 0x0026,
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AST_EVENT_IE_SESSION_ID = 0x0027,
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AST_EVENT_IE_SESSION_TV = 0x0028,
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AST_EVENT_IE_ACL_NAME = 0x0029,
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AST_EVENT_IE_LOCAL_ADDR = 0x002a,
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AST_EVENT_IE_REMOTE_ADDR = 0x002b,
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AST_EVENT_IE_EVENT_TV = 0x002c,
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AST_EVENT_IE_REQUEST_TYPE = 0x002d,
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AST_EVENT_IE_REQUEST_PARAMS = 0x002e,
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AST_EVENT_IE_AUTH_METHOD = 0x002f,
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AST_EVENT_IE_SEVERITY = 0x0030,
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AST_EVENT_IE_EXPECTED_ADDR = 0x0031,
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AST_EVENT_IE_CHALLENGE = 0x0032,
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AST_EVENT_IE_RESPONSE = 0x0033,
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AST_EVENT_IE_EXPECTED_RESPONSE = 0x0034,
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AST_EVENT_IE_RECEIVED_CHALLENGE = 0x0035,
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AST_EVENT_IE_RECEIVED_HASH = 0x0036,
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AST_EVENT_IE_USING_PASSWORD = 0x0037,
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AST_EVENT_IE_ATTEMPTED_TRANSPORT = 0x0038,
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AST_EVENT_IE_PRESENCE_PROVIDER = 0x0039,
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AST_EVENT_IE_PRESENCE_STATE = 0x003a,
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AST_EVENT_IE_PRESENCE_SUBTYPE = 0x003b,
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AST_EVENT_IE_PRESENCE_MESSAGE = 0x003c,
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/*!
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* \brief Event non-cachability flag
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* Used by: All events
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* Payload type: UINT
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*/
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AST_EVENT_IE_CACHABLE = 0x003d,
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/*! \brief Must be the last IE value +1 */
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AST_EVENT_IE_TOTAL = 0x003e,
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};
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/*!
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* \brief Payload types for event information elements
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*/
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enum ast_event_ie_pltype {
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AST_EVENT_IE_PLTYPE_UNKNOWN = -1,
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/*! Just check if it exists, not the value */
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AST_EVENT_IE_PLTYPE_EXISTS,
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/*! Unsigned Integer (Can be used for signed, too ...) */
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AST_EVENT_IE_PLTYPE_UINT,
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/*! String */
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AST_EVENT_IE_PLTYPE_STR,
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/*! Raw data, compared with memcmp */
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AST_EVENT_IE_PLTYPE_RAW,
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/*! Bit flags (unsigned integer, compared using boolean logic) */
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AST_EVENT_IE_PLTYPE_BITFLAGS,
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};
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/*!
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* \brief Results for checking for subscribers
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*
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* \ref ast_event_check_subscriber()
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*/
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enum ast_event_subscriber_res {
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/*! No subscribers exist */
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AST_EVENT_SUB_NONE,
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/*! At least one subscriber exists */
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AST_EVENT_SUB_EXISTS,
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};
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struct ast_event;
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struct ast_event_ie;
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struct ast_event_sub;
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struct ast_event_iterator;
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/*!
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* \brief supposed to be an opaque type
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*
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* This is only here so that it can be declared on the stack.
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*/
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struct ast_event_iterator {
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uint16_t event_len;
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const struct ast_event *event;
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struct ast_event_ie *ie;
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};
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#endif /* AST_EVENT_DEFS_H */
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