117 lines
3.9 KiB
EmacsLisp
117 lines
3.9 KiB
EmacsLisp
;; jabber-keepalive.el - try to detect lost connection
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;; Copyright (C) 2007 - Detlev Zundel - dzu@gnu.org
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;; Copyright (C) 2004 - Magnus Henoch - mange@freemail.hu
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;; This file is a part of jabber.el.
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program; if not, write to the Free Software
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;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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;;; These keepalive functions send a jabber:iq:time request to the
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;;; server every X minutes, and considers the connection broken if
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;;; they get no answer within Y seconds.
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(defgroup jabber-keepalive nil
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"Keepalive functions try to detect lost connection"
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:group 'jabber)
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(defcustom jabber-keepalive-interval 600
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"Interval in seconds between connection checks."
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:type 'integer
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:group 'jabber-keepalive)
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(defcustom jabber-keepalive-timeout 20
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"Seconds to wait for response from server."
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:type 'integer
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:group 'jabber-keepalive)
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(defvar jabber-keepalive-timer nil
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"Timer object for keepalive function")
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(defvar jabber-keepalive-timeout-timer nil
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"Timer object for keepalive timeout function")
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(defvar jabber-keepalive-pending nil
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"List of outstanding keepalive connections")
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(defvar jabber-keepalive-debug nil
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"Log keepalive traffic when non-nil")
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(defun jabber-keepalive-start (&optional jc)
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"Activate keepalive.
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The JC argument makes it possible to add this function to
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`jabber-post-connect-hooks'; it is ignored. Keepalive is activated
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for all accounts regardless of the argument."
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(interactive)
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(when jabber-keepalive-timer
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(jabber-keepalive-stop))
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(setq jabber-keepalive-timer
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(run-with-timer 5
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jabber-keepalive-interval
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'jabber-keepalive-do))
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(add-hook 'jabber-post-disconnect-hook 'jabber-keepalive-stop))
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(defun jabber-keepalive-stop ()
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"Deactivate keepalive"
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(interactive)
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(when jabber-keepalive-timer
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(jabber-cancel-timer jabber-keepalive-timer)
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(setq jabber-keepalive-timer nil)))
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(defun jabber-keepalive-do ()
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(when jabber-keepalive-debug
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(message "%s: sending keepalive packet(s)" (current-time-string)))
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(setq jabber-keepalive-timeout-timer
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(run-with-timer jabber-keepalive-timeout
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nil
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'jabber-keepalive-timeout))
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(setq jabber-keepalive-pending jabber-connections)
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(dolist (c jabber-connections)
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;; Whether we get an error or not is not interesting.
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;; Getting a response at all is.
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(jabber-send-iq c nil "get"
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'(query ((xmlns . "jabber:iq:time")))
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'jabber-keepalive-got-response nil
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'jabber-keepalive-got-response nil)))
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(defun jabber-keepalive-got-response (jc &rest args)
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(when jabber-keepalive-debug
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(message "%s: got keepalive response from %s"
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(current-time-string)
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(plist-get (fsm-get-state-data jc) :server)))
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(setq jabber-keepalive-pending (remq jc jabber-keepalive-pending))
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(when (null jabber-keepalive-pending)
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(jabber-cancel-timer jabber-keepalive-timeout-timer)
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(setq jabber-keepalive-timeout-timer nil)))
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(defun jabber-keepalive-timeout ()
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(jabber-cancel-timer jabber-keepalive-timer)
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(setq jabber-keepalive-timer nil)
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(dolist (c jabber-keepalive-pending)
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(message "%s: keepalive timeout, connection to %s considered lost"
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(current-time-string)
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(plist-get (fsm-get-state-data c) :server))
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(run-hooks jabber-lost-connection-hook)
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(jabber-disconnect-one c nil)))
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(provide 'jabber-keepalive)
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;;; arch-tag: d19ca743-75a1-475f-9217-83bd18012146
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