93 lines
3.7 KiB
EmacsLisp
93 lines
3.7 KiB
EmacsLisp
;; jabber-si-server.el - handle incoming stream requests, by JEP-0095
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;; Copyright (C) 2002, 2003, 2004 - tom berger - object@intelectronica.net
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;; Copyright (C) 2003, 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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(require 'jabber-iq)
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(require 'jabber-disco)
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(require 'jabber-feature-neg)
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(require 'jabber-si-common)
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(add-to-list 'jabber-advertised-features "http://jabber.org/protocol/si")
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;; Now, stream methods push data to profiles. It could be the other
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;; way around; not sure which is better.
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(defvar jabber-si-profiles nil
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"Supported SI profiles.
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Each entry is a list, containing:
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* The namespace URI of the profile
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* Accept function, taking entire IQ stanza, and signalling a 'forbidden'
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error if request is declined; returning an XML node to return in
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response, or nil of none needed
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* \"Connection established\" function. See `jabber-si-stream-methods'.")
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(add-to-list 'jabber-iq-set-xmlns-alist
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(cons "http://jabber.org/protocol/si" 'jabber-si-process))
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(defun jabber-si-process (jc xml-data)
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(let* ((to (jabber-xml-get-attribute xml-data 'from))
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(id (jabber-xml-get-attribute xml-data 'id))
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(query (jabber-iq-query xml-data))
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(profile (jabber-xml-get-attribute query 'profile))
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(si-id (jabber-xml-get-attribute query 'id))
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(feature (car (jabber-xml-get-children query 'feature))))
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(message "Receiving SI with profile '%s'" profile)
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(let (stream-method
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;; Find profile
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(profile-data (assoc profile jabber-si-profiles)))
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;; Now, feature negotiation for stream type (errors
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;; don't match JEP-0095, so convert)
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(condition-case err
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(setq stream-method (jabber-fn-intersection
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(jabber-fn-parse feature 'request)
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(list (cons "stream-method" (mapcar 'car jabber-si-stream-methods)))))
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(jabber-error
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(jabber-signal-error "cancel" 'bad-request nil
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'((no-valid-streams ((xmlns . "http://jabber.org/protocol/si")))))))
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(unless profile-data
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;; profile not understood
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(jabber-signal-error "cancel" 'bad-request nil
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'((bad-profile ((xmlns . "http://jabber.org/protocol/si"))))))
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(let* ((profile-accept-function (nth 1 profile-data))
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;; accept-function might throw a "forbidden" error
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;; on user cancel
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(profile-response (funcall profile-accept-function jc xml-data))
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(profile-connected-function (nth 2 profile-data))
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(stream-method-id (nth 1 (assoc "stream-method" stream-method)))
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(stream-data (assoc stream-method-id jabber-si-stream-methods))
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(stream-accept-function (nth 2 stream-data)))
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;; prepare stream for the transfer
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(funcall stream-accept-function jc to si-id profile-connected-function)
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;; return result of feature negotiation of stream type
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(jabber-send-iq jc to "result"
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`(si ((xmlns . "http://jabber.org/protocol/si"))
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,@profile-response
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(feature ((xmlns . "http://jabber.org/protocol/feature-neg"))
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,(jabber-fn-encode stream-method 'response)))
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nil nil nil nil
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id)
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))))
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(provide 'jabber-si-server)
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;;; arch-tag: d3c75c66-4052-4cf5-8f04-8765adfc8b96
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