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1 ;;; erc-dcc.el --- CTCP DCC module for ERC
3 ;; Copyright (C) 1993-1995, 1998, 2002-2004, 2006-2015 Free Software
4 ;; Foundation, Inc.
6 ;; Author: Ben A. Mesander <ben@gnu.ai.mit.edu>
7 ;; Noah Friedman <friedman@prep.ai.mit.edu>
8 ;; Per Persson <pp@sno.pp.se>
9 ;; Maintainer: emacs-devel@gnu.org
10 ;; Keywords: comm, processes
11 ;; Created: 1994-01-23
13 ;; This file is part of GNU Emacs.
15 ;; GNU Emacs is free software: you can redistribute it and/or modify
16 ;; it under the terms of the GNU General Public License as published by
17 ;; the Free Software Foundation, either version 3 of the License, or
18 ;; (at your option) any later version.
20 ;; GNU Emacs is distributed in the hope that it will be useful,
21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 ;; GNU General Public License for more details.
25 ;; You should have received a copy of the GNU General Public License
26 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
28 ;;; Commentary:
30 ;; This file provides Direct Client-to-Client support for ERC.
32 ;; The original code was taken from zenirc-dcc.el, heavily mangled and
33 ;; rewritten to support the way how ERC operates. Server socket support
34 ;; was added for DCC CHAT and SEND afterwards. Thanks
35 ;; to the original authors for their work.
37 ;;; Usage:
39 ;; To use this file, put
40 ;; (require 'erc-dcc)
41 ;; in your .emacs.
43 ;; Provided commands
44 ;; /dcc chat nick - Either accept pending chat offer from nick, or offer
45 ;; DCC chat to nick
46 ;; /dcc close type [nick] - Close DCC connection (SEND/GET/CHAT) with nick
47 ;; /dcc get nick [file] - Accept DCC offer from nick
48 ;; /dcc list - List all DCC offers/connections
49 ;; /dcc send nick file - Offer DCC SEND to nick
51 ;; Please note that offering DCC connections (offering chats and sending
52 ;; files) is only supported with Emacs 22.
54 ;;; Code:
56 (require 'erc)
57 (eval-when-compile (require 'pcomplete))
59 ;;;###autoload (autoload 'erc-dcc-mode "erc-dcc")
60 (define-erc-module dcc nil
61 "Provide Direct Client-to-Client support for ERC."
62 ((add-hook 'erc-server-401-functions 'erc-dcc-no-such-nick))
63 ((remove-hook 'erc-server-401-functions 'erc-dcc-no-such-nick)))
65 (defgroup erc-dcc nil
66 "DCC stands for Direct Client Communication, where you and your
67 friend's client programs connect directly to each other,
68 bypassing IRC servers and their occasional \"lag\" or \"split\"
69 problems. Like /MSG, the DCC chat is completely private.
71 Using DCC get and send, you can transfer files directly from and to other
72 IRC users."
73 :group 'erc)
75 (defcustom erc-dcc-verbose nil
76 "If non-nil, be verbose about DCC activity reporting."
77 :group 'erc-dcc
78 :type 'boolean)
80 (defconst erc-dcc-connection-types
81 '("CHAT" "GET" "SEND")
82 "List of valid DCC connection types.
83 All values of the list must be uppercase strings.")
85 (defvar erc-dcc-list nil
86 "List of DCC connections. Looks like:
87 ((:nick \"nick!user@host\" :type GET :peer proc :parent proc :size size :file file)
88 (:nick \"nick!user@host\" :type CHAT :peer proc :parent proc)
89 (:nick \"nick\" :type SEND :peer server-proc :parent parent-proc :file
90 file :sent <marker> :confirmed <marker>))
92 :nick - a user or userhost for the peer. combine with :parent to reach them
94 :type - the type of DCC connection - SEND for outgoing files, GET for
95 incoming, and CHAT for both directions. To tell which end started
96 the DCC chat, look at :peer
98 :peer - the other end of the DCC connection. In the case of outgoing DCCs,
99 this represents a server process until a connection is established
101 :parent - the server process where the dcc connection was established.
102 Note that this can be nil or an invalid process since a DCC
103 connection is in general independent from a particular server
104 connection after it was established.
106 :file - for outgoing sends, the full path to the file. for incoming sends,
107 the suggested filename or vetted filename
109 :size - size of the file, may be nil on incoming DCCs")
111 (defun erc-dcc-list-add (type nick peer parent &rest args)
112 "Add a new entry of type TYPE to `erc-dcc-list' and return it."
113 (car
114 (setq erc-dcc-list
115 (cons
116 (append (list :nick nick :type type :peer peer :parent parent) args)
117 erc-dcc-list))))
119 ;; This function takes all the usual args as open-network-stream, plus one
120 ;; more: the entry data from erc-dcc-list for this particular process.
121 (defvar erc-dcc-connect-function 'erc-dcc-open-network-stream)
123 (defun erc-dcc-open-network-stream (procname buffer addr port entry)
124 (if nil; (fboundp 'open-network-stream-nowait) ;; this currently crashes
125 ;; cvs emacs
126 (open-network-stream-nowait procname buffer addr port)
127 (open-network-stream procname buffer addr port)))
129 (erc-define-catalog
130 'english
131 '((dcc-chat-discarded
132 . "DCC: previous chat request from %n (%u@%h) discarded")
133 (dcc-chat-ended . "DCC: chat with %n ended %t: %e")
134 (dcc-chat-no-request . "DCC: chat request from %n not found")
135 (dcc-chat-offered . "DCC: chat offered by %n (%u@%h:%p)")
136 (dcc-chat-offer . "DCC: offering chat to %n")
137 (dcc-chat-accept . "DCC: accepting chat from %n")
138 (dcc-chat-privmsg . "=%n= %m")
139 (dcc-closed . "DCC: Closed %T from %n")
140 (dcc-command-undefined
141 . "DCC: %c undefined subcommand. GET, CHAT and LIST are defined.")
142 (dcc-ctcp-errmsg . "DCC: `%s' is not a DCC subcommand known to this client")
143 (dcc-ctcp-unknown . "DCC: unknown dcc command `%q' from %n (%u@%h)")
144 (dcc-get-bytes-received . "DCC: %f: %b bytes received")
145 (dcc-get-complete
146 . "DCC: file %f transfer complete (%s bytes in %t seconds)")
147 (dcc-get-cmd-aborted . "DCC: Aborted getting %f from %n")
148 (dcc-get-file-too-long
149 . "DCC: %f: File longer than sender claimed; aborting transfer")
150 (dcc-get-notfound . "DCC: %n hasn't offered %f for DCC transfer")
151 (dcc-list-head . "DCC: From Type Active Size Filename")
152 (dcc-list-line . "DCC: -------- ---- ------ -------------- --------")
153 (dcc-list-item . "DCC: %-8n %-4t %-6a %-14s %f")
154 (dcc-list-end . "DCC: End of list.")
155 (dcc-malformed . "DCC: error: %n (%u@%h) sent malformed request: %q")
156 (dcc-privileged-port
157 . "DCC: possibly bogus request: %p is a privileged port.")
158 (dcc-request-bogus . "DCC: bogus dcc `%r' from %n (%u@%h)")
159 (dcc-send-finished . "DCC: SEND of %f to %n finished (size %s)")
160 (dcc-send-offered . "DCC: file %f offered by %n (%u@%h) (size %s)")
161 (dcc-send-offer . "DCC: offering %f to %n")))
163 ;;; Misc macros and utility functions
165 (defun erc-dcc-member (&rest args)
166 "Return the first matching entry in `erc-dcc-list' which satisfies the
167 constraints given as a plist in ARGS. Returns nil on no match.
169 The property :nick is treated specially, if it contains a '!' character,
170 it is treated as a nick!user@host string, and compared with the :nick property
171 value of the individual elements using string-equal. Otherwise it is
172 compared with `erc-nick-equal-p' which is IRC case-insensitive."
173 (let ((list erc-dcc-list)
174 result test)
175 ;; for each element in erc-dcc-list
176 (while (and list (not result))
177 (let ((elt (car list))
178 (prem args)
179 (cont t))
180 ;; loop through the constraints
181 (while (and prem cont)
182 (let ((prop (car prem))
183 (val (cadr prem)))
184 (setq prem (cddr prem)
185 ;; plist-member is a predicate in xemacs
186 test (and (plist-member elt prop)
187 (plist-get elt prop)))
188 ;; if the property exists and is equal, we continue, else, try the
189 ;; next element of the list
190 (or (and (eq prop :nick) (string-match "!" val)
191 test (string-equal test val))
192 (and (eq prop :nick)
193 test val
194 (erc-nick-equal-p
195 (erc-extract-nick test)
196 (erc-extract-nick val)))
197 ;; not a nick
198 (eq test val)
199 (setq cont nil))))
200 (if cont
201 (setq result elt)
202 (setq list (cdr list)))))
203 result))
205 (defun erc-pack-int (value)
206 "Convert an integer into a packed string in network byte order,
207 which is big-endian."
208 ;; make sure value is not negative
209 (when (< value 0)
210 (error "ERC-DCC (erc-pack-int): packet size is negative"))
211 ;; make sure size is not larger than 4 bytes
212 (let ((len (if (= value 0) 0
213 (ceiling (/ (ceiling (/ (log value) (log 2))) 8.0)))))
214 (when (> len 4)
215 (error "ERC-DCC (erc-pack-int): packet too large")))
216 ;; pack
217 (let ((str (make-string 4 0))
218 (i 3))
219 (while (and (>= i 0) (> value 0))
220 (aset str i (% value 256))
221 (setq value (/ value 256))
222 (setq i (1- i)))
223 str))
225 (defconst erc-most-positive-int-bytes
226 (ceiling (/ (ceiling (/ (log most-positive-fixnum) (log 2))) 8.0))
227 "Maximum number of bytes for a fixnum.")
229 (defconst erc-most-positive-int-msb
230 (lsh most-positive-fixnum (- 0 (* 8 (1- erc-most-positive-int-bytes))))
231 "Content of the most significant byte of most-positive-fixnum.")
233 (defun erc-unpack-int (str)
234 "Unpack a packed string into an integer."
235 (let ((len (length str)))
236 ;; strip leading 0-bytes
237 (let ((start 0))
238 (while (and (> len start) (eq (aref str start) 0))
239 (setq start (1+ start)))
240 (when (> start 0)
241 (setq str (substring str start))
242 (setq len (- len start))))
243 ;; make sure size is not larger than Emacs can handle
244 (when (or (> len (min 4 erc-most-positive-int-bytes))
245 (and (eq len erc-most-positive-int-bytes)
246 (> (aref str 0) erc-most-positive-int-msb)))
247 (error "ERC-DCC (erc-unpack-int): packet to send is too large"))
248 ;; unpack
249 (let ((num 0)
250 (count 0))
251 (while (< count len)
252 (setq num (+ num (lsh (aref str (- len count 1)) (* 8 count))))
253 (setq count (1+ count)))
254 num)))
256 (defconst erc-dcc-ipv4-regexp
257 (concat "^"
258 (mapconcat #'identity (make-list 4 "\\([0-9]\\{1,3\\}\\)") "\\.")
259 "$"))
261 (defun erc-ip-to-decimal (ip)
262 "Convert IP address to its decimal representation.
263 Argument IP is the address as a string. The result is also a string."
264 (interactive "sIP Address: ")
265 (if (not (string-match erc-dcc-ipv4-regexp ip))
266 (error "Not an IP address")
267 (let* ((ips (mapcar
268 (lambda (str)
269 (let ((n (string-to-number str)))
270 (if (and (>= n 0) (< n 256))
272 (error "%d out of range" n))))
273 (split-string ip "\\.")))
274 (res (+ (* (car ips) 16777216.0)
275 (* (nth 1 ips) 65536.0)
276 (* (nth 2 ips) 256.0)
277 (nth 3 ips))))
278 (if (called-interactively-p 'interactive)
279 (message "%s is %.0f" ip res)
280 (format "%.0f" res)))))
282 (defun erc-decimal-to-ip (dec)
283 "Convert a decimal representation DEC to an IP address.
284 The result is also a string."
285 (when (stringp dec)
286 (setq dec (string-to-number (concat dec ".0"))))
287 (let* ((first (floor (/ dec 16777216.0)))
288 (first-rest (- dec (* first 16777216.0)))
289 (second (floor (/ first-rest 65536.0)))
290 (second-rest (- first-rest (* second 65536.0)))
291 (third (floor (/ second-rest 256.0)))
292 (third-rest (- second-rest (* third 256.0)))
293 (fourth (floor third-rest)))
294 (format "%s.%s.%s.%s" first second third fourth)))
296 ;;; Server code
298 (defcustom erc-dcc-listen-host nil
299 "IP address to listen on when offering files.
300 Should be set to a string or nil. If nil, automatic detection of
301 the host interface to use will be attempted."
302 :group 'erc-dcc
303 :type (list 'choice (list 'const :tag "Auto-detect" nil)
304 (list 'string :tag "IP-address"
305 :valid-regexp erc-dcc-ipv4-regexp)))
307 (defcustom erc-dcc-public-host nil
308 "IP address to use for outgoing DCC offers.
309 Should be set to a string or nil. If nil, use the value of
310 `erc-dcc-listen-host'."
311 :group 'erc-dcc
312 :type (list 'choice (list 'const :tag "Same as erc-dcc-listen-host" nil)
313 (list 'string :tag "IP-address"
314 :valid-regexp erc-dcc-ipv4-regexp)))
316 (defcustom erc-dcc-send-request 'ask
317 "How to treat incoming DCC Send requests.
318 'ask - Report the Send request, and wait for the user to manually accept it
319 You might want to set `erc-dcc-auto-masks' for this.
320 'auto - Automatically accept the request and begin downloading the file
321 'ignore - Ignore incoming DCC Send requests completely."
322 :group 'erc-dcc
323 :type '(choice (const ask) (const auto) (const ignore)))
325 (defun erc-dcc-get-host (proc)
326 "Returns the local IP address used for an open PROCess."
327 (format-network-address (process-contact proc :local) t))
329 (defun erc-dcc-host ()
330 "Determine the IP address we are using.
331 If variable `erc-dcc-host' is non-nil, use it. Otherwise call
332 `erc-dcc-get-host' on the erc-server-process."
333 (or erc-dcc-listen-host (erc-dcc-get-host erc-server-process)
334 (error "Unable to determine local address")))
336 (defcustom erc-dcc-port-range nil
337 "If nil, any available user port is used for outgoing DCC connections.
338 If set to a cons, it specifies a range of ports to use in the form (min . max)"
339 :group 'erc-dcc
340 :type '(choice
341 (const :tag "Any port" nil)
342 (cons :tag "Port range"
343 (integer :tag "Lower port")
344 (integer :tag "Upper port"))))
346 (defcustom erc-dcc-auto-masks nil
347 "List of regexps matching user identifiers whose DCC send offers should be
348 accepted automatically. A user identifier has the form \"nick!login@host\".
349 For instance, to accept all incoming DCC send offers automatically, add the
350 string \".*!.*@.*\" to this list."
351 :group 'erc-dcc
352 :type '(repeat regexp))
354 (defun erc-dcc-server (name filter sentinel)
355 "Start listening on a port for an incoming DCC connection. Returns the newly
356 created subprocess, or nil."
357 (let ((port (or (and erc-dcc-port-range (car erc-dcc-port-range)) t))
358 (upper (and erc-dcc-port-range (cdr erc-dcc-port-range)))
359 process)
360 (while (not process)
361 (condition-case err
362 (progn
363 (setq process
364 (make-network-process :name name
365 :buffer nil
366 :host (erc-dcc-host)
367 :service port
368 :nowait t
369 :noquery nil
370 :filter filter
371 :sentinel sentinel
372 :log #'erc-dcc-server-accept
373 :server t))
374 (when (processp process)
375 (when (fboundp 'set-process-coding-system)
376 (set-process-coding-system process 'binary 'binary))
377 (when (fboundp 'set-process-filter-multibyte)
378 (with-no-warnings ; obsolete since 23.1
379 (set-process-filter-multibyte process nil)))))
380 (file-error
381 (unless (and (string= "Cannot bind server socket" (nth 1 err))
382 (string= "address already in use" (downcase (nth 2 err))))
383 (signal (car err) (cdr err)))
384 (setq port (1+ port))
385 (unless (< port upper)
386 (error "No available ports in erc-dcc-port-range")))))
387 process))
389 (defun erc-dcc-server-accept (server client message)
390 "Log an accepted DCC offer, then terminate the listening process and set up
391 the accepted connection."
392 (erc-log (format "(erc-dcc-server-accept): server %s client %s message %s"
393 server client message))
394 (when (and (string-match "^accept from " message)
395 (processp server) (processp client))
396 (let ((elt (erc-dcc-member :peer server)))
397 ;; change the entry in erc-dcc-list from the listening process to the
398 ;; accepted process
399 (setq elt (plist-put elt :peer client))
400 ;; delete the listening process, as we've accepted the connection
401 (delete-process server))))
403 ;;; Interactive command handling
405 (defcustom erc-dcc-get-default-directory nil
406 "Default directory for incoming DCC file transfers.
407 If this is nil, then the current value of `default-directory' is used."
408 :group 'erc-dcc
409 :type '(choice (const nil :tag "Default directory") directory))
411 ;;;###autoload
412 (defun erc-cmd-DCC (cmd &rest args)
413 "Parser for /dcc command.
414 This figures out the dcc subcommand and calls the appropriate routine to
415 handle it. The function dispatched should be named \"erc-dcc-do-FOO-command\",
416 where FOO is one of CLOSE, GET, SEND, LIST, CHAT, etc."
417 (when cmd
418 (let ((fn (intern-soft (concat "erc-dcc-do-" (upcase cmd) "-command"))))
419 (if fn
420 (apply fn erc-server-process args)
421 (erc-display-message
422 nil 'notice 'active
423 'dcc-command-undefined ?c cmd)
424 (apropos "erc-dcc-do-.*-command")
425 t))))
427 (autoload 'pcomplete-erc-all-nicks "erc-pcomplete")
429 ;;;###autoload
430 (defun pcomplete/erc-mode/DCC ()
431 "Provides completion for the /DCC command."
432 (pcomplete-here (append '("chat" "close" "get" "list")
433 (when (fboundp 'make-network-process) '("send"))))
434 (pcomplete-here
435 (pcase (intern (downcase (pcomplete-arg 1)))
436 (`chat (mapcar (lambda (elt) (plist-get elt :nick))
437 (erc-remove-if-not
438 #'(lambda (elt)
439 (eq (plist-get elt :type) 'CHAT))
440 erc-dcc-list)))
441 (`close (erc-delete-dups
442 (mapcar (lambda (elt) (symbol-name (plist-get elt :type)))
443 erc-dcc-list)))
444 (`get (mapcar #'erc-dcc-nick
445 (erc-remove-if-not
446 #'(lambda (elt)
447 (eq (plist-get elt :type) 'GET))
448 erc-dcc-list)))
449 (`send (pcomplete-erc-all-nicks))))
450 (pcomplete-here
451 (pcase (intern (downcase (pcomplete-arg 2)))
452 (`get (mapcar (lambda (elt) (plist-get elt :file))
453 (erc-remove-if-not
454 #'(lambda (elt)
455 (and (eq (plist-get elt :type) 'GET)
456 (erc-nick-equal-p (erc-extract-nick
457 (plist-get elt :nick))
458 (pcomplete-arg 1))))
459 erc-dcc-list)))
460 (`close (mapcar #'erc-dcc-nick
461 (erc-remove-if-not
462 #'(lambda (elt)
463 (eq (plist-get elt :type)
464 (intern (upcase (pcomplete-arg 1)))))
465 erc-dcc-list)))
466 (`send (pcomplete-entries)))))
468 (defun erc-dcc-do-CHAT-command (proc &optional nick)
469 (when nick
470 (let ((elt (erc-dcc-member :nick nick :type 'CHAT :parent proc)))
471 (if (and elt (not (processp (plist-get elt :peer))))
472 ;; accept an existing chat offer
473 ;; FIXME: perhaps /dcc accept like other clients?
474 (progn (erc-dcc-chat-accept elt erc-server-process)
475 (erc-display-message
476 nil 'notice 'active
477 'dcc-chat-accept ?n nick)
479 (erc-dcc-chat nick erc-server-process)
480 (erc-display-message
481 nil 'notice 'active
482 'dcc-chat-offer ?n nick)
483 t))))
485 (defun erc-dcc-do-CLOSE-command (proc &optional type nick)
486 "Close a connection. Usage: /dcc close type nick.
487 At least one of TYPE and NICK must be provided."
488 ;; disambiguate type and nick if only one is provided
489 (when (and type (null nick)
490 (not (member (upcase type) erc-dcc-connection-types)))
491 (setq nick type)
492 (setq type nil))
493 ;; validate nick argument
494 (unless (and nick (string-match (concat "\\`" erc-valid-nick-regexp "\\'")
495 nick))
496 (setq nick nil))
497 ;; validate type argument
498 (if (and type (member (upcase type) erc-dcc-connection-types))
499 (setq type (intern (upcase type)))
500 (setq type nil))
501 (when (or nick type)
502 (let ((ret t))
503 (while ret
504 (cond ((and nick type)
505 (setq ret (erc-dcc-member :type type :nick nick)))
506 (nick
507 (setq ret (erc-dcc-member :nick nick)))
508 (type
509 (setq ret (erc-dcc-member :type type)))
511 (setq ret nil)))
512 (when ret
513 ;; found a match - delete process if it exists.
514 (and (processp (plist-get ret :peer))
515 (delete-process (plist-get ret :peer)))
516 (setq erc-dcc-list (delq ret erc-dcc-list))
517 (erc-display-message
518 nil 'notice 'active
519 'dcc-closed
520 ?T (plist-get ret :type)
521 ?n (erc-extract-nick (plist-get ret :nick))))))
524 (defun erc-dcc-do-GET-command (proc nick &rest file)
525 "Do a DCC GET command. NICK is the person who is sending the file.
526 FILE is the filename. If FILE is split into multiple arguments,
527 re-join the arguments, separated by a space.
528 PROC is the server process."
529 (setq file (and file (mapconcat #'identity file " ")))
530 (let* ((elt (erc-dcc-member :nick nick :type 'GET))
531 (filename (or file (plist-get elt :file) "unknown")))
532 (if elt
533 (let* ((file (read-file-name
534 (format "Local filename (default %s): "
535 (file-name-nondirectory filename))
536 (or erc-dcc-get-default-directory
537 default-directory)
538 (expand-file-name (file-name-nondirectory filename)
539 (or erc-dcc-get-default-directory
540 default-directory)))))
541 (cond ((file-exists-p file)
542 (if (yes-or-no-p (format "File %s exists. Overwrite? "
543 file))
544 (erc-dcc-get-file elt file proc)
545 (erc-display-message
546 nil '(notice error) proc
547 'dcc-get-cmd-aborted
548 ?n nick ?f filename)))
550 (erc-dcc-get-file elt file proc))))
551 (erc-display-message
552 nil '(notice error) 'active
553 'dcc-get-notfound ?n nick ?f filename))))
555 (defvar erc-dcc-byte-count nil)
556 (make-variable-buffer-local 'erc-dcc-byte-count)
558 (defun erc-dcc-do-LIST-command (proc)
559 "This is the handler for the /dcc list command.
560 It lists the current state of `erc-dcc-list' in an easy to read manner."
561 (let ((alist erc-dcc-list)
562 size elt)
563 (erc-display-message
564 nil 'notice 'active
565 'dcc-list-head)
566 (erc-display-message
567 nil 'notice 'active
568 'dcc-list-line)
569 (while alist
570 (setq elt (car alist)
571 alist (cdr alist))
573 (setq size (or (and (plist-member elt :size)
574 (plist-get elt :size))
575 ""))
576 (setq size
577 (cond ((null size) "")
578 ((numberp size) (number-to-string size))
579 ((string= size "") "unknown")))
580 (erc-display-message
581 nil 'notice 'active
582 'dcc-list-item
583 ?n (erc-dcc-nick elt)
584 ?t (plist-get elt :type)
585 ?a (if (processp (plist-get elt :peer))
586 (process-status (plist-get elt :peer))
587 "no")
588 ?s (concat size
589 (if (and (eq 'GET (plist-get elt :type))
590 (plist-member elt :file)
591 (buffer-live-p (get-buffer (plist-get elt :file)))
592 (plist-member elt :size))
593 (let ((byte-count (with-current-buffer
594 (get-buffer (plist-get elt :file))
595 (+ (buffer-size) 0.0
596 erc-dcc-byte-count))))
597 (concat " ("
598 (if (= byte-count 0)
600 (number-to-string
601 (truncate
602 (* 100
603 (/ byte-count (plist-get elt :size))))))
604 "%)"))))
605 ?f (or (and (plist-member elt :file) (plist-get elt :file)) "")))
606 (erc-display-message
607 nil 'notice 'active
608 'dcc-list-end)
611 (defun erc-dcc-do-SEND-command (proc nick &rest file)
612 "Offer FILE to NICK by sending a ctcp dcc send message.
613 If FILE is split into multiple arguments, re-join the arguments,
614 separated by a space."
615 (setq file (and file (mapconcat #'identity file " ")))
616 (if (file-exists-p file)
617 (progn
618 (erc-display-message
619 nil 'notice 'active
620 'dcc-send-offer ?n nick ?f file)
621 (erc-dcc-send-file nick file) t)
622 (erc-display-message nil '(notice error) proc "File not found") t))
624 ;;; Server message handling (i.e. messages from remote users)
626 ;;;###autoload
627 (defvar erc-ctcp-query-DCC-hook '(erc-ctcp-query-DCC)
628 "Hook variable for CTCP DCC queries.")
630 (defvar erc-dcc-query-handler-alist
631 '(("SEND" . erc-dcc-handle-ctcp-send)
632 ("CHAT" . erc-dcc-handle-ctcp-chat)))
634 ;;;###autoload
635 (defun erc-ctcp-query-DCC (proc nick login host to query)
636 "The function called when a CTCP DCC request is detected by the client.
637 It examines the DCC subcommand, and calls the appropriate routine for
638 that subcommand."
639 (let* ((cmd (cadr (split-string query " ")))
640 (handler (cdr (assoc cmd erc-dcc-query-handler-alist))))
641 (if handler
642 (funcall handler proc query nick login host to)
643 ;; FIXME: Send a ctcp error notice to the remote end?
644 (erc-display-message
645 nil '(notice error) proc
646 'dcc-ctcp-unknown
647 ?q query ?n nick ?u login ?h host))))
649 (defconst erc-dcc-ctcp-query-send-regexp
650 (concat "^DCC SEND \\("
651 ;; Following part matches either filename without spaces
652 ;; or filename enclosed in double quotes with any number
653 ;; of escaped double quotes inside.
654 "\"\\(\\(.*?\\(\\\\\"\\)?\\)+?\\)\"\\|\\([^ ]+\\)"
655 "\\) \\([0-9]+\\) \\([0-9]+\\) *\\([0-9]*\\)"))
657 (defsubst erc-dcc-unquote-filename (filename)
658 (erc-replace-regexp-in-string "\\\\\\\\" "\\"
659 (erc-replace-regexp-in-string "\\\\\"" "\"" filename t t) t t))
661 (defun erc-dcc-handle-ctcp-send (proc query nick login host to)
662 "This is called if a CTCP DCC SEND subcommand is sent to the client.
663 It extracts the information about the dcc request and adds it to
664 `erc-dcc-list'."
665 (unless (eq erc-dcc-send-request 'ignore)
666 (cond
667 ((not (erc-current-nick-p to))
668 ;; DCC SEND requests must be sent to you, and you alone.
669 (erc-display-message
670 nil 'notice proc
671 'dcc-request-bogus
672 ?r "SEND" ?n nick ?u login ?h host))
673 ((string-match erc-dcc-ctcp-query-send-regexp query)
674 (let ((filename
675 (or (match-string 5 query)
676 (erc-dcc-unquote-filename (match-string 2 query))))
677 (ip (erc-decimal-to-ip (match-string 6 query)))
678 (port (match-string 7 query))
679 (size (match-string 8 query)))
680 ;; FIXME: a warning really should also be sent
681 ;; if the ip address != the host the dcc sender is on.
682 (erc-display-message
683 nil 'notice proc
684 'dcc-send-offered
685 ?f filename ?n nick ?u login ?h host
686 ?s (if (string= size "") "unknown" size))
687 (and (< (string-to-number port) 1025)
688 (erc-display-message
689 nil 'notice proc
690 'dcc-privileged-port
691 ?p port))
692 (erc-dcc-list-add
693 'GET (format "%s!%s@%s" nick login host)
694 nil proc
695 :ip ip :port port :file filename
696 :size (string-to-number size))
697 (if (and (eq erc-dcc-send-request 'auto)
698 (erc-dcc-auto-mask-p (format "\"%s!%s@%s\"" nick login host)))
699 (erc-dcc-get-file (car erc-dcc-list) filename proc))))
701 (erc-display-message
702 nil 'notice proc
703 'dcc-malformed
704 ?n nick ?u login ?h host ?q query)))))
706 (defun erc-dcc-auto-mask-p (spec)
707 "Takes a full SPEC of a user in the form \"nick!login@host\" and
708 matches against all the regexp's in `erc-dcc-auto-masks'. If any
709 match, returns that regexp and nil otherwise."
710 (let ((lst erc-dcc-auto-masks))
711 (while (and lst
712 (not (string-match (car lst) spec)))
713 (setq lst (cdr lst)))
714 (and lst (car lst))))
716 (defconst erc-dcc-ctcp-query-chat-regexp
717 "^DCC CHAT +chat +\\([0-9]+\\) +\\([0-9]+\\)")
719 (defcustom erc-dcc-chat-request 'ask
720 "How to treat incoming DCC Chat requests.
721 'ask - Report the Chat request, and wait for the user to manually accept it
722 'auto - Automatically accept the request and open a new chat window
723 'ignore - Ignore incoming DCC chat requests completely."
724 :group 'erc-dcc
725 :type '(choice (const ask) (const auto) (const ignore)))
727 (defun erc-dcc-handle-ctcp-chat (proc query nick login host to)
728 (unless (eq erc-dcc-chat-request 'ignore)
729 (cond
730 (;; DCC CHAT requests must be sent to you, and you alone.
731 (not (erc-current-nick-p to))
732 (erc-display-message
733 nil '(notice error) proc
734 'dcc-request-bogus ?r "CHAT" ?n nick ?u login ?h host))
735 ((string-match erc-dcc-ctcp-query-chat-regexp query)
736 ;; We need to use let* here, since erc-dcc-member might clutter
737 ;; the match value.
738 (let* ((ip (erc-decimal-to-ip (match-string 1 query)))
739 (port (match-string 2 query))
740 (elt (erc-dcc-member :nick nick :type 'CHAT)))
741 ;; FIXME: A warning really should also be sent if the ip
742 ;; address != the host the dcc sender is on.
743 (erc-display-message
744 nil 'notice proc
745 'dcc-chat-offered
746 ?n nick ?u login ?h host ?p port)
747 (and (< (string-to-number port) 1025)
748 (erc-display-message
749 nil 'notice proc
750 'dcc-privileged-port ?p port))
751 (cond (elt
752 ;; XXX: why are we updating ip/port on the existing connection?
753 (setq elt (plist-put (plist-put elt :port port) :ip ip))
754 (erc-display-message
755 nil 'notice proc
756 'dcc-chat-discarded ?n nick ?u login ?h host))
758 (erc-dcc-list-add
759 'CHAT (format "%s!%s@%s" nick login host)
760 nil proc
761 :ip ip :port port)))
762 (if (eq erc-dcc-chat-request 'auto)
763 (erc-dcc-chat-accept (erc-dcc-member :nick nick :type 'CHAT)
764 proc))))
766 (erc-display-message
767 nil '(notice error) proc
768 'dcc-malformed ?n nick ?u login ?h host ?q query)))))
771 (defvar erc-dcc-entry-data nil
772 "Holds the `erc-dcc-list' entry for this DCC connection.")
773 (make-variable-buffer-local 'erc-dcc-entry-data)
775 ;;; SEND handling
777 (defcustom erc-dcc-block-size 1024
778 "Block size to use for DCC SEND sessions."
779 :group 'erc-dcc
780 :type 'integer)
782 (defcustom erc-dcc-pump-bytes nil
783 "If set to an integer, keep sending until that number of bytes are
784 unconfirmed."
785 :group 'erc-dcc
786 :type '(choice (const nil) integer))
788 (defsubst erc-dcc-get-parent (proc)
789 (plist-get (erc-dcc-member :peer proc) :parent))
791 (defun erc-dcc-send-block (proc)
792 "Send one block of data.
793 PROC is the process-object of the DCC connection. Returns the number of
794 bytes sent."
795 (let* ((elt (erc-dcc-member :peer proc))
796 (confirmed-marker (plist-get elt :sent))
797 (sent-marker (plist-get elt :sent)))
798 (with-current-buffer (process-buffer proc)
799 (when erc-dcc-verbose
800 (erc-display-message
801 nil 'notice (erc-dcc-get-parent proc)
802 (format "DCC: Confirmed %d, sent %d, sending block now"
803 (- confirmed-marker (point-min))
804 (- sent-marker (point-min)))))
805 (let* ((end (min (+ sent-marker erc-dcc-block-size)
806 (point-max)))
807 (string (buffer-substring-no-properties sent-marker end)))
808 (when (< sent-marker end)
809 (set-marker sent-marker end)
810 (process-send-string proc string))
811 (length string)))))
813 (defun erc-dcc-send-filter (proc string)
814 (let* ((size (erc-unpack-int string))
815 (elt (erc-dcc-member :peer proc))
816 (parent (plist-get elt :parent))
817 (sent-marker (plist-get elt :sent))
818 (confirmed-marker (plist-get elt :confirmed)))
819 (with-current-buffer (process-buffer proc)
820 (set-marker confirmed-marker (+ (point-min) size))
821 (cond
822 ((and (= confirmed-marker sent-marker)
823 (= confirmed-marker (point-max)))
824 (erc-display-message
825 nil 'notice parent
826 'dcc-send-finished
827 ?n (plist-get elt :nick)
828 ?f buffer-file-name
829 ?s (number-to-string (- sent-marker (point-min))))
830 (setq erc-dcc-list (delete elt erc-dcc-list))
831 (set-buffer-modified-p nil)
832 (kill-buffer (current-buffer))
833 (delete-process proc))
834 ((<= confirmed-marker sent-marker)
835 (while (and (< (- sent-marker confirmed-marker)
836 (or erc-dcc-pump-bytes
837 erc-dcc-block-size))
838 (> (erc-dcc-send-block proc) 0))))
839 ((> confirmed-marker sent-marker)
840 (erc-display-message
841 nil 'notice parent
842 (format "DCC: Client confirmed too much (%s vs %s)!"
843 (marker-position confirmed-marker)
844 (marker-position sent-marker)))
845 (set-buffer-modified-p nil)
846 (kill-buffer (current-buffer))
847 (delete-process proc))))))
849 (defun erc-dcc-display-send (proc)
850 (erc-display-message
851 nil 'notice (erc-dcc-get-parent proc)
852 (format "DCC: SEND connect from %s"
853 (format-network-address (process-contact proc :remote)))))
855 (defcustom erc-dcc-send-connect-hook
856 '(erc-dcc-display-send erc-dcc-send-block)
857 "Hook run whenever the remote end of a DCC SEND offer connected to your
858 listening port."
859 :group 'erc-dcc
860 :type 'hook)
862 (defun erc-dcc-nick (plist)
863 "Extract the nickname portion of the :nick property value in PLIST."
864 (erc-extract-nick (plist-get plist :nick)))
866 (defun erc-dcc-send-sentinel (proc event)
867 (let* ((elt (erc-dcc-member :peer proc)))
868 (cond
869 ((string-match "^open from " event)
870 (when elt
871 (let ((buf (marker-buffer (plist-get elt :sent))))
872 (with-current-buffer buf
873 (set-process-buffer proc buf)
874 (setq erc-dcc-entry-data elt)))
875 (run-hook-with-args 'erc-dcc-send-connect-hook proc))))))
877 (defun erc-dcc-find-file (file)
878 (with-current-buffer (generate-new-buffer (file-name-nondirectory file))
879 (insert-file-contents-literally file)
880 (setq buffer-file-name file)
881 (current-buffer)))
883 (defun erc-dcc-file-to-name (file)
884 (with-temp-buffer
885 (insert (file-name-nondirectory file))
886 (subst-char-in-region (point-min) (point-max) ? ?_ t)
887 (buffer-string)))
889 (defun erc-dcc-send-file (nick file &optional pproc)
890 "Open a socket for incoming connections, and send a CTCP send request to the
891 other client."
892 (interactive "sNick: \nfFile: ")
893 (when (null pproc) (if (processp erc-server-process)
894 (setq pproc erc-server-process)
895 (error "Can not find parent process")))
896 (if (featurep 'make-network-process)
897 (let* ((buffer (erc-dcc-find-file file))
898 (size (buffer-size buffer))
899 (start (with-current-buffer buffer
900 (point-min-marker)))
901 (sproc (erc-dcc-server "dcc-send"
902 'erc-dcc-send-filter
903 'erc-dcc-send-sentinel))
904 (contact (process-contact sproc)))
905 (erc-dcc-list-add
906 'SEND nick sproc pproc
907 :file file :size size
908 :sent start :confirmed (copy-marker start))
909 (process-send-string
910 pproc (format "PRIVMSG %s :\C-aDCC SEND %s %s %d %d\C-a\n"
911 nick (erc-dcc-file-to-name file)
912 (erc-ip-to-decimal (or erc-dcc-public-host
913 (nth 0 contact)))
914 (nth 1 contact)
915 size)))
916 (error "`make-network-process' not supported by your Emacs")))
918 ;;; GET handling
920 (defcustom erc-dcc-receive-cache (* 1024 512)
921 "Number of bytes to let the receive buffer grow before flushing it."
922 :group 'erc-dcc
923 :type 'integer)
925 (defvar erc-dcc-file-name nil)
926 (make-variable-buffer-local 'erc-dcc-file-name)
928 (defun erc-dcc-get-file (entry file parent-proc)
929 "This function does the work of setting up a transfer from the remote client
930 to the local one over a tcp connection. This involves setting up a process
931 filter and a process sentinel, and making the connection."
932 (let* ((buffer (generate-new-buffer (file-name-nondirectory file)))
933 proc)
934 (with-current-buffer buffer
935 (fundamental-mode)
936 (buffer-disable-undo (current-buffer))
937 ;; This is necessary to have the buffer saved as-is in GNU
938 ;; Emacs.
939 ;; XEmacs change: We don't have `set-buffer-multibyte', setting
940 ;; coding system to 'binary below takes care of us.
941 (when (fboundp 'set-buffer-multibyte)
942 (set-buffer-multibyte nil))
944 (setq mode-line-process '(":%s")
945 buffer-read-only t)
946 (setq erc-dcc-file-name file)
948 ;; Truncate the given file to size 0 before appending to it.
949 (let ((inhibit-file-name-handlers
950 (append '(jka-compr-handler image-file-handler)
951 inhibit-file-name-handlers))
952 (inhibit-file-name-operation 'write-region))
953 (write-region (point) (point) erc-dcc-file-name nil 'nomessage))
955 (setq erc-server-process parent-proc
956 erc-dcc-entry-data entry)
957 (setq erc-dcc-byte-count 0)
958 (setq proc
959 (funcall erc-dcc-connect-function
960 "dcc-get" buffer
961 (plist-get entry :ip)
962 (string-to-number (plist-get entry :port))
963 entry))
964 (set-process-buffer proc buffer)
965 (set-process-coding-system proc 'binary 'binary)
966 (set-buffer-file-coding-system 'binary t)
968 (set-process-filter proc 'erc-dcc-get-filter)
969 (set-process-sentinel proc 'erc-dcc-get-sentinel)
970 (setq entry (plist-put entry :start-time (erc-current-time)))
971 (setq entry (plist-put entry :peer proc)))))
973 (defun erc-dcc-append-contents (buffer file)
974 "Append the contents of BUFFER to FILE.
975 The contents of the BUFFER will then be erased."
976 (with-current-buffer buffer
977 (let ((coding-system-for-write 'binary)
978 (inhibit-read-only t)
979 (inhibit-file-name-handlers
980 (append '(jka-compr-handler image-file-handler)
981 inhibit-file-name-handlers))
982 (inhibit-file-name-operation 'write-region))
983 (write-region (point-min) (point-max) erc-dcc-file-name t 'nomessage)
984 (setq erc-dcc-byte-count (+ (buffer-size) erc-dcc-byte-count))
985 (erase-buffer))))
987 (defun erc-dcc-get-filter (proc str)
988 "This is the process filter for transfers from other clients to this one.
989 It reads incoming bytes from the network and stores them in the DCC
990 buffer, and sends back the replies after each block of data per the DCC
991 protocol spec. Well not really. We write back a reply after each read,
992 rather than every 1024 byte block, but nobody seems to care."
993 (with-current-buffer (process-buffer proc)
994 (let ((inhibit-read-only t)
995 received-bytes)
996 (goto-char (point-max))
997 (insert (string-make-unibyte str))
999 (when (> (point-max) erc-dcc-receive-cache)
1000 (erc-dcc-append-contents (current-buffer) erc-dcc-file-name))
1001 (setq received-bytes (+ (buffer-size) erc-dcc-byte-count))
1003 (and erc-dcc-verbose
1004 (erc-display-message
1005 nil 'notice erc-server-process
1006 'dcc-get-bytes-received
1007 ?f (file-name-nondirectory buffer-file-name)
1008 ?b (number-to-string received-bytes)))
1009 (cond
1010 ((and (> (plist-get erc-dcc-entry-data :size) 0)
1011 (> received-bytes (plist-get erc-dcc-entry-data :size)))
1012 (erc-display-message
1013 nil '(error notice) 'active
1014 'dcc-get-file-too-long
1015 ?f (file-name-nondirectory buffer-file-name))
1016 (delete-process proc))
1018 (process-send-string
1019 proc (erc-pack-int received-bytes)))))))
1022 (defun erc-dcc-get-sentinel (proc event)
1023 "This is the process sentinel for CTCP DCC SEND connections.
1024 It shuts down the connection and notifies the user that the
1025 transfer is complete."
1026 ;; FIXME, we should look at EVENT, and also check size.
1027 (with-current-buffer (process-buffer proc)
1028 (delete-process proc)
1029 (setq erc-dcc-list (delete erc-dcc-entry-data erc-dcc-list))
1030 (unless (= (point-min) (point-max))
1031 (erc-dcc-append-contents (current-buffer) erc-dcc-file-name))
1032 (erc-display-message
1033 nil 'notice erc-server-process
1034 'dcc-get-complete
1035 ?f erc-dcc-file-name
1036 ?s (number-to-string erc-dcc-byte-count)
1037 ?t (format "%.0f"
1038 (erc-time-diff (plist-get erc-dcc-entry-data :start-time)
1039 (erc-current-time)))))
1040 (kill-buffer (process-buffer proc))
1041 (delete-process proc))
1043 ;;; CHAT handling
1045 (defcustom erc-dcc-chat-buffer-name-format "DCC-CHAT-%s"
1046 "Format to use for DCC Chat buffer names."
1047 :group 'erc-dcc
1048 :type 'string)
1050 (defcustom erc-dcc-chat-mode-hook nil
1051 "Hook calls when `erc-dcc-chat-mode' finished setting up the buffer."
1052 :group 'erc-dcc
1053 :type 'hook)
1055 (defcustom erc-dcc-chat-connect-hook nil
1057 :group 'erc-dcc
1058 :type 'hook)
1060 (defcustom erc-dcc-chat-exit-hook nil
1062 :group 'erc-dcc
1063 :type 'hook)
1065 (defun erc-cmd-CREQ (line &optional force)
1066 "Set or get the DCC chat request flag.
1067 Possible values are: ask, auto, ignore."
1068 (when (string-match "^\\s-*\\(auto\\|ask\\|ignore\\)?$" line)
1069 (let ((cmd (match-string 1 line)))
1070 (if (stringp cmd)
1071 (erc-display-message
1072 nil 'notice 'active
1073 (format "Set DCC Chat requests to %S"
1074 (setq erc-dcc-chat-request (intern cmd))))
1075 (erc-display-message nil 'notice 'active
1076 (format "DCC Chat requests are set to %S"
1077 erc-dcc-chat-request)))
1078 t)))
1080 (defun erc-cmd-SREQ (line &optional force)
1081 "Set or get the DCC send request flag.
1082 Possible values are: ask, auto, ignore."
1083 (when (string-match "^\\s-*\\(auto\\|ask\\|ignore\\)?$" line)
1084 (let ((cmd (match-string 1 line)))
1085 (if (stringp cmd)
1086 (erc-display-message
1087 nil 'notice 'active
1088 (format "Set DCC Send requests to %S"
1089 (setq erc-dcc-send-request (intern cmd))))
1090 (erc-display-message nil 'notice 'active
1091 (format "DCC Send requests are set to %S"
1092 erc-dcc-send-request)))
1093 t)))
1095 (defun pcomplete/erc-mode/CREQ ()
1096 (pcomplete-here '("auto" "ask" "ignore")))
1097 (defalias 'pcomplete/erc-mode/SREQ 'pcomplete/erc-mode/CREQ)
1099 (defvar erc-dcc-chat-filter-functions '(erc-dcc-chat-parse-output)
1100 "Abnormal hook run after parsing (and maybe inserting) a DCC message.
1101 Each function is called with two arguments: the ERC process and
1102 the unprocessed output.")
1104 (define-obsolete-variable-alias 'erc-dcc-chat-filter-hook
1105 'erc-dcc-chat-filter-functions "24.3")
1107 (defvar erc-dcc-chat-mode-map
1108 (let ((map (make-sparse-keymap)))
1109 (define-key map (kbd "RET") 'erc-send-current-line)
1110 (define-key map "\t" 'completion-at-point)
1111 map)
1112 "Keymap for `erc-dcc-mode'.")
1114 (define-derived-mode erc-dcc-chat-mode fundamental-mode "DCC-Chat"
1115 "Major mode for wasting time via DCC chat."
1116 (setq mode-line-process '(":%s")
1117 erc-send-input-line-function 'erc-dcc-chat-send-input-line
1118 erc-default-recipients '(dcc))
1119 (add-hook 'completion-at-point-functions 'erc-complete-word-at-point nil t))
1121 (defun erc-dcc-chat-send-input-line (recipient line &optional force)
1122 "Send LINE to the remote end.
1123 Argument RECIPIENT should always be the symbol dcc, and force
1124 is ignored."
1125 ;; FIXME: We need to get rid of all force arguments one day!
1126 (if (eq recipient 'dcc)
1127 (process-send-string
1128 (get-buffer-process (current-buffer)) line)
1129 (error "erc-dcc-chat-send-input-line in %s" (current-buffer))))
1131 (defun erc-dcc-chat (nick &optional pproc)
1132 "Open a socket for incoming connections, and send a chat request to the
1133 other client."
1134 (interactive "sNick: ")
1135 (when (null pproc) (if (processp erc-server-process)
1136 (setq pproc erc-server-process)
1137 (error "Can not find parent process")))
1138 (let* ((sproc (erc-dcc-server "dcc-chat-out"
1139 'erc-dcc-chat-filter
1140 'erc-dcc-chat-sentinel))
1141 (contact (process-contact sproc)))
1142 (erc-dcc-list-add 'OCHAT nick sproc pproc)
1143 (process-send-string pproc
1144 (format "PRIVMSG %s :\C-aDCC CHAT chat %s %d\C-a\n"
1145 nick
1146 (erc-ip-to-decimal (nth 0 contact)) (nth 1 contact)))))
1148 (defvar erc-dcc-from)
1149 (make-variable-buffer-local 'erc-dcc-from)
1151 (defvar erc-dcc-unprocessed-output)
1152 (make-variable-buffer-local 'erc-dcc-unprocessed-output)
1154 (defun erc-dcc-chat-setup (entry)
1155 "Setup a DCC chat buffer, returning the buffer."
1156 (let* ((nick (erc-extract-nick (plist-get entry :nick)))
1157 (buffer (generate-new-buffer
1158 (format erc-dcc-chat-buffer-name-format nick)))
1159 (proc (plist-get entry :peer))
1160 (parent-proc (plist-get entry :parent)))
1161 (erc-setup-buffer buffer)
1162 ;; buffer is now the current buffer.
1163 (erc-dcc-chat-mode)
1164 (setq erc-server-process parent-proc)
1165 (setq erc-dcc-from nick)
1166 (setq erc-dcc-entry-data entry)
1167 (setq erc-dcc-unprocessed-output "")
1168 (setq erc-insert-marker (point-max-marker))
1169 (setq erc-input-marker (make-marker))
1170 (erc-display-prompt buffer (point-max))
1171 (set-process-buffer proc buffer)
1172 (add-hook 'kill-buffer-hook 'erc-dcc-chat-buffer-killed nil t)
1173 (run-hook-with-args 'erc-dcc-chat-connect-hook proc)
1174 buffer))
1176 (defun erc-dcc-chat-accept (entry parent-proc)
1177 "Accept an incoming DCC connection and open a DCC window"
1178 (let* ((nick (erc-extract-nick (plist-get entry :nick)))
1179 buffer proc)
1180 (setq proc
1181 (funcall erc-dcc-connect-function
1182 "dcc-chat" nil
1183 (plist-get entry :ip)
1184 (string-to-number (plist-get entry :port))
1185 entry))
1186 ;; XXX: connected, should we kill the ip/port properties?
1187 (setq entry (plist-put entry :peer proc))
1188 (setq entry (plist-put entry :parent parent-proc))
1189 (set-process-filter proc 'erc-dcc-chat-filter)
1190 (set-process-sentinel proc 'erc-dcc-chat-sentinel)
1191 (setq buffer (erc-dcc-chat-setup entry))))
1193 (defun erc-dcc-chat-filter (proc str)
1194 (let ((orig-buffer (current-buffer)))
1195 (unwind-protect
1196 (progn
1197 (set-buffer (process-buffer proc))
1198 (setq erc-dcc-unprocessed-output
1199 (concat erc-dcc-unprocessed-output str))
1200 (run-hook-with-args 'erc-dcc-chat-filter-functions
1201 proc erc-dcc-unprocessed-output))
1202 (set-buffer orig-buffer))))
1204 (defun erc-dcc-chat-parse-output (proc str)
1205 (save-match-data
1206 (let ((posn 0)
1207 line)
1208 (while (string-match "\n" str posn)
1209 (setq line (substring str posn (match-beginning 0)))
1210 (setq posn (match-end 0))
1211 (erc-display-message
1212 nil nil proc
1213 'dcc-chat-privmsg ?n (erc-propertize erc-dcc-from 'face
1214 'erc-nick-default-face) ?m line))
1215 (setq erc-dcc-unprocessed-output (substring str posn)))))
1217 (defun erc-dcc-chat-buffer-killed ()
1218 (erc-dcc-chat-close "killed buffer"))
1220 (defun erc-dcc-chat-close (&optional event)
1221 "Close a DCC chat, removing any associated processes and tidying up
1222 `erc-dcc-list'"
1223 (let ((proc (plist-get erc-dcc-entry-data :peer))
1224 (evt (or event "")))
1225 (when proc
1226 (setq erc-dcc-list (delq erc-dcc-entry-data erc-dcc-list))
1227 (run-hook-with-args 'erc-dcc-chat-exit-hook proc)
1228 (delete-process proc)
1229 (erc-display-message
1230 nil 'notice erc-server-process
1231 'dcc-chat-ended ?n erc-dcc-from ?t (current-time-string) ?e evt)
1232 (setq erc-dcc-entry-data (plist-put erc-dcc-entry-data :peer nil)))))
1234 (defun erc-dcc-chat-sentinel (proc event)
1235 (let ((buf (current-buffer))
1236 (elt (erc-dcc-member :peer proc)))
1237 ;; the sentinel is also notified when the connection is opened, so don't
1238 ;; immediately kill it again
1239 ;(message "buf %s elt %S evt %S" buf elt event)
1240 (unwind-protect
1241 (if (string-match "^open from" event)
1242 (erc-dcc-chat-setup elt)
1243 (erc-dcc-chat-close event))
1244 (set-buffer buf))))
1246 (defun erc-dcc-no-such-nick (proc parsed)
1247 "Detect and handle no-such-nick replies from the IRC server."
1248 (let* ((elt (erc-dcc-member :nick (nth 1 (erc-response.command-args parsed))
1249 :parent proc))
1250 (peer (plist-get elt :peer)))
1251 (when (or (and (processp peer) (not (eq (process-status peer) 'open)))
1252 elt)
1253 ;; Since we already created an entry before sending the CTCP
1254 ;; message, we now remove it, if it doesn't point to a process
1255 ;; which is already open.
1256 (setq erc-dcc-list (delq elt erc-dcc-list))
1257 (if (processp peer) (delete-process peer)))
1258 nil))
1260 (provide 'erc-dcc)
1262 ;;; erc-dcc.el ends here
1264 ;; Local Variables:
1265 ;; indent-tabs-mode: nil
1266 ;; End: