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   1 ;;; riece-rdcc.el --- ruby implementation of DCC add-on
   2 ;; Copyright (C) 1998-2003 Daiki Ueno
   3
   4 ;; Author: Daiki Ueno <ueno@unixuser.org>
   5 ;; Keywords: IRC, riece
   6
   7 ;; This file is part of Riece.
   8
   9 ;; This program is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 2, or (at your option)
  12 ;; any later version.
  13
  14 ;; This program is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 ;; Boston, MA 02111-1307, USA.
  23
  24 ;;; Code:
  25
  26 (require 'riece-globals)
  27 (require 'riece-misc)
  28 (require 'riece-channel)
  29 (require 'riece-identity)
  30
  31 (defgroup riece-rdcc nil
  32   "DCC implementation using ruby"
  33   :prefix "riece-"
  34   :group 'riece)
  35
  36 (defcustom riece-rdcc-server-address nil
  37   "Local address of the DCC server.
  38 Only used for sending files."
  39   :type 'string
  40   :group 'riece-rdcc)
  41
  42 (defcustom riece-rdcc-ruby-command "ruby"
  43   "Command name for Ruby interpreter."
  44   :type 'string
  45   :group 'riece-rdcc)
  46
  47 (defcustom riece-rdcc-send-program
  48   '("\
  49 address = " address "
  50 unless address
  51   sock = UDPSocket.new
  52   sock.connect('164.46.176.4', 7)               # www.unixuser.org/echo
  53   address = sock.getsockname[4 .. 7].unpack('CCCC').join('.')
  54 end
  55 server = TCPServer.new(address, 0)
  56 puts(\"#{server.addr[3].split(/\\./).collect{|c| c.to_i}.pack('CCCC').unpack('N')[0]} #{server.addr[1]}\")
  57 session = server.accept
  58 if session
  59   total = 0
  60   File.open(" file ") {|file|
  61     while (bytes = file.read(4096))
  62       total += bytes.length
  63       puts(\"#{total}\")
  64       session.write(bytes)
  65     end
  66   }
  67   session.close
  68 end
  69 ")
  70   "Ruby program to send file with DCC."
  71   :type 'list
  72   :group 'riece-rdcc)
  73
  74 (defcustom riece-rdcc-decode-address-program
  75   '("\
  76 puts(\"#{" address " >> 24 & 0xFF}.#{" address " >> 16 & 0xFF}.#{"
  77     address " >> 8 & 0xFF}.#{" address " & 0xFF}\")")
  78   "Ruby program to numeric IP address."
  79   :type 'list
  80   :group 'riece-rdcc)
  81
  82 (defvar riece-rdcc-requests nil)
  83
  84 (defvar riece-rdcc-request-user nil)
  85 (defvar riece-rdcc-request-file nil)
  86 (defvar riece-rdcc-request-size nil)
  87
  88 (defvar jka-compr-compression-info-list)
  89 (defvar jam-zcat-filename-list)
  90 (defun riece-rdcc-substitute-variables (program variable value)
  91   (setq program (copy-sequence program))
  92   (let ((pointer program))
  93     (while pointer
  94       (setq pointer (memq variable program))
  95       (if pointer
  96           (setcar pointer value)))
  97     program))
  98
  99 (defun riece-rdcc-server-filter (process input)
 100   (save-excursion
 101     (set-buffer (process-buffer process))
 102     (goto-char (point-max))
 103     (insert input)
 104     (goto-char (point-min))
 105     (while (and (not (eobp))
 106                 (looking-at "\\([0-9]+\\)\n"))
 107       (message "Sending %s...(%s/%d)"
 108                riece-rdcc-request-file
 109                (match-string 1) riece-rdcc-request-size)
 110       (forward-line))
 111     (unless (eobp)
 112       (delete-region (point-min) (point)))))
 113
 114 (defun riece-rdcc-server-sentinel (process status)
 115   (with-current-buffer (process-buffer process)
 116     (message "Sending %s...done" riece-rdcc-request-file))
 117   (kill-buffer (process-buffer process))
 118   (delete-process process))
 119
 120 (defun riece-command-dcc-send (user file)
 121   (interactive
 122    (let ((completion-ignore-case t))
 123      (list (completing-read
 124             "User: "
 125             (mapcar #'list (riece-get-users-on-server)))
 126            (expand-file-name (read-file-name "File: ")))))
 127   (let ((process
 128          (start-process "DCC send" " *DCC send*" "ruby" "-rsocket")))
 129     (process-send-string process
 130                          (apply #'concat
 131                                 (riece-rdcc-substitute-variables
 132                                  (riece-rdcc-substitute-variables
 133                                   riece-rdcc-send-program
 134                                   'address
 135                                   (if riece-rdcc-server-address
 136                                       (concat "'" riece-rdcc-server-address
 137                                               "'")
 138                                     "nil"))
 139                                  'file
 140                                  (concat "'" file "'"))))
 141     (process-send-eof process)
 142     (save-excursion
 143       (set-buffer (process-buffer process))
 144       (while (and (eq (process-status process) 'run)
 145                   (progn
 146                     (goto-char (point-min))
 147                     (not (looking-at "\\([0-9]+\\) \\([0-9]+\\)"))))
 148         (accept-process-output))
 149       (if (eq (process-status process) 'run)
 150           (let ((address (match-string 1))
 151                 (port (match-string 2)))
 152             (erase-buffer)
 153             (make-local-variable 'riece-rdcc-request-size)
 154             (setq riece-rdcc-request-file file
 155                   riece-rdcc-request-size (nth 7 (file-attributes file)))
 156             (set-buffer-modified-p nil)
 157             (set-process-filter process #'riece-rdcc-server-filter)
 158             (set-process-sentinel process #'riece-rdcc-server-sentinel)
 159             (riece-send-string
 160              (format "PRIVMSG %s :\1DCC SEND %s %s %s %d\1\r\n"
 161                      user (file-name-nondirectory file)
 162                      address port
 163                      riece-rdcc-request-size)))))))
 164
 165 (defun riece-rdcc-filter (process input)
 166   (save-excursion
 167     (set-buffer (process-buffer process))
 168     (goto-char (point-max))
 169     (insert input)
 170     (message "Receiving %s from %s...(%d/%d)"
 171              (file-name-nondirectory riece-rdcc-request-file)
 172              riece-rdcc-request-user
 173              (1- (point))
 174              riece-rdcc-request-size)))
 175
 176 (defun riece-rdcc-sentinel (process status)
 177   (save-excursion
 178     (set-buffer (process-buffer process))
 179     (unless (= (buffer-size) riece-rdcc-request-size)
 180       (error "Premature end of file"))
 181     (message "Receiving %s from %s...done"
 182              (file-name-nondirectory riece-rdcc-request-file)
 183              riece-rdcc-request-user)
 184     (let ((coding-system-for-write 'binary)
 185           jka-compr-compression-info-list jam-zcat-filename-list)
 186       (write-region (point-min) (point-max) riece-rdcc-request-file)))
 187   (kill-buffer (process-buffer process))
 188   (delete-process process))
 189
 190 (defun riece-rdcc-decode-address (address)
 191   (with-temp-buffer
 192     (call-process riece-rdcc-ruby-command nil t nil "-e"
 193                   (apply #'concat
 194                          (riece-rdcc-substitute-variables
 195                           riece-rdcc-decode-address-program
 196                           'address
 197                           address)))
 198     (buffer-substring (point-min) (1- (point-max)))))
 199
 200 (defun riece-command-dcc-receive (request file)
 201   (interactive
 202    (progn
 203      (unless riece-rdcc-requests
 204        (error "No request"))
 205      (let* ((request
 206              (if (= (length riece-rdcc-requests) 1)
 207                  (car riece-rdcc-requests)
 208                (with-output-to-temp-buffer "*Help*"
 209                  (let ((requests riece-rdcc-requests)
 210                        (index 1))
 211                    (while requests
 212                      (princ (format "%2d: %s %s (%d bytes)\n"
 213                                     index
 214                                     (car (car requests))
 215                                     (nth 1 (car requests))
 216                                     (nth 4 (car requests))))
 217                      (setq index (1+ index)
 218                            requests (cdr requests)))))
 219                (let ((number (read-string "Request#: ")))
 220                  (unless (string-match "^[0-9]+$" number)
 221                    (error "Not a number"))
 222                  (if (or (> (setq number (string-to-number number))
 223                             (length riece-rdcc-requests))
 224                          (< number 1))
 225                      (error "Invalid number"))
 226                  (nth (1- number) riece-rdcc-requests))))
 227             (default-name (expand-file-name
 228                            (nth 1 request) default-directory)))
 229        (list request
 230              (expand-file-name
 231               (read-file-name
 232                (concat "Save as (default "
 233                        (file-name-nondirectory default-name) ") ")
 234                (file-name-directory default-name)
 235                default-name))))))
 236   (let* (selective-display
 237          (coding-system-for-read 'binary)
 238          (coding-system-for-write 'binary)
 239          (process (open-network-stream
 240                    "DCC receive" " *DCC receive*"
 241                    (riece-rdcc-decode-address (nth 2 request))
 242                    (nth 3 request))))
 243     (setq riece-rdcc-requests (delq request riece-rdcc-requests))
 244     (with-current-buffer (process-buffer process)
 245       (if (fboundp 'set-buffer-multibyte)
 246           (set-buffer-multibyte nil))
 247       (buffer-disable-undo)
 248       (erase-buffer)
 249       (make-local-variable 'riece-rdcc-request-user)
 250       (setq riece-rdcc-request-user (car request))
 251       (make-local-variable 'riece-rdcc-request-file)
 252       (setq riece-rdcc-request-file file)
 253       (make-local-variable 'riece-rdcc-request-size)
 254       (setq riece-rdcc-request-size (nth 4 request)))
 255     (set-process-filter process #'riece-rdcc-filter)
 256     (set-process-sentinel process #'riece-rdcc-sentinel)))
 257
 258 (defun riece-handle-dcc-request (prefix target message)
 259   (let ((case-fold-search t))
 260     (when (string-match
 261            "SEND \\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\)"
 262            message)
 263       (let ((file (match-string 1 message))
 264             (address (match-string 2 message))
 265             (port (string-to-number (match-string 3 message)))
 266             (size (string-to-number (match-string 4 message)))
 267             (buffer (if (riece-channel-p target)
 268                         (cdr (riece-identity-assoc-no-server
 269                               (riece-make-identity target)
 270                               riece-channel-buffer-alist))))
 271             (user (riece-prefix-nickname prefix)))
 272         (setq riece-rdcc-requests
 273               (cons (list user file address port size)
 274                     riece-rdcc-requests))
 275         (riece-insert-change buffer (format "DCC SEND from %s\n" user))
 276         (riece-insert-change
 277          (if (and riece-channel-buffer-mode
 278                   (not (eq buffer riece-channel-buffer)))
 279              (list riece-dialogue-buffer riece-others-buffer)
 280            riece-dialogue-buffer)
 281          (concat
 282           (riece-concat-server-name
 283            (format "DCC SEND from %s (%s) to %s"
 284                    user
 285                    (riece-strip-user-at-host
 286                     (riece-prefix-user-at-host prefix))
 287                    target))
 288           "\n")))
 289       t)))
 290
 291 (defun riece-rdcc-requires ()
 292   '(riece-ctcp))
 293
 294 (defvar riece-dialogue-mode-map)
 295 (defun riece-rdcc-insinuate ()
 296   (add-hook 'riece-ctcp-dcc-request-hook 'riece-handle-dcc-request)
 297   (define-key riece-dialogue-mode-map "\C-ds" 'riece-command-dcc-send)
 298   (define-key riece-dialogue-mode-map "\C-dr" 'riece-command-dcc-receive))
 299
 300 (provide 'riece-rdcc)
 301
 302 ;;; riece-rdcc.el ends here