1;;; erc-identd.el --- RFC1413 (identd authentication protocol) server 2 3;; Copyright (C) 2003, 2006, 2007 Free Software Foundation, Inc. 4 5;; Author: John Wiegley <johnw@gnu.org> 6;; Keywords: comm, processes 7 8;; This file is part of GNU Emacs. 9 10;; GNU Emacs is free software; you can redistribute it and/or modify 11;; it under the terms of the GNU General Public License as published by 12;; the Free Software Foundation; either version 2, or (at your option) 13;; any later version. 14 15;; GNU Emacs is distributed in the hope that it will be useful, 16;; but WITHOUT ANY WARRANTY; without even the implied warranty of 17;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18;; GNU General Public License for more details. 19 20;; You should have received a copy of the GNU General Public License 21;; along with GNU Emacs; see the file COPYING. If not, write to the 22;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 23;; Boston, MA 02110-1301, USA. 24 25;;; Commentary: 26 27;; This module allows you to run a local identd server on port 8113. 28;; You will need to set up DNAT to bind 113->8113, or use a proxy. 29 30;; To use this module, add identd to `erc-modules' and run 31;; `erc-update-modules'. 32 33;; Here is an example /etc/inetd.conf rule that forwards identd 34;; traffic to port 8113. You will need simpleproxy installed for it 35;; to work. 36 37;; 113 stream tcp nowait nobody /usr/sbin/tcpd /usr/bin/simpleproxy simpleproxy -i -R 127.0.0.1:8113 38 39;;; Code: 40 41(require 'erc) 42 43(defvar erc-identd-process nil) 44 45(defgroup erc-identd nil 46 "Run a local identd server." 47 :group 'erc) 48 49(defcustom erc-identd-port 8113 50 "Port to run the identd server on if not specified in the argument for 51`erc-identd-start'. 52 53This can be either a string or a number." 54 :group 'erc-identd 55 :type '(choice (const :tag "None" nil) 56 (integer :tag "Port number") 57 (string :tag "Port string"))) 58 59;;;###autoload (autoload 'erc-identd-mode "erc-identd") 60(define-erc-module identd nil 61 "This mode launches an identd server on port 8113." 62 ((add-hook 'erc-connect-pre-hook 'erc-identd-quickstart) 63 (add-hook 'erc-disconnected-hook 'erc-identd-stop)) 64 ((remove-hook 'erc-connect-pre-hook 'erc-identd-quickstart) 65 (remove-hook 'erc-disconnected-hook 'erc-identd-stop))) 66 67(defun erc-identd-filter (proc string) 68 "This filter implements RFC1413 (identd authentication protocol)." 69 (let ((erc-identd-process proc)) 70 (when (string-match "\\([0-9]+\\)\\s-*,\\s-*\\([0-9]+\\)" string) 71 (let ((port-on-server (match-string 1 string)) 72 (port-on-client (match-string 2 string))) 73 (send-string erc-identd-process 74 (format "%s, %s : USERID : %s : %s\n" 75 port-on-server port-on-client 76 system-type (user-login-name))) 77 (process-send-eof erc-identd-process))))) 78 79;;;###autoload 80(defun erc-identd-start (&optional port) 81 "Start an identd server listening to port 8113. 82Port 113 (auth) will need to be redirected to port 8113 on your 83machine -- using iptables, or a program like redir which can be 84run from inetd. The idea is to provide a simple identd server 85when you need one, without having to install one globally on your 86system." 87 (interactive (list (read-string "Serve identd requests on port: " "8113"))) 88 (unless port (setq port erc-identd-port)) 89 (when (stringp port) 90 (setq port (string-to-number port))) 91 (when erc-identd-process 92 (delete-process erc-identd-process)) 93 (setq erc-identd-process 94 (make-network-process :name "identd" 95 :buffer nil 96 :host 'local :service port 97 :server t :noquery t :nowait t 98 :filter 'erc-identd-filter)) 99 (set-process-query-on-exit-flag erc-identd-process nil)) 100 101(defun erc-identd-quickstart (&rest ignored) 102 "Start the identd server with the default port. 103The default port is specified by `erc-identd-port'." 104 (erc-identd-start)) 105 106;;;###autoload 107(defun erc-identd-stop (&rest ignore) 108 (interactive) 109 (when erc-identd-process 110 (delete-process erc-identd-process) 111 (setq erc-identd-process nil))) 112 113(provide 'erc-identd) 114 115;;; erc-identd.el ends here 116;; 117;; Local Variables: 118;; indent-tabs-mode: t 119;; tab-width: 8 120;; End: 121 122;; arch-tag: e0b5f926-0f35-40b9-8ddb-ca06b62a7544 123