;;; erc-identd.el --- RFC1413 (identd authentication protocol) server ;; Copyright (C) 2003, 2006-2012 Free Software Foundation, Inc. ;; Author: John Wiegley ;; Keywords: comm, processes ;; This file is part of GNU Emacs. ;; GNU Emacs is free software: you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation, either version 3 of the License, or ;; (at your option) any later version. ;; GNU Emacs is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with GNU Emacs. If not, see . ;;; Commentary: ;; This module allows you to run a local identd server on port 8113. ;; You will need to set up DNAT to bind 113->8113, or use a proxy. ;; To use this module, add identd to `erc-modules' and run ;; `erc-update-modules'. ;; Here is an example /etc/inetd.conf rule that forwards identd ;; traffic to port 8113. You will need simpleproxy installed for it ;; to work. ;; 113 stream tcp nowait nobody /usr/sbin/tcpd /usr/bin/simpleproxy simpleproxy -i -R 127.0.0.1:8113 ;;; Code: (require 'erc) (defvar erc-identd-process nil) (defgroup erc-identd nil "Run a local identd server." :group 'erc) (defcustom erc-identd-port 8113 "Port to run the identd server on if not specified in the argument for `erc-identd-start'. This can be either a string or a number." :group 'erc-identd :type '(choice (const :tag "None" nil) (integer :tag "Port number") (string :tag "Port string"))) ;;;###autoload (autoload 'erc-identd-mode "erc-identd") (define-erc-module identd nil "This mode launches an identd server on port 8113." ((add-hook 'erc-connect-pre-hook 'erc-identd-quickstart) (add-hook 'erc-disconnected-hook 'erc-identd-stop)) ((remove-hook 'erc-connect-pre-hook 'erc-identd-quickstart) (remove-hook 'erc-disconnected-hook 'erc-identd-stop))) (defun erc-identd-filter (proc string) "This filter implements RFC1413 (identd authentication protocol)." (let ((erc-identd-process proc)) (when (string-match "\\([0-9]+\\)\\s-*,\\s-*\\([0-9]+\\)" string) (let ((port-on-server (match-string 1 string)) (port-on-client (match-string 2 string))) (send-string erc-identd-process (format "%s, %s : USERID : %s : %s\n" port-on-server port-on-client system-type (user-login-name))) (stop-process erc-identd-process) (delete-process proc))))) ;;;###autoload (defun erc-identd-start (&optional port) "Start an identd server listening to port 8113. Port 113 (auth) will need to be redirected to port 8113 on your machine -- using iptables, or a program like redir which can be run from inetd. The idea is to provide a simple identd server when you need one, without having to install one globally on your system." (interactive (list (read-string "Serve identd requests on port: " "8113"))) (unless port (setq port erc-identd-port)) (when (stringp port) (setq port (string-to-number port))) (when erc-identd-process (delete-process erc-identd-process)) (setq erc-identd-process (make-network-process :name "identd" :buffer nil :host 'local :service port :server t :noquery t :nowait t :filter 'erc-identd-filter)) (set-process-query-on-exit-flag erc-identd-process nil)) (defun erc-identd-quickstart (&rest ignored) "Start the identd server with the default port. The default port is specified by `erc-identd-port'." (erc-identd-start)) ;;;###autoload (defun erc-identd-stop (&rest ignore) (interactive) (when erc-identd-process (delete-process erc-identd-process) (setq erc-identd-process nil))) (provide 'erc-identd) ;;; erc-identd.el ends here ;; ;; Local Variables: ;; indent-tabs-mode: t ;; tab-width: 8 ;; End: