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1 | ;;; erc-identd.el --- RFC1413 (identd authentication protocol) server |
2 | ||
49f70d46 | 3 | ;; Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. |
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4 | |
5 | ;; Author: John Wiegley <johnw@gnu.org> | |
6 | ;; Keywords: comm, processes | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
4ee57b2a | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
597993cf | 11 | ;; it under the terms of the GNU General Public License as published by |
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12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) any later version. | |
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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 | |
4ee57b2a | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
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22 | |
23 | ;;; Commentary: | |
24 | ||
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25 | ;; This module allows you to run a local identd server on port 8113. |
26 | ;; You will need to set up DNAT to bind 113->8113, or use a proxy. | |
597993cf | 27 | |
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28 | ;; To use this module, add identd to `erc-modules' and run |
29 | ;; `erc-update-modules'. | |
30 | ||
31 | ;; Here is an example /etc/inetd.conf rule that forwards identd | |
32 | ;; traffic to port 8113. You will need simpleproxy installed for it | |
33 | ;; to work. | |
34 | ||
35 | ;; 113 stream tcp nowait nobody /usr/sbin/tcpd /usr/bin/simpleproxy simpleproxy -i -R 127.0.0.1:8113 | |
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36 | |
37 | ;;; Code: | |
38 | ||
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39 | (require 'erc) |
40 | ||
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41 | (defvar erc-identd-process nil) |
42 | ||
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43 | (defgroup erc-identd nil |
44 | "Run a local identd server." | |
45 | :group 'erc) | |
46 | ||
47 | (defcustom erc-identd-port 8113 | |
48 | "Port to run the identd server on if not specified in the argument for | |
49 | `erc-identd-start'. | |
50 | ||
51 | This can be either a string or a number." | |
52 | :group 'erc-identd | |
53 | :type '(choice (const :tag "None" nil) | |
54 | (integer :tag "Port number") | |
55 | (string :tag "Port string"))) | |
56 | ||
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57 | ;;;###autoload (autoload 'erc-identd-mode "erc-identd") |
58 | (define-erc-module identd nil | |
59 | "This mode launches an identd server on port 8113." | |
ff59d266 | 60 | ((add-hook 'erc-connect-pre-hook 'erc-identd-quickstart) |
0b6bb130 | 61 | (add-hook 'erc-disconnected-hook 'erc-identd-stop)) |
ff59d266 | 62 | ((remove-hook 'erc-connect-pre-hook 'erc-identd-quickstart) |
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63 | (remove-hook 'erc-disconnected-hook 'erc-identd-stop))) |
64 | ||
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65 | (defun erc-identd-filter (proc string) |
66 | "This filter implements RFC1413 (identd authentication protocol)." | |
67 | (let ((erc-identd-process proc)) | |
68 | (when (string-match "\\([0-9]+\\)\\s-*,\\s-*\\([0-9]+\\)" string) | |
69 | (let ((port-on-server (match-string 1 string)) | |
70 | (port-on-client (match-string 2 string))) | |
71 | (send-string erc-identd-process | |
72 | (format "%s, %s : USERID : %s : %s\n" | |
73 | port-on-server port-on-client | |
74 | system-type (user-login-name))) | |
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75 | (stop-process erc-identd-process) |
76 | (delete-process proc))))) | |
597993cf | 77 | |
c89e5cd7 | 78 | ;;;###autoload |
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79 | (defun erc-identd-start (&optional port) |
80 | "Start an identd server listening to port 8113. | |
81 | Port 113 (auth) will need to be redirected to port 8113 on your | |
82 | machine -- using iptables, or a program like redir which can be | |
83 | run from inetd. The idea is to provide a simple identd server | |
84 | when you need one, without having to install one globally on your | |
85 | system." | |
86 | (interactive (list (read-string "Serve identd requests on port: " "8113"))) | |
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87 | (unless port (setq port erc-identd-port)) |
88 | (when (stringp port) | |
89 | (setq port (string-to-number port))) | |
90 | (when erc-identd-process | |
91 | (delete-process erc-identd-process)) | |
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92 | (setq erc-identd-process |
93 | (make-network-process :name "identd" | |
0b6bb130 | 94 | :buffer nil |
c89e5cd7 | 95 | :host 'local :service port |
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96 | :server t :noquery t :nowait t |
97 | :filter 'erc-identd-filter)) | |
98 | (set-process-query-on-exit-flag erc-identd-process nil)) | |
c89e5cd7 | 99 | |
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100 | (defun erc-identd-quickstart (&rest ignored) |
101 | "Start the identd server with the default port. | |
102 | The default port is specified by `erc-identd-port'." | |
103 | (erc-identd-start)) | |
104 | ||
c89e5cd7 | 105 | ;;;###autoload |
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106 | (defun erc-identd-stop (&rest ignore) |
107 | (interactive) | |
108 | (when erc-identd-process | |
109 | (delete-process erc-identd-process) | |
110 | (setq erc-identd-process nil))) | |
111 | ||
112 | (provide 'erc-identd) | |
113 | ||
114 | ;;; erc-identd.el ends here | |
115 | ;; | |
116 | ;; Local Variables: | |
117 | ;; indent-tabs-mode: t | |
118 | ;; tab-width: 8 | |
119 | ;; End: | |
120 | ||
121 | ;; arch-tag: e0b5f926-0f35-40b9-8ddb-ca06b62a7544 |