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1 | ;;; erc-identd.el --- RFC1413 (identd authentication protocol) server |
2 | ||
92ed2bfb | 3 | ;; Copyright (C) 2003, 2006 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 | ||
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 | ||
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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. | |
597993cf | 29 | |
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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 | |
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38 | |
39 | ;;; Code: | |
40 | ||
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41 | (require 'erc) |
42 | ||
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43 | (defvar erc-identd-process nil) |
44 | ||
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45 | ;;;###autoload (autoload 'erc-identd-mode "erc-identd") |
46 | (define-erc-module identd nil | |
47 | "This mode launches an identd server on port 8113." | |
48 | ((add-hook 'erc-connect-pre-hook 'erc-identd-start) | |
49 | (add-hook 'erc-disconnected-hook 'erc-identd-stop)) | |
50 | ((remove-hook 'erc-connect-pre-hook 'erc-identd-start) | |
51 | (remove-hook 'erc-disconnected-hook 'erc-identd-stop))) | |
52 | ||
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53 | (defun erc-identd-filter (proc string) |
54 | "This filter implements RFC1413 (identd authentication protocol)." | |
55 | (let ((erc-identd-process proc)) | |
56 | (when (string-match "\\([0-9]+\\)\\s-*,\\s-*\\([0-9]+\\)" string) | |
57 | (let ((port-on-server (match-string 1 string)) | |
58 | (port-on-client (match-string 2 string))) | |
59 | (send-string erc-identd-process | |
60 | (format "%s, %s : USERID : %s : %s\n" | |
61 | port-on-server port-on-client | |
62 | system-type (user-login-name))) | |
63 | (process-send-eof erc-identd-process))))) | |
64 | ||
c89e5cd7 | 65 | ;;;###autoload |
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66 | (defun erc-identd-start (&optional port) |
67 | "Start an identd server listening to port 8113. | |
68 | Port 113 (auth) will need to be redirected to port 8113 on your | |
69 | machine -- using iptables, or a program like redir which can be | |
70 | run from inetd. The idea is to provide a simple identd server | |
71 | when you need one, without having to install one globally on your | |
72 | system." | |
73 | (interactive (list (read-string "Serve identd requests on port: " "8113"))) | |
74 | (if (null port) | |
75 | (setq port 8113) | |
76 | (if (stringp port) | |
77 | (setq port (string-to-number port)))) | |
78 | (if erc-identd-process | |
79 | (delete-process erc-identd-process)) | |
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80 | (setq erc-identd-process |
81 | (make-network-process :name "identd" | |
0b6bb130 | 82 | :buffer nil |
c89e5cd7 | 83 | :host 'local :service port |
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84 | :server t :noquery t :nowait t |
85 | :filter 'erc-identd-filter)) | |
86 | (set-process-query-on-exit-flag erc-identd-process nil)) | |
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87 | |
88 | ;;;###autoload | |
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89 | (defun erc-identd-stop (&rest ignore) |
90 | (interactive) | |
91 | (when erc-identd-process | |
92 | (delete-process erc-identd-process) | |
93 | (setq erc-identd-process nil))) | |
94 | ||
95 | (provide 'erc-identd) | |
96 | ||
97 | ;;; erc-identd.el ends here | |
98 | ;; | |
99 | ;; Local Variables: | |
100 | ;; indent-tabs-mode: t | |
101 | ;; tab-width: 8 | |
102 | ;; End: | |
103 | ||
104 | ;; arch-tag: e0b5f926-0f35-40b9-8ddb-ca06b62a7544 |