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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: source.c,v 1.2 2004/04/08 01:36:25 mdw Exp $ |
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4 | * |
5 | * Standard routines for forwarding sources |
6 | * |
7 | * (c) 1999 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of the `fw' port forwarder. |
13 | * |
14 | * `fw' is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU General Public License as published by |
16 | * the Free Software Foundation; either version 2 of the License, or |
17 | * (at your option) any later version. |
18 | * |
19 | * `fw' is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU General Public License |
25 | * along with `fw'; if not, write to the Free Software Foundation, |
26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
27 | */ |
28 | |
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29 | /*----- Header files ------------------------------------------------------*/ |
30 | |
31 | #include <stdio.h> |
32 | #include <stdlib.h> |
33 | #include <string.h> |
34 | |
35 | #include "source.h" |
36 | |
37 | /*----- Static variables --------------------------------------------------*/ |
38 | |
39 | static source *sources = 0; |
40 | |
41 | /*----- Main code ---------------------------------------------------------*/ |
42 | |
43 | /* --- @source_add@ --- * |
44 | * |
45 | * Arguments: @source *s@ = pointer to a source |
46 | * |
47 | * Returns: --- |
48 | * |
49 | * Use: Adds a source to the master list. Only do this for passive |
50 | * sources (e.g., listening sockets), not active sources (e.g., |
51 | * executable programs). |
52 | */ |
53 | |
54 | void source_add(source *s) |
55 | { |
56 | s->next = sources; |
57 | s->prev = 0; |
58 | if (sources) |
59 | sources->prev = s; |
60 | sources = s; |
61 | } |
62 | |
63 | /* --- @source_remove@ --- * |
64 | * |
65 | * Arguments: @source *s@ = pointer to a source |
66 | * |
67 | * Returns: --- |
68 | * |
69 | * Use: Removes a source from the master list. |
70 | */ |
71 | |
72 | void source_remove(source *s) |
73 | { |
74 | if (s->next) |
75 | s->next->prev = s->prev; |
76 | if (s->prev) |
77 | s->prev->next = s->next; |
78 | else |
79 | sources = s->next; |
80 | } |
81 | |
82 | /* --- @source_killall@ --- * |
83 | * |
84 | * Arguments: --- |
85 | * |
86 | * Returns: --- |
87 | * |
88 | * Use: Frees all sources. |
89 | */ |
90 | |
91 | void source_killall(void) |
92 | { |
93 | source *s = sources; |
94 | while (s) { |
95 | source *ss = s; |
96 | s = s->next; |
97 | ss->ops->destroy(ss); |
98 | } |
99 | sources = 0; |
100 | } |
101 | |
102 | /*----- That's all, folks -------------------------------------------------*/ |