mdw@git.distorted.org.uk Git - fwd/blob - source.c

   1 /* -*-c-*-
   2  *
   3  * $Id: source.c,v 1.2 2004/04/08 01:36:25 mdw Exp $
   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
  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 -------------------------------------------------*/