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

   1 /* -*-c-*-
   2  *
   3  * $Id: source.c,v 1.1 1999/07/26 23:33:01 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 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: source.c,v $
  32  * Revision 1.1  1999/07/26 23:33:01  mdw
  33  * Infrastructure for the new design.
  34  *
  35  */
  36
  37 /*----- Header files ------------------------------------------------------*/
  38
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42
  43 #include "source.h"
  44
  45 /*----- Static variables --------------------------------------------------*/
  46
  47 static source *sources = 0;
  48
  49 /*----- Main code ---------------------------------------------------------*/
  50
  51 /* --- @source_add@ --- *
  52  *
  53  * Arguments:   @source *s@ = pointer to a source
  54  *
  55  * Returns:     ---
  56  *
  57  * Use:         Adds a source to the master list.  Only do this for passive
  58  *              sources (e.g., listening sockets), not active sources (e.g.,
  59  *              executable programs).
  60  */
  61
  62 void source_add(source *s)
  63 {
  64   s->next = sources;
  65   s->prev = 0;
  66   if (sources)
  67     sources->prev = s;
  68   sources = s;
  69 }
  70
  71 /* --- @source_remove@ --- *
  72  *
  73  * Arguments:   @source *s@ = pointer to a source
  74  *
  75  * Returns:     ---
  76  *
  77  * Use:         Removes a source from the master list.
  78  */
  79
  80 void source_remove(source *s)
  81 {
  82   if (s->next)
  83     s->next->prev = s->prev;
  84   if (s->prev)
  85     s->prev->next = s->next;
  86   else
  87     sources = s->next;
  88 }
  89
  90 /* --- @source_killall@ --- *
  91  *
  92  * Arguments:   ---
  93  *
  94  * Returns:     ---
  95  *
  96  * Use:         Frees all sources.
  97  */
  98
  99 void source_killall(void)
 100 {
 101   source *s = sources;
 102   while (s) {
 103     source *ss = s;
 104     s = s->next;
 105     ss->ops->destroy(ss);
 106   }
 107   sources = 0;
 108 }
 109
 110 /*----- That's all, folks -------------------------------------------------*/