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

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