mdw@git.distorted.org.uk Git - fwd/blame

Commit	Line	Data
07d71f34	1	/* --c--
07d71f34	2	*
07d71f34	3	* Standard routines for forwarding sources
	4	*
	5	* (c) 1999 Straylight/Edgeware
	6	*/
	7
206212ca	8	/----- Licensing notice --------------------------------------------------
07d71f34	9	*
9155ea97	10	* This file is part of the `fwd' port forwarder.
07d71f34	11	*
9155ea97	12	* `fwd' is free software; you can redistribute it and/or modify
07d71f34	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.
206212ca	16	*
9155ea97	17	* `fwd' is distributed in the hope that it will be useful,
07d71f34	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.
206212ca	21	*
07d71f34	22	* You should have received a copy of the GNU General Public License
9155ea97	23	* along with `fwd'; if not, write to the Free Software Foundation,
07d71f34	24	* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	25	*/
	26
9155ea97	27	#include "fwd.h"
07d71f34	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	{
57ceb980 MW	48	assert(s->ops->shutdown);
57ceb980 MW	49	assert(!(s->f&SF_ACTIVE));
07d71f34	50	s->next = sources;
	51	s->prev = 0;
	52	if (sources)
	53	sources->prev = s;
	54	sources = s;
57ceb980 MW	55	s->f \|= SF_ACTIVE;
57ceb980 MW	56	source_inc(s);
07d71f34	57	}
	58
	59	/* --- @source_remove@ --- *
	60	*
	61	* Arguments: @source *s@ = pointer to a source
	62	*
	63	* Returns: ---
	64	*
	65	* Use: Removes a source from the master list.
	66	*/
	67
	68	void source_remove(source *s)
	69	{
57ceb980	70	assert(s->f&SF_ACTIVE);
07d71f34	71	if (s->next)
	72	s->next->prev = s->prev;
	73	if (s->prev)
	74	s->prev->next = s->next;
	75	else
	76	sources = s->next;
57ceb980 MW	77	s->f &= ~SF_ACTIVE;
	78	source_dec(s);
	79	}
	80
	81	/* --- @source_inc@ --- *
	82	*
	83	* Arguments: @source *s@ = pointer to a source
	84	*
	85	* Returns: ---
	86	*
	87	* Use: Increments a source's refcount.
	88	*/
	89
	90	void source_inc(source *s) { s->ref++; }
	91
	92	/* --- @source_dec@ --- *
	93	*
	94	* Arguments: @source *s@ = pointer to a source
	95	*
	96	* Returns: ---
	97	*
	98	* Use: Decrements a source's refcount, destroying it if necessary.
	99	*/
	100
	101	void source_dec(source *s)
	102	{
	103	assert(s->ref > 0);
	104	s->ref--;
	105	if (!s->ref) {
	106	if (s->f&SF_ACTIVE) s->ops->shutdown(s);
	107	s->ops->destroy(s);
	108	}
07d71f34	109	}
	110
	111	/* --- @source_killall@ --- *
	112	*
	113	* Arguments: ---
	114	*
	115	* Returns: ---
	116	*
	117	* Use: Frees all sources.
	118	*/
	119
	120	void source_killall(void)
	121	{
	122	source *s = sources;
	123	while (s) {
	124	source *ss = s;
	125	s = s->next;
57ceb980	126	ss->ops->shutdown(ss);
07d71f34	127	}
	128	sources = 0;
	129	}
	130
	131	/----- That's all, folks -------------------------------------------------/