[mirror_frr.git] / ldpd / accept.c

// SPDX-License-Identifier: ISC
/*	$OpenBSD$ */

/*
 * Copyright (c) 2012 Claudio Jeker <claudio@openbsd.org>
 */

#include <zebra.h>

#include "ldpd.h"
#include "ldpe.h"
#include "log.h"

struct accept_ev {
	LIST_ENTRY(accept_ev)	 entry;
	struct thread		*ev;
	void (*accept_cb)(struct thread *);
	void			*arg;
	int			 fd;
};

struct {
	LIST_HEAD(, accept_ev)	 queue;
	struct thread		*evt;
} accept_queue;

static void	accept_arm(void);
static void	accept_unarm(void);
static void accept_cb(struct thread *);
static void accept_timeout(struct thread *);

void
accept_init(void)
{
	LIST_INIT(&accept_queue.queue);
}

int accept_add(int fd, void (*cb)(struct thread *), void *arg)
{
	struct accept_ev	*av;

	if ((av = calloc(1, sizeof(*av))) == NULL)
		return (-1);
	av->fd = fd;
	av->accept_cb = cb;
	av->arg = arg;
	LIST_INSERT_HEAD(&accept_queue.queue, av, entry);

	thread_add_read(master, accept_cb, av, av->fd, &av->ev);

	log_debug("%s: accepting on fd %d", __func__, fd);

	return (0);
}

void
accept_del(int fd)
{
	struct accept_ev	*av;

	LIST_FOREACH(av, &accept_queue.queue, entry)
		if (av->fd == fd) {
			log_debug("%s: %d removed from queue", __func__, fd);
			THREAD_OFF(av->ev);
			LIST_REMOVE(av, entry);
			free(av);
			return;
		}
}

void
accept_pause(void)
{
	log_debug(__func__);
	accept_unarm();
	thread_add_timer(master, accept_timeout, NULL, 1, &accept_queue.evt);
}

void
accept_unpause(void)
{
	if (accept_queue.evt != NULL) {
		log_debug(__func__);
		THREAD_OFF(accept_queue.evt);
		accept_arm();
	}
}

static void
accept_arm(void)
{
	struct accept_ev	*av;
	LIST_FOREACH(av, &accept_queue.queue, entry) {
		thread_add_read(master, accept_cb, av, av->fd, &av->ev);
	}
}

static void
accept_unarm(void)
{
	struct accept_ev	*av;
	LIST_FOREACH(av, &accept_queue.queue, entry)
		THREAD_OFF(av->ev);
}

static void accept_cb(struct thread *thread)
{
	struct accept_ev	*av = THREAD_ARG(thread);
	thread_add_read(master, accept_cb, av, av->fd, &av->ev);
	av->accept_cb(thread);
}

static void accept_timeout(struct thread *thread)
{
	accept_queue.evt = NULL;

	log_debug(__func__);
	accept_arm();
}
Commit	Line	Data
	1	// SPDX-License-Identifier: ISC
	2	/* $OpenBSD$ */
	3
	4	/*
	5	* Copyright (c) 2012 Claudio Jeker <claudio@openbsd.org>
	6	*/
	7
	8	#include <zebra.h>
	9
	10	#include "ldpd.h"
	11	#include "ldpe.h"
	12	#include "log.h"
	13
	14	struct accept_ev {
	15	LIST_ENTRY(accept_ev) entry;
	16	struct thread *ev;
	17	void (accept_cb)(struct thread );
	18	void *arg;
	19	int fd;
	20	};
	21
	22	struct {
	23	LIST_HEAD(, accept_ev) queue;
	24	struct thread *evt;
	25	} accept_queue;
	26
	27	static void accept_arm(void);
	28	static void accept_unarm(void);
	29	static void accept_cb(struct thread *);
	30	static void accept_timeout(struct thread *);
	31
	32	void
	33	accept_init(void)
	34	{
	35	LIST_INIT(&accept_queue.queue);
	36	}
	37
	38	int accept_add(int fd, void (cb)(struct thread ), void *arg)
	39	{
	40	struct accept_ev *av;
	41
	42	if ((av = calloc(1, sizeof(*av))) == NULL)
	43	return (-1);
	44	av->fd = fd;
	45	av->accept_cb = cb;
	46	av->arg = arg;
	47	LIST_INSERT_HEAD(&accept_queue.queue, av, entry);
	48
	49	thread_add_read(master, accept_cb, av, av->fd, &av->ev);
	50
	51	log_debug("%s: accepting on fd %d", __func__, fd);
	52
	53	return (0);
	54	}
	55
	56	void
	57	accept_del(int fd)
	58	{
	59	struct accept_ev *av;
	60
	61	LIST_FOREACH(av, &accept_queue.queue, entry)
	62	if (av->fd == fd) {
	63	log_debug("%s: %d removed from queue", __func__, fd);
	64	THREAD_OFF(av->ev);
	65	LIST_REMOVE(av, entry);
	66	free(av);
	67	return;
	68	}
	69	}
	70
	71	void
	72	accept_pause(void)
	73	{
	74	log_debug(__func__);
	75	accept_unarm();
	76	thread_add_timer(master, accept_timeout, NULL, 1, &accept_queue.evt);
	77	}
	78
	79	void
	80	accept_unpause(void)
	81	{
	82	if (accept_queue.evt != NULL) {
	83	log_debug(__func__);
	84	THREAD_OFF(accept_queue.evt);
	85	accept_arm();
	86	}
	87	}
	88
	89	static void
	90	accept_arm(void)
	91	{
	92	struct accept_ev *av;
	93	LIST_FOREACH(av, &accept_queue.queue, entry) {
	94	thread_add_read(master, accept_cb, av, av->fd, &av->ev);
	95	}
	96	}
	97
	98	static void
	99	accept_unarm(void)
	100	{
	101	struct accept_ev *av;
	102	LIST_FOREACH(av, &accept_queue.queue, entry)
	103	THREAD_OFF(av->ev);
	104	}
	105
	106	static void accept_cb(struct thread *thread)
	107	{
	108	struct accept_ev *av = THREAD_ARG(thread);
	109	thread_add_read(master, accept_cb, av, av->fd, &av->ev);
	110	av->accept_cb(thread);
	111	}
	112
	113	static void accept_timeout(struct thread *thread)
	114	{
	115	accept_queue.evt = NULL;
	116
	117	log_debug(__func__);
	118	accept_arm();
	119	}