[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 event *ev;
	void (*accept_cb)(struct event *);
	void			*arg;
	int			 fd;
};

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

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

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

int accept_add(int fd, void (*cb)(struct event *), 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);

	event_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);
			EVENT_OFF(av->ev);
			LIST_REMOVE(av, entry);
			free(av);
			return;
		}
}

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

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

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

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

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

	log_debug(__func__);
	accept_arm();
}
Commit	Line	Data
acddc0ed	1	// SPDX-License-Identifier: ISC
8429abe0 RW	2	/* $OpenBSD$ */
	3
	4	/*
	5	* Copyright (c) 2012 Claudio Jeker <claudio@openbsd.org>
8429abe0 RW	6	*/
8429abe0 RW	7
eac6e3f0	8	#include <zebra.h>
8429abe0 RW	9
	10	#include "ldpd.h"
	11	#include "ldpe.h"
	12	#include "log.h"
	13
	14	struct accept_ev {
	15	LIST_ENTRY(accept_ev) entry;
e6685141 DS	16	struct event *ev;
e6685141 DS	17	void (accept_cb)(struct event );
8429abe0 RW	18	void *arg;
	19	int fd;
	20	};
	21
	22	struct {
eac6e3f0	23	LIST_HEAD(, accept_ev) queue;
e6685141	24	struct event *evt;
8429abe0 RW	25	} accept_queue;
	26
	27	static void accept_arm(void);
	28	static void accept_unarm(void);
e6685141 DS	29	static void accept_cb(struct event *);
e6685141 DS	30	static void accept_timeout(struct event *);
8429abe0 RW	31
	32	void
	33	accept_init(void)
	34	{
	35	LIST_INIT(&accept_queue.queue);
8429abe0 RW	36	}
8429abe0 RW	37
e6685141	38	int accept_add(int fd, void (cb)(struct event ), void *arg)
8429abe0 RW	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
907a2395	49	event_add_read(master, accept_cb, av, av->fd, &av->ev);
8429abe0 RW	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);
e16d030c	64	EVENT_OFF(av->ev);
8429abe0 RW	65	LIST_REMOVE(av, entry);
	66	free(av);
	67	return;
	68	}
	69	}
	70
	71	void
	72	accept_pause(void)
	73	{
8429abe0 RW	74	log_debug(__func__);
8429abe0 RW	75	accept_unarm();
907a2395	76	event_add_timer(master, accept_timeout, NULL, 1, &accept_queue.evt);
8429abe0 RW	77	}
	78
	79	void
	80	accept_unpause(void)
	81	{
eac6e3f0	82	if (accept_queue.evt != NULL) {
8429abe0	83	log_debug(__func__);
e16d030c	84	EVENT_OFF(accept_queue.evt);
8429abe0 RW	85	accept_arm();
	86	}
	87	}
	88
	89	static void
	90	accept_arm(void)
	91	{
	92	struct accept_ev *av;
66e78ae6	93	LIST_FOREACH(av, &accept_queue.queue, entry) {
907a2395	94	event_add_read(master, accept_cb, av, av->fd, &av->ev);
66e78ae6	95	}
8429abe0 RW	96	}
	97
	98	static void
	99	accept_unarm(void)
	100	{
	101	struct accept_ev *av;
	102	LIST_FOREACH(av, &accept_queue.queue, entry)
e16d030c	103	EVENT_OFF(av->ev);
8429abe0 RW	104	}
8429abe0 RW	105
e6685141	106	static void accept_cb(struct event *thread)
8429abe0	107	{
e16d030c	108	struct accept_ev *av = EVENT_ARG(thread);
907a2395	109	event_add_read(master, accept_cb, av, av->fd, &av->ev);
eac6e3f0	110	av->accept_cb(thread);
8429abe0 RW	111	}
8429abe0 RW	112
e6685141	113	static void accept_timeout(struct event *thread)
8429abe0	114	{
eac6e3f0 RW	115	accept_queue.evt = NULL;
eac6e3f0 RW	116
8429abe0 RW	117	log_debug(__func__);
	118	accept_arm();
	119	}