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/* $OpenBSD: accept.c,v 1.3 2013/10/31 16:56:22 deraadt Exp $ */
/*
* Copyright (c) 2012 Claudio Jeker <claudio@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/queue.h>
#include <sys/time.h>
#include <event.h>
#include <stdlib.h>
#include "ldpd.h"
#include "ldpe.h"
#include "log.h"
struct accept_ev {
LIST_ENTRY(accept_ev) entry;
struct event ev;
void (*accept_cb)(int, short, void *);
void *arg;
int fd;
};
struct {
LIST_HEAD(, accept_ev) queue;
struct event evt;
} accept_queue;
void accept_arm(void);
void accept_unarm(void);
void accept_cb(int, short, void *);
void accept_timeout(int, short, void *);
void
accept_init(void)
{
LIST_INIT(&accept_queue.queue);
evtimer_set(&accept_queue.evt, accept_timeout, NULL);
}
int
accept_add(int fd, void (*cb)(int, short, void *), 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_set(&av->ev, av->fd, EV_READ, accept_cb, av);
event_add(&av->ev, NULL);
log_debug("accept_add: accepting on fd %d", 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("accept_del: %d removed from queue", fd);
event_del(&av->ev);
LIST_REMOVE(av, entry);
free(av);
return;
}
}
void
accept_pause(void)
{
struct timeval evtpause = { 1, 0 };
log_debug("accept_pause");
accept_unarm();
evtimer_add(&accept_queue.evt, &evtpause);
}
void
accept_unpause(void)
{
if (evtimer_pending(&accept_queue.evt, NULL)) {
log_debug("accept_unpause");
evtimer_del(&accept_queue.evt);
accept_arm();
}
}
void
accept_arm(void)
{
struct accept_ev *av;
LIST_FOREACH(av, &accept_queue.queue, entry)
event_add(&av->ev, NULL);
}
void
accept_unarm(void)
{
struct accept_ev *av;
LIST_FOREACH(av, &accept_queue.queue, entry)
event_del(&av->ev);
}
void
accept_cb(int fd, short event, void *arg)
{
struct accept_ev *av = arg;
event_add(&av->ev, NULL);
av->accept_cb(fd, event, av->arg);
}
void
accept_timeout(int fd, short event, void *bula)
{
log_debug("accept_timeout");
accept_arm();
}
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