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/* $OpenBSD$ */
/*
* 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 <zebra.h>
#include "ldpd.h"
#include "ldpe.h"
#include "log.h"
struct accept_ev {
LIST_ENTRY(accept_ev) entry;
struct thread *ev;
int (*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 int accept_cb(struct thread *);
static int accept_timeout(struct thread *);
void
accept_init(void)
{
LIST_INIT(&accept_queue.queue);
}
int
accept_add(int fd, int (*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);
av->ev = NULL;
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_READ_OFF(av->ev);
LIST_REMOVE(av, entry);
free(av);
return;
}
}
void
accept_pause(void)
{
log_debug(__func__);
accept_unarm();
accept_queue.evt = NULL;
thread_add_timer(master, accept_timeout, NULL, 1, &accept_queue.evt);
}
void
accept_unpause(void)
{
if (accept_queue.evt != NULL) {
log_debug(__func__);
THREAD_TIMER_OFF(accept_queue.evt);
accept_arm();
}
}
static void
accept_arm(void)
{
struct accept_ev *av;
LIST_FOREACH(av, &accept_queue.queue, entry) {
av->ev = NULL;
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_READ_OFF(av->ev);
}
static int
accept_cb(struct thread *thread)
{
struct accept_ev *av = THREAD_ARG(thread);
av->ev = NULL;
thread_add_read(master, accept_cb, av, av->fd, &av->ev);
av->accept_cb(thread);
return (0);
}
static int
accept_timeout(struct thread *thread)
{
accept_queue.evt = NULL;
log_debug(__func__);
accept_arm();
return (0);
}
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