9f20bfa6c4
The port could be improved by adding support for pselect(2). Other than that, this port has a few MINIX-specific changes: - we undefine IN_IFF_ flags to stop dhcpcd from thinking that we have operating system support for link-local IPv4 address management; - we work around one crash bug that seems triggered by using dhcpcd on some but not all interfaces; - we add "noalias" to the default dhcpcd.conf(5) configuration file. Change-Id: I8a81c2c2af353c5ce08335673b1ab2d4b39178da
194 lines
7.0 KiB
C
194 lines
7.0 KiB
C
/* $NetBSD: eloop.h,v 1.9 2015/05/16 23:31:32 roy Exp $ */
|
|
|
|
/*
|
|
* dhcpcd - DHCP client daemon
|
|
* Copyright (c) 2006-2015 Roy Marples <roy@marples.name>
|
|
* All rights reserved
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef ELOOP_H
|
|
#define ELOOP_H
|
|
|
|
#include <time.h>
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#else
|
|
/* Attempt to autodetect kqueue or epoll.
|
|
* If we can't, the system has to support pselect, which is a POSIX call. */
|
|
#if (defined(__unix__) || defined(unix)) && !defined(USG)
|
|
#include <sys/param.h>
|
|
#endif
|
|
#if defined(BSD)
|
|
/* Assume BSD has a working sys/queue.h and kqueue(2) interface */
|
|
#define HAVE_SYS_QUEUE_H
|
|
#define HAVE_KQUEUE
|
|
#elif defined(__linux__)
|
|
/* Assume Linux has a working epoll(3) interface */
|
|
#define HAVE_EPOLL
|
|
#endif
|
|
#endif
|
|
|
|
/* Our structures require TAILQ macros, which really every libc should
|
|
* ship as they are useful beyond belief.
|
|
* Sadly some libc's don't have sys/queue.h and some that do don't have
|
|
* the TAILQ_FOREACH macro. For those that don't, the application using
|
|
* this implementation will need to ship a working queue.h somewhere.
|
|
* If we don't have sys/queue.h found in config.h, then
|
|
* allow QUEUE_H to override loading queue.h in the current directory. */
|
|
#ifndef TAILQ_FOREACH
|
|
#ifdef HAVE_SYS_QUEUE_H
|
|
#include <sys/queue.h>
|
|
#elif defined(QUEUE_H)
|
|
#define __QUEUE_HEADER(x) #x
|
|
#define _QUEUE_HEADER(x) __QUEUE_HEADER(x)
|
|
#include _QUEUE_HEADER(QUEUE_H)
|
|
#else
|
|
#include "queue.h"
|
|
#endif
|
|
#endif
|
|
|
|
/* Some systems don't define timespec macros */
|
|
#ifndef timespecclear
|
|
#define timespecclear(tsp) (tsp)->tv_sec = (time_t)((tsp)->tv_nsec = 0L)
|
|
#define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec)
|
|
#define timespeccmp(tsp, usp, cmp) \
|
|
(((tsp)->tv_sec == (usp)->tv_sec) ? \
|
|
((tsp)->tv_nsec cmp (usp)->tv_nsec) : \
|
|
((tsp)->tv_sec cmp (usp)->tv_sec))
|
|
#define timespecadd(tsp, usp, vsp) \
|
|
do { \
|
|
(vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \
|
|
(vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \
|
|
if ((vsp)->tv_nsec >= 1000000000L) { \
|
|
(vsp)->tv_sec++; \
|
|
(vsp)->tv_nsec -= 1000000000L; \
|
|
} \
|
|
} while (/* CONSTCOND */ 0)
|
|
#define timespecsub(tsp, usp, vsp) \
|
|
do { \
|
|
(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
|
|
(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
|
|
if ((vsp)->tv_nsec < 0) { \
|
|
(vsp)->tv_sec--; \
|
|
(vsp)->tv_nsec += 1000000000L; \
|
|
} \
|
|
} while (/* CONSTCOND */ 0)
|
|
#endif
|
|
|
|
/* eloop queues are really only for deleting timeouts registered
|
|
* for a function or object.
|
|
* The idea being that one interface as different timeouts for
|
|
* say DHCP and DHCPv6. */
|
|
#ifndef ELOOP_QUEUE
|
|
#define ELOOP_QUEUE 1
|
|
#endif
|
|
|
|
struct eloop_event {
|
|
TAILQ_ENTRY(eloop_event) next;
|
|
int fd;
|
|
void (*read_cb)(void *);
|
|
void *read_cb_arg;
|
|
void (*write_cb)(void *);
|
|
void *write_cb_arg;
|
|
#if !defined(HAVE_KQUEUE) && !defined(HAVE_EPOLL)
|
|
struct pollfd *pollfd;
|
|
#endif
|
|
};
|
|
|
|
struct eloop_timeout {
|
|
TAILQ_ENTRY(eloop_timeout) next;
|
|
struct timespec when;
|
|
void (*callback)(void *);
|
|
void *arg;
|
|
int queue;
|
|
};
|
|
|
|
struct eloop {
|
|
size_t events_len;
|
|
TAILQ_HEAD (event_head, eloop_event) events;
|
|
struct event_head free_events;
|
|
|
|
TAILQ_HEAD (timeout_head, eloop_timeout) timeouts;
|
|
struct timeout_head free_timeouts;
|
|
|
|
void (*timeout0)(void *);
|
|
void *timeout0_arg;
|
|
const int *signals;
|
|
size_t signals_len;
|
|
void (*signal_cb)(int, void *);
|
|
void *signal_cb_ctx;
|
|
|
|
#if defined(HAVE_KQUEUE) || defined(HAVE_EPOLL)
|
|
int poll_fd;
|
|
#else
|
|
struct pollfd *fds;
|
|
size_t fds_len;
|
|
#endif
|
|
|
|
int exitnow;
|
|
int exitcode;
|
|
};
|
|
|
|
int eloop_event_add(struct eloop *, int,
|
|
void (*)(void *), void *,
|
|
void (*)(void *), void *);
|
|
#define eloop_event_delete(eloop, fd) \
|
|
eloop_event_delete_write((eloop), (fd), 0)
|
|
#define eloop_event_remove_writecb(eloop, fd) \
|
|
eloop_event_delete_write((eloop), (fd), 1)
|
|
void eloop_event_delete_write(struct eloop *, int, int);
|
|
|
|
#define eloop_timeout_add_tv(eloop, tv, cb, ctx) \
|
|
eloop_q_timeout_add_tv((eloop), ELOOP_QUEUE, (tv), (cb), (ctx))
|
|
#define eloop_timeout_add_sec(eloop, tv, cb, ctx) \
|
|
eloop_q_timeout_add_sec((eloop), ELOOP_QUEUE, (tv), (cb), (ctx))
|
|
#define eloop_timeout_add_msec(eloop, ms, cb, ctx) \
|
|
eloop_q_timeout_add_msec((eloop), ELOOP_QUEUE, (ms), (cb), (ctx))
|
|
#define eloop_timeout_delete(eloop, cb, ctx) \
|
|
eloop_q_timeout_delete((eloop), ELOOP_QUEUE, (cb), (ctx))
|
|
int eloop_q_timeout_add_tv(struct eloop *, int,
|
|
const struct timespec *, void (*)(void *), void *);
|
|
int eloop_q_timeout_add_sec(struct eloop *, int,
|
|
time_t, void (*)(void *), void *);
|
|
int eloop_q_timeout_add_msec(struct eloop *, int,
|
|
long, void (*)(void *), void *);
|
|
void eloop_q_timeout_delete(struct eloop *, int, void (*)(void *), void *);
|
|
|
|
int eloop_signal_set_cb(struct eloop *, const int *, size_t,
|
|
void (*)(int, void *), void *);
|
|
int eloop_signal_mask(struct eloop *, sigset_t *oldset);
|
|
|
|
struct eloop * eloop_new(void);
|
|
#if defined(HAVE_KQUEUE) || defined(HAVE_EPOLL)
|
|
int eloop_requeue(struct eloop *);
|
|
#else
|
|
#define eloop_requeue(eloop) (0)
|
|
#endif
|
|
void eloop_free(struct eloop *);
|
|
void eloop_exit(struct eloop *, int);
|
|
int eloop_start(struct eloop *, sigset_t *);
|
|
|
|
#endif
|