/*
 * firewall3 - 3rd OpenWrt UCI firewall implementation
 *
 *   Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
 *
 * Permission to use, copy, modify, and/or 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.
 */

#ifndef __FW3_UTILS_H
#define __FW3_UTILS_H

#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/file.h>

#include <libubox/list.h>
#include <uci.h>


#define FW3_STATEFILE	"/var/run/fw3.lock"

void warn_elem(struct uci_element *e, const char *format, ...);
void warn(const char *format, ...);
void error(const char *format, ...);
void info(const char *format, ...);

#define fw3_foreach(p, h)                                                  \
	for (p = list_empty(h) ? NULL : list_first_entry(h, typeof(*p), list); \
         list_empty(h) ? (p == NULL) : (&p->list != (h));                  \
	     p = list_empty(h) ? list_first_entry(h, typeof(*p), list)         \
                           : list_entry(p->list.next, typeof(*p), list))

static inline void
fw3_free_list(struct list_head *list)
{
	struct list_head *cur, *tmp;

	list_for_each_safe(cur, tmp, list)
	{
		list_del(cur);
		free(cur);
	}
}

#define fw3_is_family(p, f)                                                \
	(!p || p->family == FW3_FAMILY_ANY || p->family == f)

const char * fw3_find_command(const char *cmd);

bool fw3_stdout_pipe(void);
bool __fw3_command_pipe(bool silent, const char *command, ...);
#define fw3_command_pipe(...) __fw3_command_pipe(__VA_ARGS__, NULL)

void fw3_command_close(void);
void fw3_pr(const char *fmt, ...);

bool fw3_has_table(bool ipv6, const char *table);

bool fw3_check_statefile(bool test_exists);
void fw3_remove_statefile(void);
void fw3_close_statefile(void);

#endif