/* 
 * dhcpcd - DHCP client daemon
 * Copyright (c) 2006-2011 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 DHCPCD_H
#define DHCPCD_H

#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>

#include <limits.h>

#include "control.h"
#include "dhcp.h"
#include "if-options.h"

#define HWADDR_LEN 20
#define IF_SSIDSIZE 33
#define PROFILE_LEN 64

enum DHS {
	DHS_INIT,
	DHS_DISCOVER,
	DHS_REQUEST,
	DHS_BOUND,
	DHS_RENEW,
	DHS_REBIND,
	DHS_REBOOT,
	DHS_INFORM,
	DHS_RENEW_REQUESTED,
	DHS_INIT_IPV4LL,
	DHS_PROBE
};

#define LINK_UP 	1
#define LINK_UNKNOWN	0
#define LINK_DOWN 	-1

struct if_state {
	enum DHS state;
	char profile[PROFILE_LEN];
	struct if_options *options;
	struct dhcp_message *sent;
	struct dhcp_message *offer;
	struct dhcp_message *new;
	struct dhcp_message *old;
	struct dhcp_lease lease;
	const char *reason;
	time_t interval;
	time_t nakoff;
	uint32_t xid;
	int socket;
	int probes;
	int claims;
	int conflicts;
	time_t defend;
	struct in_addr fail;
	size_t arping_index;
};

struct ra_opt {
	uint8_t type;
	struct timeval expire;
	char *option;
	struct ra_opt *next;
};

struct ra {
	struct in6_addr from;
	char sfrom[INET6_ADDRSTRLEN];
	unsigned char *data;
	ssize_t data_len;
	struct timeval received;
	uint32_t lifetime;
	struct in6_addr prefix;
	int prefix_len;
	uint32_t prefix_vltime;
	uint32_t prefix_pltime;
	char sprefix[INET6_ADDRSTRLEN];
	struct ra_opt *options;
	int expired;
	struct ra *next;
};

struct interface {
	char name[IF_NAMESIZE];
	struct if_state *state;

	int flags;
	sa_family_t family;
	unsigned char hwaddr[HWADDR_LEN];
	size_t hwlen;
	int metric;
	int carrier;
	int wireless;
	char ssid[IF_SSIDSIZE];

	int raw_fd;
	int udp_fd;
	int arp_fd;
	size_t buffer_size, buffer_len, buffer_pos;
	unsigned char *buffer;

	struct in_addr addr;
	struct in_addr net;
	struct in_addr dst;

	char leasefile[PATH_MAX];
	time_t start_uptime;

	unsigned char *clientid;

	unsigned char *rs;
	size_t rslen;
	int rsprobes;
	struct ra *ras;

	struct interface *next;
};

extern int pidfd;
extern unsigned long long options;
extern int ifac;
extern char **ifav;
extern int ifdc;
extern char **ifdv;
extern struct interface *ifaces;

struct interface *find_interface(const char *);
int handle_args(struct fd_list *, int, char **);
void handle_carrier(int, int, const char *);
void handle_interface(int, const char *);
void handle_hwaddr(const char *, unsigned char *, size_t);
void handle_ifa(int, const char *,
    struct in_addr *, struct in_addr *, struct in_addr *);
void handle_exit_timeout(void *);
void start_interface(void *);
void start_discover(void *);
void start_request(void *);
void start_renew(void *);
void start_rebind(void *);
void start_reboot(struct interface *);
void start_expire(void *);
void send_decline(struct interface *);
void open_sockets(struct interface *);
void close_sockets(struct interface *);
void drop_dhcp(struct interface *, const char *);
void drop_interface(struct interface *, const char *);
int select_profile(struct interface *, const char *);

#endif
