/*
    subnet.h -- header for subnet.c
    Copyright (C) 2000,2001 Guus Sliepen <guus@sliepen.eu.org>,
                  2000,2001 Ivo Timmermans <ivo@o2w.nl>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id: subnet.h,v 1.1.2.20 2002/09/09 21:25:16 guus Exp $
*/

#ifndef __TINC_SUBNET_H__
#define __TINC_SUBNET_H__

#include "net.h"

enum {
	SUBNET_MAC = 0,
	SUBNET_IPV4,
	SUBNET_IPV6,
	SUBNET_TYPES				/* Guardian */
};

typedef struct subnet_mac_t {
	mac_t address;
	time_t lastseen;
} subnet_mac_t;

typedef struct subnet_ipv4_t {
	ipv4_t address;
	int prefixlength;
} subnet_ipv4_t;

typedef struct subnet_ipv6_t {
	ipv6_t address;
	int prefixlength;
} subnet_ipv6_t;

#include "node.h"

typedef struct subnet_t {
	struct node_t *owner;		/* the owner of this subnet */
	struct node_t *uplink;		/* the uplink which we should send packets to for this subnet */

	int type;					/* subnet type (IPv4? IPv6? MAC? something even weirder?) */

	/* And now for the actual subnet: */

	union net {
		subnet_mac_t mac;
		subnet_ipv4_t ipv4;
		subnet_ipv6_t ipv6;
	} net;
} subnet_t;

extern subnet_t *new_subnet(void);
extern void free_subnet(subnet_t *);
extern void init_subnets(void);
extern void exit_subnets(void);
extern avl_tree_t *new_subnet_tree(void);
extern void free_subnet_tree(avl_tree_t *);
extern void subnet_add(struct node_t *, subnet_t *);
extern void subnet_del(struct node_t *, subnet_t *);
extern char *net2str(subnet_t *);
extern subnet_t *str2net(char *);
extern subnet_t *lookup_subnet(struct node_t *, subnet_t *);
extern subnet_t *lookup_subnet_mac(mac_t *);
extern subnet_t *lookup_subnet_ipv4(ipv4_t *);
extern subnet_t *lookup_subnet_ipv6(ipv6_t *);
extern void dump_subnets(void);

#endif							/* __TINC_SUBNET_H__ */