/*
 * OSPFv3 Not So Stubby Area implementation.
 *
 * Copyright (C) 2021 Kaushik Nath
 * Copyright (C) 2021 Soman K.S
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef OSPF6_NSSA_H
#define OSPF6_NSSA_H

#define OSPF6_OPTION_NP         0x08
#define OSPF6_LS_INFINITY       0xffffff

#define OSPF6_OPT_N             (1 << 3) /* Handling Type-7 LSA Capability */

#define OSPF6_DEBUG_NSSA        0x09
/* Debug option */
extern unsigned char config_debug_ospf6_nssa;

#define OSPF6_DEBUG_NSSA_ON() (config_debug_ospf6_nssa = 1)
#define OSPF6_DEBUG_NSSA_OFF() (config_debug_ospf6_nssa = 0)
#define IS_OSPF6_DEBUG_NSSA config_debug_ospf6_nssa

#define CHECK_LSA_TYPE_1_TO_5_OR_7(type)                                       \
	((type == OSPF6_ROUTER_LSA_MIN_SIZE)                                   \
	 || (type == OSPF6_NETWORK_LSA_MIN_SIZE)                               \
	 || (type == OSPF6_LINK_LSA_MIN_SIZE)                                  \
	 || (type == OSPF6_INTRA_PREFIX_LSA_MIN_SIZE)                          \
	 || (type == OSPF6_AS_NSSA_LSA))

#define OSPF6_LSA_APPROVED      0x08
#define OSPF6_LSA_LOCAL_XLT     0x40

#define OSPF6_ABR_TASK_DELAY    7

int ospf6_area_nssa_no_summary_set(struct ospf6 *ospf6, struct in_addr area_id);
int ospf6_area_nssa_unset(struct ospf6 *ospf6, struct ospf6_area *area);
int ospf6_area_nssa_set(struct ospf6 *ospf6, struct ospf6_area *area);

extern void ospf6_nssa_lsa_flush(struct ospf6 *ospf6, struct prefix_ipv6 *p);
extern struct ospf6_lsa *ospf6_translated_nssa_refresh(struct ospf6_area *oa,
						       struct ospf6_lsa *type7,
						       struct ospf6_lsa *type5);

extern void ospf6_asbr_nssa_redist_task(struct ospf6 *ospf6);

extern void ospf6_schedule_abr_task(struct ospf6 *ospf6);
extern void ospf6_area_nssa_update(struct ospf6_area *area);
void ospf6_asbr_prefix_readvertise(struct ospf6 *ospf6);
extern void ospf6_nssa_lsa_originate(struct ospf6_route *route,
				     struct ospf6_area *area, bool p_bit);
extern void install_element_ospf6_debug_nssa(void);
extern void ospf6_abr_nssa_type_7_defaults(struct ospf6 *osof6);
int ospf6_redistribute_check(struct ospf6 *ospf6, struct ospf6_route *route,
			     int type);
extern void ospf6_abr_check_translate_nssa(struct ospf6_area *area,
					   struct ospf6_lsa *lsa);
extern void ospf6_abr_nssa_check_status(struct ospf6 *ospf6);
extern void config_write_ospf6_debug_nssa(struct vty *vty);
#endif /* OSPF6_NSSA_H */
