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/*
* This is an implementation of rfc2370.
* Copyright (C) 2001 KDD R&D Laboratories, Inc.
* http://www.kddlabs.co.jp/
*
* This file is part of GNU Zebra.
*
* GNU Zebra 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, or (at your option) any
* later version.
*
* GNU Zebra 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; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _ZEBRA_OSPF_OPAQUE_H
#define _ZEBRA_OSPF_OPAQUE_H
#include "vty.h"
#include <lib/json.h>
#define IS_OPAQUE_LSA(type) \
((type) == OSPF_OPAQUE_LINK_LSA || (type) == OSPF_OPAQUE_AREA_LSA \
|| (type) == OSPF_OPAQUE_AS_LSA)
/*
* Opaque LSA's link state ID is redefined as follows.
*
* 24 16 8 0
* +--------+--------+--------+--------+
* |tttttttt|........|........|........|
* +--------+--------+--------+--------+
* |<-Type->|<------- Opaque ID ------>|
*/
#define LSID_OPAQUE_TYPE_MASK 0xff000000 /* 8 bits */
#define LSID_OPAQUE_ID_MASK 0x00ffffff /* 24 bits */
#define GET_OPAQUE_TYPE(lsid) (((uint32_t)(lsid)&LSID_OPAQUE_TYPE_MASK) >> 24)
#define GET_OPAQUE_ID(lsid) ((uint32_t)(lsid)&LSID_OPAQUE_ID_MASK)
#define SET_OPAQUE_LSID(type, id) \
((((unsigned)(type) << 24) & LSID_OPAQUE_TYPE_MASK) \
| ((id)&LSID_OPAQUE_ID_MASK))
/*
* Opaque LSA types will be assigned by IANA.
* <http://www.iana.org/assignments/ospf-opaque-types>
*/
#define OPAQUE_TYPE_TRAFFIC_ENGINEERING_LSA 1
#define OPAQUE_TYPE_SYCAMORE_OPTICAL_TOPOLOGY_DESC 2
#define OPAQUE_TYPE_GRACE_LSA 3
#define OPAQUE_TYPE_L1VPN_LSA 5
#define OPAQUE_TYPE_ROUTER_INFORMATION_LSA 4
#define OPAQUE_TYPE_INTER_AS_LSA 6
#define OPAQUE_TYPE_EXTENDED_PREFIX_LSA 7
#define OPAQUE_TYPE_EXTENDED_LINK_LSA 8
#define OPAQUE_TYPE_MAX 8
/* Following types are proposed in internet-draft documents. */
#define OPAQUE_TYPE_8021_QOSPF 129
#define OPAQUE_TYPE_SECONDARY_NEIGHBOR_DISCOVERY 224
#define OPAQUE_TYPE_FLOODGATE 225
/* Ugly hack to make use of an unallocated value for wildcard matching! */
#define OPAQUE_TYPE_WILDCARD 0
#define OPAQUE_TYPE_RANGE_UNASSIGNED(type) \
(OPAQUE_TYPE_MAX <= (type) && (type) <= 127)
#define OPAQUE_TYPE_RANGE_RESERVED(type) (127 < (type) && (type) <= 255)
#define OSPF_OPAQUE_LSA_MIN_SIZE 0 /* RFC5250 imposes no minimum */
#define VALID_OPAQUE_INFO_LEN(lsahdr) \
((ntohs((lsahdr)->length) >= sizeof(struct lsa_header)) \
&& ((ntohs((lsahdr)->length) < OSPF_MAX_LSA_SIZE)) \
&& ((ntohs((lsahdr)->length) % sizeof(uint32_t)) == 0))
/*
* Following section defines generic TLV (type, length, value) macros,
* used for various LSA opaque usage e.g. Traffic Engineering.
*/
struct tlv_header {
uint16_t type; /* Type of Value */
uint16_t length; /* Length of Value portion only, in bytes */
};
#define TLV_HDR_SIZE (sizeof(struct tlv_header))
#define TLV_BODY_SIZE(tlvh) (ROUNDUP(ntohs((tlvh)->length), sizeof(uint32_t)))
#define TLV_SIZE(tlvh) (uint32_t)(TLV_HDR_SIZE + TLV_BODY_SIZE(tlvh))
#define TLV_HDR_TOP(lsah) \
(struct tlv_header *)((char *)(lsah) + OSPF_LSA_HEADER_SIZE)
#define TLV_HDR_NEXT(tlvh) \
(struct tlv_header *)((char *)(tlvh) + TLV_SIZE(tlvh))
#define TLV_HDR_SUBTLV(tlvh) \
(struct tlv_header *)((char *)(tlvh) + TLV_HDR_SIZE)
#define TLV_DATA(tlvh) (void *)((char *)(tlvh) + TLV_HDR_SIZE)
#define TLV_TYPE(tlvh) tlvh.header.type
#define TLV_LEN(tlvh) tlvh.header.length
#define TLV_HDR(tlvh) tlvh.header
/* Following declaration concerns the Opaque LSA management */
enum lsa_opcode { REORIGINATE_THIS_LSA, REFRESH_THIS_LSA, FLUSH_THIS_LSA };
/* Prototypes. */
extern void ospf_opaque_init(void);
extern void ospf_opaque_term(void);
extern void ospf_opaque_finish(void);
extern int ospf_opaque_type9_lsa_init(struct ospf_interface *oi);
extern void ospf_opaque_type9_lsa_term(struct ospf_interface *oi);
extern int ospf_opaque_type10_lsa_init(struct ospf_area *area);
extern void ospf_opaque_type10_lsa_term(struct ospf_area *area);
extern int ospf_opaque_type11_lsa_init(struct ospf *ospf);
extern void ospf_opaque_type11_lsa_term(struct ospf *ospf);
extern int ospf_register_opaque_functab(
uint8_t lsa_type, uint8_t opaque_type,
int (*new_if_hook)(struct interface *ifp),
int (*del_if_hook)(struct interface *ifp),
void (*ism_change_hook)(struct ospf_interface *oi, int old_status),
void (*nsm_change_hook)(struct ospf_neighbor *nbr, int old_status),
void (*config_write_router)(struct vty *vty),
void (*config_write_if)(struct vty *vty, struct interface *ifp),
void (*config_write_debug)(struct vty *vty),
void (*show_opaque_info)(struct vty *vty, struct json_object *json,
struct ospf_lsa *lsa),
int (*lsa_originator)(void *arg),
struct ospf_lsa *(*lsa_refresher)(struct ospf_lsa *lsa),
int (*new_lsa_hook)(struct ospf_lsa *lsa),
int (*del_lsa_hook)(struct ospf_lsa *lsa));
extern void ospf_delete_opaque_functab(uint8_t lsa_type, uint8_t opaque_type);
extern int ospf_opaque_new_if(struct interface *ifp);
extern int ospf_opaque_del_if(struct interface *ifp);
extern void ospf_opaque_ism_change(struct ospf_interface *oi, int old_status);
extern void ospf_opaque_nsm_change(struct ospf_neighbor *nbr, int old_status);
extern void ospf_opaque_config_write_router(struct vty *vty, struct ospf *ospf);
extern void ospf_opaque_config_write_if(struct vty *vty, struct interface *ifp);
extern void ospf_opaque_config_write_debug(struct vty *vty);
extern void show_opaque_info_detail(struct vty *vty, struct ospf_lsa *lsa,
json_object *json);
extern void ospf_opaque_lsa_dump(struct stream *s, uint16_t length);
extern void ospf_opaque_lsa_originate_schedule(struct ospf_interface *oi,
int *init_delay);
extern struct ospf_lsa *ospf_opaque_lsa_install(struct ospf_lsa *lsa,
int rt_recalc);
extern struct ospf_lsa *ospf_opaque_lsa_refresh(struct ospf_lsa *lsa);
extern void ospf_opaque_lsa_reoriginate_schedule(void *lsa_type_dependent,
uint8_t lsa_type,
uint8_t opaque_type);
extern void ospf_opaque_lsa_refresh_schedule(struct ospf_lsa *lsa);
extern void ospf_opaque_lsa_flush_schedule(struct ospf_lsa *lsa);
extern void ospf_opaque_self_originated_lsa_received(struct ospf_neighbor *nbr,
struct ospf_lsa *lsa);
extern struct ospf *oi_to_top(struct ospf_interface *oi);
extern int ospf_opaque_is_owned(struct ospf_lsa *lsa);
#endif /* _ZEBRA_OSPF_OPAQUE_H */
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