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