ospf_te.h
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上传日期:2009-11-15
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- /*
- * This is an implementation of draft-katz-yeung-ospf-traffic-06.txt
- * 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 GNU Zebra; see the file COPYING. If not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
- #ifndef _ZEBRA_OSPF_MPLS_TE_H
- #define _ZEBRA_OSPF_MPLS_TE_H
- /*
- * Opaque LSA's link state ID for Traffic Engineering is
- * structured as follows.
- *
- * 24 16 8 0
- * +--------+--------+--------+--------+
- * | 1 | MBZ |........|........|
- * +--------+--------+--------+--------+
- * |<-Type->|<Resv'd>|<-- Instance --->|
- *
- *
- * Type: IANA has assigned '1' for Traffic Engineering.
- * MBZ: Reserved, must be set to zero.
- * Instance: User may select an arbitrary 16-bit value.
- *
- */
- #define LEGAL_TE_INSTANCE_RANGE(i) (0 <= (i) && (i) <= 0xffff)
- /*
- * 24 16 8 0
- * +--------+--------+--------+--------+ ---
- * | LS age |Options | 10 | A
- * +--------+--------+--------+--------+ |
- * | 1 | 0 | Instance | |
- * +--------+--------+--------+--------+ |
- * | Advertising router | | Standard (Opaque) LSA header;
- * +--------+--------+--------+--------+ | Only type-10 is used.
- * | LS sequence number | |
- * +--------+--------+--------+--------+ |
- * | LS checksum | Length | V
- * +--------+--------+--------+--------+ ---
- * | Type | Length | A
- * +--------+--------+--------+--------+ | TLV part for TE; Values might be
- * | Values ... | V structured as a set of sub-TLVs.
- * +--------+--------+--------+--------+ ---
- */
- /*
- * Following section defines TLV (tag, length, value) structures,
- * used for Traffic Engineering.
- */
- struct te_tlv_header
- {
- u_int16_t type; /* TE_TLV_XXX (see below) */
- u_int16_t length; /* Value portion only, in octets */
- };
- #define TLV_HDR_SIZE
- sizeof (struct te_tlv_header)
- #define TLV_BODY_SIZE(tlvh)
- ROUNDUP (ntohs ((tlvh)->length), sizeof (u_int32_t))
- #define TLV_SIZE(tlvh)
- (TLV_HDR_SIZE + TLV_BODY_SIZE(tlvh))
- #define TLV_HDR_TOP(lsah)
- (struct te_tlv_header *)((char *)(lsah) + OSPF_LSA_HEADER_SIZE)
- #define TLV_HDR_NEXT(tlvh)
- (struct te_tlv_header *)((char *)(tlvh) + TLV_SIZE(tlvh))
- /*
- * Following section defines TLV body parts.
- */
- /* Router Address TLV *//* Mandatory */
- #define TE_TLV_ROUTER_ADDR 1
- struct te_tlv_router_addr
- {
- struct te_tlv_header header; /* Value length is 4 octets. */
- struct in_addr value;
- };
- /* Link TLV */
- #define TE_TLV_LINK 2
- struct te_tlv_link
- {
- struct te_tlv_header header;
- /* A set of link-sub-TLVs will follow. */
- };
- /* Link Type Sub-TLV *//* Mandatory */
- #define TE_LINK_SUBTLV_LINK_TYPE 1
- struct te_link_subtlv_link_type
- {
- struct te_tlv_header header; /* Value length is 1 octet. */
- struct {
- #define LINK_TYPE_SUBTLV_VALUE_PTP 1
- #define LINK_TYPE_SUBTLV_VALUE_MA 2
- u_char value;
- u_char padding[3];
- } link_type;
- };
- /* Link Sub-TLV: Link ID *//* Mandatory */
- #define TE_LINK_SUBTLV_LINK_ID 2
- struct te_link_subtlv_link_id
- {
- struct te_tlv_header header; /* Value length is 4 octets. */
- struct in_addr value; /* Same as router-lsa's link-id. */
- };
- /* Link Sub-TLV: Local Interface IP Address *//* Optional */
- #define TE_LINK_SUBTLV_LCLIF_IPADDR 3
- struct te_link_subtlv_lclif_ipaddr
- {
- struct te_tlv_header header; /* Value length is 4 x N octets. */
- struct in_addr value[1]; /* Local IP address(es). */
- };
- /* Link Sub-TLV: Remote Interface IP Address *//* Optional */
- #define TE_LINK_SUBTLV_RMTIF_IPADDR 4
- struct te_link_subtlv_rmtif_ipaddr
- {
- struct te_tlv_header header; /* Value length is 4 x N octets. */
- struct in_addr value[1]; /* Neighbor's IP address(es). */
- };
- /* Link Sub-TLV: Traffic Engineering Metric *//* Optional */
- #define TE_LINK_SUBTLV_TE_METRIC 5
- struct te_link_subtlv_te_metric
- {
- struct te_tlv_header header; /* Value length is 4 octets. */
- u_int32_t value; /* Link metric for TE purpose. */
- };
- /* Link Sub-TLV: Maximum Bandwidth *//* Optional */
- #define TE_LINK_SUBTLV_MAX_BW 6
- struct te_link_subtlv_max_bw
- {
- struct te_tlv_header header; /* Value length is 4 octets. */
- float value; /* bytes/sec */
- };
- /* Link Sub-TLV: Maximum Reservable Bandwidth *//* Optional */
- #define TE_LINK_SUBTLV_MAX_RSV_BW 7
- struct te_link_subtlv_max_rsv_bw
- {
- struct te_tlv_header header; /* Value length is 4 octets. */
- float value; /* bytes/sec */
- };
- /* Link Sub-TLV: Unreserved Bandwidth *//* Optional */
- #define TE_LINK_SUBTLV_UNRSV_BW 8
- struct te_link_subtlv_unrsv_bw
- {
- struct te_tlv_header header; /* Value length is 32 octets. */
- float value[8]; /* One for each priority level. */
- };
- /* Link Sub-TLV: Resource Class/Color *//* Optional */
- #define TE_LINK_SUBTLV_RSC_CLSCLR 9
- struct te_link_subtlv_rsc_clsclr
- {
- struct te_tlv_header header; /* Value length is 4 octets. */
- u_int32_t value; /* Admin. group membership. */
- };
- /* Here are "non-official" architechtual constants. */
- #define MPLS_TE_MINIMUM_BANDWIDTH 1.0 /* Reasonable? *//* XXX */
- /* Prototypes. */
- extern int ospf_mpls_te_init (void);
- extern void ospf_mpls_te_term (void);
- #endif /* _ZEBRA_OSPF_MPLS_TE_H */