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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 */
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