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68558b1309
draft-ietf-isis-te-metric-extensions-11 has been published as RFC 7810 Signed-off-by: Olivier Dugeon <olivier.dugeon@orange.com> (cherry picked from commit b2d48d2838ef4813f4c7c7d0ce1d55dc25e3acf1)
332 lines
11 KiB
C
332 lines
11 KiB
C
/*
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* IS-IS Rout(e)ing protocol - isis_te.c
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*
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* This is an implementation of RFC5305, RFC 5307 and RFC 7810
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*
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* Copyright (C) 2014 Orange Labs
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* http://www.orange.com
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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
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* along with GNU Zebra; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef _ZEBRA_ISIS_MPLS_TE_H
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#define _ZEBRA_ISIS_MPLS_TE_H
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/*
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* Traffic Engineering information are transport through LSP:
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* - Extended IS Reachability TLV = 22
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* - Traffic Engineering Router ID TLV = 134
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* - Extended IP Reachability TLV = 135
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* - Inter-AS Reachability Information TLV = 141
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*
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* and support following sub-TLV:
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*
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* Name Value Status
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* _________________________________________________
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* Administartive group (color) 3 RFC5305
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* Link Local/Remote Identifiers 4 RFC5307
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* IPv4 interface address 6 RFC5305
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* IPv4 neighbor address 8 RFC5305
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* Maximum link bandwidth 9 RFC5305
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* Reservable link bandwidth 10 RFC5305
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* Unreserved bandwidth 11 RFC5305
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* TE Default metric 18 RFC5305
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* Link Protection Type 20 RFC5307
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* Interface Switching Capability 21 RFC5307
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* Remote AS number 24 RFC5316
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* IPv4 Remote ASBR identifier 25 RFC5316
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*
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*/
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/* NOTE: RFC5316 is not yet supported in this version */
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/* Following define the type of TE link regarding the various RFC */
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#define STD_TE 0x01
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#define GMPLS 0x02
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#define INTER_AS 0x04
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#define FLOOD_L1 0x10
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#define FLOOD_L2 0x20
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#define FLOOD_AS 0x40
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#define EMULATED 0x80
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#define IS_STD_TE(x) (x & STD_TE)
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#define IS_INTER_AS(x) (x & INTER_AS)
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#define IS_EMULATED(x) (x & EMULATED)
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#define IS_FLOOD_L1(x) (x & FLOOD_L1)
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#define IS_FLOOD_L2(x) (x & FLOOD_L2)
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#define IS_FLOOD_AS(x) (x & FLOOD_AS)
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#define IS_INTER_AS_EMU(x) (x & INTER_AS & EMULATED)
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#define IS_INTER_AS_AS(x) (x & INTER_AS & FLOOD_AS)
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/*
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* Following section defines subTLV (tag, length, value) structures,
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* used for Traffic Engineering.
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*/
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struct subtlv_header
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{
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u_char type; /* sub_TLV_XXX type (see above) */
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u_char length; /* Value portion only, in byte */
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};
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#define SUBTLV_HDR_SIZE 2 /* (sizeof (struct sub_tlv_header)) */
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#define SUBTLV_SIZE(stlvh) (SUBTLV_HDR_SIZE + (stlvh)->length)
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#define SUBTLV_HDR_TOP(lsph) (struct subtlv_header *)((char *)(lsph) + ISIS_LSP_HEADER_SIZE)
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#define SUBTLV_HDR_NEXT(stlvh) (struct subtlv_header *)((char *)(stlvh) + SUBTLV_SIZE(stlvh))
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#define SUBTLV_TYPE(stlvh) stlvh.header.type
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#define SUBTLV_LEN(stlvh) stlvh.header.length
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#define SUBTLV_VAL(stlvh) stlvh.value
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#define SUBTLV_DATA(stlvh) stlvh + SUBTLV_HDR_SIZE
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#define SUBTLV_DEF_SIZE 4
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/* Link Sub-TLV: Resource Class/Color - RFC 5305 */
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#define TE_SUBTLV_ADMIN_GRP 3
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struct te_subtlv_admin_grp
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{
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struct subtlv_header header; /* Value length is 4 octets. */
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u_int32_t value; /* Admin. group membership. */
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} __attribute__((__packed__));
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/* Link Local/Remote Identifiers - RFC 5307 */
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#define TE_SUBTLV_LLRI 4
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#define TE_SUBTLV_LLRI_SIZE 8
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struct te_subtlv_llri
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{
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struct subtlv_header header; /* Value length is 8 octets. */
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u_int32_t local; /* Link Local Identifier */
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u_int32_t remote; /* Link Remote Identifier */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Local Interface IP Address - RFC 5305 */
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#define TE_SUBTLV_LOCAL_IPADDR 6
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struct te_subtlv_local_ipaddr
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{
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struct subtlv_header header; /* Value length is 4 x N octets. */
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struct in_addr value; /* Local IP address(es). */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Neighbor Interface IP Address - RFC 5305 */
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#define TE_SUBTLV_RMT_IPADDR 8
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struct te_subtlv_rmt_ipaddr
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{
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struct subtlv_header header; /* Value length is 4 x N octets. */
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struct in_addr value; /* Neighbor's IP address(es). */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Maximum Bandwidth - RFC 5305 */
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#define TE_SUBTLV_MAX_BW 9
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struct te_subtlv_max_bw
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{
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struct subtlv_header header; /* Value length is 4 octets. */
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float value; /* bytes/sec */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Maximum Reservable Bandwidth - RFC 5305 */
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#define TE_SUBTLV_MAX_RSV_BW 10
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struct te_subtlv_max_rsv_bw
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{
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struct subtlv_header header; /* Value length is 4 octets. */
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float value; /* bytes/sec */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Unreserved Bandwidth - RFC 5305 */
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#define TE_SUBTLV_UNRSV_BW 11
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#define TE_SUBTLV_UNRSV_SIZE 32
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struct te_subtlv_unrsv_bw
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{
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struct subtlv_header header; /* Value length is 32 octets. */
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float value[8]; /* One for each priority level. */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Traffic Engineering Metric - RFC 5305 */
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#define TE_SUBTLV_TE_METRIC 18
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#define TE_SUBTLV_TE_METRIC_SIZE 3
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struct te_subtlv_te_metric
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{
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struct subtlv_header header; /* Value length is 4 octets. */
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u_char value[3]; /* Link metric for TE purpose. */
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} __attribute__((__packed__));
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/* Remote AS Number sub-TLV - RFC5316 */
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#define TE_SUBTLV_RAS 24
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struct te_subtlv_ras
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{
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struct subtlv_header header; /* Value length is 4 octets. */
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u_int32_t value; /* Remote AS number */
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} __attribute__((__packed__));
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/* IPv4 Remote ASBR ID Sub-TLV - RFC5316 */
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#define TE_SUBTLV_RIP 25
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struct te_subtlv_rip
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{
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struct subtlv_header header; /* Value length is 4 octets. */
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struct in_addr value; /* Remote ASBR IP address */
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} __attribute__((__packed__));
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/* TE Metric Extensions - RFC 7810 */
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/* Link Sub-TLV: Average Link Delay */
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#define TE_SUBTLV_AV_DELAY 33
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struct te_subtlv_av_delay
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{
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struct subtlv_header header; /* Value length is 4 bytes. */
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u_int32_t value; /* Average delay in micro-seconds only 24 bits => 0 ... 16777215
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with Anomalous Bit (A) as Upper most bit */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Low/High Link Delay */
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#define TE_SUBTLV_MM_DELAY 34
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#define TE_SUBTLV_MM_DELAY_SIZE 8
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struct te_subtlv_mm_delay
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{
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struct subtlv_header header; /* Value length is 8 bytes. */
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u_int32_t low; /* low delay in micro-seconds only 24 bits => 0 ... 16777215
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with Anomalous Bit (A) as Upper most bit */
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u_int32_t high; /* high delay in micro-seconds only 24 bits => 0 ... 16777215 */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Link Delay Variation i.e. Jitter */
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#define TE_SUBTLV_DELAY_VAR 35
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struct te_subtlv_delay_var
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{
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struct subtlv_header header; /* Value length is 4 bytes. */
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u_int32_t value; /* interval in micro-seconds only 24 bits => 0 ... 16777215 */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Routine Unidirectional Link Packet Loss */
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#define TE_SUBTLV_PKT_LOSS 36
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struct te_subtlv_pkt_loss
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{
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struct subtlv_header header; /* Value length is 4 bytes. */
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u_int32_t value; /* in percentage of total traffic only 24 bits (2^24 - 2)
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with Anomalous Bit (A) as Upper most bit */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Unidirectional Residual Bandwidth */ /* Optional */
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#define TE_SUBTLV_RES_BW 37
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struct te_subtlv_res_bw
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{
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struct subtlv_header header; /* Value length is 4 bytes. */
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float value; /* bandwidth in IEEE floating point format with units in bytes per second */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Unidirectional Available Bandwidth */ /* Optional */
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#define TE_SUBTLV_AVA_BW 38
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struct te_subtlv_ava_bw
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{
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struct subtlv_header header; /* Value length is 4 octets. */
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float value; /* bandwidth in IEEE floating point format with units in bytes per second */
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} __attribute__((__packed__));
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/* Link Sub-TLV: Unidirectional Utilized Bandwidth */ /* Optional */
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#define TE_SUBTLV_USE_BW 39
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struct te_subtlv_use_bw
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{
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struct subtlv_header header; /* Value length is 4 octets. */
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float value; /* bandwidth in IEEE floating point format with units in bytes per second */
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} __attribute__((__packed__));
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#define TE_SUBTLV_MAX 40 /* Last SUBTLV + 1 */
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/* Following declaration concerns the MPLS-TE and LINk-TE management */
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typedef enum _status_t { disable, enable, learn } status_t;
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/* Mode for Inter-AS LSP */ /* TODO: Check how if LSP is flooded in RFC5316 */
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typedef enum _interas_mode_t { off, region, as, emulate } interas_mode_t;
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#define IS_MPLS_TE(m) (m.status == enable)
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#define IS_CIRCUIT_TE(c) (c->status == enable)
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/* Following structure are internal use only. */
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struct isis_mpls_te
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{
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/* Status of MPLS-TE: enable or disable */
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status_t status;
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/* L1, L1-L2, L2-Only */
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u_int8_t level;
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/* RFC5316 */
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interas_mode_t inter_as;
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struct in_addr interas_areaid;
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/* Circuit list on which TE are enable */
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struct list *cir_list;
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/* MPLS_TE router ID */
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struct in_addr router_id;
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};
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extern struct isis_mpls_te isisMplsTE;
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struct mpls_te_circuit
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{
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/* Status of MPLS-TE on this interface */
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status_t status;
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/* Type of MPLS-TE circuit: STD_TE(RFC5305), INTER_AS(RFC5316), INTER_AS_EMU(RFC5316 emulated) */
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u_int8_t type;
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/* Total size of sub_tlvs */
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u_char length;
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/* Store subTLV in network byte order. */
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/* RFC5305 */
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struct te_subtlv_admin_grp admin_grp;
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/* RFC5307 */
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struct te_subtlv_llri llri;
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/* RFC5305 */
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struct te_subtlv_local_ipaddr local_ipaddr;
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struct te_subtlv_rmt_ipaddr rmt_ipaddr;
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struct te_subtlv_max_bw max_bw;
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struct te_subtlv_max_rsv_bw max_rsv_bw;
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struct te_subtlv_unrsv_bw unrsv_bw;
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struct te_subtlv_te_metric te_metric;
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/* RFC5316 */
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struct te_subtlv_ras ras;
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struct te_subtlv_rip rip;
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/* RFC7810 */
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struct te_subtlv_av_delay av_delay;
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struct te_subtlv_mm_delay mm_delay;
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struct te_subtlv_delay_var delay_var;
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struct te_subtlv_pkt_loss pkt_loss;
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struct te_subtlv_res_bw res_bw;
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struct te_subtlv_ava_bw ava_bw;
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struct te_subtlv_use_bw use_bw;
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};
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/* Prototypes. */
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void isis_mpls_te_init (void);
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struct mpls_te_circuit *mpls_te_circuit_new(void);
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void mpls_te_print_detail(struct vty *, struct te_is_neigh *);
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void set_circuitparams_local_ipaddr (struct mpls_te_circuit *, struct in_addr);
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void set_circuitparams_rmt_ipaddr (struct mpls_te_circuit *, struct in_addr);
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u_char subtlvs_len (struct mpls_te_circuit *);
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u_char add_te_subtlvs(u_char *, struct mpls_te_circuit *);
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u_char build_te_subtlvs(u_char *, struct isis_circuit *);
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void isis_link_params_update(struct isis_circuit *, struct interface *);
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void isis_mpls_te_update(struct interface *);
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void isis_mpls_te_config_write_router (struct vty *);
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#endif /* _ZEBRA_ISIS_MPLS_TE_H */
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