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/*
* IS-IS Rout(e)ing protocol - isis_te.c
*
* This is an implementation of RFC5305, RFC 5307 and RFC 7810
*
* Copyright (C) 2014 Orange Labs
* http://www.orange.com
*
* 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_ISIS_MPLS_TE_H
#define _ZEBRA_ISIS_MPLS_TE_H
/*
* Traffic Engineering information are transport through LSP:
* - Extended IS Reachability TLV = 22
* - Traffic Engineering Router ID TLV = 134
* - Extended IP Reachability TLV = 135
* - Inter-AS Reachability Information TLV = 141
*
* and support following sub-TLV:
*
* Name Value Status
* _________________________________________________
* Administartive group (color) 3 RFC5305
* Link Local/Remote Identifiers 4 RFC5307
* IPv4 interface address 6 RFC5305
* IPv4 neighbor address 8 RFC5305
* Maximum link bandwidth 9 RFC5305
* Reservable link bandwidth 10 RFC5305
* Unreserved bandwidth 11 RFC5305
* TE Default metric 18 RFC5305
* Link Protection Type 20 RFC5307
* Interface Switching Capability 21 RFC5307
* Remote AS number 24 RFC5316
* IPv4 Remote ASBR identifier 25 RFC5316
*
*/
/* NOTE: RFC5316 is not yet supported in this version */
/* Following define the type of TE link regarding the various RFC */
#define STD_TE 0x01
#define GMPLS 0x02
#define INTER_AS 0x04
#define FLOOD_L1 0x10
#define FLOOD_L2 0x20
#define FLOOD_AS 0x40
#define EMULATED 0x80
#define IS_STD_TE(x) (x & STD_TE)
#define IS_INTER_AS(x) (x & INTER_AS)
#define IS_EMULATED(x) (x & EMULATED)
#define IS_FLOOD_L1(x) (x & FLOOD_L1)
#define IS_FLOOD_L2(x) (x & FLOOD_L2)
#define IS_FLOOD_AS(x) (x & FLOOD_AS)
#define IS_INTER_AS_EMU(x) (x & INTER_AS & EMULATED)
#define IS_INTER_AS_AS(x) (x & INTER_AS & FLOOD_AS)
/*
* Following section defines subTLV (tag, length, value) structures,
* used for Traffic Engineering.
*/
struct subtlv_header {
uint8_t type; /* sub_TLV_XXX type (see above) */
uint8_t length; /* Value portion only, in byte */
};
#define MAX_SUBTLV_SIZE 256
#define SUBTLV_HDR_SIZE 2 /* (sizeof (struct sub_tlv_header)) */
#define SUBTLV_SIZE(stlvh) (SUBTLV_HDR_SIZE + (stlvh)->length)
#define SUBTLV_HDR_TOP(lsph) (struct subtlv_header *)((char *)(lsph) + ISIS_LSP_HEADER_SIZE)
#define SUBTLV_HDR_NEXT(stlvh) (struct subtlv_header *)((char *)(stlvh) + SUBTLV_SIZE(stlvh))
#define SUBTLV_TYPE(stlvh) stlvh.header.type
#define SUBTLV_LEN(stlvh) stlvh.header.length
#define SUBTLV_VAL(stlvh) stlvh.value
#define SUBTLV_DATA(stlvh) stlvh + SUBTLV_HDR_SIZE
#define SUBTLV_DEF_SIZE 4
/* Link Sub-TLV: Resource Class/Color - RFC 5305 */
#define TE_SUBTLV_ADMIN_GRP 3
struct te_subtlv_admin_grp {
struct subtlv_header header; /* Value length is 4 octets. */
uint32_t value; /* Admin. group membership. */
} __attribute__((__packed__));
/* Link Local/Remote Identifiers - RFC 5307 */
#define TE_SUBTLV_LLRI 4
#define TE_SUBTLV_LLRI_SIZE 8
struct te_subtlv_llri {
struct subtlv_header header; /* Value length is 8 octets. */
uint32_t local; /* Link Local Identifier */
uint32_t remote; /* Link Remote Identifier */
} __attribute__((__packed__));
/* Link Sub-TLV: Local Interface IP Address - RFC 5305 */
#define TE_SUBTLV_LOCAL_IPADDR 6
struct te_subtlv_local_ipaddr {
struct subtlv_header header; /* Value length is 4 x N octets. */
struct in_addr value; /* Local IP address(es). */
} __attribute__((__packed__));
/* Link Sub-TLV: Neighbor Interface IP Address - RFC 5305 */
#define TE_SUBTLV_RMT_IPADDR 8
struct te_subtlv_rmt_ipaddr {
struct subtlv_header header; /* Value length is 4 x N octets. */
struct in_addr value; /* Neighbor's IP address(es). */
} __attribute__((__packed__));
/* Link Sub-TLV: Maximum Bandwidth - RFC 5305 */
#define TE_SUBTLV_MAX_BW 9
struct te_subtlv_max_bw {
struct subtlv_header header; /* Value length is 4 octets. */
float value; /* bytes/sec */
} __attribute__((__packed__));
/* Link Sub-TLV: Maximum Reservable Bandwidth - RFC 5305 */
#define TE_SUBTLV_MAX_RSV_BW 10
struct te_subtlv_max_rsv_bw {
struct subtlv_header header; /* Value length is 4 octets. */
float value; /* bytes/sec */
} __attribute__((__packed__));
/* Link Sub-TLV: Unreserved Bandwidth - RFC 5305 */
#define TE_SUBTLV_UNRSV_BW 11
#define TE_SUBTLV_UNRSV_SIZE 32
struct te_subtlv_unrsv_bw {
struct subtlv_header header; /* Value length is 32 octets. */
float value[8]; /* One for each priority level. */
} __attribute__((__packed__));
/* Link Sub-TLV: Traffic Engineering Metric - RFC 5305 */
#define TE_SUBTLV_TE_METRIC 18
#define TE_SUBTLV_TE_METRIC_SIZE 3
struct te_subtlv_te_metric {
struct subtlv_header header; /* Value length is 4 octets. */
uint8_t value[3]; /* Link metric for TE purpose. */
} __attribute__((__packed__));
/* Remote AS Number sub-TLV - RFC5316 */
#define TE_SUBTLV_RAS 24
struct te_subtlv_ras {
struct subtlv_header header; /* Value length is 4 octets. */
uint32_t value; /* Remote AS number */
} __attribute__((__packed__));
/* IPv4 Remote ASBR ID Sub-TLV - RFC5316 */
#define TE_SUBTLV_RIP 25
struct te_subtlv_rip {
struct subtlv_header header; /* Value length is 4 octets. */
struct in_addr value; /* Remote ASBR IP address */
} __attribute__((__packed__));
/* TE Metric Extensions - RFC 7810 */
/* Link Sub-TLV: Average Link Delay */
#define TE_SUBTLV_AV_DELAY 33
struct te_subtlv_av_delay {
struct subtlv_header header; /* Value length is 4 bytes. */
uint32_t value; /* Average delay in micro-seconds only 24 bits => 0 ...
16777215
with Anomalous Bit (A) as Upper most bit */
} __attribute__((__packed__));
/* Link Sub-TLV: Low/High Link Delay */
#define TE_SUBTLV_MM_DELAY 34
#define TE_SUBTLV_MM_DELAY_SIZE 8
struct te_subtlv_mm_delay {
struct subtlv_header header; /* Value length is 8 bytes. */
uint32_t low; /* low delay in micro-seconds only 24 bits => 0 ...
16777215
with Anomalous Bit (A) as Upper most bit */
uint32_t high; /* high delay in micro-seconds only 24 bits => 0 ...
16777215 */
} __attribute__((__packed__));
/* Link Sub-TLV: Link Delay Variation i.e. Jitter */
#define TE_SUBTLV_DELAY_VAR 35
struct te_subtlv_delay_var {
struct subtlv_header header; /* Value length is 4 bytes. */
uint32_t value; /* interval in micro-seconds only 24 bits => 0 ...
16777215 */
} __attribute__((__packed__));
/* Link Sub-TLV: Routine Unidirectional Link Packet Loss */
#define TE_SUBTLV_PKT_LOSS 36
struct te_subtlv_pkt_loss {
struct subtlv_header header; /* Value length is 4 bytes. */
uint32_t
value; /* in percentage of total traffic only 24 bits (2^24 - 2)
with Anomalous Bit (A) as Upper most bit */
} __attribute__((__packed__));
/* Link Sub-TLV: Unidirectional Residual Bandwidth */ /* Optional */
#define TE_SUBTLV_RES_BW 37
struct te_subtlv_res_bw {
struct subtlv_header header; /* Value length is 4 bytes. */
float value; /* bandwidth in IEEE floating point format with units in
bytes per second */
} __attribute__((__packed__));
/* Link Sub-TLV: Unidirectional Available Bandwidth */ /* Optional */
#define TE_SUBTLV_AVA_BW 38
struct te_subtlv_ava_bw {
struct subtlv_header header; /* Value length is 4 octets. */
float value; /* bandwidth in IEEE floating point format with units in
bytes per second */
} __attribute__((__packed__));
/* Link Sub-TLV: Unidirectional Utilized Bandwidth */ /* Optional */
#define TE_SUBTLV_USE_BW 39
struct te_subtlv_use_bw {
struct subtlv_header header; /* Value length is 4 octets. */
float value; /* bandwidth in IEEE floating point format with units in
bytes per second */
} __attribute__((__packed__));
#define TE_SUBTLV_MAX 40 /* Last SUBTLV + 1 */
/* Following declaration concerns the MPLS-TE and LINk-TE management */
typedef enum _status_t { disable, enable, learn } status_t;
/* Mode for Inter-AS LSP */ /* TODO: Check how if LSP is flooded in RFC5316 */
typedef enum _interas_mode_t { off, region, as, emulate } interas_mode_t;
#define IS_MPLS_TE(m) (m && m->status == enable)
/* Per area MPLS-TE parameters */
struct mpls_te_area {
/* Status of MPLS-TE: enable or disable */
status_t status;
/* L1, L1-L2, L2-Only */
uint8_t level;
/* RFC5316 */
interas_mode_t inter_as;
struct in_addr interas_areaid;
/* MPLS_TE router ID */
struct in_addr router_id;
};
/* Per Circuit MPLS-TE parameters */
struct mpls_te_circuit {
/* Status of MPLS-TE on this interface */
status_t status;
/* Type of MPLS-TE circuit: STD_TE(RFC5305), INTER_AS(RFC5316),
* INTER_AS_EMU(RFC5316 emulated) */
uint8_t type;
/* Total size of sub_tlvs */
uint8_t length;
/* Store subTLV in network byte order. */
/* RFC5305 */
struct te_subtlv_admin_grp admin_grp;
/* RFC5307 */
struct te_subtlv_llri llri;
/* RFC5305 */
struct te_subtlv_local_ipaddr local_ipaddr;
struct te_subtlv_rmt_ipaddr rmt_ipaddr;
struct te_subtlv_max_bw max_bw;
struct te_subtlv_max_rsv_bw max_rsv_bw;
struct te_subtlv_unrsv_bw unrsv_bw;
struct te_subtlv_te_metric te_metric;
/* RFC5316 */
struct te_subtlv_ras ras;
struct te_subtlv_rip rip;
/* RFC7810 */
struct te_subtlv_av_delay av_delay;
struct te_subtlv_mm_delay mm_delay;
struct te_subtlv_delay_var delay_var;
struct te_subtlv_pkt_loss pkt_loss;
struct te_subtlv_res_bw res_bw;
struct te_subtlv_ava_bw ava_bw;
struct te_subtlv_use_bw use_bw;
};
/* Prototypes. */
void isis_mpls_te_init(void);
struct mpls_te_circuit *mpls_te_circuit_new(void);
struct sbuf;
void mpls_te_print_detail(struct sbuf *buf, int indent, uint8_t *subtlvs,
uint8_t subtlv_len);
void set_circuitparams_local_ipaddr(struct mpls_te_circuit *, struct in_addr);
void set_circuitparams_rmt_ipaddr(struct mpls_te_circuit *, struct in_addr);
uint8_t subtlvs_len(struct mpls_te_circuit *);
uint8_t add_te_subtlvs(uint8_t *, struct mpls_te_circuit *);
uint8_t build_te_subtlvs(uint8_t *, struct isis_circuit *);
void isis_link_params_update(struct isis_circuit *, struct interface *);
void isis_mpls_te_update(struct interface *);
#endif /* _ZEBRA_ISIS_MPLS_TE_H */
|
