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/*
* IS-IS Rout(e)ing protocol - isis_te.c
*
* This is an implementation of RFC5305, RFC 5307 and RFC 7810
*
* Author: Olivier Dugeon <olivier.dugeon@orange.com>
*
* Copyright (C) 2014 - 2019 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 fully supported in this version
* only subTLVs decoding is provided
*/
/* 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)
/*
* Note (since release 7.2), subTLVs definition, serialization
* and de-serialization have mode to isis_tlvs.[c,h]
*/
/* 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_EXT_TE(e) (e && e->status != 0 \
&& e->status != EXT_ADJ_SID \
&& e->status != EXT_LAN_ADJ_SID)
#define IS_MPLS_TE(a) (a && a->status == enable)
#define IS_EXPORT_TE(a) (a->export)
/* Per area MPLS-TE parameters */
struct ls_ted;
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 IPv4 & IPv6 Router IDs */
struct in_addr router_id;
struct in6_addr router_id_ipv6;
/* Link State Database */
struct ls_ted *ted;
bool export;
};
/* Structure to provide parameters to lsp iterate callback function */
struct isis_te_args {
struct ls_ted *ted;
struct ls_vertex *vertex;
bool export;
};
enum lsp_event { LSP_UNKNOWN, LSP_ADD, LSP_UPD, LSP_DEL, LSP_INC, LSP_TICK };
/* Prototypes. */
void isis_mpls_te_init(void);
void isis_mpls_te_create(struct isis_area *area);
void isis_mpls_te_disable(struct isis_area *area);
void isis_mpls_te_term(struct isis_area *area);
void isis_link_params_update(struct isis_circuit *, struct interface *);
int isis_mpls_te_update(struct interface *);
void isis_te_lsp_event(struct isis_lsp *lsp, enum lsp_event event);
int isis_te_sync_ted(struct zapi_opaque_reg_info dst);
void isis_te_init_ted(struct isis_area *area);
#endif /* _ZEBRA_ISIS_MPLS_TE_H */
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