mirror of https://github.com/FRRouting/frr.git
122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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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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* Author: Olivier Dugeon <olivier.dugeon@orange.com>
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*
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* Copyright (C) 2014 - 2019 Orange Labs http://www.orange.com
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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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* NOTE: RFC5316 is not fully supported in this version
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* only subTLVs decoding is provided
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*/
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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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* Note (since release 7.2), subTLVs definition, serialization
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* and de-serialization have mode to isis_tlvs.[c,h]
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*/
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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_EXT_TE(e) \
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(e && e->status != 0 && e->status != EXT_ADJ_SID && \
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e->status != EXT_LAN_ADJ_SID && e->status != EXT_SRV6_ENDX_SID && \
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e->status != EXT_SRV6_LAN_ENDX_SID)
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#define IS_MPLS_TE(a) (a && a->status == enable)
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#define IS_EXPORT_TE(a) (a->export)
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/* Per area MPLS-TE parameters */
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struct ls_ted;
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struct mpls_te_area {
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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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uint8_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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/* MPLS_TE IPv4 & IPv6 Router IDs */
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struct in_addr router_id;
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struct in6_addr router_id_ipv6;
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/* Link State Database */
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struct ls_ted *ted;
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bool export;
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};
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/* Structure to provide parameters to lsp iterate callback function */
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struct isis_te_args {
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struct ls_ted *ted;
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struct ls_vertex *vertex;
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bool export;
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};
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enum lsp_event { LSP_UNKNOWN, LSP_ADD, LSP_UPD, LSP_DEL, LSP_INC, LSP_TICK };
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/* Prototypes. */
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void isis_mpls_te_init(void);
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void isis_mpls_te_create(struct isis_area *area);
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void isis_mpls_te_disable(struct isis_area *area);
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void isis_mpls_te_term(struct isis_area *area);
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void isis_link_params_update(struct isis_circuit *, struct interface *);
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int isis_mpls_te_update(struct interface *);
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void isis_te_lsp_event(struct isis_lsp *lsp, enum lsp_event event);
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int isis_te_sync_ted(struct zapi_opaque_reg_info dst);
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void isis_te_init_ted(struct isis_area *area);
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#endif /* _ZEBRA_ISIS_MPLS_TE_H */
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