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057e9df2cc
Add `struct isis_srv6_sid_structure` data structure to represent an SRv6 SID structure (as defined in RFC 8986 section #3.1). The struct has the following members: * loc_block_len: locator block length * loc_node_len: locator node length * func_len: function length * arg_len: argument length Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* This is an implementation of Segment Routing over IPv6 (SRv6) for IS-IS
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* as per RFC 9352
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* https://datatracker.ietf.org/doc/html/rfc9352
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*
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* Copyright (C) 2023 Carmine Scarpitta - University of Rome Tor Vergata
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*/
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#ifndef _FRR_ISIS_SRV6_H
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#define _FRR_ISIS_SRV6_H
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#include "lib/srv6.h"
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/* Maximum SRv6 SID Depths supported by the router */
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#define SRV6_MAX_SEG_LEFT 3
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#define SRV6_MAX_END_POP 3
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#define SRV6_MAX_H_ENCAPS 2
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#define SRV6_MAX_END_D 5
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/* SRv6 SID structure */
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struct isis_srv6_sid_structure {
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uint8_t loc_block_len;
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uint8_t loc_node_len;
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uint8_t func_len;
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uint8_t arg_len;
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};
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/* SRv6 SID not bound to any adjacency */
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struct isis_srv6_sid {
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struct isis_srv6_sid *next;
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/* SID flags */
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uint8_t flags;
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/* SID value */
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struct in6_addr sid;
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/* Endpoint behavior bound to the SID */
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enum srv6_endpoint_behavior_codepoint behavior;
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/* Parent SRv6 locator */
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struct srv6_locator_chunk *locator;
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/* Backpointer to IS-IS area */
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struct isis_area *area;
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};
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/* Per-area IS-IS SRv6 Data Base (SRv6 DB) */
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struct isis_srv6_db {
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/* List of SRv6 Locator chunks */
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struct list *srv6_locator_chunks;
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/* Area SRv6 configuration. */
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struct {
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/* Administrative status of SRv6 */
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bool enabled;
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/* Name of the SRv6 Locator */
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char srv6_locator_name[SRV6_LOCNAME_SIZE];
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/* Maximum Segments Left Depth supported by the router */
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uint8_t max_seg_left_msd;
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/* Maximum Maximum End Pop Depth supported by the router */
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uint8_t max_end_pop_msd;
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/* Maximum H.Encaps supported by the router */
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uint8_t max_h_encaps_msd;
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/* Maximum End D MSD supported by the router */
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uint8_t max_end_d_msd;
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} config;
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};
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bool isis_srv6_locator_unset(struct isis_area *area);
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extern void isis_srv6_area_init(struct isis_area *area);
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extern void isis_srv6_area_term(struct isis_area *area);
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void isis_srv6_init(void);
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void isis_srv6_term(void);
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#endif /* _FRR_ISIS_SRV6_H */
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