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isisd: Add data structure for SRv6 Adjacency SIDs

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An SRv6 adjacency SID is a SID that is associated with a particular
adjacency. Adjacency SIDs are advertised using the SRv6 End.X SID
Sub-TLV (RFC 9352 section #8.1) or SRv6 LAN End.X SID Sub-TLV (RFC 9352
section #8.2).

This commit defines a data structure `srv6_adjacency` for storing
information about an SRv6 Adjacency SID. This data structure will be
used to support SRv6 Adjacency SIDs functionalities in future commits.

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
This commit is contained in:
Carmine Scarpitta 2023-06-03 22:06:04 +02:00
parent df121f68e7
commit 2566656a6f
1 changed files with 42 additions and 0 deletions
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42
isisd/isis_srv6.h
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@ -69,6 +69,48 @@ struct isis_srv6_locator {
struct list *srv6_sid;
};
/* SRv6 Adjacency-SID type */
enum srv6_adj_type {
ISIS_SRV6_ADJ_NORMAL = 0,
ISIS_SRV6_LAN_BACKUP,
};
/* SRv6 Adjacency. */
struct srv6_adjacency {
/* Adjacency type */
enum srv6_adj_type type;
/* SID flags */
uint8_t flags;
/* SID value */
struct in6_addr sid;
/* Endpoint behavior bound to the SID */
enum srv6_endpoint_behavior_codepoint behavior;
/* SRv6 SID structure */
struct isis_srv6_sid_structure structure;
/* Parent SRv6 locator */
struct srv6_locator_chunk *locator;
/* Adjacency-SID nexthop information */
struct in6_addr nexthop;
/* End.X SID TI-LFA backup nexthops */
struct list *backup_nexthops;
/* SRv6 (LAN) End.X SID Sub-TLV */
union {
struct isis_srv6_endx_sid_subtlv *endx_sid;
struct isis_srv6_lan_endx_sid_subtlv *lendx_sid;
} u;
/* Back pointer to IS-IS adjacency. */
struct isis_adjacency *adj;
};
/* Per-area IS-IS SRv6 Data Base (SRv6 DB) */
struct isis_srv6_db {