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isisd: Add SRv6 SID data structure

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Add `struct isis_srv6_sid` data structure to represent an SRv6 SID.

The struct has the following members:
* next: pointer to the next SID, used to build linked lists of SRv6 SIDs
* flags: SID flags
* behavior: the behavior bound to the SRv6 SID (as defined in RFC 8986)
* value: the SID value (i.e., an IPv6 address)
* locator: a backpointer to the parent locator from which the SID has
been allocated.

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
This commit is contained in:
Carmine Scarpitta 2023-03-14 02:40:34 +01:00
parent 70fba45daf
commit e047b39dc1
1 changed files with 22 additions and 0 deletions
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22
isisd/isis_srv6.h
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@ -10,12 +10,34 @@
#ifndef _FRR_ISIS_SRV6_H
#define _FRR_ISIS_SRV6_H
#include "lib/srv6.h"
/* Maximum SRv6 SID Depths supported by the router */
#define SRV6_MAX_SEG_LEFT 3
#define SRV6_MAX_END_POP 3
#define SRV6_MAX_H_ENCAPS 2
#define SRV6_MAX_END_D 5
/* SRv6 SID not bound to any adjacency */
struct isis_srv6_sid {
struct isis_srv6_sid *next;
/* SID flags */
uint8_t flags;
/* SID value */
struct in6_addr sid;
/* Endpoint behavior bound to the SID */
enum srv6_endpoint_behavior_codepoint behavior;
/* Parent SRv6 locator */
struct srv6_locator_chunk *locator;
/* Backpointer to IS-IS area */
struct isis_area *area;
};
/* Per-area IS-IS SRv6 Data Base (SRv6 DB) */
struct isis_srv6_db {