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isisd: Add func to build Sub-TLV from SRv6 End SID
Add a function to build an SRv6 End SID TLV (RFC 9352 section #7.2) to advertise a specific SRv6 End SID passed as an argument. Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
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@ -7732,6 +7732,40 @@ void isis_tlvs_set_purge_originator(struct isis_tlvs *tlvs,
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}
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}
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/* Add an SRv6 End SID to the SRv6 End SID Sub-TLV */
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void isis_subtlvs_add_srv6_end_sid(struct isis_subtlvs *subtlvs,
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struct isis_srv6_sid *sid)
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{
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struct isis_srv6_end_sid_subtlv *sid_subtlv;
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if (!sid)
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return;
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/* The SRv6 End SID Sub-TLV advertises SRv6 SIDs with Endpoint behaviors
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* that do not require a particular neighbor in order to be correctly
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* applied (e.g. End, End.DT6, ...). Before proceeding, let's make sure
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* we are encoding one of the supported behaviors. */
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if (sid->behavior != SRV6_ENDPOINT_BEHAVIOR_END &&
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sid->behavior != SRV6_ENDPOINT_BEHAVIOR_END_NEXT_CSID &&
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sid->behavior != SRV6_ENDPOINT_BEHAVIOR_END_DT6 &&
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sid->behavior != SRV6_ENDPOINT_BEHAVIOR_END_DT6_USID &&
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sid->behavior != SRV6_ENDPOINT_BEHAVIOR_END_DT4 &&
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sid->behavior != SRV6_ENDPOINT_BEHAVIOR_END_DT4_USID &&
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sid->behavior != SRV6_ENDPOINT_BEHAVIOR_END_DT46 &&
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sid->behavior != SRV6_ENDPOINT_BEHAVIOR_END_DT46_USID)
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return;
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/* Allocate memory for the Sub-TLV */
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sid_subtlv = XCALLOC(MTYPE_ISIS_SUBTLV, sizeof(*sid_subtlv));
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/* Fill in the SRv6 End SID Sub-TLV according to the SRv6 SID
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* configuration */
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isis_srv6_end_sid2subtlv(sid, sid_subtlv);
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/* Append the SRv6 End SID Sub-TLV to the Sub-TLVs list */
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append_item(&subtlvs->srv6_end_sids, (struct isis_item *)sid_subtlv);
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}
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/* Add an SRv6 Locator to the SRv6 Locator TLV */
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void isis_tlvs_add_srv6_locator(struct isis_tlvs *tlvs, uint16_t mtid,
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struct isis_srv6_locator *loc)
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@ -22,6 +22,7 @@ DECLARE_MTYPE(ISIS_SUBTLV);
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struct lspdb_head;
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struct sr_prefix_cfg;
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struct isis_srv6_sid;
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struct isis_srv6_locator;
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struct isis_area_address {
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@ -834,6 +835,8 @@ void isis_tlvs_set_purge_originator(struct isis_tlvs *tlvs,
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const uint8_t *generator,
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const uint8_t *sender);
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void isis_subtlvs_add_srv6_end_sid(struct isis_subtlvs *subtlvs,
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struct isis_srv6_sid *sid);
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void isis_tlvs_add_srv6_locator(struct isis_tlvs *tlvs, uint16_t mtid,
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struct isis_srv6_locator *loc);
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#endif
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