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bgpd: add transpose operation

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if advertisement with SID structure Sub-Sub-TLV, we need to transpose
SID, so added transpose operation into bgp_update.

Signed-off-by: Ryoga Saito <contact@proelbtn.com>
This commit is contained in:
Ryoga Saito 2021-08-31 06:56:00 +00:00
parent 9299fd00e7
commit cc8f05dfdc
1 changed files with 25 additions and 0 deletions
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25
bgpd/bgp_route.c
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@ -4044,6 +4044,20 @@ int bgp_update(struct peer *peer, const struct prefix *p, uint32_t addpath_id,
sid_copy(&extra->sid[0],
&attr->srv6_l3vpn->sid);
extra->num_sids = 1;
/*
* draft-ietf-bess-srv6-services-07
* The part of SRv6 SID may be encoded as MPLS
* Label for the efficient packing.
*/
if (attr->srv6_l3vpn->transposition_len != 0)
transpose_sid(
&extra->sid[0],
decode_label(label),
attr->srv6_l3vpn
->transposition_offset,
attr->srv6_l3vpn
->transposition_len);
}
} else if (attr->srv6_vpn) {
extra = bgp_path_info_extra_get(pi);
@ -4231,6 +4245,17 @@ int bgp_update(struct peer *peer, const struct prefix *p, uint32_t addpath_id,
if (attr->srv6_l3vpn) {
sid_copy(&extra->sid[0], &attr->srv6_l3vpn->sid);
extra->num_sids = 1;
/*
* draft-ietf-bess-srv6-services-07
* The part of SRv6 SID may be encoded as MPLS Label for
* the efficient packing.
*/
if (attr->srv6_l3vpn->transposition_len != 0)
transpose_sid(
&extra->sid[0], decode_label(label),
attr->srv6_l3vpn->transposition_offset,
attr->srv6_l3vpn->transposition_len);
} else if (attr->srv6_vpn) {
sid_copy(&extra->sid[0], &attr->srv6_vpn->sid);
extra->num_sids = 1;