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bgpd: Allow generating EVPN type-5 routes with existing extended community

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The EVPN advertise route-map may generate extended communities for an IPv4
or IPv6 route injected into EVPN as type-5. If so, allow for it and add
to it.

Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Reviewed-by:   Don Slice <dslice@cumulusnetworks.com>
Reviewed-by:   Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
vivek 2020-03-24 14:58:42 -07:00
parent ae0eaca5ce
commit fab92da7ca
1 changed files with 9 additions and 1 deletions
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10
bgpd/bgp_evpn.c
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@ -744,6 +744,7 @@ static void build_evpn_type5_route_extcomm(struct bgp *bgp_vrf,
bgp_encap_types tnl_type; bgp_encap_types tnl_type;
struct listnode *node, *nnode; struct listnode *node, *nnode;
struct ecommunity *ecom; struct ecommunity *ecom;
struct ecommunity *old_ecom;
struct list *vrf_export_rtl = NULL; struct list *vrf_export_rtl = NULL;
/* Encap */ /* Encap */
@ -754,7 +755,14 @@ static void build_evpn_type5_route_extcomm(struct bgp *bgp_vrf,
ecom_encap.val = (uint8_t *)eval.val; ecom_encap.val = (uint8_t *)eval.val;
/* Add Encap */ /* Add Encap */
attr->ecommunity = ecommunity_dup(&ecom_encap); if (attr->ecommunity) {
old_ecom = attr->ecommunity;
ecom = ecommunity_merge(ecommunity_dup(old_ecom), &ecom_encap);
if (!old_ecom->refcnt)
ecommunity_free(&old_ecom);
} else
ecom = ecommunity_dup(&ecom_encap);
attr->ecommunity = ecom;
/* Add the export RTs for L3VNI/VRF */ /* Add the export RTs for L3VNI/VRF */
vrf_export_rtl = bgp_vrf->vrf_export_rtl; vrf_export_rtl = bgp_vrf->vrf_export_rtl;