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bgpd: when nexthop IP is available for flowspec, keep it

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keep original nexthop IP address when propagating bgp updates to other
peers.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
This commit is contained in:
Philippe Guibert 2020-01-21 13:15:42 +01:00
parent e164eb7012
commit 211ee7aa63
1 changed files with 8 additions and 1 deletions
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9
bgpd/bgp_attr.c
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@ -2970,6 +2970,8 @@ size_t bgp_packet_mpattr_start(struct stream *s, struct peer *peer, afi_t afi,
safi == SAFI_LABELED_UNICAST || safi == SAFI_LABELED_UNICAST ||
safi == SAFI_MULTICAST)) safi == SAFI_MULTICAST))
nh_afi = peer_cap_enhe(peer, afi, safi) ? AFI_IP6 : AFI_IP; nh_afi = peer_cap_enhe(peer, afi, safi) ? AFI_IP6 : AFI_IP;
else if (safi == SAFI_FLOWSPEC)
nh_afi = afi;
else else
nh_afi = BGP_NEXTHOP_AFI_FROM_NHLEN(attr->mp_nexthop_len); nh_afi = BGP_NEXTHOP_AFI_FROM_NHLEN(attr->mp_nexthop_len);
@ -2996,7 +2998,12 @@ size_t bgp_packet_mpattr_start(struct stream *s, struct peer *peer, afi_t afi,
stream_put(s, &attr->mp_nexthop_global_in, 4); stream_put(s, &attr->mp_nexthop_global_in, 4);
break; break;
case SAFI_FLOWSPEC: case SAFI_FLOWSPEC:
stream_putc(s, 0); /* no nexthop for flowspec */ if (attr->mp_nexthop_len == 0)
stream_putc(s, 0); /* no nexthop for flowspec */
else {
stream_putc(s, attr->mp_nexthop_len);
stream_put_ipv4(s, attr->nexthop.s_addr);
}
default: default:
break; break;
} }