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bgpd: evpn RT-5 bgp update carries nexthop attribute

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This patch appends nexthop attribute to EVPN message, in addition
to appending gateway IP in RT-5 NLRI itself. In reception, if
both informations are stored, then the GW IP information will
supersede the NLRI nexthop attribute.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
This commit is contained in:
Philippe Guibert 2016-09-05 15:54:49 +02:00
parent 684a7227bd
commit e9cf8c8ece
1 changed files with 33 additions and 0 deletions
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33
bgpd/bgp_attr.c
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@ -2812,6 +2812,39 @@ bgp_packet_mpattr_start (struct stream *s, afi_t afi, safi_t safi, afi_t nh_afi,
break;
}
break;
case AFI_L2VPN:
switch (safi)
{
case SAFI_EVPN:
if (attr->extra->mp_nexthop_len == BGP_ATTR_NHLEN_VPNV4)
{
stream_putc (s, 12);
stream_putl (s, 0); /* RD = 0, per RFC */
stream_putl (s, 0);
stream_put (s, &attr->extra->mp_nexthop_global_in, 4);
}
else if (attr->extra->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL)
{
stream_putc (s, 24);
stream_putl (s, 0); /* RD = 0, per RFC */
stream_putl (s, 0);
stream_put (s, &attr->extra->mp_nexthop_global, IPV6_MAX_BYTELEN);
}
else if (attr->extra->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL)
{
stream_putc (s, 48);
stream_putl (s, 0); /* RD = 0, per RFC */
stream_putl (s, 0);
stream_put (s, &attr->extra->mp_nexthop_global, IPV6_MAX_BYTELEN);
stream_putl (s, 0); /* RD = 0, per RFC */
stream_putl (s, 0);
stream_put (s, &attr->extra->mp_nexthop_local, IPV6_MAX_BYTELEN);
}
break;
break;
default:
break;
}
default:
break;
}