diff options
Diffstat (limited to 'bgpd/bgp_attr.c')
| -rw-r--r-- | bgpd/bgp_attr.c | 52 |
1 files changed, 47 insertions, 5 deletions
diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c index 480bb912..91a0e07c 100644 --- a/bgpd/bgp_attr.c +++ b/bgpd/bgp_attr.c @@ -1738,7 +1738,8 @@ bgp_attr_init () /* Make attribute packet. */ void -bgp_dump_routes_attr (struct stream *s, struct attr *attr) +bgp_dump_routes_attr (struct stream *s, struct attr *attr, + struct prefix *prefix) { unsigned long cp; unsigned long len; @@ -1773,10 +1774,18 @@ bgp_dump_routes_attr (struct stream *s, struct attr *attr) stream_put (s, aspath->data, aspath->length); /* Nexthop attribute. */ - stream_putc (s, BGP_ATTR_FLAG_TRANS); - stream_putc (s, BGP_ATTR_NEXT_HOP); - stream_putc (s, 4); - stream_put_ipv4 (s, attr->nexthop.s_addr); + /* If it's an IPv6 prefix, don't dump the IPv4 nexthop to save space */ + if(prefix != NULL +#ifdef HAVE_IPV6 + && prefix->family != AF_INET6 +#endif /* HAVE_IPV6 */ + ) + { + stream_putc (s, BGP_ATTR_FLAG_TRANS); + stream_putc (s, BGP_ATTR_NEXT_HOP); + stream_putc (s, 4); + stream_put_ipv4 (s, attr->nexthop.s_addr); + } /* MED attribute. */ if (attr->flag & ATTR_FLAG_BIT (BGP_ATTR_MULTI_EXIT_DISC)) @@ -1832,6 +1841,39 @@ bgp_dump_routes_attr (struct stream *s, struct attr *attr) stream_put (s, attr->community->val, attr->community->size * 4); } +#ifdef HAVE_IPV6 + /* Add a MP_NLRI attribute to dump the IPv6 next hop */ + if(prefix != NULL && prefix->family == AF_INET6 && + (attr->mp_nexthop_len == 16 || attr->mp_nexthop_len == 32) ) + { + int sizep; + + stream_putc(s, BGP_ATTR_FLAG_OPTIONAL); + stream_putc(s, BGP_ATTR_MP_REACH_NLRI); + sizep = stream_get_putp (s); + + /* MP header */ + stream_putc (s, 0); /* Length of this attribute. */ + stream_putw(s, AFI_IP6); /* AFI */ + stream_putc(s, SAFI_UNICAST); /* SAFI */ + + /* Next hop */ + stream_putc(s, attr->mp_nexthop_len); + stream_put(s, &attr->mp_nexthop_global, 16); + if(attr->mp_nexthop_len == 32) + stream_put(s, &attr->mp_nexthop_local, 16); + + /* SNPA */ + stream_putc(s, 0); + + /* Prefix */ + stream_put_prefix(s, prefix); + + /* Set MP attribute length. */ + stream_putc_at (s, sizep, (stream_get_putp (s) - sizep) - 1); + } +#endif /* HAVE_IPV6 */ + /* Return total size of attribute. */ len = stream_get_putp (s) - cp - 2; stream_putw_at (s, cp, len); |