static struct bgp_advertise_attr *
bgp_advertise_intern (struct hash *hash, struct attr *attr)
{
struct bgp_advertise_attr ref;
struct bgp_advertise_attr *baa;
ref.attr = bgp_attr_intern (attr);
baa = (struct bgp_advertise_attr *) hash_get (hash, &ref, baa_hash_alloc);
baa->refcnt++;
return baa;
}
void
bgp_adj_in_set (struct bgp_node *rn, struct peer *peer, struct attr *attr)
{
struct bgp_adj_in *adj;
for (adj = rn->adj_in; adj; adj = adj->next)
{
if (adj->peer == peer)
{
if (adj->attr != attr)
{
bgp_attr_unintern (adj->attr);
adj->attr = bgp_attr_intern (attr);
}
return;
}
}
adj = XCALLOC (MTYPE_BGP_ADJ_IN, sizeof (struct bgp_adj_in));
adj->peer = peer_lock (peer); /* adj_in peer reference */
adj->attr = bgp_attr_intern (attr);
BGP_ADJ_IN_ADD (rn, adj);
bgp_lock_node (rn);
}
/*******************************************************************************
函数名称 : bgp_info_mpath_aggregate_update
功能描述 : mpath聚合路由更新
输入参数 :
输出参数 :
返 回 值 : 无
--------------------------------------------------------------------------------
最近一次修改记录 :
修改作者 :
修改目的 : 新添加函数
修改日期 : 2012-8-15
*******************************************************************************/
void bgp_info_mpath_aggregate_update (struct bgp_info *new_best, struct bgp_info *old_best)
{
struct bgp_info *mpinfo;
struct aspath *aspath;
struct aspath *asmerge;
struct attr *new_attr, *old_attr;
u8 origin, attr_chg;
struct community *community, *commerge;
struct ecommunity *ecomm, *ecommerge;
struct attr_extra *ae;
struct attr attr = { 0 };
if (old_best && (old_best != new_best) &&
(old_attr = bgp_info_mpath_attr (old_best)))
{
bgp_attr_unintern (&old_attr);
bgp_info_mpath_attr_set (old_best, NULL);
}
if (!new_best)
{
return;
}
if (!bgp_info_mpath_count (new_best))
{
if ((new_attr = bgp_info_mpath_attr (new_best)))
{
bgp_attr_unintern (&new_attr);
bgp_info_mpath_attr_set (new_best, NULL);
SET_FLAG (new_best->flags, BGP_INFO_ATTR_CHANGED);
}
return;
}
if (!CHECK_FLAG (new_best->flags, BGP_INFO_MULTIPATH_CHG) &&
(old_best == new_best))
{
attr_chg = 0;
if (CHECK_FLAG (new_best->flags, BGP_INFO_ATTR_CHANGED))
{
attr_chg = 1;
}
else
{
for (mpinfo = bgp_info_mpath_first (new_best); mpinfo;
mpinfo = bgp_info_mpath_next (mpinfo))
{
if (CHECK_FLAG (mpinfo->flags, BGP_INFO_ATTR_CHANGED))
{
attr_chg = 1;
break;
}
}
}
if (!attr_chg)
{
return;
}
}
bgp_attr_dup (&attr, new_best->attr);
/* aggregate attribute from multipath constituents */
aspath = aspath_dup (attr.aspath);
origin = attr.origin;
community = attr.community ? community_dup (attr.community) : NULL;
ae = attr.extra;
ecomm = (ae && ae->ecommunity) ? ecommunity_dup (ae->ecommunity) : NULL;
for (mpinfo = bgp_info_mpath_first (new_best); mpinfo;
mpinfo = bgp_info_mpath_next (mpinfo))
{
asmerge = aspath_aggregate (aspath, mpinfo->attr->aspath);
aspath_free (aspath);
aspath = asmerge;
if (origin < mpinfo->attr->origin)
{
origin = mpinfo->attr->origin;
}
if (mpinfo->attr->community)
{
if (community)
{
commerge = community_merge (community, mpinfo->attr->community);
community = community_uniq_sort (commerge);
community_free (&commerge);
}
else
{
community = community_dup (mpinfo->attr->community);
}
}
ae = mpinfo->attr->extra;
if (ae && ae->ecommunity)
{
if (ecomm)
{
ecommerge = ecommunity_merge (ecomm, ae->ecommunity);
ecomm = ecommunity_uniq_sort (ecommerge);
ecommunity_free (ecommerge);
}
else
{
ecomm = ecommunity_dup (ae->ecommunity);
}
}
}
attr.aspath = aspath;
attr.origin = origin;
if (community)
{
attr.community = community;
attr.flag |= ATTR_FLAG_BIT (BGP_ATTR_COMMUNITIES);
}
if (ecomm)
{
ae = bgp_attr_extra_get (&attr);
ae->ecommunity = ecomm;
attr.flag |= ATTR_FLAG_BIT (BGP_ATTR_EXT_COMMUNITIES);
}
/* Zap multipath attr nexthop so we set nexthop to self */
attr.nexthop.s_addr = 0;
#ifdef HAVE_IPV6
if (attr.extra)
{
memset (&attr.extra->mp_nexthop_global, 0, sizeof (struct in6_addr));
}
#endif /* HAVE_IPV6 */
new_attr = bgp_attr_intern (&attr);
bgp_attr_extra_free (&attr);
if (new_attr != bgp_info_mpath_attr (new_best))
{
if ((old_attr = bgp_info_mpath_attr (new_best)))
{
bgp_attr_unintern (&old_attr);
}
bgp_info_mpath_attr_set (new_best, new_attr);
SET_FLAG (new_best->flags, BGP_INFO_ATTR_CHANGED);
}
else
{
bgp_attr_unintern (&new_attr);
}
}
