#include "bgpd/bgp_advertise.h"
#include "bgpd/bgp_zebra.h"
#include "bgpd/bgp_vty.h"
+#include "bgpd/bgp_mpath.h"
/* Extern from bgp_dump.c */
extern const char *bgp_origin_str[];
bgp_attr_unintern (&binfo->attr);
bgp_info_extra_free (&binfo->extra);
+ bgp_info_mpath_free (&binfo->mpath);
peer_unlock (binfo->peer); /* bgp_info peer reference */
else
rn->info = ri->next;
+ bgp_info_mpath_dequeue (ri);
bgp_info_unlock (ri);
bgp_unlock_node (rn);
}
/* Compare two bgp route entity. br is preferable then return 1. */
static int
-bgp_info_cmp (struct bgp *bgp, struct bgp_info *new, struct bgp_info *exist)
+bgp_info_cmp (struct bgp *bgp, struct bgp_info *new, struct bgp_info *exist,
+ int *paths_eq)
{
u_int32_t new_pref;
u_int32_t exist_pref;
int internal_as_route = 0;
int confed_as_route = 0;
int ret;
+ uint32_t newm, existm;
+
+ *paths_eq = 0;
/* 0. Null check. */
if (new == NULL)
return 0;
/* 8. IGP metric check. */
- if (new->extra || exist->extra)
- {
- uint32_t newm = (new->extra ? new->extra->igpmetric : 0);
- uint32_t existm = (exist->extra ? exist->extra->igpmetric : 0);
-
- if (newm < existm)
- return 1;
- if (newm > existm)
- return 0;
- }
+ newm = (new->extra ? new->extra->igpmetric : 0);
+ existm = (exist->extra ? exist->extra->igpmetric : 0);
+ if (newm < existm)
+ ret = 1;
+ if (newm > existm)
+ ret = 0;
/* 9. Maximum path check. */
+ if (newm == existm)
+ {
+ if ((peer_sort (new->peer) == BGP_PEER_IBGP))
+ {
+ if (aspath_cmp (new->attr->aspath, exist->attr->aspath))
+ *paths_eq = 1;
+ }
+ else if (new->peer->as == exist->peer->as)
+ *paths_eq = 1;
+ }
+ else
+ {
+ /*
+ * TODO: If unequal cost ibgp multipath is enabled we can
+ * mark the paths as equal here instead of returning
+ */
+ return ret;
+ }
/* 10. If both paths are external, prefer the path that was received
first (the oldest one). This step minimizes route-flap, since a
struct bgp *bgp;
int transparent;
int reflect;
+ struct attr *riattr;
from = ri->peer;
filter = &peer->filter[afi][safi];
bgp = peer->bgp;
+ riattr = bgp_info_mpath_count (ri) ? bgp_info_mpath_attr (ri) : ri->attr;
if (DISABLE_BGP_ANNOUNCE)
return 0;
/* If peer's id and route's nexthop are same. draft-ietf-idr-bgp4-23 5.1.3 */
if (p->family == AF_INET
- && IPV4_ADDR_SAME(&peer->remote_id, &ri->attr->nexthop))
+ && IPV4_ADDR_SAME(&peer->remote_id, &riattr->nexthop))
return 0;
#ifdef HAVE_IPV6
if (p->family == AF_INET6
- && IPV6_ADDR_SAME(&peer->remote_id, &ri->attr->nexthop))
+ && IPV6_ADDR_SAME(&peer->remote_id, &riattr->nexthop))
return 0;
#endif
transparent = 0;
/* If community is not disabled check the no-export and local. */
- if (! transparent && bgp_community_filter (peer, ri->attr))
+ if (! transparent && bgp_community_filter (peer, riattr))
return 0;
/* If the attribute has originator-id and it is same as remote
peer's id. */
- if (ri->attr->flag & ATTR_FLAG_BIT (BGP_ATTR_ORIGINATOR_ID))
+ if (riattr->flag & ATTR_FLAG_BIT (BGP_ATTR_ORIGINATOR_ID))
{
- if (IPV4_ADDR_SAME (&peer->remote_id, &ri->attr->extra->originator_id))
+ if (IPV4_ADDR_SAME (&peer->remote_id, &riattr->extra->originator_id))
{
if (BGP_DEBUG (filter, FILTER))
zlog (peer->log, LOG_DEBUG,
}
/* Output filter check. */
- if (bgp_output_filter (peer, p, ri->attr, afi, safi) == FILTER_DENY)
+ if (bgp_output_filter (peer, p, riattr, afi, safi) == FILTER_DENY)
{
if (BGP_DEBUG (filter, FILTER))
zlog (peer->log, LOG_DEBUG,
#ifdef BGP_SEND_ASPATH_CHECK
/* AS path loop check. */
- if (aspath_loop_check (ri->attr->aspath, peer->as))
+ if (aspath_loop_check (riattr->aspath, peer->as))
{
if (BGP_DEBUG (filter, FILTER))
zlog (peer->log, LOG_DEBUG,
/* If we're a CONFED we need to loop check the CONFED ID too */
if (CHECK_FLAG(bgp->config, BGP_CONFIG_CONFEDERATION))
{
- if (aspath_loop_check(ri->attr->aspath, bgp->confed_id))
+ if (aspath_loop_check(riattr->aspath, bgp->confed_id))
{
if (BGP_DEBUG (filter, FILTER))
zlog (peer->log, LOG_DEBUG,
}
/* For modify attribute, copy it to temporary structure. */
- bgp_attr_dup (attr, ri->attr);
+ bgp_attr_dup (attr, riattr);
/* If local-preference is not set. */
if ((peer_sort (peer) == BGP_PEER_IBGP
struct bgp_filter *filter;
struct bgp_info info;
struct peer *from;
- struct bgp *bgp;
+ struct attr *riattr;
from = ri->peer;
filter = &rsclient->filter[afi][safi];
- bgp = rsclient->bgp;
+ riattr = bgp_info_mpath_count (ri) ? bgp_info_mpath_attr (ri) : ri->attr;
if (DISABLE_BGP_ANNOUNCE)
return 0;
/* If the attribute has originator-id and it is same as remote
peer's id. */
- if (ri->attr->flag & ATTR_FLAG_BIT (BGP_ATTR_ORIGINATOR_ID))
+ if (riattr->flag & ATTR_FLAG_BIT (BGP_ATTR_ORIGINATOR_ID))
{
if (IPV4_ADDR_SAME (&rsclient->remote_id,
- &ri->attr->extra->originator_id))
+ &riattr->extra->originator_id))
{
if (BGP_DEBUG (filter, FILTER))
zlog (rsclient->log, LOG_DEBUG,
}
/* Output filter check. */
- if (bgp_output_filter (rsclient, p, ri->attr, afi, safi) == FILTER_DENY)
+ if (bgp_output_filter (rsclient, p, riattr, afi, safi) == FILTER_DENY)
{
if (BGP_DEBUG (filter, FILTER))
zlog (rsclient->log, LOG_DEBUG,
#ifdef BGP_SEND_ASPATH_CHECK
/* AS path loop check. */
- if (aspath_loop_check (ri->attr->aspath, rsclient->as))
+ if (aspath_loop_check (riattr->aspath, rsclient->as))
{
if (BGP_DEBUG (filter, FILTER))
zlog (rsclient->log, LOG_DEBUG,
#endif /* BGP_SEND_ASPATH_CHECK */
/* For modify attribute, copy it to temporary structure. */
- bgp_attr_dup (attr, ri->attr);
+ bgp_attr_dup (attr, riattr);
/* next-hop-set */
if ((p->family == AF_INET && attr->nexthop.s_addr == 0)
};
static void
-bgp_best_selection (struct bgp *bgp, struct bgp_node *rn, struct bgp_info_pair *result)
+bgp_best_selection (struct bgp *bgp, struct bgp_node *rn,
+ struct bgp_maxpaths_cfg *mpath_cfg,
+ struct bgp_info_pair *result)
{
struct bgp_info *new_select;
struct bgp_info *old_select;
struct bgp_info *ri1;
struct bgp_info *ri2;
struct bgp_info *nextri = NULL;
-
+ int paths_eq, do_mpath;
+ struct list mp_list;
+
+ bgp_mp_list_init (&mp_list);
+ do_mpath = (mpath_cfg->maxpaths_ebgp != BGP_DEFAULT_MAXPATHS ||
+ mpath_cfg->maxpaths_ibgp != BGP_DEFAULT_MAXPATHS);
+
/* bgp deterministic-med */
new_select = NULL;
if (bgp_flag_check (bgp, BGP_FLAG_DETERMINISTIC_MED))
continue;
new_select = ri1;
+ if (do_mpath)
+ bgp_mp_list_add (&mp_list, ri1);
+ old_select = CHECK_FLAG (ri1->flags, BGP_INFO_SELECTED) ? ri1 : NULL;
if (ri1->next)
for (ri2 = ri1->next; ri2; ri2 = ri2->next)
{
|| aspath_cmp_left_confed (ri1->attr->aspath,
ri2->attr->aspath))
{
- if (bgp_info_cmp (bgp, ri2, new_select))
+ if (CHECK_FLAG (ri2->flags, BGP_INFO_SELECTED))
+ old_select = ri2;
+ if (bgp_info_cmp (bgp, ri2, new_select, &paths_eq))
{
bgp_info_unset_flag (rn, new_select, BGP_INFO_DMED_SELECTED);
new_select = ri2;
+ if (do_mpath && !paths_eq)
+ {
+ bgp_mp_list_clear (&mp_list);
+ bgp_mp_list_add (&mp_list, ri2);
+ }
}
+ if (do_mpath && paths_eq)
+ bgp_mp_list_add (&mp_list, ri2);
+
bgp_info_set_flag (rn, ri2, BGP_INFO_DMED_CHECK);
}
}
bgp_info_set_flag (rn, new_select, BGP_INFO_DMED_CHECK);
bgp_info_set_flag (rn, new_select, BGP_INFO_DMED_SELECTED);
+
+ bgp_info_mpath_update (rn, new_select, old_select, &mp_list, mpath_cfg);
+ bgp_mp_list_clear (&mp_list);
}
/* Check old selected route and new selected route. */
bgp_info_unset_flag (rn, ri, BGP_INFO_DMED_CHECK);
bgp_info_unset_flag (rn, ri, BGP_INFO_DMED_SELECTED);
- if (bgp_info_cmp (bgp, ri, new_select))
- new_select = ri;
+ if (bgp_info_cmp (bgp, ri, new_select, &paths_eq))
+ {
+ if (do_mpath && bgp_flag_check (bgp, BGP_FLAG_DETERMINISTIC_MED))
+ bgp_mp_dmed_deselect (new_select);
+
+ new_select = ri;
+
+ if (do_mpath && !paths_eq)
+ {
+ bgp_mp_list_clear (&mp_list);
+ bgp_mp_list_add (&mp_list, ri);
+ }
+ }
+ else if (do_mpath && bgp_flag_check (bgp, BGP_FLAG_DETERMINISTIC_MED))
+ bgp_mp_dmed_deselect (ri);
+
+ if (do_mpath && paths_eq)
+ bgp_mp_list_add (&mp_list, ri);
}
- result->old = old_select;
- result->new = new_select;
- return;
+ if (!bgp_flag_check (bgp, BGP_FLAG_DETERMINISTIC_MED))
+ bgp_info_mpath_update (rn, new_select, old_select, &mp_list, mpath_cfg);
+
+ bgp_info_mpath_aggregate_update (new_select, old_select);
+ bgp_mp_list_clear (&mp_list);
+
+ result->old = old_select;
+ result->new = new_select;
+
+ return;
}
static int
struct peer *rsclient = rn->table->owner;
/* Best path selection. */
- bgp_best_selection (bgp, rn, &old_and_new);
+ bgp_best_selection (bgp, rn, &bgp->maxpaths[afi][safi], &old_and_new);
new_select = old_and_new.new;
old_select = old_and_new.old;
{
bgp_info_set_flag (rn, new_select, BGP_INFO_SELECTED);
bgp_info_unset_flag (rn, new_select, BGP_INFO_ATTR_CHANGED);
- }
+ UNSET_FLAG (new_select->flags, BGP_INFO_MULTIPATH_CHG);
+ }
bgp_process_announce_selected (rsclient, new_select, rn,
afi, safi);
{
bgp_info_set_flag (rn, new_select, BGP_INFO_SELECTED);
bgp_info_unset_flag (rn, new_select, BGP_INFO_ATTR_CHANGED);
+ UNSET_FLAG (new_select->flags, BGP_INFO_MULTIPATH_CHG);
}
bgp_process_announce_selected (rsclient, new_select, rn, afi, safi);
}
struct peer *peer;
/* Best path selection. */
- bgp_best_selection (bgp, rn, &old_and_new);
+ bgp_best_selection (bgp, rn, &bgp->maxpaths[afi][safi], &old_and_new);
old_select = old_and_new.old;
new_select = old_and_new.new;
{
if (! CHECK_FLAG (old_select->flags, BGP_INFO_ATTR_CHANGED))
{
- if (CHECK_FLAG (old_select->flags, BGP_INFO_IGP_CHANGED))
- bgp_zebra_announce (p, old_select, bgp);
+ if (CHECK_FLAG (old_select->flags, BGP_INFO_IGP_CHANGED) ||
+ CHECK_FLAG (old_select->flags, BGP_INFO_MULTIPATH_CHG))
+ bgp_zebra_announce (p, old_select, bgp, safi);
+ UNSET_FLAG (old_select->flags, BGP_INFO_MULTIPATH_CHG);
UNSET_FLAG (rn->flags, BGP_NODE_PROCESS_SCHEDULED);
return WQ_SUCCESS;
}
{
bgp_info_set_flag (rn, new_select, BGP_INFO_SELECTED);
bgp_info_unset_flag (rn, new_select, BGP_INFO_ATTR_CHANGED);
+ UNSET_FLAG (new_select->flags, BGP_INFO_MULTIPATH_CHG);
}
}
/* FIB update. */
- if (safi == SAFI_UNICAST && ! bgp->name &&
- ! bgp_option_check (BGP_OPT_NO_FIB))
+ if ((safi == SAFI_UNICAST || safi == SAFI_MULTICAST) && (! bgp->name &&
+ ! bgp_option_check (BGP_OPT_NO_FIB)))
{
if (new_select
&& new_select->type == ZEBRA_ROUTE_BGP
&& new_select->sub_type == BGP_ROUTE_NORMAL)
- bgp_zebra_announce (p, new_select, bgp);
+ bgp_zebra_announce (p, new_select, bgp, safi);
else
{
/* Withdraw the route from the kernel. */
if (old_select
&& old_select->type == ZEBRA_ROUTE_BGP
&& old_select->sub_type == BGP_ROUTE_NORMAL)
- bgp_zebra_withdraw (p, old_select);
+ bgp_zebra_withdraw (p, old_select, safi);
}
}
u_int8_t ndata[7];
if (safi == SAFI_MPLS_VPN)
- safi = BGP_SAFI_VPNV4;
+ safi = SAFI_MPLS_LABELED_VPN;
ndata[0] = (afi >> 8);
ndata[1] = afi;
bgp_attr_unintern (&attr_new2);
/* IPv4 unicast next hop check. */
- if (afi == AFI_IP && safi == SAFI_UNICAST)
+ if ((afi == AFI_IP) && ((safi == SAFI_UNICAST) || safi == SAFI_MULTICAST))
{
- /* Next hop must not be 0.0.0.0 nor Class E address. */
+ /* Next hop must not be 0.0.0.0 nor Class D/E address. */
if (new_attr.nexthop.s_addr == 0
- || ntohl (new_attr.nexthop.s_addr) >= 0xe0000000)
+ || IPV4_CLASS_DE (ntohl (new_attr.nexthop.s_addr)))
{
bgp_attr_unintern (&attr_new);
/* If the peer is EBGP and nexthop is not on connected route,
discard it. */
if (peer_sort (peer) == BGP_PEER_EBGP && peer->ttl == 1
- && ! bgp_nexthop_check_ebgp (afi, &new_attr)
+ && ! bgp_nexthop_onlink (afi, &new_attr)
&& ! CHECK_FLAG (peer->flags, PEER_FLAG_DISABLE_CONNECTED_CHECK))
{
reason = "non-connected next-hop;";
goto filtered;
}
- /* Next hop must not be 0.0.0.0 nor Class E address. Next hop
+ /* Next hop must not be 0.0.0.0 nor Class D/E address. Next hop
must not be my own address. */
if (bgp_nexthop_self (afi, &new_attr)
|| new_attr.nexthop.s_addr == 0
- || ntohl (new_attr.nexthop.s_addr) >= 0xe0000000)
+ || IPV4_CLASS_DE (ntohl (new_attr.nexthop.s_addr)))
{
reason = "martian next-hop;";
goto filtered;
if (CHECK_FLAG (ri->flags, BGP_INFO_SELECTED)
&& ri->type == ZEBRA_ROUTE_BGP
&& ri->sub_type == BGP_ROUTE_NORMAL)
- bgp_zebra_withdraw (&rn->p, ri);
+ bgp_zebra_withdraw (&rn->p, ri,SAFI_UNICAST);
table = bgp->rib[AFI_IP6][SAFI_UNICAST];
if (CHECK_FLAG (ri->flags, BGP_INFO_SELECTED)
&& ri->type == ZEBRA_ROUTE_BGP
&& ri->sub_type == BGP_ROUTE_NORMAL)
- bgp_zebra_withdraw (&rn->p, ri);
+ bgp_zebra_withdraw (&rn->p, ri,SAFI_UNICAST);
}
}
"Specify a network to announce via BGP\n"
"IPv6 prefix <network>/<length>\n")
{
- return bgp_static_set (vty, vty->index, argv[0], AFI_IP6, SAFI_UNICAST,
+ return bgp_static_set (vty, vty->index, argv[0], AFI_IP6, bgp_node_safi(vty),
NULL, 0);
}
"Specify a network to announce via BGP\n"
"IPv6 prefix <network>/<length>\n")
{
- return bgp_static_unset (vty, vty->index, argv[0], AFI_IP6, SAFI_UNICAST);
+ return bgp_static_unset (vty, vty->index, argv[0], AFI_IP6, bgp_node_safi(vty));
}
ALIAS (no_ipv6_bgp_network,
\f
/* Redistribute route treatment. */
void
-bgp_redistribute_add (struct prefix *p, struct in_addr *nexthop,
+bgp_redistribute_add (struct prefix *p, const struct in_addr *nexthop,
+ const struct in6_addr *nexthop6,
u_int32_t metric, u_char type)
{
struct bgp *bgp;
if (nexthop)
attr.nexthop = *nexthop;
+#ifdef HAVE_IPV6
+ if (nexthop6)
+ {
+ struct attr_extra *extra = bgp_attr_extra_get(&attr);
+ extra->mp_nexthop_global = *nexthop6;
+ extra->mp_nexthop_len = 16;
+ }
+#endif
+
attr.med = metric;
attr.flag |= ATTR_FLAG_BIT (BGP_ATTR_MULTI_EXIT_DISC);
if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_ATOMIC_AGGREGATE))
vty_out (vty, ", atomic-aggregate");
+ if (CHECK_FLAG (binfo->flags, BGP_INFO_MULTIPATH) ||
+ (CHECK_FLAG (binfo->flags, BGP_INFO_SELECTED) &&
+ bgp_info_mpath_count (binfo)))
+ vty_out (vty, ", multipath");
+
if (CHECK_FLAG (binfo->flags, BGP_INFO_SELECTED))
vty_out (vty, ", best");
safi = SAFI_MULTICAST;
else if (strncmp (safi_str, "u", 1) == 0)
safi = SAFI_UNICAST;
- else if (strncmp (safi_str, "vpnv4", 5) == 0)
- safi = BGP_SAFI_VPNV4;
- else if (strncmp (safi_str, "vpnv6", 5) == 0)
- safi = BGP_SAFI_VPNV6;
+ else if (strncmp (safi_str, "vpnv4", 5) == 0 || strncmp (safi_str, "vpnv6", 5) == 0)
+ safi = SAFI_MPLS_LABELED_VPN;
else
{
vty_out (vty, "%% Invalid subsequent address family %s%s",
return CMD_WARNING;
}
- if ((afi == AFI_IP && safi == BGP_SAFI_VPNV6)
- || (afi == AFI_IP6 && safi == BGP_SAFI_VPNV4))
- {
- vty_out (vty, "%% Invalid subsequent address family %s for %s%s",
- afi_str, safi_str, VTY_NEWLINE);
- return CMD_WARNING;
- }
return bgp_table_stats (vty, bgp, afi, safi);
}
install_element (BGP_IPV6_NODE, &no_ipv6_aggregate_address_cmd);
install_element (BGP_IPV6_NODE, &no_ipv6_aggregate_address_summary_only_cmd);
+ install_element (BGP_IPV6M_NODE, &ipv6_bgp_network_cmd);
+ install_element (BGP_IPV6M_NODE, &no_ipv6_bgp_network_cmd);
+
/* Old config IPv6 BGP commands. */
install_element (BGP_NODE, &old_ipv6_bgp_network_cmd);
install_element (BGP_NODE, &old_no_ipv6_bgp_network_cmd);
projects / mirror_frr.git / blobdiff