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/*
* Static NHT code.
* Copyright (C) 2018 Cumulus Networks, Inc.
* Donald Sharp
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "prefix.h"
#include "table.h"
#include "vrf.h"
#include "nexthop.h"
#include "static_vrf.h"
#include "static_routes.h"
#include "static_zebra.h"
#include "static_nht.h"
static void static_nht_update_safi(struct prefix *p, uint32_t nh_num,
afi_t afi, safi_t safi, struct vrf *vrf,
vrf_id_t nh_vrf_id)
{
struct route_table *stable;
struct static_route *si;
struct static_vrf *svrf;
struct route_node *rn;
bool orig;
bool reinstall;
svrf = vrf->info;
if (!svrf)
return;
stable = static_vrf_static_table(afi, safi, svrf);
if (!stable)
return;
for (rn = route_top(stable); rn; rn = route_next(rn)) {
reinstall = false;
for (si = rn->info; si; si = si->next) {
if (si->nh_vrf_id != nh_vrf_id)
continue;
if (si->type != STATIC_IPV4_GATEWAY
&& si->type != STATIC_IPV4_GATEWAY_IFNAME
&& si->type != STATIC_IPV6_GATEWAY
&& si->type != STATIC_IPV6_GATEWAY_IFNAME)
continue;
orig = si->nh_valid;
if (p->family == AF_INET
&& p->u.prefix4.s_addr == si->addr.ipv4.s_addr)
si->nh_valid = !!nh_num;
if (p->family == AF_INET6
&& memcmp(&p->u.prefix6, &si->addr.ipv6, 16) == 0)
si->nh_valid = !!nh_num;
if (orig != si->nh_valid)
reinstall = true;
if (reinstall) {
static_zebra_route_add(rn, si, vrf->vrf_id,
safi, true);
reinstall = false;
}
}
}
}
void static_nht_update(struct prefix *p, uint32_t nh_num, afi_t afi,
vrf_id_t nh_vrf_id)
{
struct vrf *vrf;
RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
static_nht_update_safi(p, nh_num, afi, SAFI_UNICAST,
vrf, nh_vrf_id);
static_nht_update_safi(p, nh_num, afi, SAFI_MULTICAST,
vrf, nh_vrf_id);
}
}
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