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/* RIPd and zebra interface.
* Copyright (C) 1997, 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
*
* This file is part of GNU Zebra.
*
* GNU Zebra 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, or (at your option) any
* later version.
*
* GNU Zebra 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 "command.h"
#include "prefix.h"
#include "table.h"
#include "stream.h"
#include "memory.h"
#include "zclient.h"
#include "log.h"
#include "vrf.h"
#include "ripd/ripd.h"
#include "ripd/rip_debug.h"
#include "ripd/rip_interface.h"
/* All information about zebra. */
struct zclient *zclient = NULL;
/* Send ECMP routes to zebra. */
static void rip_zebra_ipv4_send(struct route_node *rp, uint8_t cmd)
{
struct list *list = (struct list *)rp->info;
struct zapi_route api;
struct zapi_nexthop *api_nh;
struct listnode *listnode = NULL;
struct rip_info *rinfo = NULL;
int count = 0;
memset(&api, 0, sizeof(api));
api.vrf_id = VRF_DEFAULT;
api.type = ZEBRA_ROUTE_RIP;
api.safi = SAFI_UNICAST;
SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) {
if (count >= MULTIPATH_NUM)
break;
api_nh = &api.nexthops[count];
api_nh->vrf_id = VRF_DEFAULT;
api_nh->gate = rinfo->nh.gate;
api_nh->type = NEXTHOP_TYPE_IPV4;
if (cmd == ZEBRA_ROUTE_ADD)
SET_FLAG(rinfo->flags, RIP_RTF_FIB);
else
UNSET_FLAG(rinfo->flags, RIP_RTF_FIB);
count++;
}
api.prefix = rp->p;
api.nexthop_num = count;
rinfo = listgetdata(listhead(list));
SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
api.metric = rinfo->metric;
if (rinfo->distance && rinfo->distance != ZEBRA_RIP_DISTANCE_DEFAULT) {
SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
api.distance = rinfo->distance;
}
if (rinfo->tag) {
SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
api.tag = rinfo->tag;
}
zclient_route_send(cmd, zclient, &api);
if (IS_RIP_DEBUG_ZEBRA) {
if (rip->ecmp)
zlog_debug("%s: %s/%d nexthops %d",
(cmd == ZEBRA_ROUTE_ADD)
? "Install into zebra"
: "Delete from zebra",
inet_ntoa(rp->p.u.prefix4), rp->p.prefixlen,
count);
else
zlog_debug("%s: %s/%d",
(cmd == ZEBRA_ROUTE_ADD)
? "Install into zebra"
: "Delete from zebra",
inet_ntoa(rp->p.u.prefix4), rp->p.prefixlen);
}
rip_global_route_changes++;
}
/* Add/update ECMP routes to zebra. */
void rip_zebra_ipv4_add(struct route_node *rp)
{
rip_zebra_ipv4_send(rp, ZEBRA_ROUTE_ADD);
}
/* Delete ECMP routes from zebra. */
void rip_zebra_ipv4_delete(struct route_node *rp)
{
rip_zebra_ipv4_send(rp, ZEBRA_ROUTE_DELETE);
}
/* Zebra route add and delete treatment. */
static int rip_zebra_read_route(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct zapi_route api;
struct nexthop nh;
if (!rip)
return 0;
if (zapi_route_decode(zclient->ibuf, &api) < 0)
return -1;
memset(&nh, 0, sizeof(nh));
nh.type = api.nexthops[0].type;
nh.gate.ipv4 = api.nexthops[0].gate.ipv4;
nh.ifindex = api.nexthops[0].ifindex;
/* Then fetch IPv4 prefixes. */
if (command == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
rip_redistribute_add(api.type, RIP_ROUTE_REDISTRIBUTE,
(struct prefix_ipv4 *)&api.prefix, &nh,
api.metric, api.distance, api.tag);
else if (command == ZEBRA_REDISTRIBUTE_ROUTE_DEL)
rip_redistribute_delete(api.type, RIP_ROUTE_REDISTRIBUTE,
(struct prefix_ipv4 *)&api.prefix,
nh.ifindex);
return 0;
}
void rip_zclient_reset(void)
{
zclient_reset(zclient);
}
void rip_redistribute_conf_update(int type)
{
zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, type,
0, VRF_DEFAULT);
}
void rip_redistribute_conf_delete(int type)
{
if (zclient->sock > 0)
zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
AFI_IP, type, 0, VRF_DEFAULT);
/* Remove the routes from RIP table. */
rip_redistribute_withdraw(type);
}
int rip_redistribute_check(int type)
{
return vrf_bitmap_check(zclient->redist[AFI_IP][type], VRF_DEFAULT);
}
void rip_redistribute_clean(void)
{
for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) {
if (!vrf_bitmap_check(zclient->redist[AFI_IP][i], VRF_DEFAULT))
continue;
if (zclient->sock > 0)
zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE,
zclient, AFI_IP, i, 0,
VRF_DEFAULT);
vrf_bitmap_unset(zclient->redist[AFI_IP][i], VRF_DEFAULT);
/* Remove the routes from RIP table. */
rip_redistribute_withdraw(i);
}
}
void rip_show_redistribute_config(struct vty *vty)
{
for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) {
if (i == zclient->redist_default
|| !vrf_bitmap_check(zclient->redist[AFI_IP][i],
VRF_DEFAULT))
continue;
vty_out(vty, " %s", zebra_route_string(i));
}
}
static void rip_zebra_connected(struct zclient *zclient)
{
zclient_send_reg_requests(zclient, VRF_DEFAULT);
}
void rip_zclient_init(struct thread_master *master)
{
/* Set default value to the zebra client structure. */
zclient = zclient_new_notify(master, &zclient_options_default);
zclient_init(zclient, ZEBRA_ROUTE_RIP, 0, &ripd_privs);
zclient->zebra_connected = rip_zebra_connected;
zclient->interface_add = rip_interface_add;
zclient->interface_delete = rip_interface_delete;
zclient->interface_address_add = rip_interface_address_add;
zclient->interface_address_delete = rip_interface_address_delete;
zclient->interface_up = rip_interface_up;
zclient->interface_down = rip_interface_down;
zclient->redistribute_route_add = rip_zebra_read_route;
zclient->redistribute_route_del = rip_zebra_read_route;
}
void rip_zclient_stop(void)
{
zclient_stop(zclient);
zclient_free(zclient);
}
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