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/*
* VRRP Zebra interfacing.
* Copyright (C) 2018-2019 Cumulus Networks, Inc.
* Quentin Young
*
* 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 "lib/if.h"
#include "lib/linklist.h"
#include "lib/log.h"
#include "lib/prefix.h"
#include "lib/vty.h"
#include "lib/zclient.h"
#include "vrrp.h"
#include "vrrp_debug.h"
#include "vrrp_zebra.h"
#define VRRP_LOGPFX "[ZEBRA] "
static struct zclient *zclient;
static void vrrp_zebra_debug_if_state(struct interface *ifp, vrf_id_t vrf_id,
const char *func)
{
DEBUGD(&vrrp_dbg_zebra,
"%s: %s index %d(%u) parent %d mac %02x:%02x:%02x:%02x:%02x:%02x flags %ld metric %d mtu %d operative %d",
func, ifp->name, vrf_id, ifp->link_ifindex, ifp->ifindex,
ifp->hw_addr[0], ifp->hw_addr[1], ifp->hw_addr[2],
ifp->hw_addr[3], ifp->hw_addr[4], ifp->hw_addr[5],
(long)ifp->flags, ifp->metric, ifp->mtu, if_is_operative(ifp));
}
static void vrrp_zebra_debug_if_dump_address(struct interface *ifp,
const char *func)
{
struct connected *ifc;
struct listnode *node;
DEBUGD(&vrrp_dbg_zebra, "%s: interface %s addresses:", func, ifp->name);
for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
struct prefix *p = ifc->address;
DEBUGD(&vrrp_dbg_zebra, "%s: interface %s address %s %s", func,
ifp->name, inet_ntoa(p->u.prefix4),
CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) ? "secondary"
: "primary");
}
}
static void vrrp_zebra_connected(struct zclient *zclient)
{
zclient_send_reg_requests(zclient, VRF_DEFAULT);
}
/* Router-id update message from zebra. */
static int vrrp_router_id_update_zebra(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct prefix router_id;
zebra_router_id_update_read(zclient->ibuf, &router_id);
return 0;
}
int vrrp_ifp_create(struct interface *ifp)
{
vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__);
vrrp_if_add(ifp);
return 0;
}
int vrrp_ifp_destroy(struct interface *ifp)
{
vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__);
vrrp_if_del(ifp);
return 0;
}
int vrrp_ifp_up(struct interface *ifp)
{
vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__);
vrrp_if_up(ifp);
return 0;
}
int vrrp_ifp_down(struct interface *ifp)
{
vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__);
vrrp_if_down(ifp);
return 0;
}
static int vrrp_zebra_if_address_add(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct connected *c;
/*
* zebra api notifies address adds/dels events by using the same call
* interface_add_read below, see comments in lib/zclient.c
*
* zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, ...)
* will add address to interface list by calling
* connected_add_by_prefix()
*/
c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
if (!c)
return 0;
vrrp_zebra_debug_if_state(c->ifp, vrf_id, __func__);
vrrp_zebra_debug_if_dump_address(c->ifp, __func__);
vrrp_if_address_add(c->ifp);
return 0;
}
static int vrrp_zebra_if_address_del(int command, struct zclient *client,
zebra_size_t length, vrf_id_t vrf_id)
{
struct connected *c;
/*
* zebra api notifies address adds/dels events by using the same call
* interface_add_read below, see comments in lib/zclient.c
*
* zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, ...)
* will remove address from interface list by calling
* connected_delete_by_prefix()
*/
c = zebra_interface_address_read(command, client->ibuf, vrf_id);
if (!c)
return 0;
vrrp_zebra_debug_if_state(c->ifp, vrf_id, __func__);
vrrp_zebra_debug_if_dump_address(c->ifp, __func__);
vrrp_if_address_del(c->ifp);
return 0;
}
void vrrp_zebra_radv_set(struct vrrp_router *r, bool enable)
{
DEBUGD(&vrrp_dbg_zebra,
VRRP_LOGPFX VRRP_LOGPFX_VRID
"Requesting Zebra to turn router advertisements %s for %s",
r->vr->vrid, enable ? "on" : "off", r->mvl_ifp->name);
zclient_send_interface_radv_req(zclient, VRF_DEFAULT, r->mvl_ifp,
enable, VRRP_RADV_INT);
}
int vrrp_zclient_send_interface_protodown(struct interface *ifp, bool down)
{
DEBUGD(&vrrp_dbg_zebra,
VRRP_LOGPFX "Requesting Zebra to set %s protodown %s", ifp->name,
down ? "on" : "off");
return zclient_send_interface_protodown(zclient, VRF_DEFAULT, ifp,
down);
}
void vrrp_zebra_init(void)
{
if_zapi_callbacks(vrrp_ifp_create, vrrp_ifp_up,
vrrp_ifp_down, vrrp_ifp_destroy);
/* Socket for receiving updates from Zebra daemon */
zclient = zclient_new(master, &zclient_options_default);
zclient->zebra_connected = vrrp_zebra_connected;
zclient->router_id_update = vrrp_router_id_update_zebra;
zclient->interface_address_add = vrrp_zebra_if_address_add;
zclient->interface_address_delete = vrrp_zebra_if_address_del;
zclient_init(zclient, ZEBRA_ROUTE_VRRP, 0, &vrrp_privs);
zlog_notice("%s: zclient socket initialized", __PRETTY_FUNCTION__);
}
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