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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* VRRP Zebra interfacing.
* Copyright (C) 2018-2019 Cumulus Networks, Inc.
* Quentin Young
*/
#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, const char *func)
{
DEBUGD(&vrrp_dbg_zebra,
"%s: %s index %d vrf %s(%u) parent %d mac %02x:%02x:%02x:%02x:%02x:%02x flags %ld metric %d mtu %d operative %d",
func, ifp->name, ifp->ifindex, ifp->vrf->name, ifp->vrf->vrf_id,
ifp->link_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;
DEBUGD(&vrrp_dbg_zebra, "%s: interface %s addresses:", func, ifp->name);
frr_each (if_connected, ifp->connected, ifc) {
struct prefix *p = ifc->address;
DEBUGD(&vrrp_dbg_zebra, "%s: interface %s address %pFX %s",
func, ifp->name, p,
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, __func__);
vrrp_if_add(ifp);
return 0;
}
int vrrp_ifp_destroy(struct interface *ifp)
{
vrrp_zebra_debug_if_state(ifp, __func__);
vrrp_if_del(ifp);
return 0;
}
int vrrp_ifp_up(struct interface *ifp)
{
vrrp_zebra_debug_if_state(ifp, __func__);
vrrp_if_up(ifp);
return 0;
}
int vrrp_ifp_down(struct interface *ifp)
{
vrrp_zebra_debug_if_state(ifp, __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, __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, __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, r->mvl_ifp->vrf->vrf_id,
r->mvl_ifp, enable, VRRP_RADV_INT);
}
void 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");
zclient_send_interface_protodown(zclient, ifp->vrf->vrf_id, ifp, down);
}
static zclient_handler *const vrrp_handlers[] = {
[ZEBRA_ROUTER_ID_UPDATE] = vrrp_router_id_update_zebra,
[ZEBRA_INTERFACE_ADDRESS_ADD] = vrrp_zebra_if_address_add,
[ZEBRA_INTERFACE_ADDRESS_DELETE] = vrrp_zebra_if_address_del,
};
void vrrp_zebra_init(void)
{
hook_register_prio(if_real, 0, vrrp_ifp_create);
hook_register_prio(if_up, 0, vrrp_ifp_up);
hook_register_prio(if_down, 0, vrrp_ifp_down);
hook_register_prio(if_unreal, 0, vrrp_ifp_destroy);
/* Socket for receiving updates from Zebra daemon */
zclient = zclient_new(master, &zclient_options_default, vrrp_handlers,
array_size(vrrp_handlers));
zclient->zebra_connected = vrrp_zebra_connected;
zclient_init(zclient, ZEBRA_ROUTE_VRRP, 0, &vrrp_privs);
zlog_notice("%s: zclient socket initialized", __func__);
}
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