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|
/*
* Zebra connect library for EIGRP.
* Copyright (C) 2013-2014
* Authors:
* Donnie Savage
* Jan Janovic
* Matej Perina
* Peter Orsag
* Peter Paluch
*
* 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 "thread.h"
#include "command.h"
#include "network.h"
#include "prefix.h"
#include "routemap.h"
#include "table.h"
#include "stream.h"
#include "memory.h"
#include "zclient.h"
#include "filter.h"
#include "plist.h"
#include "log.h"
#include "nexthop.h"
#include "eigrpd/eigrp_structs.h"
#include "eigrpd/eigrpd.h"
#include "eigrpd/eigrp_interface.h"
#include "eigrpd/eigrp_neighbor.h"
#include "eigrpd/eigrp_packet.h"
#include "eigrpd/eigrp_zebra.h"
#include "eigrpd/eigrp_vty.h"
#include "eigrpd/eigrp_dump.h"
#include "eigrpd/eigrp_network.h"
#include "eigrpd/eigrp_topology.h"
#include "eigrpd/eigrp_fsm.h"
static int eigrp_interface_add(int, struct zclient *, zebra_size_t, vrf_id_t);
static int eigrp_interface_delete(int, struct zclient *, zebra_size_t,
vrf_id_t);
static int eigrp_interface_address_add(int, struct zclient *, zebra_size_t,
vrf_id_t vrf_id);
static int eigrp_interface_address_delete(int, struct zclient *, zebra_size_t,
vrf_id_t vrf_id);
static int eigrp_interface_state_up(int, struct zclient *, zebra_size_t,
vrf_id_t vrf_id);
static int eigrp_interface_state_down(int, struct zclient *, zebra_size_t,
vrf_id_t vrf_id);
static struct interface *zebra_interface_if_lookup(struct stream *);
static int eigrp_zebra_read_route(int, struct zclient *, zebra_size_t,
vrf_id_t vrf_id);
/* Zebra structure to hold current status. */
struct zclient *zclient = NULL;
/* For registering threads. */
extern struct thread_master *master;
struct in_addr router_id_zebra;
/* Router-id update message from zebra. */
static int eigrp_router_id_update_zebra(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct eigrp *eigrp;
struct prefix router_id;
zebra_router_id_update_read(zclient->ibuf, &router_id);
router_id_zebra = router_id.u.prefix4;
eigrp = eigrp_lookup();
if (eigrp != NULL)
eigrp_router_id_update(eigrp);
return 0;
}
static int eigrp_zebra_notify_owner(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct prefix p;
enum zapi_route_notify_owner note;
if (!zapi_route_notify_decode(zclient->ibuf, &p, ¬e))
return -1;
return 0;
}
static void eigrp_zebra_connected(struct zclient *zclient)
{
zclient_send_reg_requests(zclient, VRF_DEFAULT);
}
void eigrp_zebra_init(void)
{
struct zclient_options opt = { .receive_notify = false };
zclient = zclient_new_notify(master, &opt);
zclient_init(zclient, ZEBRA_ROUTE_EIGRP, 0, &eigrpd_privs);
zclient->zebra_connected = eigrp_zebra_connected;
zclient->router_id_update = eigrp_router_id_update_zebra;
zclient->interface_add = eigrp_interface_add;
zclient->interface_delete = eigrp_interface_delete;
zclient->interface_up = eigrp_interface_state_up;
zclient->interface_down = eigrp_interface_state_down;
zclient->interface_address_add = eigrp_interface_address_add;
zclient->interface_address_delete = eigrp_interface_address_delete;
zclient->redistribute_route_add = eigrp_zebra_read_route;
zclient->redistribute_route_del = eigrp_zebra_read_route;
zclient->notify_owner = eigrp_zebra_notify_owner;
}
/* Zebra route add and delete treatment. */
static int eigrp_zebra_read_route(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct zapi_route api;
struct eigrp *eigrp;
if (zapi_route_decode(zclient->ibuf, &api) < 0)
return -1;
if (IPV4_NET127(ntohl(api.prefix.u.prefix4.s_addr)))
return 0;
eigrp = eigrp_lookup();
if (eigrp == NULL)
return 0;
if (command == ZEBRA_REDISTRIBUTE_ROUTE_ADD) {
} else /* if (command == ZEBRA_REDISTRIBUTE_ROUTE_DEL) */
{
}
return 0;
}
/* Inteface addition message from zebra. */
static int eigrp_interface_add(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct interface *ifp;
struct eigrp_interface *ei;
ifp = zebra_interface_add_read(zclient->ibuf, vrf_id);
if (!ifp->info)
return 0;
ei = ifp->info;
ei->params.type = eigrp_default_iftype(ifp);
eigrp_if_update(ifp);
return 0;
}
static int eigrp_interface_delete(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct interface *ifp;
struct stream *s;
s = zclient->ibuf;
/* zebra_interface_state_read () updates interface structure in iflist
*/
ifp = zebra_interface_state_read(s, vrf_id);
if (ifp == NULL)
return 0;
if (if_is_up(ifp))
zlog_warn("Zebra: got delete of %s, but interface is still up",
ifp->name);
if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE))
zlog_debug(
"Zebra: interface delete %s index %d flags %llx metric %d mtu %d",
ifp->name, ifp->ifindex, (unsigned long long)ifp->flags,
ifp->metric, ifp->mtu);
if (ifp->info)
eigrp_if_free(ifp->info,
INTERFACE_DOWN_BY_ZEBRA);
if_set_index(ifp, IFINDEX_INTERNAL);
return 0;
}
static int eigrp_interface_address_add(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct connected *c;
c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
if (c == NULL)
return 0;
if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) {
char buf[128];
prefix2str(c->address, buf, sizeof(buf));
zlog_debug("Zebra: interface %s address add %s", c->ifp->name,
buf);
}
eigrp_if_update(c->ifp);
return 0;
}
static int eigrp_interface_address_delete(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct connected *c;
struct interface *ifp;
struct eigrp_interface *ei;
c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
if (c == NULL)
return 0;
if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) {
char buf[128];
prefix2str(c->address, buf, sizeof(buf));
zlog_debug("Zebra: interface %s address delete %s",
c->ifp->name, buf);
}
ifp = c->ifp;
ei = ifp->info;
if (!ei)
return 0;
/* Call interface hook functions to clean up */
eigrp_if_free(ei, INTERFACE_DOWN_BY_ZEBRA);
connected_free(c);
return 0;
}
static int eigrp_interface_state_up(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct interface *ifp;
ifp = zebra_interface_if_lookup(zclient->ibuf);
if (ifp == NULL)
return 0;
/* Interface is already up. */
if (if_is_operative(ifp)) {
/* Temporarily keep ifp values. */
struct interface if_tmp;
memcpy(&if_tmp, ifp, sizeof(struct interface));
zebra_interface_if_set_value(zclient->ibuf, ifp);
if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE))
zlog_debug("Zebra: Interface[%s] state update.",
ifp->name);
if (if_tmp.bandwidth != ifp->bandwidth) {
if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE))
zlog_debug(
"Zebra: Interface[%s] bandwidth change %d -> %d.",
ifp->name, if_tmp.bandwidth,
ifp->bandwidth);
// eigrp_if_recalculate_output_cost (ifp);
}
if (if_tmp.mtu != ifp->mtu) {
if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE))
zlog_debug(
"Zebra: Interface[%s] MTU change %u -> %u.",
ifp->name, if_tmp.mtu, ifp->mtu);
/* Must reset the interface (simulate down/up) when MTU
* changes. */
eigrp_if_reset(ifp);
}
return 0;
}
zebra_interface_if_set_value(zclient->ibuf, ifp);
if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE))
zlog_debug("Zebra: Interface[%s] state change to up.",
ifp->name);
if (ifp->info)
eigrp_if_up(ifp->info);
return 0;
}
static int eigrp_interface_state_down(int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct interface *ifp;
ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
if (ifp == NULL)
return 0;
if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE))
zlog_debug("Zebra: Interface[%s] state change to down.",
ifp->name);
if (ifp->info)
eigrp_if_down(ifp->info);
return 0;
}
static struct interface *zebra_interface_if_lookup(struct stream *s)
{
char ifname_tmp[INTERFACE_NAMSIZ];
/* Read interface name. */
stream_get(ifname_tmp, s, INTERFACE_NAMSIZ);
/* And look it up. */
return if_lookup_by_name(ifname_tmp, VRF_DEFAULT);
}
void eigrp_zebra_route_add(struct prefix *p, struct list *successors)
{
struct zapi_route api;
struct zapi_nexthop *api_nh;
struct eigrp_nexthop_entry *te;
struct listnode *node;
int count = 0;
if (!zclient->redist[AFI_IP][ZEBRA_ROUTE_EIGRP])
return;
memset(&api, 0, sizeof(api));
api.vrf_id = VRF_DEFAULT;
api.type = ZEBRA_ROUTE_EIGRP;
api.safi = SAFI_UNICAST;
memcpy(&api.prefix, p, sizeof(*p));
SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
/* Nexthop, ifindex, distance and metric information. */
for (ALL_LIST_ELEMENTS_RO(successors, node, te)) {
if (count >= MULTIPATH_NUM)
break;
api_nh = &api.nexthops[count];
if (te->adv_router->src.s_addr) {
api_nh->gate.ipv4 = te->adv_router->src;
api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
} else
api_nh->type = NEXTHOP_TYPE_IFINDEX;
api_nh->ifindex = te->ei->ifp->ifindex;
count++;
}
api.nexthop_num = count;
if (IS_DEBUG_EIGRP(zebra, ZEBRA_REDISTRIBUTE)) {
char buf[2][PREFIX_STRLEN];
zlog_debug("Zebra: Route add %s nexthop %s",
prefix2str(p, buf[0], PREFIX_STRLEN),
inet_ntop(AF_INET, 0, buf[1], PREFIX_STRLEN));
}
zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
}
void eigrp_zebra_route_delete(struct prefix *p)
{
struct zapi_route api;
if (!zclient->redist[AFI_IP][ZEBRA_ROUTE_EIGRP])
return;
memset(&api, 0, sizeof(api));
api.vrf_id = VRF_DEFAULT;
api.type = ZEBRA_ROUTE_EIGRP;
api.safi = SAFI_UNICAST;
memcpy(&api.prefix, p, sizeof(*p));
zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
if (IS_DEBUG_EIGRP(zebra, ZEBRA_REDISTRIBUTE)) {
char buf[PREFIX_STRLEN];
zlog_debug("Zebra: Route del %s",
prefix2str(p, buf, PREFIX_STRLEN));
}
return;
}
int eigrp_is_type_redistributed(int type)
{
return ((DEFAULT_ROUTE_TYPE(type))
? vrf_bitmap_check(zclient->default_information,
VRF_DEFAULT)
: vrf_bitmap_check(zclient->redist[AFI_IP][type],
VRF_DEFAULT));
}
int eigrp_redistribute_set(struct eigrp *eigrp, int type,
struct eigrp_metrics metric)
{
if (eigrp_is_type_redistributed(type)) {
if (eigrp_metrics_is_same(metric, eigrp->dmetric[type])) {
eigrp->dmetric[type] = metric;
}
eigrp_external_routes_refresh(eigrp, type);
// if (IS_DEBUG_EIGRP(zebra, ZEBRA_REDISTRIBUTE))
// zlog_debug ("Redistribute[%s]: Refresh Type[%d],
// Metric[%d]",
// eigrp_redist_string(type),
// metric_type (eigrp, type), metric_value
// (eigrp, type));
return CMD_SUCCESS;
}
eigrp->dmetric[type] = metric;
zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, type, 0,
VRF_DEFAULT);
++eigrp->redistribute;
return CMD_SUCCESS;
}
int eigrp_redistribute_unset(struct eigrp *eigrp, int type)
{
if (eigrp_is_type_redistributed(type)) {
memset(&eigrp->dmetric[type], 0, sizeof(struct eigrp_metrics));
zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE, zclient, AFI_IP,
type, 0, VRF_DEFAULT);
--eigrp->redistribute;
}
return CMD_SUCCESS;
}
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