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721c08573a
Set the connected pointer to set the pointer to NULL. Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
320 lines
7.8 KiB
C
320 lines
7.8 KiB
C
/*
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* Zebra connect library for EIGRP.
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* Copyright (C) 2013-2014
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* Authors:
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* Donnie Savage
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* Jan Janovic
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* Matej Perina
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* Peter Orsag
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* Peter Paluch
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <zebra.h>
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#include "thread.h"
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#include "command.h"
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#include "network.h"
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#include "prefix.h"
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#include "routemap.h"
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#include "table.h"
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#include "stream.h"
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#include "memory.h"
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#include "zclient.h"
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#include "filter.h"
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#include "plist.h"
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#include "log.h"
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#include "nexthop.h"
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#include "eigrpd/eigrp_structs.h"
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#include "eigrpd/eigrpd.h"
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#include "eigrpd/eigrp_interface.h"
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#include "eigrpd/eigrp_neighbor.h"
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#include "eigrpd/eigrp_packet.h"
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#include "eigrpd/eigrp_zebra.h"
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#include "eigrpd/eigrp_vty.h"
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#include "eigrpd/eigrp_dump.h"
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#include "eigrpd/eigrp_network.h"
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#include "eigrpd/eigrp_topology.h"
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#include "eigrpd/eigrp_fsm.h"
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static int eigrp_interface_address_add(ZAPI_CALLBACK_ARGS);
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static int eigrp_interface_address_delete(ZAPI_CALLBACK_ARGS);
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static int eigrp_zebra_read_route(ZAPI_CALLBACK_ARGS);
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/* Zebra structure to hold current status. */
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struct zclient *zclient = NULL;
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/* For registering threads. */
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extern struct thread_master *master;
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struct in_addr router_id_zebra;
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/* Router-id update message from zebra. */
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static int eigrp_router_id_update_zebra(ZAPI_CALLBACK_ARGS)
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{
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struct eigrp *eigrp;
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struct prefix router_id;
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zebra_router_id_update_read(zclient->ibuf, &router_id);
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router_id_zebra = router_id.u.prefix4;
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eigrp = eigrp_lookup(vrf_id);
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if (eigrp != NULL)
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eigrp_router_id_update(eigrp);
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return 0;
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}
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static int eigrp_zebra_route_notify_owner(ZAPI_CALLBACK_ARGS)
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{
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struct prefix p;
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enum zapi_route_notify_owner note;
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uint32_t table;
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if (!zapi_route_notify_decode(zclient->ibuf, &p, &table, ¬e))
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return -1;
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return 0;
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}
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static void eigrp_zebra_connected(struct zclient *zclient)
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{
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zclient_send_reg_requests(zclient, VRF_DEFAULT);
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}
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void eigrp_zebra_init(void)
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{
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struct zclient_options opt = {.receive_notify = false};
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zclient = zclient_new(master, &opt);
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zclient_init(zclient, ZEBRA_ROUTE_EIGRP, 0, &eigrpd_privs);
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zclient->zebra_connected = eigrp_zebra_connected;
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zclient->router_id_update = eigrp_router_id_update_zebra;
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zclient->interface_address_add = eigrp_interface_address_add;
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zclient->interface_address_delete = eigrp_interface_address_delete;
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zclient->redistribute_route_add = eigrp_zebra_read_route;
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zclient->redistribute_route_del = eigrp_zebra_read_route;
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zclient->route_notify_owner = eigrp_zebra_route_notify_owner;
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}
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/* Zebra route add and delete treatment. */
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static int eigrp_zebra_read_route(ZAPI_CALLBACK_ARGS)
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{
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struct zapi_route api;
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struct eigrp *eigrp;
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if (zapi_route_decode(zclient->ibuf, &api) < 0)
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return -1;
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if (IPV4_NET127(ntohl(api.prefix.u.prefix4.s_addr)))
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return 0;
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eigrp = eigrp_lookup(vrf_id);
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if (eigrp == NULL)
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return 0;
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if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD) {
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} else /* if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_DEL) */
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{
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}
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return 0;
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}
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static int eigrp_interface_address_add(ZAPI_CALLBACK_ARGS)
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{
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struct connected *c;
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c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
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if (c == NULL)
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return 0;
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if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) {
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char buf[128];
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prefix2str(c->address, buf, sizeof(buf));
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zlog_debug("Zebra: interface %s address add %s", c->ifp->name,
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buf);
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}
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eigrp_if_update(c->ifp);
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return 0;
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}
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static int eigrp_interface_address_delete(ZAPI_CALLBACK_ARGS)
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{
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struct connected *c;
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struct interface *ifp;
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struct eigrp_interface *ei;
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c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
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if (c == NULL)
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return 0;
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if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) {
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char buf[128];
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prefix2str(c->address, buf, sizeof(buf));
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zlog_debug("Zebra: interface %s address delete %s",
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c->ifp->name, buf);
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}
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ifp = c->ifp;
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ei = ifp->info;
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if (!ei)
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return 0;
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/* Call interface hook functions to clean up */
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if (prefix_cmp(&ei->address, c->address) == 0)
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eigrp_if_free(ei, INTERFACE_DOWN_BY_ZEBRA);
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connected_free(&c);
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return 0;
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}
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void eigrp_zebra_route_add(struct eigrp *eigrp, struct prefix *p,
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struct list *successors, uint32_t distance)
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{
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struct zapi_route api;
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struct zapi_nexthop *api_nh;
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struct eigrp_nexthop_entry *te;
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struct listnode *node;
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int count = 0;
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if (!zclient->redist[AFI_IP][ZEBRA_ROUTE_EIGRP])
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return;
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memset(&api, 0, sizeof(api));
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api.vrf_id = eigrp->vrf_id;
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api.type = ZEBRA_ROUTE_EIGRP;
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api.safi = SAFI_UNICAST;
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api.metric = distance;
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memcpy(&api.prefix, p, sizeof(*p));
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SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
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SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
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/* Nexthop, ifindex, distance and metric information. */
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for (ALL_LIST_ELEMENTS_RO(successors, node, te)) {
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if (count >= MULTIPATH_NUM)
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break;
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api_nh = &api.nexthops[count];
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api_nh->vrf_id = eigrp->vrf_id;
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if (te->adv_router->src.s_addr) {
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api_nh->gate.ipv4 = te->adv_router->src;
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api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
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} else
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api_nh->type = NEXTHOP_TYPE_IFINDEX;
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api_nh->ifindex = te->ei->ifp->ifindex;
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count++;
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}
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api.nexthop_num = count;
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if (IS_DEBUG_EIGRP(zebra, ZEBRA_REDISTRIBUTE)) {
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char buf[2][PREFIX_STRLEN];
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zlog_debug("Zebra: Route add %s nexthop %s",
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prefix2str(p, buf[0], PREFIX_STRLEN),
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inet_ntop(AF_INET, 0, buf[1], PREFIX_STRLEN));
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}
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zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
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}
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void eigrp_zebra_route_delete(struct eigrp *eigrp, struct prefix *p)
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{
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struct zapi_route api;
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if (!zclient->redist[AFI_IP][ZEBRA_ROUTE_EIGRP])
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return;
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memset(&api, 0, sizeof(api));
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api.vrf_id = eigrp->vrf_id;
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api.type = ZEBRA_ROUTE_EIGRP;
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api.safi = SAFI_UNICAST;
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memcpy(&api.prefix, p, sizeof(*p));
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zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
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if (IS_DEBUG_EIGRP(zebra, ZEBRA_REDISTRIBUTE)) {
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char buf[PREFIX_STRLEN];
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zlog_debug("Zebra: Route del %s",
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prefix2str(p, buf, PREFIX_STRLEN));
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}
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return;
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}
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static int eigrp_is_type_redistributed(int type, vrf_id_t vrf_id)
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{
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return ((DEFAULT_ROUTE_TYPE(type))
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? vrf_bitmap_check(zclient->default_information[AFI_IP],
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vrf_id)
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: vrf_bitmap_check(zclient->redist[AFI_IP][type],
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vrf_id));
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}
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int eigrp_redistribute_set(struct eigrp *eigrp, int type,
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struct eigrp_metrics metric)
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{
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if (eigrp_is_type_redistributed(type, eigrp->vrf_id)) {
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if (eigrp_metrics_is_same(metric, eigrp->dmetric[type])) {
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eigrp->dmetric[type] = metric;
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}
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eigrp_external_routes_refresh(eigrp, type);
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// if (IS_DEBUG_EIGRP(zebra, ZEBRA_REDISTRIBUTE))
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// zlog_debug ("Redistribute[%s]: Refresh Type[%d],
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// Metric[%d]",
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// eigrp_redist_string(type),
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// metric_type (eigrp, type), metric_value
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// (eigrp, type));
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return CMD_SUCCESS;
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}
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eigrp->dmetric[type] = metric;
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zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, type, 0,
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eigrp->vrf_id);
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++eigrp->redistribute;
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return CMD_SUCCESS;
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}
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int eigrp_redistribute_unset(struct eigrp *eigrp, int type)
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{
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if (eigrp_is_type_redistributed(type, eigrp->vrf_id)) {
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memset(&eigrp->dmetric[type], 0, sizeof(struct eigrp_metrics));
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zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE, zclient, AFI_IP,
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type, 0, eigrp->vrf_id);
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--eigrp->redistribute;
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}
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return CMD_SUCCESS;
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}
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