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rip_interface.c
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/* Interface related function for RIP.
* Copyright (C) 1997, 98 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 "if.h"
#include "sockunion.h"
#include "prefix.h"
#include "memory.h"
#include "network.h"
#include "table.h"
#include "log.h"
#include "stream.h"
#include "thread.h"
#include "zclient.h"
#include "filter.h"
#include "sockopt.h"
#include "privs.h"
#include "lib_errors.h"
#include "northbound_cli.h"
#include "zebra/connected.h"
#include "ripd/ripd.h"
#include "ripd/rip_debug.h"
#include "ripd/rip_interface.h"
DEFINE_MTYPE_STATIC(RIPD, RIP_INTERFACE, "RIP interface");
DEFINE_MTYPE(RIPD, RIP_INTERFACE_STRING, "RIP Interface String");
DEFINE_HOOK(rip_ifaddr_add, (struct connected * ifc), (ifc));
DEFINE_HOOK(rip_ifaddr_del, (struct connected * ifc), (ifc));
/* static prototypes */
static void rip_enable_apply(struct interface *);
static void rip_passive_interface_apply(struct interface *);
static int rip_if_down(struct interface *ifp);
static int rip_enable_if_lookup(struct rip *rip, const char *ifname);
static int rip_enable_network_lookup2(struct connected *connected);
static void rip_enable_apply_all(struct rip *rip);
const struct message ri_version_msg[] = {{RI_RIP_VERSION_1, "1"},
{RI_RIP_VERSION_2, "2"},
{RI_RIP_VERSION_1_AND_2, "1 2"},
{RI_RIP_VERSION_NONE, "none"},
{0}};
/* Join to the RIP version 2 multicast group. */
static int ipv4_multicast_join(int sock, struct in_addr group,
struct in_addr ifa, ifindex_t ifindex)
{
int ret;
ret = setsockopt_ipv4_multicast(sock, IP_ADD_MEMBERSHIP, ifa,
group.s_addr, ifindex);
if (ret < 0)
zlog_info("can't setsockopt IP_ADD_MEMBERSHIP %s",
safe_strerror(errno));
return ret;
}
/* Leave from the RIP version 2 multicast group. */
static int ipv4_multicast_leave(int sock, struct in_addr group,
struct in_addr ifa, ifindex_t ifindex)
{
int ret;
ret = setsockopt_ipv4_multicast(sock, IP_DROP_MEMBERSHIP, ifa,
group.s_addr, ifindex);
if (ret < 0)
zlog_info("can't setsockopt IP_DROP_MEMBERSHIP");
return ret;
}
static void rip_interface_reset(struct rip_interface *);
/* Allocate new RIP's interface configuration. */
static struct rip_interface *rip_interface_new(void)
{
struct rip_interface *ri;
ri = XCALLOC(MTYPE_RIP_INTERFACE, sizeof(struct rip_interface));
rip_interface_reset(ri);
return ri;
}
void rip_interface_multicast_set(int sock, struct connected *connected)
{
struct in_addr addr;
assert(connected != NULL);
addr = CONNECTED_ID(connected)->u.prefix4;
if (setsockopt_ipv4_multicast_if(sock, addr, connected->ifp->ifindex)
< 0) {
zlog_warn(
"Can't setsockopt IP_MULTICAST_IF on fd %d to ifindex %d for interface %s",
sock, connected->ifp->ifindex, connected->ifp->name);
}
return;
}
/* Send RIP request packet to specified interface. */
static void rip_request_interface_send(struct interface *ifp, uint8_t version)
{
struct sockaddr_in to;
/* RIPv2 support multicast. */
if (version == RIPv2 && if_is_multicast(ifp)) {
if (IS_RIP_DEBUG_EVENT)
zlog_debug("multicast request on %s", ifp->name);
rip_request_send(NULL, ifp, version, NULL);
return;
}
/* RIPv1 and non multicast interface. */
if (if_is_pointopoint(ifp) || if_is_broadcast(ifp)) {
struct listnode *cnode, *cnnode;
struct connected *connected;
if (IS_RIP_DEBUG_EVENT)
zlog_debug("broadcast request to %s", ifp->name);
for (ALL_LIST_ELEMENTS(ifp->connected, cnode, cnnode,
connected)) {
if (connected->address->family != AF_INET)
continue;
memset(&to, 0, sizeof(struct sockaddr_in));
to.sin_port = htons(RIP_PORT_DEFAULT);
if (connected->destination)
/* use specified broadcast or peer
* destination addr */
to.sin_addr = connected->destination->u.prefix4;
else if (connected->address->prefixlen
< IPV4_MAX_BITLEN)
/* calculate the appropriate broadcast
* address */
to.sin_addr.s_addr = ipv4_broadcast_addr(
connected->address->u.prefix4.s_addr,
connected->address->prefixlen);
else
/* do not know where to send the packet
*/
continue;
if (IS_RIP_DEBUG_EVENT)
zlog_debug("SEND request to %pI4",
&to.sin_addr);
rip_request_send(&to, ifp, version, connected);
}
}
}
/* This will be executed when interface goes up. */
static void rip_request_interface(struct interface *ifp)
{
struct rip_interface *ri;
int vsend;
/* In default ripd doesn't send RIP_REQUEST to the loopback interface.
*/
if (if_is_loopback(ifp))
return;
/* If interface is down, don't send RIP packet. */
if (!if_is_operative(ifp))
return;
/* Fetch RIP interface information. */
ri = ifp->info;
/* If there is no version configuration in the interface,
use rip's version setting. */
vsend = ((ri->ri_send == RI_RIP_UNSPEC) ? ri->rip->version_send
: ri->ri_send);
if (vsend & RIPv1)
rip_request_interface_send(ifp, RIPv1);
if (vsend & RIPv2)
rip_request_interface_send(ifp, RIPv2);
}
/* Multicast packet receive socket. */
static int rip_multicast_join(struct interface *ifp, int sock)
{
struct listnode *cnode;
struct connected *ifc;
if (if_is_operative(ifp) && if_is_multicast(ifp)) {
if (IS_RIP_DEBUG_EVENT)
zlog_debug("multicast join at %s", ifp->name);
for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, ifc)) {
struct prefix_ipv4 *p;
struct in_addr group;
p = (struct prefix_ipv4 *)ifc->address;
if (p->family != AF_INET)
continue;
group.s_addr = htonl(INADDR_RIP_GROUP);
if (ipv4_multicast_join(sock, group, p->prefix,
ifp->ifindex)
< 0)
return -1;
else
return 0;
}
}
return 0;
}
/* Leave from multicast group. */
static void rip_multicast_leave(struct interface *ifp, int sock)
{
struct listnode *cnode;
struct connected *connected;
if (if_is_up(ifp) && if_is_multicast(ifp)) {
if (IS_RIP_DEBUG_EVENT)
zlog_debug("multicast leave from %s", ifp->name);
for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, connected)) {
struct prefix_ipv4 *p;
struct in_addr group;
p = (struct prefix_ipv4 *)connected->address;
if (p->family != AF_INET)
continue;
group.s_addr = htonl(INADDR_RIP_GROUP);
if (ipv4_multicast_leave(sock, group, p->prefix,
ifp->ifindex)
== 0)
return;
}
}
}
/* Is there and address on interface that I could use ? */
static int rip_if_ipv4_address_check(struct interface *ifp)
{
struct listnode *nn;
struct connected *connected;
int count = 0;
for (ALL_LIST_ELEMENTS_RO(ifp->connected, nn, connected)) {
struct prefix *p;
p = connected->address;
if (p->family == AF_INET)
count++;
}
return count;
}
/* Does this address belongs to me ? */
int if_check_address(struct rip *rip, struct in_addr addr)
{
struct interface *ifp;
FOR_ALL_INTERFACES (rip->vrf, ifp) {
struct listnode *cnode;
struct connected *connected;
for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, connected)) {
struct prefix_ipv4 *p;
p = (struct prefix_ipv4 *)connected->address;
if (p->family != AF_INET)
continue;
if (IPV4_ADDR_CMP(&p->prefix, &addr) == 0)
return 1;
}
}
return 0;
}
/* Interface link down message processing. */
static int rip_ifp_down(struct interface *ifp)
{
rip_interface_sync(ifp);
rip_if_down(ifp);
if (IS_RIP_DEBUG_ZEBRA)
zlog_debug(
"interface %s vrf %s(%u) index %d flags %llx metric %d mtu %d is down",
ifp->name, ifp->vrf->name, ifp->vrf->vrf_id,
ifp->ifindex, (unsigned long long)ifp->flags,
ifp->metric, ifp->mtu);
return 0;
}
/* Interface link up message processing */
static int rip_ifp_up(struct interface *ifp)
{
if (IS_RIP_DEBUG_ZEBRA)
zlog_debug(
"interface %s vrf %s(%u) index %d flags %#llx metric %d mtu %d is up",
ifp->name, ifp->vrf->name, ifp->vrf->vrf_id,
ifp->ifindex, (unsigned long long)ifp->flags,
ifp->metric, ifp->mtu);
rip_interface_sync(ifp);
/* Check if this interface is RIP enabled or not.*/
rip_enable_apply(ifp);
/* Check for a passive interface */
rip_passive_interface_apply(ifp);
/* Apply distribute list to the all interface. */
rip_distribute_update_interface(ifp);
return 0;
}
/* Interface addition message from zebra. */
static int rip_ifp_create(struct interface *ifp)
{
rip_interface_sync(ifp);
if (IS_RIP_DEBUG_ZEBRA)
zlog_debug(
"interface add %s vrf %s(%u) index %d flags %#llx metric %d mtu %d",
ifp->name, ifp->vrf->name, ifp->vrf->vrf_id,
ifp->ifindex, (unsigned long long)ifp->flags,
ifp->metric, ifp->mtu);
/* Check if this interface is RIP enabled or not.*/
rip_enable_apply(ifp);
/* Check for a passive interface */
rip_passive_interface_apply(ifp);
/* Apply distribute list to the all interface. */
rip_distribute_update_interface(ifp);
/* rip_request_neighbor_all (); */
/* Check interface routemap. */
rip_if_rmap_update_interface(ifp);
return 0;
}
static int rip_ifp_destroy(struct interface *ifp)
{
rip_interface_sync(ifp);
if (if_is_up(ifp)) {
rip_if_down(ifp);
}
if (IS_RIP_DEBUG_ZEBRA)
zlog_debug(
"interface delete %s vrf %s(%u) index %d flags %#llx metric %d mtu %d",
ifp->name, ifp->vrf->name, ifp->vrf->vrf_id,
ifp->ifindex, (unsigned long long)ifp->flags,
ifp->metric, ifp->mtu);
return 0;
}
/* VRF update for an interface. */
int rip_interface_vrf_update(ZAPI_CALLBACK_ARGS)
{
struct interface *ifp;
vrf_id_t new_vrf_id;
ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
&new_vrf_id);
if (!ifp)
return 0;
if (IS_RIP_DEBUG_ZEBRA) {
struct vrf *nvrf = vrf_lookup_by_id(new_vrf_id);
zlog_debug("interface %s VRF change vrf %s(%u) new vrf %s(%u)",
ifp->name, ifp->vrf->name, vrf_id, VRF_LOGNAME(nvrf),
new_vrf_id);
}
if_update_to_new_vrf(ifp, new_vrf_id);
rip_interface_sync(ifp);
return 0;
}
static void rip_interface_clean(struct rip_interface *ri)
{
ri->enable_network = 0;
ri->enable_interface = 0;
ri->running = 0;
THREAD_OFF(ri->t_wakeup);
}
void rip_interfaces_clean(struct rip *rip)
{
struct interface *ifp;
FOR_ALL_INTERFACES (rip->vrf, ifp)
rip_interface_clean(ifp->info);
}
static void rip_interface_reset(struct rip_interface *ri)
{
ri->auth_type = yang_get_default_enum("%s/authentication-scheme/mode",
RIP_IFACE);
ri->md5_auth_len = yang_get_default_enum(
"%s/authentication-scheme/md5-auth-length", RIP_IFACE);
/* Set default split-horizon behavior. If the interface is Frame
Relay or SMDS is enabled, the default value for split-horizon is
off. But currently Zebra does detect Frame Relay or SMDS
interface. So all interface is set to split horizon. */
ri->split_horizon =
yang_get_default_enum("%s/split-horizon", RIP_IFACE);
ri->ri_send = yang_get_default_enum("%s/version-send", RIP_IFACE);
ri->ri_receive = yang_get_default_enum("%s/version-receive", RIP_IFACE);
ri->v2_broadcast = yang_get_default_bool("%s/v2-broadcast", RIP_IFACE);
XFREE(MTYPE_RIP_INTERFACE_STRING, ri->auth_str);
XFREE(MTYPE_RIP_INTERFACE_STRING, ri->key_chain);
ri->list[RIP_FILTER_IN] = NULL;
ri->list[RIP_FILTER_OUT] = NULL;
ri->prefix[RIP_FILTER_IN] = NULL;
ri->prefix[RIP_FILTER_OUT] = NULL;
ri->recv_badpackets = 0;
ri->recv_badroutes = 0;
ri->sent_updates = 0;
ri->passive = 0;
rip_interface_clean(ri);
}
int rip_if_down(struct interface *ifp)
{
struct rip *rip;
struct route_node *rp;
struct rip_info *rinfo;
struct rip_interface *ri = NULL;
struct list *list = NULL;
struct listnode *listnode = NULL, *nextnode = NULL;
ri = ifp->info;
THREAD_OFF(ri->t_wakeup);
rip = ri->rip;
if (rip) {
for (rp = route_top(rip->table); rp; rp = route_next(rp))
if ((list = rp->info) != NULL)
for (ALL_LIST_ELEMENTS(list, listnode, nextnode,
rinfo))
if (rinfo->nh.ifindex == ifp->ifindex)
rip_ecmp_delete(rip, rinfo);
if (ri->running) {
if (IS_RIP_DEBUG_EVENT)
zlog_debug("turn off %s", ifp->name);
/* Leave from multicast group. */
rip_multicast_leave(ifp, rip->sock);
ri->running = 0;
}
}
return 0;
}
static void rip_apply_address_add(struct connected *ifc)
{
struct rip_interface *ri = ifc->ifp->info;
struct rip *rip = ri->rip;
struct prefix_ipv4 address;
struct nexthop nh;
struct prefix *p;
if (!rip)
return;
if (!if_is_up(ifc->ifp))
return;
p = ifc->address;
memset(&address, 0, sizeof(address));
memset(&nh, 0, sizeof(nh));
address.family = p->family;
address.prefix = p->u.prefix4;
address.prefixlen = p->prefixlen;
apply_mask_ipv4(&address);
nh.ifindex = ifc->ifp->ifindex;
nh.type = NEXTHOP_TYPE_IFINDEX;
/* Check if this interface is RIP enabled or not
or Check if this address's prefix is RIP enabled */
if ((rip_enable_if_lookup(rip, ifc->ifp->name) >= 0)
|| (rip_enable_network_lookup2(ifc) >= 0))
rip_redistribute_add(rip, ZEBRA_ROUTE_CONNECT,
RIP_ROUTE_INTERFACE, &address, &nh, 0, 0,
0);
}
int rip_interface_address_add(ZAPI_CALLBACK_ARGS)
{
struct connected *ifc;
struct prefix *p;
ifc = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD,
zclient->ibuf, vrf_id);
if (ifc == NULL)
return 0;
p = ifc->address;
if (p->family == AF_INET) {
if (IS_RIP_DEBUG_ZEBRA)
zlog_debug("connected address %pFX is added", p);
rip_enable_apply(ifc->ifp);
/* Check if this prefix needs to be redistributed */
rip_apply_address_add(ifc);
hook_call(rip_ifaddr_add, ifc);
}
return 0;
}
static void rip_apply_address_del(struct connected *ifc)
{
struct rip_interface *ri = ifc->ifp->info;
struct rip *rip = ri->rip;
struct prefix_ipv4 address;
struct prefix *p;
if (!rip)
return;
if (!if_is_up(ifc->ifp))
return;
p = ifc->address;
memset(&address, 0, sizeof(address));
address.family = p->family;
address.prefix = p->u.prefix4;
address.prefixlen = p->prefixlen;
apply_mask_ipv4(&address);
rip_redistribute_delete(rip, ZEBRA_ROUTE_CONNECT, RIP_ROUTE_INTERFACE,
&address, ifc->ifp->ifindex);
}
int rip_interface_address_delete(ZAPI_CALLBACK_ARGS)
{
struct connected *ifc;
struct prefix *p;
ifc = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE,
zclient->ibuf, vrf_id);
if (ifc) {
p = ifc->address;
if (p->family == AF_INET) {
if (IS_RIP_DEBUG_ZEBRA)
zlog_debug("connected address %pFX is deleted",
p);
hook_call(rip_ifaddr_del, ifc);
/* Chech whether this prefix needs to be removed */
rip_apply_address_del(ifc);
}
connected_free(&ifc);
}
return 0;
}
/* Check interface is enabled by network statement. */
/* Check whether the interface has at least a connected prefix that
* is within the ripng_enable_network table. */
static int rip_enable_network_lookup_if(struct interface *ifp)
{
struct rip_interface *ri = ifp->info;
struct rip *rip = ri->rip;
struct listnode *node, *nnode;
struct connected *connected;
struct prefix_ipv4 address;
if (!rip)
return -1;
for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, connected)) {
struct prefix *p;
struct route_node *n;
p = connected->address;
if (p->family == AF_INET) {
address.family = AF_INET;
address.prefix = p->u.prefix4;
address.prefixlen = IPV4_MAX_BITLEN;
n = route_node_match(rip->enable_network,
(struct prefix *)&address);
if (n) {
route_unlock_node(n);
return 1;
}
}
}
return -1;
}
/* Check whether connected is within the ripng_enable_network table. */
static int rip_enable_network_lookup2(struct connected *connected)
{
struct rip_interface *ri = connected->ifp->info;
struct rip *rip = ri->rip;
struct prefix_ipv4 address;
struct prefix *p;
p = connected->address;
if (p->family == AF_INET) {
struct route_node *node;
address.family = p->family;
address.prefix = p->u.prefix4;
address.prefixlen = IPV4_MAX_BITLEN;
/* LPM on p->family, p->u.prefix4/IPV4_MAX_BITLEN within
* rip->enable_network */
node = route_node_match(rip->enable_network,
(struct prefix *)&address);
if (node) {
route_unlock_node(node);
return 1;
}
}
return -1;
}
/* Add RIP enable network. */
int rip_enable_network_add(struct rip *rip, struct prefix *p)
{
struct route_node *node;
node = route_node_get(rip->enable_network, p);
if (node->info) {
route_unlock_node(node);
return NB_ERR_INCONSISTENCY;
} else
node->info = (void *)1;
/* XXX: One should find a better solution than a generic one */
rip_enable_apply_all(rip);
return NB_OK;
}
/* Delete RIP enable network. */
int rip_enable_network_delete(struct rip *rip, struct prefix *p)
{
struct route_node *node;
node = route_node_lookup(rip->enable_network, p);
if (node) {
node->info = NULL;
/* Unlock info lock. */
route_unlock_node(node);
/* Unlock lookup lock. */
route_unlock_node(node);
/* XXX: One should find a better solution than a generic one */
rip_enable_apply_all(rip);
return NB_OK;
}
return NB_ERR_INCONSISTENCY;
}
/* Check interface is enabled by ifname statement. */
static int rip_enable_if_lookup(struct rip *rip, const char *ifname)
{
unsigned int i;
char *str;
if (!rip)
return -1;
for (i = 0; i < vector_active(rip->enable_interface); i++)
if ((str = vector_slot(rip->enable_interface, i)) != NULL)
if (strcmp(str, ifname) == 0)
return i;
return -1;
}
/* Add interface to rip_enable_if. */
int rip_enable_if_add(struct rip *rip, const char *ifname)
{
int ret;
ret = rip_enable_if_lookup(rip, ifname);
if (ret >= 0)
return NB_ERR_INCONSISTENCY;
vector_set(rip->enable_interface,
XSTRDUP(MTYPE_RIP_INTERFACE_STRING, ifname));
rip_enable_apply_all(rip); /* TODOVJ */
return NB_OK;
}
/* Delete interface from rip_enable_if. */
int rip_enable_if_delete(struct rip *rip, const char *ifname)
{
int index;
char *str;
index = rip_enable_if_lookup(rip, ifname);
if (index < 0)
return NB_ERR_INCONSISTENCY;
str = vector_slot(rip->enable_interface, index);
XFREE(MTYPE_RIP_INTERFACE_STRING, str);
vector_unset(rip->enable_interface, index);
rip_enable_apply_all(rip); /* TODOVJ */
return NB_OK;
}
/* Join to multicast group and send request to the interface. */
static void rip_interface_wakeup(struct thread *t)
{
struct interface *ifp;
struct rip_interface *ri;
/* Get interface. */
ifp = THREAD_ARG(t);
ri = ifp->info;
/* Join to multicast group. */
if (rip_multicast_join(ifp, ri->rip->sock) < 0) {
flog_err_sys(EC_LIB_SOCKET,
"multicast join failed, interface %s not running",
ifp->name);
return;
}
/* Set running flag. */
ri->running = 1;
/* Send RIP request to the interface. */
rip_request_interface(ifp);
}
static void rip_connect_set(struct interface *ifp, int set)
{
struct rip_interface *ri = ifp->info;
struct rip *rip = ri->rip;
struct listnode *node, *nnode;
struct connected *connected;
struct prefix_ipv4 address;
struct nexthop nh;
memset(&nh, 0, sizeof(nh));
for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, connected)) {
struct prefix *p;
p = connected->address;
if (p->family != AF_INET)
continue;
address.family = AF_INET;
address.prefix = p->u.prefix4;
address.prefixlen = p->prefixlen;
apply_mask_ipv4(&address);
nh.ifindex = connected->ifp->ifindex;
nh.type = NEXTHOP_TYPE_IFINDEX;
if (set) {
/* Check once more whether this prefix is within a
* "network IF_OR_PREF" one */
if ((rip_enable_if_lookup(rip, connected->ifp->name)
>= 0)
|| (rip_enable_network_lookup2(connected) >= 0))
rip_redistribute_add(rip, ZEBRA_ROUTE_CONNECT,
RIP_ROUTE_INTERFACE,
&address, &nh, 0, 0, 0);
} else {
rip_redistribute_delete(rip, ZEBRA_ROUTE_CONNECT,
RIP_ROUTE_INTERFACE, &address,
connected->ifp->ifindex);
if (rip_redistribute_check(rip, ZEBRA_ROUTE_CONNECT))
rip_redistribute_add(rip, ZEBRA_ROUTE_CONNECT,
RIP_ROUTE_REDISTRIBUTE,
&address, &nh, 0, 0, 0);
}
}
}
/* Update interface status. */
void rip_enable_apply(struct interface *ifp)
{
int ret;
struct rip_interface *ri = NULL;
/* Check interface. */
if (!if_is_operative(ifp))
return;
ri = ifp->info;
/* Check network configuration. */
ret = rip_enable_network_lookup_if(ifp);
/* If the interface is matched. */
if (ret > 0)
ri->enable_network = 1;
else
ri->enable_network = 0;
/* Check interface name configuration. */
ret = rip_enable_if_lookup(ri->rip, ifp->name);
if (ret >= 0)
ri->enable_interface = 1;
else
ri->enable_interface = 0;
/* any interface MUST have an IPv4 address */
if (!rip_if_ipv4_address_check(ifp)) {
ri->enable_network = 0;
ri->enable_interface = 0;
}
/* Update running status of the interface. */
if (ri->enable_network || ri->enable_interface) {
if (IS_RIP_DEBUG_EVENT)
zlog_debug("turn on %s", ifp->name);
/* Add interface wake up thread. */
thread_add_timer(master, rip_interface_wakeup, ifp, 1,
&ri->t_wakeup);
rip_connect_set(ifp, 1);
} else if (ri->running) {
/* Might as well clean up the route table as well
* rip_if_down sets to 0 ri->running, and displays "turn
*off %s"
**/
rip_if_down(ifp);
rip_connect_set(ifp, 0);
}
}
/* Apply network configuration to all interface. */
static void rip_enable_apply_all(struct rip *rip)
{
struct interface *ifp;
/* Check each interface. */
FOR_ALL_INTERFACES (rip->vrf, ifp)
rip_enable_apply(ifp);
}
int rip_neighbor_lookup(struct rip *rip, struct sockaddr_in *from)
{
struct prefix_ipv4 p;
struct route_node *node;
memset(&p, 0, sizeof(p));
p.family = AF_INET;
p.prefix = from->sin_addr;
p.prefixlen = IPV4_MAX_BITLEN;
node = route_node_lookup(rip->neighbor, (struct prefix *)&p);
if (node) {
route_unlock_node(node);
return 1;
}
return 0;
}
/* Add new RIP neighbor to the neighbor tree. */
int rip_neighbor_add(struct rip *rip, struct prefix_ipv4 *p)
{
struct route_node *node;
node = route_node_get(rip->neighbor, (struct prefix *)p);
if (node->info)
return NB_ERR_INCONSISTENCY;
node->info = rip->neighbor;
return NB_OK;
}
/* Delete RIP neighbor from the neighbor tree. */
int rip_neighbor_delete(struct rip *rip, struct prefix_ipv4 *p)
{
struct route_node *node;
/* Lock for look up. */
node = route_node_lookup(rip->neighbor, (struct prefix *)p);
if (!node)
return NB_ERR_INCONSISTENCY;
node->info = NULL;
/* Unlock lookup lock. */
route_unlock_node(node);
/* Unlock real neighbor information lock. */
route_unlock_node(node);
return NB_OK;
}
/* Clear all network and neighbor configuration. */
void rip_clean_network(struct rip *rip)
{
unsigned int i;
char *str;
struct route_node *rn;
/* rip->enable_network. */
for (rn = route_top(rip->enable_network); rn; rn = route_next(rn))
if (rn->info) {
rn->info = NULL;
route_unlock_node(rn);
}
/* rip->enable_interface. */
for (i = 0; i < vector_active(rip->enable_interface); i++)
if ((str = vector_slot(rip->enable_interface, i)) != NULL) {
XFREE(MTYPE_RIP_INTERFACE_STRING, str);
vector_slot(rip->enable_interface, i) = NULL;
}