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zebra: Remove static ARP entries on interface down events

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Without this patch, static ARP entries remain active even if the interface is
down, but the kernel already removed them.

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
This commit is contained in:
Donatas Abraitis 2023-10-31 17:09:48 +02:00
parent c772c52e62
commit a35bb7e2a8
3 changed files with 17 additions and 0 deletions
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3
zebra/redistribute.c
View file

@ -28,6 +28,7 @@
#include "zebra/zapi_msg.h" #include "zebra/zapi_msg.h"
#include "zebra/zebra_vxlan.h" #include "zebra/zebra_vxlan.h"
#include "zebra/zebra_errors.h" #include "zebra/zebra_errors.h"
#include "zebra/zebra_neigh.h"
#define ZEBRA_PTM_SUPPORT #define ZEBRA_PTM_SUPPORT
@ -522,6 +523,8 @@ void zebra_interface_down_update(struct interface *ifp)
zsend_interface_update(ZEBRA_INTERFACE_DOWN, client, ifp); zsend_interface_update(ZEBRA_INTERFACE_DOWN, client, ifp);
} }
zebra_neigh_del_all(ifp);
} }
/* Interface information update. */ /* Interface information update. */

13
zebra/zebra_neigh.c
View file

@ -152,6 +152,19 @@ void zebra_neigh_del(struct interface *ifp, struct ipaddr *ip)
zebra_neigh_free(n); zebra_neigh_free(n);
} }
/* kernel neigh delete all for a given interface */
void zebra_neigh_del_all(struct interface *ifp)
{
struct zebra_neigh_ent *n, *nn;
if (IS_ZEBRA_DEBUG_NEIGH)
zlog_debug("zebra neigh delete all for interface %s/%d",
ifp->name, ifp->ifindex);
RB_FOREACH_SAFE (n, zebra_neigh_rb_head, &zneigh_info->neigh_rb_tree, nn)
zebra_neigh_del(ifp, &n->ip);
}
/* kernel neigh add */ /* kernel neigh add */
void zebra_neigh_add(struct interface *ifp, struct ipaddr *ip, void zebra_neigh_add(struct interface *ifp, struct ipaddr *ip,
struct ethaddr *mac) struct ethaddr *mac)

1
zebra/zebra_neigh.h
View file

@ -43,6 +43,7 @@ struct zebra_neigh_info {
extern void zebra_neigh_add(struct interface *ifp, struct ipaddr *ip, extern void zebra_neigh_add(struct interface *ifp, struct ipaddr *ip,
struct ethaddr *mac); struct ethaddr *mac);
extern void zebra_neigh_del(struct interface *ifp, struct ipaddr *ip); extern void zebra_neigh_del(struct interface *ifp, struct ipaddr *ip);
extern void zebra_neigh_del_all(struct interface *ifp);
extern void zebra_neigh_show(struct vty *vty); extern void zebra_neigh_show(struct vty *vty);
extern void zebra_neigh_init(void); extern void zebra_neigh_init(void);
extern void zebra_neigh_terminate(void); extern void zebra_neigh_terminate(void);