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nhrp: fix race condition

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where null lladdr recieved from zebra before nhrp next hop
	is installed.

Signed-off-by: Lou Berger <lberger@labn.net>
This commit is contained in:
Lou Berger 2024-02-06 23:14:07 +00:00
parent 1bc2fa3584
commit 5d9ebe6181
1 changed files with 5 additions and 0 deletions
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5
nhrpd/netlink_arp.c
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@ -191,6 +191,11 @@ int nhrp_neighbor_operation(ZAPI_CALLBACK_ARGS)
"Netlink: update binding for %pSU dev %s from c %pSU peer.vc.nbma %pSU to lladdr %pSU",
&addr, ifp->name, &c->cur.remote_nbma_natoa,
&c->cur.peer->vc->remote.nbma, &lladdr);
if (lladdr.sa.sa_family == AF_UNSPEC)
/* nothing from zebra, so use nhrp peer */
lladdr = c->cur.peer->vc->remote.nbma;
/* In case of shortcuts, nbma is given by lladdr, not
* vc->remote.nbma.
*/