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ospf6d: fix FreeBSD IPv6 multicast group join race

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Avoid a IPv6 multicast group join race by delaying the group install
before processing all event queue.

Signed-off-by: Rafael Zalamena <rzalamena@opensourcerouting.org>
This commit is contained in:
Rafael Zalamena 2019-01-26 13:49:35 -02:00
parent f80003b0e1
commit bc482dc0ca
1 changed files with 16 additions and 0 deletions
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16
ospf6d/ospf6_interface.c
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@ -729,6 +729,22 @@ int interface_up(struct thread *thread)
return 0;
}
#ifdef __FreeBSD__
/*
* XXX: Schedule IPv6 group join for later, otherwise we might
* lose the multicast group registration caused by IPv6 group
* leave race.
*/
if (oi->sso_try_cnt == 0) {
oi->sso_try_cnt++;
zlog_info("Scheduling %s for sso", oi->interface->name);
thread_add_timer(master, interface_up, oi,
OSPF6_INTERFACE_SSO_RETRY_INT,
&oi->thread_sso);
return 0;
}
#endif /* __FreeBSD__ */
/* Join AllSPFRouters */
if (ospf6_sso(oi->interface->ifindex, &allspfrouters6, IPV6_JOIN_GROUP)
< 0) {