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net: ipv6: mld: similarly to MLDv2 have min max_delay of 1 

Similarly as we do in MLDv2 queries, set a forged MLDv1 query with
0 ms mld_maxdelay to minimum timer shot time of 1 jiffies. This is
eventually done in igmp6_group_queried() anyway, so we can simplify
a check there.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2013-09-04 00:19:41 +02:00 committed by David S. Miller
parent 58c0ecfd8d
commit cc7f7ab758
1 changed files with 7 additions and 7 deletions
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14
net/ipv6/mcast.c
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@ -1040,12 +1040,9 @@ static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
delay = ma->mca_timer.expires - jiffies;
}
if (delay >= resptime) {
if (resptime)
delay = net_random() % resptime;
else
delay = 1;
}
if (delay >= resptime)
delay = net_random() % resptime;
ma->mca_timer.expires = jiffies + delay;
if (!mod_timer(&ma->mca_timer, jiffies + delay))
atomic_inc(&ma->mca_refcnt);
@ -1258,12 +1255,15 @@ int igmp6_event_query(struct sk_buff *skb)
return -EINVAL;
if (len == MLD_V1_QUERY_LEN) {
unsigned long mldv1_md;
/* Ignore v1 queries */
if (mld_in_v2_mode_only(idev))
return 0;
/* MLDv1 router present */
max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
mldv1_md = ntohs(mld->mld_maxdelay);
max_delay = max(msecs_to_jiffies(mldv1_md), 1UL);
mld_set_v1_mode(idev);