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xt_quota2: fix 2 bugs when not in grow mode

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Cherry-pick commit v2.3-5-gc6c70ab.

1. XT_QUOTA_NO_CHANGE should not alter quota to zero ever
2. XT_QUOTA_PACKET should not be set to zero based on skb->len

Signed-off-by: Sam Liddicott <sam@liddicott.com>
This commit is contained in:
Sam Liddicott
2014-01-07 09:11:07 -08:00
committed by Jan Engelhardt
parent b78a309bcc
commit 7fcbbe7dee
1 changed files with 3 additions and 2 deletions
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5
extensions/xt_quota2.c
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@@ -209,13 +209,14 @@ quota_mt2(const struct sk_buff *skb, struct xt_action_param *par)
}
ret = true;
} else {
if (e->quota >= skb->len) {
if (e->quota >= ((q->flags & XT_QUOTA_PACKET) ? 1 : skb->len)) {
if (!(q->flags & XT_QUOTA_NO_CHANGE))
e->quota -= (q->flags & XT_QUOTA_PACKET) ? 1 : skb->len;
ret = !ret;
} else {
/* we do not allow even small packets from now on */
e->quota = 0;
if (!(q->flags & XT_QUOTA_NO_CHANGE))
e->quota = 0;
}
q->quota = e->quota;
}