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[XFRM]: beet: use IPOPT_NOP for option padding

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draft-nikander-esp-beet-mode-07.txt states "The padding MUST be filled
with NOP options as defined in Internet Protocol [1] section 3.1
Internet header format.", so do that.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-04-05 15:54:39 -07:00 committed by David S. Miller
parent c5027c9a89
commit 04fef9893a
1 changed files with 2 additions and 0 deletions
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2
net/ipv4/xfrm4_mode_beet.c
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@ -54,6 +54,8 @@ static int xfrm4_beet_output(struct xfrm_state *x, struct sk_buff *skb)
ph->padlen = 4 - (optlen & 4);
ph->hdrlen = (optlen + ph->padlen + sizeof(*ph)) / 8;
ph->nexthdr = top_iph->protocol;
if (ph->padlen)
memset(ph + 1, IPOPT_NOP, ph->padlen);
top_iph->protocol = IPPROTO_BEETPH;
top_iph->ihl = sizeof(struct iphdr) / 4;