From c9bdd4b5257406b0608385d19c40b5511decf4f6 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 12 Mar 2007 20:09:15 -0300 Subject: [IP]: Introduce ip_hdrlen() For the common sequence "skb->nh.iph->ihl * 4", removing a good number of open coded skb->nh.iph uses, now to go after the rest... Just out of curiosity, here are the idioms found to get the same result: skb->nh.iph->ihl << 2 skb->nh.iph->ihl<<2 skb->nh.iph->ihl * 4 skb->nh.iph->ihl*4 (skb->nh.iph)->ihl * sizeof(u32) Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- net/ipv4/netfilter/iptable_filter.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/ipv4/netfilter/iptable_filter.c') diff --git a/net/ipv4/netfilter/iptable_filter.c b/net/ipv4/netfilter/iptable_filter.c index d1d61e97b976..42728909eba0 100644 --- a/net/ipv4/netfilter/iptable_filter.c +++ b/net/ipv4/netfilter/iptable_filter.c @@ -13,6 +13,7 @@ #include #include #include +#include MODULE_LICENSE("GPL"); MODULE_AUTHOR("Netfilter Core Team "); @@ -102,7 +103,7 @@ ipt_local_out_hook(unsigned int hook, { /* root is playing with raw sockets. */ if ((*pskb)->len < sizeof(struct iphdr) - || (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr)) { + || ip_hdrlen(*pskb) < sizeof(struct iphdr)) { if (net_ratelimit()) printk("ipt_hook: happy cracking.\n"); return NF_ACCEPT; -- cgit v1.2.3