diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2007-03-12 20:09:15 -0300 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-25 22:25:07 -0700 |
| commit | c9bdd4b5257406b0608385d19c40b5511decf4f6 (patch) | |
| tree | fe5319c322a11c0b00e7ef0473762a8d1961da83 /net/ipv4/netfilter/iptable_mangle.c | |
| parent | 0272ffc46f81a4bbbf302ba093c737e969c5bb55 (diff) | |
| download | linux-c9bdd4b5257406b0608385d19c40b5511decf4f6.tar.gz | |
[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 <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/netfilter/iptable_mangle.c')
| -rw-r--r-- | net/ipv4/netfilter/iptable_mangle.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/netfilter/iptable_mangle.c b/net/ipv4/netfilter/iptable_mangle.c index 98b66ef0c714b..6cc3245f676af 100644 --- a/net/ipv4/netfilter/iptable_mangle.c +++ b/net/ipv4/netfilter/iptable_mangle.c @@ -17,6 +17,7 @@ #include <net/sock.h> #include <net/route.h> #include <linux/ip.h> +#include <net/ip.h> MODULE_LICENSE("GPL"); MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>"); @@ -136,7 +137,7 @@ ipt_local_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; |