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/nf_nat_standalone.c | |
| parent | 0272ffc46f81a4bbbf302ba093c737e969c5bb55 (diff) | |
[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/nf_nat_standalone.c')
| -rw-r--r-- | net/ipv4/netfilter/nf_nat_standalone.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/net/ipv4/netfilter/nf_nat_standalone.c b/net/ipv4/netfilter/nf_nat_standalone.c index 15aa3db8cb3..61ca272165a 100644 --- a/net/ipv4/netfilter/nf_nat_standalone.c +++ b/net/ipv4/netfilter/nf_nat_standalone.c @@ -101,8 +101,7 @@ nf_nat_fn(unsigned int hooknum, if ((*pskb)->nh.iph->protocol == IPPROTO_ICMP) { struct icmphdr _hdr, *hp; - hp = skb_header_pointer(*pskb, - (*pskb)->nh.iph->ihl*4, + hp = skb_header_pointer(*pskb, ip_hdrlen(*pskb), sizeof(_hdr), &_hdr); if (hp != NULL && hp->type == ICMP_REDIRECT) @@ -203,7 +202,7 @@ nf_nat_out(unsigned int hooknum, /* 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)) return NF_ACCEPT; ret = nf_nat_fn(hooknum, pskb, in, out, okfn); @@ -236,7 +235,7 @@ nf_nat_local_fn(unsigned int hooknum, /* 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)) return NF_ACCEPT; ret = nf_nat_fn(hooknum, pskb, in, out, okfn); |