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authorArnaldo Carvalho de Melo <acme@redhat.com>2007-03-12 20:09:15 -0300
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:25:07 -0700
commitc9bdd4b5257406b0608385d19c40b5511decf4f6 (patch)
treefe5319c322a11c0b00e7ef0473762a8d1961da83 /include/net/ip.h
parent0272ffc46f81a4bbbf302ba093c737e969c5bb55 (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 'include/net/ip.h')
-rw-r--r--include/net/ip.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/net/ip.h b/include/net/ip.h
index e79c3e3aa4f6..6f7ba32b199d 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -25,6 +25,7 @@
#include <linux/types.h>
#include <linux/ip.h>
#include <linux/in.h>
+#include <linux/skbuff.h>
#include <net/inet_sock.h>
#include <net/snmp.h>
@@ -43,6 +44,11 @@ struct inet_skb_parm
#define IPSKB_REROUTED 16
};
+static inline unsigned int ip_hdrlen(const struct sk_buff *skb)
+{
+ return skb->nh.iph->ihl * 4;
+}
+
struct ipcm_cookie
{
__be32 addr;
@@ -74,7 +80,6 @@ struct msghdr;
struct net_device;
struct packet_type;
struct rtable;
-struct sk_buff;
struct sockaddr;
extern void ip_mc_dropsocket(struct sock *);