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[TCP]: Introduce tcp_hdrlen() and tcp_optlen()

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The ip_hdrlen() buddy, created to reduce the number of skb->h.th-> uses and to
avoid the longer, open coded equivalent.

Ditched a no-op in bnx2 in the process.

I wonder if we should have a BUG_ON(skb->h.th->doff < 5) in tcp_optlen()...

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2007-03-18 17:43:48 -07:00 • committed by David S. Miller
parent 88c7664f13
commit ab6a5bb6b2
14 changed files with 32 additions and 26 deletions
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10
include/linux/tcp.h
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@ -178,6 +178,16 @@ struct tcp_md5sig {
#include <net/inet_connection_sock.h>
#include <net/inet_timewait_sock.h>
static inline unsigned int tcp_hdrlen(const struct sk_buff *skb)
{
return skb->h.th->doff * 4;
}
static inline unsigned int tcp_optlen(const struct sk_buff *skb)
{
return (skb->h.th->doff - 5) * 4;
}
/* This defines a selective acknowledgement block. */
struct tcp_sack_block_wire {
__be32 start_seq;