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Commit d9b3fca2 authored by Craig Gallek's avatar Craig Gallek Committed by David S. Miller
Browse files

tcp: __tcp_hdrlen() helper 



tcp_hdrlen is wasteful if you already have a pointer to struct tcphdr.
This splits the size calculation into a helper function that can be
used if a struct tcphdr is already available.

Signed-off-by: default avatarCraig Gallek <kraig@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 496611d7

include/linux/tcp.h

+6 −1
Original line number Diff line number Diff line
@@ -29,9 +29,14 @@ static inline struct tcphdr *tcp_hdr(const struct sk_buff *skb) 
	return (struct tcphdr *)skb_transport_header(skb);

}



static inline unsigned int __tcp_hdrlen(const struct tcphdr *th)

{

	return th->doff * 4;

}



static inline unsigned int tcp_hdrlen(const struct sk_buff *skb)

{

	return tcp_hdr(skb)->doff * 4;

	return __tcp_hdrlen(tcp_hdr(skb));

}



static inline struct tcphdr *inner_tcp_hdr(const struct sk_buff *skb)