netdev - Re: [PATCH] tcp: unify tcp flag macros

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Date:	Sat, 12 Jun 2010 10:18:12 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	Changli Gao <xiaosuo@...il.com>
cc:	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	"Pekka Savola (ipv6)" <pekkas@...core.fi>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org
Subject: Re: [PATCH] tcp: unify tcp flag macros


On Saturday 2010-06-12 07:59, Changli Gao wrote:
>--- a/include/net/tcp.h
>+++ b/include/net/tcp.h
>@@ -602,6 +602,17 @@ extern u32	__tcp_select_window(struct sock *sk);
>  */
> #define tcp_time_stamp		((__u32)(jiffies))
> 
>+#define tcp_flag_byte(th) (((u_int8_t *)th)[13])
>+
>+#define	TH_FIN	0x01
>+#define	TH_SYN	0x02
>+#define	TH_RST	0x04
>+#define	TH_PUSH	0x08
>+#define	TH_ACK	0x10
>+#define	TH_URG	0x20
>+#define	TH_ECE	0x40
>+#define	TH_CWR	0x80

I'd prefer something less generic, like TCPHDR_{FIN,SYN,etc}.

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