| Current Path : /usr/src/contrib/ipfilter/lib/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/contrib/ipfilter/lib/tcpflags.c |
/* $FreeBSD: release/9.1.0/contrib/ipfilter/lib/tcpflags.c 170268 2007-06-04 02:54:36Z darrenr $ */
/*
* Copyright (C) 2001-2002 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* $Id: tcpflags.c,v 1.3.4.1 2006/06/16 17:21:17 darrenr Exp $
*/
#include "ipf.h"
/*
* ECN is a new addition to TCP - RFC 2481
*/
#ifndef TH_ECN
# define TH_ECN 0x40
#endif
#ifndef TH_CWR
# define TH_CWR 0x80
#endif
extern char flagset[];
extern u_char flags[];
u_char tcpflags(flgs)
char *flgs;
{
u_char tcpf = 0;
char *s, *t;
for (s = flgs; *s; s++) {
if (*s == 'W')
tcpf |= TH_CWR;
else {
if (!(t = strchr(flagset, *s))) {
return 0;
}
tcpf |= flags[t - flagset];
}
}
return tcpf;
}