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/*
* Copyright (C) 2012 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* $Id$
*/
#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
#ifndef TH_AE
# define TH_AE 0x100
#endif
extern char flagset[];
extern uint16_t flags[];
uint16_t tcpflags(char *flgs)
{
uint16_t 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);
}
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