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/* $FreeBSD$ */
/*
* Copyright (C) 1993-2001 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* Id: tcp_flags.c,v 1.8 2004/02/07 18:15:54 darrenr Exp
*/
#include "ipf.h"
extern char flagset[];
extern u_char flags[];
u_char tcp_flags(flgs, mask, linenum)
char *flgs;
u_char *mask;
int linenum;
{
u_char tcpf = 0, tcpfm = 0;
char *s;
s = strchr(flgs, '/');
if (s)
*s++ = '\0';
if (*flgs == '0') {
tcpf = strtol(flgs, NULL, 0);
} else {
tcpf = tcpflags(flgs);
}
if (s != NULL) {
if (*s == '0')
tcpfm = strtol(s, NULL, 0);
else
tcpfm = tcpflags(s);
}
if (!tcpfm) {
if (tcpf == TH_SYN)
tcpfm = 0xff & ~(TH_ECN|TH_CWR);
else
tcpfm = 0xff & ~(TH_ECN);
}
*mask = tcpfm;
return tcpf;
}
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