51 lines
817 B
C
51 lines
817 B
C
/* $NetBSD: tcp_flags.c,v 1.1.1.1 2004/03/28 08:56:21 martti Exp $ */
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/*
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* Copyright (C) 1993-2001 by Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*
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* Id: tcp_flags.c,v 1.8 2004/02/07 18:15:54 darrenr Exp
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*/
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#include "ipf.h"
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extern char flagset[];
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extern u_char flags[];
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u_char tcp_flags(flgs, mask, linenum)
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char *flgs;
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u_char *mask;
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int linenum;
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{
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u_char tcpf = 0, tcpfm = 0;
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char *s;
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s = strchr(flgs, '/');
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if (s)
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*s++ = '\0';
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if (*flgs == '0') {
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tcpf = strtol(flgs, NULL, 0);
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} else {
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tcpf = tcpflags(flgs);
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}
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if (s != NULL) {
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if (*s == '0')
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tcpfm = strtol(s, NULL, 0);
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else
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tcpfm = tcpflags(s);
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}
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if (!tcpfm) {
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if (tcpf == TH_SYN)
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tcpfm = 0xff & ~(TH_ECN|TH_CWR);
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else
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tcpfm = 0xff & ~(TH_ECN);
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}
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*mask = tcpfm;
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return tcpf;
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}
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