/*
 * Copyright (C) 1993-2001 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * $Id: ports.c,v 1.9.4.1 2004/12/09 19:41:22 darrenr Exp $
 */

#include <ctype.h>

#include "ipf.h"


/*
 * check for possible presence of the port fields in the line
 */
int     ports(seg, proto, pp, cp, tp, linenum)
char    ***seg;
char    *proto;
u_short *pp;
int     *cp;
u_short *tp;
int     linenum;
{
        int     comp = -1;

        if (!*seg || !**seg || !***seg)
                return 0;
        if (!strcasecmp(**seg, "port") && *(*seg + 1) && *(*seg + 2)) {
                (*seg)++;
                if (ISALNUM(***seg) && *(*seg + 2)) {
                        if (portnum(**seg, proto, pp, linenum) == 0)
                                return -1;
                        (*seg)++;
                        if (!strcmp(**seg, "<>"))
                                comp = FR_OUTRANGE;
                        else if (!strcmp(**seg, "><"))
                                comp = FR_INRANGE;
                        else {
                                fprintf(stderr,
                                        "%d: unknown range operator (%s)\n",
                                        linenum, **seg);
                                return -1;
                        }
                        (*seg)++;
                        if (**seg == NULL) {
                                fprintf(stderr, "%d: missing 2nd port value\n",
                                        linenum);
                                return -1;
                        }
                        if (portnum(**seg, proto, tp, linenum) == 0)
                                return -1;
                } else if (!strcmp(**seg, "=") || !strcasecmp(**seg, "eq"))
                        comp = FR_EQUAL;
                else if (!strcmp(**seg, "!=") || !strcasecmp(**seg, "ne"))
                        comp = FR_NEQUAL;
                else if (!strcmp(**seg, "<") || !strcasecmp(**seg, "lt"))
                        comp = FR_LESST;
                else if (!strcmp(**seg, ">") || !strcasecmp(**seg, "gt"))
                        comp = FR_GREATERT;
                else if (!strcmp(**seg, "<=") || !strcasecmp(**seg, "le"))
                        comp = FR_LESSTE;
                else if (!strcmp(**seg, ">=") || !strcasecmp(**seg, "ge"))
                        comp = FR_GREATERTE;
                else {
                        fprintf(stderr, "%d: unknown comparator (%s)\n",
                                        linenum, **seg);
                        return -1;
                }
                if (comp != FR_OUTRANGE && comp != FR_INRANGE) {
                        (*seg)++;
                        if (portnum(**seg, proto, pp, linenum) == 0)
                                return -1;
                }
                *cp = comp;
                (*seg)++;
        }
        return 0;
}