/*
 * Copyright (C) 1993-2001 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * $Id: icmpcode.c,v 1.7.2.1 2004/12/09 19:41:20 darrenr Exp $
 */

#include <ctype.h>

#include "ipf.h"

#ifndef MIN
# define        MIN(a,b)        ((a) > (b) ? (b) : (a))
#endif


char    *icmpcodes[MAX_ICMPCODE + 1] = {
        "net-unr", "host-unr", "proto-unr", "port-unr", "needfrag", "srcfail",
        "net-unk", "host-unk", "isolate", "net-prohib", "host-prohib",
        "net-tos", "host-tos", "filter-prohib", "host-preced", "preced-cutoff",
        NULL };

/*
 * Return the number for the associated ICMP unreachable code.
 */
int icmpcode(str)
char *str;
{
        char    *s;
        int     i, len;

        if ((s = strrchr(str, ')')))
                *s = '\0';
        if (ISDIGIT(*str)) {
                if (!ratoi(str, &i, 0, 255))
                        return -1;
                else
                        return i;
        }
        len = strlen(str);
        for (i = 0; icmpcodes[i]; i++)
                if (!strncasecmp(str, icmpcodes[i], MIN(len,
                                 strlen(icmpcodes[i])) ))
                        return i;
        return -1;
}