/*
 * Copyright (C) 1993-2001 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * $Id: addicmp.c,v 1.10.2.1 2004/12/09 19:41:16 darrenr Exp $
 */

#include <ctype.h>

#include "ipf.h"


char    *icmptypes[MAX_ICMPTYPE + 1] = {
        "echorep", (char *)NULL, (char *)NULL, "unreach", "squench",
        "redir", (char *)NULL, (char *)NULL, "echo", "routerad",
        "routersol", "timex", "paramprob", "timest", "timestrep",
        "inforeq", "inforep", "maskreq", "maskrep", "END"
};

/*
 * set the icmp field to the correct type if "icmp" word is found
 */
int     addicmp(cp, fp, linenum)
char    ***cp;
struct  frentry *fp;
int     linenum;
{
        char    **t;
        int     i;

        (*cp)++;
        if (!**cp)
                return -1;
        if (!fp->fr_proto)      /* to catch lusers */
                fp->fr_proto = IPPROTO_ICMP;
        if (ISDIGIT(***cp)) {
                if (!ratoi(**cp, &i, 0, 255)) {
                        fprintf(stderr,
                                "%d: Invalid icmp-type (%s) specified\n",
                                linenum, **cp);
                        return -1;
                }
        } else {
                for (t = icmptypes, i = 0; ; t++, i++) {
                        if (!*t)
                                continue;
                        if (!strcasecmp("END", *t)) {
                                i = -1;
                                break;
                        }
                        if (!strcasecmp(*t, **cp))
                                break;
                }
                if (i == -1) {
                        fprintf(stderr,
                                "%d: Unknown icmp-type (%s) specified\n",
                                linenum, **cp);
                        return -1;
                }
        }
        fp->fr_icmp = (u_short)(i << 8);
        fp->fr_icmpm = (u_short)0xff00;
        (*cp)++;
        if (!**cp)
                return 0;

        if (**cp && strcasecmp("code", **cp))
                return 0;
        (*cp)++;
        if (ISDIGIT(***cp)) {
                if (!ratoi(**cp, &i, 0, 255)) {
                        fprintf(stderr,
                                "%d: Invalid icmp code (%s) specified\n",
                                linenum, **cp);
                        return -1;
                }
        } else {
                i = icmpcode(**cp);
                if (i == -1) {
                        fprintf(stderr,
                                "%d: Unknown icmp code (%s) specified\n",
                                linenum, **cp);
                        return -1;
                }
        }
        i &= 0xff;
        fp->fr_icmp |= (u_short)i;
        fp->fr_icmpm = (u_short)0xffff;
        (*cp)++;
        return 0;
}