usr/src/cmd/ipf/lib/common/addicmp.c

   1 /*
   2  * Copyright (C) 1993-2001 by Darren Reed.
   3  *
   4  * See the IPFILTER.LICENCE file for details on licencing.
   5  *
   6  * $Id: addicmp.c,v 1.10.2.1 2004/12/09 19:41:16 darrenr Exp $
   7  */
   8
   9 #include <ctype.h>
  10
  11 #include "ipf.h"
  12
  13
  14 char    *icmptypes[MAX_ICMPTYPE + 1] = {
  15         "echorep", NULL, NULL, "unreach", "squench",
  16         "redir", NULL, NULL, "echo", "routerad",
  17         "routersol", "timex", "paramprob", "timest", "timestrep",
  18         "inforeq", "inforep", "maskreq", "maskrep", "END"
  19 };
  20
  21 /*
  22  * set the icmp field to the correct type if "icmp" word is found
  23  */
  24 int     addicmp(cp, fp, linenum)
  25 char    ***cp;
  26 struct  frentry *fp;
  27 int     linenum;
  28 {
  29         char    **t;
  30         int     i;
  31
  32         (*cp)++;
  33         if (!**cp)
  34                 return -1;
  35         if (!fp->fr_proto)      /* to catch lusers */
  36                 fp->fr_proto = IPPROTO_ICMP;
  37         if (ISDIGIT(***cp)) {
  38                 if (!ratoi(**cp, &i, 0, 255)) {
  39                         fprintf(stderr,
  40                                 "%d: Invalid icmp-type (%s) specified\n",
  41                                 linenum, **cp);
  42                         return -1;
  43                 }
  44         } else {
  45                 for (t = icmptypes, i = 0; ; t++, i++) {
  46                         if (!*t)
  47                                 continue;
  48                         if (!strcasecmp("END", *t)) {
  49                                 i = -1;
  50                                 break;
  51                         }
  52                         if (!strcasecmp(*t, **cp))
  53                                 break;
  54                 }
  55                 if (i == -1) {
  56                         fprintf(stderr,
  57                                 "%d: Unknown icmp-type (%s) specified\n",
  58                                 linenum, **cp);
  59                         return -1;
  60                 }
  61         }
  62         fp->fr_icmp = (u_short)(i << 8);
  63         fp->fr_icmpm = (u_short)0xff00;
  64         (*cp)++;
  65         if (!**cp)
  66                 return 0;
  67
  68         if (**cp && strcasecmp("code", **cp))
  69                 return 0;
  70         (*cp)++;
  71         if (ISDIGIT(***cp)) {
  72                 if (!ratoi(**cp, &i, 0, 255)) {
  73                         fprintf(stderr,
  74                                 "%d: Invalid icmp code (%s) specified\n",
  75                                 linenum, **cp);
  76                         return -1;
  77                 }
  78         } else {
  79                 i = icmpcode(**cp);
  80                 if (i == -1) {
  81                         fprintf(stderr,
  82                                 "%d: Unknown icmp code (%s) specified\n",
  83                                 linenum, **cp);
  84                         return -1;
  85                 }
  86         }
  87         i &= 0xff;
  88         fp->fr_icmp |= (u_short)i;
  89         fp->fr_icmpm = (u_short)0xffff;
  90         (*cp)++;
  91         return 0;
  92 }