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

   1 /*
   2  * Copyright (C) 1993-2001 by Darren Reed.
   3  *
   4  * See the IPFILTER.LICENCE file for details on licencing.
   5  *
   6  * $Id: icmpcode.c,v 1.7.2.1 2004/12/09 19:41:20 darrenr Exp $
   7  */
   8
   9 #include <ctype.h>
  10
  11 #include "ipf.h"
  12
  13 #ifndef MIN
  14 # define        MIN(a,b)        ((a) > (b) ? (b) : (a))
  15 #endif
  16
  17
  18 char    *icmpcodes[MAX_ICMPCODE + 1] = {
  19         "net-unr", "host-unr", "proto-unr", "port-unr", "needfrag", "srcfail",
  20         "net-unk", "host-unk", "isolate", "net-prohib", "host-prohib",
  21         "net-tos", "host-tos", "filter-prohib", "host-preced", "preced-cutoff",
  22         NULL };
  23
  24 /*
  25  * Return the number for the associated ICMP unreachable code.
  26  */
  27 int icmpcode(str)
  28 char *str;
  29 {
  30         char    *s;
  31         int     i, len;
  32
  33         if ((s = strrchr(str, ')')))
  34                 *s = '\0';
  35         if (ISDIGIT(*str)) {
  36                 if (!ratoi(str, &i, 0, 255))
  37                         return -1;
  38                 else
  39                         return i;
  40         }
  41         len = strlen(str);
  42         for (i = 0; icmpcodes[i]; i++)
  43                 if (!strncasecmp(str, icmpcodes[i], MIN(len,
  44                                  strlen(icmpcodes[i])) ))
  45                         return i;
  46         return -1;
  47 }