contrib/ipfilter/lib/ports.c

   1 /*      $FreeBSD$       */
   2
   3 /*
   4  * Copyright (C) 1993-2001 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * $Id: ports.c,v 1.9.4.1 2004/12/09 19:41:22 darrenr Exp $
   9  */
  10
  11 #include <ctype.h>
  12
  13 #include "ipf.h"
  14
  15
  16 /*
  17  * check for possible presence of the port fields in the line
  18  */
  19 int     ports(seg, proto, pp, cp, tp, linenum)
  20 char    ***seg;
  21 char    *proto;
  22 u_short *pp;
  23 int     *cp;
  24 u_short *tp;
  25 int     linenum;
  26 {
  27         int     comp = -1;
  28
  29         if (!*seg || !**seg || !***seg)
  30                 return 0;
  31         if (!strcasecmp(**seg, "port") && *(*seg + 1) && *(*seg + 2)) {
  32                 (*seg)++;
  33                 if (ISALNUM(***seg) && *(*seg + 2)) {
  34                         if (portnum(**seg, proto, pp, linenum) == 0)
  35                                 return -1;
  36                         (*seg)++;
  37                         if (!strcmp(**seg, "<>"))
  38                                 comp = FR_OUTRANGE;
  39                         else if (!strcmp(**seg, "><"))
  40                                 comp = FR_INRANGE;
  41                         else {
  42                                 fprintf(stderr,
  43                                         "%d: unknown range operator (%s)\n",
  44                                         linenum, **seg);
  45                                 return -1;
  46                         }
  47                         (*seg)++;
  48                         if (**seg == NULL) {
  49                                 fprintf(stderr, "%d: missing 2nd port value\n",
  50                                         linenum);
  51                                 return -1;
  52                         }
  53                         if (portnum(**seg, proto, tp, linenum) == 0)
  54                                 return -1;
  55                 } else if (!strcmp(**seg, "=") || !strcasecmp(**seg, "eq"))
  56                         comp = FR_EQUAL;
  57                 else if (!strcmp(**seg, "!=") || !strcasecmp(**seg, "ne"))
  58                         comp = FR_NEQUAL;
  59                 else if (!strcmp(**seg, "<") || !strcasecmp(**seg, "lt"))
  60                         comp = FR_LESST;
  61                 else if (!strcmp(**seg, ">") || !strcasecmp(**seg, "gt"))
  62                         comp = FR_GREATERT;
  63                 else if (!strcmp(**seg, "<=") || !strcasecmp(**seg, "le"))
  64                         comp = FR_LESSTE;
  65                 else if (!strcmp(**seg, ">=") || !strcasecmp(**seg, "ge"))
  66                         comp = FR_GREATERTE;
  67                 else {
  68                         fprintf(stderr, "%d: unknown comparator (%s)\n",
  69                                         linenum, **seg);
  70                         return -1;
  71                 }
  72                 if (comp != FR_OUTRANGE && comp != FR_INRANGE) {
  73                         (*seg)++;
  74                         if (portnum(**seg, proto, pp, linenum) == 0)
  75                                 return -1;
  76                 }
  77                 *cp = comp;
  78                 (*seg)++;
  79         }
  80         return 0;
  81 }