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

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