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 */
ports(seg,proto,pp,cp,tp,linenum)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 }
80