xref: /illumos-gate/usr/src/cmd/ipf/lib/common/addicmp.c (revision ab25eeb5)
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", (char *)NULL, (char *)NULL, "unreach", "squench",
16 	"redir", (char *)NULL, (char *)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  */
addicmp(cp,fp,linenum)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 }
93