blob: 92d51624eadbb093d77217fa10aa017a577dc6fa (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/* $OpenBSD: util.c,v 1.3 2016/05/23 18:55:21 renato Exp $ */
/*
* Copyright (c) 2015 Renato Westphal <renato@openbsd.org>
* Copyright (c) 2012 Alexander Bluhm <bluhm@openbsd.org>
* Copyright (c) 2004 Esben Norby <norby@openbsd.org>
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <string.h>
#include "ldpd.h"
#include "log.h"
uint8_t
mask2prefixlen(in_addr_t ina)
{
if (ina == 0)
return (0);
else
return (33 - ffs(ntohl(ina)));
}
in_addr_t
prefixlen2mask(uint8_t prefixlen)
{
if (prefixlen == 0)
return (0);
return (htonl(0xffffffff << (32 - prefixlen)));
}
int
bad_ip_addr(struct in_addr addr)
{
uint32_t a = ntohl(addr.s_addr);
if (((a >> IN_CLASSA_NSHIFT) == 0) ||
((a >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) ||
IN_MULTICAST(a) || IN_BADCLASS(a))
return (1);
return (0);
}
|
