suricata
util-cidr.c
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1 /* Copyright (C) 2007-2010 Open Information Security Foundation
2  *
3  * You can copy, redistribute or modify this Program under the terms of
4  * the GNU General Public License version 2 as published by the Free
5  * Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * version 2 along with this program; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15  * 02110-1301, USA.
16  */
17 
18 /**
19  * \file
20  *
21  * \author Victor Julien <victor@inliniac.net>
22  *
23  * CIDR utility functions
24  */
25 
26 #include "suricata-common.h"
27 #include "util-cidr.h"
28 
29 static uint32_t cidrs[33];
30 
31 void CIDRInit(void)
32 {
33  int i = 0;
34 
35  /* skip 0 as it will result in 0xffffffff */
36  cidrs[0] = 0;
37  for (i = 1; i < 33; i++) {
38  cidrs[i] = htonl(0xFFFFFFFF << (32 - i));
39  //printf("CIDRInit: cidrs[%02d] = 0x%08X\n", i, cidrs[i]);
40  }
41 }
42 
43 uint32_t CIDRGet(int cidr)
44 {
45  if (cidr < 0 || cidr > 32)
46  return 0;
47  return cidrs[cidr];
48 }
49 
void CIDRInit(void)
Definition: util-cidr.c:31
uint32_t CIDRGet(int cidr)
Definition: util-cidr.c:43