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
58
|
/*
* netutils.h - functions common to all the protocols
*
* Copyright (C) 1998-1999 Hugo Haas
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef NETUTILS_H
#define NETUTILS_H
#include "defines.h"
#include <netinet/ip.h>
#define HOST_LENGTH 512
#define DNS_EXPIRE 3600
#define MAX_IPHDR_LENGTH (((1 << 4) - 1) << 2)
/* Hashing parameters */
/* Open addressing, double hashing */
/* Hugo thanks Cormen, Leiserson & Rivest :-) */
#define TABLE_SIZE 257
#define LEVELS 3
#define HASH1(n) ((n) % TABLE_SIZE)
#define HASH2(n) (1 +((n) % (TABLE_SIZE - 2)))
/* Display whether IP options are specified */
#define IPOPTIONS(p) (((struct iphdr *) p)->ihl == 5) ? "" : " (IP opts)"
int host_lookup(char *host, __u32 in);
void initialize_dns_cache(void);
void host_print(char *hostname, __u32 in, int resolve);
void get_details(char *details,
const __u32 src_addr, const __u16 src_port,
const __u32 dst_addr, const __u16 dst_port);
void service_lookup(char *proto, char *service, __u16 port, int portresolve);
#endif
|
