blob: 21f6c868383433e2e44b24509d90bd49af1e7f85 (
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
|
/*
* Copyright 2013 Google Inc.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/*
* Author: ncardwell@google.com (Neal Cardwell)
*
* Interface for a module to allow iteration over TCP options in wire format.
*/
#ifndef __TCP_OPTIONS_ITERATOR_H__
#define __TCP_OPTIONS_ITERATOR_H__
#include "types.h"
#include "packet.h"
#include "tcp_options.h"
/* Internal state for an iterator for TCP options in wire format. */
struct tcp_options_iterator {
u8 *current_option;
u8 *options_end;
};
/* Initialize the iterator to iterate over the TCP options in the
* given packet. Return a pointer to the first option in the packet,
* or NULL if there are none.
*/
extern struct tcp_option *tcp_options_begin(
struct packet *packet,
struct tcp_options_iterator *iter);
/* Return a pointer to the next option in the packet, or NULL if there
* are no more. On failure returns NULL and sets error message.
*/
extern struct tcp_option *tcp_options_next(
struct tcp_options_iterator *iter, char **error);
#endif /* __TCP_OPTIONS_ITERATOR_H__ */
|