2 * Definitions of structures and routines for dissection of options that
3 * work like IPv4 or IPv6 options
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <gerald@wireshark.org>
9 * Copyright 1998 Gerald Combs
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
33 NO_LENGTH, /**< option has no data, hence no length */
34 FIXED_LENGTH, /**< option always has the same length */
35 VARIABLE_LENGTH /**< option is variable-length - optlen is minimum */
38 /** Member of table of IP or TCP options. */
39 typedef struct ip_tcp_opt {
40 int optcode; /**< code for option */
41 const char *name; /**< name of option */
42 int *subtree_index; /**< pointer to subtree index for option */
43 opt_len_type len_type; /**< type of option length field */
44 int optlen; /**< value length should be (minimum if VARIABLE) */
45 void (*dissect)(const struct ip_tcp_opt *,
50 proto_tree *); /**< routine to dissect option */
53 /** Routine to dissect options that work like IPv4 options, where the
54 length field in the option, if present, includes the type and
56 extern void dissect_ip_tcp_options(tvbuff_t *, int, guint,
57 const ip_tcp_opt *, int, int,
58 packet_info *, proto_tree *, proto_item *);
60 /** Routine to dissect options that work like IPv6 options, where the
61 length field in the option, if present, includes only the data, not
62 the type and length bytes. */
63 extern void dissect_ipv6_options(tvbuff_t *, int, guint,
64 const ip_tcp_opt *, int, int,
65 packet_info *, proto_tree *);