2 * Definitions of structures and routines for dissection of options that
3 * work like IPv4 or IPv6 options
7 * Ethereal - Network traffic analyzer
8 * By Gerald Combs <gerald@ethereal.com>
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.
30 NO_LENGTH, /* option has no data, hence no length */
31 FIXED_LENGTH, /* option always has the same length */
32 VARIABLE_LENGTH /* option is variable-length - optlen is minimum */
35 /* Member of table of IP or TCP options. */
36 typedef struct ip_tcp_opt {
37 int optcode; /* code for option */
38 char *name; /* name of option */
39 int *subtree_index; /* pointer to subtree index for option */
40 opt_len_type len_type; /* type of option length field */
41 int optlen; /* value length should be (minimum if VARIABLE) */
42 void (*dissect)(const struct ip_tcp_opt *, tvbuff_t *, int, guint,
43 packet_info *, proto_tree *);
44 /* routine to dissect option */
47 /* Routine to dissect options that work like IPv4 options, where the
48 length field in the option, if present, includes the type and
50 extern void dissect_ip_tcp_options(tvbuff_t *, int, guint,
51 const ip_tcp_opt *, int, int, packet_info *, proto_tree *);
53 /* Routine to dissect options that work like IPv6 options, where the
54 length field in the option, if present, includes only the data, not
55 the type and length bytes. */
56 extern void dissect_ipv6_options(tvbuff_t *, int, guint,
57 const ip_tcp_opt *, int, int, packet_info *, proto_tree *);