68 lines
2.6 KiB
C
68 lines
2.6 KiB
C
/* ip_opts.h
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* Definitions of structures and routines for dissection of options that
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* work like IPv4 or IPv6 options
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __IP_OPTS_H__
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#define __IP_OPTS_H__
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/** @file
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*/
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typedef enum {
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NO_LENGTH, /**< option has no data, hence no length */
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FIXED_LENGTH, /**< option always has the same length */
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VARIABLE_LENGTH /**< option is variable-length - optlen is minimum */
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} opt_len_type;
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/** Member of table of IP or TCP options. */
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typedef struct ip_tcp_opt {
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int optcode; /**< code for option */
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const char *name; /**< name of option */
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int *subtree_index; /**< pointer to subtree index for option */
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opt_len_type len_type; /**< type of option length field */
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int optlen; /**< value length should be (minimum if VARIABLE) */
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void (*dissect)(const struct ip_tcp_opt *,
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tvbuff_t *,
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int,
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guint,
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packet_info *,
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proto_tree *); /**< routine to dissect option */
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} ip_tcp_opt;
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/** Routine to dissect options that work like IPv4 options, where the
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length field in the option, if present, includes the type and
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length bytes. */
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extern void dissect_ip_tcp_options(tvbuff_t *, int, guint,
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const ip_tcp_opt *, int, int,
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packet_info *, proto_tree *, proto_item *);
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/** Routine to dissect options that work like IPv6 options, where the
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length field in the option, if present, includes only the data, not
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the type and length bytes. */
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extern void dissect_ipv6_options(tvbuff_t *, int, guint,
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const ip_tcp_opt *, int, int,
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packet_info *, proto_tree *);
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#endif
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