forked from osmocom/wireshark
0aebd579e3
number of SACK ranges found in the SACK option. This involved extending the IP options framework to include an extra void* data field, which in the case of TCP is filled in with the tap struct - other users currently pass NULL. I first implemented the graph to sort the SACK ranges and show (in red) the unacknowledged regions between them, but this became confusing where the number of ranges is limited by TCP padding bytes. i.e. you can't tell how many SACKs could have been encoded, so some of the gaps between ranges may already have been received. svn path=/trunk/; revision=46006
72 lines
2.6 KiB
C
72 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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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OPT_LEN_NO_LENGTH, /**< option has no data, hence no length */
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OPT_LEN_FIXED_LENGTH, /**< option always has the same length */
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OPT_LEN_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 *,
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void *); /**< 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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void *);
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/* Quick-Start option, as defined by RFC4782 */
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#define QS_FUNC_MASK 0xf0
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#define QS_RATE_MASK 0x0f
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#define QS_RATE_REQUEST 0
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#define QS_RATE_REPORT 8
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WS_VAR_IMPORT const value_string qs_func_vals[];
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WS_VAR_IMPORT value_string_ext qs_rate_vals_ext;
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#endif
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