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wireshark/plugins/docsis/packet-map.c
Lars Roland 00273300e7 Preparations for dropping the old plugin api. 
Introduce a new init routine for plugins, 
which does not take the plugin api table as an 
argument and allows etheral to distinguish 
between plugins using the old and the new api.

Update README.plugins accordingly

Change all g_warnings() in epan/plugins.c to report_failue().
On windows we do not have a log console open while
loading the plugins, because a log console cannot be opened before the prefs have been read. Thus g_warnings()
does not work for reporting problems with plugins.

svn path=/trunk/; revision=13596
2005-03-05 06:28:10 +00:00

298 lines
8.7 KiB
C
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/* packet-map.c
* Routines for MAP Message dissection
* Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "moduleinfo.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gmodule.h>
#include <epan/packet.h>
#define IUC_REQUEST 1
#define IUC_REQ_DATA 2
#define IUC_INIT_MAINT 3
#define IUC_STATION_MAINT 4
#define IUC_SHORT_DATA_GRANT 5
#define IUC_LONG_DATA_GRANT 6
#define IUC_NULL_IE 7
#define IUC_DATA_ACK 8
#define IUC_RESERVED9 9
#define IUC_RESERVED10 10
#define IUC_RESERVED11 11
#define IUC_RESERVED12 12
#define IUC_RESERVED13 13
#define IUC_RESERVED14 14
#define IUC_EXPANSION 15
/* Initialize the protocol and registered fields */
static int proto_docsis_map = -1;
static int hf_docsis_map_upstream_chid = -1;
static int hf_docsis_map_ucd_count = -1;
static int hf_docsis_map_numie = -1;
static int hf_docsis_map = -1;
static int hf_docsis_map_alloc_start = -1;
static int hf_docsis_map_ack_time = -1;
static int hf_docsis_map_rng_start = -1;
static int hf_docsis_map_rng_end = -1;
static int hf_docsis_map_data_start = -1;
static int hf_docsis_map_data_end = -1;
static int hf_docsis_map_ie = -1;
static int hf_docsis_map_rsvd = -1;
static int hf_docsis_map_sid = -1;
static int hf_docsis_map_iuc = -1;
static int hf_docsis_map_offset = -1;
/* Initialize the subtree pointers */
static gint ett_docsis_map = -1;
/* Defined in packet-ucd.c */
extern value_string iuc_vals[];
/* Code to actually dissect the packets */
static void
dissect_map (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
guint8 i, numie;
int pos;
guint16 sid;
guint8 iuc;
guint16 offset;
guint32 ie, temp, mask;
proto_item *it;
proto_tree *map_tree;
guint8 upchid, ucd_count;
numie = tvb_get_guint8 (tvb, 2);
upchid = tvb_get_guint8 (tvb, 0);
ucd_count = tvb_get_guint8 (tvb, 1);
if (check_col (pinfo->cinfo, COL_INFO))
{
col_clear (pinfo->cinfo, COL_INFO);
if (upchid > 0)
col_add_fstr (pinfo->cinfo, COL_INFO,
"Map Message: Channel ID = %u (U%u), UCD Count = %u, # IE's = %u",
upchid, upchid - 1, ucd_count, numie);
else
col_add_fstr (pinfo->cinfo, COL_INFO,
"Map Message: Channel ID = %u (Telephony Return), UCD Count = %u, # IE's = %u",
upchid, ucd_count, numie);
}
if (tree)
{
it =
proto_tree_add_protocol_format (tree, proto_docsis_map, tvb, 0, -1,
"MAP Message");
map_tree = proto_item_add_subtree (it, ett_docsis_map);
proto_tree_add_item (map_tree, hf_docsis_map_upstream_chid, tvb, 0, 1,
FALSE);
proto_tree_add_item (map_tree, hf_docsis_map_ucd_count, tvb, 1, 1,
FALSE);
proto_tree_add_item (map_tree, hf_docsis_map_numie, tvb, 2, 1, FALSE);
proto_tree_add_item (map_tree, hf_docsis_map_rsvd, tvb, 3, 1, FALSE);
proto_tree_add_item (map_tree, hf_docsis_map_alloc_start, tvb, 4, 4,
FALSE);
proto_tree_add_item (map_tree, hf_docsis_map_ack_time, tvb, 8, 4,
FALSE);
proto_tree_add_item (map_tree, hf_docsis_map_rng_start, tvb, 12, 1,
FALSE);
proto_tree_add_item (map_tree, hf_docsis_map_rng_end, tvb, 13, 1,
FALSE);
proto_tree_add_item (map_tree, hf_docsis_map_data_start, tvb, 14, 1,
FALSE);
proto_tree_add_item (map_tree, hf_docsis_map_data_end, tvb, 15, 1,
FALSE);
pos = 16;
for (i = 0; i < numie; i++)
{
ie = tvb_get_ntohl (tvb, pos);
mask = 0xFFFC0000;
temp = (ie & mask);
temp = temp >> 18;
sid = (guint16) (temp & 0x3FFF);
mask = 0x3C000;
temp = (ie & mask);
temp = temp >> 14;
iuc = (guint8) (temp & 0x0F);
mask = 0x3FFF;
offset = (guint16) (ie & mask);
proto_tree_add_item_hidden(map_tree, hf_docsis_map_sid, tvb, pos, 4, FALSE);
proto_tree_add_item_hidden(map_tree, hf_docsis_map_iuc, tvb, pos, 4, FALSE);
proto_tree_add_item_hidden(map_tree, hf_docsis_map_offset, tvb, pos, 4, FALSE);
if (sid == 0x3FFF)
proto_tree_add_uint_format (map_tree, hf_docsis_map_ie, tvb, pos, 4,
ie, "SID = 0x%x (All CM's), IUC = %s, Offset = %u",
sid, val_to_str (iuc, iuc_vals, "%s"),
offset);
else
proto_tree_add_uint_format (map_tree, hf_docsis_map_ie, tvb, pos, 4,
ie, "SID = %u, IUC = %s, Offset = %u",
sid, val_to_str (iuc, iuc_vals, "%s"),
offset);
pos = pos + 4;
} /* for... */
} /* if(tree) */
}
/* Register the protocol with Ethereal */
/* this format is require because a script is used to build the C function
that calls all the protocol registration.
*/
void
proto_register_docsis_map (void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{&hf_docsis_map,
{"Map Message", "docsis.map",
FT_BYTES, BASE_HEX, NULL, 0x0,
"MAP Message", HFILL}
},
{&hf_docsis_map_ucd_count,
{"UCD Count", "docsis.map.ucdcount",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Map UCD Count", HFILL}
},
{&hf_docsis_map_upstream_chid,
{"Upstream Channel ID", "docsis.map.upchid",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Upstream Channel ID", HFILL}
},
{&hf_docsis_map_numie,
{"Number of IE's", "docsis.map.numie",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Number of Information Elements", HFILL}
},
{&hf_docsis_map_alloc_start,
{"Alloc Start Time (minislots)", "docsis.map.allocstart",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Alloc Start Time (minislots)", HFILL}
},
{&hf_docsis_map_ack_time,
{"ACK Time (minislots)", "docsis.map.acktime",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Ack Time (minislots)", HFILL}
},
{&hf_docsis_map_rng_start,
{"Ranging Backoff Start", "docsis.map.rng_start",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Ranging Backoff Start", HFILL}
},
{&hf_docsis_map_rng_end,
{"Ranging Backoff End", "docsis.map.rng_end",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Ranging Backoff End", HFILL}
},
{&hf_docsis_map_data_start,
{"Data Backoff Start", "docsis.map.data_start",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Data Backoff Start", HFILL}
},
{&hf_docsis_map_data_end,
{"Data Backoff End", "docsis.map.data_end",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Data Backoff End", HFILL}
},
{&hf_docsis_map_ie,
{"Information Element", "docsis.map.ie",
FT_UINT32, BASE_HEX, NULL, 0x0,
"Information Element", HFILL}
},
{&hf_docsis_map_rsvd,
{"Reserved [0x00]", "docsis.map.rsvd",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Reserved Byte", HFILL}
},
{&hf_docsis_map_sid,
{"Service Identifier", "docsis.map.sid",
FT_UINT32, BASE_DEC, NULL, 0xFFFC0000,
"Service Identifier", HFILL}
},
{&hf_docsis_map_iuc,
{"Interval Usage Code", "docsis.map.iuc",
FT_UINT32, BASE_DEC, VALS(iuc_vals), 0x0003c000,
"Interval Usage Code", HFILL}
},
{&hf_docsis_map_offset,
{"Offset", "docsis.map.offset",
FT_UINT32, BASE_DEC, NULL, 0x00003fff,
"Offset", HFILL}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_docsis_map,
};
/* Register the protocol name and description */
proto_docsis_map =
proto_register_protocol ("DOCSIS Upstream Bandwidth Allocation",
"DOCSIS MAP", "docsis_map");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array (proto_docsis_map, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
register_dissector ("docsis_map", dissect_map, proto_docsis_map);
}
/* If this dissector uses sub-dissector registration add a registration routine.
This format is required because a script is used to find these routines and
create the code that calls these routines.
*/
void
proto_reg_handoff_docsis_map (void)
{
dissector_handle_t docsis_map_handle;
docsis_map_handle = find_dissector ("docsis_map");
dissector_add ("docsis_mgmt", 0x03, docsis_map_handle);
}
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