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wireshark/plugins/docsis/packet-rngrsp.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

297 lines
8.1 KiB
C
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/* packet-rngrsp.c
* Routines for Ranging Response 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 RNGRSP_TIMING 1
#define RNGRSP_PWR_LEVEL_ADJ 2
#define RNGRSP_OFFSET_FREQ_ADJ 3
#define RNGRSP_TRANSMIT_EQ_ADJ 4
#define RNGRSP_RANGING_STATUS 5
#define RNGRSP_DOWN_FREQ_OVER 6
#define RNGRSP_UP_CHID_OVER 7
/* Initialize the protocol and registered fields */
static int proto_docsis_rngrsp = -1;
static int hf_docsis_rngrsp = -1;
static int hf_docsis_rngrsp_upstream_chid = -1;
static int hf_docsis_rngrsp_sid = -1;
static int hf_docsis_rngrsp_timing_adj = -1;
static int hf_docsis_rngrsp_power_adj = -1;
static int hf_docsis_rngrsp_freq_adj = -1;
static int hf_docsis_rngrsp_xmit_eq_adj = -1;
static int hf_docsis_rngrsp_ranging_status = -1;
static int hf_docsis_rngrsp_down_freq_over = -1;
static int hf_docsis_rngrsp_upstream_ch_over = -1;
static const value_string rng_stat_vals[] = {
{1, "Continue"},
{2, "Abort"},
{3, "Success"},
{0, NULL}
};
/* Initialize the subtree pointers */
static gint ett_docsis_rngrsp = -1;
/* Code to actually dissect the packets */
static void
dissect_rngrsp (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
proto_item *it;
proto_tree *rngrsp_tree;
guint8 tlvtype, tlvlen;
int pos;
gint length;
guint8 upchid;
guint16 sid;
gint8 pwr;
gint32 tim;
sid = tvb_get_ntohs (tvb, 0);
upchid = tvb_get_guint8 (tvb, 2);
if (check_col (pinfo->cinfo, COL_INFO))
{
col_clear (pinfo->cinfo, COL_INFO);
if (upchid > 0)
col_add_fstr (pinfo->cinfo, COL_INFO,
"Ranging Response: SID = %u, Upstream Channel = %u (U%u)",
sid, upchid, upchid - 1);
else
col_add_fstr (pinfo->cinfo, COL_INFO,
"Ranging Response: SID = %u, Telephony Return", sid);
}
if (tree)
{
it =
proto_tree_add_protocol_format (tree, proto_docsis_rngrsp, tvb, 0, -1,
"Ranging Response");
rngrsp_tree = proto_item_add_subtree (it, ett_docsis_rngrsp);
proto_tree_add_item (rngrsp_tree, hf_docsis_rngrsp_sid, tvb, 0, 2,
FALSE);
proto_tree_add_item (rngrsp_tree, hf_docsis_rngrsp_upstream_chid, tvb,
2, 1, FALSE);
length = tvb_reported_length_remaining (tvb, 0);
pos = 3;
while (pos < length)
{
tlvtype = tvb_get_guint8 (tvb, pos++);
tlvlen = tvb_get_guint8 (tvb, pos++);
switch (tlvtype)
{
case RNGRSP_TIMING:
if (tlvlen == 4)
{
tim = tvb_get_ntohl (tvb, pos);
proto_tree_add_int (rngrsp_tree,
hf_docsis_rngrsp_timing_adj, tvb, pos,
tlvlen, tim);
}
else
{
THROW (ReportedBoundsError);
}
break;
case RNGRSP_PWR_LEVEL_ADJ:
if (tlvlen == 1)
{
pwr = tvb_get_guint8 (tvb, pos);
proto_tree_add_int (rngrsp_tree, hf_docsis_rngrsp_power_adj,
tvb, pos, tlvlen, pwr);
}
else
{
THROW (ReportedBoundsError);
}
break;
case RNGRSP_OFFSET_FREQ_ADJ:
if (tlvlen == 2)
{
proto_tree_add_item (rngrsp_tree, hf_docsis_rngrsp_freq_adj,
tvb, pos, tlvlen, FALSE);
}
else
{
THROW (ReportedBoundsError);
}
break;
case RNGRSP_TRANSMIT_EQ_ADJ:
proto_tree_add_item (rngrsp_tree, hf_docsis_rngrsp_xmit_eq_adj,
tvb, pos, tlvlen, FALSE);
break;
case RNGRSP_RANGING_STATUS:
if (tlvlen == 1)
proto_tree_add_item (rngrsp_tree,
hf_docsis_rngrsp_ranging_status, tvb,
pos, tlvlen, FALSE);
else
{
THROW (ReportedBoundsError);
}
break;
case RNGRSP_DOWN_FREQ_OVER:
if (tlvlen == 4)
proto_tree_add_item (rngrsp_tree,
hf_docsis_rngrsp_down_freq_over, tvb,
pos, tlvlen, FALSE);
else
{
THROW (ReportedBoundsError);
}
break;
case RNGRSP_UP_CHID_OVER:
if (tlvlen == 1)
proto_tree_add_item (rngrsp_tree,
hf_docsis_rngrsp_upstream_ch_over, tvb,
pos, tlvlen, FALSE);
else
{
THROW (ReportedBoundsError);
}
break;
} /* switch(tlvtype) */
pos = pos + tlvlen;
} /* while (pos < length) */
} /* 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_rngrsp (void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{&hf_docsis_rngrsp,
{"RNG-RSP Message", "docsis.rngrsp",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Ranging Response Message", HFILL}
},
{&hf_docsis_rngrsp_sid,
{"Service Identifier", "docsis.rngrsp.sid",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Service Identifier", HFILL}
},
{&hf_docsis_rngrsp_upstream_chid,
{"Upstream Channel ID", "docsis.rngrsp.upchid",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Upstream Channel ID", HFILL}
},
{&hf_docsis_rngrsp_timing_adj,
{"Timing Adjust (6.25us/64)", "docsis.rngrsp.timingadj",
FT_INT32, BASE_DEC, NULL, 0x0,
"Timing Adjust", HFILL}
},
{&hf_docsis_rngrsp_power_adj,
{"Power Level Adjust (0.25dB units)", "docsis.rngrsp.poweradj",
FT_INT8, BASE_DEC, NULL, 0x0,
"Power Level Adjust", HFILL}
},
{&hf_docsis_rngrsp_freq_adj,
{"Offset Freq Adjust (Hz)", "docsis.rngrsp.freqadj",
FT_INT16, BASE_DEC, NULL, 0x0,
"Frequency Adjust", HFILL}
},
{&hf_docsis_rngrsp_xmit_eq_adj,
{"Transmit Equalisation Adjust", "docsis.rngrsp.xmit_eq_adj",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Timing Equalisation Adjust", HFILL}
},
{&hf_docsis_rngrsp_ranging_status,
{"Ranging Status", "docsis.rngrsp.rng_stat",
FT_UINT8, BASE_DEC, VALS (rng_stat_vals), 0x0,
"Ranging Status", HFILL}
},
{&hf_docsis_rngrsp_down_freq_over,
{"Downstream Frequency Override (Hz)", "docsis.rngrsp.freq_over",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Downstream Frequency Override", HFILL}
},
{&hf_docsis_rngrsp_upstream_ch_over,
{"Upstream Channel ID Override", "docsis.rngrsp.chid_override",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Upstream Channel ID Override", HFILL}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_docsis_rngrsp,
};
/* Register the protocol name and description */
proto_docsis_rngrsp = proto_register_protocol ("DOCSIS Ranging Response",
"DOCSIS RNG-RSP",
"docsis_rngrsp");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array (proto_docsis_rngrsp, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
register_dissector ("docsis_rngrsp", dissect_rngrsp, proto_docsis_rngrsp);
}
/* 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_rngrsp (void)
{
dissector_handle_t docsis_rngrsp_handle;
docsis_rngrsp_handle = find_dissector ("docsis_rngrsp");
dissector_add ("docsis_mgmt", 0x05, docsis_rngrsp_handle);
}
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