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/* packet-sercosiii_1v1_mdt.c
* Routines for SERCOS III dissection
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* 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 <glib.h>
#include <epan/packet.h>
#include "packet-sercosiii.h"
static gint hf_siii_mdt_version = -1;
static gint hf_siii_mdt_version_initprocvers = -1;
static gint hf_siii_mdt_version_num_mdt_at_cp1_2 = -1;
static gint hf_siii_mdt_version_revision = -1;
static const value_string siii_mdt_version_num_mdtat_cp1_2_text[]=
{
{0x00, "2 MDTs/ATs in CP1/2"},
{0x01, "4 MDTs/ATs in CP1/2"},
{0, NULL}
};
static const value_string siii_mdt_version_initprocvers_text[]=
{
{0x00, "No remote address allocation"},
{0x01, "Remote address allocation"},
{0, NULL}
};
static gint ett_siii_mdt = -1;
static gint ett_siii_mdt_svc = -1;
static gint ett_siii_mdt_devctrls = -1;
static gint ett_siii_mdt_version = -1;
static gint ett_siii_mdt_svc_channel[MAX_SERCOS_DEVICES];
static gint ett_siii_mdt_dev_control[MAX_SERCOS_DEVICES];
static void dissect_siii_mdt_cp0(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
proto_item* ti;
proto_tree* subtree;
ti = proto_tree_add_item(tree, hf_siii_mdt_version, tvb, 0, 4, TRUE);
subtree = proto_item_add_subtree(ti, ett_siii_mdt_version);
proto_tree_add_item(subtree, hf_siii_mdt_version_num_mdt_at_cp1_2, tvb, 0, 4, TRUE);
proto_tree_add_item(subtree, hf_siii_mdt_version_initprocvers, tvb, 0, 4, TRUE);
proto_tree_add_item(subtree, hf_siii_mdt_version_revision, tvb, 0, 4, TRUE);
}
static void dissect_siii_mdt_cp1_2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint telno)
{
guint devstart = telno * 128; /* MDT0: slaves 0-127; MDT1: slaves 128-255; ... */
tvbuff_t* tvb_n;
guint idx;
proto_item* ti;
proto_tree* subtree;
proto_tree* subtree_svc;
proto_tree* subtree_devctrl;
ti = proto_tree_add_text(tree, tvb, 0, 128 * 6, "Service Channels");
subtree_svc = proto_item_add_subtree(ti, ett_siii_mdt_svc);
ti = proto_tree_add_text(tree, tvb, 128 * 6, 512, "Device Control");
subtree_devctrl = proto_item_add_subtree(ti, ett_siii_mdt_svc);
for(idx = 0; idx < 128; ++idx) /* each MDT of CP1/2 has data for 128 different slaves */
{
tvb_n = tvb_new_subset(tvb, 6 * idx, 6, 6); /* subset for service channel data */
ti = proto_tree_add_text(subtree_svc, tvb_n, 0, 6, "Device %u", idx + devstart);
subtree = proto_item_add_subtree(ti, ett_siii_mdt_svc_channel[idx]);
dissect_siii_mdt_svc(tvb_n, pinfo, subtree, idx + devstart);
tvb_n = tvb_new_subset(tvb, 128 * 6 + 4 * idx, 2, 2); /* subset for device control information */
ti = proto_tree_add_text(subtree_devctrl, tvb_n, 0, 2, "Device %u", idx + devstart);
subtree = proto_item_add_subtree(ti, ett_siii_mdt_dev_control[idx]);
dissect_siii_mdt_devctrl(tvb_n, pinfo, subtree);
}
}
static void dissect_siii_mdt_cp3_4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint telno)
{
guint devstart _U_ = telno * 128;
proto_item* ti;
proto_tree* subtree_svc;
proto_tree* subtree_devctrl;
if(0 == telno) /* dissect hotplug field in MDT0 only */
dissect_siii_mdt_hp(tvb, pinfo, tree);
/* offsets of service channel, device status and connections are unknown
* this data could be extracted from svc communication during CP2
*/
ti = proto_tree_add_text(tree, tvb, 0, 0, "Service Channels");
subtree_svc = proto_item_add_subtree(ti, ett_siii_mdt_svc);
ti = proto_tree_add_text(tree, tvb, 0, 0, "Device Controls");
subtree_devctrl = proto_item_add_subtree(ti, ett_siii_mdt_svc);
}
void dissect_siii_mdt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item* ti;
proto_tree* subtree;
tvbuff_t* tvb_n;
guint t_phase;
guint telno;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SIII MDT");
t_phase = (tvb_get_guint8(tvb, 1)&0x8F); /* read communication phase out of SERCOS III header */
telno = (tvb_get_guint8(tvb, 0) & 0xF); /* read number of MDT out of SERCOS III header */
if(check_col(pinfo->cinfo, COL_INFO))
{
if(t_phase & 0x80) /* communication phase switching in progress */
{
col_append_fstr(pinfo->cinfo, COL_INFO, " Phase=CP?s -> CP%u",
(t_phase&0x0f));
}
else /* communication as usual */
{
col_append_fstr(pinfo->cinfo, COL_INFO, " Phase=CP%u",
(t_phase&0x0f));
}
}
ti = proto_tree_add_text(tree, tvb, 0, -1, "MDT%u", telno);
subtree = proto_item_add_subtree(ti, ett_siii_mdt);
dissect_siii_mst(tvb, pinfo, subtree); /* dissect SERCOS III header */
switch(t_phase) /* call the MDT dissector depending on the current communication phase */
{
case COMMUNICATION_PHASE_0: /* CP0 */
tvb_n = tvb_new_subset(tvb, 6, 40, 40);
dissect_siii_mdt_cp0(tvb_n, pinfo, subtree);
break;
case COMMUNICATION_PHASE_1: /* CP1 */
case COMMUNICATION_PHASE_2: /* CP2 */
tvb_n = tvb_new_subset(tvb, 6, 1280, 1280);
dissect_siii_mdt_cp1_2(tvb_n, pinfo, subtree, telno);
break;
case COMMUNICATION_PHASE_3: /* CP3 */
case COMMUNICATION_PHASE_4: /* CP4 */
tvb_n = tvb_new_subset_remaining(tvb, 6);
dissect_siii_mdt_cp3_4(tvb_n, pinfo, subtree, telno);
break;
default:
proto_tree_add_text(tree, tvb, 6, -1, "CP is unknown");
}
}
void dissect_siii_mdt_init(gint proto_siii)
{
gint idx;
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf_siii_header[] = {
{ &hf_siii_mdt_version,
{ "Communication Version", "siii.mdt.version",
FT_UINT32, BASE_HEX, NULL, 0,
NULL, HFILL }
},
{ &hf_siii_mdt_version_revision,
{ "Revision Number", "siii.mdt.version.revision",
FT_UINT32, BASE_HEX, NULL, 0x7F,
NULL, HFILL }
},
{ &hf_siii_mdt_version_num_mdt_at_cp1_2,
{ "Number of MDTs and ATS in CP1 and CP2", "siii.mdt.version.num_mdt_at_cp1_2",
FT_UINT32, BASE_HEX, VALS(siii_mdt_version_num_mdtat_cp1_2_text), 0x30000,
NULL, HFILL }
},
{ &hf_siii_mdt_version_initprocvers,
{ "Initialization Procedure Version Number", "siii.mdt.version.initprocvers",
FT_UINT32, BASE_HEX, VALS(siii_mdt_version_initprocvers_text), 0xFF00,
NULL, HFILL }
}
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_siii_mdt,
&ett_siii_mdt_version,
&ett_siii_mdt_svc,
&ett_siii_mdt_devctrls
};
static gint* etts[MAX_SERCOS_DEVICES];
for(idx = 0; idx < MAX_SERCOS_DEVICES; ++idx)
{
ett_siii_mdt_svc_channel[idx] = -1;
etts[idx] = &ett_siii_mdt_svc_channel[idx];
}
proto_register_subtree_array(etts, array_length(etts));
for(idx = 0; idx < MAX_SERCOS_DEVICES; ++idx)
{
ett_siii_mdt_dev_control[idx] = -1;
etts[idx] = &ett_siii_mdt_dev_control[idx];
}
proto_register_subtree_array(etts, array_length(etts));
proto_register_field_array(proto_siii, hf_siii_header, array_length(hf_siii_header));
proto_register_subtree_array(ett, array_length(ett));
}
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