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