247 lines
6.7 KiB
C
247 lines
6.7 KiB
C
/* packet-pn-mrrt.c
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* Routines for PN-MRRT (PROFINET Media Redundancy for cyclic realtime data)
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* packet 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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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/dissectors/packet-dcerpc.h>
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#include <epan/oui.h>
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#include "packet-pn.h"
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static int proto_pn_mrrt = -1;
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static int hf_pn_mrrt_sequence_id = -1;
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static int hf_pn_mrrt_domain_uuid = -1;
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static int hf_pn_mrrt_type = -1;
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static int hf_pn_mrrt_length = -1;
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static int hf_pn_mrrt_version = -1;
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static int hf_pn_mrrt_sa = -1;
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static gint ett_pn_mrrt = -1;
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static const value_string pn_mrrt_block_type_vals[] = {
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{ 0x00, "End" },
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{ 0x01, "Common" },
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{ 0x02, "Test" },
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/*0x03 - 0x7E Reserved */
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{ 0x7F, "Organizationally Specific"},
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{ 0, NULL },
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};
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static int
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dissect_PNMRRT_Common(tvbuff_t *tvb, int offset,
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packet_info *pinfo, proto_tree *tree, proto_item *item, guint8 length _U_)
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{
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guint16 sequence_id;
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e_uuid_t uuid;
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/* MRRT_SequenceID */
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offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrrt_sequence_id, &sequence_id);
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/* MRRT_DomainUUID */
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offset = dissect_pn_uuid(tvb, offset, pinfo, tree, hf_pn_mrrt_domain_uuid, &uuid);
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if (check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, "Common");
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proto_item_append_text(item, "Common");
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return offset;
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}
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static int
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dissect_PNMRRT_Test(tvbuff_t *tvb, int offset,
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packet_info *pinfo, proto_tree *tree, proto_item *item, guint8 length _U_)
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{
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guint8 mac[6];
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/* MRRT_SA */
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offset = dissect_pn_mac(tvb, offset, pinfo, tree, hf_pn_mrrt_sa, mac);
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/* Padding */
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offset = dissect_pn_align4(tvb, offset, pinfo, tree);
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if (check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, "Test");
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proto_item_append_text(item, "Test");
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return offset;
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}
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static int
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dissect_PNMRRT_PDU(tvbuff_t *tvb, int offset,
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packet_info *pinfo, proto_tree *tree, proto_item *item)
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{
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guint16 version;
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guint8 type;
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guint8 length;
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gint i =0;
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/* MRRT_Version */
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offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrrt_version, &version);
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while(tvb_length_remaining(tvb, offset) > 0) {
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/* MRRT_TLVHeader.Type */
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offset = dissect_pn_uint8(tvb, offset, pinfo, tree, hf_pn_mrrt_type, &type);
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/* MRRT_TLVHeader.Length */
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offset = dissect_pn_uint8(tvb, offset, pinfo, tree, hf_pn_mrrt_length, &length);
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if(i != 0) {
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if (check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, ", ");
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proto_item_append_text(item, ", ");
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}
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i++;
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switch(type) {
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case(0x00):
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/* no content */
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if (check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, "End");
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proto_item_append_text(item, "End");
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return offset;
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break;
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case(0x01):
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offset = dissect_PNMRRT_Common(tvb, offset, pinfo, tree, item, length);
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break;
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case(0x02):
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offset = dissect_PNMRRT_Test(tvb, offset, pinfo, tree, item, length);
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break;
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default:
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offset = dissect_pn_undecoded(tvb, offset, pinfo, tree, length);
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if (check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, "Unknown TLVType 0x%x", type);
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proto_item_append_text(item, "Unknown TLVType 0x%x", type);
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}
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}
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return offset;
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}
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/* possibly dissect a PN-RT packet (frame ID must be in the appropriate range) */
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static gboolean
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dissect_PNMRRT_Data_heur(tvbuff_t *tvb,
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packet_info *pinfo, proto_tree *tree)
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{
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guint16 u16FrameID;
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proto_item *item = NULL;
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proto_tree *mrrt_tree = NULL;
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int offset = 0;
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guint32 u32SubStart;
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/* the tvb will NOT contain the frame_id here, so get it from our private data! */
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u16FrameID = GPOINTER_TO_UINT(pinfo->private_data);
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/* frame id must be in valid range (MRRT) */
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if (u16FrameID != 0xFF60) {
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/* we are not interested in this packet */
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return FALSE;
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}
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_add_str(pinfo->cinfo, COL_PROTOCOL, "PN-MRRT");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_add_str(pinfo->cinfo, COL_INFO, "");
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/* subtree for MRRT */
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item = proto_tree_add_protocol_format(tree, proto_pn_mrrt, tvb, 0, 0, "PROFINET MRRT, ");
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mrrt_tree = proto_item_add_subtree(item, ett_pn_mrrt);
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u32SubStart = offset;
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offset = dissect_PNMRRT_PDU(tvb, offset, pinfo, mrrt_tree, item);
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proto_item_set_len(item, offset - u32SubStart);
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return TRUE;
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}
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void
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proto_register_pn_mrrt (void)
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{
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static hf_register_info hf[] = {
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{ &hf_pn_mrrt_type,
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{ "Type", "pn_mrrt.type", FT_UINT8, BASE_HEX, VALS(pn_mrrt_block_type_vals), 0x0, "", HFILL }},
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{ &hf_pn_mrrt_length,
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{ "Length", "pn_mrrt.length", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
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{ &hf_pn_mrrt_version,
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{ "Version", "pn_mrrt.version", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
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{ &hf_pn_mrrt_sequence_id,
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{ "SequenceID", "pn_mrrt.sequence_id", FT_UINT16, BASE_HEX, NULL, 0x0, "Unique sequence number to each outstanding service request", HFILL }},
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{ &hf_pn_mrrt_sa,
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{ "SA", "pn_mrrt.sa", FT_ETHER, BASE_HEX, 0x0, 0x0, "", HFILL }},
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{ &hf_pn_mrrt_domain_uuid,
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{ "DomainUUID", "pn_mrrt.domain_uuid", FT_GUID, BASE_NONE, NULL, 0x0, "", HFILL }},
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};
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static gint *ett[] = {
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&ett_pn_mrrt
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};
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proto_pn_mrrt = proto_register_protocol ("PROFINET MRRT", "PN-MRRT", "pn_mrrt");
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proto_register_field_array (proto_pn_mrrt, hf, array_length (hf));
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proto_register_subtree_array (ett, array_length (ett));
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}
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void
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proto_reg_handoff_pn_mrrt (void)
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{
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/* register ourself as an heuristic pn-rt payload dissector */
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heur_dissector_add("pn_rt", dissect_PNMRRT_Data_heur, proto_pn_mrrt);
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}
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