forked from osmocom/wireshark
212 lines
8.8 KiB
C
212 lines
8.8 KiB
C
/******************************************************************************
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** $Id$
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**
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** Copyright (C) 2006-2007 ascolab GmbH. All Rights Reserved.
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** Web: http://www.ascolab.com
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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 file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**
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** Project: OpcUa Wireshark Plugin
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**
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** Description: OpcUa Transport Layer Decoder.
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**
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** Author: Gerhard Gappmeier <gerhard.gappmeier@ascolab.com>
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** Last change by: $Author: gergap $
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**
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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 "opcua_security_layer.h"
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#include "opcua_application_layer.h"
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#include "opcua_simpletypes.h"
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#include <string.h>
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#include <epan/emem.h>
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void dispatchService(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, int ServiceId);
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static int hf_opcua_transport_sig = -1;
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static int hf_opcua_transport_len = -1;
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static int hf_opcua_transport_ver = -1;
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static int hf_opcua_transport_cid = -1;
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static int hf_opcua_transport_lifetime = -1;
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static int hf_opcua_transport_sbl = -1;
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static int hf_opcua_transport_rbl = -1;
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static int hf_opcua_transport_endpoint = -1;
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static int hf_opcua_transport_rlifetime = -1;
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static int hf_opcua_transport_rsbl = -1;
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static int hf_opcua_transport_rrbl = -1;
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static int hf_opcua_transport_altendpoint = -1;
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static int hf_opcua_transport_rqid = -1;
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static int hf_opcua_transport_status = -1;
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extern gint ett_opcua_nodeid;
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static hf_register_info hf[] =
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{
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{ &hf_opcua_transport_sig,
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/* full name , abbreviation , type , display , strings, bitmask, blurb, id, parent, ref_count, bitshift */
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{ "Signature", "transport.sig", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_len,
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{ "Message Length", "transport.len", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_ver,
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{ "Version", "transport.ver", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_cid,
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{ "ConnectionId", "transport.cid", FT_GUID, BASE_NONE, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_lifetime,
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{ "Lifetime", "transport.lifetime", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_sbl,
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{ "SendBufferLength", "transport.sbl", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_rbl,
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{ "ReceiveBufferLength", "transport.rbl", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_endpoint,
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{ "EndPoint", "transport.endpoint", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_rlifetime,
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{ "Revised Lifetime", "transport.rlifetime", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_rsbl,
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{ "Revised SendBufferLength", "transport.rsbl", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_rrbl,
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{ "Revised ReceiveBufferLength", "transport.rrbl", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_altendpoint,
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{ "Alternate EndPoint", "transport.altendpoint", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_rqid,
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{ "RequestId", "transport.rqid", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }
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},
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{ &hf_opcua_transport_status,
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{ "StatusCode", "transport.status", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }
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}
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};
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/** subtree types */
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extern gint ett_opcua_extensionobject;
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/** Register transport layer types. */
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void registerTransportLayerTypes(int proto)
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{
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proto_register_field_array(proto, hf, array_length(hf));
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}
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/** helper functions for adding strings,
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* that are not zero terminated.
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*/
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void addString(proto_tree *tree,
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int hfindex,
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tvbuff_t *tvb,
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gint start,
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gint length,
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const char *value)
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{
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char *szValue = ep_alloc(256);
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if (szValue)
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{
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if (length > 255) length = 255;
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/* copy non null terminated string data */
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strncpy(szValue, value, length);
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/* set null terminator */
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szValue[length] = 0;
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proto_tree_add_string(tree, hfindex, tvb, start, length, szValue);
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}
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}
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/* Transport Layer: message parsers */
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void parseHello(proto_tree *tree, tvbuff_t *tvb, gint *pOffset)
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{
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addString(tree, hf_opcua_transport_sig, tvb, *pOffset, 4, tvb->real_data); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_len, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_ver, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_cid, tvb, *pOffset, 16, TRUE); *pOffset+=16;
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proto_tree_add_item(tree, hf_opcua_transport_lifetime, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_sbl, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_rbl, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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parseString(tree, tvb, pOffset, hf_opcua_transport_endpoint);
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}
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void parseAcknowledge(proto_tree *tree, tvbuff_t *tvb, gint *pOffset)
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{
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addString(tree, hf_opcua_transport_sig, tvb, *pOffset, 4, tvb->real_data); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_len, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_cid, tvb, *pOffset, 16, TRUE); *pOffset+=16;
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proto_tree_add_item(tree, hf_opcua_transport_rlifetime, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_rsbl, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_rrbl, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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parseString(tree, tvb, pOffset, hf_opcua_transport_altendpoint);
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}
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void parseDisconnect(proto_tree *tree, tvbuff_t *tvb, gint *pOffset)
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{
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addString(tree, hf_opcua_transport_sig, tvb, *pOffset, 4, tvb->real_data); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_len, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_cid, tvb, *pOffset, 16, TRUE); *pOffset+=16;
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}
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void parseData(proto_tree *tree, tvbuff_t *tvb, gint *pOffset)
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{
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proto_item *ti;
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proto_tree *encobj_tree;
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proto_tree *nodeid_tree;
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int ServiceId = 0;
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addString(tree, hf_opcua_transport_sig, tvb, *pOffset, 4, tvb->real_data); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_len, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_cid, tvb, *pOffset, 16, TRUE); *pOffset+=16;
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proto_tree_add_item(tree, hf_opcua_transport_rqid, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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/* message data contains the security layer */
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parseSecurityLayer(tree, tvb, pOffset);
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/* AT THE MOMENT NO SECURITY IS IMPLEMENTED IN UA.
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* WE CAN JUST JUMP INTO THE APPLICATION LAYER DATA.
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* THIS WILL CHAHNGE IN THE FUTURE. */
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/* add encodeable object subtree */
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ti = proto_tree_add_text(tree, tvb, 0, -1, "Message : Encodeable Object");
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encobj_tree = proto_item_add_subtree(ti, ett_opcua_extensionobject);
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/* add nodeid subtree */
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ti = proto_tree_add_text(encobj_tree, tvb, 0, -1, "TypeId : ExpandedNodeId");
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nodeid_tree = proto_item_add_subtree(ti, ett_opcua_nodeid);
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ServiceId = parseServiceNodeId(nodeid_tree, tvb, pOffset, "NodeId") - 1;
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dispatchService(encobj_tree, tvb, pOffset, ServiceId);
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}
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void parseAbort(proto_tree *tree, tvbuff_t *tvb, gint *pOffset)
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{
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addString(tree, hf_opcua_transport_sig, tvb, *pOffset, 4, tvb->real_data); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_len, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_cid, tvb, *pOffset, 16, TRUE); *pOffset+=16;
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proto_tree_add_item(tree, hf_opcua_transport_rqid, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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}
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void parseError(proto_tree *tree, tvbuff_t *tvb, gint *pOffset)
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{
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addString(tree, hf_opcua_transport_sig, tvb, *pOffset, 4, tvb->real_data); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_len, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_cid, tvb, *pOffset, 16, TRUE); *pOffset+=16;
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proto_tree_add_item(tree, hf_opcua_transport_rqid, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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proto_tree_add_item(tree, hf_opcua_transport_status, tvb, *pOffset, 4, TRUE); *pOffset+=4;
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}
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