forked from osmocom/wireshark
5a04ff0438
trunk/plugins/profinet/packet-pn-rt.c: In function ‘IsDFP_Frame’: trunk/plugins/profinet/packet-pn-rt.c:182:9: error: ‘u8SFCycleCounter’ undeclared (first use in this function) trunk/plugins/profinet/packet-pn-rt.c:182:9: note: each undeclared identifier is reported only once for each function it appears in svn path=/trunk/; revision=40063
779 lines
30 KiB
C
779 lines
30 KiB
C
/* packet-pn-rt.c
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* Routines for pn-rt (PROFINET Real-Time) packet dissection.
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* This is the base for other PROFINET protocols like IO, CBA, DCP, ...
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* (the "content subdissectors" will register themselves using a heuristic)
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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 1999 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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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#include <epan/packet.h>
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#include <epan/addr_resolv.h>
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#include <epan/prefs.h>
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#include <epan/strutil.h>
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#include <epan/etypes.h>
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#include <epan/expert.h>
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#include <epan/dissectors/packet-dcerpc.h>
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#include <epan/crc16-tvb.h>
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#include "packet-pn.h"
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/* Define the pn-rt proto */
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static int proto_pn_rt = -1;
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/* Define many header fields for pn-rt */
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static int hf_pn_rt_frame_id = -1;
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static int hf_pn_rt_cycle_counter = -1;
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static int hf_pn_rt_transfer_status = -1;
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static int hf_pn_rt_data_status = -1;
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static int hf_pn_rt_data_status_ignore = -1;
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static int hf_pn_rt_data_status_Reserved_2 = -1;
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static int hf_pn_rt_data_status_ok = -1;
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static int hf_pn_rt_data_status_operate = -1;
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static int hf_pn_rt_data_status_res3 = -1;
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static int hf_pn_rt_data_status_valid = -1;
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static int hf_pn_rt_data_status_redundancy = -1;
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static int hf_pn_rt_data_status_primary = -1;
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static int hf_pn_rt_sf_crc16 = -1;
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static int hf_pn_rt_sf = -1;
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static int hf_pn_rt_sf_position = -1;
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static int hf_pn_rt_sf_position_control = -1;
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static int hf_pn_rt_sf_data_length = -1;
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static int hf_pn_rt_sf_cycle_counter = -1;
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static int hf_pn_rt_frag = -1;
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static int hf_pn_rt_frag_data_length = -1;
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static int hf_pn_rt_frag_status = -1;
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static int hf_pn_rt_frag_status_more_follows = -1;
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static int hf_pn_rt_frag_status_error = -1;
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static int hf_pn_rt_frag_status_fragment_number = -1;
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static int hf_pn_rt_frag_data = -1;
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/*
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* Define the trees for pn-rt
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* We need one tree for pn-rt itself and one for the pn-rt data status subtree
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*/
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static int ett_pn_rt = -1;
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static int ett_pn_rt_data_status = -1;
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static int ett_pn_rt_sf = -1;
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static int ett_pn_rt_frag = -1;
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static int ett_pn_rt_frag_status = -1;
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/*
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* Here are the global variables associated with
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* the various user definable characteristics of the dissection
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*/
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/* Place summary in proto tree */
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static gboolean pn_rt_summary_in_tree = TRUE;
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/* heuristic to find the right pn-rt payload dissector */
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static heur_dissector_list_t heur_subdissector_list;
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static const value_string pn_rt_position_control[] = {
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{ 0x00, "CRC16 and CycleCounter shall not be checked" },
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{ 0x80, "CRC16 and CycleCounter valid" },
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{ 0, NULL }
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};
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static const value_string pn_rt_ds_redundancy[] = {
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{ 0x00, "One primary AR of a given AR-set is present" },
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{ 0x01, "None primary AR of a given AR-set is present" },
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{ 0, NULL }
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};
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static const value_string pn_rt_frag_status_error[] = {
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{ 0x00, "No error" },
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{ 0x01, "An error occured, all earlier fragments shall be dropped" },
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{ 0, NULL }
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};
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static const value_string pn_rt_frag_status_more_follows[] = {
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{ 0x00, "Last fragment" },
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{ 0x01, "More fragments follow" },
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{ 0, NULL }
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};
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static void
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dissect_DataStatus(tvbuff_t *tvb, int offset, proto_tree *tree, guint8 u8DataStatus)
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{
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proto_item *sub_item;
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proto_tree *sub_tree;
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sub_item = proto_tree_add_uint_format(tree, hf_pn_rt_data_status,
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tvb, offset, 1, u8DataStatus,
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"DataStatus: 0x%02x (Frame: %s and %s, Provider: %s and %s)",
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u8DataStatus,
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(u8DataStatus & 0x04) ? "Valid" : "Invalid",
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(u8DataStatus & 0x01) ? "Primary" : "Backup",
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(u8DataStatus & 0x20) ? "Ok" : "Problem",
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(u8DataStatus & 0x10) ? "Run" : "Stop");
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sub_tree = proto_item_add_subtree(sub_item, ett_pn_rt_data_status);
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proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_ignore, tvb, offset, 1, u8DataStatus);
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proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_Reserved_2, tvb, offset, 1, u8DataStatus);
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proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_ok, tvb, offset, 1, u8DataStatus);
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proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_operate, tvb, offset, 1, u8DataStatus);
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proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_res3, tvb, offset, 1, u8DataStatus);
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proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_valid, tvb, offset, 1, u8DataStatus);
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proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_redundancy, tvb, offset, 1, u8DataStatus);
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proto_tree_add_uint(sub_tree, hf_pn_rt_data_status_primary, tvb, offset, 1, u8DataStatus);
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}
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static gboolean IsDFP_Frame(tvbuff_t *tvb)
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{
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guint16 u16SFCRC16;
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guint8 u8SFPosition;
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guint8 u8SFDataLength = 255;
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int offset = 0;
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guint32 u32SubStart;
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guint16 crc;
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gint tvb_len =0;
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offset += 2; /*Skip first crc because data is no more available */
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tvb_len = tvb_length(tvb);
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if(offset + 4 > tvb_len)
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return FALSE;
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while(1) {
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u32SubStart = offset;
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u8SFPosition = tvb_get_guint8(tvb, offset);
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offset += 1;
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u8SFDataLength = tvb_get_guint8(tvb, offset);
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offset += 1;
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if(u8SFDataLength == 0) {
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break;
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}
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offset += 1;
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offset += 1;
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offset += u8SFDataLength;
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if(offset > tvb_len)
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return /*TRUE; */FALSE;
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u16SFCRC16 = tvb_get_letohs(tvb, offset);
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if(u16SFCRC16 != 0){
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if(u8SFPosition & 0x80) {
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crc = crc16_plain_tvb_offset(tvb, u32SubStart, offset-u32SubStart);
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if(crc != u16SFCRC16) {
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return FALSE;
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} else {
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}
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} else {
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}
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}
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offset += 2;
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}
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return TRUE;
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}
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/* possibly dissect a CSF_SDU related PN-RT packet */
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gboolean
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dissect_CSF_SDU_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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guint16 u16SFCRC16;
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guint8 u8SFPosition;
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guint8 u8SFDataLength = 255;
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guint8 u8SFCycleCounter;
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guint8 u8SFDataStatus;
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gint offset = 0;
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guint32 u32SubStart;
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proto_item *sub_item;
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proto_tree *sub_tree;
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proto_item *item;
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guint16 crc;
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/* the sub tvb will NOT contain the frame_id here! */
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u16FrameID = GPOINTER_TO_UINT(pinfo->private_data);
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/* possible FrameID ranges for DFP */
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if((u16FrameID < 0x100) || (u16FrameID > 0x0fff))
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return (FALSE);
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if (IsDFP_Frame(tvb)) {
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/* can't check this CRC, as the checked data bytes are not available */
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u16SFCRC16 = tvb_get_letohs(tvb, offset);
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proto_tree_add_uint(tree, hf_pn_rt_sf_crc16, tvb, offset, 2, u16SFCRC16);
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offset += 2;
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while(1) {
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sub_item = proto_tree_add_item(tree, hf_pn_rt_sf, tvb, offset, 0, ENC_NA);
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sub_tree = proto_item_add_subtree(sub_item, ett_pn_rt_sf);
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u32SubStart = offset;
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u8SFPosition = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(sub_tree, hf_pn_rt_sf_position, tvb, offset, 1, u8SFPosition);
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offset += 1;
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u8SFDataLength = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(sub_tree, hf_pn_rt_sf_data_length, tvb, offset, 1, u8SFDataLength);
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offset += 1;
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if(u8SFDataLength == 0) {
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proto_item_append_text(sub_item, ": Pos:%u, Length:%u", u8SFPosition, u8SFDataLength);
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proto_item_set_len(sub_item, offset - u32SubStart);
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break;
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}
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u8SFCycleCounter = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(sub_tree, hf_pn_rt_sf_cycle_counter, tvb, offset, 1, u8SFCycleCounter);
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offset += 1;
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u8SFDataStatus = tvb_get_guint8(tvb, offset);
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dissect_DataStatus(tvb, offset, sub_tree, u8SFDataStatus);
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offset += 1;
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offset = dissect_pn_user_data(tvb, offset, pinfo, sub_tree, u8SFDataLength, "DataItem");
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u16SFCRC16 = tvb_get_letohs(tvb, offset);
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item = proto_tree_add_uint(sub_tree, hf_pn_rt_sf_crc16, tvb, offset, 2, u16SFCRC16);
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if(u16SFCRC16 != 0 /* "old check": u8SFPosition & 0x80 */) {
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crc = crc16_plain_tvb_offset(tvb, u32SubStart, offset-u32SubStart);
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if(crc != u16SFCRC16) {
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proto_item_append_text(item, " [Preliminary check: incorrect, should be: %u]", crc);
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expert_add_info_format(pinfo, item, PI_CHECKSUM, PI_ERROR, "Bad checksum");
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} else {
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proto_item_append_text(item, " [Preliminary check: Correct]");
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}
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} else {
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proto_item_append_text(item, " [No check, supplied CRC == zero]");
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}
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offset += 2;
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proto_item_append_text(sub_item, ": Pos:%u, Length:%u, Cycle:%u, Status: 0x%02x (%s,%s,%s,%s)",
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u8SFPosition, u8SFDataLength, u8SFCycleCounter, u8SFDataStatus,
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(u8SFDataStatus & 0x04) ? "Valid" : "Invalid",
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(u8SFDataStatus & 0x01) ? "Primary" : "Backup",
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(u8SFDataStatus & 0x20) ? "Ok" : "Problem",
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(u8SFDataStatus & 0x10) ? "Run" : "Stop");
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proto_item_set_len(sub_item, offset - u32SubStart);
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}
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return TRUE;
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}
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return FALSE;
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}
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/* possibly dissect a FRAG_PDU related PN-RT packet */
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static gboolean
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dissect_FRAG_PDU_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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int offset = 0;
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proto_item *sub_item;
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proto_tree *sub_tree;
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guint8 u8FragDataLength;
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proto_item *status_item;
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proto_tree *status_tree;
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guint8 u8FragStatus;
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/* the sub tvb will NOT contain the frame_id here! */
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u16FrameID = GPOINTER_TO_UINT(pinfo->private_data);
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/* possible FrameID ranges for FRAG_PDU */
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if (u16FrameID >= 0xFF80 && u16FrameID <= 0xFF8F) {
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sub_item = proto_tree_add_item(tree, hf_pn_rt_frag, tvb, offset, 0, ENC_NA);
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sub_tree = proto_item_add_subtree(sub_item, ett_pn_rt_frag);
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u8FragDataLength = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(sub_tree, hf_pn_rt_frag_data_length, tvb, offset, 1, u8FragDataLength);
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offset += 1;
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status_item = proto_tree_add_item(sub_tree, hf_pn_rt_frag_status, tvb, offset, 1, ENC_NA);
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status_tree = proto_item_add_subtree(status_item, ett_pn_rt_frag_status);
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u8FragStatus = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(status_tree, hf_pn_rt_frag_status_more_follows, tvb, offset, 1, u8FragStatus);
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proto_tree_add_uint(status_tree, hf_pn_rt_frag_status_error, tvb, offset, 1, u8FragStatus);
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proto_tree_add_uint(status_tree, hf_pn_rt_frag_status_fragment_number, tvb, offset, 1, u8FragStatus);
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offset += 1;
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proto_item_append_text(status_item, ": Number: %u, %s, %s",
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u8FragStatus & 0x3F,
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val_to_str( (u8FragStatus & 0x80) >> 7, pn_rt_frag_status_more_follows, "Unknown"),
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val_to_str( (u8FragStatus & 0x40) >> 6, pn_rt_frag_status_error, "Unknown"));
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proto_tree_add_string_format(sub_tree, hf_pn_rt_frag_data, tvb, offset, tvb_length(tvb) - offset, "data",
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"FragData: %d bytes", tvb_length(tvb) - offset);
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/* note: the actual defragmentation implementation is still missing here */
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dissect_pn_undecoded(tvb, offset, pinfo, sub_tree, tvb_length(tvb) - offset);
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return TRUE;
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}
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return FALSE;
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}
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/*
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* dissect_pn_rt - The dissector for the Soft-Real-Time protocol
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*/
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static void
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dissect_pn_rt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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gint pdu_len;
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gint data_len;
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guint16 u16FrameID;
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guint8 u8DataStatus;
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guint8 u8TransferStatus;
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guint16 u16CycleCounter;
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const gchar *pszProtAddInfo;
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const gchar *pszProtShort;
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const gchar *pszProtSummary;
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const gchar *pszProtComment;
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proto_tree *pn_rt_tree, *ti;
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gchar szFieldSummary[100];
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tvbuff_t *next_tvb;
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gboolean bCyclic;
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/* If the link-layer dissector for the protocol above us knows whether
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* the packet, as handed to it, includes a link-layer FCS, what it
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* hands to us should not include the FCS; if that's not the case,
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* that's a bug in that dissector, and should be fixed there.
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*
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* If the link-layer dissector for the protocol above us doesn't know
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* whether the packet, as handed to us, includes a link-layer FCS,
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* there are limits as to what can be done there; the dissector
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* ultimately needs a "yes, it has an FCS" preference setting, which
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* both the Ethernet and 802.11 dissectors do. If that's not the case
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* for a dissector, that's a deficiency in that dissector, and should
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* be fixed there.
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*
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* Therefore, we assume we are not handed a packet that includes an
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* FCS. If we are ever handed such a packet, either the link-layer
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* dissector needs to be fixed or the link-layer dissector's preference
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* needs to be set for your capture (even if that means adding such
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* a preference). This dissector (and other dissectors for protcols
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* running atop the link layer) should not attempt to process the
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* FCS themselves, as that will just break things. */
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/* Initialize variables */
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pn_rt_tree = NULL;
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ti = NULL;
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/*
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* Set the columns now, so that they'll be set correctly if we throw
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* an exception. We can set them (or append things) later again ....
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*/
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "PN-RT");
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col_set_str(pinfo->cinfo, COL_INFO, "PROFINET Real-Time");
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pdu_len = tvb_reported_length(tvb);
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if (pdu_len < 6) {
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dissect_pn_malformed(tvb, 0, pinfo, tree, pdu_len);
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return;
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}
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/* build some "raw" data */
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u16FrameID = tvb_get_ntohs(tvb, 0);
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if (u16FrameID <= 0x001F) {
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pszProtShort = "PN-RT";
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pszProtAddInfo = "reserved, ";
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pszProtSummary = "Real-Time";
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pszProtComment = "0x0000-0x001F: Reserved ID";
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bCyclic = FALSE;
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} else if (u16FrameID <= 0x0021) {
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pszProtShort = "PN-PTCP";
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pszProtAddInfo = "Synchronization, ";
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pszProtSummary = "Real-Time";
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pszProtComment = "0x0020-0x0021: Real-Time: Sync (with follow up)";
|
|
bCyclic = FALSE;
|
|
} else if (u16FrameID <= 0x007F) {
|
|
pszProtShort = "PN-RT";
|
|
pszProtAddInfo = "reserved, ";
|
|
pszProtSummary = "Real-Time";
|
|
pszProtComment = "0x0022-0x007F: Reserved ID";
|
|
bCyclic = FALSE;
|
|
} else if (u16FrameID <= 0x0081) {
|
|
pszProtShort = "PN-PTCP";
|
|
pszProtAddInfo = "Synchronization, ";
|
|
pszProtSummary = "Isochronous-Real-Time";
|
|
pszProtComment = "0x0080-0x0081: Real-Time: Sync (without follow up)";
|
|
bCyclic = FALSE;
|
|
} else if (u16FrameID <= 0x00FF) {
|
|
pszProtShort = "PN-RT";
|
|
pszProtAddInfo = "reserved, ";
|
|
pszProtSummary = "Real-Time";
|
|
pszProtComment = "0x0082-0x00FF: Reserved ID";
|
|
bCyclic = FALSE;
|
|
|
|
} else if (u16FrameID <= 0x6FF) {
|
|
pszProtShort = "PN-RTC3";
|
|
pszProtAddInfo = "RTC3, ";
|
|
pszProtSummary = "Isochronous-Real-Time";
|
|
pszProtComment = "0x0100-0x06FF: RED: Real-Time(class=3): non redundant, normal or DFP";
|
|
bCyclic = TRUE;
|
|
} else if (u16FrameID <= 0x0FFF){
|
|
pszProtShort = "PN-RTC3";
|
|
pszProtAddInfo = "RTC3, ";
|
|
pszProtSummary = "Isochronous-Real-Time";
|
|
pszProtComment = "0x0700-0x0FFF: RED: Real-Time(class=3): redundant, normal or DFP";
|
|
bCyclic = TRUE;
|
|
} else if (u16FrameID <= 0x7FFF) {
|
|
pszProtShort = "PN-RT";
|
|
pszProtAddInfo = "reserved, ";
|
|
pszProtSummary = "Real-Time";
|
|
pszProtComment = "0x1000-0x7FFF: Reserved ID";
|
|
bCyclic = FALSE;
|
|
} else if (u16FrameID <= 0xBBFF){
|
|
pszProtShort = "PN-RTC2";
|
|
pszProtAddInfo = "RTC2, ";
|
|
pszProtSummary = "cyclic Real-Time";
|
|
pszProtComment = "0x8000-0xBBFF: Real-Time(class=2): non redundant, normal";
|
|
bCyclic = TRUE;
|
|
} else if (u16FrameID <= 0xBFFF){
|
|
pszProtShort = "PN-RTC2";
|
|
pszProtAddInfo = "RTC2, ";
|
|
pszProtSummary = "cyclic Real-Time";
|
|
pszProtComment = "0xBC00-0xBFFF: Real-Time(class=2 multicast): non redundant, normal";
|
|
bCyclic = TRUE;
|
|
} else if (u16FrameID <= 0xF7FF){
|
|
pszProtShort = "PN-RTC1/UDP";
|
|
pszProtAddInfo = "RTC1/UDP, ";
|
|
pszProtSummary = "cyclic Real-Time";
|
|
pszProtComment = "0xC000-0xF7FF: Real-Time(class=1/UDP): Cyclic";
|
|
bCyclic = TRUE;
|
|
} else if (u16FrameID <= 0xFBFF){
|
|
pszProtShort = "PN-RTC1/UDP";
|
|
pszProtAddInfo = "Multicast, ";
|
|
pszProtSummary = "cyclic Real-Time";
|
|
pszProtComment = "0xF800-0xFBFF: Real-Time(class=1/UDP multicast): Cyclic";
|
|
bCyclic = TRUE;
|
|
} else if (u16FrameID <= 0xFDFF){
|
|
pszProtShort = "PN-RTA";
|
|
pszProtAddInfo = "Reserved, ";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "0xFC00-0xFDFF: Reserved";
|
|
bCyclic = FALSE;
|
|
if (u16FrameID == 0xfc01) {
|
|
pszProtShort = "PN-RTA";
|
|
pszProtAddInfo = "Alarm High, ";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "Real-Time: Acyclic PN-IO Alarm high priority";
|
|
}
|
|
|
|
} else if (u16FrameID <= 0xFEFF){
|
|
pszProtShort = "PN-RTA";
|
|
pszProtAddInfo = "Reserved, ";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "0xFE00-0xFEFF: Real-Time: Reserved";
|
|
bCyclic = FALSE;
|
|
if (u16FrameID == 0xFE01) {
|
|
pszProtShort = "PN-RTA";
|
|
pszProtAddInfo = "Alarm Low, ";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "Real-Time: Acyclic PN-IO Alarm low priority";
|
|
}
|
|
if (u16FrameID == FRAME_ID_DCP_HELLO) {
|
|
pszProtShort = "PN-RTA";
|
|
pszProtAddInfo = "";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) hello";
|
|
}
|
|
if (u16FrameID == FRAME_ID_DCP_GETORSET) {
|
|
pszProtShort = "PN-RTA";
|
|
pszProtAddInfo = "";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) get/set";
|
|
}
|
|
if (u16FrameID == FRAME_ID_DCP_IDENT_REQ) {
|
|
pszProtShort = "PN-RTA";
|
|
pszProtAddInfo = "";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) identify multicast request";
|
|
}
|
|
if (u16FrameID == FRAME_ID_DCP_IDENT_RES) {
|
|
pszProtShort = "PN-RTA";
|
|
pszProtAddInfo = "";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) identify response";
|
|
}
|
|
} else if (u16FrameID <= 0xFF01){
|
|
pszProtShort = "PN-PTCP";
|
|
pszProtAddInfo = "RTA Sync, ";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "0xFF00-0xFF01: PTCP Announce";
|
|
bCyclic = FALSE;
|
|
} else if (u16FrameID <= 0xFF1F){
|
|
pszProtShort = "PN-PTCP";
|
|
pszProtAddInfo = "RTA Sync, ";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "0xFF02-0xFF1F: Reserved";
|
|
bCyclic = FALSE;
|
|
} else if (u16FrameID <= 0xFF21){
|
|
pszProtShort = "PN-PTCP";
|
|
pszProtAddInfo = "Follow Up, ";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "0xFF20-0xFF21: PTCP Follow Up";
|
|
bCyclic = FALSE;
|
|
} else if (u16FrameID <= 0xFF22){
|
|
pszProtShort = "PN-PTCP";
|
|
pszProtAddInfo = "Follow Up, ";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "0xFF22-0xFF3F: Reserved";
|
|
bCyclic = FALSE;
|
|
} else if (u16FrameID <= 0xFF43){
|
|
pszProtShort = "PN-PTCP";
|
|
pszProtAddInfo = "Delay, ";
|
|
pszProtSummary = "acyclic Real-Time";
|
|
pszProtComment = "0xFF40-0xFF43: Acyclic Real-Time: Delay";
|
|
bCyclic = FALSE;
|
|
} else if (u16FrameID <= 0xFF7F){
|
|
pszProtShort = "PN-RT";
|
|
pszProtAddInfo = "Reserved, ";
|
|
pszProtSummary = "Real-Time";
|
|
pszProtComment = "0xFF44-0xFF7F: reserved ID";
|
|
bCyclic = FALSE;
|
|
} else if (u16FrameID <= 0xFF8F){
|
|
pszProtShort = "PN-RT";
|
|
pszProtAddInfo = "Fragmentation, ";
|
|
pszProtSummary = "Real-Time";
|
|
pszProtComment = "0xFF80-0xFF8F: Fragmentation";
|
|
bCyclic = FALSE;
|
|
} else {
|
|
pszProtShort = "PN-RT";
|
|
pszProtAddInfo = "Reserved, ";
|
|
pszProtSummary = "Real-Time";
|
|
pszProtComment = "0xFF90-0xFFFF: reserved ID";
|
|
bCyclic = FALSE;
|
|
}
|
|
|
|
/* decode optional cyclic fields at the packet end and build the summary line */
|
|
if (bCyclic) {
|
|
/* cyclic transfer has cycle counter, data status and transfer status fields at the end */
|
|
u16CycleCounter = tvb_get_ntohs(tvb, pdu_len - 4);
|
|
u8DataStatus = tvb_get_guint8(tvb, pdu_len - 2);
|
|
u8TransferStatus = tvb_get_guint8(tvb, pdu_len - 1);
|
|
|
|
g_snprintf (szFieldSummary, sizeof(szFieldSummary),
|
|
"%sID:0x%04x, Len:%4u, Cycle:%5u (%s,%s,%s,%s)",
|
|
pszProtAddInfo, u16FrameID, pdu_len - 2 - 4, u16CycleCounter,
|
|
(u8DataStatus & 0x04) ? "Valid" : "Invalid",
|
|
(u8DataStatus & 0x01) ? "Primary" : "Backup",
|
|
(u8DataStatus & 0x20) ? "Ok" : "Problem",
|
|
(u8DataStatus & 0x10) ? "Run" : "Stop");
|
|
|
|
/* user data length is packet len - frame id - optional cyclic status fields */
|
|
data_len = pdu_len - 2 - 4;
|
|
} else {
|
|
/* satisfy the gcc compiler, so it won't throw an "uninitialized" warning */
|
|
u16CycleCounter = 0;
|
|
u8DataStatus = 0;
|
|
u8TransferStatus = 0;
|
|
|
|
/* acyclic transfer has no fields at the end */
|
|
g_snprintf (szFieldSummary, sizeof(szFieldSummary),
|
|
"%sID:0x%04x, Len:%4u",
|
|
pszProtAddInfo, u16FrameID, pdu_len - 2);
|
|
|
|
/* user data length is packet len - frame id field */
|
|
data_len = pdu_len - 2;
|
|
}
|
|
|
|
/* build protocol tree only, if tree is really used */
|
|
if (tree) {
|
|
/* build pn_rt protocol tree with summary line */
|
|
if (pn_rt_summary_in_tree) {
|
|
ti = proto_tree_add_protocol_format(tree, proto_pn_rt, tvb, 0, pdu_len,
|
|
"PROFINET %s, %s", pszProtSummary, szFieldSummary);
|
|
} else {
|
|
ti = proto_tree_add_item(tree, proto_pn_rt, tvb, 0, pdu_len, ENC_NA);
|
|
}
|
|
pn_rt_tree = proto_item_add_subtree(ti, ett_pn_rt);
|
|
|
|
/* add frame ID */
|
|
proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_frame_id, tvb,
|
|
0, 2, u16FrameID, "FrameID: 0x%04x (%s)", u16FrameID, pszProtComment);
|
|
|
|
if (bCyclic) {
|
|
/* add cycle counter */
|
|
proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_cycle_counter, tvb,
|
|
pdu_len - 4, 2, u16CycleCounter, "CycleCounter: %u", u16CycleCounter);
|
|
|
|
/* add data status subtree */
|
|
dissect_DataStatus(tvb, pdu_len - 2, tree, u8DataStatus);
|
|
|
|
/* add transfer status */
|
|
if (u8TransferStatus) {
|
|
proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_transfer_status, tvb,
|
|
pdu_len - 1, 1, u8TransferStatus,
|
|
"TransferStatus: 0x%02x (ignore this frame)", u8TransferStatus);
|
|
} else {
|
|
proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_transfer_status, tvb,
|
|
pdu_len - 1, 1, u8TransferStatus,
|
|
"TransferStatus: 0x%02x (OK)", u8TransferStatus);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* update column info now */
|
|
col_add_str(pinfo->cinfo, COL_INFO, szFieldSummary);
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, pszProtShort);
|
|
|
|
pinfo->private_data = GUINT_TO_POINTER( (guint32) u16FrameID);
|
|
|
|
/* get frame user data tvb (without header and footer) */
|
|
next_tvb = tvb_new_subset(tvb, 2, data_len, data_len);
|
|
|
|
/* ask heuristics, if some sub-dissector is interested in this packet payload */
|
|
if(!dissector_try_heuristic(heur_subdissector_list, next_tvb, pinfo, tree)) {
|
|
/*col_set_str(pinfo->cinfo, COL_INFO, "Unknown");*/
|
|
|
|
/* Oh, well, we don't know this; dissect it as data. */
|
|
dissect_pn_undecoded(next_tvb, 0, pinfo, tree, tvb_length(next_tvb));
|
|
}
|
|
}
|
|
|
|
|
|
/* Register all the bits needed by the filtering engine */
|
|
void
|
|
proto_register_pn_rt(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_pn_rt_frame_id, {
|
|
"FrameID", "pn_rt.frame_id", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_cycle_counter, {
|
|
"CycleCounter", "pn_rt.cycle_counter", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_data_status, {
|
|
"DataStatus", "pn_rt.ds", FT_UINT8, BASE_HEX, 0, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_data_status_ignore, {
|
|
"Ignore (1:Ignore/0:Evaluate)", "pn_rt.ds_ignore", FT_UINT8, BASE_HEX, 0, 0x80, NULL, HFILL }},
|
|
{ &hf_pn_rt_data_status_Reserved_2, {
|
|
"Reserved_2 (should be zero)", "pn_rt.ds_Reserved_2", FT_UINT8, BASE_HEX, 0, 0x40, NULL, HFILL }},
|
|
{ &hf_pn_rt_data_status_ok, {
|
|
"StationProblemIndicator (1:Ok/0:Problem)", "pn_rt.ds_ok", FT_UINT8, BASE_HEX, 0, 0x20, NULL, HFILL }},
|
|
{ &hf_pn_rt_data_status_operate, {
|
|
"ProviderState (1:Run/0:Stop)", "pn_rt.ds_operate", FT_UINT8, BASE_HEX, 0, 0x10, NULL, HFILL }},
|
|
{ &hf_pn_rt_data_status_res3, {
|
|
"Reserved_1 (should be zero)", "pn_rt.ds_res3", FT_UINT8, BASE_HEX, 0, 0x08, NULL, HFILL }},
|
|
{ &hf_pn_rt_data_status_valid, {
|
|
"DataValid (1:Valid/0:Invalid)", "pn_rt.ds_valid", FT_UINT8, BASE_HEX, 0, 0x04, NULL, HFILL }},
|
|
{ &hf_pn_rt_data_status_redundancy, {
|
|
"Redundancy", "pn_rt.ds_redundancy", FT_UINT8, BASE_HEX, VALS(pn_rt_ds_redundancy), 0x02, NULL, HFILL }},
|
|
{ &hf_pn_rt_data_status_primary, {
|
|
"State (1:Primary/0:Backup)", "pn_rt.ds_primary", FT_UINT8, BASE_HEX, 0, 0x01, NULL, HFILL }},
|
|
{ &hf_pn_rt_transfer_status,
|
|
{ "TransferStatus", "pn_rt.transfer_status", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_sf, {
|
|
"SubFrame", "pn_rt.sf", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_sf_crc16, {
|
|
"SFCRC16", "pn_rt.sf.crc16", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_sf_position, {
|
|
"Position", "pn_rt.sf.position", FT_UINT8, BASE_DEC, NULL, 0x7F, NULL, HFILL }},
|
|
{ &hf_pn_rt_sf_position_control, {
|
|
"Control", "pn_rt.sf.position_control", FT_UINT8, BASE_DEC, VALS(pn_rt_position_control), 0x80, NULL, HFILL }},
|
|
{ &hf_pn_rt_sf_data_length, {
|
|
"DataLength", "pn_rt.sf.data_length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_sf_cycle_counter, {
|
|
"CycleCounter", "pn_rt.sf.cycle_counter", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_frag, {
|
|
"PROFINET Real-Time Fragment", "pn_rt.frag", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_frag_data_length, {
|
|
"FragDataLength", "pn_rt.frag_data_length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_frag_status, {
|
|
"FragStatus", "pn_rt.frag_status", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_rt_frag_status_more_follows, {
|
|
"MoreFollows", "pn_rt.frag_status.more_follows", FT_UINT8, BASE_HEX, VALS(pn_rt_frag_status_more_follows), 0x80, NULL, HFILL }},
|
|
{ &hf_pn_rt_frag_status_error, {
|
|
"Error", "pn_rt.frag_status.error", FT_UINT8, BASE_HEX, VALS(pn_rt_frag_status_error), 0x40, NULL, HFILL }},
|
|
{ &hf_pn_rt_frag_status_fragment_number, {
|
|
"FragmentNumber (zero based)", "pn_rt.frag_status.fragment_number", FT_UINT8, BASE_DEC, NULL, 0x3F, NULL, HFILL }},
|
|
{ &hf_pn_rt_frag_data, {
|
|
"FragData", "pn_rt.frag_data", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_pn_rt,
|
|
&ett_pn_rt_data_status,
|
|
&ett_pn_rt_sf,
|
|
&ett_pn_rt_frag,
|
|
&ett_pn_rt_frag_status
|
|
};
|
|
module_t *pn_rt_module;
|
|
|
|
proto_pn_rt = proto_register_protocol("PROFINET Real-Time Protocol",
|
|
"PN-RT", "pn_rt");
|
|
|
|
proto_register_field_array(proto_pn_rt, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* Register our configuration options */
|
|
|
|
pn_rt_module = prefs_register_protocol(proto_pn_rt, NULL);
|
|
|
|
prefs_register_bool_preference(pn_rt_module, "summary_in_tree",
|
|
"Show PN-RT summary in protocol tree",
|
|
"Whether the PN-RT summary line should be shown in the protocol tree",
|
|
&pn_rt_summary_in_tree);
|
|
|
|
/* register heuristics anchor for payload dissectors */
|
|
register_heur_dissector_list("pn_rt", &heur_subdissector_list);
|
|
|
|
init_pn (proto_pn_rt);
|
|
}
|
|
|
|
|
|
/* The registration hand-off routine is called at startup */
|
|
void
|
|
proto_reg_handoff_pn_rt(void)
|
|
{
|
|
dissector_handle_t pn_rt_handle;
|
|
|
|
pn_rt_handle = create_dissector_handle(dissect_pn_rt, proto_pn_rt);
|
|
|
|
dissector_add_uint("ethertype", ETHERTYPE_PROFINET, pn_rt_handle);
|
|
dissector_add_uint("udp.port", 0x8892, pn_rt_handle);
|
|
|
|
heur_dissector_add("pn_rt", dissect_CSF_SDU_heur, proto_pn_rt);
|
|
heur_dissector_add("pn_rt", dissect_FRAG_PDU_heur, proto_pn_rt);
|
|
}
|
|
|