plugins/epan/ethercat/packet-ioraw.c

   1 /* packet-ioraw.c
   2  * Routines for ethercat packet disassembly
   3  *
   4  * Copyright (c) 2007 by Beckhoff Automation GmbH
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * SPDX-License-Identifier: GPL-2.0-or-later
  11  */
  12
  13 /* Include files */
  14
  15 #include "config.h"
  16
  17 #include <epan/packet.h>
  18
  19 #include "packet-ioraw.h"
  20
  21 void proto_register_ioraw(void);
  22 void proto_reg_handoff_ioraw(void);
  23
  24 /* Define the ioraw proto */
  25 int proto_ioraw;
  26
  27 static int ett_ioraw;
  28
  29 static dissector_handle_t ioraw_handle;
  30
  31 /* static int hf_ioraw_summary; */
  32 static int hf_ioraw_header;
  33 static int hf_ioraw_data;
  34
  35 /*ioraw*/
  36 static void IoRawSummaryFormater( char *szText, int nMax)
  37 {
  38    snprintf ( szText, nMax, "Raw IO Data" );
  39 }
  40
  41 static int dissect_ioraw(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
  42 {
  43    proto_item *ti;
  44    proto_tree *ioraw_tree;
  45    int offset = 0;
  46    char szText[200];
  47    int nMax = sizeof(szText)-1;
  48
  49    unsigned ioraw_length = tvb_reported_length(tvb);
  50
  51    col_set_str(pinfo->cinfo, COL_PROTOCOL, "IO-RAW");
  52
  53    IoRawSummaryFormater(szText, nMax);
  54    col_add_str(pinfo->cinfo, COL_INFO, szText);
  55
  56    if (tree)
  57    {
  58       ti = proto_tree_add_item(tree, proto_ioraw, tvb, 0, -1, ENC_NA);
  59       ioraw_tree = proto_item_add_subtree(ti, ett_ioraw);
  60
  61       proto_item_append_text(ti,": %s",szText);
  62       proto_tree_add_item(ioraw_tree, hf_ioraw_header, tvb, offset, IoRawParserHDR_Len, ENC_NA);
  63       offset+=IoRawParserHDR_Len;
  64
  65       proto_tree_add_item(ioraw_tree, hf_ioraw_data, tvb, offset, ioraw_length - offset, ENC_NA);
  66    }
  67    return tvb_captured_length(tvb);
  68 }
  69
  70 void proto_register_ioraw(void)
  71 {
  72    static hf_register_info hf[] =
  73       {
  74 #if 0
  75          { &hf_ioraw_summary,
  76            { "Summary of the IoRaw Packet", "ioraw.summary",
  77              FT_STRING, BASE_NONE, NULL, 0x0,
  78              NULL, HFILL }
  79          },
  80 #endif
  81          { &hf_ioraw_header, { "Header", "ioraw.header",
  82                                FT_NONE, BASE_NONE, NULL, 0x0,
  83                                NULL, HFILL }
  84          },
  85          { &hf_ioraw_data, { "VarData", "ioraw.data",
  86                              FT_NONE, BASE_NONE, NULL, 0x0,
  87                              NULL, HFILL }
  88          }
  89       };
  90
  91    static int *ett[] =
  92       {
  93          &ett_ioraw
  94       };
  95
  96    proto_ioraw = proto_register_protocol("TwinCAT IO-RAW",
  97                                          "IO-RAW","ioraw");
  98    proto_register_field_array(proto_ioraw,hf,array_length(hf));
  99    proto_register_subtree_array(ett,array_length(ett));
 100    ioraw_handle = register_dissector("ioraw", dissect_ioraw, proto_ioraw);
 101 }
 102
 103 void proto_reg_handoff_ioraw(void)
 104 {
 105    dissector_add_uint("ecatf.type", 3, ioraw_handle);
 106 }
 107
 108 /*
 109  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 110  *
 111  * Local Variables:
 112  * c-basic-offset: 3
 113  * tab-width: 8
 114  * indent-tabs-mode: nil
 115  * End:
 116  *
 117  * vi: set shiftwidth=3 tabstop=8 expandtab:
 118  * :indentSize=3:tabSize=8:noTabs=true:
 119  */