epan/dissectors/packet-tte-pcf.c

   1 /* packet-tte-pcf.c
   2  * Routines for Time Triggered Ethernet Protocol Control Frame dissection
   3  *
   4  * Author: Valentin Ecker
   5  * Author: Benjamin Roch, benjamin.roch (AT) tttech.com
   6  *
   7  * TTTech Computertechnik AG, Austria.
   8  * http://www.tttech.com/solutions/ttethernet/
   9  *
  10  * $Id$
  11  *
  12  * Wireshark - Network traffic analyzer
  13  * By Gerald Combs <gerald@wireshark.org>
  14  * Copyright 1998 Gerald Combs
  15  *
  16  * This program is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU General Public License
  18  * as published by the Free Software Foundation; either version 2
  19  * of the License, or (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  29  * USA.
  30  */
  31
  32 #ifdef HAVE_CONFIG_H
  33  #include "config.h"
  34 #endif
  35
  36 #include <stdlib.h>
  37 #include <glib.h>
  38
  39 #include <epan/packet.h>
  40 #include <epan/etypes.h>
  41
  42 #include "packet-tte.h"
  43
  44 /* Initialize the protocol and registered fields */
  45 static int proto_tte_pcf = -1;
  46
  47 static int hf_tte_pcf = -1;
  48 static int hf_tte_pcf_ic = -1;
  49 static int hf_tte_pcf_mn = -1;
  50 static int hf_tte_pcf_res0 = -1;
  51 static int hf_tte_pcf_sp = -1;
  52 static int hf_tte_pcf_sd = -1;
  53 static int hf_tte_pcf_type = -1;
  54 static int hf_tte_pcf_res1 = -1;
  55 static int hf_tte_pcf_tc = -1;
  56
  57 /* Initialize the subtree pointers */
  58 static gint ett_tte_pcf = -1;
  59
  60 static const value_string pcf_type_str_vals[] =
  61     { {2, "integration frame"}
  62     , {4, "coldstart frame"}
  63     , {8, "coldstart ack frame"}
  64     , {0, NULL}
  65     };
  66
  67
  68 /* Code to actually dissect the packets */
  69 static void
  70 dissect_tte_pcf(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  71 {
  72     /* Set up structures needed to add the protocol subtree and manage it */
  73     proto_item *tte_pcf_root_item;
  74     proto_tree *tte_pcf_tree;
  75
  76     /* variables used to store the fields displayed in the info_column */
  77     guint8 sync_priority = 0;
  78     guint8 sync_domain   = 0;
  79
  80     /* Check that there's enough data */
  81     if (tvb_length(tvb) < TTE_PCF_LENGTH )
  82     {
  83         return;
  84     }
  85
  86     /* get sync_priority and sync_domain */
  87     sync_priority = tvb_get_guint8(tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
  88         TTE_PCF_RES0_LENGTH);
  89     sync_domain = tvb_get_guint8(tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
  90         TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH);
  91
  92     /* Make entries in Protocol column and Info column on summary display */
  93     col_set_str(pinfo->cinfo, COL_PROTOCOL, "PCF");
  94
  95     col_add_fstr(pinfo->cinfo, COL_INFO,
  96             "Sync Domain: 0x%02X  Sync Priority: 0x%02X",
  97             sync_domain, sync_priority);
  98
  99     if (tree) {
 100
 101         /* create display subtree for the protocol */
 102         tte_pcf_root_item = proto_tree_add_item(tree, proto_tte_pcf, tvb, 0,
 103             TTE_PCF_LENGTH, FALSE);
 104
 105         tte_pcf_tree = proto_item_add_subtree(tte_pcf_root_item, ett_tte_pcf);
 106
 107         proto_tree_add_item(tte_pcf_tree,
 108             hf_tte_pcf_ic, tvb, 0, TTE_PCF_IC_LENGTH, FALSE);
 109
 110         proto_tree_add_item(tte_pcf_tree,
 111             hf_tte_pcf_mn, tvb, TTE_PCF_IC_LENGTH, TTE_PCF_MN_LENGTH, FALSE);
 112
 113      /* RESERVED FIELD --- will not be displayed */
 114      /* proto_tree_add_item(tte_pcf_tree,
 115             hf_tte_pcf_res0, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH,
 116             TTE_PCF_RES0_LENGTH, FALSE); */
 117
 118         proto_tree_add_item(tte_pcf_tree,
 119             hf_tte_pcf_sp, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
 120             TTE_PCF_RES0_LENGTH, TTE_PCF_SP_LENGTH, FALSE);
 121
 122         proto_tree_add_item(tte_pcf_tree,
 123             hf_tte_pcf_sd, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
 124             TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH, TTE_PCF_SD_LENGTH, FALSE);
 125
 126         proto_tree_add_item(tte_pcf_tree,
 127             hf_tte_pcf_type, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
 128             TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH+TTE_PCF_SD_LENGTH,
 129             TTE_PCF_TYPE_LENGTH, FALSE);
 130
 131      /* RESERVED FIELD --- will not be displayed */
 132      /* proto_tree_add_item(tte_pcf_tree,
 133             hf_tte_pcf_res1, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
 134             TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH+TTE_PCF_SD_LENGTH+
 135             TTE_PCF_TYPE_LENGTH, TTE_PCF_RES1_LENGTH, FALSE); */
 136
 137         proto_tree_add_item(tte_pcf_tree,
 138             hf_tte_pcf_tc, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
 139             TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH+TTE_PCF_SD_LENGTH+
 140             TTE_PCF_TYPE_LENGTH+TTE_PCF_RES1_LENGTH, TTE_PCF_TC_LENGTH, FALSE);
 141     }
 142
 143 }
 144
 145
 146 void
 147 proto_register_tte_pcf(void)
 148 {
 149     static hf_register_info hf[] = {
 150
 151         { &hf_tte_pcf,
 152             { "Protocol Control Frame", "tte.pcf",
 153             FT_BYTES, BASE_NONE, NULL, 0x0,
 154             NULL, HFILL }
 155         },
 156         { &hf_tte_pcf_ic,
 157             { "Integration Cycle", "tte.pcf.ic",
 158             FT_UINT32, BASE_HEX, NULL, 0x0,
 159             NULL, HFILL }
 160         },
 161             { &hf_tte_pcf_mn,
 162             { "Membership New", "tte.pcf.mn",
 163             FT_UINT32, BASE_HEX, NULL, 0x0,
 164             NULL, HFILL }
 165         },
 166             { &hf_tte_pcf_res0,
 167             { "Reserved 0", "tte.pcf.res0",
 168             FT_UINT32, BASE_HEX, NULL, 0x0,
 169             NULL, HFILL }
 170         },
 171         { &hf_tte_pcf_sp,
 172             { "Sync Priority", "tte.pcf.sp",
 173             FT_UINT8, BASE_HEX, NULL, 0x0,
 174             NULL, HFILL }
 175         },
 176         { &hf_tte_pcf_sd,
 177             { "Sync Domain", "tte.pcf.sd",
 178             FT_UINT8, BASE_HEX, NULL, 0x0,
 179             NULL, HFILL }
 180         },
 181         { &hf_tte_pcf_type,
 182             { "Type", "tte.pcf.type",
 183             FT_UINT8, BASE_HEX, VALS(pcf_type_str_vals), 0x0F,
 184             NULL, HFILL }
 185         },
 186         { &hf_tte_pcf_res1,
 187             { "Reserved 1", "tte.pcf.res1",
 188             FT_BYTES, BASE_NONE, NULL, 0x0,
 189             NULL, HFILL }
 190         },
 191         { &hf_tte_pcf_tc,
 192             { "Transparent Clock", "tte.pcf.tc",
 193             FT_UINT64, BASE_HEX, NULL, 0x0,
 194             NULL, HFILL }
 195         }
 196     };
 197
 198     /* Setup protocol subtree array */
 199     static gint *ett[] = {
 200         &ett_tte_pcf
 201     };
 202
 203     /* Register the protocol name and description */
 204     proto_tte_pcf = proto_register_protocol("TTEthernet Protocol Control Frame",
 205         "TTE PCF", "tte_pcf");
 206
 207     /* Required function calls to register header fields and subtrees used */
 208     proto_register_field_array(proto_tte_pcf, hf, array_length(hf));
 209     proto_register_subtree_array(ett, array_length(ett));
 210
 211     register_dissector("tte_pcf", dissect_tte_pcf, proto_tte_pcf);
 212
 213 }
 214
 215
 216 void
 217 proto_reg_handoff_tte_pcf(void)
 218 {
 219     dissector_handle_t tte_pcf_handle;
 220
 221     /* initialize the pcf handle */
 222     tte_pcf_handle = find_dissector("tte_pcf");
 223
 224     dissector_add("ethertype", ETHERTYPE_TTE_PCF, tte_pcf_handle);
 225
 226 }
 227