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  * Wireshark - Network traffic analyzer
  11  * By Gerald Combs <gerald@wireshark.org>
  12  * Copyright 1998 Gerald Combs
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  27  * USA.
  28  */
  29
  30 #include "config.h"
  31
  32 #include <epan/packet.h>
  33 #include <epan/etypes.h>
  34
  35 #include "packet-tte.h"
  36
  37 void proto_register_tte_pcf(void);
  38 void proto_reg_handoff_tte_pcf(void);
  39
  40 /* Initialize the protocol and registered fields */
  41 static int proto_tte_pcf = -1;
  42
  43 static int hf_tte_pcf_ic = -1;
  44 static int hf_tte_pcf_mn = -1;
  45 /* static int hf_tte_pcf_res0 = -1; */
  46 static int hf_tte_pcf_sp = -1;
  47 static int hf_tte_pcf_sd = -1;
  48 static int hf_tte_pcf_type = -1;
  49 /* static int hf_tte_pcf_res1 = -1; */
  50 static int hf_tte_pcf_tc = -1;
  51
  52 /* Initialize the subtree pointers */
  53 static gint ett_tte_pcf = -1;
  54
  55 static const value_string pcf_type_str_vals[] =
  56     { {2, "integration frame"}
  57     , {4, "coldstart frame"}
  58     , {8, "coldstart ack frame"}
  59     , {0, NULL}
  60     };
  61
  62
  63 /* Code to actually dissect the packets */
  64 static void
  65 dissect_tte_pcf(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  66 {
  67     /* Set up structures needed to add the protocol subtree and manage it */
  68     proto_item *tte_pcf_root_item;
  69     proto_tree *tte_pcf_tree;
  70
  71     /* variables used to store the fields displayed in the info_column */
  72     guint8 sync_priority = 0;
  73     guint8 sync_domain   = 0;
  74
  75     /* Check that there's enough data */
  76     if (tvb_reported_length(tvb) < TTE_PCF_LENGTH )
  77     {
  78         return;
  79     }
  80
  81     /* get sync_priority and sync_domain */
  82     sync_priority = tvb_get_guint8(tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
  83         TTE_PCF_RES0_LENGTH);
  84     sync_domain = tvb_get_guint8(tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
  85         TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH);
  86
  87     /* Make entries in Protocol column and Info column on summary display */
  88     col_set_str(pinfo->cinfo, COL_PROTOCOL, "PCF");
  89
  90     col_add_fstr(pinfo->cinfo, COL_INFO,
  91             "Sync Domain: 0x%02X  Sync Priority: 0x%02X",
  92             sync_domain, sync_priority);
  93
  94     if (tree) {
  95
  96         /* create display subtree for the protocol */
  97         tte_pcf_root_item = proto_tree_add_item(tree, proto_tte_pcf, tvb, 0,
  98             TTE_PCF_LENGTH, ENC_NA);
  99
 100         tte_pcf_tree = proto_item_add_subtree(tte_pcf_root_item, ett_tte_pcf);
 101
 102         proto_tree_add_item(tte_pcf_tree,
 103             hf_tte_pcf_ic, tvb, 0, TTE_PCF_IC_LENGTH, ENC_BIG_ENDIAN);
 104
 105         proto_tree_add_item(tte_pcf_tree,
 106             hf_tte_pcf_mn, tvb, TTE_PCF_IC_LENGTH, TTE_PCF_MN_LENGTH, ENC_BIG_ENDIAN);
 107
 108      /* RESERVED FIELD --- will not be displayed */
 109      /* proto_tree_add_item(tte_pcf_tree,
 110             hf_tte_pcf_res0, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH,
 111             TTE_PCF_RES0_LENGTH, ENC_BIG_ENDIAN); */
 112
 113         proto_tree_add_item(tte_pcf_tree,
 114             hf_tte_pcf_sp, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
 115             TTE_PCF_RES0_LENGTH, TTE_PCF_SP_LENGTH, ENC_BIG_ENDIAN);
 116
 117         proto_tree_add_item(tte_pcf_tree,
 118             hf_tte_pcf_sd, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
 119             TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH, TTE_PCF_SD_LENGTH, ENC_BIG_ENDIAN);
 120
 121         proto_tree_add_item(tte_pcf_tree,
 122             hf_tte_pcf_type, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
 123             TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH+TTE_PCF_SD_LENGTH,
 124             TTE_PCF_TYPE_LENGTH, ENC_BIG_ENDIAN);
 125
 126      /* RESERVED FIELD --- will not be displayed */
 127      /* proto_tree_add_item(tte_pcf_tree,
 128             hf_tte_pcf_res1, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
 129             TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH+TTE_PCF_SD_LENGTH+
 130             TTE_PCF_TYPE_LENGTH, TTE_PCF_RES1_LENGTH, ENC_NA); */
 131
 132         proto_tree_add_item(tte_pcf_tree,
 133             hf_tte_pcf_tc, 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, TTE_PCF_TC_LENGTH, ENC_BIG_ENDIAN);
 136     }
 137
 138 }
 139
 140
 141 void
 142 proto_register_tte_pcf(void)
 143 {
 144     static hf_register_info hf[] = {
 145
 146         { &hf_tte_pcf_ic,
 147             { "Integration Cycle", "tte_pcf.ic",
 148             FT_UINT32, BASE_HEX, NULL, 0x0,
 149             NULL, HFILL }
 150         },
 151             { &hf_tte_pcf_mn,
 152             { "Membership New", "tte_pcf.mn",
 153             FT_UINT32, BASE_HEX, NULL, 0x0,
 154             NULL, HFILL }
 155         },
 156 #if 0
 157             { &hf_tte_pcf_res0,
 158             { "Reserved 0", "tte_pcf.res0",
 159             FT_UINT32, BASE_HEX, NULL, 0x0,
 160             NULL, HFILL }
 161         },
 162 #endif
 163         { &hf_tte_pcf_sp,
 164             { "Sync Priority", "tte_pcf.sp",
 165             FT_UINT8, BASE_HEX, NULL, 0x0,
 166             NULL, HFILL }
 167         },
 168         { &hf_tte_pcf_sd,
 169             { "Sync Domain", "tte_pcf.sd",
 170             FT_UINT8, BASE_HEX, NULL, 0x0,
 171             NULL, HFILL }
 172         },
 173         { &hf_tte_pcf_type,
 174             { "Type", "tte_pcf.type",
 175             FT_UINT8, BASE_HEX, VALS(pcf_type_str_vals), 0x0F,
 176             NULL, HFILL }
 177         },
 178 #if 0
 179         { &hf_tte_pcf_res1,
 180             { "Reserved 1", "tte_pcf.res1",
 181             FT_BYTES, BASE_NONE, NULL, 0x0,
 182             NULL, HFILL }
 183         },
 184 #endif
 185         { &hf_tte_pcf_tc,
 186             { "Transparent Clock", "tte_pcf.tc",
 187             FT_UINT64, BASE_HEX, NULL, 0x0,
 188             NULL, HFILL }
 189         }
 190     };
 191
 192     /* Setup protocol subtree array */
 193     static gint *ett[] = {
 194         &ett_tte_pcf
 195     };
 196
 197     /* Register the protocol name and description */
 198     proto_tte_pcf = proto_register_protocol("TTEthernet Protocol Control Frame",
 199         "TTE PCF", "tte_pcf");
 200
 201     /* Required function calls to register header fields and subtrees used */
 202     proto_register_field_array(proto_tte_pcf, hf, array_length(hf));
 203     proto_register_subtree_array(ett, array_length(ett));
 204
 205     register_dissector("tte_pcf", dissect_tte_pcf, proto_tte_pcf);
 206
 207 }
 208
 209
 210 void
 211 proto_reg_handoff_tte_pcf(void)
 212 {
 213     dissector_handle_t tte_pcf_handle;
 214
 215     /* initialize the pcf handle */
 216     tte_pcf_handle = find_dissector("tte_pcf");
 217
 218     dissector_add_uint("ethertype", ETHERTYPE_TTE_PCF, tte_pcf_handle);
 219
 220 }
 221
 222 /*
 223  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 224  *
 225  * Local variables:
 226  * c-basic-offset: 4
 227  * tab-width: 8
 228  * indent-tabs-mode: nil
 229  * End:
 230  *
 231  * vi: set shiftwidth=4 tabstop=8 expandtab:
 232  * :indentSize=4:tabSize=8:noTabs=true:
 233  */