epan/dissectors/packet-sscf-nni.c

   1 /* packet-sscf-nni.c
   2  * Routines for SSCF-NNI (Q.2140) frame disassembly
   3  * Jeff Morriss <jeff.morriss[AT]ulticom.com>
   4  *
   5  * $Id:$
   6  *
   7  * Ethereal - Network traffic analyzer
   8  * By Gerald Combs <gerald@ethereal.com>
   9  * Copyright 1998
  10  *
  11  * Copied from packet-sscop.c
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  26  */
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <stdio.h>
  33 #include <glib.h>
  34 #include <string.h>
  35 #include <epan/packet.h>
  36
  37 static int proto_sscf = -1;
  38
  39 static gint ett_sscf = -1;
  40
  41 static dissector_handle_t mtp3_handle;
  42 static dissector_handle_t data_handle;
  43
  44 #define SSCF_PDU_LENGTH 4
  45 #define SSCF_STATUS_OFFSET 3
  46 #define SSCF_STATUS_LENGTH 1
  47 #define SSCF_SPARE_OFFSET 0
  48 #define SSCF_SPARE_LENGTH 3
  49
  50 static int hf_status = -1;
  51 static int hf_spare = -1;
  52
  53 #define SSCF_STATUS_OOS 0x01
  54 #define SSCF_STATUS_PO  0x02
  55 #define SSCF_STATUS_IS  0x03
  56 #define SSCF_STATUS_NORMAL 0x04
  57 #define SSCF_STATUS_EMERGENCY 0x05
  58 #define SSCF_STATUS_ALIGNMENT_NOT_SUCCESSFUL 0x7
  59 #define SSCF_STATUS_MANAGEMENT_INITIATED 0x08
  60 #define SSCF_STATUS_PROTOCOL_ERROR 0x09
  61 #define SSCF_STATUS_PROVING_NOT_SUCCESSFUL 0x0a
  62
  63 static const value_string sscf_status_vals[] = {
  64         { SSCF_STATUS_OOS,                      "Out of Service" },
  65         { SSCF_STATUS_PO,                       "Processor Outage" },
  66         { SSCF_STATUS_IS,                       "In Service" },
  67         { SSCF_STATUS_NORMAL,                   "Normal" },
  68         { SSCF_STATUS_EMERGENCY,                "Emergency" },
  69         { SSCF_STATUS_ALIGNMENT_NOT_SUCCESSFUL, "Alignment Not Successful" },
  70         { SSCF_STATUS_MANAGEMENT_INITIATED,     "Management Initiated" },
  71         { SSCF_STATUS_PROTOCOL_ERROR,           "Protocol Error" },
  72         { SSCF_STATUS_PROVING_NOT_SUCCESSFUL,   "Proving Not Successful" },
  73         { 0,                                    NULL }
  74 };
  75
  76 static void
  77 dissect_sscf_nni(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  78 {
  79   guint reported_length;
  80   proto_item *sscf_item = NULL;
  81   proto_tree *sscf_tree = NULL;
  82   guint8 sscf_status;
  83
  84   reported_length = tvb_reported_length(tvb);   /* frame length */
  85
  86   if (tree) {
  87     sscf_item = proto_tree_add_item(tree, proto_sscf, tvb, 0, -1, FALSE);
  88     sscf_tree = proto_item_add_subtree(sscf_item, ett_sscf);
  89   }
  90
  91   if (reported_length > SSCF_PDU_LENGTH)
  92   {
  93     call_dissector(mtp3_handle, tvb, pinfo, tree);
  94
  95   } else {
  96
  97     sscf_status = tvb_get_guint8(tvb, SSCF_STATUS_OFFSET);
  98
  99     if (check_col(pinfo->cinfo, COL_PROTOCOL))
 100       col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSCF-NNI");
 101     if (check_col(pinfo->cinfo, COL_INFO))
 102       col_add_fstr(pinfo->cinfo, COL_INFO, "STATUS (%s) ",
 103                    val_to_str(sscf_status, sscf_status_vals, "Unknown"));
 104
 105
 106     proto_tree_add_item(sscf_tree, hf_status, tvb, SSCF_STATUS_OFFSET,
 107                         SSCF_STATUS_LENGTH, FALSE);
 108     proto_tree_add_item(sscf_tree, hf_spare, tvb, SSCF_SPARE_OFFSET,
 109                         SSCF_SPARE_LENGTH, FALSE);
 110   }
 111
 112 }
 113
 114 void
 115 proto_register_sscf(void)
 116 {
 117   static hf_register_info hf[] =
 118   { { &hf_status, { "Status", "sscf-nni.status", FT_UINT8, BASE_HEX,
 119                     VALS(sscf_status_vals), 0x0, "", HFILL} },
 120     { &hf_spare, { "Spare", "sscf-nni.spare", FT_UINT24, BASE_HEX,
 121                     NULL, 0x0, "", HFILL} }
 122   };
 123
 124   static gint *ett[] = {
 125     &ett_sscf,
 126   };
 127
 128   proto_sscf = proto_register_protocol("SSCF-NNI", "SSCF-NNI", "sscf-nni");
 129
 130   proto_register_field_array(proto_sscf, hf, array_length(hf));
 131   proto_register_subtree_array(ett, array_length(ett));
 132
 133   register_dissector("sscf-nni", dissect_sscf_nni, proto_sscf);
 134
 135 }
 136
 137 void
 138 proto_reg_handoff_sscf(void)
 139 {
 140   static dissector_handle_t sscf_handle;
 141
 142
 143   sscf_handle = create_dissector_handle(dissect_sscf_nni, proto_sscf);
 144
 145   mtp3_handle = find_dissector("mtp3");
 146   data_handle = find_dissector("data");
 147
 148 }