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.ws [AT] gmail.com>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #include "config.h"
  29
  30 #include <glib.h>
  31 #include <epan/packet.h>
  32
  33 static int proto_sscf = -1;
  34
  35 static gint ett_sscf = -1;
  36
  37 static dissector_handle_t mtp3_handle;
  38
  39 #define SSCF_PDU_LENGTH 4
  40 #define SSCF_STATUS_OFFSET 3
  41 #define SSCF_STATUS_LENGTH 1
  42 #define SSCF_SPARE_OFFSET 0
  43 #define SSCF_SPARE_LENGTH 3
  44
  45 static int hf_status = -1;
  46 static int hf_spare = -1;
  47
  48 #define SSCF_STATUS_OOS 0x01
  49 #define SSCF_STATUS_PO  0x02
  50 #define SSCF_STATUS_IS  0x03
  51 #define SSCF_STATUS_NORMAL 0x04
  52 #define SSCF_STATUS_EMERGENCY 0x05
  53 #define SSCF_STATUS_ALIGNMENT_NOT_SUCCESSFUL 0x7
  54 #define SSCF_STATUS_MANAGEMENT_INITIATED 0x08
  55 #define SSCF_STATUS_PROTOCOL_ERROR 0x09
  56 #define SSCF_STATUS_PROVING_NOT_SUCCESSFUL 0x0a
  57
  58 static const value_string sscf_status_vals[] = {
  59         { SSCF_STATUS_OOS,                      "Out of Service" },
  60         { SSCF_STATUS_PO,                       "Processor Outage" },
  61         { SSCF_STATUS_IS,                       "In Service" },
  62         { SSCF_STATUS_NORMAL,                   "Normal" },
  63         { SSCF_STATUS_EMERGENCY,                "Emergency" },
  64         { SSCF_STATUS_ALIGNMENT_NOT_SUCCESSFUL, "Alignment Not Successful" },
  65         { SSCF_STATUS_MANAGEMENT_INITIATED,     "Management Initiated" },
  66         { SSCF_STATUS_PROTOCOL_ERROR,           "Protocol Error" },
  67         { SSCF_STATUS_PROVING_NOT_SUCCESSFUL,   "Proving Not Successful" },
  68         { 0,                                    NULL }
  69 };
  70
  71 static void
  72 dissect_sscf_nni(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  73 {
  74   guint reported_length;
  75   proto_item *sscf_item = NULL;
  76   proto_tree *sscf_tree = NULL;
  77   guint8 sscf_status;
  78
  79   reported_length = tvb_reported_length(tvb);   /* frame length */
  80
  81   if (tree) {
  82     sscf_item = proto_tree_add_item(tree, proto_sscf, tvb, 0, -1, ENC_NA);
  83     sscf_tree = proto_item_add_subtree(sscf_item, ett_sscf);
  84   }
  85
  86   if (reported_length > SSCF_PDU_LENGTH)
  87   {
  88     call_dissector(mtp3_handle, tvb, pinfo, tree);
  89
  90   } else {
  91
  92     sscf_status = tvb_get_guint8(tvb, SSCF_STATUS_OFFSET);
  93
  94     col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSCF-NNI");
  95     col_add_fstr(pinfo->cinfo, COL_INFO, "STATUS (%s) ",
  96                    val_to_str_const(sscf_status, sscf_status_vals, "Unknown"));
  97
  98
  99     proto_tree_add_item(sscf_tree, hf_status, tvb, SSCF_STATUS_OFFSET,
 100                         SSCF_STATUS_LENGTH, ENC_BIG_ENDIAN);
 101     proto_tree_add_item(sscf_tree, hf_spare, tvb, SSCF_SPARE_OFFSET,
 102                         SSCF_SPARE_LENGTH, ENC_BIG_ENDIAN);
 103   }
 104
 105 }
 106
 107 void
 108 proto_register_sscf(void)
 109 {
 110   static hf_register_info hf[] =
 111   { { &hf_status, { "Status", "sscf-nni.status", FT_UINT8, BASE_HEX,
 112                     VALS(sscf_status_vals), 0x0, NULL, HFILL} },
 113     { &hf_spare, { "Spare", "sscf-nni.spare", FT_UINT24, BASE_HEX,
 114                     NULL, 0x0, NULL, HFILL} }
 115   };
 116
 117   static gint *ett[] = {
 118     &ett_sscf,
 119   };
 120
 121   proto_sscf = proto_register_protocol("SSCF-NNI", "SSCF-NNI", "sscf-nni");
 122
 123   proto_register_field_array(proto_sscf, hf, array_length(hf));
 124   proto_register_subtree_array(ett, array_length(ett));
 125
 126   register_dissector("sscf-nni", dissect_sscf_nni, proto_sscf);
 127
 128 }
 129
 130 void
 131 proto_reg_handoff_sscf(void)
 132 {
 133   mtp3_handle = find_dissector("mtp3");
 134 }