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  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998
   8  *
   9  * Copied from packet-sscop.c
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #include "config.h"
  27
  28 #include <glib.h>
  29 #include <epan/packet.h>
  30
  31 void proto_register_sscf(void);
  32 void proto_reg_handoff_sscf(void);
  33
  34 static int proto_sscf = -1;
  35
  36 static gint ett_sscf = -1;
  37
  38 static dissector_handle_t mtp3_handle;
  39
  40 #define SSCF_PDU_LENGTH 4
  41 #define SSCF_STATUS_OFFSET 3
  42 #define SSCF_STATUS_LENGTH 1
  43 #define SSCF_SPARE_OFFSET 0
  44 #define SSCF_SPARE_LENGTH 3
  45
  46 static int hf_status = -1;
  47 static int hf_spare = -1;
  48
  49 #define SSCF_STATUS_OOS 0x01
  50 #define SSCF_STATUS_PO  0x02
  51 #define SSCF_STATUS_IS  0x03
  52 #define SSCF_STATUS_NORMAL 0x04
  53 #define SSCF_STATUS_EMERGENCY 0x05
  54 #define SSCF_STATUS_ALIGNMENT_NOT_SUCCESSFUL 0x7
  55 #define SSCF_STATUS_MANAGEMENT_INITIATED 0x08
  56 #define SSCF_STATUS_PROTOCOL_ERROR 0x09
  57 #define SSCF_STATUS_PROVING_NOT_SUCCESSFUL 0x0a
  58
  59 static const value_string sscf_status_vals[] = {
  60         { SSCF_STATUS_OOS,                      "Out of Service" },
  61         { SSCF_STATUS_PO,                       "Processor Outage" },
  62         { SSCF_STATUS_IS,                       "In Service" },
  63         { SSCF_STATUS_NORMAL,                   "Normal" },
  64         { SSCF_STATUS_EMERGENCY,                "Emergency" },
  65         { SSCF_STATUS_ALIGNMENT_NOT_SUCCESSFUL, "Alignment Not Successful" },
  66         { SSCF_STATUS_MANAGEMENT_INITIATED,     "Management Initiated" },
  67         { SSCF_STATUS_PROTOCOL_ERROR,           "Protocol Error" },
  68         { SSCF_STATUS_PROVING_NOT_SUCCESSFUL,   "Proving Not Successful" },
  69         { 0,                                    NULL }
  70 };
  71
  72 static void
  73 dissect_sscf_nni(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  74 {
  75   guint reported_length;
  76   proto_item *sscf_item = NULL;
  77   proto_tree *sscf_tree = NULL;
  78   guint8 sscf_status;
  79
  80   reported_length = tvb_reported_length(tvb);   /* frame length */
  81
  82   if (tree) {
  83     sscf_item = proto_tree_add_item(tree, proto_sscf, tvb, 0, -1, ENC_NA);
  84     sscf_tree = proto_item_add_subtree(sscf_item, ett_sscf);
  85   }
  86
  87   if (reported_length > SSCF_PDU_LENGTH)
  88   {
  89     call_dissector(mtp3_handle, tvb, pinfo, tree);
  90
  91   } else {
  92
  93     sscf_status = tvb_get_guint8(tvb, SSCF_STATUS_OFFSET);
  94
  95     col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSCF-NNI");
  96     col_add_fstr(pinfo->cinfo, COL_INFO, "STATUS (%s) ",
  97                    val_to_str_const(sscf_status, sscf_status_vals, "Unknown"));
  98
  99
 100     proto_tree_add_item(sscf_tree, hf_status, tvb, SSCF_STATUS_OFFSET,
 101                         SSCF_STATUS_LENGTH, ENC_BIG_ENDIAN);
 102     proto_tree_add_item(sscf_tree, hf_spare, tvb, SSCF_SPARE_OFFSET,
 103                         SSCF_SPARE_LENGTH, ENC_BIG_ENDIAN);
 104   }
 105
 106 }
 107
 108 void
 109 proto_register_sscf(void)
 110 {
 111   static hf_register_info hf[] =
 112   { { &hf_status, { "Status", "sscf-nni.status", FT_UINT8, BASE_HEX,
 113                     VALS(sscf_status_vals), 0x0, NULL, HFILL} },
 114     { &hf_spare, { "Spare", "sscf-nni.spare", FT_UINT24, BASE_HEX,
 115                     NULL, 0x0, NULL, HFILL} }
 116   };
 117
 118   static gint *ett[] = {
 119     &ett_sscf,
 120   };
 121
 122   proto_sscf = proto_register_protocol("SSCF-NNI", "SSCF-NNI", "sscf-nni");
 123
 124   proto_register_field_array(proto_sscf, hf, array_length(hf));
 125   proto_register_subtree_array(ett, array_length(ett));
 126
 127   register_dissector("sscf-nni", dissect_sscf_nni, proto_sscf);
 128
 129 }
 130
 131 void
 132 proto_reg_handoff_sscf(void)
 133 {
 134   mtp3_handle = find_dissector("mtp3");
 135 }