epan/dissectors/packet-bt3ds.c

   1 /* packet-bt3ds.c
   2  * Routines for Bluetooth 3DS dissection
   3  *
   4  * Copyright 2013, Michal Labedzki for Tieto Corporation
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #include "config.h"
  26
  27 #include <epan/packet.h>
  28 #include <epan/prefs.h>
  29 #include <epan/expert.h>
  30
  31 #include "packet-btl2cap.h"
  32 #include "packet-btsdp.h"
  33
  34 static int proto_bt3ds = -1;
  35
  36 static int hf_message_opcode                                               = -1;
  37 static int hf_association_notification                                     = -1;
  38 static int hf_user_request_for_battery_level_display                       = -1;
  39 static int hf_reserved                                                     = -1;
  40 static int hf_battery_level                                                = -1;
  41
  42 static expert_field ei_message_opcode_reserved                        = EI_INIT;
  43 static expert_field ei_reserved                                       = EI_INIT;
  44 static expert_field ei_battery_level_reserved                         = EI_INIT;
  45 static expert_field ei_unexpected_data                                = EI_INIT;
  46
  47 static gint ett_bt3ds                                                      = -1;
  48
  49 static dissector_handle_t b3ds_handle;
  50
  51 static const value_string message_opcode_vals[] = {
  52     { 0x00,   "3DG Connection Announcement" },
  53     { 0, NULL }
  54 };
  55
  56 void proto_register_bt3ds(void);
  57 void proto_reg_handoff_bt3ds(void);
  58
  59 static gint
  60 dissect_bt3ds(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
  61 {
  62     proto_item     *main_item;
  63     proto_tree     *main_tree;
  64     proto_item     *sub_item;
  65     gint            offset = 0;
  66     guint8          value;
  67
  68     main_item = proto_tree_add_item(tree, proto_bt3ds, tvb, offset, -1, ENC_NA);
  69     main_tree = proto_item_add_subtree(main_item, ett_bt3ds);
  70
  71     col_set_str(pinfo->cinfo, COL_PROTOCOL, "3DS");
  72
  73     switch (pinfo->p2p_dir) {
  74         case P2P_DIR_SENT:
  75             col_set_str(pinfo->cinfo, COL_INFO, "Sent ");
  76             break;
  77         case P2P_DIR_RECV:
  78             col_set_str(pinfo->cinfo, COL_INFO, "Rcvd ");
  79             break;
  80         default:
  81             col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown direction %d ",
  82                 pinfo->p2p_dir);
  83             break;
  84     }
  85
  86     sub_item = proto_tree_add_item(main_tree, hf_message_opcode, tvb, offset, 1, ENC_BIG_ENDIAN);
  87     value = tvb_get_guint8(tvb, offset);
  88     if (value > 0)
  89         expert_add_info(pinfo, sub_item, &ei_message_opcode_reserved);
  90     offset += 1;
  91
  92     col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str_const(value, message_opcode_vals, "Unknown"));
  93
  94     sub_item = proto_tree_add_item(main_tree, hf_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
  95     proto_tree_add_item(main_tree, hf_user_request_for_battery_level_display, tvb, offset, 1, ENC_BIG_ENDIAN);
  96     proto_tree_add_item(main_tree, hf_association_notification, tvb, offset, 1, ENC_BIG_ENDIAN);
  97     value = tvb_get_guint8(tvb, offset) >> 2;
  98     if (value != 0)
  99         expert_add_info(pinfo, sub_item, &ei_reserved);
 100     offset += 1;
 101
 102     sub_item = proto_tree_add_item(main_tree, hf_battery_level, tvb, offset, 1, ENC_BIG_ENDIAN);
 103     value = tvb_get_guint8(tvb, offset);
 104     if (value >= 101 && value <= 254)
 105         expert_add_info(pinfo, sub_item, &ei_battery_level_reserved);
 106     else if (value == 255)
 107         proto_item_append_text(sub_item, "Battery Level Reporting Not Supported");
 108
 109     offset += 1;
 110
 111     if (tvb_length_remaining(tvb, offset) > 0) {
 112         proto_tree_add_expert(main_tree, pinfo, &ei_unexpected_data, tvb, offset, -1);
 113         offset += tvb_length_remaining(tvb, offset);
 114     }
 115
 116     return offset;
 117 }
 118
 119
 120 void
 121 proto_register_bt3ds(void)
 122 {
 123     module_t         *module;
 124     expert_module_t  *expert_bt3ds;
 125
 126     static ei_register_info ei[] = {
 127         { &ei_message_opcode_reserved,           { "bt3ds.expert.message_opcode.reserved", PI_PROTOCOL, PI_NOTE, "Value is reserved", EXPFILL }},
 128         { &ei_reserved,                          { "bt3ds.expert.reserved", PI_PROTOCOL, PI_NOTE, "Value is reserved", EXPFILL }},
 129         { &ei_battery_level_reserved,            { "bt3ds.expert.battery_level.reserved", PI_PROTOCOL, PI_NOTE, "Value is reserved", EXPFILL }},
 130         { &ei_unexpected_data,                   { "bt3ds.expert.unexpected_data", PI_PROTOCOL, PI_WARN, "Unexpected data", EXPFILL }}
 131     };
 132
 133     static hf_register_info hf[] = {
 134         { &hf_message_opcode,
 135             { "Message Opcode",                            "bt3ds.message_opcode",
 136             FT_UINT8, BASE_HEX, VALS(message_opcode_vals), 0x00,
 137             NULL, HFILL }
 138         },
 139         { &hf_association_notification,
 140             { "Association Notification",                  "bt3ds.association_notification",
 141             FT_BOOLEAN, 8, NULL, 0x01,
 142             NULL, HFILL }
 143         },
 144         { &hf_user_request_for_battery_level_display,
 145             { "User Request for Battery Level Display",    "bt3ds.user_request_for_battery_level_display",
 146             FT_BOOLEAN, 8, NULL, 0x02,
 147             NULL, HFILL }
 148         },
 149         { &hf_reserved,
 150             { "Reserved",                                  "bt3ds.reserved",
 151             FT_UINT8, BASE_HEX, NULL, 0xFC,
 152             NULL, HFILL }
 153         },
 154         { &hf_battery_level,
 155             { "Battery Level",                             "bt3ds.battery_level",
 156             FT_UINT8, BASE_DEC, NULL, 0x00,
 157             "0-100% of current charge level of battery", HFILL }
 158         }
 159     };
 160
 161     static gint *ett[] = {
 162         &ett_bt3ds
 163     };
 164
 165     proto_bt3ds = proto_register_protocol("Bluetooth 3DS Profile", "BT 3DS", "bt3ds");
 166     b3ds_handle = new_register_dissector("bt3ds", dissect_bt3ds, proto_bt3ds);
 167
 168     proto_register_field_array(proto_bt3ds, hf, array_length(hf));
 169     proto_register_subtree_array(ett, array_length(ett));
 170
 171     expert_bt3ds = expert_register_protocol(proto_bt3ds);
 172     expert_register_field_array(expert_bt3ds, ei, array_length(ei));
 173
 174     module = prefs_register_protocol(proto_bt3ds, NULL);
 175     prefs_register_static_text_preference(module, "3ds.version",
 176             "Bluetooth Profile 3DS version: 1.0",
 177             "Version of profile supported by this dissector.");
 178
 179 }
 180
 181 void
 182 proto_reg_handoff_bt3ds(void)
 183 {
 184     dissector_add_uint("btl2cap.service", BTSDP_3D_SYNCHRONIZATION_UUID, b3ds_handle);
 185     dissector_add_uint("btl2cap.service", BTSDP_3D_DISPLAY_UUID, b3ds_handle);
 186     dissector_add_uint("btl2cap.service", BTSDP_3D_GLASSES_UUID, b3ds_handle);
 187
 188     dissector_add_uint("btl2cap.psm", BTL2CAP_PSM_3DS, b3ds_handle);
 189     dissector_add_handle("btl2cap.cid", b3ds_handle);
 190 }
 191
 192 /*
 193  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 194  *
 195  * Local variables:
 196  * c-basic-offset: 4
 197  * tab-width: 8
 198  * indent-tabs-mode: nil
 199  * End:
 200  *
 201  * vi: set shiftwidth=4 tabstop=8 expandtab:
 202  * :indentSize=4:tabSize=8:noTabs=true:
 203  */