epan/dissectors/packet-hci_h4.c

   1 /* packet-hci_h4.c
   2  * Routines for the Bluetooth HCI H4 dissection
   3  *
   4  * Copyright 2002, Christoph Scholz <scholz@cs.uni-bonn.de>
   5  *  From: http://affix.sourceforge.net/archive/ethereal_affix-3.patch
   6  *
   7  * Refactored for wireshark checkin
   8  *   Ronnie Sahlberg 2006
   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 USA.
  27  */
  28
  29 #include "config.h"
  30
  31 #include <epan/packet.h>
  32 #include <wiretap/wtap.h>
  33 #include <epan/wmem/wmem.h>
  34 #include <wiretap/wtap.h>
  35
  36 #include "packet-bluetooth-hci.h"
  37
  38 static int proto_hci_h4 = -1;
  39 static int hf_hci_h4_type = -1;
  40 static int hf_hci_h4_direction = -1;
  41
  42 static gint ett_hci_h4 = -1;
  43
  44 static dissector_handle_t hci_h4_handle;
  45
  46 static dissector_table_t hci_h4_table;
  47 static dissector_handle_t data_handle;
  48
  49 static wmem_tree_t *chandle_to_bdaddr_table = NULL;
  50 static wmem_tree_t *bdaddr_to_name_table    = NULL;
  51 static wmem_tree_t *localhost_name          = NULL;
  52 static wmem_tree_t *localhost_bdaddr        = NULL;
  53
  54 static const value_string hci_h4_type_vals[] = {
  55     {HCI_H4_TYPE_CMD, "HCI Command"},
  56     {HCI_H4_TYPE_ACL, "ACL Data"},
  57     {HCI_H4_TYPE_SCO, "SCO Data"},
  58     {HCI_H4_TYPE_EVT, "HCI Event"},
  59     {0, NULL }
  60 };
  61 static const value_string hci_h4_direction_vals[] = {
  62     {P2P_DIR_SENT,        "Sent"},
  63     {P2P_DIR_RECV,        "Rcvd"},
  64     {P2P_DIR_UNKNOWN,     "Unspecified"},
  65     {0, NULL}
  66 };
  67
  68 void proto_register_hci_h4(void);
  69 void proto_reg_handoff_hci_h4(void);
  70
  71 static gint
  72 dissect_hci_h4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
  73 {
  74     guint8      type;
  75     tvbuff_t    *next_tvb;
  76     proto_item  *ti = NULL;
  77     proto_tree  *hci_h4_tree = NULL;
  78     hci_data_t  *hci_data;
  79
  80     col_set_str(pinfo->cinfo, COL_PROTOCOL, "HCI H4");
  81     switch (pinfo->p2p_dir) {
  82
  83     case P2P_DIR_SENT:
  84         col_add_fstr(pinfo->cinfo, COL_INFO, "Sent ");
  85         break;
  86
  87     case P2P_DIR_RECV:
  88         col_add_fstr(pinfo->cinfo, COL_INFO, "Rcvd ");
  89         break;
  90
  91     case P2P_DIR_UNKNOWN:
  92         break;
  93
  94     default:
  95         col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown direction %d ",
  96                 pinfo->p2p_dir);
  97         break;
  98     }
  99
 100     type = tvb_get_guint8(tvb, 0);
 101
 102     if (tree) {
 103         ti = proto_tree_add_item(tree, proto_hci_h4, tvb, 0, 1, ENC_NA);
 104         hci_h4_tree = proto_item_add_subtree(ti, ett_hci_h4);
 105     }
 106
 107     hci_data = (hci_data_t *) wmem_new(wmem_packet_scope(), hci_data_t);
 108     if (pinfo->phdr->presence_flags & WTAP_HAS_INTERFACE_ID)
 109         hci_data->interface_id = pinfo->phdr->interface_id;
 110     else
 111         hci_data->interface_id = HCI_INTERFACE_DEFAULT;
 112     hci_data->adapter_id = HCI_ADAPTER_DEFAULT;
 113     hci_data->chandle_to_bdaddr_table = chandle_to_bdaddr_table;
 114     hci_data->bdaddr_to_name_table = bdaddr_to_name_table;
 115     hci_data->localhost_bdaddr = localhost_bdaddr;
 116     hci_data->localhost_name = localhost_name;
 117
 118     pinfo->ptype = PT_BLUETOOTH;
 119
 120     ti = proto_tree_add_uint(hci_h4_tree, hf_hci_h4_direction, tvb, 0, 0, pinfo->p2p_dir);
 121     PROTO_ITEM_SET_GENERATED(ti);
 122
 123     proto_tree_add_item(hci_h4_tree, hf_hci_h4_type,
 124         tvb, 0, 1, ENC_LITTLE_ENDIAN);
 125     col_append_fstr(pinfo->cinfo, COL_INFO, "%s",
 126             val_to_str(type, hci_h4_type_vals, "Unknown HCI packet type 0x%02x"));
 127
 128     next_tvb = tvb_new_subset_remaining(tvb, 1);
 129     if (!dissector_try_uint_new(hci_h4_table, type, next_tvb, pinfo, tree, TRUE, hci_data)) {
 130         call_dissector(data_handle, next_tvb, pinfo, tree);
 131     }
 132
 133     return tvb_length(tvb);
 134 }
 135
 136
 137 void
 138 proto_register_hci_h4(void)
 139 {
 140     static hf_register_info hf[] = {
 141         { &hf_hci_h4_type,
 142             { "HCI Packet Type",           "hci_h4.type",
 143             FT_UINT8, BASE_HEX, VALS(hci_h4_type_vals), 0x0,
 144             NULL, HFILL }
 145         },
 146         { &hf_hci_h4_direction,
 147             { "Direction",                 "hci_h4.direction",
 148             FT_UINT8, BASE_HEX, VALS(hci_h4_direction_vals), 0x0,
 149             "HCI Packet Direction Sent/Rcvd", HFILL }
 150         }
 151     };
 152
 153     static gint *ett[] = {
 154         &ett_hci_h4,
 155     };
 156
 157     proto_hci_h4 = proto_register_protocol("Bluetooth HCI H4",
 158             "HCI_H4", "hci_h4");
 159
 160     hci_h4_handle = new_register_dissector("hci_h4", dissect_hci_h4, proto_hci_h4);
 161
 162     proto_register_field_array(proto_hci_h4, hf, array_length(hf));
 163     proto_register_subtree_array(ett, array_length(ett));
 164
 165     hci_h4_table = register_dissector_table("hci_h4.type",
 166             "HCI H4 pdu type", FT_UINT8, BASE_HEX);
 167
 168     chandle_to_bdaddr_table = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adapter, chandle: bdaddr */
 169     bdaddr_to_name_table = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* bdaddr: name */
 170     localhost_bdaddr = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adapter, frame: bdaddr */
 171     localhost_name = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adapter, frame: name */
 172 }
 173
 174 void
 175 proto_reg_handoff_hci_h4(void)
 176 {
 177     data_handle = find_dissector("data");
 178
 179     dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4, hci_h4_handle);
 180     dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR, hci_h4_handle);
 181 }
 182
 183 /*
 184  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 185  *
 186  * Local variables:
 187  * c-basic-offset: 4
 188  * tab-width: 8
 189  * indent-tabs-mode: nil
 190  * End:
 191  *
 192  * vi: set shiftwidth=4 tabstop=8 expandtab:
 193  * :indentSize=4:tabSize=8:noTabs=true:
 194  */