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  * $Id$
  11  *
  12  * Wireshark - Network traffic analyzer
  13  * By Gerald Combs <gerald@wireshark.org>
  14  * Copyright 1998 Gerald Combs
  15  *
  16  * This program is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU General Public License
  18  * as published by the Free Software Foundation; either version 2
  19  * of the License, or (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  29  */
  30
  31 #include "config.h"
  32
  33 #include <epan/packet.h>
  34 #include <epan/wmem/wmem.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_table_t hci_h4_table;
  45 static dissector_handle_t data_handle;
  46
  47 static wmem_tree_t *chandle_to_bdaddr_table = NULL;
  48 static wmem_tree_t *bdaddr_to_name_table    = NULL;
  49 static wmem_tree_t *localhost_name          = NULL;
  50 static wmem_tree_t *localhost_bdaddr        = NULL;
  51
  52 static const value_string hci_h4_type_vals[] = {
  53     {HCI_H4_TYPE_CMD, "HCI Command"},
  54     {HCI_H4_TYPE_ACL, "ACL Data"},
  55     {HCI_H4_TYPE_SCO, "SCO Data"},
  56     {HCI_H4_TYPE_EVT, "HCI Event"},
  57     {0, NULL }
  58 };
  59 static const value_string hci_h4_direction_vals[] = {
  60     {P2P_DIR_SENT,        "Sent"},
  61     {P2P_DIR_RECV,        "Rcvd"},
  62     {P2P_DIR_UNKNOWN,     "Unspecified"},
  63     {0, NULL}
  64 };
  65
  66 void proto_register_hci_h4(void);
  67 void proto_reg_handoff_hci_h4(void);
  68
  69 static gint
  70 dissect_hci_h4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
  71 {
  72     guint8      type;
  73     tvbuff_t    *next_tvb;
  74     proto_item  *ti = NULL;
  75     proto_tree  *hci_h4_tree = NULL;
  76     hci_data_t  *hci_data;
  77
  78     col_set_str(pinfo->cinfo, COL_PROTOCOL, "HCI H4");
  79     switch (pinfo->p2p_dir) {
  80
  81     case P2P_DIR_SENT:
  82         col_add_fstr(pinfo->cinfo, COL_INFO, "Sent ");
  83         break;
  84
  85     case P2P_DIR_RECV:
  86         col_add_fstr(pinfo->cinfo, COL_INFO, "Rcvd ");
  87         break;
  88
  89     case P2P_DIR_UNKNOWN:
  90         break;
  91
  92     default:
  93         col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown direction %d ",
  94                 pinfo->p2p_dir);
  95         break;
  96     }
  97
  98     type = tvb_get_guint8(tvb, 0);
  99
 100     if (tree) {
 101         ti = proto_tree_add_item(tree, proto_hci_h4, tvb, 0, 1, ENC_NA);
 102         hci_h4_tree = proto_item_add_subtree(ti, ett_hci_h4);
 103     }
 104
 105     hci_data = (hci_data_t *) wmem_new(wmem_packet_scope(), hci_data_t);
 106     hci_data->interface_id = HCI_INTERFACE_H4;
 107     hci_data->adapter_id = HCI_ADAPTER_DEFAULT;
 108     hci_data->chandle_to_bdaddr_table = chandle_to_bdaddr_table;
 109     hci_data->bdaddr_to_name_table = bdaddr_to_name_table;
 110     hci_data->localhost_bdaddr = localhost_bdaddr;
 111     hci_data->localhost_name = localhost_name;
 112
 113     pinfo->ptype = PT_BLUETOOTH;
 114
 115     ti = proto_tree_add_uint(hci_h4_tree, hf_hci_h4_direction, tvb, 0, 0, pinfo->p2p_dir);
 116     PROTO_ITEM_SET_GENERATED(ti);
 117
 118     proto_tree_add_item(hci_h4_tree, hf_hci_h4_type,
 119         tvb, 0, 1, ENC_LITTLE_ENDIAN);
 120     col_append_fstr(pinfo->cinfo, COL_INFO, "%s",
 121             val_to_str(type, hci_h4_type_vals, "Unknown HCI packet type 0x%02x"));
 122
 123     next_tvb = tvb_new_subset_remaining(tvb, 1);
 124     if (!dissector_try_uint_new(hci_h4_table, type, next_tvb, pinfo, tree, TRUE, hci_data)) {
 125         call_dissector(data_handle, next_tvb, pinfo, tree);
 126     }
 127
 128     return tvb_length(tvb);
 129 }
 130
 131
 132 void
 133 proto_register_hci_h4(void)
 134 {
 135     static hf_register_info hf[] = {
 136         { &hf_hci_h4_type,
 137             { "HCI Packet Type",           "hci_h4.type",
 138             FT_UINT8, BASE_HEX, VALS(hci_h4_type_vals), 0x0,
 139             NULL, HFILL }
 140         },
 141         { &hf_hci_h4_direction,
 142             { "Direction",                 "hci_h4.direction",
 143             FT_UINT8, BASE_HEX, VALS(hci_h4_direction_vals), 0x0,
 144             "HCI Packet Direction Sent/Rcvd", HFILL }
 145         }
 146     };
 147
 148     static gint *ett[] = {
 149         &ett_hci_h4,
 150     };
 151
 152     proto_hci_h4 = proto_register_protocol("Bluetooth HCI H4",
 153             "HCI_H4", "hci_h4");
 154
 155     new_register_dissector("hci_h4", dissect_hci_h4, proto_hci_h4);
 156
 157     proto_register_field_array(proto_hci_h4, hf, array_length(hf));
 158     proto_register_subtree_array(ett, array_length(ett));
 159
 160     hci_h4_table = register_dissector_table("hci_h4.type",
 161             "HCI H4 pdu type", FT_UINT8, BASE_HEX);
 162
 163     chandle_to_bdaddr_table = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adapter, chandle: bdaddr */
 164     bdaddr_to_name_table = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* bdaddr: name */
 165     localhost_bdaddr = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adaper, frame: bdaddr */
 166     localhost_name = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adaper, frame: name */
 167 }
 168
 169 void
 170 proto_reg_handoff_hci_h4(void)
 171 {
 172     dissector_handle_t hci_h4_handle;
 173
 174     data_handle = find_dissector("data");
 175     hci_h4_handle = find_dissector("hci_h4");
 176     dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4, hci_h4_handle);
 177     dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR, hci_h4_handle);
 178 }
 179
 180 /*
 181  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 182  *
 183  * Local variables:
 184  * c-basic-offset: 4
 185  * tab-width: 8
 186  * indent-tabs-mode: nil
 187  * End:
 188  *
 189  * vi: set shiftwidth=4 tabstop=8 expandtab:
 190  * :indentSize=4:tabSize=8:noTabs=true:
 191  */