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
  35 #include "packet-bluetooth-hci.h"
  36
  37 static int proto_hci_h4 = -1;
  38 static int hf_hci_h4_type = -1;
  39 static int hf_hci_h4_direction = -1;
  40
  41 static gint ett_hci_h4 = -1;
  42
  43 static dissector_table_t hci_h4_table;
  44 static dissector_handle_t data_handle;
  45
  46 static wmem_tree_t *chandle_to_bdaddr_table = NULL;
  47 static wmem_tree_t *bdaddr_to_name_table    = NULL;
  48 static wmem_tree_t *localhost_name          = NULL;
  49 static wmem_tree_t *localhost_bdaddr        = NULL;
  50
  51 static const value_string hci_h4_type_vals[] = {
  52     {HCI_H4_TYPE_CMD, "HCI Command"},
  53     {HCI_H4_TYPE_ACL, "ACL Data"},
  54     {HCI_H4_TYPE_SCO, "SCO Data"},
  55     {HCI_H4_TYPE_EVT, "HCI Event"},
  56     {0, NULL }
  57 };
  58 static const value_string hci_h4_direction_vals[] = {
  59     {P2P_DIR_SENT,        "Sent"},
  60     {P2P_DIR_RECV,        "Rcvd"},
  61     {P2P_DIR_UNKNOWN,     "Unspecified"},
  62     {0, NULL}
  63 };
  64
  65 void proto_register_hci_h4(void);
  66 void proto_reg_handoff_hci_h4(void);
  67
  68 static gint
  69 dissect_hci_h4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
  70 {
  71     guint8      type;
  72     tvbuff_t    *next_tvb;
  73     proto_item  *ti = NULL;
  74     proto_tree  *hci_h4_tree = NULL;
  75     hci_data_t  *hci_data;
  76
  77     col_set_str(pinfo->cinfo, COL_PROTOCOL, "HCI H4");
  78     switch (pinfo->p2p_dir) {
  79
  80     case P2P_DIR_SENT:
  81         col_add_fstr(pinfo->cinfo, COL_INFO, "Sent ");
  82         break;
  83
  84     case P2P_DIR_RECV:
  85         col_add_fstr(pinfo->cinfo, COL_INFO, "Rcvd ");
  86         break;
  87
  88     case P2P_DIR_UNKNOWN:
  89         break;
  90
  91     default:
  92         col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown direction %d ",
  93                 pinfo->p2p_dir);
  94         break;
  95     }
  96
  97     type = tvb_get_guint8(tvb, 0);
  98
  99     if (tree) {
 100         ti = proto_tree_add_item(tree, proto_hci_h4, tvb, 0, 1, ENC_NA);
 101         hci_h4_tree = proto_item_add_subtree(ti, ett_hci_h4);
 102     }
 103
 104     hci_data = (hci_data_t *) wmem_new(wmem_packet_scope(), hci_data_t);
 105     hci_data->interface_id = HCI_INTERFACE_H4;
 106     hci_data->adapter_id = HCI_ADAPTER_DEFAULT;
 107     hci_data->chandle_to_bdaddr_table = chandle_to_bdaddr_table;
 108     hci_data->bdaddr_to_name_table = bdaddr_to_name_table;
 109     hci_data->localhost_bdaddr = localhost_bdaddr;
 110     hci_data->localhost_name = localhost_name;
 111
 112     pinfo->ptype = PT_BLUETOOTH;
 113
 114     ti = proto_tree_add_uint(hci_h4_tree, hf_hci_h4_direction, tvb, 0, 0, pinfo->p2p_dir);
 115     PROTO_ITEM_SET_GENERATED(ti);
 116
 117     proto_tree_add_item(hci_h4_tree, hf_hci_h4_type,
 118         tvb, 0, 1, ENC_LITTLE_ENDIAN);
 119     col_append_fstr(pinfo->cinfo, COL_INFO, "%s",
 120             val_to_str(type, hci_h4_type_vals, "Unknown HCI packet type 0x%02x"));
 121
 122     next_tvb = tvb_new_subset_remaining(tvb, 1);
 123     if (!dissector_try_uint_new(hci_h4_table, type, next_tvb, pinfo, tree, TRUE, hci_data)) {
 124         call_dissector(data_handle, next_tvb, pinfo, tree);
 125     }
 126
 127     return tvb_length(tvb);
 128 }
 129
 130
 131 void
 132 proto_register_hci_h4(void)
 133 {
 134     static hf_register_info hf[] = {
 135         { &hf_hci_h4_type,
 136             { "HCI Packet Type",           "hci_h4.type",
 137             FT_UINT8, BASE_HEX, VALS(hci_h4_type_vals), 0x0,
 138             NULL, HFILL }
 139         },
 140         { &hf_hci_h4_direction,
 141             { "Direction",                 "hci_h4.direction",
 142             FT_UINT8, BASE_HEX, VALS(hci_h4_direction_vals), 0x0,
 143             "HCI Packet Direction Sent/Rcvd", HFILL }
 144         }
 145     };
 146
 147     static gint *ett[] = {
 148         &ett_hci_h4,
 149     };
 150
 151     proto_hci_h4 = proto_register_protocol("Bluetooth HCI H4",
 152             "HCI_H4", "hci_h4");
 153
 154     new_register_dissector("hci_h4", dissect_hci_h4, proto_hci_h4);
 155
 156     proto_register_field_array(proto_hci_h4, hf, array_length(hf));
 157     proto_register_subtree_array(ett, array_length(ett));
 158
 159     hci_h4_table = register_dissector_table("hci_h4.type",
 160             "HCI H4 pdu type", FT_UINT8, BASE_HEX);
 161
 162     chandle_to_bdaddr_table = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adapter, chandle: bdaddr */
 163     bdaddr_to_name_table = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* bdaddr: name */
 164     localhost_bdaddr = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adapter, frame: bdaddr */
 165     localhost_name = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adapter, frame: name */
 166 }
 167
 168 void
 169 proto_reg_handoff_hci_h4(void)
 170 {
 171     dissector_handle_t hci_h4_handle;
 172
 173     data_handle = find_dissector("data");
 174     hci_h4_handle = find_dissector("hci_h4");
 175     dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4, hci_h4_handle);
 176     dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR, hci_h4_handle);
 177 }
 178
 179 /*
 180  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 181  *
 182  * Local variables:
 183  * c-basic-offset: 4
 184  * tab-width: 8
 185  * indent-tabs-mode: nil
 186  * End:
 187  *
 188  * vi: set shiftwidth=4 tabstop=8 expandtab:
 189  * :indentSize=4:tabSize=8:noTabs=true:
 190  */