wireshark/epan/dissectors/packet-hci_h4.c

/* packet-hci_h4.c
 * Routines for the Bluetooth HCI H4 dissection
 *
 * Copyright 2002, Christoph Scholz <scholz@cs.uni-bonn.de>
 *  From: http://affix.sourceforge.net/archive/ethereal_affix-3.patch
 *
 * Refactored for wireshark checkin
 *   Ronnie Sahlberg 2006
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <epan/packet.h>
#include <wiretap/wtap.h>
#include <epan/wmem/wmem.h>
#include <wiretap/wtap.h>

#include "packet-bluetooth-hci.h"

static int proto_hci_h4 = -1;
static int hf_hci_h4_type = -1;
static int hf_hci_h4_direction = -1;

static gint ett_hci_h4 = -1;

static dissector_handle_t hci_h4_handle;

static dissector_table_t hci_h4_table;
static dissector_handle_t data_handle;

static wmem_tree_t *chandle_sessions        = NULL;
static wmem_tree_t *chandle_to_bdaddr_table = NULL;
static wmem_tree_t *bdaddr_to_name_table    = NULL;
static wmem_tree_t *localhost_name          = NULL;
static wmem_tree_t *localhost_bdaddr        = NULL;

static const value_string hci_h4_type_vals[] = {
    {HCI_H4_TYPE_CMD, "HCI Command"},
    {HCI_H4_TYPE_ACL, "ACL Data"},
    {HCI_H4_TYPE_SCO, "SCO Data"},
    {HCI_H4_TYPE_EVT, "HCI Event"},
    {0, NULL }
};
static const value_string hci_h4_direction_vals[] = {
    {P2P_DIR_SENT,        "Sent"},
    {P2P_DIR_RECV,        "Rcvd"},
    {P2P_DIR_UNKNOWN,     "Unspecified"},
    {0, NULL}
};

static guint32 max_disconnect_in_frame = G_MAXUINT32;


void proto_register_hci_h4(void);
void proto_reg_handoff_hci_h4(void);

static gint
dissect_hci_h4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
    guint8      type;
    tvbuff_t    *next_tvb;
    proto_item  *ti = NULL;
    proto_tree  *hci_h4_tree = NULL;
    hci_data_t  *hci_data;

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "HCI H4");
    switch (pinfo->p2p_dir) {

    case P2P_DIR_SENT:
        col_add_fstr(pinfo->cinfo, COL_INFO, "Sent ");
        break;

    case P2P_DIR_RECV:
        col_add_fstr(pinfo->cinfo, COL_INFO, "Rcvd ");
        break;

    case P2P_DIR_UNKNOWN:
        break;

    default:
        col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown direction %d ",
                pinfo->p2p_dir);
        break;
    }

    type = tvb_get_guint8(tvb, 0);

    if (tree) {
        ti = proto_tree_add_item(tree, proto_hci_h4, tvb, 0, 1, ENC_NA);
        hci_h4_tree = proto_item_add_subtree(ti, ett_hci_h4);
    }

    hci_data = (hci_data_t *) wmem_new(wmem_packet_scope(), hci_data_t);
    if (pinfo->phdr->presence_flags & WTAP_HAS_INTERFACE_ID)
        hci_data->interface_id = pinfo->phdr->interface_id;
    else
        hci_data->interface_id = HCI_INTERFACE_DEFAULT;
    hci_data->adapter_id = HCI_ADAPTER_DEFAULT;
    hci_data->adapter_disconnect_in_frame = &max_disconnect_in_frame;
    hci_data->chandle_sessions = chandle_sessions;
    hci_data->chandle_to_bdaddr_table = chandle_to_bdaddr_table;
    hci_data->bdaddr_to_name_table = bdaddr_to_name_table;
    hci_data->localhost_bdaddr = localhost_bdaddr;
    hci_data->localhost_name = localhost_name;

    pinfo->ptype = PT_BLUETOOTH;

    ti = proto_tree_add_uint(hci_h4_tree, hf_hci_h4_direction, tvb, 0, 0, pinfo->p2p_dir);
    PROTO_ITEM_SET_GENERATED(ti);

    proto_tree_add_item(hci_h4_tree, hf_hci_h4_type,
        tvb, 0, 1, ENC_LITTLE_ENDIAN);
    col_append_fstr(pinfo->cinfo, COL_INFO, "%s",
            val_to_str(type, hci_h4_type_vals, "Unknown HCI packet type 0x%02x"));

    next_tvb = tvb_new_subset_remaining(tvb, 1);
    if (!dissector_try_uint_new(hci_h4_table, type, next_tvb, pinfo, tree, TRUE, hci_data)) {
        call_dissector(data_handle, next_tvb, pinfo, tree);
    }

    return tvb_length(tvb);
}


void
proto_register_hci_h4(void)
{
    static hf_register_info hf[] = {
        { &hf_hci_h4_type,
            { "HCI Packet Type",           "hci_h4.type",
            FT_UINT8, BASE_HEX, VALS(hci_h4_type_vals), 0x0,
            NULL, HFILL }
        },
        { &hf_hci_h4_direction,
            { "Direction",                 "hci_h4.direction",
            FT_UINT8, BASE_HEX, VALS(hci_h4_direction_vals), 0x0,
            "HCI Packet Direction Sent/Rcvd", HFILL }
        }
    };

    static gint *ett[] = {
        &ett_hci_h4,
    };

    proto_hci_h4 = proto_register_protocol("Bluetooth HCI H4",
            "HCI_H4", "hci_h4");

    hci_h4_handle = new_register_dissector("hci_h4", dissect_hci_h4, proto_hci_h4);

    proto_register_field_array(proto_hci_h4, hf, array_length(hf));
    proto_register_subtree_array(ett, array_length(ett));

    hci_h4_table = register_dissector_table("hci_h4.type",
            "HCI H4 pdu type", FT_UINT8, BASE_HEX);

    chandle_sessions = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
    chandle_to_bdaddr_table = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adapter, chandle: bdaddr */
    bdaddr_to_name_table = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* bdaddr: name */
    localhost_bdaddr = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adapter, frame: bdaddr */
    localhost_name = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); /* adapter, frame: name */
}

void
proto_reg_handoff_hci_h4(void)
{
    data_handle = find_dissector("data");

    dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4, hci_h4_handle);
    dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR, hci_h4_handle);
}

/*
 * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * vi: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */