forked from osmocom/wireshark
![Stig Bjørlykke](/assets/img/avatar_default.png)
Change from col_append_fstr() to col_append_str() when appending strings without formatting. Change-Id: I8975704c246f2b9a1301ed5f96273aa9d61c6f44 Reviewed-on: https://code.wireshark.org/review/20857 Petri-Dish: Stig Bjørlykke <stig@bjorlykke.org> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Anders Broman <a.broman58@gmail.com>
1165 lines
42 KiB
C
1165 lines
42 KiB
C
/* packet-bthsp.c
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* Routines for Bluetooth Headset Profile (HSP)
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*
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* Copyright 2013, Michal Labedzki for Tieto Corporation
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/expert.h>
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#include "packet-btrfcomm.h"
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#include "packet-btsdp.h"
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static int proto_bthsp = -1;
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static int hf_command = -1;
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static int hf_parameters = -1;
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static int hf_command_in = -1;
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static int hf_unsolicited = -1;
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static int hf_role = -1;
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static int hf_at_cmd = -1;
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static int hf_at_cmd_type = -1;
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static int hf_at_command_line_prefix = -1;
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static int hf_at_ignored = -1;
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static int hf_parameter = -1;
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static int hf_unknown_parameter = -1;
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static int hf_data = -1;
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static int hf_fragment = -1;
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static int hf_fragmented = -1;
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static int hf_vgs = -1;
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static int hf_vgm = -1;
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static int hf_ckpd = -1;
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static expert_field ei_non_mandatory_command = EI_INIT;
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static expert_field ei_invalid_usage = EI_INIT;
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static expert_field ei_unknown_parameter = EI_INIT;
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static expert_field ei_vgm_gain = EI_INIT;
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static expert_field ei_vgs_gain = EI_INIT;
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static expert_field ei_ckpd = EI_INIT;
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static gint ett_bthsp = -1;
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static gint ett_bthsp_command = -1;
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static gint ett_bthsp_parameters = -1;
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static dissector_handle_t bthsp_handle;
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static wmem_tree_t *fragments = NULL;
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#define ROLE_UNKNOWN 0
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#define ROLE_AG 1
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#define ROLE_HS 2
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#define TYPE_UNKNOWN 0x0000
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#define TYPE_RESPONSE_ACK 0x0d0a
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#define TYPE_RESPONSE 0x003a
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#define TYPE_ACTION 0x003d
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#define TYPE_ACTION_SIMPLY 0x000d
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#define TYPE_READ 0x003f
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#define TYPE_TEST 0x3d3f
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static gint hsp_role = ROLE_UNKNOWN;
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enum reassemble_state_t {
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REASSEMBLE_FRAGMENT,
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REASSEMBLE_PARTIALLY,
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REASSEMBLE_DONE
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};
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typedef struct _fragment_t {
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guint32 interface_id;
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guint32 adapter_id;
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guint32 chandle;
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guint32 dlci;
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guint32 role;
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guint idx;
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guint length;
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guint8 *data;
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struct _fragment_t *previous_fragment;
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guint reassemble_start_offset;
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guint reassemble_end_offset;
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enum reassemble_state_t reassemble_state;
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} fragment_t;
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typedef struct _at_cmd_t {
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const guint8 *name;
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const guint8 *long_name;
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gboolean (*check_command)(gint role, guint16 type);
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gboolean (*dissect_parameter)(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree, gint offset, gint role, guint16 type,
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guint8 *parameter_stream, guint parameter_number,
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gint parameter_length, void **data);
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} at_cmd_t;
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static const value_string role_vals[] = {
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{ ROLE_UNKNOWN, "Unknown" },
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{ ROLE_AG, "AG - Audio Gate" },
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{ ROLE_HS, "HS - Headset" },
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{ 0, NULL }
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};
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static const value_string at_cmd_type_vals[] = {
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{ 0x0d, "Action Command" },
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{ 0x3a, "Response" },
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{ 0x3d, "Action Command" },
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{ 0x3f, "Read Command" },
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{ 0x0d0a, "Response" },
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{ 0x3d3f, "Test Command" },
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{ 0, NULL }
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};
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static const enum_val_t pref_hsp_role[] = {
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{ "off", "Off", ROLE_UNKNOWN },
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{ "ag", "Sent is AG, Rcvd is HS", ROLE_AG },
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{ "hs", "Sent is HS, Rcvd is AG", ROLE_HS },
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{ NULL, NULL, 0 }
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};
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static const unit_name_string units_slash15 = { "/15", NULL };
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void proto_register_bthsp(void);
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void proto_reg_handoff_bthsp(void);
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static guint32 get_uint_parameter(guint8 *parameter_stream, gint parameter_length)
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{
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guint32 value;
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guint8 *val;
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val = (guint8 *) wmem_alloc(wmem_packet_scope(), parameter_length + 1);
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memcpy(val, parameter_stream, parameter_length);
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val[parameter_length] = '\0';
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value = (guint32) g_ascii_strtoull(val, NULL, 10);
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return value;
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}
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static gboolean check_vgs(gint role, guint16 type) {
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if (role == ROLE_HS && type == TYPE_ACTION) return TRUE;
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if (role == ROLE_AG && type == TYPE_RESPONSE) return TRUE;
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return FALSE;
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}
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static gboolean check_vgm(gint role, guint16 type) {
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if (role == ROLE_HS && type == TYPE_ACTION) return TRUE;
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if (role == ROLE_AG && type == TYPE_RESPONSE) return TRUE;
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return FALSE;
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}
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static gboolean check_ckpd(gint role, guint16 type) {
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if (role == ROLE_HS && type == TYPE_ACTION) return TRUE;
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return FALSE;
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}
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static gboolean check_only_ag_role(gint role, guint16 type) {
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if (role == ROLE_AG && type == TYPE_RESPONSE_ACK) return TRUE;
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return FALSE;
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}
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static gint
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dissect_vgs_parameter(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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gint offset, gint role, guint16 type, guint8 *parameter_stream,
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guint parameter_number, gint parameter_length, void **data _U_)
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{
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proto_item *pitem;
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guint32 value;
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if (!check_vgs(role, type)) return FALSE;
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if (parameter_number > 0) return FALSE;
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value = get_uint_parameter(parameter_stream, parameter_length);
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pitem = proto_tree_add_uint(tree, hf_vgs, tvb, offset, parameter_length, value);
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if (value > 15) {
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expert_add_info(pinfo, pitem, &ei_vgs_gain);
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}
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return TRUE;
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}
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static gint
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dissect_vgm_parameter(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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gint offset, gint role, guint16 type, guint8 *parameter_stream,
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guint parameter_number, gint parameter_length, void **data _U_)
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{
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proto_item *pitem;
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guint32 value;
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if (!check_vgm(role, type)) return FALSE;
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if (parameter_number > 0) return FALSE;
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value = get_uint_parameter(parameter_stream, parameter_length);
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pitem = proto_tree_add_uint(tree, hf_vgm, tvb, offset, parameter_length, value);
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if (value > 15) {
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expert_add_info(pinfo, pitem, &ei_vgm_gain);
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}
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return TRUE;
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}
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static gint
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dissect_ckpd_parameter(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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gint offset, gint role, guint16 type, guint8 *parameter_stream,
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guint parameter_number, gint parameter_length, void **data _U_)
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{
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proto_item *pitem;
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guint32 value;
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if (!check_ckpd(role, type)) return FALSE;
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if (parameter_number > 0) return FALSE;
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value = get_uint_parameter(parameter_stream, parameter_length);
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pitem = proto_tree_add_uint(tree, hf_ckpd, tvb, offset, parameter_length, value);
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if (value != 200) {
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expert_add_info(pinfo, pitem, &ei_ckpd);
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}
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return TRUE;
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}
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static gint
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dissect_no_parameter(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_,
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gint offset _U_, gint role _U_, guint16 type _U_, guint8 *parameter_stream _U_,
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guint parameter_number _U_, gint parameter_length _U_, void **data _U_)
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{
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return FALSE;
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}
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static const at_cmd_t at_cmds[] = {
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{ "+VGS", "Gain of Speaker", check_vgs, dissect_vgs_parameter },
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{ "+VGM", "Gain of Microphone", check_vgm, dissect_vgm_parameter },
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{ "+CKPD", "Control Keypad", check_ckpd, dissect_ckpd_parameter },
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{ "ERROR", "ERROR", check_only_ag_role, dissect_no_parameter },
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{ "RING", "Incoming Call Indication", check_only_ag_role, dissect_no_parameter },
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{ "OK", "OK", check_only_ag_role, dissect_no_parameter },
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{ NULL, NULL, NULL, NULL }
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};
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static gint
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dissect_at_command(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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gint offset, guint32 role, gint command_number)
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{
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proto_item *pitem;
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proto_tree *command_item;
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proto_item *command_tree;
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proto_tree *parameters_item = NULL;
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proto_item *parameters_tree = NULL;
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guint8 *col_str = NULL;
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guint8 *at_stream;
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guint8 *at_command = NULL;
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gint i_char = 0;
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guint i_char_fix = 0;
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gint length;
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const at_cmd_t *i_at_cmd;
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gint parameter_length;
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guint parameter_number = 0;
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gint first_parameter_offset = offset;
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gint last_parameter_offset = offset;
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guint16 type = TYPE_UNKNOWN;
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guint32 brackets;
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gboolean quotation;
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gboolean next;
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void *data;
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length = tvb_reported_length_remaining(tvb, offset);
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if (length <= 0)
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return tvb_reported_length(tvb);
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if (!command_number) {
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proto_tree_add_item(tree, hf_data, tvb, offset, length, ENC_NA | ENC_ASCII);
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col_str = (guint8 *) wmem_alloc(wmem_packet_scope(), length + 1);
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tvb_memcpy(tvb, col_str, offset, length);
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col_str[length] = '\0';
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}
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at_stream = (guint8 *) wmem_alloc(wmem_packet_scope(), length + 1);
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tvb_memcpy(tvb, at_stream, offset, length);
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at_stream[length] = '\0';
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while (at_stream[i_char]) {
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at_stream[i_char] = g_ascii_toupper(at_stream[i_char]);
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if (!command_number) {
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col_str[i_char] = g_ascii_toupper(col_str[i_char]);
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if (!g_ascii_isgraph(col_str[i_char])) col_str[i_char] = ' ';
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}
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i_char += 1;
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}
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command_item = proto_tree_add_none_format(tree, hf_command, tvb,
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offset, 0, "Command %u", command_number);
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command_tree = proto_item_add_subtree(command_item, ett_bthsp_command);
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if (!command_number) col_append_str(pinfo->cinfo, COL_INFO, col_str);
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if (role == ROLE_HS) {
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if (command_number) {
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at_command = at_stream;
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i_char = 0;
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} else {
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at_command = g_strstr_len(at_stream, length, "AT");
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if (at_command) {
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i_char = (guint) (at_command - at_stream);
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if (i_char) {
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proto_tree_add_item(command_tree, hf_at_ignored, tvb, offset,
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i_char, ENC_NA | ENC_ASCII);
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offset += i_char;
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}
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proto_tree_add_item(command_tree, hf_at_command_line_prefix,
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tvb, offset, 2, ENC_NA | ENC_ASCII);
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offset += 2;
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i_char += 2;
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at_command = at_stream;
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at_command += i_char;
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length -= i_char;
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i_char_fix += i_char;
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i_char = 0;
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}
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}
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} else {
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at_command = at_stream;
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i_char = 0;
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while (i_char <= length &&
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(at_command[i_char] == '\r' || at_command[i_char] == '\n' ||
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at_command[i_char] == ' ' || at_command[i_char] == '\t')) {
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/* ignore white characters */
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i_char += 1;
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}
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offset += i_char;
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at_command += i_char;
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length -= i_char;
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i_char_fix += i_char;
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i_char = 0;
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}
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if (at_command) {
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while (i_char < length &&
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(at_command[i_char] != '\r' && at_command[i_char] != '=' &&
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at_command[i_char] != ';' && at_command[i_char] != '?' &&
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at_command[i_char] != ':')) {
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i_char += 1;
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}
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i_at_cmd = at_cmds;
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if (at_command[0] == '\r') {
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pitem = proto_tree_add_item(command_tree, hf_at_cmd, tvb, offset - 2,
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2, ENC_NA | ENC_ASCII);
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i_at_cmd = NULL;
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} else {
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pitem = NULL;
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while (i_at_cmd->name) {
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if (g_str_has_prefix(&at_command[0], i_at_cmd->name)) {
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pitem = proto_tree_add_item(command_tree, hf_at_cmd, tvb, offset,
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(gint) strlen(i_at_cmd->name), ENC_NA | ENC_ASCII);
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proto_item_append_text(pitem, " (%s)", i_at_cmd->long_name);
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break;
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}
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i_at_cmd += 1;
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}
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if (!pitem) {
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pitem = proto_tree_add_item(command_tree, hf_at_cmd, tvb, offset,
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i_char, ENC_NA | ENC_ASCII);
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}
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}
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if (i_at_cmd && i_at_cmd->name == NULL) {
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char *name;
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name = (char *) wmem_alloc(wmem_packet_scope(), i_char + 2);
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g_strlcpy(name, at_command, i_char + 1);
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name[i_char + 1] = '\0';
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proto_item_append_text(command_item, ": %s (Unknown)", name);
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proto_item_append_text(pitem, " (Unknown - Non-Standard HSP Command)");
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expert_add_info(pinfo, pitem, &ei_non_mandatory_command);
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} else if (i_at_cmd == NULL) {
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proto_item_append_text(command_item, ": AT");
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} else {
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proto_item_append_text(command_item, ": %s", i_at_cmd->name);
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}
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offset += i_char;
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if (i_at_cmd && g_strcmp0(i_at_cmd->name, "D")) {
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if (length >= 2 && at_command[i_char] == '=' && at_command[i_char + 1] == '?') {
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type = at_command[i_char] << 8 | at_command[i_char + 1];
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proto_tree_add_uint(command_tree, hf_at_cmd_type, tvb, offset, 2, type);
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offset += 2;
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i_char += 2;
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} else if (role == ROLE_AG && length >= 2 && at_command[i_char] == '\r' && at_command[i_char + 1] == '\n') {
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type = at_command[i_char] << 8 | at_command[i_char + 1];
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proto_tree_add_uint(command_tree, hf_at_cmd_type, tvb, offset, 2, type);
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offset += 2;
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i_char += 2;
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} else if (length >= 1 && (at_command[i_char] == '=' ||
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at_command[i_char] == '\r' ||
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at_command[i_char] == ':' ||
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at_command[i_char] == '?')) {
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type = at_command[i_char];
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proto_tree_add_uint(command_tree, hf_at_cmd_type, tvb, offset, 1, type);
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offset += 1;
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i_char += 1;
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}
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}
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if (i_at_cmd && i_at_cmd->check_command && !i_at_cmd->check_command(role, type)) {
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expert_add_info(pinfo, command_item, &ei_invalid_usage);
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}
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parameters_item = proto_tree_add_none_format(command_tree, hf_parameters, tvb,
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offset, 0, "Parameters");
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parameters_tree = proto_item_add_subtree(parameters_item, ett_bthsp_parameters);
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data = NULL;
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while (i_char < length) {
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while (at_command[i_char] == ' ' || at_command[i_char] == '\t') {
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offset += 1;
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i_char += 1;
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}
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parameter_length = 0;
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brackets = 0;
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quotation = FALSE;
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next = FALSE;
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|
|
if (at_command[i_char + parameter_length] != '\r') {
|
|
while (i_char + parameter_length < length &&
|
|
at_command[i_char + parameter_length] != '\r') {
|
|
|
|
if (at_command[i_char + parameter_length] == ';') {
|
|
next = TRUE;
|
|
break;
|
|
}
|
|
|
|
if (at_command[i_char + parameter_length] == '"') {
|
|
quotation = quotation ? FALSE : TRUE;
|
|
}
|
|
|
|
if (quotation == TRUE) {
|
|
parameter_length += 1;
|
|
continue;
|
|
}
|
|
|
|
if (at_command[i_char + parameter_length] == '(') {
|
|
brackets += 1;
|
|
}
|
|
if (at_command[i_char + parameter_length] == ')') {
|
|
brackets -= 1;
|
|
}
|
|
|
|
if (brackets == 0 && at_command[i_char + parameter_length] == ',') {
|
|
break;
|
|
}
|
|
|
|
parameter_length += 1;
|
|
}
|
|
|
|
/* TODO: Save bthsp.at_cmd, bthsp.at_cmd.type, frame_time and frame_num here in
|
|
|
|
if (role == ROLE_HS && pinfo->fd->flags.visited == 0) {
|
|
|
|
at_cmd_db = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
|
|
|
|
interface_id
|
|
adapter_id
|
|
chandle
|
|
dlci
|
|
|
|
frame_number
|
|
-------------------
|
|
at_command
|
|
at_type
|
|
frame_num
|
|
frame_time
|
|
status
|
|
first_response_in (if 0 - no response)
|
|
|
|
|
|
interface_id = interface_id;
|
|
adapter_id = adapter_id;
|
|
chandle = chandle;
|
|
dlci = dlci;
|
|
frame_number = pinfo->num;
|
|
|
|
|
|
key[0].length = 1;
|
|
key[0].key = &interface_id;
|
|
key[1].length = 1;
|
|
key[1].key = &adapter_id;
|
|
key[2].length = 1;
|
|
key[2].key = &chandle;
|
|
key[3].length = 1;
|
|
key[3].key = &dlci;
|
|
key[4].length = 1;
|
|
key[4].key = &frame_number;
|
|
key[5].length = 0;
|
|
key[5].key = NULL;
|
|
|
|
cmd = wmem_new(wmem_file_scope(), at_cmd_entry_t);
|
|
cmd->interface_id = interface_id;
|
|
cmd->adapter_id = adapter_id;
|
|
cmd->chandle = chandle;
|
|
cmd->dlci = dlci;
|
|
|
|
cmd->frame_number = pinfo->num;
|
|
cmd->status = STATUS_NO_RESPONSE;
|
|
cmd->time = pinfo->abs_ts;
|
|
cmd->at_command
|
|
cmd->at_type
|
|
cmd->first_response_in = 0;
|
|
|
|
wmem_tree_insert32_array(at_cmd_db, key, cmd);
|
|
}
|
|
|
|
*/
|
|
|
|
first_parameter_offset = offset;
|
|
if (type == TYPE_ACTION || type == TYPE_RESPONSE) {
|
|
if (i_at_cmd && (i_at_cmd->dissect_parameter != NULL &&
|
|
!i_at_cmd->dissect_parameter(tvb, pinfo, parameters_tree, offset, role,
|
|
type, &at_command[i_char], parameter_number, parameter_length, &data) )) {
|
|
pitem = proto_tree_add_item(parameters_tree,
|
|
hf_unknown_parameter, tvb, offset,
|
|
parameter_length, ENC_NA | ENC_ASCII);
|
|
expert_add_info(pinfo, pitem, &ei_unknown_parameter);
|
|
} else if (i_at_cmd && i_at_cmd->dissect_parameter == NULL) {
|
|
proto_tree_add_item(parameters_tree, hf_parameter, tvb, offset,
|
|
parameter_length, ENC_NA | ENC_ASCII);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (type != TYPE_ACTION_SIMPLY && type != TYPE_RESPONSE_ACK && type != TYPE_TEST && type != TYPE_READ)
|
|
parameter_number += 1;
|
|
i_char += parameter_length;
|
|
offset += parameter_length;
|
|
last_parameter_offset = offset;
|
|
|
|
if (role == ROLE_AG &&
|
|
i_char + 1 <= length &&
|
|
at_command[i_char] == '\r' &&
|
|
at_command[i_char + 1] == '\n') {
|
|
offset += 2;
|
|
i_char += 2;
|
|
break;
|
|
} else if (at_command[i_char] == ',' ||
|
|
at_command[i_char] == '\r' ||
|
|
at_command[i_char] == ';') {
|
|
i_char += 1;
|
|
offset += 1;
|
|
}
|
|
|
|
if (next) break;
|
|
}
|
|
|
|
i_char += i_char_fix;
|
|
proto_item_set_len(command_item, i_char);
|
|
} else {
|
|
length = tvb_reported_length_remaining(tvb, offset);
|
|
if (length < 0)
|
|
length = 0;
|
|
proto_item_set_len(command_item, length);
|
|
offset += length;
|
|
}
|
|
|
|
if (parameter_number > 0 && last_parameter_offset - first_parameter_offset > 0)
|
|
proto_item_set_len(parameters_item, last_parameter_offset - first_parameter_offset);
|
|
else
|
|
proto_item_append_text(parameters_item, ": No");
|
|
|
|
if (role == ROLE_AG) {
|
|
guint command_frame_number = 0;
|
|
|
|
if (command_frame_number) {
|
|
pitem = proto_tree_add_uint(command_tree, hf_command_in, tvb, offset,
|
|
0, command_frame_number);
|
|
PROTO_ITEM_SET_GENERATED(pitem);
|
|
} else {
|
|
pitem = proto_tree_add_item(command_tree, hf_unsolicited, tvb, offset, 0, ENC_NA);
|
|
PROTO_ITEM_SET_GENERATED(pitem);
|
|
}
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
static gint
|
|
dissect_bthsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
|
|
{
|
|
proto_item *main_item;
|
|
proto_tree *main_tree;
|
|
proto_item *pitem;
|
|
gint offset = 0;
|
|
guint32 role = ROLE_UNKNOWN;
|
|
wmem_tree_key_t key[10];
|
|
guint32 interface_id;
|
|
guint32 adapter_id;
|
|
guint32 chandle;
|
|
guint32 dlci;
|
|
guint32 frame_number;
|
|
guint32 direction;
|
|
guint32 bd_addr_oui;
|
|
guint32 bd_addr_id;
|
|
fragment_t *fragment;
|
|
fragment_t *previous_fragment;
|
|
fragment_t *i_fragment;
|
|
guint8 *at_stream;
|
|
gint length;
|
|
gint command_number;
|
|
gint i_length;
|
|
tvbuff_t *reassembled_tvb = NULL;
|
|
guint reassemble_start_offset = 0;
|
|
guint reassemble_end_offset = 0;
|
|
gint previous_proto;
|
|
|
|
previous_proto = (GPOINTER_TO_INT(wmem_list_frame_data(wmem_list_frame_prev(wmem_list_tail(pinfo->layers)))));
|
|
if (data && previous_proto == proto_btrfcomm) {
|
|
btrfcomm_data_t *rfcomm_data;
|
|
|
|
rfcomm_data = (btrfcomm_data_t *) data;
|
|
|
|
interface_id = rfcomm_data->interface_id;
|
|
adapter_id = rfcomm_data->adapter_id;
|
|
chandle = rfcomm_data->chandle;
|
|
dlci = rfcomm_data->dlci;
|
|
direction = (rfcomm_data->is_local_psm) ? P2P_DIR_SENT : P2P_DIR_RECV;
|
|
|
|
if (direction == P2P_DIR_RECV) {
|
|
bd_addr_oui = rfcomm_data->remote_bd_addr_oui;
|
|
bd_addr_id = rfcomm_data->remote_bd_addr_id;
|
|
} else {
|
|
bd_addr_oui = 0;
|
|
bd_addr_id = 0;
|
|
}
|
|
} else {
|
|
interface_id = HCI_INTERFACE_DEFAULT;
|
|
adapter_id = HCI_ADAPTER_DEFAULT;
|
|
chandle = 0;
|
|
dlci = 0;
|
|
direction = P2P_DIR_UNKNOWN;
|
|
|
|
bd_addr_oui = 0;
|
|
bd_addr_id = 0;
|
|
}
|
|
|
|
main_item = proto_tree_add_item(tree, proto_bthsp, tvb, 0, tvb_captured_length(tvb), ENC_NA);
|
|
main_tree = proto_item_add_subtree(main_item, ett_bthsp);
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "HSP");
|
|
|
|
switch (pinfo->p2p_dir) {
|
|
case P2P_DIR_SENT:
|
|
col_set_str(pinfo->cinfo, COL_INFO, "Sent ");
|
|
break;
|
|
case P2P_DIR_RECV:
|
|
col_set_str(pinfo->cinfo, COL_INFO, "Rcvd ");
|
|
break;
|
|
default:
|
|
col_set_str(pinfo->cinfo, COL_INFO, "UnknownDirection ");
|
|
break;
|
|
}
|
|
|
|
if ((hsp_role == ROLE_AG && pinfo->p2p_dir == P2P_DIR_SENT) ||
|
|
(hsp_role == ROLE_HS && pinfo->p2p_dir == P2P_DIR_RECV)) {
|
|
role = ROLE_AG;
|
|
} else if (hsp_role != ROLE_UNKNOWN) {
|
|
role = ROLE_HS;
|
|
}
|
|
|
|
if (role == ROLE_UNKNOWN) {
|
|
guint32 sdp_psm;
|
|
guint32 service_type;
|
|
guint32 service_channel;
|
|
service_info_t *service_info;
|
|
|
|
sdp_psm = SDP_PSM_DEFAULT;
|
|
|
|
service_type = BTSDP_RFCOMM_PROTOCOL_UUID;
|
|
service_channel = dlci >> 1;
|
|
frame_number = pinfo->num;
|
|
|
|
key[0].length = 1;
|
|
key[0].key = &interface_id;
|
|
key[1].length = 1;
|
|
key[1].key = &adapter_id;
|
|
key[2].length = 1;
|
|
key[2].key = &sdp_psm;
|
|
key[3].length = 1;
|
|
key[3].key = &direction;
|
|
key[4].length = 1;
|
|
key[4].key = &bd_addr_oui;
|
|
key[5].length = 1;
|
|
key[5].key = &bd_addr_id;
|
|
key[6].length = 1;
|
|
key[6].key = &service_type;
|
|
key[7].length = 1;
|
|
key[7].key = &service_channel;
|
|
key[8].length = 1;
|
|
key[8].key = &frame_number;
|
|
key[9].length = 0;
|
|
key[9].key = NULL;
|
|
|
|
service_info = btsdp_get_service_info(key);
|
|
if (service_info && service_info->interface_id == interface_id &&
|
|
service_info->adapter_id == adapter_id &&
|
|
service_info->sdp_psm == SDP_PSM_DEFAULT &&
|
|
((service_info->direction == P2P_DIR_RECV &&
|
|
service_info->bd_addr_oui == bd_addr_oui &&
|
|
service_info->bd_addr_id == bd_addr_id) ||
|
|
(service_info->direction != P2P_DIR_RECV &&
|
|
service_info->bd_addr_oui == 0 &&
|
|
service_info->bd_addr_id == 0)) &&
|
|
service_info->type == BTSDP_RFCOMM_PROTOCOL_UUID &&
|
|
service_info->channel == (dlci >> 1)) {
|
|
if ((service_info->uuid.bt_uuid == BTSDP_HSP_GW_SERVICE_UUID && service_info->direction == P2P_DIR_RECV && pinfo->p2p_dir == P2P_DIR_SENT) ||
|
|
(service_info->uuid.bt_uuid == BTSDP_HSP_GW_SERVICE_UUID && service_info->direction == P2P_DIR_SENT && pinfo->p2p_dir == P2P_DIR_RECV) ||
|
|
((service_info->uuid.bt_uuid == BTSDP_HSP_SERVICE_UUID || service_info->uuid.bt_uuid == BTSDP_HSP_HS_SERVICE_UUID) && service_info->direction == P2P_DIR_RECV && pinfo->p2p_dir == P2P_DIR_RECV) ||
|
|
((service_info->uuid.bt_uuid == BTSDP_HSP_SERVICE_UUID || service_info->uuid.bt_uuid == BTSDP_HSP_HS_SERVICE_UUID) && service_info->direction == P2P_DIR_SENT && pinfo->p2p_dir == P2P_DIR_SENT)) {
|
|
role = ROLE_HS;
|
|
} else {
|
|
role = ROLE_AG;
|
|
}
|
|
}
|
|
}
|
|
|
|
pitem = proto_tree_add_uint(main_tree, hf_role, tvb, 0, 0, role);
|
|
PROTO_ITEM_SET_GENERATED(pitem);
|
|
|
|
if (role == ROLE_UNKNOWN) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "Data: %s",
|
|
tvb_format_text(tvb, 0, tvb_reported_length(tvb)));
|
|
proto_tree_add_item(main_tree, hf_data, tvb, 0, tvb_captured_length(tvb), ENC_NA | ENC_ASCII);
|
|
return tvb_reported_length(tvb);
|
|
}
|
|
|
|
/* save fragments */
|
|
if (!pinfo->fd->flags.visited) {
|
|
frame_number = pinfo->num - 1;
|
|
|
|
key[0].length = 1;
|
|
key[0].key = &interface_id;
|
|
key[1].length = 1;
|
|
key[1].key = &adapter_id;
|
|
key[2].length = 1;
|
|
key[2].key = &chandle;
|
|
key[3].length = 1;
|
|
key[3].key = &dlci;
|
|
key[4].length = 1;
|
|
key[4].key = &role;
|
|
key[5].length = 1;
|
|
key[5].key = &frame_number;
|
|
key[6].length = 0;
|
|
key[6].key = NULL;
|
|
|
|
previous_fragment = (fragment_t *) wmem_tree_lookup32_array_le(fragments, key);
|
|
if (!(previous_fragment && previous_fragment->interface_id == interface_id &&
|
|
previous_fragment->adapter_id == adapter_id &&
|
|
previous_fragment->chandle == chandle &&
|
|
previous_fragment->dlci == dlci &&
|
|
previous_fragment->role == role &&
|
|
previous_fragment->reassemble_state != REASSEMBLE_DONE)) {
|
|
previous_fragment = NULL;
|
|
}
|
|
|
|
frame_number = pinfo->num;
|
|
|
|
key[0].length = 1;
|
|
key[0].key = &interface_id;
|
|
key[1].length = 1;
|
|
key[1].key = &adapter_id;
|
|
key[2].length = 1;
|
|
key[2].key = &chandle;
|
|
key[3].length = 1;
|
|
key[3].key = &dlci;
|
|
key[4].length = 1;
|
|
key[4].key = &role;
|
|
key[5].length = 1;
|
|
key[5].key = &frame_number;
|
|
key[6].length = 0;
|
|
key[6].key = NULL;
|
|
|
|
fragment = wmem_new(wmem_file_scope(), fragment_t);
|
|
fragment->interface_id = interface_id;
|
|
fragment->adapter_id = adapter_id;
|
|
fragment->chandle = chandle;
|
|
fragment->dlci = dlci;
|
|
fragment->role = role;
|
|
fragment->idx = previous_fragment ? previous_fragment->idx + previous_fragment->length : 0;
|
|
fragment->reassemble_state = REASSEMBLE_FRAGMENT;
|
|
fragment->length = tvb_reported_length(tvb);
|
|
fragment->data = (guint8 *) wmem_alloc(wmem_file_scope(), fragment->length);
|
|
fragment->previous_fragment = previous_fragment;
|
|
tvb_memcpy(tvb, fragment->data, offset, fragment->length);
|
|
|
|
wmem_tree_insert32_array(fragments, key, fragment);
|
|
|
|
/* Detect reassemble end character: \r for HS or \n for AG */
|
|
length = tvb_reported_length(tvb);
|
|
at_stream = tvb_get_string_enc(wmem_packet_scope(), tvb, 0, length, ENC_ASCII);
|
|
|
|
reassemble_start_offset = 0;
|
|
|
|
for (i_length = 0; i_length < length; i_length += 1) {
|
|
if (!((role == ROLE_HS && at_stream[i_length] == '\r') ||
|
|
(role == ROLE_AG && at_stream[i_length] == '\n'))) {
|
|
continue;
|
|
}
|
|
|
|
if (role == ROLE_HS && at_stream[i_length] == '\r') {
|
|
reassemble_start_offset = i_length + 1;
|
|
if (reassemble_end_offset == 0) reassemble_end_offset = i_length + 1;
|
|
}
|
|
|
|
if (role == ROLE_AG && at_stream[i_length] == '\n') {
|
|
reassemble_start_offset = i_length + 1;
|
|
}
|
|
|
|
frame_number = pinfo->num;
|
|
|
|
key[0].length = 1;
|
|
key[0].key = &interface_id;
|
|
key[1].length = 1;
|
|
key[1].key = &adapter_id;
|
|
key[2].length = 1;
|
|
key[2].key = &chandle;
|
|
key[3].length = 1;
|
|
key[3].key = &dlci;
|
|
key[4].length = 1;
|
|
key[4].key = &role;
|
|
key[5].length = 1;
|
|
key[5].key = &frame_number;
|
|
key[6].length = 0;
|
|
key[6].key = NULL;
|
|
|
|
fragment = (fragment_t *) wmem_tree_lookup32_array_le(fragments, key);
|
|
if (fragment && fragment->interface_id == interface_id &&
|
|
fragment->adapter_id == adapter_id &&
|
|
fragment->chandle == chandle &&
|
|
fragment->dlci == dlci &&
|
|
fragment->role == role) {
|
|
i_fragment = fragment;
|
|
while (i_fragment && i_fragment->idx > 0) {
|
|
i_fragment = i_fragment->previous_fragment;
|
|
}
|
|
|
|
if (i_length + 1 == length &&
|
|
role == ROLE_HS &&
|
|
at_stream[i_length] == '\r') {
|
|
fragment->reassemble_state = REASSEMBLE_DONE;
|
|
} else if (i_length + 1 == length &&
|
|
role == ROLE_AG &&
|
|
i_length >= 4 &&
|
|
at_stream[i_length] == '\n' &&
|
|
at_stream[i_length - 1] == '\r' &&
|
|
at_stream[0] == '\r' &&
|
|
at_stream[1] == '\n') {
|
|
fragment->reassemble_state = REASSEMBLE_DONE;
|
|
} else if (i_length + 1 == length &&
|
|
role == ROLE_AG &&
|
|
i_length >= 2 &&
|
|
at_stream[i_length] == '\n' &&
|
|
at_stream[i_length - 1] == '\r' &&
|
|
i_fragment &&
|
|
i_fragment->reassemble_state == REASSEMBLE_FRAGMENT &&
|
|
i_fragment->length >= 2 &&
|
|
i_fragment->data[0] == '\r' &&
|
|
i_fragment->data[1] == '\n') {
|
|
fragment->reassemble_state = REASSEMBLE_DONE;
|
|
} else if (role == ROLE_HS) {
|
|
/* XXX: Temporary disable reassembling of partial message, it seems to be broken */
|
|
/* fragment->reassemble_state = REASSEMBLE_PARTIALLY;*/
|
|
}
|
|
fragment->reassemble_start_offset = reassemble_start_offset;
|
|
fragment->reassemble_end_offset = reassemble_end_offset;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* recover reassembled payload */
|
|
frame_number = pinfo->num;
|
|
|
|
key[0].length = 1;
|
|
key[0].key = &interface_id;
|
|
key[1].length = 1;
|
|
key[1].key = &adapter_id;
|
|
key[2].length = 1;
|
|
key[2].key = &chandle;
|
|
key[3].length = 1;
|
|
key[3].key = &dlci;
|
|
key[4].length = 1;
|
|
key[4].key = &role;
|
|
key[5].length = 1;
|
|
key[5].key = &frame_number;
|
|
key[6].length = 0;
|
|
key[6].key = NULL;
|
|
|
|
fragment = (fragment_t *) wmem_tree_lookup32_array_le(fragments, key);
|
|
if (fragment && fragment->interface_id == interface_id &&
|
|
fragment->adapter_id == adapter_id &&
|
|
fragment->chandle == chandle &&
|
|
fragment->dlci == dlci &&
|
|
fragment->role == role &&
|
|
fragment->reassemble_state != REASSEMBLE_FRAGMENT) {
|
|
guint8 *at_data;
|
|
guint i_data_offset;
|
|
|
|
i_data_offset = fragment->idx + fragment->length;
|
|
at_data = (guint8 *) wmem_alloc(pinfo->pool, fragment->idx + fragment->length);
|
|
|
|
i_fragment = fragment;
|
|
|
|
if (i_fragment && i_fragment->reassemble_state == REASSEMBLE_PARTIALLY) {
|
|
i_data_offset -= i_fragment->reassemble_end_offset;
|
|
memcpy(at_data + i_data_offset, i_fragment->data, i_fragment->reassemble_end_offset);
|
|
i_fragment = i_fragment->previous_fragment;
|
|
}
|
|
|
|
if (i_fragment) {
|
|
while (i_fragment && i_fragment->idx > 0) {
|
|
i_data_offset -= i_fragment->length;
|
|
memcpy(at_data + i_data_offset, i_fragment->data, i_fragment->length);
|
|
i_fragment = i_fragment->previous_fragment;
|
|
}
|
|
|
|
if (i_fragment && i_fragment->reassemble_state == REASSEMBLE_PARTIALLY) {
|
|
i_data_offset -= (i_fragment->length - i_fragment->reassemble_start_offset);
|
|
memcpy(at_data + i_data_offset, i_fragment->data + i_fragment->reassemble_start_offset,
|
|
i_fragment->length - i_fragment->reassemble_start_offset);
|
|
} else if (i_fragment) {
|
|
i_data_offset -= i_fragment->length;
|
|
memcpy(at_data + i_data_offset, i_fragment->data, i_fragment->length);
|
|
}
|
|
}
|
|
|
|
if (fragment->idx > 0 && fragment->length > 0) {
|
|
proto_tree_add_item(main_tree, hf_fragment, tvb, offset,
|
|
tvb_captured_length_remaining(tvb, offset), ENC_ASCII | ENC_NA);
|
|
reassembled_tvb = tvb_new_child_real_data(tvb, at_data,
|
|
fragment->idx + fragment->length, fragment->idx + fragment->length);
|
|
add_new_data_source(pinfo, reassembled_tvb, "Reassembled HSP");
|
|
}
|
|
|
|
command_number = 0;
|
|
if (reassembled_tvb) {
|
|
guint reassembled_offset = 0;
|
|
|
|
while (tvb_reported_length(reassembled_tvb) > reassembled_offset) {
|
|
reassembled_offset = dissect_at_command(reassembled_tvb,
|
|
pinfo, main_tree, reassembled_offset, role, command_number);
|
|
command_number += 1;
|
|
}
|
|
offset = tvb_captured_length(tvb);
|
|
} else {
|
|
while (tvb_reported_length(tvb) > (guint) offset) {
|
|
offset = dissect_at_command(tvb, pinfo, main_tree, offset, role, command_number);
|
|
command_number += 1;
|
|
}
|
|
}
|
|
} else {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "Fragment: %s",
|
|
tvb_format_text_wsp(wmem_packet_scope(), tvb, offset, tvb_captured_length_remaining(tvb, offset)));
|
|
pitem = proto_tree_add_item(main_tree, hf_fragmented, tvb, 0, 0, ENC_NA);
|
|
PROTO_ITEM_SET_GENERATED(pitem);
|
|
proto_tree_add_item(main_tree, hf_fragment, tvb, offset,
|
|
tvb_captured_length_remaining(tvb, offset), ENC_ASCII | ENC_NA);
|
|
offset = tvb_captured_length(tvb);
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
void
|
|
proto_register_bthsp(void)
|
|
{
|
|
module_t *module;
|
|
expert_module_t *expert_bthsp;
|
|
|
|
static hf_register_info hf[] = {
|
|
{ &hf_command,
|
|
{ "Command", "bthsp.command",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_parameters,
|
|
{ "Parameters", "bthsp.parameters",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_command_in,
|
|
{ "Command frame number in", "bthsp.command_in",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_unsolicited,
|
|
{ "Unsolicited", "bthsp.unsolicited",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_data,
|
|
{ "AT Stream", "bthsp.data",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_fragment,
|
|
{ "Fragment", "bthsp.fragment",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_fragmented,
|
|
{ "Fragmented", "bthsp.fragmented",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_at_ignored,
|
|
{ "Ignored", "bthsp.ignored",
|
|
FT_BYTES, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_at_cmd,
|
|
{ "Command", "bthsp.at_cmd",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_at_cmd_type,
|
|
{ "Type", "bthsp.at_cmd.type",
|
|
FT_UINT16, BASE_HEX, VALS(at_cmd_type_vals), 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_at_command_line_prefix,
|
|
{ "Command Line Prefix", "bthsp.command_line_prefix",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_parameter,
|
|
{ "Parameter", "bthsp.parameter",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_unknown_parameter,
|
|
{ "Unknown Parameter", "bthsp.unknown_parameter",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_role,
|
|
{ "Role", "bthsp.role",
|
|
FT_UINT8, BASE_DEC, VALS(role_vals), 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_vgs,
|
|
{ "Gain", "bthsp.vgs",
|
|
FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_slash15, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_vgm,
|
|
{ "Gain", "bthsp.vgm",
|
|
FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_slash15, 0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_ckpd,
|
|
{ "Key", "bthsp.ckpd",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL}
|
|
}
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_non_mandatory_command, { "bthsp.expert.non_mandatory_command", PI_PROTOCOL, PI_NOTE, "Non-mandatory command in HSP", EXPFILL }},
|
|
{ &ei_invalid_usage, { "bthsp.expert.invalid_usage", PI_PROTOCOL, PI_WARN, "Non mandatory type or command in this role", EXPFILL }},
|
|
{ &ei_unknown_parameter, { "bthsp.expert.unknown_parameter", PI_PROTOCOL, PI_WARN, "Unknown parameter", EXPFILL }},
|
|
{ &ei_vgm_gain, { "bthsp.expert.vgm", PI_PROTOCOL, PI_WARN, "Gain of microphone exceeds range 0-15", EXPFILL }},
|
|
{ &ei_vgs_gain, { "bthsp.expert.vgs", PI_PROTOCOL, PI_WARN, "Gain of speaker exceeds range 0-15", EXPFILL }},
|
|
{ &ei_ckpd, { "bthsp.expert.ckpd", PI_PROTOCOL, PI_WARN, "Only key 200 is covered in HSP", EXPFILL }} };
|
|
|
|
static gint *ett[] = {
|
|
&ett_bthsp,
|
|
&ett_bthsp_command,
|
|
&ett_bthsp_parameters
|
|
};
|
|
|
|
fragments = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
|
|
|
|
proto_bthsp = proto_register_protocol("Bluetooth HSP Profile", "BT HSP", "bthsp");
|
|
bthsp_handle = register_dissector("bthsp", dissect_bthsp, proto_bthsp);
|
|
|
|
proto_register_field_array(proto_bthsp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
module = prefs_register_protocol(proto_bthsp, NULL);
|
|
prefs_register_static_text_preference(module, "hsp.version",
|
|
"Bluetooth Profile HSP version: 1.2",
|
|
"Version of profile supported by this dissector.");
|
|
|
|
prefs_register_enum_preference(module, "hsp.hsp_role",
|
|
"Force treat packets as AG or HS role",
|
|
"Force treat packets as AG or HS role",
|
|
&hsp_role, pref_hsp_role, TRUE);
|
|
|
|
expert_bthsp = expert_register_protocol(proto_bthsp);
|
|
expert_register_field_array(expert_bthsp, ei, array_length(ei));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_bthsp(void)
|
|
{
|
|
dissector_add_string("bluetooth.uuid", "1108", bthsp_handle);
|
|
dissector_add_string("bluetooth.uuid", "1112", bthsp_handle);
|
|
dissector_add_string("bluetooth.uuid", "1131", bthsp_handle);
|
|
|
|
dissector_add_for_decode_as("btrfcomm.dlci", bthsp_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:
|
|
*/
|