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wireshark/epan/dissectors/packet-btl2cap.c

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/* packet-btl2cap.c
* Routines for the Bluetooth L2CAP 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
*
* Added handling and reassembly of LE-Frames
* Anders Broman at ericsson dot com 2016
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/exceptions.h>
#include <epan/expert.h>
#include <epan/decode_as.h>
#include <epan/proto_data.h>
#include <epan/reassemble.h>
#include <wiretap/wtap.h>
#include "packet-bluetooth.h"
#include "packet-bthci_acl.h"
#include "packet-btsdp.h"
#include "packet-btl2cap.h"
/* Initialize the protocol and registered fields */
int proto_btl2cap = -1;
static int hf_btl2cap_length = -1;
static int hf_btl2cap_cid = -1;
static int hf_btl2cap_payload = -1;
static int hf_btl2cap_command = -1;
static int hf_btl2cap_cmd_code = -1;
static int hf_btl2cap_cmd_ident = -1;
static int hf_btl2cap_cmd_length = -1;
static int hf_btl2cap_cmd_data = -1;
static int hf_btl2cap_psm = -1;
static int hf_btl2cap_psm_dynamic = -1;
static int hf_btl2cap_scid = -1;
static int hf_btl2cap_dcid = -1;
static int hf_btl2cap_icid = -1;
static int hf_btl2cap_controller = -1;
static int hf_btl2cap_dcontroller = -1;
static int hf_btl2cap_result = -1;
static int hf_btl2cap_move_result = -1;
static int hf_btl2cap_move_confirmation_result = -1;
static int hf_btl2cap_status = -1;
static int hf_btl2cap_rej_reason = -1;
static int hf_btl2cap_sig_mtu = -1;
static int hf_btl2cap_info_mtu = -1;
static int hf_btl2cap_info_flowcontrol = -1;
static int hf_btl2cap_info_retransmission = -1;
static int hf_btl2cap_info_bidirqos = -1;
static int hf_btl2cap_info_enh_retransmission = -1;
static int hf_btl2cap_info_streaming = -1;
static int hf_btl2cap_info_fcs = -1;
static int hf_btl2cap_info_flow_spec = -1;
static int hf_btl2cap_info_fixedchan = -1;
static int hf_btl2cap_info_fixedchans = -1;
static int hf_btl2cap_info_fixedchans_null = -1;
static int hf_btl2cap_info_fixedchans_signal = -1;
static int hf_btl2cap_info_fixedchans_connless = -1;
static int hf_btl2cap_info_fixedchans_amp_man = -1;
static int hf_btl2cap_info_fixedchans_amp_test = -1;
static int hf_btl2cap_info_window = -1;
static int hf_btl2cap_info_unicast = -1;
static int hf_btl2cap_info_type = -1;
static int hf_btl2cap_info_result = -1;
static int hf_btl2cap_configuration_result = -1;
static int hf_btl2cap_info_extfeatures = -1;
static int hf_btl2cap_option = -1;
static int hf_btl2cap_option_type = -1;
static int hf_btl2cap_option_length = -1;
static int hf_btl2cap_option_mtu = -1;
static int hf_btl2cap_option_flushTO = -1;
static int hf_btl2cap_option_flush_to_us = -1;
static int hf_btl2cap_option_flags = -1;
static int hf_btl2cap_option_service_type = -1;
static int hf_btl2cap_option_tokenrate = -1;
static int hf_btl2cap_option_tokenbucketsize = -1;
static int hf_btl2cap_option_peakbandwidth = -1;
static int hf_btl2cap_option_latency = -1;
static int hf_btl2cap_option_delayvariation = -1;
static int hf_btl2cap_option_retransmissionmode = -1;
static int hf_btl2cap_option_txwindow = -1;
static int hf_btl2cap_option_maxtransmit = -1;
static int hf_btl2cap_option_retransmittimeout = -1;
static int hf_btl2cap_option_monitortimeout = -1;
static int hf_btl2cap_option_mps = -1;
static int hf_btl2cap_option_fcs = -1;
static int hf_btl2cap_option_window = -1;
static int hf_btl2cap_option_identifier = -1;
static int hf_btl2cap_option_sdu_size = -1;
static int hf_btl2cap_option_sdu_arrival_time = -1;
static int hf_btl2cap_option_access_latency = -1;
static int hf_btl2cap_control = -1;
static int hf_btl2cap_control_sar = -1;
static int hf_btl2cap_control_reqseq = -1;
static int hf_btl2cap_control_txseq = -1;
static int hf_btl2cap_control_retransmissiondisable = -1;
static int hf_btl2cap_control_supervisory = -1;
static int hf_btl2cap_control_type = -1;
static int hf_btl2cap_fcs = -1;
static int hf_btl2cap_sdulength = -1;
static int hf_btl2cap_continuation_to = -1;
static int hf_btl2cap_reassembled_in = -1;
static int hf_btl2cap_min_interval = -1;
static int hf_btl2cap_max_interval = -1;
static int hf_btl2cap_slave_latency = -1;
static int hf_btl2cap_timeout_multiplier = -1;
static int hf_btl2cap_conn_param_result = -1;
static int hf_btl2cap_credits = -1;
static int hf_btl2cap_initial_credits = -1;
static int hf_btl2cap_le_result = -1;
static int hf_btl2cap_le_psm = -1;
static int hf_btl2cap_flags_reserved = -1;
static int hf_btl2cap_flags_continuation = -1;
static int hf_btl2cap_data = -1;
static int hf_btl2cap_service = -1;
static int hf_btl2cap_connect_in_frame = -1;
static int hf_btl2cap_disconnect_in_frame = -1;
static int hf_btl2cap_le_sdu_fragments = -1;
static int hf_btl2cap_le_sdu_fragment = -1;
static int hf_btl2cap_le_sdu_fragment_overlap = -1;
static int hf_btl2cap_le_sdu_fragment_overlap_conflicts = -1;
static int hf_btl2cap_le_sdu_fragment_multiple_tails = -1;
static int hf_btl2cap_le_sdu_fragment_too_long_fragment = -1;
static int hf_btl2cap_le_sdu_fragment_error = -1;
static int hf_btl2cap_le_sdu_fragment_count = -1;
static int hf_btl2cap_le_sdu_reassembled_in = -1;
static int hf_btl2cap_le_sdu_reassembled_length = -1;
static int hf_btl2cap_le_sdu_length = -1;
/* Initialize the subtree pointers */
static gint ett_btl2cap = -1;
static gint ett_btl2cap_cmd = -1;
static gint ett_btl2cap_option = -1;
static gint ett_btl2cap_extfeatures = -1;
static gint ett_btl2cap_fixedchans = -1;
static gint ett_btl2cap_control = -1;
static gint ett_btl2cap_le_sdu_fragment = -1;
static gint ett_btl2cap_le_sdu_fragments = -1;
static expert_field ei_btl2cap_parameter_mismatch = EI_INIT;
static expert_field ei_btl2cap_sdulength_bad = EI_INIT;
static expert_field ei_btl2cap_length_bad = EI_INIT;
static expert_field ei_btl2cap_unknown_command_code = EI_INIT;
/* Initialize dissector table */
static dissector_table_t l2cap_psm_dissector_table;
static dissector_table_t l2cap_cid_dissector_table;
/* This table maps command identity values to psm values. */
static wmem_tree_t *cmd_ident_to_psm_table;
/* This table maps cid values to psm values.
* The same table is used both for SCID and DCID.
* For Remote CIDs (Receive Request SCID or Sent Response DCID)
* we 'or' the CID with 0x80000000 in this table
*/
static wmem_tree_t *cid_to_psm_table;
/* 5.4 RETRANSMISSION AND FLOW CONTROL OPTION
* Table 5.2
* Mode
* 0x00 L2CAP Basic Mode
* 0x01 Retransmission mode
* 0x02 Flow control mode
* 0x03 Enhanced Retransmission mode
* 0x04 Streaming mode
* Other values Reserved for future use
*/
#define L2CAP_BASIC_MODE 0
/* XXX Cheat and define a vaue for
* Connection-Oriented Channels in LE Credit Based Flow Control Mode
*/
#define L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE 0xff
typedef struct _config_data_t {
guint8 mode;
guint8 txwindow;
wmem_tree_t *start_fragments; /* indexed by pinfo->num */
/* Used for LE frame reassembly */
guint segmentation_started : 1; /* 0 = No, 1 = Yes */
guint segment_len_rem; /* The remaining segment length, used to find last segment */
} config_data_t;
typedef struct _sdu_reassembly_t
{
guint8 *reassembled;
guint8 seq;
guint32 first_frame;
guint32 last_frame;
guint16 tot_len;
int cur_off; /* counter used by reassembly */
} sdu_reassembly_t;
typedef struct _psm_data_t {
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
guint32 local_cid;
guint32 remote_cid;
guint16 psm;
gboolean local_service;
guint32 connect_in_frame;
guint32 disconnect_in_frame;
config_data_t in;
config_data_t out;
} psm_data_t;
typedef struct _btl2cap_frame_data_t
{
/* LE frames info */
guint first_fragment : 1; /* 0 = No, 1 = First or only fragment*/
guint more_fragments : 1; /* 0 = Last fragment, 1 = more fragments*/
} btl2cap_frame_data_t;
static const value_string command_code_vals[] = {
{ 0x01, "Command Reject" },
{ 0x02, "Connection Request" },
{ 0x03, "Connection Response" },
{ 0x04, "Configure Request" },
{ 0x05, "Configure Response" },
{ 0x06, "Disconnection Request" },
{ 0x07, "Disconnection Response" },
{ 0x08, "Echo Request" },
{ 0x09, "Echo Response" },
{ 0x0A, "Information Request" },
{ 0x0B, "Information Response" },
{ 0x0C, "Create Channel Request" },
{ 0x0D, "Create Channel Response" },
{ 0x0E, "Move Channel Request" },
{ 0x0F, "Move Channel Response" },
{ 0x10, "Move Channel Confirmation" },
{ 0x11, "Move Channel Confirmation Response" },
{ 0x12, "Connection Parameter Update Request" },
{ 0x13, "Connection Parameter Update Response" },
{ 0x14, "LE Credit Based Connection Request" },
{ 0x15, "LE Credit Based Connection Response" },
{ 0x16, "LE Flow Control Credit" },
{ 0, NULL }
};
static const value_string psm_vals[] = {
{ 0x0001, "SDP" },
{ 0x0003, "RFCOMM" },
{ 0x0005, "TCS-BIN" },
{ 0x0007, "TCS-BIN-CORDLESS" },
{ 0x000F, "BNEP" },
{ 0x0011, "HID-Control" },
{ 0x0013, "HID-Interrupt" },
{ 0x0015, "UPnP" },
{ 0x0017, "AVCTP-Control" },
{ 0x0019, "AVDTP" },
{ 0x001B, "AVCTP-Browsing" },
{ 0x001D, "UDI_C-Plane" },
{ 0x001F, "ATT" },
{ 0x0021, "3DSP" },
{ 0x0023, "IPSP" },
{ 0x0025, "OTS" },
{ 0, NULL }
};
value_string_ext ext_psm_vals = VALUE_STRING_EXT_INIT(psm_vals);
static const value_string result_vals[] = {
{ 0x0000, "Successful" },
{ 0x0001, "Pending" },
{ 0x0002, "Refused - PSM not supported" },
{ 0x0003, "Refused - security block" },
{ 0x0004, "Refused - no resources available" },
{ 0x0005, "Refused - Controller ID not supported" },
{ 0, NULL }
};
static const value_string le_result_vals[] = {
{ 0x0000, "Connection Successful" },
{ 0x0002, "Connection Refused - LE_PSM Not Supported" },
{ 0x0004, "Connection Refused - No Resources Available" },
{ 0x0005, "Connection Refused - Insufficient Authentication" },
{ 0x0006, "Connection Refused - Insufficient Authorization" },
{ 0x0007, "Connection Refused - Insufficient Encryption Key Size" },
{ 0x0008, "Connection Refused - Insufficient Encryption" },
{ 0, NULL }
};
static const value_string move_result_vals[] = {
{ 0x0000, "Success" },
{ 0x0001, "Pending" },
{ 0x0002, "Refused - Controller ID not supported" },
{ 0x0003, "Refused - New Controller ID is same as old" },
{ 0x0004, "Refused - Configuration not supported" },
{ 0x0005, "Refused - Move Channel collision" },
{ 0x0006, "Refused - Channel not allowed to be moved" },
{ 0, NULL }
};
static const value_string move_result_confirmation_vals[] = {
{ 0x0000, "Success - both sides succeed" },
{ 0x0001, "Failure - one or both sides refuse" },
{ 0, NULL }
};
static const value_string configuration_result_vals[] = {
{ 0x0000, "Success"},
{ 0x0001, "Failure - unacceptable parameters" },
{ 0x0002, "Failure - reject (no reason provided)" },
{ 0x0003, "Failure - unknown options" },
{ 0x0004, "Pending" },
{ 0x0005, "Failure - flow spec rejected" },
{ 0, NULL }
};
static const value_string conn_param_result_vals[] = {
{ 0x0000, "Accepted" },
{ 0x0001, "Rejected" },
{ 0, NULL }
};
static const value_string status_vals[] = {
{ 0x0000, "No further information available" },
{ 0x0001, "Authentication pending" },
{ 0x0002, "Authorization pending" },
{ 0, NULL }
};
static const value_string reason_vals[] = {
{ 0x0000, "Command not understood" },
{ 0x0001, "Signaling MTU exceeded" },
{ 0x0002, "Invalid CID in request" },
{ 0, NULL }
};
static const value_string info_type_vals[] = {
{ 0x0001, "Connectionless MTU" },
{ 0x0002, "Extended Features Mask" },
{ 0x0003, "Fixed Channels Supported" },
{ 0, NULL }
};
static const value_string info_result_vals[] = {
{ 0x0000, "Success" },
{ 0x0001, "Not Supported" },
{ 0, NULL }
};
static const value_string option_servicetype_vals[] = {
{ 0x00, "No traffic" },
{ 0x01, "Best effort (Default)" },
{ 0x02, "Guaranteed" },
{ 0, NULL }
};
static const value_string option_type_vals[] = {
{ 0x01, "Maximum Transmission Unit" },
{ 0x02, "Flush Timeout" },
{ 0x03, "Quality of Service" },
{ 0x04, "Retransmission and Flow Control" },
{ 0x05, "FCS" },
{ 0x06, "Extended Flow Specification" },
{ 0x07, "Extended Window Size" },
{ 0, NULL }
};
static const value_string option_retransmissionmode_vals[] = {
{ 0x00, "Basic Mode" },
{ 0x01, "Retransmission Mode" },
{ 0x02, "Flow Control Mode" },
{ 0x03, "Enhanced Retransmission Mode" },
{ 0x04, "Streaming Mode" },
{ 0, NULL }
};
static const value_string control_sar_vals[] = {
{ 0x00, "Unsegmented" },
{ 0x01, "Start" },
{ 0x02, "End" },
{ 0x03, "Continuation" },
{ 0, NULL }
};
static const value_string control_supervisory_vals[] = {
{ 0x00, "RR" },
{ 0x01, "REJ" },
{ 0x02, "RNR" },
{ 0x03, "SREJ" },
{ 0, NULL }
};
static const value_string control_type_vals[] = {
{ 0x00, "I-Frame" },
{ 0x01, "S-Frame" },
{ 0, NULL }
};
static const value_string option_fcs_vals[] = {
{ 0x00, "No FCS" },
{ 0x01, "16-bit FCS" },
{ 0, NULL }
};
static const value_string ctrl_id_code_vals[] = {
{ 0x00, "Bluetooth BR/EDR" },
{ 0x01, "Wifi 802.11" },
{ 0, NULL }
};
static const range_string cid_rvals[] = {
{ 0x0000, 0x0000, "Null identifier" },
{ 0x0001, 0x0001, "L2CAP Signaling Channel" },
{ 0x0002, 0x0002, "Connectionless Channel" },
{ 0x0003, 0x0003, "AMP Manager Protocol" },
{ 0x0004, 0x0004, "Attribute Protocol" },
{ 0x0005, 0x0005, "Low Energy L2CAP Signaling Channel" },
{ 0x0006, 0x0006, "Security Manager Protocol" },
{ 0x0007, 0x003E, "Reserved" },
{ 0x003F, 0x003F, "AMP Test Manager" },
{ 0x0040, 0xFFFF, "Dynamically Allocated Channel" },
{ 0, 0, NULL }
};
static const range_string le_psm_rvals[] = {
{ 0x0001, 0x007F, "Fixed, SIG Assigned" },
{ 0x0080, 0x00FF, "Dynamically Allocated" },
{ 0x0100, 0xFFFF, "Reserved" },
{ 0, 0, NULL }
};
static const unit_name_string units_ll_connection_event = { " LL Connection Event", " LL Connection Events" };
#define PROTO_DATA_BTL2CAP_CID 0
#define PROTO_DATA_BTL2CAP_PSM 1
void proto_register_btl2cap(void);
void proto_reg_handoff_btl2cap(void);
/* Reassembly */
static reassembly_table btl2cap_le_sdu_reassembly_table;
static const fragment_items btl2cap_le_sdu_frag_items = {
/* Fragment subtrees */
&ett_btl2cap_le_sdu_fragment,
&ett_btl2cap_le_sdu_fragments,
/* Fragment fields */
&hf_btl2cap_le_sdu_fragments,
&hf_btl2cap_le_sdu_fragment,
&hf_btl2cap_le_sdu_fragment_overlap,
&hf_btl2cap_le_sdu_fragment_overlap_conflicts,
&hf_btl2cap_le_sdu_fragment_multiple_tails,
&hf_btl2cap_le_sdu_fragment_too_long_fragment,
&hf_btl2cap_le_sdu_fragment_error,
&hf_btl2cap_le_sdu_fragment_count,
/* Reassembled in field */
&hf_btl2cap_le_sdu_reassembled_in,
/* Reassembled length field */
&hf_btl2cap_le_sdu_reassembled_length,
/* Reassembled data field */
NULL,
/* Tag */
"BTL2CAP LE SDU fragments"
};
static void btl2cap_cid_prompt(packet_info *pinfo, gchar* result)
{
guint16 *value_data;
value_data = (guint16 *) p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_CID);
if (value_data)
snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "L2CAP CID 0x%04x as", (guint) *value_data);
else
snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Unknown L2CAP CID");
}
static gpointer btl2cap_cid_value(packet_info *pinfo)
{
guint16 *value_data;
value_data = (guint16 *) p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_CID);
if (value_data)
return GUINT_TO_POINTER((gulong)*value_data);
return NULL;
}
static void btl2cap_psm_prompt(packet_info *pinfo, gchar* result)
{
guint16 *value_data;
value_data = (guint16 *) p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM);
if (value_data)
snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "L2CAP PSM 0x%04x as", (guint) *value_data);
else
snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Unknown L2CAP PSM");
}
static gpointer btl2cap_psm_value(packet_info *pinfo)
{
guint16 *value_data;
value_data = (guint16 *) p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM);
if (value_data)
return GUINT_TO_POINTER((gulong)*value_data);
return NULL;
}
static guint16
get_service_uuid(packet_info *pinfo, btl2cap_data_t *l2cap_data, guint16 psm, gboolean is_local_psm)
{
wmem_tree_key_t key[10];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_sdp_psm;
guint32 k_direction;
guint32 k_bd_addr_oui;
guint32 k_bd_addr_id;
guint32 k_service_type;
guint32 k_service_channel;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 remote_bd_addr_oui;
guint32 remote_bd_addr_id;
service_info_t *service_info;
interface_id = l2cap_data->interface_id;
adapter_id = l2cap_data->adapter_id;
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_sdp_psm = SDP_PSM_DEFAULT;
k_direction = (is_local_psm) ? P2P_DIR_SENT : P2P_DIR_RECV;
if (k_direction == P2P_DIR_RECV) {
k_bd_addr_oui = l2cap_data->remote_bd_addr_oui;
k_bd_addr_id = l2cap_data->remote_bd_addr_id;
} else {
k_bd_addr_oui = 0;
k_bd_addr_id = 0;
}
remote_bd_addr_oui = k_bd_addr_oui;
remote_bd_addr_id = k_bd_addr_id;
k_service_type = BTSDP_L2CAP_PROTOCOL_UUID;
k_service_channel = psm;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_sdp_psm;
key[3].length = 1;
key[3].key = &k_direction;
key[4].length = 1;
key[4].key = &k_bd_addr_oui;
key[5].length = 1;
key[5].key = &k_bd_addr_id;
key[6].length = 1;
key[6].key = &k_service_type;
key[7].length = 1;
key[7].key = &k_service_channel;
key[8].length = 1;
key[8].key = &k_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 == remote_bd_addr_oui &&
service_info->bd_addr_id == remote_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_L2CAP_PROTOCOL_UUID &&
service_info->channel == psm)
{
return service_info->uuid.bt_uuid;
}
return 0;
}
static int
dissect_comrej(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree)
{
guint16 reason;
reason = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_rej_reason, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
switch (reason) {
case 0x0000: /* Command not understood */
break;
case 0x0001: /* Signaling MTU exceeded */
proto_tree_add_item(tree, hf_btl2cap_sig_mtu, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
break;
case 0x0002: /* Invalid CID in requets */
proto_tree_add_item(tree, hf_btl2cap_scid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tree, hf_btl2cap_dcid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
break;
default:
break;
}
return offset;
}
static int
dissect_connrequest(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree, proto_tree *command_tree, gboolean is_ch_request,
bthci_acl_data_t *acl_data, btl2cap_data_t *l2cap_data)
{
guint16 scid;
guint16 psm;
const gchar *psm_str = "<NONE>";
psm = tvb_get_letohs(tvb, offset);
if (p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM ) == NULL) {
guint16 *value_data;
value_data = wmem_new(wmem_file_scope(), guint16);
*value_data = psm;
p_add_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM, value_data);
}
if (psm < BTL2CAP_DYNAMIC_PSM_START) {
proto_tree_add_item(command_tree, hf_btl2cap_psm, tvb, offset, 2, ENC_LITTLE_ENDIAN);
psm_str = val_to_str_const(psm, psm_vals, "Unknown PSM");
} else {
proto_item *item;
guint16 uuid;
item = proto_tree_add_item(command_tree, hf_btl2cap_psm_dynamic, tvb, offset, 2, ENC_LITTLE_ENDIAN);
uuid = get_service_uuid(pinfo, l2cap_data, psm, (pinfo->p2p_dir == P2P_DIR_RECV) ? TRUE : FALSE);
if (uuid) {
psm_str = val_to_str_ext_const(uuid, &bluetooth_uuid_vals_ext, "Unknown PSM");
proto_item_append_text(item, " (%s)", psm_str);
}
}
offset += 2;
scid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(command_tree, hf_btl2cap_scid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
col_append_fstr(pinfo->cinfo, COL_INFO, " (%s, SCID: 0x%04x)", psm_str, scid);
if (is_ch_request) {
proto_tree_add_item(command_tree, hf_btl2cap_controller, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
}
if (!pinfo->fd->visited) {
wmem_tree_key_t key[6];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
psm_data_t *psm_data;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = scid | ((pinfo->p2p_dir == P2P_DIR_RECV) ? 0x80000000 : 0x00000000);
k_frame_number = pinfo->num;
psm_data = wmem_new0(wmem_file_scope(), psm_data_t);
if (pinfo->p2p_dir == P2P_DIR_RECV) {
psm_data->local_cid = BTL2CAP_UNKNOWN_CID;
psm_data->remote_cid = scid | 0x80000000;
} else {
psm_data->local_cid = scid;
psm_data->remote_cid = BTL2CAP_UNKNOWN_CID;
}
psm_data->psm = psm;
psm_data->local_service = (pinfo->p2p_dir == P2P_DIR_RECV) ? TRUE : FALSE;
psm_data->in.start_fragments = wmem_tree_new(wmem_file_scope());
psm_data->out.start_fragments = wmem_tree_new(wmem_file_scope());
psm_data->interface_id = k_interface_id;
psm_data->adapter_id = k_adapter_id;
psm_data->chandle = k_chandle;
psm_data->connect_in_frame = pinfo->num;
psm_data->disconnect_in_frame = bluetooth_max_disconnect_in_frame;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
wmem_tree_insert32_array(cid_to_psm_table, key, psm_data);
}
if (l2cap_data) {
proto_item *sub_item;
guint32 bt_uuid = 0;
guint32 disconnect_in_frame = 0;
psm_data_t *psm_data;
wmem_tree_key_t key[6];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = scid | ((pinfo->p2p_dir == P2P_DIR_RECV) ? 0x80000000 : 0x00000000);
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
psm_data = (psm_data_t *)wmem_tree_lookup32_array_le(cid_to_psm_table, key);
if (psm_data &&
psm_data->interface_id == interface_id &&
psm_data->adapter_id == adapter_id &&
psm_data->chandle == chandle &&
psm_data->local_cid == k_cid)
{
bt_uuid = get_service_uuid(pinfo, l2cap_data, psm_data->psm, psm_data->local_service);
disconnect_in_frame = psm_data->disconnect_in_frame;
}
if (bt_uuid) {
sub_item = proto_tree_add_uint(tree, hf_btl2cap_service, tvb, 0, 0, bt_uuid);
proto_item_set_generated(sub_item);
}
if (disconnect_in_frame < bluetooth_max_disconnect_in_frame) {
sub_item = proto_tree_add_uint(tree, hf_btl2cap_disconnect_in_frame, tvb, 0, 0, disconnect_in_frame);
proto_item_set_generated(sub_item);
}
}
return offset;
}
static int
dissect_le_credit_based_connrequest(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree, proto_tree *command_tree, guint16 cid, guint8 cmd_ident,
bthci_acl_data_t *acl_data, btl2cap_data_t *l2cap_data)
{
proto_item *psm_item;
guint32 psm;
guint32 scid;
proto_tree_add_item_ret_uint(command_tree, hf_btl2cap_le_psm, tvb, offset, 2, ENC_LITTLE_ENDIAN, &psm);
if (psm < 0x80) {
psm_item = proto_tree_add_item(command_tree, hf_btl2cap_psm, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_item_set_generated(psm_item);
}
offset += 2;
proto_tree_add_item_ret_uint(command_tree, hf_btl2cap_scid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &scid);
offset += 2;
proto_tree_add_item(command_tree, hf_btl2cap_option_mtu, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(command_tree, hf_btl2cap_option_mps, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(command_tree, hf_btl2cap_initial_credits, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
if (!pinfo->fd->visited) {
wmem_tree_key_t key[7];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_cmd_ident;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
psm_data_t *psm_data;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = cid;
k_cmd_ident = cmd_ident;
k_frame_number = pinfo->num;
psm_data = wmem_new0(wmem_file_scope(), psm_data_t);
psm_data->local_cid = scid;
psm_data->remote_cid = BTL2CAP_UNKNOWN_CID;
psm_data->psm = psm;
psm_data->local_service = (pinfo->p2p_dir == P2P_DIR_RECV) ? TRUE : FALSE;
psm_data->in.mode = L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE;
psm_data->in.start_fragments = wmem_tree_new(wmem_file_scope());
psm_data->out.mode = L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE;
psm_data->out.start_fragments = wmem_tree_new(wmem_file_scope());
psm_data->interface_id = k_interface_id;
psm_data->adapter_id = k_adapter_id;
psm_data->chandle = k_chandle;
psm_data->connect_in_frame = pinfo->num;
psm_data->disconnect_in_frame = bluetooth_max_disconnect_in_frame;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_cmd_ident;
key[5].length = 1;
key[5].key = &k_frame_number;
key[6].length = 0;
key[6].key = NULL;
wmem_tree_insert32_array(cmd_ident_to_psm_table, key, psm_data);
k_cid = scid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
wmem_tree_insert32_array(cid_to_psm_table, key, psm_data);
}
if (l2cap_data) {
proto_item *sub_item;
guint32 bt_uuid = 0;
guint32 disconnect_in_frame = 0;
psm_data_t *psm_data;
wmem_tree_key_t key[6];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = scid;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
psm_data = (psm_data_t *)wmem_tree_lookup32_array_le(cid_to_psm_table, key);
if (psm_data &&
psm_data->interface_id == interface_id &&
psm_data->adapter_id == adapter_id &&
psm_data->chandle == chandle &&
psm_data->local_cid == k_cid)
{
bt_uuid = get_service_uuid(pinfo, l2cap_data, psm_data->psm, psm_data->local_service);
disconnect_in_frame = psm_data->disconnect_in_frame;
}
if (bt_uuid) {
sub_item = proto_tree_add_uint(tree, hf_btl2cap_service, tvb, 0, 0, bt_uuid);
proto_item_set_generated(sub_item);
}
if (disconnect_in_frame < bluetooth_max_disconnect_in_frame) {
sub_item = proto_tree_add_uint(tree, hf_btl2cap_disconnect_in_frame, tvb, 0, 0, disconnect_in_frame);
proto_item_set_generated(sub_item);
}
}
return offset;
}
static int
dissect_le_credit_based_connresponse(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree, guint16 cid, guint8 cmd_ident, bthci_acl_data_t *acl_data)
{
guint32 dcid;
proto_tree_add_item_ret_uint(tree, hf_btl2cap_dcid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &dcid);
offset += 2;
proto_tree_add_item(tree, hf_btl2cap_option_mtu, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tree, hf_btl2cap_option_mps, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tree, hf_btl2cap_initial_credits, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tree, hf_btl2cap_le_result, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
if (pinfo->fd->visited == 0) {
psm_data_t *psm_data;
wmem_tree_key_t key[7];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_cmd_ident;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = cid;
k_cmd_ident = cmd_ident;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_cmd_ident;
key[5].length = 1;
key[5].key = &k_frame_number;
key[6].length = 0;
key[6].key = NULL;
psm_data = (psm_data_t *)wmem_tree_lookup32_array_le(cmd_ident_to_psm_table, key);
if (psm_data &&
psm_data->interface_id == interface_id &&
psm_data->adapter_id == adapter_id &&
psm_data->chandle == chandle &&
psm_data->disconnect_in_frame > pinfo->num)
{
dcid |= 0x80000000;
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = dcid;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
if (pinfo->p2p_dir == P2P_DIR_RECV)
psm_data->remote_cid = dcid;
else
psm_data->local_cid = dcid;
wmem_tree_insert32_array(cid_to_psm_table, key, psm_data);
}
}
return offset;
}
static int
dissect_movechanrequest(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
guint16 icid;
guint8 ctrl_id;
icid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_icid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
ctrl_id = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_dcontroller, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
col_append_fstr(pinfo->cinfo, COL_INFO, " (ICID: 0x%04x, move to %s)", icid,
val_to_str_const(ctrl_id, ctrl_id_code_vals, "Unknown controller"));
return offset;
}
static int
dissect_options(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree, int length, config_data_t *config_data)
{
proto_item *ti_option;
proto_tree *ti_option_subtree;
guint8 option_type, option_length;
if (config_data) {
config_data->mode = L2CAP_BASIC_MODE;
config_data->txwindow = 0;
}
while (length > 0) {
option_type = tvb_get_guint8(tvb, offset);
option_length = tvb_get_guint8(tvb, offset + 1);
ti_option = proto_tree_add_none_format(tree,
hf_btl2cap_option, tvb,
offset, option_length + 2,
"Option: ");
ti_option_subtree = proto_item_add_subtree(ti_option, ett_btl2cap_option);
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_type, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_length, tvb, offset + 1, 1, ENC_LITTLE_ENDIAN);
offset += 2;
if (option_length != 0) {
switch (option_type) {
case 0x01: /* MTU */
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_mtu, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_item_append_text(ti_option, "MTU");
break;
case 0x02: /* Flush timeout */
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_flushTO, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_item_append_text(ti_option, "Flush Timeout");
break;
case 0x03: /* QOS */
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_flags, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_service_type, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_tokenrate, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_tokenbucketsize, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_peakbandwidth, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_latency, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_delayvariation, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_item_append_text(ti_option, "QOS");
break;
case 0x04: /* Retransmission and Flow Control*/
if (config_data)
{
config_data->mode = tvb_get_guint8(tvb, offset);
config_data->txwindow = tvb_get_guint8(tvb, offset + 1);
}
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_retransmissionmode, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_txwindow, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_maxtransmit, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_retransmittimeout, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_monitortimeout, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_mps, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_item_append_text(ti_option, "Retransmission and Flow Control");
break;
case 0x05: /* FCS */
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_fcs, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_item_append_text(ti_option, "FCS");
break;
case 0x06: /* Extended Flow Specification */
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_identifier, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_service_type, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_sdu_size, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_sdu_arrival_time, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_access_latency, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_flush_to_us, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_item_append_text(ti_option, "Extended Flow Specification");
break;
case 0x07: /* Extended Window Size */
proto_tree_add_item(ti_option_subtree, hf_btl2cap_option_window, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_item_append_text(ti_option, "Extended Window Size");
break;
default:
proto_item_append_text(ti_option, "unknown");
offset += option_length;
break;
}
}
length -= (option_length + 2);
}
return offset;
}
static int
dissect_configrequest(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree, guint16 length, bthci_acl_data_t *acl_data)
{
guint16 dcid;
dcid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_dcid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
col_append_fstr(pinfo->cinfo, COL_INFO, " (DCID: 0x%04x)", dcid);
proto_tree_add_item(tree, hf_btl2cap_flags_reserved, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(tree, hf_btl2cap_flags_continuation, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
{
psm_data_t *psm_data;
config_data_t *config_data;
wmem_tree_key_t key[6];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
guint32 cid;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
cid = dcid | ((pinfo->p2p_dir == P2P_DIR_RECV) ? 0x00000000 : 0x80000000);
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = cid;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
psm_data = (psm_data_t *)wmem_tree_lookup32_array_le(cid_to_psm_table, key);
if (psm_data &&
psm_data->interface_id == interface_id &&
psm_data->adapter_id == adapter_id &&
psm_data->chandle == chandle &&
((pinfo->p2p_dir == P2P_DIR_SENT && psm_data->remote_cid == cid) ||
(pinfo->p2p_dir == P2P_DIR_RECV && psm_data->local_cid == cid)) &&
psm_data->disconnect_in_frame > pinfo->num)
{
if (pinfo->p2p_dir == P2P_DIR_RECV)
config_data = &(psm_data->out);
else
config_data = &(psm_data->in);
} else {
config_data = NULL;
}
if (config_data != NULL) {
/* Reset config_data that might have been set by an earlier
* Configure Request that failed.
*/
config_data->mode = L2CAP_BASIC_MODE;
config_data->txwindow = 0;
}
if (tvb_reported_length_remaining(tvb, offset) > 0) {
offset = dissect_options(tvb, offset, pinfo, tree, length - 4, config_data);
}
}
return offset;
}
static int
dissect_inforequest(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
guint16 info_type;
info_type = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_info_type, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", val_to_str_const(info_type, info_type_vals, "Unknown type"));
return offset;
}
static int
dissect_inforesponse(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
guint16 info_type, result;
info_type = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_info_type, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
result = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_info_result, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
col_append_fstr(pinfo->cinfo, COL_INFO, " (%s, %s)",
val_to_str_const(info_type, info_type_vals, "Unknown type"),
val_to_str_const(result, info_result_vals, "Unknown result"));
if (tvb_reported_length_remaining(tvb, offset) > 0) {
proto_item *ti_features;
proto_tree *ti_features_subtree;
guint32 features;
switch (info_type) {
case 0x0001: /* Connectionless MTU */
proto_tree_add_item(tree, hf_btl2cap_info_mtu, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
break;
case 0x0002: /* Extended Features */
ti_features = proto_tree_add_none_format(tree,
hf_btl2cap_info_extfeatures, tvb,
offset, 4,
"Features: ");
ti_features_subtree = proto_item_add_subtree(ti_features, ett_btl2cap_extfeatures);
features = tvb_get_letohl(tvb, offset);
if (features & 0x1)
proto_item_append_text(ti_features, "FlowControl ");
if (features & 0x2)
proto_item_append_text(ti_features, "Retransmission ");
if (features & 0x4)
proto_item_append_text(ti_features, "BiDirQOS ");
if (features & 0x8)
proto_item_append_text(ti_features, "EnhRetransmission ");
if (features & 0x10)
proto_item_append_text(ti_features, "Streaming ");
if (features & 0x20)
proto_item_append_text(ti_features, "FCS ");
if (features & 0x40)
proto_item_append_text(ti_features, "FlowSpec ");
if (features & 0x80)
proto_item_append_text(ti_features, "FixedChan ");
if (features & 0x100)
proto_item_append_text(ti_features, "WindowSize ");
if (features & 0x200)
proto_item_append_text(ti_features, "Unicast ");
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_flowcontrol, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_retransmission, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_bidirqos, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_enh_retransmission, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_streaming, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_fcs, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_flow_spec, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_fixedchan, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_window, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_unicast, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
break;
case 0x0003: /* Fixed Channels Supported */
ti_features = proto_tree_add_none_format(tree,
hf_btl2cap_info_fixedchans, tvb,
offset, 8,
"Fixed Channels Supported:");
ti_features_subtree = proto_item_add_subtree(ti_features, ett_btl2cap_fixedchans);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_fixedchans_null, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_fixedchans_signal, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_fixedchans_connless, tvb, offset, 4, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_fixedchans_amp_man, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(ti_features_subtree, hf_btl2cap_info_fixedchans_amp_test, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
break;
default:
proto_tree_add_item(tree, hf_btl2cap_cmd_data, tvb, offset, -1, ENC_NA);
offset += tvb_reported_length_remaining(tvb, offset);
break;
}
}
return offset;
}
static int
dissect_configresponse(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree, guint16 length, bthci_acl_data_t *acl_data)
{
guint16 scid;
guint16 result;
scid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_scid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tree, hf_btl2cap_flags_reserved, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(tree, hf_btl2cap_flags_continuation, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
result = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_configuration_result, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
col_append_fstr(pinfo->cinfo, COL_INFO, " - %s (SCID: 0x%04x)",
val_to_str_const(result, configuration_result_vals, "Unknown"), scid);
if (tvb_reported_length_remaining(tvb, offset) > 0) {
psm_data_t *psm_data;
config_data_t *config_data;
wmem_tree_key_t key[6];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
guint32 cid;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
cid = scid | ((pinfo->p2p_dir == P2P_DIR_RECV) ? 0x00000000 : 0x80000000);
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = cid;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
psm_data = (psm_data_t *)wmem_tree_lookup32_array_le(cid_to_psm_table, key);
if (psm_data &&
psm_data->interface_id == interface_id &&
psm_data->adapter_id == adapter_id &&
psm_data->chandle == chandle &&
((pinfo->p2p_dir == P2P_DIR_SENT && psm_data->local_cid == cid) ||
(pinfo->p2p_dir == P2P_DIR_RECV && psm_data->remote_cid == cid)) &&
psm_data->disconnect_in_frame > pinfo->num)
{
if (pinfo->p2p_dir == P2P_DIR_RECV)
config_data = &(psm_data->out);
else
config_data = &(psm_data->in);
} else {
config_data = NULL;
}
offset = dissect_options(tvb, offset, pinfo, tree, length - 6, config_data);
}
return offset;
}
static int
dissect_connresponse(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree, bthci_acl_data_t *acl_data)
{
guint16 scid, dcid, result;
dcid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_dcid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
scid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_scid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
result = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_result, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tree, hf_btl2cap_status, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
if (result == 0) {
col_append_fstr(pinfo->cinfo, COL_INFO, " - Success (SCID: 0x%04x, DCID: 0x%04x)", scid, dcid);
}
else {
col_append_fstr(pinfo->cinfo, COL_INFO, " - %s (SCID: 0x%04x)",
val_to_str_const(result, result_vals, "Unknown"), scid);
}
if (pinfo->fd->visited == 0) {
psm_data_t *psm_data;
wmem_tree_key_t key[6];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
guint32 cid;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
cid = scid | ((pinfo->p2p_dir == P2P_DIR_RECV) ? 0x00000000 : 0x80000000);
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = cid;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
psm_data = (psm_data_t *)wmem_tree_lookup32_array_le(cid_to_psm_table, key);
if (psm_data &&
psm_data->interface_id == interface_id &&
psm_data->adapter_id == adapter_id &&
psm_data->chandle == chandle &&
((pinfo->p2p_dir == P2P_DIR_SENT && psm_data->remote_cid == cid) ||
(pinfo->p2p_dir == P2P_DIR_RECV && psm_data->local_cid == cid)) &&
psm_data->disconnect_in_frame > pinfo->num)
{
cid = dcid | ((pinfo->p2p_dir == P2P_DIR_RECV) ? 0x80000000 : 0x00000000);
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = cid;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
if (pinfo->p2p_dir == P2P_DIR_RECV)
psm_data->remote_cid = cid;
else
psm_data->local_cid = cid;
wmem_tree_insert32_array(cid_to_psm_table, key, psm_data);
}
}
return offset;
}
static int
dissect_chanresponse(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, bthci_acl_data_t *acl_data)
{
return dissect_connresponse(tvb, offset, pinfo, tree, acl_data);
}
static int
dissect_movechanresponse(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
guint16 icid, result;
icid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_icid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
result = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_move_result, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
col_append_fstr(pinfo->cinfo, COL_INFO, " (ICID: 0x%04x, %s)", icid,
val_to_str_const(result, move_result_vals, "Unknown result"));
return offset;
}
static int
dissect_movechanconfirmation(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
guint16 icid, result;
icid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_icid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
result = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_move_confirmation_result, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
col_append_fstr(pinfo->cinfo, COL_INFO, " (ICID: 0x%04x, %s)", icid,
val_to_str_const(result, move_result_confirmation_vals, "Unknown result"));
return offset;
}
static int
dissect_movechanconfirmationresponse(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
guint16 icid;
icid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_icid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
col_append_fstr(pinfo->cinfo, COL_INFO, " (ICID: 0x%04x)", icid);
return offset;
}
static int
dissect_connparamrequest(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
proto_item *item;
guint16 max_interval, slave_latency;
item = proto_tree_add_item(tree, hf_btl2cap_min_interval, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_item_append_text(item, " (%g msec)", tvb_get_letohs(tvb, offset) * 1.25);
offset += 2;
item = proto_tree_add_item(tree, hf_btl2cap_max_interval, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_item_append_text(item, " (%g msec)", tvb_get_letohs(tvb, offset) * 1.25);
max_interval = tvb_get_letohs(tvb, offset);
offset += 2;
item = proto_tree_add_item(tree, hf_btl2cap_slave_latency, tvb, offset, 2, ENC_LITTLE_ENDIAN);
slave_latency = tvb_get_letohs(tvb, offset);
if(slave_latency >= 500 || max_interval == 0 ||
slave_latency > 10.0 * tvb_get_letohs(tvb, offset + 2) / (max_interval *1.25))
expert_add_info(pinfo, item, &ei_btl2cap_parameter_mismatch);
offset += 2;
item = proto_tree_add_item(tree, hf_btl2cap_timeout_multiplier, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_item_append_text(item, " (%g sec)", tvb_get_letohs(tvb, offset) * 0.01);
offset += 2;
return offset;
}
static int
dissect_connparamresponse(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
guint16 result;
result = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_btl2cap_conn_param_result, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)",
val_to_str_const(result, conn_param_result_vals, "Unknown result"));
return offset;
}
static int
dissect_disconnrequestresponse(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree, proto_tree *command_tree, bthci_acl_data_t *acl_data, btl2cap_data_t *l2cap_data,
gboolean is_request)
{
guint16 scid;
guint16 dcid;
guint psm = 0;
const gchar *service_name = "Unknown";
dcid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(command_tree, hf_btl2cap_dcid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
scid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(command_tree, hf_btl2cap_scid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
if (!pinfo->fd->visited) {
psm_data_t *psm_data;
wmem_tree_key_t key[6];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
guint32 key_scid;
guint32 key_dcid;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
if ((is_request && pinfo->p2p_dir == P2P_DIR_SENT) ||
(!is_request && pinfo->p2p_dir == P2P_DIR_RECV)) {
key_dcid = dcid | 0x80000000;
key_scid = scid;
} else {
key_dcid = scid | 0x80000000;
key_scid = dcid;
}
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = key_dcid;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
psm_data = (psm_data_t *)wmem_tree_lookup32_array_le(cid_to_psm_table, key);
if (psm_data &&
psm_data->interface_id == interface_id &&
psm_data->adapter_id == adapter_id &&
psm_data->chandle == chandle &&
psm_data->remote_cid == key_dcid &&
psm_data->disconnect_in_frame == bluetooth_max_disconnect_in_frame)
{
psm_data->disconnect_in_frame = pinfo->num;
}
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = key_scid;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
psm_data = (psm_data_t *)wmem_tree_lookup32_array_le(cid_to_psm_table, key);
if (psm_data &&
psm_data->interface_id == interface_id &&
psm_data->adapter_id == adapter_id &&
psm_data->chandle == chandle &&
psm_data->local_cid == key_scid &&
psm_data->disconnect_in_frame == bluetooth_max_disconnect_in_frame)
{
psm_data->disconnect_in_frame = pinfo->num;
}
}
if (l2cap_data) {
proto_item *sub_item;
guint32 bt_uuid = 0;
guint32 connect_in_frame = 0;
psm_data_t *psm_data;
wmem_tree_key_t key[6];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
guint32 key_dcid;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
if ((is_request && pinfo->p2p_dir == P2P_DIR_SENT) ||
(!is_request && pinfo->p2p_dir == P2P_DIR_RECV)) {
key_dcid = dcid | 0x80000000;
} else {
key_dcid = scid | 0x80000000;
}
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = key_dcid;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
psm_data = (psm_data_t *)wmem_tree_lookup32_array_le(cid_to_psm_table, key);
if (psm_data &&
psm_data->interface_id == interface_id &&
psm_data->adapter_id == adapter_id &&
psm_data->chandle == chandle &&
psm_data->remote_cid == key_dcid)
{
psm = psm_data->psm;
bt_uuid = get_service_uuid(pinfo, l2cap_data, psm_data->psm, psm_data->local_service);
connect_in_frame = psm_data->connect_in_frame;
}
if (bt_uuid) {
bluetooth_uuid_t uuid;
uuid.size = 2;
uuid.bt_uuid = bt_uuid;
uuid.data[0] = bt_uuid >> 8;
uuid.data[1] = bt_uuid & 0xFF;
service_name = val_to_str_ext_const(uuid.bt_uuid, &bluetooth_uuid_vals_ext, "Unknown");
}
if (strcmp(service_name, "Unknown") == 0) {
service_name = val_to_str_const(psm, psm_vals, "Unknown");
}
if (psm > 0) {
sub_item = proto_tree_add_uint(tree, hf_btl2cap_psm, tvb, offset, 0, psm);
proto_item_set_generated(sub_item);
}
if (bt_uuid) {
sub_item = proto_tree_add_uint(tree, hf_btl2cap_service, tvb, 0, 0, bt_uuid);
proto_item_set_generated(sub_item);
}
if (connect_in_frame > 0) {
sub_item = proto_tree_add_uint(tree, hf_btl2cap_connect_in_frame, tvb, 0, 0, connect_in_frame);
proto_item_set_generated(sub_item);
}
}
if (psm > 0)
col_append_fstr(pinfo->cinfo, COL_INFO, " (SCID: 0x%04x, DCID: 0x%04x, PSM: 0x%04x, Service: %s)", scid, dcid, psm, service_name);
else
col_append_fstr(pinfo->cinfo, COL_INFO, " (SCID: 0x%04x, DCID: 0x%04x, PSM: Unknown, Service: %s)", scid, dcid, service_name);
return offset;
}
static int
dissect_b_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_tree *btl2cap_tree, guint16 cid, guint16 psm,
gboolean is_local_psm, guint16 length, int offset, btl2cap_data_t *l2cap_data)
{
tvbuff_t *next_tvb;
next_tvb = tvb_new_subset_length_caplen(tvb, offset, tvb_captured_length_remaining(tvb, offset), length);
col_append_str(pinfo->cinfo, COL_INFO, "Connection oriented channel");
if (psm) {
proto_item *psm_item;
guint16 bt_uuid;
bluetooth_uuid_t uuid;
if (p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM ) == NULL) {
guint16 *value_data;
value_data = wmem_new(wmem_file_scope(), guint16);
*value_data = psm;
p_add_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM, value_data);
}
bt_uuid = get_service_uuid(pinfo, l2cap_data, psm, is_local_psm);
uuid.size = 2;
uuid.bt_uuid = bt_uuid;
uuid.data[0] = bt_uuid >> 8;
uuid.data[1] = bt_uuid & 0xFF;
if (bt_uuid && p_get_proto_data(pinfo->pool, pinfo, proto_bluetooth, PROTO_DATA_BLUETOOTH_SERVICE_UUID) == NULL) {
gchar *value_data;
value_data = wmem_strdup(wmem_file_scope(), print_numeric_bluetooth_uuid(pinfo->pool, &uuid));
p_add_proto_data(pinfo->pool, pinfo, proto_bluetooth, PROTO_DATA_BLUETOOTH_SERVICE_UUID, value_data);
}
if (psm < BTL2CAP_DYNAMIC_PSM_START) {
psm_item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_psm, tvb, offset, 0, psm);
}
else {
psm_item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_psm_dynamic, tvb, offset, 0, psm);
if (uuid.bt_uuid)
proto_item_append_text(psm_item, ": %s",
val_to_str_ext_const(uuid.bt_uuid, &bluetooth_uuid_vals_ext, "Unknown service"));
}
proto_item_set_generated(psm_item);
/* call next dissector */
if (!dissector_try_uint_new(l2cap_cid_dissector_table, (guint32) cid, next_tvb, pinfo, tree, TRUE, l2cap_data)) {
if (!dissector_try_uint_new(l2cap_psm_dissector_table, (guint32) psm, next_tvb, pinfo, tree, TRUE, l2cap_data)) {
/* not a known fixed PSM, try to find a registered service to a dynamic PSM */
if (!dissector_try_string(bluetooth_uuid_table, print_numeric_bluetooth_uuid(pinfo->pool, &uuid), next_tvb, pinfo, tree, l2cap_data)) {
/* unknown protocol. declare as data */
proto_tree_add_item(btl2cap_tree, hf_btl2cap_payload, tvb, offset, length, ENC_NA);
}
}
}
offset = tvb_captured_length(tvb);
} else {
if (!dissector_try_uint_new(l2cap_cid_dissector_table, (guint32) cid, next_tvb, pinfo, tree, TRUE, l2cap_data))
proto_tree_add_item(btl2cap_tree, hf_btl2cap_payload, tvb, offset, length, ENC_NA);
offset = tvb_captured_length(tvb);
}
return offset;
}
/* An LE-frame is a PDU used in LE Credit Based Flow Control Mode. It
* contains an SDU segment and additional protocol information, encapsulated
* by a Basic L2CAP header.
*/
static int
dissect_le_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_tree *btl2cap_tree, guint16 cid, guint16 psm, gboolean is_local_psm,
guint16 length, int offset, config_data_t *config_data, btl2cap_data_t *l2cap_data,
gboolean is_retransmit)
{
tvbuff_t *new_tvb = NULL;
bluetooth_uuid_t uuid;
btl2cap_frame_data_t *btl2cap_frame_data = NULL;
fragment_head *frag_btl2cap_le_sdu = NULL;
if ((!pinfo->fd->visited) && (config_data) && !is_retransmit) {
btl2cap_frame_data = wmem_new0(wmem_file_scope(), btl2cap_frame_data_t);
if (config_data->segmentation_started == 1) {
config_data->segment_len_rem = config_data->segment_len_rem - length;
if (config_data->segment_len_rem > 0) {
btl2cap_frame_data->more_fragments = 1;
} else {
btl2cap_frame_data->more_fragments = 0;
config_data->segmentation_started = 0;
config_data->segment_len_rem = 0;
}
} else {
/* First Frame in this SDU, SDU length is present */
guint16 sdu_length;
sdu_length = tvb_get_letohs(tvb, offset);
btl2cap_frame_data->first_fragment = 1;
if (sdu_length == length - 2) {
/* Complete SDU no segmentation */
btl2cap_frame_data->more_fragments = 0;
config_data->segmentation_started = 0;
config_data->segment_len_rem = 0;
} else {
btl2cap_frame_data->more_fragments = 1;
config_data->segmentation_started = 1;
config_data->segment_len_rem = sdu_length - (length - 2);
}
}
p_add_proto_data(wmem_file_scope(), pinfo, proto_btl2cap, pinfo->curr_layer_num, btl2cap_frame_data);
} else {
/* Not the first pass */
btl2cap_frame_data = (btl2cap_frame_data_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_btl2cap, pinfo->curr_layer_num);
}
col_append_str(pinfo->cinfo, COL_INFO, "Connection oriented channel, LE Information frame");
if (!btl2cap_frame_data) {
/* Without frame data we do not have enough information to dissect the packet */
proto_tree_add_item(btl2cap_tree, hf_btl2cap_payload, tvb, offset, length, ENC_NA);
return tvb_captured_length(tvb);
}
if (psm) {
proto_item *psm_item;
guint16 bt_uuid;
if (p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM) == NULL) {
guint16 *value_data;
value_data = wmem_new(wmem_file_scope(), guint16);
*value_data = psm;
p_add_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM, value_data);
}
bt_uuid = get_service_uuid(pinfo, l2cap_data, psm, is_local_psm);
uuid.size = 2;
uuid.bt_uuid = bt_uuid;
uuid.data[0] = bt_uuid >> 8;
uuid.data[1] = bt_uuid & 0xFF;
if (bt_uuid && p_get_proto_data(pinfo->pool, pinfo, proto_bluetooth, PROTO_DATA_BLUETOOTH_SERVICE_UUID) == NULL) {
gchar *value_data;
value_data = wmem_strdup(wmem_file_scope(), print_numeric_bluetooth_uuid(pinfo->pool, &uuid));
p_add_proto_data(pinfo->pool, pinfo, proto_bluetooth, PROTO_DATA_BLUETOOTH_SERVICE_UUID, value_data);
}
if (psm < BTL2CAP_DYNAMIC_PSM_START) {
psm_item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_psm, tvb, offset, 0, psm);
} else {
psm_item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_psm_dynamic, tvb, offset, 0, psm);
if (uuid.bt_uuid)
proto_item_append_text(psm_item, ": %s",
val_to_str_ext_const(uuid.bt_uuid, &bluetooth_uuid_vals_ext, "Unknown service"));
}
proto_item_set_generated(psm_item);
}/*psm*/
if (btl2cap_frame_data->first_fragment) {
proto_tree_add_item(btl2cap_tree, hf_btl2cap_le_sdu_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
length = length - 2;
}
pinfo->fragmented = TRUE;
frag_btl2cap_le_sdu = fragment_add_seq_next(&btl2cap_le_sdu_reassembly_table,
tvb, offset,
pinfo,
cid, /* guint32 ID for fragments belonging together */
NULL, /* data* */
length, /* Fragment length */
btl2cap_frame_data->more_fragments); /* More fragments */
new_tvb = process_reassembled_data(tvb, offset, pinfo,
"Reassembled SDU",
frag_btl2cap_le_sdu,
&btl2cap_le_sdu_frag_items,
NULL,
btl2cap_tree);
if (new_tvb) {
if (psm) {
if (!dissector_try_uint_new(l2cap_cid_dissector_table, (guint32)cid, new_tvb, pinfo, tree, TRUE, l2cap_data)) {
if (!dissector_try_uint_new(l2cap_psm_dissector_table, (guint32)psm, new_tvb, pinfo, tree, TRUE, l2cap_data)) {
/* not a known fixed PSM, try to find a registered service to a dynamic PSM */
if (!dissector_try_string(bluetooth_uuid_table, print_numeric_bluetooth_uuid(pinfo->pool, &uuid), new_tvb, pinfo, tree, l2cap_data)) {
/* unknown protocol. declare as data */
proto_tree_add_item(btl2cap_tree, hf_btl2cap_payload, tvb, offset, length, ENC_NA);
}
}
}
} else {
/* call next dissector */
if (!dissector_try_uint_new(l2cap_cid_dissector_table, (guint32)cid, new_tvb, pinfo, tree, TRUE, l2cap_data)) {
proto_tree_add_item(btl2cap_tree, hf_btl2cap_payload, tvb, offset, length, ENC_NA);
}
}
return tvb_captured_length(tvb);
}
col_set_str(pinfo->cinfo, COL_INFO, "L2CAP LE Fragment");
proto_tree_add_item(btl2cap_tree, hf_btl2cap_payload, tvb, offset, length, ENC_NA);
return tvb_captured_length(tvb);;
}
static int
dissect_i_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_tree *btl2cap_tree, psm_data_t *psm_data, guint16 length,
gint offset, config_data_t *config_data, btl2cap_data_t *l2cap_data)
{
tvbuff_t *next_tvb = NULL;
guint16 control, segment;
guint16 sdulen;
proto_item* ti_control;
proto_tree* ti_control_subtree;
sdu_reassembly_t *mfp = NULL;
guint16 psm = (psm_data ? psm_data->psm : 0);
control = tvb_get_letohs(tvb, offset);
segment = (control & 0xC000) >> 14;
switch (segment) {
case 0:
col_append_str(pinfo->cinfo, COL_INFO, "[I] Unsegmented SDU");
break;
case 1:
col_append_str(pinfo->cinfo, COL_INFO, "[I] Start SDU");
break;
case 2:
col_append_str(pinfo->cinfo, COL_INFO, "[I] End SDU");
break;
case 3:
col_append_str(pinfo->cinfo, COL_INFO, "[I] Continuation SDU");
break;
}
ti_control = proto_tree_add_none_format(btl2cap_tree, hf_btl2cap_control, tvb,
offset, 2, "Control: %s reqseq:%d r:%d txseq:%d",
val_to_str_const((control & 0xC000) >> 14, control_sar_vals, "unknown"),
(control & 0x3F00) >> 8,
(control & 0x0080) >> 7,
(control & 0x007E) >> 1);
ti_control_subtree = proto_item_add_subtree(ti_control, ett_btl2cap_control);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_sar, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_reqseq, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_retransmissiondisable, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_txseq, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_type, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
/*Segmented frames with SAR = start have an extra SDU length header field*/
if (segment == 0x01) {
proto_item *pi;
sdulen = tvb_get_letohs(tvb, offset);
pi = proto_tree_add_item(btl2cap_tree, hf_btl2cap_sdulength, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
/* Detect malformed data */
if (length <= 6) {
expert_add_info_format(pinfo, pi, &ei_btl2cap_sdulength_bad,
"SDU length too short: %u", length);
THROW(ReportedBoundsError);
}
length -= 6; /*Control, SDUlength, FCS*/
if (sdulen < length) {
sdulen = length;
expert_add_info_format(pinfo, pi, &ei_btl2cap_sdulength_bad,
"SDU length less than length of first packet (%u < %u)", sdulen, length);
}
if (!pinfo->fd->visited) {
mfp = wmem_new(wmem_file_scope(), sdu_reassembly_t);
mfp->first_frame = pinfo->num;
mfp->last_frame = 0;
mfp->tot_len = sdulen;
mfp->reassembled = (guint8 *) wmem_alloc(wmem_file_scope(), sdulen);
tvb_memcpy(tvb, mfp->reassembled, offset, sdulen);
mfp->cur_off = sdulen;
wmem_tree_insert32(config_data->start_fragments, pinfo->num, mfp);
} else {
mfp = (sdu_reassembly_t *)wmem_tree_lookup32(config_data->start_fragments, pinfo->num);
}
if (mfp != NULL && mfp->last_frame) {
proto_item *item;
item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_reassembled_in, tvb, 0, 0, mfp->last_frame);
proto_item_set_generated(item);
col_append_frame_number(pinfo, COL_INFO, "[Reassembled in #%u] ", mfp->last_frame);
}
} else {
if (length <= 4) {
expert_add_info_format(pinfo, btl2cap_tree, &ei_btl2cap_length_bad,
"Control / FCS length too short: %u", length);
THROW(ReportedBoundsError);
}
length -= 4; /*Control, FCS*/
}
if (segment == 0x02 || segment == 0x03) {
mfp = (sdu_reassembly_t *)wmem_tree_lookup32_le(config_data->start_fragments, pinfo->num);
if (!pinfo->fd->visited) {
if (mfp != NULL && !mfp->last_frame && (mfp->tot_len>=mfp->cur_off + length)) {
tvb_memcpy(tvb, mfp->reassembled + mfp->cur_off, offset, length);
mfp->cur_off += length;
if (segment == 0x02) {
mfp->last_frame = pinfo->num;
}
}
}
if (mfp) {
proto_item *item;
item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_continuation_to, tvb, 0, 0, mfp->first_frame);
proto_item_set_generated(item);
col_append_fstr(pinfo->cinfo, COL_INFO, "[Continuation to #%u] ", mfp->first_frame);
}
}
if (segment == 0x02 && mfp != NULL && mfp->last_frame == pinfo->num) {
next_tvb = tvb_new_child_real_data(tvb, (guint8 *)mfp->reassembled, mfp->tot_len, mfp->tot_len);
add_new_data_source(pinfo, next_tvb, "Reassembled L2CAP");
}
/*pass up to higher layer if we have a complete packet*/
if (segment == 0x00) {
next_tvb = tvb_new_subset_length_caplen(tvb, offset, tvb_captured_length_remaining(tvb, offset) - 2, length);
}
if (next_tvb) {
if (psm) {
proto_item *psm_item;
guint16 bt_uuid;
bluetooth_uuid_t uuid;
if (p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM ) == NULL) {
guint16 *value_data;
value_data = wmem_new(wmem_file_scope(), guint16);
*value_data = psm;
p_add_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM, value_data);
}
bt_uuid = get_service_uuid(pinfo, l2cap_data, psm, psm_data->local_service);
uuid.size = 2;
uuid.bt_uuid = bt_uuid;
uuid.data[0] = bt_uuid >> 8;
uuid.data[1] = bt_uuid & 0xFF;
if (bt_uuid && p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BLUETOOTH_SERVICE_UUID) == NULL) {
gchar *value_data;
value_data = wmem_strdup(wmem_file_scope(), print_numeric_bluetooth_uuid(pinfo->pool, &uuid));
p_add_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BLUETOOTH_SERVICE_UUID, value_data);
}
if (psm < BTL2CAP_DYNAMIC_PSM_START) {
psm_item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_psm, tvb, offset, 0, psm);
} else {
psm_item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_psm_dynamic, tvb, offset, 0, psm);
if (uuid.bt_uuid)
proto_item_append_text(psm_item, " (%s)",
val_to_str_ext_const(uuid.bt_uuid, &bluetooth_uuid_vals_ext, "Unknown service"));
}
proto_item_set_generated(psm_item);
/* call next dissector */
if (!dissector_try_uint_new(l2cap_psm_dissector_table, (guint32) psm, next_tvb, pinfo, tree, TRUE, l2cap_data)) {
/* not a known fixed PSM, try to find a registered service to a dynamic PSM */
if (!dissector_try_string(bluetooth_uuid_table, print_numeric_bluetooth_uuid(pinfo->pool, &uuid), next_tvb, pinfo, tree, l2cap_data)) {
/* unknown protocol. declare as data */
proto_tree_add_item(btl2cap_tree, hf_btl2cap_payload, next_tvb, 0, tvb_reported_length(next_tvb), ENC_NA);
}
}
}
else {
proto_tree_add_item(btl2cap_tree, hf_btl2cap_payload, next_tvb, 0, tvb_reported_length(next_tvb), ENC_NA);
}
}
offset += tvb_reported_length_remaining(tvb, offset) - 2;
proto_tree_add_item(btl2cap_tree, hf_btl2cap_fcs, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
return offset;
}
static int
dissect_s_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, proto_tree *btl2cap_tree,
guint16 psm _U_, guint16 length _U_, int offset, config_data_t *config_data _U_)
{
proto_item *ti_control;
proto_tree *ti_control_subtree;
guint16 control;
control = tvb_get_letohs(tvb, offset);
switch ((control & 0x000C) >> 2) {
case 0:
col_append_str(pinfo->cinfo, COL_INFO, "[S] Receiver Ready");
break;
case 1:
col_append_str(pinfo->cinfo, COL_INFO, "[S] Reject");
break;
default:
col_append_str(pinfo->cinfo, COL_INFO, "[S] Unknown supervisory frame");
break;
}
ti_control = proto_tree_add_none_format(btl2cap_tree, hf_btl2cap_control, tvb,
offset, 2, "Control: %s reqseq:%d r:%d",
val_to_str_const((control & 0x000C) >> 2, control_supervisory_vals, "unknown"),
(control & 0x3F00) >> 8,
(control & 0x0080) >> 7);
ti_control_subtree = proto_item_add_subtree(ti_control, ett_btl2cap_control);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_reqseq, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_retransmissiondisable, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_supervisory, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_type, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(btl2cap_tree, hf_btl2cap_fcs, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
return offset;
}
static gint
dissect_btl2cap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
gint offset = 0;
proto_item *ti;
proto_tree *btl2cap_tree;
proto_item *length_item;
guint16 length;
guint16 cid;
guint16 psm;
guint16 control;
tvbuff_t *next_tvb = NULL;
psm_data_t *psm_data;
bthci_acl_data_t *acl_data;
btl2cap_data_t *l2cap_data;
gboolean dir_in_col = TRUE;
acl_data = (bthci_acl_data_t *) data;
if ((acl_data) && (acl_data->is_btle)) {
dir_in_col = FALSE;
}
ti = proto_tree_add_item(tree, proto_btl2cap, tvb, offset, -1, ENC_NA);
btl2cap_tree = proto_item_add_subtree(ti, ett_btl2cap);
col_set_str(pinfo->cinfo, COL_PROTOCOL, "L2CAP");
if (dir_in_col) {
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;
}
} else {
col_clear(pinfo->cinfo, COL_INFO);
}
length = tvb_get_letohs(tvb, offset);
length_item = proto_tree_add_item(btl2cap_tree, hf_btl2cap_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
if (tvb_captured_length_remaining(tvb, offset) < length) {
expert_add_info(pinfo, length_item, &ei_btl2cap_length_bad);
/* Try to dissect as more as possible */
length = tvb_captured_length_remaining(tvb, offset) - 4;
}
offset += 2;
cid = tvb_get_letohs(tvb, offset);
proto_tree_add_item(btl2cap_tree, hf_btl2cap_cid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
if (p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_CID ) == NULL) {
guint16 *value_data;
value_data = wmem_new(wmem_file_scope(), guint16);
*value_data = cid;
p_add_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_CID, value_data);
}
offset += 2;
l2cap_data = wmem_new(pinfo->pool, btl2cap_data_t);
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
l2cap_data->interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
l2cap_data->interface_id = HCI_INTERFACE_DEFAULT;
if (acl_data) {
l2cap_data->adapter_id = acl_data->adapter_id;
l2cap_data->adapter_disconnect_in_frame = acl_data->adapter_disconnect_in_frame;
l2cap_data->chandle = acl_data->chandle;
l2cap_data->hci_disconnect_in_frame = acl_data->disconnect_in_frame;
l2cap_data->remote_bd_addr_oui = acl_data->remote_bd_addr_oui;
l2cap_data->remote_bd_addr_id = acl_data->remote_bd_addr_id;
} else {
l2cap_data->adapter_id = HCI_ADAPTER_DEFAULT;
l2cap_data->adapter_disconnect_in_frame = &bluetooth_max_disconnect_in_frame;
l2cap_data->chandle = 0;
l2cap_data->hci_disconnect_in_frame = &bluetooth_max_disconnect_in_frame;
l2cap_data->remote_bd_addr_oui = 0;
l2cap_data->remote_bd_addr_id = 0;
}
l2cap_data->disconnect_in_frame = &bluetooth_max_disconnect_in_frame;
l2cap_data->cid = cid;
l2cap_data->local_cid = BTL2CAP_UNKNOWN_CID;
l2cap_data->remote_cid = BTL2CAP_UNKNOWN_CID;
l2cap_data->is_local_psm = FALSE;
l2cap_data->psm = 0;
if (cid == BTL2CAP_FIXED_CID_SIGNAL || cid == BTL2CAP_FIXED_CID_LE_SIGNAL) {
/* This is a command packet*/
while (offset < length + 4) {
proto_item *ti_command;
proto_tree *btl2cap_cmd_tree;
guint8 cmd_code;
guint8 cmd_ident;
guint16 cmd_length;
const gchar *cmd_str;
ti_command = proto_tree_add_none_format(btl2cap_tree,
hf_btl2cap_command, tvb,
offset, length,
"Command: ");
btl2cap_cmd_tree = proto_item_add_subtree(ti_command, ett_btl2cap_cmd);
cmd_code = tvb_get_guint8(tvb, offset);
proto_tree_add_item(btl2cap_cmd_tree, hf_btl2cap_cmd_code, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
cmd_ident = tvb_get_guint8(tvb, offset);
proto_tree_add_item(btl2cap_cmd_tree, hf_btl2cap_cmd_ident, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
cmd_length = tvb_get_letohs(tvb, offset);
proto_tree_add_item(btl2cap_cmd_tree, hf_btl2cap_cmd_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_item_set_len(ti_command, cmd_length + 4);
offset += 2;
cmd_str = val_to_str_const(cmd_code, command_code_vals, "Unknown command");
proto_item_append_text(ti_command, "%s", cmd_str);
col_append_str(pinfo->cinfo, COL_INFO, cmd_str);
switch (cmd_code) {
case 0x01: /* Command Reject */
offset = dissect_comrej(tvb, offset, pinfo, btl2cap_cmd_tree);
break;
case 0x02: /* Connection Request */
offset = dissect_connrequest(tvb, offset, pinfo, btl2cap_tree, btl2cap_cmd_tree, FALSE, acl_data, l2cap_data);
break;
case 0x03: /* Connection Response */
offset = dissect_connresponse(tvb, offset, pinfo, btl2cap_cmd_tree, acl_data);
break;
case 0x04: /* Configure Request */
offset = dissect_configrequest(tvb, offset, pinfo, btl2cap_cmd_tree, cmd_length, acl_data);
break;
case 0x05: /* Configure Response */
offset = dissect_configresponse(tvb, offset, pinfo, btl2cap_cmd_tree, cmd_length, acl_data);
break;
case 0x06: /* Disconnect Request */
offset = dissect_disconnrequestresponse(tvb, offset, pinfo, btl2cap_tree, btl2cap_cmd_tree, acl_data, l2cap_data, TRUE);
break;
case 0x07: /* Disconnect Response */
offset = dissect_disconnrequestresponse(tvb, offset, pinfo, btl2cap_tree, btl2cap_cmd_tree, acl_data, l2cap_data, FALSE);
break;
case 0x08: /* Echo Request */
proto_tree_add_item(btl2cap_cmd_tree, hf_btl2cap_data, tvb, offset, -1, ENC_NA);
offset = tvb_reported_length(tvb);
break;
case 0x09: /* Echo Response */
proto_tree_add_item(btl2cap_cmd_tree, hf_btl2cap_data, tvb, offset, -1, ENC_NA);
offset = tvb_reported_length(tvb);
break;
case 0x0a: /* Information Request */
offset = dissect_inforequest(tvb, offset, pinfo, btl2cap_cmd_tree);
break;
case 0x0b: /* Information Response */
offset = dissect_inforesponse(tvb, offset, pinfo, btl2cap_cmd_tree);
break;
case 0x0c: /* Create Channel Request */
offset = dissect_connrequest(tvb, offset, pinfo, btl2cap_tree, btl2cap_cmd_tree, TRUE, acl_data, l2cap_data);
break;
case 0x0d: /* Create Channel Response */
offset = dissect_chanresponse(tvb, offset, pinfo, btl2cap_cmd_tree, acl_data);
break;
case 0x0e: /* Move Channel Request */
offset = dissect_movechanrequest(tvb, offset, pinfo, btl2cap_cmd_tree);
break;
case 0x0f: /* Move Channel Response */
offset = dissect_movechanresponse(tvb, offset, pinfo, btl2cap_cmd_tree);
break;
case 0x10: /* Move Channel Confirmation */
offset = dissect_movechanconfirmation(tvb, offset, pinfo, btl2cap_cmd_tree);
break;
case 0x11: /* Move Channel Confirmation Response */
offset = dissect_movechanconfirmationresponse(tvb, offset, pinfo, btl2cap_cmd_tree);
break;
case 0x12: /* Connection Parameter Request */
offset = dissect_connparamrequest(tvb, offset, pinfo, btl2cap_cmd_tree);
break;
case 0x13: /* Connection Parameter Response */
offset = dissect_connparamresponse(tvb, offset, pinfo, btl2cap_cmd_tree);
break;
case 0x14: /* LE Credit Based Connection Request */
offset = dissect_le_credit_based_connrequest(tvb, offset, pinfo, btl2cap_tree, btl2cap_cmd_tree, cid, cmd_ident, acl_data, l2cap_data);
col_append_fstr(pinfo->cinfo, COL_INFO, " (CID: %04x, Initial Credits: %u)",
tvb_get_letohs(tvb, offset - 8), tvb_get_letohs(tvb, offset - 2));
break;
case 0x15: /* LE Credit Based Connection Response */
offset = dissect_le_credit_based_connresponse(tvb, offset, pinfo, btl2cap_cmd_tree, cid, cmd_ident, acl_data);
col_append_fstr(pinfo->cinfo, COL_INFO, " (CID: %04x, Initial Credits: %u)",
tvb_get_letohs(tvb, offset - 10), tvb_get_letohs(tvb, offset - 4));
break;
case 0x16: /* LE Flow Control Credit */
proto_tree_add_item(btl2cap_cmd_tree, hf_btl2cap_cid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(btl2cap_cmd_tree, hf_btl2cap_credits, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
col_append_fstr(pinfo->cinfo, COL_INFO, " (CID: %04x, Credits: %u)",
tvb_get_letohs(tvb, offset - 4), tvb_get_letohs(tvb, offset - 2));
break;
default:
proto_tree_add_expert(btl2cap_cmd_tree, pinfo, &ei_btl2cap_unknown_command_code, tvb, offset, -1);
offset += tvb_reported_length_remaining(tvb, offset);
break;
}
}
}
else if (cid == BTL2CAP_FIXED_CID_CONNLESS) { /* Connectionless reception channel */
col_append_str(pinfo->cinfo, COL_INFO, "Connectionless reception channel");
psm = tvb_get_letohs(tvb, offset);
if (pinfo->p2p_dir == P2P_DIR_RECV) {
l2cap_data->local_cid = cid;
l2cap_data->remote_cid = BTL2CAP_UNKNOWN_CID;
} else {
l2cap_data->local_cid = BTL2CAP_UNKNOWN_CID;
l2cap_data->remote_cid = cid;
}
l2cap_data->psm = psm;
l2cap_data->disconnect_in_frame = &bluetooth_max_disconnect_in_frame;
if (p_get_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM ) == NULL) {
guint16 *value_data;
value_data = wmem_new(wmem_file_scope(), guint16);
*value_data = psm;
p_add_proto_data(pinfo->pool, pinfo, proto_btl2cap, PROTO_DATA_BTL2CAP_PSM, value_data);
}
proto_tree_add_item(btl2cap_tree, hf_btl2cap_psm, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
next_tvb = tvb_new_subset_length_caplen(tvb, offset, tvb_captured_length_remaining(tvb, offset), length);
/* call next dissector */
if (!dissector_try_uint_new(l2cap_psm_dissector_table, (guint32) psm, next_tvb, pinfo, tree, TRUE, l2cap_data)) {
/* not a known fixed PSM, try to find a registered service to a dynamic PSM */
guint16 bt_uuid;
bluetooth_uuid_t uuid;
bt_uuid = get_service_uuid(pinfo, l2cap_data, psm, (pinfo->p2p_dir == P2P_DIR_RECV) ? TRUE : FALSE );
uuid.size = 2;
uuid.bt_uuid = bt_uuid;
uuid.data[0] = bt_uuid >> 8;
uuid.data[1] = bt_uuid & 0xFF;
if (bt_uuid && p_get_proto_data(pinfo->pool, pinfo, proto_bluetooth, PROTO_DATA_BLUETOOTH_SERVICE_UUID ) == NULL) {
gchar* value_data;
value_data = wmem_strdup(wmem_file_scope(), print_numeric_bluetooth_uuid(pinfo->pool, &uuid));
p_add_proto_data(pinfo->pool, pinfo, proto_bluetooth, PROTO_DATA_BLUETOOTH_SERVICE_UUID, value_data);
}
if (!dissector_try_string(bluetooth_uuid_table, print_numeric_bluetooth_uuid(pinfo->pool, &uuid), next_tvb, pinfo, tree, l2cap_data)) {
/* unknown protocol. declare as data */
proto_tree_add_item(btl2cap_tree, hf_btl2cap_payload, tvb, offset, length, ENC_NA);
}
offset = tvb_captured_length(tvb);
}
}
else if (cid <= BTL2CAP_FIXED_CID_LAST) {
if (cid == BTL2CAP_FIXED_CID_AMP_MAN) {
control = tvb_get_letohs(tvb, offset);
if (control & 0x1) {
offset = dissect_s_frame(tvb, pinfo, tree, btl2cap_tree, 0 /* unused */, length, offset, NULL /* unused */);
} else {
proto_item* ti_control;
proto_tree* ti_control_subtree;
ti_control = proto_tree_add_none_format(btl2cap_tree, hf_btl2cap_control, tvb,
offset, 2, "Control: %s reqseq:%d r:%d txseq:%d",
val_to_str_const((control & 0xC000) >> 14, control_sar_vals, "unknown"),
(control & 0x3F00) >> 8,
(control & 0x0080) >> 7,
(control & 0x007E) >> 1);
ti_control_subtree = proto_item_add_subtree(ti_control, ett_btl2cap_control);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_sar, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_reqseq, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_retransmissiondisable, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_txseq, tvb, offset, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(ti_control_subtree, hf_btl2cap_control_type, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(btl2cap_tree, hf_btl2cap_fcs, tvb, tvb_reported_length(tvb) - 2, 2, ENC_LITTLE_ENDIAN);
next_tvb = tvb_new_subset_length_caplen(tvb, offset, tvb_captured_length_remaining(tvb, offset)-2, length);
}
}
else {
next_tvb = tvb_new_subset_length_caplen(tvb, offset, tvb_captured_length_remaining(tvb, offset), length);
}
/* call next dissector */
if (next_tvb && !dissector_try_uint_new(l2cap_cid_dissector_table, (guint32) cid,
next_tvb, pinfo, tree, TRUE, l2cap_data)) {
/* unknown protocol. declare as data */
proto_tree_add_item(btl2cap_tree, hf_btl2cap_payload, tvb, offset, length, ENC_NA);
}
offset = tvb_captured_length(tvb);
}
else /* if (cid > BTL2CAP_FIXED_CID_LAST) */ { /* Connection oriented channel */
wmem_tree_key_t key[6];
guint32 k_interface_id;
guint32 k_adapter_id;
guint32 k_chandle;
guint32 k_cid;
guint32 k_frame_number;
guint32 interface_id;
guint32 adapter_id;
guint32 chandle;
guint32 key_cid;
if (pinfo->rec->presence_flags & WTAP_HAS_INTERFACE_ID)
interface_id = pinfo->rec->rec_header.packet_header.interface_id;
else
interface_id = HCI_INTERFACE_DEFAULT;
adapter_id = (acl_data) ? acl_data->adapter_id : HCI_ADAPTER_DEFAULT;
chandle = (acl_data) ? acl_data->chandle : 0;
key_cid = cid | ((pinfo->p2p_dir == P2P_DIR_RECV) ? 0x00000000 : 0x80000000);
k_interface_id = interface_id;
k_adapter_id = adapter_id;
k_chandle = chandle;
k_cid = key_cid;
k_frame_number = pinfo->num;
key[0].length = 1;
key[0].key = &k_interface_id;
key[1].length = 1;
key[1].key = &k_adapter_id;
key[2].length = 1;
key[2].key = &k_chandle;
key[3].length = 1;
key[3].key = &k_cid;
key[4].length = 1;
key[4].key = &k_frame_number;
key[5].length = 0;
key[5].key = NULL;
psm_data = (psm_data_t *)wmem_tree_lookup32_array_le(cid_to_psm_table, key);
if (psm_data &&
psm_data->interface_id == interface_id &&
psm_data->adapter_id == adapter_id &&
psm_data->chandle == chandle &&
(psm_data->local_cid == key_cid ||
psm_data->remote_cid == key_cid) &&
psm_data->disconnect_in_frame > pinfo->num)
{
config_data_t *config_data;
proto_item *sub_item;
guint32 bt_uuid;
psm = psm_data->psm;
l2cap_data->local_cid = psm_data->local_cid;
l2cap_data->remote_cid = psm_data->remote_cid;
l2cap_data->psm = psm;
l2cap_data->is_local_psm = psm_data->local_service;
l2cap_data->disconnect_in_frame = &psm_data->disconnect_in_frame;
if (pinfo->p2p_dir == P2P_DIR_RECV)
config_data = &(psm_data->in);
else
config_data = &(psm_data->out);
if (psm_data->connect_in_frame > 0 && psm_data->connect_in_frame < G_MAXUINT32) {
sub_item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_connect_in_frame, tvb, 0, 0, psm_data->connect_in_frame);
proto_item_set_generated(sub_item);
}
if (psm_data->disconnect_in_frame > 0 && psm_data->disconnect_in_frame < G_MAXUINT32) {
sub_item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_disconnect_in_frame, tvb, 0, 0, psm_data->disconnect_in_frame);
proto_item_set_generated(sub_item);
}
bt_uuid = get_service_uuid(pinfo, l2cap_data, psm_data->psm, psm_data->local_service);
if (bt_uuid) {
sub_item = proto_tree_add_uint(btl2cap_tree, hf_btl2cap_service, tvb, 0, 0, bt_uuid);
proto_item_set_generated(sub_item);
}
if (config_data->mode == L2CAP_BASIC_MODE) {
offset = dissect_b_frame(tvb, pinfo, tree, btl2cap_tree, cid, psm, psm_data->local_service, length, offset, l2cap_data);
} else if (config_data->mode == L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE) {
gboolean is_retransmit = FALSE;
if (acl_data) {
is_retransmit = acl_data->is_btle_retransmit;
}
offset = dissect_le_frame(tvb, pinfo, tree, btl2cap_tree, cid, psm, psm_data->local_service, length, offset, config_data, l2cap_data, is_retransmit);
} else {
control = tvb_get_letohs(tvb, offset);
if (control & 0x1) {
offset = dissect_s_frame(tvb, pinfo, tree, btl2cap_tree, psm, length, offset, config_data);
} else {
offset = dissect_i_frame(tvb, pinfo, tree, btl2cap_tree, psm_data, length, offset, config_data, l2cap_data);
}
}
} else {
psm = 0;
offset = dissect_b_frame(tvb, pinfo, tree, btl2cap_tree, cid, psm, FALSE, length, offset, l2cap_data);
}
}
return offset;
}
/* Register the protocol with Wireshark */
void
proto_register_btl2cap(void)
{
expert_module_t *expert_btl2cap;
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{ &hf_btl2cap_length,
{ "Length", "btl2cap.length",
FT_UINT16, BASE_DEC, NULL, 0x0,
"L2CAP Payload Length", HFILL }
},
{ &hf_btl2cap_cid,
{ "CID", "btl2cap.cid",
FT_UINT16, BASE_HEX | BASE_RANGE_STRING, RVALS(cid_rvals), 0x0,
"L2CAP Channel Identifier", HFILL }
},
{ &hf_btl2cap_payload,
{ "Payload", "btl2cap.payload",
FT_BYTES, BASE_NONE, NULL, 0x0,
"L2CAP Payload", HFILL }
},
{ &hf_btl2cap_command,
{ "Command", "btl2cap.command",
FT_NONE, BASE_NONE, NULL, 0x0,
"L2CAP Command", HFILL }
},
{ &hf_btl2cap_cmd_code,
{ "Command Code", "btl2cap.cmd_code",
FT_UINT8, BASE_HEX, VALS(command_code_vals), 0x0,
"L2CAP Command Code", HFILL }
},
{ &hf_btl2cap_cmd_ident,
{ "Command Identifier", "btl2cap.cmd_ident",
FT_UINT8, BASE_HEX, NULL, 0x0,
"L2CAP Command Identifier", HFILL }
},
{ &hf_btl2cap_cmd_length,
{ "Command Length", "btl2cap.cmd_length",
FT_UINT16, BASE_DEC, NULL, 0x0,
"L2CAP Command Length", HFILL }
},
{ &hf_btl2cap_cmd_data,
{ "Command Data", "btl2cap.cmd_data",
FT_NONE, BASE_NONE, NULL, 0x0,
"L2CAP Command Data", HFILL }
},
{ &hf_btl2cap_psm,
{ "PSM", "btl2cap.psm",
FT_UINT16, BASE_HEX, VALS(psm_vals), 0x0,
"Protocol/Service Multiplexer", HFILL }
},
{ &hf_btl2cap_psm_dynamic,
{ "Dynamic PSM", "btl2cap.psm",
FT_UINT16, BASE_HEX, NULL, 0x0,
"Dynamic Protocol/Service Multiplexer", HFILL }
},
{ &hf_btl2cap_scid,
{ "Source CID", "btl2cap.scid",
FT_UINT16, BASE_HEX | BASE_RANGE_STRING, RVALS(cid_rvals), 0x0,
"Source Channel Identifier", HFILL }
},
{ &hf_btl2cap_dcid,
{ "Destination CID", "btl2cap.dcid",
FT_UINT16, BASE_HEX | BASE_RANGE_STRING, RVALS(cid_rvals), 0x0,
"Destination Channel Identifier", HFILL }
},
{ &hf_btl2cap_icid,
{ "Initiator CID", "btl2cap.icid",
FT_UINT16, BASE_HEX | BASE_RANGE_STRING, RVALS(cid_rvals), 0x0,
"Initiator Channel Identifier", HFILL }
},
{ &hf_btl2cap_controller,
{ "Controller ID", "btl2cap.ctrl_id",
FT_UINT8, BASE_DEC, VALS(ctrl_id_code_vals), 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_dcontroller,
{ "Controller ID", "btl2cap.dctrl_id",
FT_UINT8, BASE_DEC, VALS(ctrl_id_code_vals), 0x0,
"Destination Controller ID", HFILL }
},
{ &hf_btl2cap_result,
{ "Result", "btl2cap.result",
FT_UINT16, BASE_HEX, VALS(result_vals), 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_move_result,
{ "Move Result", "btl2cap.move_result",
FT_UINT16, BASE_HEX, VALS(move_result_vals), 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_move_confirmation_result,
{ "Move Result", "btl2cap.move_result",
FT_UINT16, BASE_HEX, VALS(move_result_confirmation_vals), 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_status,
{ "Status", "btl2cap.status",
FT_UINT16, BASE_HEX, VALS(status_vals), 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_rej_reason,
{ "Reason", "btl2cap.rej_reason",
FT_UINT16, BASE_HEX, VALS(reason_vals), 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_sig_mtu,
{ "Maximum Signalling MTU", "btl2cap.sig_mtu",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_info_mtu,
{ "Remote Entity MTU", "btl2cap.info_mtu",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Remote entity acceptable connectionless MTU", HFILL }
},
{ &hf_btl2cap_info_flowcontrol,
{ "Flow Control Mode", "btl2cap.info_flowcontrol",
FT_UINT32, BASE_DEC, NULL, 0x01,
"Flow Control mode support", HFILL }
},
{ &hf_btl2cap_info_retransmission,
{ "Retransmission Mode", "btl2cap.info_retransmission",
FT_UINT32, BASE_DEC, NULL, 0x02,
"Retransmission mode support", HFILL }
},
{ &hf_btl2cap_info_bidirqos,
{ "Bi-Directional QOS", "btl2cap.info_bidirqos",
FT_UINT32, BASE_DEC, NULL, 0x04,
"Bi-Directional QOS support", HFILL }
},
{ &hf_btl2cap_info_enh_retransmission,
{ "Enhanced Retransmission Mode", "btl2cap.info_enh_retransmission",
FT_UINT32, BASE_DEC, NULL, 0x08,
"Enhanced Retransmission mode support", HFILL }
},
{ &hf_btl2cap_info_streaming,
{ "Streaming Mode", "btl2cap.info_streaming",
FT_UINT32, BASE_DEC, NULL, 0x10,
"Streaming mode support", HFILL }
},
{ &hf_btl2cap_info_fcs,
{ "FCS", "btl2cap.info_fcs",
FT_UINT32, BASE_DEC, NULL, 0x20,
"FCS support", HFILL }
},
{ &hf_btl2cap_info_flow_spec,
{ "Extended Flow Specification for BR/EDR", "btl2cap.info_flow_spec",
FT_UINT32, BASE_DEC, NULL, 0x40,
"Extended Flow Specification for BR/EDR support", HFILL }
},
{ &hf_btl2cap_info_fixedchan,
{ "Fixed Channels", "btl2cap.info_fixedchan",
FT_UINT32, BASE_DEC, NULL, 0x80,
"Fixed Channels support", HFILL }
},
{ &hf_btl2cap_info_window,
{ "Extended Window Size", "btl2cap.info_window",
FT_UINT32, BASE_DEC, NULL, 0x0100,
"Extended Window Size support", HFILL }
},
{ &hf_btl2cap_info_unicast,
{ "Unicast Connectionless Data Reception", "btl2cap.info_unicast",
FT_UINT32, BASE_DEC, NULL, 0x0200,
"Unicast Connectionless Data Reception support", HFILL }
},
{ &hf_btl2cap_info_fixedchans,
{ "Fixed Channels", "btl2cap.info_fixedchans",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_info_fixedchans_null,
{ "Null identifier", "btl2cap.info_fixedchans_null",
FT_UINT32, BASE_DEC, NULL, 0x1,
NULL, HFILL }
},
{ &hf_btl2cap_info_fixedchans_signal,
{ "L2CAP signaling channel", "btl2cap.info_fixedchans_signal",
FT_UINT32, BASE_DEC, NULL, 0x2,
NULL, HFILL }
},
{ &hf_btl2cap_info_fixedchans_connless,
{ "Connectionless reception", "btl2cap.info_fixedchans_connless",
FT_UINT32, BASE_DEC, NULL, 0x4,
NULL, HFILL }
},
{ &hf_btl2cap_info_fixedchans_amp_man,
{ "AMP Manager protocol", "btl2cap.info_fixedchans_amp_man",
FT_UINT32, BASE_DEC, NULL, 0x8,
NULL, HFILL }
},
{ &hf_btl2cap_info_fixedchans_amp_test,
{ "AMP Test Manager", "btl2cap.info_fixedchans_amp_test",
FT_UINT32, BASE_DEC, NULL, 0x80000000,
NULL, HFILL }
},
{ &hf_btl2cap_info_type,
{ "Information Type", "btl2cap.info_type",
FT_UINT16, BASE_HEX, VALS(info_type_vals), 0x0,
"Type of implementation-specific information", HFILL }
},
{ &hf_btl2cap_info_result,
{ "Result", "btl2cap.info_result",
FT_UINT16, BASE_HEX, VALS(info_result_vals), 0x0,
"Information about the success of the request", HFILL }
},
{ &hf_btl2cap_info_extfeatures,
{ "Extended Features", "btl2cap.info_extfeatures",
FT_NONE, BASE_NONE, NULL, 0x0,
"Extended Features Mask", HFILL }
},
{ &hf_btl2cap_flags_reserved,
{ "Reserved", "btl2cap.flags.reserved",
FT_UINT16, BASE_HEX, NULL, 0xFFFE,
NULL, HFILL }
},
{ &hf_btl2cap_flags_continuation,
{ "Continuation Flag", "btl2cap.flags.continuation",
FT_BOOLEAN, 16, NULL, 0x0001,
NULL, HFILL }
},
{ &hf_btl2cap_configuration_result,
{ "Result", "btl2cap.conf_result",
FT_UINT16, BASE_HEX, VALS(configuration_result_vals), 0x0,
"Configuration Result", HFILL }
},
{ &hf_btl2cap_option_type,
{ "Type", "btl2cap.option_type",
FT_UINT8, BASE_HEX, VALS(option_type_vals), 0x0,
"Type of option", HFILL }
},
{ &hf_btl2cap_option_length,
{ "Length", "btl2cap.option_length",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Number of octets in option payload", HFILL }
},
{ &hf_btl2cap_option_mtu,
{ "MTU", "btl2cap.option_mtu",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Maximum Transmission Unit", HFILL }
},
{ &hf_btl2cap_option_flushTO,
{ "Flush Timeout (ms)", "btl2cap.option_flushto",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Flush Timeout in milliseconds", HFILL }
},
{ &hf_btl2cap_option_flush_to_us,
{ "Flush Timeout (us)", "btl2cap.option_flushto",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Flush Timeout (microseconds)", HFILL }
},
{ &hf_btl2cap_option_sdu_size,
{ "Maximum SDU Size", "btl2cap.option_sdu_size",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_option_sdu_arrival_time,
{ "SDU Inter-arrival Time (us)", "btl2cap.option_sdu_arrival_time",
FT_UINT32, BASE_DEC, NULL, 0x0,
"SDU Inter-arrival Time (microseconds)", HFILL }
},
{ &hf_btl2cap_option_identifier,
{ "Identifier", "btl2cap.option_ident",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Flow Specification Identifier", HFILL }
},
{ &hf_btl2cap_option_access_latency,
{ "Access Latency (us)", "btl2cap.option_access_latency",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Access Latency (microseconds)", HFILL }
},
{ &hf_btl2cap_option_flags,
{ "Flags", "btl2cap.option_flags",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Flags - must be set to 0 (Reserved for future use)", HFILL }
},
{ &hf_btl2cap_option_service_type,
{ "Service Type", "btl2cap.option_servicetype",
FT_UINT8, BASE_HEX, VALS(option_servicetype_vals), 0x0,
"Level of service required", HFILL }
},
{ &hf_btl2cap_option_tokenrate,
{ "Token Rate (bytes/s)", "btl2cap.option_tokenrate",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Rate at which traffic credits are granted (bytes/s)", HFILL }
},
{ &hf_btl2cap_option_tokenbucketsize,
{ "Token Bucket Size (bytes)", "btl2cap.option_tokenbsize",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Size of the token bucket (bytes)", HFILL }
},
{ &hf_btl2cap_option_peakbandwidth,
{ "Peak Bandwidth (bytes/s)", "btl2cap.option_peakbandwidth",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Limit how fast packets may be sent (bytes/s)", HFILL }
},
{ &hf_btl2cap_option_latency,
{ "Latency (microseconds)", "btl2cap.option_latency",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Maximal acceptable delay (microseconds)", HFILL }
},
{ &hf_btl2cap_option_delayvariation,
{ "Delay Variation (microseconds)", "btl2cap.option_delayvar",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Difference between maximum and minimum delay (microseconds)", HFILL }
},
{ &hf_btl2cap_option_retransmissionmode,
{ "Mode", "btl2cap.retransmissionmode",
FT_UINT8, BASE_HEX, VALS(option_retransmissionmode_vals), 0x0,
"Retransmission/Flow Control mode", HFILL }
},
{ &hf_btl2cap_option_txwindow,
{ "TxWindow", "btl2cap.txwindow",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Retransmission window size", HFILL }
},
{ &hf_btl2cap_option_maxtransmit,
{ "MaxTransmit", "btl2cap.maxtransmit",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Maximum I-frame retransmissions", HFILL }
},
{ &hf_btl2cap_option_retransmittimeout,
{ "Retransmit timeout (ms)", "btl2cap.retransmittimeout",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Retransmission timeout (milliseconds)", HFILL }
},
{ &hf_btl2cap_option_monitortimeout,
{ "Monitor Timeout (ms)", "btl2cap.monitortimeout",
FT_UINT16, BASE_DEC, NULL, 0x0,
"S-frame transmission interval (milliseconds)", HFILL }
},
{ &hf_btl2cap_option_mps,
{ "MPS", "btl2cap.mps",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Maximum PDU Payload Size", HFILL }
},
{ &hf_btl2cap_option_fcs,
{ "FCS", "btl2cap.option_fcs",
FT_UINT16, BASE_HEX, VALS(option_fcs_vals), 0x0,
"Frame Check Sequence", HFILL }
},
{ &hf_btl2cap_option_window,
{ "Extended Window Size", "btl2cap.option_window",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_option,
{ "Configuration Parameter Option", "btl2cap.conf_param_option",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_control_sar,
{ "Segmentation and reassembly", "btl2cap.control_sar",
FT_UINT16, BASE_HEX, VALS(control_sar_vals), 0xC000,
NULL, HFILL }
},
{ &hf_btl2cap_control_reqseq,
{ "ReqSeq", "btl2cap.control_reqseq",
FT_UINT16, BASE_DEC, NULL, 0x3F00,
"Request Sequence Number", HFILL }
},
{ &hf_btl2cap_control_txseq,
{ "TxSeq", "btl2cap.control_txseq",
FT_UINT16, BASE_DEC, NULL, 0x007E,
"Transmitted Sequence Number", HFILL }
},
{ &hf_btl2cap_control_retransmissiondisable,
{ "R", "btl2cap.control_retransmissiondisable",
FT_UINT16, BASE_HEX, NULL, 0x0080,
"Retransmission Disable", HFILL }
},
{ &hf_btl2cap_control_supervisory,
{ "S", "btl2cap.control_supervisory",
FT_UINT16, BASE_HEX, VALS(control_supervisory_vals), 0x000C,
"Supervisory Function", HFILL }
},
{ &hf_btl2cap_control_type,
{ "Frame Type", "btl2cap.control_type",
FT_UINT16, BASE_HEX, VALS(control_type_vals), 0x0001,
NULL, HFILL }
},
{ &hf_btl2cap_control,
{ "Control field", "btl2cap.control",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_fcs,
{ "FCS", "btl2cap.fcs",
FT_UINT16, BASE_HEX, NULL, 0,
"Frame Check Sequence", HFILL }
},
{ &hf_btl2cap_sdulength,
{ "SDU Length", "btl2cap.sdulength",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_btl2cap_reassembled_in,
{ "This SDU is reassembled in frame", "btl2cap.reassembled_in",
FT_FRAMENUM, BASE_NONE, NULL, 0,
"This SDU is reassembled in frame #", HFILL }
},
{ &hf_btl2cap_continuation_to,
{ "This is a continuation to the SDU in frame", "btl2cap.continuation_to",
FT_FRAMENUM, BASE_NONE, NULL, 0,
"This is a continuation to the SDU in frame #", HFILL }
},
{ &hf_btl2cap_min_interval,
{ "Min. Interval", "btl2cap.min_interval",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_btl2cap_max_interval,
{ "Max. Interval", "btl2cap.max_interval",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_btl2cap_slave_latency,
{ "Slave Latency", "btl2cap.slave_latency",
FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_ll_connection_event, 0,
NULL, HFILL }
},
{ &hf_btl2cap_timeout_multiplier,
{ "Timeout Multiplier", "btl2cap.timeout_multiplier",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_btl2cap_conn_param_result,
{ "Move Result", "btl2cap.move_result",
FT_UINT16, BASE_HEX, VALS(conn_param_result_vals), 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_le_result,
{ "LE Result", "btl2cap.le_result",
FT_UINT16, BASE_HEX, VALS(le_result_vals), 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_credits,
{ "Credits", "btl2cap.credits",
FT_UINT16, BASE_DEC, NULL, 0x0,
"L2CAP Channel Identifier", HFILL }
},
{ &hf_btl2cap_initial_credits,
{ "Initial Credits", "btl2cap.initial_credits",
FT_UINT16, BASE_DEC, NULL, 0x0,
"L2CAP Channel Identifier", HFILL }
},
{ &hf_btl2cap_le_psm,
{ "LE PSM", "btl2cap.le_psm",
FT_UINT16, BASE_HEX | BASE_RANGE_STRING, RVALS(le_psm_rvals), 0x0,
"Protocol/Service Multiplexer", HFILL }
},
{ &hf_btl2cap_data,
{ "Data", "btl2cap.data",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_service,
{ "Service", "btl2cap.service",
FT_UINT16, BASE_HEX, VALS(bluetooth_uuid_vals), 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_connect_in_frame,
{ "Connect in frame", "btl2cap.connect_in",
FT_FRAMENUM, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_disconnect_in_frame,
{ "Disconnect in frame", "btl2cap.disconnect_in",
FT_FRAMENUM, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_fragments,
{ "SDU fragments", "btl2cap.le_sdu.fragments",
FT_NONE, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_fragment,
{ "SDU fragment", "btl2cap.le_sdu.fragment",
FT_FRAMENUM, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_fragment_overlap,
{ "SDU fragment overlap", "btl2cap.le_sdu.fragment.overlap",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_fragment_overlap_conflicts,
{ "SDU fragment overlapping with conflicting data", "btl2cap.le_sdu.fragment.overlap.conflicts",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_fragment_multiple_tails,
{ "SDU has multiple tail fragments", "btl2cap.le_sdu.fragment.multiple_tails",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_fragment_too_long_fragment,
{ "SDU fragment too long", "btl2cap.le_sdu.fragment.too_long_fragment",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_fragment_error,
{ "SDU defragmentation error", "btl2cap.le_sdu.fragment.error",
FT_FRAMENUM, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_fragment_count,
{ "SDU fragment count", "btl2cap.le_sdu.fragment.count",
FT_UINT32, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_reassembled_in,
{ "Reassembled in", "btl2cap.le_sdu.reassembled.in",
FT_FRAMENUM, BASE_NONE, NULL, 0x00,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_reassembled_length,
{ "Reassembled SDU length", "btl2cap.le_sdu.reassembled.length",
FT_UINT32, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
{ &hf_btl2cap_le_sdu_length,
{ "SDU Length", "btl2cap.le_sdu_length",
FT_UINT16, BASE_DEC, NULL, 0x00,
NULL, HFILL }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_btl2cap,
&ett_btl2cap_cmd,
&ett_btl2cap_option,
&ett_btl2cap_extfeatures,
&ett_btl2cap_fixedchans,
&ett_btl2cap_control,
&ett_btl2cap_le_sdu_fragment,
&ett_btl2cap_le_sdu_fragments
};
static ei_register_info ei[] = {
{ &ei_btl2cap_parameter_mismatch, { "btl2cap.parameter_mismatch", PI_PROTOCOL, PI_WARN, "Parameter mismatch", EXPFILL }},
{ &ei_btl2cap_sdulength_bad, { "btl2cap.sdulength.bad", PI_MALFORMED, PI_WARN, "SDU length bad", EXPFILL }},
{ &ei_btl2cap_length_bad, { "btl2cap.length.bad", PI_MALFORMED, PI_WARN, "Length too short", EXPFILL }},
{ &ei_btl2cap_unknown_command_code, { "btl2cap.unknown_command_code", PI_PROTOCOL, PI_WARN, "Unknown Command Code", EXPFILL }},
};
/* Decode As handling */
static build_valid_func btl2cap_cid_da_build_value[1] = {btl2cap_cid_value};
static decode_as_value_t btl2cap_cid_da_values = {btl2cap_cid_prompt, 1, btl2cap_cid_da_build_value};
static decode_as_t btl2cap_cid_da = {"btl2cap", "btl2cap.cid", 1, 0, &btl2cap_cid_da_values, NULL, NULL,
decode_as_default_populate_list, decode_as_default_reset, decode_as_default_change, NULL};
static build_valid_func btl2cap_psm_da_build_value[1] = {btl2cap_psm_value};
static decode_as_value_t btl2cap_psm_da_values = {btl2cap_psm_prompt, 1, btl2cap_psm_da_build_value};
static decode_as_t btl2cap_psm_da = {"btl2cap", "btl2cap.psm", 1, 0, &btl2cap_psm_da_values, NULL, NULL,
decode_as_default_populate_list, decode_as_default_reset, decode_as_default_change, NULL};
/* Register the protocol name and description */
proto_btl2cap = proto_register_protocol("Bluetooth L2CAP Protocol", "BT L2CAP", "btl2cap");
register_dissector("btl2cap", dissect_btl2cap, proto_btl2cap);
/* subdissector code */
l2cap_psm_dissector_table = register_dissector_table("btl2cap.psm", "BT L2CAP PSM", proto_btl2cap, FT_UINT16, BASE_HEX);
l2cap_cid_dissector_table = register_dissector_table("btl2cap.cid", "BT L2CAP CID", proto_btl2cap, FT_UINT16, BASE_HEX);
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_btl2cap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_btl2cap = expert_register_protocol(proto_btl2cap);
expert_register_field_array(expert_btl2cap, ei, array_length(ei));
cmd_ident_to_psm_table = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
cid_to_psm_table = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
register_decode_as(&btl2cap_cid_da);
register_decode_as(&btl2cap_psm_da);
reassembly_table_register(&btl2cap_le_sdu_reassembly_table,
&addresses_reassembly_table_functions);
}
void
proto_reg_handoff_btl2cap(void)
{
}
/*
* Editor modelines - https://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:
*/
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