/* packet-btrfcomm.c * Routines for Bluetooth RFCOMM protocol dissection * and RFCOMM based profile dissection: * - Dial-Up Networking Profile (DUN) * - Serial Port Profile (SPP) * - Global Navigation Satellite System (GNSS) * * Copyright 2002, Wolfgang Hansmann * * Refactored for wireshark checkin * Ronnie Sahlberg 2006 * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "config.h" #include #include #include #include #include #include #include "packet-bluetooth.h" #include "packet-btsdp.h" #include "packet-btl2cap.h" #include "packet-btrfcomm.h" static int hf_pf = -1; static int hf_ea = -1; static int hf_len = -1; static int hf_frame_type = -1; static int hf_cr = -1; static int hf_dlci = -1; static int hf_channel = -1; static int hf_direction = -1; static int hf_priority = -1; static int hf_error_recovery_mode = -1; static int hf_max_frame_size = -1; static int hf_max_retrans = -1; static int hf_fc_credits = -1; static int hf_mcc_pn_parameters = -1; static int hf_pn_i14 = -1; static int hf_pn_c14 = -1; static int hf_mcc = -1; static int hf_mcc_types = -1; static int hf_mcc_len = -1; static int hf_mcc_ea = -1; static int hf_mcc_cr = -1; static int hf_mcc_cmd = -1; static int hf_msc_parameters = -1; static int hf_msc_fc = -1; static int hf_msc_rtc = -1; static int hf_msc_rtr = -1; static int hf_msc_ic = -1; static int hf_msc_dv = -1; static int hf_msc_l = -1; static int hf_msc_break_bits = -1; static int hf_fcs = -1; static int hf_dun_at_cmd = -1; static int hf_spp_data = -1; static int hf_gnss_data = -1; static int hf_mcc_dlci = -1; static int hf_mcc_channel = -1; static int hf_mcc_direction = -1; static int hf_mcc_const_1 = -1; static int hf_mcc_pn_dlci = -1; static int hf_mcc_pn_channel = -1; static int hf_mcc_pn_direction = -1; static int hf_mcc_pn_zeros_padding = -1; static int hf_acknowledgement_timer_t1 = -1; static int hf_address = -1; static int hf_control = -1; /* Initialize the protocol and registered fields */ int proto_btrfcomm = -1; static int proto_btdun = -1; static int proto_btspp = -1; static int proto_btgnss = -1; /* Initialize the subtree pointers */ static gint ett_btrfcomm = -1; static gint ett_btrfcomm_ctrl = -1; static gint ett_addr = -1; static gint ett_control = -1; static gint ett_mcc = -1; static gint ett_ctrl_pn_ci = -1; static gint ett_ctrl_pn_v24 = -1; static gint ett_dlci = -1; static gint ett_mcc_dlci = -1; static gint ett_btdun = -1; static gint ett_btspp = -1; static gint ett_btgnss = -1; static expert_field ei_btrfcomm_mcc_length_bad = EI_INIT; static dissector_handle_t btrfcomm_handle; static dissector_handle_t btdun_handle; static dissector_handle_t btspp_handle; static dissector_handle_t btgnss_handle; static dissector_table_t rfcomm_dlci_dissector_table; static wmem_tree_t *service_directions = NULL; typedef struct { guint32 direction; guint32 end_in; } service_direction_t; typedef struct { guint channel; gchar* payload_proto_name; dissector_handle_t payload_proto; } uat_rfcomm_channels_t; static gboolean rfcomm_channels_enabled = FALSE; static uat_t *uat_rfcomm_channels = NULL; static uat_rfcomm_channels_t *rfcomm_channels = NULL; static guint num_rfcomm_channels = 0; UAT_DEC_CB_DEF(rfcomm_channels, channel, uat_rfcomm_channels_t) UAT_PROTO_DEF(rfcomm_channels, payload_proto, payload_proto, payload_proto_name, uat_rfcomm_channels_t) static uat_field_t uat_rfcomm_channels_fields[] = { UAT_FLD_DEC(rfcomm_channels, channel, "RFCOMM Channel", "Range: 0-32"), UAT_FLD_PROTO(rfcomm_channels, payload_proto, "Payload protocol", "Dissector name used to decode RFCOMM channel"), UAT_END_FIELDS }; static dissector_handle_t ppp_handle; static const value_string vs_ctl_pn_i[] = { {0x0, "use UIH Frames"}, #if 0 /* specified by 07.10, but not used by RFCOMM */ {0x1, "use UI Frames"}, {0x2, "use I Frames"}, #endif {0, NULL} }; static const value_string vs_ctl_pn_cl[] = { {0x0, "no credit based flow control scheme"}, {0xe, "support of credit based flow control scheme (resp)"}, {0xf, "support of credit based flow control scheme (req)"}, #if 0 /* specified by 07.10. Redefined by RFCOMM */ {0x0, "type 1 (unstructured octet stream)"}, {0x1, "type 2 (unstructured octet stream with flow control)"}, {0x2, "type 3 (uninterruptible framed data)"}, {0x3, "type 4 (interruptible framed data)"}, #endif {0, NULL} }; static const value_string vs_frame_type[] = { /* masked 0xef */ {0x2f, "Set Asynchronous Balanced Mode (SABM)"}, {0x63, "Unnumbered Acknowledgement (UA)"}, {0x0f, "Disconnected Mode (DM)"}, {0x43, "Disconnect (DISC)"}, {0xef, "Unnumbered Information with Header check (UIH)"}, #if 0 /* specified by 07.10, but not used by RFCOMM */ {0x03, "Unnumbered Information (UI)"}, #endif {0, NULL} }; static const value_string vs_frame_type_short[] = { /* masked 0xef */ {0x2f, "SABM"}, {0x63, "UA"}, {0x0f, "DM"}, {0x43, "DISC"}, {0xef, "UIH"}, #if 0 /* specified by 07.10, but not used by RFCOMM */ {0x03, "UI"}, #endif {0, NULL} }; #define FRAME_TYPE_SABM 0x2F #define FRAME_TYPE_UIH 0xEF static const value_string vs_ctl[] = { /* masked 0xfc */ {0x20, "DLC Parameter Negotiation (PN)"}, {0x08, "Test Command (Test)"}, {0x28, "Flow Control On Command (FCon)"}, {0x18, "Flow Control Off Command (FCoff)"}, {0x38, "Modem Status Command (MSC)"}, {0x04, "Non Supported Command Response (NSC)"}, {0x24, "Remote Port Negotiation Command (RPN)"}, {0x14, "Remote Line Status Command (RLS)"}, #if 0 /* Specified by 07.10, but not used by RFCOMM */ {0x10, "Power Saving Control (PSC)"}, {0x30, "Multiplexer close down (CLD)"}, {0x34, "Service Negotiation Command (SNC)"}, #endif #if 0 /* old */ {0x80, "DLC parameter negotiation (PN)"}, {0x20, "Test Command (Test)"}, {0xa0, "Flow Control On Command (FCon)"}, {0x60, "Flow Control Off Command (FCoff)"}, {0xe0, "Modem Status Command (MSC)"}, {0x10, "Non Supported Command Response (NSC)"}, {0x90, "Remote Port Negotiation Command (RPN)"}, {0x50, "Remote Line Status Command (RLS)"}, {0x40, "Power Saving Control (PSC)"}, {0xc0, "Multiplexer close down (CLD)"}, {0xd0, "Service Negotiation Command (SNC)"}, #endif {0x0, NULL} }; static const value_string vs_ea[] = { {1, "Last field octet"}, {0, "More field octets following"}, {0, NULL} }; static const value_string vs_cr[] = { {1, "Command"}, {0, "Response"}, {0, NULL} }; void proto_register_btrfcomm(void); void proto_reg_handoff_btrfcomm(void); void proto_register_btdun(void); void proto_reg_handoff_btdun(void); void proto_register_btspp(void); void proto_reg_handoff_btspp(void); void proto_register_btgnss(void); void proto_reg_handoff_btgnss(void); #define PROTO_DATA_BTRFCOMM_DIRECTED_CHANNEL 0 static void btrfcomm_directed_channel_prompt(packet_info *pinfo, gchar* result) { guint8 *value_data; value_data = (guint8 *) p_get_proto_data(pinfo->pool, pinfo, proto_btrfcomm, PROTO_DATA_BTRFCOMM_DIRECTED_CHANNEL); if (value_data) g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "RFCOMM Channel %d (direction: %u) as", (guint) (*value_data) >> 1, (guint) (*value_data) & 1); else g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Unknown RFCOMM Channel"); } static gpointer btrfcomm_directed_channel_value(packet_info *pinfo) { guint8 *value_data; value_data = (guint8 *) p_get_proto_data(pinfo->pool, pinfo, proto_btrfcomm, PROTO_DATA_BTRFCOMM_DIRECTED_CHANNEL); if (value_data) return GUINT_TO_POINTER((gulong)*value_data); return NULL; } static dissector_handle_t find_proto_by_channel(guint channel) { guint i_channel; for (i_channel = 0; i_channel < num_rfcomm_channels; ++i_channel) { if (rfcomm_channels[i_channel].channel == channel) { return rfcomm_channels[i_channel].payload_proto; } } return NULL; } static int get_le_multi_byte_value(tvbuff_t *tvb, int offset, proto_tree *tree, guint32 *val_ptr, int hf_index) { guint8 byte, bc = 0; guint32 val = 0; int start_offset = offset; do { byte = tvb_get_guint8(tvb, offset); offset += 1; val |= ((byte >> 1) & 0xff) << (bc++ * 7); } while ((byte & 0x1) == 0); *val_ptr = val; if (hf_index > 0) { proto_tree_add_uint(tree, hf_index, tvb, start_offset, offset - start_offset, val); } return offset; } static int dissect_ctrl_pn(proto_tree *t, tvbuff_t *tvb, int offset, guint8 *mcc_channel) { proto_tree *st; proto_item *ti; proto_tree *dlci_tree; proto_item *dlci_item; proto_item *item; int mcc_dlci; guint8 flags; proto_tree_add_item(t, hf_mcc_pn_zeros_padding, tvb, offset, 1, ENC_LITTLE_ENDIAN); /* mcc dlci */ mcc_dlci = tvb_get_guint8(tvb, offset) & 0x3f; *mcc_channel = mcc_dlci >> 1; dlci_item = proto_tree_add_item(t, hf_mcc_pn_dlci, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_item_append_text(dlci_item, " (Direction: %d, Channel: %u)", mcc_dlci & 0x01, *mcc_channel); dlci_tree = proto_item_add_subtree(dlci_item, ett_mcc_dlci); proto_tree_add_item(dlci_tree, hf_mcc_pn_channel, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(dlci_tree, hf_mcc_pn_direction, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; flags = tvb_get_guint8(tvb, offset); ti = proto_tree_add_none_format(t, hf_mcc_pn_parameters, tvb, offset, 1, "I1-I4: 0x%x, C1-C4: 0x%x", flags & 0xf, (flags >> 4) & 0xf); st = proto_item_add_subtree(ti, ett_ctrl_pn_ci); proto_tree_add_item(st, hf_pn_c14, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(st, hf_pn_i14, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; /* priority */ proto_tree_add_item(t, hf_priority, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; /* Ack timer */ item = proto_tree_add_item(t, hf_acknowledgement_timer_t1, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_item_append_text(item, "(%d ms)", (guint32)tvb_get_guint8(tvb, offset) * 100); offset += 1; /* max frame size */ proto_tree_add_item(t, hf_max_frame_size, tvb, offset, 2, ENC_LITTLE_ENDIAN); offset += 2; /* max retrans */ proto_tree_add_item(t, hf_max_retrans, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; /* error recovery mode */ proto_tree_add_item(t, hf_error_recovery_mode, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; return offset; } static int dissect_ctrl_msc(proto_tree *t, tvbuff_t *tvb, int offset, int length, guint8 *mcc_channel) { proto_tree *st; proto_item *it; proto_tree *dlci_tree; proto_item *dlci_item; guint8 mcc_dlci; guint8 status; int start_offset; mcc_dlci = tvb_get_guint8(tvb, offset) >> 2; *mcc_channel = mcc_dlci >> 1; dlci_item = proto_tree_add_item(t, hf_mcc_dlci, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_item_append_text(dlci_item, " (Direction: %d, Channel: %u)", mcc_dlci & 0x01, *mcc_channel); dlci_tree = proto_item_add_subtree(dlci_item, ett_mcc_dlci); proto_tree_add_item(dlci_tree, hf_mcc_channel, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(dlci_tree, hf_mcc_direction, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(t, hf_mcc_const_1, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(t, hf_mcc_ea, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; start_offset = offset; status = tvb_get_guint8(tvb, offset); it = proto_tree_add_none_format(t, hf_msc_parameters, tvb, offset, 1, "V.24 Signals: FC = %d, RTC = %d, RTR = %d, IC = %d, DV = %d", (status >> 1) & 1, (status >> 2) & 1, (status >> 3) & 1, (status >> 6) & 1, (status >> 7) & 1); st = proto_item_add_subtree(it, ett_ctrl_pn_v24); proto_tree_add_item(st, hf_msc_fc, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(st, hf_msc_rtc, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(st, hf_msc_rtr, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(st, hf_msc_ic, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(st, hf_msc_dv, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; if (length == 3) { proto_tree_add_item(t, hf_msc_break_bits, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(t, hf_msc_l, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; } proto_item_set_len(it, offset - start_offset); return offset; } static int dissect_btrfcomm_address(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree, guint8 *ea_flagp, guint8 *cr_flagp, guint8 *dlcip) { proto_item *ti; proto_tree *addr_tree; proto_tree *dlci_tree = NULL; proto_item *dlci_item = NULL; guint8 dlci, cr_flag, ea_flag, flags, channel; flags = tvb_get_guint8(tvb, offset); ea_flag = flags & 0x01; if (ea_flagp) { *ea_flagp = ea_flag; } cr_flag = (flags & 0x02) ? 1 : 0; if (cr_flagp) { *cr_flagp = cr_flag; } dlci = flags >> 2; if (dlcip) { *dlcip = dlci; } ti = proto_tree_add_none_format(tree, hf_address, tvb, offset, 1, "Address: E/A flag: %d, C/R flag: %d, Direction: %d, Channel: %u", ea_flag, cr_flag, dlci & 0x01, dlci >> 1); addr_tree = proto_item_add_subtree(ti, ett_addr); dlci_item = proto_tree_add_item(addr_tree, hf_dlci, tvb, offset, 1, ENC_LITTLE_ENDIAN); channel = dlci >> 1; proto_item_append_text(dlci_item, " (Direction: %d, Channel: %u)", dlci & 0x01, channel); if (p_get_proto_data(pinfo->pool, pinfo, proto_btrfcomm, PROTO_DATA_BTRFCOMM_DIRECTED_CHANNEL) == NULL) { guint8 *value_data; value_data = wmem_new(wmem_file_scope(), guint8); *value_data = dlci; p_add_proto_data(pinfo->pool, pinfo, proto_btrfcomm, PROTO_DATA_BTRFCOMM_DIRECTED_CHANNEL, value_data); } dlci_tree = proto_item_add_subtree(dlci_item, ett_dlci); proto_tree_add_item(dlci_tree, hf_channel, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(dlci_tree, hf_direction, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(addr_tree, hf_cr, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(addr_tree, hf_ea, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; return offset; } static int dissect_btrfcomm_control(tvbuff_t *tvb, int offset, proto_tree *tree, guint8 *pf_flagp, guint8 *frame_typep) { proto_item *ti; proto_tree *hctl_tree; guint8 frame_type, pf_flag, flags; flags = tvb_get_guint8(tvb, offset); pf_flag = (flags & 0x10) ? 1 : 0; if (pf_flagp) { *pf_flagp = pf_flag; } frame_type = flags & 0xef; if (frame_typep) { *frame_typep = frame_type; } ti = proto_tree_add_none_format(tree, hf_control, tvb, offset, 1, "Control: Frame type: %s (0x%x), P/F flag: %d", val_to_str_const(frame_type, vs_frame_type, "Unknown"), frame_type, pf_flag); hctl_tree = proto_item_add_subtree(ti, ett_control); proto_tree_add_item(hctl_tree, hf_pf, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(hctl_tree, hf_frame_type, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; return offset; } static int dissect_btrfcomm_payload_length(tvbuff_t *tvb, int offset, proto_tree *tree, guint16 *frame_lenp) { guint16 frame_len; int start_offset = offset; frame_len = tvb_get_guint8(tvb, offset); offset += 1; if (frame_len & 0x01) { frame_len >>= 1; /* 0 - 127 */ } else { frame_len >>= 1; /* 128 - ... */ frame_len |= (tvb_get_guint8(tvb, offset)) << 7; offset += 1; } proto_tree_add_uint(tree, hf_len, tvb, start_offset, offset - start_offset, frame_len); if (frame_lenp) { *frame_lenp = frame_len; } return offset; } static int dissect_btrfcomm_MccType(tvbuff_t *tvb, int offset, proto_tree *tree, guint8 *mcc_cr_flagp, guint8 *mcc_ea_flagp, guint32 *mcc_typep) { int start_offset = offset; proto_item *ti; proto_tree *mcc_tree; guint8 flags, mcc_cr_flag, mcc_ea_flag; guint32 mcc_type; flags = tvb_get_guint8(tvb, offset); mcc_cr_flag = (flags & 0x2) ? 1 : 0; if (mcc_cr_flagp) { *mcc_cr_flagp = mcc_cr_flag; } mcc_ea_flag = flags & 0x1; if (mcc_ea_flagp) { *mcc_ea_flagp = mcc_ea_flag; } offset = get_le_multi_byte_value(tvb, offset, tree, &mcc_type, -1); mcc_type = (mcc_type >> 1) & 0x3f; /* shift c/r flag off */ if (mcc_typep) { *mcc_typep = mcc_type; } ti = proto_tree_add_none_format(tree, hf_mcc_types, tvb, start_offset, offset - start_offset, "Type: %s (0x%x), C/R flag = %d, E/A flag = %d", val_to_str_const(mcc_type, vs_ctl, "Unknown"), mcc_type, mcc_cr_flag, mcc_ea_flag); mcc_tree = proto_item_add_subtree(ti, ett_mcc); proto_tree_add_item(mcc_tree, hf_mcc_cmd, tvb, start_offset, offset - start_offset, ENC_LITTLE_ENDIAN); proto_tree_add_item(mcc_tree, hf_mcc_cr, tvb, start_offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(mcc_tree, hf_mcc_ea, tvb, start_offset, 1, ENC_LITTLE_ENDIAN); return offset; } static gint dissect_btrfcomm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { proto_item *ti; proto_tree *rfcomm_tree; gint offset = 0; gint fcs_offset; guint8 dlci, cr_flag, ea_flag; guint8 frame_type, pf_flag; guint16 frame_len; btl2cap_data_t *l2cap_data; service_info_t *service_info = NULL; /* Reject the packet if data is NULL */ if (data == NULL) return 0; l2cap_data = (btl2cap_data_t *) data; ti = proto_tree_add_item(tree, proto_btrfcomm, tvb, offset, tvb_captured_length(tvb), ENC_NA); rfcomm_tree = proto_item_add_subtree(ti, ett_btrfcomm); col_set_str(pinfo->cinfo, COL_PROTOCOL, "RFCOMM"); 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; } /* flags and dlci */ offset = dissect_btrfcomm_address(tvb, pinfo, offset, rfcomm_tree, &ea_flag, &cr_flag, &dlci); /* pf and frame type */ offset = dissect_btrfcomm_control(tvb, offset, rfcomm_tree, &pf_flag, &frame_type); /* payload length */ offset = dissect_btrfcomm_payload_length(tvb, offset, rfcomm_tree, &frame_len); if (dlci && (frame_len || (frame_type == FRAME_TYPE_UIH) || (frame_type == FRAME_TYPE_SABM))) { wmem_tree_key_t key[10]; guint32 k_interface_id; guint32 k_adapter_id; guint32 k_psm; guint32 k_direction; guint32 k_bd_addr_oui; guint32 k_bd_addr_id; guint32 k_service_type; guint32 k_frame_number; guint32 k_chandle; guint32 k_channel; guint32 k_dlci; service_direction_t *service_direction; wmem_tree_t *subtree; k_interface_id = l2cap_data->interface_id; k_adapter_id = l2cap_data->adapter_id; k_chandle = l2cap_data->chandle; k_psm = l2cap_data->psm; k_channel = dlci >> 1; k_frame_number = pinfo->num; k_dlci = dlci; 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_psm; key[4].length = 1; key[4].key = &k_dlci; if (!pinfo->fd->flags.visited && frame_type == FRAME_TYPE_SABM) { key[5].length = 0; key[5].key = NULL; subtree = (wmem_tree_t *) wmem_tree_lookup32_array(service_directions, key); service_direction = (subtree) ? (service_direction_t *) wmem_tree_lookup32_le(subtree, k_frame_number) : NULL; if (service_direction && service_direction->end_in == max_disconnect_in_frame) { service_direction->end_in = k_frame_number; } key[5].length = 1; key[5].key = &k_frame_number; key[6].length = 0; key[6].key = NULL; service_direction = wmem_new(wmem_file_scope(), service_direction_t); service_direction->direction = (pinfo->p2p_dir == P2P_DIR_RECV) ? P2P_DIR_SENT : P2P_DIR_RECV; service_direction->end_in = max_disconnect_in_frame; wmem_tree_insert32_array(service_directions, key, service_direction); } key[4].key = &k_channel; key[5].length = 0; key[5].key = NULL; subtree = (wmem_tree_t *) wmem_tree_lookup32_array(service_directions, key); service_direction = (subtree) ? (service_direction_t *) wmem_tree_lookup32_le(subtree, k_frame_number) : NULL; if (service_direction && service_direction->end_in > k_frame_number) { k_direction = service_direction->direction; } else { if (dlci & 0x01) k_direction = (l2cap_data->is_local_psm) ? P2P_DIR_RECV : P2P_DIR_SENT; else k_direction = (l2cap_data->is_local_psm) ? P2P_DIR_SENT : P2P_DIR_RECV; } k_psm = SDP_PSM_DEFAULT; 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; } k_service_type = BTSDP_RFCOMM_PROTOCOL_UUID; key[2].length = 1; key[2].key = &k_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_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 == l2cap_data->interface_id && service_info->adapter_id == l2cap_data->adapter_id && service_info->sdp_psm == SDP_PSM_DEFAULT && ((service_info->direction == P2P_DIR_RECV && service_info->bd_addr_oui == l2cap_data->remote_bd_addr_oui && service_info->bd_addr_id == l2cap_data->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_RFCOMM_PROTOCOL_UUID && service_info->channel == (dlci >> 1)) { } else { service_info = wmem_new0(wmem_packet_scope(), service_info_t); } } col_append_fstr(pinfo->cinfo, COL_INFO, "%s Channel=%u ", val_to_str_const(frame_type, vs_frame_type_short, "Unknown"), dlci >> 1); if (dlci && (frame_type == FRAME_TYPE_SABM) && service_info) { if (service_info->uuid.size==16) col_append_fstr(pinfo->cinfo, COL_INFO, "(UUID128: %s) ", print_uuid(&service_info->uuid)); else col_append_fstr(pinfo->cinfo, COL_INFO, "(%s) ", val_to_str_ext_const(service_info->uuid.bt_uuid, &bluetooth_uuid_vals_ext, "Unknown")); } /* UID frame */ if ((frame_type == FRAME_TYPE_UIH) && dlci && pf_flag) { col_append_str(pinfo->cinfo, COL_INFO, "UID "); /* add credit based flow control byte */ proto_tree_add_item(rfcomm_tree, hf_fc_credits, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset += 1; } fcs_offset = offset + frame_len; /* multiplexer control command */ if (!dlci && frame_len) { proto_item *mcc_ti; proto_tree *ctrl_tree; proto_tree *dlci_tree; proto_item *dlci_item; guint32 mcc_type, length; guint8 mcc_cr_flag, mcc_ea_flag; guint8 mcc_channel; guint8 mcc_dlci; int start_offset = offset; mcc_ti = proto_tree_add_item(rfcomm_tree, hf_mcc, tvb, offset, 1, ENC_NA); ctrl_tree = proto_item_add_subtree(mcc_ti, ett_btrfcomm_ctrl); /* mcc type */ offset = dissect_btrfcomm_MccType(tvb, offset, ctrl_tree, &mcc_cr_flag, &mcc_ea_flag, &mcc_type); /* len */ offset = get_le_multi_byte_value(tvb, offset, ctrl_tree, &length, hf_mcc_len); if (length > (guint32) tvb_reported_length_remaining(tvb, offset)) { expert_add_info_format(pinfo, ctrl_tree, &ei_btrfcomm_mcc_length_bad, "Huge MCC length: %u", length); return offset; } switch(mcc_type) { case 0x20: /* DLC Parameter Negotiation */ dissect_ctrl_pn(ctrl_tree, tvb, offset, &mcc_channel); break; case 0x24: /* Remote Port Negotiation */ mcc_dlci = tvb_get_guint8(tvb, offset) >> 2; mcc_channel = mcc_dlci >> 1; dlci_item = proto_tree_add_item(ctrl_tree, hf_mcc_dlci, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_item_append_text(dlci_item, " (Direction: %d, Channel: %u)", mcc_dlci & 0x01, mcc_channel); dlci_tree = proto_item_add_subtree(dlci_item, ett_mcc_dlci); proto_tree_add_item(dlci_tree, hf_mcc_channel, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(dlci_tree, hf_mcc_direction, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(ctrl_tree, hf_mcc_const_1, tvb, offset, 1, ENC_LITTLE_ENDIAN); proto_tree_add_item(ctrl_tree, hf_mcc_ea, tvb, offset, 1, ENC_LITTLE_ENDIAN); break; case 0x38: /* Modem Status Command */ dissect_ctrl_msc(ctrl_tree, tvb, offset, length, &mcc_channel); break; default: mcc_channel = -1; } if (mcc_channel > 0) { col_append_fstr(pinfo->cinfo, COL_INFO, "-> %d ", mcc_channel); } col_append_str(pinfo->cinfo, COL_INFO, "MPX_CTRL "); if(mcc_type){ col_append_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(mcc_type, vs_ctl, "Unknown")); } offset += length; proto_item_set_len(mcc_ti, offset - start_offset); } /* try to find a higher layer dissector that has registered to handle data * for this kind of service, if none is found dissect it as raw "data" */ if (dlci && frame_len) { dissector_handle_t decode_by_dissector; tvbuff_t *next_tvb; btrfcomm_data_t *rfcomm_data; next_tvb = tvb_new_subset_length(tvb, offset, frame_len); rfcomm_data = (btrfcomm_data_t *) wmem_new(wmem_packet_scope(), btrfcomm_data_t); rfcomm_data->interface_id = l2cap_data->interface_id; rfcomm_data->adapter_id = l2cap_data->adapter_id; rfcomm_data->chandle = l2cap_data->chandle; rfcomm_data->cid = l2cap_data->cid; rfcomm_data->is_local_psm = l2cap_data->is_local_psm; rfcomm_data->dlci = dlci; rfcomm_data->remote_bd_addr_oui = l2cap_data->remote_bd_addr_oui; rfcomm_data->remote_bd_addr_id = l2cap_data->remote_bd_addr_id; if (service_info && service_info->uuid.size != 0 && p_get_proto_data(pinfo->pool, pinfo, proto_bluetooth, PROTO_DATA_BLUETOOTH_SERVICE_UUID) == NULL) { guint8 *value_data; value_data = wmem_strdup(wmem_file_scope(), print_numeric_uuid(&service_info->uuid)); p_add_proto_data(pinfo->pool, pinfo, proto_bluetooth, PROTO_DATA_BLUETOOTH_SERVICE_UUID, value_data); } if (!dissector_try_uint_new(rfcomm_dlci_dissector_table, (guint32) dlci, next_tvb, pinfo, tree, TRUE, rfcomm_data)) { if (service_info && (service_info->uuid.size == 0 || !dissector_try_string(bluetooth_uuid_table, print_numeric_uuid(&service_info->uuid), next_tvb, pinfo, tree, rfcomm_data))) { decode_by_dissector = find_proto_by_channel(dlci >> 1); if (rfcomm_channels_enabled && decode_by_dissector) { call_dissector_with_data(decode_by_dissector, next_tvb, pinfo, tree, rfcomm_data); } else { /* unknown service, let the data dissector handle it */ call_data_dissector(next_tvb, pinfo, tree); } } } } proto_tree_add_item(rfcomm_tree, hf_fcs, tvb, fcs_offset, 1, ENC_LITTLE_ENDIAN); offset += 1; return offset; } void proto_register_btrfcomm(void) { module_t *module; expert_module_t *expert_btrfcomm; static hf_register_info hf[] = { { &hf_dlci, { "DLCI", "btrfcomm.dlci", FT_UINT8, BASE_HEX, NULL, 0xFC, "RFCOMM Data Link Connection Identifier", HFILL} }, { &hf_channel, { "Channel", "btrfcomm.channel", FT_UINT8, BASE_DEC, NULL, 0xF8, "RFCOMM Channel", HFILL} }, { &hf_direction, {"Direction", "btrfcomm.direction", FT_UINT8, BASE_HEX, NULL, 0x04, NULL, HFILL} }, { &hf_priority, { "Priority", "btrfcomm.priority", FT_UINT8, BASE_DEC, NULL, 0x3f, NULL, HFILL} }, { &hf_max_frame_size, { "Max Frame Size", "btrfcomm.max_frame_size", FT_UINT16, BASE_DEC, NULL, 0, "Maximum Frame Size", HFILL} }, { &hf_max_retrans, { "Maximum number of retransmissions", "btrfcomm.max_retrans", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL} }, { &hf_error_recovery_mode, { "Error Recovery Mode", "btrfcomm.error_recovery_mode", FT_UINT8, BASE_DEC, NULL, 0x07, NULL, HFILL} }, { &hf_ea, { "EA Flag", "btrfcomm.ea", FT_UINT8, BASE_HEX, VALS(vs_ea), 0x01, "EA flag (should be always 1)", HFILL} }, { &hf_cr, { "C/R Flag", "btrfcomm.cr", FT_UINT8, BASE_HEX, VALS(vs_cr), 0x02, "Command/Response flag", HFILL} }, { &hf_mcc, { "Multiplexer Control Command", "btrfcomm.mcc", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL} }, { &hf_mcc_pn_parameters, { "Parameters", "btrfcomm.mcc.pn_parameters", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL} }, { &hf_mcc_types, { "Types", "btrfcomm.mcc.types", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL} }, { &hf_mcc_ea, { "EA Flag", "btrfcomm.mcc.ea", FT_UINT8, BASE_HEX, VALS(vs_ea), 0x01, "RFCOMM MCC EA flag", HFILL} }, { &hf_mcc_cr, { "C/R Flag", "btrfcomm.mcc.cr", FT_UINT8, BASE_HEX, VALS(vs_cr), 0x02, "Command/Response flag", HFILL} }, { &hf_mcc_const_1, { "Ones padding", "btrfcomm.mcc.padding", FT_UINT8, BASE_HEX, NULL, 0x02, NULL, HFILL} }, { &hf_mcc_dlci, { "MCC DLCI", "btrfcomm.mcc.dlci", FT_UINT8, BASE_HEX, NULL, 0xFC, "RFCOMM MCC Data Link Connection Identifier", HFILL} }, { &hf_mcc_channel, { "MCC Channel", "btrfcomm.mcc.channel", FT_UINT8, BASE_DEC, NULL, 0xF8, "RFCOMM MCC Channel", HFILL} }, { &hf_mcc_direction, { "MCC Direction", "btrfcomm.mcc.direction", FT_UINT8, BASE_HEX, NULL, 0x04, "RFCOMM MCC Direction", HFILL} }, { &hf_mcc_pn_dlci, { "MCC DLCI", "btrfcomm.mcc.dlci", FT_UINT8, BASE_HEX, NULL, 0x3F, "RFCOMM MCC Data Link Connection Identifier", HFILL} }, { &hf_mcc_pn_channel, { "MCC Channel", "btrfcomm.mcc.channel", FT_UINT8, BASE_DEC, NULL, 0x3E, "RFCOMM MCC Channel", HFILL} }, { &hf_mcc_pn_direction, { "MCC Direction", "btrfcomm.mcc.direction", FT_UINT8, BASE_HEX, NULL, 0x01, "RFCOMM MCC Direction", HFILL} }, { &hf_mcc_pn_zeros_padding, { "Zeros padding", "btrfcomm.mcc.padding", FT_UINT8, BASE_HEX, NULL, 0xC0, "RFCOMM MSC Zeros padding", HFILL} }, { &hf_mcc_cmd, { "MCC Command Type", "btrfcomm.mcc.cmd", FT_UINT8, BASE_HEX, VALS(vs_ctl), 0xFC, "Command Type", HFILL} }, { &hf_frame_type, { "Frame type", "btrfcomm.frame_type", FT_UINT8, BASE_HEX, VALS(vs_frame_type), 0xEF, "Command/Response flag", HFILL} }, { &hf_acknowledgement_timer_t1, { "Acknowledgement Timer T1", "btrfcomm.acknowledgement_timer_t1", FT_UINT8, BASE_DEC, NULL, 0x00, NULL, HFILL} }, { &hf_pf, { "P/F flag", "btrfcomm.pf", FT_UINT8, BASE_HEX, NULL, 0x10, "Poll/Final bit", HFILL} }, { &hf_pn_i14, { "Type of frame", "btrfcomm.pn.i", FT_UINT8, BASE_HEX, VALS(vs_ctl_pn_i), 0x0F, "Type of information frames used for that particular DLCI", HFILL} }, { &hf_pn_c14, { "Convergence layer", "btrfcomm.pn.cl", FT_UINT8, BASE_HEX, VALS(vs_ctl_pn_cl), 0xF0, "Convergence layer used for that particular DLCI", HFILL} }, { &hf_len, { "Payload length", "btrfcomm.len", FT_UINT16, BASE_DEC, NULL, 0, "Frame length", HFILL} }, { &hf_mcc_len, { "MCC Length", "btrfcomm.mcc.len", FT_UINT16, BASE_DEC, NULL, 0, "Length of MCC data", HFILL} }, { &hf_fcs, { "Frame Check Sequence", "btrfcomm.fcs", FT_UINT8, BASE_HEX, NULL, 0, "Checksum over frame", HFILL} }, { &hf_msc_parameters, { "Parameters", "btrfcomm.mcc.msc_parameters", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL} }, { &hf_msc_fc, { "Flow Control (FC)", "btrfcomm.msc.fc", FT_UINT8, BASE_HEX, NULL, 0x02, "Flow Control", HFILL} }, { &hf_msc_rtc, { "Ready To Communicate (RTC)", "btrfcomm.msc.rtc", FT_UINT8, BASE_HEX, NULL, 0x04, "Ready To Communicate", HFILL} }, { &hf_msc_rtr, { "Ready To Receive (RTR)", "btrfcomm.msc.rtr", FT_UINT8, BASE_HEX, NULL, 0x08, "Ready To Receive", HFILL} }, { &hf_msc_ic, { "Incoming Call Indicator (IC)", "btrfcomm.msc.ic", FT_UINT8, BASE_HEX, NULL, 0x40, "Incoming Call Indicator", HFILL} }, { &hf_msc_dv, { "Data Valid (DV)", "btrfcomm.msc.dv", FT_UINT8, BASE_HEX, NULL, 0x80, "Data Valid", HFILL} }, { &hf_msc_l, { "Length of break in units of 200ms", "btrfcomm.msc.bl", FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL} }, { &hf_msc_break_bits, { "Break Bits", "btrfcomm.msc.break_bits", FT_UINT8, BASE_DEC, NULL, 0xE0, NULL, HFILL} }, { &hf_address, { "Address", "btrfcomm.address", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL} }, { &hf_control, { "Control", "btrfcomm.control", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL} }, { &hf_fc_credits, { "Credits", "btrfcomm.credits", FT_UINT8, BASE_DEC, NULL, 0, "Flow control: number of UIH frames allowed to send", HFILL} } }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_btrfcomm, &ett_btrfcomm_ctrl, &ett_addr, &ett_control, &ett_mcc, &ett_ctrl_pn_ci, &ett_ctrl_pn_v24, &ett_dlci, &ett_mcc_dlci }; static ei_register_info ei[] = { { &ei_btrfcomm_mcc_length_bad, { "btrfcomm.mcc_length_bad", PI_MALFORMED, PI_ERROR, "Huge MCC length", EXPFILL }}, }; /* Decode As handling */ static build_valid_func btrfcomm_directed_channel_da_build_value[1] = {btrfcomm_directed_channel_value}; static decode_as_value_t btrfcomm_directed_channel_da_values = {btrfcomm_directed_channel_prompt, 1, btrfcomm_directed_channel_da_build_value}; static decode_as_t btrfcomm_directed_channel_da = {"btrfcomm", "RFCOMM Directed Channel", "btrfcomm.dlci", 1, 0, &btrfcomm_directed_channel_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_btrfcomm = proto_register_protocol("Bluetooth RFCOMM Protocol", "BT RFCOMM", "btrfcomm"); btrfcomm_handle = register_dissector("btrfcomm", dissect_btrfcomm, proto_btrfcomm); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_btrfcomm, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); expert_btrfcomm = expert_register_protocol(proto_btrfcomm); expert_register_field_array(expert_btrfcomm, ei, array_length(ei)); service_directions = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope()); rfcomm_dlci_dissector_table = register_dissector_table("btrfcomm.dlci", "BT RFCOMM Directed Channel", proto_btrfcomm, FT_UINT16, BASE_DEC); module = prefs_register_protocol(proto_btrfcomm, NULL); prefs_register_static_text_preference(module, "rfcomm.version", "Bluetooth Protocol RFCOMM version: 1.1", "Version of protocol supported by this dissector."); prefs_register_bool_preference(module, "rfcomm.decode_by.enabled", "Enable Force Decode by Channel", "Turn on/off decode by next rules", &rfcomm_channels_enabled); uat_rfcomm_channels = uat_new("Force Decode by Channel", sizeof(uat_rfcomm_channels_t), "rfcomm_channels", TRUE, &rfcomm_channels, &num_rfcomm_channels, UAT_AFFECTS_DISSECTION, NULL, NULL, NULL, NULL, NULL, uat_rfcomm_channels_fields); prefs_register_uat_preference(module, "rfcomm.channels", "Force Decode by channel", "Decode by channel", uat_rfcomm_channels); register_decode_as(&btrfcomm_directed_channel_da); } void proto_reg_handoff_btrfcomm(void) { dissector_add_uint("btl2cap.psm", BTL2CAP_PSM_RFCOMM, btrfcomm_handle); dissector_add_for_decode_as("btl2cap.cid", btrfcomm_handle); } /* Bluetooth Dial-Up Networking (DUN) profile dissection */ static gint dissect_btdun(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { proto_item *ti; proto_tree *st; gboolean is_at_cmd; guint i, length; length = tvb_captured_length(tvb); col_set_str(pinfo->cinfo, COL_PROTOCOL, "DUN"); ti = proto_tree_add_item(tree, proto_btdun, tvb, 0, tvb_captured_length(tvb), ENC_NA); st = proto_item_add_subtree(ti, ett_btdun); is_at_cmd = TRUE; for(i = 0; i < length && is_at_cmd; i++) { is_at_cmd = tvb_get_guint8(tvb, i) < 0x7d; } if (is_at_cmd) { /* presumably an AT command */ col_add_fstr(pinfo->cinfo, COL_INFO, "%s \"%s\"", (pinfo->p2p_dir == P2P_DIR_SENT) ? "Sent" : "Rcvd", tvb_format_text(tvb, 0, length)); proto_tree_add_item(st, hf_dun_at_cmd, tvb, 0, tvb_reported_length(tvb), ENC_ASCII|ENC_NA); } else { /* ... or raw PPP */ if (ppp_handle) call_dissector(ppp_handle, tvb, pinfo, tree); else { /* TODO: remove the above 'if' and this 'else-body' when "ppp_raw_hdlc" is available, requires that it is made non-anonymous in ppp dissector to use */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPP"); col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", (pinfo->p2p_dir == P2P_DIR_SENT) ? "Sent" : "Rcvd"); call_data_dissector(tvb, pinfo, tree); } } return tvb_reported_length(tvb); } void proto_register_btdun(void) { static hf_register_info hf[] = { { &hf_dun_at_cmd, { "AT Cmd", "btdun.atcmd", FT_STRING, BASE_NONE, NULL, 0, "AT Command", HFILL} }, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_btdun }; proto_btdun = proto_register_protocol("Bluetooth DUN Packet", "BT DUN", "btdun"); btdun_handle = register_dissector("btdun", dissect_btdun, proto_btdun); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_btdun, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } void proto_reg_handoff_btdun(void) { dissector_add_string("bluetooth.uuid", "1103", btdun_handle); dissector_add_for_decode_as("btrfcomm.dlci", btdun_handle); ppp_handle = find_dissector_add_dependency("ppp_raw_hdlc", proto_btdun); } /* Bluetooth Serial Port profile (SPP) dissection */ static gint dissect_btspp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { proto_item *ti; proto_tree *st; gboolean ascii_only; guint i; guint length = tvb_captured_length(tvb); col_set_str(pinfo->cinfo, COL_PROTOCOL, "SPP"); ti = proto_tree_add_item(tree, proto_btspp, tvb, 0, tvb_captured_length(tvb), ENC_NA); st = proto_item_add_subtree(ti, ett_btspp); length = MIN(length, 60); ascii_only = TRUE; for(i = 0; i < length && ascii_only; i++) { ascii_only = tvb_get_guint8(tvb, i) < 0x80; } if (ascii_only) { col_add_fstr(pinfo->cinfo, COL_INFO, "%s \"%s%s\"", (pinfo->p2p_dir == P2P_DIR_SENT) ? "Sent" : "Rcvd", tvb_format_text(tvb, 0, length), (tvb_captured_length(tvb) > length) ? "..." : ""); } proto_tree_add_item(st, hf_spp_data, tvb, 0, tvb_reported_length(tvb), ENC_NA); return tvb_reported_length(tvb); } void proto_register_btspp(void) { static hf_register_info hf[] = { { &hf_spp_data, { "Data", "btspp.data", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL } }, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_btspp }; proto_btspp = proto_register_protocol("Bluetooth SPP Packet", "BT SPP", "btspp"); btspp_handle = register_dissector("btspp", dissect_btspp, proto_btspp); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_btspp, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } void proto_reg_handoff_btspp(void) { dissector_add_string("bluetooth.uuid", "1101", btspp_handle); dissector_add_for_decode_as("btrfcomm.dlci", btspp_handle); } /* Bluetooth Global Navigation Satellite System profile (GNSS) dissection */ static gint dissect_btgnss(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { proto_item *main_item; proto_tree *main_tree; col_set_str(pinfo->cinfo, COL_PROTOCOL, "GNSS"); main_item = proto_tree_add_item(tree, proto_btgnss, tvb, 0, tvb_captured_length(tvb), ENC_NA); main_tree = proto_item_add_subtree(main_item, ett_btgnss); col_add_fstr(pinfo->cinfo, COL_INFO, "%s %s", (pinfo->p2p_dir == P2P_DIR_SENT) ? "Sent" : "Rcvd", tvb_format_text(tvb, 0, tvb_captured_length(tvb))); /* GNSS using NMEA-0183 protocol, but it is not available */ proto_tree_add_item(main_tree, hf_gnss_data, tvb, 0, tvb_reported_length(tvb), ENC_NA | ENC_ASCII); return tvb_reported_length(tvb); } void proto_register_btgnss(void) { static hf_register_info hf[] = { { &hf_gnss_data, { "Data", "btgnss.data", FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL } }, }; static gint *ett[] = { &ett_btgnss }; proto_btgnss = proto_register_protocol("Bluetooth GNSS Profile", "BT GNSS", "btgnss"); btgnss_handle = register_dissector("btgnss", dissect_btgnss, proto_btgnss); proto_register_field_array(proto_btgnss, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } void proto_reg_handoff_btgnss(void) { dissector_add_string("bluetooth.uuid", "1135", btgnss_handle); dissector_add_string("bluetooth.uuid", "1136", btgnss_handle); dissector_add_for_decode_as("btrfcomm.dlci", btgnss_handle); } /* * Editor modelines - http://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 4 * tab-width: 8 * indent-tabs-mode: nil * End: * * vi: set shiftwidth=4 tabstop=8 expandtab: * :indentSize=4:tabSize=8:noTabs=true: */