diff options
author | Michal Labedzki <michal.labedzki@tieto.com> | 2014-08-22 15:33:17 +0200 |
---|---|---|
committer | Evan Huus <eapache@gmail.com> | 2014-09-20 18:18:06 +0000 |
commit | 846a9332ed704ecfd5f5ad29409450a1220190b0 (patch) | |
tree | 605736c92e629d8955d951f1a645a1b35d8206dc /epan/dissectors | |
parent | 3623fce79b242b8313d40536080f568421a0f7a0 (diff) |
Bluetooth: HCI: Add support for user/vendor commands
Some Vendors can provide own subset of HCI commands/events, so provide them
possibility to write own dissectors and use them by "Decode As".
Change-Id: I87ff60ae12ac63ddd4b12b26951aa9f5143eabc6
Reviewed-on: https://code.wireshark.org/review/4166
Petri-Dish: Michal Labedzki <michal.labedzki@tieto.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Reviewed-by: Evan Huus <eapache@gmail.com>
Diffstat (limited to 'epan/dissectors')
-rw-r--r-- | epan/dissectors/packet-bluetooth-hci.h | 2 | ||||
-rw-r--r-- | epan/dissectors/packet-bthci_cmd.c | 43 | ||||
-rw-r--r-- | epan/dissectors/packet-bthci_evt.c | 70 |
3 files changed, 102 insertions, 13 deletions
diff --git a/epan/dissectors/packet-bluetooth-hci.h b/epan/dissectors/packet-bluetooth-hci.h index ded3d8eb66..837fcd9ef5 100644 --- a/epan/dissectors/packet-bluetooth-hci.h +++ b/epan/dissectors/packet-bluetooth-hci.h @@ -39,6 +39,8 @@ #define HCI_OGF_LOGO_TESTING 0x3e #define HCI_OGF_VENDOR_SPECIFIC 0x3f +#define HCI_VENDOR_DEFAULT 0 + #define DID_VENDOR_ID_SOURCE_BLUETOOTH_SIG 1 #define DID_VENDOR_ID_SOURCE_USB_FORUM 2 diff --git a/epan/dissectors/packet-bthci_cmd.c b/epan/dissectors/packet-bthci_cmd.c index 835a616a92..86d5da6d18 100644 --- a/epan/dissectors/packet-bthci_cmd.c +++ b/epan/dissectors/packet-bthci_cmd.c @@ -36,6 +36,7 @@ #include <epan/addr_resolv.h> #include <epan/expert.h> #include <epan/prefs.h> +#include <epan/decode_as.h> #include "packet-bluetooth-hci.h" #include "packet-btsdp.h" @@ -322,11 +323,14 @@ static int hf_bthci_cmd_rx_freqency = -1; static int hf_bthci_cmd_tx_freqency = -1; static int hf_bthci_cmd_test_data_length = -1; static int hf_bthci_cmd_test_packet_payload = -1; +static int hf_bthci_cmd_parameter = -1; static expert_field ei_command_undecoded = EI_INIT; static expert_field ei_command_unknown = EI_INIT; static expert_field ei_command_parameter_unexpected = EI_INIT; +static dissector_table_t vendor_dissector_table; + /* Initialize the subtree pointers */ static gint ett_bthci_cmd = -1; static gint ett_opcode = -1; @@ -1787,6 +1791,16 @@ void proto_register_bthci_cmd(void); void proto_reg_handoff_bthci_cmd(void); void proto_register_btcommon(void); +static void bthci_cmd_vendor_prompt(packet_info *pinfo _U_, gchar* result) +{ + g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Vendor as"); +} + +static gpointer bthci_cmd_vendor_value(packet_info *pinfo _U_) +{ + return NULL; +} + static void save_local_device_name(tvbuff_t *tvb, gint offset, packet_info *pinfo, guint8 size, hci_data_t *hci_data) @@ -3371,8 +3385,6 @@ dissect_bthci_cmd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *dat col_set_str(pinfo->cinfo, COL_PROTOCOL, "HCI_CMD"); - col_append_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str_ext(opcode, &bthci_cmd_opcode_vals_ext, "Unknown 0x%04x")); - ti_opcode = proto_tree_add_item(bthci_cmd_tree, hf_bthci_cmd_opcode, tvb, offset, 2, ENC_LITTLE_ENDIAN); opcode_tree = proto_item_add_subtree(ti_opcode, ett_opcode); proto_tree_add_item(opcode_tree, hf_bthci_cmd_ogf, tvb, offset, 2, ENC_LITTLE_ENDIAN); @@ -3403,6 +3415,18 @@ dissect_bthci_cmd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *dat param_length = tvb_get_guint8(tvb, offset); offset++; + if (ogf == HCI_OGF_VENDOR_SPECIFIC) { + col_append_fstr(pinfo->cinfo, COL_INFO, "Vendor Command 0x%04X (opcode 0x%04X)", ocf, opcode); + + dissector_try_uint_new(vendor_dissector_table, HCI_VENDOR_DEFAULT, tvb, pinfo, tree, TRUE, hci_data); + + proto_tree_add_item(bthci_cmd_tree, hf_bthci_cmd_parameter, tvb, offset, tvb_captured_length_remaining(tvb, offset), ENC_NA); + + return tvb_captured_length(tvb); + } else { + col_append_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str_ext(opcode, &bthci_cmd_opcode_vals_ext, "Unknown 0x%04x")); + } + if (param_length > 0) { switch (ogf) { case HCI_OGF_LINK_CONTROL: @@ -4867,6 +4891,11 @@ proto_register_bthci_cmd(void) FT_UINT8, BASE_HEX, VALS(cmd_le_test_pkt_payload), 0x0, NULL, HFILL } }, + { &hf_bthci_cmd_parameter, + { "Parameter", "bthci_cmd.parameter", + FT_NONE, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, }; static ei_register_info ei[] = { @@ -4884,6 +4913,12 @@ proto_register_bthci_cmd(void) &ett_le_channel_map }; + /* Decode As handling */ + static build_valid_func bthci_cmd_vendor_da_build_value[1] = {bthci_cmd_vendor_value}; + static decode_as_value_t bthci_cmd_vendor_da_values = {bthci_cmd_vendor_prompt, 1, bthci_cmd_vendor_da_build_value}; + static decode_as_t bthci_cmd_vendor_da = {"bthci_evt", "Vendor", "bthci_cmd.vendor", 1, 0, &bthci_cmd_vendor_da_values, NULL, NULL, + decode_as_default_populate_list, decode_as_default_reset, decode_as_default_change, NULL}; + /* Dynamically fill "bthci_cmd_opcode_vals" */ static const struct _opcode_value_string_arrays { guint ogf; @@ -4920,10 +4955,14 @@ proto_register_bthci_cmd(void) expert_bthci_cmd = expert_register_protocol(proto_bthci_cmd); expert_register_field_array(expert_bthci_cmd, ei, array_length(ei)); + vendor_dissector_table = register_dissector_table("bthci_cmd.vendor", "BT HCI Vendor", FT_UINT16, BASE_HEX); + module = prefs_register_protocol(proto_bthci_cmd, NULL); prefs_register_static_text_preference(module, "hci_cmd.version", "Bluetooth HCI version: 4.0 (Core)", "Version of protocol supported by this dissector."); + + register_decode_as(&bthci_cmd_vendor_da); } diff --git a/epan/dissectors/packet-bthci_evt.c b/epan/dissectors/packet-bthci_evt.c index 4ec1f0730c..dc8667e39b 100644 --- a/epan/dissectors/packet-bthci_evt.c +++ b/epan/dissectors/packet-bthci_evt.c @@ -37,6 +37,7 @@ #include <epan/wmem/wmem.h> #include <epan/expert.h> #include <epan/prefs.h> +#include <epan/decode_as.h> #include "packet-bluetooth-hci.h" #include "packet-sdp.h" @@ -350,6 +351,8 @@ static int hf_usable_packet_types = -1; static expert_field ei_event_undecoded = EI_INIT; static expert_field ei_event_unknown = EI_INIT; +static dissector_table_t vendor_dissector_table; + /* Initialize the subtree pointers */ static gint ett_bthci_evt = -1; static gint ett_opcode = -1; @@ -907,6 +910,16 @@ dissect_bthci_evt_bd_addr(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, return offset; } +static void bthci_evt_vendor_prompt(packet_info *pinfo _U_, gchar* result) +{ + g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Vendor as"); +} + +static gpointer bthci_evt_vendor_value(packet_info *pinfo _U_) +{ + return NULL; +} + static void save_remote_device_name(tvbuff_t *tvb, gint offset, packet_info *pinfo, guint8 size, guint8 *bd_addr, hci_data_t *hci_data) @@ -1562,7 +1575,7 @@ dissect_bthci_evt_conn_packet_type_changed(tvbuff_t *tvb, int offset, packet_inf } static int -dissect_bthci_evt_command_status(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree) +dissect_bthci_evt_command_status(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *main_tree, proto_tree *tree, hci_data_t *hci_data) { proto_item *ti_opcode; proto_tree *opcode_tree; @@ -1612,8 +1625,16 @@ dissect_bthci_evt_command_status(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree_add_item(opcode_tree, hfx, tvb, offset, 2, ENC_LITTLE_ENDIAN); offset += 2; - col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", - val_to_str_ext(opcode, &bthci_cmd_opcode_vals_ext, "Unknown 0x%08x")); + if (ogf == HCI_OGF_VENDOR_SPECIFIC) { + col_append_fstr(pinfo->cinfo, COL_INFO, " (Vendor Command 0x%04X [(opcode 0x%04X])", opcode & 0x03ff, opcode); + + dissector_try_uint_new(vendor_dissector_table, HCI_VENDOR_DEFAULT, tvb, pinfo, main_tree, TRUE, hci_data); + + return tvb_captured_length(tvb); + } else { + col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", + val_to_str_ext(opcode, &bthci_cmd_opcode_vals_ext, "Unknown 0x%04x")); + } return offset; } @@ -2024,7 +2045,7 @@ dissect_bthci_evt_amp_status_change(tvbuff_t *tvb, int offset, packet_info *pinf static int dissect_bthci_evt_command_complete(tvbuff_t *tvb, int offset, - packet_info *pinfo, proto_tree *tree, hci_data_t *hci_data) + packet_info *pinfo, proto_tree *main_tree, proto_tree *tree, hci_data_t *hci_data) { proto_item *ti_opcode; proto_tree *opcode_tree; @@ -2070,8 +2091,18 @@ dissect_bthci_evt_command_complete(tvbuff_t *tvb, int offset, proto_tree_add_item(opcode_tree, hfx, tvb, offset, 2, ENC_LITTLE_ENDIAN); offset += 2; - col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", - val_to_str_ext(opcode, &bthci_cmd_opcode_vals_ext, "Unknown 0x%08x")); + if (ogf == HCI_OGF_VENDOR_SPECIFIC) { + col_append_fstr(pinfo->cinfo, COL_INFO, " (Vendor Command 0x%04X [opcode 0x%04X])", opcode & 0x03ff, opcode); + + dissector_try_uint_new(vendor_dissector_table, HCI_VENDOR_DEFAULT, tvb, pinfo, main_tree, TRUE, hci_data); + + proto_tree_add_item(tree, hf_bthci_evt_ret_params, tvb, offset, tvb_captured_length_remaining(tvb, offset), ENC_NA); + + return tvb_captured_length(tvb); + } else { + col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", + val_to_str_ext(opcode, &bthci_cmd_opcode_vals_ext, "Unknown 0x%04x")); + } switch(opcode) { /* This is a list of Commands that all return just the status */ @@ -3458,11 +3489,11 @@ dissect_bthci_evt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *dat break; case 0x0e: /* Command Complete */ - offset = dissect_bthci_evt_command_complete(tvb, offset, pinfo, bthci_evt_tree, hci_data); + offset = dissect_bthci_evt_command_complete(tvb, offset, pinfo, tree, bthci_evt_tree, hci_data); break; case 0x0f: /* Command Status */ - offset = dissect_bthci_evt_command_status(tvb, offset, pinfo, bthci_evt_tree); + offset = dissect_bthci_evt_command_status(tvb, offset, pinfo, tree, bthci_evt_tree, hci_data); break; case 0x10: /* Hardware Error */ @@ -3679,14 +3710,20 @@ dissect_bthci_evt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *dat case 0x55: /* Connectionless Slave Broadcast Channel Map Change */ case 0x56: /* Inquiry Response Notification */ case 0xfe: /* Bluetooth Logo Testing */ - case 0xff: /* Vendor-Specific */ /* TODO: Implement above cases */ - proto_tree_add_expert(bthci_evt_tree, pinfo, &ei_event_undecoded, tvb, offset, -1); + proto_tree_add_expert(bthci_evt_tree, pinfo, &ei_event_undecoded, tvb, offset, tvb_captured_length_remaining(tvb, offset)); offset += tvb_length_remaining(tvb, offset); break; + case 0xff: /* Vendor-Specific */ + dissector_try_uint_new(vendor_dissector_table, HCI_VENDOR_DEFAULT, tvb, pinfo, tree, TRUE, hci_data); + + proto_tree_add_expert(bthci_evt_tree, pinfo, &ei_event_undecoded, tvb, offset, tvb_captured_length_remaining(tvb, offset)); + + return tvb_captured_length(tvb); + default: - proto_tree_add_expert(bthci_evt_tree, pinfo, &ei_event_unknown, tvb, offset, -1); + proto_tree_add_expert(bthci_evt_tree, pinfo, &ei_event_unknown, tvb, offset, tvb_captured_length_remaining(tvb, offset)); offset += tvb_length_remaining(tvb, offset); break; } @@ -5206,6 +5243,13 @@ proto_register_bthci_evt(void) &ett_le_channel_map }; + /* Decode As handling */ + static build_valid_func bthci_evt_vendor_da_build_value[1] = {bthci_evt_vendor_value}; + static decode_as_value_t bthci_evt_vendor_da_values = {bthci_evt_vendor_prompt, 1, bthci_evt_vendor_da_build_value}; + static decode_as_t bthci_evt_vendor_da = {"bthci_cmd", "Vendor", "bthci_cmd.vendor", 1, 0, &bthci_evt_vendor_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_bthci_evt = proto_register_protocol("Bluetooth HCI Event", "HCI_EVT", "bthci_evt"); @@ -5222,12 +5266,16 @@ proto_register_bthci_evt(void) prefs_register_static_text_preference(module, "hci_evt.version", "Bluetooth HCI version: 4.0 (Core)", "Version of protocol supported by this dissector."); + + register_decode_as(&bthci_evt_vendor_da); } void proto_reg_handoff_bthci_evt(void) { + vendor_dissector_table = find_dissector_table("bthci_cmd.vendor"); + dissector_add_uint("hci_h4.type", HCI_H4_TYPE_EVT, bthci_evt_handle); dissector_add_uint("hci_h1.type", BTHCI_CHANNEL_EVENT, bthci_evt_handle); |