This adds decoding support for GMCS attributes.
< ACL Data TX: Handle 3585 flags 0x00 dlen 7
ATT: Read Request (0x0a) len 2
Handle: 0x0056 Type: Media Control Point Opcodes Supported (0x2ba5)
> ACL Data RX: Handle 3585 flags 0x02 dlen 9
ATT: Read Response (0x0b) len 4
Value: 33180000
Handle: 0x0056 Type: Media Control Point Opcodes Supported (0x2ba5)
Supported Opcodes: 0x00001833
Play (0x00000001)
Pause (0x00000002)
Stop (0x00000010)
Move Relative (0x00000020)
Previous Track (0x00000800)
Next Track (0x00001000)
---
monitor/att.c | 513 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 513 insertions(+)
diff --git a/monitor/att.c b/monitor/att.c
index f5fc32cb0..e6df496cc 100644
--- a/monitor/att.c
+++ b/monitor/att.c
@@ -14,6 +14,7 @@
#endif
#define _GNU_SOURCE
+#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -22,6 +23,8 @@
#include <errno.h>
#include <linux/limits.h>
+#include <glib.h>
+
#include "lib/bluetooth.h"
#include "lib/uuid.h"
#include "lib/hci.h"
@@ -1746,6 +1749,499 @@ static void vol_flag_notify(const struct l2cap_frame *frame)
print_vcs_flag(frame);
}
+static char *name2utf8(const uint8_t *name, uint16_t len)
+{
+ char utf8_name[HCI_MAX_NAME_LENGTH + 2];
+ int i;
+
+ if (g_utf8_validate((const char *) name, len, NULL))
+ return g_strndup((char *) name, len);
+
+ len = MIN(len, sizeof(utf8_name) - 1);
+
+ memset(utf8_name, 0, sizeof(utf8_name));
+ strncpy(utf8_name, (char *) name, len);
+
+ /* Assume ASCII, and replace all non-ASCII with spaces */
+ for (i = 0; utf8_name[i] != '\0'; i++) {
+ if (!isascii(utf8_name[i]))
+ utf8_name[i] = ' ';
+ }
+
+ /* Remove leading and trailing whitespace characters */
+ g_strstrip(utf8_name);
+
+ return g_strdup(utf8_name);
+}
+
+static void print_mp_name(const struct l2cap_frame *frame)
+{
+ char *name;
+
+ name = name2utf8((uint8_t *)frame->data, frame->size);
+
+ print_field(" Media Player Name: %s", name);
+}
+
+static void mp_name_read(const struct l2cap_frame *frame)
+{
+ print_mp_name(frame);
+}
+
+static void mp_name_notify(const struct l2cap_frame *frame)
+{
+ print_mp_name(frame);
+}
+
+static void print_track_changed(const struct l2cap_frame *frame)
+{
+ print_field(" Track Changed");
+}
+
+static void track_changed_notify(const struct l2cap_frame *frame)
+{
+ print_track_changed(frame);
+}
+
+static void print_track_title(const struct l2cap_frame *frame)
+{
+ char *name;
+
+ name = name2utf8((uint8_t *)frame->data, frame->size);
+
+ print_field(" Track Title: %s", name);
+}
+
+static void track_title_read(const struct l2cap_frame *frame)
+{
+ print_track_title(frame);
+}
+
+static void track_title_notify(const struct l2cap_frame *frame)
+{
+ print_track_title(frame);
+}
+
+static void print_track_duration(const struct l2cap_frame *frame)
+{
+ int32_t duration;
+
+ if (!l2cap_frame_get_le32((void *)frame, (uint32_t *)&duration)) {
+ print_text(COLOR_ERROR, " Track Duration: invalid size");
+ goto done;
+ }
+
+ print_field(" Track Duration: %u", duration);
+
+done:
+ if (frame->size)
+ print_hex_field(" Data", frame->data, frame->size);
+}
+
+static void track_duration_read(const struct l2cap_frame *frame)
+{
+ print_track_duration(frame);
+}
+
+static void track_duration_notify(const struct l2cap_frame *frame)
+{
+ print_track_duration(frame);
+}
+
+static void print_track_position(const struct l2cap_frame *frame)
+{
+ int32_t position;
+
+ if (!l2cap_frame_get_le32((void *)frame, (uint32_t *)&position)) {
+ print_text(COLOR_ERROR, " Track Position: invalid size");
+ goto done;
+ }
+
+ print_field(" Track Position: %u", position);
+
+done:
+ if (frame->size)
+ print_hex_field(" Data", frame->data, frame->size);
+}
+
+static void track_position_read(const struct l2cap_frame *frame)
+{
+ print_track_position(frame);
+}
+
+static void track_position_write(const struct l2cap_frame *frame)
+{
+ print_track_position(frame);
+}
+
+static void track_position_notify(const struct l2cap_frame *frame)
+{
+ print_track_position(frame);
+}
+
+static void print_playback_speed(const struct l2cap_frame *frame)
+{
+ int8_t playback_speed;
+
+ if (!l2cap_frame_get_u8((void *)frame, (uint8_t *)&playback_speed)) {
+ print_text(COLOR_ERROR, " Playback Speed: invalid size");
+ goto done;
+ }
+
+ print_field(" Playback Speed: %u", playback_speed);
+
+done:
+ if (frame->size)
+ print_hex_field(" Data", frame->data, frame->size);
+}
+
+static void playback_speed_read(const struct l2cap_frame *frame)
+{
+ print_playback_speed(frame);
+}
+
+static void playback_speed_write(const struct l2cap_frame *frame)
+{
+ print_playback_speed(frame);
+}
+
+static void playback_speed_notify(const struct l2cap_frame *frame)
+{
+ print_playback_speed(frame);
+}
+
+static void print_seeking_speed(const struct l2cap_frame *frame)
+{
+ int8_t seeking_speed;
+
+ if (!l2cap_frame_get_u8((void *)frame, (uint8_t *)&seeking_speed)) {
+ print_text(COLOR_ERROR, " Seeking Speed: invalid size");
+ goto done;
+ }
+
+ print_field(" Seeking Speed: %u", seeking_speed);
+
+done:
+ if (frame->size)
+ print_hex_field(" Data", frame->data, frame->size);
+}
+
+static void seeking_speed_read(const struct l2cap_frame *frame)
+{
+ print_seeking_speed(frame);
+}
+
+static void seeking_speed_notify(const struct l2cap_frame *frame)
+{
+ print_seeking_speed(frame);
+}
+
+const char *play_order_str(uint8_t order)
+{
+ switch (order) {
+ case 0x01:
+ return "Single once";
+ case 0x02:
+ return "Single repeat";
+ case 0x03:
+ return "In order once";
+ case 0x04:
+ return "In order repeat";
+ case 0x05:
+ return "Oldest once";
+ case 0x06:
+ return "Oldest repeat";
+ case 0x07:
+ return "Newest once";
+ case 0x08:
+ return "Newest repeat";
+ case 0x09:
+ return "Shuffle once";
+ case 0x0A:
+ return "Shuffle repeat";
+ default:
+ return "RFU";
+ }
+}
+
+static void print_playing_order(const struct l2cap_frame *frame)
+{
+ int8_t playing_order;
+
+ if (!l2cap_frame_get_u8((void *)frame, (uint8_t *)&playing_order)) {
+ print_text(COLOR_ERROR, " Playing Order: invalid size");
+ goto done;
+ }
+
+ print_field(" Playing Order: %s", play_order_str(playing_order));
+
+done:
+ if (frame->size)
+ print_hex_field(" Data", frame->data, frame->size);
+}
+
+static void playing_order_read(const struct l2cap_frame *frame)
+{
+ print_playing_order(frame);
+}
+
+static void playing_order_write(const struct l2cap_frame *frame)
+{
+ print_playing_order(frame);
+}
+
+static void playing_order_notify(const struct l2cap_frame *frame)
+{
+ print_playing_order(frame);
+}
+
+static const struct bitfield_data playing_orders_table[] = {
+ { 0, "Single once (0x0001)" },
+ { 1, "Single repeat (0x0002)" },
+ { 2, "In order once (0x0004)" },
+ { 3, "In Order Repeat (0x0008)" },
+ { 4, "Oldest once (0x0010)" },
+ { 5, "Oldest repeat (0x0020)" },
+ { 6, "Newest once (0x0040)" },
+ { 7, "Newest repeat (0x0080)" },
+ { 8, "Shuffle once (0x0100)" },
+ { 9, "Shuffle repeat (0x0200)" },
+ { 10, "RFU (0x0400)" },
+ { 11, "RFU (0x0800)" },
+ { 12, "RFU (0x1000)" },
+ { 13, "RFU (0x2000)" },
+ { 14, "RFU (0x4000)" },
+ { 15, "RFU (0x8000)" },
+ { }
+};
+
+static void print_playing_orders_supported(const struct l2cap_frame *frame)
+{
+ uint16_t supported_orders;
+ uint16_t mask;
+
+ if (!l2cap_frame_get_le16((void *)frame, &supported_orders)) {
+ print_text(COLOR_ERROR,
+ " Supported Playing Orders: invalid size");
+ goto done;
+ }
+
+ print_field(" Supported Playing Orders: 0x%4.4x",
+ supported_orders);
+
+ mask = print_bitfield(8, supported_orders, playing_orders_table);
+ if (mask)
+ print_text(COLOR_WHITE_BG, " Unknown fields (0x%4.4x)",
+ mask);
+
+done:
+ if (frame->size)
+ print_hex_field(" Data", frame->data, frame->size);
+}
+
+static void playing_orders_supported_read(const struct l2cap_frame *frame)
+{
+ print_playing_orders_supported(frame);
+}
+
+const char *media_state_str(uint8_t state)
+{
+ switch (state) {
+ case 0x00:
+ return "Inactive";
+ case 0x01:
+ return "Playing";
+ case 0x02:
+ return "Paused";
+ case 0x03:
+ return "Seeking";
+ default:
+ return "RFU";
+ }
+}
+
+static void print_media_state(const struct l2cap_frame *frame)
+{
+ int8_t state;
+
+ if (!l2cap_frame_get_u8((void *)frame, (uint8_t *)&state)) {
+ print_text(COLOR_ERROR, " Media State: invalid size");
+ goto done;
+ }
+
+ print_field(" Media State: %s", media_state_str(state));
+
+done:
+ if (frame->size)
+ print_hex_field(" Data", frame->data, frame->size);
+}
+
+static void media_state_read(const struct l2cap_frame *frame)
+{
+ print_media_state(frame);
+}
+
+static void media_state_notify(const struct l2cap_frame *frame)
+{
+ print_media_state(frame);
+}
+
+struct media_cp_opcode {
+ uint8_t opcode;
+ const char *opcode_str;
+} media_cp_opcode_table[] = {
+ {0x01, "Play"},
+ {0x02, "Pause"},
+ {0x03, "Fast Rewind"},
+ {0x04, "Fast Forward"},
+ {0x05, "Stop"},
+ {0x10, "Move Relative"},
+ {0x20, "Previous Segment"},
+ {0x21, "Next Segment"},
+ {0x22, "First Segment"},
+ {0x23, "Last Segment"},
+ {0x24, "Goto Segment"},
+ {0x30, "Previous Track"},
+ {0x31, "Next Track"},
+ {0x32, "First Track"},
+ {0x33, "Last Track"},
+ {0x34, "Goto Track"},
+ {0x40, "Previous Group"},
+ {0x41, "Next Group"},
+ {0x42, "First Group"},
+ {0x43, "Last Group"},
+ {0x44, "Goto Group"},
+};
+
+const char *cp_opcode_str(uint8_t opcode)
+{
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(media_cp_opcode_table); i++) {
+ const char *str = media_cp_opcode_table[i].opcode_str;
+
+ if (opcode == media_cp_opcode_table[i].opcode)
+ return str;
+ }
+
+ return "RFU";
+}
+
+static void print_media_cp(const struct l2cap_frame *frame)
+{
+ int8_t opcode;
+
+ if (!l2cap_frame_get_u8((void *)frame, (uint8_t *)&opcode)) {
+ print_text(COLOR_ERROR, " Media Control Point: invalid size");
+ goto done;
+ }
+
+ print_field(" Media Control Point: %s", cp_opcode_str(opcode));
+
+done:
+ if (frame->size)
+ print_hex_field(" Data", frame->data, frame->size);
+}
+
+static void media_cp_write(const struct l2cap_frame *frame)
+{
+ print_media_cp(frame);
+}
+
+static void media_cp_notify(const struct l2cap_frame *frame)
+{
+ print_media_cp(frame);
+}
+
+static const struct bitfield_data supported_opcodes_table[] = {
+ {0, "Play (0x00000001)" },
+ {1, "Pause (0x00000002)" },
+ {2, "Fast Rewind (0x00000004)" },
+ {3, "Fast Forward (0x00000008)" },
+ {4, "Stop (0x00000010)" },
+ {5, "Move Relative (0x00000020)" },
+ {6, "Previous Segment (0x00000040)" },
+ {7, "Next Segment (0x00000080)" },
+ {8, "First Segment (0x00000100)" },
+ {9, "Last Segment (0x00000200)" },
+ {10, "Goto Segment (0x00000400)" },
+ {11, "Previous Track (0x00000800)" },
+ {12, "Next Track (0x00001000)" },
+ {13, "First Track (0x00002000)" },
+ {14, "Last Track (0x00004000)" },
+ {15, "Goto Track (0x00008000)" },
+ {16, "Previous Group (0x00010000)" },
+ {17, "Next Group (0x00020000)" },
+ {18, "First Group (0x00040000)" },
+ {19, "Last Group (0x00080000)" },
+ {20, "Goto Group (0x00100000)" },
+ {21, "RFU (0x00200000)" },
+ {22, "RFU (0x00400000)" },
+ {23, "RFU (0x00800000)" },
+ {24, "RFU (0x01000000)" },
+ {25, "RFU (0x02000000)" },
+ {26, "RFU (0x04000000)" },
+ {27, "RFU (0x08000000)" },
+ {28, "RFU (0x10000000)" },
+ {29, "RFU (0x20000000)" },
+ {30, "RFU (0x40000000)" },
+ {31, "RFU (0x80000000)" },
+ { }
+};
+
+static void print_media_cp_op_supported(const struct l2cap_frame *frame)
+{
+ uint32_t supported_opcodes;
+ uint32_t mask;
+
+ if (!l2cap_frame_get_le32((void *)frame, &supported_opcodes)) {
+ print_text(COLOR_ERROR, " value: invalid size");
+ goto done;
+ }
+
+ print_field(" Supported Opcodes: 0x%8.8x", supported_opcodes);
+
+ mask = print_bitfield(8, supported_opcodes, supported_opcodes_table);
+ if (mask)
+ print_text(COLOR_WHITE_BG, " Unknown fields (0x%4.4x)",
+ mask);
+
+done:
+ if (frame->size)
+ print_hex_field(" Data", frame->data, frame->size);
+}
+
+static void media_cp_op_supported_read(const struct l2cap_frame *frame)
+{
+ print_media_cp_op_supported(frame);
+}
+
+static void media_cp_op_supported_notify(const struct l2cap_frame *frame)
+{
+ print_media_cp_op_supported(frame);
+}
+
+static void print_content_control_id(const struct l2cap_frame *frame)
+{
+ int8_t ccid;
+
+ if (!l2cap_frame_get_u8((void *)frame, (uint8_t *)&ccid)) {
+ print_text(COLOR_ERROR, " Content Control ID: invalid size");
+ goto done;
+ }
+
+ print_field(" Content Control ID: 0x%2.2x", ccid);
+
+done:
+ if (frame->size)
+ print_hex_field(" Data", frame->data, frame->size);
+}
+
+static void content_control_id_read(const struct l2cap_frame *frame)
+{
+ print_content_control_id(frame);
+}
+
#define GATT_HANDLER(_uuid, _read, _write, _notify) \
{ \
.uuid = { \
@@ -1776,6 +2272,23 @@ struct gatt_handler {
GATT_HANDLER(0x2b7d, vol_state_read, NULL, vol_state_notify),
GATT_HANDLER(0x2b7e, NULL, vol_cp_write, NULL),
GATT_HANDLER(0x2b7f, vol_flag_read, NULL, vol_flag_notify),
+ GATT_HANDLER(0x2b93, mp_name_read, NULL, mp_name_notify),
+ GATT_HANDLER(0x2b96, NULL, NULL, track_changed_notify),
+ GATT_HANDLER(0x2b97, track_title_read, NULL, track_title_notify),
+ GATT_HANDLER(0x2b98, track_duration_read, NULL, track_duration_notify),
+ GATT_HANDLER(0x2b99, track_position_read, track_position_write,
+ track_position_notify),
+ GATT_HANDLER(0x2b9a, playback_speed_read, playback_speed_write,
+ playback_speed_notify),
+ GATT_HANDLER(0x2b9b, seeking_speed_read, NULL, seeking_speed_notify),
+ GATT_HANDLER(0x2ba1, playing_order_read, playing_order_write,
+ playing_order_notify),
+ GATT_HANDLER(0x2ba2, playing_orders_supported_read, NULL, NULL),
+ GATT_HANDLER(0x2ba3, media_state_read, NULL, media_state_notify),
+ GATT_HANDLER(0x2ba4, NULL, media_cp_write, media_cp_notify),
+ GATT_HANDLER(0x2ba5, media_cp_op_supported_read, NULL,
+ media_cp_op_supported_notify),
+ GATT_HANDLER(0x2bba, content_control_id_read, NULL, NULL),
};
static struct gatt_handler *get_handler(struct gatt_db_attribute *attr)
--
2.25.1
