Add support for decoding AVRCP ChangePath in bluetooth monitor.
Channel: 65 len 21 ctrl 0x0000 [PSM 27 mode 3] {chan 1}
I-frame: Unsegmented TxSeq 0 ReqSeq 0
AVCTP Browsing: Command: type 0x00 label 0 PID 0x110e
AVRCP: ChangePath: len 0x000b
UIDCounter: 0x0000 (0)
Direction: 0x01 (Folder Down)
FolderUID: 0x 1 (1)
---
monitor/avctp.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
diff --git a/monitor/avctp.c b/monitor/avctp.c
index f4f3250..e071393 100644
--- a/monitor/avctp.c
+++ b/monitor/avctp.c
@@ -1742,6 +1742,74 @@ static bool avrcp_control_packet(struct avctp_frame *avctp_frame)
}
}
+static const char *dir2str(uint8_t dir)
+{
+ switch (dir) {
+ case 0x00:
+ return "Folder Up";
+ case 0x01:
+ return "Folder Down";
+ }
+
+ return "Reserved";
+}
+
+static bool avrcp_change_path(struct avctp_frame *avctp_frame)
+{
+ struct l2cap_frame *frame = &avctp_frame->l2cap_frame;
+ uint64_t uid;
+ uint32_t items;
+ uint16_t uidcounter;
+ uint8_t dir, status, indent = 2;
+
+ if (avctp_frame->hdr & 0x02)
+ goto response;
+
+ if (frame->size < 11) {
+ print_field("%*cPDU Malformed", indent, ' ');
+ packet_hexdump(frame->data, frame->size);
+ return false;
+ }
+
+ if (!l2cap_frame_get_be16(frame, &uidcounter))
+ return false;
+
+ print_field("%*cUIDCounter: 0x%04x (%u)", indent, ' ',
+ uidcounter, uidcounter);
+
+ if (!l2cap_frame_get_u8(frame, &dir))
+ return false;
+
+ print_field("%*cDirection: 0x%02x (%s)", indent, ' ',
+ dir, dir2str(dir));
+
+ if (!l2cap_frame_get_be64(frame, &uid))
+ return false;
+
+ print_field("%*cFolderUID: 0x%16" PRIx64 " (%" PRIu64 ")", indent, ' ',
+ uid, uid);
+
+ return true;
+
+response:
+ if (!l2cap_frame_get_u8(frame, &status))
+ return false;
+
+ print_field("%*cStatus: 0x%02x (%s)", indent, ' ',
+ status, error2str(status));
+
+ if (frame->size == 1)
+ return false;
+
+ if (!l2cap_frame_get_be32(frame, &items))
+ return false;
+
+ print_field("%*cNumber of Items: 0x%04x (%u)", indent, ' ',
+ items, items);
+
+ return true;
+}
+
static bool avrcp_media_player_item(struct avctp_frame *avctp_frame,
uint8_t indent)
{
@@ -2136,6 +2204,9 @@ static bool avrcp_browsing_packet(struct avctp_frame *avctp_frame)
case AVRCP_GET_FOLDER_ITEMS:
avrcp_get_folder_items(avctp_frame);
break;
+ case AVRCP_CHANGE_PATH:
+ avrcp_change_path(avctp_frame);
+ break;
default:
packet_hexdump(frame->data, frame->size);
}
--
1.9.1
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