Add support for decoding GetFolderItems(MediaElementItem) for avrcp in
bluetooth monitor.
Channel: 65 len 20 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: GetFolderItems: len 0x000a
Scope: 0x01 (Media Player Virtual Filesystem)
StartItem: 0x00000000 (0)
EndItem: 0x0000000a (10)
AttributeCount: 0xff (255)
AttributeID: 0x0000326e (Reserved)
---
monitor/avctp.c | 111 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 111 insertions(+)
diff --git a/monitor/avctp.c b/monitor/avctp.c
index 7e55bef..4fcbfa1 100644
--- a/monitor/avctp.c
+++ b/monitor/avctp.c
@@ -770,6 +770,18 @@ static const char *foldertype2str(uint8_t type)
return "Reserved";
}
+static const char *elementtype2str(uint8_t type)
+{
+ switch (type) {
+ case 0x00:
+ return "Audio";
+ case 0x01:
+ return "Video";
+ }
+
+ return "Reserved";
+}
+
static bool avrcp_passthrough_packet(struct avctp_frame *avctp_frame,
uint8_t indent)
{
@@ -1847,6 +1859,101 @@ static bool avrcp_folder_item(struct avctp_frame *avctp_frame,
return true;
}
+static bool avrcp_attribute_entry_list(struct avctp_frame *avctp_frame,
+ uint8_t indent, uint8_t count)
+{
+ struct l2cap_frame *frame = &avctp_frame->l2cap_frame;
+
+ for (; count > 0; count--) {
+ uint32_t attr;
+ uint16_t charset;
+ uint8_t len;
+
+ if (!l2cap_frame_get_be32(frame, &attr))
+ return false;
+
+ print_field("%*cAttributeID: 0x%08x (%s)", indent, ' ',
+ attr, mediattr2str(attr));
+
+ if (!l2cap_frame_get_be16(frame, &charset))
+ return false;
+
+ print_field("%*cCharsetID: 0x%04x (%s)", indent, ' ',
+ charset, charset2str(charset));
+
+ if (!l2cap_frame_get_u8(frame, &len))
+ return false;
+
+ print_field("%*cAttributeLength: 0x%02x (%u)", indent, ' ',
+ len, len);
+
+ print_field("%*cAttributeValue: ", indent, ' ');
+ for (; len > 0; len--) {
+ uint8_t c;
+
+ if (!l2cap_frame_get_u8(frame, &c))
+ return false;
+
+ printf("%1c", isprint(c) ? c : '.');
+ }
+ }
+
+ return true;
+}
+
+static bool avrcp_media_element_item(struct avctp_frame *avctp_frame,
+ uint8_t indent)
+{
+ struct l2cap_frame *frame = &avctp_frame->l2cap_frame;
+ uint64_t uid;
+ uint16_t charset, namelen;
+ uint8_t type, count;
+
+ if (!l2cap_frame_get_be64(frame, &uid))
+ return false;
+
+ print_field("%*cElementUID: 0x%16" PRIx64 " (%" PRIu64 ")",
+ indent, ' ', uid, uid);
+
+ if (!l2cap_frame_get_u8(frame, &type))
+ return false;
+
+ print_field("%*cElementType: 0x%02x (%s)", indent, ' ',
+ type, elementtype2str(type));
+
+ if (!l2cap_frame_get_be16(frame, &charset))
+ return false;
+
+ print_field("%*cCharsetID: 0x%04x (%s)", indent, ' ',
+ charset, charset2str(charset));
+
+ if (!l2cap_frame_get_be16(frame, &namelen))
+ return false;
+
+ print_field("%*cNameLength: 0x%04x (%u)", indent, ' ',
+ namelen, namelen);
+
+ print_field("%*cName: ", indent, ' ');
+ for (; namelen > 0; namelen--) {
+ uint8_t c;
+ if (!l2cap_frame_get_u8(frame, &c))
+ return false;
+
+ printf("%1c", isprint(c) ? c : '.');
+ }
+
+ if (!l2cap_frame_get_u8(frame, &count))
+ return false;
+
+ print_field("%*cAttributeCount: 0x%02x (%u)", indent, ' ',
+ count, count);
+
+ if (!avrcp_attribute_entry_list(avctp_frame, indent, count))
+ return false;
+
+ return true;
+}
+
static bool avrcp_get_folder_items(struct avctp_frame *avctp_frame)
{
struct l2cap_frame *frame = &avctp_frame->l2cap_frame;
@@ -1930,6 +2037,10 @@ response:
avrcp_folder_item(avctp_frame, indent);
break;
case AVRCP_MEDIA_ELEMENT_ITEM_TYPE:
+ avrcp_media_element_item(avctp_frame, indent);
+ break;
+ default:
+ print_field("%*cUnknown Media Item type", indent, ' ');
packet_hexdump(frame->data, frame->size);
break;
}
--
1.9.1
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