Support for decoding AVRCP specific AV/C commands added in
Bluetooth monitor.
---
monitor/avctp.c | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 100 insertions(+), 1 deletion(-)
diff --git a/monitor/avctp.c b/monitor/avctp.c
index d7f461f..36befab 100644
--- a/monitor/avctp.c
+++ b/monitor/avctp.c
@@ -43,10 +43,101 @@
#include "sdp.h"
#include "avctp.h"
+static const char *ctype2str(uint8_t ctype)
+{
+ return "Unknown";
+}
+
+static const char *subunit2str(uint8_t subunit)
+{
+ return "Reserved";
+}
+
+static const char *opcode2str(uint8_t opcode)
+{
+ return "Unknown";
+}
+
+static void avrcp_passthrough_packet(const struct l2cap_frame *frame)
+{
+}
+
+static void avrcp_pdu_packet(const struct l2cap_frame *frame, uint8_t ctype,
+ uint8_t indent)
+{
+}
+
+static void avrcp_control_packet(const struct l2cap_frame *frame)
+{
+ uint8_t ctype, address, subunit, opcode, indent = 2;
+ struct l2cap_frame avrcp_frame;
+
+ ctype = *((uint8_t *) frame->data);
+ address = *((uint8_t *) (frame->data + 1));
+ opcode = *((uint8_t *) (frame->data + 2));
+
+ print_field("AV/C: %s: address 0x%02x opcode 0x%02x", ctype2str(ctype),
+ address, opcode);
+
+ subunit = address >> 3;
+
+ print_field("%*cSubunit: %s", indent, ' ', subunit2str(subunit));
+
+ print_field("%*cOpcode: %s", indent, ' ', opcode2str(opcode));
+
+ /* Skip non-panel subunit packets */
+ if (subunit != 0x09) {
+ packet_hexdump(frame->data, frame->size);
+ return;
+ }
+
+ /* Not implemented should not contain any operand */
+ if (ctype == 0x8) {
+ packet_hexdump(frame->data, frame->size);
+ return;
+ }
+
+ switch (opcode) {
+ case 0x7c:
+ avrcp_passthrough_packet(frame);
+ break;
+ case 0x00:
+ print_field("%*cCompany ID: 0x%02x%02x%02x", indent, ' ',
+ *((uint8_t *) (frame->data + 3)),
+ *((uint8_t *) (frame->data + 4)),
+ *((uint8_t *) (frame->data + 5)));
+
+ l2cap_frame_pull(&avrcp_frame, frame, 6);
+ avrcp_pdu_packet(&avrcp_frame, ctype, 10);
+ break;
+ default:
+ packet_hexdump(frame->data, frame->size);
+ }
+}
+
+static void avrcp_browsing_packet(const struct l2cap_frame *frame, uint8_t hdr)
+{
+}
+
+static void avrcp_packet(const struct l2cap_frame *frame, uint8_t hdr)
+{
+ switch (frame->psm) {
+ case 0x17:
+ avrcp_control_packet(frame);
+ break;
+ case 0x1B:
+ avrcp_browsing_packet(frame, hdr);
+ break;
+ default:
+ packet_hexdump(frame->data, frame->size);
+ }
+}
+
void avctp_packet(const struct l2cap_frame *frame)
{
uint8_t hdr;
uint16_t pid;
+ struct l2cap_frame avctp_frame;
const char *pdu_color;
if (frame->size < 3) {
@@ -70,5 +161,13 @@ void avctp_packet(const struct l2cap_frame *frame)
hdr & 0x02 ? "Response" : "Command",
hdr & 0x0c, hdr >> 4, pid);
- packet_hexdump(frame->data + 3, frame->size - 3);
+ l2cap_frame_pull(&avctp_frame, frame, 3);
+
+ /* Copy psm as other protocols may need it later */
+ avctp_frame.psm = frame->psm;
+
+ if (pid == 0x110e || pid == 0x110c)
+ avrcp_packet(&avctp_frame, hdr);
+ else
+ packet_hexdump(frame->data + 3, frame->size - 3);
}
--
1.9.1
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