bthost: Allow sending ISO packets with sequence number and timestamp

Change bthost_send_iso to take packet sequence number and timestamp, and
allow it to send timestamped HCI ISO data packets.

Currently, btdev passes through ISO packets, so this can also be used to
test RX timestamping.

2 files changed, 34 insertions, 14 deletions

diff --git a/emulator/bthost.c b/emulator/bthost.c
index 3cce4666c..4671fe17d 100644
--- a/emulator/bthost.c
+++ b/emulator/bthost.c
@@ -38,6 +38,8 @@
 #define acl_flags(h)		(h >> 12)
 
 #define iso_flags_pb(f)		(f & 0x0003)
+#define iso_flags_ts(f)		((f >> 2) & 0x0001)
+#define iso_flags_pack(pb, ts)	(((pb) & 0x03) | (((ts) & 0x01) << 2))
 #define iso_data_len_pack(h, f)	((uint16_t) ((h) | ((f) << 14)))
 
 #define L2CAP_FEAT_FIXED_CHAN	0x00000080
@@ -728,41 +730,58 @@ void bthost_send_cid_v(struct bthost *bthost, uint16_t handle, uint16_t cid,
 	send_iov(bthost, handle, cid, iov, iovcnt);
 }
 
-static void send_iso(struct bthost *bthost, uint16_t handle,
+static void send_iso(struct bthost *bthost, uint16_t handle, bool ts,
+					uint16_t sn, uint32_t timestamp,
 					const struct iovec *iov, int iovcnt)
 {
 	struct bt_hci_iso_hdr iso_hdr;
 	struct bt_hci_iso_data_start data_hdr;
 	uint8_t pkt = BT_H4_ISO_PKT;
-	struct iovec pdu[3 + iovcnt];
+	struct iovec pdu[4 + iovcnt];
+	uint16_t flags, dlen;
 	int i, len = 0;
-	static uint16_t sn;
 
 	for (i = 0; i < iovcnt; i++) {
-		pdu[3 + i].iov_base = iov[i].iov_base;
-		pdu[3 + i].iov_len = iov[i].iov_len;
+		pdu[4 + i].iov_base = iov[i].iov_base;
+		pdu[4 + i].iov_len = iov[i].iov_len;
 		len += iov[i].iov_len;
 	}
 
 	pdu[0].iov_base = &pkt;
 	pdu[0].iov_len = sizeof(pkt);
 
-	iso_hdr.handle = acl_handle_pack(handle, 0x02);
-	iso_hdr.dlen = cpu_to_le16(len + sizeof(data_hdr));
+	flags = iso_flags_pack(0x02, ts);
+	dlen = len + sizeof(data_hdr);
+	if (ts)
+		dlen += sizeof(timestamp);
+
+	iso_hdr.handle = acl_handle_pack(handle, flags);
+	iso_hdr.dlen = cpu_to_le16(dlen);
 
 	pdu[1].iov_base = &iso_hdr;
 	pdu[1].iov_len = sizeof(iso_hdr);
 
-	data_hdr.sn = cpu_to_le16(sn++);
+	if (ts) {
+		timestamp = cpu_to_le32(timestamp);
+
+		pdu[2].iov_base = &timestamp;
+		pdu[2].iov_len = sizeof(timestamp);
+	} else {
+		pdu[2].iov_base = NULL;
+		pdu[2].iov_len = 0;
+	}
+
+	data_hdr.sn = cpu_to_le16(sn);
 	data_hdr.slen = cpu_to_le16(iso_data_len_pack(len, 0));
 
-	pdu[2].iov_base = &data_hdr;
-	pdu[2].iov_len = sizeof(data_hdr);
+	pdu[3].iov_base = &data_hdr;
+	pdu[3].iov_len = sizeof(data_hdr);
 
-	send_packet(bthost, pdu, 3 + iovcnt);
+	send_packet(bthost, pdu, 4 + iovcnt);
 }
 
-void bthost_send_iso(struct bthost *bthost, uint16_t handle,
+void bthost_send_iso(struct bthost *bthost, uint16_t handle, bool ts,
+					uint16_t sn, uint32_t timestamp,
 					const struct iovec *iov, int iovcnt)
 {
 	struct btconn *conn;
@@ -771,7 +790,7 @@ void bthost_send_iso(struct bthost *bthost, uint16_t handle,
 	if (!conn)
 		return;
 
-	send_iso(bthost, handle, iov, iovcnt);
+	send_iso(bthost, handle, ts, sn, timestamp, iov, iovcnt);
 }
 
 bool bthost_l2cap_req(struct bthost *bthost, uint16_t handle, uint8_t code,
diff --git a/emulator/bthost.h b/emulator/bthost.h
index c42444476..92182687f 100644
--- a/emulator/bthost.h
+++ b/emulator/bthost.h
@@ -79,7 +79,8 @@ void bthost_send_cid(struct bthost *bthost, uint16_t handle, uint16_t cid,
 					const void *data, uint16_t len);
 void bthost_send_cid_v(struct bthost *bthost, uint16_t handle, uint16_t cid,
 					const struct iovec *iov, int iovcnt);
-void bthost_send_iso(struct bthost *bthost, uint16_t handle,
+void bthost_send_iso(struct bthost *bthost, uint16_t handle, bool ts,
+					uint16_t sn, uint32_t timestamp,
 					const struct iovec *iov, int iovcnt);
 
 typedef void (*bthost_l2cap_rsp_cb) (uint8_t code, const void *data,