From 5cf67d854edb1b73405be9a4c2675c6b23dd5b2b Mon Sep 17 00:00:00 2001
From: Tai Groot <tai@taigrr.com>
Date: Sat, 13 Jul 2024 02:21:38 -0700
Subject: [PATCH] enable setting MACAddr for cyw43439

---
 hci_cyw43439.go | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 hci_cyw43439.go

diff --git a/hci_cyw43439.go b/hci_cyw43439.go
new file mode 100644
index 0000000..3213f73
--- /dev/null
+++ b/hci_cyw43439.go
@@ -0,0 +1,27 @@
+//go:build cyw43439
+
+package bluetooth
+
+const (
+	ogfVendor = 0x3f
+
+	ocfSetBTMACAddr = 0x0001
+)
+
+func (a *Adapter) SetBdAddr(address Address) error {
+	return a.hci.setBdAddr(address)
+}
+
+func (h *hci) setBdAddr(address Address) error {
+	hciPacket := make([]byte, len(address.MACAddress.MAC))
+	// Reverse the byte order as per spec
+	for i := range address.MACAddress.MAC {
+		hciPacket[i] = address.MACAddress.MAC[len(address.MACAddress.MAC)-1-i]
+	}
+
+	if err := h.sendWithoutResponse(ogfVendor<<ogfCommandPos|ocfSetBTMACAddr, hciPacket); err != nil {
+		return err
+	}
+
+	return nil
+}