rtl8720dn: add support for rtl8720dn

rtl8720dn/wifi.go

@@ -0,0 +1,72 @@
+package rtl8720dn
+
+import (
+	"fmt"
+	"time"
+)
+
+func (r *RTL8720DN) ConnectToAP(ssid string, password string) error {
+	if len(ssid) == 0 || len(password) == 0 {
+		return fmt.Errorf("connection failed: either ssid or password not set")
+	}
+
+	_, err := r.Rpc_wifi_off()
+	if err != nil {
+		return err
+	}
+	_, err = r.Rpc_wifi_on(0x00000001)
+	if err != nil {
+		return err
+	}
+
+	_, err = r.Rpc_wifi_disconnect()
+	if err != nil {
+		return err
+	}
+
+	numTry := 5
+	securityType := uint32(0x00400004)
+	for i := 0; i < numTry; i++ {
+		ret, err := r.Rpc_wifi_connect(ssid, password, securityType, -1, 0)
+		if err != nil {
+			return err
+		}
+		if ret != 0 {
+			if i == numTry-1 {
+				return fmt.Errorf("connection failed: rpc_wifi_connect failed")
+			}
+			time.Sleep(100 * time.Millisecond)
+		} else {
+			break
+		}
+	}
+
+	_, err = r.Rpc_tcpip_adapter_dhcpc_start(0)
+	if err != nil {
+		return err
+	}
+
+	for i := 0; i < 3; i++ {
+		_, err = r.Rpc_wifi_is_connected_to_ap()
+		if err != nil {
+			return err
+		}
+		time.Sleep(1 * time.Second)
+	}
+
+	return nil
+}
+
+func (r *RTL8720DN) GetIP() (ip, subnet, gateway IPAddress, err error) {
+	ip_info := make([]byte, 12)
+	_, err = r.Rpc_tcpip_adapter_get_ip_info(0, ip_info)
+	if err != nil {
+		return nil, nil, nil, err
+	}
+
+	ip = IPAddress(ip_info[0:4])
+	subnet = IPAddress(ip_info[4:8])
+	gateway = IPAddress(ip_info[8:12])
+
+	return ip, subnet, gateway, nil
+}