rtl8720dn: implement ConnectModeAP

Signed-off-by: deadprogram <ron@hybridgroup.com>

netdev/netdev.go

@@ -36,6 +36,7 @@ var (
 	ErrFamilyNotSupported   = errors.New("Address family not supported")
 	ErrProtocolNotSupported = errors.New("Socket protocol/type not supported")
 	ErrStartingDHCPClient   = errors.New("Error starting DHPC client")
+	ErrStartingDHCPServer   = errors.New("Error starting DHPC server")
 	ErrNoMoreSockets        = errors.New("No more sockets")
 	ErrClosingSocket        = errors.New("Error closing socket")
 	ErrNotSupported         = errors.New("Not supported")

rtl8720dn/rtl8720dn.go

@@ -32,8 +32,9 @@ var (
 )
 
 const (
-	O_NONBLOCK   = 1 // note: different value than syscall.O_NONBLOCK (0x800)
-	RTW_MODE_STA = 0x00000001
+	O_NONBLOCK     = 1 // note: different value than syscall.O_NONBLOCK (0x800)
+	RTW_MODE_STA   = 0x00000001
+	defaultChannel = 6
 )
 
 type sock int32
@@ -135,6 +136,51 @@ func (r *rtl8720dn) connectToAP() error {
 	return r.startDhcpc()
 }
 
+func (r *rtl8720dn) startDhcps() error {
+	if result := r.rpc_tcpip_adapter_dhcps_start(0); result == -1 {
+		return netdev.ErrStartingDHCPServer
+	}
+	return nil
+}
+
+func (r *rtl8720dn) startAP() error {
+	if len(r.params.Ssid) == 0 {
+		return netlink.ErrMissingSSID
+	}
+
+	if len(r.params.Passphrase) != 0 && len(r.params.Passphrase) < 8 {
+		return netlink.ErrShortPassphrase
+	}
+
+	if debugging(debugBasic) {
+		fmt.Printf("Starting Wifi AP as SSID '%s'...", r.params.Ssid)
+	}
+
+	// Start the connection process
+	securityType := uint32(0) // RTW_SECURITY_OPEN
+	if len(r.params.Passphrase) != 0 {
+		securityType = 0x00400004 // RTW_SECURITY_WPA2_AES_PSK
+	}
+
+	result := r.rpc_wifi_start_ap(r.params.Ssid, r.params.Passphrase, securityType, defaultChannel)
+	if result != 0 {
+		if debugging(debugBasic) {
+			fmt.Printf("FAILED\r\n")
+		}
+		return netlink.ErrConnectFailed
+	}
+
+	if debugging(debugBasic) {
+		fmt.Printf("LISTENING\r\n")
+	}
+
+	if r.notifyCb != nil {
+		r.notifyCb(netlink.EventNetUp)
+	}
+
+	return r.startDhcps()
+}
+
 func (r *rtl8720dn) showDriver() {
 	if r.driverShown {
 		return
@@ -246,14 +292,27 @@ func (r *rtl8720dn) netConnect(reset bool) error {
 	}
 	r.showDevice()
 
+retry:
 	for i := 0; r.params.Retries == 0 || i < r.params.Retries; i++ {
-		if err := r.connectToAP(); err != nil {
-			if err == netlink.ErrConnectFailed {
-				continue
+		switch r.params.ConnectMode {
+		case netlink.ConnectModeAP:
+			if err := r.startAP(); err != nil {
+				if err == netlink.ErrConnectFailed {
+					continue
+				}
+				return err
 			}
-			return err
+			break retry
+
+		default:
+			if err := r.connectToAP(); err != nil {
+				if err == netlink.ErrConnectFailed {
+					continue
+				}
+				return err
+			}
+			break retry
 		}
-		break
 	}
 
 	if r.networkDown() {