Fixed DNS issue

Author: mlafauci

WiFi/WiFi.cpp

@@ -175,4 +175,9 @@ uint8_t WiFiClass::status()
     return WiFiDrv::getConnectionStatus();
 }
 
+int WiFiClass::hostByName(const char* aHostname, IPAddress& aResult)
+{
+	return WiFiDrv::getHostByName(aHostname, aResult);
+}
+
 WiFiClass WiFi;

WiFi/WiFi.h

@@ -159,6 +159,15 @@ class WiFiClass
      */
     uint8_t status();
 
+    /*
+     * Resolve the given hostname to an IP address.
+     * param aHostname: Name to be resolved
+     * param aResult: IPAddress structure to store the returned IP address
+     * result: 1 if aIPAddrString was successfully converted to an IP address,
+     *          else error code
+     */
+    int hostByName(const char* aHostname, IPAddress& aResult);
+
     friend class WiFiClient;
     friend class WiFiServer;
 };

WiFi/WiFiClient.cpp

@@ -21,22 +21,12 @@ WiFiClient::WiFiClient(uint8_t sock) : _sock(sock) {
 }
 
 int WiFiClient::connect(const char* host, uint16_t port) {
-	/* TODO Add DNS wifi spi function to resolve DNS */
-#if 0
-  // Look up the host first
-  int ret = 0;
-  DNSClient dns;
-  IPAddress remote_addr;
-
-  dns.begin(Ethernet.dnsServerIP());
-  ret = dns.getHostByName(host, remote_addr);
-  if (ret == 1) {
-    return connect(remote_addr, port);
-  } else {
-    return ret;
-  }
-#endif
-  return 0;
+	IPAddress remote_addr;
+	if (WiFi.hostByName(host, remote_addr))
+	{
+		return connect(remote_addr, port);
+	}
+	return 0;
 }
 
 int WiFiClient::connect(IPAddress ip, uint16_t port) {

WiFi/utility/wifi_drv.cpp

@@ -376,4 +376,66 @@ int32_t WiFiDrv::getRSSINetoworks(uint8_t networkItem)
 	return networkRssi;
 }
 
+uint8_t WiFiDrv::reqHostByName(const char* aHostname)
+{
+	WAIT_FOR_SLAVE_SELECT();
+
+    // Send Command
+    SpiDrv::sendCmd(REQ_HOST_BY_NAME_CMD, PARAM_NUMS_1);
+    SpiDrv::sendParam((uint8_t*)aHostname, strlen(aHostname), LAST_PARAM);
+
+    //Wait the reply elaboration
+    SpiDrv::waitForSlaveReady();
+
+    // Wait for reply
+    uint8_t _data = 0;
+    uint8_t _dataLen = 0;
+    uint8_t result = SpiDrv::waitResponseCmd(REQ_HOST_BY_NAME_CMD, PARAM_NUMS_1, &_data, &_dataLen);
+
+    SpiDrv::spiSlaveDeselect();
+
+    return result;
+}
+
+int WiFiDrv::getHostByName(IPAddress& aResult)
+{
+	uint8_t  _ipAddr[WL_IPV4_LENGTH];
+	IPAddress dummy(0xFF,0xFF,0xFF,0xFF);
+	int result = 0;
+
+	WAIT_FOR_SLAVE_SELECT();
+    // Send Command
+    SpiDrv::sendCmd(GET_HOST_BY_NAME_CMD, PARAM_NUMS_0);
+
+    //Wait the reply elaboration
+    SpiDrv::waitForSlaveReady();
+
+    // Wait for reply
+    uint8_t _dataLen = 0;
+    if (!SpiDrv::waitResponseCmd(GET_HOST_BY_NAME_CMD, PARAM_NUMS_1, _ipAddr, &_dataLen))
+    {
+        WARN("error waitResponse");
+    }else{
+    	aResult = _ipAddr;
+    	result = (aResult != dummy);
+    }
+    SpiDrv::spiSlaveDeselect();
+    return result;
+}
+
+int WiFiDrv::getHostByName(const char* aHostname, IPAddress& aResult)
+{
+	uint8_t retry = 10;
+	if (reqHostByName(aHostname))
+	{
+		while(!getHostByName(aResult) && --retry > 0)
+		{
+			delay(500);
+		}
+	}else{
+		return 0;
+	}
+	return 1;
+}
+
 WiFiDrv wiFiDrv;

WiFi/utility/wifi_drv.h

@@ -31,6 +31,10 @@ class WiFiDrv
 	 */
     static void getNetworkData(uint8_t *ip, uint8_t *mask, uint8_t *gwip);
 
+    static uint8_t reqHostByName(const char* aHostname);
+
+    static int getHostByName(IPAddress& aResult);
+
 public:
 
     /*
@@ -181,6 +185,15 @@ class WiFiDrv
      */
     static uint8_t getEncTypeNetowrks(uint8_t networkItem);
 
+    /*
+     * Resolve the given hostname to an IP address.
+     * param aHostname: Name to be resolved
+     * param aResult: IPAddress structure to store the returned IP address
+     * result: 1 if aIPAddrString was successfully converted to an IP address,
+     *          else error code
+     */
+    static int getHostByName(const char* aHostname, IPAddress& aResult);
+
 };
 
 extern WiFiDrv wiFiDrv;

WiFi/utility/wifi_spi.h

@@ -45,6 +45,8 @@ enum {
 	GET_IDX_SSID_CMD	= 0x31,
 	GET_IDX_RSSI_CMD	= 0x32,
 	GET_IDX_ENCT_CMD	= 0x33,
+	REQ_HOST_BY_NAME_CMD= 0x34,
+	GET_HOST_BY_NAME_CMD= 0x35,
 
     // All command with DATA_FLAG 0x40 send a 16bit Len