Merge pull request #38 from ARMmbed/use-os-gethostbyname

Use host OS gethostbyname

Author: geky

ESP8266Interface.cpp

@@ -85,29 +85,6 @@ int ESP8266Interface::connect()
     return NSAPI_ERROR_OK;
 }
 
-nsapi_error_t ESP8266Interface::gethostbyname(const char *name, SocketAddress *address, nsapi_version_t version)
-{
-    if (address->set_ip_address(name)) {
-        if (version != NSAPI_UNSPEC && address->get_ip_version() != version) {
-            return NSAPI_ERROR_DNS_FAILURE;
-        }
-
-        return NSAPI_ERROR_OK;
-    }
-    
-    char *ipbuff = new char[NSAPI_IP_SIZE];
-    int ret = 0;
-    
-    if(!_esp.dns_lookup(name, ipbuff)) {
-        ret = NSAPI_ERROR_DEVICE_ERROR;
-    } else {
-        address->set_ip_address(ipbuff);
-    }
-
-    delete[] ipbuff;
-    return ret;
-}
-
 int ESP8266Interface::set_credentials(const char *ssid, const char *pass, nsapi_security_t security)
 {
     memset(ap_ssid, 0, sizeof(ap_ssid));

ESP8266Interface.h

@@ -57,21 +57,7 @@ class ESP8266Interface : public NetworkStack, public WiFiInterface
      */
     virtual int connect(const char *ssid, const char *pass, nsapi_security_t security = NSAPI_SECURITY_NONE,
                                   uint8_t channel = 0);
-    
-    /** Translates a hostname to an IP address with specific version
-     *
-     *  The hostname may be either a domain name or an IP address. If the
-     *  hostname is an IP address, no network transactions will be performed.
-     *
-     *
-     *  @param host     Hostname to resolve
-     *  @param address  Destination for the host SocketAddress
-     *  @param version  IP version of address to resolve, NSAPI_UNSPEC indicates
-     *                  version is chosen by the stack (defaults to NSAPI_UNSPEC)
-     *  @return         0 on success, negative error code on failure
-     */
-    virtual nsapi_error_t gethostbyname(const char *name, SocketAddress *address, nsapi_version_t version = NSAPI_UNSPEC);
-    
+
     /** Set the WiFi network credentials
      *
      *  @param ssid      Name of the network to connect to