Move to SocketAddress in gethostbyname

NetworkInterface.cpp

@@ -17,7 +17,14 @@
 #include "DnsQuery.h"
 #include "mbed.h"
 
-int NetworkInterface::gethostbyname(const char *name, char *dest)
+int NetworkInterface::gethostbyname(SocketAddress *address, const char *name)
 {
-    return dnsQuery(this, name, dest);
+    char buffer[NSAPI_IP_SIZE];
+    int err = dnsQuery(this, name, buffer);
+    if (err) {
+        return err;
+    }
+
+    address->set_ip_address(buffer);
+    return 0;
 }

NetworkInterface.h

@@ -87,11 +87,11 @@ public:
     }
 
     /** Looks up the specified host's IP address
+     *  @param address  Destination for the host SocketAddress
      *  @param name     Hostname to lookup
-     *  @param dest     Destination for IP address, must have space for SocketAddress::IP_SIZE
      *  @return         0 on success, negative on failure
      */
-    virtual int gethostbyname(const char *name, char *dest);
+    virtual int gethostbyname(SocketAddress *address, const char *name);
 
 protected:
     friend class Socket;

SocketAddress.cpp

@@ -98,10 +98,8 @@ SocketAddress::SocketAddress(NetworkInterface *iface, const char *host, uint16_t
         address_to_ipv4(_ip_bytes, host);
     } else {
         // DNS lookup
-        char addr[NSAPI_IP_SIZE];
-        int err = iface->gethostbyname(host, addr);
+        int err = iface->gethostbyname(this, host);
         if (!err) {
-            set_ip_address(addr);
             set_port(port);
         } else {
             _ip_version = NSAPI_IPv4;