Ethernet.hostByName added

Author: JAndrassy

src/Ethernet.cpp

@@ -19,6 +19,7 @@
 
 #include <Arduino.h>
 #include "Ethernet.h"
+#include "Dns.h"
 #include "utility/Enc28J60Network.h"
 
 extern "C"
@@ -184,6 +185,18 @@ IPAddress UIPEthernetClass::dnsIP(int n) {
   return (n == 0) ? _dnsServerAddress : IPAddress();
 }
 
+int UIPEthernetClass::hostByName(const char* hostname, IPAddress& result)
+{
+  // Look up the host first
+  int ret = 0;
+#if UIP_UDP
+  DNSClient dns;
+  dns.begin(_dnsServerAddress);
+  ret = dns.getHostByName(hostname, result);
+#endif
+  return ret;
+}
+
 void
 UIPEthernetClass::tick()
 {

src/Ethernet.h

@@ -104,6 +104,8 @@ class UIPEthernetClass
   void setDnsServerIP(const IPAddress dns_server) { _dnsServerAddress = dns_server; }
   void setDNS(IPAddress dns_server)  { _dnsServerAddress = dns_server; }
 
+  int hostByName(const char* hostname, IPAddress& result);
+
 private:
   static bool initialized;
   static memhandle in_packet;

src/EthernetClient.cpp

@@ -25,7 +25,6 @@ extern "C"
 }
 #include "Ethernet.h"
 #include "EthernetClient.h"
-#include "Dns.h"
 
 #define UIP_TCP_PHYH_LEN UIP_LLH_LEN+UIP_IPTCPH_LEN
 
@@ -87,11 +86,8 @@ UIPClient::connect(const char *host, uint16_t port)
   // Look up the host first
   int ret = 0;
 #if UIP_UDP
-  DNSClient dns;
   IPAddress remote_addr;
-
-  dns.begin(UIPEthernetClass::_dnsServerAddress);
-  ret = dns.getHostByName(host, remote_addr);
+  ret = Ethernet.hostByName(host, remote_addr);
   if (ret == 1) {
     return connect(remote_addr, port);
   }

src/EthernetUdp.cpp

@@ -19,7 +19,6 @@
 
 #include "Ethernet.h"
 #include "EthernetUdp.h"
-#include "Dns.h"
 
 extern "C" {
 #include "utility/uip-conf.h"
@@ -149,11 +148,8 @@ UIPUDP::beginPacket(const char *host, uint16_t port)
 {
   // Look up the host first
   int ret = 0;
-  DNSClient dns;
   IPAddress remote_addr;
-
-  dns.begin(Ethernet.dnsServerIP());
-  ret = dns.getHostByName(host, remote_addr);
+  ret = Ethernet.hostByName(host, remote_addr);
   if (ret == 1) {
     return beginPacket(remote_addr, port);
   } else {