Updated lwip API and configuration files to lwip 2.0

Author: Mika Leppänen

features/net/FEATURE_IPV4/lwip-interface/EthernetInterface.cpp

@@ -59,17 +59,29 @@ const char *EthernetInterface::get_mac_address()
 
 const char *EthernetInterface::get_ip_address()
 {
-    return lwip_get_ip_address();
+    if (lwip_get_ip_address(_ip_address, sizeof _ip_address)) {
+        return _ip_address;
+    }
+
+    return 0;
 }
 
 const char *EthernetInterface::get_netmask()
 {
-    return lwip_get_netmask();
+    if (lwip_get_netmask(_netmask, sizeof _netmask)) {
+        return _netmask;
+    }
+
+    return 0;
 }
 
 const char *EthernetInterface::get_gateway()
 {
-    return lwip_get_gateway();
+    if (lwip_get_gateway(_gateway, sizeof _gateway)) {
+        return _gateway;
+    }
+
+    return 0;
 }
 
 NetworkStack *EthernetInterface::get_stack()

features/net/FEATURE_IPV4/lwip-interface/EthernetInterface.h

@@ -92,7 +92,7 @@ class EthernetInterface : public EthInterface
      */
     virtual const char *get_netmask();
 
-    /** Get the local gateway
+    /** Get the local gateways
      *
      *  @return         Null-terminated representation of the local gateway
      *                  or null if no network mask has been recieved
@@ -107,7 +107,7 @@ class EthernetInterface : public EthInterface
     virtual NetworkStack *get_stack();
 
     bool _dhcp;
-    char _ip_address[NSAPI_IPv4_SIZE];
+    char _ip_address[IPADDR_STRLEN_MAX];
     char _netmask[NSAPI_IPv4_SIZE];
     char _gateway[NSAPI_IPv4_SIZE];
 };