Fixes resource leak

Signed-off-by: CapXilinx <melik-merkumians@acin.tuwien.ac.at>

source/src/ports/POSIX/networkconfig.c

@@ -42,6 +42,7 @@ void ConfigureMacAddress(const char *interface) {
     memcpy( &(g_ethernet_link.physical_address), &ifr.ifr_hwaddr.sa_data,
             sizeof(g_ethernet_link.physical_address) );
   }
+  CloseSocket(fd);
 }
 
 EipStatus ConfigureNetworkInterface(const char *const network_interface) {
@@ -104,6 +105,8 @@ EipStatus ConfigureNetworkInterface(const char *const network_interface) {
   g_multicast_configuration.starting_multicast_address = htonl(
     ntohl( inet_addr("239.192.1.0") ) + (host_id << 5) );
 
+  CloseSocket(fd);
+
   return kEipStatusOk;
 }