Modify multihoming tests to use get_ip_address_if

Author: michalpasztamobica

TESTS/network/multihoming/main.cpp

@@ -37,6 +37,7 @@
 #include "utest.h"
 #include "utest/utest_stack_trace.h"
 #include "multihoming_tests.h"
+#include "LWIPStack.h"
 
 using namespace utest::v1;
 
@@ -77,6 +78,10 @@ static void _ifup()
     SocketAddress eth_ip_address;
     eth->get_ip_address(&eth_ip_address);
     printf("MBED: IP address is '%s' interface name %s\n", eth_ip_address.get_ip_address(), interface_name[interface_num]);
+    SocketAddress eth_ip_address_if;
+    LWIP::get_instance().get_ip_address_if(&eth_ip_address_if, interface_name[interface_num]);
+    printf("IP_if: %s\n", eth_ip_address.get_ip_address());
+    TEST_ASSERT_EQUAL(eth_ip_address_if, eth_ip_address);
     interface_num++;
 
     wifi = WiFiInterface::get_default_instance();
@@ -104,6 +109,10 @@ static void _ifup()
         SocketAddress wifi_ip_address;
         wifi->get_ip_address(&wifi_ip_address);
         printf("IP: %s\n", STRING_VERIFY(wifi_ip_address.get_ip_address()));
+        SocketAddress wifi_ip_address_if;
+        LWIP::get_instance().get_ip_address_if(&wifi_ip_address_if, interface_name[interface_num]);
+        printf("IP_if: %s\n", STRING_VERIFY(wifi_ip_address_if.get_ip_address()));
+        TEST_ASSERT_EQUAL(wifi_ip_address_if, wifi_ip_address);
         SocketAddress wifi_netmask;
         wifi->get_netmask(&wifi_netmask);
         printf("Netmask: %s\n", STRING_VERIFY(wifi_netmask.get_ip_address()));