Index: lib/rtl/network.c
===================================================================
--- lib/rtl/network.c	(revision 66266)
+++ lib/rtl/network.c	(working copy)
@@ -337,7 +337,7 @@
 }
 
 /*
-* @unimplemented
+* @implemented
 */
 NTSTATUS
 NTAPI
@@ -346,8 +346,25 @@
                           OUT struct in_addr *Address,
                           OUT PUSHORT Port)
 {
-    UNIMPLEMENTED;
-    return STATUS_NOT_IMPLEMENTED;
+    LPCWSTR CurrentChar;
+    if( !AddressString || !Address || !Port || !NT_SUCCESS(RtlIpv4StringToAddressW( AddressString, Strict, &CurrentChar, Address ) ) )
+        return STATUS_INVALID_PARAMETER;
+    if( !*CurrentChar )
+    {
+        *Port = 0;
+        return STATUS_SUCCESS;
+    }
+    if( *CurrentChar != ':' )
+        return STATUS_INVALID_PARAMETER;
+    ++CurrentChar;
+
+    DWORD convertedPort = 0;
+    NTSTATUS Status = RtlpStringToUlong(CurrentChar, FALSE, &CurrentChar, &convertedPort);
+
+    if (!NT_SUCCESS(Status) || *CurrentChar || !convertedPort || convertedPort > 0xffff)
+        return STATUS_INVALID_PARAMETER;
+    *Port = WN2H(convertedPort);
+    return STATUS_SUCCESS;
 }
 
 /*