
This patch improves _get_ipv4_forward_table by doing only one call to iphlpapi.GetIpForwardTable. Previously two calls were made, where the second call should have been called only when the first one failed with INSUFFICIENT_BUFFER. This patch also adds tests for _get_ipv4_forward_table, which was previously untested. Change-Id: I5728948557e749d0e0005a9d90c12e4093dc3307