TEST_ASSERT_rx();
TEST_ASSERT( TCP_Pkt_CheckC(rxlen, rxbuf, &ofs, &len, &testconn, TCP_ACK) );
TEST_ASSERT_REL( len, ==, 0 );
TEST_ASSERT_rx();
TEST_ASSERT( TCP_Pkt_CheckC(rxlen, rxbuf, &ofs, &len, &testconn, TCP_ACK) );
TEST_ASSERT_REL( len, ==, 0 );