TX_BD_FLAGS_TCP_UDP_CHKSUM
lflags |= cpu_to_le32(TX_BD_FLAGS_TCP_UDP_CHKSUM);
cpu_to_le32(TX_BD_FLAGS_TCP_UDP_CHKSUM);
cpu_to_le32(TX_BD_FLAGS_TCP_UDP_CHKSUM);
csum = cpu_to_le32(TX_BD_FLAGS_TCP_UDP_CHKSUM);