I have following the samples of 0.7.x version, and I write the code to the
lwip 1.1.0 version!!
Indeed, the following codes (CODE I & II) do work , but "CODE I" will
send double packets(all of unicast-packets).
I know the problem!!
But donot anyone found that ....
if I use "CODE II" to communicate to a linux user mode socket
the sending speed will slow down, but the "CODE I" will send
it is so strange!!
ps. BTW, I donot call the etharp_tmr() rightnow, I think it is fine to
communicate with only one machines!!