Hi @all,
i'm actually testing with a PPP connection to a GPRS network, using LwIP
as a small NAT router. I see incoming packets from the PPP interface,
which have different ID numbers (counting up), but the same sequence
numbers - seems to be retransmissions.
After rewriting the headers for NAT, the packets are sent to the
ethernet interface with:
err = nat_entry.cmn->cfg->in_if->output( nat_entry.cmn->cfg->in_if, q,
&( iphdr->dest ) )
What i see in wireshark, connected to the ethernet port, is every packet
is transferred fine on the ethernet - as long as the sequence number is
different. The retransmissions with same sequence numbers are not put
out on the ethernet, only the first of the packets with that sequence
number is sent out, the following packets are not.
Is there any mechanism in LwIP prevent it sending out packets with the
same sequence number as the previously sent packet?
Marco
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